A trenchless pilot drill

Abstract

The application relates to a non-excavation guide drill, which comprises a reinforcing rod, an adapter, a fixing bin, a probe and a guide plate, the reinforcing rod is connected to one end of the adapter, the fixing bin is connected to the other end of the adapter, the probe is installed in the fixing bin, the guide plate is arranged on the fixing bin, a locking assembly is arranged on the fixing bin, the locking assembly comprises a plug-in block and a locking bolt, the plug-in block is connected to the guide plate, a plug-in groove is formed in the fixing bin, the plug-in block is plug-in matched in the plug-in groove, the locking bolt passes through the fixing bin and the plug-in block and is screw matched with the plug-in block. The application has the effect of reducing the maintenance cost of the guide drill.

Description

Technical Field

[0001] This invention relates to the field of trenchless technology, and in particular to a trenchless directional drill. Background Technology

[0002] With the rapid development of China's economy and the increase in national investment in infrastructure construction, trenchless drilling rigs play an irreplaceable role in infrastructure projects. They have advantages such as fast construction speed, convenient pipe removal, and small working well area. Trenchless directional drilling is the key drilling tool for trenchless drilling rigs.

[0003] Chinese patent application CN205260019U discloses a probe mounting structure for trenchless directional drilling, which includes a housing, an internal probe mounting cavity, a probe mounted inside the cavity, a positioning element at the front end of the probe, a locking block on the positioning element, a locking groove on the probe that mates with the locking block, a plug at the rear end of the probe mounting cavity, an annular groove on the outer circumference of the positioning element, an elastic ring inside the annular groove, the positioning element including a locking part and an abutting part, the locking block being located on the locking part, the locking part and the abutting part being axially slidable relative to each other, and the annular groove being formed by splicing the abutting part and the locking part, which can ensure a smooth surface of the housing and avoid problems of sealing and increased friction.

[0004] Regarding the aforementioned technologies, in the prior art, the slant foot is fixedly connected to the forefoot seat. However, when the directional drill is drilling, the drilling direction is changed by the slant foot. Therefore, the slant foot directly rubs against the soil layer, and the slant foot is subjected to the greatest force. The slant foot is susceptible to damage. In the prior art, because the slant foot is fixedly connected to the forefoot seat, the forefoot seat needs to be replaced when the slant foot is replaced, which increases the maintenance cost of the directional drill. Summary of the Invention

[0005] To reduce the maintenance cost of directional drilling, this application provides a trenchless directional drilling system.

[0006] This application provides a trenchless directional drilling solution using the following technical solution:

[0007] A trenchless directional drill includes a reinforcing rod, an adapter, a fixed chamber, a probe, and a guide plate. The reinforcing rod is connected to one end of the adapter, and the fixed chamber is connected to the other end of the adapter. The probe is installed inside the fixed chamber, and the guide plate is disposed on the fixed chamber. A locking assembly is provided on the fixed chamber, the locking assembly including a plug block and a locking bolt. The plug block is connected to the guide plate, and the fixed chamber has a plug groove. The plug block is plugged into the plug groove, and the locking bolt passes through the fixed chamber and the plug block and is threadedly engaged with the plug block.

[0008] By adopting the above technical solution, when installing the guide plate, the operator inserts the connector into the connector slot and rotates the locking bolt to lock the guide plate onto the fixed chamber, thus achieving the installation of the guide plate. The locking assembly enables a detachable connection of the guide plate. When the guide plate needs to be replaced, the operator only needs to loosen the locking bolt to remove it, without needing to replace the fixed chamber, reducing the maintenance cost of the guide drill.

[0009] Optionally, the locking bolt is provided with a first anti-loosening component, which includes a limiting block, a pressing plate, and a clamping spring. The limiting block is slidably fitted at one end of the locking bolt located within the insertion block. The insertion block has a limiting groove matching the shape of the limiting block at the position corresponding to the limiting block. The other end of the locking bolt has a pressing groove. The pressing plate is slidably fitted within the pressing groove. A fixing rod connects the pressing plate and the limiting block. The clamping spring is sleeved on the fixing rod and located between the pressing plate and the bottom wall of the pressing groove. A limiting component is provided within the pressing groove to prevent the pressing plate from disengaging from the pressing groove. When the locking bolt is anti-loosened, the limiting block is partially located within the limiting groove, and the clamping spring is in a compressed state.

[0010] By adopting the above technical solution, when tightening the locking bolt, the worker applies force to the pressing plate, causing the pressing plate to move and drive the limiting block part into the limiting groove. Then, the limiting component is used to limit the movement of the pressing plate, thereby limiting the rotation of the locking bolt and achieving the effect of preventing the locking bolt from loosening.

[0011] Optionally, the limiting component includes a pressing block, a limiting spring, and a fixing block. A movable groove is formed in the pressing groove, the fixing block is connected in the movable groove, the pressing block is slidably fitted in the movable groove, the limiting spring is disposed between the fixing block and the pressing block, a pressing inclined surface is provided at one end of the pressing block near the opening of the pressing groove, and a limiting member is also provided on the pressing block to prevent the pressing block from disengaging from the movable groove.

[0012] By adopting the above technical solution, when the pressing plate is pressed, the clamping spring is compressed, the pressing plate abuts against the clamping inclined surface, causing the clamping block to move and enter the moving groove. The limiting spring is compressed until the pressing plate passes through the moving groove. The clamping block moves in the opposite direction under the force of the limiting spring and is restricted by the limiting component, causing the clamping block to partially move out of the moving groove. When the pressing plate is released, the pressing plate moves in the opposite direction under the force of the clamping spring, causing the pressing plate to abut against the clamping block, thus achieving the effect of restricting the movement of the pressing plate.

[0013] Optionally, the limiting member is a limiting rod, which is connected to the abutment block. The locking bolt has a relief groove at the position corresponding to the limiting member, and the limiting member passes through the relief groove and slides in cooperation with the relief groove.

[0014] By adopting the above technical solution, the staff used the cooperation between the limiting rod and the clearance groove to limit the movement of the clamping block, thus achieving the effect of partially moving the clamping block out of the moving groove.

[0015] Optionally, the fixed chamber has an installation cavity, and the surface of the fixed chamber has several probe slots communicating with the installation cavity. An installation assembly is provided in the installation cavity. The installation assembly includes a positioning post, a plug, and a pressure spring. The positioning post is detachably connected to the bottom of the installation cavity. The plug is threaded into the opening of the installation cavity. The probe is installed between the positioning post and the plug. The pressure spring is located between the plug and the probe and is in a stressed state.

[0016] By adopting the above technical solution, when installing the probe, the worker installs the positioning post at the bottom of the installation cavity, puts in the probe, and installs the probe on the positioning post. Then, the pressure spring is installed at the bottom of the plug, and the plug is threaded into the opening of the installation cavity, so that the pressure spring presses against the probe, thus achieving the effect of installing the probe.

[0017] Optionally, a plurality of fixing screws are provided on the surface of the fixing chamber, and the positioning post has a clamping hole at the position corresponding to the fixing screw. The fixing screw clamps the clamping hole and is threaded into the fixing chamber.

[0018] By adopting the above technical solution, when installing the positioning post, the worker places the positioning post at the bottom of the installation cavity, and then rotates the fixing screw to move the fixing screw until the fixing screw is pressed against the clamping hole, thus realizing the installation of the positioning post.

[0019] Optionally, a second anti-loosening component is provided between the reinforcing rod and the adapter. The second anti-loosening component includes an octagonal sleeve and a retaining ring. The surfaces of the reinforcing rod and the adapter are both octagonal. The surface of the reinforcing rod is aligned with the surface of the adapter. The octagonal sleeve is fitted between the reinforcing rod and the adapter and slides with both the reinforcing rod and the adapter. The retaining ring is threaded onto the reinforcing rod and abuts against the octagonal sleeve.

[0020] By adopting the above technical solution, when connecting the anti-loosening reinforcing rod and the adapter, the worker first threaded the reinforcing rod into the adapter so that the surface of the reinforcing rod and the surface of the adapter are aligned. Then, the octagonal sleeve is placed between the reinforcing rod and the adapter. Finally, the clamping ring is rotated until it clamps against the octagonal sleeve, thereby restricting the rotation of the octagonal sleeve and achieving the effect of connecting the anti-loosening reinforcing rod and the adapter.

[0021] Optionally, the side of the guide plate that initially contacts the soil layer is the stress-bearing side, and a mixing column is connected to both the stress-bearing side and the side of the guide plate.

[0022] By adopting the above technical solution, the staff used the mixing column to stir the soil layer near the directional drill, making the soil layer softer and making it easier for the directional drill to move within the soil layer.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When installing the guide plate, the operator inserts the connector into the connector slot and rotates the locking bolt to lock the guide plate onto the fixed chamber, thus completing the installation of the guide plate. The locking assembly enables a detachable connection of the guide plate. When the guide plate needs to be replaced, the operator only needs to loosen the locking bolt to remove it, without needing to replace the fixed chamber, reducing the maintenance cost of the guide drill.

[0025] 2. When tightening the locking bolt, the worker applies force to the pressing plate, causing the pressing plate to move and drive the limiting block into the limiting groove. Then, the limiting component is used to restrict the movement of the pressing plate, thereby limiting the rotation of the locking bolt and achieving the effect of tightening the locking bolt.

[0026] 3. When the pressing plate is pressed, the clamping spring is compressed, and the pressing plate abuts against the clamping inclined surface, causing the clamping block to move and enter the moving groove. The limiting spring is compressed until the pressing plate passes through the moving groove. The clamping block moves in the opposite direction under the force of the limiting spring and is restricted by the limiting component, causing the clamping block to partially move out of the moving groove. When the pressing plate is released, the pressing plate moves in the opposite direction under the force of the clamping spring, causing the pressing plate to abut against the clamping block, thus achieving the effect of restricting the movement of the pressing plate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a trenchless directional drill in an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the directional drill structure.

[0029] Figure 3 This is an exploded view used in the embodiments of this application to illustrate the structure of the second anti-loosening component.

[0030] Figure 4 This is an exploded view used in the embodiments of this application to illustrate the structure of the installation components.

[0031] Figure 5 This is an exploded view used in the embodiments of this application to illustrate the structure of the locking component.

[0032] Figure 6This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the locking bolt and the first anti-loosening component.

[0033] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0034] Explanation of reference numerals in the attached drawings: 1. Reinforcing rod; 11. Adapter; 12. Washer; 2. Fixing chamber; 21. Mounting cavity; 22. Clamping plane; 23. Probe groove; 3. Probe; 4. Guide plate; 41. Force-bearing edge; 42. Stirring column; 5. Second anti-loosening component; 51. Octagonal sleeve; 52. Clamping ring; 6. Mounting component; 61. Positioning column; 611. Fixing screw; 612. Positioning block; 62. Plug; 621. Mounting column; 622. Sealing ring; 63. Compression spring; 7. Locking assembly; 71. Insertion block; 711. Restriction groove; 72. Locking bolt; 721. Pressing groove; 7211. Moving groove; 722. Receiving groove; 8. First anti-loosening assembly; 81. Restriction block; 82. Pressing plate; 83. Pressing spring; 9. Restriction assembly; 91. Pressing block; 911. Pressing ramp; 912. Restriction element; 92. Restriction spring; 93. Fixing block. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] This application discloses a trenchless directional drilling method. (Refer to...) Figure 1 and Figure 2 A trenchless directional drill includes a reinforcing rod 1, an adapter 11, a fixed chamber 2, a probe 3, and a guide plate 4. The bottom end of the reinforcing rod 1 is threaded into the top end of the adapter 11, and a second anti-loosening component 5 is provided between the reinforcing rod 1 and the adapter 11 to restrict the rotation of the adapter 11. The top end of the fixed chamber 2 is threaded into the bottom end of the adapter 11, and a mounting cavity 21 is provided inside the fixed chamber 2. The probe 3 is disposed within the mounting cavity 21, and a mounting component 6 for securing the probe 3 is provided within the mounting cavity 21. The guide plate 4 is disposed at the bottom of the fixed chamber 2, and a locking component 7 for locking the guide plate 4 is provided on the fixed chamber 2.

[0037] The staff used the second anti-loosening component 5 to secure the connection between the reinforcing rod 1 and the adapter 11, used the installation component 6 to stably install the probe 3 in the installation cavity 21, and then used the locking component 7 to lock the guide plate 4 to the bottom of the fixed chamber 2, thus realizing the installation of the guide drill.

[0038] Reference Figure 3 In order to reduce the possibility of wear on the contact surface between the reinforcing rod 1 and the adapter 11, a washer 12 is fitted on the reinforcing rod 1, and the washer 12 is located between the reinforcing rod 1 and the adapter 11.

[0039] Reference Figure 3 The second anti-loosening component 5 includes an octagonal sleeve 51 and a retaining ring 52. The surfaces of the reinforcing rod 1 and the adapter 11 are both set as regular octagons. The inner wall of the octagonal sleeve 51 matches the shape of the surface of the reinforcing rod 1. The octagonal sleeve 51 is fitted between the reinforcing rod 1 and the adapter 11. The retaining ring 52 is threaded onto the reinforcing rod 1 and abuts against the top of the octagonal sleeve 51.

[0040] When connecting the anti-loosening reinforcing rod 1 and the adapter 11, the worker first threaded the reinforcing rod 1 into the adapter 11 to align the surfaces of the reinforcing rod 1 and the adapter 11. Then, the octagonal sleeve 51 is placed between the reinforcing rod 1 and the adapter 11. Finally, the clamping ring 52 is rotated until it presses against the octagonal sleeve 51, thereby restricting the rotation of the octagonal sleeve 51 and achieving the effect of preventing the loosening of the reinforcing rod 1 and the adapter 11.

[0041] Reference Figure 1 and Figure 2 The top of the fixed chamber 2 is threaded onto the bottom of the adapter 11. The surface of the fixed chamber 2 has two opposing clamping planes 22. The surface of the fixed chamber 2 is also provided with several probe slots 23. In this embodiment, six are used as an example. The probe slots 23 are parallel to the fixed chamber 2. The six probe slots 23 are evenly distributed around the axis of the fixed chamber 2. The probe slots 23 are connected to the mounting cavity 21.

[0042] Reference Figure 2 and Figure 4 The mounting assembly 6 includes a positioning post 61, a plug 62, and a pressure spring 63. The positioning post 61 is located at the bottom of the mounting cavity 21. Several fixing screws 611 pass through the surface of the fixing chamber 2; in this embodiment, two screws are used as an example. The surface of the positioning post 61 has a tightening hole, and the fixing screws 611 tighten into the tightening hole and are threaded into the fixing chamber 2. A positioning block 612 is fixedly connected to the top of the positioning post 61. A positioning groove is formed at the bottom of the probe 3, and the positioning groove is inserted into the positioning block 612. The plug 62 is threaded into the opening of the mounting cavity 21, and the bottom end of the plug 62 is threaded into the mounting post 621. The pressure spring 63 is sleeved on the mounting post 621, and the pressure spring 63 presses against the top of the probe 3.

[0043] When installing probe 3, the operator first places positioning post 61 into installation cavity 21, then rotates fixing screw 611 to make fixing screw 611 abut against positioning post 61. Then, probe 3 is placed into installation cavity 21, and positioning block 612 is inserted into positioning groove. Then, installation post 621 is threaded onto bottom end of plug 62, and pressure spring 63 is sleeved on installation post 621. Then, plug 62 is threaded onto cavity opening of installation cavity 21, so that pressure spring 63 abuts against probe 3, thus completing the installation of probe 3.

[0044] Reference Figure 4In order to improve the sealing performance of the installation cavity 21, a sealing ring 622 is provided on the plug 62. The sealing ring 622 can be a rubber ring and is located between the plug 62 and the fixed chamber 2.

[0045] Reference Figure 1 The side of the guide plate 4 that is in contact with the soil layer at the beginning is the force-bearing side 41. The force-bearing side 41 is set in a V shape. The top of the force-bearing side 41 and the side of the guide plate 4 are both fixedly connected to the mixing column 42. The mixing column 42 is used to loosen the soil layer near the guide drill.

[0046] Reference Figure 5 The locking assembly 7 includes a plug-in block 71 and locking bolts 72. The plug-in block 71 is fixedly connected to the guide plate 4. The bottom of the fixing chamber 2 has a plug-in groove, and the plug-in block 71 is plugged into the plug-in groove. There are two locking bolts 72, which pass through the fixing chamber 2 and the plug-in block 71 and are threadedly engaged with the plug-in block 71.

[0047] When installing the guide plate 4, the workers insert the connector 71 into the connector slot and rotate the locking bolt 72 to achieve the effect of installing the guide plate 4.

[0048] Reference Figure 6 and Figure 7 The locking bolt 72 is equipped with a first anti-loosening component 8, which includes a limiting block 81, a pressing plate 82, and a clamping spring 83. One end of the locking bolt 72 has a pressing groove 721, within which a sliding groove is formed. A sliding block is fixedly connected to the pressing plate 82 at a position corresponding to the sliding groove, and the sliding block slidably engages within the sliding groove. A clamping spring 83 is located within the pressing groove 721, between the pressing plate 82 and the bottom wall of the pressing groove 721.

[0049] Reference Figure 7 A limiting component 9 is provided within the pressing groove 721. The limiting component 9 includes a pressing block 91, a limiting spring 92, and a fixing block 93. Several moving grooves 7211 are formed on the inner wall of the pressing groove 721. In this embodiment, two moving grooves are used as an example. The moving grooves 7211 are perpendicular to the pressing groove 721. The fixing block 93 is fixedly connected to the opening of the moving groove 7211 away from the pressing plate 82. The pressing block 91 is slidably fitted within the moving groove 7211, and a pressing inclined surface 911 is formed on the side wall of the pressing block 91 near the opening of the pressing groove 721. The limiting spring 92 is disposed within the moving groove 7211 and is located between the fixing block 93 and the pressing block 91. A limiting member 912, which is a limiting rod, is fixedly connected to the pressing block 91 and is parallel to the pressing groove 721. The locking bolt 72 has a clearance groove at the position corresponding to the limiting member 912. The limiting member 912 passes through the clearance groove and slides with the clearance groove.

[0050] Reference Figure 6 and Figure 7 The other end of the locking bolt 72 has a receiving groove 722, which is connected to the pressing groove 721. The limiting block 81 is slidably fitted in the receiving groove 722. The limiting block 81 is a regular octagonal block. A fixing rod is fixedly connected between the limiting block 81 and the pressing plate 82. The clamping spring 83 is sleeved on the fixing rod. The plug-in block 71 has a limiting groove 711 that matches the shape of the limiting block 81 at the position corresponding to the limiting block 81.

[0051] When the anti-loosening locking bolt 72 is tightened, the operator applies force to the pressing plate 82, causing the pressing plate 82 to move. The clamping spring 83 is compressed, and the pressing plate 82 contacts the clamping inclined surface 911, causing the clamping block 91 to move into the moving groove 7211. The limiting spring 92 is compressed, and the pressing plate 82 passes the clamping block 91. The clamping block 91 moves in the opposite direction under the force of the limiting spring 92 until the limiting member 912 contacts one end of the relief groove, causing the clamping block 91 to partially move out of the moving groove 7211. The pressing plate 82 is then released, and the pressing plate 82 moves in the opposite direction under the force of the clamping spring 83 until it clamps the clamping block 91. At this time, part of the limiting block 81 is located in the limiting groove 711, and part is located in the receiving groove 722, thus achieving the effect of anti-loosening locking bolt 72.

[0052] The implementation principle of a trenchless directional drill according to an embodiment of this application is as follows: When installing the directional drill, the worker places the washer 12 on the reinforcing rod 1, threads the bottom end of the reinforcing rod 1 onto the top of the adapter 11, then puts on the octagonal sleeve 51, and rotates the clamping ring 52 until the clamping ring 52 clamps the octagonal sleeve 51 to stabilize the adapter 11. The positioning post 61 is placed in the installation cavity 21, and the fixing screw 611 is rotated until the fixing screw 611 clamps the positioning post 61 to stabilize the positioning post 61. Then, the probe 3 is placed in the installation cavity 21, so that the positioning block 612 is inserted into the positioning groove. The installation post 621 is threaded onto the bottom end of the plug 62, the pressure spring 63 is placed on the installation post 621, and the sealing ring 622 is placed on the plug 62. Then, the plug 62 is threaded onto the opening of the installation cavity 21, so that the pressure spring 63 clamps the probe 3 to stabilize it. The probe 3 is threaded onto the bottom of the adapter 11 to secure the fixed chamber 2. Then, the insertion block 71 is inserted into the insertion groove, and the locking bolt 72 is rotated to apply force to the pressing plate 82, causing the pressing plate 82 to move. The clamping spring 83 is compressed, and the pressing plate 82 abuts against the clamping inclined surface 911, causing the clamping block 91 to move into the moving groove 7211. The limiting spring 92 is compressed, and the pressing plate 82 passes the clamping block 91. The clamping block 91 moves in the opposite direction under the force of the limiting spring 92 until the limiting member 912 abuts against one end of the clearance groove, causing the clamping block 91 to partially move out of the moving groove 7211. The pressing plate 82 is released, and the pressing plate 82 moves in the opposite direction under the force of the clamping spring 83 until it abuts against the clamping block 91. At this time, part of the limiting block 81 is located in the limiting groove 711, and part is located in the receiving groove 722, to secure the guide plate 4, thus realizing the installation of the guide drill.

[0053] Workers use locking assembly 7 to detach guide plate 4 from fixed chamber 2. When guide plate 4 needs to be replaced, workers move limiting component 912 to move pressing block 91, causing pressing plate 82 to move. Limiting block 81 disengages from limiting groove 711, and locking bolt 72 can be loosened to replace guide plate 4 without replacing fixed chamber 2, thus reducing maintenance costs of guide drill.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A trenchless directional drill, characterized in that: The assembly includes a reinforcing rod (1), an adapter (11), a fixed chamber (2), a probe (3), and a guide plate (4). The reinforcing rod (1) is connected to one end of the adapter (11), and the fixed chamber (2) is connected to the other end of the adapter (11). The probe (3) is installed inside the fixed chamber (2), and the guide plate (4) is mounted on the fixed chamber (2). A locking assembly (7) is provided on the fixed chamber (2). The locking assembly (7) includes a plug-in block (71) and a locking bolt (72). The plug-in block (71) is connected to the guide plate (4), and the fixed chamber (2) has a plug-in groove for plugging in and engaging. Within the insertion slot, the locking bolt (72) passes through the fixing chamber (2) and the insertion block (71), and is threadedly engaged with the insertion block (71); a first anti-loosening component (8) is provided on the locking bolt (72), the first anti-loosening component (8) including a limiting block (81), a pressing plate (82) and a clamping spring (83), the limiting block (81) is slidably engaged with one end of the locking bolt (72) located within the insertion block (71), the insertion block (71) has a limiting groove (711) matching the shape of the limiting block (81) at the position corresponding to the position of the limiting block (81), and the other end of the locking bolt (72) has a... The pressing groove (721) has a pressing plate (82) that slides within it. A fixing rod connects the pressing plate (82) and the limiting block (81). A retaining spring (83) is sleeved on the fixing rod and located between the pressing plate (82) and the bottom wall of the pressing groove (721). A limiting component (9) is provided in the pressing groove (721) to restrict the pressing plate (82) from disengaging from the pressing groove (721). When the locking bolt (72) is loosened, part of the limiting block (81) is located in the limiting groove (711), and the retaining spring (83) is under pressure. The limiting component (9) includes... The assembly includes a clamping block (91), a limiting spring (92), and a fixing block (93). The pressing groove (721) has a moving groove (7211). The fixing block (93) is connected to the moving groove (7211). The clamping block (91) is slidably fitted in the moving groove (7211). The limiting spring (92) is disposed between the fixing block (93) and the clamping block (91). The clamping block (91) has a clamping inclined surface (911) at one end near the opening of the pressing groove (721). The clamping block (91) is also provided with a limiting member (912) that restricts the clamping block (91) from disengaging from the moving groove (7211).A second anti-loosening component (5) is provided between the reinforcing rod (1) and the adapter (11). The second anti-loosening component (5) includes an octagonal sleeve (51) and a clamping ring (52). The surfaces of the reinforcing rod (1) and the adapter (11) are both octagonal. The surface of the reinforcing rod (1) is aligned with the surface of the adapter (11). The octagonal sleeve (51) is fitted between the reinforcing rod (1) and the adapter (11) and slides with the reinforcing rod (1) and the adapter (11). The clamping ring (52) is threaded onto the reinforcing rod (1) and clamps against the octagonal sleeve (51).

2. The trenchless directional drill according to claim 1, characterized in that: The limiting member (912) is a limiting rod. The limiting member (912) is connected to the abutment block (91). The locking bolt (72) has a relief groove at the position corresponding to the limiting member (912). The limiting member (912) passes through the relief groove and slides with the relief groove.

3. The trenchless directional drill according to claim 1, characterized in that: The fixed chamber (2) has an installation cavity (21) inside. The surface of the fixed chamber (2) has several probe slots (23) that communicate with the installation cavity (21). The installation cavity (21) is provided with an installation assembly (6). The installation assembly (6) includes a positioning post (61), a plug (62) and a pressure spring (63). The positioning post (61) is detachably connected to the bottom of the installation cavity (21). The plug (62) is threaded into the opening of the installation cavity (21). The probe (3) is installed between the positioning post (61) and the plug (62). The pressure spring (63) is located between the plug (62) and the probe (3). The pressure spring (63) is in a stressed state.

4. A trenchless directional drill according to claim 3, characterized in that: The surface of the fixed chamber (2) is provided with a plurality of fixing screws (611). The positioning post (61) has a tightening hole at the position corresponding to the fixing screw (611). The fixing screw (611) tightens against the tightening hole and is threadedly engaged with the fixed chamber (2).

5. A trenchless directional drill according to claim 1, characterized in that: The side of the guide plate (4) that is in contact with the soil layer at the beginning is the force-bearing side (41), and a stirring column (42) is connected to both the force-bearing side (41) and the side of the guide plate (4).

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