Drill pipe pullback shaft sinking machine

Abstract

The present application discloses a drill pipe tension type shaft sinking machine, which comprises a tension drill pipe, an extension stepping mechanism and a rock breaking mechanism, the tension drill pipe is fixedly arranged in the guide well, the rock breaking mechanism and the extension stepping mechanism are fixedly connected, a tension ring is arranged on the surface of the tension drill pipe, the extension stepping mechanism is detachably connected with the tension ring, and the rock breaking mechanism moves along the axial direction of the tension drill pipe through the extension stepping mechanism. The tension drill pipe penetrates the shaft sinking machine, the extension stepping mechanism is detachably connected with the tension drill pipe to provide axial support force, the machine body does not need to bear and resist the strong pressure of the support shoe plate, the structure is simplified, and the self weight is reduced; the tension drill pipe passes through the center of the shaft sinking machine, the tension drill pipe plays a guiding and limiting role, the shaft sinking machine can be coaxial with the wellbore at all times and cannot be deflected, the drilling track is optimized, and leveling and centering work is not needed, and meanwhile, stable and efficient sinking can be maintained.

Description

Technical Field

[0001] This invention relates to the field of shaft tunneling technology. Specifically, it relates to a drill pipe pulling type shaft tunneling machine. Background Technology

[0002] Current shaft boring machines (TBMs) utilize two layers of horizontal support plates around the machine body. These plates extend and press against the shaft wall to support the TBM's weight, provide reaction force for the drilling thrust, and balance the reverse torque of the drill bit breaking through rock. This support method relies on the effective friction generated by the strong contact between the support plates and the shaft wall. However, when encountering weak, collapsible, or cavitary rock formations, the support force is significantly reduced, leading to imbalances in the TBM, decreased drilling thrust, and an inability to balance the reverse torque. This affects the normal operation of the TBM and can even cause support failure, resulting in serious accidents such as the TBM slipping. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a drill pipe pulling type vertical shaft tunneling machine that is not limited by the strength of the shaft wall and can always remain stable; it can maintain a stable and efficient tunneling thrust during the tunneling process and automatically maintain the tunneling direction to achieve stable and efficient tunneling.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a drill pipe pulling type vertical shaft tunneling machine, including a pulling drill pipe, a telescopic stepping mechanism, and a rock breaking mechanism. The pulling drill pipe passes through and is fixedly installed in the pilot shaft; the rock breaking mechanism and the telescopic stepping mechanism are fixedly connected; a bearing ring is formed on the surface of the pulling drill pipe; the telescopic stepping mechanism is detachably connected to the bearing ring; and the rock breaking mechanism moves along the axial direction of the pulling drill pipe through the telescopic stepping mechanism. Using the pulling drill pipe as a fixed foundation provides stable and effective axial support for the rock breaking mechanism. The gravity and tunneling reaction force of the rock breaking mechanism, along with the equal axial force, can act entirely on the formation. Compared to the traditional method of relying entirely on support shoes to tighten the shaft wall, the support strength is significantly improved and is unaffected by the formation.

[0005] The aforementioned pull-type vertical shaft boring machine includes a rock-breaking mechanism comprising, from top to bottom, an axial telescopic component, a rotary power component, and a drill bit. The rotary power component is fixed to the bottom of the axial telescopic component and outputs rotational power. The drill bit is driven and connected to the power output end at the bottom of the rotary power component. A telescopic stepping mechanism is fixedly installed inside the axial telescopic component. The pull-type drill rod passes sequentially through the axial telescopic component, the telescopic stepping mechanism, the rotary power component, and the drill bit. The telescopic stepping mechanism drives the rotary power component and the drill bit to move axially along the pull-type drill rod via the axial telescopic component. Traditional shoe-plate support methods require the support shoe plates to provide enormous pressure to tighten the well wall, and the tunneling machine body bears a very large reaction force. This typically involves reinforced support structures, leading to a significant increase in weight and requiring additional power for hoisting and tunneling. In contrast, this invention uses a tension drill rod that penetrates the tunneling machine. A telescopic stepping mechanism detachably connects the tension drill rod to provide axial support. The machine body does not need to withstand the immense pressure from the support shoe plates, simplifying the structure and reducing weight. The tension drill rod passes through the center of the tunneling machine, acting as a guide and constraint, ensuring the tunneling machine remains coaxial with the wellbore and does not deviate. This optimizes the drilling trajectory and eliminates the need for leveling and centering work.

[0006] The aforementioned drill pipe pulling type vertical shaft boring machine includes a telescopic stepping mechanism comprising an upper locking component, a lower locking component, and a stepping cylinder. The upper and lower locking components are connected via the stepping cylinder, and both are detachably connected to the tension ring. The stepping cylinder moves the upper and lower locking components closer together or further apart. Utilizing the upper and lower locking components and the stepping cylinder, the boring machine can move upwards or downwards, providing a thrust exceeding its own weight during tunneling to maintain optimal tunneling efficiency.

[0007] The aforementioned drill pipe pulling type vertical shaft boring machine includes an axial telescopic component comprising an outer cylinder, an inner cylinder, and an axial slide rail. The inner cylinder is axially slidably fitted within the outer cylinder via the axial slide rail. An upper locking component is fixed to the outer cylinder, and a lower locking component passes through the inner cylinder and connects to the rotary power component. The axial telescopic component not only stabilizes axial extension and retraction but also transmits drilling counter-torque, resists vibration and imbalance during drill bit excavation, and protects the stepping cylinder.

[0008] In the aforementioned drill pipe pulling type vertical shaft tunneling machine, the base of the rotary power unit is fixedly connected to the bottom of the inner cylinder. A support cylinder is integrally formed inside the base from the end connected to the inner cylinder toward the drill bit. The motor assembly of the rotary power unit is arranged in the base space above the bottom of the support cylinder. The lower locking component is fixed inside the support cylinder. By adding a support cylinder, the length of the stepping cylinder is increased, resulting in a greater single-stroke distance. Conventional tunneling machines use one or more support shoe plates to frictionally support the tunneling thrust against the well wall, providing limited support and thus restricting the tunneling thrust. However, by designing a tension drill rod to provide axial support, all force is applied to the ground surface, improving the support effect and allowing for greater tunneling thrust. In conventional tunneling machines, the pressure of the stepping cylinder acts directly on the rotating power component, pushing it forward axially. The relatively low pressure is sufficient for this condition. The stepping cylinder, however, is the power source for tunneling thrust. One end of the stepping cylinder is mounted below the motor assembly providing the rotating power. During tunneling, the motor assembly and the stepping cylinder operate simultaneously. The stepping cylinder's point of force is located in front of the motor assembly, effectively pulling the motor assembly forward rather than pushing it. This real-time guidance of the rotating power component prevents skewness, tilting, and wear under high thrust conditions, thus ensuring tunneling accuracy.

[0009] The aforementioned drill pipe tension shaft boring machine has a support frame fixedly installed on the top of the axial telescopic component. Horizontal hydraulic support shoes are fixedly installed on the support frame at equal intervals along the circumferential direction. The free ends of the horizontal hydraulic support shoes are braced against the well wall. The counter-torque generated by the drill bit breaking rock is transmitted to the horizontal hydraulic support shoes through the axial telescopic component and acts on the well wall to achieve counter-torque balance. Hydraulic support shoes are used to balance the counter-torque generated during tunneling and provide some auxiliary support. During tunneling, the upper locking component is connected to the tension drill rod, while the lateral hydraulic support shoe is located adjacent to the upper locking component. There is a relatively free section of the machine body between the drill bit, the lateral hydraulic support shoe, and the upper locking component. During the drill bit's tunneling process, when encountering local hard rock or other abnormal vibrations, this section of the machine body can absorb the abnormal vibrations, maintain a relatively stable state, and reduce the vibrations transmitted to the upper locking component, thus maintaining the radial stability of the tension drill rod. If the lateral hydraulic support shoe is installed at any position far from the upper locking component, although it can still achieve the same stabilization and support effect, when abnormal vibrations occur at the drill bit position, after the force is transmitted to the hydraulic support shoe, the entire machine body swings around the fixed hydraulic support shoe as the center point, making it difficult for the upper locking component and the tension drill rod to maintain a stable state.

[0010] In the aforementioned drill pipe pulling type vertical shaft boring machine, the upper locking component and the lower locking component have the same structure. The upper locking component includes a base plate, a clamping cylinder, a locking plate, and a top plate. The base plate and the top plate are provided with corresponding through holes. Two parallel steel plates are welded to the base plate and the top plate on both sides of the through holes, forming a sliding groove between the two steel plates. The locking plate slides in the sliding groove. The clamping cylinder is installed between the two steel plates, and the piston rod end of the clamping cylinder is connected to the locking plate. The pulling drill pipe passes through the through hole. The clamping cylinder drives the locking plate to engage with or disengage from the tension ring to form a detachable connection.

[0011] In the aforementioned drill rod tension-type vertical shaft tunneling machine, the upper end of the tension drill rod passes through the guide shaft and is fixedly connected to the riser drill fixed on the ground, while the lower end of the tension drill rod passes through the guide shaft and enters the lower horizontal roadway, where it is fixedly connected to the roadway foundation.

[0012] The aforementioned drill pipe tension-type vertical shaft tunneling machine includes a roadway foundation comprising a bottom beam, a threaded locking cap, an outer cylinder, spokes, and an inner ring. The bottom beam is horizontally mounted on the top plate of the lower horizontal roadway. The lower end of the tension drill pipe passes through the bottom beam and is fixedly connected to the bottom beam via the threaded locking cap. The outer cylinder is coaxially mounted inside the guide shaft and fits against the shaft wall. The inner ring is coaxially mounted inside the outer cylinder and is fitted onto the tension drill pipe. The inner ring and the outer cylinder are fixedly connected by spokes.

[0013] The aforementioned drill pipe tension shaft boring machine also includes a lifting platform system. The lifting platform system is detachably connected to the bearing ring on the surface of the tension drill pipe via another telescopic stepping mechanism. The lifting platform system moves along the axial direction of the tension drill pipe via the telescopic stepping mechanism. The lifting platform system includes multiple interconnected lifting platforms, and the telescopic stepping mechanism is fixed together with the uppermost lifting platform.

[0014] The technical solution of the present invention achieves the following beneficial technical effects:

[0015] This invention uses a tension drill rod that penetrates the tunneling machine. A telescopic stepping mechanism, detachably connected to the tension drill rod, provides axial support. The machine body does not need to bear or resist the strong pressure from the support shoe plate, simplifying the structure and reducing its weight. The tension drill rod passes through the center of the tunneling machine, acting as a guide and constraint, ensuring the tunneling machine remains coaxial with the shaft and does not deviate. This optimizes the drilling trajectory, eliminating the need for leveling and centering work, while maintaining stable and efficient tunneling. Attached Figure Description

[0016] Figure 1 A schematic diagram of the drill pipe tension type vertical shaft boring machine of the present invention performing vertical shaft boring;

[0017] Figure 2 A partial three-dimensional structural schematic diagram of the rock-breaking mechanism of this invention;

[0018] Figure 3 A partial cross-sectional structural schematic diagram of the rock-breaking mechanism of this invention;

[0019] Figure 4 A cross-sectional structural schematic diagram of the telescopic stepping mechanism of the present invention;

[0020] Figure 5 A top view cross-sectional structural diagram of the upper locking component of this invention;

[0021] Figure 6 A schematic cross-sectional view of the tunnel foundation of this invention;

[0022] Figure 7 A top view of the tunnel foundation of this invention;

[0023] Figure 8 A schematic diagram of the lifting platform system of the present invention, which is coupled to the tension drill rod via a telescopic stepping mechanism;

[0024] Figure 9 A schematic diagram of the retracted state of the telescopic stepping mechanism of the drill pipe tension type vertical shaft tunneling machine of the present invention;

[0025] Figure 10 A schematic diagram of the extended stepping mechanism of the drill pipe tension type vertical shaft tunneling machine of the present invention in the extended state.

[0026] The reference numerals in the diagram are as follows: 1-Pull drill pipe; 2-Telescopic stepping mechanism; 21-Upper locking component; 22-Lower locking component; 23-Stepping cylinder; 24-Base plate; 25-Clamping cylinder; 26-Clamping insert plate; 27-Top plate; 28-Steel plate; 3-Rock breaking mechanism; 31-Axial telescopic component; 311-Outer cylinder; 312-Inner cylinder; 313-Axial slide rail; 32-Rotary power component; 321-Base; 322-Motor assembly; 323-Support cylinder; 324-Output cylinder; 33-Drill bit; 4-Guide shaft; 5-Raising drilling rig; 6-Tunnel foundation; 601-Bottom beam; 602-Threaded locking cap; 603-Outer cylinder; 604-Spoke; 605-Inner ring; 7-Lower horizontal tunnel; 8-Support frame; 9-Transverse hydraulic support shoe; 10-Tension ring; 11-Lifting plate system. Detailed Implementation

[0027] The drill pipe pulling type vertical shaft boring machine in this embodiment, such as Figure 1As shown, the system includes a pull drill pipe 1, a telescopic stepping mechanism 2, and a rock-breaking mechanism 3. The pull drill pipe 1 is installed through and fixedly installed in the pilot well 4. The two ends of the pull drill pipe 1 are fixed to the two ends of the pilot well 4, respectively. The rock-breaking mechanism 3 and the telescopic stepping mechanism 2 are fixedly connected. The pull drill pipe 1 is an existing raise drill pipe. A bearing ring 10 is opened on the surface of the pull drill pipe 1 near the chuck assembly. It can be used after simple modification. The telescopic stepping mechanism 2 is detachably connected to the bearing ring 10. The rock-breaking mechanism 3 moves along the axial direction of the pull drill pipe 1 through the telescopic stepping mechanism 2.

[0028] like Figure 1 As shown, the ground end of the pull drill rod 1 is constructed by the raise drill rig 5 using conventional raise drilling methods to form a pilot shaft 4. After the starting shaft is constructed on the ground, the assembled shaft tunneling machine and hoisting system 11 are hoisted in. Then, the pull drill rod 1 passes through the hoisting system 11 and the shaft tunneling machine in sequence and enters the lower horizontal roadway 7 along the pilot shaft 4, where it is fixedly connected to the roadway foundation 6. After the connection is completed, the pull drill rod 1 is tightened by the raise drill rig 5.

[0029] like Figure 6-7 As shown, the tunnel foundation 6 includes a bottom beam 601, a threaded locking cap 602, an outer cylinder 603, spokes 604, and an inner ring 605. The bottom beam 601 is horizontally mounted on the top plate of the lower horizontal tunnel 7. The lower end of the pull drill rod 1 passes through the bottom beam 601 and is fixedly connected to the bottom beam 601 through the threaded locking cap 602. The outer cylinder 603 is coaxially mounted inside the guide shaft 4 and fits against the shaft wall. The inner ring 605 is coaxially mounted inside the outer cylinder 603 and is fitted onto the pull drill rod 1. The inner ring 605 and the outer cylinder 603 are fixedly connected by spokes 604.

[0030] like Figure 2-3 As shown, the rock-breaking mechanism 3 includes an axial telescopic component 31, a rotary power component 32, and a drill bit 33 arranged sequentially from top to bottom. The rotary power component 32 is fixed to the bottom of the axial telescopic component 31 and outputs rotary power. The drill bit 33 is driven and connected to the power output end at the bottom of the rotary power component 32. The telescopic stepping mechanism 2 is fixedly installed inside the axial telescopic component 31. The tension drill rod 1 passes through the middle of the axial telescopic component 31, the telescopic stepping mechanism 2, the rotary power component 32, and the drill bit 33 in sequence. The telescopic stepping mechanism 2 drives the rotary power component 32 and the drill bit 33 to move along the axial direction of the tension drill rod 1 through the axial telescopic component 31.

[0031] like Figure 3 As shown, the axial telescopic component 31 includes an outer cylinder 311, an inner cylinder 312, and an axial slide rail 313. The inner cylinder 312 is axially slidably fitted inside the outer cylinder 311 via the axial slide rail 313.

[0032] like Figure 3As shown, the upper locking component 21 is fixed to the outer cylinder 311, and the lower locking component 22 passes through the inner cylinder 312 and is connected to the rotary power component 32. The base 321 of the rotary power component 32 is fixedly connected to the bottom of the inner cylinder 312. A support cylinder 323 is integrally formed inside the base 321 from the end connected to the inner cylinder 312 toward the drill bit 33. The motor assembly 322 of the rotary power component 32 is arranged in the space of the base 321 above the bottom of the support cylinder 323. The lower locking component 22 is fixed inside the support cylinder 323. The rotary power component 32 is prior art. Figure 3 As shown, a brief description is as follows: the output cylinder 324 is coaxially and rotatably mounted in the machine base 321. A gear ring is coaxially mounted in the output cylinder 324. The motor assembly 322 is a hydraulic motor, which is mounted in the machine base 321. A gear is mounted on its output shaft, which meshes with the gear ring to achieve transmission, thereby driving the output cylinder 324 and the drill bit 33 to rotate.

[0033] like Figure 4 , Figure 9 and Figure 10 As shown, the telescopic stepping mechanism 2 includes an upper locking component 21, a lower locking component 22, and a stepping cylinder 23. The upper locking component 21 and the lower locking component 22 are connected by the stepping cylinder 23. Both the upper locking component 21 and the lower locking component 22 are detachably connected to the tension ring 10. The stepping cylinder 23 drives the upper locking component 21 and the lower locking component 22 to move closer to each other or further away from each other.

[0034] like Figure 4-5 As shown, the upper locking component 21 and the lower locking component 22 have the same structure. The upper locking component 21 includes a base plate 24, a clamping cylinder 25, a locking insert plate 26, and a top plate 27. The base plate 24 and the top plate 27 are provided with corresponding through holes. Two parallel steel plates 28 are welded to the base plate 24 and the top plate 27 on both sides of the through holes. A sliding groove is formed between the two steel plates 28. The locking insert plate 26 is slidably fitted in the sliding groove. The clamping cylinder 25 is installed between the two steel plates 28, and the piston rod end of the clamping cylinder 25 is connected to the locking insert plate 26. The tension drill rod 1 passes through the through hole. The clamping cylinder 25 drives the locking insert plate 26 to engage with or disengage from the tension ring 10 to form a detachable connection.

[0035] like Figure 2-3 As shown, a support frame 8 is fixedly installed on the top of the axial telescopic component 31. Lateral hydraulic support shoes 9 are fixedly installed at equal intervals along the circumferential direction on the support frame 8. The free ends of the lateral hydraulic support shoes 9 are braced against the well wall. The counter-torque generated by the drill bit 33 breaking rock is transmitted to the lateral hydraulic support shoes 9 through the axial telescopic component 31 and acts on the well wall to achieve counter-torque balance. The lateral hydraulic support shoes 9 are existing technology, mainly using a hydraulic cylinder to push the telescopic joint to extend, causing the shoe plate at the end of the telescopic joint to press against the well wall. The specific structural principle will not be described further.

[0036] like Figure 1 and Figure 8 As shown, the lifting platform system 11 is detachably connected to the bearing ring 10 on the surface of the tension drill rod 1 via another telescopic stepping mechanism 2. The lifting platform system 11 moves along the axial direction of the tension drill rod 1 via the telescopic stepping mechanism 2. The lifting platform system 11 includes multiple interconnected lifting platforms, and the telescopic stepping mechanism 2 is fixed to the uppermost lifting platform. Since the fixing point is located at the top of the lifting platform system, the lifting platform system can be automatically stabilized by using its own weight to press down.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A drill pipe tension type vertical shaft boring machine, characterized in that, The system includes a tension drill rod (1), a telescopic stepping mechanism (2), and a rock-breaking mechanism (3). The tension drill rod (1) passes through and is fixedly installed inside the pilot well (4). The rock-breaking mechanism (3) and the telescopic stepping mechanism (2) are fixedly connected. A bearing ring (10) is provided on the surface of the tension drill rod (1). The telescopic stepping mechanism (2) is detachably connected to the bearing ring (10). The rock-breaking mechanism (3) moves along the axial direction of the tension drill rod (1) through the telescopic stepping mechanism (2). The upper end of the tension drill rod (1) passes through the guide shaft (4) and is fixedly connected to the riser drill (5) fixed on the ground. The lower end of the tension drill rod (1) passes through the guide shaft (4) and enters the lower horizontal roadway (7), and is fixedly connected to the roadway foundation (6). The riser drill (5) pulls back and tightens the tension drill rod (1). The rock-breaking mechanism (3) includes an axial telescopic component (31), a rotary power component (32), and a drill bit (33) arranged sequentially from top to bottom. The rotary power component (32) is fixed to the bottom of the axial telescopic component (31) and outputs rotary power. The drill bit (33) is driven to the power output end at the bottom of the rotary power component (32). The telescopic stepping mechanism (2) is fixedly installed inside the axial telescopic component (31). The tension drill rod (1) passes through the middle of the axial telescopic component (31), the telescopic stepping mechanism (2), the rotary power component (32), and the drill bit (33) in sequence. The telescopic stepping mechanism (2) drives the rotary power component (32) and the drill bit (33) to move along the axial direction of the tension drill rod (1) through the axial telescopic component (31). The telescopic stepping mechanism (2) includes an upper locking component (21), a lower locking component (22), and a stepping cylinder (23). The upper locking component (21) and the lower locking component (22) are connected by the stepping cylinder (23). Both the upper locking component (21) and the lower locking component (22) are detachably connected to the bearing ring (10). The stepping cylinder (23) drives the upper locking component (21) and the lower locking component (22) to move closer to each other or further away from each other.

2. The drill pipe tension type vertical shaft boring machine according to claim 1, characterized in that, The axial telescopic component (31) includes an outer cylinder (311), an inner cylinder (312), and an axial slide rail (313). The inner cylinder (312) is axially slidably fitted inside the outer cylinder (311) via the axial slide rail (313). The upper locking component (21) is fixed to the outer cylinder (311), and the lower locking component (22) passes through the inner cylinder (312) and is connected inside the rotary power component (32).

3. The drill pipe tension type vertical shaft boring machine according to claim 2, characterized in that, The base (321) of the rotary power unit (32) is fixedly connected to the bottom of the inner cylinder (312). A support cylinder (323) is integrally formed inside the base (321) from the end connected to the inner cylinder (312) toward the drill bit (33). The motor assembly (322) of the rotary power unit (32) is arranged in the space of the base (321) above the bottom of the support cylinder (323). The lower locking component (22) is fixed inside the support cylinder (323).

4. The drill pipe tension type vertical shaft boring machine according to any one of claims 1-3, characterized in that, A support frame (8) is fixedly installed on the top of the axial telescopic component (31). A transverse hydraulic support shoe (9) is fixedly installed on the support frame (8) at equal intervals along the circumferential direction. The free end of the transverse hydraulic support shoe (9) is braced against the well wall. The counter-torque generated by the drill bit (33) breaking the rock is transmitted to the transverse hydraulic support shoe (9) through the axial telescopic component (31) and acts on the well wall to achieve counter-torque balance.

5. The drill pipe tension type vertical shaft boring machine according to any one of claims 1-3, characterized in that, The upper locking component (21) and the lower locking component (22) have the same structure; the upper locking component (21) includes a base plate (24), a clamping cylinder (25), a locking insert plate (26), and a top plate (27); the base plate (24) and the top plate (27) are each provided with corresponding through holes, and two parallel steel plates (28) are welded to the base plate (24) and the top plate (27) on both sides of the through holes, and the two steel plates (28) are connected by... A sliding groove is formed between the two steel plates (28), and the locking plate (26) slides in the sliding groove. The clamping cylinder (25) is installed between the two steel plates (28), and the piston rod end of the clamping cylinder (25) is connected to the locking plate (26). The tension drill rod (1) passes through the through hole. The clamping cylinder (25) drives the locking plate (26) to engage with the bearing ring (10) or disengage from the bearing ring (10) to form a detachable connection.

6. The drill pipe tension type vertical shaft boring machine according to claim 1, characterized in that, The roadway foundation (6) includes a bottom beam (601), a threaded locking cap (602), an outer cylinder (603), spokes (604), and an inner ring (605). The bottom beam (601) is horizontally arranged on the top plate of the lower horizontal roadway (7). The lower end of the tension drill rod (1) passes through the bottom beam (601) and is fixedly connected to the bottom beam (601) through the threaded locking cap (602). The outer cylinder (603) is coaxially arranged inside the guide shaft (4) and fits against the shaft wall. The inner ring (605) is coaxially arranged inside the outer cylinder (603) and sleeved on the tension drill rod (1). The inner ring (605) and the outer cylinder (603) are fixedly connected by spokes (604).

7. The drill pipe tension type vertical shaft boring machine according to claim 1, characterized in that, It also includes a hanging plate system (11), which is detachably connected to the bearing ring (10) on the surface of the tension drill rod (1) via a telescopic stepping mechanism (2). The hanging plate system (11) moves along the axial direction of the tension drill rod (1) via the telescopic stepping mechanism (2). The hanging plate system (11) includes multiple interconnected hanging plates, and the telescopic stepping mechanism (2) is fixed together with the uppermost hanging plate.

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