CN209146423U - Pressure relief valve - Google Patents
Pressure relief valve Download PDFInfo
- Publication number
- CN209146423U CN209146423U CN201821745102.6U CN201821745102U CN209146423U CN 209146423 U CN209146423 U CN 209146423U CN 201821745102 U CN201821745102 U CN 201821745102U CN 209146423 U CN209146423 U CN 209146423U
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- CN
- China
- Prior art keywords
- mould
- valve
- travel switch
- pressure relief
- relief valve
- 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.)
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Abstract
The utility model discloses a kind of oil-immersed power transformer pressure relief valves, it has the warning function and good leakproofness when pressure slowly increases in oil tank of transformer.It includes: spring, mould axis, valve seat, travel switch, upper cushion rubber, it strikes the post, mould and valve bonnet, pressure relief valve is mounted on oil tank of transformer top surface and reserves on mounting flange, the upper section of mould axis passes through valve base center hole and is mounted below mould, lower section is equipped with spring, side circle is fixed on valve seat using pressing ring and screw to seal, striking the post above mould is located on valve bonnet with axle sleeve and sleeve nut, valve bonnet with drain tap is fixed by bolts on valve seat, on set the side that travel switch is mounted on valve bonnet upper surface, underlying travel switch is mounted on the other side of valve bonnet upper surface, upper cushion rubber is equipped between side circle and pressing ring.The utility model may be mounted on various oil-immersed power transformers.
Description
Technical field:
The utility model relates to transformer technology fields, and exactly, it is a kind of oil-immersed power transformer pressure
Relief valve.
Background technique:
Pressure relief valve is one of indispensable accessory in transformer, when oil-immersed transformer breaks down in operation
When, as the coil overheats, a part of transformer oil vaporization until increasing the pressure in oil tank of transformer rapidly, works as transformer tank
When intracorporal pressure reaches pressure relief valve cracking pressure, pressure relief valve can be opened rapidly in 2ms, release stress, protection
Fuel tank will not deform or burst；Meanwhile having the outflow of pressure relief valve pressure release open signal, take corresponding disposition to arrange for operator
It applies.When the pressure in fuel tank increases again, reaches cracking pressure, pressure relief valve acts again, until the pressure in fuel tank
Until dropping to normal value.Due to can reliably close after pressure relief valve movement, the water and air outside fuel tank not can enter fuel tank,
Inside transformer not will receive atmosphere pollution.
As above it is told, the pressure release signal of pressure relief valve is to release stress process in pressure relief valve in the prior art
Middle sending, and before pressure starts slowly raising, not up to cracking pressure value, it is that no any signal exports.That is: existing
There is technology to lack the function that gives warning in advance when tank pressure slowly increases, to cause certain be stranded to operator's handling failure
It is difficult.Further, since existing pressure relief valve uses plate rubber sealing, sealing effect is also not very ideal.
Summary of the invention
The utility model is the technological improvement to existing pressure relief valve, and purpose is just to provide a kind of with pressure release
Give warning in advance the good pressure relief valve of function, sealing effect.
The purpose of this utility model be achieved in that pressure relief valve include: spring, mould axis, valve seat, side circle,
On set travel switch, axle sleeve, strike the post, mould, pressing ring, valve bonnet and latch bracket, pressure relief valve are mounted on oil tank of transformer top surface
On reserved mounting flange, the upper section of mould axis passes through valve base center hole and is mounted below mould, and lower section is equipped with spring, is used in combination
Latch bracket and nut are fixed, and side circle is fixed on using pressing ring and screw to seal on valve seat, and striking the post above mould uses axle sleeve
It is located on valve bonnet with sleeve nut, striking the post can slide up and down in axle sleeve, and the valve bonnet with drain tap is fixed by bolts to
On valve seat, the side that travel switch is mounted on valve bonnet upper surface with screw is above set, is lined with gasket below, it is characterised in that: underlying
Travel switch is fixed on the other side of valve bonnet upper surface using screw, upper cushion rubber is equipped between side circle and pressing ring, when on mould
When rising, upper cushion rubber inner ring can follow mould to raise together by the elasticity of its own.Travel switch 13 is fixed on stroke and opens 9 phases
Pair position on, it is fixed with screw 21.
It is equipped with upper cushion rubber 16 between side circle 5 and pressing ring 17, when mould 15 rises, the inner ring of upper cushion rubber 16 can be relied on
The elasticity of its own follows mould 15 to raise together.
Upper cushion rubber 16 is to use the section of nitrile rubber manufacture for trapezoidal sealing rubber ring.
The utility model has the advantages that: when the pressure in oil tank of transformer slowly increases, opens in not up to pressure relief valve
Before opening pressure release, i.e., pressure rise signal is exported, remind operator take respective handling method, avoid to the full extent because
The permeability that pressure release generates, causes unnecessary economic loss；Further, since be additionally arranged inner ring can by its own elasticity with
The upper cushion rubber raised with mould, so that the utility model sealing effect is better.
Detailed description of the invention:
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is status diagram when the utility model pressure relief valve opens pressure release.
Specific embodiment
Embodiment 1:
The utility model is the technological improvement to existing pressure relief valve, it is that repetition test solves in long-term practice
Problems of the prior art.In addition to upper cushion rubber 16, travel switch 9 and 13, valve seat 4, mould 15, valve bonnet 19 etc. other zero
Component can use the prior art.Upper cushion rubber 16 can be manufactured using nitrile rubber, it be the utility model inventive point it
One, since its inner ring can follow mould 15 to raise together by the elasticity of its own, so that the sealing of upper cushion rubber 16
Effect is better.
When pressure rise in transformer station high-voltage side bus failure, coil overheat, transformer oil vaporization, oil tank of transformer, mould
Disk 15 overcomes the elastic force of spring 2 to move upwards, and will strike the post 14 jack-up.During mould 15 moves upwards, upper cushion rubber 16 is always
It is contacted with mould 15, until mould 15 is contacted with the disengagement of upper cushion rubber 16, at this time transformer when reaching pressure relief valve cracking pressure
Pressure flows through the gap between the central through hole of valve seat 4, valve seat 4 and mould 15 in fuel tank, finally by the drain tap on valve bonnet 19
Outside 18 discharge cabinets.
If the pressure moment in oil tank of transformer increases, mould 15 can push 14 triggerings of striking the post underlying within a very short time
Travel switch 13 and upper travel switch 9, and successively issue warning signal and open pressure release signal with pressure relief valve, protect fuel tank
It will not deform or burst, while operator being reminded to debug.
Before pressure slowly increases, pressure relief valve opens pressure release in oil tank of transformer, strikes the post and 14 trigger underlying row first
Cheng Kaiguan 13, issues warning signal, and reminds operator to take respective handling method, avoids pressure release, permeability as far as possible, cause not
Necessary economic loss；When the pressure in oil tank of transformer continues to increase, corresponding failure exclusion is not also taken to arrange in operator
In the case where applying, pressure relief valve opens pressure release, strikes the post and 14 triggers set travel switch 9 again, issues pressure relief valve unlatching and lets out
Press signal.
The utility model can be issued warning signal with the method for changing 14 length of striking the post to set underlying travel switch 13
When oil tank of transformer pressure value, generally should be when tank pressure reaches 55kpa, the underlying travel switch 13 of 14 triggerings of striking the post,
It issues warning signal；When oil tank of transformer pressure reaches 70kpa, striking the post 14 should trigger and set travel switch 9, issue pressure and release
It puts valve and opens pressure release signal.On set the height of travel switch 9 and can be adjusted with gasket 8.Travel switch 13 is fixed on stroke
It opens on 9 opposite positions, it is fixed with screw 21.
It is equipped with upper cushion rubber 16 between side circle 5 and pressing ring 17, when mould 15 rises, the inner ring of upper cushion rubber 16 can be relied on
The elasticity of its own follows mould 15 to raise together.
Upper cushion rubber 16 is to use the section of nitrile rubber manufacture for trapezoidal sealing rubber ring.
Under normal circumstances, the utility model is after pre-warning signal sending, before relief valve unlatching pressure release signal sending, operator
Member has enough time debugging.
Claims (4)
1. pressure relief valve, it include: spring (2), mould axis (3), valve seat (4), side circle (5), on set travel switch (9),
Axle sleeve (11) is struck the post (14), mould (15), pressing ring (17), valve bonnet (19) and latch bracket (20), and pressure relief valve is mounted on transformation
Device fuel tank top surface is reserved on mounting flange, and the upper section of mould axis (3) passes through valve seat (4) centre bore and is mounted under mould (15)
Face, lower section are equipped with spring (2), and fixed with latch bracket (20) and nut (1), and it is solid using pressing ring (17) and screw (6) that (5) are enclosed in side
It is scheduled on valve seat (4) to seal, mould (15) striking the post above (14) is located in valve with axle sleeve (11) and sleeve nut (12)
Cover (19) on, strike the post (14) can be slided up and down in axle sleeve (11), with drain tap (18) valve bonnet (19) pass through bolt (7)
It is fixed on valve seat (4), above sets the side that travel switch (9) is mounted on valve bonnet (19) upper surface with screw (10), be lined with below
Gasket (8), it is characterised in that: be equipped with underlying travel switch (13) in the other side of valve bonnet (19) upper surface, travel switch (13)
It is fixed on valve bonnet (19).
2. pressure relief valve according to claim 1, it is characterised in that: travel switch (13) is fixed on travel switch (9)
It is fixed with screw (21) on opposite position.
3. pressure relief valve according to claim 1, it is characterised in that: be equipped between side circle (5) and pressing ring (17) upper
Cushion rubber (16), when mould (15) rise, the inner ring of upper cushion rubber (16) can follow mould (15) one by the elasticity of its own
It rises and raises.
4. pressure relief valve according to claim 1, it is characterised in that: upper cushion rubber (16) are manufactured using nitrile rubber
Section is trapezoidal sealing rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821745102.6U CN209146423U (en) | 2018-10-26 | 2018-10-26 | Pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821745102.6U CN209146423U (en) | 2018-10-26 | 2018-10-26 | Pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209146423U true CN209146423U (en) | 2019-07-23 |
Family
ID=67270891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821745102.6U Active CN209146423U (en) | 2018-10-26 | 2018-10-26 | Pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209146423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185515A (en) * | 2018-10-26 | 2019-01-11 | 沈阳明远电气科技有限公司 | pressure relief valve |
-
2018
- 2018-10-26 CN CN201821745102.6U patent/CN209146423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185515A (en) * | 2018-10-26 | 2019-01-11 | 沈阳明远电气科技有限公司 | pressure relief valve |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |