Mining semi-automatic electric arc cutting equipment

Abstract

The invention discloses mining semi-automatic electric arc cutting equipment, and relates to the technical field of electric arc cutting equipment, the mining semi-automatic electric arc cutting equipment comprises a machine body, a cutting gun, a handle, a wire roller, a limiting mechanism and a power-off mechanism, the top of the machine body is provided with a mounting groove for detachable mounting of the cutting gun, the handle is rotatably folded in a folding groove, and the limiting mechanism is in transmission connection with the handle. An abutting ball of the turntable slides an inclined plate to push a sliding disc, so that a limiting rod is inserted into a cutting gun clamping hole to lock the cutting gun, and the cutting gun is prevented from falling off during carrying; after the handle is folded, the magnetic ring adsorbs the reset limiting rod to release the cutting gun, the power-off mechanism is connected with the handle and the wire roller, and when the handle is unfolded, the power-on column and the power-on sleeve are separated for power-off; when a wire is stretched or wound to enable the wire roller to rotate, the driving rotary column slides on the two-way sliding rail through the sliding block to drive the driven rotary column to move, the power connection column and the power connection sleeve are separated to be powered off and reset to be powered on after operation is stopped, the mining carrying safety is improved, and the misoperation risk is avoided.

Description

Technical Field

[0001] This invention relates to arc cutting equipment technology, specifically a semi-automatic arc cutting equipment for mining. Background Technology

[0002] As is widely known, in mining production, arc cutting equipment is widely used in equipment maintenance, structural modification, emergency response, and other scenarios due to its ability to efficiently cut metal materials and adapt to complex working conditions. One of the core applications of arc cutting equipment is the maintenance and parts repair of large mining equipment.

[0003] The shortcomings of existing technologies are that the cutting gun lacks reliable limiting during transport in the mining area, and is easily detached and damaged due to climbing, moving and other actions; the cutting gun is often in a powered state when the equipment is being carried, and accidental activation of the switch can easily cause safety accidents, and there is no automatic power-off protection when it is being carried; the cutting gun may still be powered when the wire is being stretched or wound, which poses a high risk of misoperation, and there is no power-off protection when the wire is being retracted or extended; in addition, the switching of the states of each component requires manual operation, which is not convenient enough and makes it difficult to adapt to the complex working conditions in the mining area. Summary of the Invention

[0004] The purpose of this invention is to provide a semi-automatic electric arc cutting device for mining, so as to overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: comprising: a machine body, wherein a mounting groove is provided on the top of the machine body, a cutting gun is detachably mounted in the mounting groove, and an electrical wire connects the cutting gun and the machine body; and further comprising:

[0006] The handle is rotatably folded and installed in a folding slot on the top of the body;

[0007] A wire roller, which is movably mounted at the bottom of a mounting groove;

[0008] A limiting mechanism is connected to the handle in a transmission manner. When the handle is rotated from the folded state to the unfolded state, the handle passively drives the limiting mechanism to lock the cutting gun in the mounting groove.

[0009] The power-off mechanism is connected to the handle and the wire roller in a transmission manner. When the handle is rotated to the unfolded state and the wire roller is in the rotating state, the handle and the wire roller passively drive the power-off mechanism to cut off the power supply in the cutting gun.

[0010] As a further description of the above technical solution: the handle is rotatably installed in the folding groove, the folding groove is opened on the top of the body, one end of the handle is rotatably connected to the folding groove through a bearing, and a turntable is fixedly installed on one end of the handle fitting into the mounting groove and rotatably connected to the inner side wall of the folding groove.

[0011] As a further description of the above technical solution: the end of the roller away from the folding groove is movably inserted into the rotating sleeve through a retaining strip, and the other end of the roller is rotatably connected to a fixed sleeve through a bearing. The rotating sleeve is rotatably connected to the folding groove and fixedly connected to the rocker arm.

[0012] As a further description of the above technical solution: the fixing sleeve is a hollow cylinder with one open end and one closed end. The center of the closed end of the fixing sleeve is provided with a hole and groove, which is fixedly connected to the end face of the sliding plate facing the mounting groove. The open end of the fixing sleeve is connected to the roller through a bearing.

