CN220354577U - Self-operated multistage pressure reducing valve - Google Patents
Self-operated multistage pressure reducing valve Download PDFInfo
- Publication number
- CN220354577U CN220354577U CN202321614449.8U CN202321614449U CN220354577U CN 220354577 U CN220354577 U CN 220354577U CN 202321614449 U CN202321614449 U CN 202321614449U CN 220354577 U CN220354577 U CN 220354577U
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- valve
- self
- pressure
- valve body
- valve core
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- 230000001603 reducing effect Effects 0.000 title claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 230000006837 decompression Effects 0.000 claims abstract description 18
- 230000004044 response Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 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
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses a self-operated multistage pressure reducing valve, which comprises a valve body; the valve is characterized by further comprising a first decompression mechanism and a second decompression mechanism which are arranged on the valve body; the first pressure reducing mechanism comprises a first pressure setting component and a valve rod connected with the first pressure setting component; the second pressure reducing mechanism comprises a second pressure setting component, a push rod connected with the second pressure setting component and a second valve core arranged on the push rod; the valve rod and the push rod are provided with self-balancing holes; and the valve body is detachably provided with a blank cap. The utility model reduces the influence of inlet pressure fluctuation on the pressure supply effect to the greatest extent by utilizing the first pressure reducing mechanism and the second pressure reducing mechanism; the self-balancing hole is utilized to carry out self-balancing on the first valve core and the second valve core, so that the first valve core and the second valve core are not influenced by inlet pressure, the response speed of the valve is accelerated, and the adjusting precision of the valve is improved.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a self-operated multistage pressure reducing valve.
Background
The pressure reducing valve reduces the inlet pressure to a certain required outlet pressure through adjustment, and the outlet pressure is automatically kept stable by means of the energy of a medium, in the prior art, when the conventional self-operated adjusting valve is used under the working conditions of large upstream pressure fluctuation range and large pressure difference, the valve core is influenced by the inlet pressure or outlet pressure change of the valve core to move, so that the sensitivity of the valve core is reduced, the accurate adjustment cannot be performed, the adjustment precision and the pressure reducing and stabilizing effect are reduced, and the use requirement of the on-site working condition cannot be met. For this purpose, a self-operated multi-stage pressure relief valve is proposed.
Disclosure of Invention
The utility model aims to solve the problems and provides a self-operated multi-stage pressure reducing valve.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a self-operated multi-stage pressure reducing valve comprises a valve body; the valve is characterized by further comprising a first decompression mechanism and a second decompression mechanism which are arranged on the valve body; the first pressure reducing mechanism comprises a first pressure setting component and a valve rod connected with the first pressure setting component; the second pressure reducing mechanism comprises a second pressure setting component, a push rod connected with the second pressure setting component and a second valve core arranged on the push rod; the valve rod and the push rod are provided with self-balancing holes; and the valve body is detachably provided with a blank cap.
Preferably, the first pressure setting assembly comprises a first housing arranged on the valve body with the blank cap, a piston movably arranged on the valve body, a first adjusting rod arranged on the first housing and a first spring pressing plate connected with the first adjusting rod; the piston is connected with the valve rod.
Preferably, a first pressure setting spring is installed between the first spring pressing plate and the piston; the valve rod is provided with a first valve core; a first pre-tightening spring is arranged between the first valve core and the blank cap.
Preferably, a diaphragm is installed between the valve body and the second pressure setting component; the diaphragm is provided with a connecting block; the push rod is connected with the connecting block; a second pre-tightening spring is arranged between the second valve core and the blank cap; the second valve core is also provided with a central through hole connected with the self-balancing hole on the push rod
Preferably, the second pressure setting assembly comprises a second housing mounted on the valve body, a spring seat movably mounted in the second housing, a second adjusting rod mounted on the second housing, a second spring pressing plate mounted on the second adjusting rod, and a second pressure setting spring mounted between the spring seat and the second spring pressing plate.
Preferably, a sleeve and a valve seat are sequentially arranged between the blank cap and the valve body; and the valve body is also provided with a medium inlet, a medium outlet and a medium connecting channel for connecting the first decompression mechanism and the second decompression mechanism.
The utility model has the beneficial effects that: the influence of inlet pressure fluctuation on the pressure supply effect is reduced to the greatest extent by utilizing the first pressure reducing mechanism and the second pressure reducing mechanism, and after one pressure reducing mechanism fails, the rest pressure reducing mechanism can limit the pressure of a medium to be under safe pressure, so that the constancy of subsequent process parameters is ensured;
the self-balancing hole is utilized to carry out self-balancing on the first valve core and the second valve core, so that the first valve core and the second valve core are not influenced by inlet pressure, the response speed of the valve is accelerated, and the adjusting precision of the valve is improved;
the valve body is processed into a split structure through the detachable mounting of the valve body, so that the valve seat can be replaced or maintained in the later period.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic partial structure of the first decompression mechanism of the present utility model.
Fig. 3 is a schematic partial structure of a second decompression mechanism of the present utility model.
