Indoor high-voltage grounding switch

Abstract

The application discloses an indoor high-voltage grounding switch, which comprises a vacuum box body, a lock rod, an electric connection seat and an electromagnetic driving assembly. The vacuum box body is connected with a sealing cover box on one side, and a guide rod and an explosion protection mechanism are arranged in the sealing cover box. The electromagnetic driving assembly slides along the guide rod and drives the lock rod to move. The lock rod is connected with an electrode through a first insulation terminal. The electric connection seat comprises an axle support, a movable guide support, a screw sleeve ring and a rotating seat. The screw sleeve ring is threadedly connected with the lock rod. A second insulation terminal and a grounding electrode are arranged on the rotating seat to realize circuit grounding. The explosion protection mechanism comprises a fixed cylinder, a plunger rod, a short-circuit control electrode and an explosive. In an abnormal state, the explosion protection mechanism triggers explosion to propel the lock rod to force grounding. The application has a double-trigger control mode. In a normal state, the electromagnetic assembly is driven. In an abnormal state, emergency grounding is realized through explosive gas, and the response is fast. Meanwhile, the contact stability is enhanced through a threaded locking structure, and the system safety and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grounding switches, in particular to an indoor high-voltage grounding switch. BACKGROUND

[0002] In the existing power system, the high-voltage grounding switch, as a key safety protection device in the power transmission and distribution network, is mainly used to provide an effective grounding path in the device maintenance or fault state to prevent damage to the device and personnel caused by residual charge or overvoltage. The traditional high-voltage grounding switch structure usually includes a manual or electric mechanical driving mechanism, a single control mode (such as motor drive or pneumatic drive), a one-way action mechanism (only supporting normal closing or opening), and a simple contact structure such as a sliding or spring buckle type electrode connection.

[0003] In the traditional structure, electromagnetic drive is often used to control the action of the locking rod or the contact part, but it only relies on single power control, and once the control system fails or encounters external strong interference, it may cause grounding failure. In addition, some products use mechanical spring energy storage to switch action, and the reaction speed is limited by the elastic structure, and the spring is prone to performance degradation after long-term use, which cannot guarantee reliable action in extreme conditions. Furthermore, the traditional contact part often uses a planar butt joint or a compression type structure, which lacks self-locking ability and is easily affected by external factors such as vibration and electromagnetic disturbance, causing the electrode to loosen, which may cause incomplete grounding or excessive contact resistance.

[0004] Therefore, the existing problems are studied and improved, and an indoor high-voltage grounding switch is provided to solve the existing problems, and through the technology, the problems are solved and the practical value is improved. SUMMARY

[0005] The present application provides an indoor high-voltage grounding switch suitable for high-voltage power transmission and distribution systems, which has electromagnetic drive and explosive pneumatic dual trigger mechanism, has the advantages of rapid response, reliable grounding and flexible control, and can still guarantee the grounding safety of equipment and personnel in abnormal or fault state.

[0006] The present application provides an indoor high-voltage grounding switch, which comprises a vacuum box body, a locking rod, an electrical contact seat and an electromagnetic drive assembly.

[0007] One side of the vacuum box body is fixedly connected with a sealing cover box, the inner side of the sealing cover box is provided with a guide rod for guiding the sliding of the electromagnetic drive assembly, and the inner side of the sealing cover box is fixedly installed with an initiation protection mechanism.

[0008] One end of the lock rod is provided with a first insulating terminal fixed to the surface of the electromagnetic drive assembly, and the surface of the first insulating terminal is provided with an access electrode electrically connected with the lock rod.

[0009] The electromagnetic drive assembly comprises a disc seat, an excitation disc and a plurality of magnetic blocks fixed to the inner side of the disc seat, the excitation disc is arranged on both sides of the magnetic blocks, and the surface of the excitation disc is provided with excitation coils opposite to the surface of the magnetic blocks.

[0010] The power connection seat comprises an axle support, a movable guide support, a screw sleeve ring and a rotating seat, one side of the movable guide support is provided with a sliding rod and penetrates through the surface of the vacuum box body for guiding the sliding of the movable guide support, one side of the movable guide support is provided with a spring connected with the inner wall of the vacuum box body, the screw sleeve ring is slidingly installed on one side of the rotating seat, and the other side of the rotating seat is provided with a second insulating terminal and is connected with a grounding electrode, the opposite surfaces of the screw sleeve ring and the movable guide support are provided with a movable gear disc and a fixed gear disc abutting each other, and the screw hole in the inner side of the screw sleeve ring is matched with the threads on the surface of the lock rod. Through the cooperation of electromagnetic drive and thread propulsion, the linear sliding action of the high-voltage grounding switch is realized, the stability of movement is ensured, the structural fastening is enhanced, and the reliability of contact conduction is effectively improved.

[0011] In a preferred example, the initiation protection mechanism comprises a fixed cylinder, a plunger rod and a short-circuit control electrode fixed to the surface of the fixed cylinder, the end of the short-circuit control electrode is connected with an initiating explosive located in the inner side of the fixed cylinder, one end of the plunger rod is slidingly sleeved in the inner side of the fixed cylinder, the fixed cylinder is fixed to the inner side of the sealed cover box, and one end of the plunger rod is arranged opposite to the electromagnetic drive assembly. Through the structure, when the electric control fails or a short circuit occurs, the plunger rod can be quickly driven to act through explosive driving, ensuring that the emergency grounding does not depend on the power supply and enhancing the anti-failure capability of the system.

[0012] In a preferred example, the end of the short-circuit control electrode is used for connecting a control circuit, the initiating explosive is ignited under the triggering of a short-circuit signal, the initiating explosive is a sodium azide particle structure, a large amount of gas is generated after ignition, and the plunger rod, the electromagnetic drive assembly and the lock rod are synchronously linearly moved. The mechanical action is realized by the instantaneous release of high-energy gas, the response speed is fast, the grounding operation can be completed in a very short time, and secondary electrical damage caused by delay is avoided.

[0013] In a preferred example, the surface of the excitation disc is provided with a wing plate slidingly sleeved on the surface of the guide rod, and the input end of the excitation disc is connected with a controller for passing alternating current through the excitation coil according to instructions. The sliding sleeve mode is adopted to cooperate with the guide rod, ensuring that the rotating motion has good linear guiding performance, so that the joint process is more stable and reliable.

[0014] In a preferred example, the spring is a tensile spring structure, both ends of which are connected to the inner wall of the vacuum box and the moving guide frame and are in a tensile state, and the movable gear disc and the fixed gear disc are ratchet structures for inhibiting the free rotation of the screw sleeve ring. The spring structure provides stable restoring force, and the ratchet design prevents the screw sleeve ring from loosening due to vibration or disturbance during contact, thereby improving the stability of the overall connection.

[0015] In a preferred example, one side of the sliding block is provided with a sliding pin for guiding the linear sliding of the screw sleeve ring along the surface thereof. The sliding pin design enables the screw sleeve ring to stably advance along the specified trajectory, ensures the smoothness of the thread engagement between the screw sleeve ring and the lock rod, and improves the mechanical coordination of the grounding action.

[0016] In a preferred example, the end portions of the access electrode and the grounding electrode respectively penetrate the sealing cover box and the vacuum box, and are used for connecting the control circuit and the grounding system. This design enables the efficient introduction or extraction of high-voltage current from the external circuit, simplifies the overall wiring structure, and facilitates the unified maintenance of the external interface.

[0017] In a preferred example, the vacuum box and the sealing cover box are transparent acrylic members, and the interiors thereof are in a state of air thinning or vacuum. The vacuum and transparent structure work together to effectively suppress the generation of electric arcs, improve the insulation strength, and facilitate non-invasive visual inspection and state monitoring.

[0018] The present application has the following beneficial effects:

[0019] 1. In the present application, two control modes of electromagnetic drive triggering and initiation protection mechanism triggering are provided. The electromagnetic triggering is used for automatic operation in the state of a conventional control system and is suitable for daily on-off switch occasions. The initiation triggering mechanism is used for emergency grounding response in abnormal states (such as short circuit, high temperature, etc.). Through the double triggering mechanism, even in the extreme case that the control system fails or cannot normally send electrical signals, emergency grounding can still be achieved by relying on explosive gas drive, which significantly improves the safety redundancy and operation reliability of the equipment and is suitable for high safety level requirements of power system environment.

[0020] 2. In the present application, the initiation protection mechanism is triggered by the short-circuit control electrode to release high-pressure gas to push the plunger rod to act instantaneously, which can drive the lock rod to complete linear contact in a short time and realize rapid grounding. Compared with the traditional way of relying on mechanical spring energy storage release or complex electric control execution structure, the response speed is greatly improved, the safety risks such as breakdown and flashover caused by grounding delay of high-voltage system are effectively reduced, the current is quickly discharged to the ground at the moment of fault occurrence, and the overall anti-fault ability of the system is improved.

[0021] 3. In this invention, a threaded engagement structure between the threaded sleeve ring and the locking rod is adopted, enabling the locking rod to achieve precise axial positioning along the guide (guide rod) during rotational advancement, and automatically forming a structural fastener after contacting the grounding electrode. This structure not only increases the contact pressure between the end of the locking rod and the surface of the grounding electrode, ensuring effective conduction of the grounding current, but also avoids contact loosening or instability under external vibration, electromagnetic interference, or short-term reaction forces, greatly improving the structural stability and electrical connection reliability in the engagement state. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the locking rod and the electrical connector structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the detonation protection mechanism according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of an electromagnetic drive assembly and a grounding socket according to an embodiment of the present invention;

[0026] Figure 5 This is an exploded view of the grounding socket according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the screw sleeve and swivel structure according to an embodiment of the present invention;

[0028] Figure 7 This is an exploded structural diagram of an electromagnetic drive component according to an embodiment of the present invention.

[0029] Figure label:

[0030] 100. Vacuum box; 110. Sealed cover; 120. Detonation protection mechanism; 111. Guide rod; 121. Fixed cylinder; 122. Plunger rod; 123. Short-circuit control electrode; 124. Detonating charge;

[0031] 200, Locking rod; 210, First insulating terminal; 220, Connecting electrode;

[0032] 300. Electrical connector; 310. Shaft bracket; 320. Moving guide; 330. Threaded sleeve; 340. Rotary base; 321. Spring; 322. Fixed gear plate; 331. Moving gear plate; 341. Second insulating terminal; 342. Grounding electrode;

[0033] 400. Electromagnetic drive assembly; 410. Disk base; 420. Excitation disk; 430. Magnetic block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0036] The following is in conjunction with the appendix Figures 1-7 This invention describes an indoor high-voltage grounding switch provided by some embodiments of the invention. Example 1:

[0037] This embodiment provides an indoor high-voltage grounding switch, including:

[0038] Vacuum box 100: This is the outer shell component, used to provide overall mechanical support and electrical insulation protection. It is made of transparent acrylic material and creates a vacuum environment by drawing a vacuum or filling with inert gas, thereby enhancing the overall insulation performance of the equipment.

[0039] Sealed cover box 110: Fixedly connected to one end of vacuum box 100, it also adopts a transparent acrylic material closed structure to form a highly airtight cavity. Guide rods 111 are installed on its inner wall to guide the sliding parts to move axially. Guide rods 111: Penetrating the interior of sealed cover box 110, they are the track for the sliding of electromagnetic drive assembly 400 to ensure its smooth guidance.

[0040] Detonation protection mechanism 120:

[0041] The assembly includes a fixed cylinder 121, a plunger rod 122, a short-circuit control electrode 123, and an initiating explosive 124. The initiating explosive 124 is preferably a sodium azide pellet structure and is fixed to the end of the inner cavity of the fixed cylinder 121. The plunger rod 122 can slide axially inside the fixed cylinder 121, with one end facing the electromagnetic drive assembly 400, and is used to push the latter and the locking rod 200 forward as a whole in the event of an explosion. The short-circuit control electrode 123 is arranged between the fixed cylinder 121 and the control circuit, and ignites the initiating explosive 124 upon triggering by an abnormal signal such as a short circuit.

[0042] Electromagnetic drive assembly 400:

[0043] The system includes a base 410, an excitation disk 420, and multiple magnetic blocks 430. The excitation disk 420 is positioned at the center of the base 410 and surrounds the magnetic blocks 430, forming a stable magnetic field area. An excitation coil is mounted on the surface of the excitation disk 420, and its input end is connected to an external controller via a wing plate and a conductive slide rail to achieve command-response on / off control. The excitation disk 420 is slidably fitted onto a guide rod 111, which, under electromagnetic drive, moves the entire electromagnetic assembly axially along the guide rod 111.

[0044] Lock bar 200:

[0045] One end is connected to the electromagnetic drive assembly 400 through the first insulating terminal 210 to maintain electrical insulation; the surface of the first insulating terminal 210 is provided with an access electrode 220 for subsequent contact with the grounding electrode 342 to form a closed circuit; the outer wall of the locking rod 200 is provided with threads, which engage with the threaded sleeve ring 330 in the power base 300.

