CN220122467U - Air insulation metering cabinet and switch cabinet combining structure - Google Patents

Abstract

The utility model provides an air insulation metering cabinet and a switch cabinet combining cabinet structure, wherein the air insulation metering cabinet comprises a first cabinet body (11), the air insulation metering cabinet further comprises an electrical structure corresponding to each phase, and the electrical structure comprises: the first sleeve (21) penetrates through the top plate of the first cabinet body (11); the bus assembly (3) is located on the outer side of the top plate of the first cabinet body (11), the first end of the bus assembly (3) is connected to the first sleeve (21) and extends out of one end of the cabinet body, the second end of the bus assembly (3) is used for being connected with the second sleeve (22) on the first air box (12) of the second cabinet body, and the second sleeve (22) extends out of the top of the first air box (12).

Description

Air insulation metering cabinet and switch cabinet combining structure

Technical Field

The utility model relates to the field of switch cabinets, in particular to an air insulation metering cabinet and a cabinet combining structure of the switch cabinet.

Background

The metering cabinet is a cabinet body provided with a special metering device. The metering cabinet is often used together with a gas-insulated switchgear (GIS).

In the prior art, the metering cabinet is generally provided with an air box, and when the metering cabinet is used together with the gas-insulated switchgear, a sleeve on a first air box of the gas-insulated switchgear extends out of a side plate of the first air box and is connected with a sleeve in the metering cabinet, which extends out of the side plate of the first air box. But such a combination is costly.

Disclosure of Invention

In view of this, the present utility model proposes an air-insulated metering cabinet comprising a first cabinet body, said air-insulated metering cabinet further comprising an electrical structure corresponding to each phase, said electrical structure comprising:

the first sleeve penetrates through the top plate of the first cabinet body;

the bus assembly is positioned on the outer side of the top plate of the first cabinet body, the first end of the bus assembly is connected with one end of the first sleeve pipe extending out of the cabinet body, the second end of the bus assembly is used for being connected with a second sleeve pipe on the first air box of the second cabinet body, and the second sleeve pipe extends out of the top of the first air box.

By adopting the air insulation metering cabinet, the top of the air insulation metering cabinet is provided with the sleeve and the bus assembly, so that the air insulation metering cabinet can be connected with the second sleeve extending out of the top of the first air box of the other cabinet body to complete the cabinet splicing, the air box of the air insulation metering cabinet is omitted, and the cost is saved.

According to the air-insulated metering cabinet described above, optionally, the electrical structure further comprises at least one of the following:

the current transformer is fixed in the first cabinet body and is electrically connected with one end of the first sleeve, which is positioned in the first cabinet body;

the voltage transformer is fixed in the first cabinet body and is electrically connected with the current transformer.

The air insulation metering cabinet is provided with enough space for placing the voltage transformer and/or the current transformer, and is convenient to install.

According to the air-insulated metering cabinet described above, optionally, the voltage transformer is electrically connected with the current transformer through a fuse. The connection mode meets the requirements of clients who need to be connected in the mode, and the market of the clients is expanded.

According to the air insulation metering cabinet described above, optionally, the current transformer has a first terminal and a second terminal, the first terminal is located below the second terminal, the second terminal is connected to the first sleeve through a first set of conductive bars, and the second terminal is electrically connected to the voltage transformer.

According to the air insulation metering cabinet, optionally, the second wiring terminal is connected with the voltage transformer through a second group of conductive bars, a first insulation plate is fixed below the first wiring terminal, and the fuse is fixed on the first insulation plate and connected with the second group of conductive bars. The first insulating plate is present such that the voltage transformer is not electrically connected to the first terminal. In addition, the first insulating plate also plays a supporting role.

According to the air-insulated metering cabinet described above, optionally, the air-insulated metering cabinet further comprises another one of the electrical structures, wherein the second end of the bus bar assembly of the other one of the electrical structures is used for connecting a fourth sleeve on a second air box of a third cabinet body, the fourth sleeve extends out from the top of the second air box, and the first terminal is connected to the third sleeve of the other one of the electrical structures through a third group of conductive bars.

