Self-anchored soil layer auxiliary drilling protection device

Abstract

The invention discloses a self-anchored soil layer auxiliary drilling protection device, and relates to the technical field of drilling auxiliary equipment, the self-anchored soil layer auxiliary drilling protection device comprises a frame body, a sleeve is mounted in the frame body, an inner thread sleeve is fixedly mounted in the sleeve, a propelling assembly is in threaded connection with the inner thread sleeve, a driving assembly is fixedly connected to the outer wall of the sleeve, and the driving assembly is in transmission connection with the propelling assembly; rectangular adjusting grooves are formed in the front side, the rear side and the left side of the frame correspondingly, adjusting rods are installed in the rectangular adjusting grooves, the ends of the adjusting rods are connected with the sleeves, a protection assembly is detachably connected to the bottom of the propelling assembly, spiral ribs used for conveying soil residues are integrally arranged on the outer side of the protection assembly, and an end clamping plate is detachably connected to the bottom of the protection assembly. A reaming blade is integrally arranged on the outer side of the end clamping plate, a conical drill bit is installed at the bottom of the end clamping plate, a spiral blade is integrally arranged on the outer side of the conical drill bit, and a tool bit is fixedly connected to the bottom of the conical drill bit. The device is simple in structure, reasonable in design and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of drilling auxiliary equipment, and in particular to a self-anchored soil layer auxiliary drilling protection device. Background Art

[0002] In soil protection projects such as foundation pits and slopes, anchor rods have the advantages of strong adaptability, simple construction and installation, high space utilization, low cost and long service life, and are widely used in actual projects such as initial support or final support of soil. In some foundation pit reinforcement projects, the working area is small and mechanized operation is not possible, so a self-drilling reinforcement system has been developed. For example, "A self-drilling prestressed soil nail and construction method" (CN110409469A) proposes a method of self-drilling and anchoring through nail tips, nail rods and spirals, but it fails to truly achieve self-drilling and still requires the help of auxiliary machinery. Another example is "A self-drilling soil nail and reinforced retaining wall connection system and method" (CN111254949A). This invention connects self-drilling soil nails and reinforced retaining walls through connecting structural members to increase the overall stability of the structure, but the steps are cumbersome and the applicable conditions are single.

[0003] In particular, the anchor rod lacks a self-drilling prestressed anchor rod that integrates multiple functions such as automatic hole enlargement and discharge of rock and soil debris and does not require external auxiliary machinery.

[0004] Therefore, there is an urgent need for a self-anchored soil layer auxiliary drilling protection device to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a self-anchored soil layer auxiliary drilling protection device to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a self-anchored soil layer auxiliary drilling protection device, comprising a frame, a casing is installed in the frame, an inner threaded sleeve is fixedly installed in the casing, a propulsion assembly is connected to the inner thread of the inner threaded sleeve, a driving assembly is fixedly connected to the outer wall of the casing, and the driving assembly is transmission-connected to the propulsion assembly, rectangular adjustment grooves are respectively provided on the front and rear sides and the left side of the frame, an adjustment rod is installed in the rectangular adjustment groove, and the end of the adjustment rod is connected to the casing, a protection assembly is detachably connected to the bottom of the propulsion assembly, a spiral rib for conveying soil debris is integrally provided on the outer side of the protection assembly, a plurality of end clamps are detachably connected to the bottom of the protection assembly, a reaming blade is fixedly connected to the end clamp, a conical drill bit is installed at the bottom of the end clamp, a spiral blade is integrally provided on the outer side of the conical drill bit, and a cutter head is fixedly connected to the bottom of the conical drill bit, one end of the steel strand passes through the propulsion assembly and is welded to the top center position of the conical drill bit.

[0007] Preferably, the driving assembly includes a support plate fixed to the sleeve, a motor is fixed to the top surface of the support plate, a transmission shaft is fixed to the output shaft of the motor, a multi-section telescopic rod is installed at the bottom of the transmission shaft by bolts, a gear is fixed to the bottom of the multi-section telescopic rod, and the gear is transmission-connected to the propulsion assembly.

