A horizontal hydraulic drive water hammer impact drill and a drilling method thereof

Abstract

The present application relates to the technical field of mine drilling, and particularly relates to a horizontal water-driven water hammer impact drilling tool and a drilling method thereof, which comprises a connecting head, a connecting outer pipe and an impact drill bit, a movable valve is installed in the connecting outer pipe, a percussion hammer is sleeved on the movable valve, the percussion hammer is provided with a flow-through hole, the movable valve blocks the end of the flow-through hole, a flow-out hole is formed in the movable valve, a first water pressure stress surface is formed on the side of the movable valve away from the percussion hammer, a second water pressure stress surface is formed on the other side of the movable valve, the first water pressure stress surface is smaller than the second water pressure stress surface, a third water pressure stress surface is formed on the side of the percussion hammer close to the movable valve, a fourth water pressure stress surface is formed on the other side of the percussion hammer, the area of the third water pressure stress surface is smaller than the area of the fourth water pressure stress surface, an anvil is movably arranged in the impact slide, and a punch is fixed on the anvil, a water hammer effect occurs in the movable valve during the impact process, the huge water hammer pressure pushes the movable valve to accelerate movement, the punch has a large enough impact force, and the mine drilling process is not prone to deflection.

Description

Technical Field

[0001] This invention relates to the field of mining drilling technology, and in particular to a horizontally driven water hammer impact drill and its drilling method. Background Technology

[0002] For a long time to come, coal will remain a major energy source with an irreplaceable position. Therefore, it is urgent to vigorously strengthen research on safe and efficient mining and utilization technologies for coal resources.

[0003] In related technologies, Chinese patent with publication number CN107083922B discloses a pneumatic self-advancing ultra-high pressure pulse jet assisted impact rock breaking device. When it is working, the air compressor compresses the air, and the compressed air drives the impact piston to move. The impact piston drives the impact drill bit to move, thereby breaking the rock with the impact drill bit. At the same time, it uses ultra-high pressure pulse jet to assist in impacting hard rock.

[0004] Regarding the above technical solution, the impact force of the impact drill bit mainly relies on the air compressor for control. The higher the hardness of the rock in the mine, the higher the requirements for the air compressor. When the hardness of the rock in the mine is too high, the air compressor cannot provide enough compressed air, which will result in insufficient impact force of the impact drill bit, causing the borehole to deviate and resulting in low drilling efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a horizontally driven water hammer impact drill and its drilling method. During the impact process, a water hammer effect occurs within the valve, generating enormous water hammer pressure that accelerates the valve and the impact hammer. Under the influence of the water hammer effect, the water hammer pressure is tens of times that of water pressure, giving the impact head a sufficiently large impact force, making it less prone to deviation during mining drilling. Simultaneously, the drive device drives the impact drill bit to break through the rock strata. The combined action of the impact drill bit and the impact drill bit improves the drilling efficiency in hard rock.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: a horizontally driven water hammer impact drill, comprising a connector, a connecting outer tube, and an impact drill bit connected in sequence. The connector has a connecting hole, the connecting outer tube forms an installation cavity, the drill bit has an impact slide, and the impact drill bit has an impact hole. The connecting hole, the installation cavity, the impact slide, and the impact hole are sequentially connected. A guide sleeve is fixed within the installation cavity, and a valve is slidably mounted on the guide sleeve. A first sealing ring is provided between the guide sleeve and the valve. A limiting sleeve restricting the movement of the valve is provided within the installation cavity. A hammer is slidably mounted on the valve, and a second sealing ring is provided between the valve and the hammer. A third sealing ring is provided between the inner wall of the installation cavity and the hammer. A flow hole is provided at the end of the hammer away from the valve, and the valve blocks the end of the flow hole. Multiple drainage holes are provided on the peripheral wall, and the drainage holes are located between the second sealing ring and the third sealing ring. The side of the valve away from the impact hammer forms a first water pressure bearing surface, and the side of the valve close to the impact hammer forms a second water pressure bearing surface. The area of ​​the first water pressure bearing surface is smaller than the area of ​​the second water pressure bearing surface. The side of the impact hammer close to the valve forms a third water pressure bearing surface, and the side of the impact hammer away from the valve forms a fourth water pressure bearing surface. The area of ​​the third water pressure bearing surface is smaller than the area of ​​the fourth water pressure bearing surface. A throttling hole is provided on the peripheral wall of the impact hammer, and the two ends of the throttling hole are respectively connected to the mounting cavity and the flow hole. An anvil is slidably arranged in the impact slide. A punch is provided at the end of the anvil away from the impact hammer. The punch penetrates the impact hole. A return spring assembly is provided at the end of the anvil close to the punch. The return spring assembly abuts against the end of the impact hammer away from the valve.

