CN107834420A - A kind of switch cubicle pressure relief device - Google Patents
A kind of switch cubicle pressure relief device Download PDFInfo
- Publication number
- CN107834420A CN107834420A CN201711168113.2A CN201711168113A CN107834420A CN 107834420 A CN107834420 A CN 107834420A CN 201711168113 A CN201711168113 A CN 201711168113A CN 107834420 A CN107834420 A CN 107834420A
- Authority
- CN
- China
- Prior art keywords
- air chamber
- venting
- relief device
- dust explosion
- pressure relief
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a kind of switch cubicle pressure relief device, mechanism chamber, air chamber, cable vault, pressure release passage are divided into switch cubicle, the air chamber is interior filled with insulation gas, and pressure relief device is provided between the lower wall and pressure release passage of the air chamber；Pressure relief device includes the support being fixed on air chamber lower wall and circular venting of dust explosion diaphragm, and the edge of venting of dust explosion diaphragm is provided with least one trimming.The edge of venting of dust explosion diaphragm is provided with three trimmings, three trimmings, 120 degree of angles each other on circumferential position.Support is fixed on air chamber lower wall by the cultivation nail on nut and the air chamber lower wall, and support pushes down venting of dust explosion diaphragm and O-ring seal on air chamber lower wall, and the inner edge of O-ring seal is provided with back-up ring.Support is manufactured by aluminium or plastics.When plenum interior pressure reaches design load, venting of dust explosion diaphragm is easy to eject, and reaches the purpose of pressure release.
Description
Technical field
The present invention relates to a kind of switch cubicle, more particularly to a kind of switch cubicle pressure relief device.
Background technology
Switchgear is widely used in circuit protection and the segmentation of power system, but electric arc inside switch apparatus failure
It is very harmful, not only switching devices cause directly to damage, and it is also possible to directly threaten personal safety.Totally enclosed type
Gas insulation switch cabinet (also known as switch cubicle, ring main unit etc.) is widely used in power network.One sub-high pressure live components are all close
It is enclosed in metal enclosed plenum interior, gas of the plenum interior filled with insulation, such as sulfur hexafluoride gas, dry air, nitrogen
Deng.When plenum interior, which breaks down, produces electric arc, electric energy is quickly converted to heat energy, causes ambient air temperature to raise, pressure
Increase.The continuous rapid expanding of ambient gas, and then very big impulsive force is produced to air chamber or even whole cabinet, similar to blast.
Moreover, the high temperature of electric arc can often burn neighbouring gas chamber sidewall even cabinet, threaten outside operator's
Safety.In order to reduce harm caused by interior unit cell model, cabinet can keep out certain impact and carry except to there is firm shell
Outside the effect of lotus, pressure relief device is typically also equipped with, when internal pressure exceedes design load, pressure relief device is opened side by side
Go out the gas of HTHP, pass through the impulsive force for reducing surge pressure to reduce to air chamber.
Prior art mainly has two kinds, and one kind ejects mode for diaphragm, and another kind tears mode for diaphragm.
Diaphragm ejection mode pushes down diaphragm by sealing ring, and when plenum interior pressure is excessive, diaphragm is rushed by pressure and deformed
Until ejection, so as to form pressure release passage.
Diaphragm tear mode is by stamping notch on diaphragm in advance, and when pressure is excessive, notch is torn apart.Either
There is notched teeth around diaphragm, cut off when diaphragm is ejected by pressure by notched teeth.
The shortcomings that prior art：
The shortcomings that existing diaphragm ejection mode is that venting of dust explosion diaphragm is not easy to eject, pressure relief values disunity, it is difficult to control
In certain limit, sometimes up to design pressure value does not also eject.In addition, most of diaphragm is circle, when pressure so that diaphragm becomes
Shape to a certain extent when, diaphragm could depart from sealing ring ejection.But due to flow of metal and disunity, so stripping pressure
Not necessarily, often there is the phenomenon that bullet does not go out.
Diaphragm tear mode depends on manufacturing process, and when technique does not reach requirement, diaphragm tends not to tear.The above two
Kind situation all can cause air chamber to bear excessive pressure, cause device damage, or even personnel are damaged.
The content of the invention
It is an object of the invention to provide a kind of safe and reliable switch cubicle pressure relief device.
