Anti-freezing metal plastic composite pipe
By embedding an electric heating layer and conductive heating element inside the metal-plastic composite pipe, combined with a temperature sensor and temperature control device, the problem of freezing of traditional composite pipes in cold environments is solved, achieving the effects of active antifreeze, energy saving and convenient installation.
Patent Information
- Application Number
- CN202520238103.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Traditional metal-plastic composite pipes are prone to cracking due to the freezing of internal liquids in cold environments. Existing antifreeze measures, such as external insulation layers and electric heating tapes, have problems such as complicated construction, high energy consumption, and easy aging and detachment of heating elements.
The antifreeze metal-plastic composite pipe with an embedded electric heating layer includes an outer insulation layer, a metal reinforcement layer, an insulation layer, an electric heating layer, and an inner plastic pipe. The electric heating layer has an embedded conductive heating element that is connected to an external power source through electrodes. It works in conjunction with a temperature sensor and a temperature control device to achieve active heating and temperature control.
It features active antifreeze function, is energy-efficient, requires no external equipment, is easy to install, adapts to harsh environments, reduces maintenance costs, and extends service life.
Smart Images
Figure CN223782263U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to composite pipeline technical field, concretely is a kind of anti-freezing metal plastic composite pipe. BACKGROUND
[0002] Metal plastic composite pipe, also known as steel-plastic composite pipe, is a kind of pipeline material that combines metal material and plastic material through a specific process. Its basic structure includes an outer layer of metal material (such as steel pipe) and an inner layer of plastic material (such as polyethylene or polyvinyl chloride). This structure allows metal plastic composite pipe to combine the advantages of metal and plastic;
[0003] Metal plastic composite pipe is widely used in water supply, heating and other fields due to its strength of metal layer and corrosion resistance of plastic layer. However, in cold environments, traditional composite pipes are prone to cracking due to internal liquid freezing, affecting service life. In existing technology, external insulation layer or electric heating tape heating method is often used, but there are the following defects:
[0004] External insulation layer only delays freezing and cannot actively prevent freezing;
[0005] Electric heating tape needs to be installed additionally, which is complex and has high energy consumption;
[0006] The combination of heating elements and pipes is poor, and they are prone to aging and falling off. INVENTION CONTENTS
[0007] The utility model aims to provide an anti-freezing metal plastic composite pipe, which has the characteristics of active anti-freezing, energy saving and efficiency, no need for external equipment, convenient installation, adaptation to harsh environments and reduction of maintenance cost.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anti-freezing metal plastic composite pipe, comprising an outer insulation layer, the inner side of the outer insulation layer is sequentially provided with a metal reinforcing layer, an insulating layer, an electric heating layer and an inner plastic pipe from outside to inside, the outer wall of the electric heating layer is embedded with a spiral distributed conductive heating element, and is connected with an external power supply through an electrode.
[0009] In order to improve the connection strength between each layer of composite pipe, as an anti-freezing metal plastic composite pipe of the utility model, the outer insulation layer, the metal reinforcing layer, the insulating layer, the electric heating layer and the inner plastic pipe are all connected by composite adhesive between adjacent two layers.
[0010] In order to improve the strength of composite pipe, as an anti-freezing metal plastic composite pipe of the utility model, the outer insulation layer is closed-cell polyurethane foam material, the thickness is 2-5mm, the metal reinforcing layer is aluminum corrugated pipe, the wave height is 1.5mm, and the inner plastic pipe adopts PEX material, the wall thickness is 2mm.
[0011] In order to facilitate conductive heating, as a kind of anti-freezing metal plastic composite pipe of the utility model preferably, the conductive heating element of the electric heating layer is carbon fiber wire or metal alloy wire.
[0012] In order to detect heating temperature, as a kind of anti-freezing metal plastic composite pipe of the utility model preferably, the outer wall of the electric heating layer is embedded with temperature sensor.
[0013] In order to facilitate temperature control, as a kind of anti-freezing metal plastic composite pipe of the utility model preferably, the electrode is led out through waterproof joint and connected with external temperature control device, and the temperature sensor is electrically connected with external temperature control device.
