Indoor high-voltage alternating-current vacuum circuit breaker

Abstract

The utility model relates to an indoor high-voltage alternating-current vacuum circuit breaker which comprises a circuit breaker body, and an auxiliary top plate is arranged on the circuit breaker and used for abutting against a microswitch in a cabinet body. According to the application, the position of the circuit breaker is monitored through the auxiliary switch at the bottom of the chassis truck, and the position of the circuit breaker is monitored through the auxiliary top plate arranged on the sealing plate, so that the monitoring system obtains double guarantee, and even if the auxiliary switch on the chassis truck breaks down or is damaged, the auxiliary top plate can be used for monitoring; and the monitoring reliability and stability are improved.

Description

Technical Field

[0001] This application relates to the field of circuit breakers, and more particularly to an indoor high-voltage AC vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers use high vacuum as both the arc-extinguishing medium and the insulating medium in the contact gap after arc extinguishing. They offer advantages such as small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing, making them widely used in power distribution networks. Indoor high-voltage AC vacuum circuit breakers are widely used in 12kV three-phase power systems, often paired with armored metal-enclosed switchgear. They serve as protection and control units for power grid equipment and power equipment in industrial and mining enterprises, allowing for frequent operation and possessing the capability for multiple interruptions and rapid reclosing.

[0003] Traditional indoor high-voltage AC vacuum circuit breakers include a chassis vehicle. The mobile chassis vehicle can push or pull the circuit breaker as a whole into the KYN28 armored metal-enclosed switchgear cabinet. An auxiliary switch is located at the bottom of the chassis vehicle, and a microswitch is located inside the cabinet. The circuit breaker's position (operating or testing) is monitored by observing whether the auxiliary switch is connected to the microswitch, thus determining the circuit breaker's position within the cabinet. However, relying solely on the auxiliary switch at the bottom of the chassis vehicle to monitor the circuit breaker's position has low reliability. Utility Model Content

[0004] To address the issue of low reliability in existing indoor high-voltage AC vacuum circuit breakers that rely solely on an auxiliary switch at the bottom of the chassis to monitor the circuit breaker's position, this application provides an indoor high-voltage AC vacuum circuit breaker.

[0005] This application provides an indoor high-voltage AC vacuum circuit breaker, which adopts the following technical solution:

[0006] An indoor high-voltage AC vacuum circuit breaker includes a circuit breaker body, and an auxiliary top plate is provided on the circuit breaker body. The auxiliary top plate is used to contact a micro switch inside the cabinet.

[0007] By adopting the above technical solution, the circuit breaker position is monitored not only by the auxiliary switch at the bottom of the chassis, but also by the auxiliary top plate, providing dual protection for the monitoring system. Even if the auxiliary switch on the chassis fails or is damaged, monitoring can still be carried out by relying on the auxiliary top plate, thus improving the reliability and stability of monitoring.

[0008] Optionally, the auxiliary top plate includes a test position auxiliary top plate and a working position auxiliary top plate. The test position auxiliary top plate is used to contact the test position micro switch inside the cabinet, and the working position auxiliary top plate is used to contact the working position micro switch inside the cabinet.

[0009] By adopting the above technical solution, test position auxiliary top plates and working position auxiliary top plates are set at different positions on the circuit breaker body. The test position auxiliary top plates and working position auxiliary top plates respectively contact different micro switches in the cabinet, thereby determining whether the circuit breaker is in the test position or the working position, thus improving the reliability and stability of monitoring.

[0010] Optionally, the test position auxiliary top plate includes a trigger part, which is inclined and is used to slide into the designated position of the cabinet along with the circuit breaker body, thereby actuating the test position micro switch.

[0011] By adopting the above technical solution, the triggering part is tilted, which can guide the movement of the micro switch at the test position relative to the auxiliary top plate at the test position, so that the triggering part can trigger the micro switch at the test position without affecting the movement of the circuit breaker.