[0013] As a further description of the above technical solution: the limiting mechanism includes an abutting ball fixedly installed on the end face of the turntable. The abutting ball is slidably connected to the surface of an inclined plate provided on the end face of the turntable facing the folding groove. The surface of the inclined plate at the initial position and the surface at the end position gradually bulge outward. A limiting rod is fixedly installed on the end face of the slide plate facing the mounting groove. The limiting rod is detachably inserted into a locking hole, which is correspondingly opened on the side of the cutting gun.

[0014] As a further description of the above technical solution: magnetic rings with opposite magnetic properties are provided in the middle of the corresponding end faces of the turntable and the slide.

[0015] As a further description of the above technical solution: the power-off mechanism includes a power-receiving post fixedly installed at the center of the turntable end face. The power-receiving post is detachably inserted into a power-receiving sleeve. The power-receiving sleeve is movably inserted into the center of the slide plate. The bottom end of the power-receiving sleeve is inserted into a fixed sleeve and fixedly connected to a driven rotating column. The driven rotating column is rotatably connected to the fixed sleeve. A bidirectional slide rail is symmetrically arranged on the side of the driven rotating column away from the power-receiving sleeve. A slider is slidably connected in the bidirectional slide rail. The slider is fixedly installed on the end face of the driving rotating column that is in contact with the driven rotating column. A wire roller is fixedly connected to the other end face of the driving rotating column. A return spring is connected between the driving rotating column and the driven rotating column.

[0016] As a further description of the above technical solution: the slider protrudes outward at its initial position within the bidirectional slide rail, the end position of the slider sliding within the bidirectional slide rail is attached to the surface of the driven rotating column, and the unidirectional sliding angle of the slider within the bidirectional slide rail is 0°-45°.

[0017] As a further description of the above technical solution: both the active rotating column and the driven rotating column have through holes at their center positions for the insertion of electrical wires.

[0018] As a further description of the above technical solution: the bottom of the cutting gun is provided with a sleeve whose size is adapted to the wire roller.

[0019] In the above technical solution, the semi-automatic electric arc cutting equipment for mining provided by the present invention has the following beneficial effects:

[0020] 1. Prevent the cutting gun from falling off: When the handle is unfolded, the sliding plate of the limiting mechanism pushes the slide plate, causing the limiting rod to insert into the cutting gun's locking hole, thus locking the cutting gun and effectively preventing the cutting gun from falling off and being damaged due to climbing in the mining area.

[0021] 2. Automatic power-off during carrying: When the handle is unfolded for carrying, the power terminal is pulled out of the power sleeve, automatically cutting off the power to the cutting gun and preventing accidental activation of the switch during carrying, which could cause danger.

[0022] 3. Ensure safety during wire winding and unwinding: When stretching or winding the wire, the rotation of the wire roller drives the active rotating column to move through the slider, so that the power connection post is separated from the power connection sleeve and the power connection is disconnected, avoiding the safety hazards of misoperation when winding and unwinding the wire.

[0023] 4. Convenient operation and automatic reset: After the handle is folded, the magnetic ring attracts the limit rod to disengage from the locking hole and release the cutting gun; after the cord retraction stops, the reset spring drives the component to reset, and the power terminal is reconnected to power on, without the need for manual state switching. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure within the folding groove and mounting groove provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the cutting gun provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the corresponding positions between the contact ball on the end face of the turntable and the inclined plate on the surface of the slide plate when the handle is unfolded, according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the corresponding positions between the contact ball on the turntable end face and the inclined plate on the slide surface when the handle is folded, according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the slide and the roller provided in an embodiment of the present invention;

