CN103050905B - Switch cubicle ac voltage withstanding insulation annex - Google Patents

Switch cubicle ac voltage withstanding insulation annex Download PDF

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Publication number
CN103050905B
CN103050905B CN201210569022.0A CN201210569022A CN103050905B CN 103050905 B CN103050905 B CN 103050905B CN 201210569022 A CN201210569022 A CN 201210569022A CN 103050905 B CN103050905 B CN 103050905B
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China
Prior art keywords
insulation
cabinet
coupling
conical pipe
voltage withstanding
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CN201210569022.0A
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Chinese (zh)
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CN103050905A (en
Inventor
易满成
苏海博
叶建斌
顾乐
黄慧红
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Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangzhou Power Supply Bureau Co Ltd
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Abstract

Switch cubicle ac voltage withstanding insulation annex, be arranged on gas insulation switch cabinet one, gas insulation switch cabinet one there is coupling box, bus casing, gas insulation switch cabinet one is provided with cabinet groove, coupling box is arranged on cabinet trench bottom, switch cubicle ac voltage withstanding insulation annex comprises straight coupling, conical pipe, straight coupling hollow is also enclosed within coupling box, conical pipe hollow is also enclosed within described bus casing, straight coupling and conical pipe are insulating material, straight coupling length is greater than the degree of depth of gas insulation switch cabinet one cabinet groove, conical pipe length is greater than the degree of depth of bus casing.Coupling box, bus casing place put insulating material, prevent from occurring insulation breakdown or flashover between phase and phase, the length of straight coupling, conical pipe is greater than the degree of depth of cabinet groove, bus casing respectively, add the distance between phase and ground, prevent from occurring insulation breakdown or flashover between phase and ground, this structure is simple, easy accessibility, insulation effect are good.

Description

Switch cubicle ac voltage withstanding insulation annex
Technical field
The present invention relates to a kind of insulation annex, particularly a kind of switch cubicle ac voltage withstanding insulation annex be arranged on gas insulation switch cabinet.
Background technology
Gas insulation switch cabinet adopts hypobaric SF6 gas, N2 gas or mist as the dielectric of switchgear; be arc-extinguishing medium with vacuum or SF6; being concentrated by the medium pressure elements such as bus, circuit breaker, isolating switch is enclosed in casing, the modern insulation technology of integrated use, cut-off technology, the new high-tech product integrating Based Intelligent Control, protection, supervision, measurement, communication that manufacturing technology, sensing technology, digital technology are produced.Gas insulation switch cabinet is usually used in hydroelectric station, transformer station, hydroelectric station, transformer station's multidigit is in mountain region, be difficult to find large stretch of leveling land, therefore user is miniaturized to insulated switching installation, non-maintaining requirement is more and more higher, gas insulation switch cabinet is simple with its structure, take up an area few, affected by environment little, the advantage that maintenance is few obtains the favor of more and more user, gas insulation switch cabinet before being taken into use, need to carry out industrial frequency AC withstand voltage test to it, judge that various superpotential ability is born in gas insulation switch cabinet insulation by withstand voltage test, this test has important meaning to the safe operation of guarantee gas insulation switch cabinet.
Gas insulation switch cabinet needs to carry out industrial frequency AC withstand voltage test before use, the object of carrying out industrial frequency AC withstand voltage test is whether the overall insulation property of assembling of inspection are intact, prevents the situation appearance causing damage in transport, storage, Installation and Debugging process, there is foreign matter.Due between coupling box phase and phase, between coupling box phase and ground, spacing between bus casing phase and ground is less, gas insulation switch cabinet is when carrying out industrial frequency AC withstand voltage test, easy generation insulation breakdown phenomenon or insulation edge flashing phenomenon, gas insulation switch cabinet is caused to sustain damage, gas insulation switch cabinet there are coupling box and bus casing, coupling box and bus casing all need to carry out dielectric voltage withstand test separately, when carrying out voltage-withstand test to cable link and bus casing, each coupling box and bus casing insulating material is needed to set up with reinforced insulation intensity, prevent insulation breakdown or flashover, general coupling box place installing insulating heat-shrink tube or tobacco pipe head are to strengthen its dielectric strength, isolating shrinkable tube all can be subject to damage in various degree when each use, durability is poor, need often to change, very large inconvenience is caused to the use of user, tobacco pipe head is bending, inconvenient during installation, and, the terminal port distance cabinet shell of tobacco pipe head is nearer, make easily to occur insulation breakdown or flashover between coupling box phase and ground, bus casing place generally adopts insulation plug to strengthen its dielectric strength, because the bus casing architectural difference of the gas insulation switch cabinet of different model is larger, plug can only adapt to the bus casing of corresponding model, inconvenience is caused to the use of user, and, insulation plug is installed compact, handling difficulty is large, reduce the efficiency of detection.
Summary of the invention
The object of the present invention is to provide a kind of insulation good, easy-to-mount switch cubicle ac voltage withstanding insulation annex.
In order to realize object of the present invention, the technical scheme taked is:
Be arranged on gas insulation switch cabinet one, described gas insulation switch cabinet one there is coupling box, bus casing, gas insulation switch cabinet one is provided with cabinet groove, described coupling box is arranged on described cabinet trench bottom, it comprises straight coupling, conical pipe, described straight coupling hollow is also enclosed within described coupling box, described conical pipe hollow is also enclosed within described bus casing, described straight coupling and conical pipe are insulating material, described straight coupling length is greater than the degree of depth of gas insulation switch cabinet one cabinet groove, described conical pipe length is greater than the degree of depth of bus casing.
Straight coupling is enclosed within coupling box; straight coupling and conical pipe are insulating material; enhance the dielectric strength at coupling box and bus casing place; prevent from occurring insulation breakdown or flashover between phase and phase; play a very good protection; the length of straight coupling is greater than the degree of depth of cabinet groove; conical pipe length is greater than the degree of depth of bus casing; add the distance between phase and ground; prevent from occurring insulation breakdown or flashover between phase and ground, this structure is simple, easy accessibility, insulation effect are good.
Below technical scheme is further illustrated:
Wherein in an embodiment, described straight coupling length is 5/4 ~ 3/2 of gas insulation switch cabinet cabinet depth.When straight coupling length is 5/4 ~ 3/2 of gas insulation switch cabinet cabinet depth, the dielectric strength of coupling box position is better, can effectively prevent coupling box place from occurring insulation breakdown or flashover, during this length, saves material.
Wherein in an embodiment, described straight coupling length is 4/3 of gas insulation switch cabinet cabinet depth.This length compares saving material while meeting insulating requirements.
Wherein in an embodiment, described straight coupling two ends are tapered.Pyramidal structure can more firmly be enclosed within coupling box, is that test process is safer, reliable.
Wherein in an embodiment, described conical pipe external diameter is less than the internal diameter of bus casing.When conical pipe external diameter is less than the internal diameter of bus casing, dismounting is more light, improves the efficiency of test.
Wherein in an embodiment, comprise Insulating A High-Voltage lead-in wire, described coupling box has screwed hole, and described Insulating A High-Voltage wire ends is provided with screw, and described screw is connected with described screwed hole.General gas insulation switch cabinet directly by plain conductor as high-voltage connection, directly coupling box is connected on testing transformer by plain conductor, thisly be connected with certain danger, and adopt Insulating A High-Voltage lead-in wire that test can be made safer, when being generally directly wrapped in coupling box by plain conductor, the contact of plain conductor and coupling box is unreliable, easily loosen guiding discharge, and then coupling box of burning, and the screw on being gone between by Insulating A High-Voltage is connected with coupling box, more reliable, safer.
Wherein in an embodiment, also comprise insulation sealing cap, described insulation sealing cap is arranged on described coupling box, and described insulation sealing cap is insulating material.When gas insulation switch cabinet is two cabinet groove, when coupling box in one of them cabinet groove is tested, coupling box in another cabinet groove insulator seal cap sleeve is lived, strengthen the dielectric strength at coupling box place in another cabinet groove, prevent insulation breakdown or flashover, this structure is simple, easy accessibility, cost are lower.
Wherein in an embodiment, described insulating material is silicon rubber.Silicon rubber insulation better performances, can play better withstand voltage effect.
Advantage of the present invention is:
Straight coupling is enclosed within coupling box; straight coupling and conical pipe are insulating material; enhance the dielectric strength at coupling box and bus casing place; prevent from occurring insulation breakdown or flashover between phase and phase; play a very good protection; the length of straight coupling is greater than the degree of depth of cabinet groove; conical pipe length is greater than the degree of depth of bus casing; add the distance between phase and ground; prevent from occurring insulation breakdown or flashover between phase and ground, this structure is simple, easy accessibility, insulation effect are good.
Accompanying drawing explanation
Schematic diagram when Fig. 1 is gas insulation switch cabinet work;
Fig. 2 is the front view of gas insulation switch cabinet;
Fig. 3 is the schematic diagram of straight coupling in switch cubicle ac voltage withstanding insulation annex;
Fig. 4 is the cutaway view of straight coupling in switch cubicle ac voltage withstanding insulation annex;
Fig. 5 is the schematic diagram of conical pipe in switch cubicle ac voltage withstanding insulation annex;
Fig. 6 is the cutaway view of conical pipe in switch cubicle ac voltage withstanding insulation annex;
Fig. 7 is the schematic diagram of sealing cap of insulating in switch cubicle ac voltage withstanding insulation annex;
Fig. 8 is the cutaway view of sealing cap of insulating in switch cubicle ac voltage withstanding insulation annex;
Fig. 9 is the front view of another kind of gas insulation switch cabinet.
Description of reference numerals:
1. gas insulation switch cabinet one, 1a. gas insulation switch cabinet two, 11. coupling box, 111. screwed holes, 12. bus casings, 121. buses, 13. earthing blocks, 14. cabinet groove, 2. straight couplings, 3. conical pipe, 4. Insulating A High-Voltage lead-in wire, 41. screws, 5. insulate sealing cap, 6. transformer high-voltage electricity output device, 61. high-voltage output lines.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail:
Consult shown in Fig. 1-8, in an embodiment of the present invention, switch cubicle ac voltage withstanding insulation annex, be arranged on gas insulation switch cabinet 1, described gas insulation switch cabinet 1 there is coupling box 11, bus casing 12, gas insulation switch cabinet 1 is provided with cabinet groove 14, described coupling box 11 is arranged on bottom described cabinet groove 14, switch cubicle ac voltage withstanding insulation annex comprises straight coupling 2, conical pipe 3, Insulating A High-Voltage lead-in wire 4, described straight coupling 2 hollow is also enclosed within described coupling box 11, described conical pipe 3 hollow is also enclosed within described bus casing 12, described straight coupling 2 and conical pipe 3 are insulating material, described insulating material is silicon rubber, described straight coupling 2 length is greater than the degree of depth of gas insulation switch cabinet 1 cabinet groove 14, described conical pipe 3 length is greater than the degree of depth of bus casing 12.Gas insulation switch cabinet 1 housing is grounded by earthing block 13.
Described straight coupling 2 length is 4/3 (5/4 ~ 3/2) of gas insulation switch cabinet 1 cabinet groove depth.Described straight coupling 2 two ends are tapered.Described conical pipe 3 external diameter is less than the internal diameter of bus casing 12.
Described coupling box 11 has screwed hole 111, and described Insulating A High-Voltage 4 ends that go between are provided with screw 41, and described screw 41 is connected with described screwed hole 111.
In gas insulation switch cabinet, coupling box 11 and bus casing 12 all will carry out voltage-withstand test respectively, before testing, screw 41 on Insulating A High-Voltage lead-in wire 4 is connected on the screwed hole 111 of coupling box 11, again straight coupling 2 is enclosed within coupling box 11 to be tested, coupling box 11 is blocked by the tapered end of straight coupling 2, conical pipe 3 is enclosed within bus 121, conical pipe 3 external diameter is less than the internal diameter of bus casing 12, conical pipe can be inserted on bus 121 more easily, Insulating A High-Voltage lead-in wire 4 is through the hollow space of straight coupling 2, the high-voltage output line 61 that Insulating A High-Voltage goes between on 4 other ends and transformer high-voltage electricity output device 6 is connected.Straight coupling 2 enhances the dielectric strength at coupling box 11 place, and conical pipe 3 enhances the dielectric strength at bus casing 12 place.
As shown in Figure 9, the place that gas insulation switch cabinet two 1a is different from gas insulation switch cabinet 1 is, gas insulation switch cabinet two 1a is provided with cabinet groove 14 arranged side by side.Gas insulation switch cabinet two 1a also comprises insulation sealing cap 5, and described insulation sealing cap 5 is arranged on described coupling box 11, and described insulation sealing cap is insulating material, and described insulating material is silicon rubber.When coupling box 11 in one of them cabinet groove 14 of gas insulation switch cabinet two 1a is tested, in another cabinet groove, the coupling box 11 of 14 entangles with insulation sealing cap 5, strengthen the dielectric strength at coupling box 11 place in another cabinet groove 14, prevent insulation breakdown or flashover.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.

Claims (8)

1. a switch cubicle ac voltage withstanding insulation annex, be arranged on gas insulation switch cabinet one, described gas insulation switch cabinet one there is coupling box, bus casing, gas insulation switch cabinet one is provided with cabinet groove, described coupling box is arranged on described cabinet trench bottom, it is characterized in that: switch cubicle ac voltage withstanding insulation annex comprises straight coupling, conical pipe, described straight coupling hollow is also enclosed within described coupling box, described conical pipe hollow is also enclosed within described bus casing, described straight coupling and conical pipe are insulating material, described straight coupling length is greater than the degree of depth of gas insulation switch cabinet one cabinet groove, described conical pipe length is greater than the degree of depth of bus casing.
2. switch cubicle ac voltage withstanding insulation annex according to claim 1, is characterized in that: described straight coupling length is 5/4 ~ 3/2 of gas insulation switch cabinet one cabinet groove depth.
3. switch cubicle ac voltage withstanding insulation annex according to claim 2, is characterized in that: described straight coupling length is 4/3 of gas insulation switch cabinet one cabinet groove depth.
4. switch cubicle ac voltage withstanding insulation annex according to claim 1, is characterized in that: described straight coupling two ends are tapered.
5. switch cubicle ac voltage withstanding insulation annex according to claim 1, is characterized in that: described conical pipe external diameter is less than the internal diameter of bus casing.
6. switch cubicle ac voltage withstanding insulation annex according to claim 1, is characterized in that: also comprise Insulating A High-Voltage lead-in wire, described coupling box has screwed hole, and described Insulating A High-Voltage wire ends is provided with screw, and described screw is connected with described screwed hole.
7. switch cubicle ac voltage withstanding insulation annex according to claim 1, it is characterized in that: also comprise insulation sealing cap, described insulation sealing cap is arranged on described coupling box, and described insulation sealing cap is insulating material.
8. the switch cubicle ac voltage withstanding insulation annex according to claim 1 or 6 or 7, is characterized in that: described insulating material is silicon rubber.
CN201210569022.0A 2012-12-25 2012-12-25 Switch cubicle ac voltage withstanding insulation annex Active CN103050905B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210569022.0A CN103050905B (en) 2012-12-25 2012-12-25 Switch cubicle ac voltage withstanding insulation annex

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Application Number Priority Date Filing Date Title
CN201210569022.0A CN103050905B (en) 2012-12-25 2012-12-25 Switch cubicle ac voltage withstanding insulation annex

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CN103050905B true CN103050905B (en) 2015-12-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110007179B (en) * 2018-10-25 2021-04-30 童志勇 Cable intermediate joint electrical performance testing tool and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050219804A1 (en) * 2002-10-31 2005-10-06 Mitsubishi Denki Kabushiki Kaisha Gas-insulated switchgear
CN201307728Y (en) * 2008-11-10 2009-09-09 宁波华通电器集团股份有限公司 Gas insulated load switchgear
CN101738571A (en) * 2008-11-06 2010-06-16 上海市电力公司 Alternating current withstand voltage test method for 10kV switch cabinet
CN101923140A (en) * 2010-09-07 2010-12-22 北京必成达电缆附件有限公司 Withstand test device of sleeve of looped network cabinet equipment
CN201945604U (en) * 2010-11-28 2011-08-24 李琛 Insulating hood for cable alternating current and withstand voltage test

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050219804A1 (en) * 2002-10-31 2005-10-06 Mitsubishi Denki Kabushiki Kaisha Gas-insulated switchgear
CN101738571A (en) * 2008-11-06 2010-06-16 上海市电力公司 Alternating current withstand voltage test method for 10kV switch cabinet
CN201307728Y (en) * 2008-11-10 2009-09-09 宁波华通电器集团股份有限公司 Gas insulated load switchgear
CN101923140A (en) * 2010-09-07 2010-12-22 北京必成达电缆附件有限公司 Withstand test device of sleeve of looped network cabinet equipment
CN201945604U (en) * 2010-11-28 2011-08-24 李琛 Insulating hood for cable alternating current and withstand voltage test

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
电缆测试罩研制和应用;吴振中 胡达;《上海电力》;20041231(第5期);463-465 *

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Effective date of registration: 20200923

Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No.

Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.

Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No.

Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd.

TR01 Transfer of patent right