Vacuum arc extinguish chamber replacement mechanism and calibration structure of primary and secondary fusion pole-mounted circuit breaker

Abstract

The invention belongs to the technical field of circuit breakers, particularly relates to a vacuum arc extinguish chamber replacement mechanism and a calibration structure of a primary and secondary fusion pole-mounted circuit breaker, and provides the following scheme aiming at the problems that an existing vacuum arc extinguish chamber is relatively tedious to mount and dismount and the moving stroke calibration efficiency of a moving contact is low: the vacuum arc extinguish chamber replacement mechanism comprises a circuit breaker body; a plurality of shells are fixed at the top of the circuit breaker body, arc extinguish chambers are placed in the shells, and a plurality of movable conducting rods extending into the shells penetrate through the top of the circuit breaker body in a sliding manner; according to the invention, the lifting of the lifting rods is controlled through the cover plate, so that the installation and disassembly of the arc extinguish chamber can be completed synchronously, the operation is simple, and the connection stability of the moving contact and the static contact at the two ends of the arc extinguish chamber can be ensured in the installation process. The lifting touch panel is controlled to ascend and descend through cooperation of the rotating rod and the lead screw, and the lifting distance of the lifting touch panel is controlled in real time through cooperation of the laser sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a vacuum interrupter replacement mechanism and a calibration structure of a primary-secondary fusion column mounted circuit breaker. Background Art

[0002] The primary and secondary fusion pole-mounted circuit breaker has short-circuit fault and overvoltage protection functions. Its overcurrent protection function is completed by the magnetic induction coil. It is widely used in power supply systems because of its complete maintenance functions, easy maintenance and use. When the circuit breaker is in use, the vacuum interrupter on it is inevitably damaged. Therefore, in order to ensure that the circuit breaker can continue to be used, the vacuum interrupter needs to be replaced.

[0003] In the prior art, the vacuum interrupter still has the following deficiencies when it is replaced: 1. The vacuum interrupter is generally installed on the circuit breaker through many bolts installed in different positions and corresponding mounting frames. Therefore, the operation is very cumbersome during the later replacement process. Many bolts are easily lost during disassembly and installation, which affects the installation stability of the vacuum interrupter; 2. In addition, after the vacuum interrupter is installed, in order to ensure the normal operation of the circuit breaker, the moving stroke of the moving contact in the vacuum interrupter needs to be adjusted. In the prior art, the moving stroke of the moving contact is mostly adjusted by a vernier caliper, a wrench, a screwdriver, etc., which are used to adjust the position of the moving contact. This adjustment method requires multiple adjustments to achieve the corresponding moving stroke, so the calibration efficiency is low.

[0004] In view of the above problems, the present invention document proposes a vacuum interrupter replacement mechanism and calibration structure for a primary-secondary fusion column mounted circuit breaker. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the existing vacuum interrupter that the installation and disassembly is complicated and the calibration efficiency of the moving stroke of the moving contact is low, and to propose a vacuum interrupter replacement mechanism and calibration structure for a primary and secondary fusion column-mounted circuit breaker.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A vacuum interrupter replacement mechanism for a primary and secondary fusion column mounted circuit breaker comprises a circuit breaker body, a plurality of shells are fixed on the top of the circuit breaker body, the arc extinguishing chambers are placed in the shells, and a plurality of movable conductive rods extending into the shells are slidably penetrated through the top of the circuit breaker body; It also includes two lifting rods sliding on the inner walls of the shell on both sides away from each other, a cover plate is detachably fixed to the top of the shell by bolts, and the cover plate is used to press the two lifting rods downward, a rubber clamping plate is provided on the side of the two lifting rods close to each other, and a clamping structure for driving the rubber clamping plate to move and clamp the arc extinguishing chamber is provided between the shell and the lifting rods, and the clamping structure includes a threaded rod fixed on the side of the rubber clamping plate away from the arc extinguishing chamber, and one end of the threaded rod slides through the shell and extends to one side of the shell; It also includes two trapezoidal rods that slide through the moving conductive rod, the moving contact of the arc extinguishing chamber extends into the moving conductive rod, and a fixed connection is provided in the shell for driving the trapezoidal rod to be inserted into the second trapezoidal groove to complete the fixation between the moving conductive rod and the moving contact.

[0007] In a possible design, a circular ring is fixed at the bottom of the cover plate, and a contact piece is slidably connected inside the circular ring. The static contact of the arc extinguishing chamber extends into the circular ring and contacts with the bottom of the contact piece. A static conductive rod that slides through the cover plate is fixed to the top of the contact piece. The outer wall of the static conductive rod is fixedly sleeved with an insulating plate located above the cover plate. A first tension spring is fixed between the bottom of the insulating plate and the top of the cover plate, and the first tension spring is sleeved on the outer wall of the static conductive rod to make the contact piece tightly fit the top of the static contact. The cover plate is installed on the top of the shell by bolts. During the process of tightening the bolts, the cover plate moves down and is tightly attached to the top of the shell. The contact piece is tightly attached to the top of the static contact of the arc extinguishing chamber under the tension of the first tension spring, thereby ensuring the stability of the connection between the static conductive rod and the arc extinguishing chamber.

[0008] In a possible design, the clamping structure also includes a rectangular groove arranged in the lifting rod, and one end of the threaded rod passes through the rectangular groove, the outer wall of the threaded rod is threadedly sleeved with a nut block, and the nut block is located on one side of the shell, and the nut block is rotatably connected to a rotating ring on the side close to the shell, a second tension spring is fixed between the rotating ring and the shell, and the second tension spring is sleeved on the outer wall of the threaded rod, and the cooperation between the threaded rod and the nut block is used to control the tensile strength of the second tension spring, a first trapezoidal groove located in the shell is provided in the threaded rod, a push rod is fixed to the bottom inner wall of the rectangular groove, and the top end of the push rod cooperates with the first trapezoidal groove, so that when the lifting rod moves up, the threaded rod is driven to move to release the clamping of the rubber splint on the arc extinguishing chamber, and two first guide rods are fixed on the bottom inner wall of the shell, and the top ends of the two first guide rods slide and extend to In the corresponding lifting rod, a spring is fixed between the bottom inner wall of the shell and the bottom end of the lifting rod, and the spring is sleeved on the outer wall of the first guide rod to drive the lifting rod to move up and reset, and the elastic force of the spring is greater than the tension of the second tension spring; when the lifting rod moves down, the top rod moves down and its top end disengages from the first trapezoidal groove, and the threaded rod and the rubber clamp move toward the middle after losing the obstruction of the top rod, and the two rubber clamps clamp and fix the arc extinguishing chamber from both sides; in addition, by rotating the nut block, the nut block is driven to move outward, so that the second tension spring can be stretched to control the clamping force of the rubber clamp on the arc extinguishing chamber; on the contrary, when the cover plate is removed from the shell, the lifting rod moves up and reset under the action of the spring, and the cooperation of the top rod and the first trapezoidal groove drives the threaded rod and the rubber clamp to move outward, thereby releasing the clamping of the arc extinguishing chamber, which is convenient for the later replacement of the arc extinguishing chamber.

[0009] In a possible design, the fixed connection includes two pushing blocks sliding on the inner wall of the bottom of the shell, the two pushing blocks are located on both sides of the moving conductive rod, a sliding bar is fixed on the ends of the two trapezoidal rods away from each other, and the two sliding bars are slidably connected to the corresponding pushing blocks, a first fixed block is fixed on the side of the two pushing blocks close to each other, a third tension spring is fixed between the bottom of the two first fixed blocks and the top of the corresponding sliding bar, an inclined groove is provided on one side of the two pushing blocks, a pin rod is fixed in the two inclined grooves, a V-shaped rod is slidably connected to the inner wall of the bottom of the shell, two ends of the V-shaped rod slide through the two inclined grooves respectively, two track grooves are provided in the V-shaped rod, the two pin rods are slidably set in the corresponding track grooves respectively, and the V-shaped rod is used for The two pushing blocks are driven to move toward each other, and a push plate is fixed on the top of the V-shaped rod, and a connecting rod is rotatably connected to the side of the push plate away from the moving conductive rod. The top of the connecting rod is rotatably connected to one side of an adjacent lifting rod, and the lifting rod drives the V-shaped rod to move through the connecting rod. Second trapezoidal grooves are provided on both sides of the moving contact of the arc extinguishing chamber, and the second trapezoidal groove is located in the moving conductive rod, and the trapezoidal rod cooperates with the second trapezoidal groove to clamp the moving contact and move it down and tightly fit the bottom inner wall of the moving conductive rod; the cover plate pushes the two lifting rods to move downward, and one of the lifting rods cooperates with the connecting rod to drive the push plate and the V-shaped rod to move, and the V-shaped rod drives the two pushing blocks and the trapezoidal rod to move toward the middle through the cooperation of the track groove and the pin rod, and the trapezoidal rod extends into the second trapezoidal groove, and the cooperation of the trapezoidal rod and the second trapezoidal groove can tightly fix the moving contact of the arc extinguishing chamber in the moving conductive rod.

[0010] In a possible design, two positioning grooves are provided at the bottom of the cover plate, and the top ends of the two lifting rods extend into the corresponding positioning grooves for positioning the lifting rods. A bellows is fixed between the bottom of the insulating plate and the top of the cover plate, and the bellows is located on the outer wall of the static conductive rod for protecting the static conductive rod. The bellows is located in the first tension spring.

[0011] In a possible design, a plurality of limit plates are fixed in the shell, a same pad is placed on the top of two of the limit plates, and the pad is slidably arranged in the shell, the moving contact of the arc extinguishing chamber passes through the pad, and the pad and the limit plate cooperate to support the arc extinguishing chamber.

[0012] A calibration structure is used to calibrate the stroke of the moving conductive rod in the vacuum interrupter replacement mechanism of the above-mentioned primary and secondary fusion column mounted circuit breaker, comprising a plurality of second guide rods fixed to the top inner wall of the circuit breaker body, the outer wall sliding sleeves of the plurality of second guide rods are provided with the same vertical plate, a plurality of fourth tension springs are fixed between the top of the vertical plate and the top inner wall of the circuit breaker body, and the fourth tension springs are sleeved on the outer walls of the second guide rods, a rotating shaft is rotatably connected in the circuit breaker body, a cam is fixedly sleeved on the outer wall of the rotating shaft, and an adjustment structure for adjusting the stroke of the moving conductive rod is provided in the circuit breaker body.

[0013] In a possible design, the adjustment structure includes a lifting touch plate sliding in the circuit breaker body, and the lifting touch plate is located below the cam, and two second fixed blocks arranged up and down are fixed to the side of the vertical plate close to the lifting touch plate, a screw rod is rotatably connected between the two second fixed blocks, and the screw rod thread penetrates the lifting touch plate, the outer wall of the screw rod is fixedly sleeved with a first bevel gear, and the bottom of the second fixed block located above is rotatably connected to a rotating rod through a base plate, one end of the rotating rod is fixed with a second bevel gear meshing with the first bevel gear, and the end of the rotating rod away from the second bevel gear extends to one side of the circuit breaker body, and a plurality of the moving conductive rods are fixedly penetrated Insulating rod, one end of each of the insulating rods is fixedly connected to the vertical plate, and a laser sensor for detecting the lifting distance of the lifting touch plate is fixed to the bottom inner wall of the circuit breaker body; the second bevel gear is driven to rotate by the rotating rod, and the second bevel gear is engaged with the first bevel gear to drive the screw to rotate, thereby driving the lifting touch plate to move up and down, and controlling the distance between the lifting touch plate and the rotating shaft. Then, the handle and the rotating shaft are manually turned 90°, and the protruding part of the cam pushes the lifting touch plate downward, thereby controlling the stroke of the moving conductive rod. In addition, the laser sensor detects the lifting distance of the lifting touch plate in real time, and thereby can complete the calibration of the stroke of the moving conductive rod by controlling the adjustment distance of the lifting touch plate. The operation is simple and accurate.

[0014] In a possible design, one end of the rotating shaft rotates through the circuit breaker body and extends to one side of the circuit breaker body, a handle is fixed to one end of the rotating shaft for driving the cam to rotate, and a limit block is fixed to one side of the circuit breaker body for limiting the handle.

[0015] In a possible design, a clearance groove is provided on one side of the circuit breaker body, one end of the rotating rod passes through the clearance groove, a closing plate is rotatably sleeved on the outer wall of the rotating rod, and the closing plate slides on one side of the circuit breaker body to close the clearance groove; when the cam drives the lifting touch plate and the vertical plate to lift, the rotating rod drives the closing plate to move, and the closing plate always closes the clearance groove during the movement process to prevent external dust and insects from entering the circuit breaker body.

[0016] Beneficial effect: In the present invention, a nut block is provided on the threaded sleeve of the outer wall of the threaded rod, a rubber clamp is fixed on one end of the threaded rod, a second tension spring fixedly connected to the shell is fixed on one side of the nut block through a rotating ring, a first trapezoidal groove is provided in the threaded rod, and a push rod is fixed on the bottom inner wall of the rectangular groove; when the lifting rod moves downward, the push rod disengages from the first trapezoidal groove, and the rubber clamp clamps and fixes the arc extinguishing chamber under the action of the second tension spring, and the rotation of the nut block can control the stretching degree of the second tension spring to control the clamping force of the rubber clamp on the arc extinguishing chamber, and when the lifting rod moves upward and resets, the cooperation of the push rod and the first trapezoidal groove drives the rubber clamp to move outward, releases the clamping of the arc extinguishing chamber, and facilitates the replacement of the arc extinguishing chamber at a later time; In the present invention, the ends of the two trapezoidal rods that are away from each other are fixedly connected to the push block through a sliding bar, and pin rods are fixed in the two inclined grooves. The bottom inner wall of the shell is slidably connected to a V-shaped rod, and two pin rods are connected in the V-shaped rod through two sliding connections. The top of the V-shaped rod is rotatably connected to one of the lifting rods through a connecting rod; the cover plate pushes the two lifting rods to move downward, and one of the lifting rods cooperates with the connecting rod to drive the push plate and the V-shaped rod to move, and the V-shaped rod drives the two push blocks and the trapezoidal rod to move toward the middle through the cooperation of the track groove and the pin rod, and the trapezoidal rod extends into the second trapezoidal groove. The cooperation of the trapezoidal rod and the second trapezoidal groove can tightly fix the moving contact of the arc extinguishing chamber in the moving conductive rod; In the present invention, the adjustment structure includes a lifting touch plate sliding in the circuit breaker body, a screw rod is rotatably connected between the two second fixed blocks, the outer wall of the screw rod is fixedly sleeved with a first bevel gear, one end of the rotating rod is fixed with a second bevel gear meshing with the first bevel gear, a plurality of the moving conductive rods are fixedly connected to the vertical plate through an insulating rod, and a cam is rotatably connected to the circuit breaker body through a rotating shaft; the lifting touch plate is driven to rise and fall through the cooperation of the second bevel gear and the first bevel gear, and then the lifting touch plate is pushed downward by the rotation of the handle and the rotating shaft, so that the stroke of the moving conductive rod can be controlled, and in addition, the laser sensor detects the lifting distance of the lifting touch plate in real time, so that the stroke of the moving conductive rod can be calibrated by controlling the adjustment distance of the lifting touch plate, and the operation is simple and accurate.

[0017] In the present invention, the lifting and lowering of the lifting rod is controlled by the cover plate, so that the installation and disassembly of the arc extinguishing chamber can be completed synchronously. The operation is simple, and the connection stability of the moving and static contacts at both ends of the arc extinguishing chamber can be guaranteed during the installation process. In addition, the lifting and lowering of the lifting touch plate is controlled by the cooperation of the rotating rod and the screw rod. The lifting distance of the lifting touch plate is controlled in real time with the cooperation of the laser sensor, and the stroke of the moving conductive rod can be easily and accurately adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural schematic diagram of a vacuum interrupter replacement mechanism for a primary-secondary fusion column mounted circuit breaker provided by the present invention; Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a shell of a vacuum interrupter replacement mechanism for a primary-secondary fusion column-mounted circuit breaker provided by the present invention; Figure 3 A schematic diagram of a three-dimensional exploded structure of an arc extinguishing chamber, a threaded rod and a movable conductive rod of a vacuum arc extinguishing chamber replacement mechanism of a primary-secondary fusion column mounted circuit breaker provided by the present invention; Figure 4 A schematic three-dimensional cross-sectional structure diagram of a cover plate and a circular ring of a vacuum interrupter replacement mechanism for a primary-secondary fusion column mounted circuit breaker provided by the present invention; Figure 5 A schematic diagram of a three-dimensional exploded cross-sectional structure of a lifting rod, a threaded rod and a rubber clamping plate of a vacuum interrupter replacement mechanism of a primary and secondary fusion column mounted circuit breaker provided by the present invention; Figure 6 A schematic diagram of a three-dimensional exploded structure of a push block, a V-shaped rod and a trapezoidal rod of a vacuum interrupter replacement mechanism of a primary-secondary fusion column mounted circuit breaker provided by the present invention; Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a circuit breaker body of a calibration structure provided by the present invention; Figure 8 A schematic diagram of a three-dimensional exploded structure of a circuit breaker body and a lifting rod of the calibration structure provided by the present invention; Fig. 9 This is a schematic diagram of the three-dimensional exploded structure of the moving conductive rod, vertical plate and rotating rod of the calibration structure provided by the present invention.