[0031] Figure 7This is a schematic diagram of the structure of the slide, roller and rotating sleeve provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the active rotating column and the driven rotating column inside the fixed sleeve provided in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure separating the active rotating column and the driven rotating column provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Machine body; 2-Cutting gun; 3-Folding groove; 4-Handle; 5-Mounting groove; 6-Rock arm; 7-Slide plate; 8-Wire roller; 9-Clamping hole; 10-Wire; 11-Clamping sleeve; 12-Turntable; 13-Contact ball; 14-Magnetic ring; 15-Electrifying post; 16-Electrifying sleeve; 17-Slant plate; 18-Rotating sleeve; 19-Clamping strip; 20-Limiting rod; 22-Driven rotating column; 23-Fixing sleeve; 24-Driven rotating column; 25-Two-way slide rail; 26-Reset spring; 27-Slider; 28-Through hole. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Please see Figures 1-9 This invention provides a semi-automatic arc cutting equipment for mining, comprising: a body 1, a mounting groove 5 on the top of the body 1, a cutting gun 2 detachably mounted in the mounting groove 5, and an electric wire 10 connecting the cutting gun 2 and the body 1; and further comprising:

[0038] Handle 4 is rotated and folded and installed in the folding slot 3 opened on the top of the body 1;

[0039] In another embodiment of the present invention, preferably, the handle 4 is rotatably installed in the folding groove 3, the folding groove 3 is opened on the top of the body 1, one end of the handle 4 is rotatably connected to the folding groove 3 through a bearing, and one end of the handle 4 is fixedly installed with a turntable 12 in the mounting groove 5 and rotatably connected to the inner side wall of the folding groove 3.

[0040] The wire roller 8 is movably installed at the bottom of the mounting groove 5;

[0041] In another embodiment of the present invention, the end of the roller 8 away from the folding groove 3 is movably inserted into the rotating sleeve 18 via a retaining strip 19, and the other end of the roller 8 is rotatably connected to a fixed sleeve 23 via a bearing. The rotating sleeve 18 is rotatably connected to the folding groove 3 and fixedly connected to the rocker arm 6.

[0042] In another embodiment of the present invention, the fixing sleeve 23 is a hollow cylinder with one open end and one closed end. The center of the closed end of the fixing sleeve 23 is provided with a hole and groove and is fixedly connected to the end face of the slide 7 facing the mounting groove 5. The open end of the fixing sleeve 23 is rotatably connected to the roller 8 through a bearing.

[0043] The limiting mechanism is connected to the handle 4 by transmission. When the handle 4 is rotated from the folded state to the unfolded state, the handle 4 passively drives the limiting mechanism to lock the cutting gun 2 in the mounting groove 5.

[0044] In another embodiment of the present invention, the limiting mechanism includes an abutting ball 13 fixedly installed on the end face of the turntable 12. The abutting ball 13 is slidably connected to the surface of the inclined plate 17 provided on the end face of the turntable 12 facing the folding groove 3. The surface of the inclined plate 17 at the initial position and the surface at the end position gradually protrude outward. A limiting rod 20 is fixedly installed on the end face of the slide plate 7 facing the mounting groove 5. The limiting rod 20 is detachably inserted into the locking hole 9, which is correspondingly opened on the side of the cutting gun 2.

[0045] In another embodiment of the present invention, magnetic rings 14 with opposite magnetic properties are provided at the center of the corresponding end faces of the turntable 12 and the slide 7.

[0046] The power-off mechanism is connected to the handle 4 and the wire roller 8. When the handle 4 is rotated to the unfolded state and the wire roller 8 is in the rotating state, the handle 4 and the wire roller 8 passively drive the power-off mechanism to cut off the power supply in the cutting gun 2.

[0047] In another embodiment of the present invention, the power-off mechanism includes a power-connecting post 15 fixedly installed at the center of the end face of the turntable 12. The power-connecting post 15 is detachably inserted into the power-connecting sleeve 16. The power-connecting sleeve 16 is movably inserted into the center of the slide plate 7. The bottom end of the power-connecting sleeve 16 is inserted into the fixed sleeve 23 and fixedly connected to the driven rotating post 22. The driven rotating post 22 is rotatably connected to the fixed sleeve 23. A bidirectional slide rail 25 is symmetrically arranged on the side of the driven rotating post 22 away from the power-connecting sleeve 16. A slider 27 is slidably connected in the bidirectional slide rail 25. The slider 27 is fixedly installed on one end face of the driving rotating post 24 that is in contact with the driven rotating post 22. A wire roller 8 is fixedly connected to the other end face of the driving rotating post 24. A return spring 26 is connected between the driving rotating post 24 and the driven rotating post 22.

