Mining drill rod mounting apparatus

Abstract

The present invention relates to the technical field of coal mine drilling machines. Disclosed is a mining drill rod mounting apparatus, comprising a frame, wherein a power mechanism and a clamping mechanism are mounted on the frame; the power mechanism is used for transmitting, to a drill rod, rotation and propulsion power required for mounting and dismounting; the clamping mechanism is used for clamping the drill rod; the power mechanism comprises a main shaft, a brake assembly, a gearbox, a chuck, and a main power source; an output shaft of the main power source is engaged with the gearbox to drive the main shaft to rotate; the brake assembly is capable of performing rotating braking on the gearbox; an active drill rod is mounted at an end of the main shaft; an accommodating hole for the active drill rod to pass through is formed in the main shaft; an end of the active drill rod is further detachably connected to a bidirectional joint; the chuck is arranged at the end of the main shaft. The technical solution of the present invention is conducive to dismounting of the active drill rod, and can improve the construction efficiency.

Description

Mining drill rod installation device TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine drilling machine, in particular to a mining drill rod installation device. BACKGROUND

[0002] The power head and the gripper are important components of the mining drill rod installation device, the power head is used to transmit the rotation and propulsion power required for the installation and removal of the drill rod, and the gripper is mainly responsible for the clamping task of the drill rod, and cooperates with the power head to realize the connection and unloading of the drill rod joint, and at the same time ensures that the drill rod will not slip off, the drill rod usually includes ordinary drill rod and large drill such as hole bottom motor.

[0003] The existing automatic drilling machine usually adopts a driving drill rod to connect the power head and the drill rod, in order to enable a power head to use drill rods with different outer diameters, in recent years, a drill rod connecting mechanism of chuck and driving drill rod composite type has appeared, the driving drill rod is fixedly connected to the front end of the chuck, by installing and removing the driving drill rod, the use of the driving drill rod and the chuck is switched, so as to achieve the purpose of clamping drill rods with different outer diameters.

[0004] The existing directional drilling machine power head includes a main motor, a transmission, a main shaft, a driving drill rod and a water braid, the transmission has a drive shaft, one end of the drive shaft is connected to the main motor, and the drive shaft is in meshing transmission with the main shaft through the gears in the transmission, one end of the main shaft is fixedly connected with the driving drill rod in the circumferential direction, the other end of the drive shaft is connected with an angle adjuster through the transmission, so that the directional drilling machine power head has the functions of high-efficiency and accurate tool face adjustment and main motor braking; the core shaft in the water braid is connected with the driving drill rod with axial floating structure through a connecting shaft, and a connecting sleeve forming a hexagonal sleeve sliding pair with the connecting shaft is arranged at one end of the main shaft close to the water braid, so that the core shaft support bearing is free from axial impact during drilling, thereby prolonging the service life and reducing the equipment maintenance frequency.

[0005] However, the above technical solution has the following disadvantages: when the driving drill rod needs to be replaced, the end cover for fixing the driving drill rod needs to be removed from the front end first, and then the driving drill rod needs to be unlocked from the connecting shaft, so that the driving drill rod 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 generally located in the middle of the drilling machine, it is not convenient to pull out the driving drill rod, which may affect the construction efficiency. SUMMARY

[0006] The present application aims to provide a mining drill rod installation device to facilitate the disassembly of the driving drill rod, and at the same time, to improve the construction efficiency.

[0007] In order to achieve the above object, the present application adopts the following technical scheme: the mining drill rod installation device comprises a rack, a power mechanism and a clamping mechanism are installed on the rack, the power mechanism is used for transmitting the rotation and propulsion power required for the drill rod assembly and disassembly, the clamping mechanism is used for clamping the drill rod, the power mechanism comprises a main shaft, a brake assembly, a gearbox, a chuck and a main power source, the output shaft of the main power source is engaged with the gearbox to drive the main shaft to rotate, the brake assembly can rotate the gearbox, the main shaft end is provided with a main drive drill rod, the main shaft is provided with a containing hole for the main drive drill rod to pass through, and the main drive drill rod end is detachably connected with a bidirectional connector, and the chuck is arranged at the main shaft end.

[0008] The beneficial effects of the present scheme are: the brake assembly can rotate the gearbox, cooperate with the directional drilling of the drilling machine and the drill rod connection and disconnection condition, when the main drive drill rod needs to be repaired and replaced, since the main shaft is provided with a containing hole for the main drive drill rod to pass through, the staff can directly slide the main drive drill rod in the containing hole from the rear of the main shaft to take out, thereby improving the speed of disassembling the main drive drill rod, and the space at the rear end of the main shaft is relatively spacious, if the main drive drill rod is taken out from the front of the main shaft according to the traditional method, on the one hand, the flange plate needs to be disassembled and fastened, on the other hand, the space in the front part is limited, and it is inconvenient to install and disassemble the main drive drill rod, the above setting can conveniently assemble the main drive drill rod and reassemble it into the main shaft, thereby improving the installation speed of the main drive drill rod, and the brake assembly can timely adjust the opening and closing of the main drive drill rod.

[0009] Since the main drive drill rod often needs to rotate in reverse during the operation of the drilling machine, the connection position of the main drive drill rod and the bidirectional connector is prone to loosening, the point gluing process can be used, the fastening glue is coated on the male connector of the bidirectional connector along the axial straight line, and the same fastening glue is symmetrically coated on the other side of the male connector. When the male connector and the female connector are screwed, the fastening glue at the left end of the male connector will contact with more threads of the female connector, and the fastening glue will be spread more widely in the screwing direction. The farther to the right, the less the fastening glue contacts with the threads of the female connector, and the smaller the spreading degree of the fastening glue. Therefore, when the male connector is screwed into the female connector of the main drive drill rod, the straightly coated fastening glue will be spread, forming a nearly trapezoidal glue tape on the central symmetric plane of the connector. This is complementary to the stress of the thread itself, which better homogenizes the strength of the thread connection, ensures the anti-loosening strength of the reverse rotation, and facilitates the disassembly in the later period. When the male connector of the bidirectional connector is connected with the external thread of the drill rod and is worn to a certain extent, the bidirectional connector can be taken down and installed in the opposite direction, and the worn part of the bidirectional connector is fixedly connected with the main drive drill rod by glue. Since the thread of the male connector connected with the main drive drill rod is fixedly connected in the work and will not be worn, the two-end thread adjustment is equivalent to the use of the bidirectional connector twice, and the service life is equivalent to twice that of the previous integral main drive drill rod.

[0010] Further, the clamping mechanism comprises a rear clamping device mounting portion and a front clamping device mounting portion fixedly arranged on the rack, the rear clamping device mounting portion is provided with a rear clamping device, the front clamping device mounting portion is provided with a front clamping device, the front clamping device mounting portion and the rear clamping device mounting portion are both provided with a first through hole through which the drill rod passes, the front clamping device can rotate around the through hole, the first through hole is provided with an opening away from the rack, through which the large drill tool can pass, and the front clamping device mounting portion is provided with a turnover portion on the side surface, the front clamping device can be turned away from the opening of the front clamping device mounting portion around the turnover portion.

[0011] The front clamping device has two working conditions, a swing working condition: in the normal construction condition, the front clamping device takes the first through hole as the rotation axis, at this time, the front clamping device and the rear clamping device can rotate relative to each other, so that the drill rod in the front clamping device and the drill rod in the rear clamping device or the power head produce a small angle of relative rotation (such as pre-loosening the drill rod joint), and the pre-loosening work of the drill rod is completed; a turnover working condition: when the large drill tool needs to be installed or the front clamping device needs to be removed as a whole, the front clamping device needs to be turned over as a whole out of the front clamping device mounting portion, so that the operation can be performed, at this time, the turnover portion is taken as the rotation axis, after the front clamping device is turned over out of the front clamping device mounting portion, since the first through holes of the front clamping device mounting portion and the rear clamping device mounting portion are both provided with openings, the first through hole away from the rack side is in an open state, the axis of the large drill tool can be directly parallel to the drilling axis, and the large drill tool can be directly placed in the rear clamping device through the opening, the installation work of the large drill tool is completed, after the installation of the large drill tool is completed, the front clamping device is turned over to the original position, the connection structure of the swing working condition is restored, it is not necessary to adjust the up and down inclination angles of the inner hole axis of the clamping device multiple times as in the first scheme, and it is not necessary to remove the clamping device as a whole as in the second scheme, a large amount of manpower and construction time are saved, and the installation process is simple and fast.