[0007] In practical use, the present invention is as follows: the impact drill bit and the drive device that drives the impact drill bit to rotate are connected, and the water supply system and the connector are connected. In the non-working state, the spring assembly presses against the impact hammer, so that the impact hammer and the valve are pressed together. At this time, the end of the valve blocking the flow hole is blocked. When the working state is entered, the water supply system continuously supplies water, and water enters the inside of the valve. Under the action of the first sealing ring and the second sealing ring, the water flow cannot flow out of the valve, the internal pressure of the valve rises, and drives the valve and the impact hammer to make impact movement. When the valve hits the limit sleeve, the valve stops moving, and the impact hammer continues to move under the action of inertia, driving the punch to impact the rock strata, thus completing one impact. After the valve and the hammer separate, water flows out through the drain hole and quickly fills both sides of the valve. At this time, the water flows on the first and second water pressure surfaces. Since the area of ​​the second water pressure surface is larger than that of the first water pressure surface, the valve automatically resets. Similarly, the water flows through the throttling hole and fills the chambers at both ends of the hammer. The water flows on the third and fourth water pressure surfaces. Since the area of ​​the fourth water pressure surface is larger than that of the third water pressure surface, the hammer also resets after the valve resets. At the moment the valve and the hammer come into contact, the valve blocks the flow hole again. At this time, a water hammer effect occurs inside the valve, generating huge water hammer pressure that pushes the valve and the hammer to accelerate. Under the action of the water hammer effect, the water hammer pressure is dozens of times that of water pressure, giving the hammer a sufficiently large impact force, making it less likely for the drill bit to deviate during the drilling process. Simultaneously, the drive unit propels the impact drill bit to break through the rock formation. The combined action of the impact drill bit and the punch improves drilling efficiency in hard rock. Furthermore, during use, there is no need to adjust the water pressure in the water supply system; the impact drill automatically performs reciprocating impact actions.

[0008] Furthermore, the limiting sleeve includes a connecting cylinder and a limiting ring. The two ends of the connecting cylinder abut against the connecting head and the steps inside the connecting outer tube, respectively. The limiting ring is coaxially fixed on the inner ring of the connecting cylinder. The valve includes a valve body and a retaining ring. The retaining ring is coaxially fixed on the outer peripheral wall of the valve body. The valve body passes through the limiting ring, and the retaining ring is located on the side of the limiting ring closer to the connecting head.

[0009] By adopting the above technical solution, when the water flow pushes the valve to accelerate, the valve cannot continue to move forward when the retaining ring and the limiting ring come into contact. By setting the limiting sleeve, the valve and the hammer can be quickly separated, and the valve can be reset before the hammer. When the hammer is reset, the hammer will not interfere with the valve.

[0010] Furthermore, the guide sleeve includes a guide cylinder and a positioning ring. The positioning ring is fixed to one end of the guide sleeve near the connector. The valve body is slidably sleeved on the guide sleeve. The two ends of the positioning ring abut against the steps of the connector and the inner wall of the connecting cylinder, respectively. The retaining ring is located between the positioning ring and the limiting ring.

[0011] By adopting the above technical solution, the guide sleeve's guide cylinder is used to guide the movement of the valve, and the guide sleeve's positioning ring is used to determine the initial position of the valve. Whenever the valve body is reset, the valve body and the positioning ring abut against each other.

[0012] Furthermore, the inner wall of the connecting outer tube is provided with a plurality of first drainage holes, the anvil is provided with a plurality of second drainage holes, and the end of the impact drill bit away from the connecting outer tube is provided with a plurality of third drainage holes. The axes of the first drainage holes, the second drainage holes and the third drainage holes are all parallel to the axis of the impact hammer. The two ends of the first drainage hole are respectively connected to the throttling hole and the second drainage hole, and the end of the second drainage hole away from the first drainage hole is connected to the third drainage hole.

[0013] By adopting the above technical solution, when the impact drill is working, the water in the installation cavity will be squeezed when the valve and the hammer make impact movements, so that the water flow can be quickly discharged to the outside of the impact drill through the first drainage hole, the second drainage hole and the third drainage hole. This can reduce the impact of water flow resistance on the hammer during the impact movement, so that the hammer can maintain a sufficiently large impact force.

[0014] Furthermore, the reset spring assembly includes a telescopic spring and a spring sleeve. The anvil has a mounting groove at one end near the valve. The spring sleeve is slidably disposed in the mounting groove. The telescopic spring is disposed in the mounting groove. The two ends of the telescopic spring abut against the spring sleeve and the groove wall of the mounting groove, respectively.

