A high-voltage circuit breaker opening and closing device
By designing a contact buffer mechanism and a conductive rod drive mechanism in the high-voltage circuit breaker, the problem of arc damage to the contacts was solved, stable opening and closing of the contacts was achieved, and the service life of the equipment was extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XUZHOU YILE ELECTRICAL TECH CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
When the contacts of a high-voltage circuit breaker are opened and closed, the electric arc can damage the contacts, leading to poor circuit contact.
A high-voltage circuit breaker opening and closing device is designed, comprising fixed contacts and movable contacts. A contact buffer mechanism is set to mitigate the impact of electric arc between the movable and fixed contacts. The smooth opening and closing of the contacts is achieved through a conductive rod and an opening and closing drive mechanism. A limit slide and a reset assembly are used to ensure that the electric arc is generated before the contacts are disconnected, avoiding direct contact damage.
It effectively avoids damage to the contacts caused by electric arc, ensures stable contact of the contacts, extends the service life of the equipment, and reduces impact damage caused by rapid closing.
Smart Images
Figure CN120473355B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-voltage circuit breakers, and more specifically to a high-voltage circuit breaker opening and closing device. Background Technology
[0002] A high-voltage circuit breaker is an electrical device capable of connecting and disconnecting high-voltage circuits under normal and fault conditions. In power systems, its primary functions are control and protection. Specifically, during normal operation, it can open and close circuits according to system operating requirements, such as the activation and deactivation of equipment.
[0003] Currently, even with arc-extinguishing structures in high-voltage circuit breakers, electric arcs still occur between the contacts. The arc-extinguishing structures can extinguish the arc quickly and effectively. When the contacts of a high-voltage circuit breaker begin to separate, a very high electric field strength is formed between the contacts because the current in the circuit cannot instantly drop to zero. According to gas discharge theory, under a sufficiently high electric field strength, the gas between the contacts (even insulating gases like SF6) will be ionized, forming a plasma channel, thus generating an electric arc. This is a physical process that is almost unavoidable at the moment of circuit breaking, and the arc extinguishing speed can be accelerated by speeding up the opening and closing process.
[0004] However, the generation of electric arc will inevitably damage the contacts, which can easily lead to poor circuit contact after closing. Moreover, rapid closing will impact the contacts, thereby damaging them. Summary of the Invention
[0005] The purpose of this invention is to provide a high-voltage circuit breaker opening and closing device to solve the problem of poor circuit contact caused by electric arc damage to the contacts during contact opening and closing.
[0006] To achieve the above objectives, 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:
[0007] The device includes a fixed contact and a movable contact. The fixed contact is fixed inside the insulating sleeve, and the movable contact is located below the fixed contact. The movable contact is slidably connected to the insulating sleeve. An arc stationary contact is fixed on one side of the fixed contact, and an arc moving contact is slidably connected on one side of the movable contact.
[0008] A contact buffer mechanism is disposed between the movable contact and the arcing contact to mitigate the impact when the movable contact contacts the fixed contact.
[0009] A conductive rod is connected below a movable contact. An opening and closing drive mechanism is connected to the bottom of the conductive rod to drive the opening and closing of the movable contact and the fixed contact. A conductive sleeve is fitted over the conductive rod and is fixed inside an insulating sleeve.
[0010] Preferably, the contact buffer mechanism includes a limiting slide groove, which is formed on one side of the movable contact. A limiting slider is slidably connected inside the limiting slide groove. The limiting slider is connected to the arc moving contact. A connecting ring is connected to the bottom of the arc moving contact. A reset component and a pressure component are provided at the bottom of the connecting ring.
[0011] 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. A reset spring is sleeved on the outside of the fixed rod and is located at the bottom of the connecting ring.
[0012] Preferably, the pressure assembly includes a cylinder, which is disposed below the connecting ring and is fixedly connected to the movable contact. A piston rod is disposed inside the cylinder, and the top end of the piston rod is connected to the connecting ring.
[0013] Preferably, the cylinder has a piston chamber and a gas chamber inside, the bottom end of the piston rod is located inside the piston chamber, the piston chamber matches the piston rod, a connecting hole is provided between the piston chamber and the gas chamber, an exhaust port is provided on one side of the gas chamber, and an intake one-way valve is provided on the other side of the gas chamber.
