CN110265887A - A kind of adjustable switch cabinet pressure relief device - Google Patents
A kind of adjustable switch cabinet pressure relief device Download PDFInfo
- Publication number
- CN110265887A CN110265887A CN201910573756.8A CN201910573756A CN110265887A CN 110265887 A CN110265887 A CN 110265887A CN 201910573756 A CN201910573756 A CN 201910573756A CN 110265887 A CN110265887 A CN 110265887A
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- Prior art keywords
- switch cabinet
- pressure relief
- vertical cylinder
- relief device
- piston
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Classifications
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- 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
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/306—Accessories, e.g. windows
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a kind of adjustable switch cabinet pressure relief devices, including cohesive component, bottom cover component and piston component；The cohesive component includes vertical cylinder and the top plate that is set at the top of the vertical cylinder, and perforation and at least one gas vent are provided on the top plate；The bottom cover component includes the connection ring being detachably connected with the lower end of the vertical cylinder and the reducing district for being engaged on the connection ring lower end；The piston component, including being located at the piston head of the vertical inner barrel and being fixed on the piston rod of the piston head upper end, several vertical throttling screw holes are distributed on the piston head, the upper end of the piston rod passes through the perforation, and closure assemblies are connected at upper end, ball sealer is additionally provided between the reducing district and the piston head.The present invention effectively can be evacuated and be drained to the high temperature and high pressure gas in switchgear, play the role of quickly, timely pressure-relief explosion-proof, have excellent safety.
Description
Technical field
The present invention relates to electrical equipment technical field, especially a kind of adjustable switch cabinet pressure relief device.
Background technique
Switchgear is a kind of switchgear suitable for electricity consumption occasion, its main function is sent out in electric system
Electricity, transmission of electricity, distribution and electric energy are opened and closed, controlled and are protected during converting, and power plant, substation, stone are mainly used in
The various different occasions such as oiling work, metallurgical steel rolling, industry light industry textile industry, industrial enterprise and residential quarters, skyscraper.
Switchgear during use, interior unit cell model be circuit caused by various reasons short circuit, be switchgear most
Serious failure, electric arc generates fuel factor and pressure effect, if high temperature and high pressure gas cannot be when extremely short in narrow cabinet body
It is interior to be released effectively, it will cause switchgear and burst, injure personal safety.
Existing pressure relief device is that cover board is arranged at the top of switchgear, and one end of cover board is connected by a hinge in switchgear
On, the other end is fixed by nylon screw, when short circuit accident occurs in switchgear, interior gas temperature and pressure in switchgear
It increasing, nylon screw melts because of the high-temperature gas in switchgear, and cover board impact is bounced pressure release by the high pressure gas in switchgear,
But this traditional pressure relief device is influenced by the size of the cover plate, often because pressure release passage is smaller, causes high temperature and high pressure gas
It cannot exclude that switchgear is caused to deform in time, or even the danger burst；In addition, this traditional pressure relief device is in nylon spiral shell
In this period that silk melts, the high temperature and high pressure gas in switchgear is further accumulated, when high temperature and high pressure gas accumulation is too fast,
Although imperial screw can occur not melt completely also, switchgear cannot bear the pressure of internal high temperature high pressure gas and occur quick-fried
Fried, even if nylon screw can be completely melt, high temperature and high pressure gas has accumulated a period of time in inside switch cabinet, and pressure is still
So very big, high temperature and high pressure gas can bounce cover board high speed at this time, cover board around hinge high speed rotation, it is easy to make hinge break,
To which cover board flies out, it is easy to accidentally injure staff, there are security risks；In addition, sealing joint strip can not be arranged at cover board frame
Etc close measure, be easier to that dust is made to enter high pressure compartment pollution high voltage electric conductor, influence built-in electrical insulation intensity, increase short circuit
Failure.
Summary of the invention
The purpose of this section is to summarize some aspects of the embodiment of the present invention and briefly introduce some preferable implementations
Example.It may do a little simplified or be omitted to avoid our department is made in this section and the description of the application and the title of the invention
Point, the purpose of abstract of description and denomination of invention it is fuzzy, and this simplification or omit and cannot be used for limiting the scope of the invention.
