A high-voltage switchgear

Abstract

This invention provides a high-voltage switching device. A first high-voltage connection stationary terminal and a second high-voltage connection stationary terminal are fixed to the upper end of an insulating shell. A servo motor control circuit controls the rotation of the servo motor. The servo motor is fixedly connected to a servo motor disk, which is fixedly connected to a servo motor lever. The servo motor lever is movably connected to a swing arm, which is movably connected to a movable rod. A contact fixing block is fixedly connected to the second high-voltage contact and to the movable rod. The first high-voltage connection stationary terminal is connected to the second high-voltage contact via a flexible conductive strip. When the servo motor rotates, causing the movable rod to move upward, the second high-voltage contact moves upward synchronously and contacts the first high-voltage contact, closing the switching device. This invention can quickly and accurately control the closing and opening of the high-voltage contacts, meeting the needs of automated testing. Its compact structure also meets the need for miniaturization of high-voltage switching devices, facilitating application in space-constrained environments.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switches, and specifically to a high-voltage switch device. Background Technology

[0002] High-voltage pulse testing technology plays a crucial role in fields such as modern electrical equipment testing, new energy storage systems, and pulse power technology. With the continuous development of related technologies, there is an urgent need for miniaturization and automation of high-voltage pulse testing equipment, especially requiring pulse currents to reach over 10kA to meet the requirements of complex operating conditions and efficient testing.

[0003] Currently, high-voltage switches on the market that can meet the pulse waveform requirements of 20kV and above generally suffer from a large size. Due to limitations in structural design and material properties, these traditional high-voltage switches are difficult to adapt to space-constrained applications, severely hindering the miniaturization of high-voltage pulse testing equipment. Meanwhile, some miniaturized high-voltage switches that claim to meet withstand voltage requirements, while achieving some size optimization, have short internal contact distances, placing extremely high demands on the performance of their insulating casings. In practical applications, the insulating casings of these miniaturized high-voltage switches are highly susceptible to high-voltage breakdown. Once broken down, this will cause the high-voltage pulse to discharge to ground, damaging the testing equipment and posing a significant safety hazard to operators, making it impossible to guarantee the smooth progress of testing and personnel safety.

[0004] Given this situation, it is necessary to research a miniaturized high-voltage switchgear to address the aforementioned shortcomings. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a miniaturized high-voltage switchgear, solving the problem that existing high-voltage switchgear cannot simultaneously achieve miniaturization, safety and reliability, and tolerance to high pulse current output.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a high-voltage switching device, including an insulation structure, a driving mechanism, a buffer assembly, and a contact assembly; wherein:

[0008] The insulating structure includes an insulating shell; a first high-voltage connection stationary end and a second high-voltage connection stationary end are fixed to the upper end of the insulating shell; a drive mechanism, a buffer assembly, a first high-voltage contact, a second high-voltage contact, and a flexible conductive strip are disposed inside the insulating shell;

[0009] The drive mechanism includes a servo control circuit, a servo, a servo disk, a servo lever, and a rocker arm; the servo control circuit is electrically connected to the servo and is used to control the rotation of the servo; the servo is fixedly connected to the servo disk, the servo disk is fixedly connected to the servo lever, the servo lever is movably connected to the rocker arm, and the rocker arm is movably connected to a movable rod.

[0010] The buffer assembly includes a contact fixing block and a movable rod; the contact fixing block is fixedly connected to the second high-voltage contact, and the contact fixing block is connected to the movable rod; the contact fixing block is made of insulating material.

[0011] The contact assembly includes a first high-voltage contact, a second high-voltage contact, a first high-voltage connection stationary terminal, a second high-voltage connection stationary terminal, and a flexible conductive strip. The contact assembly is made of conductive material. One end of the flexible conductive strip is connected to the first high-voltage connection stationary terminal, and the other end is connected to the second high-voltage contact and the contact fixing block. The second high-voltage connection stationary terminal and the first high-voltage contact are fixedly connected, that is, the first high-voltage connection stationary terminal is connected to the second high-voltage contact through the flexible conductive strip.

[0012] When the servo motor rotates and drives the movable lever upward, the second high-voltage contact moves upward synchronously and then contacts the first high-voltage contact, thus closing the switch.

[0013] In this invention, the drive mechanism employs a combination of servo control circuitry and servo motors. The servo control circuit controls the rotation of the servo motor, which in turn drives the servo disc, servo lever, swing arm, and movable rod in a coordinated manner. This causes the second high-voltage contact to move upwards with the movable rod and contact the first high-voltage contact, achieving automatic closure of the switch. This device can quickly and accurately control the opening and closing of the high-voltage contacts, greatly improving the efficiency and accuracy of high-voltage pulse testing and meeting the needs of automated testing. Its compact structure also meets the miniaturization requirements of high-voltage switchgear, facilitating application in space-constrained environments. A flexible conductive strip connects the first high-voltage contact stationary terminal and the second high-voltage contact, ensuring good conductivity while maintaining contact distance to prevent breakdown and improve the overall performance and operational stability of the device. An insulating structure is used to secure the internal components and provide withstand voltage protection for the high-voltage switchgear. The fixed connections in the above device can be screw connections, snap-fit ​​connections, etc., while the movable connections can be screw rotation connections, transmission connections, etc.

[0014] As a technical solution, the buffer assembly further includes a spring cavity pressure plate, a contact spring, and a spring cavity disposed within the movable rod. The spring cavity pressure plate is fixedly connected to the movable rod. The contact spring is placed inside the spring cavity and connected to the contact fixing block through a hole in the spring cavity pressure plate, meaning that the contact fixing block moves with the stretching or compression of the contact spring.

[0015] Furthermore, when the first high-voltage contact and the second high-voltage contact come into contact, the contact spring is in a compressed state in the spring cavity. The buffer assembly ensures the contact pressure between the first high-voltage contact and the second high-voltage contact, ensuring a good electrical connection and buffering mechanical shocks. This avoids problems such as increased resistance, contact heating, and accelerated contact wear that affect service life due to poor contact. When it is necessary to disconnect the contact, the contact spring can provide a good restoring force, allowing the first high-voltage contact and the second high-voltage contact to separate quickly.

[0016] As a technical solution, the servo control circuit includes a power supply and a PWM control circuit. It uses pulse width control to control the rotation of the servo, which can achieve high-precision adjustment of the servo rotation angle and speed, making the automated operation of the high-voltage switch more accurate and stable, and effectively improving the efficiency and reliability of high-voltage pulse testing.

[0017] As a technical solution, the contact assembly uses AgSnO2 as the material, or a synthetic material made by adding rare metal elements to an AgSnO2 alloy. AgSnO2 material has good conductivity and resistance to arc erosion, which can effectively reduce arc erosion of the contacts during high-voltage pulse switching, reduce the increase in contact resistance and contact wear, and extend service life.

[0018] As a technical solution, the insulating shell includes an insulating cover plate, an insulating base plate, and insulating sidewalls; the first high-voltage connection stationary end and the second high-voltage connection stationary end are fixed on the insulating cover plate.

[0019] Furthermore, it also includes a servo mounting plate, which is fixed to the insulating sidewall. The servo is fixedly connected to the insulating base plate and the servo mounting plate to achieve effective fixation of the servo.

[0020] Furthermore, the servo control circuit is fixed to the insulating sidewall.

[0021] The beneficial effects of this utility model are as follows: This utility model provides a high-voltage switching device. A servo motor control circuit controls the rotation of a servo motor, which in turn drives a servo motor disc, servo motor lever, swing arm, and movable rod, causing the second high-voltage contact to move upward with the movable rod and contact the first high-voltage contact, thus achieving automatic closing of the switching device. When it is necessary to disconnect, the contact spring provides good restoring force, allowing the first and second high-voltage contacts to separate quickly. Using a flexible conductive strip to connect the first high-voltage connection stationary terminal and the second high-voltage contact ensures good conductivity while increasing the contact distance, preventing breakdown and improving the overall performance and operational stability of the device. This utility model can quickly and accurately control the closing and opening of the high-voltage contacts, meeting the needs of automated testing. Its compact structural layout also meets the miniaturization requirements of high-voltage switching devices, facilitating application in space-constrained environments. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the overall structure of the high-voltage switchgear in Example 1.

