CN214944001U - Drilling tool connecting sleeve and triple jet drilling tool - Google Patents

Abstract

The utility model discloses a drilling tool connecting sleeve and a triple jet drilling tool, wherein an air channel, a slurry channel and a water channel are axially arranged on the connecting sleeve, and the water channel is positioned in the center of the connecting sleeve and is communicated with a mounting hole; the air channel and the slurry channel are positioned outside the water channel. The utility model discloses set up the inner channel of inlayer as the water transmission channel of highest pressure, set up the intermediate channel as the mud transmission channel of pressure time, set up outermost outer channel as the gas transmission channel of minimum pressure, the pressure of each passageway reduces from inside to outside in proper order, the pressure that the last inner tube that the pipe diameter is minimum bore is born is the biggest, the corresponding can be set for littleer to go up inner tube wall thickness under the condition that satisfies the pressure-bearing condition, the purpose that the small pipe diameter reaches the superhigh pressure has been realized, the whole volume of drilling tool is littleer, light in weight, the dismouting degree of difficulty has been reduced, the dismouting cost has been reduced; and the pipe diameter and the wall thickness of each core pipe are smaller, so that the cost is lower, and the cost of the drilling tool is further reduced.

Description

Drilling tool connecting sleeve and triple jet drilling tool

Technical Field

The utility model belongs to the technical field of the drilling tool technique of rig and specifically relates to a drilling tool adapter sleeve and triple jet grouting drilling tool.

Background

The rotary spraying construction method is that a drilling machine is used for drilling, slurry is sprayed out from a high-pressure nozzle at a high speed through a high-pressure generating device to form a liquid flow with highly concentrated energy, and soil bodies are directly damaged. The high-pressure rotary jetting drilling tool commonly used in the prior art comprises a single drilling tool, a double drilling tool and a triple drilling tool. The single drilling tool is a single channel, and only one medium (such as mud) can be transmitted in one construction. The dual drilling tool has dual channels, and can simultaneously transmit two media (such as water and mud). For the rotary jetting construction with large pile-forming diameter and high pile-forming quality requirement, a triple drilling tool is usually adopted, the triple drilling tool is provided with a triple channel, three media (such as slurry, water and gas) can be simultaneously transmitted, ultrahigh pressure is provided by the confluence of the water and the gas for precutting to reach the designed aperture, and then the slurry is injected for filling.

The triple drilling tools respectively transmit mud, water and gas through three channels, and high-pressure water is used for cutting a soil layer, so that the pressure of water is highest and the pressure of mud is second, and gas is used for being converged with water and protecting the water, so that the pressure of gas is minimum. The existing triple drilling tools are generally coaxially provided with an inner channel, a middle channel and an outer channel, wherein the inner channel is a slurry channel, the middle channel is a water channel, and the outer channel is an air channel. Such an arrangement has the following disadvantages: the wall thickness t = (pressure P outer diameter R coefficient S)/(2 steel pipe material tensile strength sigma) of each core pipe of the drilling tool_b) Namely, the larger the pressure on the core pipe is, the larger the outer diameter is, the larger the wall thickness is; this arrangement will apply pressureThe largest water is transmitted through the middle channel, the innermost inner core tube and the middle core tube bear the pressure from the water, the wall thicknesses of the inner core tube and the middle core tube need to be set thicker correspondingly, namely the pipe diameters of the inner core tube and the middle core tube are larger, the outer diameter of the middle core tube is larger, the wall thickness and the pipe diameter need to be further increased, and the pipe diameter of the outer core tube can be correspondingly increased.

SUMMERY OF THE UTILITY MODEL

The applicant provides a drilling tool connecting sleeve and a triple jet drilling tool with reasonable structure aiming at the defects of the existing triple jet drilling tool, the inner channel of the innermost layer is set as a water channel, the middle channel is set as a slurry channel, the inner channel and the outer channel are converged through the connecting sleeve, the pressure of each channel in the drilling tool is reduced from inside to outside in sequence, the requirements on the wall thickness and the pipe diameter of each core pipe are reduced, the purpose of achieving ultrahigh pressure through small pipe diameter is achieved, the overall volume of the drilling tool is reduced, the weight is reduced, the drilling tool is convenient to disassemble and assemble, the disassembling cost is reduced, and the drilling tool cost is reduced.

