CN2553214Y - Safety valve with good centring property - Google Patents
Safety valve with good centring property Download PDFInfo
- Publication number
- CN2553214Y CN2553214Y CN 02239805 CN02239805U CN2553214Y CN 2553214 Y CN2553214 Y CN 2553214Y CN 02239805 CN02239805 CN 02239805 CN 02239805 U CN02239805 U CN 02239805U CN 2553214 Y CN2553214 Y CN 2553214Y
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- CN
- China
- Prior art keywords
- valve
- valve body
- flap
- clack
- utility
- 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 relates to a safety valve, in particular to a bleeding valve which is used in gas transportation and distribution pipeline with centering performance, comprising a valve body, a valve stem, and a valve clack; wherein, the valve body comprises an upper valve body and a lower valve body; one end of the valve stem is extended out of the upper valve body, while the other end is fixedly connected with the valve clack; a valve sleeve integrated with the upper valve body is arranged in the upper valve body; the part of the valve clack connected with the valve stem is the guide sleeve matched with the valve sleeve. The utility model is characterized in that a valve sleeve is arranged on the valve body, and a guide sleeve matched with the valve sleeve is arranged on the valve clack. The utility model has the advantages of improving the centering performance of the valve clack in returning, guaranteeing tight match of the valve clack and the valve port without leakage, eliminating hidden safety dangers, and obtaining safe and reliable operation.
Description
Technical field
The utility model relates to a kind of safety valve, and especially a kind of centering performance that is used for the gas transmission and distribution pipeline is good diffuses valve.
Technical background
The middle and high pressure gas transmission mode of many employings becomes low-pressure fuel gas to deliver to the user middle and high compression ignite controlled atmosphere by pressure regulator valve again in gas transmission and distribution system.In order to guarantee that the user uses gas safety, install in need be in gas transmission and distribution system, on the low pressure line and diffuse valve, so that in, the pressure release when gaseous-pressure of low pressure line surpasses setting value, thereby what guarantee user's use is the following safe low-pressure fuel gas of setting value, cut-off valve also is installed in addition, so that can cut off fuel gas pipeline when needed in gas transmission and distribution system.Wherein diffuse valve arrangement and comprise valve body, valve port, flap, diaphragm and valve rod etc., wherein valve rod one end stretches out valve body, the fixedly connected flap of the other end, also be set with spring on it, when cavity pressure under the diaphragm during greater than setup pressure value, move on the flap, valve port is opened, and diffuses pressure, afterwards return under spring action, owing to there is not guiding device, the centering poor performance of flap when return usually is offset the center position of valve port, causes and diffuses that valve is not closed completely or mismate and leaking gas, had the family to bring potential safety hazard, it is unreliable to work.
The model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of working stability, centering performance good diffuse valve.
The utility model centering performance is good diffuses valve, comprises valve body, valve rod and the flap be made up of upper valve body and following valve body.Wherein valve rod one end stretches out upper valve body, and the other end is fixedlyed connected with described flap.Be provided with valve pocket in the wherein said upper valve body with its one.The pilot sleeve of the part that is connected with valve rod of described flap for matching with described valve pocket.
The utility model centering performance is good diffuses valve, and the external wall of upper portion of wherein said pilot sleeve is provided with at least two rigid seal circles.
Advantage of diffusing valve and good effect that the utility model centering performance is good are: because valve body is provided with valve pocket, flap is provided with the pilot sleeve that matches with valve pocket, so can improve flap when return to neutrality, guarantee that flap cooperates with valve port tightly, air tight, eliminate safe hidden trouble, thus the utility model centering performance good to diffuse valve safe and reliable.
Other details of diffusing valve that the utility model centering performance is good and characteristics can be read the embodiment who hereinafter encyclopaedizes in conjunction with the accompanying drawings just can be cheer and bright.
Description of drawings
Fig. 1 is the good sectional structure schematic representation that diffuses valve of centering performance described in the utility model.
