• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention is directed to a minimum pressure control valve comprising a housing (13) with a valve inlet (11) and a valve outlet (12) connected by a chamber (16), the minimum pressure control valve (10) further comprising a valve body (17) that is movable in the chamber (16) between a closed position in which the valve inlet (11) is closed, and an open position in which the valve inlet (11) is open, the minimum pressure control valve (10) further comprising a regulator (18) for adjusting of the value of the pressure at which the valve body (17) moves to the open position.
    公开号:BE1025384B1
    申请号:E2018/5011
    申请日:2018-01-10
    公开日:2019-02-11
    发明作者:Schamphelaere Pieter De
    申请人:Atlas Copco Airpower Naamloze Vennootschap；
    IPC主号:
    专利说明:

    A minimum pressure control valve and compressor comprising such a minimum pressure control valve.
    The present invention relates to a minimum pressure control valve comprising a housing with a valve inlet and a valve outlet connected by a chamber, the minimum pressure control valve further comprising a valve body 10 movable in the chamber between a closed position in which the valve inlet is closed, and a open position in which the valve inlet is open.
    It is known that compressor installations often comprise a minimum pressure control valve, often mounted on the outlet of a pressure vessel, which can serve to separate liquid, such as oil in the case of an oil-injected compressor, from the compressed gas flowing out of the compressor element.
    By injecting a liquid, such as for example oil, into the compressor element of the compressor while the gas is being compressed, the temperature rise of the compressed gas can be kept under control. The cooling liquid is usually separated from the pressurized gas stream in a liquid separator, which is often integrated in a pressure vessel mounted downstream of the compressor element. The cooling liquid is then usually recycled and recycled, from the pressure vessel or the liquid clearer, via a cooler, to the compressor element.
    B E2018 / 5011
    As the coolant flows through the cooling circuit, the pressure of the coolant will drop. In order to ensure that the pressure of the coolant is still high enough to be re-injected into the compressor element, the pressure in the pressure vessel or the liquid separator must be kept at a sufficiently high level.
    A minimum pressure control valve ensures that the pressure in the pressure vessel never drops below a certain minimum value when the compressor installation is loaded. That minimum value is the set value of the minimum pressure control valve,
    The set value is selected in such a way that the injection of coolant is always ensured in all circumstances. This means that even under transient conditions the pressure will be kept high enough to avoid temperature peaks. The set value is also chosen so that the flow rate through the pressure vessel or the liquid separator is not too high.
    Such minimum pressure control valves are used in the industry, such as, for example, the valve disclosed in CN 101,520,103 Ά.
    A significant drawback of the known minimum pressure control valves is that they usually have a huge number of components that interact with each other. This translates into a considerably large amount of time required to assemble such a minimum pressure control valve on site, which translates into very high maintenance costs and losses due to the compressor not operating during this time frame.
    B E2018 / 5011
    In addition, each of the components will have its own tolerance, increasing individual tolerances and affecting the overall performance of the minimum pressure control valve.
    Moreover, due to such a large number of components, during assembly some components, for example the springs, would have to be pre-tensioned, which can easily lead to damage to the adjacent components that come into contact with such a spring.
    Taking into account the aforementioned disadvantages, the present invention has for its object to provide a minimum pressure control valve that is easy to produce and assemble, with much fewer interacting components and wherein the risk of incorrect assembly or incorrect operation of the minimum pressure control valve after assembly is reduced .
    The present invention has for its object to provide a minimum pressure control valve that would be adaptable to be used within compressors with different capacities without having to change components.
    Consequently, the current patent application relates to a new design of a minimum pressure control valve, which is less susceptible to wear and potential failure than traditional minimum pressure control valves.
    To this end, the invention relates to a minimum pressure control valve comprising a housing with a valve inlet and a valve outlet connected by a chamber, the minimum pressure control valve further comprising a valve body
    B E2018 / 5011
    comprises movable in the chamber between a closed position in which the valve inlet is closed, and an open position in which the valve inlet is open, the minimum pressure control valve further comprising a controller for adjusting the value of the pressure at which the valve body moves to an open position goes.
    Indeed, since the minimum pressure control valve according to the present invention comprises a controller, such a minimum pressure control valve can be adapted for each type of compressor without having to change specific components.
    Another advantage is the minimum number of components that requires expensive processing for such a minimum pressure control valve, thereby reducing the costs associated with production and maintaining its functionality, and also reducing the risk to a minimum if not eliminated that such minimum pressure control valve malfunctions due to incorrect assembly or that components are damaged during the assembly procedure. The failure possibly translating into a changed pressure value at which such a minimum pressure control valve opens, which would be particularly undesirable on the customer's side.
    The present invention is further directed to a compressor comprising a compressor element with a gas inlet and a compressed gas outlet, the compressor further comprising a pressure vessel having an inlet connected to the compressed gas outlet, wherein a minimum pressure control valve is provided at an outlet of the pressure vessel, the minimum pressure control valve a
    BE2018 / 5011 has a valve inlet connected to the outlet of the pressure vessel and a valve outlet adapted to be connected to a user network, wherein the minimum pressure control valve comprises a housing wherein the valve inlet and the valve outlet are connected by a chamber, a valve body being in the chamber is movable between a closed position in which the valve inlet is closed, and an open position in which the valve inlet is open, the minimum pressure control valve further comprising a controller for adjusting the value of the pressure at which the valve body moves to an open position.
