CN202646799U - Ultra-low voltage differential check valve - Google Patents
Ultra-low voltage differential check valve Download PDFInfo
- Publication number
- CN202646799U CN202646799U CN 201220287217 CN201220287217U CN202646799U CN 202646799 U CN202646799 U CN 202646799U CN 201220287217 CN201220287217 CN 201220287217 CN 201220287217 U CN201220287217 U CN 201220287217U CN 202646799 U CN202646799 U CN 202646799U
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- CN
- China
- Prior art keywords
- valve
- valve body
- spring
- valve seat
- seat
- 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 - Lifetime
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Abstract
The utility model belongs to the field of valves and discloses an ultra-low voltage differential check valve which comprises a valve body, a valve clack, a valve seat, a valve rod and a spring. The ultra-low voltage differential check valve is characterized in that the valve body can be divided into an upper valve body and a lower valve body, wherein the valve seat is fixed between the upper valve body and the lower valve body, the valve seat which is fixed between the upper valve body and the lower valve body and provided with a center hole and a through hole which is arranged in ring-shaped mode is a tray-shaped body, one end of the valve rod, inside a valve cavity, is fixed with the valve clack, the spring is sleeved on the other end of the valve rod which penetrates through the center hole on the valve seat, and two ends of the spring are respectively abutted against the valve seat and a slotting nut which is arranged on the end portion of the other end of the valve rod.
Description
Technical field:
The invention belongs to valve field, especially about ultra low-pressure check valve.
Background technique:
General safety check, the gravity of flap is consistent with the spring force direction, all is to try hard to push flap to valve seat with throttle down, with the medium reverse back that prevents from carrying.So the unlatching pressure of safety check and the pressure reduction of occlusion pressure are large, not only cause the poor sensitivity of valve, and can cause that system's (container) meeting damage or damage because pressure reduction is excessive.
Summary of the invention:
The object of the invention is to carry altogether a kind of ultra low differential pressure safety check, the unlatching pressure that solves safety check and the technical problem of damage or damage excessive with the pressure reduction of occlusion pressure.
The technological scheme that the present invention solves the problems of the technologies described above employing is:
A kind of ultra low differential pressure safety check comprises valve body, flap, valve seat, valve rod and spring, it is characterized in that: this valve body divides upper valve body and lower valve body two-part; This valve seat is the disking body that is fixed on the through hole with center hole and annular configuration between upper valve body and the lower valve body; Flap is fixed on the end that valve rod is arranged in lower valve chamber, and spring housing is located on the other end shaft that valve rod passes center hole on the valve seat, both ends of the spring respectively with valve seat and the slotted nut that is arranged on valve rod the other end end against.
The present invention makes the active force of fed sheet of a media consistent with the gravitational direction of flap assembly; the elastic force of spring is then opposite; so the Blowdown of a safety valve of valve is very low; not only improved the sensitivity of valve opening and closing; and can be used as the safety component of protective system (container); play damage or damage that protective system (container) causes because pressure reduction is excessive, enlarged using scope.
Description of drawings:
Fig. 1 is structure sectional view of the present invention.
Embodiment:
See also Fig. 1, the present invention is the same with general safety check, and it comprises valve body, flap 1, valve seat 3, valve rod 5, spring 4.This valve body is by upper valve body 6 and lower valve body 9 two-part, and with the continuous one that forms of screw thread, the flange plate on mat upper valve body 6 and the lower valve body is vertically connected in system's (container).This valve seat 3 is fixed on disking body between upper valve body 6 and the lower valve body 9 for the through hole 31 with center hole and annular configuration, and it is divided into uuper valve chamber and lower valve chamber with the valve inner space.Lip end-face seal ring 2 usefulness pressure rings 10 are fixed on valve seat 3 and are positioned on the lower valve chamber end face partly.Valve rod 5 is bearing in the center hole of valve seat 3, and its end that stretches out in lower valve chamber is fixed wtih flap 1, and its screw thread that stretches out in the other end in the uuper valve chamber is provided with the slotted nut 8 with cotter pin 7 location.Spring 4 is enclosed within on the shaft that valve rod 5 is arranged in uuper valve chamber, and spring 4 two ends are bearing in respectively on slotted nut 8 and the valve seat 3.
The structure that mat is above-mentioned, the elastic force of spring 4 action direction that makes progress is by chance opposite with flap assembly gravitational directions such as the active force of fed sheet of a media and flap 1, valve rod 2, slotted nuts 8, therefore need only elastic force less than flap assembly gravity and medium active force sum, valve is just opened; Otherwise valve is just closed since this to close the pressure reduction that opens very low, so valve sensitivity greatly improves.And when system's service condition has change, can come by slotted nut 8 the strength size of Regulation spring 4, make valve again reach usage requirement.
Claims (1)
1. a ultra low differential pressure safety check comprises valve body, flap, valve seat, valve rod and spring, it is characterized in that: this valve body divides upper valve body and lower valve body two-part; This valve seat is the disking body that is fixed on the through hole with center hole and annular configuration between upper valve body and the lower valve body; Flap is fixed on the end that valve rod is arranged in lower valve chamber; Spring housing is located on the other end shaft that valve rod passes center hole on the valve seat, both ends of the spring respectively with valve seat and the slotted nut that is arranged on valve rod the other end end against.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287217 CN202646799U (en) | 2012-06-18 | 2012-06-18 | Ultra-low voltage differential check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287217 CN202646799U (en) | 2012-06-18 | 2012-06-18 | Ultra-low voltage differential check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646799U true CN202646799U (en) | 2013-01-02 |
Family
ID=47415908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220287217 Expired - Lifetime CN202646799U (en) | 2012-06-18 | 2012-06-18 | Ultra-low voltage differential check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646799U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626453A (en) * | 2017-03-17 | 2018-10-09 | 双恒阀门集团有限公司 | A kind of self-operated type emergency isolation valve |
-
2012
- 2012-06-18 CN CN 201220287217 patent/CN202646799U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626453A (en) * | 2017-03-17 | 2018-10-09 | 双恒阀门集团有限公司 | A kind of self-operated type emergency isolation valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201814 Shanghai public road, Jiading District, No. 111 Patentee after: Shanghai valve factory Limited by Share Ltd Address before: 201814 Shanghai public road, Jiading District, No. 111 Patentee before: Shanghai Valve Factory Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |