CN204828818U - Pressure -release valve - Google Patents
Pressure -release valve Download PDFInfo
- Publication number
- CN204828818U CN204828818U CN201520506837.3U CN201520506837U CN204828818U CN 204828818 U CN204828818 U CN 204828818U CN 201520506837 U CN201520506837 U CN 201520506837U CN 204828818 U CN204828818 U CN 204828818U
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- fixed
- valve bonnet
- flange
- valve
- spring
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Abstract
The utility model discloses a pressure -release valve for oil immersible power transformer uses. The mold is fixed on the disk seat, and the centre accompanies the circle, and the offset plate center is equipped with and is marked the pole, and it has interior spring and outer spring outward to mark the pole, marks the pole for locking screw and lock nut and fixes, and with bolt and countersunk screw fixed bolster, interior spring in the support is fixed outside and above the spring to the adjusting ring, the outermost is its characterized in that of valve bonnet: soket head cap screw fixes in the valve bonnet outside and marks the pole contact for the travel switch, leads oily neck flange cover on the flange end of valve bonnet. It is fixed with the offset plate on the oily neck to lead. The flange of leading oily neck is sealed with the rubber ring with the flange joint department of valve bonnet. The valve bonnet is an one shot forming stainless steel dustcoat, with fix with screw for the support. The utility model discloses the switch changes into externally by built -in, and wiring, simple to operate save time and the expense for maintenance. It is scalable to lead oily neck mounting flange longitudinal separation, angle can be adjusted, and the direction can 360 degrees rotations. The installation is nimble convenient, practices thrift man -hour.
Description
Technical field
The utility model relates to transformer technology field, and exactly it is a kind of pressure relief valve used for oil-immersed power transformer.
Background technique
Indispensable accessory in earth pressure release valve type transformer; in oil-filled electric transformer is in operation and breaks down; because coil is overheated; a part of transformer oil is vaporized; in oil tank of transformer, pressure increases sharply; at this moment pressure relief valve rapid action in 2ms, release pressure, the protection unlikely distortion of fuel tank or explosion.When pressure in fuel tank raises and reaches cracking pressure, pressure relief valve should action again, until the pressure in fuel tank will to normal value.Owing to can reliably close after earth pressure release valve events, the water and air outside fuel tank can not enter fuel tank, and inside transformer can not be subject to pollution of atmosphere.The switch of existing pressure relief valve is built-in, and it is convenient all not that wiring is installed, and maintenance cost is high.The bad adjustment of Oil Guide neck.
Summary of the invention
The purpose of this utility model is to provide a kind of pressure relief valve, uses for oil-immersed power transformer.It comprises mould, valve bonnet, position limit switch, locking screw, Adjusting ring, support, mark rod, Inner spring, outer spring, cushion rubber, Oil Guide neck, offset plate and valve seat, mould is fixed on valve seat, centre accompanies circle, mark rod is equipped with at offset plate center, interior spring and outer spring is had outside mark rod, mark rod locking screw and locking nut are fixed, and with bolt and sunk screw fixed support, Adjusting ring is fixed on above interior spring in support and outer spring; Outermost is valve bonnet, it is characterized in that: position limit switch socket head screw is fixed on outside valve bonnet and contacts with mark rod, and Oil Guide neck flange sleeve is on the flange end of valve bonnet.Oil Guide neck is fixed with offset plate.The flange of Oil Guide neck and the flange connections rubber sealing of valve bonnet.Valve bonnet is once-through stainless steel outer cover, is screwed with support.
The utility model has the advantages that:
Valve bonnet is all steel protective housing, changes once-through stainless steel outer cover into by primary aluminum alloy, beautiful shape, firm in structure, and anti-corrosion capacity is strong.Switch changes external into by built-in, wiring, easy for installation, for maintenance is saved time and expense
Oil Guide neck mounting flange longitudinal separation is scalable, angle adjustable, and direction can 360 degree of rotations.Convenient and flexible installation, saves man-hour.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the worm's eye view of Fig. 1.
Embodiment
The utility model is the technological scheme that repetition test and improvement on the basis of existing technology draw.Comprise mould, valve bonnet, position limit switch, locking screw, Adjusting ring, support, mark rod, Inner spring, outer spring, cushion rubber, Oil Guide neck, offset plate and valve seat, mould 19 is fixed on valve seat 1, centre accompanies circle 18, mark rod 7 is equipped with at offset plate center, interior spring 6 and outer spring 5 is had outside mark rod 7, mark rod 7 locking screw 11 and locking nut 14 are fixed, and with bolt 16 and sunk screw 15 fixed support 8, Adjusting ring 10 is fixed on above interior spring 6 in support 8 and outer spring 5; Outermost is that valve bonnet 17 is characterized in that: position limit switch 12 socket head screw 13 is fixed on outside valve bonnet 17 and contacts with mark rod 7, and Oil Guide neck 3 flange sleeve is on the flange end of valve bonnet 17.Oil Guide neck 3 is fixed with offset plate 2.The flange of Oil Guide neck 3 and the flange connections cushion rubber 4 of valve bonnet 17 seal.Valve bonnet 17 is once-through stainless steel outer covers, fixes with support 8 screw 9.Position limit switch adopts through being adapted as hermetically sealed outdoor accessory, reaches IP67 grade.Utility model works principle is same as the prior art.Because transformer coil is overheated, a part of transformer oil is vaporized, and in oil tank of transformer, pressure increases sharply; promotion mark rod moves up, and makes the position limit switch action be in contact with it, and makes pressure relief valve rapid action in 2ms; release pressure, the protection unlikely distortion of fuel tank or explosion.When pressure in fuel tank raises and reaches cracking pressure, pressure relief valve should action again, until the pressure in fuel tank will to normal value.Spring reliable reset can be relied on after earth pressure release valve events.Water and air outside fuel tank can not enter fuel tank, and inside transformer can not be subject to pollution of atmosphere.
Claims (4)
1. pressure relief valve, it comprises mould, valve bonnet, position limit switch, locking screw, Adjusting ring, support, mark rod, Inner spring, outer spring, cushion rubber, Oil Guide neck, offset plate and valve seat, mould (19) is fixed on valve seat (1), centre accompanies circle (18), mark rod (7) is equipped with at offset plate center, interior spring (6) and outer spring (5) is had outside mark rod (7), mark rod (7) locking screw (11) and locking nut (14) are fixed, with bolt (16) and sunk screw (15) fixed support (8), Adjusting ring (10) is fixed on interior spring (6) in support (8) and outer spring (5) top, outermost is valve bonnet (17), it is characterized in that: position limit switch (12) is fixed on valve bonnet (17) outside with socket head screw (13) and contacts with mark rod (7), and Oil Guide neck (3) flange sleeve is on the flange end of valve bonnet (17).
2. pressure relief valve according to claim 1, is characterized in that: Oil Guide neck (3) is fixed with offset plate (2).
3. pressure relief valve according to claim 1, is characterized in that: the flange of Oil Guide neck (3) and the flange connections cushion rubber (4) of valve bonnet (17) seal.
4. pressure relief valve according to claim 1, is characterized in that: valve bonnet (17) is once-through stainless steel outer cover, fixes with support (8) screw (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520506837.3U CN204828818U (en) | 2015-07-14 | 2015-07-14 | Pressure -release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520506837.3U CN204828818U (en) | 2015-07-14 | 2015-07-14 | Pressure -release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204828818U true CN204828818U (en) | 2015-12-02 |
Family
ID=54686421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520506837.3U Active CN204828818U (en) | 2015-07-14 | 2015-07-14 | Pressure -release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204828818U (en) |
-
2015
- 2015-07-14 CN CN201520506837.3U patent/CN204828818U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |