Piling device for municipal engineering construction

Abstract

The invention discloses a piling device for municipal engineering construction, and relates to the technical field of municipal construction. Comprising an engineering vehicle, a roll-over stand set, a traction mechanism and a rotary piling assembly, the roll-over stand set is arranged on the vehicle to bear the piling assembly to turn over, and the traction mechanism controls the piling assembly to move axially. The device further comprises a discharging module, a locking module and an air blowing module. The discharging module is arranged on the periphery of the overturning frame group in a sleeving manner, and is matched with the external expansion cylinder through a guide cylinder to form a closed sludge discharging channel and directionally guide sludge; the air blowing module is connected with the discharging module, and air flow is used for assisting in sludge discharging and dissipating heat of the heating part of the rotary piling assembly. The problems that in the prior art, due to sludge accumulation and drill pasting, the power load is large, and equipment is prone to overheating faults are effectively solved, it is guaranteed that the operation site is clean and tidy, the piling efficiency is greatly improved, and the service life of the equipment is greatly prolonged.

Description

Technical Field

[0001] This invention relates to the field of municipal construction technology, and in particular to a piling device for municipal engineering construction. Background Technology

[0002] Municipal engineering construction is the foundation of modern urban construction and development, encompassing multiple important areas such as road and bridge construction, underground pipeline laying, and foundation reinforcement of various buildings. In these projects, pile foundation construction is often necessary to ensure the long-term stability and safety of structures. This involves using specialized machinery to drive or screw piles into the ground to enhance the bearing capacity of the foundation. As the core construction equipment for this process, the performance of the pile driving device directly determines the quality and progress of foundation treatment. Therefore, an efficient, stable, and adaptable pile driving device has wide application needs and significant practical value in municipal engineering construction in various geological environments, including soft soil, clay, and sand.

[0003] Existing spiral pile drivers typically consist of a pile frame, a power head, and a spiral drill rod connected below the power head. The power system drives the spiral drill rod to rotate, using spiral blades on the drill rod to cut and lift the soil, thus forming a pile hole in the ground. This type of equipment has a relatively mature structure and, by utilizing the spiral propulsion principle, solves to some extent the construction problems of traditional pile driving methods, and is widely used in various building and municipal foundation construction sites.

[0004] However, the aforementioned existing technologies still have significant drawbacks in actual construction operations. Specifically, when the piling machine operates in soil environments with high viscosity or high water content, as the drill rod penetrates deeper, the excavated wet and heavy sludge cannot be smoothly discharged and easily accumulates in large quantities at the drill rod and pile hole opening. Simultaneously, this sludge adheres tightly to and coats the surface of the drill rod and spiral blades, causing a "drill sticking" phenomenon. This not only severely obstructs the soil discharge channel but also greatly increases the frictional resistance and torque during drill rod rotation. This abnormal resistance directly leads to a huge additional load on the equipment's power system, making the equipment difficult to operate, significantly reducing the hole formation effect and construction efficiency of the piling operation. Furthermore, under prolonged high-load conditions, the power components are prone to failure due to overheating or overload, shortening the equipment's service life. Summary of the Invention

[0005] Technical problems to be solved When existing spiral pile drivers operate in cohesive or high-moisture soil environments, the excavated sludge tends to accumulate at the drill rod and pile hole opening, adhering to the surface of the drill rod and spiral blades. This leads to obstruction of the soil discharge channel, increased frictional resistance and torque during drill rod rotation, resulting in excessive load on the power system, susceptibility to overheating and malfunctions, low construction efficiency, and shortened equipment lifespan.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: A piling device for municipal engineering construction includes an engineering vehicle, a tilting frame assembly, a traction mechanism, and a rotating piling component. The tilting frame assembly is mounted on the engineering vehicle and is used to support and control the tilting of the rotating piling component. The rotating piling component is used for helical piling and is located inside the tilting frame assembly. The traction mechanism is mounted on the engineering vehicle and connected to the traction mechanism inside the tilting frame assembly. The traction mechanism can cooperate with the gravity of the tilting frame assembly to control the movement of the piling component inside the tilting frame assembly along the axial direction of the tilting frame assembly. The device also includes hydraulic support legs and a level detection and control instrument. The hydraulic support legs are respectively located on the engineering vehicle. The sidewalls are used for support. The horizontal detection and control instrument is installed on the engineering vehicle and electrically connected to the hydraulic support legs. It also includes a discharge module, a locking module, and an air blowing module. The discharge module is sleeved on the periphery of the tilting frame assembly and is used to guide and transport the sludge during piling in cooperation with the tilting frame assembly. The locking module is located on the outer wall of the discharge module and is used to abut against the rotating piling assembly. The air blowing module is installed on the discharge module and communicates with the interior of the discharge module. The air blowing module can clean the tilting frame assembly with air and can dissipate heat from the heat-generating parts of the rotating piling assembly.

[0007] Preferably, the tilting frame assembly includes a main frame, a support frame, hydraulic cylinders, and a support frame. The main frame is mounted on the engineering vehicle and has a long, narrow frame structure. The support frame is mounted on the rear of the engineering vehicle, and its top end is hinged to the middle section of the main frame near the rear. Two sets of hydraulic cylinders are hinged to the top of the engineering vehicle, and the free ends of both sets of hydraulic cylinders are hinged to the middle section of the traction mechanism. A support frame that can support the main frame is mounted on the top of the engineering vehicle near the front.

[0008] Preferably, the traction mechanism includes a take-up roller, a geared motor, a traction cable, a guide pulley, a guide rod, and a slide. A take-up roller is installed on the top of the engineering vehicle near the rear end. A geared motor with an output shaft connected to the shaft end of the take-up roller is installed on the take-up roller via a coupling. The traction cable is wound and connected to the take-up roller. Guide rods are installed in the main frame, distributed along its axial direction and connecting its two ends. A slide is slidably sleeved on the guide rod. A guide pulley is installed on the end face of the main frame away from its hinge point with the support frame. The traction cable is wound around the guide pulley and passes through the main frame to connect with the slide.

[0009] Preferably, the rotary piling assembly includes a sub-frame, a drill rod, and a drive motor. The sub-frame is installed on the side of the main frame away from the engineering vehicle. The drill rod for helical piling is rotatably connected to the side wall of the slide near the rear of the engineering vehicle. The drive motor is installed on the slide, and the output shaft of the drive motor is connected to the end of the drill rod through a coupling.

[0010] Preferably, the discharge module includes a guide cylinder, an outer expansion cylinder A, and an outer expansion cylinder B. The guide cylinder is detachably sleeved around the drill rod, and a channel is formed between the guide cylinder and the drill rod for the sludge spun out during the helical piling process to pass through. The top end face of the guide cylinder is integrally formed with an outwardly curved outer expansion cylinder A, and the bottom end face of the guide cylinder is integrally formed with an outwardly curved outer expansion cylinder B. The outer expansion cylinder B can overlap with the ground and cover the part of the drill rod that contacts the ground.

[0011] Preferably, the discharge module further includes a guide plate and a baffle. The guide plate, which has a U-shaped cross-section and is inclined toward the rear of the engineering vehicle, is integrally formed on the outer wall of the guide cylinder. The guide plate is used to collect, transport and guide the sludge that is spun out through the guide cylinder and the outer expansion cylinder A. The baffle is integrally formed on the end face of the guide plate near the engineering vehicle.

[0012] Preferably, the air blowing module includes a mounting base, an air pump, a connecting pipe, and a heat-conducting ring. The mounting base is installed on the outer wall of the guide cylinder near the outer expansion cylinder B. The air pump is installed on the mounting base. The output end of the air pump is connected to the connecting pipe. The end of the connecting pipe is connected to the inside of the guide cylinder. A heat-conducting ring is installed at the bottom of the slide table. The heat-conducting ring is located around the drill rod. The inner ring of the heat-conducting ring is provided with air holes. The input end of the air pump can be connected to the heat-conducting ring through a hose.

[0013] Preferably, the locking module includes an internal threaded cylinder, an external threaded column, a chuck, and a nut. Multiple sets of internal threaded cylinders are symmetrically arranged on the outer wall of the guide cylinder. The internal threaded cylinder is internally threaded and connected to the external threaded column. The end of the external threaded column away from the guide cylinder is rotatably connected to a chuck that can be engaged with the sub-frame. A nut is welded to the middle section of the outer wall of the external threaded column.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention effectively solves the problem of sludge accumulation at the borehole opening during drilling operations by setting a discharge module around the rotary piling assembly and utilizing the cooperation of a guide cylinder, an outer expansion cylinder, and a guide plate. During construction, a closed soil discharge channel is formed between the guide cylinder and the drill rod, and the bottom outer expansion cylinder B can cover the ground opening, preventing sludge from falling back or overflowing around the opening. As the drill rod rotates and rises, the wet and heavy sludge is confined within the guide cylinder and then directionally transported to a position away from the rear of the construction vehicle via the top outer expansion cylinder A and the inclined guide plate. This structure not only achieves orderly sludge discharge, preventing sludge from clogging the drill rod channel, but also prevents sludge from contaminating the vehicle body, ensuring a clean work site and continuous construction capability.

[0015] This invention significantly reduces the load on the power system through the synergistic effect of the air-blowing module and the emission module, solving the problem of "drill sticking" caused by the easy adhesion of cohesive soil to the drill rod. The air pump in the air-blowing module injects high-pressure gas into the guide cylinder through the connecting pipe, forming an upward airflow in the narrow channel between the guide cylinder and the drill rod. This airflow not only helps to lift the wet and heavy sludge, reducing the adhesion and frictional resistance between the sludge and the drill rod blades, but also plays a certain role in airflow stripping and cleaning the surface of the drill rod. This greatly reduces the torque consumption of the drive motor during the lifting and rotation process, improving the hole-forming efficiency and smoothness of the piling operation.

[0016] This invention utilizes a heat-conducting ring design in the air-blowing module to effectively solve the problem of overheating during long-term high-load operation of the equipment, thus extending its service life. The heat-conducting ring is installed at the bottom of the slide table and located in the core heat-generating area around the drill rod. The input end of the air pump is connected to the heat-conducting ring via a hose, allowing the air pump to draw hot air from the vicinity of the heat-conducting ring during operation, forming an active heat dissipation circulation. This design, on the one hand, promptly removes the heat generated at the connection between the drive motor and the drill rod due to intense friction and high-load operation, preventing overheating damage to components; on the other hand, the extracted waste heat gas is pressurized by the air pump and discharged into the guide cylinder for mud removal, achieving heat energy recovery and utilization with dual functions, ensuring the stable operation of the device for a long time under harsh working conditions. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a perspective view of the present invention; Figure 2 This is structural diagram A of the emission module of the present invention; Figure 3 This is a bottom view of the present invention; Figure 4 This is an enlarged view of part A of the present invention; Figure 5 This is diagram B of the emission module structure of the present invention; Figure 6 This is a top view of the present invention; Figure 7 This is a front view of the present invention.

[0018] Reference numerals: 1. Engineering vehicle; 2. Tilting frame assembly; 21. Main frame; 22. Support frame; 23. Hydraulic cylinder; 24. Support frame; 3. Traction mechanism; 31. Winding roller; 32. Gear motor; 33. Traction cable; 34. Guide pulley; 35. Guide rod; 36. Slide table; 4. Rotary piling assembly; 41. Sub-frame; 42. Drill rod; 43. Drive motor; 5. Discharge module; 51. Guide cylinder; 52. Outer expansion cylinder A; 53. Outer expansion cylinder B; 54. Guide plate; 55. Baffle; 6. Hydraulic support leg; 7. Locking module; 71. Internal threaded cylinder; 72. External threaded column; 73. Claw; 74. Nut; 8. Air blowing module; 81. Mounting seat; 82. Air pump; 83. Connecting pipe; 84. Heat-conducting ring; 9. Horizontal detection and control instrument. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example Please see Figures 1 to 7 The present invention provides a piling device for municipal engineering construction, which mainly includes an engineering vehicle 1, a tilting frame group 2, a traction mechanism 3, a rotating piling assembly 4, a discharge module 5, a hydraulic support leg 6, a locking module 7, an air blowing module 8, and a level detection and control instrument 9.

[0021] like Figure 1 and Figure 3 As shown, the engineering vehicle 1 serves as the mobile carrier of the entire device. Its side walls are equipped with multiple sets of hydraulic support legs 6, which are used to extend and support the ground during construction to ensure the stability of the vehicle body. The horizontal detection and control instrument 9 is installed on the engineering vehicle 1 and electrically connected to the hydraulic support legs 6. It can automatically detect the levelness of the vehicle body and control the hydraulic support legs 6 to adjust, ensuring the verticality of the pile driving.

[0022] The tilting frame assembly 2 is used to support the piling mechanism and realize the vertical tilting from the transportation state to the working state. The tilting frame assembly 2 includes a main frame 21, a support frame 22, hydraulic cylinders 23, and a support frame 24; the main frame 21 is a long strip frame plate structure. The support frame 22 is erected and installed at the rear of the engineering vehicle 1. The middle section of the main frame 21 is hinged to the top end face of the support frame 22 near the rear, forming a lever-type hinge structure; the support frame 24 is installed on the top of the engineering vehicle 1 near the front side. When the device is in the transportation state, the main frame 21 is placed horizontally and supported by the support frame 24; two sets of hydraulic cylinders 23 are hinged to the top of the engineering vehicle 1. The free ends of the two sets of hydraulic cylinders 23 are hinged to the middle section of the traction mechanism 3 (or the corresponding connection point on the main frame 21). Through the extension and retraction of the hydraulic cylinders 23 and the weight of the tilting frame assembly 2 itself, the main frame 21 is controlled to stand upright or fall down around the hinge point of the support frame 22.

[0023] like Figure 3 , Figure 6 and Figure 7 As shown, the traction mechanism 3 is installed on the engineering vehicle 1 and the main frame 21, and is used to drive the piling assembly to rise and fall. The traction mechanism 3 includes a take-up roller 31, a reduction motor 32, a traction cable 33, a guide pulley 34, a guide rod 35, and a slide 36. The take-up roller 31 is installed on the top of the engineering vehicle 1 near the rear end, and the reduction motor 32 is connected to the take-up roller 31 through a coupling. Two guide rods 35 are installed inside the main frame 21 and distributed along its axial direction. The slide 36 is slidably sleeved on the guide rods 35. The guide pulley 34 is installed at the top of the main frame 21 (the end away from the support frame 22). One end of the traction cable 33 is wound around the take-up roller 31, and the other end passes around the top guide pulley 34 and enters the main frame 21 to connect with the slide 36. By rotating the reduction motor 32 forward and reverse, the traction cable 33 is wound up and down, thereby pulling the slide 36 to move up and down along the guide rod 35.

[0024] The rotary piling assembly 4 is located within the tilting frame assembly 2 and includes a sub-frame 41, drill rod 42, and drive motor 43. The sub-frame 41 (e.g., ...) is installed on the side of the main frame 21 furthest from the engineering vehicle 1. Figure 3 As shown, the subframe 41 can serve as a reinforcing structure or an installation reference); the drill rod 42 is rotatably connected to the side wall of the slide table 36 near the rear of the engineering vehicle 1, and the drive motor 43 is mounted on the slide table 36, with its output shaft connected to the top of the drill rod 42 via a coupling, directly driving the drill rod 42 to rotate for drilling operations.

[0025] like Figure 2 , Figure 4 and Figure 5 As shown, in order to solve the problems of sludge removal and heat dissipation, the device is equipped with a discharge module 5, a locking module 7, and an air blowing module 8.

[0026] The discharge module 5 is fitted around the drill rod 42. Specifically, the discharge module 5 includes a guide cylinder 51, an outer expansion cylinder A52, an outer expansion cylinder B53, a guide plate 54, and a baffle 55. The guide cylinder 51 is detachably fitted around the drill rod 42, with a gap between them to form a sludge channel. The top of the guide cylinder 51 has an outwardly curved outer expansion cylinder A52 integrally formed, and the bottom has an outwardly curved outer expansion cylinder B53 integrally formed. During operation, the outer expansion cylinder B53 contacts the ground, covering the contact point between the drill rod 42 and the ground to prevent sludge from splashing everywhere. The outer wall of the guide cylinder 51 is provided with a U-shaped guide plate 54, which is inclined towards the rear of the engineering vehicle 1, and a baffle 55 is provided at the end near the vehicle body. The sludge swirling out from the outer expansion cylinder A52 falls into the guide plate 54 and is transported away from the vehicle body and discharged under the action of gravity and airflow.

[0027] The locking module 7 is used to fix the discharge module 5 to the frame. The locking module 7 includes an internal threaded cylinder 71, an external threaded post 72, a chuck 73, and a nut 74. The guide cylinder 51 has an internal threaded cylinder 71 on its outer wall, and the external threaded post 72 is threadedly connected therein. The end of the external threaded post 72 is rotatably connected to the chuck 73, which can engage with the corresponding part of the sub-frame 41. By rotating the nut 74, the extension length of the external threaded post 72 is adjusted, so that the chuck 73 is fastened to the sub-frame 41, thereby fixing the position of the guide cylinder 51.

[0028] The air blowing module 8 includes a mounting base 81, an air pump 82, a connecting pipe 83, and a heat-conducting ring 84. The mounting base 81 is located on the lower part of the outer wall of the guide cylinder 51, and the air pump 82 is mounted on it. The output end of the air pump 82 is connected to the inside of the guide cylinder 51 through the connecting pipe 83 to inject high-pressure gas into the cylinder to assist in mud removal. A heat-conducting ring 84 is installed at the bottom of the slide table 36 (i.e., below the drive motor 43). The heat-conducting ring 84 surrounds the drill rod 42 and has air holes in its inner ring. The input end of the air pump 82 is connected to the heat-conducting ring 84 through a flexible hose (not shown in the figure, to accommodate the movement of the slide table 36).

[0029] Working principle: During construction, the engineering vehicle 1 arrives at the designated position, the hydraulic support leg 6 extends and levels; the hydraulic cylinder 23 is activated to erect the main frame 21; the discharge module 5 is fixed to the lower end of the sub-frame 41 through the locking module 7, and the outer expansion cylinder B53 abuts against the ground; the drive motor 43 is started to drive the drill rod 42 to rotate, and at the same time the reduction motor 32 releases the traction cable 33, and the slide table 36 drives the drill rod 42 to descend into the soil along the guide rod 35.

[0030] As drilling progresses, the air pump 82 starts. The air pump 82 draws air from the heat-conducting ring 84 through a hose. Since the heat-conducting ring 84 is close to the heat-generating part where the drive motor 43 connects to the drill rod 42, the air extraction process carries away a large amount of heat, achieving heat dissipation for key moving parts. The heated air is pressurized by the air pump 82 and injected into the channel between the guide cylinder 51 and the drill rod 42 through the connecting pipe 83. The upward high-speed flow of hot air not only reduces the adhesion of sludge to the drill rod but also provides upward thrust. Combined with the mechanical conveying of the spiral blades, the wet heavy sludge is smoothly pushed up to the outer expansion cylinder A52 and finally discharged through the guide plate 54, avoiding sludge accumulation and drill bit clogging.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A piling device for municipal engineering construction, characterized in that, include: The engineering vehicle (1), the tilting frame assembly (2), the traction mechanism (3) and the rotary pile driving assembly (4) are installed on the engineering vehicle (1) and are used to carry and control the tilting of the rotary pile driving assembly (4). The rotary pile driving assembly (4) is used for helical pile driving and is located inside the tilting frame assembly (2). The traction mechanism (3) is installed on the engineering vehicle (1) and is connected to the traction mechanism (3) inside the tilting frame assembly (2). The traction mechanism (3) can cooperate with the gravity of the tilting frame assembly (2) to control the pile driving assembly inside it to move along the axial direction of the tilting frame assembly (2). Hydraulic support leg (6) and horizontal detection controller (9) are provided. The hydraulic support leg (6) is located on the side wall of the engineering vehicle (1) for support. The horizontal detection controller (9) is installed on the engineering vehicle (1) and electrically connected to the hydraulic support leg (6). The discharge module (5), locking module (7), and air blowing module (8) are provided. The discharge module (5) is fitted around the outside of the tilting frame assembly (2) and is used to guide and transport the sludge during piling in cooperation with the tilting frame assembly (2). The locking module (7) is located on the outer wall of the discharge module (5) and is used to abut against the rotating piling assembly (4). The air blowing module (8) is installed on the discharge module (5) and communicates with the inside of the discharge module (5). The air blowing module (8) can clean the tilting frame assembly (2) with air and can dissipate heat from the heat-generating parts of the rotating piling assembly (4).

2. The piling device for municipal engineering construction according to claim 1, characterized in that, The tilting frame assembly (2) includes a main frame (21), a support frame (22), a hydraulic cylinder (23), and a support frame (24). The main frame (21) is mounted on the engineering vehicle (1) and is a long strip frame plate structure. The support frame (22) is mounted on the rear of the engineering vehicle (1). The top end face of the support frame (22) is hinged to the middle section of the main frame (21) near the rear. Two sets of hydraulic cylinders (23) are hinged on the top of the engineering vehicle (1). The free ends of the two sets of hydraulic cylinders (23) are hinged to the middle section of the traction mechanism (3). A support frame (24) that can support the main frame (21) is mounted on the top of the engineering vehicle (1) near the front side.

3. A piling device for municipal engineering construction according to claim 2, characterized in that, The discharge module (5) includes a guide cylinder (51), an outer expansion cylinder A (52) and an outer expansion cylinder B (53). The guide cylinder (51) is detachably sleeved around the drill rod (42). A channel is formed between the guide cylinder (51) and the drill rod (42) for the sludge to be spun out during the helical pile driving process to pass through. The top end face of the guide cylinder (51) is integrally formed with an outwardly curved outer expansion cylinder A (52). The bottom end face of the guide cylinder (51) is integrally formed with an outwardly curved outer expansion cylinder B (53). The outer expansion cylinder B (53) can overlap with the ground and cover the part of the drill rod (42) that contacts the ground.

4. A piling device for municipal engineering construction according to claim 3, characterized in that, The discharge module (5) also includes a guide plate (54) and a baffle (55). The outer wall of the guide cylinder (51) is integrally formed with a guide plate (54) having a U-shaped cross section and tilting towards the rear of the engineering vehicle (1). The guide plate (54) is used to collect, transport and guide the sludge that is spun out through the guide cylinder (51) and the outer expansion cylinder A (52). The end face of the guide plate (54) near the engineering vehicle (1) is integrally formed with a baffle (55).

5. A piling device for municipal engineering construction according to claim 4, characterized in that, The traction mechanism (3) includes a take-up roller (31), a reduction motor (32), a traction cable (33), a guide pulley (34), a guide rod (35), and a slide (36). The take-up roller (31) is installed on the top of the engineering vehicle (1) near the tail end. The take-up roller (31) is equipped with a reduction motor (32) whose output shaft is connected to its shaft end through a coupling. The traction cable (33) is wound and connected on the take-up roller (31). The main frame (21) is equipped with a guide rod (35) that is distributed along its axial direction and connected to its two ends. The slide (36) is slidably sleeved on the guide rod (35). The guide pulley (34) is installed on the end face of the main frame (21) away from its hinge point with the support frame (22). The traction cable (33) is wound around the guide pulley (34) and passes through the main frame (21) and is connected to the slide (36).

6. A piling device for municipal engineering construction according to claim 5, characterized in that, The rotary piling assembly (4) includes a subframe (41), a drill rod (42), and a drive motor (43). The subframe (41) is installed on the side of the main frame (21) away from the engineering vehicle (1). The slide (36) is rotatably connected to the side wall near the rear of the engineering vehicle (1) for helical piling. The drive motor (43) is provided on the slide (36). The output shaft of the drive motor (43) is connected to the end of the drill rod (42) through a coupling.

7. A piling device for municipal engineering construction according to claim 6, characterized in that, The air blowing module (8) includes a mounting base (81), an air pump (82), a connecting pipe (83), and a heat-conducting ring (84). The mounting base (81) is installed on the outer wall of the guide cylinder (51) near the outer expansion cylinder B (53). The air pump (82) is installed on the mounting base (81). The output end of the air pump (82) is connected to the connecting pipe (83). The end of the connecting pipe (83) is connected to the inside of the guide cylinder (51). The bottom of the slide (36) is equipped with a heat-conducting ring (84). The heat-conducting ring (84) is located around the drill rod (42). The inner ring of the heat-conducting ring (84) is provided with air holes. The input end of the air pump (82) can be connected to the heat-conducting ring (84) through a hose.

8. A piling device for municipal engineering construction according to claim 7, characterized in that, The locking module (7) includes an internal threaded cylinder (71), an external threaded column (72), a chuck (73), and a nut (74). Multiple sets of internal threaded cylinders (71) are symmetrically arranged on the outer wall of the guide cylinder (51). The internal threaded cylinder (71) is internally threaded and connected to the external threaded column (72). The end of the external threaded column (72) away from the guide cylinder (51) is rotatably connected to a chuck (73) that can be locked onto the sub-frame (41). The middle section of the outer wall of the external threaded column (72) is welded to a nut (74).

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