CN202252153U - Micro resistance check valve - Google Patents
Micro resistance check valve Download PDFInfo
- Publication number
- CN202252153U CN202252153U CN2011203514278U CN201120351427U CN202252153U CN 202252153 U CN202252153 U CN 202252153U CN 2011203514278 U CN2011203514278 U CN 2011203514278U CN 201120351427 U CN201120351427 U CN 201120351427U CN 202252153 U CN202252153 U CN 202252153U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve core
- spool
- poppet shaft
- plug screw
- 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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Abstract
The utility model provides a micro resistance check valve, which comprises a valve body, a valve seat, a valve core shaft, a spring, a valve core and a spiral plug, wherein the valve seat is arranged in the valve body, the valve core shaft is arranged in the valve seat in a penetrating way, the valve core is fixedly arranged on the valve core shaft, the spring is arranged between the valve core and the valve core shaft, a sealing device is arranged between the valve core and the valve body, the spiral plug is fixed with the valve body, and the valve seat, the valve core shaft, the valve core and the spiral plug are all coaxial. The micro resistance check valve is characterized in that a guide device is arranged on the spiral plug, and the valve core shaft passes through the guide device to be sealed and matched with the spiral plug. The guide device for the valve core shaft to pass is additionally arranged on the spiral plug, so the concentricity of the spiral plug, the valve core shaft, the valve core and the valve seat is ensured, and a sealing pair can reach the reliable sealing effect regardless of whether the micro resistance check valve adopts the vertical installation mode or a transverse installation mode.
Description
Technical field
The utility model relates to a kind of valve, particularly a kind of little resistance safety check.
Background technique
Little resistance safety check is claimed check valve again, and its effect is to prevent that the medium in the pipeline from flowing backwards.Existing little resistance safety check generally comprises valve body, valve seat, poppet shaft, spring, spool, seal ring and plug screw; Valve seat is contained in the valve body, and poppet shaft is located in the valve seat, and spool is fixed on the poppet shaft; Be provided with spring between spool and the valve seat; Plug screw and valve body are fixed, and are provided with seal arrangement between spool and the plug screw, and the equal in the vertical direction of valve seat, poppet shaft, spool and plug screw is coaxial.This little resistance safety check is after medium gets into valve body, and the pressure through medium makes spool move the unlatching that realizes valve, when closing, is realized jointly by the reposition force of spring and the deadweight of medium back flow pressure and spool.In this structure; Little resistance safety check can only vertically be installed, if operating mode is horizontal, little resistance safety check then can not play seal action; Simultaneously because of the deadweight of spool and the matching gap of poppet shaft and valve seat orifice; Can cause the off-centre of spool, cause sealing pair normally not play seal action, influence the use of valve.
Summary of the invention
In order to overcome above-mentioned the problems of the prior art, the utility model provides a kind of little resistance safety check of supporting laterally installation and good airproof performance.
The utility model is realized through following technological scheme:
A kind of little resistance safety check comprises valve body, valve seat, poppet shaft, spring, spool and plug screw, and valve seat is contained in the valve body; Poppet shaft is located in the valve seat, and spool is fixed on the poppet shaft, is provided with spring between spool and the poppet shaft; Be provided with seal arrangement between spool and the valve body, plug screw and valve body are fixed, and valve seat, poppet shaft, spool and plug screw are all coaxial; It is characterized in that a guiding device is arranged on the said plug screw, poppet shaft is passed said guiding device and plug screw is sealed and matched.
Further, described guiding device is the axial hole on the plug screw.
Further, spool is fixed on the poppet shaft through being threaded, and realizes being tightly connected of spool and poppet shaft through first seal ring.
Further, be sealed and matched through the O RunddichtringO between poppet shaft and the plug screw.
The utility model is used for the guiding device that poppet shaft is passed through through on plug screw, setting up; Thereby guaranteed the concentricity of plug screw, poppet shaft, spool and valve seat; Make no matter little resistance safety check is to adopt vertical mounting type; Still adopt the horizontal type mounting type, sealing pair can both reach reliable sealing effect.
