Copper-plastic PPR pipe for home decoration and preparation method thereof

Abstract

The application discloses a copper-plastic PPR pipe for home decoration and a preparation method thereof. The copper-plastic PPR pipe comprises an inner copper pipe, and a heat insulation layer, a PPR layer, a noise reduction layer and a reinforcing layer are sequentially formed on the outer surface of the inner copper pipe along the circumferential direction and the longitudinal direction by an extrusion device. The ceramic fiber, the fire-resistant clay and the siliceous raw materials are mixed and extruded on the outer surface of the inner copper pipe, so that the heat insulation effect of the whole inner copper pipe is effectively improved. The heat insulation effect of the inner copper pipe is improved, and the heat is not directly applied to the PPR layer due to heat dissipation, so that the service life of the PPR layer is prolonged. The noise reduction layer not only has a good noise reduction effect, but also makes the whole pipe not too heavy, so that the pipe is convenient to carry in use. The reinforcing layer further improves the strength of the pipe, so that the PPR layer is prevented from being damaged due to extrusion during transportation.

Description

Technical Field

[0001] This invention belongs to the technical field of copper-plastic PPR pipes, specifically, it relates to a copper-plastic PPR pipe for home decoration and its preparation method. Background Technology

[0002] Copper-plastic composite pipe is a type of water supply pipe made by hot-melt extrusion bonding of copper water pipe and PP-R. In the current home decoration copper-plastic composite pipe, effective heat insulation components are usually not installed in the copper-plastic composite pipe. The heat carried out by the inner copper pipe directly acts on the PPR outer pipe, which can easily affect the service life of the PPR pipe.

[0003] A Chinese patent (publication number: CN206669133U) discloses a household copper PPR water pipe, comprising a pipe body, the pipe body including an inner pipe layer and an outer pipe layer, the inner pipe layer and the outer pipe layer being fixedly connected by connecting ribs, a sound insulation layer provided on the inner pipe layer, the sound insulation layer including a sound insulation foam layer, a sound insulation rubber layer covered on the outside of the sound insulation foam layer, a sponge layer covered on the outside of the sound insulation rubber layer, an inner rubber layer covered on the outside of the sponge layer, an inner pressure-bearing layer covered on the outside of the inner rubber layer, a reinforcing layer covered on the outside of the inner pressure-bearing layer, an intermediate aluminum layer provided inside the reinforcing layer, and a copper pipe layer provided on the outer pipe layer.

[0004] In the process of using the aforementioned PPR pipes, the overall strength of the pipe is increased by the intermediate aluminum layer. However, the connection between the inner copper pipe and the PPR is not equipped with an effective heat insulation component. When hot water is passed through the inner copper pipe in the home, due to the good thermal conductivity of copper, the heat will not be dissipated, affecting the user's use of hot water. Furthermore, the dissipated heat will also act on the PPR and even the outer concrete covering, affecting the service life of the PPR pipe.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a copper-plastic PPR pipe for home decoration and its preparation method, so as to achieve the purpose of effective heat insulation that copper-plastic pipes cannot effectively achieve in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a copper-plastic PPR pipe for home decoration, comprising: an inner copper pipe, wherein the inner copper pipe is extruded from the inside to the outside in the circumferential and longitudinal directions by an extrusion device to form a heat insulation layer, a PPR layer, a noise reduction layer and a reinforcing layer in sequence;

[0008] The heat insulation layer is made of ceramic fiber as the main raw material, and refractory clay and silica raw materials as mixed raw materials, with 4 to 6 parts of ceramic fiber, 2 to 3 parts of refractory clay and 1 to 2 parts of silica raw materials.

[0009] The noise reduction layer uses polyurethane foam as the main raw material and graphene as a mixed raw material, with 5-6 parts of polyurethane foam and 0.015-0.018 parts of graphene.

[0010] The reinforcing layer is made of glass fiber as the main raw material, resin as the matrix, and antioxidant and reinforcing fiber as mixed raw materials. The mixture consists of 3-5 parts glass fiber, 7-12 parts resin, 1-1.5 parts antioxidant, and 1.5-2 parts reinforcing fiber.