    The invention also relates to a method for controlling the pressure in a pressure vessel of a compressor, wherein the compressor further comprises a compressor element with a gas inlet and a compressed gas outlet, wherein the pressure vessel has an inlet connected to the compressed gas outlet, wherein minimum pressure control valve is provided at an outlet of the pressure vessel, the minimum pressure control valve having a valve inlet connected to the outlet of the pressure vessel and a valve outlet adapted to be connected to a user network, the minimum pressure control valve comprising a housing with the valve inlet and the valve outlet connected are, by means of a chamber, a valve body movable in the chamber between a closed position in which the valve inlet is closed, and an open position in which the valve inlet is open, wherein for adjusting the value of the pressure at which the valve body moves towards an open position is moved, a controller is used.
    B E2018 / 5011
    The controller preferably uses the pressure at the outlet of the pressure vessel to adjust the value of the pressure at which the valve body moves to an open position.
    But it is also possible that the controller uses the pressure at the inlet of the pressure vessel to adjust the value of the pressure at which the valve body moves to an open position. This will be better for reliability.
    A minimum pressure control valve according to the invention is preferably used.
    In the context of the present invention, it must be assumed that the above-mentioned advantages with regard to the minimum pressure control valve also apply to the compressor and the method.
    With the insight to better demonstrate the characteristics of the invention, a few preferred embodiments according to the invention are described below, with reference to the accompanying drawings, in which:
    Figure 1 schematically illustrates a compressor 1 according to the present invention;
    Figure 2 schematically represents a cut-away view of a cross section of a minimum pressure control valve 10 according to an embodiment of the present invention;
    Figure 3 schematically illustrates a section of a minimum pressure control valve 10 according to an embodiment of the present invention; and
    BE2018 / 5011 Figure 4 schematically illustrates a cross section of a minimum pressure control valve 10 according to another embodiment of the present invention;
    Figures 5 and 6 schematically illustrate a seal 28 that can be used with the minimum pressure control valve 10 according to the invention.
    Figure 1 illustrates a compressor 1 comprising a compressor element 2 with a gas inlet 3 and a compressed gas outlet
    4. Generally, the compressor 1 is driven by a fixed-speed motor or a variable-speed motor 5.
    In the context of the present invention, the compressor 1 is to be understood to mean the complete compressor installation, including the compressor element 2, all typical connecting pipes and valves, the housing of the compressor 1 and optionally the motor 5 which drives the compressor element 2.
    In the context of the present invention, the compressor element 2 is to be understood to mean the compressor element box in which the compression process takes place by means of a rotor or via a reciprocating movement.
    Furthermore, the compressor element 2 can be selected from a group comprising: a screw, a tooth, a claw, a scroll, a rotary, a centrifugal, a piston, etc.
    Returning now to Figure 1, the compressor 1 further comprises a pressure vessel 6 with an inlet 7 connected to the compressed gas outlet 4, and an outlet 8 connected to a user network 9.
    B E2018 / 5011
    Furthermore, a minimum pressure control valve 10 is provided on the outlet 8, on the fluid line provided between the pressure vessel 6 and the user network 9.
    The minimum pressure control valve 10 having a valve inlet 11 connected to the outlet 8 of the pressure vessel 6 and a valve outlet 12 adapted to be connected to a user network 9.
    The minimum pressure control valve 10 comprises a housing 13 with a housing inlet 14, a housing outlet 15 and a chamber 16, as illustrated in Figure 2.
    Whereing the housing inlet 14 is brought into fluid communication with the valve inlet 11, and the housing outlet 15 is brought into fluid communication with the valve outlet 12 when the minimum pressure control valve is mounted within the compressor 1.
    The minimum pressure control valve 10 further comprising a valve body 17 movable in the chamber 16 between a closed position in which the valve inlet 11 is closed and an open position in which the valve inlet 11 is open
    It is obvious that when the valve inlet 11 is closed, no fluid or practically no fluid can flow through the minimum pressure control valve 10, i.e. from the housing inlet 14 to the housing outlet 15 and further to the user network 9. While, when the valve inlet 11 is open , the fluid can flow through the minimum pressure control valve 10, from the housing inlet 14 to the housing outlet 15 and further up to the user network 9.
    B E2018 / 5011
    To set the value of the pressure at which the valve body 17 moves to an open position, the minimum pressure control valve 10 according to the present invention further comprises a controller 18. That controller 18 is preferably a separate component of the minimum pressure control valve 10.
    In a preferred embodiment of the present invention but without any limiting character, the compressor 1 is a liquid-injected compressor, in which case the pressure vessel 6 preferably comprises a liquid separation vessel (not shown), or wherein such a liquid separation vessel may be mounted as a separate component which is part of the compressor 1.
    The liquid being injected into the compressor 1 being any type of liquid such as, for example, without any limiting character: water, oil, with or without an additive provided therein.
    In a preferred embodiment of the present invention without any limiting character, the compressor 1 is an oil-injected compressor.
    However, it cannot be excluded that the minimum pressure control valve 10 may also be mounted in an oil-free compressor.
    In another embodiment according to the present invention, the controller 18 comprises a line 19 which connects a space 20 bounded between the valve body 17 and the chamber 16 to the outlet 8 of the pressure vessel 6.
    BE2018 / 5011
    The space 20 is to be understood to mean the opening between the internal wall of the chamber 16 and the valve body 17, with the minimum pressure control valve 10 mounted.
    The space 20 will be used to be able to transport air to a first end 17a of the valve body 17.
    It goes without saying that the chamber 16 defines a cavity in which the valve body 17 is received and comprises an internal wall and an external wall, the external wall being subjected to the pressure value of the fluid at the housing outlet 15.
    By connecting the space to the outlet 8, the pressure value at the height of the space 20 is influenced by the pressure value at the height of the outlet 8. Consequently, the force generated by such a pressure value and acting on the valve body 17 affects opening and closing. closing the minimum pressure control valve 10.
    Preferably, the controller and the geometry of the conduit influence the speed at which such pressure is increased or decreased and also the pressure value at which the minimum pressure control valve 10 opens or closes.
    Back to Figure 1, the compressor 1 may further comprise an oil separation element provided at the outlet
    8, between the pressure vessel 8 and the minimum pressure control valve 10.
    In other words, the oil separation element 21 is provided downstream of the pressure vessel 6.
    B E2018 / 5011
    Such an oil separation element 21 being of any type, such as, for example, without any limiting
    character: any type of filter, any type of oil separation vessel, or
    Others.
    In a preferred embodiment according to the present invention without any limiting character, the line 19 connects the space 20 to the outlet 8 of the pressure vessel 8, upstream of the oil separation element 21.
    It could also be possible that such a line 19 connects the space 20 to the outlet 8 of the pressure vessel 6, downstream of the oil separation element 21, in which case the pressure value at the outlet 8 will be influenced by the pressure drop through the oil separation element 21.
    In a preferred embodiment of the present invention, when mounted in a vertical position, the minimum pressure control valve 10 does not include a spring.
    The minimum pressure control valve 10 according to the present embodiment actually replaces a spring that is commonly used within known minimum pressure control valves with a controller 18, thereby eliminating components that would be difficult to assemble or change on site.
    In generally used minimum pressure control valves 10, a spring is used to adjust the pressure value at which the minimum pressure control valve is opened, and depending on the capacity and operating pressure range of the compressor 1, such a spring is selected.
    B E2018 / 5011
    By replacing such a spring with a controller 18, such a pressure value can be adjusted in function of the capacity of the compressor 1. Consequently, the production and maintenance costs are lower and the service life of the minimum pressure control valve 10 is also longer.
    Such a controller 18 allows to change the pressure value manually or automatically.
    Returning now to the layout of the minimum pressure control valve 10, the valve body 17 includes a first end 17a positioned closest to the housing outlet 15 and a second end 17a positioned closest to the housing inlet 14, with a mounted minimum pressure control valve 10.
    Preferably, but without any limiting character, the conduit 19 helps to limit two areas of minimum pressure control valve 10, with different or relatively two within two areas having two different pressure values. More specifically, the difference between the area of the first end 17a of the valve body 17, and the area at the inlet 14 of the valve. The line 19 can be connected at any location along the height H of the valve body 17 or at any location within the chamber 16.
    In this case, the line 19 is connected to the chamber 16 at about half the height H, or at a relatively small distance from half the height H. But this is not necessary for the invention. Depending on the size of the minimum pressure control valve 10, the line 19 can be mounted at a distance of half the height H ranging from a few centimeters to possibly tens of centimeters.
    BE2018 / 5011
    In another embodiment according to the present invention, the controller 18 comprises a limiting module 22 adapted to be connected on the one hand to the line 19 and on the other hand to a channel 23 formed by the housing and a wall of the chamber.
    The channel 23 allowing fluid communication between the fluid flowing through the conduit 19 and the space 20 formed between the internal wall of the chamber 16 and the valve body 17. Accordingly, the channel 23 is formed as a pierce through the housing 13 and the wall of the room 16.
    In a preferred embodiment but without any limiting character, the limiting module 22 comprises a control element that is capable of controlling the volume of fluid flowing through the channel 23.
    Wherein said control element is selected from a group comprising; a screw, a ball valve, a throttle valve, a plate valve, disc valve, poppet valve, a ring valve, or any other element capable of selectively limiting the fluid flowing through the channel 23.
    But this is not necessary for the invention and can be omitted.
    The control element having a flow control pattern defined by a linear or a non-linear graph, or an ON / OFF type control.
    Such a control element being driven either manually or automatically.
    B E2018 / 5011
    If the drive is automatic, the control element can be connected via a wired or wireless connection to a control unit (not shown) that allows an electronic adjustment of the degree of opening or the position of the control element.
    Another possibility is that the control element is set once, or that the minimum pressure control valve 10 has a continuous control of the control element.
    In a preferred embodiment of the present invention without any limiting character, the limiting module 22 includes a screw to adjust the fluid flowing through the channel 23 (as illustrated in Figure 4).
    In such a situation, a thread is preferably provided in the channel 23, which makes it possible to screw the screw more tightly or less, depending on the desired volume of fluid that may flow through the channel 23.
    If the screw is mounted relatively loosely, a larger volume of fluid can flow through the channel 23 and reach the space 20, which allows the pressure value of the fluid within the space 20 to more rapidly reach the value of the pressure of the fluid at the level of the outlet 8.
    While as the screw is screwed more tightly into the thread, a smaller volume of fluid can flow through the channel 23 and reach the space 20, which is the pressure value of the fluid
    B E2018 / 5011 within the space 20 allows to reach the value of the pressure of the fluid at the level of the outlet 8 more slowly.
    In a further embodiment according to the present invention, the valve body 17 comprises a piston 24 received therein which is movable between a closed position in which the housing inlet 14 is closed and an open position in which the housing inlet 14 is open.
    In an embodiment according to the present invention but without any limiting character, in order to obtain a stable and balanced minimum pressure control valve 10, the piston 24 can be passed through the center of the valve body 17, or approximately through the center.
    Consequently, the force generated by the pressure value at the level of the chamber 16 acts through the fluid flowing through the line 19 and further through the channel 23 on both the valve body 17 and the piston 24.
    Such piston 24 including a first piston end 24a positioned closest to the housing inlet 14 and a second piston end 24b positioned within the valve body 17 closest to the first end 17a when the piston 24 is mounted within the valve body 17.
    In another embodiment according to the present invention, but without any limiting character, the piston 24 may comprise a piston channel 25, such a channel 25 allowing a pressure equalization so that the piston 24 can slide into the valve body 17 without any resistance. Consequently, the height of the piston channel can be 25
    B E2018 / 5011 selected during design and can vary between a fraction of the total height
    HP of the piston 24 and the total height of the piston 24 HP.
    Preferably, if the piston channel is formed by the full height HP of the piston
    24, the piston 24 further includes a nozzle (24c) at the first piston end 24a to control the amount of fluid circulating through it.
    In yet another embodiment of the invention, the valve body 17 may include a pipe present, preferably positioned through the center or relatively through the center of the valve body 17, starting from the first end 17a and protruding through the valve body 17 to the second end
    17b. Such a conduit being formed in the direction in which the fluid flows through the minimum pressure control valve when the minimum pressure control valve 10 is open. It should be noted that the flow that passes through the minimum pressure control valve 10 does not pass through the line 26 of the valve body.
    A current will only flow through the conduit 26 when the valve body 17 moves.
    The height of the line 26 can be selected in function of the requirements of the minimum pressure control valve 10 and the required response time.
    Such a conduit 26 allows the force generated within the chamber 16 to act on a larger surface of the valve body 17.
    BE2018 / 5011
    In another embodiment according to the present invention without any limiting character, the conduit 26 comprises a transversal branch 27, preferably formed perpendicular to or relatively perpendicular to the conduit 26 and extending to the chamber 16. Consequently, the space is limited between the space 20 at the level of the channel 23 or relatively close to where the channel 23 reaches the space 20, brought into fluid communication with the space bounded between the internal wall of the chamber 16 and the valve body 17 at the first end 17a. This will allow the controlled pressure to reach the surface of the first end 17a.
    In a further preferred embodiment according to the present invention, the minimum pressure regulating valve 10, when mounted, does not comprise a spring between the valve body 17 and the piston 24.
    Accordingly, correct mounting of the minimum pressure control valve 10 according to the present embodiment is ensured, and the amount of time required to assemble or disassemble such a minimum pressure control valve 10 is considerably reduced.
    Moreover, the production and maintenance costs are further reduced since such a commonly used spring is replaced by a channel 23, a pipe 26, and a specific manner in which the force generated by the pressure at the chamber 16 on the valve body 17 and can act on the piston 24. In fact, the omission of the spring means that the volume of material used to extract the components of such a minimum pressure control valve 10
    B Make E2018 / 5011 is reduced. The aforementioned specific way in which the force generated by the pressure at the chamber 16 can act on the valve body 17 and the piston 24 is obtained by the geometric characteristics of the channel 23, the conduit 26 and the total surface area of the valve body 17 on which the force generated by the pressure of the fluid flowing through the channel 23 acts.
    In another embodiment of the present invention, the valve body 17 includes a seal 28 adapted to be mounted on the outer contour of the valve body 17, between the valve body 17 and the internal wall of the chamber 16.
    The seal 28 is mounted below the level where the channel. 23 is formed, therefore between the height at which the channel 23 is formed and the second end 17b, when the minimum pressure control valve 10 is in an assembled state, such a minimum pressure control valve 10 being in a closed position.
    Accordingly, such a seal 28 is positioned such that a separation is created between the space 20, the pressure value being influenced by the pressure of the fluid flow through the channel 23, and the space bounded between the seal 28 and the second end 17b.
    Depending on the requirements of the minimum pressure control valve 10, more than one seal 28 can be mounted, such as, for example, 2, 3 or more seals.
    A bi-directional seal is preferably used. This is a seal that works in both directions. Figures
    B E2018 / 5011 and 6 represent a cross section of such a seal.
    Alternatively, two single-acting seals can also be used, which are placed in series with their backs facing or facing each other.
    Although in the figures the seal is placed around the valve body 17, it would also be possible to place it within the housing 13 of the minimum pressure control valve 10 by providing a groove in the chamber 16.
    Preferably, but without any limiting character, such seals can be characterized by very low friction and very little stick slip.
    In a further embodiment according to the present invention, the valve body 17 comprises a guide element 29 adapted to be mounted on the outer contour of the valve body 17, between the valve body 17 and the internal wall of the chamber 16.
    Where such a guide element 29 limits the wear of the valve body 17 and of the internal wall of the chamber 16, wear that would be caused by the movement of the valve body 17 within the chamber 16 and the friction generated thereon.
    Moreover, such guide elements absorb the transverse forces that arise during the movement of the valve body 17 within the chamber 16.
    B E2018 / 5011
    In a preferred embodiment of the present invention but without any limiting character, the seal 28 is received between two guide elements 29.
    Consequently, the wear is avoided at the height H of the valve body 17 and the stability of the valve body 17 during its movement within the chamber 16 is maintained.
    In another embodiment of the present invention, the guide element 29 may be in the form of a seal, a guide ring, or a guide tape.
    Preferably, for ease of assembly, but without any limiting character, the guide element 29 is in the form of a guide band.
    Such a guide tape may have a composition selected from a group comprising: a polymer-based composition, a PFTE (polytetrafluoroethylene) -based composition, a metal-based composition, an elastomer-based composition, a fiber and resin-based composition, a composition based on thermoplastic and fiberglass, any combination of these or any other composition. But the guide tape can be of any other suitable material.
    In a further embodiment according to the present invention, the chamber 16 comprises a groove 30 or recess above a first end 17a of the valve body 17.
    Where such a groove 30 is created in any shape such as, for example, without any limiting character: rectangle, arc of a circle, pyramid, in
    B E2018 / 5011 shape of a dome, in the shape of a mushroom or any other shape.
    Preferably, but without any limiting character, the groove 30 can be made in the form of a rectangle with rounded edges, the walls of the rectangle being formed by the internal wall of the chamber 16, with an open end to the valve body 17 to.
    Such a groove 30 creates a hollow space between the internal wall of the chamber 16 and the valve body 17 at the level of the first end 17a.
    In yet a further embodiment according to the present invention, the valve body 17 further comprises a notched portion 31 at the level of the channel 23.
    Such a notched portion 31 creates an internal space between the internal wall of the chamber 16 and the valve body 17, allowing the pressure of the fluid flowing through the channel 23 to have a greater influence on the valve body 17.
    Preferably, but without any limiting character, the notched portion 31 may be formed along the periphery of the valve body 17, thereby creating a circular channel. Consequently, the fluid flowing through the channel 23 reaches the groove 30, regardless of where the transverse branch 27 is positioned along the circumference.
    In a further embodiment of the present invention but without any limiting character, the notched portion 31 has a height HC equal to the stroke of the valve.
    BE2018 / 5011
    Consequently, the fluid flowing through the channel 23 reaches the space 20 regardless of the position of the valve.
    In yet another embodiment according to the present invention, the guide element 29 comprises a first guide band mounted on the outer contour of the valve body 17, between the notched portion 31 and a first end 17a of the valve body 17.
    In another embodiment, the guide element 29 further comprises a second guide band mounted on the outer contour of the valve body 17, between the notched portion 31 and a second end 17b of the valve body 17.
    The notched portion 31 is used to convey the controlled pressure to the first end 17a of the valve body 17.
    In yet another embodiment of the present invention, the piston 24 comprises a conical portion 32 and a stair portion 33, said stair portion 33 being adapted to be brought into contact with the housing 13 of the minimum pressure control valve 10 and wherein the conical portion 32 is provided between the stair section 33 and the housing inlet 14.
    The piston 24 with the conical portion 32 and the step portion 33 are made such that a conduction for the current is created, which ensures that there is little or no resistance and with such a weight that it falls down due to gravity when there is no other external forces are used. The piston 24 will also front
    Ensure the seal between the outlet 12 of the minimum pressure control valve 10 and the outlet of the pressure vessel 6.
    In a further embodiment according to the present invention, the stair section 33 comprises a seal 33a between a primary stair section 33b and the housing 13, to limit the wear of the stair section 33 and to increase the sealing capacities when the minimum pressure control valve 10 is brought into a closed state.
    The seal 33a and the primary stair section 33b are preferably secured by mounting on the conical section.
    In yet another embodiment of the present invention, as illustrated in Figure 4, the channel 23 brings the space bounded by the groove 30 or recess into fluid communication with the valve inlet 11.
    However, it cannot be excluded that, as explained above, the channel 23 brings the space bounded by the groove 30 into fluid communication with the outlet 8 of the pressure vessel
    6.
    In a further embodiment of the present invention, the piston 24 comprises a semicircular stair section, said semicircular stair section being adapted to be brought into contact with the housing 13, as illustrated in Figure 4.
    B E2018 / 5011
    Assuming such a layout of the stair section 33, the piston 24 would no longer require a conical section 32, thereby further restricting the layout of the minimum pressure control valve as well as the number of components.
    Preferably but without any limiting character, the semicircular stair section further comprises a flange at the height of the outer contour, the flange coming into contact with the housing 13 when the minimum pressure control valve 10 is brought into a closed state.
    In order to achieve a smooth movement between the piston 24 and the valve body 17, and to protect the piston 24 and the valve body 17 against the harmful effects of the friction generated thereon, the piston 24 further comprises a second guide element 34 adapted to be mounted between the piston 24 and the valve body 17.
    In a further embodiment according to the present invention, an upper space 35 is created between the chamber 16 and the first end 17a of the valve body 17.
    To create such an upper space 35, either the valve body 17 may include leg structures 36 positioned on the first end 17a, as illustrated in Figures 2 and 3, or the chamber 16 may include such leg structures 36, as illustrated in Figure 4.
    The shape of such leg structures 36 being chosen such that they are resistant to the impact force between the valve body 17 and the chamber 16, and in such a way
    BE2018 / 5011 that the valve body 17 would not get stuck while moving toward a closed position.
    With this upper space 35 being created such that the surface on which the force generated by the pressure of the fluid flowing through the channel 23 acts on the valve body is maximized, while the minimum pressure control valve 10 is in a closed position.
    It must be assumed that the shape of the valve body 17, the chamber 16 and of the piston 24 can be any shape.
    Preferably, without any limiting character, the shape is circular.
    In a further embodiment according to the present invention, the housing 13, the valve body 17 and the piston 24 can be made via any known technique such as via casting or via an additive production method. Other techniques are of course possible.
    In order to further reduce the production costs and the material required for this, the housing 13, the valve body 17 and the piston 24 can be manufactured via additive production methods.
    Depending on the design of the minimum pressure control valve 10, the minimum pressure control valve 10 may include some or even all of the technical features proposed herein, in any combination without departing from the scope of the invention. Under technical characteristics
    B E2018 / 5011 means at least: all components of the compressor 1, the line 19, the space 20, the limiting module 22, the channel 23, the piston 24, the piston channel 25, the line 26, the cross-branch 27, the seal 28 , the guide element 29, the groove 30, the notched section 31, the conical section 32, the stair section 33, the seal 32a, the primary stair section 32b, the second guide element 34, the upper space 35 and the leg structures 36. Not all of these features serve to be available. For example, the space 20 is only needed in one embodiment. The seal 32a is not present in the embodiment of Figure 4, wherein metal-on-metal is used for the seal. Moreover, the conduit 26 and the transverse branch 27 are not necessary.
    The operation of the minimum pressure control valve 10 is very simple and as follows.
    The piston 24, the conical section 32, the stair section 33, the seal 33a and the primary stair section 33b are all connected to each other to form one piece or a so-called check valve assembly.
    This non-return valve assembly can move or shift within a cavity in the valve body 17.
    The non-return valve assembly can move down freely when the valve body 17 is in the open position. This is the position as illustrated in Figure 3, wherein the valve body 17 is raised.
    B E2018 / 5011
    When the valve body 17 goes down, the check valve assembly will also go down.
    In this closed position of the minimum pressure control valve 10, the valve body 17 closes the valve inlet 11 by pressing the piston 24 of the non-return valve assembly against the valve housing 13 on the valve inlet 11.
    In that closed position, no or practically no fluid will be able to flow through the minimum pressure control valve 10.
    The valve body 17 will remain in that closed position as long as the pressure at the second end 17b of the valve body 17, which corresponds to the pressure at the valve inlet 11 when the valve body 17 is in the closed position, below or up to a certain pressure value remains. This pressure value corresponds to the set value of the minimum pressure control valve 10.
    Once the pressure at the second end 17b of the valve body 17 is equal to or greater than that determined pressure value, the valve body 17 will go to the open position, so that the valve body 17 does not close the valve inlet 11 and the piston 24 to the open position as long as the pressure at the valve inlet 11 is greater than the pressure at the valve outlet 12.
    In this open position of the minimum pressure control valve 10, fluid will be let through the minimum pressure control valve 10.
    The aforementioned pressure value, which corresponds to the set value of the minimum pressure control valve 10, depends on the pressure to which the first end 17a of the valve body 17 is subjected or on the pressure in the space 20.
    B E2018 / 5011
    This pressure can be regulated by the regulator 18.
    To this end, the controller 18 includes the line 19, the limiting module 22 with a control element, and the channel 23.
    The line 19 will allow to use the pressure at the outlet of the pressure vessel 8 to vary the pressure in the space 20 by allowing a flow through the line 19, the limiting module 22 and the channel 23.
    In the examples, the flow will continue to flow via the notched portion 31, the transverse branch 27 and the conduit 26 to the groove 30. In this way, the pressure at the first end 17a of the valve body 17 can be influenced by that flow.
    The controller 18 can determine if and how the pressure at the first end 17a of the valve body 17 can be influenced. For example, the control element or the aforementioned screw in the channel 23 as illustrated in Figure 4 can be controlled by the controller 18. The controller 18 will control the pressure at which the valve body 17 moves, while the channel 23 will determine how fast the valve body 17 is moving.
    In this way, the controller 18 can determine the set value at which the minimum pressure control valve 10 will open, i.e. at which point the valve body 17 will move to the open position.
    Only when the pressure at the valve inlet 11 differs from the pressure at which the first end 17a of the valve body 17
    When the valve body 17 has been subjected, the valve body 17 will move to the open position. This of course depends on the chosen ratio of the diameters of the first end 17a and the valve inlet 11.
    Therefore, by increasing the pressure at the first end 17a of the valve body 17, the pressure at the valve inlet 11 must be greater before the valve 10 will open, so that it can be ensured that the pressure in the pressure vessel 6 never drops below a certain minimum value. .
    The present invention is by no means limited to the embodiments described by way of example and shown in the figures, but such a minimum pressure control valve can be realized in all kinds of variants without departing from the scope of the invention.
    权利要求:
    Claims (26)
    [1]
    1, characterized in that the minimum pressure control valve does not comprise a spring.
    A minimum pressure control valve comprising a housing (13)
    [2]
    Minimum pressure control valve according to claim
    [3]
    3, characterized in that the controller (18) comprises a limiting module (22) adapted to be connected on the one hand to the line (19) and on the other hand to a channel (23)
    B E2018 / 5011
    formed by the housing (13) and a wall of the room (16). 5. Minimum pressure control valve according to conclusion 4, thereby characterized in that the] restrictive module (22) a screw included to the flow to pa ssen of it fluid that through the channel (23) flows.6. Minimum pressure control valve according to one or more of the
    preceding claims, characterized in that the valve body (17) comprises a piston (24) received therein that is movable between a closed position in which the valve inlet (11) is closed and an open position in which the valve inlet (11) is open.
    Minimum pressure control valve according to one or more of the preceding claims, characterized in that the regulator (18) comprises a line (19) which brings a space bounded between the valve body (17) and the chamber (16) in fluid communication with the valve inlet
    [4]
    4. Minimum pressure control valve according to claim
    [5]
    5 on a user network (9), wherein the minimum pressure control valve (10) comprises a housing (13) wherein the valve inlet (11) and the valve outlet (12) are connected by a chamber (16), a valve body (17) which is in the chamber (16) is movable between one
    5 with a valve inlet (11) and a valve outlet (12) connected by a chamber (16), the minimum pressure control valve (10) further comprising a valve body (17) movable in the chamber (16) between a closed position in which the valve inlet (11) is closed, and an open position characterized in that the minimum pressure control valve (10) further comprises a controller (18) for adjusting the value of the pressure at which the valve body moves to an open position.
    [6]
    6, characterized in that the piston (24) comprises a second guide element (34) adapted to be mounted between the piston (24) and the valve body (17).
    [7]
    Minimum pressure control valve according to claim 6, characterized in that in the mounted state the minimum pressure control valve (10) does not comprise a spring between the valve body (17) and the piston (24).
    [8]
    8. Minimum pressure control valve according to one or more of the preceding claims, characterized in that the valve body (17) comprises a seal (28) adapted to be mounted on the outer contour of the valve body (17), between the valve body (17) and the internal wall of the room (16).
    [9]
    Minimum pressure control valve according to one or more of the preceding claims, characterized in that the valve body (17) comprises a guide element (29) adapted to be mounted on the outer contour
    BE2018 / 5011 of the valve body (17), between the valve body (17) and the chamber (16).
    [10]
    A closed position in which the valve inlet (11) is closed, and an open position in which the valve inlet (11) is open, characterized in that the minimum pressure control valve (10) further comprises a regulator (18) for adjusting the value of the pressure at which the valve body (17)
    Minimum pressure control valve according to claims 8 and 9, characterized in that the seal (28) is received between two guide elements (29).
    [11]
    Minimum pressure control valve according to one or more of the preceding claims, characterized in that the chamber (16) comprises a groove (30) above a first end (17a) of the valve body (17), the first end (17a) being closest located at the valve outlet (12).
    [12]
    Minimum pressure control valve according to claim 4, characterized in that at the level of the channel (23) the valve body (17) comprises a notched part (31).
    [13]
    Minimum pressure control valve according to claim 12, characterized in that the notched portion (31) has a height equal to the stroke of the valve.
    [14]
    Minimum pressure control valve according to claim 12 or 13, characterized in that the guide element (29) comprises a first guide band mounted on the outer contour of the valve body (17), between the notched portion (31) and a first end (17a) of the valve body ( 17), the first end (17a) being closest to the valve outlet (12).
    [15]
    15 moved to an open position.
    Minimum pressure control valve according to one of claims 12 to 14, characterized in that the guide element (29) further comprises a second guide band mounted on
    B E2018 / 5011, the outer contour of the valve body (17) f between the notched portion (31) and a second end (17b) of the valve body (17), wherein the second end (17b) is located closest to the valve inlet (11) is located.
    [16]
    Minimum pressure control valve according to claims 4 and 11, characterized in that the channel (23) brings the space bounded by the groove (30) into fluid communication with the valve inlet (11).
    [17]
    The minimum pressure control valve according to claim 6, characterized in that the piston (24) comprises a semicircular stair section, the semicircular stair section being adapted to be brought into contact with the housing (13).
    [18]
    18.
    Minimum pressure control valve according to claim
    [19]
    Minimum pressure control valve according to claim 11, characterized in that an upper space (35) is created between the chamber (16) and the first end (17a) of the valve body (17).
    [20]
    Characterized in that the compressor (1) is oil injected.
    A compressor comprising a compressor element (2) with a gas inlet (3) and a compressed gas outlet (4), the compressor (1) further comprising a pressure vessel (6) with an inlet (7) connected to the compressed gas outlet (4) ), wherein a minimum pressure control valve (10) is provided on
    B E2018 / 5011 an outlet (8) of the pressure vessel (6), the minimum pressure control valve (10) having a valve inlet (11) connected to the outlet (8) of the pressure vessel (6) and a valve outlet (12) adapted to be connected
    [21]
    Compressor according to claim 20, characterized in that the compressor (1) is a liquid-injected compressor.
    [22]
    The compressor according to claim 20 or 21, thereby
    [23]
    Compressor according to one or more of claims 20 to 22, characterized in that the controller (18) comprises a line (19) that connects a space (20) bounded between the valve body (17) and the chamber (16) to a
    [24]
    Compressor according to one or more of claims 20 to 23, characterized in that the compressor (1) further comprises an oil separation element (21) provided on the
    BE2018 / 5011 outlet (8) of the pressure vessel (6), between the pressure vessel (6) and the minimum pressure control valve (10).
    [25]
    25.
    Compressor according to claims 23 and 24, characterized in that the line (19) connects the space between the valve body (17) and the chamber (20) bounded (16) to the outlet (8) of the pressure vessel (6), for the oil separation element (21).
    A method for controlling the pressure in a pressure vessel (6) of a compressor (1), wherein the compressor (1) further comprises a compressor element (2) with a gas inlet (3) and a compressed gas outlet (4), the pressure vessel (6) has an inlet (7) connected to the compressed gas outlet (4), a minimum pressure control valve (10) being provided at an outlet (8) of the pressure vessel (6), the minimum pressure control valve (10) having a valve inlet (10) 11) connected to the outlet (8) of the pressure vessel (6) and has a valve outlet (12) adapted to be connected to a user network (9), the minimum pressure control valve (10) comprising a housing (13) with the valve inlet (11) and valve outlet (12) are connected by a chamber (16), a valve body (17) which is movable in the chamber (16) between a closed position in which the (11) is closed and an open position wherein the valve inlet (11) is open, characterized in that for adjusting the value of the pressure at which the valve body (17) moves to an open position, use is made of a controller
    B E2018 / 5011
    Method according to claim 26, characterized in that the regulator (18) uses the pressure at the outlet (8) of the pressure vessel (6) to adjust the value of the pressure at which the valve body (17) moves to an open position.
    Method according to claim
    Outlet (8) of the pressure vessel (6).
    [26]
    26 or 27, characterized in that use is made of a minimum pressure control valve (10) according to one of the preceding claims 1 to 20.
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    同族专利:
    公开号 | 公开日
    EP3649349B1|2021-02-24|
    TW201907090A|2019-02-16|
    JP6975307B2|2021-12-01|
    BR112020000202A2|2020-07-07|
    CN109210234B|2021-02-05|
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    法律状态:
    2019-03-06| FG| Patent granted|Effective date: 20190211 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201762529769P| true| 2017-07-07|2017-07-07|
    US62529769|2017-07-07|EP18729209.9A| EP3649349B1|2017-07-07|2018-05-24|A minimum pressure valve and compressor comprising such a minimum pressure valve|
    ES18729209T| ES2874139T3|2017-07-07|2018-05-24|A minimum pressure valve and compressor comprising said minimum pressure valve|
    US16/623,587| US20200124041A1|2017-07-07|2018-05-24|A minimum pressure valve and compressor comprising such a minimum pressure valve|
    JP2020500168A| JP6975307B2|2017-07-07|2018-05-24|Minimum pressure valve and compressor with such minimum pressure valve|
    BR112020000202-0A| BR112020000202A2|2017-07-07|2018-05-24|minimum pressure valve and compressor comprising such minimum pressure valve|
    PL18729209T| PL3649349T3|2017-07-07|2018-05-24|A minimum pressure valve and compressor comprising such a minimum pressure valve|
    PCT/IB2018/053673| WO2019008451A1|2017-07-07|2018-05-24|A minimum pressure valve and compressor comprising such a minimum pressure valve|
    CN201810733458.6A| CN109210234B|2017-07-07|2018-07-06|Minimum pressure valve and compressor comprising such a minimum pressure valve|
    TW107123524A| TWI680233B|2017-07-07|2018-07-06|A minimum pressure valve, a compressor comprising such a minimum pressure valve and a method for regulating pressure in the pressure vessel of the compressor|
    CN201821067329.XU| CN209084064U|2017-07-07|2018-07-06|A kind of minimum pressure valve and compressor|
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