A transient electromagnetic advanced detection system for a coal mine tunneling face

Abstract

The application provides a coal mine tunneling face transient electromagnetic advanced detection system, which comprises a detection device, wherein the detection device comprises a mounting box, an upper cover, a receiving and transmitting mechanism and a transient electromagnetic instrument arranged on the inner side of the mounting box, the receiving and transmitting mechanism comprises a folding frame and a receiving and transmitting coil, the folding frame comprises a first rotating rod, a movable rod and a U-shaped frame, the movable rod is symmetrically fixedly installed at the two ends of the first rotating rod, and the first rotating rod is rotatably installed in the inner side of one end of the mounting box. Through rotation adjustment of the U-shaped frame and the solenoid, the receiving and transmitting coil can be unfolded, the angle of the receiving and transmitting mechanism can be rotationally adjusted through the adjusting mechanism, the coal mine tunneling face can be conveniently detected in multiple angles, one person can conveniently operate, time and labor are saved, and through cooperation of the linkage mechanism and the adjusting mechanism, the transient electromagnetic instrument and the receiving and transmitting coil can be conveniently retracted into the inner side of the mounting box, and the transient electromagnetic instrument and the receiving and transmitting coil can be conveniently stored and carried.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine tunneling face advanced detection, in particular to a coal mine tunneling face transient electromagnetic advanced detection system. BACKGROUND

[0002] The advanced detection of the coal mine tunneling face has great significance for the safety production of the coal mine, and the advanced detection of the coal mine tunneling face is usually carried out by using the transient electromagnetic method, the transient electromagnetic method is to use a non-grounded loop or a grounded electrode to send a pulse type or square wave type primary electromagnetic field to the coal mine tunneling face, and to observe the secondary electromagnetic field generated by the underground eddy current induced by the pulse electromagnetic field by using a coil or a grounded electrode, and to analyze the geological problem by analyzing the spatial and temporal distribution of the secondary field.

[0003] In the prior art, a transient electromagnetic instrument is used to perform advanced detection on the coal mine tunneling face, the transient electromagnetic instrument comprises a main machine, a receiving wire frame and a transmitting wire frame, the receiving wire frame and the transmitting wire frame are electrically connected between the main machine through a cable, but when performing advanced detection on the coal mine tunneling face, the receiving wire frame and the transmitting wire frame need to be supported by using a combination rod, so as to facilitate detection at different angles, and the combination rod needs to be disassembled and assembled before and after use, and multiple people need to cooperate to operate the transient electromagnetic instrument and the transmitting wire frame and the receiving wire frame, the operation is relatively complex, and it is not convenient to store the combination rod, the transmitting wire frame, the receiving wire frame and the main machine.

[0004] Therefore, the present application provides a coal mine tunneling face transient electromagnetic advanced detection system. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide a coal mine tunneling face transient electromagnetic advanced detection system to solve the problems in the background art, the present application can unfold the receiving and transmitting coil by rotating the U-shaped frame and the screw pipe, and can rotate and adjust the angle of the receiving and transmitting mechanism by the adjusting mechanism, so as to facilitate advanced detection of the coal mine tunneling face at multiple angles, facilitate single-person operation, save time and effort, and facilitate the transient electromagnetic instrument and the receiving and transmitting coil into the inside of the installation box by the cooperation of the linkage mechanism and the adjusting mechanism, so as to store and carry the transient electromagnetic instrument and the receiving and transmitting coil.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: A coal mine tunneling face transient electromagnetic advanced detection system, comprising a detection device, the detection device comprises a mounting box, an upper cover and a transceiver mechanism and a transient electromagnetic instrument arranged inside the mounting box, the transceiver mechanism comprises a folding frame and a transceiver coil, the folding frame comprises a first rotating rod, a movable rod and a U-shaped frame, the movable rod is symmetrically fixedly installed at both ends of the first rotating rod, the first rotating rod is rotatably installed inside one end of the mounting box, an angle sensor is installed at the rear end of the first rotating rod, a connecting rod is movably installed at the top end of the movable rod through a rotating shaft, the top end of the connecting rod is movably connected with the U-shaped frame through a rotating shaft, the transceiver coil is installed inside the movable rod and the U-shaped frame through a fixing ring, the transient electromagnetic instrument is movably installed at the other end of the mounting box through an adjusting plate and a second rotating rod, adjusting mechanisms are arranged at the front ends of the first rotating rod and the second rotating rod, a linkage mechanism is arranged between the adjusting mechanisms, the adjusting mechanisms comprise a fixed box, a first shaft rod, a second shaft rod and a worm gear, the linkage mechanism comprises a fixed plate, a sliding plate and a rotating cylinder, the rotating cylinder is slidably installed outside the opposite ends of the first shaft rod and the second shaft rod through a regular polygon hole formed in the inside thereof.