Legend description: 1, a valve body; 101, a blank cap; 102 a sleeve; 103 valve seats; 104 medium inlet; 105 medium outlet; 106 connecting the medium channels; 2 a first pressure reducing mechanism; 201 a first pressure setting assembly; 202 a valve stem; 203 a first housing; 204 a piston; 205 a first adjustment lever; 206 a first spring platen; 207 a first pressure setting spring; 208 a first valve spool; 209 a first preload spring; 3 a second pressure reducing mechanism; 301 a second pressure setting assembly; 302 push rod; 303 a second spool; 304 a second preload spring; 305 a central through hole; 306 a second housing; 307 spring seats; 308 a second adjustment lever; 309 a second spring platen; a second pressure setting spring 310; 4, self-balancing holes; 5 a membrane; 501 connection blocks.
Detailed Description
The utility model relates to a self-operated multi-stage pressure reducing valve, which is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, a self-operated multi-stage pressure reducing valve in this embodiment includes a valve body 1; the valve is characterized by further comprising a first decompression mechanism 2 and a second decompression mechanism 3 which are arranged on the valve body 1; the first pressure reducing mechanism 2 comprises a first pressure setting assembly 201 and a valve rod 202 connected with the first pressure setting assembly 201; the second pressure reducing mechanism 3 comprises a second pressure setting assembly 301, a push rod 302 connected with the second pressure setting assembly 301, and a second valve core 303 installed on the push rod 302; the valve rod 202 and the push rod 302 are provided with self-balancing holes 4; the valve body 1 is detachably provided with a blank cap 101; the influence of inlet pressure fluctuation on the pressure supply effect is reduced to the greatest extent by utilizing the first pressure reducing mechanism 2 and the second pressure reducing mechanism 3, and after one pressure reducing mechanism fails, the rest pressure reducing mechanism can limit the pressure of a medium to be under safe pressure so as to ensure the constancy of subsequent process parameters; by utilizing the self-balancing holes 4 to self-balance the first valve core 208 and the second valve core 303, the first valve core 208 and the second valve core 303 are not influenced by inlet pressure, the response speed of the valve is accelerated, and the adjusting precision of the valve is improved; the valve body 1 is processed into a split structure through the detachable mounting of the cover 101 of the valve body 1, so that the valve seat 103 can be replaced or maintained at a later stage.
Referring to fig. 1-3, the first pressure setting assembly 201 includes a first housing 203 mounted on the valve body 1 with the cover 101, a piston 204 movably mounted on the valve body 1, a first adjusting lever 205 mounted on the first housing 203, and a first spring pressing plate 206 connected to the first adjusting lever 205; the piston 204 is connected with the valve rod 202; a first pressure setting spring 207 is installed between the first spring pressing plate 206 and the piston 204; the valve rod 202 is provided with a first valve core 208; a first pre-tightening spring 209 is installed between the first valve core 208 and the blank cap 101; through entering the valve body 1 a part of medium enters the self-balancing hole 4 on the valve rod 202, and flows to the space between the blank cap 101 and the bottom of the valve rod 202 to generate upward force to the first valve core 208, and meanwhile, the medium on the upper part of the first valve core 208 generates downward force to the first valve core 208 to self-balance the first valve core 208, so that the first valve core 208 is not influenced by inlet pressure, the response speed of the valve is accelerated, and the adjusting precision of the valve is improved.
Referring to fig. 1-3, a diaphragm 5 is installed between the valve body 1 and the second pressure setting assembly 301; a connecting block 501 is arranged on the diaphragm 5; the push rod 302 is connected with the connecting block 501; a second pre-tightening spring 304 is arranged between the second valve core 303 and the blank cap 101; the second valve core 303 is further provided with a central through hole 305 connected with the self-balancing hole 4 on the push rod 302; the second pressure setting assembly 301 includes a second housing 306 mounted on the valve body 1, a spring seat 307 movably mounted in the second housing 306, a second adjustment rod 308 mounted on the second housing 306, a second spring pressing plate 309 mounted on the second adjustment rod 308, and a second pressure setting spring 310 mounted between the spring seat 307 and the second spring pressing plate 309; a sleeve 102 and a valve seat 103 are sequentially arranged between the blank cap 101 and the valve body 1; the valve body 1 is also provided with a medium inlet 104, a medium outlet 105 and a medium connecting channel 106 for connecting the first decompression mechanism 2 and the second decompression mechanism 3; the medium enters the self-balancing hole 4 on the push rod 302 and flows to the position between the blank cap 101 and the bottom of the second valve core 303 through the central through hole 305 on the second valve core 303 to generate upward force on the second valve core 303, and meanwhile, the medium on the upper part of the second valve core 303 generates downward force on the second valve core 303 to self-balance the second valve core 303, so that the second valve core 303 is not influenced by inlet pressure, the response speed of the valve is accelerated, and the adjustment precision of the valve is improved; by adopting the rubber diaphragm as the detection element through the diaphragm 5, the action of the actuating mechanism drives the push rod 302 and the second valve core 303 to move up and down, and meanwhile, the sealing effect is achieved between the valve body 1 and the second pressure reducing mechanism 301, so that the packing-free design of the whole valve is realized, the return difference is reduced, and the regulation performance of the whole valve is improved.
