CN107990012B - Structure is protected in the pressure balance of distribution box - Google Patents
Structure is protected in the pressure balance of distribution box Download PDFInfo
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- CN107990012B CN107990012B CN201711270221.0A CN201711270221A CN107990012B CN 107990012 B CN107990012 B CN 107990012B CN 201711270221 A CN201711270221 A CN 201711270221A CN 107990012 B CN107990012 B CN 107990012B
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- 230000005389 magnetism Effects 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 8
- 238000004880 explosion Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000011981 development test Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Safety Valves (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
A kind of pressure balance protection structure of distribution box, the cabinet including distribution box, cabinet are equipped with relief valve, and the circular mounting hole is provided in box roof, and the relief valve includes circular valve seat, round valve deck, and the middle section of round valve deck offers venthole；Multiple air holes are offered in the fringe region of circular valve seat, offer a vertical guide hole in the central area of circular valve seat；A vertical guide rod can be installed vertically movablely in vertical guide hole, vertical guide rod is fixedly connected with magnetic valve block and power-assisted piece, the fixation magnetic patch of circular ring shape is also fixedly installed in the lower part of valve chamber, fixed magnetic patch is identical as both magnetic valve blocks magnetic pole magnetic adjacent to each other and forms that identical charges repel each other, and the edge position of magnetic valve block is made to be pressed in round valve deck venthole edge position lower section；The curie point of the magnetism valve block and fixed magnetic patch is 70 DEG C~105 DEG C.The present invention can be realized after other equipment outside distribution box explode, and inner and outer air pressure is always maintained at balance.
Description
Technical field
The invention belongs to the technical fields of electric power system power distribution equipment, and in particular to a kind of pressure balance protection of distribution box
Structure.
Background technique
In the power system, some distribution box executes unique control function, belongs to core control equipment, thus right
Security reliability requires high, it is necessary to consider and solve the problems, such as following both sides:
One, the position of distribution box installation is usually located at narrower space, and there is fire prevention spray facility in space, thus usually
It needs strictly to seal, prevents that dust or steam enter, to avoid there are the accidents such as electric short circuit, electric leakage, arc spark；
Two, since there are the wind that explodes caused by various electric short circuits or other factors for electrical equipments other in installation space
Danger, if upon explosion accident occurs for other electrical equipments around the distribution box, distribution box ambient air pressure is steeply risen, and distribution
It being still maintained due to sealing inside case as normal pressure, huge internal and external pressure difference will generate very big pressure to distribution box tank wall,
And then impact failure is caused to distribution box, cause the damage of distribution box tank wall or function impaired, thus the safe operation to equipment
Cause very big indirect impact；
For above-mentioned both sides problem, applicant once attempted that the relief valve 2 of spring is arranged in the cabinet 1 of distribution box,
The Spring-Loaded Pressure Relief Valve 2 includes spring 30 and valve block 28, as shown in Figure 1, valve block 28 is pressed in the inside of relief valve air inlet 24, is put down
When spring 30 apply outside elastic force to valve block 28, valve block 28 blocks the air inlet 24 of relief valve, realization prevent dust enter
Purpose；On the other hand, when explosion accident occurs for distribution box periphery, extraneous huge gas pressure overcomes 30 elastic force of spring,
Valve block 28 is inwardly pushed open, extraneous high pressure gas is made to enter the inner cavity of distribution box 1, thus reaches the flat of 1 inner and outer air pressure of distribution box
Weighing apparatus, to achieve the purpose that distribution box is not destroyed by draught head.
However, applicant has found above-mentioned pressure balance protection structure during development test, there are to be improved to ask
Topic, it is specific as follows: after the external world explodes, can be divided into according to the movement response of relief valve with the next stage: the first stage, quick-fried
Fried just to have occurred in a flash, 1 peripheral pressure of distribution box increases (high pressure is indicated with G), and relief valve is not yet opened, and is pressed inside distribution box 1
Power smaller (low pressure is indicated with D) is as shown in Figure 1；Second stage, relief valve 2 are opened by external pressure, distribution box internal pressure with
Increase, as shown in Figure 2；Phase III, distribution box inside and peripheral pressure basically reach balance, all reach high pressure, just because of
Internal and external pressure balance, therefore 30 elastic force of spring plays leading role again, blocks valve block 28 again the air inlet of relief valve,
As shown in figure 3, relief valve 2 is re-closing off in the phase III, when closing, distribution box is inside and outside is in high pressure conditions；4th
Stage, the high pressure gas outside distribution box 1 dissipate around, and the air pressure outside distribution box reverts to normal pressure therewith rapid decrease
(becoming low pressure D), but it (is still high pressure G), the air pressure inside distribution box is instead that the air pressure inside distribution box cannot lead off instead
It is much higher than external pressure, this draught head instead more compresses spool 28, the more locking of air inlet 24.Therefore in fourth order
Section, the air pressure inside and outside distribution box becomes imbalance again instead, and internal air pressure is greater than external pressure, and fourth stage is held
The continuous time is relatively long, and (above-mentioned front three phases will be only fully completed in seconds, and fourth stage can continue
More than dozens of minutes).Fourth stage it is this for a long time it is poor compared with hyperbar can equally make distribution box tank wall deformation even damage, separately
It is also easy to influence the normal performance of various electrical components in high temperature and pressure for a long time inside outer distribution box.
In addition, applicant during development test, also has found the pressure balance protection knot of above-mentioned Spring-Loaded Pressure Relief Valve again
Structure has the disadvantage that one, in order to ensure the air inlet of relief valve seals, and the elastic force of spring must be sufficiently large, but if spring
Elastic force is too big, then explodes when occurring, and the opening action of relief valve shows slightly slow sluggishness, and relief valve is being beaten completely from being just opened to
It opens and needs to expend one section of long period, and this period is exactly at the time of protecting the extremely delicate and dangerous situation of distribution box；, whereas if in order to
So that the opening of relief valve is more changed up speed, then spring force must be greatly lowered, thus will affect sealing performance；Two, relief valve
After opening, the clast or spark that surrounding explosion generates are easy to by bringing secondary make trouble inside the direct spirt distribution box of relief valve
Therefore.
Summary of the invention
It is an object of the invention to the pressure balances for overcoming disadvantages mentioned above and providing a kind of distribution box to protect structure, it can
After realizing that other equipment outside distribution box are exploded, distribution box inner and outer air pressure is always maintained at balance.
Its purpose can be realized by following scheme: a kind of pressure balance protection structure of distribution box, the case including distribution box
Body, cabinet are equipped with wall box, box baseplate, box roof, and cabinet offers circular mounting hole, is equipped at circular mounting hole
Relief valve is mainly characterized by, and the circular mounting hole is provided in box roof, the relief valve include circular valve seat,
Round valve deck, circular valve seat are fixedly mounted in the circular mounting hole of box roof, and round valve deck is screwedly mounted on above circular valve seat,
Circular valve seat and round valve deck are formed as valve chamber between the two；
The middle section of round valve deck offers venthole；Multiple air holes are offered in the fringe region of circular valve seat,
A vertical guide hole is offered in the central area of circular valve seat；One can be equipped with vertically movablely in vertical guide hole vertically to lead
Expose above round valve deck the upper end of bar, vertical guide rod；
Vertical guide rod is fixedly connected with magnetic valve block and power-assisted piece, and magnetic valve block, power-assisted piece are synchronous with vertical guide rod three
Vertically movable, wherein magnetic valve block is located inside valve chamber, power-assisted piece is located above round valve deck, the horizontal projected area of power-assisted piece
It is equivalent to 4~6 times of magnetic valve block；
It is also fixedly installed with the fixation magnetic patch of circular ring shape in the lower part of valve chamber, both fixed magnetic patch and magnetic valve block lean on mutually
Close magnetic pole magnetic it is identical and formed identical charges repel each other；Fixed magnetic patch applies upward repulsive force to magnetic valve block, makes magnetic valve block
Edge position is pressed in below round valve deck venthole edge position, and magnetic valve block is by the ventilation maskaperture mask of round valve deck；Round valve
Vertical distance between lid and fixed magnetic patch is less than the vertical distance between power-assisted piece and round valve deck；The magnetism valve block and solid
The curie point for determining magnetic patch is 70 DEG C~105 DEG C.
Vertical clear distance is equivalent to vertical net between power-assisted piece and magnetic valve block between round valve deck venthole and fixed magnetic patch
Away from 0.4~0.6 times.
So-called curie point, also referred to as Curie temperature or magnetic transformation point refer to that material changes between ferromagnet and paramagnet
Temperature, it may also be said to be occur second-order phase transistion transition temperature.It is magnetic when the temperature of magnetic material is close to Curie-point temperature
The magnetism of substance fades away；When the temperature of magnetic material is higher than Curie-point temperature, the magnetism of the magnetisable material is completely disappeared.
