Telescopic wire clamp for flexible bus of substation

Abstract

The invention relates to the technical field of substation primary equipment, in particular to a telescopic wire clamp for a substation flexible bus, which comprises a telescopic wire clamp main body, and the interior of the telescopic wire clamp main body is connected with the flexible bus; the telescopic wire clamp main body comprises a terminal board, the interior of the terminal board is connected with a telescopic tube assembly, the other side of the telescopic tube assembly is connected with the interior of a wiring board, the interior of the telescopic tube assembly is provided with a flexible bus, and the exterior of the terminal board is connected with the exterior of the wiring board through a conductive band; the telescopic tube assembly comprises a telescopic inner tube and a telescopic outer tube, the outer side of the telescopic inner tube is slidably connected with the telescopic outer tube, a telescopic spring is installed between the telescopic inner tube and the telescopic outer tube, one side of the telescopic inner tube is fixedly connected with a terminal board, and one side of the telescopic outer tube is fixedly connected with a wiring board. The telescopic wire clamp provided by the invention can be mounted at the joint of the high-voltage isolation switch and the flexible bus, so that the problem that the sag of the flexible bus is changed due to the deformation of a foundation is relieved, and the non-planned shutdown frequency of a transformer substation is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of primary equipment in substations, and more particularly to a telescopic clamp for flexible busbars in substations. Background Technology

[0002] Currently, the electrical fittings used in outdoor substations to connect flexible busbars to primary equipment such as high-voltage disconnect switches and circuit breakers are SLG type equipment clamps. The SLG type equipment clamp consists of two aluminum plates connected together. One side is a terminal block that connects to the flexible busbar, and the other side is a connecting plate. The connecting plate can be made of copper and aluminum plates and is connected to the equipment body.

[0003] For substations in frigid regions, the freezing heave of the ground during spring and winter causes changes in the foundations of outdoor primary equipment, resulting in variations in the sag of the flexible busbars. This can pull on the primary equipment or cause excessive sag. Since these clamps are already solidified after manufacturing, they cannot alleviate the conductor sag problem, thus threatening the stable operation of the primary equipment in the substation. Therefore, to address these shortcomings, a telescopic clamp for substation flexible busbars is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a telescopic clamp for substation flexible busbars to overcome the problem in the prior art where changes in the foundation of outdoor primary equipment in substations due to weather conditions lead to changes in the sag of the flexible busbars, and even threaten the stable operation of primary equipment inside the substation.

[0005] To achieve the above objectives, the present invention provides a telescopic clamp for a substation flexible busbar, comprising: A telescopic clamp body, wherein a flexible busbar is internally connected to the telescopic clamp body; The telescopic clamp body includes a terminal plate, the inside of which is connected to a telescopic tube assembly, the other side of which is connected to the inside of a wiring board, a flexible busbar is installed inside the telescopic tube assembly, and the outside of the terminal plate is connected to the outside of the wiring board via a conductive strip. The telescopic tube assembly includes a telescopic inner tube and a telescopic outer tube. The telescopic outer tube is slidably connected to the outside of the telescopic inner tube. A telescopic spring is installed between the telescopic inner tube and the telescopic outer tube. A terminal plate is fixedly connected to one side of the telescopic inner tube, and a wiring plate is fixedly connected to one side of the telescopic outer tube. The telescopic inner tube and the telescopic outer tube are controlled to extend and retract by the telescopic spring. The telescopic inner tube and the telescopic outer tube are controlled to extend and retract by sliding.

[0006] Preferably, the outer diameter of the telescopic inner tube is adapted to the inner diameter of the telescopic outer tube.

[0007] Preferably, the telescopic distance is the elongation distance and the contraction distance between the telescopic inner tube and the telescopic outer tube.

[0008] Preferably, the telescopic distance includes multiple distance states, namely a first distance state, a second distance state, and a variant distance state. The first distance state is a fixed distance, the second distance state is a fixed distance, and the variant distance state is a variable distance. The distance in the first distance state is greater than the distance in the second distance state, the distance in the variant distance state is less than the distance in the first distance state, and the distance in the variant distance state is greater than the distance in the second distance state.

[0009] Preferably, the first distance state is the maximum sliding distance between the telescopic inner tube and the telescopic outer tube, and the length of the first distance state is the sum of the length of the telescopic inner tube and the length of the telescopic outer tube.

