Mining flame-proof and intrinsically safe permanent magnet vacuum feed switch

Abstract

The invention discloses a mining flame-proof and intrinsically safe permanent magnet vacuum feed switch, and belongs to the technical field of safety switches, the mining flame-proof and intrinsically safe permanent magnet vacuum feed switch comprises a box body assembly, the box body assembly comprises a mounting bottom plate and a vertically arranged guide rod, and a motor is used for driving a screw rod to rotate so as to drive a lifting plate to lift along the guide rod; the manual driving assembly is used for manually controlling the lifting plate to lift; the interlocking mechanism is arranged between the box body assembly and the front door assembly, the interlocking mechanism is used for locking the front door assembly after the lifting plate drives the circuit breaker assembly to ascend to a preset position, and the interlocking mechanism is also used for unlocking the front door assembly after the lifting plate drives the circuit breaker assembly to descend to the preset position. The motor drives the lifter to drive the lifting plate and the circuit breaker assembly to lift, or the manual driving assembly drives the lifter to drive the lifting plate to lift, and the interlocking mechanism conveniently locks the front door assembly after the circuit breaker assembly is lifted to a preset position, so that the overall safety of the switch is improved.

Description

Technical Field

[0001] The present application relates to the technical field of safety switches, and in particular, to a permanent magnet vacuum feeder switch for mines that is flameproof and intrinsically safe. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present application. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present application.

[0003] In the field of coal electrical equipment, the connection of the main circuit of explosion-proof switches such as vacuum feeder switches and vacuum electromagnetic starters mainly adopts direct wire connection, that is, the wire and the original device are crimped together with bolts and wires. When inspection or maintenance is required, all connections need to be removed to take the movement out of the shell of the explosion-proof switch, which has problems such as inconvenient disassembly and assembly and low operating efficiency. For example, a Chinese patent with patent publication number CN108389755A discloses a mine explosion-proof permanent magnetic vacuum feeder switch, which includes a plug-in main circuit connection component socket and a movement connection component plug arranged in the explosion-proof switch shell, the socket is arranged in the explosion-proof switch shell, and the plug is arranged on the other side of the socket corresponding to the plug-in, when the plug is inserted into the socket, the switch movement is connected to the main circuit, and the switch is in a closed state, and the explosion-proof switch also includes a lifting device and an interlocking device, and the main circuit of the mine explosion-proof permanent magnetic vacuum feeder switch adopts an up-and-down plug-in structure, and the up-and-down plug-in operation is performed by controlling the lifting device with a handle outside the shell, which is simple and labor-saving, and ensures the personal safety of the operator.

[0004] However, the permanent magnet vacuum feeder switch in the prior art cannot conveniently realize the locking operation of the front door assembly of the feeder switch, and the lifting device structure is relatively complex, the manufacturing and maintenance costs are high, and the function switching of electric or manual control lifting cannot be quickly realized. There is a problem that it is not flexible and convenient to use. Therefore, further improvements and optimizations such as structural optimization and improved operational convenience are needed.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of at least one of the above technical problems, the present application provides a mining explosion-proof and intrinsically safe permanent magnet vacuum feeder switch, which can drive the lifting plate and the circuit breaker assembly to rise and fall by a motor-driven elevator, or drive the lifting plate to rise and fall by a manual drive assembly, and cut off the power to the motor during the driving process of the manual drive assembly, thereby realizing the electric or manual lifting function, and conveniently locking the front door assembly after the circuit breaker assembly rises to a preset position through the interlocking mechanism. The overall operation is very efficient and convenient, which is conducive to improving the overall safety of the switch.

[0007] According to one aspect of the present application, a flameproof and intrinsically safe permanent magnetic vacuum feeder switch for use in a mine is provided, comprising a box assembly, a circuit breaker assembly arranged in the box assembly, and a front door assembly arranged at the front of the box assembly. The flameproof and intrinsically safe permanent magnetic vacuum feeder switch for use in a mine also comprises a lifting plate assembly, a lift, a manual drive assembly, a motor and an interlocking mechanism:

[0008] The box assembly includes a mounting base plate and a vertically arranged guide rod, the elevator is arranged on the mounting base plate, the lifting plate assembly includes a lifting plate sleeved on the guide rod, the circuit breaker assembly is installed on the lifting plate, the output end of the elevator is connected to the lifting plate and is used to drive the lifting plate to move up and down along the guide rod, and the output shaft of the motor is connected to the first input end of the elevator;

[0009] The manual drive assembly includes a drive shaft, a connecting piece and a power-off stroke switch. The first end of the connecting piece is connected to the second input end of the elevator. The drive shaft is slidably arranged on the mounting base plate. The drive shaft is used to slide in a direction toward the connecting piece and engage with the second end of the connecting piece or slide in a direction away from the connecting piece and disengage from the connecting piece. The drive shaft is also used to drive the connecting piece to rotate after being engaged with the connecting piece. The power-off stroke switch is used to be triggered and disconnect the power supply of the motor when the drive shaft slides toward the connecting piece. The power-off stroke switch is also used to disengage from the drive shaft and conduct the power supply of the motor when the drive shaft slides and disengages from the connecting piece.