The problem of in view of above-mentioned and/or existing pressure relief device of switch cabinet, propose the present invention.
Therefore, the one of purpose of the present invention is to provide a kind of adjustable switch cabinet pressure relief device, can be to switch
High temperature and high pressure gas in cabinet is quickly and efficiently evacuated and is drained.
In order to solve the above technical problems, the invention provides the following technical scheme: a kind of adjustable switch cabinet pressure relief device,
Including cohesive component, bottom cover component and piston component；The cohesive component include vertical cylinder and be set to it is described vertical
Top plate at the top of cylinder, perforation and at least one gas vent are provided on the top plate, and the perforation is located at the top plate
At center；The bottom cover component includes the connection ring being detachably connected with the lower end of the vertical cylinder and is engaged on institute
The reducing district of connection ring lower end is stated, the bottom diameter of the reducing district is less than upper-end inner diameter；The piston component, including it is located at institute
The piston rod stated the piston head of vertical inner barrel and be fixed on the piston head upper end is distributed on the piston head several
A vertical throttling screw hole, the throttling screw hole can be attached blocking by sealing bolt, to control the piston head
The upper end of percent opening, the piston rod passes through the perforation, and closure assemblies are connected at upper end, the reducing district and institute
It states and is additionally provided with ball sealer between piston head, the outer diameter of the ball sealer is greater than the internal diameter of the reducing district lower end.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: the vertical cylinder
Periphery is connected with fixed ring, and the inward flange of the fixed ring at the top of linking area and the vertical cylinder by being attached, institute
It states and air hole is distributed in linking area.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: the fixed ring is distinguished
For inner ring and outer ring, the inner ring is recessed relative to the outer ring, forms fixed bit, and the closure assemblies are embedded in the fixed bit
Top.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: under the closure assemblies
Upper end at the center on surface with the piston rod is detachably connected, and the closure assemblies are sealed in the fixed ring
Portion.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: under the closure assemblies
Screw rod straight down is projected at the center on surface, the upper end of the piston rod has the screw hole for being matched with the screw rod, institute
Closure assemblies are stated to be detachably connected by the upper end of the screw rod and the piston rod.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: the connection ring it is interior
There is internal screw thread on side, there is matched external screw thread on the lateral surface of the vertical cylinder, the bottom cover component passes through
The cooperation of screw thread and the lower end of the vertical cylinder are detachably connected.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: under the reducing district
End has air inlet, and the air inlet is connected to the inside of the vertical cylinder with exterior space formation.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: it further include elastic parts,
The elastic parts is placed on the periphery of the piston rod, the upper end of the elastic parts and the lower surface for resisting the top plate, institute
The lower end for stating the elastic parts resists the upper surface of the piston head.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: outside the piston head
It is provided with vertical sliding slot on side, is provided with the strip bulge for being matched with the sliding slot on the medial surface of the vertical cylinder,
The strip bulge is embedded in the corresponding sliding slot, and opposite vertical sliding can occur.
A kind of preferred embodiment as adjustable switch cabinet pressure relief device of the present invention, in which: the closure assemblies
Formed at center relative to edge it is convex so that forming pressure chamber between the top plate and the closure assemblies.
Beneficial effects of the present invention: the present invention effectively can be evacuated and be arranged to the high temperature and high pressure gas in switchgear
Let out, play the role of quickly, timely pressure-relief explosion-proof, have excellent safety.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the top visual angle explosive view and fragmentary detail view of the adjustable switch cabinet pressure relief device.
Fig. 2 is the lower part visual angle explosive view of the adjustable switch cabinet pressure relief device.
Fig. 3 is that switchgear interior air-flow shores effect schematic diagram to closure assemblies.
Air-flow when Fig. 4 moves upwards for piston component moves towards schematic diagram.
Air-flow when Fig. 5 moves downward for piston component moves towards schematic diagram.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, right with reference to the accompanying drawings of the specification
A specific embodiment of the invention is described in detail.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Secondly, " one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one realization side of the invention
A particular feature, structure, or characteristic in formula." in one embodiment " that different places occur in the present specification not refers both to
The same embodiment, nor the individual or selective embodiment mutually exclusive with other embodiments.
