CN110822145A - Constant differential pressure compensating valve - Google Patents
Constant differential pressure compensating valve Download PDFInfo
- Publication number
- CN110822145A CN110822145A CN201911290983.6A CN201911290983A CN110822145A CN 110822145 A CN110822145 A CN 110822145A CN 201911290983 A CN201911290983 A CN 201911290983A CN 110822145 A CN110822145 A CN 110822145A
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- cylinder body
- differential pressure
- sealing gasket
- valve
- shaped
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- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a constant differential pressure compensation valve which comprises an upper cylinder body, a lower cylinder body, a differential pressure generator, a sealing gasket I, an O-shaped ring and a sunk screw, wherein the upper cylinder body is provided with a sealing gasket; the upper cylinder body is fixedly connected with the lower cylinder body, a sealing gasket I is arranged on the upper cylinder body, and an O-shaped ring is arranged on the lower cylinder body; the differential pressure generator is arranged on the screw rods in the upper cylinder body and the lower cylinder body; the valve seats of the upper cylinder body, the lower cylinder body and the differential pressure generator are all provided with guide holes for fixing the screw rod and ensuring that the valve seats move up and down on the screw rod. The invention reduces the fluctuation range of the pressure difference, and has the functions of automatically compensating the pressure, keeping the pressure difference and manually releasing the pressure in an emergency way.
Description
Technical Field
The invention relates to a constant differential pressure compensating valve for a fluid pressure transmission system.
Background
In a fluid pressure transmission system, different fixed pressures are required to be realized between two cavities, automatic adjustment is realized according to pressure fluctuation of the two cavities, constant pressure difference is kept, and the traditional method for adjusting different pressures by using two overflow valves has the defect of large pressure difference fluctuation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a constant-pressure differential pressure compensation valve which comprises an upper cylinder body, a lower cylinder body, a differential pressure generator, a sealing gasket I, an O-shaped ring and a sunk screw; the upper cylinder body is fixedly connected with the lower cylinder body, a sealing gasket I is arranged on the upper cylinder body, and an O-shaped ring is arranged on the lower cylinder body; the differential pressure generator is arranged on the screw rods in the upper cylinder body and the lower cylinder body; the valve seats of the upper cylinder body, the lower cylinder body and the differential pressure generator are all provided with guide holes for fixing the screw rod and ensuring that the valve seats move up and down on the screw rod.
Furthermore, a cavity formed by the upper cylinder body and the valve seat is an upper cavity.
Furthermore, a cavity formed by the lower cylinder body and the valve seat is a lower cavity.
Furthermore, the differential pressure generator consists of a large spring, a small spring, a valve seat, a sealing gasket II and an umbrella-shaped valve core; the large spring, the umbrella-shaped valve core and the sealing gasket II are sequentially arranged on the valve seat, and the small spring is arranged on the umbrella-shaped valve core.
Further, the umbrella-shaped valve core consists of an upper pressing sheet, a lower pressing sheet, a lip-shaped sealing gasket and a nut; the lip-shaped sealing gasket is fastened by an upper pressing sheet and a lower pressing sheet and is fixed on the screw rod by a nut.
Furthermore, a groove is formed between the valve seat and the large cylinder and the small cylinder in a stepped shaft structure and used for mounting a sealing gasket II, a stepped hole is formed in the valve seat, the large hole is used for mounting a large spring, the small hole is a guide hole, a strip waist-shaped groove is formed in the lower end face of the small hole, and the waist-shaped groove is a fluid passage of the upper cavity and the lower cavity.
The invention reduces the fluctuation range of the pressure difference, and has the functions of automatically compensating the pressure, keeping the pressure difference and manually releasing the pressure in an emergency way.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is an exploded view of the differential pressure generator of the present invention.
In the figure, 1, an upper cylinder body, 2, a lower cylinder body, 3, a pressure difference generator, 5, a sealing gasket I, 6, an umbrella-shaped valve core, 61, an upper pressing sheet, 62, a lower pressing sheet, 63, a lip-shaped sealing gasket, 64, a nut, 7, a small spring, 8, a sealing gasket II, 9, a valve seat, 10, a screw rod, 11, a large spring, 12, an O-shaped ring, 13, a sunk screw, 14, a waist-shaped groove, 15, a large hole, 16, a guide hole, 17, a guide hole and 18.
Detailed Description
As shown in figures 1 and 2, the constant-pressure differential pressure compensation valve comprises an upper cylinder body 1, a lower cylinder body 2, a differential pressure generator 3, a sealing gasket I5, an O-shaped ring 12 and a sunk screw 13. The upper cylinder body 1 and the lower cylinder body 2 are fixedly connected through a sunk screw 13, the O-shaped ring 12 is installed on the lower cylinder body 2, the differential pressure generator 3 is installed on a screw rod 10 inside the upper cylinder body and the lower cylinder body, and the sealing gasket I5 is installed on the upper cylinder body 1.
The upper end of the upper cylinder body 1 is externally provided with screw threads, the cylinder body is provided with 3 waist-shaped grooves 14, the interior of the upper cylinder body is of a hollow structure, a small hole is a guide hole 16 on the upper surface, a step hole is arranged on the lower surface, and the lower end and the interior of the upper cylinder body are connected through a flange.
The upper end of the lower cylinder body 2 is in flange connection, six holes are formed in the cylinder body, the interior of the cylinder body is of a hollow structure, a boss is arranged in the cylinder body, a guide hole 16 is formed in the boss, a small hole is drilled at the bottom of the boss, and an O-shaped ring groove is formed in the flange face of the upper end and used for installing an O-shaped ring 12.
The sealing gasket I5 is a circular gasket, is provided with an opening and is connected with the flange of the upper cylinder body 1.
The sealing gasket II 8 is a circular gasket, the middle of the sealing gasket is provided with a hole, and the sealing gasket II is arranged on the valve seat 9.
The upper pressing piece 61 is a circular washer with a hole in the middle.
The lower pressing plate 62 is a circular washer with a stepped hole in the middle.
The lip-shaped gasket 63 is of a cylindrical structure, has a stepped hole in the middle, and is lip-shaped on the upper surface.
The screw 10 has a stepped shaft structure, and a section of external threads is arranged below the stepped shaft structure and is used for connecting the nut 64.
As shown in fig. 3, the differential pressure generator 3 is composed of a large spring 11, a small spring 7, a valve seat 9, a seal gasket ii 8, and an umbrella-shaped valve core 6. The large spring 11, the umbrella-shaped valve core 6 and the sealing gasket II 8 are sequentially arranged on the valve seat 9, and the small spring 7 is arranged on the umbrella-shaped valve core 6. The umbrella-shaped valve core 6 consists of an upper pressing sheet 61, a lower pressing sheet 62, a lip-shaped sealing gasket 63, a nut 64 and a screw 10. The lip seal 63 is tightened by the upper pressing piece 61 and the lower pressing piece 62 and fixed to the screw 10 by a nut 64.
The valve seat 9 is in a stepped shaft structure, 1 groove is arranged between a large cylinder and a small cylinder and used for mounting a sealing gasket II 8, a stepped hole is formed in the valve seat, a large hole 15 is used for mounting a large spring 11, a small hole is a guide hole 16, and 3 waist-shaped grooves 14 are formed in the lower end face of the valve seat and used as fluid passages of an upper cavity and a lower cavity.
The cavity formed by the upper cylinder 1 and the valve seat 9 is an upper cavity, the pressure is P1, and the force-bearing area is A1.
The cavity formed by the lower cylinder 2 and the valve seat 9 is a lower cavity, the pressure is P2, and the force-bearing area is A2.
The pre-tightening pressure of the large spring 11 is F1, and the pre-tightening pressure of the small spring 7 is F2.
The large constant pressure valve is composed of a lower cylinder body 2, a sealing gasket II 8, a valve seat 9 and a large spring 11.
The small constant pressure valve is composed of a valve seat 9, an umbrella-shaped valve core and a small spring 7.
The lower chamber pressure P1 is determined by the pre-compression force F1 of the large spring and the force-bearing area a1 of the gasket ii 8.
The upper chamber pressure P2 is determined by the pre-compression force F2 of the small spring and the force-receiving area a2 of the lip seal 63.
1 small hole on the upper cylinder body 1, the guide hole of the lower cylinder body 2 and the small hole of the step hole on the valve seat 9, wherein the 3 holes are guide holes and are used for fixing the screw rod 10 and ensuring that the valve seat 9 moves up and down on the screw rod 10.
The screw 10 can be pushed by hand and is used for pushing the umbrella-shaped valve core 6 to release pressure manually in emergency.
The invention adopts the structural form of the upper cylinder body 1, the lower cylinder body 2 and the valve seat 9 to replace the traditional 2 overflow valves to set different pressures, thereby reducing the fluctuation range of differential pressure.
The specific embodiments are merely illustrative of the invention and are not intended to be limiting. The fluid in this embodiment refers to a mixture of gas, liquid and vapor-liquid.
