Retreating door-opening interlocking mechanism for feeder switch

Abstract

A vehicle withdrawing door opening interlocking mechanism for a feeder switch comprises an interlocking plate, a door baffle and a circuit breaker baffle, the middle of the interlocking plate is connected with a front door frame through a rotating shaft, the door baffle is fixedly installed on the inner side of a front door, a first clamping groove is formed in the upper surface of the door baffle, and one end of the interlocking plate is clamped with the first clamping groove in a matched mode; the other end of the interlocking plate is provided with a second clamping groove, the circuit breaker baffle is installed on the side face of the moving trolley, and the circuit breaker baffle is movably clamped with the second clamping groove in a matched mode; the interlocking plate is connected with one end of an extension spring, and the other end of the extension spring is connected with the inner wall of the front door frame. According to the utility model, the defects in the prior art are overcome, the front door can be opened only when the circuit breaker is completely withdrawn from the plug, and the problem that the circuit breaker is pushed to be closed due to misoperation can be effectively prevented after the door is opened, so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] The utility model relates to the technical field of power equipment, in particular to a vehicle reversing and door opening interlocking mechanism for a feed switch. Background Art

[0002] In current mine feeder switches, the circuit breaker needs to be powered off or on during maintenance or operation, and the main circuit needs to be isolated from the circuit breaker during maintenance or fault handling.

[0003] Common feeder switch circuit breakers and corresponding electrical components are fixed inside the housing. Traditional protection only has one way to cut off the power by opening the door. That is, in order to open the door of the equipment, the circuit breaker must be tripped to cut off the power. This operation has a disadvantage, that is, after the door is opened, the circuit breaker is still connected to the power supply and cannot be completely disconnected, which poses a certain safety hazard. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a reverse door opening interlock mechanism for a feeder switch, which overcomes the shortcomings of the existing technology and is reasonably designed. It can ensure that the circuit breaker must be completely removed from the plug before the front door can be opened. After the door is opened, it can also effectively prevent the circuit breaker from being pushed into closing due to misoperation, thereby effectively ensuring the safety of the entire feeder switch.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A back-up door-opening interlock mechanism for a feed switch, wherein the feed switch comprises a feed box, a movable trolley is provided in the inner cavity of the feed box, a circuit breaker is mounted on the movable trolley, a plug is mounted on the left side of the circuit breaker, a terminal block is mounted on the left side of the inner cavity of the feed box, and the plug and the terminal block are movably engaged; a front door frame is provided on the right side of the feed box, and the outer side of the front door frame is movably connected to the front door via a door catch;

[0007] The interlock mechanism for reversing and opening the door includes an interlock plate, a door stopper and a circuit breaker stopper. The middle of the interlock plate is connected to the side of the inner wall of the front door frame away from the door buckle through a rotating shaft. The door stopper is fixedly installed on the inner side of the front door. A first card slot is provided on the upper surface of the door stopper. The lower surface of one end of the interlock plate cooperates and engages with the first card slot. A second card slot is provided on the upper surface of the other end of the interlock plate. The circuit breaker stopper is installed on the side of the mobile trolley, and the circuit breaker stopper cooperates and engages with the second card slot; one end of the tension spring is connected to the inner wall of the front door frame through a first fixed axis nail, and the other end of the tension spring is connected to the inner wall of the front door frame through a second fixed axis nail. The first fixed axis nail is located on the right side of the rotating shaft close to the door stopper.

[0008] Preferably, a slope is provided on a side of the second slot close to the rotating shaft.

[0009] Preferably, an external threaded column is provided at one end of the rotating shaft, and a limit block is provided at the other end of the rotating shaft. The limit block is located outside the interlocking plate, and the external threaded column passes through the interlocking plate and is threadedly connected to the front door frame.

[0010] The utility model provides a reverse door opening interlock mechanism for a feeder switch. It has the following beneficial effects: by providing an interlock plate, and providing a second latching slot and a slope on the interlock plate, the interlock plate tilts up at one end near the door stop when the vehicle reverses and the door is opened, thereby ensuring that the door can only be opened after the circuit breaker plug is completely separated from the terminal block. After the door is opened, the second latching slot engages and limits the circuit breaker, preventing it from returning to its operating position. This ensures that power can only be reactivated after the door is closed. This effectively prevents the circuit breaker from being pushed into position due to misoperation after the door is opened, thereby effectively ensuring the safety of the entire feeder switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for describing the prior art.

[0012] Figure 1 This is a schematic structural diagram of the feed switch in the utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the feed switch in the present invention;

[0014] Figure 3 This is a schematic diagram of the installation structure of the utility model;

[0015] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0016] Figure 5 This is a cross-sectional schematic diagram of the mobile trolley in the present invention when it is in a closed state;

[0017] Figure 6 This is a cross-sectional schematic diagram of the mobile trolley in the present invention when it is in a closed state;

[0018] Figure 7 This is a cross-sectional diagram of the present invention when the front door is opened;

[0019] Description of the numbers in the figure:

[0020] 1. Feeder box; 2. Mobile trolley; 3. Circuit breaker; 4. Plug; 5. Terminal block; 6. Front door frame; 7. Front door; 8. Interlock plate; 9. Door stopper; 10. Circuit breaker stopper; 11. Rotating shaft; 12. First slot; 13. Second slot; 14. First fixed axis pin; 15. Tension spring; 16. Second fixed axis pin; 17. Ramp. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0022] Example 1, as Figure 1-7 As shown, a back-up door-opening interlock mechanism for a feed switch is provided, wherein the feed switch includes a feed box 1, a mobile trolley 2 is provided in the inner cavity of the feed box 1, a circuit breaker 3 is installed on the mobile trolley 2, a plug 4 is installed on the left side of the circuit breaker 3, a terminal block 5 is installed on the left side of the inner cavity of the feed box 1, and the plug 4 is movably matched with the terminal block 5; a front door frame 6 is provided on the right side of the feed box 1, and the outer side of the front door frame 6 is movably connected to the front door 7 through a door buckle; in this embodiment, the feed box 1, the mobile trolley 2, the circuit breaker 3 and the front door 7 all adopt the well-known technical solutions in the prior art. For details, please refer to the solution recorded in the utility model patent with application number CN202322633502.5, which will not be repeated here.

[0023] The interlock mechanism for reversing and opening the door includes an interlock plate 8, a door stopper 9, and a circuit breaker stopper 10. The middle of the interlock plate 8 is connected to the inner wall of the front door frame 6, away from the door catch, via a rotating shaft 11. The door stopper 9 is fixedly mounted on the inner side of the front door 7. A first slot 12 is provided on the upper surface of the door stopper 9. The lower surface of one end of the interlock plate 8 engages with the first slot 12. A second slot 13 is provided on the upper surface of the other end of the interlock plate 8. The circuit breaker stopper 10 is mounted on the side of the mobile vehicle 2 and flexibly engages with the second slot 13. The interlock plate 8 is connected to one end of a tension spring 15 via a first fixed pin 14. The other end of the tension spring 15 is connected to the inner wall of the front door frame 6 via a second fixed pin 16. The first fixed pin 14 is located to the right of the rotating shaft 11, near the door stopper 9. The second slot 13 is provided with a ramp 17 on the side near the rotating shaft 11.

[0024] Working principle:

[0025] In the initial state, the mobile trolley 2 is in the closed state, that is, the plug 4 on the side of the circuit breaker 3 is connected to the terminal block 5, and the front door 7 is closed on the side of the front door frame 6. Figure 5As shown, at this time, the circuit breaker baffle 10 is located on the left side of the interlock plate 8 and is not in contact with the interlock plate 8. The tension spring 15, through its elastic tension, causes the interlock plate 8 to rotate about the rotation axis 11 toward the door baffle 9, and then causes the right end of the interlock plate 8 to engage with the first latching groove 12 on the upper surface of the door baffle 9, preventing the front door 7 from opening. This achieves the effect of closing the switch but not opening the door.

[0026] When the front door 7 needs to be opened, the mobile trolley 2 needs to be controlled to move toward the front door 7 in the feed box 1 so that the plug 4 on the side of the circuit breaker 3 is separated from the terminal block 5, and then the mobile trolley 2 is in the open state. Figure 6 As shown, the circuit breaker baffle 10 now moves toward the interlock plate 8 and, guided by the slope 17 on the left upper surface of the interlock plate 8, presses down the left end of the interlock plate 8. As a result, the right end of the interlock plate 8 tilts up and disengages from the door baffle 9 through the seesaw principle, allowing the front door 7 to open freely. This ensures that the plug 4 of the circuit breaker 3 is completely separated from the terminal block 5 before the door can be opened.

[0027] When the front door 7 is fully opened and closed again, Figure 7 As shown, at this time, the interlock plate 8 will be lifted upward by the elastic tension of the tension spring 15, so that the left end of the interlock plate 8 will be tilted upward, so that before the mobile trolley 2 returns to the position of the switch, the circuit breaker baffle 10 on the side of the mobile trolley 2 will enter the second card slot 13 at the left end of the interlock plate 8, thereby limiting the position of the mobile trolley 2 so that the mobile trolley 2 cannot return to the closed state. At this time, only when the front door 7 is closed, so that the right end of the interlock plate 8 is lifted upward and overlapped with the door baffle 9, can the circuit breaker baffle 10 be disengaged from the second card slot 13, and the mobile trolley 2 can return to the closed state. In this way, after the front door 7 is opened, the mobile trolley 2 cannot return to the working position, and the power can only be turned on when the door is closed.

[0028] In the second embodiment, as a further preferred embodiment of the first embodiment, an externally threaded post is provided at one end of the rotating shaft 11, and a limit block is provided at the other end of the rotating shaft 11. The limit block is located outside the interlocking plate 8. The externally threaded post passes through the interlocking plate 8 and is threadedly connected to the front door frame 6. Therefore, during installation, the externally threaded post of the rotating shaft 11 can be passed through the through hole in the middle of the interlocking plate 8 and then connected to the front door frame 6, so that the interlocking plate 8 can rotate around the rotating shaft 11 in a fixed position.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A door-opening interlocking mechanism for a feed switch, the feed switch comprising a feed box (1), a movable trolley (2) provided in the inner cavity of the feed box (1), a circuit breaker (3) installed on the movable trolley (2), a plug (4) installed on the left side of the circuit breaker (3), a wiring base (5) installed on the left side of the inner cavity of the feed box (1), the plug (4) and the wiring base (5) being movably matched; a front door frame (6) provided on the right side of the feed box (1), the outer side of the front door frame (6) being movably connected to the front door (7) via a door catch; Its characteristics are: The door opening interlocking mechanism for reversing the vehicle comprises an interlocking plate (8), a door stopper (9) and a circuit breaker stopper (10). The middle of the interlocking plate (8) is connected to the inner wall of the front door frame (6) away from the door buckle via a rotating shaft (11). The door stopper (9) is fixedly mounted on the inner side of the front door (7). A first card slot (12) is provided on the upper surface of the door stopper (9). The lower surface of one end of the interlocking plate (8) is engaged with the first card slot (12). The upper surface of the other end of the interlocking plate (8) is provided with a second card slot. The circuit breaker baffle (10) is mounted on the side of the mobile trolley (2), and the circuit breaker baffle (10) is movably engaged with the second engaging slot (13); one end of the tension spring (15) is connected to the interlocking plate (8) via a first fixed axis pin (14), and the other end of the tension spring (15) is connected to the inner wall of the front door frame (6) via a second fixed axis pin (16), and the first fixed axis pin (14) is located on the right side of the rotating shaft (11) near the door baffle (9).

2. A door opening interlock mechanism for a feed switch according to claim 1, characterized in that: A slope (17) is provided on one side of the second slot (13) close to the rotating shaft (11).

3. The door opening interlock mechanism for a feed switch according to claim 1, characterized in that: One end of the rotating shaft (11) is provided with an external threaded column, and the other end of the rotating shaft (11) is provided with a limit block, the limit block is located outside the interlocking plate (8), and the external threaded column passes through the interlocking plate (8) and is threadedly connected to the front door frame (6).

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