A circuit breaker for armored removable AC metal-enclosed switch cabinet

Abstract

The invention discloses a circuit breaker for an armored removable AC metal-enclosed switch cabinet, which relates to the technical field of circuit breakers; the invention comprises an installation box installed inside the cabinet, a chamber is arranged on the installation box, a protective outer layer is arranged on the outer side of the chamber, a second wiring terminal is arranged on the top of the chamber, and a first wiring terminal is arranged on the bottom of the chamber; inside the chamber, a static contact is connected to the second wiring terminal, and a moving contact is slidably matched on the first wiring terminal; a maintenance mechanism is arranged on the outer side of the chamber; it is used to maintain the moving and static contacts; an execution rack is slidably arranged on the inner side of the installation box, which is used to execute closing and opening operations; the invention saves the tedious manual periodic maintenance operations, can clean and maintain the moving and static contacts after each opening, and has a stable state and high safety.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker for an armored removable AC metal-enclosed switch cabinet. Background Art

[0002] A circuit breaker is a commonly used switching device in an electric circuit, which can close, carry and disconnect the current under normal circuit conditions. Circuit breakers can be seen in both high-voltage and low-voltage circuits to protect against accidents. In addition, there will also be circuit breakers in switch cabinets to facilitate circuit control. The current operating principle of circuit breakers is generally to complete the closing and opening operations through the contact and separation of moving and static contacts. The moving contacts are controlled by a series of actuators. During the long-term contact and separation process of the moving and static contacts, some metal particles and dust will adhere to the contacts due to the high temperature during operation. Therefore, the circuit breaker needs to be periodically maintained, but the current maintenance method is generally to disassemble the circuit breaker and then perform internal maintenance, which is inefficient and cumbersome to operate. Based on this, the present invention proposes a circuit breaker for a switch cabinet, which eliminates the cumbersome manual periodic maintenance operations, can clean and maintain the moving and static contacts after each opening, and has a stable state and high safety. Summary of the invention

[0003] In view of the above technical problems, the present invention saves the tedious manual periodic maintenance operations, can clean and maintain the moving and static contacts after each opening of the switch, and has a stable state and high safety.

[0004] The scheme used in the present invention is: a circuit breaker for an armored removable AC metal-enclosed switch cabinet, comprising an installation box installed inside the cabinet, a chamber is arranged on the installation box, a protective outer layer is arranged on the outside of the chamber, a second wiring terminal is arranged on the top of the chamber, and a first wiring terminal is arranged on the bottom of the chamber; inside the chamber, a static contact is connected to the second wiring terminal, and a moving contact is slidably matched on the first wiring terminal; a maintenance mechanism is arranged on the outside of the chamber; the maintenance mechanism comprises a connecting maintenance pipe connected to the chamber, a blocking sliding column is slidably arranged on the connecting maintenance pipe, and a blocking sliding column is slidably arranged on the connecting maintenance pipe. A telescopic control electric cylinder is arranged inside, and maintenance and cleaning parts are arranged on the telescopic rods at both ends of the telescopic control electric cylinder, which are used to clean and maintain the contact ends of the moving contact and the static contact; an execution slide bar is arranged at the bottom end of the moving contact, and a roller is arranged at the end of the execution slide bar; an execution rack is slidingly arranged on the inner side of the installation box, and an execution inclined seat is fixedly arranged on the execution rack, and a fixed shaft is arranged at one end of the execution inclined seat, and the fixed shaft is used to fix the execution slide bar; a fixing mechanism is arranged on the inner side of the installation box for fixing the execution rack; a reset mechanism is arranged on the inner side of the installation box for driving the execution rack.

[0005] Preferably, the maintenance mechanism includes a sealing tube arranged on the connecting maintenance tube, the blocking slide column is slidably fitted inside the sealing tube, and a sealing control electric cylinder is arranged on the mounting box, the sealing control electric cylinder is used to control the movement of the blocking slide column to convert the connection state between the connecting maintenance tube and the chamber.

