CN113944424A - Hydraulic down-the-hole hammer - Google Patents
Hydraulic down-the-hole hammer Download PDFInfo
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- CN113944424A CN113944424A CN202010678203.1A CN202010678203A CN113944424A CN 113944424 A CN113944424 A CN 113944424A CN 202010678203 A CN202010678203 A CN 202010678203A CN 113944424 A CN113944424 A CN 113944424A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 199
- 238000005553 drilling Methods 0.000 claims description 14
- 239000011435 rock Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a hydraulic down-the-hole hammer, which comprises a water filter cavity, a reversing valve cavity, a water piston cavity, a water hammer shell, a directional shaft, a drill bit and a drill tool connecting sleeve, wherein the water filter cavity, the reversing valve cavity, the directional shaft and the water piston cavity are sequentially connected in the water hammer shell from right to left, the drill bit is connected to the left side of the water piston cavity through the drill tool connecting sleeve, the drill tool connecting sleeve is connected with the water hammer shell through threads, four flow channels are arranged on the reversing valve cavity, and high-pressure water is introduced into different cavities in the hydraulic down-the-hole hammer through respective axial circulation at different angles to provide high-pressure power for the work of the hydraulic down-the-hole hammer.
Description
Technical Field
The invention relates to the field of drilling tools, in particular to a hydraulic down-the-hole hammer.
Background
The current rock drilling techniques are typically pneumatic down-the-hole hammers and top-hammer hydraulic rock drills. The pneumatic down-the-hole hammer is a rock drilling technology driven by high-pressure gas, generally, the piston is driven to perform impact motion by utilizing the high-pressure gas, the reciprocating motion of the piston is controlled by opening and closing of a valve, generally, the piston and the valve are complex in design structure and integrated, a plurality of moving parts are provided, the maintenance is not easy, the part loss is large, the pressure of gas is limited and the gas is easy to leak, the drilling depth is limited, the energy consumption is large, and the pneumatic down-the-hole hammer carries a large amount of dust and chips during gas discharge drilling, so that the damage to the working environment is large. The top hammer type hydraulic rock drill has large transmission power loss, limited drilling depth and easy bending because a forming hole cannot be vertical. Therefore, a new rock drilling technology is urgently needed, the energy consumption is low, the operation environment is not damaged, the ultra-deep drilling depth is realized, and the forming hole verticality is realized.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide the hydraulic down-the-hole hammer which is simple in structure, less in moving parts, easy to install, maintain and replace and independent in moving part design, can recycle high-pressure water power and is more suitable for underground complex geological, deep hole, straight hole and water-rich geological operation.
The technical scheme is as follows: the hydraulic down-the-hole hammer comprises a water filter cavity, a reversing valve cavity, a water piston cavity, a water hammer shell, a directional shaft, a drill bit and a drilling tool connecting sleeve, wherein the water filter cavity, the reversing valve cavity, the directional shaft and the water piston cavity are sequentially connected in the water hammer shell from right to left;
the water filter cavity comprises a drill rod connector, a water filter, a filter sleeve and a filter cavity end cover, the outer wall of the left end of the drill rod connector is connected with the inner wall of the water hammer shell, the right end of the drill rod connector extends out of the water hammer shell to be connected with a high-pressure water source, the right end face of the filter cavity end cover is connected with the left end face of the drill rod connector, the left end face of the filter cavity end cover is connected with the end face of a reversing valve in the reversing valve cavity, the filter cavity end cover is provided with a through hole which can allow high-pressure water to flow into the reversing valve cavity from the water filter cavity, the water filter is arranged in the drill rod connector and the filter cavity end cover and is connected with the high-pressure water source in the drill rod connector, and the outer wall of the water filter is provided with the filter sleeve;
