CN211950337U - Impact rotary jet drilling tool - Google Patents
Impact rotary jet drilling tool Download PDFInfo
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- CN211950337U CN211950337U CN202020487779.5U CN202020487779U CN211950337U CN 211950337 U CN211950337 U CN 211950337U CN 202020487779 U CN202020487779 U CN 202020487779U CN 211950337 U CN211950337 U CN 211950337U
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Abstract
The utility model discloses an impact rotary jet drilling tool, a rotating shaft component, a drilling rod component and a nozzle drilling head component are connected in sequence; the drill rod assembly is of an inner pipe and outer pipe double-layer structure, a first channel is arranged between the inner pipe and the outer pipe, and a central through hole of the inner pipe is a second channel; the rotating shaft assembly is provided with a water inlet and an air inlet, the water inlet is communicated with the second channel, and the air inlet is communicated with the first channel; the nozzle drill bit assembly is provided with a nozzle and a drill bit, a central channel of the nozzle is communicated with the second channel, and an outer channel of the nozzle is communicated with the first channel; an elastic unidirectional plugging structure is arranged between the nozzle and the drill bit. The utility model discloses creep into and accomplish the back, do not need the processing rig to withdraw from, change the drilling tool, only need pull down the back with the drilling rod subassembly from the pivot subassembly, put in a steel ball, can carry out the jet grouting construction, adopt one set of drilling tool just can accomplish the draw hole and creep into the construction and jet grouting construction soon, construction process is simple, and construction cost is low, and the drilling rod is dismantled conveniently, swiftly, has reduced the constructor time.
Description
Technical Field
The utility model belongs to the technical field of drilling equipment technique and specifically relates to an impact 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. As the rotary spraying drilling machine is generally difficult to directly penetrate stratums containing pebble beds, rock beds or sand beds and the like, when rotary spraying is carried out in the stratums, hole guiding construction is generally needed firstly, PVC pipes are arranged in drilled holes for wall protection, and then rotary spraying construction is carried out; the conventional jet grouting drilling machine generally adopts a flow divider to convey different media (water, gas and slurry) into each channel of a drill rod, the flow divider generally comprises a plurality of parts to form different channels, the flow divider is easily damaged under the action of larger impact force, therefore, the conventional jet grouting drilling machine cannot directly adopt top drive impact to carry out hole leading construction, only other top drive impact drilling machines can be adopted to carry out hole leading construction, and then the jet grouting drilling machine is adopted to carry out jet grouting construction.
SUMMERY OF THE UTILITY MODEL
The applicant aims at the defects that when the conventional jet grouting drilling tool is used for constructing stratums containing pebble beds, rock beds or sand beds and the like, other drilling machines are needed to be adopted for hole leading construction at first, and jet grouting construction is carried out after the hole leading drilling machines are removed, so that the construction process is more complicated, the construction cost is higher, the construction time is longer and the like.
The utility model discloses the technical scheme who adopts as follows:
a rotary percussion drilling tool comprises a rotating shaft assembly, a drill rod assembly and a nozzle drill bit assembly which are sequentially connected; the drill rod assembly is of an inner pipe and outer pipe double-layer structure, an annular gap between the inner pipe and the outer pipe is a first channel, and a central through hole of the inner pipe is a second channel; a main shaft of the rotating shaft assembly is provided with a water inlet and an air inlet, the water inlet is communicated with the second channel, and the air inlet is communicated with the first channel; the nozzle drill bit assembly is provided with a nozzle and a drill bit, the nozzle is positioned above the drill bit, a central channel of the nozzle is communicated with the second channel, and an outer channel of the nozzle is communicated with the first channel; an elastic unidirectional plugging structure is arranged between the nozzle and the drill bit; when the hole leading construction is carried out, the liquid pressure of the second channel is conducted when being larger than the elastic force of the elastic plugging structure and is closed when being smaller than the elastic force of the elastic plugging structure; when spraying work time soon, place the passageway that the shutoff piece can shutoff drill bit in the second passageway.