[0012] Optionally, the test position auxiliary top plate includes a contact portion, which is located at the position where the trigger portion triggers the test position micro switch. The contact surface of the contact portion for contacting the test position micro switch extends along the moving direction of the circuit breaker entering the cabinet.

[0013] By adopting the above technical solution, the contact part enables the micro switch at the test position to maintain a state after being triggered, avoiding the instability of the micro switch triggering at the test position and facilitating the monitoring of the movement position of the circuit breaker by the staff.

[0014] Optionally, the working position auxiliary top plate includes an abutment portion for pressing the working position micro switch along the moving direction of the circuit breaker body.

[0015] By adopting the above technical solution, the contact part can not only trigger the micro switch of the working position, but also limit the movement distance of the circuit breaker.

[0016] Optionally, it also includes a chassis vehicle, which is equipped with rollers that are detachably connected to the chassis vehicle.

[0017] By adopting the above technical solution, the rollers can be disassembled and connected to the chassis, making it convenient for staff to inspect and replace the rollers.

[0018] Optionally, the chassis is provided with a roller, which is detachably connected to the chassis. The roller is provided with a limiting boss and a limiting part at its end. The limiting boss and the limiting part are used to clamp the roller in the middle.

[0019] By adopting the above technical solution, if the roller is directly disassembled and connected to the chassis vehicle through the bolt assembly, it is impossible to control the depth of the bolt assembly into the chassis vehicle, and the rotation of the roller during use will cause the bolt to loosen. However, by installing the roller between the limiting boss and the limiting part, the rotation of the roller will not affect the connection structure between the roller shaft and the chassis vehicle, thus improving the durability of the roller.

[0020] Optionally, the limiting part includes a rotating cover, a blocking block, and a fixing block. The fixing block is disposed on the end of the roller. The rotating cover is rotatably disposed on the fixing block. The blocking block is telescopically disposed on the fixing block. A through hole is provided on the side wall of the rotating cover for the blocking block to extend out. An elastic element is provided in the fixing block for popping the blocking block out of the through hole. The blocking block is used to prevent the roller from slipping.

[0021] By adopting the above technical solution, the roller is placed on the roller shaft before the blocking block pops out. Then, the rotating cover is rotated to align the through hole with the blocking block. The blocking block pops out and blocks the end of the roller, allowing the roller to rotate and be installed between the limiting boss and the blocking block. This makes the roller installation convenient. When the roller needs to be repaired or replaced, the roller can be disassembled simply by retracting the blocking block and rotating cover. There is no need to remove the roller shaft as well, thus achieving independent disassembly and assembly of the roller.

[0022] Optionally, a retraction ramp is formed on the blocking block, the retraction ramp being used to abut against the wall of the through hole to press the blocking block back into the rotating cover.

[0023] By adopting the above technical solution and setting a recycling ramp, the staff only needs to rotate the rotating cover to pop up and retract the blocking block. No other auxiliary operations are required, and one person can complete the task, which is convenient.

[0024] Optionally, multiple blocking blocks are provided, and the multiple blocking blocks are circumferentially distributed around the roller.

[0025] By adopting the above technical solution, multiple blocking blocks are distributed around the roller shaft, which plays a better role in limiting the roller and making the roller rotation more stable.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. This provides dual protection for the monitoring system. Even if the auxiliary switch on the chassis vehicle malfunctions or is damaged, monitoring can still be carried out using the auxiliary top plate, thus improving the reliability and stability of the monitoring.

[0028] 2. To enable the triggering unit to trigger the micro switch at the test position without affecting the movement of the circuit breaker;

[0029] 3. When the roller needs to be repaired or replaced, the roller can be disassembled simply by retracting the blocking block into the rotating cover. There is no need to remove the roller shaft as well, thus enabling independent disassembly and assembly of the roller. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the auxiliary top plate at the test position in Embodiment 1 of this application.

[0032] Figure 3 This is a schematic diagram of the structure of the auxiliary top plate for the working position in Embodiment 1 of this application.

