CN201277357Y - Anti-adhesion pressure release valve - Google Patents
Anti-adhesion pressure release valve Download PDFInfo
- Publication number
- CN201277357Y CN201277357Y CNU2008200154654U CN200820015465U CN201277357Y CN 201277357 Y CN201277357 Y CN 201277357Y CN U2008200154654 U CNU2008200154654 U CN U2008200154654U CN 200820015465 U CN200820015465 U CN 200820015465U CN 201277357 Y CN201277357 Y CN 201277357Y
- Authority
- CN
- China
- Prior art keywords
- relief valve
- pressure relief
- coherent
- pressure
- rubber ring
- 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 provides an anti-coherent pressure relief valve which plays a protective role to an oil box of a transformer. The technical problem which is solved is that a top rubber ring on the a valve seat normally adopts nitrile rubber, after a packing ring is installed for certain time, the packing ring and a membrane disc of the pressure relief valve easily generate coherent phenomena, thereby generating the phenomena that the ageing effect opening pressure of the pressure relief valve is bigger than the standard regulated range, the valve can not be opened in time to release pressure in the oil box, and deformation or explosion of the oil box of the transformer is generated. The key points of the anti-coherent pressure relief valve are that a layer of fluoroplymer coating is arranged on the surface of the top rubber ring to form an anti-coherent top rubber ring. The anti-coherent pressure relief valve is characterized in that fluoroplymer dope is coated on the surface of the top rubber ring, and the timing effect opening of the pressure relief valve can be guaranteed effectively and accurately.
Description
Technical field
The utility model belongs to the parts or the assembly of oil-filled electric transformer, and it is installed on the fuel tank case lid or sidewall of transformer, when tank pressure meets or exceeds specified value, and a kind of device that oil tank of transformer is shielded.
Background technique
At present; what the pressure protective device of oil immersed transformer adopted is a kind of pressure relief valve; its objective is: when making the oil tank for oil immersion type transformer internal pressure surpass safety limit, be not damaged, its internal pressure is discharged for the protection oil tank of transformer because of failure and other reasons.The structure of pressure relief valve is: valve seat, membranous disc, spring, valve bonnet and stage clip pad, marker post and electrical switch etc. that seal ring is housed.Its deficiency is: the top cushion rubber on the valve seat generally adopts nitrile butadiene rubber, pinning phenomenon appearred in membranous disc easy and pressure relief valve after the sealing circle was installed a period of time, thereby the timeliness cracking pressure overgauge predetermined range that pressure relief valve occurs, when causing the oil tank of transformer internal pressure to reach the cracking pressure value of pressure relief valve, its valve can not in time be opened the pressure that discharges in the fuel tank, causes transformer oil carton deformed or explosion.Influence the normal operation of transformer.
Summary of the invention
For overcoming the deficiency of prior art, the purpose of this utility model is to provide a kind of anti-loading pressure relief valve.
The purpose of this utility model is achieved in that the top cushion rubber of pressure relief valve adopts nitrile butadiene rubber compression moulding, is characterized in that: have a strata fluorine compound coating to constitute anti-bonding top cushion rubber on the surface of top cushion rubber.Solved the sticking and problem of relief valve top cushion rubber and membranous disc, and can reach the requirement of pressure relief valve seal parameters index, made pressure relief valve realize fully fuel tank internal is carried out the effect that pressure discharges.
The utility model compared with prior art, its advantage is: owing to scribble poly-fluorine compound coating on the surface of top cushion rubber, make the timeliness of pressure relief valve open performance and obtain effectively, accurately improve, the timeliness cracking pressure value of assurance pressure relief valve meets standard-required.And, significantly improve seal ring life-span and oil resistance, guarantee the safe operation of transformer.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is a schematic representation of the present utility model.
Fig. 2 is the sectional view of anti-bonding top cushion rubber.
Embodiment
Referring to Fig. 1, anti-bonding top cushion rubber 2 is arranged on the pressure relief valve valve seat 1, referring to Fig. 2, anti-bonding top cushion rubber 2 is to have a strata fluorine compound coating 21 to constitute on the surface of top cushion rubber 22.The 3rd, membranous disc.
Claims (1)
1, a kind of anti-loading pressure relief valve has pressure relief valve, and the top cushion rubber is arranged on the valve seat, it is characterized in that: have a strata fluorine compound coating to constitute anti-bonding top cushion rubber on the surface of top cushion rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200154654U CN201277357Y (en) | 2008-09-09 | 2008-09-09 | Anti-adhesion pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200154654U CN201277357Y (en) | 2008-09-09 | 2008-09-09 | Anti-adhesion pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277357Y true CN201277357Y (en) | 2009-07-22 |
Family
ID=40894942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200154654U Expired - Fee Related CN201277357Y (en) | 2008-09-09 | 2008-09-09 | Anti-adhesion pressure release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201277357Y (en) |
-
2008
- 2008-09-09 CN CNU2008200154654U patent/CN201277357Y/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20160909 |