Lining Teflon pipe fitting with good corrosion resistance

Abstract

The utility model relates to a lining Teflon pipe fitting with good corrosion resistance, which belongs to the technical field of pipe fittings and comprises a pipe body, a Teflon lining layer and a reinforced net rack, a connecting mechanism is arranged on the inner circumferential wall of the pipe body, the reinforced net rack is arranged on the outer side of the Teflon lining layer and located in the pipe body, and the Teflon lining layer is arranged on the outer side of the reinforced net rack. And sealing rings are slidably connected to the interiors of the top end and the bottom end of the pipe body. According to the lining Teflon pipe fitting with the good corrosion resistance, the pipe body selects high-quality carbon steel as a base material, the overall strength is ensured, the reinforcing net frame is formed by weaving high-strength fibers, the overall structural stability and the anti-pressure capacity of the pipe fitting are improved, and the pipe fitting can serve for a long time in a severe environment without losing efficacy; compared with a protection mode purely relying on special alloy or a coating, the product is lower in cost, easy to popularize and apply on a large scale, higher in tensile strength and elastic modulus and wider in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fittings, in particular to a Teflon lined pipe fitting with good corrosion resistance. Background Art

[0002] A conveying pipeline refers to a pipeline specifically used to transport liquid and gaseous materials. The method of transporting materials through pipelines is called pipeline transportation. It is mainly suitable for application scenarios in industries such as chemical, petroleum, and pharmaceuticals where highly corrosive media are transported.

[0003] At present, in the chemical, petroleum and other industries, since the conveying media are often highly corrosive, traditional metal pipes are easily corroded, resulting in a short service life and increased maintenance costs for enterprises. In order to extend the service life of pipe fittings, a variety of anti-corrosion treatment technologies and new materials have appeared on the market, such as surface coatings and composite pipes. Although these technologies can alleviate the corrosion problem to a certain extent, they still cannot meet the needs under certain extreme conditions.

[0004] Existing anti-corrosion measures mainly include coating the inside of metal pipes with anti-corrosion paint or using high-corrosion-resistant alloy materials such as stainless steel and nickel-based alloys to make pipe bodies. Among them, although the coating method can effectively isolate the corrosive medium, its protective effect is unstable due to the problem of easy peeling of the coating, and the use of high-corrosion-resistant alloy materials faces the problem of high cost. In addition, there is also a method of improving the corrosion resistance of ordinary carbon steel pipe fittings through sacrificial anode protection, but this also has problems such as uneven protection and complex maintenance. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a Teflon-lined pipe fitting with good corrosion resistance. It has the advantages of good corrosion resistance and high economic benefits, and solves the problems of poor corrosion resistance, low reliability and poor economy of the anti-corrosion pipe fittings currently on the market.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a Teflon-lined pipe fitting with good corrosion resistance, comprising a pipe body, a Teflon lining layer and a reinforcement grid, a connecting mechanism being provided on the inner peripheral wall of the pipe body, the reinforcement grid being provided on the outer side of the Teflon lining layer, the reinforcement grid being located inside the pipe body, the interiors of the top and bottom ends of the pipe body being slidably connected with sealing rings, the interiors of the top and bottom ends of the pipe body being threadedly connected with fixing cylinders, the opposite sides of the sealing rings on the upper and lower sides being fitted with the opposite sides of the upper and lower fixing cylinders, the opposite sides of the fixing cylinders on the upper and lower sides being provided with flanges, the opposite sides of the flanges on the upper and lower sides being fitted with the top and bottom ends of the pipe body;

[0007] The connecting mechanism includes a bottom layer, a wear-resistant layer and an anti-corrosion layer. The bottom layer is arranged on the inner circumferential wall of the pipe body, the wear-resistant layer is arranged on the inner circumferential wall of the bottom layer, the anti-corrosion layer is arranged on the inner circumferential wall of the wear-resistant layer, and the reinforced grid is arranged on the inner circumferential wall of the anti-corrosion layer.

[0008] By adopting this technical solution, the pipe fittings have good corrosion resistance and high economic benefits.

[0009] Furthermore, the tube body is a carbon steel tube, and the bottom layer is an epoxy resin layer.

[0010] By adopting this technical solution, the adhesion inside the tube body can be improved through the bottom layer.

[0011] Furthermore, the wear-resistant layer is a ceramic powder layer, and the corrosion-resistant layer is a polytetrafluoroethylene layer.

[0012] By adopting this technical solution, the wear resistance of the interior of the pipe body can be improved through the wear-resistant layer.

[0013] Furthermore, the inner diameter of the anti-corrosion layer matches the outer diameter of the reinforced grid.

[0014] By adopting this technical solution, the corrosion resistance inside the pipe body can be improved through the anti-corrosion layer.

[0015] Furthermore, the sealing ring is a silicone rubber ring, and the sealing ring matches the gap of the tube body.

[0016] By adopting this technical solution, the sealing performance of the connection between the tube body and the fixed cylinder is improved.

[0017] Furthermore, the fixing cylinder is communicated with the flange.

[0018] By adopting this technical solution, the fluid inside the pipe body can flow through the fixed cylinder and the flange.

[0019] Furthermore, the Teflon lining layer is adapted to the gaps in the reinforced grid.

[0020] By adopting this technical solution, the Teflon lining layer can be tightly arranged inside the reinforced grid to improve the stability of the structure.

[0021] Furthermore, an anti-oxidation layer is provided on the outer side of the tube body.

[0022] By adopting this technical solution, the anti-oxidation performance of the outer side of the pipe body can be improved through the anti-oxidation layer, thereby increasing the service life.

[0023] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0024] The corrosion-resistant Teflon lined pipe fittings have high-quality carbon steel as the base material for the pipe body to ensure overall strength. The reinforced grid is woven from high-strength fibers to improve the overall structural stability and pressure resistance of the pipe fittings. The sealing ring is made of silicone rubber, and its size matches the pipe body to improve the sealing performance of the connection. When corrosive fluids pass through the pipe fittings, the first thing they come into contact with is the Teflon lining layer. The Teflon lining layer has excellent acid and alkali resistance and antioxidant properties, which can effectively prevent corrosive substances from penetrating into the pipe body. Even local damage will not spread rapidly because the built-in reinforced grid can provide additional support to prevent cracks from further expanding. In addition, good The excellent sealing performance can also avoid the adverse effects of external environmental factors. By arranging a base layer on the inner circumference of the pipe body, the adhesion of the pipe body is enhanced. By arranging a wear-resistant layer on the inner circumference of the base layer, the wear resistance of the pipe body is improved. By arranging an anti-corrosion layer on the inner circumference of the wear-resistant layer, the best anti-corrosion performance of the pipe body can be achieved, which significantly improves the resistance of the pipe fittings to various corrosive media and can serve for a long time in harsh environments without failure. Compared with relying solely on special alloys or coating protection, this product is cheaper and easier to promote and apply on a large scale. It has higher tensile strength and elastic modulus, which makes it more applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the connection structure between the fixed cylinder and the pipe body of the utility model;

[0027] Figure 3 This is a schematic diagram of the connection mechanism of the utility model.

[0028] In the figure: 1. pipe body; 2. Teflon lining layer; 3. reinforced grid; 4. connecting mechanism; 41. bottom layer; 42. wear-resistant layer; 43. anti-corrosion layer; 5. sealing ring; 6. fixing cylinder; 7. flange; 8. anti-oxidation layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 2In this embodiment, a Teflon lined pipe fitting with good corrosion resistance includes a pipe body 1, a Teflon lining layer 2 and a reinforced grid 3. A connecting mechanism 4 is provided on the inner circumferential wall of the pipe body 1, and the connecting mechanism 4 improves the best corrosion resistance of the pipe body 1. The reinforced grid 3 is arranged on the outside of the Teflon lining layer 2, and the reinforced grid 3 is located inside the pipe body 1. The top and bottom ends of the pipe body 1 are both slidably connected with sealing rings 5. The top and bottom ends of the pipe body 1 are both threadedly connected to the fixing tube 6. The opposite sides of the upper and lower sealing rings 5 are both fitted with the opposite sides of the upper and lower fixing tubes 6. The opposite sides of the upper and lower fixing tubes 6 are both provided with flanges 7. The opposite sides of the upper and lower flanges 7 are both fitted with the top and bottom ends of the pipe body 1.

[0031] In this embodiment, the sealing ring 5 is a silicone rubber ring, which matches the gap between the sealing ring 5 and the tube body 1, the fixing tube 6 is connected to the flange 7, the Teflon lining layer 2 is adapted to the gap between the reinforcing grid 3, and the outside of the tube body 1 is provided with an anti-oxidation layer 8, which is an organic silicone coating. This coating can form a protective layer on the outer surface of the tube body 1, which has a significant protective effect of reducing the oxidation behavior of the tube body 1 at high temperature and can slow down the oxidation process of the tube body 1.

[0032] In this embodiment, thread grooves are provided inside the top and bottom ends of the tube body 1, and threads are provided on the outer sides of the upper and lower fixing cylinders 6. By twisting the upper and lower side flanges 7, the upper and lower side fixing cylinders 6 are driven to rotate inside the top and bottom ends of the tube body 1, and then can be fixed inside the top and bottom ends of the body 1. The opposite sides of the upper and lower sealing rings 5 are both in contact with the top and bottom ends of the Teflon lining layer 2 to form a seal.

[0033] It should be noted that the pipe body 1 uses high-quality carbon steel as the base material to ensure the overall strength. The reinforced grid 3 is woven from high-strength fibers, which improves the overall structural stability and pressure resistance of the pipe. The sealing ring 5 is silicone rubber, and its size matches the pipe body 1 to improve the sealing performance of the connection. When the corrosive fluid passes through the pipe, the first thing it comes into contact with is the Teflon lining layer 2. The Teflon lining layer 2 has excellent acid and alkali resistance and antioxidant properties, and can effectively prevent corrosive substances from penetrating into the pipe body 1. Even local damage will not spread rapidly because the built-in reinforced grid 3 can provide additional support to prevent the cracks from further expanding. In addition, good sealing performance can also avoid the adverse effects of external environmental factors.

[0034] See also Figure 3 In order to improve the best anti-corrosion performance of the pipe body 1, in this embodiment, the connecting mechanism 4 includes a bottom layer 41, a wear-resistant layer 42 and an anti-corrosion layer 43. The bottom layer 41 is arranged on the inner circumferential wall of the pipe body 1, the wear-resistant layer 42 is arranged on the inner circumferential wall of the bottom layer 41, the anti-corrosion layer 43 is arranged on the inner circumferential wall of the wear-resistant layer 42, and the reinforced grid 3 is arranged on the inner circumferential wall of the anti-corrosion layer 43.

[0035] In this embodiment, by setting a bottom layer 41 on the inner circumferential wall of the tube body 1, the adhesion of the tube body 1 is enhanced, by setting a wear-resistant layer 42 on the inner circumferential wall of the bottom layer 41, the wear resistance of the tube body 1 is improved, and by setting an anti-corrosion layer 43 on the inner circumferential wall of the wear-resistant layer 42, the best anti-corrosion performance of the tube body 1 can be achieved.

[0036] In this embodiment, the pipe body 1 is a carbon steel pipe, the bottom layer 41 is an epoxy resin layer, the wear-resistant layer 42 is a ceramic powder layer, and the anti-corrosion layer 43 is a polytetrafluoroethylene layer. The inner diameter of the anti-corrosion layer 43 matches the outer diameter of the reinforced grid 3.

[0037] In this embodiment, the Teflon lining layer 2 can be made of different brands of PTFE or other brands of the same quality according to actual working conditions, and the reinforcing grid 3 can also be replaced with aramid silk cloth of the same grade or other polymer reinforcing materials.

[0038] In this embodiment, the lined Teflon pipe fitting adopts a special three-layer structural design. The outer layer is an ordinary carbon steel pipe shell, which provides the necessary rigidity support; in the middle is a layer of ultra-thin but extremely strong reinforcement grid 3, which not only greatly improves the ability to resist external physical impact, but also acts as a good adhesive to tightly combine the inner and outer layers. The most critical core is the inner Teflon lining layer 2. The Teflon lining layer 2 is polytetrafluoroethylene (commonly known as "Teflon"), which is known for its excellent resistance to chemical corrosion. After precision processing, it can be seamlessly fitted to the entire channel surface to form a long-term and effective barrier. The entire production process is very rigorous. First, the pipe body 1 is pretreated to remove oil, dirt and rust. Then, a special glue is mixed and prepared in a predetermined proportion and applied to the area to be coated. Then, the reinforcement grid 3 and the Teflon lining layer 2 are arranged inside the pipe body 1.

[0039] In this embodiment, the Teflon lining layer 2 is made of imported PTFE material, model PT-600.

[0040] It should be noted that the pipe fittings have significantly improved resistance to various corrosive media and can serve for a long time in harsh environments without failure. Compared with relying solely on special alloys or coating protection, this product is cheaper and easier to promote and apply on a large scale. The unique three-layer structure gives the pipe fittings excellent mechanical properties, such as higher tensile strength and elastic modulus, making it more applicable.

[0041] The working principle of the above embodiment is:

[0042] The pipe body 1 uses high-quality carbon steel as the base material to ensure the overall strength. The reinforced grid 3 is woven from high-strength fibers to improve the overall structural stability and pressure resistance of the pipe. The sealing ring 5 is made of silicone rubber, and its size matches the pipe body 1 to improve the sealing performance of the connection. When the corrosive fluid passes through the pipe, it first comes into contact with the Teflon lining layer 2. The Teflon lining layer 2 has excellent acid and alkali resistance and antioxidant properties, which can effectively prevent corrosive substances from penetrating into the pipe body 1. Even local damage will not spread rapidly because the built-in reinforced grid 3 can provide additional support to prevent cracks from further expanding. In addition, good sealing performance can also avoid adverse effects on it from external environmental factors. By arranging a bottom layer 41 on the inner circumferential wall of the pipe body 1, the adhesion of the pipe body 1 is enhanced; by arranging a wear-resistant layer 42 on the inner circumferential wall of the bottom layer 41, the wear resistance of the pipe body 1 is improved; by arranging an anti-corrosion layer 43 on the inner circumferential wall of the wear-resistant layer 42, the best anti-corrosion performance of the pipe body 1 can be achieved, which significantly improves the resistance of the pipe fitting to various corrosive media and can serve for a long time in harsh environments without failure. Compared with the method of relying solely on special alloys or coating protection, the cost of this product is lower and it is easy to promote and apply on a large scale. The unique three-layer structure gives the pipe fitting excellent mechanical properties, such as higher tensile strength and elastic modulus, which makes it more applicable.

Claims

1. A Teflon-lined pipe fitting with good corrosion resistance, comprising a pipe body (1), a Teflon lining layer (2) and a reinforced grid (3), characterized in that: The inner peripheral wall of the tube body (1) is provided with a connecting mechanism (4), the reinforcing grid (3) is arranged on the outside of the Teflon lining layer (2), and the reinforcing grid (3) is located inside the tube body (1). The top and bottom ends of the tube body (1) are both slidably connected to the inside with a sealing ring (5), and the top and bottom ends of the tube body (1) are both threadedly connected to the inside with a fixing cylinder (6), and the opposite sides of the sealing ring (5) on the upper and lower sides are both fitted with the opposite sides of the upper and lower fixing cylinders (6), and the opposite sides of the upper and lower fixing cylinders (6) are both provided with flanges (7), and the opposite sides of the upper and lower flanges (7) are both fitted with the top and bottom ends of the tube body (1); The connecting mechanism (4) comprises a bottom layer (41), a wear-resistant layer (42) and an anti-corrosion layer (43); the bottom layer (41) is arranged on the inner peripheral wall of the tube body (1); the wear-resistant layer (42) is arranged on the inner peripheral wall of the bottom layer (41); the anti-corrosion layer (43) is arranged on the inner peripheral wall of the wear-resistant layer (42); and the reinforcing grid (3) is arranged on the inner peripheral wall of the anti-corrosion layer (43).

2. A Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The tube body (1) is a carbon steel tube, and the bottom layer (41) is an epoxy resin layer.

3. The Teflon-lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The wear-resistant layer (42) is a ceramic powder layer, and the corrosion-resistant layer (43) is a polytetrafluoroethylene layer.

4. The Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The inner diameter of the anti-corrosion layer (43) matches the outer diameter of the reinforced grid (3).

5. The Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The sealing ring (5) is a silicone rubber ring, and the sealing ring (5) matches the gap between the tube body (1).

6. The Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The fixed cylinder (6) is in communication with the flange (7).

7. The Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: The Teflon lining layer (2) is adapted to the gap between the reinforcement grid (3).

8. The Teflon lined pipe fitting with good corrosion resistance according to claim 1, characterized in that: An anti-oxidation layer (8) is provided on the outer side of the tube body (1).

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