A main bus connection device for a gas-insulated switchgear

Abstract

The present invention relates to the technical field of gas-insulated switches, and specifically to a main busbar connection device for gas-insulated switchgear, comprising a first tube and a second tube, the first tube and the second tube being transitionally connected via an intermediate disc, the intermediate disc being provided with a placement hole, the placement hole being provided with a conductive post, the first tube being provided with a first busbar, the second tube being provided with a second busbar, the first busbar and the second busbar being connected to the conductive post via a fixing member, the first busbar being provided with a terminal, one side of the terminal being provided with a first embedding groove and the other end being provided with a second embedding groove, the first busbar being provided with a conductive bar disposed in the second embedding groove, one end of the conductive post being embedded in the second embedding groove and connected to the conductive bar; the present invention can conveniently and quickly compress and fix the busbars, and achieve a firm connection.

Description

Technical Field

[0001] The invention belongs to the technical field of gas-insulated switches, and in particular relates to a main busbar connecting device for gas-insulated switchgear. Background Art

[0002] Generally, gas-insulated switchgear is an electrical device installed between the power supply side and the load side of the power system. It protects the power system and load equipment by safely disconnecting the current when the circuit is manually opened and closed under normal current conditions or when abnormal current such as grounding or short circuit occurs in the circuit. This gas-insulated switchgear (GIS) consists of a bushing (Bushing Unit) that receives power from a high-voltage power source, a gas circuit breaker (CB), a circuit breaker (Disconnector Switch), an earthing switch (Earthing Switch), a movable part, a control part, etc.

[0003] The circuit connection in the gas-insulated switchgear is achieved through busbars installed in each pipeline. In the prior art, the busbars between the pipelines are connected to the conductive columns by bolts. Due to space limitations, bolt connections are inconvenient to operate. Therefore, it is necessary to design a connection device that can conveniently fix the busbar ends. Summary of the Invention

[0004] In view of the following technical problems in the prior art: the existing method of fixing the busbar with bolts is too complicated and inconvenient to operate due to limited space.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a main busbar connection device for a gas insulated switchgear, comprising:

[0006] A first tube and a second tube, the first tube and the second tube are transitionally connected through an intermediate disc, the intermediate disc is provided with a placement hole, a conductive column is provided in the placement hole, a first busbar is provided in the first tube, a second busbar is provided in the second tube, the first busbar and the second busbar are both connected to the conductive column through a fixing piece, a wiring terminal is provided on the first busbar, a first embedding groove is provided on one side of the wiring terminal, and a second embedding groove is provided on the other end, a conductive bar is provided in the first busbar and is arranged in the second embedding groove, and one end of the conductive column is embedded in the second embedding groove and connected to the conductive bar.

[0007] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, the fixing part includes a support frame, the support frame includes a base and a vertical plate arranged on the base, a first screw is provided at the bottom of the base, a through-hole is provided on the middle disc, and the first screw is provided in the through-hole.

[0008] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, a first circular hole and a second circular hole are provided on the vertical plate, a first inclined surface is provided at the end of the vertical plate, a first outer arc surface coaxial with the first circular hole is provided at one end of the first inclined surface, and a first concave arc surface is provided at the other end of the first inclined surface.

[0009] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, the fixing member further includes a control rod and a fixing rod, the control rod is connected to the first circular hole, and the fixing rod is connected to the second circular hole; the control rod and the fixing rod are also connected by a connecting rod.

[0010] As a preferred technical solution of the main busbar connection device for gas-insulated switchgear, the control rod is provided with a third circular hole and a fourth circular hole, the third circular hole is connected to the first circular hole via a pin, and the fourth circular hole is connected to the connecting rod via a pin;

[0011] One end of the control rod is also provided with a handle.

[0012] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, a fifth circular hole and a sixth circular hole are provided on the fixing rod, the fifth circular hole is connected to the second circular hole through a pin, and the sixth circular hole is connected to the other end of the connecting rod through a pin.

[0013] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, the distance between the centers of the third circular hole and the fourth circular hole is equal to the distance between the center of the first circular hole and the center of the first concave arc surface; a second outer arc surface coaxial with the fourth circular hole is also provided on one side of the control rod.

[0014] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, an outer curved surface and a second inner concave curved surface are further provided on one side of the control rod, a third outer curved surface is provided on the fixed rod, and an inner concave curved surface is further provided on one side of the fixed rod. The inner concave curved surface is in contact with the outer curved surface, and the second inner concave curved surface is in contact with the third outer curved surface.

[0015] As an optimal technical solution for a main busbar connection device for a gas-insulated switchgear, a first intermediate groove is provided in the control rod, the vertical plate is embedded in the first intermediate groove, and a second intermediate groove is also provided in the fixed rod, the vertical plate is embedded in the second intermediate groove.

[0016] As a preferred technical solution of the main busbar connection device for gas-insulated switchgear, the end of the fixing rod is provided with an extension plate, and the extension plate is provided with a threaded hole;

[0017] It also includes a pressing block, which is embedded in the second embedding groove. The pressing block is provided with a second screw rod, which cooperates with the threaded hole, and the other end of the second screw rod is provided with a screw plate.

[0018] The beneficial effects of the present invention are as follows: the present invention can compact and fix the busbar conveniently and quickly, and the connection is firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0020] Figure 1 Schematic diagram of the overall structure of the gas insulated switch in the present invention;

[0021] Figure 2 Schematic diagram of the connection structure of the first busbar and the second busbar in the present invention;

[0022] Figure 3 Schematic diagram of the cross-sectional structure of the connection between the terminal and the conductive column in the present invention;

[0023] Figure 4 Schematic diagram of the connection structure between the first busbar and the conductive column in the present invention;

[0024] Figure 5 Schematic diagram of the structure of the support frame in the present invention;

[0025] Figure 6 Schematic diagram of the structure of the fixing member in the present invention in the open state;

[0026] Figure 7 Schematic diagram of the structure of the control rod in the present invention;

[0027] Figure 8 Schematic diagram of the structure of the fixing rod in the present invention;

[0028] Figure 9 Schematic diagram of the transition state structure of the fixing member in the present invention;

[0029] Figure 10 It is a schematic diagram of the three-dimensional connection structure between the terminal and the conductive column in the present invention.

[0030] Figure numerals: 100, first tube; 101, first busbar; 102, terminal; 102a, first embedded groove; 102b, second embedded groove; 103, conductive bar; 200, second tube; 201, second busbar; 300, middle disk; 301, placement hole; 302, conductive column; 303, through-hole; 400, fixing member; 401, support frame; 401a, base; 401b, vertical plate; 401c, first screw; 401d, first circular hole; 401e, second circular hole; 401f, first inclined surface; 401g, first outer arc surface; 401h, first inner concave Arc surface; 402, control rod; 402a, third circular hole; 402b, fourth circular hole; 402c, second outer arc surface; 402d, outer curved surface; 402e, second concave arc surface; 402f, first middle groove; 402g, handle; 403, fixing rod; 403a, fifth circular hole; 403b, sixth circular hole; 403c, third outer arc surface; 403d, concave curved surface; 403e, second middle groove; 403f, extension plate; 403g, threaded hole; 403h, side plate; 404, connecting rod; 405, pressure block; 405a, second screw; 405b, screw plate. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included. Example

[0035] Reference Figures 1 to 10This embodiment provides a main busbar connection device for a gas-insulated switchgear, including a first tube 100 and a second tube 200. The first tube 100 and the second tube 200 are transitionally connected via an intermediate disk 300. The intermediate disk 300 is provided with a placement hole 301, and a conductive post 302 is provided in the placement hole 301. The first tube 100 is provided with a first busbar 101, and the second tube 200 is provided with a second busbar 201. The first busbar 101 and the second busbar 201 are both connected to the conductive post 302 via a fixing member 400. The first busbar 101 is provided with a terminal 102, and the terminal 102 has a first embedding groove 102a on one end and a second embedding groove 102b on the other end. The first busbar 101 is provided with a conductive bar 103 disposed in the second embedding groove 102b. One end of the conductive post 302 is embedded in the second embedding groove 102b and connected to the conductive bar 103.

[0036] The second busbar 201 is also provided with a terminal at its end, which is disposed in the second tube 200 and connected to the other end of the conductive post 302 .

[0037] In this embodiment, the middle disc 300 is a structure that transitionally connects the first tube 100 and the second tube 200, and the conductive column 302 is a structure that transitionally connects the first busbar 101 and the second busbar 201. The first busbar 101 and the second busbar 201 have different structures depending on their positions, but both are provided with conductive bars inside and have terminal terminals 102 at their ends for connection to the conductive columns 302. The terminal terminals 102 are locked and fixed by fixing members 400.

[0038] Furthermore, the fixing member 400 includes a support frame 401, which includes a base 401a and a vertical plate 401b arranged on the base 401a. A first screw 401c is arranged at the bottom of the base 401a, and a through hole 303 is arranged on the middle disk 300, and the first screw 401c is arranged in the through hole 303.

[0039] The base 401a can also be fixed to the middle disk 300 by welding or other means, and the support frame 401 can be kept fixed by setting a pair of first screws 401c and a pair of through holes 303. It should be noted that the outer side surface of the base 401a is an arc surface with the same size as the side protrusion of the middle disk 300. Therefore, the first screw 401c is set in the through hole 303, and the base 401a is limited by the side protrusion of the middle disk 300 to keep the base 401a fixed.

[0040] The base 401a is fixed by means of a first screw rod through a bolt connection.

[0041] Preferably, the base 401a is fixed to the middle disk 300 by welding.

[0042] A first circular hole 401d and a second circular hole 401e are provided on the vertical plate 401b, and a first inclined surface 401f is provided at the end of the vertical plate 401b. One end of the first inclined surface 401f is provided with a first outer arc surface 401g coaxial with the first circular hole 401d, and the other end of the first inclined surface 401f is provided with a first concave arc surface 401h.

[0043] Furthermore, the fixing member 400 further includes a control rod 402 and a fixing rod 403 . The control rod 402 is connected to the first circular hole 401 d , and the fixing rod 403 is connected to the second circular hole 401 e . The control rod 402 and the fixing rod 403 are further connected via a connecting rod 404 .

[0044] The control rod 402 is provided with a third circular hole 402a and a fourth circular hole 402b. The third circular hole 402a is connected to the first circular hole 401d via a pin, and the fourth circular hole 402b is connected to the connecting rod 404 via a pin.

[0045] One end of the control rod 402 is further provided with a handle 402g.

[0046] It should be noted that the connecting rod 404 is a straight plate structure with two circular holes. One circular hole is connected to the fourth circular hole of the control rod 402 through a pin, and the other circular hole is connected to the sixth circular hole 403b of the fixed rod 403 through a pin.

[0047] The fixing rod 403 is provided with a fifth circular hole 403a and a sixth circular hole 403b. The fifth circular hole 403a is connected to the second circular hole 401e via a pin, and the sixth circular hole 403b is connected to the other end of the connecting rod 404 via a pin.

[0048] The distance between the centers of the third circular hole 402a and the fourth circular hole 402b is equal to the distance between the centers of the first circular hole 401d and the first concave arc surface 401h. A second outer arc surface 402c coaxial with the fourth circular hole 402b is also provided on one side of the control rod 402.

[0049] This allows the control rod 402 to rotate around the first circular hole 401d during the rotation process, and the corresponding pin shaft at the second outer arc surface 402c or the fourth circular hole 402b can be embedded in the first concave arc surface 401h. In this embodiment, the corresponding pin shaft at the fourth circular hole 402b is embedded in the first concave arc surface 401h.

[0050] An outer curved surface 402d and a second inner concave curved surface 402e are further provided on one side of the control rod 402, a third outer curved surface 403c is provided on the fixed rod 403, and an inner concave curved surface 403d is further provided on one side of the fixed rod 403. The inner concave curved surface 403d is in contact with the outer curved surface 402d, and the second inner concave curved surface 402e is in contact with the third outer curved surface 403c.

[0051] The control rod 402 is provided with a first middle groove 402f, and the vertical plate 401b is embedded in the first middle groove 402f. The fixed rod 403 is further provided with a second middle groove 403e, and the vertical plate 401b is embedded in the second middle groove 403e.

[0052] The control rod 402 and the fixed rod 403 have the same thickness, and the first middle groove 402f and the second middle groove 403e have the same thickness and correspond to each other in position.

[0053] The control rod 402, the fixing rod 403 and the connecting rod 404 are all hard structures.

[0054] An extension plate 403f is provided at the end of the fixing rod 403, and a threaded hole 403g is provided on the extension plate 403f;

[0055] The pressing block 405 is further included. The pressing block 405 is embedded in the second embedding groove 102b. A second screw rod 405a is provided on the pressing block 405. The second screw rod 405a cooperates with the threaded hole 403g. A screw plate 405b is provided at the other end of the second screw rod 405a.

[0056] Side plates 403h may be provided at both ends of the extension plate 403f. The side plates 403h are also provided with two threaded holes, both of which are connected to a pressure block 405. The side plates 403h enable one fixing member 400 to control two first busbars 101, saving space.

[0057] In this embodiment, Figure 6 The structure of the fixing rod 403 with the side plate 403h is shown. Figure 4 The diagram shows a state where the fixing rod 403 compresses and fixes the two first busbars 101 .

[0058] Specifically, refer to Figure 6 The fixing member 400 is in the expanded state. After the first busbar 101 is connected to the conductive column 302, the handle 402g is held to move the control rod 402, and the control rod 402 rotates around the first circular hole 401d. The control rod 402 drives the connecting rod 404 to rotate, and the connecting rod 404 drives the fixing rod 403 to rotate around the second circular hole 401e. Therefore, the fixing rod 403 drives the extension plate 403f and the pressure block 405 to press down together.

[0059] When the fixing member 400 is in Figure 9 In this state, the first circular hole 401d, the fourth circular hole 402b, and the sixth circular hole 403b are collinear. Without screwing the screw plate 405b, the pressing block 405 is at the lowest point. If the control rod 402 is continuously rotated, the fourth circular hole 402b will continue to move downward, while the pressing block 405 moves upward, until the pin at the fourth circular hole 402b is embedded in the first concave arc surface 401h and reaches the locked position, i.e. Figure 4State, at this time, the concave curved surface 403d is in contact with the outer curved surface 402d, and the third outer curved surface 403c is embedded in the second concave curved surface 402e. At this time, the screw plate 405b is screwed to press the pressure block 405 tightly into the second embedding groove 102b. At this time, since the pin at the fourth circular hole 402b is confined in the first concave curved surface 401h, the fixing member 400 is locked as a whole, and the terminal 102 and the conductive column 302 are fixed.

[0060] When disassembly is required, the pressing block 405 is loosened, and the entire state of the fixing member 400 can be released by pulling back the control rod 402 .

[0061] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A main busbar connection device for a gas-insulated switchgear, characterized in that: include, A first tube (100) and a second tube (200), wherein the first tube (100) and the second tube (200) are transitionally connected via an intermediate disk (300), wherein a placement hole (301) is provided on the intermediate disk (300), wherein a conductive column (302) is provided in the placement hole (301), wherein a first busbar (101) is provided in the first tube (100), wherein a second busbar (201) is provided in the second tube (200), wherein the first busbar (101) and the second busbar (202) are connected. 01) are connected to the conductive column (302) through a fixing member (400), a terminal (102) is provided on the first busbar (101), a first embedding groove (102a) is provided on one side of the terminal (102), and a second embedding groove (102b) is provided on the other end, a conductive bar (103) is provided in the first busbar (101) and is provided in the second embedding groove (102b), and one end of the conductive column (302) is embedded in the second embedding groove (102b) and connected to the conductive bar (103); The fixing member (400) comprises a support frame (401), the support frame (401) comprises a base (401a) and a vertical plate (401b) arranged on the base (401a), a first screw rod (401c) is arranged at the bottom of the base (401a), a through hole (303) is provided on the middle disc (300), and the first screw rod (401c) is arranged in the through hole (303); The vertical plate (401b) is provided with a first circular hole (401d) and a second circular hole (401e); the end of the vertical plate (401b) is provided with a first inclined surface (401f); one end of the first inclined surface (401f) is provided with a first outer arc surface (401g) coaxial with the first circular hole (401d); and the other end of the first inclined surface (401f) is provided with a first concave arc surface (401h); The fixing member (400) further comprises a control rod (402) and a fixing rod (403), wherein the control rod (402) is connected to the first circular hole (401d), and the fixing rod (403) is connected to the second circular hole (401e); the control rod (402) and the fixing rod (403) are further connected via a connecting rod (404); The control rod (402) is provided with a third circular hole (402a) and a fourth circular hole (402b); the third circular hole (402a) is connected to the first circular hole (401d) via a pin, and the fourth circular hole (402b) is connected to the connecting rod (404) via a pin; One end of the control rod (402) is further provided with a handle (402g).

2. The main busbar connection device for gas-insulated switchgear according to claim 1, characterized in that: The fixing rod (403) is provided with a fifth circular hole (403a) and a sixth circular hole (403b); the fifth circular hole (403a) is connected to the second circular hole (401e) via a pin, and the sixth circular hole (403b) is connected to the other end of the connecting rod (404) via a pin.

3. The main busbar connection device for gas-insulated switchgear according to claim 2, characterized in that: The distance between the centers of the third circular hole (402a) and the fourth circular hole (402b) is equal to the distance between the centers of the first circular hole (401d) and the first concave arc surface (401h); and a second outer arc surface (402c) coaxial with the fourth circular hole (402b) is further provided on one side of the control rod (402).

4. The main busbar connection device for gas-insulated switchgear according to claim 3, characterized in that: One side of the control rod (402) is further provided with an outer curved surface (402d) and a second inner concave curved surface (402e); the fixing rod (403) is provided with a third outer curved surface (403c); one side of the fixing rod (403) is further provided with an inner concave curved surface (403d); the inner concave curved surface (403d) is fitted with the outer curved surface (402d); and the second inner concave curved surface (402e) is fitted with the third outer curved surface (403c).

5. The main busbar connection device for gas-insulated switchgear according to claim 4, characterized in that: The control rod (402) is provided with a first intermediate groove (402f), and the vertical plate (401b) is embedded in the first intermediate groove (402f). The fixed rod (403) is also provided with a second intermediate groove (403e), and the vertical plate (401b) is embedded in the second intermediate groove (403e).

6. The main busbar connection device for gas-insulated switchgear according to claim 5, characterized in that: An extension plate (403f) is provided at the end of the fixing rod (403), and a threaded hole (403g) is provided on the extension plate (403f); It also includes a pressing block (405), the pressing block (405) is embedded in the second embedding groove (102b), a second screw rod (405a) is provided on the pressing block (405), the second screw rod (405a) cooperates with the threaded hole (403g), and a screw plate (405b) is provided at the other end of the second screw rod (405a).

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