Ring main unit

Abstract

The ring network cabinet of the present invention comprises a first box body and a second box body connected to each other, a gap leading to the inside of the box body is exposed at the joint position between the first box body and the second box body; the first box body is provided with a door panel; the door panel shields the gap. The door panel shields the gap at the joint position of the two boxes, so that the gap will not be directly exposed to the outside, and the ring network cabinet has higher safety.

Description

Technical Field

[0001] The invention relates to electrical equipment, in particular to a ring network cabinet. Background Art

[0002] Ring main unit refers to an electrical device that installs high-voltage switchgear inside a metal cabinet or a non-metal cabinet. It is generally composed of multiple boxes with different functions installed together, including gas boxes, instrument boxes, mechanism boxes, and cable boxes. The joints of two adjacent boxes may have gaps exposed to the inside of the box due to process defects or installation errors, which will bring safety hazards and low safety. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a ring network cabinet with high safety.

[0004] To solve the above technical problems, the ring main unit of the present invention comprises a first box body and a second box body connected to each other, wherein a gap leading to the inside of the box body is exposed at the joint between the first box body and the second box body; the first box body is provided with a door panel; and the door panel blocks the gap.

[0005] Furthermore, all or part of the gap is located at the first docking portion of the first box body that docks with the second box body, and the door panel covers the first docking portion of the first box body; and / or all or part of the gap is located at the second docking portion of the second box body that docks with the first box body, and the door panel extends to the side of the first box body to cover the second docking portion of the second box body.

[0006] Furthermore, the first docking portion is provided with a first component and a second component connected together, all or part of the gap is located at the first connection portion of the second component connected to the first component, and the door panel covers the first connection portion of the second component; and / or the second docking portion is provided with a third component and a fourth component connected together, all or part of the gap is located at the second connection portion of the fourth component connected to the third component, and the door panel extends to the side of the first box body to cover the second connection portion of the fourth component.

[0007] Furthermore, the first component and the second component are aligned with each other; and / or the third component and the fourth component are aligned with each other.

[0008] Furthermore, in the relative direction between the first box and the second box, the first component is located closer to the second box than the second component; and / or in the relative direction between the first box and the second box, the fourth component is located closer to the first box than the third component.

[0009] Furthermore, the first box is located below or above the second box, or there are two first boxes, which are located below and above the second box respectively.

[0010] Furthermore, the first component is a first vertical plate, the first component has two parallel plates, the second component is a first horizontal plate connected between the two first vertical plates, and the two first vertical plates are vertically biased toward the second box body more than the first horizontal plate; and / or the third component is a second vertical plate, the third component has two parallel plates, the fourth component is a second horizontal plate connected between the two second vertical plates, and the second horizontal plate is vertically biased toward the first box body more than the two second vertical plates.

[0011] Furthermore, the first box is located below or above the second box, or there are two first boxes, which are located below and above the second box respectively.

[0012] Furthermore, the second box body is an operating mechanism box; the first box body is a cable box located below the operating mechanism box, or the first box body is an instrument box located above the operating mechanism box, or there are two first boxes, one of which is a cable box located below the operating mechanism box, and the other is an instrument box located above the operating mechanism box.

[0013] The door panel covers the gap between the two boxes so that the gap will not be directly exposed to the outside, and the ring network cabinet has higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the axonometric drawing of the ring main unit.

[0015] Figure 2 This is the first exploded view of the ring main unit. The perspective in the view is looking at the ring main unit from diagonally above the ring main unit.

[0016] Figure 3 This is the second exploded view of the ring main unit. The perspective in the figure is looking at the ring main unit from the oblique bottom.

[0017] Figure 4 This is the main view of the ring main unit, in which the first and third door panels are removed.

[0018] Figure 5 yes Figure 4 A partial enlarged picture of Figure 4 The A part.

[0019] Figure 6 yes Figure 4 A partial enlarged picture of Figure 4 Part B.

[0020] Figure 7 yes Figure 4 A partial enlarged picture of Figure 4 The C part.

[0021] Figure 8 yes Figure 4A partial enlarged picture of Figure 4 The D part.

[0022] Fig. 9 yes Figure 4 A partial enlarged picture of Figure 4 In the A portion, the first door panel covers the first gap in the figure.

[0023] Fig.10 yes Figure 4 A partial enlarged picture of Figure 4 In the C position, the third door panel in the figure blocks the second gap.

[0024] Fig.11 It is a front view of the second embodiment of the present invention, in which the first door panel and the third door panel are removed.

[0025] Fig.12 yes Fig.11 A partial enlarged picture of Fig.11 The H part.

[0026] Fig.13 yes Fig.11 A partial enlarged picture of Fig.11 The I part.

[0027] Fig.14 yes Fig.11 A partial enlarged picture of Fig.11 The J part.

[0028] Fig.15 yes Fig.11 A partial enlarged picture of Fig.11 The K part. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with specific implementation methods.

[0030] See Figure 1 ,by Figure 1 The direction indicated by arrow F is the front, and 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 a gas box 9 located behind the operating mechanism box 2. Figure 2The front part 101 of the cable box 1 is provided with a cable accommodating chamber 102 to accommodate the cables of the ring network cabinet, and the rear part 103 is provided with a pressure relief chamber 104. The upper cavity opening 1041 of the pressure relief chamber 104 is connected to the gas box 9 for pressure relief of the gas box 9. The gas box 9 is provided with an isolating switch (not shown in the figure) and a grounding switch (not shown in the figure). The operating mechanism box 2 is provided with an isolating switch operating mechanism 28 and a grounding switch operating mechanism 29. The operator controls the isolating switch through the isolating switch operating mechanism 28 to energize or de-energize the primary cable (not shown in the figure) of the ring network cabinet, and controls the grounding switch through the grounding switch operating mechanism 29 to ground or unground the ring network cabinet. The gas box 9 is filled with SF6 gas, which has good electrical insulation and arc extinguishing performance, and can protect the isolating switch and grounding switch in the gas box 9. The instrument box 3 is provided with a variety of indicator lights 31 to display the working status of the ring network cabinet.

[0031] See Figure 2 and Figure 3 The top 11 of the front part 101 of the cable box 1 is connected to 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. Some cables in the operating mechanism box 2 can be inserted into the cable box 1 through the second threading hole 212 and the first threading hole 111 in sequence. The top 22 of the operating mechanism box 2 is connected 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. Some cables in the instrument box 3 can be inserted into the operating mechanism box 2 through the fourth threading hole 324 and the third threading hole 223 in sequence. The cable box 1 comprises a first frame 10, a cable accommodating chamber 102 and a pressure relief chamber 104 are arranged on the first frame 10, and a first door plate 15 is covered at the front cavity opening 1021 of the cable accommodating chamber 102. The operating mechanism box 2 comprises a second frame 20, the second frame 20 surrounds an operating mechanism accommodating chamber 202, the isolating switch operating mechanism 28 and the grounding switch operating mechanism 29 are located in the operating mechanism accommodating chamber 202, and a second door plate 25 is covered at the front cavity opening 2021 of the operating mechanism accommodating chamber 202. The instrument box 3 comprises a third frame 30, the third frame 30 surrounds a low-voltage component accommodating chamber 302, low-voltage components (not shown in the figure) are arranged in the low-voltage component accommodating chamber 302, and a third door plate 35 is covered at the front cavity opening 3021 of the low-voltage component accommodating chamber 302.

[0032] Most of the existing ring main units, see Figure 2 , any of the first frame 10, the second frame 20 and the third frame 30 is connected together by a plurality of metal parts, and these metal parts are formed by bending sheet metal parts, and the sheet metal parts will have bending angles after bending, and some bending angles are located at the butt joints of the two boxes, for example, see Fig.11The two bending angles 1814 and 2814 in the figure are both located on the front surface of the joint portion between the cable box 1 and the operating mechanism box 2, so the front surface of the joint portion between the cable box 1 and the operating mechanism box 2 is exposed with a first gap 41. Figure 2 The top 11 of the front portion 101 of the cable box 1 is not provided with a top plate, that is, the first gap 41 (see Fig.11 ) through the first threading hole 111 to the inside of the cable box 1, and also through the second threading hole 212 (see Figure 3 ) leads to the inside of the operating mechanism box 2, so there is a safety hazard in the ring main unit. Figure 5 and Fig. 9 The ring main unit utilizes the first door panel 15 of the cable box 1 to cover the first gap 41 at the joint between the cable box 1 and the operating mechanism box 2. Figure 7 and Fig.10 The third door panel 35 of the instrument box 3 is used to cover the second gap 42 at the joint between the instrument box 3 and the operating mechanism box 2, so that these gaps 41 and 42 will not be exposed, and the safety is higher.

[0033] by Figure 1 The arrow G in the middle points to the left. Figure 4 , Figure 5 and Figure 6The first frame 10 of the cable box 1 includes a first left vertical plate 171 and a first right vertical plate 172. The right side of the first left vertical plate 171 is connected to a left vertical side 173 by bolts, and the left side of the first right vertical plate 172 is connected to a right vertical side 174 by bolts. A transverse side 18 is provided on the top of the first frame 10, and the left and right ends 181 and 182 of the transverse side 18 are respectively mounted above the left vertical side 173 and the right vertical side 174. The upper ends 1711 and 1721 of the first left vertical plate 171 and the first right vertical plate 172 are higher than the transverse side 18. The second frame 20 of the operating mechanism box 2 includes a second left vertical plate 271 and a second right vertical plate 272. A lower crossbeam 281 is provided at the bottom of the second frame 20. The left and right ends 2811 and 2812 of the lower crossbeam 281 are respectively connected to the lower end of the second left vertical plate 271 and the lower ends 2711 and 2721 of the second right vertical plate 272 by bolts. The bottom of the lower crossbeam 281 is lower than the lower ends 2711 and 2721 of the two second vertical plates 271 and 272 in the vertical direction. When the installer connects the cable box 1 and the operating mechanism box 2 together, he first places the operating mechanism box 2 on the cable box 1. In this state, the second left vertical plate 271 connects with the first left vertical plate 171, the second right vertical plate 272 connects with the first right vertical plate 172, and the lower cross beam 281 connects with the transverse surrounding edge 18. Then the operator successively uses bolts to connect the second left vertical plate 271 and the first left vertical plate 171 together, the second right vertical plate 272 and the first right vertical plate 172 together, and the lower cross beam 281 and the transverse surrounding edge 18 together, thereby completing the connection between the front parts of the cable box 1 and the operating mechanism box 2.

[0034] See Figure 5 and Figure 6 There are first gaps 41 at the left front and right front of the joint between the cable box 1 and the operating mechanism box 2, and one of the two first gaps 41 is located on the left and the other on the right. Figure 3 ) respectively shields the two first gaps 41. Figure 3 ) blocks the first gap 41 on the left, see Figure 5 and Fig. 9The left end 2813 of the bottom of the lower crossbeam 281 of the operating mechanism box 2 has a bending angle 2814, and the left end 181 of the horizontal edge 18 of the cable box 1 also has a bending angle 1814, so that the left front part of the docking position of the cable box 1 and the operating mechanism box 2 is exposed with a first gap 41, and the upper part of the first gap 41 is located at the left end 2813 of the bottom of the lower crossbeam 281, and the lower part is located at the left end 181 of the horizontal edge 18. The first door panel 15 not only blocks the left end 181 of the horizontal edge 18 and thus blocks the lower part of the first gap 41, but also extends upward to the top of the first frame 10 of the cable box 1 to block the left end 2813 of the bottom of the lower crossbeam 281 and thus blocks the upper part of the first gap 41. The left front part and the right front part of the docking position of the cable box 1 and the operating mechanism box 2 are symmetrical. The right part of the first door panel 15 blocks the first gap 41 on the right, which will not be described in detail in this embodiment.

[0035] See Figure 2 The second frame 20 has no top plate, and an upper crossbeam 282 is provided on the top of the second frame 20. Figure 7 and Figure 8 The left and right ends 2821, 2822 of the upper crossbeam 282 are connected to the upper end 2712 of the second left vertical plate 271 and the upper end 2722 of the second right vertical plate 272 by bolts, respectively. The top of the upper crossbeam 282 is higher than the upper ends 2712, 2722 of the two second vertical plates 271, 272 in the vertical direction. The third frame 30 includes a third left vertical plate 371 and a third right vertical plate 372. A first bottom plate 381 is provided between the bottoms of the third left vertical plate 371 and the third right vertical plate 372. The lower ends 3712, 3722 of the third left vertical plate 371 and the third right vertical plate 372 are lower than the first bottom plate 381. An instrument box surround 382 is provided above the first bottom plate 381. The left and right ends 3821, 3822 of the instrument box surround 382 are respectively fixedly connected to the third left vertical plate 371 and the third right vertical plate 372 by bolts. When the installer connects the instrument box 3 and the operating mechanism box 2 together, he first places the instrument box 3 above the operating mechanism box 2. In this state, the third left vertical plate 371 connects with the second left vertical plate 271, the third right vertical plate 372 connects with the second right vertical plate 272, and the first bottom plate 381 connects with the upper crossbeam 282. Then the operator successively uses bolts to connect the third left vertical plate 371 and the second left vertical plate 271 together, connect the third right vertical plate 372 and the second right vertical plate 272 together, and connect the instrument box edge 382, ​​the first bottom plate 381 and the upper crossbeam 282 together, thereby completing the connection between the front parts of the instrument box 3 and the operating mechanism box 2.

[0036] See Figure 7 and Figure 8 The left front and right front parts of the joints between the operating mechanism box 2 and the instrument box 3 are both exposed with second gaps 42, one of the two second gaps 42 is on the left and the other is on the right. Figure 3 ) respectively shields the two second gaps 42. Figure 3 ) blocks the second gap 42 on the left, see Figure 7 and Fig.10 The left end 2823 of the top of the upper crossbeam 282 has a bending angle 2824, so that a small gap 422 is exposed at the lower left part of the docking part between the instrument box 3 and the operating mechanism box 2. The left end 3823 of the bottom of the instrument box surround 382 also has a bending angle 3824, so that a small gap 421 is exposed at the upper left part of the docking part between the instrument box 3 and the operating mechanism box 2. These two small gaps 421 and 422 are collectively referred to as the second gap 42. The third door panel 35 not only blocks the left end 3823 of the bottom of the instrument box surround 382, ​​thereby blocking the small gap 421, but also extends downward to the top of the third frame 30 of the instrument box 3 to block the left end 2823 of the top of the upper crossbeam 282, thereby blocking the small gap 422. The left front and right front parts of the joint between the operating mechanism box 2 and the instrument box 3 are symmetrical. The right part of the third door panel 35 blocks the second gap 42 on the right, which is not described in detail in this embodiment.

[0037] See Figure 3 A fourth threading hole 324 is formed on the first bottom plate 381 of the instrument box 3 , a second bottom plate 213 is mounted above the lower cross beam 281 of the operating mechanism box 2 , and a second threading hole 212 is formed on the second bottom plate 213 .

[0038] This embodiment sees Figure 5 and Figure 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 horizontal side 18 serves as the second component of the cable box 1 and can be regarded as a horizontal plate. The upper ends 1711 and 1721 of the two first vertical plates 171 and 172 are higher than the horizontal side 18 in the vertical direction, that is, the two first components are more inclined to the operating mechanism box 2 in the vertical direction than the second components. The second left vertical plate 271 and the second right vertical plate 272 are parallel to each other and both serve as the third component of the operating mechanism box 2. The lower crossbeam 281 and the upper crossbeam 282 (see Figure 7 ) are used as the fourth component of the operating mechanism box 2. The bottom of the lower cross beam 281 is lower than the lower ends 2711 and 2721 of the two second vertical plates 271 and 272 in the vertical direction. That is, the fourth component is closer to the cable box 1 than the third component in the vertical direction. Figure 7 and Figure 8The top of the upper crossbeam 282 is vertically higher than the upper ends 2712 and 2722 of the two second vertical plates 271 and 272, that is, the fourth component is vertically biased toward the instrument box 3 more than the third component. The third left vertical plate 371 and the third right vertical plate 372 are parallel to each other and both serve as the fifth component of the instrument box 3. The instrument box perimeter 382 and the first bottom plate 381 together form a cross plate connected between the third left vertical plate 371 and the third right vertical plate 372, and also together form the sixth component of the instrument box 3. The lower ends 3712 and 3722 of the two third vertical plates 371 and 372 are lower than the cross plate, that is, the fifth component is vertically biased toward the operating mechanism box 2 more than the sixth component.

[0039] The second embodiment of the present invention is shown in Fig.11 , Fig.12 and Fig.13 The upper ends 1711 and 1721 of the two first vertical plates 171 and 172 are aligned with the horizontal edge 18, that is, the first component and the second component of the cable box 1 are aligned with each other. The bottom of the lower crossbeam 281 and the lower ends 2711 and 2721 of the two second vertical plates 271 and 272 are aligned with each other. Fig.14 and Fig.15 The top of the upper crossbeam 282 of the operating mechanism box 2 and the upper ends 2712 and 2722 of the two second vertical plates 271 and 272 are aligned with each other, that is, the third component and the fourth component of the operating mechanism box 2 are aligned with each other. The lower ends 3712 and 3722 of the two third vertical plates 371 and 372 of the instrument box 3 and the first bottom plate 381 are aligned with each other, that is, the fifth component and the sixth component of the instrument box 3 are aligned with each other. Fig.12 13, the ring main unit of this embodiment also utilizes the first door panel 15 of the cable box 1 (see Figure 3 ) to cover the first gap 41 at the joint between the cable box 1 and the operating mechanism box 2, see Fig.14 and Fig.15 The third door panel 35 (see FIG. 3 ) of the instrument box 3 is used to shield the second gap 42 at the joint between the instrument box 3 and the operating mechanism box 2 , which will not be described in detail.

[0040] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A ring main unit, comprising a first box body and a second box body connected to each other, wherein a gap leading to the inside of the box body is exposed at the joint between the first box body and the second box body; the first box body is provided with a door panel; characterized in that: The door panel blocks the gap; all or part of the gap is located at the first docking portion of the first box body that docks with the second box body, and the door panel blocks the first docking portion of the first box body; and / or all or part of the gap is located at the second docking portion of the second box body that docks with the first box body, and the door panel extends to the side of the first box body to block the second docking portion of the second box body; the first docking portion is provided with a first component and a second component connected together, and all or part of the gap is located at the first connecting portion of the second component connected to the first component, and the door panel blocks the first connecting portion of the second component; and / or the second docking portion is provided with a third component and a fourth component connected together, and all or part of the gap is located at the fourth component connected to the third component At the second connection part of the first box, the door panel extends to the side of the first box to block the second connection part of the fourth component; the first component is a first vertical plate, the first component has two parallel pieces, the second component is a first horizontal plate connected between the two first vertical plates, and the two first vertical plates are vertically biased toward the second box than the first horizontal plate; and / or the third component is a second vertical plate, the third component has two parallel pieces, the fourth component is a second horizontal plate connected between the two second vertical plates, and the second horizontal plate is vertically biased toward the first box than the two second vertical plates; the first box is located below or above the second box, or there are two first boxes, which are respectively located below and above the second box; the first component and the second component are aligned with each other; and / or the third component and the fourth component are aligned with each other.

2. The ring main unit according to claim 1, characterized in that: In the relative direction between the first box and the second box, the first component is located closer to the second box than the second component; and / or in the relative direction between the first box and the second box, the fourth component is located closer to the first box than the third component.

3. The ring main unit according to claim 2, characterized in that: The first box is located below or above the second box, or there are two first boxes, which are located below and above the second box respectively.

4. The ring main unit according to claim 1, characterized in that: The second box is the operating mechanism box; the first box is a cable box located below the operating mechanism box, or the first box is an instrument box located above the operating mechanism box, or there are two first boxes, one of which is a cable box located below the operating mechanism box and the other is an instrument box located above the operating mechanism box.

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