[0010] Preferably, the second distance state is the minimum sliding distance between the telescopic inner tube and the telescopic outer tube, and the length of the second distance state is the length of the telescopic inner tube or the length of the telescopic outer tube.

[0011] Preferably, the length of the telescopic inner tube is adapted to the length of the telescopic outer tube.

[0012] Preferably, the variant distance state is the varying distance of sliding between the telescopic inner tube and the telescopic outer tube, and the length of the variant distance state is between the length of the second distance state and the length of the first distance state.

[0013] Preferably, the telescopic inner tube is provided with a sliding groove on its outside, the length of the telescopic inner tube is adapted to the length of the sliding groove, and the telescopic inner tube is connected to the telescopic outer tube through the sliding groove.

[0014] Preferably, a watch strap finger and a positioning pin are installed on one side of the inside of the telescopic outer tube, and the positioning pin is located on one side of the watch strap finger.

[0015] Preferably, a terminal board mounting hole is provided on one side of the terminal board, a wiring board mounting hole is provided on one side of the wiring board, and a conductive strip is installed between the terminal board mounting hole and the wiring board mounting hole.

[0016] The present invention has the following beneficial effects: The telescopic clamp for substation flexible busbars provided by this invention can be installed at the connection between the high-voltage disconnector and the flexible busbar. It not only alleviates the problem of changes in the sag of the flexible busbar caused by foundation deformation, thereby reducing the number of unplanned outages of the substation, but also prevents overheating after long-term operation. Its expansion rate and rated current can be adjusted according to the actual conditions of different regions and substations. Attached Figure Description

[0017] Figure 1 This is an exploded view of a telescopic clamp for a flexible busbar in a substation, according to an embodiment of the present invention. Figure 2This is a schematic diagram of the structure of the telescopic clamp for the flexible busbar in the substation according to an embodiment of the present invention.

[0018] Legend: 1-Terminal plate; 2-Telescopic inner tube; 3-Telescopic spring; 4-Connecting board; 5-Telescopic outer tube; 6-Watch strap contact finger; 7-Slide groove; 8-Positioning pin; 9-Terminal plate mounting hole; 10-Connecting board mounting hole; 11-Telescopic clamp body. Detailed Implementation

[0019] 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.

[0020] Figure 1 This is an exploded view of a telescopic clamp for a substation flexible busbar according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the telescopic clamp for the flexible busbar in a substation according to an embodiment of the present invention. Figures 1 to 2 As shown, the present invention provides a telescopic clamp for a substation flexible busbar, comprising: Telescopic clamp body 11, the telescopic clamp body 11 is internally connected to a flexible busbar; The telescopic clamp body 11 includes a terminal plate 1, the inside of which is connected to a telescopic tube assembly, the other side of which is connected to the inside of a terminal block 4, a flexible busbar is installed inside the telescopic tube assembly, and the outside of the terminal plate 1 is connected to the outside of the terminal block 4 via a conductive strip. The telescopic tube assembly includes a telescopic inner tube 2 and a telescopic outer tube 5. The telescopic outer tube 5 is slidably connected to the outside of the telescopic inner tube 2. A telescopic spring 3 is installed between the telescopic inner tube 2 and the telescopic outer tube 5. A terminal plate 1 is fixedly connected to one side of the telescopic inner tube 2, and a wiring plate 4 is fixedly connected to one side of the telescopic outer tube 5. The telescopic inner tube 2 and the telescopic outer tube 5 are controlled to extend and retract by the telescopic spring 3, and the telescopic distance of the telescopic inner tube 2 and the telescopic outer tube 5 is controlled by sliding.

[0021] In this telescopic clamp, the outer diameter of the telescopic inner tube 2 is adapted to the inner diameter of the telescopic outer tube 5, and the length of the telescopic inner tube 2 is adapted to the length of the telescopic outer tube 5.

[0022] In practical applications, the telescopic distance is the sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5. The telescopic distance includes multiple distance states, namely a first distance state, a second distance state, and a variant distance state. The first distance state is a fixed distance, the second distance state is a fixed distance, and the variant distance state is a variable distance. The distance in the first distance state is greater than the distance in the second distance state, the distance in the variant distance state is less than the distance in the first distance state, and the distance in the variant distance state is greater than the distance in the second distance state.

