Abstract: The invention provides a method for reinforcing a concrete column by utilizing a PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe and belongs to the technical field of civil engineering. The method is suitable for maintaining and reinforcing the concrete columns in civil buildings, industrial plants and bridge structures. By mainly aiming at the reinforced concrete column, a PVC pipe is sheathed outside the concrete column, a reinforcing steel bar is configured in the PVC pipe, FRP cloth is wound outside the PVC pipe to form restraint action on the concrete column with the PVCpipe, and the internal pressure of the PVC pipe sheathed outside should reach above 1Mpa. The FRP cloth can adopt a carbon fiber composite material, a glass fiber composite material or an aramid fiber composite material. Compared with the traditional reinforcing method, the method for reinforcing the concrete column by utilizing the PVC-FRP pipe has the advantages that the reinforced concrete column is high in bearing capacity, small in cross section size and good in ductility and durability; and the method is convenient to construct, low in construction price and the like.

Abstract: The invention relates to a production method of a PVC (polyvinyl chloride) threading pipe with high impact resistance, belonging to the field of the production of PVC pipe materials. The PVC threading pipe with strong impact resistance is produced by the following raw materials in parts by weight: 100 parts of PVC, 20 parts of light calcium carbonate, 0.6-1.0 part of stearic acid, 0.6-1.0 part of paraffin wax, 6-10 parts of impact modifier ACM-24 and 3-5 parts of lead salt stabilizer, wherein the impact modifier ACM-24 is a PVC impact modifier produced by Shandong RIKE CHEM company. The pipe material of the PVC threading pipe with high impact resistance can facilitate plasticization, enhance dispersion of inorganic matters and processing flowability of PVC melts in a process of processing PVC products, improve the low temperature impact strength of the products, reinforce the tensile strength, increase the breaking elongation rate, and change the shortcomings of good flexibility and low hardness of the PVC products when the chlorinated polyethylene is used; and in the production method of the PVC threading pipe, after the impact modifier ACM-24 is used, the cold bending property, the impact strength and the flat pressure of the produced pipe are remarkably enhanced.

Abstract: Results of load capacity tests of concrete pipes DN 200 and 300 and vitrified clay pipes DN 200, 250 and 300 with liners and without them were shown together with results of ring stiffness tests of PVC pipes DN 200, 250 and 315 and CIPP liners DN 200, 250 and 315. All pipes and liners used to produce samples were brand new. The tested liners were made of polyester tube saturated with epoxy resin. Preliners were not installed between liners and pipes. The liners were introduced to the pipes using compressed air and cured with hot water. Main aim of the research was to find out if there is any correlation between roughness of the pipe surface (depending on the pipe material) and load capacity growth after pipe rehabilitation due to the sticky properties of the resin used for tube impregnation. Another subject discussed in this paper is the influence of adhesion level between liner and PVC pipe to ring stiffness growth of this pipe. Relationship between adhesion level and growth of load capacity/ring stiffness will be proven. Adhesion level should be taken into consideration when designing the reconstructive liner designed not only to seal and protect the pipeline, but also to strengthen construction of the pipe.

Abstract: The invention discloses a special material for PVC pipes and a preparation method thereof. The special material for PVC pipes of the invention comprises PVC resin, butadiene acrylonitrile rubber/nanometer calcium carbonate composite powder rubber, chlorinated polyethylene, a heat stabilizer, a lubricant and a coloring agent. PVC pipes prepared by the special material of the invention completely overcomes the disadvantage of poor anti-impact strength of PVC-U pipes, has good toughness, can maintain high strength, rigidity and heat resistance, is widely applicable to water supply pipeline systems and pipeline systems for mines, has higher security and environment adaptability than PVC-U pipes, and is suitable for popularization and application.

Abstract: A closed-loop heat exchanger pipework cleaning apparatus includes a water conditioning apparatus and a pipework conditioning apparatus. The water conditioning apparatus is adapted to receive water and to remove particulate contaminants from the water and to kill microorganisms in the water, to produce conditioned water, and to deliver the conditioned water into a closed-loop pipework system of a heat exchanger until the closed-loop pipework system is substantially full of water. The pipework conditioning apparatus is adapted to receive a proportion of the water circulating through the closed-loop pipework system and to remove further particulate contaminants from the water to produce cleaned water, and to return the cleaned water into the closed-loop pipework system.

Abstract: Pipes are found in almost all buildings and constructions where they are used to convey fluid to a desired location. Liquid containing foreign objects and impurities will sometimes creates unintentional built up or clog obstruction along the interior surface of the pipeline. This phenomenon may affect the fluid flow within the pipe. This work analyzed the impact of different blockage sizes inside a clear Polyvinyl Chloride (PVC) circular pipe using vibration measurement. Observations were made on the fluid flow patterns during the flow. This work encompasses the correlation between blockage thickness inside a circular pipe and vibration parameters.

Abstract: The invention discloses a method for repairing a water seepage crack of a polyvinyl chloride (PVC) pipe joint, and belongs to the technical field of PVC pipes. The method comprises the following steps of: (1) wiping dripped water by using dry cloth, performing repair welding on a pipe by using a PVC hot wind welding gun quickly, and winding and filling a staggered platform between the pipe joint and the outer wall of the pipe by spinning glass wool cloth to form a gentle slope; (2) brushing a layer of adhesive on the surface of the glass wool cloth; (3) surrounding the pipe on which the adhesive is brushed by using the glass wool cloth with a certain area, flatly brushing by using a hair brush, brushing a layer of resin blender, and soaking the glass wool cloth; (4) repeating the step (3); and (5) covering a layer of aluminum-foil paper outside the glass wool cloth. By the method, water-containing operation can be performed; and the method has the advantages of quickly and conveniently repairing the crack, along with reliable quality, capability of reducing economic losses caused by production halt and the like.

Abstract: The utility model relates to an auxiliary device for observing the water level of a seepage line in a tailings pond. The auxiliary device is characterized by consisting of a PVC (polyvinyl chloride) pipe section at the upper part, a water filter pipe section connected with the PVC pipe section through a nut, a metal steel ingot arranged at the lower part of the water filter pipe section and a protection sleeve pipe arranged at the outer side of a water filter pipe, wherein a stainless steel protection pipe is arranged at the outer side of the part of the PVC pipe section, and the part of the PVC pipe section is exposed on the ground; a dustproof cover is arranged at the end part of the stainless steel protection pipe; and the water filter pipe section consists of a PVC pipe with outer threads at the two ends and water penetrating holes uniformly formed in the middle, a geotextile wrapped at the outer side of the PVC pipe, and a zinc-coated steel wire net wrapped at the outer side of the geotextile. The auxiliary device has the beneficial effects as follows: an observation device is mounted on a dam body of the tailings pond; as the observation mode of the observation device belongs to manual observation and the observation device is easy to operate, the observed water level error is small, the water level change of the seepage line in the dam body can be regularly observed in time, the check and verify design can be conveniently performed and the tailings pond can be better utilized and managed.

Abstract: The invention provides a preparation technology for a solar energy-saving PVC foamed pipe. An extruded PE-X (Cross Linked polyethylene) pipe is used as an inner core, PVC foamed pipe is coated outside as the thermal-insulation energy-saving material to extrude out the outer-coating cold-resistant anti-aging PVC pipe, wherein the production technology comprises such following processes as: coating PVC foamed pipe outside as the thermal-insulation energy-saving material after the inner core PE-X pipe is extruded out and cooled from an extruder die head; and then coating the cold-resistant anti-aging PVC pipe outside, and the like. The solar energy-saving PVC foamed pipe acquired from the preparation technology has the characteristics of excellent thermal-insulation energy-saving performances, a long service life, a low price and the like. The prepared pipe is unbroken even the liquid-resistant pressure reaches 6.0 MPa, and the PVC foamed pipe has a density reaching 0.7g/m3, and the 0-level flame retardation.

Abstract: The utility model relates to a PVC (Polyvinyl Chloride) water discharging pipe. The PVC water discharging pipe comprises a PVC pipe body, wherein the PVC pipe body is internally provided with a metal wire net layer; and a coating layer is coated on the outer surface of the PVC pipe body. The PVC water discharging pipe has the advantages that the PVC pipe body is internally provided with the metal wire net layer, so that the structural strength of the PVC water discharging pipe is greatly enhanced; and simultaneously, since one coating layer is coated, the wear resistance of the PVC pipe body is good.

Abstract: The utility model relates to a PVC-M (polyvinyl chloride-M) high-impact water supply pipe which comprises a high-impact PVC pipe body, wherein a plurality of reinforcing steel bars are arranged in the high-impact PVC pipe body at equal intervals. According to the PVC-M high-impact water supply pipe, the reinforcing steel bars are arranged in the high-impact PVC pipe body, so that the pipe is stronger in impact resistance, has less possibility of being damaged, and is safer and more reliable to use.

Abstract: The utility model relates to a PVC (Poly Vinyl Chloride) gridding rib pipe which can efficiently increase the strength of the pipe wall of the traditional PVC pipe. The PVC gridding rib pipe comprises a PVC pipe, wherein multiple circles of raised circular ribs are equidistantly distributed on the pipe wall of the PVC pipe; and a plurality of horizontal pulling ribs are arranged between the circular rib and the circular rib. The PVC gridding rib pipe has the advantages that: (1) the compression strength of the pipe wall is high and a packing layer covered on the pipe wall is prevented from being crushed in a use process, and (2) the rigidity and toughness of the PVC pipe are fundamentally improved, and the PVC pipe is avoided being broken.

Abstract: A water controllable ground writing pen comprises a pen head, a bottle body, a PVC pipe, a water storage tank, a hand lever and other components, wherein a main pipe is mounted in the water storage tank; a plurality of small holes communicated with the water storage tank are formed in the wall of the main pipe; the upper end of the main pipe is connected with the hand lever through an upper PVC sleeve inner joint; the lower end of the main pipe is connected with the PVC pipe through a PVC sleeve straight joint; the other end of the PVC pipe with a flow regulator is connected with the bottle body; the pen head is fixed at the lower end of the bottle body; a soft plastic water dripping pipe is arranged in the middle of the flow regulator; the lower end of the soft plastic water dripping pipe extends into the bottle body; the upper end of the soft plastic water dripping pipe extends into the main pipe after penetrating sealing material in the PVC sleeve straight joint; and the opening and the closing of the soft plastic water dripping pipe are controlled through the flow regulator. A person using the ground writing pen can exercise while practicing calligraphy; the ground writing pen can be disassembled into three sections, so as to facilitate carrying; the operation of dipping water is avoided; and water flow can be controlled and regulated.

Abstract: PURPOSE: A removable post-tensioned soil nailing structure and a construction method of a removable post-tensioned soil nailing using the same are provided to improve cost-efficiently construct a post-tensioned soil nailing by improving frictional resistance CONSTITUTION: A removable post-tensioned soil nailing structure comprises a fixed end, a PVC(polyvinyl chloride) pipe, and a removable nail body The fixed end is used as an anchorage when post-tension is applied The PVC pipe separates a grouting body from a deformed bar

Abstract: The invention relates to an auxiliary device for observing the water level by a tailing pond saturation line and a construction method. The auxiliary device is characterized by comprising a PVC (Polyvinyl Chloride) pipe section at the upper part, a water filter pipe section connected with the PVC pipe section through a nut, and a metal steel ingot arranged at the lower part of the water filter pipe section, wherein a stainless steel protection pipe is arranged at the outer side of a ground exposing part of the PVC pipe section; a dustproof cover is arranged at the end part of the stainless steel protection pipe; the water filter pipe section is composed of a PVC pipe of which two ends are provided with outer threads and the middle part is uniformly provided with permeable holes, geotextile which is cladded on the outer side of the PVC pipe, and a galvanized steel wire gauze which is cladded on the outer side of the geotextile. The auxiliary device provided by the invention has the beneficial effects that: an observation device is arranged on a tailing pond dam body; because the observation mode of the observation device belongs to manual observation, the operation is simple and the numerical error of observed water level is small, the change of the water level of the saturation line inside the dam body can be timely observed at the fixed period so as to check, verify, design, better apply and manage the tailing pond.

Abstract: For water and sewer pipes, PVC is considered to be one of the best row materials. Due to its physical, chemical and industrial significant properties, PVC is commercially invited to be in the first position. Many other traditional raw materials; e.g. iron, concrete, polyethylene and vitrified clay (VC), are coming in second position. This work is conducted to study the tensile properties of two different types of PVC raw materials (named as gray and white) for water pipe manufacturing by implementing different test conditions. The samples were prepared by cutting off the pipe to an individual cross sectional size rings. Afterward, they were softened smoothly by heating the ring samples to obtain flat standard tensile test specimen. The influence of strain rate (crosshead speed), temperature and UV radiation on the tensile properties of PVC pipe’s row material were investigated. The selected experimental test temperatures are (28℃, 50℃ and 70℃), the selected crosshead speeds are (5, 50 and 100 mm/min) and the UV treatment exposure times are (168, 408, 744 and 1080) hours. The result shows that the gray PVC pipes have tensile strength greater than white PVC pipes. The yield stress and modulus of elasticity are directly proportion to strain rate and inversely proportion to the treatment temperature of both PVC samples. However, the fracture strain was increased with temperature and decreased with strain rate. UV treatment didn’t show a significant effect on the yield stress and modulus of elasticity. This is an indication of PVC long time stability.