Power transmission switching device of transformer substation

Abstract

The utility model relates to the field of transformer substation switches, in particular to a transformer substation power transmission switching device which comprises a base, a power supply binding post, a main binding post, a standby binding post and a switching spring, the power supply binding post, the main binding post and the standby binding post are all installed on the base, and the power supply binding post is located between the main binding post and the standby binding post; the main binding post is provided with a main connector bar, the standby binding post is provided with a standby connector bar, the power supply binding post is provided with a power supply connector bar, and the power supply connector bar is rotatably matched with a power supply switching knife; one end of the switching spring is installed on the base, the other end of the switching spring is installed on the power supply switching knife, and when the power supply switching knife is connected to the main line bank or the standby line bank, the switching spring is in a stretching state. The power supply switching device has the effect of ensuring the connection stability between the power supply switching piece and the main binding post or the standby binding post.

Description

Technical Field

[0001] The present application relates to the field of substation switches, and in particular to a substation power transmission switching device. Background Art

[0002] For some areas with higher power supply requirements, two power supplies are usually set up, namely the main power supply and the backup power supply. When the main power supply fails, the substation needs to promptly switch the power supply of the area to the backup power supply through the power transmission switching device to ensure the power supply of the area.

[0003] In the existing related technologies, the power transmission switching device can refer to the utility model patent with publication number CN 214477181 U, which discloses a high-voltage dual-power mechanical locking and switching isolating switch, which drives the power switching knife to rotate so that the output pole is switched from the main terminal to the spare terminal, thereby completing the switching of the power supply.

[0004] With respect to the above-mentioned related technologies, in actual use, the connection between the power switching component and the main terminal or the spare terminal is unstable, making the connection between the power switching component and the main terminal or the spare terminal easy to be cut off. Utility Model Content

[0005] In order to ensure the connection stability between the power switching component and the main terminal post or the spare terminal post, the present application provides a substation power transmission switching device.

[0006] The present application provides a substation power transmission switching device that adopts the following technical solution:

[0007] A power transmission switching device for a substation, comprising a base, a power supply terminal, a main terminal, a spare terminal and a switching spring, wherein the power supply terminal, the main terminal and the spare terminal are all installed on the base, and the power supply terminal is located between the main terminal and the spare terminal;

[0008] The main terminal post is installed with a main terminal block, the spare terminal post is installed with a spare terminal block, the power supply terminal post is installed with a power supply terminal block, and the power supply terminal block is rotatably matched with a power switch knife;

[0009] One end of the switching spring is installed on the base, and the other end of the switching spring is installed on the power switching knife. When the power switching knife is connected to the main wiring block or the spare wiring block, the switching spring is in a stretched state.

[0010] By adopting the above technical solution, when the power switching knife is connected to the main terminal block or the spare terminal block, the switching spring is in a stretched state, so that the power switching knife is always tightly fitted to the main terminal block or the spare terminal block, thereby ensuring the connection stability between the power switching component and the main terminal block or the spare terminal block.

[0011] Optionally, the base is rotatably matched with a rotating block, the rotating block is equipped with an active wedge block, and the switching spring is installed on the rotating block;

[0012] The base is provided with a limiting assembly, which includes a limiting seat, a passive wedge block and a return spring. The limiting seat is installed on the base, the passive wedge block is slidably fitted on the limiting seat, one end of the return spring is installed on the limiting seat, and the other end of the return spring is installed on the passive wedge block.

[0013] By adopting the above technical solution, after the active wedge block pushes the passive wedge block to slide, the passive wedge block is subsequently reset under the action of the reset spring, so that the passive wedge block limits the movement of the active wedge block, thereby making it difficult for the rotating block to move, thereby reducing the occurrence of rebound when the power switching knife is connected to the main terminal block or the spare terminal block, which is beneficial to further ensure the connection stability between the power switching component and the main terminal post or the spare terminal post.

[0014] Optionally, the limiting seat is penetrated by a wedge block sliding hole, the passive wedge block is slidably engaged in the wedge block sliding hole, the passive wedge block is installed with a wedge block pull rod, and one end of the wedge block pull rod is located outside the wedge block sliding hole.

[0015] By adopting the above technical solution, the wedge block pull plate makes it easier for the operator to pull the passive wedge block, thereby facilitating the unlocking of the active wedge block.