The present invention has the following advantages and effects:
One, under normal operating condition, magnetic valve block is located at the upper end of its stroke under the magnetic repulsion force effect of fixed magnetic patch,
By the ventilation maskaperture mask of round valve deck, therefore relief valve is in completely enclosed state, prevents extraneous dust or steam from entering and matches
Inside electronic box.
Two, explosion time occurs for other equipment outside distribution box, and external air pressure moment increases (first stage), external
Air pressure overcome magnetic force to push down on magnetic valve block, so that relief valve is opened (second stage) rapidly, make the inner and outer air pressure of distribution box
It is rapidly reached balance, avoids distribution box tank wall due to sealing and is destroyed by the powerful draught head in prolonged inside and outside.
Three, after relief valve is opened (phase III), the magnetic valve block of relief valve and fixed magnetic patch touch external high temperature
Gas, under heat radiation and conduction of heat, the temperature of magnetic valve block and fixed magnetic patch is increased rapidly, near or above curie point
Temperature makes magnetic valve block and the magnetism of fixed magnetic patch disappear or completely disappear substantially, upward row of the fixed magnetic patch to magnetic valve block
Repulsion disappears, and body inside and outside air pressure is in a basic balance at this time, and then magnetic valve block under the effect of gravity, is maintained at its vertically movable row
The lower end of journey is in an open state relief valve holding, is achieved in body inside and outside air pressure and is always maintained at balance.In addition, subsequent
Process (fourth stage) in, with cabinet extraneous explosion generate air pressure dissipate, due to this stage relief valve be still within beat
Open state, (compared with Spring-Loaded Pressure Relief Valve, the high temperature of box house is high for rapid dispersion therewith for the high temperature and high pressure gas of box house
Calm the anger body dissipation speed it is faster).After the high temperature and high pressure gas of box house dissipates, temperature declines (the 5th stage), magnetic
Property valve block and the magnetic of fixed magnetic patch restore, magnetic valve block re-moves the upper end of its stroke under magnetic repulsion force effect, weight
Newly by the ventilation maskaperture mask of round valve deck.
Four, the first, second stage of portion's explosion, external high pressure gas not only impact magnetic valve block outside the enclosure, equally
Also power-assisted piece can be impacted, power-assisted piece is linked together with magnetic valve block, and the area for bearing gas pressure intensity is equivalent to magnet valves
4~6 times of piece, thus the dynamics that power-assisted piece can make air blast open magnetic valve block increases 4~6 times, makes magnetic valve block
The opportunity of opening earlier, speed faster, amplitude it is bigger, this is conducive to reduce cabinet internal and external pressure difference more quickly.
Five, power-assisted piece can be greatly lowered clast or spark and pass through the danger inside the direct spirt I &C equipment case of relief valve
Danger.
Detailed description of the invention
Fig. 1 is the schematic diagram using the distribution box of Spring-Loaded Pressure Relief Valve in normal operating condition.
Fig. 2 is the status diagram of second stage of the relief valve after the external world explodes in Fig. 1.
Fig. 3 is the status diagram of phase III of the relief valve after the external world explodes in Fig. 1.
Fig. 4 is the status diagram of fourth stage of the relief valve after the external world explodes in Fig. 1.
Fig. 5 is a kind of overall structure diagram of the specific embodiment of the present invention in normal operating condition.
Fig. 6 is the schematic diagram of the section structure of the relief valve in Fig. 5.
Fig. 7 is the decomposition texture schematic diagram of the relief valve in Fig. 6.
Fig. 8 is the schematic perspective view of the relief valve in Fig. 6.
Fig. 9 is the valve opening state schematic diagram of structure shown in Fig. 5.
