CN109687336B - Inflatable high-voltage switch gas tank - Google Patents
Inflatable high-voltage switch gas tank Download PDFInfo
- Publication number
- CN109687336B CN109687336B CN201910169905.4A CN201910169905A CN109687336B CN 109687336 B CN109687336 B CN 109687336B CN 201910169905 A CN201910169905 A CN 201910169905A CN 109687336 B CN109687336 B CN 109687336B
- Authority
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- China
- Prior art keywords
- air chamber
- switch
- movable
- bus
- circuit breaker
- 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.)
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Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 28
- 239000010949 copper Substances 0.000 claims abstract description 28
- 230000003068 static effect Effects 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 238000002679 ablation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 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
- H02B13/035—Gas-insulated switchgear
Abstract
The invention relates to the field of high-voltage electrical equipment, in particular to an inflatable high-voltage switch air box, which comprises a switch air chamber and a bus air chamber; the upper part in the switch air chamber is provided with a disconnecting switch, the disconnecting switch is connected with the wire inlet end of the circuit breaker in the middle part of the switch air chamber through a movable blade holder copper bar, and the wire outlet end of the tail part of the circuit breaker is connected with the wire outlet sleeve at the lower part of the switch air chamber through a wire outlet copper wire; the isolating switch moving knife driving rotating shaft is connected with a pull rod of an isolating switch operating mechanism outside the switch air chamber; the movable end pull rod of the circuit breaker is connected with a circuit breaker operating mechanism outside the switch air chamber. The switch air chamber and the bus air chamber are integrally welded by laser, mutually sealed into independent air chambers, and respectively provided with a pressure relief opening. The invention reduces the volume of the switch; the double-air-chamber structure improves the integral strength of the air box, separates the bus from the switch air chamber, and improves the safety of the switch equipment.
Description
Technical Field
The invention relates to the field of high-voltage electrical equipment, in particular to an inflatable high-voltage switch air box.
Background
With the sustainable development of Chinese economy, the power industry has been greatly developed. High-voltage switchgear plays an increasingly positive role as a load distribution and protection means for power systems. Two major types of insulation technologies are mainly adopted for high-voltage switch equipment in China, one is a solid insulation technology, and the other is a gas insulation technology. In the prior art, the switching equipment in the 40.5kV voltage class of the transmission and distribution network is mainly based on a gas insulation technology. The main technical scheme is that components such as a circuit breaker, a disconnecting switch, a bus and the like are arranged in an air box, and insulation between the switch and the phase is realized by filling insulating gas (such as sulfur hexafluoride gas) into the air box. Because the 40.5kV inflatable high-voltage switch cabinet has larger volume and larger electrodynamic force at the moment of action of the short-circuiting device, the gas tank is easy to deform, the connection reliability of the bus is affected, and the field installation requirement is higher.
Disclosure of Invention
The invention aims to provide an inflatable high-voltage switch gas tank which is small in size, reliable in connection and high in safety.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the inflatable high-voltage switch gas box comprises a switch gas chamber and a bus gas chamber, wherein the bus gas chamber is provided with a bus gas chamber pressure relief opening, a bus connecting seat, a bus and a wall bushing, and the top of the switch gas chamber is provided with the pressure relief opening; the upper part in the switch air chamber is provided with a disconnecting switch, the disconnecting switch is connected with the wire inlet end of the circuit breaker in the middle part of the switch air chamber through a movable blade holder copper bar, and the wire outlet end of the tail part of the circuit breaker is connected with the wire outlet sleeve at the lower part of the switch air chamber through a wire outlet copper wire; the isolating switch moving knife driving rotating shaft is connected with a pull rod of an isolating switch operating mechanism outside the switch air chamber; the movable end pull rod of the circuit breaker is connected with a circuit breaker operating mechanism outside the switch air chamber. An inflatable high-voltage switch gas tank is welded by a stainless steel plate through a laser welding process. The switch air chamber and the bus air chamber are integrally welded by laser, mutually sealed into independent air chambers, and respectively provided with a pressure relief opening.
