CN105048385B - A kind of split conductor conductor spacer and the wire clamp gold utensil using the conductor spacer - Google Patents

Abstract

The invention discloses a spacer bar for split wires and a wire clip hardware using the spacer bar. The branch line clamping block of the spacer is an annular frame body or a regular polygonal frame, and the branch line grooves are evenly distributed on the outer periphery of the branch line clamping block around the circumference. In this way, when a changeable conversion connection is performed, the branch line clamp block in the shape of a ring frame or a regular polygonal frame will realize shunting between each branch line groove, compared with the prior art through each independent connection contact finger. With the shunt structure, the flow performance of the branch line clamp block in the present invention will be significantly improved, so that in the process of large current shunt, the calorific value on the branch line clamp block will be greatly reduced, which also reduces the high current shunt. The power consumption in the process improves the efficiency of power transmission.

Description

A split wire spacer and a wire clip fitting using the spacer

technical field

The invention relates to a spacer bar for split wires and a wire clip hardware using the spacer bar.

Background technique

At present, when the cylindrical terminals and split conductors in domestic UHVDC converter stations are arranged vertically, more complex wire clip fittings are used to connect them, which leads to high manufacturing costs and difficulty in on-site installation, which is not conducive to dismantling during maintenance. Pack.

Chinese patent document CN 104505787 A (published on April 8, 2015) discloses a "pipe busbar split wire clamp hardware", which includes two clamp bodies that can be buckled up and down relative to each other, and the two ends of the clamp body There are respectively a bus clamp block with a bus duct and a branch line clamp block with a branch line slot, wherein the extension directions of the bus duct and the branch line slot are perpendicular to each other, and the branch line clamp block is fixed on the bus bar clamp block at the side of the bus duct , and the branch line clamp block is a conductive contact finger extending radially along the busbar groove, so that after the two line clamp bodies are relatively fastened together, the bus bar clamp blocks on the two line clamp bodies are synthesized to hold the pipe busbar on the outer circumference of the pipe busbar Clamping hoops, each branch line clamp block on the body of the two line clamps is biased on the same side of the tube busbar hoop, and each split wire is clamped and fixed by fixing the line clamp cover plate on the branch line clamp block, so as to realize the tube busbar and split wire The T connection conversion. However, due to the limitation of the current flow capacity of the conductive contacts, during use, when such fittings are applied to terminals for large current shunts and T-connection positions of split wires, overheating and corona are prone to occur on the conductive contacts. As a result, the large current shunting between the terminal block and the split wires causes a huge power consumption, which increases the power consumption in power transmission.

Contents of the invention

The object of the present invention is to provide a split wire spacer with good flow performance, and also provide a wire clip fitting using the split wire spacer.

In order to achieve the above object, the technical scheme of the split wire spacer among the present invention is as follows:

Split wire spacer, including the clamp body, one end of the clamp body is provided with a bus clamp block with a bus groove, and the other end is provided with a branch clamp block with a branch groove, and the branch clamp is a ring frame or a regular polygon frame , the branch line slots are evenly distributed on the outer circumference of the branch line clamping block at intervals around the circumference.

The groove length direction of the branch line groove and the groove length direction of the bus groove are vertically staggered.

The connecting plate extending along the length direction of the bus duct is bridged and fixed between the branch line clamping block and the bus bar clamping block. The faces of the boards where the clamping blocks are located are opposite to each other.

The busbar clamping block includes more than two clamping blocks arranged in sequence, and each clamping block is provided with a clamping groove which is butted in sequence to synthesize the busway.

The branch line clamping block is a regular polygonal frame, and the edges and corners of the branch line clamping block parallel to the groove length direction of the branch line groove are all convex rounded corners.

The technical scheme of the middle line clip metal tool of the present invention is as follows:

Wire clamp fittings, including the wire clamp body for relative fastening, one end of the wire clamp body is provided with a bus clamp block with a bus groove, and the other end is provided with a branch wire clamp block with a branch wire groove, and the branch wire clamp block is a ring frame body or a regular polygonal frame, and the branch line slots are evenly distributed on the outer periphery of the branch line clamping block around the circumference.

The groove length direction of the branch line groove and the groove length direction of the bus groove are vertically staggered.

The connecting plate extending along the length direction of the bus duct is bridged and fixed between the branch line clamping block and the bus bar clamping block. The faces of the boards where the clamping blocks are located are opposite to each other.