Specific embodiment
Shown in Fig. 5, Fig. 6, the pressure balance protection structure of the distribution box includes the cabinet 1 of distribution box, and cabinet 1 is equipped with cabinet
Side wall 10, box baseplate 11, box roof 12, box roof 12 offer circular mounting hole, are equipped with and let out at circular mounting hole
Pressure valve 2, the relief valve 2 include circular valve seat 21, round valve deck 22, and circular valve seat 21 is fixedly mounted on the circle of box roof 12
In shape mounting hole, nut 31 has been screwed outside round valve deck 22, the fixation of circular valve seat 21 is screwed in box roof 12 by nut 31,
And round valve deck 22 is then screwedly mounted on 21 top of circular valve seat, circular valve seat 21 and round valve deck 22 are formed as valve chamber between the two
23；The middle section of round valve deck 22 offers venthole 24；
Shown in Fig. 7, Fig. 6, Fig. 8, multiple air holes 25 are offered in the fringe region of circular valve seat 21, in circular valve seat
Central area offers a vertical guide hole 26；A vertical guide rod 27 can be installed in vertical guide hole 26 vertically movablely, erect
Expose above round valve deck 22 to the upper end of guide rod 27；Vertical guide rod 27 is fixedly connected with magnetic valve block 28 and power-assisted piece 29,
Magnetic valve block 28, power-assisted piece 28 and vertical 27 three of guide rod are synchronous vertically movable, wherein magnetic valve block 28 is located at 23 the inside of valve chamber,
Power-assisted piece 29 is located at round 22 top of valve deck (being located at 23 outside of valve chamber certainly), and the horizontal projected area of power-assisted piece 29 is equivalent to magnetic
6 times of property valve block；
Shown in Fig. 7, Fig. 6, Fig. 8, the fixation magnetic patch 20 of circular ring shape, fixed magnetic patch are also fixedly installed in the lower part of valve chamber 23
20 is identical as both magnetic valve blocks 28 magnetic pole magnetic adjacent to each other and form that identical charges repel each other；The magnetic valve block 28 of 20 pairs of fixed magnetic patch
Apply upward repulsive force, is pressed in the edge position of magnetic valve block 28 below round 24 edge position of valve deck venthole, magnet valves
Piece 28 covers the venthole 24 of round valve deck；Vertical clear distance between round valve deck venthole 24 and fixed magnetic patch 20 is equivalent to
The half of vertical clear distance between power-assisted piece 29 and magnetic valve block 28；The curie point of the magnetism valve block and fixed magnetic patch is 80 DEG C.
The use principle of above-described embodiment is as follows:
One, under normal operating condition, magnetic valve block 28 is located at its stroke under the magnetic repulsion force effect of fixed magnetic patch 20
The venthole 24 of round valve deck is covered in upper end, therefore relief valve 2 is in completely enclosed state, prevents extraneous dust or water
Vapour enters distribution box cavity 13, as shown in Figure 5, Figure 6.
Two, explosion time occurs for other equipment outside distribution box, and external air pressure moment increases (first stage), external
Air pressure overcome magnetic force to push down on magnetic valve block 28, make relief valve 2 rapidly open (second stage), make the inner cavity 13 of distribution box
It is rapidly reached balance with external pressure, the gas for avoiding distribution box (including tank wall) powerful by prolonged inside and outside due to sealing
Pressure difference destroys, as Fig. 9 shows.
Three, after relief valve 2 is opened (phase III), the magnetic valve block 28 of relief valve and fixed magnetic patch 20 touch outside
High-temperature gas, under heat radiation and conduction of heat, the temperature of magnetic valve block 28 and fixed magnetic patch 20 is increased rapidly, is approached or super
Curie-point temperature is crossed, so that magnetic valve block and the magnetism of fixed magnetic patch is disappeared or is completely disappeared substantially, fixed magnetic patch 20 is to magnet valves
The upward repulsive force of piece 28 disappears, and body inside and outside air pressure is in a basic balance at this time, and then magnetic valve block 28 under the effect of gravity, is kept
In the lower end of its vertically movable stroke, it is in an open state the holding of relief valve 2, that is, remains state shown in Fig. 9, is achieved in case
Inside and outside air pressure is always maintained at balance.In addition, in subsequent process (fourth stage), with the gas of cabinet extraneous explosion generation
Pressure dissipate, the high temperature and high pressure gas of cabinets cavity 13 therewith quick pressure releasing dissipate (compared with Spring-Loaded Pressure Relief Valve, box house
The dissipation speed of high temperature and high pressure gas is faster).(the 5th rank after high temperature and high pressure gas of box house dissipates, temperature declines
Section), magnetic valve block 28 and the magnetic of fixed magnetic patch 20 are restored, and magnetic valve block 28 re-moves its row under magnetic repulsion force effect
The venthole 24 of round valve deck is covered again, is restored to state shown in Fig. 5, Fig. 6 by the upper end of journey.
In above-described embodiment, the curie point of the magnetism valve block and fixed magnetic patch is readily modified as 70 DEG C or 105 DEG C.
Vertical clear distance is readily modified as being equivalent to power-assisted piece 29 and magnetism between round valve deck venthole 24 and fixed magnetic patch 20
0.4 times or 0.6 times of vertical clear distance between valve block 28.
