WO2019010890A1

WO2019010890A1 - Gis device and three-phase-in-one-box busbar cylinder thereof

Info

Publication number: WO2019010890A1
Application number: PCT/CN2017/111297
Authority: WO
Inventors: 胡劲涛; 李金狮; 闫亚刚; 黄坤鹏; 李健; 刘静; 张红宇
Original assignee: 河南平高电气股份有限公司; 平高集团有限公司; 国家电网公司
Priority date: 2017-07-14
Filing date: 2017-11-16
Publication date: 2019-01-17
Also published as: CN107332151A

Abstract

Provided in the present invention is a three-phsase-in-one-box busbar cylinder. The three-phase-in-one-box busbar cylinder comprises a cylinder body. Three single-phase attachment mounting holes are provided at intervals in the axial direction on the cylinder body. Single-phase attachment mounting flanges are provided at the single-phase attachment mounting holes. Basin-type insulators are provided on the single-phase attachment mounting flanges. An electrical connector electrical-conductively connected to an axial conductor is also provided within the cylinder body. Protruding extremities of the basin-type insulators are arranged facing the interior of the cylinder body. One extremity of the electrical connector is provided on the end surfaces of the protruding extremities of the basin-type insulators. Also provided in the present invention is a GIS device comprising the three-phase-in-one-box busbar cylinder. The employment of the three-phase-in-one-box busbar cylinder and the GIS device thereof of the present invention obviates the need to provide a supporting insulator within the three-phase-in-one-box busbar cylinder to support the axial conductor, thus reducing the degree of complexity of the three-phase-in-one-box busbar cylinder.

Description

GIS equipment and three-phase common box busbar body

Technical field

The invention relates to the field of switch devices, in particular to a GIS device and a three-phase common box busbar body thereof.

Background technique

GIS equipment is the abbreviation of gas-insulated metal-enclosed switchgear. The main busbar of GIS equipment is the key functional unit for realizing energy input and output. The GIS main busbar in the prior art is mostly in the form of three-phase common box, GIS main busbar and The components of the structure such as the isolating switch and the circuit breaker connected to the main bus are called intervals. FIG. 1 to FIG. 2 are schematic diagrams of a GIS device in the prior art. The main bus bar includes a three-phase common box bus bar body 1 , and three single-phase accessory mounting holes are arranged along the axis on the three-phase common box bus bar body 1 . Single-phase accessory mounting flange 2 is fixed on three single-phase accessory mounting holes, single-phase accessory mounting flange 2 is a necked flange, and a single-phase accessory mounting flange 2 is bolt-mounted The insulator 3, the convex end of the basin insulator 3 is disposed outside the three-phase common box busbar body 1, and the electrical insulator transition conductor 4 is mounted on the basin insulator 3, and the inner end of the electrical connector transition conductor 4 is connected The phase conductor 5, the electrical connection body transition conductor 4 and the phase conductor 5 together form an electrical connection body, the contact holder 6 is arranged at the lower end of the electrical connection body, and the spacer conductor is arranged in the contact holder 6, the prior art In the middle, the three inter-spacer conductors are arranged in an isosceles triangle. In the prior art, the electrical connector transition conductor 4 is present because the electrical connector is close to the three-phase common-box busbar cylinder and is provided for optimizing the electric field structure.

In the prior art, the phase spacing between the spacer conductors (ie, the axial conductors) is small, generating large electric power, and easily causing heat accumulation, and the heat dissipation performance is not good, and at the same time, the electrical connectors are long, and the basin type The intersection between the insulator and the electrical connector is subjected to a large moment, and the stress conditions are severe. The basin insulator alone cannot fix the electrical connector and the spacer conductor, so in order to overcome the electricity The influence of power must be provided on the inner wall of the three-phase common-box busbar with support insulators such as column insulators and disc insulators to fix the conductor. Meanwhile, as can be seen from FIG. 1, the inter-station conductor is composed of an inter-station conductor transition conductor 7 and a connection conductor 11 connecting adjacent two spaced-apart transition conductors, and the column insulator 8 supports the fixed transition conductor. A contact seat 9 is attached to the inter-station conductor transition conductor 7 via an insulating plug 10, and a connecting conductor 11 is mounted in the contact housing 9.

