Rectangular hole drilling equipment

Abstract

The invention discloses rectangular hole drilling equipment which comprises a mechanical lock telescopic drill rod, an upper power head, a pipe coiling device, a lower power head driving system and a differential mechanism driving system. The mechanical lock telescopic drill rod comprises a rod body, and a rod head is arranged at the top of the rod body. The upper power head sleeves the surface of the rod body at the lower end of the rod head; according to the equipment, the mode that an upper power head driving system and a lower power head driving system cooperatively work is adopted, and a differential mechanism driving system is combined to efficiently drive a side milling wheel and a bottom drilling bit, so that synchronous operation of positioning drilling of the bottom drilling bit and side milling drilling of the side milling wheel is achieved, and the drilling time of a rectangular pile hole is greatly shortened; the rectangular hole drilling equipment is reasonable in structural design, the efficient drilling function of a rectangular pile is achieved, and the construction cost is reduced; and through synchronous tunneling of the bottom drilling bit and the side milling wheel, the cross section of the rectangular hole is regular, the drilling quality of the rectangular pile hole is improved, and the rectangular pile hole drilling device is suitable for rectangular pile hole drilling construction in geotechnical engineering.

Description

Technical Field

[0001] The invention relates to the technical field of pile hole drilling in construction engineering, in particular to rectangular hole drilling equipment. Background Art

[0002] In construction engineering, rectangular pile holes are widely used in bridges, high-rise buildings, and especially in foundation engineering such as mountain slope support. Currently, the known methods for drilling rectangular pile holes include:

[0003] 1. Impact drilling;

[0004] 2. The grab is made into a hole;

[0005] 3. Double wheel slot milling machine to form holes;

[0006] 4. Manual digging;

[0007] 5. Drill one or more round holes first, and then expand them into square holes;

[0008] The advantages and disadvantages of the above methods are as follows:

[0009] 1. Impact drill: It can drill into various strata, but its efficiency is very low, and mud is required during the drilling process. Under certain engineering conditions, especially in the support engineering of water-sensitive slopes, this will cause great safety hazards to the stability of the slope;

[0010] 2. Grab bucket: only suitable for soft ground;

[0011] 3. Double-wheel slot milling machine: Mud must be used during excavation. Under certain engineering conditions, especially in the support of water-sensitive slopes, this will pose a great safety hazard to the stability of the slope, and the equipment cost and operating cost are very high;

[0012] 4. Manual digging: slow speed, high safety risk, and water-containing slopes need to be pumped out, which poses even greater safety risks;

[0013] 5. Repair and expand into square holes: It is necessary to drill one or more round holes within the cross-section of the square hole first, and then use a hole repair device to repair and expand. The drilling debris during the repair and expansion will fall into the hole, and then a round hole drill bit is used to remove the debris and clean the hole. It is necessary to switch between the drilling and repair and expansion processes many times. The verticality of each drill hole is difficult to ensure. The process is complicated, the efficiency is low, the cross-section of the hole is irregular, and the sediment at the bottom of the hole cannot be cleaned cleanly.

[0014] The above square hole drilling methods have the following problems: the drilling efficiency of the drilling equipment is low during use, resulting in a long construction period, or high cost of use, complex maintenance, or complicated procedures and poor hole quality, or great safety hazards, or are restricted by engineering conditions, etc., and cannot meet the engineering requirements well.

[0015] For this purpose, we have launched a rectangular hole drilling equipment. Summary of the Invention

[0016] The object of the present invention is to provide a rectangular hole drilling device to solve the problems raised in the above background technology.

[0017] To achieve the above object, the present invention provides the following technical solution: A rectangular hole drilling device, comprising: a machine-locked telescopic drill rod, an upper power head, a pipe reel device, a lower power head drive system and a differential drive system;

[0018] The machine-locked telescopic drill rod comprises a rod body, and a rod head is provided on the top of the rod body;

[0019] The rod head is located at the top of the rod body, a design that lays the foundation for coordinated operation with other components. The mechanically locked telescopic drill rod must not only be high-strength to withstand the various stresses during drilling, but also maintain structural stability to ensure normal operation even in complex operating environments.

[0020] The upper power head sleeve is arranged on the surface of the rod body at the lower end of the rod head, and the center of the upper power head is provided with a machine lock telescopic drill rod driving sleeve and a mounting bracket;

[0021] The pipe reel device is arranged at the bottom of the upper power head, and the pipe reel device includes a pipe reel device bracket and a pipe reel, the pipe reel reel is wound with an oil pipe chain, and the pipe reel reel is installed on the pipe reel device bracket. The upper end of the pipe reel device bracket is connected to the lower end of the installation bracket located on the upper power head, so that the pipe reel device is fixed to the bottom of the upper power head;

[0022] The mounting bracket securely secures the upper power head to prevent displacement or shaking during operation. The hose reel incorporates an automatic retraction mechanism that automatically adjusts the length of the mechanically locked telescopic drill rod during drilling, based on the actual drilling depth and requirements. This feature significantly improves operational convenience and automation, reduces manual intervention, and ensures the mechanically locked telescopic drill rod maintains optimal operating conditions throughout the drilling phase. Furthermore, a power transmission pipe is located on one side of the hose reel bracket, which plays the crucial role of transmitting power.

[0023] The lower power head drive system includes a square sleeve, which is sleeved with the end square head of one side of the machine lock telescopic drill rod, and a protective plate is provided at the lower end of the square sleeve;

[0024] A protective plate is installed at the lower end of the square sleeve. This protects the key components of the lower drive system during drilling, preventing damage from rock impacts, debris entanglement, and other potential problems during drilling, thereby extending the equipment's service life. The lower drive system is also equipped with a hydraulic drive mechanism that provides stable and powerful drilling power, ensuring smooth drilling operations in diverse geological conditions.

[0025] The differential drive system is connected to the lower power head drive system, the side output end of the differential drive system is provided with a side milling wheel, and the bottom output end of the differential drive system is provided with a bottom drilling bit;

[0026] The differential drive system, powered by the lower drive unit through the power transmission pipes, drives the side milling wheels and bottom drilling bit in synchronous operation. In practice, the side milling wheels mill the sides of the rectangular pile hole, creating a more regular shape, while the bottom drilling bit focuses on drilling downwards. These two work together to efficiently complete the drilling of the rectangular pile hole. The design of the differential drive system requires careful consideration of power distribution to ensure that both the side milling wheels and bottom drilling bit receive appropriate power output to meet different operational requirements.

[0027] A hydraulic drive device is provided on one side of the surface of the mounting bracket, and the upper power head drives the machine-locked telescopic drill rod to rotate through the hydraulic drive device. A power transmission pipe is provided on one side of the pipe reel device bracket at one end of the oil pipe chain. The lower power head drive system is connected to the pipe reel device through the power transmission pipe, and drives the differential drive system to drive the side milling wheel and the bottom drilling drill bit to work synchronously to complete the drilling operation of the rectangular pile hole.

[0028] The drive sleeve for the telescopic drill rod is fitted with a worm gear on one end. The two sides of the worm gear mesh with the hydraulic drive unit. When the hydraulic drive unit is activated, the transmission between the worm gear and the hydraulic drive unit precisely and efficiently drives the telescopic drill rod, providing the initial power source for the entire drilling operation. The design of the upper power head must balance the stability of power transmission and the precision of control over the telescopic drill rod to ensure reliable operation under various drilling conditions.

[0029] Preferably, a driving worm gear is provided outside the circumference of the driving sleeve of the machine-locked telescopic drill rod, and hydraulic driving devices are engaged on both sides of the driving worm gear to drive the machine-locked telescopic drill rod to rotate.

[0030] Preferably, the tubing reel device includes an automatic retracting and releasing mechanism, and the automatic retracting and releasing mechanism is used to automatically adjust the length of the tubing chain released by the tubing reel during drilling so as to synchronize the retracting and releasing of the machine-locked retractable drill rod.

[0031] Preferably, the lower power head drive system includes a hydraulic drive mechanism, and the hydraulic drive mechanism is used to provide stable drilling power.

[0032] Preferably, the square sleeve and the square head are connected via a positioning pin, and the positioning pin is used to fix the square sleeve and the square head together.

[0033] Preferably, a groove is provided on the surface of the rod body, and the groove and the rod body are integrally formed.

[0034] Preferably, a protrusion is provided within the circumference of the machine-locked telescopic drill rod driving sleeve, and the protrusion is engaged with the groove and is used for limiting the position during movement.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) The equipment adopts the cooperative working mode of the upper power head and the lower power head drive system, combined with the efficient drive of the side milling wheel and the bottom drilling bit by the differential drive system, and realizes the synchronous operation of the bottom drilling bit positioning drilling and the side milling drilling of the side milling wheel, which greatly shortens the drilling time of the rectangular pile hole, significantly improves the drilling efficiency, effectively shortens the construction period, and can meet the construction progress requirements of large-scale construction projects;

[0037] (2) The rectangular hole drilling equipment has a reasonable structural design and an optimized combination of various components, which achieves efficient drilling function. The components of the equipment are relatively common and easy to manufacture and maintain, which reduces the overall manufacturing cost of the equipment. At the same time, due to the improvement of drilling efficiency, the use time and rental cost of the equipment are reduced, further reducing the construction cost;

[0038] (3) The differential drive system can independently control the speed and direction of the side milling wheel and the bottom drilling bit, and can be precisely adjusted according to different geological conditions and construction requirements. The cutting edge of the side milling wheel can be adjusted in angle to adapt to rectangular pile holes of different sizes, ensuring the dimensional accuracy and shape accuracy of the rectangular pile holes. In addition, the overall stability of the equipment and the precise positioning of the locating pin shaft on the square sleeve and square head effectively avoid deviations during the drilling process, improve the drilling quality of the rectangular pile hole, and meet the high-precision requirements of the construction project for pile foundations. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0040] Figure 2 It is a schematic structural diagram of the side section of the present invention;

[0041] Figure 3 This is a schematic structural diagram of the machine-locked telescopic drill rod of the present invention;

[0042] Figure 4 This is a schematic structural diagram of the pipe reel support and the power transmission pipe arrangement of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the mounting bracket of the present invention.

[0044] In the figure: 1. Machine-locked telescopic drill rod; 2. Upper power head; 3. Hose reel; 4. Lower power head drive system; 5. Side milling wheel; 6. Bottom drilling bit; 7. Rod head; 8. Rod body; 9. Groove; 10. Machine-locked telescopic drill rod drive sleeve; 11. Bump; 12. Drive worm gear; 13. Hydraulic drive device; 14. Mounting bracket; 15. Hose reel bracket; 16. Square head; 17. Square sleeve; 18. Protective plate; 19. Positioning pin; 20. Power transmission pipe; 21. Differential drive system; 22. Hose reel; 23. Oil pipe chain. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] See also Figure 1-5 The present invention provides a technical solution: a rectangular hole drilling device, comprising: a machine-locked telescopic drill rod 1, wherein the machine-locked telescopic drill rod 1 comprises a rod body 8, and a rod head 7 is provided on the top of the rod body 8;

[0047] The top of the rod body 8 is equipped with a rod head 7, which lays the foundation for the coordinated operation of other components. The mechanical lock telescopic drill rod 1 not only needs to be high-strength to withstand the various stresses during drilling, but also needs to ensure its structural stability to ensure normal operation in complex working environments.

[0048] The upper power head 2 is sleeved on the surface of the rod body 8 at the lower end of the rod head 7. The center of the upper power head 2 is provided with a machine lock telescopic drill rod driving sleeve 10 and a mounting bracket 14;

[0049] A pipe reel 3 is provided at the bottom of the upper power head 2 and includes a pipe reel bracket 15 and a pipe reel 22. A pipe chain 23 is wound around the pipe reel 22. The pipe reel 22 is mounted on the pipe reel bracket 15. The upper end of the pipe reel bracket 15 is connected to the lower end of the mounting bracket 14 located on the upper power head 2, thereby fixing the pipe reel 3 to the bottom of the upper power head 2.

[0050] The function of the mounting bracket 14 is to firmly secure the upper power head 2 to prevent displacement or shaking during operation. The hose reel 3 is internally provided with an automatic retraction mechanism. During the drilling process, this mechanism can automatically adjust the length of the mechanically locked telescopic drill rod 1 according to the actual drilling depth and requirements. This function greatly improves the convenience and automation of the operation, reduces manual intervention, and also ensures that the mechanically locked telescopic drill rod 1 can maintain optimal working conditions at different drilling stages. In addition, a power transmission pipe 20 is also provided on one side of the hose reel bracket 15, which bears the important responsibility of transmitting power.

[0051] The lower power head drive system 4 includes a square sleeve 17, which is sleeved with the end square head 16 of one side of the machine-locked telescopic drill rod 1, and a protective plate 18 is provided at the lower end of the square sleeve 17;

[0052] A protective plate 18 is installed at the lower end of the square sleeve 17. This protects the key components of the lower power head drive system 4 during drilling, preventing damage to the equipment due to rock impacts, debris entanglement, etc., thereby extending the equipment's service life. The lower power head drive system 4 is also equipped with a hydraulic drive mechanism that provides stable and powerful drilling power, ensuring that the entire equipment can successfully perform drilling operations in various geological conditions.

[0053] A differential drive system 21, the differential drive system 21 is connected to the lower power head drive system 4, a side milling wheel 5 is provided at the side output end of the differential drive system 21, and a bottom drilling drill bit 6 is provided at the bottom output end of the differential drive system 21;

[0054] Power is transmitted from the lower drive head drive system 4 via the power transmission pipe 20, and the differential drive system 21 drives the side milling wheels 5 and the bottom drilling bit 6 to operate synchronously. In actual operation, the side milling wheels 5 are responsible for milling the sides of the rectangular pile hole, giving it a more regular shape, while the bottom drilling bit 6 focuses on drilling downwards. The two work together to efficiently complete the drilling of the rectangular pile hole. The design of the differential drive system 21 requires full consideration of the rationality of power distribution to ensure that both the side milling wheels 5 and the bottom drilling bit 6 receive appropriate power output to meet different operational requirements.

[0055] A hydraulic drive device 13 is provided on one side of the surface of the installation bracket 14, and the upper power head 2 drives the machine-locked telescopic drill rod 1 to rotate through the hydraulic drive device 13. A power transmission pipe 20 is provided on one side of the pipe reel device bracket 15 at one end of the oil pipe chain 23. The lower power head drive system 4 is connected to the pipe reel 3 through the power transmission pipe 20, and drives the differential drive system 21 to drive the side milling wheel 5 and the bottom drilling drill bit 6 to work synchronously to complete the drilling operation of the rectangular pile hole.

[0056] The telescopic drill rod drive sleeve 10 is equipped with a drive worm gear 12 on its outer circumference. Both sides of the drive worm gear 12 engage with a hydraulic drive unit 13. When the hydraulic drive unit 13 is activated, the transmission between the drive worm gear 12 and the hydraulic drive unit 13 accurately and efficiently drives the telescopic drill rod 1 to rotate, providing the initial power source for the entire drilling operation. The design of the upper power head 2 must balance the stability of power transmission and the precision of control over the telescopic drill rod 1 to ensure reliable operation under various drilling conditions.

[0057] A driving worm gear 12 is provided on the outer circumference of one end of the mechanical lock telescopic drill rod driving sleeve 10 , and hydraulic driving devices 13 are engaged on both sides of the driving worm gear 12 for driving the mechanical lock telescopic drill rod 1 to rotate.

[0058] The pipe reel device 3 includes an automatic retracting and releasing mechanism, and the automatic retracting and releasing mechanism is used to automatically adjust the length of the oil pipe chain 23 released by the pipe reel 22 during the drilling process to synchronize the extension and retraction of the machine-locked telescopic drill rod 1.

[0059] The lower power head drive system 4 includes a hydraulic drive mechanism, and the hydraulic drive mechanism is used to provide stable drilling power.

[0060] The square sleeve 17 and the square head 16 are connected via a positioning pin 19 , and the positioning pin 19 is used to fix the square sleeve 17 and the square head 16 together.

[0061] A groove 9 is provided on the surface of the rod body 8 , and the groove 9 and the rod body 8 are integrally formed.

[0062] A protrusion 11 is provided within the circumference of the mechanical lock telescopic drill rod driving sleeve 10, and the protrusion 11 is engaged with the groove 9 and is used for limiting the position during movement.

[0063] Specifically, during use, when drilling a rectangular hole, the hydraulic drive device 13 on one side of the surface of the mounting bracket 14 starts to work, and the power output end of the hydraulic drive device 13 engages with the drive worm gear 12 outside the circumference of the machine-lock telescopic drill rod drive sleeve 10, and the hydraulic energy is converted into mechanical energy to drive the worm gear 12 to rotate. Since the protrusion 11 within the circumference of the machine-lock telescopic drill rod drive sleeve 10 and the groove 9 on the surface of the rod body 8 of the machine-lock telescopic drill rod 1 are engaged with each other, the rotation of the machine-lock telescopic drill rod drive sleeve 10 will drive the machine-lock telescopic drill rod 1 to rotate synchronously. This connection method ensures the stability and reliability of power transmission, so that the machine-lock telescopic drill rod 1 can obtain sufficient torque to perform drilling operations;

[0064] When the machine-locked telescopic drill rod 1 rotates, its end square head 16 drives the lower power head square sleeve 17 connected to it to rotate, thereby adjusting the angle of the lower power head to meet the requirements of different construction angles. The hydraulic drive mechanism of the lower power head drive system 4 provides stable drilling power, which is transmitted to the pipe reel 3 through the power transmission pipe 20. The pipe reel 3 plays the role of power transfer and regulation. It transmits the received power to the lower power head drive system 4 again, ensuring that the power can be continuously and stably supplied to the subsequent working parts.

[0065] After obtaining power, the lower power head drive system 4 drives the differential drive system 21 connected thereto to work. The differential drive system 21 first drives the bottom drilling bit 6 at the bottom output end to start working. The bottom drilling bit 6 drills a circular pile in the ground. This circular pile plays a positioning role and provides a reference for the precise drilling of the subsequent rectangular pile hole. During the drilling process, the bottom drilling bit 6 discharges the cut soil to ensure smooth drilling.

[0066] After the bottom drilling bit 6 completes the positioning drilling, the differential drive system 21 starts to drive the side milling wheel 5 at the side output end to work. The side milling wheel 5 performs side milling drilling around the positioned circular pile. Through rotation and cutting action, the periphery of the circular pile is gradually cut into a rectangular shape. The differential drive system 21 can independently control the speed and direction of the side milling wheel 5 and the bottom drilling bit 6. According to different geological conditions and construction requirements, their working states can be flexibly adjusted to ensure efficient and accurate completion of the rectangular pile hole drilling operation.

[0067] During the drilling process, as the drilling depth increases or decreases, the automatic retraction and extension mechanism of the pipe reel device 3 begins to play a role. It will automatically adjust the length of the machine-locked telescopic drill rod 1 according to the actual drilling depth requirement. When the drilling depth needs to be increased, the automatic retraction and extension mechanism extends the machine-locked telescopic drill rod 1; when the drilling depth needs to be reduced or the drilling tool needs to be lifted, the automatic retraction and extension mechanism retracts the machine-locked telescopic drill rod 1, ensuring that the machine-locked telescopic drill rod 1 can always maintain an appropriate working length to meet the drilling requirements of rectangular pile holes of different depths.

[0068] The protective plate 18 provided at the lower end of the lower power head square sleeve 17 can effectively protect the lower power head drive system 4 and the differential drive system 21 from damage by debris and mud generated during the drilling process, thereby extending the service life of the equipment. The mounting bracket 14 fixes the entire set of equipment on an external machine to ensure the overall stability of the equipment during the drilling process, and avoid factors such as vibration and shaking that affect the drilling accuracy and construction safety.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rectangular hole drilling device, characterized in that: include: A machine-locked telescopic drill rod (1), the machine-locked telescopic drill rod (1) comprising a rod body (8), a rod head (7) being provided at the top of the rod body (8); An upper power head (2), the upper power head (2) is sleeved on the surface of the rod body (8) at the lower end of the rod head (7), and the upper power head (2) is provided with a machine-locked telescopic drill rod driving sleeve (10) and a mounting bracket (14); A pipe reel (3), the pipe reel (3) being arranged at the bottom of the upper power head (2), the pipe reel (3) comprising a pipe reel bracket (15) and a pipe reel disc (22), an oil pipe chain (23) being wound around the pipe reel disc (22), the pipe reel disc (22) being mounted on the pipe reel bracket (15), the upper end of the pipe reel bracket (15) being connected to the lower end of the mounting bracket (14) located on the upper power head (2), thereby fixing the pipe reel (3) to the bottom of the upper power head (2); A lower power head drive system (4), the lower power head drive system (4) comprising a square sleeve (17), the square sleeve (17) being sleeved with the end square head (16) on one side of the machine-locked telescopic drill rod (1), and a protective plate (18) being provided at the lower end of the square sleeve (17); A differential drive system (21), the differential drive system (21) being connected to the lower power head drive system (4), a side milling wheel (5) being provided at a side output end of the differential drive system (21), and a bottom drilling bit (6) being provided at a bottom output end of the differential drive system (21); A hydraulic drive device (13) is provided on one side of the surface of the mounting bracket (14), and the upper power head (2) drives the machine-locked telescopic drill rod (1) to rotate through the hydraulic drive device (13). A power transmission pipe (20) is provided on one side of the pipe reel bracket (15) at one end of the oil pipe chain (23). The lower power head drive system (4) is connected to the pipe reel (3) through the power transmission pipe (20), and drives the differential drive system (21) to drive the side milling wheel (5) and the bottom drilling drill bit (6) to work synchronously, thereby completing the drilling operation of the rectangular pile hole.

2. The rectangular hole drilling equipment according to claim 1, characterized in that: A driving worm gear (12) is provided on the outer periphery of one end of the machine-lock telescopic drill rod driving sleeve (10), and hydraulic driving devices (13) are engaged on both sides of the driving worm gear (12) for driving the machine-lock telescopic drill rod (1) to rotate.

3. The rectangular hole drilling equipment according to claim 1, characterized in that: The pipe reel device (3) includes an automatic retracting and releasing mechanism, and the automatic retracting and releasing mechanism is used to automatically adjust the length of the oil pipe chain (23) released by the pipe reel (22) during the drilling process to synchronize the retracting and releasing of the machine-locked telescopic drill rod (1).

4. The rectangular hole drilling equipment according to claim 1, characterized in that: The lower power head drive system (4) comprises a hydraulic drive mechanism, and the hydraulic drive mechanism is used to provide stable drilling power.

5. The rectangular hole drilling equipment according to claim 1, characterized in that: The square sleeve (17) and the square head (16) are connected via a positioning pin (19).

6. The rectangular hole drilling equipment according to claim 1, characterized in that: A groove (9) is provided on the surface of the rod body (8).

7. The rectangular hole drilling equipment according to claim 6, characterized in that: A convex block (11) is provided within the circumference of the machine-locked telescopic drill rod driving sleeve (10), and the convex block (11) and the groove (9) are engaged with each other.

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