Claims (6)
1. A constant differential pressure compensating valve is characterized in that: the device comprises an upper cylinder body, a lower cylinder body, a differential pressure generator, a sealing gasket I, an O-shaped ring and a countersunk head screw; the upper cylinder body is fixedly connected with the lower cylinder body, a sealing gasket I is arranged on the upper cylinder body, and an O-shaped ring is arranged on the lower cylinder body; the differential pressure generator is arranged on the screw rods in the upper cylinder body and the lower cylinder body; the valve seats of the upper cylinder body, the lower cylinder body and the differential pressure generator are all provided with guide holes for fixing the screw rod and ensuring that the valve seats move up and down on the screw rod.
2. A constant differential pressure compensating valve as defined in claim 1, wherein: the cavity formed by the upper cylinder body and the valve seat is an upper cavity.
3. A constant differential pressure compensating valve as defined in claim 1, wherein: the cavity formed by the lower cylinder body and the valve seat is a lower cavity.
4. A constant differential pressure compensating valve as defined in claim 1, wherein: the pressure difference generator consists of a large spring, a small spring, a valve seat, a sealing gasket II and an umbrella-shaped valve core; the large spring, the umbrella-shaped valve core and the sealing gasket II are sequentially arranged on the valve seat, and the small spring is arranged on the umbrella-shaped valve core.
5. A constant differential pressure compensating valve as defined in claim 1, wherein: the umbrella-shaped valve core consists of an upper pressing sheet, a lower pressing sheet, a lip-shaped sealing gasket and a nut; the lip-shaped sealing gasket is fastened by an upper pressing sheet and a lower pressing sheet and is fixed on the screw rod by a nut.
6. A constant differential pressure compensating valve as defined in claim 1, wherein: the valve seat is of a stepped shaft structure, a groove is formed between a large cylinder and a small cylinder and used for mounting a sealing gasket II, a stepped hole is formed in the valve seat, a large hole is used for mounting a large spring, a small hole is a guide hole, a strip waist-shaped groove is formed in the lower end face of the small hole, and the waist-shaped groove is a fluid channel of an upper cavity and a lower cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911290983.6A CN110822145B (en) | 2019-12-16 | 2019-12-16 | Constant differential pressure compensation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911290983.6A CN110822145B (en) | 2019-12-16 | 2019-12-16 | Constant differential pressure compensation valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110822145A true CN110822145A (en) | 2020-02-21 |
| CN110822145B CN110822145B (en) | 2024-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911290983.6A Active CN110822145B (en) | 2019-12-16 | 2019-12-16 | Constant differential pressure compensation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110822145B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113577474A (en) * | 2021-07-20 | 2021-11-02 | 杭州医学院 | Centralized oxygen supply monitoring system for hospital |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354427A2 (en) * | 1988-08-11 | 1990-02-14 | Milan Medvescek | Differential pressure control valve |
| CN103883770A (en) * | 2012-12-20 | 2014-06-25 | 武汉大禹阀门股份有限公司 | Lift type vacuum breaking valve |
| CN108480270A (en) * | 2018-02-28 | 2018-09-04 | 苏清凉 | A kind of roller type Chinese medicine continuous cleaning device |
| CN207941764U (en) * | 2018-01-08 | 2018-10-09 | 温州天炽包装有限公司 | A kind of mechanical workpieces surface cleaning apparatus |
| CN211145486U (en) * | 2019-12-16 | 2020-07-31 | 海门市中龙液压有限公司 | Constant differential pressure compensating valve |
-
2019
- 2019-12-16 CN CN201911290983.6A patent/CN110822145B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354427A2 (en) * | 1988-08-11 | 1990-02-14 | Milan Medvescek | Differential pressure control valve |
| CN103883770A (en) * | 2012-12-20 | 2014-06-25 | 武汉大禹阀门股份有限公司 | Lift type vacuum breaking valve |
| CN207941764U (en) * | 2018-01-08 | 2018-10-09 | 温州天炽包装有限公司 | A kind of mechanical workpieces surface cleaning apparatus |
| CN108480270A (en) * | 2018-02-28 | 2018-09-04 | 苏清凉 | A kind of roller type Chinese medicine continuous cleaning device |
| CN211145486U (en) * | 2019-12-16 | 2020-07-31 | 海门市中龙液压有限公司 | Constant differential pressure compensating valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113577474A (en) * | 2021-07-20 | 2021-11-02 | 杭州医学院 | Centralized oxygen supply monitoring system for hospital |
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| Publication number | Publication date |
|---|---|
| CN110822145B (en) | 2024-09-17 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: Group 18, Yunan Village, Yudong Town, Haimen District, Nantong City, Jiangsu Province, 226100 Applicant after: Nantong Zhonglong Hydraulic Co.,Ltd. Address before: 226100 Group 18, Yunan Village, Yudong Town, Nantong City, Jiangsu Province Applicant before: HAIMEN ZHONGLONG HYDRAULIC CO.,LTD. Country or region before: China |
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| GR01 | Patent grant |