CN113216846A - High-pressure jet drilling tool - Google Patents

Abstract

The invention discloses a high-pressure jet drilling tool, which comprises a water spraying assembly, a slurry returning assembly, a monitoring assembly, an upper slurry spraying assembly, a lower slurry spraying assembly and a drill bit assembly which are sequentially connected from top to bottom; the two opposite sides of the water nozzle seat of the water spray component are respectively inserted with a water nozzle; the first nozzle assembly of the upper guniting assembly and the second nozzle assembly of the lower guniting assembly are distributed on two opposite sides. The reaction forces of the two water nozzles and the two nozzle assemblies on the drilling tool are opposite in direction and offset, so that the influence of the reaction forces on the drilling tool is avoided, the drilling tool is prevented from being inclined, and the straightness of a pile hole is ensured.

Description

High-pressure jet drilling tool

Technical Field

The invention relates to the technical field of drilling tools of drilling machines, in particular to a high-pressure jet drilling tool.

Background

The MJS (Metro Jet System) construction method is also called an omnibearing high-pressure injection construction method, which is based on the traditional high-pressure injection grouting process, adopts a unique multi-channel drilling tool and a front-end forced mud suction device to realize the forced mud discharge in a hole and the monitoring of the underground pressure, controls the underground pressure by adjusting the forced mud discharge amount, reduces the possibility of ground surface deformation, reduces the influence of construction on the surrounding environment and ensures the diameter of a pile.

In the prior art, a high-pressure jet drilling tool applied to an MJS construction method is generally only provided with a single nozzle for jetting high-pressure slurry, the nozzle is inserted in a radial pore passage of a nozzle seat, and the radial pore passage is communicated with an axial slurry channel; the high-pressure jet drilling tool has the following disadvantages: (1) when the nozzle sprays high-pressure slurry, the nozzle can generate a reaction force to the drilling tool in one direction, the drilling tool is easy to incline under the influence of the one-way reaction force, particularly, the drilling tool is influenced by the one-way reaction force to be increased along with the continuous deepening of the construction depth, the inclination of the drilling tool is increased continuously, the straightness of a formed pile is influenced, and the pile forming quality is reduced; (2) the slurry channel in the drilling tool is orthogonally arranged with the radial pore passage in the nozzle seat, and high-pressure slurry is conveyed to the radial pore passage of the nozzle seat from the slurry channel, turns in the radial pore passage, turns from the vertical direction to the horizontal direction and is sprayed out from the nozzle; the slurry pressure of the high-pressure slurry is usually over 40MPa, so that the high-pressure slurry has large impact on the nozzle seat when turning, the nozzle seat is easy to wear, the practical service life of the nozzle seat is short, the whole nozzle seat needs to be replaced after being damaged, and the replacement cost of parts is high; (3) the matching parts of connecting parts of the existing high-pressure jet drilling tool are generally sealed by adopting U-shaped seals, the seals are not tight enough, leakage is easy to occur, and the sealing reliability is low.

Disclosure of Invention

The applicant provides a high-pressure jet drilling tool with a reasonable structure aiming at the defects of the existing high-pressure jet drilling tool, which is provided with double nozzles arranged oppositely, the two-way reaction forces of the double nozzles are mutually counteracted, the drilling tool is prevented from inclining, and the straightness of a formed pile is ensured; wear-resistant parts are inserted in the nozzle seat, so that high-pressure slurry is prevented from directly impacting the nozzle seat, and the replacement cost of parts is reduced; the sleeve is inserted at the butt joint part of the adjacent parts, and the O-shaped sealing ring is arranged on the periphery of the sleeve for sealing, so that the sealing reliability is high.

