46results about "Ice drilling" patented technology

A rapid assembly and automatic sampling drilling tool for frozen soil layer exploration includes a fixed flow divider, a flow guide pipe, a coring pipe and a drill bit. The fixed flow divider is connected to the drill bit through the flow guide pipe and the coring pipe mounted between the fixed flow divider and the drill bit. Two ends of the flow guide pipe communicate with the fixed flow divider and a main flow channel in the drill bit respectively. Hot water in the fixed flow divider can be conveyed into the drill bit through the flow guide pipe and sprayed from a nozzle arranged on the drill bit for drilling and coring operations. An inlet of the coring pipe communicates with a coring channel in an inner cavity in the drill bit, and a core sample drilled by the drill bit is taken out through the coring pipe.

A rapid assembly and automatic sampling drilling tool for frozen soil layer exploration includes a fixed flow divider, a flow guide pipe, a coring pipe and a drill bit. The fixed flow divider is connected to the drill bit through the flow guide pipe and the coring pipe mounted between the fixed flow divider and the drill bit. Two ends of the flow guide pipe communicate with the fixed flow divider and a main flow channel in the drill bit respectively. Hot water in the fixed flow divider can be conveyed into the drill bit through the flow guide pipe and sprayed from a nozzle arranged on the drill bit for drilling and coring operations. An inlet of the coring pipe communicates with a coring channel in an inner cavity in the drill bit, and a core sample drilled by the drill bit is taken out through the coring pipe.

The invention belongs to the related technical field of ocean engineering, and discloses a horizontal ice drilling transmission mechanism based on a flexible shaft, which comprises a drill bit assembly, the flexible shaft, a sleeve joint chain, an upper end joint assembly, a lower end joint assembly and a guide pipe, the sleeve joint chain is formed by hinging a plurality of sleeve joints end to end through pin shafts and is accommodated in the guide pipe; a channel used for guiding and restraining the sleeve joint chain is arranged in the guide pipe. The flexible shaft is arranged in an inner cavity of the sleeve joint chain in a penetrating mode. The upper end of the flexible shaft is connected with an external rotation driving device through an upper end connector assembly. The upper end of the sleeve joint chain is connected with an external lifting driving device through an upper end connector assembly. The whole transmission mechanism is compact in structure and small in radial size, the space of a small-diameter vertical ice hole can be fully utilized, and large-depth drilling from the vertical direction to the horizontal direction is achieved; and a more stable and efficient drilling process can be realized, and the requirements of different ice layer hardness and drilling depth are met.

The invention discloses an ice layer aperture self-adaptive hot water reaming drilling tool, and belongs to the technical field of polar region ice layer drilling. Comprising a hot water hose tail flange piece, a flange adapter piece, a first fixing sleeve, a first center pipe, a first limiting sleeve, a first sliding block, a first spraying cavity, a first spring, a first spring supporting block, a second spring supporting block, a second center pipe, a second spring, a second spraying cavity, a second sliding block and a second limiting sleeve which cooperate with one another. The device comprises a first fixed sleeve, a second fixed sleeve, a nozzle connecting piece, a first nozzle, a second nozzle, a third nozzle, a first pulley connecting rod composite mechanism and a second pulley connecting rod composite mechanism, in the descending and ascending reaming process, the drilling tool is triggered by the drilling form to autonomously perform descending and ascending reaming operation; the technical problems that in the drilling tool reaming process after a main drilling hole of polar region hot water drilling is completed, in drilling tool reaming, drilling tool descending reaming is prone to causing uneven hole diameter, and drilling tool jamming accidents are caused by ice hole shrinkage in drilling tool ascending are solved.

The invention discloses a water quality sampling device for the freezing period of a lake in a cold and arid region, which is convenient to walk on an ice surface through the movement of a crawler-type robot chassis, and is capable of sequentially replacing tools for drilling, reaming and sampling for a main shaft assembly through a tool changing mechanical arm, so that the main shaft assembly can sequentially complete the drilling, reaming and sampling work, and the working efficiency is improved. Under the condition of the same trepanning input power, a larger hole can be conveniently formed in an ice layer through drilling and reaming in sequence, subsequent sampling work is facilitated, sample storage work can be completed through cooperation of the main shaft assembly, the connecting hook, the push-pull mechanism and the rotating disc, and the working efficiency is improved. Through cooperation of the main shaft assembly, the tool changing mechanical arm, the push-pull mechanism and the rotating disc, trepanning and sampling work can be automatically completed, a water pump and a water pipe do not need to be used, the defect that the water pump and the water pipe are prone to freezing and blocking in the freezing period is overcome, the labor intensity of detection personnel is reduced, the automation level is improved, and the safety of the detection personnel is improved.

A water-jet ice core drilling rig includes a drilling barrel and a water-jet cutter head. Drilling barrel water channels are disposed on an inner barrel wall of the drilling barrel. The water-jet cutter head includes an inner pipe and an outer pipe. The inner pipe and the drilling barrel are coaxial. The inner pipe is fixedly connected to an end of the drilling barrel. First water passages are disposed on an outer side of an end of the inner pipe. The first water passages are uniformly distributed along a circumferential direction of the inner pipe. The first water passages are in one-to-one correspondence with the drilling barrel water channels. Each of the first water passages is connected with a corresponding one of the drilling barrel water channels. The outer pipe is sleeved outside the first water passages, the outer pipe is coaxially and fixedly connected to the inner pipe.

The invention discloses a guide rail type rock drill for frozen bed rock construction, and relates to the technical field of guide rail type rock drills, the guide rail type rock drill comprises a working vehicle, a fixed guide rail, a drill rod and a first fixing sleeve, the fixed guide rail and the first fixing sleeve are installed above the working vehicle, and the drill rod is arranged in the fixed guide rail and the first fixing sleeve; the fixed guide rail is used for driving the drill rod to rotate and meanwhile stretches out and draws back in the axis direction of the drill rod. The planet wheels rotate around the axis of the drill rod and rotate around the respective axes at the same time, it is ensured that the drill rod does not deviate during drilling in the later period, positioning is accurate, slipping of the drill rod is reduced, the drill rod does not slip, positioning is accurate, the drill rods supplement each other, and the breaking drill bit can be repeatedly stretched out and drawn back under the action of the telescopic spring; and when the crushing drill bit goes deep into the drilling limit, the drill rod continues drilling, and the crushing drill bit stops rotating.

The invention relates to the technical field of steam drills, and discloses an integrated steam drill which comprises a drill rod, the drill rod comprises a drill bit, and a steam generator and a gas-liquid mixing assembly are sequentially arranged at the position, close to the drill bit, of the drill rod; the gas-liquid mixing assembly comprises a liquid storage part and a gas conveying pipeline capable of being communicated with an external high-pressure gas source, an atomizer is connected to the gas conveying pipeline, and a gas-liquid mixing cavity is formed in the atomizer. A coil pipe and a combustion mechanism are arranged in the steam generator, the inlet end of the coil pipe is communicated with the outlet end of the gas conveying pipeline, and the combustion mechanism is close to the coil pipe and can be communicated with an external gas source. The combustion mechanism heats the gas-liquid mixed medium in the coil pipe into steam by combusting gas; one end of the drill bit is connected with the steam generator, and the other end of the drill bit is provided with a nozzle communicated with the outlet end of the coil. The drill bit is directly connected with the steam generator, so that the heat loss of the steam in the conveying process can be reduced, and the working efficiency of the drill bit is ensured.

A water-jet ice core drilling rig includes a drilling barrel and a water-jet cutter head. Drilling barrel water channels are disposed on an inner barrel wall of the drilling barrel. The water-jet cutter head includes an inner pipe and an outer pipe. The inner pipe and the drilling barrel are coaxial. The inner pipe is fixedly connected to an end of the drilling barrel. First water passages are disposed on an outer side of an end of the inner pipe. The first water passages are uniformly distributed along a circumferential direction of the inner pipe. The first water passages are in one-to-one correspondence with the drilling barrel water channels. Each of the first water passages is connected with a corresponding one of the drilling barrel water channels. The outer pipe is sleeved outside the first water passages, the outer pipe is coaxially and fixedly connected to the inner pipe.

This invention discloses a thermomelting drill bit with a built-in retractable drill pipe, belonging to the field of thermomelting detection technology for subglacial lakes in polar regions. In this thermomelting drill bit, the motor rotates clockwise, and the nut and drill pipe assembly move linearly within a slot in the fixed outer tube. The drill pipe assembly can push open the sealing cap and extend from the main body of the thermomelting drill bit. The nut slides out of the slot in the fixed outer tube and enters the rotating bearing platform. The nut and screw are fixed in place by the anti-rotation part of the screw. The drill pipe assembly and nut rotate clockwise together. After completing the core sampling task, the screw and drill pipe assembly rotate counterclockwise. The nut enters the slot in the fixed outer tube under the constraint of the limit stop assembly, and the drill pipe assembly begins to retract. After the drill pipe assembly retracts, the ice core is transferred from inside the drill pipe assembly to inside the screw, and the sealing cap closes accordingly. This enables precise core sampling during thermomelting drilling and storage of the ice core within the screw.

This invention discloses a soft robot system and its working method for sampling polar ice layers, applied in the field of polar drilling technology. It includes a soft robot and an ice surface working platform. The soft robot comprises a sub-ice drilling soft body and an ice surface sealing soft body. The sub-ice drilling soft body includes a soft body main unit and a heat-fusion module located at the front end of the soft body main unit. The ice surface sealing soft body includes a soft body main unit. Both soft body main unit one and soft body main unit two are provided with hollow channels, and several air chambers are provided inside soft body main unit one on both sides of the hollow channels. The ice surface working platform includes a pneumatic system, a pipeline system, a water storage system, and a main controller. The main controller is electrically connected to the pneumatic system, the pneumatic system pipelines are connected to the pipeline system, and the pipeline system pipelines are connected to the water storage system and the air chambers. The pipeline system passes through the hollow channels and connects soft body main unit one and soft body main unit two in series. This invention meets the existing requirements of unmanned drilling, flexible selection of sampling locations, no complex mechanical structure, and low propulsion resistance in ultra-deep drilling.

The invention discloses a shear type supporting eccentric wedge for ice layer directional drilling, which comprises a guide mechanism, a driving motor, a supporting mechanism and a control mechanism, the driving motor is assembled at the bottom of the guide mechanism, the supporting mechanism is connected to the lower part of the driving motor, and the control mechanism is assembled in the guide mechanism. The control mechanism is connected with the driving motor and the supporting mechanism and controls the driving motor to drive the supporting mechanism to work. The eccentric wedge has the obvious advantages that the supporting force is strong, and the eccentric wedge is thoroughly prevented from being frozen in the hole. The supporting part can avoid the situation that the coring drilling tool moves downwards and deviates from the coring position due to unstable supporting when deflecting through the eccentric wedge, and an ice core at the designated depth cannot be obtained. A heating wire is arranged in the supporting arm, and the eccentric wedge can be prevented from being frozen in the hole and cannot be lifted out. The repeated coring precision is effectively improved, and in-hole accidents are avoided.

The invention provides an automatic drilling platform for highway bridge construction, which comprises a frame, wheels are arranged on the side edge of one side of the frame, steering mechanisms are arranged in the wheels, driving motors are arranged in the wheels, a drilling bracket is arranged above one side of the frame, a drilling rod is rotatably mounted below the drilling bracket, and the driving motors are fixedly mounted above the drilling bracket. A transmission is arranged in the middle of the drilling support, two sets of change wheels and a belt are arranged in the transmission, one set of change wheels is coaxially connected with an output shaft of the driving motor, the other set of change wheels is coaxially and fixedly connected with the drilling rod, and an electromagnetic clutch is additionally arranged in the transmission. Drill rod deflection compensation and transmission dynamic adjustment and optimization are achieved through the edge calculation module, sensing-decision-execution closed-loop control is formed in combination with multi-mode driving management, an electric sliding rail balance weight system is linked with a four-stage leveling program, and traditional static balance weight limitation is broken through; the quick-release guider integrates piezoelectric ceramic fine tuning and RFID identification technologies.

This invention discloses a thermal fusion drilling tool suitable for ice layers containing impurities, belonging to the field of ice layer thermal fusion detection technology. It includes a thermal fusion drill bit, a front-end crawling mechanism, a scientific detection chamber, a deflection mechanism, a rear-end crawling mechanism, and an end-effector. The front-end crawling mechanism drives the thermal fusion drill bit to rotate, preventing impurity particles from accumulating at the bottom of the hole and improving drilling efficiency. One end of the scientific detection chamber is connected to the front-end crawling mechanism, and the other end is connected to the deflection mechanism. It houses corresponding scientific detection devices for sampling and data acquisition. The deflection mechanism is used for the swaying between the various mechanisms of the thermal fusion drill bit. The rear-end crawling mechanism allows the drill bit to crawl on large rocks and ice surfaces, increasing the spatial freedom of the drill bit. This invention enables both thermal fusion drilling and rotary drilling. The deflection mechanism and the rear-end crawling mechanism work together to allow the thermal fusion drill bit to drill under various geological conditions, improving the drill bit's flexibility and reliability, and achieving the goal of deep-depth exploration.

The polar ice hole side wall coring universal robot belongs to the field of drilling tools, including a drill tool outer tube, a drill tool guide tube, a coring tool and an azimuth locator. The coring tool can extend or retract into the drill tool guide tube. The coring tool includes a hot melt drill bit, an ice core breaker and a hose. A drilling pressure sensor is arranged between the hot melt drill bit and the ice core breaker. The hose can be bent arbitrarily and has multiple mechanical sections connected at equal intervals along its length direction. A displacement sensor is arranged on the outer wall of the mechanical section. The mechanical section includes a fixed ring and a mechanical arm evenly arranged at equal intervals along the circumference of the fixed ring. A hole wall pressure sensor is arranged between the fixed ring and the mechanical arm. The azimuth locator is configured to determine the azimuth displacement of the outer tube relative to the ice hole. An azimuth sensor is arranged on the azimuth locator. The present invention can change the azimuth of drilling. After the hot melt drill bit drills into the side wall of the ice hole, the elevation and azimuth of the coring tool can be changed to achieve sampling of layers in all directions.

The invention discloses a water jet ice core drilling rig, which belongs to the technical field of ice core collection. The water jet ice core drilling rig comprises a drill barrel and a water jet head, wherein a cut-off block for cutting off the ice core is arranged on the inner side of one end of the drill barrel, and the water jet head comprises an inner tube and an outer tube, wherein the inner tube is coaxially fixedly connected to the drill barrel and located at one end of the drill barrel where the cut-off block is located, wherein a plurality of first water channel openings are arranged on the outer side of one end of the inner tube close to the drill barrel, wherein each first water channel opening is evenly arranged along the circumference of the inner tube, and the first water channel opening is connected to the corresponding drill barrel water channel, and the outer tube is sleeved outside the first water channel opening and coaxially fixedly connected to the inner tube. The water jet ice core drilling rig of the invention is suitable for ice core drilling work in any glacial environment, and the verticality of the borehole is high, and the drill is not easily stuck, thereby solving the problem that the existing screw-in ice core drilling rig is prone to damage of the cutter head and motor stuck and burned in an environment with high moraine content.

The application relates to the technical field of glacier drilling, in particular to a portable glacier drilling electric drill, which comprises an electric drill, the front surface of the electric drill is provided with a drill bit, the outer surface of the electric drill is provided with a mounting plate, the side surface of the mounting plate is connected with a clamping plate, an adjusting hole is arranged in one side of the mounting plate, an adjusting bolt is arranged in the adjusting hole, a locking bolt is threadedly connected with the position close to the front surface of one side of the mounting plate, a connecting plate is fixedly connected to the top of the mounting plate, and the side surface of the connecting plate is fixedly connected with a handle. The portable glacier drilling electric drill can adjust the distance between the two mounting plates, make one of the mounting plates align with the adjusting hole, connect the mounting plate with the clamping plate through the adjusting bolt and the locking bolt, and fix the electric drill. The handle can conveniently carry and control the electric drill during use, and the electric drill can be adjusted according to the model, so that the applicability is high.

The invention discloses a large-depth ice layer hot water drilling tool accurate speed regulation lifting system and a using method thereof, and belongs to the technical field of hot water drills. The system comprises a drilling winch, a drilling hose, a hose driving device, a drill tower and an inner ring cooperative control unit; the drilling winch is used for storing a large-length drilling hose and is matched with the hose driving device to take up and pay off the drilling hose; the drilling hose is used for providing hot water, electric power and communication for the hot water drilling tool; and the hose driving device is used for lifting the drilling hose and the hot water drilling tool in the drill hole. And the inner ring cooperative control unit ensures a cooperative work function. According to the method, under cooperation of all parts of the system, the hose driving device actively controls the lifting speed of the hot water drilling tool, the drilling winch works cooperatively in a constant torque mode, the tension of the drilling hose is maintained, drilling or lifting operation is carried out, orderly winding and unwinding of the large-length drilling hose are achieved, and stable control over lifting operation of the hot water drilling tool is achieved. And the drilling speed control precision, the cooperative work performance and the self-adaptive adjusting capacity are good.

The present invention relates to a receiver hitch-mounted ice drill device for ice fishing. The device allows a user to move an ice drill while attached to a vehicle while the drill remains outside of the vehicle. In addition, the device allows a user to remotely operate an ice drill of the device from within a vehicle.

The invention belongs to the technical field of glacier advancing, particularly discloses a robot mountain glacier walking method, a mountain glacier robot and a climbing device of the robot, and aims to solve the problem that an existing glacier robot is difficult to climb on a mountain glacier. According to the mountain glacier walking method of the machine, a first drill rod downwards drills into an ice layer and reaches a first depth, so that the machine can reach enough road holding force; the whole machine is driven by taking the first drill rod as a shaft to rotate around the first drill rod to a preset position, so that initial displacement can be realized; the second drill rod downwards drills into the ice layer and reaches a second depth, then the first drill rod is controlled to retreat from the ice layer, the second drill rod serves as a shaft to drive the whole machine to rotate around the second drill rod to a preset position, and then the machine can advance on the mountain glacier; due to the fact that the drill rod is adopted to drill into the specific position in the ice layer to provide the road holding force, the influence of the slope of the mountain glacier is small, walking and climbing on the mountain glacier are facilitated, and stability and reliability are achieved.

This invention relates to the field of steam drilling technology and discloses an integrated steam drill, including a drill rod, a drill bit, and a steam generator and a gas-liquid mixing assembly arranged sequentially near the drill bit. The gas-liquid mixing assembly includes a liquid storage container and a gas supply pipe that can be connected to an external high-pressure gas source. An atomizer is connected to the gas supply pipe, and the atomizer has a gas-liquid mixing chamber. The steam generator has a coil and a combustion mechanism. The inlet end of the coil is connected to the outlet end of the gas supply pipe, and the combustion mechanism is located near the coil and can be connected to an external gas source. The combustion mechanism heats the gas-liquid mixture in the coil into steam by burning gas. One end of the drill bit is connected to the steam generator, and the other end has a nozzle that is connected to the outlet end of the coil. By directly connecting the drill bit to the steam generator, heat loss during steam transportation can be reduced, thereby ensuring the working efficiency of the drill bit.

The underwater icebreaking device comprises a base, a positioning assembly and an ice drilling assembly, the positioning assembly comprises a positioning driving part and a plurality of positioning cones, the positioning cones are arranged on the base in a sliding mode and have the first state that the positioning cones retract into the base and the second state that the positioning cones protrude relative to the base, and the ice drilling assembly is arranged on the base. The positioning driving piece is in transmission connection with the multiple positioning cones so as to drive the positioning cones to be switched between the first state and the second state. The ice drilling assembly comprises an ice drilling driving part and a drilling machine, the drilling machine is arranged on the base in a sliding mode and provided with a drill bit capable of drilling holes in the floating ice, and the ice drilling driving part is in transmission connection with the drilling machine so that the drill bit can be close to or away from the floating ice. Due to the fact that all the positioning cones puncture the floating ice, reverse torque generated in the ice drilling process can be transmitted to the floating ice through all the positioning cones, the reverse torque generated in the ice drilling process is borne by the floating ice instead of the underwater vehicle, and the stability of the underwater vehicle in the ice drilling process is improved.

The invention belongs to the technical field of on-ice operation tools, and discloses an ice surface punching device which comprises a vehicle body. The limiting assembly comprises a plurality of driving pieces and a plurality of limiting pieces, the limiting pieces are arranged on the vehicle body and penetrate through the vehicle body to extend into the ice surface, and the driving pieces are arranged on the limiting pieces and used for controlling the limiting pieces to be connected with the ice surface in a limiting mode; the drilling assembly comprises a positioning cover and a drilling part, the positioning cover is installed on the vehicle body through an adjusting part, the positioning cover is in limiting connection with the ice surface through an adsorption part, and the drilling part is arranged in the positioning cover and used for drilling the ice surface; and the collecting assembly comprises a collecting piece and a collecting box, the collecting box is fixedly connected to the positioning cover, the collecting piece is arranged in the positioning cover and communicates with the collecting box, and the collecting piece is used for collecting ice residues generated during punching operation. The technical problems that in the prior art, ice surface drilling labor intensity is high, positioning is not stable, and ice slag is inconvenient to clean are solved.

The invention discloses a peristaltic hot melting drilling tool and method suitable for an ice layer of an extraterrestrial celestial body, and belongs to the technical field of ice layer hot melting detection.The drilling tool comprises a hot melting drill bit device, a telescopic device, a deflection device, an anchoring device and a side wall heating pipe, and the hot melting drill bit device is used for executing hot melting drilling; the telescopic device is used for driving the hot melting drill bit device to stretch out and retract in the axial direction and providing bit pressure. The telescopic device is sleeved with the side wall heating pipe, and the deflection device is used for driving a whole formed by the hot melting drill bit device, the telescopic device and the side wall heating pipe to deflect. The anchoring device is connected to the end, away from the telescopic device, of the deflection device and used for providing anchoring force in the drilling process. According to the method, the anchoring device and the telescopic device are matched with each other, and peristaltic drilling of the drilling tool is achieved by circularly executing the actions of anchoring, stretching drilling, anchoring releasing and retracting. The technical problem that in the prior art, in the drilling process of an ice layer of an extraterrestrial celestial body, efficiency is low, and even drilling cannot be conducted is solved.

The invention discloses a high-altitude frozen soil sample collection device, and relates to the technical field of frozen soil sample collection, the high-altitude frozen soil sample collection device comprises a support rod, a support base fixedly connected to one end of the support rod, and a motor fixedly connected to the other end of the support rod; the drilling and digging sampling structure comprises a rotating shaft with one end fixedly connected to the motor, an outer drilling barrel fixedly connected to the rotating shaft, an outer drilling cone fixedly connected to the outer drilling barrel and a drilling assembly fixedly connected to the surface of the outer drilling cone. The spiral saws with different sizes are arranged in the drilling and digging structure, so that soil particles with different characteristics in frozen soil can be effectively treated, drilling resistance change caused by particle cohesiveness difference is avoided, and the continuity of a collection process and the integrity of a sample are ensured.

The invention belongs to the technical field of polar region ice layer drilling, hot water drilling serves as an ice layer drilling method with the highest drilling speed at present and has become an important technical means for ice layer and under-ice environment detection, however, only part of heat energy of high-temperature jet flow is transmitted to an ice layer for drilling and broaching, heat loss exists, and drilling efficiency is high. The invention provides a multi-parameter adjustable injection type ice layer hot water drill bit based on modular design, which is characterized in that a reducing nozzle, a drill bit main body and a mixing pipe are located at coaxial positions, and different combination modes of the reducing nozzle and the mixing pipe which are selectable in multiple specifications support dynamic combination of key parameters such as a throat nozzle distance, an area ratio and a mixing pipe contraction angle; by introducing the jet pump structure, recycling and heat exchange strengthening of low-temperature hot water heat energy are achieved, the heat energy utilization rate of the low-temperature hot water is remarkably increased, full-static structural design is adopted, no moving part exists, and the continuous drilling machine has the advantages of being high in structural reliability, low in maintenance cost and the like and is suitable for continuous drilling operation in the fields of polar region ice layer exploration and glacier research.

The present invention relates to a novel kind of machine for handling snow and ice, comprising a rotation shaft (4) and screw thread (5) surrounding the rotation shaft (4) at least partly as well as a transmission coupling (6) for rotating the rotation shaft (4) and screw thread (5). The rotation shaft (4) and the screw thread (5) are surrounded by an outer tube (1) and the assembly usually includes an ice blade (7), a snow blade (8) and a connection means fitted at the end of the centre shaft for interchangeable attachment of the ice blade (7) and snow blade (8).

This invention discloses a plasma ice layer drill bit, relating to the field of drilling equipment technology. It includes a housing and a drilling mechanism, with the drilling mechanism located at the bottom of the housing. The drilling mechanism comprises a drill bit housing, a drive mechanism, an electrode disk, a water spraying mechanism, and a water suction mechanism. The drive mechanism is installed at the top inside the drill bit housing, and its telescopic rod is connected to the electrode disk. The electrode disk has a first row and a second row of cylindrical protrusions arranged in a ring on its surface. The drill bit housing has corresponding guide holes, with arc guide grooves between the guide holes. The water spraying mechanism is located between the first and second rows of cylindrical protrusions. A high-voltage electrode is located at the top of the first row of cylindrical protrusions, and a grounding electrode is located at the top of the second row of cylindrical protrusions. The water suction mechanism is located within the drill bit housing. This invention effectively prevents the electrodes of the plasma drill bit from colliding with the ice layer during drilling or insertion, thus improving the electrode's service life.

The present application belongs to the technical field of ice layer hot water drilling, and particularly relates to a reheated ejection type nozzle drill bit for ice layer hot water drilling and a drilling method. The structure of the reheated ejection type nozzle drill bit comprises a main flow interface, an absorption chamber, an ejection pipe and a mixing chamber, wherein the absorption chamber is provided with a plurality of tapered nozzles. High-temperature hot water of the main flow forms a high-speed low-pressure area after passing through the tapered nozzles under the action of external pump work, and low-temperature hot water of the secondary flow is sucked into the absorption chamber through the ejection pipe, and the two are mixed in the mixing chamber and ejected to impact the ice surface to melt the ice. The present application utilizes the ejection effect of the reheated ejection type nozzle to reheat and utilize the waste heat of the low-temperature hot water at the bottom of the drill hole, and at the same time, the convection heat exchange at the hole bottom is strengthened, so that the heat utilization rate of the hot water drilling system can be significantly improved. Meanwhile, the nozzle drill bit is free of mechanical transmission devices inside, and has the advantages of simple structure and reliable work.

The invention discloses an ultrasonic enhanced hot melting drilling tool for ice layer drilling and an ice melting method thereof, and belongs to the technical field of ice layer drilling. The ultrasonic enhanced hot melting drilling tool comprises a piezoelectric driving module and a hot melting module; the piezoelectric driving module is used for generating and transmitting axial ultrasonic vibration; the hot melting module is used for heating and melting the ice layer; the vibration output end of the piezoelectric driving module is connected with a drill bit base body of the hot melting module, so that ultrasonic vibration can be transmitted to the front end of the drill bit base body and cooperates with heat generated by the hot melting module to accelerate ice layer melting and refreezing of melt water. According to the ice melting method, based on the ultrasonic enhanced hot melting drill, the cavitation effect generated in a water melting film by ultrasonic vibration, the destructive effect on an ice crystal structure, the disturbance effect on a water body and the cooperative heating effect are utilized, ice layer melting is accelerated, and the ultrasonic enhanced hot melting drill is propelled. Compared with the prior art, higher drilling speed, lower energy consumption and a more stable melting interface can be realized.