Mining high-voltage vacuum circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a mining high-voltage vacuum circuit breaker, which comprises a case, a conductive sliding seat, a grounding seat, a linear driving assembly, a conductive sliding block B, a reciprocating driving assembly and a transmission assembly. An epoxy insulator is arranged on the case, and a tulip contact and a vacuum tube are arranged in the epoxy insulator; a conductive sliding block A is arranged on the conductive sliding seat, the conductive sliding block A is connected with a movable contact, and an insulating seat is arranged on the movable contact; the grounding seat is arranged in the epoxy insulator; the linear driving assembly is in driving connection with the insulating seat; one end of the conductive sliding block B is connected with the other end of the conductive sliding seat and the movable end of the vacuum tube; the reciprocating driving assembly is in driving connection with the conductive sliding block B; the transmission assembly is in transmission connection with the linear driving assembly and the reciprocating driving assembly. According to the utility model, grounding of the load end is realized through the three-phase vacuum tube arc extinguish chamber, the safety coefficient is high, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a high-voltage vacuum circuit breaker for mining. Background Technology

[0002] Vacuum circuit breakers are named for their high vacuum conditions, which are the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They have the advantages of small size, light weight, suitability for frequent operation, and no need for maintenance during arc extinguishing, and are widely used in power distribution networks.

[0003] Traditional high-voltage vacuum circuit breakers are mechanically and manually operated. The contact time of the contacts is difficult to control manually, the contact time is long, the flame stay time is long, the flame is large, and the arc extinguishing time is long, which can easily lead to safety hazards. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing a high-voltage vacuum circuit breaker for mining.

[0005] The technical solution of this utility model is as follows: a high-voltage vacuum circuit breaker for mining, including a chassis, an epoxy insulator installed on the chassis, a plum blossom contact and a vacuum tube installed inside the epoxy insulator, a cable A connected to the plum blossom contact, and a cable B connected to the fixed end of the vacuum tube.

[0006] A conductive slide block is set inside an epoxy insulator. A conductive slider A is slidably mounted on the conductive slide block. The conductive slider A is connected to a movable contact. An insulating seat is movably mounted on the movable contact.

[0007] The grounding base is installed inside the epoxy insulation, and the movable contact is located between the plum blossom contact and the grounding base.

[0008] A linear drive assembly is housed within the epoxy insulator and drives the connected insulation base.

[0009] Conductive slider B is slidably connected to the conductive slide block and is connected to the movable end of the vacuum tube.

[0010] A reciprocating drive assembly is housed within an epoxy insulator and drives the connected conductive slider B.

[0011] And a transmission component, which drives the linear drive component and the reciprocating drive component, and the transmission ratio between the linear drive component and the reciprocating drive component is one to two.

[0012] Preferably, a tensioning assembly is provided inside the epoxy insulator. The tensioning assembly includes a slide rod and a spring. The slide rod is connected to the inner wall of the epoxy insulator and is parallel to the conductive slide block. The slide rod passes through the conductive slider A and is slidably connected to it. An insulating washer is provided on the side of the conductive slider A away from the Phillips head. The spring is sleeved on the slide rod, and both ends of the spring abut against the insulating washer and the inner wall of the epoxy insulator, respectively.

[0013] Preferably, a limiting groove is provided on the movable contact, the insulating seat is slidably disposed in the limiting groove, a limiting block is provided on the insulating seat, the limiting block is inserted into the limiting groove and slidably connected to its inner wall.

[0014] Preferably, the linear drive assembly includes a lead screw and a crank. The lead screw is rotatably connected to both the housing and the epoxy insulator. The lead screw passes through the insulating base and is helically connected to it. A worm gear is coaxially mounted on the lead screw. A worm is rotatably mounted on the housing and meshes with the worm gear. The crank is connected to one end of the worm that extends outside the housing.

[0015] Preferably, the reciprocating drive assembly includes a reciprocating lead screw, which is located within and rotatably connected to an epoxy insulator. An insulating block is disposed on the conductive slider B, and the insulating block is connected to the slide of the reciprocating lead screw. The effective stroke of the reciprocating lead screw is the same as the effective stroke of the lead screw, and the pitch of the reciprocating lead screw is the same as the pitch of the lead screw.

[0016] Preferably, the transmission assembly includes pulley A, pulley B, and a toothed belt. Pulley A is coaxially connected to the lead screw, and pulley B is coaxially connected to the reciprocating lead screw. Pulley A and pulley B are connected by a toothed belt drive, and for every one rotation of pulley A, pulley B rotates two times.

[0017] Preferably, the vacuum tube includes an insulating shell, a stationary contact, and a moving contact. Both the stationary and moving contacts are located inside the insulating shell. The stationary contact is connected to cable B, and the moving contact is connected to a moving contact rod. The moving contact rod extends outside the insulating shell and is connected to the conductive slider B.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] By setting a limiting groove on the movable contact, a limiting block on the insulating seat inside the movable contact, and a tensioning component for abutting the conductive slider A and the movable contact on the side of the pentagonal contact, the rotating screw drives the insulating seat to slide back an appropriate distance while the movable contact is in contact with the pentagonal contact, thus maintaining the electrical connection between cable A and the movable contact. Simultaneously, this state also enables load-side tripping and standby. By setting a linkage structure between the screw and the reciprocating screw, the reciprocating screw rotates in tandem with the screw rotating, and their transmission ratio is 1:2. When the movable contact switches from contact with the pentagonal contact to contact with the grounding seat, the conductive slider B drives the movable contact to complete one tripping and closing operation. This combined structure allows the device to have three positions: operating, isolating, and grounding. This structure can switch between multiple positions using only one drive mechanism, making operation simple and response rapid. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the working station structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the isolated workstation state structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the grounding position structure of this utility model.

[0024] Reference numerals: 1. Chassis; 101. Tensioning assembly; 2. Epoxy insulator; 3. Plexicon contact; 31. Cable A; 4. Vacuum tube; 41. Cable B; 5. Conductive slide; 6. Conductive slider A; 7. Movable contact; 71. Limiting groove; 8. Insulating seat; 81. Limiting block; 9. Grounding seat; 10. Lead screw; 11. Worm gear; 12. Worm; 121. Crank; 13. Reciprocating lead screw; 14. Conductive slider B; 141. Insulating block; 15. Transmission assembly. Detailed Implementation

[0025] Example 1

[0026] like Figures 1-4As shown, this utility model proposes a high-voltage vacuum circuit breaker for mining, comprising a chassis 1, a conductive slide block 5, a grounding base 9, a linear drive assembly, a conductive slider B14, a reciprocating drive assembly, and a transmission assembly 15. An epoxy insulator 2 is mounted on the chassis 1. A perforated contact 3 and a vacuum tube 4 are disposed within the epoxy insulator 2. The perforated contact 3 is connected to a cable A31. The vacuum tube includes an insulating sleeve, a stationary contact, and a moving contact. Both the stationary and moving contacts are located within the insulating sleeve. The stationary contact is connected to the cable B, and the moving contact is connected to a moving contact rod. The conductive slide block 5 is disposed within the epoxy insulator 2. A conductive slider A6 is slidably mounted on the conductive slide block 5. The conductive slider A6 is connected to a movable contact 7, and an insulating base 8 is movably mounted on the movable contact 7. A tensioning assembly 101 is installed inside the epoxy insulator 2. The tensioning assembly includes a slide rod and a spring. The slide rod is connected to the inner wall of the epoxy insulator and is parallel to the conductive slide block 5. The slide rod passes through the conductive slider A6 and is slidably connected to it. An insulating washer is provided on the side of the conductive slider A6 away from the swivel contact 3. The spring is sleeved on the slide rod, and both ends of the spring abut against the insulating washer and the inner wall of the epoxy insulator 2, respectively. A limiting groove 71 is provided on the movable contact 7. An insulating seat 8 is slidably disposed in the limiting groove 71. A limiting block 81 is provided on the insulating seat 8. The limiting block 81 is inserted into the limiting groove 71 and is slidably connected to its inner wall. A grounding seat 9 is disposed inside the epoxy insulator 2. The movable contact 7 is located between the swivel contact 3 and the grounding seat 9. The linear drive assembly includes a motor, a lead screw 10, and a crank 121. The lead screw 10 is rotatably connected to both the housing 1 and the epoxy insulator 2. The lead screw 10 passes through the insulating base 8 and is helically connected to it. A worm gear 11 is coaxially mounted on the lead screw 10. A worm 12 is rotatably mounted on the housing 1, meshing with the worm gear 11. The crank 121 is connected to one end of the worm 12 extending outside the housing 1. The motor body is housed inside the housing 1, and the motor output end is connected to the end of the worm 12 furthest from the crank 121. A conductive slider B14 is slidably connected to a conductive slide block 5, and the conductive slider B14 is connected to one end of the moving contact rod extending out of the insulating sleeve. The reciprocating drive assembly includes a reciprocating lead screw 13, which is located within and rotatably connected to the epoxy insulator 2. An insulating block 141 is mounted on the conductive slider B14, and the insulating block 141 is connected to the sliding head of the reciprocating lead screw 13. The effective stroke of the reciprocating lead screw 13 is the same as that of the lead screw 10, and the pitch of the reciprocating lead screw 13 is the same as that of the lead screw 10. The transmission assembly 15 drives the linear drive assembly and the reciprocating drive assembly, and the transmission ratio between the linear drive assembly and the reciprocating drive assembly is 1:2.

[0027] This embodiment includes three working states: running working state, isolated working state, and grounded working state.

[0028] Operating status of the station: 1. The movable contact 7 abuts against the plum blossom contact 3, and the limiting block 81 abuts against the side of the limiting groove 71 near the plum blossom contact 3. At the same time, the movable contact in the vacuum tube 4 abuts against the stationary contact. Cable A is connected to cable B41 through the plum blossom contact 3, movable contact 7, conductive slider A6, conductive slide 5, conductive slider B14 and the vacuum tube 4 in the closed state.

[0029] 2. The drive crank 121 drives the worm gear 12 to rotate, and the rotation of the worm gear 12 drives the worm wheel 11 and the lead screw 10 to rotate, thereby causing the insulating seat 8 to slide away from the side of the plum blossom contact 3 until the limiting block 81 on the insulating seat 8 contacts the side of the limiting groove 71 away from the plum blossom contact 3. Due to the tension of the spring, the cable A31 remains connected to the moving contact 7. At this time, the reciprocating lead screw 13 rotates under the transmission action of the pulley and the toothed belt, and causes the conductive slider B14 to pull the moving contact in the vacuum tube 4 to move. The moving contact separates from the stationary contact, the load end connected to the cable B41 is disconnected, and the equipment is in standby mode.

[0030] Working status of the isolation station: When the equipment is in the open standby state, the drive screw 10 continues to rotate. The insulating seat 8 drives the movable contact 7 to move an appropriate distance toward one side of the insulating seat 9 through the contact relationship between the limit block 81 and the limit groove 71. At this distance, the movable contact 7 does not contact the plum blossom contact 3 or the insulating seat 9. Moreover, at this time, the conductive slider B14 keeps the moving contact and the stationary contact separated under the rotation of the reciprocating screw 13. The moving contact (isolating switch) maintains a distance from the right incoming power terminal and the left grounding terminal, leaving a safety break to ensure the safe distance of the isolation station equipment.

[0031] Grounding position working state: In the isolation position working state, the drive screw 10 continues to rotate until it can no longer rotate. At this time, the movable contact 7 abuts against the grounding base 9, and the conductive slider B14 just moves to the rightmost position again. The movable contact contacts the stationary contact. At this time, the load device corresponding to cable B41 is connected to the grounding base 9 through the stationary contact, movable contact, conductive slider B14, conductive slide base 5, conductive slider A6 and movable contact 7, so as to realize the grounding of the equipment load end and ensure the safety of equipment load end maintenance.

[0032] When the circuit breaker is in the grounding position, the vacuum circuit breaker is closed by controlling it. The load end is grounded through the three-phase vacuum tube arc extinguishing chamber. The grounding arc is introduced into the vacuum tube to extinguish the arc, which completely solves the problems of sparks and arcs caused by traditional grounding switches with exposed contacts and grounding in the air. It also completely solves the series of safety hazards caused by traditional grounding switches, which are mechanical and manual, making it difficult to control the contact time of the contacts, resulting in long contact time, long spark retention time, large sparks, and long arc extinguishing time.

[0033] Example 2

[0034] like Figures 2-4 As shown, the present invention discloses a specific structure of a transmission component 15 for a mining high-voltage vacuum circuit breaker, compared to embodiment one. The transmission component 15 includes a pulley A, a pulley B, and a toothed belt. The pulley A is coaxially connected to the lead screw 10, and the pulley B is coaxially connected to the reciprocating lead screw 13. The pulley A and the pulley B are connected by a toothed belt drive, and the pulley B rotates twice for every one revolution of the pulley A.

