CN215889917U

CN215889917U - Drill bit of cement mixing pile machine

Info

Publication number: CN215889917U
Application number: CN202122544268.XU
Authority: CN
Inventors: 关岩鹏; 梁涛; 钟建文; 张辉; 吴敏; 马世敏; 郭晓光; 郭密文; 张冬辉
Original assignee: Beijing Aerospace Foundation Engineering Co ltd; Spaceflight Building Design Research Institute Co ltd; China Aerospace Construction Group Co Ltd
Current assignee: Beijing Aerospace Foundation Engineering Co ltd; Spaceflight Building Design Research Institute Co ltd; China Aerospace Construction Group Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-02-22
Anticipated expiration: 2031-10-21

Abstract

The utility model provides a drill bit of a cement mixing pile machine, which comprises a central drill bit assembly connected to the lower end of a drill rod of the pile machine; the central drill bit assembly comprises a cone claw connected with the bottom end of a drill rod of the pile machine, a cone hinged at the lower part of the cone claw and inserts arranged on the outer surface of the cone; the gear claw is also provided with a slurry conveying channel which is communicated up and down; the lower part of the cone protrudes to the outer side of the lower part of the cone claw; the pile machine drill bit further comprises an inner blade assembly connected to the outer side of the cone claw and an outer blade assembly connected to the tail end of the inner blade assembly. The cement-soil mixing pile machine has the advantages of simple and reasonable structural design, good adaptability to gravel stratum, good rigidity, strength and wear resistance, long service life, capability of effectively improving the working efficiency of the cement-soil mixing pile machine, production cost saving, simplified process and suitability for popularization and application.

Description

Drill bit of cement mixing pile machine

Technical Field

The utility model relates to the technical field of construction, in particular to a drill bit of a cement mixing pile machine.

Background

The drilling mode of the traditional drill bit of the cement soil mixing pile machine is basically spiral drilling, and is generally only suitable for stratums such as cohesive soil, silt, sand and the like, the drilling of the cement soil mixing pile in the gravel stratum is slow, particularly when the cement soil mixing pile meets the gravel stratum with large particle size and large density, the drill bit can not drill due to certain limitation of the structural design, even the drill bit can drill if the drill bit is forced to repeatedly crush the gravel with large particle size during the rotation process when the cement soil mixing pile machine passes through the gravel stratum and mud circulation process is carried out, and the drilling tool is easily worn or damaged prematurely, if the drilling mode of hole leading replacement, rotary drilling and gravel taking and the like is adopted to solve the problem, other construction machines need to be additionally introduced, so that the complexity of the process and the difficulty of mutual matching of the construction machines are increased, and the economic cost and the time cost are increased; however, if the problem is solved by frequently replacing a new drill bit, the production cost is increased, and the cement soil stirring efficiency is also seriously influenced; finally, the cement soil mixing pile has poor adaptability in gravel stratum.

Disclosure of Invention

The utility model aims to provide a drill bit of a cement-soil mixing pile machine, which aims to solve the problems that the drill bit of the traditional cement-soil mixing pile machine does not have the function of crushing gravel and has poor adaptability in gravel stratum, the drilling of gravel and cobbles is high in cost and complex in process, and a drilling tool is easy to wear or damage.

In order to solve the technical problem, the utility model provides a drill bit of a cement mixing pile machine, which comprises a central drill bit assembly connected to the lower end of a drill rod of the pile machine in a matching manner; the central drill bit assembly comprises a cone claw connected with the bottom end of a drill rod of the pile machine in a matching manner, a cone hinged to the lower part of the cone claw in a matching manner and inserted teeth arranged on the outer surface of the cone in a matching manner; the gear claw is also provided with a slurry conveying channel which is communicated up and down in a matching way; the lower part of the cone protrudes to the outer side of the lower part of the cone claw; the pile machine drill bit further comprises an inner blade assembly and an outer blade assembly, wherein the inner blade assembly is connected with the outer side of the cone claw in a matched mode, and the outer blade assembly is connected with the tail end of the inner blade assembly in a matched mode.

Preferably, the dental gear claw is provided with an accommodating cavity from the center of the bottom in a matching manner; a bearing pin shaft is convexly arranged on the inner cavity wall at the top end of the accommodating cavity in a matched manner; the roller cone is hinged on the roller cone shaft in a matching manner.

Preferably, the bearing pin is a cylindrical shaft, and balls are inlaid in the outer wall of the bearing pin along the circumferential direction in a matching manner; the roller cone is hinged with the bearing pin in a matching mode through the ball.

Preferably, the bearing pin obliquely protrudes towards the oblique lower part of the inner cavity wall at the top end of the accommodating cavity; the cone is of a cone structure, and an outer cone on the lower side of the cone is obliquely protruded towards the outer side of the lower part of the cone claw.

Preferably, the inserts are made of wear-resistant hard alloy materials and are uniformly embedded in the outer conical surface of the cone.

Preferably, the inner blade assembly consists of a blade shaft inner rod, a blade shaft outer ring and a cutting pick; the inner rod of the blade shaft is connected to the outer wall of the cone pulley claw in an inclined mode; the outer ring of the blade shaft is sleeved outside the inner rod of the blade shaft in a matching manner and is hinged with the inner rod of the blade shaft; the cutting teeth are uniformly and convexly arranged on the outer wall of the blade shaft outer ring in a matched mode.

Preferably, the outer blade assembly consists of a drilling blade and a relieving; the drilling blade is connected to the tail end of the blade shaft inner rod in a matching manner; the relieving teeth are uniformly distributed along the length direction of one side surface of the drilling blade; the head of the relieving is protruded to the outer side of the drilling blade.

By adopting the technical scheme, the utility model has the following beneficial effects:

the drill bit of the cement mixing pile machine provided by the utility model is ingenious and reasonable in structural design, is provided with the central drill bit assembly, the inner blade assembly and the outer blade assembly, can apply larger pressure on pebbles with large particle size through the structural design of the cone, the insert of the central drill bit assembly, the picks of the inner blade assembly and the like, the pebbles with large particle size can be fractured and broken into gravels with small particle size, and the gravels with small particle size are suspended in slurry through the buoyancy of high-density slurry sprayed out of the slurry conveying channel designed on the cone claw and the drag force generated by slurry circulation, so that the situation that the pebbles with large particle size are deposited at the bottom of a pile hole and cannot be effectively discharged, the drill bit is forced to repeatedly break the pebbles with large particle size, and the gravels with large particle size are worn or damaged prematurely is avoided. The cement-soil mixing pile machine has the advantages of good use effect, function of breaking gravel and eggs, good adaptability to gravel stratum, good rigidity, strength and wear resistance, long service life, capability of effectively improving the working efficiency of the cement-soil mixing pile machine, no need of additionally introducing other construction machinery in the process of being matched with the pile machine, production cost saving, process simplification and suitability for popularization and application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic side view of a drill bit of the soil cement mixing pile machine of the present invention;

FIG. 2 is a bottom view of the drill of the soil cement mixing pile machine of the present invention;

FIG. 3 is a sectional view taken along the direction A-A' of the drill of the cement mixing pile machine of the present invention;

FIG. 4 is a B-B' direction cross-sectional view of a drilling blade of a drill bit of the soil cement mixing pile machine of the present invention;

FIG. 5 is a C-C' direction cross-sectional view of a drilling blade of the drill bit of the soil cement mixing pile machine of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to specific embodiments.

As shown in fig. 1 to 5, the drill of the soil cement mixing pile machine provided by this embodiment includes a center drill bit assembly 1, an inner blade assembly 2, and an outer blade assembly 3.

The central drill bit assembly 1 is positioned in the middle of a drill bit of the cement mixing pile machine, the upper part of the central drill bit assembly is fixedly connected with a drill rod 4, and the central drill bit assembly comprises a gear claw 11, a gear 12, a ball 13 and an insert 14.

