GIS electrical accessory connection structure

Abstract

The invention discloses a GIS (Gas Insulated Switchgear) electrical accessory connecting structure, which is used for transitionally connecting an isolating switch and a circuit breaker on a double-bus side, and comprises a first conducting rod, one end of the first conducting rod is electrically connected with an isolating switch contact seat on any bus side, and the other end part of the first conducting rod is provided with a first connecting table; a mounting groove is formed in the middle of the outer side wall of the first conducting rod; one end of the second conducting rod is electrically connected with the isolating switch contact seat on the other bus side, and the other end part of the second conducting rod is provided with a second connecting table; the connecting bridge plate is detachably connected with the first connecting table and the second connecting table; one end of the third conducting rod is in sliding connection with a contact seat of the circuit breaker, and the other end of the third conducting rod is detachably connected to a mounting groove of the first conducting rod. And the isolating switch or the circuit breaker on the corresponding side can be removed and overhauled without influencing the normal through-flow of the bus on the other bus side.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bus connection of gas insulated switchgear, and particularly relates to a GIS electrical accessory connection structure. BACKGROUND

[0002] The gas insulated switchgear (GIS) is one of the most important power transmission and distribution devices. With the progress of power technology and the rapid development of the national economy, the power outage problem caused by the maintenance of GIS power stations is increasingly prominent, and the demand for maintenance without power outage is increasing in the domestic market.

[0003] At present, the conventional double-bus reserved interval of GIS is that the conductive components of GIS are packaged in a metal shell, and there is usually no independent buffer unit between the two groups of bus side disconnectors and between the circuit breaker and the bus side disconnector. When any one of the bus side disconnectors or the circuit breaker needs to be repaired, the intermediate conductor needs to be disassembled, and the whole station needs to be powered off to carry out the repair work. However, the power-off coordination is difficult, which seriously affects the orderly progress of the power station maintenance work. The power-off period during the maintenance process is long, and the users will suffer great economic losses during the power-off period.

[0004] Therefore, how to provide a GIS electrical accessory connection structure that does not need to power off the whole station when repairing the electrical accessory is a problem that those skilled in the art need to solve. SUMMARY

[0005] Therefore, the application provides a GIS electrical accessory connection structure, which can realize the function of not powering off one bus during the process of repairing any one of the bus side disconnectors or the circuit breaker, thereby bringing great convenience to the expansion and maintenance work of the power station and avoiding the power-off loss of the users.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme: a GIS electrical accessory connection structure for transitionally connecting the disconnectors and the circuit breaker on the two bus sides, comprising: a first conductive rod, one end of the first conductive rod being electrically connected to the disconnector contact seat on the bus side, the other end of the first conductive rod being provided with a first connecting table, and a mounting groove being arranged in the middle of the outer wall of the first conductive rod; a second conductive rod, one end of the second conductive rod being electrically connected to the disconnector contact seat on the other bus side, and the other end of the second conductive rod being provided with a second connecting table; a connecting bridge plate, the connecting bridge plate being detachably connected to the first connecting table and the second connecting table and realizing the flow-through of the first conductive rod and the second conductive rod; A third conductive rod, one end of the third conductive rod is slidably connected to the contact seat of the circuit breaker, the other end of the third conductive rod is detachably connected to the mounting groove of the first conductive rod, when the disconnecting switch or the circuit breaker is overhauled, the connecting bridge plate is disassembled and the connection relationship between the first conductive rod and the third conductive rod is released, the corresponding side disconnecting switch or circuit breaker is removed and overhauled, and the busbar on the other side normally flows.

[0007] The beneficial technical effect of the present application is that the disconnecting switches and circuit breakers on the two busbar sides are connected by the split first conductive rod, the second conductive rod, the third conductive rod and the connecting bridge plate, when the disconnecting switch on one side is overhauled, the connecting bridge plate is disassembled, the connection relationship between the first conductive rod and the third conductive rod is released, the third conductive rod is pressed into the corresponding circuit breaker contact seat, the corresponding disconnecting switch and the corresponding conductive rod are removed and overhauled, and the disconnecting switch on the other busbar side is not moved, that is, the busbar on this side does not need to be powered off, and normal work is maintained, thereby avoiding the possibility of power off of the whole station and reducing economic loss. Preferably, a plurality of screw holes are arranged on the first connecting table, a plurality of screw holes are arranged on the second connecting table, and a plurality of bolts are connected to the two ends of the connecting bridge plate and the connecting bridge plate is connected to the first connecting table and the second connecting table through the bolts.

[0008] The technical effect generated thereby is that the connecting bridge plate realizes the disassembly relationship with the first connecting table and the second connecting table through the bolts, and further realizes the connection and overcurrent of the first conductive rod and the second conductive rod.

[0009] Preferably, a connecting hole penetrating through the outer side wall of the first conductive rod is arranged at the groove bottom of the mounting groove, the other end of the third conductive rod is provided with a threaded blind hole, and a connecting bolt is coaxially connected in the connecting hole and the threaded blind hole, and the other end of the third conductive rod is embedded in the mounting groove and connected through the connecting bolt.

[0010] The technical effect generated thereby is that the first conductive rod realizes the detachable connection with the third conductive rod through the connecting bolt, and provides the possibility for subsequent independent disassembly of the circuit breaker.

[0011] Preferably, a counterbore is arranged on the outer side wall of the first conductive rod, and the counterbore is coaxially communicated with the connecting hole.

[0012] The technical effect generated thereby is that the counterbore provides a position for the head of the connecting bolt, and improves the integrity of the split conductive rod connection.

[0013] Preferably, the protection shell is further connected between the disconnecting switches on the two busbar sides, flange interfaces for abutting the disconnecting switch seats are arranged at the two end sides of the protection shell, an overhauling opening is arranged at the top side of the protection shell, and an interface for connecting the circuit breaker is arranged at the bottom side of the protection shell.

[0014] The resulting technical effect is that the protective casing provides insulation protection for the conductive rod and also makes subsequent maintenance possible.

[0015] Preferably, the connecting bridge plate is a block of conductive material.

[0016] The resulting technical effect is that, in practical implementation, the materials of the connecting bridge plate and the conductive rod should be as consistent as possible to reduce the current-carrying resistance.

[0017] Preferably, the other end of the first conductive rod abuts against the other end of the second conductive rod, and the outer surface of the connecting bridge plate is an arc surface that matches the outer contour shape of the first and second conductive rods. When the connecting bridge plate is connected to the first connecting platform and the second connecting platform, the outer wall of the connecting bridge plate transitions parallel to the outer surface of the first and second conductive rods.

[0018] The resulting technical effect is that when the connecting bridge plate is connected, its arc surface matches the outer surface of the conductive rod, thereby improving the overall performance of the split conductive rod after connection. Attached Figure Description

[0019] Fig. 1 This is an overall schematic diagram of a GIS electrical accessory connection structure according to the present invention; Fig. 2 This is a schematic diagram of the maintenance status of a GIS electrical accessory connection structure according to the present invention; Fig. 3 This is a schematic diagram of the connection bridge plate of a GIS electrical accessory connection structure according to the present invention; Fig. 4 This is a schematic diagram of the connection between the conductive rod and the protective shell in a GIS electrical accessory connection structure according to the present invention.

[0020] 1. Disconnecting switch; 11. Disconnecting switch contact base; 2. First conductive rod; 3. First connecting platform; 4. Mounting groove; 5. Second conductive rod; 6. Second connecting platform; 7. Connecting bridge plate; 8. Third conductive rod; 9. Connecting bolt; 10. Protective housing; 101. Flange interface; 102. Inspection port. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See the appendix of this invention. Figs. 1 to 4According to an embodiment of the present invention, a GIS electrical accessory connection structure is used for transitional connection of a disconnecting switch 1 and a circuit breaker on the double busbar side. It includes: a first conductive rod 2, one end of the first conductive rod 2 is electrically connected to the disconnecting switch contact seat 11 on any busbar side, the other end of the first conductive rod 2 is provided with a first connecting platform 3, and the middle of the outer side wall of the first conductive rod 2 is provided with an installation groove 4. The second conductive rod 5 has one end electrically connected to the disconnector contact seat 11 on the other busbar side, and the other end of the second conductive rod 5 is provided with a second connecting platform 6; Connect bridge plate 7, connect the first connecting platform 3 and the second connecting platform 6 to realize the current flow between the first conductive rod 2 and the second conductive rod 5; The third conductive rod 8 has one end slidably connected to the contact seat of the circuit breaker, and the other end of the third conductive rod 8 is detached and connected to the mounting groove 4. When inspecting the disconnecting switch or circuit breaker, the connecting bridge plate 7 is disassembled and the connection relationship between the first conductive rod 2 and the third conductive rod 8 is released. The disconnecting switch 1 or circuit breaker on the corresponding side is removed and inspected. The busbar on the other side is normally carrying current. In other embodiments, the first connecting platform 3 is provided with a plurality of screw holes, the second connecting platform 6 is provided with a plurality of screw holes, and the two ends of the connecting bridge plate 7 are connected with a plurality of bolts, and the connecting bridge plate 7 is connected to the first connecting platform 3 and the second connecting platform 6 by means of bolts.

[0023] In some other specific embodiments, the bottom of the mounting groove 4 is provided with a connecting hole that penetrates the outer wall of the first conductive rod 2, and the other end of the third conductive rod 8 is provided with a threaded blind hole. A connecting bolt 9 is coaxially connected in the connecting hole and the threaded blind hole. The other end of the third conductive rod 8 is embedded in the mounting groove 4 and connected by the connecting bolt 9.

[0024] In some other embodiments, the outer wall of the first conductive rod 2 is provided with a countersunk hole, which is coaxially connected with the connecting hole, and the countersunk hole provides a hidden clearance for the head of the connecting bolt.

[0025] In some other specific embodiments, a protective housing 10 is also included. The protective housing 10 is connected between the disconnecting switches 1 on the double busbar side. Flange interfaces 101 for docking with disconnecting switch seats are provided on both ends of the protective housing 10. An inspection port 102 is provided on the top side of the protective housing 10. An interface for connecting the circuit breaker is provided on the bottom side of the protective housing 10. Due to space limitations, a flange pipe can be added between the protective housing and the circuit breaker for transition.

[0026] In practice, the connecting bridge plate 7 is made of a conductive material block, and its material should be as similar as possible to that of the conductive rod.

[0027] During assembly, the other end of the first conductive rod 2 abuts against the other end of the second conductive rod 5. The outer side of the connecting bridge plate 7 is an arc surface that matches the outer contour shape of the first and second conductive rods. When the connecting bridge plate 7 is connected to the first connecting platform 3 and the second connecting platform 6, the outer side wall of the connecting bridge plate 7 transitions parallel to the outer side of the first conductive rod 2 and the second conductive rod 5, thus achieving strong integrity.

[0028] When this product is used for maintenance of disconnect switches or circuit breakers, only the power needs to be cut off in the corresponding bay. The busbar above the three working positions in this bay can remain in operation, avoiding the need to operate the insulating plates of the disconnect switches on both busbar sides. This allows for uninterrupted power supply to the busbars on the insulator side without the need to operate the insulators, effectively reducing the economic losses to users caused by operation and maintenance.

[0029] Specific maintenance steps: Loosen the connecting bolts between the first and third conductive rods, and use tools to press the third conductive rod into the circuit breaker contact seat; loosen the bolts on the connecting bridge plate, and remove the connecting bridge plate from the first and second connecting platforms; de-energize the busbar on the maintenance side, and remove the first or second conductive rod along with the contact seat of the disconnecting switch under maintenance from the housing. This device can electrically isolate the faulty part by disconnecting the conductor without de-energizing a busbar, enabling the maintenance and replacement of the faulty switch, while allowing the non-faulty parts to continue operating, thereby reducing economic losses.

[0030] The apparatus and methods disclosed in the embodiments are described in a relatively simple manner since they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the description in the method section.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A GIS electrical accessory connection structure for transitional connection of a disconnecting switch (1) and a circuit breaker on a double busbar side, characterized in that, include: The first conductive rod (2) has one end electrically connected to the disconnect switch contact seat (11) on any busbar side, and the other end of the first conductive rod (2) is provided with a first connecting platform (3). The middle part of the outer side wall of the first conductive rod (2) is provided with an installation groove (4). The second conductive rod (5) has one end electrically connected to the disconnecting switch contact seat (11) on the other busbar side, and the other end of the second conductive rod (5) is provided with a second connecting platform (6). Connecting bridge plate (7), the connecting bridge plate (7) detachably connects the first connecting platform (3) and the second connecting platform (6) and realizes the current flow between the first conductive rod (2) and the second conductive rod (5); The third conductive rod (8) has one end slidably connected to the contact seat of the circuit breaker, and the other end of the third conductive rod (8) is disassembled and connected to the mounting groove (4). When inspecting the disconnecting switch or circuit breaker, the connecting bridge plate (7) is disassembled and the connection relationship between the first conductive rod (2) and the third conductive rod (8) is released. The disconnecting switch (1) or circuit breaker on the corresponding side is removed and inspected. The busbar on the other side is normally connected.

2. The GIS electrical accessory connection structure according to claim 1, characterized in that, The first connecting platform (3) is provided with multiple screw holes, the second connecting platform (6) is provided with multiple screw holes, and the two ends of the connecting bridge plate (7) are connected with multiple bolts, and the connecting bridge plate (7) is connected to the first connecting platform (3) and the second connecting platform (6) through the bolts.

3. The GIS electrical accessory connection structure according to claim 1, characterized in that, The bottom of the mounting groove (4) is provided with a connecting hole that penetrates the outer wall of the first conductive rod (2). The other end of the third conductive rod (8) is provided with a threaded blind hole. A connecting bolt (9) is coaxially connected in the connecting hole and the threaded blind hole. The other end of the third conductive rod (8) is embedded in the mounting groove (4) and connected through the connecting bolt (9).

4. The GIS electrical accessory connection structure according to claim 3, characterized in that, The outer wall of the first conductive rod (2) is provided with a countersunk hole, which is coaxially connected with the connecting hole.

5. The GIS electrical accessory connection structure according to claim 1, characterized in that, It also includes a protective housing (10), which is connected between the disconnecting switches (1) on the double busbar side. The protective housing (10) has flange interfaces (101) for docking with the disconnecting switch seats on both ends. The protective housing (10) has an inspection port (102) on the top side and an interface for connecting the circuit breaker on the bottom side.

6. The GIS electrical accessory connection structure according to claim 1, characterized in that, The connecting bridge plate (7) is a conductive material block.

7. The GIS electrical accessory connection structure according to claim 1, characterized in that, The other end of the first conductive rod (2) abuts against the other end of the second conductive rod (5). The outer side of the connecting bridge plate (7) is an arc surface that matches the outer contour shape of the first conductive rod and the second conductive rod. When the connecting bridge plate (7) is connected to the first connecting platform (3) and the second connecting platform (6), the outer side wall of the connecting bridge plate (7) transitions parallel to the outer side of the first conductive rod (2) and the second conductive rod (5).

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