Opening and closing device of high-voltage circuit breaker

Abstract

The invention discloses a high-voltage circuit breaker opening and closing device which comprises a shell and an insulation sleeve installed at the top of the shell and further comprises a fixed contact and a movable contact, the fixed contact is fixed in the insulation sleeve, the movable contact is arranged below the fixed contact and is in sliding connection with the insulation sleeve, and the movable contact is arranged below the fixed contact. One side of the fixed contact is fixedly provided with an arc static contact, and one side of the movable contact is slidably connected with an arc moving contact. According to the invention, through the arrangement of the contact buffer mechanism, after the fixed contact and the movable contact are disconnected, the arc static contact and the arc moving contact are disconnected, so that the arc can be generated between the arc static contact and the arc moving contact, the damage of the arc to the fixed contact and the movable contact can be avoided, and the contact buffer mechanism is used for buffering, so that the service life of the arc is prolonged. And the damage of the fixed contact or the movable contact due to impact caused by quick contact between the fixed contact and the movable contact is avoided.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage circuit breakers, and in particular to a high-voltage circuit breaker opening and closing device. Background Art

[0002] A high-voltage circuit breaker is an electrical device that connects and disconnects high-voltage circuits in both normal and fault conditions. Its primary function in power systems is control and protection. Specifically, during normal operation, it switches circuits on and off according to system operational requirements, such as when equipment is switched on and off.

[0003] Currently, even with arc-extinguishing mechanisms installed in high-voltage circuit breakers, arcs still occur between the contacts. While these mechanisms can extinguish the arc quickly and effectively, when the contacts of a high-voltage circuit breaker begin to separate, a high electric field strength forms between them because the current in the circuit cannot instantly drop to zero. According to gas discharge theory, under sufficiently high electric field strengths, the gas between the contacts (even insulating gases such as SF6) will ionize, forming a plasma channel and generating an arc. This is an almost unavoidable physical process at the moment a circuit is opened and closed, and arc extinguishing can be accelerated by accelerating the opening and closing process.

[0004] However, the generation of arcs will inevitably cause damage to the contacts, which may easily lead to poor circuit contact after closing the circuit. Moreover, rapid closing of the circuit will cause impact on the contacts, thereby damaging the contacts. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-voltage circuit breaker opening and closing device to solve the problem in the art that arc damages contacts during opening and closing, resulting in poor circuit contact.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a high-voltage circuit breaker opening and closing device, comprising a housing and an insulating sleeve mounted on the top of the housing, and further comprising: A fixed contact and a movable contact, wherein the fixed contact is fixed inside the insulating sleeve, the movable contact is arranged below the fixed contact, the movable contact is slidably connected to the insulating sleeve, an arc static contact is fixed on one side of the fixed contact, and an arc moving contact is slidably connected to one side of the movable contact; A contact buffer mechanism is provided between the movable contact and the arc moving contact to mitigate the impact when the movable contact contacts the fixed contact; A conductive rod is connected below the movable contact. The bottom of the conductive rod is connected to an opening and closing drive mechanism for driving the opening and closing of the movable contact and the fixed contact. The outer sleeve of the conductive rod is provided with a conductive sleeve, which is fixed inside the insulating sleeve.

[0007] Preferably, the contact buffer mechanism includes a limiting slide groove, which is opened on one side of the movable contact. The internal sliding connection of the limiting slide groove is provided with a limiting slider, and the limiting slider is connected to the arc moving contact. The bottom of the arc moving contact is connected with a connecting ring, and the bottom of the connecting ring is provided with a reset assembly and a pressure assembly.

[0008] Preferably, the reset assembly includes a fixed rod, both ends of which are fixedly connected to the movable contact, the fixed rod passes through the connecting ring and is slidably connected to the connecting ring, and a reset spring is provided on the outside of the fixed rod, and the reset spring is arranged at the bottom of the connecting ring.

[0009] Preferably, the pressure assembly includes a cylinder, which is arranged below the connecting ring and fixedly connected to the movable contact. A piston rod is provided inside the cylinder, and the top end of the piston rod is connected to the connecting ring.