[0023] In this telescopic clamp, the first distance state is the maximum sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the first distance state is the sum of the lengths of the telescopic inner tube 2 and the telescopic outer tube 5; the second distance state is the minimum sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the second distance state is either the length of the telescopic inner tube 2 or the length of the telescopic outer tube 5; the variant distance state is the varying sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the variant distance state is between the length of the second distance state and the length of the first distance state.

[0024] In practical applications, the telescopic inner tube 2 is provided with a sliding groove 7 on its outside. The length of the telescopic inner tube 2 is adapted to the length of the sliding groove 7. The telescopic inner tube 2 is connected to the telescopic outer tube 5 through the sliding groove 7. The telescopic spring 3 is installed inside the telescopic inner tube 2. The watch strap finger 6 and the positioning pin 8 are installed on one side inside the telescopic outer tube 5. The positioning pin 8 is located on the outside of the watch strap finger 6. In other words, the watch strap finger 6 and the positioning pin 8 are installed between the telescopic inner tube 2 and the telescopic outer tube 5.

[0025] It should be noted that after the telescopic clamp is assembled, the telescopic outer tube 5 has a wiring plate 4 and a terminal plate 1 on both sides. The telescopic outer tube 5 is fixedly connected to the wiring plate 4. In actual application, the positioning pin 8 is installed closer to the terminal plate 1 inside the telescopic outer tube 5.

[0026] In this telescopic clamp, a terminal plate mounting hole 9 is provided on one side of the terminal plate 1, and a terminal plate mounting hole 10 is provided on one side of the wiring plate 4. A conductive strip is installed between the terminal plate mounting hole 9 and the terminal plate mounting hole 10.

[0027] In practical applications, the telescopic tube is composed of a telescopic inner tube 2 and a telescopic outer tube 5, which are nested together. A watch strap contact 6 is installed between the walls of the two tubes. The watch strap contact 6 plays a conductive role before and after sliding. The watch strap contact 6 is installed inside the telescopic outer tube 5. In addition, a positioning pin 8 is installed on one side inside the telescopic outer tube 5. The positioning pin 8 plays a limiting role.

[0028] It should be noted that in this telescopic clamp, the structure of the telescopic clamp body 11 only needs to include the wiring board 4 and the terminal board 1. The wiring board 4 connects to the flexible busbar. In practical applications, the telescopic clamp body 11 can be a conventional existing clamp body, or it can be designed according to actual needs.

[0029] In practical applications, the telescopic tube assembly includes a telescopic inner tube 2 and a telescopic outer tube 5. The structures of the telescopic inner tube 2 and the telescopic outer tube 5 are adapted to each other. The telescopic inner tube 2 is a tubular structure, and the telescopic outer tube 5 is a tubular structure. The cross-sections of the telescopic inner tube 2 and the telescopic outer tube 5 include, but are not limited to, circles or squares. The outer diameter of the telescopic inner tube 2 does not exceed the inner diameter of the telescopic outer tube 5. The telescopic inner tube 2 is provided with a sliding groove 7. The telescopic inner tube 2 is slidably connected to the telescopic outer tube 5 through the sliding groove 7. The sliding of the telescopic inner tube 2 is controlled by the sliding groove 7. The distance of the sliding groove 7 is adapted to the length of the telescopic inner tube 2. The sliding groove 7 controls the telescopic distance between the telescopic inner tube 2 and the telescopic outer tube 5.

[0030] The telescopic clamp for substation flexible busbars provided by this invention can be installed at the connection between the high-voltage disconnector and the flexible busbar. It not only alleviates the problem of changes in the sag of the flexible busbar caused by foundation deformation, thereby reducing the number of unplanned outages of the substation, but also prevents overheating after long-term operation. Its expansion rate and rated current can be adjusted according to the actual conditions of different regions and substations.

