2511 results about "Pilot hole" patented technology

Devices, systems, and methods thereof for treating fractures of the foot using staples and a staple inserter. A drill guide for surgical implantation systems includes features using k-wires received through a drill guide head to assist with drilling of pilot holes. A staple inserter may have features which take advantage of k-wires used in connection with the drill guide. An associated tamp may be employed in conjunction with staple implantation procedures. Surgical staples may also have certain geometries to foster improved compression characteristics.

This invention relates to a reamer assembly (6) for enlarging a substantially horizontal pilot hole (14) in the ground to produce a bore hole (18), including a cutter (21) which is rotatable about an axis X-X. A gear box (20) is positioned on a first side of the cutter (21) for interacting with a drive shaft (33) which is rotated about the axis X-X by a drive apparatus (2) outside the pilot bore hole (14) and a body (15) positioned on a second side of the cutter (21) for transferring thrust from a thrust apparatus (4) outside of the enlarged bore hole (18) to the cutter (21).

The invention discloses expanding equipment for a hot-rolled seamless steel pipe and an expanding process thereof, and relates to the technical field of seamless steel pipe machining, the expanding equipment comprises a rack and a positioning assembly, an expanding assembly is arranged at one end of the rack, and the positioning assembly is arranged at the rear part of the expanding assembly; the positioning assembly comprises a synchronous rod, a lifting plate, a limiting plate, a limiting strip, a long-strip-shaped hole, a lifting frame, a guide hole, a driving rod and a clamping plate. When a driving seat pulls an expanding head through a pull rod to expand the diameter of a steel pipe, the driving seat can drive a limiting plate to slide through a synchronous rod and a lifting plate, at the moment, a guide hole in a lifting frame can limit the moving direction of a driving rod so that the driving rod can only move vertically, and then the height of the driving rod can be controlled through a long-strip-shaped hole; and the protruding part in the middle of the long-strip-shaped hole is further located at the diameter expanding head, so that the clamping plate located near the diameter expanding head can be automatically loosened, and the situation that the diameter expanding effect is affected due to the fact that the steel pipe is externally extruded in the diameter expanding process is avoided.

The invention discloses a fabricated building based on a BIM technology and a construction method, and relates to the technical field of fabricated buildings. The structure comprises a floor and a prefabricated wall body, multiple sets of embedded steel bars are arranged at the top of the floor, the outer sides of the embedded steel bars are sleeved with positioning assemblies, multiple sets of assembling holes are formed in the bottom of the prefabricated wall body, the inner diameter of each assembling hole is larger than the outer diameter of each embedded steel bar, and each positioning assembly comprises a positioning outer cylinder and an adjusting inner cylinder; and the adjusting inner cylinder is sleeved on the embedded steel bar. A limiting piece is controlled to slide downwards along a guide hole, at the moment, a telescopic rod can slide in the direction of a positioning outer cylinder, and along with continuous descending of a prefabricated wall, the lower half portion of the hinged position of a positioning supporting rod continuously swings inwards, the upper half portion of the hinged position of the positioning supporting rod swings outwards, and the telescopic rod slides into a sliding cavity; therefore, the gap can be adjusted while the position stability of the prefabricated wall is guaranteed, a cushion block does not need to be independently arranged, construction is easy, and the construction precision is high.

The invention provides a clamp for milling, drilling and tapping integrated machining equipment, and relates to the technical field of shaft workpiece machining clamps. Comprising two sets of clamping mechanisms and four sets of moving driving mechanisms, each set of clamping mechanism comprises two clamping units capable of being matched with each other for clamping, the moving driving mechanisms drive the first set of clamping mechanism and the second set of clamping mechanism to be away from each other, and the second set of clamping mechanism moves towards the end, to be polished, of the shaft workpiece. The friction force between the outer surface of the shaft workpiece and a driving roller of a second group of clamping mechanisms enables the driving roller to overcome the action of a third driving spring to move in the axial direction relative to a second central shaft, and the end part of a rod grinding tool is propped against a slope propping block; the bevel abutting block drives the tool bit of the rod grinding tool to stretch out of the guide hole so as to grind the outer surface of the shaft workpiece. According to the clamp for the milling, drilling and tapping integrated machining equipment, the outer surface of a shaft workpiece can be polished while the shaft workpiece is clamped, and therefore the clamping and positioning accuracy during milling, drilling and tapping machining is improved.

The utility model belongs to the technical field of exploration drilling tools, in particular to a geological coring drilling tool capable of realizing continuous drilling along with a casing, which comprises a casing body, a drill rod sleeved in the casing body, a female joint fixedly connected to the bottom end of the drill rod, a male joint in threaded connection to the bottom end of the female joint, a reaming shell fixedly connected to the bottom end of the male joint, and a drilling rod connected with the reaming shell. A reaming drill bit is arranged on the surface of the reaming shell, an adjusting mechanism is arranged between one side of the reaming drill bit and the interior of the reaming shell, and fixing rods are fixedly connected to the two sides of the bottom of the reaming shell. The external expanding drilling diameter of the expanding drill bit can be adjusted, so that holes with different sizes can be drilled according to requirements, the drilling device is more flexible in use and very convenient and rapid to adjust, in addition, the pilot hole drill bit can be conveniently disassembled and assembled, and the drilling efficiency is improved. Therefore, the damaged collar hole drill bit can be independently detached to be replaced, operation is easy, and the maintenance cost is saved.

The invention relates to an expanding drill device for expanding a pilot bore produced from a starting point to a target point in the ground along a specified drilling line by moving the expanding drill device (10) along the specified drilling line in order to produce a bore in the ground or in rock for introducing a pipeline or a supporting system into the expanded bore, comprising: a housing (11); a drill head (14) that has a cutting wheel (15) which is arranged on the drill side (21) of the expanding drill device (10) so as to be rotatably mounted and driven about a rotational axis and relative to the housing and on which at least one drill tool (16) for loosening the ground or the rock is arranged; and a drill-side connection for producing a connection to a pipe section located in the pilot bore on the drill side, wherein the drill side (21) centrally has at least one receiving chamber (24) for the loosened ground or the loosened rock, said receiving chamber being connected to a material conveyor device of the expanding drill device (10) for the loosened ground or the loosened rock via at least one removal opening (30); the drill side (21) has at least one drill chamber (38) that is equipped with the cutting wheel (15), which is arranged about the receiving chamber (24); the cutting wheel (15) has an annular design and is rotatably arranged about the central receiving chamber (24); and the receiving chamber (24) is connected to the drill chamber (38) via at least one conveyor opening (41) so that the loosened ground or the loosened rock can be conveyed into the receiving chamber (24) through the conveyor opening (41). According to the invention, at least one crusher (46) is provided in the drill chamber (38); the crusher (46) has crusher strips (49) on the rotatable cutting wheel (15) which move together with the cutting wheel (15) and crusher strips (47) on the receiving chamber (24) side facing the drill chamber (38) which are rigidly arranged together with the receiving chamber (24); and the crusher strips (47, 49) are arranged relative to one another such that a crusher gap (50) is produced between the crusher strips.

The utility model belongs to the technical field of pipe expanding tools, and particularly relates to an electric pipe expander main machine which comprises a pipe expanding device. The driving device is mounted on the pipe expanding device and used for driving the pipe expanding device to work; the pipe expanding device comprises a machine base, a pipe expanding device and a pipe expanding device, the transmission mechanism is rotationally arranged in the machine base, the rear end of the transmission mechanism extends into the box shell, and the transmission mechanism is connected with the driving device; the eccentric mechanism is installed in the machine base, and the rear end of the eccentric mechanism is arranged in the transmission mechanism; the rear end of the thread feeding mechanism is provided with a thread box shell, and the front end is connected with the eccentric mechanism; the eccentric mechanism at least comprises: an eccentric seat, the rear end of which protrudes to form a guide part, and the guide part is internally provided with a guide hole; the buffer assembly of the thread feeding mechanism is installed on the guide part, the front end of the screw of the thread feeding mechanism is inserted into the guide hole and connected with the buffer assembly through the pin shaft, the screw extends into the guide hole and is restrained by the guide hole, the coaxiality of the screw and the eccentric seat is high, the durability of the pipe expander is improved, and the service life of the pipe expander is prolonged.

The disclosure describes an expanding drill device for expanding a pilot bore by moving the expanding drill device along a specified drilling line comprising: a housing; a drill head that has a cutting wheel which is arranged on the drill side of the expanding drill device so as to be rotatably mounted and driven about a rotational axis and relative to the housing and on which at least one drill tool for loosening the ground or the rock is arranged; and a drill-side connection for producing a connection to a pipe section located in the pilot bore on the drill side, wherein the drill side centrally has at least one receiving chamber for the loosened ground or the loosened rock, said receiving chamber being connected to a material conveyor device of the expanding drill device.

The utility model relates to the technical field of steel member machining, in particular to an adjustable bending device for steel member machining, which comprises a bending table, a controller is arranged on the front side of the bending table, a guide hole is arranged on the upper side of the bending table, and a lifting part for adjusting the bending thickness of a steel plate is arranged on the lower side of the bending table. An adjusting part used for adjusting the steel plate bending supporting distance is arranged on one side of the lifting part, a bending part is arranged on the upper side of the bending table, the lifting part comprises a guide assembly and a driving assembly, the guide assembly comprises a base, the base is arranged on the lower side of the bending table, a guide rod is arranged on the upper side of the base, and a moving plate is arranged on the outer side of the guide rod. And a limiting ring is arranged at the bottom end of the outer side of the guide rod. The problem that the bending device cannot be adaptively adjusted according to the thickness of a steel member is solved.

A punch rivet connection having at least two joining partners, which are connectable to one another in a setting process, in which a semi-tubular punch rivet is drivable in a setting direction with its rivet foot through the setting-side joining partner into the die-side joining partner, while maintaining a residual base thickness in the die-side joining partner and with spreading of the rivet foot, so that the joining partner, viewed in the setting direction, is clamped under compressive stress between a rivet head and a rivet foot cutting edge of the semi-tubular punch rivet. The setting-side joining partner includes a pilot hole through which the semi-tubular punch rivet is drivable into the die-side joining partner, so that in the setting-side joining partner a build-up of shear stress transverse to the setting direction is reduced or eliminated.

The invention discloses a solid waste recycling forming machining die, and relates to the technical field of bicycle production waste reutilization, the solid waste recycling forming machining die comprises a lower die mechanism, an upper die mechanism is arranged on the lower die mechanism, a pressing mechanism is arranged on the upper die mechanism, and a male die set is arranged in the middle of the bottom wall of an upper die base; the material pressing mechanism comprises a first spring and a material pressing plate which are arranged on the upper die base, and further comprises an elastic ejector block set arranged on the material pressing plate and a guide hole site set formed in the material pressing plate in an up-down penetrating mode. The die has the advantages that the same die carries out stepped continuous punching operation, punching stress can be reduced, and the probability of deformation of the disc brake during punching is reduced; residual stress existing in the punched disc brake disc can be redistributed through attaching and pressure maintaining, and the situation that due to the fact that large holes and small holes in the disc brake disc are evenly and densely distributed in position, local deformation is generated is prevented; and the elastic ejector block group applies uniform elastic pressing force to the disc brake disc, so that the probability of deformation of the disc brake disc during rigid demolding is reduced.

The invention discloses an anchoring enhancement type self-drilling grouting anchor rod with telescopic grouting holes and a using method of the anchoring enhancement type self-drilling grouting anchor rod, and relates to the technical field of roadway supporting, the anchoring enhancement type self-drilling grouting anchor rod comprises a hollow grouting anchor rod body, and a plurality of anchoring grouting assemblies are installed in the length direction of the grouting anchor rod body; each anchoring and grouting assembly comprises a plurality of guide holes formed in the circumferential direction of the grouting anchor rod, the guide holes penetrate through the side wall of the grouting anchor rod, grouting anchoring nails with the tips close to the outside are slidably installed in the guide holes, and the total length of the grouting anchoring nails is larger than the thickness of the side wall of the grouting anchor rod and smaller than the radius of the outer wall of the grouting anchor rod. A pushing ball is installed in an inner cavity of the grouting anchor rod in a rolling mode, and a gap is formed between the pushing ball and the wall of the inner cavity of the grouting anchor rod. Through the innovative telescopic grouting anchoring nail structure, the grouting anchoring nail is inserted into the broken surrounding rock of the roadway under the action of pressure during grouting, so that the friction force between the grouting anchor rod and the surrounding rock is remarkably enhanced, the anchoring effect is improved, and meanwhile, the risk that the grouting anchor rod pops up due to the fact that the grouting pressure is too large is effectively prevented.

The utility model discloses a constant power controller with pressure control for a high-pressure plunger pump, which comprises a shell, a variable piston is arranged in the shell, a return spring connected with the shell is arranged at the small end of the variable piston, a shifting block rotationally connected with the shell is arranged on the radial side of the variable piston, and a power control valve is arranged on one side of the shifting block. A variable supporting column extending towards the shifting block is arranged on the variable piston in the radial direction, a guide hole is formed in the end face of the variable supporting column, the bottom face of the guide hole is communicated with the small end of the variable piston, a variable plunger is arranged in the guide hole and comprises a plunger body and a sliding shoe, the plunger body is in sliding connection with the variable supporting column, and one side of the sliding shoe is in spherical hinge joint with the plunger body. And the other side of the sliding shoe is in surface contact with the shifting block. The utility model has the advantages of longer service life and higher constant power control precision.

The drilling machine includes a spindle, a spindle motor, a frame including, a linear motion guide support plate, a motor support portion, and a ram support plate disposed at a front end of the linear motion guide support plate, and having a height lower than the motor support portion, a linear motion guide disposed on the reference surface, a slider having a nut mounting hole to reciprocate along the linear motion guide, and having a height substantially the same as the motor support portion, a ram penetrating the first ram guide hole, a feed screw including a screw shaft having a rear end supported by the motor support portion and a front end that is a free end, and a nut fastened to the nut mounting hole; and a feed motor connected to the screw shaft.

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

The utility model discloses a radius-drawing adjustable automatic water drilling machine, and belongs to the technical field of wall water drilling machines. The device mainly comprises a fixed seat and a base which are arranged up and down, a transmission mechanism and at least two groups of guide assemblies are arranged between the fixed seat and the base, the transmission mechanism and the guide assemblies are jointly connected with a pull-out gear box in a sliding mode, a drill barrel body used for drilling is arranged at the output end of the pull-out gear box, and the pull-out gear box comprises a lower fixed seat. A gearbox body is connected into the lower fixing base in a sliding mode, a second guide hole matched with the guide assembly and a second transmission hole matched with the transmission mechanism are formed in the lower fixing base, and a second long-strip-shaped hole matched with the transmission mechanism is formed in the gearbox body. According to the water drilling machine, the drawing type gear box is additionally arranged, the drilling barrel body with the corresponding hole diameter is replaced according to the size of a hole to be drilled, adjustment and use are convenient, and the universality of the water drilling machine is improved.

The utility model provides a U-shaped coded lock, and belongs to the technical field of locks. The problem of insufficient reliability is solved. The lock comprises a lock body and a U-shaped lock beam, a locking mechanism capable of locking the lock beam and the lock body is further arranged in the lock body, the locking mechanism comprises a rolling wheel coded lock, the outer wheel face part of a rolling wheel in the rolling wheel coded lock is exposed out of the lock body, and a jacking block and a supporting spring are arranged in the lock body. The two ends, in the direction perpendicular to a wheel shaft in the roller coded lock, of the jacking block are the first end and the second end respectively, a guide column is arranged in the lock body, a guide hole penetrating through the second end of the jacking block is formed in the jacking block, the guide column is partially located in the guide hole, and the supporting spring acts on the jacking block and enables the first end of the jacking block to abut against the inner wall of the lock body. A through hole is formed in the position, corresponding to the abutting position of the first end of the jacking block, of the outer side of the lock body, the jacking block abuts against one end of the wheel shaft, and when the jacking block overcomes the elastic force of the supporting spring to move, the wheel shaft can be pushed to move horizontally. And the reliability is high.

The invention relates to a thin film sheet separating device. According to the thin film separating device, a guide hole is formed in a shell assembly in the jacking direction; the number of the jacking blocks is at least two, the jacking blocks are sleeved with each other in a sliding mode, each jacking block comprises a jacking part and a sliding part, the jacking parts are arranged in the guide holes in a sliding mode, the sliding parts are provided with sliding grooves, the sliding grooves are provided with a same rolling shaft in a penetrating mode, the rolling shaft is arranged on the sliding seat, the sliding grooves are provided with inclined sections which are not overlapped, and the inclined sections are arranged on the sliding seat. When the rolling shafts move on the inclined sections, the corresponding jacking blocks are driven to move in the jacking direction; the driving assembly drives the sliding base to slide through the push rod, and then the rolling shaft is driven to slide along the sliding groove. The thin film separating device has the advantages of being simple and compact in structure, high in flexibility and not prone to being stuck.

The invention belongs to the technical field of lighting devices, particularly relates to a down lamp mounting structure, a down lamp and a use method of the down lamp, and aims to solve the problems that existing bolt connection often causes damage to a ceiling, bolts cannot stably mount the down lamp on the ceiling, and the down lamp and the ceiling are extremely inconvenient to detach. Comprising an installation cylinder installed in a preset installation hole of a ceiling, the outer wall of the installation cylinder is rotationally sleeved with a rotating ring located below the ceiling, a plurality of guide holes are formed in the installation cylinder, pressing plates are arranged in the guide holes in a sliding fit mode, and the pressing plates and the rotating ring are matched to be used for clamping and fixing the installation cylinder and the ceiling; according to the mounting device, clamping and fixing of the mounting cylinder and the ceiling can be easily controlled through rotation of the rotating ring, the mounting stability between the mounting cylinder and the ceiling is guaranteed, when the cylinder body is mounted, operation is easy, dismounting between the cylinder body and the mounting cylinder can be easily completed, and later cylinder body replacement is facilitated.

A secondary shaft formation construction method based on a raise boring process. A directional drilling rig (3), a composite drill pipe (5) and a directional drill bit (4) are used for drilling a directional borehole (8), and after the directional borehole (8) is drilled, the composite drill pipe (5) is tripped out, a deviation of the directional borehole (8) is measured, and a raise boring machine (9) is installed; a small raise boring pipe (10) and a reamer bit (11) are connected, and the reamer bit (11) drills along the directional borehole (8) for secondary reaming to form a pilot hole (12); then, the reamer bit (11) is replaced with a small raise boring bit (13), and the small raise boring pipe (10) is tripped out to drive the small raise boring bit (13) to excavate along the pilot hole (12) to form a guide shaft (14); the small raise boring pipe (10) and the small raise boring bit (13) are removed, a large raise boring pipe (15) is tripped into the guide shaft (14) downwardly along a design direction of a vertical / inclined shaft (17), a large raise boring bit (16) is connected, and the raise boring machine (9) drives and lifts the large raise boring bit (16) to excavate along the guide shaft (14) to form a shaft. On the basis of first excavating the guide shaft (14) using the raise boring machine (9), a secondary reaming technology is implemented, so that the influence of a deviation of the directional borehole (8) on shaft formation is effectively eliminated.

The utility model belongs to the technical field of engineering construction, and particularly relates to a deviation rectifying device which comprises a guide seat, a plurality of guide holes are formed in the guide seat, a single steel strand penetrates through each guide hole, a mounting seat is arranged on the periphery of the guide seat, an acute angle is formed between the upper seat surface and the lower seat surface of the mounting seat, and the center line of each guide hole is a curve section. The bending direction of the center line of the guide hole is opposite to the opening direction of the included angle between the upper and lower seat surfaces of the mounting seat. After the mounting seat is abutted against and matched with the pipe orifice of the embedded pipe, the mounting seat is rotated to enable the bending direction of the guide hole in the guide seat to be consistent with the preset deflection direction of the cable body, and the guide hole forces the steel strand penetrating through the guide hole to deflect towards the pipe orifice at the other end of the embedded pipe; therefore, stable and reliable installation of the cable body is achieved under the condition that the embedded pipe body or an embedded pipe embedded structure is not damaged.

The invention belongs to the technical field of machine tool accessories, and particularly relates to a workpiece self-centering support frame for a honing machine tool, which comprises a fixed seat and a first workpiece limiting support seat, the first workpiece limiting supporting seat is connected to the fixing seat in a sliding mode through a supporting seat driving sliding mechanism so that the first workpiece limiting supporting seat can slide up and down in a reciprocating mode, at least one swing centering arm is arranged on one side of the fixing seat in the width direction, the lower end of the swing centering arm is hinged to the fixing seat, and the upper end of the swing centering arm is a contact centering end. An arc-shaped guide hole is formed in the swing centering arm, a guide column matched with the arc-shaped guide hole is arranged on the first workpiece limiting supporting base, and the swing centering arm is driven to swing in a reciprocating mode through sliding fit of the guide column and the arc-shaped guide hole. According to the workpiece self-centering supporting frame for the honing machine tool, self-centering supporting can be achieved, and the workpiece self-centering supporting frame for the honing machine tool has the advantages of being simple in structure, low in cost and the like and can be used as a substitute in machining of some machine tools.

The utility model relates to a fixture, in particular to a fixture for intermediate shafts and two-axis milling keys, which solves the problem that when performing intermediate shaft and two-axis processing conversion, the corresponding fixture needs to be replaced as a whole, which wastes production time and makes the processing efficiency relatively low. The utility model comprises a base plate and a fixed center and a movable center which are relatively arranged on the base plate and are used to cooperate with the center holes at both ends of the intermediate shaft or the two shafts to achieve axial positioning. An intermediate shaft angular positioning piece is arranged on the base plate, and the intermediate shaft angular positioning piece cooperates with the gear tooth groove on the intermediate shaft through the intermediate shaft tooth piece in its first guide hole to complete the rotation limit of the intermediate shaft; a two-axis angular positioning piece is also arranged on the base plate, and the two-axis angular positioning piece cooperates with the spline groove on the two shafts through the two-axis tooth piece in its second guide hole to complete the rotation limit of the two shafts.

The utility model discloses a PCB welding fixture, which relates to the field of PCB welding, and includes a bottom support mechanism, a storage plate, a lifting drive component, a support plate and an adjustment mechanism. Both sides of the upper part of the storage plate are provided with a first strip guide hole. The adjustment mechanism includes two adjustment components and two pressure plates. The adjustment component includes a moving part, a pressure block and two sliding parts. Both ends of each moving part respectively pass through the two first strip guide holes to extend to the bottom and are slidably installed on the support plate. The lower parts of the two sliding parts in each adjustment component are respectively slidably installed in the two first strip slide grooves. The upper parts of the two sliding parts in each adjustment component can slide along the length direction of the moving part. The sliding part connects the pressure plate with the moving part and enables the pressure plate to reciprocate along the vertical direction with the moving part. The pressure block is fixed to the middle part of the moving part. The PCB welding fixture greatly increases the application range of the device, reduces production costs, and improves work efficiency.

The utility model discloses a concrete pile foundation over-filling automatic reminding device which comprises a buoyancy plate and a center block which are correspondingly arranged up and down, pouring pipe positioning holes are formed in the center of the buoyancy plate and the center of the center block in a penetrating mode, and vibrating rod positioning holes are distributed in the two sides of each pouring pipe positioning hole. The buoyancy plate and the center block are connected through a connecting rod arranged in an up-down guiding mode, the bottom end of the connecting rod is fixed to the buoyancy plate, a connecting block is arranged at the upper end of the connecting rod, the connecting block is installed in a guiding hole in the center block in a guiding mode, a spring is clamped in the guiding hole, and a pressure sensor is clamped at the top of the spring. The pressure sensor is in electric signal connection with the controller, and an erection supporting assembly is arranged on the periphery of the center block. The device is reasonable in structural design, and the pressure sensor senses pressure data of the buoyancy plate and feeds back the pressure data to the controller, so that the concrete pouring degree can be accurately controlled, the situation that concrete overflows from a pile foundation mold during concrete pile foundation pouring is avoided, and waste is avoided.

The invention discloses a vertical shaft duct piece splicing device and a construction method thereof, and belongs to the technical field of vertical shaft engineering construction.The vertical shaft duct piece splicing device comprises a moving trolley, an overturning assembly, a clamping mechanism and a lifting mechanism, a support of the overturning assembly is vertically arranged on the moving trolley, and an overturning plate is rotationally connected to the support and provided with two guide columns; the overturning oil cylinder is used for driving the overturning plate to be switched between the horizontal state and the vertical state. A base of the clamping mechanism is provided with two guide holes for two guide columns to penetrate through, a clamping piece is rotationally arranged in a rotating groove of the base, an elastic piece is installed in the rotating groove and connected with the clamping piece, and when a duct piece is placed on a turnover plate in a horizontal state, the clamping piece can be pushed to be rotationally inserted into a hanging hole of the duct piece, and the elastic piece is stretched. The lifting mechanism is arranged on the overturning plate and can drive the base to drive the clamping piece to vertically move downwards. The vertical shaft duct piece splicing construction method adopts the vertical shaft duct piece splicing device. The device is high in stability, high in assembly precision and low in safety risk.

The invention discloses a fan impeller multi-angle welding platform, and belongs to the technical field of fan impeller welding, the fan impeller multi-angle welding platform comprises a working table, a welding table is mounted on the working table, a clamping assembly is mounted on the working table, the clamping assembly comprises a clamping disc arranged above the welding table, a plurality of groups of guide holes used for placing blades are formed in the clamping disc, and the welding table is mounted on the clamping disc; a limiting piece is mounted on the clamping disc, and the limiting piece is driven to limit the blades in the guide holes at the same time; according to the multi-angle welding platform provided by the invention, the clamping disc is arranged above the welding table, and the guide holes of which the number is the same as that of the blades of the impeller are formed in the clamping disc, so that all the blades can be placed in the guide holes in the clamping disc at a time before welding; and the blades are fixed on the clamping disc through the limiting pieces arranged on the clamping disc, so that the working efficiency is improved, and meanwhile, the problem of blade dislocation caused by fixing the blades in batches is also avoided.

The invention provides a material ejecting mechanism for an automobile engine casting mold, and belongs to the technical field of metal casting, the material ejecting mechanism for the automobile engine casting mold comprises a rack and a table top located above the rack, a mold pressing mechanism is arranged on the upper surface of the table top, and when the mold pressing mechanism is closed, a mold cavity for pouring can be formed; a supporting plate capable of sliding up and down is arranged on the rack, an ejector rod is mounted on the supporting plate, a through hole is formed in the table top, a guide hole communicated with the through hole is formed in the mold pressing mechanism, and the ejector rod penetrates through the table top and the mold pressing mechanism through the guide hole and the through hole to reach the interior of the mold cavity and is used for demolding a casting; the ejector rod is driven by the supporting plate to move up and down, cold air is fed into the cavity through the circulation channel, the bottom of the casting and the ejector rod are cooled, and the situation that the bottom of the casting deforms when the ejector rod ejects the casting and the ejector rod deforms due to frequent heating is prevented.

The utility model discloses a chain saw with a quick release function. The chain saw comprises a chain saw main machine and a chain plate assembly, the chain plate assembly is located on the right side of the chain saw main machine, a cover body used for covering the rear end of the chain plate assembly is arranged on the right side of the chain saw main machine, the chain saw main machine is connected with the chain plate assembly through a quick release assembly, and a main driving wheel is arranged on the right end face of the chain saw main machine. A chain saw chain is in power connection between the chain plate assembly and the main driving wheel, the quick release assembly comprises a guide hole formed in the right side of the chain saw main machine, the guide hole is formed in the front-back direction, a sliding block capable of sliding along the guide hole is arranged in the guide hole, and the right end of the sliding block extends out of the guide hole and is connected with the chain plate assembly. A locking assembly and a driving assembly are arranged on the chain saw main machine, the locking assembly is used for locking / unlocking the sliding block, and the driving assembly is used for driving the sliding block to move. The chain saw chain can be rapidly replaced, the replacement efficiency is high, and consumed time is short.