[0010] Preferably, a piston chamber and an air chamber are provided inside the cylinder, the bottom end of the piston rod is provided inside the piston chamber, the piston chamber matches the piston rod, a connecting hole is provided between the piston chamber and the air chamber, an exhaust hole is provided on one side of the air chamber, and an air intake one-way valve is provided on the other side of the air chamber.

[0011] Preferably, the opening and closing drive mechanism includes a rotating shaft 1, which is arranged inside the shell, and the two ends of the rotating shaft 1 are rotatably connected to the inner wall of the shell through bearings. A lever is provided inside the shell, and the rotating shaft 1 passes through the lever and is fixedly connected to the lever. One end of the rotating shaft 1 is hinged to a connecting rod, and the end of the connecting rod away from the lever is hinged to the conductive rod.

[0012] Preferably, the end of the lever away from the connecting rod is connected to a driving spring, the end of the driving spring away from the lever is provided with an opening and closing exchange component, and the outside of the rotating shaft is provided with a tripping component.

[0013] Preferably, the opening and closing exchange component includes a reduction motor, which is fixed inside the shell, and the output shaft of the reduction motor is fixedly connected to a swing arm, and the other end of the swing arm is fixedly connected to a movable shaft, and the movable shaft is connected to a driving spring, and C-shaped grooves are provided on both sides of the inner wall of the shell, and the two ends of the movable shaft are respectively provided inside the two C-shaped grooves.

[0014] Preferably, the trip assembly includes a fixed locking plate fixed to the outside of the rotating shaft, two movable lock buckles are provided below the fixed locking plate, and two locking grooves matching the movable lock buckles are provided on the fixed locking plate.

[0015] Preferably, the movable lock is movably connected to the shell through a rotating shaft, an electromagnet is provided on one side of the movable lock, and a connecting block is provided at one end of the two movable locks away from the lock slot, and the two ends of the connecting block are connected to the two movable locks, the electromagnet corresponds to the connecting block, and a spring 1 is provided on the outside of the electromagnet, and one end of the spring 1 is connected to the connecting block.

[0016] In the above technical solution, the technical effects and advantages provided by the present invention are: 1. By setting up a contact buffer mechanism, after the fixed contact and the movable contact are disconnected, the arc static contact and the arc moving contact are disconnected accordingly, and before the fixed contact and the movable contact are in contact, the arc static contact and the arc moving contact are in contact first, so that an arc can be generated between the arc static contact and the arc moving contact, which can prevent the arc from causing damage to the fixed contact and the movable contact. In addition, the contact buffer mechanism provides buffering, which prevents the fixed contact and the movable contact from quickly contacting, causing the fixed contact or the movable contact to be damaged due to impact.

[0017] 2. The reduction motor can drive the movable shaft through the swing arm to make the movable shaft slide along the C-shaped groove. When the movable shaft moves to the top of the C-shaped groove, the driving spring is contracted to drive the other end of the lever to move downward, so that the movable contact is disengaged from the fixed contact. When the movable shaft moves to the bottom of the C-shaped groove, the driving spring is contracted to drive the other end of the lever to move upward, so that the movable contact is in contact with the fixed contact, so that the driving spring can drive the lever to swing upward or downward, so that the driving spring can simultaneously realize the opening and closing of the movable contact and the fixed contact.

[0018] 3. By cooperating with the lock slot, the position of the fixed lock piece can be locked, and then the rotating shaft 1 can be locked, and finally the lever can be locked. The setting of the two movable locks can lock the open and closed states of the high-voltage circuit breaker. By setting an electromagnet to attract the two movable locks at the same time, the open and closed states of the high-voltage circuit breaker can be tripped. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 Schematic diagram of the internal structure of the insulating sleeve of the present invention.

[0022] Figure 3 For the present invention Figure 2 A magnified view of the structure of part A.

[0023] Figure 4 It is a schematic diagram of the matching structure of the limiting sliding groove and the limiting sliding block of the present invention.

[0024] Figure 5 It is a schematic diagram of the matching structure of the cylinder and the piston rod of the present invention.

[0025] Figure 6 It is a partial cross-sectional view of the cylinder of the present invention.

