CN219739760U

CN219739760U - Environment-friendly insulating cabinet

Info

Publication number: CN219739760U
Application number: CN202320440515.8U
Authority: CN
Inventors: 王广先; 赵瑞影; 郑勇瀚; 袁松强; 郭晓刚; 吴昊; 李文洋
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2023-03-08
Filing date: 2023-03-08
Publication date: 2023-09-22
Anticipated expiration: 2033-03-08

Abstract

The utility model provides an environment-friendly insulating cabinet, which comprises an air box, a disconnecting switch and a vacuum circuit breaker, wherein the disconnecting switch is connected with the vacuum circuit breaker and comprises a plurality of disconnecting switch structures, and each disconnecting switch structure comprises: the device comprises a connecting fixed contact, a moving contact, an isolation fixed contact, a transmission screw rod and a grounding fixed contact, wherein the transmission screw rod is arranged in the isolation fixed contact and the grounding fixed contact in a penetrating way and is in threaded connection with the moving contact, and the transmission screw rod is rotatably arranged to drive the moving contact to move so that the moving contact can be selectively inserted on the connecting fixed contact; the two ends of the isolation static contact are sleeved with at least one first equalizing ring; the second equalizing ring is sleeved on the fixed contact and positioned between the moving contact and the fixed contact; the outer ring surfaces of the first equalizing ring and the second equalizing ring are formed by rotating one circle around the axis of the transmission screw rod through an arc line. The utility model solves the problem of uneven electric field distribution in the environment-friendly gas insulated cabinet in the prior art.

Description

Environment-friendly insulating cabinet

Technical Field

The utility model relates to the technical field of switch equipment, in particular to an environment-friendly insulating cabinet.

Background

For reducing greenhouse gas emissions, environmentally friendly gaseous mediums are sought to replace SF for switchgear ₆ Not or only little SF ₆ Becomes a research hotspot. Currently, in the aspect of arc extinction, a vacuum arc-extinguishing chamber is generally adopted as a main switching-off unit for switching equipment with the voltage class of 40.5kV and below, and in the aspect of insulation, environment-friendly gas such as nitrogen is adopted to replace SF ₆ Research as an insulating medium has also been greatly advanced, and in particular, the national "double carbon" target is put forth to a higher requirement on environmental protection.

In particular, if the SF is replaced by the environment-friendly gas such as nitrogen ₆ Due to the insulation of nitrogen, compared with SF ₆ The insulating property of (3) needs to be worse to the nitrogen gas that aerifing the cabinet more, just can satisfy the insulating property requirement in the cabinet that aerifing, and the pressure in the cabinet that aerifing this moment is great can make to aerify the cabinet and be difficult to bear thereby lead to deformation to, because the influence of insulating cabinet inner structure, the electric field distribution inside the insulating cabinet is uneven, thereby has influenced the insulating properties inside the insulating cabinet to a certain extent, thereby makes the inside nitrogen gas that needs more of insulating cabinet.

Disclosure of Invention

The utility model mainly aims to provide an environment-friendly insulating cabinet so as to solve the problem of uneven electric field distribution in the environment-friendly gas insulating cabinet in the prior art.

In order to achieve the above object, the present utility model provides an environment-friendly insulating cabinet, comprising an air box, a disconnecting switch and a vacuum circuit breaker, wherein the air box is provided with a first air chamber and a second air chamber, the first air chamber is positioned above the second air chamber, the vacuum circuit breaker is arranged in the second air chamber, the disconnecting switch is arranged in the first air chamber, the disconnecting switch is connected with the vacuum circuit breaker, the disconnecting switch comprises a plurality of disconnecting switch structures, and each disconnecting switch structure comprises: the device comprises a connecting fixed contact, a moving contact, an isolation fixed contact, a transmission screw rod and a grounding fixed contact, wherein the transmission screw rod is arranged in the isolation fixed contact and the grounding fixed contact in a penetrating way and is in threaded connection with the moving contact, and the transmission screw rod is rotatably arranged to drive the moving contact to move so that the moving contact can be selectively inserted on the connecting fixed contact; the two ends of the isolation static contact are sleeved with at least one first equalizing ring; the second equalizing ring is sleeved on the fixed contact and positioned between the moving contact and the fixed contact; the outer ring surfaces of the first equalizing ring and the second equalizing ring are formed by rotating one circle around the axis of the transmission screw rod through an arc line.

Further, the environment-friendly insulating cabinet comprises a plurality of side parallel buses, the side parallel buses are all installed in the first air chamber, the isolating switch structures are connected with the side parallel buses in a one-to-one correspondence manner, and each side parallel bus comprises: the side parallel conductors, the first branch conductors, the first fasteners and the second fasteners, one end of each first branch conductor is connected with each side parallel conductor through each first fastener, and the other end of each first branch conductor is connected with the connecting static contact of the corresponding isolating switch structure through each second fastener; a side bushing, at least part of which is made of an insulating material, connected with one end of the side bushing so that the side bushing passes through the side bushing and the cabinet; the first shielding cover is sleeved on the first fastening piece; and the second shielding cover is sleeved on the second fastening piece.

Further, at least part of the first branch conductor is of a columnar structure; and/or, the environment-friendly insulating cabinet further comprises a third fastener and a third shielding cover, wherein the third fastener is inserted into the side parallel conductor and the first branch conductor, the third fastener is positioned at one end of the first fastener far away from the connecting static contact, the third shielding cover is provided with an avoidance hole, and after the third shielding cover is arranged on the side parallel conductor, the third fastener is avoided Kong Birang; wherein the end part of the first branch conductor is positioned at the inner side of the third shielding cover; and/or the second fastening piece is a plurality of, and the second shielding cover is arranged on the plurality of second fastening pieces.

Further, the side union sleeve includes: a conductor section connected to the side conductor; and the insulating sleeve is wrapped on the outer side of the conductor part and comprises an inner sleeve section and an outer sleeve section which are connected with each other, so that a third shielding groove is formed between the inner sleeve section and the outer sleeve section.

Further, a part of the sleeve section of the inner sleeve section is arranged at intervals with the conductor part, so that a fourth shielding groove is formed between the inner sleeve section and the conductor part; and/or the side-by-side sleeve comprises a hydrophobic layer on the outer surface of the outer sleeve section, the hydrophobic layer being formed from a cured silicone rubber coating applied to the outer surface of the outer sleeve section.

Further, the vacuum circuit breaker has a plurality of solid utmost point posts that seal, and each isolator structure all includes the connection insulator, and a plurality of solid utmost point posts are connected with the connection insulator one-to-one of a plurality of isolator structures, and the environment-friendly insulated cabinet includes: the other end of each second branch conductor is connected with a corresponding solid-sealed polar pole of the vacuum circuit breaker; and a fourth shield cover arranged on the fourth fastener.

Further, the connecting insulator comprises a connecting conductor and an insulating sleeve, one end of the connecting conductor is connected with the isolation static contact, the other end of the connecting conductor is used for being connected with the vacuum circuit breaker, and the insulating sleeve is wrapped on the outer side of the connecting conductor; along the extending direction of the connecting conductor, two ends of the insulating sleeve comprise an inner insulating ring and an outer insulating ring which are connected with each other to form a first shielding groove, wherein the connecting section between the inner insulating ring and the outer insulating ring is an arc section.

Further, the first air chamber and the second air chamber are separated by an intermediate partition plate, and each isolating switch structure comprises: the support insulator, one end of the support insulator is connected with the connecting static contact, and the other end of the support insulator is connected with the middle partition plate; along the extending direction of the supporting insulator, one end of the supporting insulator, which is connected with the connecting static contact, is provided with a second shielding groove, the supporting insulator also comprises a connecting piece which is used for being connected with the connecting static contact, and the second shielding groove is arranged around the connecting piece; wherein the connecting piece is made of a metal material.

Further, the environment-friendly insulating cabinet comprises: the positioning block is fixedly arranged on the first side plate of the air box and positioned at the inner side of the air box, and the middle partition plate is provided with a positioning groove which is matched with the positioning block so as to install the middle partition plate; the positioning reinforcing rib comprises a supporting rib section and a connecting rib section, the supporting rib section is arranged on the second side plate of the air box, one end of the connecting rib section is connected with the supporting rib section, and the other end of the connecting rib section is connected with the middle partition plate; wherein, be the setting of preset contained angle between first curb plate and the second curb plate.

Further, the environment-friendly insulating cabinet comprises: the first reinforcing ribs are arranged at intervals along the first direction; the second reinforcing ribs are arranged at intervals along the second direction; each second reinforcing rib and each first reinforcing rib are arranged on the first side plate of the air box and are positioned on the outer side of the air box; wherein, the first direction and the second direction are arranged at a preset included angle.

By applying the technical scheme of the utility model, the utility model provides an environment-friendly insulating cabinet which comprises an air box, a disconnecting switch and a vacuum circuit breaker, wherein the air box is provided with a first air chamber and a second air chamber, the first air chamber is positioned above the second air chamber, the vacuum circuit breaker is arranged in the second air chamber, the disconnecting switch is arranged in the first air chamber, the disconnecting switch is connected with the vacuum circuit breaker, the disconnecting switch comprises a plurality of disconnecting switch structures, and each disconnecting switch structure comprises: the device comprises a connecting fixed contact, a moving contact, an isolation fixed contact, a transmission screw rod and a grounding fixed contact, wherein the transmission screw rod is arranged in the isolation fixed contact and the grounding fixed contact in a penetrating way and is in threaded connection with the moving contact, and the transmission screw rod is rotatably arranged to drive the moving contact to move so that the moving contact can be selectively inserted on the connecting fixed contact; the two ends of the isolation static contact are sleeved with at least one first equalizing ring; the second equalizing ring is sleeved on the fixed contact and positioned between the moving contact and the fixed contact; the outer ring surfaces of the first equalizing ring and the second equalizing ring are formed by rotating an arc line around the axis of the transmission screw rod for one circle, so that through the arrangement of the first equalizing ring, the two ends of the isolation static contact can be wrapped, the edge of the two ends of the isolation switch is prevented from discharging, the effect of a uniform electric field is achieved, the end part of the connection static contact can be wrapped through the arrangement of the second equalizing ring, the edge of the end part of the connection static contact is prevented from discharging, and the effect of the uniform electric field is further achieved, so that the insulation performance of the isolation switch structure is improved when the isolation switch structure is arranged in a gas chamber of the gas chamber.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic internal structure of an embodiment of an environmentally friendly insulated cabinet according to the utility model;

FIG. 2 shows an enlarged schematic view of area A of the environmentally friendly insulated cabinet according to FIG. 1;

FIG. 3 shows a schematic plan view of the environment-friendly insulating cabinet according to FIG. 1;

fig. 4 shows a schematic structural view of a second or fourth shield of the environmentally friendly insulating cabinet according to the present utility model;

fig. 5 shows a schematic structural view of a third shield of the environmentally friendly insulating cabinet according to the present utility model;

fig. 6 shows a schematic structural view of a first shielding case of the environmentally friendly insulating cabinet according to the present utility model;

fig. 7 shows a schematic structural view of a first or second grading ring of the environmentally friendly insulating cabinet according to the present utility model;

fig. 8 shows a schematic structural view of a connection insulator of the disconnecting switch structure according to the present utility model;

FIG. 9 shows a cross-sectional view of a connection insulator of the disconnector structure according to FIG. 8;

fig. 10 shows a schematic structural view of an in-out terminal of the environmentally friendly insulated cabinet according to the present utility model;

fig. 11 shows a cross-sectional view of the in-out wire terminal according to fig. 10;

fig. 12 shows a schematic structural view of an encapsulated pole of the isolating switch structure according to the present utility model;

fig. 13 shows a schematic structural view of an insulating tie rod inside the encapsulated pole according to fig. 12;

fig. 14 shows a first structural schematic diagram of a support insulator of the disconnector structure according to the utility model;

fig. 15 shows a second schematic structural view of a support insulator of the disconnector structure according to the utility model;

fig. 16 shows a cross-sectional view of the support insulator according to fig. 15;

FIG. 17 shows a schematic diagram of the side-by-side sleeve of the environmentally friendly insulated cabinet according to the utility model;

FIG. 18 shows a cross-sectional view of the side union sleeve according to FIG. 17;

FIG. 19 shows a schematic structural view of section B-B of the embodiment of the environmentally friendly insulated cabinet according to FIG. 3;

fig. 20 shows a schematic view of the internal structure of the environment-friendly insulating cabinet according to fig. 19;

FIG. 21 shows a schematic structural view of a first side panel of an environmentally friendly insulated cabinet according to the present utility model;

FIG. 22 shows a schematic structural view of a C-C section of the environmentally friendly insulated cabinet according to FIG. 21;

FIG. 23 shows an enlarged schematic view of region D of the environmentally friendly insulated cabinet according to FIG. 21;

FIG. 24 shows an enlarged schematic view of region E of the environmentally friendly insulated cabinet according to FIG. 22;

fig. 25 is a schematic view showing a structure in which first and second reinforcing ribs of an environment-friendly insulating cabinet according to the present utility model are mounted on a first side plate;

FIG. 26 shows a schematic structural view of a section F-F of the environmentally friendly insulating cabinet according to FIG. 25;

fig. 27 shows a schematic structural view of an embodiment of a disconnector structure according to the utility model;

fig. 28 shows a schematic structural view of the connection of the operating mechanism of the vacuum circuit breaker and the insulating pull rod of the environment-friendly insulating cabinet according to the present utility model.

Wherein the above figures include the following reference numerals:

1. an air box; 100. a gas chamber; 101. a first air chamber; 102. a second air chamber; 11. a middle partition plate; 110. a positioning groove; 12. a first side plate; 13. a second side plate;

2. an isolating switch; 200. an isolating switch structure; 20. switching on the static contact; 21. a moving contact; 22. isolating the static contact; 23. a transmission screw rod; 26. a grounding static contact; 201. a first equalizing ring; 202. a second equalizing ring; 24. connecting an insulator; 240. a connection conductor; 241. an insulating sleeve; 2410. an inner insulating ring; 2411. an outer insulating ring; 2412. a first shielding groove; 25. a support insulator; 251. a second shielding groove; 252. a connecting piece; 3. a vacuum circuit breaker; 300. sealing the polar post; 301. an insulating pull rod; 302. an operating mechanism;

4. a side parallel bus; 40. side parallel conductors; 41. a first branch conductor; 42. a first fastener; 43. a second fastener; 44. side-by-side sleeving; 45. a first shield; 46. a second shield; 47. a third fastener; 48. a third shield; 480. avoidance holes; 440. a conductor section; 441. an insulating sleeve; 444. a third shielding groove; 442. an inner sleeve section; 443. a jacket pipe section; 445. a fourth shielding groove; 50. a second branch conductor; 51. a fourth fastener; 53. a fourth shield; 55. a third branch conductor; 56. a wire inlet and outlet terminal; 61. a first reinforcing rib; 62. a second reinforcing rib; 601. an inner stiffener section; 602. an outer stiffener section; 71. a positioning block; 72. positioning reinforcing ribs; 721. a support rib section; 722. a connecting rib section; 8. and (5) overhauling the sealing plate.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 28, the present utility model provides an environment-friendly insulating cabinet, comprising an air box 1, a disconnecting switch 2 and a vacuum circuit breaker 3, wherein the air box 1 is provided with a first air chamber 101 and a second air chamber 102, the first air chamber 101 is positioned above the second air chamber 102, the vacuum circuit breaker 3 is installed in the second air chamber 102, the disconnecting switch 2 is installed in the first air chamber 101, the disconnecting switch 2 is connected with the vacuum circuit breaker 3, the disconnecting switch 2 comprises a plurality of disconnecting switch structures 200, and each disconnecting switch structure comprises: the device comprises a connecting fixed contact 20, a moving contact 21, an isolating fixed contact 22, a transmission screw 23 and a grounding fixed contact 26, wherein the transmission screw 23 is arranged in the isolating fixed contact 22 and the grounding fixed contact 26 in a penetrating way and is in threaded connection with the moving contact 21, and the transmission screw 23 is rotatably arranged to drive the moving contact 21 to move so that the moving contact 21 can be selectively inserted on the connecting fixed contact 20; the two ends of the isolation static contact 22 are sleeved with at least one first equalizing ring 201; the second equalizing ring 202 is sleeved on the fixed contact 20 and is positioned between the moving contact 21 and the fixed contact 20; wherein, the outer loop face of first equalizer ring 201 and second equalizer ring 202 is by the arc around the rotatory round of axis of transmission lead screw formation, like this, through the setting of first equalizer ring 201, can wrap up the both ends at isolation static contact 22, avoid the marginal department at isolator both ends to discharge, play the effect of even electric field, through the setting of second equalizer ring 202, can wrap up the tip of switch-on static contact, avoid the marginal department of its tip to discharge, further play the effect of even electric field, thereby when isolator structure installs in the air chamber 100 of air tank 1, improve its insulating properties.

Wherein, the outer annular surfaces of the first equalizing ring 201 and the second equalizing ring 202 are outer surfaces extending along the circumferential direction thereof.

Specifically, the first grading ring 201 and the second grading ring 202 are each made of an aluminum material.

Specifically, the end of the on stationary contact 20 is rounded; the two ends of the isolating static contact 22 are rounded.

Preferably, the isolating switch structure includes a plurality of shielding nets respectively located at both ends of the connection conductor 240 along the extension direction of the connection conductor 240, each shielding net being located inside the insulating sleeve 241 and sleeved outside the connection conductor 240 to further shield the local electric field through the shielding net; and/or, along the extension direction of the connection conductor 240, the outer surfaces of both ends of the connection insulator 24 are provided with shielding layers formed of a semiconductor paint material or a semiconductor glaze material applied to the outer surfaces of both ends of the connection insulator 24 to reduce the resistivity of the surface of the insulation cover 241. By the arrangement, the insulation level of the connection insulator is further improved.

Specifically, the vacuum circuit breaker 3 further includes an insulating tie rod 301 and an operating mechanism 302, the insulating tie rod 301 being movably disposed within the encapsulated pole 300, the operating mechanism 302 being connected to the insulating tie rod 301 to drive the insulating tie rod 301 to move by the operating mechanism 302. The vacuum circuit breaker body adopts a smooth large-creepage-distance insulation pull rod structure, so that the electric strength of the circuit breaker body is improved, the electric field distribution of solid insulating parts is optimized, and the insulation performance is improved.

In the present utility model, the range of the distance between the axes of two adjacent solid sealed polar poles 300 is greater than 210mm, so as to increase the distance between two adjacent solid sealed polar poles 300, thereby further optimizing the electric field.

As shown in fig. 1, the environment-friendly insulating cabinet includes a plurality of side parallel buses 4, the plurality of side parallel buses 4 are all installed in the first air chamber 101, a plurality of isolating switch structures are connected with the plurality of side parallel buses in a one-to-one correspondence, and each side parallel bus 4 includes: a side parallel conductor 40, a first branch conductor 41, a first fastening member 42 and a second fastening member 43, wherein one end of the first branch conductor 41 is connected with the side parallel conductor 40 through the first fastening member 42, and the other end of the first branch conductor 41 is connected with the connecting static contact 20 of the corresponding isolating switch structure 200 through the second fastening member 43; a side bushing 44, at least part of the side bushing 44 being made of an insulating material, the side bushing 44 being connected to one end of the side bushing 40 such that the side bushing 4 passes through the side bushing 44; a first shielding cover 45, wherein the first shielding cover 45 is sleeved on the first fastening piece 42; and a second shielding cover 46, wherein the second shielding cover 46 is sleeved on the second fastening piece 43. Wherein the first shield case 45 and the second shield case 46 are each made of an aluminum material. By the arrangement of the first shielding cover 45 and the second shielding cover 46, the edge of the end part of the first fastening piece 42 and the edge of the end part of the second fastening piece 43 can be prevented from discharging, so that the electric field is further optimized, and the insulation performance of the environment-friendly insulation cabinet is further improved.

Preferably, at least part of the first branch conductor 41 is in a columnar structure, so that the arc-shaped surface of the outer surface of the first branch conductor 41 further optimizes the electric field structure inside the environment-friendly insulating cabinet and further improves the insulating performance; and/or, the environment-friendly insulating cabinet further comprises a third fastening piece 47 and a third shielding cover 48, wherein the third fastening piece 47 is inserted on the side parallel conductor 40 and the first branch conductor 41, the third fastening piece 47 is positioned at one end of the first fastening piece 42 far away from the connecting static contact 20, the third shielding cover 48 is provided with an avoidance hole 480, and after the third shielding cover 48 is covered on the side parallel conductor 40, the avoidance hole 480 is avoided from the third fastening piece 47; wherein, the end of the first branch conductor 41 is located inside the third shielding cover 48, the connection between the first branch conductor 41 and the side parallel conductor 40 is stable by the arrangement of the third fastening piece 47, and the edge of the end of the third fastening piece 47 can be prevented from discharging by the arrangement of the third shielding cover 48, so that the electric field is optimized; and/or the second fastening members 43 are plural, and the second shielding case 46 is provided over the plural second fastening members 43 to stabilize the connection between the first branch conductor 41 and the side-by-side conductor 40 while optimizing the electric field.

Specifically, the side union sleeve 44 includes: a conductor portion 440, the conductor portion 440 being connected to the side conductor 40; an insulation sleeve 441, the insulation sleeve 441 wrapping the conductor portion 440, the insulation sleeve 441 including an inner sleeve section 442 and an outer sleeve section 443 connected to each other, such that a third shielding groove 444 is formed between the inner sleeve section 442 and the outer sleeve section 443, to shield a local electric field at three junctions of the conductor portion 440, the insulation sleeve 441 and air by the third shielding groove 444, thereby further improving insulation.

In the present utility model, a part of the sleeve section of the inner sleeve section 442 is spaced apart from the conductor portion 440 such that a fourth shielding groove 445 is formed between the inner sleeve section 442 and the conductor portion 440 to shield a local electric field at three junctions of the conductor portion 440, the insulating sleeve 441 and air by the combined action of the fourth shielding groove 445 and the third shielding groove 444, thereby further improving insulation; and/or the side-by-side sleeve 44 includes a hydrophobic layer on the outer surface of the outer sleeve 443, the hydrophobic layer being formed of a vulcanized silicone rubber coating applied to the outer surface of the outer sleeve 443 to increase the flashover voltage of the surface of the insulating sleeve 441. Specifically, the surface of the insulating material is subjected to hydrophobic treatment by adopting a vulcanized silicone rubber coating so as to form a hydrophobic layer.

Specifically, the vacuum circuit breaker 3 has a plurality of solid-sealed poles 300, each of the isolating switch structures 200 includes a connection insulator 24, the plurality of solid-sealed poles 300 are connected in one-to-one correspondence with the connection insulators of the plurality of isolating switch structures, and the environment-friendly insulating cabinet includes: a fourth fastener 51 and a plurality of second branch conductors 50, one end of each second branch conductor 50 being connected to the connection insulator 24 through the fourth fastener 51, the other end of each second branch conductor 50 being connected to the corresponding solid-sealed pole 300 of the vacuum circuit breaker 3; a fourth shield 53, the fourth shield 53 being provided over the fourth fastener 51 to prevent discharge at the edge of the end of the fourth fastener 51, further optimizing the electric field.

The first fastening piece, the second fastening piece, the third fastening piece and the fourth fastening piece are all bolts; the bolt is a carbon steel black bolt, which is helpful for heat dissipation.

Specifically, the connection insulator 24 includes a connection conductor 240 and an insulation sleeve 241, one end of the connection conductor 240 is connected with the isolation static contact 22, the other end of the connection conductor 240 is used for being connected with the vacuum circuit breaker 3, and the insulation sleeve 241 wraps the connection conductor 240; along the extending direction of the connection conductor 240, both ends of the insulating sleeve 241 include an inner insulating ring 2410 and an outer insulating ring 2411, and the inner insulating ring 2410 and the outer insulating ring 2411 are connected with each other to form a first shielding groove 2412, wherein a connection section between the inner insulating ring 2410 and the outer insulating ring 2411 is an arc section, so that a local strong electric field is shielded at the junction of the connection conductor 240, the insulating sleeve 241 and the gas "three junctions" through the first shielding groove 2412. Wherein the insulating cover 241 is made of an epoxy material.

Specifically, the first air chamber 101 and the second air chamber 102 are partitioned by the intermediate partition plate 11, and the isolating switch structure further includes: the support insulator 25, one end of the support insulator 25 is connected with the connecting fixed contact 20, and the other end of the support insulator 25 is used for being connected with the middle partition plate 11; along the extending direction of the supporting insulator 25, one end of the supporting insulator 25 connected with the connecting static contact 20 is provided with a second shielding groove 251, the supporting insulator 25 further comprises a connecting piece 252 used for being connected with the connecting static contact 20, and the second shielding groove 251 is arranged around the connecting piece 252; wherein, the connecting piece 252 is a conductor, and through the arrangement of the second shielding groove 251, the local electric field at the connecting piece 252, the insulating piece and the air triangle boundary is shielded, and the insulating performance is further improved.

As shown in fig. 21 to 24, the environment-friendly insulating cabinet of the present utility model includes: the positioning block 71, the positioning block 71 is fixedly arranged on the first side plate 12 of the air box 1 and positioned at the inner side of the air box 1, the middle partition plate 11 is provided with a positioning groove 110, and the positioning groove 110 is matched with the positioning block 71 to install the middle partition plate 11; the positioning reinforcing rib 72, the positioning reinforcing rib 72 comprises a supporting rib section 721 and a connecting rib section 722, the supporting rib section 721 is arranged on the second side plate 13 of the air box 1, one end of the connecting rib section 722 is connected with the supporting rib section 721, and the other end of the connecting rib section 722 is connected with the middle partition plate 11; wherein, the first side plate 12 and the second side plate 13 are arranged at a preset included angle. Through the arrangement, the positioning of the middle partition plate is facilitated, and the problem that the middle partition plate is difficult is solved.

As shown in fig. 24, the middle partition 11 is a double-layer board, and the middle partition includes a first board body portion and a second board body portion stacked on each other, the first board body portion is located above the second board body portion, the positioning block 71 is located on a wall surface of a side of the second board body portion away from the first board body portion, and the positioning groove 110 is disposed on the second board body portion.

In order to ensure the insulation and sealing of the incoming and outgoing line terminal 56, the environment-friendly insulation cabinet of the present utility model comprises: a plurality of third branch conductors 55 and a plurality of in-out wire terminals 56, one end of each in-out wire terminal 56 is used for being connected with a voltage device, the other end of each in-out wire terminal 56 is connected with a corresponding third branch conductor 55, and each third branch conductor 55 is connected with a corresponding solid-sealed pole 300 of the vacuum circuit breaker 3; wherein each of the incoming and outgoing line terminals 56 is an inner cone sleeve.

Because when a large amount of environment-friendly gas is introduced into the environment-friendly insulating cabinet, the internal pressure of the environment-friendly insulating cabinet is increased, so that the environment-friendly insulating cabinet is expanded and deformed, and in order to ensure the structural strength of the environment-friendly insulating cabinet, the environment-friendly insulating cabinet comprises: a plurality of first reinforcing ribs 61, the plurality of first reinforcing ribs 61 being arranged at intervals along the first direction; a plurality of second reinforcing ribs 62, the plurality of second reinforcing ribs 62 being disposed at intervals along the second direction; each second reinforcing rib 62 and each first reinforcing rib 61 are provided on the first side plate 12 of the air box 1 and located outside the air box 1; wherein, the first direction and the second direction are arranged at a preset included angle.

In the present utility model, as shown in fig. 26, each of the first reinforcing bead 61 and the second reinforcing bead 62 of the present utility model includes: an inner reinforcing rib section 601 and an outer reinforcing rib section 602, wherein the outer reinforcing rib section 602 is covered on the inner reinforcing rib section 601; wherein, interior strengthening rib section 601 and outer strengthening rib section 602 are the U-shaped structure that is formed by first board section, second board section and the third board section that connect gradually, and first board section and third board section parallel arrangement like this can satisfy the cabinet requirement under the condition that does not change the length between first board section and the third board section, promotes the intensity of gas tank 1.

In the utility model, the air box 1 is formed by splicing and welding 3.0 stainless steel plates through a laser welding process, and the laser welding technology can furthest ensure that the excellent characteristics of the austenitic stainless steel plates are not damaged, and ensure the welding effect and the anti-vortex characteristic of the box body.

Specifically, all offered the access hole on the wall of first air chamber and the wall of second air chamber, each access hole all is through the shutoff of access shrouding 8, and access shrouding 8 adopts light in weight, easy processing, good aluminum plate of thermal conductivity, and access shrouding 8 adopts the face box inside side to cut open light and chamfer technology, guarantees planar smoothness and electrode shape, avoids tip discharge. The aluminum plate has good heat dissipation performance and reasonable position layout, and can promote the rapid heat dissipation in the box body.

In the embodiment of the utility model, the inside of the air box 1 is filled with clean environment-friendly air with micro positive pressure, and the insulation performance of the clean air is improved by properly increasing the charging pressure, so that the air is safe and nontoxic, has low cost and is easy to obtain, the dry air can be dried by a dry air generating device, and the impurities and the moisture in the atmosphere are filtered to obtain the dry air meeting the standard specification, and the industrial high-purity N can also be adopted ₂ And high purity O for industrial use ₂ Dry air was synthesized by hand. With SF ₆ In contrast, the pressure resistance of dry air is relatively insensitive to metal particles, so that the metal particles generated during the production process or during use are less harmful to dry air-insulated switching devices, but because of N ₂ Insulation and SF of (2) ₆ Worse, more N needs to be introduced ₂ The insulation property in the insulation cabinet is ensured, so that the pressure in the insulation cabinet is high, the insulation cabinet is easy to expand and deform, and the environment-friendly insulation cabinet optimizes the electric field in the environment-friendly insulation cabinet and greatly improves the insulation property in the environment-friendly insulation cabinet, thereby reducing the amount of introduced nitrogen, reducing the pressure of the environment-friendly insulation cabinet and relieving the deformation degree of the environment-friendly insulation cabinet.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the utility model provides an environment-friendly insulating cabinet, which comprises an air box 1, a disconnecting switch 2 and a vacuum circuit breaker 3, wherein the air box 1 is provided with a first air chamber 101 and a second air chamber 102, the first air chamber 101 is positioned above the second air chamber 102, the vacuum circuit breaker 3 is arranged in the second air chamber 102, the disconnecting switch 2 is arranged in the first air chamber 101, the disconnecting switch 2 is connected with the vacuum circuit breaker 3, the disconnecting switch 2 comprises a plurality of disconnecting switch structures 200, and each disconnecting switch structure comprises: the device comprises a connecting fixed contact 20, a moving contact 21, an isolating fixed contact 22, a transmission screw 23 and a grounding fixed contact 26, wherein the transmission screw 23 is arranged in the isolating fixed contact 22 and the grounding fixed contact 26 in a penetrating way and is in threaded connection with the moving contact 21, and the transmission screw 23 is rotatably arranged to drive the moving contact 21 to move so that the moving contact 21 can be selectively inserted on the connecting fixed contact 20; the two ends of the isolation static contact 22 are sleeved with at least one first equalizing ring 201; the second equalizing ring 202 is sleeved on the fixed contact 20 and is positioned between the moving contact 21 and the fixed contact 20; wherein, the outer loop face of first equalizer ring 201 and second equalizer ring 202 is by the arc around the rotatory round of axis of transmission lead screw formation, like this, through the setting of first equalizer ring 201, can wrap up the both ends at isolation static contact 22, avoid the marginal department at isolator both ends to discharge, play the effect of even electric field, through the setting of second equalizer ring 202, can wrap up the tip of switch-on static contact, avoid the marginal department of its tip to discharge, further play the effect of even electric field, thereby when isolator structure installs in the air chamber 100 of air tank 1, improve its insulating properties.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides an environmental protection insulated cabinet, includes gas tank (1), isolator (2) and vacuum circuit breaker (3), gas tank (1) have first air chamber (101) and second air chamber (102), first air chamber (101) are located the top of second air chamber (102), vacuum circuit breaker (3) are installed in second air chamber (102), isolator (2) are installed in first air chamber (101), isolator (2) with vacuum circuit breaker (3) are connected, isolator (2) include a plurality of isolator structures (200), its characterized in that, each isolator structure (200) all include:

the device comprises a connecting fixed contact (20), a moving contact (21), an isolating fixed contact (22), a transmission screw rod (23) and a grounding fixed contact (26), wherein the transmission screw rod (23) is arranged in the isolating fixed contact (22) and the grounding fixed contact (26) in a penetrating way and is in threaded connection with the moving contact (21), and the transmission screw rod (23) is rotatably arranged to drive the moving contact (21) to move so that the moving contact (21) can be selectively inserted on the connecting fixed contact (20);

the two ends of the isolation static contact (22) are sleeved with at least one first equalizing ring (201);

the second equalizing ring (202) is sleeved on the connecting fixed contact (20) and is positioned between the moving contact (21) and the connecting fixed contact (20);

the outer annular surfaces of the first equalizing ring (201) and the second equalizing ring (202) are formed by rotating an arc wire around the axis of the transmission screw rod for one circle.

2. The environmentally friendly insulating cabinet according to claim 1, wherein the environmentally friendly insulating cabinet comprises a plurality of side parallel buses (4), wherein a plurality of the side parallel buses (4) are all installed in the first air chamber (101), a plurality of the isolating switch structures (200) are connected with a plurality of the side parallel buses (4) in a one-to-one correspondence manner, and each of the side parallel buses (4) comprises:

side parallel conductors (40),

a first branch conductor (41), a first fastener (42) and a second fastener (43), wherein one end of the first branch conductor (41) is connected with the side parallel conductor (40) through the first fastener (42), and the other end of the first branch conductor (41) is connected with a corresponding connecting static contact (20) of the isolating switch structure (200) through the second fastener (43);

a side bushing (44), at least part of the side bushing (44) being made of an insulating material, the side bushing (44) being connected to one end of the side bushing (40) such that the side bushing (4) is bushing-lined by the side bushing (44);

a first shielding cover (45), wherein the first shielding cover (45) is sleeved on the first fastening piece (42);

and a second shielding cover (46), wherein the second shielding cover (46) is sleeved on the second fastening piece (43).

3. The environment-friendly insulated cabinet according to claim 2, wherein,

at least part of the first branch conductor (41) is of a columnar structure; and/or the number of the groups of groups,

the environment-friendly insulating cabinet further comprises a third fastening piece (47) and a third shielding cover (48), wherein the third fastening piece (47) is inserted into the side parallel conductor (40) and the first branch conductor (41), the third fastening piece (47) is positioned at one end, far away from the connecting static contact (20), of the first fastening piece (42), the third shielding cover (48) is provided with an avoidance hole (480), and after the third shielding cover (48) is covered on the side parallel conductor (40), the avoidance hole (480) is avoided from the third fastening piece (47); wherein an end of the first branch conductor (41) is located inside the third shield (48); and/or the number of the groups of groups,

the second fastening members (43) are plural, and the second shielding cover (46) is covered on the plural second fastening members (43).

4. The environmentally friendly insulating case of claim 2 wherein the side-by-side sleeve (44) comprises:

a conductor portion (440), the conductor portion (440) being connected to the side conductor (40);

an insulation sleeve (441), the insulation sleeve (441) being wrapped around the outside of the conductor portion (440), the insulation sleeve (441) comprising an inner tube section (442) and an outer tube section (443) being connected to each other such that a third shielding groove (444) is formed between the inner tube section (442) and the outer tube section (443).

5. The environment-friendly insulated cabinet according to claim 4, wherein,

a portion of the inner sleeve section (442) is spaced apart from the conductor portion (440) such that a fourth shielding groove (445) is formed between the inner sleeve section (442) and the conductor portion (440); and/or the number of the groups of groups,

the side union sleeve (44) includes a hydrophobic layer located on an outer surface of the outer sleeve section (443), the hydrophobic layer being formed from a cured silicone rubber coating applied to the outer surface of the outer sleeve section (443).

6. The environmentally friendly insulating cabinet according to claim 1, wherein the vacuum circuit breaker (3) has a plurality of solid-sealed poles (300), each of the isolating switch structures (200) includes a connection insulator (24), the plurality of solid-sealed poles (300) are connected in one-to-one correspondence with the connection insulators (24) of the plurality of isolating switch structures (200), the environmentally friendly insulating cabinet comprising:

a fourth fastener (51) and a second branch conductor (50), one end of the second branch conductor (50) is connected with the connecting insulator (24) through the fourth fastener (51), and the other end of each second branch conductor (50) is connected with a corresponding solid-sealed pole (300) of the vacuum circuit breaker (3);

-a fourth shielding (53), said fourth shielding (53) being provided over said fourth fastening (51).

7. The environment-friendly insulated cabinet according to claim 6, wherein,

the connecting insulator (24) comprises a connecting conductor (240) and an insulating sleeve (241), one end of the connecting conductor (240) is connected with the isolating static contact (22), the other end of the connecting conductor (240) is used for being connected with the vacuum circuit breaker (3), and the insulating sleeve (241) is wrapped on the outer side of the connecting conductor (240);

along the extending direction of the connecting conductor (240), two ends of the insulating sleeve (241) comprise an inner insulating ring (2410) and an outer insulating ring (2411), the inner insulating ring (2410) and the outer insulating ring (2411) are connected with each other to form a first shielding groove (2412), and a connecting section between the inner insulating ring (2410) and the outer insulating ring (2411) is an arc section.

8. The environment-friendly insulating cabinet according to claim 1, wherein the first air chamber (101) and the second air chamber (102) are separated by an intermediate partition (11), and each of the isolating switch structures comprises:

the support insulator (25), one end of the support insulator (25) is connected with the connecting static contact (20), and the other end of the support insulator (25) is connected with the middle partition plate (11);

along the extending direction of the supporting insulator (25), one end of the supporting insulator (25) connected with the connecting static contact (20) is provided with a second shielding groove (251), the supporting insulator (25) further comprises a connecting piece (252) used for being connected with the connecting static contact (20), and the second shielding groove (251) is arranged around the connecting piece (252); wherein the connector (252) is made of a metallic material.

9. The environmentally friendly insulating cabinet of claim 8, wherein the environmentally friendly insulating cabinet comprises:

the positioning block (71), the positioning block (71) is fixedly arranged on the first side plate (12) of the air box (1) and positioned at the inner side of the air box (1), the middle partition plate (11) is provided with a positioning groove (110), and the positioning groove (110) is matched with the positioning block (71) so as to install the middle partition plate (11);

the positioning reinforcing rib (72), the positioning reinforcing rib (72) comprises a supporting rib section (721) and a connecting rib section (722), the supporting rib section (721) is arranged on the second side plate (13) of the air box (1), one end of the connecting rib section (722) is connected with the supporting rib section (721), and the other end of the connecting rib section (722) is connected with the middle partition plate (11); wherein, the first side plate (12) and the second side plate (13) are arranged at a preset included angle.

10. The environmentally friendly insulating cabinet of any one of claims 1 to 9, wherein the environmentally friendly insulating cabinet comprises:

a plurality of first reinforcing ribs (61), the plurality of first reinforcing ribs (61) being arranged at intervals along a first direction;

a plurality of second reinforcing ribs (62), wherein the plurality of second reinforcing ribs (62) are arranged at intervals along a second direction;

each second reinforcing rib (62) and each first reinforcing rib (61) are arranged on the first side plate (12) of the air box (1) and are positioned outside the air box (1); the first direction and the second direction are arranged at a preset included angle.