Gas insulation contact pressure adjustable vacuum circuit breaker

Abstract

The invention relates to the technical field of vacuum circuit breakers, in particular to a gas insulation contact pressure adjustable vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber, a shell, a static contact and a moving contact, and is characterized in that the vacuum arc-extinguishing chamber is fixedly connected to the shell, the static contact is fixedly connected to the vacuum arc-extinguishing chamber, and the moving contact is slidably connected to the vacuum arc-extinguishing chamber; one end of the moving contact is fixedly connected with a first connecting rod, the first connecting rod is rotatably connected to the interior of the shell, one end of the first connecting rod is further rotatably connected with a second connecting rod, one end of the second connecting rod is rotatably connected with a rotating disc, the rotating disc is rotatably connected to the interior of the shell, and the shell is further provided with an opening and closing mechanism. The detection assembly enables the moving contact to be incapable of opening when the opening speed is insufficient, thereby avoiding the problem that the moving contact and the static contact are damaged due to the fact that an electric arc is liable to occur between the moving contact and the static contact due to the insufficient opening speed, and improving the safety of a worker during opening.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum circuit breakers, in particular to a gas-insulated contact pressure-adjustable vacuum circuit breaker. Background Art

[0002] Gas-insulated contact pressure adjustable vacuum circuit breaker is a common switchgear in power systems. It has the advantages of strong breaking capacity and good arc extinguishing performance. The arc extinguishing chamber is an important component of the vacuum circuit breaker, and its normal operation is crucial to the overall performance of the equipment.

[0003] Gas-insulated contact pressure adjustable vacuum circuit breakers require fast opening, and the opening speed of the vacuum circuit breaker is usually required to be as fast as possible, because fast opening helps to disconnect the fault circuit within a few milliseconds before the current approaches zero, thereby shortening the arc existence time, reducing electrical wear on the contact surface, and reducing the risk of arc restrike. In gas-insulated contact pressure adjustable vacuum circuit breakers, fast opening is generally achieved through an opening spring. However, the elasticity of the opening spring gradually decreases during long-term use. The decrease in the elasticity of the spring cannot guarantee the opening speed of the gas-insulated contact pressure adjustable vacuum circuit breaker, resulting in an arc easily occurring between the moving contact and the static contact, thereby increasing the wear of the moving contact and the static contact, and even causing damage to the moving contact and the static contact.

[0004] In view of the above problems, the prior art provides some solutions. For example, patent application number: CN202320503726.1 provides a vacuum circuit breaker with a fast opening and closing speed. The vacuum circuit breaker with a fast opening and closing speed is provided with a friction ring and a spring inside the buffer sealing block. When the moving conductive rod with large kinetic energy contacts the static contact, the static contact will compress the spring and slide while contacting the moving conductive rod. At the same time, the friction force between the friction ring and the buffer sealing block effectively slows down the sliding speed of the static contact, preventing the static contact from sliding too fast after contacting the moving conductive rod, causing the two to lose contact. This can not only ensure the stable contact between the moving and static contacts, but also effectively alleviate the impact between the moving and static contacts. The impact intensity is that after the moving conductive rod slides outward and loses contact with the static contact, the compressed spring will push the static contact back to its original position. At the same time, the friction between the friction ring and the buffer sealing block will reduce the return speed of the static contact, causing the moving and static contacts to separate quickly. Although this scheme ensures the opening speed, the setting will also wear and age due to long-term use, which will affect the opening and closing speed of the fast vacuum circuit breaker. In addition, since the internal structure of the vacuum circuit breaker cannot be observed, the use of the opening spring cannot be known, which makes it impossible to adjust the opening spring in time, resulting in adjustment only after an abnormality occurs during the opening process, which in turn causes damage to the vacuum circuit breaker. Summary of the invention

[0005] The object of the present invention is to provide a gas-insulated contact pressure adjustable vacuum circuit breaker to solve the problem that the elasticity of the opening spring gradually decreases during long-term use. The decrease in the elasticity of the spring cannot ensure the opening speed of the gas-insulated contact pressure adjustable vacuum circuit breaker, which makes it easy for an arc to occur between the moving contact and the stationary contact, thereby increasing the wear of the moving contact and the stationary contact, and even causing damage to the moving contact and the stationary contact.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas-insulated contact pressure-adjustable vacuum circuit breaker, comprising a vacuum interrupter, a housing, a static contact and a moving contact, wherein the vacuum interrupter is fixedly connected to the housing, the static contact is fixedly connected to the vacuum interrupter, the moving contact is slidably connected to the vacuum interrupter, one end of the moving contact is fixedly connected to a connecting rod 1, the connecting rod 1 is rotatably connected to the inside of the housing, one end of the connecting rod 1 is also rotatably connected to a connecting rod 2, one end of the connecting rod 2 is rotatably connected to a rotating disk, the inside of the housing is also rotatably connected to a rotating shaft, the rotating disk is fixedly connected to the rotating shaft, and a switch-on and switch-off mechanism is also provided on the housing, the switch-on and switch-off mechanism The mechanism is connected to the rotating shaft, and two mounting seats 1 are fixedly installed inside the shell. A detection component with a slider 1 is arranged inside the mounting seat 1, and the slider 1 is slidably connected inside the mounting seat 1. A disconnecting spring is also arranged inside the shell, and the two ends of the disconnecting spring are respectively fixedly connected to the connecting rod 1 and the slider 1. The detection component is also connected to the turntable, and an adjustment component is also arranged inside the shell. When the moving contact is in contact with the static contact and the length of the disconnecting spring is greater than the set value, the detection component limits the rotation of the turntable, and the adjustment component is used to adjust the length of the spring when the moving contact is in contact with the static contact.

[0008] It is easy to understand that when the elasticity of the opening spring inside the gas-insulated contact pressure adjustable vacuum circuit breaker decreases due to aging, the elasticity of the opening spring cannot guarantee the opening speed of the gas-insulated contact pressure adjustable vacuum circuit breaker when it is opened. The design is equipped with a detection component inside the gas-insulated contact pressure adjustable vacuum circuit breaker. When the elasticity of the opening spring decreases, the detection component limits the rotation of the rotating shaft. At this time, the gas-insulated contact pressure adjustable vacuum circuit breaker cannot perform the opening action. At this time, the staff can adjust the length of the opening spring by adjusting the component, thereby increasing the elasticity of the opening spring. At this time, the gas-insulated contact pressure adjustable vacuum circuit breaker can perform the opening action. This design makes it impossible for the gas-insulated contact pressure adjustable vacuum circuit breaker to open when the opening speed is insufficient, thereby avoiding the problem of arc between the moving contact and the static contact due to insufficient opening speed, thereby increasing the wear of the moving contact and the static contact, and even causing damage to the moving contact and the static contact. At the same time, it also improves the safety of the staff when opening the circuit, and the adjustment component increases the elasticity of the opening spring by adjusting the length of the opening spring, thereby ensuring the reliability of the gas-insulated contact pressure adjustable vacuum circuit breaker.

[0009] Preferably, the detection component includes a limit block, which is arranged inside the mounting seat one, the limit block contacts with the slider one, and the limit block limits the slider one to move downward, and the housing is also provided with a mounting seat two, the mounting seat two is slidably connected to the slider two, a rope is provided between the slider one and the slider two, the mounting seat one is also slidably connected to the locking block, a protrusion is fixedly connected on the turntable, a spring one is provided between the locking block and the mounting seat one, a control rod is hinged on the limit block, one end of the control rod extends to the inside of the mounting seat one and contacts with the slider one, the other end of the control rod is connected with the locking block, the locking block is provided with a sliding groove, one end of the control rod is fixedly installed with a round rod, the round rod is slidably connected to the inside of the sliding groove, the locking block is provided with a sliding groove, and one end of the control rod is fixedly installed with a round rod, and the round rod is slidably connected to the inside of the sliding groove.

[0010] It is easy to understand that when the elasticity of the opening spring decreases, the elasticity of the opening spring cannot guarantee the opening speed of the gas-insulated contact pressure adjustable vacuum circuit breaker. At this time, the elastic force of the spring cannot pull slider one, and slider one will be pulled by slider two. At this time, slider one moves upward, causing slider one to be unable to fully press the control rod, causing the locking block to move toward the outside of mounting seat one under the action of spring one. At this time, the locking block contacts the protrusion on the turntable and makes the turntable unable to rotate. This design uses the gravity of slider two to detect the opening spring, avoiding the use of other conventional structures to detect the opening spring. If the detection structure is worn, the tension on slider one will change, which will lead to inaccurate detection of the elasticity of the opening spring. Therefore, this design avoids the influence of wear, aging and other factors on the elasticity detection of the opening spring, and improves the reliability of the gas-insulated contact pressure adjustable vacuum circuit breaker.

[0011] Preferably, the adjusting assembly includes a connecting shaft, which is rotatably connected to the inside of the shell, and the limit block is slidably connected to the inside of the mounting seat. The limit block is provided with a rack, and two gears are rotatably and fixedly connected to the connecting shaft, and the two gears are respectively meshed with the racks on the two limit blocks. One end of the connecting shaft extends to the outside of the shell, and a handle is provided at one end of the connecting shaft. A locking tongue is also slidably connected to the inside of the shell, and a spring 2 is provided between the locking tongue and the shell. A ratchet is also fixedly connected to the connecting shaft, and when the connecting shaft rotates away from the mounting seat, the rack moves upward, and the locking tongue limits the ratchet from rotating toward the side of the mounting seat.

[0012] It is easy to understand that when the elasticity of the opening spring decreases, the elasticity of the opening spring cannot guarantee the opening speed of the gas-insulated contact pressure adjustable vacuum circuit breaker. At this time, the staff turns the handle, and the connecting shaft rotates, thereby driving the gear to rotate. At this time, the gear drives the rack to move, and the rack drives the limit block to move, so that the limit block squeezes the slider and the slider stretches the opening spring. This design fixes two gears on the same connecting shaft, so that the limit blocks on both sides can be controlled at the same time through one connecting shaft, so that the staff can adjust the opening springs on both sides at one time, thereby improving work efficiency.

[0013] Preferably, four buffer blocks are hinged inside the mounting seat 1, and a torsion spring is provided at the hinge between the buffer block and the mounting seat 1, and the torsion direction of the torsion spring is toward the inner side of the mounting seat 1.

[0014] It is easy to understand that when the gas-insulated contact pressure-adjustable vacuum circuit breaker is opened, the tension of the opening spring on slider 1 is reduced, and slider 1 will be pulled by slider 2. Slider 1 moves upward quickly, and slider 1 will hit mounting seat 1 to produce vibration, and may also cause wear on the inner wall of mounting seat 1, resulting in an increase in the friction coefficient between slider 1 and the inner wall of mounting seat 1, thereby affecting the detection accuracy of the detection component. The design has four buffer blocks hinged on mounting seat 1. When slider 1 moves upward, the buffer block is pressed. At this time, the buffer block applies pressure to slider 1 through the torsion spring, thereby buffering slider 1. Therefore, the design reduces the vibration of the gas-insulated contact pressure-adjustable vacuum circuit breaker when it is opened, and improves the reliability of the gas-insulated contact pressure-adjustable vacuum circuit breaker.

[0015] Preferably, the opening spring is fixedly connected to the middle part of the slider, and when the moving contact is in the opening state, the opening spring is perpendicular to the horizontal plane, and when the moving contact is in the closing state and the limit block moves to the maximum distance, there is a gap between the opening spring and the inner wall of the mounting seat.

[0016] It is easy to understand that when the moving contact is in the open state, the opening spring is perpendicular to the horizontal plane. Therefore, this arrangement can prevent the opening spring from contacting the inner wall of the mounting seat, thereby preventing the opening spring from contacting and wearing the inner wall of the mounting seat during stretching, thereby improving the service life of the opening spring. When the moving contact is in the closed state, the connecting rod will rotate around the outer shell and stretch the opening spring. At this time, the opening spring tilts toward the inner wall of the mounting seat. This design can ensure that there is a gap between the opening spring and the inner wall of the mounting seat after the opening spring tilts, thereby preventing the opening spring from contacting the inner wall of the mounting seat and causing wear, thereby further improving the service life of the opening spring.

[0017] Preferably, a rectangular groove is provided on the mounting seat 1, a rectangular block is fixedly connected to the locking block, ratchet 1 is provided on the rectangular block, and ratchet 2 is provided on the limit block. When the slider 1 contacts the limit block, the rectangular block passes through the rectangular groove and moves to the inner side of the mounting seat 1, and the ratchet 1 contacts the ratchet 2, and the ratchet 1 limits the movement of the limit block by contacting the ratchet 2.

[0018] It is easy to understand that when the staff adjusts the opening spring through the adjustment component, it is impossible to observe whether the control rod inside the shell is fully pressed into place, so the staff cannot accurately adjust the opening spring. At this time, if the adjustment is not in place, it will be necessary to adjust again, which reduces the work efficiency. If the adjustment is excessive, the opening spring will be over-stretched, thereby accelerating the aging of the opening spring. In addition, over-stretching the opening spring will make the opening speed too fast, resulting in increased vibration during opening, which is easy to cause damage to structures such as the moving contact and the connecting rod. Therefore, the design is fixed with a rectangular block on the locking block. When the staff adjusts the opening spring When the spring is adjusted, the limit block moves upward, and the slider 1 continuously presses the control rod, and the control rod moves the locking block. When the control rod is fully pressed into place, the rectangular block passes through the rectangular groove and contacts the limit block, and the ratchet 1 on the rectangular block contacts the ratchet 2 on the limit block, causing the limit block to be unable to move further and the staff to be unable to continue to adjust. At this time, the staff can know that the opening spring has been adjusted into place, so that the staff can easily adjust the opening spring into place. Therefore, this design not only ensures the work efficiency of the staff, but also avoids the opening spring from being over-stretched, thereby increasing the service life of the opening spring.

[0019] Preferably, wire grooves are fixedly connected on both sides of the second mounting seat, both sides and corners of the wire grooves are chamfered, and the ropes on both sides of the second mounting seat are slidably connected to the wire grooves.

[0020] It is easy to understand that when the gas-insulated contact pressure-adjustable vacuum circuit breaker is performing opening and closing actions, slider one and slider two will move back and forth, and the rope between slider one and slider two will constantly rub against the edges of mounting base one and mounting base two, thereby causing wear on the rope, resulting in a decrease in the service life of the rope. The design has wire grooves fixedly connected on both sides of mounting base two, and rounded corners are made on both sides and corners of the wire grooves, and the rope is slidably connected in the wire grooves. Therefore, when the rope moves back and forth, the wear of the rope is reduced due to the rounded corners on the wire grooves, thereby increasing the service life of the rope.

[0021] Preferably, a backup switch is provided on the housing, the backup switch is slidably connected to the housing, an unlocking rod is fixedly connected to the backup switch, the unlocking rod is in contact with the locking block, and when the backup switch is pressed, the unlocking rod causes the locking block to move.

[0022] It is easy to understand that when the elasticity of the opening spring decreases, the locking block will lock the turntable. At this time, the gas-insulated contact pressure adjustable vacuum circuit breaker cannot be opened when the opening and closing mechanism is pressed. At this time, the staff needs to adjust the opening spring to perform the opening operation. If an emergency situation requires timely opening, the staff's adjustment of the opening spring will increase the opening time, which will increase the probability of risk. The design is equipped with a spare switch and an unlocking rod inside the casing. The staff can directly press the spare switch to make the unlocking rod directly press the locking block to unlock the turntable. At this time, the gas-insulated contact pressure adjustable vacuum circuit breaker is opened. Therefore, the design ensures that the staff can open the circuit through the spare switch in an emergency, ensures the opening speed in an emergency, and improves the safety of the gas-insulated contact pressure adjustable vacuum circuit breaker.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The design sets a detection component inside the gas-insulated contact pressure adjustable vacuum circuit breaker. When the elasticity of the opening spring decreases, the detection component limits the rotation of the shaft. At this time, the moving contact cannot be opened. The staff adjusts the length of the opening spring through the adjustment component to increase the elasticity of the opening spring. Only then can the moving contact be opened. This design makes it impossible for the moving contact to be opened when the opening speed is insufficient, avoiding the arc between the moving contact and the static contact caused by insufficient opening speed, thereby increasing the wear and damage of the moving contact and the static contact, and also improving the safety of the staff when opening.

[0025] 2. This design uses the gravity of the slider 2 to detect the opening spring, avoiding the use of other conventional structures to detect the opening spring. If the detection structure is worn, the tension on the slider 1 will change, which will lead to inaccurate detection of the elasticity of the opening spring. Therefore, this design avoids the influence of factors such as wear and aging on the elasticity detection of the opening spring, and improves the reliability of the gas-insulated contact pressure adjustable vacuum circuit breaker.

[0026] 3. The design has a rectangular block fixedly connected to the locking block. When the staff adjusts the opening spring, the limit block moves upward, and the slider 1 continuously presses the control rod, and the control rod moves the locking block. When the control rod is fully pressed into place, the rectangular block passes through the rectangular groove and contacts the limit block, and the ratchet 1 on the rectangular block contacts the ratchet 2 on the limit block, causing the limit block to be unable to move further. At this time, the staff can know that the opening spring has been adjusted into place. Therefore, this design not only ensures the work efficiency of the staff, but also avoids the opening spring from being over-stretched, thereby increasing the service life of the opening spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a gas-insulated contact pressure-adjustable vacuum circuit breaker of the present invention;

[0028] Figure 2 for Figure 1 Sectional view at AA;

[0029] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0030] Figure 4 for Figure 1 Sectional view at CC;

[0031] Figure 5 for Figure 4 Enlarged view of point D in the middle;

[0032] Figure 6 It is a structural schematic diagram of a mounting seat 1 of the present invention;

[0033] Figure 7 for Figure 6 Sectional view at EE;

[0034] Figure 8 for Figure 6 Cross-sectional view at FF.

[0035] In the figure: 1. vacuum interrupter; 2. housing; 3. static contact; 4. moving contact; 5. connecting rod 1; 6. connecting rod 2; 7. turntable; 8. mounting seat 1; 9. slider 1; 10. opening spring; 11. opening and closing mechanism; 12. rotating shaft; 13. limit block; 14. mounting seat 2; 15. slider 2; 16. rope; 17. locking block; 18. protrusion; 19. spring 1; 20. control lever; 21. connecting shaft; 22. rack; 23. gear; 24. handle; 25. spring 2; 26. ratchet; 27. buffer block; 28. sliding groove; 29. ​​round rod; 30. rectangular groove; 31. rectangular block; 32. ratchet 1; 33. ratchet 2; 34. wire groove; 35. spare switch; 36. unlocking lever; 37. locking tongue. DETAILED DESCRIPTION

[0036] The present invention provides a gas-insulated contact pressure-adjustable vacuum circuit breaker, and the technical solution is as follows:

[0037] See also Figures 1 to 8A gas-insulated contact pressure-adjustable vacuum circuit breaker comprises a vacuum interrupter 1, a housing 2, a static contact 3 and a moving contact 4, wherein the vacuum interrupter 1 is fixedly connected to the housing 2, the static contact 3 is fixedly connected to the vacuum interrupter 1, the moving contact 4 is slidably connected to the vacuum interrupter 1, one end of the moving contact 4 is fixedly connected to a connecting rod 1 5, the connecting rod 1 5 is rotatably connected to the inside of the housing 2, one end of the connecting rod 1 5 is also rotatably connected to a connecting rod 2 6, one end of the connecting rod 2 6 is rotatably connected to a turntable 7, the inside of the housing 2 is also rotatably connected to a rotating shaft 12, the turntable 7 is fixedly connected to the rotating shaft 12, and the housing 2 is also provided with a switch-on and switch-off mechanism 11, the switch-on and switch-off mechanism 11 is connected to the rotating shaft 12, and the switch-on and switch-off mechanism 11 is a switch-on and switch-off mechanism in the prior art. A gate spring, a motor and a switch, etc., the motor is used to control the closing spring to store energy, and the switch is used to control the locking and unlocking of the rotating shaft. Two mounting seats 8 are fixedly installed inside the housing 2, and a detection component with a slider 9 is arranged inside the mounting seat 8. The slider 9 is slidably connected inside the mounting seat 8. A gate opening spring 10 is also arranged inside the housing 2, and the two ends of the gate opening spring 10 are respectively fixedly connected to the connecting rod 5 and the slider 9. The detection component is also connected to the turntable 7. An adjustment component is also arranged inside the housing 2. When the moving contact 4 is in contact with the static contact 3 and the length of the gate opening spring 10 is greater than the set value, the detection component limits the rotation of the turntable 7, and the adjustment component is used to adjust the length of the spring when the moving contact 4 is in contact with the static contact 3.

[0038] For further information, see Figures 1 to 8The detection component includes a limit block 13, which is arranged inside the mounting seat 8, the limit block 13 contacts the slider 9, and the limit block 13 limits the slider 9 from moving downward. A mounting seat 2 is also arranged inside the housing 2, and the mounting seat 2 14 is slidably connected to the slider 2, a rope 16 is arranged between the slider 9 and the slider 2 15, a locking block 17 is also slidably connected to the mounting seat 8, a protrusion 18 is fixedly connected to the turntable 7, a spring 19 is arranged between the locking block 17 and the mounting seat 8, a control rod 20 is hinged on the limit block 13, one end of the control rod 20 extends to the inside of the mounting seat 8 and contacts the slider 9, and the other end of the control rod 20 is connected to the locking block 17, a sliding groove 28 is opened on the locking block 17, and a round rod 29 is fixedly installed at one end of the control rod 20, and the round rod 29 is slidably connected to the inside of the sliding groove 28, and the adjustment The joint assembly includes a connecting shaft 21, which is rotatably connected to the inside of the shell 2, and a limit block 13 is slidably connected to the inside of the mounting seat 8. A rack 22 is arranged on the limit block 13, and two gears 23 are rotatably fixedly connected to the connecting shaft 21, and the two gears 23 are respectively meshed with the racks 22 on the two limit blocks 13. One end of the connecting shaft 21 extends to the outside of the shell 2, and a handle 24 is arranged at one end of the connecting shaft 21. A lock tongue 37 is also slidably connected to the inside of the shell 2, and a spring 25 is arranged between the lock tongue 37 and the shell 2. A ratchet 26 is also fixedly connected to the connecting shaft 21, and the ratchet 26 contacts the lock tongue 37. When the connecting shaft 21 rotates away from the side of the mounting seat 8, the rack 22 moves upward, and the lock tongue 37 limits the ratchet 26 from rotating toward the side where the mounting seat 8 is located. The ratio of the elastic force when the spring 19 is fully compressed to the gravity of the slider 15 is 1:200.

[0039] See also Figures 1 to 8, four buffer blocks 27 are hinged inside the mounting seat 8, and a torsion spring is arranged at the hinge between the buffer block 27 and the mounting seat 8, and the torsion direction of the torsion spring is toward the inside of the mounting seat 8, a sliding groove 28 is provided on the locking block 17, and a round rod 29 is fixedly installed at one end of the control rod 20, and the round rod 29 is slidably connected inside the sliding groove 28, and a rectangular groove 30 is provided on the mounting seat 8, and a rectangular block 31 is fixedly connected to the locking block 17, and a ratchet 32 ​​is arranged on the rectangular block 31, and a ratchet 33 is arranged on the limit block 13. When the slider 9 contacts the limit block 13, the rectangular block 31 passes through the rectangular groove 30 and moves to the mounting seat On the inner side of the seat 1 8, the ratchet 1 32 contacts the ratchet 2 33, and the ratchet 1 32 limits the movement of the limit block 13 by contacting the ratchet 2 33. The two sides of the mounting seat 2 14 are fixedly connected with wire grooves 34, and the two sides and corners of the wire grooves 34 are chamfered. The ropes 16 on both sides of the mounting seat 2 14 are slidably connected to the wire grooves 34. A spare switch 35 is provided on the outer shell 2, and the spare switch 35 is slidably connected to the outer shell 2. An unlocking rod 36 is fixedly connected to the spare switch 35, and the unlocking rod 36 contacts the locking block 17. When the spare switch 35 is pressed, the unlocking rod 36 moves the locking block 17.

[0040] When the staff operates the opening and closing mechanism 11 to close the gas-insulated contact pressure adjustable vacuum circuit breaker, during the process, the staff presses the closing switch on the opening and closing mechanism 11, and the opening and closing mechanism 11 drives the rotating shaft 12 to rotate rapidly and drives the connecting rod 2 6 to drive the connecting rod 1 5 to rotate around the housing 2. At this time, the moving contact 4 at one end of the connecting rod 1 5 moves upward rapidly and contacts with the static contact 3 to complete the closing. In the process of the connecting rod 1 5 rotating around the housing 2, the connecting rod 1 5 stretches the opening spring 10, one end of the opening spring 10 is stretched by the connecting rod 1 5, and the other end pulls the slider 1 9 in the mounting seat 1 8, so that the slider 1 9 pulls the slider 2 15 in the mounting seat 2 14 through the rope 16. At this time, the slider 1 9 is attached to the limit block 13 and applies pressure to the control rod 20 on the limit block 13, so that the control rod 20 rotates around the limit block 13 and pulls the locking block 17 on one side, and the locking block 17 moves toward the side where the mounting seat is located and away from the protrusion 18 on the turntable 7.

[0041] When the opening spring 10 inside the gas-insulated contact pressure adjustable vacuum circuit breaker ages and becomes insufficient in elasticity, at this time, the slider 19 is pulled by the gravity of the slider 2 15, and the slider 19 moves upward. During the movement of the slider 19, the elasticity of the opening spring 10 gradually increases until the tension of the opening spring 10 on the slider 9 plus the gravity of the slider 9 itself is equal to the gravity of the slider 2 15, and the slider 9 stops moving. At this time, the slider 9 is away from the limit block 13, and the control rod 20 on the limit block 13 loses the pressure of the slider 9, thereby causing the locking block 17 to lose the tension of the control rod 20. At this time, the locking block 17 is acted upon by the spring 19 to move toward the outside of the mounting seat 8 and contact the protrusion 18 on the turntable 7, and restrict the turntable 7 and the rotating shaft 12 from rotating in the opening direction. At this time, the staff operates the opening and closing mechanism 11 to prevent the moving contact 4 from moving when the gas-insulated contact pressure adjustable vacuum circuit breaker is opened.

[0042] When the opening spring 10 inside the gas-insulated contact pressure-adjustable vacuum circuit breaker ages and becomes insufficient in elasticity, the staff adjusts the opening spring 10. During this process, the staff needs to turn the handle 24 on the side of the housing 2. At this time, the handle 24 drives the connecting shaft 21 inside the housing 2 to rotate, and the gear 23 and the ratchet 26 on the connecting shaft 21 rotate together with the connecting shaft 21. When the ratchet 26 rotates counterclockwise, the ratchet 26 continuously squeezes the locking tongue 37 in contact with it, and the locking tongue 37 is compressed by the pressure of the spring 25. When the ratchet 26 rotates clockwise, the ratchet 26 will be stuck by the locking tongue 37 and cannot rotate. When the gear 23 rotates, the rack 22 meshing with it will move upward. At this time, the limit block 13 will move upward with the rack 22, and the control rod 20 hinged on the limit block 13 will also move with the limit block 13. The round rod 29 on the control rod 20 moves in the sliding groove 28 on the locking block 17. When the control rod 20 contacts the slider 9, the limit block 13 continues to move, the control rod 20 pushes the slider 9, and the slider 9 stretches the opening spring 10. At this time, with the continuous movement of the limit block 13, the elastic force of the opening spring 10 continues to increase, and the pulling force of the opening spring 10 on the slider 9 continues to increase, and the pressure of the slider 9 on the control rod 20 continues to increase. At this time, the control rod 20 is subjected to the pressure of the slider 9 and rotates around the limit block 13. At this time, the control rod 20 continuously pulls the locking block 17 to move in the direction away from the protrusion 18. At this time, the rectangular block 31 on the locking block 17 follows the locking block 17 to move and pass through the rectangular hole. When the ratchet 1 32 on the rectangular block 31 contacts the ratchet 2 33 on the limit block 13, the locking block 17 is completely away from the protrusion 18, and the limit block 13 can no longer move. At this time, the opening spring 10 is stretched to a suitable position. The elastic force of the opening spring 10 can meet the requirement of rapid opening of the moving contact 4. At this time, the gear 23 and the handle 24 can no longer rotate, and the staff completes the adjustment of the opening spring 10.

[0043] When the staff operates the opening and closing mechanism 11 to open the gas-insulated contact pressure adjustable vacuum circuit breaker, during the process, the staff presses the opening switch on the opening and closing mechanism 11. At this time, the opening and closing mechanism 11 unlocks the rotating shaft 12, and the connecting rod 15 rotates around the housing 2 under the pulling force of the opening spring 10. The connecting rod 26 rotates with the connecting rod 15 and drives the turntable 7 and the rotating shaft 12 to rotate. At this time, the moving contact 4 at one end of the connecting rod 15 moves with the connecting rod 15 and quickly separates from the static contact 3. During the opening process, the elasticity of the opening spring 10 gradually decreases. At this time, the slider 19 moves upward under the action of the gravity of the slider 15. After moving a certain distance, the side of the slider 19 contacts the buffer block 27 on the inner wall of the mounting seat. The slider 10 applies pressure to the buffer block 27 so that the buffer block 27 squeezes the torsion spring and rotates around the mounting seat 18. At this time, the slider 19 is gradually slowed down by the pressure of the buffer block 27 until it stops moving completely.