[0026] Figure 7 Schematic diagram of the internal structure of the cylinder of the present invention.

[0027] Figure 8 It is a partial cross-sectional view of the housing of the present invention.

[0028] Figure 9 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 10 It is a schematic diagram of the partial structure of the trip assembly of the present invention.

[0030] Description of reference numerals: 1. Housing; 2. Insulating sleeve; 3. Fixed contact; 4. Movable contact; 5. Arc static contact; 6. Arc moving contact; 7. Contact buffer mechanism; 8. Conductive rod; 9. Opening and closing drive mechanism; 10. Conductive sleeve; 71. Limiting slide; 72. Limiting slider; 73. Connecting ring; 74. Reset assembly; 75. Pressure assembly; 741, fixing rod; 742, return spring; 751, cylinder; 752, piston rod; 753, piston chamber; 754, air chamber; 755, connecting hole; 756, exhaust hole; 757, air intake check valve; 91. Rotating shaft 1; 92. Lever; 93. Connecting rod; 94. Driving spring; 95. Opening and closing exchange assembly; 96. Tripping assembly; 951, reduction motor; 952, swing arm; 953, movable shaft; 954, C-shaped slot; 961. Fixed locking piece; 962. Movable locking buckle; 963. Locking slot; 964. Electromagnet; 965. Spring 1; 966. Connecting block. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The present invention provides Figures 1-10The high-voltage circuit breaker opening and closing device shown includes a housing 1 and an insulating sleeve 2 installed on the top of the housing 1, and further includes: A fixed contact 3 and a movable contact 4, wherein the fixed contact 3 is fixed inside the insulating sleeve 2, and the movable contact 4 is arranged below the fixed contact 3 and is slidably connected to the insulating sleeve 2. An arc static contact 5 is fixed to one side of the fixed contact 3, and an arc moving contact 6 is slidably connected to one side of the movable contact 4; It should be noted that the movable contact 4 can slide up and down inside the insulating sleeve 2. The movable contact 4 moves upward to contact the fixed contact 3, thereby connecting the circuit, and the movable contact 4 moves downward to separate from the fixed contact 3, thereby disconnecting the circuit. In addition, the arc static contact 5 is matched with the arc moving contact 6. After the fixed contact 3 and the movable contact 4 are disconnected, the arc static contact 5 and the arc moving contact 6 are disconnected accordingly. Moreover, before the fixed contact 3 and the movable contact 4 are in contact, the arc static contact 5 and the arc moving contact 6 are in contact first, so that an arc can be generated between the arc static contact 5 and the arc moving contact 6, thereby preventing the arc from causing damage to the fixed contact 3 and the movable contact 4. A contact buffer mechanism 7 is provided between the movable contact 4 and the arc movable contact 6 to mitigate the impact when the movable contact 4 contacts the fixed contact 3; It should be noted that, by providing the contact buffer mechanism 7, the arc moving contact 6 is raised above the top of the movable contact 4, so that the arc moving contact 6 can contact the arc static contact 5 before the movable contact 4 contacts the fixed contact 3, thereby preventing the arc from damaging the fixed contact 3 and the movable contact 4, resulting in poor contact between the fixed contact 3 and the movable contact 4. In addition, the contact buffer mechanism 7 provides buffering, thereby preventing the fixed contact 3 and the movable contact 4 from quickly contacting each other, thereby preventing the fixed contact 3 or the movable contact 4 from being damaged by impact. The conductive rod 8 is connected below the movable contact 4. The bottom of the conductive rod 8 is connected to an opening and closing drive mechanism 9 for driving the opening and closing of the movable contact 4 and the fixed contact 3. The outer sleeve of the conductive rod 8 is provided with a conductive sleeve 10, and the conductive sleeve 10 is fixed inside the insulating sleeve 2.

[0033] It should be noted that by setting the conductive sleeve 10, the conductive rod 8 can be limited and guided, so that the conductive rod 8 can drive the movable contact 4 connected to it to slide up and down, and ensure that the arc static contact 5 and the arc moving contact 6 are aligned, and the opening and closing drive mechanism 9 can drive the conductive rod 8 to move, thereby driving the movable contact 4 to move up and down, realizing the opening and closing of the fixed contact 3 and the movable contact 4.

[0034] In addition, terminal blocks are provided on the top and one side of the insulating sleeve 2 to connect to the fixed contact 3 and the conductive sleeve 10 respectively.

[0035] Preferably, the contact buffer mechanism 7 includes a limiting groove 71, which is opened on one side of the movable contact 4. The internal sliding connection of the limiting groove 71 is a limiting slider 72, and the limiting slider 72 is connected to the arc moving contact 6. The bottom of the arc moving contact 6 is connected to a connecting ring 73, and the bottom of the connecting ring 73 is provided with a reset component 74 and a pressure component 75.

[0036] It should be noted that the arc moving contact 6 slides with the movable contact 4 through the limit slider 72 and the limit slot 71, and the arc moving contact 6 is connected to the reset assembly 74 and the pressure assembly 75 through the connecting ring 73. The reset assembly 74 can support the connecting ring 73 so that the arc moving contact 6 always exceeds the top of the movable contact 4, so that the arc moving contact 6 can contact the arc static contact 5 before the movable contact 4 contacts the fixed contact 3, and the pressure assembly 75 can provide buffering to prevent the movable contact 4 from impacting the fixed contact 3 and causing damage.

[0037] In actual use, the arc moving contact 6 first contacts the arc static contact 5 under the drive of the movable contact 4, and then is buffered by the pressure component 75 to reduce the impact force when the movable contact 4 contacts the fixed contact 3, thereby avoiding damage to the movable contact 4 or the fixed contact 3. After the movable contact 4 and the fixed contact 3 are separated, under the action of the reset component 74, the arc moving contact 6 can remain connected to the arc static contact 5 until the fixed contact 3 and the movable contact 4 are separated by a certain distance, and the arc moving contact 6 will be separated from the arc static contact 5. At this time, an arc will be generated between the arc moving contact 6 and the arc static contact 5, thereby avoiding damage to the fixed contact 3 and the movable contact 4 caused by the arc.

[0038] Preferably, the reset assembly 74 includes a fixed rod 741, both ends of which are fixedly connected to the movable contact 4, the fixed rod 741 passes through the connecting ring 73 and is slidably connected to the connecting ring 73, and a reset spring 742 is provided on the outside of the fixed rod 741, and the reset spring 742 is arranged at the bottom of the connecting ring 73.

[0039] It should be noted that, by cooperating with the fixing rod 741 and the connecting ring 73, the connecting ring 73 can be limited so that the connecting ring 73 can move vertically up and down, and the connecting ring 73 is pushed by the reset spring 742 so that the connecting ring 73 is kept above the fixing rod 741, so that the arc moving contact 6 can exceed the movable contact 4. When the movable contact 4 moves upward, the arc moving contact 6 contacts the arc static contact 5. The arc moving contact 6 is pushed downward, which can compress the reset spring 742. When the movable contact 4 is disengaged from the fixed contact 3, the arc moving contact 6 can move upward under the push of the reset spring 742, so that the arc moving contact 6 remains in contact with the arc static contact 5.

[0040] Preferably, the pressure assembly 75 includes a cylinder 751, which is arranged below the connecting ring 73 and fixedly connected to the movable contact 4. A piston rod 752 is provided inside the cylinder 751, and the top of the piston rod 752 is connected to the connecting ring 73.

[0041] It should be noted that the arc moving contact 6 moves up and down, which can drive the piston rod 752 to slide up and down inside the cylinder 751.

[0042] Preferably, a piston chamber 753 and an air chamber 754 are provided inside the cylinder 751, the bottom end of the piston rod 752 is provided inside the piston chamber 753, the piston chamber 753 matches the piston rod 752, a connecting hole 755 is provided between the piston chamber 753 and the air chamber 754, an exhaust hole 756 is provided on one side of the air chamber 754, and an air intake check valve 757 is provided on the other side of the air chamber 754.

[0043] It should be noted that when the piston rod 752 moves downward, it can push the air inside the piston chamber 753, so that the air is discharged from the connecting hole 755 into the air chamber 754, and finally discharged through the exhaust hole 756. When the piston rod 752 moves upward, it can draw air from the air chamber 754 through the connecting hole 755, so that the external air is sucked into the air chamber 754 from the exhaust hole 756 and the air intake check valve 757.

[0044] In actual use, when the movable contact 4 and the fixed contact 3 are in contact, the arc moving contact 6 compresses the air inside the piston chamber 753 through the piston rod 752, so that the air chamber 754 is exhausted. When the movable contact 4 and the fixed contact 3 are separated, under the action of the reset assembly 74, the piston rod 752 is driven to exhaust air, so that the air chamber 754 is inhaled.

[0045] In addition, when the air cavity 754 is inhaling air, it can be inhaled through the exhaust hole 756 and the air inlet one-way valve 757, which can increase the inhalation volume and reduce the inhalation resistance. When the air cavity 754 is exhausted, it can only be exhausted through the exhaust hole 756, which can reduce the exhaust volume, thereby increasing the exhaust resistance, thereby buffering the movement of the movable contact 4.

[0046] Preferably, the opening and closing drive mechanism 9 includes a rotating shaft 91, which is arranged inside the shell 1, and both ends of the rotating shaft 91 are rotatably connected to the inner wall of the shell 1 through bearings. A lever 92 is provided inside the shell 1, and the rotating shaft 91 passes through the lever 92 and is fixedly connected to the lever 92. One end of the rotating shaft 91 is hinged to a connecting rod 93, and the end of the connecting rod 93 away from the lever 92 is hinged to the conductive rod 8.

[0047] It should be noted that the lever 92 swings around the rotating shaft 91, and one end of the lever 92 is connected to the conductive rod 8 through the connecting rod 93. The swing of the lever 92 can drive the conductive rod 8 and the movable contact 4 fixedly connected to the conductive rod 8 to move up and down.

[0048] Preferably, the end of the lever 92 away from the connecting rod 93 is connected to a drive spring 94, the end of the drive spring 94 away from the lever 92 is provided with an opening and closing exchange component 95, and the outside of the rotating shaft 91 is provided with a tripping component 96.

[0049] It should be noted that the driving spring 94 can pull the other end of the lever 92 to move, and by setting an opening and closing exchange component 95, one end of the driving spring 94 can be driven upward or downward, so that the driving spring 94 can drive the lever 92 to swing upward or downward, so that the driving spring 94 can simultaneously realize the opening and closing of the movable contact 4 and the fixed contact 3.

[0050] Preferably, the opening and closing exchange component 95 includes a reduction motor 951, which is fixed inside the outer shell 1. The output shaft of the reduction motor 951 is fixedly connected to a swing arm 952, and the other end of the swing arm 952 is fixedly connected to a movable shaft 953. The movable shaft 953 is connected to the driving spring 94. C-shaped grooves 954 are provided on both sides of the inner wall of the outer shell 1, and the two ends of the movable shaft 953 are respectively provided inside the two C-shaped grooves 954.

[0051] It should be noted that the reduction motor 951 can drive the movable shaft 953 through the swing arm 952 to make the movable shaft 953 slide along the C-shaped groove 954.

[0052] When the movable shaft 953 moves to the top of the C-shaped groove 954, the other end of the lever 92 moves downward by contracting the driving spring 94, so that the movable contact 4 is separated from the fixed contact 3; When the movable shaft 953 moves to the bottom of the C-shaped groove 954 , the other end of the lever 92 is driven to move upward by contracting the driving spring 94 , so that the movable contact 4 contacts the fixed contact 3 .

[0053] Preferably, the trip assembly 96 includes a fixed locking plate 961 fixed to the outside of the rotating shaft 91, two movable lock buckles 962 are provided below the fixed locking plate 961, and two locking grooves 963 matching the movable lock buckles 962 are provided on the fixed locking plate 961.

[0054] It should be noted that by cooperating with the movable lock buckle 962 and the lock slot 963, the position of the fixed lock plate 961 can be locked, and then the rotating shaft 91 can be locked, and finally the lever 92 can be locked. The setting of the two movable lock buckles 962 can lock the open and closed states of the high-voltage circuit breaker.

