158 results about "Down-the-hole drill" patented technology

The invention discloses a construction method applied to underground mine vertical shaft surrounding rock condition improvement. The construction method comprises the steps that a flat working face is cleaned, a temporary water nest is arranged for drainage, the drilling position is projected, and a down-the-hole drill is debugged; rock drilling is conducted according to the designed angle, direction and depth, propelling pressure is adjusted along with the depth, and cleaning and plugging are conducted after hole forming; grouting pipes with holes are used as pipe sheds to be driven into the holes, and are welded into a whole through annular steel bars; single-liquid-slurry and double-liquid-slurry segmented grouting is adopted, and the grouting pressure is controlled; during construction, grout diffusion and stratum deformation are monitored, after surrounding rock consolidation reaches the standard, weak blasting is matched with a small excavator for excavation, and after acceptance inspection is qualified, reinforcing steel bars are bound, formworks are installed, and concrete is poured. Compared with the prior art, the problems of collapse and water gushing of the vertical shaft under the strong weathering and water-rich geology can be solved, and the defects of insufficient supporting strength, grouting uniformity, construction efficiency and long-term stability in the traditional technology are overcome.

The vehicle body leveling mechanism of the heavy down-the-hole drill comprises a drill chassis and a track frame, installation frames are welded to the left side and the right side of the drill chassis respectively, leveling oil cylinder assemblies are connected to the installation frames in a rotating mode, the lower portions of the leveling oil cylinder assemblies are connected to the track frame in a rotating mode, and the number of the leveling oil cylinder assemblies is two. According to the large-scale down-the-hole drill, the gravity center position of the large-scale down-the-hole drill is adjusted by synchronously controlling the oil cylinders to stretch out and draw back through the leveling oil cylinders and the electromagnetic valve assemblies, leveling is achieved, and the large-scale down-the-hole drill is suitable for large-angle climbing operation by adjusting the gravity center position of the large-scale down-the-hole drill.

The utility model provides a hammering type rotatable drill bit for a down-the-hole drill. The hammering type rotatable drill bit comprises a drill bit shaft; a vent hole running axially along the center of the drill bit shaft; the horizontal gas channel guide pipe is connected with the exhaust hole; and a plurality of gas slot channels. Each gas passage conduit is embedded in the drill bit front drilling surface and extends from the level of the vent hole to the peripheral edge of the drill bit. Each gas slot channel extends outwardly from a radial location around a protruding drilling portion of the bit front middle region to a peripheral edge of the bit across a bit front drilling surface aft in a stepped shape. A portion of each gas channel conduit merges with the gas slot channel thereabove from a periphery of the intermediate protruding drilling portion to a portion of the peripheral edge of the drill bit to form a merged gas channel conduit-gas slot channel. The design can guide flushing air to horizontally and stably pass through the front drilling surface of the drill bit without any interference on the drilling ground, and does not weaken the drill bit structure at the same time.

The utility model provides a down-the-hole drill bit. The down-the-hole drill bit comprises a drill bit head part, a drill bit shoulder part and a drill bit rod part which are sequentially arranged in the axial direction. A first powder discharging groove is formed in the periphery of the drill bit head part, a first connecting hole is formed in the drill bit head part, and the first powder discharging groove is communicated with a central channel of the drill bit rod part through the first connecting hole; the drill bit shoulder part comprises a shoulder part body and a step which is formed by extending outwards from the periphery of the shoulder part body; a second powder discharging groove is formed in the periphery of the step, a second connecting hole is formed in the drill bit shoulder part, and the second powder discharging groove is communicated with the center channel through the second connecting hole. Meanwhile, the utility model further provides an impactor. Compared with the prior art, the down-the-hole drill bit and the impactor can better prevent the drill bit from being buried in a construction hole.

