Water flow auxiliary pile machine drill bit and pile machine equipment

Abstract

The invention discloses a water flow auxiliary pile machine drill bit and pile machine equipment, the water flow auxiliary pile machine drill bit comprises at least one group of rotary cutting bodies and a water outlet, and the water outlet action area of the water outlet is at least partially located in front of the drilling area of the rotary cutting bodies. The water outlet and the rotary cutting body are combined to form a water flow auxiliary pile machine drill bit structure, in the rotary drilling and digging process of the rotary cutting body, water flow is ejected out of the water outlet to break through a soil layer and damage soil hardening of an area needing to be drilled and dug, the resistance effect borne by the rotary cutting body in the drilling and digging process is smaller, and the digging efficiency of the rotary cutting body is improved; and the abrasion rate of the rotary cutting body is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile machine equipment, in particular to a water flow assisted pile machine drill bit and a pile machine equipment. BACKGROUND

[0002] The chain rotary cutting body is a commonly used structure for excavating earthwork on the pile machine equipment, which rotates the cutter on the chain track through the rotation of the driving sprocket and the idler to realize the cutting and stirring of the soil body. However, in the downward excavation process, the cutter has a large cutting force in the excavation process for high-hardness soil and structural layers, which causes the cutter to wear out quickly and makes it difficult to achieve rapid excavation, resulting in low engineering operation efficiency. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a water flow assisted pile machine drill bit to improve the efficiency and safety of the pile machine in the process of excavating earthwork.

[0004] Another purpose of the present application is to provide a pile machine equipment comprising the above-mentioned water flow assisted pile machine drill bit.

[0005] To achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0006] A water flow assisted pile machine drill bit, comprising a rotary cutting body and a water outlet, the rotary cutting body is provided with at least one group, and the water outlet is at least partially located in front of the drilling area of the rotary cutting body.

[0007] Preferably, in the above-mentioned water flow assisted pile machine drill bit, the water flow emission direction of the water outlet is parallel to the drilling direction of the rotary cutting body, or the water flow emission direction of the water outlet is at a preset angle with 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 flow assisted pile machine drill bit, at least one group of the water outlets is arranged on the opposite sides of the single group of the rotary cutting bodies.

[0009] Preferably, in the above-mentioned water flow assisted pile machine drill bit, at least two groups of the rotary cutting bodies are provided, and at least one group of the water outlets is arranged between the adjacent two groups of the rotary cutting bodies.

[0010] Preferably, in the above-mentioned water flow assisted pile machine drill bit, at least one of the water outlets can adjust the opening and closing state and the flow.

[0011] Preferably, in the above-mentioned water flow assisted pile machine drill bit, further comprising a sensor in communication connection with the adjusting structure of the water outlet, the sensor is used to detect the soil layer state that needs to be excavated by the rotary cutting body, and adjust the flow output of the water outlet.

[0012] Preferably, in the water flow assisted pile machine drill bit, the projection of the water outlet on the side of the rotary cutting body along the rotation axis direction of the rotary cutting body is located within the coverage range of the rotary cutting body.

[0013] Preferably, in the water flow assisted pile machine drill bit, the water outlet comprises a nozzle, and a pressurization structure is arranged inside the water outlet and connected to the nozzle.

[0014] Preferably, in the water flow assisted pile machine drill bit, the water outlet comprises a water inlet channel, a first end of the water inlet channel is connected to the water outlet, a 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 pile machine device comprising at least one set of the water flow assisted pile machine drill bit as described in any one of the above.

[0016] As can be seen from the above technical solutions, the water flow assisted pile machine drill bit provided by the present application comprises a rotary cutting body for performing a drilling and digging action, and a water outlet for assisting digging. The rotary cutting body is provided with at least one set according to the digging requirement, and the water outlet is used to emit water flow. The water outlet action area of the water outlet is at least partially located in front of the drilling and digging area of the rotary cutting body. Through the impact and wetting effect of the water flow, the soil layer is softened and the soil compaction state of the drilling and digging area is destroyed, thereby reducing the digging difficulty in the action process of the rotary cutting body, improving the adaptability of the water flow assisted pile machine drill bit, and enabling it to drill and dig harder soil layers. It can also reduce the wear of the rotary cutting body, thereby prolonging the overall service life of the rotary cutting body and the water flow assisted pile machine drill bit device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 Structure diagram of the water flow assisted pile machine drill bit provided by the present disclosure;

[0019] Figure 2 Front view of the rotary cutting body digging position structure of the water flow assisted pile machine drill bit;

[0020] Figure 3 Top view of the rotary cutting body area;

[0021] Figure 4A schematic view of the position of the rotary cutting body and the water outlet;

[0022] Figure 5 A schematic view of the water outlet arrangement around the rotary cutting body of two groups;

[0023] Figure 6 A schematic view of the structure arrangement of the rotary cutting body and the water outlet of multiple groups;

[0024] Figure 7 A schematic view of the lateral structure of the rotary cutting body provided by an embodiment of the present disclosure;

[0025] Figure 8 A schematic view of the lateral structure of the rotary cutting body provided by another embodiment of the present disclosure;

[0026] Figure 9 A schematic view of the overall structure of the high-pressure water pipe system provided by an embodiment of the present disclosure;

[0027] Figure 10 A schematic view of the structure of the water outlet;

[0028] Figure 11 A Figure 10 rear view;

[0029] Figure 12 A schematic view of the cross-sectional structure of the water outlet.

[0030] Wherein:

[0031] 10-rotary cutting body; 20-water outlet; 210-nozzle; 220-water inlet channel; 2210-first end; 2220-second end; 30-high-pressure water pipe system; 310-main pipe; 320-diverter; 330-branch pipe. DETAILED DESCRIPTION

[0032] The core of the present application is to disclose a water flow assisted pile machine drill bit to improve the efficiency and safety of the pile machine in the process of excavating earthwork.

[0033] Another purpose of the present application is to provide a pile machine device comprising the above-mentioned water flow assisted pile machine drill bit.

[0034] In order for those skilled in the art to better understand the present application, the embodiments of the present application will be described below with reference to the accompanying drawings, and in addition, the embodiments shown below do not have any limiting effect on the content of the invention recited in the claims. In addition, the entire content of the constitution represented by the following embodiments is not limited to what is necessary as a solution to the invention recited in the claims.

[0035] As Figure 1 , Figure 2 and Figure 3As shown, the water flow assisted pile machine drill bit provided by the embodiment of the present disclosure is used for earth excavation, and specifically, the water flow assisted pile machine drill bit mainly comprises a rotary cutting body 10 and a water outlet 20. The rotary cutting body 10 is a structure for performing a drilling action, and specifically comprises a rotary chain and a plurality of cutting tool groups arranged at uniform intervals along the circumference of the outer wall of the rotary chain. The rotary cutting body 10 drives the plurality of cutting tool groups to periodically pass through a structure to be drilled by driving the rotary movement of the rotary chain, so as to realize the drilling action. For the cutting tool group, a hard alloy or a diamond composite sheet can be used as a cutting tooth, and the rotary speed of the rotary chain can be adjusted to meet different drilling conditions. According to the requirements of the use scene, the rotary cutting body 10 is provided with at least one group. The water outlet 20 is used for spraying water flow, and the water flow action area of the water outlet 20 is at least partially located in front of the drilling area of the rotary cutting body 10, so as to be able to process the soil layer to be excavated, so that the high-hardness soil structure produces a hydraulic splitting and softening effect, and the cutting resistance of the rotary cutting body 10 is effectively reduced.

[0036] It should be noted that the water outlet 20 can be adjusted in position by a mechanical arm or a sliding rail mechanism, so that the water flow action area of the water outlet 20 is always located at a position 1cm-3cm in front of the drilling area, so as to have sufficient impact effect on the soil layer. Preferably, the water outlet 20 sprays high-pressure water flow, and in the process of the water flow assisted pile machine drill bit performing the drilling action, the high-pressure water flow forms a pretreatment area in front of the rotary cutting body 10, so that the soil body produces micro-cracks and reduces the bonding strength, and the torque required when the rotary cutting body 10 is subsequently cut is significantly reduced. Thus, under the same power condition, the cutting efficiency of the rotary cutting body 10 is improved, and the wear rate of the cutter of the rotary cutting body 10 is reduced. Compared with the prior art which simply relies on mechanical cutting, the embodiment of the present disclosure realizes efficient breaking of high-hardness soil by the synergistic effect of water and machinery, solves the problems of low cutting efficiency and short tool life in the traditional method, and improves the efficiency and safety of the drilling process.

[0037] Further, in some embodiments of the present disclosure, the water flow emission direction of the water 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 axial direction of the drill bit, so that the high-pressure water flow can act on the target soil layer to the maximum extent, can form concentrated impact on the target area, and is suitable for homogeneous hard soil layers.

[0038] In other embodiments, the water outflow direction of the water 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 not greater than 45°, which can form a fan-shaped pre-loosening area in front of the rotary cutting body 10, and has a larger water flow range, which is suitable for complex geological conditions with fissures or interlayers; and it should be noted that in a preferred embodiment of the present disclosure, the preset angle can be set to 30°, at which the water flow can effectively pre-loosen the soil layer, and the energy will not be dispersed due to the large angle.

[0039] In addition, it should be noted that the water outlet 20 can adopt an angle-adjustable structure, and the dynamic adjustment of the outflow angle can be realized by mechanical adjustment or hydraulic control, and a single water outlet 20 is suitable for different outflow scenarios.

[0040] Further, in the water flow assisted pile machine drill bit provided in the embodiments of the present disclosure, as shown in Figure 2 and 4 for a single set of rotary cutting bodies 10, at least one set of water outlets 20 is arranged on the opposite sides, and the number of each set of water outlets 20 can also be set to 1-4, arranged in a linear array or a ring array; the two side water outlets 20 can be supplied with liquid through independent pipelines, or a ring distributor can be used to realize synchronous control, which can produce a dynamic balance effect when the rotary cutting body 10 is working, that is, the two side water outlets 20 form a counter-flow flow field, which improves the water flow coverage area on the circumference of the rotary cutting body 10, and the uniformity of soil crushing is significantly improved.

[0041] Based on the above-mentioned embodiments, as shown in Figure 5 and Figure 6 at least two sets of rotary cutting bodies 10 are arranged, and at least one set of water outlets 20 is arranged between the adjacent two sets of rotary cutting bodies 10. Specifically, the water outlets 20 between the adjacent rotary cutting bodies 10 can adopt an axial symmetric arrangement, so that the high-pressure water flow can uniformly cover the transition area, and on the basis of at least one set of water outlets 20 arranged on the opposite sides of a single set of rotary cutting bodies 10, for the area between the two sets of rotary cutting bodies 10, which is prone to soil layer stacking and has the risk of secondary consolidation, a set of water outlets 20 is arranged to strengthen the water outflow, and cooperates with the surrounding water outlets 20 to realize seamless coverage of the working area, and through the arrangement of the intermediate water outlet 20, the problem of broken blind area existing in the traditional multi-drill bit operation is avoided.

[0042] To further optimize the above technical solutions, in some embodiments of the present disclosure, at least one water outlet 20 can be adjusted in the opening and closing state, and the running output flow is adjusted to adapt to different working conditions. It should be noted that in some embodiments of the present disclosure, an adjusting valve can be arranged on the water outlet 20, which can be an electric proportional valve, a pneumatic adjusting valve or a hydraulic control valve, etc. It can be installed at the connection between the water outlet 20 and the high-pressure water pipe, or integrated in the internal structure of the water outlet 20. By adjusting the opening of the valve, the opening and closing state and the opening flow of the corresponding water outlet 20 are adjusted to realize dynamic control of the water outflow state. Specifically, the adjusting valve can control the opening and closing state of the water outlet 20, and selectively open or close a specific water outlet 20. In another embodiment of the present disclosure, the water outlet 20 can also be directly supplied with water by the supply pump, and the opening and closing of the water outlet 20 and the running flow are adjusted by adjusting the start and stop and the speed of the supply pump.

[0043] By adjusting the running state of the adjusting valve or the supply pump, the flow size of the water outlet 20 can be adjusted, so that the water flow assisted pile machine drill bit can flexibly adjust the jetting intensity and range of the water flow according to different soil conditions or excavation requirements. When encountering hard soil, the flow can be increased to enhance the hydraulic crushing effect; when encountering soft soil, the flow can be reduced to meet the crushing requirements while avoiding energy waste.

[0044] It should be noted that the adjusting valve is also provided with a manual adjusting knob as a backup control means, which can still be manually intervened when the automatic control system fails.

[0045] To further improve the intelligent degree of the adjusting process of the water outlet 20, in some embodiments of the present disclosure, the running state of the water outlet 20 is adaptively adjusted according to the actual soil working condition. Specifically, the water flow assisted pile machine drill bit can also include a sensor in communication connection with the adjusting structure of the water outlet 20, such as the adjusting valve, the supply pump, etc. Specifically, the sensor can be a laser sensor, or a pressure sensor, a torque sensor or a soil identification sensor directly contacting the soil layer, which judges the soil hardness by measuring the drill cutting resistance or analyzing the soil layer reflection signal, and real-time feedbacks the soil layer state to adjust the opening of the water outlet 20.

[0046] In some other embodiments, the adjusting structure of the water outlet 20 can also be based on the operation data obtained by the device itself during the operation of the water flow assisted pile machine drill bit to realize adaptive adjustment. Specifically, the operation pressure of the down pressure oil cylinder, the down pressure speed of the down pressure oil cylinder and other parameters during the operation of the water flow assisted pile machine drill bit can be used to determine the hardness of the soil, and the state of the soil layer is fed back to the adjusting structure to adjust the operation state of the water outlet 20. The above embodiments can realize real-time feedback of the state of the soil layer to adjust the opening degree of the water outlet 20, avoid the efficiency loss and equipment waste caused by manual trial and error adjustment, and ensure the balance between the excavation efficiency and energy consumption control through accurate flow control, thereby effectively solving the problem of fluctuation of the excavation efficiency caused by the change of the soil layer.

[0047] In addition, in some embodiments of the present disclosure, as shown in Figure 4 、 Figure 7 and Figure 8 , the projection of the water outlet 20 on the side of the rotary cutting body 10 in the direction of the rotation axis L of the rotary cutting body 10 is located within the coverage range of the rotary cutting body 10. The direction of the rotation axis L of the rotary cutting body 10 refers to the central axis direction of the drill bit rotation region. The projection position of the water outlet 20 in the axis direction is located within the coverage range of the rotary cutting body 10, which means that from the side of the rotary cutting body 10, the position of the water outlet 20 coincides with the working region of the rotary cutting body 10, thereby ensuring that the water flow can directly act on the soil structure in front of the rotary cutting body 10, avoiding the situation that the water flow does not act in place or is wasted, and realizing effective auxiliary action on the drilling and digging region, thereby solving the technical problem of how to ensure that the water flow of the water outlet 20 can effectively act on the drilling and digging region of the rotary cutting body 10.

[0048] Further, in the water flow assisted pile machine drill bit provided in the embodiments of the present disclosure, the water outlet 20 has a nozzle 210, which can be provided in the form of a circular hole, a square hole, a trapezoidal hole or a linear structure. It should be noted that the circular hole nozzle 210 has a more uniform flow state, while the linear nozzle 210 can have higher concentration and impact force, and can realize more effective high-pressure flushing and breaking action on a smaller range of specific parts.

[0049] On this basis, the water outlet 20 is arranged close to the rotary cutting body 10 performing the cutting and digging action, and the nozzle 210 thereof faces the bottom region of the rotary cutting body 10 in the working position, so as to infiltrate and disperse the soil layer and structure layer with higher hardness at the bottom of the rotary cutting body 10, reduce the resistance effect of the rotary cutting body 10 in the cutting process, improve the cutting efficiency, and at the same time, reduce the wear of the rotary cutting body 10 and prolong the service life of the rotary cutting body 10.

[0050] And on the basis of the above embodiment, the inside of the water outlet 20 is also provided with a booster structure to improve the outflow speed and pressure at the position of the nozzle 210, so as to effectively break the hard soil layer, and the booster structure can be a plunger pump, a supercharger or an accumulator, etc. for energy supply structure, or a Venturi tube, etc., which can all realize the pressure boosting effect of the water flow at the position of the nozzle 210. As shown in Figure 10 、 Figure 11 and Figure 12 In some embodiments of the present disclosure, the inside of the water outlet 20 is provided with a water inlet channel 220 as a booster structure of the water outlet 20. Specifically, the water inlet channel 220 includes a first end 2210 and a second end 2220, the first end 2210 of which is communicated to the nozzle 210 of the water outlet 20, and the second end 2220 is used to receive high-pressure water from the high-pressure pump station. In particular, the flow cross section of the first end 2210 of the water 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 and accelerated to realize the accelerated ejection, so as to improve the ejection pressure. It should be noted that in a specific embodiment of the present disclosure, the water inlet channel 220 is a continuously shrinking structure from the second end 2220 to the first end 2210. The second end 2220 of the water inlet channel 220 has a larger cross-sectional area, which can be communicated with the high-pressure pump station through a larger channel structure, so that the water outlet 20 has a larger carrying capacity to receive a larger instantaneous flow. At the same time, the continuously shrinking structure from the second end 2220 to the first end 2210 enables the high-pressure water to be uniformly and gradually concentrated and accelerated after entering the water inlet channel 220, so as to form a high-pressure water flow with higher impact force at the nozzle 210, so as to strengthen the scouring effect of the water flow on the soil layer and structure layer with higher hardness at the bottom of the rotary cutting body 10.

[0051] In addition, it should be noted that the water inlet channel 220 realizes the conversion of pressure and energy through the change of the speed of fluid in the pipeline. When the high-pressure water enters from the second end 2220 of the water inlet channel 220, the speed of the water flow will gradually increase due to the gradually narrowing channel, so that the water flow can form a highly concentrated linear water flow at the nozzle 210. At the same time, the water inlet channel 220 with the shrinking structure can effectively reduce the turbulence and energy loss of the water flow inside the water outlet 20. On this basis, the water inlet channel 220 can be a taper, trapezoidal, circular truncated cone structure, etc. which can only realize the bunching and shrinking effect of the high-pressure water flow.

[0052] Further, in some embodiments of the present disclosure, the nozzle 210 is designed in a rectangular structure to have a regular high-pressure water flow pattern, and it should be noted that the width of the rectangular structure nozzle 210 is 0.08-0.12 mm, and the length is 6.5-7.5 mm. This size range can make the water flow form a uniform linear water flow at the nozzle 210, and have enough impact force to achieve the scattering effect on the soil layer. And for the structure of the nozzle 210, if its area is larger, that is, the width is wider or the length is longer, the high-pressure water flow emitted by the nozzle 210 can cover a larger area, but its impact force will decrease, which will weaken its scattering effect on the soil layer and structural layer. In the cutting process of the rotary cutting body 10, there is still a large resistance effect, which makes it difficult to achieve the purpose of improving the digging efficiency. If the area is smaller, that is, the width or length of the nozzle 210 is reduced, the high-pressure water flow emitted by the nozzle 210 has enough impact force to meet the scattering of the soil layer and structural layer. However, due to the smaller emission area, in order to realize the smooth operation of the water flow assisted pile machine drill bit, more water outlets 20 and pipeline structures need to be set, which will greatly increase the production cost of the water flow assisted pile machine drill bit. At the same time, the more complex structure will also increase the risk of failure of the water flow assisted pile machine drill bit, which will increase the maintenance cost.

[0053] In order to realize the smooth water supply of each water outlet 20, the water supply pipeline structure of the water flow assisted pile machine drill bit is designed as follows: Figure 1 and Figure 9As shown, in some embodiments of the present disclosure, the water flow assisted pile machine drill bit further comprises a high-pressure water pipe system 30 mainly comprising a main pipe 310, a flow distributor 320 and branch pipes 330, wherein the main pipe 310 is connected with a high-pressure pump station to provide high-pressure water flow for the entire high-pressure water pipe system 30, and the flow distributor 320 is arranged at the end of the main pipe 310 to collect, equalize and distribute the high-pressure water flow in the main pipe 310 to at least two branch pipes 330, and it should be noted that the flow distributor 320 can also be replaced by a welded flow distributor or an independent water supply pipe. The branch pipes 330 are used to guide the high-pressure water flow to the water outlets 20 arranged at various positions, and at least one water outlet 20 is arranged at the end of each branch pipe 330 to spray high-pressure water flow, which can directly impact or flow to the soil layer position that needs to be cut by the rotary cutting body 10, and wet the soil layer to make the soil layer more uniform and soft, thereby reducing the problem of excessive impact on the rotary cutting body 10 due to the higher local hardness of the soil layer, which can cause damage to the rotary cutting body 10. The arrangement of the high-pressure water pipe can set the water outlets 20 on the periphery of the rotary cutting body 10 at different positions in the water flow assisted pile machine drill bit through the branch pipes 330, forming a network structure, and then meeting the requirements of wetting and flushing the bottom layer area of the different rotary cutting bodies 10 through the supply of a single high-pressure pump station. In addition, after the rotary cutting body 10 is expanded in the water flow assisted pile machine drill bit, the water outlets 20 can be arranged at the preset positions by adding branch pipes 330 in the flow distributor 320 on the main pipe 310, thereby realizing the structural expansion requirement of the water flow assisted pile machine drill bit.

[0054] It should be noted that the flow distributor 320 can also be arranged on the branch pipe 330 to continue branching to form a network structure, and the water outlets 20 can be arranged on the branch pipe 330 at the preset positions.

[0055] Further, the present application also provides a pile machine device, which is provided with at least one set of the water flow assisted pile machine drill bit provided by any one of the above embodiments. It should be noted that the water flow assisted pile machine drill bit has the above technical effects, so the pile machine device also has the above technical effects, which will not be described herein.

[0056] The terms "comprising" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can include steps or units not listed.

[0057] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended 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 flow assisted pile driver drill bit, characterized by, The rotary cutting body (10) is provided with at least one group, and the water outlet (20) is provided with at least one group.

2. The water jet assisted pile driver bit of claim 1, wherein, The water outlet (20) is provided with at least one group.

3. The water jet assisted pile driver bit of claim 1, wherein, The rotary cutting body (10) is provided with at least two groups, and at least one group of the water outlet (20) is arranged between the adjacent two groups of the rotary cutting body (10).

4. The water jet assisted pile driver bit of claim 3, wherein, At least one of the water outlets (20) can adjust the opening and closing state and the flow.

5. The water jet assisted pile driver bit of claim 3, wherein, The sensor is used for detecting the soil layer state which needs to be excavated by the rotary cutting body (10), and adjusting the flow output of the water outlet (20).

6. The water jet assisted pile driver bit of claim 5, wherein, The projection of the water outlet (20) on one side of the rotary cutting body (10) is located in the coverage range of the rotary cutting body (10) along the rotation axis direction of the rotary cutting body (10).

7. The water jet assisted pile driver bit of claim 1, wherein, The water outlet (20) comprises a nozzle (210), and the water outlet (20) is internally provided with a pressurization structure which is communicated to the nozzle (210).

8. The water jet assisted pile driver bit of claim 1, wherein, The water outlet (20) comprises a water inlet channel (220), the first end (2210) of the water inlet channel (220) is communicated to the water outlet (20), the second end (2220) of the water inlet channel (220) is used for receiving high-pressure water, and the flow cross section of the first end (2210) of the water inlet channel (220) is smaller than that of the second end (2220).

9. The water jet assisted pile driver bit of claim 8, wherein, The water flow auxiliary pile machine drill bit comprises at least one group of the water flow auxiliary pile machine drill bit.

10. A pile driving apparatus, characterized by ​

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