Mining drill rod mounting device

Abstract

The utility model relates to the technical field of coal mine drilling machines, and discloses a mining drill rod installation device which comprises a rack, a power mechanism and a clamping mechanism are installed on the rack, the power mechanism is used for transmitting rotation and propelling power needed by assembly and disassembly to a drill rod, the clamping mechanism is used for clamping the drill rod, and the power mechanism comprises a main shaft, a brake assembly, a gearbox and a main power source. An output shaft of the main power source is meshed with the gearbox to drive the main shaft to rotate, the gearbox comprises a gear shaft and a multi-stage transmission gear, a transmission shaft connected with the gear shaft is arranged in the brake assembly, the brake assembly can conduct rotation braking on the transmission shaft, a driving drill rod is installed at the end of the main shaft, and a containing hole allowing the driving drill rod to penetrate through is formed in the main shaft. And the end part of the driving drill rod is also detachably connected with a two-way joint. According to the technical scheme, the driving drill rod can be detached conveniently, and meanwhile the service life of the driving drill rod can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine drilling machines, in particular to a mining drill rod installation device. Background Art

[0002] The power head and the clamp are important components of the mining drill pipe installation device. The power head is used to transmit the rotation and propulsion power required for installation and disassembly to the drill pipe. The clamp is mainly responsible for the clamping task of the drill pipe and cooperates with the power head to realize the connection and disconnection of the drill pipe joint, while ensuring that the drill pipe will not slip. The drill pipe usually includes ordinary drill pipes and large drilling tools such as bottom hole motors.

[0003] Existing automatic drilling rigs usually use an active drill rod to connect the power head and the drill rod. In order to enable a power head to use drill rods of different outer diameters, a drill rod connection mechanism composed of a chuck and an active drill rod has appeared in recent years. The active drill rod is fixedly connected to the front end of the chuck. By installing and removing the active drill rod and switching the use of the active drill rod and the chuck, the purpose of clamping drill rods of different outer diameters can be achieved.

[0004] The existing directional drilling rig power head includes a main motor, a transmission, a main shaft, an active drill rod and a water braid. The transmission has a driving shaft, one end of which is connected to the main motor, and the driving shaft is meshed with the main shaft through the gears in the transmission. One end of the main shaft is circumferentially fixedly connected to the active drill rod, and the other end of the driving shaft is connected to an angle adjuster through the transmission, so that the directional drilling rig power head has the functions of efficiently and accurately adjusting the tool surface and braking the main motor; the core shaft in the water braid is connected to the active drill rod with an axial floating structure through a connecting shaft, and a connecting sleeve is provided at one end of the main shaft close to the water braid to form a hexagonal sleeve sliding pair with the connecting shaft, so that the core shaft support bearing is protected from axial impact during drilling, thereby improving its service life and reducing the number of equipment maintenance times.

[0005] However, the disadvantage of the above technical solution is that when the active drill rod needs to be replaced, the end cover fixing the active drill rod must first be removed from the front end, and then the active drill rod and the connecting shaft must be unlocked before the active drill rod can be taken out from the front end. Since the space from the front end of the chuck to the clamp is very limited and is generally located in the middle of the drilling rig, it is inconvenient to pull out the active drill rod, which can easily affect the construction efficiency. Utility Model Content

[0006] The utility model aims to provide a mining drill rod installation device, which is convenient for disassembly of an active drill rod and can prolong the service life of the active drill rod.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: 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 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 gearbox includes a gear shaft and a multi-stage transmission gear, a transmission shaft connected to the gear shaft is provided inside the brake assembly, the brake assembly can perform rotational braking on the transmission shaft, an active drill rod is installed at the end of the main shaft, a receiving hole for the active drill rod to pass through is opened in the main shaft, and the end of the active drill rod is also detachably connected with a two-way joint.

[0008] The beneficial effects of this solution are as follows: a transmission shaft connected to the gear shaft is provided inside the brake assembly, and the brake assembly can perform rotational braking on the transmission shaft to cooperate with the directional drilling of the drilling rig and the drill rod connection and disconnection conditions. When the active drill rod needs to be inspected and replaced, since a receiving hole is provided 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 increasing 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 plate must 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-mentioned arrangement can facilitate the staff to assemble the active drill rod and then re-install it into the main shaft, thereby increasing 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] Since the active drill rod often needs to rotate in the opposite direction during the operation of the drilling rig, the connection position between the active drill rod and the two-way joint is prone to loosening. The glue dispensing process can be used to apply the fastening glue on the male joint of the two-way joint along the axial straight line, and then apply the glue symmetrically on the other side of the same male joint. When the male joint and the female joint are tightened, the fastening glue on the left end of the male joint will contact more weeks of the female joint thread, and the fastening glue will be spread wider along the tightening direction. The further to the right, the fewer weeks the fastening glue contacts the female joint thread, and the smaller the spread of the application. Therefore, when the male joint is screwed into the female joint of the active drill rod, the fastening glue previously applied in a straight line will be spread, forming a trapezoidal tape projected on the central symmetry plane of the joint, which is wide on the left and narrow on the right. This just complements the strength of the thread itself, and better averages the strength of the threaded connection, which not only ensures the reverse anti-loosening strength, but also facilitates 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 by 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 the double-headed joint being used twice, and its life is also equivalent to twice that of the previous integral active drill pipe.

[0010] Furthermore, the clamping mechanism includes a rear clamper mounting part and a front clamper mounting part fixedly mounted on the frame, the rear clamper is arranged on the rear clamper mounting part, the front clamper is arranged on the front clamper mounting part, both the front clamper mounting part and the rear clamper mounting part are provided with a No. 1 through hole for the drill rod to pass through, the front clamper can rotate around the through hole, the No. 1 through hole is provided with an opening to open the through hole away from the frame side, and a large drilling tool can pass through the opening, and a flipping part is provided on the side of the front clamper mounting part, and the front clamper can flip around the flipping part and away from the opening of the front clamper mounting part.

[0011] The beneficial effects of this solution are as follows: the front clamp has two working conditions: swinging condition: under normal construction conditions, the front clamp uses the No. 1 through hole as the rotation axis. At this time, a certain relative rotation can occur between the front clamp and the rear clamp, so that the drill rod in the front clamp and the drill rod in the rear clamp or the power head produce a small angle of relative rotation (such as pre-loosening the drill rod joint), completing the pre-loosening of the rotating rod; flipping condition: when a large drilling tool needs to be installed, or when the front clamp needs to be removed as a whole, the front clamp needs to be flipped out of the front clamp installation part as a whole for operation. At this time, the flipping part is used as the rotation axis, and the front clamp is flipped out After the front clamp is installed, since the No. 1 through holes of the front clamp installation part and the rear clamp installation part are both provided with openings, the No. 1 through hole is open away from the side of the frame. The axis of the large drilling tool can be directly parallel to the drilling axis and directly placed into the rear clamp through the opening to complete the installation of the large drilling tool. After the installation of the large drilling tool is completed, the front clamp is flipped back to its original position to restore the connection structure of the swinging working condition. There is no need to adjust the up and down inclination angles of the axis of the inner hole of the clamp multiple times as in the first solution, nor is there any need to dismantle the clamp as a whole as in the second solution, which consumes a lot of manpower and construction time. The installation process is simple and fast.

[0012] Furthermore, the front clamp and the rear clamp both include a clamping cylinder and a cava assembly, which are arranged on both sides of the No. 1 through hole. The cava assembly includes an outer cava and an inner cava. The outer cava is detachably connected to the output shaft of the clamping cylinder and forms a moving pair under the drive of the output shaft. The inner cava is detachably connected to the outer cava.

[0013] The beneficial effects of this solution are as follows: the clamp generally adopts a structure in which the slips are installed on the surface of the slip seat. After assembly, it can only be used to clamp drill rods with one outer diameter. If it is needed for drilling tools with other outer diameters such as large drilling tools and salvage drill rods, it is necessary to perform complex operations of removing and replacing the slips, which will also take a lot of time. Therefore, the existing drilling rig clamps are also difficult to adapt to drilling tools of different specifications. Through the design of internal slips and external slips, this solution can adapt to drill rods of two diameters at the same time. When the internal slips are severely worn or need to be replaced from a smaller outer diameter drill rod to a larger outer diameter drill rod, the internal slips need to be removed. Just retract the output shaft completely, unscrew the connecting screws between the internal slips and the external slips, and the internal slips can be removed. When installing the internal slips, it is only necessary to fix the new internal slips on the external slips, which greatly simplifies the process of removing and replacing the slips, reduces the operation time, and improves the construction efficiency.

[0014] Furthermore, the inner surfaces of the inner slips and the outer slips are provided with a plurality of bumps or fine sharp teeth for increasing the friction force with the surface of the drill pipe.

[0015] The beneficial effect of this solution is that by providing a bump or fine pointed teeth that increases the friction with the surface of the drill rod, the probability of the drill rod slipping is reduced, and the work efficiency during installation or disassembly is improved.

[0016] Furthermore, the front clamp also includes a swing body, the clamping cylinder is installed at both ends of the swing body, a driving member is hinged on the frame, and the output shaft of the driving member is hinged at the bottom of the swing body below the flip part.

[0017] The beneficial effect of this solution is that due to the arrangement of the driving member, it is convenient to drive the swinging body to swing or flip.

[0018] Furthermore, it also includes a guide sleeve assembly, the guide sleeve assembly includes a front clamp guide sleeve, the front clamp guide sleeve includes two groups of guide sleeves, a No. 2 through hole is provided on the swing body, and the two guide sleeves are detachably connected to the No. 2 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 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 in the small diameter section of the inner guide sleeve; the small diameter section of the inner guide sleeve is coaxial with the No. 2 through hole of the support plate symmetrically arranged front and back on the swing body, and the large diameter section is coaxial with the No. 1 through hole of the front clamp mounting portion.

[0019] The beneficial effect of this scheme is that during the working process of the clamp, the drill rod needs to constantly enter and exit the clamp. Since the slip assemblies on both sides of the clamp need to be frequently opened and closed, and the spacing often changes, they generally do not have a guiding function. Therefore, a guide sleeve is generally set in front of the clamp to guide the drill rod in and out of the clamp to prevent the drill rod from deviating from the axis during transition and causing damage to the clamp and the power head. In the traditional drilling rig structure, the clamp and the guide sleeve are generally set at the front end of the frame as two independent components, occupying a large length space. Some drilling rigs used in narrow spaces or compact structure requirements have cancelled the guide sleeve to save space in the drilling direction. The inner sleeve of the traditional guide sleeve is a rotatable hollow cylinder. An inner sleeve can only adapt to a drill rod with one outer diameter. After the drilling rig changes the diameter of the drill rod, the guide sleeve must be replaced as a whole or the inner sleeve must be replaced separately to adapt to the outer diameter of the new drill rod. It is relatively simple to replace the guide sleeve as a whole, but the spare parts cost is high; replacing the inner sleeve separately is more complicated, but the cost is low, which is currently the method commonly used on site. However, replacing the inner sleeve alone still has the problem of difficult identification and management of accessories. Since the specifications of several drill rods used in the same drilling rig are similar, the diameter difference of the drill rod is generally about 10mm, which is reflected in the thickness difference of the inner sleeve, which is only a few millimeters. It is very difficult to identify such a small difference without measuring tools on the underground site, so it is also difficult to manage accessories on site. At the same time, since the guide sleeve and the clamp are two independent components, the installation space requirement is large, resulting in a longer frame of the drilling rig, and the guide sleeve can only be used for one type of drill rod, making it difficult to replace on site.

[0020] This solution provides an inner guide sleeve and an outer guide sleeve to accommodate two specifications of drill rods. At the same time, the guide sleeve is fixed on the swing body as a connection point for rotational connection between the swing body and the front clamp installation position under normal construction conditions. When flipping is required, it is only necessary to disassemble the guide sleeve and convert the position of the rotational connection between the swing body and the front clamp to the axis of the flip hole through pins or other forms to complete the switching of working conditions, which is easy to operate. In addition, the guide sleeve and the clamp are combined into a whole, reducing the demand for installation space and making the overall layout of the drilling rig more compact. At the same time, the structures of the two parts of the inner guide sleeve and the outer guide sleeve are obviously different, which is convenient for on-site accessory management and identification.

[0021] Furthermore, the guide sleeve assembly also includes a semi-ring guide sleeve, which is coaxial with the guide sleeve, and the semi-ring guide sleeve is fixedly connected to the rear clamp mounting portion, and the notch direction of the semi-ring guide sleeve is the same as the opening direction.

[0022] The beneficial effects of this solution are as follows: By setting a semi-circular guide sleeve on the rear gripper mounting part and making the notch direction of the semi-circular guide sleeve 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, not only can the drill pipe be inserted into the rear gripper from one end of the first through hole, but also the drill pipe can be directly placed into the rear gripper from the open end, improving the installation and disassembly efficiency of the drill pipe.

[0023] Furthermore, the swinging body includes a swinging support plate with a "U"-shaped cross-section. Both ends of the swinging support plate are fixed with front gripper mounting positions, and both ends of the rear gripper mounting part are fixedly provided with rear gripper mounting positions; the clamping oil cylinder includes two cylinder barrels, which are respectively symmetrically fixedly installed on the front gripper mounting position and the rear gripper mounting position. 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.

[0024] 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 synchronism and precise control of the clamping action, which is beneficial to accurately execute 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, the clamping force is evenly distributed, improving the clamping accuracy and stability, and reducing the risk of skew or slip of the drill pipe during operation.

[0025] 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 chuck sliding guide cavity that matches the outer shape size of the outer slip chuck with the swinging support plate. The chuck assembly is slidably arranged in the chuck sliding guide cavity.

[0026] The beneficial effects of this solution are as follows: Through the limiting and guiding effects of the chuck 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.

[0027] 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 part that drives the swinging body to swing around the flipping part; the driving part is a telescopic part, one end of which is hinged to the frame and the other end is hinged to the swinging ear seat.

[0028] The beneficial effect of this solution is that the swing body is driven to rotate and flip through the retractable driving member, and the operator only needs to replace the corresponding parts when switching the working conditions, which reduces the manpower input and improves the automation of the equipment.

[0029] Furthermore, the front clamp mounting part includes a front support plate and a rear support plate, which are fixed in parallel on the mounting plate, 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.

[0030] Furthermore, the opening sides of the front support plate and the rear support plate are detachably connected with reinforcement plates.

[0031] The beneficial effects of this solution are as follows: through the design of the reinforcement plate, the reduction in structural strength of the front support plate and the rear support plate caused by the single-sided opening is effectively reduced. At the same time, the connection method is designed to be detachable, and the reinforcement plate can also be removed when installing large drilling tools or repairing them, so as to avoid the reinforcement plate affecting the installation of large drilling tools or the repair of drill rods.

[0032] Furthermore, the brake assembly includes a brake cover, a clamping piston and a releasing piston. 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 cava ones are distributed circumferentially of the transmission shaft. The clamping piston is sleeved on the cava one and can move axially. The surface of the cava one away from the transmission shaft is an inclined surface. The surface of the clamping piston opposite to the cava one is a slope surface matching the inclined surface of the cava one. The clamping piston can slide through the cava one to clamp the transmission shaft. The releasing piston is slidingly sleeved on the sliding shaft and can push the clamping piston to release the clamping.

[0033] The beneficial effects of this solution are as follows: the surface of the clamping piston opposite to the slip 1 is a slope surface that matches the slope surface of the slip 1, and the clamping piston can slide so that the slope surface inside it contacts the slope surface of the slip 1, and the transmission shaft is clamped by the radial movement of the slip 1, thereby limiting the rotation of the transmission shaft. The transmission shaft can be quickly clamped and released by the axial sliding of the clamping piston and the radial movement of the slip 1. The cooperation between the slope surface and the slope surface provides a stable clamping force, ensuring that the transmission shaft will not slide during operation, ensuring the reliability of the clamping of the transmission shaft, and being adaptable to transmission shafts of different diameters. Even if the surface of the transmission shaft is worn, stable clamping can be achieved by extending the sliding distance of the clamping piston. It has strong versatility and can be applied to various types of drilling rig power heads.

[0034] Furthermore, the brake cover is provided with oil inlet 1 and oil inlet 2, and a first oil chamber is formed between the side of the release piston away from the clamping piston and the brake cover. Oil inlet 1 can provide 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. Oil inlet 2 can provide hydraulic oil to the second oil chamber.

[0035] The beneficial effects of this solution are as follows: the pressure oil enters the second oil chamber from the oil inlet port 2, pushing the clamping piston to move toward the direction close to the slip 1, so that the slope inside it contacts the inclined surface of the slip 1, thereby pushing the slip 1 to move inward and limiting the radial displacement of the slip 1, thereby clamping the transmission shaft and achieving transmission shaft braking; the pressure oil enters the first oil chamber from the oil inlet port 1, pushing the release piston to move, and its end face pushes the clamping piston to move away from the slip 1, releasing the radial displacement restriction of the slip 1, and thus releasing the rotation restriction of the transmission shaft. The automatic control of the brake assembly is achieved through the hydraulic system, which improves the automation level and efficiency of the operation. The hydraulic pressure can provide stable and adjustable pressure to ensure the accuracy of the clamping and releasing process, and the hydraulic pressure has high stability and reliability, ensuring that the brake assembly can work stably under various working conditions, reducing the failure rate and maintenance costs.

[0036] Furthermore, it also includes a water braid part for providing pressure fluid to the active drill pipe, the water braid part includes a connecting shaft, a core shaft and a water inlet assembly, the core shaft and the connecting shaft are both hollow shafts, the core shaft is fixedly connected and communicated with the connecting shaft, the other end of the connecting shaft is connected to the active drill pipe, the core shaft is communicated and rotatably connected with the water inlet assembly, a bearing seat is provided to support the core shaft, and a core shaft support bearing is provided in the bearing seat and is sleeved on the outer periphery of the core shaft.

[0037] The beneficial effects of this solution are as follows: by setting a connecting shaft and a water braid, the core shaft is fixedly connected and communicated with the connecting shaft, and the other end of the connecting shaft is connected to the active drill rod, so that the drilling medium flowing into the water braid is transmitted to the active drill rod, and the active drill rod and the water braid are connected. In this technical solution, the core shaft is connected to the active drill rod and rotates with the active drill rod during operation. The core shaft support bearing can ensure smooth rotation of the core shaft, reduce friction and wear during the rotation process, and extend the service life of the equipment. Through the hollow design of the connecting shaft and the core shaft, the pressure fluid can be smoothly transmitted from the water inlet assembly to the active drill rod, ensuring that the drilling medium can be stably and continuously supplied, thereby improving the drilling efficiency.

[0038] Furthermore, one end of the active drill rod is a male joint, and the other end is a female joint. The male joint and the two-way joint are detachably connected. A stopper is provided on the outer periphery of the active drill rod. The outer periphery cross-section of the stopper is polygonal. An end cover is provided on the end of the main shaft. The end cover includes a front end cover, which is fixed on the chuck. A limiting opening is opened on the front end cover. The front end cover limits the rotation of the stopper through the limiting opening.

[0039] The beneficial effects of this solution are as follows: when the main shaft drives the end cover to stop rotating, the limit opening of the front end cover stops rotating synchronously, and the limit opening limits the rotation of the stop part, so that the active drill rod can stop rotating. The above method realizes the limitation of the rotation of the active drill rod, but does not limit the axial sliding of the active drill rod, so that the active drill rod can float axially for a certain distance during operation, which can effectively alleviate the axial impact of the drill rod during the threaded connection and disassembly process, thereby protecting the active drill rod and other connecting parts and extending the service life of the equipment; when the active drill rod produces axial floating, it can reduce the impact force on the water braid part, reduce the wear of the water braid part, and improve its overall durability and reliability.

[0040] Furthermore, a limiting section is provided between the female joint and the anti-rotation block, and the limiting section is located between the chucks. When the chucks are clamped to the limit position, there is still a gap between the chucks and the outer periphery of the limiting section.

[0041] The beneficial effects of this solution are as follows: when the chuck moves to the extreme position, there is still a gap between the chuck and the outer periphery of the limit section, so that the limit section can slide axially along the chuck, so that the active drill rod can float axially for a certain distance, so that the clamping force of the chuck will not directly act on the active drill rod, thereby avoiding the active drill rod directly bearing the strong clamping force of the chuck, and avoiding the metal fatigue deformation of the active drill rod during the reciprocating rotation, thereby reducing fatigue damage and increasing the service life of the active drill rod; due to the axial floating design of the active drill rod, the impact force borne by the water braid during operation is reduced, which makes the force on the water braid more uniform.

[0042] Furthermore, the length of the limiting section is greater than the length of the chuck.

[0043] The beneficial effects of this solution are as follows: the length of the limit section is greater than the clamping length of the chuck, so that the active drill rod has a certain floating distance in the chuck, so as to alleviate the axial impact generated when the active drill rod is connected or disconnected with the drill rod, thereby protecting the active drill rod.

[0044] Furthermore, the water braid part also includes a connecting sleeve, the connecting sleeve includes a connecting flange, and the connecting flange is provided with a waist-shaped hole for bolts to pass through. The water braid part is fixed to the gearbox through the connecting sleeve, and a gap is left between the end face of the connecting sleeve facing the active drill rod and the end face of the connecting shaft.

[0045] 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 rod and the end face of the connecting shaft, the limiting section can slide axially along the chuck, so that the active drill rod can float axially for a certain distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the structure of the drill rod installation device for mining in the utility model;

[0047] Figure 2 It is a cross-sectional view of the power mechanism in the utility model;

[0048] Figure 3 It is a detailed diagram of the brake assembly in the utility model;

[0049] Figure 4 It is a detailed view of the active drill rod in the utility model;

[0050] Figure 5 It is a detailed view of the water braid part of the utility model;

[0051] Figure 6 It is a connection diagram of the water braid part in the utility model;

[0052] Figure 7 It is a right side view of the connecting sleeve in the utility model;

[0053] Figure 8 A three-dimensional diagram of the clamping mechanism of the utility model;

[0054] Fig. 9 It is a front view of the clamping mechanism of the utility model;

[0055] Fig.10 for Fig. 9 Sectional view at AA in the middle;

[0056] Fig.11 A three-dimensional diagram of the base of the utility model;

[0057] Fig.12 This is a three-dimensional diagram of the base of the utility model after removing the reinforcement plate;

[0058] Fig.13 It is a three-dimensional diagram of the swinging body of the utility model;

[0059] Fig.14 This is a three-dimensional diagram of the external slip of the utility model;

[0060] Fig.15 It is a three-dimensional diagram of the inner slip of the utility model;

[0061] Fig.16 This is a three-dimensional diagram of the semi-ring guide sleeve of the utility model;

[0062] Fig.17 This is a three-dimensional diagram of the outer guide sleeve of the utility model;

[0063] Fig.18 This is a schematic diagram of the inner guide sleeve of the utility model;

[0064] Fig.19 It is a schematic diagram of the bidirectional joint adhesive in the utility model. DETAILED DESCRIPTION

[0065] The following is further described in detail through specific implementation methods:

[0066] The reference numerals in the drawings of the specification include: frame 1, power mechanism 2, clamping mechanism 3, main power source 4, active drill rod 5, main shaft 6, front end cover 7, chuck 8, accommodating hole 9, male joint 10, female joint 11, anti-rotation part 12, limit section 13, two-way joint 14, gearbox 15, brake assembly 16, brake cover 17, clamping piston 18, loosening piston 19, sliding shaft 20, slip 1 21, transmission shaft 22, oil inlet 1 23, oil inlet 2 24, key 25, water braid 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, waist-shaped hole 36 , grease nipple 37, mounting plate 38, front clamp mounting portion 39, front support plate 40, rear support plate 41, reinforcement plate 42, flip hole 43, flip plate 44, rear clamp mounting portion 45, front side plate 46, rear side plate 47, rear lining plate 48, rear clamp mounting position 49, swing body 50, swing support plate 51, front clamp mounting position 52, front lining plate 53, swing ear seat 54, hinged shaft seat 55, front clamp 56, rear clamp 57, inner cava 58, boss 59, outer cava 60, rectangular plane 61, block 62, inner guide sleeve 63, outer guide sleeve 64, semi-ring guide sleeve 65, small diameter section 66, large diameter section 67, drive member 68.

[0067] Example

[0068] The mining drill pipe installation device is basically as follows Figure 1-19 shown.

[0069] like Figure 1 The mining drill rod installation device shown comprises 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 rotation and propulsion power required for installation and disassembly to the drill rod, and the clamping mechanism 3 is used to clamp the drill rod.

[0070] like Figure 1-2 As 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 is meshed with the gearbox 15 to drive the main shaft 6 to rotate. The main power source 4 can be various rotary power drive devices, such as: hydraulic motor, electric motor, etc. The main power source 4 of this application is a hydraulic motor. The gearbox 15 includes a gear shaft and a multi-stage gear. The brake assembly 16 is provided with 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. An active drill rod 5 is installed at the end of the main shaft 6, and a receiving hole 9 is opened in the main shaft 6 for the active drill rod 5 to pass through.

[0071] like Figure 3As shown, the brake assembly 16 includes a brake cover 17, a clamping piston 18 and a releasing 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 cava 1s 21 are distributed circumferentially of the transmission shaft 22. In this embodiment, the number of cava 1s 21 is 3. The clamping piston 18 is sleeved on the outside of the cava 1 21 and can move axially along the transmission shaft 22. The surface of the cava 1 21 away from the transmission shaft 22 is an inclined surface. The surface of the clamping piston 18 opposite to the cava 1 21 is a slope surface matched with the inclined surface of the cava 1 21. The clamping piston 18 can slide and push the cava 1 21 to slide radially to clamp the transmission shaft 22. The releasing 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 cava 21 is a slope surface that matches the slope surface of the cava 21. The clamping piston 18 can slide so that the slope surface inside it contacts the slope surface of the cava 21. The drive shaft 22 is clamped by the radial movement of the cava 21, thereby limiting the rotation of the drive shaft 22. The drive shaft 22 is quickly clamped and released by the axial sliding of the clamping piston 18 and the radial movement of the cava 21. The cooperation between the slope surface and the slope surface provides a stable clamping force, ensuring that the drive shaft 22 will not slide during operation, ensuring the reliability of the clamping of the drive shaft 22, and being able to adapt to drive shafts 22 of different diameters. Even if the surface of the drive shaft 22 is worn, stable clamping can be achieved by extending the sliding distance of the clamping piston 18, and it has strong versatility.

[0072] like Figure 3As shown, the brake cover 17 is provided with an oil inlet 1 23 and an oil inlet 24, a first oil chamber is formed between the brake cover 17 and the side of the release piston 19 away from the clamping piston 18, the oil inlet 1 23 can provide hydraulic oil to the first oil chamber, the side of the clamping piston 18 away from the release piston 19 is provided with a second oil chamber, the oil inlet 24 can provide hydraulic oil to the second oil chamber, the inner wall and the outer wall of the release piston 19 are provided with sealing rings, the outer wall sleeve of the clamping piston 18 is also provided with a sealing ring, the setting of the sealing ring effectively prevents the leakage of hydraulic oil and ensures that the pressure in the hydraulic structure remains stable. The pressure oil enters the second oil chamber from the oil inlet 24, pushing the clamping piston 18 to move to the left, so that the slope inside it contacts the inclined surface of the cava 21, thereby pushing the cava 21 to move inward and limiting the radial displacement of the cava 21, thereby clamping the drive shaft 22 to achieve braking of the drive shaft 22; the pressure oil enters the first oil chamber from the oil inlet 23, pushing the release piston 19 to move, and its end face pushes the clamping piston 18 to move to the right, releasing the radial displacement restriction of the cava, and thus releasing the rotation restriction of the drive shaft 22, and realizing automatic control of the brake assembly 16 through hydraulics, thereby improving the automation level and efficiency of the operation, and the hydraulics can provide stable and adjustable pressure to ensure the accuracy of the clamping and releasing processes, and the hydraulics have high stability and reliability, ensuring that the brake assembly 16 can work stably under various working conditions, reducing the failure rate and maintenance costs.

[0073] It also includes a water braid 26 that provides pressure fluid to the active drill pipe 5. Figure 5 and Figure 6As shown, the water braid 26 includes a connecting shaft 27, a connecting sleeve 35, a core shaft 28, a bearing seat 33 and a water inlet assembly. The core shaft 28 and the connecting shaft 27 are both hollow shafts. The core shaft 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 rod 5. The core shaft 28 is communicated and rotatably connected with the water inlet assembly. The bearing seat 33 is used to support the core shaft 28. The bearing seat 33 is provided with a core shaft support bearing 34 sleeved on the outer periphery of the core shaft 28. The water inlet assembly includes a housing 30. The housing 30 is provided with a water supply chamber 31 communicated with the water inlet hole 32. The water supply chamber 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 rod 5; the left end of the connecting shaft 27 is provided with an internal thread for threaded connection with the core shaft 28, so as to transfer the drilling medium flowing into the water braid 26 to the active drill rod 5, and connect the active drill rod 5 and the water braid 26. In the present technical solution, the core shaft 28 is connected to the active drill rod 5 and rotates together with the active drill rod 5 during operation. The core shaft support bearing 34 can ensure the smooth rotation of the core shaft 28, reduce friction and wear during the rotation process, and extend the service life of the equipment. The connecting shaft 27 and the core shaft 28 are hollow inside, and the pressure fluid can be smoothly transmitted from the water inlet assembly to the active drill rod 5, ensuring that the drilling medium can be stably and continuously supplied, thereby improving the drilling efficiency. A grease nipple 37 is provided on the bearing seat 33, and the grease nipple 37 is connected to the inside of the bearing seat 33. The grease nipple 37 can provide lubricating oil to the core shaft support bearing 34 to keep the core shaft support bearing 34 lubricated, reduce the friction of the bearing under high load conditions, and extend the service life of the bearing; effective lubrication reduces bearing wear and heat accumulation, avoids bearing damage caused by overheating, and improves the reliability and durability of the equipment. The water braid 26 is fixed to the main shaft 6 through a connecting sleeve 35, such as Figure 7 As shown, the connecting sleeve 35 includes a connecting flange, and waist-shaped holes 36 for bolts to pass through are opened on both sides of 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, and the outer wall of the core shaft 28 is set to a regular hexagon that matches the hexagonal inner hole and is slidably connected to the hexagonal inner hole. The connecting flange is threadedly fixedly connected to the main shaft 6. A gap M is left between the end face of the connecting sleeve 35 facing the active drill rod 5 and the end face of the connecting shaft 27, so that the limiting section 13 can slide axially along the chuck 8, so that the active drill rod 5 can float axially for a certain distance. The internal and external threads of the connecting shaft 27 cooperate to achieve a stable connection with the active drill rod 5 and the core shaft 28. The bearing seat 33 and the housing 30 are fixedly connected by bolts, and sealing rings are sleeved between the core shaft 28 and the housing 30 on both sides of the water inlet hole 32 to achieve sealing of the drilling medium.

[0074] like Figure 4As shown, the right end of the active drill rod 5 is a male connector 10, and the left end is a female connector 11. A two-way connector 14 is threadedly connected to the male connector 10. The right end of the two-way connector 14 is threadedly connected to the drill rod. A stopper 12 is provided on the outer periphery of the active drill rod 5. The outer peripheral cross section of the stopper 12 is a polygon. An end cover is provided at the end of the main shaft 6. The end cover 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. The limiting opening is a polygonal opening that matches the stopper 12. In this embodiment, the outer peripheral cross section of the stopper 12 is a regular hexagon, and the limiting opening is a hexagonal inner hole. The front end cover 7 limits the rotation of the stopper 12 through the limiting opening. When the main shaft 6 drives the end cover to stop rotating, the limiting opening of the front end cover 7 stops rotating synchronously. The limiting opening limits the rotation of the stopper 12 The active drill rod 5 is limited in movement, thereby stopping the rotation of the active drill rod 5. The above method realizes the limitation of the rotation of the active drill rod 5, but does not limit the axial sliding of the active drill rod 5, so that the active drill rod 5 can float axially for a certain distance during operation, which can effectively alleviate the axial impact generated by the drill rod during the threaded connection and disassembly process, thereby protecting the active drill rod 5 and other connecting parts and extending the service life of the equipment; when the active drill rod 5 floats axially, the impact force on the water braid part 26 can be reduced, the wear of the water braid part 26 can be reduced, and its overall durability and reliability can also be improved. A limiting section 13 is provided between the female joint 11 and the stop block, and the limiting section 13 is located between the chuck 8. When the chuck 8 is clamped to the limit position, there is still a gap between the chuck 8 and the outer periphery of the limiting section 13. When the chuck 8 moves to the limit position, there is still a gap between the chuck 8 and the outer periphery of the limiting section 13. The length of the limiting section 13 is greater than the length of the chuck 8, so that the clamping force of the chuck 8 will not directly act on the active drill rod 5, thereby avoiding the active drill rod 5 directly bearing the strong clamping force of the chuck 8, and avoiding the metal fatigue deformation of the active drill rod 5 during the reciprocating rotation process, thereby reducing fatigue damage and increasing the service life of the active drill rod 5; due to the axial floating design of the active drill rod 5, the impact force borne by the water braid part 26 during operation is reduced, which makes the water braid part 26 more evenly stressed, and the front end cover 7 includes an integrally formed flange and a sleeve, and the front end cover 7 is threadedly fixed to the chuck 8 through the flange to ensure the stability of the fixation.

