6640results about "Rigid pipes" patented technology

A coupling device for conveying cryogenic fluid which is separable in the event of an emergency and is automatic-closing, the device comprising: two pipes for conveying fluid that extend in a longitudinal direction and each comprise, at a connection end, a valve mechanism that is configured to automatically close the pipe when the connection ends are separated and to allow the pipe to open when the connection ends are coupled; an outer tube that is arranged around each conveying pipe and defines an evacuated space for thermally insulating the conveying pipe; a quick-connection mechanism for quickly connecting the two pipes which comprises cooperating mechanical fastening members that are located at each of the two connecting ends, respectively; an emergency separation system that is configured to allow the two pipes to be separated when the connection ends are coupled via the quick-connection system, wherein the emergency separation system is located at a connection end of a first pipe and comprises a set of connecting parts that are movable between a first configuration, which provides a rigid mechanical connection between the connection end that is equipped with one or more fastening members of the first pipe and the rest of the first pipe, and a second, split configuration in which the connection end of the first pipe that is equipped with one or more mechanical fastening members of the quick-connection mechanism is separated from the rest of the first pipe.

A corrugated pipe connection device including: a corrugated stainless steel pipe; a straight pipe portion formed on each end of the corrugated stainless steel pipe; a connection member made of a metal and fitted to the outer periphery of the straight pipe portion; a synthetic resin sleeve fitted to the outer periphery of the straight pipe portion and having a flange; an expansion portion expanded from the end of the straight pipe portion; and a silicone packing having a ring portion coming into contact with the expansion portion, a protrusion portion protruding inwardly from the inner periphery of the ring portion to be inserted to the inside the straight pipe portion, and an insertion portion formed on the outer periphery thereof to surround the expansion portion therewith.

The utility model discloses a corrosion-resistant metal lining socket type multilayer pipe, which belongs to the technical field of pipes and comprises an inner pipe, a middle layer and an outer pipe which are sequentially sleeved from inside to outside, steps and / or grooves are arranged on the inner wall of a socket end, and the inner pipe, the middle layer and the outer pipe are adhered to form the pipe or compressed to form the pipe. The outer pipe comprises a socket end, a pipe body and a spigot end which are connected in sequence, the outer pipe is made of metal, the inner pipe is made of a corrosion-resistant material, each end of the pipe is provided with a sealing layer and a lining ring made of a corrosion-resistant metal material, and the length of each lining ring extending into the pipe is not less than 20mm. The anti-corrosion pipeline is good in anti-corrosion effect, and the water conveying efficiency of the pipeline is improved. The corrosion-resistant metal lining ring prevents each layer of material from being stripped; and the strength and the deformation resistance of the pipe are improved.

The invention discloses a self-sensing geopolymer composite material, and belongs to the technical field of intelligent cement base material preparation. The raw materials comprise an alkaline exciting agent, standard sand, iron tailing sand, a silicon-aluminum mineral cementing material, short carbon fibers, water, a water reducing agent and a dispersing agent. The self-sensing geopolymer composite material has multiple conductive phases which can generate a composite effect which is not possessed by a single conductive phase when being used together, multiple conductive channels can generate a synergistic or multi-scale effect (long and short range synergistic conduction), the sensing stability (repeatability) is good, the noise is low, and the self-sensing geopolymer composite material has good application prospects. The requirement for the carbon fiber mixing amount when the conductive seepage threshold value is reached and the threshold value are optimized to a certain degree, and the cost can be saved. When the device is applied to tunnel engineering reinforcement of lining segments and sprayed concrete, a tunnel supporting effect can be achieved, damage of a tunnel structure can be sensed, sensing performance is achieved without additional sensing materials / devices, nondestructive testing of the structure is achieved, and therefore the safety of the structure is improved, and the service life of the structure is prolonged.

The invention discloses a high-corrosion-resistance heating stainless steel composite pipe and a preparation technology thereof, and belongs to the technical field of composite pipe preparation. The stainless steel pipe serves as the innermost layer and the outermost layer, the carbon steel pipe serves as the middle part, the space between the stainless steel pipe and the carbon steel pipe is filled with the low-melting-point glass powder, the low-melting-point glass powder is melted under the high-temperature and high-pressure conditions in the machining process, and therefore welding defects such as weld cracks, air holes or gaps possibly generated in the machining process of the steel pipe are fully repaired; and the interface bonding strength and the corrosion resistance of chemical substances such as acid and alkali of the composite pipe are greatly improved, and longitudinal heat preservation and transverse heat transfer of the heating pipeline are facilitated.

A metal bellows for downhole use includes: a bellows capsule with a first end and a second end; an inner diameter side and an outer diameter side arranged between the first end and the second end; where the bellows capsule comprises a first bellows convolution and second bellows convolution and optionally additional bellows convolutions; and each bellows convolution comprises: a root on the inner diameter side of the bellows capsule; a first sidewall extending from the root toward the outer diameter side of the bellows capsule with a first connection point at the distal end; a second sidewall extending from the root toward the outer diameter side of the bellows capsule with a second connection point at the distal end and wherein the second sidewall is on the opposite side of the root as the first sidewall; wherein: the bellows convolutions are formed as a single piece; and the second sidewall connection point of the first bellows convolution is permanently affixed to the first sidewall connection point of the second bellows convolution.

The invention belongs to the field of metal material processing, discloses an extrusion forming method for a titanium alloy seamless tube and a product thereof, adopts a process route of primary reaming and secondary reaming to produce the titanium alloy seamless tube, and solves the problem of expansion cracking caused by adopting a primary large reaming ratio or material waste caused by drilling a large-diameter inner hole in the prior art. Production of products with the total reaming ratio larger than 1.30 is achieved; the steel sleeve is firstly wrapped on the pipe blank, and then the copper sleeve is wrapped on the pipe blank, so that copper pollution of the copper sleeve on the titanium alloy blank can be effectively avoided, and the surface quality of a product is improved; the double-cone die is adopted for extrusion, the metal flowing stability can be improved, the extrusion force is reduced, the extrusion defects are reduced, deformation is stable and uniform, cracks of the pipe can be avoided, and the surface quality of the pipe is improved; and meanwhile, the double-cone die can reduce friction between the titanium alloy and the die, and the copper sheath is protected. The method is suitable for metal material processing industry.

The invention discloses a polyethylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polyethylene composite material comprises the following components in parts by weight: 100 parts of high-density polyethylene, 6-20 parts of a high-density polyethylene reclaimed material, 3-16 parts of ultra-high molecular weight polyethylene, 1-6 parts of a compatilizer, 1-2 parts of an inorganic filler and 1-2 parts of a flow modifier, 2-3 parts of color master batch; wherein the viscosity average relative molecular weight of the ultra-high molecular weight polyethylene is 1,000,000-2,000,000, and the test standard is ASTM (American Society for Testing Material) D4020. According to the polyethylene composite material disclosed by the invention, part of the high-density polyethylene recycled material is doped, and the interface bonding force between the new high-density polyethylene material and the high-density polyethylene recycled material is improved through the synergistic effect of the ultra-high molecular weight polyethylene, the compatilizer and the inorganic filler; the mechanical property and the wear-resisting property of the polyethylene composite material doped with the high-density polyethylene reclaimed material are improved.

A fluid connection for a hydromotive machine or fluid-control valve having a first duct and a second duct. The first duct includes a mid-portion between a first end of the first duct and a second end of the first duct that has a non-circular cross-section. A second end of the first duct is wholly within the second end of the second duct. A first end of the second duct is wholly outside of the first duct.

The invention relates to the technical field of composite pipes, and discloses a wear-resistant acid-corrosion-resistant environment-friendly anti-explosion PE pipe. The pipe adopts a multi-layer co-extrusion structural design, and comprises a wear-resistant inner layer, a reinforced middle layer and a protective outer layer. High-density polyethylene is used as a base material, silicon carbide particles and aluminum oxide particles with the surfaces subjected to multifunctional modification are combined to serve as reinforcing filler, and functional polyethylene is used as a base interface modification material, so that the problems that in a traditional pipe, particles and a base interface are low in bonding force, uneven in dispersion, prone to falling off and the like are solved. Carboxyl and unsaturated double bonds are introduced into the functionalized polyethylene through a maleic anhydride grafting technology, so that efficient chemical combination of particles and a matrix is realized, and the mechanical property and the chemical stability of the composite material are improved. The inner layer enhances wear resistance through high particle content, the middle layer provides support and corrosion resistance, and the outer layer improves weather resistance and protection performance of the pipe.

To provide a high-strength stainless steel seamless pipe for oil wells, the high-strength stainless steel seamless pipe having high strength and excellent low-temperature toughness and being excellent in crevice corrosion resistance in an untreated seawater environment.　There is provided a high-strength stainless steel seamless steel pipe for oil wells having a component composition that comprises specific components and that satisfies relationship (1) and relationship (2), with the balance being Fe and unavoidable impurities, having a yield strength of 758 MPa or above, and having an absorption energy vE-10 of 40 J or above at a test temperature of -10°C in a Charpy impact test. Relationship (1): Cr + 0.22 × Ni + 0.38 × (Mo + 0.5 × W) + 0.89 × Cu + 0.09 × Co ≥ 21.4 Cr, Ni, Mo, W, Cu and Co in relationship (1) are the contained amounts (mass %) of the respective elements, and the contained amount of elements that are not contained is deemed to be zero. Relationship (2): Co-Nb ≥ 0.13 Co and Nb in relationship (2) are the contained amounts (mass %) of the respective elements.

The invention relates to the technical field of inorganic non-metallic materials, in particular to a quaternized cholic acid polyurethane modified polyvinyl chloride material, a preparation method and application. The quaternized cholic acid polyurethane polymer is based on a polyurethane elastomer developed by using cholic acid molecules with a rigid skeleton as a hard segment unit and flexible oligomeric ethylene glycol as a soft segment unit, hydroxyl on cholic acid polyurethane is quaternized to prepare cation modified cholic acid polyurethane, and the cation modified cholic acid polyurethane simulates amphiphilic characteristics of natural peptides. The quaternized cholic acid polyurethane is introduced into a polyvinyl chloride (PVC) matrix as an antibacterial agent, so that the growth of microorganisms such as bacteria and molds can be effectively inhibited, the antibacterial property is achieved, bacteria breeding on the inner surface of a pipeline is avoided, and the composite material is endowed with better biocompatibility and antibacterial property; meanwhile, the quaternized cholic acid polyurethane can effectively improve the strength and toughness of the PVC material; wide application prospects are realized.

A pipeline connecting device belongs to the field of pipeline connecting devices and comprises an outer pipe, two inner pipes are rotationally arranged in the outer pipe, a row of multiple sliding rings are arranged in each inner pipe in a sliding mode, every two adjacent sliding rings are connected through an elastic rubber cylinder, and a fixing ring fixed to the outer pipe is arranged between the two inner pipes. The fixing ring is connected with the adjacent sliding rings on the two sides through the elastic rubber barrels respectively, the elastic rubber barrels, the sliding rings and the fixing ring form a fixing barrel, and transverse strip-shaped sliding grooves are formed in the inner wall of the inner pipe respectively. The pipeline connecting device is simple in structure, ingenious in concept, capable of being suitable for connection of pipelines of various sizes, high in applicability, good in sealing effect and easy to operate, multiple independent seals are arranged, multiple seals are formed, the pipelines can be rapidly positioned, clamped and sealed only by screwing the inner pipe to enable the inner pipe to rotate relative to the outer pipe, market requirements can be met, and the pipeline connecting device is suitable for popularization.

The invention provides a water supply and drainage pressure-bearing combined pipeline, and relates to the technical field of water delivery pipelines, an inner pipeline is arranged in a pipeline inner cavity of an outer pipeline, the central axis of the inner pipeline coincides with the central axis of the outer pipeline, and an interlayer filling space is formed between the pipeline outer wall of the inner pipeline and the pipeline inner wall of the outer pipeline; the connecting structure comprises a plurality of first structure connecting pieces and a plurality of second structure connecting pieces, the first structure connecting pieces are arranged on the outer wall of the inner pipeline, the second structure connecting pieces are arranged on the inner wall of the outer pipeline, and the interlayer filling space between the inner pipeline and the outer pipeline is filled with the filling substance. And the inner pipeline and the first structure connecting piece on the inner pipeline are mutually fixed with the outer pipeline and the second structure connecting piece on the outer pipeline through the filling material. The pipe wall thickness of the water supply and drainage pressure-bearing combined pipeline is smaller than that of a pure steel pipeline, the machining difficulty and the machining cost are lower, the inner diameter can exceed 8 m, and the pipe wall thickness of the inner pipeline and the pipe wall thickness of the outer pipeline are controlled to range from 5 mm to 30 mm.

The present invention provides a rubber member having excellent corrosion resistance and a semiconductor manufacturing–related device using the same. Provided is a rubber member that includes an olefin-based rubber, the rubber member being at least one member selected from the group consisting of building material members, mobility members, aerospace members, semiconductor members, and information communication members, and the rubber member coming into contact with a corrosive substance.

The invention relates to the technical field of pultrusion composite pipeline manufacturing, and discloses a fiber weaving needling sewing pultrusion composite pipeline and a manufacturing method thereof.The pultrusion composite pipeline comprises a reinforcing body formed by a plurality of weaving layers and / or winding layers, and a plurality of sewing yarns penetrating through the reinforcing body are evenly distributed on the annular section of the reinforcing body; the sewing yarns extend in parallel in the extending direction of the pipeline, and the threads extend in a rotating mode or intersect to form net-shaped extension. According to the pultrusion composite pipeline provided by the invention, the plurality of inner and outer reinforced fiber layers are connected together in the radial direction through more than one sewing yarn, and the track of a sewing line is continuously sewn along the axial direction, so that an integral three-dimensional structure of a reinforcement body is formed; the tensile strength and the elastic modulus of the three-dimensional integral reinforced fiber are far higher than those of thermosetting resin, and under the combined action of the reinforced fiber and the resin, the shearing and tearing resistance and the pressure resistance of the pipeline are improved compared with those of a pipeline without reinforcement sewing operation.

The invention discloses a high-strength modified high-density polyethylene double-wall corrugated pipe and a preparation method thereof, and relates to the technical field of high-density polyethylene double-wall corrugated pipes. The high-strength modified high-density polyethylene double-wall corrugated pipe is prepared from the following components: high-density polyethylene, ultra-high molecular weight polyethylene, reinforcing filler, a compatilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: reinforcing filler surface modification; all the components are subjected to melt blending to prepare the modified composite material; the modified composite material is subjected to extrusion molding to form the double-wall corrugated pipe; and cooling, shaping and cutting. The UHMWPE and the reinforcing filler are introduced, and the compatilizer is combined to improve interface bonding, so that macromolecular chains of the UHMWPE are entangled to form a tough network, the reinforcing filler provides rigid support, and the high-temperature modulus and creep resistance are synergistically improved; high-temperature oxidative degradation is effectively inhibited through the antioxidant, the slow crack growth resistance time is prolonged, and the service life is prolonged.

The invention relates to a composition comprising, with respect to the total weight of the composition: - at least 50 wt.% of at least one polyamide having an inherent viscosity of greater than 1.2; - from 0.05 to 20 wt.% of a polar graphene having an average thickness of between 0.5 and 75 nm; and - from 3 to 40 wt.% of at least one impact modifier. The invention also relates to the use of this composition for preparing single-layer or multi-layer structures for storing, transporting and dispensing fluid, in particular transport vehicle fluid.

The utility model discloses a pressure-resistant polyurethane thermal insulation pipe which comprises an inner pipe and an outer pipe, an inner thermal insulation layer is arranged in the inner pipe, a reinforcing layer is arranged on the outer side of the inner thermal insulation layer, reinforcing ribs are installed in the reinforcing layer at equal intervals, and the pressure-resistant polyurethane thermal insulation pipe further comprises a buffering mechanism and a pressure-resistant mechanism. The buffering mechanism comprises a buffering layer, a supporting column, a compression spring, a movable column and a high-elasticity buffering pad, the buffering layer is arranged on the outer side of the reinforcing layer, an outer heat preservation layer is arranged on the inner side of the outer pipe, an anti-corrosion layer is arranged on the outer side of the outer heat preservation layer, and a wear-resisting layer is arranged on the outer side of the anti-corrosion layer. According to the pressure-resistant polyurethane heat preservation pipe, the buffering mechanism is arranged to buffer the pressure of the polyurethane heat preservation pipe and prevent the polyurethane heat preservation pipe from being broken, the pressure-resistant mechanism is arranged to improve the pressure resistance of the polyurethane heat preservation pipe and prevent the polyurethane heat preservation pipe from being easily collided and damaged, the detachable inner pipe and the detachable outer pipe are arranged, the polyurethane heat preservation pipe is conveniently and rapidly disassembled and assembled, and the installation and maintenance efficiency is improved.

The invention belongs to the technical field of 3PE corrosion prevention, and particularly relates to a high-temperature-resistant and cathodic disbonding-resistant 3PE corrosion-resistant pipeline and a preparation method thereof. A pipeline epoxy bottom layer, a middle adhesive layer and a polyethylene surface layer are subjected to systematic chemical synergistic modification, specifically, the epoxy bottom layer is modified with phenolic resin and amino silane, and a heat-resistant compact barrier is formed; the middle layer reacts with maleic anhydride grafted polyethylene through amino silane to construct a chemical bridge for simultaneously connecting the upper layer and the lower layer; the surface layer is grafted with high-density polyethylene through fluoroprimary amine modified glycidyl methacrylate, and a hydrophobic and oleophobic chain and a reactive functional group are introduced; according to the structure, through the synergistic effect of the high-temperature stability of the bottom layer, the two-way chemical bridging capacity of the middle layer and the inert hydrophobic characteristic of the surface layer, the long-term use temperature upper limit, the stripping resistance and the medium infiltration resistance of the pipeline are improved, and a solution is provided for long-term protection of the pipeline in the severe environment.

The invention discloses a spigot-and-socket type multi-layer pipe with edge-wrapped end faces and a manufacturing method thereof.The pipe comprises an inner pipe, a middle layer and an outer pipe, the middle layer is made of an insulating material, the inner pipe is made of a corrosion-resistant material, the outer pipe comprises a bell mouth, a pipe body and a spigot which are sequentially connected, one end of the inner pipe wraps the end face of the spigot, and the other end of the inner pipe wraps the end face of the pipe body; and the inner pipe, the middle layer and the outer pipe are compressed to form the pipe. The manufacturing method comprises the steps that the outer pipe is treated, and the inner pipe and the middle layer are manufactured; the inner pipe, the middle layer and the outer pipe are sequentially arranged from inside to outside; each layer is compressed; and covering edges are arranged. The corrosion-resistant inner pipe prevents the outer pipe from being rusted to pollute water quality, the thickness of the lining is small, the inner pipe and the outer pipe are completely separated by the middle layer, the covered edge and the inner sleeve are integrated, the inner sleeve is prevented from electrochemical corrosion and being washed away by water flow, the covered edge is free of steps, and water flow resistance of the steps is eradicated. And the minimum thickness of the composite socket and the minimum thickness of the single-layer socket can be obtained through theoretical calculation.

The invention relates to a projection exposure system (1, 101) for semiconductor lithography, comprising a connecting element (30, 40) for connecting two components of the projection exposure system (1, 101), wherein the connecting element (30, 40) has a tube (31, 41). The projection exposure system (1, 101) is characterized in that the tube (31, 41) has at least one stiffening element (32, 42.1, 42.2, 42.3). The invention further relates to a method for designing a connecting element (30, 40) for a projection exposure system (1, 101) for semiconductor lithography, wherein the connecting element (30, 40) is designed to connect two components of the projection exposure system (1, 101) and wherein the connecting element (30, 40) has a hose (31, 41), comprising the following method steps: - Determination of the mechanical vibrations occurring in a fluid flowing through the hose (31,41), - Determining the arrangement of at least one stiffening element (32,42.1,42.2,42.3) on the hose (31,41).

The invention discloses a flexible hydrogen transport PE composite pipe. The flexible hydrogen transport PE composite pipe is of a three-layer structure, raw material selection, carbon fiber pretreatment, filler pulping, coating treatment and co-extrusion forming. The method solves the problems that an existing preparation method is uneven in material mixing and poor in pipe size precision. The invention further discloses the flexible hydrogen transport PE composite pipe, the flexible hydrogen transport PE composite pipe is prepared by the preparation method of the flexible hydrogen transport PE composite pipe, and the mechanical property is also improved while the flame-retardant, antistatic and compact properties are improved.

The invention relates to the field of seabed mining equipment, and provides an ore pulp transportation composite pipe cable, which comprises a transportation pipe, a photoelectric cable, a socket fixing plate, a photoelectric socket, a sheath and a protection shell, and is characterized in that the end part of the transportation pipe is used for being connected with an ore pulp discharge pipe of a deep sea mining vehicle to convey ore pulp; the sheath is sleeved outside the conveying pipe, two ends of the protective shell are arranged in a penetrating manner, the protective shell is sleeved at the joint of the conveying pipe and the ore pulp discharge pipe, one end of the protective shell is hermetically connected with the sheath, the socket fixing plate is hermetically mounted at the other end of the protective shell, and the photoelectric socket is hermetically inserted into the socket fixing plate; the photoelectric cable penetrates through the gap between the conveying pipe and the sheath and is electrically connected with the photoelectric socket, and the photoelectric socket is used for being electrically connected with an underwater photoelectric fly wire. The whole ore pulp transportation composite pipe cable can realize ore pulp transportation and also can realize electric power and communication transmission functions with an underwater photoelectric fly wire, so that the arrangement number of underwater pipelines is reduced, the occupied space is small, the integration degree is high, and the cost is saved.

An aircraft pipework assembly is disclosed including an aircraft structure; pipework; a fixture arrangement between the pipework and the aircraft structure; a tie rod connecting the pipework to the aircraft structure; a first tie rod bearing which connects the tie rod to the pipework; and a second tie rod bearing which connects the tie rod to the aircraft structure. The fixture arrangement includes a spherical bearing, the spherical bearing comprising a ball mounted to the pipework, and a housing coupled to the aircraft structure. The ball includes a convex spherical bearing surface; and the housing comprises a concave spherical bearing surface which mates with the convex spherical bearing surface of the ball. The fixture arrangement is configured to enable the pipework to translate relative to the ball in an axial direction aligned with a longitudinal axis of the pipework.

The invention relates to a PPR antibacterial pipeline and a preparation method thereof, and belongs to the technical field of pipeline processing. The sea-buckthorn extract is used as an auxiliary medium, green synthesis of the silver nanoparticles can be promoted, use of traditional toxic reducing agents and stabilizing agents is avoided, natural active ingredients contained in the sea-buckthorn extract and the silver nanoparticles generate a synergistic effect, the antibacterial efficiency is remarkably enhanced, and the dosage and biotoxicity of the silver nanoparticles are reduced. Meanwhile, the nano silicon dioxide is added, so that the coating can be kept stable in a high-temperature environment. The carboxymethyl chitosan endows the pipeline with excellent antibacterial performance, and forms a synergistic effect with the silver nanoparticles, so that the antibacterial ability of the pipeline is further enhanced. Through the modification of the silane coupling agent KH560, the interface bonding force between the nano silicon dioxide and carboxymethyl chitosan and the interface bonding force between the nano silicon dioxide and the main component PPR of the pipeline are enhanced, so that the reinforcing agent can be more uniformly and stably dispersed in a PPR matrix, and the overall performance of the pipeline is improved.

A fiber reinforced laminate pipe joint can include a first pipe, a second pipe, where the first pipe and the second pipe can be fiber reinforced laminate pipes, and a pipe joint insert. The pipe joint insert can be partially inserted inside the first pipe and can be partially inserted inside the second pipe. The pipe joint insert can be bonded to the first pipe and the second pipe, where the pipe joint insert can include a fiber reinforced laminate, where a bonding agent in the fiber reinforced laminate of the pipe joint insert can be distinct from a bonding agent used to bond the pipe joint insert to the first pipe.

The invention discloses a novel high-temperature-resistant and corrosion-resistant aluminum alloy plastic-lined PP-RCT composite pipe, and relates to the technical field of composite pipelines. The composite pipe is of a five-layer gradient composite structure, wherein the outer layer is an anodized aluminum alloy base body, and the inner surface is provided with laser micro-texture anchoring points; the secondary layer is a chromium-free Dacromet anti-corrosion layer, and the interface bonding force is improved through a three-dimensional network structure; the third layer is a gradient curing bonding layer which is cured by stages to eliminate thermal stress; the fourth layer is a dynamic stress compensation layer for absorbing the thermal expansion difference between the metal layer and the plastic layer; and the inner layer is a PP-RCT functional layer which has high temperature resistance and corrosion resistance. The end of the composite pipe is sealed through laser welding, an embedded intelligent monitoring system is integrated, and axial stress and temperature are monitored in real time. Compared with the prior art, the invention is suitable for pipeline systems under extreme working conditions of petrochemical engineering, ocean engineering, high-temperature fluid transportation and the like.

The invention discloses a high-density polyethylene silicon core pipe and a preparation method thereof, and relates to the technical field of silicon core pipes. The high-density polyethylene is subjected to modification treatment in different modes to obtain different modified high-density polyethylene; different modified high-density polyethylene is used as a main component, and a silicon core pipe outer-layer mixture and a silicon core pipe inner-layer mixture are prepared respectively; finally, the silicon core pipe outer layer mixture and the silicon core pipe inner layer mixture are subjected to melt co-extrusion, Si-O-C chemical bonding is generated on the inner layer and the outer layer, and the high-density polyethylene silicon core pipe is obtained. The high-density polyethylene silicon core pipe prepared by the invention is very high in interlayer bonding strength and very excellent in flame retardant property and mechanical property.

The invention relates to the field of automobile part manufacturing, and particularly discloses a barrier layer direct bonding type TPE material for an automobile air conditioner pipeline system and a preparation method and application of the barrier layer direct bonding type TPE material. The TPE material is prepared from the following raw materials: a thermoplastic elastomer TPE, PA, EVOH, polyether block amide, a glycidyl methacrylate grafted olefin copolymer elastomer, a toughening compatilizer, composite modified montmorillonite, a cold-resistant additive, an antioxidant and paraffin oil. Wherein the composite silane coupling agent, lauric acid and N, N '-carbonyldiimidazole are adopted to modify the nano-montmorillonite, so that the dispersity of nano-montmorillonite particles is improved, the formation of aggregates is effectively reduced, and the mechanical property of the material is enhanced; the polyether block amide, the glycidyl methacrylate grafted olefin copolymer elastomer and the toughening compatilizer have a synergistic effect, so that good adhesiveness of the TPE material and the barrier layer is realized.