the reversing valve cavity comprises a reversing valve end cover, a reversing valve and a reversing valve cylinder, and a flow passage connected with a through-flow hole in the water filter cavity is arranged between the outer wall of the reversing valve cylinder and the inner wall of the water hammer shell; the outer wall of the reversing valve cylinder is provided with a groove communicated with the reversing valve, the groove is communicated with the flow channel, the groove is provided with a bulge corresponding to the inner wall of the water hammer shell, and the bulge divides the flow channel into a first flow channel on the right side and a second flow channel on the left side; the two ends of the reversing valve are of piston structures, the outer wall of the reversing valve is attached to the inner wall of a reversing valve cylinder, the outer wall of the right end of the reversing valve is connected with the inner wall of a reversing valve end cover, the inner wall of the left end of the reversing valve is connected with the outer wall of a directional shaft, the middle section of the reversing valve is provided with a through waist-shaped slotted hole which is circumferentially distributed, the center of the reversing valve is designed as a through hole, the outer wall of the reversing valve and a groove of the reversing valve cylinder form a reversing valve water inlet cavity, the outer wall of the right end of the reversing valve and a reversing valve end cover, and the inner wall of the reversing valve cylinder form a reversing valve right cavity;
the two ends of the directional shaft are in piston structures, the outer wall of the right end of the directional shaft is connected with the inner wall of the left end of the reversing valve, the outer wall of the left end of the directional shaft is connected with the inner wall of the right end of the water piston in the water piston cavity, the outer wall of the right end of the directional shaft is connected with the left end face of the reversing valve, the inner wall of the reversing valve cylinder forms a left cavity of the reversing valve, the outer wall of the left end of the directional shaft is connected with the inner wall of the reversing valve cylinder, the right end face of the water piston forms a right cavity of the water piston, the right cavity of the water piston is connected with a second flow passage, a third flow passage for connecting the right cavity of the water piston and the left cavity of the reversing valve and a fourth flow passage for connecting the right cavity of the water piston and the right cavity of the reversing valve are arranged on the reversing valve cylinder, and the center of the directional shaft is designed as a through hole and connected with the through hole of the center of the reversing valve;
the water piston cavity comprises a piston cylinder, a water piston and a piston end cover, the right end face of the piston cylinder is connected with the left end face of the reversing valve cylinder, the left end face of the piston cylinder is connected with the piston end cover, and the outer wall of the piston cylinder is connected with the inner wall of the water hammer shell; the water piston is arranged in the piston cylinder, the inner wall of the right end of the water piston is connected with the inner wall of the left end of the directional shaft, the left end of the water piston penetrates through the piston end cover, the outer wall of the right end of the water piston is provided with a shallow groove, and the center of the water piston is designed as a through hole and is connected with the through hole in the center of the directional shaft.
Preferably, steps which can be mutually meshed and positioned are arranged between the reversing valve cylinder and the piston cylinder.
Preferably, steps which can be mutually meshed and positioned are arranged between the piston cylinder and the piston end cover.
Preferably, a step which can be mutually meshed and positioned is arranged between the piston end cover and the water hammer shell.
Preferably, the fourth flow passage is provided with a left inlet and a right inlet in the right chamber of the water piston, and the left inlet and the second flow passage are on the same cross section.
Preferably, a seal is provided between each of the interconnected components.
Preferably, the diameter of the water piston is set between 30mm and 200 mm.
Preferably, the diameter of the water hammer shell is set between 50mm and 250 mm.
Preferably, the drill bit is provided with a valve which is opened by the impact force.
Has the advantages that: compared with the prior art, the invention has the following technical effects:
1. the invention has simple structure, less moving parts, two moving parts which move only and the reversing valve and the water piston are in water, can be well self-lubricated and has small loss;
2. the two moving parts are respectively designed in the two moving cavities, are independently installed and are easy to maintain and replace;
3. the high-pressure water power driven by the invention can reach hundreds of megapascals, is far greater than the pressure of gas, and can drill deeper holes;
4. the high-pressure water can be recycled, so that the energy consumption is saved;
5. the invention takes high-pressure water as a medium, and has better effect on water-rich geological operation.
Drawings
FIG. 1 is a sectional view of the front view of the present invention;
FIG. 2 is a schematic diagram of the invention with the water piston moving to the left and the diverter valve moving to the right;
FIG. 3 is a schematic diagram of the invention with the water piston moving to the right and the diverter valve moving to the right;
FIG. 4 is a schematic diagram of the movement of the reversing valve to the left and the water piston to the right in the present invention;
FIG. 5 is a schematic view showing the water piston moving to the left and the reversing valve moving to the left in the present invention.
