Stirring pile machine with three-dimensional cutting and stirring drill bit

Abstract

The utility model relates to the technical field of dike anti-seepage mixing pile construction, in particular to a mixing pile machine with a three-dimensional cutting mixing drill bit, which comprises a machine body underframe platform and a guide frame, hydraulic support legs are arranged on the side edge of the machine body underframe platform, and a winch unit is arranged on one side of the machine body underframe platform. A traction frame is arranged at the top of the guide rack, and a lifting rope and an auxiliary control rope are arranged on the traction frame; a guide rail is arranged on one side of the guide rack, a power head and a stabilizing seat are arranged on the guide rail in a sliding mode, an output shaft is arranged on the lower side of the power head, a stirring drill bit is arranged at the lower end of the output shaft, and the stirring drill bit comprises a shaft pipe, drill rod blades and comb frame grids. The comb frame is additionally arranged outside the drill bit, the stirring drill bit is combined inside and outside, three-dimensional thorough cutting and stirring of a soil body within the action range of the drill bit are achieved, cement grout and the soil body are mixed more evenly, strength difference is effectively reduced, and stability and reliability of pile forming quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of dike seepage prevention mixing pile construction technology, and in particular to a mixing pile machine with a three-dimensional cutting and mixing drill bit. Background Technology

[0002] In the field of water conservancy engineering, cement mixing pile anti-seepage wall technology is a common means of solving seepage problems, and it has achieved remarkable results in dikes, dam foundations, sluice gate foundations, and other parts, with broad application prospects. This technology uses cement as the main curing agent. Cement is sprayed into the soil through a mixing pile machine and thoroughly mixed with it to form piles. The piles are then overlapped to form a continuous wall according to the design wall thickness requirements.

[0003] However, in the existing technology, the traditional single-axis mixing drill bit has shortcomings: its mixing blades are arranged in parallel up and down, which can only mix the soil in one dimension. It is easy to get stuck and the mixing is uneven, resulting in a large difference in the mixing strength between cement slurry and soil, which makes it difficult to meet the construction requirements. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a mixing pile machine with a three-dimensional cutting and mixing drill bit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mixing pile driver with a three-dimensional cutting and mixing drill bit includes a base platform and a guide frame. The base platform has hydraulic support legs on its side. The guide frame is located on one side of the base platform, and a winch unit is located on the other side of the base platform. A traction frame is located on the top of the guide frame, and a lifting cable and an auxiliary control cable are mounted on the traction frame. A guide rail is located on one side of the guide frame, and a power head and a stabilizing seat are slidably mounted on the guide rail. An output shaft is located below the power head and passes through the stabilizing seat. A mixing drill bit is located at the lower end of the output shaft. The mixing drill bit includes a shaft tube, drill rod blades, and a toothed frame.

[0007] Preferably, the fuselage underframe platform is equipped with a cockpit, a power supply box and a hydraulic control box on its upper side; the fuselage underframe platform and the guide frame are equipped with tilt sensors, the power head is equipped with a rotary encoder, and the cockpit is equipped with a programmable logic controller.

[0008] Preferably, the upper part of the guide frame is provided with a connecting rod to one side of the fuselage base platform, and the lower side of the fuselage base platform is provided with a powered track.

[0009] Preferably, the winch unit is equipped with winch winding reels corresponding to the lifting cable and the auxiliary control cable, one end of the lifting cable is connected to the power head, and one end of the auxiliary control cable is connected to the stabilizing seat.

[0010] Preferably, the power head is provided with at least one set of variable frequency motors, a reducer is provided between the variable frequency motors and the output shaft, and the middle of the stabilizer is provided with a clearance hole adapted to the output shaft.

[0011] Preferably, the output shaft is provided with two sets of spray channels, and the upper and lower sides of the shaft tube are respectively provided with spray nozzles, and the two sets of spray channels are respectively provided with two sets of spray nozzles.

[0012] Preferably, the drill pipe blades include outer blades and inner blades, and the outer blades and inner blades are provided in multiple sets and are uniformly welded to the outside of the shaft tube; the comb frame includes a cage frame and cage frame blades, and the bottom of the shaft tube is provided with a reaming drill bit and a drilling drill bit.

[0013] The beneficial effects of this utility model are as follows:

[0014] Compared with the existing technology, this utility model adds a toothed comb frame to the outside of the drill bit, and combines the inner and outer mixing drill bit to achieve three-dimensional and thorough cutting and mixing of the soil within the range of the drill bit's action. This makes the cement slurry and soil mix more evenly, effectively reduces strength differences, and improves the stability and reliability of pile quality. At the same time, it adopts an intelligent control system to precisely control the construction process, reduce human factors' interference with the construction process and operational errors, and ensure the quality of pile formation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a mixing pile machine with a three-dimensional cutting and mixing drill bit proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the main structure of a mixing pile machine with a three-dimensional cutting and mixing drill bit proposed in this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the mixing drill bit of a mixing pile machine with a three-dimensional cutting and mixing drill bit proposed in this utility model.

[0018] In the diagram: 1. Base frame platform; 2. Hydraulic support leg; 3. Winch unit; 31. Lifting cable; 32. Auxiliary control cable; 4. Connecting rod; 5. Guide frame; 6. Traction frame; 7. Power head; 71. Output shaft; 8. Stabilizer seat; 9. Mixing drill bit; 91. Shaft tube; 92. Outer blade; 93. Cage frame; 931. Cage frame blade; 94. Inner blade; 95. Grouting nozzle; 96. Hole reamer; 97. Drilling drill bit. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Reference Figure 1-3 A mixing pile machine with a three-dimensional cutting and mixing drill bit includes a machine body base platform 1 and a guide frame 5. The machine body base platform 1 is equipped with a cab, a power supply box and a hydraulic control box. The cab is equipped with a programmable logic controller (PLC). Through system programming, it can control the construction equipment to operate according to the set construction process sequence and make logical judgments on the signals transmitted by the sensors.

[0021] Tilt sensors are installed on the base frame platform 1 and guide frame 5 to monitor the verticality of the pile driving, correct the levelness of the four corners of the base frame platform 1 and the verticality of the guide frame 5, meet the specifications and minimize the deviation, and ensure the effective thickness of the wall bottom overlap.

[0022] The machine base platform 1 is equipped with hydraulic support legs 2 on the side. The tilt sensor converts the measured data into electrical signals and transmits them to the programmable logic controller (PLC) for processing. Then, through the hydraulic control box, the hydraulic support legs 2 are controlled to adjust their height to ensure that the pile driver is in place and that the mixing pile is vertical.

[0023] A connecting rod 4 is provided on the upper part of the guide frame 5 and one side of the machine body base platform 1 to improve the stability of the guide frame 5. A power track is provided on the lower side of the machine body base platform 1 to quickly move the pile driver and make position adjustments, making construction more convenient.

[0024] The guide frame 5 is located on one side of the machine body base platform 1, and the winch unit 3 is located on the other side of the machine body base platform 1. The guide frame 5 is equipped with a traction frame 6 at the top, and the traction frame 6 is equipped with a lifting cable 31 and an auxiliary control cable 32. The winch unit 3 is equipped with winch winding wheels corresponding to the lifting cable 31 and the auxiliary control cable 32, which are used to control the lifting cable 31 and the auxiliary control cable 32 to be wound and released separately.

[0025] A guide rail is provided on one side of the guide frame 5. A power head 7 and a stabilizing seat 8 are slidably mounted on the guide rail. An output shaft 71 is provided on the lower side of the power head 7. At least one set of variable frequency motors is provided inside the power head 7. A reducer is provided between the variable frequency motors and the output shaft 71. A rotary encoder is provided on the power head 7 to monitor the depth and speed of the power head 7. One end of the lifting cable 31 is connected to the power head 7 to control the lifting and lowering of the power head 7 and adjust the construction depth.

[0026] One end of the auxiliary control cable 32 is connected to the stabilizing seat 8. The stabilizing seat 8 has a clearance hole in the middle that is compatible with the output shaft 71. The output shaft 71 passes through the stabilizing seat 8. The stabilizing seat 8 actively adjusts its height as the power head 7 rises and falls, supporting the output shaft 71 and preventing the output shaft 71 from being too long, which would cause the bottom to tilt. This ensures that the drill bit is positioned and aligned with the center of the hole and the axis of the anti-seepage wall, meeting the specifications and minimizing the deviation.

[0027] The lower end of the output shaft 71 is provided with a mixing drill bit 9. The mixing drill bit 9 includes a shaft tube 91, drill rod blades and a toothed comb frame. The bottom of the shaft tube 91 is provided with a hole-reaming drill bit 96 and a hole-drilling drill bit 97. The drill rod blades include outer blades 92 and inner blades 94. The toothed comb frame includes a cage frame 93 and a cage frame blade 931. A toothed comb frame is added to the outside of the drill bit. The cage frame blades 931 and the inner blades 94 are arranged in a staggered toothed comb shape. The mixing drill bit 9 is combined inside and out to achieve three-dimensional and thorough cutting and mixing of the soil within the range of the drill bit.

[0028] The output shaft 71 is provided with two sets of spraying channels, and the shaft tube 91 is provided with spraying nozzles 95 on the upper and lower sides respectively. The distance between the upper and lower spraying nozzles 95 plus the overlap length is 0.2m to 0.5m. The two sets of spraying channels are respectively set with two sets of spraying nozzles 95.

[0029] Multiple sets of outer blades 92 and inner blades 94 are provided and are evenly welded to the outside of the shaft tube 91. The outer blades 92 are located on the outside of the cage frame 93, and the inner blades 94 are located on the inside of the cage frame 93.

[0030] A seamless tube with a diameter of φ219mm×30mm is used as the shaft tube 91 to transmit torque and top pressure. Two DN50 core tubes are arranged inside to transmit cement slurry to the mixing drill bit 9, serving as a grouting channel. The cage frame 93 is 2670mm long and has a rotation diameter of 720mm. The reaming drill bit 96 has a rotation diameter of 680mm. That is, a resistance bar with a width of 20mm is added to one side of the cage frame 93 to increase the rotation resistance of the cage frame 93 after the drill bit enters the soil. The cage frame 93 is 30mm thick and the resistance bar is 16mm thick. The axial clearance between the inner blade 94 of the drill rod and the inner blade 931 of the cage frame is 40mm and the radial clearance is 10mm.

[0031] In this embodiment, after measurement and layout, the pile driver is positioned. Each time the mixing pile driver is moved, the positioning operation is carried out according to the predicted pile position using plane geometry. After positioning, the pile driver is checked and leveled.

[0032] Ordinary Portland cement is used and stored on-site in a horizontal cement silo. The water-cement ratio is set to 0.5. After the slurry mix ratio is selected, water is first added to the mixer, and then the cement is fed into the horizontal cement silo by PLC control to start mixing and slurry preparation. The slurry is poured into the aggregate hopper and screened for filtration. After filtration, it is placed in the slurry tank for later use.

[0033] Drilling and grouting mixing:

[0034] Forward drilling: No grouting is used during the entire drilling process, and the number of cuts is not counted. The rotation speed is 16 rpm at the power frequency. When encountering hard soil layers, grouting and water are sprayed to reduce the drilling speed and then continue drilling to the bottom of the pile.

[0035] Reverse and lift the shotcrete for re-mixing: lower the shotcrete, and then reverse and lift it 5m at a frequency converter speed of 32rpm.

[0036] Forward rotation and drilling re-mixing: Without spraying grout, rotate the drill forward at 32 rpm for 5 m;

[0037] Forward rotation of pile bottom fixed spraying: switch to upper spraying, rotate forward at 32 rpm at the pile bottom for 1 minute; the whole process can ensure the number of blade cuts at the pile bottom, and also allow time for grout to come out of the upper spraying port;

[0038] Reverse lifting and grouting: Continue to start the grouting and reverse the lifting motion at a frequency converter speed of 32 rpm to form the pile; the lifting speed, rotation speed and grouting rate should be based on the principle of meeting the number of cuts and the designed grouting volume.

[0039] After the pile driver is moved, an appropriate amount of clean water is injected into the aggregate hopper, the grout pump is turned on, and all the remaining cement slurry in the pipelines is cleaned until it is basically clean to prevent blockage of the grout delivery pipeline; at the same time, the soft soil clumps adhering to the mixing drill bit 9 are cleaned, and the construction is completed.

[0040] After completing the construction of one pile, move the piling machine to the next pile location and repeat the above steps to construct the next pile.

[0041] In addition, to achieve intelligent control, a frequency converter can be installed on the mud pump motor to achieve precise control of the slurry flow rate, and the flow rate of the slurry being delivered can be monitored and measured by a flow meter.

[0042] When the power head 7 accelerates upward, the rotary encoder inputs an acceleration electrical signal to the PLC. The PLC then outputs a corresponding electrical signal to the mud pump frequency converter based on preset logic, thereby increasing the mud pump's discharge flow rate. Simultaneously, the mud pump's discharge flow rate is monitored in real time by a flow meter.

[0043] The flow meter converts the monitored flow data into an electrical signal and feeds it back to the PLC. The PLC performs logical analysis on these feedback signals again. If a deviation is found, the PLC will immediately fine-tune the frequency converter to ensure that the flow rate of the mud pump matches the lifting speed of the power head 7, thus ensuring the uniformity of pile formation.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

Claims

1. A mixing pile machine with a three-dimensional cutting and mixing drill bit, comprising a machine body base platform (1) and a guide frame (5), characterized in that, The fuselage base platform (1) is provided with hydraulic support legs (2) on the side, the guide frame (5) is set on one side of the fuselage base platform (1), the other side of the fuselage base platform (1) is provided with a winch unit (3), the top of the guide frame (5) is provided with a traction frame (6), and the traction frame (6) is provided with a lifting cable (31) and an auxiliary control cable (32). The guide frame (5) is provided with a guide rail on one side, and a power head (7) and a stabilizing seat (8) are slidably provided on the guide rail. An output shaft (71) is provided on the lower side of the power head (7), and the output shaft (71) passes through the stabilizing seat (8). A stirring drill bit (9) is provided at the lower end of the output shaft (71). The stirring drill bit (9) includes a shaft tube (91), drill rod blades, and a toothed comb frame.

2. The mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 1, characterized in that, The fuselage underframe platform (1) is equipped with a cockpit, power supply box and hydraulic control box on its upper side; The fuselage base platform (1) and guide frame (5) are equipped with tilt sensors, the power head (7) is equipped with a rotary encoder, and the cockpit is equipped with a programmable logic controller.

3. A mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 1, characterized in that, The upper part of the guide frame (5) is connected to one side of the fuselage base platform (1) by a connecting rod (4), and the lower side of the fuselage base platform (1) is provided with a powered track.

4. A mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 1, characterized in that, The winch unit (3) is equipped with winch winding wheels corresponding to the lifting cable (31) and the auxiliary control cable (32). One end of the lifting cable (31) is connected to the power head (7), and one end of the auxiliary control cable (32) is connected to the stabilizer (8).

5. A mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 1, characterized in that, The power head (7) is equipped with at least one set of variable frequency motors, and a speed reducer is provided between the variable frequency motor and the output shaft (71). The middle part of the stabilizer (8) is provided with a clearance hole adapted to the output shaft (71).

6. A mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 5, characterized in that, The output shaft (71) is provided with two sets of spraying channels, and the shaft tube (91) is provided with spraying nozzles (95) on the upper and lower sides respectively. The two sets of spraying channels are respectively set with the two sets of spraying nozzles (95).

7. A mixing pile machine with a three-dimensional cutting and mixing drill bit according to claim 6, characterized in that, The drill pipe blades include outer blades (92) and inner blades (94), and the outer blades (92) and inner blades (94) are provided in multiple sets and are uniformly welded to the outside of the shaft tube (91); The comb frame includes a cage frame (93) and cage frame blades (931), and the bottom of the shaft tube (91) is provided with a reaming drill bit (96) and a drilling drill bit (97).

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