1062results about "Earth drilling tools" patented technology

The invention provides a reverse-circulation large-diameter binding type down-hole hammer reamer bit and a slag discharging method. The reverse-circulation large-diameter binding type down-hole hammer reamer bit specifically comprises a drill bit shroud, an air distribution chamber, a central pipe combination, a down-hole sub hammer and a slag suction opening, wherein the slag suction opening is formed in the bottom of a central pipe and used for sucking crushed rock slag into a drill rod through negative pressure so as to discharge the rock slag. For bedrock large-diameter water-containing stratum reaming drilling, the unique slag suction opening is formed in the bottom of the center pipe, tail gas of the down-the-hole hammer forms entrainment airflow to push liquid in a drill hole to return to the ground surface from the slag suction opening, and the stable continuous reverse circulation slag discharging effect is achieved by means of gas lift water level rising of tail gas pressure of the down-the-hole hammer; and the drilling efficiency of the large-diameter binding type down-the-hole hammer is improved, and the stable and continuous deslagging effect is extremely good in construction application.

The invention belongs to the technical field of rock drills, and discloses a rotary impact type hydraulic rock drill. The rock drilling bit group is arranged in one side of the rock drilling machine shell; the rotating mechanism is arranged at the top of the rock drill shell, and the rotating mechanism is located above one side of the rock drill bit set; according to the technical scheme, by arranging the hydraulic mechanism, the cooling and cleaning assembly and the driving assembly, when the hydraulic mechanism is started to make the output end collide with one end of the middle of the rock drilling bit set back and forth, the top of one side of the driving assembly is driven to move up and down back and forth; cold water in one side of the cooling and cleaning assembly can be pumped back and forth into the other side of the cooling and cleaning assembly, and then the cold water can be sprayed out through the other side, so that heat generated by the impact part of the hydraulic mechanism and the rock drilling bit group can be cleaned and cooled; the service life of parts in the rock drill shell is prevented from being influenced by high temperature.

Disclosed are small model pit launch horizontal direction drills suitable for drilling a substantially horizontal bore hole and laying pipe underground from within a surface dug pit. The devices comprise a stationary frame and a carriage component competent to move forward and back along the frame and drill and retrieve an attached drill stem through an aperture in the frame. The carriage components are configured to allow an operator to straddle the carriage and operate the device from a seated position within the frame component interior.

The invention discloses a half coal rock digging and anchoring all-in-one machine, and relates to the technical field of mining devices, the half coal rock digging and anchoring all-in-one machine comprises a pair of rear drill arm parts arranged on a machine body part, and each rear drill arm part comprises a swing oil cylinder III and a rear onboard jumbolter; a recoil force grading detection mechanism is arranged between the swing oil cylinder III and the rear onboard jumbolter; the recoil force grading detection mechanism comprises a recoil force sensor, a first microswitch, a buffer mechanism and a connecting mechanism. By arranging the recoil force grading detection mechanism, recoil force is transmitted to the mounting plate during working, the mounting plate drives the swing oil cylinder plate to act through the connecting mechanism, the connecting plate of the buffer mechanism triggers a first microswitch firstly and then abuts against a recoil force sensor, and grading detection of the recoil force is achieved; the mechanism solves the problem that the angle deflection of the rear onboard jumbolter is caused by the recoil force but is lack of effective grading detection, avoids the risk of compensation failure caused by the fault of a single detection element, and improves the detection reliability of the recoil force.

The trestle comprises a main bridge, a moving seat and a rock drilling mechanism, the main bridge and the moving seat can move longitudinally, the rock drilling mechanism can swing transversely, the main bridge is provided with a passing part allowing vehicles to pass and a longitudinal moving rail allowing the moving seat to move, the longitudinal moving rail is arranged below or on the side face of the passing part, and the rock drilling mechanism is connected with the moving seat. The excavation method comprises the steps that S1, the main bridge walks in place; s2, the front approach bridge moves forwards to be in lap joint with a to-be-excavated step, a protective cover moves to an avoiding position, a moving seat drives a rock drilling mechanism to move forwards, and the rock drilling mechanism conducts shot hole rock drilling on the to-be-excavated inverted arch end face; s3, the rock drilling mechanism and the front approach bridge retreat to the safety area, and the protective cover moves to the front of the rock drilling mechanism; s4, charging and blasting in each shot hole of the inverted arch, and removing slag; and S5, the steps S2 to S4 are executed repeatedly till the whole construction interval of the inverted arch is excavated. The device has the advantages that the structure is reliable, rock drilling and vehicle passing deslagging can be considered, and the construction progress can be improved.

The invention discloses a reamer electromechanical driving mechanism and method capable of detecting the position state of a blade, and relates to the technical field of tools of petroleum drilling engineering, the reamer electromechanical driving mechanism comprises a power assembly, a lead screw assembly, an ejector rod, a locking assembly, a rotation detector and a displacement detector which are mounted in a drill collar; the power assembly is connected with the lead screw assembly, the lead screw assembly is connected with the ejector rod, the ejector rod is connected with the reamer blade, the power assembly rotates and drives the ejector rod to move up and down through the lead screw assembly, and the ejector rod moves up and down to drive the reamer blade to be unfolded or folded. The locking assembly is assembled on the ejector rod, and after the reamer blade is unfolded in place, mechanical self-locking is conducted on the ejector rod. The rotation detector is assembled beside the lead screw assembly to detect rotation of the lead screw assembly, and the displacement detector is assembled beside the ejector rod to detect up-and-down movement of the ejector rod. The opening and closing state of the cutter wing is measured and uploaded through the rotating detector and the displacement detector, the cutter wing is expanded in place, the underground condition can be judged easily, and controllable multiple reaming is achieved.

The invention relates to the technical field of pre-splitting hole drilling, in particular to a pre-splitting hole angle control device. According to the pre-splitting hole angle control device, the drilling angle and position can be locked during drilling, and the situation that vibration affects the drilling precision is avoided. A pre-splitting hole angle control device comprises a vehicle body, an adjusting frame, a first butt joint frame and the like, the upper side of the right portion of the vehicle body is rotationally connected with the adjusting frame, and the upper side of the adjusting frame is connected with the first butt joint frame. The motor is started to drive the bidirectional lead screw to rotate, so that the limiting frames get close to each other, the first clamping frames are clamped and matched with the limiting frames under the acting force of the torsional springs, the first clamping frames are prevented from moving rightwards, the first clamping frames are locked in a one-way mode, and then the movable frame, the first connecting rod and the adjusting frame are locked; the effects that the air cylinder can be prevented from being damaged when the drilling machine vibrates, and the drilling precision is prevented from being affected are achieved.

The utility model relates to the field of drilling tools for wells, in particular to a self-adaptive rotary steering drilling tool which comprises a drill bit body and a damping column, a plurality of blades are sequentially arranged on the crown portion of the drill bit body in the circumferential direction, the cutting faces of the blades are fixedly connected with a plurality of cutting teeth, and mounting holes are formed in the outer side faces of the blades. Steel sleeves are fixedly arranged in the mounting holes, the damping columns are movably inserted in the steel sleeves, the ends, located in the steel sleeves, of the damping columns are fixedly connected with connecting bases, adjusting plates are arranged between the connecting bases and the bottoms of the steel sleeves, and outer-layer low-rigidity spiral springs are connected between the adjusting plates and the connecting bases. An inner layer high-rigidity conical spring is arranged on the inner side of the outer layer low-rigidity spiral spring, and an adjusting assembly for adjusting the adjusting plate and the bottom of the steel sleeve is arranged on the steel sleeve. The drill bit can better adapt to different pressure requirements, and the drill bit is prevented from bearing overlarge impact force, so that the cutting teeth are protected, and the service life of the drill bit is prolonged.