Detailed Description
As shown in fig. 1, which is a sectional structure diagram of a front view of the present invention, the present invention includes a water filter cavity 1, a reversing valve cavity 2, a water piston cavity 3, a water hammer housing 4, a directional shaft 5, a drill bit 6 and a drill tool connecting sleeve 7, wherein the water filter cavity 1, the reversing valve cavity 2, the directional shaft 5 and the water piston cavity 3 are sequentially connected from right to left in the water hammer housing 4, the drill bit 6 is connected to the left side of the water piston cavity 3 through the drill tool connecting sleeve 7, the drill bit 6 is provided with a valve which can be opened by impact force, the drill tool connecting sleeve 7 is connected with the water hammer housing 4 through a thread, and meanwhile, a sealing member 8 is provided between all the mutually connected components in the present invention.
The water filter cavity 1 comprises a drill rod connector 11, a water filter 12, a filter sleeve 13 and a filter cavity end cover 14, wherein the outer wall of the left end of the drill rod connector 11 is connected with the inner wall of the water hammer shell 4, and the right end of the drill rod connector extends out of the water hammer shell 4 and is connected with a high-pressure water source; the right end face of the filter cavity end cover 14 is connected with the left end face of the drill rod connector 11, the left end face of the filter cavity end cover 14 is connected with the end face of a reversing valve 22 in the reversing valve cavity 2, and the filter cavity end cover 14 is provided with a through hole 15 which can enable high-pressure water to flow into the reversing valve cavity 2 from the water filter cavity 1; the water filter 12 is arranged in the drill rod connector 11 and the filter cavity end cover 14 and is connected with a high-pressure water source in the drill rod connector 11, and the outer wall of the water filter 12 is provided with a filter sleeve 13.
The reversing valve cavity 2 comprises a reversing valve end cover 21, a reversing valve 22 and a reversing valve cylinder 23, wherein a flow channel connected with a through-flow hole 15 in the water filter cavity 1 is arranged between the outer wall of the reversing valve cylinder 23 and the inner wall of the water hammer shell 4; a groove 24 communicated with the reversing valve 22 is formed in the outer wall of the reversing valve cylinder 23, the groove is communicated with a flow passage 24, a protrusion 41 is formed in the inner wall of the groove 24, corresponding to the water hammer shell 4, and the flow passage is divided into a first flow passage 25 on the right side and a second flow passage 26 on the left side by the protrusion 41; two ends of the reversing valve 22 are in a piston structure, the outer wall of the reversing valve 22 is attached to the inner wall of the reversing valve cylinder 23, the outer wall of the right end of the reversing valve 22 is connected with the inner wall of the reversing valve end cover 21, the inner wall of the left end is connected with the outer wall of the directional shaft 5, the middle section of the reversing valve 22 is provided with a through waist groove hole 29 which is circumferentially distributed, the center of the reversing valve 22 is designed as a through hole, the outer wall of the reversing valve 22 and a groove 24 of the reversing valve cylinder 23 form a reversing valve water inlet cavity 210, the outer wall of the right end of the reversing valve 22 and the reversing valve end cover 21, and the inner wall of the reversing valve cylinder 23 forms a reversing valve right cavity 211.
Two ends of a directional shaft 5 in the invention are in piston structures, the outer wall of the right end of the directional shaft 5 is connected with the inner wall of the left end of a reversing valve 22, the outer wall of the left end of the directional shaft 5 is connected with the inner wall of the right end of a water piston 32 in a water piston cavity 3, the outer wall of the right end of the directional shaft 5 is connected with the left end face of the reversing valve 22, the inner wall of a reversing valve cylinder 23 forms a reversing valve left cavity 212, the outer wall of the left end of the directional shaft 5 is connected with the inner wall of the reversing valve cylinder 23, the right end face of the water piston 32 forms a water piston right cavity 35, and the water piston right cavity 35 is connected with a second flow channel 26; the reversing valve cylinder 23 is provided with a third flow passage 27 for connecting the water piston right cavity 35 and the reversing valve left cavity 212 and a fourth flow passage 28 for connecting the water piston right cavity 35 and the reversing valve right cavity 211, the fourth flow passage 28 is provided with a left inlet and a right inlet in the water piston right cavity 35, and the left inlet and the second flow passage 26 are on the same cross section; the center of the directional shaft 5 is designed as a through hole and is connected with the central through hole of the reversing valve 22.
The water piston cavity 3 comprises a piston cylinder 31, a water piston 32 and a piston end cover 33, wherein the right end face of the piston cylinder 31 is connected with the left end face of a reversing valve cylinder 23, steps which can be mutually meshed and positioned are arranged between the reversing valve cylinder 23 and the piston cylinder 31, the left end face of the piston cylinder 31 is connected with the piston end cover 33, the steps which can be mutually meshed and positioned are arranged between the piston cylinder 31 and the piston end cover 33, and the outer wall of the piston cylinder 31 is connected with the inner wall of a water hammer shell 4; the water piston 32 is arranged in the piston cylinder 31, the inner wall of the right end of the water piston 32 is connected with the inner wall of the left end of the directional shaft 5, the left end of the water piston passes through a piston end cover 33, the outer wall of the right end of the water piston 32 is provided with a shallow groove 34, and the left end surface of the piston end cover 33 is provided with a step which can be mutually meshed with and positioned on the water hammer shell 4; the center of the water piston 32 is designed as a through hole and is connected with the central through hole of the directional shaft 5.
The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.
In this embodiment, the diameter of the water piston 32 is set to be 30mm-200mm, the diameter of the water hammer housing 4 is set to be 50mm-250mm, as shown in fig. 2, high-pressure water enters the filter chamber 16 formed by the inner wall of the drill rod connector 11, the outer wall of the filter sleeve 13 and the right inner wall of the filter chamber end cover 14 through the water filter 12 and the filter sleeve 13, enters the first flow passage 25 through the through-flow hole 15, enters the reversing valve water inlet chamber 210 through the first flow passage 25, then enters the water piston right chamber 35 through the reversing valve water inlet chamber 210 through the second flow passage 26, then enters the reversing valve left chamber 212 through the third flow passage 27 from the water piston right chamber 35, and simultaneously enters the reversing valve right chamber 211 through the fourth flow passage 28 from the water piston right chamber 35, at this time, during the flow of high-pressure water, the high-pressure water in the water piston right chamber 35 applies a leftward pressure to the right end face of the water piston 32, and pushes the water piston 32 to move leftward, impact energy is transmitted to the drill bit 6 after colliding with the drill bit 6 to complete the rock drilling action, part of high-pressure water flows out along with the valve which is opened by the impact force on the drill bit 6, and meanwhile, the high-pressure water entering the left cavity 212 of the reversing valve applies right pressure to the left end face of the reversing valve 22 to push the reversing valve 22 to move to the right.
As shown in fig. 3, when the reversing valve 22 runs to the through waist slot 29 to communicate with the reversing valve water inlet cavity 210, high-pressure water enters the reversing valve water inlet cavity 210 through the first flow channel 25, part of the high-pressure water directly enters the through hole in the center of the reversing valve 22 through the through waist slot 29, flows through the through hole in the center of the directional shaft 5 and the through hole in the center of the water piston 32, directly impacts the right end face of the drill bit 6, because the right end face of the drill bit 6 is not hermetically connected with the water piston 32, the high-pressure water enters the water piston left cavity 36 formed by the right end face of the drill tool connecting sleeve 7, the inner wall of the water hammer shell 4, the left end face of the piston end cover 33 and the outer wall of the water piston 32 through gaps, when the high-pressure water enters the water piston left cavity 36, the right pressure is applied to the left end face of the water piston 32 to push the water piston 32 to move rightwards, and at this time, the valve opened on the drill bit 6 is closed, and the high-pressure water does not flow out any more; meanwhile, part of the high-pressure water still enters the reversing valve water inlet cavity 210 through the first flow passage 25, then enters the water piston right cavity 35 through the second flow passage 26, and then enters the reversing valve left cavity 212 through the third flow passage 27 from the water piston right cavity 35, so that the right pressure is applied to the left end face of the reversing valve 22, and the reversing valve 22 is pushed to move rightwards.