Description of drawings
Fig. 1 is the sectional drawing of the described little resistance safety check of the utility model;
Fig. 2 is the plan view of the described plug screw of the utility model;
Fig. 3 is the plan view of the described plug screw of the utility model;
The implication of each label is following among the figure:
The 1-valve body, 2-valve seat, 3-poppet shaft, 4-spring, 5-first seal ring, 6-spool, 7-second seal ring, 8-plug screw.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
As shown in Figure 1, the described little resistance safety check of the utility model comprises valve body 1, valve seat 2, poppet shaft 3, spring 4, spool 6 and plug screw 8.Valve seat 2 is contained in the valve body 1, and poppet shaft 3 is located in the valve seat 2.Spool 6 is fixed on the poppet shaft 3 through being threaded, and realizes being tightly connected of spool 6 and poppet shaft 3 through first seal ring 5, and said first seal ring 5 can be the O RunddichtringO.Be provided with spring 4 between spool 6 and the valve seat 2.Be provided with second seal ring 7 between spool 6 and the valve body 1, plug screw 8 is used for fixing second seal ring 7, passes through the screw thread secure fit between said plug screw 8 and the valve body 1.Valve seat 2, poppet shaft 3, spool 6 and plug screw 8 are all coaxial.
Like Fig. 2, shown in 3, in order to guarantee the concentricity of plug screw 8, poppet shaft 3, spool 6 and valve seat 2, plug screw 8 is provided with a guiding device; Said guiding device can be the axial hole on the plug screw 8; Poppet shaft 3 is passed said axial hole, and poppet shaft 3 one ends are by valve seat 2 guiding, and an end is by plug screw 8 guiding; So no matter to be to adopt vertical mounting type; Still adopt the horizontal type mounting type, all can keep concentricity preferably, make win seal ring 5 and second seal ring 7 play normal sealing effect.Said guiding device can also adopt other modes to realize, is not limited to the axial hole of mentioning in the present embodiment.
Preferably, in order to prevent the clearance leakage of medium, pass a section of plug screw 8 in poppet shaft 3 and set up O-ring seals one from poppet shaft 3, be used for and plug screw 8 between sealing.
Seal ring described in the utility model etc. all can adopt other seal arrangement replacements, is not limited to the O-ring seals shown in the present embodiment.
The utility model not only is confined to above-mentioned embodiment; Persons skilled in the art are according to the disclosed content of the utility model; Can adopt other multiple embodiment embodiment of the present invention, therefore, project organization of every employing the utility model and thinking; Do some simple designs that change or change, all fall into the scope of the utility model protection.
Claims (4)
1. little resistance safety check; Comprise valve body (1), valve seat (2), poppet shaft (3), spring (4), spool (6) and plug screw (8); Valve seat (2) is contained in the valve body (1), and poppet shaft (3) is located in the valve seat (2), and spool (6) is fixed on the poppet shaft (3); Be provided with spring (4) between spool (6) and the poppet shaft (3); Be provided with seal arrangement between spool (6) and the valve body (1), plug screw (8) is fixing with valve body (1), and valve seat (2), poppet shaft (3), spool (6) and plug screw (8) are all coaxial;
It is characterized in that said plug screw has a guiding device on (8), poppet shaft (3) passes said guiding device and plug screw (8) is sealed and matched.
2. little resistance safety check according to claim 1 is characterized in that, described guiding device is the axial hole on the plug screw (8).
3. little resistance safety check according to claim 1 is characterized in that spool (6) is fixed on through being threaded on the poppet shaft (3), and realizes being tightly connected of spool (6) and poppet shaft (3) through first seal ring (5).
4. little resistance safety check according to claim 1 is characterized in that, is sealed and matched through O-ring seals between poppet shaft (3) and the plug screw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514278U CN202252153U (en) | 2011-09-19 | 2011-09-19 | Micro resistance check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514278U CN202252153U (en) | 2011-09-19 | 2011-09-19 | Micro resistance check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202252153U true CN202252153U (en) | 2012-05-30 |
Family
ID=46113396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203514278U Expired - Fee Related CN202252153U (en) | 2011-09-19 | 2011-09-19 | Micro resistance check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202252153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027328A (en) * | 2018-08-25 | 2018-12-18 | 宿州中矿三杰科技有限公司 | A kind of vertical non-return valve |
-
2011
- 2011-09-19 CN CN2011203514278U patent/CN202252153U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027328A (en) * | 2018-08-25 | 2018-12-18 | 宿州中矿三杰科技有限公司 | A kind of vertical non-return valve |
| CN109027328B (en) * | 2018-08-25 | 2020-05-01 | 宿州中矿三杰科技有限公司 | Vertical check valve |
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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: 20120530 Termination date: 20140919 |
|
| EXPY | Termination of patent right or utility model |