[0014] Preferably, the opening and closing drive mechanism includes a rotating shaft, which is disposed inside the housing. Both ends of the rotating shaft are rotatably connected to the inner wall of the housing via bearings. A lever is disposed inside the housing. The rotating shaft passes through the lever and is fixedly connected to the lever. A connecting rod is hinged to one end of the rotating shaft, and the end of the connecting rod away from the lever is hinged to a conductive rod.
[0015] Preferably, a drive spring is connected to the end of the lever away from the connecting rod, and an opening / closing switching component is provided at the end of the drive spring away from the lever, and a release component is provided on the outside of the rotating shaft.
[0016] Preferably, the opening and closing switching assembly includes a geared motor, which is fixed inside the housing. The output shaft of the geared motor is fixedly connected to a swing arm, and the other end of the swing arm is fixedly connected to a movable shaft. The movable shaft is connected to a drive spring. C-shaped grooves are provided on both sides of the inner wall of the housing, and the two ends of the movable shaft are respectively located inside the two C-shaped grooves.
[0017] Preferably, the tripping assembly includes a fixed locking plate fixed to the outside of the rotating shaft, two movable locking buckles are provided below the fixed locking plate, and two locking grooves that match the movable locking buckles are provided on the fixed locking plate.
[0018] Preferably, the movable latch is movably connected to the outer casing via a rotating shaft. An electromagnet is provided on one side of the movable latch, and a connecting block is provided at the end of the two movable latches away from the locking groove. The two ends of the connecting block are connected to the two movable latches. The electromagnet corresponds to the connecting block. A spring is provided on the outside of the electromagnet, and one end of the spring is connected to the connecting block.
[0019] The technical effects and advantages provided by the present invention in the above technical solution are as follows:
[0020] 1. By setting a contact buffer mechanism, after the fixed contact and the moving contact are disconnected, the stationary contact and the moving contact of the arc will also disconnect. Furthermore, before the fixed contact and the moving contact come into contact, the stationary contact and the moving contact of the arc will make contact first. This allows the arc to be generated between the stationary contact and the moving contact of the arc, which can prevent the arc from damaging the fixed contact and the moving contact. In addition, the contact buffer mechanism provides buffering to prevent the fixed contact and the moving contact from making rapid contact, which could cause damage to the fixed contact or the moving contact due to impact.
[0021] 2. The geared motor can drive the movable shaft through the swing arm, causing the movable shaft to slide along the C-shaped groove. When the movable shaft moves to the top of the C-shaped groove, it retracts the drive spring, causing the other end of the lever to move downward, disengaging the movable contact from the fixed contact. When the movable shaft moves to the bottom of the C-shaped groove, it retracts the drive spring, causing the other end of the lever to move upward, making the movable contact contact the fixed contact. This allows the drive spring to drive the lever to swing upward or downward, enabling the drive spring to simultaneously open and close the movable and fixed contacts.
[0022] 3. By engaging the movable latch with the locking groove, the position of the fixed locking piece can be locked, thereby locking the rotating shaft and finally locking the lever. The two movable latches can lock the open and closed states of the high-voltage circuit breaker. By setting an electromagnet to attract the two movable latches simultaneously, the open and closed states of the high-voltage circuit breaker can be released. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0025] Figure 2 This is a schematic diagram of the internal structure of the insulating sleeve of the present invention.
[0026] Figure 3 For the present invention Figure 2 Enlarged view of the structure of part A.
[0027] Figure 4 This is a schematic diagram of the mating structure of the limiting groove and the limiting slider of the present invention.
[0028] Figure 5 This is a schematic diagram of the mating structure of the cylinder and piston rod of the present invention.
[0029] Figure 6 This is a partial cross-sectional view of the cylinder of the present invention.
[0030] Figure 7 This is a schematic diagram of the internal structure of the cylinder of the present invention.
[0031] Figure 8 This is a partial cross-sectional view of the outer casing of the present invention.
[0032] Figure 9 This is a schematic diagram of the internal structure of the present invention.
[0033] Figure 10 This is a partial structural diagram of the tripping assembly of the present invention.
[0034] Explanation of reference numerals in the attached figures:
[0035] 1. Outer shell; 2. Insulating sleeve; 3. Fixed contact; 4. Moving contact; 5. Arc stationary contact; 6. Arc moving contact; 7. Contact buffer mechanism; 8. Conductive rod; 9. Opening and closing drive mechanism; 10. Conductive sleeve;
[0036] 71. Limiting slide; 72. Limiting slider; 73. Connecting ring; 74. Reset assembly; 75. Pressure assembly;
[0037] 741. Fixing rod; 742. Return spring;
[0038] 751. Cylinder; 752. Piston rod; 753. Piston chamber; 754. Air chamber; 755. Connecting hole;
[0039] 756. Exhaust port; 757. Intake check valve;
[0040] 91. Rotating shaft one; 92. Lever; 93. Connecting rod; 94. Drive spring; 95. Opening and closing interchange assembly; 96. Tripping assembly;
[0041] 951. Gear motor; 952. Swing arm; 953. Movable shaft; 954. C-groove;
[0042] 961. Fixed locking plate; 962. Movable locking buckle; 963. Lock groove; 964. Electromagnet; 965. Spring 1; 966. Connecting block. Detailed Implementation
[0043] 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.
[0044] This invention provides, for example Figures 1-10 The high-voltage circuit breaker opening and closing device shown includes a housing 1 and an insulating sleeve 2 mounted on the top of the housing 1, and further includes:
[0045] The fixed contact 3 and the movable contact 4 are provided. The fixed contact 3 is fixed inside the insulating sleeve 2. The movable contact 4 is located below the fixed contact 3 and is slidably connected to the insulating sleeve 2. An arc stationary contact 5 is fixed on one side of the fixed contact 3, and an arc moving contact 6 is slidably connected on one side of the movable contact 4.
[0046] It should be noted that the movable contact 4 can slide up and down inside the insulating sleeve 2. When the movable contact 4 moves upward to contact the fixed contact 3, the circuit is connected. When the movable contact 4 moves downward to separate from the fixed contact 3, the circuit is disconnected.
[0047] In addition, the stationary arc contact 5 is matched with the moving arc contact 6. After the fixed contact 3 and the moving contact 4 are disconnected, the stationary arc contact 5 and the moving arc contact 6 are also disconnected. Before the fixed contact 3 and the moving contact 4 come into contact, the stationary arc contact 5 and the moving arc contact 6 come into contact first, so that the arc can be generated between the stationary arc contact 5 and the moving arc contact 6, which can prevent the arc from damaging the fixed contact 3 and the moving contact 4.
[0048] A contact buffer mechanism 7 is disposed between the movable contact 4 and the arcing contact 6 to mitigate the impact when the movable contact 4 contacts the fixed contact 3.
[0049] It should be noted that by setting the contact buffer mechanism 7, the arc moving contact 6 is made higher than the top of the movable contact 4, so that the arc moving contact 6 can contact the arc stationary contact 5 before the movable contact 4 contacts the fixed contact 3. This can prevent the arc from damaging the fixed contact 3 and the movable contact 4, thus preventing poor contact between the fixed contact 3 and the movable contact 4. Furthermore, the contact buffer mechanism 7 provides buffering to prevent the fixed contact 3 and the movable contact 4 from making rapid contact, which could cause damage to the fixed contact 3 or the movable contact 4 due to impact.
[0050] 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, which is used to drive the opening and closing of the movable contact 4 and the fixed contact 3. A conductive sleeve 10 is sleeved on the outside of the conductive rod 8, and the conductive sleeve 10 is fixed inside the insulating sleeve 2.
[0051] 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 connected movable contact 4 to slide up and down, and ensure that the arc stationary contact 5 and the arc moving contact 6 are aligned. 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.
[0052] In addition, terminals are provided on the top and one side of the insulating sleeve 2, so that they can be connected to the fixed contact 3 and the conductive sleeve 10 respectively.
[0053] Preferably, the contact buffer mechanism 7 includes a limiting slide groove 71, which is formed on one side of the movable contact 4. A limiting slider 72 is slidably connected inside the limiting slide groove 71. The limiting slider 72 is connected to the arc moving contact 6. A connecting ring 73 is connected to the bottom of the arc moving contact 6. A reset component 74 and a pressure component 75 are provided at the bottom of the connecting ring 73.
