• 专利附录
  • 专利说明
  • 权利要求
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  • 引用文献
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  • 优先权
    • 专利摘要:
    A valve system (10) comprises a valve (18) with valve seat (30), a supply line section (12) for fluid, and a first branch line (14) fluidly connecting the valve (18) to the supply line section (12) and a downstream one of the valve seat (30) lying consumer line (20). Furthermore, a second branch line (16) is provided, which connects the valve (18) to the supply line section (12), wherein the second branch line (16) is in flow communication with the first branch line (14).
    公开号:CH708442B1
    申请号:CH01179/14
    申请日:2014-08-04
    公开日:2018-05-31
    发明作者:Gross Peter；Kämmer Andreas；Layer Melanie；Schäfer Peggy
    申请人:Buerkert Werke Gmbh；
    IPC主号:
    专利说明:

    Description [0001] The invention relates to a valve system comprising a valve seat valve, a fluid supply line section, and a first branch line fluidly connecting the valve to the supply line section and a consumer line downstream of the valve seat.
    Such valve systems are known from the prior art, which supply via a branch line a nachge-switched fluidic process with a fluid, wherein the switching valve is connected via the branch line with the supply-supply line section in flow communication. In these valve systems has proven to be disadvantageous that the fluid can leave deposits in the branch line, if the fluid is not constantly handled in the branch line. In order to avoid this, solutions are already known from the prior art. For example, the branch line is made very short, so that possible deposits can occur only in a very limited area. An alternative solution provides for a drive unit which constantly actively envelopes the fluid in the branch line when the valve is not switched. However, these known solutions are disadvantageous in that they involve a great deal of effort or are not applicable to certain valve systems.
    It is therefore an object of the invention to further develop such a valve system or to improve that a deposit in the branch line can be prevented by simple means.
    The object is achieved according to the invention by a valve system comprising a valve with valve seat, a supply line section for fluid and a first branch line, which fluidly connects the valve to the supply line section, and a consumer line located downstream of the valve seat, wherein a second branch line is provided which connects the valve to the supply line section, wherein the second branch line is in flow communication with the first branch line. The basic idea of the invention is that the fluid in the first branch line is constantly handled via the second branch line, so that no negative effects can occur, such as deposits, corrosion, microbial contamination or decomposition.
    The first branch line is thus made flushable due to the second branch line. The second branch line is assigned to the first branch line and is in flow communication with the first branch line.
    In particular, it is provided that the second branch line is connected in parallel to the first branch line formed. This ensures that the two branch lines are in constant communication with each other, regardless of the valve position of the valve.
    According to one embodiment of the invention, it is provided that the valve has an inflow chamber into which the two branch lines open at a distance from each other. The two branch lines are in fluid communication with each other via the inlet chamber of the valve, so that the first and the second branch line with the inflow chamber form a kind of bypass channel for the supply line section. The bypass channel formed in this way runs in circuit parallel to the supply line section. Furthermore, it is achieved that the inflow chamber is also flushable.
    Furthermore, it can be provided that the two branch lines open upstream of the valve seat in the inflow chamber. The fluid can flow continuously from the supply line section through the two branch lines, this being in particular independent of the position of the valve seat or the circuit of the valve. In particular, the inflow chamber surrounds and adjoins the valve seat so that the entire fluid-filled space between the supply line section and the valve seat is flowed through.
    According to a further embodiment of the invention, a pressure device for generating a Druckgefâlles is provided in the supply line section. The pressure difference can be generated via a cross-sectional change in the supply line section or, more generally, a change in the velocity of the fluid. A pressure device that creates the pressure drop across a cross-sectional change may be an orifice or venturi. The speed change indirectly creates a pressure gradient.
    In particular, it is provided that the first and the second branch line open at locations in the supply line section at which prevail different fluid pressures during operation. The different fluid pressures provide for the fluid to flow through the branch conduits and to be in constant motion, being conducted through the first branch line into the inflow chamber and through the second branch line back to the supply line section. A constant fluid exchange is thereby made possible.
    It is further provided that the first branch line in the upstream or downstream of the pressure device and the second branch line downstream of the pressure device open into the supply line section. The different fluid pressures of the fluid are established via the pressure device, with the branch lines leading into the supply line section at the corresponding locations, so that a constant flow of fluid through the first branch line is guaranteed.
    In particular, it is provided that a branch line forms a bypass line. This guarantees that the fluid, which would typically be in the first branch line when the valve is closed, can flow back into the supply line section, so that a constant transfer of the fluid is ensured. With the valve open, the fluid can only flow back through one, for example the first branch line to the consumer line and, with the valve closed, through both branch lines back to the supply line section.
    According to one embodiment it is provided that the valve is a 2/2-way valve. This means that the two branch lines are constantly in flow communication via the inlet chamber of the valve. The fluid can thus be handled continuously, even with the valve open, depending on the selected pipe diameters.
    According to a further embodiment it is provided that the valve is a 3/2-way valve. By means of the 3/2-way valve, the circulation can be controlled directly by the valve, because when the valve is open only fluid flows from a branch line to the consumer line.
    In particular, the valve has an inflow chamber, which has at least a first port and a second port, with which the first and the second branch line are connected, wherein the first and the second connection are in flow communication with the valve closed. That is, as long as the valve is in a non-switched state, the fluid may flow back into the supply line section through the first branch line and via the second branch line. When the valve is open, it is not possible to turn it over because the flow connection between the first branch line and the second branch line is interrupted by the valve. When the valve position is open, the consumer line is in fluid communication with the first branch line, so that the fluid flows from the supply line section via the second branch line and the inflow chamber to the consumer line.
    The valve system according to the invention is preferably designed such that the inflow chamber is in fluid communication with the supply line section when the consumer line is closed via both connections, as has already been explained above.
    The inflow chamber is not simply an arbitrarily appended section of the first and / or second branch line, but a larger chamber into which the branch lines open. Preferably, this is not necessarily the case, there is an abrupt jump in cross section at the first and at the second connection from the corresponding branch line to the inflow chamber. In this cross-sectional jump, the cross-section relative to the inflow direction of the respective branch line increases to at least twice the cross-section of the branch line in the region of its mouth.
    The valve seat should point in the interior of the inlet chamber, that is, with the valve open, the valve seat is open to the interior of the valve chamber.
    The valve system according to the invention may have a media-open valve. This means that a valve stem, which comes to rest against the valve seat of the branch line when the corresponding inflow opening is closed, is independent of the switching state of the valve in direct flow connection to the Versorgungsleitungsab section. Thus, the medium in the supply line section also flows through the valve and contacts the valve stem. The valve is therefore not a media-separated valve as a diaphragm valve, in which the disadvantages provided by the invention do not occur anyway.
    The valve stem can protrude in the closed position into the interior of the inflow chamber, preferably even in each of its positions. This in turn means that the valve stem, irrespective of the switching state of the valve, is permanently surrounded by or in contact with the medium in the supply line section.
    Further advantages and features will become apparent from the following description and the following drawings, to which reference is made. In the drawings show:
    1 is a sectional view of the inventive valve system according to a first embodiment, and
    Fig. 2 is a sectional view of the inventive valve system according to a second embodiment.
    In Fig. 1, a valve system 10 for fluids is shown. The valve system 10 comprises a supply line section 12 for fluid supply, which is connected via a first branch line 14 and a second branch line 16 to a valve 18. Downstream of the valve 18, a consumer line 20 is provided which, depending on the position of the valve 18, can be supplied with a fluid from the supply line section 12.
    In the supply line section 12, a printing device 22 is also provided, which divides the supply line section 12 into a first section 12a upstream of the printing device 22 and a second section 12b downstream of the printing device 22.
    In the embodiment shown, the pressure device 22 is designed as a Venturi nozzle. The pressure device 22 generates a pressure differential within the supply line section 12 such that the fluid within the supply line section 12 upstream or in the pressure device 22 has a pressure other than downstream of the pressure device 22.
    The first branch line 14 opens with a first orifice 24 and the second branch line 16 with a second orifice 26 in the supply line section 12 and in the first section 12a and in the second section 12b. The two estuaries 24, 26 are therefore provided at locations of the supply line section 12, where different fluid pressures of the fluid prevail.
    In the embodiment shown, the first orifice 24 is provided in the pressure device 22, where-against the second orifice 26 downstream of the pressure device 22 is located.