[0015] By adopting the above technical solution, when the impact drill is not in operation, the spring sleeve extends out of the mounting groove under the action of the telescopic spring, pressing against the impact hammer. This keeps the impact hammer and the valve in a pressed state, preventing any movement of the components within the mounting cavity. When the impact hammer strikes the anvil, it presses the spring sleeve completely into the mounting groove, allowing the impact hammer to directly impact the end face of the anvil. This results in good force transmission, reduces energy loss during impact, and ensures the punch has a sufficiently large impact force. Furthermore, the return spring assembly assists the impact hammer in resetting during the reset process.

[0016] Furthermore, the mounting groove has multiple guide grooves on its wall, and the spring sleeve has multiple guide strips fixed on its outer wall, with the guide strips slidably disposed within the guide grooves.

[0017] By adopting the above technical solution, the spring sleeve and the anvil will not rotate relative to each other during the sliding process of the spring sleeve in the mounting groove, which can improve the stability of the spring sleeve's movement.

[0018] Furthermore, a breathing hole is provided on the outer wall of the anvil, and the breathing hole is connected to the mounting groove.

[0019] By adopting the above technical solution, the vent can maintain stable pressure inside the mounting groove, ensuring that the spring sleeve can slide stably within the mounting groove.

[0020] Furthermore, an impact-resistant ring is fixed to one end of the anvil near the hammer, and the impact-resistant ring has multiple flow grooves.

[0021] By adopting the above technical solution, the impact-resistant ring has higher strength than other parts of the anvil, ensuring that the impact hammer will not damage other components when impacting the impact-resistant ring. Furthermore, by opening the flow channel, the water flow can pass smoothly through the flow channel during the impact hammer's impact on the impact-resistant ring without affecting the hammer's reset.

[0022] Furthermore, the impact drill bit is a PDC drill bit.

[0023] By adopting the above technical solutions, PDC drill bits have high impact resistance and toughness. PDC drill bits, together with punches, can break through rock formations and improve the efficiency of hard rock drilling.

[0024] To better achieve the above-mentioned objectives, the present invention also provides a drilling method using a horizontally driven water hammer impact drill, comprising the following steps:

[0025] S1. The water supply system continuously supplies water towards the connector, and the drive device drives the impact drill to rotate.

[0026] S2. After the water flows into the connector, it enters the valve and drives the valve and the hammer to move rapidly. When the valve hits the limit sleeve, the valve and the hammer separate. Under the action of inertia, the hammer continues to drive the anvil to hit the punch and impact the rock formation. The PDC drill bit simultaneously scrapes and drills the rock formation.

[0027] S3. After the valve and the hammer separate, both ends of the valve are quickly filled with water. The force on the first water pressure bearing surface of the valve is less than the force on the second water pressure bearing surface. The valve automatically resets until the valve and the positioning ring come into contact.

[0028] S4. After the valve and the hammer separate, the water flow quickly fills both ends of the hammer. The force on the third water pressure bearing surface of the hammer is less than the force on the fourth water pressure bearing surface, and the hammer automatically resets.

[0029] S5. When the hammer and the valve come into contact again, the valve blocks the flow hole of the hammer again, and a water hammer effect occurs inside the valve. The huge water hammer pressure impacts the valve and the hammer, and the next impact cycle begins.

[0030] S6. The punch reciprocates to impact the rock formation, and works in conjunction with the PDC drill bit to continuously scrape and drill the rock formation until the drilling work is completed.

[0031] By adopting the above technical solution, under the influence of the water hammer effect, the water hammer pressure is dozens of times that of water pressure, giving the punch a sufficiently large impact force, making it less prone to deviation during the drilling process in mines. At the same time, the driving device drives the impact drill bit to break the rock strata. With the combined action of the punch and the impact drill bit, the drilling efficiency of hard rock can be improved.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. This invention, by setting up a valve and a hammer, enables the valve and hammer to automatically perform reciprocating impact actions. During operation, when the hammer resets, the valve blocks the flow hole of the hammer, causing a water hammer effect inside the valve. This generates huge water hammer pressure, which drives the valve and hammer to accelerate. Under the action of the water hammer effect, the water hammer pressure can reach tens of times the water pressure, giving the punch a sufficiently large impact force and making it less prone to deviation during the drilling process in mines.

[0034] 2. The first and second water pressure bearing surfaces formed on both sides of the valve in this invention are both used to contact the water flow. Since the area of ​​the first water pressure bearing surface is smaller than that of the second water pressure bearing surface, when the water flow fills both sides of the valve, the second water pressure bearing surface is subjected to a larger overall force, thus enabling the valve to automatically reset. Similarly, the reset principle of the hammer is the same as that of the valve. During operation, the hammer and valve can be automatically reset without the need to specifically control the water pressure of the water supply system.

