CN110224329B - Switch cabinet with closed baffle mechanism - Google Patents
Switch cabinet with closed baffle mechanism Download PDFInfo
- Publication number
- CN110224329B CN110224329B CN201910635459.1A CN201910635459A CN110224329B CN 110224329 B CN110224329 B CN 110224329B CN 201910635459 A CN201910635459 A CN 201910635459A CN 110224329 B CN110224329 B CN 110224329B
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- gas flow
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 88
- 230000008859 change Effects 0.000 claims abstract description 15
- 239000007791 liquid phase Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000012071 phase Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000012782 phase change material Substances 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 208000024780 Urticaria Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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)
- Patch Boards (AREA)
Abstract
The invention discloses a switch cabinet with a closed baffle mechanism, which comprises a switch cabinet body, a frame base body and a sealing plate baffle mechanism, wherein the frame base body is provided with a sealing plate; the buffer chamber is internally provided with a Venturi-shaped gas flow passage structure, an inlet of the gas flow passage structure is communicated with the buffer channel, and a solid-liquid phase change material is filled in the wall of the gas flow passage structure; according to the invention, by improving the structure of the closed baffle mechanism and adding the Venturi-shaped gas flow passage structure, an independent buffer space is formed, the impact on the lap joint of the closed baffle is reduced, the smooth pressure difference characteristic is provided, the turbulence degree is reduced, the release and the transmission of arcing energy are facilitated, the stability is high, the phase change material is arranged in the gas flow passage structure, the Venturi-shaped characteristic is combined, the phase change material is facilitated to take away the temperature part in the arcing energy, the reliability of the lap joint of the sealing plate is improved, and the potential safety hazard of the switch cabinet in the process of arc pressure relief is solved.
Description
Technical Field
The invention relates to the technical field of electric power application, in particular to a switch cabinet with a closed baffle mechanism.
Background
In the actual operation of the switch cabinet, the metal closed switch cabinet has defects, and arc faults can occur in the switch cabinet due to the fact that the insulation performance is deteriorated or misoperation is caused by severe operation conditions. The electric arc generated by the short circuit has high temperature and large energy, the electric arc is a plasma gas with extremely light mass, and the electric arc can move at high speed in the cabinet under the action of electrodynamic force and hot gas, so that the fault range is rapidly enlarged. Under the condition, the insulating material is gasified, the metal is melted, the temperature and the pressure in the switch cabinet are suddenly increased, if a qualified pressure release channel is not designed or installed, the huge pressure can cause serious deformation and even fracture of a cabinet body partition board, a door plate, a hinge and an observation window, and high-temperature air flow generated by an electric arc is sprayed out of the cabinet body, so that operation and maintenance personnel nearby equipment are seriously burned, and even life safety is endangered. The existing operation equipment has the problems that no pressure release channel is arranged, the pressure release channel is unreasonable to be arranged, the internal arc release capacity is not verified by the test, the examination is not strict, and the like.
Chinese patent application number 201721825162.4 discloses a supply an arcing pressure release channel structure, sets up labyrinth type buffer channel in shrouding overlap joint department, prevents the possibility of blowout through shrouding overlap joint department when arcing energy releases. The labyrinth type buffer channel is formed between the sealing plate lining plates, so that the flow resistance of the arcing energy is effectively increased, a small amount of the arcing energy after weakening enters the buffer chamber after passing through the buffer channel, and the arcing energy is further weakened.
In the above-mentioned patent document, the buffer chamber has included shrouding overlap joint, after the arc burning energy gets into the buffer chamber, only reduces the pressure of arc burning energy through flow resistance, but the arc burning energy still exists pressure and temperature, under the condition that the temperature does not obtain in time release and alleviate, can carry out the double impact of pressure and temperature to shrouding overlap joint, the reliability of messenger's shrouding overlap joint reduces, exists the risk of follow shrouding overlap joint blowout when the arc burning energy release.
Disclosure of Invention
The invention provides a switch cabinet with a closed baffle mechanism, which improves the reliability of the lap joint of a sealing plate so as to solve the potential safety hazard of the switch cabinet during the pressure relief of an internal combustion arc.
Switch cabinet with seal baffle mechanism, including the switch cabinet body, still include:
the frame base body is used for being connected with a cabinet body of the switch equipment, and the top of the frame base body is provided with a pressure relief plate;
the sealing plate baffle mechanism is connected with the frame matrix in a sealing way; the sealing plate assembly comprises at least two sealing plates, each sealing plate comprises a sealing plate panel and a sealing plate lining plate arranged on the inner side surface of the sealing plate panel, and a buffer chamber is formed between the sealing plate lining plate and the sealing plate panel; the adjacent sealing plate panels are connected in a sealing way, and a buffer channel is formed between the adjacent sealing plate lining plates;
The buffer chamber is internally provided with a Venturi-shaped gas flow passage structure, an inlet of the gas flow passage structure is communicated with the buffer channel, a solid-liquid phase change material is filled in the wall of the gas flow passage structure, and the phase change temperature of the solid-liquid phase change material is between 30 ℃ and 80 ℃.
Further, the gas flow channel structure is provided with an inlet section, a throat and a diffusion section, wherein the inlet section is connected with the throat through a channel which is gradually reduced along the inlet to the outlet, and the throat is connected with the diffusion section through a channel which is gradually reduced along the inlet to the outlet.
Still further, the lateral wall of entry section is provided with the insert section, insert section inserts on corresponding shrouding welt lateral wall, be provided with the dispersion passageway of intercommunication cubical switchboard body inner space and entry section in the insert section.
Still further, the inner diameter of the dispersion channel has a tapered shape in a direction from the inner space of the switch cabinet body to the inlet section.
Further, the sealing plate lining plate comprises a lining plate shell with side surfaces at the periphery, and the buffer chamber is formed between the lining plate shell and the sealing plate panel; the lower side surface of the lining plate shell extends downwards to form an extension section; when adjacent shrouding welts are buckled, the extension section of upper shrouding welt is inserted to the last side of lower shrouding welt, form the buffering passageway between extension section and the last side.
Furthermore, the insertion end of the upper side surface of the sealing plate lining plate is inclined upwards and forms an included angle with the horizontal direction.
Furthermore, a plurality of pressure relief channels communicated with the buffer channels and the gas flow channel structure are arranged on the upper side face of the sealing plate lining plate.
Furthermore, the pressure-relieving channel is of an L-shaped structure and is provided with an inlet section, a transition section and an outlet section, the inlet section is communicated with the pressure-relieving channel and is connected with the transition section, the other end of the transition section is communicated with the outlet section, the outlet section is arranged in a downward inclined mode so that the gas outlet direction and the upper side face of the sealing plate lining plate form an alpha inclination angle, and the inclination angle alpha range is 15-45 degrees.
Still further, the inner diameter of the entry section has a tapered shape in the direction of the buffer channel to the transition section, the corners of the transition section having a rounded transition.
Further, the solid-liquid phase-change material is Na 2CO3·10H2 O, and the phase-change temperature is 32 ℃; na 2SO4·10H2 O with a melting point of 32.4 ℃; na 2PO4·12H2 O, the melting point of which is 35 ℃, and the melting point of which is one or more of 44.2 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by improving the structure of the closed baffle mechanism and adding the Venturi-shaped gas flow channel structure, an independent buffer space is formed, so that impact on the lap joint of the closed baffle is reduced, the smooth pressure difference characteristic is realized, the turbulence degree is reduced, the release and the transmission of the arcing energy are convenient, the stability is high, the phase change material is arranged in the gas flow channel structure, and the temperature part in the arcing energy is conveniently taken away by the phase change material by combining the Venturi-shaped characteristic; meanwhile, the tapered inlet channel is arranged at the inlet of the gas flow channel structure, so that the arcing energy is reduced in advance, the reliability of the lap joint of the sealing plates is improved, and the potential safety hazard of the switch cabinet in the process of arcing pressure relief is solved.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic view of a positive going structure of a closure barrier structure in accordance with one embodiment of the present invention;
FIG. 3 is an enlarged schematic side cross-sectional view of the present invention at A of FIG. 2;
FIG. 4 is an enlarged schematic view of the present invention at B of FIG. 3;
fig. 5 is an enlarged schematic view of the present invention at C of fig. 3.
Reference numerals illustrate:
0. The switch cabinet comprises a switch cabinet body, 1, a frame matrix, 2, a closed baffle mechanism, 21, an upper sealing plate, 211, an upper sealing plate panel, 212, an upper sealing plate lining plate, 22, a middle sealing plate, 221, a middle sealing plate panel, 222, a middle sealing plate lining plate, 23, a lower sealing plate, 3, a gas flow passage structure, 31, an inlet section, 32, a throat, 33, a diffusion section, 4, a pressure relief passage, 41, an inlet section, 42, a transition section, 43, an outlet section, 5, an insertion section, 51 and a dispersion passage.
Detailed Description
One embodiment of the present invention will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.
As shown in fig. 1 to 5, a switch cabinet with a closed baffle mechanism provided in an embodiment of the present invention includes a switch cabinet body 0, and further includes:
A frame base 1 for connection with a cabinet of a switchgear, the top of the frame base 1 being provided with a pressure relief plate (not shown in the drawings);
The sealing plate baffle mechanism is connected with the frame base body 1 in a sealing way; the sealing plate assembly comprises at least two sealing plates, each sealing plate comprises a sealing plate panel and a sealing plate lining plate arranged on the inner side surface of the sealing plate panel, and a buffer chamber is formed between the sealing plate lining plate and the sealing plate panel; as shown in fig. 3, the adjacent sealing plate panels are in sealing connection, so that the tightness of the pressure release channel is effectively ensured, and a buffer channel is formed between the adjacent sealing plate lining plates, so that the impact of arcing energy on the lap joint of the sealing plates is reduced, and the possibility that the arcing energy is sprayed out through the lap joint is reduced; as shown in fig. 1 to 3, in the present embodiment, the number of the sealing plates in the sealing plate baffle mechanism is three, namely, an upper sealing plate 21, a middle sealing plate 22 and a lower sealing plate 23. The upper sealing plate 21 comprises an upper sealing plate panel 211 and an upper sealing plate lining plate 212; the middle seal plate 22 includes a middle seal plate face plate 221 and a middle seal plate liner plate 222; the lower seal plate 23 includes a lower seal plate face plate and a lower seal plate lining plate.
The buffer chamber is internally provided with a Venturi-shaped gas flow passage structure 3, an inlet of the gas flow passage structure 3 is communicated with the buffer channel, a solid-liquid phase change material is filled in the wall of the gas flow passage structure 3, and the phase change temperature of the solid-liquid phase change material is between 30 ℃ and 80 ℃.
In the above-described solution, the frame base 1 is intended to be connected to a cabinet of a switchgear, in this embodiment an air box body. The top of the frame base body 1 is provided with a pressure release plate, and the arcing energy is mainly released through the pressure release plate, and the pressure release plate can adopt the existing structural form, so that the details are not repeated. Meanwhile, the structure of the sealing baffle mechanism 2 is different from that disclosed in China patent with the application number 201721825162.4.
In this embodiment, adjacent closure panels are lap welded, and the upper closure panel is lap welded to the outside of the lower closure panel. During installation, each sealing plate is installed upwards in sequence from the lowest sealing plate. The sealing plates are arranged on the frame base body 1 through studs, and are arranged in the sequence of firstly arranging the lower sealing plate 23, then arranging the middle sealing plate 22 and finally arranging the upper sealing plate 21; the pressure relief plate is mounted on top of the frame base 1 by rivets or studs.
In this embodiment, the gas flow channel structure 3 has an inlet section 31, a throat 32 and a diffuser section 33, the inlet section 31 is connected to the throat 32 through a channel tapering along its inlet to its outlet, and the throat 32 is connected to the diffuser section 33 through a channel tapering along its inlet to its outlet.
When the flow speed of the gas is low, the front end of the gas flow is a paraboloid, and the central flow speed is the fastest; when the flow rate of the gas is high, the front end of the gas flow is a straight surface, and the center flow rate is the fastest. In the embodiment of the invention, the inside of the gas pipeline can be a straight pipeline or, preferably, the inside of the gas pipeline is provided with a Venturi structure, when the inside of the gas pipeline is provided with the Venturi structure, due to the structural characteristic that the two ends of the Venturi taper towards the middle, the gas has the fastest flow speed when flowing through the minimum inner diameter of the Venturi structure, the effective fluency of the pressure release of the whole arcing energy can be ensured, and the occurrence of turbulent flow and impact force are prevented.
In this embodiment, as shown in fig. 5, the side wall of the inlet section 31 is provided with an insertion section 5, the insertion section 5 is inserted into the side wall of the corresponding sealing plate lining board, and a dispersion channel 51 for communicating the internal space of the switch cabinet body 0 with the inlet section 31 is provided in the insertion section 5.
In this embodiment, the inner diameter of the dispersion channel 51 has a tapered shape along the direction from the inner space of the switch cabinet body 0 to the inlet section 31, and plays a role of sharing pressure when the arcing energy is large.
In this embodiment, the sealing plate liner plate includes a liner plate housing having side surfaces around, and the buffer chamber is formed between the liner plate housing and the sealing plate panel; the lower side surface of the lining plate shell extends downwards to form an extension section; when adjacent shrouding welt is buckled, the extension section of upper shrouding welt is inserted to the last side of below shrouding welt, increases pressure release passageway's stability and structural strength, and simple to operate, form the buffering passageway between extension section and the last side.
In this embodiment, the insertion end of the upper side of the sealing plate liner plate is inclined upward and forms an included angle with the horizontal direction, so that the contact area with the arcing gas is increased at the inlet.
In this embodiment, in order to match with the increased contact area, the inlet is restricted, as shown in fig. 4, a plurality of pressure relief channels 4 are disposed on the upper side of the sealing plate lining board, and the pressure relief channels are communicated with the buffer channels and the gas flow channel structure 3.
In this embodiment, the pressure relief channel 4 has an L-shaped structure, and has an inlet section 41, a transition section 42, and an outlet section 43, where the inlet section 41 is connected to the buffer channel and to the transition section 42, the other end of the transition section 42 is connected to the outlet section 43, and the outlet section 43 is inclined downward to make the gas outlet direction form an angle of α with the upper side of the sealing plate lining plate, and the angle of α ranges from 15 ° to 45 °.
In the above-described embodiments, the inlet section 41 and the outlet section 43 are both curves with smooth transitions. The high-pressure air flow entering the section 41 is stopped at the end face of the inlet, the high-pressure air enters the bleed air injection structure of the pressure-reducing channel 4, is injected at high speed from the outlet section 43, enters the venturi-shaped air flow channel structure 3 for the next step of pressure release of arcing energy, and the air flow injected from the outlet section 43 is formed into annular air flow when seen from the side, so that the resistance of leakage flow is increased, and leakage is reduced.
In this embodiment, the inner diameter of the entry section 41 has a tapered shape in the direction of the buffer channel to the transition section 42, and in order to prevent gas stagnation at the corners, the corners of the transition section 42 have a rounded transition in order to reduce the impact force.
In the embodiment, when the arcing energy is released, the temperature in the switch cabinet body is increased, and when the switch cabinet normally operates, the temperature cannot exceed 110 ℃, solid-liquid phase change materials are used, and the characteristics of a venturi structure are combined, so that the heat brought by high-temperature gas can be well absorbed through becoming liquid at high temperature, wherein the solid-liquid phase change materials are Na 2CO3·10H2 O, and the phase change temperature is 32 ℃; na 2SO4·10H2 O with a melting point of 32.4 ℃; na 2PO4·12H2 O, the melting point of which is 35 ℃, and the melting point of which is one or more of 44.2 ℃.
The foregoing disclosure is merely illustrative of some embodiments of the invention, but the embodiments are not limited thereto, and any variations that may be contemplated by one skilled in the art should fall within the scope of the invention.
Claims (6)
1. Switch cabinet with seal baffle mechanism, including the switch cabinet body, its characterized in that still includes:
the frame base body is used for being connected with a cabinet body of the switch equipment, and the top of the frame base body is provided with a pressure relief plate;
The sealing plate baffle mechanism is connected with the frame matrix in a sealing way; the sealing plate baffle mechanism comprises at least two sealing plates, each sealing plate comprises a sealing plate panel and a sealing plate lining plate arranged on the inner side surface of the sealing plate panel, and a buffer chamber is formed between the sealing plate lining plate and the sealing plate panel; the adjacent sealing plate panels are connected in a sealing way, and a buffer channel is formed between the adjacent sealing plate lining plates;
The buffer chamber is internally provided with a Venturi-shaped gas flow passage structure, an inlet of the gas flow passage structure is communicated with the buffer channel, a solid-liquid phase change material is filled in the wall of the gas flow passage structure, and the phase change temperature of the solid-liquid phase change material is between 30 ℃ and 80 ℃;
The gas flow passage structure is provided with an inlet section, a throat and a diffusion section, wherein the inlet section is connected with the throat through a channel which is gradually reduced along the direction from the inlet to the outlet, and the throat is connected with the diffusion section through a channel which is gradually reduced along the direction from the inlet to the outlet;
The sealing plate lining plate comprises a lining plate shell with side surfaces at the periphery, and the buffer chamber is formed between the lining plate shell and the sealing plate panel; the lower side surface of the lining plate shell extends downwards to form an extension section; when adjacent sealing plate lining plates are buckled, the upper side surface of the lower sealing plate lining plate is inserted into the extension section of the upper sealing plate lining plate, and a buffer channel is formed between the extension section and the upper side surface; a plurality of pressure relief channels communicated with the buffer channels and the gas flow channel structure are arranged on the upper side surface of the sealing plate lining plate;
The pressure relief channel is of an L-shaped structure and is provided with an inlet section, a transition section and an outlet section, the inlet section is communicated with the buffer channel and is connected with the transition section, the other end of the transition section is communicated with the outlet section, the outlet section is arranged in a downward inclined mode so that the gas outlet direction and the upper side of the sealing plate lining plate form an alpha inclination angle, and the inclination angle alpha range is 15-45 degrees.
2. A switchgear with a closing flap mechanism according to claim 1 characterized in that: the side wall of the inlet section is provided with an inserting section, the inserting section is inserted into the side wall of the corresponding sealing plate lining plate, and a dispersing channel for communicating the inner space of the switch cabinet body with the inlet section is arranged in the inserting section.
3. A switchgear with a closing flap mechanism according to claim 2, characterized in that: the inner diameter of the dispersion channel has a tapered shape in the direction from the inner space of the switch cabinet body to the inlet section.
4. A switchgear with a closing flap mechanism according to claim 1 characterized in that: the upper side of the sealing plate lining plate is provided with an inserting end which is inclined upwards and forms an included angle with the horizontal direction.
5. A switchgear with a closing flap mechanism according to claim 1 characterized in that: the inner diameter of the entry section has a tapered shape in the direction of the buffer channel to the transition section, with a rounded transition at the corner of the transition section.
6. A switchgear with a closing flap mechanism according to claim 1 characterized in that: the solid-liquid phase change material is Na 2CO3·10H2 O, and the phase change temperature is 32 ℃; na 2SO4·10H2 O with a melting point of 32.4 ℃; na 2PO4·12H2 O, the melting point of which is 35 ℃, and the melting point of which is one or more of 44.2 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910635459.1A CN110224329B (en) | 2019-07-15 | 2019-07-15 | Switch cabinet with closed baffle mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910635459.1A CN110224329B (en) | 2019-07-15 | 2019-07-15 | Switch cabinet with closed baffle mechanism |
Publications (2)
| Publication Number | Publication Date |
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| CN110224329A CN110224329A (en) | 2019-09-10 |
| CN110224329B true CN110224329B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910635459.1A Active CN110224329B (en) | 2019-07-15 | 2019-07-15 | Switch cabinet with closed baffle mechanism |
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| CN (1) | CN110224329B (en) |
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| CN210273299U (en) * | 2019-07-15 | 2020-04-07 | 广东佰林电气设备厂有限公司 | Switch cabinet with closed baffle mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206942866U (en) * | 2017-06-29 | 2018-01-30 | 无锡邦得机械有限公司 | Charge air cooler air chamber |
| CN207743618U (en) * | 2017-12-22 | 2018-08-17 | 青岛特锐德电气股份有限公司 | Arcing pressure release passage structure |
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2019
- 2019-07-15 CN CN201910635459.1A patent/CN110224329B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1955213A (en) * | 1931-03-30 | 1934-04-17 | Electr & Allied Ind Res Ass | Circuit breaker |
| CN107261710A (en) * | 2013-07-05 | 2017-10-20 | 斯塔米卡邦有限公司 | The removal of dust in urea finishing |
| CN205315147U (en) * | 2015-11-23 | 2016-06-15 | 重庆普什机械有限责任公司 | Venturi gas mixing device |
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| CN205960451U (en) * | 2016-07-29 | 2017-02-15 | 天津沃都电气设备有限公司 | Cubical switchboard pressure relief device and cubical switchboard |
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| Publication number | Publication date |
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| CN110224329A (en) | 2019-09-10 |
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