A type of anti-detachment plastic-lined pipe

Abstract

This utility model belongs to the technical field of plastic-lined pipes, specifically relating to an anti-detachment plastic-lined pipe, comprising a metal pipe and a plastic pipe. Four protrusions are evenly fixedly connected to the sidewall of the plastic pipe, and four grooves are evenly formed on the inner wall of the metal pipe, extending through both ends of the metal pipe. A rubber extrusion assembly is provided near both ends of the sidewall of each protrusion. The rubber extrusion assembly includes a screw threaded to the end faces of both protrusions. A cavity is formed inside each protrusion near both ends for storing rubber. One end of the screw extends into the cavity and is rotatably connected to a push plate. Multiple rubber outlet holes are formed on the sidewall of the cavity away from the push plate. This utility model enhances the connection stability between the plastic pipe and the metal pipe, improving durability.

Description

Technical Field

[0001] This utility model belongs to the field of plastic-lined pipe technology, specifically relating to a plastic-lined pipe that prevents detachment. Background Technology

[0002] Plastic-lined pipes are composite pipes made by cold-drawing or rotational molding, with ordinary carbon steel pipes as the base material and thermoplastic engineering plastics with excellent chemical stability as the inner lining.

[0003] Conventional connection methods include threaded connections, flange connections, grooved connections, socket connections, and welded connections, as well as special snap ring connections, crimped connections, thermofusion connections, and electrofusion connections.

[0004] In the long term, existing plastic-lined pipes are easily affected by various factors such as transportation bumps, water hammer effect, and ground vibration, which can cause the plastic pipe to separate from the metal pipe, resulting in problems such as rotation or lateral displacement, leading to poor stability and sealing between the two. Utility Model Content

[0005] The purpose of this invention is to provide a non-detachable plastic-lined pipe that can enhance the connection stability between the plastic pipe and the metal pipe and improve its durability.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A type of anti-detachment plastic-lined pipe includes a metal pipe and a plastic pipe. The sidewall of the plastic pipe is uniformly fixedly connected with four protrusions. The inner wall of the metal pipe is uniformly provided with four grooves, which penetrate through both ends of the metal pipe. The sidewalls of the protrusions are provided with rubber extrusion components near both ends.

[0008] Furthermore, the adhesive extrusion assembly includes a screw threaded to both ends of the protrusion. The protrusion has a cavity near both ends for storing adhesive. One end of the screw extends into the cavity and is rotatably connected to a push plate. Multiple adhesive outlet holes are provided on the sidewall of the cavity away from the push plate.

[0009] Furthermore, each of the dispensing holes is fixedly connected to a sealing membrane.

[0010] Furthermore, the sidewall of the protrusion is provided with a groove at the glue outlet.

[0011] Furthermore, multiple toothed blocks are fixedly connected to the sidewall of the slot, and the multiple toothed blocks form a sawtooth shape.

[0012] Furthermore, the two end faces of the protrusion are provided with storage grooves, the other end of the screw is located in the storage groove, and one end of the screw located in the storage groove is fixedly connected to an internal hexagonal sleeve.

[0013] Furthermore, when the multiple plastic tubes are docked, positioning rods are inserted into two adjacent storage slots on the same axis.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This utility model provides an anti-detachment plastic-lined pipe that, through the cooperation of a metal pipe, a plastic pipe, protrusions, grooves, and a colloid extrusion assembly, uses a connection method with protrusions and grooves to effectively prevent axial rotation of the plastic pipe. The positioning rod can prevent axial displacement of the plastic pipe, and the colloid extrusion assembly can strengthen the bond between the plastic pipe and the metal pipe, extending its service life. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the metal tube of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the plastic tube of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the plastic pipe of this utility model in the connected state;

[0021] Figure 6 This is a utility model Figure 2 Enlarged view of point A in the image;

[0022] Figure 7 This is a utility model Figure 5 Enlarged view of point B in the image.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Metal tube; 2. Plastic tube; 3. Protrusion; 4. Groove; 5. Screw; 6. Cavity; 7. Push plate; 8. Dispensing hole; 9. Sealing membrane; 10. Groove; 11. Tooth block; 12. Storage groove; 13. Positioning rod. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figures 1-7As shown, an anti-detachment plastic-lined pipe includes a metal pipe 1 and a plastic pipe 2. Four protrusions 3 are evenly fixedly connected to the side wall of the plastic pipe 2. Four grooves 4 are evenly opened on the inner wall of the metal pipe 1. The grooves 4 pass through both ends of the metal pipe 1. Rubber extrusion components are provided on the side wall of the protrusions 3 near both ends.

[0027] like Figure 2 , Figure 6 and Figure 7 As shown, the adhesive extrusion assembly includes a screw 5 threaded to both ends of the protrusion 3. A cavity 6 is provided inside the protrusion 3 near both ends. The cavity 6 is used to store adhesive. One end of the screw 5 extends into the cavity 6 and is rotatably connected to a push plate 7. Multiple adhesive outlet holes 8 are provided on the side wall of the cavity 6 away from the push plate 7.

[0028] The screw 5 is threadedly connected to the protrusion 3. Rotating the screw 5 pushes the push plate 7 to move within the cavity 6, precisely squeezing the adhesive (such as high-strength adhesive) stored within the cavity 6. This allows the adhesive to be evenly extruded from the adhesive outlet 8 into the gap between the protrusion 3 and the groove 4. This design allows for control of the adhesive dispensing amount according to actual needs, ensuring that the adhesive fully fills the gaps and bonds the plastic tube 2 and the metal tube 1 together, significantly improving the connection's strength.

[0029] In addition, when the pipe undergoes slight displacement due to temperature changes, vibration, etc., the extruded adhesive can dynamically compensate through its own elasticity, maintaining a tight fit between the plastic pipe 2 and the metal pipe 1, and avoiding the problem of loosening under long-term stress caused by traditional fixing methods.

[0030] like Figure 7 As shown, sealing membranes 9 are fixedly connected to the side walls of the dispensing hole 8. The sealing membranes 9 are made of PP or PE material, and their performance is the same as that of plastic wrap. The sealing membranes 9 can isolate the adhesive in the cavity 6 from the outside world before the pipe is installed or before the adhesive is extruded, preventing the adhesive from curing or deteriorating prematurely due to contact with air, moisture or impurities.

[0031] like Figure 7 As shown, a groove 10 is provided on the side wall of the protrusion 3 at the position of the glue outlet 8. The groove 10 provides a flow channel and a space for the extruded glue, allowing the glue to spread evenly along the groove 10 to the contact surface between the protrusion 3 and the groove 4, covering a larger area, enhancing the overall bonding and stability, and avoiding loosening caused by insufficient local bonding.

[0032] like Figure 7 As shown, multiple toothed blocks 11 are fixedly connected to the side wall of the slot 10, and the multiple toothed blocks 11 form a sawtooth shape.

[0033] Specifically, the gaps between the toothed blocks 11 can accommodate some of the adhesive. After the adhesive cures, it forms an "anchoring" structure with the toothed blocks 11, making the adhesive bond more firmly with the protrusions 3 and grooves 4. This prevents the adhesive from falling off due to vibration and friction during long-term use and maintains the durability of the bonding effect.

[0034] like Figure 6 As shown, the two end faces of the protrusion 3 are provided with receiving grooves 12, and the other end of the screw 5 is located in the receiving groove 12. One end of the screw 5 located in the receiving groove 12 is fixedly connected to an internal hexagonal sleeve. The receiving groove 12 hides the end of the screw 5 and the internal hexagonal sleeve therein, preventing the end of the screw 5 from rotating accidentally due to external forces such as collision and friction after the pipe is installed.

[0035] like Figure 5 As shown, when multiple plastic tubes 2 are in a docked state, positioning rods 13 are inserted into two adjacent storage slots 12 on the same axis.

[0036] Among them, the positioning rod 13 is inserted into the receiving groove 12 of two adjacent plastic pipes 2 at the same time to form a rigid connection, which directly restricts the axial displacement between adjacent plastic pipes 2, and avoids pipe disconnection caused by water hammer effect, vibration, etc., which is especially suitable for ensuring the overall stability of long-distance pipeline laying.

[0037] In addition, by connecting multiple plastic pipes 2 in series with positioning rod 13, the deformation resistance of the pipeline system is improved, the stress at the connection of individual pipes is distributed, local stress concentration is reduced, and the service life of the entire pipeline system is extended.

[0038] The working principle of this utility model is as follows: When installing the plastic tube 2 and the metal tube 1, align the protrusion 3 on the plastic tube 2 with the groove 4 in the groove 4, and push the plastic tube 2 into the metal tube 1 so that the end faces of the metal tube 1 and the plastic tube 2 correspond and are in a flush state. Then, rotate the screw 5 with an Allen wrench or electric wrench so that the screw 5 drives the push plate 7 to squeeze the adhesive. The adhesive is squeezed by the pressure and breaks through the sealing membrane 9 and is squeezed out from the adhesive outlet 8, filling the space between the groove 10 and the inner wall of the metal tube 1. At the same time, the sawtooth structure formed by the toothed block 11 can strengthen the bonding stability between the adhesive and the metal tube 1, avoid problems such as axial displacement of the plastic tube 2, and improve the durability of use.

[0039] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An anti -migration lined plastic pipe, characterized by: It includes a metal tube (1) and a plastic tube (2). The side wall of the plastic tube (2) is uniformly fixed with four protrusions (3). The inner wall of the metal tube (1) is uniformly provided with four grooves (4). The grooves (4) penetrate through both ends of the metal tube (1). The side wall of the protrusions (3) is provided with rubber extrusion components near both ends.

2. The anti -sloughing, lined pipe of claim 1, wherein: The adhesive extrusion assembly includes a screw (5) threaded to both ends of the protrusion (3). The protrusion (3) has a cavity (6) near both ends for storing adhesive. One end of the screw (5) extends into the cavity (6) and is rotatably connected to a push plate (7). Multiple adhesive outlet holes (8) are provided on the side wall of the cavity (6) away from the push plate (7).

3. The anti -sloughing, lined pipe of claim 2, wherein: Each of the dispensing holes (8) has a sealing membrane (9) fixedly connected to its sidewall.

4. The anti -migration, lined pipe of claim 2, wherein: The side wall of the protrusion (3) has a groove (10) at the position of the glue outlet (8).

5. The anti -migration, lined pipe of claim 4, wherein: The slot (10) has multiple toothed blocks (11) fixedly connected to its sidewall, and the multiple toothed blocks (11) form a sawtooth shape.

6. The anti -migration, lined pipe of claim 2, wherein: The two ends of the protrusion (3) are provided with storage grooves (12), and the other end of the screw (5) is located in the storage groove (12). One end of the screw (5) is fixedly connected to an internal hexagonal sleeve inside the storage groove (12).

7. The anti -migration, lined pipe of claim 6, wherein: When the multiple plastic tubes (2) are in the docking state, positioning rods (13) are inserted into two adjacent storage slots (12) on the same axis.

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