481 results about "Metal bellows" patented technology

The invention provides an automatic leak detection method and system for a dynamic bending durability test of a metal corrugated pipe, and relates to the technical field of metal corrugated pipe performance tests.The method comprises the steps that a to-be-tested metal corrugated pipe is installed on a test station, and test working condition parameters are set through a PLC; the test working condition parameters comprise a bending motion mode, a load spectrum, an internal pressure type, a pressure value, a temperature condition and a test frequency; according to the bending motion mode and the load spectrum, a multi-degree-of-freedom bending motion mechanism is driven to apply a dynamic bending load to the metal corrugated pipe; and when the dynamic bending load is applied, internal pressure is applied to the interior of the metal corrugated pipe according to the internal pressure type and the pressure value, and a temperature environment is synchronously applied, so that a multi-factor coupling load is formed. According to the invention, on the basis of working condition setting, through multi-source data acquisition, correction and fusion determination, an automatic closed loop of test execution, abnormity alarm, helium detection quantification and report generation is realized.

The utility model relates to the technical field of inflatable hoses, in particular to a high-performance wear-resistant extremely-cold-resistant inflatable hose. The inflation hose comprises a metal corrugated pipe, the metal corrugated pipe is sleeved with a steel wire mesh sleeve, the steel wire mesh sleeve is sleeved with a long connecting pipe, the long connecting pipe is sleeved with a vulcanization layer, one end of the metal corrugated pipe is connected with a long inner cone connecting nozzle in an inserted mode, and the outer surface of the long inner cone connecting nozzle is sleeved with a nut in a threaded mode. And a long outer cone connecting nozzle is inserted into the other end of the steel wire mesh sleeve. The inflatable hose can meet the requirement of a dew point of-65 DEG C by adopting a metal corrugated pipe structure, can meet the requirements of 40MPa working pressure and 120MPa bursting pressure structure by adopting a steel wire mesh sleeve structure and adopting a high-pressure brazing form after double-layer weaving, and meanwhile, the vulcanization layer is arranged outside the long connecting pipe in a sleeving manner, so that the service life of the long connecting pipe is prolonged. Therefore, the inflatable hose has excellent oxidation resistance, ozone resistance and erosion resistance.

The invention relates to the technical field of generator exhaust, and discloses a generator outlet exhaust pipe structure which comprises a connector and a vertical exhaust pipe, the bottom end of the connector is directly connected with the air outlet end of a generator, and the connector and the vertical exhaust pipe are connected through a metal bellow expansion joint. A vibration reduction component is arranged on the outer wall of the vertical exhaust pipe, and a temperature control component is arranged in the vertical exhaust pipe; the vibration reduction component comprises a fixed frame and a sliding frame, the fixed frame is connected with a wall and other fixed structures, thick springs and thin springs are used for forming a composite vibration reduction spring structure, and when the vertical exhaust pipe is subjected to low-frequency vibration, the displacement of the exhaust pipe is small, and at the moment, only the thin springs deform; when the vibration frequency rises and the displacement amount is too large, the thick spring starts to be connected with the thin spring in parallel for bearing, the variable stiffness characteristic is formed, the good vibration reduction effect is achieved, and meanwhile the damper works to absorb kinetic energy of vibration.

The invention relates to the technical field of metal corrugated pipe machining and forming, and provides a forming device for corrugated pipe machining. The annular mounting frame is arranged at the discharging end of the device body and provided with an annular guide rail, and the annular guide rail coincides with the axis of the metal corrugated pipe. The plurality of clamps are arranged on the annular guide rail in a sliding manner at intervals in the circumferential direction; and the first rolling wheels are rotationally arranged at the other end of the clamp and used for being in rolling abutting connection with the metal corrugated pipe. According to the technical scheme, the problem that in the prior art, when a formed metal corrugated pipe is cut, a clamp continuously extrudes the metal corrugated pipe from the two sides, and part of the area of the metal corrugated pipe is prone to being extruded and deformed is solved.

The invention relates to the technical field of aerospace, in particular to a metallic diaphragm type low-temperature pressure accumulator for a carrier rocket, which comprises a pressure accumulator shell, the pressure accumulator shell comprises a multi-way and a plurality of sealing shells, the multi-way is provided with a plurality of interfaces, and the sealing shells are arranged in the multi-way. Any two opposite connectors in the multiple connectors are an inlet and an outlet used for being connected with a carrier rocket low-temperature propellant conveying pipeline, the sealing shells are arranged at the other connectors in the multiple connectors correspondingly, and a pressure adjusting cavity is formed in the inner space of each sealing shell. The metal film box assembly is arranged in the pressure regulating cavity; and the pressure regulating assembly is communicated with the metal film box assembly and is used for regulating the internal pressure of the metal film box assembly. The low-temperature pressure accumulator has the effects that the stability and reliability of the low-temperature pressure accumulator are improved, and vibration suppression requirements under different conditions are met.

The present invention relates to the technical field of bellows detection, and discloses a vertical metal bellows bending anti-leakage performance test device, comprising a base plate, the upper surface of the base plate is fixedly connected to a pillar, the top of the pillar is fixedly connected to a top plate, the front side of the pillar is fixedly connected to a mounting plate, the front side of the mounting plate is rotatably connected to a ball screw, and the upper surface of the base plate is fixedly connected to a guide rod. In the present invention, a positioning half-hoop and a fixed circular plate clamp the flange at one end of the bellows, thereby improving the clamping stability of the device on the bellows, thereby improving the detection stability and effect, the arc block is squeezed by the resistance of the bellows to squeeze the limit plate, and the limit plate then squeezes the spring sheet, thereby facilitating the insertion of the bellows into the positioning half-hoop, thereby improving the convenience of use, and the elasticity of the nylon belt and the spring sheet drives the limit plate and the arc block to reset and clamp the bellows, thereby further improving the clamping stability.

The utility model relates to the technical field of metal corrugated pipes, and discloses a cutting device for metal corrugated pipe machining, which comprises a support frame, a sliding rail is fixedly connected to the middle of the support frame, a sliding rod is mounted in the sliding rail through a lead screw, and a circular jacket is fixedly connected to the inner side of the sliding rod. A first threaded rod is installed in the supporting frame, the first threaded rod is sleeved with a first threaded sleeve in a threaded mode, a positioning clamping plate is fixedly connected to the inner side of the first threaded sleeve, a metal corrugated pipe is clamped to the inner side of the positioning clamping plate, and a clamping plate positioning rod is fixedly connected to the side face of the positioning clamping plate. According to the cutting device for metal corrugated pipe machining, the position of the cutter is adjusted, the first motor is started at the same time, the first motor drives the angle of the circular support to be adjusted, meanwhile, the circular support can conduct circumferential cutting treatment on the outer portion of the metal corrugated pipe, and the efficiency of cutting the outer portion of the metal corrugated pipe is improved.

The invention relates to the field of corrugated pipe drilling, in particular to metal corrugated pipe drilling equipment which comprises two fixing mechanisms arranged in a bilateral symmetry mode and a guide rod fixedly connected between the two fixing mechanisms. A driving mechanism for driving the movable mechanism to move and operate is installed on the front face of the movable mechanism, and a pressing mechanism and a drilling mechanism are evenly distributed on the left side of the movable mechanism in the circumferential direction. A single power source drives a second motor to drive a reciprocating moving assembly and an intermittent moving assembly to operate, the second driving motor drives a moving gear to intermittently rotate through a stirring disc and a grooved wheel, and a moving mechanism can be driven to intermittently move rightwards at equal intervals; and meanwhile, a second driving motor can drive a driving gear to rotate forwards and backwards by driving a reciprocating movement assembly to reciprocate, so that a movable mechanism can drive a pressing mechanism and a drilling mechanism to be close to the metal corrugated pipe for fixing and drilling, the drilling efficiency is improved, and the production cost is reduced.

The utility model discloses a metal bellows processing stopper, including three spacing rings and bending box, the top of bending box is connected with the two corresponding spacing rings, the inside of bending box is provided with a rotating disk, one side of the rotating disk is fixedly connected with an adjusting box, the top of the adjusting box is connected with a moving block in a sliding and interpenetrating manner, and the moving block is connected with the rotating disk. The tops of the moving blocks are connected with the corresponding limiting rings, and a bending mechanism is arranged in the bending box. The bending mechanism comprises a supporting column fixedly connected to the inner wall of the bottom of the bending box, and the supporting column rotationally extends into the rotating disc. According to the limiting stopper for metal corrugated pipe machining, the bending mechanism can drive the single limiting ring to rotate, so that the single limiting ring and the other two limiting rings form an included angle to bend a metal corrugated pipe, and bending machining of the metal corrugated pipe is facilitated.

Metal bellows coupling with at least two compensating elements arranged opposite each other, with at least one cylindrical hollow body arranged between the compensating elements, in particular in the form of at least one flange or in particular in the form of at least one tube, and with at least one sensor device or sensor assembly arranged inside the hollow body.

The invention discloses a water-based expansion liquid and a hydraulic expansion processing method of a metal corrugated pipe. The water-based expansion liquid comprises 8-15% of emulsified oil, 1-3% of an antirust agent, 2-4% of a viscosity modifier and the balance of a solvent, the antirust agent is prepared from comonomers through free radical copolymerization, and the comonomers comprise unsaturated carboxylic acid monomers, allyl imidazole and siloxane monomers with alkenyl in a mass ratio of (30-50): (15-45): (5-15). The water-based expansion liquid can guarantee the anti-rust performance of the metal corrugated pipe in the machining process, and the product reject ratio of a water-based hydraulic expansion process is reduced.

In order to overcome disadvantages and inadequacies of a metal bellows coupling of the type in question, at least two compensation elements (20) disposed opposite one another, at least one cylindrical hollow element (30) disposed between the compensation elements (20), in particular in the manner of at least one tube (30a) or in particular in the manner of at least one flange (30b), and at least one sensor device or sensor assembly (40) disposed within the hollow element (30) are proposed.

The invention provides a metal corrugated pipe concave type forming device and method, and relates to the technical field of metal pipe non-cutting machining, and the metal corrugated pipe concave type forming method comprises the steps that a servo driving mechanism drives a first core mold to expand to the designed diameter in the radial direction, and the first core mold is pushed to move in the axial direction to be folded with a second core mold; the upper die and the lower die are driven by the first hydraulic cylinder to get close to each other for die assembly; a liquid medium is injected into the sealing cavity through the hydraulic assembly; the first hydraulic cylinder drives the upper die and the lower die to move away from each other; a servo driving mechanism drives a first core mold to radially contract and axially move, and a second hydraulic cylinder synchronously drives a second core mold to push formed corrugations; the servo driving mechanism drives the first core mold to axially move in the direction close to the second core mold for resetting, and the second hydraulic cylinder drives the second core mold to reset. The first core mold and the second core mold are adopted to move cooperatively for feeding, full-automatic continuous machining of the metal corrugated pipe is achieved, and the forming efficiency is remarkably improved.

The utility model discloses metal corrugated pipe manufacturing equipment which comprises a plurality of stamping parts, a plurality of stamping dies and an adjusting mechanism used for adjusting the pipe blank feeding amount, the stamping parts are annularly distributed on the inner side of a pipe blank, the stamping dies are annularly distributed on the outer side of the pipe blank, and the adjusting mechanism is used for adjusting the pipe blank feeding amount. And the stamping part and / or the stamping die can do internal and external telescopic motion. A manufacturing method of a metal corrugated pipe comprises a corrugation forming procedure, specifically, stamping parts synchronously extend outwards and / or stamping dies synchronously contract inwards, so that a corrugation is formed on a pipe blank; all the stamping parts synchronously contract inwards to reset and / or all the stamping dies synchronously extend outwards to reset, and the adjusting mechanism drives the pipe blank to ascend or descend by a set distance; or, the adjusting mechanism drives the stamping part and the stamping die to ascend or descend by a set distance, and preparation is made for forming the next corrugation. The device has the advantages of adaptability to various specifications, simplicity in operation, short processing time and the like.

The utility model discloses an adjustable pipeline assembly connecting piece which comprises four semicircular pipes, every two semicircular pipes form a group, lug plates are symmetrically and fixedly installed on the two sides of each semicircular pipe, a fixing bolt is installed between the two lug plates on the same side, a metal corrugated pipe is installed between the two groups of semicircular pipes, and the metal corrugated pipe is connected with the two groups of semicircular pipes. The metal corrugated pipe is extruded and driven to be compressed by oppositely moving the round pipe composed of the two semicircular pipes, the round pipe composed of the two semicircular pipes is placed between the two pipelines, then the round pipe composed of the two semicircular pipes is pulled, the fixing ring abuts against the elastic sealing ring, and the metal corrugated pipe is compressed through the elastic sealing ring. And then the two semicircular pipes are installed and fixed through the fixing bolts, so that the two pipelines can be conveniently assembled, the two pipelines to be installed do not need to be adjusted, installation operation is easy and convenient, the two semicircular pipes can be controlled to be installed between the two pipelines with different distances by adjusting the compression degree of the metal corrugated pipe, and practicability is high.

This pressure-applying mechanism for an all-solid-state battery comprises: an all-solid-state battery cell disposed inside a fluid chamber filled with a fluid; and a pressure-applying part that has the fluid chamber and applies a predetermined pressure to the all-solid-state battery cell via the fluid. The fluid may be oil. The predetermined pressure may be generated by applying pressure to the fluid chamber. The pressure-applying part may include an upper shell member, a lower shell member, and a metal bellows disposed in a space formed by the upper shell member and the lower shell member.

The utility model discloses a metal bellows coupling which comprises a metal bellows body, a connecting mechanism and a shaft sleeve mechanism, when a transmission shaft is installed, the transmission shaft is sleeved in a sleeving ring, a diaphragm on a connecting ring is broken to be sleeved in a glue groove, glue in the glue groove overflows, and the glue overflows between the transmission shaft and the connecting ring and between the transmission shaft and the sleeving ring. The transmission shaft is bonded with the connecting ring and the sleeving ring, so that connection of the coupling and a shaft is more convenient, glue is easy to contact with air through the through groove, and solidification of the glue is accelerated; the bolt is screwed off to detach the shaft sleeve mechanism connected with the transmission shaft from the connecting mechanism when the transmission shaft needs to be detached; the driving shaft can be connected with the other transmission shaft by installing a new shaft sleeve mechanism on the connecting mechanism, when the metal corrugated pipe body needs to be replaced, only the metal corrugated pipe body between the shaft sleeve mechanisms and the cold connecting mechanism need to be replaced, and the device is more convenient to maintain and replace through the modular design.

The invention relates to the technical field of thermal control of spaceflight electronic equipment, and discloses a heat dissipation device based on a corrugated pipe liquid metal unit array and a manufacturing process, and the heat dissipation device comprises a plurality of metal corrugated pipe units, a radiator substrate located at the tops of the metal corrugated pipe units, and a unit bottom plate located at the bottoms of the metal corrugated pipe units; the number and the positions of the metal corrugated pipe units are matched with those of components on the component substrate, and each metal corrugated pipe unit comprises one or more metal corrugated pipes; one side of the metal corrugated pipe is in sealed connection with the radiator substrate, and the other side of the metal corrugated pipe is in sealed connection with the unit bottom plate; the metal corrugated pipe is filled with liquid metal and used for transferring heat. According to the invention, through independent elastic deformation of the metal corrugated pipe units, the height difference of electronic components below is compensated in a self-adaptive manner, pressure control and efficient heat conduction are realized, and the problems existing in the heat dissipation design of the spacecraft electronics box are solved.

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

The invention relates to the field of metal corrugated pipe leakage detection, and discloses a fixing device for metal corrugated pipe leakage detection and a helium mass spectrum leakage detection system, and the fixing device comprises a first device body and a second device body which are opposite to each other in a first direction and are arranged in a spaced manner to form an assembly space, a first communication hole is formed in at least one of the first device body and the second device body; the adjusting mechanism is used for adjusting the spacing distance between the first device body and the second device body in the first direction so as to change the size of the assembly space in the first direction. Therefore, through cooperation of the first device body, the second device body and the adjusting mechanism, the size of the assembling space in the first direction can be changed, metal corrugated pipes of different length sizes can be assembled in the assembling space, and therefore the universality of the fixing device can be improved, and the fixing device is simple in structure and convenient to use. And the assembly efficiency of the fixing device is improved, so that the leak detection efficiency of the metal corrugated pipe is improved.

The invention discloses a multi-parameter intelligent detection device and detection method suitable for a metal corrugated pipe, and relates to the technical field of metal corrugated pipe detection. A clamping mechanism is used for clamping a to-be-detected metal corrugated pipe and can fill gas with certain pressure into the to-be-detected metal corrugated pipe; the visual detection mechanism is used for detecting appearance characteristics and weld quality of the metal bellows, the air tightness detection mechanism is used for detecting air tightness of the metal bellows, and the geometric dimension detection mechanism is used for detecting dimension errors of the metal bellows. The visual detection mechanism, the air tightness detection mechanism and the geometric dimension detection mechanism can rotate relative to the clamping mechanism, and the rotary table mechanism, the visual detection mechanism, the air tightness detection mechanism and the geometric dimension detection mechanism are electrically connected with the console. Based on the multi-source data acquisition technology, the integration level of the detection function is improved, the labor intensity of quality inspection personnel is reduced, the detection efficiency is improved, and meanwhile damage caused by repeated disassembly and assembly of the metal corrugated pipe is avoided.

The invention discloses a variable-center-distance double-spindle main transmission mechanism, and relates to the technical field of numerical control machine tools. The fixed main shaft and the distance adjusting main shaft are arranged at the bottom of the box body, and the distance between the two main shafts is adjustable; gear transmission assemblies are arranged in the transmission cavity of the box body, a transition gear and a follow-up gear are adopted to keep the meshing transmission relation between the gear transmission assemblies in the center distance adjusting process, and in the center distance adjusting process, the leakproofness of the transmission cavity is continuously kept. The screw rod driving module drives the distance adjusting main shaft to move and is matched with a gear transmission structure, flexible adjustment of the center distance of the double main shafts is achieved, repeated disassembly, assembly and adjustment are not needed, time and labor are saved, and various machining requirements are met; the closed transmission cavity is formed by the metal corrugated pipe and the fixing ring, external scraps, cooling liquid and other pollutants are effectively prevented from entering, a gear transmission system is protected, the overall structure is compact and reliable, the transmission path is clear, and the device is suitable for the numerical control machine tool with the high precision and high reliability requirements.

The application belongs to the technical field of water quality filtering of heat exchange equipment, and particularly relates to a filtering device and method for water quality of wave disturbance flow cooling heat exchange equipment, which comprises a primary filtering tank with supporting feet, a primary filtering mechanism is arranged in the primary filtering tank, a backwashing filter is arranged below the primary filtering tank, an aggregation mechanism is arranged between the primary filtering tank and the backwashing filter, and a sterilization mechanism is arranged at the output end of the backwashing filter. The filtering device and method for water quality of wave disturbance flow cooling heat exchange equipment, through the booster pump for pressurizing the spray water entering the metal bellows, the instantaneous high-pressure water flow impacting the metal bellows can generate a longitudinal wave and compression, and then the micro-particles can be compressed into groups, and the two groups of reset ropes relatively reset the metal bellows, so that the spray water and the particles in the water are pushed forward to flow into the backwashing filter, so that the water flow passes through the filtering medium to filter out the solid particles and suspended matters in the water, thereby reducing the operation cost.

The utility model relates to the technical field of flat pipe machine, concretely to a flat pipe machine for metal bellows production and processing, the utility model discloses a workbench, the inner wall one side of workbench is provided with cleaning assembly, the other end of workbench is provided with cutting assembly, the inner wall rotationally connected of workbench has extruding roller, the front of workbench is provided with gear, gear and extruding roller are fixed, the front fixed connection of gear has pulley, the gear is engaged each other up and down, by setting cleaning assembly, when cleaning to metal bellows, metal bellows is placed to extruding roller between by the worker passing through the circular ring on installation rod, then by the first motor drive extruding roller makes metal bellows move forward, the brush on the installation ring contacts metal bellows to clean the small stone on its surface, and then as far as possible reach the effect that avoid the influence of small stone leading to the surface damage of metal bellows and the service life of extruding roller.

The utility model belongs to the technical field of metal corrugated oil conservators for transformers, and particularly relates to an internal oil type metal corrugated oil conservator with a pointer type oil level indicator, which comprises a conservator cover, a conservator seat, an expansion core, the pointer type oil level indicator and a transmission and detection component. The expansion core body expands and contracts up and down in the cabinet cover, the pointer type oil level gauge is installed on the cabinet cover, the up-and-down movement of the expansion core body is converted into rotation of an oil level gauge pointer through the transmission and detection assembly, oil level information is transmitted to a remote control terminal, and the functions of remotely monitoring the oil level height and giving an alarm when the oil level is too high or too low are achieved. The oil level indicating device is visual and accurate in oil level indication, convenient and fast in reading, smooth and reliable in transmission and detection assembly operation, free of clamping stagnation, high in universality, free of limitation of sealing performance, capable of achieving remote monitoring and capable of saving manpower and material resources.

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

The present invention discloses a production line for metal bellows and the metal bellows produced by the same, and relates to the technical field of metal bellows production. A production line for metal bellows includes a bottom plate, the upper end of which is fixedly connected to two side plates, the upper ends of the two side plates are fixedly connected to the same top plate, a hydraulic cylinder is installed on the upper end of the top plate, the telescopic end of the hydraulic cylinder penetrates downwardly through the top plate and is fixedly connected to a cross bar, and both side plates are provided with a forming mechanism connected to the cross bar; a metal bellows includes a bellows body, both ends of the bellows body are provided with connecting ends, the outer wall of the connecting end is provided with two annular flanges, and a sealing ring is provided between the two annular flanges. The present invention makes the connection of the metal bellows simple, fast, and low in cost, and can realize the automatic and continuous loading, forming, and discharging of the metal bellows, with high processing efficiency.

The utility model relates to the technical field of urea solution denitration, in particular to an incineration tail gas denitration auxiliary device. The incineration tail gas denitration auxiliary device comprises a liquid storage cylinder, a plurality of metal corrugated pipes which are annularly distributed are installed on the liquid storage cylinder, and a plurality of atomization nozzles are installed on the metal corrugated pipes. The bottom of the liquid storage cylinder is provided with an adjusting component used for adjusting the spraying angle of the atomizing nozzle. According to the incineration tail gas denitration auxiliary device provided by the utility model, the design of the annularly distributed metal corrugated pipes and the multi-angle atomizing nozzles is adopted, and the diversion branch pipes are matched, so that the vertical and horizontal two-way coverage of urea solution in the flue is realized, the mixing efficiency of the urea solution and flue gas is obviously improved, the denitration blind area is reduced, and the denitration efficiency is improved. And the angle of the atomizing nozzle on the metal corrugated pipe is adjusted through the adjusting component, so that the spraying range is expanded, and the denitration requirements under different working conditions are met.

The present invention relates to a composite-concrete-steel double-wall hollow pipe column assembled node, comprising a prefabricated column, a reinforced concrete foundation / cap beam, and a high-strength non-shrinkage mortar layer; the prefabricated column comprises a composite pipe, a steel pipe, and a concrete layer, the composite pipe is sleeved outside the steel pipe, the space between the composite pipe and the steel pipe is filled with concrete to form a concrete layer, and one end of the steel pipe extends from one end of the composite pipe; a metal bellows is embedded in the reinforced concrete foundation / cap beam; the end of the steel pipe extending from the composite pipe is inserted into the metal bellows, and high-strength non-shrinkage mortar is poured between the metal bellows and the steel pipe to form a high-strength non-shrinkage mortar layer. The present invention also relates to a construction method for a composite-concrete-steel double-wall hollow pipe column assembled node. The present invention has the advantages of a clear force transmission path, good ductility, high integrity, excellent seismic performance, and controllable node quality, and belongs to the technical field of combined structure assembled buildings.

The invention discloses a roadway support device with an energy-absorbing buffer device, which comprises a support top beam, a support column and an energy-absorbing buffer device, and the energy-absorbing buffer device comprises a hydraulic buffer unit and a metal yield buffer unit; the hydraulic buffer unit is fixedly connected with the metal yield buffer unit; the hydraulic buffer unit comprises a cylinder body, a piston rod and a damping hole, and the metal yield buffer unit is a metal corrugated pipe which is axially compressed and deformed. Compared with the prior art, the hydraulic buffer unit has the advantages that the hydraulic buffer unit can quickly dissipate high-frequency impact energy and effectively cope with instantaneous strong impact by virtue of the cooperation of the damping hole with the variable-diameter design, the energy accumulator and the safety valve; the metal yield buffer unit adopts a metal corrugated pipe which is axially compressed and deformed, residual energy is absorbed through plastic deformation under the limit load, the metal corrugated pipe and the metal yield buffer unit are in two-stage linkage, impact energy levels with different strengths can be covered, the energy absorption efficiency is greatly improved, and the limitation of a single energy absorption mechanism is avoided.