Three-in-one high-voltage vacuum circuit breaker

Abstract

The utility model relates to a three-in-one high-voltage vacuum circuit breaker. The technical problem to be solved by the utility model is to provide a three-in-one high-voltage vacuum circuit breaker. According to the technical scheme, the circuit breaker comprises a circuit breaker frame, an operation shaft assembly and a pressing device, the operation shaft assembly comprises an operation shaft, a spacing sleeve, an action arm assembly and a driving block assembly, and the driving block assembly comprises a swing piece and a driving block; the pressing device comprises a spring seat, an end cover, a pressing rod, a pressing spring and a butt joint, the pressing spring is arranged on the butt joint portion of the pressing rod in a sleeving mode, the upper end of the pressing spring abuts against the lower portion of the pressing rod positioning boss, and the lower end of the pressing spring abuts against the interior of the spring seat. The three-in-one high-voltage vacuum circuit breaker provided by the utility model has the advantages that the pressing device can enable the operation shaft assembly not to be liable to malfunction through the pretightening force of the internal spring when the vacuum circuit breaker is in a switch-on state, enables the contact to be stable and reliable, and is higher in safety.

Description

Technical Field

[0001] The utility model relates to a three-in-one high-voltage vacuum circuit breaker. Background Art

[0002] A three-in-one high-voltage vacuum circuit breaker, also known as a three-position vacuum circuit breaker, is an electrical device that integrates an isolating switch, a vacuum circuit breaker, and a grounding switch. A three-in-one high-voltage vacuum circuit breaker generally includes a circuit breaker frame, three groups of vacuum circuit breakers installed on the circuit breaker frame in a three-phase distribution manner, an isolating switch, and an operating shaft assembly installed on one side of the circuit breaker frame for operating the isolating switch and the vacuum circuit breaker. The existing three-in-one high-voltage vacuum circuit breaker can only simultaneously control the connection and disconnection of the vacuum circuit breaker through the operating shaft assembly, and cannot guarantee the contact stability after the vacuum circuit breaker is connected and the ability to prevent misoperation of the operating shaft due to external factors such as vibration. Its safety is relatively low, and further improvements are made in this regard. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a three-in-one high-voltage vacuum circuit breaker.

[0004] The technical solution adopted by the three-in-one high-voltage vacuum circuit breaker of the utility model: comprising a circuit breaker frame and an operating shaft assembly penetrated on the circuit breaker frame, characterized in that it also comprises a clamping device fixed on the circuit breaker frame, the operating shaft assembly comprises an operating shaft, a spacing sleeve, an action arm assembly sleeved on the operating shaft at intervals and used for connecting or disconnecting the vacuum circuit breaker, and a driving block assembly, the driving block assembly comprises a swinging piece sleeved on the operating shaft, and a driving block fixed between two swinging pieces through a driving block connecting shaft;

[0005] The clamping device includes a spring seat installed on the circuit breaker frame, an end cover covered on the spring seat, a clamping rod movable up and down in the spring seat, a clamping spring, and a butt joint fixed to the upper end of the clamping rod. The clamping rod includes a clamping rod body, a clamping rod positioning boss and a clamping rod butt joint arranged in sequence from top to bottom. The clamping spring is sleeved on the clamping rod butt joint and its upper end abuts against the lower part of the clamping rod positioning boss and its lower end abuts against the spring seat. The butt joint and the driving block are connected by a pin.

[0006] The butt joint is provided with a butt joint positioning hole for butting with the upper end of the pressing rod body, the butt joint comprises a butt joint body and a butt joint plate provided at the lower end of the butt joint body, the butt joint plate is provided with a butt joint plate plug block, and the butt joint plate plug block is provided with a plug block butt joint hole;

[0007] The driving block is provided with a driving block square portion, the driving block square portion is provided with a driving block limiting groove for inserting the docking plate plug block, the driving block square portion is provided with a driving block docking hole that vertically penetrates and communicates with the plug block docking hole, and the plug block docking hole and the driving block docking hole are connected by the pin.

[0008] The operating shaft includes a shaft body and shaft limiting protrusions spaced around the shaft body, the swinging member is provided with a swinging member through hole corresponding to the shaft body, and the swinging member through hole is provided with swinging member limiting recesses spaced around an arc and corresponding to the shaft limiting protrusions.

[0009] The butt joint body is provided with a transversely arranged butt joint fixing hole, the clamping rod body is provided with a clamping rod connecting hole communicated with the butt joint fixing hole, and the butt joint fixing hole and the clamping rod connecting hole are connected by a second pin.

