CN115199826A - Corrosion-resistant PVC pipe - Google Patents

Abstract

The invention provides a corrosion-resistant PVC pipe which comprises a corrosion-resistant pipe body, wherein the corrosion-resistant pipe body comprises a PVC pipe base layer, an inner waterproof layer, a stretching layer, a side compression-resistant layer, an anticorrosive layer, a drying layer and a wear-resistant outer layer. The stretching layer is arranged, so that the opening of the corrosion-resistant pipe body has good opening or condensation performance, and the pipe fitting is prevented from being torn when being installed; the lateral compression resistant layer is arranged, so that the lateral compression resistant performance of the buffer is good; the corrosion resistance of the corrosion-resistant pipe body is improved by arranging the corrosion-resistant layer; the drying layer is arranged, so that the flame-retardant effect on the pipeline can be achieved, the heat insulation and the heat preservation can be performed on the water source in the pipeline, the influence on the water quality in the pipeline caused by outdoor exposure can be avoided, and meanwhile, the moisture can be effectively absorbed to achieve the moisture-proof effect; the rigidity and the compressive strength of the outer surface of the corrosion-resistant pipe body are improved, the wear resistance is good, and the wear is not easy to wear.

Description

A corrosion-resistant PVC pipe

technical field

The invention relates to the technical field of PVC pipes, in particular to a corrosion-resistant PVC pipe.

Background technique

With the development of science and technology, PVC materials are also widely used in many fields, such as the shell packaging of products and the corresponding dredging pipes, most of the PVC pipes in the sewer pipes. During the long-term use process, the surface of the PVC pipes is worn out. , affecting the service life of the PVC pipe, and it is easy to corrode and rot in the harsh use environment, which will seriously affect the safety of the pipeline.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the present invention proposes a corrosion-resistant PVC pipe to more precisely solve the above-mentioned problems.

The present invention is achieved through the following technical solutions:

The present invention provides a corrosion-resistant PVC pipe, including a corrosion-resistant pipe body, the corrosion-resistant pipe body includes a PVC pipe base layer, and an inner wall of the PVC pipe base layer is provided with an inner waterproof layer, and the inner waterproof layer is preferably an acrylic waterproof coating , the outer wall of the PVC pipe base is provided with a tensile layer, the outer wall of the tensile layer is provided with a side compression layer, the outer wall of the side compression layer is provided with an anti-corrosion layer, and the outer wall of the anti-corrosion layer is provided with a drying The outer wall of the drying layer is provided with a wear-resistant outer layer, the tube wall of the tensile layer is an "S"-shaped curved corrugated tube wall, and there are multiple buffer air channels inside the side compression layer. , and the multiple buffer air passages are arranged in an annular array along the axis of the corrosion-resistant pipe body.

Further, an elastic core is embedded in the inner groove of the wrinkled tube wall of the stretching layer, the elastic core is preferably a polymer polymer core, and the oil-containing polymer polymer core is nylon-66, nylon -6. Any one of polypropylene, etc.

Further, a tensile wire core is embedded in the outer groove of the corrugated tube wall of the stretching layer, and the tensile wire core is a thin copper wire with a diameter of 0.5-1 mm.

Further, the PVC pipe base layer is integrally formed with a first supplementary strip at the position of the inner groove of the corrugated pipe wall corresponding to the tensile layer, and the first supplementary strip is in close contact with the elastic core.

Further, a second supplementary strip is integrally formed on the inner wall of the side compression layer corresponding to the outer groove of the corrugated tube wall of the tensile layer, and the second supplementary strip is in close contact with the tensile core.

Further, the anti-corrosion layer is composed of an elastic fiber woven mesh layer and polytetrafluoroethylene, and at least two or more elastic fiber woven mesh layers are impregnated with a polytetrafluoroethylene material to form an anti-corrosion layer.

Further, the drying layer is composed of an asbestos mesh layer and a synthetic resin emulsion, and at least two or more asbestos mesh layers are dipped in a synthetic resin emulsion type moisture-proof and mildew-proof coating to form a drying layer.

Further, the wear-resistant outer layer is preferably a composite layer of quartz sand rubber, which is formed by mixing 10-18% quartz sand into the wear-resistant rubber, and the particle size of the quartz sand is 100-200 mesh.

Further, the shape of the incision of the buffer airway is preferably one or a combination of two or more of circle, ellipse or oval, and the buffer airway is preferably spirally wound along the side pressure-resistant layer.

Further, between the PVC pipe base layer and the tensile layer, between the tensile layer and the side compression layer, between the side compression layer and the anti-corrosion layer, between the anti-corrosion layer and the drying layer, between the drying layer and the wear-resistant outer layer. There is an ethylene copolymer adhesive layer between the layers, and the ethylene copolymer adhesive layer is preferably an ethylene-vinyl acetate copolymer adhesive layer, an ethylene-ethyl acrylate copolymer adhesive layer, an ethylene-acrylic acid copolymer adhesive layer, etc. any of them A sort of.

Beneficial effects of the present invention:

1. In the present invention, a tensile layer is provided so that the nozzle of the corrosion-resistant pipe body has good opening or condensation performance, and the nozzle is prevented from tearing when the pipe is installed; the side compression layer is provided with good buffering and anti-side compression performance. ; The anti-corrosion layer is provided to improve the corrosion resistance of the corrosion-resistant pipe body; the drying layer can play a flame retardant role in the pipeline, and at the same time, the water source in the pipeline can be insulated to avoid outdoor exposure and affect the water quality in the pipe. At the same time, it can effectively absorb moisture to achieve the effect of moisture resistance; the rigidity and compressive strength of the outer surface of the corrosion-resistant pipe body are improved, and the wear resistance is good and not easy to wear;

2. In the present invention, the outer wall of the PVC pipe base layer is provided with a first supplementary strip that matches the inner groove of the corrugated pipe wall of the tensile layer, and the inner wall of the side compression layer is provided with the outer groove of the corrugated pipe wall of the tensile layer. It can ensure that the internal structure of the corrosion-resistant pipe body is tight, and at the same time increase its contact area, so that the phenomenon of degumming and cracking between layers is not easy to occur;

3. The shape of the buffer airway incision in the side compression layer of the present invention adopts an arc shape. During the extrusion process of the side compression layer, the inner wall of the buffer airway is not easy to crack, and has good elastic reset performance. To ensure the anti-buffering effect of the side compression layer, the buffer air channel is preferably spirally wound along the side compression layer. When dealing with the extrusion force on one side of the corrosion-resistant pipe body, it can be stressed by multiple buffer air passages at the same time, which has better anti-buffer performance.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the sectional view of the structure of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2 .

In the figure: 1. Corrosion-resistant pipe body; 101, PVC pipe base layer; 1011, First supplementary strip; 102, Inner waterproof layer; 103, Tensile layer; 1031, Elastic core; 1032, Tensile core; 104, Side compression layer; 1041, buffer airway; 1042, second supplementary strip; 105, anti-corrosion layer; 106, drying layer; 107, wear-resistant outer layer.

Detailed ways

In order to describe the technical solutions of the present invention more clearly and completely, the present invention is further described below with reference to the accompanying drawings.

Please refer to FIG. 1 to FIG. 3 , the present invention proposes a corrosion-resistant PVC pipe, which includes a corrosion-resistant pipe body 1, and the corrosion-resistant pipe body 1 includes a PVC pipe base layer 101. The inner wall of the PVC pipe base layer 101 is provided with an inner waterproof layer 102. The waterproof layer 102 is preferably an acrylic waterproof paint, which can effectively prevent the leakage of the transported water inside the corrosion-resistant pipe body 1 .

A tensile layer 103 is provided close to the outer wall of the PVC pipe base layer 101, and the pipe wall of the tensile layer 103 is an "S"-shaped curved corrugated pipe wall, so that the nozzle of the corrosion-resistant pipe body 1 has a good opening or The condensation performance is to avoid tearing of the nozzle when the flange or some plugs are installed and connected. The elastic core 1031 is embedded in the inner groove of the corrugated pipe wall of the tensile layer 103, and the elastic core 1031 is preferably a polymer Polymer core wire, oil-containing polymer polymer core wire is selected from any one of nylon-66, nylon-6, polypropylene, etc., so that the corrosion-resistant pipe body 1 has good bending and tensile elastic properties, and the tensile layer 103 A tensile wire core 1032 is embedded in the outer groove of the corrugated tube wall, and the tensile wire core 1032 is a thin copper wire with a diameter of 0.5-1mm, which improves the fracture resistance of the corrosion-resistant tube body 1, as shown in Figure 3 , the PVC pipe base layer 101 is integrally formed with a first supplementary strip 1011 in the groove position of the corrugated pipe wall corresponding to the tensile layer 103, and the first supplementary strip 1011 is in close contact with the elastic core 1031 to ensure the internal structure of the corrosion-resistant pipe body 1 At the same time, the contact area between the PVC pipe base layer 101 and the tensile layer 103 is increased, and the phenomenon of degumming and cracking between the PVC pipe base layer 101 and the tensile layer 103 is not easy to occur.

A side compressive layer 104 is provided close to the outer wall of the tensile layer 103 , and a plurality of buffer air passages 1041 are arranged inside the side compressive layer 104 , and the multiple buffer air passages 1041 are arranged in an annular array along the axis of the corrosion-resistant pipe body 1 . A certain amount of air is stored in the buffer air channel 1041, so that the lateral pressure-resistant layer 104 has good buffering and anti-side pressure performance, as shown in FIG. 2, wherein the shape of the incision of the buffer air channel 1041 One or more combinations of the oval shape, the shape of the incision of the buffer airway 1041 adopts an arc shape, and the inner wall of the buffer airway 1041 is not easy to crack during the extrusion process of the side pressure-resistant layer 104, and has good elasticity The reset performance ensures the anti-buffering effect of the side pressure-resistant layer 104. The buffer air channel 1041 is preferably spirally wound along the side pressure-resistant layer 104. Compared with the traditional elongated hole and groove structure opened along the pipe axis, the buffer airway 1041 is spirally wound. The opened buffer air channel 1041 can be stressed by multiple buffer air channels 1041 at the same time when dealing with the extrusion force on one side of the corrosion-resistant pipe body 1, and has better anti-buffer performance. The inner wall of the side compression layer 104 A second supplementary strip 1042 is integrally formed at the position of the outer groove of the corrugated tube wall corresponding to the tensile layer 103, and the second supplementary strip 1042 is in close contact with the tensile core 1032, while improving the side compression layer 104 and the tensile layer. Due to the contact area of 103 , the phenomenon of debonding and cracking is not easy to occur between the side compression layer 104 and the tensile layer 103 .

An anti-corrosion layer 105 is provided on the outer wall of the close-contact side compression layer 104. The anti-corrosion layer 105 is composed of an elastic fiber woven mesh layer and polytetrafluoroethylene, and at least two or more elastic fiber woven mesh layers are impregnated in the polytetrafluoroethylene. The anti-corrosion layer 105 is formed by composite materials, which improves the corrosion resistance of the corrosion-resistant pipe body 1 .

A drying layer 106 is provided close to the outer wall of the anti-corrosion layer 105. The drying layer 106 is composed of an asbestos mesh layer and a synthetic resin emulsion. Drying layer 106, asbestos has high fire resistance, electrical insulation and thermal insulation, which can play a flame retardant role in the pipeline, and at the same time, it can insulate the water source in the pipeline, so as to avoid outdoor exposure and affect the water quality in the pipeline. Emulsion type moisture-proof and mildew-proof coating can effectively absorb moisture to achieve moisture-proof effect.

A wear-resistant outer layer 107 is provided close to the outer wall of the drying layer 106. The wear-resistant outer layer 107 is preferably a composite layer of quartz sand and rubber, which is compounded by mixing 10-18% quartz sand into the wear-resistant rubber. The particle size of the quartz sand is 100-200 mesh, which improves the rigidity and compressive strength of the outer surface of the corrosion-resistant pipe body 1, has good wear resistance and is not easy to wear.

Between the PVC pipe base layer 101 and the tensile layer 103, between the tensile layer 103 and the side compression layer 104, between the side compression layer 104 and the anti-corrosion layer 105, between the anti-corrosion layer 105 and the drying layer 106, between the drying layer 106 An ethylene copolymer adhesive layer is provided between the wear-resistant outer layer 107, and the ethylene copolymer adhesive layer is preferably an ethylene-vinyl acetate copolymerized adhesive layer, an ethylene-ethyl acrylate copolymerized adhesive layer, and an ethylene-acrylic acid copolymerized adhesive layer. Any of these layers, etc. The PVC pipe base layer 101 and the tensile layer 103 and between the tensile layer 103 and the side compression layer 104 are all bonded by ethylene-vinyl acetate copolymer, and the ethylene-vinyl acetate copolymer has viscosity, flexibility and heating properties. The fluidity of the material is good, between the side compression layer 104 and the anti-corrosion layer 105, and between the anti-corrosion layer 105 and the drying layer 106, ethylene-acrylic acid copolymer is used for bonding, and the ethylene-acrylic acid copolymer has good adhesion. Wide temperature range and good thermal stability, the drying layer 106 and the wear-resistant outer layer 107 are bonded by ethylene-acrylic acid copolymer, and the ethylene-acrylic acid copolymer has superior low temperature heat sealability and low temperature adhesion .

In the present invention, the tensile layer 103 is provided so that the nozzle of the corrosion-resistant pipe body 1 has good opening or condensation performance, and the nozzle can be prevented from tearing when the pipe is installed; performance; the anti-corrosion layer 105 is provided to improve the corrosion resistance of the corrosion-resistant pipe body 1; the drying layer 106 can play a flame retardant role in the pipeline, and at the same time, the water source in the pipeline can be insulated to avoid the influence of outdoor exposure. The water quality in the pipe can effectively absorb moisture to achieve the effect of moisture resistance; the rigidity and compressive strength of the outer surface of the corrosion-resistant pipe body 1 are improved, and the wear resistance is good and not easy to wear;

In the present invention, the outer wall of the PVC pipe base layer 101 is provided with a first supplementary strip 1011 which is matched with the groove in the corrugated pipe wall of the tensile layer 103, and the inner wall of the side compression layer 104 is provided with a corrugated pipe wall of the tensile layer 103. The second supplementary strip 1042 matched with the outer groove ensures that the internal structure of the corrosion-resistant pipe body 1 is tight, and at the same time increases its contact area, so that the phenomenon of degumming and cracking between layers is not easy to occur;

The incision shape of the buffer air channel 1041 adopts an arc shape. During the extrusion process of the side compression layer 104, the inner wall of the buffer air channel 1041 is not easy to crack, and has good elastic reset performance, ensuring the anti-buffering of the side compression layer 104. As a result, the buffer air passage 1041 is preferably spirally wound along the side pressure-resistant layer 104. Compared with the traditional elongated hole-groove structure opened along the pipe axis, the buffer air passage 1041 formed in the form of a helical coil is better in dealing with corrosion-resistant pipes. When the pressing force on one side of the main body 1 is pressed, the multiple buffer air passages 1041 can bear the force at the same time, which has better anti-buffer performance.

Of course, the present invention may also have other various embodiments. Based on the present embodiment, other embodiments obtained by those of ordinary skill in the art without any creative work, all fall within the protection scope of the present invention.

Claims (10)

1. A corrosion-resistant PVC pipe, comprising a corrosion-resistant pipe body (1), characterized in that the corrosion-resistant pipe body (1) comprises a PVC pipe base layer (101), and the inner wall of the PVC pipe base layer (101) is provided with There is an inner waterproof layer (102), the inner waterproof layer (102) is preferably an acrylic waterproof paint, and a tensile layer (103) is provided close to the outer wall of the PVC pipe base layer (101), and the outer wall of the inner waterproof layer (103) is close to The outer wall is provided with a side compressive layer (104), the outer wall close to the side compressive layer (104) is provided with an anti-corrosion layer (105), and the outer wall close to the anti-corrosion layer (105) is provided with a drying layer (106), which is close to the drying layer (106). The outer wall of the layer (106) is provided with a wear-resistant outer layer (107), the tube wall of the tensile layer (103) is an "S"-shaped curved corrugated tube wall, and the side compression layer (104) is inside Multiple buffer air passages (1041) are provided, and the multiple buffer air passages (1041) are arranged in an annular array along the axis of the corrosion-resistant pipe body (1). 2. The corrosion-resistant PVC pipe according to claim 1, characterized in that an elastic wire core (1031) is embedded in the inner groove of the corrugated pipe wall of the tensile layer (103), and the elastic wire core (1031) is preferably a polymer polymer core wire, and the oil-containing polymer polymer core wire is any one of nylon-66, nylon-6, polypropylene and the like. 3. A corrosion-resistant PVC pipe according to claim 1, characterized in that a tensile core (1032) is embedded in the outer groove of the corrugated pipe wall of the tensile layer (103), The wire core (1032) is a thin copper wire with a diameter of 0.5-1mm. 4. The corrosion-resistant PVC pipe according to claim 1, characterized in that, a first supplement is integrally formed at the position of the groove in the corrugated pipe wall of the PVC pipe base layer (101) corresponding to the tensile layer (103). The strip (1011), the first supplementary strip (1011) is in close contact with the elastic core (1031). The corrosion-resistant PVC pipe according to claim 1, characterized in that, the inner wall of the side compression layer (104) corresponding to the outer groove of the corrugated pipe wall of the tensile layer (103) is integrally formed with The second supplementary strip (1042) is in close contact with the tensile core (1032). 6 . The corrosion-resistant PVC pipe according to claim 1 , wherein the anti-corrosion layer ( 105 ) is composed of an elastic fiber braided mesh layer and polytetrafluoroethylene, and at least two or more layers of elastic fiber The woven mesh layer is impregnated with a polytetrafluoroethylene material to form an anti-corrosion layer (105). 7. The corrosion-resistant PVC pipe according to claim 1, wherein the drying layer (106) is composed of an asbestos mesh layer and a synthetic resin emulsion, and at least two or more asbestos mesh layers are impregnated in the asbestos mesh. The synthetic resin emulsion type moisture-proof and mildew-proof paint is compounded to form a drying layer (106). 8 . The corrosion-resistant PVC pipe according to claim 1 , wherein the wear-resistant outer layer ( 107 ) is preferably a quartz sand-rubber composite layer, and 10-18% quartz sand is mixed into the wear-resistant rubber. 9 . It is compounded, and the particle size of quartz sand is 100-200 mesh. 9. The corrosion-resistant PVC pipe according to claim 1, characterized in that, the shape of the incision of the buffer air channel (1041) is preferably one or a combination of two or more of circle, ellipse or oval , the buffer air channel (1041) is preferably opened along the side compression layer 104 in a spiral coil. The corrosion-resistant PVC pipe according to claim 1, characterized in that, between the PVC pipe base layer (101) and the tensile layer (103), the tensile layer (103) and the side compression layer ( 104), between the side compression layer (104) and the anti-corrosion layer (105), between the anti-corrosion layer (105) and the drying layer (106), between the drying layer (106) and the wear-resistant outer layer (107) All are provided with an ethylene copolymer adhesive layer, and the ethylene copolymer adhesive layer is preferably any one of an ethylene-vinyl acetate copolymerized adhesive layer, an ethylene-ethyl acrylate copolymerized adhesive layer, an ethylene-acrylic acid copolymerized adhesive layer, and the like.

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