It referring to Fig.1~5, is one embodiment of the present of invention, this embodiment offers a kind of adjustable switch cabinet pressure release dresses
It sets, the top of switchgear, and the high temperature and pressure that can effectively, in the quick drain interior of the cabinet short time generate can be mounted on
Gas.
The adjustable switch cabinet pressure relief device includes cohesive component 100, bottom cover component 200, piston component 300 and envelope
Cap assemblies 400.Need to open up a penetrating mounting hole at the top of switchgear, adjustable switch cabinet pressure relief device is entirely through rank
Connected components 100 are fixed on mounting hole, and bottom cover component 200 is connected to the bottom of cohesive component 100, and closure assemblies 400 cover
On the top of cohesive component 100, in the inside of cohesive component 100 relative motion can occur for piston component 300, and to capping group
Part 400 has the function of resetting.
Specifically, fixed ring 102 of the cohesive component 100 including vertical cylinder 101 and positioned at vertical 101 periphery of cylinder,
Vertical cylinder 101 is hollow cylinder structure, and fixed ring 102 can be for around the horizontal annular structure of vertical cylinder 101 1 circle.Gu
The inward flange for determining ring 102 is attached by linking area 103 and the top of vertical cylinder 101, and linking area 103 is in fixed ring
Loop shaped connector structure between 102 and vertical cylinder 101, linking area 103 is along being evenly distributed with multiple air hole 103a one week.
Cohesive component 100 can be mounted on the mounting hole of switchgear by fixed ring 102, preferably, fixed ring 102 and mounting hole
Edge can be attached by bolt or screw thread is attached, whole convenient for device to realize the detachable of single unit system
Installation, be removed for repair or replacement.
Preferably, fixed ring 102 divides into inner ring 102a and outer ring 102b, and inner ring 102a is recessed relative to outer ring 102b,
The fixed bit 102c of border circular areas is formed, closure assemblies 400 can just be embedded in the top of fixed bit 102c.In addition, recessed
Inner ring 102a can be just in the mounting hole of flush switch cabinet, and outer ring 102b can be shelved on the edge of mounting hole, finally may be used
To be bolted.
The top of vertical cylinder 101 is provided with top plate 104, and top plate 104 can form the upper end of vertical cylinder 101 and seal
Lid.The lower end of vertical cylinder 101 is connected with bottom cover component 200, and the lower end that bottom cover component 200 is capable of vertical cylinder 101 forms envelope
Lid.
Specifically, bottom cover component 200 include the connection ring 201 that is detachably connected with the lower end of vertical cylinder 101 with
And it is engaged on the reducing district 202 of 201 lower end of connection ring, the bottom diameter of reducing district 202 is less than upper-end inner diameter, therefore, reducing district
202 be funnelform hollow structure.Preferably, there is internal screw thread 201a on the medial surface of connection ring 201, vertical cylinder 101
There is matched external screw thread 101a, bottom cover component 200 is realized and vertical cylinder 101 by the cooperation of screw thread on lateral surface
Lower end is detachably connected.Preferably, the lower end of reducing district 202 has air inlet 203, air inlet 203 makes vertical cylinder
101 inside is connected to exterior space formation.
Piston component 300 includes the piston head 301 being located inside vertical cylinder 101 and is fixed on 301 upper end of piston head
Piston rod 302, piston head 301 can carry out vertical sliding in the space between top plate 104 and reducing district 202, and piston
The upper end of bar 302 passes through top plate 104.There is the perforation 104a for being matched with the piston rod 302, piston at the center of top plate 104
Bar 302 passes through perforation 104a and opposite slide can occur.Stroke in order not to cause piston head 301 to move upwards hinders, top
At least one gas vent 104b can be set on plate 104, to prevent can not be successfully excretion after the air compression on 301 top of piston head
And the problem of causing piston head 301 to be difficult to rapid increase.In addition, several vertical penetrating throttlings are distributed on piston head 301
Screw hole 301a, throttling screw hole 301a are the lesser screw hole of bore, transparent, and have screw thread on inner sidewall.
