High-temperature-resistant polyethylene pipe fitting

Abstract

The utility model discloses a high-temperature-resistant polyethylene pipe fitting, and belongs to the field of polyethylene pipe fittings. The high-temperature-resistant polyethylene pipe fitting comprises an inner pipe, a metal outer layer is fixedly connected to the surface of the inner pipe, a polyethylene outer sleeve is fixedly connected to the outer surface of the metal outer layer, a protective layer is arranged on the surface of the polyethylene outer sleeve, and a plurality of heat conduction frames are arranged on the outer side of the protective layer at intervals; the inner side of the heat conduction frame penetrates through the protective layer and is fixedly connected with the surface of the metal outer layer, the heat conduction frame and the metal outer layer are both made of heat conduction metal materials, the protective layer comprises an adhesive layer wrapping the surface of the polyethylene outer sleeve, and the outer surface of the adhesive layer is coated with corrosion-resistant paint; heat is quickly absorbed and dispersed through the metal material, the polyethylene material is prevented from being directly exposed to a high-temperature environment, thermal deformation of the polyethylene material is delayed, the defect of high-temperature softening of the polyethylene material is overcome through the high rigidity of the metal layer, and the overall pressure resistance of the pipe fitting is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyethylene pipe fittings technology, and in particular to a high-temperature resistant polyethylene pipe fitting. Background Technology

[0002] Polyethylene pipe fittings are pipe connection components made primarily of polyethylene. They are widely used in water supply, gas transmission, and industrial fluid transmission. Their corrosion resistance, flexibility, and long service life make them an ideal substitute for traditional metal pipe fittings.

[0003] For example, the patent application number published on the China Patent Network is 201920008152.4, and the patent name is: Polyethylene Pipe Fittings for Nuclear Industry, including a protective shell. The protective shell is characterized by comprising, from left to right, a connector, a frustum-shaped outer shell, and a cylindrical outer shell, all integrated into one piece. A connector a is installed at one end of the cylindrical outer shell, and a sealing device is fixedly connected to one end of connector a. The sealing device has a frustum-shaped groove, and a rubber gasket is adhered to the inner wall of the frustum-shaped groove. Flanges are fitted parallel to each other on the left and right ends of the cylindrical outer shell. The vacuum layer is a double-layered glass cylindrical structure, and an air extraction hole is provided on the surface of the vacuum layer. The vacuum tube is evacuated through the air extraction hole to prevent radiation damage to the polyethylene pipe. The heat insulation layer includes a metal protective shell and a rock wool board. The metal protective shell has an internal cavity, and the rock wool board is placed inside the cavity to prevent the temperature of the medium inside the polyethylene pipe from dissipating.

[0004] However, existing polyethylene pipe fittings are mainly made by thermoplastic extrusion molding. Therefore, when the pipe fittings are exposed to high temperature environment for a long time, the material is prone to thermal deformation, which affects the stability of the pipeline. Utility Model Content

[0005] The purpose of this invention is to solve the problem of easy thermal deformation of polyethylene pipe fittings processed by thermoplastic processing in the prior art, and to propose a high-temperature resistant polyethylene pipe fitting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-temperature resistant polyethylene pipe fitting includes an inner tube, a metal outer layer fixedly connected to the surface of the inner tube, a polyethylene outer jacket fixedly connected to the outer surface of the metal outer layer, and a protective layer provided on the surface of the polyethylene outer jacket.

[0008] As a preferred technical solution of this application, the outer side of the protective layer is provided with a plurality of heat-conducting frames at intervals, the inner side of the heat-conducting frames penetrates the protective layer and is fixedly connected to the surface of the metal outer layer, and the materials of the heat-conducting frames and the metal outer layer are both heat-conducting metal materials.

[0009] As a preferred technical solution of this application, the protective layer includes an adhesive layer wrapped around the surface of a polyethylene jacket, the outer surface of the adhesive layer being coated with a corrosion-resistant coating, and the adhesive layer wrapping around the surface of the heat-conducting frame.