Embodiment
The valve that diffuses that the utility model centering performance as shown in Figure 1 is good comprises valve body, flap 15 and the valve rod of being made up of upper valve body 6 and following valve body 10 2.Wherein have pressure relief opening 11 on the upper valve body 6, have the gas port 12 that communicates with fuel gas pipeline on the following valve body 10.Middle positions are fixed with valve seat 14 with this time valve body 10 one by gusset 13 in the following valve body 10, and the groove internal fixation on valve seat 14 has rubber-like sealing gasket 9.Be provided with valve pocket 16 in the upper valve body 6 with its one.Valve pocket 16 tops are fixed with swivel nut 3 by screw thread.Flap 15 is made up of upper, middle, and lower part, and its lower middle portion is the annulus with internal thread, and this annulus is by the valve port 8 that has been threaded.The longitudinal section that valve port 8 is provided with its one is leg-of-mutton ring packing edge 5, the work that matches with sealing gasket 9 of this ring packing edge 5, the longitudinal section of ring packing edge 5 also can be other shapes such as square or rectangular, can guarantee moment like this in valve port 8 unlatchings, the useful area of gaseous-pressure effect changes little, makes that to diffuse valve work relatively stable; The middle part of flap 15 is divided into cylinder, has some through holes on the barrel; The top of flap 15 is divided into the pilot sleeve 17 that matches with valve pocket 16, this pilot sleeve 17 can be along wall slip in the valve pocket 16, its role is to guarantee valve port 8 and sealing gasket 9 to neutrality, preventing that valve port 8 from diffusing at pressure skew takes place in the return process that finishes and causes poorly sealed.Processing for convenience is provided with two rigid seal circles 18 in the external wall of upper portion of pilot sleeve 17, so both can improve the leading role of pilot sleeve 17, can reduce manufacture cost again.One end of valve rod 2 passes swivel nut 3, and the other end is fixedlyed connected with pilot sleeve 17, and coaxial package has pressure spring 4 on the valve rod 2.Clamping between upper valve body 6 and following valve body 10 has diaphragm 7, the other end of diaphragm 7 to be clamped between flap 15 and the valve port 8.The cavity of resorption of diaphragm 7 communicates with fuel gas pipeline.
During use,, the gas port 12 of diffusing valve is communicated with fuel gas pipeline with good the diffusing on the pipeline that valve is installed to gas transmission and distribution system of the utility model centering performance.Under the normal state, the pressure of the cavity of resorption of diaphragm 7 (being the chamber that with fuel gas pipeline communicate of diaphragm below 7) equates with the pressure in the fuel gas pipeline, when the pressure in the fuel gas pipeline is increased to the force value that surpasses setting, valve port 8 moves up, and produce the space between the sealing gasket 9, this moment, fuel gas pipeline was communicated with atmosphere, combustion gas just enters in the flap 15 by the space between valve port 8 and the sealing gasket 9, emit by through hole and pressure relief opening 11 on the middle part cylindrical wall of flap 15 again, reach the pressure release purpose; When the pressure in diaphragm 7 cavity of resorptions during less than the force value set, the coexist effect of spring 4 of valve port 8 and flap 15 1 falls after rise down, and valve port 8 contacts and seals with sealing gasket 9, and upper and lower two chambers of diaphragm 7 are completely cut off.
Claims (2)
1. the centering performance is good diffuses valve, comprise valve body, valve rod (2) and the flap (15) formed by upper valve body (6) and following valve body (10), wherein valve rod (2) one ends stretch out upper valve body (6), the other end is fixedlyed connected with described flap (15), it is characterized in that being provided with in the described upper valve body (6) valve pocket (16) with its one, the pilot sleeve (17) of the part that is connected with valve rod (2) of described flap (15) for matching with described valve pocket (16).
2. centering performance according to claim 1 is good diffuses valve, it is characterized in that the external wall of upper portion of described pilot sleeve (17) is provided with at least two rigid seal circles (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02239805 CN2553214Y (en) | 2002-07-11 | 2002-07-11 | Safety valve with good centring property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02239805 CN2553214Y (en) | 2002-07-11 | 2002-07-11 | Safety valve with good centring property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2553214Y true CN2553214Y (en) | 2003-05-28 |
Family
ID=33713078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02239805 Expired - Fee Related CN2553214Y (en) | 2002-07-11 | 2002-07-11 | Safety valve with good centring property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2553214Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
-
2002
- 2002-07-11 CN CN 02239805 patent/CN2553214Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
| CN105352711B (en) * | 2015-11-02 | 2018-03-02 | 浙江利永达制冷机械有限公司 | A kind of constant pressure valve and its detection means and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |