CN114188838A

CN114188838A - Ring main unit

Info

Publication number: CN114188838A
Application number: CN202111483211.1A
Authority: CN
Inventors: 曾雄飞; 黄晓波; 黄国斌; 李吉成; 华坤修; 伍建俊; 田坤隆; 欧伟清
Original assignee: Guangzhou Southern Power Group Electric Apparatus Co ltd
Current assignee: Guangzhou Southern Power Group Electric Apparatus Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-15

Abstract

The ring main unit comprises a first box body and a second box body which are butted, wherein a gap which leads to the interior of the box bodies is exposed at the butted part of the first box body and the second box body; the first box body is provided with a door plate; the door panel shields the gap. The door plant shelters from the clearance at the butt joint position of two boxes, and this clearance just can not directly expose outside, and looped netowrk cabinet security is higher.

Description

Ring main unit

Technical Field

The invention relates to electrical equipment, in particular to a ring main unit.

Background

The ring main unit is an electrical device with high-voltage switch equipment installed inside a metal cabinet or inside a non-metal cabinet, and generally comprises a plurality of box bodies with different functions and installed together, wherein the box bodies are respectively an air box, an instrument box, a mechanism box, a cable box and the like. The butt joint part of two adjacent boxes may leave a gap which is exposed and leads to the inside of the box due to process defects or installation errors, so that potential safety hazards are brought, and the safety is low.

Disclosure of Invention

The invention aims to provide a ring main unit which is high in safety.

In order to solve the technical problem, the ring main unit comprises a first box body and a second box body which are butted, wherein a gap leading to the interior of the box bodies is exposed at the butted part of the first box body and the second box body; the first box body is provided with a door plate; the door panel shields the gap.

Furthermore, all or part of the gap is positioned at a first butt joint part of the first box body, which is butted with the second box body, and the door plate shields the first butt joint part of the first box body; and/or the whole or part of the gap is positioned at a second butt joint part of the second box body, which is butted with the first box body, and the door plate extends to the side of the first box body to shield the second butt joint part of the second box body.

Furthermore, the first butt joint part is provided with a first assembly and a second assembly which are connected together, the whole or part of the gap is positioned at the first joint part of the second assembly, which is connected with the first assembly, and the door panel shields the first joint part of the second assembly; and/or the second butt joint part is provided with a third component and a fourth component which are connected together, the whole or part of the gap is positioned at a second connecting part of the fourth component, which is connected with the third component, and the door plate extends to the side of the first box body to shield the second connecting part of the fourth component.

Further, the first and second components are aligned with each other; and/or the third and fourth components are aligned with each other.

Further, the first module is located at a position offset to the second housing with respect to the second module in a direction in which the first housing and the second housing are opposed; and/or the fourth component is positioned to be offset from the third component towards the first housing in a direction opposite the first and second housings.

Furthermore, the first box body is arranged below or above the second box body, or the number of the first box bodies is two, and the two first box bodies are respectively arranged below and above the second box body.

Furthermore, the first assembly is a first vertical plate, the first assembly is provided with two parallel first transverse plates, the second assembly is a first transverse plate connected between the two first vertical plates, and the two first vertical plates are deviated to the second box body in the vertical direction than the first transverse plates; and/or the third subassembly is the second riser, and the third subassembly has two of parallel, and the fourth subassembly is the second diaphragm of connecting between two second risers, and the second diaphragm is than two second risers deviation first box in the vertical direction.

Further, the second case is an operating mechanism case; the first box body is a cable box positioned below the operating mechanism box, or the first box body is an instrument box positioned above the operating mechanism box, or the first box body is provided with two first box bodies, wherein one first box body is the cable box positioned below the operating mechanism box, and the other first box body is the instrument box positioned above the operating mechanism box.

The door plant shelters from the clearance at the butt joint position of two boxes, and this clearance just can not directly expose outside, and looped netowrk cabinet security is higher.

Drawings

Fig. 1 is an axonometric view of the ring main unit.

Fig. 2 is a first exploded view of the ring main unit, and the view angle in the figure is from the top of the ring main unit to the ring main unit.

Fig. 3 is a second exploded view of the ring main unit, and the view angle in the figure is from the lower oblique direction of the ring main unit to the ring main unit.

Fig. 4 is a front view of the ring main unit, in which the first door panel and the third door panel are removed.

Fig. 5 is a partially enlarged view of fig. 4, in which a portion a of fig. 4 is enlarged.

Fig. 6 is a partially enlarged view of fig. 4, in which a portion B of fig. 4 is enlarged.

Fig. 7 is a partially enlarged view of fig. 4, in which a portion C of fig. 4 is enlarged.

Fig. 8 is a partially enlarged view of fig. 4, in which a portion D of fig. 4 is enlarged.

FIG. 9 is an enlarged partial view of FIG. 4, taken at an enlarged scale from FIG. 4 at point A, showing a first door panel covering the first gap.

FIG. 10 is an enlarged partial view of FIG. 4, with the portion C of FIG. 4 enlarged, and with a third door panel covering the second gap.

FIG. 11 is a front view of a second embodiment of the present invention with the first door panel and the third door panel removed.

Fig. 12 is a partially enlarged view of fig. 11, in which a portion H of fig. 11 is enlarged.

Fig. 13 is a partially enlarged view of fig. 11, in which a portion I of fig. 11 is enlarged.

Fig. 14 is a partially enlarged view of fig. 11, in which a portion J of fig. 11 is enlarged.

Fig. 15 is a partially enlarged view of fig. 11, in which a portion K of fig. 11 is enlarged.

Detailed Description

The invention is described in further detail below with reference to specific embodiments.

Referring to fig. 1, the ring main unit includes a cable box 1, an operating mechanism box 2 located above the cable box 1, an instrument box 3 located above the operating mechanism box 2, and an air box 9 located behind the operating mechanism box 2, with the direction indicated by an arrow F in fig. 1 as a front direction. Referring to fig. 2, a cable accommodating cavity 102 is formed in a front portion 101 of the cable box 1 to accommodate each cable of the ring main unit, a pressure relief cavity 104 is formed in a rear portion 103, an upper port 1041 of the pressure relief cavity 104 is in butt joint with the air box 9 to relieve pressure in the air box 9, an isolation switch (not shown) and a grounding switch (not shown) are arranged inside the air box 9, and an isolation switch operating mechanism 28 and a grounding switch operating mechanism 29 are arranged inside the operating mechanism box 2. The operator controls the disconnecting switch through the disconnecting switch operating mechanism 28 to electrify or cut off a primary cable (not shown in the figure) of the ring main unit, and controls the grounding switch through the grounding switch operating mechanism 29 to make the ring main unit grounded or ungrounded. The gas box 9 is filled with SF6 gas, which has good electrical insulation and arc extinguishing performance and can protect the disconnecting switch and the grounding switch in the gas box 9. The instrument box 3 is provided with various indicator lamps 31 to display the working state of the ring main unit.

Referring to fig. 2 and 3, the top 11 of the front part 101 of the cable box 1 is abutted against the bottom 21 of the operating mechanism box 2, the top 11 of the front part 101 of the cable box 1 is provided with a first threading hole 111, the bottom 21 of the operating mechanism box 2 is provided with a second threading hole 212 aligned with the first threading hole 111, and part of cables in the operating mechanism box 2 can sequentially penetrate into the cable box 1 through the second threading hole 212 and the first threading hole 111. The top 22 of the operating mechanism box 2 is abutted to the bottom 32 of the instrument box 3, the top 22 of the operating mechanism box 2 is provided with a third threading hole 223, the bottom 32 of the instrument box 3 is provided with a fourth threading hole 324 aligned with the third threading hole 223, and partial cables in the instrument box 3 can penetrate into the operating mechanism box 2 through the fourth threading hole 324 and the third threading hole 223 in sequence. The cable box 1 includes a first frame 10, a cable accommodating cavity 102 and a pressure relief cavity 104 are provided on the first frame 10, and a first door panel 15 is covered at a front cavity port 1021 of the cable accommodating cavity 102. The operating mechanism box 2 comprises a second frame 20, the second frame 20 encloses an operating mechanism accommodating cavity 202, the disconnecting switch operating mechanism 28 and the grounding switch operating mechanism 29 are positioned in the operating mechanism accommodating cavity 202, and a second door panel 25 is covered at a front cavity opening 2021 of the operating mechanism accommodating cavity 202. The instrument box 3 includes a third frame 30, the third frame 30 encloses a low-voltage component accommodation cavity 302, a low-voltage component (not shown) is disposed in the low-voltage component accommodation cavity 302, and a third door panel 35 is covered at a front cavity port 3021 of the low-voltage component accommodation cavity 302.

In most of the existing ring main units, referring to fig. 2, any one of the first frame 10, the second frame 20 and the third frame 30 is formed by connecting a plurality of metal components, the metal components are formed by bending sheet metal parts, the sheet metal parts generate bending angles after being bent, and a part of the bending angles are located at the butt joint position of the two box bodies, for example, referring to fig. 11, two

bending angles

1814 and 2814 in the figure are located on the front surface of the butt joint position of the cable box 1 and the operating mechanism box 2, so that a first gap 41 is exposed on the front surface of the butt joint position of the cable box 1 and the operating mechanism box 2. Referring to fig. 2, the top 11 of the front part 101 of the cable box 1 is not provided with a top plate, that is, the first gap 41 (see fig. 11) leads to the inside of the cable box 1 through the first threading hole 111 and also leads to the inside of the operating mechanism box 2 through the second threading hole 212 (see fig. 3), so that the ring main unit has a potential safety hazard. In view of the above potential safety hazards, referring to fig. 5 and 9, the ring main unit uses the first door panel 15 of the cable box 1 to shield the first gap 41 at the butt joint portion between the cable box 1 and the operating mechanism box 2, referring to fig. 7 and 10, and uses the third door panel 35 of the instrument box 3 to shield the second gap 42 at the butt joint portion between the instrument box 3 and the operating mechanism box 2, so that the

gaps

41 and 42 are not exposed, and the safety is high.

Taking the direction indicated by the arrow G in fig. 1 as the left, as shown in fig. 4, 5 and 6, the first frame 10 of the cable box 1 includes a first left vertical plate 171 and a first right vertical plate 172, a left vertical surrounding edge 173 is connected to the right of the first left vertical plate 171 by bolts, and a right vertical surrounding edge 174 is connected to the left of the first right vertical plate 172 by bolts. The top of the first frame 10 is provided with a horizontal surrounding edge 18, and the left and right ends 181, 182 of the horizontal surrounding edge 18 are respectively erected above the left vertical surrounding edge 173 and above the right vertical surrounding edge 174. The

upper ends

1711, 1721 of both the first left riser 171 and the first right riser 172 are located higher than the lateral skirt 18. The second frame 20 of the operating mechanism box 2 includes a second left riser 271 and a second right riser 272, a lower cross member 281 is provided at the bottom of the second frame 20, and left and

right ends

2811, 2812 of the lower cross member 281 are respectively connected to the

lower ends

2711, 2721 of the second left riser 271 and the

lower ends

2711, 2721 of the second right riser 272 by bolts. The bottom of the lower cross member 281 is vertically lower than the

lower ends

2711, 2721 of the two

second risers

271, 272. When letting cable box 1 and operating device case 2 dock together, the installer places operating device case 2 in cable box 1 top earlier, under this state, second left riser 271 docks first left riser 171, second right riser 272 docks first right riser 172, bottom end rail 281 docks horizontal surrounding 18, then operating personnel links together second left riser 271 and first left riser 171 with the bolt in proper order, link together second right riser 272 and first right riser 172, link together bottom end rail 281 and horizontal surrounding 18, can accomplish the butt joint of both foreparts of cable box 1 and operating device case 2.

As shown in fig. 5 and 6, first gaps 41 are provided at the front left and front right portions of the abutting portion between the cable box 1 and the operating mechanism box 2, and the two first gaps 41 are located on the left and right. The left and right portions of the first door panel 15 (see fig. 3) block the two first gaps 41, respectively. Regarding the left portion of the first door panel 15 (see fig. 3) shielding the first gap 41 on the left, see fig. 5 and 9, the left end 2813 of the bottom of the lower cross member 281 of the operating mechanism case 2 has a folding angle 2814, and the left end 181 of the lateral surrounding edge 18 of the cable case 1 also has a folding angle 1814, so that the first gap 41 is exposed at the left front portion of the butt joint portion of the cable case 1 and the operating mechanism case 2, and the upper portion of the first gap 41 is located at the left end 2813 of the bottom of the lower cross member 281, and the lower portion thereof is located at the left end 181 of the lateral surrounding edge 18. The first door panel 15 not only shields the left end 181 of the lateral surrounding edge 18 to shield the lower portion of the first gap 41, but also extends upward above the first frame 10 of the cable box 1 to shield the left end 2813 of the bottom of the lower cross member 281 to shield the upper portion of the first gap 41. The left front portion and the right front portion of the abutting portion between the cable box 1 and the operating mechanism box 2 are bilaterally symmetrical, and the right portion of the first door panel 15 shields the first gap 41 on the right side, which is not described in detail in this embodiment.

Referring to fig. 2, the top plate is not provided on the top of the second frame 20, the top beam 282 is provided on the top of the second frame 20, referring to fig. 7 and 8, the left and

right ends

2821, 2822 of the top beam 282 are respectively connected with the upper end 2712 of the second left vertical plate 271 and the upper end 2722 of the second right vertical plate 272 through bolts, and the top of the top beam 282 is vertically higher than the

upper ends

2712, 2722 of the two

vertical plates

271, 272. The third frame 30 includes a third left riser 371 and a third right riser 372, a first bottom plate 381 is provided between the bottoms of the third left riser 371 and the third right riser 372, and

lower ends

3712, 3722 of the third left riser 371 and the third right riser 372 are lower than the first bottom plate 381. An instrument box surrounding edge 382 is arranged above the first bottom plate 381, and left and

right ends

3821 and 3822 of the instrument box surrounding edge 382 are fixedly connected with a third left vertical plate 371 and a third right vertical plate 372 through bolts respectively. When letting instrument box 3 and operating device case 2 dock together, the installer places instrument box 3 in operating device case 2 top earlier, under this state, third left riser 371 docks second left riser 271, third right riser 372 docks second right riser 272, first bottom plate 381 docks entablature 282, then the operating personnel links together third left riser 371 and second left riser 271 with the bolt in proper order, link together third right riser 372 and second right riser 272, instrument box surrounding edge 382, first bottom plate 381 and entablature 282 link together, can accomplish the butt joint of instrument box 3 and operating device case 2 both foreportions.

As shown in fig. 7 and 8, the second gaps 42 are exposed at both the left and right front portions of the butt joint portion of the operating mechanism case 2 and the meter case 3, and the two second gaps 42 are located one on the left and the other on the right. The left and right portions of the third door panel 35 (see fig. 3) block the two second gaps 42, respectively. With respect to the left portion of the third door panel 35 (see fig. 3) blocking the left second gap 42, as seen in fig. 7 and 10, the left end 2823 of the top portion of the upper cross member 282 has a bent angle 2824, so that the lower left portion of the abutting portion of the instrument box 3 and the operating mechanism box 2 is exposed with a small gap 422. The left end 3823 of the bottom of the instrument box peripheral edge 382 also has a bent angle 3824, so that an upper left portion of the butt joint portion of the instrument box 3 and the operating mechanism box 2 is exposed with an upper small gap 421, and the two

small gaps

421 and 422 are collectively referred to as a second gap 42. The third door panel 35 shields not only the left end 3823 of the bottom of the instrument box skirt 382 to shield the small gap 421 lying thereabove, but also the left end 2823 of the top of the upper cross member 282 extending downward above the third frame 30 of the instrument box 3 to shield the small gap 422 lying therebelow. The left front portion and the right front portion of the abutting portion between the operating mechanism box 2 and the instrument box 3 are bilaterally symmetrical, and the right portion of the third door panel 35 shields the second gap 42 on the right, which will not be described in detail in this embodiment.

Referring to fig. 3, the instrument box 3 has a fourth wire passing hole 324 formed in the first bottom plate 381, the second bottom plate 213 is provided above the lower cross member 281 of the operating mechanism box 2, and the second wire passing hole 212 is formed in the second bottom plate 213.

In the present embodiment, as shown in fig. 5 and fig. 6, the first left vertical plate 171 and the first right vertical plate 172 are parallel to each other and both serve as the first component of the cable box 1, the lateral surrounding edge 18 serves as the second component of the cable box 1 and can be regarded as a horizontal plate, and the upper ends 1711, 1721 of the two first

vertical plates

171, 172 are located above the lateral surrounding edge 18 in the vertical direction, that is, the two first components are offset to the operating mechanism box 2 in the vertical direction than the second component. The second left riser 271 and the second right riser 272 are parallel to each other and both serve as a third component of the operating mechanism box 2, the lower cross member 281 and the upper cross member 282 (see fig. 7) both serve as a fourth component of the operating mechanism box 2, the bottom of the lower cross member 281 is vertically lower than the lower ends 2711, 2721 of the two

second risers

271, 272, that is, the fourth component is vertically deviated from the third component to the cable box 1, see fig. 7 and 8, the top of the upper cross member 282 is vertically higher than the upper ends 2712, 2722 of the two

second risers

271, 272, that is, the fourth component is vertically deviated from the third component to the instrument box 3. The third left riser 371 and the third right riser 372 are parallel to each other and are all used as a fifth component of the instrument box 3, the instrument box surrounding edge 382 and the first bottom plate 381 together form a transverse plate connected between the third left riser 371 and the third right riser 372, and also form a sixth component of the instrument box 3 together, the lower ends 3712 and 3722 of the two

third risers

371 and 372 are lower than the transverse plate, namely the fifth component is deviated from the operating mechanism box 2 than the sixth component in the vertical direction.

Referring to fig. 11, 12 and 13, the upper ends 1711, 1721 of the respective two

first risers

171, 172 and the lateral periphery 18 are aligned with each other, i.e. the first and second components of the cable box 1 are aligned with each other. The bottom of the lower cross member 281 and the lower ends 2711, 2721 of the two

second risers

271, 272 are aligned with each other, as shown in fig. 14 and 15, and the top of the upper cross member 282 of the operator box 2 and the upper ends 2712, 2722 of the two

second risers

271, 272 are aligned with each other, i.e., the third and fourth components of the operator box 2 are aligned with each other. The lower ends 3712, 3722 of the two

third risers

371, 372 of the instrument box 3 and the first bottom plate 381 are aligned with each other, i.e., the fifth and sixth components of the instrument box 3 are aligned with each other. Referring to fig. 12 and 13, the ring main unit of the present embodiment also uses the first door panel 15 (see fig. 3) of the cable box 1 to block the first gap 41 at the butt joint portion between the cable box 1 and the operating mechanism box 2, see fig. 14 and 15, and uses the third door panel 35 (see fig. 3) of the instrument box 3 to block the second gap 42 at the butt joint portion between the instrument box 3 and the operating mechanism box 2, which is not described in detail.

The above description is only the embodiments of the present invention, and the scope of protection is not limited thereto. The insubstantial changes or substitutions will now be made by those skilled in the art based on the teachings of the present invention, which fall within the scope of the claims.

Claims

1. The ring main unit comprises a first box body and a second box body which are butted, and a gap which leads to the interior of the box bodies is exposed at the butted part of the first box body and the second box body; the first box body is provided with a door plate; the method is characterized in that: the door panel shields the gap.

2. The ring main unit as claimed in claim 1, wherein: the whole or part of the gap is positioned at a first butt joint part of the first box body, which is in butt joint with the second box body, and the door plate shields the first butt joint part of the first box body; and/or the whole or part of the gap is positioned at a second butt joint part of the second box body, which is butted with the first box body, and the door plate extends to the side of the first box body to shield the second butt joint part of the second box body.

3. The ring main unit as claimed in claim 2, wherein: the first butt joint part is provided with a first assembly and a second assembly which are connected together, the whole or part of the gap is positioned at the first joint part of the second assembly, which is connected with the first assembly, and the door panel shields the first joint part of the second assembly; and/or the second butt joint part is provided with a third component and a fourth component which are connected together, the whole or part of the gap is positioned at a second connecting part of the fourth component, which is connected with the third component, and the door plate extends to the side of the first box body to shield the second connecting part of the fourth component.

4. The ring main unit as claimed in claim 3, wherein: the first and second components are aligned with each other; and/or the third and fourth components are aligned with each other.

5. The ring main unit as claimed in claim 3, wherein: in the opposite direction of the first box body and the second box body, the position of the first assembly is deviated to the second box body compared with the second assembly; and/or the fourth component is positioned to be offset from the third component towards the first housing in a direction opposite the first and second housings.

6. The ring main unit as claimed in claim 5, wherein: the first box body is positioned below or above the second box body, or the number of the first box bodies is two, and the first box bodies are respectively positioned below and above the second box body.

7. The ring main unit as claimed in claim 6, wherein: the first assembly is a first vertical plate, the first assembly is provided with two parallel first transverse plates, the second assembly is a first transverse plate connected between the two first vertical plates, and the two first vertical plates are deviated to the second box body in the vertical direction than the first transverse plates; and/or the third subassembly is the second riser, and the third subassembly has two of parallel, and the fourth subassembly is the second diaphragm of connecting between two second risers, and the second diaphragm is than two second risers deviation first box in the vertical direction.

8. The ring main unit as claimed in claim 1, wherein: the first box body is positioned below or above the second box body, or the number of the first box bodies is two, and the first box bodies are respectively positioned below and above the second box body.

9. The ring main unit as claimed in claim 1, wherein: the second box body is an operating mechanism box; the first box body is a cable box positioned below the operating mechanism box, or the first box body is an instrument box positioned above the operating mechanism box, or the first box body is provided with two first box bodies, wherein one first box body is the cable box positioned below the operating mechanism box, and the other first box body is the instrument box positioned above the operating mechanism box.