As described above, in the three-phase common box busbar body of the prior art GIS equipment, more supporting insulators and transition conductors are used, resulting in extremely complicated structure, large variety and quantity of components, high cost, and low assembly efficiency. , the reliability is poor.

Summary of the invention

It is an object of the present invention to provide a three-phase common box busbar body and its GIS equipment to reduce the complexity of the three-phase common box busbar body.

In order to achieve the above object, an aspect of the present invention provides a three-phase common box busbar body, comprising a cylinder body, three single-phase accessory mounting holes are arranged on the cylinder body at an axial interval, and each single-phase accessory mounting hole Each has a single-phase accessory mounting flange, and each single-phase accessory mounting flange is provided with a basin insulator, and the cylinder body is further provided with an electrical connection body electrically connected to the axial conductor, and the basin insulator is convex The starting end is disposed toward the body of the cylinder, and one end of the electrical connector is disposed on a convex end surface of the basin insulator.

The three-phase common box busbar body provided by the present invention, the convex end of the basin insulator is disposed toward the body of the cylinder body, and one end of the electrical connector body is disposed on the end surface of the convex end of the basin insulator, The distance between the end surface of the convex end and the center of the body of the cylinder is reduced, that is, the length of the electrical connector is reduced. Compared with the prior art, when the electrical connector is subjected to electrodynamic force, since the length of the electrical connector is reduced, the strength of the joint of the basin insulator and the electrical connector can overcome the moment of the electric power to the joint, It is necessary to provide a supporting insulator in the three-phase common box busbar body to support the axial conductor, which reduces the complexity of the three-phase common box busbar.

Further, the single-phase accessory mounting flange is a neckless plate flange.

Further, the electrical connector has an integral structure, and the electrical connector has an electrical connector extending along a longitudinal direction of the electrical connector through the heat dissipation hole.

The electrical connector penetrates the heat dissipation hole to release the heat generated by the electrical connector in time, and also reduces the weight of the electrical connector.

Further, one end of the electrical connector away from the basin insulator is provided with a contact seat, and the axial conductor is an integral spacer conductive tube disposed in the contact seat, and the spacing between the conductive tubes is electrically conductive along the space A conductive tube extending in the longitudinal direction of the tube penetrates the heat dissipation hole.

Further, an end of the inter-venge conducting tube located in the contact holder is provided with an insulating spacer that closes the conductive tube through the opening of the heat dissipation hole.

The insulating spacer can electrically connect the end of the conductive tube between the gap and the electrical connector so that contact overheating does not occur between the two.

Further, an annular snap-fit protrusion is disposed on an outer edge of the insulating spacer, and a conductive tube corresponding to the insulating spacer in the conductive tube of the interval is disposed through an inner wall of the hole of the heat dissipation hole for being fitted with a latching protrusion The snap-in groove is engaged.

Further, the single-phase accessory mounting flange is provided with a threaded blind hole for mounting the accessory.

Further, a plurality of inspection holes are disposed on the body of the cylinder, and the opening position of the inspection hole corresponds to the intersection of the electrical connection body of each phase and the conductive tube between the intervals, and the cover mounting flange is neckless. Plate flange.

Further, the plate flange of the single-phase accessory mounting hole and the plate flange of the inspection hole are attached to the outer peripheral surface of the body of the cylinder body near the center of the cylinder body, and the aperture of the single-phase accessory mounting hole and the inspection hole Both are larger than the inner diameter of the plate flange, and the hole wall of the single-phase accessory mounting hole and the hole wall of the inspection hole are welded to the end face of the plate flange through the arc-shaped fillet weld.

Further, a side of the single-phase accessory mounting flange corresponding to the adjacent single-phase accessory mounting flange is provided with a trimming edge.

Further, the axial ends of the tubular body are provided with abutting flanges, and the single ends at the axial ends The accessory mounting flange is also provided with a trim on one side of the mating flange.

Another aspect of the present invention also provides a GIS device comprising the three-phase common box busbar body of any of the above.