The present invention definition: in vertical cylinder 101, positioned at 301 lower part of piston head space (namely piston head 301 and become
Space between diameter area 202) it is " active chamber Q-1 "；Space (namely piston head 301 and top plate positioned at 301 top of piston head
Space between 104) it is " exhaust chamber Q-2 ".Therefore, throttling screw hole 301a can be by active chamber Q-1 and exhaust chamber Q-2
Connection.
Ball sealer 500 is additionally provided in active chamber Q-1, ball sealer 500 is sphere structure, and outer diameter is greater than air inlet
203 internal diameter, therefore can not fall off.Ball sealer 500 is individually present, and is not connect with other structures, in its natural state can be embedding
Enter in the upper end of air inlet 203, is formed and blocked.Preferably, the lower end of piston head 301 has the recess for being matched with ball sealer 500
301c。
Since gas vent 104b and 203 bore of air inlet are relatively large, when piston head 301 moves upwards, movable chamber
Room Q-1 is by the upward air-breathing of air inlet 203, and ball sealer 500 loosens, while the air in exhaust chamber Q-2 passes through gas vent
104b discharge；Since the aperture of throttling screw hole 301a is relatively small, when piston head 301 moves downward simultaneously activity compression chamber Q-1
When, the upper end of 500 squeezed tight air inlet 203 of ball sealer forms sealing, and the gas in active chamber Q-1 is only capable of passing through throttling
Screw hole 301a excretion, throttling screw hole 301a can allow for the gas slowly in active chamber Q-1 to be emitted into exhaust in communication
In chamber Q-2, the decrease speed of piston component 300 is slowed down with this.
In the present invention, throttling screw hole 301a can be attached blocking by sealing bolt 303, to control the piston
First 301 percent opening.Sealing bolt 303 is the bolt cooperated with throttling screw hole 301a, can screw in and be fixed on work
In any throttling screw hole 301a on chock plug 301.Therefore, it can according to need in practice and block required amount of throttling screw hole
301a indirectly controls the decrease speed of piston component 300 with this.
It is detachably connected at the center of 400 lower surface of closure assemblies with the upper end of piston rod 302, and closure assemblies
400 are sealed on 102 top of fixed ring.Therefore, the piston component 300 of vertical sliding is able to drive closure assemblies 400 and carries out up and down
Movement, realizes the pressure release or closing of switchgear.
After the inside of switchgear generates high pressure gas, gas can enter closure assemblies 400 by air hole 103a
Bottom, and open closure assemblies 400 upwards, realize pressure release；After the completion of pressure release, piston rod 302 to closure assemblies 400 generate to
Under reset response, the active force of the reset response can place one's entire reliance upon the gravity of piston component 300 itself.
Preferably, formed at the center of closure assemblies 400 relative to edge it is convex, and convex configuration be smooth surface
(or spherical surface), therefore hollow pressure chamber Q-3 is capable of forming between top plate 104 and closure assemblies 400.During the pressure relief process,
Rapidly air-flow from air hole 103a can initially enter pressure chamber Q-3, and be directly impinging the inside of closure assemblies 400
On face, convex structure can aid in air-flow and shore effect to closure assemblies 400, so that air-flow is easier closure assemblies
400 strut pressure release.
Further, vertical sliding slot 301b, the medial surface of vertical cylinder 101 are provided on the lateral surface of piston head 301
On be provided with the strip bulge 101b for being matched with sliding slot 301b, strip bulge 101b is embedded in corresponding sliding slot 301b, and can
Opposite vertical sliding occurs, convenient for the slide-and-guide of piston component 300.
It further, further include elastic parts 600 (using compressed spring), elastic parts 600 is placed on the outer of piston rod 302
It encloses, the upper end of elastic parts 600 and the lower surface for resisting top plate 104, the lower end of elastic parts 600 resists the upper of piston head 301
Surface can generate downward reset response power to piston head 301, namely generate reset response to closure assemblies 400 indirectly.This
Invention can according to need the elastic parts 600 for presetting required intensity, to change the pressure release threshold value of warning in switchgear,
That is, gas could resist elastic parts 600 and push closure assemblies 400 only after air pressure increases to the threshold value in switchgear
It moves.