[0054] It should be noted that the arc-moving contact 6 slides with the movable contact 4 via the limiting slider 72 and the limiting groove 71. Furthermore, the arc-moving contact 6 is connected to the reset assembly 74 and the pressure assembly 75 via the connecting ring 73. The reset assembly 74 can support the connecting ring 73, ensuring that the arc-moving contact 6 always extends beyond the top of the movable contact 4, allowing the arc-moving contact 6 to contact the arc-stationary contact 5 before the movable contact 4 contacts the fixed contact 3. The pressure assembly 75 can provide cushioning to prevent the movable contact 4 from impacting the fixed contact 3 and causing damage.
[0055] In actual use, the arc-moving contact 6, driven by the movable contact 4, first contacts the arc-stationary contact 5. Then, the pressure component 75 buffers the contact, reducing the impact force when the movable contact 4 contacts the fixed contact 3, thus avoiding damage to either the movable contact 4 or the fixed contact 3. After the movable contact 4 and the fixed contact 3 separate, the arc-moving contact 6 can remain connected to the arc-stationary contact 5 under the action of the reset component 74 until the fixed contact 3 and the movable contact 4 separate a certain distance. At this time, an arc will be generated between the arc-moving contact 6 and the arc-stationary contact 5, preventing the arc from damaging the fixed contact 3 and the movable contact 4.
[0056] 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. A reset spring 742 is sleeved on the outside of the fixed rod 741, and the reset spring 742 is disposed at the bottom of the connecting ring 73.
[0057] It should be noted that the connecting ring 73 can be limited by the cooperation of the fixed rod 741 and the connecting ring 73, allowing the connecting ring 73 to move vertically up and down. The return spring 742 pushes the connecting ring 73, keeping it above the fixed rod 741. This allows the arc-moving contact 6 to extend beyond the movable contact 4. When the movable contact 4 moves upward, the arc-moving contact 6 contacts the arc-stationary contact 5. The arc-moving contact 6 is pushed downward, which can compress the return spring 742. When the movable contact 4 disengages from the fixed contact 3, the arc-moving contact 6 can move upward under the push of the return spring 742, keeping the arc-moving contact 6 in contact with the arc-stationary contact 5.
[0058] Preferably, the pressure assembly 75 includes a cylinder 751, which is disposed below the connecting ring 73. The cylinder 751 is fixedly connected to the movable contact 4. A piston rod 752 is disposed inside the cylinder 751, and the top end of the piston rod 752 is connected to the connecting ring 73.
[0059] It should be noted that the up-and-down movement of the arc contact 6 can drive the piston rod 752 to slide up and down inside the cylinder 751.
[0060] Preferably, the cylinder 751 has a piston chamber 753 and an air chamber 754 inside. The bottom end of the piston rod 752 is located 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 intake one-way valve 757 is provided on the other side of the air chamber 754.
[0061] It should be noted that when the piston rod 752 moves downward, it can push the air inside the piston chamber 753, causing the air to be 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, causing external air to be drawn into the air chamber 754 through the exhaust hole 756 and the intake one-way valve 757.
[0062] 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, causing the air chamber 754 to exhaust. 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 draw in air, causing the air chamber 754 to draw in air.
[0063] In addition, when the air chamber 754 is drawing in air, it can draw in air through the exhaust port 756 and the one-way valve 757, which can increase the intake volume and reduce the intake resistance. When the air chamber 754 is venting air, it can only vent through the exhaust port 756, which can reduce the exhaust volume and thus increase the exhaust resistance, thereby buffering the movement of the movable contact 4.
[0064] Preferably, the opening and closing drive mechanism 9 includes a rotating shaft 91, which is disposed inside the housing 1. Both ends of the rotating shaft 91 are rotatably connected to the inner wall of the housing 1 via bearings. A lever 92 is disposed inside the housing 1. The rotating shaft 91 passes through the lever 92 and is fixedly connected to the lever 92. A connecting rod 93 is hinged to one end of the rotating shaft 91. The end of the connecting rod 93 away from the lever 92 is hinged to the conductive rod 8.
[0065] It should be noted that the lever 92 swings around the pivot 91. One end of the lever 92 is connected to the conductive rod 8 through the connecting rod 93. By swinging the lever 92, the conductive rod 8 and the movable contact 4 fixedly connected to the conductive rod 8 can be moved up and down.
