阅读说明：本技术 一种在岩石中旋扩成盘异型钻具 (Rotary expansion disc-forming special-shaped drilling tool in rock ) 是由 滕金领 于 2021-08-27 设计创作，主要内容包括：本发明提供了一种在岩石中旋扩成盘异型钻具,包括导向仓、收缩在所述导向仓内部的切削单元以及设置在所述切削单元底部的导向管；所述切削单元包括与所述导向仓内部转动连接的上盘切削翼以及与所述上盘切削翼另另一端转动配合的下盘切削翼,所述下盘切削翼下端与所述导向管转动配合。本发明能够解决在设计要求承载力高,深孔钻进困难的岩石地层中采用可缩短桩长、减少施工难度,并能避免在收合过程中支臂夹土不能完全闭合的现象。(The invention provides a rotary-expanding coiled special-shaped drilling tool in rock, which comprises a guide bin, a cutting unit contracted in the guide bin and a guide pipe arranged at the bottom of the cutting unit; the cutting unit comprises an upper disc cutting wing rotationally connected with the inside of the guide bin and a lower disc cutting wing rotationally matched with the other end of the upper disc cutting wing, and the lower end of the lower disc cutting wing is rotationally matched with the guide pipe. The invention can solve the problems that the pile length can be shortened, the construction difficulty is reduced and the phenomenon that the support arm cannot be completely closed by clamping soil in the folding process can be avoided when the design requires that the bearing capacity is high and deep hole drilling is difficult.)

1. A special-shaped drilling tool capable of realizing rotary expansion in rock into a disc is installed on a rotary drilling rig and is characterized by comprising a guide bin (1), a cutting unit (2) contracted in the guide bin (1) and a guide pipe (3) arranged at the bottom of the cutting unit (2);

the cutting unit (2) comprises an upper disc cutting wing (4) rotatably connected with the inner part of the guide bin (1) and a lower disc cutting wing (5) rotatably matched with the other end of the upper disc cutting wing (4), and the lower end of the lower disc cutting wing (5) is rotatably matched with the guide pipe (3).

2. The rotary expansion disc shaped drilling tool in rock according to claim 1, characterized in that the outer wall of the upper disc cutting wing (4) and the outer wall of the lower disc cutting wing (5) are provided with cutting picks (6).

3. Rotary expansion into a disc shaped drilling tool in rock according to claim 1, characterized in that the top of the guiding cabin (1) is provided with a connecting sleeve (7).

4. The rotary expansion disc-forming drilling tool in rock according to claim 1, characterized in that the number of the cutting units (2) is one or more, and when the cutting units (2) are provided in plurality, the cutting units (2) are arranged uniformly along the circumference of the guide bin (1).

5. The rotary expansion disc-forming special-shaped drilling tool in the rock according to claim 4, characterized in that the outer side wall of the guide bin (1) is provided with opening and closing gaps along the axial direction of the guide bin (1), and the number of the opening and closing gaps is the same as that of the cutting units (2).

6. The rotary expansion special-shaped drilling tool for drilling disks in rocks according to claim 1, wherein the cutting unit (2) is connected with the guide pipe (3) through a connecting rod (8), one end of the connecting rod (8) is fixedly connected with the top of the guide pipe (3), the other end of the connecting rod (8) extends into the guide bin (1) and is in sliding fit with the interior of the guide bin (1), and the lower end of the lower disk cutting wing (5) of the cutting unit (2) is rotatably connected with the lower part of the connecting rod (8).

7. The rotary expansion disc-forming special-shaped drilling tool in the rock according to claim 1, characterized in that a bearing (9) is fixedly connected to the bottom of the guide tube (3), and an antenna (10) is fixedly connected to the outer wall of a shaft sleeve of the bearing (9).

8. The rotary expansion disc shaped drilling tool in rock according to claim 7, characterized in that the number of the antenna (10) is at least four, and the antennas (10) are evenly arranged along the circumference of the bearing (9).

9. The rotary expansion disc shaped drilling tool in rock according to claim 7, characterized in that the feeler (10) is fixedly connected with the sleeve by a reinforcing plate (11).

10. Rotary expansion into disc profiled drilling tool in rock according to claim 8, characterized in that the top of the bearing (9) is fixedly connected with the guiding tube (3) by a connecting block (12), the connecting block (12) extending inside the guiding tube (3).

Technical Field

The invention belongs to the technical field of drilling tool structures, and particularly relates to a spiral expanding disc-shaped drilling tool in rock.

Background

Drilling tools in the field of piling are the most critical parts, nearly one hundred drilling tool structure technical fields exist in the prior art according to drilling tool classification, most of the drilling tools mainly drill various soil layers, and the drilling tools for drilling rock and stone only account for about 20 percent.

The conventional drilling tool has high working difficulty when high bearing capacity is required and hard rock and deep hole inner reaming is required in the working process, and the reaming is difficult to complete quickly, so that the construction period is delayed, and therefore, the special-shaped drilling tool which can be expanded into a disc in rock in the hard rock reaming process is designed, is environment-friendly and efficient, and can fully play the role of the drilling tool in the hard rock reaming.

Disclosure of Invention

The invention provides a novel special drilling tool capable of performing rotary expansion in rock to form a disc, and aims to solve the technical problems of low hole expansion efficiency and difficulty in drilling of the conventional drilling tool.

In view of the above, the invention provides a novel special drilling tool for rotary expansion into a disc in rock, which is mounted on a rotary drilling rig and comprises a guide bin, a cutting unit contracted in the guide bin and a guide pipe arranged at the bottom of the cutting unit;

the cutting unit comprises an upper disc cutting wing rotationally connected with the inside of the guide bin and a lower disc cutting wing rotationally matched with the other end of the upper disc cutting wing, and the lower end of the lower disc cutting wing is rotationally matched with the guide pipe.

In the above technical solution, optionally, the outer walls of the upper disc cutting wing and the lower disc cutting wing are both provided with picks.

In the above technical solution, optionally, a connecting sleeve is arranged at the top of the guide bin.

In the above technical solution, optionally, the number of the cutting units is one or more, and when the cutting units are provided with a plurality of cutting units, the cutting units are uniformly arranged along the circumferential direction of the guide bin.

In the above technical solution, optionally, the outer side wall of the guide bin is provided with opening and closing gaps along the axial direction of the guide bin, and the number of the opening and closing gaps is the same as the number of the cutting units.

In the above technical solution, optionally, the cutting unit is connected with the guide pipe through a connecting rod, one end of the connecting rod is fixedly connected with the top of the guide pipe, the other end of the connecting rod extends into the guide bin and is in sliding fit with the guide bin, and the lower end of the lower cutting wing of the cutting unit is rotatably connected with the lower portion of the connecting rod.

In the above technical solution, optionally, the bottom of the guide tube is fixedly connected with a bearing, and an outer wall of a shaft sleeve of the bearing is fixedly connected with an antenna.

In the above technical solution, optionally, the number of the antennae is at least four, and the antennae are uniformly arranged along the circumferential direction of the bearing.

In the above technical solution, optionally, the antenna and the shaft sleeve are fixedly connected through a reinforcing plate.

In the above technical solution, optionally, the top of the bearing is fixedly connected to the guide tube through a connection block, and the connection block extends into the guide tube.

Compared with the prior art, the invention has the advantages that:

1. the invention is specially matched with a rotary drilling rig, can solve the problems that the design requires high bearing capacity and deep hole drilling is difficult, can shorten the pile length, reduce the construction difficulty, can avoid the phenomenon that the support arm cannot be completely closed by clamping soil in the folding process, can simplify the step of forming a rotary expansion disc, and avoids the phenomenon that the drilling tool cannot be lifted up because rock slag chips are full of a rotary expansion part wing plate.

2. When hole expansion is carried out, hole expansion is carried out through the upper disc cutting wings and the lower disc cutting wings which are mutually and rotatably matched, when the hole is entered, the upper disc cutting wings and the lower disc cutting wings are contracted in the guide bin, and the upper disc cutting wings and the lower disc cutting wings are expanded after the hole is entered, and meanwhile, when the hole expansion action is completed, the upper disc cutting wings and the lower disc cutting wings can be also contracted into the guide bin to be conveniently taken out;

the length of the guide pipe is changed according to different hole depths and the entering depth of the rock, and after the guide pipe is prolonged, the cutting unit can be sent into the bottom of the hole, so that reaming is facilitated.

3. When the upper cutting wing and the lower cutting wing are opened and rotate, the cutting teeth are used for cutting the rock, and hole expansion is carried out, so that the rock is conveniently cut.

4. The connecting sleeve is arranged and connected with the output end of the rotary drilling rig through the connecting sleeve, the output end of the rotary drilling rig can be directly inserted into the connecting sleeve, the splicing and matching are more convenient, the expanded upper disc cutting wings and the expanded lower disc cutting wings can move in the hole conveniently, and the upper disc cutting wings and the lower disc cutting wings can expand the hole in the hole conveniently.

5. The cutting unit can be contracted into the guide bin, the guide bin provides a storage space for the cutting unit, and after hole expansion is completed, the upper disc cutting wing and the lower disc cutting wing can be contracted into the guide bin, so that the drilling tool can conveniently enter a part deep in a hole.

6. The connecting rod is arranged and is in sliding fit with the guide bin, and the cutting unit is a main stress unit in reaming work, so that the strength of the cutting unit is enhanced by the connecting rod.

7. The plurality of antennae are arranged and used for supporting external loads at the hole inner reaming positions, the connection strength between the antennae and the bearing is enhanced by the reinforcing plate, and the antennae are not easy to break.

8. Through setting up the connecting block, insert the connecting block in the stand pipe, can make bearing and stand pipe connection more stable.

Drawings

FIG. 1 shows a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the cutting unit of the present invention in its operating state;

fig. 3 shows a schematic plan view of the present invention in operation in a hole.

In the figure: 1. a guide bin; 2. a cutting unit; 3. a guide tube; 4. an upper disc cutting wing; 5. a lower disc cutting wing; 6. a cutting pick; 7. connecting sleeves; 8. a connecting rod; 9. a bearing; 10. an antenna; 11. a reinforcing plate; 12. connecting blocks; 13. carrying out rotary reaming; 14. and (5) rotatably expanding the height.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

The following description refers to fig. 1 to 3.

Example I:

the technical scheme of the embodiment is as follows:

a rotary-expanding disc-forming special-shaped drilling tool in rock is installed on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting unit 2 comprises an upper disc cutting wing 4 rotatably connected with the inner part of the guide bin 1 and a lower disc cutting wing 5 rotatably matched with the other end of the upper disc cutting wing 4, and the lower end of the lower disc cutting wing 5 is rotatably matched with the guide pipe 3.

Furthermore, the cutting picks 6 are arranged on the outer walls of the upper disc cutting wing 4 and the lower disc cutting wing 5, and the connecting sleeve 7 is arranged at the top of the guide bin 1.

The working process is as follows: measuring the depth of a hole to be reamed in advance, namely the height from the position to be reamed to the hole bottom in the hole, and setting the length of the guide tube 3 to be 20CM according with the depth of the hole to be reamed, for example, the height from the position to be reamed to the hole bottom in the hole to be reamed is 20CM, setting the length of the guide tube 3 to be 20CM, connecting the connecting sleeve 7 with the rotary drilling rig, namely inserting the output end of the rotary drilling rig into the middle of the connecting sleeve 7, or increasing the friction force between the output end of the rotary drilling rig and the connecting sleeve 7 by using other objects (such as wedges), extending the cutting unit 2 into the hole, firstly, driving the connecting sleeve 7 to rotate by the rotary drilling rig, enabling the cutting unit 2 and the guide bin 1 to rotate along with the connecting sleeve 7 and be jacked to the hole wall by the guide tube 3, so that the upper disc cutting wings 4 and the lower disc cutting wings 5 of the cutting unit 2 are extruded after the connecting sleeve 7 is pressurized, and due to the mutual rotating connection between the upper disc cutting wings 4 and the lower disc cutting wings 5, therefore, the upper disc cutting wings 4 and the lower disc cutting wings 5 are opened, the hole walls are cut by the upper disc cutting wings 4 and the lower disc cutting wings 5, the cut hole diameters of the upper disc cutting wings 4 and the lower disc cutting wings 5 are gradually increased, in this way, the upper disc cutting wings 4 and the lower disc cutting wings 5 are also opened to the maximum extent for cutting, after the cutting unit 2 is cut for a period of time, the connecting sleeve 7 and the guide bin 1 are pulled back by the rotary drilling rig, namely the lower disc cutting wings 5 are pulled back, the upper ends of the lower disc cutting wings 5 are contracted, and meanwhile, the lower ends of the upper disc cutting wings 4 are contracted, in this way, the upper disc cutting wings 4 and the lower disc cutting wings 5 are contracted into the guide bin 1, and then the cutting unit 2 is slowly pulled out of the hole.

Optionally, the lower disk cutting wings 5 are flanged with the guide tube 3.

