Door opening interlocking mechanism of mining high-voltage permanent magnet vacuum power distribution device

Abstract

A door opening interlocking mechanism of a mining high-voltage permanent magnet vacuum power distribution device comprises an interlocking seat, a hook and an action baffle, a fixing shaft is installed outside the interlocking seat, and the hook is rotationally connected to the fixing shaft; a limiting shaft is arranged at the end part of the hook; a pressing plate matched with the limiting shaft is arranged in the door cover; a first support shaft sleeve and a second support shaft sleeve are respectively arranged outside the interlocking seat, a first action shaft and a second action shaft are respectively arranged in the first support shaft sleeve and the second support shaft sleeve, and the first action shaft and the second action shaft are connected through a linkage plate; the second action shaft is connected with the second supporting shaft sleeve through a tension spring; limiting jacks are formed in the side walls of the door cover and the power distribution box body; the action baffle is installed on the side of the distribution trolley. According to the utility model, the defects in the prior art are overcome, the door cover can be opened only when the power distribution trolley is moved to a maintenance position, and the problem that the power distribution trolley is pushed to be closed due to misoperation can be effectively prevented after the door is opened, so that the safety of the whole feed switch is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a door opening interlocking mechanism for a mining high-voltage permanent magnet vacuum power distribution device. Background Technology

[0002] In conventional explosion-proof power distribution devices and integrated protection devices used in mines, the current trend is to enable manual mechanical opening and closing operations of the electrical device body without opening the cover. This means that with the cover closed, the electrical device body can be cranked back to the maintenance position via a crank handle on a specially designed pivot on the cover, thereby ensuring absolute circuit safety or allowing for further maintenance operations such as opening the cover. This step requires an interlock between the housing, the electrical device body, and the cover to ensure the safety of the operation.

[0003] The main body of the electrical device is generally called a "power distribution trolley". Typically, the power distribution trolley needs to be connected to a rotating shaft that passes through the housing. The rotating shaft forms a limiting relationship with a locking rod through a groove. The locking rod extends out of the sliding door's cover slot to block the movement, thus interlocking the door cover with the main body trolley. However, because the transmission interlocking mechanism is located outside the power distribution box, it is easily damaged or deformed by external forces, leading to the door cover being unable to open. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a door opening interlock mechanism for a mine-use high-voltage permanent magnet vacuum power distribution device. This mechanism overcomes the deficiencies of existing technologies, features a reasonable design, and ensures that the power distribution trolley must be moved to the maintenance position before the door can be opened. Furthermore, it effectively prevents the trolley from being accidentally pushed forward and the circuit breaker closed, thus effectively ensuring the safety of the entire power supply switch. It also effectively avoids the problem of the door opening interlock mechanism being damaged or deformed by external forces, preventing the door from opening.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A door opening interlocking mechanism for a high-voltage permanent magnet vacuum power distribution device in a mine includes an interlocking seat, a hook, and an actuating baffle. The interlocking seat is fixedly installed on the inner wall of the distribution box cavity. A fixed shaft is fixedly installed above the outer surface of the interlocking seat. The middle of the hook is rotatably connected to the outer surface of the fixed shaft through a rotating through hole. A hook groove is opened on the lower surface of one end of the hook. A limit shaft is fixedly installed on the outer surface of the other end of the hook. A door cover is slidably installed on the front side of the distribution box. A pressure plate is fixedly installed on the inner surface of the door cover. The lower surface of the pressure plate is in contact with the limit shaft.

[0007] A first support bushing is fixedly connected to the middle of the outer surface of the interlocking seat. A first actuating shaft is horizontally slidably connected to the middle of the first support bushing. A second support bushing is fixedly connected to the lower part of the outer surface of the interlocking seat. A second actuating shaft is horizontally slidably connected to the middle of the second support bushing. The ends of the first actuating shaft and the second actuating shaft that are close to each other are connected by a linkage plate. A tension spring connecting plate is provided on the inner side of the end of the second actuating shaft that is close to the first actuating shaft. One end of the tension spring is connected to the tension spring connecting plate, and the other end of the tension spring is fixedly connected to the second support bushing. Corresponding limit holes are provided on the side walls of the door cover and the distribution box. The end of the second actuating shaft that is away from the first actuating shaft is movably inserted into the limit hole. A linkage plate mounting shaft is fixedly installed on the outer surface of the interlocking seat. The middle of the linkage plate is rotatably connected to the outer surface of the linkage plate mounting shaft.

[0008] The actuation baffle is installed on the side of the power distribution trolley. The side of the actuation baffle abuts against the end of the first actuation shaft, and the upper surface of the actuation baffle engages with the hook groove.

[0009] Preferably, the first support bushing includes a first support plate and a first hollow bushing, one end of the first support plate is fixedly connected to the outer surface of the interlock seat, and the other end of the first support plate is fixedly connected to the first hollow bushing; the second support bushing includes a second support plate and a second hollow bushing, one end of the second support plate is fixedly connected to the outer surface of the interlock seat, and the second support plate is fixedly connected to the second hollow bushing; a tension spring connecting hole is provided on the surface of the second hollow bushing, and the end of the tension spring is connected to the tension spring connecting hole.

[0010] Preferably, the first actuating shaft and the second actuating shaft are respectively provided at their ends close to each other, and a first rotating shaft and a second rotating shaft are respectively installed in the first moving shaft and the second moving shaft. The two ends of the connecting plate are movably connected to the first moving shaft and the second moving shaft through the first rotating shaft and the second moving shaft, respectively.

[0011] Preferably, the two ends of the linkage plate are respectively provided with a first strip hole and a second strip hole, the first rotating shaft passes through the first strip hole and the first movable slot and is mounted on the first actuating shaft by a locking pin, and the second actuating shaft passes through the second strip hole and the second movable slot and is mounted on the second actuating shaft by a locking pin.

[0012] This utility model provides a door opening interlock mechanism for a high-voltage permanent magnet vacuum power distribution device used in mining. It offers the following advantages: By setting an interlock seat and slidingly mounting a first and second actuating shaft on it, with transmission between the shafts via a connecting plate, and through the interaction of a hook and an actuating baffle, the door can be opened only after the power distribution trolley has reached the maintenance position. After opening, the hook and actuating baffle prevent the trolley from retracting to the operating position, ensuring maintenance safety. Furthermore, the trolley's tension spring can only return to its operating position when the door cover is closed. This effectively ensures that the power distribution trolley can only be closed after the door is closed, preventing accidental pushing of the trolley to the operating position after opening. The entire door opening interlock mechanism is housed inside the power distribution box, reducing overall equipment space while meeting interlocking requirements; it also effectively prevents the door cover from becoming deformed due to external forces, thus preventing it from opening. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the central locking seat of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of this utility model in conjunction with the power distribution trolley;

[0018] Figure 5 This is a schematic diagram of the structure of the first action shaft, the second action shaft, and the connecting plate in this utility model;

[0019] Figure 6 This is a schematic diagram of the structure in this utility model in which the first action shaft, the second action shaft, and the connecting plate are separated from each other;

[0020] Explanation of the labels in the diagram:

[0021] 1. Interlock seat; 2. Hook; 3. Action baffle; 4. Distribution box body; 5. Fixed shaft; 6. Hook groove; 7. Limiting shaft; 8. Door cover; 9. Pressure plate; 10. First support bushing; 11. First action shaft; 12. Second support bushing; 13. Second action shaft; 14. Linkage plate; 15. Distribution trolley; 16. Tension spring connecting plate; 17. Tension spring; 18. Limiting insertion hole; 19. Linkage plate mounting shaft; 20. First movable slot; 21. Second movable slot; 22. First rotating shaft; 23. Second rotating shaft; 101. First support plate; 102. First hollow bushing; 121. Second support plate; 122. Second hollow bushing; 141. First strip hole; 142. Second strip hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Example 1, as Figure 1-6 As shown, a door opening interlocking mechanism for a mine high-voltage permanent magnet vacuum power distribution device includes an interlocking seat 1, a hook 2, and an actuating baffle 3. The interlocking seat 1 is fixedly installed on the inner wall of the distribution box 4. A fixed shaft 5 is fixedly installed above the outer surface of the interlocking seat 1. The middle of the hook 2 is rotatably connected to the outer surface of the fixed shaft 5 through a rotating through hole. A hook groove 6 is opened on the lower surface of one end of the hook 2. A limit shaft 7 is fixedly installed on the outer surface of the other end of the hook 2. A door cover 8 is slidably installed on the front side of the distribution box 4. A pressure plate 9 is fixedly installed on the inner surface of the door cover 8. The lower surface of the pressure plate 9 is in contact with the limit shaft 7. The end of the hook 2 near the hook groove 6 is heavier than the end near the limit shaft 7.

[0024] A first support bushing 10 is fixedly connected to the middle of the outer surface of the interlocking seat 1. A first actuating shaft 11 is horizontally slidably connected to the middle of the first support bushing 10. A second support bushing 12 is fixedly connected to the lower part of the outer surface of the interlocking seat 1. A second actuating shaft 13 is horizontally slidably connected to the middle of the second support bushing 12. The ends of the first actuating shaft 11 and the second actuating shaft 13 that are close to each other are connected by a connecting plate 14. A tension spring connecting plate 16 is provided on the inner side of the end of the second actuating shaft 13 that is close to the first actuating shaft 11. One end of a tension spring 17 is connected to the tension spring connecting plate 16. The other end of the tension spring 17 is fixedly connected to the second support bushing 12. The door cover 8 and the side wall of the distribution box 4 are provided with corresponding limiting holes 18. The end of the second actuating shaft 13 that is away from the first actuating shaft 11 is movably inserted into the limiting hole 18. A connecting plate mounting shaft 19 is fixedly installed on the outer surface of the interlocking seat 1. The middle of the connecting plate 14 is rotatably connected to the outer surface of the connecting plate mounting shaft 19.

[0025] The actuation baffle 3 is installed on the side of the power distribution trolley 15. The side of the actuation baffle 3 abuts against the end of the first actuation shaft 11, and the upper surface of the actuation baffle 3 is engaged with the hook groove 6. The two ends of the linkage plate 14 are respectively provided with a first strip hole 141 and a second strip hole 142. The first rotating shaft 22 passes through the first strip hole 141 and the first movable slot 20 and is mounted on the first actuation shaft 11 by a locking pin. The second actuation shaft 13 passes through the second strip hole 142 and the second movable slot 21 and is mounted on the second actuation shaft 13 by a locking pin.

[0026] The two ends of the linkage plate 14 are respectively provided with a first strip hole 141 and a second strip hole 142. The first rotating shaft 22 passes through the first strip hole 141 and is installed on the first actuating shaft 11 by locking pin. The second actuating shaft 13 passes through the second strip hole 142 and is installed on the second actuating shaft 13 by locking pin.

[0027] Working principle:

[0028] Initially, the power distribution trolley 15 is in its working position inside the power distribution box 4, and the door cover 8 is closed. Figure 4 As shown, at this time, the actuation baffle 3 on the side of the power distribution trolley 15 moves away from the first actuation shaft 11, and the second actuation shaft 13 also moves towards the door cover 8 due to the tension of the tension spring 17. This ensures that the second actuation shaft 13 remains inserted into the limiting socket 18, thereby continuously locking the door cover 8. Furthermore, since the door cover 8 is in a downward sliding closed state, the pressure plate 9 on the inner surface of the door cover 8 also presses down above the limiting shaft 7, causing the hook groove 6 at the other end of the hook 2 to be tilted upwards.

[0029] When the power distribution trolley 15 needs to move from the working position to the maintenance position, the first actuating shaft 11 is pushed to move horizontally along the first support shaft sleeve 10 by the actuating baffle 3 on the side of the power distribution trolley 15. This causes one end of the connecting plate 14 to move towards the door cover 8. Since the middle of the connecting plate 14 is rotatably connected to the outer surface of the connecting plate mounting shaft 19, the other end of the connecting plate 14 moves away from the door cover 8 through the lever principle. Then, the connecting plate 14 drives the second actuating shaft 13 to move backward away from the door cover 8. This causes the end of the second actuating shaft 13 to push out of the limiting insertion hole 18, thereby allowing the door cover 8 to slide upward and open. In this embodiment, by providing a first strip hole 141 and a second strip hole 142 at both ends of the connecting plate 14, when the connecting plate 14 rotates around the connecting plate mounting shaft 19, both ends of the connecting plate 14 and the first action shaft 11 and the second action shaft 13 can have a certain amount of displacement, so as to avoid the problem of the connecting plate 14 getting stuck during rotation.

[0030] When the door cover 8 slides upward to open, the pressure plate 9 on the inner surface of the door cover 8 also moves upward simultaneously. At this time, the pressure plate 9 separates from the limiting shaft 7. Since the end of the hook 2 near the hook groove 6 is heavier than the end near the limiting shaft 7, the hook 2 will rotate downward due to its own gravity. This allows the hook groove 6 to be precisely engaged with the action baffle 3 on the side of the power distribution trolley 15. At this time, the action baffle 3 presses against the first action shaft 11, and the hook groove 6 at the end of the hook 2 is precisely engaged with the action baffle 3, thus forming a closed loop. When the door cover 8 is not sliding downward to close, the power distribution trolley 15 can be confined to the maintenance position and cannot enter, thereby preventing the circuit breaker of the power distribution trolley 15 from closing the circuit when the door is open, thus effectively ensuring maintenance safety.

[0031] After maintenance is completed, the door cover 8 is slid down and closed. At this time, the pressure plate 9 also moves down synchronously to press against the limit shaft 7 again, thereby driving the hook 2 to rotate around the fixed shaft 5, so that the hook groove 6 is in the upward tilted state again. At this time, the hook groove 6 separates from the action baffle 3 on the side of the power distribution trolley 15, and only then can the power distribution trolley 15 be controlled to return to the working position. The second action shaft 13 is also inserted into the limit socket 18 again through the pulling force of the tension spring 17 to lock the door cover 8. Thus, after the door cover 8 is opened, the power distribution trolley 15 cannot return to the working position of the circuit breaker, and only when the door cover 8 is closed can the power distribution trolley 15 return to the working position.

[0032] Furthermore, in this embodiment, the entire door opening interlock mechanism is located inside the power distribution box 4 and does not extend beyond the power distribution box 4. This reduces the overall space occupied by the equipment while meeting the interlock requirements. It also effectively avoids the problem of the door cover 8 being unable to open due to damage or deformation of the door opening interlock mechanism caused by external forces.

[0033] In Embodiment 3, as a further preferred embodiment of Embodiment 1, the first support bushing 10 includes a first support plate 101 and a first hollow bushing 102. One end of the first support plate 101 is fixedly connected to the outer surface of the interlocking seat 1, and the other end of the first support plate 101 is fixedly connected to the first hollow bushing 102. The second support bushing 12 includes a second support plate 121 and a second hollow bushing 122. One end of the second support plate 121 is fixedly connected to the outer surface of the interlocking seat 1, and the second support plate 121 is fixedly connected to the second hollow bushing 122. A tension spring connecting hole is provided on the surface of the second hollow bushing 122, and the end of the tension spring 17 is connected to the tension spring connecting hole. By setting the first hollow bushing 102 and the second hollow bushing 122, the guiding and limiting function of the first actuating shaft 11 and the second actuating shaft 13 during movement is realized, so as to effectively ensure the stability of the first actuating shaft 11 and the second actuating shaft 13 during horizontal movement.

[0034] In Embodiment Four, as a further preferred embodiment of Embodiment One, a first movable slot 20 and a second movable slot 21 are respectively provided at their ends close to each other on the first and second movable shafts 11 and 13. A first rotating shaft 22 and a second rotating shaft 23 are respectively installed in the first movable slot 20 and 21. The two ends of the connecting plate 14 are movably connected to the first movable slot 20 and the second movable slot 21 through the first rotating shaft 22 and the second rotating shaft 23, respectively. By providing the first movable slot 20 and the second movable slot 21, the two ends of the connecting plate 14 can have a certain amount of room for movement when the connecting plate 14 rotates around the connecting plate mounting shaft 19.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mine high-voltage permanent-magnet vacuum power distribution device door opening interlocking mechanism, characterized in that: The device includes an interlock seat (1), a hook (2), and an action baffle (3). The interlock seat (1) is fixedly installed on the inner wall of the distribution box (4). A fixed shaft (5) is fixedly installed above the outer surface of the interlock seat (1). The middle of the hook (2) is rotatably connected to the outer surface of the fixed shaft (5). A hook groove (6) is opened on the lower surface of one end of the hook (2). A limit shaft (7) is fixedly installed on the outer surface of the other end of the hook (2). A door cover (8) is slidably installed on the front side of the distribution box (4). A pressure plate (9) is fixedly installed on the inner surface of the door cover (8). The lower surface of the pressure plate (9) is in contact with the limit shaft (7). A first support bushing (10) is fixedly connected to the middle of the outer surface of the interlocking seat (1). A first actuating shaft (11) is horizontally slidably connected to the middle of the first support bushing (10). A second support bushing (12) is fixedly connected to the lower part of the outer surface of the interlocking seat (1). A second actuating shaft (13) is horizontally slidably connected to the middle of the second support bushing (12). The ends of the first actuating shaft (11) and the second actuating shaft (13) that are close to each other are connected by a connecting plate (14). A tension spring is provided on the inner side of the end of the second actuating shaft (13) that is close to the first actuating shaft (11). A connecting plate (16) is provided, on which one end of a tension spring (17) is connected, and the other end of the tension spring (17) is fixedly connected to the second support bushing (12); the door cover (8) and the side wall of the distribution box (4) are provided with corresponding limiting holes (18), and the end of the second action shaft (13) away from the first action shaft (11) is movably inserted into the limiting hole (18); a connecting plate mounting shaft (19) is fixedly installed on the outer surface of the interlock seat (1), and the middle of the connecting plate (14) is rotatably connected to the outer surface of the connecting plate mounting shaft (19); The action baffle (3) is installed on the side of the power distribution trolley (15). The side of the action baffle (3) is in contact with the end of the first action shaft (11). The upper surface of the action baffle (3) is engaged with the hook groove (6).

2. The door interlocking mechanism of the high-voltage permanent-magnet vacuum power distribution device for mine according to claim 1, characterized in that: The connecting plate (14) has a first strip hole (141) and a second strip hole (142) at both ends. The first rotating shaft (22) passes through the first strip hole (141) and is mounted on the first actuating shaft (11) by a locking pin. The second actuating shaft (13) passes through the second strip hole (142) and is mounted on the second actuating shaft (13) by a locking pin.

3. The door interlocking mechanism of the high-voltage permanent-magnet vacuum power distribution device for mine according to claim 1, characterized in that: The first support sleeve (10) comprises a first support plate (101) and a first hollow sleeve (102), one end of the first support plate (101) is fixedly connected to the outer surface of the interlocking seat (1), and the other end of the first support plate (101) is fixedly connected with the first hollow sleeve (102); the second support sleeve (12) comprises a second support plate (121) and a second hollow sleeve (122), one end of the second support plate (121) is fixedly connected to the outer surface of the interlocking seat (1), and the second support plate (121) is fixedly connected with the second hollow sleeve (122); the surface of the second hollow sleeve (122) is provided with a tension spring connecting hole, and the end of the tension spring (17) is connected to the tension spring connecting hole.

4. The open door interlock mechanism of a mine high-voltage permanent magnet vacuum power distribution device according to claim 1, characterized in that: The first action shaft (11) and the second action shaft (13) are respectively provided with a first movable notch (20) and a second movable notch (21) at the end close to each other, the first movable notch (20) and the second movable notch (21) are respectively provided with a first rotating shaft (22) and a second rotating shaft (23), and the two ends of the linkage plate (14) are movably connected with the first movable notch (20) and the second movable notch (21) through the first rotating shaft (22) and the second rotating shaft (23).

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