The utility model discloses the technical scheme who adopts as follows:

a drilling tool connecting sleeve is characterized in that a mounting hole is radially formed in the circumferential wall surface of the connecting sleeve, an air channel, a slurry channel and a water channel are axially formed in the connecting sleeve, the air channel and the water channel are blind holes with open top surfaces and closed bottom surfaces, and the slurry channel is a through hole; the water channel is positioned in the center of the connecting sleeve and is communicated with the mounting hole; the air channel and the slurry channel are positioned outside the water channel; the air channel and the mounting hole are arranged at the same side and communicated with the mounting hole.

As a further improvement of the above technical solution:

the air channel and the slurry channel are arranged orthogonally outside the water channel.

The two opposite sides of the connecting sleeve are symmetrically provided with mounting holes and air channels, and the two opposite sides of the connecting sleeve in the orthogonal direction with the air channels are symmetrically provided with slurry channels.

The air channel and the slurry channel are arc long holes.

The mounting holes are stepped holes, and the aperture of each stepped hole is reduced from outside to inside in sequence; the air channel is communicated with the second-stage stepped hole of the mounting hole, and the water channel is communicated with the third-stage stepped hole of the mounting hole.

A triple jet drilling tool adopts the drilling tool connecting sleeve, and an upper drilling rod component, an upper nozzle component, a lower drilling rod component and a lower nozzle component are sequentially connected; the upper drill rod component is of a three-layer pipe structure, an outer pipe, an upper middle pipe and an upper inner pipe are sequentially arranged from outside to inside, an outer channel is arranged between the upper outer pipe and the upper middle pipe, a middle channel is arranged between the upper middle pipe and the upper inner pipe, and an inner channel is arranged in the center of the upper inner pipe; the upper nozzle component comprises a connecting sleeve, a water nozzle and an air nozzle; the water nozzle and the gas nozzle are inserted in the mounting hole of the connecting sleeve, the gas nozzle is sleeved on the periphery of the water nozzle, and the mounting hole respectively conducts the water channel and the water nozzle and the gas channel and the gas nozzle; the air channel of the connecting sleeve is communicated with the outer channel of the upper drill rod assembly, the slurry channel is communicated with the middle channel, and the water channel is communicated with the inner channel; the center of the lower drill rod component is provided with a through central channel which is communicated with the slurry channel of the connecting sleeve; the lower nozzle assembly includes a nozzle holder and a slurry nozzle in communication with the central passage of the lower drill stem assembly.

As a further improvement of the above technical solution:

the lower drill rod component is of an inner pipe and outer pipe double-layer structure, the lower inner pipe is inserted in a central through hole of the lower outer pipe, and the center of the lower inner pipe is a through central channel.

The upper end part of the upper drill rod component is connected with an upper joint component, and the upper joint component comprises an upper outer joint, a first upper inner joint and a second upper inner joint; the upper part of the upper outer joint is a connecting part; a first channel is arranged between the upper outer joint and the first upper inner joint and between the upper outer joint and the second upper inner joint, and the first channel is communicated with an outer channel of the upper drill rod assembly; the second upper inner joint is provided with a second channel and a third channel, the second channel is communicated with the middle channel of the upper drill rod component, and the third channel is communicated with the inner channel of the upper drill rod component.

The lower end part of the upper drill rod component is connected with the upper nozzle component through a lower joint component; the lower joint assembly comprises a lower outer joint, a first lower inner joint and a second lower inner joint, a fourth channel is arranged between the first lower inner joint and the lower outer joint, a fifth channel is arranged between the second lower inner joint and the first lower inner joint, and a through sixth channel is arranged in the center of the second lower inner joint; the fourth channel conducts an outer channel of the upper drill rod component and an air channel of the connecting sleeve, the fifth channel conducts a middle channel of the upper drill rod component and a slurry channel of the connecting sleeve, and the sixth channel conducts an inner channel of the upper drill rod component and a water channel of the connecting sleeve.

The inner end part of the water nozzle is inserted into the third-stage stepped hole of the mounting hole of the connecting sleeve, and the air nozzle is positioned in the second-stage stepped hole of the mounting hole.

