Water supply pipeline repair material and preparation method thereof

Abstract

The invention discloses a water supply pipeline repair material and a preparation method thereof, and particularly relates to the field of water supply pipeline repair materials. The material comprises an inner membrane material, an anchoring material, a fiber structure material, an impermeable material, a transition material and an outer membrane material. The anchoring layer and the transition layer are tightly bonded, so that the layering phenomenon can be effectively prevented. When bearing complex mechanical actions such as pressure, stretching, bending and twisting, all the layers work cooperatively, the overall shape and structural integrity of the hose are maintained, and therefore the service life of the hose is prolonged.

Description

Technical Field

[0001] The invention relates to the field of water supply pipeline repair materials, and in particular to a water supply pipeline repair material and a preparation method thereof. Background Art

[0002] With the development of urban construction, more and more underground water supply pipelines are laid, and defects in water supply pipelines seriously affect the quality of urban ecological environment and the safety of people's lives and property. In order to ensure the normal progress of urban production and residents' lives, the problem of pipeline defect transformation needs to be solved urgently. Water supply pipeline repair technology can be divided into excavation repair and trenchless repair. Due to the complexity of underground water supply pipelines in the city and the existence of surrounding buildings, the use of trenchless repair technology has less impact on urban life than excavation repair technology. It is mainly used for repair and defect transformation of old pipelines. Among them, trenchless repair UV-CIPP technology has the characteristics of high construction efficiency, fast speed, short construction period and high quality. It has been widely used in foreign water supply pipeline repair defect transformation projects.

[0003] The UV-CIPP process is a green, environmentally friendly, efficient, fast and widely used repair process in the trenchless repair technology of urban water supply pipes. The trenchless repair technology is adopted, the construction time is short, no earthwork needs to be excavated, the construction equipment occupies a small area, and the impact on the surrounding traffic and residents is small, and it basically does not affect the appearance of the city. The UV-CIPP lining technology is not affected by temperature and can be constructed at an ambient temperature of 0℃ to 35℃, with high construction quality. The lining pipe material has the characteristics of wear resistance, corrosion resistance, low flow resistance and high strength. The lining pipe fits tightly with the old water supply pipe and basically does not affect the flow path. The lined water supply pipe can be round, oval, egg-shaped and other cross-sections. The construction cost is low, and the cost advantage is obvious compared with excavation and pipe replacement. The use of UV curing saves energy, has high safety, protects the environment, and meets the requirements of green construction.

[0004] The UV in-situ curing repair process has the advantages of short construction period, no impact on traffic, no damage to original roads, low noise, no dust, resource saving, safety and reliability. The UV in-situ curing repair process covers a wide range of water supply pipeline diseases, the entire video controllability during the repair process is strong, the mechanical indicators of the lining pipe are high, and a single repair can be used for 50 years.

[0005] The UV in-situ curing repair process is to pull the lining hose material soaked in photosensitive resin into the original damaged water supply pipe, inflate the lining hose material to fit tightly against the inner wall of the original damaged water supply pipe, and use UV light to cure and harden the lining hose material to form a firm pipe-in-pipe structure, so that the damaged water supply pipe can be repaired in situ without excavation.

[0006] The main material of the existing UV-curable hose is unsaturated polyester resin, which contains harmful substances, and there is a risk of UV-curable hose leaking from the repaired water supply pipe after curing. The leakable components include any uncured reactive diluent, any solvent residue left in the production of reactive diluent, or any catalyst that may be used in the production of resin. In the known resin system, when repairing the water supply pipe, other small molecular components such as reaction catalysts that are not suitable for human ingestion may leak into the water supply system of the water supply pipe after curing, thereby causing pollution to the water supply pipe.

[0007] Chinese patent CN117146070A, a one-time molded UV-curable hose material for repairing the inner lining of a water supply pipe, includes an outer layer, a structural layer and a barrier layer; the outer layer is the outermost layer of the hose, which is impermeable to UV radiation and also plays a role in preventing puncture; the structural layer is formed by impregnating glass fiber with resin; an anchoring layer is arranged between the barrier layer and the structural layer; the anchoring layer is located inside the structural layer and in contact with the structural layer, and the anchoring layer is combined with the barrier layer by a hot melt. The barrier layer is arranged on the inner side of the structural layer to effectively prevent the UV-curable hose material from being used with a reactive diluent without harmful substances (such as styrene), and the risk of the components of the UV-curable hose being minimized after curing, such as vinyl ester, unsaturated polyester resin, epoxy resin or a mixture thereof, from leaking out from the repaired pipe, thereby ensuring the safety of the water supply pipe after repair. However, this method uses glass fiber, which has insufficient tensile strength; and the glass fiber is easily corroded, and the structural setting of the patent is prone to insufficient adhesion and easy delamination. Summary of the invention

[0008] To this end, the present invention provides a water supply pipeline repair material and a preparation method thereof to solve the above-mentioned problems.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] According to a first aspect of the present invention, a water supply pipe repair material is provided, which comprises an inner membrane material, an anchoring material, a fiber structure material, an anti-permeability material, a transition material and an outer membrane material.

[0011] Further, the inner film material comprises food-grade polyethylene film, polypropylene and titanium dioxide. As an example, preferably food-grade polyethylene (PE) film 40-70%, polypropylene (PP) 20-50% and titanium dioxide 1-10%.

[0012] The titanium dioxide is preferably nano titanium dioxide particles, and the size of the nano particles is between 1-100nm. The gas permeability of this nano composite material is reduced by about 60% compared with traditional barrier materials. It performs well in preventing dissolved oxygen, chlorine and other gases in water from penetrating into the wall of the water supply pipeline, effectively extending the service life of the water supply pipeline, and is particularly suitable for conveying tap water containing corrosive gases.

[0013] Furthermore, the fiber structural material includes carbon fiber or a mixture of carbon fiber and glass fiber.

[0014] Carbon fiber has the characteristics of high strength and high modulus, and its tensile strength can reach 3000-7000MPa, while the tensile strength of glass fiber is generally below 3000MPa. In practical applications, this replacement has increased the structural layer strength of the repair material by about 40%. When subjected to the impact of high-pressure water flow inside the water supply pipe and external soil pressure, it can better maintain the shape and integrity of the water supply pipe.

[0015] Furthermore, the fiber structure material also includes an initiator, a thickener and a vinyl resin. As an example, preferably, the initiator is 0.5-3%, the thickener is 1-5% and the vinyl resin is 40-45%, and the rest is carbon fiber or a mixture of carbon fiber and glass fiber. The price of carbon fiber is relatively high, so in order to save costs, no more than 50% of glass fiber can be added.

[0016] Vinyl resin has more secondary hydroxyl groups, which can improve the wettability and adhesion to fiber structural materials and increase the mechanical strength of the composite reinforcement layer of fiber structural materials. In addition, the molecular ends are cross-linked, so the molecular chain can stretch under stress to absorb external force or thermal shock, showing resistance to micro-cracks or cracking. During production, the fiber structural material composite felt is first folded, and photoinitiator and thickener are added to the vinyl resin. After fully stirring, it is injected into the fiber structural material for rolling. The quality of the rolled hose is inspected by a visual recognition system to ensure that the vinyl resin fully infiltrates the fiber structural material.

[0017] Furthermore, the initiator is azobisisobutyronitrile and / or benzoyl peroxide.

[0018] Furthermore, the thickener is selected from one or more of starch, gum arabic, pectin, gelatin, carboxymethyl cellulose, and methyl cellulose.

[0019] Further, the anti-permeation material comprises an outer felt material. As an example, a food-grade polyethylene (PE) film is preferred.

[0020] Furthermore, the outer film material includes a food-grade polyethylene film and an ultraviolet absorber. As an example, the ultraviolet absorber is preferably selected from polycarbonate, polyimide or nano zinc oxide; and the weight ratio of the ultraviolet absorber to the food-grade polyethylene (PE) is 0.3-1:100.

[0021] Furthermore, the transition material is a thermoplastic elastomer.

[0022] Thermoplastic elastomers have good flexibility and compatibility with the adjacent two layers of materials. In environmental tests with a temperature range of -20°C to 60°C, the material with the transition layer added has a buffering effect, and the stress concentration between the outer layer and the structural layer is significantly alleviated, the overall stability of the material is improved, and there is no interlayer separation problem caused by different thermal expansion coefficients.

[0023] According to the second aspect of the present invention, a repair hose prepared from the above-mentioned water supply pipe repair material is provided, wherein the repair hose comprises an innermost inner membrane layer, the inner membrane layer is bonded to the fiber structure layer via an anchoring layer, the other side of the fiber structure layer is connected to the anti-permeability layer, and the other side of the anti-permeability layer is bonded to the outer membrane layer via a transition layer.

[0024] The inner film layer is 0.5-1.5 mm, preferably 1 mm. In order to blend into the hose body, the surface of the inner film layer close to the fiber structure composite reinforcement layer is anchored and cured. In the process of producing the inner film layer, the drawn polypropylene (PP) felt is hot-melted on one side of the inner film layer. One side of the inner film of the present invention is smooth and directly contacts the tap water, and the other side is felt-like. After curing, it is fully integrated into the carbon fiber composite reinforcement layer and is naturally integrated with the hose body. This layer mainly plays the role of direct contact with the conveying medium. Its thickness must ensure good flexibility and be able to withstand the erosion of the conveying material.

[0025] The anchoring layer is 0.1-0.3 mm, and its main function is to firmly bond the inner membrane layer and the fiber structure layer together. Its thickness only needs to ensure sufficient bonding strength.

[0026] The fiber structure layer is 0.5-3mm. The fiber structure layer is used to provide the main strength support for the hose, and its thickness is determined according to factors such as the pressure the hose needs to withstand. If it is a hose used in a high-pressure environment, the fiber structure layer will be relatively thick, and its strength will be enhanced by winding multiple layers of fibers.

[0027] The anti-permeation layer is a food-grade polyethylene (PE) film (referred to as outer felt), about 0.3-1 mm. This layer is mainly to prevent the medium from penetrating into the outer structure of the hose. The thickness should be able to effectively prevent penetration and at the same time be well combined with the adjacent layers.

[0028] The transition layer is 0.1-0.3mm. It is used to make a smooth transition between the anti-permeation layer and the outer film layer and ensure the bonding performance between the layers.

[0029] The outer film layer is 0.2-0.8mm. The outer film layer mainly protects the internal structure and needs to have a certain degree of wear resistance and weather resistance. Its thickness is determined according to the use environment of the hose. Since the vinyl resin in the carbon fiber composite reinforcement layer is added with a photoinitiator, once it encounters sunlight (including ultraviolet light components), a chemical reaction will occur and solidify. Therefore, the light transmittance of the outer film layer needs to be controlled within 0.5%.

[0030] According to a third aspect of the present invention, a method for preparing a repair hose from the above-mentioned water supply pipeline repair material is provided:

[0031] 1. Inner film layer: food-grade polyethylene film, polypropylene and titanium dioxide. First, mix the food-grade polyethylene film with titanium dioxide to prepare the inner film base material, heat-melt the drawn polypropylene (PP) felt on one side of the base material, and perform anchor curing on the other side of the inner film base material.

[0032] 2. Anchoring layer: The anchoring layer is 50% by weight of polyamide (CAS: 63428-84-2), ethylene-vinyl alcohol copolymer (CAS: 25067-34-9), PBT (CAS: 26062-94-2), and PET (CAS: 25038-59-9).

[0033] 3. Fiber structure layer: carbon fiber (CAS: 7782-42-5), initiator, thickener and vinyl resin (CAS: 9011-13-6); overlap the carbon fiber on both sides according to the width of the inner membrane and ensure that the overlap seams are in different directions, fold the carbon fiber composite felt, add photoinitiator and thickener to the vinyl resin, stir well and then inject into the carbon fiber for rolling, and conduct quality inspection on the rolled hose through the visual recognition system to ensure that the vinyl resin fully impregnates the carbon fiber.

[0034] 4. Anti-permeation layer: food-grade polyethylene (PE) film, which is melted and attached to the other side of the fiber structure layer.

[0035] 5. Transition layer: thermoplastic elastomer.

[0036] 6. Outer film layer: Food grade polyethylene film and ultraviolet absorber are mixed as the outer film layer.

[0037] The food-grade polyethylene (PE) film, thermoplastic elastomer, and outer film are turned up in sequence and welded on both sides with a climbing welding machine to make them into a cylindrical shape, thus forming an inner-lined hose, i.e., a dry hose.

[0038] The present invention has the following advantages:

[0039] The present invention can effectively prevent delamination by tightly bonding the anchor layer and the transition layer. When subjected to complex mechanical effects such as pressure, stretching, bending, and torsion, the various layers work together to maintain the overall shape and structural integrity of the hose, thereby extending the service life of the hose.

[0040] The inner film layer of the present invention can provide a good internal contact surface, which is conducive to the smooth transportation of the medium, and the anti-permeation layer can reliably prevent the leakage of the medium. This greatly improves the safety of the transportation process for hoses that transport dangerous chemicals, flammable and explosive liquids or gases and other media, and reduces the risk of environmental pollution and safety accidents.

[0041] The outer film layer of the present invention effectively protects against external environmental factors (such as ultraviolet rays, chemical corrosion, mechanical damage, etc.), and the materials of each layer cooperate with each other, so that the hose can work normally in harsh natural environments or industrial environments. Whether in high temperature, low temperature, humidity, dryness and other climatic conditions, or in environments with chemical corrosion and physical wear, it can maintain good performance.

[0042] The fiber structure layer of the present invention provides high strength and toughness for the hose, enabling it to withstand high internal pressure and adapt to the shape changes required by different usage scenarios. Such good mechanical properties enable the hose to be widely used in various industries, construction, transportation and other fields to meet different pressure and deformation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0044] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0045] Figure 1 A structural diagram of a repair hose provided in Example 1 of the present invention;

[0046] 1-outer membrane layer; 2-transition layer; 3-anti-permeability layer; 4-fiber structure layer; 5-anchor layer; 6-inner membrane layer;

[0047] Figure 2 A schematic diagram of a curing process of a repair hose provided in Experimental Example 1 of the present invention;

[0048] Figure 3 This is a diagram showing the curing effect of a repair hose provided in Experimental Example 1 of the present invention. DETAILED DESCRIPTION

[0049] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] This embodiment provides a method for preparing a repair hose (each layer structure is as follows Figure 1 shown):

[0052] 1. Inner film layer 1mm: 40g food-grade polyethylene film, 50g polypropylene and 10g nano titanium dioxide (size 5mm). First, mix the food-grade polyethylene film with titanium dioxide to prepare the inner film base material, heat-melt the drawn polypropylene (PP) felt on one side of the base material, and perform anchor curing on the other side of the inner film base material.

[0053] 2. Anchoring layer 0.2 mm: The anchoring layer is 50% by weight of polyamide (CAS: 63428-84-2), ethylene-vinyl alcohol copolymer (CAS: 25067-34-9), PBT (CAS: 26062-94-2), and PET (CAS: 25038-59-9).

[0054] 3. Fiber structure layer 2mm: 47g carbon fiber (CAS: 7782-42-5), 3g initiator (azobisisobutyronitrile), 5g thickener (carboxymethyl cellulose) and 45g vinyl resin (CAS: 9011-13-6); overlap the carbon fiber on both sides according to the width of the inner membrane and ensure that the overlap seams are in different directions, fold the carbon fiber composite felt, add photoinitiator and thickener to the vinyl resin, stir well and then inject into the carbon fiber for rolling, and conduct quality inspection of the rolled hose through the visual recognition system to ensure that the vinyl resin fully impregnates the carbon fiber.

[0055] 4. Anti-permeation layer 0.5 mm: 10 g of food-grade polyethylene (PE) film, which is melted and attached to the other side of the fiber structure layer.

[0056] 5. Transition layer 0.2mm: thermoplastic elastomer 20g.

[0057] 6. Outer film layer 0.5 mm: 10 g of food-grade polyethylene film and 3 g of ultraviolet absorber (nano zinc oxide) are mixed as the outer film layer.

[0058] The food-grade polyethylene (PE) film, thermoplastic elastomer, and outer film are turned up in sequence and welded on both sides with a climbing welding machine to make them into a cylindrical shape, thus forming an inner-lined hose, i.e., a dry hose.

[0059] 7. Vacuum introduction of resin (vinyl resin): convey the dry hose to the rubber rolling platform through the main belt of the rubber rolling line. Use a paper cutter to open the dry hose about 3 cm every 8 meters or so. Use a vacuum pump to vacuum the water supply pipe branch. First, extract the air in the lining hose. When the negative pressure reaches about 0.08Mpa, stop vacuuming and weld the opening with a climbing welder. Before vacuum introduction, in order to prevent the resin (containing photoinitiator) from being exposed to light, first use a gear pump to pump the resin into the intermediate tank. A water supply pipe connection interface is set at the bottom of the resin barrel. Use a vacuum pump to suck the material into the intermediate tank. The resin and thickener are simultaneously pumped into the main water supply pipe with a plunger pump. A static mixer is set in the water supply pipe. After the materials are mixed, they enter the filling process. The mixed resin is poured into the dry hose by using the pouring head of the glue injection machine on the glue rolling line, and then penetrated into the carbon fiber product. The worker uses a paper cutter to make an opening on the side of the dry hose. Generally, a side opening is set every 40m-50m, and the opening is about 15cm. The pouring head of the glue injection machine is extended into the dry hose for glue injection. The amount of glue injection varies from 3mm to 16mm according to the structural layer, and the computer is used to control the amount of glue injection.

[0060] 8. Rubber rolling: Use a series of rollers on the roller to continuously roll the resin in the lining hose from one side to the other to ensure that the resin evenly soaks the carbon fiber cloth. The rolling parameters are controlled by a computer. After the rubber rolling is completed, use a handheld sealing machine to seal the ends.

[0061] Example 2

[0062] This embodiment provides a method for preparing a repair hose:

[0063] 1. Inner film layer 0.5mm: 65g food-grade polyethylene film, 30g polypropylene and 5g nano titanium dioxide (size 50mm). First, mix the food-grade polyethylene film with titanium dioxide to prepare the inner film base material, heat-melt the drawn polypropylene (PP) felt on one side of the base material, and perform anchor curing on the other side of the inner film base material.

[0064] 2. Anchoring layer 0.1 mm: The anchoring layer is 50% by weight of polyamide (CAS: 63428-84-2), ethylene-vinyl alcohol copolymer (CAS: 25067-34-9), PBT (CAS: 26062-94-2), and PET (CAS: 25038-59-9).

[0065] 3. Fiber structure layer 0.5mm: 58.5g of carbon fiber (CAS: 7782-42-5), 0.5g of initiator (azobisisobutyronitrile), 1g of thickener (carboxymethyl cellulose) and 40g of vinyl resin (CAS: 9011-13-6); overlap the carbon fiber on both sides according to the width of the inner membrane and ensure that the overlap seams are in different directions, fold the carbon fiber composite felt, add photoinitiator and thickener to the vinyl resin, stir well and then inject into the carbon fiber for rolling, and conduct quality inspection of the rolled hose through the visual recognition system to ensure that the vinyl resin fully impregnates the carbon fiber.

[0066] 4. Anti-permeation layer 0.3 mm: 10 g of food-grade polyethylene (PE) film, which is melted and attached to the other side of the fiber structure layer.

[0067] 5. Transition layer 0.1mm: thermoplastic elastomer 20g.

[0068] 6. Outer film layer 0.2 mm: 100 g of food-grade polyethylene film and 3 g of ultraviolet absorber (nano zinc oxide) are mixed as the outer film layer.

[0069] The food-grade polyethylene (PE) film, thermoplastic elastomer, and outer film are turned up in sequence and welded on both sides with a climbing welding machine to make them into a cylindrical shape, thus forming an inner-lined hose, i.e., a dry hose.

[0070] 7. Vacuum introduction of resin (vinyl resin): convey the dry hose to the rubber rolling platform through the main belt of the rubber rolling line. Use a paper cutter to open the dry hose about 3 cm every 8 meters or so. Use a vacuum pump to vacuum the water supply pipe branch. First, extract the air in the lining hose. When the negative pressure reaches about 0.08Mpa, stop vacuuming and weld the opening with a climbing welder. Before vacuum introduction, in order to prevent the resin (containing photoinitiator) from being exposed to light, first use a gear pump to pump the resin into the intermediate tank. A water supply pipe connection interface is set at the bottom of the resin barrel. Use a vacuum pump to suck the material into the intermediate tank. The resin and thickener are simultaneously pumped into the main water supply pipe with a plunger pump. A static mixer is set in the water supply pipe. After the materials are mixed, they enter the filling process. The mixed resin is poured into the dry hose by using the pouring head of the glue injection machine on the glue rolling line, and then penetrated into the carbon fiber product. The worker uses a paper cutter to make an opening on the side of the dry hose. Generally, a side opening is set every 40m-50m, and the opening is about 15cm. The pouring head of the glue injection machine is extended into the dry hose for glue injection. The amount of glue injection varies from 3mm to 16mm according to the structural layer, and the computer is used to control the amount of glue injection.

[0071] 8. Rubber rolling: Use a series of rollers on the roller to continuously roll the resin in the lining hose from one side to the other to ensure that the resin evenly soaks the carbon fiber cloth. The rolling parameters are controlled by a computer. After the rubber rolling is completed, use a handheld sealing machine to seal the ends.

[0072] Example 3

[0073] This embodiment provides a method for preparing a repair hose:

[0074] 1. Inner film layer 1.5mm: 70g food-grade polyethylene film, 29g polypropylene and 1g nano titanium dioxide (size 100mm). First, mix the food-grade polyethylene film with titanium dioxide to prepare the inner film base material, heat-melt the drawn polypropylene (PP) felt on one side of the base material, and perform anchor curing on the other side of the inner film base material.

[0075] 2. Anchoring layer 0.3 mm: The anchoring layer is 50% by weight of polyamide (CAS: 63428-84-2), ethylene-vinyl alcohol copolymer (CAS: 25067-34-9), PBT (CAS: 26062-94-2), and PET (CAS: 25038-59-9).

[0076] 3. Fiber structure layer 1mm: 50g of carbon fiber (CAS: 7782-42-5) and glass fiber (ratio of 4:1), 3g of initiator (benzoyl peroxide), 5g of thickener (methyl cellulose) and 42g of vinyl resin (CAS: 9011-13-6); overlap the carbon fiber on both sides according to the width of the inner membrane and ensure that the overlap seams are in different directions, fold the carbon fiber composite felt, add photoinitiator and thickener to the vinyl resin, stir well and then inject into the carbon fiber for rolling, and conduct quality inspection of the rolled hose through the visual recognition system to ensure that the vinyl resin fully impregnates the carbon fiber.

[0077] 4. Anti-permeability layer 1mm: 10g of food-grade polyethylene (PE) film, which is melted and attached to the other side of the fiber structure layer.

[0078] 5. Transition layer 0.3mm: thermoplastic elastomer 20g.

[0079] 6. Outer film layer 0.8 mm: 1000 g of food-grade polyethylene film and 3 g of ultraviolet absorber (nano zinc oxide) are mixed as the outer film layer.

[0080] The food-grade polyethylene (PE) film, thermoplastic elastomer, and outer film are turned up in sequence and welded on both sides with a climbing welding machine to make them into a cylindrical shape, thus forming an inner-lined hose, i.e., a dry hose.

[0081] 7. Vacuum introduction of resin (vinyl resin): convey the dry hose to the rubber rolling platform through the main belt of the rubber rolling line. Use a paper cutter to open the dry hose about 3 cm every 8 meters or so. Use a vacuum pump to vacuum the water supply pipe branch. First, extract the air in the lining hose. When the negative pressure reaches about 0.08Mpa, stop vacuuming and weld the opening with a climbing welder. Before vacuum introduction, in order to prevent the resin (containing photoinitiator) from being exposed to light, first use a gear pump to pump the resin into the intermediate tank. A water supply pipe connection interface is set at the bottom of the resin barrel. Use a vacuum pump to suck the material into the intermediate tank. The resin and thickener are simultaneously pumped into the main water supply pipe with a plunger pump. A static mixer is set in the water supply pipe. After the materials are mixed, they enter the filling process. The mixed resin is poured into the dry hose using the glue injection machine pouring head of the glue rolling line, and then penetrates into the carbon fiber + glass fiber composite product. Workers use a paper cutter to make an opening on the side of the dry hose. Generally, a side opening is set every 40m-50m, and the opening is about 15cm. The pouring head of the glue injection machine is extended into the dry hose for glue pouring. The amount of glue poured varies from 3mm to 16mm depending on the structural layer, and the computer is used to control the amount of glue poured.

[0082] 8. Rubber rolling: Use a series of rollers on the roller to continuously roll the resin in the lining hose from one side to the other to ensure that the resin evenly infiltrates the composite fiber cloth. The rolling parameters are controlled by a computer. After the rubber rolling is completed, use a handheld sealing machine to seal the ends.

[0083] Comparative Example 1

[0084] This comparative example provides a method for preparing a repair hose:

[0085] The fiber structure of this comparative example adopts carbon fiber: glass fiber = 4:6, and the rest is exactly the same as Example 2.

[0086] Comparative Example 2

[0087] This comparative example provides a method for preparing a repair hose:

[0088] The fiber structure of this comparative example adopts pure glass fiber, and the rest is exactly the same as that of Example 2.

[0089] Comparative Example 3

[0090] This comparative example provides a method for preparing a repair hose:

[0091] This comparative example does not use a transition layer, and the rest is completely consistent with Example 2.

[0092] Experimental example

[0093] This experimental example provides a UV-CIPP water supply pipeline repair construction process provided in Example 2:

[0094] Before construction, water is blocked upstream and downstream, and the original water supply pipeline is pre-treated by dredging and cleaning. CCTV is used to conduct internal inspections until the repair conditions are met. After the on-site staff confirms that the water supply pipeline has the conditions for construction, pull in the bottom membrane that plays a lubricating and protective role, and fix it tightly at the bottom of the starting inspection well. Pull in the lining hose material and install ties at both ends. Inflate the lining hose, and after the hose is slowly propped up, put it in the ultraviolet light curing equipment, turn on the ultraviolet light, set the lamp frame travel parameters according to the manual, and start intelligent curing. The process of the lamp frame moving is the material curing process. At the same time, the curing condition inside the hose is observed through the display of the curing equipment. After the curing is completed, remove the tying head, cut off the excess material at the pipe mouth, pull out the inner membrane, complete the pipe mouth treatment, use CCTV to conduct internal inspections again, and save the repair data. The curing process is like Figure 2 As shown, after curing Figure 3 shown.

[0095] According to GB / T1040.4-2006 "Determination of tensile properties of plastics", GB / T11547-2008 "Determination of resistance of plastics to liquid chemical reagents", GB / T17219-1998 "Safety evaluation standard for drinking water distribution equipment and protective materials", GB / T5750.6-2006 "Standard test methods for drinking water - Metal indicators", GB / T5750.4-2006 "Standard test methods for drinking water - Sensory properties and physical indicators", GB / T17219-1998 "Safety evaluation standard for drinking water distribution equipment and protective materials", GB / T5750.10-2006 "Standard test methods for drinking water - Disinfection by-product indicators", GB / T5750.8-2006 "Standard test methods for drinking water - Organic indicators". The test results are shown in Tables 1 and 2.

[0096] Table 1 Mechanical properties test results of Example 2 products

[0097]

[0098]

[0099] Table 2 Example 2 Product Biochemical Performance Test Results

[0100]

[0101]

[0102] It can be seen from Table 1 and Table 2 that the repair material provided by the present invention has excellent comprehensive properties.

[0103] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A water supply pipeline repair material, characterized in that: The materials include inner membrane material, anchoring material, fiber structure material, anti-permeability material, transition material and outer membrane material.

2. A water supply pipeline repair material according to claim 1, characterized in that: The inner film material comprises food-grade polyethylene film, polypropylene and titanium dioxide.

3. A water supply pipeline repair material according to claim 1, characterized in that: The fiber structural material includes carbon fiber or a mixture of carbon fiber and glass fiber.

4. A water supply pipeline repair material according to claim 3, characterized in that: The fiber structure material further comprises an initiator, a thickener and a vinyl resin.

5. A water supply pipeline repair material according to claim 4, characterized in that: The initiator is azobisisobutyronitrile and / or benzoyl peroxide.

6. A water supply pipeline repair material according to claim 4, characterized in that: The thickener is selected from one or more of starch, gum arabic, pectin, gelatin, carboxymethyl cellulose and methyl cellulose.

7. The water supply pipeline repair material according to claim 1, characterized in that: The barrier material comprises an outer felt material.

8. The water supply pipeline repair material according to claim 1, characterized in that: The outer film material comprises a food-grade polyethylene film and an ultraviolet absorber.

9. The water supply pipeline repair material according to claim 1, characterized in that: The transition material is a thermoplastic elastomer.

10. A repair hose made from any one of the water supply pipeline repair materials of claims 1-9, characterized in that: The repair hose comprises an innermost inner film layer, the inner film layer is bonded to the fiber structure layer via an anchoring layer, the other side of the fiber structure layer is connected to the anti-permeation layer, and the other side of the anti-permeation layer is bonded to the outer film layer via a transition layer.

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