Vacuum load isolation switch

Abstract

The utility model relates to the technical field of power switches, in particular to a vacuum load isolating switch, which comprises isolating switches and grounding switches, the isolating switches are connected with an isolating switch shaft, the grounding switches are connected with a grounding switch shaft, the grounding switch shaft and the isolating switch shaft are connected to form a synchronous linkage relation, the isolating switches are mounted on an insulating seat, and the insulating seat is mounted on the insulating seat. A vacuum arc-extinguishing seat is arranged on the lower surface of the insulating seat, a vacuum arc-extinguishing bubble is installed in the vacuum arc-extinguishing seat, a fixing seat is connected to the lower end face of the vacuum arc-extinguishing seat, a sliding groove is formed in the fixing seat, a sliding seat is installed in the sliding groove in a sliding mode, a supporting frame is connected to the front surface of the sliding seat, and a reset spring is connected between the lower surface of the sliding seat and the bottom face of the sliding groove. The supporting frame is further provided with a round hole, and a fuse is arranged in the round hole in a sleeved mode. According to the utility model, the problem that the circuit is disconnected or the voltage is insufficient due to the imperfect circuit caused by the fact that the contact at the upper end of the fuse cannot be in good contact with the contact needing to be contacted completely can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power switches, in particular to a vacuum load isolating switch. Background Art

[0002] The vacuum load isolating switch is a common electrical load switch. Its main function is to disconnect or connect the electrical load circuit. When an electrical fault occurs in the electrical load circuit, the vacuum load isolating switch can automatically disconnect the circuit to ensure the safety and stability of the electrical system. At the same time, the vacuum load isolating switch is an indispensable part of the power system. It is usually used in distribution networks, substations and other places. In the operation of the power system, the vacuum load isolating switch can not only simplify the operating process and reduce maintenance costs, but also improve the reliability and stability of the power system. It has higher insulation strength and flexibility and is a more reliable switching device.

[0003] For example, the patent document with publication number CN217214568U discloses an indoor high-voltage vacuum load disconnector, which relates to the technical field of high-voltage electrical equipment components, and specifically includes an insulating seat, an isolating switch, an upper outlet and a lower outlet, a vacuum arc extinguishing chamber is fixedly installed inside the insulating seat, the front of the insulating seat is a hollow structure, and a metal frame is fixedly installed on the back of the insulating seat; however, the prior art still has many shortcomings, for example: the upper end contact of the fuse cannot completely make benign contact with the contact that needs to be contacted, resulting in an imperfect circuit, resulting in circuit disconnection or insufficient voltage. Utility Model Content

[0004] Aiming at the problems existing in the prior art, the utility model provides a vacuum load isolating switch.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum load isolating switch, comprising an isolating switch and an earthing switch, the isolating switches are both connected to the isolating switch shaft, the earthing switches are both connected to the earthing switch shaft, wherein the earthing switch shaft is connected to the isolating switch shaft to form a synchronous linkage relationship, and the isolating switch is installed on an insulating seat, a vacuum arc extinguishing seat is provided on the lower surface of the insulating seat, a vacuum arc extinguishing bubble is installed in the vacuum arc extinguishing seat, a fixed seat is connected to the lower end surface of the vacuum arc extinguishing seat, a slide groove is provided on the fixed seat, a slide seat is slidably installed in the slide groove, a support frame is connected to the front surface of the slide seat, and a reset spring is connected between the lower surface of the slide seat and the bottom surface of the slide groove, a circular hole is also provided on the support frame, and a fuse is sleeved in the circular hole.

[0006] As a further improvement to the above scheme, baffles are fixed on the left and right outer surfaces of the fixing seat, a groove is opened at the lower end of the fixing seat, a strike plate is rotatably installed in the groove, and the strike plate is located directly below the lower end contact of the fuse.

[0007] As a further improvement to the above solution, a lower wiring terminal is also fixed on the front surface of the fixing seat, and the lower wiring terminal is in contact with the supporting frame.

[0008] As a further improvement to the above solution, the isolating switch comprises a stationary contact seat and a moving contact seat, the moving contact seat is hingedly connected to the upper surface of the insulating seat, and an upper terminal is also fixed to the upper end of the stationary contact seat.

[0009] As a further improvement to the above solution, the isolating switch is connected to the upper contact of the vacuum arc extinguishing bubble, and the lower contact of the vacuum arc extinguishing bubble is connected to the upper contact of the fuse.

[0010] The impact piece is also connected to an insulating pull rod, and the rear end of the insulating pull rod is connected to the grounding switch shaft.

[0011] As a further improvement to the above solution, the right ends of the isolating switch shaft and the grounding switch shaft are both connected to an operating panel, and the operating panel is provided with operating holes that match the isolating switch shaft and the grounding switch shaft.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a slide groove is provided on the fixed seat, and a slide seat is slidably installed in the slide groove, and the slide seat can slide in the slide groove in the upward and downward directions, and the front surface of the slide seat is also connected to a support frame, and a reset spring is connected between the lower surface of the slide seat and the bottom surface of the slide groove, and a round hole is also provided on the support frame, and a fuse is sleeved in the round hole. Under the action of the reset spring rebounding and resetting, the support frame has a tendency to move upward, that is, the support frame continuously presses up on the fuse, so that the upper end contact of the fuse can completely make good contact with the lower end contact of the vacuum arc extinguishing bubble, and the circuit is more perfect, preventing the circuit from being disconnected or the voltage being insufficient due to poor contact between the contacts. At the same time, when the user installs and disassembles the fuse, the space is increased by pressing the reset spring, so that the fuse can be installed and disassembled conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0017] Figure 3 This is a schematic diagram of the structure of the isolating switch and fuse in the utility model;

[0018] Figure 4 It is a schematic diagram of the fixing seat and external structure in the utility model.

[0019] In the figure: 1-isolating switch; 101-static contact seat; 102-moving contact seat; 2-earthing switch; 3-isolating switch shaft; 4-earthing switch shaft; 5-insulating seat; 6-vacuum arc extinguishing seat; 7-vacuum arc extinguishing bubble; 8-fixed seat; 9-slide groove; 10-slide seat; 11-support frame; 12-reset spring; 13-round hole; 14-fuse; 15-groove; 16-impact piece; 17-lower terminal; 18-upper terminal; 19-insulating pull rod; 20-operating panel; 21-operating hole; 22-baffle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0021] A vacuum load isolating switch, such as Figure 1 , Figure 2 and Figure 3As shown, it includes an isolating switch 1 and a grounding switch 2, the isolating switches 1 are connected to the isolating switch shaft 3, the grounding switches 2 are connected to the grounding switch shaft 4, the isolating switch shaft 3 is connected to drive the parallel isolating switches 1 of each phase, and the grounding switch shaft 4 is connected to drive the parallel grounding switches 2 of each phase, wherein the grounding switch shaft 4 is connected to the isolating switch shaft 3 to form a synchronous linkage relationship, and the isolating switch 1 includes a static contact seat 101 and a moving contact seat 102, the moving contact seat 102 is hingedly connected to the upper surface of the insulating seat 5, and the upper end of the static contact seat 101 is also fixed with an upper terminal 18. Rotate the isolating switch shaft 3 to rotate the moving contact seat 102 to contact the upper terminal 18 at the upper end of the static contact seat 101, thereby realizing the passage. A vacuum arc extinguishing seat 6 is provided on the lower surface of the insulating seat 5. A vacuum arc extinguishing bubble 7 is installed in the vacuum arc extinguishing seat 6. The isolating switch 1 is connected to the upper contact of the vacuum arc extinguishing bubble 7. When a short circuit or overload occurs in the circuit, the current will be very large. If it is not controlled, the arc will damage the equipment. The vacuum arc extinguishing bubble 7 can isolate the formation of the arc and play an arc extinguishing role, which can prevent the occurrence of dangerous situations.

[0022] like Figure 2 , Figure 3 and Figure 4 As shown, the lower end surface of the vacuum interrupter 6 is connected to a fixed seat 8, and a groove 15 is provided at the lower end of the fixed seat 8. A striker 16 is rotatably installed in the groove 15, and the striker 16 is located directly below the lower contact of the fuse 14. The striker 16 is also connected to an insulating pull rod 19, and the rear end of the insulating pull rod 19 is connected to the grounding switch shaft 4. The fuse 14 generates an explosive impact force that can impact the striker 16 below it, and the disconnector 1 is disconnected through the linkage relationship, thereby achieving safety protection of the circuit. A lower wiring terminal 17 is also fixed to the front surface of the fixed seat 8, and wiring is performed through the lower wiring terminal 17. The right ends of the disconnector shaft 3 and the grounding switch shaft 4 are also connected to an operating panel 20, and an operating hole 21 is provided on the operating panel 20 to match the disconnector 1 and the grounding switch 2. The rotation of the disconnector shaft 3 and the grounding switch shaft 4 is controlled through the operating hole 21.

[0023] like Figure 3 and Figure 4As shown, a slide groove 9 is provided on the fixed seat 8, and a slide seat 10 is slidably installed in the slide groove 9. A support frame 11 is connected to the front surface of the slide seat 10. The support frame 11 can move along the direction of the slide groove 9 with the slide seat 10, and a reset spring 12 is connected between the lower surface of the slide seat 10 and the bottom surface of the slide groove 9. A round hole 13 is also provided on the support frame 11, and a fuse 14 is sleeved in the round hole 13. Under the action of the reset spring 12, the support frame 11 continuously squeezes the fuse 14 upward so that the upper end contact of the fuse 14 is fully in contact with the lower end contact of the vacuum arc extinguishing bubble 7. Baffles 22 are also fixed on the left and right outer surfaces of the fixed seat 8. The baffle 22 can prevent the fuse 14 from being deflected, so that the fuse 14 can be firmly fixed in position, and the lower terminal 17 is in contact with the support frame 11.

[0024] When the utility model is working, the grounding switch shaft 4 is firstly rotated by the operating panel 20 to disconnect the grounding switch 2 and open it. Since the isolating switch shaft 3 and the grounding switch shaft 4 are in a linkage relationship, the isolating switch shaft drives the isolating switch 1 to close and connects with the upper wiring terminal 18 to realize the passage. When the current is too large and overloaded in the working state, the fuse 14 generates an explosive impact force to impact the impact plate 16 below it, thereby triggering the insulating pull rod 19 to close the grounding switch, and at the same time the linked isolating switch 1 is disconnected, realizing the safety protection of the circuit. At the same time, a slide groove 9 is provided on the fixed seat 8, and a slide seat 10 is slidably installed in the slide groove 9. The slide seat 10 can slide in the slide groove 9 in the up and down directions, and the front surface of the slide seat 10 is also connected to the support frame 11, that is, the support frame 11 can slide in the up and down directions. The sliding of the slide seat 10 and the bottom surface of the slide groove 9 is connected with a reset spring 12. A round hole 13 is also provided on the support frame 11. A fuse 14 is sleeved in the round hole 13. Under the action of the reset spring 12 rebounding and resetting, an upward force is provided for the slide seat 10, so that the support frame 11 has a tendency to move upward, that is, the support frame 11 continuously squeezes the fuse 14 upward, so that the upper end contact of the fuse 14 can completely make benign contact with the lower end contact of the vacuum arc extinguishing bubble 7, and the circuit is more perfect, preventing the circuit from being disconnected or the voltage is insufficient due to poor contact between the contacts. At the same time, when the user installs and removes the fuse 14, the space is increased by pressing the reset spring 12, so that the fuse 14 can be installed and removed conveniently.

[0025] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vacuum load isolating switch, comprising an isolating switch (1) and a grounding switch (2), characterized in that: The isolating switches (1) are all connected to the isolating switch shaft (3), and the grounding switches (2) are all connected to the grounding switch shaft (4), wherein the grounding switch shaft (4) is connected to the isolating switch shaft (3) to form a synchronous linkage relationship, and the isolating switches (1) are mounted on an insulating seat (5), a vacuum arc extinguishing seat (6) is provided on the lower surface of the insulating seat (5), a vacuum arc extinguishing bubble (7) is installed in the vacuum arc extinguishing seat (6), a fixed seat (8) is connected to the lower end surface of the vacuum arc extinguishing seat (6), a slide groove (9) is provided on the fixed seat (8), a slide seat (10) is slidably installed in the slide groove (9), a support frame (11) is connected to the front surface of the slide seat (10), and a reset spring (12) is connected between the lower surface of the slide seat (10) and the bottom surface of the slide groove (9), and a round hole (13) is also provided on the support frame (11), and a fuse (14) is sleeved in the round hole (13).

2. A vacuum load isolating switch according to claim 1, characterized in that: Baffles (22) are fixed to the left and right outer surfaces of the fixing seat (8), and a groove (15) is also provided at the lower end of the fixing seat (8). A striker (16) is rotatably mounted in the groove (15), and the striker (16) is located directly below the lower end contact of the fuse (14).

3. A vacuum load isolating switch according to claim 1, characterized in that: A lower wiring terminal (17) is also fixed on the front surface of the fixing seat (8), and the lower wiring terminal (17) is in contact with the support frame (11).

4. A vacuum load isolating switch according to claim 1, characterized in that: The isolating switch (1) comprises a stationary contact seat (101) and a moving contact seat (102), the moving contact seat (102) being hingedly connected to the upper surface of the insulating seat (5), and an upper wiring terminal (18) is also fixed to the upper end of the stationary contact seat (101).

5. A vacuum load isolating switch according to claim 1, characterized in that: The isolating switch (1) is connected to the upper contact of the vacuum arc extinguishing bubble (7), and the lower contact of the vacuum arc extinguishing bubble (7) is connected to the upper contact of the fuse (14).

6. A vacuum load isolating switch according to claim 2, characterized in that: The impact piece (16) is also connected to an insulating pull rod (19), and the rear end of the insulating pull rod (19) is connected to the grounding switch shaft (4).

7. A vacuum load isolating switch according to claim 1, characterized in that: The right ends of the isolating switch shaft (3) and the earthing switch shaft (4) are both connected to an operating panel (20), and the operating panel (20) is provided with an operating hole (21) that matches the isolating switch shaft (3) and the earthing switch shaft (4).

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