[0006] Preferably, the maintenance mechanism also includes a maintenance control electric cylinder fixedly arranged on the connected maintenance tube, the telescopic control electric cylinder is rotatably installed on the telescopic rod of the maintenance control electric cylinder, and a drive motor is fixedly arranged on the telescopic rod of the maintenance control electric cylinder, and a belt structure is arranged on the output shaft of the drive motor for driving the telescopic control electric cylinder; the chamber is in a connected state with the connected maintenance tube, and the maintenance cleaning part enters the interior of the chamber to perform maintenance processing.

[0007] Preferably, a spring 1 for providing elastic force is sleeved on the execution slide rod, and the two ends of the spring 1 are respectively connected to the inner side of the installation box and the bottom end of the execution slide rod. A fixing hole is opened at the bottom end of the execution slide rod, and the fixing hole is docked with the fixed shaft for fixation.

[0008] Preferably, a fixed slide is provided on the executing inclined seat, a fixed shaft is provided on the fixed slide, the roller is pushed by the executing inclined seat, and the roller moves on the executing inclined seat to make the executing slide bar move up and down; the roller moves at the horizontal end of the fixed slide for fixing.

[0009] Preferably, a spring 2 for providing elastic force is connected between the fixed slide plate and the side of the mounting box; a fixed buckle seat is provided on the side of the execution bevel seat, and the fixed buckle seat is engaged with the fixing mechanism to fix the execution bevel seat and the execution rack.

[0010] Preferably, the fixing mechanism includes two fixed slides slidably installed on both sides of the executing inclined seat, and a fixed snap-fit ​​seat is slidably arranged on the fixed slide, and a snap-fit ​​spring for providing elastic force is connected between the fixed snap-fit ​​seat and the fixed slide; the fixed snap-fit ​​seat is snapped with the fixed snap-fit ​​seat to fix the executing inclined seat and the executing rack.

[0011] Preferably, the fixing mechanism also includes a releasing inclined portion arranged at one end of the fixed slide, a spring three for providing elastic force is connected between the releasing inclined portions on the two fixed slides, a tripping electric cylinder is arranged at the bottom of the installation box, a pushing wheel is arranged on the telescopic rod of the tripping electric cylinder, and the pushing wheel pushes the releasing inclined portion to move the fixed slide.

[0012] Preferably, the reset mechanism includes a reset motor fixedly arranged on the side of the installation box, and a reset shaft rotatably arranged on the inner side of the installation box, and the reset shaft is driven by the reset motor; an electromagnetic chuck is arranged on the reset shaft, and a reset gear is rotatably arranged on the inner side of the installation box, the reset gear and the execution rack form a gear pair, and the electromagnetic chuck is located on the inner side of the reset gear, and the electromagnetic chuck supports and fixes the reset gear so that the reset shaft and the reset gear rotate synchronously.

[0013] Compared with the prior art, the present invention has the following advantages: (1) In the present invention, when opening the switch, the actuator seat moves, the roller moves on the actuator seat, and then the actuator slide bar also performs a catapult movement under the elastic force of spring 1, so that the moving contact and the static contact are quickly separated, and the opening operation is completed, the response is fast and quick, and the subsequent reset is convenient; (2) In the present invention, the actuator rack and the actuator seat move, and the roller moves on the horizontal end of the fixed slide plate, and the fixed shaft and the fixed hole are docked to fix the actuator slide bar, that is, the opening state is stabilized, which is also beneficial to subsequent maintenance operations; (3) In the present invention, the connecting maintenance pipe and the chamber are connected, the maintenance cleaning part moves to the inside of the chamber, and the telescopic control electric cylinder controls the movement of the maintenance cleaning parts at both ends, that is, the maintenance cleaning part contacts the ends of the static contact and the moving contact, and the maintenance cleaning part removes the metal particles and dust attached to the ends of the static contact and the moving contact, thereby eliminating manual maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall installation structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure on the installation box of the present invention.

[0016] Figure 3 It is a schematic diagram of the installation structure of the chamber of the present invention.

[0017] Figure 4 It is a schematic diagram of the installation structure of the chamber and the maintenance mechanism of the present invention.

[0018] Figure 5 Schematic diagram of the internal structure of the chamber of the present invention.

[0019] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of the area marked with A in the middle.

[0020] Figure 7 This is a schematic diagram of the inclined seat structure of the present invention.

[0021] Figure 8 It is a structural schematic diagram of the fixing mechanism of the present invention.

[0022] Fig. 9 It is a structural schematic diagram of the reset mechanism of the present invention.

[0023] Figure markings: 1-cabinet; 2-installation box; 3-reset motor; 4-protective outer layer; 5-terminal one; 6-terminal two; 7-chamber; 8-connecting maintenance tube; 9-sealing tube; 10-sealed control electric cylinder; 11-blocking slide column; 12-static contact; 13-moving contact; 14-maintenance control electric cylinder; 15-execution slide rod; 16-spring one; 17-roller; 18-fixing hole; 19-maintenance cleaning part; 20-drive motor; 21-telescopic control electric cylinder; 22-execution rack; 23-execution inclined seat; 24-fixed buckle seat; 25-fixed buckle seat; 26-buckle spring; 27-fixed slide; 28-release inclined part; 29-fixed slide plate; 30-fixed shaft; 31-spring two; 32-spring three; 33-reset shaft; 34-reset gear; 35-electromagnetic clamp; 36-disconnection electric cylinder; 37-pushing wheel. DETAILED DESCRIPTION

[0024] Example: Figures 1 to 9 As shown, an installation box 2 is provided inside the cabinet 1, a chamber 7 is provided on the installation box 2, a protective outer layer 4 is provided on the outside of the chamber 7, a wiring terminal 2 6 is provided at the top of the chamber 7, and a wiring terminal 1 5 is provided at the bottom of the chamber 7; inside the chamber 7, a static contact 12 is connected to the wiring terminal 2 6, and a moving contact 13 is slidably fitted on the wiring terminal 1 5.

[0025] A maintenance mechanism is arranged outside the chamber 7, and the maintenance mechanism includes a connecting maintenance pipe 8 connected to the chamber 7, a blocking slide post 11 is slidably arranged on the connecting maintenance pipe 8, and a telescopic control electric cylinder 21 is arranged inside the connecting maintenance pipe 8, and a maintenance cleaning part 19 is arranged on the telescopic rods at both ends of the telescopic control electric cylinder 21, which is used to clean and maintain the contact ends of the moving contact 13 and the static contact 12; the maintenance mechanism also includes a sealing pipe 9 arranged on the connecting maintenance pipe 8, the blocking slide post 11 is slidably fitted inside the sealing pipe 9, and a sealing control electric cylinder 10 is arranged on the mounting box 2, and the sealing control The control cylinder 10 is used to control the movement of the blocking slide column 11 to change the connection state between the connected maintenance tube 8 and the chamber 7; the maintenance mechanism also includes a maintenance control electric cylinder 14 fixedly arranged on the connected maintenance tube 8, and the telescopic control electric cylinder 21 is rotatably installed on the telescopic rod of the maintenance control electric cylinder 14, and a drive motor 20 is fixedly arranged on the telescopic rod of the maintenance control electric cylinder 14, and a belt structure is arranged on the output shaft of the drive motor 20 for driving the telescopic control electric cylinder 21; the chamber 7 is in a connected state with the connected maintenance tube 8, and the maintenance cleaning part 19 enters the interior of the chamber 7 to perform maintenance processing.