[0033] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0034] Figure 5 This is a schematic diagram of the roller structure in Embodiment 2 of this application.

[0035] Figure 6 It is along Figure 5 Sectional view of AA.

[0036] Figure 7 It is along Figure 5 A cross-sectional view of BB.

[0037] Explanation of reference numerals in the attached drawings: 1. Circuit breaker body; 11. Middle sealing plate; 12. Right sealing plate; 2. Auxiliary top plate; 21. Test position auxiliary top plate; 211. Triggering part; 212. Contact part; 22. Working position auxiliary top plate; 221. Abutting part; 3. Chassis vehicle; 4. Roller; 5. Roller shaft; 6. Limiting boss; 7. Limiting part; 71. Rotating cover; 711. Through hole; 712. Receiving cavity; 72. Blocking block; 721. Recycling ramp; 722. Blocking end; 723. Limiting end; 73. Elastic element; 74. Fixing block; 741. Slide groove; 75. Rotating shaft. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0039] Example 1:

[0040] Embodiment 1 of this application discloses an indoor high-voltage AC vacuum circuit breaker. (Refer to...) Figure 1, including a circuit breaker body 1, on which an auxiliary top plate 2 is fixedly installed. The auxiliary top plate 2 is used to abut against a micro switch in the cabinet to trigger the micro switch. The circuit breaker body 1 includes a middle sealing plate 11 and a right sealing plate 12. The right sealing plate 12 is located on the side of the middle sealing plate 11 and is fixedly connected to the middle sealing plate 11 through a bolt assembly. The auxiliary top plate 2 includes a test position auxiliary top plate 21 fixedly installed on the side wall of the middle sealing plate 11. The test position auxiliary top plate 21 is used to abut against the test position micro switch and enable the circuit breaker to continue to move into the cabinet to the working position. The auxiliary top plate 2 includes a working position auxiliary top plate 22 fixedly installed on the side wall of the right sealing plate 12. The working position auxiliary top plate 22 is used to abut against the working position micro switch and assist in limiting the movement of the circuit breaker.

[0041] Refer to Figure 2 , the test position auxiliary top plate 21 extends integrally in a direction perpendicular to the moving direction of the circuit breaker into the cabinet. The test position auxiliary top plate 21 includes a triggering portion 211 and a contact portion 212. The contact portion 212 is fixedly connected to the side wall of the middle sealing plate 11, and there is an acute angle between the height extension direction of the contact portion 212 and the vertical gravity line. The side surface of the contact portion 212 for contacting the test position micro switch is used as the contact surface. The contact surface of the contact portion 212 is used to abut against the test position micro switch in the triggered state to keep the test position micro switch in the triggered state. The contact surface of the contact portion 212 extends along the moving direction of the circuit breaker into the cabinet. The triggering portion 211 is formed by bending the two end portions of the contact surface extension direction of the contact portion 212. The triggering portion 211 is inclined. The triggering portion 211 is inclined in the direction of getting closer to the middle sealing plate 11 as it gets farther away from the contact surface of the contact portion 212. The triggering portion 211 is used to slidably abut against the test position micro switch to press the test position micro switch to the triggered state.

[0042] Refer to Figure 3 , the working position auxiliary top plate 22 is in a "ji" shape and is formed by bending a steel plate. The working position auxiliary top plate 22 includes a abutting portion 221. The abutting portion 221 is bent and protruded along the moving direction of the circuit breaker into the cabinet. The abutting surface of the abutting portion 221 extends in a direction perpendicular to the moving direction of the circuit breaker into the cabinet. The abutting portion 221 is used to press the working position micro switch along the moving direction of the circuit breaker body 1.

[0043] The implementation principle of an indoor high-voltage AC vacuum circuit breaker according to Embodiment 1 of this application is as follows: The operator places the circuit breaker into the cabinet and pushes it to the test position. At this time, the auxiliary top plate 21 of the test position abuts against the test position micro switch inside the cabinet, triggering the test position micro switch. At this time, the operator determines that the circuit breaker is in the test position and can test the circuit breaker. After the test is completed, the cabinet door is closed, and the operator moves the circuit breaker from the test position to the working position by turning the crank. At this time, the auxiliary top plate 22 of the working position abuts against the working position micro switch inside the cabinet, triggering the working position micro switch. At this time, the operator determines that the circuit breaker is in the working position, stops turning the crank, and the circuit breaker operates normally.

[0044] Example 2:

[0045] Reference Figure 4 and Figure 5 Unlike Embodiment 1, this embodiment also includes a chassis 3. Multiple rollers 5 are threaded onto the chassis 3, and rollers 4 are detachably and rotatably connected to the rollers 5. A limiting boss 6 is integrally formed on the outer side wall of the chassis 3 near the rollers 5, for contact with the outer side wall of the chassis 3. When the rollers 5 are tightened onto the chassis 3, the limiting boss 6 contacts the side wall of the chassis 3. A limiting part 7 is installed on the end of the rollers 5 away from the chassis 3, and the rollers 4 are rotatably mounted between the limiting boss 6 and the limiting part 7.

[0046] Reference Figure 6 and Figure 7 The limiting part 7 includes a rotating cover 71 and a fixing block 74. The rotating cover 71 has a receiving cavity 712. The fixing block 74 has a triangular cross-section and is fixedly installed on the end of the roller 5 and located in the receiving cavity 712. The rotating cover 71 covers and rotates on the fixing block 74 through the receiving cavity 712. The fixing block 74 has a stepped groove in its center. A rotating shaft 75 is rotatably installed in the stepped groove. The rotating shaft 75 is a stepped shaft. The large diameter section of the rotating shaft 75 is located away from the rotating cover 71, and the small diameter section of the rotating shaft 75 is fixedly connected to the rotating cover 71. The stepped groove is adapted to the rotating shaft 75, so that the large diameter section of the rotating shaft 75 is rotatably installed in the large diameter section of the stepped groove, and the small diameter section of the rotating shaft 75 is rotatably installed in the small diameter section of the stepped groove. The small diameter section of the stepped groove blocks the large diameter section of the rotating shaft 75, making it difficult for the rotating cover 71 to come out of the fixing block 74.

[0047] Reference Figure 6A through hole 711 is formed on the outer circumferential surface of the rotating cover 71, communicating with the receiving cavity 712. There are three through holes 711, evenly distributed on the outer circumferential surface of the rotating cover 71. Three blocking blocks 72 are slidably extended on the fixing block 74, evenly distributed around the rotation axis of the rotating cover 71. Three sliding grooves 741 are formed on the fixing block 74 for the sliding of the blocking blocks 72. Each groove 741 corresponds to a blocking block 72, allowing the blocking block 72 to slide in or out of the groove. An elastic element 73 is press-fitted between the blocking block 72 and the bottom wall of the groove 741. When the rotating cover 71 rotates until the through hole 711 aligns with the groove 741, the elastic element 73 ejects the blocking block 72, limiting the movement of the roller 4.

[0048] Reference Figure 6 The blocking block 72 includes a blocking end 722 and a limiting end 723. The blocking end 722 has a right-angled triangular cross-section and includes a retraction inclined surface 721, which is the hypotenuse of the right-angled triangle. The retraction inclined surface 721 is used to abut against the wall of the through hole 711 so as to press the blocking end 722 back into the rotating cover 71 when the rotating cover 71 rotates. The limiting end 723 is larger than the diameter of the through hole 711. The two sides of the limiting end 723 abut against the inner wall of the slide groove 741, so that the limiting end 723 slides along the opening direction of the slide groove 741.

[0049] The implementation principle of an indoor high-voltage AC vacuum circuit breaker according to Embodiment 2 of this application is as follows: The operator first screws the roller 5 into the chassis 3 until the limiting boss 6 abuts against the side wall of the chassis 3. Then, the roller 4 passes through the limiting part 7 and is fitted onto the roller 5. The rotating cover 71 is rotated so that the through hole 711 on the outer circumference of the rotating cover 71 aligns with the blocking block 72. The elastic element 73 pushes the blocking end 722 of the blocking block 72 out of the through hole 711, so that the blocking end 722 limits the roller 4. During use, the roller 4 rotates between the limiting boss 6 and the limiting part 7. When the roller 4 needs to be inspected or replaced, the rotating cover 71 is rotated so that the hole wall of the through hole 711 abuts against and slides against the recovery inclined surface 721, thereby pressing the blocking end 722 back into the rotating cover 71, allowing the roller 4 to be disassembled and reassembled.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An indoor high-voltage AC vacuum circuit breaker, characterized in that: It includes a circuit breaker body (1), and an auxiliary top plate (2) is provided on the circuit breaker body (1). The auxiliary top plate (2) is used to contact the micro switch inside the cabinet.

2. The indoor high-voltage AC vacuum circuit breaker according to claim 1, characterized in that: The auxiliary top plate (2) includes a test position auxiliary top plate (21) and a working position auxiliary top plate (22). The test position auxiliary top plate (21) is used to contact the test position micro switch inside the cabinet, and the working position auxiliary top plate (22) is used to contact the working position micro switch inside the cabinet.

3. The indoor high-voltage AC vacuum circuit breaker according to claim 2, characterized in that: The test position auxiliary top plate (21) includes a trigger part (211), which is inclined and is used to slide into the designated position of the cabinet along with the circuit breaker body (1) and actuate the test position micro switch.

4. The indoor high-voltage AC vacuum circuit breaker according to claim 3, characterized in that: The test position auxiliary top plate (21) includes a contact part (212), which is located at the position where the trigger part (211) triggers the test position micro switch. The contact surface of the contact part (212) that contacts the test position micro switch extends along the moving direction of the circuit breaker entering the cabinet.

5. The indoor high-voltage AC vacuum circuit breaker according to claim 2, characterized in that: The working position auxiliary top plate (22) includes an abutment part (221), which is used to press the working position micro switch along the moving direction of the circuit breaker body (1).

6. The indoor high-voltage AC vacuum circuit breaker according to claim 1, characterized in that: It also includes a chassis vehicle (3), on which rollers (4) are provided, and the rollers (4) are detachably connected to the chassis vehicle (3).

7. The indoor high-voltage AC vacuum circuit breaker according to claim 6, characterized in that: The chassis (3) is provided with a roller (5), which is detachably connected to the chassis (3). The roller (5) is provided with a limiting boss (6), and the end of the roller (5) is provided with a limiting part (7). The limiting boss (6) and the limiting part (7) are used to clamp the roller (4) in the middle.

8. The indoor high-voltage AC vacuum circuit breaker according to claim 7, characterized in that: The limiting part (7) includes a rotating cover (71), a blocking block (72) and a fixing block (74). The fixing block (74) is located on the end of the roller (5). The rotating cover (71) is rotatably mounted on the fixing block (74). The blocking block (72) is telescopically mounted on the fixing block (74). A through hole (711) is provided on the side wall of the rotating cover (71) for the blocking block (72) to extend out. An elastic element (73) is provided in the fixing block (74) for popping the blocking block (72) out of the through hole (711). The blocking block (72) is used to prevent the roller (4) from slipping.

9. The indoor high-voltage AC vacuum circuit breaker according to claim 8, characterized in that: A retraction ramp (721) is formed on the blocking block (72), which is used to abut against the wall of the through hole (711) to press the blocking block (72) back into the rotating cover (71).

10. The indoor high-voltage AC vacuum circuit breaker according to claim 8, characterized in that: The blocking blocks (72) are provided in multiple ways, and the multiple blocking blocks (72) are circumferentially distributed around the roller (5).

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