[0048] In another embodiment of the present invention, the slider 27 protrudes outward from its initial position within the bidirectional slide rail 25, and the end position of the slider 27 sliding within the bidirectional slide rail 25 is attached to the surface of the driven rotating column 22. The unidirectional sliding angle of the slider 27 within the bidirectional slide rail 25 is 0°-45°. After the slider 27 rotates more than 45°, it drives the driven rotating column 22 to rotate together.

[0049] In another embodiment of the present invention, both the active rotating column 24 and the driven rotating column 22 have through holes 28 at their center positions for the insertion of the wire 10.

[0050] In another embodiment of the present invention, preferably, the bottom of the cutting gun 2 is provided with a retainer 11 whose size is adapted to the wire roller 8.

[0051] During the mining process, arc cutting equipment is needed for the maintenance of various equipment in the mining area. Due to the limitations of the mining environment, portable arc cutting equipment is required.

[0052] When equipment needs to be cut and repaired during mining operations, personnel grab handle 4 and rotate it out of the folding slot 3. Then, the body 1 of the portable semi-automatic arc cutting machine can be carried to the repair point in the mining area for repair. After carrying the body 1 to the required location, handle 4 is rotated back into the folding slot 3. At this time, the cutting gun 2 can be pulled out of the mounting slot 5. The power cord 10 connected to the bottom of the cutting gun 2 and the power supply inside the body 1 is pulled out to a certain length as needed. Then, the cutting gun 2 can be used to cut the repair location. The principle of using the cutting gun 2 for arc cutting in semi-automatic arc cutting equipment is a well-known technology and will not be elaborated on here.

[0053] The following points should be noted during the use of this device:

[0054] 1. In order to meet the special characteristics of the mining production environment, which may require climbing up and down mine tunnels, the connection structure between the cutting gun 2 and the machine body 1 has been adjusted to be more adaptable. This is to prevent the cutting gun 2 from falling off the machine body 1 during the carrying process due to climbing or other activities, which could cause it to be damaged or affect its use.

[0055] Specifically, when carrying the machine body 1, the handle 4 needs to be rotated out of the folding slot 3. At this time, the person grabs the handle 4 and lifts the machine body 1 to carry it. During this process, the handle 4 rotates upward 90°, and the handle 4 rotates the turntable 12, which is fixedly connected to one end of the bottom, clockwise by 90°. The abutment ball 13, which is symmetrically arranged on the end face of the turntable 12, slides along the surface of the inclined plate 17 that is matched with the end face of the sliding plate 7. The abutment ball 13 slides from the end of the inclined plate 17 that is horizontal with the sliding plate 7 to the end of the inclined plate 17 that protrudes outward. At this time, the abutment ball 13 slides on the surface of the inclined plate 17. The movement is restricted by the gradually outward protrusion of the inclined plate 17, causing the slide plate 7 to gradually abut and separate from the turntable 12 inside the machine body 1. At this time, the limiting rod 20 provided on the other end face of the slide plate 7 fits against the cutting gun 2 at the inner side wall of the mounting groove 5. The limiting rod 20 provided on the other end face of the slide plate 7 is inserted into the corresponding hole 9 on the side of the cutting gun 2, thereby restricting and fixing the cutting gun 2. At this time, the cutting gun 2 cannot be pulled out. During the carrying process, the cutting gun 2 is limited, effectively preventing the cutting gun 2 from falling off due to climbing or other actions in the mining area and affecting its use.

