阅读说明：本技术 减压阀 (Pressure reducing valve ) 是由 M·方迈尔 于 2020-02-04 设计创作，主要内容包括：本发明涉及一种减压阀(1),包括阀壳体(2)和罐形的阀体(3),在所述阀壳体的壳体内部空间中设置阀支承件(4),所述阀支承件具有至少一个穿流通道(5),所述阀体可从打开位置克服回位力移动到关闭位置中地引导,在所述关闭位置中,阀体(3)以其罐形形状的周向边缘(6)这样贴靠在设置在阀支承件(4)上的并且构成为密封圈(18)的阀支座(7)上,使得阀体(3)闭锁所述至少一个穿流通道(5)的至少一个通道开口(8)。对于按照本发明的减压阀(1),特征在于,密封圈(18)保持在阀支承件(4)的在外周侧敞开的环形槽(32)中并且在两侧由环形槽(32)的槽侧面(33、34)轴向支承,朝向阀体(3)的槽侧面(33)在减压阀(1)的关闭位置中在密封圈(8)上贴靠的阀体(4)的内周之前结束,在密封圈(18)的朝向阀体(3)的端面上成形密封唇状的环绕的成形部(35),并且该密封唇状的成形部(35)在减压阀(1)的输入侧(A)上存在的初级压力上升时可贴靠到阀体(3)的内周上。(The invention relates to a pressure reducing valve (1) comprising a valve housing (2) and a pot-shaped valve body (3), in the housing interior of which a valve support (4) is arranged, which has at least one flow-through channel (5), which is guided such that it can be moved from an open position against a restoring force into a closed position, in which the valve body (3) rests with its pot-shaped circumferential edge (6) on a valve seat (7) arranged on the valve support (4) and designed as a sealing ring (18) in such a way that the valve body (3) blocks at least one passage opening (8) of the at least one flow-through channel (5). The pressure reducing valve (1) according to the invention is characterized in that the sealing ring (18) is held in an annular groove (32) of the valve support (4) which is open on the outer circumference and is axially supported on both sides by groove flanks (33, 34) of the annular groove (32), the groove flank (33) facing the valve body (3) ends before the inner circumference of the valve body (4) which rests against the sealing ring (8) in the closed position of the pressure reducing valve (1), a circumferential profile (35) of the sealing lip is formed on the end face of the sealing ring (18) facing the valve body (3), and the profile (35) of the sealing lip can rest against the inner circumference of the valve body (3) when the primary pressure prevailing on the input side (A) of the pressure reducing valve (1) rises.)

1. Pressure relief valve (1) comprising a valve housing (2) and a pot-shaped valve body (3), in the housing interior of which a valve support (4) is arranged, which has at least one throughflow channel (5), which can be guided in a manner that it can be moved from an open position against a restoring force into a closed position, in which the valve body (3) rests with its pot-shaped circumferential edge (6) on a valve seat (7) arranged on the valve support (4) and designed as a sealing ring (18) in such a way that the valve body (3) closes off at least one passage opening (8) of the at least one throughflow channel (5), characterized in that the sealing ring (18) is held in an annular groove (32) of the valve support (4) that is open on the outer circumferential side and is axially supported on both sides by groove flanks (33, 34) of the annular groove (32), the groove flank (33) facing the valve body (3) ends before the inner circumference of the valve body (4) which rests against the sealing ring (18) in the closed position of the pressure reducing valve (1), a circumferential bead (35) of a sealing lip is formed on the end face of the sealing ring (18) facing the valve body (3), and the bead (35) of the sealing lip can rest against the inner circumference of the valve body (3) when the primary pressure prevailing on the input side (A) of the pressure reducing valve (1) rises.

2. A pressure relief valve according to claim 1, characterized in that an annular space (37) is provided between the groove base (36) of the annular groove (32) and the sealing lip-shaped formation (35), said annular space communicating with the inlet side (a) of the pressure relief valve (1).

3. A pressure-reducing valve according to claim 1 or 2, characterized in that at least one pressure compensation channel (38) is provided in the region of the annular groove (32), which connects the input side of the pressure-reducing valve (1) to the annular space (37).

4. A pressure-reducing valve according to one of claims 1 to 3, characterized in that at least one recess (39) or indentation is provided on the end-side edge of the sealing-lip-shaped formation (35) facing the valve body (3), which recess or indentation connects the annular space (37) in a fluid-conducting manner to an annular gap (40) which is provided between the valve support (4) and the valve body (3) in the closed position of the pressure-reducing valve (1).

5. The pressure-reducing valve as claimed in one of claims 1 to 4, characterized in that the end-side edge of the sealing-lip-shaped profile (35) facing the valve body (3) is formed crowned and has recesses (39) spaced apart from one another.

6. Pressure-reducing valve according to one of claims 1 to 5, characterized in that the at least one return element is a helical compression spring (13).

7. The pressure-reducing valve according to one of claims 1 to 6, characterized in that the valve support (4) has a valve support section (16), the valve support section (16) bearing axially fixedly against the housing inner periphery of the valve housing (2).

8. The pressure-reducing valve as claimed in claim 7, characterized in that the valve support section (16) of the valve support (4) is of disk-shaped design.

9. The pressure-reducing valve as claimed in one of claims 1 to 8, characterized in that the valve support (4) has a guide section (17), on which guide section (17) the pot-shaped valve body (3) is movably guided with its valve body inner circumference.

10. Pressure-reducing valve according to one of claims 7 to 9, characterized in that an annular groove (32) is provided on the valve support section (16) and/or the guide section (17).

11. Pressure-reducing valve according to claim 9 or 10, characterized in that the valve support section (16) and the guide section (17) of the valve support (4) are connected by a connecting section (20).

12. The pressure-reducing valve according to claim 11, characterized in that the at least one passage opening (8) of the at least one through-flow passage (5) is provided in the connecting section (20).

13. Pressure-reducing valve according to one of claims 1 to 12, characterized in that the sealing ring (18) is manufactured from an elastic material at least in the region of its sealing-lip-shaped formation (35) and the sealing-lip-shaped formation (35) is elastically pressed against the valve body (3) in the closed position of the pressure-reducing valve (1).

Technical Field

The invention relates to a pressure relief valve comprising a valve housing, in the housing interior of which a valve support is arranged, which has at least one flow channel, and a pot-shaped valve body, which is guided so as to be movable from an open position against a restoring force into a closed position, in which the pot-shaped circumferential edge of the valve body rests against a valve seat arranged on the valve support and designed as a sealing ring, in such a way that the valve body blocks at least one passage opening of the at least one flow channel.

Background

A pressure reducing valve of the type mentioned at the outset is already known from WO 2015/161905, which limits the water pressure in the line section downstream of the pressure reducing valve to a defined maximum value and should prevent a rupture in the region of this downstream line section caused by a pressure rise exceeding the maximum value. The previously known pressure relief valves have for this purpose a valve housing which can be inserted or can be connected intermediately into the fluid line. A pot-shaped valve body is arranged in the housing interior of the valve housing. Previously known pressure relief valves have a valve support in which at least one through-flow channel is arranged. If the line cross section in the downstream line section shrinks and the water pressure rises there in a step-like manner, the movably guided valve body is moved under the pressure of the flowing medium from the open position against the restoring force into the closed position in which the valve body with its pot-shaped circumferential edge rests against a valve seat provided on the valve support and formed by the sealing ring in such a way that the valve body blocks the at least one passage opening of the at least one flow channel. Since the valve body is gradually pressed against the restoring force of the at least one restoring element in the direction of the valve support when the water pressure in the line section upstream of the pressure reducing valve rises, and thus the pressure loss increases at the passage opening, which is thereby smaller, the pressure of the fluid in the line section downstream of the pressure reducing valve is limited to a defined maximum value. However, if such previously known pressure reducing valves are connected upstream of the on/off valve or check valve, in the closed position of the pressure reducing valve, a portion of the primary water pressure present upstream of the pressure reducing valve can creep through the pressure reducing valve and the static pressure in the region between the pressure reducing valve and the subsequent on/off valve in the flow direction can rise such that a rupture of the application of the pressure load arranged downstream occurs.

Disclosure of Invention

The object is therefore, in particular, to provide a pressure relief valve of the type mentioned at the outset which, in the closed position, suppresses an increase in the static pressure in the region between the pressure relief valve and the downstream application and effectively prevents a rupture in the region of the line section due to the increased pressure increase.

The solution according to the invention of this object is achieved in particular in a pressure relief valve of the type mentioned at the outset in that the sealing ring is held in an annular groove of the valve support which is open on the outer circumference and is axially supported on both sides by groove flanks of the annular groove, the groove flanks facing the valve body terminating before the inner circumference of the valve body which rests against the sealing ring in the closed position of the pressure relief valve, a circumferential profile of the sealing lip being formed on the end face of the sealing ring facing the valve body, and the profile of the sealing lip being able to rest against the inner circumference of the valve body when a pressure rise occurs on the input side of the pressure relief valve in the closed position of the pressure relief valve.

The pressure reducing valve according to the invention has a valve housing which can be fitted or can be connected intermediately to a fluid line in order to limit the water pressure in a line section downstream of the pressure reducing valve to a defined maximum value. The sealing ring forming the valve seat is held in an annular groove of the valve support, which is open on the outer circumference, and is axially supported on both sides by groove flanks of the annular groove. The groove side facing the valve body ends here in the closed position of the pressure relief valve before the inner circumference of the valve body, which bears against the sealing ring. On the end face of the sealing ring facing the valve body, a circumferential profile of the sealing lip is formed. The sealing lip-shaped profile bears sealingly against the inner periphery of the valve body in the closed position of the pressure relief valve when a primary pressure rise is present on the input side of the pressure relief valve. Since the sealing ring is axially supported on both sides by the groove flanks of the annular groove, suction-induced deformations on the sealing ring are suppressed. In this way, the sealing-lip-shaped profile prevents an undesired pressure rise of the sealing-lip-shaped profile also on the discharge side of the pressure relief valve in the closed position of the pressure relief valve.

In order to be able to bring the primary pressure prevailing on the input side of the pressure relief valve into sealing abutment of the sealing lip-shaped profile on the sealing ring against the inner circumference of the pot-shaped valve body in the closed position of the pressure relief valve, it is advantageous if an annular space is provided between the groove base of the annular groove and the sealing lip-shaped profile, said annular space communicating with the input side of the pressure relief valve.

In a preferred embodiment of the invention, it is provided that at least one pressure compensation duct is provided in the region of the annular groove, which connects the inlet side of the pressure relief valve to the annular space.

According to a particularly simple and advantageous embodiment of the invention, it is provided that at least one recess or recessed portion is provided on the end-side edge of the sealing lip-shaped portion facing the valve support, which recess or recessed portion fluidically connects the annular space to an annular gap provided between the valve support and the valve body in the closed position of the pressure-reducing valve.

In order to be able to achieve a good access of the primary pressure from the inlet side of the pressure relief valve into the annular space between the sealing lip-shaped profile and the valve support, it is advantageous if the end-side edge of the sealing lip-shaped profile facing the valve support is formed crowned and has recesses spaced apart from one another.

The restoring element used as a restoring force can be, for example, a rubber-elastic component. However, according to a particularly simple and expedient embodiment of the invention, it is provided that the at least one restoring element used as a restoring force is a helical compression spring.

In order to ensure a functionally reliable and displaceable guidance of the valve body on the valve support, it is advantageous if the valve support has a valve support section which bears axially fixedly on the housing inner circumference of the valve housing and/or in a centered manner relative to the housing inner circumference. In this case, according to a preferred embodiment of the invention, the valve support section of the valve support is disk-shaped.

In order to be able to push the valve body gradually and onto the valve support with increasing pressure of the fluid, it is advantageous if the valve support has a guide section on which the pot-shaped valve body is guided with its valve body inner circumference in a displaceable manner.

Drawings

Further developments according to the invention result from the figures in conjunction with the description and the claims. The invention is explained in more detail below with the aid of preferred examples.

Wherein:

fig. 1 is a pressure relief valve shown in longitudinal section, comprising a valve housing, in the housing interior of which a pot-shaped valve body is guided displaceably on a valve support, wherein the valve body is in the open position of the pressure relief valve;

fig. 2 shows the pressure relief valve of fig. 1 in its closed position, in which the valve body bears with its end-side circumferential edge against a sealing ring serving as a valve seat and arranged in an annular groove of the valve support;

fig. 3 shows a detail in longitudinal section of the pressure relief valve of fig. 1 and 2 in its closed position so as to enclose a defined partial region in fig. 2;

FIG. 4 shows a perspective view of the pressure relief valve of FIGS. 1-3 with its component parts pulled away from each other; and

fig. 5 is a perspective bottom view of a sealing ring serving as a valve seat of a pressure relief valve, wherein the sealing ring is shown partially cut away.

Detailed Description

In fig. 1 to 5, a pressure reducing valve 1 is shown, through which flows in the direction of the arrow Pf1, which can be inserted, for example, into a water line and which is intended to limit the water pressure in a line section downstream of the pressure reducing valve 1 to a certain maximum value. The pressure reducing valve 1 has a valve housing 2 which can be fitted into or can be connected intermediately to the fluid line in order to limit the water pressure in the line section downstream of the pressure reducing valve 1 to a defined maximum value. A pot-shaped valve body 3 is arranged in the housing interior of the valve housing 2. The pressure relief valve 1 has a valve support 4 in which at least one flow channel 5 is arranged. If the line cross section in the downstream line section shrinks and the water pressure rises there in a step-like manner, the movably guided valve body 3 is moved under the pressure of the flowing medium from the open position shown in fig. 1, against the restoring force of the at least one restoring element, into the closed position shown in fig. 2 and 3, in which the valve body 3 with its pot-shaped end-side circumferential edge 6 rests against a valve seat 7 provided on the valve support 4 and formed by a sealing ring 18, in such a way that the valve body 3 blocks the at least one passage opening 8 of the at least one flow channel 5. Since the valve body 3 is pressed against the restoring force of the at least one restoring element in the direction of the valve support 4 in a step-by-step manner in the event of an increase in the water pressure in the line section upstream of the pressure reducing valve 1, and thus the pressure loss increases at the passage opening 8 which is thus smaller, the pressure of the fluid in the line section downstream of the pressure reducing valve 1 is limited to a defined maximum value. The sealing ring 18 forming the valve support 7 is held in an annular groove 32 of the valve support 4 which is open on the outer circumference and is axially supported on both sides by groove flanks 33, 34 of the annular groove 32. As can be seen in particular from the longitudinal section of the detail in fig. 3, the groove flank 33 facing the valve body 3 ends here before the inner circumference of the valve body 3, which in the closed position of the pressure relief valve abuts the sealing ring 18. A circumferential bead 35 of the sealing lip is formed on the end face of the sealing ring 18 facing the valve support 4. The sealing lip-shaped profile 35 bears sealingly against the inner periphery of the valve body 3 in the closed position of the pressure reducing valve 1 when the primary pressure prevailing on the input side a of the pressure reducing valve 1 rises. Since the sealing ring 18 is axially supported on both sides between the groove flanks 33, 34 of the annular groove 32, suction-induced deformation of the sealing lip-shaped profile 35 is suppressed. In the closed position of the pressure reducing valve 1, the sealing-lip-shaped formation 35 bears sealingly against the inner periphery of the valve body 3 in the closed position of the pressure reducing valve 1 when the primary pressure prevailing on the inlet side rises and in this way prevents an undesired pressure rise also on the outlet side B of the pressure reducing valve 1. The pressure reducing valve 1 shown here can therefore be used particularly well in applications in which an on/off valve, for example, connected upstream of a WC shower is provided on the outlet side of the pressure reducing valve 1.

As can be seen clearly in fig. 1, 2 and 4, a central retaining sleeve 9 is provided on the tank bottom of the valve body 3 on the inside of the end face, into which retaining sleeve a retaining pin 10 provided on the valve support 4 projects. A stop 11 is provided on the inner circumference of the retaining sleeve 9, which stop interacts with a mating stop 12 on the outer circumference of the retaining pin 10 in such a way that, in the open position of the pressure-reducing valve 1, the stop 11 and the mating stop 12 define the displacement travel of the valve body 3 relative to the valve carrier 4. Since the stop 11 and the cooperating stop 12 interacting therewith define the displacement path of the valve body 3 relative to the valve carrier 4 into the open position, the pressure relief valve 1 shown here is prevented from being accidentally disassembled during storage, transport or assembly. The valve carrier 4, the valve body 3 and the restoring elements acting between them, together with the sealing rings 18, 19 associated therewith, actually form a unit for installation, which is used to complete the pressure reducing valve 1 and which only has to be installed in the valve housing 2. The assembly of the pressure reducing valve 1 shown here is thereby significantly simplified.