Some implementations include a method which comprises determining a drilling efficiency of a drill bit at a first depth in a wellbore formed in a subsurface formation based, at least in part, on a bit wear level of the drill bit, determining a cutting force mechanical specific energy of the drill bit at the first depth, and determining a rock strength of the subsurface formation at the first depth based on the drilling efficiency and the cutting force mechanical specific energy of the drill bit.

A method including receiving a three-dimensional scan of a coating that coats an object. The coating and the object, in combination, have a shape. The method also includes flattening the three-dimensional scan to generate flattened data. Flattening includes conforming scan data in the three-dimensional scan to zone data for zones of a layout. The zones represents sections of the shape cut along boundaries in the shape. Each of the zones represents a corresponding thickness of the coating in a corresponding section of the sections. The method also includes vectorizing the flattened data into a vector data structure. The method also includes generating a prediction whether one or more zones of the zones are out of an engineering tolerance for the coating. Generating the prediction is performed by a machine learning model that takes, as input, the vector data structure and produces, as output, the prediction.

A drilling system is provided that includes a wellbore device. The wellbore device includes a housing including a bore and a seal element composed of an elastomeric material. positioned within the housing, and configured to seal the bore. The wellbore device includes a bearing assembly supported within the housing and configured to enable the seal element to rotate relative to the housing. The drilling system includes a wireless seal wear monitoring system that includes an RFID tag embedded within the seal element and an RFID transceiver and an RFID antenna disposed within a recess of the housing at an axial location adjacent the RFID tag. The RFID transceiver and RFID antenna are configured to communicate with the RFID tag and a control system. The control system is configured to determine a presence of wear in the seal element based on information provided by the RFID tag.

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 discloses a positioning assembly and an energy-saving drilling device for mine blasting construction, and belongs to the technical field of mine blasting drilling equipment. A threaded rod positioning mechanism capable of synchronously rotating is integrated through a movable base, a drill rod drives a magnetic coupler through a synchronous belt when rotating, a plurality of threaded rods are driven to be synchronously screwed into a rock mass to form stable supporting, and the problem of hole position deviation caused by device displacement in the drilling process is effectively solved. A clamping groove type quick release structure is arranged at the bottom of the drill rod, a sliding rod is driven by cooling water pressure to push a trapezoidal clamping plate to contract, a drill bit automatically falls off, and a matched annular supporting arm achieves accurate bearing and replacement of the drill bit through magnetic attraction positioning. The cooling system adopts the design that double flow channels are arranged in the drill rod, and the drill bit is directly cooled through the liquid drainage inclined hole during drilling. According to the device, the drilling positioning precision and the drill bit replacement efficiency are remarkably improved, and water resources are recycled.

The invention belongs to the technical field of rock mechanics test equipment, and discloses a drilling device based on a deep engineering true triaxial while-drilling simulation test, the drilling device comprises while-drilling trolley equipment, the while-drilling trolley equipment is composed of a mobile vehicle body, a driving mechanism and a drilling mechanism, the drilling mechanism comprises a drill rod main body and a drill bit main body, according to the invention, through the cooperation of structures such as a scraping assembly and a flushing assembly, rock debris accumulated at the joint of the drill bit main body and the drill rod main body can be conveniently cleaned, and large-particle rock debris is scraped and cleaned through the scraping assembly, is loosened and is pushed to the periphery, so that the rock debris can be carried and discharged by circulating drilling fluid; meanwhile, the flushing assembly pressurizes the drilling fluid without rock debris, so that the drilling fluid washes the scraping plate and the drill bit body, attached small-particle rock debris is cleaned, the situation that the scraping plate is clamped by the small-particle rock debris is avoided, the situation of rock debris accumulation is avoided, and the accuracy of data during testing is guaranteed.

The invention provides a rotary drilling rig for building pile foundation hole forming, and relates to the technical field of rotary drilling rigs, the rotary drilling rig comprises a movable workbench and a rotary drilling barrel, a drill rod is fixedly mounted at the top of the rotary drilling barrel, a drill rod driver for driving the drill rod to rotate is arranged on the movable workbench, and an annular groove is formed in the inner wall of the rotary drilling barrel; three cavities are formed in the rotary excavating drill cylinder, the rotary excavating assembly is installed in the cavity in the lowermost layer of the rotary excavating drill cylinder, the reaming assembly is installed in the cavity in the uppermost layer of the rotary excavating drill cylinder, and the two driving assemblies are installed in the cavity in the middle layer of the rotary excavating drill cylinder and used for adjusting the rotary excavating assembly and the reaming assembly. By means of the technical scheme, when rotary excavating is conducted according to different geology or different reaming requirements, underground rotary head replacement is achieved by adjusting the rotary excavating assembly and the reaming assembly, the working efficiency is improved, and the rotary excavating efficiency is improved. And the rotary excavating stability is ensured through locking of the locking assembly.

A method of monitoring the wear of a drill bit of a drilling system is provided. The method includes drilling into a formation using the drill bit of the drilling system, obtaining a weight-on-bit (“WOB”) from sensors of the drilling system, and obtaining a torque-on-bit (“TOB”) from the sensors of the drilling system. A bit damage indicator (“BDI”) is determined that is correlated with the wear of the drill bit based on a relationship between the WOB and the TOB.

The invention provides a reverse circulation drilling device with a reaming function and a using method thereof.The reverse circulation drilling device comprises a drill rod, the drill rod is hollow to form a main pipeline, the bottom of the drill rod is sleeved with a composite drill bit, and the composite drill bit comprises at least one down-the-hole hammer and at least one oil pressure hammer; one part of the down-the-hole hammer extends out of the bottom surface of the shell of the composite drill bit; the oil pressure hammer is arranged in the circumferential direction of the shell of the composite drill bit and can stretch out or retract in the radial direction of the shell of the composite drill bit. The reverse circulation drilling device comprises the composite drill bit, the composite drill bit is provided with the oil pressure hammer and the down-the-hole hammer, the oil pressure hammer can be used for reaming, the down-the-hole hammer can be used for drilling, the oil pressure hammer can be withdrawn when not working, follow-up drilling is not affected, and the composite drill bit can achieve reaming and vertical drilling at the same time; in actual construction, time for replacing the drill bit can be saved, construction efficiency is improved, and time and cost are greatly saved.

The application discloses a through-layer drilling ring flow supply self-cleaning and blocking integrated hole bottom extraction non-jetting drill tool, which comprises a multifunctional rod body, an extraction inner group pipe, a radial cavity forming nozzle, an axial blocking nozzle, a conical hole screen plate strip, an air inlet transition piece, a cross-border air inlet pipe, a compression spring slide valve assembly and a ring flow opening and closing drill bit. The special slide valve control mechanism is adopted, the original radial cavity forming jet flow is reserved, and the instantaneous axial blocking jet flow is added, so that the conical hole screen plate strip is self-cleaned and blocked. The cross-border air inlet pipe and the transition air inlet piece are combined and sealed, so that the radial air inlet channel passes through the axial flow supply channel without air and water leakage. The ring flow supply anti-backflow opening and closing drill bit is designed, and the jet flow water medium pollution problem and the drill bit opening and closing problem are solved.

The invention relates to the technical field of bridge pile foundation construction, in particular to a bridge pile foundation construction vibration buffering device which comprises a support. The top end of the support is fixedly connected with a motor, the output end of the motor is fixedly connected with a lead screw, the lead screw is rotationally connected with the support, guide rods are arranged on the two sides of the lead screw and fixedly connected with the support, the outer side of the lead screw is in threaded connection with a lifting plate, and the two sides of the lifting plate are movably connected with the two guide rods in a sleeved mode respectively. Driving equipment is connected to the upper end of the lifting plate through a supporting assembly, a drill rod is fixedly connected to the bottom end of the driving equipment and penetrates through the supporting assembly and the lifting plate, and a clamping assembly is arranged on the outer side of the drill rod; the supporting assembly comprises a honeycomb plate, the honeycomb plate is composed of a plurality of honeycomb units, and the supporting assembly has the beneficial effects that by arranging multiple damping and buffering structures, it is prevented that driving equipment generates strong vibration in the running process, and consequently the driving equipment and a drill rod are greatly influenced, the stability of the drill rod in the drilling process is guaranteed, and therefore the construction quality is guaranteed.

The utility model belongs to the technical field of drill rods, and particularly relates to a multifunctional drill rod connecting device of a coal mine drilling machine, which comprises a fixing plate, a pair of connecting rods are fixedly connected to the middle of the side wall of the fixing plate and are symmetrically arranged on two sides of the fixing plate, and a water outlet component is arranged on the side wall of the bottom of the fixing plate. By arranging the fixing base, the rotating buckle plate, the fixed buckle plate, the spring and the groove hole, connection between the first drill rod and the second drill rod can be tighter and more stable, the rotating buckle plate and the fixed buckle plate are connected together in a mutual buckling mode, the situation that the first drill rod and the second drill rod fall off or loosen in the drilling operation process is reduced, and the drilling efficiency is improved. The coal mine drilling machine can be kept in a stable working state under various environmental conditions, due to the buckling effect between the rotating buckling plate and the fixed buckling plate, the anti-seismic performance of the coal mine drilling machine is enhanced, even under the action of external force, the drill bit can stably conduct drilling operation, and the drilling efficiency is improved.

The application provides a novel reaming drill bit device and a reaming method thereof, which comprises a reaming drill bit and a drill rod connector, the reaming drill bit comprises a drill bit base, a hollow bolt, a limiting block, a spring, a sliding rod and a cutter, one end of the drill rod connector is connected with a drill rod, and the other end of the drill rod connector is connected with the drill bit base; symmetric sliding grooves are formed on both sides of a cutting seam of the drill bit base; the cutter is fixed in the sliding groove through a sliding rail, and is automatically opened by sliding down along the sliding groove under resistance to rotate and ream; the cutter pushes the sliding rod to slide down to compress the spring, the drill rod is withdrawn after reaming, the spring pushes the sliding rod to slide up to drive the cutter to slide up, and the cutter returns to the original position; the drill rod in the hole is completely withdrawn, and cylindrical reaming is formed; the application only needs to replace the drill bit after drilling a relatively short hole, realizes reaming while drilling, and forms the reaming structure at one time, so that the workload of replacing the reaming drill bit can be greatly reduced; and the rock breaking capacity is relatively high, and the application is suitable for a relatively wide range of rock layers.

This disclosure includes a sucker rod string, a tubing protector, and a tool joint with a polycrystalline diamond element positioned thereon for mating with other surfaces in downhole applications. The polycrystalline diamond element can be positioned on the sucker rod guide, sucker rod connector, tubing protector, and tool joint.

The utility model provides blasting drilling equipment with a dust falling function, which relates to the technical field of drilling equipment and comprises a base, a driving mechanism is mounted at the top end of the base close to the left side, and a dust falling component is mounted at the top end of the base and positioned on the back of the driving mechanism. A water tank is installed at the corner, close to the right side and the back side, of the top end of the base, a control box is installed at the top end of the base and located on the front face of the water tank, the driving mechanism comprises a fixing base, a driving assembly is installed in the fixing base, a fixing block is installed at the top end of the fixing base, and a first motor is installed at the top end of the fixing block; water in the water tank is pumped out through the water pump and conveyed to the interior of the annular pipeline through the hose, surrounding type water spraying dust falling is conducted on the drill bit and the drill hole through the first spray head and the second spray head, and compared with a traditional dust falling mode, manpower consumption is greatly reduced, and practicability is effectively improved.

The invention discloses an annular pipe drilling machine, belongs to the technical field of drilling equipment, and solves the problem that the existing drilling equipment or excavating equipment is difficult to excavate an annular hole in the circumferential direction of a pipeline. The tunneling device comprises a fixing support and a tunneling device body, the fixing support is connected with an excavator or a gantry truss, an inner arc face matched with the radius of a pipeline is arranged at the bottom of the fixing support, and the tunneling device body is installed in the fixing support in a sliding mode. The sliding track line of the tunneling device and the inner arc face of the fixing support are parallel and concentric. According to the annular pipe drilling machine, holes can be excavated in the pipe diameter direction of the PCCP. The invention further discloses a construction method of the annular pipe drilling machine. The construction efficiency can be effectively improved through the method.

The petroleum drilling system comprises a base, the base is horizontally placed on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above the base in a lifting mode, a first motor is arranged above the transverse plate, and an outer pipe is arranged below the transverse plate; the top of the outer pipe is connected with an output shaft of the first motor pair, a drill bit is arranged at the bottom of the outer pipe, and a hole channel is formed in the drill bit in a penetrating mode and communicates with the outer pipe. An inner pipe is arranged on the inner side of the outer pipe, a plurality of adjusting assemblies are arranged below the inner pipe, each adjusting assembly is connected with the inner side wall of the outer pipe, and the size of an opening in the upper end of a space formed by the adjusting assemblies is larger than that of an opening in the lower end of the space. A water pump and a liquid tank are further arranged on the base; the water pump can control the liquid tank to enable drilling fluid to enter and exit from the inner pipe and the outer pipe; by replacing the manufacturing material of the inner pipe, the overall mass of the inner pipe is lighter, and then the fixing degree of the plug pin to the inner pipe is improved.

The utility model discloses a TJS main shaft drilling device capable of moving up and down, and belongs to the technical field of drilling devices. A TJS spindle drilling device capable of moving up and down comprises a vehicle body; the vehicle body comprises a vehicle frame; the fixed plate is fixedly connected with the frame; the first turntable is rotationally connected with the fixed plate; the first driving piece is mounted on the fixing plate and used for driving the first rotating disc to rotate; the fixing frame is fixedly connected with the first rotating disc; the first guide column is fixedly connected with the fixing frame; the first sliding block is vertically and slidably connected with the first guide column; a cylinder body of the first hydraulic cylinder is fixed with the first turntable, and an output shaft of the first hydraulic cylinder is fixed with the first slider; the guide block is fixedly connected with the first sliding block; and the second sliding block and the guide block are horizontally and slidably connected with the spraying piece, and the second sliding block is installed on the adjusting block and used for reducing dust during drilling. The TJS main shaft drilling device capable of moving up and down has the beneficial effect that the TJS main shaft drilling device capable of moving up and down is better in dust falling function.

The application relates to a directional drilling structure for a navigable river and an application method thereof, and relates to the drilling technology field; the directional drilling structure for the navigable river comprises a drill bit body, an agitating frame is rotationally connected to the end of the drill bit body, a control element is arranged on the drill bit body, and the control element is used for driving the agitating frame to rotate; the application has the effect of reducing the possibility of yaw in the drilling process of the drilling equipment.

The utility model discloses a coal mine underground drilling dust prevention device, and relates to the technical field of underground drilling dust prevention. The underground coal mine drilling dustproof device comprises a dustproof cover, a rotating rod is movably arranged on the dustproof cover, one end of the rotating rod is connected with a drill bit, two connecting rods are rotatably arranged on the inner wall of the dustproof cover, one end of each connecting rod is connected with a cylindrical gear, a rotating shaft is fixed to one end of each cylindrical gear, and two dust discharging pipes are oppositely embedded in the dustproof cover. The ends, close to the drill bit, of the two dust discharging pipes communicate with volutes, impellers are arranged in the volutes, the rotating shaft is rotationally connected with the volutes, the impellers are arranged on the rotating shaft, and a movable gear is arranged on the rotating rod and meshed with the cylindrical gear, so that when the rotating rod drives the drill bit to conduct drilling, through cooperation of the cylindrical gear, the rotating shaft and the impellers, the dust discharging pipes can be driven to drill. And dust generated by drilling is absorbed and is discharged outwards through the volute and the dust discharging pipe, and the dustproof effect in the drilling process is effectively 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.