[0011] A method for manufacturing copper-plastic PPR pipes for home decoration includes the following steps:

[0012] S1. Clean the outer surface of the inner copper tube and preheat the inner copper tube;

[0013] S2. Add the raw materials (ceramic fiber, refractory clay and silica raw materials) in the insulation layer into the extrusion equipment in equal proportions, and extrude them onto the outer surface of the inner copper tube by the extrusion equipment. After extrusion, cool and shape them.

[0014] S3. Extruding a PPR layer onto the outer surface of the pipe, which was obtained in step S2, and continuing to cool and mold.

[0015] S4. Add the required raw materials (polyurethane foam and graphene) for the noise reduction layer into the extrusion equipment in equal proportions, and extrude them onto the outer surface of the pipe obtained in step S3, and then cool and solidify.

[0016] S5. Add the required raw materials (glass fiber, resin, antioxidant and reinforcing fiber) for the reinforcing layer to the extrusion equipment in equal proportions, and extrude them onto the outer surface of the pipe obtained in step S4, and then cool and solidify.

[0017] S6. Pull the pipes obtained in step S5 and cut them to a certain length. After cutting, inspect them. Pack the qualified pipes into the warehouse and recycle the unqualified pipes.

[0018] Furthermore, the extrusion equipment includes a preheating component for preheating and mixing the raw materials, a quantitative feeding component for quantitatively discharging the raw materials, and a filtering component for filtering unqualified raw materials. The preheating component, the quantitative feeding component, and the filtering component are arranged sequentially from top to bottom along the axial direction on the extrusion equipment.

[0019] Furthermore, the preheating assembly includes a feeding frame positioned above the extrusion equipment. A mounting shaft is rotatably connected to the top of the feeding frame, and a drive gear is connected to the mounting shaft. A second drive motor that drives the drive gear is connected to the other end of the mounting shaft. A driven gear is meshed with one side of the drive gear, and a stirring frame for agitating the raw materials is connected to the driven gear. A second rotary joint and a first rotary joint are connected to the top and bottom of the stirring frame, respectively. A water storage tank is provided inside the stirring frame. A water tank is connected to the top of the extrusion equipment, and a water pump is connected to the water tank. A heating plate for heating the water in the water tank is connected to one side of the water tank. A first conveying pipe is connected to the water pump, and the other end of the first conveying pipe is connected to the first rotary joint. A second conveying pipe is connected to the water tank, and the other end of the second conveying pipe is connected to the second rotary joint.

[0020] Furthermore, a scraper is connected to the mixing rack, and the scraper abuts against the inner wall of the feeding frame.

[0021] Furthermore, the quantitative feeding assembly includes a mounting frame connected to the top of the extrusion equipment. The top of the mounting frame is connected to the bottom of the feeding frame. A feeding frame is connected inside the mounting frame. The top and bottom of the feeding frame are respectively provided with a feed port and a discharge port. A quantitative feeding frame is rotatably mounted inside the feeding frame. A second servo motor that drives the quantitative feeding frame to rotate is connected to the rear side of the feeding frame. A sliding plate is slidably mounted inside the quantitative feeding frame. A damper is connected to the bottom of the sliding plate. A first compression spring is sleeved on the damper. One end of the first compression spring is connected to the sliding plate, and the other end is connected to the inner wall of the quantitative feeding frame. A contact control switch that controls the second servo motor is connected inside the quantitative feeding frame.

[0022] Furthermore, scrapers are connected to both sides of the quantitative feeding frame, and the scrapers abut against the inner wall of the feeding frame.

[0023] Furthermore, the filter assembly includes a filter screen plate, which is slidably disposed within a mounting frame. A contact plate is rotatably disposed within the mounting frame, and a rotating shaft is connected to the contact plate. A first drive motor for driving the rotating shaft is connected to the rear side of the mounting frame. Two symmetrical mounting plates are connected within the mounting frame. A second compression spring is connected to the top of the mounting plate, and the top of the second compression spring is connected to the bottom of the filter screen plate. A collection box for collecting the filtered raw materials is connected to the top of the extrusion equipment.