Example II:

the technical scheme of the embodiment is as follows:

a rotary-expanding disc-forming special-shaped drilling tool in rock is installed on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting units 2 comprise upper disc cutting wings 4 rotatably connected with the inner part of the guide bin 1 and lower disc cutting wings 5 rotatably matched with the other ends of the upper disc cutting wings 4, the lower ends of the lower disc cutting wings 5 are rotatably matched with the guide pipe 3, the number of the cutting units 2 is one or more, and when the cutting units 2 are provided with a plurality of cutting units, the cutting units 2 are uniformly arranged along the circumferential direction of the guide bin 1.

Furthermore, the outer side wall of the guide bin 1 is provided with opening and closing gaps along the axial direction of the guide bin 1, and the number of the opening and closing gaps is the same as that of the cutting units 2.

Set up a plurality of cutting unit 2, can improve cutting efficiency to the cooperation sets up the gap that opens and shuts of the same quantity, and like this, cutting unit 2 will enter into guide bin 1 through the gap that opens and shuts, and guide bin 1's outer wall can block most rocks and enter into guide bin 1, is convenient for go up dish cutting wing 4 and lower dish cutting wing 5 and enters into in the guide bin 1.

Example III:

the technical scheme of the embodiment is as follows:

a rotary-expanding disc-forming special-shaped drilling tool in rock is installed on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting unit 2 comprises an upper disc cutting wing 4 rotatably connected with the inner part of the guide bin 1 and a lower disc cutting wing 5 rotatably matched with the other end of the upper disc cutting wing 4, and the lower end of the lower disc cutting wing 5 is rotatably matched with the guide pipe 3;

cutting unit 2 with stand pipe 3 passes through connecting rod 8 and connects, 8 one end of connecting rod with 3 top fixed connection of stand pipe, 8 other ends of connecting rod extend to inside the direction storehouse 1, and with the inside sliding fit of direction storehouse 1, cutting unit 2 lower extreme of lower wall cutting wing 5 with 8 lower parts of connecting rod rotate to be connected.

The cutting unit 2 is connected with the guide pipe 3 through the connecting rod 8, when the upper disc cutting wing 4 and the lower disc cutting wing 5 of the cutting unit 2 are opened, the guide pipe 3 moves relative to the guide bin 1, the upper end of the connecting rod 8 slides upwards in the guide bin 1, meanwhile, the upper end of the upper disc cutting wing 4 rotates in the guide bin 1, the lower end of the upper disc cutting wing 4 and the upper end of the lower disc cutting wing 5 rotate mutually, the lower end of the lower disc cutting wing 5 rotates at the lower end of the connecting rod 8, finally, the upper disc cutting wing 4 and the lower disc cutting wing 5 are opened, and when the upper disc cutting wing 4 and the lower disc cutting wing 5 are closed, the processes are opposite.

Example IV:

the technical scheme of the embodiment is as follows:

a rotary-expanding disc-forming special-shaped drilling tool in rock is installed on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting unit 2 comprises an upper disc cutting wing 4 rotatably connected with the inner part of the guide bin 1 and a lower disc cutting wing 5 rotatably matched with the other end of the upper disc cutting wing 4, and the lower end of the lower disc cutting wing 5 is rotatably matched with the guide pipe 3;

the bottom of the guide tube 3 is fixedly connected with a bearing 9, and the outer wall of a shaft sleeve of the bearing 9 is fixedly connected with an antenna 10.

Further, the number of the antenna 10 is at least four, and the antennas 10 are uniformly arranged along the circumferential direction of the bearing 9.

The antenna 10 is used for supporting at the hole bottom, and set up a plurality of antennas 10, be used for supporting, the support nature is more stable, after the antenna 10 supports at the hole bottom, when cutting unit 2 is rotatory underreamed, the antenna 10 is because the top is at the hole bottom, so the antenna 10 is motionless, it is rotatory by bearing 9 between cutting unit 2 and the antenna 10, so can more make things convenient for cutting unit 2 to rotate in the hole, if do not have the existence of antenna 10, directly push up at the hole bottom by stand pipe 3, then the frictional force of stand pipe 3 and hole bottom is very big, like this, cutting unit 2 just is difficult to rotate.

The length of the guide tube 3 is changed, so that the distance from the guide tube 3 to the antenna 10 is matched with the height from the rotary expansion position to the bottom of the hole.