DRAWINGS

1 is a schematic view showing the assembly of a three-phase common-box busbar body, an electrical connector, and an inter-slot conductor in a GIS device in the prior art;

Figure 2 is a left side view of Figure 1;

3 is a schematic view showing the assembly of a three-phase common-box bus bar body, an electrical connector, and a space-conducting pipe in the embodiment of the GIS device of the present invention;

4 is a schematic view showing the arrangement of three-phase electrical connectors in the embodiment of the GIS device of the present invention;

5 is a schematic diagram of a three-phase common box busbar body in an embodiment of a GIS device according to the present invention;

Figure 6 is a plan view of Figure 5;

Figure 7 is a cross-sectional view taken along line A-A of Figure 5;

8 is a schematic view showing the assembly of a single-phase accessory mounting flange and a basin insulator in the embodiment of the GIS device of the present invention;

9 is a schematic diagram of a B-phase electrical connector in an embodiment of a GIS device according to the present invention;

Figure 10 is a cross-sectional view of the left side view of Figure 9;

11 is a schematic diagram of an A(C) phase electrical connector in an embodiment of a GIS device of the present invention;

Figure 12 is a cross-sectional view of the top view of Figure 11;

Figure 13 is a cross-sectional view showing a conductive tube between the spacers in the embodiment of the GIS device of the present invention;

Figure 14 is an enlarged view of a portion A in Figure 13;

Figure 15 is a schematic illustration of an insulating spacer in an embodiment of a GIS device of the present invention.

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

A specific embodiment of the GIS device of the present invention, as shown in FIG. 3 to FIG. 15, the GIS device includes a main bus bar, and the components of the main bus bar and the isolating switch connected to the main bus bar and the circuit breaker are called intervals, adjacent to each other. The two spaces are connected by a conductive tube between the spaces.

The main busbar comprises a three-phase common-box busbar cylinder, and the three-phase common-box busbar cylinder comprises a cylinder body 1. The cylinder body 1 is axially spaced apart from three single-phase accessory mounting holes, and is mounted on each single-phase accessory mounting hole A single-phase accessory mounting flange 2 is provided, and abutting flange 3 is provided at both axial ends of the cylinder body for docking adjacent three-phase common-box busbar cylinders. In this embodiment, the single-phase accessory mounting flange 2 is a neckless plate flange, which can reduce the distance between the flange face and the center of the barrel body. The single-phase accessory mounting flange 2 is used to mount the basin insulator and the connection to the isolation switch, circuit breaker, etc. in the same interval. As shown in FIG. 3, a bolt insulator 4 is mounted on each of the single-phase accessory mounting flanges 2, wherein one end of the basin insulator 4 is disposed toward the center of the cylinder body, and the pot insulator 4 is electrically connected. In the embodiment, the electrical connector is of a unitary structure. As shown in FIG. 3, the number of electrical connectors is three, including a vertical electrical connector 6 (ie, a B-phase electrical connector) and two electrical connectors 5 having a certain degree of curvature (ie, phase A and phase C). The connecting body), the projection of one end of the three electrical connectors away from the basin insulator 4 in the axial direction of the cylinder body 1 is three vertices of an isosceles triangle which is approximately equilateral triangle.

In the present invention, the protruding end which is convex outwardly by using the pot insulator is disposed in the body of the cylinder, and the electrical connector in the embodiment of the present invention is the same as the size of the cylinder body of the prior art. The distance between the side walls of the barrel body is lengthened, that is, the electrical connection body can be closer to the central portion of the barrel body (the protruding end of the pot insulator in the prior art faces outward, so that the electrical connection with the basin insulator is connected The side of the body close to the body of the cylinder, please refer to 1, the upper end of the electrical connector in Fig. 1 will be carried by the basin insulator closer to the side wall of the body of the cylinder), and it is not easy to generate an electric field to the body of the cylinder. The invention forms a loop. Therefore, the embodiment of the present invention eliminates the support insulator and the transition conductor in the prior art, so that the structure in the three-phase common box busbar is simpler and easier to process. At the same time, since the convex end of the basin insulator faces inward and is closer to the center of the cylinder body, In the case of the same size as the prior art barrel body, the length of the electrical connection between the axial conductor and the raised end of the basin insulator is reduced, when the electrical connector is subjected to electrodynamic forces The torque at the intersection of the electrical connector and the basin insulator is reduced (reducing the length of the electrical connector is equivalent to shortening the arm, and the torque can be reduced under the same force).