The externally-hung down-the-hole drill device comprises a drill rod, an excavator and an excavating arm, and the drill rod is movably connected with the front end of the excavating arm in parallel through a special-shaped connecting part; the rear end of the digging arm is connected with the digging machine; one end of the special-shaped connecting part is in a cylindrical opening shape; two groups of connecting pieces are respectively arranged at the other end of the special-shaped connecting part; one end of the special-shaped connecting part is sleeved with a turntable; the turntable is provided with a plurality of screw holes along the circumference; the rotary disc is in butt joint with the middle position of the rod wall of the drill rod and is fixedly installed in the mode that a plurality of bolts penetrate through the screw holes. A group of connecting pieces of the special-shaped connecting part are movably connected with the front end of the digging arm through a rotating shaft a; the upper side of the front end of the digging arm is movably connected with one end of a hydraulic cylinder B through a rotating shaft d; and the other end of the hydraulic cylinder B is movably connected with the other group of connecting pieces of the special-shaped connecting part through a rotating shaft b. The device is simple in structure, all parts are compactly connected, daily maintenance and overhaul are facilitated, and the maintenance cost and time are reduced.

The utility model belongs to the technical field of engineering machinery, and discloses a rotary speed reducer for a down-the-hole drill, which comprises a shell component, a speed reducing mechanism and a main shaft, the speed reducing mechanism is arranged in the shell component, the main shaft is rotatably connected to the shell component, a first end of the main shaft is connected with the speed reducing mechanism, and a second end of the main shaft extends out of the shell component. The main shaft is axially provided with a first air channel penetrating to the second end of the main shaft, the side wall, located in the shell assembly, of the main shaft is provided with a second air channel communicated with the first air channel, the shell assembly is provided with an air cavity and an air conveying hole communicated with the air cavity, and the second air channel is arranged in the air cavity in a communicated mode. According to the rotary speed reducer for the down-the-hole drill, the arrangement structure of the air channel in the main shaft is improved, the overall size of the speed reducer is reduced, the arrangement space of an internal speed reducing mechanism is prevented from being affected, high-pressure gas can be reliably and effectively conveyed, the gas leakage probability is reduced, and the service life of the speed reducer is prolonged. And the reliability and the stability of the high-pressure gas responding to the impactor are ensured.

The invention provides a circulating grouting advanced small guide pipe construction technology, and belongs to the technical field of surrounding rock construction, and the circulating grouting advanced small guide pipe construction technology comprises the following steps: S1, adopting a down-the-hole drill to form a double-ring hole in a tunnel wall; s2, inserting the slurry jetting pipe into the small guide pipe, exposing the tail end and connecting a slurry inlet pipe, connecting a grouting port of the small guide pipe with a steel gate valve for sealing, and connecting the tail part with a slurry return pipe through a three-way valve; s3, the prepared slurry enters a slurry storage barrel through a slurry inlet pipe, a slurry jetting pipe, a small guide pipe, a surrounding rock crack and a slurry return pipe, grouting is conducted on the tunnel vault from the two sides in two sequences, cement slurry is poured at the initial pressure of 0.5 MPa, stepped pressure increasing is conducted, and pressure increasing is stopped till the final pressure is reached; s4, in the grouting process, grouting data are collected in real time, and grouting parameters are regulated and controlled; and S5, after grouting is finished and mechanical hole sealing is conducted, manual filling and hole sealing are conducted, and the problem that the reinforcing effect of tunnel vaults and other parts is not ideal due to the fact that it is difficult to ensure that grout is evenly distributed in surrounding rock cracks through a traditional technology is solved.

1. The name of this design product: down-the-hole drill. 2. Application of this product design: used for drilling operations before underground mines and engineering blasting. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model relates to the technical field of operation machinery, and discloses a ladder stand device for a down-the-hole drill and the down-the-hole drill. The crawling ladder device for the down-the-hole drill comprises a first pedal, a second pedal, a third pedal and a fourth pedal, the first pedal is arranged on the dust collecting pipe mounting side of an upper vehicle platform of the down-the-hole drill, and the first pedal covers a dust collecting pipe; the second pedal is arranged on the dust collecting pipe mounting side and located above the first pedal, and the second pedal and the first pedal form a step structure for getting on and off the vehicle. The first cover plate is arranged above the dust collecting pipe, so that a worker can be prevented from directly stepping on the dust collecting pipe in the process of getting on and off the vehicle, the dust collecting pipe is protected, and the service life of the dust collecting pipe is prolonged. Besides, compared with the mode that step structures are arranged on the left side and the right side of the getting-on platform, and the first pedal and the second pedal are arranged on the dust collecting pipe installation side of the getting-on platform, the width of the down-the-hole drill can be prevented from being increased, and the influence on transportation of the down-the-hole drill is reduced.

The invention relates to the technical field of down-the-hole drill ball tooth drill bit wear measurement, in particular to a down-the-hole drill ball tooth drill bit wear value real-time measurement method and system, and the method comprises the steps: carrying out the optimization and registration of an initial three-dimensional model, and obtaining an overall wear quantized value of a down-the-hole drill ball tooth drill bit; analyzing a mapping relation between the while-drilling parameters and the overall wear quantized value, and constructing a database between the while-drilling parameters and the drill bit wear value; deriving a dimensionless variable according to a dimensional analysis method and a database, and performing combined screening on the dimensionless variable, a second-order polynomial and a cross term to determine a dimensionless variable combination influenced by drill bit wear; and substituting the dimensionless variable combination into the multiple linear regression model to establish a mathematical relationship model between the drill bit wear and the while-drilling parameters, thereby realizing the real-time measurement of the wear value of the ball tooth drill bit of the down-the-hole drill. According to the method, non-dimensional variables of the while-drilling parameters are obtained based on dimensional analysis, the model is built in combination with multiple linear regression, the wear value of the ball tooth drill bit of the down-the-hole drill is measured in real time, and construction efficiency and safety are improved.

This utility model relates to a telescopic down-the-hole drill bit guide device, belonging to the technical field of drill bit auxiliary structures. The telescopic down-the-hole drill bit guide device includes: a guide bushing and a locking mechanism. The guide bushing has a chip removal groove on its side end, and ball bearings staggered with the chip removal groove are embedded in the side end of the guide bushing. The top of the guide bushing has a countersunk hole, and the interior of the guide bushing has a positioning groove communicating with the countersunk hole. The locking mechanism includes a bolt inserted into the countersunk hole, and the side end of the bolt head has an installation cavity communicating with the positioning groove. The locking block and the positioning groove are always positioned on the side of the bolt facing away from the axis of the guide bushing, ensuring that centrifugal force pushes the locking block outward during drill bit rotation, allowing it to penetrate deeper into the positioning groove and enhancing the bolt locking effect. This dynamic self-reinforcing mechanism effectively prevents bolt loosening, eliminating the need for adhesive injection to prevent loosening and removing residual adhesive from the source.

The utility model relates to the technical field of mining devices, in particular to a down-the-hole drill with a positioning function for mining tunneling, which comprises a base, a fixing frame is mounted on the top surface of the base, an operating rod is mounted on the inner side of the fixing frame, and a drill main body is mounted on the side wall of the operating rod; a movable groove is formed in the left side wall of the base; a positioning structure is mounted in the movable groove, the positioning structure comprises a movable plate, the right end of the movable plate is slidably mounted on the inner side of the movable groove, a through groove is formed in the top surface of the movable plate, and a storage groove is formed in the inner wall of the through groove. The positioning ring descends to be attached to the ground through cooperation of the guide frame and the spring, it can be guaranteed that the positioning ring vertically moves on the lower side of the drilling machine body so as to position the drilling position, meanwhile, the movable plate can move in the movable groove, the positioning structure can be stored, and the situation that the positioning effect is affected due to the fact that the positioning structure is deformed by external force is avoided.

The invention relates to the technical field of photovoltaic support miniature cast-in-place pile construction, and discloses a photovoltaic support miniature cast-in-place pile construction method which comprises a crawler-type down-the-hole drill, an air compressor, a drill hole, a sleeve, a reinforcement cage, pouring concrete, a lower stand column, a pile casing and a concrete vibrating rod. Compared with a traditional rotary drilling rig and a percussion drilling rig, the drilling rig has the advantages that hole forming is achieved through dry operation, mud pits do not need to be constructed, damage to vegetation and soil of the mountain land is reduced, construction noise is low, green construction is achieved, and the drilling rig is suitable for large-scale popularization and application. The device can effectively drill holes in both hard rocks and soft soil layers, is particularly suitable for mountainous rugged terrains, is simple in structure and low in manufacturing cost, can simultaneously arrange a plurality of devices for simultaneous operation, improves the operation efficiency, and saves the construction period.

The utility model belongs to the technical field of down-the-hole drills, and discloses a driving device and a down-the-hole drill. The driving device comprises a hydraulic motor and a speed reducer, the speed reducer comprises a shell, a multi-stage planetary gear train structure and an output shaft, the hydraulic motor is arranged outside the shell, the multi-stage planetary gear train structure is arranged in the shell, and the multi-stage planetary gear train structure comprises a plurality of planet rows which are connected in series; a driving shaft of the hydraulic motor is in driving connection with an input piece of the multi-stage planetary gear train structure, and an output piece of the multi-stage planetary gear train structure is in transmission connection with the output shaft. Multi-stage speed reduction and torque increase of the speed reducer are realized through a multi-stage planetary gear train structure, so that the requirements of different working conditions of the down-the-hole drill can be met only by adopting a high-speed and small-displacement motor, the mechanical efficiency of a hydraulic motor is improved, the working oil consumption of the whole machine is reduced, the oil tank capacity of the whole machine is reduced, and the cost of the whole machine is reduced; in addition, the multi-stage planetary gear train structure is compact in overall structure, high in rigidity and high in impact resistance, and the service life of the driving device is prolonged.

The down-the-hole hammer comprises an outer cylinder and further comprises an impact assembly used for impacting a down-the-hole drill, the impact assembly comprises a large piston, a small piston and a connecting structure, a first inner cylinder is arranged in the outer cylinder, the large piston is slidably connected into the first inner cylinder, a second inner cylinder is arranged in the outer cylinder, and the small piston is slidably connected into the second inner cylinder. The connecting structure is used for separation and connection of the large piston and the small piston, when the large piston moves towards one side of the down-the-hole drill, the large piston moves to be connected with the small piston and impacts the down-the-hole drill, and when the large piston moves towards one side away from the down-the-hole drill, the large piston moves to be connected with the small piston and impacts the down-the-hole drill. The large piston firstly drives the small piston to move towards the side away from the down-the-hole drill to the first position, so that after the small piston is separated from the large piston, the small piston moves towards the side of the down-the-hole drill to impact the down-the-hole drill. Through the double-impact assembly of the large piston and the small piston, two times of independent impact, namely impact of the large piston driving the small piston and independent springback impact of the small piston, are achieved, and the impact frequency and the crushing efficiency of the down-the-hole drill are improved.

The invention discloses a combined down-the-hole drill bit capable of drilling and chambering. The combined down-the-hole drill bit is composed of a tool rest 1, a tool bit 2 and a locking and clamping device 3. The drill bit is installed on the down-the-hole drill, the drill bit locking and clamping device 3 is in the state of locking the tool bit 2, the drill bit has the same function as a common down-the-hole drill bit, a drill rod rotates while drilling in the drilling process, and a round hole 4 is formed in rock or concrete. When the drilling depth reaches the designed depth, the drilling machine is controlled to only drill without rotating, at the moment, the drill bit forms a rectangular pit 41 at the bottom of the hole, and steps 42 are formed on the two sides of the long edge of the rectangular pit. Drilling continues, a trigger bottom cap 321 at the bottom of the drill bit is extruded by a hole bottom step 42, the locking and clamping device 3 is unlocked, and the drill bit tool bit 2 can be unfolded after unlocking. After the machine is stopped and the drill rod is lifted, the drill rod is rotated by an angle, so that the bottom of the tool bit 2 falls on a rectangular hole step 42, a drilling machine is started to only drill without rotating, the drill rod is manually controlled to rotate, and the process is repeated until the step 42 is chiseled away by the tool bit, and then normal drilling operation is carried out. And continuously drilling to form a reaming section to the designed length.

The application relates to the technical field of slope construction, and provides an adjustable support for a down-the-hole drill on a slope. The adjustable support is used for linear drilling operation on an inclined slope surface with continuously changing slope, wherein the fixed frame is a frame structure, effectively reducing the overall weight of the support; at least three sliding legs are vertically detachably arranged on the fixed frame, and each sliding leg is in contact with the slope surface through a sliding cover, effectively increasing the contact area of the support and the slope, evenly distributing the weight of the support, reducing the single-point contact pressure of the support and the slope, and avoiding sinking of the support on the uneven slope; at least three inclined adjustment legs are used for adjusting the inclination of the fixed frame through telescopic movement, the support is adaptively adjusted to the angle of the slope with continuously changing slope, the support can adapt to the continuously changing slope, and the down-the-hole drill arranged on the support can also perform linear drilling on the continuously changing slope, thereby effectively avoiding drilling inclination and improving drilling quality.

The down-the-hole roller bit comprises a bit body, a channel for water to flow is formed in the bit body, the front end, facing the bit body, of the channel is divided into a plurality of flow channels and penetrates through the front end of the bit body, a plurality of first alloy teeth are installed on the end face of the front end of the bit body, and the down-the-hole roller bit further comprises a reaming sleeve and a locking assembly; the broaching sleeve is coaxially arranged at the front end of the drill bit body in a sleeving mode, a chamfering face is arranged at the front end of the broaching sleeve, a plurality of second alloy teeth are installed on the chamfering face in the circumferential direction, and the locking assembly locks the broaching sleeve on the drill bit body. The reaming sleeve is installed on the drill bit body, the diameter of the down-the-hole drill can be increased, the whole drill bit does not need to be replaced, and a drilled hole can be conveniently reamed through the down-the-hole drill.

The application discloses a kind of equipment for fixing teeth of down-the-hole drill bit, including structural frame, the structural frame is mounted for positioning drill bit tooth fixing tool, tooth fixing alignment feeding mechanism is arranged above tooth fixing tool, and pressure cylinder for pressing alloy tooth into drill bit is matched with tooth fixing alignment feeding mechanism, after the drill bit is fixed on tooth fixing tool, the area of the drill bit to be installed tooth hole is directly above the working area, the structural frame is mounted with rotating mechanism, the rotating mechanism includes vertically arranged rotating shaft and rotating disc coaxially mounted on rotating shaft and rotatable around rotating shaft, a plurality of stations are symmetrically arranged on rotating disc with rotating shaft as center, a type of tooth fixing alignment feeding mechanism is mounted on each station, and rotating disc sends a type of tooth fixing alignment feeding mechanism to the working area every time a station is rotated;The application solves the gap problem between alloy tooth and tooth hole after pressing tooth, and can greatly improve the quality of drill bit tooth fixing, thereby improving the reliability of down-the-hole drill bit.

The utility model discloses a fluffy coke cleaning device for a slag drying machine, and relates to the technical field of slag drying machines. Comprising a fluffy coke hopper, a fixing shell is fixedly arranged on the side face of the fluffy coke hopper, a propelling track is fixedly arranged in the fixing shell, and a down-the-hole drill pump is installed on the propelling track; the down-the-hole drill pump is connected with a positioning sleeve, the positioning sleeve movably penetrates through the fixing shell and the coke fluffing hopper, a sealing sleeve is installed in the fixing shell, and the positioning sleeve movably penetrates through the sealing sleeve; the end part of the positioning sleeve is connected with an alloy crushing head; and one fixed shell is connected with a maintenance assembly. According to the device, through the positioning function of the propelling track, the depth of the alloy crushing head entering the fluffy coke hopper is controlled, the alloy crushing head is prevented from being in contact with molten or overheated fluffy coke, and meanwhile, the alloy crushing head can be controlled in a targeted manner to strike and clean the hard fluffy coke; in addition, a positioning sleeve is arranged at the position of the fluffy coke in the slag drying machine, so that the flexibility of fluffy coke cleaning work is ensured, a support or a guide rail in the slag hopper does not need to be added, and a new fluffy coke point is avoided.

The invention relates to the technical field of down-the-hole drills, and provides a crawler-type underground down-the-hole drill which comprises a drill main body, the drill main body is provided with a walking assembly, a drilling assembly is arranged on the drill main body, and the crawler-type underground down-the-hole drill further comprises a telescopic arm arranged on the drill main body and used for driving the drilling assembly to move; the first rotary support is arranged at the moving end of the telescopic arm; the second rotary support is arranged at the rotating end of the first rotary support, the rotating end of the second rotary support is connected with the drilling assembly and used for driving the drilling assembly to rotate to adjust the drilling angle, and the rotating axis direction of the second rotary support is perpendicular to the rotating axis direction of the first rotary support. According to the technical scheme, the problem that in the prior art, the transposition punching efficiency is low is solved.

The invention discloses a multi-parameter fusion rock stratum fracture method based on measurement of parameters while drilling of a down-the-hole drill, and relates to the technical field of mining machinery. Comprising the following steps: in the drilling process of a down-the-hole drill, acquiring a measurement-while-drilling parameter, a borehole peeping image and a rock mass acoustic wave velocity; calculating the change rate of adjacent rock stratum structures, and judging the change positions of the rock stratum structures according to standards; respectively calculating local variable coefficients of the axial force and the drilling speed, and constructing a rock mass fracture index by combining the axial force variance, the drilling speed variance and the weight coefficient; and based on the measurement-while-drilling parameters, the borehole peeping image, the rock mass acoustic wave velocity and the rock mass fracture index, a fracture recognition model is constructed, and rock mass integrity judgment is completed by combining a strength judgment module. The method aims at determining the rock stratum fracture according to the real-time while-drilling parameters of the field down-the-hole drill, the drilling parameters in the drilling process can be accurately obtained in real time by means of the developed while-drilling system, the drilling specific energy of the down-the-hole drill is analyzed, and therefore the integrity index of the rock mass is determined.

The invention discloses a construction method for micro pile group foundation reinforcement and foundation underpinning in a subsurface tunnel, which comprises the following steps of: 1) pre-burying steel sleeves: pre-burying the steel sleeves at the front end and the rear end of a primary support inverted arch grid and between two adjacent grid steel frames during construction of a primary support structure; 2) improving the down-the-hole drill; (3) drilling a micro pile hole in the pre-buried steel sleeve; (4) forming a micro pile; (5) carrying out bearing capacity acceptance inspection on the micro piles; (6) waterproof treatment is conducted, specifically, waterproof treatment is conducted on the pile head after the tunnel waterproof isolation layer is constructed; and (7) tunnel secondary lining construction is conducted, the pile heads of the micro piles are anchored into a secondary lining bottom plate, and the secondary lining bottom plate is supported by the micro pile groups. The tunnel primary lining can be effectively prevented from being damaged and disturbed; main body structure sinking and cracking caused by foundation problems in the later period can be avoided, and the durability and the service life of a building are improved; and flexible construction can be carried out in a limited space in the tunnel by adopting a standardized construction process.

The application relates to a down-the-hole bit structure which comprises a bit body and a flow control assembly, an air channel and an auxiliary channel are arranged in the bit body, a powder discharge groove communicating with the air channel is arranged at the front end of the bit body, one end of the auxiliary channel communicates with the air channel, and the other end of the auxiliary channel penetrates through the side wall of the bit body and communicates with the outside; the flow control assembly comprises a mounting block, a driving assembly, a reset member and a stopper, the mounting block is fixedly arranged in the auxiliary channel, a main channel is arranged on the mounting block along the length direction of the auxiliary channel, the stopper slides in the mounting block along the length direction perpendicular to the main channel, the driving assembly and the reset member are arranged in the mounting block, the driving assembly is used for driving the stopper to move towards one side of the main channel to limit the speed, and the reset member is used for driving the stopper to move back towards the other side of the main channel. The air flow in the air channel is reduced to normal in the initial drilling period, manual pressure adjustment is not needed, the stability and drilling quality in the initial drilling period are improved, and the drilling operation efficiency is also improved.

The invention relates to the technical field of supporting devices, in particular to a telescopic down-the-hole drill supporting device. In order to solve the problems that a large amount of manpower, material resources and time cost are consumed in the erecting process due to the fact that existing down-the-hole drill operation depends on a scaffold supporting mode and the requirement for scaffold erecting accuracy is extremely high, and the stability and safety of drilling operation are affected due to the fact that erecting deviation easily causes drilling machine installation inclination, the following technical scheme is provided. A top frame is arranged above the bottom frame, a motor is installed on the top frame, the output end of the motor is connected with a down-the-hole drill, and the bottom frame and the top frame are telescopically adjusted to change the overall length of the device; and the connecting assembly is connected to one end of the bottom frame and one end of the top frame. According to the method, excessive dependence on scaffold erection accuracy can be avoided, manpower, material resources and time cost needed by erection are saved, meanwhile, drilling machine installation inclination caused by scaffold erection deviation is avoided, and the stability and safety of drilling operation are guaranteed.

The utility model discloses a down-the-hole drill bit, and relates to the technical field of down-the-hole drilling tools, the down-the-hole drill bit comprises a drill bit body, a plurality of rock debris grooves, diamond plane composite teeth, two air holes and two debris discharging grooves, the head end of the drill bit body is provided with a large plane, and the periphery of the large plane is provided with an annular inclined plane; the rock debris grooves are evenly distributed in the peripheral surface of the drill bit body. The diamond plane composite teeth comprise a plurality of side teeth which are uniformly distributed on the annular inclined plane and double rows of inner teeth which are reversely arranged on the large plane; each row of inner teeth comprises a central tooth and an outer edge tooth which are horizontally arranged on the same radius axis, and a cutting auxiliary tooth which is horizontally arranged on one side of the outer edge tooth; the two air holes and the two chip grooves are symmetrically formed in the large plane, one ends of the two chip grooves are correspondingly communicated with the two air holes respectively, and the other ends of the two chip grooves are correspondingly communicated with any two of the multiple rock debris grooves respectively. According to the down-the-hole drill bit, full-coverage cutting of a drill bit contact rock layer surface is achieved, the impact rock crushing efficiency of a soft rock stratum is greatly improved, and the drilling speed is increased.

The utility model discloses an automatic sampler for drilling cuttings of an open-air down-the-hole drill, which belongs to the technical field of soil sampling equipment and comprises a control box, two L-shaped connecting plates are fixedly connected to the outer surface of one side of the control box, and a collecting box is fixedly connected to the bottoms of the two L-shaped connecting plates. A transmission threaded rod is rotationally connected between the inner walls of the two sides of the control box, a transmission block is connected to the transmission threaded rod in a threaded mode, a transmission plate is fixedly connected to the bottom of the transmission block through two fixing rods, and a miniature electric telescopic rod is fixedly installed at the bottom of the transmission plate. Real-time collection of the soil drilling cuttings at the specific depth is automatically completed in the whole process, manual intervention is not needed, the working efficiency is very high, the sampling precision is high, analysis of different grades of elements contained in the drilling cuttings is facilitated, and guidance can be provided for next-step production.

The application discloses a dust collector intelligent control system and method and a down-the-hole drill, wherein the electric control system comprises a dust raising sensor, a motor rotating speed sensor, a power device rotating speed sensor and a controller; the dust raising sensor, the motor rotating speed sensor and the power device rotating speed sensor are electrically connected to the controller respectively; the hydraulic control system comprises a power device, a hydraulic oil tank, a hydraulic pump, a dust collector motor control valve and a dust collector; the hydraulic oil tank is connected to the hydraulic pump, the dust collector motor control valve and the dust collector through hydraulic pipelines respectively; the dust collector motor control valve is connected to the hydraulic pump and the dust collector through hydraulic pipelines respectively. The dust collector intelligent control system can realize the accurate control of the matching between the motor rotating speed and the dust removal effect when the dust collector is working, thereby effectively improving the construction site environment; the dust collector motor brake valve is arranged, the motor can be rapidly braked, and the dust removal efficiency of the filter element of the dust collector can be effectively improved.

This application provides a method, device, medium, and program product for monitoring wear of down-the-hole (DH) drill bits, relating to the field of drill bit wear monitoring technology. The method includes: collecting the same acoustic emission signal received by at least three acoustic emission sensors spaced axially along the drill rod of a DH drill rig during drilling, and recording the reception times of at least three signals for receiving the same acoustic emission signal; determining the actual propagation speed and axial position of the same acoustic emission signal along the drill rod based on the determined target axial spacing between the at least three acoustic emission sensors and the at least three signal reception times; identifying the same acoustic emission signal as a drill bit wear signal when the actual propagation speed is greater than or equal to a preset speed threshold and the axial position of the sound source is within the drill bit's working area; and determining the degree of drill bit wear based on the drill bit wear signal. This solves the technical problem of low accuracy in DH drill bit wear monitoring in related technologies.