Mine drill pipe installation device

Abstract

The present invention relates to the technical field of coal mine drilling rigs, and discloses a device for installing drill pipes for mining, which includes a frame. A power mechanism and a clamping mechanism are installed on the frame. The power mechanism is used to transmit the rotational and propulsion power required for the installation and disassembly of the drill pipe, and the clamping mechanism is used to clamp the drill pipe. The power mechanism includes a main shaft, a brake assembly, a gearbox, a chuck, and a main power source. The output shaft of the main power source meshes with the gearbox to drive the main shaft to rotate. The brake assembly can perform rotational braking on the gearbox. An active drill pipe is installed at the end of the main shaft. A receiving hole through which the active drill pipe can pass is formed in the main shaft. A two-way joint is also detachably connected to the end of the active drill pipe. The chuck is arranged at the end of the main shaft. The technical solution of the present invention facilitates the disassembly of the active drill pipe and, at the same time, can improve the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine drills, and particularly relates to a mine drill pipe installation device. Background Art

[0002] The power head and the gripper are important components of the mine drill pipe installation device. The power head is used to transmit the rotational and propulsion power required for the installation and disassembly of the drill pipe. The gripper is mainly responsible for gripping the drill pipe, and cooperates with the power head to realize the connection and disengagement of the drill pipe joints, and at the same time ensures that the drill pipe does not slip. The drill pipe usually includes ordinary drill pipes and large drilling tools such as downhole motors.

[0003] Existing automatic drills usually use a drive drill pipe to connect the power head and the drill pipe. In order to enable a power head to use drill pipes with different outer diameters, in recent years, a drill pipe connection mechanism combining a chuck and a drive drill pipe has emerged. The drive drill pipe is fixedly connected to the front end of the chuck. By installing and disassembling the drive drill pipe, the use of the drive drill pipe and the chuck is switched to achieve the purpose of gripping drill pipes with different outer diameters.

[0004] The existing directional drill power head includes a main motor, a transmission, a main shaft, a drive drill pipe, and a swivel. The transmission has a drive shaft. One end of the drive shaft is connected to the main motor, and the drive shaft is meshed and driven with the main shaft through gears in the transmission. One end of the main shaft is circumferentially fixedly connected to the drive drill pipe. The other end of the drive shaft is connected to an angle adjuster through the transmission, so that the directional drill power head has the functions of efficiently and accurately adjusting the tool face and braking the main motor; the mandrel in the swivel is connected to the drive drill pipe with an axial floating structure through a connecting shaft, and a connecting sleeve forming a hexagonal sleeve sliding pair with the connecting shaft is provided at one end of the main shaft close to the swivel, so that the mandrel support bearing is protected from axial impact during drilling, thereby improving its service life and reducing the number of equipment repairs.

[0005] However, the disadvantages of the above technical solutions are as follows: When the drive drill pipe needs to be replaced, first, the end cover fixing the drive drill pipe needs to be removed from the front end, and then the drive drill pipe needs to be unlocked from the connecting shaft before the drive drill pipe can be taken out from the front end. Since the space from the front end of the chuck to the gripper is very limited and is generally located in the middle of the drill, it is inconvenient to pull out the drive drill pipe, which is likely to affect the construction efficiency. Summary of the Invention

[0006] The present invention aims to provide a mine drill pipe installation device to facilitate the disassembly of the drive drill pipe and improve the construction efficiency at the same time.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a mining drill rod installation device, including a frame, on which a power mechanism and a clamping mechanism are installed, the power mechanism is used to transmit the rotation and propulsion power required for assembly and disassembly to the drill rod, the clamping mechanism is used to clamp the drill rod, the power mechanism includes a main shaft, a brake assembly, a gearbox, a chuck and a main power source, the output shaft of the main power source engages with the gearbox to drive the main shaft to rotate, the brake assembly can perform rotational braking on the gearbox, an active drill rod is installed at the end of the main shaft, and 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, and the chuck is arranged at the end of the main shaft.

[0008] The beneficial effects of this solution are as follows: since the brake assembly can perform rotational braking on the gearbox, and cooperate with the directional drilling and drill rod connection and disconnection conditions of the drilling rig, when the active drill rod needs to be inspected 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 in the receiving hole and take it out from the rear of the main shaft, thereby improving the speed of disassembly of 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 traditional method, 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. The above setting can facilitate the staff to assemble the active drill rod and then reinstall it into the main shaft, thereby improving the installation speed of the active drill rod. By setting the brake assembly, the opening and closing of the active drill rod can be adjusted in time.

[0009] Because the active drill pipe often rotates in the opposite direction during operation, the connection between the active drill pipe and the bidirectional joint is prone to loosening. This can be solved using a dispensing process: a straight line of adhesive is applied to the male connector of the bidirectional joint, followed by a symmetrical application on the other side of the same male connector. When the male and female connectors are tightened, the adhesive on the left end of the male connector will come into contact with more threads of the female connector, spreading the adhesive further in the tightening direction. The further to the right, the fewer threads of contact the adhesive has with the female connector, and the less widely applied the adhesive. Therefore, when the male connector is screwed into the female connector of the active drill pipe, the previously applied adhesive is spread out, forming a trapezoidal tape projected onto the central symmetry plane of the joint, wider on the left and narrower on the right. This effectively complements the inherent strength of the threads, effectively equalizing the strength of the threaded connection, ensuring reverse anti-loosening strength and facilitating later disassembly. When the external thread of the male joint of the two-way joint connected to the drill pipe is worn to a certain extent, the two-way joint can be removed and the installation direction can be reversed, and the worn section of the two-way joint can be fixedly connected to the active drill pipe with glue. Since the thread of the male joint previously connected to the active drill pipe is a fixed connection during work and will not wear out, swapping the threads at both ends is equivalent to using the two-head joint twice, and its service life is equivalent to twice that of the previous integral active drill pipe.

[0010] Furthermore, the clamping mechanism includes a rear gripper mounting part and a front gripper mounting part fixedly arranged on the frame. A rear gripper is arranged on the rear gripper mounting part, and a front gripper is arranged on the front gripper mounting part. Both the front gripper mounting part and the rear gripper mounting part are provided with a first through hole for the drill pipe to pass through. The front gripper can rotate around the through hole. An opening for opening the through hole is arranged on the side of the first through hole away from the frame. A large drill can pass through the opening. A flipping part is arranged on the side of the front gripper mounting part. The front gripper can flip around the flipping part and move away from the opening of the front gripper mounting part.

[0011] The beneficial effects of this solution are as follows: The front gripper has two working conditions. Swinging condition: Under normal construction conditions, the front gripper rotates around the first through hole as the rotation axis. At this time, a certain relative rotation can occur between the front gripper and the rear gripper, so that the drill pipe in the front gripper and the drill pipe in the rear gripper or the power head generate a small-angle relative rotation (such as pre-loosening the drill pipe joint) to complete the pre-loosening work of the drill rod. Flipping condition: When installing a large drill or when the front gripper needs to be removed as a whole, the front gripper needs to be flipped out of the front gripper mounting part for easy operation. At this time, it rotates around the flipping part. After the front gripper is flipped out of the front gripper mounting part, since the first through holes of the front gripper mounting part and the rear gripper mounting part are both provided with openings, the side of the first through hole away from the frame is in an open state. The axis of the large drill can be directly parallel to the axis of the drill hole and directly placed into the rear gripper through the opening to complete the installation work of the large drill. After the installation of the large drill is completed, the front gripper is flipped back to its original position to restore the connection structure in the swinging condition. There is no need to adjust the up and down inclination angles of the inner hole axis of the gripper multiple times as in the first solution, nor to remove the gripper as a whole and consume a large amount of manpower and construction time as in the second solution. The installation process is simple and fast.

[0012] Furthermore, both the front gripper and the rear gripper include a clamping oil cylinder and a jaw assembly. The clamping oil cylinder and the jaw assembly are arranged on both sides of the first through hole. The jaw assembly includes an outer jaw and an inner jaw. The outer jaw is detachably connected to the output shaft of the clamping oil cylinder and forms a moving pair under the drive of the output shaft. The inner jaw is detachably connected to the outer jaw.

[0013] The beneficial effects of this solution are as follows: The gripper generally adopts a structure in which the slips are installed on the surface of the slip seat. After assembly, it can only be used for gripping drill pipes of one outer diameter. If it is required to be used for drill pipes of other outer diameters such as large drilling tools and fishing drill pipes, complex operations of removing and replacing the slips are necessary, and this operation will also consume a lot of time. Therefore, the existing drill rig grippers are also difficult to adapt to drill pipes of different specifications. Through the design of the inner slip and the outer slip, this solution can simultaneously adapt to drill pipes of two pipe diameters. When the inner slip is severely worn or it is necessary to replace the drill pipe with a smaller outer diameter with a drill pipe with a larger outer diameter, the inner slip needs to be disassembled. Only by fully retracting the output shaft and unscrewing the connecting screws between the inner slip and the outer slip can the inner slip be removed. When installing the inner slip, it only needs to fix the new inner slip on the outer slip, which greatly simplifies the operation process of removing and replacing the slips, reduces the operation time, and improves the construction efficiency.

