CN113250709B - Coil drive system - Google Patents

Abstract

The present invention relates to construction equipment, and specifically to a rotary tube drive system, including a frame, a plurality of rotary tubes connected in sequence along the excavation direction, and a rotary tube drive mechanism installed on the frame and used to drive the rotary tube body to rotate; the rotary tube drive mechanism includes an arc-shaped slide fixedly installed on both sides of the frame, an active gear shaft and a driving rotary tube, the arc-shaped slide engages with the driving rotary tube, and the active gear shaft engages with the driving rotary tube; the rotary tube drive mechanism also includes a driving source for driving the active gear shaft to rotate. The rotary tube drive system of the present application converts the source power into rotary cutting and pressure of the rotary tube system to achieve forced push-pull, and the push-pull speed of the driving rotary tube is only related to the rotation speed. At the same time, due to the amplification effect of the spiral component, a strong push-pull force will be generated, realizing the invention purposes of core power conversion, forced controllable process, and reaction force transmission.

Description

Coil drive system

Technical Field

The invention relates to construction equipment, in particular to a rotary tube driving system.

Background Art

Existing underground pipeline laying construction methods without excavating the ground mainly include: pipe jacking method, micro-tunnel method, horizontal directional drilling, horizontal spiral drilling, horizontal push drilling, impact method, ramming method, etc. They all have their own application scenarios and advantages and disadvantages, and the pipe jacking method is the closest to the present invention.

The existing patent number is CN202021126215.5, and the name is a patent document of a jacking system for jacking pipe construction. It discloses a rotary pipe drive system, which mainly includes a working platform, a power source, which is arranged at the end of the working platform and supported by a power source bracket; a driving mechanism, the end of the driving mechanism is connected to the power source through an adjustment pad; a jacking iron assembly, which includes at least three types of jacking irons. After the three types of jacking irons are connected, a jacking iron assembly with a frame structure in the middle is formed; a guide rail assembly, which is used to support the jacking iron assembly. Under the action of the driving mechanism, the jacking iron assembly drives the jacking pipe to achieve jacking. The driving mechanism cannot be guided, the transmission mechanism has poor bite force, and the rotary pipe is prone to slippage.

Summary of the invention

The purpose of the present invention is to address the deficiencies in the prior art and to provide a rotary tube driving system with high working efficiency and strong transmission structure.

The objective of the present invention is achieved through the following technical solutions: The present application provides a rotary tube driving system, which includes a frame, a plurality of rotary tubes connected in sequence along the excavation direction, and a rotary tube driving mechanism installed on the frame and used to drive the rotary tube body to rotate; the rotary tube driving mechanism includes an arc-shaped slide plate fixedly installed on both sides of the frame, a driving gear shaft and a driving rotary tube, the arc-shaped slide plate is meshed with the driving rotary tube, and the driving gear shaft is meshed with the driving rotary tube; the rotary tube driving mechanism also includes a driving source for driving the driving gear shaft to rotate.

Among them, the driving source is a driving motor, and the driving motor is connected to the driving gear shaft through a speed change mechanism.

Among them, the outer peripheral side surface of the driving spiral tube is provided with a plurality of engaging teeth arranged in a spiral pattern with the jacking pipe direction as the axial direction, and the inner side surface of each arc-shaped slide plate is provided with a slide groove arranged in a spiral pattern with the jacking pipe direction as the axial direction, and the engaging teeth are inserted into the slide groove, and the active gear shaft is fixedly installed on the frame with the jacking pipe direction as the axial direction, and the active gear shaft meshes with the engaging teeth.

Among them, the ratio of the length of the arc-shaped slide plate to the circumference of the driving coil is 4:1.

Among them, the multiple spiral tubes include a first spiral tube at the starting end, a third spiral tube at the end, and a second spiral tube and a slag spiral tube located between the first and third spiral tubes. A drill disc is fixedly installed in the starting end of the first spiral tube, and the third spiral tube is fixedly connected to the spiral tube driving mechanism.

Wherein, the front end of the driving coil extends out a mounting portion fixedly connected to the third coil.

Among them, the drill disc includes a plurality of cutting blocks fixedly installed on the working surface of the drill disc, and the plurality of cutting blocks are arranged at intervals along the radial direction of the drill disc; the drill disc is also provided with a plurality of excavation holes arranged at intervals along the radial direction of the drill disc, and the opening sizes of the plurality of excavation holes gradually increase from the inside to the outside along the radial direction of the drill disc; the drill disc is provided with a plurality of hob holes arranged at intervals along the radial direction of the drill disc, and a hob mechanism is rotatably installed in each hob hole; the drill disc includes a cylindrical base plate, and at least one first lubrication hole is provided on the outer peripheral side surface of the base plate, and a lubricating liquid containing tank is formed on the inner bottom surface of the base plate, and the outlet of the lubricating liquid containing tank is connected with the first lubrication hole through a pipeline, and the inlet of the lubricating liquid containing tank is fixedly installed with a first rotating joint.

Among them, the slag rotary tube is clamped with the first rotary tube, and a first pipe connecting groove is opened at the end of the first rotary tube facing the slag rotary tube. One end of the slag rotary tube facing the first pipe connecting groove protrudes outward to form a first pipe joint, and the first pipe joint and the first pipe connecting groove are both arranged in a dovetail shape.

The first pipe joint is inserted into the first pipe joint groove, a clamping gap is left between one side of the first pipe joint and the groove wall of the first pipe joint groove, an insert plate is arranged in the clamping gap, and spring latches that can be telescopically moved are installed at both ends of the insert plate facing the first pipe joint groove and the first pipe joint, and a clamping pin hole for inserting the spring latch is provided on the end surface of the first pipe joint facing the spring latch and the groove bottom of the first pipe joint groove facing the spring latch.

The slag rotary discharge pipe comprises a pipe body and an inner cylinder mounted inside the pipe body, and a plurality of spiral blades arranged at intervals are evenly distributed between the outer peripheral side surface of the inner cylinder and the inner side surface of the pipe body.

Beneficial effects of the present invention: Compared with the prior art, the rotary tube driving system of the present application converts the source power into rotary cutting and pressure of the rotary tube system to achieve forced push-pull, and the push-pull speed of the driving rotary tube is only related to the rotation speed. At the same time, due to the amplification effect of the spiral component, a strong push-pull force will be generated, thereby achieving the invention purposes of core power conversion, forced controllable process, and reaction force transmission.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

FIG. 1 is a schematic structural diagram of a coil drive system in this embodiment.

FIG. 2 is a schematic diagram of the structure of the coil system in this embodiment.

FIG. 3 is a front view of the drill disc in this embodiment.

FIG. 4 is a rear view of the drill disc in this embodiment.

FIG. 5 is a cross-sectional view of the drill disc in this embodiment.

FIG. 6 is an enlarged view of point A in FIG. 2 .

FIG. 7 is a cross-sectional view of the slag rotary discharge pipe in this embodiment.

FIG. 8 is an exploded view of the second coil in this embodiment.

FIG. 9 is a cross-sectional view of the lubrication joint mechanism in this embodiment.

FIG. 10 is an enlarged view of point B in FIG. 2 .

FIG. 11 is a schematic diagram of the electric pin plate mechanism in this embodiment.

FIG. 12 is a cross-sectional view of the second coil and the third coil in this embodiment.

FIG. 13 is a schematic diagram of the structure of the rotary tube driving machine in this embodiment.

FIG14 is a cross-sectional view taken along line A-A in FIG13 .

FIG. 15 is a cross-sectional view of the driving coil in this embodiment.

FIG. 16 is a schematic diagram of the structure of the driving coil in this embodiment.

FIG17 is a cross-sectional view taken along line B-B in FIG13 .

