Abstract: The invention relates to a cold-resistant high impact strength unplasticized polyvinyl chloride (PVC-U) composite pipe and a preparation method thereof The pipe is of a three-layer structure which sequentially includes an inner PVC layer, a middle foaming polyethylene (PE) layer and an outer PE layer The preparation method includes the following steps that raw materials of the PVC layer are uniformly mixed, added into a PVC pipe production line and subjected to extrusion, setting, cooling, pulling, cutting and the like, so that an inner pipe layer is obtained; the middle foaming PE layer is composited on the inner PVC layer through a composite production line; meanwhile, the outer PE layer is composited on the middle layer, and a finished product is obtained By means of the cold-resistant high impact strength PVC-U composite pipe and the preparation method thereof, cold resistance, shock resistance and thermal insulation property of the pipe are extremely improved; the adaptability of the plastic pipe to the environment is enhanced; meanwhile, the defect of poor cold resistance of the PVC-U pipe is overcome; excellent properties of PVC and PE pipes are integrated

Abstract: The invention provides an expandable and windable polyvinyl chloride (PVC) lining pipe as well as preparation and application methods thereof. According to the preparation and application methods, after being prepared, the polyvinyl chloride lining pipe can be made into pipes of which the cross-sections are C-shaped, U-shaped or H-shaped pipe and the like, the pipes are wound on a reel; during the use, the pipes can be preheated and conveniently be removed from the reel and the pipes can be radially expanded at a high temperature to restore circular cross-section and can maintain the expanded size after the pipes are cooled. The polyvinyl chloride lining pipe is small in size and large in length during transport and is convenient to construct and has the same size as that of the conventional PVC pipe during the use and good flexibility when the polyvinyl chloride lining pipe is drawn inside underground pipes and the length of a single pipe is increased.

Abstract: The invention provides a heat-insulation PVC (polyvinyl chloride) plastic pipeline which comprises a PVC pipe, a metal heat-conducting layer, a heat-insulation layer, an anticorrosion layer and a solar cell panel. The heat-insulation layer encircles the PVC pipe, the anticorrosion layer is coated on an outer layer of the heat-insulation layer, the metal heat-conducting layer can generate heat under the effect of the solar cell panel, is a netted resistance layer and is connected with wires, resistance wires are longitudinally and transversely staggered on one another to form the netted resistance layer, and the other ends of the wires and the solar cell panel are connected with one another to form a closed circuit. The heat-insulation PVC plastic pipeline has the advantages that currents can be generated by the solar cell panel under the sun illumination conditions in the daytime and can be conducted to the netted resistance layer via the wires, electric energy can be converted into heat energy, the heat can be sustained at night by the aid of the heat-insulation layer, and accordingly freeze protection effects an be realized for the PVC pipe without external power sources; owing to protection of the anticorrosion layer which is the outermost layer, the heat-insulation PVC plastic pipeline can be buried under the ground, and is excellent in water resistance, impact resistance, anticorrosion property and flame resistance, simple in structure and easy to manufacture.

Abstract: The invention discloses a preparation method of a heat-fusible modified polyvinyl chloride (PVC) pipe. The preparation method is characterized in that the pipe is prepared by mixing 100 parts by weight of PVC resin, 1.5-6.0 parts by weight of a plasticizer, 0.5-4.0 parts by weight of an activator, 3.0-8.0 parts by weight of a toughening agent, 4-10 parts by weight of an impact modifier, 1 part by weight of barium stearate, 0.5 part by weight of an ultraviolet absorber, 2-6 parts by weight of a stabilizer and 1.0-5.0 parts by weight of epoxy resin, stirring, mixing and then extruding for molding. Compared with the prior art, by adopting the preparation method disclosed by the invention, heat-fusible welding is realized, the use of a flare and an adhesive in butting construction of PVC pipes is eliminated, and the production and construction cost is reduced by about 20-30%; and furthermore, the pipe has good impact resistance, high tensile strength, long service life, high welding strength and firm connection, and is particularly suitable for butting of the PVC pipes in trenchless engineering construction.

Abstract: The invention discloses a PVC pipe and thick wall steel tube composite hollow recycled concrete pile, which is mainly prepared from PVC pipes, a round reinforcement cage framework, thick wall steel tubes and recycled concrete, wherein the round reinforcement cage framework and the thick wall steel tubes are arranged in PVC pipes, and the three are concentrically arranged; recycled concrete is poured into the PVC pipes and the thick wall steel tubes; the built-in thick wall steel tubes are capable of improving single-pile bearing capacity and non-deformability by a large margin; the externally covered PVC pipes are capable of effectively preventing pile bodies from being corroded and improving pipe body durability; at the same time, the recycled concrete inside can be jointed restrained by the PVC pipes and spiral stirrups, thus further enhancing composite pile bearing capacity; and waste concrete can be used as recycled aggregate, thus being favor of popularization and application of recycled concrete in building foundation engineering. In short, the PVC pipe and thick wall steel tube composite hollow recycled concrete pile has the advantages of good pile formation quality, high bearing capability, good non-deformability, good durability, small environment influence, quick construction speed and the like.

Abstract: The utility model discloses an X-shaped freezing pipe The X-shaped freezing pipe is that the cross section of a pipe body is X shaped; a liquid supply pipe is inserted into the pipe body; a liquid returning pipe is arranged on the top part of the liquid supplying pipe; the freezing pipe is a low-carbon stainless steel pipe or a PVC pipe or a PPR pipe or an ABS pipe or a PE pipe Compared with the traditional circular freezing pipe, the X-shaped freezing pipe has the beneficial effects that the specific surface area of material in unit of area is large, so that the freezing capacity of single pipe can be greatly improved on the premise that the workload is not increased, and as a result, the cost performance can be increased; the periphery is extended; few circulating refrigerating mediums are used; the X-shaped freezing pipe has outstanding advantages of being high in construction practicability, convenient to control the construction quality, good in reinforcing effect, and outstanding in economy, and worthy of popularization and application

Abstract: The invention relates to the technical field of building, in particular to a wood plastic material and a preparation method thereof. The wood plastic material is prepared by the following raw materials which comprise, by weight, 150-200 parts of plastic steel, 50-80 parts of foaming boards, 20-50 parts of calcium carbonate, 15-30 parts of wood flour, 20-50 parts of PVC pipe materials, 1-1.5 parts of azodicarbonamide, 0.3-1 part of stearic acid, 1-2 parts of polyethylene wax, 2-3 parts of PVC processing agents and 1-2 parts of chlorinated polyethylene. The provided wood plastic material is good in flatness and smoothness, high temperature resistant, good in ageing-resistant performance, good in stability, not prone to deforming, and good in flame retardant performance. According to the provided preparation method for the wood plastic material, the preparation technology is easy, the maneuverability is strong, the process is easy to control, and the industrial popularization is suitable.

Abstract: The invention relates to the field of composite materials, in particular to a reinforced toughened PVC (polyvinyl chloride) pipe and a method for manufacturing the same. The PVC pipe comprises, by weight, 160-180 parts of PVC resin, 8-10 parts of nano calcium carbonate, 3-4 parts of calcium stearate, 6-8 parts of chlorinated polyethylene, 3-4 parts of glass fibers, 4-5 parts of titanium dioxide, 2-3 parts of PE (polyethylene) wax, 10-15 parts of nitrile-butadiene rubber, 6-8 parts of oxidized polyethylene wax, 2-3 parts of microcrystalline wax, 2-3 parts of graphite, 2-4 parts of calcium-zinc stabilizers and 4-5 parts of ACR (acrylate copolymers). The reinforced toughened PVC pipe and the method have the advantages that the PVC pipe is reinforced and toughened and is excellent in heat resistance, light fastness, aging resistance, tensile strength and impact strength, the service life of the PVC pipe can be prolonged, additional value of the PVC pipe can be increased, and the application range of the PVC pipe can be expanded.

Abstract: The invention relates to the field of composite materials, in particular to a hard PVC (polyvinyl chloride) pipe and a production method thereof The PVC pipe comprises, by weight, 120 to 140 parts of PVC, 6 to 8 parts of chlorinated polyethylene, 10 to 20 parts of nano calcium carbonate, 3 to 4 parts of glass fiber, 4 to 5 parts of titanium white, 2 to 3 parts of PE (polyethylene) wax, 2 to 4 parts of calcium-zinc stabilizer, and 4 to 5 parts of ACR By using the hard PVC pipe, the hard PVC pipe is usable at a higher temperature, processability is optimized, high-speed processing of PVC plates is facilitated, and processing efficiency of products is improved

Abstract: The invention discloses a PVC pipe production technology. A stabilizer used in the machining process is a rare earth compound stabilizer which is good in stability, free of poisoness and harmlessness and small in pollution to the environment. The temperature of a die orifice connector is 165 DEG C, a die orifice is an importance device, and the temperature of the connector is set to be near to the temperature of the die orifice so that the damage of the high temperature to the connector can be reduced. The vacuum degree of a material cylinder is 0.088 MPa, raw materials can be extruded out evenly under the pressure, and bubbles are greatly reduced. Vacuum cooling forming is adopted as a cooling mode, the vacuum degree is 35.7 kPa, the cooling mode is high in cooling efficiency, the cooling effect is good, and the pipe sizing is good. A notch is abraded after cutting is conducted, a pipe can be smoother, and the notch is prevented from puncturing other people in the use process.

Abstract: The utility model discloses a PVC top die support for a wall column. The PVC top die support comprises a plurality of PVC pipes which have the same length; a quincunx structure is formed by bundling the PVC pipes together with a plurality of iron wires; each PVC pipe is filled with cement mortar. The PVC top die support is simple in structure and easy to manufacture, and has the benefits that the flexibility of the PVC pipes and the excellent compressive property of the cement mortar are effectively utilized, so that the PVC top die support can be higher in strength, and the actual supporting function can be achieved; less materials are wasted, that is, the PVC pipes can be combined for rational utilization according to different section sizes; after a wall column component is shaped through pouring, no any surface treatment is needed, so that the potential hazards of corrosion on the surface of a steel bar top die support and re-rusting caused by puttying can be avoided; the surface of a die plate cannot be damaged, that is, the contact area of the die plate is large, so that the partial deformation possibility of the die plate is low. Therefore, the utilization stability and reliability of the PVC top die support can be effectively improved.

Abstract: The utility model discloses an adjustable PVC pipe injecting system. The system comprises an outer pipe layer injecting machine, a PVC pipe solidifying machine and a PVC pipe tracing device, wherein the outer pipe layer injecting machine is provided with a feed hopper, a material mixing machine and an injecting head; the PVC pipe solidifying machine is provided with a running water tank; the PVC pipe tracing device is provided with an outlet pipe wheelset and an inlet pipe wheelset; the outlet pipe wheelset as well as the inlet pipe wheelset is provided with two rollers up and down, and the rollers are driven by a motor and are used for clamping PVC pipes; the outlet pipe wheelset and the inlet pipe wheelset are mounted on a position regulating frame of which the position and the height can be adjusted; the injecting head, the running water tank, the inlet pipe wheelset and the outlet pipe wheelset are straightly and levelly arrayed. According to the utility model, outer pipe layers are injected for the PVC pipes, and at the same time, the PVC pipes are straightly and uniformly stressed and traced, so that the outer pipe layers are effectively prevented from generating internal stress, and the structural strength and the quality of the outer layers of the PVC pipes are ensured. The processing efficiency is high, the PVC pipes of different diameters can be adjusted and adapted, the production cost is effectively reduced, and the use value is improved.

Abstract: The utility model discloses a water supply-drainage pipe. The water supply-drainage pipe comprises a pipe body and a steel pipe coated with the interior of the pipe body, the pipe body comprises an outer pipe and an inner pipe, the outer pipe and the inner pipe are fixedly connected through reinforcing ribs, the two sides of the steel pipe in the pipe body are each provided with a shock absorption, and the outer surface of the outer pipe is provided with knurls. According to the water supply-drainage pipe, on one hand, during the assembly and use processes, the water supply-drainage pipe is not easy to damage, the structure strength is enhanced, and transportation and the assembly of the water supply-drainage pipe are more convenient; on the other hand, characters such as corrosion resistance of a PVC pipe body, high hardness of the steel pipe and the like are combined together, the service life of the water supply-drainage pipe is greatly prolonged, and the utilization efficiency of the water supply-drainage pipe is greatly improved.

Abstract: The invention discloses a PVC guardrail cooling water device. The PVC guardrail cooling water device comprises a base, a water blocking side plate, a lower end surrounding plate, a supporting rod, an upper end surrounding plate, a water flow plate, a conveying plate, water flow holes, a water storage tank, water pumps, water conveying pipes and water flow pipes. The water conveying pipes and the water flow pipes are arranged in the PVC guardrail cooling water device. Water in the water storage tank can be repeatedly used, waste of water resources is reduced, and full-automatic cooling is achieved. The whole device is simple in structure and low in manufacturing cost. Meanwhile, the water flow plate and the water flow holes in the water flow plate are further arranged so that water can be evenly sprayed to a PVC pipe to be cooled, the cooling effect is very good, and the scrap rate of PVC pipes is reduced.

Abstract: The utility model discloses a freezing cement soil mixing pile. One or more freezing pipes are arranged in the center or on the circumferential ring of a pile body. The diameter of each freezing pipe is 89 mm, or 108 mm, or 127 mm, or 146 mm, or 159 mm or 168 mm. Each freezing pipe is a seamless low-carbon steel pipe or a PVC pipe or a PPR pipe or an ABS pipe or a PE pipe. The bottom ends of the freezing pipes are located 0.5-1 m above the bottom end of the pile body. The freezing cement soil mixing pile has the advantages that the freezing pipes are inserted into the cement soil mixing pile, and therefore frost heaving and thawing settlement can be effectively restrained; meanwhile, on the basis of ensuring the stratum bearing force and the waterproof performance, the shear resistance and the bending resistance of the cement soil mixing pile can be improved, the usage amount of cement can be reduced, and the cost is saved; the freezing cement soil mixing pile can be applied to the space enclosing structure of foundation pit engineering, soil reinforcement of the shield in and out hole end and foundation treatment engineering.

Abstract: The invention provides a lighter for field survival. The lighter comprises two PVC (polyvinyl chloride) pipes, wherein the diameter of one PVC pipe is greater, the diameter of the other PVC pipe is smaller, the length of the small PVC pipe is greater than the length of the large PVC pipe, the outer diameter of the small PVC pipe and the inner diameter of the large PVC pipe are mutually matched, the small PVC pipe can relatively slide in the large PVC pipe, one end of each of the two PVC pipes is sealed, a layer of petrolatum coats the outer side of the pipe wall of the small PVC pipe, inflammables are also placed at the end part of the sealed end of the small PVC pipe, the sealed end of the small PVC pipe extends into the large PVC pipe, and piston type airtight environment is formed. The lighter has the advantages that in the use process, the small PVC pipe is fast pressed down, air between pistons formed by the large and small PVC pipes is fast and acutely compressed, and the temperature fast rises, so that the inflammables at the end part of the sealed end of the small PVC pipe are fast ignited, tinder can be used for making a fire after the small PVC pipe is pulled out, great convenience is realized, and the lighter is suitable for being used under the condition without any fire source during the field survival.

Abstract: The invention relates to the field of composite, in particular to a high-strength PVC (polyvinyl chloride) pipe. The pipe comprises raw materials in parts by weight as follows: 60 parts of PVC resin, 26 parts of polyacrylate, 7 parts of a stabilizer, 5 parts of a foaming agent and 2 parts of an anti-ageing agent. Ageing of the PVC pipe can be effectively prevented, and the PVC pipe has high toughness, large elongation, high normal-temperature impact resistance and tensile strength and better sound insulation effect, is made of lighter materials and is pressure-resistant and impact-resistant.

Abstract: In Japan, the main irrigation pipeline network is increasingly getting older and losing its function due to deterioration. The concept of in-situ rehabilitation for aging pipelines, which can improve the performance of a damaged pipe by installing new pipeline inside of the existing aging pipeline, has gained increasing attention. However, the seismic mechanical behavior of pipeline rehabilitated by this method is not substantially clear. In this study, to clarify the effect of damaged outer pipe on the inner pipe, shaking table tests were conducted for the buried pipe in liquefied ground. To model the inner pipe, polyvinyl-chloride (PVC) and polyethylene (PE) pipe were used. To model the outer aging pipe, different types of concrete pipes in length were used. The test results indicated that the amplitude of the bending strain in PVC pipe sharply increased due to the stress concentration at the gap between outer pipes. Additionally, the deflection mode of the pipe was categorized into two main types; bow-shaped deformation and pendulum-shaped deformation.

Abstract: The invention discloses a method for using a high-density PVC (polyethylene) pipe as a low-temperature saline efficient conveying pipe. The processing of the PVC pipe low-temperature saline efficient conveying pipe is completed through the steps of PVC pipe discharging, chamfering, grinding, cleaning, glue water coating, bonding, heat insulation, connection and the like. On the basis of the existing freezing system, the PVC pipe is used for replacing a steel pipe, the freezing pipe blockage and the harm to freezing equipment caused by rust slag can be avoided, meanwhile, the PVC pipe is much lighter than the steel pipe, and the transportation and the installation are very convenient. In addition, the heat conduction performance of the PVC pipe is only 0.5 percent of the steel pipe, the cold quantity loss of the low-temperature saline in the conveying process can be effectively reduced, more energy is saved, and the stability and the economy of freezing cold supply are further improved.

Abstract: A repair pipe and method for repairing a standard sized PVC pipe having a hole or other pipe damage so the PVC pipe can be used to transfer fluid. The repair pipe has a tubular body that is selected with a length to extend across a cutout section of the PVC pipe and an inside diameter only slightly larger than the outside diameter of the PVC pipe to provide a small gap between the two pipes. The method comprises the steps of sliding the repair pipe over one end of the PVC pipe to provide an exposed area at the end of the PVC pipe, placing adhesive on the exposed area and on the exposed area of the opposite end of the PVC pipe and then sliding the repair pipe across the cutout section to position the repair pipe over the glued areas of the PVC pipe.

Abstract: The present invention discloses a formula and a preparation method of an anticorrosion and flame-retardant pipe plastic, wherein the components comprise, by mass, 25-45 parts of a PVCS-700 resin, 17-25 parts of a composite thermal stabilizer, 3-15 parts of melamine, 6-12 parts of modified polystyrene, 1-5 parts of nanometer calcium carbonate, 3-8 parts of a processing aid, and 2-3 parts of chlorinated polyethylene. According to the present invention, with the prepared anticorrosion and flame-retardant pipe, the processing compatibility problem of the novel heat resistance modifier modified PVCS-700 resin is solved, the use temperature of the PVC pipe is increased, the processing performance is optimized, the processing cost of the PVC pipe is reduced, and the processing efficiency of the product is increased; and the pipe melting at the high temperature can be effectively avoided, the corrosion resistance of PVC is excellent so as to effectively avoid the problem of easy explosion inside the mine road due to the high temperature and the high corrosion is effectively avoided, the safe performance is increased, and the excellent construction characteristics are provided in various mine road conditions.