[0010] The pressing device also includes a height adjustment plate disposed between the bottom of the spring seat and the circuit breaker frame.

[0011] The clamping device further comprises a buffer pad, which is sleeved on the clamping rod body and placed between the end cover and the butt joint.

[0012] The number of the pins is 2.

[0013] The advantage of the three-in-one high-voltage vacuum circuit breaker of the utility model is that the clamping device can prevent the operating shaft assembly from malfunctioning through the preload force of the internal spring when the vacuum circuit breaker is connected, and at the same time make the contact stable and reliable, so the safety is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a structural schematic diagram of the three-in-one high-voltage vacuum circuit breaker of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the operating shaft assembly of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the driving block assembly of the utility model;

[0018] Figure 4 It is an exploded view of the clamping device of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the compacting rod of the utility model;

[0020] Figure 6It is a structural schematic diagram of the utility model butt joint;

[0021] Figure 7 It is a structural schematic diagram of the driving block of the utility model;

[0022] Figure 8 It is a structural schematic diagram of the operating shaft of the utility model. DETAILED DESCRIPTION

[0023] like Figure 1-8 As shown, the three-in-one high-voltage vacuum circuit breaker involved in the utility model comprises a circuit breaker frame 1 and an operating shaft assembly 2 inserted into the circuit breaker frame 1, and a clamping device 3 fixed to the circuit breaker frame 1, wherein the operating shaft assembly 2 comprises an operating shaft 5, a spacing sleeve 6, an action arm assembly 7 sleeved on the operating shaft 5 at intervals and used for connecting or disconnecting the vacuum circuit breaker, and a driving block assembly 8, wherein the driving block assembly 8 comprises a swinging member 10 sleeved on the operating shaft 5, and a driving block 11 fixed between the two swinging members 10 through a driving block connecting shaft 12; the clamping device 3 comprises a spring seat 14 installed on the circuit breaker frame 1, and an end cover 15 covered on the spring seat 14. , a clamping rod 16 that can move up and down in the spring seat 14, a clamping spring 17, and a docking joint 18 fixed at the upper end of the clamping rod 16. The clamping rod 16 includes a clamping rod body 21, a clamping rod positioning boss 22 and a clamping rod docking portion 23 arranged in sequence from top to bottom. The clamping spring 17 is sleeved on the clamping rod docking portion 23 and its upper end abuts against the lower part of the clamping rod positioning boss 22, and its lower end abuts against the spring seat 14. The docking joint 18 and the driving block 11 are connected by a pin 19. The clamping device 3 can make the operating shaft 5 not prone to malfunction and at the same time make the contact stable and reliable through the pre-tightening force of the clamping spring 17 when the vacuum circuit breaker is connected, and the safety is higher.

[0024] The docking joint 18 is provided with a docking joint positioning hole 25 that docks with the upper end of the clamping rod body 21. The docking joint 18 includes a docking joint body 26 and a docking plate 27 provided at the lower end of the docking joint body 26. The docking plate 27 is provided with a docking plate plug block 28, and the docking plate plug block 28 is provided with a plug block docking hole 29; the driving block 11 is provided with a driving block square portion 31, and the driving block square portion 31 is provided with a driving block limiting groove 32 for inserting the docking plate plug block 28. The driving block square portion 31 is provided with a driving block docking hole 33 that vertically penetrates and communicates with the plug block docking hole 29. The plug block docking hole 29 and the driving block docking hole 33 are connected by the pin 19, have multiple positioning limits, and the docking connection is tight and firm, and the action consistency is high.

[0025] The operating shaft 5 includes a shaft body 35 and shaft limiting protrusions 36 arranged at intervals around the shaft body 35. The swing member 10 is provided with a swing member through hole 37 corresponding to the shaft body 35. The swing member through hole 37 is provided with swing member limiting recesses 38 corresponding to the shaft limiting protrusions 36 at intervals around an arc, so the operation is reliable.

[0026] The docking joint body 26 is provided with a transversely arranged docking joint fixing hole 40, and the clamping rod body 21 is provided with a clamping rod connecting hole 41 communicated with the docking joint fixing hole 40. The docking joint fixing hole 40 and the clamping rod connecting hole 41 are connected by a second pin 42, and the connection is firm and convenient for later maintenance.

[0027] The pressing device 3 further comprises a height adjustment plate 20 disposed between the bottom of the spring seat 14 and the circuit breaker frame 1, which can flexibly adjust the height and is more convenient to use.

[0028] The clamping device 3 further comprises a buffer pad 44, which is sleeved on the clamping rod body 21 and disposed between the end cover 15 and the docking head 18 to prevent damage caused by excessive impact during operation.

[0029] The number of the pins 19 is 2, the connection is firm and the movement is smooth.

[0030] Working principle: The compression spring 17 is pre-tightened and then installed in the spring seat 14. The operating shaft 5 rotates to turn on the vacuum circuit breaker. The swinging piece 10 sleeved on the operating shaft 5 causes the driving block 11 to drive the docking joint 18 to move upward. The compression rod 16 moves upward at the same time, and the compression spring 17 releases the pre-tightening force. When the rotating shaft 5 stops rotating, the compression spring 17 continues to give an upward force to the docking joint 18, making it difficult for the docking joint 18 to fall and the operating shaft 5 to malfunction, making the contact stable and reliable, and having higher safety.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A three-in-one high-voltage vacuum circuit breaker, comprising a circuit breaker frame (1) and an operating shaft assembly (2) inserted through the circuit breaker frame (1), characterized in that: It also comprises a clamping device (3) fixed on the circuit breaker frame (1), the operating shaft assembly (2) comprising an operating shaft (5), a spacing sleeve (6), an action arm assembly (7) sleeved on the operating shaft (5) at intervals and used for connecting or disconnecting the vacuum circuit breaker, and a driving block assembly (8), the driving block assembly (8) comprising a swinging member (10) sleeved on the operating shaft (5), and a driving block (11) fixed between two swinging members (10) via a driving block connecting shaft (12); The clamping device (3) comprises a spring seat (14) mounted on the circuit breaker frame (1), an end cover (15) covering the spring seat (14), a clamping rod (16) movable up and down in the spring seat (14), a clamping spring (17), and a butt joint (18) fixed to the upper end of the clamping rod (16); the clamping rod (16) comprises a clamping rod body (21), a clamping rod positioning boss (22) and a clamping rod butt joint (23) arranged in sequence from top to bottom; the clamping spring (17) is sleeved on the clamping rod butt joint (23) and its upper end abuts against the lower part of the clamping rod positioning boss (22) and its lower end abuts against the spring seat (14); the butt joint (18) and the driving block (11) are connected by a pin (19).

2. The three-in-one high-voltage vacuum circuit breaker according to claim 1, characterized in that: The butt joint (18) is provided with a butt joint positioning hole (25) for butting with the upper end of the pressing rod body (21); the butt joint (18) comprises a butt joint body (26) and a butt joint plate (27) provided at the lower end of the butt joint body (26); a butt joint plate plug (28) is provided on the butt joint plate (27); and a plug butt hole (29) is provided on the butt joint plug (28); The driving block (11) is provided with a driving block square portion (31), the driving block square portion (31) is provided with a driving block limiting groove (32) for inserting the docking plate plug block (28), the driving block square portion (31) is provided with a driving block docking hole (33) vertically penetrating and communicating with the plug block docking hole (29), and the plug block docking hole (29) and the driving block docking hole (33) are connected via the pin (19).

3. The three-in-one high-voltage vacuum circuit breaker according to claim 1, characterized in that: The operating shaft (5) comprises a shaft body (35) and shaft limiting protrusions (36) arranged at intervals around the shaft body (35); the swing member (10) is provided with a swing member through hole (37) corresponding to the shaft body (35); and the swing member through hole (37) is provided with swing member limiting recesses (38) corresponding to the shaft limiting protrusions (36) at intervals around a circular arc.

4. The three-in-one high-voltage vacuum circuit breaker according to claim 2, characterized in that: The butt joint body (26) is provided with a transversely arranged butt joint fixing hole (40), the clamping rod body (21) is provided with a clamping rod connecting hole (41) communicating with the butt joint fixing hole (40), and the butt joint fixing hole (40) and the clamping rod connecting hole (41) are connected via a second pin (42).

5. The three-in-one high-voltage vacuum circuit breaker according to claim 1, characterized in that: The pressing device (3) further comprises a height adjustment plate (20) disposed between the bottom of the spring seat (14) and the circuit breaker frame (1).

6. The three-in-one high-voltage vacuum circuit breaker according to claim 1, characterized in that: The pressing device (3) further comprises a buffer pad (44), wherein the buffer pad (44) is sleeved on the pressing rod body (21) and is disposed between the end cover (15) and the butt joint (18).

7. The three-in-one high-voltage vacuum circuit breaker according to claim 1, characterized in that: The number of the pins (19) is 2.

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