Multi-gear change-over switch

Abstract

The utility model discloses a multi-gear change-over switch, which comprises a plurality of static contacts, a moving contact, a moving contact connector, a pulse output metal piece and a driving piece, wherein the plurality of static contacts are arranged in the circumferential direction of the same diameter according to a preset interval, and different static contacts are connected with different metal wires in the plasma trigger gap through high-voltage wires; the moving contact connector is arranged on the center of a circle formed by the plurality of static contacts, and the moving contacts are arranged on the side wall of the moving contact connector; the lower end of the moving contact connector is connected with the driving piece, a central hole is formed in the pulse output metal piece, the upper end of the moving contact connector is placed in the central hole, and the pulse output metal piece is connected with an external high-voltage pulse common end; the driving part is used for driving the moving contact connector to rotate, and the moving contact connector drives the moving contact to move in the circumferential direction, so that the moving contact can be in contact with or separated from the static contacts at different positions according to requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrical appliances in power systems, and more specifically, to a multi-position conversion switch. Background Art

[0002] UHV converter transformers are the core equipment for energy conversion and transmission in UHV projects, and their reliability directly affects the safe and stable operation of UHV transmission systems. When an internal short circuit occurs in a UHV converter transformer, a high-energy arc in the oil will be generated, resulting in a large mechanical impact force and a large amount of high-temperature and high-pressure oil and gas, which can easily cause the converter transformer shell to crack and explode. The use of a metal wire explosion plasma trigger gap can transfer the oil arc in the UHV converter transformer to the plasma trigger gap within 1ms, clear the fault ultra-fast, improve the reliability and safety of the converter transformer, and effectively improve the safe and stable operation level of my country's UHV transmission system. The working principle of the metal wire explosion plasma trigger gap is to apply a high-voltage pulse to the inside of the trigger gap, detonate the metal wire embedded in the lower electrode of the trigger gap, and the metal wire ablates the internal insulating material to generate plasma that is ejected from the lower electrode nozzle to the upper electrode, triggering the gap to conduct.

[0003] The existing method of detonating the metal wire is to generate a high-voltage pulse from the common end of the external high-voltage pulse, and to control the opening and closing of a single-position conversion switch so that the high-voltage pulse is successfully transmitted or cannot be transmitted to the metal wire inside the plasma trigger gap, so as to realize whether the plasma trigger gap is conductive or not. However, since a single-position conversion switch can only be connected to one metal wire inside the plasma trigger gap, when there are different metal wires inside the metal wire explosion type plasma trigger gap, multiple single-position conversion switches are required to meet the requirements of the metal wire explosion plasma trigger gap rotation triggering, and the metal wire explosion is very complicated.

[0004] Therefore, there is an urgent need for a multi-speed conversion switch that can not only meet the gap rotation triggering requirements of the metal wire explosion plasma triggering, but also increase the convenience of the metal wire explosion. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides a multi-position switch, including: a plurality of static contacts, a moving contact, a moving contact connector, a pulse output metal part and a driving part;

[0006] A plurality of stationary contacts are arranged in a circumferential direction of the same diameter at preset intervals, and different stationary contacts are connected to different metal wires inside the plasma trigger gap through high-voltage wires;

[0007] The moving contact connector is arranged at the center of a circle formed by a plurality of stationary contacts, and the moving contact is arranged on a side wall of the moving contact connector;

[0008] The lower end of the moving contact connector is connected to the driving part, the pulse output metal part is provided with a center hole, the upper end of the moving contact connector is placed in the center hole, and the pulse output metal part is connected to the external high-voltage pulse common end;

[0009] The driving member is used to drive the moving contact connector to rotate, and drives the moving contact to move in a circumferential direction through the moving contact connector, so that the moving contact can contact or separate with the static contact at different positions according to needs.

[0010] Optionally, the multi-speed transfer switch further comprises: a bracket, a horizontal plate, four metal pillars, an epoxy insulating shaft, a first epoxy plate, a second epoxy plate and a coupling; wherein

[0011] The bracket and the driving member are arranged below the horizontal plate;

[0012] The horizontal plate is connected to the first epoxy plate and the second epoxy plate in a vertical direction through four metal pillars, and the first epoxy plate is arranged between the horizontal plate and the second epoxy plate;

[0013] The epoxy insulating shaft is arranged at the center of the horizontal plate and the first epoxy plate, and the moving contact connector, the plurality of stationary contacts and the moving contact are arranged above the first epoxy plate;

[0014] The upper end of the epoxy insulating shaft is connected to the moving contact connector, and the lower end of the epoxy insulating shaft is connected to the driving member through a coupling;

[0015] The pulse output metal piece is arranged above the second epoxy plate.

[0016] Optionally, a mounting hole is provided at the center of the first epoxy plate, and the upper end of the epoxy insulating shaft is connected to the moving contact connector through the mounting hole.

[0017] Optionally, an axle pin is used to connect the moving contact connector and the epoxy insulation shaft.

[0018] Optionally, the multi-speed conversion switch further includes an absolute value encoder, which is installed at the upper end of the transverse plate.

[0019] Optionally, the moving contact is designed as an incomplete circular ring structure.

[0020] Optionally, a plurality of contact spring grooves are processed on the moving contact, and each contact spring groove is used for installing a contact spring.

[0021] Optionally, the moving contact is made of copper.

[0022] Optionally, the multi-speed transfer switch further comprises an epoxy insulating ring connected to the moving contact, and during the rotation of the moving contact, the epoxy insulating ring rotates together with the moving contact.

[0023] Optionally, the moving contact and the moving contact connector are threadedly connected by a contact connecting rod made of copper alloy, and the threads at both ends of the contact connecting rod are left-handed and right-handed threads respectively.

[0024] Optionally, a plurality of gears are arranged on the first epoxy plate in the circumferential direction of the same diameter, a static contact block is placed at each gear, a threaded connection hole is arranged on the static contact block, and the static contact block is threadedly connected to the first epoxy plate through the threaded connection hole.

[0025] Optionally, the stationary contact block is in a flat U-shape, and a contact hole through which the moving contact can rotate and a connection hole for connecting with an external high-voltage wire are arranged at the center of the stationary contact block.

[0026] Optionally, the driving component includes a motor reducer and a motor, wherein the motor is used to provide power, and the motor reducer is used to reduce the power provided by the motor and then transmit it to the moving contact connector.

[0027] The utility model provides a multi-position conversion switch. When a high-voltage pulse needs to be output to one of the metal wires inside the plasma trigger gap, the driving member can be used to drive the moving contact connector to rotate, and the moving contact connector drives the moving contact to move in the circumferential direction, so that the moving contact contacts the static contact connected to the metal wire. At this time, the multi-position conversion switch is in a closed position, and the high-voltage pulse generated by the common end of the external high-voltage pulse can be transmitted to the metal wire connected to the static contact through the multi-position conversion switch, so that the metal wire is burned and exploded, and the trigger gap is turned on. When the moving contact is separated from any static contact under the driving of the driving member, the multi-position conversion switch is in an open position, and the high-voltage pulse cannot be transmitted to the metal wire through the multi-position conversion switch, and the trigger gap cannot be turned on. Similarly, when the moving contact contacts another static contact under the driving of the driving member, the multi-position conversion switch is in a closed position again, and the high-voltage pulse can apply a high-voltage pulse to another metal wire through the multi-position conversion switch, so that the other metal wire is burned and exploded, and the automatic switching of the burning and explosion of different metal wires in the plasma trigger gap is realized. Therefore, the utility model can apply high-voltage pulses to different metal wires inside the plasma trigger gap in turn through only one multi-speed conversion switch, which can not only meet the rotation triggering requirements of the metal wire explosion plasma trigger gap, but also increase the convenience of metal wire explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By referring to the following drawings, the exemplary embodiments of the present invention can be more fully understood:

[0029] Figure 1 The utility model discloses a schematic diagram of the overall structure of a multi-position conversion switch. DETAILED DESCRIPTION

[0030] The embodiments of the utility model will be described in detail below. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. 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.

[0031] like Figure 1 As shown, the utility model provides a multi-speed conversion switch, including: multiple static contacts 13, a moving contact 10, a moving contact connector 6, a pulse output metal piece 8 and a driving piece; wherein the multiple static contacts 13 are arranged in the circumferential direction of the same diameter according to a preset interval, and different static contacts 13 are connected to different metal wires inside the plasma trigger gap through high-voltage wires; the moving contact connector 6 is arranged on the center of a circle formed by the multiple static contacts 13, and the moving contact 10 is arranged on the side wall of the moving contact connector 6; the lower end of the moving contact connector 6 is connected to the driving piece, the pulse output metal piece 8 is provided with a center hole, the upper end of the moving contact connector 6 is placed in the center hole, and the pulse output metal piece 8 is connected to the external high-voltage pulse common end; the driving piece is used to drive the moving contact connector 6 to rotate, and drive the moving contact 10 to move in the circumferential direction through the moving contact connector 6, so that the moving contact 10 can contact or separate with the static contacts 13 at different positions according to needs.

[0032] In the embodiment of the utility model, when it is necessary to output a high-voltage pulse to one of the metal wires inside the plasma trigger gap, the moving contact connector 6 can be driven to rotate by the driving member, and the moving contact 10 can be driven to move in the circumferential direction by the moving contact connector 6, so that the moving contact 10 contacts the static contact 13 connected to the metal wire. At this time, the multi-speed conversion switch is in the closed position, and the high-voltage pulse generated by the common end of the external high-voltage pulse can be transmitted to the metal wire connected to the static contact 13 through the multi-speed conversion switch, so that the metal wire is ignited and the trigger gap is turned on. When the moving contact 10 is separated from any static contact under the drive of the driving member, the multi-speed conversion switch is in the open position, and the high-voltage pulse cannot be transmitted to the metal wire through the multi-speed conversion switch, and the trigger gap cannot be turned on. Similarly, when the moving contact 10 contacts another static contact 13 driven by the driving member, the multi-position conversion switch is in the closed position again, and the high-voltage pulse can be applied to another metal wire through the multi-position conversion switch to make the other metal wire explode, thus realizing the automatic switching of the explosion of different metal wires in the plasma trigger gap. Therefore, the utility model can make the high-voltage pulse be applied to different metal wires in the plasma trigger gap in turn through only one multi-position conversion switch, which can not only meet the rotation triggering requirements of the metal wire explosion plasma trigger gap, but also increase the convenience of the metal wire explosion.

[0033] Optionally, the multi-speed switching switch also includes: a bracket 1, a horizontal plate 2, four metal pillars 3, an epoxy insulating shaft 5, a first epoxy plate 14, a second epoxy plate 9 and a coupling 15; wherein the bracket 1 and the driving member are arranged below the horizontal plate 2; the horizontal plate 2 is connected to the first epoxy plate 14 and the second epoxy plate 9 in the vertical direction through four metal pillars 3, and the first epoxy plate 14 is arranged between the horizontal plate 2 and the second epoxy plate 9; the epoxy insulating shaft 5 is arranged at the center position of the horizontal plate 2 and the first epoxy plate 14, and the moving contact connector 6, a plurality of static contacts 13 and the moving contact 10 are arranged above the first epoxy plate 14; the upper end of the epoxy insulating shaft 5 is connected to the moving contact connector 6, and the lower end of the epoxy insulating shaft 5 is connected to the driving member through the coupling 15; the pulse output metal part 8 is arranged above the second epoxy plate 9.

[0034] In the embodiment of the utility model, the multi-speed conversion switch is a layered structure, including a bottom layer, a middle layer and a top layer. The bottom layer is a fixed layer, and the fixed layer includes a horizontal plate 2 and a bracket 1. The middle layer is the core layer of the multi-speed conversion switch. In terms of electrical connection, considering that the potential of the fixed layer belongs to the ground potential, the contact of the middle layer is a high potential. Since the potentials of the bottom layer and the middle layer are inconsistent, the middle layer and the bottom layer need to be connected by an epoxy insulating shaft 5 of insulating material. The middle layer and the middle layer use a coupling 15 to connect the epoxy insulating shaft 5 of the middle layer with the motor reducer 16 shaft to transmit the motor power; the middle layer uses a first epoxy plate 14, and the first epoxy plate 14 is connected to the bottom layer through four metal pillars 3. The metal pillars 3 are provided with shaft shoulders to realize the up and down positioning of the first epoxy plate 14. The top layer is the output layer, including the second epoxy plate 9 and the pulse output metal part 8. The four metal pillars 3 of the multi-speed switch are covered with four insulating rings 12. The second epoxy plate 9 is installed on the upper end of the insulating ring 12 to realize the up and down positioning of the second epoxy plate 9. The second epoxy plate 9 is fixed with a nut on the top of the insulating ring 12; the second epoxy plate 9 is used to fix the pulse output metal part 8. The top of the pulse output metal part 8 is connected to the high-voltage pulse and a center hole is set; a contact spring is installed on the upper end of the moving contact connector 6. When the motor 17 connected to the motor reducer 16 drives the moving contact connector 6 to rotate, the upper end of the moving contact connector 6 rotates inside the center hole of the pulse output metal part 8 to complete the high-voltage pulse output.

[0035] Optionally, a mounting hole is provided at the center of the first epoxy plate 14 , and the upper end of the epoxy insulating shaft 5 is connected to the moving contact connector 6 through the mounting hole.

[0036] In the embodiment of the utility model, a mounting hole is provided at the center of the first epoxy plate 14 , and the epoxy insulating shaft 5 is threadedly connected to the moving contact connector 6 through the mounting hole of the first epoxy plate 14 .

[0037] Optionally, an axle pin is used to connect the moving contact connector 6 and the epoxy insulating shaft 5, so that the moving contact 10 can rotate in both forward and reverse directions.

[0038] In some specific embodiments, the pulse output metal member 8 is a T-shaped structure.

[0039] Optionally, the multi-speed conversion switch further includes an absolute value encoder 4 , which is mounted on the upper end of the transverse plate 2 .

[0040] In the embodiment of the utility model, in order to feed back the switch position to the front-end controller, the multi-position switch is provided with an absolute encoder 4 , and the absolute encoder 4 is installed at the upper end of the transverse plate 2 .

[0041] Optionally, the moving contact 10 is designed as an incomplete circular ring structure.

[0042] In the embodiment of the utility model, since the conversion switch is a multi-position (gear) switch, the moving contact 10 can only contact one of the static contacts 13 at the same time, so the moving contact 10 is designed as an incomplete circular ring structure.

[0043] Optionally, a plurality of contact spring slots are processed on the moving contact 10, and each contact spring slot is used to install a contact spring, so that the contact current between the moving and static contacts is reduced by the contact spring.

[0044] Optionally, the material of the moving contact 10 is copper.

[0045] Optionally, the multi-speed conversion switch further comprises an epoxy insulating ring 7 connected to the moving contact 10 . During the rotation of the moving contact 10 , the epoxy insulating ring 7 rotates together with the moving contact 10 , thereby increasing the stability of the moving contact 10 during rotation.

[0046] Optionally, the moving contact 10 and the moving contact connector 6 are threadedly connected by a contact connecting rod 11 made of copper alloy material, and the threads at both ends of the contact connecting rod 11 are left-handed and right-handed threads respectively.

[0047] In the embodiment of the utility model, the moving contact 10 and the moving contact connector 6 are threadedly connected by a contact connecting rod 11 made of copper alloy material, and the threads at both ends of the contact connecting rod 11 are left-handed and right-handed threads respectively, so as to facilitate the adjustment of the centering between the moving contact 10 and the static contact 13 during the assembly process.

[0048] Optionally, a plurality of gears are arranged on the first epoxy plate 14 in the circumferential direction of the same diameter, a static contact block is placed in each gear, a threaded connection hole is arranged in the static contact block, and the static contact block is threadedly connected to the first epoxy plate 14 through the threaded connection hole.

[0049] In the embodiment of the utility model, the threaded connection hole is designed as a waist hole so as to adjust the centering between the moving contact 10 and the static contact 13 during the installation process.

[0050] Optionally, the stationary contact block is in a flat U-shape, and a contact hole through which the moving contact 10 can rotate and a connection hole for connecting with an external high-voltage wire are arranged at the center of the stationary contact block.

[0051] Optionally, the driving component includes a motor reducer 16 and a motor 17 , wherein the motor 17 is used to provide power, and the motor reducer 16 is used to transmit the power provided by the motor 17 to the moving contact connector 6 after reducing the power.

[0052] In summary, the utility model provides a multi-position conversion switch. When a high-voltage pulse needs to be output to one of the metal wires inside the plasma trigger gap, the driving member can be used to drive the moving contact connector to rotate, and the moving contact connector drives the moving contact to move in the circumferential direction, so that the moving contact contacts the static contact connected to the metal wire. At this time, the multi-position conversion switch is in a closed position, and the high-voltage pulse generated by the common end of the external high-voltage pulse can be transmitted to the metal wire connected to the static contact through the multi-position conversion switch, so that the metal wire burns and explodes, and the trigger gap is turned on. When the moving contact is separated from any static contact under the driving of the driving member, the multi-position conversion switch is in an open position, and the high-voltage pulse cannot be transmitted to the metal wire through the multi-position conversion switch, and the trigger gap cannot be turned on. Similarly, when the moving contact contacts another static contact under the driving of the driving member, the multi-position conversion switch is in a closed position again, and the high-voltage pulse can apply a high-voltage pulse to another metal wire through the multi-position conversion switch, so that the other metal wire burns and explodes, and the automatic switching of different metal wires in the plasma trigger gap is realized. Therefore, the utility model can apply high-voltage pulses to different metal wires inside the plasma trigger gap in turn through only one multi-speed conversion switch, which can not only meet the rotation triggering requirements of the metal wire explosion plasma trigger gap, but also increase the convenience of metal wire explosion.

[0053] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the utility model to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A multi-position switch, characterized in that: include: A plurality of stationary contacts (13), a moving contact (10), a moving contact connector (6), a pulse output metal part (8) and a driving part; in A plurality of stationary contacts (13) are arranged at preset intervals in the circumferential direction of the same diameter, and different stationary contacts (13) are connected to different metal wires inside the plasma triggering gap via high-voltage wires; The moving contact connector (6) is arranged at the center of a circle formed by a plurality of stationary contacts (13), and the moving contact (10) is arranged on a side wall of the moving contact connector (6); The lower end of the moving contact connector (6) is connected to the driving member, the pulse output metal member (8) is provided with a center hole, the upper end of the moving contact connector (6) is placed in the center hole, and the pulse output metal member (8) is connected to an external high-voltage pulse common end; The driving member is used to drive the moving contact connector (6) to rotate, and drives the moving contact (10) to move in a circumferential direction through the moving contact connector (6), so that the moving contact (10) can contact or separate from the stationary contact (13) at different positions according to needs.

2. The multi-position switch according to claim 1, characterized in that: Also includes: A bracket (1), a horizontal plate (2), four metal pillars (3), an epoxy insulating shaft (5), a first epoxy plate (14), a second epoxy plate (9) and a coupling (15); wherein The bracket (1) and the driving member are arranged below the horizontal plate (2); The horizontal plate (2) is connected to the first epoxy plate (14) and the second epoxy plate (9) in a vertical direction through four metal pillars (3), and the first epoxy plate (14) is arranged between the horizontal plate (2) and the second epoxy plate (9); The epoxy insulating shaft (5) is arranged at the center of the horizontal plate (2) and the first epoxy plate (14), and the moving contact connector (6), a plurality of stationary contacts (13) and the moving contact (10) are arranged above the first epoxy plate (14); The upper end of the epoxy insulating shaft (5) is connected to the moving contact connector (6), and the lower end of the epoxy insulating shaft (5) is connected to the driving member through a coupling (15); The pulse output metal piece (8) is arranged above the second epoxy plate (9).

3. The multi-position switch according to claim 2, characterized in that: A mounting hole is provided at the center of the first epoxy plate (14), and the upper end of the epoxy insulating shaft (5) is connected to the moving contact connector (6) through the mounting hole.

4. The multi-position switch according to claim 3, characterized in that: The moving contact connector (6) and the epoxy insulation shaft (5) are connected by an axis pin.

5. The multi-position switch according to claim 1, characterized in that: It also includes an absolute value encoder (4), which is installed on the upper end of the horizontal plate (2).

6. The multi-position switch according to claim 1, characterized in that: The moving contact (10) is designed as a non-complete circular ring structure.

7. The multi-position switch according to claim 1, characterized in that: A plurality of contact spring slots are processed on the moving contact (10), and each contact spring slot is used for installing a contact spring.

8. The multi-position switch according to claim 1, characterized in that: The material of the moving contact (10) is copper.

9. The multi-position switch according to claim 1, characterized in that: It also includes an epoxy insulating ring (7) connected to the moving contact (10); during the rotation of the moving contact (10), the epoxy insulating ring (7) and the moving contact (10) rotate together.

10. The multi-position switch according to claim 1, characterized in that: The moving contact (10) and the moving contact connector (6) are threadedly connected by a contact connecting rod (11) made of a copper alloy material, and the threads at both ends of the contact connecting rod (11) are left-handed and right-handed threads respectively.

11. The multi-position switch according to claim 1, characterized in that: A plurality of gears are arranged on the first epoxy plate (14) in the circumferential direction of the same diameter, a static contact block is placed in each gear, a threaded connection hole is arranged on the static contact block, and the static contact block is threadedly connected to the first epoxy plate (14) through the threaded connection hole.

12. The multi-position switch according to claim 11, characterized in that: The stationary contact block is in a flat U-shape, and a contact hole through which the moving contact (10) can rotate and pass, and a connection hole for connecting with an external high-voltage wire are arranged at the center of the stationary contact block.

13. The multi-position switch according to claim 1, characterized in that: The driving member comprises a motor reducer (16) and a motor (17), wherein the motor (17) is used to provide power, and the motor reducer (16) is used to transmit the power provided by the motor (17) to the moving contact connector (6) after reducing the power.

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