According to the air insulation metering cabinet as described above, optionally, the number of the electrical structures is 3, and 3 of the bus bar assemblies are sequentially arranged in the first direction D1, and a space between the bus bar assembly located at the side and the second end of the bus bar assembly located in the middle in the first direction D1 is larger than a space between the bus bar assembly and the first end of the bus bar assembly located in the middle.

According to the air insulated metering cabinet described above, optionally, the bus bar assembly comprises:

the extension bus connector is used for connecting one end of the sleeve extending out of the cabinet body;

the bus body is provided with bending parts on two sides in the first direction D1;

a first busbar mounting section located at a first end of the busbar body, the first busbar mounting section having a waist hole;

and the second bus bar installation section is positioned at the second end of the bus bar body and is provided with a half hole.

Through adopting the busbar of buckling to connect two first cabinets body, the kink of generating line body can make its and adjacent generating line between the interval enough big, and then satisfies the requirement of insulating distance to satisfy the demand of combining between air insulation metering cabinet and the gas-insulated switchgear. In addition, the existence of the waist hole and the half hole enables the bending bus to adapt to different process errors, and in addition, the bending bus can be prevented from rotating.

According to the air insulation metering cabinet, optionally, the angle of the bending part is 150-170 degrees; and/or

The bending part is positioned above the top plate of the first cabinet body.

The utility model also comprises a switch cabinet combining structure which comprises the air insulation metering cabinet and a gas insulation switch cabinet positioned at one side of the air insulation metering cabinet, wherein the gas insulation switch cabinet is provided with the first gas tank.

Drawings

The above and other features and advantages of the present utility model will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

fig. 1 is a schematic diagram of a combination of an air-insulated metering cabinet and a gas-insulated switchgear cabinet according to an embodiment of the present utility model.

Fig. 2 is a top view of the combination sideboard structure of fig. 1.

Fig. 3 is a partial schematic view of the internal structure of the air insulated metering cabinet.

Fig. 4 is a schematic cross-sectional view of a bent busbar.

Fig. 5 is a schematic structural view of a second bus bar mounting section of the bus bar assembly.

Fig. 6 is a schematic structural view of the fixing member penetrating through the expansion bus connector.

Fig. 7 is a schematic perspective view of a bent bus bar.

Wherein, the reference numerals are as follows:

cabinet body of 11-air insulation metering cabinet

12-first air box

13-second air box

21-first sleeve

22-second sleeve

23-third sleeve

24-fourth sleeve

3-busbar assembly

31-expansion bus connector

311-insulating shell

312-conductor

32-busbar body

321-bending part

33-first bus bar mounting section

331-waist hole

34-second bus bar mounting section

341-half hole

4-current transformer

41-first terminal

42-second terminal

5-voltage transformer

6-fuse

71-first group of conductor bars

72-second group of conductive bars

73-third group of conductive bars

74-first insulating plate

75-second insulating plate

8-fastener

9-block

D1-first direction

Detailed Description

The present utility model will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Nouns and pronouns for humans in this patent application are not limited to a particular gender.

The utility model provides an air insulation metering cabinet. As shown in fig. 1, the air insulated metering cabinet includes a first cabinet body 11 and an electrical structure. The electrical structure here corresponds to each phase of the air insulated metering cabinet. In fig. 1 to 3, 3 phases are shown, correspondingly, 3 electrical structures are also present, which 3 electrical structures are arranged side by side along the first direction D1. It should be noted that, of the 3 electrical structures, two electrical structures located at the side are identical, and the electrical structure located in the middle is different from the other two electrical structures, and is mainly specifically that the electrical structure located at the side has a bent bus, and the electrical structure located in the middle has a linear bus, as shown in fig. 2 and 6, and the electrical structure in the middle is a linear bus. The air insulated metering cabinet indicates that the metering cabinet does not have an air box.

The electrical structure comprises a first bushing 21 and a busbar assembly 3. The first sleeve 21 is arranged on the top plate of the first cabinet body 11 in a penetrating manner, the bus bar assembly 3 is arranged on the outer side of the top plate of the first cabinet body 11, the first end of the bus bar assembly 3 is connected to one end of the first sleeve 21 extending out of the first cabinet body 11, the second end of the bus bar assembly 3 is used for being connected with the second sleeve 22 on the first air box 12 of a second cabinet body, and the second sleeve 22 extends out of the top of the first air box 12. Specifically, the second sleeve 22 is connected to the busbar assembly 3 by an expansion busbar connector having the same structure as the expansion busbar connector 31 described later.