[0055] Preferably, the movable lock 962 is movably connected to the shell 1 through a rotating shaft, and an electromagnet 964 is provided on one side of the movable lock 962. A connecting block 966 is provided at one end of the two movable locks 962 away from the lock slot 963, and both ends of the connecting block 966 are connected to the two movable locks 962. The electromagnet 964 corresponds to the connecting block 966, and a spring 965 is provided on the outside of the electromagnet 964, and one end of the spring 965 is connected to the connecting block 966.

[0056] It should be noted that the spring 1 965 can push one end of the movable lock 962 to keep the movable lock 962 in a locked state, and the electromagnet 964 is started to attract the connecting block 966, so that the movable lock 962 is disengaged and the lever 92 is unlocked.

[0057] In addition, by arranging the electromagnet 964 to simultaneously attract the two movable locks 962, the high-voltage circuit breaker can be tripped in both the open and closed states.

[0058] Working principle of the present invention: Refer to the instruction manual Figures 1-10 Before opening, the reduction motor 951 drives the movable shaft 953 to move to the uppermost end through the swing arm 952. At this time, the movable lock 962 is buckled into one of the lock slots 963 on the fixed lock plate 961. When opening the switch, the electromagnet 964 is activated, causing the movable lock 962 to open, releasing the lock on the rotating shaft 91, and driving the spring 94 to pull one end of the lever 92 upward, so that the other end of the lever 92 pulls the connecting rod 93 and the conductive rod 8, causing the movable contact 4 to move downward and separate from the fixed contact 3; At this time, under the action of the reset spring 742, the arc moving contact 6 will not move downward with the movable contact 4, but will slide relative to the movable contact 4, so that the arc moving contact 6 is still connected to the arc static contact 5, and then as the movable contact 4 moves downward again, the arc moving contact 6 is separated from the arc static contact 5, so that an arc is generated between the arc static contact 5 and the arc moving contact 6.

[0059] Before closing the circuit breaker, the reduction motor 951 drives the movable shaft 953 to move to the bottom end through the swing arm 952. At this time, the movable lock 962 is buckled into another lock groove 963 on the fixed lock plate 961. When the switch is closed, the electromagnet 964 is activated, causing the movable lock 962 to open, releasing the lock on the rotating shaft 91, and driving the spring 94 to pull one end of the lever 92 downward, so that the other end of the lever 92 pushes the connecting rod 93 and the conductive rod 8, causing the movable contact 4 to move upward and close to the fixed contact 3; At this time, the arc moving contact 6 first contacts the arc static contact 5. When the piston rod 752 moves downward through the connecting ring 73, it can push the air inside the piston chamber 753, so that the air is discharged from the connecting hole 755 into the air chamber 754, and finally discharged through the exhaust hole 756. When the air chamber 754 is exhausted, it can only be exhausted through the exhaust hole 756, which can reduce the exhaust volume, thereby increasing the exhaust resistance, thereby buffering the movement of the movable contact 4. Finally, the movable contact 4 contacts the fixed contact 3 to complete the closing.

[0060] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A high-voltage circuit breaker opening and closing device, comprising a housing (1) and an insulating sleeve (2) mounted on the top of the housing (1), characterized in that: Also includes: A fixed contact (3) and a movable contact (4), wherein the fixed contact (3) is fixed inside the insulating sleeve (2), the movable contact (4) is arranged below the fixed contact (3), the movable contact (4) is slidably connected to the insulating sleeve (2), an arc static contact (5) is fixed on one side of the fixed contact (3), and an arc moving contact (6) is slidably connected to one side of the movable contact (4); A contact buffer mechanism (7), the contact buffer mechanism (7) being arranged between the movable contact (4) and the arc movable contact (6) and being used to mitigate the impact when the movable contact (4) contacts the fixed contact (3); A conductive rod (8) is connected below the movable contact (4); the bottom of the conductive rod (8) is connected to an opening and closing drive mechanism (9) for driving the movable contact (4) and the fixed contact (3) to open and close; the outer sleeve of the conductive rod (8) is provided with a conductive sleeve (10), and the conductive sleeve (10) is fixed inside the insulating sleeve (2).

