1873 results about "Tube diameter" patented technology

The invention discloses automatic control equipment for pipe cutting and deburring, and relates to the technical field of pipe fitting machining, the automatic control equipment comprises a workbench, a moving mechanism is arranged on one side of the workbench, and a first rotating mechanism, a first limiting guide mechanism, a cutting mechanism, a second limiting guide mechanism and a second rotating mechanism are sequentially arranged at the top of the workbench; wherein the first rotating mechanism is close to one side of the moving mechanism, and a polishing mechanism is further arranged on the workbench and corresponds to the cutting mechanism. Through cooperation of the moving mechanism, the first rotating mechanism, the first limiting and guiding mechanism, the cutting mechanism, the second limiting and guiding mechanism, the second rotating mechanism and the polishing mechanism, automatic cutting and deburring machining are conducted on pipe fittings with different pipe diameters. And the polishing mechanism is in inclined butt joint with the outer edge and the inner edge of the notch of the pipe fitting, so that extending or hidden burrs on the outer edge and the inner edge are removed.

The invention discloses a roundness supporting device for a large tubular structure and a roundness adjusting method.The roundness supporting device comprises the roundness supporting device body, the roundness supporting device body comprises a circular base and a plurality of supporting columns, and the supporting columns are distributed on the circumferential face of the circular base in a circumferential array mode; the end, away from the circular base, of each supporting column can abut against the inner wall of the circular steel pipe. The device further comprises a rotating column, the rotating column is coaxially installed on the circular base, and a hydraulic expansion piece is vertically connected to the rotating column. The end of the telescopic part of the hydraulic telescopic device is connected with a contour wheel, and the hydraulic telescopic device stretches out to enable the contour wheel to be in rolling fit with the inner wall of the circular steel pipe. The device further comprises a distance sensor, and the distance sensor can detect the change of the distance between the profiling wheel support and the axis of the rotating column in real time. According to the tubular steel roundness adjusting device, the roundness of tubular steel can be accurately adjusted, the machining requirements of large tubular steel with different pipe diameters can be met, accidents such as eccentricity of the tubular steel in the machining process can be avoided, and therefore the finished product quality and operation safety are improved.

The utility model relates to the technical field of shell-and-tube heat exchangers, and particularly discloses a multi-pipe-diameter multi-helix-angle multi-strand winding pipe type heat exchanger. Comprising a shell, a middle core cylinder installed in the shell and a spiral assembly spirally wound on the outer side of the middle core cylinder in the axial direction of the middle core cylinder. The spiral assembly comprises a plurality of spiral winding tube bundle layers which are spirally wound on the outer side of the middle core cylinder in sequence; each spiral winding tube bundle layer comprises a plurality of groups of spiral winding tubes wound on the outer side of the middle core cylinder, and the outer diameters of the spiral winding tubes in each spiral winding tube bundle layer are arranged at equal intervals; one or more fluid media are arranged in the spiral winding pipes on the same layer, and one or more wall thicknesses of the spiral winding pipes are arranged and correspond to the fluid media in a one-to-one mode. The heat exchange requirement and the winding strength requirement can be effectively met, meanwhile, the use efficiency of the material can be improved, and the production and processing cost can be reduced.

The invention provides an elastic pressing type double-probe rotation detection device in a pipeline, and belongs to the technical field of pipeline detection. The detection assembly is rotatably arranged on the base; the detection assembly comprises two groups of probes respectively arranged at two opposite ends, and the probes are configured to detect the inner wall of the pipeline when being close to the inner wall of the to-be-detected pipeline. According to the elastic pressing type double-probe rotary detection device in the pipeline, the passive source weak magnetic detection probe and the active source excitation magnetic detection probe are integrated, so that full-coverage detection and accurate analysis of stress concentration and defects of the inner wall of the pipeline can be realized. A spring system designed by the robot enables the probe to automatically adjust the position and the angle according to different pipe diameters, constant contact pressure between the probe and the surface of the pipeline is ensured, and adaptability and flexibility are enhanced.

The invention discloses a high-performance road and bridge steel formwork structure machining welding device which comprises a base, a square box is fixed to the top of the base, a first through groove is formed in the bottom of the square box in a penetrating mode, a rotating plate is rotatably connected to the interior of the first through groove, and a plurality of annular steel plates are stacked on the top of the rotating plate. According to the welding device for machining the high-performance road and bridge steel formwork structure, through the arrangement of the automatic rapid alignment mechanism, rapid and automatic alignment of a plurality of stacked ring steel plates is achieved, after the ring steel plates are aligned, welding of joints is facilitated, manual alignment operation is not needed, the automation degree is high, alignment is accurate, and the alignment effect is good; meanwhile, the four T-shaped supporting plates and the vertical plates can be adaptively expanded and contracted, ring steel plates of different sizes can be tightly supported and aligned, use of the ring steel plates of different pipe diameters is met, and the application range of the device is widened.

The invention discloses a design method for the thickness of a single-layer socket and the thickness of a composite socket of a socket type pipe. The design method for the thickness of the single-layer socket comprises the steps that a1, a differential equation of radial deformation of a circular ring and a general solution of the differential equation are obtained; a2, calculating a calculation formula of the maximum radial deformation amount of the circular ring; a3, solving the minimum thickness of a single-layer socket; the outermost layer of the composite bellmouth is set as a base layer, other layers are set as non-base layers, and for a multi-layer structure in the composite bellmouth, the design method comprises the following steps: c1, obtaining a circumferential stress calculation formula of any non-base layer; step c2, determining the relationship between the thickness of any non-base layer and the thickness of the base layer; and c3, calculating the thickness of the non-base layer and / or the base layer. By means of theoretical analysis and calculation, the single-layer socket minimum or approximate minimum thickness meeting the deformation requirement and the composite socket minimum or approximate minimum thickness meeting the strength requirement of socket pipes with different pipe diameters can be obtained.

The invention relates to the technical field of plastic-lined pipe production, in particular to an automatic bonding device for large-diameter plastic-lined pipe production. The invention provides an automatic bonding device for large-diameter plastic-lined pipe production, which can adapt to plastic-lined pipes with different pipe diameters and ensure the bonding quality and the production efficiency of the plastic-lined pipes. An automatic bonding device for large-diameter lining plastic pipe production comprises a base, side plates and the like, and the side plates are connected to the upper sides of the left portion and the right portion of the base. After a metal pipe penetrates through a heat conduction ring and a water spraying ring, a contact roller makes contact with the outer wall of the metal pipe, a high-temperature-resistant rubber ring and a shaping rubber block are extruded by the outer wall of the pipe to deform, and gaps between the heat conduction ring and the pipe are filled in a self-adaptive mode, so that the gaps of the same size are always kept between alumina fiber heat preservation cotton and the outer walls of the metal pipes with different pipe diameters; and the effects that the device can adapt to the plastic-lined pipes with different pipe diameters, and the bonding quality and the production efficiency of the plastic-lined pipes are ensured are achieved.

The invention relates to a spraying device for anti-corrosion heat preservation pipeline production, which comprises a buried electromagnetic sliding rail, a sliding block on the buried electromagnetic sliding rail is rotatably connected with a base unit, spraying arched door frames are erected on the two sides of the buried electromagnetic sliding rail, a pipeline inner supporting structure is arranged on the base unit, and a pipeline inner supporting structure is arranged on the pipeline inner supporting structure. A coating storage barrel is fixedly arranged at the top of the spraying arch frame, an air pump is fixedly arranged on one side of the coating storage barrel and located on the spraying arch frame, a spraying structure is arranged on the lower surface of the spraying arch frame, and a control table is fixedly arranged on one side of the spraying arch frame. Every two base units form a set, and the set of base units shuttle the spraying arch frame. The heat preservation pipe can be driven to move through the base unit, mounting and transferring are more convenient and faster, mounting of the heat preservation pipe can be completed without a forklift or a lifting device, the pipeline inner supporting structure can be suitable for heat preservation pipes with different inner pipe diameters, universality is improved, and manpower is reduced.

According to the method, a cone rolling device is additionally arranged between an upper roll shaft and a lower roll shaft of the plate rolling machine, reverse resistance is provided through friction between the cone rolling device and materials, the rotating speed of a small round end is reduced, and when the upper roll shaft and the lower roll shaft rotate synchronously, the speed difference is generated between a large round end and the small round end, and the conicity is formed. By additionally arranging the cone rolling device, the cone rolling function can be achieved on the three-roller four-roller plate rolling machine. According to the implementation method, the machining efficiency is high, the finished product quality is stable, the machining requirements of various tapers and various pipe diameters are met, the adjustment time of a single-time positioning device is shortened, the production efficiency is high, and the quality is stable. And meanwhile, on the premise that the original machine type is not adjusted, the machining function and range of equipment are increased, the production efficiency and machining quality of the rolled conical pipe are improved, and the manual adjustment time and labor intensity are reduced.

The invention relates to the technical field of socket steel pipes, and provides socket steel pipe machining equipment which comprises an expanding forming machine, and a machining feeding port is formed in the front end face of the expanding forming machine; the bearing frame is arranged on the front side of the front end face of the expanding forming machine, and the length direction of the bearing frame is parallel to the axial direction of the machining feeding port. The lifting carrier roller frames are arranged on the bearing frame at intervals in the length direction of the bearing frame and used for bearing steel pipes and adjusting the height of the steel pipes so that the steel pipes can be aligned to the machining feeding opening. The multiple discharging vertical plates are arranged on the bearing frame at intervals, at most one discharging vertical plate is arranged between every two adjacent lifting carrier roller frames, and after the lifting carrier roller frames descend to the height lower than the discharging vertical plates, the first guide faces are used for guiding the steel pipes to slide to one side of the bearing frame. The technical problems that in the prior art, feeding and discharging time is long after socket steel pipes are machined, and pipelines with different pipe diameters cannot be rapidly and accurately centered are solved.

The utility model discloses a butt joint device for large steel pipes with different diameters, and relates to the technical field of bridge steel pipe connection. Comprising an annular groove formed close to the butt joint end of a steel pipe, a sleeve column is installed on the annular groove, a fixing piece used for limiting the sleeve column is arranged on the side, away from the butt joint end, of the sleeve column, a flange plate is fixed to the side, facing the butt joint end, of the sleeve column, and an abutting piece is fixed to the end, facing the butt joint end, of the steel pipe. The side, facing the butt joint end, of the flange plate is provided with an attaching concave ring matched with the abutting piece. Through the arrangement of the flange plate, the fixing piece and the like, in the high-altitude steel pipe butt joint construction process, installation is easy, meanwhile, construction safety is guaranteed, compared with a traditional welding mode, the connecting mode can guarantee connecting precision to a certain degree, use of a large number of welding materials can be reduced, and cost is reduced. Under the condition that the installation steps are simplified, the cost can be high, and the connection strength between the steel pipes with different pipe diameters can be maintained at the same time.

The invention discloses a carbon fiber pipe inner wall polishing mechanism which comprises a base, a fixing frame is fixedly mounted at the top of the base, a reciprocating assembly is mounted in the fixing frame, a connecting assembly is fixedly mounted at the top of the reciprocating assembly, an axis assembly is rotatably mounted in the connecting assembly, and one end of the axis assembly is in transmission connection with an output assembly. One end of the shaft center assembly is fixedly provided with an adjusting assembly, the other end of the shaft center assembly is fixedly provided with a support assembly, the shaft center assembly is in threaded connection with the adjusting assembly, and the top of the support assembly is fixedly provided with a polishing assembly. Different instruments do not need to be replaced according to the pipe diameter every time the pipe is replaced, the fine-mesh grinding block is installed on the installation frame connected with the first fixing cylinder, the coarse-mesh grinding block is installed on the installation frame connected with the second fixing cylinder, and the problem that fine grinding is conducted after coarse grinding is completed, and a grinding head needs to be detached and replaced is solved.

The invention relates to the technical field of welding, and discloses a precise positioning thin-wall refrigeration pipe deformation-free welding tool which comprises positioning plates, the bottom ends of the positioning plates are slidably connected with the top end of a workbench, the positioning plates are symmetrically distributed with the median line of the workbench as the center, and one end of one positioning plate is provided with an outer pressing piece for limiting the outer wall of a pipeline; an inner supporting piece for supporting the inner wall of the pipeline is arranged at the end, close to the outer pressing piece, of the other positioning plate. The inner supporting piece is provided with the supporting rings, the supporting rings are located on the two sides of a pipeline welding seam correspondingly, different-diameter parts of the reducer pipe can be supported correspondingly, the inner supporting piece adapts to refrigeration pipes with different pipe diameters, the universality of the inner supporting piece is improved, and the welding supporting requirements of the refrigeration pipes of various specifications can be met; the two supporting rings are arranged on the same circular shaft, the coaxiality of the two supporting rings is guaranteed, then it is guaranteed that the circle centers of the two parts of the reducer pipe are always coaxial, and the position precision of a pipeline can be maintained in the welding process.

The invention discloses a diaphragm valve flow test system and method, and the system comprises a first test assembly and a second test assembly, and a first pressure measurement port of the first test assembly and a second pressure measurement port of the second test assembly are respectively communicated with a to-be-tested valve; a first test pipeline communicated with the first test assembly is provided with a circulation path in a first direction; a second testing pipeline communicated with the second testing assembly is provided with a circulation path in the first direction. The upstream and downstream pressure values of the to-be-tested valve can be accurately detected through the first pressure gauge and the second pressure gauge, and the gas flow value is detected through the flow meter and substituted into a calculation formula to obtain an accurate flow coefficient value; the upstream first testing assembly and the downstream pressure measuring device are arranged at a specific distance according to the pipe diameter of the communicating pipeline, and the accuracy of the pressure value can be effectively ensured through the limitation of the pipe diameter and the distance; the actual temperature value of the fluid in the test system pipeline is monitored through the thermometer, and the influence of the temperature on the test result is effectively reduced.

The device comprises a mold body, a first pushing assembly and a second pushing assembly, the first pushing assembly comprises a first driving part and a first pushing head, the first pushing head is provided with a cavity, the cavity penetrates through the two ends of the first pushing head, the first pushing head is further provided with an opening, and the opening communicates with the cavity; the second pushing assembly comprises a second driving part, a second pushing head and a filling ball, the filling ball enters the cavity through the opening, and the second pushing head is driven by the second driving part to push the filling ball to move into the pipe blank along the cavity. Therefore, the bent pipe with the large pipe diameter and the small bending radius can be formed through secondary push bending of the second pushing assembly on the premise that pressure is not unloaded after primary push bending forming, larger bent pipes with more specifications and sizes can be formed on machine tool equipment with limited specifications, the cost of the machine tool equipment is saved, and the production efficiency of the bent pipe is improved.

The utility model relates to the technical field of pipeline machining, and discloses a large-diameter pipeline roundness correcting tool which comprises a base and a fixing mechanism located on one side of the base and used for fixing a pipeline, a rotating cylinder is rotationally installed on the top of the base, an inner supporting mechanism is arranged on one side of the base, and a rotating shaft is arranged on the rotating cylinder. The base is provided with a driving mechanism used for rotating the inner supporting mechanism. The fixing mechanism is arranged to fix a pipeline needing to be corrected, the inner supporting mechanism is arranged to extrude and tightly support the interior of a port according to pipelines with different pipe diameters, the roundness of the port of the pipeline is corrected in the tightly supporting process, the driving mechanism is matched with a rotating roller in the inner supporting mechanism to roll along the inner wall of the pipeline after the pipeline is tightly supported, and therefore the pipeline can be corrected. And therefore, the port of the pipeline is extruded more uniformly, and the roundness value is corrected more accurately.

The invention discloses a foundation treatment method for determining the thickness of a replacement cushion layer of an underground water supply and drainage pipeline. The foundation treatment method comprises the steps that S1, it is determined that a pipeline foundation is a concrete foundation or a gravel foundation; s2, the required foundation bearing capacity is calculated; s3, checking whether the bearing capacity of the uncorrected pipe bottom soil layer foundation meets the design requirement or not, and if yes, carrying out foundation treatment of replacing and filling a cushion layer; if not, foundation treatment of the replacement cushion layer is conducted, and the thickness of the replacement cushion layer is calculated according to the following formula; according to the method, the accuracy and quickness of calculation of the replacement thickness are improved, the working efficiency is improved, unnecessary waste is reduced, the foundation treatment method for determining the foundation bearing capacity needed by pipelines with different pipes, pipe diameters and earthing thicknesses and the thickness of the replacement cushion layer is provided, the needed foundation bearing capacity is determined according to the different pipes, pipe diameters and earthing thicknesses, and the foundation treatment effect is improved. And when a soft soil layer exists at the bottom of the pipe, a foundation treatment method adopting a replacing and filling cushion layer is provided, the requirement for foundation bearing capacity can be met, and safe operation of the pipe is guaranteed.

The invention relates to the field of laser cutting, in particular to a pipe diameter self-adaptive laser pipe cutting machine and method, the pipe diameter self-adaptive laser pipe cutting machine comprises a cutting table and a cutting head, and the cutting table is connected with a limiting assembly which corresponds to the cutting head and is used for limiting pipe fittings with different pipe diameters; through cooperative work of the multiple adjusting screws and the limiting balls, the limiting position can be automatically adjusted according to different pipe diameters, self-adaptive clamping of pipe fittings with various pipe diameters is achieved, the application range is wide, meanwhile, through limiting cooperation of the limiting arc plates and the limiting balls and centripetal pressure provided by the abutting screws, the pipe fittings with the different pipe diameters can be clamped, and the clamping precision is improved. And it is ensured that pipe fittings with different pipe diameters can be kept stable in the cutting process, and the situation that cutting errors affect the quality of cut finished products is avoided.

The invention discloses a high-thermal-conductivity insulating electric power engineering material and a preparation method thereof, and relates to the technical field of insulating material preparation. The composite material is prepared from 40-60 parts of polyimide resin, 20-30 parts of boron nitride nanosheets, 10-15 parts of alumina micro powder, 5-10 parts of a silane coupling agent, 3-8 parts of a plasticizer, 2-5 parts of an antioxidant, 1-3 parts of carbon nanotube whiskers, 1-2 parts of graphene quantum dots and 0.5-1 part of rare earth yttrium oxide. The diameter-thickness ratio of the boron nitride nanosheet is 100-200, the particle size of the alumina micro powder is 1-5 [mu] m, the diameter of the carbon nanotube whisker is 5-20 nm, the length is 1-5 [mu] m, and the particle size of the graphene quantum dot is 2-10 nm; all the raw materials are synergistically matched, so that the material is expected to have high thermal conductivity and excellent insulating property and is suitable for the field of electric power engineering. The material has high thermal conductivity and excellent insulativity, the thermal conductivity coefficient is not lower than 5 W / (m.K), the volume resistivity is not lower than 1015 omega.cm, and the breakdown field strength is not lower than 30 kV / mm.

The utility model relates to the technical field of pipeline processing, in particular to a rotary friction welding device for a large-pipe-diameter pipeline, which comprises a placing frame, the pipeline is placed on the placing frame, a pipeline clamping mechanism is installed at the front end of the placing frame to clamp the pipeline and align to a joint, and the joint is clamped in a joint profiling welding tool and is driven by a welding standard machine to rotate and feed. A tail plate is arranged at the rear end of the placing frame, the tail plate moves at different positions of the track to be connected with the pipeline in a clamping mode, pipeline products of different lengths are welded, a connector profiling tool opposite to the connector profiling welding tool is arranged on the tail plate, and the connector profiling tool is matched with the connector profiling welding tool to adjust the relative angle of connectors welded to the two ends of the pipeline. The situation that the installation condition of a client cannot be met due to too large relative angle deviation is prevented; the welding device is used for solving the problem of welding of the pipeline and the connector, welding of the pipeline and the connector can be rapidly achieved at low cost, and the installation requirement and the market requirement of the energy storage pipeline are met.

The utility model relates to a positioning device for machining an integrated thin-walled tube, and belongs to the technical field of machining. When in use, an operator axially inserts the device into a pipe hole of the thin-walled pipe, adjusts the axial position of the conical pin through the screw rod, and further pushes the wedge-shaped block to move along the supporting pipe in the radial direction, so that the inner wall of the thin-walled pipe is supported in the radial direction, vibration of the thin-walled pipe in the machining process is effectively reduced, and machining efficiency is improved. Deformation and damage of the thin-walled tube caused by cutter pressure are avoided, the geometrical shape and dimensional accuracy of the thin-walled tube are guaranteed, and therefore the machining stability and the surface machining quality of the thin-walled tube are improved.

The large-pipe-diameter long-distance pipe jacking construction device suitable for the soft soil area comprises a frame body, a force transmission frame is arranged on the other side, close to a tunnel portal, of the frame body, and the force transmission frame is anchored to the front end well wall around the tunnel portal through a reverse pulling device; an anti-kowtow device is assembled on the force transmission frame; the lower end of the kowtow prevention device is in elastic contact with the tube push bench to prevent the tail of the tube push bench from upwarping; when the jack retracts, anti-retreating devices are assembled between the force transmission frame and the tail section of the pipe jacking machine and between the force transmission frame and the first pipe section so as to prevent the pipe jacking machine and the first pipe section from retreating under the action of water and soil pressure. When the pipe jacking machine performs jacking construction, an anti-torsion device is assembled between the force transmission frame and the tail section and / or the first pipe section of the pipe jacking machine so as to resist torque generated by a cutter head of the pipe jacking machine. Therefore, the pipe jacking machine can be effectively prevented from retreating, twisting, knocking and the like when going out of a hole initially, so that the pipe jacking work is completed safely, efficiently and economically, and the pipe jacking construction quality is improved.

The utility model provides a crimping machine for a metal tube, which comprises a bottom plate and the metal tube, a vertical plate and a base are arranged on the bottom plate, an air cylinder is arranged in the base, a trapezoidal pushing block is arranged at the output end of the air cylinder, a self-centering clamping assembly is arranged on the inner side of the vertical plate, and the trapezoidal pushing block is arranged on the inner side of the vertical plate. And the self-centering clamping assembly comprises a rotating seat and a fixed seat, two first clamping wheels are rotationally connected to the fixed seat, an L-shaped connecting rod is rotationally connected to the rotating seat, a rolling wheel is rotationally connected to the end, close to the trapezoidal pushing block, of the L-shaped connecting rod, and a second clamping wheel is rotationally connected to the end, close to the metal pipe, of the L-shaped connecting rod. According to the crimping machine for the metal pipes, the metal pipes with different pipe diameters can be clamped by using the self-centering clamping assembly, and after the metal pipes are clamped, the circle centers of the metal pipes with different pipe diameters are positioned at the same height, so that an additional centering process is not needed, the workload is reduced, and the production efficiency is improved. And the metal pipes on the two sides can be sleeved and crimped conveniently.

The invention belongs to the technical field of drainage pipeline repairing, and particularly relates to a non-excavation repairing method for defects in a large-pipe-diameter drainage pipeline. Comprising the steps of prefabricating a steel formwork, plugging and guiding water in a drainage pipeline, dredging and detecting the interior of the pipeline, conducting ventilation testing, enabling constructors to go down a well for operation, chiseling defect positions, cleaning and removing loose parts and garbage, brushing a concrete interface agent, positioning, installing and fastening the steel formwork, connecting a grouting pipe and grouting equipment, preparing a grouting material, and then conducting pressure grouting. The method for repairing the defects in the drainage pipeline has the advantages that the grouting technology is applied to repairing of the defects in the drainage pipeline, the repairing quality is improved, and the manufacturing cost is saved.

The utility model discloses PE pipe polishing equipment which comprises a feeding assembly, and outer polishing assemblies are arranged at one end of the feeding assembly side by side. Inner polishing assemblies are arranged at the ends, away from the feeding assembly, of the outer polishing assemblies side by side. The outer polishing assembly and the inner polishing assembly are arranged at the same time, synchronous polishing treatment on the inner surface and the outer surface of the PE pipe is achieved, the polishing period is remarkably shortened, and the production efficiency is improved; two polishing rollers in the outer polishing assembly are driven in a chain transmission mode, and the rotating speed and the rotating direction can be flexibly adjusted so as to meet the polishing requirements of PE pipes of different materials and wall thicknesses. Meanwhile, the inner polishing assembly can accurately adjust the position and height of a polishing wheel through cooperation of a linear sliding table and a worm gear lead screw lifting machine, the polishing machine is suitable for polishing PE pipes of various pipe diameters, the frequency of replacing a polishing head is reduced, the cost is greatly reduced, and therefore an efficient, economical and reliable solution is provided for polishing treatment of the PE pipes.

The invention relates to the technical field of pipeline leakage detection, and discloses a novel infrasonic wave sensor suitable for pipe diameters below 100mm. The infrasonic wave sensor comprises an infrasonic wave sensing assembly, a wireless communication module and a control module, and pipeline leakage detection model selection parameters and pipeline leakage detection model updating parameters are extracted; selecting a target pipeline leakage detection model matched with the current pipeline diameter state of the target pipeline from the first comparison table, and matching model correction parameters corresponding to the target pipeline leakage detection model in the second comparison table, and updating the currently stored pipeline leakage detection model by using the target pipeline leakage detection model added with the model correction parameters so as to carry out pipeline leakage detection and alarm. Therefore, by comprehensively considering the environmental influence, the pipe diameter change caused by medium transportation wear and the influence of different pipeline flows on the pipeline leakage detection, the pipeline leakage detection accuracy of the infrasonic wave sensor in the scene with the pipe diameter smaller than 100 mm can be improved.

A borehole inclination measuring device belongs to the technical field of borehole inclination measuring and comprises a protruding block with a through opening, at least three movable rods are rotatably mounted on the outer surface of the lower end of the protruding block at equal intervals in the circumferential direction, auxiliary wheels are rotatably mounted at the top ends of the movable rods, and springs are fixedly mounted between the movable rods and the outer surface of the protruding block. The position of the top end of the movable rod can be adjusted in a self-adaptive mode, the auxiliary wheel is made to be attached to the inner side wall of the inclinometer pipe, the auxiliary wheel is made to be attached to the inner side wall of the inclinometer pipe, the auxiliary wheel is made to be attached to the inner side wall of the inclinometer pipe, and the auxiliary wheel is made to be attached to the inner side wall of the inclinometer pipe. The applicability of the device in the environment of inclinometer pipes with different pipe diameters is greatly enhanced, and a powerful guarantee is provided for high-precision and high-efficiency borehole inclinometer work.

The invention relates to the field of RTP pipelines, in particular to a large-diameter special composite RTP pipeline rapid installation device which comprises a first end, a second end, a limiting ring, a connecting device, a first circular ring and a second circular ring. A connecting ring is formed at the first end, and a first limiting groove and a second limiting groove are formed in the inner side and the outer side of the connecting ring correspondingly; a connecting cavity capable of being matched with the connecting ring is formed in the second end, the limiting rings are embedded in the inner side and the outer side of the connecting cavity respectively, the connecting devices are arranged on the first limiting groove and the second limiting groove respectively, magnets are arranged on the connecting devices, and the magnets on the first limiting groove and the magnets on the second limiting groove are opposite in magnetism. The first limiting groove is sleeved with the first circular ring, the second circular ring is arranged in the second limiting groove, the thermal bimetallic strips are arranged on the outer side of the first circular ring and the inner side of the second circular ring correspondingly, pipelines with pipe diameter differences can be rapidly connected under the eccentric condition, and the pipeline installation efficiency can be improved while the problem of uneven stress is solved.

The utility model relates to the technical field of coating equipment, in particular to a tubular structure and thermal field equipment. The tubular structure comprises a furnace tube and a heating furnace door, and the furnace tube is provided with a furnace chamber; the heating furnace door is arranged at a pipe opening of the furnace pipe, the heating furnace door is connected with the furnace pipe to seal the furnace cavity, and the heating furnace door is suitable for heating the furnace cavity. The heating furnace door is suitable for heating the furnace chamber so as to increase the temperature in the furnace chamber and the range of a constant-temperature area in the furnace chamber and improve the uniformity of a temperature field in the furnace chamber, so that the quality of a workpiece to be machined is improved; and moreover, the furnace tube can be provided with a larger tube diameter, so that more workpieces to be machined can be placed, and the productivity of the tubular structure is effectively improved. According to the heating furnace door, when the range of the constant-temperature area in the furnace cavity is increased, more areas suitable for machining the to-be-machined workpieces exist in the furnace cavity, and therefore more to-be-machined workpieces can be further placed in the furnace cavity, and the productivity of the tubular structure is further improved.

The utility model discloses a PE pipe diameter detection mechanism, and relates to the technical field of PE pipe detection, the PE pipe diameter detection mechanism comprises a workbench and a rotating sleeve arranged on the workbench, the rotating sleeve is provided with a through groove for a PE pipe to pass through, the central axis of the through groove and the central axis of the PE pipe coincide with each other, and the inner wall of the through groove is provided with a detection assembly used for detecting the pipe diameter of the PE pipe; the PE pipe diameter detection mechanism further comprises a clamping assembly used for positioning the PE pipe. Through the clamping assembly, a PE pipe can be conveniently fixed, it is ensured that the central axis of the PE pipe and the central axis of the rotating sleeve coincide and are aligned, inaccurate detection numerical values caused by deviation of the detection assembly are prevented, the detection assembly is arranged in the through groove in the rotating sleeve, 360-degree detection of one section of position of the PE pipe can be automatically achieved in cooperation with the rotating assembly, and through the arrangement of the moving assembly, the detection accuracy is improved. And the rotating sleeve can be driven to move along the central axis of the PE pipe, so that the next detection point can be quickly switched, and the detection efficiency is effectively improved.