    The two branch lines 14, 16 are also permanently in fluid communication with each other via an inflow chamber 28 of the valve 18.
    For this purpose, the two branch lines via a first port 28a and a second port 28b with the inflow chamber 28 in the valve 18 are connected. The two branch lines 14, 16 form with the inflow chamber 28 a kind of bypass channel to the supply line section 12, which runs parallel to the supply line section 12.
    Both branch lines 14,16 open at their terminals 28a and 28b in an abrupt cross-sectional jump in the inflow chamber 28, wherein the cross section in the inflow more than twice the cross-section, transverse to the inflow. The inflow chamber 28 is thus geometrically distinguishable from the branch lines 14, 16 and delimited.
    This applies, as well as in the features listed below, for the second embodiment.
    Via the first opening point 24, the fluid can flow from the supply line section 12 into the first branch line 14, which flows back into the supply line section 12 through the inflow chamber 28 and the second branch line 16 when the valve 18 is closed.
    Since the two branch lines 14, 16 via their respective orifice 24, 26 open at points in the supply line section 12, where there is a different fluid pressure, a constant flow of fluid through the branch lines 14, 16 is generated without the fluid must be additionally pressurized.
    This continuous flow ensures that the fluid within the first branch line 14 is permanently in motion, so that, for example, no deposits can form.
    The flow of the fluid through the bypass channel formed by the first branch line 14, the inflow chamber 28 and the second branch line 16 takes place in particular when the valve 18 is closed.
    When the valve 18 is transferred to its open state, the fluid can flow via the first branch line 14 and the inflow chamber 28 into the consumer line 20.
    For this purpose, the valve 18 with its adjoining the inflow chamber 28 valve seat 30, an inflow opening 32 of the consumer line 20 free.
    The valve 18 acts via its armature acting as a valve stem 34 with a solenoid coil 36, so that the valve 18 is switched accordingly. After switching of the valve 18, there is a flow connection between the supply line section 12 via the first orifice 24, the first branch line 14 and the inflow chamber 28 and the inflow opening 32 to the consumer line 20. When the armature 34 abuts the valve seat 30 (see FIG. 1), the valve is closed.
    In all embodiments, the valve seat 30 points into the interior of the inflow chamber 28, so that it faces and does not lie outside the inflow chamber.
    The valve stem 34, this also applies to all embodiments, protrudes in its closed position, preferably in all positions in the interior of the inflow chamber 28, so in each switching state of the medium in the supply line section 12 is flown.
    The preferred embodiment of the invention provides that in each switching state, a flow in the in-flow chamber 28 is present when there is a media flow in the supply line section 12. This avoids any sticking of the plunger or the formation of deposits.
    The valve 18 is a media-open type valve in which the valve stem 34, when seated on a valve seat, is in direct flow communication with the supply line portion, regardless of the switching state of the valve. Thus, there is no diaphragm that would separate a control fluid from a process fluid and protect the valve stem from an influx of process fluid.
    Depending on the design of the line diameter, in particular that of the consumer line 20 in comparison to the first branch line 14, a partial circulation of the fluid via the first branch line 14 and the second branch line 16 can take place with the valve 18 open.
    FIG. 2 shows a second embodiment of the valve system 10 according to the invention, which differs from the first embodiment as follows: The pressure device 22 in the supply line section 12 is a diaphragm which alters the cross section such that a pressure gradient forms within the supply line section 12.
    Further, the second embodiment differs from the first embodiment in that the first orifice 24 is formed upstream of the pressure device 22. The two mouth points 24, 26 of the
    权利要求:
    Claims (16)
    [1]
    However, first and second branch lines 14, 16 are still arranged at locations of the supply line section 12, where there is a fluid pressure difference of the fluid, in particular in the sections 12a and 12b, respectively. The second embodiment of the valve system 10 is further different from the first embodiment shown in Fig. 1 in that the valve 18 in the second embodiment is a 3/2-way valve. By means of the 3/2-way valve of the first branch line 14, the second branch line 16 and the in-flow 28 existing bypass channel can be interrupted by the valve 18. For this purpose, the valve stem 34 is transferred to the open position, not shown here. In the open position of the valve 18 of the second embodiment, the consumer line 20 is connected via its inflow opening 32 with the inflow chamber 28 and the second branch line 16 in fluid communication. This means that when the valve 18 is open, the fluid flows from the supply line section 12 via the second branch line 16 to the consumer line 20. It can already be seen that there is no difference between the first and the second branch line 14, 16. The first branch line 14 is the bypass line of the second branch line 16 or vice versa. The above-mentioned differences between the first and second embodiments are independent of each other, so that a valve system 10 according to the first embodiment may be formed with a pressure device 22 according to the second embodiment, and vice versa. Further, the first orifice 24 of the first embodiment may also be provided upstream of the pressurizer 22, and vice versa, regardless of the embodiment of the printer 22. Further, it is possible to use the first embodiment with a 3/2 way -Ventil and vice versa, the second embodiment of the valve system 10 to be provided with a 2/2-way valve. With the valve system 10 according to the invention, it is possible for the branch line 14 branching off from the supply line section 12 to be flowed through permanently. Therefore, the valve system 10 according to the invention is particularly well suited for sensitive, aggressive, temperature-sensitive or otherwise unstable fluids. claims
    A valve system (10) comprising a valve (18) with valve seat (30), a supply line section (12) for fluid and a first branch line (14) fluidly connecting the valve (18) to the supply line section (12), and a consumer line (20) lying downstream of the valve seat (30), characterized in that a second branch line (16) is provided connecting the valve (18) to the supply line section (12), the second branch line (16) being connected to the first branch line (14) is in flow communication.
    [2]
    2. Valve system (10) according to claim 1, characterized in that the second branch line (16) connected in parallel to the first branch line (14) is formed.
    [3]
    3. Valve system (10) according to claim 1 or 2, characterized in that the valve (18) has an inflow chamber (28) into which the two branch lines (14, 16) open at a distance from each other.
    [4]
    4. Valve system (10) according to claim 3, characterized in that the two branch lines (14, 16) upstream of the valve seat (30) open into the inflow chamber (28).
    [5]
    5. Valve system (10) according to any one of the preceding claims, characterized in that in the supply line section (12), a pressure device (22) is provided for generating a Druckgefâlles.
    [6]
    6. Valve system (10) according to claim 5, characterized in that the first and the second branch line (14,16) at locations (24, 26) in the supply line section (12) open at which prevail different fluid pressures during operation.
    [7]
    7. valve system (10) according to claim 5 or 6, characterized in that the first branch line (14) in the or upstream of the pressure device (22) and the second branch line (16) downstream of the pressure device (22) in the supply line section (12). lead.
    [8]
    8. Valve system (10) according to one of the preceding claims, characterized in that one of the branch lines (14, 16) forms a bypass line.
    [9]
    9. Valve system (10) according to any one of the preceding claims, characterized in that the valve (18) is a 2/2-way valve.
    [10]
    10. Valve system (10) according to one of claims 1 to 8, characterized in that the valve (18) is a 3/2-way valve.
    [11]
    11. Valve system (10) according to claim 10, characterized in that the valve (18) has an inflow chamber (28) has at least a first port and a second port, with which the first and the second branch line (14 , 16), the first and second ports being in fluid communication with the valve (18) closed.
    [12]
    12. Valve system according to claim 11, characterized in that the inflow chamber (28) with closed consumer cherleitung (20) via both ports (28 a, 28 b) in each case with the supply line section (12) in flow communication.
    [13]
    13. Valve system according to claim 11 or 12, characterized in that between the first and / or second branch off-line (14, 16) and the inflow chamber (28) an abrupt jump in cross-section is present, wherein the inflow chamber (28) in the Compared to the branch line (14, 16) has greater cross-section.
    [14]
    14. Valve system according to one of claims 11 to 13, characterized in that the valve seat (30) points in the interior of the inflow chamber (28).
    [15]
    15. Valve system according to one of the preceding claims, characterized in that the valve (18) is a medie-open valve, wherein a valve stem (34), which comes to rest on the valve seat (30) when the associated inflow opening (34). 32) is closed, regardless of the switching state in the direct flow connection to the supply line section (12).
    [16]
    16. Valve system according to claim 15, characterized in that the valve stem (34) projects in a closed position into the interior of the inflow chamber (28).
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201320103483|DE202013103483U1|2013-08-02|2013-08-02|valve system|
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