A high-voltage switchgear with opening / closing angle detection

Abstract

This invention relates to the field of electrical switch technology, specifically to a high-voltage switchgear with opening / closing angle detection, comprising a support base, support columns, and conductive arms mounted on the support columns; there are at least two support columns arranged in pairs, and each pair of conductive arms is provided with a contact finger and a conductive head; the contact finger includes a power component, two adjustment components, and two clamping arms. In the initial stage of opening, the power component causes the two clamping arms to rotate and open; in the final stage of closing, the power component causes the two clamping arms to rotate and retract, reducing contact with the conductive head and thus reducing wear. When the clamping arms rotate, the adjustment components cause one clamping arm to extend away from the support column, and the other clamping arm to retract towards its corresponding support column, aligning with the offset direction of the side of the contacting conductive head. There is no relative movement between the contact finger and the conductive head, further reducing frictional wear between them.

Description

Technical Field

[0001] This invention relates to the field of electrical switch technology, and more specifically to a high-voltage switch device with opening and closing angle detection. Background Technology

[0002] High-voltage switchgear is a crucial component of power systems, primarily used for controlling the switching on and off of circuits to ensure the safe operation of power equipment and the stability and reliability of the power system. With the development of the power industry, the performance requirements for high-voltage switchgear are constantly increasing, especially in terms of the reliability of switching operations, the stability of electrical contacts, and the service life of the equipment.

[0003] In existing high-voltage switchgear, common structural designs include components such as a support base, an insulating support column, and conductive arms. Typically, the switchgear uses a drive mechanism to rotate the support column, thereby enabling the closing or opening operation of the two conductive arms in the same group. During closing, the two conductive arms tend to be coaxial, allowing the conductive head to insert between the clamping arms of the contact fingers, achieving electrical conduction; during opening, the conductive arms rotate in the opposite direction, the conductive head disengages from the clamping arms, and the circuit is broken. This structure has proven effective and reliable in long-term operational practice.

[0004] However, in actual operation, especially under frequent operation or high current conditions, mechanical and electrical wear easily occurs between the contact fingers and conductive heads of the switchgear. One of the main sources of wear is the relative movement between the conductive head and the clamping arm during opening and closing. This relative movement causes friction between the conductive head and the clamping arm, which, over time, can damage the contact surface, increase contact resistance, and even lead to poor contact or arc erosion, seriously affecting the electrical connection performance and service life of the switchgear. Summary of the Invention

[0005] This invention provides a high-voltage switchgear with opening and closing angle detection to solve the problem of easy wear at the contact position when the switchgear is closed and opened in existing switchgear.

[0006] The high-voltage switchgear with opening / closing angle detection according to the present invention adopts the following technical solution: A high-voltage switchgear with opening / closing angle detection includes a support base, support columns, and conductive arms. There are at least two support columns arranged in pairs, each vertically and rotatably mounted on the support base. Two support columns in the same pair rotate synchronously in opposite directions. Each support column is connected to one conductive arm. The conductive arms on two support columns in the same pair form a group, and each conductive arm in the same group has a contact finger and a conductive head at its closest approach ends. The contact finger includes a power component, two adjustment components, and two clamping arms. The two clamping arms are arranged sequentially in a horizontal direction and are both rotatable around a vertical axis and slidably mounted on the conductive arm along their own axial direction. The clamping arms are connected to the conductive arm... The electric arms are electrically connected; when closing, the two conductive arms in the same group rotate until they are nearly coaxial, and the conductive head enters between the two clamping arms and contacts them; when opening, the two conductive arms in the same group rotate from coaxial to far apart; when opening, the power component drives the two clamping arms to rotate, causing the ends of the two clamping arms near the conductive head to open, and when closing, it drives the two clamping arms to rotate and retract to reset; two adjustment components correspond one-to-one with the two clamping arms. When opening and closing, one adjustment component causes the clamping arm located in front of the contact finger rotation direction to move away from the support column and extend, while the other adjustment component causes the other clamping arm to move towards the support column and retract.

[0007] Optionally, a hinge shaft is mounted on the conductive arm, and a sliding groove is provided on the clamping arm to slide and rotate with the hinge shaft; the adjustment assembly includes a first elastic element, a vortex wheel, and a roller. The first elastic element is disposed between the clamping arm and the hinge shaft and causes the clamping arm to move towards the support column; the vortex wheel is mounted on the conductive arm, and the outer peripheral wall of the vortex wheel is a curved surface along the vortex path. The proximal and distal ends of the vortex path are transitioned by a smooth surface, and the vortex paths of the outer peripheral walls of the vortex wheels of the two adjustment assemblies are opposite; the roller is mounted on the clamping arm and abuts against the outer peripheral wall of the vortex wheel; when closing and opening, the two clamping arms rotate around the hinge shaft while the conductive arm rotates, causing the roller to move along the outer peripheral wall of the vortex wheel. The roller on the clamping arm located in front of the direction of the contact finger rotation causes the clamping arm to move away from the support column under the push of the vortex wheel, and the other clamping arm moves towards the support column and retracts under the action of the first elastic element.

[0008] Optionally, the vortex wheel is rotatably mounted on the conductive arm and coaxial with the hinge shaft, and the inner ring of the vortex wheel is provided with multiple ratchet grooves, and the end face is provided with multiple helical guide grooves; the conductive arm is also provided with at least two telescopic ratchets, each telescopic ratchet corresponding to a ratchet groove of the inner ring of the vortex wheel, used to limit the rotation of the vortex wheel relative to the conductive arm; a push plate is provided between the vortex wheel and the conductive arm, the push plate is coaxial with the hinge shaft and rotates synchronously with the clamping arm; the push plate is provided with a push rod that elastically extends and retracts along its radial direction; the conductive arm is provided with a guide surface, and one end of the push rod extends out of the push plate and... The guide surface abuts against the contact, and the other end engages with the spiral guide groove. Before the circuit is opened to the preset position after the conductive head and the contact finger are completely disengaged, the telescopic ratchet restricts the rotation of the vortex wheel. After the circuit is opened to the preset position, as the push plate continues to rotate with the clamping arm relative to the conductive arm, the guide surface guides the push rod to move, so that the other end of the push rod moves along the spiral guide groove while pushing the vortex wheel to rotate relative to the telescopic ratchet by a preset angle. The next ratchet groove on the vortex wheel engages with the telescopic ratchet, thereby changing the extension or retraction length of the clamping arm relative to the conductive arm and changing the contact position between the clamping arm and the conductive head.

[0009] Optionally, the power assembly includes a central push rod, a second elastic element, and two connecting rods. The central push rod is slidably mounted on the conductive arm and located between the two clamping arms, and is connected to the conductive arm through the second elastic element. The conductive arm also has two arc-shaped guide grooves, each corresponding to a hinge axis as the center. A sliding rod is slidably connected along the axial direction of one end of the clamping arm near the support column. The central push rod is hinged to the sliding rods of the two clamping arms through the two connecting rods, and the hinge position of the connecting rods and the sliding rods is restricted to move along the guide grooves. During the closing process, after the conductive head enters between the two clamping arms, the central push rod abuts against the conductive head and is pushed by the conductive head to move towards the support column. During the opening process, the conductive head and the central push rod tend to move away from each other. The central push rod moves under the action of the second elastic element and drives the two clamping arms to rotate through the connecting rods.

[0010] Optionally, the end of the clamping arm away from the support column is a conductive plate, which can extend and retract along the distribution direction when the two clamping arms are parallel.

[0011] Optionally, an angle sensor is provided between the support column and the support base to monitor the rotation angle of the support column relative to the support base.

[0012] Optionally, the two support columns in the same group are connected by a transmission rod, and the transmission rod is hinged to the eccentric position of the two support columns respectively.

[0013] Optionally, each adjustment component has two volutes and two rollers, located on the upper and lower sides of the clamping arm respectively, and arranged symmetrically in the upper and lower positions; each clamping arm has two push plates, located between the two volutes and the conductive arm respectively.

[0014] Optionally, the pitch angle corresponding to two adjacent ratchet grooves on the vortex wheel is consistent with the angle of rotation of the clamping arm relative to the conductive arm when the circuit is opened.

[0015] Optionally, a sliding block is slidably installed in the sliding groove, the sliding block is in contact with the arc surface of the hinge shaft, and the first elastic element connects the sliding block and the clamping arm.

[0016] The beneficial effects of the present invention are: the high-voltage switchgear with opening and closing angle detection of the present invention reduces contact with the conductive head by rotating and opening the two clamping arms in the initial stage of opening and rotating and closing the two clamping arms in the final stage of closing, thereby reducing wear.

[0017] Furthermore, the adjustment assembly moves one clamping arm to extend away from the support post and the other clamping arm to retract towards the support post, which is consistent with the offset direction of the corresponding contacting conductive head on one side. This ensures that there is no relative movement between the contact finger and the conductive head, thereby further reducing friction and wear between the contact finger and the conductive head.

[0018] Furthermore, by setting the push plate and the vortex wheel to cooperate in one direction, after the circuit is opened and the contact finger is completely separated from the conductive head, the vortex wheel rotates at a preset angle. Under the push of the roller and the vortex wheel, the clamping arm extends or retracts relative to the conductive arm. When the circuit is closed again, the initial contact position and the final contact position of the conductive head and the clamping arm change, avoiding long-term contact at a single position that will cause wear and affect the conductivity efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the high-voltage switchgear with opening / closing angle detection according to the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional schematic diagram of the conductive arm in an embodiment of the high-voltage switchgear with opening / closing angle detection of the present invention. Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram showing the overall structure of an embodiment of the high-voltage switchgear with opening / closing angle detection according to the present invention. Figure 6 This is a schematic diagram showing the disassembled contact fingers in an embodiment of the high-voltage switchgear with opening / closing angle detection according to the present invention; Figure 7 This is a schematic diagram of the structure of one of the clamping arms in an embodiment of the high-voltage switchgear with opening and closing angle detection of the present invention; Figure 8 This is a schematic diagram of another clamping arm in an embodiment of the high-voltage switchgear with opening / closing angle detection of the present invention; Figure 9 for Figure 6 Enlarged view of point C in the middle; Figure 10 This is a side view of the swing arm and contact finger in an embodiment of the high-voltage switchgear with opening / closing angle detection of the present invention; Figure 11 for Figure 10 Schematic diagram of cross section along the HH direction; Figure 12 for Figure 11 Enlarged view of point D in the middle; Figure 13 for Figure 10 A cross-sectional view along the JJ direction; Figure 14 for Figure 13 Enlarged view of point E in the middle; Figure 15 for Figure 10 A cross-sectional diagram along the KK direction; Figure 16 for Figure 15 Enlarged view of point F in the middle; Figure 17 This is a schematic diagram of the initial stage and final state of the tripping process in an embodiment of the high-voltage switchgear with opening / closing angle detection of the present invention.

[0021] In the diagram: 100, support base; 200, support column; 210, transmission rod; 300, conductive arm; 301, guide groove; 302, guide surface; 310, hinge shaft; 320, volute wheel; 321, ratchet groove; 322, spiral guide groove; 330, push plate; 331, push rod; 340, conductive rope; 350, telescopic ratchet; 400, contact finger; 410, power assembly; 411, central push rod; 412, second elastic element; 413, connecting rod; 420, clamping arm; 421, sliding groove; 422, first elastic element; 423, sliding rod; 424, conductive plate; 425, roller; 426, sliding block; 500, conductive head. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] An embodiment of the high-voltage switchgear with opening / closing angle detection according to the present invention is as follows: Figures 1 to 17 As shown, it includes a support base 100, a support column 200, and a conductive arm 300.

[0024] There are at least two support columns 200, arranged in pairs, all vertically and rotatably mounted on the support base 100. The two support columns 200 in the same group rotate synchronously in opposite directions. Specifically, the two support columns 200 in the same group are connected by a transmission rod 210, which is hinged to the eccentric position of each of the two support columns 200. Support columns 200 in different groups located on the same side are also hinged by the transmission rod 210 (not shown in the figure). When one support column 200 rotates under the drive of an external drive structure, it drives all the support columns 200 to rotate. The support columns 200 are insulated structures.

[0025] Each support post 200 is connected to a conductive arm 300. The conductive arms 300 on two support posts 200 in the same group form a group, and the two conductive arms 300 in the same group are respectively provided with a contact finger 400 and a conductive head 500 at their closest ends.

[0026] The contact finger 400 includes a power assembly 410, two adjustment assemblies, and two clamping arms 420. The two clamping arms 420 are arranged sequentially in a horizontal direction and are both rotatable about a vertical axis and slidably mounted on the conductive arm 300 along their own axial direction. The clamping arms 420 are electrically connected to the conductive arm 300; specifically, a conductive rope 340 connects the clamping arms 420 and the conductive arm 300, so that the clamping arms 420 always maintain an electrical connection with the conductive arm 300 when rotating relative to the conductive arm 300. When closing the circuit, the two conductive arms 300 in the same group rotate until they are nearly coaxial, and the conductive head 500 enters between the two clamping arms 420 and contacts the clamping arms 420, realizing the electrical conduction of the two conductive arms 300; when opening the circuit, the two conductive arms 300 in the same group rotate from coaxial to far apart, the conductive head 500 disengages from the two clamping arms 420, and the two conductive arms 300 are disconnected from the electrical connection.

[0027] When the circuit breaker is open, the power assembly 410 drives the two clamping arms 420 to rotate, causing the ends of the two clamping arms 420 near the conductive head 500 to open. When the circuit breaker is closed, the power assembly drives the two clamping arms 420 to rotate and retract to their original positions. Two adjusting assemblies correspond one-to-one with the two clamping arms 420. When the circuit breaker is open or closed, one adjusting assembly causes the clamping arm 420 located in front of the contact finger 400 in the direction of rotation to move away from the support column 200 and extend. The other adjusting assembly causes the other clamping arm 420 to move closer to its supporting column 200 and retract.

[0028] During circuit breaking, the two conductive arms 300 in the same group rotate synchronously in opposite directions, moving from the coaxial direction towards separation. The power assembly 410 rotates relative to the conductive arms 300 as the two clamping arms 420 revolve around them, increasing the angle between the two clamping arms 420 and accelerating the disengagement of the conductive head 500 from between them. For ease of explanation, the two clamping arms 420 are defined as the first arm and the second arm, respectively. During circuit breaking, in the initial stage of the two conductive arms 300 rotating from the coaxial position towards separation, the first arm is located in front of the contact finger 400 in the direction of rotation, and the second arm is located behind the contact finger 400 in the direction of rotation. The side of the conductive head 500 in contact with the second arm will move closer to the contact finger 400, while the side of the conductive head 500 in contact with the first arm will move away from the contact finger 400, resulting in friction and wear between the conductive head 500 and the clamping arms 420. When the circuit breaker is tripped, the first arm extends and the second arm retracts. The directions of the extension of the first arm and the retraction of the second arm are consistent with the offset directions of the two sides of the conductive head 500, so as to reduce the relative movement distance between the contact finger 400 and the conductive head 500, thereby reducing the friction and wear between them.

[0029] Conversely, when the circuit is closed and the two conductive arms 300 rotate to their final, nearly coaxial position, the first arm is positioned behind the contact finger 400 in the direction of rotation, and the second arm is positioned in front of the contact finger 400 in the direction of rotation. The side of the conductive head 500 that contacts the first arm will move closer to the contact finger 400, and the side of the conductive head 500 that contacts the second arm will move further away from the contact finger 400. The adjusting assembly retracts the first arm and extends the second arm during closing, aligning with the offset direction of the conductive head 500 on both sides, thus reducing friction and wear with the contact finger 400.

[0030] In summary, by rotating and opening the two clamping arms 420 during the initial opening phase and rotating and retracting them during the final closing phase, contact with the conductive head 500 is reduced, thereby minimizing wear. Furthermore, the adjusting assembly moves one clamping arm 420 away from the support column 200 and retracts the other clamping arm 420 towards its corresponding support column 200, aligning with the offset direction and speed of the respective contacting conductive head 500. This ensures no relative movement between the contact finger 400 and the conductive head 500, further reducing frictional wear between them.

[0031] In this embodiment, a hinge shaft 310 is rotatably mounted on the conductive arm 300, and a sliding groove 421 is provided on the clamping arm 420 to slide and rotate with the hinge shaft 310. The adjustment assembly includes a first elastic element 422, a vortex wheel 320, and a roller 425. The first elastic element 422 is disposed between the clamping arm 420 and the hinge shaft 310 and causes the clamping arm 420 to move towards the support column 200 where it is located. Specifically, a sliding block 426 is slidably mounted in the sliding groove 421. The sliding block 426 is in contact with the arc surface of the hinge shaft 310, and the first elastic element 422 connects the sliding block 426 and the clamping arm 420. The vortex wheel 320 is mounted on the conductive arm 300. The outer peripheral wall of the vortex wheel 320 is a curved surface along a vortex path. The proximal and distal ends of the vortex path are transitioned by a smooth surface. The vortex paths of the outer peripheral walls of the vortex wheels 320 of the two adjustment assemblies are opposite. Rollers 425 are mounted on clamping arms 420 and abut against the outer peripheral wall of the volute wheel 320. Specifically, the rollers 425 of the two adjusting components are located on the side of their respective volute wheels 320 closest to the conductive head 500 and the side furthest from the conductive head 500. During closing and opening, the two clamping arms 420 rotate around the hinge shaft 310 while rotating with the conductive arm 300, causing the rollers 425 to move along the outer peripheral wall of the volute wheel 320. The roller 425 on the clamping arm 420 located in front of the rotating direction of the contact finger 400 causes the clamping arm 420 to extend away from the support column 200 under the push of the volute wheel 320, while the other clamping arm 420 retracts towards its support column 200 under the action of the first elastic element 422.

[0032] In this embodiment, the vortex wheel 320 is rotatably mounted on the conductive arm 300 and coaxial with the hinge shaft 310. The inner ring of the vortex wheel 320 is provided with multiple ratchet grooves 321, and the end face is provided with multiple helical guide grooves 322. The conductive arm 300 is also provided with at least two telescopic ratchet teeth 350, each corresponding to a ratchet groove 321 on the inner ring of the vortex wheel 320, used to restrict the rotation of the vortex wheel 320 relative to the conductive arm 300. Specifically, the telescopic ratchet tooth 350 includes a ratchet block and a spring connecting the ratchet block and the conductive arm 300. The ratchet groove 321 is radially inclined relative to the vortex wheel 320. When the ratchet block engages with the ratchet groove 321, the vortex wheel 320 rotates synchronously with the conductive arm 300 and allows the vortex wheel 320 to rotate unidirectionally relative to the conductive arm 300. A push plate 330 is provided between the vortex wheel 320 and the conductive arm 300. The push plate 330 is coaxial with the hinge shaft 310 and rotates synchronously with the clamping arm 420. Specifically, the clamping arm 420 has at least two guide grooves, and a guide rod is fixedly provided on the push plate 330. The guide rod cooperates with the guide grooves to make the push plate 330 rotate synchronously with the clamping arm 420. A push rod 331 that elastically extends and retracts along its radial direction is provided on the push plate 330. The push rod 331 passes through the hinge shaft 310 and drives the hinge shaft 310 to rotate synchronously. The conductive arm 300 is provided with a guide surface 302. One end of the push rod 331 extends out of the push plate 330 and abuts against the guide surface 302, and the other end is provided with a protrusion that cooperates with the spiral guide groove 322. Specifically, the guide surface 302 includes a first arc surface coaxial with the hinge shaft 310 and a second arc surface that connects with the first arc surface. The second arc surface extends relative to the first arc surface towards the center of the hinge shaft 310. Before the circuit breaker is fully disengaged from the conductive head 500 and the contact finger 400 to the preset position, the telescopic ratchet 350 restricts the rotation of the vortex wheel 320, and the push rod 331 abuts against the first arc surface. After the circuit breaker is fully disengaged to the preset position, as the push plate 330 continues to rotate with the clamping arm 420 relative to the conductive arm 300, the second arc surface of the guide surface 302 guides the push rod 331 to move, so that the other end of the push rod 331 moves along the spiral guide groove 322 while pushing the vortex wheel 320 to rotate relative to the telescopic ratchet 350 by a preset angle. The next ratchet groove 321 on the vortex wheel 320 cooperates with the telescopic ratchet 350, thereby changing the extension or retraction length of the clamping arm 420 relative to the conductive arm 300, and changing the contact position between the clamping arm 420 and the conductive head 500. After the vortex wheel 320 rotates to a preset angle, during the next closing, the rotation of the clamping arm 420 will drive the push plate 330 to rotate and reset until the push rod 331 returns to contact with the first arc surface, and the other end of the push rod 331 will cooperate with the next adjacent spiral guide groove 322.

[0033] By setting the push plate 330 and the volute wheel 320 to cooperate in one direction, after the circuit is opened and the contact finger 400 is completely separated from the conductive head 500, the volute wheel 320 rotates at a preset angle. Under the push of the roller 425 and the volute wheel 320, the clamping arm 420 extends or retracts relative to the conductive arm 300. When the circuit is closed again, the initial contact position and the final contact position of the conductive head 500 and the clamping arm 420 change, avoiding wear caused by long-term contact at a single position, which affects the conductivity efficiency.

[0034] In this embodiment, the power assembly 410 includes a central push rod 411, a second elastic element 412, and two connecting rods 413. The central push rod 411 is slidably mounted on the conductive arm 300 and located between the two clamping arms 420, and is connected to the conductive arm 300 through the second elastic element 412. The central push rod 411 is made of insulating material. The conductive arm 300 also has two arc-shaped guide grooves 301, each guide groove 301 corresponding to a hinge axis 310 as its center. A sliding rod 423 is slidably connected along its axial direction at one end of the clamping arm 420 near its supporting column 200. The central push rod 411 is hinged to the sliding rods 423 of the two clamping arms 420 respectively through the two connecting rods 413, and the hinge position of the connecting rods 413 and the sliding rods 423 is restricted to move along the guide grooves 301. In this circuit, the end of the connecting rod 413 that is hinged to the central push rod 411 is always located on the side away from its supporting column 200, where the end of the connecting rod 423 is hinged to the sliding rod 423. During the closing process, after the conductive head 500 enters between the two clamping arms 420, the central push rod 411 abuts against the conductive head 500 and is pushed by the conductive head 500 towards its supporting column 200, thereby causing the two clamping arms 420 to rotate and close via the connecting rod 413. During the opening process, the conductive head 500 tends to move away from the central push rod 411. The central push rod 411 moves under the action of the second elastic element 412 and causes the two clamping arms 420 to rotate and open via the connecting rod 413. After the central push rod 411 is completely disengaged from the conductive head 500, the central push rod 411 continues to rotate under the action of the second elastic element 412, thereby causing the push plate 330 to rotate via the clamping arms 420, causing the vortex wheel 320 to rotate at a preset angle.

[0035] In this embodiment, the end of the clamping arm 420 away from the support column 200 is a conductive plate 424, which can extend and retract along the distribution direction when the two clamping arms 420 are parallel. Specifically, the conductive plate 424 has a double-layer structure and is formed by bending the same metal plate. The two layers are connected by a spring, which enables the conductive plate 424 to remain in contact with the conductive head 500.

[0036] In this embodiment, an angle sensor (not shown in the figure) is provided between the support column 200 and the support base 100 to monitor the rotation angle of the support column 200 relative to the support base 100. The angle sensor can be used to determine whether the support column 200 is rotating abnormally.

[0037] In this embodiment, each adjustment component has two scroll wheels 320 and two rollers 425, located on the upper and lower sides of the clamping arm 420 respectively, and arranged symmetrically in the upper and lower positions. Each clamping arm 420 has two push plates 330, located between the two scroll wheels 320 and the conductive arm 300 respectively. Correspondingly, two pairs of telescopic ratchet teeth 350 are also provided, which cooperate with the two pairs of scroll wheels 320 respectively.

[0038] In this embodiment, the division angles corresponding to the two adjacent ratchet grooves 321 on the volute 320 are consistent with the angle of rotation of the clamping arm 420 relative to the conductive arm 300 during opening, and both are preset angles. This avoids the roller 425 passing over the smooth surface between the proximal and distal ends of the outer peripheral wall of the volute 320 during opening or closing, which would affect the extension or retraction of the clamping arm 420.

[0039] In the fully closed state, the high-voltage switchgear with opening / closing angle detection of the present invention has two conductive arms 300 in the same group located between two support columns 200 and coaxial, and a conductive head 500 located between two clamping arms 420 and in contact with the clamping arms 420, and the two conductive arms 300 in the same group are electrically connected. When opening is required, an external drive structure drives one of the support columns 200 to rotate, and the support column 200 drives the other support columns 200 to rotate synchronously through the transmission rod 210. The two support columns 200 in the same group rotate in opposite directions, causing the two conductive arms 300 to swing to the same side until the two conductive arms 300 rotate to parallel. In the initial stage of opening, the central push rod 411 tends to move away from the conductive head 500, and then moves under the action of the second elastic member 412 and drives the two clamping arms 420 to rotate around their respective corresponding hinge axes 310 through the connecting rod 413, and the included angle of the two clamping arms 420 on the side closer to the conductive head 500 opens. Simultaneously, when the clamping arm 420 rotates, the roller 425 moves along the outer peripheral wall of the volute 320. The roller 425 on the clamping arm 420 located in the front of the rotation direction is pushed by the volute 320, causing the clamping arm 425 to move away from the support column 200. The other clamping arm 420 moves closer to the support column 200 under the action of the first elastic element 422. The moving direction of the two clamping arms 420 is consistent with the offset direction of one side of the corresponding contacting conductive head 500, so that there is no relative movement between the contact finger 400 and the conductive head 500, which can further reduce the friction and wear between the contact finger 400 and the conductive head 500.