[0010] As a preferred technical solution of this application, a bearing ring is provided around the surface of the protective layer, the heat-conducting frame is located between the bearing ring and the protective layer, and a plurality of buffer openings are provided around the surface of the bearing ring, and the bearing ring is elastic.

[0011] As a preferred technical solution of this application, a plurality of support tubes are arranged around the surface of the protective layer, and the heat-conducting frame is sleeved on the surface of the support tubes, and the support tubes are used to support the heat-conducting frame.

[0012] As a preferred technical solution of this application, a metal wire is fixedly connected to the inner surface of the inner tube, and the metal wire is spiral and fits the inner surface of the inner tube.

[0013] Compared with the prior art, this utility model provides a high-temperature resistant polyethylene pipe fitting, which has the following beneficial effects:

[0014] 1. This high-temperature resistant polyethylene pipe fitting uses a metal material to quickly absorb and disperse heat, preventing the polyethylene material from being directly exposed to a high-temperature environment and delaying its thermal deformation. The high rigidity of the metal layer compensates for the defect of polyethylene material softening at high temperatures, thus improving the overall pressure resistance of the pipe fitting.

[0015] 2. This high-temperature resistant polyethylene pipe fitting has a heat-conducting frame that penetrates the protective layer and connects directly to the outer metal layer, forming a "thermal bridge" that quickly directs external heat to the metal layer, accelerates heat dissipation, and prevents heat from accumulating in the protective layer.

[0016] 3. This high-temperature resistant polyethylene pipe fitting uses an adhesive layer to tightly bond the heat-conducting frame to the polyethylene jacket, preventing the heat-conducting frame from detaching due to vibration or external force. The adhesive layer wraps around the surface of the heat-conducting frame, isolating it from moisture and corrosive media, and preventing metal oxidation.

[0017] 4. This high-temperature resistant polyethylene pipe fitting absorbs external impact or extrusion loads by setting the deformation of the buffer opening of the elastic bearing ring, preventing the protective layer and heat-conducting frame from being damaged by external forces.

[0018] 5. This high-temperature resistant polyethylene pipe fitting provides rigid support for the heat conduction frame by setting up a support pipe, which prevents it from bending and deforming under high temperature or external force, and ensures the stability of the heat conduction path.

[0019] 6. This high-temperature resistant polyethylene pipe fitting, by setting a spiral metal wire embedded in the inner wall of the inner pipe, significantly improves the inner pipe's resistance to internal pressure and prevents the pipe diameter from expanding or rupturing due to fluid pressure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the present invention;

[0022] Figure 3 This is a side view of the structure of this utility model;

[0023] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Inner tube; 2. Metal outer layer; 3. Polyethylene jacket; 4. Protective layer; 5. Heat-conducting frame; 6. Adhesive layer; 7. Corrosion-resistant coating; 8. Bearing ring; 9. Buffer opening; 10. Support tube; 11. Metal wire. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Reference Figure 1-4A high-temperature resistant polyethylene pipe fitting includes an inner pipe 1, a metal outer layer 2 fixedly connected to the surface of the inner pipe 1, a polyethylene outer jacket 3 fixedly connected to the outer surface of the metal outer layer 2, and a protective layer 4 disposed on the surface of the polyethylene outer jacket 3. The metal material rapidly absorbs and disperses heat, preventing the polyethylene material from being directly exposed to the high-temperature environment and delaying its thermal deformation. The high rigidity of the metal layer compensates for the high-temperature softening defect of the polyethylene material, improving the overall pressure resistance of the pipe fitting. Several heat-conducting frames 5 are spaced apart on the outer side of the protective layer 4. The inner side of the heat-conducting frames 5 penetrates the protective layer 4 and is fixedly connected to the surface of the metal outer layer 2. Both the heat-conducting frames 5 and the metal outer layer 2 are made of thermally conductive materials. The protective layer 4 is made of metal and includes an adhesive layer 6 wrapped around the surface of the polyethylene jacket 3. The outer surface of the adhesive layer 6 is coated with a corrosion-resistant coating 7. The adhesive layer 6 is wrapped around the surface of the heat-conducting frame 5. A support ring 8 is arranged around the surface of the protective layer 4. The heat-conducting frame 5 is located between the support ring 8 and the protective layer 4. Several buffer openings 9 are opened around the surface of the support ring 8. The support ring 8 is elastic. Several support tubes 10 are arranged around the surface of the protective layer 4. The heat-conducting frame 5 is sleeved on the surface of the support tubes 10. The support tubes 10 are used to support the heat-conducting frame 5. A metal wire 11 is fixedly connected to the inner surface of the inner tube 1. The metal wire 11 is spiral and fits the inner surface of the inner tube 1.

[0028] Specifically, during operation / use, this high-temperature resistant polyethylene pipe fitting features: the inner pipe 1, serving as the core channel for fluid transport, has spiral metal wires 11 embedded on its inner surface. The high strength of the metal wires 11 enhances the inner pipe 1's resistance to deformation. Simultaneously, the spiral structure allows the inner pipe 1 to undergo elastic deformation along the axial and radial directions during thermal expansion and contraction, preventing localized stress concentration caused by temperature changes and thus maintaining the structural stability of the inner pipe 1 at high temperatures. The outer metal layer 2 tightly covers the outside of the inner pipe 1. When external high temperatures are transferred to the outer metal layer 2 through the protective layer 4, the metal material rapidly absorbs heat and evenly distributes it through its large surface area, preventing... When the local temperature is too high, the high strength of the metal layer provides mechanical support for the inner tube 1 and the polyethylene outer jacket 3, inhibiting the softening and deformation of the polyethylene material at high temperatures. The heat-conducting frame 5 penetrates the protective layer 4 and is directly connected to the outer metal layer 2, forming an efficient heat conduction path. External heat is quickly transferred to the metal layer through the heat-conducting frame 5, accelerating heat dissipation. The support tube 10 is sleeved on the outside of the heat-conducting frame 5 to prevent the heat-conducting frame 5 from deforming due to mechanical impact or thermal stress, ensuring the long-term effectiveness of the heat conduction path. At the same time, the buffer opening 9 allows the bearing ring 8 to elastically deform when the pipe is squeezed by external force or temperature changes, dispersing the external mechanical load and avoiding damage to the protective layer 4 and the heat-conducting frame 5.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high temperature resistant polyethylene pipe fitting comprising an inner pipe (1), characterized in that, The surface of the inner tube (1) is fixedly connected with a metal outer layer (2), the outer surface of the metal outer layer (2) is fixedly connected with a polyethylene outer sleeve (3), and the surface of the polyethylene outer sleeve (3) is provided with a protective layer (4); A plurality of heat-conducting frames (5) are arranged at the outer side of the protective layer (4) in a spaced manner, the inner side of the heat-conducting frame (5) penetrates the protective layer (4) and is fixedly connected with the surface of the metal outer layer (2), and the material of the heat-conducting frame (5) and the metal outer layer (2) is heat-conducting metal material; The protective layer (4) comprises a glue layer (6) wrapped on the surface of the polyethylene outer sleeve (3), the outer surface of the glue layer (6) is coated with corrosion-resistant paint (7), and the glue layer (6) is wrapped on the surface of the heat-conducting frame (5); The surface of the protective layer (4) is surrounded by a bearing ring (8), the heat-conducting frame (5) is located between the bearing ring (8) and the protective layer (4), the surface of the bearing ring (8) is surrounded by a plurality of buffer openings (9), and the bearing ring (8) has elasticity; The surface of the protective layer (4) is surrounded by a plurality of support tubes (10), the heat-conducting frame (5) is sleeved on the surface of the support tube (10), and the support tube (10) is used for supporting the heat-conducting frame (5); The inner surface of the inner tube (1) is fixedly connected with a metal wire (11), and the metal wire (11) is in a spiral shape and adheres to the inner surface of the inner tube (1).

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