CN208142814U - A high-voltage cable cross-connection system anti-misconnection cross-connection box - Google Patents

Abstract

The invention relates to an anti-misconnection cross-interconnection box for a high-voltage cable cross-interconnection system, which includes a box body, a first line clamp group, a connecting copper bar, a supporting insulating plate and a second line clamping set; the supporting insulating plate is arranged on the box body , the number of supporting insulating plates is 2, which are respectively the first supporting insulating plate and the second supporting insulating plate; the first clamp group is installed on the first supporting insulating plate, and the second clamp group is installed on the The second supporting insulation board; the first wire clip group and the second wire clip group are connected through the connecting copper bar. The invention provides a high-voltage cable cross-interconnection system anti-misconnection cross-connection box, through the arrangement of different shapes of conductor pressing blocks and shielding pressing blocks, it reduces the time for disassembling the box during the test, avoids miswiring by staff and is safe for high-voltage cables. run a threat.

Description

A high-voltage cable cross-connection system anti-misconnection cross-connection box

technical field

The invention relates to the technical field of cross-connection box applications, and more specifically, to a cross-connection prevention box for a high-voltage cable cross-connection system.

Background technique

Urban power grids usually use high-voltage single-core cables for power transmission. When the cable core has current passing through it, an induced voltage is generated on the cable aluminum sheath, and the greater the cable load and the longer the line, the higher the induced voltage. If the three-phase cable circuit is completely symmetrical and the current in the three-phase circuit is also completely symmetrical, the voltage induced in the aluminum sheath of the three-phase cable is completely symmetrical, and their vector sum is zero. Using this principle, a longer cable line is provided with a three-phase aluminum sheath cross-connection at the joint position, and the induced voltage of the entire cross-connection section is reduced through two cross-connections. Figure 3 shows a three-phase aluminum sheath of a cross-connection section Phase cross-connect structure diagram.

However, if there is a wiring error in the three-phase cross-connection position, the voltage of the entire cross-connection section cannot be offset, and the induced voltage will generate excessive circulation in the sheath, resulting in ablation or even breakdown of the outer sheath of the cable. In practice, the three-phase cross-connection of the cable is realized through the cross-connection box, and the aluminum sheaths at both ends of the cable connector are respectively connected to the "core" and "skin" of the coaxial cable, and the coaxial cable is introduced into the cross-connection box, and the coaxial cable in the box The "core" and "skin" are respectively connected to two sets of clamps, and the cross-connection of the aluminum sheath of the cable is realized through different connection methods of copper bars between the clamps.

The existing cross-connection box does not have an anti-misconnection design. When two cross-connection boxes in one cross-connection section are not connected in the same way, the induced voltage of the entire cross-connection section cannot be offset and the circulation current is too large. In the preventive test of cable power outages, it is necessary to frequently disconnect and connect the cross-connection box, and a little carelessness may cause wiring errors, which poses a threat to the safe operation of high-voltage cables.

Contents of the invention

In order to solve the above technical defects that the existing cross-connection box has no anti-misconnection design, wiring errors are prone to occur, and threaten the safety of high-voltage cables, the present invention provides a high-voltage cable cross-connection system anti-misconnection cross-connection box.

For realizing above-mentioned purpose of the invention, the technical scheme that adopts is:

An anti-misconnection cross-connection box for a high-voltage cable cross-connection system, including a box body, a first line clamp group, a connecting copper bar, a supporting insulating plate, and a second line clamp group; wherein:

The supporting insulating plates are arranged on the box body, and the number of supporting insulating plates is 2, which are respectively the first supporting insulating plates and the second supporting insulating plates;

The first clamp set is mounted on the first supporting insulating board, and the second clamping set is mounted on the second supporting insulating board;

The first clamp set includes a phase A conductor briquetting block, a B phase conductor briquetting block and a C phase conductor briquetting block;

The second clamp group includes a phase A shielding press block, a B phase shielding press block and a C phase shielding press block;

The A-phase conductor pressing block is connected to the A-phase shielding pressing block through the connecting copper bar;

The B-phase conductor pressing block is connected to the B-phase shielding pressing block through the connecting copper bar;

The C-phase conductor pressing block is connected to the C-phase shielding pressing block through the connecting copper bar;

The shapes of the A-phase conductor briquetting block and the A-phase shielding briquetting block are set to be circular;

The shape of the B-phase conductor briquetting block and the B-phase shielding briquetting block is set to a square;

The shape of the C-phase conductor pressing block and the C-phase shielding pressing block is set as a regular hexagon.