The technical scheme adopted by the invention is as follows:

a high-pressure jet drilling tool comprises a water spraying assembly, a slurry returning assembly, a monitoring assembly, an upper slurry spraying assembly, a lower slurry spraying assembly and a drill bit assembly which are sequentially connected from top to bottom, wherein a first slurry feeding channel, a second slurry feeding channel, a slurry returning channel, a water feeding channel, a gas feeding channel, a reverse water sucking channel, a reverse gas sucking channel and a signal line channel are axially arranged in the drilling tool;

the two opposite sides of the water nozzle seat of the water spray component are respectively inserted with a water nozzle which is communicated with the water delivery channel through a radial pore channel;

a pulp returning port communicated with the pulp returning channel is formed in the pulp returning seat body of the pulp returning assembly;

a first mounting hole is radially formed in a first slurry nozzle seat of the upper slurry spraying assembly, a first nozzle assembly is inserted into the first mounting hole, and the first nozzle assembly is communicated with a first slurry feeding channel and a gas feeding channel through a pore channel respectively;

and a second mounting hole is radially formed in a second slurry nozzle seat of the lower slurry spraying assembly, a second nozzle assembly is inserted into the second mounting hole, the second nozzle assembly and the first nozzle assembly are distributed on two opposite sides, and the second nozzle assembly is communicated with a second slurry feeding channel and a gas feeding channel through a pore channel respectively.

As a further improvement of the above technical solution:

a first wear-resistant part is inserted into a first mounting hole of the first slurry nozzle seat, a first slurry feeding hole channel which is communicated with the first slurry feeding hole channel is formed in the first wear-resistant part, and the first slurry feeding hole channel is communicated with the first slurry feeding channel and the first nozzle assembly.

And a second wear-resistant part is inserted into a second mounting hole of the second nozzle assembly, a through second slurry feeding hole channel is formed in the second wear-resistant part, and the second slurry feeding hole channel is communicated with the second slurry feeding channel and the second nozzle assembly.

The sleeve is respectively inserted in the butt joint part of two adjacent components of each channel, and a plurality of sealing rings are arranged between the outer peripheral surface of the sleeve and the inner peripheral surface of the corresponding butt joint component.

At least two sealing rings are arranged between the sleeve and the corresponding connecting part; the sealing ring is embedded in a groove of the outer cylindrical surface of the sleeve.

The bottom of the slurry return channel extends into the slurry return assembly, the bottom of the first slurry feeding channel extends into the upper slurry spraying assembly, the bottoms of the second slurry feeding channel, the water feeding channel and the air feeding channel extend into the lower slurry spraying assembly, and the bottoms of the inverted water suction channel, the inverted air suction channel and the signal line channel extend into the slurry return assembly.

The reverse water suction valve component is arranged on the pulp return base body and at the bottom of the pulp return channel and is communicated with the reverse water suction channel through a reverse water suction hole channel.

The bottom of the slurry return seat body is provided with a blind hole which is communicated with the signal line channel through a corresponding pore channel; the top of the first slurry nozzle seat is also provided with a blind hole, and the bottom of the blind hole is inserted with a pressure sensor; a through placing cavity is formed in the monitoring seat body of the monitoring assembly, the placing cavity is communicated with the blind hole in the bottom of the slurry return seat body and the blind hole in the top of the first slurry nozzle seat, and an inclination angle sensor is arranged in the placing cavity; and signal wires of the inclination angle sensor and the pressure sensor are led out from the signal wire channel.

The upper end and the lower end of the water spray assembly are respectively connected with a first connecting piece and a second connecting piece; the wall surface of the first connecting piece is provided with a plurality of inclined inverted air suction channels which are communicated with the pulp return channel and the inverted air suction channel.

One part of the inverted air suction hole channel is inclined upwards, and the other part of the inverted air suction hole channel is inclined downwards.

The invention has the following beneficial effects:

(1) the two water nozzles are spaced by 180 degrees and symmetrically distributed on two opposite sides of the water nozzle seat, when high-pressure water is sprayed to pre-cut the pile hole, the reaction forces of the two water nozzles acting on the drilling tool are opposite in direction and mutually offset, so that the influence of the reaction force on the drilling tool is avoided, the drilling tool is prevented from being inclined, and the straightness of the pile hole is ensured. The second nozzle assembly is 180 degrees away from the first nozzle assembly and distributed on two opposite sides, and when high-pressure slurry is sprayed, the reaction forces acting on the drilling tool are opposite in direction and offset, so that the influence of the reaction forces on the drilling tool is avoided, the drilling tool is prevented from being inclined, the straightness of a pile is ensured, and the pile forming quality is ensured.