An isolating switch in an inflatable high-voltage switch air box is positioned at the upper part of a switch air chamber, a wall bushing on a channel steel fixed at the top of the switch air chamber is provided with a static knife holder in the switch air chamber, and the static knife is connected with a bus in a bus chamber air chamber through the wall bushing; the middle of the movable knife is provided with a movable knife crank arm, the movable knife crank arm is provided with a hole and is connected with a movable knife supporting seat through a pin, the movable knife rotates by taking the pin as an axis, and the movable knife is in sliding connection with the movable knife supporting seat through a contact; the crank arm is connected with the movable knife driving rotating shaft through the movable knife pull rod. The isolating switch operating mechanism drives the rotating shaft to rotate through driving the movable knife, the movable knife crank arm is driven to move through the movable knife pull rod, and then the movable knife is driven to rotate through the movable knife crank arm, so that the movable knife is connected with the static knife holder or connected with the grounding knife holder or in an intermediate isolation state. The movable knife holder copper bar is fixed on the front plate of the switch air chamber through an insulating supporting piece.
The contact of the movable knife bears the current when the switch operates, and the reliability of contact connection is critical to the normal operation of the switch. Conventional operation selects a movable blade single-contact connection, and under the condition of large flow, the single-contact connection cannot meet the operation requirement, and ablation between a contact and a blade seat is seriously caused. In order to solve the reliability of contact in high current, the movable cutter adopts 2 groups of blades which are fixed on the movable cutter crank arm side by side, and each group of 2 blades are symmetrically distributed along the movable cutter crank arm and move along with the movable cutter crank arm. The inner sides of the two ends of the movable blade are respectively provided with a contact, one contact is in sliding connection with the movable blade supporting seat, and the other contact is in sliding connection with the static blade holder or the grounding blade holder, so that the conduction or grounding function is realized. When the movable knife is positioned between the static knife holder and the grounding knife holder, the isolating switch is in an isolating state. The movable knife group is internally provided with a pressure spring, a screw rod and a stud. The movable cutter is provided with 2 through holes, counter bores are formed in the outer sides of the through holes, the pressure springs are arranged in the counter bores, the screw presses the pressure springs into the counter bores, and the pressure springs penetrate through the through holes and then penetrate through fixing holes in the crank arms of the movable cutter to penetrate through the through holes of the movable cutter on the opposite sides; the opposite side screw bolt presses the pressure spring into the counter bore of the movable cutter, and then is screwed into the screw thread hole. The depth of the stud screwed into the screw is adjusted, so that the travel of the pressure spring is changed, and the pressure of the movable knife contact is adjusted. The contact pressure is too large, so that the output force of the operating mechanism is increased; the contact pressure is too small and the loop resistance of the switch becomes large. The number of groups of moving blades is increased, the current carrying capacity of the switch is improved, meanwhile, the heat dissipation capacity of the isolating switch is improved, and ablation caused by overhigh contact temperature is avoided.
The circuit breaker is composed of a circuit breaker pole and a circuit breaker operating mechanism. The circuit breaker post includes vacuum interrupter, moving end copper terminal, quiet end copper terminal, moving end pull rod, spring touch finger, solid insulating layer, and vacuum interrupter quiet end is connected with quiet end copper terminal, and vacuum interrupter moves the end and is connected with moving end copper terminal through spring touch finger, and moving end copper terminal is connected with isolator's moving blade copper bar. The tie rod end of the breaker is fixed on the front plate of the switch air chamber air box through bolts. The pull rod is connected with the corrugated sleeve pull rod of the breaker operating mechanism. The outlet sleeve is positioned below the bus air chamber and behind the lower part of the switch air chamber. The copper terminal of the outlet sleeve in the switch air chamber is connected with the static end copper terminal of the pole of the circuit breaker through the outlet copper wire. The circuit breaker adopts a vacuum arc extinguishing technology and a solid sealing technology, so that the size of the circuit breaker is obviously reduced, and the insulating capability of the circuit breaker is improved. The layout of the outlet sleeve fully utilizes the space at the lower part of the bus air chamber, reduces the height of the switch air box, improves the working height of the assembly of the cable and the outlet sleeve, and is convenient for construction.