[0040] Before the circuit breaker is fully disengaged from the conductive head 500 and the contact finger 400 to the preset position, the telescopic ratchet 350 restricts the rotation of the vortex wheel 320, and the push rod 331 abuts against the first arc surface. After the circuit breaker is fully disengaged to the preset position, as the push plate 330 continues to rotate with the clamping arm 420 relative to the conductive arm 300, the second arc surface of the guide surface 302 guides the push rod 331 to move, so that the other end of the push rod 331 moves along the spiral guide groove 322 while pushing the vortex wheel 320 to rotate relative to the telescopic ratchet 350 by a preset angle. The next ratchet groove 321 on the vortex wheel 320 cooperates with the telescopic ratchet 350, thereby changing the extension or retraction length of the clamping arm 420 relative to the conductive arm 300, and changing the contact position between the clamping arm 420 and the conductive head 500.

[0041] When closing is required, the external drive structure drives the support column 200 to rotate in the opposite direction, and the two conductive arms 300 in the same group swing to the same side and tend to be coaxial. At the end of the closing stage, after the conductive arm 300 rotates to the point where the conductive head 500 enters between the two clamping arms 420, the central push rod 411 abuts against the conductive head 500. As the conductive head 500 continues to rotate with the conductive arm 300, it pushes the central push rod 411 to move. The central push rod 411 drives the two clamping arms 420 to rotate and retract through the connecting rod 413. The clamping arm 420 drives the roller 425 to roll along the outer peripheral wall of the volute 320. This causes the roller 425 on the clamping arm 420 located at the front of the rotation direction to extend away from its supporting column 200 under the push of the volute 320. Meanwhile, the other clamping arm 420 retracts towards its supporting column 200 under the action of the first elastic element 422. The movement direction of the two clamping arms 420 is consistent with the offset direction of one side of their respective contacting conductive head 500, ensuring no relative movement between the contact finger 400 and the conductive head 500, further reducing friction and wear. Closing is completed when the two conductive arms 300 rotate to the coaxial position.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-voltage switchgear with opening / closing angle detection, characterized in that, Includes a support base, support column, and conductive arm; There are at least two support columns, arranged in pairs, both vertically and rotatably mounted on the support base, with the two support columns in the same group rotating synchronously in opposite directions; Each support column is connected to a conductive arm. The conductive arms on two support columns in the same group form a group, and the two conductive arms in the same group are respectively provided with a contact finger and a conductive head at their closest ends. The contact finger includes a power assembly, two adjustment assemblies, and two clamping arms. The two clamping arms are arranged sequentially in the horizontal direction and can rotate around a vertical axis and slide along their own axial direction on the conductive arm. The clamping arms are electrically connected to the conductive arm. When the circuit is closed, the two conductive arms in the same group rotate until they are close to the same axis, and the conductive head enters between the two clamping arms and contacts the clamping arm. When the circuit is opened, the two conductive arms in the same group rotate from the same axis to move away from each other. When the circuit breaker is open, the power unit drives the two clamping arms to rotate, causing the ends of the two clamping arms near the conductive head to open. When the circuit breaker is closed, the power unit drives the two clamping arms to rotate and retract to reset. The two adjustment components correspond one-to-one with the two clamping arms. When the circuit breaker is open or closed, one of the adjustment components causes the clamping arm located in front of the contact finger rotation direction to move away from the support column and extend, while the other adjustment component causes the other clamping arm to move towards the support column and retract.

2. The high-voltage switchgear with opening / closing angle detection according to claim 1, characterized in that, A hinge shaft is mounted on the conductive arm, and a sliding groove is provided on the clamping arm to slide and rotate with the hinge shaft. The adjustment assembly includes a first elastic element, a vortex wheel, and a roller. The first elastic element is located between the clamping arm and the hinge shaft and causes the clamping arm to move towards the support column. The vortex wheel is mounted on the conductive arm, and the outer peripheral wall of the vortex wheel is a curved surface along the vortex path. The proximal and distal ends of the vortex path are transitioned by a smooth surface. The vortex paths of the outer peripheral walls of the vortex wheels of the two adjustment assemblies are opposite. The roller is mounted on the clamping arm and abuts against the outer peripheral wall of the vortex wheel. When closing and opening the circuit, the two clamping arms rotate around the hinge shaft while the conductive arm rotates, causing the roller to move along the outer peripheral wall of the vortex wheel. The roller on the clamping arm located in front of the direction of the contact finger rotation causes the clamping arm to move away from the support column under the push of the vortex wheel, while the other clamping arm moves towards the support column and retracts under the action of the first elastic element.

3. The high-voltage switchgear with opening / closing angle detection according to claim 2, characterized in that, A vortex wheel is rotatably mounted on the conductive arm and coaxial with the hinge shaft. The inner ring of the vortex wheel has multiple ratchet grooves, and its end face has multiple helical guide grooves. The conductive arm also has at least two telescopic ratchet teeth, each corresponding to a ratchet groove on the inner ring of the vortex wheel, used to limit the rotation of the vortex wheel relative to the conductive arm. A push plate is positioned between the vortex wheel and the conductive arm, coaxial with the hinge shaft and rotating synchronously with the clamping arm. The push plate has a push rod that elastically extends and retracts radially. The conductive arm has a guide surface, with one end of the push rod extending out of the push plate and connecting to the guide surface. One end abuts against the other, and the other end engages with the spiral guide groove. Before the circuit breaker is fully disengaged from the contact finger and reaches the preset position, the telescopic ratchet restricts the rotation of the vortex wheel. After the circuit breaker is fully disengaged from the preset position, as the push plate continues to rotate with the clamping arm relative to the contact arm, the guide surface guides the push rod to move, causing the other end of the push rod to move along the spiral guide groove while pushing the vortex wheel to rotate relative to the telescopic ratchet by a preset angle. The next ratchet groove on the vortex wheel engages with the telescopic ratchet, thereby changing the extension or retraction length of the clamping arm relative to the contact arm and changing the contact position between the clamping arm and the contact head.

4. The high-voltage switchgear with opening / closing angle detection according to claim 2, characterized in that, The power assembly includes a central push rod, a second elastic element, and two connecting rods. The central push rod is slidably mounted on the conductive arm and located between the two clamping arms, and is connected to the conductive arm through the second elastic element. The conductive arm also has two arc-shaped guide grooves, each corresponding to a hinge axis as its center. A sliding rod is slidably connected along its axial direction at the end of the clamping arm near the support column. The central push rod is hinged to the sliding rods of the two clamping arms through the two connecting rods, and the hinge position of the connecting rods and the sliding rods is restricted to move along the guide grooves. During the closing process, after the conductive head enters between the two clamping arms, the central push rod abuts against the conductive head and is pushed by the conductive head towards the support column. During the opening process, the conductive head tends to move away from the central push rod. The central push rod moves under the action of the second elastic element and drives the two clamping arms to rotate through the connecting rods.

5. The high-voltage switchgear with opening / closing angle detection according to claim 1, characterized in that, The end of the clamping arm away from the support column is a conductive plate, which can extend and retract along the distribution direction when the two clamping arms are parallel.

6. The high-voltage switchgear with opening / closing angle detection according to claim 1, characterized in that, An angle sensor is installed between the support column and the support base to monitor the rotation angle of the support column relative to the support base.

7. The high-voltage switchgear with opening / closing angle detection according to claim 1, characterized in that, The two support columns in the same group are connected by a transmission rod, which is hinged to the eccentric position of each of the two support columns.

8. The high-voltage switchgear with opening / closing angle detection according to claim 3, characterized in that, Each adjustment component has two volutes and two rollers, located on the upper and lower sides of the clamping arm respectively, and arranged symmetrically in the upper and lower positions; each clamping arm has two push plates, located between the two volutes and the conductive arm respectively.

9. The high-voltage switchgear with opening / closing angle detection according to claim 3, characterized in that, The division angle corresponding to two adjacent ratchet grooves on the vortex wheel is consistent with the angle of rotation of the clamping arm relative to the conductive arm when the circuit is opened.

10. The high-voltage switchgear with opening / closing angle detection according to claim 3, characterized in that, A sliding block is slidably installed in the sliding groove. The sliding block is in contact with the arc surface of the hinge shaft. The first elastic element connects the sliding block and the clamping arm.

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