Description of the drawings: frame 1, soil discharge system 11, lifting and transporting mechanism 12, first rotary tube 2, first pipe connection groove 21, positioning block 22, soil rotary tube 3, first pipe joint 31, positioning groove 32, inner cylinder 33, steel beam 34, spiral blade 35, second rotary tube 4, lubrication joint mechanism 40, sealing plate 41, second lubrication hole 42, inner cylinder 43, second rotary joint 44, second pipe connection groove 45, third rotary tube 5, pin plate hole 51, rotary tube driving mechanism 6, arc slide plate 61, active gear shaft 62, drive Moving rotary tube 63, mounting portion 64, engaging teeth 65, slide groove 66, pin plate body 7, electric push rod 71, telescopic rod 72, wedge block 73, mounting ear 74, wedge hole 75, first inclined surface 76, second inclined surface 77, support frame 78, guide column 79, return spring 70, drill disc 8, cutting block 81, hob hole 82, hob mechanism 83, unearthed hole 84, locking bolt 85, base plate 86, first lubrication hole 87, lubricating liquid containing chamber 88, first rotary joint 89, panel 9, spring latch 91.

DETAILED DESCRIPTION

The present invention is further described in conjunction with the following examples.

The specific implementation of the coil drive system of the present invention is shown in FIG1 , which includes a frame 1, a plurality of coils connected in sequence along the excavation direction, a coil drive mechanism 6 installed on the frame 1 and used to drive the coil 63 body to rotate, and a hoisting and transporting mechanism 12 for hoisting is also provided on the side of the frame 1. It should be noted that the hoisting and transporting mechanism 12 mainly completes the tasks of coil equipment, pipe laying hoisting and slag removal from the well. Existing mature equipment such as crawler cranes can be equipped as needed.

In this embodiment, in combination with Figure 2, the multiple coils include a first coil 2 located at the starting end, a third coil 5 located at the end, and a second coil 4 and a slag rotary pipe 3 located between the first coil 2 and the second coil 4. A drill disc 8 is fixedly installed in the starting end of the first coil 2, and the third coil 5 is fixedly connected to the coil driving mechanism 6.

In this embodiment, in conjunction with FIG3 , the drill plate 8 includes a plurality of cutter blocks 81 fixedly mounted on the working surface of the drill plate 8, and the plurality of cutter blocks 81 are arranged at intervals along the radial direction of the drill plate 8. In addition, the drill plate 8 is provided with a plurality of roller cutter holes 82 arranged at intervals along the radial direction of the drill plate 8, and a roller cutter mechanism 83 is rotatably mounted in each roller cutter hole 82. It should be noted that the number of rows and the number of the cutter blocks 81 and the roller cutter mechanism 83 are set according to calculations, and can be indestructible under the drive of the coil.

In conjunction with FIG. 4 , it should be noted that the drill disc 8 is made of high-strength steel, and the drill disc 8 is fixedly installed inside the first coil 2, and is mainly fixed inside the first coil 2 by means of locking bolts 85. The drill disc 8 is also provided with a plurality of excavation holes 84 arranged at intervals along the radial direction of the drill disc 8. The excavation holes 84 are mainly provided to transfer the excavated slag to the inside of the coil, which can not only prevent the slag from hindering the excavation progress, but also, the slag is backfilled into the coil, which can increase the structural strength of the coil and prevent the bottom surface from bulging or collapsing and causing damage to the coil. In addition, the opening size of the plurality of excavation holes 84 gradually increases from the inside to the outside along the radial direction of the drill disc 8, which can allow slag of different particle sizes to enter, thereby facilitating the transfer of slag.

In order to improve the excavation efficiency and prevent the drill disc 8 from wearing too quickly, in conjunction with FIG. 5 , the drill disc 8 includes a cylindrical base plate 86, on which the cutter block 81, the hob hole 82 and the excavation hole 84 are all arranged. A first lubrication hole 87 is provided on the outer peripheral side of the base plate 86, and a lubricating liquid storage tank 88 is formed on the inner bottom surface of the base plate 86. The outlet of the lubricating liquid storage tank 88 is connected to the first lubrication hole 87 through a pipeline, and a first rotary joint 89 is fixedly installed at the inlet of the lubricating liquid storage tank 88. It should be noted that the rotary joint is connected to an external lubricant supply device to protect the lubricant delivery pipe from being damaged by twisting. The lubricant sprayed from the nozzle of the first lubricating hole 87 can greatly reduce the friction of the rotary tube, thereby improving the excavation efficiency and extending the service life.