The utility model discloses creep into and accomplish the back, do not need the processing rig to withdraw from, change the drilling tool, only need pull down the back with the drilling rod subassembly from the pivot subassembly, put in a steel ball, can carry out the jet grouting construction, adopt one set of drilling tool just can accomplish the draw hole and creep into the construction and jet grouting construction soon, construction process is simple, and construction cost is low, and the drilling rod is dismantled conveniently, swiftly, has reduced the constructor time.
As a further improvement of the above technical solution:
the elastic one-way blocking structure comprises a spring and a steel ball, the outer diameter of the spring is smaller than that of the steel ball, a baffle is arranged on the lower end face of the spring, the upper end face of the spring abuts against the steel ball, and in an initial state, the spring is in a compressed state and presses the steel ball against a corresponding step face in the nozzle seat; or the elastic one-way plugging structure is a one-way valve structure.
The nozzle seat is provided with a sleeve, the center of the sleeve is provided with a step through hole with a large lower part and a small upper part and a through second channel, the spring and the steel ball are arranged in the step hole with a large aperture at the lower part of the sleeve, and the outer diameter of the steel ball is smaller than the inner diameter of the large step hole at the lower part and larger than the inner diameter of the small step at the upper part.
The center of the main shaft is longitudinally provided with a blind hole which is communicated with the second channel, and the water inlet is communicated with the blind hole through the first input channel.
The first input channel is one or a plurality of through holes uniformly arranged along the circumferential direction.
A plurality of shunting holes are formed in the outer side, located on the blind hole, of the main shaft, the shunting holes are communicated with the first channel, the air inlet is communicated with the shunting holes through the second input channel, and the second input channel is not communicated with the blind hole.
The second input channel is a ring of annular grooves formed along the circumferential direction or a plurality of blind holes uniformly formed along the circumferential direction.
The lower end part of the blind hole of the main shaft is provided with a first upper inner joint, the outer cylindrical surface of the supporting part at the upper end part of the first upper inner joint is provided with a plurality of raised key teeth along the circumferential direction, and a gap between every two adjacent key teeth conducts the shunting hole and the first channel.
The water inlet and the air inlet on the rotating shaft assembly are positioned on the same side of the same longitudinal section, and the central shafts of the water inlet and the air inlet are parallel to each other.
The utility model discloses a water inlet and air inlet are located same one side of same longitudinal section, and the two center pin is parallel to each other, and the water inlet is parallel to each other with the air inlet, is located the homonymy, then can set up in same one side with the water supply installation that the water inlet is connected and the air feeder who is connected with the air inlet, and overall structure can design compacter, can save installation space, is applicable to the less region of installation space, and the suitability is more extensive.
The periphery of the main shaft is sleeved with a sleeve.
The utility model has the advantages as follows:
the utility model discloses creep into and accomplish the back, do not need the processing rig to withdraw from, change the drilling tool, only need pull down the back with the drilling rod subassembly from the pivot subassembly, put in a steel ball, can carry out the jet grouting construction, adopt one set of drilling tool just can accomplish the draw hole and creep into the construction and jet grouting construction soon, construction process is simple, and construction cost is low, and the drilling rod is dismantled conveniently, swiftly, has reduced the constructor time.
The utility model discloses a water inlet and air inlet are located same one side of same longitudinal section, and the two center pin is parallel to each other, and the water inlet is parallel to each other with the air inlet, is located the homonymy, then can set up in same one side with the water supply installation that the water inlet is connected and the air feeder who is connected with the air inlet, and overall structure can design compacter, can save installation space, is applicable to the less region of installation space, and the suitability is more extensive.
Drawings
Fig. 1 is a sectional view of the present invention, which is in a drilling state.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a cross-sectional view of the present invention, which is in a jet grouting state.
Fig. 4 is a sectional view of B-B in fig. 3.
Fig. 5 is an enlarged view of a portion C in fig. 3.
Fig. 6 is an enlarged view of a portion D in fig. 3.
Fig. 7 is an enlarged view of a portion E in fig. 3.