[0016] Optionally, a pull rod protrusion is installed at one end of the wedge pull rod located outside the wedge slide hole, and the diameter of the pull rod protrusion is larger than the diameter of the wedge pull rod.

[0017] By adopting the above technical solution, the protrusion of the pull rod makes it easier for the operator to pull the passive wedge, thereby further facilitating the unlocking of the active wedge.

[0018] Optionally, the base is rotatably matched with a rotating block, the rotating block is installed with a telescopic rod, and the telescopic rod is used to drive the switching spring to move towards or away from the rotating block.

[0019] By adopting the above technical solution, it is convenient for the operator to adjust the elastic force of the switching spring according to the actual situation, thereby ensuring that the power switching knife is always tightly fitted to the main terminal block or the spare terminal block under the action of the switching spring while ensuring that the operator turns the power switching knife.

[0020] Optionally, the telescopic rod includes a rotating screw tube, a first screw and a second screw, the rotating screw tube having a first threaded hole and a second threaded hole, the first threaded hole and the second threaded hole having opposite rotation directions; one end of the first screw rod is threadedly engaged with the first threaded hole, the other end of the first threaded hole is installed on the rotating block, one end of the second screw rod is threadedly engaged with the second threaded hole, and the other end of the second screw rod is installed on the switching spring.

[0021] By adopting the above technical solution, when the rotating solenoid rotates, the first screw rod and the second screw rod will move towards or away from each other, thereby conveniently adjusting the elastic force of the switching spring.

[0022] Optionally, the switching spring, the rotating solenoid, the first screw rod and the second screw rod are coaxially arranged.

[0023] By adopting the above technical solution, the coaxially arranged switching spring, rotating solenoid, first screw rod and second screw rod are conducive to ensuring the stable transmission of the elastic force of the switching spring.

[0024] Optionally, the switching spring is mounted on the power switching knife via an insulating rod, and the insulating rod is rotatably matched with the power switching knife.

[0025] By adopting the above technical solution, the insulating rod makes it difficult for the current of the power switch knife to flow into the switching spring, which is beneficial to ensuring the safety of the power transmission switching device.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. When the power switch is connected to the main wiring block or the spare wiring block, the switch spring is in a stretched state, so that the power switch is always tightly fitted to the main wiring block or the spare wiring block, thereby ensuring the connection stability between the power switch and the main wiring post or the spare wiring post;

[0028] 2. After the active wedge pushes the passive wedge to slide, the passive wedge is subsequently reset under the action of the reset spring, so that the passive wedge restricts the movement of the active wedge, thereby making it difficult for the rotating block to move, thereby reducing the rebound when the power switch is connected to the main terminal block or the spare terminal block, which is conducive to further ensuring the connection stability between the power switch and the main terminal post or the spare terminal post;

[0029] 3. It is convenient for the operator to adjust the elastic force of the switching spring according to the actual situation, and then ensure that the power switching knife is always tightly fitted to the main terminal block or the spare terminal block under the action of the switching spring while ensuring that the operator turns the power switching knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 It is a cross-sectional schematic diagram of the telescopic rod according to the embodiment of the present application.

[0032] Figure 3 It is a cross-sectional schematic diagram of a limiting component of an embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the implementation of the power switch knife and the switch spring in the embodiment of the present application.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. Power supply terminal; 11. Power supply terminal block; 2. Main terminal; 21. Main terminal block; 3. Spare terminal; 31. Spare terminal block; 4. Switching spring; 5. Power switching knife; 6. Rotating block; 61. Active wedge block; 7. Telescopic rod; 701. First threaded hole; 702. Second threaded hole; 71. Rotating solenoid; 72. First screw; 73. Second screw; 8. Limiting assembly; 801. Wedge block sliding hole; 81. Limiting seat; 82. Passive wedge block; 821. Wedge block pull rod; 822. Pull rod protrusion; 83. Reset spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The present application embodiment discloses a substation power transmission switching device. Figure 1 The substation power transmission switching device includes a base, a power supply terminal 1, a main terminal 2, a spare terminal 3 and a switching spring 4.

[0037] Reference Figure 1 , the power supply terminal 1, the main terminal 2 and the spare terminal 3 are all installed on the base, and the power supply terminal 1 is located between the main terminal 2 and the spare terminal 3. The main terminal block 21 is fixedly installed on the top of the main terminal block 2, the spare terminal block 31 is fixedly installed on the top of the spare terminal block 3, and the power supply terminal block 11 is fixedly installed on the top of the power supply terminal 1. The main terminal block 21 is used to connect the main power supply, the spare terminal block 31 is used to connect the spare power supply, and the power supply terminal block 11 is used to connect the power supply network of the power supply area. The power supply terminal block 11 is rotatably matched with a power switch knife 5, so that by rotating the power switch knife 5, the power switch knife 5 is connected to the main terminal block 21 or the spare terminal block 31, thereby switching the power supply of the power supply area to the main power supply or the spare power supply accordingly.

[0038] Reference Figure 1, the switching spring 4 is mounted on the power switch blade 5 through an insulating rod, one end of the insulating rod is rotatably matched with the power switch blade 5, and the other end of the insulating rod is fixedly mounted on one end of the switching spring 4. It should be understood that the insulating rod referred to in this application can be any element with insulating properties known to those skilled in the art, such as a rubber rod or a ceramic rod.

[0039] Reference Figure 1 The base is rotatably matched with a rotating block 6, which is located at the bottom of the power supply terminal 1 and between the main terminal 2 and the spare terminal 3. Figure 2 The end of the switching spring 4 away from the insulating rod is equipped with a telescopic rod 7, and the telescopic rod 7 includes a rotating screw 71, a first screw 72 and a second screw 73. The rotating screw 71 is penetrated by a first threaded hole 701 and a second threaded hole 702, and the first threaded hole 701 and the second threaded hole 702 are respectively located at two ends of the rotating screw 71, and the first threaded hole 701 and the second threaded hole 702 have opposite rotation directions. One end of the first screw 72 is threadedly engaged with the first threaded hole 701, and the other end of the first threaded hole 701 is installed on the rotating block 6. One end of the second screw 73 is threadedly engaged with the second threaded hole 702, and the other end of the second screw 73 is installed on the switching spring 4. The switching spring 4, the rotating solenoid 71, the first screw 72 and the second screw 73 are coaxially arranged so that the first screw 72 and the second screw 73 can move toward or away from each other by stably rotating the rotating solenoid 71, thereby driving the switching spring 4 to move toward or away from the rotating block 6, thereby adjusting the elastic force of the switching spring 4.

[0040] Reference Figure 1 , the rotating block 6 is fixedly mounted with two active wedge blocks 61, and an active inclined surface is provided at one end of the active wedge block 61 away from the rotating block 6;

[0041] Combination Figure 3The base is provided with a limiting assembly 8, and the limiting assembly 8 includes a limiting seat 81, a passive wedge block 82 and a return spring 83. The limiting seat 81 is fixedly installed on the base, and two wedge block sliding holes 801 are opened through the limiting seat 81. The two wedge block sliding holes 801 are respectively located on both sides of the rotating block 6, and the two wedge block sliding holes 801 extend in the horizontal direction. There are two passive wedge blocks 82, and the two passive wedge blocks 82 are respectively slidably matched with the two wedge block sliding holes 801. A passive inclined surface is provided at one end of the passive wedge block 82 away from the wedge block sliding hole 801, and the passive inclined surface is located outside the wedge block sliding hole 801. When the active inclined surface is tightly matched with the passive inclined surface from top to bottom, the passive wedge block 82 slides toward the inside of the wedge block sliding hole 801. The return spring 83 is arranged in the wedge block sliding hole 801, and one end of the return spring 83 is fixedly mounted on the inner wall of the wedge block sliding hole 801, and the other end of the return spring 83 is fixedly mounted on the passive wedge block 82, so as to drive the passive wedge block 82 to move toward the outside of the wedge block sliding hole 801 when the active inclined surface is not tightly fitted on the passive inclined surface.

[0042] Reference Figure 3 A wedge rod 821 is fixedly installed on the end of the passive wedge block 82 away from the passive inclined surface, one end of the wedge rod 821 is located outside the wedge sliding hole 801, and a rod protrusion 822 is fixedly installed on the end of the wedge rod 821 away from the passive wedge block 82, and the diameter of the rod protrusion 822 is larger than the diameter of the wedge rod 821, so that the operator can pull the passive wedge block 82, thereby facilitating the unlocking of the active wedge block 61.

