Corrosion-resistant stainless steel pipe

Abstract

The utility model discloses a corrosion-resistant stainless steel pipe, which relates to the field of stainless steel pipes and comprises a stainless steel pipe body, a first flange is fixedly mounted on the right side of the stainless steel pipe body, and a second flange is fixedly mounted on the left side of the stainless steel pipe body. The stainless steel pipe body comprises an inner anti-corrosion layer, the outer wall of the inner anti-corrosion layer is wrapped with an inner pipe, the outer wall of the inner pipe is wrapped with a reinforcing layer, the outer wall of the reinforcing layer is wrapped with an outer pipe, and the outer wall of the outer pipe is wrapped with an outer anti-corrosion layer; a mounting pipe is arranged in the stainless steel pipe body in a sleeved mode and located on the inner wall of the inner anti-corrosion layer. According to the stainless steel pipe, the inner anti-corrosion layer, the reinforcing layer and the outer anti-corrosion layer are arranged, so that the stainless steel pipe has higher anti-corrosion performance and good anti-aging performance, the sealing ring, the sealing gasket and the sealing groove are arranged, the stainless steel pipe and a pipeline can be installed in a sealed mode, and the phenomenon that the stainless steel pipe is corroded due to dripping leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel pipes, in particular to a corrosion-resistant stainless steel pipe. Background Art

[0002] Stainless steel pipes are also called stainless steel seamless pipes or stainless steel welded pipes. They are widely used as conveying pipes and mechanical structural components in industries such as petroleum, chemical, medical, food, light industry, and mechanical instrumentation.

[0003] During use, existing stainless steel pipes are easily corroded because the ends formed after the stainless steel pipes are cut are not sprayed with corrosion-resistant materials, and the joints between the stainless steel pipes are also easily corroded.

[0004] In order to overcome the above-mentioned defects, the prior art (application number: 202120688256.1, Chinese patent with application date of 2021.04.02) discloses a corrosion-resistant stainless steel pipe, which can wrap the end of the steel pipe body by installing a pipe sleeve, an extension ring, an arc strip, a sealing ring, a fixing block and a bolt to reduce the corrosion damage caused by corrosive substances contacting the end of the steel pipe body. At the same time, two annular grooves are provided at both ends of the pipe sleeve, which can be used to connect the two steel pipe bodies and protect the connection between the two steel pipe bodies. By installing a sealing ring, the end face of the steel pipe body can be sealed to better protect the end of the steel pipe body and improve the quality of the steel pipe body. At the same time, it can also improve the connection strength between the pipe sleeve and the steel pipe body to improve the corrosion resistance of the steel pipe body.

[0005] Although the existing technology can solve the problem of corrosion resistance of stainless steel pipes, stainless steel pipes are usually installed in harsh working environments. Although they are corrosion-resistant, they may still be affected by corrosion and rust after long-term use, which makes the corrosion resistance of stainless steel pipes poor, thereby reducing the service life of stainless steel pipes.

[0006] Therefore, we proposed that corrosion-resistant stainless steel pipes can solve the above problems well. Utility Model Content

[0007] The purpose of the utility model is to provide a corrosion-resistant stainless steel pipe to solve the problem raised in the above background technology that a kind of corrosion-resistant stainless steel pipe currently on the market is usually installed in a harsh working environment. Although the stainless steel pipe itself has corrosion resistance, it may still be affected by corrosion and rust after long-term use, which makes the corrosion resistance of the stainless steel pipe poor, thereby reducing the service life of the stainless steel pipe.

[0008] To achieve the above object, the utility model provides the following technical solution: a corrosion-resistant stainless steel pipe, comprising a stainless steel pipe body, a first flange fixedly mounted on the right side of the stainless steel pipe body, and a second flange fixedly mounted on the left side of the stainless steel pipe body;

[0009] The stainless steel pipe body further comprises an inner anti-corrosion layer, an outer wall of the inner anti-corrosion layer is wrapped with an inner pipe, an outer wall of the inner pipe is wrapped with a reinforcement layer, an outer wall of the reinforcement layer is wrapped with an outer pipe, and an outer wall of the outer pipe is wrapped with an outer anti-corrosion layer;

[0010] A mounting pipe is sleeved inside the stainless steel pipe body, and the mounting pipe is located on the inner wall of the inner anti-corrosion layer. A sealing ring is fixedly connected to the right side of the mounting pipe.

[0011] As a preferred technical solution of the present application, a plurality of bolts are passed through the interior of the first flange, a sealing gasket is fixedly connected to the right side of the first flange, and a sealing groove is provided on the left side of the second flange.

[0012] As a preferred technical solution of the present application, the bolt and the first flange are connected in a detachable manner, and the diameters of the first flange and the second flange are set to be the same.

[0013] As a preferred technical solution of the present application, the sealing gasket and the sealing groove are matched, and the sealing gasket is made of rubber. The sealing gasket connected by the first flange is inserted into the corresponding sealing groove so that the first flange and the second flange are tightly fitted.

