CN212811091U - Air insulation type switch cabinet - Google Patents
Air insulation type switch cabinet Download PDFInfo
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- CN212811091U CN212811091U CN202021419257.8U CN202021419257U CN212811091U CN 212811091 U CN212811091 U CN 212811091U CN 202021419257 U CN202021419257 U CN 202021419257U CN 212811091 U CN212811091 U CN 212811091U
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Abstract
The utility model provides an environment-friendly air insulation type cubical switchboard includes the cabinet body, the gas tank, the instrument room, mechanism unit, switch unit and linkage unit, the rear portion at the cabinet body is installed to the gas tank, the top at the cabinet body is installed to the instrument room, mechanism unit, switch unit and linkage unit install respectively on the gas tank, a serial communication port, switch unit includes the mounting bracket, insulating switch group, operation pivot and three phase isolation switch, the mounting bracket is installed inside the gas tank, insulating switch group and three phase isolation switch install respectively on the mounting bracket, and insulating switch group is located three phase isolation switch's top, three phase isolation switch's input and mechanism unit connection, insulating switch group has the handle hole that can mutually support with the operation pivot, the operation pivot passes insulating switch group and the work end and the mechanism unit connection of operation pivot, be filled with dry air in the gas tank. The environment-friendly air insulation type switch cabinet is insulated by adopting air, has better insulating property, less pollution to the air and reasonable structure.
Description
Technical Field
The utility model relates to an air insulation type cubical switchboard, more specifically say and relate to one kind can adopt the air insulation, have better insulating properties, less, rational in infrastructure air insulation type cubical switchboard to air pollution.
Background
Chinese patent document with publication number CN 106953264 a discloses an environment-friendly gas-insulated switchgear, which comprises a cabinet body, and is characterized in that: the improved vacuum cabinet is characterized in that a closed air box is arranged in the cabinet body, dry air is filled in the air box, a three-phase isolating switch device and a vacuum circuit breaker device which are connected with each other are arranged in the air box, a cable sleeve is arranged at the lower end of the air box, an installation cabinet is arranged beside the air box, a three-phase isolating switch mechanism, a circuit breaker mechanism and a cable chamber are arranged in the installation cabinet, the three-phase isolating switch mechanism is connected with the three-phase isolating switch device, the circuit breaker mechanism is connected with the vacuum circuit breaker device, and the cable chamber is located below the air box and connected with the three-phase isolating switch device.
The switching device in the traditional switch cabinet has a complex structure and poor electric arc shielding performance, and large electrical distance and creepage distance are needed among three-phase switching devices, so that the volume of the gas-filled cabinet is large, and the occupied area of the gas-filled cabinet is large; moreover, the structure of the switch device is too complex, so that the variety of parts is too many, the assembly by workers is not facilitated, the working efficiency is greatly reduced, and the manufacturing cost of the product is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an air insulation type cubical switchboard, this kind of air insulation type cubical switchboard adopt the insulation switch group that has high electric field shielding performance, make this air insulation type cubical switchboard can guarantee better insulating properties under the insulating condition of adoption dry air to the structure of product has effectively been simplified. The technical scheme is as follows:
the utility model provides an air insulation type cubical switchboard includes the cabinet body, gas tank, instrument room, mechanism unit, switch unit and the linkage unit, and the gas tank is installed at the rear portion of the cabinet body, and the instrument room is installed at the top of the cabinet body, and mechanism unit, switch unit and linkage unit install respectively on the gas tank, its characterized in that, the switch unit includes mounting bracket, insulating switch group, operation pivot and three phase isolation switch, and the mounting bracket is installed inside the gas tank, and insulating switch group and three phase isolation switch install respectively on the mounting bracket to insulating switch group is located three phase isolation switch's top, and three phase isolation switch's input and mechanism unit connection, insulating switch group has the handle hole that can mutually support with the operation pivot, and the operation pivot passes insulating switch group and the work end and the mechanism unit connection of operation pivot, be filled with dry air in the gas tank.
Preferably, the micro-water content of the dry air in the air box is 100-400 ppm.
More preferably, the micro-water content of the dry air in the air box is 300-600 ppm.
In a preferred scheme, the inflation pressure range in the air box is 0-0.02 MPa.
In a more preferable scheme, the inflation pressure value in the air box is 0MPa, namely the air pressure in the air box is the same as the ambient atmospheric pressure. Therefore, the air box can be prevented from being stressed and deformed due to overlarge air pressure, the overall attractiveness of the product is improved, and meanwhile, the reliability, safety, operation continuity and the like of the switch device are also guaranteed.
According to a preferred scheme, the insulation switch group comprises three insulation switches, the three insulation switches are respectively installed on the installation frame from back to front, and each insulation switch comprises a vacuum arc extinguish chamber, a moving contact operation unit, an insulation sleeve and a shielding cover; the vacuum arc extinguish chamber is provided with a moving contact and a fixed contact which are arranged oppositely, and the vacuum arc extinguish chamber is arranged in the insulating sleeve; the moving contact operation unit is arranged on the input end of the moving contact; the shielding cover is provided with an operation hole; the moving contact operation unit is provided with a hexagonal operation hole, the shielding cover surrounds the outside of the moving contact operation unit, and the operation hole is sleeved on the periphery of the hexagonal operation hole.
In a more preferable scheme, the electrical distance between two adjacent insulation switches is 40-90 mm.
In a more preferable scheme, the electrical distance between two adjacent insulated switches is 40 mm.
Preferably, the outer surface of the shielding case is a smooth curved surface. The smooth curved surface of the shielding case means that the surface has no protruding sharp points or convex edges. Through the structure, the point discharge phenomenon and the breakdown phenomenon of the shielding cover can be effectively avoided, and the insulation effect of the product is greatly improved.
Preferably, the bottom of the static contact is provided with a static conductive piece, the three-phase isolating switch is provided with three isolating movable blade groups corresponding to the static conductive pieces of the three isolating switches, each isolating movable blade group comprises two isolating movable blades, and an isolating knife edge capable of being embedded with the static conductive piece is formed between the two isolating movable blades.
Preferably, the insulation switch further comprises two isolation shielding cases, and the two isolation shielding cases are respectively arranged on two sides of the static conductive piece and cover the static conductive piece.
In a more preferable scheme, the outer surface of the isolation shielding case is a smooth curved surface.
In a more preferable scheme, the inner side wall of the isolation moving blade is provided with a conductive contact. When the isolating knife edge and the static conductive piece are mutually embedded, the two isolating movable blades are mutually contacted with the static conductive piece through the conductive contact, so that the contact area between the isolating movable blades and the static contact is greatly reduced, and when the switch cabinet is electrified, the generation of overhigh heat between the isolating movable blades and the static conductive piece can be effectively avoided, and the switch unit is further fused.
According to a preferred scheme, the connecting unit comprises three wall bushing pipes and three copper bars, the three wall bushing pipes are arranged below the air box in a straight line shape, and the three wall bushing pipes are respectively connected with the three phase isolating switches through the three copper bars.
The better scheme, the cabinet body includes mechanism room, cable chamber and pressure release room, the mechanism room is located the top of cable chamber, the pressure release room is located the rear of cable chamber, the gas tank is installed in pressure release room top and the gas tank bottom is equipped with the pressure release hole, and the instrument room is installed in mechanism room top. When the inside short circuit of cubical switchboard, short circuit energy and electric arc that release in the gas tank will discharge through the pressure release hole, then discharge to the back upper place of the cabinet body to operating personnel safety before the protection cabinet.
Compared with the prior art, the utility model has the advantages that the insulating switch with high insulating property is adopted, so that the electric field distribution of the switch unit after electrification can be more uniform in the environment filled with dry air, the electric field intensity is greatly reduced, the interphase and ground distance is reduced, the phenomenon of partial discharge caused by insufficient distance is solved, the switch cabinet can be further miniaturized, and the pollution to the air is greatly reduced; the structure of the product is effectively simplified, the working efficiency is greatly improved, and the manufacturing cost and the maintenance cost are greatly reduced; the isolating movable blade adopts a conductive contact structure, so that the service life of the isolating movable blade and the static conductive piece is greatly prolonged; the pressure relief hole at the bottom of the air box is communicated with the pressure relief chamber of the cabinet body, so that the safety of operators in front of the cabinet can be effectively protected.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of an air tank, a switch unit and a mechanism unit according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a switch unit according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of an insulation switch according to embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of the isolation blade set according to embodiment 1 of the present invention.
Detailed Description
Example 1
As shown in fig. 1 to 5, an air-insulated switchgear includes a cabinet body 1, an air box 2, an instrument room 3, a mechanism unit 4, a switch unit 5 and a connection unit 6, the cabinet body 1 includes a mechanism room 101, a cable room 102 and a pressure relief room 103, the mechanism room 101 is located above the cable room 102, the pressure relief room 103 is located behind the cable room 102, the air box 2 is installed above the pressure relief room 103 and a pressure relief hole 201 is provided at the bottom of the air box 2, the instrument room 3 is installed above the mechanism room 101, and the mechanism unit 4, the switch unit 5 and the connection unit 6 are respectively installed on the air box 2; the mechanism unit 4 includes a circuit breaker mechanism 401 and an isolation mechanism 402, the circuit breaker mechanism 401 and the isolation mechanism 402 are respectively installed on the gas tank 2, the circuit breaker mechanism 401 is connected with the isolation mechanism 402, and the circuit breaker mechanism 401 is located above the isolation mechanism 402; the switch unit 5 comprises a mounting rack 501, an insulating switch group 502, an operation rotating shaft 503 and a three-phase isolating switch 504, wherein the mounting rack 501 is mounted inside the air box 2, the insulating switch group 502 and the three-phase isolating switch 504 are respectively mounted on the mounting rack 501, the insulating switch group 502 is positioned above the three-phase isolating switch 504, the input end of the three-phase isolating switch 504 is connected with the isolating mechanism 402, the insulating switch group 502 is provided with an operation hole 5021 capable of being matched with the operation rotating shaft 503, the operation rotating shaft 503 penetrates through the insulating switch group 502, the working end of the operation rotating shaft 503 is connected with the circuit breaker mechanism 401, and the air box 2 is filled with dry air. When the inside short circuit of cubical switchboard, short circuit energy and electric arc released in the gas tank 2 will be discharged through pressure release hole 201, then discharge to the back upper place of the cabinet body 1 to operating personnel safety before the protection cabinet.
The moisture content of the dry air in the air box 2 is 600 ppm. In a dry air environment containing a relatively high micro-water content, the insulation switch of the air insulation type switch cabinet can have stable insulation performance.
The inflation pressure value in the air box 2 is 0MPa (also called zero gauge pressure), namely the air pressure in the air box 2 is the same as the ambient atmospheric pressure. Therefore, the air tank 2 can be prevented from being stressed and deformed due to overlarge air pressure, the overall attractiveness of the product is improved, and meanwhile, the reliability, safety, operation continuity and the like of the switch device are also guaranteed.
The insulated switch group 502 comprises three insulated switches 51, the three insulated switches 51 are respectively mounted on the mounting frame 501, as shown in fig. 4, the insulated switches 51 comprise a vacuum arc-extinguishing chamber 5101, a moving contact operation unit 5102, an insulated sleeve 5103 and a shielding cover 5104; the vacuum arc extinguish chamber 5101 is provided with a moving contact 51011 and a fixed contact 51012 which are oppositely arranged, and the vacuum arc extinguish chamber 5101 is arranged in an insulating sleeve 5103; the moving contact operation unit 5102 is mounted on an input end of the moving contact 51011; the shielding cage 5104 is provided with an operation hole 5021 in a circular shape; the moving contact operation unit 5102 is provided with a hexagonal operation hole 51021, the shielding cover 5104 surrounds the outside of the moving contact operation unit 5102, and the operation hole 5021 is sleeved on the periphery of the hexagonal operation hole 51021.
The electrical distance between two adjacent insulated switches 51 is 40 mm.
The three insulation switches 51 are respectively an a-phase insulation switch, a B-phase insulation switch and a C-phase insulation switch, and the a-phase insulation switch, the B-phase insulation switch and the C-phase insulation switch are sequentially installed on the installation frame 501 from back to front.
The outer surface of the shielding cage 5104 is a smooth curved surface. The smooth curved surface of the shielding cage 5104 means that the surface has no protruding sharp points or convex edges. Through the structure, the point discharge phenomenon and the breakdown phenomenon of the shielding cover 5104 can be effectively avoided, and the insulation effect of the product is greatly improved.
The three isolated switches 504 are provided with three isolated moving blade sets 5041 corresponding to the three static conductive members 51013, each isolated moving blade set 5041 comprises two isolated moving blades 5042, and an isolated knife edge 5043 which can be mutually embedded with the static conductive members 51013 is formed between the two isolated moving blades 5042, as shown in fig. 5, at the bottoms of the static contacts 51012 of the three isolated switches 51.
The insulated switch 51 further includes two isolation shielding covers 5105, and the two isolation shielding covers 5105 are respectively disposed on two sides of the static conductive member 51013 and cover the static conductive member 51013.
The outer surface of the shielding cage 5105 is a smooth curved surface.
The inner side wall of the isolating movable blade 5042 is provided with a conductive contact 50421. When the isolating knife edge 5043 and the static conductive piece 51013 are mutually embedded, the two isolating movable blades 5042 are mutually contacted with the static conductive piece 51013 through the conductive contact 50421, so that the contact area between the isolating movable blade 5042 and the movable contact 51012 is greatly reduced, and when the switch cabinet is electrified, the generation of overhigh heat between the isolating movable blade 5042 and the static conductive piece 51013 can be effectively avoided, and the switch unit 5 is further fused.
The connecting unit 6 comprises three wall bushing 601 and three copper bars 602, the three wall bushing 601 is installed below the air box 2 in a straight line shape, and the three wall bushing 601 is connected with the three-phase isolating switch 504 through the three copper bars 602 respectively.
Example 2
The air insulated switchgear in this embodiment is different from embodiment 1 in that:
the micro-water content of the dry air in the air box 2 is 100 ppm; the inflation pressure range in the air box 2 is 0.02 MPa; the electrical distance between two adjacent insulated switches 51 is 90 mm.
Example 3
The air insulated switchgear in this embodiment is different from embodiment 1 in that:
the micro-water content of the dry air in the air box 2 is 300 ppm; the inflation pressure range in the air box 2 is 0.02 MPa; the electrical distance between the two adjacent insulated switches 51 is 70 mm.
Example 4
The air insulated switchgear in this embodiment is different from embodiment 1 in that:
the micro-water content of the dry air in the air box 2 is 400 ppm; the inflation pressure range in the air box 2 is 0.01 MPa; the electrical distance between two adjacent insulation switches 51 is 60 mm.
Example 5
The air insulated switchgear in this embodiment is different from embodiment 1 in that:
the micro-water content of the dry air in the air box 2 is 300 ppm; the inflation pressure range in the air box 2 is 0.01 MPa; the electrical distance between two adjacent insulated switches 51 is 50 mm.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. An air insulation type switch cabinet comprises a cabinet body, an air box, an instrument room, a mechanism unit, a switch unit and a connecting unit, wherein the air box is arranged at the rear part of the cabinet body, the instrument room is arranged at the top part of the cabinet body, the mechanism unit, the switch unit and the connecting unit are respectively arranged on the air box, it is characterized in that the switch unit comprises a mounting rack, an insulation switch group, an operation rotating shaft and three phase isolation switches, the mounting rack is arranged in the gas box, the insulation switch group and the three phase isolation switches are respectively arranged on the mounting rack, the insulation switch group is positioned above the three-phase isolating switch, the input end of the three-phase isolating switch is connected with the mechanism unit, the insulation switch group is provided with an operation hole which can be matched with the operation rotating shaft, the operation rotating shaft penetrates through the insulation switch group, the working end of the operation rotating shaft is connected with the mechanism unit, and the air box is filled with dry air.
2. The air insulated switchgear of claim 1, wherein the inflation pressure in the air box is in the range of 0-0.02 MPa.
3. The air-insulated switchgear of claim 1, wherein the insulated switchgear group comprises three insulated switches, the three insulated switches are respectively installed on the mounting frame from back to front, the insulated switches comprise a vacuum interrupter, a movable contact operating unit, an insulated sleeve and a shielding case; the vacuum arc extinguish chamber is provided with a moving contact and a fixed contact which are arranged oppositely, and the vacuum arc extinguish chamber is arranged in the insulating sleeve; the moving contact operation unit is arranged on the input end of the moving contact; the shielding cover is provided with an operation hole; the moving contact operation unit is provided with a hexagonal operation hole, the shielding cover surrounds the outside of the moving contact operation unit, and the operation hole is sleeved on the periphery of the hexagonal operation hole.
4. The air insulated switchgear of claim 3 wherein the electrical distance between two adjacent insulated switches is 40-90 mm.
5. The air insulated switchgear of claim 3, wherein the outer surface of the shield case is a smooth curved surface, and the smooth curved surface of the shield case means that the surface has no protruding sharp points or convex edges.
6. The air insulated switchgear of claim 3, wherein the bottom of the static contact is provided with a static conductive member, the three-phase isolator has three isolating blade sets corresponding to the static conductive members of the three isolators, each isolating blade set comprises two isolating blades, and an isolating knife edge capable of being engaged with the static conductive member is formed between the two isolating blades.
7. The air insulated switchgear of claim 6, wherein the insulation switch further comprises two insulation shields disposed on both sides of the static conductive member, respectively, to shield the static conductive member.
8. The air insulated switchgear of claim 6 wherein the inside wall of the isolating moving blade is provided with conductive contacts.
9. The air insulated switchgear of claim 1, wherein the cabinet body comprises a mechanism chamber, a cable chamber, and a pressure relief chamber, the mechanism chamber is located above the cable chamber, the pressure relief chamber is located behind the cable chamber, the air box is installed above the pressure relief chamber, a pressure relief hole is formed at the bottom of the air box, and the instrument room is installed above the mechanism chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021419257.8U CN212811091U (en) | 2020-07-18 | 2020-07-18 | Air insulation type switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021419257.8U CN212811091U (en) | 2020-07-18 | 2020-07-18 | Air insulation type switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212811091U true CN212811091U (en) | 2021-03-26 |
Family
ID=75103201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021419257.8U Active CN212811091U (en) | 2020-07-18 | 2020-07-18 | Air insulation type switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212811091U (en) |
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2020
- 2020-07-18 CN CN202021419257.8U patent/CN212811091U/en active Active
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