A high voltage isolating switch

Abstract

The utility model relates to the technical field of high-voltage disconnectors, and specifically to a high-voltage disconnector. The utility model comprises two insulating columns with a spacing, and a first terminal and a second terminal are fixedly installed on the tops of the two insulating columns respectively. A static contact is fixedly connected to the top of the first terminal, and two conductive arms are hinged on the static contact. A moving contact is fixedly connected to the top of the second terminal, and one end of the two conductive arms away from the static contact respectively contacts with two sides of the moving contact. A positioning recess is provided on the second terminal, and movable extrusion protrusions are provided on both sides of the inner wall of the positioning recess. When one end of the conductive arm is connected to the moving contact, the extrusion protrusion on the positioning recess will squeeze the conductive arm under the action of a pressure spring, so that the conductive arm can be kept in close contact with the moving contact, effectively preventing the conductive arm from being loosened with the moving contact, and ensuring the stability of the circuit connection.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage isolating switches, in particular to a high-voltage isolating switch. Background Art

[0002] High-voltage isolating switches are important switching devices in the electrical systems of power plants and substations. They must be used in conjunction with high-voltage circuit breakers. They are mainly used to ensure the safety of high-voltage electrical appliances and devices during maintenance work and to isolate voltage.

[0003] In the prior art, a high-voltage isolating switch proposed in patent application number "CN202122395757.3" belongs to the field of isolating switches, and includes two insulating columns with a spacing, and contacts are provided on the two insulating columns. The contacts are connected to terminal blocks, and the contacts are also connected to an opening and closing mechanism for controlling the disconnection or electrical connection of the two contacts. The closing and separation of the high-voltage isolating switch are achieved by the disconnection and electrical connection of the two contacts.

[0004] However, in the above patent application, the conductive arm in the high-voltage disconnector rotates and the contacts are disconnected or connected to achieve the closing and separation of the high-voltage disconnector. The conductive arm and the contacts are connected by contact, which cannot ensure the close fit between the conductive arm and the contacts, thereby affecting the stability of the circuit. Utility Model Content

[0005] The purpose of the utility model is to provide a high voltage isolating switch to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A high-voltage disconnector comprises two insulating columns with a spacing therebetween, a first terminal and a second terminal being fixedly mounted on the tops of the two insulating columns, a static contact being fixedly connected to the tops of the first terminals, two conductive arms being hingedly connected to the static contact, a moving contact being fixedly connected to the tops of the second terminals, and ends of the two conductive arms being away from the static contact respectively contacting the two sides of the moving contact.

[0008] The second terminal is provided with a positioning recess, and movable extrusion protrusions are provided on both sides of the inner wall of the positioning recess. The top of the extrusion protrusion is inclined, and the extrusion protrusion is used to squeeze the conductive arm toward the moving contact so that the conductive arm and the moving contact are in contact with each other.

[0009] Preferably, cavities are provided on both sides of the inner wall of the positioning recess, and the extrusion protrusion is arranged in the cavity. A pressure spring is fixedly connected to the inner surface of the cavity, and the pressure spring is used to apply pressure to the extrusion protrusion in a direction close to the conductive arm.

[0010] Preferably, an insulating connection portion is provided on the extrusion protrusion, and one end of the pressure spring away from the inner surface of the cavity is fixedly connected to the insulating connection portion.

[0011] Preferably, fixed limiting protrusions are fixedly connected to both sides of the inner wall of the cavity, and movable limiting protrusions used in conjunction with the fixed limiting protrusions are fixedly connected to both sides of the extrusion protrusion.

[0012] Preferably, the positioning recess is fixedly connected to an L-shaped fixing plate on one side away from the conductive arm, and a fixing bolt is provided on the horizontal end of the L-shaped fixing plate. The bottom of the fixing bolt passes through the L-shaped fixing plate and is threadedly connected to the second terminal, so as to fix the L-shaped fixing plate and the positioning recess to the second terminal.

[0013] Preferably, the first wiring terminal and the second wiring terminal are both provided with connection holes, and the connection holes are used to assist in connecting an external circuit with the first wiring terminal and the second wiring terminal.

[0014] Beneficial effects of the utility model:

[0015] The present invention can squeeze the conductive arm under the action of a pressure spring when one end of the conductive arm is connected to the movable contact, so that the conductive arm can be closely fitted with the movable contact, effectively preventing the conductive arm from being loosened from the movable contact, and ensuring the stability of the circuit connection. At the same time, when one end of the conductive arm rotates and separates from the movable contact, the squeezing protrusion will not block the rotation of the conductive arm, ensuring that the high-voltage disconnector can be closed or separated normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the second terminal;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the structure at one end of the middle conducting arm;

[0020] Figure 4 This utility model Figure 2 A schematic diagram of the structure of the middle positioning recess;

[0021] Figure 5 This utility model Figure 4 A cross-sectional view of the middle positioning recess;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Insulating column, 2. First terminal, 201. Static contact, 3. Second terminal, 301. Moving contact, 4. Conductive arm, 5. Positioning recess, 501. Cavity, 6. Extrusion protrusion, 601. Insulating connecting part, 7. Pressure spring, 8. Fixed limiting protrusion, 9. Movable limiting protrusion, 10. L-shaped fixing plate, 11. Fixing bolt, 12. Connecting hole, 13. Driving mechanism. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0025] A high-voltage disconnector comprises two insulating columns 1 with a spacing therebetween, a first terminal 2 and a second terminal 3 being fixedly mounted on the tops of the two insulating columns 1, a static contact 201 being fixedly connected to the tops of the first terminal 2, two conductive arms 4 being hinged on the static contact 201, a moving contact 301 being fixedly connected to the tops of the second terminal 3, and ends of the two conductive arms 4 away from the static contact 201 respectively abutting against two sides of the moving contact 301.

[0026] The second terminal block 3 is provided with a positioning recess 5, and movable extrusion protrusions 6 are provided on both sides of the inner wall of the positioning recess 5. The top of the extrusion protrusion 6 is inclined, and the extrusion protrusion 6 is used to squeeze the conductive arm 4 toward the moving contact 301, so that the conductive arm 4 and the moving contact 301 are in contact with each other.

[0027] like Figure 1 The high-voltage disconnector also includes a driving mechanism 13 located between the two insulating columns 1. The top of the driving mechanism 13 is hinged to the conductive arm 4. The conductive arm 4 can be rotated by pulling the conductive arm 4 upward or downward by the driving arm, thereby realizing the closing and separation of the conductive arm 4 and the moving contact 301. The driving mechanism 13 is a prior art and will not be described in detail here.

[0028] A cavity 501 is formed on both sides of the inner wall of the positioning recess 5 , and an extrusion protrusion 6 is arranged in the cavity 501 . A pressure spring 7 is fixedly connected to the inner surface of the cavity 501 , and the pressure spring 7 is used to apply pressure to the extrusion protrusion 6 in a direction close to the conductive arm 4 .

[0029] like Figure 2 , Figure 4 and Figure 5 One side of the extrusion protrusion 6 is located in the cavity 501 , and the other side is located outside the cavity 501 . The side of the extrusion protrusion 6 located outside the cavity 501 abuts against the conductive arm 4 .

[0030] The extrusion protrusion 6 is provided with an insulating connection portion 601 , and one end of the pressure spring 7 away from the inner surface of the cavity 501 is fixedly connected to the insulating connection portion 601 .

[0031] like Figure 2 , Figure 4 and Figure 5 The pressure spring 7 is fixed on the extrusion cam 6 by embedding, and serves as a connecting surface between the pressure spring 7 and the extrusion cam 6 .

[0032] Both sides of the inner wall of the cavity 501 are fixedly connected with fixed limiting protrusions 8 , and both sides of the extrusion protrusion 6 are fixedly connected with movable limiting protrusions 9 used in conjunction with the fixed limiting protrusions 8 .

[0033] like Figure 2 , Figure 4 and Figure 5 The fixed limiting protrusion 8 is located on the outside of the movable limiting protrusion 9, and can limit the movement of the movable limiting protrusion 9, so that the movable limiting protrusion 9 and the movable limiting protrusion 9 fixed to the extrusion protrusion 6 cannot be completely detached from the inside of the cavity 501.

[0034] An L-shaped fixing plate 10 is fixedly connected to the side of the positioning recess 5 away from the conductive arm 4, and a fixing bolt 11 is arranged on the horizontal end of the L-shaped fixing plate 10. The bottom of the fixing bolt 11 passes through the L-shaped fixing plate 10 and is threadedly connected to the second wiring terminal 3, so as to fix the L-shaped fixing plate 10 and the positioning recess 5 to the second wiring terminal 3.

[0035] like Figure 2 and Figure 3 , the screw hole on the second terminal 3 is used to realize the threaded connection with the fixing bolt 11, the fixing bolt 11 fixes the L-shaped fixing plate 10 on the second terminal 3, the L-shaped fixing plate 10 and the positioning recess 5 are fixed, and the positioning recess 5 is fixed at the same time.

[0036] The first wiring terminal 2 and the second wiring terminal 3 are both provided with a connection hole 12 , and the connection hole 12 is used to assist in connecting an external circuit with the first wiring terminal 2 and the second wiring terminal 3 .

[0037] like Figure 1 and Figure 2The terminal of the external circuit can be fixed to the first wiring terminal 2 or the second wiring terminal 3 by passing a bolt through the connection hole 12.

[0038] The working principle of a high voltage isolating switch provided by the utility model is as follows:

[0039] When one end of the conductive arm 4 rotates upward, the conductive arm 4 will be separated from the inner side of the positioning recess 5, and will no longer be in contact with the extrusion protrusion 6 and the moving contact 301, and the conductive arm 4 and the moving contact 301 will be separated;

[0040] When one end of the conductive arm 4 rotates downward, the conductive arm 4 will press down the inclined surface of the extrusion protrusion 6, the extrusion protrusion 6 is compressed and compresses the pressure spring 7, the pressure spring 7 is compressed and contracts, and the extrusion protrusion 6 moves toward the inside of the cavity 501. At this time, one end of the conductive arm 4 can be rotated to between the extrusion protrusion 6 and the moving contact 301; then the pressure spring 7 extends and pushes the extrusion protrusion 6, and the extrusion protrusion 6 squeezes the conductive arm 4, so that the conductive arm 4 and the moving contact 301 fit tightly, and the connection between the conductive arm 4 and the moving contact 301 is not easy to loosen.

[0041] Compared with the related art, the high voltage isolating switch provided by the utility model has the following beneficial effects:

[0042] In the present invention, when one end of the conductive arm 4 is connected to the moving contact 301, the extrusion protrusion 6 on the positioning recess 5 will squeeze the conductive arm 4 under the action of the pressure spring 7, so that the conductive arm 4 can maintain a close fit with the moving contact 301, effectively preventing the conductive arm 4 from being loosened from the moving contact 301, thereby ensuring the stability of the circuit connection. At the same time, when one end of the conductive arm 4 rotates and separates from the moving contact 301, the extrusion protrusion 6 will not block the rotation of the conductive arm 4, thereby ensuring that the high-voltage disconnector can be closed or separated normally.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high-voltage disconnector, comprising two insulating columns (1) with a spacing therebetween, wherein a first wiring terminal (2) and a second wiring terminal (3) are respectively fixedly mounted on the tops of the two insulating columns (1), characterized in that: The top of the first connecting terminal (2) is fixedly connected to a stationary contact (201), two conductive arms (4) are hingedly connected to the stationary contact (201), the top of the second connecting terminal (3) is fixedly connected to a moving contact (301), and ends of the two conductive arms (4) away from the stationary contact (201) respectively contact two sides of the moving contact (301); The second wiring terminal (3) is provided with a positioning recess (5), and movable extrusion protrusions (6) are provided on both sides of the inner wall of the positioning recess (5), and the top of the extrusion protrusion (6) is arranged inclined. The extrusion protrusion (6) is used to squeeze the conductive arm (4) in the direction of the movable contact (301), so that the conductive arm (4) and the movable contact (301) are in contact with each other.

2. A high voltage disconnect switch according to claim 1, characterized in that: Both sides of the inner wall of the positioning recess (5) are provided with cavities (501), the extrusion protrusion (6) is arranged in the cavity (501), and the inner surface of the cavity (501) is fixedly connected with a pressure spring (7), and the pressure spring (7) is used to apply pressure to the extrusion protrusion (6) in a direction close to the conductive arm (4).

3. A high voltage disconnector according to claim 2, characterized in that: The extrusion protrusion (6) is provided with an insulating connection portion (601), and one end of the pressure spring (7) away from the inner surface of the cavity (501) is fixedly connected to the insulating connection portion (601).

4. A high voltage disconnector according to claim 3, characterized in that: Both sides of the inner wall of the cavity (501) are fixedly connected with fixed limiting protrusions (8), and both sides of the extrusion protrusion (6) are fixedly connected with movable limiting protrusions (9) used in conjunction with the fixed limiting protrusions (8).

5. A high voltage disconnector according to claim 1, characterized in that: An L-shaped fixing plate (10) is fixedly connected to the side of the positioning recess (5) away from the conductive arm (4), a fixing bolt (11) is arranged on the horizontal end of the L-shaped fixing plate (10), the bottom of the fixing bolt (11) passes through the L-shaped fixing plate (10) and is threadedly connected to the second wiring terminal (3), so as to fix the L-shaped fixing plate (10) and the positioning recess (5) to the second wiring terminal (3).

6. A high voltage disconnect switch according to claim 1, characterized in that: The first wiring terminal (2) and the second wiring terminal (3) are both provided with connection holes (12), and the connection holes (12) are used to assist in connecting an external circuit with the first wiring terminal (2) and the second wiring terminal (3).

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