Anti-stripping permeation steel-plastic composite pipe

Abstract

The utility model discloses an anti-stripping permeation steel-plastic composite pipe. Relates to the technical field of composite pipe body equipment and comprises a composite pipe body, the composite pipe body comprises a steel pipe layer and an inner plastic pipe located on the inner side wall of the steel pipe layer, connecting flanges are arranged at the two ends of the steel pipe layer, and connecting assemblies attached to the inner side wall of the inner plastic pipe are arranged on the sides, away from the composite pipe body, of the connecting flanges. The connecting flanges are arranged at the two ends of the steel pipe layer, the connecting assemblies attached to the inner side walls of the inner plastic pipes are arranged on the sides, away from the composite pipe bodies, of the connecting flanges, the connecting assemblies support the inner plastic pipes of the two adjacent spliced composite pipe bodies, and the bonding positions of the inner plastic pipes of the composite pipe bodies and the steel pipe layer are prevented from being corroded. The inner plastic pipe and the steel pipe layer are completely stripped to form a gap, so that the corrosion speed of gas or liquid in the pipe to the steel pipe layer is accelerated, and the damage speed of the steel-plastic composite pipe is reduced.

Description

Technical Field

[0001] This application relates to the field of composite pipe equipment technology, and in particular to a peel-resistant permeable steel-plastic composite pipe. Background Technology

[0002] Steel-plastic composite pipe is a new type of pipe material made by combining steel pipe and plastic pipe through a specific process. It combines the mechanical strength of steel pipe and the corrosion resistance of plastic pipe. This pipe material has been widely used in many fields such as construction, water supply, drainage, chemical industry, shipbuilding, and power, and has significant advantages and characteristics.

[0003] Currently, steel-plastic composite pipes are spliced ​​together to form pipelines, which are then buried deep underground to transport liquids or gases.

[0004] Regarding the aforementioned technologies, the inventors believe that when two sections of steel-plastic composite pipe are directly spliced ​​together to transport gas or liquid, the gas or liquid will seep into the splice of the two sections of steel-plastic composite pipe, corroding the adhesive between the steel pipe and the plastic pipe, causing the steel pipe to separate from the plastic pipe, thereby accelerating the corrosion of the steel pipe and damaging the steel-plastic composite pipe. Utility Model Content

[0005] The purpose of this application is to provide a non-peeling and permeation-resistant steel-plastic composite pipe to improve the problem that when two sections of steel-plastic composite pipe are directly spliced ​​together for transporting gas or liquid, the gas or liquid can seep into the splice of the two sections of steel-plastic composite pipe, corrode the adhesive between the steel pipe and the plastic pipe, cause the steel pipe to separate from the plastic pipe, and thus accelerate the corrosion of the steel pipe and damage the steel-plastic composite pipe.

[0006] This application provides a peel-resistant and permeable steel-plastic composite pipe, which adopts the following technical solution:

[0007] A peel-resistant and permeable steel-plastic composite pipe includes a composite pipe body, which includes a steel pipe layer and an inner plastic pipe located on the inner wall of the steel pipe layer. A connecting flange is provided at one end of the steel pipe layer near the adjacent composite pipe body, and a connecting component that fits against the inner wall of the inner plastic pipe is provided on the side of the connecting flange away from the composite pipe body.

[0008] By adopting the above technical solution, connecting flanges are set at both ends of the steel pipe layer, and a connecting component that fits against the inner wall of the inner plastic pipe is set on the side of the connecting flange away from the composite pipe body. The connecting component supports the inner plastic pipe of the two adjacent spliced ​​composite pipe bodies, preventing the inner plastic pipe of the composite pipe body from completely peeling off from the steel pipe layer and creating gaps, thereby accelerating the corrosion rate of the steel pipe layer and reducing the damage rate of the steel-plastic composite pipe.

[0009] Optionally, the connecting assembly includes a mounting seat that abuts against the side wall of the connecting flange. The mounting seat has connecting sleeves that fit against the inner side wall of the inner plastic tube on both sides near the steel pipe layer. The mounting seat has a communicating groove that communicates with the inner side wall of the connecting sleeves on both sides.

[0010] By adopting the above technical solution, connecting sleeves are set on both sides of the mounting base near the steel pipe layer. The connecting sleeves are inserted into the inner plastic pipe and fit against the inner wall of the inner plastic pipe to support the inner plastic pipe. This reduces the possibility of the inner plastic pipe separating from the steel pipe layer, allowing the gas or liquid inside the pipe to directly contact the steel pipe layer and accelerate the corrosion rate of the steel pipe layer. A connecting groove is opened in the mounting base to communicate with the connecting sleeves, so that the gas or liquid transported in the steel-plastic composite pipe can enter the next section of the steel-plastic composite pipe through the connecting assembly.

[0011] Optionally, a positioning hole is provided at the edge of the connecting flange, and a positioning rod connected to the mounting base is inserted into the positioning hole.

[0012] By adopting the above technical solution, a positioning hole is opened at the edge of the connecting flange, and a positioning rod connected to the mounting seat is inserted into the positioning hole to connect and fix the connecting flange to the mounting seat, so as to prevent the mounting seat from separating from the composite pipe body and causing the gas or liquid transported in the pipe to leak.

[0013] Optionally, the mounting base has an annular groove on the side near the connecting flange, and a sealing gasket is provided in the annular groove.

[0014] By adopting the above technical solution, an annular groove is opened on the side of the mounting base near the connecting flange, and a sealing gasket is placed in the annular groove. When the connecting flange is fixed to the mounting base, the sealing gasket abuts against the ends of the steel pipe layer and the inner plastic pipe, preventing the external medium of the steel-plastic composite pipe from corroding the bonding joint of the steel pipe layer and the inner plastic pipe.

[0015] Optionally, the outer wall of the connecting sleeve is provided with a sealing sleeve that abuts against the inner wall of the inner plastic tube.

[0016] By adopting the above technical solution, a sealing sleeve is set on the outer wall of the connecting sleeve. After the connecting sleeve is inserted into the inner plastic tube, the sealing sleeve is tightly fitted with the inner wall of the inner plastic tube, preventing gas or liquid in the tube from damaging the bonding joint between the inner plastic tube and the steel pipe layer through the gap between the connecting sleeve and the inner plastic tube.

[0017] Optionally, steel wires are pre-embedded in the inner plastic tube, and the steel wires are arranged in a staggered manner around the inner plastic tube. The plastic in the inner plastic tube is made of high-density polyethylene.

[0018] By adopting the above technical solution, the inner plastic tube is made of interlaced steel wires and high-density polyethylene. The steel wires pre-installed inside the inner plastic tube provide a certain support, reducing the possibility of cracking and leakage in the inner plastic tube after long-term use of the steel-plastic composite pipe.

[0019] Optionally, the inner wall of the connecting sleeve and the inner wall of the connecting groove are provided with a plastic lining layer.

[0020] By adopting the above technical solution, a plastic lining layer is provided on the inner side wall of the connecting groove between the connecting sleeve and the mounting base. The plastic lining layer separates the connecting sleeve and the mounting base from the gas or liquid flowing inside the pipe, thereby reducing the damage caused by the gas or liquid flowing inside the pipe to the mounting base and the connecting sleeve.

[0021] Optionally, a protrusion is provided around the outer wall of the steel pipe layer, and a fixing hole is provided at the edge of the protrusion. The mounting base and the connecting flange are provided with a fixing hole that communicates with the fixing hole. A fixing rod is inserted into the fixing hole and the fixing hole.

[0022] By adopting the above technical solution, a fixing hole 1 is opened at the edge of the protrusion, and a fixing hole 2 communicating with the fixing hole 1 is opened in the mounting base and connecting flange. The fixing rod is inserted into the fixing hole 1 and the fixing hole 2 to further connect and fix the two sections of composite pipe body spliced ​​by the connecting component. This prevents misalignment at the connection of the composite pipe body when the steel-plastic composite pipe is buried underground, which would damage the steel-plastic composite pipe and cause the gas or liquid transported in the pipe to leak out.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Connecting sleeves are installed on both sides of the mounting base near the steel pipe layer. The connecting sleeves are inserted into the inner plastic pipe and fit against the inner wall of the inner plastic pipe to support the inner plastic pipe. This reduces the possibility of the inner plastic pipe separating from the steel pipe layer, allowing the gas or liquid inside the pipe to directly contact the steel pipe layer and accelerate the corrosion rate of the steel pipe layer. A connecting groove is opened in the mounting base to communicate with the connecting sleeves, so that the gas or liquid transported in the steel-plastic composite pipe can enter the next section of the steel-plastic composite pipe through the connecting assembly.

[0025] 2. An annular groove is made on the side of the mounting base near the connecting flange, and a sealing gasket is placed in the annular groove. When the connecting flange is fixed to the mounting base, the sealing gasket abuts against the ends of the steel pipe layer and the inner plastic pipe to prevent the medium outside the steel-plastic composite pipe from corroding the bonding joint between the steel pipe layer and the inner plastic pipe. A sealing sleeve is set on the outer wall of the connecting sleeve. After the connecting sleeve is inserted into the inner plastic pipe, the sealing sleeve fits tightly against the inner wall of the inner plastic pipe to prevent gas or liquid inside the pipe from damaging the bonding joint between the inner plastic pipe and the steel pipe layer through the gap between the connecting sleeve and the inner plastic pipe.

[0026] 3. A fixing hole one is made at the edge of the protrusion, and a fixing hole two communicating with fixing hole one is made in the mounting base and connecting flange. The fixing rod is inserted into fixing hole one and fixing hole two to further connect and fix the two sections of composite pipe body spliced ​​by the connecting component, so as to prevent misalignment at the connection of the composite pipe body when the steel-plastic composite pipe is buried underground, which would damage the steel-plastic composite pipe and cause the gas or liquid transported in the pipe to leak out. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an anti-peeling and permeable steel-plastic composite pipe.

[0028] Figure 2 This is a partial schematic diagram of the connection components of the steel-plastic composite pipe in the embodiment;

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0030] In the diagram, 1. Composite pipe body; 11. Steel pipe layer; 12. Inner plastic pipe; 13. Connecting flange; 131. Positioning hole; 14. Protrusion; 141. Fixing hole one; 2. Connecting assembly; 21. Mounting base; 211. Connecting groove; 212. Positioning rod; 213. Annular groove; 214. Fixing hole two; 22. Connecting sleeve; 23. Sealing gasket; 24. Sealing sleeve; 25. Plastic lining layer; 26. Fixing rod. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0032] A type of anti-peeling permeable steel-plastic composite pipe, as described in the reference Figure 1 and Figure 2The system includes a composite pipe body 1, which consists of a steel pipe layer 11 and an inner plastic pipe 12. The inner plastic pipe 12 is bonded and fixed to the steel pipe layer 11 with a special hot melt adhesive. The inner plastic pipe 12 is made of interlaced steel wires (not shown in the figure) and high-density polyethylene, which provide some support for the inner plastic pipe 12 and reduce the possibility of cracking and leakage in the inner plastic pipe 12 after long-term use. A connecting flange 13 is welded to one end of the steel pipe layer 11 near the adjacent composite pipe body 1. On the side of the connecting flange 13 away from the composite pipe body 1, a part is provided that fits against the inner wall of the inner plastic pipe 12. The connecting component 2 consists of a mounting base 21 and connecting sleeves 22 welded to both sides of the mounting base 21 near the steel pipe layer 11. The connecting sleeves 22 are inserted into the inner plastic pipe 12 and fit against the inner wall of the inner plastic pipe 12, supporting the inner plastic pipe 12 and reducing the possibility of the inner plastic pipe 12 separating from the steel pipe layer 11, allowing the gas or liquid inside the pipe to directly contact the steel pipe layer 11 and accelerate the corrosion rate of the steel pipe layer 11. A connecting groove 211 is provided in the mounting base 21 to communicate with the connecting sleeves 22, so that the gas or liquid transported in the steel-plastic composite pipe can enter the next section of the steel-plastic composite pipe through the connecting component 2.

[0033] Reference Figure 2 and Figure 3 A positioning hole 131 is made in the position of the connecting flange 13 surrounding the steel pipe layer 11. Positioning rods 212 corresponding to the positions of the positioning holes 131 are welded on both sides of the mounting base 21. The ends of the positioning rods 212 are threaded. After the positioning rods 212 are inserted into the positioning holes 131, they are connected to the positioning rods 212 with nuts, thus connecting and fixing the connecting flange 13 to the mounting base 21. An annular groove 213 is made on the side of the mounting base 21 near the connecting flange 13. A sealing gasket 23 is installed in the annular groove 213. The sealing gasket 23 is a corrosion-resistant rubber gasket. It is connected and fixed to the connecting flange 13 through the mounting base 21, so that the sealing gasket 23 abuts against the ends of the steel pipe layer 11 and the inner plastic pipe 12, preventing the medium outside the steel-plastic composite pipe from corroding the bonding joint of the steel pipe layer 11 and the inner plastic pipe 12.

[0034] Reference Figure 2 and Figure 3 A sealing sleeve 24 is provided on the outer wall of the connecting sleeve 22. The sealing sleeve 24 is a corrosion-resistant rubber sleeve. After the connecting sleeve 22 is inserted into the inner plastic tube 12, the sealing sleeve 24 fits tightly against the inner wall of the inner plastic tube 12 to prevent gas or liquid in the tube from damaging the bonding joint between the inner plastic tube 12 and the steel pipe layer 11 through the gap between the connecting sleeve 22 and the inner plastic tube 12. A plastic lining layer 25 composed of high-density polyethylene is sprayed on the inner wall of the connecting groove 211 of the mounting base 21 and the connecting sleeve 22 to reduce the damage caused by gas or liquid flowing in the tube to the mounting base 21 and the connecting sleeve 22.

[0035] Reference Figure 1 and Figure 2 A ring-shaped metal protrusion 14 is welded to the outer wall of the steel pipe layer 11. A fixing hole 141 is opened at the edge of the protrusion 14. A fixing hole 214 communicating with the fixing hole 141 is opened on the mounting base 21 and the connecting flange 13. A metal fixing rod 26 is inserted into the fixing hole 141 and the fixing hole 214. The two ends of the fixing rod 26 away from the protrusion 14 are connected to the nuts by threads. The two sections of composite pipe 1 spliced ​​by the connecting component 2 are further connected and fixed to prevent misalignment at the connection of the composite pipe 1 when the steel-plastic composite pipe is buried underground, which would damage the steel-plastic composite pipe.

[0036] The implementation principle of this application embodiment is as follows:

[0037] Insert the connecting sleeve 22 of the mounting base 21 into the inner plastic tube 12 of the composite pipe body 1, making it fit against the inner wall of the inner plastic tube 12. This supports the inner plastic tube 12, reducing the possibility of separation between the inner plastic tube 12 and the steel pipe layer 11, allowing gas or liquid inside the pipe to directly contact the steel pipe layer 11 and accelerate its corrosion. Then, insert the connecting sleeve 22 on the other side of the mounting base 21 into the inner wall of the next section of the composite pipe body 1's inner plastic tube 12, so that the connecting flange 13 of the two sections of the composite pipe body 1 abuts against the mounting base 21. Insert the metal positioning rods 212 on both sides of the mounting base 21 into the positioning holes 131 of the connecting flange 13 and fix them with nuts. This connects and fixes the connecting flange 13 to the mounting base 21, preventing the two sections of the steel-plastic composite pipe from separating from the mounting base 21, thus ensuring the mounting base 21 remains in place. The sealing gasket 23 installed in the annular groove 213 of the steel pipe abuts against the connecting flange 13 to prevent the medium outside the steel-plastic composite pipe from corroding the bonding joint between the steel pipe layer 11 and the inner plastic pipe 12. A fixing hole 141 is opened at the edge of the metal protrusion 14 on the outer wall of the steel pipe layer 11. A fixing hole 214 communicating with the fixing hole 141 is opened on the mounting seat 21 and the connecting flange 13. The metal fixing rod 26 is inserted into the fixing hole 141 and the fixing hole 214. The two ends of the fixing rod 26 away from the protrusion 14 are connected to the nuts by threads. The two sections of composite pipe 1 spliced ​​by the connecting assembly 2 are further connected and fixed to prevent misalignment at the connection of the composite pipe 1 when the steel-plastic composite pipe is buried underground, which would damage the steel-plastic composite pipe. To prevent corrosion at the bonding point between the inner plastic tube 12 and the steel pipe layer 11 of the composite pipe body 1, and to prevent the inner plastic tube 12 and the steel pipe layer 11 from completely separating and creating gaps, thereby accelerating the corrosion rate of the steel pipe layer 11 by the gas or liquid inside the pipe and reducing the rate of damage to the steel-plastic composite pipe.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A peel resistant permeation steel plastic composite pipe comprising a composite pipe body (1), characterized in that: The composite pipe body (1) comprises a steel pipe layer (11) and an inner plastic pipe (12) located at the inner side wall of the steel pipe layer (11), and the steel pipe layer (11) is provided with a connecting flange (13) at one end close to an adjacent composite pipe body (1), and the connecting flange (13) is provided with a connecting assembly (2) fitted with the inner side wall of the inner plastic pipe (12) at the side away from the composite pipe body (1).

2. The anti-stripping permeation steel-plastic composite pipe according to claim 1, characterized in that: The connecting assembly (2) comprises a mounting seat (21) abutting the side wall of the connecting flange (13), and the mounting seat (21) is provided with a connecting sleeve (22) fitted with the inner side wall of the inner plastic pipe (12) at both sides close to the steel pipe layer (11), and the mounting seat (21) is provided with a communication groove (211) communicated with the inner side wall of the connecting sleeve (22) at both sides.

3. The anti-stripping permeation steel-plastic composite pipe according to claim 2, characterized in that: The connecting flange (13) is provided with a positioning hole (131) at the edge position, and the positioning hole (131) is provided with a positioning rod (212) connected with the mounting seat (21).

4. The anti-stripping permeation steel-plastic composite pipe according to claim 3, characterized in that: The mounting seat (21) is provided with an annular groove (213) at the side close to the connecting flange (13), and the annular groove (213) is provided with a sealing washer (23).

5. The anti-stripping permeation steel-plastic composite pipe according to claim 2, characterized in that: The connecting sleeve (22) is provided with a sealing sleeve (24) abutting the inner side wall of the inner plastic pipe (12) at the outer side wall.

6. The anti-stripping permeation steel-plastic composite pipe according to claim 5, characterized in that: The inner plastic pipe (12) is pre-buried with a steel wire, the steel wire is arranged in the inner plastic pipe (12) in a staggered manner, and the plastic in the inner plastic pipe (12) is made of high-density polyethylene.

7. The anti-stripping permeation steel-plastic composite pipe according to claim 2, characterized in that: The inner side wall of the connecting sleeve (22) and the inner side wall of the communication groove (211) are jointly provided with a plastic lining layer (25).

8. The anti-stripping permeation steel-plastic composite pipe according to claim 2, characterized in that: The outer side wall of the steel pipe layer (11) is provided with a protruding piece (14), the protruding piece (14) is provided with a first fixing hole (141) at the edge position, the mounting seat (21) and the connecting flange (13) are provided with a second fixing hole (214) communicated with the first fixing hole (141), and the first fixing hole (141) and the second fixing hole (214) are provided with a fixing rod (26).

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