[0014] Furthermore, the front projection of the inner slip is in the shape of a "plus" sign. The main cross-section of the middle section of the inner slip is arc-shaped, and convex platforms are symmetrically arranged on the upper and lower sides. On the side of the convex platform facing the center of the first through hole, there is a counterbore for installing the screw connecting the outer slip and the inner slip; on the inner surface of the outer slip, there is a rectangular plane for fitting with the convex platform of the inner slip, and threaded holes for fitting with the counterbore provided on the convex platform are arranged on the rectangular plane. Two blocks are perpendicularly arranged on each side of the rectangular plane, and the surfaces of the blocks close to the rectangular plane form four stopping surfaces; the blocks on the same side extend towards each other to form two arc surfaces, and the diameter of the arc surface matches the diameter of the larger drill pipe and the outer diameter of the inner slip; the combination of the arc surface and the four stopping surfaces forms the installation space for the inner slip.

[0015] The beneficial effects of this solution are as follows: The front projection of the inner slip is in the shape of a "plus" sign, and 4 positioning planes are symmetrically arranged on the left and right. The positioning planes cooperate with the corresponding 4 stopping planes of the outer slip to realize the positioning of the inner slip along the front and back axial directions of the gripper. The positioning of the inner slip in the radial direction of the arc (i.e., the telescopic direction of the clamping cylinder) is realized by the screws connecting with the outer slip.

[0016] This positioning method gives full play to the advantage of high tensile strength of the threaded connection, and at the same time avoids the weakness of its low shear strength, reducing the possibility of deformation of the slip positioning parts.

[0017] Furthermore, a number of convex blocks or fine pointed teeth for increasing the friction with the surface of the drill pipe are arranged on the inner surfaces of the inner slip and the outer slip.

[0018] The beneficial effects of this solution are as follows: By arranging convex blocks or fine pointed teeth for increasing the friction with the surface of the drill pipe, the probability of the drill pipe slipping is reduced, and the working efficiency during installation or disassembly is improved.

[0019] Furthermore, the front gripper further includes a swing body. The clamping oil cylinders are installed at both ends of the swing body. A driving member is hinged to the frame, and the output shaft of the driving member is hinged to the bottom of the swing body below the flipping part.

[0020] The beneficial effect of this solution is that due to the setting of the driving member, it is convenient to drive the swing body to swing or flip.

[0021] Furthermore, it further includes a guide sleeve assembly. The guide sleeve assembly includes a front gripper guide sleeve. The front gripper guide sleeve includes two groups of guide sleeves. There is a second through hole on the swing body, and the two guide sleeves are respectively detachably connected to the second through holes on both sides of the swing body. Each group of guide sleeves includes an inner guide sleeve and an outer guide sleeve. The outer diameters of the inner guide sleeve and the outer guide sleeve are both divided into two levels: a small-diameter section and a large-diameter section. The small-diameter section of the outer guide sleeve can be sleeved inside the small-diameter section of the inner guide sleeve; the small-diameter section of the inner guide sleeve is coaxial with the second through hole, and the large-diameter section is coaxial with the first through hole of the front gripper mounting part.

[0022] The beneficial effect of this solution is that during the operation of the gripper, the drill pipe needs to continuously enter and exit the gripper. Since the jaw assemblies on both sides of the gripper need to be opened and closed frequently and the distance often changes, it generally does not have a guiding function itself. Therefore, a guide sleeve is generally specially provided in front of the gripper for guiding the drill pipe to enter and exit the gripper to prevent the drill pipe from deviating too much from the axis and causing damage to the gripper and the power head. In the traditional drill rig structure, the gripper and the guide sleeve are generally set as two independent components at the front end of the frame, occupying a relatively large length space. Some drill rigs used in relatively narrow spaces or with compact structure requirements cancel the guide sleeve to save the space in the drilling direction. The inner sleeve of the traditional guide sleeve is a rotatable hollow cylinder, and one inner sleeve can only adapt to a drill pipe with one outer diameter. After the drill rig changes the diameter of the drill pipe, the entire guide sleeve must be replaced or the inner sleeve must be replaced separately to adapt to the outer diameter of the new drill pipe. Replacing the entire guide sleeve is relatively simple, but the spare part cost is relatively high; replacing the inner sleeve separately is relatively complex, but the cost is low, which is the commonly used method on site at present. However, there is also a problem that it is difficult to identify and manage the accessories when replacing the inner sleeve separately. Since the specifications of several drill pipes used in the same drill rig are close, the difference in the drill pipe diameter is generally about 10 mm, and the difference in the thickness of the inner sleeve is only a few millimeters. It is very difficult to identify such a small difference without measuring tools in the underground field, so the on-site accessory management is also relatively difficult. At the same time, since the guide sleeve and the gripper are two independent components, a large installation space is required, resulting in a longer frame of the drill rig, and the guide sleeve can only be suitable for one drill pipe, which is difficult to replace on site.

[0023] This solution sets an inner guide sleeve and an outer guide sleeve to accommodate drill pipes of two specifications. At the same time, the guide sleeve is fixed on the swing body, serving as the connection point for the rotational connection between the swing body and the front gripper mounting position in the normal construction state. When flipping is required, only the guide sleeve needs to be disassembled, and the position of the rotational connection between the swing body and the front gripper is converted to the axis of the flipping hole through pins or other forms, thus completing the switching of working conditions with simple operation. In addition, the guide sleeve and the gripper are integrated into a whole, reducing the requirement for installation space and making the overall layout of the drilling rig more compact. At the same time, the structural differences between the inner guide sleeve and the outer guide sleeve are obvious, facilitating on-site fitting management and identification.

[0024] Furthermore, the guide sleeve assembly further includes a semi-circular guide sleeve. The semi-circular guide sleeve is coaxial with the guide sleeve and is fixedly connected to the rear gripper mounting part. The notch direction of the semi-circular guide sleeve is the same as the opening direction.

[0025] The beneficial effects of this solution are as follows: By setting a semi-circular guide sleeve at the rear gripper mounting part and setting the notch direction of the semi-circular guide sleeve to be the same as the opening direction of the first through hole, the rear gripper is in an open state. When installing or disassembling the drill pipe, the drill pipe can not only be inserted into the rear gripper from one end of the first through hole, but also be directly placed into the rear gripper from the open end, improving the installation and disassembly efficiency of the drill pipe.

[0026] Furthermore, the outer diameter of the semi-circular guide sleeve is divided into two levels: a small-diameter section and a large-diameter section. The outer diameter of the small-diameter section is less than or equal to the inner diameter of the first through hole of the rear gripper mounting part, and the large-diameter section is detachably connected to the side of the rear gripper mounting part away from the front gripper mounting part.

[0027] The beneficial effects of this solution are as follows: When connecting, all the screws are located in the countersunk holes. On the one hand, it can improve the aesthetics of the equipment. At the same time, it can also reduce problems such as screw loosening caused by the vibration of the drilling rig during operation. In addition, since the screws are located in the countersunk through holes, it can also reduce problems such as collision damage between the drill pipe and the screw heads during the installation or disassembly of the drill pipe.

[0028] Furthermore, the inner diameter of the semi-circular guide sleeve is greater than or equal to the outer diameter of the drill pipe.

[0029] The beneficial effects of this solution are as follows: By setting the inner diameter of the semi-circular guide sleeve to be greater than or equal to the outer diameter of the drill pipe, the inner diameter of the semi-circular guide sleeve can match drill pipes of different outer diameters of the drilling rig, and the drill pipe is loaded into the gripper from the top opening.

[0030] Furthermore, the swinging body includes a swinging support plate with a "U"-shaped cross-section. Front gripper mounting positions are fixed at both ends of the swinging support plate, and rear gripper mounting positions are fixedly arranged at both ends of the rear gripper mounting part; the clamping oil cylinder includes two cylinder barrels, which are symmetrically and fixedly installed at the front gripper mounting position and the rear gripper mounting position respectively. The output shaft is slidably arranged in the cylinder barrel and extends from both sides of the first through-hole towards the center, and the outer collet is detachably connected to the output shaft of the clamping oil cylinder.

[0031] The beneficial effects of this solution are as follows: 1. Structural stability: The swinging support plate with a "U"-shaped cross-section provides a solid support foundation, enhancing the rigidity and stability of the entire gripper system and ensuring reliable operation under high-load conditions; 2. Maintenance convenience: The modular design of the front and rear grippers facilitates independent maintenance and replacement, reducing maintenance costs and downtime, and improving the availability and economy of the equipment; 3. The piston rod of the clamping oil cylinder extends from both sides of the first through-hole towards the center and is fixedly connected to the output shaft. This design ensures the synchronization and precise control of the clamping action, facilitating the precise execution of the clamping and releasing actions of the drill pipe. At the same time, by symmetrically fixing the clamping oil cylinder at the front gripper mounting position and the rear gripper mounting position, uniform distribution of the clamping force is achieved, improving the clamping accuracy and stability and reducing the risk of deflection or slipping of the drill pipe during operation.

[0032] Furthermore, the swinging body further includes a front lining plate, which is fixedly connected to the top of the swinging support plate and forms a collet sliding guide cavity that matches the outer dimensions of the outer collet with the swinging support plate. The collet assembly is slidably arranged in the collet sliding guide cavity.

[0033] The beneficial effect of this solution is that through the limiting and guiding effects of the collet sliding guide cavity, the sliding of the piston rod of the clamping oil cylinder is always kept stable, reducing the wear of the piston rod.

[0034] Furthermore, a swinging ear seat and a hinge shaft seat corresponding to the flipping part are fixedly connected to the lower part of one side of the swinging body. The swinging ear seat is hinged with a driving member that drives the swinging body to swing around the flipping part; the driving member is a telescopic member, one end of which is hinged to the frame and the other end is hinged to the swinging ear seat.

[0035] The beneficial effect of this solution is that by driving the swinging body to rotate and flip with the telescopic driving member, the operator only needs to replace the corresponding parts when switching working conditions, reducing the labor input and improving the automation of the equipment.

[0036] Furthermore, it further includes a mounting plate. The rear gripper mounting part and the front gripper mounting part are both fixedly arranged on the mounting plate, and the mounting plate is fixedly connected to the frame.

[0037] The beneficial effects of this solution are as follows: Both the rear gripper mounting part and the front gripper mounting part are fixedly arranged on the mounting plate to form a base. The swinging body and the rear gripper are both mounted on the base, which is convenient for subsequent maintenance.

[0038] Furthermore, the front gripper mounting part includes a front support plate and a rear support plate. The front support plate and the rear support plate are fixedly parallel to each other on the mounting plate. The first through-hole is provided on the front support plate and the rear support plate, and the opening is on the side of the front support plate and the rear support plate away from the mounting plate. The swinging body is rotatably arranged between the front support plate and the rear support plate.

[0039] Furthermore, a reinforcing plate is detachably connected to the opening sides of the front support plate and the rear support plate.

[0040] The beneficial effects of this solution are as follows: Through the design of the reinforcing plate, the structural strength reduction of the front support plate and the rear support plate caused by the unilateral opening is effectively reduced. At the same time, the detachable connection method is designed, and the reinforcing plate can also be disassembled during the installation of large drilling tools or maintenance to avoid the influence of the reinforcing plate on the installation of large drilling tools or the maintenance of drill pipes.

[0041] Furthermore, the brake assembly includes a brake cover, a clamping piston, and a releasing piston. The gearbox includes a gear shaft and multiple-stage gears. A transmission shaft connected to the gear shaft is provided inside the brake assembly. A sliding shaft is provided inside the brake cover. One end of the transmission shaft extends into the center of the clamping piston. A plurality of first jaws are circumferentially distributed on the transmission shaft. The clamping piston is sleeved on the first jaws and can move axially. The surface of the first jaws away from the transmission shaft is an inclined surface, and the surface of the clamping piston opposite to the first jaws is a slope surface that matches the inclined surface of the first jaws. The clamping piston can slide through the first jaws to clamp the transmission shaft, and the releasing piston is slidably sleeved on the sliding shaft and can push the clamping piston to release the clamping.

[0042] The beneficial effects of this solution are as follows: The surface of the clamping piston opposite to the first jaws is a slope surface that matches the inclined surface of the first jaws. The clamping piston can slide so that the slope surface inside it contacts the inclined surface of the first jaws. The transmission shaft is clamped by the radial movement of the first jaws, thereby restricting the rotation of the transmission shaft. Through the axial sliding of the clamping piston and the radial movement of the first jaws, the rapid clamping and releasing of the transmission shaft are realized. The cooperation between the inclined surface and the slope surface provides a stable clamping force, ensuring that the transmission shaft will not slide during the working process, ensuring the reliability of clamping the transmission shaft, and being able to adapt to transmission shafts of different diameters. Even if the surface of the transmission shaft is worn, stable clamping can still be achieved by extending the sliding distance of the clamping piston, with strong versatility and can be applied to power heads of various types of drilling rigs.

[0043] Furthermore, an oil inlet one and an oil inlet two are provided on the brake cover. A first oil chamber is formed between the release piston and the brake cover on the side away from the clamping piston. The oil inlet one can supply hydraulic oil to the first oil chamber. A second oil chamber is provided on the side of the clamping piston away from the release piston. The oil inlet two can supply hydraulic oil to the second oil chamber.

[0044] The beneficial effects of this solution are as follows: The pressure oil enters the second oil chamber from the oil inlet two, pushing the clamping piston to move towards the first jaw, making the slope inside it contact the inclined surface of the first jaw. Therefore, the first jaw is pushed to move inwards, and the radial displacement of the first jaw is restricted, thus clamping the transmission shaft and achieving the braking of the transmission shaft. The pressure oil enters the first oil chamber from the oil inlet one, pushing the release piston to move. The end face of the release piston pushes the clamping piston to move away from the first jaw, releasing the restriction on the radial displacement of the first jaw, and thus releasing the restriction on the rotation of the transmission shaft. The automatic control of the brake assembly is realized through the hydraulic system, improving the automation level and efficiency of the operation. The hydraulic pressure can provide stable and adjustable pressure, ensuring the accuracy of the clamping and releasing processes. In addition, the hydraulic system has high stability and reliability, ensuring that the brake assembly can work stably under various working conditions, reducing the failure rate and maintenance cost.

[0045] Furthermore, it also includes a swivel joint part that provides pressure fluid to the kelly. The swivel joint part includes a connecting shaft, a core shaft, and a water inlet assembly. Both the core shaft and the connecting shaft are 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 kelly. 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 sleeved on the outer periphery of the core shaft is provided inside the bearing seat.

[0046] The beneficial effects of this solution are as follows: By setting the connecting shaft and the swivel joint part, the core shaft is fixedly connected and communicated with the connecting shaft, and the other end of the connecting shaft is connected to the kelly, transmitting the drilling medium flowing into the swivel joint part to the kelly and connecting the kelly and the swivel joint part. In this technical solution, the core shaft is connected to the kelly and rotates together with the kelly during the working process. The core shaft support bearing can ensure the smooth rotation of the core shaft, reducing the friction and wear during the rotation process and extending the service life of the equipment. Through the hollow design of the connecting shaft and the core shaft, the pressure fluid can smoothly be transmitted from the water inlet assembly to the kelly, ensuring the stable and continuous supply of the drilling medium and improving the drilling efficiency.

[0047] Furthermore, one end of the kelly is a male joint, and the other end is a female joint. The male joint is detachably connected to the double - way joint. An anti - rotation part is provided on the outer periphery of the kelly. The cross - section of the outer periphery of the anti - rotation part is polygonal. An end - cover part is provided at the end of the main shaft. The end - cover part includes a front end - cover. The front end - cover is fixed on the chuck. A limiting opening is provided on the front end - cover. The rotation of the anti - rotation part is limited by the front end - cover through the limiting opening.

[0048] The beneficial effects of this solution are as follows: When the spindle drives the end cover part to stop rotating, the limiting opening of the front end cover stops rotating synchronously, and the rotation of the anti-rotation part is limited by the limiting opening, so that the driving drill rod can stop rotating. The above method realizes the limitation of the rotation of the driving drill rod, but does not limit the axial sliding of the driving drill rod, enabling the driving drill rod to axially float a certain distance during the working process, which can effectively relieve the axial impact generated during the threaded connection and disassembly of the drill rod, thereby protecting the driving drill rod and other connecting components and extending the service life of the equipment; when the driving drill rod generates axial floating, the impact force on the water braid part can be reduced, the wear of the water braid part can be reduced, and the overall durability and reliability can be improved.

[0049] Furthermore, a limiting section is provided between the female joint and the anti-rotation block. The limiting section is located between the chucks, and there is still a gap between the outer periphery of the limiting section and the chucks when the chucks are clamped to the limit position.

[0050] The beneficial effects of this solution are as follows: There is still a gap between the outer periphery of the limiting section and the chucks when the chucks move to the limit position, enabling the limiting section to axially slide along the chucks, allowing the driving drill rod to axially float a certain distance, so that the clamping force of the chucks will not directly act on the driving drill rod, avoiding the driving drill rod from directly bearing the strong clamping force of the chucks, and avoiding the metal fatigue deformation of the driving drill rod during the reciprocating rotation due to the force deformation, thereby reducing the fatigue damage and increasing the service life of the driving drill rod; due to the axial floating design of the driving drill rod, the impact force borne by the water braid part during the working process is reduced, making the force on the water braid part more uniform.

[0051] Furthermore, the length of the limiting section is greater than the length of the chucks.

