CN205047907U - Reverse low leak rate check valve - Google Patents
Reverse low leak rate check valve Download PDFInfo
- Publication number
- CN205047907U CN205047907U CN201420774295.3U CN201420774295U CN205047907U CN 205047907 U CN205047907 U CN 205047907U CN 201420774295 U CN201420774295 U CN 201420774295U CN 205047907 U CN205047907 U CN 205047907U
- Authority
- CN
- China
- Prior art keywords
- valve body
- face
- valve core
- described valve
- reverse
- 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 description 24
- 238000005987 sulfurization reaction Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000001307 helium Substances 0.000 abstract description 4
- 229910052734 helium Inorganic materials 0.000 abstract description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001819 mass spectrum Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model provides a reverse low leak rate check valve, including coupling (1), spring holder (2), valve body (3), spring (4), valve core (5), vulcanize one deck 0.2mm~1mm rubber on terminal surface (501) of valve core (5). The utility model discloses the check valve adopts the leak hunting of malleation helium mass spectrum under 0.1MPa pressure differential, reverse leak rate can be less than 1.0 10 -5Pa m3s, except that the check valve that can replace traditional structure is used for general hydraulic system and pneumatic system, still can be applied to the reverse occasion that has higher leakproofness to require. And its simple structure, reliability are high, the processing cost is low, easily promote, have the value of higher use.
Description
Technical field
The utility model belongs to one-way valve field, especially relates to a kind of one-way valve of reverse less leakage rate.
Background technique
The one-way valve of extensive use in hydraulic system and pneumatic system, generally form linear sealing under spring force with the circular orifice on valve body to prevent liquid or gas reverse flow by the cone valve heart or steel ball, the circularity of this structure to the circularity of the cone valve heart or steel ball and valve body circular orifice requires higher, particularly cause processing cost high when reverse sealing requirements is higher, even if raising machining accuracy, the reverse leak rate of one-way valve of this structure is general also at 1.0 × more than 10-2Pam3/s (under 0.1MPa pressure reduction malleation helium mass spectrum leak detection), when the reverse leak rate of system to one-way valve requires lower than 1.0 × 10-2Pam3/s, as in the space station that gas resource is very valuable, require that the reverse leak rate of one-way valve is generally not more than 1.0 × 10-4Pam3/s, existing one-way valve cannot meet usage requirement.
Model utility content
The purpose of this utility model is: for overcoming the problem that prior art one-way valve difficulty of processing is large, cost is high, reverse sealing is low, the utility model uses face sealing instead, sulfuration one deck rubber on the sealing surface of valve core or valve body, processing technology is simple, cost is low, reverse high leak tightness is good, leak rate is low, and reliability is high.
The utility model provides a kind of oppositely less leakage rate one-way valve, comprise pipe joint 1, spring seat 2, valve body 3, spring 4, valve core 5, described valve body 3 import internal diameter is less than exit inside diameter, inside is step surface structure, described step surface is sealing surface 301, described valve core 5 loads in the center hole of described valve body 3 from the outlet end of described valve body 3, the end face 501 of described valve core 5 contacts with described sealing surface 301, sulfuration one deck 0.2mm ~ 1mm rubber on the end face 501 of described valve core 5, spring 4 one end is connected the other end with described valve core 5 and is connected with spring seat 2, described spring seat 2 is positioned at inside the outlet of described valve body 3, the outlet of described valve body 3 is done shell nosing treatment and is prevented described spring seat 2 from ejecting, described valve body 3 is with outside thread, described pipe joint 1 is with internal thread, described valve body 3 is arranged in the inner chamber of described pipe joint 1 by screw-thread fit.
Preferably, the end face 501 of described valve core 5 is plane, and described sealing surface 301 is the planar annular corresponding with described end face 501.
Preferably, the end face 501 of described valve core 5 is conical surface, and described sealing surface 301 is the conical surface corresponding with described end face 501.
Preferably, the end face 501 of described valve core 5 is spherical, and described sealing surface 301 is the sphere corresponding with described end face 501.
The utility model has the advantages that: the utility model one-way valve adopts malleation helium mass spectrum leak detection under 0.1MPa pressure reduction, reverse leak rate can lower than 1.0 × 10-5Pam3/s, except the one-way valve of conventional construction can be replaced for except general hydraulic system and pneumatic system, also can be applicable to the occasion oppositely having higher sealing requirements.And its structure is simple, reliability is high, processing cost is low, is easy to promote, has the value of higher use.
Accompanying drawing explanation
Below the utility model accompanying drawing is described:
Fig. 1: the reverse less leakage rate one-way valve structures schematic diagram that the utility model proposes;
Fig. 2: pipe joint 1 plan view;
The left view of Fig. 3: Fig. 2;
Fig. 4; The plan view of spring seat 2;
Fig. 5: the plan view of valve body 3;
Fig. 6: the plan view of valve core 5.