[0031] This invention provides a telescopic clamp for substation flexible busbars, which can effectively reduce the sag of flexible busbars caused by foundation deformation of primary equipment in substations. It has a telescopic sliding function, ensuring that the sag of the flexible busbar remains within acceptable limits even when the foundation deforms. The working principle of this telescopic clamp for substation flexible busbars is described in detail below: In this embodiment, the internal connection of the telescopic clamp body 11 is a flexible busbar; In practical applications, the telescopic clamp body 11 includes a terminal plate 1, the inside of which is connected to a telescopic tube assembly, the other side of which is connected to the inside of a terminal block 4, a flexible busbar is installed inside the telescopic tube assembly, and the outside of the terminal plate 1 is connected to the outside of the terminal block 4 via a conductive strip.

[0032] In this embodiment, the telescopic tube assembly includes a telescopic inner tube 2 and a telescopic outer tube 5. The telescopic outer tube 5 is slidably connected to the outside of the telescopic inner tube 2. A telescopic spring 3 is installed between the telescopic inner tube 2 and the telescopic outer tube 5. A terminal plate 1 is fixedly connected to one side of the telescopic inner tube 2, and a wiring plate 4 is fixedly connected to one side of the telescopic outer tube 5.

[0033] In practical applications, the telescopic distance is the sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5. The telescopic distance includes multiple distance states, namely a first distance state, a second distance state, and a variant distance state. The first distance state is a fixed distance, the second distance state is a fixed distance, and the variant distance state is a variable distance. The distance in the first distance state is greater than the distance in the second distance state, the distance in the variant distance state is less than the distance in the first distance state, and the distance in the variant distance state is greater than the distance in the second distance state.

[0034] In this embodiment, the first distance state is the maximum sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the first distance state is the sum of the lengths of the telescopic inner tube 2 and the telescopic outer tube 5; the second distance state is the minimum sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the second distance state is either the length of the telescopic inner tube 2 or the length of the telescopic outer tube 5; the variant distance state is the varying sliding distance between the telescopic inner tube 2 and the telescopic outer tube 5, and the length of the variant distance state is between the length of the second distance state and the length of the first distance state.

[0035] In practical applications, the telescopic inner tube 2 and the telescopic outer tube 5 are nested together, and a strap contact finger 6 is installed between the two tube walls. The strap contact finger 6 plays a conductive role before and after sliding, reducing the contact resistance before, during and after sliding. The outer side of the strap contact finger 6 is a positioning pin 8. The positioning pin 8 provides additional sag when the sag of the flexible busbar changes excessively, thus playing a limiting role. In addition, the connection between the terminal block 4 and the terminal block 1 is a flexible connection. A conductive strip is installed between the terminal block 4 and the terminal block 1. One end of the terminal block 4 is provided with a terminal block mounting hole 10, and one end of the terminal block 1 is provided with a terminal block mounting hole 9. A conductive strip is installed between the terminal block mounting hole 10 and the terminal block mounting hole 9. The conductive strip can prevent overheating when a large load current passes through, which is suitable for high current and high load conditions.

[0036] In this embodiment, the telescopic clamp body 11 can be a conventional SLG-3 equipment clamp, but is not limited to this equipment. The telescopic clamp body 11 can be designed according to the structure provided in this technical solution. It should be noted that the terminal block 4 of the telescopic clamp body 11 is connected to the flexible busbar. A telescopic tube assembly, namely the telescopic inner tube 2 and the telescopic outer tube 5, is installed between the terminal block 4 and the terminal block 1 of the telescopic clamp body 11. A telescopic spring 3 is installed between the telescopic inner tube 2 and the telescopic outer tube 5. The telescopic tube assembly is controlled to extend and retract by the telescopic spring 3.

[0037] In addition, in this embodiment, the telescopic tube assembly adopts a tubular structure with a circular cross-section, that is, the telescopic inner tube 2 is a circular tube and the telescopic outer tube 5 is a circular tube. The outer diameter of the telescopic inner tube 2 does not exceed the inner diameter of the telescopic outer tube 5. The distance of the sliding groove 7 on the outside of the telescopic inner tube 2 is equal to the length of the telescopic inner tube 2. That is, the telescopic distance between the telescopic inner tube 2 and the telescopic outer tube 5 is adjusted by the sliding groove 7.

[0038] In practical applications, this embodiment is installed at the connection between the high-voltage disconnector and the flexible busbar. After multiple experiments, it effectively alleviates the problem of changes in the sag of the flexible busbar caused by foundation deformation, thereby reducing the number of unplanned outages of the substation.

[0039] After multiple tests, the telescopic tube assembly provided in this embodiment has a telescopic inner tube 2 and a telescopic outer tube 5 with a telescopic expansion rate of not less than 30%. Furthermore, after observation and actual operation, this embodiment did not experience overheating after long-term operation. It should be noted that the expansion rate and rated current can be adjusted according to the actual conditions of different substations in different regions.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A telescopic clamp for a substation flexible busbar, characterized in that, include: Telescopic clamp body (11), the telescopic clamp body (11) is internally connected to a flexible busbar; The telescopic clamp body (11) includes a terminal plate (1), the inside of the terminal plate (1) is connected to a telescopic tube assembly, the other side of the telescopic tube assembly is connected to the inside of the wiring plate (4), a flexible busbar is installed inside the telescopic tube assembly, and the outside of the terminal plate (1) is connected to the outside of the wiring plate (4) through a conductive strip; The telescopic tube assembly includes a telescopic inner tube (2) and a telescopic outer tube (5). The telescopic outer tube (5) is slidably connected to the outside of the telescopic inner tube (2). A telescopic spring (4) is installed between the telescopic inner tube (2) and the telescopic outer tube (5). A terminal plate (1) is fixedly connected to one side of the telescopic inner tube (2), and a wiring plate (4) is fixedly connected to one side of the telescopic outer tube (5). The telescopic inner tube (2) and the telescopic outer tube (5) are controlled to extend and retract by the telescopic spring (3). The telescopic inner tube (2) and the telescopic outer tube (5) are controlled to extend and retract by sliding.

2. The telescopic clamp for substation flexible busbars according to claim 1, characterized in that, The outer diameter of the telescopic inner tube (2) is adapted to the inner diameter of the telescopic outer tube (5).

3. The telescopic clamp for substation flexible busbars according to claim 1, characterized in that, The telescopic distance is the stretching distance and contraction distance between the telescopic inner tube (2) and the telescopic outer tube (5).

4. The telescopic clamp for substation flexible busbars according to claim 3, characterized in that, The telescopic distance includes multiple distance states, namely a first distance state, a second distance state, and a variant distance state. The first distance state is a fixed distance, the second distance state is a fixed distance, and the variant distance state is a variable distance. The distance in the first distance state is greater than the distance in the second distance state, the distance in the variant distance state is less than the distance in the first distance state, and the distance in the variant distance state is greater than the distance in the second distance state.

5. The telescopic clamp for substation flexible busbars according to claim 4, characterized in that, The first distance state is the maximum sliding distance between the telescopic inner tube (2) and the telescopic outer tube (5), and the length of the first distance state is the sum of the length of the telescopic inner tube (2) and the length of the telescopic outer tube (5).

6. The telescopic clamp for substation flexible busbars according to claim 4, characterized in that, The second distance state is the minimum sliding distance between the telescopic inner tube (2) and the telescopic outer tube (5), and the length of the second distance state is the length of the telescopic inner tube (2) or the length of the telescopic outer tube (5).

7. The telescopic clamp for substation flexible busbars according to claim 6, characterized in that, The length of the telescopic inner tube (2) is adapted to the length of the telescopic outer tube (5).

8. The telescopic clamp for substation flexible busbars according to claim 4, characterized in that, The variant distance state is the varying distance between the telescopic inner tube (2) and the telescopic outer tube (5), and the length of the variant distance state is between the length of the second distance state and the length of the first distance state.

9. The telescopic clamp for substation flexible busbars according to claim 1, characterized in that, The telescopic inner tube (2) is provided with a sliding groove (7) on the outside. The length of the telescopic inner tube (2) is adapted to the length of the sliding groove (7). The telescopic inner tube (2) is connected to the telescopic outer tube (5) through the sliding groove connection (7).

10. The telescopic clamp for substation flexible busbars according to claim 1, characterized in that, The inside of the telescopic outer tube (5) is fitted with a watch strap finger (6) and a positioning pin (8), and the side of the watch strap finger (6) is the positioning pin (8).

11. The telescopic clamp for substation flexible busbars according to claim 1, characterized in that, The terminal block (1) has a terminal block mounting hole (9) on one side, and the wiring block (4) has a wiring block mounting hole (10) on one side. A conductive strip is installed between the terminal block mounting hole (9) and the wiring block mounting hole (10).

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