[0024] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0025] 1. In this invention, by mixing ceramic fibers with refractory clay and siliceous raw materials and extruding them onto the outer surface of the inner copper pipe, the overall heat insulation effect of the inner copper pipe can be effectively improved. This not only enhances the heat preservation effect of the inner copper pipe but also prevents heat dissipation from directly affecting the PPR layer and shortening its service life. The noise reduction layer not only achieves a good noise reduction effect but also prevents the overall weight of the pipe from becoming too heavy, making it easy to handle during use. The reinforcing layer further enhances the strength of the pipe, preventing damage to the PPR layer due to compression or other reasons during transportation.

[0026] 2. In this invention, during the extrusion process, the raw materials are first preheated and mixed using a preheating component, then quantitatively fed using a metering component to avoid excessive feeding rate, and finally filtered using a filtering component to filter out unqualified raw materials, thereby further improving the forming rate and quality of the pipe. Attached Figure Description

[0027] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0028] Figure 1 A schematic diagram of the overall structure of a copper-plastic PPR pipe for home decoration.

[0029] Figure 2 This is a schematic diagram of the overall structure of an extrusion device;

[0030] Figure 3 This is a schematic diagram of the internal structure of an extrusion device;

[0031] Figure 4 This is a schematic diagram of the connection structure between a quantitative feeding component and a filter component in an extrusion device.

[0032] Figure 5 A rear view of a mounting frame in an extrusion device;

[0033] Figure 6 This is a schematic diagram of the overall structure of a preheating component in an extrusion device;

[0034] Figure 7 This is a cross-sectional view of a preheating component in an extrusion apparatus.

[0035] Numbered components in the diagram: 1. Inner copper tube; 2. Insulation layer; 3. PPR layer; 4. Noise reduction layer; 5. Reinforcing layer; 6. Extrusion equipment; 7. Screw conveyor shaft; 8. First servo motor; 9. Quantitative feeding assembly; 901. Mounting frame; 902. Feeding frame; 903. Quantitative feeding frame; 904. Second servo motor; 905. Slide plate; 906. Damper; 907. First compression spring; 908. Contact control switch; 10. Scraper; 11. Filter assembly; 1101. Filter screen; 1102. Contact plate; 110 3. Rotating shaft; 1104. First drive motor; 1105. Storage box; 12. Mounting plate; 13. Second compression spring; 14. Preheating assembly; 1401. Feeding frame; 1402. Drive gear; 1403. Second drive motor; 1404. Driven gear; 1405. Stirring rack; 1406. First rotary joint; 1407. Second rotary joint; 1408. Water tank; 1409. Water pump; 1410. Heating plate; 1411. First conveying pipe; 1412. Second conveying pipe; 15. Scraper.

[0036] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", 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 invention 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 limiting this invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] like Figure 1As shown, the present invention provides a copper-plastic PPR pipe for home decoration, comprising: an inner copper pipe 1, wherein the inner copper pipe 1 is extruded from the inside to the outside in the circumferential and longitudinal directions by an extrusion equipment 6 to form a heat insulation layer 2, a PPR layer 3, a noise reduction layer 4 and a reinforcing layer 5.

[0041] The heat insulation layer 2 is made of ceramic fiber as the main raw material, and refractory clay and silica raw materials are mixed raw materials. The mixture consists of 4 to 6 parts ceramic fiber, 2 to 3 parts refractory clay, and 1 to 2 parts silica raw materials.

[0042] The noise reduction layer 4 uses polyurethane foam as the main raw material and graphene as a mixed raw material, with 5-6 parts of polyurethane foam and 0.015-0.018 parts of graphene.

[0043] The reinforcing layer 5 is made of glass fiber as the main raw material, resin as the matrix, and antioxidant and reinforcing fiber as mixed raw materials. The mixture consists of 3-5 parts glass fiber, 7-12 parts resin, 1-1.5 parts antioxidant, and 1.5-2 parts reinforcing fiber.

[0044] Specifically, by mixing ceramic fibers with refractory clay and silica raw materials and extruding them onto the outer surface of the inner copper pipe 1, the overall heat insulation effect of the inner copper pipe 1 can be effectively improved. This not only enhances the heat preservation effect of the inner copper pipe 1 but also prevents heat dissipation from directly affecting the PPR layer 3 and shortening its service life. The noise reduction layer 4, which uses a mixture of polyurethane foam and graphene, not only achieves a good noise reduction effect but also prevents the overall weight of the pipe from becoming too heavy, making it easy to handle during use. The reinforcing layer 5 further enhances the strength of the pipe, preventing damage to the PPR layer 3 caused by compression or other reasons during transportation.