[0035] 3. This invention, by incorporating a return spring assembly, ensures that, in the non-operating state, the elastic force of the return spring assembly keeps the hammer and valve in a pressed state, preventing movement of the components within the mounting cavity. During operation, the return spring assembly also assists the hammer in resetting. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0037] Figure 1 This is a cross-sectional view of a horizontally driven water hammer impact drill according to an embodiment of the present invention.

[0038] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0039] Figure 3 for Figure 1 Enlarged view of section B in the middle.

[0040] Figure 4 for Figure 1 Enlarged view of a section at point C.

[0041] Figure 5 This is a schematic diagram of the external structure of a horizontally driven water hammer impact drill according to an embodiment of the present invention.

[0042] Figure 6 This is a schematic diagram of the structure of the anvil in an embodiment of the present invention.

[0043] Figure 7 This is a schematic diagram of the spring sleeve according to an embodiment of the present invention.

[0044] The attached figures are labeled as follows: 1. Connector; 2. Connecting outer pipe; 3. Impact drill bit; 301. PDC drill bit; 4. Connecting hole; 5. Mounting cavity; 6. Impact slide; 7. Impact hole; 8. Guide sleeve; 81. Guide cylinder; 82. Positioning ring; 9. Valve; 91. Valve body; 92. Retaining ring; 10. First sealing ring; 11. Limiting sleeve; 111. Connecting cylinder; 112. Limiting ring; 12. Impact hammer; 13. Second sealing ring; 14. Third sealing ring; 15. Flow hole; 16. Drain hole; 17. First water... 18. Second water pressure bearing surface; 19. Third water pressure bearing surface; 20. Fourth water pressure bearing surface; 21. Throttling orifice; 22. Anvil; 221. Sealing part; 222. Sliding part; 23. Punch; 24. Return spring assembly; 241. Telescopic spring; 242. Spring sleeve; 25. Fourth sealing ring; 26. First drain hole; 27. Second drain hole; 28. Third drain hole; 29. ​​Mounting groove; 30. Guide groove; 31. Guide strip; 32. Breathing hole; 33. Impact-resistant ring; 34. Flow groove. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0046] See Figures 1 to 5The present invention provides a technical solution as follows: a horizontally driven water hammer impact drill, comprising a connector 1, a connecting outer tube 2 and an impact drill bit 3 connected in sequence. The connector 1 and the connecting outer tube 2 are detachably connected by bolts and nuts. The impact drill bit 3 is a PDC drill bit 301. The PDC drill bit 301 and the end of the connecting outer tube 2 away from the connector 1 are threadedly connected.

[0047] It should be noted that this percussion drill bit is mainly installed on drilling equipment. Connector 1 is connected to the drive unit on the drilling equipment, which drives the percussion drill bit to rotate, enabling the PDC drill bit 301 to drill into the rock formation. In addition, the water supply system on the drilling equipment is connected to connector 1 for water supply.

[0048] Reference Figure 1 and Figure 2 The connector 1 has a connecting hole 4, the connecting outer tube 2 forms an installation cavity 5, the PDC drill bit 301 has an impact slide 6, and the drill bit has an impact hole 7. The connecting hole 4, installation cavity 5, impact slide 6, and impact hole 7 are connected sequentially. It should be noted that the installation cavity 5 has multiple steps inside, mainly to facilitate the installation of other components in the installation cavity 5. Its specific structure will not be described in detail. A guide sleeve 8 is fixed in the installation cavity 5. A valve 9 is slidably fitted on the guide sleeve 8. A first sealing ring 10 is installed between the guide sleeve 8 and the valve 9. The first sealing ring 10 is snapped into the groove of the valve 9. A limiting sleeve 11 is installed in the installation cavity 5 to limit the movement of the valve 9. A punch 12 is slidably fitted on the valve 9. A second sealing ring 13 is provided between the valve 9 and the punch 12. The second sealing ring 13 is snapped into the groove on the inner wall of the punch 12.

[0049] Reference Figure 1 and Figure 3 A third sealing ring 14 is provided between the inner wall of the mounting cavity 5 and the punch 12, and the third sealing ring 14 is engaged in a groove in the inner wall of the mounting cavity 5. A flow hole 15 is provided at the end of the punch 12 away from the valve 9. When not in operation, the valve 9 blocks the end of the flow hole 15. Multiple vent holes 16 are arranged in a circumferential array on the peripheral wall of the valve 9, and the vent holes 16 are located between the second sealing ring 13 and the third sealing ring 14.

[0050] Reference Figure 1 and Figure 3The side of the valve 9 furthest from the impact hammer 12 forms a first water pressure bearing surface 17, and the side of the valve 9 closest to the impact hammer 12 forms a second water pressure bearing surface 18. The area of ​​the first water pressure bearing surface 17 is smaller than the area of ​​the second water pressure bearing surface 18. The side of the impact hammer 12 closest to the valve 9 forms a third water pressure bearing surface 19, and the side of the impact hammer 12 furthest from the valve 9 forms a fourth water pressure bearing surface 20. The area of ​​the third water pressure bearing surface 19 is smaller than the area of ​​the fourth water pressure bearing surface 20. It should be noted that the water pressure bearing surfaces described above refer to the effective force-bearing areas of the water flow on the valve 9 and the impact hammer 12 during the impact process.

[0051] Two symmetrically arranged throttling holes 21 are provided on the peripheral wall of the punch 12. The two ends of the throttling holes 21 are connected to the mounting cavity 5 and the flow hole 15, respectively. The diameter of the throttling holes 21 is less than 5mm. By setting the small-diameter throttling holes 21, it is possible to ensure that high pressure can be easily formed inside the punch 12, and also to ensure that the water inside the punch 12 can be discharged.

[0052] An anvil 22 is provided in the impact slide 6. The anvil 22 and the PDC drill bit 301 are connected by a key so that when the anvil 22 slides in the impact slide 6, the anvil 22 will not rotate relative to the impact slide 6.

[0053] Reference Figure 1 and Figure 5 The anvil 22 is provided with a punch 23 at the end away from the punch 12. The punch 23 passes through the impact hole 7. The anvil 22 is provided with a return spring assembly 24 at the end near the punch 23. When not in operation, the return spring assembly 24 abuts against the end of the punch 12 away from the valve 9, so that the punch 12 and the valve 9 can remain in a tight abutting state.

[0054] In actual operation, the drive unit drives the PDC drill bit 301 to drill into the rock formation. The water supply system continuously supplies water into the connecting sleeve 111, and the water pressure of the water supply system remains constant. Water enters the inside of the valve 9. Under the action of the first sealing ring 10 and the second sealing ring 13, the water flow cannot flow out of the valve 9. The internal pressure of the valve 9 rises, driving the valve 9 and the hammer 12 to make impact movements. When the valve 9 hits the limiting sleeve 11, the valve 9 stops moving. The hammer 12 continues to move under the action of inertia, driving the punch 23 to impact the rock formation, thus completing one impact. When the valve 9 and the hammer 12 separate, water flows out through the drain hole 16 and quickly fills both sides of the valve 9. At this time, the water flows onto the first water pressure receiving surface 17 and the second water pressure receiving surface 18. Since the area of ​​the second water pressure receiving surface 18 is larger than that of the first water pressure receiving surface 17, the valve 9 automatically resets. Similarly, the water flows through the throttling hole 21 and fills the chambers at both ends of the hammer 12. The water flows onto the third water pressure receiving surface 19 and the fourth water pressure receiving surface 20. The area of ​​the pressure-bearing surface 20 is larger than that of the third water pressure-bearing surface 19. When the valve 9 resets, the hammer 12 also resets. At the instant the valve 9 and the hammer 12 come into contact, the valve 9 blocks the flow hole 15 again. At this moment, a water hammer effect occurs inside the valve 9, generating a huge water hammer pressure that pushes the valve 9 and the hammer 12 to accelerate. Under the action of the water hammer effect, the water hammer pressure is tens of times that of water pressure, giving the punch 23 a sufficiently large impact force, making it less prone to deviation during the drilling process in the mine. The combined action of the punch 23 and the PDC drill bit 301 can improve the drilling efficiency of hard rock.

[0055] Reference Figure 1 , Figure 4 and Figure 6 The anvil 22 includes a sealing part 221 and a sliding part 222 that are coaxially fixed. The outer diameter of the sealing part 221 is smaller than the outer diameter of the sliding part 222. The sliding part 222 slides in the impact slide 6. The sealing part 221 is located close to the impact hammer 12. A fourth sealing ring 25 is installed between the sealing part 221 and the side wall of the mounting cavity 5 near the impact hammer 12. This makes it easier for the water flow in the mounting cavity 5 between the sealing part 221 and the impact hammer 12 to form high pressure, making it easier for the impact hammer 12 to reset.

[0056] Reference Figure 1 and Figure 2Specifically, the limiting sleeve 11 includes a connecting cylinder 111 and a limiting ring 112. Both ends of the connecting cylinder 111 abut against the steps inside the connecting head 1 and the connecting outer tube 2, respectively. The limiting ring 112 is coaxially fixed to the inner ring of the connecting cylinder 111. The guide sleeve 8 includes a guide cylinder 81 and a positioning ring 82. The positioning ring 82 is fixed to the end of the guide sleeve 8 near the connecting head 1. Both ends of the positioning ring 82 abut against the steps on the inner walls of the connecting head 1 and the connecting cylinder 111, respectively. Through the above installation method, the limiting sleeve 11 and the guide sleeve 8 are fixedly installed within the mounting cavity 5.

[0057] The valve 9 includes a valve body 91 and a retaining ring 92. The retaining ring 92 is coaxially fixed to one end of the outer peripheral wall of the valve body 91 near the connector 1. The valve body 91 is slidably fitted onto the guide sleeve 8, which guides the valve body 91. The valve body 91 passes through a limiting ring 112. The retaining ring 92 is located between the limiting ring 112 and the positioning ring 82. The inner diameter of the limiting ring 112 is smaller than the outer diameter of the retaining ring 92. Therefore, the limiting ring 112 and the positioning ring 82 limit the movement position of the valve 9.

[0058] It should be noted that in the initial position before each impact, the end faces of the valve 9 and the positioning ring 82 are in contact. When the valve 9 moves during impact, the retaining ring 92 and the limiting ring 112 come into contact; this is the maximum displacement position of the valve 9. By setting the retaining ring 92, the valve 9 and the hammer 12 can be quickly separated during the impact process, ensuring that the valve 9 resets before the hammer 12, and ensuring that the hammer 12 will not interfere with the valve 9 when it resets.

[0059] Reference Figure 1 , Figure 5 and Figure 6Multiple first drainage holes 26 arranged in a circular array are provided on the inner wall of the connecting outer tube 2. Multiple second drainage holes 27 arranged in a circular array are provided on the sliding part 222 of the anvil 22. The second drainage holes 27 penetrate both ends of the sliding part 222. Multiple third drainage holes 28 arranged in a circular array are provided on the end of the PDC drill bit 301 away from the connecting outer tube 2. The axes of the first drainage holes 26, the second drainage holes 27 and the third drainage holes 28 are all parallel to the axis of the hammer 12. The two ends of the first drainage holes 26 are connected to the throttling hole 21 and the second drainage hole 27 respectively. The end of the second drainage hole 27 away from the first drainage hole 26 is connected to the third drainage hole 28. When the impact drill is in operation, as the valve 9 and the hammer 12 impact, the water inside the hammer 12 is forced through the throttle hole 21 into the external mounting cavity 5. The water in the mounting cavity 5 continues to be compressed, allowing the water flow to be quickly discharged from the outside of the impact drill through the first drain hole 26, the second drain hole 27, and the third drain hole 28 in sequence. This reduces the impact of water flow resistance on the hammer 12 during the impact motion, allowing the hammer 12 to maintain a sufficiently large impact force. Since the axial direction of the first drain hole 26, the second drain hole 27, and the third drain hole 28 is consistent with the direction of the force on the water flow, the water can be discharged more smoothly.

[0060] Reference Figure 1 and Figure 4 The reset spring assembly 24 includes a telescopic spring 241 and a spring sleeve 242. An anvil 22 has a mounting groove 29 at its end near the valve 9. The spring sleeve 242 is slidably disposed within the mounting groove 29, and the telescopic spring 241 is also disposed within the mounting groove 29. Both ends of the telescopic spring 241 abut against the spring sleeve 242 and the groove wall of the mounting groove 29, respectively. In the non-operating state, under the action of the telescopic spring 241, the end of the spring sleeve 242 extends out of the mounting groove 29 and presses against the hammer 12, keeping the hammer 12 and the valve 9 in a pressed state, preventing movement of the components within the mounting cavity 5. When the hammer 12 impacts the anvil 22, it completely presses the spring sleeve 242 into the mounting groove 29, allowing the hammer 12 to directly impact the end face of the anvil 22. This results in good force transmission, reduces energy loss during impact, and ensures the punch 23 has a sufficiently large impact force. In addition, during the reset process of the hammer 12, the reset spring assembly 24 can also assist the hammer 12 in resetting.

[0061] Reference Figure 4 , Figure 6 and Figure 7The mounting groove 29 has multiple guide grooves 30 on its wall, and multiple guide strips 31 are fixed on the outer wall of the spring sleeve 242. The guide strips 31 and guide grooves 30 are fitted together, and the guide strips 31 slide within the guide grooves 30. This design ensures that the spring sleeve 242 and the anvil 22 will not rotate relative to each other during sliding within the mounting groove 29, thus improving the stability of the spring sleeve 242's movement. The anvil 22 has two symmetrically arranged vent holes 32 on its outer wall, which communicate with the mounting groove 29. The vent holes 32 prevent the formation of a sealed space inside the mounting groove 29, maintaining stable pressure within the mounting groove 29 and ensuring that the spring sleeve 242 can slide stably within the mounting groove 29.

[0062] Reference Figure 6 An anvil 22 is fixed with a shock-resistant ring 33 near the impact hammer 12. The shock-resistant ring 33, after heat treatment, has a higher structural strength than other parts. It can withstand the enormous impact force of the impact hammer 12, ensuring that the impact hammer 12 does not damage other components when impacting it. Flow grooves 34 are formed on both sides of the shock-resistant ring 33. During the impact of the impact hammer 12 on the shock-resistant ring 33, the water flow inside the impact hammer 12 can smoothly pass through the flow grooves 34, allowing the water flow to act on both ends of the impact hammer 12 without affecting its reset.

[0063] Reference Figures 1 to 7 The present invention also provides a drilling method for a horizontally driven water hammer impact drill, comprising the following steps:

[0064] S1. The water supply system continuously supplies water to connector 1, and the drive device drives the impact drill to rotate.

[0065] S2. After the water flows into the connector 1, it enters the valve 9 and drives the valve 9 and the hammer 12 to move rapidly. When the valve 9 hits the limit sleeve 11, the valve 9 and the hammer 12 separate. Under the action of inertia, the hammer 12 continues to drive the anvil 22 to hit the punch 23 to impact the rock formation. The PDC drill bit 301 simultaneously scrapes and drills the rock formation.

[0066] S3. After the valve 9 and the hammer 12 separate, the two ends of the valve 9 are quickly filled with water. The force on the first water pressure bearing surface 17 of the valve 9 is less than the force on the second water pressure bearing surface 18. The valve 9 automatically resets until the valve 9 and the positioning ring 82 come into contact.

[0067] After the separation of S4, valve 9 and hammer 12, the water flow quickly fills both ends of hammer 12. The force on the third water pressure bearing surface 19 of hammer 12 is less than the force on the fourth water pressure bearing surface 20, and hammer 12 automatically resets.

[0068] S5. When the hammer 12 and valve 9 come into contact again, valve 9 blocks the flow hole 15 of hammer 12 again. Water hammer effect occurs in valve 9. The huge water hammer pressure impacts valve 9 and hammer 12, and enters the next impact cycle.

[0069] S6 and punch 23 reciprocate to impact the rock formation, and together with PDC drill bit 301, continuously scrape and drill the rock formation until the drilling work is completed.

[0070] By adopting the above technical solution, under the effect of water hammer, the water hammer pressure is dozens of times that of water pressure, giving the punch 23 a sufficiently large impact force, making it less prone to deviation during the drilling process in the mine. At the same time, the drive device drives the PDC drill bit 301 to break the rock strata. With the combined action of the punch 23 and the PDC drill bit 301, the drilling efficiency of hard rock can be improved.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A horizontally oriented hydraulically driven water hammer impact drill, characterized in that, The assembly includes a connector (1), a connecting outer tube (2), and an impact drill bit (3) connected in sequence. The connector (1) has a connecting hole (4). The connecting outer tube (2) forms an installation cavity (5). The drill bit has an impact slide (6). The impact drill bit (3) has an impact hole (7). The connecting hole (4), the installation cavity (5), the impact slide (6), and the impact hole (7) are connected in sequence. A guide sleeve (8) is fixed in the installation cavity (5). A valve (9) is slidably fitted on the guide sleeve (8). A first sealing ring (1) is provided between the guide sleeve (8) and the valve (9). 0), a limiting sleeve (11) is provided in the mounting cavity (5) to limit the movement of the valve (9), a punch (12) is slidably sleeved on the valve (9), a second sealing ring (13) is provided between the valve (9) and the punch (12), a third sealing ring (14) is provided between the inner wall of the mounting cavity (5) and the punch (12), a flow hole (15) is provided at the end of the punch (12) away from the valve (9), the valve (9) blocks the end of the flow hole (15), a plurality of drain holes (16) are provided on the peripheral wall of the valve (9), and the drain holes (16) are located in the second Between the sealing ring (13) and the third sealing ring (14), the side of the valve (9) away from the hammer (12) forms a first water pressure bearing surface (17), and the side of the valve (9) close to the hammer (12) forms a second water pressure bearing surface (18). The area of ​​the first water pressure bearing surface (17) is smaller than the area of ​​the second water pressure bearing surface (18). The side of the hammer (12) close to the valve (9) forms a third water pressure bearing surface (19), and the side of the hammer (12) away from the valve (9) forms a fourth water pressure bearing surface (20). The area of ​​the third water pressure bearing surface (19) is smaller than the area of ​​the fourth water pressure bearing surface (20). The area of ​​the water pressure bearing surface (20) is such that a throttling hole (21) is provided on the peripheral wall of the hammer (12). The two ends of the throttling hole (21) are respectively connected to the mounting cavity (5) and the flow hole (15). An anvil (22) is slidably arranged in the impact slide (6). A punch (23) is provided at the end of the anvil (22) away from the hammer (12). The punch (23) penetrates the impact hole (7). A return spring assembly (24) is provided at the end of the anvil (22) near the punch (23). The return spring assembly (24) abuts against the end of the hammer (12) away from the valve (9).

2. The horizontally driven water hammer impact drill according to claim 1, characterized in that, The limiting sleeve (11) includes a connecting cylinder (111) and a limiting ring (112). The two ends of the connecting cylinder (111) abut against the steps inside the connecting head (1) and the connecting outer tube (2), respectively. The limiting ring (112) is coaxially fixed on the inner ring of the connecting cylinder (111). The valve (9) includes a valve body (91) and a retaining ring (92). The retaining ring (92) is coaxially fixed on the outer peripheral wall of the valve body (91). The valve body (91) passes through the limiting ring (112). The retaining ring (92) is located on the side of the limiting ring (112) close to the connecting head (1).

3. A horizontally driven water hammer impact drill according to claim 2, characterized in that, The guide sleeve (8) includes a guide cylinder (81) and a positioning ring (82). The positioning ring (82) is fixed to one end of the guide sleeve (8) near the connector (1). The valve body (91) is slidably sleeved on the guide sleeve (8). The two ends of the positioning ring (82) abut against the steps of the inner walls of the connector (1) and the connector cylinder (111), respectively. The retaining ring (92) is located between the positioning ring (82) and the limiting ring (112).

4. A horizontally driven water hammer impact drill according to claim 1, characterized in that, The inner wall of the connecting outer tube (2) is provided with a plurality of first drainage holes (26), the anvil (22) is provided with a plurality of second drainage holes (27), and the impact drill bit (3) is provided with a plurality of third drainage holes (28) at one end away from the connecting outer tube (2). The axes of the first drainage holes (26), the second drainage holes (27) and the third drainage holes (28) are all parallel to the axis of the hammer (12). The two ends of the first drainage hole (26) are respectively connected to the throttling hole (21) and the second drainage hole (27). The end of the second drainage hole (27) away from the first drainage hole (26) is connected to the third drainage hole (28).

5. A horizontally driven water hammer impact drill according to claim 1, characterized in that, The reset spring assembly (24) includes a telescopic spring (241) and a spring sleeve (242). The anvil (22) has an installation groove (29) at one end near the valve (9). The spring sleeve (242) is slidably disposed in the installation groove (29). The telescopic spring (241) is disposed in the installation groove (29). The two ends of the telescopic spring (241) abut against the spring sleeve (242) and the groove wall of the installation groove (29), respectively.

6. A horizontally driven water hammer impact drill according to claim 5, characterized in that, The mounting groove (29) has multiple guide grooves (30) on its wall, and multiple guide strips (31) are fixed on the outer wall of the spring sleeve (242). The guide strips (31) are slidably disposed in the guide grooves (30).

7. A horizontally driven water hammer impact drill according to claim 5, characterized in that, The anvil (22) has a breathing hole (32) on its outer wall, and the breathing hole (32) is connected to the mounting groove (29).

8. A horizontally driven water hammer impact drill according to claim 5, characterized in that, The anvil (22) is fixed with a shock-resistant ring (33) at one end near the hammer (12), and the shock-resistant ring (33) has multiple flow grooves (34).

9. A horizontally driven water hammer impact drill according to claim 3, characterized in that, The impact drill bit (3) is a PDC drill bit (301).

10. A drilling method for a horizontally driven water hammer impact drill bit, applicable to the horizontally driven water hammer impact drill bit as described in claim 9, characterized in that, Includes the following steps: S1. The water supply system continuously supplies water to the connector (1), and the drive device drives the impact drill to rotate. S2. After the water flows into the connector (1), the water flows into the valve (9), which drives the valve (9) and the hammer (12) to move rapidly. When the valve (9) hits the limit sleeve (11), the valve (9) and the hammer (12) separate. Under the action of inertia, the hammer (12) continues to drive the anvil (22) to hit the punch (23) to impact the rock formation. The PDC drill bit (301) simultaneously scrapes and drills the rock formation. S3. When the valve (9) and the hammer (12) are separated, the two ends of the valve (9) are quickly filled with water. The force on the first water pressure bearing surface (17) of the valve (9) is less than the force on the second water pressure bearing surface (18). The valve (9) automatically resets until the valve (9) and the positioning ring (82) come into contact. S4. After the valve (9) and the hammer (12) are separated, the water flow quickly fills both ends of the hammer (12). The force on the third water pressure bearing surface (19) of the hammer (12) is less than the force on the fourth water pressure bearing surface (20), and the hammer (12) automatically resets. S5. When the hammer (12) and valve (9) come into contact again, the valve (9) blocks the flow hole (15) of the hammer (12) again. A water hammer effect occurs in the valve (9). The huge water hammer pressure impacts the valve (9) and the hammer (12), and enters the next impact cycle. S6, the punch (23) reciprocates to impact the rock formation, and works with the PDC drill bit (301) to continuously scrape and drill the rock formation until the drilling work is completed.

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