[0014] Compared with prior art, the utility model has the advantages as follows:
[0015] The outer thermal insulation layer is closed-cell polyurethane foam material, which is used to reduce heat loss, the metal reinforcing layer is aluminum corrugated pipe, which provides structural support, the inner plastic pipe adopts PEX material, which directly contacts with conveying medium, has strong corrosion resistance and good high temperature resistance, prolongs the service life of the composite pipe, the outer wall of the electric heating layer is embedded with flat spiral distribution conductive heating element, which is connected with external power supply through electrode, facilitates active heating by conduction, can quickly melt ice crystals, realizes start-stop on demand in cooperation with temperature control, is energy-saving and efficient, and the conductive heating element is co-extruded with the pipeline, without external equipment, convenient to install, the outer thermal insulation layer and the insulation layer cooperate to reduce heat loss, improve energy efficiency, the high temperature resistant inner plastic pipe and the corrosion resistant metal reinforcing layer adapt to harsh environment, reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS
[0016] Fig. 1 It is overall sectional view structure of the utility model;
[0017] Fig. 2 It is external structure diagram of electric heating layer of the utility model;
[0018] In the drawing: 1, outer thermal insulation layer;2, metal reinforcing layer;3, insulation layer;4, electric heating layer;5, inner plastic pipe;6, conductive heating element;7, electrode;8, waterproof joint;9, temperature sensor. DETAILED DESCRIPTION
[0019] Please refer to Figs. 1-2 An anti-freezing metal plastic composite pipe, comprising an outer thermal insulation layer 1, the inner side of the outer thermal insulation layer 1 is sequentially provided with a metal reinforcing layer 2, an insulation layer 3, an electric heating layer 4 and an inner plastic pipe 5 from outside to inside, the outer wall of the electric heating layer 4 is embedded with spiral distribution conductive heating element 6, and is connected with external power supply through electrode 7.
[0020] In the embodiment: the outer thermal insulation layer 1 is closed-cell polyurethane foam material, the thickness is 2-5mm, which is used for reducing heat loss, the metal reinforcing layer 2 is aluminum bellows, the wave height is 1.5mm, which provides structural support, the inner plastic pipe 5 adopts PEX material, the wall thickness is 2mm, which directly contacts the conveying medium, has strong corrosion resistance, good high-temperature resistance, prolongs the service life of the composite pipe, the outer wall of the electric heating layer 4 is embedded with the flat spiral distributed conductive heating element 6, is connected with the external power supply through the electrode 7, is convenient for conducting active heating, can quickly melt ice crystals, cooperates with temperature control to realize on-demand start-stop, is energy-saving and efficient, and the conductive heating element 6 is co-extruded with the pipeline, does not need external equipment, is convenient to install, the outer thermal insulation layer 1 cooperates with the insulating layer 3 to reduce heat loss, improves energy efficiency, the high-temperature resistant inner plastic pipe 5 cooperates with the corrosion-resistant metal reinforcing layer 2 to adapt to harsh environments, reduces maintenance costs.
[0021] As a technical optimization scheme of the utility model, the outer thermal insulation layer 1, the metal reinforcing layer 2, the insulating layer 3, the electric heating layer 4 and the inner plastic pipe 5 are adjacent two layers between all through composite glue bonding.
[0022] In the embodiment: the outer thermal insulation layer 1, the metal reinforcing layer 2, the insulating layer 3, the electric heating layer 4 and the inner plastic pipe 5 are adjacent two layers between all through composite glue bonding, make the connection between the layers of composite pipe firm.
[0023] As a technical optimization scheme of the utility model, the outer thermal insulation layer 1 is closed-cell polyurethane foam material, the thickness is 2-5mm, the metal reinforcing layer 2 is aluminum bellows, the wave height is 1.5mm, the inner plastic pipe 5 adopts PEX material, the wall thickness is 2mm.
[0024] In the embodiment: the outer thermal insulation layer 1 is closed-cell polyurethane foam material, the thickness is 2-5mm, which is used for reducing heat loss, the metal reinforcing layer 2 is aluminum bellows, the wave height is 1.5mm, which provides structural support, the inner plastic pipe 5 adopts PEX material, the wall thickness is 2mm, which directly contacts the conveying medium, has strong corrosion resistance, good high-temperature resistance, prolongs the service life of the composite pipe.
[0025] As a technical optimization scheme of the utility model, the conductive heating element 6 of the electric heating layer 4 is carbon fiber wire or metal alloy wire.
[0026] In the embodiment: the conductive heating element 6 of the electric heating layer 4 is carbon fiber wire or metal alloy wire, which is convenient for conducting heating.
[0027] As a technical optimization scheme of the utility model, the outer wall of the electric heating layer 4 is embedded with the temperature sensor 9.
[0028] In the embodiment: the outer wall of the electric heating layer 4 is embedded with the temperature sensor 9, which is convenient for monitoring the heating temperature and cooperating with the external temperature control device to control temperature.
[0029] As a technical optimization scheme of the utility model, the electrode 7 is led out through the waterproof joint 8 and connected with the external temperature control device, and the temperature sensor 9 is electrically connected with the external temperature control device.
[0030] In the embodiment, the electrode 7 is led out through the waterproof joint 8 and connected with the external temperature control device, and the temperature sensor 9 is electrically connected with the external temperature control device, so that the temperature control is convenient.
[0031] Working principle: the outer thermal insulation layer 1 is a closed-cell polyurethane foam material, with a thickness of 2-5mm, for reducing heat loss; the metal reinforcing layer 2 is an aluminum corrugated pipe with a wave height of 1.5mm, for providing structural support; the inner plastic pipe 5 is made of PEX material, with a wall thickness of 2mm, for directly contacting the conveying medium, and has strong corrosion resistance and good high-temperature resistance, thereby prolonging the service life of the composite pipe; the outer wall of the electric heating layer 4 is embedded with flat helically distributed conductive heating elements 6; the electrode 7 is connected with an external power supply, so that the conductive heating is facilitated, the ice crystals can be quickly melted, and the start-stop according to the demand can be realized in cooperation with the temperature control, thereby achieving energy saving and high efficiency; the conductive heating elements 6 are co-extruded with the pipe, without the need for external equipment, and are convenient to install; the outer thermal insulation layer 1 and the insulating layer 3 cooperate to reduce heat loss and improve energy efficiency; the high-temperature resistant inner plastic pipe 5 and the corrosion-resistant metal reinforcing layer 2 adapt to harsh environments and reduce maintenance costs.
[0032] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A freeze-proof metal-plastic composite pipe comprising an outer thermal insulation layer (1), characterized in that: The inner side of the outer thermal insulation layer (1) is sequentially provided with a metal reinforcing layer (2), an insulating layer (3), an electric heating layer (4) and an inner plastic tube (5) from outside to inside, the outer wall of the electric heating layer (4) is embedded with spiral distributed conductive heating elements (6), and is connected with an external power supply through electrodes (7).
2. The freeze-proof metal-plastic composite pipe according to claim 1, wherein: The outer thermal insulation layer (1), the metal reinforcing layer (2), the insulating layer (3), the electric heating layer (4) and the inner plastic tube (5) are all adhered by composite glue between two adjacent layers.
3. The freeze-proof metal-plastic composite pipe according to claim 1, wherein: The outer thermal insulation layer (1) is closed-cell polyurethane foam material, the thickness is 2-5mm, the metal reinforcing layer (2) is an aluminum corrugated pipe, the wave height is 1.5mm, and the inner plastic tube (5) adopts PEX material, the wall thickness is 2mm.
4. The freeze-proof metal-plastic composite pipe according to claim 1, wherein: The conductive heating elements (6) of the electric heating layer (4) are carbon fiber wires or metal alloy wires.
5. The freeze-proof metal-plastic composite pipe according to claim 1, wherein: The outer wall of the electric heating layer (4) is embedded with a temperature sensor (9).
6. The freeze-proof metal-plastic composite pipe according to claim 5, wherein: The electrodes (7) are led out through waterproof joints (8) and connected with an external temperature control device, and the temperature sensor (9) is electrically connected with the external temperature control device.