Steel-plastic composite pipe with steel flange plates at ports

Abstract

The utility model relates to the technical field of composite pipes, in particular to a steel-plastic composite pipe with a steel flange plate at a port, which comprises a plastic pipe body, a built-in steel belt and the steel flange plate, the built-in steel belt is arranged in the plastic pipe body along the axial direction of the plastic pipe body, and outer-layer plastic is stripped at the port of the plastic pipe body to expose the built-in steel belt. The steel flange plate is fixedly connected to the exposed part of the built-in steel belt, and the end of the steel flange plate and the exposed part of the built-in steel belt are coated in an injection molding mode to form an injection molding coating layer. According to the steel-plastic composite pipe with the steel flange plates at the ports, the steel flange plates are tightly connected with the exposed parts of the built-in steel belts, and then injection molding coating is carried out, so that a firm protection layer can be formed, and looseness or leakage of the steel-plastic composite pipe and other pipelines or equipment at the joint is effectively prevented; and therefore, the connection stability of the steel-plastic composite pipe and other pipelines or equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of composite pipes, and in particular to a steel-plastic composite pipe with a steel flange at a port. Background Art

[0002] With the continuous development of the industrial field, the requirements for pipeline materials are also increasing. As a new type of pipe, steel-plastic composite pipe has been widely used in the industrial field due to its unique performance advantages. Steel-plastic composite pipe usually needs to be reliably connected with other pipes or equipment to ensure the stability and safety of the pipeline system.

[0003] Traditional steel-plastic composite pipes are usually connected to other pipes or equipment by hot melting. First, prepare the necessary connectors, check to ensure that the pipes and connectors are not damaged or defective, then clean the connecting surfaces of the pipes and connectors, then align the pipes and connectors to ensure that their axes coincide and the connecting surfaces fit tightly. Finally, use a hot melt welding machine to heat the connecting surfaces of the pipes and connectors until the connecting surfaces reach a certain temperature and become soft enough and easy to fuse. After heating to the appropriate temperature, press the pipes and connectors together to fuse them together. After the welding is completed, let the connection cool naturally until it reaches room temperature and is completely solidified.

[0004] Regarding the above-mentioned related technologies, since temperature control is the key in hot-melt connection, too high or too low temperature may affect the connection quality, resulting in quality problems such as loose welding, bubbles, cracks, etc. at the connection between the steel-plastic composite pipe and other pipes or equipment, affecting the stability of the connection between the steel-plastic composite pipe and other pipes or equipment. Utility Model Content

[0005] In order to improve the connection stability between the steel-plastic composite pipe and other pipelines or equipment, the present application provides a steel-plastic composite pipe with a steel flange at the port.

[0006] The present application provides a steel-plastic composite pipe with a steel flange at the port, which adopts the following technical solution:

[0007] A steel-plastic composite pipe with a steel flange at the end, comprising a plastic pipe body, an internal steel belt and a steel flange;

[0008] The built-in steel belt is built into the plastic tube body along the axial direction of the plastic tube body;

[0009] The outer plastic layer at the end of the plastic pipe body is peeled off to expose the inner steel belt, and the steel flange is fixedly connected to the exposed part of the inner steel belt;

[0010] The steel flange end and the exposed portion of the built-in steel belt are injection-molded to form an injection-molded coating layer.

[0011] By adopting the above technical scheme, the outer layer of plastic at the port of the plastic pipe body is first peeled off to expose part of the built-in steel belt inside the plastic pipe body, and then the steel flange is fixedly connected to the exposed part of the built-in steel belt. After the connection is completed, the end of the steel flange and the exposed part of the built-in steel belt are injection-molded. The steel-plastic composite pipe with a steel flange at the port is provided to form a solid protective layer by tightly connecting the steel flange and the exposed part of the built-in steel belt and then performing injection-molding coating, which effectively prevents the steel-plastic composite pipe from loosening or leaking at the connection with other pipelines or equipment, thereby improving the connection stability between the steel-plastic composite pipe and other pipelines or equipment.

[0012] Preferably, the built-in steel belt is provided with a plurality of punched holes, and the plurality of punched holes are evenly distributed along the length direction of the built-in steel belt.

[0013] By adopting the above technical solution, punching holes on the steel belt can create support points or fixed points to enhance the overall structural stability of the pipeline. When the pipeline is subjected to external force, these punching points can disperse the pressure to prevent the pipeline from deformation or rupture; at the same time, opening multiple punching holes on the built-in steel belt can effectively reduce the weight of the steel belt and reduce the weight of the entire steel-plastic composite pipe, thereby facilitating the transportation of the steel-plastic composite pipe; secondly, punching holes is beneficial to improving the heat dissipation performance of the built-in steel belt, reducing the temperature of the steel belt and surrounding materials when the pipeline system transports high-temperature media, and extending the service life of the pipeline system.

[0014] Preferably, the steel flange comprises a flange body and a connecting piece;

[0015] The flange body is provided with a fixing hole adapted to the punching hole;

[0016] The connecting piece is used to connect the flange body and the exposed portion of the built-in steel belt.

[0017] By adopting the above technical solution, the fixing holes on the flange body are matched with the punching holes on the built-in steel belt, which is convenient for ensuring accurate positioning during the connection process, making the connection between the steel flange and the built-in steel belt tighter and more reliable, which is beneficial to improving the connection stability between the steel-plastic composite pipe and other pipelines or equipment and the sealing performance of the pipeline system, preventing medium leakage to ensure the normal operation of the pipeline system.

[0018] Preferably, the connecting member includes a bolt or a rivet, and the bolt or the rivet passes through the fixing hole and the punching hole in sequence to tightly connect the steel flange and the exposed portion of the built-in steel belt.

[0019] By adopting the above technical solution, bolts or rivets as connecting parts can provide strong connecting force and withstand high pressure and tension, ensuring a tight connection between the steel flange and the exposed part of the built-in steel belt; when bolts are used as connecting parts, the tightness of the connection can be adjusted by adjusting the tightening degree of the bolts, which is beneficial for operators to fine-tune the connection tightness between the steel flange and the built-in steel belt according to actual needs during the installation process, and ensure the stability of the connection. At the same time, bolts and rivets, as common connecting parts, have a wide range of applicability and can adapt to steel flanges and built-in steel belts of different specifications and sizes, thereby meeting the connection needs of various pipeline systems.

[0020] Preferably, the flange body is welded to the exposed portion of the built-in steel belt.

[0021] By adopting the above technical solution, welding makes the connection strength between the flange body and the exposed part of the built-in steel belt extremely high, which can withstand greater tension and pressure, ensuring the stability and safety of the pipeline system; at the same time, the welding connection can form a continuous weld and eliminate the gap at the connection, thereby effectively preventing medium leakage and reducing the use of connectors; in addition, the welding connection can also adapt to the exposed parts of the built-in steel belts of different specifications and shapes, and perform local reinforcement or repair as needed, thereby improving the service life and safety of the pipeline system.

[0022] Preferably, a sealing gasket is provided on the outer side of the steel flange.

[0023] By adopting the above technical solution, the provided sealing gasket can fill the tiny gap between the flange and the connecting component to prevent leakage of the medium. Especially in high pressure, high temperature or corrosive environment, the sealing gasket can significantly improve the sealing performance of the pipeline system and ensure stable operation of the system. A close contact surface is formed between the sealing gasket and the flange and the connecting component, so that the steel-plastic composite pipe can maintain a stable connection state even when affected by external factors such as vibration, impact or temperature change.

[0024] Preferably, the injection-molded coating layer is made of a high-pressure-resistant and corrosion-resistant polymer composite material.

[0025] By adopting the above technical solutions, polymer composite materials usually have excellent pressure resistance and good chemical corrosion resistance, can withstand higher working pressure and resist corrosion from various acids, alkalis, salts and other chemical substances, and provide additional protection for steel-plastic composite pipes, enabling them to cope with higher pressure working environments, thereby improving the overall pressure resistance and corrosion resistance of the pipeline system.

[0026] Preferably, the injection-molded coating layer is also coated with an anti-corrosion layer.

[0027] By adopting the above technical solution, the anti-corrosion layer can provide additional protection for the injection molded coating layer, significantly enhancing the anti-corrosion ability of the entire pipeline system and preventing it from being eroded by corrosive media in the external environment. Especially in harsh environmental conditions, such as humid, acidic or alkaline environments, the role of the anti-corrosion layer is particularly important. By preventing direct contact between the corrosive medium and the injection molded coating layer, the anti-corrosion layer can reduce the corrosion rate and extend the service life of the pipeline system; in addition, the anti-corrosion coating can increase the gloss, color and texture of the material, making it more aesthetically pleasing.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The steel-plastic composite pipe with a steel flange at the port is set to form a solid protective layer by tightly connecting the steel flange with the exposed part of the built-in steel belt and then performing injection molding coating, which effectively prevents the steel-plastic composite pipe from loosening or leaking at the connection with other pipelines or equipment, thereby improving the connection stability between the steel-plastic composite pipe and other pipelines or equipment.

[0030] 2. Punching holes on the steel belt can create support points or fixed points to enhance the overall structural stability of the pipeline. When the pipeline is subjected to external forces, these punching points can disperse the pressure and prevent the pipeline from deformation or rupture. At the same time, opening multiple punching holes on the built-in steel belt can effectively reduce the weight of the steel belt and the weight of the entire steel-plastic composite pipe, thereby facilitating the transportation of the steel-plastic composite pipe. Secondly, punching holes is conducive to improving the heat dissipation performance of the built-in steel belt, reducing the temperature of the steel belt and surrounding materials when the pipeline system transports high-temperature media, and extending the service life of the pipeline system.

[0031] 3. The set sealing gasket can fill the tiny gap between the flange and the connecting parts to prevent the leakage of the medium. Especially in high pressure, high temperature or corrosive environment, the sealing gasket can significantly improve the sealing performance of the pipeline system and ensure the stable operation of the system; the sealing gasket forms a close contact surface with the flange and the connecting parts, so that the steel-plastic composite pipe can maintain a stable connection state even when affected by external factors such as vibration, impact or temperature change. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the steel-plastic composite pipe with a steel flange at the port in Example 1 of the present application.

[0033] Figure 2 It is a cross-sectional view of a steel-plastic composite pipe with a steel flange at one end in Example 1 of the present application.

[0034] Figure 3 It is a schematic diagram of the overall structure of the steel-plastic composite pipe with a steel flange at port 2 of the embodiment of the present application.

[0035] Figure 4 It is a cross-sectional view of a steel-plastic composite pipe with a steel flange at port 2 of an embodiment of the present application.

[0036] Explanation of the accompanying drawings: 1. Plastic pipe body; 2. Built-in steel belt; 21. Punching hole; 3. Steel flange; 31. Flange body; 311. Fixing hole; 32. Connector; 321. Bolt; 322. Rivet; 33. Sealing gasket; 34. Injection molding coating; 4. Anti-corrosion layer. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] The application discloses a steel-plastic composite pipe with a steel flange at the port.

[0039] Example 1

[0040] Reference Figure 1 and Figure 2 A steel-plastic composite pipe with a steel flange at the end includes a plastic pipe body 1, an inner steel belt 2 and a steel flange 3.

[0041] Reference Figure 1 and Figure 2 , the built-in steel belt 2 is arranged in the plastic tube layer of the plastic tube body 1, and the built-in steel belt 2 is distributed along the axial direction of the plastic tube body 1, the outer plastic layer of the tube body is peeled off at the two fractures of the plastic tube body 1 and the built-in steel belt 2 is exposed, and the steel flange 3 is fixedly connected to the exposed part of the built-in steel belt 2; in the present application, the steel flange 3 includes a flange body 31 and a connecting piece 32, and the connecting piece 32 includes a bolt 321 or a rivet 322. A plurality of punching holes 21 are opened on the built-in steel belt 2, and the plurality of punching holes 21 are evenly distributed along the length direction of the built-in steel belt 2. A fixing hole 311 matching the size of the punching hole 21 is opened on the flange body 31, and the bolt 321 or the rivet 322 sequentially passes through the fixing hole 311 and the punching hole 21 and extends into the inner plastic layer of the plastic tube body 1 to tightly connect the steel flange 3 with the exposed part of the built-in steel belt 2.

[0042] Reference Figure 1 and Figure 2In order to improve the sealing performance of the pipeline system, a close contact surface is formed between the sealing gasket 33 and the steel flange 3 and the connecting parts to ensure that the steel-plastic composite pipe maintains a stable connection state when it is affected by external factors such as vibration, impact or temperature change. In this application, a sealing gasket 33 is also provided on the outside of the steel flange 3; the steel flange 3 is close to the plastic pipe body 1. The exposed part of the built-in steel belt 2 is injection-molded to form an injection-molded coating layer 34. The injection-molded coating layer 34 is made of a high-pressure resistant and corrosion-resistant polymer composite material. In this application, the injection-molded coating layer 34 can be It can be made of thermoplastic resin, thermosetting resin, or engineering plastic. In the present embodiment, the injection molded coating 34 is made of thermoplastic resin. In addition, in order to enhance the corrosion resistance of the entire pipeline system and prevent it from being corroded by corrosive media in the external environment, the injection molded coating 34 in the present application is also coated with an anti-corrosion layer 4. In the present application, the anti-corrosion layer 4 can be an external three-layer polyethylene anti-corrosion layer, an internal epoxy fiberglass lined anti-corrosion layer, or an anti-corrosion paint. In the present embodiment, the anti-corrosion layer 4 is configured as an external three-layer polyethylene anti-corrosion layer 4.

[0043] The implementation principle of the steel-plastic composite pipe with a steel flange at the port in Example 1 of the present application is as follows: first, the outer layer of plastic at the port of the plastic pipe body 1 is peeled off to expose part of the built-in steel belt 2 embedded in the plastic pipe body 1, and then the steel flange 3 is fixedly connected to the exposed part of the built-in steel belt 2 through the connecting piece 32. After the connection is completed, the end of the steel flange 3 and the exposed part of the built-in steel belt 2 are injection-molded and coated with an anti-corrosion layer 4.

[0044] Example 2

[0045] Reference Figure 3 and Figure 4 , Embodiment 2 of the present application is different from Embodiment 1 in that, in the present embodiment, the flange body 31 is directly welded to the exposed outer wall of the built-in steel belt 2 .

[0046] The implementation principle of the steel-plastic composite pipe with a steel flange at the port in Example 2 of the present application is as follows: first, the outer layer of plastic at the port of the plastic pipe body 1 is peeled off to expose part of the built-in steel belt 2 inside the plastic pipe body 1, and then the steel flange 3 is welded to the exposed part of the built-in steel belt 2. After the connection is completed, the end of the steel flange 3 and the exposed part of the built-in steel belt 2 are injection molded and coated with an anti-corrosion layer 4.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steel-plastic composite pipe with a steel flange at the end, characterized in that: It comprises a plastic pipe body (1), an internal steel belt (2) and a steel flange (3); The built-in steel belt (2) is built into the plastic tube body (1) along the axial direction of the plastic tube body (1); The outer plastic layer at the end of the plastic pipe body (1) is peeled off to expose the inner steel belt (2), and the steel flange (3) is fixedly connected to the exposed part of the inner steel belt (2); The end of the steel flange (3) and the exposed portion of the built-in steel belt (2) are injection-molded to form an injection-molded coating layer (34).

2. The steel-plastic composite pipe with a steel flange at the end according to claim 1, characterized in that: The built-in steel belt (2) is provided with a plurality of punched holes (21), and the plurality of punched holes (21) are evenly distributed along the length direction of the built-in steel belt (2).

3. The steel-plastic composite pipe with a steel flange at the end according to claim 2 is characterized in that: The steel flange (3) comprises a flange body (31) and a connecting piece (32); The flange body (31) is provided with a fixing hole (311) adapted to the punching hole (21); The connecting piece (32) is used to connect the flange body (31) and the exposed portion of the built-in steel belt (2).

4. The steel-plastic composite pipe with a steel flange at the end according to claim 3 is characterized in that: The connecting member (32) comprises a bolt (321) or a rivet (322), and the bolt (321) or the rivet (322) passes through the fixing hole (311) and the punching hole (21) in sequence to tightly connect the steel flange (3) and the exposed part of the built-in steel belt (2).

5. The steel-plastic composite pipe with a steel flange at the end according to claim 3 is characterized in that: The flange body (31) is welded to the exposed portion of the built-in steel belt (2).

6. The steel-plastic composite pipe with a steel flange at the end according to claim 3, characterized in that: A sealing gasket (33) is provided on the outer side of the steel flange (3).

7. The steel-plastic composite pipe with a steel flange at the end according to claim 1, characterized in that: The injection-molded coating layer (34) is made of a high-pressure-resistant and corrosion-resistant polymer composite material.

8. The steel-plastic composite pipe with a steel flange at the end according to claim 1, characterized in that: The injection-molded coating layer (34) is also coated with an anti-corrosion layer (4).

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