Steel-plastic composite pipe with engineering plastic flange plates at ports

Abstract

The utility model relates to a steel-plastic composite pipe with engineering plastic flange plates at ports, and belongs to the technical field of steel-plastic composite pipes, the steel-plastic composite pipe comprises a steel-plastic composite pipe body and the flange plates, the steel-plastic composite pipe body comprises a punching steel belt located in the middle and plastic layers located on the two sides of the punching steel belt, a connecting notch is formed in the outer plastic layer close to the end of the steel-plastic composite pipe to expose the punching steel belt, the flange plate is located on the connecting notch, and the steel-plastic composite pipe further comprises hot melting plastic which enters the connecting notch to be used for covering the punching steel belt and connecting the flange plate to the hot melting plastic. The connecting structure has the effect of improving the connecting stability between the steel-plastic composite pipes.

Description

Technical Field

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

[0002] Compared to pure plastic pipes, steel-plastic composite pipes offer greater rigidity and impact resistance. They are suitable not only for direct burial but also for overhead installation. They are widely used in water supply, gas, mining, chemical engineering, agricultural irrigation, and chemical water transportation. Steel-plastic composite pipes are constructed with a steel pipe as the backbone and a thermoplastic polyethylene composite pipe. Steel-plastic composite pipes are typically connected using steel flanges. Directly attaching a steel flange to the polyethylene outer plastic will result in an unstable connection due to the relatively soft polyethylene. Utility Model Content

[0003] In order to improve the connection stability between steel-plastic composite pipes, the present application provides a steel-plastic composite pipe with an engineering plastic flange at its end.

[0004] The present application provides a steel-plastic composite pipe with an engineering plastic flange at the end, which adopts the following technical solution:

[0005] A steel-plastic composite pipe with an engineering plastic flange at the end includes a steel-plastic composite pipe and a flange. The steel-plastic composite pipe includes a perforated steel strip located in the middle and plastic layers located on both sides of the perforated steel strip. The outer plastic layer near the end of the steel-plastic composite pipe is provided with a connecting notch to expose the perforated steel strip. The flange is located on the connecting notch and also includes hot-melt plastic. The hot-melt plastic enters the connecting notch to cover the perforated steel strip and is used to connect the flange to the hot-melt plastic.

[0006] Optionally, a steel plate is provided in the connecting notch, the steel plate is annular and sleeved with a punched steel strip, and after the hot-melt plastic cools, the steel plate is embedded in the hot-melt plastic.

[0007] Optionally, after the connecting notch is opened, the inner plastic layer is turned outward, and after the inner plastic layer is turned outward, an injection groove is formed with the connecting notch, and the hot-melt plastic is located on the injection groove and is used to connect the flange.

[0008] Optionally, the hot-melt plastic goes over the connection gap and covers the end of the outer plastic layer.

[0009] Optionally, the distance between the inner ring of the flange and the punched steel strip is smaller than the distance between the outer ring of the steel plate and the punched steel strip, so that the hot-melt plastic forms a boss connecting the flange between the steel plate and the flange.

[0010] Optionally, a plurality of steel plates are provided, and the steel plates are evenly and spaced apart between the outward-turned plastic layer and the flange.

[0011] Optionally, the steel plate facing away from the flange is flush with the end of the punched steel strip, and the plastic layer is turned outward and affixed to the outer steel strip.

[0012] Optionally, the steel disc is welded to the punched steel strip.

[0013] Optionally, the hot-melt plastic is engineering plastic.

[0014] Optionally, the punched steel strip corresponding to the outward-turned section of the inner plastic layer is cut and separated from the entire punched steel strip.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. The flange is fixed on the punched steel strip of the steel-plastic composite pipe through hot-melt plastic. After the hot-melt plastic cools, the flange is fixed on the punched steel strip. When the steel-plastic composite pipe is connected, the flange is connected with bolts. Because the flange is fixed on the steel-plastic composite pipe, the connection stability between the steel-plastic composite pipes is improved;

[0017] 2. Under the action of the connection notch, it is convenient for hot-melt plastic to fix the steel-plastic composite pipe and the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a steel-plastic composite pipe with an engineering plastic flange at the end according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0020] Explanation of the accompanying symbols: 1. Steel-plastic composite pipe; 11. Punched steel strip; 12. Plastic layer; 2. Flange; 3. Connection notch; 4. Hot-melt plastic; 5. Steel plate; 6. Injection molding groove; 7. Boss. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-2 This application is described in further detail.

[0022] The embodiment of the present application discloses a steel-plastic composite pipe with an engineering plastic flange at the end. Figure 1 and Figure 2The steel-plastic composite pipe with an engineering plastic flange at the end includes a steel-plastic composite pipe 1 and a flange 2. The steel-plastic composite pipe 1 includes a perforated steel belt 11 located in the middle and plastic layers 12 located on both sides of the perforated steel belt 11. The outer plastic layer 12 near the end of the steel-plastic composite pipe 1 is provided with a connecting notch 3 and the perforated steel belt 11 is exposed. The flange 2 is located on the connecting notch 3 and also includes hot-melt plastic 4. The hot-melt plastic 4 enters the connecting notch 3 to cover the perforated steel belt 11 and to connect the flange 2 to the hot-melt plastic 4.

[0023] The flange 2 is fixed on the punched steel strip 11 of the steel-plastic composite pipe 1 through the hot-melt plastic 4. After the hot-melt plastic 4 cools down, the flange 2 is fixed on the punched steel strip 11. When the steel-plastic composite pipe 1 is connected, the flange 2 is connected with bolts. Since the flange 2 is fixed on the steel-plastic composite pipe 1, the connection stability between the steel-plastic composite pipes 1 is improved.

[0024] Reference Figure 1 and Figure 2 In the embodiment of the present application, a steel disc 5 is provided in the connection gap 3. The steel disc 5 is annular and is sleeved on the punched steel belt 11. The plane where the steel disc 5 is located is perpendicular to the axial direction of the steel-plastic composite pipe 1. After the hot-melt plastic 4 cools, the steel disc 5 is embedded in the hot-melt plastic 4; the disc is sleeved on the steel-plastic composite pipe 1, and then the disc is fixed on the punched steel belt 11, and then the hot-melt plastic 4 is poured into the connection gap 3. When the hot-melt plastic 4 is cooled and formed, the disc is embedded in the punched steel belt 11. Under the action of the disc, the stability of the connection port of the steel-plastic composite pipe 1 is improved, thereby improving the connection stability of the steel-plastic composite pipe 1.

[0025] Reference Figure 1 and Figure 2 In the embodiment of the present application, the steel plate 5 is welded to the punched steel strip 11 .

[0026] Reference Figure 1 and Figure 2 In the embodiment of the present application, in order to facilitate the molding of the hot-melt plastic 4 in the connecting notch 3, after the connecting notch 3 is opened, the inner plastic layer 12 is turned outward. After the inner plastic layer 12 is turned outward, an injection groove 6 is formed with the connecting notch 3. The hot-melt plastic 4 is located on the injection groove 6 and is used to connect the flange 2; after the inner plastic layer 12 is turned outward, an injection groove 6 is formed with the connecting notch 3, and then the hot-melt plastic 4 is injected into the injection groove 6, thereby facilitating the molding of the hot-melt plastic 4, and then facilitating the fixed connection between the flange 2 and the hot-melt plastic 4.

[0027] Reference Figure 1 and Figure 2When the connection gap 3 is opened, the perforated steel strip 11 is exposed. After the perforated steel strip 11 is exposed, it is easily corroded by corrosive liquids. Therefore, in the embodiment of the present application, the hot-melt plastic 4 passes over the connection gap 3 and covers the end of the outer plastic layer 12; the hot-melt plastic 4 passes over the connection gap 3 and reaches the outer plastic layer 12, thereby covering the perforated steel strip 11 in the hot-melt tube plastic, thereby extending the service life of the perforated steel strip 11.

[0028] Reference Figure 1 and Figure 2 In order to further improve the connection stability between the flange 2 and the hot-melt plastic 4, the distance between the inner ring of the flange 2 and the punching steel strip 11 is smaller than the distance between the outer ring of the steel plate 5 and the punching steel strip 11, so that the hot-melt plastic 4 forms a boss 7 connecting the flange 2 between the steel plate 5 and the flange 2; the flange 2 is located inside the boss 7, so that the flange 2 and the hot-melt plastic 4 have two surfaces in contact, further improving the connection stability between the flange 2 and the hot-melt plastic 4; at the same time, under the action of the boss 7, when the steel-plastic composite pipe 1 is connected, the flange 2 is pulled by the bolts, and the boss 7 has an obstructive effect on the flange 2, thereby improving the connection stability of the flange 2 to the steel-plastic composite pipe 1.

[0029] Reference Figure 1 and Figure 2 In the embodiment of the present application, a plurality of steel discs 5 are provided, and the steel discs 5 are evenly and spaced apart between the outer plastic layer 12 and the flange 2. The plurality of steel discs 5 form a skeleton in the hot melt plastic 4, thereby improving the stability of the hot melt plastic 4 after molding.

[0030] Reference Figure 1 and Figure 2 In the embodiment of the present application, the steel plate 5 facing away from the flange plate 2 is flush with the end of the punched steel strip 11, and the outward-turned plastic layer 12 is attached to the outer steel strip; the punched steel strip 11 corresponding to the outward-turned section of the inner plastic layer 12 is cut and separated from the entire punched steel strip 11.

[0031] Reference Figure 1 and Figure 2 Furthermore, the hot melt plastic 4 is engineering plastic.

[0032] The implementation principle of the steel-plastic composite pipe with an engineering plastic flange at the end of the embodiment of the present application is as follows:

[0033] The flange 2 is fixed on the punched steel strip 11 of the steel-plastic composite pipe 1 through the hot-melt plastic 4. After the hot-melt plastic 4 cools down, the flange 2 is fixed on the punched steel strip 11. When the steel-plastic composite pipe 1 is connected, the flange 2 is connected with bolts. Since the flange 2 is fixed on the steel-plastic composite pipe 1, the connection stability between the steel-plastic composite pipes 1 is improved.

[0034] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A steel-plastic composite pipe with an engineering plastic flange at the end, characterized by: The invention comprises a steel-plastic composite pipe (1) and a flange (2), wherein the steel-plastic composite pipe (1) comprises a punched steel strip (11) located in the middle and plastic layers (12) located on both sides of the punched steel strip (11), the outer plastic layer (12) near the end of the steel-plastic composite pipe (1) is provided with a connecting notch (3) so that the punched steel strip (11) is exposed, the flange (2) is located on the connecting notch (3), and further comprises hot-melt plastic (4), the hot-melt plastic (4) enters the connecting notch (3) to cover the punched steel strip (11), and is used to connect the flange (2) to the hot-melt plastic (4).

2. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 1, characterized in that: A steel plate (5) is provided in the connection gap (3), the steel plate (5) is annular and sleeved with a punched steel belt (11), and after the hot-melt plastic (4) cools, the steel plate (5) is embedded in the hot-melt plastic (4).

3. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 2, characterized in that: After the connecting notch (3) is opened, the inner plastic layer (12) is turned outward, and after the inner plastic layer (12) is turned outward, an injection groove (6) is formed with the connecting notch (3), and the hot melt plastic (4) is located on the injection groove (6) and is used to connect the flange (2).

4. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 1, characterized in that: The hot-melt plastic (4) passes over the connection notch (3) and covers the end of the outer plastic layer (12).

5. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 2, characterized in that: The distance between the inner ring of the flange (2) and the punched steel strip (11) is smaller than the distance between the outer ring of the steel plate (5) and the punched steel strip (11), so that the hot melt plastic (4) forms a boss (7) connecting the flange (2) between the steel plate (5) and the flange (2).

6. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 3, characterized in that: A plurality of steel plates (5) are provided, and the steel plates (5) are evenly and spaced apart between the outward-turned plastic layer (12) and the flange (2).

7. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 6, characterized in that: The steel plate (5) facing away from the flange (2) is flush with the end of the punched steel strip (11), and the plastic layer (12) is turned outward and affixed to the outer steel strip.

8. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 2, characterized in that: The steel plate (5) is welded to the punched steel strip (11).

9. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 1, characterized in that: The hot melt plastic (4) is engineering plastic.

10. The steel-plastic composite pipe with an engineering plastic flange at the end according to claim 3, characterized in that: The punched steel strip (11) corresponding to the outward-turned section of the inner plastic layer (12) is cut and separated from the entire punched steel strip (11).

Images