Tunnel boring machine

Abstract

The present invention relates to a tunnel boring machine, the structure of which includes an adjustment frame, an automatic drill rod arranged on the adjustment frame, and an electric hammer arranged on the automatic drill rod. The automatic drill rod is moved or rotated in any direction by adjusting the adjustment frame; the automatic drill rod includes a height positioning rod connected to the adjustment frame, a spring compressor, a spring, and a sliding main pipe are sleeved on the height positioning rod in sequence, one end of the spring is connected to the spring compressor, and the other end of the spring is connected to the sliding main pipe. The spring compressor is located at one end of the height positioning rod connected to the adjustment frame, and a plurality of positioning holes are arranged on the upper surface of the height positioning rod along its axial direction, an upper limit switch is arranged on the sliding main pipe, and a lower limit switch is arranged on the spring compressor. The present invention reduces the labor intensity of operators, improves construction efficiency and accuracy, and will not be affected by the construction environment at the same time. It is easy to adjust, and has low requirements on operators, which is convenient for wide promotion.

Description

Technical Field

[0001] The invention relates to a drilling machine, in particular to a tunnel drilling machine. Background Art

[0002] During the construction process, it is necessary to drill holes on the inner wall of the tunnel to facilitate the installation of cables or optical cables. Traditional tunnel drilling construction generally uses manual drilling, where workers sit on a movable platform and use electric hammers to drill holes manually. This method not only has low drilling efficiency and unstable quality, but also makes workers prone to work fatigue and falls from heights. There are also a few projects that use intelligent drilling robots, but their use costs are high and are limited by the actual site environment. For example, uneven ground causes the robot body to deviate, and the robot parameters need to be adjusted in real time. The requirements for construction workers are high, and they cannot be widely promoted and used. Summary of the invention

[0003] The purpose of the present invention is to provide a tunnel boring machine to solve the problems of low efficiency and unstable quality of current manual boring and the limitation of intelligent boring that cannot be widely used.

[0004] The present invention is implemented as follows: a tunnel drilling machine comprises an adjustment frame, an automatic drill rod arranged on the adjustment frame, and an electric hammer arranged on the automatic drill rod, and the automatic drill rod is moved or rotated in any direction by adjusting the adjustment frame; the automatic drill rod comprises a height positioning rod connected to the adjustment frame, a spring compressor, a spring and a sliding main pipe are sequentially sleeved on the height positioning rod, one end of the spring is connected to the spring compressor, and the other end of the spring is connected to the sliding main pipe, and the spring compressor is located at one end of the height positioning rod connected to the adjustment frame A plurality of positioning holes are provided on the upper surface of the height positioning rod along its axial direction, an upper limit switch is provided on the sliding main pipe, and a lower limit switch is provided on the spring compressor. The upper limit switch and / or the lower limit switch are inserted into different positioning holes for positioning, a manual operating lever is provided on the spring compressor and the sliding main pipe, and the manual operating lever is toggled to compress or restore the spring, a connecting rod is inserted at the upper end of the sliding main pipe, the electric hammer is fixed at the end of the connecting rod, and an extension switch connected to the electric hammer switch is provided on the connecting rod or the sliding main pipe.

[0005] The upper limit switch has the same structure as the lower limit switch, including a frame, a rocker arm pin is provided in the frame, a rocker arm is axially connected to the rocker arm pin, a pin is provided on the inner side of the end of the rocker arm, a return spring is sleeved on the rocker arm pin, the return spring makes the rocker arm tend to swing inward, a handle is provided in the frame, the handle is connected to the rocker arm by a tension spring, the tension spring has the tendency to make the rocker arm swing outward, and by moving the handle to different positions, the tension spring generates different pulling forces on the rocker arm, when the force applied to the rocker arm by the tension spring is greater than the force applied to the rocker arm by the return spring, the limit switch is in the open state, and when the force applied to the rocker arm by the tension spring is less than the force applied to the rocker arm by the return spring, the limit switch is in the closed state.

[0006] The manual operating lever comprises a first operating arm and a second operating arm, wherein the end of the first operating arm is hinged to the spring tightener, one end of the second operating arm is hinged to the sliding main pipe, and the other end is hinged to the middle of the first operating arm.

[0007] A hole depth positioning rod is arranged at the end of the connecting rod, and the drilling depth is adjusted by adjusting the distance between the end of the hole depth positioning rod and the end of the electric hammer drill bit.

[0008] A dust absorption system is also provided, which comprises a dust cover arranged at the end of the electric hammer, a dust collector and a corrugated connecting pipe connecting the dust cover and the dust collector.

[0009] The adjusting frame includes a horizontal slide, a horizontal slide seat sleeved on the horizontal slide, a vertical rod arranged on the horizontal slide, a vertical slide seat sleeved on the vertical rod, a transverse slide seat arranged on the vertical slide, and a transverse slide seat arranged on the transverse slide. A vertical rack is arranged on the surface of the vertical rod along its axial direction. The vertical slide includes an upper and lower sliding sleeve sleeved on the vertical rod, a rotating sliding sleeve is sleeved on the upper and lower sliding sleeves, and an up and down moving gear is arranged on the upper and lower sliding sleeves. The up and down moving gear is meshed with the vertical rack. The rotating sleeve is provided with a horizontal corner flange, the transverse slide bar is fixed on the corner flange, a transverse rack is provided on the surface of the transverse slide bar along its axial direction, a transverse moving gear is provided on the transverse slide seat, the transverse moving gear is meshed with the transverse rack, an angle adjustment seat is provided on the transverse slide seat, an arc-shaped hole is provided on the angle adjustment seat, an angle positioning rod is hinged on the transverse slide seat, a positioning screw is passed through the angle positioning rod, and the positioning screw passes through the arc-shaped hole at the same time, and the angle positioning rod is used to insert the height positioning rod.

[0010] The transverse slide bar is fixed to the corner flange by bolts. The end surface of the corner flange is provided with an arc-shaped long hole, which allows the transverse slide bar to rotate around its axis by a maximum of 70°.

[0011] The arc hole is semicircular, allowing the automatic drill rod to rotate around its hinge axis by a maximum of 90°.

[0012] The horizontal slide is in the shape of a rectangular parallelepiped, the bottom surface of the horizontal slide is a plane, and the width of the horizontal slide is greater than its height. A hand wheel and a lead screw nut structure are arranged on the horizontal slide to adjust the position of the horizontal slide.

[0013] The present invention adjusts the position and angle of the electric hammer through the adjustment frame, so that the electric hammer can drill holes at the accurate position. The automatic drill rod stores force in the spring by toggling the operating arm, and the spring releases the elastic force to automatically move the electric hammer along the axial direction of the automatic drill rod. At the same time, the electric hammer is controlled to turn on by the extension switch to complete the automatic drilling. The present invention is used in conjunction with a movable working platform. When drilling holes, the position of the electric hammer is adjusted so that the electric hammer is at a very small distance from the inner wall of the tunnel. Then, the spring is manually charged to push the sliding main pipe where the electric hammer is located to move to complete the drilling operation. After drilling is completed, the electric hammer is returned. When changing the drilling position, the adjustment frame is adjusted to align the electric hammer with the next drilling position, and the above operation is repeated to complete the drilling.

[0014] The present invention also provides a dust collection system, which avoids the generation of dust at the construction site, reduces environmental pollution and the harm of dust to the health of workers.

[0015] The present invention reduces the labor intensity of operators, improves construction efficiency and accuracy, is not affected by the construction environment, is easy to adjust, has low requirements on operators, and is easy to be widely promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the automatic drill rod of the present invention.

[0018] Figure 3 , Figure 4 yes Figure 1 A partial enlarged view of .

[0019] Figure 5 It is a schematic diagram of the limit switch of the present invention in the closed state.

[0020] Figure 6 It is a schematic diagram of the limit switch of the present invention in the open state.

[0021] Figure 7 It is a schematic diagram of the dust cover of the present invention.

[0022] In the figure: 1. Automatic drill rod; 2. Electric hammer; 3. Horizontal slide; 4. Horizontal slide; 5. Vertical pole; 6. Vertical slide; 7. Horizontal slide; 8. Horizontal slide; 9. Angle adjustment seat; 10. Dust cover; 11. Dust collector; 12. Corrugated connecting pipe; 1-1. Height positioning rod; 1-2. Spring tightener; 1-3. Spring; 1-4. Sliding main pipe; 1-5. Positioning hole; 1-6. Upper limit switch; 1-7. Lower limit switch; 1-8. Manual joystick; 1-9. Connecting rod; 1-10. Extension switch; 1-11. Hole depth positioning rod; 1-6-1. Frame; 1-6-2, rocker arm pin; 1-6-3, rocker arm; 1-6-4, column pin; 1-6-5, return spring; 1-6-6, handle; 1-6-7, tension spring; 1-8-1, first operating arm; 1-8-2, second operating arm; 5-1, vertical rack; 6-1, upper and lower slide sleeves; 6-2, rotating slide sleeve; 6-3, upper and lower moving gears; 6-4, corner flange; 7-1, horizontal rack; 8-1, horizontal moving gear; 9-1, arc hole; 9-2, angle positioning rod; 9-3, positioning screw; 10-1, spacer; 10-2, dust outlet. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 As shown, the present invention includes an adjustment frame, an automatic drill rod 1 arranged on the adjustment frame, and an electric hammer 2 arranged on the automatic drill rod 1. The automatic drill rod 1 can be moved or rotated in any direction by adjusting the adjustment frame. The automatic drill rod 1 includes a height positioning rod 1-1 connected to the adjustment frame, and a spring 1-3 clamp 1-2, a spring 1-3, and a sliding main pipe 1-4 are sequentially sleeved on the height positioning rod 1-1. One end of the spring 1-3 is connected to the spring 1-3 clamp 1-2, and the other end of the spring 1-3 is connected to the sliding main pipe 1-4. The spring 1-3 clamp 1-2 is located at the end of the height positioning rod 1-1 connected to the adjustment frame. A plurality of positioning holes 1-5 are provided on the upper surface of the height positioning rod 1-1 along its axial direction, and an upper limit switch 1-4 is provided on the sliding main pipe 1-4. -6, a lower limit switch 1-7 is arranged on the spring 1-3 compressor 1-2, the upper limit switch 1-6 and / or the lower limit switch 1-7 are inserted into different positioning holes 1-5 for positioning, a manual operating lever 1-8 is arranged on the spring 1-3 compressor 1-2 and the sliding main pipe 1-4, the manual operating lever 1-8 is turned to compress or restore the spring 1-3, a connecting rod 1-9 is inserted at the upper end of the sliding main pipe 1-4, the electric hammer 2 is fixed at the end of the connecting rod 1-9, and an extension switch 1-10 connected to the switch of the electric hammer 2 is arranged on the connecting rod 1-9 or the sliding main pipe 1-4.

[0024] The manual operating lever 1-8 includes a first operating arm 1-8-1 and a second operating arm 1-8-2. The end of the first operating arm 1-8-1 is hinged to the spring 1-3 compressor 1-2. One end of the second operating arm 1-8-2 is hinged to the sliding main pipe 1-4, and the other end is hinged to the middle of the first operating arm 1-8-1.

[0025] A hole depth positioning rod 1-11 is provided at the end of the connecting rod 1-9, and the drilling depth is adjusted by adjusting the distance between the end of the hole depth positioning rod 1-11 and the end of the drill bit of the electric hammer 2.

[0026] like Figure 5 , Figure 6 As shown, the upper limit switch 1-6 has the same structure as the lower limit switch 1-7, and mainly comprises a frame 1-6-1, a rocker arm 1-6-3 pin shaft 1-6-2 is arranged in the frame 1-6-1, a rocker arm 1-6-3 is axially connected to the rocker arm 1-6-3 pin shaft 1-6-2, a column pin 1-6-4 is arranged on the inner side of the end of the rocker arm 1-6-3, and a return spring 1-6-5 is sleeved on the rocker arm 1-6-3 pin shaft 1-6-2. The return spring 1-6-5 makes the rocker arm 1-6-3 tend to swing inwards. A handle 1-6-6 is provided in the frame 1-6-1. The handle 1-6-6 is connected to the rocker arm 1-6-3 by a tension spring 1-6-7. The tension spring 1-6-7 makes the rocker arm 1-6-3 tend to swing outwards. By moving the handle 1-6-6 to different positions, the tension spring 1-6-7 produces different pulling forces on the rocker arm 1-6-3. The handle 1-6-6 is axially connected to the position of the pin 1-6-4 of the rocker arm 1-6-3 in the frame 1-6-1. When the handle 1-6-6 is pushed downward, since the angle between the limiting tension spring 1-6-7 of the frame 1-6-1 and the swinging direction of the rocker arm 1-6-3 is small, the component force along the swinging direction of the rocker arm 1-6-3 is large, and this component force is greater than the force applied to the rocker arm 1-6-3 by the return retaining spring 1-6-5, and the rocker arm 1-6-3 swings outward, so that the pin 1-6-4 on the rocker arm 1-6-3 will not be inserted into the positioning hole 1-5 on the height positioning rod 1-1, and the limit switch is open at this time. Start state; when the handle 1-6-6 is pushed upward, the upper end of the handle 1-6-6 rests on the frame 1-6-1, and the angle between the tension spring 1-6-7 and the swinging direction of the rocker arm 1-6-3 is relatively large, which is an obtuse angle. The component force of the tension spring 1-6-7 along the swinging direction of the rocker arm 1-6-3 is relatively small, and the component force is smaller than the force applied to the rocker arm 1-6-3 by the return spring 1-6-5, so that the rocker arm 1-6-3 swings inward, so that when the pin 1-6-4 encounters the positioning hole 1-5 on the height positioning rod 1-1, the pin 1-6-4 will be inserted into the positioning hole 1-5, and the limit switch is in the closed state.

[0027] When drilling, first close the upper limit switch 1-6 and open the lower limit switch 1-7, turn the manual joystick 1-8 to compress the spring 1-3, then close the lower limit switch 1-7, and turn on the electric hammer 2 and the upper limit switch 1-6 after the electric hammer 2 is aligned with the drilling position. Under the elastic force of the spring 1-3, the electric hammer 2 automatically moves forward to drill. During this process, the operator only needs to monitor whether the electric hammer 2 is offset or has other faults. For example, when encountering a gap in reinforced concrete, the device will shake violently. At this time, the manual joystick 1-8 can be pulled down to quickly withdraw the drill bit and then reposition it.

[0028] When retracting the drill pipe, first close the upper limit switch 1-6, open the lower limit switch 1-7, move the manual joystick 1-8, and the manual joystick 1-8 will automatically retract under the action of the spring 1-3, then open the upper limit switch 1-6, lift the sliding main pipe 1-41~2mm and then release it to ensure that the pin 1-6-4 exits the positioning hole 1-5, the spring 1-3, the tightener 1-2, the spring 1-3, the sliding main pipe 1-4 and the connecting rod 1-9 will automatically drop to the original position. When drilling a lateral hole, this step requires holding the sliding main pipe 1-4 and forcing it back to its original position.

[0029] like Figure 1 , Figure 7 As shown, a dust absorption system is also provided, and the dust absorption system includes a dust cover 10, a dust collector 11, and a corrugated connecting pipe 12 connecting the dust cover 10 and the dust collector 11, which are arranged at the end of the electric hammer 2. The dust cover 10 is used to be plugged into the end of the electric hammer 2 to cover the drill bit. The dust cover 10 is a corrugated pipe with openings at both ends. A dust outlet 10-2 is provided on the side wall of the dust cover 10. One end of the corrugated connecting pipe 12 is plugged into the dust outlet 10-2. A spacer 10-1 with a protruding port is provided at the suspended end port of the dust cover 10, which is used to leave a gap between the port of the dust cover 10 and the drilling construction surface. There are four spacers 10-1 in total, and the four spacers 10-1 are evenly distributed around the axis of the dust cover 10. The spacer 10-1 is a sheet structure bent toward the inside of the dust cover 10. The dust outlet 10 - 2 is a connection port protruding from the side wall of the dust cover 10 , and the dust outlet 10 - 2 is arranged at an end away from the spacer 10 - 1 . In the initial state of the dust cover 10 , the end of the drill bit is located inside the dust cover 10 .

[0030] When in use, install the dust cover 10 on the end of the electric hammer 2 to cover the drill bit, and then use the corrugated connecting pipe 12 to connect the dust cover 10 to the vacuum cleaner 11. Turn on the vacuum cleaner 11 and adjust it to a suitable power before starting to drill holes. During the drilling process, the end of the dust cover 10 first contacts the construction surface. As the electric hammer 2 moves forward, the dust cover 10 begins to be compressed and shortened, and the drill bit begins to contact the construction surface to drill holes. The dust generated by drilling is carried away by the airflow generated by the vacuum cleaner 11 and finally collected by the vacuum cleaner 11. Since the end of the dust cover 10 is provided with a spacer 10-1, the spacer 10-1 can ensure that there is a gap between the end of the vacuum cleaner 11 and the construction surface for gas to enter, so that a smooth airflow can be generated to ensure that the generated dust can be efficiently carried away by the airflow.

[0031] like Figure 1 , Figure 2 as well as Figure 3 As shown, the adjustment frame includes a horizontal slide 3, a horizontal slide 4 sleeved on the horizontal slide 3, a vertical rod 5 arranged on the horizontal slide 4, a vertical slide 6 sleeved on the vertical rod 5, a transverse slide 7 arranged on the vertical slide 6, and a transverse slide 8 arranged on the transverse slide 7.

[0032] A vertical rack 5-1 is provided on the surface of the vertical pole 5 along its axial direction. The vertical slide 6 includes an upper and lower sliding sleeve 6-1 sleeved on the vertical pole 5. A rotating sleeve 6-2 is sleeved on the upper and lower sliding sleeve 6-1. The rotating sleeve 6-2 can rotate around the upper and lower sliding sleeve 6-1. An upper and lower moving gear 6-3 is provided on the upper and lower sliding sleeve 6-1. The upper and lower moving gear 6-3 is meshed with the vertical rack 5-1. The vertical slide 6 is moved up and down by rotating the upper and lower moving gear 6-3. A horizontal corner flange 6-4 is provided on the rotating sleeve 6-2. The transverse slide bar 7 is fixed on the corner flange 6-4. The transverse slide bar 7 is fixed on the corner flange 6-4 by bolts. The end face of the corner flange 6-4 is provided with an arc-shaped long hole, allowing the transverse slide bar 7 to rotate around its axis by a maximum of 70°.

[0033] A transverse rack 7-1 is provided on the surface of the transverse slide bar 7 along its axial direction, and a transverse moving gear 8-1 is provided on the transverse slide seat 8. The transverse moving gear 8-1 meshes with the transverse rack 7-1. The horizontal position of the transverse slide seat 8 is adjusted by rotating the transverse moving gear 8-1. An angle adjustment seat 9 is provided on the transverse slide seat 8. An arc hole 9-1 is provided on the angle adjustment seat 9. An angle positioning rod 9-2 is hinged on the transverse slide seat 8. A positioning screw 9-3 is passed through the angle positioning rod 9-2. The positioning screw 9-3 passes through the arc hole 9-1 at the same time. The angle positioning rod 9-2 is used to insert the height positioning rod 1-1. The arc hole 9-1 is semicircular, allowing the automatic drill rod 1 to rotate up to 90° around its hinge axis.

[0034] The horizontal slide 3 is in the shape of a cuboid, the bottom surface of the horizontal slide 3 is a plane, and the width of the horizontal slide 3 is greater than its height. A handwheel and a lead screw nut structure are provided on the horizontal slide 3 for adjusting the position of the horizontal slide 4.

[0035] The present invention adjusts the position and angle of the electric hammer 2 through the adjustment frame, so that the electric hammer 2 can drill holes at the accurate position. The automatic drill rod 1 stores power in the spring 1-3 by toggling the operating arm, and the spring 1-3 releases the elastic force to automatically move the electric hammer 2 along the axial direction of the automatic drill rod 1. At the same time, the electric hammer 2 is controlled to be turned on by the extension switch 1-10 to complete the automatic drilling. The present invention is used in conjunction with a movable working platform. The present invention is placed on the platform. When drilling holes, the position of the electric hammer 2 is first adjusted so that the electric hammer 2 is at a very small distance from the inner wall of the tunnel. Then, the spring 1-3 is manually charged to push the sliding main pipe 1-4 where the electric hammer 2 is located to move to complete the drilling operation. After drilling is completed, the electric hammer 2 is returned. When changing the drilling position, the adjustment frame is adjusted to align the electric hammer 2 with the next drilling position, and the above operation is repeated to complete the drilling.

[0036] The present invention also provides a dust collection system to avoid the generation of dust at the construction site, reduce environmental pollution and the harm of dust to workers' health. The present invention reduces the labor intensity of operators, improves construction efficiency and accuracy, and is not affected by the construction environment. It is easy to adjust, transport and assemble, and has low requirements for operators, which is convenient for wide promotion.

Claims

1. A tunnel boring machine, characterized in that: It includes an adjustment frame, an automatic drill rod arranged on the adjustment frame, and an electric hammer arranged on the automatic drill rod, and the automatic drill rod is moved or rotated in any direction by adjusting the adjustment frame; the automatic drill rod includes a height positioning rod connected to the adjustment frame, and a spring compressor, a spring and a sliding main pipe are sequentially sleeved on the height positioning rod, one end of the spring is connected to the spring compressor, and the other end of the spring is connected to the sliding main pipe, the spring compressor is located at one end of the height positioning rod connected to the adjustment frame, and a plurality of positioning holes are provided on the upper surface of the height positioning rod along its axial direction, an upper limit switch is provided on the sliding main pipe, and a lower limit switch is provided on the spring compressor, and the upper limit switch and or the lower limit switch are inserted into different positioning holes for positioning, and a manual joystick is provided on the spring compressor and the sliding main pipe, and the manual joystick is toggled to compress or restore the spring, and a connecting rod is inserted at the upper end of the sliding main pipe, and the electric hammer is fixed to the end of the connecting rod, and an extension switch connected to the electric hammer switch is provided on the connecting rod or the sliding main pipe; The adjusting frame includes a horizontal slide, a horizontal slide seat sleeved on the horizontal slide, a vertical rod arranged on the horizontal slide, a vertical slide seat sleeved on the vertical rod, a transverse slide seat arranged on the vertical slide, and a transverse slide seat arranged on the transverse slide. A vertical rack is arranged on the surface of the vertical rod along its axial direction. The vertical slide includes an upper and lower sliding sleeve sleeved on the vertical rod, a rotating sliding sleeve is sleeved on the upper and lower sliding sleeves, and an up and down moving gear is arranged on the upper and lower sliding sleeves. The up and down moving gear is meshed with the vertical rack. The rotating sleeve is provided with a horizontal corner flange, the transverse slide bar is fixed on the corner flange, a transverse rack is provided on the surface of the transverse slide bar along its axial direction, a transverse moving gear is provided on the transverse slide seat, the transverse moving gear is meshed with the transverse rack, an angle adjustment seat is provided on the transverse slide seat, an arc-shaped hole is provided on the angle adjustment seat, an angle positioning rod is hinged on the transverse slide seat, a positioning screw is passed through the angle positioning rod, the positioning screw passes through the arc-shaped hole at the same time, and the angle positioning rod is used to plug the height positioning rod; The upper limit switch has the same structure as the lower limit switch, including a frame, a rocker arm pin is arranged in the frame, a rocker arm is axially connected to the rocker arm pin, a column pin is arranged on the inner side of the end of the rocker arm, a return clamp spring is sleeved on the rocker arm pin, the return clamp spring makes the rocker arm have a tendency to swing inwards, a handle is arranged in the frame, the handle is connected to the rocker arm by a tension spring, the tension spring has a tendency to make the rocker arm swing outwards, and by turning the handle to different positions, the tension spring generates different pulling forces on the rocker arm, when the force applied by the tension spring to the rocker arm is greater than the force applied by the return clamp spring to the rocker arm, the limit switch is in an open state, and when the force applied by the tension spring to the rocker arm is less than the force applied by the return clamp spring to the rocker arm, the limit switch is in a closed state; A hole depth positioning rod is provided at the end of the connecting rod, and the drilling depth is adjusted by adjusting the distance between the end of the hole depth positioning rod and the end of the electric hammer drill bit; A dust absorption system is also provided, which includes a dust cover arranged at the end of the electric hammer, a dust collector and a corrugated connecting pipe connecting the dust cover and the dust collector; the dust cover is used to be plugged into the end of the electric hammer to cover the drill bit, the dust cover is a corrugated pipe with openings at both ends, a dust outlet is provided on the side wall of the dust cover, one end of the corrugated connecting pipe is plugged into the dust outlet, and a spacer with a protruding port is provided at the suspended end port of the dust cover, which is used to leave a gap between the port of the dust cover and the drilling construction surface.

2. The tunnel boring machine according to claim 1, characterized in that: The manual operating lever comprises a first operating arm and a second operating arm, wherein the end of the first operating arm is hinged to the spring tightener, one end of the second operating arm is hinged to the sliding main pipe, and the other end is hinged to the middle of the first operating arm.

3. The tunnel boring machine according to claim 1, characterized in that: The transverse slide bar is fixed to the corner flange by bolts. The end surface of the corner flange is provided with an arc-shaped long hole, which allows the transverse slide bar to rotate around its axis by a maximum of 70°.

4. The tunnel boring machine according to claim 1, characterized in that: The arc hole is semicircular, allowing the automatic drill rod to rotate around its hinge axis by a maximum of 90°.

5. The tunnel boring machine according to claim 1, characterized in that: The horizontal slide is in the shape of a rectangular parallelepiped, the bottom surface of the horizontal slide is a plane, and the width of the horizontal slide is greater than its height. A hand wheel and a lead screw nut structure are arranged on the horizontal slide to adjust the position of the horizontal slide.

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