[0010] The interlocking mechanism is arranged between the box body assembly and the front door assembly. The interlocking mechanism is used to lock the front door assembly after the lifting plate drives the circuit breaker assembly to move to a first preset position. The interlocking mechanism is also used to unlock the front door assembly after the lifting plate drives the circuit breaker assembly to move to a second preset position.

[0011] In some embodiments of the present application, the interlocking mechanism includes a locking assembly, which includes a fork handle, a fork rod and a locking rod. The locking rod is slidably arranged on the box assembly and the locking rod is extended in a direction toward the front door assembly. The first end of the locking rod is used to engage with a limiting hole on the front door assembly to lock the front door assembly; the fork rod is rotatably arranged on the box assembly and the fork rod is arranged perpendicular to the locking rod. A third groove is opened on the side wall of the fork rod. The fork handle is arranged on the fork rod. The fork handle is used to drive the fork rod to rotate so that the third groove is aligned with the locking rod, so that the second end of the locking rod slides into the third groove to make the first end of the locking rod disengage from the limiting hole of the front door assembly.

[0012] In some embodiments of the present application, the locking assembly also includes a mounting frame and a fork mounting cylinder, the mounting frame is arranged on the box assembly, the locking rod is passed through the mounting frame and the locking rod is connected to a micro motor preset in the mounting frame, the fork mounting cylinder is arranged on the box assembly and the connecting line between the fork mounting cylinder and the mounting frame is vertically arranged, and the fork rod is rotatably arranged in the fork mounting cylinder.

[0013] In some embodiments of the present application, the interlocking mechanism includes a positioning locking assembly, which includes a locking hook plate and a door locking rod. The locking hook plate is arranged on a lifting plate, and the door locking rod is arranged on the front door assembly. A connecting portion is arranged at one end of the locking hook plate close to the front door assembly, and a vertical locking hook portion is arranged on the connecting portion. The locking hook portion is used to abut against the door locking rod when the lifting plate drives the locking hook plate to rise, so as to lock the front door assembly and prevent it from being opened.

[0014] In some embodiments of the present application, the manual drive assembly further includes a power-off baffle, which is disposed on the drive shaft, and the power-off baffle is used to trigger a power-off travel switch when the drive shaft slides toward the connecting member.

[0015] In some embodiments of the present application, a first groove is provided on the drive shaft, and the mine explosion-proof and intrinsically safe permanent magnet vacuum feeder switch also includes a locking assembly and a limiting assembly. The locking assembly is rotatably arranged on the box assembly, and the locking assembly is used to be locked in the first groove to limit the sliding of the drive shaft; the limiting assembly is arranged on the box assembly, and the limiting assembly is used to abut against the locking assembly and limit the rotation of the locking assembly when the locking assembly is locked in the first groove.

[0016] In some embodiments of the present application, the locking assembly includes a locking piece and a support shaft, the support shaft is arranged on a support plate preset on the box assembly, the locking piece is rotatably mounted on the support shaft, a locking portion is provided at the first end of the locking piece, the locking portion is used to be locked into the first groove, and avoidance grooves are provided on both sides of the locking portion, the avoidance grooves are used to avoid interference between the locking piece and the drive shaft when the locking portion is separated from the first groove.

[0017] In some embodiments of the present application, a locking groove is provided at the second end of the locking member, and the limiting assembly includes a mounting cylinder and a sliding member, the mounting cylinder is arranged on a connecting rod preset on the box assembly, the sliding member is slidably arranged in the mounting cylinder, and the sliding member is used to extend the mounting cylinder and engage in the locking groove to limit the rotation of the locking member.

[0018] In some embodiments of the present application, the box assembly also includes a first mounting plate and a second mounting plate that fix the device in sequence from top to bottom, the first mounting plate and the second mounting plate are arranged on the side panels of the box assembly, the guide rod is vertically arranged between the first mounting plate and the second mounting plate, an upper travel switch is arranged on the first mounting plate, and a lower travel switch is arranged on the second mounting plate, and the upper travel switch and the lower travel switch are respectively used to monitor the rising and falling travels of the lifting plate.

[0019] In some embodiments of the present application, the mine-use flameproof and intrinsically safe permanent magnet vacuum feeder switch also includes a junction box assembly and a junction terminal assembly arranged on the box assembly, and a quick-plug assembly is provided on the junction box assembly. The quick-plug assembly is used to connect to the junction terminal assembly on another mine-use flameproof and intrinsically safe permanent magnet vacuum feeder switch, thereby connecting the two mine-use flameproof and intrinsically safe permanent magnet vacuum feeder switches in series.

[0020] This application has the following beneficial effects:

[0021] The present application discloses a mine explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch, which is connected to the lead screw of the lifter through a motor and a first bevel gear pair. The starting motor can drive the lead screw to rotate, thereby driving the lift plate to be lifted and lowered along the guide rod. When it is necessary to switch to manual control of the lifting and lowering of the lift plate, it is only necessary to push the drive shaft to connect with the connector. Since the connector and the lead screw are connected through the second bevel gear pair, the drive shaft can be manually rotated to drive the connector and the lead screw to rotate synchronously, and the lifting and lowering movement of the lift plate can be precisely controlled. In the process of pushing the drive shaft to slide toward the connector, the power-off stroke switch can be triggered by the drive shaft to realize the operation of disconnecting the power supply of the motor, without the need for additional power-off operations. The switching process is very fast and efficient, which is conducive to improving the overall work efficiency.

[0022] At the same time, in the process of the lifting plate driving the circuit breaker assembly to lift, the interlocking mechanism is used to lock the front door assembly after the lifting plate drives the circuit breaker assembly to rise to a preset position, and the interlocking mechanism can also release the lock of the front door assembly after the lifting plate drives the circuit breaker assembly to descend to the preset position, thereby realizing a protective measure that the closing operation can only be performed after the front door assembly of the feed switch is locked, thereby ensuring the stable locking of the front door assembly of the feed switch when it is in working state.

[0023] Of course, any product implementing this application does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, this application also has other purposes, features and advantages. The following will further describe this application in detail with reference to the figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0026] Figure 2 It is a structural schematic diagram of a latch assembly of a preferred embodiment of the present application;

[0027] Figure 3 is a schematic structural diagram of a manual drive assembly of a preferred embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the installation of the guide rod of the preferred embodiment of the present application;

[0029] Figure 5 It is a structural schematic diagram of a locking assembly of a preferred embodiment of the present application;

[0030] Figure 6 is a structural schematic diagram of a locking assembly in a preferred embodiment of the present application;

[0031] Figure 7 It is a structural schematic diagram of a quick-insert assembly of a preferred embodiment of the present application;

[0032] Figure 8 It is a schematic diagram of a plurality of mining flameproof and intrinsically safe permanent magnetic vacuum feeder switchgears in a preferred embodiment of the present application;

[0033] Fig. 9 This is a connection diagram of a joint terminal assembly of a preferred embodiment of the present application;

[0034] Legend: 100, box assembly; 101, mounting base; 102, first mounting plate; 103, guide rod; 104, second mounting plate; 105, upper travel switch; 106, lower travel switch; 200, lifting plate assembly; 201, lifting plate; 202, guide rail; 203, slide plate; 300, circuit breaker assembly; 400, quick-insert assembly; 401, quick-insert flange; 500, front door assembly; 600, junction box assembly; 700, joint terminal assembly; 1, lift; 11, lead screw; 2, manual drive assembly; 21, drive shaft; 211, first groove; 22, connector; 221, connecting sleeve; 23, mounting sleeve ; 24. Hand wheel; 25. Power-off baffle; 26. Power-off travel switch; 3. Motor; 4. Positioning assembly; 41. Positioning piece; 411. Positioning part; 412. Avoidance groove; 413. Positioning groove; 414. Limiting groove; 42. Support shaft; 43. Limiting rod; 5. Limiting assembly; 51. Mounting cylinder; 52. Sliding piece; 521. Second groove; 522. Limiting part; 6. Locking assembly; 61. Mounting frame; 62. Fork handle; 63. Fork rod; 631. Third groove; 64. Fork mounting cylinder; 65. Locking rod; 7. Position locking assembly; 71. Locking hook plate; 711. Connecting part; 712. Lock hook part; 72. Door locking rod. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0036] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application; Figure 2 It is a structural schematic diagram of a latch assembly of a preferred embodiment of the present application; Figure 3 is a schematic structural diagram of a manual drive assembly of a preferred embodiment of the present application; Figure 4 It is a schematic diagram of the installation of the guide rod of the preferred embodiment of the present application; Figure 5 It is a structural schematic diagram of a locking assembly of a preferred embodiment of the present application; Figure 6 is a structural schematic diagram of a locking assembly in a preferred embodiment of the present application; Figure 7 It is a structural schematic diagram of a quick-insert assembly of a preferred embodiment of the present application; Figure 8 It is a schematic diagram of a plurality of mining flameproof and intrinsically safe permanent magnetic vacuum feeder switchgears in a preferred embodiment of the present application; Fig. 9 It is a connection diagram of the joint terminal assembly of the preferred embodiment of the present application.

[0037] The present application discloses a flameproof and intrinsically safe permanent magnetic vacuum feeder switch for use in mining, comprising a box assembly 100, a circuit breaker assembly 300 arranged in the box assembly 100, and a front door assembly 500 arranged at the front of the box assembly 100, characterized in that the flameproof and intrinsically safe permanent magnetic vacuum feeder switch for use in mining further comprises a lifting plate assembly 200, a lift 1, a manual drive assembly 2, a motor 3 and an interlocking mechanism:

[0038] The box assembly 100 includes a mounting base plate 101 and a vertically arranged guide rod 103, the elevator 1 is arranged on the mounting base plate 101, the lifting plate assembly 200 includes a lifting plate 201 sleeved on the guide rod 103, the circuit breaker assembly 300 is installed on the lifting plate 201, the output end of the elevator 1 is connected to the lifting plate 201 and is used to drive the lifting plate 201 to move up and down along the guide rod 103, and the output shaft of the motor 3 is connected to the first input end of the elevator 1;

[0039] The manual drive assembly 2 includes a drive shaft 21, a connecting member 22 and a power-off travel switch 26. The first end of the connecting member 22 is connected to the second input end of the lift 1. The drive shaft 21 is slidably arranged on the mounting base plate 101. The drive shaft 21 is used to slide in a direction toward the connecting member 22 and engage with the second end of the connecting member 22 or slide in a direction away from the connecting member 22 and disengage from the connecting member 22. The drive shaft 21 is also used to drive the connecting member 22 to rotate after being engaged with the connecting member 22. The power-off travel switch 26 is used to be triggered and disconnect the power supply of the motor 3 during the process of the drive shaft 21 sliding toward the connecting member 22. The power-off travel switch 26 is also used to disengage from the drive shaft 21 and conduct the power supply of the motor 3 when the drive shaft 21 slides away from the connecting member 22.

[0040] The interlocking mechanism is arranged between the box assembly 100 and the front door assembly 500. The interlocking mechanism is used to lock the front door assembly 500 after the lifting plate 201 drives the circuit breaker assembly 300 to move to the first preset position. The interlocking mechanism is also used to unlock the front door assembly 500 after the lifting plate 201 drives the circuit breaker assembly 300 to move to the second preset position.

[0041] Here, the meaning of "elevator 1" refers to a mechanism that provides a lifting driving power source, which includes a base, a screw rod 11 rotatably arranged on the base, and the screw rod 11 is vertically arranged to drive the lifting plate 201 to move up and down along the guide rod 103 through the screw rod 11. In some embodiments, the output shaft of the motor 3 is connected to the screw rod 11 through a first bevel gear pair, and the first end of the connecting member 22 is connected to the screw rod 11 through a second bevel gear pair.

[0042] Here, the meaning of “connecting member 22 ” refers to a structure connected to the screw rod 11 through a second bevel gear pair. In some embodiments, the connecting member 22 is a shaft-like part, and the connecting member 22 is rotatably disposed on the side wall of the elevator 1 .

[0043] In some embodiments, a guide rail 202 is provided on the lifting plate 201, and the circuit breaker assembly 300 cooperates with the guide rail 202 through the slide plate 203 to achieve sliding plug-in installation of the circuit breaker assembly 300, greatly improving the disassembly and assembly speed.

[0044] It should be noted that when the motor 3 is used to drive the lifting plate 201 to lift and lower the circuit breaker assembly 300, the connection and separation of the isolating static contacts of the circuit breaker assembly 300 and the feeder switch can be controlled by remote computer control, so that an isolation break can be formed without anyone on site, and the high-voltage main circuit can be disconnected, thereby truly realizing unmanned operation of the underground substation.

[0045] In the present application, the motor 3 is connected to the screw rod 11 of the lifter 1 through the first bevel gear pair. Starting the motor 3 can drive the screw rod 11 to rotate, thereby driving the lift plate 201 to move up and down along the guide rod 103. When it is necessary to switch to manually controlling the lifting of the lift plate 201, it is only necessary to push the drive shaft 21 to connect with the connecting member 22. Since the connecting member 22 is connected to the screw rod 11 through the second bevel gear pair, the connecting member 22 and the screw rod 11 can be driven to rotate synchronously by manually rotating the drive shaft 21, and the lifting and lowering movement of the lift plate 201 can be precisely controlled. In the process of pushing the drive shaft 21 to slide toward the connecting member 22, the power-off travel switch 26 can be triggered by the drive shaft 21 to disconnect the power supply of the motor 3, without the need for additional power-off operations, and the switching process is very fast and efficient.

[0046] At the same time, when the lifting plate 201 drives the circuit breaker assembly 300 to rise and fall, the interlocking mechanism is used to lock the front door assembly 500 after the lifting plate 201 drives the circuit breaker assembly 300 to rise to a preset position. The interlocking mechanism can also release the lock of the front door assembly 500 after the lifting plate 201 drives the circuit breaker assembly 300 to descend to the preset position, thereby realizing a protective measure that the closing operation can only be performed after the front door assembly 500 of the feed switch is locked, thereby ensuring that the front door assembly 500 of the feed switch is stably locked in the working state.

[0047] Preferably, please refer to Figure 5 , 6As shown, the interlocking mechanism includes a locking assembly 6, which includes a fork handle 62, a fork rod 63 and a locking rod 65. The locking rod 65 is slidably arranged on the box assembly 100 and extends in a direction toward the front door assembly 500. The first end of the locking rod 65 is used to engage with the limiting hole on the front door assembly 500 to lock the front door assembly 500; the fork rod 63 is rotatably arranged on the box assembly 100 and the fork rod 63 is arranged perpendicular to the locking rod 65. A third groove 631 is opened on the side wall of the fork rod 63. The fork handle 62 is arranged on the fork rod 63. The fork handle 62 is used to drive the fork rod 63 to rotate so that the third groove 631 is aligned with the locking rod 65, so that the second end of the locking rod 65 slides into the third groove 631 to make the first end of the locking rod 65 disengage from the limiting hole of the front door assembly 500.

[0048] It can be understood that the front door assembly 500 is locked by engaging the first end of the locking rod 65 with the front door assembly 500. When the front door assembly 500 needs to be opened, the fork handle 62 is used to rotate the fork rod 63 so that the third groove 631 of the fork rod 63 is aligned with the second end of the locking rod 65, so that the locking rod 65 can slide into the third groove 631, so that the locking rod 65 disconnects the engagement with the front door assembly 500. At this time, the front door assembly 500 can be opened, and the locking effect of the front door assembly 500 can be achieved by the locking rod 65. In addition, the overall structure of the locking assembly 6 is very simple, the manufacturing cost is low, and it is easy to maintain.

[0049] In this preferred embodiment, the locking assembly 6 also includes a mounting frame 61 and a fork mounting tube 64. The mounting frame 61 is arranged on the box assembly 100. The locking rod 65 is passed through the mounting frame 61 and the locking rod 65 is connected to a micro motor preset in the mounting frame 61. The fork mounting tube 64 is arranged on the box assembly 100 and the connecting line between the fork mounting tube 64 and the mounting frame 61 is vertically arranged. The fork rod 63 is rotatably arranged in the fork mounting tube 64.

[0050] It can be understood that the mounting frame 61 serves to install and limit the sliding movement of the locking rod 65. The locking rod 65 is driven to slide by a micro motor. Therefore, when the locking rod 65 needs to be disconnected from the front door assembly 500, it is only necessary to rotate the fork lever 63 so that the third groove 631 is aligned with the locking rod 65 and the locking rod 65 is electrically controlled to slide into the third groove 631. Then, the front door assembly 500 can be opened, which is convenient for the operator to operate through the fork handle 62 from the outside of the box assembly 100.

[0051] It should be noted that the fork handle 62 can be used as a switch for controlling the power supply. When the front door assembly 500 of the feed switch needs to be opened, the fork handle 62 on the side wall of the box assembly 100 needs to be rotated to the disconnected position so that the third groove 631 is aligned with the locking rod 65, so as to disconnect the control power supply and realize that the circuit breaker assembly 300 is automatically opened due to power failure of the control circuit. At this time, the micro motor in the mounting frame 61 is triggered, and the locking rod 65 is driven by the micro motor to slide into the third groove 631. The locking rod 65 disengages from the limit space on the front door assembly 500 to release the lock of the front door assembly 500, and only then can the front door assembly 500 be opened; the method of closing the front door assembly 500 is opposite to the opening procedure, so that the front door assembly 500 of the feed switch can be closed only after it is locked, thereby ensuring the working safety of the feed switch.

[0052] Preferably, please refer to Figure 5 , 6 As shown, the interlocking mechanism includes a locking assembly 7, which includes a locking hook plate 71 and a door locking rod 72. The locking hook plate 71 is arranged on the lifting plate 201, and the door locking rod 72 is arranged on the front door assembly 500. A connecting portion 711 is arranged at one end of the locking hook plate 71 close to the front door assembly 500, and a vertical locking hook portion 712 is arranged on the connecting portion 711. The locking hook portion 712 is used to abut against the door locking rod 72 when the lifting plate 201 drives the locking hook plate 71 to rise, so as to lock the front door assembly 500 and prevent it from being opened.

[0053] It can be understood that the locking assembly 7 can be linked with the circuit breaker assembly 300. Only when the circuit breaker assembly 300 is lowered to the preset position can the lock on the front door assembly 500 be disconnected by the locking hook plate 71. Only then can the door be opened to achieve the multiple interlocking protection effect of the front door assembly 500. The simple locking structure of the locking hook plate 71 and the door locking rod 72 can realize error prevention and multiple protection.

[0054] It should be noted that the door locking rod 72 is arranged on the front door assembly 500 in the horizontal direction, and there is a gap between the door locking rod 72 and the inner wall of the front door, so that the lock hook portion 712 can pass through the gap when rising, and cooperate with the door locking rod 72 to lock the front door assembly 500, so that the front door assembly 500 cannot be pulled open.

[0055] Preferably, please refer to Figure 3 , 4 As shown, the manual drive assembly 2 further includes a power-off baffle 25 , which is disposed on the drive shaft 21 , and is used to trigger a power-off travel switch 26 when the drive shaft 21 slides toward the connecting member 22 .

[0056] It is understandable that, by providing the power-off baffle 25 on the drive shaft 21, the power-off travel switch 26 can be triggered by the power-off baffle 25 during the process of the drive shaft 21 sliding toward the connecting member 22, so as to achieve seamless switching between electric lifting and manual lifting without the need for additional operation of disconnecting the power supply of the motor 3. In addition, the power-off baffle 25 can be conveniently adjusted in position on the drive shaft 21 to meet the setting of the trigger travel, which is conducive to adapting to different installation conditions.

[0057] Optionally, the manual drive assembly 2 further includes a mounting sleeve 23 and a handwheel 24 , the mounting sleeve 23 is disposed on the mounting base plate 101 , the drive shaft 21 is slidably disposed in the mounting sleeve 23 , and the handwheel 24 is disposed at one end of the drive shaft 21 away from the connecting member 22 .

[0058] It can be understood that by providing a handwheel 24 on the drive shaft 21, it is convenient for the operator to manually rotate the drive shaft 21 through the handwheel 24, which is conducive to improving the convenience of operation. It is also convenient to drive the drive shaft 21 to slide through the handwheel 24, thereby improving the control accuracy of the drive shaft 21.

[0059] Optionally, see Figure 4 As shown, the manual drive component 2 also includes a latch, a connecting sleeve 221 is provided at the second end of the connecting piece 22, a first socket is provided on the side wall of the connecting sleeve 221, and a second socket is provided on the shaft head of the driving shaft 21 close to the connecting piece 22, the shaft head is used to insert the connecting sleeve 221, and the latch is used to penetrate the first socket and the second socket in sequence to lock the connecting sleeve 221 and the driving shaft 21.

[0060] It can be understood that in this optional solution, when the drive shaft 21 is inserted into the connecting sleeve 221, the drive shaft 21 and the connecting sleeve 221 can be locked and limited by a pin to achieve the clamping and fixing of the drive shaft 21 and the connecting member 22, and then the connecting member 22 can be driven to rotate by the drive shaft 21.

[0061] Optionally, the shaft head of the driving shaft 21 is provided with a spring buckle, and the side wall of the connecting sleeve 221 is provided with a locking hole, and the driving shaft 21 and the connecting sleeve 221 can be conveniently connected by the cooperation of the spring buckle and the locking hole. At the same time, the connection and fastening between the driving shaft 21 and the connecting sleeve 221 can be strengthened by bolts to ensure the stability of the connection.

[0062] Preferably, please refer to Figure 1 , 2As shown in Figures 3 and 4, a first groove 211 is provided on the driving shaft 21. The mining explosion-proof and intrinsically safe permanent magnet vacuum feeding switch also includes a locking component 4 and a limiting component 5. The locking component 4 is rotatably arranged on the box component 100, and the locking component 4 is used to be locked into the first groove 211 to limit the sliding of the driving shaft 21; the limiting component 5 is arranged on the box component 100, and the limiting component 5 is used to abut against the locking component 4 and limit the rotation of the locking component 4 when the locking component 4 is locked into the first groove 211.

[0063] It can be understood that the sliding movement of the drive shaft 21 can be limited by locking the locking component 4 into the first groove 211. Since the locking component 4 is rotatably arranged, in order to ensure the limiting stability of the locking component 4 on the drive shaft 21 and facilitate the locking component 4 to release the limit on the drive shaft 21, the limiting component 5 can be abutted against the locking component 4 to limit the rotation of the locking component 4.

[0064] Preferably, please refer to Figure 1 , 2 As shown in Figures 3 and 4, the locking assembly 4 includes a locking piece 41 and a support shaft 42. The support shaft 42 is arranged on a support plate preset on the box assembly 100. The locking piece 41 is rotatably mounted on the support shaft 42. A locking portion 411 is arranged at the first end of the locking piece 41. The locking portion 411 is used to be inserted into the first groove 211. Avoidance grooves 412 are provided on both sides of the locking portion 411. The avoidance grooves 412 are used to avoid interference between the locking piece 41 and the driving shaft 21 when the locking portion 411 is separated from the first groove 211.

[0065] It can be understood that the locking member 41 is fan-shaped as a whole, and the locking portion 411 at the first end of the locking member 41 can be locked into the first groove 211 to limit the horizontal sliding of the drive shaft 21. When the locking portion 411 is disengaged from the first groove 211, the locking member 41 is provided with an avoidance groove 412, which can prevent the locking member 41 from interfering with the sliding of the drive shaft 21.

[0066] Preferably, please refer to Figure 2 As shown, a limiting groove 414 is provided on the locking member 41, and the locking assembly 4 also includes a limiting rod 43, which is horizontally arranged on a preset connecting plate on the box assembly 100, and the limiting rod 43 is used to be inserted into the limiting groove 414 to limit the rotation angle of the locking member 41.

[0067] It can be understood that in order to limit the rotation angle of the locking member 41 to avoid the locking member 41 from interfering with the drive shaft 21 and affecting the rotation of the drive shaft 21, a limiting rod 43 fixed in the horizontal direction is inserted into the limiting groove 414, which can provide a limiting effect on the clockwise or counterclockwise rotation of the locking member 41, so that the locking member 41 can only rotate to a certain angle, and cooperate with the setting of the avoidance groove 412 to ensure that there is no interference with the drive shaft 21.

[0068] It should be noted that the limiting groove 414 is an arc-shaped slot structure. When the locking member 41 rotates around the supporting shaft 42 , the limiting rod 43 is inserted into the arc-shaped limiting groove 414 to limit the swing amplitude of the locking member 41 .

[0069] Preferably, please refer to Figure 1 As shown, a locking groove 413 is provided at the second end of the locking member 41, and the limiting assembly 5 includes a mounting tube 51 and a sliding member 52, the mounting tube 51 is arranged on a preset connecting rod on the box assembly 100, and the sliding member 52 is slidably arranged in the mounting tube 51, and the sliding member 52 is used to extend the mounting tube 51 and lock into the locking groove 413 to limit the rotation of the locking member 41.

[0070] Specifically, a limiting portion 522 is provided on the sliding member 52, and a second groove 521 is opened on the limiting portion 522. The limiting portion 522 is used to snap into the locking groove 413. The second groove 521 is used to correspond to the locking groove 413 after the limiting portion 522 slides into the installation tube 51 to avoid the sliding member 52 interfering with the rotation of the locking member 41.

[0071] Here, the locking groove 413 is preferably an arc-shaped groove structure, which can better cooperate with the cylindrical limiting portion 522 to achieve rotation limitation of the locking member 41.

[0072] It is understandable that the sliding member 52 slides into the positioning groove 413 through the limiting portion 522, and limits the rotation of the positioning member 41, ensuring that the positioning member 41 stably slides and limits the drive shaft 21 through the positioning portion 411, avoiding the drive shaft 21 from accidentally touching the power-off stroke switch 26, and ensuring that the motor 3 drives the screw rod 11 to rotate normally. When it is necessary to switch to the manual lifting function, it is only necessary to push the sliding member 52 and push the second groove 521 into the positioning groove 413. At this time, the second groove 521 has a evasive function and will not interfere with the positioning member 41, so that the positioning member 41 can be manually pushed to rotate, and then the drive shaft 21 can be pushed to connect with the connecting member 22, and then the drive shaft 21 can be driven to rotate by rotating the hand wheel 24, so as to realize the lifting function of the manual control lifting plate 201, and the circuit breaker assembly 300 can be placed through the lifting plate 201 to realize the height of the circuit breaker assembly 300 manually.

[0073] It should be noted that the positions of the locking groove 413 and the locking portion 411 are preferably arranged relative to each other, so that when the sliding member 52 slides into the locking groove 413 , the locking portion 411 at the first end of the locking member 41 can be stably locked into the first groove 211 .

[0074] Preferably, please refer to Figure 1As shown, the box assembly 100 also includes a first mounting plate 102 and a second mounting plate 104 for fixing the device in sequence from top to bottom. The first mounting plate 102 and the second mounting plate 104 are arranged on the side plates of the box assembly 100. The guide rod 103 is vertically arranged between the first mounting plate 102 and the second mounting plate 104. An upper travel switch 105 is arranged on the first mounting plate 102, and a lower travel switch 106 is arranged on the second mounting plate 104. The upper travel switch 105 and the lower travel switch 106 are respectively used to monitor the rising and falling travels of the lifting plate 201.

[0075] It can be understood that the upper travel switch 105 and the lower travel switch 106 can control the lifting range of the lifting plate 201 to monitor the rising or falling position of the lifting plate 201 to adapt to different usage conditions.

[0076] Preferably, please refer to Figure 7 , 8 As shown in , 9, the flameproof and intrinsically safe permanent magnet vacuum feeder switch for mining also includes a junction box assembly 600 and a junction terminal assembly 700 arranged on the box assembly 100, and a quick-plug assembly 400 is arranged on the junction box assembly 600. The quick-plug assembly 400 is used to connect with the junction terminal assembly 700 on another flameproof and intrinsically safe permanent magnet vacuum feeder switch for mining, thereby connecting the two flameproof and intrinsically safe permanent magnet vacuum feeder switches for mining in series.

[0077] It can be understood that the feeder switch of the present application can be used alone or in combination. When combined, multiple feeder switches can be connected in series and used together by using the quick-insert flange 401 in conjunction with the connecting terminal assembly 700. The connection method is very convenient, and the conventional flange connection is convenient for disassembly, assembly and maintenance, which is conducive to improving the overall convenience of use.

[0078] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0079] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection of this application.

Claims

1. A flameproof and intrinsically safe permanent magnetic vacuum feeder switch for use in mining, comprising a box assembly (100), a circuit breaker assembly (300) arranged in the box assembly (100), and a front door assembly (500) arranged at the front of the box assembly (100), characterized in that: The mine flameproof and intrinsically safe permanent magnetic vacuum feeder switch also includes a lifting plate assembly (200), a lift (1), a manual drive assembly (2), a motor (3) and an interlocking mechanism: The box assembly (100) comprises a mounting base plate (101) and a vertically arranged guide rod (103); the elevator (1) is arranged on the mounting base plate (101); the lifting plate assembly (200) comprises a lifting plate (201) sleeved on the guide rod (103); the circuit breaker assembly (300) is installed on the lifting plate (201); the output end of the elevator (1) is connected to the lifting plate (201) and is used to drive the lifting plate (201) to move up and down along the guide rod (103); and the output shaft of the motor (3) is connected to the first input end of the elevator (1); The manual drive assembly (2) comprises a drive shaft (21), a connecting member (22) and a power-off travel switch (26), wherein a first end of the connecting member (22) is connected to a second input end of the lift (1), the drive shaft (21) is slidably disposed on a mounting base plate (101), the drive shaft (21) is used to slide in a direction toward the connecting member (22) and engage with a second end of the connecting member (22) or to slide in a direction away from the connecting member (22) and disengage from the connecting member (22), the drive shaft (21) is also used to drive the connecting member (22) to rotate after being engaged with the connecting member (22), the power-off travel switch (26) is used to be triggered and disconnect the power supply of the motor (3) when the drive shaft (21) slides toward the connecting member (22), and the power-off travel switch (26) is also used to disengage from the drive shaft (21) and conduct the power supply of the motor (3) when the drive shaft (21) slides and disengages from the connecting member (22); The interlocking mechanism is arranged between the box assembly (100) and the front door assembly (500), and is used to lock the front door assembly (500) after the lifting plate (201) drives the circuit breaker assembly (300) to move to a first preset position, and is also used to unlock the front door assembly (500) after the lifting plate (201) drives the circuit breaker assembly (300) to move to a second preset position.

2. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1 is characterized in that: The interlocking mechanism comprises a locking assembly (6), the locking assembly (6) comprising a fork handle (62), a fork rod (63) and a locking rod (65), the locking rod (65) being slidably arranged on the box assembly (100) and extending in a direction toward the front door assembly (500), the first end of the locking rod (65) being used for engaging with a limiting hole on the front door assembly (500) to lock the front door assembly (500); the fork rod (63) being rotatably arranged on the box assembly (100) 00) and the fork lever (63) is arranged perpendicular to the locking lever (65), a third groove (631) is opened on the side wall of the fork lever (63), a fork lever handle (62) is arranged on the fork lever (63), and the fork lever handle (62) is used to drive the fork lever (63) to rotate so that the third groove (631) is aligned with the locking lever (65), so that the second end of the locking lever (65) slides into the third groove (631) so that the first end of the locking lever (65) is separated from the limiting hole of the front door assembly (500).

3. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 2 is characterized in that: The locking assembly (6) further comprises a mounting frame (61) and a fork mounting cylinder (64); the mounting frame (61) is arranged on the housing assembly (100); a locking rod (65) is inserted through the mounting frame (61) and connected to a micro motor preset in the mounting frame (61); the fork mounting cylinder (64) is arranged on the housing assembly (100); and the fork rod (63) is rotatably arranged in the fork mounting cylinder (64).

4. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1 is characterized in that: The interlocking mechanism comprises a locking assembly (7), which comprises a locking hook plate (71) and a door locking rod (72). The locking hook plate (71) is arranged on the lifting plate (201), and the door locking rod (72) is arranged on the front door assembly (500). A connecting portion (711) is arranged at one end of the locking hook plate (71) close to the front door assembly (500), and a vertical locking hook portion (712) is arranged on the connecting portion (711). The locking hook portion (712) is used to abut against the door locking rod (72) when the lifting plate (201) drives the locking hook plate (71) to rise, so as to lock the front door assembly (500) so that it cannot be opened.

5. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1 is characterized in that: The manual drive assembly (2) further comprises a power-off baffle (25), which is arranged on the drive shaft (21) and is used to trigger a power-off travel switch (26) when the drive shaft (21) slides toward the connecting member (22).

6. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1, characterized in that: A first groove (211) is provided on the driving shaft (21). The mining explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch further comprises a positioning assembly (4) and a limiting assembly (5). The positioning assembly (4) is rotatably arranged on the box assembly (100). The positioning assembly (4) is used to be inserted into the first groove (211) to limit the sliding of the driving shaft (21); and the limiting assembly (5) is arranged on the box assembly (100). The limiting assembly (5) is used to abut against the positioning assembly (4) and limit the rotation of the positioning assembly (4) when the positioning assembly (4) is inserted into the first groove (211).

7. A mine flameproof and intrinsically safe permanent magnetic vacuum feeder switch according to claim 6, characterized in that: The locking assembly (4) comprises a locking piece (41) and a support shaft (42), wherein the support shaft (42) is arranged on a support plate preset on the box assembly (100), the locking piece (41) is rotatably sleeved on the support shaft (42), a locking portion (411) is arranged at a first end of the locking piece (41), the locking portion (411) is used to be locked into a first groove (211), and avoidance grooves (412) are arranged on both sides of the locking portion (411), and the avoidance grooves (412) are used to prevent the locking piece (41) from interfering with the drive shaft (21) when the locking portion (411) is separated from the first groove (211).

8. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 7, characterized in that: A locking groove (413) is formed at the second end of the locking member (41). The limiting assembly (5) comprises a mounting tube (51) and a sliding member (52). The mounting tube (51) is arranged on a connecting rod preset on the box assembly (100). The sliding member (52) is slidably arranged in the mounting tube (51). The sliding member (52) is used to extend out of the mounting tube (51) and lock into the locking groove (413) to limit the rotation of the locking member (41).

9. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1, characterized in that: The box assembly (100) also includes a first mounting plate (102) and a second mounting plate (104) for fixing the device in sequence from top to bottom. The first mounting plate (102) and the second mounting plate (104) are arranged on the box side plate of the box assembly (100). The guide rod (103) is vertically arranged between the first mounting plate (102) and the second mounting plate (104). An upper travel switch (105) is arranged on the first mounting plate (102), and a lower travel switch (106) is arranged on the second mounting plate (104). The upper travel switch (105) and the lower travel switch (106) are respectively used to monitor the ascending and descending travels of the lifting plate (201).

10. The explosion-proof and intrinsically safe permanent magnetic vacuum feeder switch for mining according to claim 1, characterized in that: The flameproof and intrinsically safe permanent magnetic vacuum feeder switch for mines also includes a junction box assembly (600) and a junction terminal assembly (700) arranged on the box assembly (100); a quick plug assembly (400) is arranged on the junction box assembly (600); the quick plug assembly (400) is used to connect to the junction terminal assembly (700) on another flameproof and intrinsically safe permanent magnetic vacuum feeder switch for mines, thereby connecting the two flameproof and intrinsically safe permanent magnetic vacuum feeder switches for mines in series.

Images