The first sleeve 21 may have an outer shape as shown in fig. 3, and a part thereof located inside the first container 11 has an umbrella skirt, and a part thereof located inside the first container 11 is a cone-shaped body, an outer surface of which is smooth. That is, the first sleeve 21 may be a Type-C sleeve.

The busbar assembly 3 is used to make an electrical connection between the two cabinets. As an exemplary illustration, the bus bar assembly 3 includes an expansion bus bar connector 31, a bus bar body 32, a first bus bar mounting segment 33, and a second bus bar mounting segment 34. The bus bar body 32 is typically a copper bar with one end connected to the electrical conductor 312. The busbar body 32, the first busbar mounting section 33 and the second busbar mounting section 34 may be integrally formed, and such a structure is convenient for processing and for mounting.

Taking the electrical structure at the side as an example for explanation, the electrical structure at the middle is only that the bus body has no bending part, is a linear bus body, and the rest structures can be the same.

As shown in fig. 4 and 7, the busbar body 32, the first busbar mounting section 33, and the second busbar mounting section 34 may be referred to as a bent busbar. The bent bus bar can comprise a conductive rod and an insulating layer positioned outside the conductive rod, wherein the conductive rod of the conductive layer can be made of copper, the conductive property of the conductive rod is good, and the insulating layer can be made of silicon rubber. The expansion bus connector 31 is used for connecting one end of the first sleeve 21 extending out of the first cabinet 11; the bus bar body 32 has a bent portion 321; the first busbar mounting section 33 is located at a first end of the busbar body 32, and the first busbar mounting section 33 has a waist hole 331; the second bus bar mounting section 34 is located at a second end of the bus bar body 32, the second bus bar mounting section 34 having a half hole 341. For example, the expansion bus connector 31 has an insulating housing 311 and a conductor 312, the insulating housing 311 is tubular, and the conductor 312 is located inside the insulating housing 311.

The bus bar body 32 has a bending portion 321. As an exemplary illustration, the angle of the bend 321 of the present utility model is 150 ° -170 °, as shown in fig. 4 and 6, which facilitates processing. The bus bar body 32 has a cylindrical shape, and its interface is circular.

As an exemplary illustration, as shown in fig. 2, the first bus bar mounting segment 33 is configured to connect to the first expansion bus bar connector 31 on the first cabinet 11, the fixing member 8 can pass through the waist hole 331 and the first expansion bus bar connector 31, and the fixing member 8 is fixedly connected to the first sleeve 21 on the top of the first cabinet 11. The fixing member 8 may be a screw rod, which is fixed to the conductor in the first bushing 21, so that the first busbar mounting section 33, the first extension busbar connector 31 and the first bushing 21 can be fixed together, and the mounting manner is simple and convenient. The existence of the waist hole 331 can tolerate a certain process error, so that the suitability of the bending bus is higher, and the existence of the waist hole 331 can prevent the bending bus from rotating. Optionally, the first busbar mounting section 33 also includes a conductive rod, such as a copper rod, and an insulating layer outside the conductive rod, the diameter of the first busbar mounting section 33 being smaller than the diameter of the busbar body 32. In this way, the first bus bar mounting section 33 is facilitated to extend into the first extension bus bar connector 31 for connection.

As an exemplary illustration, as shown in fig. 1, 2 and 6, the second bus bar mounting segment 34 is used to connect the second expansion bus bar connector 31 on the second cabinet, the fixing member 8 can pass through the half hole 341 and the second expansion bus bar connector 31, and the fixing member 8 is fixedly connected to the second sleeve 22 on the top of the second cabinet, so that the mounting manner is simple and convenient. The presence of the half hole 341 makes the length of the second busbar mounting section 34 longer, and thus the contact area thereof with the second extension busbar connector 31 larger, which can reduce the contact resistance and thus the generation of heat. In addition, the presence of the half hole 341 also prevents rotation of the bent bus bar. Optionally, the second bus bar mounting section 34 also includes a conductive rod, such as a copper rod, and an insulating layer outside the conductive rod, the second bus bar mounting section 34 having a diameter smaller than the diameter of the bus bar body 32.

