CN2426051Y - Piston type pressure-releasing and pressure-keeping valve - Google Patents
Piston type pressure-releasing and pressure-keeping valve Download PDFInfo
- Publication number
- CN2426051Y CN2426051Y CN 00217624 CN00217624U CN2426051Y CN 2426051 Y CN2426051 Y CN 2426051Y CN 00217624 CN00217624 CN 00217624 CN 00217624 U CN00217624 U CN 00217624U CN 2426051 Y CN2426051 Y CN 2426051Y
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- China
- Prior art keywords
- valve
- pressure
- utility
- piston
- model
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- 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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- Details Of Valves (AREA)
- Control Of Fluid Pressure (AREA)
- Safety Valves (AREA)
Abstract
The utility model discloses a piston type pressure-releasing and pressure-keeping valve, which is composed of a main valve, a constant pressure guide valve and a connecting pipe, wherein, a valve clack of the main valve is positioned on an outlet of a valve seat and is interlocked with a control mechanism through a valve rod. The utility model is characterized in that the control mechanism is composed of a piston cylinder and a piston, causing that the utility model can quickly eliminate abnormal pressure and can have the advantage of long service life. A filter screen is arranged in a valve body on the inlet side of the valve seat of the main valve without needing an outer filter; the utility model is especially suitable for protect systems and devices safety on a liquid transmission pipeline.
Description
The utility model relates to a kind of valve, specifically about a kind of pressure release holding valve that keeps system pressure safety.
In water supply or other liquid-supplying system; it all is that import and export with the pressure release holding valve are directly installed in the by-pass line of system that pressure device is held in traditional pressure release; the keying of pressure release holding valve is by the pressure control of the logical medium of pipe; pressure release flow when its major defect is the unlatching of pressure release holding valve is little; can not eliminate abnormal pressure rapidly, to the protection weak effect of system equipment.
China's utility model patent, notification number is the Decompression valves of CN2347006Y, pressure release pilot valve by a main valve and the keying of a control main valve constitutes, adopt the pressure in the small-bore pressure release pilot valve control main valve diaphragm chamber, realize the keying of main valve, its pressure release flow is big, rapidly the bypass abnormal pressure.But its deficiency is the diaphragm cracky in use of main valve, thereby makes valve function out of hand, and life of product is short.In addition, for preventing the service behaviour of medium impurity effect pressure release holding valve, fixed filter outside general suction side at main valve needs.
One of the purpose of this utility model is at the deficiencies in the prior art, provides a kind of and can eliminate abnormal pressure rapidly, has the piston type pressure release holding valve of long service life again.
Two of the purpose of this utility model is the deficiencies that exist at prior art, and a kind of piston type pressure release holding valve with filter medium impurity function is provided.
The technological scheme that realizes the utility model purpose mainly comprises main valve, level pressure pilot valve and connecting tube, and the flap of main valve is positioned at the outlet side of its valve seat, and by valve rod and control mechanism interlock.Control mechanism is made of piston cylinder and piston, in the valve body of main valve valve seat suction side filter screen is housed.
The utility model beneficial effect compared with prior art is that the control mechanism of main valve is made of piston and piston cylinder, solved prior art makes valve function out of hand because of diaphragm breakage defective, long product lifecycle, and the impurity in the filter screen that is provided with in the valve body energy filter medium is to the influence of valve performance, do not need other fixed filter before valve, simplify the erection unit of pipe-line system, reduce system's installation cost.
Fig. 1 is the structural representation of the utility model piston type pressure release holding valve.
The technical solution of the utility model now is described in further detail in conjunction with the accompanying drawings and embodiments.Pressure release holding valve as shown in Figure 1 mainly comprises main valve, level pressure pilot valve 11 and connecting tube, and main valve comprises valve body 1, valve seat 3, flap 4, valve rod 5, valve gap 10, spring 6, control mechanism and assembling set and Sealing.Control mechanism constitutes by being contained in the piston cylinder 9 between valve gap 10 and the valve body 1 and being positioned at the piston 8 of piston cylinder 9 internal fixation in valve rod 5 upper ends.Flap 4 is positioned at the outlet side of valve seat 3, constitutes linking mechanisms with valve rod 5, piston 8, in valve rod 5 peripheries of flap 4 upsides and piston cylinder 9 downsides spring 6 is housed.The suction side passage of valve body 1 and outlet side passage are communicated with by the inner chamber of connecting tube with piston cylinder 9 respectively.
On the connecting tube between valve body 1 suction side passage and the piston cylinder 9 level pressure pilot valve 11, needle value 12, ball valve 13 and filter 14 are housed, its middle filtrator 14 is installed near valve body 1 side.
Valve body 1 outlet side passage is communicated with piston cylinder 9 inner chambers by the control mouth of connecting tube by ball valve 7 and level pressure pilot valve 11.
Be provided with filter screen 2 in the valve body 1 of the suction side of main valve valve seat 3.
Control principle of the present utility model is: when the system pressure of main valve suction side is lower than the safety pressure of setting, level pressure pilot valve 11 is communicated with main valve suction side pressure by needle value 12, ball valve 13, filter 14 with piston cylinder 9 inner chambers, and the passage between shutoff piston cylinder 9 inner chambers and the main valve outlet side, make the pressurization of piston cylinder 9 inner chambers, main valve is closed; When the system pressure of main valve suction side is higher than the safety pressure of setting, level pressure pilot valve 11 will be communicated with the passage of piston cylinder 9 inner chambers and main valve outlet side, bleed off the pressure of piston cylinder 9 inner chambers, make main valve open, release system high pressure.
Claims (2)
1, a kind of piston type pressure release holding valve, comprise main valve, level pressure pilot valve and connecting tube, the flap of main valve (4) is positioned at valve seat (3) outlet side, and by valve rod (5) and control mechanism interlock, it is characterized in that: described control mechanism is made of piston cylinder (9) and piston (8); Be provided with filter screen (2) in the valve body (1) of valve seat (3) suction side.
2, piston type pressure release holding valve according to claim 1 is characterized in that on the connecting tube between valve body (1) suction side passage and the piston cylinder (9) filter (14) being housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217624 CN2426051Y (en) | 2000-05-17 | 2000-05-17 | Piston type pressure-releasing and pressure-keeping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217624 CN2426051Y (en) | 2000-05-17 | 2000-05-17 | Piston type pressure-releasing and pressure-keeping valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2426051Y true CN2426051Y (en) | 2001-04-04 |
Family
ID=33583152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00217624 Expired - Fee Related CN2426051Y (en) | 2000-05-17 | 2000-05-17 | Piston type pressure-releasing and pressure-keeping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2426051Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836240A (en) * | 2014-02-26 | 2014-06-04 | 武汉第二船舶设计研究所 | Valve with unloading device |
-
2000
- 2000-05-17 CN CN 00217624 patent/CN2426051Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836240A (en) * | 2014-02-26 | 2014-06-04 | 武汉第二船舶设计研究所 | Valve with unloading device |
| CN103836240B (en) * | 2014-02-26 | 2016-05-04 | 武汉第二船舶设计研究所 | A kind of valve with discharge mechanism |
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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 |