82 results about "Tube drawing" patented technology

The invention discloses a tube drawing prevention device capable of preventing wound seepage from flowing out, and relates to the technical field of medical instruments. The device comprises a bottom plate, a mounting structure is fixedly connected to the middle of the upper end face of the bottom plate, adjusting structures are symmetrically and fixedly connected to the lower end face of the bottom plate, fixing structures are symmetrically and slidably connected between the two adjusting structures, an anti-pulling structure is fixedly connected to the upper end face of the mounting structure, and a one-way flow blocking structure is arranged in the middle of an inner cavity of the mounting structure. A locking structure is fixedly connected to the left end face of the stabilizing structure on the left side, a lifting structure is arranged in the middle of an inner cavity of the locking structure, the distance between the two sliding blocks stretches out and draws back along a sliding rod by oppositely pulling the fixing frames, and therefore the distance between the fixing frames is adjusted by adjusting stretching out and drawing back of a spring; the drainage tube on the outer surface of the lower inserting tube is extruded and fixed, the stability of connection between the drainage tube and the lower inserting tube is ensured, and the drainage tube is prevented from loosening or falling off in the using process, especially under the condition that the body of a patient may move.

The invention relates to the technical field of pipe machining equipment, in particular to metal copper pipe drawing equipment which comprises a reducing die and further comprises an upper supporting frame and a lower supporting frame which are fixed to the outer side of the reducing die, a mounting frame is fixed to the lower supporting frame, and a flattening part used for flattening the outer side of a copper pipe is mounted on the mounting frame. The upper supporting frame and the lower supporting frame are provided with an extrusion part used for abutting against the outer side of a copper pipe and a rail frame fixed to the lower supporting frame, and a movable base is installed on the rail frame in a sliding mode. And the linkage piece and the pressurizing piece are matched to drive the necked copper pipe to move towards the mold and enable the necked opening to penetrate through the mold, automatic necking and mold penetrating operation are achieved, manual necking by a worker is not needed, manual assistance by the worker is not needed when the copper pipe is drawn in batches, and the plate pulling efficiency is higher.

The invention relates to the technical field of copper pipe drawing, in particular to a portable copper pipe drawing machine which comprises a drawing support, a power mechanism arranged on the drawing support and two clamping mechanisms arranged at the top of the drawing support in a central symmetry mode. A drawing die holder is arranged in the middle of the drawing support; the two clamping mechanisms are respectively connected with the power mechanism; the power mechanism is configured to be used for driving the two clamping mechanisms to synchronously and reversely reciprocate; the two sides of the top of the drawing support are each provided with an extrusion block and a driving groove. The extrusion block and the driving groove are configured to be used for enabling the clamping mechanism to be switched between a clamping state and a non-clamping state in the reciprocating motion process. And the two clamping mechanisms alternately clamp and draw the copper pipe penetrating into the drawing die holder, so that continuous drawing operation is realized, and the drawing efficiency of the copper pipe is improved.

The utility model relates to a full -automatic pipe drawing machine belongs to electric power industry plastic pipe production technical field, including frame, the frame top is installed and draws the strip mechanism and rotating mechanism, is equipped with the hopper in rotating mechanism top, draws the strip mechanism and includes X direction linear module, Y direction linear module, draws the strip motor and rigidity axle, Y direction linear module is fixed in the slide table of X direction linear module, draws the strip motor and is fixed in the slide table of Y direction linear module, and rigidity axle is connected with the output shaft drive of draws the strip motor, rotating mechanism includes support plate A, support plate B, rotating frame and rotating motor, and rotating frame both sides are connected with support plate A, support plate B rotation respectively, and rotating frame one end is connected with rotating motor transmission, and the both sides of rotating frame are equipped with the grooved index plate, the utility model has realized the automation of plastic pipe spiral strip's automatic drawing, has got rid of manual operation, has improved production efficiency, has reduced production cost, has improved product pass rate, has guaranteed the unity of product size.

The present invention discloses a device and an operation method for drawing heat transfer tubes, which include a tightening device, a limiting sleeve, a tube drawing device, a screw sleeve, a screw mandrel, an adjusting ring, an expansion ring and a locking member; the screw sleeve is sleeved on the screw mandrel; the tube drawing device is threadedly connected to the screw mandrel and is arranged adjacent to the screw sleeve; the limiting sleeve is sleeved on the screw mandrel; the limiting sleeve is provided with an oblong hole, and the tube drawing device passes through the oblong hole; the tightening device is threadedly connected to the screw mandrel and is located at one end of the limiting sleeve; a plurality of adjusting rings and a plurality of expansion rings can be sleeved on the screw mandrel for use in drawing and guiding tubes; the front end of the screw sleeve can abut against the adjusting ring or the expansion ring; the locking member is detachably arranged on the screw mandrel for restricting the adjusting ring or the expansion ring from disengaging from the screw mandrel. The present invention can draw and guide the heat transfer tubes, and can solve the problem that the heat transfer tubes of the current nuclear power steam generator are stuck and cannot be normally inserted into the tube sheet during tube insertion.

The utility model discloses a tube drawing and flanging all-in-one machine for a fluorine-lined liquid level meter, and relates to the field of liquid level meter processing equipment. The pipe drawing machine comprises a main body frame, a platform, a winch, a portal frame and the like, and the winch is arranged at one end of the main body frame; a straight pipe flanging electric push rod and a lifting stand column are arranged on the side portion of the platform, and a temperature sensor, an alarm and a water spray nozzle are matched to guarantee the machining quality. The device integrates pipe drawing, straight pipe flanging and branch through flanging functions, 14 universal wheels are arranged at the bottom, the device can move flexibly and adapt to workpieces of different specifications, operation is easy and convenient, and space and cost are saved.

The invention discloses a nickel-titanium memory alloy pipe as well as a preparation method and application thereof. The preparation method comprises the following steps: providing a nickel-titanium memory alloy bar, wherein the content of nickel in the bar is 54-58%; the bar is holed, and a pipe with the preset inner diameter is obtained; the pipe is drawn for multiple times through the empty drawing diameter reducing technology so as to reduce the diameter of the pipe, and after drawing is conducted every time, the area variable of the pipe does not exceed 15%; performing special-shaped treatment on the pipe subjected to diameter reduction to obtain a special-shaped pipe; and the special-shaped pipe is placed into a special-shaped forming module to be subjected to heat treatment, the memory alloy function of the special-shaped pipe is activated, so that a target pipe with the phase transition temperature ranging from-20 DEG C to 60 DEG C is obtained, the heat treatment temperature of the special-shaped forming module ranges from 500 DEG C to 530 DEG C, and the shaping duration ranges from 25 min to 35 min. The preparation method is simple in process, and the obtained target pipe can form a uniform and fine metallic luster surface, can be directly used as a structural appearance part, and has good environmental adaptability.

The invention relates to the technical field of copper pipe drawing, in particular to automatic copper pipe drawing equipment which comprises a main body plate, a drawing and bending mechanism for drawing a copper pipe and bending the radian of a die is arranged at the upper end of the main body plate, and the drawing and bending mechanism comprises two guide grooves symmetrically formed in the inner side face of the main body plate. The main body plate is slidably connected with connecting plates in the two guide grooves respectively, and the upper end of the main body plate is provided with a movable chambering mechanism for chambering the inner side surface during drawing and arc-shaped bending; the first winding device and the second winding device wind and unwind the connecting rope, so that the limiting ball is driven to reciprocate in the copper bar, the diameter of the limiting ball is the same as the designed inner diameter of the copper bar, the inner diameter is prevented from being smaller than a preset value when the copper bar is drawn, and the quality of the drawn copper bar is improved.

The utility model discloses an automatic glass tube drawing machine, which relates to the technical field of glass tube production equipment, and comprises a glass tube drawing machine, the bottom of the glass tube drawing machine is fixedly provided with a base support, the top of the glass tube drawing machine is fixedly provided with a blanking top plate, the center of the blanking top plate is provided with a feed hole which is through up and down, and the feed hole is communicated with the base support. The upper side and the lower side of the front end of the glass tube drawing machine are each provided with two tube drawing rotating wheels opposite in rotating direction, a cleaning mechanism is arranged at the bottom of the discharging top plate and comprises a long driving plate, the long driving plate is fixedly connected with the bottom of the discharging top plate, and the long driving plate is located on the front side of the feeding hole. According to the cleaning device, through mutual cooperation of the cleaning inclined plate, the L-shaped hanging plate and the chipping collecting box, chippings scraped by the cleaning inclined plate from the pipe pulling rotating wheel directly fall into the chipping collecting box to be collected, the chippings are effectively prevented from being directly scraped off, and the chippings are conveniently cleaned.

This invention discloses a disc-type tube drawing machine for heat dissipation tube processing, relating to the field of heat dissipation tube processing. It primarily addresses the technical problems of lacking online real-time detection in key processes of heat dissipation tube processing, leading to untimely detection of abnormal conditions, high defect rates, significant raw material waste, and low production efficiency. Specifically, it adds two independent dynamic annular diameter detection components between the bending and welding sections and after the diameter maintenance section. A wedge-type displacement conversion structure is used to convert radial dimension changes of the tube into axial displacement. Displacement sensors detect the tube's curvature and annular diameter in real time. Simultaneously, a disc-type multi-roller progressive bending structure improves welding accuracy, circumferential cutting removes weld slag, and multiple diameter maintenance passes ensure dimensional consistency. This constructs a complete "processing-detection-feedback" closed-loop production system, improving product qualification rate, production continuity, and equipment versatility. It is suitable for the automated processing of various types of heat dissipation tubes.

The invention relates to the technical field of copper pipe drawing, and discloses an automatic feeding device of a thin-wall copper pipe drawing machine, which comprises a conveying belt, a partition plate is fixedly connected to the surface of the conveying belt, and two rollers are arranged in the conveying belt. The rollers of the conveying belt are driven to rotate through the belt wheels and the belt, and the copper pipes are conveyed to the inclined placing frame in order through the partition plates on the surface of the conveying belt; a second motor in the blocking mechanism drives a worm and a worm gear to drive an oval block to rotate, and an adjusting plate, a tension spring and a rubber spacer block achieve batch flow limiting of the copper pipe; when the copper pipe slides down to the cleaning mechanism, the water tank sprays water through a nozzle, and the surface of the copper pipe is brushed through rotation of two cleaning rollers; then an electric push rod adjusts the angle of a swing rod to enable a clamping box to position the copper pipe, and a positive and negative rotation screw drives a clamping plate to clamp the copper pipe; and finally, the hydraulic rod pushes the push plate to precisely push the copper pipe into the drawing machine along the guide of the rolling wheels, the stabilizing rod ensures that the push plate moves linearly, and full-automatic feeding, cleaning and positioning are achieved.

The utility model relates to the technical field of tube drawing machines, in particular to a tube drawing machine for jewelry, which comprises a fixing table and an outer fixing frame arranged on the fixing table, the bottom of the outer fixing frame is fixedly connected to one side of the upper end of the fixing table, and a sliding block is slidably connected to the inside of the outer fixing frame through a sliding groove. An inner fixing frame is arranged in the outer fixing frame, the inner fixing frame is fixedly connected with the outer fixing frame, and an inner fixing device is arranged in the inner fixing frame in a sliding mode. The device has the advantages that the sliding block and the inner fixing device are arranged, the first motor drives and pushes the sliding block to be close to the inner fixing frame, the second motor drives the threaded rod to rotate in the threaded sleeve, so that the threaded sleeve is jacked up to deform, the threaded sleeve jacks up the jacking block to be close to the outer fixing frame, and therefore the precious metal pipe is fixed through internal and external cooperation; the precious metal is prevented from deforming during fixing, and the inner hole in the fixed side can be effectively prevented from deforming in the pulling process of the precious metal.

This utility model relates to the field of copper tube processing technology and discloses a copper tube drawing machine, including a mounting plate. The inner wall of the mounting plate is provided with a disassembly mechanism for convenient disassembly and maintenance. A circulation mechanism is fixedly connected to the bottom of the mounting plate for collecting and circulating lubricating oil. A protective mechanism is fixedly connected to the rear side of the mounting plate for protecting the internal structure. A mold is fixedly connected to the top surface of the mounting plate near the edge. The disassembly mechanism includes a guide groove located on the inner wall of the mounting plate. Multiple sliding grooves are formed on the top of the mounting plate near the edge. In this utility model, by pulling the second limiting plate, the clamping rod is pulled to compress the spring through the first limiting plate and move away from the inner wall of the clamping groove, achieving the purpose of rapid disassembly for maintenance, accelerating maintenance efficiency, and reducing maintenance costs.

The utility model discloses a continuous borosilicate glass ampoule bottle tube drawing forming device which comprises a shell frame, a chain scraper conveyor is rotationally connected to the inner side of the shell frame, a socket is arranged on the outer wall of the chain scraper conveyor, an ampoule bottle body is inserted into the socket, a first fixing frame is arranged at one end of the top of the shell frame, and a fixing plate is connected to the bottom of the first fixing frame in a lifting mode. A plurality of groups of mounting frames are arranged at one end of the fixing plate, second motors are mounted at the tops of the mounting frames, clamping drawing heads are rotationally connected to the inner sides of the mounting frames, through holes are formed in the inner sides of the clamping drawing heads, a compressed air pump is mounted at the top of the first fixing frame, an air outlet of the compressed air pump is connected with an air supply pipe, and one end of the air supply pipe is connected with the fixing plate; and the fixing plate is communicated with the clamping drawing head through a hose. According to the device, the phenomenon that ampoule bottle body materials remain on the inner side of the clamping and drawing head can be avoided, so that it is guaranteed that the clamping and drawing head can make normal contact with ampoule bottle bodies, normal operation of equipment is guaranteed, and the sealing efficiency and the working continuity are improved.

The invention provides a sandy gravel stratum cofferdam foundation controlled grouting method and structure. The sandy gravel stratum cofferdam foundation controlled grouting method comprises the following steps that S1, construction hole sites are measured and lofted, and a plurality of hole sites are marked; the drilling machine is moved to the lofting hole position, casing-following drilling is carried out, a casing pipe follows up to a bed rock section, and one-time hole forming is carried out; s2, a grouting structure is installed in the casing pipe, the grouting structure comprises a stop-grouting plug and a grout outlet head, and the stop-grouting plug and the grout outlet head are installed at the position of the last section of the casing pipe in the hole; s3, a section of sleeve is pulled out through a tube drawing bench; s4, grouting is conducted, and grouting is stopped after grouting of the section is completed; s5, the steps S3-S4 are repeated till grouting in the hole is completed, grouting is stopped, and the grouting structure is moved to the next hole position; and S6, the steps S2-S5 are repeated till grouting of all the hole positions in the working area is completed. The slurry concentration is automatically controlled, the operation is simpler, the convenience during grouting is improved, and the strength of manual operation is reduced; and the device adapts to different grouting conditions, the adaptive capacity is better, and grouting is more convenient.

The application discloses a paper bag cylinder pulling-off device, which comprises a device main body, a cam, a swing arm, a swing arm shaft, a first connecting rod and a swing shaft are arranged on the outer side of the device main body, the swing arm is connected to the cam, the swing arm shaft is arranged on the swing arm, the first connecting rod is connected to the swing arm and the swing shaft, a fourth belt, a driven roller, a second belt and a first belt are arranged in the device main body, a cylinder is arranged on the inner side of the upper end of the device main body, the outer side of the fourth belt is connected to a third connecting rod and a fourth connecting rod, the inner side of the driven roller is provided with a fourth clamping roller and a driving roller. The paper bag cylinder pulling-off device has the advantages that the cutting knife does not need to be frequently adjusted, the paper bag cylinder which is pulled tight is convenient for cutting, the front end of the paper bag cylinder has entered the belt when the previous bag cylinder is pulled off, the continuity of paper falling is ensured, the production efficiency is improved, and the purpose of solving the cutting knife adjustment difficulty and improving the production efficiency and the product yield is achieved.

The present invention discloses a combined die for drawing aluminum alloy thin-walled tubes and a drawing process, which relates to the technical field of aluminum alloy drawing processing. The combined die for drawing aluminum alloy thin-walled tubes is used to draw the thin wall of an aluminum alloy tube with an outer diameter of B mm and a wall thickness of 0.5 ± 0.05 mm into an aluminum alloy with an outer diameter of A mm and a wall thickness of 0.3 ± 0.05 mm. The combined die for drawing aluminum alloy thin-walled tubes and the drawing process optimize and improve the structures of the inner and outer drawing dies, conduct a combined matching design of the inner and outer dies, divide the deformation amount of the secondary drawing, process it in sections, and adopt a combined drawing method to perform a one-time drawing forming process, so as to realize the production mode of one-time forming of thin-walled tube drawing, which can effectively improve the production efficiency and save the production and processing costs and the corresponding consumption losses of resources and energy.

The utility model provides a traction structure for stretching a copper pipe. Belongs to the field of copper pipe processing. According to the technical key points, the device comprises a driving mechanism, the driving mechanism comprises two supporting frames which are symmetrically arranged, rotating shafts are symmetrically and rotationally connected between the two supporting frames, a motor is fixedly connected to one side of one supporting frame, and the output end of the motor is fixedly connected with one rotating shaft; chain wheels are symmetrically and fixedly connected to the outer sides of the two sets of rotating shafts, chains are connected between the two sets of chain wheels on the same side in a meshed mode, and a plurality of cross beams are evenly and fixedly connected between the two sets of chains; the fixing mechanism comprises guide plates which are symmetrically and fixedly connected to the side, away from the rotating shaft, of the cross beam, a guide rod slidably penetrates through the interior of each guide plate, and clamping blocks are fixedly connected to the opposite sides of the guide rods on the two sides; the utility model aims to provide a traction structure for stretching a copper pipe. The traction device is used for improving the copper pipe traction efficiency.

This invention relates to the field of copper tube drawing technology, specifically to a production equipment for drawing copper tubes. The equipment includes an internal oiling mechanism, a straightening mechanism, a pre-forming mechanism, a drawing die, and a cutting mechanism. The drawing die includes an outer die and a moving mandrel. The outer die includes a die sleeve and a die core. An axial through hole is formed on the die sleeve, and the die core is embedded in the through hole. The die core has a tapered mandrel hole that communicates with the through hole. The cross-section of the mandrel hole is cross-shaped and is used to mate with the moving mandrel. The moving mandrel includes a large-diameter section, a small-diameter section, and a transition section. The transition section smoothly connects the large-diameter section and the small-diameter section. The cross-sectional shape of the moving mandrel is the same as the cross-sectional shape of the mandrel hole. This invention solves the problem of low production efficiency in existing drawing methods.

The utility model provides a heat-resistant glass kiln tube drawing production device, which belongs to the field of glass production, and comprises a cutting assembly, the cutting assembly comprises a V-shaped plate, an annular plate, two sliding blocks and two cutting knives, the V-shaped plate penetrates through a supporting plate and is arranged in a sliding manner, the annular plate is fixedly arranged on the V-shaped plate, and the two sliding blocks are arranged on the V-shaped plate; arc-shaped guide rods are fixedly arranged at the two ends of one side of the annular plate correspondingly, and the two arc-shaped guide rods penetrate through the two sliding blocks correspondingly and are arranged in a sliding mode. The cutting assembly and the driving assembly are arranged, automatic pipe cutting operation is achieved, work efficiency is improved, and practicability is improved; a limiting assembly is further arranged, so that the flatness of a notch is ensured, the size error is avoided, and the stability of cutting work is improved; and a threaded rod is further arranged, so that the cutting requirements of glass tubes with different lengths can be met, and the adaptability is improved.

The utility model discloses a cold-rolled tube drawing head forming device, which belongs to the technical field of cold-rolled tubes and comprises a processing box, a first die arranged in the processing box, a movable second die arranged at one end of the first die, and a transverse moving block arranged at the bottom of the second die. And a moving mechanism used for moving the transverse moving block is arranged at the bottom end in the processing box, so that after the forming process, the first mold and the second mold can be easily separated, internal materials can be conveniently discharged, when the second mold and the first mold are assembled and the rectangular limiting block can be located in the U-shaped limiting block, an external pressurizing system is not needed, and the working efficiency is improved. The forming quality of materials between the first mold and the second mold can be guaranteed under the condition that external pressurization is not increased, and therefore the energy consumption and the operation cost of equipment are reduced.

The invention provides a tube drawing bench which is used for drawing out a sleeve and comprises a clamping seat, a lifting oil cylinder A, a lifting oil cylinder B, a lifting oil cylinder C, a lifting oil cylinder D, a padding object, a hydraulic nitrogen hammer A, a hydraulic nitrogen hammer B and a positioning device. A lifting oil cylinder A, a lifting oil cylinder B, a lifting oil cylinder C and a lifting oil cylinder D are symmetrically arranged on the clamping seat in four directions; the lower ends of the lifting oil cylinder A, the lifting oil cylinder B, the lifting oil cylinder C and the lifting oil cylinder D are connected with a construction site backing object; a hydraulic nitrogen hammer A and a hydraulic nitrogen hammer B are symmetrically arranged on the lower side of the clamping seat; during working, the lifting oil cylinder D, the lifting oil cylinder A, the lifting oil cylinder B, the lifting oil cylinder C and the lifting oil cylinder D of the clamping seat lift the sleeve upwards, so that the sleeve is in a tensioned state, the hydraulic nitrogen hammer A and the hydraulic nitrogen hammer B hit the lower surface of the clamping seat at set time intervals, and therefore the sleeve is in a state that the sleeve is pulled upwards and vibrates up and down at the same time.

The utility model relates to the technical field of magnesium alloy processing, and provides a heatable magnesium alloy tube drawing machine which comprises a tube drawing machine body, a tube drawing die is fixedly installed on the left side of the top of the tube drawing machine body, a sleeve is fixedly installed on the left side of the tube drawing machine body, and a plurality of heating wires are fixedly embedded in the sleeve. A water tank is fixedly embedded in the left side of the interior of the tube drawing machine body, a filter plate is fixedly embedded in the water tank, a water inlet pipeline is fixedly installed in the center of the bottom of the water tank, and a storage box is fixedly installed at the bottom of the water inlet pipeline. Cooling liquid can be sprayed out through the spray head, the temperature of the magnesium alloy pipe can be rapidly reduced, material performance reduction caused by overheating is avoided, meanwhile, the cooling liquid passes through a circulating system of the filter plate and the water tank, resource waste can be effectively reduced, and the production cost is reduced.

The utility model discloses a tube drawing die for an assembly line for producing foamed ceramic particle lightweight concrete wallboards, which not only has low processing cost, but also meets the modular processing requirements of factories, and improves the processing efficiency of the wallboards. In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the tube drawing die for the production line for producing the foamed ceramic particle lightweight concrete wallboard comprises two supporting coamings and two tube drawing supporting plates, the two supporting coamings are arranged oppositely, the two tube drawing supporting plates are arranged oppositely, and the two supporting coamings are arranged oppositely. The supporting coaming and the tube drawing supporting plate are matched to form a rectangular frame-shaped structure. A plurality of tube drawing holes are sequentially formed in the side face of each tube drawing supporting plate in the longitudinal direction of the tube drawing supporting plate, and the tube drawing holes in the two tube drawing supporting plates are in one-to-one correspondence. The device can be widely applied to the field of concrete wallboard production.

The present invention discloses a light weight ball bearing with enhanced strength and cooling effect. The weight of the said ball bearing is reduced by drawing curved profiling / corrugation over the inner surface (201) of inner ring (200) and outer surface (101) of the outer ring (102) through bar / tube drawing process wherein a steel bar is converted into a hollow tube and subsequently cold drawn through a profiled die. The said technical modifications reduce the raw material / weight of outer ring by up to 22-24% and reduce the raw material / weight of the inner ring by up to 18-20%. The said profiled ball bearing has 10% increase in fatigue strength, 40% higher push / pull load capacity and 7% improvement in heat transfer efficiency, thus the said profiling enhances the strength and cooling effect of ball bearing along with weight reduction of the same.

The utility model provides quartz tube induction furnace tube drawing equipment and a graphite heating body thereof. The graphite heating body is of a cylindrical structure, a strip-shaped notch is formed in the side wall of the graphite heating body, the notch penetrates through the side wall of the graphite heating body, the width of the notch is 0.5 mm-1 mm, and the height of the notch is 50 mm-85 mm. According to the graphite heating body of the quartz tube induction furnace tube drawing equipment, the strip-shaped notches are formed in the side wall of the graphite heating body, so that vortex radiant heat of an induction coil is cut off, the precision of drawing a quartz liner tube can be improved, and distortion of ovality and curvature of the quartz liner tube can be avoided.

The invention relates to the field of shield tunnel indoor model tests, and provides a test device and method for simulating rapid estimation of pipe drawing lifting grouting and stratum reinforcement effects. The test device comprises a model main body, a penetration device, a grouting device and a static sounding device, the model main body comprises a model box and a shield tunnel model arranged in the model box; the injection device is arranged on the upper portion of the model box, the injection device is connected with the grouting device to achieve simulation of pipe drawing, lifting and grouting, and the injection device is connected with the static sounding device to achieve collection of static sounding test data and rapid estimation of the stratum reinforcement effect. According to the method, refined simulation of pipe drawing lifting grouting in micro-disturbance grouting improvement can be achieved, and the reinforcement effect is rapidly estimated. By applying the technology, grouting construction parameters can be further optimized, and the grouting regulation efficiency and safety can be remarkably improved.

The invention discloses a heat transfer tube drawing device and an operation method. The heat transfer tube drawing device comprises a tightening device, a limiting sleeve, a tube drawing device, a screw sleeve, a screw mandrel, an adjusting ring, an expansion ring and a locking piece. The screw mandrel is sleeved with the screw sleeve. The pipe drawing device is in threaded connection with the screw mandrel and is arranged adjacent to the screw sleeve; the limiting sleeve is arranged on the screw mandrel in a sleeving manner; the limiting sleeve is provided with an oblong hole, and the pipe drawing device penetrates through the oblong hole. The tightening device is in threaded connection with the screw mandrel and is positioned at one end of the limiting sleeve; the adjusting rings and the expansion rings can be arranged on the screw mandrel in a sleeving manner and are used for drawing the guide pipe; the front end of the screw sleeve can abut against the adjusting ring or the expansion ring. The locking piece is detachably arranged on the screw mandrel and used for limiting the adjusting ring or the expansion ring from being separated from the screw mandrel. According to the invention, the heat transfer tube can be drawn and led, and the problem that the heat transfer tube of the nuclear power steam generator cannot be normally penetrated when being jammed when being penetrated into a tube plate at present can be solved.

The invention relates to a centrifugal machine for pipe fitting machining, and belongs to the field of pipe fitting machining equipment. The device comprises a pouring mechanism, a centrifugal main machine, core feeding mechanisms, a tube drawing mechanism, a protective cover and a dust removal cover, and is structurally characterized by further comprising a sand distribution mechanism, the centrifugal main machine is located in the protective cover, the front side and the rear side of the centrifugal main machine are each provided with one core feeding mechanism, and the sand distribution mechanism and the pouring mechanism are both arranged on the rear side of the centrifugal main machine; the dust removal cover and the pipe drawing mechanism are both arranged on the front side of the centrifugal main machine, the pouring mechanism and the sand distribution mechanism are arranged in the left-right direction, a pipe die is arranged in the centrifugal main machine, and the dust removal cover is arranged in a swinging mode and matched with the front end of the protective cover.

The invention relates to the technical field of drawing machining, in particular to an oil injection structure for copper pipe drawing deformation machining, which comprises a barrel I for a copper pipe to pass through, a spiral groove formed in the inner wall of the barrel I, and a plurality of sliding blocks arranged in the spiral groove in a sliding manner, each sliding block is provided with a telescopic rod capable of stretching out and drawing back in the radial direction of the first barrel, and the end of each telescopic rod is provided with an oil chamber. A plurality of oil chambers are guided and limited through a spiral groove, a plurality of sliding blocks, a plurality of telescopic rods and a plurality of hinges, so that the oil chambers can be spirally arranged, and when the telescopic rods stretch out and draw back, the radius of a spiral where the oil chambers are located changes, and therefore the purpose of adjusting the distance between the oil chambers and one axis of a barrel is achieved; and the multiple oil chambers move synchronously, so that it is guaranteed that the distances between the multiple oil chambers and the outer wall of the copper pipe are consistent, nozzles in the oil chambers can conveniently conduct oil spraying treatment on the copper pipes with different diameters, and the applicability of the structure is improved.