The purpose of the present invention is achieved through the following technical solutions：
The switch cubicle pressure relief device of the present invention, mechanism chamber, air chamber, cable vault, pressure release passage are divided into switch cubicle,
Filled with insulation gas in the air chamber, pressure relief device is provided between the lower wall and pressure release passage of the air chamber；
The pressure relief device includes the support being fixed on air chamber lower wall and circular venting of dust explosion diaphragm, the venting of dust explosion film
The edge of piece is provided with least one trimming.
As seen from the above technical solution provided by the invention, switch cubicle pressure release dress provided in an embodiment of the present invention
Put, because the edge of venting of dust explosion diaphragm is provided with least one trimming, when plenum interior pressure reaches design load, venting of dust explosion diaphragm is easy to bullet
Go out, reach the purpose of pressure release.
Brief description of the drawings
Fig. 1 is the structural representation of switch cubicle side view in the embodiment of the present invention；
When Fig. 2 is that plenum interior produces electric arc in the embodiment of the present invention, the schematic diagram of pressure release；
Fig. 3 a are the present invention looks up structural representation of pressure relief device in the embodiment of the present invention；
Fig. 3 b are Fig. 3 a A-A to structural representation；
Fig. 4 is the planar structure schematic diagram of venting of dust explosion diaphragm in the embodiment of the present invention；
Fig. 5 is venting of dust explosion film ejection process schematic diagram in the embodiment of the present invention；
Fig. 6 a are the floor map of venting of dust explosion diaphragm deformation in the embodiment of the present invention.
Fig. 6 b are the side schematic view of venting of dust explosion diaphragm deformation in the embodiment of the present invention.
In figure：
1st, mechanism chamber, 2, wall bushing, 3, cable vault, 4, pressure release passage, 5, pressure relief device, 6, air chamber, 7, bus,
8th, switch element, 9, gases at high pressure caused by electric arc, 10, air chamber lower wall, 11, support, 12, O-ring seal, 13, back-up ring, 14,
Nut, 15, the cultivation nail on air chamber wall, 16 venting of dust explosion diaphragms, 16a, trimming, 16b, gauffer.
Embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to prior art known to professional and technical personnel in the field.
The switch cubicle pressure relief device of the present invention, its preferable embodiment are：
Mechanism chamber, air chamber, cable vault, pressure release passage are divided into switch cubicle, the air chamber is interior filled with insulation gas, institute
State and pressure relief device is provided between the lower wall of air chamber and pressure release passage；
The pressure relief device includes the support being fixed on air chamber lower wall and circular venting of dust explosion diaphragm, the venting of dust explosion film
The edge of piece is provided with least one trimming.
The edge of the venting of dust explosion diaphragm is provided with three trimmings, three trimmings, 120 degree of angles each other on circumferential position.
The support is fixed on the air chamber lower wall by the cultivation nail on nut and the air chamber lower wall, and the support will
Venting of dust explosion diaphragm and O-ring seal are pushed down on the air chamber lower wall, and the inner edge of the O-ring seal is provided with back-up ring.
The support is manufactured by aluminium or plastics.
The switch cubicle pressure relief device of the present invention, when plenum interior pressure reaches design load, venting of dust explosion diaphragm is easy to eject,
Reach the purpose of pressure release.
Specific embodiment：
As shown in figure 1, being the side view of switch cubicle, switch cubicle is divided into several compartments, and all live components of high pressure are (female
Line 7, switch element 8) it is installed in inside air chamber 6, filled with insulation gas in air chamber.Cable is in cable vault 3, by through walls
Sleeve pipe 2 forms connection electrically with the bus 7 in air chamber.Mechanism chamber 1 is equipped with the operating mechanism of Operation switch element 8.
As shown in Fig. 2 when gases at high pressure 9 caused by plenum interior electric arc, pressure release fills 5 and puts opening, HTHP
Gas is discharged in pressure release passage 4 from plenum interior.
As shown in Figure 3 a, 3 b, it is the composition of pressure relief device 5, aluminum or plastic support 11 are fixed on air chamber
On lower wall 10, fixed by the cultivation nail 15 on nut 14 and air chamber wall, and O-ring seal 12 is pushed down venting of dust explosion diaphragm 16 and air chamber
Lower wall 10, so as to ensure the air-tightness of air chamber.The purpose of back-up ring 13 is spacing, prevents O-ring seal deformation from running out.
As shown in figure 4, the present invention is different from being characterized mainly in that for other diaphragms ejection mode, on circular venting of dust explosion diaphragm 16
There are three trimming 16a, mutual angle is 120 degree.
As shown in figure 5, when plenum interior produces excess pressure, venting of dust explosion diaphragm 16 is deformed under the effect of the pressure.