[0044] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A gas-insulated contact pressure-adjustable vacuum circuit breaker, comprising a vacuum interrupter (1), a housing (2), a stationary contact (3) and a moving contact (4), wherein the vacuum interrupter (1) is fixedly connected to the housing (2), the stationary contact (3) is fixedly connected to the vacuum interrupter (1), the moving contact (4) is slidably connected to the vacuum interrupter (1), one end of the moving contact (4) is fixedly connected to a connecting rod (5), the connecting rod (5) is rotatably connected to the inside of the housing (2), one end of the connecting rod (5) is also rotatably connected to a connecting rod (6), one end of the connecting rod (6) is rotatably connected to a rotating disk (7), the inside of the housing (2) is also rotatably connected to a rotating shaft (12), the rotating disk (7) is fixedly connected to the rotating shaft (12), the housing (2) is also provided with an opening and closing mechanism (11), the opening and closing mechanism (11) is connected to the rotating shaft (12), and the characteristic is that: Two mounting seats (8) are fixedly mounted inside the housing (2). A detection assembly having a slider (9) is arranged inside the mounting seat (8). The slider (9) is slidably connected inside the mounting seat (8). A trip spring (10) is also arranged inside the housing (2). The two ends of the trip spring (10) are respectively fixedly connected to the connecting rod (5) and the slider (9). The detection assembly is also connected to the rotating disk (7). An adjustment assembly is also arranged inside the housing (2). When the moving contact (4) is in contact with the stationary contact (3) and the length of the trip spring (10) is greater than a set value, the detection assembly limits the rotation of the rotating disk (7). The adjustment assembly is used to adjust the length of the spring when the moving contact (4) is in contact with the stationary contact (3).

2. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 1, characterized in that: The detection assembly comprises a limit block (13), the limit block (13) is arranged inside the mounting seat 1 (8), the limit block (13) contacts with the slider 1 (9), and the limit block (13) limits the slider 1 (9) from moving downward. The housing (2) is also provided with a mounting seat 2 (14), the mounting seat 2 (14) is slidably connected to the slider 2 (15), a rope (16) is provided between the slider 1 (9) and the slider 2 (15), the mounting seat 1 (8) is also slidably connected to a locking block (17), and the rotating disk (7) is provided with a locking block (17). A protrusion (18) is fixedly connected, a spring (19) is arranged between the locking block (17) and the mounting seat (8), a control rod (20) is hinged on the limit block (13), one end of the control rod (20) extends to the inside of the mounting seat (8) and contacts with the slider (9), the other end of the control rod (20) is connected to the locking block (17), a sliding groove (28) is provided on the locking block (17), and a round rod (29) is fixedly installed on one end of the control rod (20), and the round rod (29) is slidably connected inside the sliding groove (28).

3. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 2, characterized in that: The adjustment assembly comprises a connecting shaft (21), the connecting shaft (21) is rotatably connected to the inside of the housing (2), the limiting block (13) is slidably connected to the inside of the mounting seat (8), a rack (22) is arranged on the limiting block (13), two gears (23) are fixedly connected to the connecting shaft (21), the two gears (23) are respectively meshed with the racks (22) on the two limiting blocks (13), one end of the connecting shaft (21) extends to the outside of the housing (2), and the connecting shaft (21) is provided with a toothed rack (22). 1) is provided with a handle (24) at one end, a locking tongue (37) is slidably connected inside the shell (2), a spring (25) is provided between the locking tongue (37) and the shell (2), a ratchet (26) is fixedly connected to the connecting shaft (21), the ratchet (26) is in contact with the locking tongue (37), when the connecting shaft (21) rotates away from the side of the mounting seat (8), the rack (22) moves upward, and the locking tongue (37) restricts the ratchet (26) from rotating toward the side where the mounting seat (8) is located.

4. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 3, characterized in that: Four buffer blocks (27) are hinged inside the mounting seat (8), and a torsion spring is arranged at the hinge between the buffer block (27) and the mounting seat (8), and the torsion direction of the torsion spring is toward the inside of the mounting seat (8).

5. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 3, characterized in that: The opening spring (10) is fixedly connected to the middle part of the slider (9); when the moving contact (4) is in the opening state, the opening spring (10) is perpendicular to the horizontal plane; when the moving contact (4) is in the opening state and the limit block (13) moves to the maximum distance, there is a gap between the opening spring and the inner wall of the mounting seat (8).

6. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 3, characterized in that: The first mounting seat (8) is provided with a rectangular groove (30), the locking block (17) is fixedly connected with a rectangular block (31), the rectangular block (31) is provided with a first ratchet (32), and the limiting block (13) is provided with a second ratchet (33).

7. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 6, characterized in that: The two sides of the second mounting seat (14) are fixedly connected with a wire groove (34), and the two sides and corners of the wire groove (34) are chamfered. The ropes (16) on the two sides of the second mounting seat (14) are slidably connected to the wire groove (34).

8. A gas-insulated contact pressure adjustable vacuum circuit breaker according to claim 7, characterized in that: The housing (2) is provided with a standby switch (35), the standby switch (35) is slidably connected to the housing (2), and the standby switch (35) is fixedly connected with an unlocking rod (36), and the unlocking rod (36) is in contact with a locking block (17).

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