[0045] A method for preparing copper-plastic PPR pipes for home decoration includes the following steps:

[0046] S1. Clean the outer surface of the inner copper tube 1 and preheat the inner copper tube 1;

[0047] S2. Add the raw materials ceramic fiber, refractory clay and silica raw materials in the insulation layer 2 into the extrusion equipment 6 in equal proportions, and extrude them onto the outer surface of the inner copper tube 1 by the extrusion equipment 6. After extrusion, cool and shape them.

[0048] S3. In step S2, the outer surface of the pipe is extruded with PPR layer 3 and then cooled and molded.

[0049] S4. Add the required raw materials polyurethane foam and graphene to the extrusion equipment 6 in equal proportions, and extrude them onto the outer surface of the pipe obtained in step S3 by the extrusion equipment 6, and then cool and solidify.

[0050] S5. The required raw materials glass fiber, resin, antioxidant and reinforcing fiber for the reinforcing layer 5 are added to the extrusion equipment 6 in equal proportions, and the extrusion equipment 6 extrudes the material onto the outer surface of the pipe obtained in step S4, and then cools and forms the pipe.

[0051] S6. Pull the pipes obtained in step S5 and cut them to a certain length. After cutting, inspect them. Pack the qualified ones into the warehouse, and recycle and crush the unqualified ones for reuse.

[0052] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0053] The extrusion equipment 6 includes a preheating component 14 for preheating and mixing raw materials, a quantitative feeding component 9 for quantitatively feeding raw materials, and a filtering component 11 for filtering unqualified raw materials. The preheating component 14, the quantitative feeding component 9, and the filtering component 11 are arranged sequentially from top to bottom along the axial direction on the extrusion equipment 6. This arrangement facilitates the premixing and heating of raw materials introduced into each layer before quantitative feeding. During the quantitative feeding process, the raw materials can also be filtered to avoid uneven particle distribution, which would affect subsequent hot melting.

[0054] Preferably, the extrusion equipment 6 is equipped with a heating wire for heating the inside of the extrusion equipment 6, and a spiral conveyor shaft 7 is rotatably provided inside the extrusion equipment 6 for conveying raw materials. A first servo motor 8 for driving the spiral conveyor shaft 7 to rotate is connected to one side of the extrusion equipment 6.

[0055] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0056] Specifically, such as Figure 5-7As shown, the preheating assembly 14 includes a feeding frame 1401, which is located above the extrusion equipment 6. A mounting shaft is rotatably connected to the top of the feeding frame 1401, and a drive gear 1402 is connected to the mounting shaft. A second drive motor 1403 is connected to the other end of the mounting shaft to drive the drive gear 1402. A driven gear 1404 is meshed with one side of the drive gear 1402, and a stirring frame 1405 for stirring the raw materials is connected to the driven gear 1404. A second rotary joint 1407 and a first rotary joint 1407 are respectively connected to the top and bottom of the stirring frame 1405. A water storage tank is provided inside the connector 1406 and the mixing rack 1405. A water storage tank 1408 is connected to the top of the extrusion equipment 6. A water pump 1409 is connected to the water storage tank 1408. A heating plate 1410 for heating the water in the water storage tank 1408 is connected to one side of the water storage tank 1408. A first conveying pipe 1411 is connected to the water pump 1409. The other end of the first conveying pipe 1411 is connected to the first rotary joint 1406. A second conveying pipe 1412 is connected to the water storage tank 1408. The other end of the second conveying pipe 1412 is connected to the second rotary joint 1407.

[0057] Specifically, the heating plate 1410 is equipped with a heating rod for heating the water in the water storage tank 1408. The first rotary joint 1406 and the second rotary joint 1407 are pipe connection devices, and the connected pipes can rotate relative to each other. This is prior art and will not be explained in detail here. The top of the feeding frame 1401 is provided with a guide port.

[0058] The water in the water storage tank 1408 is heated by the heating plate 1410. The heated water is then pumped out by the water pump 1409 and flows into the water storage tank of the mixing frame 1405, so that the mixing frame 1405 is heated. Then, the second drive motor 1403 is started to drive the drive gear 1402 to rotate. The driven gear 1404, which is meshed with one side of the drive gear 1402, drives the mixing frame 1405 to rotate, so that the mixing frame 1405 stirs the raw materials in the feeding frame 1401. While mixing the raw materials, the raw materials can also be heated, thereby achieving the purpose of mixing and preheating.

[0059] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0060] like Figure 7 As shown, a scraper 15 is connected to the mixing rack 1405. The scraper 15 abuts against the inner wall of the feeding frame 1401. This setting can scrape the inner wall of the feeding frame 1401 during mixing to prevent impurities from remaining on it.

[0061] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0062] like Figure 4 The quantitative feeding component 9 includes a mounting frame 901, which is connected to the top of the extrusion equipment 6. The top of the mounting frame 901 is connected to the bottom of the feeding frame 1401. A feeding frame 902 is connected inside the mounting frame 901. The top and bottom of the feeding frame 902 are respectively provided with a feed port and a discharge port. A quantitative feeding frame 903 is rotatably installed inside the feeding frame 902. A second servo motor 904 that drives the quantitative feeding frame 903 to rotate is connected to the rear side of the feeding frame 902. A sliding plate 905 is slidably installed inside the quantitative feeding frame 903. A damper 906 is connected to the bottom of the sliding plate 905. A first compression spring 907 is sleeved on the damper 906. One end of the first compression spring 907 is connected to the sliding plate 905, and the other end is connected to the inner wall of the quantitative feeding frame 903. A contact control switch 908 that controls the second servo motor 904 is connected inside the quantitative feeding frame 903.

[0063] To avoid clogging of the feed inlet due to excessively fast feeding, the raw material fed into the quantitative feeding frame 903 by the feeding frame 1401 gradually increases in the quantitative feeding frame 903. This causes the slide plate 905 to move vertically downward and squeeze the dampers 906 and 907. When the weight inside the slide plate 905 overcomes the elasticity of the dampers 906 and the first compression spring 907, it indicates that the weight has reached the set value. At this time, the slide plate 905 contacts the contact control switch 908, causing the contact control switch 908 to be activated, which causes the second servo motor 904 to drive the quantitative feeding frame 903 to rotate, pouring the raw material out of the quantitative feeding frame 903.

[0064] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0065] like Figure 4 As shown, scrapers 10 are connected to both sides of the quantitative feeding frame 903. The scrapers 10 abut against the inner wall of the feeding frame 902. This setting facilitates the scraping of residual raw materials in the feeding frame 902.

[0066] Furthermore, as another specific embodiment of the present invention, the present invention provides a method for preparing copper-plastic PPR pipes for home decoration.

[0067] like Figure 4The filter assembly 11 includes a filter screen 1101, which is slidably disposed within a mounting frame 901. A contact plate 1102 is rotatably disposed within the mounting frame 901, and a rotating shaft 1103 is connected to the contact plate 1102. A first drive motor 1104 that drives the rotating shaft 1103 to rotate is connected to the rear side of the mounting frame 901. Two symmetrical mounting plates 12 are connected within the mounting frame 901. A second compression spring 13 is connected to the top of the mounting plate 12, and the top of the second compression spring 13 is connected to the bottom of the filter screen 1101. A collection box 1105 for collecting the filtered raw materials is connected to the top of the extrusion equipment 6.

[0068] The filter screen 1101 can filter the raw materials to avoid the impact of uneven particle size on the subsequent hot melting effect. The first drive motor 1104 drives the contact plate 1102 to rotate and contact the filter screen 1101, causing the filter screen 1101 to shake, thereby improving its filtration efficiency. The mounting plate 12 and the second compression spring 13 facilitate the installation of the filter screen 1101 and further increase its shaking amplitude, thereby improving the filtration effect.

[0069] Working principle: By mixing ceramic fibers with refractory clay and silica raw materials and extruding them onto the outer surface of the inner copper pipe 1, the overall heat insulation effect of the inner copper pipe 1 can be effectively improved. This not only improves the heat preservation effect of the inner copper pipe 1, but also prevents heat dissipation from directly acting on the PPR layer 3, thus shortening the service life of the PPR layer 3. The noise reduction layer 4, which uses a mixture of polyurethane foam and graphene, not only achieves a good noise reduction effect, but also prevents the overall weight of the pipe from being too heavy, making it easy to handle during use. The reinforcing layer 5 further improves the strength of the pipe, preventing the PPR layer 3 from being damaged due to compression or other reasons during transportation.

[0070] The water in the water storage tank 1408 is heated by the heating plate 1410. The heated water is then pumped out by the water pump 1409 and flows into the water storage tank of the mixing frame 1405, so that the mixing frame 1405 is heated. Then, the second drive motor 1403 is started to drive the drive gear 1402 to rotate. The driven gear 1404, which is meshed with one side of the drive gear 1402, drives the mixing frame 1405 to rotate, so that the mixing frame 1405 stirs the raw materials in the feeding frame 1401. While mixing the raw materials, the raw materials can also be heated, thereby achieving the purpose of mixing and preheating.

[0071] As the amount of material in the quantitative feeding frame 903 gradually increases, the slide plate 905 moves vertically downward and squeezes the dampers 906 and 907. When the weight inside the slide plate 905 overcomes the elasticity of the dampers 906 and the first compression spring 907, it indicates that the weight has reached the set value. At this time, the slide plate 905 contacts the contact control switch 908, causing the contact control switch 908 to be activated, which causes the second servo motor 904 to drive the quantitative feeding frame 903 to rotate, pouring the material out of the quantitative feeding frame 903.

[0072] The filter screen 1101 can filter the raw materials to avoid the impact of uneven particle size on the subsequent hot melting effect. The first drive motor 1104 drives the contact plate 1102 to rotate and contact the filter screen 1101, causing the filter screen 1101 to shake, thereby improving its filtration efficiency. The mounting plate 12 and the second compression spring 13 facilitate the installation of the filter screen 1101 and further increase its shaking amplitude, thereby improving the filtration effect.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A copper-plastic PPR pipe for home decoration, comprising: The inner copper tube (1) is characterized in that the inner copper tube (1) is extruded from the inside to the outside in the circumferential and longitudinal directions by an extrusion equipment (6) to form a heat insulation layer (2), a PPR layer (3), a noise reduction layer (4) and a reinforcing layer (5). The heat insulation layer (2) is made of ceramic fiber as the main raw material, refractory clay and silica raw materials as mixed raw materials, with 4 to 6 parts of ceramic fiber, 2 to 3 parts of refractory clay and 1 to 2 parts of silica raw materials. The noise reduction layer (4) is made of polyurethane foam as the main raw material and graphene as the mixed raw material, with 5-6 parts of polyurethane foam and 0.015-0.018 parts of graphene. The reinforcing layer (5) is made of glass fiber as the main raw material, resin as the matrix, and antioxidant and reinforcing fiber as mixed raw materials. The mixture consists of 3-5 parts glass fiber, 7-12 parts resin, 1-1.5 parts antioxidant, and 1.5-2 parts reinforcing fiber.

2. A method for preparing copper-plastic PPR pipes for home decoration, characterized in that, Includes the following steps: S1. Clean the outer surface of the inner copper tube (1) and preheat the inner copper tube (1); S2. Add the raw materials in the heat insulation layer (2) into the extrusion equipment (6) according to the weight ratio of 4-6 parts ceramic fiber, 2-3 parts refractory clay and 1-2 parts silica raw material, and extrude them onto the outer surface of the inner copper tube (1) by the extrusion equipment (6). After extrusion, cool and shape them. S3. The outer surface of the pipe obtained in step S2 is extruded with a PPR layer (3) and then cooled and molded. S4. Add the raw materials required for the noise reduction layer (4) into the extrusion equipment (6) according to the weight ratio of 5-6 parts of polyurethane foam and 0.015-0.018 parts of graphene. The extrusion equipment (6) will extrude the material onto the outer surface of the pipe obtained in step S3, and then cool and form it. S5. The raw materials required for the reinforcing layer (5) are added to the extrusion equipment (6) in the following weight ratios: 3-5 parts glass fiber, 7-12 parts resin, 1-1.5 parts antioxidant, and 1.5-2 parts reinforcing fiber. The extrusion equipment (6) then extrudes the material onto the outer surface of the pipe obtained in step S4 and cools it to form a solid shape. S6. Pull the pipes obtained in step S5 and cut them to a certain length. After cutting, inspect them. Pack the qualified pipes into the warehouse and recycle the unqualified pipes.

3. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 2, characterized in that, The extrusion equipment (6) includes a preheating component (14) for preheating and mixing raw materials, a quantitative feeding component (9) for quantitative feeding of raw materials, and a filtering component (11) for filtering unqualified raw materials. The preheating component (14), the quantitative feeding component (9) and the filtering component (11) are arranged sequentially from top to bottom along the axial direction on the extrusion equipment (6).

4. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 3, characterized in that, The preheating assembly (14) includes a feeding frame (1401), which is located above the extrusion equipment (6). A mounting shaft is rotatably connected to the top of the feeding frame (1401), and a drive gear (1402) is connected to the mounting shaft. A second drive motor (1403) that drives the drive gear (1402) is connected to the other end of the mounting shaft. A driven gear (1404) is meshed with one side of the drive gear (1402), and a stirring frame (1405) for stirring the raw materials is connected to the driven gear (1404). A second rotary joint (1407) and a first rotary joint (1408) are respectively connected to the top and bottom of the stirring frame (1405). 406), a water storage tank is provided in the mixing rack (1405), a water storage tank (1408) is connected to the top of the extrusion equipment (6), a water pump (1409) is connected to the water storage tank (1408), a heating plate (1410) for heating the water in the water storage tank (1408) is connected to one side of the water storage tank (1408), a first conveying pipe (1411) is connected to the water pump (1409), the other end of the first conveying pipe (1411) is connected to the first rotary joint (1406), a second conveying pipe (1412) is connected to the water storage tank (1408), and the other end of the second conveying pipe (1412) is connected to the second rotary joint (1407).

5. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 4, characterized in that, The mixing rack (1405) is connected to a feeding frame scraper (15), which abuts against the inner wall of the feeding frame (1401).

6. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 3, characterized in that, The quantitative feeding component (9) includes a mounting frame (901) connected to the top of the extrusion equipment (6). The top of the mounting frame (901) is connected to the bottom of the feeding frame (1401). A feeding frame (902) is connected inside the mounting frame (901). The top and bottom of the feeding frame (902) are respectively provided with inlet and outlet ports. A quantitative feeding frame (903) is rotatably installed inside the feeding frame (902). A drive for the quantitative feeding frame (903) is connected to the rear side of the feeding frame (902). The second servo motor (904) is activated. A slide plate (905) is slidably provided inside the quantitative feeding frame (903). A damper (906) is connected to the bottom of the slide plate (905). A first compression spring (907) is sleeved on the damper (906). One end of the first compression spring (907) is connected to the slide plate (905), and the other end is connected to the inner wall of the quantitative feeding frame (903). A contact control switch (908) for controlling the second servo motor (904) is connected inside the quantitative feeding frame (903).

7. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 6, characterized in that, Both sides of the quantitative feeding frame (903) are connected to a scraper (10) for feeding the frame, and the scraper (10) for feeding the frame abuts against the inner wall of the feeding frame (902).

8. The method for preparing a copper-plastic PPR pipe for home decoration according to claim 3, characterized in that, The filter assembly (11) includes a filter screen (1101), which is slidably disposed in the mounting frame (901). A contact plate (1102) is rotatably disposed in the mounting frame (901). A rotating shaft (1103) is connected to the contact plate (1102). A first drive motor (1104) for driving the rotating shaft (1103) to rotate is connected to the rear side of the mounting frame (901). Two symmetrical mounting plates (12) are connected in the mounting frame (901). A second compression spring (13) is connected to the top of the mounting plate (12). The top of the second compression spring (13) is connected to the bottom of the filter screen (1101). A collection box (1105) for collecting the filtered raw materials is connected to the top of the extrusion equipment (6).

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