Embodiment
The reverse less leakage rate one-way valve of one in the present embodiment, comprise pipe joint 1, spring seat 2, valve body 3, spring 4, valve core 5, described valve body 3 import internal diameter is less than exit inside diameter, inside is step surface structure, described step surface is sealing surface 301, described valve core 5 loads in the center hole of described valve body 3 from the outlet end of described valve body 3, the end face 501 of described valve core 5 contacts with described sealing surface 301, sulfuration one deck 0.2mm ~ 1mm rubber on the end face 501 of described valve core 5, spring 4 one end is connected with described valve core 5, the other end is connected with spring seat 2, the outlet that described spring seat 2 is positioned at described valve body 3 is surveyed, the outlet of described valve body 3 is done shell nosing treatment and is prevented described spring seat 2 from ejecting, described valve body 3 is with outside thread, described pipe joint 1 is with internal thread, described valve body 3 is arranged in the inner chamber of described pipe joint 1 by screw-thread fit.
In application, pipe joint 1 is imported and exported and is connected with the pipeline of application system respectively, in work, when gas or liquid flow into from pipe joint entrance point, promote valve core 5 Compress Spring 4, valve core 5 moves to pipe joint 1 outlet end, and valve core 5 is opened with the sealing surface of valve body 3, gas or fluid can pass through, and flow to the outlet of pipe joint 1; When gas in pipeline or liquid are for reverse flow, valve core 5 moves to the entrance point of pipe joint 1 and only leans on the sealing surface 301 on valve body 3, close backward channel, and the rubber compressed under spring force and gas or liquid effects on valve core 5 sealing surface 501, between the sealing surface of valve core 5 and valve body 3, form good sealing strip like this, realize the reverse sealing function of one-way valve.This non-return valve operational is reliable, and reverse leak rate is low, and when adopting the test of 0.1MPa helium mass spectrum leak detection method to product, recording reverse leak rate is 3.8 × 10-6Pam3/s, well below the leak rate of existing one-way valve.
Claims (4)
1. a reverse less leakage rate one-way valve, it is characterized in that, comprise pipe joint (1), spring seat (2), valve body (3), spring (4), valve core (5), described valve body (3) import internal diameter is less than exit inside diameter, inside is step surface structure, described step surface is sealing surface (301), described valve core (5) loads in the center hole of described valve body (3) from the outlet end of described valve body (3), the end face (501) of described valve core (5) contacts with described sealing surface (301), the upper sulfuration one deck 0.2mm ~ 1mm rubber of end face (501) of described valve core (5), spring (4) one end is connected the other end with described valve core (5) and is connected with spring seat (2), described spring seat (2) is positioned at inside the outlet of described valve body (3), the outlet of described valve body (3) is done shell nosing treatment and is prevented described spring seat (2) from ejecting, described valve body (3) is with outside thread, described pipe joint (1) is with internal thread, described valve body (3) is arranged in the inner chamber of described pipe joint (1) by screw-thread fit.
2. one-way valve according to claim 1, is characterized in that, the end face (501) of described valve core (5) is plane, and described sealing surface (301) is the planar annular corresponding with described end face (501).
3. one-way valve according to claim 1, is characterized in that, the end face (501) of described valve core (5) is conical surface, and described sealing surface (301) is the conical surface corresponding with described end face (501).
4. one-way valve according to claim 1, is characterized in that, the end face (501) of described valve core (5) is spherical, and described sealing surface (301) is the sphere corresponding with described end face (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774295.3U CN205047907U (en) | 2014-12-10 | 2014-12-10 | Reverse low leak rate check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774295.3U CN205047907U (en) | 2014-12-10 | 2014-12-10 | Reverse low leak rate check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047907U true CN205047907U (en) | 2016-02-24 |
Family
ID=55341484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420774295.3U Expired - Fee Related CN205047907U (en) | 2014-12-10 | 2014-12-10 | Reverse low leak rate check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205047907U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706700A (en) * | 2020-06-30 | 2020-09-25 | 嘉善海力达工具有限公司 | Unidirectional flow control mechanism and hydraulic pump base structure |
| CN113847458A (en) * | 2021-09-15 | 2021-12-28 | 中国船舶重工集团公司第七0三研究所 | Low pressure opening check valve for bleed air circuit between combustion chamber and nozzle of gas turbine |
-
2014
- 2014-12-10 CN CN201420774295.3U patent/CN205047907U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706700A (en) * | 2020-06-30 | 2020-09-25 | 嘉善海力达工具有限公司 | Unidirectional flow control mechanism and hydraulic pump base structure |
| CN111706700B (en) * | 2020-06-30 | 2024-08-16 | 嘉善海力达工具有限公司 | Unidirectional flow control mechanism and hydraulic pump base structure |
| CN113847458A (en) * | 2021-09-15 | 2021-12-28 | 中国船舶重工集团公司第七0三研究所 | Low pressure opening check valve for bleed air circuit between combustion chamber and nozzle of gas turbine |
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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: 20160224 Termination date: 20201210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |