A bridge pile foundation drilling device

Abstract

The present invention belongs to the technical field of soil drilling, and in particular relates to a bridge pile foundation drilling device, comprising a support seat, a lifting assembly fixedly mounted on the upper end of the support seat, a movable end of the lifting assembly fixedly connected to a drive motor, a lower output end of the drive motor fixedly connected to a spiral drill rod, a lower end of the spiral drill rod fixedly connected to a drill bit, and further comprising: a pressurized connection mechanism, an impact crushing auxiliary mechanism, multiple groups of outward expansion auxiliary positioning mechanisms, an impact action starting mechanism, an invalid operation alarm mechanism, and an impact intensity control mechanism. The present invention can monitor the drilling pressure and rotational torque in real time, control the speed reduction to prevent the drill bit from breaking when the threshold is exceeded, and apply moderate impact to break the obstacle when encountering a drilling obstacle, thereby avoiding the high cost and low efficiency of large-scale equipment, and issuing an alarm when the impact intensity increases three times without breaking, thereby assisting staff in quickly adjusting the construction plan.

Description

Technical Field

[0001] The invention belongs to the technical field of soil layer drilling, and in particular relates to a bridge pile foundation drilling device. Background Art

[0002] In the construction of bridge pile foundations, it is necessary to use drilling equipment in advance to form pile holes that meet the design requirements in the foundation, so that the pile foundation can be formed through subsequent processes such as placing steel cages and pouring concrete, thereby safely and reliably transferring the bridge load to the deep ground. For example, a bridge pile foundation drilling device is proposed in patent publication number CN118728256B.

[0003] During the drilling construction of bridge pile foundations, the difference in soil hardness significantly affects the working condition of the drill tool. When the drill tool enters the hard soil layer, the cutting resistance increases dramatically, causing the load to far exceed its bearing threshold, which can easily cause damage to the drill tool such as wear and breakage. If the rotary cutting force cannot meet the needs of continuing drilling, impact crushing equipment is often used in engineering to destroy the hard soil layer to ensure the smooth progress of the drilling operation.

[0004] However, the existing construction process has obvious drawbacks. Before using the impact crushing equipment, the drill tool must be removed first and then the impact equipment must be placed in the hole. The operation is cumbersome and complicated. When faced with drilling obstruction problems that can be solved with a smaller impact crushing force, this method will cause serious waste of equipment resources. Not only will it greatly increase the cost of drilling construction, but frequent equipment replacement will also significantly reduce construction efficiency, extend the project cycle, and restrict the economy and timeliness of drilling construction. Summary of the Invention

[0005] The purpose of the present invention is to provide a bridge pile foundation drilling device in view of the above problems.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a bridge pile foundation drilling device, comprising a support base, a lifting assembly fixedly mounted on the upper end of the support base, a driving motor fixedly connected to the movable end of the lifting assembly, a spiral drill rod fixedly connected to the lower output end of the driving motor, a drill bit fixedly connected to the lower end of the spiral drill rod, and further comprising:

[0007] A pressurized connection mechanism, fixedly installed between the moving end of the lifting assembly and the drive motor;

[0008] An impact crushing auxiliary mechanism, fixedly installed between the auger rod and the drill bit;

[0009] Multiple groups of outward expansion auxiliary positioning mechanisms are evenly embedded in the outer wall of the impact crushing auxiliary mechanism;

[0010] an impact action starting mechanism, fixedly mounted inside the impact crushing auxiliary mechanism and electrically connected to the impact crushing auxiliary mechanism;

[0011] An invalid operation alarm mechanism is fixedly mounted on the support seat and is used to provide a warning signal to the operator when the impact crushing auxiliary mechanism is unable to process the hard soil layer;

[0012] The impact strength regulating mechanism is fixedly mounted on the upper end of the support seat and is transmission-connected to the invalid operation warning mechanism.

[0013] In the above-mentioned bridge pile foundation drilling device, the pressurized connection mechanism includes a U-shaped connecting seat fixedly connected to the moving end of the lifting assembly, the outer wall of the driving motor is fixedly sleeved with a connecting plate, the inner wall of the U-shaped connecting seat is symmetrically fixedly connected with multiple fixed sliding rods, the surface of the connecting plate is provided with multiple fixed sliding holes that are slidably sleeved with the fixed sliding rods, and a pressure sensor is fixedly installed on the top of the inner wall of the U-shaped connecting seat.

[0014] In the above-mentioned bridge pile foundation drilling device, the impact crushing auxiliary mechanism includes a fixed cylinder fixedly connected to the lower end of the spiral drill rod, the lower end of the fixed cylinder is fixedly connected to the upper end of the drill bit, and a plurality of vertically arranged impact rods are movably inserted on the drill bit. The lower end of the impact rod is fixedly connected to an impact head, and the impact head is embedded in the lower end of the drill bit. The upper end of the impact rod is fixedly connected to an impact plate, and a return spring sleeved on the outside of the impact rod is fixedly connected between the impact plate and the drill bit. The upper end of the impact plate is fixedly connected to a force-bearing permanent magnet plate, and the top of the inner wall of the fixed cylinder is fixedly installed with positive and negative electromagnetic plates arranged opposite to the force-bearing permanent magnet plate.

[0015] In the above-mentioned bridge pile foundation drilling device, the outward expansion auxiliary positioning mechanism includes an electric push rod fixedly embedded in the outer wall of the fixed cylinder, the movable end of the electric push rod is fixedly connected to a pushing plate, a resistance plate is provided on one side of the pushing plate, and a plurality of anti-slip rods are symmetrically fixedly connected to the rear side of the resistance plate, the end of the anti-slip rod away from the resistance plate passes through the side wall of the pushing plate and is fixedly connected to the anti-slip plate, a plurality of compensation springs arranged outside the anti-slip rod are fixedly connected between the resistance plate and the pushing plate, and a plurality of limit rods are also fixedly connected to the side of the pushing plate close to the resistance plate, and a plurality of through holes are provided on the surface of the resistance plate for the limit rods to extend through, and the outer wall of the fixed cylinder is also provided with a placement groove for accommodating the pushing plate and the resistance plate.

[0016] In the above-mentioned bridge pile foundation drilling device, the impact action starting mechanism includes a starting circular shell fixedly installed on the inner wall of the fixed cylinder, a rotating shaft is rotatably connected at the center of the inner wall of the starting circular shell, a starting motor for driving the rotating shaft to rotate is fixedly installed on the outer wall of the starting circular shell, a forward electric contact block and a reverse electric contact block are symmetrically fixedly installed on the inner wall of the starting circular shell, and an arc-shaped conductive block that is in electrical contact with the forward electric contact block and the reverse electric contact block is fixedly connected to the shaft wall of the rotating shaft.

[0017] In the above-mentioned bridge pile foundation drilling device, the invalid operation alarm mechanism includes a statistical shell fixedly mounted on the upper end of the support seat, the internal sealing sleeve of the statistical shell is provided with a movable piston, the side wall sealing sleeve of the statistical shell is provided with an air pump, and the side wall of the statistical shell corresponding to the side of the air pump is also fixedly provided with a pressure relief pipe, an electromagnetic valve is installed on the pressure relief pipe, and the side of the movable piston away from the air pump is fixedly connected to a transmission rack, and a reset spring sleeved on the outside of the transmission rack is fixedly connected between the movable piston and the statistical shell, one end of the transmission rack extends through the outside of the statistical shell, and the inner wall of the statistical shell is fixedly provided with a warning switch arranged opposite to the movable piston.

[0018] In the above-mentioned bridge pile foundation drilling device, the impact strength control mechanism includes a potentiometer and a reduction gearbox fixedly installed on the upper end of the support seat, the upper input end of the reduction gearbox is fixedly connected to a transmission gear meshing with the transmission rack, and the lower output end of the reduction gearbox is fixedly connected to the center of the rotating end of the potentiometer.

[0019] In the above-mentioned bridge pile foundation drilling device, a counterweight block is fixedly installed on the side of the moving end of the lifting assembly away from the driving motor.

[0020] Compared with the existing technology, the beneficial effects of the present invention are:

[0021] 1. Through the set pressurized connection mechanism, lifting assembly, drive motor, spiral drill rod, and drill bit, the drilling pressure and rotational torque can be monitored and fed back in real time during the drilling process, and when the pressure and rotational torque reach the threshold, the signal can be fed back in time, and the rotary cutting speed and feed speed can be further adjusted to reduce the problem of excessive load causing the drill tool to break and affecting the stable drilling work.

[0022] 2. Through the set impact crushing auxiliary mechanism, outward expansion auxiliary positioning mechanism, impact action starting mechanism, and impact intensity control mechanism, when encountering a situation where it is impossible to continue drilling deeper, it can directly apply appropriate impact crushing force to the obstacle, which can effectively solve mild drilling obstacles and avoid the problems of increased use costs and reduced drilling efficiency caused by the direct use of large-scale impact crushing equipment.

[0023] 3. Through the invalid operation alarm mechanism, under the condition of gradually increasing auxiliary impact crushing strength, if the obstacle encountered cannot be handled for three consecutive times, the warning signal will be fed back to the staff in time to assist the staff to arrange and adjust other construction plans more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a front view structural schematic diagram of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the pressurized connection mechanism of the present invention;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the drill bit of the present invention;

[0028] Figure 5 It is a schematic cross-sectional view of the impact crushing auxiliary mechanism of the present invention;

[0029] Figure 6 It is a schematic cross-sectional view of the outward expansion auxiliary positioning mechanism of the present invention;

[0030] Figure 7 It is a schematic cross-sectional view of the impact action starting mechanism of the present invention;

[0031] Figure 8 It is a schematic cross-sectional structural diagram of the invalid operation alarm mechanism of the present invention.

[0032] In the figure: 1 support seat, 2 pressurized connecting mechanism, 21 U-shaped connecting seat, 22 connecting plate, 23 fixed slide rod, 24 pressure sensor, 3 impact crushing auxiliary mechanism, 31 fixed cylinder, 32 impact rod, 33 impact head, 34 impact plate, 35 return spring, 36 force-bearing permanent magnetic plate, 37 positive and negative electromagnetic plate, 4 outward expansion auxiliary positioning mechanism, 41 electric push rod, 42 squeeze push plate, 43 contact plate, 44 anti-slip rod, 45 anti-slip plate, 46 compensation spring, 47 limit rod, 48 embedding groove, 5 impact action start Mechanism, 51 starting round shell, 52 rotating shaft, 53 starting motor, 54 forward electrical connection block, 55 reverse electrical connection block, 56 arc-shaped conductive block, 6 invalid operation alarm mechanism, 61 statistical shell, 62 moving piston, 63 air pump, 64 pressure relief pipe, 65 solenoid valve, 66 transmission rack, 67 return spring, 68 warning switch, 7 impact strength control mechanism, 71 potentiometer, 72 reduction gear box, 73 transmission gear, 8 lifting assembly, 9 driving motor, 10 auger rod, 11 drill bit, 12 counterweight block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-8 As shown, a bridge pile foundation drilling device includes a support base 1, a lifting assembly 8 is fixedly installed on the upper end of the support base 1, a driving motor 9 is fixedly connected to the movable end of the lifting assembly 8, a counterweight 12 is fixedly installed on the side of the movable end of the lifting assembly 8 away from the driving motor 9, an auger rod 10 is fixedly connected to the lower output end of the driving motor 9, and a drill bit 11 is fixedly connected to the lower end of the auger rod 10, and further includes:

[0035] The pressurized connecting mechanism 2 is fixedly installed between the moving end of the lifting assembly 8 and the drive motor 9. The pressurized connecting mechanism 2 includes a U-shaped connecting seat 21 fixedly connected to the moving end of the lifting assembly 8. A connecting plate 22 is fixedly sleeved on the outer wall of the drive motor 9. A plurality of fixed slide rods 23 are symmetrically fixedly connected to the inner wall of the U-shaped connecting seat 21. A plurality of fixed slide holes for sliding sleeves with the fixed slide rods 23 are opened on the surface of the connecting plate 22. A pressure sensor 24 is fixedly installed on the top of the inner wall of the U-shaped connecting seat 21.

[0036] The impact crushing auxiliary mechanism 3 is fixedly installed between the spiral drill rod 10 and the drill bit 11. The impact crushing auxiliary mechanism 3 includes a fixed cylinder 31 fixedly connected to the lower end of the spiral drill rod 10, and the lower end of the fixed cylinder 31 is fixedly connected to the upper end of the drill bit 11. The drill bit 11 is movably sleeved with multiple vertically arranged impact rods 32, and the lower end of the impact rod 32 is fixedly connected with an impact head 33, and the impact head 33 is embedded in the lower end of the drill bit 11. The upper end of the impact rod 32 is fixedly connected with an impact plate 34, and a return spring 35 sleeved on the outside of the impact rod 32 is fixedly connected between the impact plate 34 and the drill bit 11. The upper end of the impact plate 34 is fixedly connected with a force-bearing permanent magnet plate 36, and the top of the inner wall of the fixed cylinder 31 is fixedly installed with a positive and negative electromagnetic plate 37 arranged opposite to the force-bearing permanent magnet plate 36.

[0037] Multiple groups of outward expansion auxiliary positioning mechanisms 4 are evenly embedded in the outer wall of the impact crushing auxiliary mechanism 3. The outward expansion auxiliary positioning mechanism 4 includes an electric push rod 41 fixedly embedded in the outer wall of the fixed cylinder 31. The movable end of the electric push rod 41 is fixedly connected to a pushing plate 42. A resistance plate 43 is provided on one side of the pushing plate 42. A plurality of anti-slip rods 44 are symmetrically fixedly connected to the rear side of the resistance plate 43. The end of the anti-slip rod 44 away from the resistance plate 43 passes through the side wall of the pushing plate 42 and is fixedly connected to the anti-slip plate 45. A plurality of compensation springs 46 are fixedly connected between the resistance plate 43 and the pushing plate 42 and are sleeved on the outside of the anti-slip rod 44. A plurality of limit rods 47 are also fixedly connected to the side of the pushing plate 42 close to the resistance plate 43. A plurality of through holes are provided on the surface of the resistance plate 43 for the limit rods 47 to extend through. The outer wall of the fixed cylinder 31 is also provided with an embedding groove 48 for accommodating the pushing plate 42 and the resistance plate 43.

[0038] The impact action starting mechanism 5 is fixedly installed inside the impact crushing auxiliary mechanism 3 and is electrically connected to the impact crushing auxiliary mechanism 3. The impact action starting mechanism 5 includes a starting circular shell 51 fixedly installed on the inner wall of the fixed cylinder 31. A rotating shaft 52 is rotatably connected at the center of the inner wall of the starting circular shell 51. A starting motor 53 for driving the rotating shaft 52 to rotate is fixedly installed on the outer wall of the starting circular shell 51. A forward electric contact block 54 and a reverse electric contact block 55 are symmetrically fixedly installed on the inner wall of the starting circular shell 51. The shaft wall of the rotating shaft 52 is fixedly connected to an arc-shaped conductive block 56 that is in electrical contact with the forward electric contact block 54 and the reverse electric contact block 55.

[0039] The invalid operation alarm mechanism 6 is fixedly mounted on the support seat 1 and is used to feedback a warning signal to the staff when the impact crushing auxiliary mechanism 3 cannot handle the hard soil layer. The invalid operation alarm mechanism 6 includes a statistical shell 61 fixedly mounted on the upper end of the support seat 1. The internal sealing sleeve of the statistical shell 61 is provided with a movable piston 62. The side wall sealing sleeve of the statistical shell 61 is provided with an air pump 63. The side wall of the statistical shell 61 corresponding to the side of the air pump 63 is also fixedly provided with a pressure relief pipe 64. A solenoid valve 65 is installed on the pressure relief pipe 64. The side of the movable piston 62 away from the air pump 63 is fixedly connected to a transmission rack 66. A reset spring 67 arranged on the outside of the transmission rack 66 is fixedly connected between the movable piston 62 and the statistical shell 61. One end of the transmission rack 66 extends through the outside of the statistical shell 61. The inner wall of the statistical shell 61 is fixedly provided with a warning switch 68 arranged opposite to the movable piston 62.

[0040] The impact strength regulating mechanism 7 is fixedly mounted on the upper end of the support base 1 and is in transmission connection with the invalid operation alarm mechanism 6. The impact strength regulating mechanism 7 includes a potentiometer 71 and a reduction gear box 72 fixedly mounted on the upper end of the support base 1. The upper input end of the reduction gear box 72 is fixedly connected to a transmission gear 73 meshing with the transmission rack 66. The lower output end of the reduction gear box 72 is fixedly connected to the center of the rotating end of the potentiometer 71.

[0041] The operating principle of the present invention is now described as follows: when drilling, the support base 1 is first moved to the position to be drilled, and the support base 1 is fixed so that the support base 1 remains horizontal, thereby ensuring that the auger rod 10 remains vertical, and the lifting assembly 8 can drive the auger rod 10 and the drill bit 11 to move downward, and the drive motor 9 drives the auger rod 10 and the drill bit 11 to rotate at high speed, and the two cooperate to achieve efficient drilling work. The lifting assembly 8 here is the existing technology in the drilling device, and a screw lifting structure or a hydraulic lifting structure can be selected according to the actual drilling requirements, which will not be described in detail here;

[0042] During the drilling process, the drilling resistance encountered by the drill bit 11 will be confirmed by the torque sensor installed at the output end of the drive motor 9 and the pressure feedback from the pressure sensor 24 relative to the U-shaped connecting seat 21. When the torque value feedback from the torque sensor in the drive motor 9 is greater than 110% of the rated torque value, or the pressure feedback from the pressure sensor 24 is greater than 90% of the design value, the hard soil layer warning is activated. At this time, the PLC controller fixedly installed on the upper end of the support seat 1 controls the lifting component 8 and the drive motor 9 to adjust the working power, so that the speed of the spiral drill rod 10 driven by the drive motor 9 is reduced by 20%, and the feed speed of the lifting component 8 is reduced by 30%, to prevent the torque and pressure indicators from continuing to exceed the dangerous threshold and causing damage to the drill tool, thereby alleviating the drilling load of the hard soil layer, because the rated torque of the equipment is based on the standard The limit working value of the design is the working condition (such as soft soil layer), and a 10% safety margin needs to be retained in actual construction. When the torque reaches 110% of the rated value, it means that the cutting resistance of the drill bit 11 has exceeded the designed load-bearing capacity. Continuing to load may cause the auger rod 10 to break. When designing the pressurization system, a 10% peak buffer space is usually reserved. When the pressure reaches 90%, it indicates that the reaction force of the soil layer is close to the upper limit of the pressurization capacity of the drilling equipment. Continuing to force pressurize may cause damage to the lifting component 8. By reducing the rotation speed, the impact frequency between the drill bit 11 and the hard particles can be reduced, avoiding the drill bit 11 from breaking due to high-speed cutting. Reducing the feed speed can avoid the "energy accumulation effect", avoiding feeding too fast in the hard soil layer, which will cause the pressurization energy to be unable to be converted into drilling depth, and instead accumulate in the form of elastic potential energy, which can easily cause the drill bit 11 to suddenly "rush" and cause the hole to be tilted.

[0043] When the hardness of the current hard soil layer is too great to continue drilling, as the lifting assembly 8 continues to push the drill bit 11 downward to drill, the pressure value fed back by the pressure sensor 24 will continue to increase. When the pressurized pressure reaches 100% of the design value, the timing module in the PLC controller starts timing. When the drill bit 11 still cannot continue to drill deeper after 3 minutes, it is determined to be a "hard soil layer that needs to be impacted and broken". At this time, the PLC controller controls the lifting assembly 8 and the drive motor 9 to stop, so that the drill bit 11 remains relatively stationary. The PLC controller controls the electric push rod 41 to push the pushing plate 42 and the resistance plate 43 outward, so that the resistance plate 43 resists the inner wall of the borehole. As the pushing plate 42 continues to advance, The pushing plate 42 and the contact plate 43 will move relative to each other, so that the limiting rod 47 on the side wall of the pushing plate 42 extends out of the through hole on the side wall of the contact plate 43, so that the limiting rod 47 is further inserted into the hole wall, and the relative set position of the fixed cylinder 31 is fixed. After the fixing cylinder 31 is locked, the PLC controller controls the starting motor 53 to move. The starting motor 53 drives the arc-shaped conductive block 56 to continuously move in the starting shell 51 through the rotating shaft 52. When the arc-shaped conductive block 56 contacts the positive electric contact block 54, the positive power supply circuit of the positive and negative electromagnetic plates 37 is connected. At this time, the positive and negative electromagnetic plates 37 are energized toward one side of the force-bearing permanent magnet plate 36 to generate the same magnetism as the force-bearing permanent magnet plate 36, thereby applying a magnetic thrust to the impact plate 34, thereby causing the impact The plate 34 overcomes the elastic force of the return spring 35 to drive the impact rod 32 and the impact head 33 downward, so that the impact head 33 acts on the obstacle, and when the arc-shaped conductive block 56 contacts the reverse electric connection block 55, the reverse power supply circuit of the positive and negative electromagnetic plates 37 is connected, so that the positive and negative electromagnetic plates 37 are energized toward one side of the force-bearing permanent magnetic plate 36 to generate magnetism opposite to the force-bearing permanent magnetic plate 36, and then a magnetic attraction force is applied to the impact plate 34, driving the impact head 33 to reset and move, and then in the continuous contact and connection between the arc-shaped conductive block 56 and the positive electric connection block 54 and the reverse electric connection block 55, the impact crushing work of the impact head 33 on the obstacle is realized. This process lasts for 5 minutes. The return spring 35 here plays a role in ensuring the impact when the impact crushing work is not needed. The head 33 is not affected by the falling of gravity and the problem of drilling is solved. During the impact crushing work, the magnetic thrust received by the impact head 33 can ensure the completion of the impact crushing work, because the rotary drilling of the drilling work relies on the shear force generated by the rotation of the drill bit 11 to cut the soil layer. When encountering a hard soil layer, the shear strength of the soil layer exceeds the cutting capacity of the drill bit 11, resulting in a surge in torque and increased wear of the drill bit 11. The impact crushing generates a high-frequency impact force, which causes the impact head 33 to hit the hard soil layer with pulsed kinetic energy, and uses the crushing-splitting effect to destroy the soil structure. This method is more suitable for hard soil layers with high shear strength but low impact toughness. Impact crushing uses high-frequency impact kinetic energy to be transmitted through stress waves to cause cracks in the soil layer to expand, and the impact force directly acts on the crushing point, with high energy utilization.The stress wave generated instantly will form radial cracks inside the soil, breaking the originally intact hard soil structure into small pieces, which can more effectively destroy the hard soil layer. After the impact crushing work is completed, the PLC controller first controls the outward expansion auxiliary positioning mechanism 4 to move back and release the lock on the fixed cylinder 31. Then the PLC controller continues to control the lifting component 8 and the drive motor 9 to continue drilling. It determines whether the drilling work can continue based on the signals fed back by the torque sensor and the pressure sensor 24 in the drive motor 9. If the drilling work can continue, it means that the obstacle has been cleared. If the signal values ​​fed back by the torque sensor and the pressure sensor 24 in the drive motor 9 still reach the threshold, it means that the hard soil has not been cleared. The soil layer is effectively crushed. At this time, the PLC controller controls the expansion auxiliary positioning mechanism 4 and the impact crushing auxiliary mechanism 3 to work again, and performs a second crushing operation on the hard soil layer. When it is confirmed that the second crushing operation is required, the PLC controller synchronously controls the air pump 63 to work for 5s. The air pump 63 delivers a certain amount of air into the statistical shell 61, so that the air pressure on the rear side of the mobile piston 62 increases, so that the mobile piston 62 overcomes the elastic force of the return spring 67 and drives the transmission rack 66 to move a fixed distance. The meshing action of the transmission rack 66 and the transmission gear 73 drives the input end of the reduction gear box 72 to rotate, and then drives the rotating end of the potentiometer 71 to rotate through the output end of the reduction gear box 72, and the potentiometer 71 is connected in series with the starting motor 53. The power supply circuit of the starter motor 53 is a DC motor, and the potentiometer 71 is an electronic component that adjusts voltage or current by changing the resistance value. As the rotating end of the potentiometer 71 rotates, the access resistance of the potentiometer 71 becomes smaller, thereby increasing the power supply current of the starter motor 53, which in turn causes the starter motor 53 to operate at a higher driving speed during the second auxiliary crushing operation, thereby increasing the impact frequency of the impact head 33 on the obstacle, further increasing the intensity of the impact crushing. After completing the second impact crushing operation, the above-mentioned drilling steps are repeated to determine whether the obstacle has been cleared. If it has not been cleared, the PLC controller controls the outward expansion auxiliary positioning mechanism 4 and the impact crushing auxiliary mechanism 3 to continue the third impact crushing. The air pump 63 is controlled to work for 5 seconds, so that the moving piston 62 continues to move a fixed distance. At this time, the moving piston 62 presses the warning switch 68, indicating that the drilling work cannot be continued after the third impact crushing work. The signal is fed back to the staff in time to assist the staff in arranging and adjusting other construction plans more quickly. After the detection, the torque value fed back by the torque sensor in the drive motor 9 and the pressure value fed back by the pressure sensor 24 are used to judge that the obstacle is cleared. The PLC controller controls the solenoid valve 65 on the pressure relief pipe 64 to open, and uses the pressure relief pipe 64 to discharge the air injected into the statistical housing 61, and cooperates with the reset spring 67 to reset the moving piston 62 to its initial position.The movable piston 62 no longer presses the warning switch 68, cancels the alarm message, and allows the drilling process to continue. When further drilling is impossible, a moderate impact crushing force can be directly applied to the obstacle, effectively resolving minor drilling obstacles and avoiding the increased cost and reduced drilling efficiency caused by the direct use of large impact crushing equipment.

[0044] The above description is only a preferred embodiment of the present invention and is 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 scope of protection of the present invention.

Claims

1. A bridge pile foundation drilling device, comprising a support base (1), a lifting assembly (8) fixedly mounted on the upper end of the support base (1), a driving motor (9) fixedly connected to the movable end of the lifting assembly (8), a spiral drill rod (10) fixedly connected to the lower output end of the driving motor (9), and a drill bit (11) fixedly connected to the lower end of the spiral drill rod (10), characterized in that: Also includes: A pressurized connection mechanism (2) is fixedly mounted between the moving end of the lifting assembly (8) and the drive motor (9); An impact crushing auxiliary mechanism (3) is fixedly installed between the spiral drill rod (10) and the drill bit (11); Multiple groups of outward expansion auxiliary positioning mechanisms (4) are evenly embedded in the outer wall of the impact crushing auxiliary mechanism (3); An impact action starting mechanism (5) is fixedly mounted inside the impact crushing auxiliary mechanism (3) and is electrically connected to the impact crushing auxiliary mechanism (3); An invalid operation warning mechanism (6) is fixedly mounted on the support seat (1) and is used to feed back a warning signal to a worker when the impact crushing auxiliary mechanism (3) is unable to process the hard soil layer; An impact strength regulating mechanism (7) is fixedly mounted on the upper end of the support seat (1) and is in transmission connection with the invalid operation warning mechanism (6); The pressurized connection mechanism (2) includes a U-shaped connection seat (21) fixedly connected to the moving end of the lifting assembly (8), a connection plate (22) is fixedly sleeved on the outer wall of the driving motor (9), a plurality of fixed slide rods (23) are symmetrically fixedly connected to the inner wall of the U-shaped connection seat (21), a plurality of fixed slide holes are opened on the surface of the connection plate (22) and are slidably sleeved with the fixed slide rods (23), and a pressure sensor (24) is fixedly installed on the top of the inner wall of the U-shaped connection seat (21); The impact crushing auxiliary mechanism (3) includes a fixed cylinder (31) fixedly connected to the lower end of the spiral drill rod (10), the lower end of the fixed cylinder (31) is fixedly connected to the upper end of the drill bit (11), a plurality of vertically arranged impact rods (32) are movably inserted on the drill bit (11), the lower end of the impact rod (32) is fixedly connected to an impact head (33), the impact head (33) is embedded in the lower end of the drill bit (11), the upper end of the impact rod (32) is fixedly connected to an impact plate (34), a return spring (35) sleeved on the outside of the impact rod (32) is fixedly connected between the impact plate (34) and the drill bit (11), the upper end of the impact plate (34) is fixedly connected to a force-bearing permanent magnetic plate (36), and a positive and negative electromagnetic plate (37) arranged opposite to the force-bearing permanent magnetic plate (36) is fixedly installed on the top of the inner wall of the fixed cylinder (31); The impact action starting mechanism (5) comprises a starting round shell (51) fixedly mounted on the inner wall of the fixed cylinder (31); a rotating shaft (52) is rotatably connected to the center of the inner wall of the starting round shell (51); a starting motor (53) for driving the rotating shaft (52) to rotate is fixedly mounted on the outer wall of the starting round shell (51); a forward electric contact block (54) and a reverse electric contact block (55) are symmetrically fixedly mounted on the inner wall of the starting round shell (51); and an arc-shaped conductive block (56) in electrical contact with the forward electric contact block (54) and the reverse electric contact block (55) is fixedly connected to the shaft wall of the rotating shaft (52).

2. A bridge pile foundation drilling device according to claim 1, characterized in that: The outward expansion auxiliary positioning mechanism (4) includes an electric push rod (41) fixedly embedded in the outer wall of the fixed cylinder (31), the movable end of the electric push rod (41) is fixedly connected to a pushing plate (42), a side of the pushing plate (42) is provided with a contact plate (43), the rear side of the contact plate (43) is symmetrically fixedly connected to a plurality of anti-slip rods (44), the end of the anti-slip rod (44) away from the contact plate (43) passes through the side wall of the pushing plate (42), and is fixedly connected to the anti-slip plate (45 ), a plurality of compensation springs (46) sleeved on the outside of the anti-slip rod (44) are fixedly connected between the contact plate (43) and the pushing plate (42), a plurality of limiting rods (47) are fixedly connected to the side of the pushing plate (42) close to the contact plate (43), a plurality of through holes for the limiting rods (47) to extend through the surface of the contact plate (43), and an outer wall of the fixed cylinder (31) is further provided with an embedding groove (48) for accommodating the pushing plate (42) and the contact plate (43).

3. The bridge pile foundation drilling device according to claim 1, characterized in that: The invalid operation warning mechanism (6) comprises a statistical housing (61) fixedly mounted on the upper end of the support seat (1), an internal sealing sleeve of the statistical housing (61) is provided with a movable piston (62), a side wall sealing sleeve of the statistical housing (61) is provided with an air pump (63), a side wall of the statistical housing (61) corresponding to the air pump (63) is also fixedly provided with a pressure relief pipe (64), a solenoid valve (65) is provided on the pressure relief pipe (64), a side of the movable piston (62) away from the air pump (63) is fixedly connected with a transmission rack (66), a return spring (67) sleeved on the outside of the transmission rack (66) is fixedly connected between the movable piston (62) and the statistical housing (61), one end of the transmission rack (66) extends through the outside of the statistical housing (61), and a warning switch (68) arranged opposite to the movable piston (62) is fixedly provided on the inner wall of the statistical housing (61).

4. A bridge pile foundation drilling device according to claim 3, characterized in that: The impact strength regulating mechanism (7) comprises a potentiometer (71) and a reduction gear box (72) fixedly mounted on the upper end of the support seat (1); an upper input end of the reduction gear box (72) is fixedly connected to a transmission gear (73) meshing with a transmission rack (66); and a lower output end of the reduction gear box (72) is fixedly connected to the center of a rotating end of the potentiometer (71).

5. The bridge pile foundation drilling device according to claim 1, characterized in that: A counterweight (12) is also fixedly mounted on the side of the moving end of the lifting assembly (8) away from the drive motor (9).

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