[0066] Preferably, a drive spring 94 is connected to the end of the lever 92 away from the connecting rod 93, and an opening and closing switching component 95 is provided at the end of the drive spring 94 away from the lever 92. A release component 96 is provided on the outside of the rotating shaft 91.
[0067] It should be noted that the drive spring 94 can pull the other end of the lever 92 to move, and by setting the opening and closing switching component 95, one end of the drive spring 94 can be driven up or down, so that the drive spring 94 can drive the lever 92 to swing up or down, and the drive spring 94 can simultaneously realize the opening and closing of the movable contact 4 and the fixed contact 3.
[0068] Preferably, the opening and closing switching component 95 includes a reduction motor 951, which is fixed inside the housing 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 a drive spring 94. 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 located inside the two C-shaped grooves 954.
[0069] It should be noted that the geared motor 951 can drive the movable shaft 953 through the swing arm 952, so that the movable shaft 953 can slide along the C-shaped groove 954.
[0070] When the movable shaft 953 moves to the top of the C-shaped groove 954, it causes the other end of the lever 92 to move downward by contracting the drive spring 94, so that the movable contact 4 is disengaged from the fixed contact 3.
[0071] When the movable shaft 953 moves to the bottom of the C-shaped groove 954, it causes the other end of the lever 92 to move upward by contracting the drive spring 94, so that the movable contact 4 contacts the fixed contact 3.
[0072] Preferably, the release assembly 96 includes a fixed locking plate 961 fixed to the outside of the rotating shaft 91, two movable latches 962 are provided below the fixed locking plate 961, and two locking grooves 963 that match the movable latches 962 are provided on the fixed locking plate 961.
[0073] It should be noted that by cooperating with the movable latch 962 and the locking groove 963, the position of the fixed locking piece 961 can be locked, thereby locking the rotating shaft 91, and finally locking the lever 92. The setting of the two movable latches 962 can lock the open and closed states of the high-voltage circuit breaker.
[0074] Preferably, the movable latch 962 is movably connected to the outer casing 1 via a rotating shaft. An electromagnet 964 is provided on one side of the movable latch 962. A connecting block 966 is provided at the end of the two movable latches 962 away from the locking groove 963. The two ends of the connecting block 966 are connected to the two movable latches 962. The electromagnet 964 corresponds to the connecting block 966. A spring 965 is provided on the outside of the electromagnet 964. One end of the spring 965 is connected to the connecting block 966.
[0075] It should be noted that the spring 965 can push one end of the movable latch 962 to keep the movable latch 962 locked, while the electromagnet 964 is activated to attract the connecting block 966, causing the movable latch 962 to disengage and release the lock on the lever 92.
[0076] In addition, by setting an electromagnet 964 to simultaneously attract two movable latches 962, the high-voltage circuit breaker can be tripped in both open and closed states.
[0077] Working principle of this invention:
[0078] Refer to the instruction manual appendix Figures 1-10 Before the circuit breaker is tripped, the geared motor 951 moves to the uppermost position through the swing arm 952 and the drive shaft 953. At this time, the movable latch 962 engages in one of the locking grooves 963 on the fixed locking plate 961.
[0079] When the circuit breaker is tripped, the electromagnet 964 is activated, which opens the movable latch 962, releases the lock on the rotating shaft 91, drives the spring 94 to pull one end of the lever 92 upward, and causes the other end of the lever 92 to pull the connecting rod 93 and the conductive rod 8, causing the movable contact 4 to move downward and disengage from the fixed contact 3.
[0080] At this time, under the action of the return spring 742, the arc moving contact 6 will not move downward with the moving contact 4, but will slide relative to the moving contact 4, so that the arc moving contact 6 is still connected with the arc stationary contact 5. Then, as the moving contact 4 moves downward again, the arc moving contact 6 disengages from the arc stationary contact 5, so that an arc is generated between the arc stationary contact 5 and the arc moving contact 6.
[0081] Before closing the circuit, the geared motor 951 moves to the lowest end through the transmission shaft 953 via the swing arm 952. At this time, the movable latch 962 engages in another locking groove 963 on the fixed locking plate 961.
[0082] When the circuit is closed, the electromagnet 964 is activated, which opens the movable latch 962, releases the lock on the rotating shaft 91, and drives 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 approach the fixed contact 3.