The top end of the cone claw 11 is connected (rigidly connected) with the drill rod 4; wherein, the cone claw 11 is provided with an accommodating cavity 111 from the center of the bottom, and is provided with a bearing pin 112 uniformly and convexly along the circumferential direction of the inner cavity wall at the top end of the accommodating cavity 111 (in this embodiment, three bearing pins 112 are uniformly and convexly provided along the circumferential direction of the inner cavity wall at the top end of the accommodating cavity 111); the bearing pin 112 projects obliquely downward toward the inner cavity wall at the tip end of the accommodating cavity 111 (here, the bearing pin 112 is inclined at an angle of 30 ° to 60 ° with respect to the horizontal plane); the bearing pin 112 is a cylindrical shaft, and a circle of balls 13 are embedded in the outer wall of the cylindrical shaft along the circumferential direction in a matching manner; a slurry conveying channel 113 is formed from the center of the top of the cone claw 11 to the center of the bottom of the accommodating cavity 112 in a matching and penetrating manner; the upper end of the slurry conveying channel 113 is communicated with the inner hole of the drill rod 4, and the lower end is communicated with the accommodating cavity 111; the upper half section of the slurry conveying channel 113 is a section of wide conveying channel, and the lower half section is a section of narrow conveying channel; the slurry conveying channel 113 can spray high-density slurry, and the gravel with small particle size is suspended in the slurry through buoyancy and drag force generated by slurry circulation, so that the situation that the gravel with large particle size is deposited at the bottom of a pile hole to cause repeated breakage of the gravel and abrasion of a drilling tool by a drill bit is avoided.

The cone 12 is mounted on the lower portion of the cone claw 11 and has a cone structure, and a cone mounting groove is formed in the bottom of the cone and is mounted on the cone shaft 112 in a matching manner through the cone mounting groove (in this embodiment, three cones 12 are provided and are respectively mounted on the three cone shafts 112 in a matching manner); the inner groove wall of the cone mounting groove is connected with the bearing pin 112 in a matching way through the ball 13, and the ball 13 can increase the rotating efficiency of the cone 12 around the bearing pin 112; the outer conical surface of the cone 12 is uniformly embedded with inserts 14 and the lower outer conical surface is also obliquely protruded towards the lower outer side of the cone claw 11. In this embodiment, the cone 12 has three inner groove walls uniformly installed in the cone mounting groove

The insert 14 is made of wear-resistant hard alloy, and under the action of pressure transmitted by the drill rod 4, the insert 14 can generate larger pressure to a rock-soil body due to small contact area with the rock-soil body, so that gravel with larger particle size is crushed into gravel with smaller particle size.

The inner blade assembly 2 is connected to the central drill bit assembly 1 on one side and to the outer blade assembly 3 on the other side. The inner blade assemblies 2 are three groups which are uniformly distributed along the outer wall of the cone claw 11 of the central drill bit assembly 1, and each group of inner blade assemblies 2 consists of a blade shaft inner rod 21, a blade shaft outer ring 22 and cutting teeth 23; the blade shaft inner rod 21 is cylindrical and is connected (rigidly connected) to the outer wall of the lower end of the cone jaw 11 of the center bit assembly 1 in an inclined manner. The blade shaft outer ring 22 is cylindrical, is movably sleeved outside the blade shaft inner rod 21 in a matching manner, and can rotate (i.e. is hinged) around the blade shaft inner rod 21; the outer wall of the blade shaft outer ring 22 is uniformly provided with cutting teeth 23 in a protruding mode. When the drill bit of the cement soil mixing pile machine rotates, the outer ring 22 of the blade shaft directly contacts rock mass bodies such as gravel at the bottom of a drill hole and rolls around the inner rod 21 of the blade shaft on the rock mass, the cutting teeth 23 are made of wear-resistant hard alloy materials, and under the pressure effect transmitted by the drill rod 4, the cutting teeth 23 are small in contact area with the rock mass, so that large pressure on the rock mass can be generated, the gravel with large particle size is crushed into gravel with small particle size, and the characteristics that the drill bit of the traditional cement soil mixing pile machine mainly adopts spiral drilling and the function of crushing the gravel is weak are changed.

The outer blade assembly 3 also has three groups and is respectively connected to one side of the three groups of inner blade assemblies 2 in a matching way, and each group of outer blade assemblies 3 consists of a drilling blade 31 and a relieving 32. Wherein, the drilling blade 31 is sheet-shaped and is matched and connected with the tail end of the blade shaft inner rod 21 of the inner blade component 2; the whole drilling blade 31 forms an included angle of 15-45 degrees with the horizontal plane, and a plurality of relieving teeth 32 are uniformly distributed on one side surface along the length direction of the drilling blade; the heads of the plurality of relieved teeth 32 each project outward of the drilling blade 31. When the drill bit of the cement soil mixing pile machine rotates, the drilling blade 31 and the relieving 32 directly contact with rock soil bodies such as gravel at the bottom of a drill hole, and can directly cut into the rock soil bodies under the action of pressure and rotating force transmitted by the drill rod 4, and the relieving 32 is used for increasing the rigidity, strength and wear resistance of the drilling blade 31.

The gravel crushing device has simple and reasonable structural design, has the function of crushing gravel with small particle size, can crush gravel with large particle size into gravel with small particle size and suspend the gravel with small particle size in slurry, effectively avoids the situation that the drill bit is forced to repeatedly crush gravel with large particle size and the like are worn or damaged too early because the gravel with large particle size is deposited at the bottom of the pile hole, has good use effect, strong adaptability, good rigidity, strength and wear resistance and long service life, improves the working efficiency of the cement-soil mixing pile machine, and is suitable for popularization and application.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drill bit of a cement mixing pile machine comprises a central drill bit assembly which is connected to the lower end of a drill rod of the pile machine in a matching manner; the method is characterized in that: the central drill bit assembly comprises a cone claw connected with the bottom end of a drill rod of the pile machine in a matching manner, a cone hinged to the lower part of the cone claw in a matching manner and inserted teeth arranged on the outer surface of the cone in a matching manner; the gear claw is also provided with a slurry conveying channel which is communicated up and down in a matching way; the lower part of the cone protrudes to the outer side of the lower part of the cone claw;

the pile machine drill bit further comprises an inner blade assembly and an outer blade assembly, wherein the inner blade assembly is connected with the outer side of the cone claw in a matched mode, and the outer blade assembly is connected with the tail end of the inner blade assembly in a matched mode.

2. The drill of cement mixing pile machine according to claim 1, characterized in that: the tooth wheel claw is provided with an accommodating cavity from the center of the bottom in a matching manner; a bearing pin shaft is convexly arranged on the inner cavity wall at the top end of the accommodating cavity in a matched manner; the roller cone is hinged on the roller cone shaft in a matching manner.

3. The drill of cement mixing pile machine according to claim 2, characterized in that: the bearing pin shaft is a cylindrical shaft, and balls are inlaid in the outer wall of the bearing pin shaft along the circumferential direction in a matching manner; the roller cone is hinged with the bearing pin in a matching mode through the ball.

4. The drill of cement mixing pile machine according to claim 2, characterized in that: the bearing pin obliquely protrudes and extends towards the oblique lower side of the inner cavity wall at the top end of the accommodating cavity; the cone is of a cone structure, and an outer cone on the lower side of the cone is obliquely protruded towards the outer side of the lower part of the cone claw.

5. The drill of cement mixing pile machine according to claim 4, characterized in that: the insert is made of wear-resistant hard alloy materials and is uniformly embedded in the outer conical surface of the cone.

6. The drill of cement mixing pile machine according to claim 1, characterized in that: the inner blade component consists of a blade shaft inner rod, a blade shaft outer ring and a cutting pick; the inner rod of the blade shaft is connected to the outer wall of the cone pulley claw in an inclined mode; the outer ring of the blade shaft is sleeved outside the inner rod of the blade shaft in a matching manner and is hinged with the inner rod of the blade shaft; the cutting teeth are uniformly and convexly arranged on the outer wall of the blade shaft outer ring in a matched mode.

7. The drill of cement mixing pile machine according to claim 6, characterized in that: the outer blade assembly consists of drilling blades and relieving teeth; the drilling blade is connected to the tail end of the blade shaft inner rod in a matching manner; the relieving teeth are uniformly distributed along the length direction of one side surface of the drilling blade; the head of the relieving is protruded to the outer side of the drilling blade.