[0026] An execution slide bar 15 is arranged at the bottom end of the moving contact 13, and a roller 17 is arranged at the end of the execution slide bar 15; an execution rack 22 is slidingly arranged on the inner side of the installation box 2, and an execution bevel seat 23 is fixedly arranged on the execution rack 22, and a fixed shaft 30 is arranged at one end of the execution bevel seat 23, and the fixed shaft 30 is used to fix the execution slide bar 15; a fixing mechanism is arranged on the inner side of the installation box 2 for fixing the execution rack 22; a reset mechanism is arranged on the inner side of the installation box 2 for driving the execution rack 22.

[0027] A spring 16 for providing elastic force is sleeved on the execution slide bar 15, and the two ends of the spring 16 are respectively connected to the inner side of the installation box 2 and the bottom end of the execution slide bar 15. A fixing hole 18 is opened at the bottom end of the execution slide bar 15, and the fixing hole 18 is docked with the fixed shaft 30 for fixation; a fixed slide plate 29 is arranged on the execution inclined seat 23, and the fixed shaft 30 is arranged on the fixed slide plate 29. The roller 17 is pushed by the execution inclined seat 23, and the roller 17 moves on the execution inclined seat 23 to make the execution slide bar 15 move up and down; the roller 17 moves on the horizontal end of the fixed slide plate 29 for fixation; a spring 2 31 for providing elastic force is connected between the fixed slide plate 29 and the side of the installation box 2; a fixed buckle seat 24 is arranged on the side of the execution inclined seat 23, and the fixed buckle seat 24 is buckled with the fixing mechanism to fix the execution inclined seat 23 and the execution rack 22.

[0028] The fixing mechanism includes two fixed slides 27 slidably installed on both sides of the executing inclined seat 23, and a fixed snap-fit ​​seat 25 is slidably arranged on the fixed slide 27, and a snap-fit ​​spring 26 for providing elastic force is connected between the fixed snap-fit ​​seat 25 and the fixed slide 27; the fixed snap-fit ​​seat 25 is snapped with the fixed snap-fit ​​seat 24 to fix the executing inclined seat 23 and the executing rack 22; the fixing mechanism also includes a release inclined portion 28 arranged at one end of the fixed slide 27, and a spring three 32 for providing elastic force is connected between the release inclined portions 28 on the two fixed slides 27, and a tripping electric cylinder 36 is arranged at the bottom of the mounting box 2, and a pushing wheel 37 is arranged on the telescopic rod of the tripping electric cylinder 36, and the pushing wheel 37 pushes the release inclined portion 28 to move the fixed slide 27.

[0029] The reset mechanism includes a reset motor 3 fixedly arranged on the side of the installation box 2, and a reset shaft 33 rotatably arranged on the inner side of the installation box 2, and the reset shaft 33 is driven by the reset motor 3; an electromagnetic chuck 35 is arranged on the reset shaft 33, and an electromagnetic slide is arranged on the electromagnetic chuck 35, which can slide radially, and a reset gear 34 is rotatably arranged on the inner side of the installation box 2, and the reset gear 34 and the execution rack 22 form a gear pair, and the electromagnetic chuck 35 is located on the inner side of the reset gear 34, and the electromagnetic chuck 35 supports and fixes the reset gear 34 so that the reset shaft 33 and the reset gear 34 rotate synchronously.

[0030] The principles for carrying out the present invention are as follows:

[0031] In the closed state, the ends of the static contact 12 and the moving contact 13 are in contact; when the switch needs to be opened, the control system issues an opening command, and the opening cylinder 36 controls the push wheel 37 to move, and the push wheel 37 pushes the release inclined portion 28 to move the fixed slide 27, and the fixed slide 27 moves in a direction away from the execution inclined seat 23, so that the fixed buckle seat 25 is disengaged from the fixed buckle seat 24, and the execution inclined seat 23, the execution rack 22 and the fixed slide plate 29 are ejected under the elastic force of the spring 2 31 (when the switch is closed, the spring 2 31 is in a compressed state and has elastic potential energy stored); as the execution inclined seat 23 moves, the roller 17 moves on the execution inclined seat 23. The moving contact 13 is moved, and then the executing slide bar 15 is also ejected under the elastic force of the spring 16, so that the moving contact 13 is quickly separated from the static contact 12, and the opening operation is completed (it should be noted that for arc extinguishing, sulfur hexafluoride gas is used for arc extinguishing, that is, the operator sets an external inflation device to transport sulfur hexafluoride into the chamber 7, which is omitted in this embodiment); further, the executing rack 22 and the executing inclined seat 23 continue to move, and the roller 17 moves on the horizontal end of the fixed slide plate 29, that is, the height of the executing slide bar 15 no longer changes, and the fixed shaft 30 is docked with the fixed hole 18 to fix the executing slide bar 15, that is, the opening state is stabilized, which is also conducive to subsequent maintenance operations.

