High stability high-low voltage complete switch device

Abstract

The application discloses a high-stability high-low voltage complete switch device, relates to the technical field of high-low voltage complete switch devices, and comprises a transformer body, wherein the top surface of the transformer body is provided with a bottom plate. Three first insulator strings and a rectangular connecting plate are arranged on the top surface of the front side of the bottom plate, and a U-shaped high-voltage wire clamp is installed at the front end of the rectangular connecting plate. Three second insulator strings and an L-shaped connecting plate are arranged on the top surface of the rear side of the bottom plate. A pair of conductive swing arms are hingedly arranged between the L-shaped connecting plate and the rectangular connecting plate, and a third insulator string is hingedly arranged at the middle of each pair of conductive swing arms. An L-shaped contact plate is arranged on the back surface of the L-shaped connecting plate, a U-shaped low-voltage wire clamp is assembled at the rear end of the L-shaped contact plate, and the bottom plate is connected with each L-shaped contact plate through a swing arm mechanism. The application integrates the conductive, insulating and transmission structures, is firm in wiring, strong in anti-disturbance capacity, accurate in action response, high in conductive efficiency, good in protection performance, suitable for severe working conditions, low in failure rate, excellent in overall stability, and capable of meeting the long-term reliable use requirement of high-low voltage switching.

Description

Technical Field

[0001] This invention relates to the field of high and low voltage switchgear technology, and in particular to a high and low voltage switchgear device with high stability. Background Technology

[0002] Existing high and low voltage switchgear mostly adopts a split conductive structure, conventional insulator support, and simple transmission components. It relies on single-contact conductivity to achieve circuit switching. The insulation design focuses on single-circuit isolation, and the transmission mechanism is mainly based on conventional linkages or manual drive. The whole system is built around the basic switching function, which is a common technical solution adopted in the industry.

[0003] Traditional devices have incomplete insulation separation, which can easily lead to crosstalk between high and low voltages and potential leakage. The small conductive contact area and high contact resistance can cause overheating and arcing when closing the circuit. Poor transmission synchronization can easily lead to loose connections and incomplete disconnection due to asynchronous switching of the three phases. The wiring and support structure are unstable, with weak anti-disturbance capabilities and poor long-term operational stability, making it difficult to meet the stringent requirements of high-voltage operating conditions. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a highly stable high and low voltage switchgear.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0006] A high-stability high and low voltage switchgear includes a transformer body. A base plate is fixedly installed on the top surface of the transformer body. Three equidistant first insulator strings are fixedly installed on the front side of the top surface of the base plate. A rectangular connecting plate is fixedly installed at the top of each first insulator string. A U-shaped high-voltage clamp is installed at the front end of each rectangular connecting plate.

[0007] Three equidistant second insulator strings are fixedly installed on the rear side of the top surface of the base plate. An L-shaped connecting plate is fixedly installed at the top of each second insulator string. A pair of conductive swing arms are hinged between each L-shaped connecting plate and the corresponding rectangular connecting plate. A third insulator string is hinged in the middle of each pair of conductive swing arms.

[0008] Each L-shaped connecting plate has an L-shaped contact plate on its back side, and each L-shaped contact plate has a U-shaped low-voltage clamp installed at its rear end. The base plate is connected to the three L-shaped contact plates through a swing arm mechanism.

[0009] Preferably, a first T-shaped flange is fixedly provided at the bottom end of each first insulator string, and each first T-shaped flange is locked to the base plate by flange bolts. A second T-shaped flange is fixedly provided at the bottom end of each second insulator string, and each second T-shaped flange is locked to the base plate by flange bolts.

[0010] Preferably, each of the U-shaped high-voltage clamps has a high-voltage connecting plate fixedly installed at its bottom end, and each high-voltage connecting plate is locked to the corresponding rectangular connecting plate by bolts. Each of the U-shaped low-voltage clamps has a low-voltage connecting plate fixedly installed at its bottom end, and each low-voltage connecting plate is locked to the corresponding L-shaped contact plate by bolts.

[0011] Preferably, a high-voltage conductive block is fixedly provided on the top surface of each rectangular connecting plate, a hinge lug is fixedly provided on the top surface of each L-shaped connecting plate, the rear end of each pair of conductive swing arms is hinged to the corresponding hinge lug, a high-voltage clamp is fixedly provided on the front end of each pair of conductive swing arms, and each pair of high-voltage clamps abuts against both sides of the corresponding high-voltage conductive block.

[0012] Preferably, a single ear seat is fixedly provided at the top of each third insulator string, and the top of each single ear seat is hinged to the middle of a corresponding pair of conductive swing arms. A double ear seat is fixedly provided at the bottom of each third insulator string.

[0013] Preferably, a pair of L-shaped bases are fixedly installed on the top surface of the base plate, and a fixed connecting shaft is rotatably inserted between the pair of L-shaped bases. Three fixed swing arms are fixedly installed on the fixed connecting shaft at equal intervals, and the outer end of each fixed swing arm is hinged to the corresponding double ear seat.

[0014] Preferably, a first L-shaped bracket is fixedly installed on the top surface of the base plate, a first motor is fixedly installed on the top of the first L-shaped bracket, a first connecting rod is fixedly installed at the end of the motor shaft of the first motor, a second connecting rod is fixedly installed on the fixed connecting shaft, and a fixed long rod is hinged between the outer end of the first connecting rod and the outer end of the second connecting rod.

[0015] Preferably, an electrical contact fixing plate is fixedly provided on the top back of each L-shaped connecting plate, and an electrical contact connecting plate is fixedly provided on the top front of each L-shaped contact plate, and each electrical contact connecting plate is in contact with the corresponding electrical contact fixing plate.

[0016] Preferably, the swing arm mechanism includes a driven coupling and an insulated swing arm. A pair of rectangular bases are fixedly provided on the top surface of the base plate. A pair of parallel driven couplings are rotatably inserted between the pair of rectangular bases. A sprocket is fixedly sleeved at the front end of each driven coupling. The pair of sprockets are connected by a driven chain drive.

[0017] Each L-shaped contact plate has a U-shaped channel steel fixedly installed on its bottom surface. A pair of parallel insulating swing arms are hinged in the opening of each U-shaped channel steel. The bottom end of each insulating swing arm is fixedly connected to the corresponding driven coupling.

[0018] Preferably, a second L-shaped bracket is fixedly installed on the top surface of the base plate, a second motor is fixedly installed on the top of the second L-shaped bracket, a third connecting rod is fixedly installed at the end of the motor shaft of the second motor, a fourth connecting rod is fixedly installed on one of the driven connecting shafts, and a fixed driven long rod is hinged between the outer end of the third connecting rod and the outer end of the fourth connecting rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, insulation protection is in place to prevent leakage and crosstalk. The device is equipped with multiple sets of insulator strings and insulated swing arms to achieve triple insulation separation of high voltage circuit, low voltage circuit and transmission mechanism. The flange locking insulator support is stable, which not only isolates high and low voltage current crosstalk, but also prevents current leakage, eliminates the safety hazards of leakage and arcing from the source, and greatly improves the insulation level of the device operation.

[0021] 2. In this invention, the transmission is precise and synchronized, and the switching is smooth and reliable. Both the high and low voltage sides adopt a motor linkage + swing arm linkage structure. The high voltage side is double-sided clamped for conductivity, and the low voltage side is planarly attached for conductivity. The contact area is large and the resistance is small. The three-phase switching action is synchronized without delay. The closing is tight and the disconnection is complete and in place, avoiding problems such as loose connection, offset, and heat loss, and ensuring the continuity of conductivity.

[0022] In summary, this invention boasts excellent overall stability, adapts to stringent operating conditions, integrates and optimizes the three core structures of conductivity, insulation, and transmission, features secure wiring to resist disturbances, provides precise and rapid response, balances conductivity efficiency with safety protection, perfectly meets the requirements for high and low voltage switching, and operates without loosening or failure over long periods, truly fulfilling the design intent of high stability. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the base plate and three sets of insulator strings of the present invention;

[0026] Figure 3 For the present invention Figure 2Another perspective illustration;

[0027] Figure 4 For the present invention Figure 2 Explosion-proof diagram of the structure;

[0028] Figure 5 This is a schematic diagram of the structure of a set of insulator strings according to the present invention;

[0029] Figure 6 For the present invention Figure 5 Explosion-proof diagram of the structure;

[0030] In the diagram, the numbers represent: 100, Transformer body; 101, Base plate; 102, First T-flange; 103, First insulator string; 104, Rectangular connecting plate; 105, High-voltage conductive block; 106, High-voltage connecting plate; 107, U-shaped high-voltage clamp; 200, Second T-flange; 201, Second insulator string; 202, L-shaped connecting plate; 203, Hinge lug; 204, Electrical contact fixing plate; 205, Conductive swing arm; 206, High-voltage clamp; 207, Single lug; 208, Third insulator string; 209, Double lug; 30 0. Rectangular base; 301. Driven coupling; 302. Driven chain; 303. Insulated swing arm; 304. U-shaped channel steel; 305. L-shaped contact plate; 306. Electrical contact connection plate; 307. Low-voltage connecting plate; 308. U-shaped low-voltage clamp; 309. Second motor; 310. Third connecting rod; 311. Driven long rod; 312. Fourth connecting rod; 400. L-shaped base; 401. Fixed coupling; 402. Fixed swing arm; 403. First motor; 404. First connecting rod; 405. Second connecting rod; 406. Fixed long rod. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example: This example provides a highly stable high and low voltage switchgear. See [link / reference]. Figures 1 to 6 Specifically, it includes a transformer body 100, a base plate 101 fixedly installed on the top surface of the transformer body 100, three equidistant first insulator strings 103 fixedly installed on the front side of the top surface of the base plate 101, a rectangular connecting plate 104 fixedly installed at the top of each first insulator string 103, and a U-shaped high-voltage clamp 107 installed at the front end of each rectangular connecting plate 104.

[0033] Three equidistant second insulator strings 201 are fixedly installed on the rear side of the top surface of the base plate 101. Each second insulator string 201 has an L-shaped connecting plate 202 fixedly installed at its top. Each L-shaped connecting plate 202 is hinged to a pair of conductive swing arms 205 between it and the corresponding rectangular connecting plate 104. Each pair of conductive swing arms 205 has a third insulator string 208 hinged to its middle. The conductive swing arms 205 are hinged between the rectangular connecting plate 104 and the L-shaped connecting plate 202. As a high-voltage circuit conductive transfer component, they work together with the swing to achieve the switching of the high-voltage circuit. The conductive material ensures smooth current conduction, and the hinged structure takes into account both swing flexibility and conductive stability.

[0034] Each L-shaped connecting plate 202 has an L-shaped contact plate 305 on its back, and each L-shaped contact plate 305 has a U-shaped low-voltage clamp 308 installed at its rear end. The base plate 101 is connected to the three L-shaped contact plates 305 through a swing arm mechanism.

[0035] In the specific implementation process, such as Figure 5 and Figure 6 As shown, a high-voltage conductive block 105 is fixedly installed on the top surface of each rectangular connecting plate 104, and a hinge lug 203 is fixedly installed on the top surface of each L-shaped connecting plate 202. The rear end of each pair of conductive swing arms 205 is hinged to the corresponding hinge lug 203, and a high-voltage clamping plate 206 is fixedly installed at the front end of each pair of conductive swing arms 205. Each pair of high-voltage clamping plates 206 abuts against both sides of the corresponding high-voltage conductive block 105. The high-voltage clamping plates 206 swing with the conductive swing arms 205 to clamp both sides of the high-voltage conductive block 105, forming a double-sided contact, increasing the conductive contact area, reducing the contact resistance, avoiding heat loss when the high voltage is turned on, and ensuring the continuity of the high-voltage circuit.

[0036] Each third insulator string 208 has a single ear seat 207 fixedly installed at its top end. The top end of each single ear seat 207 is hinged to the middle of the corresponding pair of conductive swing arms 205. Each third insulator string 208 has a double ear seat 209 fixedly installed at its bottom end. The top end of the third insulator string 208 is hinged to the conductive swing arm 205 through the single ear seat 207, and the bottom end is connected to the transmission mechanism through the double ear seat 209. This achieves both insulation separation between the conductive swing arm 205 and the transmission mechanism to prevent high voltage current from entering the transmission components, and also enables the precise swing of the conductive swing arm 205 in conjunction with the transmission, thus balancing insulation performance and transmission flexibility.

[0037] A pair of L-shaped bases 400 are fixedly installed on the top surface of the base plate 101. A fixed connecting shaft 401 is rotatably inserted between the pair of L-shaped bases 400. Three fixed swing arms 402 are fixedly installed on the fixed connecting shaft 401 at equal intervals. The outer end of each fixed swing arm 402 is hinged and installed in the corresponding double ear seat 209.

[0038] A first L-shaped bracket is fixedly installed on the top surface of the base plate 101. A first motor 403 is fixedly installed on the top of the first L-shaped bracket. A first connecting rod 404 is fixedly installed at the end of the motor shaft of the first motor 403. A second connecting rod 405 is fixedly installed on the fixed connecting shaft 401. A fixed long rod 406 is hinged between the outer end of the first connecting rod 404 and the outer end of the second connecting rod 405.

[0039] The first motor 403, the first connecting rod 404, the second connecting rod 405, the fixed long rod 406, the fixed connecting shaft 401, and the fixed swing arm 402 constitute the high-voltage side precision transmission mechanism. The first motor 403 provides driving force, which drives the fixed connecting shaft 401 and the fixed swing arm 402 to rotate in a directional manner through the linkage of the connecting rod and the long rod, so as to realize the synchronous swing of the conductive swing arm 205, ensuring that the three pairs of high-voltage clamps 206 move in unison, the high-voltage circuit is opened and closed synchronously without delay, and the closing contact is precise and the disconnection is complete.

[0040] In the specific implementation process, such as Figure 5 and Figure 6 As shown, each L-shaped connecting plate 202 has an electrical contact fixing plate 204 fixedly installed on the top back side, and each L-shaped contact plate 305 has an electrical contact connecting plate 306 fixedly installed on the top front side. Each electrical contact connecting plate 306 is in contact with the corresponding electrical contact fixing plate 204. The electrical contact connecting plate 306 and the electrical contact fixing plate 204 are in contact to realize the low-voltage circuit conduction. The planar contact method ensures reliable contact and smooth conductivity. The L-shaped contact plate 305, together with the swing arm mechanism, realizes precise displacement to ensure that the low-voltage circuit switching action is in place and there are no problems of loose connection or missing connection.

[0041] The swing arm mechanism includes a driven coupling 301 and an insulated swing arm 303. A pair of rectangular bases 300 are fixedly installed on the top surface of the base plate 101. A pair of parallel driven couplings 301 are rotatably inserted between the pair of rectangular bases 300. A sprocket is fixedly sleeved at the front end of each driven coupling 301. The pair of sprockets are connected by a driven chain belt 302.

[0042] Each L-shaped contact plate 305 has a U-shaped channel steel 304 fixedly installed on its bottom surface. A pair of parallel insulating swing arms 303 are hinged in the opening of each U-shaped channel steel 304. The bottom end of each insulating swing arm 303 is fixedly connected to the corresponding driven coupling 301. As the core component of the low-voltage circuit swing arm mechanism, the insulating swing arm 303 is designed with pure insulating material to isolate the low-voltage current from the transmission base and motor assembly, eliminating the risk of leakage on the low-voltage side. At the same time, it works with the driven coupling 301 to realize parallelogram swing, ensuring the smooth displacement of the L-shaped contact plate 305 and avoiding poor contact caused by contact offset.

[0043] A second L-shaped bracket is fixedly installed on the top surface of the base plate 101. A second motor 309 is fixedly installed on the top of the second L-shaped bracket. A third connecting rod 310 is fixedly installed at the end of the motor shaft of the second motor 309. A fourth connecting rod 312 is fixedly installed on one of the driven connecting shafts 301. A fixed driven long rod 311 is hinged between the outer end of the third connecting rod 310 and the outer end of the fourth connecting rod 312.

[0044] The second motor 309, the third connecting rod 310, the fourth connecting rod 312, the fixed driven long rod 311, the driven shaft 301, the sprocket, and the driven chain belt 302 form a low-voltage side linkage transmission mechanism. The second motor 309 drives the connecting rod transmission, and the sprocket and the driven chain belt 302 realize the two driven shafts 301 to rotate in opposite directions synchronously, driving the insulating swing arm 303 to swing synchronously, ensuring that the three L-shaped contact plates 305 are displaced synchronously, and the low-voltage circuit closes tightly and the disconnection distance is uniform.

[0045] It should be noted that: such as Figure 5 and Figure 6 As shown, each first insulator string 103 is fixedly provided with a first T-shaped flange 102 at its bottom end. Each first T-shaped flange 102 is locked to the base plate 101 by flange bolts. The first insulator string 103, together with the first T-shaped flange 102, is locked to the base plate 101 to provide vertical insulation support for the high-voltage side terminal, isolate the high-voltage current from being conducted to the base plate 101 and the transformer body 100, avoid the safety accident caused by high-voltage side leakage, and at the same time ensure the structural stability of the high-voltage terminal and resist external disturbances.

[0046] Each second insulator string 201 is fixedly provided with a second T-type flange 200 at its bottom end. Each second T-type flange 200 is locked to the base plate 101 by flange bolts. The second insulator string 201 is locked to the base plate 101 by relying on the second T-type flange 200 to achieve physical insulation isolation between high and low voltage circuits, prevent crosstalk between high and low voltage currents, and improve the overall insulation level of the device.

[0047] Each U-shaped high-voltage clamp 107 has a high-voltage connecting plate 106 fixedly installed at its bottom end. Each high-voltage connecting plate 106 is locked to the corresponding rectangular connecting plate 104 by bolts. The U-shaped high-voltage clamp 107, together with the high-voltage connecting plate 106 and the rectangular connecting plate 104, is locked and fixed to achieve a tight clamping of the high-voltage cable. The wiring contact surface fits tightly, reducing the risk of loose high-voltage wiring and arcing, and ensuring a stable conductive connection between the high-voltage cable and the device.

[0048] Each U-shaped low-voltage clamp 308 has a low-voltage connecting plate 307 fixedly installed at its bottom. Each low-voltage connecting plate 307 is locked to the corresponding L-shaped contact plate 305 by bolts. The U-shaped low-voltage clamp 308, together with the low-voltage connecting plate 307 and the L-shaped contact plate 305, are locked together to securely clamp the low-voltage cable, ensuring that the low-voltage wiring is stable and does not loosen, and realizing a reliable conductive connection between the low-voltage cable and the low-voltage circuit of the device.

[0049] The working principle of this embodiment is as follows: In the initial standby state, the pre-installation and fixing of high and low voltage cables are completed: the three high voltage cables are sequentially and securely installed inside the three U-shaped high voltage clamps 107, and the high voltage connection is secured by the locking structure of the high voltage connecting plate 106 and the rectangular connecting plate 104.

[0050] Simultaneously, the three low-voltage cables are sequentially and securely installed inside the three U-shaped low-voltage clamps 308. The low-voltage wiring is securely achieved by relying on the locking structure of the low-voltage connecting plate 307 and the L-shaped contact plate 305. At this time, both the high-voltage and low-voltage conductive circuits are in the disconnected state, and the device has stable standby conditions.

[0051] Low-voltage circuit closing and conduction: Start the second motor 309. Under the action of the motor driving force, its motor shaft drives the third link 310 to rotate synchronously in a circular motion. The third link 310 drives the fourth link 312 and the corresponding driven shaft 301 to achieve directional rotation through the hinged fixed driven long rod 311.

[0052] Since the two driven shafts 301 form a linkage transmission with the driven chain belt 302 through the front sprocket, the two driven shafts 301 rotate synchronously in opposite directions, thereby driving the insulating swing arm 303 fixed on the driven shafts 301 to swing synchronously.

[0053] The insulating swing arm 303, U-shaped channel steel 304, and L-shaped contact plate 305 form a parallelogram swing arm mechanism. Driven by the swing arm, the L-shaped contact plate 305 is pushed smoothly towards the L-shaped connecting plate 202 until the electrical contact connecting plate 306 and the electrical contact fixing plate 204 are in close contact, thus completing the conduction connection of the low-voltage circuit. The fully insulating swing arm 303 ensures the insulation stability of the low-voltage side and avoids the risk of leakage.

[0054] High-voltage circuit closing and conduction: After the low-voltage circuit is conducted, the first motor 403 is started, and the motor shaft drives the first connecting rod 404 to rotate synchronously in a circular motion; the first connecting rod 404 is driven by the hinged fixed long rod 406 to drive the second connecting rod 405 and the fixed connecting shaft 401 to achieve directional rotation, and the three fixed swing arms 402 fixed on the fixed connecting shaft 401 swing downward synchronously.

[0055] The outer end of the fixed swing arm 402 pulls the third insulator string 208 downward through the double ear seat 209. The top of the third insulator string 208 is hinged to the middle of the conductive swing arm 205 through the single ear seat 207, thereby driving the three pairs of conductive swing arms 205 to swing downward with the hinge ear seat 203 on the L-shaped connecting plate 202 as the fulcrum. Finally, each pair of high voltage clamping plates 206 is stably clamped on both sides of the corresponding high voltage conductive block 105, forming a stable conductive contact of the high voltage circuit. Relying on the multiple insulation support of the first insulator string 103, the second insulator string 201, and the third insulator string 208, the stability of the high voltage side operation is guaranteed.

[0056] When it is necessary to disconnect the high and low voltage circuits, the first motor 403 and the second motor 309 are synchronously controlled to run in reverse, driving each linkage and swing arm mechanism to move in reverse. The first motor 403 rotates in reverse, causing the conductive swing arm 205 to reset upward, the high voltage clamp 206 to separate from the high voltage conductive block 105, and the high voltage circuit is disconnected first. The second motor 309 rotates in reverse, causing the insulating swing arm 303 to reset, the L-shaped contact plate 305 to move away from the L-shaped connecting plate 202, the electrical contact connecting plate 306 to separate from the electrical contact fixing plate 204, and the low voltage circuit is disconnected accordingly.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-stability high- and low-voltage switchgear assembly, comprising a transformer body (100), characterized in that: A base plate (101) is fixedly installed on the top surface of the transformer body (100). Three first insulator strings (103) are fixedly installed on the front side of the top surface of the base plate (101). A rectangular connecting plate (104) is fixedly installed at the top of the first insulator strings (103). A U-shaped high-voltage clamp (107) is installed at the front end of the rectangular connecting plate (104). Three second insulator strings (201) are fixedly installed on the rear side of the top surface of the base plate (101). An L-shaped connecting plate (202) is fixedly installed at the top of the second insulator string (201). A pair of conductive swing arms (205) are hinged between the L-shaped connecting plate (202) and the corresponding rectangular connecting plate (104). A third insulator string (208) is hinged in the middle of each pair of conductive swing arms (205). An L-shaped contact plate (305) is provided on the back of the L-shaped connecting plate (202), and a U-shaped low-voltage clamp (308) is installed at the rear end of the L-shaped contact plate (305). The base plate (101) is connected to the three L-shaped contact plates (305) through a swing arm mechanism. An electrical contact fixing plate (204) is fixedly provided on the top back of the L-shaped connecting plate (202), and an electrical contact connecting plate (306) is fixedly provided on the top front of the L-shaped contact plate (305). The electrical contact connecting plate (306) is in contact with the corresponding electrical contact fixing plate (204). The swing arm mechanism includes a driven coupling (301) and an insulated swing arm (303). A pair of rectangular bases (300) are fixedly provided on the top surface of the base plate (101). A pair of driven couplings (301) are rotatably inserted between the pair of rectangular bases (300). A sprocket is fixedly sleeved on the front end of the driven coupling (301). The pair of sprockets are connected by a driven chain belt (302). The bottom surface of the L-shaped contact plate (305) is fixedly provided with a U-shaped channel steel (304), and a pair of insulating swing arms (303) are hinged in the opening of the U-shaped channel steel (304). The bottom end of the insulating swing arm (303) is fixedly connected to the corresponding driven coupling (301).

2. The high-stability high and low voltage switchgear according to claim 1, characterized in that: The bottom end of the first insulator string (103) is fixedly provided with a first T-type flange (102), which is locked to the base plate (101) by flange bolts. The bottom end of the second insulator string (201) is fixedly provided with a second T-type flange (200), which is locked to the base plate (101) by flange bolts.

3. The high-stability high and low voltage switchgear according to claim 1, characterized in that: The bottom end of the U-shaped high-voltage clamp (107) is fixedly provided with a high-voltage connecting plate (106), which is locked to the corresponding rectangular connecting plate (104) by bolts. The bottom end of the U-shaped low-voltage clamp (308) is fixedly provided with a low-voltage connecting plate (307), which is locked to the corresponding L-shaped contact plate (305) by bolts.

4. The high-stability high and low voltage switchgear according to claim 1, characterized in that: A high-voltage conductive block (105) is fixedly provided on the top surface of the rectangular connecting plate (104), and a hinge ear (203) is fixedly provided on the top surface of the L-shaped connecting plate (202). The rear end of each pair of conductive swing arms (205) is hinged to the corresponding hinge ear (203), and a high-voltage clamp (206) is fixedly provided at the front end of each pair of conductive swing arms (205). Each pair of high-voltage clamps (206) abuts against both sides of the corresponding high-voltage conductive block (105).

5. A high-stability high- and low-voltage switchgear according to claim 1, characterized in that: The top end of the third insulator string (208) is fixedly provided with a single ear seat (207), the top end of the single ear seat (207) is hinged to the middle of the corresponding pair of conductive swing arms (205), and the bottom end of the third insulator string (208) is fixedly provided with a double ear seat (209).

6. A high-stability high- and low-voltage switchgear according to claim 5, characterized in that: A pair of L-shaped bases (400) are fixedly installed on the top surface of the base plate (101). A fixed connecting shaft (401) is rotatably inserted between the pair of L-shaped bases (400). Three fixed swing arms (402) are fixedly installed on the fixed connecting shaft (401). The outer ends of the fixed swing arms (402) are hinged and installed in the corresponding double ear seat (209).

7. A high-stability high- and low-voltage switchgear according to claim 6, characterized in that: A first L-shaped bracket is fixedly installed on the top surface of the base plate (101). A first motor (403) is fixedly installed on the top of the first L-shaped bracket. A first connecting rod (404) is fixedly installed at the end of the motor shaft of the first motor (403). A second connecting rod (405) is fixedly installed on the fixed connecting shaft (401). A fixed long rod (406) is hinged between the outer end of the first connecting rod (404) and the outer end of the second connecting rod (405).

8. A high-stability high- and low-voltage switchgear according to claim 1, characterized in that: A second L-shaped bracket is fixedly installed on the top surface of the base plate (101). A second motor (309) is fixedly installed on the top of the second L-shaped bracket. A third connecting rod (310) is fixedly installed at the end of the motor shaft of the second motor (309). A fourth connecting rod (312) is fixedly installed on one of the driven connecting shafts (301). A fixed driven long rod (311) is hinged between the outer end of the third connecting rod (310) and the outer end of the fourth connecting rod (312).

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