In the figure: 1. a main shaft; 2. a sleeve; 3. a water inlet; 4. an air inlet; 5. an upper outer joint; 6. a first upper inner joint; 7. a second upper inner joint; 8. an outer tube; 9. an inner tube; 10. a first lower inner joint; 11. a second lower inner joint; 12. a lower outer joint; 13. a nozzle; 14. a nozzle holder; 15. a drill bit; 16. a sleeve; 17. a spring; 18. a steel ball; 19. a first channel; 20. a second channel; 21. a first input channel; 22. blind holes; 23. a second input channel; 24. a shunt hole; 25. a first counterbore; 26. a support portion; 27. a spring mounting portion; 28. a second counterbore; 29. a central channel; 30. an outer channel.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the utility model discloses from last to being pivot subassembly, drill rod subassembly, nozzle bit subassembly down in proper order, on the upper end of drill rod subassembly was connected to the pivot subassembly through joint Assembly, the lower extreme of drill rod subassembly passed through joint Assembly and connects nozzle bit subassembly.
As shown in fig. 1 and fig. 2, a sleeve 2 is sleeved on the periphery of a main shaft 1 of the rotating shaft assembly, a water inlet 3 and an air inlet 4 are radially embedded in the periphery of the sleeve 2, the water inlet 3 and the air inlet 4 are positioned on the same side of the same longitudinal section, central axes of the water inlet and the air inlet are parallel to each other, the water inlet 3 and the air inlet 4 are parallel to each other and positioned on the same side, a water supply device connected with the water inlet 3 and an air supply device connected with the air inlet 4 can be arranged on the same side, the whole structure can be designed to be more compact, the installation space can be saved, the. The upper end part of the main shaft 1 is longitudinally provided with a central hole connected with a driving device, the center of the main shaft 1 is also longitudinally provided with a blind hole 22 with an open end positioned at the lower end part, the opening part of the blind hole 22 is provided with a first counter bore 25, and the inner wall surface of the first counter bore 25 is provided with threads; a first input channel 21 and a second input channel 23 are respectively arranged on the main shaft 1 along the radial direction corresponding to the water inlet 3 and the air inlet 4, the first input channel 21 is one or a plurality of through holes uniformly arranged along the circumferential direction and penetrates through the water inlet 3 and the blind hole 22; the second input channel 23 is preferably a ring of annular groove formed along the circumferential direction, and certainly, the second input channel 23 may also be a plurality of blind holes uniformly formed along the circumferential direction; as shown in fig. 4, the second input channel 23 is not communicated with the blind hole 22, and a certain wall thickness is reserved between the bottom of the second input channel and the blind hole 22; the main shaft 1 is positioned at the outer side of the blind hole 22, a plurality of shunting holes 24 are formed along the circumferential direction, and the shunting holes 24 penetrate through the second input channel 23; as shown in fig. 1 and 2, an upper outer joint 5 is fixedly arranged in a first counter bore 25 of the lower end portion of a main shaft 1 through threads, a first upper inner joint 6 is arranged in a step hole in the center of the upper outer joint 5, a first channel 19 is formed by an annular gap between the inner circumferential surface of the upper outer joint 5 and the outer circumferential surface of the first upper inner joint 6, as shown in fig. 4, the top end of the first upper inner joint 6 extends into a blind hole 22 of the main shaft 1, a sealing member is arranged between the matching surfaces of the two, the blind hole 22 is communicated with a central through hole of the first upper inner joint 6 to form a second channel 20, a supporting portion 26 is arranged at a position between the bottom surface of the first counter bore 25 and the step surface of the upper outer joint 5 of the first upper inner joint 6, the lower end surface of the supporting portion 26 is arranged on the step surface of the upper outer joint 5, a retaining ring is arranged on the outer side of the upper end surface of the supporting portion 26 for axial limiting, as, as shown in fig. 4, a gap formed between two adjacent key teeth and the corresponding inner circumferential surface of the upper outer joint 5 communicates with the diversion hole 24 and the first channel 19; the outer periphery of the lower end of the first upper inner joint 6 is sleeved on the upper end of the second upper inner joint 7, a sealing member is arranged between the matching surfaces of the two, the central through hole of the second upper inner joint 7 is communicated with the central through hole of the first upper inner joint 6 to form a second channel 20, and an annular gap is formed between the outer periphery of the upper part of the second upper inner joint 7 and the inner periphery of the upper outer joint 5 to form a first channel 19.
As shown in fig. 1 and 2, the drill rod assembly has a double-layer structure of inner and outer pipes, wherein the inner pipe 9 is inserted into the central through hole of the outer pipe 8, the central through hole of the inner pipe 9 is a second passage 20, and the annular gap between the outer circumferential surface of the inner pipe 9 and the inner circumferential surface of the outer pipe 8 is a first passage 19; as shown in fig. 4, the upper end of the outer pipe 8 is fixedly connected to the outer periphery of the lower end of the upper outer joint 5 by screw threads, and a sealing member is arranged between the matching surfaces of the upper end and the lower end; as shown in fig. 1 and 2, the upper end of the inner pipe 9 is fitted around the outer periphery of the lower end of the second upper inner joint 7, and an annular gap is formed between the outer peripheral surface of the lower portion of the second upper inner joint 7 and the inner peripheral surface of the outer pipe 8 to form a first passage 19; as shown in fig. 5, the lower end of the outer tube 8 is fixedly connected with a lower outer joint 12 through a screw thread, a sealing member is arranged between the matching surfaces of the lower outer joint and the lower outer joint, a first lower inner joint 10 is inserted into a central through hole of the lower outer joint 12, and an annular gap is formed between the outer circumferential surface of the first lower inner joint 10 and the inner circumferential surface of the lower outer joint 12 to form a first channel 19; the upper end of the first lower nipple 10 extends into the lower end of the inner tube 9, and its central through hole is in communication with the central through hole of the inner tube 9 to form a second channel 20.
As shown in fig. 1 and 2, a stepped through hole is formed in the center of a nozzle holder 14 of the nozzle-bit assembly, a second lower inner joint 11 is installed in the stepped through hole, the stepped hole of the lower port of the nozzle holder 14 is fixedly connected with a bit 15 through threads, and the bit 15 is located below the second lower inner joint 11; as shown in fig. 5, the upper end of the nozzle holder 14 is screwed to the outer periphery of the lower end of the lower outer joint 12, a sealing member is arranged between the mating surfaces of the two, the upper end of the second lower inner joint 11 is sleeved on the outer periphery of the lower end of the first lower inner joint 10, a sealing member is arranged between the mating surfaces of the two, an annular gap is formed between the outer peripheral surface of the second lower inner joint 11 and the inner peripheral surface of the lower outer joint 12 to form a first channel 19, and the central through hole of the second lower inner joint 11 is communicated with the central through hole of the first lower inner joint 10 to form a second channel 20; as shown in fig. 2 and 6, a plurality of nozzles 13 are radially arranged on the nozzle holder 14 at the position with the smallest step diameter, the inner ends of the nozzles 13 penetrate through the second lower inner joint 11, the central channel 29 of the nozzles 13 is communicated with the second channel 20, the outer channel 30 on the periphery of the central channel 29 on the nozzles 13 is communicated with the first channel 19, the air inlet 4 supplies high-pressure air to the nozzles 13 through the through first channel 19, and the water inlet 3 supplies high-pressure water to the nozzles 13 through the through second channel 20; the lower end of the second lower inner joint 11, which is positioned below the nozzle 13, is provided with a spring mounting part 27, the spring mounting part 27 is arranged in a step hole of the nozzle holder 14 positioned above the drill bit 15, a sealing element is arranged between the matching surfaces of the spring mounting part and the drill bit 15, the upper end surface of the spring mounting part 27 abuts against the corresponding step surface in the nozzle holder 14, the lower end surface abuts against the upper end surface of the drill bit 15, the center of the spring mounting part 27 is provided with a second counter bore 28, a sleeve 16 is arranged in the second counter bore 28, a sealing element is arranged between the matching surfaces of the spring mounting part and the sleeve, and the center of the sleeve 16 is provided with a; as shown in fig. 2, a spring 17 and a steel ball 18 are arranged in a stepped hole with a large aperture at the lower part of the sleeve 16, the outer diameter of the steel ball 18 is smaller than the inner diameter of the large stepped hole at the lower part and larger than the inner diameter of the small step at the upper part, and the outer diameter of the spring 17 is smaller than the outer diameter of the steel ball 18; the lower end face of the sleeve 16 is fixedly provided with a baffle plate, the lower end face of the spring 17 is pressed tightly, the baffle plate is provided with a central through hole for communicating the drill bit 15 and the second channel 20, the upper end face of the