[0075] like Figure 8 As shown, the clamping mechanism 3 includes a base, a swing unit, a guide sleeve assembly and a double clamping unit. Fig.11 As shown, the base is used to support the clamp, which is convenient for assembly and installation between the clamp and the drilling rig. The base includes a mounting plate 38, and a plurality of countersunk through holes for connecting with the frame 1 are arranged on both sides of the mounting plate 38. A rear clamp mounting portion 39 and a front clamp mounting portion 45 are fixedly arranged on the mounting plate 38.

[0076] like Fig.12As shown, the rear clamp mounting portion 45 includes a front side plate 46, a rear side plate 47 and a rear clamp mounting position 49, a No. 1 through hole is opened in the middle of the front side plate 46 and the rear side plate 47, and a first opening is opened on the top of the front side plate 46 and the rear side plate 47. The first opening makes the top of the No. 1 through hole set on the front side plate 46 and the rear side plate 47 open and combined with the No. 1 through hole to form a U-shaped groove, the front side plate 46 and the rear side plate 47 are welded in parallel to the mounting plate 38, and 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 form a sliding guide cavity for the cava assembly with the inner walls of the front side plate 46 and the rear side plate 47 respectively, and the rear clamp 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.

[0077] like Fig.11 As shown, the front clamp mounting part 39 includes a front support plate 40 and a rear support plate 41, and a flip part is provided at the front end of the front clamp mounting part 39. Specifically, the flip part includes two flip plates 44, which are respectively welded to the front ends of the front support plate 40 and the rear support plate 41, and each flip plate 44 is provided with a flip hole 43. The front support plate 40 and the rear support plate 41 are welded to the mounting plate 38 in parallel, and 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 of the front support plate 40 and the rear support plate 41 is provided with a second opening that opens the through hole, and the width of the second opening is greater than or equal to the outer diameter of the large drilling tool. The top of the front support plate 40 and the rear support plate 41 are both installed with a reinforcing plate 42 by bolts, and a limiting protrusion is integrally formed at the center position of the bottom of the reinforcing plate 42, and the limiting protrusion can be inserted into the second opening, and the bottom of the limiting protrusion is tangent to the cylinder where the No. 1 through hole is located.

[0078] The swing unit is disposed between the front support plate 40 and the rear support plate 41, and there is a gap between the bottom of the swing unit and the mounting base plate to facilitate the swing or flipping of the swing unit. Specifically, the swing unit includes a swing body 50, a driving member 68 and a pin shaft, such as Fig.13As shown, 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 telescoping 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 operation, the pin shaft is not connected to the hinge shaft seat 55.

[0079] 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 semi-circular guide sleeve 65 as Fig.16 shown. The outer diameter of the semi-circular 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 counterbore through hole is provided on the end face of the large diameter section 67, and it is screwed to the rear side plate 47 through the counterbore through hole. After installation, the notch direction of the semi-circular guide sleeve 65 is the same as the opening direction of the first opening.

[0080] 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 Fig.17 、 Fig.18 shown, 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 Fig.10 shown, 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 counterbore 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 screwing the screws through the counterbore through hole, realizing the axial limit of the swinging body 50.

[0081] An inner guide sleeve 63 and an outer guide sleeve 64 are provided at both the front and rear ends of the front clamp 56. When the drill rod enters or exits the clamp, the guide sleeve limits the deviation of the drill rod in the circumferential direction, ensuring that the drill rod is always within the range that can be clamped by the clamp, while protecting the clamp and the drilling rig power head from damage caused by excessive deviation of the drill rod. Since the rear clamp 57 is closer to the power head, the drill rod is less deviated by the active drill rod 5 of the power head, so the rear clamp 57 only needs a semi-ring guide sleeve 65 to adapt to drill rods of different outer diameters.

[0082] When the outer guide sleeve 64 and the inner guide sleeve 63 are installed at the same time, the clamp is suitable for drill rods with smaller outer diameters (generally having a specific outer diameter value for a specific drilling rig); when the outer guide sleeve 64 is removed and only the inner guide sleeve 63 is used, it is suitable for drill rods with larger outer diameters.

[0083] At the same time, the inner diameter of the outer slip 60 matches the outer diameter of the larger drill pipe that the clamp is suitable for, 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 that the clamp is suitable for. Combined with the quick disassembly and assembly method of the inner slip 58, the clamp of the present application can be applied to drill pipes of two outer diameters during construction, but when the pin is connected to the articulated shaft seat 55, that is, when the working condition is turned over, the inner guide sleeve 63 and the outer guide sleeve 64 need to be completely removed.

[0084] When in use, you can choose to use the guide sleeve assembly at the same time or remove the outer guide sleeve 64, or remove both the inner guide sleeve 63 and the outer guide sleeve 64, according to the size of the rotating rod diameter, and pass the pin shaft through the flip hole 43 to connect with the hinge shaft seat 55, so that the connection between the swing body 50 and the front clamp mounting part 39 is transformed into a connection mode of the flip working condition, so that the front clamp 56 is flipped out of the base through the swing body 50 to adapt to the guiding work of small-diameter drill rods, the guiding work of large-diameter drill rods and the installation work of large drilling tools respectively.

[0085] The double clamping unit includes a rear clamp 57 and a front clamp 56. The rear clamp 57 and the front clamp 56 both include a slip assembly and a clamping cylinder. The slip assembly includes an inner slip 58 and an outer slip 60. Fig.14 , Fig.15 As shown, the inner sides of the inner slip 58 and the outer slip 60 are provided with bumps or tiny sharp teeth, so as to increase the friction coefficient of the inner sides of the inner slip 58 and the outer slip 60 and reduce the probability of the drill pipe slipping.

[0086] like Fig.15 As shown, the front projection of the inner cava 58 is a "cross" shape, the middle section cross section of the inner cava 58 is an arc shape, and bosses 59 are symmetrically provided on the upper and lower sides. The side of the boss 59 facing the center of the through hole is provided with a countersunk through hole for installing screws connecting the outer cava 60 and the inner cava 58; Fig.14As shown, a rectangular plane 61 is provided on the inner surface of the outer cava 60, and a threaded hole is provided on the rectangular plane 61. Two clamping blocks 62 are vertically provided on both sides of the rectangular plane 61. The surfaces of the clamping blocks 62 and the rectangular plane 61 that are close to each other form four stop surfaces, and extend mutually through the clamping blocks 62 on the same side to form two arc surfaces. The diameter of the arc surface matches the larger drill pipe diameter and the outer diameter of the inner cava 58; the arc surface and the four stop surfaces are combined to form an installation space for the inner cava 58.

[0087] The front projection of the inner slip 58 is a "cross" shape, and four positioning planes are symmetrically arranged on the left and right sides, which cooperate with the four stop planes corresponding to the outer slip 60 to realize the positioning of the inner slip 58 along the front and rear axial direction of the clamp. The positioning of the inner slip 58 in the radial direction of the arc (i.e. the extension and contraction direction of the clamping cylinder) is realized by the screws connected to the outer slip 60.

[0088] This positioning method makes good use of the advantage of high tensile strength of threaded connection, while avoiding its weak shear strength, greatly reducing the possibility of deformation of the slip positioning parts.

[0089] When the inner slip 58 is seriously worn or needs to be replaced from a drill rod with a smaller outer diameter to a drill rod with a larger outer diameter, the inner slip 58 needs to be removed. Simply retract the clamping cylinder and unscrew the connecting screws between the inner slip 58 and the outer slip 60 to remove the inner slip 58. At this time, the outer guide sleeve 64 needs to be removed simultaneously so that the guide sleeve of the front clamp 56 fits the drill rod. The installation steps are the opposite.

[0090] The clamping cylinder includes two cylinder barrels and corresponding piston rods. The two cylinder barrels are respectively connected to the rear clamp mounting position 49 and the front clamp mounting position 52 by bolts. The piston rod extends toward the center from both sides of the clamp. The piston rod is welded with an output shaft, and the output shaft is bolted to the external cava 60, so that the clamping and loosening of the cava can be achieved through the reciprocating movement of the piston rod.

[0091] The specific implementation process is as follows:

[0092] The brake assembly 16 is in a braking condition, the hydraulic motor cannot drive the active drill rod 5 to rotate, and the power head can also resist the counter-torque generated by the torsional deformation of the drill rod in the hole, which is suitable for the directional drilling condition of the drilling rig, and the power head does not drive the drill rod to rotate; the brake assembly 16 is in a loosening condition, and the hydraulic motor drives the active drill rod 5 to rotate forward and reverse; it is suitable for the rotary drilling and drill rod connection and disconnection conditions of the drilling rig, and the power head drives the drill rod to rotate, and the hydraulic system of the chuck 8 is in a low-pressure clamping state during the drilling process; during the drilling process, if the drill rod breaks and other accidents occur, resulting in the drill rod being unable to be removed, a special salvage drilling tool must be used for salvage drilling. Put the chuck 8 in a loose state, disassemble the braid 26, the active drill rod 5, and the connecting shaft 27; use the chuck 8 to clamp the salvage drilling tool for drilling, and the chuck 8 is in a high-pressure clamping state.

[0093] The chuck 8 hydraulic system with pressure graded control function is used to control the clamping pressure of the chuck 8. Combined with the setting that the diameter of the limit section 13 of the active drill rod 5 is slightly smaller than the clamping inner diameter of the chuck 8, it not only improves the stress condition of the active drill rod 5, but also avoids the energy waste 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 salvage drilling.

[0094] When the active drill rod 5 needs to be inspected and replaced, since the main shaft 6 is provided with a receiving hole 9 for the active drill rod 5 to pass through, the staff can directly slide the active drill rod 5 in the receiving hole 9 and take it out from the rear of the main shaft 6, thereby improving the speed of disassembling the active drill rod 5. At the same time, the space at the rear end of the main shaft 6 is relatively ample. If the active drill rod 5 is taken out from the front of the main shaft 6 according to the tradition, on the one hand, the front end cover 7 must 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 5. The above-mentioned arrangement can facilitate the staff to assemble the active drill rod 5 and then re-install it into the main shaft 6, thereby improving the installation speed of the active drill rod 5. By setting the brake assembly 16, the opening and closing of the active drill rod 5 can be adjusted in time.

[0095] Since the active drill rod 5 often needs to rotate in the opposite direction during the operation of the drilling rig, the connection position between the active drill rod 5 and the two-way joint 14 is prone to loosening. The glue dispensing process can be used to apply fastening glue on the male joint of the two-way joint 14 along an axial straight line, and then apply the glue symmetrically on the other side of the same male joint. When the male joint and the female joint are tightened, the fastening glue on the left end of the male joint will contact more circles of the female joint thread, and the fastening glue will be spread wider along the tightening direction. The further to the right, the fewer circles of contact between the fastening glue and the female joint thread, and the smaller the spread of the application. Therefore, when the male joint is screwed into the female joint of the active drill rod 5, the fastening glue previously applied in a straight line will be spread out, forming an approximately trapezoidal tape projected on the central symmetry plane of the joint, which is wider on the left and narrower on the right. The tape on one side is as follows: Fig.19 As shown, the other side is similar. This just complements the strength of the thread itself, and better equalizes the strength of the threaded connection, which not only ensures the reverse anti-loosening strength, but also facilitates later disassembly. When the external thread of the male joint of the two-way joint 14 connected to the drill rod is worn to a certain extent, the two-way joint 14 can be removed and the installation direction can be reversed, and the worn section of the two-way joint 14 can be fixedly connected to the active drill rod 5 by glue. Since the thread of the male joint connected to the active drill rod 5 is fixedly connected during work, no wear will occur. The swapping of the threads at both ends is equivalent to the double-headed joint being used twice, and its life is also equivalent to twice that of the previous integral active drill rod 5.

[0096] Under normal construction conditions, it is sometimes necessary for the drill rod in the front clamp 56 to rotate relative to the drill rod in the rear clamp 57 or the power head at a small angle, such as pre-loosening the drill rod joint, and the power head rotates at a fast speed, making it difficult to control the rotation angle. At this time, the front clamp 56 is not equipped with a flip pin, and the inner guide sleeve 63 is used as the central axis to achieve reciprocating swing within 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 clamp 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 clamp 56 is raised and the right end is lowered.

[0097] When a large drilling tool needs to be installed, or when the swing body 50 needs to be removed as a whole, the swing body 50 needs to be turned over as a whole out of the base for operation. The turning process is as follows: install the turning pin and the related pin fixing parts 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 clamp 56; at this time, the central axis of rotation of the front clamp 56 is switched to the turning pin, and the front clamp 56 can be driven by the driving member 68 to rotate around the pin in the turning hole 43; the corresponding relationship between the extension and rotation direction of the driving member 68 is the same as the swinging working condition.

[0098] According to the lever principle, since the rotation fulcrum moves toward the driving member 68, when the piston rod of the driving member 68 is retracted, the left end of the front clamp 56 rotates more than the normal construction condition under this working condition, and the swing body 50 can be turned clockwise over the center of the base, so that it is almost completely exposed from the base. At this time, if the reinforcing plate 42 on the front and rear support plates 41 of the base is removed, a very spacious space is formed inside and on the top of the front clamp 56, and a large drilling tool can be directly placed from top to bottom.

[0099] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A mining drill rod installation device, characterized in that: It includes a frame, on which a power mechanism and a clamping mechanism are installed. The power mechanism is used to transmit the rotational and propulsion power required for the installation and disassembly to 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, 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 gearbox includes a gear shaft and multiple stages of gears. A transmission shaft connected to the gear shaft is provided inside the brake assembly, and the brake assembly performs rotational braking on the transmission shaft. The end of the main shaft is installed with a main drill pipe, and a receiving hole through which the main drill pipe can pass is opened inside the main shaft. A two-way joint is also detachably connected to the end of the main drill pipe.

2. The mining drill rod installation device according to claim 1, characterized in that: The clamping mechanism includes a rear gripper mounting part and a front gripper mounting part fixedly arranged on the frame. A rear gripper is provided on the rear gripper mounting part, and a front gripper is provided 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 first through hole. An opening for opening the first through hole is provided on the side away from the frame of the first through hole, and a large drill tool can pass through the opening. A flipping part is provided on the side of the front gripper mounting part, and the front gripper can flip around the flipping part and move away from the opening of the front gripper mounting part.

3. The mining drill rod installation device according to claim 2, characterized in that: Both the front gripper and the rear gripper 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.

4. The mining drill rod installation device according to claim 3, characterized in that: Convex blocks or fine pointed teeth for increasing the friction with the surface of the drill pipe are provided on the inner surfaces of both the inner collet and the outer collet.

5. The mining drill rod installation device according to claim 4, characterized in that: The front gripper further includes a swing body. The clamping oil cylinders are installed at both ends of the swing body. A driving part is hinged on the frame, and the output shaft of the driving part is hinged to the bottom of the swing body below the flipping part.

6. The mining drill rod installation device according to claim 5, characterized in that: 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. A second through hole is provided 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 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 of the support plate symmetrically arranged front and back on the swing body, and the large diameter section is coaxial with the first through hole of the front gripper mounting part.

7. The mining drill rod installation device according to claim 6, characterized in that: The guide sleeve assembly further includes a half-ring guide sleeve. The half-ring guide sleeve is coaxial with the guide sleeve and is fixedly connected to the rear gripper mounting part. The notch direction of the half-ring guide sleeve is the same as the direction of the opening.

8. The mining drill rod installation device according to claim 7, characterized in that: The swing body includes a swing support plate with a "凵"-shaped cross-section. Front gripper mounting positions are fixedly arranged 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, and the cylinder barrels are respectively symmetrically and fixedly installed on the front gripper mounting position and the rear gripper mounting position. The output shaft is slidably arranged inside 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.

9. The mining drill rod installation device according to claim 8, characterized in that: The swing body also includes a front lining plate, which is fixedly connected to the top of the swing support plate and forms a slip guide cavity with the swing support plate that matches the outer dimensions of the external slip. The slip assembly is slidably arranged in the slip guide cavity.

10. The mining drill rod installation device according to claim 9, characterized in that: A swing ear seat fixedly connected to the lower part of one side of the swing body and an articulated shaft seat corresponding to the flip part are fixedly provided, and the swing ear seat is articulated with a driving member for driving the swing body to swing around the flip part; the driving member is a retractable member, one end of the driving member is articulated with the frame, and the other end is articulated with the swing ear seat.

11. The mining drill rod installation device according to claim 10, characterized in that: The front clamp mounting part includes a front support plate and a rear support plate, which are fixed in parallel on the mounting plate, 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.

12. The mining drill rod installation device according to claim 11, characterized in that: The opening sides of the front support plate and the rear support plate are detachably connected with reinforcement plates.

13. The mining drill rod installation device according to claim 12, characterized in that: The brake assembly includes a brake cover, a clamping piston and a releasing piston. A sliding shaft is provided inside the brake cover. One end of the transmission shaft extends into the center of the clamping piston. There are multiple slips distributed circumferentially of the transmission shaft. The clamping piston is sleeved on the slip and can move axially. The surface of the slip away from the transmission shaft is an inclined surface. The surface of the clamping piston opposite to the slip is a slope surface matching the inclined surface of the slip. The clamping piston can slide through the slip to clamp the transmission shaft. The releasing piston is slidingly sleeved on the sliding shaft and can push the clamping piston to release the clamping.

14. The mining drill rod installation device according to claim 13, characterized in that: The brake cover is provided with oil inlet one and oil inlet two, and a first oil chamber is formed between the side of the release piston away from the clamping piston and the brake cover, and the oil inlet one can provide hydraulic oil to the first oil chamber, and a second oil chamber is provided 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 chamber.

15. The mining drill rod installation device according to claim 14, characterized in that: It also includes a water braid part that provides pressure fluid to the active drill pipe. The water braid part includes a connecting shaft, a core shaft and a water inlet assembly. The core shaft and the connecting shaft are both hollow shafts. The core shaft is fixedly connected and communicated with the connecting shaft. The other end of the connecting shaft is connected to the active drill pipe. The core shaft is communicated and rotatably connected with the water inlet assembly. A bearing seat is provided to support the core shaft. The bearing seat is provided with a core shaft support bearing sleeved on the outer periphery of the core shaft.

16. The mining drill rod installation device according to claim 15, characterized in that: One end of the active drill rod is a male joint, and the other end is a female joint. The male joint and the two-way joint are detachably connected. A stopper is provided on the outer periphery of the active drill rod. The outer periphery cross-section of the stopper is polygonal. An end cover is provided on the end of the main shaft. The end cover includes a front end cover and a chuck. The front end cover is fixed on the chuck. A limiting opening is opened on the front end cover. The front end cover limits the rotation of the stopper through the limiting opening.

17. The mining drill rod installation device according to claim 16, characterized in that: A limit section is provided between the female joint and the anti-rotation block, and the limit section is located between the chucks. When the chucks are clamped to the limit position, there is still a gap between the chucks and the outer periphery of the limit section.

18. The mining drill rod installation device according to claim 17, characterized in that: The length of the limiting section is greater than the length of the chuck.

19. The mining drill rod installation device according to claim 18, characterized in that: The water braid part also includes a connecting sleeve, which includes a connecting flange. The connecting flange is provided with a waist-shaped hole for bolts to pass through. The water braid part is fixed to the gearbox through the connecting sleeve, and a gap is left between the end face of the connecting sleeve facing the active drill rod and the end face of the connecting shaft.

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