[0007] Further, the angle sensor is fixedly installed inside the rear end of the mounting box, external threads are formed on the outer sides of both ends of the U-shaped frame and the upper end of the movable rod, and a screw pipe is screwed and installed on the outer sides of both ends of the U-shaped frame and the upper end of the movable rod.

[0008] Further, the transceiver coil is fixedly installed on one side of the fixing ring, the fixing ring is fixedly installed on the outer sides of both ends of the U-shaped frame and the upper end of the movable rod, and the transceiver coil is electrically connected between the transceiver coil and the transient electromagnetic instrument through a cable.

[0009] Further, the fixed box is fixedly installed on both sides of the front end of the mounting box, the front ends of the first rotating rod and the second rotating rod are arranged inside the fixed box, and the worm gear is fixedly installed inside the fixed box corresponding to the front ends of the first rotating rod and the second rotating rod.

[0010] Further, the first shaft rod and the second shaft rod are respectively transversely rotatably installed inside the fixed boxes on both sides, a servo motor is fixedly installed on the outer wall of one side of the fixed box, and the output shaft of the servo motor is fixedly connected with one end of the first shaft rod.

[0011] Further, first and second worms are fixedly arranged on one end of the first shaft rod and the second shaft rod corresponding to the inside of the fixed box, the worm gear is movably arranged inside the fixed box, and the first and second worms are movably arranged with the worm gear.

[0012] Further, the fixed plate is fixedly arranged between the two sides of the front end of the mounting box corresponding to the fixed box, the other end of the second shaft is rotatably arranged in the fixed plate, and the top end and the bottom end of the fixed plate are slidably arranged with the limiting rod above and below the second shaft.

[0013] Further, the sliding plate is vertically fixedly arranged at one end of the limiting rod corresponding to the outer side of the second shaft, one end of the rotating cylinder is rotatably arranged at the inner center position of the sliding plate, and the other side of the sliding plate is fixedly arranged with the spring between the fixed plate corresponding to the outer side of the second shaft.

[0014] Further, the other end of the first shaft and the second shaft is fixedly arranged with a regular polygon rod, and the regular polygon rod is slidably arranged in the two ends of the rotating cylinder.

[0015] Further, the mounting box is fixedly arranged with universal wheels at the bottom four corner positions, the upper cover is fixedly arranged at the top of the mounting box through a threaded knob, the second rotating rod is rotatably arranged in the other end of the mounting box, the adjusting plate is fixedly arranged at the top end of the second rotating rod, and the transient electromagnetic instrument is fixedly arranged at one side of the top end of the adjusting plate.

[0016] The coal mine tunneling face transient electromagnetic advanced detection system has the advantages that the coal mine tunneling face transient electromagnetic advanced detection system comprises a mounting box, an upper cover, universal wheels, an adjusting mechanism, a linkage mechanism, a first rotating rod, a transceiving mechanism, a second rotating rod, a transceiving coil, an adjusting plate, a transient electromagnetic instrument, a movable rod, a connecting rod, a U-shaped frame, a screw pipe, a fixed ring, a servo motor, a first shaft, a second shaft, a first worm, a second worm, a worm wheel, a fixed plate, a limiting rod, a sliding plate, a rotating cylinder and an angle sensor.