Wherein, the first wire clamp set and the second wire clamp set are both configured as red copper structures.

Wherein, the first wire clamp set and the second wire clamp set are arranged at the same height.

Wherein, the box body is a stainless steel structure.

In the above scheme, the wire clamp part is made of red copper structure, which has high conductivity; the height of the first wire clamp group and the second wire clamp group are kept consistent during the design, which is convenient for the staff to install and connect the copper bars; The shape of the shielding briquetting block is set as a circle; the shapes of the B-phase conductor briquetting block and the B-phase shielding briquetting block are set as square; the shapes of the C-phase conductor briquetting block and the C-phase shielding briquetting block are set as regular hexagons; In the actual installation, the staff only need to connect the conductor pressing blocks and shielding pressing blocks of the same shape with connecting copper bars, which is easy to operate and prevents the staff from miswiring and threatening the safe operation of high-voltage cables.

In the above scheme, when installing the anti-misconnection cross-connection box, first open the cover of the cable sheath cross-grounding box, then strip and cut the end of the metal sheath connection cable, and strip the semiconductive layer to the size of 75. A support ring is inserted between the shielding layer and a heat-shrinkable sleeve is put on. Then put the connecting cable into the inlet pipe of the cable sheath protection grounding box, and insert the conductive cores into the conductor pressing blocks respectively, and insert the shielding layer into the shielding pressing blocks, that is, insert the shielding layer of the coaxial cable of A into the circular shielding pressing blocks, The shielding layer of phase B coaxial cable is inserted into the square shielding pressing block, and the shielding layer of phase C is inserted into the regular hexagonal shielding pressing block. Fix the regular hexagonal conductor block on the epoxy board of phase A, the round conductor block on the epoxy board of phase B, the square conductor block on the epoxy board of phase C, and then the same shape between the blocks Connect and fix with connecting copper bars, and finally fix and tighten with bolts; wrap 6 layers of waterproof sealing rubber tapes around the inlet pipe and connecting cable, and then heat and shrink the sheath tube so that the cable sheath protects the wire inlet and inlet of the grounding box. The sealing of the wire and cable is reliable. Finally, apply silicone grease on the flange of the box mouth and install the silicone gasket, cover the grounding box cover, and tighten it with screws to seal it.

Compared with prior art, the beneficial effect of the present invention is:

The invention provides a high-voltage cable cross-interconnection system anti-misconnection cross-connection box, which reduces the time for disassembling the box during the test by setting different shapes of the conductor press block and the shielding press block, and avoids the misconnection of the staff to ensure the safety of the high-voltage cable. run a threat.

Description of drawings

Figure 1 is a schematic diagram of the internal structure of the anti-misconnection cross-connection box of the high-voltage cable cross-connection system.

Figure 2 is a shape diagram of the conductor pressing block and the shielding pressing block of the anti-misconnection crossing interconnection box of the high-voltage cable cross-interconnection system.

Fig. 3 is a schematic structural diagram of an existing cross interconnection box.

Fig. 4 is a structural connection diagram of the existing cross interconnection box.

Among them: 1. The box body; 2. The first clamp group; 3. The connecting copper bar; 4. The second clamp group; 5. The first supporting insulating board; 6. The second supporting insulating board.

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figures 1 and 2, a high-voltage cable cross-connection system anti-misconnection cross-connection box includes a box body 1, a first line clamp group 2, a connecting copper bar 3, a supporting insulating plate and a second line clamp group 4; in:

The supporting insulating plates are arranged on the box body 1, and the number of supporting insulating plates is 2, which are respectively the first supporting insulating plates 5 and the second supporting insulating plates 6;

Wherein, the first clamp set 2 is installed on the first supporting insulating plate 5, and the second clamp set 4 is installed on the second supporting insulating plate 6;

The first clamp set 2 includes a phase A conductor briquetting block, a B phase conductor briquetting block and a C phase conductor briquetting block;

The second clamp set 4 includes a phase A shielding press block, a B phase shielding press block and a C phase shielding press block;

The A-phase conductor pressing block is connected to the A-phase shielding pressing block through the connecting copper bar 3;

The B-phase conductor pressing block is connected to the B-phase shielding pressing block through the connecting copper bar 3;

The C-phase conductor pressing block is connected to the C-phase shielding pressing block through the connecting copper bar 3;

The shapes of the A-phase conductor briquetting block and the A-phase shielding briquetting block are set to be circular;

The shape of the B-phase conductor briquetting block and the B-phase shielding briquetting block is set to a square;

The shape of the C-phase conductor pressing block and the C-phase shielding pressing block is set as a regular hexagon.