As an exemplary illustration, the conductive bars of the bent bus bar may be integrally formed, and the insulating layer on the outer side thereof may be integrally formed.

Fig. 1, 2 and 4 to 6 show the case where the first busbar installation section 33 is located on the first cabinet body 11 of the air-insulated metering cabinet, and may also be located on the second cabinet body 11 of the air-insulated switchgear cabinet, which may be specifically set according to actual needs. The first busbar mounting section 33 is located on the air-insulated metering cabinet, i.e. above the top plate of the first cabinet body 11, and can avoid the bent portion 321 blocking other components on the first cabinet body 11 of the air-insulated switchgear, such as a low-voltage chamber. As can be seen from fig. 3, the length of the gas-insulated switchgear cabinet in the first direction D1 (depth direction) is smaller than the length of the air-insulated cabinet in the first direction D1.

As shown in fig. 2, the number of the electrical structures of the present utility model is 3, 3 busbar assemblies 3 are sequentially arranged in the first direction D1, and the interval L1 between the 2 waist holes 331 located on two sides in the first direction D1 is greater than the interval L2 between the half holes 341, and a linear busbar body is further disposed between the two electrical structures. The two ends of the linear bus body are also provided with a first bus installation section 33 and a second bus installation section 34, and are also connected with an expansion bus connector 31, which is not described in detail. In this way, the insulation distance between each phase of the air insulation metering cabinet can be met, and the occupied area of the air insulation metering cabinet is not increased.

By adopting the air insulation metering cabinet, the top of the air insulation metering cabinet is provided with the sleeve and the bus assembly 3, so that the air insulation metering cabinet can be connected with the second sleeve 22 extending out of the top of the first air box 12 of another cabinet body, the air box of the air insulation metering cabinet is omitted, and the cost is saved.

In addition, through adopting the bending bus to connect two first cabinets 11, the kink 321 of bus body 32 can make its and adjacent bus between the interval enough big, and then satisfies the requirement of insulating distance to satisfy the demand of combining between air insulation metering cabinet and the gas-insulated switchgear. In addition, the existence of the waist hole 331 and the half hole 341 makes the bending bus adapt to different process errors, and in addition, the bending bus can be prevented from rotating.

Optionally, as shown in fig. 1, the electrical structure of the air-insulated metering cabinet further comprises a current transformer 4 and/or a voltage transformer 5. The current transformer 4 is fixed in the first cabinet 11, and the current transformer 4 is electrically connected with one end of the first sleeve 21 located in the first cabinet 11. The voltage transformer 5 is fixed in the first cabinet 11, and the voltage transformer 5 is electrically connected with the current transformer 4. The air insulation metering cabinet has enough space for placing the voltage transformer 5 and/or the current transformer 4, and is convenient to install. Fig. 1 shows only 1 current transformer 4 and voltage transformer 5, which in the first direction D1 has 3 current transformers 4 and voltage transformers 5, one for each phase.

As an exemplary illustration, the voltage transformer 5 is electrically connected to the current transformer 4 via a fuse 6. The connection mode meets the requirements of clients who need to be connected in the mode, and the market of the clients is expanded.

Alternatively, the current transformer 4 has a first terminal 41 and a second terminal 42, the first terminal 41 being located below the second terminal 42, the second terminal 42 being connected to the first sleeve 21 by a first set of conductive strips 71, the second terminal 42 being electrically connected to the voltage transformer 5. The first terminal 41 and the second terminal 42 are a current inflow terminal and a current outflow terminal, and specifically, the current inflow terminal is used as the first terminal 41 or the current outflow terminal is used as the current terminal, which may be set according to actual needs and will not be described herein. The first set of conductive bars 71 may be copper bars, and in particular may be two copper bars as shown in fig. 1 and 3, so as to be able to carry a larger current.