[0032] Furthermore, during maintenance, the sealing control electric cylinder 10 controls the movement of the blocking sliding column 11, even if the connecting maintenance pipe 8 and the chamber 7 are in a connected state, the maintenance cleaning part 19 is controlled by the maintenance control electric cylinder 14 to move into the chamber 7, and the telescopic control electric cylinder 21 controls the movement of the maintenance cleaning part 19 at both ends, that is, the maintenance cleaning part 19 contacts the ends of the static contact 12 and the moving contact 13, and the maintenance cleaning part 19 is rotated by driving the motor 20, and the maintenance cleaning part 19 removes the metal particles and dust attached to the ends of the static contact 12 and the moving contact 13.

[0033] When closing the circuit breaker, the reset motor 3 works, the reset shaft 33 rotates, and the electromagnetic chuck 35 supports and fixes the reset gear 34 from the inner side of the reset gear 34, that is, the reset gear 34 is driven to rotate synchronously (when opening the circuit breaker, the execution rack 22 moves, and the reset gear 34 rotates alone, that is, the electromagnetic chuck 35 does not support and fix the reset gear 34). Under the gear transmission, the execution rack 22 and the execution bevel seat 23 move, and the fixed shaft 30 first disengages from the fixed hole 18, and then the roller 17 moves on the execution bevel seat 23, so that the execution slide rod 15 moves up and down, so that the moving contact 13 contacts the static contact 12, and the closing of the circuit breaker is completed; further, the fixed buckle seat 24 contacts the fixed buckle seat 25, that is, the buckle is completed to fix the execution rack 22 and the execution bevel seat 23.

Claims

1. A circuit breaker for an armored removable AC metal-enclosed switch cabinet, comprising an installation box (2) installed inside a cabinet (1), the installation box (2) being provided with a chamber (7), the outer side of the chamber (7) being provided with a protective outer layer (4), the top of the chamber (7) being provided with a second wiring terminal (6), and the bottom of the chamber (7) being provided with a first wiring terminal (5); inside the chamber (7), the second wiring terminal (6) being connected with a stationary contact (12), and the first wiring terminal (5) being slidably fitted with a moving contact (13); the characteristics are as follows: A maintenance mechanism is arranged outside the chamber (7); the maintenance mechanism comprises a connecting maintenance pipe (8) connected to the chamber (7); a blocking slide column (11) is slidably arranged on the connecting maintenance pipe (8); a telescopic control electric cylinder (21) is arranged inside the connecting maintenance pipe (8); maintenance cleaning parts (19) are arranged on telescopic rods at both ends of the telescopic control electric cylinder (21) for cleaning and maintaining the contact ends of the moving contact (13) and the stationary contact (12); an execution slide rod (15) is arranged at the bottom end of the moving contact (13) , a roller (17) is provided at the end of the execution slide bar (15); an execution rack (22) is slidably provided on the inner side of the installation box (2), an execution inclined seat (23) is fixedly provided on the execution rack (22), a fixed shaft (30) is provided at one end of the execution inclined seat (23), and the fixed shaft (30) is used to fix the execution slide bar (15); a fixing mechanism is provided on the inner side of the installation box (2) for fixing the execution rack (22); a reset mechanism is provided on the inner side of the installation box (2) for driving the execution rack (22); The execution slide bar (15) is sleeved with a spring (16) for providing elastic force, and the two ends of the spring (16) are respectively connected to the inner side of the installation box (2) and the bottom end of the execution slide bar (15). A fixing hole (18) is opened at the bottom end of the execution slide bar (15), and the fixing hole (18) is docked with the fixing shaft (30) for fixing; The execution inclined seat (23) is provided with a fixed slide plate (29), the fixed shaft (30) is provided on the fixed slide plate (29), the roller (17) is pushed by the execution inclined seat (23), and the roller (17) moves on the execution inclined seat (23) to make the execution slide bar (15) move up and down; the roller (17) moves at the horizontal end of the fixed slide plate (29) to fix it; A second spring (31) for providing elastic force is connected between the fixed slide plate (29) and the side of the installation box (2); a fixed buckle seat (24) is provided on the side of the execution inclined seat (23); the fixed buckle seat (24) is engaged with the fixing mechanism to fix the execution inclined seat (23) and the execution rack (22); The fixing mechanism comprises two fixed slides (27) slidably mounted on both sides of the executing inclined seat (23); a fixed buckling seat (25) is slidably arranged on the fixed slide (27); a buckling spring (26) for providing elastic force is connected between the fixed buckling seat (25) and the fixed slide (27); the fixed buckling seat (25) is buckled with the fixed buckling seat (24) to fix the executing inclined seat (23) and the executing rack (22).