Further, with to be detachably connected between closure assemblies 400 and piston rod 302.Specifically, closure assemblies 400
Screw rod 401 straight down is projected at the center of lower surface, the upper end of piston rod 302 has the screw hole for being matched with screw rod 401
302a, closure assemblies 400 are detachably connected by screw rod 401 and the upper end of piston rod 302.Due to 200 energy of bottom cover component
Enough disassemblies are opened, and piston component 300 can also be disassembled from closure assemblies 400, therefore the present invention can not only replace
The spring of varying strength changes pressure release threshold value of warning, can also be not provided with elastic parts 600, only by replacement different weight
Piston component 300 adjusts pressure release threshold value of warning.Therefore, the present invention can be with multiple elastic parts of mating varying strength specification
600 or multiple piston components 300 of different densities flexibly arrange in pairs or groups use.
In conclusion adjustable switch cabinet pressure relief device of the invention is during the pressure relief process, it is not only able to guarantee capping group
The opening process of part 400 is unaffected, is rapidly completed and (to adapt to the sharply expansion of air pressure, reduces risk), while can also protect
Card closure assemblies 400 are slowly completed in reseting procedure, the risk for preventing the electric arc high frequency in the short time, frequently generating, therefore
It increases the opening time of closure assemblies 400, increase the period of pressure release, more safety.
Based on above-mentioned, the pressure leak process and principle of the adjustable switch cabinet pressure relief device are as follows:
When generating high temperature and high pressure gas in switchgear, gas enters pressure chamber Q-3 by air hole 103a, and directly
On the downside for impacting closure assemblies 400, closure assemblies 400 is pushed to move upwards.The closure assemblies 400 moved upwards pass through
Piston rod 302 drives the upward withdrawing of piston head 301, at this point, the air in switchgear can impact ball sealer by air inlet 203
500, it is opened, and enter active chamber Q-1, since 203 bore of air inlet is larger, air-flow can be can smoothly enter into, and be protected
Demonstrate,prove the upward withdrawing process of piston head 301 quickly, smoothly, namely: the process that closure assemblies 400 move upwards can quickly smoothly
Ground is completed, and guarantees the timeliness of pressure release.The extruding that elastic parts 600 is accompanied by the above process is shunk.
After the completion of pressure release, the pulling force or piston group of piston component 300 and closure assemblies 400 by elastic parts 600
The self weight of part 300 is gradually resetted and (is moved downward), and therefore, the air in active chamber Q-1 will be squeezed, and leads to ball sealer
500 tight closures are in the upper end of air inlet 203, at this point, the air in active chamber Q-1 can only pass through not blocked throttling spiral shell
Hole 301a is drained into exhaust chamber Q-2.Since the aperture of throttling screw hole 301a is smaller, only can allow in active chamber Q-1
Gas slowly be emitted into exterior space, therefore, the process that piston component 300 moves downward be slow process, increase envelope
The opening time of cap assemblies 400, the period for extending pressure release, so that the decompression function of switchgear has more reliability and safety
Property.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferable
Embodiment describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (10)
1. a kind of adjustable switch cabinet pressure relief device, it is characterised in that: including,
Cohesive component (100), including vertical cylinder (101) and the top plate being set at the top of the vertical cylinder (101)
(104), perforation (104a) and at least one gas vent (104b), the perforation (104a) are provided on the top plate (104)
At the center of the top plate (104)；
Bottom cover component (200), including the connection ring (201) that is detachably connected with the lower end of the vertical cylinder (101) with
And it is engaged on the reducing district (202) of the connection ring (201) lower end, the bottom diameter of the reducing district (202) is less than in upper end
Diameter；
Piston component (300), including being located at the internal piston head (301) of vertical cylinder (101) and being fixed on the work
Several vertical throttling screw holes (301a) are distributed on the piston head (301) in the piston rod (302) of chock plug (301) upper end,
The throttling screw hole (301a) can be attached blocking by sealing bolt (303), to control opening for the piston head (301)
The upper end of porosity, the piston rod (302) passes through the perforation (104a), and closure assemblies (400) are connected at upper end,
It is additionally provided between the reducing district (202) and the piston head (301) ball sealer (500), the outer diameter of the ball sealer (500)
Greater than the internal diameter of the reducing district (202) lower end.
