Abstract: The invention relates to a dewatering-well pipeline protection device and a construction method. The dewatering-well pipeline protection device is used for protecting a rubber drain pipe and comprisesa water pumping pump, a PVC pipe, a concrete supporting block, a corrugated pipe and a steel wire net; the water pumping pump is arranged in a dewatering well in an embedded mode, the lower end of the rubber drain pipe is connected with the water pumping pump, and the upper end of the rubber drain pipe extends out to the ground; the outer side of the rubber drain pipe is sleeved with the PVC pipe, the lower end of the PVC pipe extends into a soil layer of the dewatering well, and the upper end of the PVC pipe extends out to the position above the ground; and a plurality of spaced cutting seams are arranged at the part, above a bottom plate of a basement, of the PVC pipe, and the corrugated pipe is arranged on the outer side of the PVC pipe in a sleeving mode. According to the dewatering-well pipeline protection device and the construction method, the double-layer pipeline protection device is adopted, peripheral soil can be better resisted, the compressive capacity is high, the overall strength is higher, stability is higher, and the service life is longer; and the PVC pipe and the corrugated pipe have the water seepage effect, the dewatering effect on groundwater is not only confined to the part below the bottom plate of the basement, the dewatering effect is also played on basement backfill soil, the dewatering effect is more obvious, and the speed is higher.

Abstract: In the present research an attempt has been made to replace some part of fine aggregate (sand) by an industrial waste, the industrial waste under investigation is produced when the PVC pipes are cut into the desired sizes, it is a very thin flaky substance having a specific gravity of 1.5.This material is very voluminous in nature, so it reduces the workability of concrete if used in large percentage. So this material cannot be used in very large quantities but it can successfully replace sand up to 20 percent when used in pavement blocks. Experimentation was done at a water-cement ratio ranging from 0.43-0.35.Compressive strength of the concrete has been evaluated at 7 days, 14 days 21 days and 28 days. Results of the investigation indicate that compressive strength of the concrete decreases as the percentage of PVC waste material increases.7 day strength of the concrete has varied from 35.55 MPa to 70.01 MPa and 28 day strength has varied from 56.7 MPa to 76 MPa. Water absorption was well within the limits and varied from 4.67% to 7.26% by mass. The results revealed that this waste material can satisfactorily replace sand in small amount also it is a great way to dispose of the waste and hence is a step forward in the quest for a greener concrete.

Abstract: The invention provides a vibration-absorption and noise-reduction plastic-steel cable bridge. The vibration-absorption and noise-reduction plastic-steel cable bridge takes a metal pipe as an inner core and a PVC (Polyvinyl Chloride) pipe as a surface layer; after the surface of the metal pipe is subjected to anode oxidization treatment, middle gel composed of short cotton velvet, thermoplastic resin, a phosphate starch-vegetable glue copolymerized adhesive, polyethylene oxide, nano SiO2 colloidal particles, phosphate starch, an activating agent and de-ionized is filled between the PVC pipe andthe metal pipe. PVC is used as a novel material for preparing the bridge to replace a traditional metal-made bridge; the cost of raw materials is reduced; meanwhile, a preparation method is also simple and convenient; titanium white is added into the raw materials to increase the color and luster; ammonium citrate is used as a molding auxiliary agent and CPE (Chlorinated Polyethylene) is added asa flame retardant, so that the aesthetic feeling and flame-retarding function of the bridge are ensured.

Abstract: Presented studies covered determination of minor pressure losses and values of minor loss coefficients for two selected installation valves: water control globe valve and angle valve, both DN 15. The tested valves were installed on three pipes, including PP 20x3.4 mm, PEX-Al-PEX 16x2.0 mm and Cu 15x1.0 mm. In order to reflect the real operating conditions of the angle valve, the elastic PVC pipe was used. Our researches were performed on the laboratory installation, for the variable flow rate. The obtained results of laboratory studies showed the clear dependence between minor pressure loss and minor loss coefficients of studied valves, and water flow rate (Reynolds number), degree of valves’ closure and, in some cases, manner of valves installation and material of pipes. The greatest values of minor pressure loss coefficients, of mean values relevantly statistically grater, were determined for the tested valves installed on the PEX-Al-PEX pipeline.

Abstract: The utility model discloses an environment -friendly supplies water and uses PVC pipe, including outer tube, keriotheca, steel wire stratum reticulare, heat preservation and inner tube, the inside embedding of outer tube has the keriotheca, the laminating of outer inside pipe wall has the steel wire stratum reticulare, the outer tube inboard is provided with the heat preservation, the inside innertube that is provided with of heat preservation, whole water pipe is the component of a polyvinyl chloride material, make the environmental protection more of whole water pipe, be provided with backup pad and bottom suspension fagging, the area of contact between bracing piece and steel wire stratum reticulare and the inner tube has been increased, the pressure that the place received has been reduced to connect, make the stability more of whole water pipe, be provided with the heat preservation, can effectually prevent that outside weather was crossed when hanging down winter, interior intraduct silk waste ice, lead to the water pipe to break, be provided with the connecting piece, can be so that connect convenience more between the water pipe, be provided with a sealing rubber circle, the 2nd sealing rubber circle and the 3rd sealing rubber circle, can the effectual sealing performance who increases water pipe connection position.

Abstract: The present invention relates to a pipe connector for connecting a damaged pipe, having a new structure, which enables a PVC pipe cut off during excavation work to be repaired by quick and effective connection, and a method for connecting a damaged pipe by using the same. The pipe connector for connecting a damaged pipe, according to the present invention, includes: a connection pipe (10) disposed between PVC pipes (1); and a connection sleeve (20) having both ends coupled to the outer circumferential surfaces of the connection pipe (10) and the PVC pipes (1) so as to connect the connection pipe (10) and the PVC pipes (1), wherein in a state, in which the connection sleeve (20) is fitted to the outside of the PVC pipes (1) or the connection pipe (10), the connection sleeve (20) is disposed between the PVC pipes (1), which are cut at the middle portion thereof, and the connection sleeve (20) slides laterally so as to couple the both ends of the connection sleeve (20) to the outside of the connection pipe (10) and the PVC pipes (1) such that the PVC pipes (1) can be repaired by connecting the connection pipe (10) and the PVC pipes (1) to each other. Therefore, when the PVC pipes (1) are cut off, the PVC pipes (1) can be quickly connected and recovered since the structure is simple and the operation is simple.

Abstract: The invention discloses a high-strength PVC (polyvinyl chloride) pipe, which comprises a PVC layer of an inner layer and a glass fiber layer coated outside the inner layer; the PVC layer is prepared from the following ingredients in parts by weight: 20-30 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of ethylene-propylene methylene copolymer, 10-12 parts of argil, 6-8 parts of a stabilizer, 3-5 parts of quartz sand, 2-3 parts of glass fiber reinforced plastics and 2-3 parts of active carbon. In the high-strength PVC pipe, by intertwining the quartz sand on an outer surface of the pipe, the strength of the pipe is greatly improved, the circumstances such as fracture, rupture and scratch are difficult to appear in the process of using the pipe, and the service lifeof the pipe is prolonged.

Abstract: The invention discloses a PVC pipe. The PVC pipe comprises, by weight, 20-30 parts of PVC resin, 15-20 parts of chlorinated polyethylene, 10-15 parts of EPM, 10-12 parts of argil, 6-8 parts of stabilizers, 3-5 parts of quartz sand, 2-3 parts of glass fiber reinforced plastics and 2-3 parts of activated carbon. The outer surface of the pipe is wound with the quartz sand, so that the intensity of the pipe is improved to the extremely great extent, the pipe is not prone to being broken, cracked, scratched and the like in the use process, and the service life of the pipe is prolonged.

Abstract: The invention discloses a steel belt reinforced PVC pipe which comprises a pipe orifice and inner pipes. A connecting layer is arranged on the outer side wall of the pipe orifice, a plurality of innerpipes are arranged in the pipe orifice, a steel belt layer is arranged in the pipe orifice, and a plurality of inner cushion pipes are arranged in one end of the pipe orifice. The steel belt layer islocated on the outer side of the inner pipes. The diameters of the inner cushion pipes are smaller than the diameters of the inner pipes. A steel belt reinforced PVC pipe manufacturing process comprises the steps of preparation before startup, checking whether an extruder transmission box and a gear box are filled with lubricating oil, checking whether running of a circuit, an air way, a coolingsystem, a mainframe, a traction machine, an ink jet marking machine, a cutting machine, an air compressor and the like is normal or not, and mold installation after determination whether all the machines run normally or not.

Abstract: The invention relates to the technical field of a plastic pipe, in particular to a corrosion-resistant plastic pipe for an air conditioner as well as a preparation method thereof. The plastic pipe comprises a PVC pipe; the outer side of the PVC pipe is connected with a plurality of modified phenolic resin layers through a plurality of U-shaped pieces; a steel wire net is paved along the outer sidesurfaces of the modified phenolic resin layers; the outer side surface of the steel wire net adheres to a polytetrafluoroethylene layer; and the outer side surface of the polytetrafluoroethylene layer adheres to a glass fiber layer. The plastic pipe is convenient to use, the corrosion resistance of the plastic pipe can be improved and the strength of the plastic pipe can be improved, so that theservice life of the plastic pipe is prolonged.

Abstract: The invention relates to a multilayer PVC pipe. The multilayer PVC pipe comprises an upper PVC resin layer, a middle latticed reinforcement layer and a lower plastic thin film layer which are arrangedin sequence. Compared with a traditional PVC pipe, the multilayer PVC pipe has the performance that the strength of extension is high and the like, the lower plastic thin film layer has the excellentwaterproof and antiseptic property, wefts in middle lattices guarantee the bending performance of a pipe material, warps in the middle lattices guarantee the pull-up rate, and the relative density ofthe upper PVC resin layer is small and is equivalent to 1/7-1/4 of that of metal; the electrical insulation property and the chemical stability are excellent; installation and construction are convenient, and maintenance is easy; the unit energy consumption is low, in the extruding process, the temperature is continuously changed, conditions are provided for molding, heat expansion and cold contraction are carried out many times, and materials can be combined more tightly through contraction and expansion.

Abstract: An automatic production control system for a composite pipe comprises following mounting devices of a cold rolling mill, a glue spray machine, a pipeline assembling machine and an injecting machine, wherein the cold rolling mill is used for rolling sheet steel to a steel pipe; the glue spray machine is used for spraying glue between a PRT pipe and the steel pipe to enable the outer portion of thesteel pipe to be bonded with the PRT pipe to form a PRT composite pipe; the pipeline assembling machine is used for assembling a PVC pipe outside the PRT composite pipe to form the composite pipe; andthe injecting machine is used for injecting foaming materials between the PRT composite pipe and the PVC pipe. The advanced equipment is used for assembling the sheet steel, the PRT pipe and the PVCpipe into the composite pipe and injecting the foaming materials, the produced composite pipe integrates multiple excellent properties of steel, PRT, PVC and the foaming materials, and the composite pipe has the advantages of high strength, good plasticity and toughness, corrosion and heat resistance, non-permeability, impact resistance, non-liable deformation and breakage, good heat insulation, excellent dielectric property and the like.

Abstract: The invention relates to the technical field of plastic pipe processing, in particular to PVC pipe cooling water and a preparation method thereof The cooling water comprises a natural water body containing nine ions: Ga2 , K , Mg2 , Mn2 , Fe2 , Fe3 , SO42 HCO3 and Cl On this basis, sodium chloride, potassium silicate, potassium silicate and sodium hypochlorite are added to enhance the solution concentration and the penetrating action of the natural water body to form circulating cooling water for cooling a PVC hot pipe in a water logging mode, so that phenomena that thehot pipe is poor in cooling and the hot pipe is brittle as parts of the hot pipe are not uniformly cooled in the cooling process are avoided Based on the natural water body, sodium chloride, potassium silicate, zinc chloride, sodium hypochlorite and polycarbon alcohol are added to form spraying cooling water for cooling the PVC hot pipe in a sprayed manner, so that the hot pipe cooling efficiencyis improved effectively and phenomena of expansion and the like are prevented

Abstract: The invention provides a PVC pipe composition and a manufacturing method of PVC pipes. The PVC pipe composition is prepared from the following raw materials in parts by weight: 100-200 parts of PVC resin, 2-4 parts of white carbon black, 0.2-0.4 part of zinc oxide, 0.1-0.2 part of magnesium oxide, 0.7-0.8 part of tris-(2,4-di-tert-butyl-pheny)-phosphite, 2-4 parts of coupling agent, 0.01-0.03 partof binding agent, 2-3 parts of filler and 5-6 parts of reinforced fiber. The preparation method of the PVC pipes mainly comprises the following steps: S1, adding the PVC resin, the reinforced fiber and the filler in an exhaust type twin-screw extruder, adding the other component materials after uniformly stirring, and extruding to obtain granular materials; and S2, placing the granular materialsobtained in the S1 in a single-screw pipe extrusion molding machine, performing extrusion molding to obtain pipes, cooling the pipes, and cutting the pipes to obtain the PVC pipes.

Abstract: The invention discloses a tensile-resistant PVC pipe composition The composition comprises PVC, stabilizers, filler, processing aids, lubricants, 12-hydroxy calcium stearate, silicon carbide reinforced ceramic-based composite materials, carbon fibers and glass fibers By means of the tensile-resistant PVC pipe composition, the energy consumption in the process of inspecting and manufacturing PVCpipes can be effectively reduced, the generated manufacturing cost is reduced, the economic loss caused by the damage of the PVC pipes in the installation process is reduced, and the tensile resistance and impact resistance of the pipes are further improved

Abstract: The invention discloses a high-elasticity PVC air pipe. The high-elasticity PVC air pipe is composed of 18 to 22 parts of polyvinyl chloride, 22 to 25 parts of dioctyl phthalate, 3 to 5 parts of an elasticity modifying agent ATR-88, 0.4 to 0.6 part of a calcium-zinc stabilizer, 0.01 to 0.03 part of stearic acid and 0.01 to 0.03 part of hard paraffin. The high-elasticity PVC air pipe provided by the invention has the following advantages: the elasticity of the high-elasticity PVC air pipe is significantly higher than the elasticity of an ordinary PVC pipe; when the high-elasticity PVC air pipeis used as an air pipe, installation and arrangement of the air pipe can be conveniently realized; the high-elasticity PVC air pipe can adapt to use demands under repeated mechanical movements like bending and stretching; meanwhile, high-temperature resistance, cold resistance and bursting pressure resistance of a PVC pipe are improved, so physical properties of the PVC pipe can be effectively improved, and the application range of the PVC pipe is expanded.

Abstract: The invention discloses a connector device for novel plastic polyvinyl chloride (PVC) pipes. The connector device for the novel plastic PVC pipes comprises a frame, wherein a first limiting groove anda second limiting groove are formed in the centers of two sides of the frame; a first PVC pipe is fixedly connected to an inner wall of the first limiting groove; a second PVC pipe is fixedly connected to an inner wall of the second limiting groove; fixing blocks are fixedly connected to two sides of the frame; first silicone pads are fixedly connected to the bottom part of the fixing blocks; thread grooves are formed in two sides of the frame; and a thread frame is in threaded connection to an inner wall of each thread groove. The connector device for the novel plastic PVC pipes provided bythe invention relates to the technical field of pipeline connectors, and solves the problems that according to a currently used PVC pipe connecting manner, a fuse machine is used for connecting so asto be difficult and require a certain skills during an operation process, water leakage is easy to cause due to improper connection, the fuse machine can produce a pungent smell during work so as to cause a harsh operation environment, and pipelines are not favorably replaced and maintained at the later period.

Abstract: This paper is concerned with the investigation of a possible working principle of a microwave sensor for the measurement of water levels in plastic pipes. According to the research, most current sensors for water level measurement require an unobstructed path from the sensor in the water and therefore, the integrity of the pipes, in which water flows, will be compromised. The proposed sensor will work at microwave frequencies to measure the flow in the pipes from the outside. This would be non-invasive and non-intrusive. A beam of microwave energy from an antenna is directed towards a water surface within a pipe and the reflection due to the surface of the water will be isolated and knowledge of the pipe dimensions and properties will allow the depth of water to be calculated. Knowledge of the pipe drop may also allow flow to be estimated. It is observed that at microwave frequencies the reflection from the surface of the water is many times greater than the reflection from the surface of a typical plastic pipe.

Abstract: The invention provides an anti-ageing PVC (Polyvinyl Chloride) pipe and a processing method thereof and relates to the technical field of processing and production of PVC pipes. The anti-ageing PVC pipe produced by the invention has good anti-ageing performance and can be used for preventing the PVC pipe from being aged and becoming fragile after the PVC pipe is used for a long period; the servicelife of the PVC pipe produced by the invention is long and the PVC pipe has relatively good quality including strength, flexibility, wear resistance, flatness, glossiness and the like; high-degree unifying of economic benefits, social benefits and environmental protection benefits is realized.