A water flow assisted pile driver bit and pile driver apparatus

Abstract

The application discloses a water flow assisted pile machine drill bit and a pile machine device, the water flow assisted pile machine drill bit comprises a rotary cutting body and a water outlet, at least one group of rotary cutting bodies is arranged, and a water outlet water discharge area is at least partially located in front of a rotary cutting body drilling area. The application combines the water outlet and the rotary cutting body to form a water flow assisted pile machine drill bit structure. In the process of rotating drilling, the water outlet sprays water flow to break the soil layer and destroy the soil compaction in the drilling area. The rotary cutting body is subjected to smaller resistance, the digging efficiency of the rotary cutting body is improved, and the wear rate of the rotary cutting body is reduced.

Description

Technical Field

[0001] This application relates to the field of pile driver equipment technology, and in particular to a water flow-assisted pile driver drill bit and pile driver equipment. Background Technology

[0002] Chain-type rotary cutter is a common structure used in piling equipment for excavating earth. It drives the rotation of the sprocket and idler wheel to rotate the cutter on the chain track to cut and mix the soil. However, during the downward excavation process, the cutter experiences a large cutting force in hard soil and structural layers, resulting in rapid cutter wear and difficulty in achieving rapid excavation, leading to low engineering efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a water-assisted pile driver drill bit to improve the efficiency and safety of the pile driver during the earth excavation process.

[0004] Another object of this application is to provide a pile driver device that includes the above-mentioned water flow-assisted pile driver drill bit.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A water-assisted pile driver drill bit includes a rotary cutting body and a water outlet. At least one set of rotary cutting bodies is provided, and the water outlet's water discharge area is at least partially located in front of the drilling area of ​​the rotary cutting body.

[0007] Preferably, in the above-mentioned water-assisted pile driver drill bit, the water flow direction of the outlet is parallel to the drilling direction of the rotary cutting body, or the water flow direction of the outlet is at a preset angle to the drilling direction of the rotary cutting body, and the absolute value of the preset angle is not greater than 45°.

[0008] Preferably, in the above-mentioned water-assisted pile driver drill bit, at least one set of water outlets is provided on each of the opposite sides of a single set of rotary cutting bodies.

[0009] Preferably, in the above-mentioned water-assisted pile driver drill bit, at least two sets of rotary cutting bodies are provided, and at least one set of water outlets is provided between two adjacent sets of rotary cutting bodies.

[0010] Preferably, in the above-mentioned water-assisted pile driver drill bit, at least one of the water outlets is adjustable in terms of opening / closing status and flow rate.

[0011] Preferably, the above-mentioned water-assisted pile driver drill bit also includes a sensor that is communicatively connected to the adjustment structure of the water outlet. The sensor is used to detect the soil layer condition that the rotary cutting body needs to excavate and to adjust the flow output of the water outlet.

[0012] Preferably, in the above-mentioned water-assisted pile driver drill bit, along the rotation axis of the rotary cutting body, the projection of the water outlet on one side of the rotary cutting body is located within the coverage area of ​​the rotary cutting body.

[0013] Preferably, in the above-mentioned water-assisted pile driver drill bit, the water outlet includes a nozzle, and a pressurization structure connected to the nozzle is provided inside the water outlet.

[0014] Preferably, in the above-mentioned water-assisted pile driver drill bit, the outlet includes a water inlet channel, the first end of the water inlet channel is connected to the outlet, the second end of the water inlet channel is used to receive high-pressure water, and the flow cross-section of the first end of the water inlet channel is smaller than the flow cross-section of the second end.

[0015] A piling machine device includes at least one set of water-assisted piling machine drill bits as described in any of the above claims.

[0016] As can be seen from the above technical solution, the water-assisted pile driver drill bit provided in this application includes a rotary cutting body for performing drilling operations and a water outlet for assisting excavation. At least one set of rotary cutting bodies is provided according to excavation requirements, while the water outlet is used to eject water. The water outlet's action area is at least partially located in front of the drilling area of ​​the rotary cutting body. The impact and wetting effect of the water flow loosens the soil layer and breaks up the compacted soil in the area to be drilled, thereby reducing the excavation difficulty during the rotary cutting body's operation, improving the adaptability of the water-assisted pile driver drill bit, enabling it to drill through harder soil layers; it also reduces the wear of the rotary cutting body, thus extending the overall service life of the rotary cutting body and the water-assisted pile driver drill bit equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the drill bit structure for a water-assisted pile driver provided in this disclosure;

[0019] Figure 2 A front view of the excavation location structure of the rotary cutting body of the water-assisted pile driver drill bit;

[0020] Figure 3 A top view of the rotary cutting area;

[0021] Figure 4This is a schematic diagram showing the positions of the rotary cutting body and the water outlet.

[0022] Figure 5 A schematic diagram showing the water outlet settings around the two sets of rotary cutting bodies;

[0023] Figure 6 A schematic diagram showing the structural setup of multiple sets of rotary cutting bodies and water outlets;

[0024] Figure 7 This is a schematic diagram of the side structure of a rotary cutting body provided in an embodiment of the present disclosure;

[0025] Figure 8 This is a schematic diagram of the side structure of a rotary cutting body provided in another embodiment of the present disclosure;

[0026] Figure 9 This is a schematic diagram of the overall structure of the high-pressure water pipe system provided in the embodiments of this disclosure;

[0027] Figure 10 This is a schematic diagram of the water outlet structure;

[0028] Figure 11 for Figure 10 The rear view;

[0029] Figure 12 This is a schematic diagram of the cross-sectional structure of the water outlet.

[0030] in:

[0031] 10-Rotary cutting body; 20-Outlet; 210-Spout; 220-Inlet channel; 2210-First end; 2220-Second end; 30-High-pressure water pipe system; 310-Main pipe; 320-Diverter; 330-Branch pipe. Detailed Implementation

[0032] The core of this application is to disclose a water-assisted pile driver drill bit to improve the efficiency and safety of the pile driver during the earthwork excavation process.

[0033] Another object of this application is to provide a pile driver device that includes the above-mentioned water flow-assisted pile driver drill bit.

[0034] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0035] like Figure 1 , Figure 2 and Figure 3As shown in the present disclosure, an embodiment of the present disclosure provides a water-assisted pile driver drill bit for earthwork excavation. Specifically, the water-assisted pile driver drill bit mainly includes a rotary cutting body 10 and a water outlet 20. The rotary cutting body 10 is the structure that performs the drilling action. It specifically includes a rotary chain and multiple cutting blade sets arranged at uniform intervals along the circumferential direction of the outer wall of the rotary chain. The rotary cutting body 10 drives the rotary chain to rotate, thereby driving the multiple cutting blade sets to periodically pass through the structure to be drilled, thus realizing the drilling action. For the cutting blade sets, cemented carbide or diamond composite plates can be used as cutting teeth, and the rotation speed of the rotary chain can be adjusted to meet different drilling conditions. According to the requirements of the application scenario, at least one set of rotary cutting body 10 is provided. The water outlet 20 is used to spray water, and its water outlet area is at least partially located in front of the drilling area of ​​the rotary cutting body 10, so as to treat the soil layer to be excavated, so as to produce a hydraulic splitting and softening effect on the high-hardness soil structure, effectively reducing the cutting resistance of the rotary cutting body 10.

[0036] It should be noted that the outlet 20 can be positioned using a robotic arm or sliding rail mechanism, ensuring that its water-emitting area is always located 1-3 cm in front of the drilling area, thus providing sufficient impact on the soil layer. Preferably, high-pressure water is ejected from the outlet 20. During the drilling operation assisted by the water flow, the high-pressure water flow forms a pretreatment zone in front of the rotary cutting body 10, causing micro-cracks in the soil and reducing its bond strength. This significantly reduces the torque required for subsequent cutting by the rotary cutting body 10, thereby increasing its cutting efficiency under the same power conditions and reducing the wear rate of the cutting tools. Compared to existing technologies that rely solely on mechanical cutting, this embodiment achieves efficient crushing of high-hardness soil through the synergistic effect of hydraulic and mechanical processes, solving the problems of low cutting efficiency and short tool life in traditional methods, and improving the efficiency and safety of the drilling process.

[0037] Furthermore, in some embodiments of this disclosure, the water flow direction of the outlet 20 is parallel to the drilling direction of the rotary cutting body 10, and the water flow can directly impact the area to be excavated along the drill bit axis, so that the high-pressure water flow can act on the target soil layer to the maximum extent, and can form a concentrated impact on the target area, which is suitable for homogeneous hard soil layers.

[0038] In other embodiments, the water flow direction of the outlet 20 is inclined at a preset angle to the drilling direction of the rotary cutting body 10, and the absolute value of the preset angle is no greater than 45°. This can form a fan-shaped pre-loosening area in front of the rotary cutting body 10, thus having a larger water flow range, which is suitable for complex geological conditions with cracks or interlayers. It should also be noted that in a preferred embodiment of this disclosure, the preset angle can be set to 30°. At this time, the water flow can effectively pre-loosen the soil layer without causing energy dispersion due to an excessively large angle.

[0039] In addition, it should be noted that the outlet 20 can adopt an angle-adjustable structure, and the firing angle can be dynamically adjusted through mechanical adjustment or hydraulic control. A single set of outlet 20 can be used to meet different firing scenario requirements.

[0040] Furthermore, in the water-assisted pile driver drill bit provided in the embodiments of this disclosure, such as Figure 2 and 4 As shown, for a single set of rotary cutting bodies 10, at least one set of water outlets 20 is provided on each of its opposite sides, and the number of water outlets 20 in each set can be set to 1-4, arranged in a linear array or a ring array; the water outlets 20 on both sides can be supplied with liquid through independent pipelines, or can be synchronously controlled by a ring distributor, which can produce a dynamic balance effect when the rotary cutting body 10 is working, that is, the water outlets 20 on both sides form a counter-flow field, which increases the water flow coverage area on the perimeter of the rotary cutting body 10, and significantly improves the uniformity of soil breaking.

[0041] Based on the above embodiments, such as Figure 5 and Figure 6 As shown, at least two sets of rotary cutting bodies 10 are provided, and at least one set of water outlets 20 is provided between two adjacent sets of rotary cutting bodies 10. Specifically, the water outlets 20 between adjacent rotary cutting bodies 10 can be arranged axially symmetrically to ensure that the high-pressure water flow can evenly cover the transition area. In addition to providing at least one set of water outlets 20 on each side of a single set of rotary cutting bodies 10, another set of water outlets 20 is provided in areas between two sets of rotary cutting bodies 10 where soil layer stacking is likely to occur and there is a risk of secondary compaction, to enhance the water flow and coordinate with the surrounding water outlets 20 to achieve seamless coverage of the working area. The setting of the middle water outlet 20 avoids the problem of the breaking blind zone that exists in traditional multi-drill bit operations.

[0042] To further optimize the above technical solution, in some embodiments of this disclosure, at least one outlet 20 can be adjusted in its opening and closing state, as well as its operating output flow rate, to adapt to different working conditions. It should be noted that in some embodiments of this disclosure, a regulating valve can be provided on the outlet 20. The regulating valve can be an electric proportional valve, a pneumatic regulating valve, or a hydraulic control valve, etc. It can be installed at the connection between the outlet 20 and the high-pressure water pipe, or integrated into the internal structure of the outlet 20. By adjusting the valve opening, the opening and closing state and the operating flow rate of the corresponding outlet 20 are adjusted accordingly, thereby achieving dynamic control of the water flow. Specifically, the regulating valve can control the opening and closing state of the outlet 20, selectively opening or closing a specific outlet 20. In other embodiments of this disclosure, the outlet 20 can also be directly supplied with water by a supply pump, and the opening and closing state and operating flow rate of the outlet 20 can be adjusted by regulating the start / stop and speed of the supply pump.

[0043] By adjusting the operating status of the regulating valve or the supply pump, the flow rate at the outlet 20 can be adjusted, allowing the water-assisted pile driver drill bit to flexibly adjust the spray intensity and range of the water flow according to different soil conditions or excavation needs. When encountering harder soil layers, the flow rate can be increased to enhance the hydraulic fracturing effect; in soft soil layers, the flow rate can be reduced to meet the fracturing requirements while avoiding energy waste.

[0044] It should be noted that the regulating valve is also equipped with a manual adjustment knob as a backup control method, allowing for manual intervention even if the automatic control system fails.

[0045] To further enhance the intelligence of the outlet 20 adjustment process, in some embodiments of this disclosure, the operating status of the outlet 20 is adaptively adjusted according to the actual soil conditions. Specifically, the water flow-assisted pile driver drill bit may also include sensors that are communicatively connected to the adjustment structure of the outlet 20, such as a regulating valve or a supply pump. Specifically, the sensors may be laser sensors, or pressure sensors, torque sensors, or soil identification sensors that directly contact the soil layer. The soil hardness is determined by measuring the cutting resistance of the drill bit or analyzing the reflected wave signal of the soil layer, and the soil layer status is fed back in real time to adjust the opening of the outlet 20.

[0046] In other embodiments, the adjustment structure of the outlet 20 can also adaptively adjust based on the operating data acquired by the equipment itself during the operation of the water-assisted pile driver drill bit. Specifically, it can determine the soil hardness based on parameters such as the operating pressure and pressing speed of the lowering cylinder during the operation of the water-assisted pile driver drill bit, and feed back the soil layer status to the adjustment structure to adjust the operating state of the outlet 20. These embodiments, by adjusting the opening of the outlet 20 in real time by feeding back the soil layer status, avoid the efficiency loss and equipment waste caused by manual trial and error adjustments. Furthermore, precise flow control ensures a balance between excavation efficiency and energy consumption control, effectively solving the problem of excavation efficiency fluctuations caused by soil layer changes.

[0047] Furthermore, in some embodiments of this disclosure, such as Figure 4 , Figure 7 and Figure 8 As shown, along the rotation axis L of the rotary cutting body 10, the projection of the water outlet 20 on one side of the rotary cutting body 10 is located within the coverage area of ​​the rotary cutting body 10. The rotation axis L of the rotary cutting body 10 refers to the direction of the central axis of the drill bit rotation area. The fact that the projection of the water outlet 20 is located within the coverage area of ​​the rotary cutting body 10 means that, viewed from the side of the rotary cutting body 10, the position of the water outlet 20 coincides with the working area of ​​the rotary cutting body 10. This ensures that the water flow can directly act on the soil structure in front of the rotary cutting body 10, avoiding the situation where the water flow is not applied effectively or is wasted. This achieves an effective auxiliary effect on the drilling area, thus solving the technical problem of how to ensure that the water flow from the water outlet 20 can effectively act on the drilling area of ​​the rotary cutting body 10.

[0048] Furthermore, in the water-assisted pile driver drill bit provided in the embodiments of this disclosure, the outlet 20 has a nozzle 210. The nozzle 210 can be configured as a round hole, a square hole, a trapezoidal hole, or a linear structure. It should be noted that the round hole nozzle 210 has a more uniform outflow state, while the linear nozzle 210 can have higher concentration and impact force, which can achieve a more effective high-pressure scouring and crushing effect on a smaller area of ​​specific parts.

[0049] Based on this, the water outlet 20 is positioned close to the rotary cutting body 10 that performs the cutting and excavation action, and its nozzle 210 is directed towards the bottom area of ​​the rotary cutting body 10 in the working position. This allows it to wet and disperse the soil and structural layers with high hardness at the bottom of the rotary cutting body 10, reducing the resistance of the rotary cutting body 10 during the cutting process, improving cutting efficiency, and also reducing wear on the rotary cutting body 10 and extending its service life.

[0050] Based on the above embodiment, the outlet 20 is further equipped with a pressurization structure to increase the outflow velocity and pressure at the nozzle 210, thereby effectively breaking up hard soil layers. The pressurization structure can be a plunger pump, a booster, an accumulator, or a venturi tube, all of which can pressurize the water flow exiting the nozzle 210. Figure 10 , Figure 11 and Figure 12 As shown, in some embodiments of this disclosure, the outlet 20 is provided with an inlet channel 220 as a pressurization structure for the outlet 20. Specifically, the inlet channel 220 includes a first end 2210 and a second end 2220. The first end 2210 is connected to the nozzle 210 of the outlet 20, while the second end 2220 is used to receive high-pressure water from a high-pressure pump station. In particular, the flow cross-section of the first end 2210 of the inlet channel 220 is smaller than that of the second end 2220. After receiving the high-pressure water flow at the second end 2220, the water flow will be further compressed due to the smaller flow cross-section of the first end 2210, thereby accelerating the ejection and increasing its ejection pressure. It should also be noted that, in a specific embodiment of this disclosure, the water inlet channel 220 is a structure that continuously contracts from its second end 2220 to its first end 2210. The second end 2220 of the water inlet channel 220 has a larger cross-sectional area, which can be connected to the high-pressure pump station through a larger channel structure, so that the outlet 20 has a larger carrying capacity to receive a larger instantaneous flow. At the same time, the structure that continuously contracts from the second end 2220 to the first end 2210 allows the high-pressure water to be uniformly and gradually concentrated and accelerated after entering the water inlet channel 220, thereby forming a high-pressure water flow with higher impact force at the nozzle 210, so as to enhance the scouring effect of the water flow on the soil layer and structural layer with high hardness at the bottom of the rotary cutting body 10.

[0051] Furthermore, it should be noted that the inlet channel 220 achieves pressure and energy conversion through changes in fluid velocity within the pipe. Specifically, when high-pressure water enters from the second end 2220 of the inlet channel 220, the water velocity gradually increases as the channel narrows, resulting in a highly concentrated linear flow at the nozzle 210. Simultaneously, the contraction structure of the inlet channel 220 effectively reduces turbulence and energy loss within the outlet 20. Based on this, the inlet channel 220 can be a conical, trapezoidal, or frustum-shaped contraction structure, as long as it effectively concentrates and contracts the high-pressure water flow.

[0052] Furthermore, in some embodiments of this disclosure, the nozzle 210 is designed as a rectangular structure to produce a regular high-pressure water flow pattern. It should be noted that the width of the rectangular nozzle 210 is 0.08mm-0.12mm and the length is 6.5mm-7.5mm. This size range allows the water flow to form a uniform linear flow at the nozzle 210 and has sufficient impact force to achieve the effect of dispersing the soil layer. Furthermore, regarding the structure of the nozzle 210, if its area is large (i.e., wider or longer), the high-pressure water jet emitted from the nozzle 210 can cover a larger area, but its impact force will decrease, resulting in a weakened effect on the soil and structural layers. The rotary cutting body 10 will still experience significant resistance during the cutting process, making it difficult to achieve the goal of improving excavation efficiency. On the other hand, if its area is small (i.e., the width or length of the nozzle 210 is reduced), the high-pressure water jet emitted from the nozzle 210 will have sufficient impact force to meet the requirement of dispersing the soil and structural layers. However, due to its smaller emission area, in order to achieve the smooth operation of the water-assisted pile driver drill bit, more outlets 20 and pipeline structures are required, which will lead to a significant increase in the production cost of the water-assisted pile driver drill bit. At the same time, the more complex structure will also increase the failure risk of the water-assisted pile driver drill bit, resulting in increased maintenance costs.

[0053] In order to ensure smooth water supply from each of the 20 water outlets, such as Figure 1 and Figure 9As shown in some embodiments of this disclosure, the water-assisted pile driver drill bit also includes a high-pressure water pipe system 30. The high-pressure water pipe system 30 mainly includes a main pipe 310, a diverter 320, and branch pipes 330. The main pipe 310 is connected to a high-pressure pump station to provide high-pressure water flow for the entire high-pressure water pipe system 30. The diverter 320 is located at the end of the main pipe 310 to collect, distribute, and allocate the high-pressure water flow in the main pipe 310 to at least two branch pipes 330. It should be noted that the diverter 320 can also be implemented by a welded diversion branch or an independently supplied water pipe. Branch pipes 330 are used to guide high-pressure water flow to outlets 20 located at various positions. Each branch pipe 330 has at least one outlet 20 at its end to spray high-pressure water flow. The high-pressure water flow can directly impact or flow to the soil layer that the rotary cutting body 10 needs to cut, thereby wetting the soil layer and making it more uniform and soft. This reduces the problem of excessive impact on the rotary cutting body 10 caused by the high local hardness of the soil layer, which could lead to damage to the rotary cutting body 10. The high-pressure water pipes can be set up with outlets 20 around the rotary cutting body 10 at different positions in the water-assisted pile driver drill bit through various branch pipes 330, forming a network structure. Then, through the supply of a single high-pressure pump station, the bottom layer area of ​​different rotary cutting bodies 10 can be wetted and flushed. After the rotary cutting body 10 is expanded in the water-assisted pile driver drill bit, the outlets 20 can also be set at preset positions by adding branch pipes 330 in the diverter 320 on the main pipe 310, thereby meeting the structural expansion requirements of the water-assisted pile driver drill bit.

[0054] It should be noted that a diverter 320 can also be installed on the branch pipe 330 to continue branching and form a mesh structure, and an outlet 20 can be installed on the branch pipe 330 at a preset position.

[0055] Furthermore, this utility model embodiment also provides a piling machine device, which is equipped with at least one set of water-assisted piling machine drill bits provided in any of the above embodiments. It should also be noted that, since the water-assisted piling machine drill bit has the aforementioned technical effects, the piling machine device also possesses the aforementioned technical effects, which will not be elaborated upon here.

[0056] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may not be defined in the steps or units listed, but may include steps or units not listed.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water-assisted pile driver drill bit, characterized in that, It includes a rotary cutting body (10) and a water outlet (20). The rotary cutting body (10) is provided in at least one set, and the water outlet (20) has a water outlet area located at least partially in front of the drilling area of ​​the rotary cutting body (10).

2. The water-assisted pile driver drill bit as described in claim 1, characterized in that, The water flow direction of the outlet (20) is parallel to the drilling direction of the rotary cutting body (10), or the water flow direction of the outlet (20) is at a preset angle to the drilling direction of the rotary cutting body (10), and the absolute value of the preset angle is not greater than 45°.

3. The water-assisted pile driver drill bit as described in claim 1, characterized in that, At least one set of water outlets (20) is provided on each of the opposite sides of the single set of rotary cutting bodies (10).

4. The water-assisted pile driver drill bit as described in claim 3, characterized in that, At least two sets of the rotary cutting body (10) are provided, and at least one set of the water outlet (20) is provided between two adjacent sets of the rotary cutting body (10).

5. The water-assisted pile driver drill bit as described in claim 3, characterized in that, At least one of the outlets (20) is capable of adjusting the opening / closing state and flow rate.

6. The water-assisted pile driver drill bit as described in claim 5, characterized in that, It also includes a sensor that is communicatively connected to the adjustment structure of the outlet (20), the sensor being used to detect the soil layer state that the rotary cutting body (10) needs to excavate, and to adjust the flow output of the outlet (20).

7. The water-assisted pile driver drill bit as described in claim 1, characterized in that, Along the rotation axis of the rotary cutting body (10), the projection of the outlet (20) on one side of the rotary cutting body (10) is located within the coverage area of ​​the rotary cutting body (10).

8. The water-assisted pile driver drill bit as described in claim 1, characterized in that, The outlet (20) includes a nozzle (210), and a pressurization structure connected to the nozzle (210) is provided inside the outlet (20).

9. The water-assisted pile driver drill bit as described in claim 8, characterized in that, The outlet (20) includes an inlet channel (220), the first end (2210) of the inlet channel (220) is connected to the outlet (20), and the second end (2220) of the inlet channel (220) is used to receive high-pressure water. The flow cross section of the first end (2210) of the inlet channel (220) is smaller than the flow cross section of the second end (2220).

10. A pile driver device, characterized in that, It includes at least one set of water-assisted pile driver drill bits as described in any one of claims 1-9.

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