Drilling equipment for underground diaphragm wall construction

Abstract

The invention discloses drilling equipment for underground diaphragm wall construction, and particularly relates to the technical field of building construction drilling, the drilling equipment comprises a rack, a top plate, a fixed rotating pipe, a telescopic rotating pipe, a drill rod and a drill bit, the drill rod and the telescopic rotating pipe are connected through a universal rotating driving part, and the telescopic rotating pipe drives the drill rod to rotate synchronously. When the drill bit drills into the crack, the drill rod can swing along the inclination angle of the crack due to the fact that the end of the drill rod is rotationally connected with the telescopic rotating pipe, in addition, the drill rod and the telescopic rotating pipe can synchronously rotate due to the universal rotating driving piece, and then the drill bit can drill holes along the trend of the crack. On the one hand, the extrusion force of the crack wall on the drill rod and the drill bit in the drilling process of the drill bit is reduced, the drill bit and the drill rod are prevented from being broken due to stress concentration, and on the other hand, due to the fact that the drill hole is along the crack, a new crack is basically not generated due to deviation from the crack, and the leakage plugging effect is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling holes in building construction, and more specifically, to a drilling device for underground continuous wall construction. Background Art

[0002] The underground continuous wall is a basic engineering structure, mainly used in the fields of construction engineering and municipal engineering. Its construction method involves using trenching machinery to dig a long and narrow deep trench below the ground along the peripheral axis of the project. Under the condition of mud wall protection, after the trench is cleared, a steel cage will be suspended in the trench, and then underwater concrete will be poured using the conduit method to build a continuous reinforced concrete wall section by section. This kind of wall is mainly used as a water interception, anti-seepage, load-bearing and water-retaining structure. The joint form and construction quality of the underground continuous wall in deep foundation pit construction are the main factors affecting the overall waterproof performance of the enclosure structure. The underground continuous wall is an underground hidden project. Due to the construction process, the joint position of its trench section is the part that is most prone to leakage. There are many factors affecting the quality of the joints, and the construction quality is difficult to control. If the leakage water is not handled properly, the loss of sediment behind the underground continuous wall will cause the foundation pit to become unstable and endanger the safety of the foundation pit.

[0003] A search of Chinese utility model patent publication number CN216767261U discloses a low-disturbance underground continuous wall drilling and plugging device. In this technical solution, a drill bit is used to drill holes on the surface of the underground continuous wall to release water in the cracks at the leakage location, and concrete mortar is used to grout and seal the drilled holes to achieve the plugging construction of the underground continuous wall.

[0004] However, in the above-mentioned prior art, the drill bit is drilled straight into the underground continuous wall. If the cracks are inclined along the direction of the cracks from the outside to the inside of the underground continuous wall, if the straight-line drilling is performed, on the one hand, the crack wall will generate stress on the drill bit, causing the drill bit to be subjected to a radial squeezing force along the drill bit during drilling, which may easily cause the drill bit to bend and break. On the other hand, as the straight-line drilling proceeds, the drill hole will deviate more and more from the position of the crack, which may cause new cracks to be generated at other positions of the underground continuous wall due to the drilling force during drilling, thereby causing the cracks to spread and expand the leakage area.

[0005] Therefore, in order to solve the above problems, a drilling device for underground continuous wall construction is now proposed. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a drilling device for underground continuous wall construction. The technical problem to be solved by the present invention is that the current drilling equipment used for underground continuous wall plugging construction can only drill holes in a straight line, cannot adapt to the direction of cracks, is prone to generate new cracks and may cause stress concentration and breakage of the drill bit.

[0007] To achieve the above object, the present invention provides the following technical solution: a drilling device for underground continuous wall construction, comprising a frame, and further comprising:

[0008] A top plate fixedly connected to the upper end of the frame, wherein a fixed rotating tube is vertically rotatably connected to the top plate;

[0009] A telescopic rotating tube that is telescopically inserted into the fixed rotating tube, wherein the telescopic rotating tube and the fixed rotating tube form a key connection;

[0010] A drill rod connected to the lower end of the telescopic rotating tube is rotatably mounted, a drill bit is mounted on the lower end of the drill rod, and the drill rod and the telescopic rotating tube are connected via a universal rotating drive member, so that the telescopic rotating tube drives the drill rod to rotate synchronously.

[0011] Through the above technical solution, when the drill bit drills into the crack, the end of the drill rod is rotatably connected to the telescopic rotating tube, so that the drill rod can swing along the inclination angle of the crack. In addition, the universal rotating drive allows the drill rod and the telescopic rotating tube to rotate synchronously, so that the drill bit can drill along the direction of the crack. On the one hand, the squeezing force of the crack wall on the drill rod and the drill bit during the drilling process is reduced, and the drill bit and the drill rod are prevented from being broken due to stress concentration. On the other hand, since the drilling is along the direction of the crack, new cracks will basically not be generated due to deviation from the crack, thereby affecting the leakage plugging effect.

[0012] Furthermore, a motor is vertically installed at the bottom of the top plate, the output shaft of the motor penetrates the top plate and is fixedly sleeved with a driving pulley, the upper end of the fixed rotating tube is fixedly sleeved with a driven pulley, and the driving pulley and the driven pulley are connected by a V-belt transmission.

[0013] Through the above technical solution, the output shaft of the motor drives the active pulley to rotate, and the active pulley then drives the driven pulley to rotate, thereby driving the fixed rotating tube to rotate. Since the telescopic rotating tube and the fixed rotating tube are key-connected, they can synchronously drive the telescopic rotating tube to rotate and drive the drill rod to rotate.

[0014] Furthermore, a bracket is fixedly connected to the frame, a cylinder mounting plate is fixedly connected to the upper surface of the bracket, a drilling drive cylinder is vertically mounted on the top of the cylinder mounting plate, a lifting plate is fixedly connected to the end of the cylinder rod of the drilling drive cylinder, the lifting plate is rotatably sleeved on the periphery of the telescopic rotating tube at one end away from the drilling drive cylinder, and the drilling drive cylinder is used to drive the telescopic rotating tube to telescope and slide inside the fixed rotating tube.

[0015] Through the above technical solution, the cylinder rod of the drilling drive cylinder is extended and retracted, thereby driving the lifting plate to move vertically, so that the drill bit can drill holes at the leakage position of the underground continuous wall.

[0016] Furthermore, a support sleeve is fixedly connected to the bracket, and the fixed rotating tube is inserted into the support sleeve and rotates freely in the support sleeve.

[0017] Through the above technical solution, the fixed rotating tube is supported by the support sleeve, thereby reducing the tilting phenomenon of the fixed rotating tube during the drilling process.

[0018] Furthermore, the universal rotating drive component includes a floating block which is snap-fitted and installed in the telescopic rotating tube, the floating block forms a key connection with the inner wall of the telescopic rotating tube, a cross universal shaft is fixedly connected to the downward side of the telescopic rotating tube, a rotating ball is fixedly connected to the end of the cross universal shaft away from the floating block, the upper end of the drill rod is fixedly connected to the outer wall of the rotating ball, and a slot for embedding the rotating ball is provided at the lower end of the telescopic rotating tube, and the rotating ball rotates freely in the slot.

[0019] Through the above technical solution, when the drill rod moves along the direction of the crack, the drill rod will rotate with the rotating ball as the fulcrum, and cause the cross universal joint to swing accordingly, thereby driving the floating block to move up and down in the telescopic rotating tube, so that the drill rod can swing relative to the telescopic rotating tube, so that the drill bit and drill rod can adapt to the direction of the crack.

[0020] Furthermore, a hydraulic damper is installed on the top of the telescopic rotating tube, and the telescopic end of the hydraulic damper penetrates into the telescopic rotating tube and is fixedly connected to the floating block.

[0021] Through the above technical solution, the hydraulic damper can generate a damping force on the movement of the floating block, thereby preventing the drill rod from swinging on its own.

[0022] Furthermore, the diameter of the drill bit decreases from top to bottom, and the outer diameter of the drill rod is smaller than the maximum diameter of the drill bit.

[0023] Through the above technical solution, when the drill bit is drilling an inclined hole, the contact area between the outer wall of the drill rod and the crack wall is smaller, so that the drill rod will not be resisted by the crack wall during the drilling process. In addition, it also prevents the crack wall from exerting a large lateral squeezing force on the drill rod, thereby increasing the resistance when the drill bit is feeding, causing the drilling angle of the drill rod to increase when the telescopic rotating tube moves downward, and thus cannot match the direction of the crack.

[0024] Furthermore, a plurality of receiving grooves are provided at the periphery of the drill rod, and the inner walls of the receiving grooves are rotatably connected to a plurality of groups of rotating parts by installing pivots, and each group of the rotating parts has two rotating parts distributed at both ends of the drill rod, and a hinge rod is fixedly connected to the periphery of the rotating part, and one end of two hinge rods in each group passing through the receiving grooves is hingedly connected to an arc-shaped guard plate, and the drill bit and the drill rod are connected by a floating member, and the floating member is used to drive the hinge rod to swing when the drill bit moves axially along the drill rod, so that the arc-shaped guard plates can be expanded or retracted with each other.

[0025] Through the above technical solution, when drilling, the floating part drives the rotating part to rotate, and makes the inner arc surface of the arc-shaped guard plate embrace the drill rod. After the drilling is completed, when the drill bit is retracted from the drill hole, the floating part drives the arc-shaped guard plate away from the drill rod and contacts the wall of the drill hole, so that the end with the largest diameter of the drill bit will not generate an extrusion force with the wall of the drill hole when retracting, so that the retraction process of the drill bit is smoother.

[0026] Furthermore, the floating member includes a connecting rod coaxially fixed to the upper end of the drill bit, the connecting rod penetrates into the drill rod and is fixed with a block, a sliding cavity for the block to engage with is provided in the drill rod, the block slides freely along the axial direction of the drill rod in the sliding cavity, a driving rod is fixed to the upper surface of the block, the driving rod penetrates into the drill rod at one end away from the block, and a plurality of rack segments are provided at the periphery of the driving rod, a gear segment is provided at the periphery of the rotating part, and the gear segment and the rack segment are externally meshed.

[0027] Through the above technical scheme, when the drill bit is drilling a hole, the drill bit is subjected to resistance from the underground continuous wall, thereby causing the drill bit to move toward the direction of the drill rod, causing the driving rod to move toward the upper end of the drill rod, and causing the gear segment and the rack segment to mesh and rotate, thereby driving the rotating part to rotate, causing the hinge rod to drive the arc-shaped guard plate to swing toward the inner side of the drill rod and hold the drill rod. When the drill bit is retracted, the resistance encountered by the drill bit disappears, the driving rod will move in the opposite direction, causing the arc-shaped guard plate to move in the opposite direction, and the outer arc surface of the arc-shaped guard plate contacts the wall of the drill hole, thereby protecting the drill bit.

[0028] Furthermore, a return spring is installed in the sliding cavity, the return spring is wrapped around the periphery of the driving rod, and the two ends of the return spring in the elastic force direction elastically press against the block and the top wall of the sliding cavity respectively.

[0029] Through the above technical solution, the reset spring generates an elastic resisting force on the block, so that when the drill bit is retracted, the reset spring can quickly drive the block to move in the direction of the drill bit and quickly expand the arc guard plate.

[0030] Technical effects and advantages of the present invention:

[0031] 1. In the present invention, the end of the drill rod is rotatably connected to the telescopic rotating tube, so that the drill rod can swing along the inclination angle of the crack. In addition, the universal rotating drive member allows the drill rod and the telescopic rotating tube to rotate synchronously, so that the drill bit can drill along the direction of the crack. On the one hand, the squeezing force of the crack wall on the drill rod and the drill bit during the drilling process is reduced, and the drill bit and the drill rod are prevented from being broken due to stress concentration. On the other hand, since the drilling is along the direction of the crack, new cracks will basically not be generated due to deviation from the crack, thereby affecting the leakage plugging effect;

[0032] 2. When the drill bit of the present invention is drilling an inclined hole, the contact area between the outer wall of the drill rod and the crack wall is small, so that the drill rod will not be resisted by the crack wall during the drilling process. In addition, it also prevents the crack wall from exerting a large lateral squeezing force on the drill rod, thereby increasing the resistance when the drill bit is feeding, thereby causing the drilling angle of the drill rod to increase when the telescopic rotating tube moves downward, and thus cannot match the direction of the crack;

[0033] 3. When the drill bit in the present invention drills a hole, the drill bit is subjected to resistance from the underground continuous wall, thereby causing the drill bit to move toward the direction of the drill rod, causing the driving rod to move toward the upper end of the drill rod, causing the gear segment and the rack segment to mesh and rotate, thereby driving the rotating part to rotate, causing the hinge rod to drive the arc-shaped guard plate to swing toward the inner side of the drill rod and hold the drill rod. When the drill bit is retracted, the resistance encountered by the drill bit disappears, the driving rod will move in the opposite direction, causing the arc-shaped guard plate to move in the opposite direction, and the outer arc surface of the arc-shaped guard plate will contact the wall of the drill hole, thereby protecting the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a drilling device for underground continuous wall construction in the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0036] Figure 3 for Figure 1 Schematic diagram of the positional relationship after the middle part of the structure is cut open;

[0037] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0038] Figure 5 It is a schematic diagram of the structure after the drill rod, hydraulic damper and telescopic rotating tube are assembled in the present invention;

[0039] Figure 6 for Figure 5 Schematic diagram of the explosion decomposition of the structure in the middle;

[0040] Figure 7It is a schematic diagram of the structure after the arc-shaped guard plate, drill rod, drill bit and rotating ball are assembled in the present invention;

[0041] Figure 8 for Figure 7 Schematic diagram of the positional relationship after the middle part of the structure is cut open;

[0042] Fig. 9 It is a structural schematic diagram of the drill rod in the present invention;

[0043] Fig.10 for Fig. 9 Schematic cross-sectional view of the structure.

[0044] The accompanying drawings are marked as follows: 1. fixed rotating tube; 2. motor; 3. frame; 4. cylinder mounting plate; 5. top plate; 6. drilling drive cylinder; 7. support sleeve; 8. lifting plate; 9. telescopic rotating tube; 10. drill rod; 11. arc guard plate; 12. drill bit; 13. cross universal joint; 14. hydraulic damper; 15. rotating ball; 16. slot; 17. driving rod; 18. rotating part; 19. rack segment; 20. storage slot; 21. connecting rod; 22. connecting column; 23. floating block; 24. hinge rod; 25. block; 26. reset spring; 27. sliding cavity; 28. gear segment. DETAILED DESCRIPTION

[0045] 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.

[0046] like Figure 1-Figure 10 As shown, the present embodiment discloses: a drilling device for underground continuous wall construction, including a frame 3, four legs of the frame 3 are placed at the leakage position of the underground continuous wall, a top plate 5 is welded on the upper end of the frame 3, a fixed rotating tube 1 is vertically rotatably connected to the top plate 5 by installing a bearing, a telescopic rotating tube 9 is telescopically inserted and installed at the lower end of the fixed rotating tube 1, and the telescopic rotating tube 9 is key-connected with the fixed rotating tube 1, that is, the fixed rotating tube 1 and the telescopic rotating tube 9 can rotate synchronously, and the telescopic rotating tube 9 can also rotate in the fixed rotating tube 1. The rotating tube 1 is telescopically slidable up and down inside. During installation, the telescopic rotating tube 9 is aligned with the cracks at the leakage position of the underground continuous wall as much as possible. In addition, both ends of the telescopic rotating tube 9 are closed. A motor 2 is vertically installed at the bottom of the top plate 5. The output shaft of the motor 2 penetrates the top plate 5 and is fixedly sleeved with a driving pulley. The upper end of the fixed rotating tube 1 is fixedly sleeved with a driven pulley. The driving pulley and the driven pulley are connected by a V-belt transmission. The motor 2 is started and drives the driving pulley and the driven pulley to rotate, and then the fixed rotating tube 1 is rotated on the top plate 5.

[0047] Combination Figure 3 , Figure 4 and Figure 6 As shown, a spherical slot 16 is provided at the lower end of the telescopic rotating tube 9, a rotating ball 15 is rotatably embedded in the slot 16, a drill rod 10 is welded to the spherical surface of the rotating ball 15, a convex block is welded on the part of the rotating ball 15 located inside the telescopic rotating tube 9, a cross universal shaft 13 is connected to the convex block, a floating block 23 is welded to the upper end of the cross universal shaft 13, and the floating block 23 is key-connected with the inner wall of the telescopic rotating tube 9, so that when the telescopic rotating tube 9 rotates, the floating block 23 is synchronously driven to rotate, and then the cross universal shaft 13 drives the rotating ball 15 to rotate synchronously with the telescopic rotating tube 9, so that the drill rod 10 is rotated;

[0048] Combination Figure 1 , Figure 2 and Figure 3 As shown, a bracket is fixedly connected to the frame 3, and a cylinder mounting plate 4 is fixedly connected to the upper surface of the bracket. A drilling drive cylinder 6 is vertically installed on the top of the cylinder mounting plate 4. A lifting plate 8 is fixedly connected to the end of the cylinder rod of the drilling drive cylinder 6. The end of the lifting plate 8 away from the drilling drive cylinder 6 is rotatably sleeved on the periphery of the telescopic rotating tube 9 through the mounting bearing, and the periphery of the telescopic rotating tube 9 is fixedly sleeved with two clamping end covers, which are one up and one down, and limit the inner ring of the bearing, so that the lifting plate 8 and the telescopic rotating tube 9 can be lifted and lowered synchronously. The drilling drive cylinder 6 is used to drive the telescopic rotating tube 9 to telescope and slide in the fixed rotating tube 1, and the cylinder rod of the drilling drive cylinder 6 is extended and retracted, thereby driving the telescopic rotating tube 9 to move up and down, and then driving the drilling rod 10 to move up and down accordingly. In addition, a support sleeve 7 is also fixedly connected to the bracket, and the fixed rotating tube 1 is inserted into the support sleeve 7 and rotates freely in the support sleeve 7, and the support sleeve 7 radially supports the fixed rotating tube 1;

[0049] Combination Figures 3 to 6 As shown, a hydraulic damper 14 is installed on the top of the telescopic rotating tube 9, and the telescopic end of the hydraulic damper 14 penetrates the telescopic rotating tube 9 and is fixedly connected with a connecting column 22, and the lower end of the connecting column 22 is fixedly connected with a floating block 23, so that when the floating block 23 slides in the telescopic rotating tube 9, the connecting column 22 can drive the output end of the hydraulic damper 14 to move, so that the hydraulic damper 14 can generate a damping force on the movement process of the floating block 23, thereby preventing the floating block 23 from sliding by itself in the telescopic rotating tube 9;

[0050] Combination Figures 1 to 10As shown, a connecting rod 21 is coaxially penetrated at the lower end of the drill rod 10, and the connecting rod 21 slides freely in the drill rod 10, and a drill bit 12 with a diameter decreasing from top to bottom is welded at the lower end of the connecting rod 21, and the outer diameter of the drill rod 10 is smaller than the maximum diameter of the drill bit 12, and four strip-shaped receiving grooves 20 are opened at the periphery of the drill rod 10, and the length direction of the receiving groove 20 is parallel to the axial direction of the drill rod 10, and the four receiving grooves 20 are arranged in an axial array along the drill rod 10, and the inner wall of the receiving groove 20 is rotatably connected with four groups of rotating parts 18 by installing pivots, and each group of rotating parts 18 has two and is distributed at both ends of the drill rod 10, and the periphery of the rotating part 18 is fixedly connected with a hinge rod 24, and one end of the two hinge rods 24 in each group passing through the receiving groove 20 is hingedly connected with an arc-shaped guard plate 11, and the inner arc surface of the arc-shaped guard plate 11 faces the drill rod 10;

[0051] Combination Figures 1 to 10 As shown, the connecting rod 21 penetrates into the drill rod 10 and is fixedly connected with a block 25. A sliding cavity 27 for the block 25 to engage is provided in the drill rod 10. The block 25 slides freely along the axial direction of the drill rod 10 in the sliding cavity 27. A driving rod 17 is fixedly connected to the upper surface of the block 25. The end of the driving rod 17 away from the block 25 penetrates into the drill rod 10, and four rack segments 19 are provided on the periphery of the driving rod 17. A gear segment 28 is provided on the periphery of the rotating portion 18. The gear segment 28 and the rack segment 19 are externally meshed. A reset spring 26 is installed in the sliding cavity 27. The reset spring 26 is sleeved around the periphery of the driving rod 17, and the two ends of the reset spring 26 in the elastic force direction elastically press against the block 25 and the top wall of the sliding cavity 27 respectively.

[0052] Working principle of the present invention:

[0053] Find out the leakage position of the underground continuous wall and place the rack 3: Use visual inspection or existing tools to detect the leakage position of the underground continuous wall and mark it. Of course, the area with larger cracks can be selected as the main crack for marking the leakage position, and then the rack 3 is placed at the marked position;

[0054] Drilling: Start the motor 2, the output shaft of the motor 2 drives the driving pulley to rotate, and the driving pulley then drives the driven pulley to rotate, thereby driving the fixed rotating tube 1 to rotate. Since the telescopic rotating tube 9 and the fixed rotating tube 1 are connected by a key, the telescopic rotating tube 9 can be synchronously driven to rotate. In addition, since the floating block 23 and the inner wall of the telescopic rotating tube 9 are connected by a key, when the telescopic rotating tube 9 rotates, the floating block 23 rotates synchronously, and the floating block 23 drives the cross universal shaft 13 to rotate, and then drives the rotating ball 15 and the telescopic rotating tube 9 to rotate synchronously, and then drives the drill rod 10 to rotate. In addition, the clamping block 25 is clamped in the sliding cavity 27, and the two are connected in a form-locking manner, so that when the drill rod 10 rotates, the drill bit 12 is synchronously driven to rotate;

[0055] Since the hydraulic damper 14 has a damping force on the connecting column 22 and the floating block 23, the drill bit 12 will basically not swing by itself during the drilling process. That is, if the crack is in a vertical direction, the drill bit 12 will be able to drill in a straight line. The damping force of the hydraulic damper 14 on the floating block 23 will prevent the drill bit 12 from swinging, and thus the hole drilled by the drill bit 12 is a straight hole (that is, a hole coaxial with the telescopic rotating tube 9);

[0056] If the crack in the underground continuous wall is inclined, the drill bit 12 is squeezed by the inner wall of the crack, which will drive the drill rod 10 to swing, that is, the drill rod 10 will swing slightly with the rotating ball 15 as the fulcrum, and the rotating ball 15 will drive the cross universal shaft 13 to swing. The cross universal shaft 13, the rotating ball 15 and the floating block 23 constitute a crank slider mechanism. Therefore, the swing of the cross universal shaft 13 will drive the floating block 23 to slide downward in the telescopic rotating tube 9, and then the connecting column 22 will pull the output end of the hydraulic damper 14 to extend downward. The hydraulic damper 14 will generate a damping force on the floating block 23 to prevent the telescopic rotating tube 9 from exerting a lateral force on the drill rod 10 when it moves downward, causing the drill rod 10 to swing greatly, so that the drill bit 12 can drill along the crack direction;

[0057] In addition, during the drilling process, the drill bit 12 is subjected to resistance from the underground continuous wall, so that the drill bit 12 moves toward the drill rod 10, so that the driving rod 17 moves toward the upper end of the drill rod 10, and the gear segment 28 and the rack segment 19 mesh and rotate, thereby driving the rotating part 18 to rotate, so that the hinge rod 24 drives the arc-shaped guard plate 11 to swing toward the inner side of the drill rod 10 and hold the drill rod 10. After holding the drill rod 10, the outer diameter of the columnar structure surrounded by the arc-shaped guard plate 11 is smaller than the maximum diameter of the drill bit 12;

[0058] Drill withdrawal: After the drilling reaches a predetermined depth (which will be determined by those skilled in the art according to actual conditions and will not be specifically limited here), the cylinder rod of the drilling drive cylinder 6 is shortened, and the telescopic rotating tube 9 is driven to move upward, the resistance of the drill bit 12 disappears, the driving rod 17 moves in the opposite direction, and the arc-shaped guard plate 11 moves in the opposite direction, and the outer arc surface of the arc-shaped guard plate 11 contacts the wall of the drill hole, thereby protecting the drill bit 12;

[0059] Grouting: After the drilling is completed, the frame 3 is removed, and then the concrete mortar is poured into the drilled hole using a grouting tool, and the concrete mortar is allowed to spread to all parts of the cracks so that the cracks can be sealed, thereby completing the plugging construction.

[0060] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0061] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0062] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling device for underground continuous wall construction, comprising a frame (3), characterized in that: Also includes: A top plate (5) fixedly connected to the upper end of the frame (3), wherein a fixed rotating tube (1) is vertically rotatably connected to the top plate (5); a telescopic rotating tube (9) which is telescopically inserted into the fixed rotating tube (1), wherein the telescopic rotating tube (9) and the fixed rotating tube (1) form a key connection; A drill rod (10) is rotatably connected to the lower end of the telescopic rotating tube (9), a drill bit (12) is installed at the lower end of the drill rod (10), and the drill rod (10) and the telescopic rotating tube (9) are connected via a universal rotating drive member, so that the telescopic rotating tube (9) drives the drill rod (10) to rotate synchronously.

2. The drilling equipment for underground continuous wall construction according to claim 1, characterized in that: A motor (2) is vertically mounted at the bottom of the top plate (5); an output shaft of the motor (2) penetrates the top plate (5) and is fixedly sleeved with a driving pulley; a driven pulley is fixedly sleeved on the upper end of the fixed rotating tube (1); the driving pulley and the driven pulley are connected via a V-belt transmission.

3. The drilling equipment for underground continuous wall construction according to claim 1, characterized in that: A bracket is fixedly connected to the frame (3), a cylinder mounting plate (4) is fixedly connected to the upper surface of the bracket, a drilling drive cylinder (6) is vertically mounted on the top of the cylinder mounting plate (4), a lifting plate (8) is fixedly connected to the end of the cylinder rod of the drilling drive cylinder (6), and the lifting plate (8) is rotatably sleeved on the periphery of the telescopic rotating tube (9) at one end away from the drilling drive cylinder (6), and the drilling drive cylinder (6) is used to drive the telescopic rotating tube (9) to telescope and slide inside the fixed rotating tube (1).

4. The drilling equipment for underground continuous wall construction according to claim 3, characterized in that: A support sleeve (7) is fixedly connected to the bracket, and the fixed rotating tube (1) is inserted into the support sleeve (7) and rotates freely in the support sleeve (7).

5. The drilling equipment for underground continuous wall construction according to claim 1, characterized in that: The universal rotating drive member comprises a floating block (23) which is mounted in the telescopic rotating tube (9), the floating block (23) being key-connected with the inner wall of the telescopic rotating tube (9), a cross universal shaft (13) being fixedly connected to the downward side of the telescopic rotating tube (9), a rotating ball (15) being fixedly connected to the end of the cross universal shaft (13) away from the floating block (23), the upper end of the drill rod (10) being fixedly connected to the outer wall of the rotating ball (15), a slot (16) for the rotating ball (15) to be embedded is provided at the lower end of the telescopic rotating tube (9), and the rotating ball (15) is freely rotated in the slot (16).

6. The drilling equipment for underground continuous wall construction according to claim 5, characterized in that: A hydraulic damper (14) is installed on the top of the telescopic rotating tube (9), and the telescopic end of the hydraulic damper (14) penetrates into the telescopic rotating tube (9) and is fixedly connected to the floating block (23).

7. The drilling equipment for underground continuous wall construction according to claim 1, characterized in that: The diameter of the drill bit (12) decreases from top to bottom, and the outer diameter of the drill rod (10) is smaller than the maximum diameter of the drill bit (12).

8. The drilling equipment for underground continuous wall construction according to claim 7, characterized in that: The drill rod (10) is provided with a plurality of receiving grooves (20) on its periphery, and the inner wall of the receiving grooves (20) is connected to a plurality of groups of rotating parts (18) by installing pivots for rotation, and each group of the rotating parts (18) has two rotating parts (18) distributed at both ends of the drill rod (10), and a hinge rod (24) is fixedly connected to the periphery of the rotating part (18), and one end of the two hinge rods (24) in each group that pass through the receiving grooves (20) is hingedly connected to a curved guard plate (11), and the drill bit (12) and the drill rod (10) are connected by a floating member, and the floating member is used to drive the hinge rod (24) to swing when the drill bit (12) moves axially along the drill rod (10), so that the curved guard plates (11) are mutually expanded or retracted.

9. The drilling equipment for underground continuous wall construction according to claim 8, characterized in that: The floating member comprises a connecting rod (21) coaxially fixed to the upper end of the drill bit (12); the connecting rod (21) penetrates into the drill rod (10) and is fixedly connected to a block (25); a sliding cavity (27) for the block (25) to engage is provided in the drill rod (10); the block (25) slides freely in the sliding cavity (27) along the axial direction of the drill rod (10); a driving rod (17) is fixedly connected to the upper surface of the block (25); one end of the driving rod (17) away from the block (25) penetrates into the drill rod (10); a plurality of rack segments (19) are provided on the periphery of the driving rod (17); a gear segment (28) is provided on the periphery of the rotating portion (18); the gear segment (28) and the rack segment (19) are in external meshing.

10. The drilling equipment for underground continuous wall construction according to claim 9, characterized in that: A return spring (26) is installed in the sliding cavity (27). The return spring (26) is wrapped around the periphery of the driving rod (17), and the two ends of the return spring (26) in the elastic force direction elastically press against the block (25) and the top wall of the sliding cavity (27) respectively.

Images