The utility model has the advantages as follows:

the utility model discloses set up the inner channel of inlayer as the water transmission channel of highest pressure, set up the intermediate channel as the mud transmission channel of pressure time, set up outmost outer passageway as the gas transmission channel of minimum pressure, the pressure of each passageway reduces from inside to outside in proper order, the pressure that the last inner tube that the pipe diameter is minimum bore is the biggest, according to the relational expression of core tube wall thickness and pressure, external diameter, under the condition of same pressure, because the last inner tube pipe diameter that bears the highest pressure medium is littleer, then the corresponding interior pipe wall thickness of going up can be set for littleer under the condition that satisfies the pressure-bearing condition; moreover, because the pressure of each channel is reduced from inside to outside in sequence, and the pressure born by each core pipe from inside to outside is also reduced in sequence, the wall thickness of the upper inner pipe, the upper middle pipe and the upper outer pipe can be correspondingly reduced under the condition of meeting the pressure-bearing condition, namely the upper inner pipe, the upper middle pipe and the upper outer pipe can meet the high-pressure requirement of each medium under the condition of smaller pipe diameter and thinner wall thickness, namely the requirements on the wall thickness and the pipe diameter of each core pipe are reduced, the purpose that the small pipe diameter achieves ultrahigh pressure is realized, the whole volume of the drilling tool is smaller, the weight is lighter, the disassembly and assembly difficulty is reduced, and the disassembly and assembly cost is reduced; and the pipe diameter and the wall thickness of each core pipe are smaller, so that the cost is lower, and the cost of the drilling tool is further reduced.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a top view of the present invention.

Fig. 4 is a sectional view taken along line B-B of fig. 3.

Fig. 5 is an enlarged view of a portion C in fig. 4.

Fig. 6 is an enlarged view of a portion D in fig. 4.

Fig. 7 is a perspective view of the connection sleeve.

Fig. 8 is a left-right longitudinal sectional view of fig. 7.

Fig. 9 is a front-rear longitudinal sectional view of fig. 7.

Fig. 10 is a cross-sectional view of fig. 7.

In the figure: 100. an upper joint assembly; 1. an upper outer joint; 2. a first upper inner joint; 3. a second upper inner joint; 15. a first channel; 16. a second channel; 17. a third channel; 30. a connecting portion;

200. an upper drill rod assembly; 4. an upper outer tube; 5. mounting a middle pipe; 6. an upper inner tube; 18. an outer channel; 19. a middle channel; 20. an inner channel;

300. a lower adapter assembly; 7. a lower outer joint; 8. a first lower inner joint; 9. a second lower inner joint; 21. a fourth channel; 22. a fifth channel; 23. a sixth channel;

400. an upper nozzle assembly; 10. connecting sleeves; 11. a water nozzle; 12. an air nozzle; 24. an air channel; 25. a slurry channel; 26. a water passage; 31. mounting holes;

500. a lower drill rod assembly; 13. a lower outer tube; 14. a lower inner tube; 27. a central channel;

600. a lower nozzle assembly; 28. a nozzle holder; 29. a slurry nozzle.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 to 3, the present invention includes, from top to bottom, an upper joint assembly 100, an upper drill rod assembly 200, a lower joint assembly 300, an upper nozzle assembly 400, a lower drill rod assembly 500, and a lower nozzle assembly 600; the upper and lower joint assemblies 100 and 300 are coupled to upper and lower ends of the upper drill rod assembly 200, respectively, the lower joint assembly 300 is coupled to an upper end of the upper nozzle assembly 400, and the upper and lower nozzle assemblies 400 and 600 are coupled to upper and lower ends of the lower drill rod assembly 500, respectively.

As shown in fig. 2 to 4, the upper joint assembly 100 includes an upper outer joint 1, a first upper inner joint 2, and a second upper inner joint 3. The upper part of the upper outer joint 1 is provided with a connecting part 30 which is used for connecting with a slewing gear; the first upper inner joint 2 is inserted in the upper outer joint 1, a plurality of raised key teeth are arranged on the outer cylindrical surface of the first upper inner joint 2 along the circumferential direction, and a shunting hole is formed between every two adjacent key teeth and between the inner circumferential surfaces of the upper outer joint 1; the upper part of the second upper inner joint 3 is inserted into the first upper inner joint 2, a gap is arranged between the lower part of the second upper inner joint 3 and the inner circumferential surface of the upper outer joint 1, and the gap is communicated with a shunting hole between the upper outer joint 1 and the first upper inner joint 2 to form a through first channel 15; the second upper inner joint 3 is provided with a second channel 16 and a third channel 17 which are communicated along the axial direction, the third channel 17 is positioned at the center, and the plurality of second channels 16 are distributed at the outer side of the third channel 17 along the circumferential direction.

As shown in fig. 2 to 4, the upper drill rod assembly 200 is a coaxial three-layer tube structure, which comprises an upper outer tube 4, an upper middle tube 5 and an upper inner tube 6 from outside to inside; the annular gap between the inner circumferential surface of the upper outer tube 4 and the outer circumferential surface of the upper middle tube 5 forms an outer channel 18, the annular gap between the inner circumferential surface of the upper middle tube 5 and the outer circumferential surface of the upper inner tube 6 forms a middle channel 19, and the center of the upper inner tube 6 is provided with a through inner channel 20. As shown in fig. 4 and 5, the upper outer pipe 4 is fixed to the upper outer joint 1 by screw connection, the upper middle pipe 5 and the upper inner pipe 6 are inserted into the second upper inner joint 3, the first passage 15 is communicated with the outer passage 18, the second passage 16 is communicated with the middle passage 19, and the third passage 17 is communicated with the inner passage 20.

As shown in fig. 2 to 4, the lower joint assembly 300 includes a lower outer joint 7, a first lower inner joint 8, and a second lower inner joint 9. The first lower inner joint 8 is inserted in the lower outer joint 7, and a through fourth channel 21 is arranged between the first lower inner joint 8 and the lower outer joint 7; the second lower inner joint 9 is inserted in the first lower inner joint 8, and a through fifth channel 22 is arranged between the second lower inner joint 9 and the first lower inner joint 8; the second lower nipple 9 has a through sixth channel 23 in the centre. As shown in fig. 4 and 6, the lower outer joint 7 is fixedly connected to the lower end portion of the upper outer pipe 4 by screw threads, the first lower inner joint 8 is fitted to the lower end portion of the upper middle pipe 5, the second lower inner joint 9 is fitted to the lower end portion of the upper inner pipe 6, the fourth passage 21 communicates with the outer passage 18, the fifth passage 22 communicates with the intermediate passage 19, and the sixth passage 23 communicates with the inner passage 20.

As shown in fig. 2 to 4, the upper nozzle assembly 400 includes a connecting sleeve 10, a water nozzle 11, an air nozzle 12; as shown in fig. 7 to 10, the circumferential wall surfaces of the left and right sides of the connecting sleeve 10 opposite to each other are symmetrically provided with mounting holes 31 along the radial direction, the mounting holes 31 are stepped holes having three steps, and are a first-stage stepped hole, a second-stage stepped hole and a third-stage stepped hole in sequence from outside to inside, and the hole diameter of each stepped hole is reduced in sequence from outside to inside; as shown in fig. 2 and 4, the water nozzle 11 is inserted into the mounting hole 31, and the inner end of the water nozzle 11 is inserted into the third-stage stepped hole of the mounting hole 31; the air nozzle 12 is sleeved on the periphery of the water nozzle 11, and the air nozzle 12 is positioned in the second-stage stepped hole of the mounting hole 31 and communicated with the second-stage stepped hole. As shown in fig. 8, the air passages 24 are symmetrically formed on the upper portion, the opposite left and right sides of the connecting sleeve 10 along the axial direction, the air passages 24 are blind holes with open top surfaces and closed bottom surfaces, and are communicated with the second-stage stepped holes of the mounting holes 31, as shown in fig. 2 and 4, the second-stage stepped holes of the mounting holes 31 are communicated with the air passages 24 and the air nozzles 12. The center of the upper part of the connecting sleeve 10 is provided with a water passage 26 along the axial direction, the water passage 26 is a blind hole with an open top surface and a closed bottom surface, and is communicated with a third-stage stepped hole of the mounting hole 31, as shown in fig. 2 and 4, the third-stage stepped hole of the mounting hole 31 is communicated with the water passage 26 and the water nozzle 11. As shown in fig. 9, slurry channels 25 are symmetrically formed on the opposite front and rear sides of the connecting sleeve 10 along the axial direction, and the slurry channels 25 are through holes penetrating the axial direction. As shown in fig. 10, the air passage 24 and the slurry passage 25 are arc-shaped long holes, so as to obtain as large a flow area as possible in a limited area, ensure sufficient air flow and slurry flow, and ensure pile-forming quality. As shown in fig. 4 and 6, the connecting sleeve 10 is fixedly connected to the lower outer joint 7 by a screw thread, the lower ends of the first lower inner joint 8 and the second lower inner joint 9 are inserted into the upper portion of the connecting sleeve 10, the fourth passage 21 conducts the outer passage 18 and the air passage 24, the fifth passage 22 conducts the middle passage 19 and the slurry passage 25, and the sixth passage 23 conducts the inner passage 20 and the water passage 26. As shown in fig. 2, the water channel 26 of the connecting sleeve 10 is opened in the center, the air channel 24 with an incomplete annular cross section and the slurry channel 25 are orthogonally distributed on the outer side of the water channel 26, and while communication with the corresponding channels and medium transmission are realized, sufficient space is provided between the slurry channels 25 arranged on the two opposite sides for opening the mounting hole 31, and the water channel 26 and the air channel 24 (i.e. the inner channel 20 and the outer channel 18) are merged, so that the purpose that the innermost medium passes through in the radial direction and merges with the outermost medium is realized, and the transmission of the water with the highest pressure in the innermost inner channel 20 becomes a feasible scheme.

As shown in fig. 4, the lower drill rod assembly 500 has a double-layered structure of inner and outer pipes, and includes a lower outer pipe 13 and a lower inner pipe 14, which are coaxial, the lower inner pipe 14 is inserted into a central through hole of the lower outer pipe 13, and a central passage 27 is formed at the center of the lower inner pipe 14. As shown in fig. 4 and 6, the lower outer pipe 13 is fixed to the connecting sleeve 10 by screw coupling, the lower inner pipe 14 is inserted into the lower portion of the connecting sleeve 10, and the central passage 27 communicates with the slurry passage 25 of the connecting sleeve 10.

As shown in fig. 4, the lower nozzle assembly 600 includes a nozzle holder 28 and slurry nozzles 29, and the slurry nozzles 29 are radially symmetrically arranged on opposite left and right sides of the nozzle holder 28. The nozzle holder 28 is fixed to the lower end portion of the lower outer tube 13 by screw connection, the lower end portion of the lower inner tube 14 is inserted into the nozzle holder 28, and the central passage 27 communicates with the slurry nozzle 29.

In actual use, the upper joint component 100 is connected to the rotating device through the connecting part 30, and high-pressure water is input from the third channel 17, is transmitted to the water nozzle 11 through the inner channel 20 and the water channel 26, and is sprayed out of the water nozzle 11; high-pressure gas is input from the first channel 15, is transmitted to the gas nozzle 12 through the outer channel 18 and the gas channel 24, and is sprayed out from the gas nozzle 12; high-pressure water sprayed from the water nozzle 11 is converged with high-pressure air sprayed from the air nozzle 12 to provide an ultrahigh-pressure cutting soil layer, and a hole is formed to a designed hole diameter by rotary spraying; the high-pressure slurry is supplied from the second passage 16, is transferred to the slurry nozzle 29 through the intermediate passage 19, the slurry passage 25 and the central passage 27, and is ejected from the slurry nozzle 29 to fill the formed hole.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention.

Claims (10)

1. A drilling tool connecting sleeve is characterized in that: the circumferential wall surface of the connecting sleeve (10) is radially provided with a mounting hole (31), the connecting sleeve (10) is axially provided with an air channel (24), a slurry channel (25) and a water channel (26), the air channel (24) and the water channel (26) are blind holes with open top surfaces and closed bottom surfaces, and the slurry channel (25) is a through hole;

the water channel (26) is positioned in the center of the connecting sleeve (10) and is communicated with the mounting hole (31);

the air channel (24) and the pulp channel (25) are positioned outside the water channel (26);

the air channel (24) and the mounting hole (31) are arranged at the same side and are communicated with the mounting hole (31).

2. A drill connecting sleeve according to claim 1, characterized in that: the air passage (24) is arranged orthogonally to the slurry passage (25) outside the water passage (26).

3. A drill connecting sleeve according to claim 1, characterized in that: the opposite two sides of the connecting sleeve (10) are symmetrically provided with mounting holes (31) and air channels (24), and the opposite two sides of the connecting sleeve (10) in the direction orthogonal to the air channels (24) are symmetrically provided with slurry channels (25).

4. A drill connecting sleeve according to claim 1, characterized in that: the air channel (24) and the pulp channel (25) are arc-shaped long holes.

