1396results about "Pipe heating/cooling" patented technology

A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period. The cycler may also be configured to have a heater control system that monitors both the temperature of a heating tray and the temperature of a bag of dialysis fluid in order to bring the temperature of the dialysis fluid rapidly to a specified temperature, with minimal temperature overshoot.

The present application belongs to the technical field of mass concrete construction, and aims to solve the problem of high thermal resistance and slow heat dissipation of traditional cooling pipe laminar bottom layer, and discloses a gravity dam construction cooling water pipe based on destruction of laminar bottom layer and a method thereof. The cooling water pipe comprises a plurality of series water pipe units, each water pipe unit comprises a steel pipe, a flexible spring hose is arranged in the steel pipe, and the spring hose forms a spiral protruding turbulence structure along the inner wall of the steel pipe; the hose is fixed by pointwise anchoring and outer wall surface bonding with glue, and a ring is arranged at both ends for limiting and assisting turbulence. The present application breaks through the thermal resistance of laminar bottom layer, greatly improves the hydration heat conduction efficiency, is convenient to construct and has durable structure, and is suitable for mass concrete temperature control requirements.

The invention discloses an efficient anti-freezing and anti-blocking integrated induction heating system and method for an oil and gas pipeline, belongs to the technical field of anti-freezing and anti-blocking of oil and gas pipelines, and aims at solving the problems that in the prior art, heating efficiency is low, energy consumption is huge, heating uniformity and adaptability are poor, the system integration degree is low, and the intelligent degree is insufficient. Comprising the steps of S1, induction heating unit arrangement and power management; s2, real-time temperature monitoring and data acquisition; s3, intelligent data analysis and precise heat management; the electromagnetic induction heating principle is adopted, the induction coil directly heats the pipeline and the internal medium, heat conduction loss and heat energy radiation loss of heating modes such as traditional resistance wires and heat tracing bands are reduced, the intelligent power management module can optimize power supply and power adjustment, and the self-adaptive environment and load adjustment strategy is combined, so that the self-adaptive load adjustment is achieved. The heating power can be automatically adjusted according to the environment temperature and the pipeline load, the anti-freezing and anti-blocking effect is guaranteed, meanwhile, energy consumption is remarkably reduced, and the burden of an electric power supply system is relieved.

The invention discloses a hydrogen storage and transportation system under a wind-solar hydrogen production project and a control method. The hydrogen storage and transportation system at least comprises a hydrogen flowing pipeline and a water flowing pipeline, the hydrogen flowing pipeline at least comprises a first compressor, a low-pressure hydrogen storage container, a third compressor and a second heat exchanger which are connected in sequence; the first compressor is further sequentially connected with a second compressor, a high-pressure hydrogen storage tank, an eighth valve connected with the pressure reducing valve in parallel and a third compressor; the second compressor, the high-pressure hydrogen storage tank and the low-pressure hydrogen storage container are connected in parallel; the high-pressure hydrogen storage tank is connected with the pressure reducing valve through a ninth valve connected with the third compressor in parallel; the first compressor pressure is smaller than the third compressor pressure and smaller than the second compressor pressure; the water flow pipeline at least comprises a first heat exchanger, a first water pump and a second water pump which are sequentially arranged in the water flow direction. The second water pump is in fluid communication with the second heat exchanger; the first heat exchanger is arranged on the cooling water pipeline corresponding to the compressor. The multi-aspect requirements of stable output, efficient storage, energy conservation, environmental protection and the like can be met.

This invention provides a jacketed multi-way plunger device and its application, belonging to the field of pipeline engineering design. The jacketed multi-way plunger device includes a first plunger valve and a second plunger valve; a first pipeline is vertically connected to the end of the first plunger valve, and a second pipeline is obliquely connected to the first plunger valve; a third pipeline is vertically connected to the end of the second plunger valve, and the first pipeline and the second plunger valve are obliquely connected. This invention integrates the first and second plunger valves into one unit through the pipeline arrangement, achieving both pipeline shut-off and flow functions, while simultaneously enabling continuous material feeding.