The busbar clamping block includes more than two clamping blocks arranged in sequence, and each clamping block is provided with a clamping groove which is butted in sequence to synthesize the busway.

The branch line clamping block is a regular polygonal frame, and the edges and corners of the branch line clamping block parallel to the groove length direction of the branch line groove are all convex rounded corners.

The branch line clamping block of the middle spacer in the present invention is an annular frame body or a regular polygonal frame, and the branch line grooves are evenly distributed on the outer circumference of the branch line clamping block at intervals around the circumference. In this way, when a changeable conversion connection is performed, the branch line clamp block in the shape of a ring frame or a regular polygonal frame will realize shunting between each branch line groove, compared with the prior art through each independent connection contact finger. With the shunt structure, the flow performance of the branch line clamp block in the present invention will be significantly improved, so that in the process of large current shunt, the calorific value on the branch line clamp block will be greatly reduced, which also reduces the large current shunt. The power consumption in the process improves the efficiency of power transmission.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the embodiment of the wire clip hardware of the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the top view of Fig. 2;

Fig. 5 is a schematic structural view of the branch clamp block in Fig. 2;

Fig. 6 is the front view of Fig. 5;

Fig. 7 is a schematic structural view of the wire clip cover plate in Fig. 2;

Fig. 8 is a schematic diagram of the three-dimensional structure of the busbar clamping block in Fig. 1;

Fig. 9 is the front view of Fig. 8;

Fig. 10 is a schematic diagram of the welding structure of the branch clamp block on the connecting plate in Fig. 2 .

detailed description

The embodiment of the wire clip fittings of the present invention: as shown in Fig. 1 to Fig. 10, when the wire clip fittings are applied to the four-variable and one-split spacer bar wire clip fittings in the UHV DC converter station in the field of electric equipment manufacturing, it mainly consists of two Four-change-one-split spacer bars with the same structure are snapped together to realize the T-connection conversion between the four-split wire 7 and the cylindrical terminal 6 . The four-change-one-split spacer bar is mainly composed of three parts, the bus bar clamp block, the connection plate 3 and the branch line clamp block 1, which are electrically connected to each other to form the wire clamp body. The bus bar clamp block is used to clamp and fix on the cylindrical terminal 6. , to support the entire spacer bar, and realize conductive contact with the cylindrical terminal 6; the connecting plate 3 plays a role of conductive connection between the bus bar clamp block and the branch line clamp block 1, and realizes the cylindrical terminal 6 and four The flow is divided between the split wires 7 ; the branch clamp 1 is used to connect the four split wires 7 so as to act as a conductive support between the four split wires 7 .

The branch line clamp block 1 is a square frame body, and the four sides of the branch line clamp block 1 are respectively provided with branch line slots 11 in the middle of the corresponding frame edges, and each branch line slot 11 is a semicircle extending along the centerline direction of the branch line clamp block 1 The grooves on both sides of the branch wire groove 11 are convex rounded corners transitionally connected between the groove wall surface of the branch wire groove 11 and the outer peripheral surface of the branch wire clamp block 1 . The adjacent two frames of the branch line clamping block 1 are transitionally connected by convex rounded corners, that is, the edges and corners of the branch line clamping block 1 parallel to the groove length direction of the branch line groove 11 are convex rounded corners, so that the corners of the branch line clamping block 1 The adjacent side surfaces of the inner ring and the outer ring are smoothly transitioned through convex rounded corners, so as to avoid the phenomenon of corona caused by the edges and corners around the branch clamp block 1 in the large current shunt. Both side end faces of the branch line clamp block 1 are provided with a stress groove 12 between two adjacent branch line grooves 11. The stress groove 12 is an arc-shaped long hole whose extension direction is parallel to the fillet, so as to pass through the stress groove. 12. Reduce the stress concentration of the branch clamp block 1 around the rounded corners. The branch line clamp block 1 is connected with a line clamp cover plate 2 that is buckled and covered on the notch of the branch line groove 11 by fastening screws. The branch line groove 11 matches the interfitting clamping slot 21, and the clamping card slot 21 is combined with the branch line slot 11 to clamp and fix the split wire 7 after the clamp cover plate 2 is buttoned and fixed on the branch line clamp block 1. Corresponding to the flat side of the wire clamp cover plate 2, there are threaded holes symmetrically arranged on both sides of the clamping groove 21 in the groove width direction, so as to pass through the rod of the fastening screw from the branch wire clamp block 1 After passing through the screw hole on the top, it is screwed into the threaded hole, so that the branch line clamp block 1 is fixed on the branch line clamp block 1 by the fastening screw. Between the plane side and the arc surface of the cable clamp cover 2 and between the two side walls of the clamping groove 21 and the plane side of the cable clamp cover 2 are all connected by convex rounded corners.

