Voltage transformer with break

Abstract

The present application belongs to the technical field of voltage transformers. Disclosed is a voltage transformer with a break, comprising a voltage transformer body, an inner conductor and an on-off mechanism, wherein the voltage transformer body has a housing, and a sealing cover made of rubber is fixed in a through hole; the inner conductor comprises a first conductor, an intermediate conductor and a second conductor, the first conductor and the second conductor being collinear, the intermediate conductor being vertically arranged, first inclined surfaces being provided at two ends of the intermediate conductor, and second inclined surfaces being respectively provided at the lower end of the first conductor and the upper end of the second conductor; the on-off mechanism is used for driving the intermediate conductor to move horizontally, such that the first inclined surfaces are engaged with or disengaged from the second inclined surfaces; the on-off mechanism comprises a unidirectional advance assembly, a unidirectional retraction assembly and a switching assembly; the intermediate conductor is connected with a driving tube; the sealing cover is connected with a transmission sleeve; and the switching assembly is used for switching respective engagement states of the unidirectional advance assembly and the unidirectional retraction assembly with the driving tube. The present application can satisfy the operation of the on-off mechanism while ensuring the sealing performance of the housing.

Description

A voltage transformer with a break Technical Field

[0001] This application belongs to the field of voltage transformer technology and relates to a voltage transformer with a break. Background Technology

[0002] Before a GIS can be put into operation on-site, various components need to be tested and verified on-site. Power can only be supplied and put into operation after the verification is qualified.

[0003] Voltage transformers cannot withstand high test voltages, so the connecting conductor between the voltage transformer and the GIS needs to be manually disconnected to create a break between the GIS and the voltage transformer. In this way, the voltage transformer will not be affected when the GIS is subjected to a high voltage withstand test, but this operation is quite cumbersome.

[0004] Therefore, Chinese Patent Application No. CN202322709717.0 discloses a voltage transformer with a break, which includes an inner conductor and a switching component. The inner conductor includes a middle conductor and two side conductors disposed on both sides of the middle conductor. The two side conductors are coaxial and fixedly disposed inside the voltage transformer. The middle conductor is hinged inside the voltage transformer. The switching component is used to make the middle conductor, the two side conductors conductively connected or to form a break between the two side conductors that meets the insulation test margin. After the break is formed, the GIS can be individually tested for withstand voltage, avoiding the trouble of repeatedly disassembling and assembling the voltage transformer.

[0005] However, the installation of the switching component inevitably requires opening a through hole in the voltage transformer housing to allow external power to be applied to move the switching component. Although a sealing ring can be added at the mating position between the through hole and the switching component to ensure the sealing of the housing, the switching component is a moving structure and the sealing ring is a dynamic seal with limited sealing effect. After long-term use, it is easy to cause the seal to fail. Summary of the Invention

[0006] To achieve both switching operation and sealing, a voltage transformer with a break point is provided.

[0007] This application provides a voltage transformer with a break point, specifically implemented using the following technical solution:

[0008] A voltage transformer with a break includes a voltage transformer body, an inner conductor, and a switching mechanism. The voltage transformer body has a shell with a through hole, and a rubber sealing cap is fixed inside the through hole. The inner conductor includes a first conductor, an intermediate conductor, and a second conductor, both of which are fixedly disposed within the voltage transformer body and are aligned in a straight line. The intermediate conductor is vertically oriented, with first inclined surfaces at both ends and second inclined surfaces at the lower end of the first conductor and the upper end of the second conductor. The switching mechanism is used to drive the intermediate conductor to move horizontally, causing the first inclined surfaces to engage with or disengage from the second inclined surfaces. The switching mechanism includes a single... The system includes a forward assembly, a one-way retraction assembly, and a switching assembly. The intermediate conductor is connected to a drive tube, and the sealing cap is connected to a transmission sleeve. The switching assembly is used to switch the engagement states of the one-way forward assembly and the one-way retraction assembly with the drive tube. When the one-way forward assembly engages with the drive tube, the intermittent pressing pressure of the sealing cap is transmitted to the drive tube through the transmission sleeve and the one-way forward assembly, causing the intermediate conductor to advance step by step to disengage from the first and second conductors. When the one-way retraction assembly engages with the drive tube, the intermittent pressing pressure of the sealing cap is transmitted to the drive tube through the transmission sleeve and the one-way retraction assembly, causing the intermediate conductor to retract step by step to contact the first and second conductors.

[0009] The above technical solution involves setting up a sealing cover, a one-way forward assembly, a one-way backward assembly, and a switching assembly. The switching assembly switches the engagement states of the one-way forward and one-way backward assemblies with the drive tube. When the one-way forward assembly engages with the drive tube, the intermittent pressing force of the sealing cover is transmitted to the drive tube through the transmission sleeve and the one-way forward assembly, causing the intermediate conductor to advance step by step to disengage from the first and second conductors, thereby breaking the circuit between the voltage transformer body and the external high-voltage electricity to facilitate withstand voltage testing. When the one-way backward assembly engages with the drive tube, the intermittent pressing force of the sealing cover is transmitted to the drive tube through the transmission sleeve and the one-way backward assembly, causing the intermediate conductor to retreat step by step to contact the first and second conductors, thereby establishing a circuit between the voltage transformer body and the external high-voltage electricity.

[0010] Furthermore, since the power source comes from repeated pressing of the sealing cap, the deformation of the sealing cap itself is small, which means that the disturbance to the connection between the sealing cap and the housing is small, thus ensuring the sealing performance of the housing.

[0011] Secondly, the distance of pressing the sealing cap multiple times will be superimposed by the one-way forward component and the one-way backward component to lengthen the movement distance of the intermediate conductor, thereby ensuring the stability of the switching.

[0012] Optionally, the sealing cap includes a trigger part, a conical ring part, and a connecting part from the middle to the outer periphery. The connecting part is bonded and fixed to the inner wall of the through hole. The trigger part is bullet-shaped, with its convex surface located outside the through hole and its concave part connected to the transmission sleeve.

[0013] By using the above technical solution, and by setting a bullet-shaped trigger part and a conical ring part, the axial elastic deformation displacement distance of the sealing cover can be greatly increased, and the structural stability of the sealing cover can be ensured without pressing.

[0014] Optionally, a disc is coaxially fixed to the center of the sealing cover, and the outer periphery of the disc is coaxially rotatably connected to the port of the transmission sleeve; a fixed sleeve is fixed to the inner wall of the housing and coaxially arranged with the through hole, and a return spring is fixed between the fixed sleeve and the transmission sleeve. The elastic force of the return spring is used to force the transmission sleeve to move away from the intermediate conductor; one end of the drive tube is rotatably arranged relative to the intermediate conductor, and the surface of the other end of the drive tube is provided with a plurality of axially spaced limiting grooves. The outer peripheral surface of the drive tube is provided with a strip-shaped first empty groove and a strip-shaped second empty groove extending axially. The first empty groove and the second empty groove are respectively located on both sides of the limiting groove and communicate with the limiting groove; the unidirectional forward component includes a first limiting block, a second limiting block, a first spring and a second spring. The first limiting block is radially slidably connected to the transmission sleeve. The first spring is used to drive the first limiting block to slide along the direction close to the axis of the transmission sleeve. One end of the first limiting block is provided with a first guide surface, and the second limiting block... The first spring is radially slidably connected to the fixed sleeve, and the second spring is used to drive the second limiting block to slide along the direction close to the axis of the fixed sleeve. One end of the second limiting block is provided with a second guide surface. Both the first guide surface and the second guide surface are disposed away from the intermediate conductor. The one-way retraction assembly includes a third limiting block, a fourth limiting block, a third spring, and a fourth spring. The third limiting block is radially slidably connected to the transmission sleeve. The third limiting block is located on one side of the first limiting block along the circumference of the transmission sleeve. The third spring is used to drive the third limiting block to slide along the direction close to the axis of the transmission sleeve. One end of the third limiting block is provided with a third guide surface. The fourth limiting block is radially slidably connected to the fixed sleeve. The fourth limiting block is located on one side of the second limiting block along the circumference of the fixed sleeve. The fourth spring is used to drive the fourth limiting block to slide along the direction close to the axis of the fixed sleeve. One end of the fourth limiting block is provided with a fourth guide surface. Both the third guide surface and the fourth guide surface are disposed towards the intermediate conductor. The switching assembly is used to change the rotation angle of the drive tube.

[0015] With the above technical solution, when the intermediate conductor needs to advance to break the circuit, the first and second limiting blocks are located in the two limiting grooves respectively, and the third and fourth limiting blocks are located in the first free-stroke groove. Pressing the sealing cover causes the transmission sleeve to advance a certain distance (moving the transmission sleeve towards the intermediate conductor is considered forward movement, and moving it away from the intermediate conductor is considered retraction). Since the first limiting block abuts against the groove wall, it will drive the drive tube forward a certain distance. During the forward movement of the drive tube, the edge of the limiting groove abuts against the second guide surface of the second limiting block, forcing the second limiting block to retract (retraction refers to the second limiting block sliding away from the axis of the transmission sleeve). The second spring is compressed, the return spring is compressed, and after the first limiting block has advanced to its position, the new limiting groove moves to face the second limiting block. In the first limiting position, the second spring returns to its original shape and forces the second limiting block to slide into the new limiting groove. Then, the sealing cover is released, the reset spring returns to its original shape, and the reset spring forces the transmission sleeve and the first limiting block to retract a certain distance. During this process, the first guide surface of the first limiting block abuts against the edge of the limiting groove. The first limiting block retracts (retraction refers to the first limiting block sliding away from the axis of the transmission sleeve). The first spring is compressed, and after the first limiting block retracts into position with the transmission sleeve, the first limiting block moves to a position facing the new limiting groove. The first spring returns to its original shape and forces the first limiting block to slide into the new limiting groove. That is, by pressing and releasing once, the intermediate conductor advances in one step. By pressing and releasing multiple times, the intermediate conductor advances in multiple steps, increasing the breaking distance of the intermediate conductor to achieve circuit breaking.

[0016] When the intermediate conductor needs to be retracted to allow passage, the rotation angle of the drive tube is changed by switching components, while the angles of the transmission sleeve and the fixed tube remain unchanged. At this time, the first and second limit blocks are both located in the second free-stroke groove, and the third and fourth limit blocks are located in the two limit grooves respectively. Pressing the sealing cover causes the sealing cover to move the transmission sleeve forward a certain distance (moving the transmission sleeve towards the intermediate conductor is considered forward movement, and moving the transmission sleeve away from the intermediate conductor is considered retraction). The return spring is compressed, and the fourth limit block restricts the forward movement of the drive tube by abutting against the groove wall of the limit groove. During this process, the third guide surface of the third limit block abuts against the edge of the groove opening of the limit groove, and the third limit block retracts (retraction refers to the third limit block sliding away from the axis of the transmission sleeve). The third spring is compressed, and after the third limit block moves into position with the transmission sleeve, the third limit block moves to a state facing the new limit groove. The third spring returns to its original deformation and forces... The third limiting block slides into the new limiting groove; then the sealing cover is released, the return spring recovers its deformation, and the return spring forces the transmission sleeve and the third limiting block to retract a certain distance. During this process, since the third limiting block abuts against the groove wall of the limiting groove, the third limiting block will drive the drive tube to retract a certain distance. During the retraction of the drive tube, the groove edge of the limiting groove abuts against the fourth guide surface of the fourth limiting block, which will force the fourth limiting block to retract (retraction refers to the fourth limiting block sliding away from the axis of the transmission sleeve). The fourth spring is compressed. After the drive tube retracts into place, the new limiting groove moves to the state facing the fourth limiting block. The fourth spring recovers its deformation and forces the fourth limiting block to slide into the new limiting groove. That is, by pressing and releasing once, the intermediate conductor is retracted in one step. By pressing and releasing multiple times, the intermediate conductor is retracted in multiple steps, so that the first inclined surface and the second inclined surface contact, thereby completing the passage.

[0017] Optionally, the switching assembly includes a sleeve, a steel ball, a fifth spring, and a fixing rod. The sleeve is fixedly connected to the housing and sleeved on the drive tube. The steel ball is radially slidably connected to the inner wall of the sleeve. The elastic force of the fifth spring drives the steel ball to slide along the direction close to the axis of the drive tube. The outer circumferential surface of the drive tube is provided with a first hole and a second hole extending axially. One end of the fixing rod is fixed to the middle of the sealing cover, and the other end of the fixing rod extends into the drive tube. The fixing rod is fixed with a first piece arranged radially on itself, and the inner wall of the drive tube is fixed with a second piece and a third piece arranged radially on itself. When the fixing rod rotates in both directions, the first piece abuts against the second or third piece, so as to drive the drive tube to rotate to a state where the first or second hole on it is directly opposite the steel ball.

[0018] With the above technical solution, in the initial state, the steel ball is inserted into the first hole under the elastic force of the fifth spring. The first and second limiting blocks are located in the two limiting grooves respectively, and the third and fourth limiting blocks are located in the first free-stroke groove. When it is necessary to change the angle of the drive tube, the trigger part is elastically deformed and deflected in the positive direction by a certain angle. The trigger part drives the fixed rod and the first piece to deflect in the positive direction. The first piece abuts against the second piece to drive the drive tube to rotate in the positive direction until the second hole is directly opposite the steel ball. The steel ball is inserted into the second hole to limit the angle of the drive tube. At this time, the first and second limiting blocks are both located in the second free-stroke groove, and the third and fourth limiting blocks are located in the two limiting grooves respectively. Then the trigger part is released, and the trigger part returns to its deformation, that is, the trigger part drives the fixed rod and the first piece to deflect in the opposite direction to the initial position.

[0019] When the angle of the drive tube needs to be reset, the trigger part is elastically deformed and deflected in the opposite direction by a certain angle. The trigger part drives the fixing rod and the first piece to deflect in the opposite direction. The first piece abuts against the third piece to drive the drive tube to rotate in the opposite direction until the first hole is aligned with the steel ball. The steel ball is inserted into the first hole to limit the angle of the drive tube. Then the trigger part is released and the trigger part returns to its deformation, that is, the trigger part drives the fixing rod and the first piece to deflect in the forward direction to the initial position.

[0020] Optionally, the end of the drive tube is rotatably connected to a vertically arranged rubber sleeve, which is fitted onto the intermediate conductor.

[0021] Through the above technical solution, by fitting the rubber sleeve and the intermediate conductor together, the intermediate conductor has a vertical damping sliding characteristic relative to the driving tube. That is, the height position of the intermediate conductor can be damped and adjusted. Therefore, when the intermediate conductor retracts to conduct, the height position of the intermediate conductor will be corrected by the cooperation of the first inclined plane and the second inclined plane, thereby improving the fitting accuracy.

[0022] Optionally, the outer peripheral surface of the drive tube has a clearance groove; when the first inclined surface is in contact with the second inclined surface respectively, the third limiting block is located in the limiting groove, the fourth limiting block is located in the clearance groove, and the tension of the reset spring will drive the drive tube to move towards the sealing cover through the cooperation between the third limiting block and the inner wall of the limiting groove.

[0023] With the above technical solution, when the first inclined surface is in contact with the second inclined surface, that is, when the intermediate conductor is conducting, the third limiting block is located in the limiting groove and the fourth limiting block is located in the clearance groove. At this time, when the sealing cover is pressed again, the transmission sleeve moves forward a certain distance relative to the fixed sleeve, the return spring is compressed, and the third limiting block falls into the first limiting groove. At this time, the sealing cover is released, the return spring is compressed, and since the fourth limiting block is located in the clearance groove, the fourth limiting block has no limiting effect on the drive tube, only the third limiting block has a limiting effect on the drive tube. The tension of the return spring will drive the drive tube to move towards the sealing cover through the cooperation between the third limiting block and the inner wall of the limiting groove, so that the first inclined surface is more tightly attached to the second inclined surface, thereby improving the conduction stability.

[0024] Optionally, both the first conductor and the second conductor have a third inclined surface, with the second inclined surface away from the sealing cap and the third inclined surface facing the sealing cap; both ends of the intermediate conductor are integrally formed with corrugated sections, and the ends of the corrugated sections are integrally formed with hooks, the hooks having a fourth inclined surface and the first inclined surface; when the intermediate conductor retracts, the ends of the hooks abut against the first inclined surface and the corrugated sections elastically deform in the direction away from the sealing cap; when the intermediate conductor advances to a position on the same straight line as the first conductor, the elastic force of the corrugated sections forces the hooks away from the intermediate conductor, the first inclined surface abuts against the second inclined surface, and the fourth inclined surface abuts against the third inclined surface.

[0025] With the above technical solution, when conduction is required, the intermediate conductor retracts, and the end of the hook abuts against the first inclined surface. As the intermediate conductor continues to retract, the corrugated section elastically deforms away from the sealing cover, that is, the distance between the two hooks shortens, and the hooks elastically displace to avoid the second inclined surface. As the intermediate conductor continues to retract (the intermediate conductor is closer to the sealing cover than the first conductor), the hooks pass over the first and second conductors. At this time, the end of the hook abuts against the third inclined surface. The intermediate conductor moves forward until it is aligned with the first conductor. During this process, the fourth inclined surface of the hook gradually fits against the third inclined surface, the first inclined surface of the hook gradually fits against the second inclined surface, and the corrugated section gradually shifts to a vertical state. The elastic force of the corrugated section forces the hooks away from the intermediate conductor, the first inclined surface fits more tightly against the second inclined surface, and the fourth inclined surface fits more tightly against the third inclined surface, thereby greatly improving the contact stability between the intermediate conductor and the first and second conductors respectively.

[0026] In summary, by setting the specific shape of the intermediate conductor and utilizing its long-distance forward and backward movement, the intermediate conductor can move a long distance, allowing the hook to elastically avoid and engage with the second and third inclined planes. As the zigzag section gradually shifts to a vertical position, the elasticity of the zigzag section forces the hook away from the intermediate conductor, making the first inclined plane more closely fit with the second inclined plane, and the fourth inclined plane more closely fit with the third inclined plane. This greatly improves the contact stability between the intermediate conductor and the first and second conductors, respectively.

[0027] Optionally, a counterweight is provided at the lower part of the intermediate conductor.

[0028] The above technical solution can ensure that the intermediate conductor is in a vertical state, thereby reducing the frictional torque of the drive tube and preventing the intermediate conductor from shifting.

[0029] Optionally, a fixing ring coaxial with the through hole is fixed to the outer side of the housing. Multiple stainless steel plates are fixed to the inner diameter of the fixing ring. The stainless steel plates are located in the radial surface of the trigger part and abut against the outer convex surface of the trigger part.

[0030] By using the above technical solution, a stainless steel sheet is placed against the convex surface of the trigger part to limit the shape of the trigger part, thereby keeping the overall shape of the sealing cover stable and reducing the occurrence of excessive deformation of the sealing cover that could lead to sealing failure.

[0031] The beneficial effects of this application are:

[0032] 1. By setting up a sealing cover, a one-way forward assembly, a one-way retraction assembly, and a switching assembly, the switching assembly switches the engagement state of the one-way forward assembly and the one-way retraction assembly with the drive tube. When the one-way forward assembly engages with the drive tube, the intermittent pressing pressure of the sealing cover is transmitted to the drive tube through the transmission sleeve and the one-way forward assembly, causing the intermediate conductor to advance step by step to disengage from the first and second conductors, thereby achieving the disconnection of the voltage transformer body from the external high voltage, facilitating withstand voltage testing. When the one-way retraction component works with the drive tube, the intermittent pressing force of the sealing cover is transmitted to the drive tube through the transmission sleeve and the one-way retraction component, causing the intermediate conductor to retract stepwise to contact the first and second conductors, thereby establishing a path between the voltage transformer body and the external high voltage. Furthermore, since the power source comes from the repeated pressing of the sealing cover, the deformation of the sealing cover itself is small, meaning that the disturbance to the connection position between the sealing cover and the housing is small, thus ensuring the sealing performance of the housing. Secondly, the distance of the multiple pressings of the sealing cover is superimposed by the one-way forward component and the one-way retraction component to lengthen the movement distance of the intermediate conductor, thereby ensuring the stability of the switching.

[0033] 2. By fitting the rubber sleeve onto the intermediate conductor, the intermediate conductor has a vertical damping sliding characteristic relative to the driving tube. That is, the height position of the intermediate conductor can be damped and adjusted. Therefore, when the intermediate conductor retracts to conduct, the height position of the intermediate conductor will be corrected by the cooperation of the first and second inclined surfaces, thereby improving the fitting accuracy.

[0034] 3. By setting the specific shape of the intermediate conductor and utilizing its long-distance forward and backward movement, the intermediate conductor can move a long distance, allowing the hook to elastically avoid and engage with the second and third inclined planes. As the zigzag section gradually shifts to a vertical position, the elasticity of the zigzag section forces the hook away from the intermediate conductor, making the first inclined plane more closely fit with the second inclined plane, and the fourth inclined plane more closely fit with the third inclined plane. This greatly improves the contact stability between the intermediate conductor and the first and second conductors, respectively. Attached Figure Description

[0035] Figure 1 is a schematic diagram of the main body of the voltage transformer in Embodiment 1.

[0036] Figure 2 is a partial cross-sectional view of the housing in the conductive state of Embodiment 1.

[0037] Figure 3 is a partial cross-sectional view of the shell in the fractured state of Embodiment 1.

[0038] Figure 4 is a magnified view of part A in Figure 2.

[0039] Figure 5 is a schematic diagram of the driving transistor in Example 1.

[0040] Figure 6 is a cross-sectional view along the BB direction in Figure 2.

[0041] Figure 7 is a cross-sectional view along the CC direction in Figure 2.

[0042] Figure 8 is a cross-sectional view along the DD direction in Figure 2.

[0043] Figure 9 is a magnified view of part E in Figure 3.

[0044] Figure 10 is a cross-sectional view of Embodiment 1, showing the positional relationship between the first limiting block, the third limiting block, the limiting groove, and the second idle groove after the drive tube angle is adjusted.

[0045] Figure 11 is a partial cross-sectional view of the shell in the fractured state of Embodiment 2.

[0046] Figure 12 is a schematic diagram of the intermediate conductor in Example 3.

[0047] Figure 13 is a partial cross-sectional view of the shell in the fractured state of Embodiment 4.

[0048] Figure 14 is a schematic diagram of the intermediate conductor in Example 5.

[0049] Figure 15 is a schematic diagram of Example 5 illustrating the process of the intermediate conductor gradually engaging with the first and second conductors.

[0050] Explanation of reference numerals in the attached drawings: 10. Sealing cap; 101. Triggering part; 102. Conical ring part; 103. Connecting part; 105. Cross groove; 100. Voltage transformer body; 1001. Through hole; 1002. Fixing ring; 1003. Stainless steel sheet; 110. Housing; 11. Intermediate conductor; 111. Counterweight; 112. First inclined surface; 113. First ring groove; 115. Rubber sleeve; 116. Corrugated section; 117. Hook part; 118. Fourth inclined surface; 1151. Third ring groove; 12. First conductor; 121. Second inclined surface; 122. Third inclined surface; 13. Second conductor; 15. Drive tube; 151. First ring part; 152. First hole; 153. Second hole; 155. Limiting groove; 156. First idle groove; 157. Second idle groove ; 158. Clearance groove; 16. Sleeve; 161. Steel ball; 162. Fifth spring; 163. Fifth slide groove; 165. Support rod; 17. Fixed sleeve; 18. Transmission sleeve; 181. Second annular groove; 182. Return spring; 19. Fixed rod; 191. First piece; 192. Second piece; 193. Third piece; 195. Second ring; 196. Disc; 21. First limiting block; 211. First guide surface; 22. Second limiting block; 221. Second guide surface; 23. First spring; 231. First slide groove; 24. Second spring; 241. Second slide groove; 31. Third limiting block; 311. Third guide surface; 32. Fourth limiting block; 321. Fourth guide surface; 33. Third spring; 331. Third slide groove; 34. Fourth spring. Detailed Implementation

[0051] The embodiments of this application are described in detail below, and examples of the embodiments are shown in Figures 1-15.

[0052] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0053] Example 1

[0054] Example 1 discloses a voltage transformer with a break, as shown in Figures 1, 2, 3, and 4. The voltage transformer with a break includes a voltage transformer body 100, an inner conductor, and a switching mechanism. The voltage transformer body 100 has a housing 110, and a circular through hole 1001 is opened on one side of the housing 110. A rubber sealing cover 10 is fixed inside the through hole 1001. Specifically, the sealing cover 10 includes a trigger part 101, a conical ring part 102, and a connecting part 103 from the middle to the outer periphery. The connecting part 103 is bonded and fixed to the inner wall of the through hole 1001. The trigger part 101 is bullet-shaped, and the outer convex surface of the trigger part 101 is located outside the through hole 1001. The outer convex surface of the trigger part 101 is provided with a cross groove 105 so that external tools can press or twist the trigger part 101 through the cross groove 105.

[0055] The inner conductor includes a first conductor 12, an intermediate conductor 11, and a second conductor 13. The first conductor 12 and the second conductor 13 are both fixedly installed inside the voltage transformer body 100. The first conductor 12 and the second conductor 13 are located on the same straight line and there is a vertical gap between the first conductor 12 and the second conductor 13. The gap is a break. The intermediate conductor 11 is vertically installed. Both ends of the intermediate conductor 11 are provided with a first inclined surface 112. The lower end of the first conductor 12 and the upper end of the second conductor 13 are provided with a second inclined surface 121.

[0056] The switching mechanism is used to drive the intermediate conductor 11 to move horizontally so that the first inclined surface 112 is in contact with or away from the second inclined surface 121. When the first inclined surface 112 and the second inclined surface 121 are in contact, the first conductor 12, the intermediate conductor 11 and the second conductor 13 are in a closed circuit state. When the first inclined surface 112 and the second inclined surface 121 are out of contact, the first conductor 12, the intermediate conductor 11 and the second conductor 13 are in a closed circuit state.

[0057] As shown in Figures 2, 4, 5, and 6, the switching mechanism includes a one-way forward component, a one-way backward component, and a switching component. A counterweight 111 is fixed to the lower part of the intermediate conductor 11. The intermediate conductor 11 is connected to a drive tube 15, which is made of insulating material and is horizontally arranged. Specifically, a first annular groove 113 is provided on one side of the middle part of the intermediate conductor 11, and a first ring portion 151 is fixed to one end of the drive tube 15. The first ring portion 151 and the first annular groove 113 are rotatably engaged.

[0058] The outer peripheral surface of the drive tube 15 is provided with a first hole 152 and a second hole 153 extending along the axial direction; the outer peripheral surface of the drive tube 15 is provided with a plurality of axially spaced limiting grooves 155, and the outer peripheral surface of the drive tube 15 is provided with a strip-shaped first empty groove 156 and a strip-shaped second empty groove 157 extending along the axial direction. The first empty groove 156 and the second empty groove 157 are respectively located on both sides of the circumferential direction of the limiting groove 155 and are connected to the limiting groove 155.

[0059] The switching assembly is used to change the rotation angle of the drive tube 15 relative to the intermediate conductor 11. Specifically, the switching assembly includes a sleeve 16, a steel ball 161, a fifth spring 162, and a fixing rod 19. The sleeve 16 is fixedly connected to the housing 110 through a support rod 165. The sleeve 16 is sleeved on the drive tube 15, that is, the drive tube 15 can rotate relative to the sleeve 16. The inner wall of the sleeve 16 is provided with a fifth sliding groove 163, which extends radially along the sleeve 16. The steel ball 161 slides and engages with the fifth sliding groove 163. The fifth spring 162 is located in the fifth sliding groove 163. The elastic force of the fifth spring 162 drives the steel ball 161 to slide along the direction close to the axis of the drive tube 15, so as to force the steel ball 161 to be inserted into the first hole 152 or the second hole 153.

[0060] The fixing rod 19 is coaxially arranged with the drive tube 15. One end of the fixing rod 19 is fixed to the middle of the trigger part 101, and the other end of the fixing rod 19 extends into the drive tube 15. The fixing rod 19 is fixed with a first piece 191 arranged radially. The inner wall of the drive tube 15 is fixed with a second piece 192 and a third piece 193 arranged radially. The second piece 192 and the third piece 193 are located on the circumferential movement path of the first piece 191.

[0061] A disk 196 is coaxially fixed to a fixed rod 19. A second ring portion 195 is fixed to the outer circumferential surface of the disk 196. A transmission sleeve 18 is provided on the outer side of the fixed rod 19. The transmission sleeve 18 is coaxial with the fixed rod 19. A second ring groove 181 is provided on the inner wall of the transmission sleeve 18. The second ring portion 195 is rotatably engaged with the second ring groove 181.

[0062] A fixed sleeve 17 is fixed on the inner wall of the housing 110 and is coaxially arranged with the through hole 1001. A return spring 182 is fixed between the fixed sleeve 17 and the transmission sleeve 18. That is, the two ends of the return spring 182 are fixedly connected to the fixed sleeve 17 and the transmission sleeve 18 respectively. The return spring 182 is coaxially arranged with the drive tube 15. The fixed sleeve 17 can prevent the transmission sleeve 18 from spinning. The elastic force of the return spring 182 is used to force the transmission sleeve 18 to move away from the intermediate conductor 11.

[0063] As shown in Figures 4, 5, 7, and 8, the unidirectional forward component includes a first limiting block 21, a second limiting block 22, a first spring 23, and a second spring 24. The inner wall of the transmission sleeve 18 is provided with a radially extending first sliding groove 231. The first limiting block 21 slides in conjunction with the first sliding groove 231. The first spring 23 is located within the first sliding groove 231 and is used to drive the first limiting block 21 to slide along a direction close to the axis of the transmission sleeve 18. One end of the first limiting block 21 is provided with a first guide surface 211. The inner wall of the fixed sleeve 17 is provided with a radially extending second sliding groove 241. The second limiting block 22 slides in conjunction with the second sliding groove 241 and is located within the second sliding groove 241. The second spring 24 is used to drive the second limiting block 22 to slide along a direction close to the axis of the fixed sleeve 17. One end of the second limiting block 22 is provided with a second guide surface 221. Both the first guide surface 211 and the second guide surface 221 are set away from the intermediate conductor 11.

[0064] As shown in Figures 3, 8, 9, and 10, the one-way retraction assembly includes a third limiting block 31, a fourth limiting block 32, a third spring 33, and a fourth spring 34. The inner wall of the transmission sleeve 18 is provided with a radially extending third sliding groove 331, located on one side of the first sliding groove 231 along the circumference of the transmission sleeve 18. The third limiting block 31 slides into the third sliding groove 331. The third spring 33 is located within the third sliding groove 331 and is used to drive the third limiting block 31 to slide along a direction close to the axis of the transmission sleeve 18. One end of the 1 is provided with a third guide surface 311; the inner wall of the fixed sleeve 17 is provided with a radially extending fourth slide groove (not shown in the figure), the fourth slide groove is located on one side of the second slide groove 241 along the circumference of the fixed sleeve 17, the fourth limiting block 32 slides and engages with the fourth slide groove, the fourth spring 34 is located in the fourth slide groove, the fourth spring 34 is used to drive the fourth limiting block 32 to slide along the direction close to the axis of the fixed sleeve 17, one end of the fourth limiting block 32 is provided with a fourth guide surface 321, and both the third guide surface 311 and the fourth guide surface 321 are set towards the middle conductor 11.

[0065] The implementation principle of Example 1 is as follows: When the intermediate conductor 11 needs to be advanced to break the circuit, the steel ball 161 is inserted into the first hole 152 under the elastic force of the fifth spring 162. The first limiting block 21 and the second limiting block 22 are respectively located in the two limiting grooves 155, and the third limiting block 31 and the fourth limiting block 32 are located in the first idle groove 156 (see Figures 5 and 7). Pressing the sealing cover 10 causes the sealing cover 10 to drive the transmission sleeve 18 forward a certain distance (the transmission sleeve 18 moves forward in the direction towards the intermediate conductor 11, and moves forward in the direction away from the intermediate conductor 11). (Moving away from the intermediate conductor 11 is considered retraction). Since the first limiting block 21 abuts against the wall of the limiting groove 155, the first limiting block 21 will drive the drive tube 15 forward a certain distance. During the forward movement of the drive tube 15, the edge of the limiting groove 155 abuts against the second guide surface 221 of the second limiting block 22, forcing the second limiting block 22 to retract (retraction refers to the second limiting block 22 sliding away from the axis of the transmission sleeve 18). The second spring 24 is compressed, the return spring 182 is compressed, and after the first limiting block 21 reaches its forward position, the new... The limiting groove 155 moves to a position directly opposite the second limiting block 22. The second spring 24 returns to its original deformation and forces the second limiting block 22 to slide into the new limiting groove 155. Then, the sealing cover 10 is released, the return spring 182 returns to its original deformation, and the return spring 182 forces the transmission sleeve 18 and the first limiting block 21 to retract a certain distance. During this process, the first guide surface 211 of the first limiting block 21 abuts against the edge of the groove opening of the limiting groove 155. The first limiting block 21 retracts (retraction refers to the first limiting block 21 moving away from the axis of the transmission sleeve 18). (Sliding), the first spring 23 is compressed, and after the first limiting block 21 retracts into position with the transmission sleeve 18, the first limiting block 21 moves to a state facing the new limiting groove 155. The first spring 23 restores its deformation and forces the first limiting block 21 to slide into the new limiting groove 155. That is, by pressing and releasing once, the intermediate conductor 11 completes one step forward. By pressing and releasing multiple times, the intermediate conductor 11 completes multiple step forwards, increasing the disconnection distance of the intermediate conductor 11 to achieve circuit breaking, so as to facilitate the withstand voltage test.

[0066] When it is necessary to retract the intermediate conductor 11 to allow passage, the rotation angle of the drive tube 15 is changed by switching the component. Specifically, by using an external tool in conjunction with the cross groove 105, the trigger part 101 is elastically deformed and deflected in the positive direction by a certain angle (at this time, the elastic deformation of the tapered part is larger, and the elastic deformation of the connecting part 103 is smaller). The trigger part 101 drives the fixing rod 19 and the first plate 191 to deflect in the positive direction. The first plate 191 abuts against the second plate 192, thereby driving the drive tube 15 to rotate in the positive direction. Until the second hole 153 is aligned with the steel ball 161, the steel ball 161 is inserted into the second hole 153 to limit the angle of the drive tube 15. At this time, the first limiting block 21 and the second limiting block 22 are both located in the second idle groove 157, and the third limiting block 31 and the fourth limiting block 32 are respectively located in the two limiting grooves 155 (see Figures 9 and 10). Then the trigger part 101 is released, and the trigger part 101 returns to its original shape. That is, the trigger part 101 drives the fixing rod 19 and the first piece 191 to deflect in the opposite direction to the initial position.

[0067] The angle between the transmission sleeve 18 and the fixed tube remains unchanged. Then, the sealing cover 10 is pressed, and the sealing cover 10 drives the transmission sleeve 18 forward a certain distance (the transmission sleeve 18 moving towards the intermediate conductor 11 is forward movement, and the transmission sleeve 18 moving away from the intermediate conductor 11 is retraction). The return spring 182 is compressed, and the fourth limiting block 32 abuts against the groove wall of the limiting groove 155 to restrict the forward movement of the drive tube 15. During this process, the third guide surface 311 of the third limiting block 31 abuts against the limiting groove 155. The third limiting block 31 retracts from the groove edge of 55 (retraction refers to the sliding of the third limiting block 31 away from the axis of the transmission sleeve 18), the third spring 33 is compressed, and after the third limiting block 31 moves into position with the transmission sleeve 18, the third limiting block 31 moves to a state directly facing the new limiting groove 155, the third spring 33 returns to its deformation and forces the third limiting block 31 to slide into the new limiting groove 155; then the sealing cover 10 is released, the return spring 182 returns to its deformation, and the return spring 182 forces the transmission sleeve 18 and the third limiting block 31 retract a certain distance. During this process, because the third limiting block 31 abuts against the groove wall of the limiting groove 155, the third limiting block 31 will drive the drive tube 15 to retract a certain distance. During the retraction of the drive tube 15, the groove edge of the limiting groove 155 abuts against the fourth guide surface 321 of the fourth limiting block 32, which will force the fourth limiting block 32 to retract (retraction refers to the fourth limiting block 32 sliding away from the axis of the transmission sleeve 18). The fourth spring 34 is compressed, and the drive tube 15... After retracting into position, the new limiting groove 155 moves to face the fourth limiting block 32. The fourth spring 34 recovers its deformation and forces the fourth limiting block 32 to slide into the new limiting groove 155. That is, by pressing and releasing once, the intermediate conductor 11 is retracted in one step. By pressing and releasing multiple times, the intermediate conductor 11 is retracted in multiple steps, so that the first inclined surface 112 and the second inclined surface 121 come into contact, thereby realizing the path between the voltage transformer body 100 and the external high voltage.

[0068] When the angle of the drive tube 15 needs to be reset, the trigger part 101 is elastically deformed and deflected in the opposite direction by a certain angle. The trigger part 101 drives the fixing rod 19 and the first piece 191 to deflect in the opposite direction. The first piece 191 abuts against the third piece 193 to drive the drive tube 15 to rotate in the opposite direction until the first hole 152 is directly opposite the steel ball 161. The steel ball 161 is inserted into the first hole 152 to limit the angle of the drive tube 15. Then the trigger part 101 is released and the trigger part 101 returns to its deformation. That is, the trigger part 101 drives the fixing rod 19 and the first piece 191 to deflect in the forward direction to the initial position.

[0069] In summary, since the power source comes from repeated pressing of the sealing cover 10, the deformation of the sealing cover 10 itself is small, that is, the disturbance to the connection position between the sealing cover 10 and the housing 110 is small, thereby ensuring the sealing performance of the housing 110.

[0070] Secondly, the distance of pressing the sealing cover 10 multiple times will be superimposed by the one-way forward component and the one-way backward component to lengthen the movement distance of the intermediate conductor 11, thereby ensuring the stability of the switching.

[0071] Example 2

[0072] The difference between Embodiment 2 and Embodiment 1 is that, as shown in FIG11, the outer peripheral surface of the drive tube 15 has a clearance groove 158.

[0073] When the first inclined surface 112 is in contact with the second inclined surface 121, that is, when the intermediate conductor 11 is conducting, the third limiting block 31 is located in the limiting groove 155 and the fourth limiting block 32 is located in the clearance groove 158. At this time, when the sealing cover 10 is pressed again, the transmission sleeve 18 moves forward a certain distance relative to the fixed sleeve 17, the return spring 182 is compressed, and the fourth limiting block 32 restricts the advancement of the drive tube 15 by abutting against the groove wall of the limiting groove 155. During this process, the third guide surface 311 of the third limiting block 31 abuts against the groove edge of the limiting groove 155, the third limiting block 31 retracts (retraction refers to the third limiting block 31 sliding away from the axis of the transmission sleeve 18), the third spring 33 is compressed, and the third limiting block 31... After the transmission sleeve 18 moves forward to its position, the third limiting block 31 moves to a position directly facing the new limiting groove 155. The third spring 33 recovers its deformation and forces the third limiting block 31 to slide into the new limiting groove 155. At this time, the sealing cover 10 is released, and the return spring 182 is compressed. Since the fourth limiting block 32 is located in the clearance groove 158, the fourth limiting block 32 has no limiting effect on the drive tube 15. Only the third limiting block 31 has a limiting effect on the drive tube 15. The tension of the return spring 182 will drive the drive tube 15 to move towards the sealing cover 10 through the cooperation between the third limiting block 31 and the inner wall of the limiting groove 155. This makes the first inclined surface 112 fit more tightly against the second inclined surface 121, thereby improving the conduction stability.

[0074] Example 3

[0075] The difference between Embodiment 3 and Embodiment 1 is that, as shown in Figure 12, the intermediate conductor 11 is fitted with a rubber sleeve 115, which gives the intermediate conductor 11 a vertical damping sliding characteristic relative to the driving tube 15. The rubber sleeve 115 is provided with a third annular groove 1151, and the first annular portion 151 of the driving tube 15 is rotatably engaged with the third annular groove 1151 to reduce the influence of the rotation of the driving tube 15 on the deflection of the intermediate conductor 11.

[0076] Because the intermediate conductor 11 has a vertical damping sliding characteristic relative to the driving tube 15, the height position of the intermediate conductor 11 can be damped and adjusted. Therefore, when the intermediate conductor 11 retracts to conduct, the height position of the intermediate conductor 11 will be corrected through the cooperation of the first inclined surface 112 and the second inclined surface 121, thereby improving the cooperation accuracy.

[0077] Example 4

[0078] The difference between Embodiment 4 and Embodiment 1 is that, as shown in Figure 13, a fixing ring 1002 coaxial with the through hole 1001 is fixed on the outer side of the housing 110. Multiple stainless steel sheets 1003 are fixed on the inner diameter of the fixing ring 1002. Each stainless steel sheet 1003 is evenly arranged along the circumference of the through hole 1001. The stainless steel sheets 1003 are located in the radial surface of the trigger part 101 and abut against the outer convex surface of the trigger part 101.

[0079] The stainless steel sheet 1003 abuts against the protruding surface of the trigger part 101 to limit the shape of the trigger part 101, thereby keeping the overall shape of the sealing cover 10 stable and reducing the occurrence of excessive deformation of the sealing cover 10 leading to sealing failure.

[0080] Example 5

[0081] The difference between Example 5 and Example 1 is that, as shown in Figures 14 and 15, both the first conductor 12 and the second conductor 13 have a third inclined surface 122. The second inclined surface 121 is away from the sealing cover 10, and the third inclined surface 122 is towards the sealing cover 10. That is, the end contours of the first conductor 12 and the second conductor 13 are trapezoidal.

[0082] Both ends of the intermediate conductor 11 are integrally formed with corrugated sections 116, which are elastic. The ends of the corrugated sections 116 are integrally formed with hooks 117, which are V-shaped and have a fourth inclined surface 118 and a first inclined surface 112.

[0083] When it is necessary to connect the first conductor 12 and the second conductor 13, the intermediate conductor 11 retracts, and the end of the hook 117 abuts against the first inclined surface 112. As the intermediate conductor 11 continues to retract, the corrugated section 116 elastically deforms in the direction away from the sealing cover 10, that is, the distance between the two hooks 117 shortens, and the hooks 117 elastically displace to avoid the second inclined surface 121. As the intermediate conductor 11 continues to retract (the intermediate conductor 11 is closer to the sealing cover 10 than the first conductor 12), the hooks 117 pass over the first conductor 12 and the second conductor 13. At this time, the end of the hook 117 abuts against the third inclined surface 122, causing the intermediate conductor 11 to move forward. As the intermediate conductor 11 advances until it is aligned with the first conductor 12, the fourth inclined surface 118 of the hook 117 gradually comes into contact with the third inclined surface 122, the first inclined surface 112 of the hook 117 gradually comes into contact with the second inclined surface 121, and the zigzag section 116 gradually shifts to a vertical position. The elastic force of the zigzag section 116 will force the hook 117 away from the intermediate conductor 11, the first inclined surface 112 will come into closer contact with the second inclined surface 121, and the fourth inclined surface 118 will come into closer contact with the third inclined surface 122, thereby greatly improving the contact stability between the intermediate conductor 11 and the first conductor 12 and the second conductor 13 respectively.

[0084] In summary, by setting the specific shape of the intermediate conductor 11 and utilizing its long-distance forward and backward movement, the intermediate conductor 11 can move a long distance, allowing the hook 117 to elastically avoid and engage with the second inclined plane 121 and the third inclined plane 122. Then, by utilizing the corrugated section 116 to gradually shift to a vertical state, the elasticity of the corrugated section 116 forces the hook 117 away from the intermediate conductor 11, making the first inclined plane 112 more closely fit with the second inclined plane 121, and the fourth inclined plane 118 more closely fit with the third inclined plane 122. This greatly improves the contact stability between the intermediate conductor 11 and the first conductor 12 and the second conductor 13, respectively.

[0085] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A voltage transformer with a break, characterized in that, The transformer includes a voltage transformer body (100), an inner conductor, and a switching mechanism. The voltage transformer body (100) has a housing (110) with a through hole (1001) and a rubber sealing cap (10) fixed inside the through hole (1001). The inner conductor includes a first conductor (12), an intermediate conductor (11), and a second conductor (13). The first conductor (12) and the second conductor (13) are both fixed inside the voltage transformer body (100) and are located on the same straight line. The intermediate conductor (11) is vertically arranged, and both ends of the intermediate conductor (11) are provided with a first inclined surface (112). The lower end of the first conductor (12) and the upper end of the second conductor (13) are provided with a second inclined surface (121). The switching mechanism is used to drive the intermediate conductor (11) to move horizontally so that the first inclined surface (112) is in contact with or away from the second inclined surface (121). 21); The switching mechanism includes a one-way forward component, a one-way backward component, and a switching component. The intermediate conductor (11) is connected to a drive tube (15), and the sealing cover (10) is connected to a transmission sleeve (18). The switching component is used to switch the engagement state of the one-way forward component and the one-way backward component with the drive tube (15). When the one-way forward component is engaged with the drive tube (15), the intermittent pressing pressure of the sealing cover (10) will be transmitted to the drive tube (15) through the transmission sleeve (18) and the one-way forward component to drive the intermediate conductor (11) to advance step by step to disengage from the first conductor (12) and the second conductor (13). When the one-way backward component is engaged with the drive tube (15), the intermittent pressing pressure of the sealing cover (10) will be transmitted to the drive tube (15) through the transmission sleeve (18) and the one-way backward component to drive the intermediate conductor (11) to retreat step by step to contact the first conductor (12) and the second conductor (13).

2. The voltage transformer with a break according to claim 1, characterized in that, The sealing cap (10) includes a trigger part (101), a conical ring part (102) and a connecting part (103) from the middle to the outer periphery. The connecting part (103) is bonded and fixed to the inner wall of the through hole (1001). The trigger part (101) is bullet-shaped. The outer convex surface of the trigger part (101) is located outside the through hole (1001). The inner concave part of the trigger part (101) is connected to the transmission sleeve (18).

3. The voltage transformer with a break according to claim 1, characterized in that, A disc (196) is coaxially fixed in the middle of the sealing cover (10), and the outer periphery of the disc (196) is coaxially rotatably connected to the port of the transmission sleeve (18); a fixing sleeve (17) is fixed on the inner wall of the housing (110) and coaxially arranged with the through hole (1001), and a return spring (182) is fixed between the fixing sleeve (17) and the transmission sleeve (18), the elastic force of the return spring (182) is used to force the transmission sleeve (18) to move in a direction away from the intermediate conductor (11); one end of the drive tube (15) is rotatably arranged relative to the intermediate conductor (11), and the surface of the other end of the drive tube (15) is provided with a plurality of axially spaced limiting grooves (155), the drive tube (15) The outer peripheral surface of the sleeve (18) is provided with a first empty groove (156) and a second empty groove (157) extending axially. The first empty groove (156) and the second empty groove (157) are located on both sides of the limiting groove (155) and communicate with the limiting groove (155). The unidirectional forward component includes a first limiting block (21), a second limiting block (22), a first spring (23), and a second spring (24). The first limiting block (21) is radially slidably connected to the transmission sleeve (18). The first spring (23) is used to drive the first limiting block (21) to slide along the direction close to the axis of the transmission sleeve (18). One end of the first limiting block (21) is provided with a first guide surface (211). The second limiting block (22) The second spring (24) is radially slidably connected to the fixed sleeve (17), and is used to drive the second limiting block (22) to slide along the direction close to the axis of the fixed sleeve (17). One end of the second limiting block (22) is provided with a second guide surface (221). The first guide surface (211) and the second guide surface (221) are both set away from the intermediate conductor (11). The one-way retraction assembly includes a third limiting block (31), a fourth limiting block (32), a third spring (33), and a fourth spring (34). The third limiting block (31) is radially slidably connected to the transmission sleeve (18). The third limiting block (31) is located on one side of the first limiting block (21) along the circumference of the transmission sleeve (18). The third spring (33) is used to drive the second limiting block (22) to slide along the axis of the fixed sleeve (17). The third limiting block (31) slides along the axis near the transmission sleeve (18). One end of the third limiting block (31) is provided with a third guide surface (311). The fourth limiting block (32) is radially slidably connected to the fixed sleeve (17). The fourth limiting block (32) is located on one side of the second limiting block (22) along the circumference of the fixed sleeve (17). The fourth spring (34) is used to drive the fourth limiting block (32) to slide along the axis near the fixed sleeve (17). One end of the fourth limiting block (32) is provided with a fourth guide surface (321). Both the third guide surface (311) and the fourth guide surface (321) are set towards the intermediate conductor (11). The switching component is used to change the rotation angle of the drive tube (15).

4. The voltage transformer with a break according to claim 3, characterized in that, The switching assembly includes a sleeve (16), a steel ball (161), a fifth spring (162), and a fixing rod (19). The sleeve (16) is fixedly connected to the housing (110). The sleeve (16) is sleeved on the drive tube (15). The steel ball (161) is radially slidably connected to the inner wall of the sleeve (16). The elastic force of the fifth spring (162) drives the steel ball (161) to slide along the axis close to the drive tube (15). The outer circumferential surface of the drive tube (15) is provided with a first hole (152) and a second hole (153) extending axially. One end of the fixing rod (19) is connected to the sealing cover. (10) The middle part is fixed, and the other end of the fixing rod (19) extends into the drive tube (15). The fixing rod (19) is fixed with a first piece (191) arranged in its own radial direction. The inner wall of the drive tube (15) is fixed with a second piece (192) and a third piece (193) arranged in its own radial direction. When the fixing rod (19) rotates in the forward and reverse directions, the first piece (191) on it abuts against the second piece (192) or the third piece (193) to drive the drive tube (15) to rotate to the state where the first hole (152) or the second hole (153) on it is facing the steel ball (161).

5. The voltage transformer with a break according to claim 1, characterized in that, The end of the drive tube (15) is rotatably connected to a vertically arranged rubber sleeve (115), which is fitted onto the intermediate conductor (11).

6. The voltage transformer with a break according to claim 3, characterized in that, The outer peripheral surface of the drive tube (15) has a clearance groove (158); when the first inclined surface (112) is in contact with the second inclined surface (121), the third limiting block (31) is located in the limiting groove (155), the fourth limiting block (32) is located in the clearance groove (158), and the tension of the reset spring (182) will drive the drive tube (15) to move toward the sealing cover (10) through the cooperation between the third limiting block (31) and the inner wall of the limiting groove (155).

7. The voltage transformer with a break according to claim 1, characterized in that, Both the first conductor (12) and the second conductor (13) have a third inclined surface (122), the second inclined surface (121) being away from the sealing cap (10), and the third inclined surface (122) facing the sealing cap (10); the two ends of the intermediate conductor (11) are integrally formed with corrugated sections (116), and the ends of the corrugated sections (116) are integrally formed with hooks (117), the hooks (117) having a fourth inclined surface (118) and the first inclined surface (112); when the intermediate conductor (11) retracts, the The end of the hook (117) abuts against the first inclined surface (112) and the corrugated section (116) elastically deforms in the direction away from the sealing cap (10); when the intermediate conductor (11) advances to be in the same straight line as the first conductor (12), the elastic force of the corrugated section (116) forces the hook (117) away from the intermediate conductor (11), the first inclined surface (112) fits against the second inclined surface (121), and the fourth inclined surface (118) fits against the third inclined surface (122).

8. The voltage transformer with a break according to claim 5, characterized in that, The lower part of the intermediate conductor (11) is provided with a counterweight (111).

9. The voltage transformer with a break according to claim 2, characterized in that, A fixing ring (1002) coaxial with the through hole (1001) is fixed on the outer side of the housing (110). A plurality of stainless steel plates (1003) are fixed on the inner diameter of the fixing ring (1002). The stainless steel plates (1003) are located in the radial surface of the trigger part (101) and abut against the outer convex surface of the trigger part (101).

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