CN2074407U - Bi-weight defferential-pressure-type safety valve - Google Patents
Bi-weight defferential-pressure-type safety valve Download PDFInfo
- Publication number
- CN2074407U CN2074407U CN 90202383 CN90202383U CN2074407U CN 2074407 U CN2074407 U CN 2074407U CN 90202383 CN90202383 CN 90202383 CN 90202383 U CN90202383 U CN 90202383U CN 2074407 U CN2074407 U CN 2074407U
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- weight
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- seat
- safety valve
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- Safety Valves (AREA)
Abstract
The utility model relates to a safety valve of the bi-weight differential-pressure-type which is mainly used for a steam boiler. The utility model is characterized in that the sealing structure of bi-weight and dual rings is adopted. The utility model is mainly composed of a valve body, a main weight, an insulation seat, a seat for the dual rings, a valve cap, etc. The middle part of the main weight is opened with a damping small hole. The action of steam pressure of the boiler is used, and the pressure difference is formed in the inner cavity of the valve body. The opening and closing of the valve is realized by that the main weight is controlled by the sub weight. The utility model has the advantages of simple and compact structure, good manufacturability, no spring piece, no sliding sealing piece, reliable and stable performances, and long service life.
Description
The present invention relates to a kind of annex of steam boiler, specifically is exactly the safety valve that uses on the steam boiler.
At present, the Direct spring loaded safety valve that extensively adopts on the steam boiler, complex structure not only, and also also very tight to the performance requirement of spring, make difficulty.The sealing force of spring action on flap becomes greatly with the increase of Lift, hindered the smooth unlatching of flap.And spring is under the high temperature for a long time, and performance can change, and loses efficacy easily.
In addition, common deadweight safety valve, owing to only utilize the action of gravity of weight to seal, so volume is big, Heavy Weight only is applicable to the occasion of lower pressure, uses on the E level steam boiler of pressure less than 0.1MPa usually, as domestic patent 86207012.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art.Provide a kind of volume little, simple and compact for structure, easy to manufacture.Differential dual hammer safety valve stable and reliable for performance.The steam boiler that not only is fit to lower pressure uses, and also can use on the steam boiler of elevated pressures.
Below in conjunction with accompanying drawing the embodiment of nonuniqueness of the present invention is done detailed explanation.
Accompanying drawing is depicted as embodiment's sectional view.
Bi-weight defferential-pressure-type safety valve mainly is made up of valve body, main weight, secondary weight, separate seat, dicyclo seat, sealing ring, valve gap etc. The inner chamber of valve body (1) has two weights, main weight (3) and secondary weight (7). Main weight (3) is lower. Secondary weight (7) is upper, and the centre is separate seat (6), and there is a damping hole centre of main weight (3), and also there is an aperture centre of separate seat (6). The outer surface cover of main weight (3) has sealing ring (4), is furnished with dicyclo seat (2) on the valve body (1), and ring communicates with the steam inlet in it, and outer shroud communicates with steam (vapor) outlet.
Operation principle of the present invention: when the steam pressure in the steam generator system is lower than setting. Secondary weight (7) seals the aperture on the separate seat (6) under Action of Gravity Field. Pressure in control chamber this moment (5) equates that with steam generator system pressure main weight (3) is tightly lived the interior ring seal of dicyclo seat (2) under Action of Gravity Field. That is to say to seal the steam inlet that simultaneously, sealing ring (4) seals the outer ring of dicyclo seat (2), that is to say to seal steam (vapor) outlet under Action of Gravity Field. Realize thus the dicyclo synchronous sealed. At this moment, arranged at safety valve is in closed condition.