The invention belongs to the technical field of gravity dam construction, and provides an assembled concrete cooling pipe structure and method for gravity dam construction. The cooling pipe is composed of a plurality of pipe body units connected in series, and lining pieces are arranged in metal pipes of the pipe body units. The lining piece and the elastic steel sheets form a criss-cross cage type structure through the strip-shaped plates, the strip-shaped plates are provided with pitted surfaces and notches, the steel sheets can stretch out and draw back to achieve variable-diameter adjustment, and water flow can be forced to generate turbulent flow to damage the laminar flow bottom layer. The method comprises the steps of raw material pretreatment, notch and pitted surface machining, lining piece assembling, metal pipe assembling and fixing and pipe body unit series connection. The structure is stable, manufacturing is convenient, boundary layer thermal resistance can be reduced, heat transfer efficiency is improved, concrete temperature cracks are reduced, and the gravity dam construction requirement is met.

The invention relates to the technical field of pipeline electromagnetic heating, in particular to a three-phase mixed transportation glass fiber reinforced plastic pipeline electromagnetic heating device which comprises a glass fiber reinforced plastic pipeline, a control module and a plurality of heating plates fixedly installed on the inner side of the lower portion of the glass fiber reinforced plastic pipeline at intervals in the length direction. A plurality of electromagnetic coils are fixedly mounted at intervals below the glass fiber reinforced plastic pipeline corresponding to the positions of the heating plates in the length direction, and each electromagnetic coil is wound by a plurality of circles. The heating device is reasonable and compact in structure, alternating current can be provided for the electromagnetic coil by arranging the control module, the power of the electromagnetic coil can be controlled, and after the electromagnetic coil is electrified, the alternating current generates an alternating magnetic field to act on the wavy heating plate, so that fluid in the glass fiber reinforced plastic pipeline is heated; compared with a traditional method that an electromagnetic coil is spirally wound on the outer side of the pipeline, the installation mode is simpler, the installation cost is low, meanwhile, the distance between the electromagnetic coil and the heating plate is closer, the heating effect is better, and the electromagnetic heating efficiency is improved.

The invention provides a pipeline gas cooling sleeve device and a using method, and belongs to the technical field of pipeline gas cooling, the pipeline gas cooling sleeve device comprises an upper shell and a lower shell, the upper shell and the lower shell are arranged on the outer side of a gas outlet pipeline in a sleeving mode, a cooling cavity is formed between the upper shell and the lower shell, and a cold water inlet pipe and a cold water outlet pipe are arranged at the top of the upper shell; the cold water inlet pipe and the cold water outlet pipe are both communicated with the cooling cavity; a plurality of buckle assemblies are arranged on the two sides of the upper shell, locking assemblies are arranged on the two sides of the lower shell, the upper shell and the lower shell are connected through the buckle assemblies and the locking assemblies, and a sealing assembly is arranged between the upper shell and the lower shell. Stable connection of the cooling sleeve can be achieved, looseness caused by vibration or thermal deformation is avoided, and meanwhile the sealing performance of the cooling sleeve is guaranteed.

The invention discloses a deep sea polymetallic nodule boiling type lifting system which comprises a collecting platform on the sea surface and a relay station suspending in the sea, the relay station is communicated with the collecting platform through a pipeline, the pipeline comprises a plurality of sections of lifting vertical pipes, and every two adjacent sections of lifting vertical pipes are connected through a boiling type heating device. The boiling type heating devices are the same in structure. The lifting system disclosed by the invention integrates the technical characteristics of the existing pipeline conveying technology, and is simple in structure and high in reliability. Liquid phase vaporization is used as a gas phase source in a pipeline, a boiling type heating device with a metal heating pipe and a heat insulation layer is directly connected with a lifting vertical pipe, and meanwhile, a plurality of sections of boiling type heating devices are arranged in the pipeline, so that the stability of providing gas phase power is ensured.

The invention relates to the technical field of waste oil heating, in particular to an electromagnetic heating system of a waste oil conveying pipeline, and aims to solve the problem that in the prior art, the heating temperature of waste oil is not uniform, and coking is easily generated in the pipeline. Comprising an oil reservoir; the oil delivery pipe is communicated with the oil storage pool, and the bottom of the oil delivery pipe is communicated with an oil discharge pipe; a heating coil; the decoking mechanism is coaxially arranged in the oil conveying pipe, and the end, away from the oil storage pool, of the decoking mechanism is connected with a driving mechanism; wherein the heating coil is used for uniformly heating the oil conveying pipe, and the driving mechanism is used for driving the decoking mechanism to reciprocate along the axis direction of the oil conveying pipe or driving the decoking mechanism to rotate along the circumferential direction of the oil conveying pipe. The heating coil wound on the peripheral wall of the oil conveying pipe can uniformly heat oil in the oil conveying pipe, coking caused by local overheating is avoided, meanwhile, the decoking mechanism can continuously enable the oil in the oil conveying pipe to flow, and coking caused by the fact that the oil stays in a certain area for a long time is avoided.

The present invention is a cover body configured to cover an object, including: an inner layer part disposed on a side closer to the object; an outer layer part disposed on a side further from the object; an inner-layer-side heat insulating member disposed on an outer layer part side of the inner layer part; an outer-layer-side heat insulating member disposed on an inner layer part side of the outer layer part; a heat generating element disposed between the inner-layer-side heat insulating member and the outer-layer-side heat insulating member; a sheet configured to provide a stepped part on a side further closer to the object of the inner layer part; and a thermocouple provided on a side further closer to the object of the stepped part.

A thermal disinfection system, and related of method of use and manufacture, is implemented with a liquid-carrying conduit associated with a given plumbing system applicable with a given environment. The thermal disinfection system may include a heating device configured for thermal contact with at least a portion of the liquid-carrying conduit, thereby defining a thermal contact region of the liquid-carrying conduit. Additionally, a thermal insulating layer may disposed on the heating device. The heating device may be configured to heat (or heat and dry) a lumen defined by the liquid-carrying conduit along the thermal contact region (in whole or in part) to a specified temperature to prevent (e.g., suppress) or inhibit (e.g., reduce) microbial activity from advancing through the lumen defined by the liquid-carrying conduit.

The present invention provides a monitoring system comprising: a sensor which is provided in a pipe for connecting a demand end and a supply end of a fluid and which collects sensing information related to the pipe; a receiving unit which is connected to the sensor and which receives sensing information from the sensor; a control unit for outputting a temperature value of the fluid by using the sensing information through calibration; a heating cable which is provided in the pipe, and which heats the pipe on the basis of the temperature value of the fluid; an HMI module, which uses a graphic model related to a pipe system including a plurality of pipes, so as to display the temperature value of the fluid and a change, due to heating, in the temperature value of the fluid; and a display for outputting the graphic model. According to the present invention, the temperature of the fluid can be controlled using the heating cable through monitoring of heat tracing based on an optical fiber sensor.

The utility model discloses an alkane storage tank precooling system which comprises a normal-temperature pressure storage tank and a low-temperature normal-pressure storage tank which are communicated through a conveying pipeline, the conveying pipeline leads to the low-temperature normal-pressure storage tank from the normal-temperature pressure storage tank, a decompression flash evaporation device is arranged on the conveying pipeline, and a tank inlet pipeline in the conveying pipeline after decompression is a precooling pipeline. A spray head is arranged at an output port of the pre-cooling pipeline and is arranged above an inner tank of the low-temperature normal-pressure storage tank. Low-temperature propane / low-temperature butane gas is not received from the transport ship to carry out gas-phase precooling on the low-temperature propane / butane normal-pressure storage tank, low-temperature liquid-phase propane / low-temperature liquid-phase butane is not output by a cabin sweeping pump to carry out liquid-phase precooling on the low-temperature propane / butane normal-pressure storage tank, and precooling of the low-temperature propane / butane normal-pressure storage tank is completed before the overseas transport ship berths. The pre-cooling process is not influenced by weather, tide and other environmental factors, and operation is more stable; the outer wheel parking cost is not generated, wharfs are not involved in the pre-cooling process, dispatching and operation are limited to a reservoir area, and if emergencies are small in wave range, processing is more timely.

The utility model discloses an assembly type low-specific-friction low-air-leakage ventilation pipeline, and relates to the technical field of ventilation air pipes. The utility model comprises pipe joints which are spliced end to end; the pipe joint comprises an outer shell and an inner shell which are coaxially arranged in a sleeved mode, and the inner wall of the outer shell is attached to the outer wall of the inner shell. A first annular groove surrounding the axis of the outer shell is formed in the middle section of the inner wall of the outer shell, second annular grooves surrounding the axis of the outer shell are formed in the two ends of the inner wall of the outer shell, and one side of each second annular groove penetrates through the end of the outer shell. A cooling filling cavity is formed between the outer wall of the inner shell and the first annular groove in a surrounding mode, the outer wall of the inner shell and the two second annular grooves form a first sealing filling cavity and a second sealing filling cavity respectively, and the first sealing filling cavity and the second sealing filling cavity of the other pipe joint are spliced to form a sealing cavity. The purposes that the air pipe can be conveniently assembled, the sealing performance is excellent, and meanwhile the air pipe has low specific friction resistance and good flame retardant performance are achieved.

A method and system for Direct Electrical Heating of a Pipe-In-Pipe pipeline for transporting fluids includes mechanically connecting the steel inner shell to the steel outer shell at different intervals of the pipeline, establishing an electrical and thermal insulation between the inner shell and the outer shell, applying an alternating electric current between an outer surface of the inner shell and an inner surface of the outer shell over the entire length of the pipeline so as to heat the inner shell of the pipeline by Joule effect, and placing on the outer surface of the inner shell at least one layer made of resistive and ferromagnetic material so as to increase the ratio of electric power transmitted to the inner shell.

This invention discloses an electric heat tracing laying device and its usage method for marine fuel oil pipelines, belonging to the field of electric heat tracing technology. The electric heat tracing laying device for marine fuel oil pipelines includes a traveling frame, and further includes: a traveling assembly mounted on the traveling frame for driving the traveling frame to move axially along the pipeline; the bottom of the traveling frame has an opening for the pipeline to enter; a rotating seat rotatably mounted on the traveling frame, on which an electric heating tape shell is mounted, and the electric heating tape shell releases the electric heat tracing tape outward through a discharge port; and a driving unit mounted on the traveling frame and connected to the traveling assembly. This invention replaces manual labor with mechanical automation, realizing the entire process of spiral winding of the electric heating tape, laying of the aluminum foil tape heat-conducting layer, and segmented fixing of the pressure-sensitive tape, solving the problems of low efficiency and insecure fixing in traditional methods, and significantly improving the safety and maintenance efficiency of marine fuel oil pipelines in low-temperature environments.

The invention relates to the technical field of pipelines, in particular to a broiler farm fire-fighting water supply and drainage pipe which comprises a main body, an inner ring, an outer ring and a driving device, the inner ring is arranged in the main body and used for cleaning the inner wall of the main body, the inner ring comprises a movable ring, a fixed ring and a magnet block, and a roller abutting against the inner wall of the main body is embedded in the fixed ring; a ball forming a spherical pair with the movable ring is embedded in the movable ring, the fixed ring is located at the end of the movable ring and forms a rotating pair with the movable ring, the ball abuts against the inner wall of the body, the magnet block is installed on the movable ring, the outer ring is arranged on the outer side of the body in a sleeving mode, and an electromagnet is installed on the outer ring and attracts the magnet block after being powered on. The cleaning device is simple in structure, foreign matters on the inner wall of the main body can be cleaned without dismounting a pipeline and stopping water flow, the foreign matters on the inner wall of the main body are cleaned through mutual cooperation of the outer ring and the inner ring, and normal water supply or drainage can be prevented from being affected by cleaning operation.

A distributed low energy dynamic thermal management system for solid matter prevention and control in oil and gas transportation pipeline includes a pipeline data monitoring terminal, a current and an electric pulse control terminal, a land console, an electric heating terminal, a wiring flange, an oil and gas transportation pipeline, a valve structure. The system monitors the state of the pipeline in real time by the pipeline data monitoring terminal, and transmits the monitoring data to the current and electric pulse control terminal in real time, the current and electric pulse control terminal produces different thermal responses to the electric heating terminal according to the state in the tube, raises the temperature inside the tube by generating a continuous current, unblocks pipeline by generating high power electric pulse, so as to realize real-time monitoring and local temperature dynamic control of oil and gas transportation pipeline.

The invention discloses an automatic heating device for preventing a sealing gasket of sulfur hexafluoride electrical equipment from cracking at low temperature, which relates to the technical field of insulating gas electrical equipment heating and comprises a temperature sensor, a heat tracing band, a heat insulation film, a heating controller and a temperature data collector. The flange joint of the sulfur hexafluoride electrical equipment is wrapped with a heat insulation film and a heat tracing band, a temperature sensor is arranged in an inner cavity of the automatic heating device, the heat tracing band is electrically connected with a heating controller, the temperature sensor is connected with a temperature controller, and the heating controller and the temperature controller are controlled by a heating temperature control automatic controller; the connecting flange part of the sulfur hexafluoride electrical equipment is wrapped by the automatic heating device, and the heating and temperature control process is automatically operated, so that the low-temperature cracking of a sealing gasket at the flange of the sulfur hexafluoride electrical equipment is avoided, the gas leakage phenomenon in the sulfur hexafluoride electrical equipment is avoided, the potential safety hazard of the equipment is eliminated, and the safety of the equipment is improved. And workers only need to inspect regularly, so that the workload of the workers is greatly reduced.

The utility model discloses a pipeline thermal insulation sleeve, which relates to the technical field of pipeline thermal insulation and comprises a main pipe body and a sheath structure, a first magic tape is attached to the outer surface of the main pipe body, and the sheath structure is arranged on one side, far away from the main pipe body, of the first magic tape. The jacket structure comprises a jacket body, first tightening structures, a rope releasing assembly and a controller, the two first tightening structures are installed on the outer surface of the jacket body, the rope releasing assembly is arranged below the two first tightening structures, and the controller is arranged in the center of the two first tightening structures. When heat preservation is conducted on the pipeline, the situation that the sheath structure slides along the main pipeline due to the shape of the pipeline when the sheath structure is attached to the main pipeline is avoided, meanwhile, when the sheath structure is in the bent shape of the pipeline, the connected sheath structure can be closed through the butt joint belt, and therefore gaps of the bent pipeline area are reduced.

The invention discloses a cold region tunnel drainage pipe anti-crystallization system based on an alternating electric field. The cold region tunnel drainage pipe anti-crystallization system comprises a tunnel body, an annular blind pipe, a radial water guide pipe, a transverse drainage pipe, a conical sediment sedimentation tank and an electric field generation device. The outer walls of the annular blind pipe and the radial water guide pipe are wrapped with titanium alloy net-shaped partition electrodes, alternating voltage with the phase difference of 90 degrees is output through the phase controller to form an alternating electric field, and salt ions are disturbed to inhibit crystal nucleus generation. The electrodes have a heating function, so that positive temperature in the pipe can be realized; auxiliary electrodes are arranged at connecting ports of the annular blind pipe, the radial water guide pipe and the transverse drainage pipe to fill the electric field blind area; the conical sediment sedimentation tank reduces sediment deposition through vibration desilting and an anti-crystallization coating. The system is linked with the temperature and conductivity sensors through the master controller, dynamically adjusts the electric field frequency and the heating power, and adapts to the high-salt and low-temperature working conditions in the cold region. The complex problems of whole-area crystallization prevention and low-temperature icing prevention of the tunnel drainage system in the cold region can be solved.

The utility model provides skid-mounted CNG (compressed natural gas) pressure reducing equipment, which is integrally provided with a heat tracing device, a pressure reducing device and a control device and comprises a first gas inlet, a second gas inlet, a third gas inlet and a fourth gas inlet, the second air inlet is used for being connected with an external air source; the first air inlet is connected with an air inlet of the heat tracing device through a first stop valve, and the second air inlet is connected with the air inlet of the heat tracing device through a second stop valve; an outlet of the heat tracing device is connected with an air inlet of the pressure reducing device, the pressure reducing device comprises a first pressure regulating unit, a second pressure regulating unit and a third pressure regulating unit which are sequentially connected, the second pressure regulating unit comprises a first pressure regulating outlet, and the third pressure regulating unit comprises a second pressure regulating outlet. A pressure reducing device, a control device and a heat tracing device are integrated into a pry, and a gas storage device can also be integrated, so that the occupied area of equipment and the investment cost of the equipment are reduced.

The invention relates to the technical field of power plant gas pipeline jacket installation, in particular to a gas pipeline jacket structure and a working method. The first gas inner pipe and the second gas inner pipe are welded together, the first heat tracing jacketed pipe is arranged outside the first gas inner pipe, and the second heat tracing jacketed pipe is arranged outside the second gas inner pipe. And a jumper pipe is arranged between the tail of the first heat tracing jacketed pipe and the head of the second heat tracing jacketed pipe in a communicating mode, a steam inlet is further formed in the first heat tracing jacketed pipe, and by adjusting the positioning plate, steam can flow into a next pipeline from the jumper pipe more efficiently.

A plural component dispensing system includes a first heated hose, a second heated hose, a controller, and a dispensing device. The first heated hose and the second heated hose include electrical wires that supply heat to the first and second heated hoses to heat fluid components within the first and second heated hoses. The first and second heated hoses are electrically coupled to the controller and are fluidly coupled to the dispensing device. The controller is configured to control and alternate the electrical power supplied to the first heated hose and the second heated hose to heat the first heated hose independent of the second heated hose.

The invention relates to an electric heat tracing pipe convenient to connect, and relates to the technical field of heat tracing pipes, the electric heat tracing pipe convenient to connect comprises a group of annular plates, an inner pipe and an outer pipe are fixedly arranged between the annular plates, the outer pipe sleeves the inner pipe, an electric heating layer is arranged between the outer pipe and the inner pipe, an insulating sleeve is detachably arranged on the annular plates, the insulating sleeve and the inner pipe are communicated with each other, and the electric heating layer is arranged between the outer pipe and the inner pipe. A sealing assembly is arranged between the insulating sleeve and the inner pipe, the sealing assembly is used for sealing the insulating sleeve and the inner pipe, a series connection assembly and a parallel connection assembly are arranged in the insulating sleeve, the series connection assembly is used for connecting the electric heating layers which are oppositely arranged in series, and the parallel connection assembly is used for connecting the electric heating layers which are oppositely arranged in parallel. The electric tracing pipe connecting structure has the effects of facilitating connection of the electric tracing pipe and reducing the circuit laying work amount.

This application provides a liquid-source gas-phase transport system and method, relating to the semiconductor field. The liquid-source gas-phase transport system includes a storage device, a reaction device, and a transport pipeline. The storage device includes a container and a container heating assembly, which heats the container to vaporize the liquid raw material within it. The transport pipeline connects the container and the reaction chamber of the reaction device. The transport pipeline includes an inner tube, an outer tube sleeved around the inner tube, and a pipeline heating assembly disposed outside the outer tube. A protective gas is filled between the outer and inner tubes, and the interior of the inner tube is used to transport the gaseous raw material. The liquid-source gas-phase transport system and method provided in this application can uniformly heat the raw material, reducing the likelihood of condensation and particulate contamination. Furthermore, the liquid-source gas-phase transport system and method offer superior safety.

The utility model provides an auxiliary device for installing a pipeline in a narrow space, belongs to the technical field of building construction, and provides the following technical scheme mainly aiming at the problem that the pipeline is difficult to be heated uniformly when the existing water pipeline is heated, softened and butted. Comprising two sets of mounting frames, sliding through grooves are formed in one sides of the two sets of mounting frames, two sets of clamping jaws are slidably mounted in the two sets of sliding through grooves correspondingly, a first mounting groove is formed in the top of one set of clamping jaws, a heater is mounted in the first mounting groove, one side of the heater makes contact with a vapor chamber, and the other side of the heater makes contact with the vapor chamber. By combining the heater with the clamping jaw, the auxiliary device for installing the pipeline in the narrow space can uniformly heat and soften the water pipe, can also adapt to water pipes of different sizes, and solves the problems that when an existing water pipe is heated, it is difficult to ensure that the pipeline is uniformly heated, and the pipeline is not uniform in heating. And construction by operators is not convenient.

The utility model relates to the technical field of conveying pipeline protection, and discloses a pipeline external protection mechanism in an extreme environment, which comprises a pipeline, two groups of mounting flanges and a protection component. According to the pipeline external protection mechanism in the extreme environment, the outer side of the pipeline is sleeved with a set of sleeves, the two ends of the sleeves achieve sealing of the contact portions of the pipeline and the sleeves through sealing assemblies, temperature loss caused by air convection is reduced, meanwhile, through the multiple sets of annular pipes in the pipeline and argon filled in the annular pipes and the heat preservation cavity, the temperature loss caused by air convection is reduced; meanwhile, through supporting and shaping of the annular pipe, it is guaranteed that the whole sleeve is not prone to deformation, the annular groove formed in the outer side of the sleeve can guide rain and snow accumulated at the top end of the sleeve to flow downwards, the rain and snow are prevented from being accumulated at the top of the pipeline, and the service life of the sleeve is prolonged. And therefore, the safe use performance of the whole pipeline under extreme climate conditions is improved.

According to the technical scheme, the composite seamless nickel alloy pipe comprises an alloy pipe and a graphene heating belt, a heating groove is formed in the portion, close to the inner surface, of the interior of the alloy pipe, the graphene heating belt is installed in the heating groove, and heat preservation tinfoil is arranged on the portion, located on the outer surface of the graphene heating belt, of the interior of the heating groove. A heat preservation groove is formed in the alloy pipe close to the outer surface, a vacuum groove A is formed in the alloy pipe and located in a gap between the heating groove and the heat preservation groove, and a vacuum groove B is formed in the alloy pipe and located at the top of the vacuum groove A. The composite seamless nickel alloy pipe for petroleum transportation solves the problems that when an existing seamless steel pipe for petroleum transportation is used in a low-temperature environment, petroleum is prone to being supercooled under the influence of external cold air, the viscosity of the petroleum is increased, and the petroleum transportation efficiency is reduced, the condensation probability of the petroleum is reduced, and therefore normal transportation of the petroleum is guaranteed.