2. The circuit breaker for an armored removable AC metal-enclosed switch cabinet according to claim 1, characterized in that: The maintenance mechanism comprises a sealing tube (9) arranged on the connecting maintenance tube (8), a blocking slide column (11) slidingly fitted inside the sealing tube (9), and a sealing control electric cylinder (10) is arranged on the mounting box (2), the sealing control electric cylinder (10) being used to control the movement of the blocking slide column (11) to switch the connection state between the connecting maintenance tube (8) and the chamber (7).

3. The circuit breaker for an armored removable AC metal-enclosed switch cabinet according to claim 2, characterized in that: The maintenance mechanism further comprises a maintenance control electric cylinder (14) fixedly arranged on the connected maintenance pipe (8); the telescopic control electric cylinder (21) is rotatably mounted on the telescopic rod of the maintenance control electric cylinder (14); a drive motor (20) is fixedly arranged on the telescopic rod of the maintenance control electric cylinder (14); a belt structure is arranged on the output shaft of the drive motor (20) for driving the telescopic control electric cylinder (21); the chamber (7) is in a connected state with the connected maintenance pipe (8); and the maintenance cleaning unit (19) enters the interior of the chamber (7) to perform maintenance processing.

4. The circuit breaker for an armored removable AC metal-enclosed switch cabinet according to claim 1, characterized in that: The fixing mechanism further comprises a release inclined portion (28) arranged at one end of the fixed slide (27); a spring three (32) for providing elastic force is connected between the release inclined portions (28) on the two fixed slides (27); a switch-off electric cylinder (36) is arranged at the bottom of the installation box (2); a push wheel (37) is arranged on the telescopic rod of the switch-off electric cylinder (36); the push wheel (37) pushes the release inclined portion (28) to move the fixed slide (27).

5. The circuit breaker for an armored removable AC metal-enclosed switch cabinet according to claim 1, characterized in that: The reset mechanism comprises a reset motor (3) fixedly arranged on the side of the installation box (2), and a reset shaft (33) rotatably arranged inside the installation box (2), the reset shaft (33) being driven by the reset motor (3); an electromagnetic chuck (35) is arranged on the reset shaft (33), and a reset gear (34) is rotatably arranged inside the installation box (2), the reset gear (34) and the execution rack (22) forming a gear pair, and the electromagnetic chuck (35) is located inside the reset gear (34), and the electromagnetic chuck (35) supports and fixes the reset gear (34), so that the reset shaft (33) and the reset gear (34) rotate synchronously.

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