CN202510778U - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN202510778U CN202510778U CN2011204343252U CN201120434325U CN202510778U CN 202510778 U CN202510778 U CN 202510778U CN 2011204343252 U CN2011204343252 U CN 2011204343252U CN 201120434325 U CN201120434325 U CN 201120434325U CN 202510778 U CN202510778 U CN 202510778U
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- flap
- main
- spring
- 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
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a pilot operated safety valve, which comprises a main valve and a pilot valve, wherein the main valve comprises a valve body, a valve seat, a valve flap and a valve cover; a spring is arranged between the valve flap and the valve cover; the pilot valve is a spring type safety valve; principally, a small hole for communicating an inlet passage and a spring cavity is formed in the center of the valve flap; the pilot valve is arranged in an upper end face of the valve cover; and a through hole for communicating a pilot valve inlet with a main valve spring cavity is formed in the center of the valve cover. The pressure in the main valve spring cavity is released after the pilot valve is opened, so that the main valve enables full discharge. The pilot operated safety valve has the advantages of simple structure, low manufacturing cost, large discharge flow, high discharge speed and the like, and is suitable for an overpressure protection device on a large-aperture pipeline.
Description
Technical field
The utility model relates to valve field, specifically about a kind of safety valve.The utility model is applicable to the overpressure protector on the large diameter pipeline.
Technical background
Pilot operated safety valve is a kind of non-direct-operated relief valve; Form by main valve and pilot valve; General prominent open type or the proportion expression small flow safety valve of adopting of the pilot valve of tradition Pilot operated safety valve; Its complex structure, manufacture cost are high, emission flow is little, mass rate of emission is slow, can not be applicable to the overpressure protector on the large diameter pipeline.
Summary of the invention
The purpose of the utility model is the shortcoming that exists to existing technology, and a kind of simple in structure, low cost of manufacture, emission flow is big, mass rate of emission is fast Pilot operated safety valve are provided.
The technological scheme of the utility model comprises main valve and pilot valve; Main valve comprises valve body, valve seat, flap, valve gap; Be provided with spring between flap and the valve gap, pilot valve adopts Direct spring loaded safety valve, mainly is that the flap center is shaped on the aperture that is communicated with inlet passage and spring chamber; Pilot valve is installed in the valve gap upper-end surface, and the valve gap center is shaped on the through hole that is communicated with pilot valve import and main spool spring chamber.
In above technological scheme, between the valve seat of main valve and valve gap, be provided with guide sleeve, flap is installed in the guide sleeve.
The utility model has the advantages that the pressure in the main spool spring chamber of releasing after pilot valve is opened, main valve is discharged entirely, it is simple in structure, low cost of manufacture, emission flow is big, mass rate of emission is fast, is applicable to the overpressure protector on the above large diameter pipeline of 200mm.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Pilot operated safety valve as shown in Figure 1 comprises main valve and pilot valve 9, and main valve comprises valve body 1, valve seat 2, flap 3, valve gap 8, is provided with spring 6 between flap 3 and the valve gap 8, forms spring chamber between the two.Pilot valve 9 adopts Direct spring loaded safety valve.Said flap 3 centers are shaped on the aperture that is communicated with inlet passage and spring chamber, and pilot valve 9 is installed in valve gap 8 upper-end surfaces of main valve, are shaped on the through hole that is communicated with pilot valve 9 imports and main spool spring chamber at valve gap 8 centers.The aperture of main valve import pressure medium through flap 3 gets into spring chamber, utilize flap 3 upper-end surface external diameters greater than the pressure reduction of its sealing surface internal diameter than the elastic force that adds spring, make main valve keep sealing.When the main valve inlet pressure surpassed setting pressure, pilot valve was opened automatically, and the pressure in the main valve flap 3 upper springs chambeies of releasing is opened main valve flap 3 automatically, and the full main valve inlet pressure of releasing that discharges keeps system pressure safety.Pilot valve 9 outlets are communicated with the main valve outlet by discharge pipe 7.
Between the valve seat 2 of main valve and valve gap 8, be provided with guide sleeve 4, flap 3 is installed in the guide sleeve 4, the external cylindrical surface 5 of flap 3 and the inner cylindrical surface of guide sleeve 4 movingly, guide sleeve 4 bottoms are provided with the MEDIA FLOW port.
Claims (2)
1. Pilot operated safety valve; Comprise main valve and pilot valve (9), main valve comprises valve body (1), valve seat (2), flap (3), valve gap (8), is provided with spring (6) between flap (3) and the valve gap (8); Pilot valve (9) adopts Direct spring loaded safety valve; It is characterized in that said flap (3) center is shaped on the aperture that is communicated with inlet passage and spring chamber, pilot valve (9) is installed in valve gap (8) upper-end surface of main valve, is shaped on the through hole that is communicated with pilot valve (9) import and main spool spring chamber at valve gap (8) center.
2. Pilot operated safety valve according to claim 1 is characterized in that being provided with guide sleeve (4) between valve seat (2) and the valve gap (8) at main valve, and flap (3) is installed in the guide sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204343252U CN202510778U (en) | 2011-11-01 | 2011-11-01 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204343252U CN202510778U (en) | 2011-11-01 | 2011-11-01 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202510778U true CN202510778U (en) | 2012-10-31 |
Family
ID=47063265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204343252U Expired - Fee Related CN202510778U (en) | 2011-11-01 | 2011-11-01 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202510778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277550A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Pilot-operated type relief valve |
-
2011
- 2011-11-01 CN CN2011204343252U patent/CN202510778U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277550A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Pilot-operated type relief valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102330834B (en) | Electromagnetic valve | |
| CN204226765U (en) | A kind of spring safety valve and Anesthesia machine | |
| CN103410981B (en) | Parallel valve core type high-pressure electromagnetic valve | |
| CN203549044U (en) | Large-flow breakaway coupling | |
| CN202510778U (en) | Pilot operated safety valve | |
| CN207848551U (en) | The guide electromagnetic valve of quick response | |
| CN201792853U (en) | One-way pressure regulating valve | |
| CN107477220B (en) | Explosion-proof water-saving check valve | |
| CN203477329U (en) | High-pressure solenoid valve of parallel valve core type | |
| CN202432012U (en) | Fast and anti-interference pilot valve | |
| CN201517650U (en) | Balance pressure reducing valve | |
| CN203963048U (en) | A kind of Dual Drive Pneumatic butterfly valve | |
| CN204201210U (en) | A kind of reduction valve | |
| CN104121445B (en) | Bolt type gas pressure-reducing surge pipe | |
| CN204164448U (en) | A kind of pressurized container uses emergency seat | |
| CN202646234U (en) | Hydraulic flow limiting safety explosion-proof valve | |
| CN202767943U (en) | Screw pump oil well safe pressure relief device | |
| CN202684155U (en) | Valve body drill jig for ball check valve | |
| CN202165050U (en) | Discharge valve for hydraulic wellhead safety valve | |
| CN201588932U (en) | Sealing ring of valve | |
| CN202273927U (en) | Labor-saving hydraulic stop valve | |
| CN202545883U (en) | Three-way cone type plug-in valve | |
| CN202812336U (en) | Multifunction vehicle compressed natural gas cylinder valve | |
| CN204239845U (en) | Electromagnetic gas Emergeny Cutoff Valves | |
| CN204164454U (en) | Gas pressure-reducing surge pipe |
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: 20121031 Termination date: 20181101 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |