• 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 relates to a balanced control valve for regulating a medium, for example an inert gas type, wherein the control valve comprises a valve housing, composed of at least two valve housing portions, in which there is an inlet port for an inlet pressure, and an outlet port for a outlet pressure, wherein in the valve body further is an inlet opening for a pilot pressure, wherein the control valve further comprises at least one spring element and one valve piston, the valve piston, via a valve seat with a seat area, in a first position closes the inlet opening and where the access pressure acts on said seat area on the valve piston and in the opposite direction as the said spring element. The new feature of a control valve according to the invention is that the valve piston comprises a further bore, so that the inlet pressure through said bore further acts on a different area and in the same direction as the said spring element, where on said inlet pressure side is arranged the said valve seat and only one. a further gasket element between said valve piston and said valve housing.
    公开号:DK201570804A1
    申请号:DKP201570804
    申请日:2015-12-04
    公开日:2017-06-26
    发明作者:Hauke Torp；Thyge Rahbæk Dueholm
    申请人:Müller Gas Equipment As；
    IPC主号:
    专利说明:

    Title: Balanced Control Valve Field of the Invention
    The present invention relates to a balanced control valve for regulating a medium, for example an inert gas type, wherein the control valve comprises a valve housing composed of at least two valve housing portions, wherein there is an inlet pressure for an inlet pressure, and an outlet opening for a outlet pressure, wherein in the valve body is further an inlet opening for a pilot pressure, wherein the control valve further comprises at least one spring element and one valve piston, the valve piston, via a valve seat with a seat area, in a first position closes the inlet opening and where the inlet pressure acts on said seat area on the valve piston and in the opposite direction as the said spring element.
    Description of prior art
    It is generally known to use gases of various types, for example inert gases, in extinguishing fires. The effect typically occurs as oxygen is displaced from the area, whereby the fire is said to suffocate and dpr. In addition, some types of gas react chemically with oxygen and / or exhaust gases in the room, while still other types of gases reduce the flame temperature, which extinguishes the flames.
    Optionally, media / gases such as, for example, carbon dioxide, argon or nitrogen, or a mixture thereof adapted for properties, may be used so that, for example, electronic equipment is not affected and / or damaged accidentally. Other types of gases may also be used, provided they do not clog the fire. Particularly in server rooms and other rooms with IT equipment, these methods and systems for fire extinguishing are used.
    A system typically comprises a pressure bottle or a battery of pressure bottles which are interconnected and provided with a control valve which, upon actuation, discharges either all the quantity of gas contained in the pressure bottles or a portion thereof via a pipe system and via a number of nozzles in the current room (s). The system may be arranged in the room itself, but will often be located in an accessible location outside the room (s) where the fire extinguishing system is to operate.
    Since it is a security system, it is of the utmost importance that the system is reliable and that it works as intended in connection with a fire. Four of the known solutions use a pilot pressure to activate one or several fire control valves. This pilot pressure is typically supplied from a pressure bottle in the system or from an external pressure source. Other systems may be designed to be activated without pilot pressure, and activation may also be based on input from one or several sensors or manually.
    Common to the known control valves for such applications is that they are often quite voluminous and constructed with many gaskets, typically in the form of O-rings, especially in the high pressure section. This increases the risk of leakage, and the friction that must be overcome during activation and use is increased. This increased friction results in more uneven regulation, as the friction causes the valve to '' jump '' between the various positions due to a need to tear the valve piston from the current position. In order to achieve uniform control, the known valves are often constructed with larger valve pistons so that larger areas can be obtained and thus greater forces. Thus, one tries to offset the influence of friction, but the increased leakage risk remains unchanged.
    From EP 2557344 A1 is known an example of a balanced control valve for regulating a medium, wherein the control valve comprises a valve housing with an inlet pressure for an inlet pressure, and an outlet opening for an outlet pressure, wherein the control valve further comprises a valve piston which via a valve seat with a seat area , in a first position, closes the inlet opening and where the valve piston further comprises a bore, so that the inlet pressure through the bore further acts on a different area opposite the seat area.
    Therefore, there is a great need for a solution that can meet the current requirements for reliability and at the same time is reliable and efficient. Such a solution may advantageously be smaller, and may be designed so that it can be protected under a standardized protective cap when mounted on a pressure bottle.
    It is an object of the invention to provide a reliable and efficiently balanced control valve, where the control valve is compact and includes a minimum of pressure side gaskets as well as a pilot pressure connection, for activating and controlling the control valve discharge pressure.
    Description of the Invention
    As mentioned initially, the present invention provides a balanced control valve for regulating a medium, for example an inert gas type, wherein the control valve comprises a valve housing composed of at least two valve housing portions, wherein there is an inlet port for an inlet pressure, and an outlet opening for a exit pressure, wherein in the valve housing there is further an inlet opening for a pilot pressure, wherein the regulating valve further comprises at least one spring element and one valve piston, the valve piston, via a valve seat with a seat area, in a first position closes the inlet opening; and wherein the inlet pressure acts on said seat area of the valve piston and in the opposite direction as said spring element.
    The new feature of a control valve according to the invention is that the valve piston further comprises a bore, so that the inlet pressure through said bore further acts on a different area and in the same direction as the said spring element, and where the said valve seat is arranged on the inlet pressure side alone. one further gasket element between said valve piston and said valve housing.
    By the term gasket element is meant a gasket which may be composed of four parts, for example a resilient O-ring and a abutment ring of PTFE, where the gasket element still acts as one independent gasket. In the present invention, the forces from the inlet pressure of the regulating piston will be approximately in balance as the forces with which the inlet pressure affects the first area are approximately abolished by the forces with which the inlet pressure affects the second area. Thus, since the supply pressure has substantially less influence on the regulating piston, a more uniform regulation is obtained when the pressure cylinders from which the medium is discharged are emptied, and the supply pressure thus decreases. In addition, the spring is in principle only necessary to ensure that the control valve is in a certain position, namely closed when the valve is depressurized. Thus, the spring can typically be selected in a smaller dimension. In a variant of a balanced control valve according to the invention, the two approximately identical areas can be of a difference in size between about 0.7 and 1.3 relative to each other. Hereby an even smaller dimension of the control valve can be obtained.
    A further and significant advantage is that the pressure side of the control valve can be constructed with only one seal or gasket, typically in the form of a small diameter O-ring on the pressure side. The advantage of this is that there is significantly less friction in the control valve. As few and as small O-rings as possible cause less friction in the valve and also a less risk of leakage, as there are fewer potential leakage points. In addition, a control valve according to the invention has a gasket screw which fixes a seat gasket in the valve piston. This makes it possible to replace the seat pack as needed. In a preferred variant of a balanced control valve according to the invention, the said inlet opening for a pilot pressure may be directly or indirectly connected to the same medium, pressure bottle or battery of pressure bottles connected to the control valve inlet opening for an inlet pressure. The pilot pressure thus originates from the bottle or from connected bottles in a battery and not from an external pressure source, which results in greater reliability while making the system simpler and cheaper.
    A preferred embodiment of a balanced control valve according to the invention comprises that the pilot pressure is regulated by a control mechanism, wherein the control mechanism comprises one or four control steps, for example a 1-stage or a 2-stage regulator, wherein said control mechanism is adapted to deliver an approximately constant pilot pressure, independent of the supply pressure of the said control mechanism. With such a 1-stage or 2-stage regulator, it can be achieved that the pilot pressure remains constant even when a pressure bottle is filled with a medium with a pressure of, for example, 300 bar, and even when the pressure bottle is almost thinner at for example 10 bar. To achieve a constant discharge pressure from the balanced control valve, a constant pilot pressure is required. In a variant of a balanced control valve according to the invention, for example, the regulated pilot pressure may be less than 0.05 times the maximum pressure in the medium, the pressure bottle or in the battery of pressure bottles connected to the control valve. In yet another variant of a balanced control valve according to the invention, the control valve may comprise manual actuators, for example a simple control handle. Hereby it is possible to make manual operation of the current equipment, which may be necessary, for example, in the event of failure of the electrical actuators. In a variant of a balanced control valve according to the invention, the control valve may comprise electric actuators, wherein the electric actuators comprise one or more sensors. Hereby it is possible to trigger, for example, a fire extinguishing by means of signals from a sensor, such as a sensor that is sensitive to rpg or heat. However, it is expected that the vast majority of installations will further comprise manual actuators. In a variant according to the invention, said activating means may be arranged to at once discharge several balanced control valves. This is achieved by connecting an electrical and / or manual actuator to the inlet opening for the pilot pressure on a pair of balanced control valves. By discharging the aforementioned activating agent, control valves on four pressure cylinders or batteries of pressure cylinders can be activated simultaneously, so that a fire is quickly and safely triggered.