More specifically, both the first wire clamp set 2 and the second wire clamp set 4 are made of copper structure.

More specifically, the first wire clamp set 2 and the second wire clamp set 4 are arranged at the same height.

More specifically, the box body is a stainless steel structure.

In the specific implementation process, the wire clamp part adopts a copper structure with high conductivity; the height of the first wire clamp group 2 and the second wire clamp group 4 are kept consistent during design, which is convenient for the staff to install and connect the copper bar 3; the phase A conductor The shape of the briquetting block and phase A shielding briquetting block is set as a circle; the shape of the B phase conductor briquetting block and the B phase shielding briquetting block is set as a square; the shape of the C phase conductor briquetting block and the C phase shielding briquetting block is set as a regular hexagon ;Reserve the distance for operation. In the actual installation, the staff only need to connect the conductor pressing block and the shielding pressing block with the same shape with the connecting copper bar 3. The operation is simple, and the staff can avoid miswiring and operate the high-voltage cable safely. create a threat.

In the specific implementation process, when the anti-misconnection cross-connection box is installed, first open the cover of the cable sheath cross-grounding box, and then peel off the end of the metal sheath connection cable, strip the semi-conductive layer to the size of 75, and in the half A support ring is inserted between the conductive layer and the shielding layer, and a heat-shrinkable sleeve is placed on it. Then put the connecting cable into the inlet pipe of the cable sheath protection grounding box, and insert the conductive cores into the conductor pressing blocks respectively, and insert the shielding layer into the shielding pressing blocks, that is, insert the shielding layer of the coaxial cable of A into the circular shielding pressing blocks, The shielding layer of phase B coaxial cable is inserted into the square shielding pressing block, and the shielding layer of phase C is inserted into the regular hexagonal shielding pressing block. Fix the regular hexagonal conductor block on the epoxy board of phase A, the round conductor block on the epoxy board of phase B, the square conductor block on the epoxy board of phase C, and then the same shape between the blocks Connect and fix with the connecting copper bar 3, and finally fix and tighten with bolts; wrap 6 layers of waterproof sealing rubber tapes at the inlet pipe and the connecting cable, and then heat and shrink the sheath tube so that the cable sheath protects the inlet of the grounding box and the The sealing of the incoming cable is reliable. Finally, apply silicone grease on the flange of the box mouth and install the silicone gasket, cover the grounding box cover, and tighten it with screws to seal it.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (4)

1. A high-voltage cable cross-connection system anti-misconnection cross-connection box, including the box body (1), the first clamp group (2), the connecting copper bar (3), the supporting insulating plate and the second clamp group (4) ;in: The supporting insulating plates are arranged on the box body (1), and the number of supporting insulating plates is 2, which are the first supporting insulating plates (5) and the second supporting insulating plates (6); The first clamp set (2) is installed on the first supporting insulating plate (5), and the second clamp set (4) is installed on the second supporting insulating plate (6); The first clamp set (2) includes a phase A conductor compact, a B phase conductor compact and a C phase conductor compact; The second clamp group (4) includes a phase A shielding press block, a B phase shielding press block and a C phase shielding press block; The A-phase conductor pressing block is connected to the A-phase shielding pressing block through the connecting copper bar (3); The B-phase conductor pressing block is connected to the B-phase shielding pressing block through the connecting copper bar (3); The C-phase conductor pressing block is connected to the C-phase shielding pressing block through the connecting copper bar (3); It is characterized by: The shapes of the A-phase conductor briquetting block and the A-phase shielding briquetting block are set to be circular; The shape of the B-phase conductor briquetting block and the B-phase shielding briquetting block is set to a square; The shape of the C-phase conductor pressing block and the C-phase shielding pressing block is set as a regular hexagon. 2. A high-voltage cable cross-interconnection system anti-misconnection cross-connection box according to claim 1, characterized in that: the A-phase conductor briquetting block, B-phase conductor briquetting block, and C-phase conductor briquetting block are all made of red copper structure. 3. The anti-misconnection cross-connection box of a high-voltage cable cross-connection system according to claim 1, characterized in that: the first clamp group (2) and the second clamp group (4) are set at the same height. 4. The anti-misconnection cross-connection box of a high-voltage cable cross-connection system according to claim 1, characterized in that: the box body (1) is made of stainless steel.