(2) According to the invention, the first nozzle assembly and the second slurry nozzle seat respectively transmit high-pressure slurry through the slurry feeding hole channels of the wear-resistant part, and the wear-resistant part bears the impact of the high-pressure slurry, so that the slurry nozzle seat is prevented from being damaged by the direct impact of the high-pressure slurry on the slurry nozzle seat; compared with a slurry nozzle seat, the wear-resistant part has better impact resistance, has longer effective working time under the same impact force, prolongs the replacement period of parts and further prolongs the service life of a drilling tool; and the manufacturing cost of the wear-resistant part is cheaper, the processing difficulty is lower, the dismounting difficulty is lower, and the replacement cost is lower.

(3) According to the invention, each channel is sealed by adopting the O-shaped sealing ring at the butt joint part of two adjacent components, the O-shaped sealing ring is sealed by a cylindrical surface, the sealing is tight, the leakage is not easy to occur, and the sealing reliability is high; the O-shaped sealing ring is embedded in the groove of the outer cylindrical surface of the sleeve, the precision requirement on the matching surface of the sleeve and the connecting part is low, and the processing technology difficulty is low. Have double sealed guarantee at least between sleeve and the connecting portion spare that meets, further strengthened sealed strict density, the sealing reliability is higher.

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 sectional view taken along line B-B of fig. 1.

Fig. 4 is a top view of the present invention.

Fig. 5 is a sectional view of the C-C of fig. 4.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 4.

Fig. 7 is a cross-sectional view taken along line E-E of fig. 4.

Fig. 8 is a sectional view of fig. 4 taken along section F-F.

Fig. 9 is a sectional view taken along line G-G of fig. 4.

Fig. 10 is a sectional view taken along line H-H of fig. 4.

In the figure: 1. a first connecting member; 2. a water spray assembly; 21. a water nozzle holder; 22. a water nozzle; 23. a radial bore; 3. a second connecting member; 4. a pulp returning component; 41. a pulp returning base body; 42. a pulp return port; 43. a suck-back valve assembly; 44. a water reverse absorption pore channel; 5. a monitoring component; 51. monitoring the seat body; 52. a placement chamber; 53. a tilt sensor; 54. a pressure sensor; 6. an upper guniting assembly; 61. a first slurry nozzle holder; 62. a first nozzle assembly; 63. a first wear part; 64. a first slurry feeding duct; 65. a first mounting hole; 7. a lower guniting assembly; 71. a second slurry nozzle holder; 72. a second nozzle assembly; 73. a second wear part; 74. a second slurry feeding duct; 75. a second mounting hole; 8. a drill bit assembly; 9. a sleeve; 11. a seal ring; 12. a reverse air suction duct;

10. a first slurry feeding channel; 20. a second slurry feeding channel; 30. a pulp return channel; 40. a water delivery channel; 50. an air supply channel; 60. a reverse water suction channel; 70. a back suction channel; 80. a signal line channel.