    Brief description of the drawing
    A possible variant of the invention is described in greater detail below with reference to the accompanying drawings.
    FIG. 1 shows a cross section of a balanced control valve which is closed.
    FIG. 2 shows a cross section of a balanced control valve which is open.
    FIG. 3 is a cross-sectional view of a balanced control valve illustrating the respective diameters. In the description of the figures, identical or similar elements will be denoted by the same reference numerals in the various figures. Thus, no explanation of all details will be given in connection with each figure or embodiment.
    DETAILED DESCRIPTION OF THE INVENTION 1 FIG. 1 is a cross-section of a closed control valve 1 which is closed, which is illustrated by the gray fill color in parts of the valve. The control valve 1 comprises a valve housing 2, in which the valve housing 2 has an inlet opening 3 for an inlet pressure, an outlet opening 4 for an outlet pressure and an inlet opening 5 for a pilot pressure. Further, the control valve 1 comprises a spring element 6 which acts between the valve body 2 itself and a valve piston 7, the valve piston 7 comprising a seat gasket 8 which together with the valve housing 2 forms the valve seat itself. In the valve piston 7 a bore 9 is arranged and in extension of this bore 9 a gasket screw 13 is mounted which fixes the interchangeable seat gasket 8 to the valve piston 7. In the event that the seat gasket 8 is to be changed, the valve housing 2 which is composed of at least two valve body parts. Then the gasket screw 13 is removed so that the seat gasket 8 can be replaced.
    The valve piston 7 is provided with only one additional gasket 12 on those parts of the valve piston 7 which are affected by the inlet pressure, which will often be up to 300 bar, which is why it is advantageous to have only one gasket 12, whereby a less friction between the respective parts are picked up. On the parts of the valve piston 7 which are exposed only to the discharge pressure, additional gaskets 14 are arranged.
    As can be seen from the figure, the medium acts on a first area 10 and on a second area 11 on the valve piston 7, the medium spreading through the bore 9 and the sealing screw 13. The two areas 10, 11 are with a slight difference in size and the control valve 1 is hereby balanced and held in one particular position by the spring element 6. Upon activation of the valve a pilot pressure is applied in the inlet opening 5, whereby the valve piston is actuated on an area 15 , and thus outweighs the force arising from the supply pressure and from the spring element 6.
    FIG. 2 shows a cross-section of a balanced control valve 1, which is open, applying a pilot pressure via the inlet port 5 for pilot pressure. The medium is now allowed to flow over the valve seat and through openings 16 in the sides of the valve piston and out through the outlet opening 4 in the valve housing 2. Because the control valve is balanced, only a very modest pilot pressure is required for activation. The size of the departure pressure is determined by the size of the pilot pressure, however, the pilot pressure is relatively much smaller than the departure pressure. The balanced control valve is thus usable for various discharge pressures by simply changing the pilot pressure.
