CN203836300U - Lifting type silent check valve - Google Patents
Lifting type silent check valve Download PDFInfo
- Publication number
- CN203836300U CN203836300U CN201420251330.3U CN201420251330U CN203836300U CN 203836300 U CN203836300 U CN 203836300U CN 201420251330 U CN201420251330 U CN 201420251330U CN 203836300 U CN203836300 U CN 203836300U
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- China
- Prior art keywords
- valve
- piston
- cavity
- valve body
- piston cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model relates to a lifting type silent check valve which comprises a valve body, a valve clack and a valve cover. A valve seat matched with a sealing face of the valve clack is manufactured in an inner cavity of the valve body, a piston cylinder is manufactured in an outlet cavity of the valve body, a piston in movable sealing fit with the piston cylinder is connected to the back face of the valve clack, and a spring is installed in a piston cavity formed by the piston and the piston cylinder. A through hole for being communicated with the piston cavity and an outlet channel of the valve body is formed in the piston, and a check valve body for circulation from the piston cavity to the outlet channel of the valve body is installed in the through hole; an adjusting plate is installed on the valve cover, the lower end face of the adjusting plate is in contact with the upper end of the spring in an abutting-against mode, an escape hole for being communicated with the piston cavity and the lower end face of the valve cover is formed in the adjusting plate, and an escape valve is installed on the valve cover and is a one-way valve for circulation from the outer side of the valve cover to the piston cavity. The lifting type silent check valve has the advantages of being low in starting-closing noise, reliable in sealing performance, long in service life of the product and the like. The lifting type silent check valve is suitable for check valves for preventing pipe medium backflow of city central heating systems.
Description
Technical field
The utility model belongs to valve field, particularly about a kind of safety check.The utility model is applicable to the safety check that urban district heating system prevents that pipeline medium from flowing backwards.
Background technique
Lift check valve is comprised of valve body, valve gap, flap, the valve seat cooperatively interacting at body cavity manufacture and valve clack sealing surface, and forward pressure medium promotes flap and opens, and during reverse media pressure, flap is closed, and prevents from that medium from flowing backwards to damage system equipment.Its major defect is that flap cracking pressure, keying speed are unadjustable, and while closing, flap and valve seat impact force are large, opens and closes noise large, and fragile sealing surface affects sealability and product working life.
Summary of the invention
The purpose of this utility model is the shortcoming existing for prior art, provides a kind of and opens and closes that noise is low, sealability reliable, the rise-fall type DRV of long product lifecycle.
The technical solution of the utility model comprises valve body, flap, valve gap, body cavity is shaped with the valve seat cooperatively interacting with valve clack sealing surface, in valve outlet cavity, be shaped with piston cylinder, the flap back side connects a piston coordinating with piston cylinder motive sealing, mounting spring in the piston cavity that piston and piston cylinder form; Be mainly on piston, to be shaped with the through hole that is communicated with piston cavity and valve outlet passage, the one-way valve to the circulation of valve outlet passage by piston cavity is installed in through hole; Regulator plate is installed on valve gap, and the lower end surface of this regulator plate and spring upper end contact, and are shaped with the escape orifice that is communicated with piston cavity and valve gap lower end surface on regulator plate, and bleeder valve is installed on valve gap, and this bleeder valve is the safety check of valve gap lateral piston cavity circulation.