Detailed Description

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

As shown in fig. 1 to 10, the present invention includes a first connecting member 1, a water spraying assembly 2, a second connecting member 3, a slurry returning assembly 4, a monitoring assembly 5, an upper slurry spraying assembly 6, a lower slurry spraying assembly 7 and a drill bit assembly 8 which are connected in sequence from top to bottom; all the parts are connected in sequence to form a jet drilling tool, and a first slurry feeding channel 10, a second slurry feeding channel 20, a slurry returning channel 30, a water feeding channel 40, a gas feeding channel 50, a reverse water sucking channel 60, a reverse gas sucking channel 70 and a signal wire channel 80 which are open at the tops are arranged in the jet drilling tool along the axial direction; the slurry return channel 30 is arranged in the center of the drilling tool, and the first slurry feeding channel 10, the second slurry feeding channel 20, the water feeding channel 40, the air feeding channel 50, the reverse water sucking channel 60, the reverse air sucking channel 70 and the signal wire channel 80 are positioned outside the slurry return channel 30. The bottom of the pulp return channel 30 extends to the middle part of the pulp return component 4; the bottom of the first slurry feeding channel 10 extends to the upper slurry spraying assembly 6; the second slurry feeding channel 20 is positioned at the other side opposite to the first slurry feeding channel 10, and the bottom of the second slurry feeding channel extends to the lower slurry spraying component 7; the bottom of the water feeding channel 40 extends to the middle part of the lower guniting component 7; the bottom of the air feed channel 50 extends to the upper part of the lower guniting assembly 7; the bottom of the inverted water absorption channel 60 extends to the middle part of the pulp returning component 4; the bottom of the back suction channel 70 extends to the upper part of the pulp returning component 4; the bottom of the signal line channel 80 extends to the bottom of the slurry return component 4. Each channel is respectively inserted with a sleeve 9 at the butt joint part of two adjacent components, a plurality of O-shaped sealing rings 11 are arranged between the outer peripheral surface of each sleeve 9 and the inner peripheral surface of the corresponding butt joint component for sealing, the O-shaped sealing rings 11 are cylindrical surface sealing, the sealing is tight, the leakage is not easy, and the sealing reliability is high; the O-shaped sealing ring 11 is embedded in a groove of the outer cylindrical surface of the sleeve 9, so that the precision requirement on the matching surfaces of the sleeve 9 and the connecting parts is low, and the processing difficulty is low; sleeve 9 sets up two at least O type sealing washers 11 between the part is connected with corresponding in this embodiment, and sleeve 9 has two at least sealed guarantees with connecting between the part, has further strengthened sealed strict density, and sealing reliability is higher.

As shown in fig. 1 and 10, the wall surface of the first connecting member 1 is provided with a plurality of inclined inverted suction duct channels 12, as shown in fig. 10, one part of the inverted suction duct channels 12 are inclined upwards, and the other part of the inverted suction duct channels 12 are inclined downwards; the slurry returning channel 30 and the reverse suction channel 70 are communicated by the reverse suction duct 12, and the reverse suction channel 70 sucks air in the slurry returning channel 30 through the reverse suction duct 12, so that the slurry returning channel 30 becomes a negative pressure channel, and slurry in pile holes is smoothly sucked into the slurry returning channel 30 and is conveyed upwards to be discharged under the action of negative pressure.

As shown in fig. 1 and 7, the water spray assembly 2 includes a water spray nozzle holder 21 and a water spray nozzle 22, wherein the upper end and the lower end of the water spray nozzle holder 21 are fixedly connected with the first connecting piece 1 and the second connecting piece 3 respectively through fasteners, a through radial hole channel 23 is formed on the circumferential wall surface of the water spray nozzle holder 21, and the radial hole channel 23 is communicated with a water supply channel 40; the two outer ports of the radial pore canal 23 are respectively inserted with water nozzles 22, and the water nozzles 22 are communicated with the water delivery channel 40 through the radial pore canal 23; as shown in fig. 7, the two water nozzles 22 are spaced by 180 degrees and symmetrically distributed on two opposite sides of the water nozzle seat 21, when high-pressure water is injected to pre-cut the pile hole, the reaction forces of the two water nozzles 22 acting on the drilling tool are opposite in direction and mutually offset, so that the influence of the reaction force on the drilling tool is avoided, the drilling tool is prevented from being inclined, and the straightness of the pile hole is ensured.

As shown in fig. 1 to 3 and 5 to 10, the upper end of the slurry return seat body 41 of the slurry return assembly 4 is fixedly connected to the second connecting member 3 by a fastener. The slurry returning seat body 41 is radially provided with a slurry returning port 42 communicated with the slurry returning channel 30, the slurry returning seat body 41 and the bottom of the slurry returning channel 30 are provided with a water reverse-suction valve assembly 43, the slurry returning seat body 41 and the lower part of the slurry returning channel 30 are radially provided with a water reverse-suction duct 44, the water reverse-suction duct 44 is communicated with the water reverse-suction channel 60 and the water reverse-suction valve assembly 43, after the water reverse-suction valve assembly 43 is opened, the water reverse-suction channel 60 can suck water in the slurry returning channel 30 through the water reverse-suction duct 44, the negative pressure environment of the slurry returning channel 30 is further improved, the slurry returning conveying performance is further improved, and the slurry is more favorably returned smoothly. The center of the bottom of the slurry return seat body 41 is provided with a blind hole along the axial direction, and the blind hole is communicated with the signal line channel 80 through a corresponding pore channel.

As shown in fig. 1 to 3 and 5 to 10, the upper end of the monitoring seat 51 of the monitoring assembly 5 is fixedly connected to the slurry return seat 41 by a fastener. A through placing cavity 52 is formed in the center of the monitoring seat body 51 along the axial direction, and the placing cavity 52 is communicated with a blind hole in the bottom of the slurry returning seat body 41; the placing cavity 52 is internally provided with an inclination angle sensor 53, the inclination angle sensor 53 is used for monitoring the construction angle of the drilling tool in real time, and a signal line of the inclination angle sensor 53 is led out through the placing cavity 52, a blind hole and a pore channel of the slurry return seat body 41 and a signal line channel 80 in sequence.

As shown in fig. 1, 2 and 5, the upper slurry spraying assembly 6 comprises a first slurry nozzle holder 61 and a first nozzle assembly 62; the upper end of the first slurry nozzle holder 61 is fixedly connected to the monitoring holder body 51 by a fastener. The center of the top of the first slurry nozzle seat 61 is provided with a blind hole axially communicated with the placing cavity 52 of the monitoring seat body 51, the bottom of the blind hole is inserted with a pressure sensor 54, the pressure sensor 54 is used for monitoring the pressure in the ground in real time, and a signal wire of the pressure sensor 54 is led out through the placing cavity 52, the blind hole and the pore passage of the slurry returning seat body 41 and a signal wire channel 80 in sequence. As shown in fig. 5, a first mounting hole 65 is radially formed in the middle of the first nozzle holder 61, a first nozzle assembly 62 is inserted into a port of the first mounting hole 65, and the first nozzle assembly 62 is offset from the water nozzle 22 by a certain angle; a first wear-resistant part 63 is inserted in the first mounting hole 65 and positioned at the inner side part of the first nozzle assembly 62, a first slurry feeding channel 64 which is through is formed in the first wear-resistant part 63, the first slurry feeding channel 64 conducts the first slurry feeding channel 10 and the first nozzle assembly 62, and high-pressure slurry conveyed from the first slurry feeding channel 10 is deflected through the first slurry feeding channel 64 of the first wear-resistant part 63 and then is sprayed out from the first nozzle assembly 62. The first slurry nozzle holder 61 is further provided with a duct for communicating the first nozzle assembly 62 with the air feed channel 50, and the high-pressure air fed from the air feed channel 50 is transmitted to the first nozzle assembly 62 through the corresponding duct and is ejected from the first nozzle assembly 62.

As shown in fig. 2 and 6, the lower slurry spraying assembly 7 includes a second slurry nozzle holder 71 and a second nozzle assembly 72; the upper end of the second slurry nozzle holder 71 is fixedly connected to the first slurry nozzle holder 61 by a fastener. As shown in fig. 6, a second mounting hole 75 is radially formed in the middle of the second slurry nozzle holder 71, a second nozzle assembly 72 is inserted into a port of the second mounting hole 75, the second nozzle assembly 72 is 180 degrees away from the first nozzle assembly 62 and is distributed on two opposite sides, and when the first nozzle assembly 62 and the second nozzle assembly 72 spray high-pressure slurry, reaction forces acting on a drilling tool are opposite in direction and offset with each other, so that the influence of the reaction forces on the drilling tool is avoided, the drilling tool is prevented from being inclined, the straightness of a formed pile is ensured, and the pile forming quality is ensured. A second wear-resistant part 73 is inserted into the second mounting hole 75 and located on the inner side of the second nozzle assembly 72, a second slurry feeding duct 74 is formed in the second wear-resistant part 73, the second slurry feeding duct 74 conducts the second slurry feeding channel 20 and the second nozzle assembly 72, and high-pressure slurry conveyed from the second slurry feeding channel 20 is deflected through the second slurry feeding duct 74 of the second wear-resistant part 73 and then is sprayed out of the second nozzle assembly 72. The first nozzle assembly 62 and the second slurry nozzle seat 71 transmit high-pressure slurry through slurry feeding channels of the wear-resistant parts respectively, and the wear-resistant parts bear the impact of the high-pressure slurry, so that the high-pressure slurry is prevented from directly impacting the slurry nozzle seat to damage the slurry nozzle seat; compared with a slurry nozzle seat, the wear-resistant part has better impact resistance, has longer effective working time under the same impact force, prolongs the replacement period of parts and further prolongs the service life of a drilling tool; and the manufacturing cost of the wear-resistant part is cheaper, the processing difficulty is lower, the dismounting difficulty is lower, and the replacement cost is lower. The second slurry nozzle holder 71 is further provided with a duct for communicating the second nozzle assembly 72 with the air feed channel 50, and the high-pressure air fed from the air feed channel 50 is transmitted to the second nozzle assembly 72 through the corresponding duct and is ejected from the second nozzle assembly 72. The high-pressure air sprayed out by the first nozzle assembly 62 and the second nozzle assembly 72 is further used for cutting pile holes, the cutting effect of high-pressure slurry on soil is improved, meanwhile, the high-pressure slurry is sprayed out from the periphery of the high-pressure slurry, the spraying direction of the high-pressure slurry is restrained, the spraying direction of the high-pressure slurry is ensured, and the spraying effect of the high-pressure slurry is improved.

When the pile hole pre-cutting device is actually used, high-pressure water is input from the water feeding channel 40 and is transmitted to the water nozzle 22 through the radial hole channel 23 to be sprayed out, and pile holes are pre-cut; high-pressure air is transmitted to the first nozzle assembly 62 and the second nozzle assembly 72 from the air feed channel 50, and is sprayed out of the first nozzle assembly 62 and the second nozzle assembly 72 for further pile hole cutting; high-pressure slurry is respectively transmitted to the first nozzle assembly 62 and the second nozzle assembly 72 from the first slurry feeding channel 10 and the second slurry feeding channel 20, is sprayed out from the first nozzle assembly 62 and the second nozzle assembly 72, and is injected into the pile hole to reinforce the pile.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.

Claims (10)

1. The utility model provides a high-pressure jet drilling tool, includes from last to down spray assembly (2) that connects gradually, return thick liquid subassembly (4), monitoring subassembly (5), go up spray assembly (6), lower spray assembly (7) and drill bit subassembly (8), its characterized in that: a first slurry feeding channel (10), a second slurry feeding channel (20), a slurry returning channel (30), a water feeding channel (40), a gas feeding channel (50), a reverse water sucking channel (60), a reverse gas sucking channel (70) and a signal line channel (80) are axially formed in the drilling tool, the reverse water sucking channel (60) and the reverse gas sucking channel (70) are respectively communicated with the slurry returning channel (30), and the signal line channel (80) is communicated with a monitoring component (5);

the two opposite sides of the water nozzle seat (21) of the water spray component (2) are respectively inserted with a water nozzle (22), and the water nozzles (22) are communicated with a water delivery channel (40) through radial pore channels (23);

a pulp returning port (42) communicated with the pulp returning channel (30) is formed in the pulp returning seat body (41) of the pulp returning component (4);

a first slurry nozzle seat (61) of the upper slurry spraying assembly (6) is radially provided with a first mounting hole (65), a first nozzle assembly (62) is inserted in the first mounting hole (65), and the first nozzle assembly (62) is respectively communicated with the first slurry feeding channel (10) and the air feeding channel (50) through a pore channel;

a second mounting hole (75) is formed in the second slurry nozzle seat (71) of the lower slurry spraying assembly (7) in the radial direction, a second nozzle assembly (72) is inserted into the second mounting hole (75), the second nozzle assembly (72) and the first nozzle assembly (62) are distributed on two opposite sides, and the second nozzle assembly (72) is communicated with the second slurry feeding channel (20) and the gas feeding channel (50) through a pore channel respectively.

2. The high pressure jet drill as recited in claim 1, wherein: a first wear-resistant part (63) is inserted into a first mounting hole (65) of the first slurry nozzle seat (61), a first slurry feeding hole channel (64) which is communicated with the first wear-resistant part (63) is formed in the first wear-resistant part (63), and the first slurry feeding hole channel (64) is communicated with the first slurry feeding channel (10) and the first nozzle assembly (62).

3. The high pressure jet drill as recited in claim 1, wherein: a second wear-resistant part (73) is inserted into a second mounting hole (75) of the second nozzle assembly (72), a second slurry feeding channel (74) which is communicated with the second wear-resistant part (73) is formed in the second wear-resistant part (73), and the second slurry feeding channel (74) is communicated with the second slurry feeding channel (20) and the second nozzle assembly (72).

4. The high pressure jet drill as recited in claim 1, wherein: a sleeve (9) is respectively inserted in the butt joint part of two adjacent components of each channel, and a plurality of sealing rings (11) are arranged between the outer peripheral surface of the sleeve (9) and the inner peripheral surface of the corresponding butt joint component.

5. The high pressure jet drill as recited in claim 4, wherein: at least two sealing rings (11) are arranged between the sleeve (9) and the corresponding connecting part; the sealing ring (11) is embedded in a groove of the outer cylindrical surface of the sleeve (9).

6. The high pressure jet drill as recited in claim 1, wherein: the bottom of the slurry return channel (30) extends into the slurry return component (4), the bottom of the first slurry feeding channel (10) extends into the slurry spraying component (6), the bottoms of the second slurry feeding channel (20), the water feeding channel (40) and the air feeding channel (50) extend into the lower slurry spraying component (7), and the bottoms of the inverted water suction channel (60), the inverted air suction channel (70) and the signal line channel (80) extend into the slurry return component (4).

7. The high pressure jet drill as recited in claim 1, wherein: a water backflow sucking valve component (43) is arranged on the pulp returning base body (41) and positioned at the bottom of the pulp returning channel (30), and the water backflow sucking valve component (43) is communicated with the water backflow sucking channel (60) through a water backflow sucking pore passage (44).

8. The high pressure jet drill as recited in claim 1, wherein: the bottom of the pulp return base body (41) is provided with a blind hole which is communicated with the signal line channel (80) through a corresponding pore channel; the top of the first slurry nozzle seat (61) is also provided with a blind hole, and the bottom of the blind hole is inserted with a pressure sensor (54); a through placing cavity (52) is formed in a monitoring base body (51) of the monitoring assembly (5), the placing cavity (52) is communicated with a blind hole in the bottom of the slurry return base body (41) and a blind hole in the top of the first slurry nozzle base (61), and an inclination angle sensor (53) is arranged in the placing cavity (52); the signal lines of the inclination angle sensor (53) and the pressure sensor (54) are led out from the signal line channel (80).

9. The high pressure jet drill as recited in claim 1, wherein: the upper end and the lower end of the water spray component (2) are respectively connected with a first connecting piece (1) and a second connecting piece (3); the wall surface of the first connecting piece (1) is provided with a plurality of inclined inverted air suction hole channels (12), and the inverted air suction hole channels (12) are communicated with the pulp return channel (30) and the inverted air suction channel (70).

10. The high pressure jet drill of claim 9, wherein: one part of the inverted air suction duct (12) inclines upwards, and the other part of the inverted air suction duct (12) inclines downwards.

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