[0019] In the figure: 1, circuit breaker body; 2, housing; 3, cover plate; 4, pad; 5, limit plate; 6, arc extinguishing chamber; 7, ring; 8, contact piece; 9, static conductive rod; 10, first tension spring; 11, insulating plate; 12, bellows; 13, positioning groove; 14, dynamic conductive rod; 15, threaded rod; 16, nut block; 17, rotating ring; 18, second tension spring; 19, rubber clamp; 20, rectangular groove; 21, top rod; 22, first trapezoidal groove; 23, first guide rod; 24, spring; 25, push plate; 26, connecting rod; 27, V-shaped rod; 28, track groove; 2 9. Pin rod; 30. Push block; 31. Bevel groove; 32. Sliding bar; 33. Third tension spring; 34. First fixed block; 35. Trapezoidal rod; 36. Second trapezoidal groove; 37. Insulating rod; 38. Vertical plate; 39. Second guide rod; 40. Fourth tension spring; 41. Second fixed block; 42. Screw rod; 43. First bevel gear; 44. Rotating rod; 45. Second bevel gear; 46. Give way groove; 47. Rotating shaft; 48. Cam; 49. Handle; 50. Limit block; 51. Laser sensor; 52. Lifting touch plate; 53. Lifting rod; 54. Closing plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1: Reference Figure 1-Figure 3 The invention discloses a replacement mechanism, which relates to the technical field of circuit breakers, and includes a circuit breaker body 1. A plurality of housings 2 are fixed on the top of the circuit breaker body 1, and the interior of these housings 2 is designed to be used for placing arc extinguishing chambers 6. At the same time, a plurality of movable conductive rods 14 are slidably penetrated on the top of the circuit breaker body 1, and these movable conductive rods 14 extend into the corresponding housings 2.

[0022] Reference Figure 2 Two lifting rods 53 are slidably arranged on the inner walls of the housing 2 on both sides away from each other. A cover plate 3 is detachably fixed to the top of the housing 2 by bolts. The main function of the cover plate 3 is to press the two lifting rods 53 downward during installation. Rubber clamps 19 are arranged on the sides where the two lifting rods 53 are close to each other, which are used to clamp the arc extinguishing chamber 6.

[0023] Reference Figure 2 and Figure 4 At the bottom of the cover plate 3, a circular ring 7 is fixed, and a contact piece 8 is slidably connected inside the circular ring 7. The static contact of the arc extinguishing chamber 6 extends into the circular ring 7 and contacts the bottom of the contact piece 8. A static conductive rod 9 is fixed to the top of the contact piece 8 and slides through the cover plate 3. On the outer wall of the static conductive rod 9, an insulating plate 11 located above the cover plate 3 is fixedly provided. A first tension spring 10 is fixed between the bottom of the insulating plate 11 and the top of the cover plate 3, and the first tension spring 10 is sleeved on the outer wall of the static conductive rod 9. Through the tension of the first tension spring 10, it can be ensured that the contact piece 8 fits tightly to the top of the static contact, thereby ensuring the stability of the connection between the static conductive rod 9 and the arc extinguishing chamber 6.

[0024] Specifically, the cover plate 3 is first installed on the top of the housing 2 by bolts. In the process of tightening the bolts, the cover plate 3 will move down and cling to the top of the housing 2. At this time, the contact piece 8 will cling to the top of the static contact of the arc extinguishing chamber 6 under the tension of the first tension spring 10, thereby ensuring the stability of the connection between the static conductive rod 9 and the arc extinguishing chamber 6.

[0025] Reference Figure 4 In addition, a bellows 12 is fixed between the bottom of the insulating plate 11 and the top of the cover plate 3. The bellows 12 is located on the outer wall of the static conductive rod 9 and is used to protect the static conductive rod 9. The bellows 12 is also located in the first tension spring 10. This design not only ensures the safety of the static conductive rod 9, but also makes the entire mechanism have better flexibility and adaptability during operation.

[0026] Reference Figure 2 , Figure 3 and Figure 5 In order to achieve the clamping of the arc extinguishing chamber 6 by the rubber clamping plate 19, a clamping structure is provided between the housing 2 and the lifting rod 53 in this embodiment. Specifically, the clamping structure includes a threaded rod 15 fixed to the side of the rubber clamping plate 19 away from the arc extinguishing chamber 6, and one end of the threaded rod 15 slides through the housing 2 and extends to one side of the housing 2. In addition, a rectangular groove 20 is provided in the lifting rod 53, and one end of the threaded rod 15 penetrates the rectangular groove 20. On the outer wall of the threaded rod 15, a nut block 16 is threadedly sleeved, and the nut block 16 is located on one side of the housing 2. A rotating ring 17 is rotatably connected to the side of the nut block 16 close to the housing 2, and a second tension spring 18 is fixed between the rotating ring 17 and the housing 2, and the second tension spring 18 is sleeved on the outer wall of the threaded rod 15. Through the cooperation of the threaded rod 15 and the nut block 16, the tensile strength of the second tension spring 18 can be controlled, thereby adjusting the clamping strength of the rubber clamping plate 19 on the arc extinguishing chamber 6. A first trapezoidal groove 22 located in the shell 2 is provided in the threaded rod 15. At the same time, a push rod 21 is fixed on the bottom inner wall of the rectangular groove 20, and the top end of the push rod 21 cooperates with the first trapezoidal groove 22. When the lifting rod 53 moves upward, the push rod 21 will drive the threaded rod 15 to move, thereby releasing the clamping of the rubber clamp 19 on the arc extinguishing chamber 6. In order to ensure that the lifting rod 53 can be stably moved up and reset, two first guide rods 23 are fixed on the bottom inner wall of the shell 2 in this embodiment, and the top ends of the two first guide rods 23 slide and extend into the corresponding lifting rods 53 respectively. At the same time, a spring 24 is also fixed between the bottom inner wall of the shell 2 and the bottom end of the lifting rod 53, and the spring 24 is sleeved on the outer wall of the first guide rod 23. The elastic force of the spring 24 is designed to be greater than the tension of the second tension spring 18 to ensure that the lifting rod 53 can be smoothly moved up and reset.

[0027] Specifically, the lifting rod 53 will move downward under the squeezing action of the cover plate 3. In this process, the top rod 21 will move downward and disengage from the first trapezoidal groove 22. At this time, the threaded rod 15 and the rubber clamp 19 will move toward the middle after losing the obstruction of the top rod 21, and the two rubber clamps 19 clamp and fix the arc extinguishing chamber 6 from both sides. If it is necessary to adjust the clamping force of the rubber clamp 19 on the arc extinguishing chamber 6, the nut block 16 can be driven to move outward by rotating the nut block 16, thereby stretching the second tension spring 18.

[0028] Specifically, when the arc extinguishing chamber 6 needs to be replaced, the cover plate 3 can be removed from the housing 2 first. At this time, the lifting rod 53 will move up and reset under the action of the spring 24. In this process, the top rod 21 will cooperate with the first trapezoidal groove 22 to drive the threaded rod 15 and the rubber clamping plate 19 to move outward, thereby releasing the clamping of the arc extinguishing chamber 6. Then, the old arc extinguishing chamber 6 can be easily taken out and replaced with a new arc extinguishing chamber 6. Finally, the cover plate 3 can be reinstalled according to the reverse steps and the clamping force of the rubber clamping plate 19 can be adjusted.

[0029] In addition, the present embodiment further includes two trapezoidal rods 35 that slide through the movable conductive rod 14. The movable contact of the arc extinguishing chamber 6 extends into the movable conductive rod 14. A fixed connection structure is provided in the housing 2 for driving the trapezoidal rod 35 to be inserted into the second trapezoidal groove 36, thereby completing the fixation between the movable conductive rod 14 and the movable contact.

[0030] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 The fixed connection structure includes two push blocks 30 slidably arranged on the bottom inner wall of the shell 2, and the two push blocks 30 are symmetrically located on both sides of the moving conductive rod 14. A bevel groove 31 is provided on one side of each push block 30, and a pin rod 29 is fixed in the bevel groove 31. A sliding bar 32 is fixed at the end of the trapezoidal rod 35 that is away from each other, and the sliding bar 32 is slidably connected with the corresponding push block 30. On the side where the push blocks 30 are close to each other, a first fixed block 34 is fixed, and a third tension spring 33 is connected between the bottom of the first fixed block 34 and the top of the sliding bar 32. This design enables the push block 30 to slide along the sliding bar 32 when subjected to external force, and reset under the action of the third tension spring 33. A V-shaped rod 27 is also slidably connected to the bottom inner wall of the shell 2, and the two ends of the V-shaped rod 27 slide through the two bevel grooves 31 respectively, and a track groove 28 is provided inside it. The pin rod 29 is slidably arranged in the corresponding track groove 28, so that when the V-shaped rod 27 moves, the cooperation between the track groove 28 and the pin rod 29 can drive the two push blocks 30 to move toward each other. A push plate 25 is fixed on the top of the V-shaped rod 27, and a connecting rod 26 is rotatably connected to the side of the push plate 25 away from the moving conductive rod 14, and the top end of the connecting rod 26 is rotatably connected to one side of the adjacent lifting rod 53.

[0031] Specifically, when the cover plate 3 pushes the lifting rods 53 to move downward, one of the lifting rods 53 cooperates with the connecting rod 26 to drive the push plate 25 and the V-shaped rod 27 to move. The movement of the V-shaped rod 27 further drives the two push blocks 30 to move toward the middle through the cooperation of the track groove 28 and the pin rod 29. The movement of the push block 30 will drive the trapezoidal rod 35 connected thereto to move toward the middle. Second trapezoidal grooves 36 are provided on both sides of the moving contact of the arc extinguishing chamber 6, and the second trapezoidal grooves 36 are located in the moving conductive rod 14. The trapezoidal rod 35 cooperates with the second trapezoidal groove 36. When the trapezoidal rod 35 extends into the second trapezoidal groove 36, the moving contact of the arc extinguishing chamber 6 can be tightly fixed in the moving conductive rod 14, so that it moves downward and fits tightly against the bottom inner wall of the moving conductive rod 14.

[0032] Reference Figure 4 Two positioning grooves 13 are provided at the bottom of the cover plate 3 , and the top end of the lifting rod 53 extends into the corresponding positioning groove 13 for positioning the lifting rod 53 .

[0033] Reference Figure 2 and Figure 3 , multiple limit plates 5 are precisely arranged inside the shell 2, and these limit plates 5 form a stable support structure inside the shell. A pad 4 is placed on the top of the two limit plates 5, and the pad 4 is designed to slide smoothly inside the shell 2. The moving contact of the arc extinguishing chamber 6 cleverly passes through the pad 4. This design allows the pad 4 and the limit plate 5 to work closely together and jointly assume the task of firmly supporting the arc extinguishing chamber 6. When replacing the arc extinguishing chamber, the sliding property of the pad 4 can facilitate the accurate positioning and easy removal of the arc extinguishing chamber, greatly improving the replacement efficiency.

[0034] Through the arrangement of the above structure and the realization of the working principle, the vacuum interrupter replacement mechanism of the primary and secondary fusion column-mounted circuit breaker provided in this embodiment can conveniently, quickly and safely replace the interrupter 6, greatly improving the maintenance efficiency and reliability of the circuit breaker. During the operation, the trapezoidal rod 35 can clamp and fix the moving contact only by pushing the cover plate 3, thereby completing the replacement of the interrupter. The whole process is simple, efficient and easy to operate.

