CN219866472U - Direct-acting pressure reducing valve - Google Patents
Direct-acting pressure reducing valve Download PDFInfo
- Publication number
- CN219866472U CN219866472U CN202321273139.4U CN202321273139U CN219866472U CN 219866472 U CN219866472 U CN 219866472U CN 202321273139 U CN202321273139 U CN 202321273139U CN 219866472 U CN219866472 U CN 219866472U
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- valve rod
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- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses a direct-acting pressure reducing valve, which comprises a valve body, a valve cover, a spring, a valve seat, a lower end cover and an operation assembly, wherein the valve cover and the valve seat are respectively arranged on two opposite sides of the valve body, one end of the valve cover, which is far away from the valve body, is provided with an adjusting screw, the adjusting screw penetrates through the valve cover and is connected with the spring, the lower end cover is in sealing connection with the valve body at one end of the valve seat, which is far away from the valve body, the operation assembly is positioned in a valve cavity and comprises a coaxially arranged diaphragm, a diaphragm pressing plate, a valve rod, a valve clack and a valve rod screw, wherein the valve rod penetrates through the diaphragm and the diaphragm pressing plate in sequence, the outer edge of the diaphragm is clamped between the valve cover and the valve body, and the position, which is close to the center, of the diaphragm is clamped and fixed by the valve rod seat and the diaphragm pressing plate of the valve rod, and the valve clack are coaxially connected with the valve rod at one end, which is far away from the valve cover. The direct-acting pressure reducing valve provided by the utility model has the advantages that the stress areas of the diaphragm and the valve clack are more, and the control pressure sensing is more sensitive.
Description
Technical Field
The utility model relates to the technical field of pressure reducing valve equipment, in particular to a direct-acting pressure reducing valve.
Background
At present, a common direct-acting pressure reducing valve in the market is generally a piston type pressure reducing valve, as shown in fig. 1, the direct-acting pressure reducing valve comprises a valve body 1, a valve cover 2, a valve core 3, an adjusting screw 4 and a spring 5, when the pressure in a pipeline fluctuates and the pressure at the outlet end of the valve is low, the upward acting hydraulic pressure on a stress surface S1 of the valve core is reduced, the spring 5 rebounds to press the valve core 3 to move downwards, so that the opening degree of the valve is increased, the liquid at the inlet end of the valve flows to the outlet end more easily, and the pressure at the outlet end is complemented and maintained;
conversely, when the pressure at the outlet end of the valve becomes high, the hydraulic pressure acting upwards on the stress surface S1 of the valve core 3 increases, the spring 5 is further compressed upwards, so that the opening degree of the valve becomes smaller, the liquid at the inlet end of the valve is slowed down or even prevented from flowing to the outlet end, and the pressure at the outlet end is reduced to be maintained.
In the prior art, the bottom of the valve core is used as the acting surface of the back pressure of the induction valve, which is only slightly larger than the flow passage area of the valve body, the induction area is smaller, relatively speaking, the relatively obvious acting hydraulic pressure change can be displayed only when the great valve back pressure change occurs, so as to counter the elastic potential energy of the spring, otherwise, the spring does not have action change, in other words, the induction sensitivity of the conventional piston type direct-acting pressure reducing valve is lower;
and secondly, a small clearance fit relationship is formed between the valve core and the guide bushing, and fine impurities in the liquid are easy to block a small clearance for operation, so that the valve core can not operate smoothly up and down, and the normal use of the pressure reducing valve is easy to influence.
Disclosure of Invention
In order to solve at least one technical problem, the utility model provides a direct-acting pressure reducing valve, which comprises a valve body, a valve cover, a spring, a valve seat and a lower end cover, wherein the valve cover and the valve seat are respectively arranged on two opposite sides of the valve body, one end of the valve cover, which is far away from the valve body, is provided with an adjusting screw, which penetrates through the valve cover and is connected with the spring, the lower end cover is in sealing connection with the valve body at one end of the valve seat, which is far away from the valve body, wherein the direct-acting pressure reducing valve further comprises an operating assembly, which is positioned in a valve cavity formed by wrapping the valve body and the valve cover, and comprises a diaphragm, a diaphragm pressing plate, a valve rod, a valve clack and a valve rod screw, wherein the valve rod sequentially penetrates through the diaphragm and the diaphragm pressing plate and is coaxially connected with the spring, the outer edge of the diaphragm is clamped and arranged between the valve cover and the valve body, the valve rod seat and the diaphragm pressing plate are clamped and fixed at the position close to the center, and the valve rod is positioned at one end far away from the valve cover and coaxially penetrates through the valve rod.
According to one embodiment of the utility model, a lock nut is sleeved at one end of the valve rod, which is close to the spring, and the lock nut is positioned in the spring, so that the spring is directly abutted against the surface of the diaphragm pressing plate.
According to an embodiment of the present utility model, the diaphragm pressing plate has a connecting surface and an abutting surface opposite to each other, wherein the connecting surface is close to the diaphragm, and the abutting surface is close to the spring, and an area of the abutting surface is smaller than an area of the connecting surface and larger than an axial area of the spring.