spring 17 is pressed against the steel ball 18, and in an initial state, the spring 17 is in a compression state and presses the steel ball 18 against a corresponding step face in the sleeve 16; when the high-pressure water in the second channel 20 overcomes the elastic force of the spring 17, the steel ball 18 and the spring 17 are extruded downwards to conduct the second channel 20 and the drill bit 15, and during the percussion drilling construction, one part of the high-pressure water in the second channel 20 is sprayed to the periphery from the nozzle 13, and the other part of the high-pressure water is sprayed to the front part from the water outlet of the drill bit 15; as shown in fig. 6, another steel ball 18 is put into the second channel 20 from the drill rod assembly, and the steel ball 18 is under the pressure of the high-pressure water to block the step through hole of the sleeve 16, so as to block the water outlet channel of the drill bit 15, and the high-pressure water can only flow out from the channel of the nozzle 13.
When the utility model works, the main shaft 1 of the rotating shaft component is connected with the driving device, the water inlet 3 is connected with the water supply device, and the air inlet 4 is connected with the air supply device; during percussion drilling construction, the driving device drives the drill bit 15 of the nozzle drill bit assembly to drill downwards, the water supply device inputs high-pressure water into the second channel 20 through the water inlet 3, then the high-pressure water is respectively sprayed from the nozzle 13 and the drill bit 15, the sprayed high-pressure water can lubricate and cool the drill bit 15, and drill slag formed by drilling is carried along the hole wall and returns to the bottom surface; when in rotary spraying work, one steel ball 18 is thrown into the second channel 20 from the upper part of the drill rod assembly to block the channel of the drill bit 15, high-pressure water is input into the second channel 20 through the water inlet 3 by the water supply device, high-pressure air is input into the first channel 19 through the air inlet 4 by the air supply device, the nozzle drill bit assembly is driven to rotate by the driving device, the high-pressure air in the first channel 19 is sprayed out from the outer channel 30 of the nozzle 13, and the high-pressure water in the second channel 20 is sprayed out from the central channel 29 of the nozzle 13 to carry out rotary spraying construction. The utility model discloses creep into and accomplish the back, do not need the processing rig to withdraw from, change the drilling tool, only need pull down the back with the drilling rod subassembly from the pivot subassembly, put in a steel ball 18, can carry out the jet grouting construction, adopt one set of drilling tool just can accomplish the draw hole and creep into the construction and jet grouting construction soon, construction process is simple, and construction cost is low, and the drilling rod is dismantled conveniently, swiftly, has reduced the constructor time.
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. For example, a one-way valve structure may be disposed between the drill bit 15 and the nozzle 13 as an elastic one-way blocking structure, or another elastic element and a plug may be disposed above the drill bit 15 and the nozzle 13 as an elastic one-way blocking structure, so as to achieve a one-way communication function, and achieve the purpose that the one-way valve or the plug can be pushed by high-pressure water to communicate the drill bit 15 and the second channel 20 during drilling.
Claims (10)
1. An impact rotary jet drilling tool is characterized in that: the rotating shaft assembly, the drill rod assembly and the nozzle drill bit assembly are sequentially connected;
the drill rod component is of an inner pipe and outer pipe double-layer structure, an annular gap between an inner pipe (9) and an outer pipe (8) is a first channel (19), and a central through hole of the inner pipe (9) is a second channel (20);
a water inlet (3) and an air inlet (4) are arranged on a main shaft (1) of the rotating shaft assembly, the water inlet (3) is communicated with the second channel (20), and the air inlet (4) is communicated with the first channel (19);
the nozzle drill bit assembly is provided with a nozzle (13) and a drill bit (15), the nozzle (13) is positioned above the drill bit (15), a central channel (29) of the nozzle (13) is communicated with the second channel (20), and an outer channel (30) is communicated with the first channel (19); an elastic unidirectional plugging structure is arranged between the nozzle (13) and the drill bit (15); when the hole leading construction is carried out, the liquid pressure of the second channel (20) is conducted when being larger than the elastic force of the elastic plugging structure and is closed when being smaller than the elastic force of the elastic plugging structure; when the spraying machine works, a plugging piece is placed in the second channel (20) to plug the channel of the drill bit (15).
2. The percussion jet drilling tool according to claim 1, wherein: the elastic one-way blocking structure comprises a spring (17) and a steel ball (18), the outer diameter of the spring (17) is smaller than that of the steel ball (18), a baffle is arranged on the lower end face of the spring (17), the upper end face of the spring abuts against the steel ball (18), and in an initial state, the spring (17) is in a compressed state and presses the steel ball (18) against a corresponding step surface in the nozzle seat (14); or the elastic one-way plugging structure is a one-way valve structure.
3. The percussion jet drilling tool according to claim 2, wherein: the nozzle seat (14) is provided with a sleeve (16), the center of the sleeve (16) is provided with a step through hole with a large lower part and a small upper part and a through second channel (20), a spring (17) and a steel ball (18) are arranged in the step hole with a large aperture at the lower part of the sleeve (16), and the outer diameter of the steel ball (18) is smaller than the inner diameter of the large step hole at the lower part and larger than the inner diameter of the small step at the upper part.
4. The percussion jet drilling tool according to claim 1, wherein: the center of the main shaft (1) is longitudinally provided with a blind hole (22), the blind hole (22) is communicated with the second channel (20), and the water inlet (3) is communicated with the blind hole (22) through the first input channel (21).
5. The percussion jet drilling tool according to claim 4, wherein: the first input channel (21) is one or a plurality of through holes uniformly arranged along the circumferential direction.
6. The percussion jet drilling tool according to claim 1, wherein: a plurality of shunting holes (24) are formed in the outer side, located on the blind hole (22), of the main shaft (1), the shunting holes (24) are communicated with the first channel (19), the air inlet (4) is communicated with the shunting holes (24) through the second input channel (23), and the second input channel (23) is not communicated with the blind hole (22).
7. The percussion jet drilling tool according to claim 6, wherein: the second input channel (23) is a ring of annular grooves formed along the circumferential direction or a plurality of blind holes uniformly formed along the circumferential direction.
8. The percussion jet drilling tool according to claim 6, wherein: the lower end part of a blind hole (22) of the main shaft (1) is provided with a first upper inner joint (6), the outer cylindrical surface of a supporting part (26) at the upper end part of the first upper inner joint (6) is provided with a plurality of raised key teeth along the circumferential direction, and a gap between two adjacent key teeth conducts the shunting hole (24) and the first channel (19).
9. The percussion jet drilling tool according to claim 1, wherein: the water inlet (3) and the air inlet (4) on the rotating shaft assembly are positioned on the same side of the same longitudinal section, and the central shafts of the water inlet and the air inlet are parallel to each other.
10. The percussion jet drilling tool according to claim 1, wherein: the periphery of the main shaft (1) is sleeved with a sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020487779.5U CN211950337U (en) | 2020-04-07 | 2020-04-07 | Impact rotary jet drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020487779.5U CN211950337U (en) | 2020-04-07 | 2020-04-07 | Impact rotary jet drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211950337U true CN211950337U (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020487779.5U Active CN211950337U (en) | 2020-04-07 | 2020-04-07 | Impact rotary jet drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211950337U (en) |
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2020
- 2020-04-07 CN CN202020487779.5U patent/CN211950337U/en active Active
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Denomination of utility model: Percussive rotary jet drilling tool Effective date of registration: 20220120 Granted publication date: 20201117 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Xishan branch Pledgor: WUXI ANMAN CONSTRUCTION MACHINERY CO.,LTD. Registration number: Y2022320010029 |