2. adjustable switch cabinet pressure relief device as described in claim 1, it is characterised in that: outside the vertical cylinder (101)
It encloses and is connected with fixed ring (102), the inward flange of the fixed ring (102) passes through linking area (103) and the vertical cylinder (101)
Top be attached, air hole (103a) is distributed on the linking area (103).
3. adjustable switch cabinet pressure relief device as claimed in claim 2, it is characterised in that: the fixed ring (102) is divided into
Inner ring (102a) and outer ring (102b), the inner ring (102a) is recessed relative to the outer ring (102b), forms fixed bit
(102c), the closure assemblies (400) are embedded in the top of the fixed bit (102c).
4. adjustable switch cabinet pressure relief device as claimed in claim 2 or claim 3, it is characterised in that: under the closure assemblies (400)
Upper end at the center on surface with the piston rod (302) is detachably connected, and the closure assemblies (400) are sealed on institute
State fixed ring (102) top.
5. adjustable switch cabinet pressure relief device as claimed in claim 4, it is characterised in that: closure assemblies (400) following table
Screw rod (401) straight down is projected at the center in face, the upper end of the piston rod (302), which has, is matched with the screw rod
(401) screw hole (302a), the closure assemblies (400) by the upper ends of the screw rod (401) and the piston rod (302) into
Row is detachably connected.
6. claims 1 to 3 or 5 it is any as described in adjustable switch cabinet pressure relief device, it is characterised in that: the connection ring
(201) there is internal screw thread (201a) on medial surface, there is matched outer spiral shell on the lateral surface of the vertical cylinder (101)
Line (101a), the bottom cover component (200) are detachably connected by the cooperation of screw thread and the lower end of the vertical cylinder (101)
It connects.
7. adjustable switch cabinet pressure relief device as claimed in claim 6, it is characterised in that: the lower end of the reducing district (202)
With air inlet (203), the air inlet (203) forms the inside of the vertical cylinder (101) with the exterior space
Connection.
8. the adjustable switch cabinet pressure relief device as described in claims 1 to 3,5 or 7 are any, it is characterised in that: further include elasticity
Component (600), the elastic parts (600) are placed on the periphery of the piston rod (302), the upper end of the elastic parts (600)
The piston head (301) is resisted with the lower end of the lower surface for resisting the top plate (104), the elastic parts (600)
Upper surface.
9. adjustable switch cabinet pressure relief device as claimed in claim 8, it is characterised in that: the outside of the piston head (301)
It is provided on face vertical sliding slot (301b), is provided on the medial surface of the vertical cylinder (101) and is matched with the sliding slot
The strip bulge (101b) of (301b), the strip bulge (101b) is embedded in the corresponding sliding slot (301b), and can send out
Raw opposite vertical sliding.
10. the adjustable switch cabinet pressure relief device as described in claims 1 to 3,5,7 or 9 are any, it is characterised in that: the envelope
Formed at the center of cap assemblies (400) relative to edge it is convex so that the top plate (104) and the closure assemblies (400)
Between form pressure chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910573756.8A CN110265887B (en) | 2019-06-28 | 2019-06-28 | Adjustable cubical switchboard pressure relief device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573756.8A CN110265887B (en) | 2019-06-28 | 2019-06-28 | Adjustable cubical switchboard pressure relief device |
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| CN110265887A true CN110265887A (en) | 2019-09-20 |
| CN110265887B CN110265887B (en) | 2020-05-29 |
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| CN112103806A (en) * | 2020-08-28 | 2020-12-18 | 国网江苏省电力有限公司泰州供电分公司 | Block terminal is from pressure release protection architecture |
| CN112332244A (en) * | 2020-11-11 | 2021-02-05 | 于家豪 | Split combined type modularization switch board |
| CN112666669A (en) * | 2020-12-31 | 2021-04-16 | 南京升平通信设备有限公司 | Optical cable distributing box capable of being automatically adjusted |
| CN112867349A (en) * | 2020-12-31 | 2021-05-28 | 南京升平通信设备有限公司 | Network rack convenient to heat dissipation |
| CN113460519A (en) * | 2021-06-25 | 2021-10-01 | 中车太原机车车辆有限公司 | Safety indicating device and vehicle suitable for pneumatic powder tank container |
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