428results about "Reciprocating drilling machines" patented technology

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 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 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 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.

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 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.

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 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.

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.

The invention relates to the technical field of geological survey drilling, in particular to geological survey drilling equipment which comprises a base, a supporting frame is fixedly connected to the upper end of the base, a sliding groove is formed in the supporting frame, a drilling mechanism is arranged at one end of the supporting frame, and the drilling mechanism comprises a first drill bit. An impact mechanism is arranged at the lower end of the first drill bit, an attaching plate is fixedly connected to the surface of the first drill bit and is in a bucket shape with an upward opening, a sealing mechanism is arranged at the upper end of the first drill bit, and a supporting mechanism for pushing the attaching plate to be attached to the hole wall is arranged at the position, close to the sealing mechanism, of the upper end of the first drill bit. A pressure relief mechanism is arranged in the laminating plate; the hole wall of the drill hole is expanded and compacted through the arranged attaching plate, gas exhausted by the first exhaust hole and the second exhaust hole is reserved in the hole to further expand the hole, high-pressure gas enters the lower end from the upper end of the first drill bit to be exhausted, and flowing airflow can take away heat in the first drill bit.

The tunnel intelligent drilling robot comprises a mechanical arm and a connecting base fixedly arranged at the tail end of the mechanical arm, the connecting base is connected with an electric hammer mounting support, an electric hammer is fixedly mounted in the electric hammer mounting support, and a drill bit of the electric hammer extends out of the electric hammer mounting support in the axial direction; and an elastic buffer assembly is arranged between the connecting seat and the electric hammer mounting bracket and is used for absorbing rigid collision during drilling. The device has the beneficial effects that the service life of the device can be prolonged, the drilling precision is guaranteed, and automatic and high-precision drilling is achieved based on visual perception.

The invention relates to the technical field of rock drills, in particular to a rock drill for coal mining, which comprises a drill body, an air connecting pipe is mounted on the outer wall of the drill body, an upper air inlet valve is connected to the middle of the air connecting pipe, a lower air inlet valve is connected to the bottom end of the air connecting pipe, and a limiting cylinder is mounted at the upper end of the inner side of the drill body. A piston rod is mounted on the inner side of the limiting cylinder, and a piston disc is mounted in the middle of the piston rod; a rock drilling structure is installed on the inner side of the top of the machine body and comprises a connecting block, the connecting block is fixedly connected to the bottom end of a piston rod, and the bottom end of the connecting block is fixedly connected with a connecting rod. According to the rock drill, by arranging the supporting barrel capable of moving on the outer side of the drill bit body, when the drill bit body is clamped in the rock and cannot be retracted into the machine body, the supporting barrel can stretch out and support the outer side of the rock clamping the drill bit body, upward force is applied to the machine body to assist the drill bit body to be separated from the rock, manpower is saved, and the use experience of the device is improved.

The invention belongs to the technical field of lunar exploration equipment, and provides a step-by-step laser-assisted rock breaking drilling tool and method for a lunar-based extreme environment, the drilling tool comprises a conversion disc, a rock drilling tool and a laser head, the laser head and the rock drilling tool are integrated in the same drilling tool structure through the conversion disc, laser or mechanical rock breaking modes can be switched according to working conditions, and the laser or mechanical rock breaking modes can be switched according to the working conditions. And step-by-step rock breaking is realized. The drilling tool is suitable for extreme environments such as low gravity, vacuum, high dust and severe temperature change of the moon, has the advantages of being compact in structure, flexible in switching and high in energy utilization rate, and can be widely applied to tasks such as lunar soil stripping, lunar rock mining, underground structure detection and lunar base construction.

The invention discloses an underground coal mine heading machine and a temporary supporting device thereof. The temporary supporting device comprises a bottom plate, a supporting assembly and an overturning oil cylinder and has a folded state and an unfolded state. The supporting assembly is rotationally installed at the front end of the bottom plate, one end of the overturning oil cylinder is rotationally connected and hinged to the rear end of the bottom plate, and the other end of the overturning oil cylinder is hinged to the rear end of the supporting assembly. When the temporary supporting device is in a folded state, the supporting assembly is located over the bottom plate. In the process that the temporary supporting device is switched from the folding state to the stretching state, the supporting assembly moves upwards and forwards relative to the bottom plate. The temporary support and the tunneling machine are effectively integrated, continuous operation of tunneling and supporting is achieved, and the problems that at present, the labor intensity of workers is large, the safety of the workers is poor, and the tunneling and supporting efficiency is low are solved.

The utility model provides a shallow sludge in-situ solidification stirring device, which relates to the technical field of sludge solidification, and comprises a device main body, and a drill bit assembly is arranged at the lower end of the device main body; a stirring assembly is arranged at the movable end of the first telescopic oil cylinder and extends out of the device body from the adjusting long hole. The device body of the shallow sludge in-situ curing and stirring device is used for being connected with a loading machine, the drill bit assembly arranged at the lower end of the device body can enable the device body to move in the designated direction, and the stirring assemblies are arranged on the two sides of the device body. The stirring assembly can stir sludge in the horizontal direction more uniformly, and the stirring assembly can ascend and descend in the first direction, so that the stirring assembly can fully cover the stirred area.

An electro-crushing drill bit is to drill a wellbore, wherein the electro-crushing drill bit comprises a bit body; a ground structure coupled to the bit body; and at least one electrode coupled to a power source and the bit body, the at least one electrode positioned within the ground structure, wherein the at least one electrode comprises, a fixed plate; and a movable plate that is movable relative to the fixed plate.

An arrangement and method for heating an impact device (9) of a rock treating machine (Rtm) in low-temperature operating conditions. The arrangement comprises a warm-up mode (WM) for feeding pre-heated hydraulic fluid through a feed channel (19) to a hydraulic circuit (18) of the impact device. There are one or more hydraulic accumulators (Pa) in the hydraulic circuit. The feed channel is provided with a control element (CE) for limiting the feeding of the pre-heated hydraulic fluid during the warm-up mode. The control element limits the feeding of the pre-heated hydraulic fluid in the feed channel so that separating elements (Se) of the pressure accumulators do not move.

The present invention relates to a fluid-operated percussion drill tool (1) comprising an outer wear sleeve (2) comprising a substantially cylindrical wall (3) and having inner (4) and outer (5) surfaces. The tool also comprises a percussion bit (6) having a head portion (7) and a bit retaining portion (8) and located at a forward end (9) of the outer wear sleeve. The tool further comprises a sliding piston (10) mounted for reciprocating movement within the outer wear sleeve to strike the percussion bit. The tool also includes a drive ring (11) having a substantially cylindrical wall (12) and comprising connection means (13) adapted for connecting the drive ring to a drive means of the fluid-operated percussion drill tool. At least one flushing channel (31) provides a fluid path to the cutting face of the bit for a flushing medium. A first portion (32) of the at least one flushing channel extends longitudinally within the wall (3) of the wear sleeve, a second portion (36) of the at least one flushing channel extends longitudinally within the wall (12) of the drive ring and a third portion (40) of the at least one flushing channel extends through the head portion (7) of the percussion bit to the cutting face (43) of the bit.

The utility model discloses a convenient-to-disassemble type movable grouting drilling machine which is characterized in that the side surface of a base is fixedly connected with fixing blocks and stop blocks, the fixing blocks are provided with through holes, four fixing blocks are arranged on the same face of the base, a rotating shaft is arranged in the through holes in a penetrating mode, the side surface of the rotating shaft is rotatably connected with a rotating block, and the rotating block is located between the two fixing blocks. A connecting block is fixedly connected to the lower surface of the rotating block, a supporting column is fixedly connected to the side surface of the connecting block, fixing columns are fixedly connected to the side surfaces of the base and the supporting column, a first rotating ring and a second rotating ring are rotationally connected to the fixing columns correspondingly, and second limiting rings are arranged at the ends, away from the base, of the first rotating ring and the second rotating ring; and the second limiting ring is in threaded connection with the fixing column, and an electric telescopic rod is arranged between the first rotating ring and the second rotating ring, through the structure, the whole device can be conveniently and stably supported in the using process, and the situation that the whole device is unstable and shifts due to shaking of a moving mechanism in the using process, and consequently the device is damaged is avoided.

The high-precision hydraulic rock drill rapping rod limiting structure comprises a hydraulic cylinder body and a hydraulic cylinder rear end cover connected to the tail end of the hydraulic cylinder body, a rapping rod is arranged at the axis position in the hydraulic cylinder body, the tail end of the rapping rod is a conical surface, and the inner side of the hydraulic cylinder rear end cover is connected with a main limiting seat; a guide hole is formed in the axis position of the main limiting seat, an annular oil storage cavity is formed in the bottom in the main limiting seat, the aperture of the guide hole is matched with the outer diameter of the tail end of the rapping rod, a conical damping cavity matched with the tail of the rapping rod is formed in the bottom of the guide hole, and a miniature radial damping hole is formed in the top of a cone of the conical damping cavity. And the miniature radial damping holes are communicated with the annular oil storage cavity. According to the design, the conical buffer head is matched with the conical damping cavity, so that gradually-increased hydraulic damping force is formed, and stable speed reduction is achieved. The limiting shoulder is used for making contact with and compressing the disc spring set, nonlinear and high-rigidity buffering force is provided, stable output of impact energy is guaranteed, and noise and harmful vibration are remarkably reduced.