As shown in fig. 4, when the water piston 32 moves to the right, the second flow passage 26 and the third flow passage 27 are cut off step by step, at this time, all the high-pressure water enters the through hole at the center of the reversing valve 22 through the through waist slot hole 29, flows through the through hole at the center of the directional shaft 5 and the through hole at the center of the water piston 32, enters the left cavity 36 of the water piston, and applies a pressure to the left end face of the water piston 32 to push the water piston 32 to move to the right; at this time, after the third flow channel 27 is cut off, all water in the left chamber 212 of the reversing valve is squeezed into the fourth flow channel 28 and enters the right chamber 211 of the reversing valve, and because no high-pressure water enters the left chamber 212 of the reversing valve, the rightward pressure applied to the left end surface of the reversing valve 22 disappears, and the high-pressure water in the right chamber 211 of the reversing valve generates pressure on the inner wall of the chamber to push the reversing valve 22 to move leftwards.
As shown in fig. 5, when the water piston 32 moves to the right to cut off the third flow channel 27, the high-pressure water in the right water piston cavity 35 is cut off to enter the left direction valve cavity 212, the shallow groove 34 on the water piston 32 is communicated with the second flow channel 26 and is simultaneously communicated with the left inlet of the fourth flow channel 28, at this time, the direction valve 22 moves to the left to cut off the connection position of the through waist slot 29 and the direction valve water inlet cavity 210, the high-pressure water is prevented from entering the center of the direction valve 22 through the through waist slot 29, after the high-pressure water enters the second flow channel 26 through the first flow channel 25, the right pressure is generated on the shallow groove 34 on the water piston 32, the water piston 32 is pushed to move to the right, at the same time, part of the high-pressure water enters the fourth flow channel 28 through the shallow groove 34 on the water piston 32 and the left inlet of the fourth flow channel 28 and reaches the direction valve right cavity 211, the direction valve 22 is pushed to move to the left, and when the water piston 32 moves to the third flow channel 27 to be communicated again, high-pressure water enters the reversing valve left cavity 212 from the water piston right cavity 35 again, the movement is circulated to the state shown in figure 2 again, the whole work flow is circulated, and the drilling of the rock stratum is realized by continuously circulating the whole work flow.
Claims (9)
1. A hydraulic down-the-hole hammer, characterized by: the water hammer comprises a water filter cavity (1), a reversing valve cavity (2), a water piston cavity (3), a water hammer shell (4), a directional shaft (5), a drill bit (6) and a drilling tool connecting sleeve (7), wherein the water filter cavity (1), the reversing valve cavity (2), the directional shaft (5) and the water piston cavity (3) are sequentially connected from right to left in the water hammer shell (4), the drill bit (6) is connected to the left side of the water piston cavity (3) through the drilling tool connecting sleeve (7), and the drilling tool connecting sleeve (7) is connected with the water hammer shell (4) through threads;
the water filter cavity (1) comprises a drill rod connector (11), a water filter (12), a filter sleeve (13) and a filter cavity end cover (14), the outer wall of the left end of the drill rod connector (11) is connected with the inner wall of the water hammer shell (4), the right end of the drill rod connector extends out of the water hammer shell (4) to be connected with a high-pressure water source, the right end face of the filter cavity end cover (14) is connected with the left end face of the drill rod connector (11), the left end face of the filter cavity end cover (14) is connected with the end face of a reversing valve (22) in the reversing valve cavity (2), the filter cavity end cover (14) is provided with a through hole (15) which can allow high-pressure water to flow into the reversing valve cavity (2) from the water filter cavity (1), the water filter (12) is arranged in the drill rod connector (11) and the filter cavity end cover (14), is connected with a high-pressure water source in the drill rod connector (11), and the outer wall of the water filter (12) is provided with a filter sleeve (13);
the reversing valve cavity (2) comprises a reversing valve end cover (21), a reversing valve (22) and a reversing valve cylinder (23), and a flow channel connected with a through flow hole (15) in the water filter cavity (1) is arranged between the outer wall of the reversing valve cylinder (23) and the inner wall of the water hammer shell (4); a groove (24) communicated with the reversing valve (22) is formed in the outer wall of the reversing valve cylinder (23), the groove (24) is communicated with the flow channel, a protrusion (41) is arranged on the inner wall, corresponding to the water hammer shell (4), of the groove (24), and the flow channel is divided into a first flow channel (25) on the right side and a second flow channel (26) on the left side by the protrusion (41); the two ends of the reversing valve (22) are of piston structures, the outer wall of the reversing valve (22) is attached to the inner wall of a reversing valve cylinder (23), the outer wall of the right end of the reversing valve (22) is connected with the inner wall of a reversing valve end cover (21), the inner wall of the left end is connected with the outer wall of a directional shaft (5), the middle section of the reversing valve (22) is provided with a through waist-shaped slotted hole (29) which is circumferentially distributed, the center of the reversing valve (22) is designed to be a through hole, the outer wall of the reversing valve (22) and a groove (24) of the reversing valve cylinder (23) form a reversing valve water inlet cavity (210), the outer wall of the right end of the reversing valve (22) and the reversing valve end cover (21), and the inner wall of the reversing valve cylinder (23) form a reversing valve right cavity (211);
the directional shaft (5) is of a piston structure at two ends, the outer wall of the right end of the directional shaft (5) is connected with the inner wall of the left end of a reversing valve (22), the outer wall of the left end of the directional shaft (5) is connected with the inner wall of the right end of a water piston (32) in a water piston cavity (3), the outer wall of the right end of the directional shaft (5) is connected with the left end of the reversing valve (22), the inner wall of a reversing valve cylinder (23) forms a left cavity (212) of the reversing valve, the outer wall of the left end of the directional shaft (5) is connected with the inner wall of the reversing valve cylinder (23), the right end of the water piston (32) forms a right cavity (35) of the water piston, the right cavity (35) of the water piston is connected with a second runner (25), a third runner (27) connecting the right cavity (35) of the water piston with the left cavity (212) of the reversing valve and a fourth runner (28) connecting the right cavity (35) of the water piston with the right cavity (211) of the reversing valve are arranged on the reversing valve cylinder (23), and the center of the directional shaft (5) is designed as a through hole, is connected with the central through hole of the reversing valve (22);
the water piston cavity (3) comprises a piston cylinder (31), a water piston (32) and a piston end cover (33), the right end face of the piston cylinder (31) is connected with the left end face of the reversing valve cylinder (23), the left end face of the piston cylinder (21) is connected with the piston end cover (33), and the outer wall of the piston cylinder (31) is connected with the inner wall of the water hammer shell (4); the water piston (32) is arranged in the piston cylinder (31), the inner wall of the right end of the water piston (32) is connected with the inner wall of the left end of the directional shaft (5), the left end of the water piston penetrates through the piston end cover (33), the outer wall of the right end of the water piston (32) is provided with a shallow groove (34), and the center of the water piston (32) is designed as a through hole and is connected with the central through hole of the directional shaft (5).
2. The hydraulic down-the-hole hammer according to claim 1, wherein steps capable of being mutually engaged and positioned are arranged between the reversing valve cylinder (23) and the piston cylinder (31).
3. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: and steps which can be mutually meshed and positioned are arranged between the piston cylinder (31) and the piston end cover (33).
4. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: steps which can be mutually meshed and positioned are arranged between the piston end cover (33) and the water hammer shell (4).
5. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: seals (8) are provided between the interconnected components.
6. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: the fourth flow channel (28) is provided with a left inlet and a right inlet in the right cavity (35) of the water piston, and the left inlet and the second flow channel (26) are on the same cross section.
7. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: the diameter of the water piston (32) is set between 30mm and 200 mm.
8. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: the diameter of the water hammer shell (4) is set between 50mm and 250 mm.
9. A hydraulic down-the-hole hammer as set forth in claim 1, wherein: the drill bit (6) is provided with a valve which can be opened under the impact force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010678203.1A CN113944424B (en) | 2020-07-15 | 2020-07-15 | Hydraulic down-the-hole hammer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010678203.1A CN113944424B (en) | 2020-07-15 | 2020-07-15 | Hydraulic down-the-hole hammer |
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| Publication Number | Publication Date |
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| CN113944424A true CN113944424A (en) | 2022-01-18 |
| CN113944424B CN113944424B (en) | 2023-06-09 |
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