The utility model has the advantages that on piston the one-way valve to the circulation of valve outlet passage by piston cavity is installed, by the opening speed of adjusting flap that arranges of one-way valve quantity; Regulator plate is installed on valve gap, by the pressure of this regulator plate Regulation spring, is adjusted the cracking pressure of flap; Bleeder valve is installed on valve gap, by bleeder valve parameter, is arranged, set the Slow Close speed of flap.There is the features such as the noise of keying is low, sealability reliable, long product lifecycle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Rise-fall type DRV as shown in Figure 1, comprise valve body 1, flap 2, valve gap, valve body 1 inner chamber is shaped with the valve seat cooperatively interacting with flap 2 sealing surfaces, in valve body 1 outlet cavity, be shaped with piston cylinder 7, flap 2 back sides connect a piston coordinating with piston cylinder 7 motive sealings, between piston and piston cylinder 7, adopt 4 sealings of O type circle, mounting spring 6 in the piston cavity that piston and piston cylinder 7 form; On piston, be shaped with the through hole that is communicated with piston cavity and valve body 1 outlet passage, the one-way valve 5 to valve body 1 outlet passage circulation by piston cavity is installed in through hole, be that one-way valve 5 imports are communicated with piston cavity, outlet is communicated with valve body 1 outlet passage, make medium from piston cavity to valve body 1 outlet passage one-way flow, on piston, around circumferencial direction, several through holes are evenly set, keep the balance of piston, the quantity of one-way valve 5 need to be set according to flap 2 opening speeds, in all the other through holes, adopt plug screw 3 to stop up; Regulator plate 8 is installed on valve gap, the lower end surface of this regulator plate 8 and spring 6 upper ends contact, regulator plate 8 is threaded with valve gap, by regulator plate 8, adjust the compressive force of spring 6, set the cracking pressure of flap 2, regulator plate 8 is locked on valve gap by locking nut 12, and regulator plate 8 upper ends connect lifting bolt 13.On regulator plate 8, be shaped with the escape orifice that is communicated with piston cavity and valve gap lower end surface, bleeder valve 11 is installed on valve gap, this bleeder valve 11 is the safety check of valve gap lateral piston cavity circulation, and check valve inlet is communicated with the atmosphere in valve gap outside, and outlet is communicated with piston cavity, when flap 2 is closed, ambient atmos compensates in piston cavity, control the Slow Close speed of flap 2, reduce the shock of flap 2 and valve seat, reduce and open and close noise, improve sealability, extend product working life.Valve gap is fixedly mounted on valve body 1 by bolt 10, nut 13, and piston cylinder 7 upper end sealing pressings are contained between valve gap and valve body 1, between piston cylinder 7 and valve body 1, sealing gasket 9 are set.
Claims (1)
1. a rise-fall type DRV, comprise valve body (1), flap (2), valve gap, valve body (1) inner chamber is shaped with the valve seat cooperatively interacting with flap (2) sealing surface, in valve body (1) outlet cavity, be shaped with piston cylinder (7), flap (2) back side connects a piston coordinating with piston cylinder (7) motive sealing, mounting spring (6) in the piston cavity that piston and piston cylinder (7) form; It is characterized in that being shaped with the through hole that is communicated with piston cavity and valve body (1) outlet passage on piston, the one-way valve (5) to the circulation of valve body (1) outlet passage by piston cavity is installed in through hole; Regulator plate (8) is installed on valve gap, the lower end surface of this regulator plate (8) and spring (6) upper end contact, on regulator plate (8), be shaped with the escape orifice that is communicated with piston cavity and valve gap lower end surface, bleeder valve (11) is installed on valve gap, and this bleeder valve (11) is the safety check of valve gap lateral piston cavity circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420251330.3U CN203836300U (en) | 2014-05-04 | 2014-05-04 | Lifting type silent check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420251330.3U CN203836300U (en) | 2014-05-04 | 2014-05-04 | Lifting type silent check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836300U true CN203836300U (en) | 2014-09-17 |
Family
ID=51514142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420251330.3U Expired - Fee Related CN203836300U (en) | 2014-05-04 | 2014-05-04 | Lifting type silent check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203836300U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066048A (en) * | 2020-09-16 | 2020-12-11 | 邵玉强 | Slow-closing check valve |
| CN114811120A (en) * | 2022-06-07 | 2022-07-29 | 天津卡尔斯阀门股份有限公司 | Anti-drip opening and closing buffering check valve |
| CN116006732A (en) * | 2022-12-28 | 2023-04-25 | 兰州高压阀门有限公司 | A quick valve with medium automatic non-return function |
| CN118049515A (en) * | 2024-03-12 | 2024-05-17 | 苏州纽威阀门股份有限公司 | A check valve with adjustable opening and closing pressure |
-
2014
- 2014-05-04 CN CN201420251330.3U patent/CN203836300U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066048A (en) * | 2020-09-16 | 2020-12-11 | 邵玉强 | Slow-closing check valve |
| CN114811120A (en) * | 2022-06-07 | 2022-07-29 | 天津卡尔斯阀门股份有限公司 | Anti-drip opening and closing buffering check valve |
| CN114811120B (en) * | 2022-06-07 | 2025-03-14 | 天津卡尔斯阀门股份有限公司 | A drip-proof opening and closing buffer check valve |
| CN116006732A (en) * | 2022-12-28 | 2023-04-25 | 兰州高压阀门有限公司 | A quick valve with medium automatic non-return function |
| CN118049515A (en) * | 2024-03-12 | 2024-05-17 | 苏州纽威阀门股份有限公司 | A check valve with adjustable opening and closing pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 |