3374 results about "Pipe support" patented technology

A support includes a base and a support structure secured to the base. The support structure is adapted to support a plurality of horizontally extending elongated items. A retainer may be positioned over the elongated items to thereby prevent removal of the elongated items from the support structure. The retainer may be movable to an open position to permit removal of the elongated items.

The invention discloses a multistage adjustable pipe support bracket based on petroleum pipeline installation. The multistage adjustable pipe support bracket comprises a first pipeline, a second pipeline is arranged on one side of the first pipeline, an installation frame is arranged at the bottom of the first pipeline, a presumption mechanism is arranged on one side of the installation frame, and a limiting and clamping mechanism is arranged on the top of the installation frame; when the petroleum pipeline is installed, one section of pipeline is stabilized firstly, then the other section of pipeline is placed on the movable lifting frame, the lifting frame is synchronously adjusted according to the height of the limiting frame, the position of the lifting frame is limited through clamping plates on the two sides of a connector, it is guaranteed that the two sections of pipelines can be attached completely and correspond to each other, and the installation efficiency is improved; and meanwhile, clamping and pushing plates are arranged on the two sides of the pipeline on the movable side, the pipeline is pushed and driven, the pipeline can be conveniently pushed to be close to the other pipeline, clamping plates on the two sides of the connectors are evacuated, the two connectors can be tightly attached, and the fixing structure of the connectors can be conveniently installed.

The invention discloses a thin-wall seamless steel pipe precision straightening device and method, and particularly relates to the technical field of steel pipe straightening, the thin-wall seamless steel pipe precision straightening device comprises a straightening workbench, a concave sliding groove is formed in one side of the outer end of the straightening workbench, a bottom supporting plate is arranged at the lower end of the straightening workbench, and a supporting cross rod is arranged in the middle of the upper end of the bottom supporting plate; a fixed supporting block and a bottom straightening supporting block are arranged on one side of the upper end of the straightening workbench. In actual use, under the corresponding arrangement state of the supporting sliding blocks, the small motors, the two-way lead screws, the pipeline supporting blocks and the supporting sliding grooves, the distance between the pipeline supporting blocks can be adjusted through the small motors, so that thin-wall steel pipes with different diameters can be conveniently supported, meanwhile, the moving stability of the pipeline supporting blocks can be improved, and the practicability is high. And meanwhile, in the corresponding arrangement state of a second electric telescopic rod, an adjusting supporting plate, an adjusting rolling wheel and a concave adjusting groove, the adjusting supporting plate can be driven to ascend and descend through the second electric telescopic rod.

The invention belongs to the technical field of water conservancy projects, and particularly relates to a supporting structure for pipeline installation for water conservancy projects and a using method thereof.The supporting structure for pipeline installation for water conservancy projects comprises a base, two moving seats are slidably arranged at the top of the base, and pipe supports are fixed to the top ends of the two moving seats and used for lifting a pipeline; four connecting arms are arranged in the two pipe supports in a sliding and penetrating manner, and the four connecting arms are used for clamping and fixing a pipeline; according to the pipeline supporting device, through cooperation of the pipe support, the connecting arm and the second supporting plate, the middle and the butt-joint end of a pipeline can be lifted, the stability of the pipeline is greatly improved, and when one end of the pipeline is inserted into the rotating ring, through rotation of the rotating ring, the pipeline can be supported by the first supporting plate; and the outer wall and the end of the pipeline can be cleaned by driving the cleaning brush plate and the cylindrical steel brush.

The invention discloses a low-energy-consumption integral cold insulation pipe bracket steel hoop machining jig, and belongs to the technical field of metal machining dies. Comprising an upper die base, and a stamping part is inserted into the middle of the upper die base; comprising a lower die base, a stamping concave base is fixedly connected to one side of the lower die base, a frame selection assembly used for limiting a steel billet is arranged outside the stamping concave base, the stamping concave base and the impact corner of a variable-diameter convex ring are chamfered, two notch grooves are formed in the outer portions of the stamping concave base and the variable-diameter convex ring in a symmetrical structure, and transmission rollers are rotationally connected into the notch grooves; through holes are formed in the middle of the stamping concave base and the middle of the variable-diameter convex ring, and elastic material pushing pieces are fixedly connected into the through holes. By arranging the stamping part with the variable-diameter convex rings with different diameters, the use efficiency of the die is remarkably improved.

The utility model relates to production equipment for spraying and winding a thermal insulation pipe. The production equipment comprises a rack, a pipeline supporting assembly, a pipeline conveying assembly and a pipeline cutting assembly, the pipeline supporting assembly is used for supporting the heat preservation pipe and comprises at least two electric rollers, and the two electric rollers are arranged in a spaced mode and supported on the two sides of the heat preservation pipe correspondingly. The pipeline conveying assembly is used for conveying heat preservation pipes and comprises a supporting plate, the supporting plate is horizontally arranged between the two electric rollers, and a plurality of conveying driving mechanisms are arranged on the lower side of the supporting plate. Each conveying driving mechanism comprises a crank, a connecting rod and second driving equipment, the crank is rotationally mounted on the rack, one end of the connecting rod is hinged to the crank, and the connecting position deviates from the rotation center of the crank; the other end of the connecting rod is fixedly connected with the supporting plate; the second driving device is in transmission connection with the crank and drives the crank to rotate around the rotation center of the crank. The pipeline cutting assembly is used for cutting off the heat preservation pipe. Conveying of the heat preservation pipe is achieved, abrasion is not prone to occurring, and the stability of equipment is ensured.

The invention relates to the technical field of grinding equipment, in particular to a stainless steel pipe surface grinding device for communication tower machining, which comprises a base, a pipeline supporting and rotating mechanism, a sliding seat and a grinding mechanism, and is characterized in that the pipeline supporting and rotating mechanism is arranged on one side of the top surface of the base and is used for supporting a pipeline to be flatly placed and controlling the pipeline to rotate around the central axis of the pipeline; the sliding base is slidably arranged on the top face of the base, and a supporting table capable of ascending and descending in the vertical direction is further arranged on the top face of the sliding base. The polishing mechanism comprises a motor, a driving shaft and a polishing assembly. An output shaft of the motor is connected with the polishing assembly through the driving shaft. The dust collection assembly is arranged on the polishing assembly and can absorb chippings generated in the polishing process, so that the situation that the chippings are left in the steel pipe, and consequently the chippings fall to the outside during installation and transportation to cause external environment pollution is avoided.

The utility model provides a disc buckle type steel pipe supporting frame which comprises a vertical rod, positioning blocks are symmetrically connected to the surface of the vertical rod, a disc buckle body is connected to the surface of the vertical rod in a sliding mode, positioning grooves are correspondingly formed in the positions, opposite to the positioning blocks, of the surface of the disc buckle body, and the disc buckle body is fixedly connected with the positioning blocks through fastening bolts. Meanwhile, the side face of the plate buckle body is fixedly connected with a lap joint piece through a plug pin, the side face of the lap joint piece is fixedly connected with one end of a storage rod, the other end of the storage rod is in threaded connection with an extension lead screw through a threaded connection hole, and the two ends of a rotating rod are symmetrically connected with the extension lead screw. According to the steel pipe supporting frame, the vertical rod, the positioning block, the disc buckle body, the fastening bolt, the penetrating groove and the positioning groove are matched, so that the position of the disc buckle body in the steel pipe supporting frame can be conveniently adjusted, and then the practicability of the steel pipe supporting frame is enhanced.

The utility model discloses an irrigation equipment pipeline support which comprises a connecting pipe, atomizing heads are arranged on the surface of the connecting pipe in a circumferential array mode at equal intervals, the atomizing heads are embedded in the connecting pipe, a threaded rod is arranged at the bottom of the connecting pipe, a sleeve is arranged at the bottom of the threaded rod, threads are formed in the top of the sleeve, and the connecting pipe is connected with the connecting pipe. The irrigation equipment pipeline support is provided with the ground insert, the ground insert can play a role in supporting and fixing a whole irrigation equipment water pipe through cooperation with the auxiliary thorns, traditional ground insert fixing is completed through one ground insert, the ground insert is not prone to falling off, and therefore the irrigation equipment pipeline support is convenient to use and high in practicability. When the ground thorn is inserted into the soil, if the ground thorn is unstable, inclines and falls down due to transverse stress, the auxiliary thorns can be matched with the movable ring and outwards pierce into the ground in a scattered manner when the movable ring moves downwards, so that the area of the ground thorn inserted into the soil can be increased by the auxiliary thorns, and the ground thorn is more stable.

A pipe supporting structure includes: a plate-like member being into contact with an outside surface of a pipe; a tube-like member having a tubular shape and configured to support the plate-like member; and a base configured to support the tube-like member, wherein the plate-like member includes a supported portion supported by the tube-like member and an inner side portion surrounded by the supported portion, and the inner side portion has a smaller heat capacity per unit volume than the supported portion.

The utility model discloses a cutting machine for flue check valve production, which comprises a base, a cutting mechanism, a clamping mechanism and a pipe supporting mechanism, the clamping mechanism and the pipe supporting mechanism are both arranged on the base, the cutting mechanism comprises an X-direction moving module, a Z-direction moving module, a mounting seat and a laser cutting machine head, a stand column is arranged on the base, and the Z-direction moving module is arranged on the stand column. The X-direction moving module is fixed to the stand column, the Z-direction moving module is fixed to a moving part of the X-direction moving module, the mounting base is fixed to a moving part of the Z-direction moving module, the laser cutting machine head is fixed to the mounting base, the clamping mechanism comprises a rotary disc, an inner side jacking assembly and an outer side clamping assembly, a fixing frame is arranged on the rotary disc, and the clamping mechanism is fixed to the outer side clamping assembly. And a rotating shaft is arranged on the fixing frame. The utility model relates to the technical field of cutting machines, in particular to a cutting machine for flue check valve production, which is convenient for clamping pipes, can meet the clamping requirements of pipes with different sizes and is not easy to deform the pipes.

The invention relates to the technical field of welding, and discloses unit frame welding equipment for automobile generator machining, which comprises a circular tube support frame, a support beam is fixedly connected to the outer surface of the top of the circular tube support frame, and a support plate is fixedly connected to the outer surface of the bottom of the circular tube support frame. An adjusting limiting mechanism is arranged on the outer surface of the round pipe supporting frame, a follow-up adjusting mechanism and an auxiliary supporting mechanism are fixedly connected to the outer surface of the adjusting limiting mechanism, the adjusting limiting mechanism comprises a first motor, and the output end of the first motor is fixedly connected with a bottom plate. A limiting assembly is clamped in the bottom plate by forming a sliding groove, so that frames with different planes and round pipe sizes can be adapted to be welded, the auxiliary time is shortened, and the welding continuity and efficiency are improved; and the unit frame can be rotated, operation of welding personnel is greatly facilitated, the labor intensity of the personnel is reduced, and the welding quality stability and the production efficiency are improved.

The utility model relates to a metal pipe cutting device. Comprising a machine frame, an operation table top is installed on the machine frame, and a movable pipe clamping assembly and a fixed pipe clamping assembly are installed on the operation table top. The pipe clamping device further comprises a feeding assembly, the feeding assembly comprises a feeding lead screw, the movable pipe clamping assembly is connected with the feeding lead screw through a nut, and the pipe clamping device further comprises a feeding motor used for driving the feeding lead screw to rotate. A cutter assembly is installed on the operation table top. A pipe supporting clamping jaw assembly is installed on the fixed pipe clamping assembly. The movable pipe clamping assembly comprises a pipe clamping transverse moving seat, a front fixed clamping block seat and a front movable clamping block seat are installed on the pipe clamping transverse moving seat, first clamping blocks are installed on the opposite faces of the front fixed clamping block seat and the front movable clamping block seat, and the movable pipe clamping assembly further comprises a movable pipe clamping air cylinder. According to the metal pipe cutting device, the cutting length can be accurately determined, the cutting length of a metal pipe can be conveniently adjusted, the operation process is simple, meanwhile, the metal pipe can be stably positioned in the cutting process, and cutting deflection caused by deflection of the metal pipe is avoided.

The invention relates to the technical field of round pipe polishing machines, in particular to a round pipe polishing machine for automobile part production, which comprises a bottom plate, and a polishing assembly is arranged in the middle of the upper end of the bottom plate and is used for grinding and polishing the surface of a conical exhaust round pipe. One side of the upper end face of the bottom plate is fixedly connected with a discharging frame used for containing unpolished conical exhaust circular pipes, the side, away from the discharging frame, of the upper end face of the bottom plate is fixedly connected with a discharging frame used for assisting in discharging of the polished conical exhaust circular pipes, and the upper end face of the bottom plate is provided with a circular pipe supporting assembly. The two round pipe supporting assemblies are arranged on the two sides of the middle of the upper end face of the bottom plate correspondingly and used for supporting a round pipe to be polished. Compared with the prior art, the problem that in the prior art, it is difficult for a round pipe polishing machine to meet the actual requirement for the polishing quality of the conical exhaust round pipe is solved.

The present invention provides a welding positioning device for an engine pipe body bracket of a drone, which includes a first positioning bracket, a second positioning bracket and a third positioning bracket, and is respectively used for accurately positioning the first pipe body, the second pipe body and the third pipe body of the engine pipe body bracket. Each pipe body penetrates into a pin column with holes to form an assembly base point of the engine. Bolts and nuts are used to penetrate into the pipe body pin column holes to position and fasten the pipe bodies, which can ensure the positioning accuracy of the engine assembly base point and the reliability of the positioning method. According to the correlation between the pipe bodies of the drone bracket, the engine bracket welding positioning device can combine the pipe bodies to form an accurate positioning of the bracket. By accurately positioning the engine bracket, the present invention enables the engine bracket to meet the accuracy requirements specified in the design drawings, meet the installation conditions for the assembly of the drone engine, ensure the stability of the engine function, and provide reliable power support for the drone.

The utility model discloses a fire-fighting construction pipeline rapid installation platform which comprises a bottom vehicle body, the top of the bottom vehicle body is movably connected with a shear shank, a first electric cylinder is obliquely installed in the shear shank, the top of the shear shank is movably connected with an installation bearing table, and a pipeline lifting mechanism is arranged at the bottom of a pipe supporting plate. According to the rapid installation platform for the fire-fighting construction pipeline, by arranging a second electric cylinder, a guide pipe, an extension rod, a stress plate and a pipe supporting plate, when the rapid installation platform is used, the to-be-installed pipeline is horizontally placed on the pipe supporting plate and limited through a clamping plate, along with the installation bearing table in place, when the pipeline is installed, the second electric cylinder extends upwards, and the stress plate pushes the pipe supporting plate to rise slowly; the pipe supporting plate is used for supporting the pipeline to be high, a worker can conveniently conduct operations such as connection and fixation, the guiding pipe and the extending rod are matched with each other, the pipe supporting plate can be stably lifted, the function of automatically lifting the pipeline is achieved, and the problem that the device does not have the function of automatically lifting the pipeline is solved.

The utility model discloses a basement outer wall formwork support which comprises an upper formwork and a lower formwork, a formwork used for pouring is arranged on the upper formwork, a water stop bolt is inserted into the formwork in a penetrating mode, horizontal steel pipes and wooden wedges are symmetrically clamped on the water stop bolt and located on the two sides of the formwork, the wooden wedges are designed to be triangular, and sawtooth slopes are arranged on the inclined faces of the wooden wedges. The sawtooth slope is in extrusion contact with the horizontal steel pipe, the plane of the wooden wedge is in tight contact with the formwork, the lower formwork supports the upper formwork through the inclined supporting steel pipe, and the formwork at the horizontal construction joint of the outer wall is plugged and reinforced, so that the adverse effect of initial deformation of the supporting steel pipe is eliminated; the supporting force is obliquely transmitted to the horizontal construction joint through force transmission path transmission of the water stop bolt, the supporting steel pipe and the inclined face of the wooden wedge, the formwork erecting quality of the key position is greatly improved, the problems of slurry leakage and formwork expansion are solved, the situations such as deformation of the formwork erecting frame are prevented, and the wooden wedge is designed to press the formwork and the steel pipe.

The invention discloses a method for calculating lateral bearing capacity of a large steel pipe supporting frame structure based on finite element analysis, and relates to the technical field of bearing capacity analysis. The method includes the following steps that geometric parameters and material parameters of the steel pipe supporting frame are collected, and a geometric structure model and a finite element analysis model are established; by applying an initial lateral load, calculating the horizontal slip amount, the shear stress and the local maximum pressure stress of the connecting part to obtain a slip effect contribution index; representing a local buckling effect contribution index in combination with geometrical characteristics and material characteristic parameters; collecting parameters such as environment temperature and wind speed, and calculating an environment effect contribution index; and correcting the initial lateral load by combining the three contribution indexes to obtain an accurate lateral bearing capacity value. According to the method, the slip effect, local buckling and environmental factors are comprehensively considered, the calculation precision and applicability are improved, and a scientific basis is provided for design and safety evaluation of the steel pipe supporting frame.

The invention discloses an adjustable pipeline installation auxiliary support and an operation method thereof, and relates to the technical field of pipeline installation, the adjustable pipeline installation auxiliary support comprises a base, and further comprises a supporting assembly, an adjusting seat arranged at the top of the base, a supporting seat arranged above the base and arranged in the adjusting seat, and a cover plate arranged at the top of the supporting seat; an anti-skid plate is fixedly mounted at the bottom end of the interior of the supporting seat, meanwhile, two sets of sliding rods are symmetrically mounted at the bottom of the supporting seat, the two sets of sliding rods are both in sliding connection with the adjusting seat, the telescopic spring is arranged on one sides of the exteriors of the two sets of sliding rods in a sleeving mode, and one end of the telescopic spring is fixedly connected with the adjusting seat; according to the pipeline supporting and positioning device, the axial angle of a pipeline can be adjusted, a worker can adjust the axial angle of the pipeline conveniently while the pipeline is supported and positioned, the axial angle of the pipeline can be adjusted conveniently under different working conditions, butt joint between the pipelines is facilitated, subsequent connection between the pipelines is facilitated, and using convenience and practicability are improved.

The invention relates to the technical field of geological exploration, and discloses a geological exploration steel pipe sampling mechanism which comprises a sampling barrel body and a supporting frame far away from the sampling barrel body, a steel pipe supporting column is integrally installed on the upper side of the sampling barrel body, a movable hole is formed in the supporting frame, and the steel pipe supporting column is slidably inserted into the movable hole in a penetrating mode. The steel pipe supporting column is in sliding fit with the supporting frame, a connecting column is installed on the inner wall of the sampling barrel body, an expansion mechanism is installed on the bottom side of the connecting column, a sampling plate is installed at the movable end of the expansion mechanism, and the expansion mechanism comprises a telescopic rod used for dragging the sampling plate and a track groove used for controlling the telescopic rod to move. The flexibility and adaptability of operation are improved; the sampling barrel body is pushed in the mode that the motor drives the gear and the threads are matched, so that the sampling process is high in automation degree and even in force application, damage to the soil texture structure in a traditional mode can be effectively avoided, it is guaranteed that the obtained sample is closer to the real geological condition, and the accuracy of the geological exploration result is improved.

The invention relates to the technical field of welding of heat energy equipment, in particular to a welding process of miniaturized ultrahigh-temperature heat energy equipment, which comprises the following steps: S1, preparing semi-V-shaped welding grooves for base metal on two sides of a joint by adopting a pipe beveling machine, polishing the grooves and the surface of the base metal, cleaning by using an organic compound, and assembling the to-be-welded joint in a butt joint manner; s2, welding a butt welding seam of the coil pipe and the water cooling wall by adopting manual argon tungsten-arc welding; s3, a thermocouple is fixed to any side of the weld joint, the hot end of the thermocouple is tightly attached to the base metal, the cold end of the thermocouple is connected with a temperature control box, and the interlayer temperature of the weld joint is monitored in real time; s4, when the interlayer temperature is larger than the first temperature, welding is stopped, after a first time interval, a compressed air pipe is used for being matched with an air gun to cool a welding seam and the circumferential direction, and when the layer temperature of the welding seam is reduced to the second temperature, a steel wire brush is used for cleaning the welding seam; and S5, after welding is completed, a welded joint is inspected. The welding device has the beneficial effect that the welding quality and the welding efficiency can be improved.

The invention belongs to the technical field of bridge construction, and particularly relates to a pier replacement construction method for increasing the underpass space of an existing bridge. The method comprises the steps that steel pipe supports are installed on the two longitudinal sides of an original pier of an existing bridge respectively, and jacking systems are installed at the top ends of the steel pipe supports; jacking the end parts of a front bridge span and a rear bridge span above the original bridge pier by using a jacking system until the support on the original bridge pier is disengaged, and taking away the support; block cutting and dismantling are conducted on an original bridge pier straining beam, a bent cap and a pier column in sequence; large-span portal piers are further built on the transverse outer sides of the original piers, and supports are installed; the two jacked bridge spans fall to the top faces of the portal pier supports through a jacking system; and the jacking system and the steel pipe support are dismantled from top to bottom, and pier replacement construction of the existing bridge is achieved. According to the pier replacement construction method, the underpass space of the existing bridge is increased, and the newly-built bridge can smoothly pass through the existing bridge through the large-span portal pier.

The invention relates to the technical field of pipeline supports, and discloses a pressure vessel pipeline supporting device. During working, firstly, one end, deviating from a guide piece, of a guide rod penetrates through a supporting plate and then is fixed through a locking piece, the fixing position of the locking piece is adjusted, and then an adjusting elastic piece is adjusted; the adjusting elastic piece applies pre-tightening force between the guiding piece and the supporting plate, and then the adjusting sleeve is installed on the adjusting rod in a matched mode. The guiding piece is installed on the outer wall of the pressure container in an abutting mode, so that a pipeline on the pressure container is arranged in the inner ring buckle, then the outer ring buckle is installed on the inner ring buckle in a buckled mode and fixed, and auxiliary supporting and stabilizing of the pipeline are completed. By adjusting the position of the locking piece, the compression degree of the adjusting elastic piece can be changed, and therefore the supporting force of the supporting and guiding assembly on the pressure container is adjusted. The supporting device can be dynamically adjusted in severe weather, supporting looseness is prevented, and the stability of pipelines of a top-heavy structure such as a pressure guiding pipe fitting on the pressure container is improved.

The utility model discloses a wire rod pipe penetrating mechanism used for a double-head shell inserting machine, comprising a wire feeding pipe penetrating transverse moving module and a pipe cutting module, the wire feeding pipe penetrating transverse moving module is provided with a transverse moving assembly, the upper end of the transverse moving assembly is provided with a wire feeding assembly, the upper end of the wire feeding assembly is provided with at least two pipe penetrating heads, and the pipe cutting module is provided with a supporting seat. A pipe cutting die holder is arranged at the front end of the supporting seat, an upper cutter and a lower cutter correspondingly matched with the upper cutter are arranged at the upper end of the pipe cutting die holder, pipe supporting holes correspondingly matched with the pipe penetrating head are formed in the front ends of the upper cutter and the lower cutter, a pipe feeding lower driving wheel is arranged at the rear end of the pipe cutting die holder, and a pipe feeding pressing wheel correspondingly matched with the pipe feeding lower driving wheel is arranged at the upper end of the pipe feeding lower driving wheel. A pipe feeding guide frame is arranged at the rear end of the lower pipe feeding driving wheel, and a pipe guiding hole correspondingly matched with the pipe supporting hole is formed in the upper end of the pipe feeding guide frame. The automatic pipe penetrating device has the advantages that the structural design is novel, the structure is compact, automatic pipe penetrating is achieved, the production efficiency is greatly improved, and the production cost is reduced.

An inerter synergistic particle damper pipeline supporting system capable of achieving multi-stage vibration reduction comprises a pipeline, a pipeline support, a universal joint assembly, an outer cavity assembly, a liquid inerter synergistic unit, a particle damper assembly, a rotary particle energy consumption unit, a transmission linkage mechanism and a plurality of tuning springs. According to the system, multi-dimensional vibration of a pipeline is transmitted to a transmission linkage mechanism through a pipeline support and a universal joint assembly, and multi-stage dissipation and absorption of vibration energy are achieved by combining the synergistic effect of a liquid inerter synergistic unit, a particle damper assembly and a rotary particle energy dissipation unit; the system starts different control modes under the action of small-amplitude vibration, large vibration and extreme vibration, efficient vibration control and energy consumption effects are achieved through a three-level response mode, and automatic reset is achieved after external excitation is finished. By means of the synergistic effect of inerter synergy and particle collision energy consumption, efficient control over vibration of the pipe type structure is achieved, the stability of the pipe type structure is improved, and the service life of the pipe type structure is prolonged.

The utility model discloses a foldable electric walker with an adjustable form, which relates to the technical field of electric walkers and comprises a front pedal, two corresponding longitudinal tube supports are fixed on the right side of the front pedal, clamping frames are rotatably connected onto the side surfaces of the longitudinal tube supports, bearing tubes are fixed at the right ends of the interiors of the two longitudinal tube supports, and the bearing tubes are connected with the clamping frames. A connecting support is fixed to the surfaces of the two longitudinal pipe supports, a moving assembly is rotationally connected to the right side of the connecting support, two corresponding pipe head protrusions are fixed to the upper end of the connecting support, pipe head concave parts are rotationally connected to the upper portions of the pipe head protrusions, and four corresponding longitudinal pipes are arranged at the upper ends of the two pipe head concave parts. A wire collecting box is fixed to the upper ends of the four longitudinal pipes, the two longitudinal pipes on the left side are fixed to the upper ends of the two pipe head concave parts, the foldable bicycle can be pulled, lifted and carried on the back after being folded and can be ridden after being unfolded, and a user can conveniently walk instead of walking and carry the bicycle conveniently.

The invention relates to the technical field of steel bifurcated pipe detection, in particular to a device and method for detecting the influence of welding residual stress of a steel bifurcated pipe through water pressure, and the device comprises a main pipe supporting base and a side pipe adjusting supporting base, a steel bifurcated pipe is arranged on the upper side face of the main pipe supporting base, and an ultrasonic stress detector is arranged at the welding position of the outer side face of the steel bifurcated pipe; a main pipe sealing head is slidably arranged on the main pipe supporting base, and a side pipe sealing mechanism is slidably arranged on the side pipe adjusting supporting base. A certain angle is adjusted through the side pipe adjusting supporting base so as to adapt to steel branch pipes with different angles, the use range is widened, the use flexibility is improved, a main pipe sealing head seals a main pipe of the steel branch pipe, a side pipe sealing mechanism seals a side pipe of the steel branch pipe, and a high-pressure metal water inlet pipe injects water into the steel branch pipe; the ultrasonic stress detector is used for detection, the structure is simple, and the detection efficiency is greatly improved.

The invention relates to a deep foundation pit reinforced concrete support-steel pipe support combined system and a construction method, a steel pipe support and an underground diaphragm wall are temporarily mounted and fixed by prearranging components such as anchor bolt holes, support embedded parts and diagonal draw bars, on the basis of ensuring the mounting quality, the construction cost is reduced, the construction convenience is improved, and the construction efficiency is improved. The temporary components can be recycled, and the good environmental protection property is achieved; a steel latticed column and a cast-in-situ bored pile reinforcement cage are welded and anchored in a pile foundation, a channel steel coupling beam is welded and installed on a bracket to form a deep foundation pit stand column supporting system, the stability of foundation pit supporting is guaranteed, and then construction safety is guaranteed; the dragging type steel column is adopted for applying prestress to replace the latticed column needing to be cut off, and the influence on a permanent structure is small in the construction process.

The utility model provides a fused salt storage tank and a temperature control method thereof, the fused salt storage tank comprises a tank body, the tank body comprises a tank bottom, a tank wall and a tank top, the tank bottom, the tank wall and the tank top define a containing cavity, a center detection pipeline penetrating through the containing cavity is arranged in the containing cavity along the axial direction, and the center detection pipeline is communicated with the containing cavity. A working condition detection device for detecting operation conditions in the containing cavity is arranged on the side wall of the center detection pipeline, the working condition detection device is connected with a centralized control system junction box arranged outside the tank body through a connecting wire and the center detection pipeline, and a plurality of layers of heating pipe supporting frames are arranged on the tank wall from top to bottom; and a heating pipe is arranged on each layer of heating pipe support frame. The storage tank is easy to control the temperature of molten salt and uniform in temperature distribution.

The invention belongs to the technical field of deformation monitoring of pipe jacking operation, and particularly discloses a pipeline end deformation monitoring system for deep earthing long-distance pipe jacking operation. Defining external energy and internal energy of each contour unit of the butt-welded pipeline, and judging whether to carry out repair welding operation on each contour unit or not; judging whether to add a steel pipe support measure to each contour unit or not by detecting the shaft body inclination state and the shaft body ovality of each contour unit of the butt-welded pipeline; by determining the butt joint axial coordinate line on the contour of the shaft body of the butt-welded pipeline, the pipe jacking operation strength of the end of the pipeline to be subjected to butt welding is determined, and whether the soil body around the pipeline jacking path is reinforced or not is judged; potential deformation risks are found in time by judging the jacking operation deformation risks of the ends of the pipelines to be subjected to butt welding, and therefore preventive measures are taken before jacking operation.