As shown in Fig. 6 a, Fig. 6 b, when reaching design pressure, trimming 16a still presses just off sealing ring, remainder
Under sealing ring.Under the effect of the pressure, three trim portions, which can produce, downward is deformed into gauffer 16b.
It can reduce the diameter of circular venting of dust explosion diaphragm by deformation, the part pushed down by sealing ring can also depart from, and so let out
Quick-fried diaphragm can quickly eject support.
The beneficial effect that technical solution of the present invention is brought：
By the trimming on venting of dust explosion diaphragm, sealing ring is left before three trimmings allowed on venting of dust explosion film, is then formed at trimming
Deformed region so that circular venting of dust explosion diaphragm diameter is reduced, and such remainder also can eject rapidly.By checking, venting of dust explosion film
Piece can accurately eject in the range of relative pressure 0.1MPa-0.2MPa.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (4)
1. a kind of switch cubicle pressure relief device, it is characterised in that mechanism chamber, air chamber, cable vault, pressure release are divided into switch cubicle
Passage, the air chamber is interior filled with insulation gas, and pressure relief device is provided between the lower wall and pressure release passage of the air chamber；
The pressure relief device includes the support being fixed on air chamber lower wall and circular venting of dust explosion diaphragm, the venting of dust explosion diaphragm
Edge is provided with least one trimming.
2. switch cubicle pressure relief device according to claim 1, it is characterised in that the edge of the venting of dust explosion diaphragm is provided with
Three trimmings, three trimmings, 120 degree of angles each other on circumferential position.
3. switch cubicle pressure relief device according to claim 2, it is characterised in that the support passes through nut and described
Cultivation nail on air chamber lower wall is fixed on the air chamber lower wall, and the support pushes down venting of dust explosion diaphragm and O-ring seal described
On air chamber lower wall, the inner edge of the O-ring seal is provided with back-up ring.
4. according to the switch cubicle pressure relief device described in claim 1,2 or 3, it is characterised in that the support is by aluminium or modeling
Material is manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168113.2A CN107834420A (en) | 2017-11-21 | 2017-11-21 | A kind of switch cubicle pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168113.2A CN107834420A (en) | 2017-11-21 | 2017-11-21 | A kind of switch cubicle pressure relief device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107834420A true CN107834420A (en) | 2018-03-23 |
Family
ID=61653271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711168113.2A Pending CN107834420A (en) | 2017-11-21 | 2017-11-21 | A kind of switch cubicle pressure relief device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107834420A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3743562A1 (en) * | 1987-12-22 | 1989-07-13 | Asea Brown Boveri | Electrical switching or distributer installation which is encapsulated in a pressure-tight manner and has a bursting protection device |
| CN102620019A (en) * | 2011-01-25 | 2012-08-01 | 施耐德电器工业公司 | Pressure limiting valve |
| EP2515316A1 (en) * | 2011-04-22 | 2012-10-24 | Schneider Electric Industries SAS | Device for limiting the pressure inside a tank housing an electrical protection apparatus, and electrical protection apparatus comprising such a device. |
| CN103001139A (en) * | 2012-12-14 | 2013-03-27 | 广西银河迪康电气有限公司 | Pressure relief device for gas insulation switch device |
| CN203398615U (en) * | 2013-09-09 | 2014-01-15 | 东盟电气集团浙江开关有限公司 | Gas insulated switchgear |
-
2017
- 2017-11-21 CN CN201711168113.2A patent/CN107834420A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3743562A1 (en) * | 1987-12-22 | 1989-07-13 | Asea Brown Boveri | Electrical switching or distributer installation which is encapsulated in a pressure-tight manner and has a bursting protection device |
| CN102620019A (en) * | 2011-01-25 | 2012-08-01 | 施耐德电器工业公司 | Pressure limiting valve |
| EP2515316A1 (en) * | 2011-04-22 | 2012-10-24 | Schneider Electric Industries SAS | Device for limiting the pressure inside a tank housing an electrical protection apparatus, and electrical protection apparatus comprising such a device. |
| CN103001139A (en) * | 2012-12-14 | 2013-03-27 | 广西银河迪康电气有限公司 | Pressure relief device for gas insulation switch device |
| CN203398615U (en) * | 2013-09-09 | 2014-01-15 | 东盟电气集团浙江开关有限公司 | Gas insulated switchgear |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
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| RJ01 | Rejection of invention patent application after publication |