[0083] At this time, the moving contact 6 of the arc first contacts the stationary contact 5 of the arc. 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. Finally, it is discharged through the exhaust hole 756. When the air chamber 754 is venting, it can only vent through the exhaust hole 756, which can reduce the venting volume and increase the venting resistance, thereby buffering the movement of the moving contact 4. Finally, the moving contact 4 contacts the fixed contact 3 to complete the closing.
[0084] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
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) are provided. The fixed contact (3) is fixed inside the insulating sleeve (2). The movable contact (4) is located below the fixed contact (3). The movable contact (4) is slidably connected to the insulating sleeve (2). An arc stationary contact (5) is fixed on one side of the fixed contact (3). An arc moving contact (6) is slidably connected on one side of the movable contact (4). Contact buffer mechanism (7) is disposed between the movable contact (4) and the arcing contact (6) 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 opening and closing of the movable contact (4) and the fixed contact (3). A conductive sleeve (10) is sleeved on the outside of the conductive rod (8). The conductive sleeve (10) is fixed inside the insulating sleeve (2). The contact buffer mechanism (7) includes a limiting slide groove (71), which is located on one side of the movable contact (4). A limiting slider (72) is slidably connected inside the limiting slide groove (71). The limiting slider (72) is connected to the arc-moving contact (6). A connecting ring (73) is connected to the bottom of the arc-moving contact (6). A reset component (74) and a pressure component (75) are provided at the bottom of the connecting ring (73). The pressure component (75) includes a cylinder (751), which is located below the connecting ring (73). The cylinder (751) is fixedly connected to the movable contact (4). Next, a piston rod (752) is provided inside the cylinder (751). The top end of the piston rod (752) is connected to the connecting ring (73). The cylinder (751) is provided with a piston chamber (753) and a gas chamber (754). The bottom end of the piston rod (752) is located 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 gas chamber (754). An exhaust hole (756) is provided on one side of the gas chamber (754). An intake one-way valve (757) is provided on the other side of the gas chamber (754).
2. The high-voltage circuit breaker switching device according to claim 1, 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). A reset spring (742) is sleeved on the outside of the fixed rod (741), and the reset spring (742) is located at the bottom of the connecting ring (73).
3. The high-voltage circuit breaker switching device according to claim 1, characterized in that: The opening and closing drive mechanism (9) includes a rotating shaft (91), which is located inside the outer shell (1). Both ends of the rotating shaft (91) are rotatably connected to the inner wall of the outer shell (1) through bearings. A lever (92) is provided inside the outer shell (1). The rotating shaft (91) passes through the lever (92) and is fixedly connected to the lever (92). A connecting rod (93) is hinged to one end of the rotating shaft (91). The end of the connecting rod (93) away from the lever (92) is hinged to the conductive rod (8).
4. The high-voltage circuit breaker switching device according to claim 3, characterized in that: The lever (92) is connected to a drive spring (94) at the end away from the connecting rod (93). The drive spring (94) is provided with an opening and closing switching component (95) at the end away from the lever (92). The rotating shaft (91) is provided with a tripping component (96) on its exterior.
5. The high-voltage circuit breaker switching device according to claim 4, characterized in that: The opening and closing switching assembly (95) includes a geared motor (951), which is fixed inside the housing (1). The output shaft of the geared 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 a drive spring (94). 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 located inside the two C-shaped grooves (954).
6. The high-voltage circuit breaker opening and closing device according to claim 5, characterized in that: The tripping assembly (96) includes a fixed locking plate (961) fixed to the outside of the rotating shaft (91), and two movable latches (962) are provided below the fixed locking plate (961). The fixed locking plate (961) is provided with two locking grooves (963) that match the movable latches (962).
7. The high-voltage circuit breaker opening and closing device according to claim 6, characterized in that: The movable latch (962) is movably connected to the outer shell (1) via a rotating shaft. An electromagnet (964) is provided on one side of the movable latch (962). A connecting block (966) is provided at the end of the two movable latches (962) away from the lock groove (963). The two ends of the connecting block (966) are connected to the two movable latches (962). The electromagnet (964) corresponds to the connecting block (966). A spring (965) is provided on the outside of the electromagnet (964). One end of the spring (965) is connected to the connecting block (966).
Citation Information
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