[0035] The method for using the vacuum interrupter replacement mechanism of the primary and secondary fusion column mounted circuit breaker comprises the following steps: S1. During replacement and installation, the arc extinguishing chamber 6 is placed into the housing 2. The moving contact of the arc extinguishing chamber 6 passes through the pad 4 and extends into the moving conductive rod 14. The second trapezoidal groove 36 corresponds to the trapezoidal rod 35. Then, the cover plate 3 is installed on the top of the housing 2 by means of bolts. During the process of tightening the bolts, the cover plate 3 moves down and is close to the top of the housing 2. The cover plate 3 pushes the two lifting rods 53 to move down. One of the lifting rods 53 cooperates with the connecting rod 26 to drive the push plate 25 and the V-shaped rod 27 to move. The V-shaped rod 27 drives the two pushing blocks 30 and the trapezoidal rod 35 to move toward the middle through the cooperation of the track groove 28 and the pin rod 29. The trapezoidal rod 35 extends into the second trapezoidal groove 36. The cooperation of the trapezoidal rod 35 and the second trapezoidal groove 36 can tightly fix the moving contact of the arc extinguishing chamber 6 in the moving conductive rod 14. S2. In addition, when the lifting rod 53 moves downward, the top rod 21 moves downward and its top end disengages from the first trapezoidal groove 22. The threaded rod 15 and the rubber clamp 19 move toward the middle after losing the obstruction of the top rod 21, and the two rubber clamps 19 clamp and fix the arc extinguishing chamber 6 from both sides; in addition, by rotating the nut block 16, the nut block 16 is driven to move outward, so that the second tension spring 18 can be stretched to control the clamping force of the rubber clamp 19 on the arc extinguishing chamber 6; on the contrary, when the cover plate 3 is removed from the housing 2, the lifting rod 53 moves upward and resets under the action of the spring 24, and the cooperation of the top rod 21 and the first trapezoidal groove 22 drives the threaded rod 15 and the rubber clamp 19 to move outward, thereby releasing the clamping of the arc extinguishing chamber 6, which is convenient for the later replacement of the arc extinguishing chamber 6; S3. When the cover plate 3 closes the top of the shell 2, the contact piece 8 is tightly attached to the top of the static contact of the arc extinguishing chamber 6 under the tension of the first tension spring 10, ensuring the stability of the connection between the static conductive rod 9 and the arc extinguishing chamber 6, and the external cable is connected to the static conductive rod 9.

[0036] Reference Figure 7 and Fig. 9 , a calibration structure for calibrating the stroke of the moving conductive rod in the vacuum interrupter replacement mechanism of the above-mentioned primary and secondary fusion column circuit breaker, including a plurality of second guide rods 39 firmly fixed on the top inner wall of the circuit breaker body 1. A vertical plate 38 is slidably sleeved on the outer wall of these second guide rods 39, and the top of the vertical plate 38 and the top inner wall of the circuit breaker body 1 are tightly connected through a plurality of fourth tension springs 40, which are tightly sleeved on the outer wall of the second guide rod 39 to provide stable elastic support for the vertical plate 38. A rotating shaft 47 is rotatably connected in the circuit breaker body 1, and a cam 48 is fixedly sleeved on the outer wall of the rotating shaft 47, and the contour design of the cam 48 is used to accurately control the stroke of the moving conductive rod 14.

[0037] Reference Figure 7 and Fig. 9 In order to achieve fine adjustment of the stroke of the moving conductive rod 14, an adjustment structure is cleverly provided in the circuit breaker body 1. The adjustment structure includes a lifting touch plate 52 sliding in the circuit breaker body 1, and the lifting touch plate 52 is precisely located below the cam 48. Two second fixed blocks 41 arranged up and down are fixed on the side of the vertical plate 38 close to the lifting touch plate 52. Between the two second fixed blocks 41, a screw rod 42 is rotatably connected, and the screw rod 42 cleverly threads through the lifting touch plate 52, so that the rotation of the screw rod can directly drive the lifting and lowering of the lifting touch plate. A first bevel gear 43 is provided on the outer wall fixed sleeve of the screw rod 42 for transmitting rotational power. A rotating rod 44 is rotatably connected to the bottom of the second fixed block 41 located at the top through a base plate. A second bevel gear 45 tightly meshed with the first bevel gear 43 is fixed at one end of the rotating rod 44. Such a design enables the rotation of the rotating rod 44 to drive the rotation of the screw rod 42. The end of the rotating rod 44 away from the second bevel gear 45 extends to one side of the circuit breaker body 1, which is convenient for the operator to manually adjust. Insulating rods 37 are fixedly passed through the multiple moving conductive rods 14, and one end of these insulating rods 37 is fixedly connected to the vertical plate 38 to ensure the synchronous movement of the moving conductive rod 14 and the vertical plate 38. A laser sensor 51 is also fixed to the bottom inner wall of the circuit breaker body 1, which is used to detect the lifting distance of the lifting touch plate 52 in real time, and provide data support for the precise calibration of the travel of the moving conductive rod 14.

[0038] Specifically, the operator drives the second bevel gear 45 to rotate by rotating the rotating rod 44, and the second bevel gear 45 is tightly meshed with the first bevel gear 43, thereby driving the screw 42 to rotate. The rotation of the screw 42 drives the lifting touch plate 52 to rise and fall, thereby accurately controlling the distance between the lifting touch plate 52 and the rotating shaft 47. Then, the operator manually turns the handle 49 to rotate the rotating shaft 47 90°. At this time, the protruding part of the cam 48 cleverly pushes the lifting touch plate 52 downward, thereby accurately controlling the stroke of the moving conductive rod 14. At the same time, the laser sensor 51 detects the lifting distance of the lifting touch plate 52 in real time, providing accurate feedback to the operator, ensuring that the calibration of the stroke of the moving conductive rod 14 is both simple and accurate.

