107 results about "Steel tube" patented technology

The invention discloses a mixed steel-concrete composite frame structure, belonging to the technical field of engineering structure. The frame structure comprises a composite column of reinforced special shaped steep pipe concrete, a composite beam of concrete-steel pipe partially filled lightweight aggregate concrete and a reinforced concrete floor; wherein, the composite column of reinforced special shaped steep pipe concrete comprises a steel pipe of a special shaped column, a longitudinal bar of the column, stirrup of the column, concrete outside the steel pipe of the column and core concrete inside the steel pipe of the column; the composite beam of concrete-steel pipe partially filled lightweight aggregate concrete comprises a steel pipe of the beam, an inner separator, a longitudinal bar of the beam, stirrup of the beam and concrete outside the steel pipe of the beam; the space formed by the steel pipes of the beam, which are positioned on the lower part of the steel pipe at the end of the beam and on the upper part of the steel pipe on the midspan of beam, and the inner separator is filled with the core lightweight aggregate concrete in the steel pipe of the beam. The frame structure of the invention has excellent fire and shock resistance and relatively light dead load, can be used in building structures such as residence and is convenient for effective use of building space.

The invention provides a hydraulic reciprocating seal dynamic property detection device and design. The device comprises a dynamic friction property detection module, an inner leakage detection module and an outer leakage detection module which share a part of a testing device. When a hydraulic cylinder (1) is connected with a first testing cylinder (2) through an S-shaped tension pressure sensor (4), the S-shaped tension pressure sensor only achieves a connection effect, and thus the structure of the outer leakage detection module and the structure of the dynamic friction property detection module are similar. As long as an oil level sensor (8) is additionally arranged on a left gland of the first testing cylinder, the oil level sensor is welded to the left gland of the first testing cylinder through a supporting steel tube. According to the detection device, under the premise that the function requirements of a hydraulic reciprocating structure and a hydraulic execution element are not changed, detection of the dynamic friction property and the leakage property of a hydraulic reciprocating seal in application is conducted according to the normal operation condition of the hydraulic execution element. According to the hydraulic reciprocating seal dynamic property detection device and design, analysis and evaluation of the dynamic property of the hydraulic reciprocating seal can be achieved.

The invention relates to a cutting device, and particularly relates to an efficient cutting device of a hardware steel pipe. The invention aims to solve the technical problem of providing the efficient cutting device of the hardware steel pipe, which has the advantages of high cutting efficiency, high cutting speed and time and labor saving. In order to solve the technical problem, the invention provides the efficient cutting device of the hardware steel pipe. The efficient cutting device comprises a placing platform, an electric manipulator, a support rod, a sliding block, a first spring, a baffle, a sliding rail, a lifting rod, a guide plate, a fixed plate, a contact roller, a small belt pulley, a cam, a left bracket, a top bracket, a first belt, a gear motor, a double-groove belt pulley, a reeling wheel, a big belt pulley, a pull wire, a second guide wheel and the like, wherein the left bracket and the like are arranged at the bottom of the top bracket in sequence from left to right. The efficient cutting device has the effects of high cutting efficiency, high cutting speed, time and labor saving, novel design, convenience in use, easiness in operation, high practicability, high safety in operation and difficulty in damage, and economic benefits are increased.

The invention discloses a high-efficiency steel pipe cleaning device, which includes a bracket, a mixing chamber, a support rod, a forward and reverse motor, an electric telescopic rod A, cleaning claws, and a clamping device; the left end of the bracket is provided with a forward and reverse motor, The output shaft of the rotating motor is fixedly connected with a threaded rod, the threaded rod runs through the left side bracket, and is rotatably connected with the right side bracket, the threaded rod is screwed with a fixed block; the lower end of the fixed block is fixedly connected with an electric telescopic rod A, the electric The lower end of telescopic rod A is provided with a cleaning claw, which includes electric telescopic rod B, connecting rod, rotating motor, ring claw, two-way switch, gear, electromagnet, pressing rod, sleeve, fixed rod, annular card slot, arc Groove, counterweight, semi-ring gear; a clamping device is arranged below the cleaning claw, and the clamping device is composed of symmetrically arranged placement slots A and placement slots B. The invention has the advantages of simple structure, convenient operation, increased cleaning efficiency of the steel pipe and good cleaning effect.

The invention discloses a large-section tunnel supporting system penetrating through a huge karst cave hall and a construction method thereof. The supporting system comprises a plurality of steps anda tunnel base which are sequentially excavated downwards along the top of a karst cave hall backfill body, primary supports are sequentially constructed on all the steps, and the primary supports of all the steps and the tunnel base are integrally closed to form a ring; a karst cave top reinforcing body is arranged on a rock mass at the top of the first step, multiple grouting pipes are pre-buriedin the rock wall at the top of the first step in the line direction, and expanded arch springing is arranged at the bottom of the primary support of the first step; forepoling, steel floral tubes andprimary supports are arranged in excavation side walls of other steps except the first step, the forepoling and the steel floral tubes are completely located in the backfill body, and the forepolingand the steel floral tubes are not connected with the corresponding primary supports; and the tunnel base is provided with grouting steel pipe piles and reserved grouting holes.

The invention provides a welding method aiming at the butt welding of small caliber resistances. The method is applicable to the welding of small caliber steel pipes, wire rods and rings, and also applicable to the contact butt welding of small caliber nonferrous metals such as aluminium and magnesium wire rods and pipe products, belonging to the welding technical field. As stainless steel is slow in heat dissipation, the invention proposes a welding technique with intermittent heating and continuous and uneven heat dissipation. The high temperature plastic zone in the welding temperature field obtained by the process is narrow and can be less affected by the contact resistances; the welding shrinkage can be controlled accurately by the process; the welding line moulding has a beautiful appearance; the strength and the through-hole both meet the requirements, thus greatly improving the qualification rate of products.

The invention discloses a communication pole tower with a steel tube pile as foundation and aims to provide the communication pole tower which is reasonable in structure, capable of achieving quick piling and fixing and mounting, good in stability and convenient and fast to replace and detach. The communication pole tower comprises a tower body and the steel pile extending into the ground. The bottom of the tower body is provided with a tower bottom flange. The top of the steel pile is provided with a pile top flange. The tower bottom flange is connected with the pile top flange through a connection piece. The pile top flange is provided with a plurality of reserved lower wiring holes allowing cables to pass. The outer wall of the steel pile is provided with a plurality of reserved grounding ends. The pile top flange is provided with a plurality of reinforcement connection pieces. The bottom of the outer side of the tower body is provided with a concrete-encapsulated tower foot. The pile top flange and the reinforcement connection pieces are all located in the concrete-encapsulated tower foot and connected with the concrete-encapsulated tower foot. The communication pole tower has the beneficial effects that the communication pole tower can be mounted quickly, the construction period is short, the structural strength is guaranteed, and disassembly and assembly are convenient in the maintenance and replacement processes; and the steel pile can be reserved, and the tower body can be replaced directly very conveniently and fast.

The invention provides a monitoring system for a water injection state of each layer of a multi-layer water injection well. The system comprises a ground control main machine and a sleeve, wherein a carrier steel pipe cable, cable passing packers and multiple underground water distribution devices are arranged in an inner cavity of the sleeve; the multiple underground water distribution devices are connected with the carrier steel pipe cable and an oil pipe in the sleeve; each underground water distribution device is corresponding to one distribution stratum, and is used for acquiring injection state data of the corresponding distribution stratum in real time; the cable passing packers are connected with the oil pipe, and are packed at the two ends of each underground water distribution device, so that a sealed water injection cavity is formed at each place where an underground water distribution device is situated; the carrier steel pipe cable is used for transmitting the injection state data of each distribution stratum acquired by each underground water distribution device to the ground control main machine in real time; and the ground control main machine is used for storing the injection state data of each distribution stratum. The system can monitor the injection state data of the water injection well in real time for a long time, and prevents the scene monitoring.

The invention discloses a pipe fitting clamping device. The pipe fitting clamping device comprises a magnetic ring, a sensor, a tensioning motor, a main controller, a motor driver, a core shaft, an expansion block mounting seat, an expansion block mechanism, a tension spring, a rack, a lead screw, a first switch and a second switch; a body of the tensioning motor and the expansion block mounting seat are fixedly connected to the rack, and an output shaft of the tensioning motor is in transmission connection with the lead screw; the core shaft is slidably connected to the expansion block mounting seat, and the lead screw and the core shaft are in threaded connection; the expansion block mechanism comprises a plurality of radial sliding blocks and a plurality of expansion blocks, the radialsliding blocks are slidably connected into sliding grooves of the expansion block mounting seat, and the conical faces of the radial sliding blocks are matched with a cone part of the core shaft; themagnetic ring is fixedly connected to the output shaft of the tensioning motor; the sensor is fixedly connected to the body of the tensioning motor; the sensor, the motor driver, the first switch andthe second switch are all electrically connected with the main controller; and the tensioning motor is electrically connected with the motor driver. The pipe fitting clamping device can automaticallyclamp a steel pipe, and clamping force can be automatically controlled.

The invention discloses a jacking pipe cutting protective structure for building remains and a construction method thereof. The protective structure comprises an earthwork foundation, a migration body, a box-shaped protective system and a hoisting base, and the box-shaped protective system comprises steel plate protective barrels and protective barrel keels; and the hoisting base comprises steel pipe curtains and opening locking steel beams, the opening locking steel beams and the steel pipe curtains are connected to form a whole, and the hoisting base is provided with hanging point structuresfor allowing hoisting ropes to be connected. The construction method of the protective structure comprises the steps of layered excavation of earthwork, pre-reinforcing of the migration body, lateralreinforcing, earthwork foundation construction, surrounding basement treatment, erection of a jack jacking pipe device, jacking trying, steel pipe marching, butting-joint of steel pipes, jacking andpenetrating through of a soil body, connection of the steel pipes and the opening locking steel beams, hoisting point setting, hoisting and the like. According to the jacking pipe cutting protective structure for the building remains and the construction method thereof, site arrangement is easy, the construction progress is quick, interference factors are less, civilized construction is facilitated, various resources can be well utilized, it can be ensured that surrounding existing facilities are intact, and safety of lives and property of residents is ensured.

The invention discloses a steel pipe with bell and spigot joints. The steel pipe comprises a basal steel pipe, wherein the basal steel pipe is a cylindrical pipe having a spiral welded junction and formed by spirally rolling, welding and fixedly connecting steel plates. The steel pipe is characterized by further comprising a spigot joint steel pipe and a horn-shaped bell joint; at least two annular grooves for placing sealing rings are formed in the outer surface of the spigot joint steel pipe; the two ends of the spigot joint steel pipe are respectively an inserting end and a welding end; a conical surface in sealing contact with the bell joint is arranged at the outer side of the inserting end of the spigot joint steel pipe; one end of the basal steel pipe is welded and fixedly connected with the welding end of the spigot joint steel pipe; and the other end is welded and fixedly connected with the small end of the horn-shaped bell joint. Connecting structures are as follows: the spigot joint steel pipe of the previous steel pipe is in sealing contact with the conical part of the horn-shaped bell joint of the next steel pipe through the conical surface of the spigot joint; and the spigot joint steel pipe of the previous steel pipe is in sealing contact with the horn-shaped bell joint of the next steel pipe through the sealing ring thereon. The steel pipe has such advantages as simple structure, high sealing reliability, quick mounting, convenience for maintenance and disassembly and long service life.

The invention discloses a two-roll tandem pipe mill and a roll framework locking device thereof. The roll framework locking device comprises a pressing device and a side locking device. Rolls of the roll framework include a first roll and a second roll parallel to each other. After the roll framework is mounted into a main base, the side locking device is used for longitudinally locking the rolls of the roll framework, and the pressing device is used for pressing from the first roll to the second roll of the roll framework. The side locking device comprises a locking cylinder and a pressure-bearing backing plate, wherein the locking cylinder is arranged at the back end of the main base, and an extending end of the locking cylinder is a locking press head, a first bevel is formed on the locking press head, and a second bevel matched with the first bevel to lock the rolls longitudinally is formed on the pressure-bearing backing plate arranged at the back end of the roll framework. By the roll framework locking device, the problem of keeping horizontal rolling balance of the roll framework of the two-roll tandem pipe mill in the prior art is solved, stability of the roll framework in rolling is guaranteed effectively, and steel pipe rolling quality is improved further.

The invention discloses a combined splicing tubular pipe. The combined splicing tubular pipe comprises at least two hollow pile bodies which are sequentially connected with each other, and is characterized by also comprising at least one steel tube body, the steel tube body is a hollow cylinder and sleeved on the outer circumference of the junction of two adjacent hollow pile bodies of the combined splicing tubular pile, the steel tube body is provided with a plurality of plug welding holes, and the steel tube body is connected with the hollow pile bodies through the plug welding holes in a welding manner. The inner side wall of the steel tube body is connected with the tail part of one pile body in a welding manner and then connected with the head of another pile body in a plug welding manner. The pile for the irrigation works is simple in pile splicing operation, high in carrying capacity and strong in bend resistance; the steel tube body is added on the junction of the two pile bodies, so that the carrying capacity of the pile for the irrigation works can be increased; the steel tube body is provided with the plug welding holes, and the steel tube body is connected with the pile bodies in the plug welding manner, so that convenience in welding is achieved, and time and labor are saved.

The invention discloses a horizontal biaxial tension testing machine and a tension testing method thereof. The machine comprises a main body structure (1), the main body structure is a machined large-caliber thick-walled steel tube, the peripheral surface of the main body structure is horizontally uniformly provided with hollow jacks (3), and every hollow jack is fixedly connected with the main body structure through a flange plate (2). Every hollow jack is sequentially connected with a pressure sensor (4), a hexagonal lock cap (5), a pull rod (6) and a combination jig to form a transmission system. The surfaces, connected with the flange plates, of the main body structure are processed planes. The combination jigs are connected to the pull rods and can linearly move with the pull rods. The combination jigs are used to clamp samples. The invention also provides a method for carrying out biaxial tension testing by using the horizontal biaxial tension testing machine. The horizontal biaxial tension testing machine has the advantages of compact structure, simple form, convenience in adjustment, stability in working, achieving of simultaneous and centrically centrosymmetric loading, and various test functions.

The invention discloses a culvert mouth of a corrugated steel pipe culvert. The culvert mouth comprises a main wall plate and side wall plates, wherein the main wall plate and the side wall plates are plane steel plates consisting of corrugated steel plates; reserved thread holes are formed in each plane steel plate; one ends of bar strips are connected with the main wall plate through the reserved thread holes; the other ends of the bar strips are straightened and anchored in compacted soil materials; the main wall plate is perpendicular to the cross section of a culvert body; an opening is formed in the main wall plate; the shape of the opening is matched with that of the culvert; the periphery of the opening is connected with the edge of the culvert wall of the culvert through a flange; each of two outer sides of the main wall plate is connected with one side of the corresponding side wall plate. The culvert mouth of the corrugated steel pipe culvert, disclosed by the invention, solves the problems of cracking, infirm connection, poor beauty degree and the like, caused by the uneven sedimentation of a culvert mouth in a masonry structure and a culvert pipe body; besides, the culvert mouth can be produced in a centralized manner in a factory, and the construction is rapid and convenient.

The invention relates to a device and a method for decreasing columns and reinforcing girders of reinforced concrete members, aiming to realize reinforcement of reinforced concrete girders and removal of columns while meeting requirements of room layout and use functions, and complete strengthening and reinforcing of the reinforced concrete girders by supporting action of the four-leg steel pipe struts rather than that of reinforced concrete columns. Particularly, two four-leg steel pipe struts are arranged on two sides of one reinforced concrete column, steel pipe top beams are supported to the bottoms of the reinforced concrete girders by jacks on the upper portions of the four-leg steel pipe struts, so that load of the reinforced concrete girders is transmitted, and the reinforced concrete columns are replaced. Further, the reinforced concrete columns are removed and formworks are mounted while concrete is poured, so that the purpose of reinforcing the reinforced concrete girders is achieved. The device is easy to manufacture, convenient to install, easy to operate and targeted highly, solves the difficulty in reinforcing the reinforced concrete walls and girders, and has high economic benefit and social benefit.

The invention provides a low-material-consumption and simple-structure erecting structure and erecting method for a top ring beam construction platform of a concrete silo and relates to the technicalfield of concrete silo construction. The erecting method for the top ring beam construction platform of the concrete silo comprises the following steps: pre-burying two layers of steel pipe layers separately consisting of a plurality of horizontally arranged steel pipes at the upper end of a silo wall, putting cantilever scaffold pipes into the steel pipes of the steel pipe layers, and separatelyerecting vertical rod scaffold pipes, cross rod scaffold pipes and diagonal scaffold pipes for support stress components at the cantilever sections, located at the two sides of the silo wall, of the cantilever scaffold pipes. The construction cost can be saved, and the construction cycle can be shortened.

The invention relates to a steel pipe length measuring device which is provided with a discharging table and at least two light transmitting type digital laser sensors for measuring the lengths of steel pipes. The discharging table is installed on the rear of a rack, two dies for containing the steel pipes are arranged below a discharging opening in the front portion of the discharging table, thetwo dies are connected to crank slider mechanisms through shafts, stopping block structures capable of moving left and right are arranged below the dies, two V-shaped groove stopping blocks of the stopping block structures capable of moving left and right are fixedly connected with the light transmitting type digital laser sensors, the crank slider mechanisms drive the dies and the steel pipes tooverturn, the steel pipes fall into V-shaped grooves of the V-shaped groove stopping blocks from the interiors of the dies, and the lengths of the steel pipes are measured through the light transmitting type digital laser sensors; tray structures capable of rising and falling are installed in the middles of the two V-shaped groove stopping blocks of the stopping block structures capable of movingleft and right; and the tray structures capable of rising and falling eject the measured steel pipes out of the V-shaped grooves of the V-shaped groove stopping blocks, and the steel pipes enter a sorting device.

The invention relates to a production method of L80-1 steel-grade oil casings with low cost. The production method is characterized in that chemical components of blanks include, by weight, 0.22-0.32% of C, 0.20-0.35% of Si, 1.30-1.50% of Mn, P smaller than or equal to 0.020%, S smaller than or equal to 0.015%, 0.15-0.30% of Cr and 0.01-0.04% of Al; the production process of the oil casings includes molten iron pretreatment, combined blown converter steelmaking process, LF(ladle furnace) refining, VD (vacuum degasser) vacuum treatment, round continuous casting, blank heating, piercing, continuous rolling, sizing/strength reducing, cooling, sawing, straightening, thermal treatment and flaw detection; the thermal treatment includes preserving heat and water quenching at the temperature of 870 DEG C +/-20 DEG C for 40 minutes, and cooling in air after tempering at the temperature of 690 DEG C+/-20 DEG C and preserving heat for 70 minutes. The production method has the advantages that since the 34MnCr22 steel grade is utilized, material components are reasonable in design, precious metal elements such as Molybdenum are not contained in materials of the casings, and cost is low; in the thermal treatment, water quenching and tempering are utilized, no affection to environment is caused by water quenching, cost is lowered, plasticity of steel is improved greatly on the premise of guaranteeing strength, and impact ductility of steel casings is improved, and thus, the oil casings can meet requirements of API Spec 5CT standards.

The invention relates to a concreted filled steel tube composite pile and a manufacturing device and method thereof. The concreted filled steel tube composite pile comprises a steel tube, a reinforcing tube, a connection unit and concrete, wherein the steel tube is longer in the vertical direction and is internally vertically through; a hollow hole is formed in the reinforcing tube; the reinforcing tube is arranged inside the steel tube; the connection unit comprises a single board arranged on the lower portion of the steel tube and a lateral board upward from the periphery of the single board and can be connected with other piles; the concrete is poured into the space formed by the inner surface of the steel tube, the outer surface of the reinforcing tube and the inner surface of the connection unit; the lower end of the reinforcing tube is fixed to the single board; an open hole is formed in the position, corresponding to the reinforcing tube, of the single board, so that the open hole and the hollow hole of the reinforcing tube are communicated. The connector portion of the composite pile is stable in structure, the bending resistance is greatly enhanced, the structure is simple, manufacturing is easy, and therefore the manufacturing expense is reduced.

The invention provides a device for brushing paint on an inner wall of a steel tube, which consists of a steel tube supporting part for supporting the steel tube to be brushed with paint, a paint injecting part for providing the required paint for the steel tube to be brushed, and a paint recovering device for recovering surplus paint. By adopting the device for brushing paint on the inner wall ofsteel tubes of the invention, the problems that brushing paint on the inner wall of steel tubes has slower speed and difficult operation, paint is difficult to be brushed evenly, brushing quality isdifficult to ensure, construction is inconvenient, construction quality and schedule can not be guaranteed and the like are overcome, thus achieving the effects of convenience and practicality.

The invention relates to a tube-shell type heat exchanger which used the U-shaped cross-helical tube, involving an engine exhaust recycle heat exchanger. For improving the engine exhaust recycle system, accelerating the exhaust cooling and increasing the heat exchange efficiency. The heat exchanger includes the heat exchange tube, shell and the tube board, the heat exchange tube is the U shaped siphon, whose two ends fixed on the same tube board, the heat exchange tube is the stainless steel tube which has the entad raised cross-helical groove on the surface, the cross is the 'X'-shaped, the section shape of the stainless steel pipe is a special flat shape, and the height and width of the section shape in the flat shape heat exchange tube are unlikeness. Because of the application of the cross-helical heat exchange tube, the tube inside and outside produce the turbulent flow, not easy to dirty and increase the heat exchange efficiency. The heat exchanger has a compact structure, is particularly suitable for the exhaust gas recycle coolers of a vehicle engine, reduce the discharge of the nitrogen oxygen compound and enhance the exhaust discharge performance indicators, at the same time, the invention can also be used as the mid cooler of a turbocharger system to improve the engine performance.

The invention discloses a steel pipe cutting machine capable of cutting multiple steel pipes simultaneously. The steel pipe cutting machine comprises a base. A support leg is fixedly connected to oneside of the base. A support plate is fixedly connected to one side of the support leg. A driving device is fixedly connected to the top of the support plate and is matched with a toothed bar. The toothed bar is fixedly connected to the top of an L-shaped support plate. One end of the L-shaped support plate is slidably connected with the inside of a first sliding groove through a first sliding device. Through matched use of a first electric telescopic rod, a movable plate, a fixed limiting plate, a fourth sliding groove, a second electric telescopic rod, a movable limiting plate and a through hole, the cutting machine can achieve the condition that the multiple steel pipes are cut simultaneously, the problem that during cutting of an existing cutting machine, only one steel pipe is cut alone is solved, the problem of too low cutting speed during cutting of a plurality of steel pipes is avoided, in this way, cutting time is saved, and the work progress is quickened.

The invention provides a steel tube sheet winding machine. The steel tube sheet winding machine comprises a machine body, wherein a rotary chuck is arranged at the right end of the machine body; the rotary chuck is driven by a rotary motor at the rear end to rotate; a transverse rail is arranged on the machine body; a sheet placing device is arranged on the transverse rail; the sheet placing device moves on the transverse rail through a motor; a discharge hole of the sheet placing device and the center of the rotary chuck are positioned on the same horizontal plane; a guide roller wheel is arranged between the rotary chuck and the sheet placing device; a lifting gas cylinder is arranged on the bottom of the guide roller wheel; the lifting gas cylinder is used for driving the guide roller wheel to move up and down. A steel tube is clamped and driven by the rotary chuck to rotate, and an aluminum sheet is placed on a rotating steel tube through the sheet placing device to perform sheet winding work, and supporting guide is performed through the guide roller wheel; while being not used, the steel tube sheet winding machine can be withdrawn into the machine body through the lifting gas cylinder, so that equipment damages caused by interferences of the sheet placing device and the guide roller wheel are prevented.

The invention discloses a manufacturing method of a bamboo spring bracket. The manufacturing method of the bamboo spring bracket comprises the following steps of bamboo chip pretreatment, gluing and assembly, molding and demolding. The manufacturing method of the bamboo spring bracket has the advantages that traditional metal and rubber spring materials are replaced, and natural bamboo wood is selected, thereby being capable of improving the environmental protection performance and natural degradability of the product; the bamboo wood is treated by using a high temperature poaching, bleaching,drying and carbonization method to obtain the better water-proof bamboo wood; and a bamboo spring material with better mechanical and elastic properties and shock absorption and noise reduction functions is generated by adopting bamboo chips with different thicknesses and steel tubes with different diameters and using a mode of stacking and gluing of multi-layer bamboo chips. The manufacturing method of the bamboo spring bracket can be applied to automobile cushions or middle plate beds.

The invention relates to the technical field of support structure construction and discloses a construction method of a pile-column integrated structure. The pile-column integrated structure comprisesa cast-in-place pile formed below a foundation and a steel pipe column, wherein the steel pipe column is connected to the cast-in-place pile and extends to the portion above the foundation. The construction method comprises the following steps of S1, construction of a pile hole, wherein the construction position of the pile-column integrated structure on the foundation is measured, and the pile hole is formed in the foundation in a rotary excavating mode; S2, pouring of the cast-in-place pile, wherein a steel reinforcement cage and a guide pipe are placed into the pile hole, and concrete is pumped and poured into the pile hole through the guide pipe; S3, insertion of a steel pipe, wherein the lower end of the steel pipe is inserted into the cast-in-place pile, and a gap between the steelpipe and the pile hole is subjected to backfilling; S4, installation of the steel reinforcement cage in the steel pipe, wherein the steel reinforcement cage is installed in the steel pipe; S5, pouringof the steel pipe column, wherein after the concrete of the cast-in-place pile initially sets, the concrete is poured into the steel pipe, the steel pipe column is formed after the concrete sets, andthe cast-in-place pile and the steel pipe column form the pile-column integrated structure. The pile-column integrated construction structure constructed by means of the method is stable and firm.

The invention discloses a friction rust removal device for the inner wall and the outer wall of a steel pipe. The friction rust removal device comprises a base. A moving cavity is formed in the uppersurface of the base. A motor is fixedly connected to the inside of the left wall of the moving cavity. The right end of the motor is in power connection with a motor shaft with threads, wherein the right end of the motor shaft is rotationally connected to the right wall of the moving cavity. Square shafts which are rotationally connected to the left wall and the right wall of the moving cavity andare symmetric in front-back position are arranged on the front side and the rear side of the motor shaft. The left end of the square shaft on the front side is fixedly connected with a first gear. The rear side of the first gear is in engaged connection with a second gear fixedly connected to the motor shaft. One-time friction rust removal operation on the inner wall and the outer wall of the steel pipe is achieved through switching of inner wall and outer wall clamping and grinding block abutting extrusion, and therefore, the relatively good rust removal efficiency is achieved. The frictionrust removal device is relatively simple in operation of the whole process, convenient to use and low in labor intensity; and friction rust removal is clean and free of pollution, and thus, the friction rust removal device is worthy of popularization.