    FIG. 3 is a cross-sectional view of a balanced control valve illustrating the respective diameters. When the control valve is closed, the pressure from the medium acts on the areas formed by D1 and D2. As the two diameters are approximately equal - or with a slight difference - a form of equilibrium or quite modest overweight occurs to one of the sides. If D1 is greater than D2, the inlet pressure will actuate the valve piston 7 in the opposite direction to the force of the spring element 6, while the reverse is the case if D1 is less than D2. The spring element 6 is sized relative to D1 and D2, so that a preferred pilot pressure is required to actuate the control valve 1. The pilot pressure acts on the ring area formed by D5 and D3. When the control valve 1 is open, the outlet pressure acts on the ring area formed by D4 and D3 and to a lesser extent by D2 and D1. Thus, the exit pressure counteracts the pilot pressure, thereby regulating the exit pressure leaving the outlet opening 4. In the illustrated variant of a balanced control valve according to the invention, emphasis has been placed on specifying the invention as simply as possible and it is clear that one skilled in the art will be able to provide similarly balanced control valves which look different but are still within the scope of the invention, as set forth in the claims below.
    权利要求:
    Claims (7)
    [1]
    A balanced control valve (1) for regulating a medium, for example an inert gas type, wherein the control valve (1) comprises a valve housing (2) composed of at least two valve housing portions, in which there is an inlet opening (3) for an inlet pressure, and a outlet port (4) for a discharge pressure, wherein in the valve body (2) there is further an inlet port (5) for a pilot pressure, wherein the control valve (1) further comprises at least one spring element (6) and one valve piston (7), the valve piston (7), via a valve seat with a seat area, in a first position closes the inlet opening (3), and where the access pressure acts on said seat area (10) on the valve piston (7) and in the opposite direction as said spring element (6) , characterized in that the valve piston (7) further comprises a seat gasket (8) and a bore (9), so that the supply pressure through said bore (9) further acts on a different area (11) and in the same direction as said spring element. (6) and where on said pressure side, said valve seat and only one additional gasket element (12) are arranged between said valve piston (7) and said valve housing (2).
    [2]
    A balanced control valve (1) according to claim 1, characterized in that said access opening (5) for a pilot pressure is connected directly or indirectly to the same medium, pressure bottle or battery of pressure bottles connected to the access opening (3) for a inlet pressure.
    [3]
    A balanced control valve (1) according to any one of claims 1 and 2, characterized in that the pilot pressure is controlled by a control mechanism, the control mechanism comprising one or four control steps, for example a 1-stage or a 2-stage. regulator, wherein said regulating mechanism is adapted to deliver an approximately constant pilot pressure independently of said regulating mechanism's supply pressure.
    [4]
    A balanced control valve (1) according to any one of claims 1 to 3, characterized in that the control valve (1) comprises manual actuators, for example a simple control lever.
    [5]
    A balanced control valve (1) according to any one of claims 1 to 3, characterized in that the control valve (1) comprises electrical actuating means, wherein the electrical actuating means comprise one or more sensors.
    [6]
    A balanced control valve (1) according to any one of claims 4 and 5, characterized in that said actuating means are arranged to trigger a plurality of balanced control valves at one time.
    [7]
    A balanced control valve (1) according to any one of claims 1 to 6, characterized in that the size ratio between the first (10) and the second (11) area is between 0.7 and 1.3.
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    引用文献:
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    DE1142938B|1960-10-21|1963-01-31|Continental Elektro Ind Ag|Pneumatic quick-acting valve for high-voltage compressed air switch|
    US3489165A|1968-10-30|1970-01-13|Vapor Corp|Inline pressure regulator|
    IT1313296B1|1999-09-27|2002-07-17|Valbia S R L|INTERCEPTION VALVE FOR FLUIDS, WITH INTEGRATED PNEUMATIC CONTROL.|
    EP1574771A3|2004-03-09|2006-01-18|Eugen Seitz Ag|Valve for use in a stretch blow molding machine|
    GB0503101D0|2005-02-15|2005-03-23|Xamol Ltd|Valve assembly|
    ITBS20050032U1|2005-11-07|2007-05-08|Omal Spa|COAXIAL INTERCEPT VALVE FOR USE IN COMPRESSED AIR SYSTEMS|
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    EP16870031.8A| EP3384190B1|2015-12-04|2016-12-02|Counter-biased valve actuator|
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