Polyethylene pipe hot melt lining pipe device

Abstract

The utility model relates to polyethylene tubular product hot melt connecting device technical field, specifically disclose polyethylene tubular product hot melt inner lining pipe device, including first connecting pipe, second connecting pipe and inner lining pipe body, the outer wall fixed connection of inner lining pipe body has support ring, the outer wall fixed connection of support ring has clamping pipe, the both ends of clamping pipe outer wall all are provided as the inclined plane that goes inwards, the outer wall of first connecting pipe and second connecting pipe is close to the one end of clamping pipe and all is fixedly connected with limit ring, the one end close to clamping pipe of limit ring is provided as the inclined plane that goes outward, the outer wall of first connecting pipe and second connecting pipe all has the nut of being located the outside of limit ring, two the nut all are with clamping pipe screw connection, through the double effect of hot melt connection and inclined plane screw thread mechanical pressure, the sealing property and tensile strength of pipeline interface have been enhanced significantly, have improved construction security and pipeline durability simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of polyethylene pipe hot-melt connection device, and specifically discloses a polyethylene pipe hot-melt inner lining device. Background Technology

[0002] Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. It possesses excellent low-temperature resistance, good chemical stability, and resistance to most acids and alkalis. It is insoluble in common solvents at room temperature, has low water absorption, and excellent electrical insulation. PE can be processed using blow molding, extrusion, and injection molding methods and is widely used in the manufacture of films, hollow products, fibers, and daily necessities. PE, chemically known as polyethylene, is widely used in water supply and drainage manufacturing due to its high strength, high temperature resistance, corrosion resistance, non-toxicity, and wear resistance. Because it does not rust, it is an ideal replacement for ordinary iron water supply pipes.

[0003] Chinese patent CN210920506U discloses a polyethylene pipe hot-melt lining device, comprising: a first connecting pipe, a second connecting pipe, and an inner lining pipe. A support ring is provided on the outer wall of the inner lining pipe, and a clamping pipe is provided on the side of the support ring away from the inner lining pipe. The inner lining pipe, support ring, and clamping pipe are an integral structure. The clamping pipe, support ring, and inner lining pipe together form a connecting groove. The first and second connecting pipes are respectively hot-melt connected to both sides of the support ring through the connecting groove. A flame-retardant layer is provided on the outer side of the connecting groove, and a rust-proof layer is provided on the inner wall of the inner lining pipe. This invention connects the first and second connecting pipes through the connecting groove and fixes them to the connecting groove through hot melting. Furthermore, several auxiliary connecting grooves are provided on the connecting groove to facilitate the flow of the hot-melt block. The flame-retardant layer and the rust-proof layer respectively prevent the device from burning and prevent rusting.

[0004] The aforementioned document discloses a polyethylene pipe hot-melt lining device that connects pipes solely through hot fusion. This relies primarily on the natural shrinkage of the polyethylene material during cooling to generate clamping force, resulting in limited bonding strength. When the pipe is subjected to internal pressure fluctuations, external soil stress, or temperature changes, there is a risk of seal failure at the joints, potentially leading to loosening or leakage. Therefore, a polyethylene pipe hot-melt lining device is needed to address this issue. Utility Model Content

[0005] This utility model proposes a device for hot-melt lining of polyethylene pipes. Through the dual effects of hot-melt connection and mechanical compression by inclined thread, it significantly enhances the sealing and tensile strength of the pipe joint, while improving construction safety and pipe durability.

[0006] This utility model is implemented as follows: a polyethylene pipe hot-melt inner lining device includes a first connecting pipe, a second connecting pipe, and an inner lining pipe body. A support ring is fixedly connected to the outer wall of the inner lining pipe body, and a clamping pipe is fixedly connected to the outer wall of the support ring. Both ends of the outer wall of the clamping pipe are set as inward bevels. A limit ring is fixedly connected to the outer wall of the first connecting pipe and the second connecting pipe near the clamping pipe. The end of the limit ring near the clamping pipe is set as an outward bevel. Nuts located outside the limit rings are sleeved on the outer walls of the first connecting pipe and the second connecting pipe, and both nuts are threadedly connected to the clamping pipe.

[0007] In a preferred embodiment of the polyethylene pipe hot-melt lining device of this utility model, a connecting groove is formed between the lining pipe body, the support ring and the clamping pipe, and a flame-retardant layer is provided on the inner wall of the connecting groove.

[0008] As a preferred embodiment of the polyethylene pipe hot-melt lining device of this utility model, the inner wall of the lining pipe body is provided with an anti-rust layer.

[0009] As a preferred embodiment of the polyethylene pipe hot-melt inner lining device of this utility model, hot-melt blocks are provided on both sides of the outer wall of the support ring.

[0010] In a preferred embodiment of the polyethylene pipe hot-melt lining device of this utility model, the opposite ends of the two nuts are both configured as outward-facing bevels.

[0011] In a preferred embodiment of the polyethylene pipe hot-melt lining device of this utility model, the cross-section of the nut is two opposing L-shapes.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, through the ingenious combination of a beveled wedge structure and a threaded pair, applies an additional, continuously adjustable, and powerful mechanical clamping force on top of traditional heat fusion connections. This force converts axial tension into radial compressive force, greatly enhancing the tensile strength, pressure resistance, and sealing reliability of the interface, effectively avoiding the sealing failure problems that may occur in pure heat fusion connections due to material shrinkage or external impact.

[0014] 2. The flame-retardant layer in the device can effectively prevent the pipe material from being accidentally ignited by the high temperature during hot-melt construction, ensuring operational safety; the anti-rust layer on the inner wall can isolate corrosive media and protect the main structure of the pipeline, thereby significantly extending the service life of the entire repair pipeline system and reducing maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is an overall structural diagram of the polyethylene pipe hot-melt inner lining device of this utility model.

[0017] Figure 2 This is a front sectional view of the polyethylene pipe hot-melt inner lining device of this utility model.

[0018] Figure 3 This is a structural diagram of the inner lining tube body of this utility model.

[0019] Figure 4 This is a cross-sectional view of the inner lining tube body of this utility model.

[0020] The markings in the diagram are: 1. First connecting pipe; 2. Second connecting pipe; 3. Inner liner pipe body; 4. Support ring; 5. Clamping pipe; 6. Limiting ring; 7. Nut; 8. Rust-proof layer; 9. Flame-retardant layer; 10. Hot melt block. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figure 1-4 A polyethylene pipe hot-melt inner lining device includes a first connecting pipe 1, a second connecting pipe 2, and an inner lining pipe body 3. A support ring 4 is fixedly connected to the outer wall of the inner lining pipe body 3. A clamping pipe 5 is fixedly connected to the outer wall of the support ring 4. Both ends of the outer wall of the clamping pipe 5 are set as inward slopes. A limit ring 6 is fixedly connected to the outer wall of the first connecting pipe 1 and the second connecting pipe 2 near the clamping pipe 5. The end of the limit ring 6 near the clamping pipe 5 is set as an outward slope. Nuts 7 located outside the limit ring 6 are sleeved on the outer wall of the first connecting pipe 1 and the second connecting pipe 2. Both nuts 7 are threadedly connected to the clamping pipe 5.

[0023] In this embodiment: a hot melt machine is used to heat melt the ends of the first connecting pipe 1 and the second connecting pipe 2, as well as the clamping pipe 5. The first connecting pipe 1 and the second connecting pipe 2 are then inserted into the connecting groove between the inner liner pipe body 3 and the clamping pipe 5. After initial cooling, the nuts 7 at both ends are tightened. The nuts 7 pull the first connecting pipe 1 or the second connecting pipe 2 toward the support ring 4 through the limiting ring 6. Then, the wedge-shaped structure of the outward inclined surface of the limiting ring 6 and the inward inclined surface of the clamping pipe 5 is used to convert the axial tension into a huge radial compressive force, forcing the heat-melted connecting pipe and the clamping pipe 5 to fit tightly together, achieving a dual sealing effect of heat melting and mechanical compression. This utility model, through the combination of the inclined surface structure and the threaded pair, provides an additional adjustable and powerful mechanical compression force after heat melting, which greatly enhances the connection strength and sealing reliability of the interface.

[0024] As a technical optimization of this utility model, a connecting groove is formed between the inner lining tube body 3, the support ring 4 and the clamping tube 5, and a flame-retardant layer 9 is provided on the inner wall of the connecting groove.

[0025] In this embodiment, the flame-retardant layer 9 can effectively prevent the polyethylene pipe from being accidentally ignited by the high temperature during the hot-melt operation, ensuring construction safety and protecting the pipe body structure from heat damage.

[0026] As a technical optimization of this utility model, the inner wall of the inner lining tube body 3 is provided with a rust-proof layer 8.

[0027] In this embodiment, the anti-rust layer 8 can effectively isolate the inner wall of the inner liner from direct contact with the conveying medium (especially water or corrosive fluids), prevent the steel pipe body from rusting, and greatly extend the service life of the entire repaired pipeline.

[0028] As a technical optimization of this utility model, hot melt blocks 10 are provided on both sides of the outer wall of the support ring 4.

[0029] In this embodiment: the hot melt block 10 is heated by an external device to melt its surface, which facilitates fusion connection with the connecting pipe.

[0030] As a technical optimization of this utility model, the opposite ends of the two nuts 7 are both set as outward inclined surfaces.

[0031] In this embodiment: After the relevant pipes are heat-fused together, the pipes need to be buried in the wall or under the ground. By setting the opposite ends of the two nuts 7 as outward slopes, it is easier for the operator to move the pipes when laying them.

[0032] As a technical optimization of this utility model, the cross-section of the nut 7 is two opposing L-shapes.

[0033] In this embodiment: by setting the cross-section of the nut 7 to two opposing L-shapes, it is convenient to pull the first connecting pipe 1 and the second connecting pipe 2 through the limiting ring 6.

[0034] The working principle and usage process of this utility model are as follows: When connecting pipes, the ends of the first connecting pipe 1 and the second connecting pipe 2, as well as the clamping pipe 5, are first heat-fused using a hot-melt machine. The first connecting pipe 1 and the second connecting pipe 2 are then inserted into the connecting groove between the inner liner pipe body 3 and the clamping pipe 5. After initial cooling, the nuts 7 at both ends are tightened. The nuts 7 pull the first connecting pipe 1 or the second connecting pipe 2 toward the support ring 4 through the limiting ring 6. Then, the wedge-shaped structure of the outward inclined surface of the limiting ring 6 and the inward inclined surface of the clamping pipe 5 is used to convert the axial tension into a huge radial compressive force, forcing the heat-fused connecting pipe and the clamping pipe 5 to fit tightly together, achieving a dual sealing effect of heat fusion and mechanical compression. This utility model, through the combination of the inclined surface structure and the threaded pair, provides an additional adjustable and powerful mechanical compression force after heat fusion, greatly enhancing the connection strength and sealing reliability of the interface.

[0035] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A polyethylene pipe hot-melt liner device, comprising a first connecting pipe (1), a second connecting pipe (2), and a liner body (3), wherein a support ring (4) is fixedly connected to the outer wall of the liner body (3), and a clamping pipe (5) is fixedly connected to the outer wall of the support ring (4), characterized in that: Both ends of the outer wall of the clamping tube (5) are set as inward slopes. The outer walls of the first connecting tube (1) and the second connecting tube (2) are fixedly connected to the end of the clamping tube (5) with a limiting ring (6). The end of the limiting ring (6) near the clamping tube (5) is set as an outward slope. The outer walls of the first connecting tube (1) and the second connecting tube (2) are fitted with nuts (7) located outside the limiting ring (6). Both nuts (7) are threadedly connected to the clamping tube (5).

2. The polyethylene pipe hot-melt lining device according to claim 1, characterized in that: A connecting groove is formed between the inner lining tube body (3), the support ring (4) and the clamping tube (5), and the inner wall of the connecting groove is provided with a flame-retardant layer (9).

3. The polyethylene pipe hot-melt lining device according to claim 1, characterized in that: The inner wall of the inner lining tube body (3) is provided with a rust-proof layer (8).

4. The polyethylene pipe hot-melt lining device according to claim 1, characterized in that: The outer walls of the support ring (4) are provided with hot melt blocks (10) on both sides.

5. The polyethylene pipe hot-melt lining device according to claim 1, characterized in that: The opposite ends of the two nuts (7) are both set as outward bevels.

6. The polyethylene pipe hot-melt lining device according to claim 1, characterized in that: The cross-section of the nut (7) is two opposing L-shapes.

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