[0035] In this embodiment, the transmission of pulleys A, B, and C facilitates the disassembly and replacement of each separate structure. The lead screw 10 rotates and drives pulley A to rotate, which in turn drives pulley B and reciprocating lead screw 13 to rotate via the toothed belt. For every one rotation of lead screw 10, reciprocating lead screw 13 rotates two times, thereby enabling...

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A mine high-voltage vacuum circuit breaker, characterized by, The utility model relates to a kind of high-voltage switchgear, including Cabinet (1), epoxy insulator (2) is provided on cabinet (1), and wobbler contact (3) and vacuum tube (4) are provided in epoxy insulator (2), wobbler contact (3) is connected cable A (31), and the fixed end of vacuum tube (4) is connected cable B (41); Conductive slide (5) is provided in epoxy insulator (2), and conductive slide block A (6) is slidably arranged on conductive slide (5), and conductive slide block A (6) is connected movable contact (7), and movable contact (7) is movably arranged on insulating seat (8); Grounding seat (9) is provided in epoxy insulator (2), and movable contact (7) is located between wobbler contact (3) and grounding seat (9); Linear drive assembly is provided in epoxy insulator (2) and drives connection insulating seat (8); Conductive slide block B (14) is slidably connected with conductive slide (5), and conductive slide block B (14) is connected with the movable end of vacuum tube (4); Reciprocating drive assembly is provided in epoxy insulator (2) and drives connection conductive slide block B (14); And transmission assembly (15) is drivingly connected linear drive assembly and reciprocating drive assembly, and the transmission ratio of linear drive assembly and reciprocating drive assembly is one to two.

2. A high-voltage vacuum circuit breaker for mine use according to claim 1, characterized in that Tensioning assembly (101) is provided in epoxy insulator (2), and the tensioning assembly includes slide rod and spring, the slide rod is connected with the inner wall of epoxy insulator, the slide rod is parallel with conductive slide (5), and the slide rod penetrates conductive slide block A (6) and is slidably connected with it, and insulating washer is arranged on conductive slide block A (6) on the side away from wobbler contact (3), the spring is sleeved on the slide rod, and the two ends of the spring are respectively abutted with insulating washer and the inner wall of epoxy insulator (2).

3. The high-voltage vacuum circuit breaker for mine use according to claim 1, characterized in that, Limiting groove (71) is arranged on movable contact (7), and insulating seat (8) is slidably arranged in limiting groove (71), and limiting block (81) is arranged on insulating seat (8), and limiting block (81) is inserted into limiting groove (71) and is slidably connected with the inner wall thereof.

4. The high-voltage vacuum circuit breaker for mine use according to claim 1, characterized in that, Linear drive assembly includes lead screw (10) and crank (121), lead screw (10) is rotatably connected with cabinet (1) and epoxy insulator (2), lead screw (10) penetrates insulating seat (8) and is screw-connected with it, worm gear (11) is coaxially arranged on lead screw (10), and worm (12) is rotatably arranged on cabinet (1), worm (12) is engaged with worm gear (11), and crank (121) is connected with the end of worm (12) that extends outside cabinet (1).

5. A high-voltage vacuum circuit breaker for mine use according to claim 4, characterized in that Reciprocating drive assembly includes reciprocating lead screw (13), reciprocating lead screw (13) is located in epoxy insulator (2) and is rotatably connected with it, insulating block (141) is arranged on conductive slide block B (14), insulating block (141) is connected with the slide shuttle of reciprocating lead screw (13), the effective stroke of reciprocating lead screw (13) is same with the effective stroke of lead screw (10), and the pitch of reciprocating lead screw (13) is same with the pitch of lead screw (10).

6. A high-voltage vacuum circuit breaker for mine use according to claim 5, characterized in that The transmission assembly (15) comprises pulley A, pulley B and toothed belt, pulley A is coaxially connected with the screw rod (10), pulley B is coaxially connected with the reciprocating screw rod (13), pulley A and pulley B are drivingly connected through the toothed belt, and pulley B rotates two rounds for each round of pulley A.

7. The high-voltage vacuum circuit breaker for mine use according to claim 1, characterized in that, The vacuum tube comprises an insulating sleeve, a static contact and a dynamic contact, the static contact and the dynamic contact are located in the insulating sleeve, the static contact is connected with the cable B, the dynamic contact is connected with a dynamic contact rod, the dynamic contact rod extends outside the insulating sleeve and is connected with the conductive sliding block B (14).

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