[0012] Further, the front clamping device and the rear clamping device both comprise a clamping oil cylinder and a slip assembly, the clamping oil cylinder and the slip assembly are arranged on both sides of the first through hole, the slip assembly comprises an outer slip and an inner slip, the outer slip is detachably connected with the output shaft of the clamping oil cylinder and forms a moving pair under the drive of the output shaft, and the inner slip is detachably connected with the outer slip.

[0013] The beneficial effect of the present scheme is that the clamp holder generally adopts the structure form of the slip seat surface mounting slip, and after assembly, it can only be used for clamping one type of drill pipe. If it needs to be used for other types of drill pipes such as large drill pipes and fishing drill pipes, complex slip dismounting and slip changing operations must be performed, which will consume a lot of time. Therefore, the existing drilling rig clamp holder is also difficult to adapt to different specifications of drill pipes. The present scheme can simultaneously adapt to two types of drill pipes through the design of the inner slip and the outer slip. When the inner slip is severely worn or needs to be replaced from a smaller outer diameter drill pipe to a larger outer diameter drill pipe, the inner slip needs to be dismounted. Only the output shaft is fully retracted, the connecting screw between the inner slip and the outer slip is unscrewed, and then the inner slip can be dismounted. When the inner slip is installed, only the new inner slip is fixed on the outer slip, which greatly simplifies the slip dismounting and slip changing operation process, reduces the operation time, and improves the construction efficiency.

[0014] Further, the inner slip is a "cross" shape in front view, and the middle section of the inner slip is a circular arc shape, and symmetrically provided with bosses on the upper and lower sides, and one side of the boss facing the center of the No. 1 through hole is provided with a countersunk through hole for mounting the screw connecting the outer slip and the inner slip; the inner surface of the outer slip is provided with a rectangular plane matched with the boss of the inner slip, and the rectangular plane is provided with a threaded hole matched with the countersunk through hole of the boss, and two clamping blocks are vertically arranged on the two sides of the rectangular plane, and the side close to the rectangular plane of the clamping block forms four stop surfaces; the clamping blocks on the same side extend to each other to form two circular arc surfaces, and the diameter of the circular arc surface matches the diameter of the larger drill pipe and the outer diameter of the inner slip; the circular arc surface and the four stop surfaces combine to form an inner slip mounting space.

[0015] The beneficial effect of the present scheme is that the inner slip is a "cross" shape in front view, and symmetrically provided with four positioning planes, and the positioning planes cooperate with the four stop planes of the outer slip to realize the positioning of the inner slip along the front and rear axial direction of the clamp holder. The positioning of the inner slip in the circular arc radial direction (i.e. the extension direction of the clamping oil cylinder) is realized by the screw connected with the outer slip.

[0016] This positioning method takes advantage of the high tensile strength of the threaded connection, and at the same time avoids the weak shear strength, reducing the possibility of deformation of the slip positioning part.

[0017] Further, the inner surface of the inner slip and the outer slip is provided with a plurality of protrusions or small teeth for increasing the friction with the surface of the drill pipe.

[0018] The beneficial effect of the present scheme is that by setting the protrusions or small teeth for increasing the friction with the surface of the drill pipe, the probability of drill pipe slipping is reduced, and the work efficiency during installation or dismounting is improved.

[0019] Further, the front holder further comprises a swing body, the clamping oil cylinder is installed at two ends of the swing body, a driving member is hinged on the frame, and an output shaft of the driving member is hinged at the bottom of the swing body below the turnover part.

[0020] The beneficial effects of the scheme are that, due to the arrangement of the driving member, the swing body is conveniently driven to swing or turn over.

[0021] Further, the guide sleeve assembly comprises a front holder guide sleeve, the front holder guide sleeve comprises two groups of guide sleeves, the swing body is provided with a second through hole, the two guide sleeves are respectively detachably connected to the second through hole on the two sides of the swing body, each group of guide sleeves comprises an inner guide sleeve and an outer guide sleeve, the outer diameters of the inner guide sleeve and the outer guide sleeve are divided into two levels of small-diameter sections and large-diameter sections, and the small-diameter section of the outer guide sleeve can be sleeved in 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 holder mounting part.

[0022] The beneficial effects of the scheme are that, in the working process of the holder, the drill rod needs to be continuously entered and exited from the holder, and because the slip assemblies on the two sides of the holder need to be frequently opened and closed, the distance is often changed, so the holder itself generally does not have a guide function. Therefore, a guide sleeve is generally specially arranged in front of the holder for guiding the drill rod to enter and exit the holder, so as to prevent the drill rod from deviating from the axis and causing damage to the holder and the power head. In the traditional drilling rig structure, the holder and the guide sleeve are generally arranged as two independent components at the front end of the frame, occupying a large length space. Some drilling rigs used in narrow spaces or compact structures cancel the guide sleeve to save space in the drilling direction. The inner sleeve of the traditional guide sleeve is a hollow cylinder that can rotate, and one inner sleeve can only adapt to one diameter of the drill rod. After the drilling rig changes the diameter of the drill rod, the guide sleeve or the inner sleeve must be replaced in order to adapt to the outer diameter of the new drill rod. The overall replacement of the guide sleeve is relatively simple, but the cost of spare parts is relatively high; the replacement of the inner sleeve is relatively complex, but the cost is low, which is the current way generally used in the field. However, the replacement of the inner sleeve also has a problem of difficult identification and management of accessories. Because several drill rod specifications used in the same drilling rig are close to each other, the diameter difference of the drill rod is generally about 10 mm, and the thickness difference of the inner sleeve is only a few millimeters. It is very difficult to identify such a small gap without measuring tools in the field, and the management of accessories in the field is also difficult. At the same time, because the guide sleeve and the holder are two independent components, the installation space requirement is large, which leads to a long frame of the drilling rig, and the guide sleeve can only be used for one type of drill rod, which is difficult to replace in the field.

[0023] The inner guide sleeve and the outer guide sleeve are arranged, so as to adapt to two specifications of drill rods; meanwhile, the guide sleeves are fixed on the swing body, as the connecting point of the swing body and the front holder installation position in the normal construction state, when the overturning is needed, only the guide sleeves are disassembled, the position of the swing body and the front holder in the rotation connection is converted to the axis of the overturning hole, so that the working condition switching is completed, and the operation is simple; in addition, the guide sleeves and the holder are combined as a whole, the requirement for the installation space is reduced, the overall layout of the drilling rig is more compact; meanwhile, the inner guide sleeve and the outer guide sleeve are two parts with obvious structural differences, so that the on-site accessory management and identification are facilitated.

[0024] Further, the guide sleeve assembly further comprises a semi-ring guide sleeve, the semi-ring guide sleeve is coaxial with the guide sleeve, the semi-ring guide sleeve is fixedly connected with the rear holder installation part, and the gap direction of the semi-ring guide sleeve is the same as the opening direction.

[0025] The beneficial effects of the scheme are that: by arranging the semi-ring guide sleeve on the rear holder installation part, and arranging the semi-ring guide sleeve gap direction to be the same as the opening direction of the first through hole, the rear holder is in an open state, when the drill rod is installed or disassembled, the drill rod can be inserted from one end of the first through hole, or the drill rod can be directly placed into the rear holder from the open part, so that the installation and disassembly efficiency of the drill rod is improved.

[0026] Further, the outer diameter of the semi-ring guide sleeve is divided into two levels of small-diameter sections and large-diameter sections, the small-diameter section has an outer diameter less than or equal to the inner diameter of the first through hole of the rear holder installation part, and the large-diameter section is detachably connected with the side of the rear holder installation part away from the front holder installation part.

[0027] The beneficial effects of the scheme are that: when connected, the screws are all located in the countersunk holes, on the one hand, the appearance of the equipment can be improved, and on the other hand, the problems such as screw loosening caused by vibration during the operation of the drilling rig can be reduced; in addition, the screws are located in the countersunk through holes, so that the problems such as collision and damage between the drill rod and the screw head during the installation or disassembly of the drill rod can be reduced.

[0028] Further, the inner diameter of the semi-ring guide sleeve is greater than or equal to the outer diameter of the drill rod.

[0029] The beneficial effects of the scheme are that: by arranging the inner diameter of the semi-ring guide sleeve to be greater than or equal to the outer diameter of the drill rod, the inner diameter of the semi-ring guide sleeve can match the drill rods with different outer diameters of the drilling rig, and the drill rod is loaded into the holder from the top opening.

[0030] Further, the swing body includes a swing support plate in the shape of a "N" in cross section, both ends of the swing support plate are fixed with front gripper mounting positions, both ends of the rear gripper mounting part are fixedly provided with rear gripper mounting positions; the clamping oil cylinder includes two cylinder barrels, the cylinder barrels are respectively and symmetrically fixedly installed on the front gripper mounting positions and the rear gripper mounting positions, an output shaft is slidably arranged in the cylinder barrel and extends to the center from both sides of the No. 1 through hole, and the outer slip bowl is detachably connected with the output shaft of the clamping oil cylinder.

[0031] The beneficial effects of the present scheme are: 1. Structural stability: the swing support plate in the shape of a "N" in cross section provides a solid support foundation, enhancing the rigidity and stability of the entire gripper system, 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, improving the availability and economy of the equipment; 3. The piston rod of the clamping oil cylinder extends to the center from both sides of the No. 1 through hole and is fixedly connected with the output shaft. This design ensures the synchronization and precise control of the clamping action, which is beneficial to accurately perform the clamping and releasing actions of the drill pipe. At the same time, by symmetrically fixing the clamping oil cylinder on the front gripper mounting position and the rear gripper mounting position, uniform distribution of clamping force is achieved, improving clamping accuracy and stability and reducing the risk of drill pipe deflection or slipping during operation.

[0032] Further, the swing body further includes a front backing plate fixedly connected to the top of the swing support plate and forming a slip bowl sliding guide cavity matching the outer shape and size of the outer slip bowl, and the slip bowl assembly is slidably arranged in the slip bowl sliding guide cavity.

[0033] The beneficial effects of the present scheme are: through the restriction and guiding effect of the slip bowl sliding guide cavity, the sliding of the clamping oil cylinder piston rod is always stable, reducing the wear of the piston rod.

[0034] Further, a swing ear seat and a hinge shaft seat corresponding to the turnover part are fixedly connected to one side of the swing body, and a driving member for driving the swing body to swing around the turnover part is hingedly connected to the swing ear seat.

[0035] The beneficial effects of the present scheme are: the swing body is driven to rotate and turn by the telescopic driving member, and the operator only needs to replace the corresponding parts when switching the working conditions, reducing the labor input and improving the automation of the equipment.

[0036] Further, an installation plate is provided, the rear gripper mounting part and the front gripper mounting part are fixedly arranged on the installation plate, and the installation plate is fixedly connected with the rack.

[0037] The beneficial effects of the scheme are that the rear gripper mounting part and the front gripper mounting part are fixedly arranged on the mounting plate to form a base, and the swing body and the rear gripper are mounted on the base, facilitating subsequent maintenance.

[0038] Further, the front gripper mounting part comprises a front support plate and a rear support plate, the front support plate and the rear support plate are fixedly arranged on the mounting plate in parallel, a No. 1 through hole is arranged on the front support plate and the rear support plate, an opening is arranged on the side of the front support plate and the rear support plate away from the mounting plate, and the swing body is rotatably arranged between the front support plate and the rear support plate.

[0039] Further, the opening side of the front support plate and the rear support plate is detachably connected with a reinforcing plate.

[0040] The beneficial effects of the scheme are that the design of the reinforcing plate effectively reduces the reduction of the structural strength of the front support plate and the rear support plate caused by the single-sided opening, and at the same time, the detachable connection mode can also detach the reinforcing plate when installing large drilling tools or maintaining, avoiding the influence of the reinforcing plate on the installation of large drilling tools or the maintenance work of the drill pipe.

[0041] Further, the brake assembly comprises a brake cover, a clamping piston and a loosening piston, the gearbox comprises a gear shaft and multiple gear stages, the brake assembly is internally provided with a transmission shaft connected with the gear shaft, the brake cover is internally provided with a sliding shaft, one end of the transmission shaft extends into the center of the clamping piston, the transmission shaft is circumferentially provided with multiple slips, the clamping piston is sleeved on the slip and can move in the axial direction, the surface of the slip away from the transmission shaft is a slope, and the surface of the clamping piston opposite to the slip is a slope surface matched with the slope of the slip, the clamping piston can slide through the slip to clamp the transmission shaft, and the loosening piston is slidably sleeved on the sliding shaft and can push the clamping piston to release the clamping.

[0042] The beneficial effects of the scheme are that the surface of the clamping piston opposite to the slip is a slope surface matched with the slope of the slip, the clamping piston can slide to make the slope surface in the clamping piston contact with the slope of the slip, the transmission shaft is clamped through the radial movement of the slip, and the rotation of the transmission shaft is limited, the clamping and loosening of the transmission shaft are realized through the axial sliding of the clamping piston and the radial movement of the slip, the cooperation of the slope and the slope surface provides stable clamping force, ensures that the transmission shaft will not slide in the working process, ensures the reliability of clamping the transmission shaft, and can adapt to transmission shafts of different diameters, even if the surface of the transmission shaft is worn, stable clamping can also be realized through the extension of the sliding distance of the clamping piston, has strong universality, and can be applied to various types of drilling power heads.

[0043] Further, the brake cover is provided with an oil inlet one and an oil inlet two, the first oil cavity is formed between the release piston and the brake cover away from the clamping piston side, the oil inlet one can provide hydraulic oil to the first oil cavity, the second oil cavity is arranged on the side of the clamping piston away from the release piston, and the oil inlet two can provide hydraulic oil to the second oil cavity.

[0044] The beneficial effects of the scheme are: the pressure oil enters the second oil cavity from the oil inlet two, pushes the clamping piston to move towards the side close to the slip one, so that the internal slope surface contacts the inclined surface of the slip one, thus pushing the slip one to move inward and limiting the radial displacement of the slip one, thereby clamping the transmission shaft to realize the brake of the transmission shaft; the pressure oil enters the first oil cavity from the oil inlet one, pushes the release piston to move, and the end surface of the release piston pushes the clamping piston to move away from the slip one, thereby releasing the radial displacement limitation of the slip one and the rotation limitation of the transmission shaft. The automatic control of the brake assembly is realized through the hydraulic system, the automation level and efficiency of the operation are improved, the hydraulic system can provide stable and adjustable pressure to ensure the accuracy of the clamping and releasing process, and the hydraulic system has high stability and reliability, which ensures that the brake assembly can work stably under various working conditions and reduces the failure rate and maintenance cost.

[0045] Further, the water braid part for providing pressure fluid to the driving drill rod is further provided, the water braid part comprises a connecting shaft, a core shaft and a water inlet assembly, 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 with the driving drill rod, the core shaft is communicated and rotationally connected with the water inlet assembly, a bearing seat is arranged to support the core shaft, and a core shaft support bearing is arranged in the bearing seat and sleeved on the outer periphery of the core shaft.

[0046] The beneficial effects of the scheme are: by arranging the connecting shaft and the water braid part, the core shaft is fixedly connected and communicated with the connecting shaft, the other end of the connecting shaft is connected with the driving drill rod, the drilling medium flowing into the water braid part is transmitted to the driving drill rod, and the driving drill rod and the water braid part are connected. In the technical scheme, the core shaft is connected with the driving drill rod and rotates together with the driving drill rod during the working process, and the core shaft support bearing can ensure smooth rotation of the core shaft, reduce friction and wear during rotation, and prolong the service life of the equipment. Through the hollow design of the connecting shaft and the core shaft, the pressure fluid can be smoothly transmitted from the water inlet assembly to the driving drill rod, so that the drilling medium can be stably and continuously supplied, and the drilling efficiency is improved.

[0047] Further, one end of the driving drill rod is a male joint, the other end is a female joint, the male joint is detachably connected with the bidirectional joint, a rotation stopping part is arranged on the outer periphery of the driving drill rod, the outer periphery cross section of the rotation stopping part is polygonal, an end cover part is arranged on the end part of the main shaft, the end cover part comprises a front end cover, the front end cover is fixed on the chuck, a limiting opening is arranged on the front end cover, and the rotation of the rotation stopping part is limited through the limiting opening.

[0048] The beneficial effects of the scheme are: when the main shaft drives the end cover part to stop rotating, the limiting hole of the front end cover synchronously stops rotating, the limiting hole limits the rotation of the rotation stopping part, and then the driving drill rod can stop rotating, the above-mentioned mode realizes the limitation of the rotation of the driving drill rod, but does not limit the axial sliding of the driving drill rod, so that the driving drill rod can axially float a certain distance in the working process, which can effectively alleviate the axial impact generated in the threaded connection and disassembly process of the drill rod, thereby protecting the driving drill rod and other connecting components and prolonging the service life of the equipment; when the driving drill rod axially floats, the impact force on the water braid part can be reduced, the wear of the water braid part is reduced, and the overall durability and reliability thereof are improved.

[0049] Further, a limiting section is arranged between the female joint and the rotation stopping block, and the limiting section is located between the chucks.

[0050] The beneficial effects of the scheme are: when the chuck moves to the limit position, there is still a gap between the outer periphery of the limiting section and the chuck, so that the limiting section can axially slide along the chuck, the driving drill rod can axially float a certain distance, and the clamping force of the chuck does not directly act on the driving drill rod, thereby avoiding that the driving drill rod directly bears the strong clamping force of the chuck and avoiding that the stress deformation of the driving drill rod causes metal fatigue deformation in the reciprocating rotation process, thereby reducing 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 in the working process is reduced, which makes the stress borne by the water braid part more uniform.

[0051] Further, the length of the limiting section is greater than the length of the chuck.

[0052] The beneficial effects of the scheme are: the length of the limiting section is greater than the length of the chuck, so that the driving drill rod has a certain floating distance in the chuck, so as to alleviate the axial impact generated when the driving drill rod is connected or disconnected with the drill rod, thereby playing a role in protecting the driving drill rod.

[0053] Further, the end of the mandrel is provided with a water inlet hole, the water inlet assembly comprises a shell, a water supply cavity in communication with the water inlet hole is arranged in the shell, the water supply cavity is in communication with the water inlet hole, an outer thread for thread connection with the rear end of the driving drill rod is arranged on the end of the connecting shaft close to the driving drill rod, and an inner thread for thread connection with the mandrel is arranged on the end of the connecting shaft close to the water braid part.

[0054] The beneficial effects of the scheme are: since the outer thread for thread connection with the rear end of the driving drill rod is arranged on the end of the connecting shaft close to the driving drill rod, and the inner thread for thread connection with the mandrel is arranged on the end of the connecting shaft close to the water braid part, the mandrel and the driving drill rod can be connected at both ends of the connecting shaft.

[0055] Further, the water braid part further comprises a connecting sleeve, the connecting sleeve comprises a connecting flange, the connecting flange is provided with a waist-shaped hole for the bolt to pass through, and the water braid part is fixed on the gearbox through the connecting sleeve.

[0056] The beneficial effects of the present scheme are that the waist-shaped hole is arranged on the connecting flange, and the bolt is used for fixing, so that the connecting sleeve can be conveniently disassembled by the staff.

[0057] Further, the center of the connecting sleeve is provided with a hexagonal inner hole, and the outer wall of the mandrel is a regular hexagon matched with the hexagonal inner hole and is in sliding connection with the hexagonal inner hole.

[0058] The beneficial effects of the present scheme are that the hexagonal inner hole in the center of the connecting sleeve forms a moving pair with the mandrel, so that the relative rotation of the mandrel and the gearbox is limited.

[0059] Further, the end face of the connecting sleeve facing the driving drill rod and the end face of the connecting shaft are left with a gap.

[0060] The beneficial effects of the present scheme are that the gap between the end face of the connecting sleeve facing the driving drill rod and the end face of the connecting shaft enables the limiting section to axially slide along the chuck, so that the driving drill rod can axially float for a certain distance.

[0061] Further, the bearing seat is provided with a grease nipple, and the grease nipple is in communication with the inside of the bearing seat.

[0062] The beneficial effects of the present scheme are that the grease nipple can provide lubricating oil for the mandrel support bearing, maintain the lubrication of the mandrel support bearing, reduce the friction of the bearing under high load conditions, prolong the service life of the bearing, effectively lubricate to reduce the wear and heat accumulation of the bearing, avoid damage of the bearing due to overheating, and improve the reliability and durability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0063] Fig. 1 is a structural schematic view of the mine drill rod installation device in the present application;

[0064] Fig. 2 is a sectional view of the power mechanism in the present application;

[0065] Fig. 3 is a detail view of the brake assembly in the present application;

[0066] Fig. 4 is a detail view of the driving drill rod in the present application;

[0067] Fig. 5 is a detail view of the water braid part in the present application;

[0068] Fig. 6 is a connecting schematic view of the water braid part in the present application;

[0069] Fig. 7 is a right view of the connecting sleeve in the present application;

[0070] Fig. 8 is a three-dimensional view of the clamping mechanism in the present application;

[0071] Figure 9 is a front view of the clamping mechanism of the present application;

[0072] Figure 10 is a sectional view of A-A in Figure 9;

[0073] Figure 11 is a three-dimensional view of the base of the present application;

[0074] Figure 12 is a three-dimensional view of the base of the present application after the reinforcing plate is removed;

[0075] Figure 13 is a three-dimensional view of the swing body of the present application;

[0076] Figure 14 is a three-dimensional view of the outer slip of the present application;

[0077] Figure 15 is a three-dimensional view of the inner slip of the present application;

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

[0079] Figure 17 is a three-dimensional view of the outer guide sleeve of the present application;

[0080] Figure 18 is a schematic view of the inner guide sleeve of the present application;

[0081] Figure 19 is a schematic view of the adhesive of the bidirectional joint of the present application. DETAILED DESCRIPTION

[0082] The following will be further described in detail through specific embodiments:

[0083] The reference signs in the drawings of the specification include: frame 1, power mechanism 2, clamping mechanism 3, main power source 4, main drive rod 5, main shaft 6, front end cover 7, chuck 8, accommodating hole 9, male joint 10, female joint 11, rotation-stopping part 12, limiting section 13, bidirectional joint 14, gearbox 15, brake assembly 16, brake cover 17, clamping piston 18, loosening piston 19, sliding shaft 20, slip 21, transmission shaft 22, oil inlet 23, oil inlet 24, key 25, water braid part 26, connecting shaft 27, mandrel 28, housing 30, water supply cavity 31, water inlet hole 32, bearing seat 33, mandrel support bearing 34, connecting sleeve 35, waist-shaped hole 36, grease nipple 37, mounting plate 38, front clamping device mounting part 39, front support plate 40, rear support plate 41, reinforcing plate 42, turnover hole 43, turnover plate 44, rear clamping device mounting part 45, front side plate 46, rear side plate 47, rear lining plate 48, rear clamping device mounting position 49, swing body 50, swing support plate 51, front clamping device mounting position 52, front lining plate 53, swing ear seat 54, hinged shaft seat 55, front clamping device 56, rear clamping device 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 rod mounting device is basically shown in Figs. 1-19.

[0086] The mining drill rod mounting device shown in Fig. 1 comprises a frame 1, a power mechanism 2 and a clamping mechanism 3 mounted on the frame 1, the power mechanism 2 is used to transmit the rotation and thrust power required for the mounting and dismounting of the drill rod, and the clamping mechanism 3 is used to clamp the drill rod.

[0087] As shown in Figs. 1-2, the power mechanism 2 comprises 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 is engaged with the gearbox 15 to drive the main shaft 6 to rotate, the main power source 4 can be various rotating power driving devices, such as hydraulic motor, electric motor, etc., the main power source 4 of the present application is a hydraulic motor, the gearbox 15 comprises a gear shaft and multiple gear stages, the brake assembly 16 is internally provided with a transmission shaft 22 connected with the gear shaft, the transmission shaft 22 is connected with the gear shaft through a key 25 and rotates synchronously, the brake assembly 16 rotates and brakes the transmission shaft 22, the main shaft 6 is provided at the end with a driving drill rod 5, and the main shaft 6 is internally provided with a receiving hole 9 through which the driving drill rod 5 can pass.

[0088] As shown in Fig. 3, the brake assembly 16 comprises a brake cover 17, a clamping piston 18 and a loosening piston 19, the brake cover 17 is internally provided with a sliding shaft 20, the left end of the transmission shaft 22 extends into the center of the clamping piston 18, the transmission shaft 22 is circumferentially provided with multiple slips 21, the number of the slips 21 in the present embodiment is three, the clamping piston 18 is sleeved outside the slips 21 and can move axially along the transmission shaft 22, the surface of the slip 21 away from the transmission shaft 22 is a bevel surface, the surface opposite to the slip 21 of the clamping piston 18 is a slope surface matched with the bevel surface of the slip 21, the clamping piston 18 can slide to push the slip 21 to slide radially to clamp the transmission shaft 22, and the loosening piston 19 is slidably sleeved on the sliding shaft 20 and can push the clamping piston 18 to release the clamping. The surface opposite to the slip 21 of the clamping piston 18 is a slope surface matched with the bevel surface of the slip 21, the clamping piston 18 can slide to make the slope surface in its interior contact with the bevel surface of the slip 21, the transmission shaft 22 is clamped through the radial movement of the slip 21, and the rotation of the transmission shaft 22 is limited, the transmission shaft 22 is quickly clamped and loosened through the axial sliding of the clamping piston 18 and the radial movement of the slip 21, the cooperation of the bevel surface and the slope surface provides stable clamping force, ensures that the transmission shaft 22 will not slide during the working process, ensures the reliability of the clamping of the transmission shaft 22, and can adapt to transmission shafts 22 of different diameters, even if the surface of the transmission shaft 22 is worn, stable clamping can be achieved through the extension of the sliding distance of the clamping piston 18, and the device has strong versatility.

[0089] As shown in Figure 3, the brake cover 17 is provided with an oil inlet one 23 and an oil inlet two 24, loosening the piston 19 away from the clamping piston 18 side and the brake cover 17 form a first oil chamber, the oil inlet one 23 can provide hydraulic oil to the first oil chamber, the clamping piston 18 away from the loosening piston 19 side is provided with a second oil chamber, the oil inlet two 24 can provide hydraulic oil to the second oil chamber, the inner wall and the outer wall of the loosening piston 19 are provided with a sealing ring, the outer wall of the clamping piston 18 is also provided with a sealing ring, the sealing ring can effectively prevent the hydraulic oil from leaking, and ensure that the pressure in the hydraulic structure remains stable. The pressure oil enters the second oil chamber from the oil inlet two 24, pushes the clamping piston 18 to move to the left side, so that the inner slope surface of the clamping piston 18 contacts with the inclined surface of the slip one 21, thus pushing the slip one 21 to move inward, and limiting the radial displacement of the slip one 21, so as to clamp the transmission shaft 22, and realize the brake of the transmission shaft 22; the pressure oil enters the first oil chamber from the oil inlet one 23, pushes the loosening piston 19 to move, the end surface of the loosening piston 19 pushes the clamping piston 18 to move to the right side, and releases the radial displacement limitation of the slip, so as to release the rotation limitation of the transmission shaft 22, through the hydraulic pressure, the automatic control of the brake assembly 16 is realized, the automation level and the efficiency of the operation are improved, the hydraulic pressure can provide stable and adjustable pressure, ensures the accuracy of the clamping and loosening process, and the hydraulic pressure has high stability and reliability, ensures that the brake assembly 16 can work stably under various working conditions, reduces the failure rate and the maintenance cost.

[0090] The water braid 26 for supplying pressure fluid to the driving drill rod 5 is also included, as shown in Figures 5 and 6, and the water braid 26 includes a connecting shaft 27, a connecting sleeve 35, a mandrel 28, a bearing seat 33 and a water inlet assembly, the mandrel 28 and the connecting shaft 27 are both hollow shafts, the mandrel 28 is fixedly connected with the connecting shaft 27 and in communication, the other end of the connecting shaft 27 is connected with the driving drill rod 5, the mandrel 28 is in communication with the water inlet assembly and is rotatably connected, the bearing seat 33 is used for supporting the mandrel 28, and the bearing seat 33 is internally provided with a mandrel supporting bearing 34 sleeved on the outer periphery of the mandrel 28. The water inlet assembly includes a shell 30, the shell 30 is internally provided with a water supply cavity 31 in communication with a water inlet hole 32, the water supply cavity 31 is in communication with the water inlet hole 32, the right end of the connecting shaft 27 is provided with external threads for being threadedly connected with the rear end of the driving drill rod 5, and the left end of the connecting shaft 27 is provided with internal threads for being threadedly connected with the mandrel 28, the drilling medium flowing into the water braid 26 is transmitted to the driving drill rod 5, and the driving drill rod 5 and the water braid 26 are connected. In the technical solution, the mandrel 28 is connected with the driving drill rod 5 and rotates together with the driving drill rod 5 during the working process, the mandrel supporting bearing 34 can ensure smooth rotation of the mandrel 28, reduce friction and wear during rotation, and prolong the service life of the equipment. The connecting shaft 27 and the mandrel 28 are hollow, pressure fluid can be smoothly transmitted from the water inlet assembly to the driving drill rod 5, the stable and continuous supply of the drilling medium is ensured, and the drilling efficiency is improved. The bearing seat 33 is provided with a grease nipple 37 in communication with the inside of the bearing seat 33, the grease nipple 37 can supply lubricating oil to the mandrel supporting bearing 34, keep the mandrel supporting bearing 34 lubricated, reduce the friction of the bearing under high load conditions, prolong the service life of the bearing, effective lubrication reduces the wear and heat accumulation of the bearing, avoids damage of the bearing due to overheating, and improves the reliability and durability of the equipment. The water braid 26 is fixed on the main shaft 6 through the connecting sleeve 35, as shown in Figure 7, the connecting sleeve 35 includes a connecting flange, the connecting flange is provided with waist-shaped holes 36 on the upper and lower sides for bolts to pass through, ensuring the stability of the connection, a hexagonal inner hole is formed in the center of the connecting sleeve 35, the outer wall of the mandrel 28 is provided with a regular hexagon matched with the hexagonal inner hole and in sliding connection with the hexagonal inner hole, and the connecting flange is threadedly fixedly connected with the main shaft 6. The end face of the connecting sleeve 35 facing the driving drill rod 5 and the end face of the connecting shaft 27 are left with a gap M, so that the limiting section 13 can axially slide along the chuck 8, and the driving drill rod 5 can axially float a certain distance. The internal and external threads of the connecting shaft 27 are matched, realizing stable connection of the connecting shaft 27 with the driving drill rod 5 and the mandrel 28. The bearing seat 33 and the shell 30 are fixedly connected through bolts, and the mandrel 28 between the water inlet hole 32 and the shell 30 is sleeved with a sealing ring on both sides, realizing sealing of the drilling medium.

[0091] As shown in Figure 4, the right end of the main drill rod 5 is a male joint 10, and the left end is a female joint 11. The male joint 10 is threadedly connected with a two-way joint 14. The right end of the two-way joint 14 is threadedly connected with the drill rod. The outer periphery of the main drill rod 5 is provided with a rotation-stopping part 12. The outer periphery cross section of the rotation-stopping part 12 is polygonal. The end of the main shaft 6 is provided with an end cover part. The end cover part 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 through bolts. The front end cover 7 is provided with a limiting hole. The limiting hole is a polygonal hole matched with the rotation-stopping part 12. In this embodiment, the outer periphery cross section of the rotation-stopping part 12 is a regular hexagon, and the limiting hole is a hexagonal hole. The front end cover 7 limits the rotation of the rotation-stopping part 12 through the limiting hole. When the main shaft 6 drives the end cover part to stop rotating, the limiting hole of the front end cover 7 synchronously stops rotating. The limiting hole limits the rotation of the rotation-stopping part 12, so that the main drill rod 5 can stop rotating. The above-mentioned mode limits the rotation of the main drill rod 5, but does not limit the axial sliding of the main drill rod 5. Therefore, the main drill rod 5 can axially float a certain distance during the working process. The axial impact generated during the threaded connection and disassembly of the drill rod can be effectively relieved, so as to protect the main drill rod 5 and other connected parts, prolong the service life of the equipment, reduce the impact force on the water braid part 26, reduce the wear of the water braid part 26, and improve the overall durability and reliability of the water braid part 26. The female joint 11 and the rotation-stopping block are provided with a limiting section 13. The limiting section 13 is located between 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, there is still a gap between the outer periphery of the limiting section 13 and the chucks 8. The length of the limiting section 13 is greater than the length of the chucks 8. Therefore, the clamping force of the chucks 8 will not directly act on the main drill rod 5. The main drill rod 5 is avoided from directly bearing the strong clamping force of the chucks 8. The stress deformation of the main drill rod 5 is avoided from metal fatigue deformation during the reciprocating rotation process, so as to reduce the fatigue damage and increase the service life of the main drill rod 5. Due to the axial floating design of the main drill rod 5, the impact force borne by the water braid part 26 during the working process is reduced. This makes the stress borne by the water braid part 26 more uniform. The front end cover 7 includes an integrally formed flange and a sleeve. The front end cover 7 is threadedly fixedly connected with the chuck 8 through the flange, so as to ensure the stability of the fixation.

[0092] As shown in Figure 8, the clamping mechanism 3 includes a base, a swing unit, a guide sleeve assembly and a double clamping unit. As shown in Figure 11, the base is used for bearing and supporting the clamping device, and facilitates the assembly and installation between the clamping device and the drilling machine. The base includes a mounting plate 38. A plurality of countersunk through holes for connecting with the rack 1 are arranged on both sides of the mounting plate 38. A rear clamping device mounting part 39 and a front clamping device mounting part 45 are fixedly arranged on the mounting plate 38.

[0093] As shown in Fig. 12, the rear clamp mounting part 45 comprises a front side plate 46, a rear side plate 47 and a rear clamp mounting position 49, the middle part of the front side plate 46 and the rear side plate 47 is provided with a No. 1 through hole, the top part of the front side plate 46 and the rear side plate 47 is provided with a first opening, the first opening makes the top part of the No. 1 through hole of the front side plate 46 and the rear side plate 47 open and form a U-shaped groove in combination with the No. 1 through hole, the front side plate 46 and the rear side plate 47 are parallel welded on the mounting plate 38, four rear backing plates 48 are welded or bolted between the front side plate 46 and the rear side plate 47, the rear backing plates 48 are arranged on both sides of the U-shaped groove and form slip guiding cavities of slip assembly with the inner wall of the front side plate 46 and the rear side plate 47 respectively, the rear clamp mounting position 49 is bolted on the front and rear sides of the front side plate 46 and the rear side plate 47.

[0094] As shown in Fig. 11, the front clamp mounting part 39 comprises a front support plate 40 and a rear support plate 41, the front end of the front clamp mounting part 39 is provided with a turnover part, specifically, the turnover part comprises two turnover plates 44, the two turnover plates 44 are welded on the front end of the front support plate 40 and the rear support plate 41 respectively, and each turnover plate 44 is provided with a turnover hole 43. The front support plate 40 and the rear support plate 41 are parallel welded on the mounting plate 38, the front support plate 40 and the rear support plate 41 are also provided with a No. 1 through hole coaxial with the rear clamp mounting part 45, the top end of the front support plate 40 and the rear support plate 41 is provided with a second opening which makes the through hole open, and the width of the second opening is greater than or equal to the outer diameter of the large drilling tool. The top part of the front support plate 40 and the rear support plate 41 is provided with a reinforcing plate 42 through bolt, the bottom part of the reinforcing plate 42 is integrally formed with a limiting lug at the center position, the limiting lug can be inserted into the second opening, and the bottom part of the limiting lug is tangent to the cylinder where the No. 1 through hole is located.

[0095] The swing unit is arranged between the front support plate 40 and the rear support plate 41, and the bottom part of the swing unit is spaced from the mounting bottom plate, which is convenient for the swing or turnover of the swing unit. Specifically, the swing unit comprises a swing body 50, a driving member 68 and a pin shaft, as shown in Fig. 13, the swing body 50 comprises a swing support plate 51, the side wall of the swing support plate 51 is provided with a No. 2 through hole coaxial with the No. 1 through hole, the cross section of the swing support plate 51 is in the shape of “N”, four front backing plates 53 are welded or bolted in the middle of the swing support plate 51, the front and rear sides of the swing support plate 51 are bolted with a front clamp mounting position 52, the bottom part of the front side of the swing body 50 is welded with a swing lug 54, the left and right sides of the front end of the swing body 50 are welded with a hinged shaft seat 55, the driving member 68 is a telescopic member such as a pneumatic cylinder or an oil cylinder, in this embodiment, the oil cylinder, which comprises a cylinder body and an output shaft, is hinged with the rack 1, and the output shaft is hinged with the swing lug 54, so that the extension and contraction of the output shaft of the driving member 68 drives the swing body 50 to rotate around the No. 2 through hole or around the hinged shaft seat 55, the pin shaft is matched with the hinged shaft seat 55, and the pin shaft is not connected with the hinged shaft seat 55 in the swing working condition.

[0096] The guide sleeve assembly includes a rear gripper guide sleeve and a front gripper guide sleeve, both of which are coaxial with the first through hole. The rear gripper guide sleeve is a semi-ring guide sleeve 65 as shown in FIG. 16. The outer diameter of the semi-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 the rear side plate 47 is screwed through the countersunk through hole. After installation, the direction of the gap of the semi-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 including an inner guide sleeve 63 and an outer guide sleeve 64. As shown in FIGS. 17 and 18, the outer diameter of the inner guide sleeve 63 and the outer guide sleeve 64 is divided into two levels, a small-diameter section 66 and a large-diameter section 67. The small-diameter section 66 is provided with a through hole coaxial with the inner guide sleeve 63 and the outer guide sleeve 64. As shown in FIG. 10, 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 swing 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 a screw. During installation, the large-diameter section 67 is fixed on the swing support plate 51 by screwing through the countersunk through hole, thereby limiting the axial movement of the swing body 50.

[0098] The inner guide sleeve 63 and the outer guide sleeve 64 are provided at both ends of the front gripper 56. When the drill rod enters or exits the gripper, the guide sleeves limit the circumferential deviation of the drill rod, ensuring that the drill rod is always within the range that can be gripped by the gripper, and protecting the gripper and the rig power head from damage caused by excessive deviation of the drill rod. Since the rear gripper 57 is closer to the power head, the deviation of the drill rod caused by the action of the power head on the main drill rod 5 is small, so the rear gripper 57 only needs a semi-ring guide sleeve 65 to adapt to drill rods of different diameters.

[0099] When the outer guide sleeve 64 and the inner guide sleeve 63 are installed at the same time, the gripper is suitable for smaller diameter drill rods (there are generally specific outer diameter values for specific rigs). When the outer guide sleeve 64 is removed and only the inner guide sleeve 63 is used, the gripper is suitable for larger diameter drill rods.

[0100] At the same time, the inner diameter of the outer slips 60 matches the outer diameter of the larger drill rod that the gripper is suitable for, and the outer diameter of the inner slips 58 is the same as the outer diameter of the larger drill rod, while the inner diameter of the inner slips 58 matches the outer diameter of the smaller drill rod that the gripper is suitable for. Combined with the quick disassembly method of the inner slips 58, the gripper of the present application can be applied to drill rods of two diameters during construction, but when the pin shaft is connected to the hinged shaft seat 55, i.e. in the overturning working condition, the inner guide sleeve 63 and the outer guide sleeve 64 need to be removed.

[0101] In use, according to the size of the diameter of the rod, the guide sleeve assembly can be used simultaneously or the outer guide sleeve 64 can be removed, or the inner guide sleeve 63 and the outer guide sleeve 64 can be removed, the pin shaft is inserted through the turnover hole 43 and connected with the hinged shaft seat 55, so that the connection between the swing body 50 and the front gripper mounting part 39 is changed into the connection mode in the turnover working condition, thereby the front gripper 56 is turned over out of the base through the swing body 50, so as to adapt to the guiding work of the small-diameter drill rod, the guiding work of the large-diameter drill rod and the installation work of the large drilling tool respectively.

[0102] The double-gripping unit includes the rear gripper 57 and the front gripper 56, and the rear gripper 57 and the front gripper 56 each include a slip assembly and a clamping oil cylinder, the slip assembly includes an inner slip 58 and an outer slip 60, as shown in FIGS. 14 and 15, the inner side of the inner slip 58 and the outer slip 60 is provided with a protrusion or a small tooth, thereby increasing the friction coefficient of the inner side of the inner slip 58 and the outer slip 60 and reducing the probability of drill rod slipping.

[0103] As shown in FIG. 15, the front projection of the inner slip 58 is a "cross" shape, the middle section of the inner slip 58 is a circular arc shape, and the upper and lower sides are symmetrically provided with a boss 59, one side of the boss 59 facing the center of the through hole is provided with a countersunk through hole for mounting and connecting the screw between the outer slip 60 and the inner slip 58; as shown in FIG. 14, the inner surface of the outer slip 60 is provided with a rectangular plane 61, the rectangular plane 61 is provided with a threaded hole, and the two sides of the rectangular plane 61 are each vertically provided with two clamping blocks 62, the surface close to the rectangular plane 61 of the clamping block 62 forms four stop surfaces, and the clamping blocks 62 on the same side extend to each other to form two circular arc surfaces, the diameter of the circular arc surface matches the diameter of the larger drill rod and the outer diameter of the inner slip 58; the circular arc surface and the four stop surfaces are combined to form an inner slip 58 mounting space.

[0104] The front projection of the inner slip 58 is a "cross" shape, and the left and right sides are symmetrically provided with four positioning planes, which cooperate with the four stop planes of the outer slip 60 to realize the positioning of the inner slip 58 along the front and rear axial direction of the gripper. The positioning of the inner slip 58 in the circular arc radial direction (i.e. the extension direction of the clamping oil cylinder) is realized by the screw connected with the outer slip 60.

[0105] This positioning mode well plays the advantage of high tensile strength of the threaded connection, and avoids the weak shear strength feature, thereby greatly reducing the possibility of deformation of the slip positioning part.

[0106] When the inner slip 58 is seriously worn or needs to be replaced by a smaller outer diameter drill rod to a larger outer diameter drill rod, the inner slip 58 needs to be removed, only the clamping oil cylinder is retracted, the connecting screw between the inner slip 58 and the outer slip 60 is unscrewed, the inner slip 58 can be removed, at this time the outer guide sleeve 64 needs to be removed, so that the front gripper 56 guide sleeve is matched with the drill rod. The installation steps are opposite.

[0107] The clamping oil cylinder comprises two cylinder barrels and corresponding piston rods, the two cylinder barrels are connected on the rear gripper mounting position 49 and the front gripper mounting position 52 by bolts respectively, the piston rods extend from the two sides of the gripper to the center, the piston rods are welded with output shafts, the output shafts are bolted with the outer slips 60, so that the clamping and loosening of the slips are realized through the reciprocation of the piston rods.

[0108] The specific implementation process is as follows:

[0109] When the brake assembly 16 is in the braking working condition, the hydraulic motor cannot drive the main drill rod 5 to rotate, and the power head can also resist the reverse torque generated by the torsional deformation of the hole drill rod, which is suitable for the directional drilling working condition of the drilling machine, and at this time the power head does not drive the drill rod to rotate; when the brake assembly 16 is in the loosening working condition, the hydraulic motor drives the main drill rod 5 to rotate forward and backward; it is suitable for the rotary drilling and drill rod connection and disconnection working conditions of the drilling machine, at this time the power head drives the drill rod to rotate, and the chuck 8 hydraulic system is in a low-pressure clamping state during drilling; if the drill rod cannot be taken out due to accidents such as drill rod fracture during drilling, a special fishing tool is needed for fishing drilling. Make the chuck 8 in the loosening state, disassemble the water braid part 26, the main drill rod 5 and the connecting shaft 27; use the chuck 8 to clamp the fishing tool to drill, and the chuck 8 is in a high-pressure clamping state.

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

[0111] When the main drill rod 5 needs to be overhauled and replaced, since the main shaft 6 has a receiving hole 9 through which the main drill rod 5 can pass, the worker can directly slide the main drill rod 5 together in the receiving hole 9 to take it out from the rear of the main shaft 6, thereby improving the speed of disassembling the main drill rod 5, and the space at the rear end of the main shaft 6 is relatively spacious. If the main drill rod 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 in the front part is relatively limited, and it is not convenient to install and disassemble the main drill rod 5. The above-mentioned setting can facilitate the worker to assemble the main drill rod 5 and then reassemble it into the main shaft 6, thereby improving the installation speed of the main drill rod 5, and the brake assembly 16 can timely adjust the opening and closing of the main drill rod 5.

[0112] Since the active drill rod 5 often needs to rotate reversely during the operation of the drilling rig, the connection position of the active drill rod 5 and the bidirectional joint 14 is prone to loosening. The point gluing process can be used to apply fastening glue along the axial line on the male joint of the bidirectional joint 14, and then apply glue symmetrically on the other side of the same male joint. When the male joint is screwed with the female joint, the fastening glue at the left end of the male joint will be in contact with more turns of the female joint thread, and the fastening glue will be smeared more widely in the screwing direction. The farther to the right, the less the number of turns of the female joint thread in contact with the fastening glue, and the smaller the diffusion degree of the smeared fastening glue. Therefore, when the male joint is screwed into the female joint of the active drill rod 5, the previously linearly smeared fastening glue will be smeared, forming an approximately trapezoidal glue strip with the left side wider than the right side in the projection on the central symmetry plane of the joint. The glue strip on one side is shown in FIG. 19, and the other side is similar to it. This is just complementary to the force strength of the thread itself, better homogenizing the strength of the threaded connection, ensuring the anti-loosening strength of the reverse rotation, and facilitating the later disassembly. When the external thread of the male joint of the bidirectional joint 14 connected with the drill rod is worn to a certain extent, the bidirectional joint 14 can be removed and installed in the opposite direction. The worn bidirectional joint 14 is fixedly connected with the active drill rod 5 by glue. Since the thread of the male joint connected with the active drill rod 5 is fixedly connected during the operation and will not be worn, the two-end thread switching is equivalent to the use of the double-end joint twice, and the service life is equivalent to twice that of the previous integral active drill rod 5.

[0113] Under normal construction conditions, sometimes the drill rod in the front holder 56 needs to rotate at a small angle relative to the drill rod in the rear holder 57 or the power head, such as pre-tightening the drill rod joint. However, the power head rotates at a high speed and it is difficult to control the rotation angle. At this time, the front holder 56 is not installed with the turnover pin shaft, and the inner guide sleeve 63 is taken as the central shaft to realize the reciprocating swing in a small angle range under the drive of the driving member 68. When the piston rod of the driving member 68 is extended, the left end of the front holder 56 is lowered and the right end is raised. When the piston rod of the driving member 68 is retracted, the left end of the front holder 56 is raised and the right end is lowered.

[0114] When it is necessary to install large drilling tools or to completely remove the swing body 50, the swing body 50 needs to be turned over as a whole out of the base for operation. The turnover process is as follows: install the turnover pin shaft and the related pin shaft fixing member to connect the base and the swing body 50; remove all the outer guide sleeves 64 and the inner guide sleeves 63 at the front and rear ends of the front holder 56; at this time, the central shaft of the rotation of the front holder 56 is switched to the turnover pin shaft, and the front holder 56 can be rotated around the pin shaft in the turnover hole 43 under the drive of the driving member 68; the corresponding relationship between the extension and retraction and the rotation direction of the driving member 68 is the same as that in the swing working condition.

[0115] According to the lever principle, since the rotating pivot moves towards the driving member 68, when the driving member 68 piston rod is retracted, the left end of the front gripper 56 rotates more greatly than in the normal construction condition, and the swing body 50 can turn clockwise beyond the center of the base, so that it is close to all exposed from the base. At this time, the reinforcing plate 42 on the front and rear support plates 41 of the base is removed, and a very spacious space is formed inside and on the top of the front gripper 56, so that large drilling tools can be directly put in from top to bottom.

[0116] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A mining drill rod mounting device, comprising a frame, a power mechanism and a clamping mechanism mounted on the frame, the power mechanism is used to transmit the rotation and thrust power required for mounting and dismounting to the drill rod, and the clamping mechanism is used to clamp the drill rod, characterized in that: The power mechanism comprises a main shaft, a brake assembly, a gearbox, a chuck and a main power source, the output shaft of the main power source is engaged with the gearbox to drive the main shaft to rotate, the brake assembly can rotate the gearbox to brake, the end of the main shaft is provided with a main driving drill rod, the main shaft is provided with a receiving hole for the main driving drill rod to pass through, the end of the main driving drill rod is detachably connected with a bidirectional joint, and the chuck is arranged at the end of the main shaft.

2. A mining drill rod mounting device according to claim 1, characterised in that: The clamping mechanism comprises a rear clamping device mounting portion and a front clamping device mounting portion which are fixedly arranged on the frame, the rear clamping device mounting portion is provided with a rear clamping device, the front clamping device mounting portion is provided with a front clamping device, the front clamping device mounting portion and the rear clamping device mounting portion are both provided with a first through hole through which a drill rod passes, the front clamping device can rotate around the first through hole, the side of the first through hole away from the frame is provided with an opening which makes the first through hole open, a large drilling tool can pass through the opening, the side of the front clamping device mounting portion is provided with a turnover portion, and the front clamping device can turn around the turnover portion and move away from the opening of the front clamping device mounting portion.

3. A mining drill rod mounting device according to claim 2, characterised in that: The front clamping device and the rear clamping device both comprise a clamping oil cylinder and a slip assembly, the clamping oil cylinder and the slip assembly are arranged on both sides of the first through hole, the slip assembly comprises an outer slip and an inner slip, the outer slip is detachably connected with the output shaft of the clamping oil cylinder and forms a moving pair under the drive of the output shaft, and the inner slip is detachably connected with the outer slip.

4. A mining drill rod mounting arrangement according to claim 3, characterised in that: The front surface projection of the inner slip is a "cross" shape, the middle section of the inner slip is a circular arc shape, and the upper and lower sides are symmetrically provided with bosses, one side of the boss facing the center of the first through hole is provided with a countersunk through hole for connecting the outer slip and the inner slip and a screw, the inner surface of the outer slip is provided with a rectangular plane matched with the boss of the inner slip, the rectangular plane is provided with a threaded hole matched with the countersunk through hole of the boss, and two clamping blocks are vertically arranged on both sides of the rectangular plane to form four stop surfaces; the clamping blocks on the same side extend to each other to form two circular arc surfaces, the diameter of the circular arc surface is matched with the diameter of the larger drill rod and the outer diameter of the inner slip; the circular arc surface and the four stop surfaces are combined to form an inner slip mounting space.

5. A mining drill rod mounting arrangement according to claim 4, characterised in that: The inner surface of the inner slip and the outer slip is provided with a plurality of protrusions or small teeth for increasing the friction with the surface of the drill rod.

6. A mining drill rod mounting arrangement according to claim 5, characterised in that: The front clamping device further comprises a swing body, the clamping oil cylinder is arranged 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 turnover portion.

7. A mining drill rod mounting arrangement according to claim 6, characterised in that: The front clamping device further comprises a guide sleeve assembly, the guide sleeve assembly comprises a front clamping device guide sleeve, the front clamping device guide sleeve comprises two groups of guide sleeves, the swing body is provided with a second through hole, the two guide sleeves are detachably connected to the second through hole on both sides of the swing body, each group of guide sleeves comprises an inner guide sleeve and an outer guide sleeve, the outer diameter of the inner guide sleeve and the outer guide sleeve is divided into two levels of a small diameter section and a large diameter section, the small diameter section of the outer guide sleeve can be sleeved in 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 clamping device mounting portion.

8. A mining drill rod mounting arrangement according to claim 7, characterised in that: The guide sleeve assembly further comprises a half-ring guide sleeve, the half-ring guide sleeve is coaxial with the guide sleeve, the half-ring guide sleeve is fixedly connected with the rear clamping device mounting portion, and the direction of the gap of the half-ring guide sleeve is the same as the direction of the opening.

9. A mining drill rod mounting arrangement according to claim 8, characterised in that: The outer diameter of the semi-ring guide sleeve is divided into two stages of small diameter section and large diameter section, the outer diameter of the small diameter section is less than or equal to the inner diameter of the No. 1 through hole of the rear holder mounting portion, and the large diameter section is detachably connected with the side of the rear holder mounting portion away from the front holder mounting portion.

10. A mining drill rod mounting arrangement according to claim 9, characterised in that: The inner diameter of the semi-ring guide sleeve is greater than or equal to the outer diameter of the drill rod.

11. A mining drill rod mounting arrangement according to claim 10, characterised in that: The swing body includes a swing support plate with a cross-section in the shape of a "N" character, both ends of the swing support plate are fixed with a front holder mounting position, both ends of the rear holder mounting portion are fixedly provided with a rear holder mounting position; the clamping oil cylinder includes two cylinder barrels, the cylinder barrels are respectively and symmetrically fixedly installed on the front holder mounting position and the rear holder mounting position, the output shaft is slidably arranged in the cylinder barrel and extends from both sides of the No. 1 through hole to the center, and the outer slip bowl is detachably connected with the output shaft of the clamping oil cylinder.

12. A mining drill rod mounting arrangement according to claim 11, characterised in that: The swing body further includes a front lining plate, the front lining plate is fixedly connected to the top of the swing support plate and forms a slip bowl sliding guide cavity matched with the outer shape size of the outer slip bowl, and the slip bowl assembly is slidably arranged in the slip bowl sliding guide cavity.

13. A mining drill rod mounting arrangement according to claim 12, characterised in that: A swing lug seat and a hinge shaft seat corresponding to the turnover portion are fixedly connected to one side and the lower part of the swing body, the swing lug seat is hingedly connected with a driving member for driving the swing body to swing around the turnover portion; the driving member is a telescopic member, one end of the driving member is hingedly connected with the rack, and the other end is hingedly connected with the swing lug seat.

14. A mining drill rod mounting arrangement according to claim 13, characterised in that: The mounting plate is further provided, and the rear holder mounting portion and the front holder mounting portion are fixedly arranged on the mounting plate, and the mounting plate is fixedly connected with the rack.

15. A mining drill rod mounting arrangement according to claim 14, characterised in that: The front holder mounting portion includes a front support plate and a rear support plate, the front support plate and the rear support plate are fixedly arranged in parallel on the mounting plate, the No. 1 through hole is arranged on the front support plate and the rear support plate, the opening is arranged on the side of the front support plate and the rear support plate away from the mounting plate, and the swing body is rotatably arranged between the front support plate and the rear support plate.

16. A mining drill rod mounting arrangement according to claim 15, characterised in that: The opening side of the front support plate and the rear support plate is detachably connected with a reinforcing plate.

17. A mining drill rod mounting arrangement according to claim 16, characterised in that: The brake assembly includes a brake cover, a clamping piston and a loosening piston, the gearbox includes a gear shaft and multiple gears, the brake assembly is internally provided with a transmission shaft connected with the gear shaft, the brake cover is internally provided with a sliding shaft, one end of the transmission shaft extends into the center of the clamping piston, the transmission shaft is circumferentially provided with multiple first slips, the clamping piston is sleeved on the first slip and can move in the axial direction, the surface of the first slip away from the transmission shaft is a bevel surface, the surface opposite to the first slip of the clamping piston is a slope surface matched with the bevel surface of the first slip, the clamping piston can slide through the first slip to clamp the transmission shaft, and the loosening piston is slidably sleeved on the sliding shaft and can push the clamping piston to release the clamping.

18. A mining drill rod mounting arrangement according to claim 17, characterised in that: The brake cover is provided with an oil inlet one and an oil inlet two, a first oil chamber is formed between the loosening piston side away from the clamping piston and the brake cover, the oil inlet one can provide hydraulic oil to the first oil chamber, the clamping piston side away from the loosening piston is provided with a second oil chamber, and the oil inlet two can provide hydraulic oil to the second oil chamber.

19. A mining drill rod mounting arrangement according to claim 18, characterised in that: The water braid portion for providing pressure fluid to the driving drill rod is further provided, the water braid portion includes a connecting shaft, a core shaft and a water inlet assembly, the core shaft and the connecting shaft are both hollow shafts, the core shaft is fixedly connected and communicated with the connecting shaft, the other end of the connecting shaft is connected with the driving drill rod, the core shaft is communicated and rotatably connected with the water inlet assembly, a bearing seat is arranged to support the core shaft, and the bearing seat is internally provided with a core shaft support bearing sleeved on the outer periphery of the core shaft.

20. A mining drill rod mounting apparatus according to either one of claims 1 or 19 and wherein: The active drill rod has a male joint at one end and a female joint at the other end, the male joint is detachably connected with the bidirectional joint, the outer periphery of the active drill rod is provided with a rotation-stopping part, the outer periphery cross section of the rotation-stopping part is polygonal, the end part of the main shaft is provided with an end cover part, the end cover part comprises a front end cover, the front end cover is fixed on the chuck, the front end cover is provided with a limiting hole, and the front end cover limits the rotation of the rotation-stopping part through the limiting hole.

21. A mining drill rod mounting arrangement according to claim 20, characterised in that: A limiting section is arranged between the female joint and the rotation-stopping 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.

22. A mining drill rod mounting arrangement according to claim 21, characterised in that: The length of the limiting section is greater than the length of the chuck.

23. A mining drill rod mounting arrangement according to claim 22, characterised in that: The end part of the mandrel is provided with a water inlet hole, the water inlet assembly comprises a shell, a water supply cavity in communication with the water inlet hole is arranged in the shell, the water supply cavity is in communication with the water inlet hole, the connecting shaft is provided with an external thread at one end close to the active drill rod for thread connection with the rear end of the active drill rod, and the connecting shaft is provided with an internal thread at one end close to the water braid part for thread connection with the mandrel.

24. A mining drill rod mounting arrangement according to claim 23, characterised in that: The water braid part further comprises a connecting sleeve, the connecting sleeve comprises a connecting flange, the connecting flange is provided with a waist-shaped hole for bolt penetration, and the water braid part is fixed on the gearbox through the connecting sleeve.

25. A mining drill rod mounting arrangement according to claim 24, characterised in that: The center of the connecting sleeve is provided with a hexagonal inner hole, the outer wall of the mandrel is a regular hexagon matched with the hexagonal inner hole, and the outer wall of the mandrel is in sliding connection with the hexagonal inner hole.

26. A mining drill rod mounting apparatus as claimed in claim 25 wherein: The end face of the connecting sleeve facing the active drill rod and the end face of the connecting shaft leave a gap.

27. A mining drill rod mounting arrangement according to claim 26, characterised in that: The bearing seat is provided with a grease nipple, and the grease nipple is in communication with the inside of the bearing seat.

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