[0017] 1. The coal mine tunneling face transient electromagnetic advanced detection system is folded through the adjustment of the connecting rod, the U-shaped frame and the screw rod, so that the volume of the transceiving mechanism and the transceiving coil is reduced, the first worm and the second worm are rotated through the servo motor, the first shaft and the second shaft, the first worm and the second worm and the worm wheel are meshed, so that the first rotating rod and the second rotating rod are conveniently rotated and adjusted, the transient electromagnetic instrument, the transceiving coil and the transceiving mechanism are conveniently stored in the mounting box, the mounting box and the upper cover are conveniently carried, the first rotating rod and the second rotating rod are conveniently rotated and adjusted through the adjusting mechanism and the linkage mechanism, the transient electromagnetic instrument and the transceiving coil are conveniently unfolded and operated at the same time, and the system is conveniently used for the advanced detection of the coal mine tunneling face.

[0018] 2. The coal mining face transient electromagnetic advance detection system adjusts the movement of the slide plate, so that the rotating cylinder is separated from the first shaft, the angle of the transceiving mechanism and the transceiving coil is adjusted separately, the self-locking ability exists between the first worm, the second worm and the worm wheel, the stability of the transceiving mechanism is improved, and the coal mining face is conveniently detected in advance at different angles.

[0019] 3. The coal mining face transient electromagnetic advance detection system increases the protection of the transient electromagnetic instrument, the transceiving coil and the transceiving mechanism through the installation box and the upper cover, improves the safety of the system, and through the installation of the universal wheel at the bottom of the installation box, the device is conveniently moved and carried. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure diagram of the coal mining face transient electromagnetic advance detection system of the application;

[0021] Figure 2 It is a front view of the coal mining face transient electromagnetic advance detection system of the application;

[0022] Figure 3 It is a structure diagram of the coal mining face transient electromagnetic advance detection system of the application in an unfolded state;

[0023] Figure 4 It is a cross-sectional view of the coal mining face transient electromagnetic advance detection system of the application in an unfolded state;

[0024] Figure 5 It is a linkage mechanism structure diagram of the coal mining face transient electromagnetic advance detection system of the application;

[0025] Figure 6 It is a structure diagram of the coal mining face transient electromagnetic advance detection system of the application; Figure 5 It is an enlarged view of A in the coal mining face transient electromagnetic advance detection system of the application;

[0026] Figure 7 It is a transceiving mechanism structure diagram of the coal mining face transient electromagnetic advance detection system of the application;

[0027] Figure 8 It is an upper cover structure diagram of the coal mining face transient electromagnetic advance detection system of the application;

[0028] Figure 9 It is a transient electromagnetic instrument structure diagram of the coal mining face transient electromagnetic advance detection system of the application;

