186 results about "Core drill" patented technology

The application discloses a coal rock anti-burst method of large-range seam forming by remote controllable shock wave and hydraulic fracturing, and comprises the following steps: step one, detecting and recording the stress concentration degree of target coal seam or rock stratum; step two, drilling; step three, withdrawing the hollow drill rod, arranging the discharge electrode connected with the cable at the front end of the hollow drill rod, and sending the discharge electrode into the drill hole through the hollow drill rod; step four, sealing the hole by using a hole sealer and performing hydraulic fracturing; steps five to seven, completing multiple repeated electric pulse discharge operations; and step eight, testing the pressure relief effect of the coal seam or rock stratum. The method uses the drilling cuttings method, high-pressure hydraulic fracturing and high-voltage electric pulse to perform large-range cracking and pressure relief on the coal rock stratum, changes the stress state of the coal rock stratum, and reduces the stress concentration degree, so that the anti-burst purpose is achieved. The method is mainly applied to deep coal rock body tunneling roadways and coal mining working faces containing coal rock body impact tendency.

A method for operating a power tool, wherein the power tool is initially operated with a first combination of operating parameters such that a first working progress is obtained. During operation of the power tool with the first combination of operating parameters, the first working progress can be determined and compared with a second working progress that is obtained when the power tool is operated with a second combination of operating parameters. Depending on the result of the comparison, the power tool can continue to be operated with the second combination of operating parameters or the power tool can return to operation with the first combination of operating parameters. This comparison of the working progresses can be repeated until a maximum, i.e. optimal working progress is reached or found. A power tool, wherein the power tool is preferably in the form of a drill, preferably a core drill.

The utility model relates to the technical field of mining equipment, in particular to a multifunctional mining drilling rig which comprises two symmetrically-arranged supporting legs and a portal frame, a movable plate capable of moving up and down is arranged below the portal frame, and two hydraulic cylinders are symmetrically and fixedly connected to the bottom of the portal frame. Piston rods of the two hydraulic cylinders are fixedly connected with the top of the movable plate, the portal frame is rotationally mounted between the two supporting legs, a drill rod is rotationally mounted at the bottom of the movable plate, a drill bit capable of moving up and down is coaxially mounted at the bottom of the drill rod, the drill rod is hollow, and a plurality of sampling assemblies are mounted in the drill rod and located above the drill bit. Stable support is formed through the symmetrically-arranged supporting legs and the portal frame, the movable plate below the portal frame is driven by the hydraulic cylinder to move up and down, and accurate control over a drill rod and a drill bit is achieved; the drill rod is hollow, the sampling assembly is integrated in the drill rod, sampling can be carried out in the drilling process, and the working efficiency is improved.

The utility model discloses metal mine geology drilling equipment, which relates to the field of drilling equipment and comprises driving equipment, the driving equipment is mounted on a driving support through a moving frame, a platform is fixedly mounted on the driving support, a mounting part is fixedly mounted at the upper end of the platform, and the mounting part consists of a connecting ring and a mounting plate. The mounting plate is fixedly mounted on the outer wall of the connecting ring, a cleaning part is mounted on the platform, the cleaning part is composed of a mounting round pipe, a limiting insertion block, an anti-falling ring and bristles, the limiting insertion block is fixedly mounted on the outer wall of the mounting round pipe, and the mounting round pipe is fixedly sleeved with the anti-falling ring. The outer wall of the coring drill rod can be automatically cleaned, so that the cleaning burden of workers can be reduced, and the use efficiency of drilling equipment can be improved; and by arranging the mounting piece and the connecting piece, the cleaning piece can be conveniently disassembled and assembled, so that the cleaning piece can be conveniently replaced.

The invention relates to a control method of a concrete core drilling machine, which comprises the following steps of: firstly collecting and inputting drill specifications, concrete material characteristics and environmental parameters, matching similar working conditions from a historical database on the basis of the drill specifications, the concrete material characteristics and the environmental parameters, and calculating an early warning value which fits the current actual condition. In the drilling operation, the system collects torque, temperature, vibration and other multi-dimensional process data in real time, and the data are compared with an early warning value after being subjected to filtering processing. And when any data continuously exceeds the threshold value, corresponding early warning is triggered. And the system calls a fuzzy control rule table to make a decision according to the early warning type and degree, and generates and executes accurate control instructions such as adjustment of the rotating speed, the feeding speed or the cooling water flow. Therefore, it is ensured that the drilling process always operates in a safe and efficient state in a self-adaptive mode.

The utility model relates to a vertical hole grinding drill for replacing large-aperture coring in an obstacle breaking area of an underground diaphragm wall, and solves the problems that the underground diaphragm wall is of a high-strength reinforced concrete structure, the drilling diameter is large, the drilling depth is large, and a traditional coring drill bit is insufficient in transmission torque in the process of drilling a construction hole in the underground diaphragm wall. The device comprises a drill bit, a drill rod is connected to the upper portion of the drill bit, the drill bit comprises a connecting section, a sleeve section and a grinding section from top to bottom, a grinding disc is arranged at the bottom of the grinding section, annular teeth are arranged on the circumference of the bottom face of the grinding disc, a plurality of grinding heads are distributed in the middle of the bottom face of the grinding disc, and water injection holes are formed in the positions, at gaps of the grinding heads, of the bottom face of the grinding disc. And an overflow slurry discharging channel is formed between the outer wall of the drill bit and the drill hole. The grinding head is arranged on the grinding disc on the bottom surface of the drill bit and is matched with an annular tooth structure of an original coring sleeve to grind the bottom surface of a drill hole and slowly push the drill hole, so that the drilling construction requirements of large-depth and high-strength materials are met.

The present invention provides a core drilling device that prevents the core generated when drilling a through hole in an object from falling, and that can properly remove the chips generated when drilling the through hole. [Solution] The dry-type core drill device 1 includes a dust collector 9 and a core bit 2. The core drill device 1 is equipped with a fixing device that can be fixed to the upper surface of a concrete floor CF. The core bit 2 includes a cylindrical core bit body portion 11, a top plate portion 12 extending radially inward from the base end side of the core bit body portion 11, a through hole 12a formed through the top plate portion 12, and a catch lever 21 supported by the top plate portion 12 when inserted through the through hole 12a. The catch lever 21 is configured to be switchable between a first position in which it cannot engage with the fixing device 31 and a second position in which it can engage with the fixing device 31.

The invention discloses a wire-line coring drilling tool with a vibration rotating anti-blocking structure and a using method, the vibration rotating anti-blocking structure adopts the design of an overflow valve, a filter screen, a rotating tail wing and an overflow valve seat, and the filter screen is arranged before slurry enters the drilling tool, so that rock debris and solid particles carried by the slurry are effectively intercepted; the particles are prevented from being attached and accumulated on the outer surface of the filter screen to block the interior of the drilling tool; a rotating tail wing is innovatively and additionally arranged at the tail of the overflow valve, and a wavy structure is designed on the contact surface of the overflow valve and the valve seat; when slurry flows through, the overflow valve is driven to generate rotary vibration, then the filter screen is driven to act synchronously, centrifugal force is generated through rotation of the filter screen, and solid particles attached to the filter screen can be rapidly stripped under the combined action of vibration of the filter screen and continuous slurry scouring. By means of the design, flowing smoothness of slurry in the drilling tool is effectively guaranteed, the amount of rock debris and solid particles entering the drilling tool is obviously reduced, and therefore the service life of the drilling tool is prolonged.

This invention provides a telescopic millimeter-wave co-operated rock-breaking and coring drill bit and method based on pneumatic throttling drive, relating to rock-breaking technology. The drill bit includes: an annular cavity on the sidewall of the drill bit housing, with multiple through-hole waveguide windows at the bottom of the annular cavity; an annular piston, vertically slidable on the upper part of the annular cavity, with multiple throttling holes on the annular piston; a connecting sleeve, vertically slidable within the annular cavity and connected to the lower end of the annular piston, forming a movable air chamber between the connecting sleeve and the annular piston, with the throttling holes communicating with the movable air chamber; a waveguide disk, connected to the connecting sleeve at the upper part and with multiple waveguides at the lower end, each waveguide being movably inserted into a waveguide window; and an elastic element connecting the waveguide disk and the bottom of the annular cavity. The beneficial effects of this invention are: avoiding direct mechanical collision between the waveguide device and the rock, helping to reduce the risks of exposed and easily damaged waveguide end faces and jamming during downhole operations in existing technologies.

The invention relates to the technical field of rock core spectral analysis, in particular to a method, a device and equipment for detecting the original oil content of a rock core drilled by oil-based drilling fluid, and the method comprises the following steps: firstly, based on local waveform similarity of a rock core and a drilling fluid spectrum, accurately quantifying a wavelength-level oil-based interference degree and determining a fusion weight; constructing a drilling fluid fusion spectrum sequence reflecting the current rock core pollution characteristic, then finely correcting the rock core spectrum, and detecting the original oil content of the rock core according to an obtained corrected spectrum curve and a pre-constructed spectrum peak area-crude oil component volume percentage content relation equation; according to the method, the heterogeneity of the drilling fluid and the wavelength interference difference are fully considered, accurate denoising is implemented by constructing the self-adaptive background spectrum, the problem of excessive signal removal or residual caused by a traditional global difference method is effectively avoided, the corrected spectrum curve after correction can restore the original characteristics of the rock core more truly, and the accuracy of the rock core is improved. The accuracy of detecting the original oil content of the polluted rock core is obviously improved.

The invention belongs to the technical field of drilling and coring of road surface coring machines, and discloses an anti-pollution device of a road surface coring machine, the anti-pollution device comprises a splash-proof cylinder and a waste water collector, the splash-proof cylinder and the waste water collector are communicated through a drain pipe; a base is arranged at the bottom of the splash-proof barrel, a movable guide rail is arranged in the center of the middle of the splash-proof barrel, and the coring machine is arranged in the movable guide rail in a sliding mode. The coring machine can slide up and down along the moving track, when the coring machine slides downwards, a coring drill of the coring machine drills and cores on the road surface, cooling lubricating water used in the drilling process and chippings generated by drilling are thrown out by the rotating coring drill, and the chippings enter the waste water collector through the drainage pipe after being collected by the inner wall of the splash-proof barrel. The device has the beneficial effects that the working condition of splashing of waste water and chippings is effectively improved, the subsequent manual cleaning link is reduced, and the working procedure and cost are saved.

The application discloses a polar drilling hole wall directional coring drill, which comprises a shell, an upper hot melting drill bit, a reverse torsion mechanism, a cable chamber, a control system, a hole positioning mechanism, a supporting mechanism, a reaming mechanism and a coring mechanism, wherein the upper hot melting drill bit is assembled at the top of the shell, the reverse torsion mechanism, the cable chamber, the control system, the hole positioning mechanism, the supporting mechanism, the reaming mechanism and the coring mechanism are sequentially assembled in the shell from top to bottom, and the control system is connected with the upper hot melting drill bit, the reverse torsion mechanism, the hole positioning mechanism, the supporting mechanism, the reaming mechanism and the coring mechanism respectively. The application has the advantages that the coring direction can be accurately controlled, the demand of polar scientific research can be met, the drill is provided with the reaming mechanism, the auxiliary time is greatly shortened, the ice core tube can be telescoped to store the ice core in real time, the loss of the ice core is avoided, the drill adopts the modular design, the structure is simple and compact, the burden of polar logistics guarantee is reduced, and the drill is suitable for coring drilling in a harsh environment.

To provide a drill cover and core drill unit that improve safety and suppress a decrease in work efficiency. [Solution] The drill cover 20 comprises a cylindrical support portion 21 that is attached to the drill head 2a, and a cylindrical cover portion 22 that is movably supported on the support portion 21 along the axial direction of the support portion 21. When the cover portion 22 is overlapping the support portion 21, it exposes the connecting portion 5. When the cover portion 22 is pulled out from the support portion 21 toward the opposite side of the drill head 2a, it covers the radially outer side of the connecting portion 5.

The invention relates to a method for releasing a self-tightening insert tool (28) in a working direction (O) of a tool spindle (30) of a hand-held power tool (12), comprising at least the following steps (78, 82, 84): securing the insert tool (28) against rotation with a holding tool (38) when the tool spindle (30) is stationary, starting the tool spindle (30) in the opposite direction of working rotation (O), and stopping the tool spindle (30) after a defined number (N) of revolutions. The invention further relates to a system comprising a hand-held power tool (12), in particular a diamond core drill (10), an insert tool (38), in particular a core drill (70), and a holding tool (38), in particular a wrench (40), for carrying out the method.

The invention relates to the technical field of asphalt ground sampling, and discloses asphalt ground construction sampling equipment which comprises a rack, a supporting plate capable of vertically moving is arranged on the rack, a first servo motor is fixed to the supporting plate, a coring drill bit is fixed to a motor shaft of the first servo motor, and a coring head is fixed to the coring drill bit. A movable pushing piece is arranged in the coring drill bit, a plurality of circular convex blocks which are circumferentially distributed at equal intervals are fixed to the pushing piece, an L-shaped abutting frame is slidably connected to the supporting plate, a movable cleaning base is arranged on the rack, a scraping plate is arranged on the cleaning base, and a hollow rod is fixed to the scraping plate; the asphalt core sample is automatically separated from the coring drill bit, blockage and residues are reduced, the discharging speed is increased, the contact area of the pushing piece and the asphalt core sample can be reduced through the multiple round protruding blocks on the pushing piece, and therefore the adhesion amount of asphalt is reduced, the sampling amount is guaranteed, and the influence on the inspection result is avoided.

The application discloses an unstable deep borehole while-drilling type ground stress testing device and testing method, which comprises a pressurized water injection device, a high-pressure drill rod in communication with the pressurized water injection device, a rope core drill rod sleeved outside the high-pressure drill rod, a channel switching valve comprising a valve body, a water inlet arranged on the valve body, a first water outlet channel in selective communication with the water inlet, and a second water outlet channel, wherein the other end of the high-pressure drill rod is in communication with the water inlet, one end of the rope core drill rod is fixedly connected with the valve body, and the other end is fixed to the ground during the test, and the testing device comprises, in sequence, an upper packer, a center fracturing section, and a lower packer, the first water outlet channel is in communication with the upper packer and the lower packer in sequence, and the second water outlet channel is in communication with the center fracturing section; and a geological drill bit is used to remove obstacles when passing through unstable strata. The application not only can prevent the backflow of sewage in the borehole into the channel switching valve and the inner cavity of the packer, but also can pass through the unstable deep borehole to perform stress testing.

The invention relates to the technical field of reservoir excavation construction, and discloses reservoir basin excavation and filling construction equipment and a construction method thereof.The reservoir basin excavation and filling construction equipment comprises a guide frame, a U-shaped sliding base is slidably connected into the guide frame, a first motor is fixedly installed on the front side of the U-shaped sliding base, and the bottom output end of the first motor is connected with a drill rod assembly; a water injection assembly is rotatably connected to the upper half portion of the drill rod assembly, a threaded rod is rotatably connected to the interior of the guide frame in the length direction of the guide frame, a threaded sleeve is in threaded connection to the surface of the threaded rod, an elastic pushing part is arranged in the U-shaped sliding seat, and a connecting assembly is arranged on the surface of the elastic pushing part. Jet water flows act on the crushing teeth under the guidance of the boss edges, the cooling water flowing effect at the conical drill bit is enhanced, then the cooling water flows upwards along a gap between the blast hole and the hollow drill rod, the cooling water is matched with the gap to flow in the hollow drill rod, and therefore the purpose of improving the overall cooling effect of the drill rod is achieved.

The invention discloses a surveying and mapping geographic information sampling device for road construction, and belongs to the technical field of geographic sampling, the surveying and mapping geographic information sampling device comprises a soil sampling mechanism for sampling road soil to be constructed, and the soil sampling mechanism is provided with a recording mechanism for recording geographic information of walking of the device and a steering mechanism for recording steering information of the device; the recording mechanism measures the real walking distance through a recording wheel tightly attached to the ground, measurement errors caused by slipping of a traditional walking wheel are effectively avoided, the steering mechanism converts the steering angle into an electric signal through linkage of rotation of a steering wheel and displacement of a sliding block, and the electric signal is recorded; the precise coordinates of the device on the construction path can be calculated by combining the two; according to the soil sampling mechanism, a sampling motor drives a sampling barrel to achieve spiral downward composite motion, a hollow drill bit can stably cut into a soil layer with low disturbance, and an inner spiral groove in the hollow drill bit can continuously convey soil upwards into the sampling barrel when the drill bit rotates.

The utility model relates to a drilling tool deviation prevention device for a coring drill, which comprises a base capable of being arranged on the ground surface. The lower surface of the base is provided with a positioning insertion column assembly which can be inserted into the stratum to assist in limiting the position coordinates of the base on the earth surface. The freezing reinforcing assembly can be inserted into a stratum in a mode of surrounding a drill hole to form a frozen soil block surrounding the drill hole, and the anti-deviation assembly can be inserted into the expanded drill hole to limit and support a drilling tool in the drill hole. A plurality of refrigeration arc plates of the freezing reinforcing assembly are annularly arranged on an installation annular plate at intervals in the mode of surrounding the anti-deviation assembly, and the installation annular plate is detachably embedded in the lower surface of the base. According to the utility model, the stability and the limiting strength of a soil body can be improved by freezing a soil layer, and meanwhile, the drill rod is elastically buffered and pulled by utilizing the limiting support of the anti-deviation structure, so that the two-dimensional constraint of the drilling tool is realized.

This utility model discloses a grouting reinforcement device for foundation pit support pile walls, including a sliding advance platform slidably connected to the top of a drilling and grouting integrated machine. A grouting pipe is disposed above the drilling and grouting integrated machine, and a hollow drill pipe is threadedly connected to the left end of the grouting pipe. A rotating rod is rotatably connected to the rear side of the top of the advance platform via a bearing seat. Guide components are disposed on both sides of the rotating rod surface, and the guide components include rotating arms fixedly connected to the rotating rod surface. This utility model, through the coordinated use of the drilling and grouting integrated machine, the advance platform, and the drilling components, advances and drills the grouting pipe and the hollow drill pipe. With the cooperation of the rotating joint, grout is injected into the drilled location. Simultaneously, the rotating rod, guide components, and servo motor limit and guide the travel direction of the grouting pipe and the hollow drill pipe, thus achieving stable advancement and synchronous grouting to prevent collapse.

The application discloses a high-sharpness strong-self-sharpening bushing drill for ceramic matrix composite small-hole machining, which comprises a groove structure provided with a cutter base skeleton and composite particle size diamond abrasive particles brazed on the base skeleton, and the cutter base skeleton is mainly in a hollow cylindrical structure, a plurality of intersecting and uniformly distributed inner and outer grooves are designed on a working end, and the inner and outer grooves are all brazed with diamond abrasive particles, wherein the diamond abrasive particles in the inner and outer grooves can enhance the cutting capacity, and the particle size of the diamond abrasive particles in the inner and outer grooves is greater than that of the diamond abrasive particles on the outer circumferential surface of the working section (to ensure hole machining precision); when the diamond abrasive particles are abraded to cause the sharpness of the drill bit to decrease, the diamond abrasive particles in the groove structure start to fall off to participate in machining. The bushing drill structure design can keep the cutter in a high-sharpness state, improve the drilling quality and the service life of the bushing drill, and meet the requirements of high-efficiency, high-quality and low-cost machining of ceramic matrix composite small holes.

The invention relates to the field of small-caliber core drilling, in particular to a composite sheet drill bit for sandstone type uranium mine rope coring. The drill bit comprises a drill bit body, the drill bit body is arranged at the foremost end of a drilling pipe, the drill bit body is of an annular structure, a plurality of fan-shaped tire bodies are arranged at the top end of the drill bit body, a water gap is formed between every two adjacent tire bodies, composite sheets are further arranged on the drill bit body, the composite sheets are arranged between every two adjacent tire bodies, and every two adjacent composite sheets are symmetrically arranged in a staggered mode. The compact drill bit has the advantages that the compact drill bit is simple in structure, the service life of the compact drill bit can be effectively prolonged, and the rock core recovery rate of a sandstone stratum is increased. The inner and outer gauge protection strips can effectively reduce drill bit abrasion and reduce wire line coring drill lifting times. The drill bit is further characterized in that the rotation stability of the drill bit at the hole bottom is effectively improved through the design of the eight-wing composite sheet, jumping of a drilling tool is avoided, and the adaptability of the drill bit to different stratums is improved. In addition, the multi-water-gap design of the drill bit can prevent a cutting tool mud drum from being passivated, the problems of pump suffocation, difficulty in inner pipe salvage and the like in the drilling process are reduced, and therefore the drilling speed is increased.

The present application relates to a kind of mast assembly and hydraulic core drill, mast assembly includes main mast, vice mast, telescopic driver and two track supports;Main mast is slidably sleeved in vice mast, telescopic driver is set in main mast inside, and is connected vice mast;Track support includes support beam, first slide rail and second slide rail;First slide rail and second slide rail are parallelly arranged in the two sides of support beam, and three are Z-shaped;Two support beams of two track supports are symmetrically arranged in the two sides of main mast, two first slide rails form first track, and two second slide rails form second track;First track and second track extend along the length direction of main mast;First track is used to install the power assembly of clamping drill pipe;Main mast is slidably connected to drill main body by second track.It has beneficial effects, realizes the integrated function, compact structure, balanced stress, the comprehensive effect of efficient hole forming, adapts to the core exploration drill for the core performance demand of mast assembly.

This invention discloses a rapid assessment and precise repair method for the degree of pulverization in ballastless track bed concrete. By preparing concrete reference specimens of different strength grades, a correlation curve between pull-out strength and overall strength is established. Combined with probe diameter selection, surface grinding, and adhesive bonding techniques, a non-destructive and rapid detection of the pulverized layer is achieved. Specifically, the method includes: a preliminary preparation stage where specimens are prepared and a pull-out strength-strength model is established; an evaluation stage where layer-by-layer pull-out testing combined with precise hollow drilling quantitatively determines the depth and extent of pulverization; and a repair stage where the pulverized layer is replaced with a high-toughness material and a drainage slope is installed. This invention solves the problems of low efficiency, significant damage, and inaccurate repair associated with existing methods. Through parametric design and a modular system, it significantly improves detection accuracy and repair effectiveness. It is applicable to the maintenance of concrete structures such as high-speed railway track base plates, meets industry standards, and has the advantages of simple operation, low cost, and strong adaptability.

The invention discloses eccentric anti-blocking type reverse circulation drilling equipment and method, and belongs to the technical field of reverse circulation drilling rigs. The eccentric anti-blocking type reverse circulation drilling equipment comprises a construction platform and an equipment frame, and a power system, a transmission system and a reverse circulation drilling system are arranged on the frame; the reverse circulation drilling system comprises a hollow drill rod set connected with the transmission system, and the bottom of the hollow drill rod set is sequentially in butt joint with a reverse circulation box, a drill bit and the like. The reverse circulation box is composed of a circular upper box cover, a lower box cover and a cylindrical box body, and suction holes are formed in the side face of the box body. An eccentric shaft which is fixed with the upper and lower box covers and deviates from the axis of the box body is arranged in the box, a shaft sleeve is coaxially connected to the shaft, and a plurality of cleaning ring seats are axially fixed on the shaft sleeve; a cleaning lifting pin is elastically installed in each ring seat and can penetrate through the ring seats to abut against the suction holes. When the box body rotates along with the drill rod set, the eccentric shaft generates centrifugal force to push the cleaning ring base to move outwards (slide relative to the inner wall of the box body), the cleaning lifting pin extends outwards under elastic force to abut against blockages in the suction holes, automatic cleaning is achieved, and the deslagging efficiency is improved.

The utility model belongs to the technical field of maintenance tools, disclose a boiler manhole screw dismounting tool, this boiler manhole screw dismounting tool includes sleeve, elastic part, die block, lock nut and core drill bit, elastic part is located in the sleeve, and one end of elastic part is connected in the inside wall of sleeve, and die block is located in the sleeve and can butt with the other end of elastic part, under the action of elastic part, die block can be stably sleeved on screw, avoid in the process of dismounting die block and screw and separate, lock nut is arranged in the through -hole of sleeve and can butt in the outer peripheral wall of die block, to make die block can be fixed relative to sleeve, prevent die block slipping in the sleeve and influence die block to the dismounting of screw on the cover plate of boiler manhole, and core drill bit sets up in the sleeve, not only can dismount screw and open the cover plate of boiler manhole, convenient personnel enter the inside boiler and overhaul, and core drill bit can carry out reaming to the cover plate of boiler manhole, and the function is various, and convenient to use.

The application discloses a pressure balance ahead coring drill tool and relates to the field of geological drilling. The pressure balance ahead coring drill tool comprises a one-way mechanism, the bottom of the one-way mechanism is movably connected with a two-way circulation mechanism through threads, the surface of the two-way circulation mechanism is movably connected with a drill inner tube through threads, the bottom of the surface of the two-way circulation mechanism is movably connected with a drill outer tube through threads, the bottom of the drill inner tube is movably connected with an inner drill bit through threads, the bottom of the drill outer tube is movably connected with an outer drill bit through threads, the one-way mechanism comprises an upper joint, the inner cavity of the upper joint is provided with a valve seat, the bottom of the surface of the valve seat is sleeved with a first spring, and the two-way circulation mechanism comprises a double circulation joint. Through positive circulation of the gap between the inner tube and the outer tube and reverse circulation of the inner tube, the pressure balance ahead coring drill tool can realize optimization of a drill flow channel, pressure balance, and prevention of the situation that, in the process of brine mineral exploration drilling, a mine layer contains ore due to serious mud making, thereby causing a drill jam and the like, so that the problems in the background art are solved.

The application provides a hollow high-speed hole drilling bit, which comprises a hollow drill bit, a drill handle and a telescopic drill assembly, the drill handle is arranged at one end of the hollow drill bit, the telescopic drill assembly is arranged on the inner side of the hollow drill bit, the telescopic drill assembly comprises a telescopic drill bit, connecting rods and an adjusting turntable, a plurality of connecting rods are arranged on one end of the telescopic drill bit, one end of each connecting rod penetrates through the end of the hollow drill bit, a plurality of accommodating grooves for accommodating one end of each connecting rod are formed in the side wall of the drill handle, one end of each connecting rod extends to the outer side of the hollow drill bit and is embedded into the accommodating groove, a guide block is arranged on the outer side of each connecting rod, a plurality of guide grooves for accommodating the guide blocks are formed in the inner wall of the hollow drill bit, a plurality of tooth blocks are arranged on the inner side of each connecting rod in an axial direction, the adjusting turntable is arranged on the inner side of each connecting rod, a helical convex strip which is engaged with the tooth blocks is arranged on the outer side wall of the adjusting turntable, and the adjusting turntable is rotationally arranged at one end of the hollow drill bit; the adjusting turntable is rotated by a tool, the connecting rods are driven to move under the cooperation of the helical convex strip and the tooth blocks, and the telescopic drill bit is extended out of the hollow drill bit or retracted into the hollow drill bit, so that the hole drilling bit can be suitable for drilling requirements of two diameter sizes, the size of the drilled hole can be quickly switched, the hole drilling bit does not need to be frequently installed and disassembled, and the hole drilling efficiency is improved.

The utility model discloses an electrode coupling device for tunnel advanced detection, which relates to the technical field of tunnel engineering and engineering geophysical prospecting, and comprises a drill rod system, a hydraulic telescopic system and a multi-electrode telescopic system, the drill rod system comprises a hollow drill rod, the hydraulic telescopic system comprises a hydraulic oil cylinder and a transmission oil cylinder, the hydraulic oil cylinder is connected with the transmission oil cylinder, and the transmission oil cylinder is connected with the multi-electrode telescopic system. A plurality of round holes are formed in the side wall of the hollow drill rod in the axial direction of the hollow drill rod, hydraulic telescopic mechanisms are arranged in the round holes and connected with a transmission oil cylinder, the multi-motor telescopic system comprises an annular electrode rail and copper electrodes, the annular electrode rail is arranged in the round holes, and the copper electrodes are evenly distributed on the inner circumference of the annular electrode rail. By introducing the design that a plurality of electrodes are coupled into rock, the electrode coupling device is well coupled with surrounding rock, the grounding resistance of the electrode coupling device is reduced, the signal-to-noise ratio of original data is increased, and the quality and precision of advanced detection are further guaranteed.

The invention discloses a single-wall type closed sampler, a manufacturing process and a sampling method.The sampler comprises a transversely-arranged gas measuring sampling pipe and an inclined wing coring bit, the left end of the gas measuring sampling pipe is provided with a first female thread, and the right end of the gas measuring sampling pipe is provided with a first male thread; a second female screw thread is arranged at the left end of the inclined wing coring bit, and the inclined wing coring bit is mounted at the right end of the gas measurement sampling pipe; a high-low pressure conversion slide valve is installed in the gas measuring sampling pipe and arranged on the right side of the first female thread screw thread, the right end of the high-low pressure conversion slide valve is connected with the left end of an ejector rod assembly, the right end of the ejector rod assembly is connected with a ball core assembly, and a communicating cavity is formed in the high-low pressure conversion slide valve and connected with a flow supply channel. The right end of the flow supply channel penetrates through the wall of the gas measurement sampling pipe and is communicated with the outside of the gas measurement sampling pipe. According to the invention, the coring structure is simplified, and the technical problem that the existing closed sampling device cannot realize deslagging and cooling is effectively solved.