Plastic-coated composite steel pipe convenient to weld

Abstract

The plastic-coated composite steel pipe convenient to weld comprises a steel pipe body and an insertion pipe, a groove is formed in one end of the steel pipe body, a limiting ring is fixedly connected to the outer wall of the circumference of the insertion pipe, two receding grooves are formed in the two ends of the insertion pipe respectively, elastic plates are fixedly connected to the interiors of the two receding grooves respectively, and the elastic plates are fixedly connected to the interiors of the two receding grooves respectively. A barb is fixedly connected to the surface of the elastic plate, the insertion pipe is inserted into the steel pipe body, an annular groove is formed in the circumferential outer wall of the limiting ring, the limiting ring and the groove are kept on the same horizontal plane, and the barb can make contact with the inner wall of the steel pipe body. According to the steel pipe, a worker can conveniently weld the two steel pipe bodies through the insertion pipe, meanwhile, the insertion pipe can be prevented from being easily moved out of the steel pipe bodies in the connecting process through the barbs, and the position of the insertion pipe in the steel pipe bodies can be limited through the limiting rings.

Description

Technical Field

[0001] This utility model relates to the field of plastic-coated steel pipe technology, and in particular to a plastic-coated composite steel pipe that is easy to weld. Background Technology

[0002] Plastic-coated composite steel pipe is a composite material made by coating a layer of corrosion-resistant plastic material on the surface of a steel pipe, and it is widely used in many fields.

[0003] For example, a high-performance corrosion-resistant plastic-coated composite steel pipe disclosed in announcement number CN217634315U can facilitate the transportation of fire-fighting water. Compared with ordinary steel pipe structures, the steel pipe structure provided by this utility model has the advantages of increasing the service life of the steel pipe and ensuring the strength of the steel pipe. However, the anti-corrosion coating on its surface makes it difficult to weld two steel pipes together, resulting in inconvenience in connecting the steel pipes. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a plastic-coated composite steel pipe that is easy to weld.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plastic-coated composite steel pipe that is easy to weld includes a steel pipe body and an insert. One end of the steel pipe body is provided with a groove. A limit ring is fixedly connected to the outer circumference of the insert. Two clearance grooves are provided at both ends of the insert. An elastic plate is fixedly connected inside the two clearance grooves. A barb is fixedly connected to the surface of the elastic plate.

[0007] As a further embodiment of this invention, the insertion tube is inserted into the interior of the steel pipe body.

[0008] As a further improvement of this utility model, the outer circumferential wall of the limiting ring is provided with an annular groove.

[0009] As a further improvement of this invention, the limiting ring and the groove are kept on the same horizontal plane.

[0010] As a further improvement of this invention, the barb can contact the inner wall of the steel pipe body.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model has a tube for easy welding between two steel pipe bodies by workers, which facilitates the connection of the steel pipe bodies and improves the convenience of the device.

[0013] 2. This utility model uses barbs to assist in fixing the steel pipe body and the insert tube, preventing the insert tube from easily moving out of the steel pipe body during the connection process, thus improving the stability of the device connection.

[0014] 3. This utility model can not only restrict the position of the insertion tube inside the steel pipe body through the limiting ring, but also facilitate the workers to position and connect the insertion tube with the steel pipe body through the groove. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a plastic-coated composite steel pipe that is easy to weld, as proposed in this utility model.

[0016] Figure 2 This is an enlarged structural diagram of the steel pipe body of a plastic-coated composite steel pipe that is easy to weld, as proposed in this utility model.

[0017] Figure 3 This is an enlarged schematic diagram of the insertion structure of a plastic-coated composite steel pipe that is easy to weld, as proposed in this utility model.

[0018] In the diagram: 1. Steel pipe body; 2. Inserted pipe; 3. Groove; 4. Limiting ring; 5. Annular groove; 6. Alternating groove; 7. Elastic plate; 8. Barb. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-3A weldable plastic-coated composite steel pipe includes a steel pipe body 1 and an insert 2. One end of the steel pipe body 1 has a groove 3 to facilitate positioning and docking of the insert 2 with the steel pipe body 1. A limiting ring 4 is welded to the outer circumference of the insert 2, which restricts the position of the insert 2 within the steel pipe body 1. Two clearance grooves 6 are provided at both ends of the insert 2, and elastic plates 7 are welded inside each groove 6. Barbs 8 are welded to the surface of the elastic plates 7. One end of the insert 2 is inserted into the interior of one end of the steel pipe body 1, and simultaneously, the elastic plate 7 at that end enters the interior of the steel pipe body 1, making the barbs 8 tightly contact the inner wall of the steel pipe body 1. The insert 2 is inserted until the limiting ring 4 contacts the groove 3. The operator welds the steel pipe body 1 and the insert 2 according to the position of the limiting ring 4 and the groove 3. This process is repeated to fix the other end of the insert 2 to the other steel pipe body 1, thus facilitating the welding of the two steel pipe bodies 1.

[0021] In this utility model, it should be noted that the elastic plate 7 can deform when it enters the steel pipe body 1. Under the cover of the steel pipe body 1, the barb 8 and the steel pipe body 1 are in closer contact. The insertion tube 2 is inserted into the inside of the steel pipe body 1. The outer circumferential wall of the limiting ring 4 is provided with an annular groove 5. The outer side of the limiting ring 4 and the groove 3 are kept on the same horizontal plane. The barb 8 can contact the inner wall of the steel pipe body 1. The barb 8 can provide auxiliary fixation between the steel pipe body 1 and the insertion tube 2, and prevent the insertion tube 2 from easily moving out of the steel pipe body 1 during the connection process.

[0022] Working principle: When welding two steel pipe bodies 1, first insert one end of the insertion tube 2 into the interior of one end of the steel pipe body 1. At the same time, the elastic plate 7 at this end enters the interior of the steel pipe body 1, and the barb 8 is in close contact with the inner wall of the steel pipe body 1. The insertion tube 2 is inserted into the interior of the steel pipe body 1 until the limiting ring 4 contacts the groove 3. The operator welds the steel pipe body 1 and the insertion tube 2 by using the position of the limiting ring 4 and the groove 3. Then, the above operation is repeated to fix the other end of the other steel pipe body 1 to the other end of the insertion tube 2, which facilitates the welding of the two steel pipe bodies 1.

[0023] Finally, it should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A weldable plastic-coated composite steel pipe, comprising a steel pipe body (1) and an insert (2), characterized in that, The steel pipe body (1) has a groove (3) at one end, and a limit ring (4) is fixedly connected to the outer circumference of the insertion tube (2). Two clearance grooves (6) are opened at both ends of the insertion tube (2). An elastic plate (7) is fixedly connected inside the two clearance grooves (6), and a barb (8) is fixedly connected to the surface of the elastic plate (7).

2. The easily weldable plastic-coated composite steel pipe according to claim 1, characterized in that, The insertion tube (2) is inserted into the inside of the steel pipe body (1).

3. The easily weldable plastic-coated composite steel pipe according to claim 1, characterized in that, The outer circumferential wall of the limiting ring (4) is provided with an annular groove (5).

4. The easily weldable plastic-coated composite steel pipe according to claim 3, characterized in that, The limiting ring (4) and the groove (3) are kept on the same horizontal plane.

5. The easily weldable plastic-coated composite steel pipe according to claim 1, characterized in that, The barb (8) can come into contact with the inner wall of the steel pipe body (1).

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