When vapor pressure in the system surpassed specified value, secondary weight (7) was at first backed down and is lifted, and the aperture row of the steam in the control chamber (5) on aperture on the separate seat (6) and valve gap (8) is to atmosphere, and the pressure in the control chamber (5) descends rapidly.Because main weight (3) is gone up the throttling action of aperture, make between control chamber (5) and the steam generator system and form pressure difference, system pressure is higher than control chamber pressure, main weight (3) overcomes gravity and is backed down and lift under the system pressure effect, and drive seal ring (4) together rises, the interior ring and the outer shroud of dicyclo seat (2) are opened simultaneously, the steam inlet is directly communicated with steam (vapor) outlet, steam is arranged to atmosphere.This moment, safety valve was in opening state.Steam generator system pressure descends gradually, secondary weight (7) is sealed the aperture on the separate seat (7) earlier under action of gravity again, pressure in the control chamber (5) rises rapidly again, main weight (3) and seal ring (4) fall under vapor pressure and action of gravity again simultaneously, simultaneously steam inlet and outlet are sealed, safety valve is returned to closed condition again.
The present invention compared with prior art has following advantage:
1, simple and compact for structure, number of spare parts is few, and each part precision requires low, easy to manufacture, with low cost.
2, steam inlet and outlet opening and closing simultaneously, sealing is tight reliable, does not have and leaks.
3, no spring part, no drag seal, thus stable and reliable for performance, long service life.
4, weight is contained in the valve body, can not fly off, and is safe and reliable.
5, volume is small and exquisite, and is in light weight.
The present invention also can be used for equipment such as compressor, pressurized container except being used for steam boiler, be no more than a kind of safety attachment of specified value as restriction system pressure.Except that being used for steam, also can be used in water, other medium of wet goods.
Present embodiment is that internal thread is installed the connection pattern, also can make flange connection type as required.
Claims (3)
1, the differential dual hammer safety valve that uses on a kind of steam boiler, mainly form by valve body, main weight, secondary weight, separate seat, seal ring, dicyclo seat, valve gap etc., the inner chamber that it is characterized in that said valve body (1) has two weights, main weight (3) and secondary weight (7), the centre is provided with separate seat (6), respectively there is an aperture centre of said main weight (3) and separate seat (6), is provided with dicyclo seat (2) on valve body (1), is with seal ring (4) in main weight (3) outside.
2, by the safety valve of claim 1, it is characterized in that valve body (1) bottom is provided with circular groove, and communicate with horizontal steam (vapor) outlet.
3, by the safety valve of claim 1, it is characterized in that main weight (3) bottom is conical surface shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202383 CN2074407U (en) | 1990-02-27 | 1990-02-27 | Bi-weight defferential-pressure-type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202383 CN2074407U (en) | 1990-02-27 | 1990-02-27 | Bi-weight defferential-pressure-type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2074407U true CN2074407U (en) | 1991-04-03 |
Family
ID=4883804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90202383 Withdrawn CN2074407U (en) | 1990-02-27 | 1990-02-27 | Bi-weight defferential-pressure-type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2074407U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108291654A (en) * | 2015-07-29 | 2018-07-17 | 戈布勃利有限公司 | Valve |
| CN108518519A (en) * | 2018-04-23 | 2018-09-11 | 科堡科技（江苏）有限公司 | Electromagnetic valve |
| CN110552660A (en) * | 2018-06-04 | 2019-12-10 | 中国石油天然气股份有限公司 | Well opening and closing device |
-
1990
- 1990-02-27 CN CN 90202383 patent/CN2074407U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108291654A (en) * | 2015-07-29 | 2018-07-17 | 戈布勃利有限公司 | Valve |
| US11118689B2 (en) | 2015-07-29 | 2021-09-14 | Gobubl Limited | Valve |
| CN108518519A (en) * | 2018-04-23 | 2018-09-11 | 科堡科技（江苏）有限公司 | Electromagnetic valve |
| CN108518519B (en) * | 2018-04-23 | 2024-01-30 | 科堡科技（江苏）有限公司 | Electromagnetic valve |
| CN110552660A (en) * | 2018-06-04 | 2019-12-10 | 中国石油天然气股份有限公司 | Well opening and closing device |
| CN110552660B (en) * | 2018-06-04 | 2022-01-04 | 中国石油天然气股份有限公司 | Well opening and closing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |