639results about "Reciprocating drilling machines" patented technology

The invention relates to the field of shield tunneling, and discloses a shield tunneling control method and system based on a rock-soil particle motion trail, and the method comprises the steps: fusion deployment of various types of high-precision sensors, intelligent anti-noise data collection and preprocessing, precise physical model construction, efficient numerical simulation optimization, and multi-parameter comprehensive detection and correlation analysis. And real-time data-driven adaptive control model construction, control instruction rapid generation and transmission, closed-loop feedback and continuous optimization are realized. According to the method, multiple links including fusion deployment of multiple types of high-precision sensors, intelligent anti-noise processing, physical model construction and the like are covered, all the links have a synergistic effect, data can be accurately obtained, data quality can be guaranteed, a simulation foundation can be provided, comprehensive evaluation, intelligent control and rapid instruction transmission can be achieved, continuous optimization is achieved through closed-loop feedback, and the method is suitable for large-scale popularization and application. And finally, the construction level in all aspects is improved, and complex engineering requirements are met.

The invention discloses a self-adaptive rock drilling control method and a drill jumbo. The self-adaptive rock drilling control method comprises the steps that S1, initialization is conducted, specifically, parameters including the quality of a drilling component, a drilling included angle, a calculation coefficient, target propulsion pressure, target impact pressure and control parameters are initialized based on a control system before operation; s2, drilling is conducted according to the initialized parameters, the number of drill rods is recorded by a drill rod number counter, and impact pressure compensation and propelling pressure compensation are conducted according to the increased number of the drill rods; s3, adjusting the output propulsion pressure based on the difference between the target rotation pressure and the actual rotation pressure to enable the actual rotation pressure to tend to the target rotation pressure, adjusting the impact pressure based on the relation between the effective impact pressure and the effective propulsion pressure to enable the effective impact pressure to tend to the target impact pressure, and ensuring that the effective rock drilling parameters at the drill bit are matched with the rock. It is guaranteed that the effective propelling pressure and impact pressure at the drill bit meet the requirements, and therefore the drilling precision and quality are guaranteed.

The utility model discloses a hydraulic rock drill which comprises a machine body composed of a machine base, a cylinder body, a middle body, a gear box, a gear box cover and a machine head which are sequentially connected, a first cavity for containing an impact piston and a second cavity for containing a bit shank are formed in the machine body, and a cooling lubricating cavity communicated with the first cavity and the second cavity is formed in the machine body. An air inlet chamber is formed in the machine base, and an air inlet communicated with the air inlet chamber is formed in the rear end of the machine base. The impact piston is provided with a central channel which is communicated with the air inlet chamber and the cooling and lubricating air chamber; an air passing channel which is communicated with a gap between the bit shank, the rotary assembly and the machine head and a gap between the bit shank and the machine head part is formed in the machine head; cooling and lubricating air introduced into the air inlet chamber enters the cooling and lubricating cavity through the center channel of the impact piston, sequentially passes through the bit shank, the gap between the rotary assembly and the machine head and the air passing channel, enters the gap between the head of the bit shank and the machine head and is blown out, and the situation that the cooling effect is poor due to the fact that air flow is poor after heat exchange is avoided.

The invention discloses a hydraulic reverse hitting impact power head which comprises a gearbox, a reverse hitting device and an impact device, and the reverse hitting device comprises a shell assembly, a drill rod and a reverse hitting piston. A control cavity is formed between the shell assembly and the reverse hitting piston, and a control oil way is further arranged in the shell assembly and the reverse hitting piston and connected with a high-pressure oil way and a low-pressure oil way in the impact device. The control cavity is used for forming a micro-pressure cavity when the power head works normally, and then the reverse hitting piston and the shell assembly are made to be close to the rear end side of the drill rod. The control cavity is further used for forming a high-pressure cavity only through communication between the control oil way and the high-pressure oil way in the process that the shell assembly drives the reverse hitting piston to move in the reverse direction to pull out the drill rod when the drill is stuck, then the reverse hitting piston is pushed to drive the drill rod to move in the reverse direction to pull out the drill rod, and the control cavity forms a micro-pressure cavity again when the drill rod is pulled out. According to the power head, the overall structure is simple and compact, oil is supplied from the interior of the impact device, automatic recognition and reverse hitting can be achieved when drill jamming occurs, and an energy accumulator does not need to be additionally installed.

The invention provides a large arch foot bench method based on a rigid support system, and belongs to the technical field of tunnel engineering. The large arch foot bench method based on the rigid support system comprises the following steps that S1, an advance support is constructed on the outer side of a tunnel primary support; s2, an upper step is excavated; s3, constructing a tunnel primary support with a large arch springing in an upper step range; s4, lagging behind the upper step for a certain distance, and excavating a lower step; s5, a lower step primary support in the lower step range is constructed; and S6, follow-up procedures are conducted according to a normal step construction method. The method combines the advantages of a pipe-roofing underground excavation technology, a shallow-buried underground excavation method and a large-arch-foot bench method, construction can be organized according to the conventional bench method under a rigid support system, a large-arch-foot tunnel primary support is arranged on an upper step, the influence on the upper step during excavation of a lower step can be obviously reduced, the implementation difficulty of the construction method is greatly reduced, the operability is high, and the construction efficiency is high. And the construction safety and the construction efficiency are guaranteed, and remarkable economic and social benefits are achieved.

The invention relates to the technical field of pile drivers, and discloses a pulse-coordinated self-adaptive regulation type road and bridge geology efficient pile driving device which comprises a vertical guide rail, a mounting part mounted on the side wall of the vertical guide rail and used for mounting a ground pulse tool, and a pulse part mounted on the mounting part and used for mounting a ground pulse tool. The pulse part is installed on the vertical guide rail and used for automatically and intermittently emitting pulse current to break a rock stratum, the piling part is installed on the vertical guide rail and used for piling and trepanning a road surface, the buffering part is installed on the piling part and used for buffering piling vibration force borne by the pulse part, and the piling efficiency is improved through cooperation of piling frequency and intermittent pulse current emission. When facing hard stratums such as rock stratums, pulse current automatically and intermittently emitted by the pulse part can generate electromagnetic force and shock waves in rocks, so that the rocks are fractured, the pile driver is effectively assisted to reduce the pile driving difficulty, and the pile driving efficiency is improved.

The present invention relates to a hydraulic rock drill, comprising a chassis, a rock drill body and a driving mechanism, wherein the driving mechanism is fixedly placed in the chassis, a guide rail is arranged on one side of the chassis corresponding to the driving mechanism, and a first slider and a second slider that can move along the guide rail are arranged on the guide rail; a rack arranged axially along the guide rail is arranged on the first slider, and the output end of the driving mechanism is meshed with the rack; the rock drill body is placed on the second slider, and the rock drilling end of the rock drill body extends out of the chassis, and the other end of the rock drill body is fixedly connected to the rack through a buffer device; the driving mechanism drives the rack to move axially along the guide rail, and the rack drives the rock drill body to move axially along the guide rail through the buffer device, and the rock drilling end of the rock drill body extends out of the chassis for rock drilling. Compared with the prior art, the present invention uses a buffer device for buffering, and uses a backstop block and a backstop bar to prevent the rock drill body from retreating significantly, thereby extending the service life of the driving mechanism, the backstop block and the backstop bar.

The invention discloses an underground portable percussion drill device based on pressure power generation, and belongs to the technical field of pressure power generation. The device comprises a drilling part, a dust discharging part, a self-electricity-storage part and a percussion drill main body part, the drilling part comprises a percussion drill rod, a rotating sleeve, a mounting seat and a telescopic dust cover, and the dust discharging part comprises a dust discharging pipeline, a filter screen and a small air blower; the self-power-storage part comprises a piezoelectric conversion device and a current integration device; the piezoelectric conversion device converts mechanical energy generated by vibration of the percussion drill rod into electric energy by cutting magnetic induction lines through the permanent magnet, and the current integration device generates stable direct current from generated unstable alternating current and directly stores the stable direct current into the storage battery to supply power to the percussion drill. The problem that a traditional electric percussion drill needs to be charged frequently is solved, and the viscosity problem caused by long-time use of a hydraulic percussion drill is also solved; the operation duration of a traditional percussion drill is prolonged, meanwhile, relevant policies of national green mines are responded, and energy conservation and emission reduction are achieved.

The invention provides a reverse hitting device used for a rock drill, the rock drill comprises a machine body, a bit shank protruding from the machine body and a drill rod fixed to the bit shank, the drill rod comprises a drill bit and a connecting sleeve, the connecting sleeve is arranged on the bit shank in a sleeving mode, the diameter of the connecting sleeve is larger than that of the drill bit, and the diameter of the connecting sleeve is larger than that of the drill bit. The reverse beating device comprises a fixing part fixed to the machine body, a reverse beating oil cylinder fixedly connected with the fixing part and an abutting assembly connected with the reverse beating oil cylinder. According to the reverse beating device and the rock drill, the reverse beating device can be used in cooperation with a common rock drill, and normal work of the rock drill cannot be affected; the reverse beating device is simple in structure and convenient to use, the rock drill using the reverse beating device can achieve the reverse beating function when a drill is stuck, quick-wear parts are easy to replace, and the user experience feeling is good.

The hydraulic rock drill comprises a machine body composed of a machine tail part, a cylinder body part, a middle body part and a machine head part which are connected in sequence, and the machine tail part and the cylinder body part jointly form an impact assembly. The middle body part comprises a rotary assembly and a buffer assembly, and the machine head part comprises a washing assembly; the impact assembly and the buffer assembly jointly form a first cavity used for containing an impact piston. The rotary assembly and the flushing assembly jointly form a second cavity used for containing the bit shank, and the first cavity is communicated with the second cavity; the impact assembly introduces hydraulic oil into the first cavity, the impact piston can be pushed by the hydraulic oil to reciprocate along the central axis of the first cavity, and the head of the impact piston can penetrate out of the first cavity, enter the second cavity and impact the tail of the bit shank. The tail part of the bit shank is inserted into the rotary assembly and drives the bit shank to rotate along the central axis through the rotary assembly; a central hole extending towards the head of the bit shank is formed in a front-section rod body of the bit shank, and the flushing assembly injects flushing media into the central hole.

The invention provides a vehicle window control method, electronic equipment and a vehicle, and the method comprises the steps: responding to a received collision signal, and starting a collision window descending judgment execution step: obtaining vehicle speed information and each vehicle window opening degree; and in response to determining that the target window descending vehicle window exists and the duration that the vehicle speed information is smaller than or equal to the first preset vehicle speed reaches the preset duration, sending a window descending request to a vehicle window driving device corresponding to the target window descending vehicle window, and controlling the vehicle window driving device to adjust the vehicle window opening degree of the target window descending vehicle window to the first preset opening degree. Condition judgment for triggering the collision window descending strategy is reasonable and effective, the overall safety performance of the vehicle is enhanced, and optimization of an active safety system of a modern vehicle is facilitated.

The invention discloses a hydraulic tunnel drilling trolley excavation construction device, and relates to the technical field of tunnel construction equipment.The hydraulic tunnel drilling trolley excavation construction device comprises a trolley and a punching mechanism, a plurality of walking wheels are arranged at the bottom of the trolley, a lifting frame is slidably arranged on the trolley in the vertical direction, and a moving frame is slidably arranged on the lifting frame in the horizontal direction; a supporting arm is rotationally arranged on the moving frame, a mounting frame is rotationally arranged at the end of the supporting arm, and the punching mechanism is arranged on the mounting frame and used for punching holes in the tunnel wall. According to the hydraulic tunnel perforating device, the labor intensity of workers can be reduced, the perforating efficiency and precision can be improved, meanwhile, the perforating position and angle can be flexibly adjusted, the hydraulic tunnel perforating device adapts to the complex and changeable hydraulic tunnel construction environment, and the perforating requirements of different positions and angles are met.

The invention relates to the technical field of compaction pile construction, and discloses a construction method of an along-track bar hammer stone breaking compaction pile made of site original soil and stones, which is characterized by comprising the following steps: S1, foundation treatment is carried out; s2, a foundation pile is formed; s3, a composite foundation is formed; and S4, manufacturing a mattress layer, and coordinating settlement difference. According to the construction method disclosed by the invention, the hammer body can be used for completing the construction of all working procedures of trepanning and pile forming of the pile body (trepanning, stone breaking, soil squeezing, hole forming, chambering and pile end bearing layer manufacturing; the combined action of one hammer with multiple purposes, one machine with multiple purposes and one method with multiple purposes is achieved, the combined hammer can adapt to various different geological conditions and the design requirements of different buildings and structures, and meanwhile various miscellaneous fill rocks existing on the site can be converted into various miscellaneous fill rocks. Various effects (original soil and stone bodies, a dynamic consolidation construction method, pile bodies with different strengths, soil bodies among the piles and the like) formed after treatment are combined together to form a raft-shaped high-strength foundation bearing layer.

The utility model relates to a raking pile rock-socketed percussion drill hole-forming barrel drill bit, which belongs to the technical field of barrel drill bits, and comprises a rock percussion drill hole-forming barrel drill bit body, a rotary drilling machine, a connecting shaft, a flange plate and a bolt, and a reinforcing mechanism is arranged at the top of the rock percussion drill hole-forming barrel drill bit body. The reinforcing mechanism comprises a reinforcing sleeve fixedly installed on the peripheral wall of the connecting shaft. According to the raking pile rock-socketed percussion drill hole-forming barrel drill bit, the overall compressive strength of a connecting shaft is enhanced through the effect of a reinforcing sleeve, a connecting plate is fixed through the effect of an arc-shaped mounting base and a screw, and meanwhile an arc-shaped supporting plate is mounted in the reinforcing sleeve; part of pressure is shared to the rotary drilling machine under the action of the arc-shaped supporting plate, the supporting rod and the connecting plate, the influence of gravity and pressure on the connecting shaft when the drill bit body of the rock impact drill hole-forming barrel drill inclines is reduced, and therefore the service life of the connecting shaft is prolonged, and the stability of the connecting shaft is improved.

According to the hydraulic ultrasonic composite fracturing coal seam pressure relief and permeability increasing method based on water pressure regulation and control, in the initial stage, a low-pressure pressure-maintaining ultrasonic excitation softening pressure relief technology is adopted, and a coal reservoir is subjected to humidifying, strong moistening, softening and pressure relief under the action of low water pressure and ultrasonic excitation; in the middle stage, based on pump pressure changes, a high-pressure pressurization hydraulic ultrasonic composite fracturing process and a low-pressure pressure maintaining ultrasonic excitation softening pressure relief process are alternately carried out in a self-adaptive mode, physical transformation is carried out on the coal reservoir structure, a pore fracture network is enriched, and fracturing and permeation increasing are carried out; and in the later stage, a low-pressure pressure-maintaining hydraulic ultrasonic circulating excitation blockage removal and permeation enhancement process is adopted, hole fracture channels in the fractured coal reservoir are dredged, bridge blockage is removed, desorption is promoted, and permeation is increased. According to the method, in different stages of ultrasonic composite hydraulic fracturing, self-adaptive water pressure regulation and control are matched, respective unique advantages of an ultrasonic excitation technology and a hydraulic fracturing technology are fully played, the hydraulic and ultrasonic composite fracturing process can be remarkably optimized, and the pressure relief and permeability increasing effects of the coal reservoir are improved.

The invention belongs to the technical field of bridge construction, and particularly relates to a deepwater bare rock shipborne punching machine underwater steel pipe pile construction method which comprises the specific steps that S1, combined shipborne impact hole guiding and cleaning integrated equipment is designed; s2, ship body displacement; s3, lowering the steel casing; s4, punching is conducted; s5, hole cleaning; s6, measuring the hole depth; s7, the steel casing is lifted; s8, inserting and driving steel pipe piles; and S9, checking and accepting. The thought that a load source, namely punching equipment, is separated from the trestle is adopted, the problem that the trestle is prone to being damaged by repeated loads in the hole guiding process is solved, the hole guiding procedure and the steel pipe pile inserting and driving procedure are changed into parallel construction from flow construction, the hole guiding operation efficiency of the steel trestle and the steel platform steel pipe pile is greatly improved, and the construction period is shortened. The construction period is shortened.

The present invention discloses a drilling mechanism for slope grouting reinforcement, which belongs to the technical field of drilling equipment. The mechanism comprises an engineering vehicle body, a drill bit assembly for drilling, and a carrier for carrying the drill bit assembly. A power structure for providing power to the drill bit assembly is slidably connected to the outer wall of the carrier. The output end of the power structure is connected to a transmission structure for extending the drilling depth. The transmission structure and the drill bit assembly are connected via a drilling structure. In the present invention, after the sliding direction of the limit frame is adjusted, the drive motor is turned on to drive the flywheel to rotate. During the rotation of the flywheel, the power rod is continuously hammered, thereby causing the power sleeve to rotate under the action of the casing, thereby driving the inner drill bit and the outer drill bit to rotate through the cooperation of the output rod and the transmission sleeve rod. In this way, not only can the drill bit assembly be continuously provided with rotational force, but also the drill bit assembly can be continuously provided with impact force, thereby increasing the drilling efficiency.

The present invention relates to the technical field of impactors for drilling, and in particular to an invented positive cycle pneumatic impactor, wherein an upper air chamber is formed between the top of the piston and the attachment part of the gas distribution pipe, and a lower air chamber is formed in the cylinder body corresponding to the lower outer side of the piston; the interior of the piston has an upper gas distribution chamber and a lower gas distribution chamber in the axial direction, the lower end of the gas distribution pipe extends into the upper gas distribution chamber of the piston, and a first air flow channel is provided on the extended pipe section, which is always connected with the upper gas distribution chamber, and the lower gas distribution chamber is always connected with the lower gas distribution chamber of the piston. The impact piston can be pushed by a gas medium to move axially back and forth relative to the gas distribution pipe to form impact work on the drill bit body; by means of the axial reciprocating movement of the impact piston, the upper gas distribution chamber can switch and connect between the lower gas distribution chamber and the upper gas chamber. The present invention not only has a simple structure, but also has a large force-bearing area of ​​the piston, a high impact terminal velocity and an impact frequency, and all components of the drilling tool are relatively "solid", and the service life is significantly increased.

The invention relates to the technical field of high-altitude drilling operation, in particular to a modular quick-connection vibroflotation guide rod and a using method thereof.The modular quick-connection vibroflotation guide rod comprises an upper guide rod and a lower guide rod, a male connector assembly is arranged at the bottom end of the upper guide rod, the modular quick-connection vibroflotation guide rod comprises a male connector body and a connecting ring rotationally arranged outside the male connector body in a sleeving mode, and a clamping piece is arranged on the connecting ring in a protruding mode. And an axial guide key groove and an L-shaped guide groove are formed in the female joint body of the lower guide rod. During insertion, the axial guide key groove limits rotation of the male joint main body, and pure axial blind insertion of an internal pipeline is guaranteed; meanwhile, the clamping piece slides in along the L-shaped guide groove, the connecting ring is forced to rotate in the radial direction and is matched with the inner and outer conical surfaces to achieve zero-clearance locking. When the pipe is pulled out, the unlocking sliding sleeve is upwards and linearly lifted, the sliding pin forces the clamping piece to be unscrewed and unlocked, and meanwhile the internal micro-channel one-way valve is triggered to introduce high-pressure fluid to wash silt. Dynamic and static separation and manual-free one-key unlocking in the inserting and pulling process are achieved, and the reliability and efficiency of ultra-deep vibroflotation construction are greatly improved.

The invention relates to the field of concrete carbonization depth measurement, and discloses an unmanned aerial vehicle for detecting the concrete carbonization depth of a high-altitude difficult-to-reach part and a detection method.The unmanned aerial vehicle for detecting the concrete carbonization depth of the high-altitude difficult-to-reach part comprises a flying device used for conveying the device to the concrete surface of a high-altitude difficult-to-reach area; the adsorption device is used for stably adsorbing the flying device on the surface of concrete and counteracting the counter-acting force of the electric percussion drill; the electric percussion drill is used for drilling holes in the concrete surface; the electric actuating device is used for pushing the electric percussion drill to perform drilling operation; and the multifunctional spraying device is used for cleaning the hole and spraying a developing agent after drilling. The device is conveyed to the concrete surface of a high-altitude difficult-to-reach area through the flying device, the flying device is stably adsorbed to the concrete surface through the adsorption device, the electric percussion drill 7 is pushed by the electric actuating device to conduct drilling operation, and a hole is cleaned and a developing agent is sprayed through the multifunctional spraying device after drilling.

The invention provides a valveless hydraulic impact mechanism for connection to a tool for processing rock or concrete or both, wherein the position for the opening of the drainage channel is arranged along the cylinder bore so as to be opened and closed by a portion of the reciprocating strike piston, the position for the opening of the connection channel leading to the first drive chamber is arranged along the cylinder bore so as to be opened and closed by a portion of the reciprocating strike piston and the position for the opening of the connection channel leading to the second drive chamber is arranged in the first or second cylinder bore so as to be opened and closed by a portion of the reciprocating accumulator piston such that, with the aid of the strike piston during its motion in the first cylinder bore and the accumulator piston in the first cylinder bore or, if present, the second cylinder bore, at least the second drive chamber acquires periodically alternating pressure for the maintenance of the reciprocating piston motion, wherein the reciprocating strike and accumulator pistons hold the second drive chamber closed for the supply or drainage of driving medium present in the second drive chamber along a distance between the opening of the drainage channel in association with a first turning point of the strike piston and the opening of the connection channel in association with a second turning point of the strike piston, wherein the motion of the strike piston along the distance between the opening of the drainage channel in association with the first turning point of the strike piston and the opening of the connection channel in association with the second turning point of the strike piston takes place during compression of the volume of the accumulator compartment, wherein the magnitude of the volume of the accumulator compartment is adapted to obtain a slow change in pressure in the second drive chamber along the distance between the channel openings and wherein the strike piston and accumulator piston are solely in fluid communication such that the strike piston and accumulator piston do not make direct contact during operation of the mechanism.

Some implementations include a system having at least one thermally insulated coiled tubing and a bottom hole assembly (BHA) connected to the at least one thermally insulated coiled tubing. The BHA includes at least one capacitor, the at least one capacitor configured to store electrical power. The BHA also includes at least one electrode electrically coupled to the at least one capacitor, the at least one electrode configured to receive the stored electrical power from the at least one capacitor and to periodically emit pulsed power discharges into a subsurface formation.

The invention relates to the technical field of mineral drilling, in particular to intelligent drilling equipment for coal mine tunneling operation, which comprises a drilling platform, a drilling mechanism, an impact mechanism, a torque increasing mechanism and a guide mechanism, the drilling mechanism is fixedly arranged at one end of the top of the drilling platform, and the impact mechanism is fixedly arranged at one end, far away from the drilling mechanism, of the top of the drilling platform; the torque increasing mechanism is fixedly arranged at the top of the drilling platform and located between the drilling mechanism and the impact mechanism. Through the arrangement of the impact mechanism and the torque increasing mechanism, impact force can be provided for the spline shaft, the drilling efficiency is improved, meanwhile, after the impact hammer is meshed with the impact seat, torque force is generated on the impact seat, the torque force is further transmitted to the spline shaft and the drilling rod through the impact seat, and therefore the drilling rod is helped to get out of trouble, and the problem that the drilling rod is locked is solved.

The invention discloses a geological exploration drilling rock core layering method, which comprises six stages of rock core acquisition, data measurement, data storage, data preprocessing, data processing and analysis, and result analysis, in the data measurement, a measurement rod piece is adopted, and a color measurement module, a moisture measurement module and a hardness measurement module are distributed on the rod piece; data storage adopts a spatial data format for storage, and corresponding coordinates are given to each measurement point according to data matrix coding; the measurement data is preprocessed to meet the requirements of post-processing and analysis of the data; according to a rock core characteristic attribute division standard, the measured data is subjected to reclassification, weight analysis, superposition calculation and re-reclassification in sequence, and finally, a gray value is adopted to represent a settlement result. The time cost and the engineering cost are saved; a rock core characteristic measurement data preprocessing structure chart, a visual data preprocessing method and a visual data preprocessing process are constructed, and rock core layering is quantitatively expressed and output.

The invention discloses a drilling mechanism for slope grouting reinforcement, and belongs to the technical field of drilling equipment, the drilling mechanism comprises an engineering vehicle body, a drill bit assembly for drilling and a bearing frame for bearing the drill bit assembly, the outer wall of the bearing frame is slidably connected with a power structure for providing power for the drill bit assembly; the output end of the power structure is connected with a transmission structure used for prolonging the drilling depth, and the transmission structure is connected with the drill bit assembly through a drilling structure. According to the drilling device, after the sliding direction of the limiting frame is adjusted, a driving motor is started to drive a flywheel to rotate, the flywheel continuously hammers a power rod in the rotating process, then a power sleeve rotates under the action of a casing pipe, and therefore an output rod and a transmission sleeve rod are matched to drive an inner drill bit and an outer drill bit to rotate; in this way, rotating force can be continuously provided for the drill bit assembly, impact force can be continuously provided for the drill bit assembly, and then the drilling efficiency is improved.

The invention discloses a shield originating well freezing reinforcement tunnel portal breaking construction method which comprises the following steps: marking and partitioning a tunnel portal body, dividing the tunnel portal body into a plurality of breaking areas for breaking so as to reduce the breaking difficulty, marking the position of a freezing pipe in each breaking area, forming a peripheral hole in the edge, forming a splitting hole around the marked position of the freezing pipe, and forming a hole in the peripheral hole; therefore, the freezing pipe is protected, the freezing pipe cannot be broken due to drilling, salt water in the freezing pipe is prevented from flowing out, and the breaking effect is improved. Furthermore, all the splitting holes in each breaking area are split synchronously, all the breaking areas can be broken one by one or broken synchronously, the breaking construction efficiency can be effectively improved, and the breaking effect is guaranteed.

The invention belongs to the technical field of ore body exploration, particularly relates to prospecting drilling equipment with a stable structure, and aims to solve the problems that during deep hole drilling, a drill bit is easy to bend when encountering a complex stratum, the deeper a drill hole is, the more serious the bending is, the drill bit cannot normally drill through an ore body according to design requirements, and the drilling efficiency is low. In order to solve the problem that a drill bit is scrapped and serious economic losses are caused due to the fact that the drill bit cannot hit the ore body due to the fact that the drill bit deviates from the direction of the ore body, a drilling platform is provided, and a drilling assembly is arranged at the top of the drilling platform. The prospecting drilling equipment with the stable structure has the advantages that the phenomenon that when deep hole drilling is carried out, a drill bit is prone to being bent when encountering a complex stratum, and therefore the deeper a drilled hole is, the more serious bending is avoided, the drill bit normally drills through an ore body according to the design requirement, and the situation that the drill bit cannot reach the ore body due to the fact that the drill bit deviates from the ore body direction is reduced; the drill bit is scrapped, and the serious economic loss is reduced.

Disclosed in the present invention are a rebound kinetic energy buffer device and a rock drill, comprising a shank adapter, a housing assembly, and an impact piston passing through the housing assembly. The rebound kinetic energy buffer device comprises: a buffer piston, sleeved on the impact piston, wherein a buffer structure is provided on the outer wall of the buffer piston, a buffer cavity for being matched with the buffer structure is formed in the inner wall of the housing assembly, the end of the buffer structure facing the shank adapter is a first buffer surface, and the end of the buffer structure away from the shank adapter is a second buffer surface; a first chamber, formed between the first buffer surface and the inner wall of the buffer cavity; a second chamber, formed between the second buffer surface and the inner wall of the buffer cavity; a third chamber, formed between the end of the buffer piston away from the shank adapter and the inner wall of the housing assembly; a first oil passage, used for enabling a low-pressure oil source to be communicated with the first chamber; a second oil passage, used for enabling a high-pressure oil source to be communicated with the second chamber; and a third oil passage, used for enabling the second chamber to be communicated with the first chamber when the buffer piston moves to a first preset stroke range.

The vibration absorption device comprises a shell and a buffer piston which are coaxially arranged, the buffer piston is sleeved with the shell, and the vibration absorption device further comprises at least two buffer cavities, an oil inlet way and a balance valve which are distributed on the periphery of the buffer piston at intervals in the axial direction; the oil inlet path is arranged on the shell and is communicated with at least one buffer cavity; the buffer cavities are communicated through the balance valves, the balance valves are used for changing the communication relation between the buffer cavities according to the pressure difference between the buffer cavities, the buffer cavities can be communicated in time, the buffer cavities needing oil supplementing are subjected to oil supplementing, sudden pressure drop of the cavities is avoided, and the phenomena of negative pressure and cavitation are avoided. Damage to parts in the rock drill is reduced, and the vibration absorption effect is improved. The second aspect provides a rock drill comprising the vibration absorption device in the first aspect, an impact piston coaxially arranged in the buffer piston in a sliding mode, a bit shank coaxially arranged on the front side of the impact piston, and a plug buffer spacer bush arranged on the impact piston in a sleeving mode and located between the buffer piston and the bit shank.

The utility model discloses a head structure of a hydraulic rock drill. The head structure comprises a machine head and a bit shank, wherein the machine head is provided with a flushing medium interface; the bit shank is coaxially arranged in the machine head and can rotate and axially move relative to the machine head; a flushing head, a bit shank copper sleeve and a machine head copper sleeve are arranged in the machine head; a containing cavity communicated with the flushing medium connector is formed between the flushing head and an inner cavity of the machine head, and a flushing cavity is formed between an inner cavity of the flushing head and the bit shank. The flushing head is provided with a plurality of liquid passing holes communicated with the containing cavity and the flushing cavity, and the bit shank is provided with a flushing channel extending towards the head of the machine head and communicated with the outside and a liquid inlet hole communicated with the flushing cavity and the flushing channel. The bit shank copper sleeve and the machine head copper sleeve are arranged in the machine head, radial deviation of the bit shank is prevented through the guiding effect of the bit shank copper sleeve and the machine head copper sleeve, the stability of the bit shank in the impact and rotation process is improved, and meanwhile the service life of the bit shank is guaranteed.