[0014] As the preferred technical solution of this application, the inner anti-corrosion layer is set as an epoxy resin layer, and the inner anti-corrosion layer is coated on the surface of the inner tube by thermal spraying epoxy powder to form a film. The thermal spraying epoxy powder is thermally sprayed on the surface of the inner tube through the inner anti-corrosion layer, thereby forming a strong, corrosion-resistant protective film, which effectively prevents the medium from corroding the inner wall of the stainless steel tube.

[0015] As the preferred technical solution of this application, the reinforcing layer is adhesively connected to the inner tube and the outer tube. The reinforcing layer is set as a glass fiber layer. The glass fiber layer has good corrosion resistance, which can further enhance the overall corrosion resistance of the stainless steel tube.

[0016] As the preferred technical solution of this application, the outer anti-corrosion layer is set to be a TPEP anti-corrosion layer, and the outer anti-corrosion layer adopts a hot melt winding process to form a multi-layer anti-corrosion layer on the surface of the outer pipe. By adopting a hot melt winding process for the outer anti-corrosion layer, a TPEP anti-corrosion layer composed of a bottom layer of epoxy resin, an intermediate layer of adhesive and an outer layer of polyethylene is formed on the surface of the outer pipe, which has higher anti-corrosion performance and good aging resistance.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The corrosion-resistant stainless steel pipe has an inner anti-corrosion layer, a reinforcement layer and an outer anti-corrosion layer, which can make the stainless steel pipe have higher corrosion resistance and good aging resistance. In addition, a sealing ring, a sealing gasket and a sealing groove are provided to seal the stainless steel pipe and the pipeline to avoid corrosion caused by dripping of the stainless steel pipe. The specific contents are shown below:

[0019] 1. An inner anti-corrosion layer is set up, through which thermal spray epoxy powder is thermally sprayed on the surface of the inner pipe, thereby forming a strong and corrosion-resistant protective film, which effectively prevents the medium from eroding the inner wall of the stainless steel pipe, thereby improving the corrosion resistance and service life of the stainless steel pipe;

[0020] Furthermore, a reinforcement layer is provided. The reinforcement layer is bonded between the inner tube and the outer tube using a glass fiber layer. The glass fiber layer has good corrosion resistance and can further enhance the overall corrosion resistance of the stainless steel tube.

[0021] Furthermore, an outer anti-corrosion layer is set. Through the thermal fusion winding process, a TPEP anti-corrosion layer composed of a bottom layer of epoxy resin, an intermediate layer of adhesive and an outer layer of polyethylene is formed on the surface of the outer pipe. It has higher anti-corrosion performance and good aging resistance, which can ensure that the stainless steel pipe will not corrode during long-term use.

[0022] 2. A sealing ring is set, and the installation pipe connected to the stainless steel pipe body is inserted into the pipe to be spliced, so that the sealing ring connected to the installation pipe fits against the inner wall of the pipe, thereby increasing the sealing of the stainless steel pipe splicing.

[0023] Furthermore, a sealing gasket and a sealing groove are provided, and the sealing gasket is inserted into the corresponding sealing groove through the first flange to make the first flange and the second flange fit tightly, further increasing the splicing sealing effect, and each bolt is manually passed through the first flange and the second flange to seal the stainless steel pipe and the pipeline to avoid corrosion caused by leakage of the stainless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the partial structure of the stainless steel pipe body of the utility model;

[0027] Figure 4 This is a schematic diagram of the splicing structure of the stainless steel pipe body of the utility model;

[0028] Figure 5This is a schematic diagram of the partial structure of the second flange of the utility model;

[0029] Figure 6 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0030] In the figure: 1. Stainless steel pipe body; 2. First flange; 3. Bolt; 4. Sealing gasket; 5. Second flange; 6. Sealing groove; 7. Mounting pipe; 8. Sealing ring; 9. Inner anti-corrosion layer; 10. Inner pipe; 11. Reinforcement layer; 12. Outer pipe; 13. Outer anti-corrosion layer. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figures 1-6 , the utility model provides the following technical solutions:

[0033] Example 1: In order to solve the problem that a kind of corrosion-resistant stainless steel pipe on the market is usually installed in a harsh working environment, although it has corrosion resistance, it may still be affected by corrosion and rust after long-term use, making the corrosion resistance of the stainless steel pipe poor, thereby reducing the service life of the stainless steel pipe. Figure 1 -Attached Figure 3 and attached Figure 6 The stainless steel pipe body 1 includes an inner anti-corrosion layer 9, the outer wall of which is wrapped with an inner pipe 10, the outer wall of which is wrapped with a reinforcement layer 11, the outer wall of which is wrapped with an outer pipe 12, and the outer wall of which is wrapped with an outer anti-corrosion layer 13; the inner anti-corrosion layer 9 is configured as an epoxy resin layer, and the inner anti-corrosion layer 9 is formed into a film on the surface of the inner pipe 10 using thermal spraying epoxy powder. The reinforcement layer 11 is bonded to the inner pipe 10 and the outer pipe 12, and the reinforcement layer 11 is configured as a glass fiber layer. The outer anti-corrosion layer 13 is configured as a TPEP anti-corrosion layer, and the outer anti-corrosion layer 13 is formed into a multi-layer anti-corrosion layer on the surface of the outer pipe 12 using a thermal fusion winding process.

[0034] The thermally sprayed epoxy powder is thermally sprayed on the surface of the inner tube 10 through the inner anti-corrosion layer 9, thereby forming a strong, corrosion-resistant protective film, which effectively prevents the medium from eroding the inner wall of the stainless steel tube, thereby improving the corrosion resistance and service life of the stainless steel tube. The reinforcing layer 11 adopts a glass fiber layer bonded between the inner tube 10 and the outer tube 12. The glass fiber layer has good corrosion resistance, which can further enhance the overall corrosion resistance of the stainless steel tube. At the same time, the outer anti-corrosion layer 13 adopts a hot-melt winding process to form a TPEP anti-corrosion layer composed of a bottom epoxy resin, an intermediate adhesive and an outer polyethylene on the surface of the outer tube 12. The TPEP anti-corrosion layer has higher corrosion resistance and good aging resistance, and can ensure that the stainless steel tube will not corrode during long-term use.

[0035] Example 2: The stainless steel pipe and pipeline can be sealed to avoid the corrosion caused by leakage of the stainless steel pipe. Figure 1 -Attached Figure 6 , comprising a stainless steel pipe body 1, a first flange 2 being fixedly mounted on the right side of the stainless steel pipe body 1, and a second flange 5 being fixedly mounted on the left side of the stainless steel pipe body 1; a mounting tube 7 being sleeved inside the stainless steel pipe body 1, and the mounting tube 7 being located on the inner wall of the inner anti-corrosion layer 9, and a sealing ring 8 being fixedly connected to the right side of the mounting tube 7. Several bolts 3 are passed through the interior of the first flange 2, a sealing gasket 4 is fixedly connected to the right side of the first flange 2, and a sealing groove 6 is provided on the left side of the second flange 5. The bolts 3 and the first flange 2 are connected for disassembly, and the diameters of the first flange 2 and the second flange 5 are set to be the same. The sealing gasket 4 and the sealing groove 6 are matched, and the sealing gasket 4 is set to be made of rubber.

[0036] When splicing through stainless steel pipes, the staff inserts the installation pipe 7 connected to the stainless steel pipe body 1 into the pipe to be spliced, so that the sealing ring 8 connected to the installation pipe 7 fits against the inner wall of the pipe, thereby increasing the sealing effect of the splicing. In the process of splicing the stainless steel pipe body 1 and the pipe, the first flange 2 connected to the stainless steel pipe body 1 fits against the second flange 5 connected to the pipe, so that the sealing gasket 4 connected to the first flange 2 is inserted into the corresponding sealing groove 6, so that the first flange 2 and the second flange 5 are tightly fitted, further increasing the splicing sealing effect, and then manually pass each bolt 3 through the first flange 2 and the second flange 5 to seal the stainless steel pipe and the pipe to avoid corrosion caused by leakage of the stainless steel pipe.

[0037] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A corrosion-resistant stainless steel pipe, comprising a stainless steel pipe body (1), a first flange (2) fixedly mounted on the right side of the stainless steel pipe body (1), and a second flange (5) fixedly mounted on the left side of the stainless steel pipe body (1); It is characterized in that Also includes: The stainless steel pipe body (1) comprises an inner anti-corrosion layer (9), the outer wall of the inner anti-corrosion layer (9) is wrapped with an inner pipe (10), the outer wall of the inner pipe (10) is wrapped with a reinforcement layer (11), the outer wall of the reinforcement layer (11) is wrapped with an outer pipe (12), and the outer wall of the outer pipe (12) is wrapped with an outer anti-corrosion layer (13); The interior of the stainless steel pipe body (1) is provided with a mounting pipe (7), and the mounting pipe (7) is located on the inner wall of the inner anti-corrosion layer (9), and a sealing ring (8) is fixedly connected to the right side of the mounting pipe (7).

2. The corrosion-resistant stainless steel pipe according to claim 1, characterized in that: A plurality of bolts (3) pass through the interior of the first flange (2), a sealing gasket (4) is fixedly connected to the right side of the first flange (2), and a sealing groove (6) is provided on the left side of the second flange (5).

3. The corrosion-resistant stainless steel pipe according to claim 2, characterized in that: The bolt (3) and the first flange (2) are connected in a disassembly manner, and the diameters of the first flange (2) and the second flange (5) are set to be the same.

4. The corrosion-resistant stainless steel pipe according to claim 2, characterized in that: The sealing gasket (4) and the sealing groove (6) are matched, and the sealing gasket (4) is made of rubber.

5. The corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The inner anti-corrosion layer (9) is configured as an epoxy resin layer, and the inner anti-corrosion layer (9) is formed by coating the surface of the inner tube (10) with epoxy powder by thermal spraying.

6. The corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The reinforcing layer (11) is bonded to the inner tube (10) and the outer tube (12), and the reinforcing layer (11) is configured as a glass fiber layer.

7. The corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The outer anti-corrosion layer (13) is configured as a TPEP anti-corrosion layer, and the outer anti-corrosion layer (13) adopts a thermal fusion winding process to form a multi-layer anti-corrosion layer on the surface of the outer tube (12).

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