Quick-release connector type directional drilling machine power head

Abstract

The utility model relates to the field of coal mine drilling machines, in particular to a quick-release connector type directional drilling machine power head which comprises a main shaft, a transmission and a main power source, the main power source drives the main shaft to rotate through transmission of the transmission, an angle adjuster is further arranged on one side of the transmission, and a driving shaft connected with the main power source is arranged in the transmission. A driving drill rod is installed at the end of the main shaft, a containing hole allowing the driving drill rod to penetrate through is formed in the main shaft, and the end of the driving drill rod is further detachably connected with a two-way connector. The drilling machine power head is convenient to disassemble, assemble and use.

Description

Technical Field

[0001] The utility model relates to the field of coal mine drilling machines, in particular to a quick-disconnect joint type directional drilling machine power head. Background Art

[0002] The power head is an important part of the drilling rig, used to transmit rotation and propulsion power to the drill rod. Traditional hydraulic drilling rigs generally use a chuck to connect the power head and the drill rod. Most existing automatic drilling rigs use an active drill rod to connect the power head and the drill rod. In order to enable a power head to use drill rods of different outer diameters, a composite drill rod connection mechanism of a chuck and an active drill rod has appeared in recent years. The active drill rod is fixedly connected to the front end of the chuck. By installing and removing the active drill rod and switching the use of the active drill rod and the chuck, the purpose of clamping drill rods of different outer diameters can be achieved.

[0003] However, the prior art is not good at disassembling and assembling quickly. Specifically, when the active drill rod needs to be disassembled and switched to the chuck clamping working condition, the water braid must be removed from the rear end, and then the end cover fixing the active drill rod must be removed from the front end. Finally, the combination of the active drill rod and the connecting shaft must be pulled out from the front end of the chuck before the chuck can be used to clamp the drill rod for construction. Since the space from the front end of the chuck to the clamp is very limited and is generally located in the middle of the drilling rig, it is inconvenient to pull out the active drill rod and the connecting shaft, which easily affects the construction efficiency. If the connecting shaft is removed separately from the rear end, since it is located inside the main shaft of the power head, it is not convenient to use larger manual tools such as pipe clamps, and disassembly is time-consuming. It may also be necessary to disassemble more peripheral parts. Therefore, it is necessary to provide a drilling rig power head that is easy to disassemble and use. Utility Model Content

[0004] The utility model aims to provide a quick-disconnect joint type directional drilling rig power head, so as to provide a drilling rig power head which is convenient for disassembly, assembly and use.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a quick-release joint type directional drilling rig power head, including a main shaft, a transmission and a main power source. The main power source drives the main shaft to rotate through the transmission. An angle adjuster is also provided on one side of the transmission. A driving shaft connected to the main power source is provided inside the transmission. An active drill rod is installed at the end of the main shaft. An accommodating hole for the active drill rod to pass through is opened in the main shaft. The end of the active drill rod is also detachably connected with a two-way joint.

[0006] The beneficial effects of this program are:

[0007] When the active drill rod needs to be repaired and replaced, since there is a receiving hole in the main shaft for the active drill rod to pass through, the staff can directly slide the active drill rod together in the receiving hole and take it out from the rear of the main shaft, thereby increasing the speed of disassembling the active drill rod. At the same time, the space at the rear end of the main shaft is relatively ample. If the active drill rod is taken out from the front of the main shaft according to the tradition, on the one hand, the flange plate needs to be disassembled and tightened, and on the other hand, the space in the front is relatively limited, and it is inconvenient to install and disassemble the active drill rod. The above arrangement can facilitate the staff to assemble the active drill rod and then reinstall it into the main shaft, thereby increasing the installation speed of the active drill rod. The power head provided by the present invention is also provided with an angle adjuster, which can adjust the face angle of the tool.

[0008] In the present technical solution, the end of the active drill rod is also detachably connected with a two-way joint. When the thread on one side of the two-way joint is worn to a certain extent, the two-way joint can be removed and the installation direction can be reversed. One end of the two-way joint is fixedly connected to the active drill rod by glue, so that the service life of the active drill rod is equivalent to twice that of the previous integral active drill rod, and there is no need to replace the rod body, which can save a lot of installation time and use costs, and can play an emergency role when constructing in some places where it is inconvenient to repair and replace the active drill rod.

[0009] Preferably, as an improvement, one end of the active drill rod is a male joint and the other end is a female joint, the male joint and the two-way joint are detachably connected, a stopper is provided on the outer periphery of the active drill rod, the outer periphery cross-section of the stopper is polygonal, an end cover is provided on the end of the main shaft, the end cover includes a front end cover and a chuck, the front end cover is fixed on the chuck, a limiting opening is opened on the front end cover, and the front end cover limits the rotation of the stopper through the limiting opening.

[0010] The beneficial effects are as follows: when the main shaft drives the end cover to stop rotating, the limit opening of the front end cover stops rotating synchronously, and the limit opening limits the rotation of the stop part, so that the active drill rod can stop rotating. The above method realizes the limitation of the rotation of the active drill rod, but does not limit the axial sliding of the active drill rod, so that the active drill rod can float axially for a certain distance during operation, which can effectively alleviate the axial impact of the drill rod during the threaded connection and disassembly process, thereby protecting the active drill rod and other connecting parts and extending the service life of the equipment; when the active drill rod produces axial floating, it can reduce the impact force on the water braid part, reduce the wear of the water braid part, and improve its overall durability and reliability.

[0011] Preferably, as an improvement, a limiting section is provided between the female joint and the stop block, the limiting section is located between the chucks, and when the chucks are clamped to the limit position, there is still a gap between the chucks and the outer periphery of the limiting section.

[0012] The beneficial effects are as follows: when the chuck moves to the extreme position, there is still a gap between the chuck and the outer periphery of the limit section, so that the limit section can slide axially along the chuck, and the active drill rod can float axially for a certain distance, so that the clamping force of the chuck will not directly act on the active drill rod, thereby avoiding the active drill rod directly bearing the strong clamping force of the chuck, and avoiding the metal fatigue deformation of the active drill rod during the reciprocating rotation process, thereby reducing fatigue damage and increasing the service life of the active drill rod; due to the axial floating design of the active drill rod, the impact force borne by the water braid during operation is reduced, which makes the force on the water braid more uniform.

[0013] Preferably, as an improvement, it also includes a water braid part for providing pressure fluid to the active drill rod, the water braid part includes a connecting shaft, a core shaft and a water inlet assembly, the core shaft and the connecting shaft are both hollow shafts, the core shaft is fixedly connected and communicated with the connecting shaft, the other end of the connecting shaft is connected to the active drill rod, the core shaft is communicated and rotatably connected with the water inlet assembly, a bearing seat is provided to support the core shaft, and a core shaft support bearing is provided in the bearing seat and is sleeved on the outer periphery of the core shaft.

[0014] The beneficial effects are as follows: by setting a connecting shaft and a water braid, the core shaft is fixedly connected and communicated with the connecting shaft, and the other end of the connecting shaft is connected to the active drill rod, so that the drilling medium flowing into the water braid is transmitted to the active drill rod, and the active drill rod and the water braid are connected. In this technical solution, the core shaft is connected to the active drill rod and rotates together with the active drill rod during operation. The core shaft support bearing can ensure smooth rotation of the core shaft, reduce friction and wear during the rotation process, and extend the service life of the equipment. Through the hollow design of the connecting shaft and the core shaft, the pressure fluid can be smoothly transmitted from the water inlet assembly to the active drill rod, ensuring that the drilling medium can be stably and continuously supplied, thereby improving the drilling efficiency.

[0015] Preferably, as an improvement, the angle adjuster also includes a transmission shaft, a driving piston, a locking portion and a connecting seat. The transmission shaft is fixedly connected to the active shaft, the locking portion includes a fixed gear plate, a spring and a movable gear plate that can engage with each other, the fixed gear plate is fixedly connected to the transmission shaft, the movable gear plate is slidably arranged on the transmission shaft, the spring provides elastic force to enable the movable gear plate to engage with the fixed gear plate, a transmission piston is also slidably arranged on the side of the movable gear plate away from the spring, and the transmission piston can push the movable gear plate and the fixed gear plate to release the engagement after sliding, and a rotary reducer that can drive the transmission shaft to rotate is also provided.

[0016] The beneficial effect is that the spring always applies an axial force toward the fixed toothed disc to the mobile toothed disc, keeping the mobile toothed disc engaged and fixed with the fixed toothed disc, and forms a locking effect on the transmission system of the transmission through the fixed connection between the transmission shaft and the driving shaft, limiting the rotation of the driving shaft. If the rotary reducer is driven at this time, the rotary reducer can drive the driving shaft to rotate at a relatively slow speed, and transmit the rotation through the transmission, thereby accurately controlling the output rotation angle. When the transmission piston slides, the spring is squeezed by the mobile toothed disc and contracts due to the contact between the transmission piston and the mobile toothed disc, and the engagement between the mobile toothed disc and the fixed toothed disc is released. At this time, the main motor can drive the main shaft of the power head and the drill rod to rotate for drilling construction.

[0017] Preferably, as an improvement, the connecting seat is fixedly connected to the gearbox by bolts, the driving piston is sleeved on the transmission shaft and is located on the side of the fixed sprocket away from the movable sprocket, and the driving piston and the transmission piston are abutted against each other, and a sealed chamber is formed between the side of the driving piston away from the spring and the connecting seat, hydraulic oil can be passed into the sealed chamber to drive the driving piston to slide along the transmission shaft, and the driving piston pushes the transmission piston to slide to release the engagement between the movable sprocket and the fixed sprocket.

[0018] Preferably, as an improvement, the cross-section of the outer contour of the anti-rotation portion is a regular hexagon, and the limiting opening is a hexagonal inner hole that matches the anti-rotation portion.

[0019] The beneficial effects of the technical solution are as follows: in a directional drilling rig power head disclosed in the existing patent (publication number: CN116905958A), when it is necessary to replace the active drill rod, the staff needs to first remove the front end cover and then unlock the active drill rod. Since one end of the connecting shaft is threadedly connected to the active drill rod, and the other end is threadedly connected to the core shaft of the water braid, when the staff rotates the active drill rod to unlock it, the active drill rod and the connecting shaft cannot be accurately unlocked, and it is possible that the connecting shaft and the core shaft of the water braid are unlocked. Since the space from the front end of the chuck to the clamp is very limited, in the narrow operating space, even if the active drill rod is taken out alone, it will bring difficulty to the staff's operation. If the connecting shaft and the core shaft of the water braid are unlocked, the staff It becomes very difficult for the workers to take out the active drill rod and the connecting shaft from the front end. At the same time, if it is necessary to switch to the chuck to clamp the salvage drill rod for work, the workers need to remove the water braid from the rear end of the gearbox, take out the water braid and the connecting shaft from the rear end of the gearbox, and then remove the end cover to take out the active drill rod. In this process, it cannot be ensured that the connecting shaft is unlocked from the active drill rod. If the connecting shaft is unlocked from the core shaft of the water braid, the workers also need to take out the active drill rod and the connecting shaft from the front end of the gearbox together before they can load the salvage drill rod into the chuck and switch to the chuck to clamp the drill rod for work. Therefore, the existing technology is very difficult to replace the active drill rod or switch the chuck to clamp the salvage drill rod for work, which seriously affects the construction efficiency.

[0020] In this solution, when the active drill rod needs to be replaced, due to the wide operating space at the rear end of the gearbox, the staff only needs to loosen the chuck first, and then take out the water braid part, the connecting shaft and the active drill rod connection as a whole from the rear end of the gearbox, so as to quickly replace the damaged active drill rod, and then install the new active drill rod, the connecting shaft and the water braid connection as a whole into the gearbox from the rear end of the gearbox, and make the active drill rod pass through the main shaft, the chuck and the front end cover in sequence, so as to quickly complete the replacement of the active drill rod, reduce the uncontrollable factors in the replacement process, and increase the construction efficiency. When it is necessary to switch to the salvage drill rod work, the staff repeats the above disassembly process. During installation, it is only necessary to install the salvage drill rod from the rear end of the gearbox into the main shaft, and pass through the chuck and the front end cover in sequence, and finally clamp the salvage drill rod through the chuck to rotate. At the same time, a part of the active drill rod of the technical solution is located in the chuck and the main shaft, so that when the main shaft drives the active drill rod to rotate through the chuck, the rotation of the active drill rod is more stable and can be more accurately docked with the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional view of an embodiment of the present invention;

[0023] Figure 3 A detailed cross-sectional view of an angle adjuster according to an embodiment of the present invention;

[0024] Figure 4 This is a detailed diagram of an active drill rod according to an embodiment of the present invention;

[0025] Figure 5 This is a detailed view of the water braid portion of an embodiment of the present invention;

[0026] Figure 6 It is a connection diagram of the water braid part of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The figure marks in the drawings of the specification include: main power source 1, active drill rod 11, main shaft 12, accommodating hole 121, active shaft 122, front end cover 123, chuck 124, male joint 111, female joint 112, stop part 113, limit section 114, two-way joint 13, transmission 2, angle adjuster 3, rotary reducer 31, drive piston 32, connecting seat 33, fixed gear plate 34, spring 35, movable gear plate 36, transmission piston 37, transmission shaft 38, sealing chamber 39, first seal 391, second seal 392, water braid 4, connecting shaft 41, core shaft 42, water inlet assembly 43, shell 431, water supply chamber 432, water inlet hole 433, bearing seat 44, core shaft support bearing 45, connecting sleeve 46.

[0029] Example

[0030] The embodiment is basically as follows Figure 1-Figure 6 As shown, Figure 1 and Figure 2 The quick-release joint type directional drilling rig power head shown includes a main shaft 12, a transmission 2 and a main power source 1. The main power source 1 drives the main shaft 12 to rotate through the transmission 2. The main power source 1 can be various rotary power drive devices, such as a hydraulic motor, an electric motor, etc. The main power source 1 of the present application is a hydraulic motor. An angle adjuster 3 is also provided on one side of the transmission 2. A driving shaft 122 connected to the main power source 1 is provided inside the transmission 2. The main power source 1 drives the driving shaft 122 to rotate. An active drill rod 11 is installed at the end of the main shaft 12. A receiving hole 12 is opened in the main shaft 12 for the active drill rod 11 to pass through. The end of the active drill rod 11 can also be detachably connected with a two-way joint 13. Both ends of the two-way joint 13 are provided with external threads, and both ends of the two-way joint 13 can be threadedly connected to the drill rod.

[0031] like Figure 5As shown, it also includes a water braid 4 for supplying pressure fluid to the active drill rod 11, the water braid 4 includes a connecting shaft 41, a core shaft 42 and a water inlet assembly 43, the core shaft 42 and the connecting shaft 41 are both hollow shafts, the core shaft 42 is threadedly fixedly connected and communicated with the connecting shaft 41, the other end of the connecting shaft 41 is communicated with the active drill rod 11, the core shaft 42 is communicated and rotatably connected with the water inlet assembly 43, a bearing seat 44 is provided to support the core shaft 42, and a core shaft support bearing 45 sleeved on the outer periphery of the core shaft 42 is provided in the bearing seat 44. By providing the connecting shaft 41 and the water braid 4, the core shaft 42 is fixedly connected and communicated with the connecting shaft 41, the other end of the connecting shaft 41 is connected to the active drill rod 11, the drilling medium flowing into the water braid 4 is transferred to the active drill rod 11, and the active drill rod 11 and the water braid are connected. In this technical solution, the mandrel 42 is connected to the active drill rod 11 and rotates with the active drill rod 11 during operation. The mandrel support bearing 45 can ensure the smooth rotation of the mandrel 42, reduce friction and wear during the rotation process, and extend the service life of the equipment. Through the hollow design of the connecting shaft 41 and the mandrel 42, the pressure fluid can be smoothly transmitted from the water inlet assembly 43 to the active drill rod 11, ensuring that the drilling medium can be stably and continuously supplied, thereby improving the drilling efficiency. In this embodiment, a water inlet hole 433 is formed at the end of the core shaft 42, and the water inlet assembly 43 includes a shell 431. A water supply chamber 432 connected to the water inlet hole 433 is formed inside the shell 431. The water supply chamber 432 is connected to the water inlet hole 433. An external thread is formed at a section of the connecting shaft 41 close to the active drill rod 11, which is used to connect with the threaded hole at the rear end of the active drill rod 11; an internal thread is formed at one end of the connecting shaft 41 close to the water braid portion 4, which is used to connect with the external thread of the core shaft 42. The bearing seat 44 and the shell 431 are fixedly connected by threads, and a sealing ring is sleeved between the core shaft 42 on both sides of the water inlet hole 433 to achieve sealing of the drilling medium.

[0032] like Figure 4 As shown, one end of the active drill rod 11 is a male connector 111, and the other end is a female connector 112. One end of the male connector 111 is provided with an internal thread that can be threadedly connected to the two-way connector 13. When one end of the two-way connector 13 is threadedly connected to the drill rod for a long time, resulting in thread wear, slipping during connection, etc., the two-way connector 13 can be turned around and threadedly connected to the male connector 111, and this end and the male connector 111 are fixedly threadedly connected by glue. The outer periphery of the active drill rod 11 is provided with a stopper 113, and the cross-section of the stopper 113 is polygonal. The end of the main shaft 12 is provided with an end cover, and the end cover includes a front end cover 123 and a chuck 124. The front end cover 123 is fixed on the chuck 124. A limiting opening is opened on the front end cover 123. The front end cover 123 limits the rotation of the stopper 113 through the limiting opening. In this embodiment, the cross-section of the outer contour of the stopper 113 is a regular hexagon, and the limiting opening is a hexagonal inner hole that matches the stopper 113. As shown Figure 6As shown, it also includes a connecting sleeve 46, through which the water braid part is fixed to the main shaft 12, and the connecting sleeve 46 includes a connecting flange. A hexagonal hole is opened in the center of the connecting sleeve 46, and the right end of the core shaft 42 is a regular hexagon that matches the hexagonal hole and is axially slidably connected to the hexagonal hole. When in use, the end of the core shaft 42 is inserted into the hexagonal hole so that the connecting sleeve 46 can drive the core shaft 42 to rotate when following the rotation of the main shaft 12, and the connecting flange is fixedly connected to the main shaft 12 with threads.

[0033] A gap w is left between the inner end surface of the connecting sleeve 46 facing the active drill rod 11 and the end surface of the connecting shaft 41. A limit section 114 is provided between the female joint 112 and the stop block. The limit section 114 is located between the chuck 124. When the chuck 124 is clamped to the limit position, there is still a gap between the outer periphery of the limit section 114. The outer diameter of the limit section 114 is smaller than the outer diameter of the female joint 112 and the diagonal distance of the stop block. When the chuck 124 moves to the limit position, there is still a gap between the outer periphery of the limit section 114, so that the limit section 114 can move along the chuck 124. Axial sliding allows the active drill rod 11 to float axially for a certain distance, so that the clamping force of the chuck 124 will not directly act on the active drill rod 11, avoiding the active drill rod 11 from directly bearing the strong clamping force of the chuck 124, and avoiding the metal fatigue deformation of the active drill rod 11 during the reciprocating rotation, thereby reducing fatigue damage and increasing the service life of the active drill rod 11; due to the axial floating design of the active drill rod 11, the impact force borne by the water braid part 4 during the working process is reduced, which makes the force on the water braid part 4 more uniform. In this embodiment, the length of the limiting section 114 is greater than the width of the chuck 124, and the length of the limiting section 114 is greater than the clamping width of the chuck 124, so that the active drill rod 11 has a certain floating distance in the chuck 124. The limiting section 114 can slide axially along the chuck 124, so that the active drill rod 11 can float axially for a certain distance. When the main shaft 12 drives the end cover to stop rotating, the front end cover 123 fixedly connected to the main shaft 12 stops rotating synchronously. At this time, the limit opening limits the rotation of the stop part 113, so that the active drill rod 11 can stop rotating. The above method realizes the limitation of the rotation of the active drill rod 11, but does not limit the axial sliding of the active drill rod 11, so that the active drill rod 11 can float axially for a certain distance during operation, which can effectively alleviate the axial impact generated by the drill rod during the threaded connection and disassembly process, thereby protecting the active drill rod 11 and other connecting parts and extending the service life of the equipment; when the active drill rod 11 produces axial floating, it can reduce the impact force on the water braid 4, reduce the wear of the water braid 4, and improve its overall durability and reliability.

[0034] like Figure 3As shown, the angle adjuster 3 also includes a transmission shaft 38, a driving piston 32, a locking portion and a connecting seat 33. The transmission shaft 38 is threadedly connected to the active shaft 122. The locking portion includes a fixed toothed disc 34, a spring 35 and a movable toothed disc 36 that can engage with each other. In this embodiment, the opposite surfaces of the fixed toothed disc 34 and the movable toothed disc 36 are provided with helical teeth that can engage with each other. The fixed toothed disc 34 is fixedly connected to the transmission shaft 38, and the movable toothed disc 36 is slidably arranged on the transmission shaft 38. The spring 35 provides elastic force to make the movable toothed disc 36 engage with the fixed toothed disc 34. A transmission piston 37 is also slidably provided on the side of the movable toothed disc 36 away from the spring 35, and the transmission piston 37 is abutted against the movable toothed disc 36 to push the movable toothed disc 36 and the fixed toothed disc 34 to release the engagement; a rotary reducer 31 that can drive the transmission shaft 38 to rotate is also provided. The spring 35 always applies an axial force toward the fixed toothed disc 34 to the mobile toothed disc 36, keeping the mobile toothed disc 36 engaged and fixed with the fixed toothed disc 34. The fixed connection between the transmission shaft 38 and the driving shaft 122 forms a locking effect on the transmission system of the transmission 2, limiting the rotation of the driving shaft 122. If the rotary reducer 31 is driven at this time, the rotary reducer 31 can drive the driving shaft 122 to rotate at a relatively slow speed, and transmit the rotation through the transmission 2, thereby accurately controlling the output rotation angle. When the transmission piston 37 slides, the spring 35 is squeezed and compressed by the mobile toothed disc 36 due to the contact between the transmission piston 37 and the mobile toothed disc 36, and the engagement between the mobile toothed disc 36 and the fixed toothed disc 34 is released. At this time, the main motor can drive the main shaft 12 of the power head and the drill rod to rotate for drilling construction. By setting the angle adjuster 3 with the function of accurate angle adjustment and locking anti-rotation, accurate and efficient adjustment of the tool face angle is achieved.

[0035] In this embodiment, the connecting seat 33 is fixedly connected to the gearbox by bolts, and the driving piston 32 is sleeved on the transmission shaft 38 and is located on the side of the fixed gear plate 34 away from the movable gear plate 36, and the driving piston 32 and the transmission piston 37 are abutted against each other. A sealing chamber 39 is formed between the side of the driving piston 32 away from the spring 35 and the connecting seat 33, and hydraulic oil can be introduced into the sealing chamber 39 to drive the driving piston 32 to slide along the transmission shaft 38. The driving piston 32 pushes the transmission piston 37 to slide, and the transmission piston 37 pushes the movable gear plate 36 to slide to release the engagement of the movable gear plate 36 with the fixed gear plate 34.

[0036] The outer circle of the connecting seat 33 is three-level, and the diameter of the middle section is the largest, and the end faces of the middle section are respectively connected to the transmission 2 and the rotary reducer 31 to achieve relative axial positioning between the transmission 2, the connecting seat 33 and the rotary reducer 31; the driving piston 32 is a two-level stepped shaft, and the outer circle of one end thereof is provided with a sealing groove, and a sealing ring is installed in the sealing groove and cooperates with the corresponding position of the connecting seat 33 sleeved thereon to form a first seal 391, and the outer circle of the other end cooperates with the sealing ring installed at the corresponding position of the connecting seat 33 to form a second seal 392, and the sealing chamber 39 is located between the first seal 391 and the second seal 392, and an oil inlet connected to the sealing chamber 39 is provided on the connecting seat 33. Under the action of the hydraulic oil entering the sealing chamber 39 through the oil inlet, the driving piston 32 pushes the movable toothed disc 36 in the direction away from the fixed toothed disc 34, so that the movable toothed disc 36 can slide axially along the transmission shaft 38.

[0037] The usage of the quick-release joint type directional drilling rig power head is as follows:

[0038] When the active drill rod 11 needs to be inspected and replaced, since there is a accommodating hole 12 for the active drill rod 11 to pass through in the main shaft 12, the staff can directly slide the water braid part 4, the connecting rod and the active drill rod 11 in the accommodating hole 12 and take them out from the rear of the main shaft 12, thereby improving the speed of disassembly of the active drill rod 11. At the same time, the space at the rear end of the main shaft 12 is relatively ample. If the active drill rod 11 is taken out from the front of the main shaft 12 according to the traditional method, the active drill rod 11 and the connecting shaft 41 can be disassembled and assembled from the rear end of the power head as a whole, which greatly simplifies the disassembly and assembly process and improves the disassembly and assembly efficiency. On the one hand, the flange needs to be disassembled and tightened, and on the other hand, the space in the front is relatively limited, and it is inconvenient to install and disassemble the active drill rod 11. The above arrangement can facilitate the staff to assemble the active drill rod 11 and then re-install it into the main shaft 12, thereby improving the installation speed of the active drill rod 11. The power head provided by the present invention is also provided with an angle adjuster 3, which can adjust the face angle of the tool. The angle adjuster 3 has the functions of accurate angle adjustment and locking to prevent rotation, which not only realizes accurate and efficient adjustment of the tool face angle, but also simplifies the structure of the rotary brake device, and converts the functions of a large number of internal parts into an external reducer, which greatly reduces the difficulty of maintenance and reduces the consumption of wearing parts.

[0039] The end of the active drill rod 11 in the present technical solution can also be detachably connected with a two-way joint 13. When the thread on one side of the two-way joint 13 is worn to a certain extent, the two-way joint 13 can be removed and the installation direction can be reversed, and the worn section of the two-way joint 13 is fixedly connected to the active drill rod 11 by glue. Specifically, a fastening glue is applied to the upper side of the joint of one side of the two-way joint 13 along an axial straight line, and then the glue is applied symmetrically below the side joint. When the side joint and the female joint 112 are tightened, the fastening glue at the left end of the glue-coated end will contact the female joint 112 thread, and the fastening glue will be spread further along the tightening direction. The further to the right, the fewer the number of contact cycles between the fastening glue and the female joint 112 thread, and the smaller the diffusion of the coating; when the glue-coated side is screwed into the female joint 112 of the rod body, the fastening glue previously applied in a straight line will be spread, forming an approximately trapezoidal tape with a left-wide and right-narrow projection on the central symmetry plane of the joint, wherein the tape on one side is as shown in FIG. Figure 5 As shown, a similar method is used to apply glue when the other side is replaced, which complements the strength of the thread itself and better averages the strength of the threaded connection, ensuring the reverse anti-loosening strength and facilitating later disassembly, so that the service life of the active drill rod 11 is equivalent to twice that of the previous integral active drill rod 11, and there is no need to replace the rod body, which can save a lot of installation time and use costs, and can play an emergency role when constructing in some remote places where it is not convenient to repair and replace the active drill rod 11.

[0040] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Quick-release joint type directional drilling rig power head, characterized by: It includes a main shaft, a transmission and a main power source. The main power source drives the main shaft to rotate through the transmission. An angle adjuster is also provided on one side of the transmission. A main shaft connected to the main power source is provided inside the transmission. An active drill rod is installed at the end of the main shaft. An accommodating hole for the active drill rod to pass through is opened in the main shaft. The end of the active drill rod is also detachably connected with a two-way joint.

2. The quick-release joint type directional drilling rig power head according to claim 1, characterized in that: One end of the active drill rod is a male joint, and the other end is a female joint. The male joint and the two-way joint are detachably connected. A stopper is provided on the outer periphery of the active drill rod. The outer periphery cross-section of the stopper is polygonal. An end cover is provided on the end of the main shaft. The end cover includes a front end cover and a chuck. The front end cover is fixed to the chuck by bolts. A limiting opening is opened on the front end cover. The front end cover limits the rotation of the stopper through the limiting opening.

3. The quick-release joint type directional drilling rig power head according to claim 2, characterized in that: A limit section is provided between the female joint and the stop block. The limit section is located between the chucks. When the chucks are clamped to the limit position, there is still a gap between the outer periphery of the limit section. The limit section can float axially in the chuck.

4. The quick-release joint type directional drilling rig power head according to claim 3, characterized in that: It also includes a water braid part that provides pressure fluid to the active drill pipe. The water braid part includes a connecting shaft, a core shaft and a water inlet assembly. The core shaft and the connecting shaft are both hollow shafts. The core shaft is fixedly connected and communicated with the connecting shaft. The other end of the connecting shaft is connected to the active drill pipe. The core shaft is communicated and rotatably connected with the water inlet assembly. A bearing seat is provided to support the core shaft. The bearing seat is provided with a core shaft support bearing sleeved on the outer periphery of the core shaft.

5. The quick-release joint type directional drilling rig power head according to claim 4, characterized in that: The angle adjuster also includes a transmission shaft, a driving piston, a locking portion and a connecting seat. The transmission shaft is fixedly connected to the driving shaft. The locking portion includes a fixed gear plate, a spring and a movable gear plate that can engage with each other. The fixed gear plate is fixedly connected to the transmission shaft. The movable gear plate is slidably arranged on the transmission shaft. The spring provides elastic force to enable the movable gear plate to engage with the fixed gear plate. A transmission piston is also slidably arranged on the side of the movable gear plate away from the spring. After the transmission piston slides, it can push the movable gear plate and the fixed gear plate to release the engagement. A rotary reducer is also provided to drive the transmission shaft to rotate.

6. The quick-release joint type directional drilling rig power head according to claim 5, characterized in that: The connecting seat is fixedly connected to the gearbox by bolts, and the driving piston is sleeved on the transmission shaft and is located on the side of the fixed gear disc away from the movable gear disc, and the driving piston and the transmission piston are against each other, and a sealing chamber is formed between the side of the driving piston away from the spring and the connecting seat, and hydraulic oil can be introduced into the sealing chamber to drive the driving piston to slide along the transmission shaft, and the driving piston pushes the transmission piston to slide to release the engagement between the movable gear disc and the fixed gear disc.

7. The quick-release joint type directional drilling rig power head according to claim 6, characterized in that: The cross section of the outer contour of the anti-rotation part is a regular hexagon, and the limiting opening is a hexagonal inner hole matched with the anti-rotation part.

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