Drill bit of three-shaft mixer

Abstract

The utility model relates to a three-shaft mixer drill bit which comprises a drill rod, a cone-shaped front guide structure is arranged at the front end of the drill rod, diamond particles are inlaid on the surface of the front guide structure and are arranged in a honeycomb shape, a soil loosening structure is arranged behind the front guide structure, and a main cutting structure is arranged behind the soil loosening structure to process chippings. The deslagging structure is arranged behind the main cutting structure to avoid residue attachment, the connector is arranged on the rear side of the main cutting structure and used for being connected with a piling frame, and the ultrasonic transducer is arranged on the rear side of the drill rod. The front guide structure can have certain strength through diamond particles, the conical design is beneficial to enhancing impact force, operation on a hard stratum is more convenient, and the soil layer is subjected to primary treatment through the soil loosening structure and then subjected to secondary treatment through the main cutting structure; the main cutting structure is prevented from making direct contact with large-particle soil, the problems that abrasion is fast and stirring is uneven are solved, and the problem that the drill bit is prone to being blocked is solved through the arrangement of the ultrasonic transducer and the deslagging structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of three -axis mixing pile, concretely relates to a three -axis mixer drill bit. BACKGROUND

[0002] In recent years, with the rapid formation of urban rail transit network, various forms of complex deep foundation pit engineering have appeared. However, due to the complex geological environment conditions and construction conditions in various regions, there are many influencing factors in the interaction between deep foundation pit excavation and adjacent bridges, existing underground structures and buildings of different foundation types. Among them, the three-axis mixing pile is a kind of construction technology for foundation treatment and foundation pit support, which belongs to a kind of long spiral pile. It drives three spiral drill holes at the same time through the pile machine, injects cement or other solidifying materials into the soil and fully mixes them, so that the cement and soil have physical and chemical reaction, thereby improving the strength and stability of the foundation. The traditional three-axis mixer construction has limitations, the drill bit has low efficiency when encountering hard stratum, the drill bit is easy to block, the energy consumption is high, the construction is more difficult, the spiral pile is quickly worn, and the mixing is uneven.

[0003] In summary, the prior art has the problems of fast wear, uneven mixing, low efficiency when encountering hard stratum, and easy blockage of the drill bit. CONTENT OF THE UTILITY MODEL

[0004] The purpose of this section is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the utility model aims at providing a three-axis mixer drill bit, which can solve the problems of fast wear, uneven mixing, low efficiency when encountering hard stratum and easy blockage of the drill bit in the prior art. The utility model provides a three-axis mixer drill bit, which comprises a drill rod, a conical front guide structure is arranged at the front end of the drill rod, diamond particles are inlaid on the surface of the front guide structure, the diamond particles are arranged in a honeycomb shape, a soil loosening structure is arranged behind the front guide structure, a main cutting structure is arranged behind the soil loosening structure to process the debris, a residue discharge structure is arranged behind the main cutting structure to avoid residue adhesion, a joint is arranged at the rear side of the main cutting structure to be connected with a pile driver, and an ultrasonic transducer is arranged at the rear side of the drill rod.

[0006] Optionally, the particle size of the diamond particles on the front guide structure is 2-3mm, and the density is 15 per cubic centimeter.

[0007] Optionally, the soil loosening structure comprises a stacked spiral layer between the inner core and the shell, the shell is a combination of a cylinder and a hammer body, the hammer body is an arc structure, the hammer body is away from the drill rod, the surface of the shell is covered with hydroxyapatite, the stacked spiral layer is a fiber layer arranged in a highly orderly spiral, and the inner core is made of an alloy.

[0008] Optionally, the main cutting structure is a wave-shaped blade wing with an inclination angle of 40-50 degrees, and the number of the wave-shaped blade wing is four, which are uniformly distributed at a position 60cm behind the soil loosening structure.

[0009] Optionally, the residue discharging structure comprises a coating layer and a spiral turn, the coating layer is made of super-hydrophobic material, and the spiral turn is an Archimedes spiral turn with an angle of 30 degrees.

[0010] Optionally, the distance between the leading structure and the soil loosening structure is 40cm, the distance between the residue discharging structure and the main cutting structure is 40cm, and the distance between the residue discharging structure and the joint is 3cm.

[0011] Optionally, the side surface of the shell and the side surface of the drill rod are secondarily reinforced by a support frame, the support frame and the two side surfaces form a triangle, and the inside of the support frame is welded to the side surfaces by support springs.

[0012] In summary, the utility model has at least one of the following beneficial effects:

[0013] The diamond particles can make the leading structure have a certain strength, the conical design is conducive to enhancing the impact force and facilitating the operation on hard strata, the soil layer is preliminarily treated by the soil loosening structure and then secondarily treated by the main cutting structure, the problem of fast abrasion and uneven stirring is solved by avoiding the direct contact between the main cutting structure and the large-particle soil, and the problem of easy clogging of the drill bit is solved by arranging the ultrasonic transducer and the residue discharging structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Fig. 1 It is a whole structure schematic view of a three-shaft mixer drill bit of the utility model;

[0016] Fig. 2 It is a residue discharging structure bottom view of a three-shaft mixer drill bit of the utility model;

[0017] Fig. 3 It is a soil loosening structure sectional view of a three-shaft mixer drill bit of the utility model;

[0018] List of figures: 1, drill rod; 2, ultrasonic transducer; 3, joint; 4, deslagging structure; 5, main cutting structure; 6, soil loosening structure; 7, front guide structure; 8, spiral turn; 9, coating layer; 10, support frame; 11, support spring; 12, stacked spiral layer; 13, outer shell; 14, inner core. DETAILED DESCRIPTION

[0019] The drawings will be described below Figs. 1-3 The utility model is further explained in detail.

[0020] Embodiment one, refer to Figs. 1-3 , in order to be able to solve the problem of abrasion fast, stirring uneven, low efficiency when meeting hard stratum, drill bit is easy to block in the prior art, the utility model discloses a three-shaft mixer drill bit, including, drill rod 1, the front end of drill rod 1 is equipped with the front guide structure 7 of the conical body shape of the through mouth, the front guide structure 7 surface inlays diamond particle, diamond particle particle size 2-3mm, density is 15 per cubic centimeter, adopts honeycomb arrangement.The conical body shape of front guide structure 7 is more easily drilled than cylindrical shape, but also means that abrasion problem, therefore the present application is provided with the diamond particle of honeycomb arrangement on the side wall surface of front guide structure 7, because honeycomb design makes the extrusion and deformation ability of originally hard diamond enhance, simultaneously the design of honeycomb has the characteristics of light weight can effectively avoid abrasion and the disadvantage of head heavy foot light of drill rod 1, therefore can meet the drilling demand of hard ground, the scope of application is wider, drill rod 1 is hollow cylinder, is used for installing grouting pipe.

[0021] The front guide structure 7 rear 40cm is soil loosening structure 6, soil loosening structure 6 includes the stacked spiral layer 12 between inner core 14 and outer shell 13, the outer shell 13 is the combination of cylinder and hammer body, the hammer body is arc structure, the hammer body part is away from drill rod 1, the surface of outer shell 13 is covered with hydroxyapatite, the stacked spiral layer 12 is the fiber layer of high and neat spiral arrangement, the material of inner core 14 is alloy.The side of outer shell 13 and the side of drill rod 1 are secondarily reinforced by support frame 10, support frame 10 and two sides present triangle, inside is welded with side by support spring 11.Soil loosening structure 6 uses hydroxyapatite to ensure the hardness of soil loosening structure 6, the hammer body is arc structure and can reduce contact area concentrated impact force, improve work efficiency, the fiber layer arrangement of stacked spiral layer 12 is similar to Buleigen structure, can disperse impact force to the whole soil loosening structure 6 instead of locally, is not easy to cause local damage, and the stability and wear resistance are stronger.Soil loosening structure 6 stability is further determined by support frame 10 and internal support spring 11, to facilitate the service life of the device is enhanced.

[0022] The main cutting structure 5 is arranged behind the soil loosening structure 6 by 60 cm, is used for processing the debris, the main cutting structure 5 is composed of four wave-shaped blades with an inclination angle of 40 °-50 °, the residue discharge structure 4 is arranged behind the main cutting structure 5 by 40 cm, is used for avoiding the residue adhesion, the residue discharge structure 4 includes a paint layer 9 and a spiral 8, the material of the paint layer 9 is super-hydrophobic material, and the spiral 8 is an Archimedes spiral with a 30 ° angle of rise. The joint 3 is arranged at the rear side of the main cutting structure 5 by 3 cm to be connected with the pile frame, and the rear bottom of the drill rod 1 is provided with an ultrasonic transducer 2. The wave-shaped blade can cut or disperse stress at high speed impact, reduce self-damage, and the inclination angle of 40 °-50 ° is to ensure the quality of stirring. The main cutting structure 5 is laser cladded with a tungsten carbide cobalt coating with a thickness of 0.6 mm on the surface, so as to enhance the wear resistance and corrosion resistance of the main cutting structure 5, and further prolong the service life of the device. The inside surface of the rear bottom of the drill rod 1 is provided with an ultrasonic transducer 2, and the ultrasonic transducer 2 can break the mud ball by cavitation effect to avoid the drill bit blockage.

[0023] Specific implementation principle: when the utility model is used, the joint 3 is inserted into the pile frame, the front guide structure 7 can be used to throw away the hard soil layer and effectively carry out preliminary stirring due to the high hardness, the soil loosening structure 6 further loosens the soil, the main cutting structure 5 is designed to stir the cement and the soil debris to make the cement uniform, the residue discharge structure 4 is arranged to avoid the residual soil from being brought back to the ground, and the ultrasonic transducer 2 can break the mud ball to avoid the drill bit blockage and affect the work efficiency.

[0024] The above are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A tri-axial mixer drill bit, characterized by, Including, drill pipe (1), the front end of drill pipe (1) is equipped with conical shape's front guide structure (7), the surface of front guide structure (7) is inlaid diamond particle, adopts honeycomb arrangement, the rear of front guide structure (7) is for loosening soil structure (6), main cutting structure (5) is set in loosening soil structure (6) rear and processes the debris, the rear of main cutting structure (5) is set up and is avoided residual slag adhesion, joint (3) is set in the rear side of main cutting structure (5) and is used to connect with piling frame, the rear side of drill pipe (1) is provided with ultrasonic transducer (2).

2. A three-axle mixer bit according to claim 1, wherein, The particle size of the diamond particles on the front guide structure (7) is 2-3mm, and the density is 15 per cubic centimeter.

3. A three-axis mixer drill bit according to claim 1, wherein, The loosening soil structure (6) includes a stack spiral layer (12) between an inner core (14) and an outer shell (13), the outer shell (13) is a combination of a cylinder and a hammer body, the hammer body is an arc structure, the hammer body part is away from the drill pipe (1), the surface of the outer shell (13) is covered with hydroxyapatite, the stack spiral layer (12) is a fiber layer arranged in a highly uniform spiral, and the inner core (14) is made of an alloy.

4. A three-axis mixer drill bit according to claim 1, wherein, The main cutting structure (5) is a wave-shaped blade with an inclination angle of 40°-50°, and the number is four, which are uniformly distributed at a position 60cm behind the loosening soil structure (6).

5. A three-axis mixer drill bit according to claim 1, wherein, The slag discharge structure (4) includes a coating layer (9) and a spiral coil (8), the material of the coating layer (9) is a super-hydrophobic material, and the spiral coil (8) is an Archimedes spiral coil with a 30° rise angle.

6. A three-axis mixer drill bit according to claim 1, wherein, The distance between the front guide structure (7) and the loosening soil structure (6) is 40cm, the distance between the slag discharge structure (4) and the main cutting structure (5) is 40cm, and the distance between the slag discharge structure (4) and the joint (3) is 3cm.

7. A three-axle mixer bit according to claim 3, wherein, The side surface of the outer shell (13) and the side surface of the drill pipe (1) are secondarily reinforced by a support frame (10), the support frame (10) and the two side surfaces form a triangle, and the inside is welded to the side surface by a support spring (11).

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