Pile driver with less wear on drill rod and pile driving method

Abstract

The present application relates to a pile driver and a pile driving method with less wear on drill rods, and relates to the technical field of building construction, and comprises a main frame, a winch is arranged on one side surface of the main frame, a steel cable is wound on the drum of the winch, a top frame is welded on the top of the drill rod bracket, one end of the steel cable extends upward through a pulley and is connected to a drive box through a lifting ring, a motor frame is arranged in the middle of the drive box, a drive motor is connected to the center of the motor frame through bolts, the bottom drive of the drive motor is connected to a reducer, and the bottom output end of the reducer is connected to a buffer mechanism through the drive box, and the buffer mechanism comprises a connecting tube, a rebound tube, a coupling joint, a strip groove, a slider, a damping rod, a support spring and an auxiliary spring; the present application significantly reduces the wear of the drill rod during the construction process by using a high-strength, wear-resistant alloy material to make the drill rod, performing special treatment, and arranging a buffer mechanism and a guide mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a pile driver and a pile driving method with low drill rod wear. Background Art

[0002] At present, there are two types of pile driving machines used on construction sites: one is a rotary pile driver, which uses a drill rod suspension frame pulled up by a winch to drill holes through the drill rod; the other is an impact hammer pile driver, which uses a winch to pull up an impact hammer and repeatedly drop it to achieve pile driving; In the prior art, the related technology of the tab stamping die can refer to the Chinese patent with announcement number CN110656887A, which discloses a convenient pile driver drill rod device, including a guide frame, a movable slider, a distance fine-tuning shaft, a shock absorber, a drill rod, a positioning ring, a rotating shaft, a cover, a water inlet pipe, and a rotating water spray port. A movable slider is arranged on the inner side of the guide frame, a laser receiver is installed on the side of the movable slider, a distance fine-tuning shaft is connected to the side of the movable slider, a laser transmitter is arranged on the side of the shock absorber, a hydraulic telescopic rod is connected to the bottom of the shock absorber, a drill rod is connected to the bottom of the hydraulic motor, a positioning ring is sleeved on the upper part of the drill rod, a rotating shaft is connected to the lower part of the drill rod, a cover is arranged on the lower part of the rotating shaft, a water inlet pipe is installed on the side of the guide frame, and a rotating water spray port is connected to the bottom of the guide frame. A convenient pile driver drill rod device of the present invention is a device that can accurately locate the pile driving position through a laser locator, and at the same time, a suitable borehole is drilled on the ground before pile driving, so as to facilitate workers to install piles, thereby achieving the purpose of improving the pile driving quality and improving the work efficiency of workers. The inventor discovered the following problems in the prior art during the implementation of this application: During the use of traditional pile drivers, the drill rods are often severely worn due to strong impact and friction, which not only affects the service life of the pile drivers, but also increases the construction cost. Although the existing pile drivers have improved the structure and materials of the drill rods to a certain extent, the problem of drill rod wear has not been fundamentally solved under long-term and high-intensity construction environments. During construction, the drill rods often do not have a buffer mechanism. At the same time, when replacing drill rods of different specifications for construction, the guide device often cannot closely guide the drill rod, which can easily increase the degree of wear of the drill rod. Summary of the invention

[0003] The purpose of the present application is to provide a pile driver and a pile driving method with less wear on the drill rod.

[0004] In the first aspect, the pile driver and pile driving method provided by the present application with low drill rod wear adopt the following technical solutions: A pile driver and a pile driving method with less wear on drill rods, comprising a main frame, a drill rod support connected to one side edge of the main frame through a movable joint, a middle outer wall of one side of the drill rod support and the main frame connected through a hydraulic telescopic rod, and both ends of the hydraulic telescopic rod are connected to the drill rod support and the main frame through a movable shaft, a winch is arranged on one side surface of the main frame, a steel cable is wound around the drum of the winch, a top frame is welded on the top of the drill rod support, pulleys are arranged on the top of the top frame, and one end of the steel cable away from the winch extends upward through the pulley and is connected to the main frame through a lifting ring A drive box is provided, a limit groove is provided on the surface of one side of the drill rod support away from the main frame, a guide rod is connected to the middle inner wall of the limit groove, a tube is arranged and connected to the outer wall of one side of the drive box, and the tube is sleeved on the outer wall of the guide rod, a motor frame is provided in the middle of the drive box, a drive motor is connected to the center of the motor frame by bolts, a reducer is connected to the bottom drive of the drive motor, and a buffer mechanism is connected to the bottom output end of the reducer through the drive box, and the buffer mechanism includes a connecting tube, a rebound tube, a coupling joint, a strip groove, a slider, a damping rod, a support spring and an auxiliary spring.

[0005] By adopting the above technical scheme, the main frame plays a supporting role, and the drill rod bracket is pushed and adjusted by the hydraulic telescopic rod to facilitate the storage of the drill rod bracket when the pile driver is not in use. The steel cable is reeled in by the winch to achieve the adjustment of different heights of the drive box. The tube sleeve is arranged on the outer wall of the guide rod to play a limiting role and cooperate with the guide mechanism to guide the drill rod. When piling is carried out, the connecting tube can be driven to rotate by the driving motor and the reducer. The rotation of the connecting tube drives the rebound tube to rotate, thereby driving the drill rod to rotate synchronously. The rotation of the drill rod drives the spiral drill bit to rotate synchronously to carry out piling drilling. The drill rod weight can be buffered by the buffer mechanism during the piling process.

[0006] A rebound cylinder is embedded in the inner wall of the bottom end of the connecting cylinder, and a coupling joint is provided at the opposite end of the connecting cylinder and the rebound cylinder. The bottom output end of the reducer is connected to the connecting cylinder through a coupling joint, and strip grooves are provided on both sides of the inner walls of the connecting cylinder. Slide blocks are connected to the outer walls on both sides of the middle part of the rebound cylinder, and the slide blocks are embedded in the strip grooves.

[0007] By adopting the above technical solution, the connecting cylinder plays a connecting role and can be connected to the driving shaft of the reducer. The rebound cylinder can be translated in the connecting cylinder through the guidance of the slider. At the same time, the slider and the strip groove play a limiting role so that the connecting cylinder and the rebound cylinder can rotate synchronously, thereby driving the drill rod to perform drilling movement.

[0008] The inner wall of the connecting cylinder is arranged and connected with a damping rod, and a supporting spring is arranged in the middle of multiple groups of the damping rods. One end of the damping rod and the supporting spring are connected to the rebound cylinder, and one end of the sliding block is connected to an auxiliary spring, and the auxiliary spring is also embedded in the strip groove. The end of the rebound cylinder away from the connecting cylinder is connected to the drill rod through a coupling joint, and an auxiliary limiting mechanism is arranged at the bottom of the driving box, and the auxiliary limiting mechanism includes a No. 2 tube, a connecting rod, an adjusting ring and a limiting ring. The No. 2 tube is arranged at the bottom of the tube, and the No. 2 tube is sleeved on the outer wall of the guide rod. A connecting rod is arranged on one side of the No. 2 tube, and an adjusting ring is connected to the outer wall of the middle part of the connecting tube, and the end of the connecting rod away from the No. 2 tube is connected to the limiting ring, and the limiting ring is sleeved on the outer wall of the adjusting ring and the adjusting ring and the limiting ring are connected by a bearing.

[0009] By adopting the above technical scheme, the drill rod is made of a high-strength, wear-resistant alloy material and is specially treated. When the drill rod encounters harder geology during drilling, it will be impacted upward. The drill rod is pushed upward by the impact, thereby pushing the rebound tube to move upward in the direction of the connecting tube. During the upward translation of the rebound tube, the support spring and the auxiliary spring are compressed and contracted, thereby absorbing the upward impact force and thus playing a role of buffering. After the support spring and the auxiliary spring buffer, the impact caused by the rebound of the support spring and the auxiliary spring is offset by the damping property of the damping rod, thereby achieving a buffering effect on the drill rod. At the same time, the buffering mechanism can be assisted by the auxiliary limiting mechanism to limit the buffer mechanism, so that the drill rod can always remain stable during the drilling process. The rotation of the connecting tube will drive the adjusting ring to rotate synchronously. The connecting tube and the adjusting ring can be limited by the limiting ring to avoid tilting of the connecting tube and the drill rod.

[0010] The inner cavity of the connecting cylinder is provided with an adjusting plate, and the damping rod and the support spring are connected to the adjusting plate at one end away from the rebound cylinder, and the connecting cylinder is provided with through grooves on both sides adjacent to the strip groove, and the two ends of the adjusting plate are connected with moving blocks, and the ends of the two groups of moving blocks pass through the through grooves and extend to the outside of the connecting cylinder, and adjusting cylinders are embedded on both sides of the limiting ring, and the adjusting cylinder and the adjusting ring are connected by a bearing, and a threaded adjusting rod is threadedly connected to the inner wall of one end of the adjusting cylinder, and the ends of the two groups of threaded adjusting rods are respectively connected to the moving blocks on both sides, and adjusting twist blocks are provided at both ends of the adjusting ring away from the adjusting cylinder, and the adjustment output ends of the two groups of adjusting twist blocks are connected to the adjusting cylinder.

[0011] By adopting the above technical scheme, the adjusting ring can adjust the buffering rebound force of the connecting tube by twisting the adjusting block while limiting the connection of the connecting tube, so as to improve the buffering effect on the drill rod. During adjustment, the adjusting tube can be driven to rotate by twisting the adjusting block, and the rotation of the adjusting tube drives the threaded adjusting rod to move up and down. The lifting and lowering of the threaded adjusting rod drives the moving block to move in translation, thereby driving the adjusting plate to be adjusted synchronously. The support spring is squeezed or relaxed by the movement of the adjusting plate, thereby changing the elastic force of the support spring, thereby adjusting the buffering force of the buffer mechanism so as to achieve a good buffering effect when facing drill rods of different specifications.

[0012] A guide mechanism is arranged on one side of the bottom of the drill rod support, and the guide mechanism includes a limit frame, a guide cylinder, a movable groove and an arc-shaped push plate. The limit frame is connected to the drill rod support by bolts, and a guide cylinder is connected through the middle of the limit frame. The inner wall of the guide cylinder is surrounded by movable grooves, and the inner wall of the movable groove is embedded with an arc-shaped push plate.

[0013] By adopting the above technical solution, the guide mechanism is used to ensure that the drill rod maintains linear motion during drilling, reducing wear caused by bending. The drill rod passes through the guide cylinder and abuts against the arc-shaped push plate, thereby guiding and limiting the drill rod.

[0014] The centers of the inner walls of the multiple groups of movable grooves are connected with threaded cylinders through bearings, the ends of the threaded cylinders away from the inner wall of the movable groove are threadedly connected with a screw, the ends of the screws away from the threaded cylinders are connected to an arc-shaped push plate, the inner walls on both sides of the movable groove are provided with limiting holes, the outer walls on both sides of the arc-shaped push plate are connected with limiting rods, the limiting rods are embedded in the limiting holes, the drill rod is penetrated and arranged in the interior of the guide cylinder, the outer wall of the side of the arc-shaped push plate away from the movable groove is arranged with an extrusion spring, the side of the extrusion spring away from the arc-shaped push plate is connected with a buffer plate, and the surface of one end of the buffer plate away from the arc-shaped push plate is arranged with balls.

[0015] By adopting the above technical solution, the threaded barrel can rotate in the movable groove, and the rotation of the threaded barrel drives the screw to perform telescopic movement, thereby pushing the arc-shaped push plate to extend or retract, so that drill rods of different specifications can be guided. The guided drill rod can be buffered to a certain extent by the extrusion spring and the buffer plate to prevent the drill rod from being damaged during the guiding process of the guide mechanism after the drill rod is tilted during the drilling process. At the same time, the ball bearing can make it a sliding connection with the drill rod to avoid large wear between the drill rod and the buffer plate during the contact process.

[0016] One end of the multiple groups of threaded barrels away from the screw rod passes through the guide barrel and is connected to a linkage gear. A rotating ring is sleeved on the outer wall of one side of the guide barrel. The rotating ring and the guide barrel are movably connected through a bearing. The top outer wall of the rotating ring is connected to a crown gear. The crown gear is meshed with the linkage gear. A driven gear is sleeved on the outer wall of the rotating ring. The rotation of the driven gear drives the rotating ring to rotate synchronously. The rotation of the crown gear drives the multiple groups of linkage gears to rotate, thereby driving the threaded barrel to rotate synchronously.

[0017] By adopting the above technical solution, the rotating ring can rotate on the outer wall of the guide cylinder. The rotation of the rotating ring drives the crown gear to rotate synchronously. The rotation of the crown gear drives multiple sets of linkage gears to rotate, thereby driving the threaded cylinder to rotate and drive the arc push plate.

[0018] A servo motor is arranged on one side of the bottom of the limit frame, and the output end of the servo motor passes through the limit frame and is connected to a driving shaft, the driving shaft and the limit frame are connected through a bearing, a driving gear is connected to the middle outer wall key of the driving shaft, the driving gear is meshed with a driven gear, the servo motor drives the driving shaft to rotate, the rotation of the driving shaft drives the driving gear to rotate synchronously, and the rotation of the driving gear drives the driven gear to rotate synchronously.

[0019] By adopting the above technical scheme, when guiding and positioning drill rods of different widths and specifications, the controller can be used to control the servo motor to drive the driving shaft to rotate, the driving shaft rotation drives the driving gear to rotate synchronously, the driving gear rotation drives the driven gear to rotate synchronously, the driven gear rotation drives the rotating ring and the crown gear to rotate synchronously, the crown gear rotation drives multiple sets of linkage gears to rotate, thereby driving the threaded barrel to rotate, the threaded barrel rotation drives the screw to telescope, thereby pushing the arc push plate to extend or retract, so that drill rods of different specifications can be guided, and at the same time, a brake mechanism is arranged inside the servo motor to maintain the current torque in the event of a power outage.

[0020] Pressure sensors are embedded in the outer walls of the ends of the multiple groups of buffer plates away from the movable grooves, a controller is arranged on one side of the limit frame, a communication unit is arranged on one side of the controller, the controller and the pressure sensor, the servo motor and the communication unit are all connected by wires, the bottom end of the drill rod is connected to a spiral drill bit through a guide cylinder, and hydraulic support columns are arranged at the edges of the main frame.

[0021] By adopting the above technical solution, the pressure between the buffer plate and the drill rod can be detected in real time through the pressure sensor to facilitate guiding. When the drill rod is tilted during drilling, the pressure between the drill rod and the buffer plate on one side of the tilting direction increases. When the pressure sensor detects that the pressure exceeds the set safety value, the signal can be transmitted to the staff through the communication unit for timely correction. The spiral drill bit is a detachable structure and can be replaced when it is severely worn. The pile driver can be supported and fixed by the hydraulic support column to keep it stable.

[0022] The piling method comprises the following steps: Step 1: First, make construction preparations, ensure that the construction site is flat, solid, and free of obstacles, and set up obvious warning signs. Non-construction personnel are not allowed to enter. Check whether all parts of the pile driver are intact, whether the hydraulic system and electrical system are normal, connect the drill rod and the rebound cylinder through the coupling joint, ensure that the drill rod and the guide mechanism are closely matched, start the pile driver, conduct a no-load test run, and check whether all parts are operating normally; Step 2: According to geological data and construction requirements, select appropriate drilling parameters, such as drilling speed, impact force, etc., and use the drive motor and reducer to drive the connecting tube to rotate. The rotation of the connecting tube drives the rebound tube to rotate, thereby driving the drill rod to rotate synchronously. The rotation of the drill rod drives the spiral drill bit to rotate synchronously to perform piling drilling. During the drilling process, observe the contact between the drill rod and the ground at any time. If any abnormality is found, stop drilling immediately and check the cause; Step 3: When the drill rod encounters a harder geology during drilling, it will be impacted upward. The drill rod is pushed upward by the impact, thereby pushing the rebound cylinder to move upward toward the connecting cylinder. During the upward translation of the rebound cylinder, the support spring and the auxiliary spring are compressed and contracted, thereby absorbing the upward impact force and thus playing a buffering role. After the support spring and the auxiliary spring buffer, the rebound cylinder and the drill rod are pushed to rebound. Due to the damping property of the damping rod, the impact caused by the rebound of the support spring and the auxiliary spring is offset, thereby achieving a buffering effect on the drill rod; Step 4: Ensure that the drill rod maintains linear motion during drilling through the guide mechanism to reduce wear caused by bending. At the same time, when guiding and positioning drill rods of different widths and specifications, the controller can be used to control the servo motor to drive the drive shaft to rotate. The rotation of the drive shaft drives the driving gear to rotate synchronously. The rotation of the driving gear drives the driven gear to rotate synchronously. The rotation of the driven gear drives the rotating ring and the crown gear to rotate synchronously. The rotation of the crown gear drives multiple sets of linkage gears to rotate, thereby driving the threaded barrel to rotate. The rotation of the threaded barrel drives the screw to telescope, thereby pushing the arc-shaped push plate to extend or retract, so that drill rods of different specifications can be guided. The pressure sensor detects that the buffer plate is in contact with the outer wall of the drill rod and transmits a signal to the controller. The controller controls the servo motor to stop driving, thereby guiding and positioning drill rods of different specifications, thereby avoiding increased wear caused by tilting. Step 5: After drilling to a certain depth, stop drilling, lift the drill rod out of the ground, and check the wear of the drill rod. If the drill rod is found to be severely worn, it should be replaced with a new one in time. The drill rod should be maintained regularly, such as cleaning and oiling, to extend the service life of the drill rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The drill rod is made of high-strength, wear-resistant alloy material and is specially treated. When the drill rod encounters hard geology during drilling, it will be impacted upward. The drill rod is pushed upward by the impact, thereby pushing the rebound tube to move upward toward the connecting tube. During the upward translation of the rebound tube, the support spring and the auxiliary spring are compressed and contracted, thereby absorbing the upward impact force and buffering the effect. After the support spring and the auxiliary spring buffer, the rebound tube and the drill rod are pushed back. Due to the damping property of the damping rod, the impact caused by the rebound of the support spring and the auxiliary spring is offset, thereby achieving a buffering effect on the drill rod; 2. When guiding and positioning drill rods of different widths and specifications, the controller can be used to control the servo motor to drive the driving shaft to rotate, the driving shaft rotation drives the driving gear to rotate synchronously, the driving gear rotation drives the driven gear to rotate synchronously, the driven gear rotation drives the rotating ring and the crown gear to rotate synchronously, the crown gear rotation drives multiple sets of linkage gears to rotate, thereby driving the threaded barrel to rotate, the threaded barrel rotation drives the screw to telescope, thereby pushing the arc push plate to extend or retract, so that drill rods of different specifications can be guided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 It is a schematic diagram of the structure of the drive box of Example 1 of the present application; Figure 3 is a schematic diagram of the structure of the buffer mechanism of Example 1 of the present application; Figure 4 is a schematic diagram of the structure of the guide mechanism of Example 1 of the present application; Figure 5 It is a schematic diagram of the connection structure between the threaded barrel and the screw rod of Example 1 of the present application; Figure 6 This is a side view of the guide mechanism of Example 1 of the present application. Figure 7 is a schematic diagram of the structure of the auxiliary limiting mechanism of Example 1 of the present application; Explanation of the reference numerals: 1. main frame; 2. drill rod support; 3. hydraulic telescopic rod; 4. winch; 5. steel cable; 6. top frame; 7. pulley; 8. drive box; 9. limit groove; 10. guide rod; 11. tube; 12. motor frame; 13. drive motor; 14. reducer; 15. buffer mechanism; 151. connecting tube; 152. rebound tube; 153. coupling joint; 154. strip groove; 155. slider; 156. damping rod; 157. support spring; 158. auxiliary spring; 16. drill rod; 17. guide mechanism; 171. limit frame; 18. guide tube; 19. movable groove; 20. arc push plate; 21. threaded tube ; 22. Screw; 23. Limit hole; 24. Limit rod; 25. Linkage gear; 26. Rotating ring; 27. Crown gear; 28. Driven gear; 29. ​​Servo motor; 30. Drive shaft; 31. Active gear; 32. Pressure sensor; 33. Controller; 34. Communication unit; 35. Auger; 36. Hydraulic support column; 37. Auxiliary limit mechanism; 38. No. 2 tube; 39. Connecting rod; 40. Adjustment ring; 41. Limit ring; 42. Adjustment plate; 43. Through groove; 44. Moving block; 45. Adjustment cylinder; 46. Threaded adjustment rod; 47. Adjustment torsion block; 48. Extrusion spring; 49. Buffer plate; 50. Ball. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 - Attachment Figure 7 , further details of this application are given.

[0026] Embodiment 1: A pile driver with little wear on drill rods, comprising a main frame 1, a drill rod support 2 is connected to one edge of the main frame 1 through a movable joint, a middle outer wall of one side of the drill rod support 2 is connected to the main frame 1 through a hydraulic telescopic rod 3, and both ends of the hydraulic telescopic rod 3 are connected to the drill rod support 2 and the main frame 1 through a movable shaft, a winch 4 is arranged on one side of the main frame 1, a steel cable 5 is wound on the drum of the winch 4, a top frame 6 is welded on the top of the drill rod support 2, and pulleys 7 are arranged on the top of the top frame 6 The end of the steel cable 5 away from the winch 4 extends upward through the pulley 7 and is connected to the drive box 8 through a lifting ring. A limit groove 9 is provided on the surface of the drill rod support 2 away from the main frame 1. The middle inner wall of the limit groove 9 is connected to a guide rod 10. A tube 11 is arranged and connected to the outer wall of one side of the drive box 8. The tube 11 is sleeved on the outer wall of the guide rod 10. A motor frame 12 is provided in the middle of the drive box 8. A drive motor 13 is connected to the center of the motor frame 12 by bolts. The bottom drive of the drive motor 13 is connected to a reducer 14. The reducer The bottom output end of 14 is connected to a buffer mechanism 15 through the drive box. The buffer mechanism 15 includes a connecting tube 151, a rebound tube 152, a coupling joint 153, a strip groove 154, a slider 155, a damping rod 156, a support spring 157 and an auxiliary spring 158. The main frame 1 plays a supporting role. The hydraulic telescopic rod 3 drives the drill rod support 2 to adjust the angle so that the drill rod support 2 can be stored when the pile driver is not in use. The winch 4 rewinds the steel cable 5 to achieve different heights of the drive box 8. The tube 11 is sleeved on the outer wall of the guide rod 10 to play a limiting role and cooperate with the guide mechanism 17 to guide the drill rod 16. When piling is carried out, the connecting tube 151 can be driven to rotate by the driving motor 13 and the reducer 14. The rotation of the connecting tube 151 drives the rebound tube 152 to rotate, thereby driving the drill rod 16 to rotate synchronously. The rotation of the drill rod 16 drives the spiral drill bit 35 to rotate synchronously to carry out piling drilling. The drill rod 16 can be buffered by the buffer mechanism 15 during the piling process.

[0027] A rebound cylinder 152 is embedded in the inner wall of the bottom end of the connecting cylinder 151, and a coupling joint 153 is provided at the opposite end of the connecting cylinder 151 and the rebound cylinder 152. The bottom output end of the reducer 14 is connected to the connecting cylinder 151 through the coupling joint 153. The inner walls on both sides of the connecting cylinder 151 are provided with strip grooves 154, and the outer walls on both sides of the middle part of the rebound cylinder 152 are connected with sliders 155. The sliders 155 are embedded in the strip grooves 154. The connecting cylinder 151 plays a connecting role and can be connected to the driving shaft of the reducer 14. The rebound cylinder 152 can perform translational movement in the connecting cylinder 151 through the guidance of the slider 155. At the same time, the slider 155 and the strip groove 154 play a limiting role so that the connecting cylinder 151 and the rebound cylinder 152 can rotate synchronously, thereby driving the drill rod 16 to perform drilling movement.

[0028] The inner wall of the connecting tube 151 is connected with damping rods 156, and a supporting spring 157 is arranged in the middle of the multiple groups of damping rods 156. One end of the damping rod 156 and the supporting spring 157 are connected to the rebound tube 152. One end of the slider 155 is connected to an auxiliary spring 158, and the auxiliary spring 158 is also embedded in the strip groove 154. The end of the rebound tube 152 away from the connecting tube 151 is connected to the drill rod 16 through the coupling joint 153. The bottom of the driving box 8 is provided with an auxiliary limiting mechanism 37, and the auxiliary limiting mechanism 37 includes The second tube 38, the connecting rod 39, the adjusting ring 40 and the limiting ring 41, the second tube 38 is arranged at the bottom of the tube 11, and the second tube 38 is sleeved on the outer wall of the guide rod 10, a connecting rod 39 is arranged on one side of the second tube 38, the middle outer wall of the connecting tube 151 is connected with the adjusting ring 40, the end of the connecting rod 39 away from the second tube 38 is connected with the limiting ring 41, the limiting ring 41 is sleeved on the outer wall of the adjusting ring 40, and the adjusting ring 40 and the limiting ring 41 are connected through a bearing, and the drill rod 16 adopts high strength and good wear resistance. The drill rod 16 is made of alloy material and is specially treated. When encountering a hard geological structure during drilling, it will be impacted upward. The drill rod 16 is impacted and pushed upward, thereby pushing the rebound cylinder 152 to move upward toward the connecting cylinder 151. During the upward translation of the rebound cylinder 152, the support spring 157 and the auxiliary spring 158 are compressed and contracted, thereby absorbing the upward impact force and buffering the impact force. After the support spring 157 and the auxiliary spring 158 buffer, the rebound cylinder 152 and the drill rod 16 are pushed back. Due to the damping property of the damping rod 156, the impact caused by the rebound of the support spring 157 and the auxiliary spring 158 is offset, thereby achieving a buffering effect on the drill rod 16. At the same time, the auxiliary limiting mechanism 37 can be used to assist in limiting the buffer mechanism 15, so that the drill rod 16 can always remain stable during the drilling process. The rotation of the connecting tube 151 will drive the adjusting ring 40 to rotate synchronously. The connecting tube 151 and the adjusting ring 40 can be limited by the limiting ring 41 to prevent the connecting tube 151 and the drill rod 16 from tilting.

[0029] The inner cavity of the connecting tube 151 is provided with an adjusting plate 42, and the ends of the damping rod 156 and the supporting spring 157 away from the rebound tube 152 are connected to the adjusting plate 42. The connecting tube 151 is provided with through grooves 43 on both sides adjacent to the strip groove 154. Both ends of the adjusting plate 42 are connected with moving blocks 44, and the ends of the two groups of moving blocks 44 pass through the through grooves 43 and extend to the outside of the connecting tube 151. Adjusting tubes 45 are embedded on both sides of the limiting ring 41. The adjusting tube 45 is connected to the adjusting ring 40 through a bearing. The inner wall of one end of the adjusting tube 45 is threadedly connected with a threaded adjusting rod 46, and the ends of the two groups of threaded adjusting rods 46 are respectively connected to the moving blocks 44 on both sides. Adjusting twist blocks 47 are provided at both ends of the adjusting ring 40 away from the adjusting tube 45. The two groups of adjusting twist blocks 47 The adjustment output end is connected to the adjustment cylinder 45. The adjustment ring 40 can adjust the buffering rebound force of the connecting cylinder 151 by twisting the adjustment block 47 while connecting and limiting the connecting cylinder 151, so as to improve the buffering effect on the drill rod 16. During adjustment, the adjustment cylinder 45 can be driven to rotate by twisting the adjustment block 47. The rotation of the adjustment cylinder 45 drives the threaded adjustment rod 46 to move up and down. The lifting and lowering of the threaded adjustment rod 46 drives the moving block 44 to move in translation, thereby driving the adjustment plate 42 to be adjusted synchronously. The support spring 157 is squeezed or relaxed by the movement of the adjustment plate 42, thereby changing the elastic force of the support spring 157, thereby achieving the buffering force of the buffer mechanism 15 so as to achieve a good buffering effect when facing drill rods 16 of different specifications.

[0030] A guide mechanism 17 is provided on one side of the bottom of the drill rod support 2, and the guide mechanism 17 includes a limit frame 171, a guide cylinder 18, a movable groove 19 and an arc-shaped push plate 20. The limit frame 171 is connected to the drill rod support 2 by bolts, and the middle part of the limit frame 171 is penetrated by the guide cylinder 18, and the inner wall of the guide cylinder 18 is surrounded by movable grooves 19, and the inner wall of the movable groove 19 is embedded with an arc-shaped push plate 20. The guide mechanism 17 ensures that the drill rod 16 maintains linear motion during the drilling process to reduce wear caused by bending. The drill rod 16 passes through the guide cylinder 18 and abuts against the arc-shaped push plate 20, thereby guiding and limiting the drill rod 16.

[0031] The inner wall centers of the multiple groups of movable grooves 19 are connected with threaded cylinders 21 through bearings, and one end of the threaded cylinder 21 away from the inner wall of the movable groove 19 is threadedly connected with a screw rod 22, and one end of the screw rod 22 away from the threaded cylinder 21 is connected to the arc-shaped push plate 20. The inner walls on both sides of the movable groove 19 are provided with limiting holes 23, and the outer walls on both sides of the arc-shaped push plate 20 are connected with limiting rods 24, and the limiting rods 24 are embedded in the limiting holes 23. The drill rod 16 is penetrated and arranged in the interior of the guide cylinder 18. The outer wall of the side of the arc-shaped push plate 20 away from the movable groove 19 is arranged with an extrusion spring 48, and the side of the extrusion spring 48 away from the arc-shaped push plate 20 is connected with a buffer plate 49, and the buffer plate 49 is away from Ball bearings 50 are arranged on the surface of one end of the arc-shaped push plate 20, and the threaded barrel 21 can rotate in the movable groove 19. The rotation of the threaded barrel 21 drives the screw rod 22 to perform telescopic movement, thereby pushing the arc-shaped push plate 20 to extend or retract, so that drill rods 16 of different specifications can be guided. The guided drill rod 16 can be buffered to a certain extent by the extrusion spring 48 and the buffer plate 49 to prevent the drill rod 16 from being damaged during the guiding process of the guide mechanism 17 after the drill rod 16 tilts during the drilling process. At the same time, the ball bearings 50 can make it slide in connection with the drill rod 16 to prevent the drill rod 16 and the buffer plate 49 from causing greater wear during the contact process.

[0032] One end of the multiple groups of threaded barrels 21 away from the screw rod 22 passes through the guide barrel 18 and is connected to a linkage gear 25. A rotating ring 26 is sleeved on the outer wall of one side of the guide barrel 18. The rotating ring 26 and the guide barrel 18 are movably connected through a bearing. A crown gear 27 is connected to the top outer wall of the rotating ring 26. The crown gear 27 is meshed with the linkage gear 25. A driven gear 28 is sleeved on the outer wall of the rotating ring 26. The driven gear 28 rotates to drive the rotating ring 26 to rotate synchronously. The rotation of the crown gear 27 drives the multiple groups of linkage gears 25 to rotate, thereby driving the threaded barrel 21 to rotate synchronously. The rotating ring 26 can rotate on the outer wall of the guide barrel 18. The rotation of the rotating ring 26 drives the crown gear 27 to rotate synchronously. The rotation of the crown gear 27 drives the multiple groups of linkage gears 25 to rotate, thereby driving the threaded barrel 21 to rotate, thereby driving the arc push plate 20.

[0033] A servo motor 29 is provided at one side of the bottom of the limit frame 171, and the output end of the servo motor 29 passes through the limit frame 171 and is connected to a drive shaft 30, and the drive shaft 30 is connected to the limit frame 171 through a bearing, and a driving gear 31 is connected to the middle outer wall key of the drive shaft 30, and the driving gear 31 is meshed with the driven gear 28. The servo motor 29 drives the drive shaft 30 to rotate, and the rotation of the drive shaft 30 drives the driving gear 31 to rotate synchronously, and the rotation of the driving gear 31 drives the driven gear 28 to rotate synchronously. At the same time, when guiding and positioning the drill rods 16 with different width specifications, the driving servo motor can be controlled by the controller 33 The machine 29 drives the driving shaft 30 to rotate, the driving shaft 30 rotates to drive the driving gear 31 to rotate synchronously, the driving gear 31 rotates to drive the driven gear 28 to rotate synchronously, the driven gear 28 rotates to drive the rotating ring 26 and the crown gear 27 to rotate synchronously, the crown gear 27 rotates to drive the multiple sets of linkage gears 25 to rotate, thereby driving the threaded barrel 21 to rotate, the threaded barrel 21 rotates to drive the screw 22 to telescope, thereby pushing the arc push plate 20 to extend or retract, thereby guiding drill rods 16 of different specifications, and at the same time, a brake mechanism is arranged inside the servo motor 29 to maintain the current torque in the event of a power outage.

[0034] Pressure sensors 32 are embedded in the outer walls of the ends of the multiple groups of buffer plates 49 away from the movable groove 19, a controller 33 is provided on one side of the limit frame 171, and a communication unit 34 is provided on one side of the controller 33. The controller 33 is connected to the pressure sensor 32, the servo motor 29 and the communication unit 34 through wires. The bottom end of the drill rod 16 is connected to a spiral drill bit 35 through the guide cylinder 18, and hydraulic support columns 36 are arranged at the edges of the main frame 1. The pressure between the arc push plate 20 and the drill rod 16 can be detected in real time by the pressure sensor 32 to guide it. When the drill rod 16 tilts during the drilling process, the pressure between the drill rod 16 and the buffer plate 49 on one side of the tilting direction increases. When the pressure sensor 32 detects that the pressure exceeds the set safety value, the signal can be transmitted to the staff through the communication unit 34 for timely correction. The spiral drill bit 35 is a detachable structure and can be replaced when it is severely worn. The hydraulic support column 36 can support and fix the pile driver as a whole to keep it stable.

[0035] The piling method includes the following steps: Step 1: First, make construction preparations, ensure that the construction site is flat, solid, and free of obstacles, and set up obvious warning signs. Non-construction personnel are not allowed to enter. Check whether all parts of the pile driver are intact, whether the hydraulic system, electrical system, etc. are normal, connect the drill rod 16 with the rebound cylinder 152 through the coupling joint 153, ensure that the drill rod 16 and the guide mechanism 17 are closely matched, start the pile driver, and conduct a no-load test run to check whether all parts are operating normally; Step 2: According to geological data and construction requirements, select appropriate drilling parameters, such as drilling speed, impact force, etc., drive the connecting tube 151 to rotate by the driving motor 13 in cooperation with the reducer 14, the connecting tube 151 rotates to drive the rebound tube 152 to rotate, thereby driving the drill rod 16 to rotate synchronously, and the rotation of the drill rod 16 drives the spiral drill bit 35 to rotate synchronously to perform pile drilling. During the drilling process, observe the contact between the drill rod 16 and the ground at any time. If any abnormality is found, stop drilling immediately and check the cause; Step 3: When the drill rod 16 encounters a harder geology during drilling, it will be impacted upwards. The drill rod 16 is impacted and pushed upwards, thereby pushing the rebound cylinder 152 to impact and move upwards in the direction of the connecting cylinder 151. During the upward translation of the rebound cylinder 152, the support spring 157 and the auxiliary spring 158 are compressed and contracted, thereby absorbing the upward impact force and thus playing a role of buffering. After the support spring 157 and the auxiliary spring 158 buffer, the rebound cylinder 152 and the drill rod 16 are pushed back. Due to the damping property of the damping rod 156, the impact caused by the rebound of the support spring 157 and the auxiliary spring 158 is offset, thereby achieving a buffering effect on the drill rod 16. Step 4: Ensure that the drill rod maintains linear motion during the drilling process through the guide mechanism 17 to reduce wear caused by bending. At the same time, when guiding and positioning drill rods 16 of different widths and specifications, the controller 33 can be used to control the driving servo motor 29 to drive the driving shaft 30 to rotate. The driving shaft 30 rotates to drive the driving gear 31 to rotate synchronously. The driving gear 31 rotates to drive the driven gear 28 to rotate synchronously. The driven gear 28 rotates to drive the rotating ring 26 and the crown gear 27 to rotate synchronously. The crown gear 27 rotates to drive the multiple sets of linkage gears 25 to rotate, thereby driving the threaded barrel 21 to rotate. The threaded barrel 21 rotates to drive the screw 22 to perform telescopic movement, thereby pushing the arc push plate 20 to extend or retract, so that drill rods 16 of different specifications can be guided. After the pressure sensor 32 detects that the buffer plate 49 is in contact with the outer wall of the drill rod 16, it transmits a signal to the controller 33. The controller 33 controls the servo motor 29 to stop driving, thereby guiding and positioning drill rods 16 of different specifications, thereby avoiding increased wear caused by tilting. Step 5: After drilling to a certain depth, stop drilling, lift the drill rod 16 out of the ground, and check the wear of the drill rod. If the drill rod 16 is found to be severely worn, replace it with a new drill rod 16 in time, and regularly maintain the drill rod 16, such as cleaning and oiling, to extend the service life of the drill rod.

[0036] The implementation principle of the embodiment of the present application is as follows: first, construction preparation is carried out to ensure that the construction site is flat, solid and free of obstacles, and obvious warning signs are set up at the same time. Non-construction personnel are not allowed to enter. Check whether the various components of the pile driver are intact, whether the hydraulic system, electrical system, etc. are normal, connect the drill rod 16 with the rebound cylinder 152 through the coupling joint 153, ensure that the drill rod 16 and the guide mechanism 17 are closely matched, start the pile driver, and perform a no-load test run to check whether the operation of each part is normal. According to geological data and construction requirements, select appropriate drilling parameters, such as drilling speed, impact force, etc., and drive the connecting cylinder 151 to rotate through the driving motor 13 in cooperation with the reducer 14. The rotation of the connecting cylinder 151 drives the rebound cylinder 152 to rotate, thereby driving the drill rod 16 The drill rod 16 rotates synchronously, and the spiral drill bit 35 rotates synchronously through the rotation of the drill rod 16 to perform pile drilling. During the drilling process, the contact between the drill rod 16 and the ground is observed at any time. If any abnormality is found, the drilling should be stopped immediately to check the cause. When the drill rod 16 encounters a harder geology during drilling, it will be impacted upward. The drill rod 16 is impacted and pushed upward, thereby pushing the rebound cylinder 152 to move upward toward the connecting cylinder 151. During the upward translation of the rebound cylinder 152, the support spring 157 and the auxiliary spring 158 are compressed and contracted, thereby absorbing the upward impact force and thus buffering the effect. After the support spring 157 and the auxiliary spring 158 buffer, the rebound cylinder 152 and the drill rod 16 are pushed back due to the damping rod The damping property of 156 offsets the impact caused by the rebound of the support spring 157 and the auxiliary spring 158, thereby achieving a buffering effect on the drill rod 16. At the same time, the auxiliary limiting mechanism 37 can be used to assist the limiting effect on the buffer mechanism 15, so that the drill rod 16 can always remain stable during the drilling process. The rotation of the connecting tube 151 will drive the adjusting ring 40 to rotate synchronously. The connecting tube 151 and the adjusting ring 40 can be limited by the limiting ring 41 to avoid the connecting tube 151 and the drill rod 16 from tilting. When the adjusting ring 40 connects and limits the connecting tube 151, the buffering rebound force can be adjusted by twisting the adjusting torsion block 47 to improve the buffering effect on the drill rod 16. During adjustment, the adjusting torsion block 47 can be driven The adjusting cylinder 45 rotates, and the rotation of the adjusting cylinder 45 drives the threaded adjusting rod 46 to perform lifting movement. The lifting of the threaded adjusting rod 46 drives the moving block 44 to perform translational movement, thereby driving the adjusting plate 42 to perform synchronous adjustment. The adjusting plate 42 moves to squeeze or relax the support spring 157, thereby changing the elastic force of the support spring 157, thereby adjusting the buffering force of the buffer mechanism 15 so that a good buffering effect can be achieved when facing drill rods 16 of different specifications. The guide mechanism 17 ensures that the drill rod maintains linear motion during the drilling process to reduce wear caused by bending. At the same time, when facing drill rods 16 of different widths for guiding and positioning, the controller 33 can be used to control the drive servo motor 29 to drive the drive shaft 30 to rotate.The driving shaft 30 rotates to drive the driving gear 31 to rotate synchronously, the driving gear 31 rotates to drive the driven gear 28 to rotate synchronously, the driven gear 28 rotates to drive the rotating ring 26 and the crown gear 27 to rotate synchronously, the crown gear 27 rotates to drive the multiple sets of linkage gears 25 to rotate, thereby driving the threaded barrel 21 to rotate, the threaded barrel 21 rotates to drive the screw 22 to perform telescopic movement, thereby pushing the arc-shaped push plate 20 to extend or retract, so that drill rods 16 of different specifications can be guided, and the guided drill rod 16 can be buffered to a certain extent by the extrusion spring 48 and the buffer plate 49 to prevent the drill rod 16 from being damaged during the guiding process of the guide mechanism 17 after the drill rod 16 is tilted during the drilling process. At the same time, the ball bearing 50 can be connected to the drill rod 16 in a sliding manner to avoid greater wear and tear between the drill rod 16 and the buffer plate 49 during the contact process. After the pressure sensor 32 detects that the buffer plate 49 is in contact with the outer wall of the drill rod 16, it transmits a signal to the controller 33, and the controller 33 controls the servo motor 29 to stop driving, so that the drill rods 16 of different specifications are guided and positioned, thereby avoiding increased wear caused by tilting. After drilling to a certain depth, stop drilling, lift the drill rod 16 out of the ground, and check the wear of the drill rod. If the drill rod 16 is found to be severely worn, replace it with a new one in time, and regularly maintain the drill rod 16, such as cleaning and oiling, to extend the service life of the drill rod.

[0037] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pile driver with low drill rod wear, comprising a main frame (1), characterized in that: A drill rod support (2) is connected to the edge of one side of the main frame (1) via a movable joint, a middle outer wall of one side of the drill rod support (2) and the main frame (1) are connected via a hydraulic telescopic rod (3), and both ends of the hydraulic telescopic rod (3) are connected to the drill rod support (2) and the main frame (1) via a movable shaft, a winch (4) is provided on one side surface of the main frame (1), a steel cable (5) is wound around the drum of the winch (4), a top frame (6) is welded to the top of the drill rod support (2), a pulley (7) is arranged on the top of the top frame (6), an end of the steel cable (5) away from the winch (4) extends upward, passes through the pulley (7), and is connected to a drive box (8) via a lifting ring, and a limit groove (6) is provided on the surface of one side of the drill rod support (2) away from the main frame (1). 9), a guide rod (10) is connected to the inner wall of the middle part of the limit groove (9), a tube (11) is arranged and connected to the outer wall of one side of the drive box (8), the tube (11) is sleeved on the outer wall of the guide rod (10), a motor frame (12) is arranged in the middle part of the drive box (8), a drive motor (13) is connected to the center of the motor frame (12) by bolts, the bottom drive of the drive motor (13) is connected to a reducer (14), the bottom output end of the reducer (14) is connected to a buffer mechanism (15) through the drive box, and the buffer mechanism (15) comprises a connecting tube (151), a rebound tube (152), a coupling joint (153), a strip groove (154), a slider (155), a damping rod (156), a support spring (157) and an auxiliary spring (158).

2. The pile driver with low drill rod wear according to claim 1, characterized in that: A rebound cylinder (152) is embedded in the inner wall of the bottom end of the connecting cylinder (151); a coupling joint (153) is provided at the opposite end of the connecting cylinder (151) and the rebound cylinder (152); the bottom output end of the reducer (14) and the connecting cylinder (151) are connected via the coupling joint (153); strip grooves (154) are provided on the inner walls on both sides of the connecting cylinder (151); and sliding blocks (155) are connected to the outer walls on both sides of the middle portion of the rebound cylinder (152); and the sliding blocks (155) are embedded in the strip grooves (154).

3. The pile driver with low drill rod wear according to claim 1, characterized in that: The inner wall of the connecting tube (151) is connected to damping rods (156), and a plurality of groups of damping rods (156) are provided with support springs (157) in the middle. One end of the damping rods (156) and the support springs (157) are connected to the rebound tube (152). One end of the sliding block (155) is connected to an auxiliary spring (158), and the auxiliary spring (158) is also embedded in the strip groove (154). One end of the rebound tube (152) away from the connecting tube (151) is connected to the drill rod (16) via a coupling joint (153). The bottom of the driving box (8) is provided with an auxiliary limiting mechanism (37). The structure (37) comprises a second tube (38), a connecting rod (39), an adjustment ring (40) and a limit ring (41); the second tube (38) is arranged at the bottom of the tube (11), and the second tube (38) is sleeved on the outer wall of the guide rod (10); a connecting rod (39) is arranged on one side of the second tube (38); the middle outer wall of the connecting tube (151) is connected to the adjustment ring (40); one end of the connecting rod (39) away from the second tube (38) is connected to the limit ring (41); the limit ring (41) is sleeved on the outer wall of the adjustment ring (40), and the adjustment ring (40) and the limit ring (41) are connected via a bearing.

4. The pile driver with low drill rod wear according to claim 3, characterized in that: The inner cavity of the connecting tube (151) is provided with an adjustment plate (42); the ends of the damping rod (156) and the support spring (157) away from the rebound tube (152) are connected to the adjustment plate (42); through grooves (43) are provided on both sides of the connecting tube (151) adjacent to the strip groove (154); both ends of the adjustment plate (42) are connected to moving blocks (44); the ends of the two groups of moving blocks (44) pass through the through grooves (43) and extend to the outside of the connecting tube (151); the limiting ring An adjusting cylinder (45) is embedded on both sides of the adjusting ring (41), the adjusting cylinder (45) and the adjusting ring (40) are connected via a bearing, a threaded adjusting rod (46) is threadedly connected to the inner wall of one end of the adjusting cylinder (45), the ends of two groups of the threaded adjusting rods (46) are respectively connected to the moving blocks (44) on both sides, and adjusting twist blocks (47) are arranged at both ends of the adjusting ring (40) away from the adjusting cylinder (45), and the adjusting output ends of the two groups of the adjusting twist blocks (47) are connected to the adjusting cylinder (45).

5. The pile driver with low drill rod wear according to claim 3, characterized in that: A guide mechanism (17) is provided on one side of the bottom of the drill rod support (2), and the guide mechanism (17) comprises a limit frame (171), a guide cylinder (18), a movable groove (19) and an arc-shaped push plate (20). The limit frame (171) and the drill rod support (2) are connected by bolts, and the guide cylinder (18) is connected to the middle of the limit frame (171), and the inner wall of the guide cylinder (18) is surrounded by movable grooves (19), and the inner wall of the movable groove (19) is embedded with an arc-shaped push plate (20).

6. The pile driver with low drill rod wear according to claim 5, characterized in that: The centers of the inner walls of the plurality of groups of movable grooves (19) are connected to threaded cylinders (21) via bearings. One end of the threaded cylinder (21) away from the inner wall of the movable groove (19) is threadedly connected to a screw rod (22). One end of the screw rod (22) away from the threaded cylinder (21) is connected to an arc-shaped push plate (20). Limiting holes (23) are provided on both inner walls of the movable groove (19). Both outer walls of the arc-shaped push plate (20) are connected to limiting rods (24). The limiting rods (24) are embedded in the limiting holes (23). The drill rod (16) is arranged through the inside of the guide cylinder (18). An extrusion spring (48) is arranged on the outer wall of one side of the arc-shaped push plate (20) away from the movable groove (19). A buffer plate (49) is connected to the side of the extrusion spring (48) away from the arc-shaped push plate (20). Ball bearings (50) are arranged on the surface of one end of the buffer plate (49) away from the arc-shaped push plate (20).

7. The pile driver with low drill rod wear according to claim 6, characterized in that: One end of the plurality of groups of threaded barrels (21) away from the screw rod (22) passes through the guide barrel (18) and is connected to a linkage gear (25); a rotating ring (26) is sleeved on the outer wall of one side of the guide barrel (18); the rotating ring (26) and the guide barrel (18) are movably connected via a bearing; a crown gear (27) is connected to the top outer wall of the rotating ring (26); the crown gear (27) is meshed with the linkage gear (25); a driven gear (28) is sleeved on the outer wall of the rotating ring (26); the driven gear (28) rotates to drive the rotating ring (26) to rotate synchronously; the crown gear (27) rotates to drive the plurality of groups of linkage gears (25) to rotate, thereby driving the threaded barrel (21) to rotate synchronously.

8. The pile driver with low drill rod wear according to claim 7, characterized in that: A servo motor (29) is arranged on one side of the bottom of the limiting frame (171); an output end of the servo motor (29) passes through the limiting frame (171) and is connected to a driving shaft (30); the driving shaft (30) and the limiting frame (171) are connected via a bearing; a driving gear (31) is keyed to an outer wall of a middle portion of the driving shaft (30); the driving gear (31) is meshed with a driven gear (28); the servo motor (29) drives the driving shaft (30) to rotate; the driving shaft (30) rotates to drive the driving gear (31) to rotate synchronously; the driving gear (31) rotates to drive the driven gear (28) to rotate synchronously.

9. The pile driver with low drill rod wear according to claim 8, characterized in that: The outer walls of the ends of the plurality of buffer plates (49) away from the movable groove (19) are all embedded with pressure sensors (32); a controller (33) is provided on one side of the limit frame (171); a communication unit (34) is provided on one side of the controller (33); the controller (33) is connected to the trigger switch (52), the pressure sensor (32), the servo motor (29) and the communication unit (34) through electric wires; the bottom end of the drill rod (16) is connected to a spiral drill bit (35) through a guide cylinder (18); and hydraulic support columns (36) are arranged at the edge of the main frame (1).

10. A pile driving method with low drill rod wear, using the pile driver with low drill rod wear according to any one of claims 1 to 9, characterized in that: The piling method comprises the following steps: Step 1: First, make construction preparations, ensure that the construction site is flat, solid, and free of obstacles, and set up obvious warning signs to prohibit non-construction personnel from entering. Check whether all parts of the pile driver are intact, whether the hydraulic system, electrical system, etc. are normal, connect the drill rod (16) and the rebound cylinder (152) through the coupling joint (153), ensure that the drill rod (16) and the guide mechanism (17) are closely matched, start the pile driver, and conduct a no-load test run to check whether all parts are operating normally; Step 2: According to geological data and construction requirements, appropriate drilling parameters such as drilling speed, impact force, etc. are selected, and the connecting tube (151) is driven to rotate by the driving motor (13) in cooperation with the reducer (14). The rotation of the connecting tube (151) drives the rebound tube (152) to rotate, thereby driving the drill rod (16) to rotate synchronously. The rotation of the drill rod (16) drives the spiral drill bit (35) to rotate synchronously, thereby performing pile drilling. During the drilling process, the contact between the drill rod (16) and the ground is observed at any time. If any abnormality is found, the drilling should be stopped immediately and the cause should be checked; Step 3: When the drill rod (16) encounters a harder geology during drilling, it will be impacted upwards. The drill rod (16) is pushed upwards by the impact, thereby pushing the rebound cylinder (152) to move upwards in the direction of the connecting cylinder (151). During the upward translation of the rebound cylinder (152), the support spring (157) and the auxiliary spring (158) are compressed and contracted, thereby absorbing the upward impact force and thus playing a buffering role. After the support spring (157) and the auxiliary spring (158) buffer, the rebound cylinder (152) and the drill rod (16) are pushed to rebound. Due to the damping property of the damping rod (156), the impact caused by the rebound of the support spring (157) and the auxiliary spring (158) is offset, thereby achieving a buffering effect on the drill rod (16); Step 4: The guide mechanism (17) is used to ensure that the drill rod maintains linear motion during the drilling process, thereby reducing wear caused by bending. At the same time, when guiding and positioning drill rods (16) of different widths, the controller (33) can be used to control the drive servo motor (29) to drive the drive shaft (30) to rotate. The rotation of the drive shaft (30) drives the driving gear (31) to rotate synchronously. The rotation of the driving gear (31) drives the driven gear (28) to rotate synchronously. The rotation of the driven gear (28) drives the rotating ring (26) and the crown gear (27) to rotate synchronously. The rotation of the crown gear (27) drives the rotating ring (26) and the crown gear (27) to rotate synchronously. The plurality of linkage gears (25) are driven to rotate, thereby driving the threaded barrel (21) to rotate. The rotation of the threaded barrel (21) drives the screw rod (22) to perform telescopic movement, thereby pushing the arc-shaped push plate (20) to extend or retract, thereby guiding drill rods (16) of different specifications. After the pressure sensor (32) detects that the buffer plate (49) is in contact with the outer wall of the drill rod (16), a signal is transmitted to the controller (33). The controller (33) controls the servo motor (29) to stop driving, thereby guiding and positioning the drill rods (16) of different specifications, thereby avoiding increased wear caused by tilting. Step 5: After drilling to a certain depth, stop drilling, lift the drill rod (16) out of the ground, and check the wear of the drill rod. If the drill rod (16) is found to be seriously worn, replace it with a new drill rod (16) in time. Perform maintenance on the drill rod (16) regularly, such as cleaning and oiling, to extend the service life of the drill rod.

Images