The horizontal projected area of power-assisted piece 29 is readily modified as 4 times that are equivalent to magnetic valve block or 6 times.
Claims (2)
1. structure, the cabinet including distribution box are protected in a kind of pressure balance of distribution box, cabinet is equipped with wall box, cabinet bottom
Plate, box roof, cabinet offers circular mounting hole, is equipped with relief valve at circular mounting hole, is mainly characterized by, described
Circular mounting hole is provided in box roof, and the relief valve includes circular valve seat, round valve deck, and circular valve seat is fixedly mounted on
In the circular mounting hole of box roof, round valve deck is screwedly mounted on above circular valve seat, and circular valve seat and round valve deck are between the two
Be formed as valve chamber；
The middle section of round valve deck offers venthole；Multiple air holes are offered in the fringe region of circular valve seat, in circle
The central area of shape valve seat offers a vertical guide hole；A vertical guide rod can be installed vertically movablely in vertical guide hole,
Expose above round valve deck the upper end of vertical guide rod；
Vertical guide rod is fixedly connected with magnetic valve block and power-assisted piece, and magnetic valve block, power-assisted piece are synchronous with vertical guide rod three vertical
Mobile, wherein magnetic valve block is located inside valve chamber, power-assisted piece is located above round valve deck, and the horizontal projected area of power-assisted piece is suitable
In 4~6 times of magnetic valve block；
It is also fixedly installed with the fixation magnetic patch of circular ring shape in the lower part of valve chamber, both fixed magnetic patch and magnetic valve block are adjacent to each other
Magnetic pole magnetic it is identical and formed identical charges repel each other；Fixed magnetic patch applies upward repulsive force to magnetic valve block, makes the edge of magnetic valve block
Position is pressed in below round valve deck venthole edge position, and magnetic valve block is by the ventilation maskaperture mask of round valve deck；Round valve deck with
Vertical distance between fixed magnetic patch is less than the vertical distance between power-assisted piece and round valve deck；The magnetism valve block and fixed magnetic
The curie point of block is 70 DEG C~105 DEG C.
2. structure is protected in the pressure balance of the distribution box according to claim 1, it is characterised in that: round valve deck venthole
Vertical clear distance is equivalent to 0.4~0.6 times of vertical clear distance between power-assisted piece and magnetic valve block between fixed magnetic patch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270221.0A CN107990012B (en) | 2017-12-05 | 2017-12-05 | Structure is protected in the pressure balance of distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270221.0A CN107990012B (en) | 2017-12-05 | 2017-12-05 | Structure is protected in the pressure balance of distribution box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107990012A CN107990012A (en) | 2018-05-04 |
| CN107990012B true CN107990012B (en) | 2019-09-10 |
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ID=62036048
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711270221.0A Active CN107990012B (en) | 2017-12-05 | 2017-12-05 | Structure is protected in the pressure balance of distribution box |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111457151B (en) * | 2019-01-22 | 2022-11-18 | 上海汽车集团股份有限公司 | Decompression valve and battery pack |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201683712U (en) * | 2010-04-09 | 2010-12-29 | 美的集团有限公司 | Adjustable magnetic pressure-limiting exhaust valve |
| NO336213B1 (en) * | 2010-12-17 | 2015-06-15 | Vetco Gray Scandinavia As | Submarine facility |
| CN202788414U (en) * | 2012-08-06 | 2013-03-13 | 葛洪正 | Temperature-sensitive magnetic force fireproof door releaser |
| CN203413193U (en) * | 2013-07-02 | 2014-01-29 | 河北兆唐燃气设备制造有限公司 | Magnetic fireproof switch |
| US9441749B1 (en) * | 2013-09-28 | 2016-09-13 | Kelso Technologies, Inc. | Vacuum relief valve |
| CN104879400A (en) * | 2015-03-27 | 2015-09-02 | 中煤张家口煤矿机械有限责任公司 | Reusable fusible plug for hydraulic coupling |
| CN205140528U (en) * | 2015-11-17 | 2016-04-06 | 赣榆县脱普仪表销售有限公司 | Smart meter gas -tight silo |
| CN206072461U (en) * | 2016-09-22 | 2017-04-05 | 陕西华电蒲城发电有限责任公司 | A kind of automatic air compensating valve |
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| Publication number | Publication date |
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| CN107990012A (en) | 2018-05-04 |
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