[0023] Appendix Figure 2 This is a schematic diagram of the internal structure of the high-voltage switchgear in Example 1.

[0024] Appendix Figure 3 This is a schematic diagram of the servo control circuit in Example 1.

[0025] Figure descriptions: 1: Servo control circuit; 2: First high-voltage connection stationary end; 3: Servo; 4: Insulating housing; 5: Insulating base plate; 6: Servo mounting plate; 7: Second high-voltage connection stationary end; 8: Insulating cover plate; 9: Flexible conductive strip; 10: First high-voltage contact; 11: Second high-voltage contact; 12: Contact fixing block; 13: Spring cavity pressure plate; 14: Contact spring; 15: Movable rod; 16: Swing rod; 17: Servo lever; 18: Servo disc. Detailed Implementation

[0026] Example 1

[0027] This embodiment discloses a high-voltage switching device, such as... Figure 1 and Figure 2 As shown, the assembly includes an insulating structure, a drive mechanism, a buffer assembly, and a contact assembly. The insulating structure includes an insulating shell 4 and a servo mounting plate 6. The drive mechanism includes a servo control circuit 1, a servo 3, a servo disc 18, a servo lever 17, and a swing arm 16. The buffer assembly includes a contact fixing block 12, a movable rod 15, a spring cavity pressure plate 13, a contact spring 14, and a spring cavity within the movable rod 15. The contact fixing block 12 is made of insulating material. The contact assembly includes a first high-voltage contact 10, a second high-voltage contact 11, a first high-voltage connection stationary end 2, a second high-voltage connection stationary end 7, and a flexible conductive strip 9. The material used for the contact assembly is AgSnO2. The insulating housing 4 includes an insulating cover plate 8, an insulating base plate 5, and insulating sidewalls. The first high-voltage connection stationary end 2 and the second high-voltage connection stationary end 7 are fixed to the insulating cover plate 8 by threads. The servo motor mounting plate 6 and the servo motor control circuit 1 are respectively fixed to the insulating sidewalls by screws. The servo motor 3 is fixed to the servo motor mounting plate 6 by screws, and the servo motor 3 is fixedly connected to the insulating base plate 5 by screws. The drive mechanism, buffer assembly, first high-voltage contact 10, second high-voltage contact 11, and flexible conductive strip 9 are disposed inside the insulating housing 4. The servo motor control circuit 1 is electrically connected to the servo motor 3 and is used to control the rotation of the servo motor 3. The servo motor control circuit 1 is as follows... Figure 3As shown, the system consists of a power supply and a PWM control circuit. Using pulse width modulation (PWM), a 500μs / 1ms trigger square wave signal causes the cam on the servo to rotate from horizontal to vertical. The servo 3 is fixedly connected to the servo disk 18 via a snap-fit, the servo disk 18 is fixedly connected to the servo lever 17 via screws, the servo lever 17 is movably connected to the rocker arm 16 via a screw, and the rocker arm 16 is movably connected to the movable rod 15 via a screw. The contact fixing block 12 is fixedly connected to the second high-voltage contact 11 via screws, and the contact fixing block 12 is elastically connected to the movable rod 15 via a contact spring 14. The spring cavity pressure plate 13 is fixedly connected to the movable rod 15 via threads or screws; the contact spring 14 is placed inside the spring cavity and connected to the contact fixing block 12 through a hole in the spring cavity pressure plate 13, allowing the contact fixing block 12 to move with the compression or extension of the spring. One end of the flexible conductive strip 9 is connected to the first high-voltage connection stationary end 2, and the other end is connected to the second high-voltage contact 11 and the contact fixing block 12. The second high-voltage connection stationary end 7 and the first high-voltage contact 10 are fixedly connected by threads. In this embodiment, when the servo motor 3 rotates and drives the movable rod 15 to move upward, the second high-voltage contact 11 moves upward synchronously and then contacts the first high-voltage contact 10, the high-voltage switch device closes, and the contact spring 14 is in a compressed state in the spring cavity.

[0028] The specific embodiments of this utility model have been described above with reference to the accompanying drawings. However, those skilled in the art should understand that the above embodiments are for illustrative purposes only and are not intended to limit the scope of this utility model. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this utility model. The scope of protection of this utility model is defined by the appended claims.

Claims

1. A high-voltage switchgear, characterized in that, Includes insulation structure, drive mechanism, buffer assembly, and contact assembly; among which, The insulating structure includes an insulating shell (4); a first high-voltage connection stationary end (2) and a second high-voltage connection stationary end (7) are fixed at the upper end of the insulating shell (4); a drive mechanism, a buffer assembly, a first high-voltage contact (10), a second high-voltage contact (11), and a flexible conductive strip (9) are disposed inside the insulating shell (4); The drive mechanism includes a servo control circuit (1), a servo (3), a servo disc (18), a servo lever (17), and a rocker arm (16); the servo control circuit (1) is electrically connected to the servo (3) and is used to control the rotation of the servo (3); the servo (3) is fixedly connected to the servo disc (18), the servo disc (18) is fixedly connected to the servo lever (17), the servo lever (17) is movably connected to the rocker arm (16), and the rocker arm (16) is movably connected to the movable rod (15); The buffer assembly includes a contact fixing block (12) and a movable rod (15); the contact fixing block (12) is fixedly connected to the second high-voltage contact (11), and the contact fixing block (12) is connected to the movable rod (15); the contact fixing block (12) is made of insulating material; The contact assembly includes a first high-voltage contact (10), a second high-voltage contact (11), a first high-voltage connection stationary end (2), a second high-voltage connection stationary end (7), and a flexible conductive strip (9). The contact assembly is made of conductive material. One end of the flexible conductive strip (9) is connected to the first high-voltage connection stationary end (2), and the other end is connected to the second high-voltage contact (11) and the contact fixing block (12). The second high-voltage connection stationary end (7) and the first high-voltage contact (10) are fixedly connected. When the servo motor (3) rotates and drives the movable rod (15) to move upward, the second high-voltage contact (11) moves upward synchronously and then comes into contact with the first high-voltage contact (10).

2. The high-voltage switchgear according to claim 1, characterized in that, The buffer assembly also includes a spring cavity pressure plate (13), a contact spring (14), and a spring cavity disposed in the movable rod (15). The spring cavity pressure plate (13) is fixedly connected to the movable rod (15). The contact spring (14) is placed in the spring cavity and is connected to the contact fixing block (12) through the hole of the spring cavity pressure plate (13).

3. A high-voltage switchgear according to claim 2, characterized in that, When the first high-voltage contact (10) and the second high-voltage contact (11) come into contact, the contact spring (14) is in a compressed state in the spring cavity.

4. A high-voltage switchgear according to claim 1, characterized in that, The servo control circuit (1) includes a power supply and a PWM control circuit, and uses pulse width control to control the rotation of the servo (3).

5. A high-voltage switchgear according to claim 1, characterized in that, The insulating shell (4) includes an insulating cover plate (8), an insulating base plate (5), and an insulating side wall; the first high-voltage connection stationary end (2) and the second high-voltage connection stationary end (7) are fixed on the insulating cover plate (8).

6. A high-voltage switchgear according to claim 5, characterized in that, It also includes a servo mounting plate (6), which is fixed on the insulating sidewall, and the servo (3) is fixedly connected to the insulating base plate (5) and the servo mounting plate (6) respectively.

7. A high-voltage switchgear according to claim 5, characterized in that, The servo control circuit (1) is fixed on the insulating sidewall.

8. A high-voltage switchgear according to claim 1, characterized in that, The servo motor (3) is fixedly connected to the servo motor disk (18) by a buckle or screw. The servo motor disk (18) is fixedly connected to the servo motor lever (17) by a screw. The servo motor lever (17) is movably connected to the swing arm (16) by a screw. The swing arm (16) is movably connected to the movable rod (15) by a screw. The contact fixing block (12) is fixedly connected to the second high-voltage contact (11) by a screw. The contact fixing block (12) is elastically connected to the movable rod (15) by a contact spring.

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