A high-voltage switch cabinet door closing interlocking mechanism

Abstract

This application relates to the field of switchgear, and particularly to a door-closing interlocking mechanism for high-voltage switchgear. It includes a cabinet with a door on the front side. A chassis trolley is installed inside the cabinet, comprising a chassis trolley body and a circuit breaker body. The chassis trolley body has a handle, and the circuit breaker body can move along the front and rear directions of the cabinet under the drive of the chassis trolley body. An interlocking mechanism is installed inside the door, comprising a base, a clutch, a drive component, and a resilient reset component. The base is fixedly installed inside the door, and the clutch is slidably connected to the base, having two states: downward and upward. The resilient reset component pushes the clutch to the downward state, and the drive component drives the clutch to the upward state. This application provides a door-closing interlocking mechanism for high-voltage switchgear that can conveniently and cost-effectively achieve door-closing interlocking functionality, and has a wide range of applications.

Description

Technical Field

[0001] This application relates to the field of switchgear, and in particular to a door-closing interlocking mechanism for high-voltage switchgear. Background Technology

[0002] The descriptions in this section provide background information related to this disclosure only and do not constitute prior art. Interlocking of high-voltage switchgear is a crucial measure to ensure equipment and personnel safety and prevent misoperation. According to electrical safety regulations, high-voltage switchgear must meet the requirements of five-proof interlocking.

[0003] In related technologies, the door interlocking of high-voltage switchgear is generally achieved by modifying the chassis of the circuit breaker or handcart and installing padlocks on the cabinet doors. However, in the process of implementing the technical solutions in this application, the inventors discovered that the above-mentioned technology has at least the following technical problems: modifying the chassis is not only time-consuming and costly in terms of disassembly and replacement, but also requires stopping the power supply to the corresponding lines during the modification process. Furthermore, the modified chassis cannot be used for other projects, resulting in unnecessary waste of resources. Summary of the Invention

[0004] In view of this, this application provides a high-voltage switchgear door closing interlocking mechanism, which can conveniently and cost-effectively realize the door closing interlocking function, and has a wide range of applications.

[0005] To achieve the above objectives, this application employs the following technical solution:

[0006] A high-voltage switchgear door-closing interlocking mechanism is characterized by: a cabinet body, a cabinet door on the front side of the cabinet body, a chassis trolley device inside the cabinet body, the chassis trolley device including a chassis trolley body and a circuit breaker body, the chassis trolley body having a handle, and the circuit breaker body being movable along the front and rear directions of the cabinet under the drive of the chassis trolley body; an interlocking mechanism is provided on the inner side of the cabinet door, the interlocking mechanism including a base, a clutch, a driving component, and a resilient reset component, the base being fixedly installed on the inner side of the cabinet door, the clutch... The clutch is slidably connected to the base. The clutch has two states: downward and upward. The elastic reset member is used to push the clutch back to the downward state, and the drive member is used to drive the clutch upward. When the circuit breaker body moves away from the interlocking mechanism, the clutch moves downward under the action of the elastic reset member and gets stuck behind the handle, making the cabinet door unable to be opened. When the circuit breaker body moves forward, it touches and pushes the drive member, which drives the clutch upward. The clutch releases the lock on the handle, allowing the cabinet door to be opened.

[0007] The aforementioned high-voltage switchgear door-closing interlocking mechanism utilizes the handles found on the chassis as padlocks. An interlocking mechanism is installed inside the cabinet door to achieve the door-closing interlocking function. This interlocking mechanism has low modification time and cost, can be modified while the circuit breaker or handcart is in its working position without power outages, and has a wide range of applications.

[0008] In some embodiments, the drive component is slidably connected to the base in the front-to-back direction, the clutch component is slidably connected to the drive component in the vertical direction, a limit shaft is fixedly provided on the clutch component, the drive component is provided with an inclined slide groove, the inclined slide groove is inclined from the rear of the cabinet to the front of the cabinet as it extends from top to bottom, the base is provided with a vertically extending straight slide groove, and the limit shaft passes through the inclined slide groove and the straight slide groove sequentially from the inside to the outside. When the circuit breaker body moves towards the front of the cabinet and pushes the drive component to move towards the front of the cabinet, it can pull the clutch component upward. The elastic reset component is connected between the drive component and the base and is used to drive the drive component to reset in the rear direction of the cabinet, so that when the circuit breaker body moves away from the interlocking mechanism, it drives the clutch component downward.

[0009] In some embodiments, the upper end of the base is provided with a support platform and a slide rod fixedly mounted above the support platform. A support plate, which slides along the support platform in a front-to-back direction, is fixedly mounted on the drive component. A guide hole, which mates with the slide rod, is provided in the middle of the support plate. The elastic reset component is a spring sleeved on the slide rod, with its two ends abutting against the support plate and the base, respectively. The support platform and slide rod serve as guides for the front-to-back movement.

[0010] In some embodiments, the base includes two first side plates spaced apart from each other and a first back plate that fixes the two first side plates together. The internal area enclosed by the two first side plates and the first back plate forms a first inner cavity. The first inner cavity extends vertically and opens towards the rear of the cabinet. The support platform is the upper surface of the two first side plates. The height of the first back plate is higher than that of the first side plates. The sliding rod is fixedly mounted on the first back plate. The straight sliding groove is provided on the two first side plates. The driving member is disposed in the first inner cavity of the base in a back-and-forth moving manner. The driving member includes two second side plates spaced apart from each other and a second back plate that fixes the two second side plates together. The internal area enclosed by the two second side plates and the second back plate forms a second inner cavity. The second inner cavity extends downward and opens towards the rear of the cabinet. The support plate is fixedly mounted on the two second side plates. The inclined sliding groove is provided on the two second side plates. The clutch is connected to the second inner cavity of the driving member in a up-and-down moving manner.

[0011] In some embodiments, each of the two second side panels is provided with a connecting arm extending into the first inner cavity towards the rear of the cabinet, and a roller is rotatably connected to each of the two connecting arms. The roller has a small contact area with the circuit breaker body, so the roller can adapt to different shapes and slopes of different circuit breaker panels, thereby increasing applicability.

[0012] In some embodiments, the clutch element is provided with two limiting shafts spaced vertically apart. The use of two limiting shafts is mainly to increase the stability of the clutch element during movement.

[0013] In some embodiments, the base is fixedly installed on the inside of the cabinet door by screws, with the screw heads located on the outside of the cabinet door. In case of an emergency requiring operation of the circuit breaker, removing the screws on the outside of the cabinet door causes the interlocking mechanism on the inside of the cabinet door to fall off, at which point the cabinet door can be opened to operate the circuit breaker.

[0014] In some embodiments, the cabinet is provided with a guide rail extending in the front-to-back direction, the chassis body includes a chassis frame, a circuit breaker seat slidably connected to the guide rail in the front-to-back direction, and a lead screw connected between the chassis frame and the circuit breaker seat for driving the circuit breaker seat to move back and forth, and the circuit breaker body is fixedly installed on the circuit breaker seat.

[0015] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0016] 1. By using the handle of the chassis as a padlock, drilling holes in the cabinet door at the design requirements, and installing an interlocking mechanism on the inside of the cabinet door, the door closing interlocking function can be added. This modification is convenient, and the modification time and cost are low. At the same time, the circuit breaker or handcart can be modified in the working position without power outage.

[0017] 2. The door closing interlocking mechanism of this application expands the application scope of the door closing interlocking function. It can be modified to realize the door closing interlocking function for circuit breakers or handcarts of different models and manufacturers, and it can also be installed when the cabinet door and the circuit breaker panel are close to each other. At the same time, the rollers in the door closing interlocking mechanism can realize the application of different shapes and angles of different circuit breaker panels.

[0018] 3. In case of emergency requiring operation of the circuit breaker, after removing the screws on the outside of the cabinet door, the door closing interlock mechanism on the inside of the cabinet door will fall off, at which point the cabinet door can be opened to operate the circuit breaker. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the circuit breaker in its working position in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the circuit breaker in the test position in an embodiment of this application;

[0021] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 This is a schematic diagram of the interlocking mechanism in the engaged state in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the interlocking mechanism in the disengaged state in an embodiment of this application;

[0025] Figure 7 This is an exploded view of the interlocking mechanism in the embodiments of this application.

[0026] Labeling Explanation: 1. Cabinet door; 2. Chassis body; 21. Handle; 22. Chassis frame; 23. Circuit breaker base; 24. Lead screw; 3. Circuit breaker body; 4. Interlocking mechanism; 41. Base; 411. Straight slide groove; 412. Support platform; 413. First side plate; 414. First back plate; 415. First inner cavity; 416. Slide rod; 42. Clutch; 421. Limiting shaft; 43. Drive component; 431. Inclined slide groove; 432. Support plate; 4321. Guide hole; 433. Second side plate; 434. Second back plate; 435. Second inner cavity; 436. Connecting arm; 44. Elastic reset component; 45. Roller; 5. Guide rail. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.

[0028] See Figures 1 to 7This application provides a high-voltage switchgear door interlocking mechanism, including a cabinet, a cabinet door 1 on the front side of the cabinet, and a chassis vehicle device inside the cabinet. The chassis vehicle device includes a chassis vehicle body 2 and a circuit breaker body 3. The chassis vehicle body 2 has a handle 21. The circuit breaker body 3 moves along the front and rear directions of the cabinet under the drive of the chassis vehicle body 2. An interlocking mechanism 4 is provided on the inner side of the cabinet door 1. The interlocking mechanism 4 includes a base 41, a clutch 42, a drive component 43, and an elastic reset component 44. The base 41 is fixedly installed on the inner side of the cabinet door 1, and the clutch 42 is slidably connected to the handle 43. In the base 41, the clutch 42 has two states: downward and upward. The elastic reset member 44 is used to push the clutch 42 to the downward state, and the drive member 43 is used to drive the clutch 42 upward. When the circuit breaker body 3 is away from the interlocking mechanism 4, the clutch 42 moves downward under the action of the elastic reset member 44 and gets stuck behind the handle 21, so that the cabinet door 1 cannot be opened. The circuit breaker body 3 moves forward of the cabinet, touches and pushes the drive member 43, and the drive member 43 drives the clutch 42 upward. The clutch 42 releases the lock on the handle 21, so that the cabinet door 1 can be opened.

[0029] The high-voltage switchgear door-closing interlocking mechanism utilizes the handle 21, which is present on the chassis, as a padlock. By installing the interlocking mechanism 4 on the inside of the cabinet door 1, the door-closing interlocking function can be achieved. This interlocking mechanism 4 has low modification time and cost, and can be modified in the working position of the circuit breaker or handcart without power outage, and has a wide range of applications.

[0030] The drive component 43 is slidably connected to the base 41 in the front-to-back direction, and the clutch component 42 is slidably connected to the drive component 43 in the upper and lower directions. A limit shaft 421 is fixedly provided on the clutch component 42. The drive component 43 is provided with an inclined slide groove 431, which is inclined from the rear of the cabinet to the front of the cabinet during its downward extension. The base 41 is provided with a vertically extending straight slide groove 411. The limit shaft 421 passes through the inclined slide groove 431 and the straight slide groove 411 from the inside to the outside. When the circuit breaker body 3 moves towards the front of the cabinet and pushes the drive component 43 towards the front of the cabinet, it can pull the clutch component 42 upward. The elastic reset component 44 is connected between the drive component 43 and the base 41 and is used to drive the drive component 43 to reset in the rear direction of the cabinet. Thus, when the circuit breaker body 3 moves away from the interlocking mechanism 4, it drives the clutch component 42 downward.

[0031] The upper end of the base 41 is provided with a support platform 412 and a slide rod 416 fixedly mounted above the support platform 412. A support plate 432 is fixedly mounted on the drive component 43 and slidably connected to the support platform 412 in the front-back direction. A guide hole 4321 is provided in the middle of the support plate 432, which mates with the slide rod 416. The elastic reset component 44 is a spring sleeved on the slide rod 416, with both ends of the spring pressing against the support plate 432 and the base 41, respectively. The support platform 412 and the slide rod 416 serve as guides for the front-back movement.

[0032] The base 41 includes two first side plates 413 spaced apart from each other and a first back plate 414 that fixes the two first side plates 413 together. The internal area enclosed by the two first side plates 413 and the first back plate 414 forms a first inner cavity 415. The first inner cavity 415 is vertically continuous and opens towards the rear of the cabinet. The support platform 412 is the upper surface of the two first side plates 413. The height of the first back plate 414 is higher than that of the first side plates 413. A slide rod 416 is fixedly mounted on the first back plate 414, and a straight slide groove 411 is provided on the two first side plates 413. The driving member 43 moves back and forth. The drive unit 43 is located in the first inner cavity 415 of the base 41. It includes two second side plates 433 spaced apart from each other and a second back plate 434 that fixes the two second side plates 433 together. The inner area enclosed by the two second side plates 433 and the second back plate 434 forms a second inner cavity 435. The second inner cavity 435 extends downward and opens towards the rear of the cabinet. The support plate 432 is fixedly installed on the two second side plates 433. The inclined slide groove 431 is provided on the two second side plates 433. The clutch 42 is connected to the second inner cavity 435 of the drive unit 43 by moving up and down.

[0033] Each of the two second side panels 433 is provided with a connecting arm 436 extending into the first inner cavity 415 towards the rear of the cabinet, and a roller 45 is rotatably connected to the two connecting arms 436. The roller 45 has a small contact area with the circuit breaker body 3, so the roller 45 can adapt to different shapes and slopes of different circuit breaker panels, thereby increasing its applicability.

[0034] The clutch component 42 is provided with two limiting shafts 421 that are spaced apart vertically. The use of two limiting shafts 421 is mainly to increase the stability of the clutch component 42 during movement.

[0035] The base 41 is fixedly installed on the inside of the cabinet door 1 by screws, with the screw heads located on the outside of the cabinet door 1. In case of an emergency requiring operation of the circuit breaker, the interlocking mechanism 4 on the inside of the cabinet door 1 will fall off after the screws on the outside of the cabinet door 1 are removed, at which point the cabinet door 1 can be opened to operate the circuit breaker.

[0036] The cabinet is equipped with a guide rail 5 extending in the front-to-back direction. The chassis body 2 includes a chassis frame 22, a circuit breaker seat 23 slidably connected to the guide rail 5 in the front-to-back direction, and a lead screw 24 connected between the chassis frame 22 and the circuit breaker seat 23 for driving the circuit breaker seat 23 to move back and forth. The circuit breaker body 3 is fixedly installed on the circuit breaker seat 23.

[0037] The following is a brief description of the working process and usage method of a high-voltage switchgear door closing interlocking mechanism according to the above embodiments:

[0038] See Figures 3 to 6During use, the assembled interlocking mechanism 4 is installed inside the cabinet door 1, located at the top of the handle 21 of the chassis body 2, and fixed from the outside of the cabinet door 1 by two screws. When the circuit breaker is in the test position, during the closing process of the cabinet door 1, the circuit breaker body 3 contacts and presses the roller 45 on the drive component 43, which then pushes the drive component 43 to move inward to the base 41, causing the clutch component 42 to move upward. The clutch component 42 is higher than the handle 21 of the chassis body, and the interlocking mechanism 4 changes from the engaged state to the disengaged state. At this time, the cabinet door 1 can be opened normally.

[0039] When the circuit breaker is moved from the test position to the working position, the circuit breaker base 23 and the circuit breaker body move backward under the action of the lead screw 24. The circuit breaker body 3 moves backward, the drive component 43 loses the external force and moves outward under the action of the spring, the clutch component 42 moves downward until the clutch component 42 is lower than the handle 21 of the chassis body 2. The handle 21 restricts the clutch component 42 from moving forward in the direction of the cabinet, and the interlock changes from the disengaged state to the engaged state. At this time, the cabinet door 1 cannot be opened.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage switchgear door closing interlocking mechanism, characterized in that: The system includes a cabinet, with a cabinet door (1) on the front side. A chassis device is installed inside the cabinet, comprising a chassis body (2) and a circuit breaker body (3). The chassis body (2) has a handle (21), and the circuit breaker body (3) can move along the front and rear directions of the cabinet under the drive of the chassis body (2). An interlocking mechanism (4) is installed inside the cabinet door (1), comprising a base (41), a clutch (42), a drive component (43), and an elastic reset component (44). The base (41) is fixedly installed inside the cabinet door (1), and the clutch (42) slides vertically within the base (41). The clutch (42) has two states: downward and upward. The elastic reset member (44) is used to push the clutch (42) to reset to the downward state, and the drive member (43) is used to drive the clutch (42) upward. When the circuit breaker body (3) is away from the interlocking mechanism (4), the clutch (42) moves downward under the action of the elastic reset member (44) and gets stuck behind the handle (21), so that the cabinet door (1) cannot be opened. The circuit breaker body (3) moves forward to the cabinet, touches and pushes the drive member (43), and the drive member (43) drives the clutch (42) upward. The clutch (42) releases the lock on the handle (21), so that the cabinet door (1) can be opened.

2. The high-voltage switchgear door closing interlocking mechanism according to claim 1, characterized in that: The driving component (43) is slidably connected to the base (41) in the front-to-back direction. The clutch component (42) is slidably connected to the driving component (43) in the back-to-back direction. A limit shaft (421) is fixedly provided on the clutch component (42). An inclined slide groove (431) is provided on the driving component (43). The inclined slide groove (431) is inclined from the back of the cabinet to the front of the cabinet as it extends from top to bottom. A vertically extending straight slide groove (411) is provided on the base (41). The positioning shaft (421) passes through the inclined slide groove (431) and the straight slide groove (411) from the inside to the outside. When the circuit breaker body (3) moves forward and pushes the drive member (43) to move forward, the clutch member (42) can be pulled upward. The elastic reset member (44) is connected between the drive member (43) and the base (41) and is used to drive the drive member (43) to reset in the direction of the rear of the cabinet. Thus, when the circuit breaker body (3) moves away from the interlocking mechanism (4), the clutch member (42) is driven downward.

3. The high-voltage switchgear door closing interlocking mechanism according to claim 2, characterized in that: The upper end of the base (41) is provided with a support platform (412) and a slide rod (416) fixedly installed above the support platform (412). The drive member (43) is fixedly provided with a support plate (432) that is slidably connected to the support platform (412) in the front-back direction. The middle part of the support plate (432) is provided with a guide hole (4321) that cooperates with the slide rod (416). The elastic reset member (44) is a spring sleeved on the slide rod (416). The two ends of the spring respectively press against the support plate (432) and the base (41).

4. The high-voltage switchgear door closing interlocking mechanism according to claim 3, characterized in that: The base (41) includes two first side plates (413) spaced apart from each other and a first back plate (414) that fixes the two first side plates (413) together. The internal area enclosed by the two first side plates (413) and the first back plate (414) forms a first inner cavity (415). The first inner cavity (415) is vertically continuous and opens towards the rear of the cabinet. The support platform (412) is the upper surface of the two first side plates (413). The height of the first back plate (414) is higher than that of the first side plates (413). The slide rod (416) is fixedly installed on the first back plate (414). The straight slide groove (411) is installed on the two first side plates (413). The driving member (43) moves forward and backward. The drive unit (43) is located in the first inner cavity (415) of the base (41). The drive unit (43) includes two second side plates (433) spaced apart from each other and a second back plate (434) that fixes the two second side plates (433) together. The inner area enclosed by the two second side plates (433) and the second back plate (434) forms a second inner cavity (435). The second inner cavity (435) extends downward and opens towards the rear of the cabinet. The tray (432) is fixedly installed on the two second side plates (433). The inclined slide (431) is provided on the two second side plates (433). The clutch (42) is connected to the second inner cavity (435) of the drive unit (43) in a vertically moving manner.

5. The high-voltage switchgear door closing interlocking mechanism according to claim 4, characterized in that: Each of the two second side panels (433) is provided with a connecting arm (436) extending into the first inner cavity (415) in the direction of the rear of the cabinet, and a roller (45) is rotatably connected in the two connecting arms (436).

6. The high-voltage switchgear door closing interlocking mechanism according to claim 2, characterized in that: The clutch (42) is provided with two limiting shafts (421) spaced apart vertically.

7. The high-voltage switchgear door closing interlocking mechanism according to claim 1, characterized in that: The base (41) is fixedly installed on the inside of the cabinet door (1) by screws, with the screw head located on the outside of the cabinet door (1).

8. The high-voltage switchgear door closing interlocking mechanism according to claim 1, characterized in that: The cabinet is provided with a guide rail (5) extending in the front-to-back direction. The chassis body (2) includes a chassis frame (22), a circuit breaker seat (23) slidably connected to the guide rail (5) in the front-to-back direction, and a lead screw (24) connected between the chassis frame (22) and the circuit breaker seat (23) for driving the circuit breaker seat (23) to move back and forth. The circuit breaker body (3) is fixedly installed on the circuit breaker seat (23).

Images