Multilayer composite stainless steel seamless tube

Abstract

The utility model discloses a multilayer composite stainless steel seamless tube, which comprises a steel tube main body and a wear-resistant tube, the wear-resistant tube is arranged outside the steel tube main body, the inner wall of the steel tube main body is fixedly connected with a wear-resistant layer, and the outer wall of the steel tube main body is fixedly connected with a heat dissipation layer. A plurality of limiting blocks are fixedly connected to the outer wall of the heat dissipation layer in a surrounding mode, U-shaped blocks are fixedly connected to the positions, corresponding to the limiting blocks, of the inner wall of the wear-resisting pipe, one end of each limiting block extends into the corresponding U-shaped block, and elastic blocks are fixedly connected to the positions, corresponding to the U-shaped blocks, of the inner wall of the wear-resisting pipe. And a plurality of heat dissipation holes are formed in the outer wall of the heat dissipation layer in a surrounding mode at equal intervals in a penetrating mode, the steel pipe is protected, the abrasion resistance and heat dissipation performance of the steel pipe are improved, the service time of the steel pipe is prolonged, meanwhile, the steel pipe is protected, and the steel pipe is prevented from being damaged due to collision.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel seamless pipes, and specifically relates to a multi-layer composite stainless steel seamless pipe. Background Technique

[0002] A stainless steel seamless pipe is a long steel bar with a hollow cross-section and no seams around it. It has the characteristics of being resistant to corrosion by weak corrosive media such as air, steam, and water, as well as chemical corrosive media such as acids, alkalis, and salts. The production process of stainless steel seamless pipes includes various methods such as hot rolling, hot extrusion, and cold drawing, which involve a series of complex processes such as heating, piercing, sizing, cooling, and straightening of round tube blanks.

[0003] When seamless steel pipes are used to transport high-temperature media, due to the high-temperature effect, their inner walls are also easily corroded, resulting in a short service life and difficult heat dissipation. At the same time, when seamless steel pipes are impacted by external forces, they are easily damaged. Therefore, it is necessary to propose a multi-layer composite stainless steel seamless pipe. Content of the Utility Model

[0004] The purpose of the utility model is to provide a multi-layer composite stainless steel seamless pipe to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A multi-layer composite stainless steel seamless pipe, including a steel pipe main body and a wear-resistant pipe. The wear-resistant pipe is arranged outside the steel pipe main body. The inner wall of the steel pipe main body is fixedly connected with a wear-resistant layer. The outer wall of the steel pipe main body is fixedly connected with a heat dissipation layer. A number of limiting blocks are fixedly connected to the outer wall of the heat dissipation layer in a circumferential shape;

[0006] U-shaped blocks are fixedly connected to the inner wall of the wear-resistant pipe at positions corresponding to the limiting blocks, and one ends of the number of limiting blocks extend into the corresponding U-shaped blocks.

[0007] Preferably, elastic blocks are fixedly connected to the inner wall of the wear-resistant pipe at positions corresponding to the U-shaped blocks, and the other ends of the number of elastic blocks are abutted against the corresponding limiting blocks.

[0008] Preferably, a number of heat dissipation holes are evenly and circumferentially penetrated through the outer wall of the heat dissipation layer.

[0009] Preferably, screw holes are penetrated through the outer wall of the wear-resistant pipe on one side of the elastic blocks. The inner walls of the number of screw holes are all threadedly connected with fixing bolts, and one ends of the number of fixing bolts are abutted against the corresponding elastic blocks.

[0010] Preferably, the number of elastic blocks are all arranged in a Z shape.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The limiting block on the outer side of the steel pipe is inserted into the U-shaped block to protect the steel pipe. The wear-resistant layer increases the wear resistance of the inner wall of the steel pipe, and the heat dissipation layer can increase the heat dissipation of the steel pipe. The heat can be dissipated through the limiting block. The wear-resistant pipe protects the steel pipe. The steel pipe and the wear-resistant pipe are in a suspended state, and the impact force received by the wear-resistant pipe cannot be directly transmitted into the steel pipe, protecting the steel pipe, increasing the wear resistance and heat dissipation of the steel pipe, increasing the service time of the steel pipe, and at the same time protecting the steel pipe to prevent damage caused by impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a front view structural schematic diagram of the present utility model;

[0013] Figure 2 is a front view structural schematic diagram of the wear-resistant layer of the present utility model;

[0014] Figure 3 is a front view structural schematic diagram of the wear-resistant pipe of the present utility model.

[0015] In the figure: 1, steel pipe main body; 2, wear-resistant pipe; 3, wear-resistant layer; 4, heat dissipation layer; 5, limiting block; 6, U-shaped block; 7, elastic block; 8, heat dissipation hole; 9, screw hole; 10, fixing bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Please refer to Figures 1-3 , the present utility model provides a technical solution: a multi-layer composite stainless steel seamless pipe, including a steel pipe main body 1 and a wear-resistant pipe 2. The wear-resistant pipe 2 is arranged outside the steel pipe main body 1. The inner wall of the steel pipe main body 1 is fixedly connected with a wear-resistant layer 3. The outer wall of the steel pipe main body 1 is fixedly connected with a heat dissipation layer 4. A plurality of limiting blocks 5 are fixedly connected to the outer wall of the heat dissipation layer 4 in a surrounding manner;

[0017] U-shaped blocks 6 are fixedly connected to the inner walls of the wear-resistant pipes 2 at positions corresponding to the limiting blocks 5, and one ends of the plurality of limiting blocks 5 all extend into the corresponding U-shaped blocks 6. The wear-resistant layer 3 is a ceramic coating, and the heat dissipation layer 4 is an epoxy resin.

[0018] Among them, elastic blocks 7 are fixedly connected to the inner walls of the wear-resistant pipes 2 at positions corresponding to the U-shaped blocks 6, and the other ends of the plurality of elastic blocks 7 are abutted against the corresponding limiting blocks 5, which is convenient for using the elastic blocks 7 to push the limiting blocks 5 to move.

[0019] Among them, a plurality of heat dissipation holes 8 are equidistantly and penetratingly formed in the outer wall of the heat dissipation layer 4 in a surrounding manner, which is convenient for using the heat dissipation holes 8 to increase the heat dissipation of the steel pipe main body 1.

[0020] Among them, the outer wall of the wear-resistant tube 2 is located on one side of the spring block 7 and is penetrated by screw holes 9, the inner walls of several screw holes 9 are threadedly connected with fixing bolts 10, and one end of several fixing bolts 10 is against the corresponding spring block 7, so that the fixing bolts 10 can be used to limit the spring block 7.

[0021] Among them, a plurality of spring blocks 7 are arranged in a Z shape.

[0022] Specifically, when using the utility model, the limit block 5 outside the heat dissipation layer 4 is inserted into the U-shaped block 6, and then the spring block 7 is inserted into the U-shaped block 6, and the fixing bolt 10 is rotated into the screw hole 9 to limit the spring piece 7, and the steel pipe main body 1 can be used. The wear-resistant layer 3 increases the wear resistance of the steel pipe main body 1, and the heat dissipation layer 3 increases the heat dissipation of the steel pipe main body 1. The heat can be discharged through the limit block 5. When the stainless steel seamless steel pipe is hit, the wear-resistant tube 2 buffers the impact. Since the spring block 7 pushes the limit block 5 to separate from the U-shaped block 6, the impact force received by the wear-resistant tube 2 cannot be directly transmitted to the steel pipe main body 1, thereby protecting the steel pipe main body 1.

Claims

1. A multi-layer composite stainless steel seamless pipe, comprising a steel pipe body (1) and a wear-resistant pipe (2), characterized in that: A wear-resistant tube (2) is provided on the outside of the steel pipe body (1); a wear-resistant layer (3) is fixedly connected to the inner wall of the steel pipe body (1); a heat dissipation layer (4) is fixedly connected to the outer wall of the steel pipe body (1); and a plurality of limit blocks (5) are fixedly connected to the outer wall of the heat dissipation layer (4) in a surrounding shape; The inner wall of the wear-resistant pipe (2) is fixedly connected to a U-shaped block (6) at a position relative to the limit block (5), and one end of a plurality of the limit blocks (5) extends into the corresponding U-shaped block (6).

2. The multi-layer composite stainless steel seamless pipe according to claim 1, characterized in that: The inner wall of the wear-resistant tube (2) is fixedly connected to a spring block (7) at a position relative to the U-shaped block (6), and the other ends of a plurality of the spring blocks (7) are in contact with the corresponding limit blocks (5).

3. The multi-layer composite stainless steel seamless pipe according to claim 1, characterized in that: The outer wall of the heat dissipation layer (4) is provided with a plurality of heat dissipation holes (8) equidistantly and circumferentially.

4. The multi-layer composite stainless steel seamless pipe according to claim 1, characterized in that: The outer wall of the wear-resistant tube (2) is provided with screw holes (9) on one side of the elastic block (7), the inner walls of several screw holes (9) are threadedly connected with fixing bolts (10), and one end of several fixing bolts (10) abuts against the corresponding elastic block (7).

5. The multi-layer composite stainless steel seamless pipe according to claim 2, characterized in that: The plurality of spring blocks (7) are all arranged in a Z shape.

Images