A cold-drawn precision welded steel pipe with anti-corrosion structure

Abstract

A cold-drawn precision welded steel pipe with an anti-corrosion structure, wherein an annular groove is provided inside the steel pipe body, anti-corrosion pipes are provided at both ends of the steel pipe body, an annular block is provided inside the anti-corrosion pipe, and a positioning block for limiting the annular groove is provided on the annular block. The annular block is threadedly connected to the anti-corrosion pipe. When hard materials such as cement and sand are transmitted in the steel pipe body, they will not contact the steel pipe body but will contact the annular groove. In this process, no irreversible damage will be caused to the steel pipe body. When the annular groove is damaged, the annular groove can be replaced, thereby increasing the service life of the steel pipe body.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipes, in particular to a cold-drawn precision welded steel pipe with an anti-corrosion structure. Background Art

[0002] For high-rise buildings, after each floor is completed, the roof of each floor needs to be capped, and the top floor slab needs to be smoothed with concrete. The transmission of concrete slurry generally uses large pipes. Traditional pipes are mostly made of cold-drawn precision steel pipes, which are pulled up to the top of the floor by power. During the pulling process, since the materials include cement, sand and other hard materials, it is very easy to cause irreversible damage to the pipes during the transmission process, which will shorten the service life of the steel pipes. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a cold-drawn precision welded steel pipe with an anti-corrosion structure.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold-drawn precision welded steel pipe with an anti-corrosion structure, comprising a steel pipe body, an annular groove is provided inside the steel pipe body, anti-corrosion pipes are provided at both ends of the steel pipe body, an annular stopper is provided inside the anti-corrosion pipe, a positioning block is provided on the annular stopper for limiting the annular groove, and the annular stopper is threadedly connected to the anti-corrosion pipe.

[0007] In order to improve the sealing performance between the annular groove and the steel pipe body, the utility model is improved in that limiting grooves are provided at both ends of the annular groove, and sealing rings are provided inside the limiting grooves, and the sealing rings contact the inner wall of the steel pipe body.

[0008] In order to facilitate the assembly of the annular stopper, the utility model has the following improvements: a plurality of positioning grooves are provided on the annular stopper, positioning blocks are provided inside the positioning grooves, and the positioning blocks are threadedly connected to the positioning grooves.

[0009] In order to increase the service life of the annular groove, the utility model is improved in that anti-wear particles are provided on the inner wall of the annular groove.

[0010] Furthermore, the utility model is improved in that an anti-corrosion coating is provided on the inner wall and outer wall of the steel pipe body and the inner wall and outer wall of the annular groove.

[0011] Furthermore, the improvement of the utility model is that the anti-corrosion coating adopts epoxy resin coating.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a cold-drawn precision welded steel pipe with an anti-corrosion structure, which has the following beneficial effects:

[0014] The cold-drawn precision welded steel pipe with an anti-corrosion structure will not contact the steel pipe body but the annular groove when cement, sand and other hard materials are transmitted in the steel pipe body. In this process, no irreversible damage will be caused to the steel pipe body. When the annular groove is damaged, the annular groove can be replaced, thereby increasing the service life of the steel pipe body.

[0015] When the annular groove needs to be replaced, the annular stopper is removed, and then the annular groove is pushed out of the steel pipe body, which is convenient for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the internal structure of the positioning groove in the utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the sealing ring in the utility model;

[0020] In the figure: 1. Steel pipe body; 2. Anti-corrosion pipe; 3. Annular groove; 4. Annular stopper; 5. Positioning block; 6. Positioning groove; 7. Limiting groove; 8. Sealing ring. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-4 The utility model discloses a cold-drawn precision welded steel pipe with an anti-corrosion structure, comprising a steel pipe body 1, wherein an annular groove 3 is arranged inside the steel pipe body 1, and anti-corrosion pipes 2 are arranged at both ends of the steel pipe body 1, and an annular stopper 4 is arranged inside the anti-corrosion pipe 2, and a positioning block 5 for limiting the annular groove 3 is arranged on the annular stopper 4, and the annular stopper 4 is threadedly connected with the anti-corrosion pipe 2;

[0023] In this structure, the annular groove 3 is installed in the steel pipe body 1, and then the annular stopper 4 is fixed in the anti-corrosion pipe 2. At this time, the positioning block 5 can contact the two ends of the annular groove 3, so that the annular groove 3 can be fixed in the steel pipe body 1. When hard materials such as cement and sand are transmitted in the steel pipe body 1, they will not contact the steel pipe body 1 but the annular groove 3. In this process, no irreversible damage will be caused to the steel pipe body 1. When the annular groove 3 is damaged, the annular groove 3 can be replaced, thereby improving the service life of the steel pipe body 1.

[0024] The annular stopper 4 is removed, and then the annular groove 3 is pushed out of the steel pipe body 1. The structure is simple and the replacement is convenient.

[0025] In this structure, limit grooves 7 are provided at both ends of the annular groove 3, and sealing rings 8 are provided inside the limit grooves 7. The sealing rings 8 contact the inner wall of the steel pipe body 1. The sealing rings 8 can ensure the sealing between the annular groove 3 and the steel pipe body 1, and prevent the material from entering between the steel pipe body 1 and the annular groove 3.

[0026] The lack of force points on the annular stopper 4 will make it difficult to assemble the annular stopper 4. The annular stopper 4 is provided with a plurality of positioning grooves 6. A positioning block 5 is provided inside the positioning groove 6. The positioning block 5 is threadedly connected to the positioning groove 6. The positioning groove 6 can be blocked by the positioning block 5 to prevent impurities from entering the positioning groove 6. After the positioning block 5 is disassembled, the designated toggle rod is inserted into the positioning groove 6, which can provide a force point on the annular stopper 4 and facilitate the assembly of the annular stopper 4.

[0027] Furthermore, anti-wear particles are provided on the inner wall of the annular groove 3. The rough inner wall can improve the anti-wear effect of the annular groove 3, mainly based on increasing the friction resistance of the fluid when flowing in the annular groove 3, thereby slowing down the flow rate and reducing the scouring effect of the fluid on the pipe wall.

[0028] Furthermore, the inner wall and outer wall of the steel pipe body 1 and the inner wall and outer wall of the annular groove 3 are provided with an anti-corrosion coating. The anti-corrosion coating adopts epoxy resin coating. The epoxy resin coating can firmly adhere to the surface of the pipeline to form a tight protective film. This strong adhesion can effectively prevent the coating from peeling off or peeling off, thereby protecting the pipeline from erosion by external corrosive media for a long time.

[0029] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A cold-drawn precision welded steel pipe with an anti-corrosion structure, comprising a steel pipe body (1), characterized in that: The steel pipe body (1) is provided with an annular groove (3) inside, and anti-corrosion pipes (2) are provided at both ends of the steel pipe body (1). An annular stopper (4) is provided inside the anti-corrosion pipe (2), and a positioning block (5) is provided on the annular stopper (4) for limiting the annular groove (3). The annular stopper (4) is threadedly connected to the anti-corrosion pipe (2).

2. The cold-drawn precision welded steel pipe with an anti-corrosion structure according to claim 1, characterized in that: Limiting grooves (7) are provided at both ends of the annular groove (3), and sealing rings (8) are provided inside the limiting grooves (7), and the sealing rings (8) contact the inner wall of the steel pipe body (1).

3. The cold-drawn precision welded steel pipe with an anti-corrosion structure according to claim 2, characterized in that: The annular stopper (4) is provided with a plurality of positioning grooves (6), the interior of the positioning groove (6) is provided with a positioning block (5), and the positioning block (5) is threadedly connected to the positioning groove (6).

4. The cold-drawn precision welded steel pipe with an anti-corrosion structure according to claim 3, characterized in that: Anti-wear particles are provided on the inner wall of the annular groove (3).

5. The cold-drawn precision welded steel pipe with an anti-corrosion structure according to claim 4, characterized in that: The inner wall and outer wall of the steel pipe body (1) and the inner wall and outer wall of the annular groove (3) are all provided with an anti-corrosion coating.

6. The cold-drawn precision welded steel pipe with an anti-corrosion structure according to claim 5, characterized in that: The anti-corrosion coating is epoxy resin paint.

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