[0043] The implementation principle of a substation power transmission switching device in the embodiment of the present application is as follows: Figure 4 , it is necessary to rotate the power switch knife 5 toward the direction close to the main wiring bar 21 when the power switch knife 5 is connected to the main wiring bar 21. During the rotation of the power switch knife 5, the length of the switching spring 4 is gradually reduced but always kept stretched, so that when the power switch knife 5 is connected to the main wiring bar 21, the power switch knife 5 is always tightly fitted to the main wiring bar 21 under the elastic force of the switching spring 4, thereby ensuring the connection stability between the power switch component and the main terminal 2.

[0044] Continue to refer to Figure 4, it is necessary to rotate the power switch 5 toward the direction close to the spare terminal block 31 when the power switch 5 switches from the main terminal block 21 to the spare terminal block 31. During the rotation of the power switch 5, the length of the switch spring 4 gradually increases and then gradually decreases, but always keeps stretched, so that when the power switch 5 is connected to the spare terminal block 31, the power switch 5 is always tightly fitted to the spare terminal block 31 under the elastic force of the switch spring 4, thereby ensuring the connection stability between the power switch and the spare terminal 3. Therefore, the present application ensures the connection stability between the power switch and the main terminal 2 or the spare terminal 3 by changing the direction of the elastic force of the switch spring 4.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A power transmission switching device for a substation, characterized in that: The invention comprises a base, a power supply terminal (1), a main terminal (2), a spare terminal (3) and a switching spring (4); the power supply terminal (1), the main terminal (2) and the spare terminal (3) are all installed on the base, and the power supply terminal (1) is located between the main terminal (2) and the spare terminal (3); The main terminal post (2) is equipped with a main terminal block (21), the spare terminal post (3) is equipped with a spare terminal block (31), the power supply terminal post (1) is equipped with a power supply terminal block (11), and the power supply terminal block (11) is rotatably matched with a power switch knife (5); One end of the switching spring (4) is mounted on a base, and the other end of the switching spring (4) is mounted on a power switching knife (5). When the power switching knife (5) is connected to a main wiring block (21) or a spare wiring block (31), the switching spring (4) is in a stretched state.

2. A substation power transmission switching device according to claim 1, characterized in that: The base is rotatably matched with a rotating block (6), the rotating block (6) is installed with an active wedge block (61), and the switching spring (4) is installed on the rotating block (6); The base is provided with a limiting assembly (8), and the limiting assembly (8) includes a limiting seat (81), a passive wedge block (82) and a return spring (83), wherein the limiting seat (81) is mounted on the base, the passive wedge block (82) is slidably engaged with the limiting seat (81), one end of the return spring (83) is mounted on the limiting seat (81), and the other end of the return spring (83) is mounted on the passive wedge block (82).

3. A substation power transmission switching device according to claim 2, characterized in that: The limiting seat (81) is penetrated by a wedge block sliding hole (801), and the passive wedge block (82) is slidably engaged with the wedge block sliding hole (801). The passive wedge block (82) is installed with a wedge block pull rod (821), and one end of the wedge block pull rod (821) is located outside the wedge block sliding hole (801).

4. A substation power transmission switching device according to claim 3, characterized in that: A pull rod protrusion (822) is installed at one end of the wedge pull rod (821) located outside the wedge slide hole (801), and the diameter of the pull rod protrusion (822) is larger than the diameter of the wedge pull rod (821).

5. A substation power transmission switching device according to claim 1, characterized in that: The base is rotatably matched with a rotating block (6), and the rotating block (6) is installed with a telescopic rod (7). The telescopic rod (7) is used to drive the switching spring (4) to move in a direction close to or away from the rotating block (6).

6. A substation power transmission switching device according to claim 5, characterized in that: The telescopic rod (7) comprises a rotating screw tube (71), a first screw rod (72) and a second screw rod (73); the rotating screw tube (71) is provided with a first threaded hole (701) and a second threaded hole (702); the first threaded hole (701) and the second threaded hole (702) have opposite rotation directions; one end of the first screw rod (72) is threadedly engaged with the first threaded hole (701), and the other end of the first threaded hole (701) is mounted on the rotating block (6); one end of the second screw rod (73) is threadedly engaged with the second threaded hole (702), and the other end of the second screw rod (73) is mounted on the switching spring (4).

7. A substation power transmission switching device according to claim 6, characterized in that: The switching spring (4), the rotating solenoid (71), the first screw rod (72) and the second screw rod (73) are coaxially arranged.

8. A substation power transmission switching device according to claim 1, characterized in that: The switching spring (4) is mounted on the power switching knife (5) via an insulating rod, and the insulating rod is rotatably matched with the power switching knife (5).

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