[0029] In the figure: 1, installation box; 2, upper cover; 3, universal wheel; 4, adjusting mechanism; 5, linkage mechanism; 6, first rotating rod; 7, transceiver mechanism; 8, second rotating rod; 9, transceiver coil; 10, adjusting plate; 11, transient electromagnetic instrument; 12, movable rod; 13, connecting rod; 14, U-shaped frame; 15, solenoid; 16, fixed ring; 17, servo motor; 18, first shaft rod; 19, second shaft rod; 20, first worm; 21, second worm; 22, worm gear; 23, fixed plate; 24, limiting rod; 25, sliding plate; 26, rotating cylinder; 27, angle sensor. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0031] Please refer to Figures 1 to 9 The present application provides a technical solution: a coal mine tunneling face transient electromagnetic advanced detection system, comprising a detection device, the detection device comprising an installation box 1, an upper cover 2 and a transceiver mechanism 7 and a transient electromagnetic instrument 11 arranged inside the installation box 1, the transceiver mechanism 7 comprising a folding frame and a transceiver coil 9, the folding frame comprising a first rotating rod 6, a movable rod 12 and a U-shaped frame 14, the movable rod 12 being symmetrically fixedly installed at both ends of the first rotating rod 6, the first rotating rod 6 being rotatably installed inside one end of the installation box 1, the rear end of the first rotating rod 6 being provided with an angle sensor 27, the top end of the movable rod 12 being movably provided with a connecting rod 13 through a rotating shaft, the top end of the connecting rod 13 being movably connected with the U-shaped frame 14 through a rotating shaft, the transceiver coil 9 being installed inside the movable rod 12 and the U-shaped frame 14 through a fixed ring 16, the transient electromagnetic instrument 11 being movably installed at the other end of the installation box 1 through an adjusting plate 10 and a second rotating rod 8, the front ends of the first rotating rod 6 and the second rotating rod 8 being provided with adjusting mechanisms 4, the adjusting mechanisms 4 being provided with a linkage mechanism 5 therebetween, the adjusting mechanism 4 comprising a fixed box, a first shaft rod 18, a second shaft rod 19 and a worm gear 22, the linkage mechanism 5 comprising a fixed plate 23, a sliding plate 25 and a rotating cylinder 26, the rotating cylinder 26 being slidably installed outside the opposite ends of the first shaft rod 18 and the second shaft rod 19 through a regular polygon hole formed in the inside thereof, the cooperation of the adjusting mechanism 4 and the linkage mechanism 5 facilitates the simultaneous rotation adjustment of the first rotating rod 6 and the second rotating rod 8, so that the first rotating rod 6 and the second rotating rod 8 respectively drive the transient electromagnetic instrument 11 and the transceiver mechanism 7 to rotate towards the inside of the installation box 1, facilitating the storage of the transient electromagnetic instrument 11 and the transceiver mechanism 7, and also allowing the rotation adjustment of the transceiver mechanism 7 alone through the adjustment of the linkage mechanism 5, facilitating the advanced detection of the coal mine tunneling face through different angles.

[0032] The angle sensor 27 is fixedly installed in the rear end of the mounting box 1, external threads are formed on the outer sides of the two ends of the U-shaped frame 14 and the upper end of the movable rod 12, the screw pipes 15 are screw-connectedly installed on the outer sides of the two ends of the U-shaped frame 14 and the upper end of the movable rod 12, the transceiving coil 9 is fixedly installed on one side of the fixed ring 16, the fixed ring 16 is fixedly installed on the outer sides of the two ends of the U-shaped frame 14 and the upper end of the movable rod 12, the transceiving coil 9 is electrically connected between the transient electromagnetic instrument 11 through a cable, the screw pipe 15 can be installed on the outer sides of the connecting rod 13, the movable rod 12 and the U-shaped frame 14 by rotating adjustment of the screw pipe 15, the U-shaped frame 14, the movable rod 12 and the connecting rod 13 are conveniently limited, the coal mining face is conveniently and subsequently detected in advance by the transceiving coil 9, the transceiving mechanism 7 is conveniently folded, the volume of the transceiving mechanism 7 is reduced, and the transceiving mechanism 7 is conveniently and subsequently folded and stored.

