A stainless steel pipe resistant to intergranular corrosion

Abstract

The utility model relates to the technical field of stainless steel pipes resistant to intergranular corrosion, and in particular to a stainless steel pipe resistant to intergranular corrosion, comprising a stainless steel pipe, a pressing plate and a fastening shell, wherein a galvanized layer is arranged inside the stainless steel pipe, an anti-corrosion layer is coated on the outside of the stainless steel pipe, a silicone ring is arranged on the outside of the anti-corrosion layer, a rubber layer is fixedly connected to the outside of the silicone ring, a bellows is arranged on the outside of the rubber layer, a foam layer is filled inside the bellows, a threaded block is fixedly connected to the outside of the stainless steel pipe, a ball head is fixedly connected to one end of the stainless steel pipe, and a sealing gasket is fixedly connected to the outside of the ball head. In the utility model, the inner and outer parts of the stainless steel pipe can be protected from corrosion by the galvanized layer and the anti-corrosion layer, and the thickness of the galvanized layer is relatively thick. When transporting chemical liquid raw materials, it can not only prevent the raw materials from corroding the stainless steel pipe, but also play a wear-resistant effect, protect the pipeline, and reduce the wear on the pipeline.

Description

Technical Field

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

[0002] Intergranular corrosion-resistant stainless steel pipe is a stainless steel pipe that has been specially treated. No corrosion will occur between the grains of the stainless steel pipe. The stainless steel pipe has the characteristics of corrosion resistance, high temperature resistance and pressure resistance. It is widely used in industry, construction, chemical industry, medical and other fields. Stainless steel pipes are usually made of stainless steel plates by coiling or cold drawing. Because stainless steel pipes contain chromium, a dense oxide film will be formed on the outside of the steel pipe, which can effectively prevent oxidation and corrosion. In addition, stainless steel pipes also have excellent mechanical properties, high strength, good toughness and wear resistance. The surface of the stainless steel pipe is smooth and flat, the material is pollution-free and will not release harmful substances. It can be used in medical and other industries.

[0003] In the chemical industry, stainless steel pipes resistant to intergranular corrosion are generally used as liquid conveying pipelines to transport raw materials. Since chemical raw materials are corrosive to a certain extent, and the rapid flow of liquid in the pipeline will wear the inner wall of the pipeline, secondly, stainless steel pipes are susceptible to external impacts when transporting liquids. The pipe wall of stainless steel pipes is thin, which is prone to dents and even pipeline ruptures. Finally, there is a lack of corrosion-resistant protection measures for connectors between pipeline connection parts, and the connectors are extremely susceptible to corrosion by the transported raw materials. Therefore, a stainless steel pipe resistant to intergranular corrosion is proposed to address the above problems. Summary of the invention

[0004] The utility model aims to provide a stainless steel pipe resistant to intergranular corrosion, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A stainless steel pipe resistant to intergranular corrosion comprises a stainless steel pipe, a pressure plate and a fastening shell, wherein a galvanized layer is provided inside the stainless steel pipe, an anti-corrosion layer is coated on the outside of the stainless steel pipe, a silicone ring is provided on the outside of the anti-corrosion layer, a rubber layer is fixedly connected to the outside of the silicone ring, a bellows is provided on the outside of the rubber layer, a foam layer is filled inside the bellows, a threaded block is fixedly connected to the outside of the stainless steel pipe, a ball head is fixedly connected to one end of the stainless steel pipe, a sealing gasket is fixedly connected to the outside of the ball head, a disc is fixedly connected to the end of the stainless steel pipe away from the ball head, a joint is fixedly connected to the side of the disc away from the stainless steel pipe, a rubber pad is provided on one side of the disc, a pressure plate is provided on the outside of the stainless steel pipe, and a fastening shell is rotatably connected to the outside of the stainless steel pipe.

[0007] Preferably, the number of the silicone rings is several, and the distance between two adjacent silicone rings is equal.

[0008] Preferably, the diameter of the ball head is smaller than the diameter of the joint, and the diameter of the disc is larger than the diameter of the joint.

[0009] Preferably, the threaded block and the fastening shell are in a threaded connection relationship.

[0010] Preferably, there are two rubber pads on one stainless steel tube, which are respectively arranged on both sides of the pressing plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the inner and outer parts of the stainless steel pipe can be protected from corrosion by the galvanized layer and the anti-corrosion layer, and the thickness of the galvanized layer is relatively thick. When transporting chemical liquid raw materials, it can not only prevent the raw materials from corroding the stainless steel pipe, but also play a wear-resistant effect, protect the pipeline, and reduce the wear on the pipeline;

[0013] 2. In the utility model, the silicone ring, rubber layer, bellows and foam layer are provided to protect the outside of the stainless steel pipe and increase the buffering measures. The bellows, foam layer, rubber layer and silicone ring are all made of flexible materials, which can offset part of the external impact, protect the pipeline, and prevent the pipeline from being dented or broken after the impact.

[0014] 3. In the utility model, the connection parts of the pipeline can be protected against corrosion by means of the threaded block, ball head, sealing pad, disc, joint, rubber pad, pressure plate and fastening shell. The ball head of the pipeline is connected to the joint of another pipeline, and the fastening shell and the threaded block are threadedly connected. During the connection process, the fastening shell compresses the rubber pad, pressure plate and disc, so as to seal the fastening shell and the stainless steel pipe. The tighter the connection between the fastening shell and the threaded block, the better the sealing between the pipeline connection, and the transported raw materials are not easy to leak out and corrode the connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at A;

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at B;

[0018] Figure 4 This is a schematic diagram of the structure of the pressing plate of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the stainless steel pipe of the utility model;

[0020] Figure 6 It is a half-section schematic diagram of the stainless steel pipe structure of the utility model.

[0021] In the figure: 1. stainless steel pipe; 2. galvanized layer; 3. anti-corrosion layer; 4. silicone ring; 5. rubber layer; 6. bellows; 7. foam layer; 8. threaded block; 9. ball head; 10. sealing gasket; 11. disc; 12. joint; 13. rubber pad; 14. pressure plate; 15. fastening shell. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0025] See also Figure 1-6 , the utility model provides a technical solution:

[0026] A stainless steel pipe resistant to intergranular corrosion comprises a stainless steel pipe 1, a pressing plate 14 and a fastening shell 15, wherein a galvanized layer 2 is provided inside the stainless steel pipe 1, an anti-corrosion layer 3 is coated on the outside of the stainless steel pipe 1, a silicone ring 4 is provided on the outside of the anti-corrosion layer 3, a rubber layer 5 is fixedly connected to the outside of the silicone ring 4, a bellows 6 is provided on the outside of the rubber layer 5, a foam layer 7 is filled inside the bellows 6, a threaded block 8 is fixedly connected to the outside of the stainless steel pipe 1, a ball head 9 is fixedly connected to one end of the stainless steel pipe 1, a sealing gasket 10 is fixedly connected to the outside of the ball head 9, a disc 11 is fixedly connected to the end of the stainless steel pipe 1 away from the ball head 9, a joint 12 is fixedly connected to the side of the disc 11 away from the stainless steel pipe 1, a rubber pad 13 is provided on one side of the disc 11, a pressing plate 14 is provided on the outside of the stainless steel pipe 1, and a fastening shell 15 is rotatably connected to the outside of the stainless steel pipe 1.

[0027] There are several silicone rings 4, and the distance between two adjacent silicone rings 4 is equal; the diameter of the ball head 9 is smaller than the diameter of the joint 12, and the diameter of the disc 11 is larger than the diameter of the joint 12; the threaded block 8 and the fastening shell 15 are in a threaded connection relationship; there are two rubber pads 13 on a stainless steel tube 1, which are respectively arranged on both sides of the pressure plate 14.

[0028] Working process: The stainless steel pipe 1 resistant to intergranular corrosion can be used in the chemical industry, mainly for transporting chemical raw materials such as liquids or gases. A galvanized layer 2 is coated on the inside of the stainless steel pipe 1, and an anti-corrosion layer 3 is coated on the outside of the stainless steel pipe 1. A silicone ring 4 is fixed on the outside of the anti-corrosion layer 3, and the silicone rings 4 are arranged at equal intervals. A rubber layer 5 is fixed on the outside of the silicone ring 4, a bellows 6 is arranged on the outside of the rubber layer 5, and a foam layer 7 is filled between the bellows 6 and the rubber layer 5. A threaded block 8 is also fixedly connected to the outside of the stainless steel pipe 1, and the stainless steel pipe 1 is close to the rubber layer 5. A ball head 9 is fixedly connected to one end of the thread block 8, a sealing gasket 10 is fixed to the outside of the ball head 9, a disc 11 is fixedly connected to the other end of the stainless steel pipe 1, two rubber pads 13 and a pressure plate 14 are arranged on one side of the stainless steel pipe 1 on the disc 11, the pressure plate 14 is between the two rubber pads 13, a fastening shell 15 slides on the outside of the stainless steel pipe 1, and the fastening shell 15 restricts the rubber pad 13 and the pressure plate 14 between the fastening shell 15 and the disc 11. When the stainless steel pipe 1 needs to be used to transport chemical raw materials, the stainless steel pipes 1 are mutually tightened. During assembly, the ball head 9 is connected to the inside of the joint 12, the sealing gasket 10 is located between the two, and the fastening shell 15 is rotated. The fastening shell 15 and the threaded block 8 are threadedly connected. During the connection process, since the distance between the fastening shell 15 and the threaded block 8 is gradually reduced, the fastening shell 15 will press the rubber pad 13 and the pressure plate 14. The two rubber pads 13 are located between the fastening shell 15 and the disc 11. When the fastening shell 15 and the threaded block 8 are rotated for connection, the pressure plate 14 can seal between the rubber pads 13 to prevent the raw material from leaking from the gap. After 1 is connected and tightened to each other, the raw materials are transported in the pipeline, and the galvanized layer 2 can protect the pipeline to prevent the raw materials from corroding the stainless steel pipe 1, and the thickness of the galvanized layer 2 is thicker, which can slow down the raw materials from scouring the pipeline and reduce the wear and tear of the pipeline. There is also an anti-corrosion layer 3 on the outside of the stainless steel pipe 1 to prevent external corrosion of the stainless steel pipe 1. The silicone ring 4, rubber layer 5, bellows 6 and foam layer 7 can slow down the external impact on the stainless steel pipe 1 and protect the pipeline, prevent the pipeline from being dented or broken after the impact, protect the pipeline and reduce losses.

[0029] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe resistant to intergranular corrosion, comprising a stainless steel pipe (1), a pressing plate (14) and a fastening shell (15), characterized in that: The stainless steel pipe (1) is provided with a galvanized layer (2) inside, the stainless steel pipe (1) is coated with an anti-corrosion layer (3) outside, a silicone ring (4) is provided outside the anti-corrosion layer (3), a rubber layer (5) is fixedly connected to the outside of the silicone ring (4), a bellows (6) is provided outside the rubber layer (5), the bellows (6) is filled with a foam layer (7), a threaded block (8) is fixedly connected to the outside of the stainless steel pipe (1), a ball head (9) is fixedly connected to one end of the stainless steel pipe (1), a sealing gasket (10) is fixedly connected to the outside of the ball head (9), a disc (11) is fixedly connected to the end of the stainless steel pipe (1) away from the ball head (9), a joint (12) is fixedly connected to the side of the disc (11) away from the stainless steel pipe (1), a rubber gasket (13) is provided on one side of the disc (11), a pressure plate (14) is provided outside the stainless steel pipe (1), and a fastening shell (15) is rotatably connected to the outside of the stainless steel pipe (1).

2. The intergranular corrosion resistant stainless steel pipe according to claim 1, characterized in that: The number of the silicone rings (4) is a plurality, and the distance between two adjacent silicone rings (4) is equal.

3. The intergranular corrosion resistant stainless steel pipe according to claim 1, characterized in that: The diameter of the ball head (9) is smaller than the diameter of the joint (12), and the diameter of the disc (11) is larger than the diameter of the joint (12).

4. The intergranular corrosion resistant stainless steel pipe according to claim 1, characterized in that: The threaded block (8) and the fastening shell (15) are in a threaded connection relationship.

5. The intergranular corrosion resistant stainless steel pipe according to claim 1, characterized in that: The number of rubber pads (13) on one of the stainless steel tubes (1) is two, which are respectively arranged on both sides of the pressing plate (14).

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