422 results about "Pipeline transport" patented technology

The invention discloses a method and a system for measuring flow and iron content of fine iron ore pulp. The method comprises the following steps of: sleeving two detection coils with the same parameters on a transportation pipeline of iron fine powder ore pulp in a front-and-back spaced manner, connecting the two detection coils into a detection module, and acquiring two similar detection signals with time delay of the two detection coils when the detection signals flow through the iron fine powder ore pulp by using the detection module; and measuring and detecting the flow and the iron content by utilizing the property that the iron concentrate pulp contains ferromagnetic substances in the two detection signals. According to the invention, the volume flow rate of the iron fine powder ore pulp in the pipeline transportation process and the content of iron elements in the ore pulp can be detected in real time, the iron fine powder ore pulp can be monitored in the transportation process, control, distribution and settlement are convenient, and the iron content of the iron fine powder ore pulp can be known in real time, so that the iron content of the iron fine powder ore pulp can be known approximately.

The invention discloses a tunnel prefabricated pipeline sending system and a conveying method thereof, and belongs to the technical field of pipeline transportation, the system comprises at least two pipeline conveying trolleys located in a tunnel, and each pipeline conveying trolley comprises a roller base and a bearing assembly connected with the roller base; the bearing assembly is used for supporting a prefabricated pipeline; the conveying device is located outside the tunnel, and the conveying device is used for conveying the prefabricated pipeline into the tunnel; and the pipeline welding equipment is located outside the tunnel, and the pipeline welding equipment is used for welding the multiple pipe sections into the prefabricated pipeline. The prefabricated pipeline is installed outside the tunnel, and the installation efficiency and the installation safety of the prefabricated pipeline are improved; and the prefabricated pipeline outside the tunnel is dragged into the tunnel, the pipeline is fixed in the tunnel, and rapid installation and fixation of the pipeline in the tunnel are achieved.

The invention relates to the technical field of pipeline hoisting, in particular to intelligent large pipeline hoisting equipment and method.The intelligent large pipeline hoisting equipment comprises a first portal frame, a track beam and a second portal frame, and the track beam is arranged above the first portal frame and the second portal frame; a walking trolley moving in the length direction of the track beam is arranged on the track beam and used for hoisting and transporting a pipeline. The first portal frame is used for achieving butt joint of a loaded pipeline and a to-be-loaded pipeline, and the track beam and the second portal frame are matched to achieve transportation of the to-be-loaded pipeline to the first portal frame. Different from an existing manual pipeline butt joint mode, a pipeline hoisting point is arranged at the top of the slope, the pipeline hoisting, transporting and butt joint process is controlled through the portal frame control system, operation is completed through automatic control, labor is reduced, the labor cost is reduced, and the construction efficiency is improved.

The utility model relates to the technical field of pipeline transportation, in particular to a pipeline transport vehicle. The technical problems that in the pipeline transportation process, due to the fact that the road surface of a construction site is uneven, a fixing structure is lacked, and a pipeline cannot be well limited and fixed, the pipeline is prone to rolling on a transportation vehicle in the transportation process, the pipeline deviates and falls off from the transportation vehicle, and therefore the pipeline carrying efficiency is affected are solved. According to the technical scheme, the pipeline transport vehicle comprises a pipeline body, a support assembly, a buffering assembly, a base assembly, a moving assembly, a first clamping assembly and a second clamping assembly; compared with a traditional pipeline conveying device, the pipeline conveying device has the advantages that the two clamping structures are arranged to be used in a matched mode, the side portion and the upper portion of a placed pipeline can be clamped and fixed, the pipeline is limited, when the pipeline is conveyed, the pipeline can be prevented from rolling in the pipeline conveying device, the pipeline can be prevented from deviating and sliding off from the pipeline conveying device, and the conveying efficiency is improved. Therefore, the transportation efficiency of the pipeline is improved.

The invention discloses a pipeline transportation device under complex geographical conditions and a using method thereof, and belongs to the field of pipeline installation. The device comprises a pipeline arc-shaped bearing piece, a bearing connecting pipe, a manual auxiliary rod, a power device, a ball bearing, a bearing bearing device, a square connecting plate, a trundle fixing plate, a trundle and a trundle transmission device. The pipeline arc-shaped bearing part is of an arc-shaped structure, a bearing connecting pipe is vertically arranged in the center of the bottom of the pipeline arc-shaped bearing part, the lower portion of the bearing connecting pipe is connected with a ball bearing, the ball bearing is fixed above a bearing carrying device, the bearing carrying device is channel steel, and four trundle transmission devices are symmetrically arranged on the two sides of the channel steel and connected with four trundle transmission devices respectively. And a power device is arranged in the bearing carrying device. The pipeline transportation device is suitable for transportation of 6-8m long pipelines with the pipe diameter of DN 250mm-DN 350mm in construction in complex environments such as mountainous regions and hills, is convenient, quick and safe to use, and can reduce the transportation cost.

The invention discloses an intelligent pipeline monitoring system and method based on the Internet of Things, relates to the field of pipeline transportation, and solves the problem that an existing pipeline monitoring system is poor in monitoring effect. The pipeline pressure monitoring data module is used for carrying out pipeline local vibration monitoring on each pipeline monitoring area, obtaining an area vibration change rate corresponding to each pipeline monitoring area according to a monitoring result, obtaining pipeline vibration monitoring data, and sending the pipeline vibration monitoring data to the data processing module; and the monitoring and early warning module is used for carrying out monitoring and early warning on each pipeline monitoring area in the target pipeline according to the pipeline vibration monitoring data. According to the invention, the pertinence and the accuracy of the pipeline monitoring process can be improved.

The utility model discloses a silt deposition prevention pipeline for long-distance horizontal transportation, and relates to the field of long-distance horizontal pipeline transportation. The device comprises a horizontal pipeline, a connector, a stirrer and the like. The horizontal pipeline and the stirrer are connected through connectors, and the connectors are arranged on the left side and the right side of the stirrer to be connected with the horizontal pipeline to form a whole. Water flow flows into the stirrer through the horizontal pipe, the pipe diameter is enlarged, the water flow scours blades on the lower portion of the rotating paddle in the stirrer to drive the rotating paddle to work, other substances in the water flow are stirred, and sediment and the like are prevented from depositing.

The invention discloses a large-pipe-diameter heavy steel pipe conveying device suitable for a U-shaped valley high abrupt slope section, and belongs to the technical field of pipeline transportation, the large-pipe-diameter heavy steel pipe conveying device comprises a pipeline buttress, a rail, a conveying assembly and a winch, the conveying assembly is in sliding connection with the rail, and the winch is connected with the conveying assembly through a steel wire rope; the conveying assembly comprises a supporting assembly and lifting assemblies located on the two sides of the supporting assembly, the supporting assembly and the lifting assemblies are connected through traction rods, and pulley assemblies matched with the rails are arranged at the bottom of the box body and the bottom of the door frame. The pipelines are supported through the steel cables in the supporting assembly, the pipelines are lowered and adjusted through the lifting assembly, lifting and conveying of the multiple pipelines can be achieved through the multiple lifting tools, the number of times of resetting of the conveying assembly is reduced, and the pipe conveying and distributing efficiency is effectively improved.

The invention provides a hydrogen-rich natural gas sound velocity measurement and verification method based on an external clamping type ultrasonic flowmeter, and a hydrogen-rich natural gas mixture sound velocity measurement device with adjustable components is used in the method. The method comprises the following steps of building the component-adjustable hydrogen-rich natural gas mixture sound velocity measurement device, representing the external clamping type ultrasonic flowmeter, calibrating the external clamping type ultrasonic flowmeter, measuring the sound velocity of hydrogen-rich natural gas, calculating the uncertainty of sound velocity measurement and correcting a standard model. According to the method, a self-made sound velocity measuring device based on an external clamping type ultrasonic flowmeter is included, the device can keep temperature, pressure and other thermodynamic conditions stable and controllable in the whole measuring process, and therefore it is guaranteed that accurate sound velocity characteristics are obtained, and then a prediction model of the characteristics of the current gaseous natural gas and similar mixtures is corrected; a contribution is made to the accuracy of a thermodynamic property calculation program in a field flow instrument, and the ultrasonic flowmeter installed on a pipeline for conveying pure hydrogen or mixed hydrogen is calibrated in the future.

The invention discloses a self-adaptive variable spiral motion modular robot for inner pipeline operation, which comprises a spiral motion main body, a guide driving wheel module, a visual inspection module and a magnetic adsorption module, the spiral motion main body is composed of a motion module and a telescopic module, and the motion module and the telescopic module are mutually linked to enable the robot to transversely extend while bending and spiral. Self-adaptive bending spiral can be carried out on the inner surfaces of pipelines with different inner diameters under the action of magnetic adsorption, then stable spiral movement with different lead angles can be carried out, the movement coverage area can be reduced by adjusting the self structure and the spiral movement lead angle, and diversified operation can be carried out by flexibly replacing and carrying various functional devices. The robot is small, light, economical, environmentally friendly, reasonable in structure, easy to control, high in operation efficiency, large and adjustable in operation range, high in damage detection rate, capable of actively avoiding obstacles, capable of transmitting and processing the situation of the inner wall of the pipeline in real time, capable of achieving automation of operation of the inner pipeline and capable of guaranteeing safety of staff and pipeline transportation.

The invention provides a circular pipeline laminar flow calculation method and system and a water supply and heat supply measuring device.The method comprises the steps that cylindrical fluid infinitesimal elements which are coaxial with a circular pipeline and equal to the circular pipeline in length are taken from the circular pipeline, and stress analysis is conducted on the cylindrical fluid infinitesimal elements to obtain a shear stress expression on the side wall of the cylindrical fluid infinitesimal elements; obtaining a differential relation between the speed and the radius according to a shear stress expression and a Newton internal friction law; integrating the differential relation according to the inner radius of the circular pipeline and the velocity of the fluid mass point on the inner wall of the circular pipeline to obtain velocity distribution; and calculating the flow based on the speed distribution according to the inner radius and the length of the circular pipeline, the pressure on the two end surfaces and the viscosity and the density of the fluid. According to the technical scheme, the technical problems that in the prior art, due to the fact that a large number of flow meters are additionally connected in long-distance pipeline transportation, the load of a transportation power source is increased, and measurement of water meters and heat meters in the water supply and heating field is inaccurate are solved.

Pipe transport and installation vehicle for a protective pipe tunnel, comprising: a vehicle body (1); Wheels (2) rotatably connected to the vehicle body (1), the number of wheels (2) being at least two; a drive device (21) connected to at least one of the wheels (2), the drive device (21) being suitable for driving the rotation of the wheel (2); a steering device (22) connected to at least one of the wheels (2), the steering device (22) being suitable for steering the wheel (2); a limiting structure (3), wherein the limiting structure (3) is suitable for connecting and receiving a pipe (8) to be arranged, and the boundary structure (3) is connected to the vehicle body (1) via a telescopic device (4); the extension of the telescopic device (4) can raise the boundary structure (3) to a height that is higher than the upper surface of the tubular pillar (9); and by shortening the telescopic device (4), the boundary structure (3) can be lowered to a height that is lower than the upper surface of the tubular pillar (9).

The utility model discloses a hoisting clamp for long pipe transportation, and belongs to the technical field of pipeline transportation. The clamp comprises a pair of clamping arms, and each clamping arm comprises an adjusting groove and a supporting pipe bracket; the connecting rod comprises a fixing rod, the two ends of the fixing rod are hinged to the clamping arms through bolts, the connecting rod further comprises an adjusting rod, and the adjusting rod is hinged to the adjusting grooves in the two sides in a sliding mode; the adjusting screw rod is arranged between the fixed rod and the adjusting rod, and a fastener is arranged outside the adjusting screw rod in a surrounding manner; and a long pipeline. According to the hoisting clamp for long pipe transportation, the clamping arms on the two sides are connected through the connecting rods, the arm unfolding angles of the clamping arms are controlled through the adjusting screw rods, the supporting pipe bracket and the jacking bracket jointly wrap a pipeline and are locked through the fastener, the truss lifting hook penetrates through the lifting hole to conduct hoisting, the clamping arms can be accurately adjusted according to the diameter of the pipeline, it is ensured that the pipeline is attached to the supporting component, and therefore the hoisting efficiency is improved. And the supporting pipe bracket and the jacking bracket adopt cambered surface design, so that the pipeline is uniformly supported, and the service life of the pipeline is prolonged.

The utility model discloses a petroleum pipeline transportation device, and relates to the technical field of petroleum engineering. The device comprises a bottom plate, fixing assemblies are arranged on the two sides of the bottom plate, and a supporting assembly is further arranged on the top of the bottom plate. Moving blocks in the fixing assemblies are movably connected to the two sides of the bottom plate, mounting shells are fixedly connected to the front and rear ends of the tops of the moving blocks, damping rods movably penetrate through the tops of the mounting shells through buffer springs, side plates are fixedly connected to the top ends of the damping rods, and arc-shaped blocks are movably connected to the peripheries of the outer walls of the sides, close to the bottom plate, of the side plates. According to the petroleum pipeline clamping device, vibration borne by a petroleum pipeline clamped by the side plates is relieved through a mounting shell, a damping rod and a buffer spring in the fixing assembly, and the problem that in the prior art, the petroleum pipeline is damaged due to the fact that road bumping is inconvenient to avoid is solved; and the petroleum pipeline can be conveniently taken down from the supporting block, and the problem that in the prior art, the petroleum pipeline is inconvenient to unload is solved.

According to the pipeline transportation carbon dioxide leakage detection and capture system provided by the invention, multiple sensors are deployed at key nodes of a pipeline to monitor environmental data in real time, and when leakage is detected according to the monitoring data, the unmanned aerial vehicle is immediately dispatched to carry out field verification; a leakage point is identified based on the infrared image data of the unmanned aerial vehicle, and the unmanned aerial vehicle is controlled to capture carbon dioxide at the leakage point; and after it is confirmed that leakage of the leakage point is effectively controlled, a maintenance processing center is notified to arrange maintenance of the leakage point and recovery of cooled carbon dioxide. According to the method, the response speed and accuracy of leakage detection can be improved, the situations of manual intervention and false alarm are reduced, and especially in a complex environment and a large-scale pipeline network, leakage points can be quickly and accurately found and processed. In addition, the system also has high flexibility and expansibility, can be modified and upgraded according to actual requirements, adapts to various operation environments and detection scenes, and improves the pipeline transportation safety.

The invention relates to a virtual energy storage characteristic modeling method for a hydrogen-doped natural gas pipeline transportation system considering pipe storage, and the method comprises the steps: S1, building a physical characteristic model of hydrogen-doped natural gas of a hydrogen transportation pipeline based on the physical properties of natural gas and hydrogen; s2, considering changes of characteristics such as pressure, permeation and attenuation of the system after hydrogen is doped into the natural gas pipeline, and considering a dynamic compression ratio to construct a compressor power consumption model, maintaining pressure balance of the hydrogen-doped natural gas pipeline, and establishing a dynamic operation characteristic model of the hydrogen-doped natural gas pipeline transportation system; s3, pipe storage is considered, a finite difference method is adopted to discretize the partial differential equation describing the flow process of the hydrogen-doped natural gas in time and space, and the operation constraint of the hydrogen-doped natural gas pipeline transportation system is constructed. According to the invention, the modeling efficiency can be improved.

The invention relates to the technical field of mechanical and electrical installation, in particular to a pipeline transportation tool and method in a limited space. The pipeline transportation tool comprises a cart, an arc-shaped containing block is installed on the cart through a rotating mechanism, a fixing mechanism is further installed on the rotating mechanism, the fixing mechanism comprises a portal frame, and the portal frame is installed on the rotating mechanism; two fixing rods are fixedly connected to the portal frame, second fixing blocks are fixedly connected to the two fixing rods, clamping arms are rotatably connected to the two ends of each second fixing block, first sliding grooves are formed in the two clamping arms, sliding blocks are jointly slidably connected into the two first sliding grooves, and clamping assemblies are installed on the sliding blocks and the clamping arms. A power assembly is further installed on the portal frame and connected with the sliding block. The pipeline transportation device has the advantages that pipeline transportation in a limited space is achieved, a large amount of manpower consumed by manual carrying is reduced, and the probability of easy overturning is reduced.

The utility model relates to the technical field of pipeline transportation, in particular to a pipeline transportation device. Comprising a tractor connected with a trailer, the upper end of the front side of the trailer is higher than the upper end of the rear side of the trailer, a driving device is arranged on the front side of the trailer, two rope wheels are fixed to the driving device, steel wire ropes are wound around the rope wheels, one ends of the steel wire ropes are fixedly connected with the rope wheels, and the other ends of the steel wire ropes are closed rope rings. A groove corresponding to the rope wheel is formed in the upper end of the trailer and extends in the width direction of the trailer, a plurality of mounting grooves are formed in the upper end of the rear side of the trailer, swing rods are rotationally connected into the mounting grooves and comprise supporting parts, guiding parts perpendicular to the supporting parts are fixed to the rear ends of the supporting parts, and the guiding parts extend upwards. Through the design of the guide part of the rotatable swing rod, when a pipeline is dragged to a trailer or unloaded by a steel wire rope, the swing rod automatically adjusts the angle to form a slope guide surface, and the swing risk of the pipeline in traditional hoisting is avoided.

This invention relates to the field of wellhead operation technology and is a rod transfer device for transferring rod-like parts. It includes a first tube body, a second tube body, a triggering component, and mounting connectors. The first and second tube bodies are hinged together, and a through-passage is formed between the inner walls of the first and second tube bodies. A power component is provided between the first and second tube bodies to open and reset them around the hinge. When the power component opens, it moves the second tube body relative to the first tube body to an open state. In the open state, the lower parts of the second and first tube bodies form a slip opening at the open point that communicates with the through-passage. This invention can transport sucker rods with various end connections, such as those with couplings, rod bodies, or straightening blocks, and allow them to fall onto the sucker rod bracket of the pipeline transport platform in a rear-end aligned state, facilitating subsequent automated transport operations. It is easy to manufacture and use.

The utility model relates to the technical field of pipe gallery construction, in particular to an underground water pipe gallery pipeline transportation device which comprises pipeline supports and a conveying mechanism installed on the pipeline supports, and the conveying mechanism comprises end conveying units located on the pipeline supports at the two ends and a middle conveying unit located on the middle pipeline support. The end conveying unit comprises two first rollers rotationally arranged in a V shape, the middle conveying unit comprises a second roller rotationally arranged in a linear shape, and the pipeline is supported on the first rollers and the second rollers in a rolling mode. A pipeline is conveyed through rolling of a first roller and a second roller, and the two first rollers in the end conveying unit are arranged in a V shape so that the pipeline can be conveniently limited to move left and right, and the stability of the pipeline in the moving process is guaranteed; a second roller in the middle conveying unit is arranged in a straight line shape so that the pipeline can be conveyed horizontally. The transportation efficiency during pipeline installation is effectively ensured, and meanwhile, the damage to the pipeline is reduced; the device is convenient to manufacture and process and low in cost, and materials can be obtained on site.

The invention relates to the technical field of water conservancy machinery, and discloses a high-position pool submersible pump segmented pipe disassembly type push-pull maintenance trolley system which comprises a base used for overall supporting of the push-pull maintenance trolley system. The trolley mechanism is used for supporting movement of the pipeline; the sliding rail is used for supporting the trolley mechanism to move and is mounted on one side of the base; the taking and placing mechanism is used for taking and placing the pipeline, comprises a clamping mechanism and a moving mechanism and is mounted at the top of the sliding rail; and the limiting mechanism is used for limiting the moving distance of the pipeline and is mounted in the sliding rail. In the push-and-pull maintenance trolley system, a pipeline can be fixed through the clamping mechanism, then the pipeline is disassembled, then the air cylinder drives the connecting frame to drive the storage disc to move, and therefore the clamping mechanism on the fixing frame is driven to move and take down the pipeline, and similarly, the pipeline can be conveyed to the trolley mechanism and installed and fixed; and automatic disassembly and assembly of the pipeline are achieved, and the convenience of pipeline assembly and disassembly is improved.

The invention provides a factory-like rapid construction method for an underground long rigid pipeline, a plurality of underground factory units are planned and excavated along a pipeline line at intervals, each underground factory unit comprises an assembling unit and a traction unit, and the adjacent underground factory units are connected through a foundation pit; a travelling crane is arranged in the assembly unit, a traction system is arranged in the traction unit, an assembly jig frame is arranged in the foundation pit, and an underground factory greenhouse is installed above each underground factory unit and the foundation pit; the pipeline transport vehicle transports the pipeline sections into the assembling units, the travelling crane hoists the pipeline sections to the assembling jig frame, and all the pipeline sections are welded to form a pipeline with the designed length; the welded pipeline is driven by a traction system and assisted by a lifting type sliding support to move to a traction unit along the foundation pit; and then welding with a subsequent pipe section to form a continuous pipeline. The problems that underground long rigid pipelines are low in construction efficiency, installation precision and construction quality are solved.

This utility model discloses an auxiliary equipment for the transportation and installation of building pipelines, relating to the field of pipeline construction technology. It solves the problems of inconvenient transportation and installation of building pipelines in existing technologies. It includes at least two towing trolleys, each trolley comprising self-locking casters, two movable wheels, a pipeline placement groove, and fastening structures opposite each other on both sides of the groove. The fastening structures include support rods, screws, a top plate, and an arc-shaped clamping plate. The support rods are mounted on the trolley frames and have screw holes. The arc-shaped clamping plate has a receiving chamber with a through hole, the size of which is smaller than the size of the top plate. The fixed end of the screw spirally passes through the screw hole and slides through the through hole, and is fixedly connected to the top plate. This auxiliary equipment for the transportation and installation of building pipelines is used for the transportation and auxiliary installation of building pipelines, enabling convenient and safe transportation of pipelines with low labor intensity, while providing support and assistance for pipeline installation, thus improving pipeline installation efficiency.

The invention relates to the technical field of pipelines, discloses a turbulence inhibitor of airflow, preparation and application of the turbulence inhibitor and a gas conveying method, and aims to solve the problem of over-high energy consumption caused by pipeline friction resistance in pipeline transportation of gas. The turbulence inhibitor comprises microparticles, the length of the microparticles is larger than or equal to eta and smaller than or equal to Lx, and Lx is the turbulence integral scale; eta is the Kolmogorov scale, eta = (v3 / epsilon) 1 / 4, and v is the kinematic viscosity of the airflow; epsilon is the turbulent flow energy dissipation rate. The turbulence inhibitor has the advantages of being high in applicability, excellent in drag reduction effect, economical, capable of saving energy and the like.

The novel pipe conveying machine comprises a vehicle body, crawler belt assemblies are arranged on the two sides of the vehicle body, clamping mechanisms used for clamping and fixing a conveying pipeline are arranged on the two sides of the surface of the vehicle body, and each clamping mechanism comprises a mounting support, a main arm, a clamp and a movable arm; mounting supports are fixedly arranged on the two sides of the surface of the vehicle body and located at the upper ends of the crawler belt assemblies, main arms are hinged to the interiors of the mounting supports through pin shafts, clamps are hinged to one ends of the main arms through pin shafts, and movable arms are hinged to the surfaces of the clamps through pin shafts. According to the novel pipe conveying machine, the stability of mountain pipeline conveying can be guaranteed, meanwhile, the transformation and control method of remote control operation is improved and disclosed, the operation risk is greatly reduced, and the novel pipe conveying machine is more suitable for being used in the complex environment.

The utility model relates to conveying equipment of a hydrogen conveying pipeline, which comprises a placing seat, the left and right parts of the placing seat are in threaded connection with front and back symmetrical lead screws, the lead screws are in rotary connection with clamping plates, the clamping plates are in sliding connection with the placing seat, and the lower part of the placing seat is in sliding connection with a base. Springs are connected between the left and right parts of the base and the lower part of the placing seat, buffer assemblies are connected between the upper sides of the left and right parts of the base and the placing seat, the left and right parts of the base are movably connected with sliding threaded sleeve rods, and threaded rods are mounted on the front sides of the left and right parts of the base. According to the device, shaking borne by the placing base is relieved through the buffering assembly, meanwhile, the springs can absorb part of impact borne by the placing base, the vibration reduction effect is further achieved, damage caused by violent shaking of the hydrogen conveying pipeline is avoided, the sliding threaded sleeve rod is connected with the other corresponding threaded rod in a threaded mode, splicing work of a plurality of devices is completed, and the splicing efficiency is improved. Therefore, the transportation requirements of hydrogen transportation pipelines with longer specifications can be met.

The invention discloses a method for stably conveying dangerous chemicals, which is characterized in that a buffer is additionally arranged on a dangerous chemical conveying pipeline, the buffer comprises a shell, a gas filling port and a pressure gauge, and an air bag device with pressure is arranged at the upper part in the shell; inert gas is used in the air bag, the outer portion of the air bag makes contact with hazardous chemicals, when the pressure in the hazardous chemical pipeline rises, the air bag shrinks, and after the pressure is reduced, the air bag expands, so that the pressure relief effect on the hazardous chemical pipeline is achieved, meanwhile, the buffering effect on pipeline transportation is achieved, and the water hammer effect of the pipeline is reduced; and the hazardous chemical substance conveying pipeline is protected. The method has the characteristics of convenience in operation, low manufacturing cost, low later maintenance cost, no waste gas, safety, environment friendliness and the like; nitrogen is used as buffer gas, the usage amount is small, the operation cost is low, the using process is relatively safe, and the risk of dangerous chemical leakage is reduced.

The invention discloses a long-tunnel large-diameter PCCP (prestressed concrete cylinder pipe) transportation, installation and construction method, relates to the technical field of water conservancy and civil engineering construction, is suitable for installation and construction of a PCCP in a tunnel and a narrow space, and comprises the following steps: step 1, finishing hoisting, transportation, adjustment and centering installation of the PCCP in the tunnel by adopting a beam-carrying type pipeline transportation and installation vehicle; secondly, after the PCCP is installed, self-leveling concrete or self-compacting concrete is backfilled through the pumping or relay pumping technology, and a gap between the outer wall of the PCCP and the inner wall of the tunnel is backfilled; the piggyback type pipeline transportation and installation vehicle is selected, has the functions of walking, bearing, hoisting and precise positioning, and can flexibly work in tunnels and narrow and small spaces. Compared with traditional construction equipment, the vehicle can rapidly complete hoisting, transportation, adjustment and centering installation of the pipeline, and the connection time of all construction links is shortened.

The invention relates to the technical field of tunnel construction mechanical equipment, and discloses a tunnel pipe transport vehicle which comprises a double-end transport vehicle, and pipelines are transported in a tunnel through the double-end transport vehicle. The platform bottom plate is fixed on the double-end transport vehicle and is used for bearing an upper structure; the supporting mechanism can rotate on the platform bottom plate to change the position; the telescopic mechanism is arranged on the supporting mechanism and used for bearing the pipeline; the dismounting mechanism is used for mounting the fixing mechanism; the fixing mechanism is detachably mounted on the dismounting mechanism and used for fixing the pipeline from the outer side; and the driving assembly is used for driving the fixing mechanism to rotate. By arranging the supporting mechanism capable of rotating on the platform bottom plate and the telescopic mechanism, the horizontal position and height of a supported pipeline can be conveniently adjusted by the pipeline conveying vehicle; and in combination with stable driving provided by the hydraulic cylinder, the transportation requirements of pipelines with different diameters and different mounting positions in a tunnel can be flexibly met, and the universality and the field adaptability of the vehicle are improved.

The present invention relates to an underwater mixed pipeline damage simulation experimental device, comprising: a pipeline medium simulation system, an underwater damage simulation system and a data acquisition system; the pipeline medium simulation system is used to simulate pipelines for transporting oil, gas, and oil-gas mixed media; the underwater damage simulation system is used to simulate damage to pipelines for transporting oil, gas, and oil-gas mixed media; the data acquisition system is used to collect test data under normal conditions and when the pipeline is damaged. The present invention relates to an underwater mixed pipeline damage simulation experimental method, which summarizes the flow characteristics and laws of the mixed medium when the underwater mixed pipeline is damaged based on the experimental data. The present invention can be used to measure the consequences of damage such as small hole leakage, pipeline rupture and even pipeline breakage. The pipeline can be used as a gas pipeline, an oil pipeline and an oil-gas mixed pipeline for multiple experiments; the operation is simple, and the state of the medium in the water after the pipeline is damaged can be truly reflected.