In the present invention, by adopting a non-necked single-phase attachment mounting flange and a convex end of the basin insulator disposed inwardly, the length of the electrical connector is reduced together, and when the electrical connector is subjected to electric power, it is reduced. For the torque at the intersection of the electrical connector and the basin insulator, the influence of the electric power can be overcome by relying solely on the basin insulator. At the same time, as can be seen from FIG. 3, after the plate-type flange and the basin-type insulator disposed inwardly, the distance between the electrical connector and the body of the cylinder is lengthened, and it is not easy to generate an electric field to the body of the cylinder to form a loop. The electrical connector can have a one-piece structure. Compared with the prior art, the support insulator and the transition conductor are eliminated, so that the structure in the three-phase common box busbar is simpler and easier to process.

An electrical connector extending along a longitudinal direction of the electrical connector extends through the heat dissipation hole 12 in the interior of the electrical connector. On the other hand, the electrical connector penetrates the heat dissipation hole 12 to release the heat generated by the electrical connector in time. The weight of the electrical connector can be reduced, and the torque acting at the intersection of the electrical connector and the basin insulator can be further reduced. Due to the skin effect of the conductor flow, the opening of the conductor through the heat dissipation hole does not affect the electrical conductivity of the electrical connector.

A contact holder 7 is disposed at one end of the electrical connector away from the basin insulator, and a spring finger is disposed in the contact holder 7. In the contact holder, an inter-station conductive tube 9 connecting adjacent two spaced contact holders or a power source is provided. In this embodiment, the axial conductor is an inter-station conductive tube 9. It can be seen from Fig. 13 that the inter-venge conducting tube 9 is a one-piece structure, and the number of connecting faces in the conductor is eliminated as compared with the prior art in which the inter-venous conducting tube is composed of a connecting conductor of a transition conductor and a transition conductor. Reduced, the resistance is significantly reduced, and the flow capacity is improved. At the same time, the conductive tube in the interval is a tubular structure, and a through hole is formed in the middle of the conductive tube extending along the length of the gap. On the one hand, the heat dissipation hole can release the heat of the conductive tube in the interval in time; The weight of the conductive tube between the spaces can be reduced, and the moment at which the basin insulator and the electrical connector meet can be further reduced. By adopting the structure of the integrated hollow tube, the heat dissipation performance of the three-phase common box busbar body is improved, the electric resistance is reduced, and the flow capacity of the three-phase common box busbar body is improved.

In this embodiment, an insulating spacer 14 is mounted on the through hole of the through hole at the one end of the contact seat, and the insulating spacer can realize electrical connection between the end of the conductive tube 9 and the electrical connector. Isolation prevents the two from conducting electricity and causing contact overheating. The insulating spacer 14 includes a plug for blocking the conductive tube through the opening of the heat dissipation hole, wherein the outer edge of the plug is provided with a circular arc-shaped insulating spacer protrusion 15 , and at the same time, the conductive tube penetrates the heat dissipation hole at the interval The inner wall of the opening is provided with an inter-port conductive tube groove 13 adapted to the insulating spacer protrusion, and the inter-vening conductive tube groove 13 is also a circular arc-shaped groove. In this embodiment, the insulating spacer protrusion is a snap-fit protrusion, and the gap between the conductive tubes is a snap-fit recess. When installing, the insulating spacer can be directly sealed at one end of the conductive tube at the interval by snapping. In this embodiment, the material of the insulating spacer is polytetrafluoroethylene. In other embodiments, the material of the insulating spacer may be other insulating materials.

In this embodiment, the three-phase interval conductive tube is arranged in an isosceles triangle of a nearly equilateral triangle, the waist length is 324 mm, and the bottom edge is 372 mm, which improves the space utilization ratio of the conductive tube inside the cylinder between the three-phase intervals, and increases the three-phase. The spacing between the conductive tubes between the intervals, thereby directly reducing the electric power between the three-phase spacing between the conductive tubes (the electrical power is inversely proportional to the distance between the three-phase spacing conductive tubes).

In this embodiment, the side of the single-phase accessory mounting flange 2 corresponding to the connected single-phase accessory mounting flange 2 or the docking flange 3 is provided with a trimming edge 11 to increase the welding space, and the cylinder body can be realized. 1 Weld and butt with the single-phase accessory mounting flange 2. Compared with the prior art that must be cast, the quality is easy to control and the yield is high.