In conjunction with FIG6 , the slag rotary tube 3 is clamped with the first rotary tube 2. The first rotary tube 2 is provided with a first pipe connection groove 21 at the end of the slag rotary tube 3. One end of the slag rotary tube 3 protrudes outward toward the first pipe connection groove 21 to form a first pipe joint 31. The first pipe joint 31 and the first pipe connection groove 21 are both arranged in a dovetail shape. The dovetail shape design can limit the front-back and left-right freedom between the two rotary tubes. In addition, in order to limit the up-and-down freedom between the rotary tubes, the first pipe joint 31 is inserted into the first pipe connection groove 21. A clamping gap is left between one side of the first pipe joint 31 and the groove wall of the first pipe connection groove 21. A panel 9 is provided in the clamping gap. The panel 9 is provided with a spring latch 91 that can be retracted and moved at both ends of the panel 9 facing the first pipe connection groove 21 and the first pipe joint 31. A latch hole for inserting the spring latch 91 is provided on the end surface of the first pipe joint 31 facing the spring latch 91 and the bottom of the first pipe connection groove 21 facing the spring latch 91. It should be noted that the first spiral tube 2 and the slag rotary tube 3, the slag rotary tube 3 and the second spiral tube 4, and the second spiral tube 4 and the second spiral tube 4 can all be connected by the above-mentioned installation method of connecting with the panel 9. When in use, the first pipe joint 31 of the spiral tube is inserted into the first pipe connection groove 21 of another spiral tube, and then the accurate alignment is achieved. One side of the first pipe joint 31 is pressed against the second pipe connection groove 45, and a connection gap is formed at this time. Then the spring latches 91 at both ends of the panel 9 are pressed, and the panel 9 is inserted into the connection gap. After the panel 9 moves to the appropriate position, the spring latches 91 will pop out and insert into the latch hole to achieve the connection. It should be noted that the height and number of the first pipe joint 31 and the first pipe connection groove 21 are determined by calculation. If the resistance torque increases, the height and number of the joint bumps will increase, and even the pipe wall thickness has to be increased. The smooth and firm connection of the joint realizes the transmission of the main power, perfect pile hole wall protection, smooth passage through the cave and underground river, and the formation of a perfect construction space. For further precise positioning, the first pipe joint 31 forms a positioning block 22 , and the bottom of the first pipe joint groove 21 forms a positioning groove 32 . The positioning block 22 cooperates with the positioning groove 32 to further precisely position the two spiral pipes.

In this embodiment, in conjunction with FIG. 7 , the slag rotary tube 3 includes a tube body and an inner cylinder 33 mounted inside the tube body. It should be noted that the inner cylinder 33 is mounted inside the tube body through a plurality of steel beams 34 arranged at intervals, and a plurality of spiral blades 35 arranged at intervals are evenly distributed between the outer peripheral side surface of the inner cylinder 33 and the inner side surface of the tube body. It should be noted that the spiral blades 35 are all set in the same spiral direction. When the slag rotary tube 3 rotates forward, the spiral blades 35 can transfer the slag to the inside of the tube body. When the slag rotary tube 3 rotates reversely, the spiral blades 35 close the pipeline like a check valve to prevent the slag from retreating. This working principle is similar to that of a cement slurry mixer. The entire rotary tube system reciprocates back and forth until the slag in the rotary tube is drained, realizing a unique soil retreat function.

In actual application, in combination with FIG8 and FIG9, when the interior of the second coil 4 is filled with debris, the deadweight of the second coil 4 will increase significantly, resulting in a significant increase in the friction between the second coil 4 and its base. In order to mitigate the effect of the increased friction on excavation, the second coil 4 is provided with a lubrication joint mechanism 40, which includes a cylindrical sealing plate 41. The bottom surface of the sealing plate 41 is a sealing structure, which is mainly used to seal the debris inside the second coil 4. A second lubrication hole 42 is provided on the outer peripheral side of the sealing plate 41, and an inner tube 43 is formed inside the sealing plate 41. The outlet of the inner tube 43 is connected to the second lubrication hole 42 through a pipeline, and a second rotary joint 44 is fixedly installed at the inlet of the inner tube 43. By lubricating the outer wall of the second coil 4, the friction coefficient is reduced and the excavation efficiency is improved.