As can be seen in fig. 1 and 2, the at least one return element is formed here as a helical compression spring 13. Here, a helical compression spring 13 serving as a return element surrounds the retaining pin 10 and the retaining sleeve 9. The retaining pin 10 and the retaining sleeve 9 are oriented coaxially to one another and to the valve housing longitudinal axis. As can be seen in fig. 1 and 2, a stop 11 is provided on the free end-side end region of the retaining sleeve 9. In order to be able to determine the displacement path of the valve body 3, which is guided displaceably on the valve carrier 4, for a sufficiently long time, a counter stop 12 is also provided on the free end-side end region of the retaining pin 10. In order to prevent the function of the pressure relief valve 1 from being impaired even if a relative rotation of the valve body 3 and the valve carrier 4 takes place, the stop 11 and the counter-stop 12 are each formed as a circumferential or preferably segmented ring flange or ring projection.

Both the stop 11 provided on the inner circumference of the retaining sleeve 9 and the mating stop 12 provided on the outer circumference of the retaining pin 10 have sloping ramps or sloping flanks 14, 15 which taper towards the free end-side ends of the retaining sleeve 9 or retaining pin 10. Fig. 1 shows that a stop 11 provided on the retaining sleeve 9 and a mating stop 12 projecting laterally on the retaining pin 10 engage behind one another in such a way that the valve body 3 and the valve carrier 4 are held against one another before being fitted into the valve housing 2 of the pressure-reducing valve 1.

As can be seen from fig. 4, the valve support 4 has a valve support section 16, which valve support section 16 bears axially fixedly against the housing inner circumference of the valve housing 2 and is held in the use position of the pressure-reducing valve 1 in the housing interior of the valve housing 2 so as to be immovable. The valve support section 16 is substantially disk-shaped.

The valve support 4 has a guide section 17, on which guide section 17 the valve body 3 is guided with its valve body inner circumference in a movable manner. This guide section 17 of the valve support 4 has a retaining sleeve or, as here, a retaining pin 10 on its end face oriented toward the interior of the valve body.

In order to allow the fluid flowing through the pressure relief valve 1 to pass only through the at least one flow duct 5, an annular seal 18 is provided on the valve body section 16, with which annular seal the valve body section 16 rests sealingly against the housing inner periphery of the valve housing 2. An annular seal 19 is also provided on the guide section 17 of the valve support 4, which seals the pot interior of the pot-shaped valve body 3 against the flowing fluid. In this case, the annular seal 19 bears sealingly against the inner can circumference of the valve body 3. As can be seen from a comparison of fig. 1, 2 and 4, the valve body section 16 and the guide section 17 of the valve support 4 are connected by a connecting section 20. The at least one passage opening 8 of the flow channel 5 is provided here on this connection section 20. The connecting section 20 is configured to have a contour or a diameter such that the passage opening 8 is closed off by the can inner wall of the can-shaped valve body 3 in the closed position of the pressure relief valve 1.

As is evident from a comparison of fig. 1, 2 and 4, at least one sliding element and four sliding elements 21 which are spaced apart from one another in a uniform manner in the circumferential direction are provided on the valve body 3 on the outer circumferential side and project beyond the valve body 3 in the radial direction in such a way that an annular channel 22 is formed between the housing inner circumference of the valve housing 2 on the one hand and the outer circumference of the valve body 3 on the other hand. Since the valve body 3 slides on the housing inner circumference of the valve housing 2 only with its laterally projecting sliding element 21, the friction surfaces of the valve body 3 are effectively reduced. In the open position of the valve 1, the sliding element 21 rests against a collar shoulder 30 on the housing inner circumference of the valve housing 2.

As is apparent from a comparison of fig. 1, 2 and 4, an annular groove 23 is provided on the outer circumference of the valve body section 16. The annular groove 23 is connected to the pot interior of the pot-shaped valve body 3 via at least one ventilation channel. At least one ventilation opening is provided in the valve housing 2 of the pressure reducing valve 1, said ventilation opening into the annular groove 23. During the displacement movement of the valve body 3, air trapped in the pot interior of the pot-shaped valve body 3 can escape through the ventilation channel and the ventilation opening. In this way: an undesirable back pressure can form in the tank interior of the valve body 3 when the pressure of the fluid on the outlet side presses the valve body 3 against the guide section 17 of the valve support 4.

The valve housing 2 has an internal thread 31 on its inlet side a and a complementary external thread 26 on its outlet side B. The valve housing 2 can be screwed, for example, with external threads 26 onto a hose connection of a flexible hose line in order to protect the flexible hose line against elevated pressures of the fluid and pressure-induced ruptures. If the valve support 4 is connected to the water inlet with an internal thread 31 arranged on its input side a, the valve support 4 is fixedly clamped with its valve support section 16 between a ring shoulder 27 arranged on the housing inner circumference of the valve housing 2 and the water inlet, not shown in detail here. In order to ensure that the water flowing through passes only in the region of the at least one flow channel 5, annular seals 18, 29 are provided on both sides of the valve support section 16. It is also possible for the pressure reducing valve shown here to be connected between the water connection on the input side and the on/off valve following the pressure reducing valve 1 in the flow direction, in order to prevent a further leakage of the primary pressure through the valve seat 17 onto the secondary side B of the discharge side of the pressure reducing valve 1 and in order to suppress a rupture of the line section provided between the pressure reducing valve 1 and the following on/off valve.

As can be seen in fig. 1 and 2, an annular space 37 is provided between the groove base 36 of the annular groove 32 and the lip-shaped formation 35 on the sealing ring 18, said annular space communicating with the inlet side of the pressure relief valve 1. In order to make it possible for the annular space 37 to communicate with the input side a of the pressure relief valve 1, at least one pressure compensation duct 38 can be provided in the region of the annular groove 32, which is represented in fig. 1 by a dashed line in the region of the groove flank 33 and communicates with the input side of the pressure relief valve 1.

However, according to a preferred embodiment of the invention, which is illustrated by a solid line in fig. 1 to 5, it is provided that at least one recess 39 or a recessed formation is provided on the end-side edge of the sealing lip-shaped formation 35 facing the valve body 3, which recess or recessed formation fluidically connects the annular space 37 to an annular gap 40 remaining between the valve support 4 and the valve body 3 in the closed position of the pressure-reducing valve 1.

As can be seen from the perspective bottom view of the sealing ring 18 shown in fig. 5, the front edge of the sealing lip-like formation 35 facing the valve body 3 is preferably formed in a crown shape and has a plurality of recesses 39 spaced apart from one another by a preferably uniform distance. The primary pressure prevailing on the input side a of the pressure reducing valve 1 can therefore penetrate into the annular space 37 via the annular gap 40 and the at least one recess 39 in such a way that, in the closed position of the pressure reducing valve 1, the sealing lip-shaped profile 35 provided on the sealing ring 18 is pressed elastically against the inner circumference of the pot-shaped valve body 3 against the inherent elasticity of the material used for the profile 35. This effectively prevents the primary pressure present on the inlet side a of the pressure relief valve 1 from penetrating through the valve seat 7 and also onto the secondary side B of the outlet side of the pressure relief valve 1 and also prevents pressure-induced ruptures of the line section provided on the outlet side B of the pressure relief valve 1.

List of reference numerals

1 pressure reducing valve

2 valve housing

3 valve body

4 valve support

5 flow-through channel

6 peripheral edge

7 valve support

8 channel opening

9 holding sleeve

10 holding pin

11 stop part

12 cooperation backstop

13 pressure spring

14 slope side

15 slope side

16 valve support section

17 guide section

18 sealing ring

19 sealing ring

20 connecting section

21 sliding element

22 annular channel

23 annular groove

26 external screw thread

27 ring shoulder

29 annular seal

30 ring shoulder

31 internal thread

32 ring groove

33 side of groove

34 groove side surface

35 formation of sealing lip

36 groove bottom

37 annular space

38 pressure compensating channel

39 depression

40 annular gap

Input side A

B discharge side