The cylinder body 1 is provided with an inspection hole. As can be seen from FIG. 3, the opening position of the inspection hole corresponds to the intersection of the electrical connection body of each phase and the conductive tube between the intervals, and can be used for maintenance and assistance by the operator. installation. A cover mounting flange 10 is provided at the inspection hole, and the cover mounting flange is used for mounting the inspection hole cover 8. In this embodiment, the cover mounting flange is also a neckless plate flange, thereby being capable of The overall outer diameter of the three-phase common box busbar is reduced to meet the design requirements of miniaturized GIS equipment. It can be seen from Fig. 7 that the inner diameter of the plate flange is larger than the diameter of the inspection hole and the single-phase attachment mounting hole. When assembling, the end face of the plate flange close to the cylinder body is inspected by the arc-shaped weld 16 The holes and the single-phase attachment mounting hole walls are welded together to prevent electric field distortion.

Claims

A three-phase common box busbar body, the three-phase common box busbar body comprises a cylinder body, and three single-phase accessory mounting holes are arranged on the cylinder body at an axial interval, and each of the single-phase accessory installations A single-phase accessory mounting flange is disposed at each of the holes, and each of the single-phase accessory mounting flanges is provided with a basin insulator, and the cylinder body is further provided with an electrical connection body electrically connected to the axial conductor. The protruding end of the pot insulator is disposed toward the body of the barrel, and one end of the electrical connector is disposed on an end surface of the convex end of the pot insulator.
The three-phase common box busbar body according to claim 1, wherein the single-phase accessory mounting flange is a neckless plate flange.
The three-phase common box busbar body according to claim 1, wherein the electrical connector is of a unitary structure, and the electrical connector body is provided with an electrical connector extending along a length direction of the electrical connector. Through the cooling holes.
The three-phase common-box busbar cylinder according to claim 2, wherein one end of the electrical connector away from the basin insulator is provided with a contact seat, and the axial conductor is disposed in the contact holder. The integrated inter-port conductive tube is provided with a conductive tube extending along the longitudinal direction of the inter-venge conducting tube through the heat-dissipating hole.
The three-phase common-box busbar cylinder according to claim 4, wherein one end of the inter-venge conducting tube located in the contact holder is provided with a hole that closes the conductive tube through the hole of the heat dissipation hole. Insulating partition.
The three-phase common-box busbar cylinder according to claim 5, wherein an annular snap-in protrusion is disposed on an outer edge of the insulating spacer, and the insulating spacer is disposed in the spacer Correspondingly, the conductive tube penetrates the inner wall of the vent hole and is provided with a snap groove for the snap-fit protrusion to fit.
The three-phase common box busbar body according to claim 1, wherein said single-phase accessory mounting flange is provided with a threaded blind hole for mounting the accessory.
The three-phase common-box busbar cylinder according to claim 4, wherein the cylinder body is provided with a plurality of inspection holes, the opening position of the inspection holes and the electrical connectors of the respective phases Corresponding to the intersection of the conductive tubes at the intervals, each of the inspection holes is provided with a cover mounting flange for mounting the cover plate, and the cover mounting flange is a neckless plate flange.
The three-phase common box busbar body according to claim 8, wherein the plate flange of the single-phase accessory mounting hole and the plate flange of the inspection hole are attached to the cylinder body at the end surface near the center of the cylinder body. On the outer peripheral surface, the apertures of the single-phase attachment mounting hole and the inspection hole are larger than the inner diameter of the plate flange, and the hole wall of the single-phase accessory mounting hole and the hole wall of the inspection hole pass through the arc-shaped fillet weld and the plate flange. The end faces are welded together.
The three-phase common box busbar body according to claim 8, wherein a side of the single-phase accessory mounting flange corresponding to the adjacent single-phase accessory mounting flange is provided with a trimming edge.
The three-phase common box busbar cylinder according to claim 10, wherein the axial ends of the cylinder body are provided with abutting flanges, and the single-phase accessory mounting flanges at the axial ends are on the mating flanges. There is also a trim on one side.
A GIS device, characterized in that the GIS device comprises the three-phase common box busbar body according to any one of claims 1-11.