[0033] The fixed box is fixedly installed on both sides of the front end of the mounting box 1, the front ends of the first rotating rod 6 and the second rotating rod 8 are arranged in the interior of the fixed box, the worm wheel 22 is fixedly installed at the front ends of the first rotating rod 6 and the second rotating rod 8 corresponding to the interior of the fixed box, the first shaft rod 18 and the second shaft rod 19 are respectively transversely rotatably installed in the interior of the fixed box on both sides, the outer wall of one side of the fixed box is fixedly installed with the servo motor 17, the output shaft of the servo motor 17 is fixedly connected with one end of the first shaft rod 18, one end of the first shaft rod 18 and the second shaft rod 19 is respectively fixedly provided with the first worm 20 and the second worm 21 corresponding to the interior of the fixed box, the worm wheel 22 is movably arranged in the interior of the fixed box, the first worm 20 and the second worm 21 are all arranged in meshing with the worm wheel 22, the fixed plate 23 is fixedly arranged between the fixed boxes corresponding to both sides of the front end of the mounting box 1, the other end of the second shaft rod 19 is rotatably installed in the interior of the fixed plate 23, the top end and the bottom end of the fixed plate 23 are slidingly provided with the limiting rod 24 corresponding to the upper side and the bottom of the second shaft rod 19, the sliding plate 25 is vertically fixedly installed at one end of the limiting rod 24 corresponding to the outer side of the second shaft rod 19, one end of the rotating cylinder 26 is rotatably installed at the central position in the interior of the sliding plate 25, the other side of the sliding plate 25 is fixedly installed with the spring between the fixed plate 23 corresponding to the outer side of the second shaft rod 19, the other end of the first shaft rod 18 and the second shaft rod 19 is fixedly provided with a regular polygonal rod, the regular polygonal rod is slidingly installed in the interior of both ends of the rotating cylinder 26, the servo motor 17 and the matched circuit thereof can be used for rotatingly adjusting the first shaft rod 18 and the second shaft rod 19, the first shaft rod 18 and the second shaft rod 19 drive the first worm 20 and the second worm 21 to rotate, the first worm 20 and the second worm 21 drive the first rotating rod 6 and the second rotating rod 8 to rotate by the meshing effect of the worm wheel 22, the transmitting and receiving mechanism 7, the transient electromagnetic instrument 11 and the transmitting and receiving coil 9 can be conveniently rotated and stored in the interior of the mounting box 1, the transmitting and receiving mechanism 7, the transient electromagnetic instrument 11 and the transmitting and receiving coil 9 can be conveniently adjusted out of the interior of the mounting box 1, the subsequent advanced detection of the coal mining face is facilitated; the sliding plate 25 drives the rotating cylinder 26 to move and separate from the regular polygonal rod arranged at one end of the first shaft rod 18 by the movement adjustment of the sliding plate 25, the angle of the first rotating rod 6, the transmitting and receiving coil 9 and the horizontal plane can be conveniently adjusted, the advanced detection of the coal mining face at different angles is facilitated, the operation is simple and convenient, time and labor are saved.

[0034] The mounting box 1 is provided with universal wheels 3 at the bottom corners, the upper cover 2 is fixedly installed on the top of the mounting box 1 by screwing, the second rotating rod 8 is rotatably installed in the other end of the mounting box 1, the adjusting plate 10 is fixedly installed on the top end of the second rotating rod 8, and the transient electromagnetic instrument 11 is fixedly installed on one side of the top end of the adjusting plate 10.

[0035] When the coal tunneling face transient electromagnetic advanced detection system is used, the threaded knob is unscrewed and the upper cover 2 is disassembled, and the installation box 1 is pushed to move, the installation box 1 moves through the universal wheel 3, the system is moved to the position near the coal tunneling face which needs to be detected, the servo motor 17 and the matching circuit are electrically connected with the external power supply through the control switch, the servo motor 17 is started through the control switch, the servo motor 17 drives the first shaft 18 to rotate, at this time the slide plate 25 is in the most right position under the elastic force of the spring, and the first shaft 18 and the second shaft 19 are inserted and installed in the inside of the rotating cylinder 26, the first shaft 18 can drive the second shaft 19 to rotate synchronously through the limiting action of the regular polygon rod and the rotating cylinder 26, the first shaft 18 and the second shaft 19 drive the first worm 20 and the second worm 21 to rotate in the same direction, the threads of the first worm 20 and the second worm 21 are opposite, the first worm 20 and the second worm 21 can drive the first rotating rod 6 and the second rotating rod 8 to rotate in opposite directions through the meshing action of the worm gear 22, the first rotating rod 6 drives the transceiver mechanism 7 and the receiving coil 9 to rotate out of the inside of the installation box 1 and adjust to the vertical state, the second rotating rod 8 drives the transient electromagnetic instrument 11 to rotate out of the inside of the installation box 1 through the adjusting plate 10 and adjust to the vertical state, the U-shaped frame 14 is adjusted to be in the same vertical plane with the connecting rod 13 and the movable rod 12 through the connecting rod 13 and the shaft rod rotating the U-shaped frame 14 at the top of the movable rod 12, the screw pipe 15 is rotated, the screw pipe 15 is screwed and moved with the U-shaped frame 14 and the movable rod 12, one end of the screw pipe 15 moves outside the two ends of the connecting rod 13, which is convenient for limiting the U-shaped frame 14 and the connecting rod 13, can improve the stability of the transceiver mechanism 7, and is convenient for opening the receiving coil 9, the receiving coil 9 can emit electromagnetic field and receive secondary electromagnetic field through the operation of the transient electromagnetic instrument 11, and analyze it; slide the slide plate 25 to the left, the slide plate 25 drives the limiting rod 24 to move in the inside of the fixed plate 23 and compresses the spring, the slide plate 25 drives the rotating cylinder 26 to move to the left, the regular polygon rod on the first shaft 18 slides out of the inside of the rotating cylinder 26, which is convenient for separating the first shaft 18 and the second shaft 19, the first shaft 18 and the first worm 20 are driven to rotate through the servo motor 17 and the matching circuit, the first worm 20 drives the first rotating rod 6 to rotate through the meshing action with the worm gear 22, the first rotating rod 6 drives the receiving coil 9 to rotate through the transceiver mechanism 7, which is convenient for adjusting the angle between the receiving coil 9 and the horizontal plane, the rotating angle of the first rotating rod 6, the transceiver mechanism 7 and the receiving coil 9 is detected and controlled through the angle sensor 27, which is convenient for multi-angle detection of the coal tunneling face from different angles, and is convenient for improving the accuracy of the advanced detection of the coal tunneling face.When not in use, the first rotating rod 6 is rotated by the servo motor 17 and its matching circuit, and the transceiving mechanism 7 and the transceiving coil 9 are rotated by the first rotating rod 6 to adjust them to the vertical state, the slide plate 25 is loosened, the slide plate 25 drives the rotating cylinder 26 to reset under the elastic force of the spring and the limiting action of the limiting rod 24, so that the regular polygon rod on the first shaft rod 18 is inserted into the inside of the rotating cylinder 26, the first shaft rod 18 drives the second shaft rod 19 to rotate synchronously through the linkage mechanism 5, the transceiving coil 9, the transceiving mechanism 7 and the transient electromagnetic instrument 11 are conveniently collected into the inside of the installation box 1, and the upper cover 2 is fixedly installed in the inside of the installation box 1, the protection of the transceiving coil 9 and the transient electromagnetic instrument 11 is facilitated through the installation box 1 and the upper cover 2, the system is also facilitated to move and carry, the operation is simple, time and labor are saved, and the model of the angle sensor 27 is GL60.

[0036] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0037] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A coal mine heading face transient electromagnetic advanced detection system comprising a detection device, characterized in that, The detection device includes a mounting box (1), an upper cover (2), a transceiver mechanism (7) and a transient electromagnetic instrument (11) arranged on the inner side of the mounting box (1), the transceiver mechanism (7) includes a folding frame and a transceiver coil (9), the folding frame includes a first rotating rod (6), a movable rod (12) and a U-shaped frame (14), the movable rod (12) is symmetrically fixedly installed at the two ends of the first rotating rod (6), the first rotating rod (6) is rotatably installed in the inner side of one end of the mounting box (1), the rear end of the first rotating rod (6) is provided with an angle sensor (27), the top end of the movable rod (12) is movably installed with a connecting rod (13) through a rotating shaft, the top end of the connecting rod (13) is movably connected with the U-shaped frame (14) through a rotating shaft, the transceiver coil (9) is installed on the inner side of the movable rod (12) and the U-shaped frame (14) through a fixing ring (16), the transient electromagnetic instrument (11) is movably installed on the other end of the mounting box (1) through an adjusting plate (10) and a second rotating rod (8), the front ends of the first rotating rod (6) and the second rotating rod (8) are provided with an adjusting mechanism (4), the adjusting mechanism (4) is provided with a linkage mechanism (5) therebetween, the adjusting mechanism (4) includes a fixed box, a first shaft rod (18), a second shaft rod (19) and a worm wheel (22), the linkage mechanism (5) includes a fixed plate (23), a sliding plate (25) and a rotating cylinder (26), the rotating cylinder (26) is slidably installed on the outer side of the opposite ends of the first shaft rod (18) and the second shaft rod (19) through a regular polygon hole formed in the inner side thereof, the first shaft rod (18) and the second shaft rod (19) are respectively transversely rotatably installed in the inner sides of the fixed boxes on the two sides, a servo motor (17) is fixedly installed on the outer wall of the fixed box on one side, the output shaft of the servo motor (17) is fixedly connected with one end of the first shaft rod (18), first and second worms (20) and (21) are fixedly arranged on the one ends of the first and second shaft rods (18) and (19) corresponding to the inner sides of the fixed boxes, the worm wheel (22) is movably arranged in the inner side of the fixed box, the first and second worms (20) and (21) are movably arranged with the worm wheel (22), the fixed plate (23) is fixedly arranged between the front ends of the fixed boxes on the two sides corresponding to the fixed boxes on the two sides, the other end of the second shaft rod (19) is rotatably installed in the inner side of the fixed plate (23), limit rods (24) are slidably arranged on the top and bottom of the fixed plate (23) corresponding to the upper and bottom of the second shaft rod (19), a sliding plate (25) is vertically fixedly installed on one end of the limit rod (24) corresponding to the outer side of the second shaft rod (19), one end of the rotating cylinder (26) is rotatably installed at the central position in the inner side of the sliding plate (25), springs are fixedly installed on the outer side of the second shaft rod (19) between the other side of the sliding plate (25) and the fixed plate (23).

2. The coal mine tunneling face transient electromagnetic advanced detection system according to claim 1, characterized in that: The angle sensor (27) is fixedly installed inside the rear end of the mounting box (1), external threads are formed on the outer sides of the two ends of the U-shaped frame (14) and the upper end of the movable rod (12), and the screw pipes (15) are screwed to the outer sides of the two ends of the U-shaped frame (14) and the upper end of the movable rod (12).

3. The coal mine heading face transient electromagnetic advanced detection system according to claim 2, characterized in that: The transceiving coil (9) is fixedly installed on one side of the fixed ring (16), the fixed ring (16) is fixedly installed on the outer sides of the two ends of the U-shaped frame (14) and the upper end of the movable rod (12), and the transceiving coil (9) is electrically connected between the cable and the transient electromagnetic instrument (11).

4. The coal mine heading face transient electromagnetic advanced detection system according to claim 1, characterized in that: The fixed box is fixedly installed on the two sides of the front end of the mounting box (1), the front ends of the first rotating rod (6) and the second rotating rod (8) are arranged inside the fixed box, and the worm wheel (22) is fixedly installed inside the front ends of the first rotating rod (6) and the second rotating rod (8) corresponding to the fixed box.

5. The coal mine heading face transient electromagnetic advanced detection system according to claim 1, characterized in that: The other ends of the first shaft rod (18) and the second shaft rod (19) are fixedly provided with regular polygon rods, and the regular polygon rods are slidingly installed inside the two ends of the rotating cylinder (26).

6. The coal mine heading face transient electromagnetic advanced detection system according to claim 1, characterized in that: The mounting box (1) is provided with universal wheels (3) fixedly installed at the four corner positions of the bottom, the upper cover (2) is fixedly installed on the top of the mounting box (1) through a threaded knob, the second rotating rod (8) is rotatably installed inside the other end of the mounting box (1), the adjusting plate (10) is fixedly installed on the top end of the second rotating rod (8), and the transient electromagnetic instrument (11) is fixedly installed on one side of the top end of the adjusting plate (10).

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