CN203240024U - High-pressure dual-seal check valve - Google Patents
High-pressure dual-seal check valve Download PDFInfo
- Publication number
- CN203240024U CN203240024U CN 201320286932 CN201320286932U CN203240024U CN 203240024 U CN203240024 U CN 203240024U CN 201320286932 CN201320286932 CN 201320286932 CN 201320286932 U CN201320286932 U CN 201320286932U CN 203240024 U CN203240024 U CN 203240024U
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- CN
- China
- Prior art keywords
- valve
- pressure
- dual
- seal
- flap
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000005728 strengthening Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model relates to a high-pressure dual-seal check valve which comprises a valve body, a valve base, a valve deck and a valve clack. The valve clack is arranged on the valve body through a rocker, a connecting bar and a pin shaft, and plane sealing is adopted between the valve clack and the valve base. The high-pressure dual-seal check valve is characterized in that a dual-combined type seal structure is adopted in the valve base, the dual-combined type seal structure is composed of a reinforced polytetrafluoroethylene soft sealing ring and a metal sealing ring, and the reinforced polytetrafluoroethylene soft sealing ring is pressed into the metal sealing ring in an interference fit mode. The reinforced polytetrafluoroethylene soft sealing ring on the valve clack is matched with the valve base for sealing in low pressure, when the pressure is high, the reinforced polytetrafluoroethylene soft sealing ring is compressed, and the metal sealing ring on the valve clack is matched with the valve base for the sealing. The high-pressure dual-seal check valve has the advantages of being wide in range of application, good in high pressure sealing performance and lower pressure sealing performance and the like and is suitable for medium pipelines which is high in pressure and wide in pressure range.
Description
Technical field
The utility model relates to valve field, particularly about a kind of safety check.The utility model is applicable to the safety check on the wide medium pipeline of high pressure and pressure range.
Background technique
The structure of high pressure sealing safety check has the structural types such as spring, rotary-open type, Swing check valve is because of simple in structure, the little generally use on each medium transport pipeline of flow resistance, its structure generally is comprised of valve body, valve seat, valve gap, flap, flap is installed on the valve body by connecting rod and bearing pin, and flap and valve seat adopt the plane type metal sealing.Its major defect is that low pressure situation lower seal pair is not closed completely, and leaks easily the low pressure seal poor performance.
Summary of the invention
The purpose of this utility model is the shortcoming that exists for prior art, provides a kind of low pressure seal performance good high pressure dual-seal safety check.
The technical solution of the utility model comprises valve body, valve seat, valve gap, flap, flap is installed on the valve body by rocking bar, connecting rod and bearing pin, flap and valve seat adopt plane sealing, mainly be that flap adopts dual composite seal structure, described dual composite seal structure forms by strengthening polytetrafluoroethylene soft seal circle and metal o-ring, strengthens polytetrafluoroethylene soft seal circle and adopts in the force fit metal o-ring.
In above technological scheme, the sealing surface that strengthens polytetrafluoroethylene soft seal circle is higher than metal o-ring sealing surface 0.5-1 millimeter.
In above technological scheme, sealing surface of seat adopts built-up welding Si Taili material composition on valve body.
The utility model has the advantages that valve clack sealing surface adopts dual composite seal structure, during low pressure by enhancing polytetrafluoroethylene soft seal circle and valve seat fitted seal on the flap, it is compressed to strengthen polytetrafluoroethylene soft seal circle during high pressure, metal o-ring on the flap and valve seat fitted seal, its pressure Applicable scope is wide, the high and low pressure good seal performance.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is I place partial structurtes enlarged view among the utility model Fig. 1.
Embodiment
High pressure dual-seal safety check as shown in Figure 1, comprise valve body 1, valve seat 2, valve gap 13, flap 3, flap 3 is installed on the valve body 1 by rocking bar 4, connecting rod 8 and bearing pin 7, flap 3 adopts plane sealing with valve seat 2, flap 3 adopts dual composite seal structure, described dual composite seal structure forms by strengthening polytetrafluoroethylene soft seal circle 16 and metal o-ring 15, strengthens polytetrafluoroethylene soft seal circle 16 and adopts in the force fit metal o-ring 15.Enhancing polytetrafluoroethylene soft seal circle 16 fitted seal during low pressure on valve seat 2 and the flap 3, the metal o-ring 15 and valve seat 2 fitted seal of flap 3 during high pressure.Flap 3 is connected with set screw nut by hinge axis 5 and is connected with rocking bar 4, is fixedly mounted by bolt 9 and mounting nuts 10 between valve gap 13 and the valve body 1, between valve gap 13 and valve body 1 seal ring 12 is set, and valve gap 13 outer ends arrange suspension ring 14.Valve body 1 inner chamber arranges caging bolt 11, the Lift of restriction flap 3.
