A horizontal directional drilling machine

Abstract

The application discloses a horizontal directional drilling machine, and relates to the technical field of drilling equipment, which comprises a machine body, a drill rod, a connecting rod, a drill bit, a filter screen, a water collecting groove formed in the drill bit, and a water collecting groove opening provided with the filter screen. The outer periphery of the connecting rod is provided with a plurality of water injection openings, the water injection openings are obliquely arranged away from the drill bit, the connecting rod is formed with a transmission groove, a plurality of pressurizing grooves are formed in the connecting rod at intervals, a first connecting hole is formed in the connecting rod, a second connecting hole is formed in the connecting rod and is connected with the pressurizing grooves and the transmission groove, the first connecting hole and the second connecting hole are away from each other, a pressurizing block is arranged, when the pressurizing block slides through the first connecting hole and towards the second connecting hole, the pressurizing block pressurizes water flow in the pressurizing grooves, an elastic power element is arranged to drive the pressurizing block to slide away from the second connecting hole to the side of the first connecting hole, and a control assembly is arranged, when water flow is sprayed from the water injection openings, the control assembly controls the pressurizing block to cyclically slide in the pressurizing grooves and pressurize water flow in the pressurizing grooves. The application can improve drilling precision.

Description

Technical Field

[0001] This application relates to the technical field of drilling equipment, and in particular to a horizontal directional drilling rig. Background Technology

[0002] Horizontal directional drilling is a construction method that uses a horizontal directional drilling rig to lay various underground utilities (pipelines, cables, etc.) without excavating the ground or damaging the terrain.

[0003] A typical horizontal directional drilling rig mainly consists of a rig body and drilling tools. The drilling tools comprise a support rod, a drill head, and a drill string. The drill string has a multi-segment structure, with adjacent segments connected by threads. The drill head is fixed to the support rod, forming an eccentric drill structure. The support rod is attached to the end of one of the drill string segments. The drill string, support rod, and drill head each have interconnected water flow holes. The rig body ejects high-pressure water from the drill head through these holes to scour the soil.

[0004] During drilling, the drill string drives the drill string to rotate and advance axially, propelling the drill bit into the ground. Simultaneously, the drill bit emits a high-pressure water jet to flush the soil, increasing drilling speed. The water jet also carries soil and broken rocks out of the borehole. As the drill string drives one section of the drill string into the ground, it connects to the next section, and the drill string continues to drive the drill string downwards, propelling the drill bit forward. When the drill bit needs to turn, the direction of the drill bit's tilt is controlled, and the drill string is stopped rotating. The drill bit will then advance in the direction of the tilt. To stop turning and move straight, the drill string is used to drive the drill string to rotate again.

[0005] During drilling, the broken rocks from the drill bit are carried out of the hole by the water flow. However, when the drill bit turns or the drill head swings towards the sidewall of the hole, if the outer circumference of the bearing rod adjacent to the drill head comes into contact with the passing rocks, the forward direction of the drill head may deviate, affecting the drilling accuracy. Summary of the Invention

[0006] To improve drilling accuracy, this application provides a horizontal directional drilling rig.

[0007] This application provides a horizontal directional drilling rig, which adopts the following technical solution: A horizontal directional drilling rig, including Organism; The drill pipe has a multi-segment structure, with adjacent drill pipes connected by threads; A connecting rod is provided at the end of the drill rod, and the central axis of the connecting rod is at an angle to the central axis of the drill rod; A drill bit is disposed at the end of the connecting rod away from the drill rod, and the drill bit has multiple water jets. The drill rod and the connecting rod are respectively formed with interconnected water inlets, the water inlets are connected to the water nozzle, the machine body transmits water flow to the water inlets, and the machine body drives the drill rod to rotate and move axially; A filter screen is provided at the opening of the water collection tank on the side of the drill bit away from the connecting rod. The connecting rod has multiple water injection ports evenly spaced along its outer periphery. The water injection ports are located near the drill bit and are inclined away from the drill bit. A transmission groove is formed circumferentially inside the connecting rod, and the transmission groove is connected to the water jet nozzle. The connecting rod has a plurality of circumferentially extending pressurizing grooves spaced apart inside. The connecting rod has a first connecting hole that connects the pressurizing grooves and the water collection tank. The connecting rod also has a second connecting hole that connects the pressurizing grooves and the transmission tank. The openings of the first connecting hole and the second connecting hole are far apart from each other. The pressurizing block slides within the pressurizing groove. When the pressurizing block passes through the first connecting hole and slides toward the second connecting hole, the pressurizing block pressurizes the water flow within the pressurizing groove. An elastic dynamic component drives the pressure block to slide toward the side of the first connecting hole away from the second connecting hole; A control component is provided on the connecting rod. When water is sprayed out from the spray nozzle, the control component controls the pressurizing block to slide cyclically in the pressurizing tank to pressurize the water flow in the pressurizing tank.

[0008] By adopting the above technical solution, during drilling, the water jet from the nozzle flows out of the hole. At this time, part of the water flows through the filter screen and enters the water collection tank, and then enters the pressurization tank through the first connecting hole. Simultaneously, as the water flows from the water inlet to the nozzle, the control component drives the pressurization block to slide in the pressurization tank, pushing the water in the pressurization tank towards the second connecting hole. After being squeezed, the water pressure increases. At this time, the water flows through the second connecting hole and enters the transmission tank, and then sprays out through the nozzle. This creates a water curtain on the outer periphery of the connecting rod that moves away from the drill bit, reducing the possibility of rocks colliding with the connecting rod and causing drill bit deviation, which could affect the drilling direction and improve drilling accuracy.

[0009] Optionally, the control assembly includes a power blade, a power shaft, a control ring, a control gear, a control rack, a toggle block, a control block, a transmission shaft, a transmission helical gear, and a power helical gear. The connecting rod has a control groove that communicates with the water nozzle. The power shaft is rotatably connected to the connecting rod and located in the control groove. The power blades are circumferentially spaced on the outer periphery of the power shaft and protrude into the control groove. The control ring is rotatably connected to the connecting rod, the control ring is located between the pressurization tank and the water collection tank, and the control rack is disposed on the outer periphery of the control ring; The drive shaft is rotatably connected to the connecting rod, and the control gear is disposed on the outer periphery of the drive shaft, meshing with the control rack; The transmission helical gear is disposed on the outer periphery of the transmission shaft, and the power helical gear is disposed on the outer periphery of the power shaft. The power helical gear meshes with the transmission helical gear. The control ring has a sliding hole extending axially, the control block slides in the sliding hole and protrudes into the sliding hole in a direction away from the water collection tank, there are multiple control blocks and they are spaced apart circumferentially, and the connecting rod has a moving groove formed circumferentially for the control block to slide in. The actuating block is disposed on the side wall of the pressurizing block near the water collection tank. The connecting rod forms an actuating hole for the actuating block to slide. The actuating hole connects the moving groove and the pressurizing groove. The actuating block passes through the actuating hole and protrudes into the moving groove. When the control ring rotates circumferentially, the control block abuts against the actuating block and pushes the pressure block to slide. The connecting rod has a receiving groove corresponding to the second connecting hole. The actuating block is inclined to form a control surface for the control block to slide. When the control block is aligned with the receiving groove, the actuating block pushes the control block to slide into the sliding hole. At this time, the control block separates from the actuating block. The connecting rod is inclined to form a pushing surface located in the receiving groove. When the control block slides on the pushing surface, the control block slides out of the sliding hole.

[0010] By adopting the above technical solution, when the water flow is transmitted from the water inlet to the nozzle, it impacts the power blades, thereby driving the power shaft to rotate. At this time, the power helical gear and the transmission helical gear transmit power, and the control gear drives the control ring to rotate through the control rack, so that the control block drives the pressure block to slide by pushing the actuating block, which is beneficial to push the water flow in the pressure tank towards the second connecting hole.

[0011] Optionally, two pressure grooves are symmetrically arranged, and the actuating block includes a first actuating block and a second actuating block, wherein the first actuating block and the second actuating block are radially offset. The control block includes a first control block and a second control block. The first control block corresponds to the first toggle block and is evenly spaced along the circumference. The second control block corresponds to the second toggle block and is evenly spaced along the circumference. The first control block and the second control block are staggered along the circumference.

[0012] By adopting the above technical solution, the pressurizing block can slide toward the second connecting hole one after another, and the water flow in the two pressurizing tanks can be transmitted to the transmission tank one after another, which is conducive to the continuous spraying of water jets from the nozzle.

[0013] Optionally, the control block has arc-shaped structures formed at its opposite ends.

[0014] By adopting the above technical solution, the friction encountered when the control block slides is reduced.

[0015] Optionally, the connecting rod has a mounting hole that connects the second connecting hole and the transmission groove, and the diameter of the mounting hole is larger than the diameter of the second connecting hole; The connecting rod is hinged to a sealing plate located in the mounting hole, and the connecting rod is provided with an elastic driving member that drives the sealing plate to seal the opening of the second connecting hole; When water flows from the second connection hole to the transmission channel, the sealing plate opens the second connection hole.

[0016] By adopting the above technical solution, when water flows from one pressurizing tank into the transmission tank, the sealing plate blocks the second connection hole between the other pressurizing tank and the transmission tank, reducing the possibility of water flowing into the other pressurizing tank.

[0017] Optionally, the elastic driving element is a driving torsion spring; The connecting rod is rotatably connected to a hinge shaft located in the mounting hole, and the sealing plate is fixed to the hinge shaft; The driving torsion spring is sleeved on the hinge shaft, with one end of the driving torsion spring abutting against the side of the sealing plate near the transmission groove, and the other end abutting against the wall of the mounting hole.

[0018] By adopting the above technical solution, the torsion spring drives the sealing plate to flip, which facilitates the sealing plate to seal the second connecting hole opening.

[0019] Optionally, a sealing ring is embedded in the outer peripheral sidewall of the pressure block, and the sealing ring slides in contact with the wall of the pressure groove.

[0020] By adopting the above technical solution, the distance between the pressurizing block and the pressurizing tank wall is reduced, thereby reducing the water flow from seeping into the gap between the pressurizing block and the pressurizing tank under pressure during pressurization.

[0021] Optionally, the elastic dynamic component is a dynamic spring; The pressure block has a limiting block that slides on the connecting rod on the side facing away from the water collection tank, and the connecting rod has a limiting groove for the limiting block to slide. The power spring is installed in the limiting groove, with one end of the power spring abutting against the limiting block near the second connecting hole, and the other end abutting against the wall of the limiting groove.

[0022] By adopting the above technical solution, the power spring is released elastically, pushing the pressure block to move away from the second connecting hole.

[0023] In summary, this application includes at least one of the following beneficial effects: 1. During drilling, the water jet from the nozzle is collected, pressurized, and then transmitted to the transmission tank. The water jet then sprays out from the nozzle to form a water curtain, which pushes the stones away from the side wall of the connecting rod as they pass by, reducing the contact between the stones and the side wall of the connecting rod and thus reducing the possibility of drill bit deviation. This helps to improve drilling accuracy. 2. The pressurizing block slides toward the second connecting hole one after another, so that the water in the transmission tank can be continuously transmitted toward the jet nozzle. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure when the drill bit and the connecting rod are connected in an embodiment of this application; Figure 3 This is a schematic diagram of the internal cross-section of the drill bit and the connecting rod in an embodiment of this application; Figure 4 yes Figure 3 Enlarged schematic diagram of part A; Figure 5 This is a schematic diagram of the internal cross-section of the connecting rod in an embodiment of this application; Figure 6 This is a schematic cross-sectional view of the pressure block before pressure is applied in an embodiment of this application; Figure 7 This is a cross-sectional schematic diagram of the control gear and control rack in an embodiment of this application; Figure 8 This is a cross-sectional schematic diagram of the power axial drive shaft transmitting power in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of the pressure block and control ring in the embodiments of this application; Figure 10 This is a cross-sectional schematic diagram of the control block sliding out of the receiving groove in an embodiment of this application.

[0025] Reference numerals: 1. Body; 2. Drill rod; 3. Connecting rod; 31. Injector; 32. Transmission groove; 33. Pressurization groove; 331. Restriction groove; 332. Slide groove; 34. First connecting hole; 35. Second connecting hole; 351. Mounting hole; 352. Sealing plate; 353. Drive torsion spring; 354. Hinge shaft; 36. Control groove; 361. Gear groove; 37. Moving groove; 38. Actuating hole; 39. Receiving groove; 391. Pushing surface; 4. Drill bit; 41. Injector; 42. Collector 43. Water tank; 5. Filter screen; 6. Water inlet; 7. Pressurizing block; 8. Sealing ring; 9. Limiting block; 10. Power spring; 11. Power blade; 2. Power shaft; 22. Control ring; 3. Sliding hole; 43. Control gear; 54. Control rack; 65. First actuating block; 751. Second actuating block; 752. Control surface; 76. Control block; 761. First control block; 762. Second control block; 77. Drive shaft; 78. Drive helical gear; 79. Power helical gear. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0027] This application discloses a horizontal directional drilling rig. See also... Figure 1 The horizontal directional drilling rig includes a body 1, a drill rod 2, a connecting rod 3, and a drill bit 4.

[0028] See Figure 1 and Figure 2 The drill rod 2 has a multi-segment structure, and adjacent drill rods 2 are connected by threads. During drilling, one segment of drill rod 2 is first installed on the machine body 1. The connecting rod 3 is fixed to the ground-facing side of the drill rod 2 first installed on the machine body 1 by a threaded connection. There is an angle between the central axis of the drill rod 2 and the central axis of the connecting rod 3. The drill bit 4 is threadedly connected to the connecting rod 3. At this time, the drill bit 4 and the drill rod 2 form an eccentric drill structure. Multiple water nozzles 41 are evenly spaced circumferentially on the side of the drill bit 4 facing away from the connecting rod 3. Water inlets 5 are formed inside the connecting rod 3 and the drill rod 2, and the water inlets 5 are connected to the water nozzles 41.

[0029] During drilling, the machine body 1 drives the drill rod 2 to rotate and push it towards the ground. Simultaneously, the machine body 1 pressurizes the water flow and transmits it to the water inlet 5, causing the water to form a high-pressure water jet that is ejected from the nozzle 41. At this time, the drill bit 4 drills into the soil, and the high-pressure water jet, in conjunction with flushing the soil, increases the drilling speed while flushing out soil and rocks from the drilled hole. When one section of drill rod 2 is about to be pushed off the machine body 1, the next section of drill rod 2 is installed onto the machine body 1. Adjacent drill rods 2 are threaded together, and the thread tightening direction is the same as the direction in which the machine body 1 drives the drill rod 2 to rotate. The length of drill rod 2 is then continuously extended using the same steps. If it is necessary to change the direction of the drilled hole during the drilling process, simply stop driving the drill rod 2 to rotate and control the swing direction of the drill bit 4. The drill rod 2 will then advance along the swing direction of the drill bit 4, and the soil encountered during this advance is flushed out of the hole by the high-pressure water flow.

[0030] See Figure 2 and Figure 3 A water collection trough 42 is formed on the side of the drill bit 4 away from the connecting rod 3. The horizontal directional drill also includes a filter screen 43, which is made of fine iron wire. The filter screen 43 is fixed to the drill bit 4 and covers the opening of the water collection trough 42. During drilling, the high-pressure water jet from the nozzle 41 washes the soil and flows out of the hole under high pressure. At this time, some of the water jet impacts the drill bit 4, and after passing through the filter screen 43 to filter out stones in the water jet, it enters the water collection trough 42.

[0031] See Figure 3 and Figure 4 A transmission groove 32 is formed circumferentially inside the connecting rod 3. The transmission groove 32 is offset from the water inlet 5 and is located close to the drill bit 4. A water jet nozzle 31 is formed on the outer periphery of the connecting rod 3. The water jet nozzle 31 is connected to the transmission groove 32 and extends obliquely away from the drill bit 4 to the outside of the connecting rod 3.

[0032] See Figure 4 and Figure 5 Two pressurizing grooves 33 are symmetrically formed within the connecting rod 3. The pressurizing grooves 33 extend circumferentially and are located between the transmission groove 32 and the water collection groove 42. The connecting rod 3 has a first connecting hole 34 and a second connecting hole 35. The first connecting hole 34 connects the pressurizing groove 33 and the transmission groove 32, and the second connecting hole 35 connects the pressurizing groove 33 and the water collection groove 42. The first connecting hole 34 and the second connecting hole 35 are far apart from each other and are located near both ends of the pressurizing groove 33. The openings of the first connecting hole 34 and the second connecting hole 35 are located on opposite sides of the groove wall of the pressurizing groove 33.

[0033] See Figure 5 and Figure 6The horizontal directional drill includes a pressure block 6 and an elastic power component. The pressure block 6 corresponds one-to-one with the pressure groove 33 and slides circumferentially within the pressure groove 33. When the pressure block 6 abuts against the side of the pressure groove 33 away from the second connecting hole 35, the first connecting hole 34 is located between the pressure block 6 and the second connecting hole 35. The outer peripheral side of the pressure block 6 slides in contact with the groove wall of the pressure groove 33, and a sealing ring 61 is also embedded and fixed on the outer peripheral side of the pressure block 6. The sealing ring 61 is located at the end near the first connecting hole 34. The sealing ring 61 slides in contact with the groove wall of the pressure groove 33, reducing the gap between the pressure block 6 and the groove wall of the pressure groove 33, and reducing the possibility of water seeping into the gap between the pressure block 6 and the groove wall of the pressure groove 33 under pressure during pressurization.

[0034] To reduce the water flow when the pressurizing block 6 moves to the vicinity of the second connecting hole 35, the water flows through the first connecting hole 34 into the pressurizing groove 33 on the side of the pressurizing block 6 away from the second connecting hole 35. The distance between the first connecting hole 34 and the second connecting hole 35 is less than the length of the pressurizing block 6. Therefore, when the pressurizing block 6 moves to abut against the groove wall of the pressurizing groove 33 on the side away from the second connecting hole 35, there is a gap between the first connecting hole 34 and the pressurizing block 6.

[0035] A limiting block 62 is fixedly connected to the side wall of the pressurizing block 6 away from the water collection tank 42. A limiting groove 331, which is formed circumferentially inside the connecting rod 3 and communicates with the pressurizing tank 33, is formed. The limiting block 62 slides in the limiting groove 331. The elastic power component is a power spring 63, which is installed in the limiting groove 331. One end of the power spring 63 abuts against the end of the limiting block 62 near the second connecting hole 35, and the other end abuts against the groove wall of the limiting groove 331.

[0036] Initially, the power spring 63 is released elastically, pushing the limiting block 62 to slide to abut against the wall of the limiting groove 331. At this time, the pressure block 6 abuts against the side of the pressure groove 33 away from the second connecting hole 35. The first connecting hole 34 is located between the pressure block 6 and the second connecting hole 35. At this time, the water in the water collection tank 42 enters the pressure groove 33 through the first connecting hole 34. When the pressure block 6 slides towards the second connecting hole 35 and passes the first connecting hole 34, the water in the pressure groove 33 is squeezed by the pressure block 6 and enters the second connecting hole 35; then it flows through the transmission groove 32 to the water jet 31 (the water jet 31 is located in...). Figure 4 After the water flows out (as indicated by the bid), a water column is formed around the connecting rod 3, spraying outwards in a direction away from the drill bit 4. The water columns work together to form a water curtain. When a rock moving out of the hole passes the connecting rod 3, the rock is washed by the water column, reducing the possibility of the drill bit 4 deviating due to contact between the outer periphery of the connecting rod 3 and the rock. At the same time, the water column sprays out from the water jet 31 and forms a forward thrust on the drill bit 4, further increasing the drilling speed of the drill bit 4.

[0037] The horizontal directional drill also includes a control component, which is located on the connecting rod 3. When water flows through the water inlet 5 and from the nozzle 41 (the nozzle 41 is in...) Figure 2 When the nozzle is ejected (as indicated by the winning bid), the control component controls the pressure block 6 to slide towards the second connecting hole 35.

[0038] See Figure 7 and Figure 8 The control assembly includes a power blade 7, a power shaft 71, a control ring 72, a control gear 73, a control rack 74, a toggle block, a control block 76, a transmission shaft 77, a transmission helical gear 78, and a power helical gear 79. A control groove 36 is formed inside the connecting rod 3. The control groove 36 corresponds one-to-one with the water inlet 5 and is connected to it. The control groove 36 is located in the pressurizing groove 33 (the pressurizing groove 33 is in Figure 6 The power shaft 71 corresponds one-to-one with the control groove 36 and is rotatably connected to the connecting rod 3. The power shaft 71 is located inside the control groove 36. There are multiple power blades 7, which are evenly spaced circumferentially. The power blades 7 extend and protrude into the water inlet 5. When water flows through the water inlet 5 and towards the spray nozzle 41 (the spray nozzle 41 is located between the water inlet 5 and the water collection tank 42), the power shaft 71 corresponds one-to-one with the control groove 36 and is rotatably connected to the connecting rod 3. The power shaft 71 is located inside the control groove 36. There are multiple power blades 7, which are evenly spaced circumferentially. The power blades 7 extend and protrude into the water inlet 5. When water flows through the water inlet 5 and towards the spray nozzle 41 (the spray nozzle 41 is located inside the water inlet Figure 2 When the water flows, it impacts the propeller blades 7, at which point the propeller shaft 71 begins to rotate.

[0039] A circumferentially extending groove 332 is formed inside the connecting rod 3, and the groove 332 is located in the pressure groove 33 (the pressure groove 33 is in Figure 6 (Winning bid) and water collection tank 42 (water collection tank 42 in) Figure 5 The control groove 36 is located on the side of the slide groove 332 away from the central axis, and the control groove 36 is connected to the slide groove 332. The control ring 72 is a circular ring structure and slides in the slide groove 332. The end face of the control ring 72 slides in contact with the groove wall of the slide groove 332. The control rack 74 is a ring structure and is fixed on the outer periphery of the control ring 72.

[0040] A gear groove 361 is formed within the connecting rod 3. A power column protrudes into the gear groove 361, and a power helical gear 79 is fixed to the outer periphery of the power shaft 71 and located within the gear groove 361. A transmission shaft 77 is rotatably connected to the connecting rod 3. Both ends of the transmission shaft 77 extend into the gear groove 361 and the sliding groove 332, respectively. A transmission helical gear 78 is fixed to the outer periphery of the transmission shaft 77 and located within the gear groove 361, and meshes with the power helical gear 79. When the power shaft 71 rotates, the power helical gear 79 drives the transmission shaft 77 to rotate via the transmission helical gear 78. A control gear 73 corresponds one-to-one with the transmission shaft 77 and is fixed to the outer periphery of the power shaft 71. The control gear 73 rotates on the connecting rod 3 and meshes with the control rack 74. When the transmission shaft 77 rotates, the control gear 73 drives the control ring 72 to rotate via the control rack 74.

[0041] See Figure 9 and Figure 10 The actuating block includes a first actuating block 75 and a second actuating block 751. The first actuating block 75 and the second actuating block 751 are respectively fixed to the sidewalls of the two pressure blocks 6 near the drill bit 4. The first actuating block 75 and the second actuating block 751 are radially offset, meaning the distance from the first actuating block 75 to the central axis of the connecting rod 3 is not equal to the distance from the second actuating block 751 to the central axis of the connecting rod 3. The connecting rod 3 has an actuating hole 38 communicating with the pressure groove 33 (the actuating hole 38 is located in...). Figure 5 (as indicated by the mark), the first toggle block 75 and the second toggle block 751 slide within the toggle hole 38 respectively.

[0042] The control block 76 includes a first control block 761 and a second control block 762. Multiple first control blocks 761 are arranged circumferentially within the control ring 72, and each first control block 761 corresponds to a first actuating block 75. Multiple second control blocks 762 are also arranged circumferentially within the control ring 72, and each second control block 762 corresponds to a second actuating block 751. The first control blocks 761 and second control blocks 762 are staggered circumferentially while remaining adjacent to each other. The connecting rod 3 has grooves 332 and actuating holes 38 respectively (the actuating holes 38 are located in...). Figure 5 The first control block 761 and the second control block 762 slide within the movable slot 37 (marked out).

[0043] When the control ring 72 rotates, the first control block 761 first abuts against the first actuating block 75. At this time, the first control block 761 drives the pressure block 6 toward the second connecting hole 35 through the first actuating block 75 (the second connecting hole 35 is in...). Figure 5 The second control block 762 slides in the direction indicated by the second control block 762; then the second control block 762 abuts against the second toggle block 751, so that the second control block 762 drives the corresponding pressure block 6 to slide in the direction of the second connecting hole 35 through the second toggle block 751.

[0044] The control ring 72 has a sliding hole 721 communicating with the moving groove 37. The sliding hole 721 includes a first sliding hole and a second sliding hole. The first control block 761 slides in the first sliding hole, and the second control block 762 slides in the second sliding hole. In the initial state, the first control block 761 protrudes from the first sliding hole into the moving groove 37, and the second control block 762 protrudes from the second sliding hole into the moving groove 37.

[0045] A receiving groove 39 is formed inside the connecting rod 3. The receiving groove 39 is located on the side of the slide groove 332 away from the pressure groove 33 and is connected to it. The receiving groove 39 is connected to the second connecting hole 35 (the second connecting hole 35 is in Figure 5(The marked items correspond one-to-one.) When the pressure block 6 moves to the vicinity of the second connecting hole 35, the control ring 72 moves until the control block 76 is aligned with the receiving groove 39. The toggle block is tilted to form a control surface 752, and the control block 76 slides on the control surface 752.

[0046] When the first control block 761 and the second control block 762 slide to align with the receiving groove 39, the first actuating block 75 pushes the first control block 761 into the receiving groove 39 via the control surface 752, and the second actuating block 751 pushes the second control block 762 into the receiving groove 39 via the control surface 752. At this time, the first actuating block 75 separates from the second control block 762, and the second actuating block 751 separates from the second control block 762. The pressure block 6 loses its thrust towards the second connecting hole 35, and the movement... The force spring 63 is released elastically, and the pressure block 6 is pushed away from the second connecting hole 35 by the limiting block 62, so that the pressure block 6 slides back to the position before pressurization; and since the first control block 761 and the second control block 762 are circumferentially misaligned, when the pressure block 6 where the first control block 761 is located is away from the second connecting hole 35, the pressure block 6 where the second control block 762 is located is close to the second connecting hole 35, so that the interval between the water flow in the two pressurization tanks 33 being pressurized and input into the transmission tank 32 is shorter.

[0047] The connecting rod 3 is inclined to form a pushing surface 391, which is located on the wall of the receiving groove 39. After the first control block 761 and the second control block 762 enter the receiving groove 39, they move towards the pushing surface 391. When sliding on the pushing surface 391, the first control block 761 and the second control block 762 are slid in the direction of the pushing groove and the pressurizing groove 33, until the first control block 761 and the second control block 762 slide out of the receiving groove 39, so that the first control block 761 and the second control block 762 can protrude into the moving groove 37 again. At the same time, in order to reduce the friction generated when the first control block 761 and the second control block 762 slide, the first control block 761 and the second control block 762 are respectively provided with arc surface structures at the two ends facing closer to and farther away from the water collection tank 42.

[0048] The connecting rod 3 has a mounting hole 351, which corresponds one-to-one with the second connecting hole 35. The mounting hole 351 is located at the opening of the second connecting hole 35 away from the pressure groove 33. The mounting hole 351 connects the second connecting hole 35 and the transmission groove 32 respectively, and the diameter of the mounting hole 351 is larger than the diameter of the second connecting hole 35.

[0049] See Figure 4The connecting rod 3 is rotatably connected to a hinge shaft 354, which corresponds one-to-one with and is located within the mounting hole 351. The connecting rod 3 is equipped with a sealing plate 352, which corresponds one-to-one with and is fixed to the hinge shaft 354. The size of the sealing plate 352 is adapted to the opening size of the second connecting hole 35, so that when the sealing plate 352 is flipped to abut against the groove wall of the mounting hole 351 away from the opening, the sealing plate 352 blocks the opening of the second connecting hole 35. The connecting rod 3 is equipped with an elastic driving element, which is a driving torsion spring 353. The driving torsion spring 353 corresponds one-to-one with the hinge shaft 354, and is sleeved on the outer periphery of the hinge shaft 354. One end of the driving torsion spring 353 abuts against the sealing plate 352, and the other end abuts against the wall of the mounting hole 351. When the drive torsion spring 353 is released elastically, the drive sealing plate 352 is rotated toward the opening of the second connecting hole 35, so that the sealing plate 352 blocks the opening of the second connecting hole 35.

[0050] See Figure 4 and Figure 6 Initially, the sealing plate 352 blocks the opening of the second connecting hole 35. When one of the pressurizing blocks 6 slides towards the second connecting hole 35, the water in the pressurizing groove 33 flows into the second connecting hole 35. At this time, after being pressurized by the pressurizing block 6, the water pushes the sealing plate 352 to flip away from the opening of the second connecting hole 35, allowing the water to flow into the transmission groove 32. While the water is flowing in the transmission groove 32, the other sealing plate 352 blocks the opening of the corresponding second connecting hole 35. Therefore, after the water in the transmission groove 32 enters the mounting hole 351 and impacts the sealing plate 352, it flows back into the transmission groove 32, reducing the water flow in the transmission groove 32 into the other pressurizing groove 33 and affecting the water pressure intensity when the water is ejected from the jet nozzle 31.

[0051] The implementation principle of a horizontal directional drilling rig according to an embodiment of this application is as follows: During drilling, water jets from nozzle 41 flow out of the hole. Part of the water passes through filter screen 43 and enters collection tank 42, then flows through first connecting hole 34 into pressurizing tank 33. Simultaneously, as water flows from water inlet 5 to nozzle 41, it impacts propeller blade 7, causing control ring 72 to rotate. Pressurizing block 6 slides in pressurizing tank 33, pushing the water flow towards second connecting hole 35. After being compressed, the water pressure increases, and the water flows through second connecting hole 35 into transmission tank 32, then through nozzle 31 before being ejected. This creates a water curtain on the outer periphery of connecting rod 3, moving away from drill bit 4. This reduces the possibility of rocks colliding with connecting rod 3 and causing drill bit 4 to deviate, affecting the drilling direction and improving drilling accuracy.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A horizontal directional drilling rig, characterized in that: include Body (1); Multiple drill rods (2), with adjacent drill rods (2) connected by threads; A connecting rod (3) is provided at the end of the drill rod (2), and the central axis of the connecting rod (3) has an angle with the central axis of the drill rod (2); The drill bit (4) is located at the end of the connecting rod (3) away from the drill rod (2), and the drill bit (4) has a plurality of water jets (41). The drill rod (2) and the connecting rod (3) are respectively formed with interconnected water conveying holes (5), the water conveying holes (5) are connected to the water spray nozzle (41), the machine body (1) transmits water flow to the water conveying holes (5), and the machine body (1) drives the drill rod (2) to rotate and move along the axial direction. A filter screen (43) is provided. A water collection groove (42) is formed on the side of the drill bit (4) away from the connecting rod (3). The filter screen (43) is provided at the opening of the water collection groove (42). The connecting rod (3) has a plurality of water jets (31) evenly spaced along the circumferential direction on its outer periphery. The water jets (31) are located near the drill bit (4) and are inclined away from the drill bit (4). A transmission groove (32) is formed circumferentially inside the connecting rod (3), and the transmission groove (32) is connected to the water jet (31); The connecting rod (3) has a plurality of circumferentially extending pressurizing grooves (33) formed at intervals. The connecting rod (3) has a first connecting hole (34) connecting the pressurizing groove (33) and the water collection tank (42). The connecting rod (3) has a second connecting hole (35) connecting the pressurizing groove (33) and the transmission tank (32). The openings of the first connecting hole (34) and the second connecting hole (35) are far apart from each other. The pressurizing block (6) slides in the pressurizing groove (33). When the pressurizing block (6) passes through the first connecting hole (34) and slides toward the second connecting hole (35), the pressurizing block (6) pressurizes the water flow in the pressurizing groove (33). The elastic power component drives the pressure block (6) to slide toward the side of the first connecting hole (34) away from the second connecting hole (35); The control component is located on the connecting rod (3). When water is sprayed out from the nozzle (41), the control component controls the pressurizing block (6) to slide cyclically in the pressurizing groove (33) to pressurize the water flow in the pressurizing groove (33).

2. A horizontal directional drilling rig according to claim 1, characterized in that: The control assembly includes a power blade (7), a power shaft (71), a control ring (72), a control gear (73), a control rack (74), a toggle block, a control block (76), a transmission shaft (77), a transmission helical gear (78), and a power helical gear (79). The connecting rod (3) has a control groove (36) that communicates with the water nozzle (41). The power shaft (71) is rotatably connected to the connecting rod (3) and located in the control groove (36). The power blades (7) are circumferentially spaced on the outer periphery of the power shaft (71). The power blades (7) protrude into the control groove (36). The control ring (72) is rotatably connected to the connecting rod (3), the control ring (72) is located between the pressurizing groove (33) and the water collection groove (42), and the control rack (74) is disposed on the outer periphery of the control ring (72); The drive shaft (77) is rotatably connected to the connecting rod (3), and the control gear (73) is disposed on the outer periphery of the drive shaft (77). The control gear (73) meshes with the control rack (74). The transmission helical gear (78) is disposed on the outer periphery of the transmission shaft (77), and the power helical gear (79) is disposed on the outer periphery of the power shaft (71). The power helical gear (79) meshes with the transmission helical gear (78). The control ring (72) has a sliding hole (721) extending axially. The control block (76) slides in the sliding hole (721) and protrudes into the sliding hole (721) in a direction away from the water collection tank (42). There are multiple control blocks (76) and they are spaced apart circumferentially. The connecting rod (3) has a moving groove (37) formed circumferentially for the control block (76) to slide. The actuating block is disposed on the side wall of the pressurizing block (6) near the water collection tank (42). The connecting rod (3) forms an actuating hole (38) for the actuating block to slide. The actuating hole (38) connects the moving groove (37) and the pressurizing groove (33). The actuating block passes through the actuating hole (38) and protrudes into the moving groove (37). When the control ring (72) rotates circumferentially, the control block (76) abuts against the actuating block and pushes the pressure block (6) to slide; The connecting rod (3) has a receiving groove (39) corresponding to the second connecting hole (35) and the actuating block has a control surface (752) for the control block (76) to slide. When the control block (76) is aligned with the receiving groove (39), the actuating block pushes the control block (76) to slide into the sliding hole (721). At this time, the control block (76) is separated from the actuating block. The connecting rod (3) is inclined to form a pushing surface (391) located in the receiving groove (39). When the control block (76) slides on the pushing surface (391), the control block (76) slides out of the sliding hole (721).

3. A horizontal directional drilling rig according to claim 2, characterized in that: Two pressure grooves (33) are symmetrically arranged. The actuating block includes a first actuating block (75) and a second actuating block (751). The first actuating block (75) and the second actuating block (751) are radially offset. The control block (76) includes a first control block (761) and a second control block (762). The first control block (761) corresponds to the first toggle block (75) and is evenly spaced along the circumference. The second control block (762) corresponds to the second toggle block (751) and is evenly spaced along the circumference. The first control block (761) and the second control block (762) are offset along the circumference.

4. A horizontal directional drilling rig according to claim 2, characterized in that: The control block (76) has arc-shaped structures at its opposite ends.

5. A horizontal directional drilling rig according to claim 4, characterized in that: The connecting rod (3) has a mounting hole (351) that connects the second connecting hole (35) and the transmission groove (32). The diameter of the mounting hole (351) is larger than the diameter of the second connecting hole (35). The connecting rod (3) is hinged to a sealing plate (352) located in the mounting hole (351), and the connecting rod (3) is provided with an elastic driving member to drive the sealing plate (352) to block the opening of the second connecting hole (35); When water flows from the second connecting hole (35) to the transmission channel (32), the sealing plate (352) opens the second connecting hole (35).

6. A horizontal directional drilling rig according to claim 5, characterized in that: The elastic driving component is a driving torsion spring (353). The connecting rod (3) is rotatably connected to a hinge shaft (354) located in the mounting hole (351), and the sealing plate (352) is fixed to the hinge shaft (354). The drive torsion spring (353) is sleeved on the hinge shaft (354). One end of the drive torsion spring (353) abuts against the side of the sealing plate (352) near the transmission groove (32), and the other end abuts against the wall of the mounting hole (351).

7. A horizontal directional drilling rig according to claim 1, characterized in that: A sealing ring (61) is embedded in the outer peripheral side wall of the pressure block (6), and the sealing ring (61) slides in contact with the groove wall of the pressure groove (33).

8. A horizontal directional drilling rig according to claim 1, characterized in that: The elastic dynamic component is a dynamic spring (63); The pressurizing block (6) has a limiting block (62) that slides on the connecting rod (3) on the side facing away from the water collection tank (42), and the connecting rod (3) has a limiting groove (331) for the limiting block (62) to slide. The power spring (63) is installed in the limiting groove (331). One end of the power spring (63) abuts against the side of the limiting block (62) near the second connecting hole (35), and the other end abuts against the groove wall of the limiting groove (331).

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