1077 results about "Tube diameter" patented technology

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 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 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 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 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 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.

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 invention provides a clamp suitable for various pipe diameters and a clamping method. The clamp comprises a first base with a guide groove, a clamping piece arranged on the first base in a sliding mode, an asynchronous adjusting device, a synchronous adjusting device and a clutch device. Wherein the asynchronous adjusting device and the active adjusting device can adjust the position of the clamping piece, so that the clamp can adapt to tubular workpieces with different pipe diameters; besides, the engagement or disengagement state of the driving gear and the driven gear of the synchronous adjusting device can be switched through the clutch device, so that different clamping pieces can be asynchronously adjusted according to the section shape of the tubular workpiece to be clamped, and the clamp can adapt to the section shape error of the tubular workpiece.

The invention relates to the technical field related to intelligent production control, in particular to a powder spraying method and system for the surface of a slender pipe and a medium, and the method comprises the steps that the preprocessed slender pipe is placed on a workbench containing multiple assemblies, electrostatic spraying is conducted through a spray gun, powder feeding adjustment is conducted, the angle of a flow guide groove is dynamically adjusted according to parameter combination, and spraying uniformity is controlled in combination with rotating speed induction. The technical problems that dynamic parameter matching mechanisms for different pipe diameters and wall thicknesses are lacked, airflow changes in the inner space of a slender pipe are difficult to cope with, and uneven distribution of powder in the pipe is likely to be caused are solved, the coating thickness deviation is controlled by associating a spray gun mechanism with a pipe rotating assembly, and the spiral angle of a flow guide groove is dynamically adjusted along with friction torque; and the piezoelectric centrifugal switch is used for detecting the rotating speed fluctuation in real time, the spray gun displacement compensation and the powder feeding amount adjustment are automatically triggered to enable the powder to be distributed in the pipe, and the machining efficiency is improved on the basis that the powder spraying quality of the surface of the long and thin pipe is guaranteed.

The invention relates to an outer cylinder prestress reinforced composite material pipe and a design method thereof, and belongs to the technical field of fluid conveying pressure pipelines. The pipeline comprises an outer cylinder, a middle steel cylinder and a concrete inner cylinder, the pipe diameter is 1600-5000 mm, the outer cylinder is composed of a composite material formed by mixing multiple layers of annularly-wound glass fibers and epoxy resin and is prestressed, the glass fibers account for 50%-70% of the volume of the outer cylinder, the equivalent elastic modulus, the Poisson's ratio and the tensile strength are calculated, mechanical analysis of the composite material is simplified, and the tensile strength of the composite material is improved. The middle steel cylinder is configured as a supporting layer, and the concrete inner cylinder is configured as a pressure-resistant and fluid channel. Based on the thick-wall cylinder theory, the prestress of the outer cylinder enables the concrete inner cylinder to be pressed in advance, the internal pressure tensile stress is counteracted, and the cracking risk is reduced. Under regulation and control of prestress, the outer cylinder bears main circumferential tension, tension of the middle steel cylinder is reduced, and cooperative bearing is achieved. The composite pipe has high strength, light weight and corrosion resistance, the problems that a traditional pipe is prone to cracking, high in steel consumption and short in service life are solved, and safety, durability and economical efficiency are remarkably improved.

The invention relates to a negative pressure quantitative adjustment and fine adjustment system for vacuum sizing of a drip tape production line, and belongs to the field of mechano-electronics. By adopting a mode of combining a mechanical design technology, a microelectronic technology, a communication technology, a pneumatic technology and the like, quantitative adjustment and fine adjustment of the vacuum degree in the vacuum sizing box are realized through independent work or matched and combined work of the air inlet nozzles with different calibers; and the combination mode of the air inlet nozzles stored in the EEPROM storage chip is called according to the production requirements of different pipe diameters and wall thicknesses, so that the production efficiency is effectively improved, and the purposes of accurately determining the diameter and the pipe wall thickness of the drip irrigation belt production line are achieved. The whole system has the advantages of high precision, low cost, convenience in use, high efficiency and the like, and has a wide market prospect.

The invention provides a Venturi tube anti-flash-rust agent filling mechanism which comprises a Venturi jet device, the inside of the Venturi jet device is sequentially provided with a first inlet section, a first contraction section, a first throat part and a first diffusion section from left to right, the first inlet section is cylindrical, the first contraction section is gradually contracted from the tail end of the first inlet section, and the first throat part is communicated with the first diffusion section. The first throat part is the position with the smallest pipe diameter, and the first diffusion section is gradually enlarged from the tail end of the first throat part. Compared with the prior art, the device has the following beneficial effects that the independent mixing mechanism is arranged, the mixing cylinder is integrated at the joint of the venturi jet device and the venturi flow meter, and not only is the mixing impeller arranged in the cylinder, but also the baffle plates arranged at equal intervals are arranged in the cylinder. When the fluid flows through the mixing cylinder, the mixing impeller rotates under the pushing of the fluid to actively stir the flash rust preventing agent and the main fluid, and the baffle plate further changes the flow direction of the fluid to form a turbulent flow effect, so that the mixing uniformity is greatly improved.

The utility model relates to the field of bathroom facilities, in particular to a pedestal pan which comprises a barrel body (1) and a pipeline (2) connected with the barrel body. The barrel body comprises a dirt falling opening (12) formed in the bottom of the barrel body, and a spraying opening (15) is formed below the dirt falling opening. The pipeline comprises a pipeline opening (21), an ascending section (22), a descending section (23) and a pollution discharge section (24), wherein the ascending section (22), the descending section (23) and the pollution discharge section (24) are sequentially connected end to end. The connecting position of the ascending section and the descending section is the highest point of the ascending section and the descending section. The direction of the jet orifice is opposite to the pipeline orifice. And the pipe diameters of the ascending section and the descending section are gradually reduced along the water flow direction. The ratio of the sectional area of the pipeline opening to the area of a first section (221) between the ascending section and the descending section is 1: 0.52-1: 0.72, and the ratio of the sectional area of the pipeline opening to the area of a second section (231) between the descending section and the pollution discharge section is 1: 0.53-1: 0.63. According to the pipeline with the ratio, more flushing dirt can be quickly discharged, the flushing capacity of the pedestal pan is improved, and blockage can be reduced due to the increased pipe diameter.

The invention discloses a rapid assembly welding construction method for boiler steam blowpipes. The method comprises the steps that small-pipe-diameter and large-pipe-diameter welding auxiliary structures are manufactured, pipelines are hoisted to the installation position for butt joint, the corresponding welding auxiliary structures are selected according to the pipe diameters so that pipe openings of the pipelines can be aligned and preliminarily welded and positioned, and final butt joint welding is completed after the auxiliary structures are dismantled. An auxiliary mounting and welding structure of the automatic screwing device is further manufactured, and the device enables a screwing driving mechanism to be in butt joint with a connecting bolt, a nut or an adjusting bolt by adjusting the positions of all parts and drives the screwing driving mechanism to rotate. According to the assembly welding device, the technical effects of quickly and accurately completing assembly welding of the boiler steam blowpipes and improving the construction efficiency and quality are achieved.

The invention relates to the technical field of alloy pipe machining, and discloses high-strength corrosion-resistant alloy pipe continuous extrusion forming equipment which comprises symmetrically arranged base frames and further comprises an operation table, a double-starting hydraulic assembly, a pipe extrusion auxiliary assembly, an inner pipe diameter adjusting assembly, an electromagnetic heating assembly, an automatic discharging assembly and a cooling assembly. According to the equipment, counter-acting force is applied to an extruded pipe in the later stage of the extrusion process through the pipe extrusion auxiliary assembly, the pipe has a slight reverse movement trend at an outlet of the outer mold through reverse thrust, the pipe can be better separated from the mold, and the situation that the pipe is excessively attached to the mold in the extrusion process to generate large friction force is avoided; mold abrasion and pipe surface quality reduction are avoided; according to the equipment, the telescopic heads with different inner diameters are adjusted to be matched with the outer die through the inner pipe diameter adjusting assembly, so that extruded pipes with different inner diameters and wall thicknesses can be formed in the extrusion process, the flexibility is greatly improved, and the production efficiency is improved.

This utility model discloses a ball mill that allows material feeding and discharging without stopping the machine. It includes a drum driven by a motor and its reducer, with a main feed inlet on the side of the drum and a control valve thereon; at least one auxiliary feed inlet on the end face of the drum; a fixed outer tube; and an inner tube installed at the center of the drum's end face and rotating synchronously with the drum. The inner tube contains a centrally located main feed channel and peripheral auxiliary feed channels arranged side-by-side. The inner end of the main feed channel is connected to the drum's inner cavity via a main feed guide pipe and a main feed inlet, while the outer end of the main feed channel is connected to the outer tube along the inner tube's axial direction via a first rotary joint. The inner end of the auxiliary feed channels is connected to the drum's inner cavity via an auxiliary feed guide pipe and an auxiliary feed inlet, while the outer end of the auxiliary feed channels is connected to an auxiliary feed inlet / outlet pipe along the inner tube's radial direction via a second rotary joint. This design ensures smooth feeding and discharging of both main and auxiliary materials in the drum without stopping the machine; prevents material leakage during high-speed drum rotation; and improves the ball mill's applicability and production efficiency.

The invention discloses a fastening device for water conservancy and hydropower construction, relates to the field of water conservancy and hydropower construction auxiliary equipment, and aims to solve the problems of low pipeline butt joint precision, difficulty in parallelism control and poor distance adjusting efficiency in the existing two-group double-pipe parallel construction. The device comprises a bottom plate, a mounting frame, a sliding device, an adjusting device, a clamping device and a control panel, and buffer springs are arranged in supporting legs of the mounting frame. The adjusting device drives the clamping assembly through the bidirectional threaded rod, and coaxiality control over segmented splicing of the long pipeline is achieved. The sliding device is matched with an electric push rod through a sliding rail, and the parallel distance between the two spliced long pipes is adjusted in an electric control mode through a control panel. The device adapts to various common pipe diameters, can be assembled and disassembled by a single person, is stable in fixation, can resist construction vibration and pressure, conforms to related specifications, remarkably improves the construction efficiency, reduces the equipment cost, and is suitable for cooling pipes, water supply pipes, grouting pipes and other scenes.

The application belongs to the technical field of aerospace, weapon equipment buffering and energy absorption protection, and particularly relates to a spring-like superstructure capable of repeated and efficient buffering and energy absorption, which is formed by spirally winding hollow tubes or filling tubes with circular, square, hexagonal, concave negative Poisson's ratio, self-locking or other special cross-sectional shapes; by adjusting the distribution forms of geometric parameters such as the spiral angle, polar angle, number of turns, pitch, winding diameter, tube diameter and wall thickness of the structure, the mechanical properties of the structure can be regulated and controlled. Compared with conventional foam, honeycomb and other traditional energy absorption materials, the application can achieve the purpose of efficient buffering and energy absorption, and can achieve the effect of being reusable.

The invention belongs to the technical field of spiral welded pipe coping, and particularly discloses a coping device and method for spiral welded pipe machining, and the coping device comprises a rack, a pipe end clamping mechanism and a shape follow-up self-adaptive grinding unit. By means of the integrated self-adaptive adjusting mechanism and the multi-dimensional adjusting assembly, spiral welding pipes with different pipe diameters can be rapidly clamped, and the space postures of the grinding wheels can be accurately aligned; particularly, a flexible avoiding mechanism supported by a spring is utilized, so that the guide wheel and the grinding wheel synchronously float when encountering a high welding seam, the clamping stagnation damage of equipment and the bending of a grinding wheel shaft are effectively avoided, the heat influence caused by severe friction is obviously reduced, the metallographic structure change of the welding seam and base metal is prevented, the corrosion resistance of a welded pipe is guaranteed, and the service life of the welded pipe is prolonged. And in cooperation with automatic seam searching of the guide wheel, automatic and high-quality grinding of all welding seams is achieved.

The invention relates to a plastic pipe cutting guide device and a using method. The plastic pipe cutting guide device comprises an operation table, a first pipe diameter positioning module and a second pipe diameter positioning module which are located at the two ends of the operation table correspondingly and used for positioning a plastic pipe, and a plurality of sets of first annular frames and second annular frames are oppositely arranged on the operation table and surround the plastic pipe diameter in an interactive mode; the arc-shaped groove is formed in the middle of the operation table, the air pressure cushion is arranged in the arc-shaped groove to enhance the positioning stability, the cutting arm assembly composed of the linear bearing guide rail is integrated, a cutting tool (a saw blade or a cutting knife) is forcibly restrained to move along a preset absolutely straight path, and the problems that due to manual shaking, a notch is inclined, and burrs are too many are fundamentally solved. The section of the notch is smooth and flat and is always perpendicular to the axis of the pipe, secondary finishing is not needed, and the sealing performance and reliability of follow-up pipe fitting connection are greatly improved.

The invention belongs to the technical field of municipal pipeline detection, and provides a municipal pipeline detection method and system based on nondestructive detection and artificial intelligence, and the method comprises the steps: carrying out the AI reconstruction through the pipe diameter point cloud data of different pipe sections, generating a continuous profile map, and recognizing the pipe sections with reduced pipe diameters; generating a slope curve by using the slope detection data to identify a slope change pipe section; calculating the overlapping mileage proportion of the pipe diameter reduction pipe section and the gradient change pipe section, performing linear fitting on the gradient curve of the overlapping pipe section, and judging the pipe diameter misjudgment risk pipe section according to the decision coefficient; determining a coupling relationship between gradient change and pipe diameter reduction based on historical data of pipe sections of the same type, establishing a coupling model, and judging whether the actual pipe diameter reduction amount and the theoretical pipe diameter reduction amount of the pipe section with the pipe diameter misjudgment risk conform to the coupling relationship or not; if not, the diameter of the oblique section is converted into the real inner diameter according to the gradient inclination angle by combining the RANSAC algorithm, the real inner diameter is compared with the designed inner diameter again to determine whether the pipe diameter is reduced or not, and it is ensured that the pipe diameter detection result is accurate.

The invention discloses a TC11 titanium alloy thick-wall pipe diameter forging process parameter optimization method, which relates to the technical field of metal plastic forming process optimization, and comprises the following steps: clearly defining a structure defect problem caused by non-uniform deformation energy in diameter forging of a specific pipe blank and an optimization target; constructing a simulation model to calculate forming sizes and internal deformation energy distribution under different process parameters; training a neural network agent model embedded with a deformation energy uniformity optimization target; using the model to drive a multi-objective optimization algorithm, and automatically searching an optimal process parameter combination; and selecting and outputting a final optimal process parameter from an optimization result. According to the method, the quantitative index reflecting the deformation energy distribution uniformity is embedded into the process optimization model, so that the internal deformation energy distribution of the material can be collaboratively optimized while the macroscopic size is optimized, and the problem that the recessive factor which affects the final structure performance of the component is difficult to effectively evaluate and actively regulate and control in the process design stage in the existing method is solved.

The invention discloses a casing centralizer with a pipe diameter adjusting function, and relates to the technical field of petroleum and natural gas drilling engineering equipment, the casing centralizer comprises two fixing rings which are symmetrically distributed left and right, the outer surface of each fixing ring is provided with a plurality of fixing seats at equal intervals in the circumferential direction, and each fixing seat is rotatably connected with a connecting plate; an elastic plate is arranged between the left connecting plate and the right connecting plate in the horizontal direction, and the two ends of each elastic plate are rotationally connected with the two adjacent connecting plates respectively. By rotating the adjusting bolt, the driving screw rod and the fixing pipe are in threaded transmission, and the distance between the two fixing rings is accurately controlled, so that the annular supporting frame formed by the connecting plate and the elastic plate generates controllable radial deformation; stepless adjustment of the supporting outer diameter is achieved, different borehole sizes are accurately matched, the problem that a centralizer with a fixed size is insufficient in supporting or difficult to descend is solved, it is ensured that a casing pipe is efficiently centered, and a foundation is laid for forming a uniform cement sheath.

The invention relates to the technical field of industrial product quality detection, and discloses a device and method for detecting the galvanizing thickness of a hot-dip galvanized pipe, and the device comprises a thickness gauge, the two sides of the thickness gauge are provided with clamping supports, the side surfaces of the clamping supports are provided with a plurality of swing arms, the tail ends of the swing arms are provided with electrically-driven Mecanum wheels, and the Mecanum wheels clamp the galvanized pipe together. Compared with the prior art, the self-adaptive centering and clamping device has the advantages that self-adaptive centering and clamping of galvanized pipes with different pipe diameters are achieved through the swing arms and the Mecanum wheel clamping mechanisms which can be adjusted synchronously, the galvanized pipes are directly driven to achieve rotation and translation two-degree-of-freedom movement in the centering and clamping state by means of the motion characteristics of the Mecanum wheels, and the self-adaptive centering and clamping device is suitable for large-scale popularization and application. Through the linkage structure of the follow-up roller, the displacement ring and the detector support, the real-time position compensation of the detector is realized, and the situations that fluorescence signals are not stably received and the detection precision is reduced are avoided.

The invention discloses an annular pipe drilling machine, belongs to the technical field of drilling equipment, and solves the problem that the existing drilling equipment or excavating equipment is difficult to excavate an annular hole in the circumferential direction of a pipeline. The tunneling device comprises a fixing support and a tunneling device body, the fixing support is connected with an excavator or a gantry truss, an inner arc face matched with the radius of a pipeline is arranged at the bottom of the fixing support, and the tunneling device body is installed in the fixing support in a sliding mode. The sliding track line of the tunneling device and the inner arc face of the fixing support are parallel and concentric. According to the annular pipe drilling machine, holes can be excavated in the pipe diameter direction of the PCCP. The invention further discloses a construction method of the annular pipe drilling machine. The construction efficiency can be effectively improved through the method.

The invention belongs to the technical field of medical instruments, and particularly relates to a drainage tube fixing device for head postoperative care, which comprises two groups of headstocks oppositely arranged, an elastic connecting band is connected to the rear sides of the two groups of headstocks, fixing bands are connected to the front sides of the two groups of headstocks, and an arc-shaped frame is connected to the tops of the two groups of headstocks. A rail groove is formed in the arc-shaped frame, a sliding block is arranged in the rail groove in a sliding mode, a connecting block is connected to the front side of the sliding block, a pipe body fixing mechanism is arranged on the connecting block, and the pipe body fixing mechanism comprises a surrounding assembly and an inflation pressing assembly; the hoop embracing assembly containing the elastic expansion strip is combined with the air inflation pressing assembly composed of the air containing cylinder and the piston plate, the piston plate is pushed through the threaded rod to adjust air pressure so as to achieve tightness control over the elastic expansion strip, drainage tubes with different tube diameters can be firmly fixed, and it is avoided that a hard clamp damages the tube wall or compresses a tube cavity.

The utility model discloses a pipe clamp with a self-adaptive pipe diameter, which belongs to the field of pipe clamps, and comprises a support leg, a plurality of pipe clamps and a plurality of pipe clamps, and the self-adaptive pipe clamp component is used for clamping the to-be-clamped pipeline. According to the pipe clamp with the self-adaptive pipe diameter, the self-adaptive pipe clamp components are arranged, firstly, a pipeline to be clamped penetrates through the two sets of self-adaptive pipe clamp components, when the pipeline penetrates into the self-adaptive pipe clamp components, the two sets of pipe clamp molds can be extruded to be away from each other, the two sets of sliding rods move outwards, and springs are compressed, so that the pipeline to be clamped is clamped. The self-adaptive pipe clamp component can be used for self-adaptively clamping pipelines with different calibers, and the pipe clamp mold can be quickly replaced in a sliding clamping manner through the embedded plate and the upper clamping plate, so that the overall universality is improved, and the adjusting component is arranged, so that the pipe clamp mold can be quickly replaced. The distance between the two sets of self-adaptive pipe clamp components can be adjusted, and pipelines with different lengths can be clamped and used.