[0046] 300-inch power connector:

[0047] The system includes a shaft bracket 310, a movable guide bracket 320, a threaded sleeve ring 330, and a rotating base 340. One end of the movable guide bracket 320 is connected to a tension spring 321, and the other end passes through the vacuum housing 100 to form a guiding sliding structure, maintaining its reset performance. The threaded sleeve ring 330 has an internal threaded hole that matches the external thread of the locking rod 200. A mating movable gear disc 331 and a fixed gear disc 332 (Note: mistakenly labeled 322 in the claims, now corrected to 332) are provided between the threaded sleeve ring 330 and the rotating base 340, forming a ratchet structure to restrict the free rotation of the threaded sleeve ring. A second insulating terminal 341 is installed on the outside of the rotating base 340, which is electrically connected to a grounding electrode 342. A sliding pin is provided on one side of the rotating base 340 to guide the linear sliding of the threaded sleeve ring 330.

[0048] Grounding interface: The ends of the access electrode 220 and the grounding electrode 342 penetrate through the outer wall of the sealed cover box 110 and the vacuum box 100, respectively, and are used to connect to the external control circuit and the grounding circuit. Example 2:

[0049] This embodiment further optimizes the protection response structure based on Embodiment 1 to adapt to the grounding requirements of different types of power equipment.

[0050] In this high-voltage grounding switch, the vacuum housing 100 and the sealed cover 110 are still made of transparent acrylic material and are encapsulated with epoxy resin to form a highly airtight structure. The guide rod 111 in the sealed cover 110 can adopt a double-rail structure to improve the smooth operation of the locking rod 200 and the electromagnetic drive assembly 400.

[0051] Regarding the structure of the electromagnetic drive assembly 400, a flexible conductive brush connector is provided on the outer ring of the excitation disk 420 to ensure that it maintains an electrical connection with the external controller while rotating, thereby improving drive efficiency.

[0052] In terms of the structure of the power connector 300, a limiting shim is added between the moving guide 320 and the spring 321 to ensure that tensile fatigue is avoided during long-term high-frequency switching operations; an axial anti-slip structure is added between the threaded sleeve 330 and the rotating seat 340 to prevent malfunctions caused by vibration in special environments.

[0053] This embodiment further enhances the stability and response efficiency of the system, and is particularly suitable for scenarios with higher requirements for switching action accuracy and response time, such as precision power distribution rooms and power conversion stations.

[0054] As can be seen from the description of the two embodiments above, the indoor high-voltage grounding switch proposed in this invention has the advantages of novel structure, rapid response, and dual triggering mechanism of electric and explosive, which can effectively improve the grounding safety of high-voltage system under abnormal conditions and has good prospects for promotion and application.

[0055] Working principle and usage process of this invention:

[0056] Normal operating state: Under the control of the engagement circuit, the electromagnetic drive assembly 400 receives a command signal, energizing the excitation disk 420 and generating a magnetic field. The excitation disk 420 drives the disk base 410 and the locking rod 200 to rotate, thereby guiding the locking rod 200 and the electromagnetic drive assembly 400 to slide synchronously along the surface of the guide rod 111 through the threaded interaction between the locking rod 200 and the rotating base 340. During the sliding process, the locking rod 200 gradually approaches the grounding base 300, and its end contacts the grounding electrode 342 on the inner side of the rotating base 340, forming an electrode connection. When the end of the locking rod 200 contacts the grounding electrode 342, the access electrode 220 is electrically connected to the grounding electrode 342, and the current is successfully introduced into the grounding circuit, completing the high-voltage grounding.

[0057] Circuit disconnection state: When the control system issues a disconnection command, the electromagnetic drive assembly 400 reverses the driving force of the locking rod 200, causing it to separate from the rotating seat 340 and the threaded sleeve 330. During this process, the magnetic block 430 and the disk seat 410 rotate synchronously in the opposite direction with the locking rod 200, and the locking rod 200 and the electromagnetic drive assembly 400 slide synchronously in the opposite direction along the surface of the guide rod 111, disengaging from the grounding electrode 342, causing the end of the locking rod 200 to disconnect from the grounding electrode 342. At this time, the current connection between the access electrode 220 and the grounding electrode 342 is broken, completing the disconnection operation of the high-voltage grounding switch.

[0058] Abnormal conditions such as short circuits and high temperatures: In the event of an abnormal condition such as a short circuit or high temperature, the control system sends a signal to trigger the short circuit control electrode 123 to ignite the detonating charge 124. The detonating charge 124 has a nano-azide particle structure. When the signal is triggered, the detonating charge rapidly generates a large amount of gas, pushing the plunger rod 122 to move. The plunger rod 122 pushes the locking rod 200 to move linearly, causing it to interact with the threaded sleeve 330, resulting in the free rotation of the threaded sleeve 330. Through the action of the threads, the locking rod 200 gradually enters the inner side of the threaded sleeve 330 and the rotating seat 340. The linear movement of the locking rod 200 contacts the end of the grounding electrode 342, completing the grounding connection and ensuring the safety of equipment grounding.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor high-voltage grounding switch, characterized in that, include: Vacuum housing (100), locking rod (200), electrical connector (300), and electromagnetic drive assembly (400). A sealing cover (110) is fixedly connected to one side of the vacuum box (100). The inner side of the sealing cover (110) is provided with a guide rod (111) for guiding the sliding of the electromagnetic drive assembly (400). A detonation protection mechanism (120) is fixedly installed on the inner side of the sealing cover (110). The detonation protection mechanism (120) is used to push the electromagnetic drive assembly (400) to move linearly along the surface of the guide rod (111) when the contact control circuit is working. One end of the locking rod (200) is provided with a first insulating terminal (210) fixed to the surface of the electromagnetic drive assembly (400), and the surface of the first insulating terminal (210) is provided with an access electrode (220) electrically connected to the locking rod (200). The electromagnetic drive assembly (400) includes a disk base (410), an excitation disk (420), and a plurality of magnetic blocks (430) fixed inside the disk base (410). The excitation disk (420) is arranged on both sides of the magnetic blocks (430), and the surface of the excitation disk (420) is provided with excitation coils facing the surface of the magnetic blocks (430). The power base (300) includes a shaft frame (310), a moving guide frame (320), a threaded sleeve ring (330), and a rotating base (340). One side of the moving guide frame (320) is provided with a sliding rod that passes through the surface of the vacuum box (100) to guide the sliding of the moving guide frame (320). One side of the moving guide frame (320) is provided with a spring (321) connected to the inner wall of the vacuum box (100). The threaded sleeve ring (330) is slidably installed on one side of the rotating base (340), and the other side of the rotating base (340) is provided with a second insulating terminal (341) and a grounding electrode (342). The opposing surfaces of the threaded sleeve ring (330) and the moving guide frame (320) are provided with a moving gear plate (331) and a fixed gear plate (332) that abut against each other. The threaded hole inside the threaded sleeve ring (330) is adapted to the thread on the surface of the locking rod (200).

2. The indoor high-voltage grounding switch according to claim 1, characterized in that, The detonation protection mechanism (120) includes a fixed cylinder (121), a plunger rod (122), and a short-circuit control electrode (123) fixed to the surface of the fixed cylinder (121). The end of the short-circuit control electrode (123) is connected to the detonating charge (124) located inside the fixed cylinder (121). One end of the plunger rod (122) is slidably sleeved inside the fixed cylinder (121). The fixed cylinder (121) is fixed inside the sealing cover box (110). One end of the plunger rod (122) is arranged opposite to the electromagnetic drive assembly (400).

3. The indoor high-voltage grounding switch according to claim 2, characterized in that, The end of the short-circuit control electrode (123) is used to connect to the control circuit. When triggered by the short-circuit command signal, the detonator (124) is ignited. The detonator (124) is a nano-azide particle structure. When triggered by the short-circuit command signal, a large amount of gas is generated to drive the plunger rod (122), the electromagnetic drive assembly (400) and the locking rod (200) to move linearly.

4. The indoor high-voltage grounding switch according to claim 1, characterized in that, The excitation disk (420) has a wing plate that is slidably sleeved on the surface of the guide rod (111), and the input end of the excitation disk (420) is electrically connected to a controller for passing AC current through the excitation coil according to the instruction.

5. The indoor high-voltage grounding switch according to claim 1, characterized in that, The spring (321) is a tension spring structure, with its two ends connected to the inner wall of the vacuum box (100) and the moving guide (320) respectively and in a tensioned state. The moving toothed disc (331) and the fixed toothed disc (332) are ratchet structures used to suppress the free rotation of the threaded sleeve (330).

6. The indoor high-voltage grounding switch according to claim 1, characterized in that, One side of the rotary seat (340) is provided with a sliding pin to guide the threaded sleeve (330) to slide linearly toward the surface of the rotary seat (340).

7. The indoor high-voltage grounding switch according to claim 1, characterized in that, The ends of the access electrode (220) and the ground electrode (342) respectively penetrate through the sealed cover box (110) and the vacuum box (100) for connecting the circuit and the grounding circuit.

8. The indoor high-voltage grounding switch according to claim 1, characterized in that, The vacuum box (100) and the sealing cover (110) are made of transparent acrylic material, and the inside of the vacuum box (100) and the sealing cover (110) is a vacuum environment.

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