The connecting plate 3 is a long and narrow rectangular plate body, and the edges and corners around the rectangular plate body are all convex rounded corners. One end of the connection plate 3 is the branch line connection end connected to the branch line clamp block 1, and the other end is the bus bar connection end connected to the bus bar clamp block, wherein one side of the branch line connection end is provided with a pair of diagonal parts for the branch line clamp block 1 Carry out the diagonal welding position 31 of welding, so that the two top corners of the branch clamp block 1 are respectively fixed on the connecting plate 3 through closed welds, and the stress between the diagonal welding positions is provided on the branch line connection end. Hole 32, the stress hole 32 is a rectangular hole penetrating through the two sides of the connecting plate; three pairs of bus connecting holes 33 arranged at intervals along the length direction of the busbar are opened on the connecting end of the busbar, and the busbar connecting holes 33 are for penetrating through the connecting plate 3 Bolt holes on both sides of the board.

The busbar clamping block is formed by butt jointing of three busbar clamping blocks 5 in sequence. The cross section of each busbar clamping block 5 is isosceles trapezoidal, and the edges and corners of the busbar clamping blocks are convex rounded corners. The bottom surface of the bus bar clamping block 5 is a positioning surface 51 attached to the side plate surface of the connection plate 3 facing away from the branch line clamping block 1, and the top surface of the bus bar clamping block 5 is parallel to the bottom surface, and a half surface is provided on the top surface. Circular clamping groove 52, the clamping groove 52 extends along the longitudinal direction of the busbar clamping block, and the clamping grooves 52 of the three busbar clamping blocks are oppositely butted to form a busbar for clamping on the cylindrical terminal 6 The groove, the groove length direction of the bus groove and the groove length direction of the branch groove 11 are vertical to each other. The busbar clamping block 5 is also provided with a pair of positioning holes that run through the top and bottom surfaces. The two positioning holes are symmetrically arranged on both sides of the clamping groove 52 in the groove width direction, and the two positioning holes are connected to the busbar on the connecting plate 3. The hole 33 is suitable for fixing the busbar clamping block 5 on the connecting plate 3 after the rod of the connecting bolt 4 passes through the positioning hole and the busbar connecting hole 33 .

After the two spacers are buckled relatively, the busbar clamp blocks in the clamp body of the two spacer bars are buckled relatively to form a busbar hoop that is tightly held on the outer periphery of the terminal 6, so that the three busbar clamping blocks 5 can be used for wiring The tightness of the terminal 6 increases the contact area between the terminal 6 and the clamp body, and also enhances the flow performance between the two. At the same time, each branch line slot 11 in the two branch line clamp blocks 1 will also be opposite one by one, so that The same split conductor 7 can be inserted into the branch grooves 11 of the two branch clamps 1 for current shunting, which further ensures the conductive contact area between the split conductor 7 and the branch clamp 1 during current transmission, enhances the flow performance, and also increases the size of the wire. Clip and lead friction, effectively prevent split lead 7 from falling off from the branch clamp block 1.

In this embodiment, the branch line clamp block 1 is designed as a square frame to reduce weight. The branch line clamp block 1 and the connecting plate 3 are welded to form a welded body. When installing, the bus bar clamp block is placed between the two welded bodies, and the bus bar clamp block Clamp and fix the terminal 6, that is, fasten it through the connecting bolt 4, and reserve a certain gap between the two bus clamping blocks during the process of clamping the terminal 6 by the bus clamping block, so that when the connecting bolt 4 is tightened During the process, the two bus clamps can be better used to hold the terminal 6 tightly to prevent loosening. The branch line clamp block 1 arranges the split wires 7 according to the set split spacing, the split wires 7 pass through the two side-by-side branch line clamp blocks 1, and the split wires 7 are fixed on the two branch line clamp blocks 1 by using the line clamp cover plate 2, that is The fastening screw compresses the split wire 7 in the branch line groove 11 through the clamp cover plate 2, and a certain gap is also reserved between the clamp cover plate 2 and the branch line clamp block 1, so that the fastening screw can be tightened in the process of tightening. The center wire clip cover plate 2 can better compress the split wire 7.

The wire clamp fittings in this embodiment are suitable for the position where the terminal 6 and the split conductor 7 are vertically arranged in the converter station. Using the wire clamp fittings can avoid the corona generated when a large current passes through, and ensure good conductive current-carrying performance. The equipment in the HVDC converter station is well connected. The branch wire clip block 1 in the spacer bar of the wire clip hardware is made of ZL101A cast aluminum silicon alloy, which is light in weight, high in strength, and has high temperature resistance and corrosion resistance. The surfaces of the branch line clamp block 1, line clamp cover plate 2, and bus bar clamp block 5 are all treated with arcs to avoid heating and corona when large current passes through fittings and equipment terminals.

In other embodiments of the wire clip hardware, when the branch line clamp block adopts two-split, three-split, six-split and other spacer bodies, the wire clip hardware can also be applied to two-in-one, three-in-one, six-in-one and so on to convert the connection method. Of course, when the split wires and terminals do not adopt the T-connection (that is, vertical arrangement), it is only necessary to adjust the relative direction of the bus duct and the branch duct on the bus clamp block and the branch clamp block.

The embodiment of the spacer bar of the split wire in the present invention: the structure of the spacer bar of the split wire in this embodiment is the same as that of the spacer bar in the above embodiment, so it will not be described again.

Claims (10)

1. Split wire spacer, including the clamp body, one end of the clamp body is provided with a bus clamp block with a bus groove, and the other end is provided with a branch wire clamp block with a branch wire groove. It is characterized in that the branch wire clamp block is ring-shaped A frame body or a regular polygonal frame, the branch line slots are evenly distributed on the outer periphery of the branch line clamping block around the circumference. 2 . The split wire spacer according to claim 1 , characterized in that, the slot length direction of the branch line slot and the slot length direction of the bus slot are vertically staggered. 3. The split wire spacer according to claim 2, characterized in that, a connecting plate extending along the groove length direction of the bus duct is bridged and fixed between the branch line clamp block and the bus bar clamp block, and the branch line clamp block and the bus bar clamp block are respectively Located on both sides of the connecting plate, the notch of the bus duct faces away from the direction of the board where the bus clamp block is located. 4. The split conductor spacer according to claim 1, 2 or 3, wherein the busbar clamping block comprises more than two clamping blocks arranged in sequence, and each clamping block is provided with butt joints in sequence to synthesize the described clamping blocks. Clamping groove for busway. 5. The split wire spacer according to claim 1, 2 or 3, characterized in that, the branch line clamp block is a regular polygonal frame, and the corners of the branch line clamp block parallel to the groove length direction of the branch line groove are convex circles horn. 6. Wire clip fittings, including a wire clip body used for relative buckling, one end of the wire clip body is provided with a bus bar clamp block with a bus bar slot, and the other end is provided with a branch line clamp block with a branch line slot, characterized in that, The branch line clamping block is an annular frame body or a regular polygonal frame, and the branch line slots are evenly distributed on the outer periphery of the branch line clamping block at intervals around the circumference. 7. The wire clamp fitting according to claim 6, characterized in that the groove length direction of the branch wire groove and the groove length direction of the bus groove are vertically staggered in space. 8. The wire clamp fitting according to claim 7, characterized in that, a connecting plate extending along the groove length direction of the bus duct is bridged and fixed between the branch line clamp block and the bus bar clamp block, and the branch line clamp block and the bus bar clamp block are respectively positioned at On both sides of the connecting plate, the notch of the bus duct faces away from the direction of the board where the bus clamp block is located. 9. The wire clamp fitting according to claim 6, 7 or 8, characterized in that the busbar clamping block comprises more than two clamping blocks arranged in sequence, and each clamping block is provided with sequential butt joints to synthesize the busbar Groove clamping groove. 10. The wire clamp fitting according to claim 6, 7 or 8, characterized in that the branch line clamping block is a regular polygonal frame, and the corners of the branch line clamping block parallel to the groove length direction of the branch line groove are all convex rounded corners .