In the utility model, medium enters the valve body 1 through the medium inlet 104 on the valve body 1, so that the inlet pressure of the valve body 1 is increased, the medium pushes the first valve core 208 to move downwards, the first valve core 208 drives the valve rod 202 to move downwards, the first pre-tightening spring 209 compresses, the valve rod 202 drives the piston 204 to move downwards, part of the medium enters the self-balancing hole 4 on the valve rod 202, upward force is generated on the first valve core 208 when flowing to the space between the cover 101 and the bottom of the valve rod 202, downward force is generated on the first valve core 208 by the medium on the upper part of the first valve core 208, self-balancing is performed on the first valve core 208, the opening degree of the first valve core 208 is kept, the medium decompressed by the first decompression mechanism 2 flows to the second decompression mechanism 3 through the connecting medium channel 106, the inlet pressure at the second valve core 303 is increased, the medium pushes the second valve core 303 to move downwards, the second valve core 303 drives the push rod 302 to move downwards, the second pre-tightening spring 304 is compressed, the push rod 302 drives the connecting block 501 to move downwards, the connecting block 501 drives the diaphragm 5 to move downwards, part of the medium enters the self-balancing hole 4 on the push rod 302 and flows to the position between the blank cap 101 and the bottom of the second valve core 303 through the central through hole 305 on the second valve core 303 to generate an upward force on the second valve core 303, the medium at the upper part of the second valve core 303 generates a downward force on the second valve core 303 to perform self-balancing on the second valve core 303, and the medium flows out of the medium outlet 105 after being subjected to secondary pressure reduction; conversely, when the outlet pressure is greater than the set value, the opening degrees of the first spool 208 and the second spool 303 are reduced, so that the outlet pressure is stabilized near the set value.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
Claims (6)
1. A self-operated multi-stage pressure reducing valve, which comprises a valve body (1); the valve is characterized by further comprising a first decompression mechanism (2) and a second decompression mechanism (3) which are arranged on the valve body (1); the first pressure reducing mechanism (2) comprises a first pressure setting assembly (201) and a valve rod (202) connected with the first pressure setting assembly (201); the second pressure reducing mechanism (3) comprises a second pressure setting assembly (301), a push rod (302) connected with the second pressure setting assembly (301) and a second valve core (303) arranged on the push rod (302); the valve rod (202) and the push rod (302) are provided with self-balancing holes (4); and the valve body (1) is detachably provided with a blank cap (101).
2. A self-contained multi-stage pressure relief valve as set forth in claim 1 wherein: the first pressure setting assembly (201) comprises a first housing (203) arranged on the valve body (1) provided with the blank cap (101), a piston (204) movably arranged on the valve body (1), a first adjusting rod (205) arranged on the first housing (203) and a first spring pressing plate (206) connected with the first adjusting rod (205); the piston (204) is connected to the valve stem (202).
3. A self-contained multi-stage pressure relief valve as set forth in claim 2 wherein: a first pressure setting spring (207) is arranged between the first spring pressing plate (206) and the piston (204); a first valve core (208) is arranged on the valve rod (202); a first pre-tightening spring (209) is arranged between the first valve core (208) and the blank cap (101).
4. A self-contained multi-stage pressure relief valve as set forth in claim 1 wherein: a diaphragm (5) is arranged between the valve body (1) and the second pressure setting assembly (301); a connecting block (501) is arranged on the diaphragm (5); the push rod (302) is connected with the connecting block (501); a second pre-tightening spring (304) is arranged between the second valve core (303) and the blank cap (101); the second valve core (303) is also provided with a central through hole (305) connected with the self-balancing hole (4) on the push rod (302).
5. A self-contained multi-stage pressure relief valve as set forth in claim 4 wherein: the second pressure setting assembly (301) comprises a second housing (306) mounted on the valve body (1), a spring seat (307) movably mounted in the second housing (306), a second adjusting rod (308) mounted on the second housing (306), a second spring pressing plate (309) mounted on the second adjusting rod (308), and a second pressure setting spring (310) mounted between the spring seat (307) and the second spring pressing plate (309).
6. A self-contained multi-stage pressure relief valve as set forth in claim 1 wherein: a sleeve (102) and a valve seat (103) are sequentially arranged between the blank cap (101) and the valve body (1); the valve body (1) is also provided with a medium inlet (104), a medium outlet (105) and a medium connecting channel (106) for connecting the first decompression mechanism (2) and the second decompression mechanism (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321614449.8U CN220354577U (en) | 2023-06-25 | 2023-06-25 | Self-operated multistage pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321614449.8U CN220354577U (en) | 2023-06-25 | 2023-06-25 | Self-operated multistage pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220354577U true CN220354577U (en) | 2024-01-16 |
Family
ID=89484613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321614449.8U Active CN220354577U (en) | 2023-06-25 | 2023-06-25 | Self-operated multistage pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220354577U (en) |
-
2023
- 2023-06-25 CN CN202321614449.8U patent/CN220354577U/en active Active
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