Corrosion-resistant stainless steel pipe structure

Abstract

The utility model provides a corrosion-resistant stainless steel pipe structure which comprises a stainless steel outer pipe and a polystyrene inner pipe, the polystyrene inner pipe is connected in the stainless steel outer pipe in a nested mode, and a heat preservation layer is arranged between the stainless steel outer pipe and the polystyrene inner pipe. L-shaped limiting rings connected with the stainless steel outer pipe in a nested mode are arranged at the two ends of the polystyrene inner pipe correspondingly. According to the stainless steel pipe structure, the corrosion resistance is effectively improved through the polystyrene inner pipe embedded in the stainless steel pipe structure, and meanwhile the heat preservation layer is arranged between the polystyrene inner pipe and the stainless steel outer pipe, so that the stainless steel pipe has good heat preservation performance and can be used in a low-temperature environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of stainless steel pipes and relates to a corrosion-resistant stainless steel pipe structure. Background Art

[0002] Currently in the field of chemical processing, a large amount of chemical liquids have strong corrosion resistance during processing. Traditional stainless steel pipes are prone to internal corrosion of stainless steel pipes when transporting chemical liquids for a long time, affecting the corrosion performance and service life of stainless steel pipes.

[0003] In order to improve the corrosion resistance of traditional stainless steel, the main method is to plate an anti-corrosion coating on the inside of the stainless steel pipe to improve the anti-corrosion effect of the stainless steel pipe. Although this method can achieve anti-corrosion performance, it is easy to cause local damage to the anti-corrosion coating during long-term use, affecting the service life of the anti-corrosion. For this reason, we have designed a corrosion-resistant stainless steel pipe structure to solve the above technical problems. Summary of the invention

[0004] The purpose of the utility model is to provide a corrosion-resistant stainless steel pipe structure to solve the problems raised in the above background technology.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a corrosion-resistant stainless steel pipe structure, comprising a stainless steel outer pipe and a polypropylene inner pipe, the polypropylene inner pipe is nested and connected inside the stainless steel outer pipe, an insulation layer is arranged between the stainless steel outer pipe and the polypropylene inner pipe, and both ends of the polypropylene inner pipe are provided with L-shaped limit rings nested and connected with the stainless steel outer pipe.

[0006] In the above-mentioned corrosion-resistant stainless steel pipe structure, the outer walls at both ends of the stainless steel outer pipe are welded with integral connecting flanges, and a plurality of assembly holes are equidistantly provided on the surface of the connecting flanges.

[0007] In the above-mentioned corrosion-resistant stainless steel pipe structure, the outer wall of the connecting flange is equidistantly threaded with four locking bolts, the end face of the L-shaped limiting ring is equidistantly provided with four screw holes, and the four locking bolts are threadedly connected to the corresponding screw holes.

[0008] In the above-mentioned corrosion-resistant stainless steel pipe structure, a rubber sealing ring is sleeved at the nesting position between the L-shaped limiting ring and the stainless steel outer pipe.

[0009] In the above-mentioned corrosion-resistant stainless steel pipe structure, the insulation layer consists of a first insulation cotton layer, a foam cotton layer and a second insulation cotton layer. The surface of the first insulation cotton layer is bonded to the foam cotton layer, and the surface of the foam cotton layer is bonded to the second insulation cotton layer.

[0010] In the above-mentioned corrosion-resistant stainless steel pipe structure, the surface of the stainless steel outer pipe is painted with evenly distributed anti-corrosion paint.

[0011] Compared with the prior art, the advantages of the corrosion-resistant stainless steel pipe structure of the utility model are as follows: the stainless steel pipe structure effectively improves the corrosion resistance through the internally nested polypropylene inner pipe, and at the same time, the insulation layer arranged between the polypropylene inner pipe and the stainless steel outer pipe makes the stainless steel pipe have better insulation performance and can be used in relatively low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a structural schematic diagram of a corrosion-resistant stainless steel pipe structure.

[0013] Figure 2 The utility model is a structural schematic diagram of a corrosion-resistant stainless steel pipe structure.

[0014] Figure 3 The utility model is a structural schematic diagram of a corrosion-resistant stainless steel pipe structure.

[0015] Figure 4 The utility model is a structural schematic diagram of a corrosion-resistant stainless steel pipe structure.

[0016] In the figure, 1. stainless steel outer tube; 2. connecting flange; 3. L-shaped limit ring; 4. locking bolt; 5. polypropylene inner tube; 6. insulation layer; 601. first insulation cotton layer; 602. foam cotton layer; 603. second insulation cotton layer; 7. screw hole. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1-4 As shown, the utility model is a corrosion-resistant stainless steel pipe structure, comprising a stainless steel outer tube 1 and a polypropylene inner tube 5. The polypropylene inner tube 5 is nested and connected inside the stainless steel outer tube 1, an insulation layer 6 is arranged between the stainless steel outer tube 1 and the polypropylene inner tube 5, and both ends of the polypropylene inner tube 5 are provided with L-shaped limit rings 3 nested and connected to the stainless steel outer tube 1.

[0019] Specifically, the stainless steel pipe structure effectively improves the corrosion resistance through the internally nested polypropylene inner pipe 5. At the same time, the thermal insulation layer 6 arranged between the polypropylene inner pipe 5 and the stainless steel outer pipe 1 makes the stainless steel pipe have better thermal insulation performance and can be used in relatively low temperature environments.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model is a corrosion-resistant stainless steel pipe structure, the outer walls of both ends of the stainless steel outer pipe 1 are welded with connecting flanges 2 connected as one body, and the surface of the connecting flange 2 is provided with a plurality of equidistant assembly holes.

[0021] The outer wall of the connecting flange 2 is equidistantly threaded with four locking bolts 4 , and the end surface of the L-shaped limiting ring 3 is equidistantly provided with four screw holes 7 , and the four locking bolts 4 are threadedly connected with the corresponding screw holes 7 .

[0022] Specifically, the locking bolt 4 is threadedly connected to the screw hole 7, so as to facilitate the L-shaped limiting ring 3 to be limited and fixed.

[0023] A rubber sealing ring is sleeved on the nesting position between the L-shaped limiting ring 3 and the stainless steel outer tube 1 .

[0024] Specifically, the sealing performance of the connection is improved by providing the rubber sealing ring.

[0025] The thermal insulation layer 6 is composed of a first thermal insulation cotton layer 601 , a foam cotton layer 602 and a second thermal insulation cotton layer 603 . The surface of the first thermal insulation cotton layer 601 is bonded to the foam cotton layer 602 , and the surface of the foam cotton layer 602 is bonded to the second thermal insulation cotton layer 603 .

[0026] Specifically, by providing the heat-insulating layer 6, the heat-insulating performance of the stainless steel pipe is increased, and the stainless steel pipe can be used in a relatively low temperature environment.

[0027] The surface of the stainless steel outer tube 1 is painted with evenly distributed anti-corrosion paint.

[0028] Specifically, the anti-corrosion performance of the stainless steel outer tube 1 is effectively ensured by applying the anti-corrosion paint.

[0029] In specific implementation, when processing the stainless steel pipe, the insulation layer 6 is first sleeved on the surface of the polypropylene inner tube 5, and then the polypropylene inner tube 5 and the stainless steel outer tube 1 are manually nested, and then the L-shaped limiting rings 3 are nested at both ends of the stainless steel outer tube 1, and then the locking bolts 4 are manually rotated to make the locking bolts 4 and the corresponding screw holes 7 threadedly fixed to complete the fixation of the L-shaped limiting rings 3, thereby limiting and fixing the polypropylene inner tube 5 to complete the assembly of the stainless steel pipe. The stainless steel pipe structure effectively improves the corrosion resistance through the nested polypropylene inner tube 5.

[0030] 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 specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A corrosion-resistant stainless steel pipe structure, comprising a stainless steel outer pipe (1) and a polypropylene inner pipe (5), characterized in that: A polypropylene inner tube (5) is nested and connected inside the stainless steel outer tube (1), a heat-insulating layer (6) is provided between the stainless steel outer tube (1) and the polypropylene inner tube (5), and both ends of the polypropylene inner tube (5) are provided with L-shaped limit rings (3) nested and connected to the stainless steel outer tube (1).

2. The corrosion-resistant stainless steel pipe structure according to claim 1, characterized in that: The outer walls of both ends of the stainless steel outer tube (1) are welded with integral connecting flanges (2), and a plurality of equidistant assembly holes are formed on the surface of the connecting flange (2).

3. A corrosion-resistant stainless steel pipe structure according to claim 2, characterized in that: The outer wall of the connecting flange (2) is equidistantly threaded with four locking bolts (4), the end surface of the L-shaped limiting ring (3) is equidistantly provided with four screw holes (7), and the four locking bolts (4) are threadedly connected to the corresponding screw holes (7).

4. The corrosion-resistant stainless steel pipe structure according to claim 3, characterized in that: A rubber sealing ring is sleeved at the nesting position between the L-shaped limiting ring (3) and the stainless steel outer tube (1).

5. The corrosion-resistant stainless steel pipe structure according to claim 1, characterized in that: The thermal insulation layer (6) is composed of a first thermal insulation cotton layer (601), a foam cotton layer (602) and a second thermal insulation cotton layer (603); the surface of the first thermal insulation cotton layer (601) is bonded and connected to the foam cotton layer (602); and the surface of the foam cotton layer (602) is bonded and connected to the second thermal insulation cotton layer (603).

6. The corrosion-resistant stainless steel pipe structure according to claim 1, characterized in that: The surface of the stainless steel outer tube (1) is painted with evenly distributed anti-corrosion paint.

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