The sealing surface that strengthens polytetrafluoroethylene soft seal circle 16 is higher than the sealing surface 0.5-1 millimeter of metal o-ring 15, enhancing polytetrafluoroethylene soft seal circle 16 compressed 0.5-1 millimeters during high pressure on the flap 3, make the metal o-ring 15 and valve seat 2 fitted seal of flap 3, as shown in Figure 2.
Claims (3)
1. high pressure dual-seal safety check, comprise valve body (1), valve seat (2), valve gap (13), flap (3), flap (3) is by rocking bar (4), connecting rod (8) and bearing pin (7) are installed on the valve body (1), flap (3) adopts plane sealing with valve seat (2), it is characterized in that flap (3) adopts dual composite seal structure, described dual composite seal structure forms by strengthening polytetrafluoroethylene soft seal circle (16) and metal o-ring (15), strengthens polytetrafluoroethylene soft seal circle (16) and adopts in the force fit metal o-ring (15).
2. high pressure dual-seal safety check according to claim 1, the sealing surface that it is characterized in that strengthening polytetrafluoroethylene soft seal circle (16) is higher than the sealing surface 0.5-1 millimeter of metal o-ring (15)
3. high pressure dual-seal safety check according to claim 1 and 2 is characterized in that valve seat (2) sealing surface adopts at the upper built-up welding Si Taili material composition of valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286932 CN203240024U (en) | 2013-05-09 | 2013-05-09 | High-pressure dual-seal check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286932 CN203240024U (en) | 2013-05-09 | 2013-05-09 | High-pressure dual-seal check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203240024U true CN203240024U (en) | 2013-10-16 |
Family
ID=49317322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320286932 Expired - Fee Related CN203240024U (en) | 2013-05-09 | 2013-05-09 | High-pressure dual-seal check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203240024U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042123A (en) * | 2015-07-03 | 2015-11-11 | 南通国电电站阀门有限公司 | Supercritical Y-shaped internally-hung hard self-sealing flap-turning check valve |
| CN106523745A (en) * | 2016-12-30 | 2017-03-22 | 广东申菱环境系统股份有限公司 | Low-leakage high-pressure check valve |
| CN107975623A (en) * | 2016-10-24 | 2018-05-01 | 芙罗服务管理公司 | Valve assembly and method of providing a seal in a valve |
| CN110546372A (en) * | 2017-04-27 | 2019-12-06 | 皮尔伯格有限责任公司 | Control device for an internal combustion engine |
| CN110847856A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | Flap valve structure of pressure maintaining coring device |
| CN111766108A (en) * | 2020-07-02 | 2020-10-13 | 国家电网有限公司 | A safe and efficient oil sample collection device |
-
2013
- 2013-05-09 CN CN 201320286932 patent/CN203240024U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042123A (en) * | 2015-07-03 | 2015-11-11 | 南通国电电站阀门有限公司 | Supercritical Y-shaped internally-hung hard self-sealing flap-turning check valve |
| CN107975623A (en) * | 2016-10-24 | 2018-05-01 | 芙罗服务管理公司 | Valve assembly and method of providing a seal in a valve |
| US10753480B2 (en) | 2016-10-24 | 2020-08-25 | Flowserve Management Company | Valves including multiple seats and related assemblies and methods |
| CN113028105A (en) * | 2016-10-24 | 2021-06-25 | 芙罗服务管理公司 | Valve assembly and method of providing a seal in a valve |
| CN106523745A (en) * | 2016-12-30 | 2017-03-22 | 广东申菱环境系统股份有限公司 | Low-leakage high-pressure check valve |
| CN110546372A (en) * | 2017-04-27 | 2019-12-06 | 皮尔伯格有限责任公司 | Control device for an internal combustion engine |
| CN110546372B (en) * | 2017-04-27 | 2022-11-01 | 皮尔伯格有限责任公司 | Control device for an internal combustion engine |
| CN110847856A (en) * | 2019-11-26 | 2020-02-28 | 四川大学 | Flap valve structure of pressure maintaining coring device |
| CN110847856B (en) * | 2019-11-26 | 2024-04-12 | 四川大学 | Flap valve structure of pressure maintaining corer |
| CN111766108A (en) * | 2020-07-02 | 2020-10-13 | 国家电网有限公司 | A safe and efficient oil sample collection device |
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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 |
Granted publication date: 20131016 Termination date: 20210509 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |