Corrosion-resistant nodular cast iron pipe fitting lining structure

Abstract

The utility model belongs to the technical field of conveying pipes, and particularly relates to a corrosion-resistant nodular cast iron pipe fitting lining structure which comprises a pipeline body and is characterized in that a buffer layer, a transition layer, a corrosion-resistant layer and a wear-resistant layer are sequentially arranged on the inner side of the pipeline body from outside to inside; the buffer layer is a rubber layer and is adhered to the inner wall of the pipeline body; the transition layer is an organic silicon resin layer, and the transition layer is coated on the inner side surface of the buffer layer; the corrosion-resistant layer is made of glass flake resin, and the inner side surface of the transition layer is coated with the corrosion-resistant layer; the wear-resistant layer is an ultra-high molecular weight polyethylene coating, and the wear-resistant layer is coated on the inner side surface of the corrosion-resistant layer. The buffer layer is a rubber layer, has excellent flexibility and buffer performance, and can effectively absorb stress generated by medium flow impact and temperature change, reduce damage to the lining structure and enhance the combination stability of the lining and the pipe body, so that the service life of the pipeline body is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of conveying pipeline, concretely relates to a kind of corrosion-resistant nodular cast iron pipe fittings lining structure. BACKGROUND

[0002] Nodular cast iron pipeline is widely applied in water supply, drainage, gas transmission and other fields due to its good mechanical properties, corrosion resistance and construction convenience. However, with the increase of use time and the erosion of conveying medium, corrosion and other problems are prone to occur on the inner wall of the pipeline, which not only reduces the water conveying capacity of the pipeline and increases the energy consumption of fluid conveying, but also causes pipeline leakage in severe cases, affecting the normal operation of the entire pipe network system. Therefore, in order to prolong the service life of nodular cast iron pipeline, lining is provided on the inner side of the pipeline to increase the corrosion resistance and erosion resistance of the pipeline.

[0003] However, the existing lining structure of nodular cast iron pipeline does not have buffering capacity for stress generated by medium flow impact and temperature change, and is easily damaged. At the same time, the overall structural strength of the wear-resistant layer is insufficient, and it is prone to breakage under the impact of medium flow. SUMMARY

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a corrosion-resistant nodular cast iron pipe fitting lining structure, which can realize excellent flexibility and buffering performance of the nodular cast iron pipeline lining structure, effectively absorb the stress generated by medium flow impact and temperature change, reduce the damage to the lining structure, and enhance the combination stability of the lining and the pipe body. At the same time, the wear-resistant layer has better overall structural strength.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A corrosion-resistant nodular cast iron pipe fitting lining structure, comprising a pipeline body, a buffer layer, a transition layer, a corrosion-resistant layer and a wear-resistant layer are sequentially provided on the inner side of the pipeline body from the outside to the inside.

[0007] The buffer layer is a rubber layer, and the buffer layer is adhered to the inner wall of the pipeline body.

[0008] The transition layer is an organic silicone resin layer, and the transition layer is coated on the inner side surface of the buffer layer.

[0009] The corrosion-resistant layer is glass flake resin, and the corrosion-resistant layer is coated on the inner side surface of the transition layer.

[0010] The wear-resistant layer is an ultrahigh molecular weight polyethylene coating, and the wear-resistant layer is coated on the inner side surface of the corrosion-resistant layer.

[0011] Further, a stainless steel wire layer is provided on the inner side of the wear-resistant layer, and the stainless steel wire is arranged in a mesh shape.

[0012] Further, the buffer layer and the transition layer are provided with a nano-silver antibacterial agent coating.

[0013] The buffer layer is a rubber foamed product.

[0014] Further, the thickness of the buffer layer is 2mm, and the buffer layer is a sheet and is laid on the inner side of the pipeline body.

[0015] Further, the inner side wall of the pipeline body is coated with an adhesive layer for sticking the buffer layer;

[0016] The adhesive layer is selected from epoxy resin AB glue.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The buffer layer is a rubber layer, which has excellent flexibility and buffering performance, can effectively absorb the stress generated by the flow impact of the medium and temperature change, reduces the damage to the inner lining structure, enhances the combination stability of the inner lining and the pipe body, and greatly prolongs the service life of the pipeline body.

[0019] 2. The inner side of the wear-resistant layer is provided with a stainless steel wire layer, which can strengthen the wear-resistant layer, can pull each region of the wear-resistant layer, avoid the cracking of the wear-resistant layer, and better ensure the stability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a sectional view of the pipeline body of the utility model;

[0021] Figure 2 It is a wear-resistant layer structure schematic view of the utility model;

[0022] Figure 3 It is a nano-silver antibacterial agent coating schematic view of the utility model;

[0023] Figure 4 It is an adhesive layer schematic view of the utility model.

[0024] In the drawings, the components represented by each reference numeral are listed as follows:

[0025] 1. Pipeline body; 2. Buffer layer; 3. Transition layer; 4. Corrosion-resistant layer; 5. Wear-resistant layer; 51. Stainless steel wire layer; 6. Nano-silver antibacterial agent coating; 7. Adhesive layer. DETAILED DESCRIPTION

[0026] In order to make the purpose and advantages of the utility model more clearly, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model and does not strictly limit the protection scope of the utility model specifically requested.

[0027] As shown in Figure 1 A kind of corrosion-resistant ductile cast iron pipe fittings lining structure, including pipeline body 1, the lining of buffer layer 2, transition layer 3, corrosion-resistant layer 4 and wear-resistant layer 5 sequentially arranged from outside to inside in the inside of pipeline body 1, the lining has better buffering capacity, and has the properties of corrosion resistance and wear resistance, so as to better prolong the service life of pipeline body 1;

[0028] Buffer layer 2 is rubber layer, and buffer layer 2 is adhered to the inner wall of pipeline body 1, and the rubber elastomer has excellent flexibility and buffering performance, can effectively absorb the stress generated by medium flow impact and temperature change, reduce the damage to the lining structure, enhance the combination stability of lining and pipe body, thereby greatly prolonging the service life of pipeline body 1;

[0029] Transition layer 3 is silicone resin layer, and transition layer 3 is coated on the inner side surface of buffer layer 2, and the silicone resin enhances the flexibility and water resistance of the coating, providing a good foundation for the adhesion of corrosion-resistant layer 4;

[0030] Corrosion-resistant layer 4 is glass flake resin, and corrosion-resistant layer 4 is coated on the inner side surface of transition layer 3, and the glass flake in the glass flake resin is arranged in a laminated staggered manner, forming a labyrinth type anti-permeation structure, which has strong barrier ability to various corrosive media, greatly improving the corrosion resistance of the pipeline;

[0031] Wear-resistant layer 5 is an ultrahigh molecular weight polyethylene coating, and wear-resistant layer 5 is coated on the inner side surface of corrosion-resistant layer 4, and wear-resistant layer 5 is coated on the inner side surface of corrosion-resistant layer 4 by fluidized bed coating method, which has good wear resistance and can better resist the erosion of medium flow.

[0032] As shown in Figure 2 The inner side of wear-resistant layer 5 is provided with a stainless steel wire layer 51, which can strengthen wear-resistant layer 5 and pull each area of wear-resistant layer 5, avoiding the rupture of wear-resistant layer 5 and better ensuring the stability of the structure.

[0033] The stainless steel wire is arranged in a mesh shape, and the mesh-shaped stainless steel wire layer 51 has better integrity, thereby ensuring the stable support of wear-resistant layer 5.

[0034] As shown in Figure 3As shown, the buffer layer 2 and the transition layer 3 are provided with a nano-silver antibacterial coating 6, which can effectively inhibit the growth of microorganisms in the pipeline to ensure water quality safety.

[0035] The buffer layer 2 is a rubber foaming product, which has a large number of bubble holes inside, can effectively ensure that the buffer layer has good elastic shrinkage capacity, thereby greatly improving the buffering capacity of the buffer layer 2.

[0036] The thickness of the buffer layer 2 is 2mm, and the 2mm-thick buffer layer 2 can retain a certain elastic buffering allowance without occupying space.

[0037] The buffer layer 2 is a sheet material and is laid on the inner side of the pipeline body 1, which is more convenient for laying in the pipeline body 1, and can better adhere to the inner surface of the pipeline body 1.

[0038] As shown in the drawings, Figure 4 The inner side wall of the pipeline body 1 is coated with an adhesive layer 7 for adhering the buffer layer 2, and the pipeline body 1 is adhered and fixed to the buffer layer 2 by the adhesive layer 7, thereby completing the laying and fixing of the buffer layer 2 in the pipeline body 1.

[0039] The adhesive layer 7 is made of epoxy resin AB glue, which has good adhesion and can provide long-term durability and reliability.

[0040] The working principle of the utility model is as follows: the inner lining structure of the pipeline body 1 is set, the epoxy resin AB glue is evenly applied to the inner side of the pipeline body 1, then the sheet rubber of the buffer layer 2 is laid in the inner side of the pipeline body 1, and the sheet rubber is formed into a tubular shape and adheres to the inner side wall of the pipeline body 1.

[0041] Then, the nano-silver antibacterial coating 6 is sprayed, and then the silicone resin layer of the transition layer 3 is coated on the inner side of the nano-silver antibacterial coating 6.

[0042] The glass flake resin is poured into the storage tank of the high-pressure airless spraying equipment, the spraying pressure and the movement speed of the spray gun are adjusted, and the glass flake resin is uniformly sprayed on the inner surface of the transition layer 3.

[0043] The wear-resistant layer 5 is coated on the inner side surface of the corrosion-resistant layer 4 by fluidized bed coating method, the mesh stainless steel wire layer 51 is laid on the inner surface of the wear-resistant layer 5, and finally the wear-resistant layer 5 is coated until the wear-resistant layer 5 completely covers the mesh stainless steel wire layer 51, thereby completing the setting of the inner lining structure in the pipeline body 1.

[0044] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application. Structures, devices and operation methods not specifically described and explained in the present application are implemented according to conventional means in the art, unless otherwise specified and limited.

Claims

1. A corrosion-resistant ductile iron pipe fitting lining structure, comprising a pipe body (1), characterized in that: The inner side of the pipe body (1) is provided with a buffer layer (2), a transition layer (3), a corrosion-resistant layer (4) and a wear-resistant layer (5) from the outside to the inside. The buffer layer (2) is a rubber layer and is adhered to the inner wall of the pipe body (1); The transition layer (3) is an organosilicon resin layer, and the transition layer (3) is coated on the inner surface of the buffer layer (2); The corrosion-resistant layer (4) is glass flake resin, and the corrosion-resistant layer (4) is coated on the inner surface of the transition layer (3); The wear-resistant layer (5) is an ultra-high molecular weight polyethylene coating, and the wear-resistant layer (5) is coated on the inner surface of the corrosion-resistant layer (4).

2. The corrosion-resistant ductile iron pipe fitting lining structure according to claim 1, characterized in that: The wear-resistant layer (5) has a stainless steel wire layer (51) on its inner side, and the stainless steel wire is arranged in a mesh.

3. The corrosion-resistant ductile iron pipe fitting lining structure according to claim 1, characterized in that: A nano-silver antibacterial agent coating (6) is provided between the buffer layer (2) and the transition layer (3). The buffer layer (2) is a rubber foam product.

4. The corrosion-resistant ductile iron pipe fitting lining structure according to claim 3, characterized in that: The thickness of the buffer layer (2) is 2mm, and the buffer layer (2) is a sheet material laid on the inner side of the pipe body (1).

5. The corrosion-resistant ductile iron pipe fitting lining structure according to claim 1, characterized in that: The inner wall of the pipe body (1) is coated with an adhesive layer (7) for adhering the buffer layer (2). The adhesive layer (7) is made of epoxy resin AB glue.

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