5. A drill connecting sleeve according to claim 1, characterized in that: the mounting holes (31) are stepped holes, and the aperture of each stepped hole is reduced from outside to inside in sequence; the air channel (24) is communicated with the second-stage stepped hole of the mounting hole (31), and the water channel (26) is communicated with the third-stage stepped hole of the mounting hole (31).

6. A triple jet drilling tool is characterized in that: the connecting sleeve of the drilling tool according to any one of claims 1 to 5, wherein an upper drill rod component (200), an upper nozzle component (400), a lower drill rod component (500) and a lower nozzle component (600) are connected in sequence;

the upper drill rod assembly (200) is of a three-layer pipe structure, an outer pipe (4), an upper middle pipe (5) and an upper inner pipe (6) are sequentially arranged from outside to inside, an outer channel (18) is arranged between the upper outer pipe (4) and the upper middle pipe (5), a middle channel (19) is arranged between the upper middle pipe (5) and the upper inner pipe (6), and an inner channel (20) is arranged in the center of the upper inner pipe (6);

the upper nozzle assembly (400) comprises a connecting sleeve (10), a water nozzle (11) and an air nozzle (12); the water nozzle (11) and the air nozzle (12) are inserted into a mounting hole (31) of the connecting sleeve (10), the air nozzle (12) is sleeved on the periphery of the water nozzle (11), and the mounting hole (31) is respectively communicated with the water passage (26) and the water nozzle (11) and the air passage (24) and the air nozzle (12); an air passage (24) of the connecting sleeve (10) is communicated with an outer passage (18) of the upper drill rod component (200), a slurry passage (25) is communicated with a middle passage (19), and a water passage (26) is communicated with an inner passage (20);

the center of the lower drill rod component (500) is provided with a through central passage (27), and the central passage (27) is communicated with a slurry passage (25) of the connecting sleeve (10);

the lower nozzle assembly (600) includes a nozzle holder (28) and a slurry nozzle (29), the slurry nozzle (29) communicating with the central passage (27) of the lower drill stem assembly (500).

7. The triple jet grouting drill according to claim 6, characterized in that: the lower drill rod component (500) is of an inner-outer pipe double-layer structure, a lower inner pipe (14) is inserted into a central through hole of a lower outer pipe (13), and the center of the lower inner pipe (14) is a through central channel (27).

8. The triple jet grouting drill according to claim 6, characterized in that: the upper end part of the upper drill rod component (200) is connected with an upper joint component (100), and the upper joint component (100) comprises an upper outer joint (1), a first upper inner joint (2) and a second upper inner joint (3); the upper part of the upper outer joint (1) is provided with a connecting part (30); a first channel (15) is arranged between the upper outer joint (1) and the first upper inner joint (2) and between the upper outer joint and the second upper inner joint (3), and the first channel (15) is communicated with an outer channel (18) of the upper drill rod component (200); the second upper inner joint (3) is provided with a second channel (16) and a third channel (17), the second channel (16) is communicated with a middle channel (19) of the upper drill rod component (200), and the third channel (17) is communicated with an inner channel (20) of the upper drill rod component (200).

9. The triple jet grouting drill according to claim 6, characterized in that: the lower end of the upper drill rod assembly (200) is connected with the upper nozzle assembly (400) through the lower joint assembly (300); the lower joint assembly (300) comprises a lower outer joint (7), a first lower inner joint (8) and a second lower inner joint (9), a fourth channel (21) is arranged between the first lower inner joint (8) and the lower outer joint (7), a fifth channel (22) is arranged between the second lower inner joint (9) and the first lower inner joint (8), and a through sixth channel (23) is arranged in the center of the second lower inner joint (9); the fourth channel (21) is communicated with an outer channel (18) of the upper drill rod assembly (200) and an air channel (24) of the connecting sleeve (10), the fifth channel (22) is communicated with a middle channel (19) of the upper drill rod assembly (200) and a slurry channel (25) of the connecting sleeve (10), and the sixth channel (23) is communicated with an inner channel (20) of the upper drill rod assembly (200) and a water channel (26) of the connecting sleeve (10).

10. The triple jet grouting drill according to claim 6, characterized in that: the inner end part of the water nozzle (11) is inserted into the third-stage stepped hole of the mounting hole (31) of the connecting sleeve (10), and the air nozzle (12) is positioned in the second-stage stepped hole of the mounting hole (31).

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