Optionally, the antenna 10 is fixedly connected with the shaft sleeve through a reinforcing plate 11.

When the cutting unit 2 is rotated to enlarge the hole, the antenna 10 is also stressed except that the cutting unit 2 is a stressed unit, so that a reinforcing plate 11 is fixed between the antenna 10 and the shaft sleeve and used for reinforcing the connection strength of the antenna 10.

Example V:

the technical scheme of the embodiment is as follows:

a rotary-expanding disc-forming special-shaped drilling tool in rock is installed on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting unit 2 comprises an upper disc cutting wing 4 rotatably connected with the inner part of the guide bin 1 and a lower disc cutting wing 5 rotatably matched with the other end of the upper disc cutting wing 4, and the lower end of the lower disc cutting wing 5 is rotatably matched with the guide pipe 3;

the top of the bearing 9 is fixedly connected with the guide tube 3 through a connecting block 12, and the connecting block 12 extends to the inside of the guide tube 3.

Through connecting block 12 with stand pipe 3 and bearing 9 fixed connection to insert connecting block 12 and connect in stand pipe 3, intensity between reinforcing bearing 9 that can be fine and stand pipe 3.

Example VI:

the technical scheme of the embodiment is as follows:

a construction method for a rotary-expanding disc-forming special-shaped drilling tool in rock is arranged on a rotary drilling rig and comprises a guide bin 1, a cutting unit 2 contracted in the guide bin 1 and a guide pipe 3 arranged at the bottom of the cutting unit 2;

the cutting unit 2 comprises an upper disc cutting wing 4 rotatably connected with the inner part of the guide bin 1 and a lower disc cutting wing 5 rotatably matched with the other end of the upper disc cutting wing 4, and the lower end of the lower disc cutting wing 5 is rotatably matched with the guide pipe 3;

the outer walls of the upper disc cutting wing 4 and the lower disc cutting wing 5 are provided with cutting picks 6;

the top of the guide bin 1 is provided with a connecting sleeve 7;

the number of the cutting units 2 is one or more, and when a plurality of cutting units 2 are arranged, the cutting units 2 are uniformly arranged along the circumferential direction of the guide bin 1;

the outer side wall of the guide bin 1 is provided with opening and closing gaps along the axial direction of the guide bin 1, and the number of the opening and closing gaps is the same as that of the cutting units 2;

the cutting unit 2 is connected with the guide pipe 3 through a connecting rod 8, one end of the connecting rod 8 is fixedly connected with the top of the guide pipe 3, the other end of the connecting rod 8 extends into the guide bin 1 and is in sliding fit with the interior of the guide bin 1, and the lower end of the lower disc cutting wing 5 of the cutting unit 2 is rotatably connected with the lower part of the connecting rod 8;

the bottom of the guide tube 3 is fixedly connected with a bearing 9, and the outer wall of a shaft sleeve of the bearing 9 is fixedly connected with an antenna 10;

the number of the antennae 10 is at least four, and the antennae 10 are uniformly arranged along the circumferential direction of the bearing 9;

the antenna 10 is fixedly connected with the shaft sleeve through a reinforcing plate 11;

the top of the bearing 9 is fixedly connected with the guide tube 3 through a connecting block 12, and the connecting block 12 extends to the inside of the guide tube 3.

The method comprises the following steps: after the drill hole is formed, the length of the guide pipe 3 is set, and the connecting sleeve 7 is connected with the rotary drilling rig.

Step two: and (3) sending the cutting unit 2 to a disc expanding position in a hole, measuring the plane position of the rock, starting a down-pressure drilling tool, observing the unfolding states of the upper disc cutting wing 4 and the lower disc cutting wing 5 every 10 minutes of drilling, and after the upper disc cutting wing 4 and the lower disc cutting wing 5 are unfolded to one third of the designed width, lifting the upper disc cutting wing 4 and the lower disc cutting wing 5 out.

Step three: the drill bit is replaced, the hole is cleaned by the conventional drill bit, the cutting unit 2 is put into the hole, and the reaming process is repeated.

The following are specifically mentioned: and (4) reaming in the rock, wherein the conventional drill bit is used for cleaning the hole after the reaming of the cutting unit 2 is carried out each time, and then the whole hole forming process can be completed.

Finally, it should be noted that the above-mentioned embodiments should not be construed as limiting the scope of the invention, which is defined in the claims, and the description may be used for interpreting the claims.