[0008] Preferably, the propulsion assembly includes a hollow screw threadedly connected to the inner sleeve, a toothed ring is provided on the fixed sleeve of the hollow screw, the toothed ring is meshed with the gear, the bottom of the toothed ring is in contact with an auxiliary plate, the auxiliary plate is rotatably connected to the outer ring shell wall of the hollow screw, the bottom of the gear is rotatably connected to the auxiliary plate, the bottom end of the hollow screw is fixedly connected to a mounting plate, and the mounting plate is detachably connected to the protective assembly.

[0009] Preferably, the protection assembly includes a plurality of staggered end hole protection members and hole protection connectors, the end hole protection member located at the top is detachably connected to the mounting plate, and the end hole protection member located at the bottom is detachably connected to the end clamping plate.

[0010] Preferably, the end hole guard piece and the hole guard connecting piece are respectively formed by splicing two semicircular end hole guard plates and two semicircular connecting hole guard plates, the end hole guard plates and the connecting hole guard plates have the same structure, the bottom surface of the tubular structure formed by splicing the two end hole guard plates is provided with a plurality of end clamping grooves for clamping the end clamping plates along the circumferential direction, the spiral ribs are integrally provided on the outer surface of the end hole guard plates, a slider group is integrally provided on the right side shell wall of the left end hole guard plate, and a slide groove group for fitting with the slider group is provided on the left side shell wall of the right end hole guard plate.

[0011] Preferably, the two end perforated plates are assembled through the slider group and the slide groove group, the slider group is composed of four sliders, and the four sliders are grouped in pairs and are respectively arranged on the corresponding side walls of the left end perforated plate, each of the end perforated plates is provided with a through hole on the front and rear side shell walls, the through holes between the end perforated plates on both sides correspond to each other and are fixedly connected by fastening bolts, and an ear plate is installed on the top outer wall of each end perforated plate, the ear plates on adjacent end perforated plates and the connecting perforated plates correspond to each other and are fixedly connected by bolts, and the ear plates on the end perforated plates are fixedly connected to the mounting plate by bolts.

[0012] Preferably, a carrier plate is movably connected in the rectangular adjustment groove, and a passing groove is longitudinally opened on the carrier plate, wherein a ring is slidably connected in the passing groove on the front side, and an inner grooved ring is slidably connected in the passing grooves on the rear side and the left side, the front end of the adjustment rod on the front side passes through the ring, and a buffer spring located on the corresponding adjustment rod is sleeved behind the ring.

[0013] Preferably, the rear end of the adjusting rod on the rear side passes through the corresponding inner groove ring and is installed with an adjusting handle 1, and the adjusting rod on the rear side is threadedly connected with the corresponding inner groove ring, and a limiting sleeve located on the corresponding adjusting rod is threadedly connected between the frame and the adjusting handle 1, and the limiting sleeve is used to limit the longitudinal adjustment of the sleeve.

[0014] Preferably, the left end of the adjusting rod on the left side passes through the corresponding inner groove ring and is equipped with an adjusting handle 2, and the adjusting rod on the left side is threadedly connected to the corresponding inner groove ring, and a limiting sleeve located on the corresponding adjusting rod is also provided between the frame and the adjusting handle 2, and the limiting sleeve is used to limit the lateral adjustment of the sleeve.

[0015] Preferably, four corners of the bottom surface of the frame are respectively fixed with support feet, and the bottoms of the support feet extend into the ground.

[0016] The present invention discloses the following technical effects: the present invention combines a driving component, a propulsion component and a conical drill bit, and then under the action of rotational propulsion, the protective component drives the conical drill bit to perform a rotational drilling movement, so that it can continuously drill into the rock and soil. During the drilling process, automatic slag discharge is achieved through the setting of spiral ribs, and at the same time, it plays a role in protecting the hole, thereby ensuring the overall automation and maintaining normal operation for a long time; the device of the present invention has a simple structure, reasonable design and convenient operation; when the driving component rotates in the opposite direction, the propulsion component rotates outward and grouting is carried out at the same time, the slurry gradually diffuses to the surrounding of the steel strand and condenses, increasing the friction resistance, and after reaching a certain strength, the steel strand is tensioned to apply prestress, thereby forming a prestressed anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a self-anchored soil layer auxiliary drilling protection device;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged local structure at A;

[0021] Figure 4 is a schematic diagram of the structure of the drive component;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure viewed from above;

[0023] Figure 6 for Figure 5 A schematic diagram of the enlarged local structure at B;

[0024] Figure 7 for Figure 1 Exploded view of protective components;

[0025] Figure 8 for Figure 7 An enlarged schematic diagram of the local structure at location C.

[0026] In the figure: 1. cutter head; 2. conical drill bit; 3. spiral blade; 4. end clamping plate; 5. reaming blade; 6. end hole guard plate; 7. connecting hole guard plate; 8. frame; 9. supporting foot; 10. carrier plate; 11. casing; 12. adjusting rod; 13. inner groove sleeve; 14. propulsion assembly; 141. hollow screw; 142. gear ring; 143. auxiliary plate; 144. mounting plate; 15. driving assembly; 151. motor; 152. transmission shaft; 153. multi-section telescopic rod; 154. gear; 16. limit sleeve; 17. steel strand; 18. end clamping groove; 19. spiral rib; 20. slider group; 21. slide groove group; 22. fastening bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 8As shown, this embodiment provides a self-anchored soil layer auxiliary drilling protection device, including a frame 8, a casing 11 is installed in the frame 8, an inner threaded sleeve 13 is fixedly installed in the casing 11, and a propulsion assembly 14 is connected to the inner thread of the inner threaded sleeve 13. A driving assembly 15 is fixedly connected to the outer wall of the casing 11, and the driving assembly 15 is transmission-connected to the propulsion assembly 14. Rectangular adjustment grooves are respectively opened on the front and rear sides and the left side of the frame 8, and an adjustment rod 12 is installed in the rectangular adjustment groove. The end of the adjustment rod 12 is connected to the casing 11. The bottom of the propulsion assembly 14 is detachably connected to a protection assembly, and a spiral rib 19 for conveying soil debris is integrally arranged on the outer side of the protection assembly. A plurality of end clamps 4 are detachably connected to the bottom of the protection assembly, and a hole-reaming blade 5 is fixedly connected to the end clamp 4. A conical drill bit 2 is installed at the bottom of the end clamp 4, and a spiral blade 3 is integrally arranged on the outer side of the conical drill bit 2. A cutter head 1 is fixedly connected to the bottom of the conical drill bit 2. One end of the steel strand 17 passes through the propulsion assembly 14 and is welded to the top center of the conical drill bit 2. The setting range of the end clamps 4 is two to six, and four are used in this embodiment. The opening diameter of the hole-reaming blade 5 is smaller than the opening diameter of the protection assembly.

[0030] The present invention combines a driving component 15, a propulsion component 14 and a conical drill bit 2, and then under the action of rotational propulsion, the protective component drives the conical drill bit 2 to perform a rotational drilling movement, so that it can continuously drill into the rock and soil. During the drilling process, automatic slag discharge is achieved through the setting of the spiral ribs 19, and at the same time, it plays a role in protecting the hole, thereby ensuring the overall automation and maintaining normal operation for a long time; the device of the present invention has a simple structure, reasonable design and convenient operation; when the driving component 15 rotates in the opposite direction, the propulsion component 14 rotates outward and grouting is carried out at the same time. The slurry gradually diffuses to the surrounding of the steel strand 17 and condenses, increasing the friction resistance. After reaching a certain strength, the steel strand 17 is tensioned to apply prestress, thereby forming a prestressed anchor rod.

[0031] Further optimization scheme, the driving assembly 15 includes a support plate fixed to the sleeve 11, a motor 151 is fixed to the top surface of the support plate, a transmission shaft 152 is fixed to the output shaft of the motor 151, a multi-section telescopic rod 153 is bolted to the bottom of the transmission shaft 152, a gear 154 is fixed to the bottom of the multi-section telescopic rod 153, and the gear 154 is connected to the propulsion assembly 14. The operation of the motor 151 drives the multi-section telescopic rod 153 to perform synchronous rotation through the transmission shaft 152, thereby driving the propulsion assembly 14 to rotate; the rotary feeding action is realized by driving with a single motor 151, reducing the setting of related supporting drive structures, optimizing the equipment structure, further reducing the production cost of the equipment, and facilitating the promotion and use of the equipment.

[0032] A further optimized solution is that the propulsion assembly 14 includes a hollow screw 141 threadedly connected to the inner sleeve 13, a toothed ring 142 is provided on the fixed sleeve of the hollow screw 141, the toothed ring 142 is meshed with the gear 154, the bottom of the toothed ring 142 is in contact with an auxiliary plate 143, the auxiliary plate 143 is rotatably connected to the outer ring shell wall of the hollow screw 141, the bottom of the gear 154 is rotatably connected to the auxiliary plate 143, the bottom end of the hollow screw 141 is fixedly connected to a mounting plate 144, and the mounting plate 144 is detachably connected to the protective assembly. The auxiliary plate 143 is rotatably connected to the hollow screw 141, so that when the hollow screw 141 moves, the auxiliary plate 143 can cooperate with other structures to stay in place; the bottom end of the multi-section telescopic rod 153 is rotatably connected to the auxiliary plate 143, and a gear 154 located on the multi-section telescopic rod 153 is provided above the auxiliary plate 143, and the gear 154 is meshed with the gear ring 142 for transmission. The multi-section telescopic rod 153 drives the gear 154 to rotate, and the gear 154 is meshed with the gear ring 142 for transmission, thereby causing the hollow screw 141 to rotate. When the hollow screw 141 is threadedly connected to the inner sleeve 13, the rotation of the hollow screw 141 causes it to perform a rotational lifting adjustment, and when the hollow screw 141 is performing a lifting adjustment, due to the provision of the auxiliary plate 143, the multi-section telescopic rod 153 performs a synchronous telescopic movement, thereby ensuring the meshing between the gear 154 and the gear ring 142.

[0033] In a further optimized solution, the protection assembly includes a plurality of staggered end hole guards and hole guard connectors, the uppermost end hole guard is detachably connected to the mounting plate 144, and the lowermost end hole guard is detachably connected to the end clamping plate 4. The hole guard connector has the same shape as the end hole guard, and is used to ensure the consistency of the drilled holes. The splicing design between the end hole guard and the hole guard connector can be spliced ​​together to form anchor holes of different lengths.

[0034] A further optimized solution is that the end hole guards and the hole guard connecting pieces are respectively formed by splicing two semicircular end hole guard plates 6 and two semicircular connecting hole guard plates 7. The end hole guard plates 6 and the connecting hole guard plates 7 have the same structure. The bottom surface of the tubular structure formed by splicing the two end hole guard plates 6 is provided with a plurality of end clamping grooves 18 for clamping the end clamping plates 4 along the circumferential direction. The outer surface of the end hole guard plates 6 is integrally provided with spiral ribs 19. A slider group 20 is integrally provided on the right side shell wall of the left end hole guard plate 6. A slide groove group 21 for fitting the slider group 20 is provided on the left side shell wall of the right end hole guard plate 6. The end hole guard of the tubular structure ensures the forming of the anchor hole. The number of the end slots 18 is consistent with the end clamping plate 4, which is used to ensure the overall stable operation. The setting of the spiral ribs 19 can discharge the soil debris generated after the product is drilled. When the two end hole guarding plates 6 are combined, the spiral ribs 19 arranged thereon form a continuous spiral structure; the cooperation of the slider group 20 and the slide groove group 21 can realize the smooth combination and disassembly of the two end hole guarding plates 6, thereby facilitating the disassembly and assembly of the product.

[0035] Further optimization scheme, the two end hole guard plates 6 are assembled through the slider group 20 and the slide groove group 21, the slider group 20 is composed of four sliders, and the four sliders are grouped in pairs, respectively arranged on the corresponding side walls of the left end hole guard plate 6, each end hole guard plate 6 has a through hole on the front and rear side shell walls, the through holes between the end hole guard plates 6 on both sides correspond to each other, and are fixedly connected by fastening bolts 22, and each end hole guard plate 6 is installed on the top outer wall, the adjacent end hole guard plates 6 and the connecting hole guard plates 7 correspond to each other and are fixedly connected by bolts, and the lug plates on the end hole guard plates 6 are fixedly connected to the mounting plate 144 by bolts. The provision of the fastening bolts 22 can stably assemble the two end hole guard plates 6 after combination.

[0036] The tubular parts formed by the two-half design are assembled by sliding splicing, and then assisted by fastening bolts 22 to achieve the stability of the assembly. It is not only convenient for disassembly and assembly, but also ensures its stability and safety when used for drilling. The two-half design also allows for convenient disassembly and assembly, which facilitates the removal operation when exiting the hole.

[0037] Further optimization scheme, the rectangular adjustment groove is movably connected with the carrier plate 10, and the carrier plate 10 is provided with a longitudinal passage groove, wherein a collar is slidably connected in the front passage groove, and an inner groove ring is slidably connected in the rear and left passage grooves, and the front end of the front adjustment rod 12 passes through the collar, and the rear of the collar is provided with a buffer spring located on the corresponding adjustment rod 12. The arrangement of the collar and the inner groove ring in the corresponding passage groove is used to ensure the lifting and lowering adjustment of the sleeve 11, thereby facilitating the assembly and disengagement between the end hole guards. The arrangement of the buffer spring can buffer the movement of the sleeve 11 in the longitudinal adjustment, and the front adjustment rod 12 is fixedly connected to the sleeve 11 to provide stable support for the sleeve 11.

[0038] Further optimized solution, the rear end of the rear adjustment rod 12 passes through the corresponding inner ring, and is installed with an adjustment handle 1, and the rear adjustment rod 12 is threadedly connected with the corresponding inner ring, and the frame 8 and the adjustment handle 1 are threadedly connected with a limit sleeve 16 located on the corresponding adjustment rod 12, and the limit sleeve 16 is used for longitudinal adjustment of the limit sleeve 16 tube 11. The rear adjustment rod 12 is rotatably connected with the sleeve 11, so that the rotation adjustment of the rear adjustment rod 12 can be realized; a friction pad is arranged on the rear outer wall of the frame 8, and the stability of the sleeve 11 during use is ensured through the contact between the limit sleeve 16 and the friction pad.

[0039] Further optimized solution, the left end of the left adjustment rod 12 passes through the corresponding inner ring, and is installed with the second adjustment handle, and the left adjustment rod 12 is threadedly connected with the corresponding inner ring, and a limiting sleeve 16 located on the corresponding adjustment rod 12 is also sleeved between the frame 8 and the second adjustment handle, and the limiting sleeve 16 is used for lateral adjustment of the limiting sleeve 16 tube 11. A friction pad is also provided on the left outer wall of the frame 8 to improve the limiting effect of the limiting sleeve 16.

[0040] In a further optimized solution, the four corners of the bottom surface of the frame 8 are respectively fixed with support feet 9, and the bottom of the support feet 9 extends into the ground. The support feet 9 are arranged to facilitate the stable arrangement of the frame 8 on the ground.

[0041] Working principle: First check whether each component is complete, and then fix the support feet 9 on the frame 8 to the ground. Before drilling, the drilling position of the anchor rod is adjusted by adjusting the position of the casing 11 in the tail propulsion mechanism.

[0042] When the sleeve 11 in the tail propulsion mechanism is first adjusted laterally, the limiting sleeve 16 on the left and rear adjusting rods 12 in the tail propulsion mechanism is adjusted to cancel the contact between the limiting sleeve 16 and the corresponding side wall of the frame 8, and then the adjusting handle 2 on the rear adjusting rod 12 is adjusted to make the rear adjusting rod 12 movable, and the adjusting rod 12 moves in cooperation with the corresponding inner ring, and the front and rear adjusting rods 12 and the corresponding sleeve 11 are driven to perform lateral displacement adjustment inside the frame 8.

[0043] When the sleeve 11 is adjusted to a proper position laterally, the adjustment handle 1 on the rear adjustment rod 12 in the tail propulsion mechanism is adjusted. The rear adjustment rod 12 cooperates with the corresponding inner ring during the rotation process to achieve the longitudinal movement adjustment of the sleeve 11 inside the frame 8. When the sleeve 11 moves longitudinally, the front adjustment rod 12 moves in the corresponding collar, and the buffer spring moves accordingly, thereby ensuring the stability of the displacement adjustment of the sleeve 11.

[0044] After the position of the sleeve 11 is adjusted, the corresponding limiting sleeve 16 is adjusted again to contact and limit the corresponding side wall of the frame 8, so as to ensure the stability of the position of the sleeve 11.

[0045] After the position of the casing 11 is determined, one end of the steel strand 17 is passed through the hollow screw 141 of the propulsion assembly 14 and welded to the top center of the conical drill bit 2. Then the end hole guard is mounted on the upper steel strand 17 in a splicing manner to wrap the steel strand 17. After the end hole guard has wrapped the steel strand 17, the ear plate at the top position of the end hole guard plate 6 is fixedly connected to the mounting plate 144 in the propulsion assembly 14 by bolts.

[0046] After the end hole guard is assembled with the propulsion assembly 14 , each end clamping groove 18 on the bottom thereof is clamped with the end clamping plate 4 at the lower position thereof.

[0047] Then, by starting the motor 151 in the driving assembly 15, the multi-section telescopic rod 153 rotates under the action of the transmission shaft 152, thereby driving the gear 154 to rotate. The gear 154 is meshed with the gear ring 142 in the propulsion assembly 14, so that the hollow screw 141 drives the mounting plate 144 to rotate synchronously.

[0048] During the rotation of the hollow screw 141, the mounting plate 144 drives the end hole guard mounted thereon to rotate synchronously, and finally causes the end clamping plate 4 engaged with the end hole guard to move synchronously. Since the cutter head 1 contacts the ground, and the hollow screw 141 is threadedly matched with the inner threaded sleeve 13 in the casing 11, the cutter head 1 is rotated downward during the rotation process to realize the drilling action in the rock and soil.

[0049] When the end hole guard piece needs to continue drilling after being drilled into the soil layer, the end hole guard piece is removed from the mounting plate 144 in the propulsion assembly 14, and then the motor 151 in the drive assembly 15 is started in reverse to reset the propulsion assembly 14. Finally, the hole guard connector is assembled with the end hole guard piece to wrap the steel strand 17, and then the top is connected to the mounting plate 144 and the bottom is connected to the end hole guard piece to achieve splicing between the end hole guard piece and the hole guard connector.

[0050] After the splicing is completed, the motor 151 in the driving assembly 15 is started again to run forward. In this way, the ground is drilled in a reciprocating manner, and the end hole guards and the hole guard connectors are selectively spliced ​​according to the depth of the hole to be drilled.

[0051] After the hole is drilled to the specified depth, the limit sleeve 16 set on the left side is loosened again, and then the sleeve 11 is lifted up as a whole. Due to the setting of the passage groove, the sleeve 11 can be lifted up for a short distance, so as to separate the end clamping plate 4 from the end clamping groove 18 in the end hole guard. Then, the hollow screw 141, the end hole guard and the hole guard connector are grouting into the pipe, and the reverse operation of the motor 151 in the driving assembly 15 is started while grouting, so that the end hole guard and the hole guard connector are rotated outward. When the hole guard connector leaves the hole, the operation of the motor 151 in the driving assembly 15 is first turned off, and the grouting is stopped. Then the hole guard connector is removed from the mounting plate 144 in the propulsion assembly 14 and the end hole guard, and each fastening bolt 22 on the hole guard connector is removed. Finally, the two connecting hole guard plates 7 are separated in a smooth forward and backward motion, so as to facilitate the disassembly of the hole guard connector.

[0052] After the hole guard connector is disassembled, the end hole guard is spliced ​​with the mounting plate 144 in the propulsion assembly 14. The motor 151 in the drive assembly 15 is started again to run in reverse, and the grouting operation is performed again. When the end hole guard is completely out of the hole, the above operation is repeated to realize the disassembly operation of the end hole guard. After the grouting body reaches a certain strength, the steel strand 17 is then tensioned outward to form a prestressed anchor rod.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A self-anchored soil layer auxiliary drilling protection device, characterized in that: The invention comprises a frame (8), wherein a sleeve (11) is installed in the frame (8), an inner thread sleeve (13) is fixedly installed in the sleeve (11), a propulsion assembly (14) is connected to the inner thread sleeve (13), a driving assembly (15) is fixedly connected to the outer wall of the sleeve (11), and the driving assembly (15) is transmission-connected to the propulsion assembly (14), and rectangular adjustment grooves are respectively provided on the front and rear sides and the left side of the frame (8), an adjustment rod (12) is installed in the rectangular adjustment groove, the end of the adjustment rod (12) is connected to the sleeve (11), and the propulsion assembly (14) A protective component is detachably connected to the bottom, and a spiral rib (19) for conveying soil debris is integrally arranged on the outer side of the protective component. A plurality of end clamps (4) are detachably connected to the bottom of the protective component, and a hole expansion blade (5) is fixedly connected to the end clamp (4). A conical drill bit (2) is installed at the bottom of the end clamp (4), and a spiral blade (3) is integrally arranged on the outer side of the conical drill bit (2). A cutter head (1) is fixedly connected to the bottom of the conical drill bit (2). One end of the steel strand (17) passes through the propulsion component (14) and is welded to the top center position of the conical drill bit (2).

2. The self-anchored soil layer auxiliary drilling protection device according to claim 1 is characterized in that: The driving assembly (15) comprises a support plate fixedly connected to the sleeve (11); a motor (151) is fixedly connected to the top surface of the support plate; an output shaft of the motor (151) is fixedly connected to a transmission shaft (152); a multi-section telescopic rod (153) is mounted on the bottom of the transmission shaft (152) via bolts; a gear (154) is fixedly connected to the bottom of the multi-section telescopic rod (153); and the gear (154) is transmission-connected to the propulsion assembly (14).

3. The self-anchored soil layer auxiliary drilling protection device according to claim 2 is characterized in that: The propulsion assembly (14) comprises a hollow screw (141) threadedly connected to the inner threaded sleeve (13); a fixed sleeve on the hollow screw (141) is provided with a toothed ring (142); the toothed ring (142) is meshed with the gear (154); the bottom of the toothed ring (142) contacts an auxiliary plate (143); the auxiliary plate (143) is rotatably connected to the outer ring shell wall of the hollow screw (141); the bottom of the gear (154) is rotatably connected to the auxiliary plate (143); the bottom end of the hollow screw (141) is fixedly connected to a mounting plate (144); the mounting plate (144) is detachably connected to the protective assembly.

4. The self-anchored soil layer auxiliary drilling protection device according to claim 3 is characterized in that: The protection assembly comprises a plurality of staggered end hole protection members and hole protection connecting members, wherein the end hole protection member located at the top is detachably connected to the mounting plate (144), and the end hole protection member located at the bottom is detachably connected to the end clamping plate (4).

5. The self-anchored soil layer auxiliary drilling protection device according to claim 4 is characterized in that: The end hole guard piece and the hole guard connecting piece are respectively formed by splicing two semicircular end hole guard plates (6) and two semicircular connecting hole guard plates (7). The end hole guard plates (6) and the connecting hole guard plates (7) have the same structure. The bottom surface of the tubular structure formed by splicing the two end hole guard plates (6) is provided with a plurality of end clamping grooves (18) for clamping the end clamping plate (4) along the circumferential direction. The outer surface of the end hole guard plate (6) is integrally provided with the spiral rib (19). A slider group (20) is integrally provided on the right side shell wall of the left end hole guard plate (6). A slide groove group (21) for fitting with the slider group (20) is provided on the left side shell wall of the right end hole guard plate (6).

6. The self-anchored soil layer auxiliary drilling protection device according to claim 5 is characterized in that: The two end hole guard plates (6) are assembled through the slider group (20) and the slide groove group (21). The slider group (20) is composed of four sliders. The four sliders are arranged in groups of two and are respectively arranged on the corresponding side walls of the left end hole guard plate (6). Each end hole guard plate (6) is provided with a through hole on the front and rear side shell walls. The through holes between the end hole guard plates (6) on both sides correspond to each other and are fixedly connected by fastening bolts (22). A lug plate is installed on the top outer wall of each end hole guard plate (6). The lug plates on adjacent end hole guard plates (6) and the connecting hole guard plate (7) correspond to each other and are fixedly connected by bolts. The lug plates on the end hole guard plates (6) are fixedly connected to the mounting plate (144) by bolts.

7. The self-anchored soil layer auxiliary drilling protection device according to claim 1 is characterized in that: A carrier plate (10) is movably connected in the rectangular adjustment groove, and a passage groove is longitudinally opened on the carrier plate (10), wherein a sleeve is slidably connected in the front passage groove, and an inner groove ring is slidably connected in the rear and left passage grooves, and the front end of the front adjustment rod (12) passes through the sleeve ring, and a buffer spring located on the corresponding adjustment rod (12) is sleeved behind the sleeve ring.

8. The self-anchored soil layer auxiliary drilling protection device according to claim 7 is characterized in that: The rear end of the rear adjustment rod (12) passes through the corresponding inner groove ring and is installed with an adjustment handle 1, and the rear adjustment rod (12) is threadedly connected to the corresponding inner groove ring, and a limiting sleeve (16) located on the corresponding adjustment rod (12) is threadedly connected between the frame (8) and the adjustment handle 1, and the limiting sleeve (16) is used to limit the longitudinal adjustment of the sleeve (11).

9. The self-anchored soil layer auxiliary drilling protection device according to claim 8, characterized in that: The left end of the left adjusting rod (12) passes through the corresponding inner groove ring and is provided with an adjusting handle 2, and the left adjusting rod (12) is threadedly connected to the corresponding inner groove ring. A limiting sleeve (16) located on the corresponding adjusting rod (12) is also sleeved between the frame (8) and the adjusting handle 2, and the limiting sleeve (16) is used to limit the lateral adjustment of the sleeve (11).

10. The self-anchored soil layer auxiliary drilling protection device according to claim 1, characterized in that: Support feet (9) are fixedly connected to the four corners of the bottom surface of the frame (8), and the bottoms of the support feet (9) extend into the ground.

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