The beneficial effects of the invention are as follows: 1. the circuit breaker adopts a vacuum arc extinguishing chamber and a solid insulating material, so that the volume of the switch is reduced; 2. the breaker pole adopts the pressure equalizing piece and the semi-conductive shielding grounding layer, so that the partial discharge capacity of the product is reduced, and the service life of the product is prolonged; 3. the double-air-chamber structure improves the integral strength of the air box, separates the bus from the switch air chamber, and improves the safety of the switch equipment; 4. the strength of the bus chamber air chamber is improved, and the difficulty of bus connection is reduced.
Drawings
Figure 1 is a schematic diagram of a right-hand view of an inflatable high-voltage switch gas tank
Figure 2 is a schematic diagram of a disconnector knife assembly
Figure 3 is a cross-sectional view of the disconnector moving blade assembly
1. Reference numerals illustrate: the device comprises a switch air chamber, 2, a bus air chamber, 3, a disconnecting switch operating mechanism, 4, a disconnecting switch, 4.1, a grounding tool apron, 4.2, a movable tool, 4.21, a pressure spring, 4.22, a screw, 4.3, a static tool apron, 4.4, a movable tool pull rod, 4.5, a movable tool driving rotating shaft, 4.6, a movable tool supporting seat, 4.7, a movable tool crank arm, 4.8, an insulating supporting piece, 5, a circuit breaker operating mechanism, 6, a circuit breaker, 7, an outgoing copper wire, 8, an outgoing sleeve, 9, a bus air chamber pressure relief opening, 10, a switch air chamber pressure relief opening, 11, a bus connecting seat, 12 and a wall bushing.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
Example 1
FIG. 1 is a right side view of the present invention with the left side closure plate of the switch air chamber removed for ease of illustration. As shown in figure 1, the inflatable high-voltage switch gas tank has a rated voltage of 40.5kV, a rated current of 1250A and a gas tank width of 600mm. The bus-bar air chamber 1 is flush with the top of the bus-bar air chamber 2, the bus-bar air chamber 2 is arranged behind the switch air chamber 1, the bottom of the bus-bar air chamber 2 is higher than the bottom of the switch air chamber 1, and an outgoing line sleeve 8 of the switch air chamber 1 is arranged below the bus-bar air chamber 1. The bus air chamber 2 is provided with a bus air chamber pressure relief opening 9, a bus connecting seat 11, a bus and a wall bushing 12. The top of the switch air chamber 1 is provided with a switch air chamber pressure relief opening 10; the upper part in the switch air chamber 1 is provided with a disconnecting switch 4, the disconnecting switch 4 is connected with the wire inlet end of a circuit breaker 6 in the middle part of the switch air chamber 1 through a movable cutter seat copper bar, and the wire outlet end at the tail part of the circuit breaker 6 is connected with a wire outlet sleeve 8 at the lower part of the switch air chamber through a wire outlet copper wire 7; the movable knife driving rotating shaft 4.5 of the isolating switch 4 is connected with a pull rod of the isolating switch operating mechanism 3 outside the switch air chamber 1; the movable end pull rod of the breaker 6 is connected with a breaker operating mechanism 5 outside the switch air chamber 1. The inflatable high-voltage switch gas tank is welded by adopting a stainless steel plate through a laser welding process. The switch air chamber 1 and the bus air chamber 2 are integrated through laser welding, are mutually sealed into independent air chambers, and are respectively provided with pressure relief openings, so that the mutual influence of bus and switch faults is avoided, the integral strength of the air box is improved, and the deformation of the air box is reduced.
An isolating switch 4 in an inflatable high-voltage switch air box is positioned at the upper part of a switch air chamber 1, a grounding cutter holder 4.1 is fixed on a top channel steel in the switch air chamber 1, a wall bushing 12 is provided with a static cutter holder 4.3 in the switch air chamber 1, and the static cutter is connected with a bus in a bus air chamber 2 through the wall bushing 12; a movable cutter crank arm is arranged in the middle of the movable cutter 4.2, a hole of the movable cutter crank arm is connected with the movable cutter supporting seat 4.6 through a pin, the movable cutter 4.2 rotates by taking the pin as an axis, and the movable cutter 4.6 is in sliding connection with the movable cutter supporting seat 4.6 through a contact; the movable knife crank arm 4.7 is connected with a movable knife driving rotating shaft through a movable knife pull rod 4.4. The isolating switch operating mechanism 3 drives the rotating shaft 4.5 to rotate through driving the movable knife, the movable knife crank arm 4.7 is driven to move through the movable knife pull rod 4.4, and the movable knife 4.2 is driven to rotate through the movable knife crank arm 4.7, so that the movable knife 4.2 is connected with the static knife holder 4.3 or connected with the grounding knife holder 4.1 or in an intermediate isolation state. The movable knife holder copper bar is fixed on the front plate of the switch air chamber 1 through an insulating supporting piece 4.8.
The contact of the moving blade 4.2 bears the current during the operation of the switch, and the reliability of contact connection is critical to the normal operation of the switch. Conventional small-current operation, namely selecting single-contact connection of a movable knife; in the case of large flows, single-contact connections have not been able to meet the operating requirements, which seriously leads to ablation between the contact and the holder. In order to solve the reliability of contact in high current, as shown in fig. 2 and 3, the movable knife adopts 2 groups of movable blades which are fixed on the movable knife crank arms side by side, and each group of 2 blades are symmetrically distributed along the movable knife crank arms 4.7 and move along with the movable knife crank arms. The inner sides of the two ends of the movable blade are respectively provided with a contact, one contact is in sliding connection with the movable blade supporting seat 4.6, and the other contact is in sliding connection with the static blade seat 4.3 or the grounding blade seat 4.1, so that the conduction or grounding function is realized. When the movable knife 4.2 is positioned between the static knife holder and the grounding knife holder, the isolating switch 4 is in an isolating state. The movable knife group is internally provided with a pressure spring 4.21, a screw 4.22 and a stud. The movable blade is provided with 2 through holes, counter bores are formed in the outer sides of the through holes, the pressure springs 4.21 are arranged in the counter bores, the screw presses the pressure springs into the counter bores, the pressure springs penetrate through the through holes and then penetrate through fixing holes in the movable blade crank arms 4.7, and the through holes of the opposite movable blade are penetrated; the opposite side screw bolt presses the pressure spring into the counter bore of the movable cutter, and then is screwed into the 4.22 screw hole of the screw rod. The depth of the stud screwed into the screw is adjusted, so that the travel of the pressure spring is changed, and the pressure of the movable knife contact is adjusted. The contact pressure is too large, so that the output force of the operating mechanism is increased; the contact pressure is too small and the loop resistance of the switch becomes large. The number of groups of moving blades is increased, the current carrying capacity of the switch is improved, meanwhile, the heat dissipation capacity of the isolating switch is improved, and ablation caused by overhigh contact temperature is avoided.
The breaker 6 is composed of a breaker pole and a breaker operating mechanism 5. The circuit breaker post includes vacuum interrupter, moving end copper terminal, quiet end copper terminal, moving end pull rod, spring touch finger, solid insulating layer, and vacuum interrupter quiet end is connected with quiet end copper terminal, and vacuum interrupter moves the end and is connected with moving end copper terminal through spring touch finger, and moving end copper terminal is connected with isolator's moving blade holder copper bar. The breaker is fixed on the front plate of the switch air chamber air box through bolts. The pull rod is connected with a corrugated sleeve pull rod of the breaker operating mechanism 5. The outlet sleeve is positioned below the bus air chamber and behind the lower part of the switch air chamber. The copper terminal of the outlet sleeve 8 in the switch air chamber is connected with the static end copper terminal of the pole of the circuit breaker through the outlet copper wire 7. The circuit breaker 6 adopts a vacuum arc extinguishing technology and a sealing technology, so that the size of the circuit breaker is obviously reduced, and the insulating capability of the circuit breaker is improved. The layout of the outlet sleeve 8 fully utilizes the space at the lower part of the bus air chamber, reduces the height of the switch air box, improves the working height of the assembly of the cable and the outlet sleeve, and is convenient for construction.
The circuit breaker adopts a vacuum arc extinguishing chamber and a solid insulating material, so that the volume of the switch is reduced; the double-air-chamber structure improves the integral strength of the air box, separates the bus from the switch air chamber, and improves the safety of the switch equipment.
Claims (3)
1. The utility model provides an inflatable high-voltage switch gas tank, includes switch air chamber (1) and generating line air chamber (2), its characterized in that: the switch air chamber (1) and the bus air chamber (2) are welded together, the tops of the switch air chamber (1) and the bus air chamber (2) are flush, the bus air chamber (2) is arranged behind the switch air chamber (1), the bottom of the bus air chamber (2) is higher than the bottom of the switch air chamber (1), and an outgoing line sleeve (8) of the switch air chamber (1) is arranged below the bus air chamber (2); a busbar air chamber pressure relief opening (9) is formed in the top of the busbar air chamber (2), and a switch air chamber pressure relief opening (10) is formed in the top of the switch air chamber (1); the upper part in the switch air chamber (1) is provided with a disconnecting switch (4), the disconnecting switch (4) is connected with the wire inlet end of a circuit breaker (6) in the middle part of the switch air chamber (1) through a movable blade holder copper bar, and the wire outlet end at the tail part of the circuit breaker (6) is connected with a wire outlet sleeve (8) at the lower part of the switch air chamber (1) through a wire outlet copper wire (7); the grounding tool apron (4.1) of the isolating switch (4) is fixed on the top channel steel in the switch air chamber (1), the wall bushing (12) is provided with the static tool apron (4.3) in the switch air chamber (1), and the static tool is connected with a bus in the bus air chamber (2) through the wall bushing (12); a movable cutter crank arm (4.7) is arranged in the middle of the movable cutter (4.2), the movable cutter crank arm (4.7) is provided with a hole and is connected with a movable cutter supporting seat (4.6) through a pin, the movable cutter (4.2) rotates by taking the pin as an axis, and the movable cutter is in sliding connection with the movable cutter supporting seat (4.6) through a contact; the movable knife crank arm (4.7) is connected with the movable knife driving rotating shaft through the movable knife pull rod (4.4).
2. The inflatable high-voltage switch gas box according to claim 1, wherein: the movable cutter (4.2) adopts 2 groups of movable cutters which are fixed on the movable cutter crank arm (4.7) side by side, and each group of 2 cutters are symmetrically distributed along the movable cutter crank arm (4.7); the movable blade is provided with 2 through holes, counter bores are formed in the outer sides of the through holes, and the pressure springs (4.21) are arranged in the counter bores.
3. The inflatable high-voltage switch gas box according to claim 2, wherein: the circuit breaker (6) consists of a circuit breaker pole and a circuit breaker operating mechanism (5); the circuit breaker post includes vacuum interrupter, moving end copper terminal, quiet end copper terminal, moving end pull rod, spring touch finger, solid insulating layer, and vacuum interrupter quiet end is connected with quiet end copper terminal, and vacuum interrupter moves the end and is connected with moving end copper terminal through spring touch finger, and moving end copper terminal is connected with isolator's moving blade holder copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169905.4A CN109687336B (en) | 2019-03-07 | 2019-03-07 | Inflatable high-voltage switch gas tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169905.4A CN109687336B (en) | 2019-03-07 | 2019-03-07 | Inflatable high-voltage switch gas tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109687336A CN109687336A (en) | 2019-04-26 |
| CN109687336B true CN109687336B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910169905.4A Active CN109687336B (en) | 2019-03-07 | 2019-03-07 | Inflatable high-voltage switch gas tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109687336B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578254B (en) * | 2024-01-19 | 2024-03-29 | 四川电器集团中低压智能配电有限公司 | Intelligent box-type heavy-current environment-friendly gas-insulated switchgear |
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| CN205081390U (en) * | 2015-11-05 | 2016-03-09 | 北海银河开关设备有限公司 | Environmental protection gas -insulated looped netowrk cabinet |
| CN206271607U (en) * | 2016-10-27 | 2017-06-20 | 珠海西辉电气科技有限公司 | A kind of side hanging isolation ground connection coordinated type vacuum circuit breaker |
| CN106451191A (en) * | 2016-11-14 | 2017-02-22 | 国家电网公司 | Cubicle gas-insulated switchgear |
| CN206471703U (en) * | 2017-02-10 | 2017-09-05 | 河南森源电气股份有限公司 | A kind of container-type prefabricated cabin gas-filling cabinet and container-type prefabricated cabin |
| CN209375008U (en) * | 2019-03-07 | 2019-09-10 | 广西银河迪康电气有限公司 | A kind of inflatable high-voltage switch gear gas tank |
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|---|---|
| CN109687336A (en) | 2019-04-26 |
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