[0052] The beneficial effects of this solution are as follows: The length of the limiting section being greater than the length of the chucks clamped by the chucks allows the driving drill rod to have a certain floating distance in the chucks to relieve the axial impact generated when the driving drill rod is buckled or unbuckled with the drill rod, thereby playing a role in protecting the driving drill rod.

[0053] Furthermore, a water inlet hole is provided at the end of the mandrel. The water inlet assembly includes a housing, and a water supply cavity communicating with the water inlet hole is provided in the housing. The water supply cavity communicates with the water inlet hole. An external thread for threaded connection with the rear end of the driving drill rod is provided at one end of the connecting shaft close to the driving drill rod, and an internal thread for threaded connection with the mandrel is provided at one end of the connecting shaft close to the water braid part.

[0054] The beneficial effects of this solution are as follows: Since an external thread for threaded connection with the rear end of the driving drill rod is provided at one end of the connecting shaft close to the driving drill rod, and an internal thread for threaded connection with the mandrel is provided at one end of the connecting shaft close to the water braid part, it is convenient to connect the mandrel and the driving drill rod at both ends of the connecting shaft.

[0055] Furthermore, the water braid part further includes a connecting sleeve, the connecting sleeve includes a connecting flange, and the connecting flange is provided with kidney-shaped holes for bolts to pass through. The water braid part is fixed on the gearbox through the connecting sleeve.

[0056] The beneficial effect of this solution is that by setting kidney-shaped holes on the connecting flange and fixing with bolts, it is convenient for the staff to disassemble the connecting sleeve.

[0057] Furthermore, a hexagonal inner hole is provided in the center of the connecting sleeve, and the outer wall of the core shaft is a regular hexagon that fits with the hexagonal inner hole and is slidably connected to the hexagonal inner hole.

[0058] The beneficial effect of this solution is that the hexagonal inner hole in the center of the connecting sleeve and the core shaft form a moving pair, restricting the relative rotation between the core shaft and the transmission.

[0059] Furthermore, there is a gap between the end face of the connecting sleeve facing the active drill pipe and the end face of the connecting shaft.

[0060] The beneficial effect of this solution is that since there is a gap between the end face of the connecting sleeve facing the active drill pipe and the end face of the connecting shaft, the limiting section can slide axially along the chuck, enabling the active drill pipe to axially float a certain distance.

[0061] Furthermore, a grease nipple is provided on the bearing seat, and the grease nipple is communicated with the inside of the bearing seat.

[0062] The beneficial effect of this solution is that the grease nipple can provide lubricating oil to the core shaft support bearing, maintaining the lubrication of the core shaft support bearing, reducing the friction of the bearing under high load conditions, and extending the service life of the bearing; effective lubrication reduces the wear and heat accumulation of the bearing, avoids bearing damage caused by overheating, and improves the reliability and durability of the equipment. Description of the Drawings

[0063] Figure 1 It is a schematic structural diagram of the mine drill pipe installation device in the present invention;

[0064] Figure 2 It is a cross-sectional view of the power mechanism in the present invention;

[0065] Figure 3 It is a detailed view of the brake assembly in the present invention;

[0066] Figure 4 It is a detailed view of the active drill pipe in the present invention;

[0067] Figure 5 It is a detailed view of the water braid part in the present invention;

[0068] Figure 6 It is a connection schematic diagram of the water braid part in the present invention;

[0069] Figure 7It is the right view of the connecting sleeve in the present invention;

[0070] Figure 8 It is the three-dimensional view of the clamping mechanism of the present invention;

[0071] Figure 9 It is the front view of the clamping mechanism of the present invention;

[0072] Figure 10 is Figure 9 the cross-sectional view at A-A in

[0073] Figure 11 It is the three-dimensional view of the base of the present invention;

[0074] Figure 12 It is the three-dimensional view of the base of the present invention after removing the reinforcing plate;

[0075] Figure 13 It is the three-dimensional view of the swinging body of the present invention;

[0076] Figure 14 It is the three-dimensional view of the external slip of the present invention;

[0077] Figure 15 It is the three-dimensional view of the internal slip of the present invention;

[0078] Figure 16 It is the three-dimensional view of the semi-ring guide sleeve of the present invention;

[0079] Figure 17 It is the three-dimensional view of the external guide sleeve of the present invention;

[0080] Figure 18 It is the schematic diagram of the inner guide sleeve of the present invention;

[0081] Figure 19 It is the schematic diagram of the adhesive of the two-way joint in the present invention. Specific embodiments

[0082] The following is a further detailed description through specific embodiments:

[0083] The reference numerals in the accompanying drawings of the specification include: frame 1, power mechanism 2, clamping mechanism 3, main power source 4, main drill pipe 5, main shaft 6, front end cover 7, chuck 8, accommodation hole 9, male connector 10, female connector 11, anti-rotation portion 12, limiting section 13, two-way connector 14, gearbox 15, brake assembly 16, brake cover 17, clamping piston 18, releasing piston 19, sliding shaft 20, first slip 21, transmission shaft 22, first oil inlet 23, second oil inlet 24, key 25, water braid portion 26, connecting shaft 27, core shaft 28, housing 30, water supply chamber 31, water inlet hole 32, bearing seat 33, core shaft support bearing 34, connecting sleeve 35, kidney-shaped hole 36, grease nipple 37, mounting plate 38, front gripper mounting portion 39, front support plate 40, rear support plate 41, reinforcing plate 42, flipping hole 43, flipping plate 44, rear gripper mounting portion 45, front side plate 46, rear side plate 47, rear lining plate 48, rear gripper mounting position 49, swinging body 50, swinging support plate 51, front gripper mounting position 52, front lining plate 53, swinging ear seat 54, hinge shaft seat 55, front gripper 56, rear gripper 57, inner slip 58, boss 59, outer slip 60, rectangular plane 61, clamping block 62, inner guide sleeve 63, outer guide sleeve 64, semi-ring guide sleeve 65, small diameter section 66, large diameter section 67, driving member 68.

[0084] Embodiment

[0085] The mining drill pipe installation device is basically as Figure 1-19 shown.

[0086] As Figure 1 shown, the mining drill pipe installation device includes a frame 1, on which a power mechanism 2 and a clamping mechanism 3 are installed. The power mechanism 2 is used to transmit the rotational and propulsion power required for the installation and disassembly of the drill pipe, and the clamping mechanism 3 is used to clamp the drill pipe.

[0087] As Figure 1-2 shown, the power mechanism 2 includes a main shaft 6, a brake assembly 16, a gearbox 15, and a main power source 4. The output shaft of the main power source 4 meshes with the gearbox 15 to drive the main shaft 6 to rotate. The main power source 4 can be various rotational power driving devices, such as a hydraulic motor, an electric motor, etc. In this application, the main power source 4 is a hydraulic motor. The gearbox 15 includes a gear shaft and multiple stages of gears. The brake assembly 16 internally has a transmission shaft 22 connected to the gear shaft. The transmission shaft 22 is connected to the gear shaft through a key 25 and rotates synchronously. The brake assembly 16 performs rotational braking on the transmission shaft 22. The end of the main shaft 6 is installed with a main drill pipe 5, and an accommodation hole 9 for the main drill pipe 5 to pass through is formed in the main shaft 6.

[0088] As Figure 3As shown, the brake assembly 16 includes a brake cover 17, a clamping piston 18, and a release piston 19. A sliding shaft 20 is provided inside the brake cover 17. The left end of the transmission shaft 22 extends into the center of the clamping piston 18. A plurality of first jaws 21 are circumferentially distributed on the transmission shaft 22. In this embodiment, the number of the first jaws 21 is 3. The clamping piston 18 is sleeved outside the first jaws 21 and can axially move along the transmission shaft 22. The surface of the first jaws 21 away from the transmission shaft 22 is an inclined surface, and the surface of the clamping piston 18 opposite to the first jaws 21 is a slope surface that matches the inclined surface of the first jaws 21. The clamping piston 18 can slide to push the first jaws 21 to radially slide and clamp the transmission shaft 22. The release piston 19 is slidably sleeved on the sliding shaft 20 and can push the clamping piston 18 to release the clamping. The surface of the clamping piston 18 opposite to the first jaws 21 is a slope surface that matches the inclined surface of the first jaws 21. The clamping piston 18 can slide to make the slope surface inside it contact the inclined surface of the first jaws 21, and the first jaws 21 radially move to clamp the transmission shaft 22, thereby restricting the rotation of the transmission shaft 22. Through the axial sliding of the clamping piston 18 and the radial movement of the first jaws 21, the rapid clamping and release of the transmission shaft 22 are realized. The cooperation between the inclined surface and the slope surface provides a stable clamping force, ensuring that the transmission shaft 22 will not slide during the working process, ensuring the reliability of clamping the transmission shaft 22, and being able to adapt to transmission shafts 22 with different diameters. Even if the surface of the transmission shaft 22 is worn, stable clamping can be achieved by extending the sliding distance of the clamping piston 18, which has strong versatility.

[0089] As Figure 3As shown, an oil inlet one 23 and an oil inlet two 24 are formed on the brake cover 17. A first oil cavity is formed between the release piston 19 and the brake cover 17 on the side away from the clamping piston 18 when the release piston 19 is loosened. The oil inlet one 23 can supply hydraulic oil to the first oil cavity. A second oil cavity is provided on the side of the clamping piston 18 away from the release piston 19. The oil inlet two 24 can supply hydraulic oil to the second oil cavity. Sealing rings are provided on both the inner wall and the outer wall of the release piston 19, and a sealing ring is also provided on the outer wall sleeve of the clamping piston 18. The setting of the sealing rings effectively prevents the leakage of hydraulic oil and ensures that the pressure inside the hydraulic structure remains stable. The pressure oil enters the second oil cavity from the oil inlet two 24, pushing the clamping piston 18 to move to the left, making the slope inside it contact the slope of the first jaw 21. Therefore, the first jaw 21 is pushed to move inwards, and the radial displacement of the first jaw 21 is restricted, thus clamping the transmission shaft 22 to achieve the braking of the transmission shaft 22; the pressure oil enters the first oil cavity from the oil inlet one 23, pushing the release piston 19 to move, and its end face pushes the clamping piston 18 to move to the right, releasing the restriction on the radial displacement of the jaw, and also releasing the restriction on the rotation of the transmission shaft 22. The automatic control of the brake assembly 16 is realized through hydraulic pressure, improving the automation level and efficiency of the operation. Hydraulic pressure can provide stable and adjustable pressure to ensure the accuracy of the clamping and releasing processes, and the hydraulic pressure has high stability and reliability, ensuring that the brake assembly 16 can work stably under various working conditions, reducing the failure rate and maintenance cost.

[0090] It also includes a swivel section 26 for supplying pressurized fluid to the kelly 5, such as Figure 5 and Figure 6As shown, the water braid part 26 includes a connecting shaft 27, a connecting sleeve 35, a mandrel 28, a bearing seat 33 and a water inlet assembly. Both the mandrel 28 and the connecting shaft 27 are hollow shafts. The mandrel 28 is fixedly connected and communicated with the connecting shaft 27. The other end of the connecting shaft 27 is connected to the active drill pipe 5. The mandrel 28 is communicated with and rotatably connected to the water inlet assembly. The bearing seat 33 is used to support the mandrel 28, and a mandrel support bearing 34 sleeved on the outer periphery of the mandrel 28 is arranged in the bearing seat 33. The water inlet assembly includes a housing 30. A water supply cavity 31 communicated with a water inlet hole 32 is arranged in the housing 30. The water supply cavity 31 is communicated with the water inlet hole 32. The right end of the connecting shaft 27 is provided with an external thread for threaded connection with the rear end of the active drill pipe 5. The left end of the connecting shaft 27 is provided with an internal thread for threaded connection with the mandrel 28, so as to transfer the drilling medium flowing into the water braid part 26 to the active drill pipe 5 and connect the active drill pipe 5 and the water braid part 26. In this technical solution, the mandrel 28 is connected to the active drill pipe 5 and rotates together with the active drill pipe 5 during the working process. The mandrel support bearing 34 can ensure the smooth rotation of the mandrel 28, reduce the friction and wear during the rotation process, and extend the service life of the equipment. The connecting shaft 27 and the mandrel 28 are hollow inside, and the pressure fluid can smoothly be transmitted from the water inlet assembly to the active drill pipe 5, ensuring that the drilling medium can be stably and continuously supplied and improving the drilling efficiency. A grease nipple 37 is arranged on the bearing seat 33. The grease nipple 37 is communicated with the inside of the bearing seat 33. The grease nipple 37 can provide lubricating oil for the mandrel support bearing 34, keep the lubrication of the mandrel support bearing 34, reduce the friction of the bearing under high load conditions, and extend the service life of the bearing. Effective lubrication reduces the wear and heat accumulation of the bearing, avoids the bearing damage caused by overheating, and improves the reliability and durability of the equipment. The water braid part 26 is fixed on the main shaft 6 through the connecting sleeve 35. As Figure 7 shown, the connecting sleeve 35 includes a connecting flange. Waist-shaped holes 36 for bolts to pass through are opened on both the upper and lower sides of the connecting flange to ensure the stability of the connection. A hexagonal inner hole is opened in the center of the connecting sleeve 35. The outer wall of the mandrel 28 is set as a regular hexagon matching the hexagonal inner hole and is slidably connected with the hexagonal inner hole. The connecting flange is fixedly connected to the main shaft 6 by threads. A gap M is left between the end face of the connecting sleeve 35 facing the active drill pipe 5 and the end face of the connecting shaft 27, so that the limiting section 13 can axially slide along the chuck 8, enabling the active drill pipe 5 to axially float a certain distance. The internal and external threads of the connecting shaft 27 are matched to realize the stable connection with the active drill pipe 5 and the mandrel 28. The bearing seat 33 and the housing 30 are fixedly connected by bolts. Sealing rings are sleeved between the mandrel 28 on both sides of the water inlet hole 32 and the housing 30 to realize the sealing of the drilling medium.

[0091] As Figure 4As shown, the right end of the driving drill pipe 5 is a male joint 10, and the left end is a female joint 11. A two-way joint 14 is threadedly connected to the male joint 10, and the right end of the two-way joint 14 is threadedly connected to the drill pipe. A rotation prevention portion 12 is provided on the outer periphery of the driving drill pipe 5, and the cross-section of the outer periphery of the rotation prevention portion 12 is polygonal. The end of the main shaft 6 is provided with an end cover portion, and the end cover portion includes a front end cover 7 and a chuck 8. The chuck 8 is set as a normally open chuck 8. The front end cover 7 is fixedly installed at the front end of the chuck 8 by bolts. A limiting opening is provided on the front end cover 7, and the limiting opening is a polygonal opening that cooperates with the rotation prevention portion 12. In this embodiment, the cross-section of the outer periphery of the rotation prevention portion 12 is a regular hexagon, and the limiting opening is a hexagonal inner hole. The front end cover 7 limits the rotation of the rotation prevention portion 12 through the limiting opening. When the main shaft 6 drives the end cover portion to stop rotating, the limiting opening of the front end cover 7 stops rotating synchronously, and the limiting opening limits the rotation of the rotation prevention portion 12, so that the driving drill pipe 5 can stop rotating. The above method realizes the limitation of the rotation of the driving drill pipe 5, but does not limit the axial sliding of the driving drill pipe 5, so that the driving drill pipe 5 can axially float a certain distance during the working process, which can effectively relieve the axial impact generated during the threaded connection and disassembly of the drill pipe, thereby protecting the driving drill pipe 5 and other connecting components and extending the service life of the equipment; when the driving drill pipe 5 generates axial floating, the impact force on the water braid portion 26 can be reduced, the wear of the water braid portion 26 can be reduced, and the overall durability and reliability can be improved. A limiting section 13 is provided between the female joint 11 and the rotation prevention block, and the limiting section 13 is located between the chucks 8. There is still a gap between the outer periphery of the limiting section 13 and the chucks 8 when the chucks 8 are clamped to the limit position. There is still a gap between the outer periphery of the limiting section 13 and the chucks 8 when the chucks 8 move to the limit position. The length of the limiting section 13 is greater than the length of the chucks 8, so that the clamping force of the chucks 8 will not directly act on the driving drill pipe 5, avoiding the driving drill pipe 5 directly bearing the strong clamping force of the chucks 8, avoiding the metal fatigue deformation of the driving drill pipe 5 due to force deformation during reciprocating rotation, thereby reducing fatigue damage and increasing the service life of the driving drill pipe 5; due to the axial floating design of the driving drill pipe 5, the impact force borne by the water braid portion 26 during the working process is reduced, which makes the force on the water braid portion 26 more uniform. The front end cover 7 includes a flange and an outer sleeve formed integrally, and the front end cover 7 is threadedly and fixedly connected to the chuck 8 through the flange to ensure the stability of the fixation.

[0092] As Figure 8 shown, the clamping mechanism 3 includes a base, a swinging unit, a guide sleeve assembly and a double clamping unit. As Figure 11 shown, the base is used to carry and support the gripper, which is convenient for the assembly and installation of the gripper and the drilling rig. The base includes a mounting plate 38, and a number of countersunk through holes for connecting with the frame 1 are provided on both sides of the mounting plate 38. A rear gripper mounting portion 39 and a front gripper mounting portion 45 are fixedly provided on the mounting plate 38.

[0093] As Figure 12As shown in the figure, the rear gripper mounting part 45 includes a front side plate 46, a rear side plate 47 and a rear gripper mounting position 49. A first through hole is provided in the middle of both the front side plate 46 and the rear side plate 47. A first opening is provided at the top of the front side plate 46 and the rear side plate 47. The first opening makes the top of the first through hole provided on the front side plate 46 and the rear side plate 47 open, and combines with the first through hole to form a U-shaped groove. The front side plate 46 and the rear side plate 47 are welded to the mounting plate 38 in parallel. Four rear lining plates 48 are welded or bolted between the front side plate 46 and the rear side plate 47. The rear lining plates 48 are arranged on both sides of the U-shaped groove, and respectively form a slip guiding cavity for the slip jaw assembly with the inner walls of the front side plate 46 and the rear side plate 47. The rear gripper mounting position 49 is installed on the front and rear sides of the front side plate 46 and the rear side plate 47 by bolts.

[0094] As Figure 11 shown in the figure, the front gripper mounting part 39 includes a front support plate 40 and a rear support plate 41. A flipping part is provided at the front end of the front gripper mounting part 39. Specifically, the flipping part includes two flipping plates 44. The two flipping plates 44 are respectively welded to the front ends of the front support plate 40 and the rear support plate 41. A flipping hole 43 is provided on each flipping plate 44. The front support plate 40 and the rear support plate 41 are welded to the mounting plate 38 in parallel. The front support plate 40 and the rear support plate 41 are also provided with a first through hole coaxial with the rear gripper mounting part 45. A second opening is provided at the top of the front support plate 40 and the rear support plate 41 to make the through hole open. The width of the second opening is greater than or equal to the outer diameter of the large drill tool. Reinforcing plates 42 are installed on the tops of both the front support plate 40 and the rear support plate 41 by bolts. A limiting convex block is integrally formed at the center position of the bottom of the reinforcing plate 42. The limiting convex block can be inserted into the second opening, and the bottom of the limiting convex block is tangent to the cylinder where the first through hole is located.

[0095] The swinging unit is arranged between the front support plate 40 and the rear support plate 41, and there is a gap between the bottom of the swinging unit and the mounting base plate to facilitate the swinging or flipping of the swinging unit. Specifically, the swinging unit includes a swinging body 50, a driving part 68 and a pin shaft. As Figure 13As shown in the figure, the swinging body 50 includes a swinging support plate 51. A second through hole is provided on the side wall of the swinging support plate 51, and the second through hole is coaxial with the first through hole. The cross-section of the swinging support plate 51 is in a "U" shape. Four front lining plates 53 are welded or bolted in the middle of the swinging support plate 51. Front gripper mounting positions 52 are bolted on both the front and rear sides of the swinging support plate 51. A swinging ear seat 54 is welded to the bottom of the front side of the swinging body 50. Hinge shaft seats 55 are welded to both the left and right sides of the front end of the swinging body 50. The driving member 68 is a telescopic member such as a cylinder or an oil cylinder. In this embodiment, it is an oil cylinder. The oil cylinder includes a cylinder body and an output shaft. The cylinder body is hinged to the frame 1, and the output shaft is hinged to the swinging ear seat 54. Thus, through the expansion and contraction of the output shaft of the driving member 68, the swinging body 50 is driven to rotate around the second through hole or rotate around the hinge shaft seat 55. The pin shaft is adapted to the hinge shaft seat 55. During the swinging working condition, the pin shaft is not connected to the hinge shaft seat 55.

[0096] The guide sleeve assembly includes a rear gripper guide sleeve and a front gripper guide sleeve. Both the rear gripper guide sleeve and the front gripper guide sleeve are coaxial with the first through hole. The rear gripper guide sleeve is a Figure 16 semicircular ring guide sleeve 65 as shown in the figure. The outer diameter of the semicircular ring guide sleeve 65 is divided into two levels: a small diameter section 66 and a large diameter section 67. The outer diameter of the small diameter section 66 is less than or equal to the inner diameter of the first through hole of the rear gripper mounting portion 45. A countersunk through hole is provided on the end face of the large diameter section 67, and it is screw-connected to the rear side plate 47 through the countersunk through hole. After installation, the notch direction of the semicircular ring guide sleeve 65 is the same as the opening direction of the first opening.

[0097] The front gripper guide sleeve includes two groups of guide sleeves. Each group of guide sleeves includes an inner guide sleeve 63 and an outer guide sleeve 64. As Figure 17 、 Figure 18 shown in the figure, the outer diameters of both the inner guide sleeve 63 and the outer guide sleeve 64 are divided into two levels: a small diameter section 66 and a large diameter section 67. A through hole coaxial with the inner guide sleeve 63 and the outer guide sleeve 64 is provided in the small diameter section 66. As Figure 10 shown in the figure, the outer diameter of the small diameter section 66 of the outer guide sleeve 64 is less than or equal to the inner diameter of the small diameter section 66 of the inner guide sleeve 63; the small diameter section 66 of the inner guide sleeve 63 is adapted to the second through hole provided on the swinging support plate 51, and the large diameter section 67 is adapted to the first through hole of the front support plate 40; a countersunk through hole is provided on the end face of the large diameter section 67 for installing screws. During installation, the large diameter section 67 is fixed on the swinging support plate 51 by passing screws through the countersunk through hole, realizing the axial limit of the swinging body 50.

[0098] Inner guide sleeves 63 and outer guide sleeves 64 are provided at both the front and rear ends of the front gripper 56. When the drill pipe enters or exits the gripper, the guide sleeves limit the circumferential offset of the drill pipe, ensuring that the drill pipe is always within the range that can be gripped by the gripper, while protecting the gripper and the drill rig power head from damage caused by excessive offset of the drill pipe. Since the rear gripper 57 is relatively close to the power head, the offset of the drill pipe under the action of the power head's active drill pipe 5 is small. Therefore, only one semi-circular guide sleeve 65 is required for the rear gripper 57 to adapt to drill pipes with different outer diameters.

[0099] When both the outer guide sleeve 64 and the inner guide sleeve 63 are installed, the gripper is suitable for drill pipes with a smaller outer diameter (there is generally a specific outer diameter value for a specific drill rig); when the outer guide sleeve 64 is removed and only the inner guide sleeve 63 is used, it is suitable for drill pipes with a larger outer diameter.

[0100] At the same time, the inner diameter of the outer slip 60 matches the outer diameter of the larger drill pipe applicable to the gripper, the outer diameter of the inner slip 58 is the same as the outer diameter of the larger drill pipe, and the inner diameter of the inner slip 58 matches the outer diameter of the smaller drill pipe applicable to the gripper. Combining with the quick disassembly and assembly method of the inner slip 58, during the construction process, the gripper of the present application can be applied to drill pipes with two outer diameters. However, when connecting the pin shaft to the hinge shaft seat 55, that is, in the flipping working condition, it is necessary to remove both the inner guide sleeve 63 and the outer guide sleeve 64.

[0101] During use, according to the size of the drill rod diameter, it is possible to choose to use the guide sleeve assembly simultaneously or remove the outer guide sleeve 64, or remove both the inner guide sleeve 63 and the outer guide sleeve 64, pass the pin shaft through the flipping hole 43 and connect it to the hinge shaft seat 55, so that the connection between the swing body 50 and the front gripper mounting part 39 is changed to the connection method in the flipping working condition, thereby flipping the front gripper 56 out of the base through the swing body 50 to respectively adapt to the guiding work of small-diameter drill pipes, the guiding work of large-diameter drill pipes, and the installation work of large drilling tools.

[0102] The double gripper unit includes a rear gripper 57 and a front gripper 56. Both the rear gripper 57 and the front gripper 56 include a slip assembly and a clamping oil cylinder. The slip assembly includes an inner slip 58 and an outer slip 60. As Figure 14 、 Figure 15 shown, bumps or fine teeth are provided on the inner sides of the inner slip 58 and the outer slip 60, thereby increasing the friction coefficient on the inner sides of the inner slip 58 and the outer slip 60 and reducing the probability of the drill pipe slipping.

[0103] As Figure 15 shown, the front projection of the inner slip 58 is in a "cross" shape. The main body of the cross-section in the middle section of the inner slip 58 is circular arc-shaped, and convex platforms 59 are symmetrically provided on both the upper and lower sides. The surface of the convex platform 59 facing the center of the through hole is provided with a countersunk through hole for installing and connecting the screws of the outer slip 60 and the inner slip 58; as Figure 14As shown in the figure, the inner surface of the external slip 60 is provided with a rectangular plane 61. Threaded holes are provided on the rectangular plane 61. Two blocks 62 are vertically arranged on each side of the rectangular plane 61. The surfaces of the blocks 62 close to the rectangular plane 61 form four stop surfaces, and two arc surfaces are formed by the mutual extension of the blocks 62 on the same side. The diameter of the arc surfaces matches the diameter of the larger drill pipe and the outer diameter of the internal slip 58. The combination of the arc surfaces and the four stop surfaces forms the installation space for the internal slip 58.

[0104] The front projection of the internal slip 58 is in a "cross" shape, and four positioning planes are symmetrically arranged on the left and right. Cooperating with the four stop planes corresponding to the external slip 60, the positioning of the internal slip 58 along the front and back axial directions of the holder is realized. The positioning of the internal slip 58 in the radial direction of the arc (i.e., the telescopic direction of the clamping cylinder) is realized by the screws connected to the external slip 60.

[0105] This positioning method gives full play to the advantage of high tensile strength of the threaded connection and avoids the weakness of its low shear strength, greatly reducing the possibility of deformation of the slip positioning parts.

[0106] When the internal slip 58 is severely worn or when it is necessary to replace the drill pipe with a smaller outer diameter with a drill pipe with a larger outer diameter, the internal slip 58 needs to be disassembled. Just fully retract the clamping cylinder, unscrew the connection screws between the internal slip 58 and the external slip 60, and the internal slip 58 can be removed. At this time, the outer guide sleeve 64 needs to be removed synchronously so that the guide sleeve of the front holder 56 matches the drill pipe. The installation steps are the opposite.

[0107] The clamping cylinder includes two cylinder barrels and corresponding piston rods. The two cylinder barrels are respectively connected to the rear holder installation position 49 and the front holder installation position 52 by bolts. The piston rods extend from both sides of the holder towards the center. Output shafts are welded to the piston rods, and the output shafts are bolt-connected to the external slip 60, so as to realize the clamping and loosening of the slips through the reciprocation of the piston rods.

[0108] The specific implementation process is as follows:

[0109] The brake assembly 16 is in the braking condition, the hydraulic motor cannot drive the active drill pipe 5 to rotate, and the power head can also resist the reverse torque generated by the torsional deformation of the drill pipe in the hole. It is suitable for the directional drilling condition of the drill rig. At this time, the power head does not drive the drill pipe to rotate; the brake assembly 16 is in the released condition, and the hydraulic motor drives the active drill pipe 5 to rotate forward and backward; it is suitable for the rotary drilling of the drill rig and the drill pipe connection and disconnection condition. At this time, the power head drives the drill pipe to rotate, and the hydraulic system of the chuck 8 is in the low-pressure clamping state during the drilling process; during the drilling process, if an accident such as a drill pipe fracture occurs and the drill pipe cannot be taken out, a special fishing drill tool needs to be used for fishing drilling. Make the chuck 8 in the released state, disassemble the water swivel part 26, the active drill pipe 5, and the connecting shaft 27; use the chuck 8 to clamp the fishing drill tool for drilling, and the chuck 8 is in the high-pressure clamping state.

[0110] The hydraulic system of the chuck 8 with pressure grading control function is adopted to control the clamping pressure of the chuck 8. Combined with the setting that the diameter of the limiting section 13 of the active drill pipe 5 is slightly smaller than the inner clamping diameter of the chuck 8, it not only improves the stress condition of the active drill pipe 5, but also avoids the waste of energy caused by the long-term pressure holding of the chuck 8, and also improves the adaptability of the power head to various working conditions such as normal drilling and fishing drilling.

[0111] When it is necessary to repair and replace the active drill pipe 5, since there is a receiving hole 9 in the main shaft 6 that can allow the active drill pipe 5 to pass through, the staff can directly slide the active drill pipe 5 in the receiving hole 9 and take it out from the rear of the main shaft 6, thereby improving the disassembly speed of the active drill pipe 5. At the same time, the space at the rear end of the main shaft 6 is relatively spacious. If the active drill pipe 5 is taken out from the front of the main shaft 6 according to the traditional method, on the one hand, the front end cover 7 needs to be disassembled and fastened, and on the other hand, the space at the front is relatively limited, and it is more inconvenient to install and disassemble the active drill pipe 5. The above settings can facilitate the staff to reassemble the active drill pipe 5 and then reinstall it into the main shaft 6, thereby improving the installation speed of the active drill pipe 5. By setting the brake assembly 16, the opening and closing of the active drill pipe 5 can be adjusted in a timely manner.

[0112] Since the active drill pipe 5 often needs to rotate in the reverse direction during the working process of the drill rig, the connection position between the active drill pipe 5 and the two-way joint 14 is prone to looseness. Therefore, the spot welding process can be adopted. Apply the fastening glue along the axial straight line on the male joint of the two-way joint 14, and then apply the glue symmetrically on the other side of the same male joint. When the male joint and the female joint are screwed tightly, the fastening glue at the left end of the male joint will contact the threads of the female joint for more circumferences, and the fastening glue will be smeared more widely along the screwing direction. The farther to the right, the fewer circumferences of the fastening glue contact the threads of the female joint, and the smaller the spreading degree of the smear. Therefore, when the male joint is screwed into the female joint of the active drill pipe 5, the previously linearly applied fastening glue will be smeared open, forming an approximate trapezoidal adhesive tape with a wider left side and a narrower right side in the projection on the central symmetry plane of the joint. One side of the adhesive tape is as Figure 19 shown, and the other side is similar to it. This exactly forms a complement to the strength of the thread itself, and better equalizes the strength of the threaded connection, ensuring both the reverse rotation anti-loosening strength and facilitating later disassembly. When the external thread of the male joint of the two-way joint 14 connected to the drill pipe wears to a certain extent, the two-way joint 14 can be taken off and the installation direction can be reversed, and the worn section of the two-way joint 14 and the active drill pipe 5 can be fixedly connected by glue. Since the thread of the male joint previously connected to the active drill pipe 5 is fixedly connected during work and will not wear, the reversal of the two ends of the thread is equivalent to a double-headed joint that can be used twice, and its service life is also equivalent to 2 times that of the previous integral active drill pipe 5.

[0113] Under normal construction conditions, sometimes it is necessary for the drill pipe in the front gripper 56 to have a small-angle relative rotation with the drill pipe in the rear gripper 57 or the power head. For example, to pre-loosen the drill pipe joint, and since the power head rotates at a relatively high speed, it is difficult to control the rotation angle. At this time, the front gripper 56 is not installed with a flipping pin shaft, and with the inner guide sleeve 63 as the central axis, it realizes reciprocating swing within a small angle range under the drive of the drive member 68. When the piston rod of the drive member 68 extends, the left end of the front gripper 56 drops and the right end rises; when the piston rod of the drive member 68 retracts, the left end of the front gripper 56 rises and the right end drops.

[0114] When it is necessary to install large drilling tools or when it is necessary to completely remove the swinging body 50, it is necessary to flip the swinging body 50 out of the base as a whole for easy operation. The flipping process is as follows: Install the flipping pin shaft and related pin shaft fixing parts to connect the base and the swinging body 50; Remove all the outer guide sleeves 64 and inner guide sleeves 63 at the front and rear ends of the front gripper 56; At this time, the central axis of rotation of the front gripper 56 switches to the flipping pin shaft, and the front gripper 56 can rotate around the pin shaft in the flipping hole 43 under the drive of the drive member 68; The corresponding relationship between the extension and retraction and the rotation direction of the drive member 68 is the same as that in the swinging working condition.

[0115] According to the lever principle, since the rotation fulcrum moves towards the direction of the drive member 68, when the piston rod of the drive member 68 retracts, in this working condition, the rotation amplitude of the left end of the front gripper 56 is larger than that in the normal construction situation, and the swinging body 50 can be flipped clockwise beyond the center of the base, making it almost completely exposed from the base. At this time, by removing the reinforcement plates 42 on the front and rear support plates 41 of the base, a very spacious space is formed inside and at the top of the front gripper 56, and large drilling tools can be directly placed from top to bottom.

[0116] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. Mine drill pipe installation device, including a frame, on which a power mechanism and a clamping mechanism are installed. The power mechanism is used to transmit the rotation and propulsion power required for installation and disassembly to the drill pipe, and the clamping mechanism is used to clamp the drill pipe. It is characterized in that: The power mechanism includes a main shaft, a brake assembly, a gearbox, a chuck, and a main power source. The output shaft of the main power source meshes with the gearbox to drive the main shaft to rotate. The brake assembly can perform rotational braking on the gearbox. An active drill pipe is installed at the end of the main shaft, and a receiving hole through which the active drill pipe can pass is formed inside the main shaft. A two-way joint is also detachably connected to the end of the active drill pipe. The chuck is arranged at the end of the main shaft. The clamping mechanism includes a rear chuck mounting part and a front chuck mounting part fixedly arranged on the frame. A rear chuck is arranged on the rear chuck mounting part, and a front chuck is arranged on the front chuck mounting part. Both the front chuck mounting part and the rear chuck mounting part are provided with a first through hole for the drill pipe to pass through. The front chuck can rotate around the first through hole. An opening for opening the first through hole is arranged on the side away from the frame of the first through hole. A large drill can pass through the opening. A flipping part is arranged on the side of the front chuck mounting part. The front chuck can flip around the flipping part and move away from the opening of the front chuck mounting part. Both the front chuck and the rear chuck include a clamping oil cylinder and a collet assembly. The clamping oil cylinder and the collet assembly are arranged on both sides of the first through hole. The collet assembly includes an outer collet and an inner collet. The outer collet is detachably connected to the output shaft of the clamping oil cylinder and forms a moving pair under the drive of the output shaft. The inner collet is detachably connected to the outer collet. The front projection of the inner collet is in the shape of a "plus" sign. The main body of the cross-section of the middle section of the inner collet is arc-shaped. Convex platforms are symmetrically arranged on the upper and lower sides. A counterbore through hole for connecting the screws of the outer collet and the inner collet is arranged on the surface of the convex platform facing the center of the first through hole. A rectangular plane for fitting with the convex platform of the inner collet is arranged on the inner surface of the outer collet. Threaded holes adapted to the counterbore through holes arranged on the convex platform are arranged on the rectangular plane. Two blocks are perpendicularly arranged on each side of the rectangular plane. The surfaces of the blocks close to the rectangular plane form four stop surfaces. The blocks on the same side extend towards each other to form two arc surfaces. The diameter of the arc surfaces matches the diameter of the larger drill pipe and the outer diameter of the inner collet. The combination of the arc surfaces and the four stop surfaces forms an installation space for the inner collet.

2. The mine drill pipe installation device according to claim 1, characterized in that: Both the inner surface of the inner collet and the outer surface of the outer collet are provided with a number of convex blocks or fine pointed teeth for increasing the friction with the surface of the drill pipe.

3. The mine drill pipe installation device according to claim 2, characterized in that: The front chuck further includes a swinging body. The clamping oil cylinders are installed at both ends of the swinging body. A driving member is hinged on the frame. The output shaft of the driving member is hinged at the bottom of the swinging body below the flipping part.

4. The mining drill pipe installation device according to claim 3, characterized in that: It further includes a guide sleeve assembly. The guide sleeve assembly includes a front chuck guide sleeve. The front chuck guide sleeve includes two groups of guide sleeves. A second through hole is arranged on the swinging body. The two guide sleeves are respectively detachably connected to the second through holes on both sides of the swinging body. Each group of guide sleeves includes an inner guide sleeve and an outer guide sleeve. The outer diameters of both the inner guide sleeve and the outer guide sleeve are divided into two levels: a small diameter section and a large diameter section. The small diameter section of the outer guide sleeve can be sleeved inside the small diameter section of the inner guide sleeve. The small diameter section of the inner guide sleeve is coaxial with the second through hole, and the large diameter section is coaxial with the first through hole of the front chuck mounting part.

5. The mine drill pipe installation device according to claim 4, characterized in that: The guide sleeve assembly further includes a semi-ring guide sleeve. The semi-ring guide sleeve is coaxial with the guide sleeve. The semi-ring guide sleeve is fixedly connected to the rear chuck mounting part. The notch direction of the semi-ring guide sleeve is the same as the direction of the opening.

6. The mining drill pipe installation device according to claim 5, characterized in that: The outer diameter of the semi-circular guide sleeve is divided into two levels: a small-diameter section and a large-diameter section. The outer diameter of the small-diameter section is less than or equal to the inner diameter of the first through-hole of the rear gripper mounting part, and the large-diameter section is detachably connected to the side of the rear gripper mounting part away from the front gripper mounting part.

7. The mining drill pipe installation device according to claim 6, characterized in that: The inner diameter of the semi-circular guide sleeve is greater than or equal to the outer diameter of the drill pipe.

8. The mining drill pipe installation device according to claim 7, characterized in that: The swing body includes a swing support plate with a "U"-shaped cross-section. Front gripper mounting positions are fixed at both ends of the swing support plate, and rear gripper mounting positions are fixedly arranged at both ends of the rear gripper mounting part; the clamping oil cylinder includes two cylinder barrels, which are symmetrically and fixedly installed at the front gripper mounting position and the rear gripper mounting position respectively. The output shaft is slidably arranged in the cylinder barrel and extends from both sides of the first through-hole towards the center, and the outer slip chuck is detachably connected to the output shaft of the clamping oil cylinder.

9. The mining drill pipe installation device according to claim 8, characterized in that: The swing body further includes a front lining plate, which is fixedly connected to the top of the swing support plate and forms a chuck sliding guide cavity matching the outer dimension of the outer slip chuck with the swing support plate, and the chuck assembly is slidably arranged in the chuck sliding guide cavity.

10. The mine drill pipe installation device according to claim 9, characterized in that: A swing ear seat and a hinge shaft seat corresponding to the flipping part are fixedly connected to the lower part of one side of the swing body. The swing ear seat is hinged with a driving part for driving the swing body to swing around the flipping part; the driving part is a telescopic part, one end of which is hinged with the frame and the other end is hinged with the swing ear seat.

11. The mining drill pipe installation device according to claim 10, characterized in that: It further includes a mounting plate. The rear gripper mounting part and the front gripper mounting part are both fixedly arranged on the mounting plate, and the mounting plate is fixedly connected to the frame.

12. The mining drill pipe installation device according to claim 11, wherein: The front gripper mounting part includes a front support plate and a rear support plate. The front support plate and the rear support plate are fixedly parallel on the mounting plate. The first through-hole is arranged on the front support plate and the rear support plate, and the opening is on the side of the front support plate and the rear support plate away from the mounting plate. The swing body is rotatably arranged between the front support plate and the rear support plate.

13. The mine drill pipe installation device according to claim 12, wherein: Reinforcing plates are detachably connected to the opening sides of the front support plate and the rear support plate.

14. The mining drill pipe installation device according to claim 13, characterized in that: The brake assembly includes a brake cover, a clamping piston and a releasing piston. The gearbox includes a gear shaft and multiple-stage gears. A transmission shaft connected to the gear shaft is arranged inside the brake assembly. A sliding shaft is arranged inside the brake cover. One end of the transmission shaft extends into the center of the clamping piston. Multiple first chucks are circumferentially distributed on the transmission shaft. The clamping piston is sleeved on the first chucks and can move axially. The surface of the first chuck away from the transmission shaft is an inclined surface, and the surface of the clamping piston opposite to the first chuck is a slope surface matching the inclined surface of the first chuck. The clamping piston can slide through the first chuck to clamp the transmission shaft, and the releasing piston is slidably sleeved on the sliding shaft and can push the clamping piston to release the clamping.

15. The mine drill pipe installation device according to claim 14, characterized in that: An oil inlet one and an oil inlet two are opened on the brake cover. A first oil cavity is formed between the side of the releasing piston away from the clamping piston and the brake cover. The oil inlet one can supply hydraulic oil to the first oil cavity. A second oil cavity is arranged on the side of the clamping piston away from the releasing piston. The oil inlet two can supply hydraulic oil to the second oil cavity.

16. The mine drill pipe installation device according to claim 15, characterized in that: It further includes a swivel joint part for supplying pressure fluid to the active drill pipe. The swivel joint part includes a connecting shaft, a core shaft and a water inlet assembly. Both the core shaft and the connecting shaft are 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, and a core shaft support bearing sleeved on the outer periphery of the core shaft is arranged inside the bearing seat.

17. The mine drill pipe installation device according to any one of claims 1 or 16, characterized in that: One end of the kelly is a male connector, and the other end is a female connector. The male connector is detachably connected to the bi-directional connector. The outer periphery of the kelly is provided with an anti-rotation portion, and the cross-section of the outer periphery of the anti-rotation portion is polygonal. The end of the main shaft is provided with an end cover portion, and the end cover portion includes a front end cover. The front end cover is fixed on the chuck, and a limiting opening is provided on the front end cover. The rotation of the anti-rotation portion is limited through the limiting opening on the front end cover.

18. The mine drill pipe installation device according to claim 17, wherein: A limiting section is provided between the female connector and the anti-rotation block. The limiting section is located between the chucks, and there is still a gap between the outer periphery of the limiting section when the chucks are clamped to the limit position.

19. The mine drill pipe installation device according to claim 18, wherein: The length of the limiting section is greater than the length of the chucks.

20. The mine drill pipe installation device according to claim 19, characterized in that: The end of the mandrel is provided with a water inlet hole. The water inlet assembly includes a housing, and a water supply cavity communicated with the water inlet hole is arranged inside the housing. The water supply cavity is communicated with the water inlet hole. One end of the connecting shaft close to the kelly is provided with an external thread for threaded connection with the rear end of the kelly, and one end of the connecting shaft close to the water braid portion is provided with an internal thread for threaded connection with the mandrel.

21. The mine drill pipe installation device according to claim 20, characterized in that: The water braid portion further includes a connecting sleeve, and the connecting sleeve includes a connecting flange. A kidney-shaped hole for the bolt to pass through is provided on the connecting flange. The water braid portion is fixed on the gearbox through the connecting sleeve.

22. The mine drill pipe installation device according to claim 21, wherein: A hexagonal inner hole is provided at the center of the connecting sleeve, and the outer wall of the mandrel is a regular hexagon matching with the hexagonal inner hole and is slidably connected with the hexagonal inner hole.

23. The mining drill pipe installation device according to claim 22, characterized in that: A gap is left between the end face of the connecting sleeve facing the kelly and the end face of the connecting shaft.

24. The mine drill pipe installation device according to claim 23, characterized in that: A grease nipple is provided on the bearing seat, and the grease nipple is communicated with the inside of the bearing seat.

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