[0056] After the machine body 1 is carried to the required position, the handle 4 is rotated and folded back into the folding slot 3 to reset. At this time, the turntable 12 is rotated 90° counterclockwise to reset. After the slider loses its contact with the inclined plate 17, the magnetic rings 14 set on the corresponding end faces of the turntable 12 and the slider 7 are attracted to each other due to their opposite magnetic properties. The slider 7 is re-attracted and attached to the end face of the turntable 12. At this time, the limiting rod 20 set on the end face of the slider 7 facing the mounting slot 5 is pulled out from the card hole 9 in the cutting gun 2, and the cutting gun 2 is no longer restricted. The cutting gun 2 can then be pulled out from the mounting slot 5.

[0057] It should be noted that: one end of the slide plate 7 faces the folding groove 3, while the other end of the slide groove faces the mounting groove 5, and the slide plate 7 can only move laterally between the folding groove 3 and the mounting groove 5 and cannot rotate.

[0058] Second, in order to meet the production environment of the mining area, the equipment automatically cuts off the power in the cutting gun 2 during the process of carrying and stretching the wire 10 connecting the machine body 1 and the cutting gun 2, so as to prevent danger from being caused by accidental contact with the switch on the cutting gun 2 during the process of carrying the machine body 1 or stretching the wire 10.

[0059] There are two scenarios here. In the first scenario, when carrying the machine body 1: the handle 4 is rotated 90° to open. At this time, the contact ball 13 on the end face of the turntable 12 separates the sliding plate 7 from the turntable 12. At this time, the power terminal 15, which is connected to the internal power supply of the machine body 1 and is located at the center of the end face of the turntable 12, is pulled out from the power terminal sleeve 16 located at the center of the end face of the sliding plate 7 facing the turntable 12. At this time, the power terminal 15 and the power terminal sleeve 16 are separated. The power terminal 15 is connected to the internal power supply of the machine body 1, and the power terminal sleeve 16 is connected to the cutting gun 2 through the wire 10. At this time, the separation between the power terminal 15 and the power terminal sleeve 16 automatically cuts off the power to the cutting gun 2, effectively preventing the cutting gun 2 from being in a powered state during the carrying of the machine body 1 and causing danger by accidentally touching the switch.

[0060] The second scenario occurs after the machine body 1 is placed in the desired position, when the cutting gun 2 is gripped to stretch the wire 10 wound on the wire roller 8, or after use, when the wire 10 is rewound onto the wire roller 8:

[0061] After placing the machine body 1 in the desired position, fold the handle 4 back into the folding slot 3. The turntable 12 and slide plate 7 are then magnetically bonded together by the magnetic ring 14. The power terminal 15 is then re-inserted into the power sleeve 16 to provide power. After pulling the cutting gun 2 out of the mounting slot 5, the wire 10 is pulled out to the appropriate length according to the desired position. Pulling the wire 10 outwards causes the wire roller 8 to rotate. During rotation, the wire roller 8 drives the rotating sleeve 18 to rotate via the retaining strip 19. The wire roller 8 is inserted into the rotating sleeve 18 via the retaining strip 19 to ensure that it can be inserted and removed laterally within the rotating sleeve 18 without rotating. When the wire roller 8 rotates, it drives the rotating sleeve 18 to rotate as a whole. One end of the wire roller 8 and the rotating sleeve 18 are rotatably connected to one end of the fixed sleeve 23 via a bearing. The other end of the fixed sleeve 23 is fixedly connected to the end of the slide plate 7 facing the mounting slot 5. Therefore, when the slide plate 7 is subjected to resistance, the wire roller 8... After the compression of 13, the slide plate 7 will drive the wire roller 8 to move laterally and insert the wire roller 8 into the rotating sleeve 18. When the wire roller 8 rotates, it will drive the active rotating column 24 fixedly connected at the top position to rotate. The active rotating column 24 is inserted into the bottom opening of the fixed sleeve 23. When the active rotating column 24 rotates clockwise during wire feeding, the slider 27 on the end face of the active rotating column 24 slides along one side of the bidirectional slide rail 25 corresponding to the driven rotating column 22. Since the bidirectional slide rail 25 is set to protrude outward at the initial position and fit against the surface of the driven rotating column 22 at the end position, the slider 27 slides in the bidirectional slide rail 25 and pulls the driven rotating column 22 towards the active rotating column 24 by utilizing the shape of the slide rail. At this time, the electrical sleeve 16 fixedly installed on the end face of the driven rotating column 22 and the active rotating column 24 also moves to the opposite side of the electrical sleeve 15, separating the electrical sleeve 16 from the electrical sleeve 15 and cutting off the power to the cutting gun 2.

[0062] Similarly, when the rocker arm 6 is rotated counterclockwise to drive the rotating sleeve 18 to rotate counterclockwise and roll the wire 10 back onto the surface of the wire roller 8, the counterclockwise rotation of the wire roller 8 will cause the slider 27 to rotate on the other side of the bidirectional slide rail 25 and pull the driven rotating column 22, which will also separate the power connection column 15 and the power connection sleeve 16 to disconnect the power.

[0063] It should be noted that the driven rotating column 22 is rotatably installed inside the fixed sleeve 23, while the two-way slide rail 25 can only supply the slider 27 to slide 45° in both directions. The wire roller 8 rotates continuously during the winding and unwinding process. Therefore, after the slider 27 rotates to 45°, it will abut against the inner wall of the two-way slide rail 25, and the driven rotating column 22 and the driving rotating column 24 will continue to rotate after they come into contact. Between the rotation of the slider 27 from 0 to 45°, the driving rotating column 24 moves relative to the driven rotating column 22. After the slider 27 rotates to 45°, the driving rotating column 24 and the driven rotating column 22 remain relatively stationary as a whole and rotate, which means that the electrical connection column 15 and the electrical connection sleeve 16 can be continuously separated.

[0064] The through hole 28 at the center of the active rotating post 24 and the driven rotating post 22 is used to allow the wire 10 to be inserted without affecting the rotation between them. At the same time, a return spring 26 is provided between the active rotating post 24 and the driven rotating post 22, which can reset the slider 27 to the initial position when the wire feeding or reeling stops, and separate the driven rotating post 22 and the active rotating post 24, thereby making contact between the power connection post 15 and the power connection sleeve 16 for energization.

[0065] The bidirectional slide rail 25 is designed to bulge outward from the initial middle position and gradually conform to the surface of the driven rotating column 22 at both ends. As the slider 27 slides, the trajectory of the bidirectional slide rail 25 allows the driven rotating column 22 to gradually conform to and approach the active rotating column 24 as it rotates.

[0066] The sleeve 11 at the bottom of the cutting gun 2 is simply fitted onto the outside of the wire 10 wound on the roller 8. When the slide 7 drives the roller 8 to fit together with the rotating sleeve 18, the sleeve 11 is restricted by the rotating sleeve 18 and remains fixed. Therefore, the limiting rod 20 on the end face of the slide 7 can be inserted into the locking hole 9 for limitation.

[0067] Whether it is the forward rotation of the wire roller 8 for unloading or the reverse rotation for rewinding, the rotation of the wire roller 8 can separate the power contact post 15 and the power contact sleeve 16. During the unloading and rewinding of the wire 10, the power to the cutting gun 2 can be cut off, thus improving the safety of the welding equipment.

[0068] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A semi-automatic electric arc cutting device for mining, comprising: The machine body (1) has a mounting groove (5) on its top, in which a cutting gun (2) is detachably mounted. An electrical wire (10) connects the cutting gun (2) and the machine body (1). The machine body is characterized by further comprising: Handle (4), the handle (4) is rotated and folded and installed in the folding slot (3) opened on the top of the body (1); A wire roller (8) is movably mounted at the bottom of the mounting groove (5); The limiting mechanism is connected to the handle (4) in a transmission manner. When the handle (4) rotates from the folded state to the unfolded state, the handle (4) passively drives the limiting mechanism to lock the cutting gun (2) in the mounting groove (5). The power-off mechanism is connected to the handle (4) and the wire roller (8) in a transmission manner. When the handle (4) is rotated to the unfolded state and the wire roller (8) is in the rotating state, the handle (4) and the wire roller (8) passively drive the power-off mechanism to cut off the power supply in the cutting gun (2).

2. The semi-automatic arc cutting equipment for mining according to claim 1, characterized in that, The handle (4) is rotatably installed in the folding groove (3), which is located on the top of the body (1). One end of the handle (4) is rotatably connected to the folding groove (3) via a bearing. The handle (4) is fitted to the mounting groove (5) with a turntable (12) fixedly installed and rotatably connected to the inner wall of the folding groove (3).

3. The semi-automatic arc cutting equipment for mining according to claim 2, characterized in that, The end of the roller (8) away from the folding groove (3) is movably inserted into the rotating sleeve (18) through the clip (19), and the other end of the roller (8) is rotatably connected to the fixed sleeve (23) through the bearing. The rotating sleeve (18) is rotatably connected to the folding groove (3) and fixedly connected to the rocker arm (6).

4. A semi-automatic arc cutting device for mining according to claim 3, characterized in that, The fixing sleeve (23) is a hollow cylinder with one end open and the other end closed. The center of the closed end of the fixing sleeve (23) is provided with a hole and groove and is fixedly connected to the end face of the slide (7) facing the mounting groove (5). The open end of the fixing sleeve (23) is connected to the roller (8) through a bearing.

5. A semi-automatic arc cutting device for mining according to claim 4, characterized in that, The limiting mechanism includes a contact ball (13) fixedly installed on the end face of the turntable (12). The contact ball (13) is slidably connected to the surface of the inclined plate (17) provided on the end face of the turntable (12) facing the folding groove (3). The surface of the inclined plate (17) at the initial position and the surface at the end position gradually protrude outward. A limiting rod (20) is fixedly installed on the end face of the slide (7) facing the mounting groove (5). The limiting rod (20) is detachably inserted into the locking hole (9). The locking hole (9) is correspondingly opened on the side of the cutting gun (2).

6. A semi-automatic arc cutting device for mining according to claim 5, characterized in that, The turntable (12) and the slide (7) are provided with magnetic rings (14) with opposite magnetic properties at the middle of their corresponding end faces.

7. A semi-automatic arc cutting device for mining according to claim 6, characterized in that, The power-off mechanism includes a power-connecting post (15) fixedly installed at the center of the end face of the turntable (12). The power-connecting post (15) is detachably inserted into the power-connecting sleeve (16). The power-connecting sleeve (16) is movably inserted into the center of the slide plate (7). The bottom end of the power-connecting sleeve (16) is inserted into the fixed sleeve (23) and fixedly connected to the driven rotating post (22). The driven rotating post (22) is rotatably connected to the fixed sleeve (23). A bidirectional slide rail (25) is symmetrically arranged on the side of the driven rotating post (22) away from the power-connecting sleeve (16). A slider (27) is slidably connected in the bidirectional slide rail (25). The slider (27) is fixedly installed on one end face of the driving rotating post (24) that is in contact with the driven rotating post (22). A wire roller (8) is fixedly connected to the other end face of the driving rotating post (24). A return spring (26) is connected between the driving rotating post (24) and the driven rotating post (22).

8. A semi-automatic arc cutting device for mining according to claim 7, characterized in that, The slider (27) protrudes outward from its initial position within the bidirectional slide rail (25). The end position of the slider (27) sliding within the bidirectional slide rail (25) is attached to the surface of the driven rotating column (22). The unidirectional sliding angle of the slider (27) within the bidirectional slide rail (25) is 0°-45°. After the slider (27) rotates more than 45°, it drives the driven rotating column (22) to rotate together.

9. A semi-automatic arc cutting device for mining according to claim 8, characterized in that, Both the active rotating column (24) and the driven rotating column (22) have through holes (28) at their center for the insertion of wires (10).

10. A semi-automatic arc cutting device for mining according to claim 9, characterized in that, The bottom of the cutting gun (2) is provided with a ferrule (11) whose size is adapted to the wire roller (8).

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