[0039] Reference Figure 8 and Fig. 9 The rotating shaft 47 is designed to have one end that can rotate through the circuit breaker body 1 and extend to one side of the circuit breaker body 1. A handle 49 is fixed to the rotating shaft 47 at this end. The handle 49 provides a convenient operation point so that the user or maintenance personnel can manually rotate the handle 49 to drive the cam 48 to rotate. The cam 48 serves as a transmission mechanism, and its rotation will further drive other components to move to achieve the purpose of calibration or adjustment. A limit block 50 is fixed to one side of the circuit breaker body 1, and the limit block 50 limits the handle 49.

[0040] In summary, through the coordinated design of the rotating shaft 47, the handle 49, the limit block 50, the clearance groove 46, the rotating rod 44 and the closing plate 54, not only the convenient operation of the calibration structure is achieved, but also the sealing of the circuit breaker body 1 and the cleanliness of the internal environment are effectively guaranteed, thereby improving the reliability and service life of the entire equipment.

[0041] Example 2: Reference Figure 8 A clearance groove 46 is provided on one side of the circuit breaker body 1, and the clearance groove 46 is designed to allow one end of the rotating rod 44 to pass through it. In order to maintain the sealing of the circuit breaker body 1 and prevent foreign matter such as dust and insects from entering the interior, a closing plate 54 is rotatably sleeved on the outer wall of the rotating rod 44. The closing plate 54 can not only move with the rotating rod 44 when it rotates, but also is designed to slide on one side of the circuit breaker body 1, ensuring that the clearance groove 46 can be closed at any time.

[0042] The method of using the calibration structure comprises the following steps: When it is necessary to adjust the stroke of the moving conductive rod 14 and the moving contact of the arc extinguishing chamber 6, the second bevel gear 45 is driven to rotate by the rotating rod 44, and the second bevel gear 45 is engaged with the first bevel gear 43 to drive the screw rod 42 to rotate, thereby driving the lifting touch plate 52 to rise and fall, and controlling the distance between the lifting touch plate 52 and the rotating shaft 47. Then, the handle 49 and the rotating shaft 47 are manually turned 90°, and the protruding part of the cam 48 pushes the lifting touch plate 52 downward, thereby controlling the stroke of the moving conductive rod 14. In addition, the laser sensor 51 detects the lifting distance of the lifting touch plate 52 in real time, and then can complete the calibration of the stroke of the moving conductive rod 14 by controlling the adjustment distance of the lifting touch plate 52. The operation is simple and accurate.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum interrupter replacement mechanism for a primary and secondary fusion column mounted circuit breaker, characterized in that: It comprises a circuit breaker body (1), a plurality of shells (2) being fixed on the top of the circuit breaker body (1), an arc extinguishing chamber (6) being placed inside the shell (2), and a plurality of movable conductive rods (14) extending into the shell (2) being slidably penetrated through the top of the circuit breaker body (1); It also includes two lifting rods (53) sliding on the inner walls of the housing (2) at two sides away from each other, the top of the housing (2) being detachably fixed with a cover plate (3) by bolts, the two lifting rods (53) being provided with a rubber clamping plate (19) on the sides close to each other, a clamping structure for driving the rubber clamping plate (19) to move and clamp the arc extinguishing chamber (6) is provided between the housing (2) and the lifting rods (53), the clamping structure including a threaded rod (15) fixed on the side of the rubber clamping plate (19) away from the arc extinguishing chamber (6), and one end of the threaded rod (15) slidingly passing through the housing (2) and extending to one side of the housing (2); It also includes two trapezoidal rods (35) that slide through the moving conductive rod (14), the moving contact of the arc extinguishing chamber (6) extends into the moving conductive rod (14), and a fixed connection is provided in the housing (2) for driving the trapezoidal rod (35) to insert into the second trapezoidal groove (36) to complete the fixation between the moving conductive rod (14) and the moving contact.

2. The vacuum interrupter replacement mechanism for the primary and secondary fusion column mounted circuit breaker according to claim 1, characterized in that: A circular ring (7) is fixed at the bottom of the cover plate (3), a contact piece (8) is slidably connected inside the circular ring (7), a static contact of the arc extinguishing chamber (6) extends into the circular ring (7) and contacts the bottom of the contact piece (8), a static conductive rod (9) is fixed at the top of the contact piece (8) and slides through the cover plate (3), an insulating plate (11) located above the cover plate (3) is fixedly sleeved on the outer wall of the static conductive rod (9), a first tension spring (10) is fixed between the bottom of the insulating plate (11) and the top of the cover plate (3), and the first tension spring (10) is sleeved on the outer wall of the static conductive rod (9) to make the contact piece (8) fit tightly against the top of the static contact.

3. The vacuum interrupter replacement mechanism for the primary and secondary fusion column mounted circuit breaker according to claim 2, characterized in that: The clamping structure also includes a rectangular groove (20) arranged in the lifting rod (53), and one end of the threaded rod (15) passes through the rectangular groove (20), the outer wall of the threaded rod (15) is threadedly sleeved with a nut block (16), and the nut block (16) is located on one side of the shell (2), and the nut block (16) is rotatably connected to a rotating ring (17) on the side close to the shell (2), a second tension spring (18) is fixed between the rotating ring (17) and the shell (2), and the second tension spring (18) is sleeved on the outer wall of the threaded rod (15), and the threaded rod (15) and the nut block (16) cooperate to control the tensile strength of the second tension spring (18), and the threaded rod (15) is provided with a first trapezoidal groove (22) located in the shell (2). A push rod (21) is fixed to the bottom inner wall of the rectangular groove (20), and the top end of the push rod (21) cooperates with the first trapezoidal groove (22). When the lifting rod (53) moves upward, the threaded rod (15) is driven to move to release the clamping of the rubber clamp (19) on the arc extinguishing chamber (6). Two first guide rods (23) are fixed to the bottom inner wall of the shell (2). The top ends of the two first guide rods (23) slide and extend into the corresponding lifting rods (53) respectively. A spring (24) is fixed between the bottom inner wall of the shell (2) and the bottom end of the lifting rod (53). The spring (24) is sleeved on the outer wall of the first guide rod (23) and is used to drive the lifting rod (53) to move upward and reset. The elastic force of the spring (24) is greater than the tension of the second tension spring (18).

4. The vacuum interrupter replacement mechanism for the primary and secondary fusion column mounted circuit breaker according to claim 3 is characterized in that: The fixed connection comprises two push blocks (30) sliding on the inner wall of the bottom of the shell (2), the two push blocks (30) being located on both sides of the moving conductive rod (14), the ends of the two trapezoidal rods (35) being away from each other are fixed with a sliding bar (32), the two sliding bars (32) being slidably connected with the corresponding push blocks (30), the sides of the two push blocks (30) being close to each other are fixed with a first fixed block (34), the bottoms of the two first fixed blocks (34) and the tops of the corresponding sliding bars (32) are fixed with a third tension spring (33), one side of the two push blocks (30) is provided with an inclined groove (31), the two inclined grooves (31) are fixed with a pin rod (29), the inner wall of the bottom of the shell (2) is slidably connected with a V-shaped rod (27), the two ends of the V-shaped rod (27) respectively slide through the two inclined grooves (31), and the two ends of the V-shaped rod (27) respectively slide through the two inclined grooves (31). The V-shaped rod (27) has two track grooves (28) in it, and the two pin rods (29) are respectively slidably arranged in the corresponding track grooves (28). The V-shaped rod (27) is used to drive the two push blocks (30) to move towards each other through the cooperation of the track grooves (28) and the pin rods (29). A push plate (25) is fixed on the top of the V-shaped rod (27). The side of the push plate (25) away from the moving conductive rod (14) is rotatably connected to a connecting rod (26). The top of the connecting rod (26) is rotatably connected to one side of an adjacent lifting rod (53). The lifting rod (53) drives the V-shaped rod (27) to move through the connecting rod (26). Second trapezoidal grooves (36) are provided on both sides of the moving contact of the arc extinguishing chamber (6), and the second trapezoidal grooves (36) are located in the moving conductive rod (14). The trapezoidal rod (35) cooperates with the second trapezoidal grooves (36).

5. The vacuum interrupter replacement mechanism for the primary and secondary fusion column mounted circuit breaker according to claim 4, characterized in that: Two positioning grooves (13) are provided at the bottom of the cover plate (3), and the top ends of the two lifting rods (53) extend into the corresponding positioning grooves (13) for positioning the lifting rods (53). A bellows (12) is fixed between the bottom of the insulating plate (11) and the top of the cover plate (3), and the bellows (12) is located on the outer wall of the static conductive rod (9) for protecting the static conductive rod (9). The bellows (12) is located in the first tension spring (10).

6. The vacuum interrupter replacement mechanism for the primary and secondary fusion column mounted circuit breaker according to claim 5, characterized in that: A plurality of limit plates (5) are fixed in the housing (2); a same pad (4) is placed on top of two of the limit plates (5); the pad (4) is slidably arranged in the housing (2); a moving contact of the arc extinguishing chamber (6) passes through the pad (4); and the pad (4) cooperates with the limit plates (5) to support the arc extinguishing chamber (6).

7. A calibration structure for calibrating the stroke of the moving conductive rod (14) in the vacuum interrupter replacement mechanism of the primary and secondary fusion column mounted circuit breaker according to claim 6, characterized in that: The invention comprises a plurality of second guide rods (39) fixed to the inner wall of the top of the circuit breaker body (1); the outer walls of the plurality of second guide rods (39) are slidably sleeved with a same vertical plate (38); a plurality of fourth tension springs (40) are fixed between the top of the vertical plate (38) and the inner wall of the top of the circuit breaker body (1); and the fourth tension springs (40) are sleeved on the outer walls of the second guide rods (39); a rotating shaft (47) is rotatably connected inside the circuit breaker body (1); a cam (48) is fixedly sleeved on the outer wall of the rotating shaft (47); and an adjustment structure for adjusting the stroke of a movable conductive rod (14) is provided inside the circuit breaker body (1).

8. The calibration structure according to claim 7, characterized in that: The adjustment structure comprises a lifting touch plate (52) sliding in the circuit breaker body (1), and the lifting touch plate (52) is located below the cam (48); two second fixed blocks (41) arranged up and down are fixed on one side of the vertical plate (38) close to the lifting touch plate (52); a screw rod (42) is rotatably connected between the two second fixed blocks (41), and the screw rod (42) is threadedly penetrated through the lifting touch plate (52); a first bevel gear (43) is fixedly sleeved on the outer wall of the screw rod (42); and the bottom of the second fixed block (41) located at the top is connected to the lifting touch plate (52) through a base plate. A rotating rod (44) is rotatably connected, a second bevel gear (45) meshing with the first bevel gear (43) is fixed to one end of the rotating rod (44), an end of the rotating rod (44) away from the second bevel gear (45) extends to one side of the circuit breaker body (1), multiple moving conductive rods (14) are fixedly penetrated by insulating rods (37), one end of the multiple insulating rods (37) is fixedly connected to the vertical plate (38), and a laser sensor (51) for detecting the lifting distance of the lifting touch plate (52) is fixed to the bottom inner wall of the circuit breaker body (1).

9. The calibration structure according to claim 8, characterized in that: One end of the rotating shaft (47) rotates through the circuit breaker body (1) and extends to one side of the circuit breaker body (1); a handle (49) is fixed to one end of the rotating shaft (47) for driving the cam (48) to rotate; and a limit block (50) for limiting the handle (49) is fixed to one side of the circuit breaker body (1).

10. The calibration structure according to claim 9, characterized in that: A clearance groove (46) is provided on one side of the circuit breaker body (1), one end of the rotating rod (44) passes through the clearance groove (46), a closing plate (54) is rotatably sleeved on the outer wall of the rotating rod (44), and the closing plate (54) slides on one side of the circuit breaker body (1) to close the clearance groove (46).

Images