Alternatively, the second terminal 42 is connected to the voltage transformer 5 through the second set of conductive bars 72, a first insulating plate 74 is fixed under the first terminal 41, and the fuse 6 is fixed to the first insulating plate 74 and connected to the second set of conductive bars 72. The first insulating plate 74 may be fixed to the first terminal 41 by screws. The second set of conductive bars 72 may be copper bars, and in particular may be two copper bars as shown in fig. 1 and 3, so as to be able to carry a greater current. The first insulating plate 74 is present so that the voltage transformer 5 is not electrically connected to the first terminal 41. In addition, the first insulating plate 74 also functions as a support.

As an exemplary illustration, the top plate of the first cabinet 11 is equal in height to the top plate of the first air box 12. In this way, the bus bar assembly 3 is convenient to install, and the structure between two cabinets after cabinet combination is compact.

The utility model also provides a bus assembly for a switchgear cabinet assembly structure comprising a first cabinet body of an air-insulated metering cabinet and a second cabinet body of a gas-insulated switchgear cabinet. The first sleeve 21 is arranged on the top plate of the first cabinet in a penetrating way and is connected to the first expansion bus connector 31, and the second sleeve 22 is arranged on the top plate of the second cabinet in a penetrating way and is connected to the expansion bus connector 31. The top plate of the second cabinet body is also the top plate of the first air box. The busbar assembly 3 comprises a bent busbar for a switchgear cabinet of any of the embodiments described above. In this embodiment, the insulating housing 311 is a T-shaped insulating housing, and the conductor 312 is two arc-shaped conductive tiles. Wherein the material of the insulating housing 311 may be a resin. The first sleeve 21 is arranged perpendicular to the first top plate, the bent bus is arranged parallel to the top plate of the first cabinet, and the insulating housing 311 can enable two components with different arrangement directions to be connected together. Two arc-shaped conductive tiles are located in the T-shaped insulating housing 311, and the two arc-shaped conductive tiles are used for symmetrically surrounding the bending bus, and the fixing piece 8 is arranged in the two arc-shaped conductive tiles, the bending bus and the first sleeve 21 in a penetrating mode. For example, the two arc-shaped conductive tiles are semi-circular in shape, which can each surround the outside of the busbar mounting section. The arc-shaped conductive tiles are adopted to increase the contact area between the bending bus and the expansion bus connector 31, so that the bending bus and the expansion bus connector can be kept in good contact to ensure that the bending bus and the sleeve are electrically connected, and heat generation can be reduced.

Optionally, the busbar assembly 3 further comprises a block 9, the block 9 being located between the two electrical conductors 312, and the block 9 and the second busbar mounting section 34 being located on both sides of the fixing 8. In the case where only one side of the fourth bushing 24 is connected with the bent bus bar 3, as shown in fig. 4 and 5, one block 9 is placed on the other side of the fourth bushing 24, so that the electrical conductor 312 is prevented from being inclined during the fixing process. If another busbar is connected to the other side of the fourth sleeve 24, the block 9 can be removed.

Under the condition that the left side and the right side of the air insulation metering cabinet are provided with another cabinet body, the air insulation metering cabinet further comprises another electric structure corresponding to each phase, the electric structure comprises a third sleeve 23 and a bus bar assembly, the third sleeve 23 penetrates through the top plate of the first cabinet body 11, the bus bar assembly is positioned on the outer side of the top plate of the first cabinet body 11, the first end of the bus bar assembly is connected with one end of the third sleeve 23 extending out of the first cabinet body 11, the second end of the bus bar assembly is used for being connected with a fourth sleeve 34 on the second air box 13 of the other cabinet body, the fourth sleeve 34 extends out of the top of the second air box 13, and the first wiring terminal 41 is connected with one end of the third sleeve 23 positioned in the first cabinet body 11 through a third group of conductive bars 73. To carry more current, the third set of conductive bars 73 herein may include two conductive bars, such as two copper bars. A second insulating plate 75 is provided on the third group of conductive bars 73, and the second insulating plate 75 is provided on a side close to the first terminal 41. The electrical structure is used for connecting the cabinet body at the other side. Therefore, the cabinet splicing among the three cabinet bodies can be completed. The structure of the bus bar assembly in the other electrical structure is the same as that of the previous embodiment, and will not be described again here. The fourth bushing 34 is also connected to the bus bar assembly of the other electrical structure by an expansion bus bar connector having the same structure as the previous embodiment, and will not be described again. The other electrical structure is the same as the aforementioned electrical structure, and will not be described here again.

The utility model also provides a cabinet combining structure comprising the air insulation metering cabinet of any one of the above, and a gas insulation switch cabinet positioned at one side of the air insulation metering cabinet, wherein the gas insulation switch cabinet is provided with a first gas box 12. By adopting the electric structure, the parallel cabinet use between the gas-insulated switchgear and the air-insulated metering cabinet can be realized.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. Air insulation metering cabinet, including first cabinet body (11), its characterized in that, air insulation metering cabinet still includes the electrical structure that corresponds each looks, electrical structure includes:

the first sleeve (21) penetrates through the top plate of the first cabinet body (11);

the bus assembly (3) is located on the outer side of the top plate of the first cabinet body (11), the first end of the bus assembly (3) is connected to the first sleeve (21) and extends out of one end of the cabinet body, the second end of the bus assembly (3) is used for being connected with the second sleeve (22) on the first air box (12) of the second cabinet body, and the second sleeve (22) extends out of the top of the first air box (12).

2. The air insulated metering cabinet of claim 1, wherein the electrical structure further comprises at least one of:

the current transformer (4) is fixed in the first cabinet body (11), and the current transformer (4) is electrically connected with one end of the first sleeve (21) positioned in the first cabinet body (11);

the voltage transformer (5) is fixed in the first cabinet body (11), and the voltage transformer (5) is electrically connected with the current transformer (4).

3. Air-insulated metering cabinet according to claim 2, characterized in that the voltage transformer (5) is electrically connected with the current transformer (4) via a fuse (6).

4. An air-insulated metering cabinet according to claim 3, characterized in that the current transformer (4) has a first terminal (41) and a second terminal (42), the first terminal (41) being located below the second terminal (42), the second terminal (42) being connected to the first bushing (21) by a first set of conductive strips (71), the second terminal (42) being electrically connected to the voltage transformer (5).

5. The air-insulated metering cabinet according to claim 4, wherein the second terminal (42) is connected to the voltage transformer (5) through a second set of conductive bars (72), a first insulating plate (74) is fixed below the first terminal (41), and the fuse (6) is fixed to the first insulating plate (74) and connected to the second set of conductive bars (72).

6. The air insulated metering cabinet of claim 4, further comprising another one of said electrical structures, a second end of said busbar assembly (3) of said another one of said electrical structures being adapted to be connected to a fourth sleeve (24) on a second air box (13) of a third cabinet, said fourth sleeve (24) extending from a top of said second air box (13), said first terminal (41) being connected to a third sleeve (23) of said another one of said electrical structures by a third set of conductive strips (73), said third set of conductive strips (73) being provided with a second insulating plate (75) adjacent one end of said first terminal (41).

7. The air insulation metering cabinet according to claim 1, wherein the busbar assembly (3) comprises:

an expansion bus connector (31), wherein the expansion bus connector (31) is used for connecting one end of the sleeve extending out of the cabinet body;

a bus bar body (32);

a first busbar mounting section (33) located at a first end of the busbar body (32), the first busbar mounting section (33) having a waist hole (331);

and a second busbar mounting section (34) located at a second end of the busbar body (32), the second busbar mounting section (34) having a half hole (341).

8. The air insulation metering cabinet according to claim 7, wherein the number of the electrical structures is 3, 3 bus bar assemblies (3) are sequentially arranged in a first direction (D1), bus bar bodies (32) located at two sides in the first direction (D1) are provided with bending parts (321), a first spacing (L1) between 2 waist holes (331) located at two sides in the first direction (D1) is larger than a second spacing (L2) between half holes (341), and the bus bar bodies (32) located in the middle are linear.

9. The air insulation metering cabinet according to claim 8, wherein the angle of the bending portion (321) is 150 ° -170 °; and/or

The bending part (321) is positioned above the top plate of the first cabinet body (11).

10. Cabinet-by-cabinet structure, characterized by comprising an air-insulated metering cabinet according to any of claims 1-9 and a gas-insulated switchgear located on one side of the air-insulated metering cabinet, the gas-insulated switchgear having the first gas tank (12).