2. The high-voltage circuit breaker opening and closing device according to claim 1, characterized in that: The contact buffer mechanism (7) includes a limiting slide groove (71), the limiting slide groove (71) is opened on one side of the movable contact (4), the limiting slide groove (71) is internally slidably connected to a limiting slider (72), the limiting slider (72) is connected to the arc moving contact (6), the bottom of the arc moving contact (6) is connected to a connecting ring (73), and the bottom of the connecting ring (73) is provided with a reset component (74) and a pressure component (75).

3. The high-voltage circuit breaker opening and closing device according to claim 2, characterized in that: The reset assembly (74) includes a fixed rod (741), both ends of which are fixedly connected to the movable contact (4), the fixed rod (741) passes through the connecting ring (73) and is slidably connected to the connecting ring (73), and a reset spring (742) is provided on the outside of the fixed rod (741), and the reset spring (742) is arranged at the bottom of the connecting ring (73).

4. The high-voltage circuit breaker opening and closing device according to claim 2, characterized in that: The pressure assembly (75) includes a cylinder (751), which is arranged below the connecting ring (73). The cylinder (751) is fixedly connected to the movable contact (4). A piston rod (752) is provided inside the cylinder (751), and the top end of the piston rod (752) is connected to the connecting ring (73).

5. The high-voltage circuit breaker opening and closing device according to claim 4, characterized in that: The cylinder (751) is provided with a piston chamber (753) and an air chamber (754). The bottom end of the piston rod (752) is provided inside the piston chamber (753). The piston chamber (753) matches the piston rod (752). A connecting hole (755) is provided between the piston chamber (753) and the air chamber (754). An exhaust hole (756) is provided on one side of the air chamber (754). An air intake check valve (757) is provided on the other side of the air chamber (754).

6. The high-voltage circuit breaker opening and closing device according to claim 1, characterized in that: The opening and closing drive mechanism (9) includes a rotating shaft (91), which is arranged inside the housing (1). Both ends of the rotating shaft (91) are rotatably connected to the inner wall of the housing (1) through bearings. A lever (92) is arranged inside the housing (1). The rotating shaft (91) passes through the lever (92) and is fixedly connected to the lever (92). One end of the rotating shaft (91) is hinged to a connecting rod (93), and the end of the connecting rod (93) away from the lever (92) is hinged to the conductive rod (8).

7. The high-voltage circuit breaker switching device according to claim 6, characterized in that: The end of the lever (92) away from the connecting rod (93) is connected to a driving spring (94), the end of the driving spring (94) away from the lever (92) is provided with an opening and closing exchange component (95), and the outside of the rotating shaft (91) is provided with a tripping component (96).

8. The high-voltage circuit breaker switching device according to claim 7, characterized in that: The opening and closing exchange component (95) includes a reduction motor (951), the reduction motor (951) is fixed inside the housing (1), the output shaft of the reduction motor (951) is fixedly connected to a swing arm (952), the other end of the swing arm (952) is fixedly connected to a movable shaft (953), the movable shaft (953) is connected to a driving spring (94), and C-shaped grooves (954) are provided on both sides of the inner wall of the housing (1), and the two ends of the movable shaft (953) are respectively provided inside the two C-shaped grooves (954).

9. The high-voltage circuit breaker switching device according to claim 6, characterized in that: The trip assembly (96) comprises a fixed locking plate (961) fixed to the outside of the rotating shaft (91), two movable locking buckles (962) are provided below the fixed locking plate (961), and two locking grooves (963) matching the movable locking buckles (962) are provided on the fixed locking plate (961).

10. The high-voltage circuit breaker opening and closing device according to claim 9, characterized in that: The movable lock buckle (962) is movably connected to the housing (1) via a rotating shaft. An electromagnet (964) is provided on one side of the movable lock buckle (962). A connecting block (966) is provided at one end of the two movable lock buckles (962) away from the locking groove (963). Both ends of the connecting block (966) are connected to the two movable lock buckles (962). The electromagnet (964) corresponds to the connecting block (966). A spring (965) is provided on the outside of the electromagnet (964), and one end of the spring (965) is connected to the connecting block (966).

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