According to an embodiment of the utility model, a gasket is further arranged between the lock nut and the diaphragm pressing plate, and the gasket is sleeved on the valve rod.
According to one embodiment of the utility model, the lower end cover is provided with a guide groove matched with the valve rod screw along the extending direction of the spring.
According to one embodiment of the utility model, one end of the adjusting screw, which is close to the spring, is vertically connected with a spring supporting plate, and the spring supporting plate is concentrically connected between the adjusting screw and the spring.
According to one embodiment of the utility model, the end of the spring supporting plate, which is close to the spring, is provided with a circular arc-shaped protruding structure at the center, wherein the circular arc-shaped protruding structure is matched with the inner cavity of the spring.
According to one embodiment of the utility model, one end of the valve clack, which is close to the side wall of the valve rod, is provided with a square bayonet, and the valve rod is at least partially embedded in the bayonet.
These and other objects, features and advantages of the present utility model will become more fully apparent from the following detailed description.
Drawings
Fig. 1 is a schematic cross-sectional view showing a direct-acting pressure reducing valve in the prior art of the present utility model.
FIG. 2 is a schematic cross-sectional view of a direct-acting pressure reducing valve according to a preferred embodiment of the present utility model.
Fig. 3 shows a schematic cross-sectional view of the running gear according to the utility model on the other side.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the disclosure of the present specification, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 2 and 3, a direct-acting pressure reducing valve according to a preferred embodiment of the present utility model will be described in detail below, wherein the direct-acting pressure reducing valve comprises a valve body 10, a valve cover 20, a spring 30, a valve seat 40, a lower end cap 50, and an operating assembly, wherein the valve cover 20 and the valve seat 40 are disposed at opposite sides of the valve body 10, respectively, and an end of the valve cover 20 remote from the valve body 10 is provided with an adjusting screw 21, wherein the adjusting screw 21 penetrates the valve cover 20 and is connected with the spring 30 in a co-directional and concentric manner, wherein the lower end cap 50 is connected with the valve body 10 at an end of the valve seat 40 remote from the valve body 10 in a sealing manner;
in addition, the operation assembly is located in a valve cavity 101 formed by wrapping the valve body 10 and the valve cover 20, and comprises a diaphragm 61, a diaphragm pressing plate 62, a valve rod 63, a valve clack 64 and a valve rod screw 65 which are coaxially arranged, wherein the valve rod 63 sequentially penetrates through the diaphragm 61 and the diaphragm pressing plate 62 and is coaxially connected with the spring 30, the outer edge of the diaphragm 61 is clamped between the valve cover 20 and the valve body 10, the position, close to the center, of the diaphragm 61 is clamped and fixed by a valve rod seat 631 of the valve rod 63 and the diaphragm pressing plate 62, and one end, far away from the valve cover 20, of the valve rod 63 of the valve rod screw 65 penetrates through the valve rod 63 and is coaxially connected with the valve clack 64 located in the valve rod 63.
Fluid enters the valve body 10 from the left side and flows out from the right side, wherein the function of the direct-acting pressure reducing valve is to automatically adjust and maintain the pressure at the outlet end;
when pressure fluctuation occurs in the pipeline, so that the pressure of the outlet end of the valve becomes low, the acting hydraulic force on the stressed areas of the valve clack 64 and the membrane 61 is correspondingly reduced, the spring 30 rebounds to press the valve clack 64 to move downwards, the opening degree of the valve becomes large, and the liquid at the inlet end of the valve flows to the outlet end more easily to supplement the pressure of the outlet end;
conversely, when the pressure at the outlet end of the valve becomes high, the acting hydraulic pressure on the stressed areas of the valve clack 64 and the diaphragm 61 is correspondingly increased, the spring 30 is further compressed, and the valve clack 64 is driven to move upwards, so that the opening degree of the valve becomes smaller, and the liquid at the inlet end of the valve can be prevented from flowing to the outlet end, so that the pressure at the outlet end is reduced;
furthermore, the compression degree of the spring 30 is adjustable based on the screwing depth of the adjusting screw 21, thereby facilitating the adjustment of the pressure at the outlet end of the valve.
According to the direct-acting pressure reducing valve provided by the utility model, the controlled pressure behind the valve can act on the diaphragm 61 and the valve clack 64 at the same time, so that the stress area of the valve can be greatly increased relative to that of a traditional valve core, and once the tiny pressure change occurs at the rear outlet end of the valve, the pressure can be timely sensed, and the sensitivity of the direct-acting pressure reducing valve is further effectively improved.
In one embodiment, the end of the valve rod 63 near the spring 30 is sleeved with a lock nut 632, wherein the lock nut 632 is located in the spring 30, such that the spring 30 can directly abut against the surface of the diaphragm pressing plate 62, thereby effectively fastening the diaphragm 61 through the fit relationship between the lock nut 632 and the valve rod 63, and facilitating the assembly of the diaphragm 61, the diaphragm pressing plate 62 and the valve rod 63.
In one embodiment, the diaphragm pressure plate 62 has an opposite connection surface and an abutment surface, wherein the connection surface is adjacent to the diaphragm 61 and the abutment surface is adjacent to the spring 30, wherein the abutment surface has an area smaller than the connection surface and larger than the axial area of the spring 30, thereby reducing the weight of the diaphragm pressure plate 62 to some extent and saving material while ensuring good support for the diaphragm 61.
Further preferably, a gasket 633 is further disposed between the lock nut 632 and the diaphragm pressing plate 62, wherein the gasket 633 is sleeved on the valve rod 63 to ensure the installation stability of the lock nut 632.
In one embodiment, the lower end cap 50 is provided with a guide groove 501 matching with the valve rod screw 65 along the extending direction of the spring 30, so that when the valve clack 64 moves up and down, the valve clack 64 can be ensured to move more smoothly based on the matching of the valve rod screw 65 and the guide groove 501, the valve clack is not easy to deviate from the central position, and the sealing with the valve seat 40 can be automatically righted when the valve clack is closed, so that the locking phenomenon is not easy to occur.
In one embodiment, a spring support plate 22 is vertically connected to an end of the adjusting screw 21 near the spring 30, wherein the spring support plate 22 is concentrically connected between the adjusting screw 21 and the spring 30, thereby increasing a contact area between the adjusting screw 21 and the spring 30 and ensuring operational stability of the spring 30.
Further preferably, the end of the spring support plate 22 near the spring 30 is provided with a circular arc-shaped protruding structure 23 at the center, wherein the circular arc-shaped protruding structure 23 is matched with the inner cavity of the spring 30, so that the contact area between the spring support plate 22 and the spring 30 can be further increased.
In one embodiment, the valve clack 64 is close to the square bayonet 641 is provided with to the one end of the lateral wall of valve rod 63, simultaneously, valve rod 63 at least partially inlays and establishes in the bayonet 641 for valve clack 64 with valve rod 63 laminating more easily, the manual tightening of being convenient for valve rod screw 65 need not additionally to use the spanner, and the operation is more convenient.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (8)
1. The utility model provides a direct acting relief pressure valve, includes valve body, valve gap, spring, disk seat and lower extreme cover, wherein the valve gap with the disk seat sets up respectively the both sides that the valve body is relative, the valve gap is kept away from the one end of valve body is provided with adjusting screw, adjusting screw runs through the valve gap and connects the spring, the lower extreme cover is in the one end sealing connection that the valve seat kept away from the valve body, wherein direct acting relief pressure valve still includes the operation subassembly, the operation subassembly is located the valve body with in the valve pocket that the valve gap surrounds the formation, including coaxial setting's diaphragm, diaphragm clamp plate, valve rod, valve clack and valve rod screw, wherein the valve rod runs through in proper order the diaphragm with coaxial coupling the diaphragm clamp plate, wherein the outer edge of diaphragm is pressed from both sides tightly to be set up between the valve gap with the valve body, just the diaphragm is close to central point department by the valve rod seat of valve rod with the clamp plate is pressed from both sides fixedly, wherein the valve rod screw is in the valve rod is kept away from the valve rod one end of valve gap runs through the valve rod, and coaxial coupling is located in the valve clack.
2. The direct-acting pressure reducing valve according to claim 1, wherein a lock nut is sleeved on one end of the valve rod, which is close to the spring, and the lock nut is positioned in the spring, so that the spring directly abuts against the surface of the diaphragm pressing plate.
3. The direct-acting pressure relief valve of claim 2 wherein said diaphragm pressure plate has opposed connection and abutment surfaces, wherein said connection surface is adjacent said diaphragm and said abutment surface is adjacent said spring, and wherein said abutment surface has an area that is less than an area of said connection surface and greater than an axial area of said spring.
4. The direct-acting pressure reducing valve according to claim 3, wherein a gasket is further arranged between the lock nut and the diaphragm pressing plate, and the gasket is sleeved on the valve rod.
5. The direct-acting pressure reducing valve according to claim 1, wherein the lower end cap is provided with a guide groove that mates with the stem screw in the extending direction of the spring.
6. The direct-acting pressure relief valve as defined in claim 1, wherein said adjusting screw has a spring support plate vertically connected to an end thereof adjacent said spring, said spring support plate being concentrically connected between said adjusting screw and said spring.
7. The direct-acting pressure reducing valve according to claim 6, wherein the end of the spring support plate near the spring is provided with a circular arc-shaped protruding structure at a central position, wherein the circular arc-shaped protruding structure is matched with the inner cavity of the spring.
8. The direct-acting pressure reducing valve according to claim 1, wherein one end of the valve clack, which is close to the side wall of the valve rod, is provided with a square bayonet, and the valve rod is at least partially embedded in the bayonet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273139.4U CN219866472U (en) | 2023-05-24 | 2023-05-24 | Direct-acting pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273139.4U CN219866472U (en) | 2023-05-24 | 2023-05-24 | Direct-acting pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219866472U true CN219866472U (en) | 2023-10-20 |
Family
ID=88339032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321273139.4U Active CN219866472U (en) | 2023-05-24 | 2023-05-24 | Direct-acting pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219866472U (en) |
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2023
- 2023-05-24 CN CN202321273139.4U patent/CN219866472U/en active Active
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