In conjunction with Fig. 10, Fig. 11 and Fig. 12, the third coil 5 is connected to the second coil 4, the second coil 4 is provided with a second pipe connection groove 45 at the end facing the third coil 5, the third coil 5 is provided with a pin plate hole 51 aligned with the second pipe connection groove 45, and the third coil 5 is fixedly installed with an electric pin plate mechanism, the electric pin plate mechanism includes a pin plate body 7 passing through the pin plate hole 51 and inserted into the second pipe connection groove 45. The electric pin plate mechanism also includes an electric push rod 71 fixedly installed on the third coil 5, both ends of the electric push rod 71 are provided with telescopic rods 72 that can be telescopically moved, and the ends of each telescopic rod 72 are fixedly connected with a wedge block 73, the pin plate body 7 protrudes toward the side of the wedge block 73 to form a mounting ear 74, the mounting ear 74 is provided with a wedge hole 75, the wedge hole 75 is provided with a first inclined surface 76, and the end of the wedge block 73 facing the wedge hole 75 is provided with a second inclined surface 77 opposite to the inclination direction of the first inclined surface 76. The third rotary tube 5 is also provided with a pin plate reset mechanism for driving the pin plate body 7 to move inward, and the pin plate reset mechanism includes a support frame 78 fixedly mounted on the third rotary tube 5, and the pin plate body 7 extends a guide column 79 toward the support frame, and a reset spring 70 is sleeved on the outer peripheral side of the guide column 79, one end of the reset spring 70 is fixedly connected to the guide column 79, and the other end of the reset spring 70 is fixedly connected to the support frame. When the electric pin plate mechanism is working, the two telescopic rods 72 of the electric push rod 71 extend outward, so that the wedge block 73 is inserted into the wedge hole 75, and under the guidance of the first inclined surface 76 and the second inclined surface 77, the telescopic rod 72 lifts the pin plate body 7, at this time, the return spring 70 is in a compressed state; then the second pipe connection groove 45 of the second coil 4 is aligned with the pin plate hole 51 of the third coil 5, the two telescopic rods 72 of the electric push rod 71 retract, and the compressed return spring 70 uses its own elastic force to drive the pin plate body 7 to insert into the second pipe connection groove 45 and the pin plate hole 51, thereby realizing the automatic docking of the second coil 4 and the third coil 5.

The first coil 2, the second coil 4, the slag rotary tube 3 and the third coil 5 of this embodiment are combined to form a coil system. The main driving force transmitted by the coil system includes the rotary cutting force and pressure of the cutter head, the horizontal tension and top pressure of the coil, which plays a perfect role in protecting the hole wall and can realize both pipe guiding and pipe jacking. The smooth connection of the coil makes it possible to cross caves and underground rivers: steel pipes or plastic pipes can be directly passed through by means of pipe guiding, and the inner space of the coil forms a perfect construction space, so that construction operations such as soil withdrawal and lubricant pumping can be carried out smoothly. At the same time, the slag will fill the inner space of the coil to avoid ground bulging or collapse.

In this embodiment, referring to FIG. 13 and FIG. 14 , the coil driving mechanism 6 includes an arc-shaped slide plate 61 fixedly mounted on both sides of the interior of the frame 1 , a driving gear shaft 62 and a driving coil 63 .

15 and 16 , a mounting portion 64 fixedly connected to the third coil 5 extends from the front end of the driving coil 63 , and a plurality of engaging teeth 65 arranged at intervals in a spiral shape with the top pipe direction as the axial direction are provided on the outer peripheral side of the driving coil 63 .

In conjunction with FIG17 , the inner side surface of each arc-shaped slide plate 61 is provided with a slide groove 66 which is spirally arranged with the jacking direction as the axial direction. The engaging teeth 65 are inserted into the slide groove 66, and the driving gear shaft 62 is fixedly installed on the frame 1 with the jacking direction as the axial direction, and the driving gear shaft 62 is meshed with the engaging teeth 65. During operation, the driving gear shaft 62 rotates, and the engaging teeth 65 of the driving coil 63 are meshed with the driving gear shaft 62, so that the driving coil 63 rotates. Under the spiral guidance of the engaging teeth 65 and the slide groove 66, the driving coil 63 can move in the excavation direction and rotate at the same time, which can not only provide the drill disc 8 with appropriate rotational excavation force, but also provide the drill disc 8 with a forward pushing pressure.

It should be noted that the coil drive mechanism 6 also includes a driving source for driving the active gear shaft to rotate. In the present embodiment, the driving source is a driving motor, which is connected to the active gear shaft 62 through a speed change mechanism. The driving motor and the speed change mechanism are directly used according to the calculation requirements to realize automatic slowing down when the resistance is large and automatic speeding up when the resistance is small. The driving coil 63 receives the speed change power of the active gear shaft 62, and cooperates with the spiral guide rail between the meshing teeth 65 and the slide groove 66 to realize forced pushing and pulling. The pushing and pulling speed of the driving coil 63 is only related to the rotation speed. At the same time, due to the amplification effect of the spiral component, a strong pushing and pulling force will be generated, realizing the invention purpose of core power conversion, forced controllable process, and reaction force transmission. The coil drive system converts the source power into rotary cutting and pressure of the coil system to realize forced advance and retreat.

In this embodiment, in order to better form a guiding and tight transmission relationship between the arc-shaped slide plate and the driving coil, the ratio of the length of the arc-shaped slide plate to the circumference of the driving coil is 4:1.

The working process of the pipe jacking machine of this embodiment is as follows: first, the third coil 5 is fixedly connected to the driving coil 63; second, the third coil 5 is moved forward to cover the slag screw-out pipe 3 and connect; third, the slag screw-out pipe 3 is connected to the first coil 2; fourth, the relevant lubrication system is connected; fifth, the driving source is started, the first coil 2, the slag screw-out pipe 3, the third coil 5 and the driving coil 63 rotate together, and the drill disc 8 at the end of the first coil 2 drills forward; sixth, when the excavation reaches the appropriate position, the driving source is stopped, and the third coil 5 is disconnected from the first coil 2. The second spiral tube 4 is connected between the slag rotary tube 3 and the third spiral tube 5, and the driving source is started again to dig. Seventh, repeating the fifth and sixth steps can continuously add spiral tube sections to make the spiral tube continuously advance forward, wherein a slag rotary tube 3 is added for every 10m of advance. Eighth, soil is withdrawn every 20-30m: according to the geological survey data, when it is determined that the geological stability of the drill bit position will not collapse, the entire spiral tube system reciprocates back and forth until the slag in the spiral tube is drained. The slag and mud are discharged to the soil collecting trough of the jacking pipe well and then discharged out of the well through the soil discharge system 11.

Another use of the pipe jacking machine of this embodiment is to guide pipes, that is, to bury pipes. For the pipe guiding operation, select pipes that can be dragged and laid, such as steel pipes, plastic pipes, cables, etc., remove the first coil 2 together with the drill plate 8 in the receiving well and disconnect the lubricating liquid pipe, then put in the pipe guiding head and connect the lubricating liquid pipe to the second coil 4, connect the other end of the pipe guiding head to the pipe to be buried, start the coil and drag the pipe to be buried into the hole, repeatedly connect the pipe in the receiving well, remove the coil in the pipe jacking machine well, and finally guide the pipe to be buried from the receiving well to the cavity.

Compared with the prior art, the rotary tube drive system of the present application converts the source power into rotary cutting and pressure of the rotary tube system to achieve forced push-pull. The push-pull speed of the driving rotary tube is only related to the rotation speed. At the same time, due to the amplification effect of the spiral component, a strong push-pull force will be generated, thereby achieving the invention purposes of core power conversion, forced controllable process, and reaction force transmission.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims (7)

1. A rotary tube driving system, characterized in that it comprises a frame, a plurality of rotary tubes connected in sequence along the excavation direction, and a rotary tube driving mechanism installed on the frame and used for driving the rotary tube body to rotate; The rotary tube driving mechanism includes an arc-shaped slide plate, a driving gear shaft and a driving rotary tube fixedly mounted on both sides of the frame, the arc-shaped slide plate is meshed with the driving rotary tube, and the driving gear shaft is meshed with the driving rotary tube; the rotary tube driving mechanism also includes a driving source for driving the driving gear shaft to rotate; The plurality of coils include a first coil at the beginning, a third coil at the end, and a second coil and a slag rotary tube between the first and third coils, a drill disc is fixedly installed in the beginning of the first coil, and the third coil is fixedly connected to the coil drive mechanism; A mounting portion fixedly connected to the third coil extends from the front end of the driving coil; The drill disc includes a plurality of cutting blocks fixedly mounted on the working surface of the drill disc, and the plurality of cutting blocks are arranged at intervals along the radial direction of the drill disc; the drill disc is also provided with a plurality of excavation holes arranged at intervals along the radial direction of the drill disc, and the opening sizes of the plurality of excavation holes gradually increase from the inside to the outside along the radial direction of the drill disc; the drill disc is provided with a plurality of hob holes arranged at intervals along the radial direction of the drill disc, and a hob mechanism is rotatably mounted in each hob hole; the drill disc includes a cylindrical base plate, and at least one first lubrication hole is formed on the outer peripheral side surface of the base plate, and a lubricating liquid containing tank is formed on the inner bottom surface of the base plate, and the outlet of the lubricating liquid containing tank is connected with the first lubrication hole through a pipeline, and the inlet of the lubricating liquid containing tank is fixedly mounted with a first rotating joint. 2. The coil drive system according to claim 1, wherein the drive source is a drive motor, and the drive motor is connected to the active gear shaft through a speed change mechanism. 3. The coil drive system according to claim 1 is characterized in that: the outer peripheral side surface of the driving coil is provided with a plurality of engaging teeth which are arranged in a spiral pattern with the axial direction of the top pipe as the axial direction, and the inner side surface of each arc-shaped slide plate is provided with a slide groove which is arranged in a spiral pattern with the axial direction of the top pipe as the axial direction, and the engaging teeth are inserted into the slide groove, and the active gear shaft is fixedly installed on the frame with the axial direction of the top pipe as the axial direction, and the active gear shaft is meshed with the engaging teeth. 4 . The coil driving system according to claim 1 , wherein the ratio of the length of the arc-shaped slide plate to the circumference of the driving coil is 4:1. 5. The rotary tube driving system according to claim 1 is characterized in that: the slag rotary tube is clamped with the first rotary tube, a first pipe connecting groove is opened at the end of the first rotary tube facing the slag rotary tube, one end of the slag rotary tube facing the first pipe connecting groove protrudes outward to form a first pipe joint, and the first pipe joint and the first pipe connecting groove are both arranged in a dovetail shape. 6. The rotary tube driving system according to claim 5 is characterized in that: the first pipe joint is inserted into the first pipe connection groove, and a clamping gap is left between one side of the first pipe joint and the groove wall of the first pipe connection groove, and an insert plate is arranged in the clamping gap, and retractable spring latches are installed at both ends of the insert plate facing the first pipe connection groove and the first pipe joint, and a clamping pin hole for inserting the spring latch is provided on the end surface of the first pipe joint facing the spring latch and the groove bottom of the first pipe connection groove facing the spring latch. 7. The rotary tube driving system according to claim 6 is characterized in that the soil rotary tube comprises a tube body and an inner cylinder mounted inside the tube body, and a plurality of spiral blades arranged at intervals are evenly distributed between the outer circumferential side surface of the inner cylinder and the inner side surface of the tube body.