Fireproof wear-resistant reinforced pipe

Abstract

The utility model provides a kind of fire-retardant wear-resistant reinforced pipe, belong to wear-resistant reinforced pipe technical field, this fire-retardant wear-resistant reinforced pipe includes pipe body main body, inner lining, outer protective layer and reinforcing rib strip;The pipe body main body is hollow cylindrical structure, the inner lining is closely attached to the inner wall surface of pipe body main body, the outer protective layer is coated in the outer wall surface of pipe body main body, the reinforcing rib strip extends along the axial direction of pipe body main body and is embedded in outer protective layer;The reinforcing rib strip is strip-shaped and is equally spaced along the circumferential direction of pipe body main body, the thickness of the reinforcing rib strip along the radial dimension of pipe body main body is less than the thickness of outer protective layer along the radial of pipe body main body;It can solve the technical problem that existing pipeline is difficult to realize collaborative optimization and long-term reliable service in fire-retardant wear-resistant reinforced and multiple performance dimensions.

Description

Technical Field

[0001] This utility model belongs to the field of wear-resistant reinforced pipe technology, specifically, it relates to a fire-retardant and wear-resistant reinforced pipe. Background Technology

[0002] In industrial sectors such as petrochemicals, power, energy, construction, and fire protection, pipeline systems serve as critical infrastructure for transporting various fluid media. Their safety performance and service life directly impact the stable operation of the entire production system and the safety of personnel and property. As industrial production evolves towards higher parameters, higher loads, and longer cycles, pipeline systems face increasingly harsh working environments. They must withstand the long-term effects of high-temperature, high-pressure, and corrosive media, endure physical damage such as external mechanical impacts and friction, and maintain structural integrity and functional effectiveness during emergencies like fires. Existing pipeline products primarily utilize pipe structures made from single materials. While selecting special materials can achieve better performance in certain dimensions, it's difficult to simultaneously meet multiple performance requirements such as fire resistance, flame retardancy, wear resistance, and reinforcement. Some technical solutions enhance pipeline performance by wrapping a protective layer or coating the outside of the pipe. However, the bonding strength between the wrapping layer or coating and the pipe body is low, making it prone to peeling or delamination during long-term use, resulting in loss of protection. Other technical solutions employ… While metal or fiber meshes are used as reinforcement structures inside pipes, these structures lack an effective stress transfer mechanism with the pipe material. Under external loads, the reinforcement fails to function effectively, and the metal mesh is prone to corrosion. For fire resistance, existing technologies primarily involve adding flame retardants to the pipe material or coating the outer surface with fire-retardant paint. However, adding flame retardants significantly reduces the mechanical strength of the pipe material, and fire-retardant paints are prone to cracking and peeling at high temperatures, failing to provide lasting fire protection. For wear resistance, existing technologies mainly involve increasing the hardness of the pipe material or coating the outer surface with a hard layer. However, excessive hardness reduces the pipe's toughness, making it susceptible to brittle fracture under impact. Furthermore, the bonding between the coating and the substrate limits the durability of wear resistance. Therefore, there is an urgent need for a pipe product that can achieve synergistic optimization of multiple properties, including fire resistance, flame retardancy, wear resistance, and reinforcement, through structural design and material selection to meet increasingly stringent industrial application requirements. Utility Model Content

[0003] In view of this, the present invention provides a fire-retardant, flame-retardant, and wear-resistant reinforced pipe, which can solve the technical problems of existing pipe products when facing multiple harsh working conditions such as exposure to high-temperature fire sources, long-term mechanical friction and wear, and complex external impacts. These problems are often caused by the weak bonding between the internal flame-retardant layer and the pipe body, leading to interlayer separation failure at high temperatures; or by the insufficient wear resistance of the external protective layer, leading to rapid wear and damage to the pipe surface; or by the lack of effective axial and radial reinforcement structures, causing the pipe to easily deform and break when subjected to external impacts and pressures. Existing pipes are unable to achieve synergistic optimization and long-term reliable service in multiple performance dimensions such as fire resistance, flame retardancy, wear resistance, and reinforcement.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a fire-retardant, flame-retardant, and wear-resistant reinforced pipe, comprising a pipe body, an inner lining, an outer protective layer, and reinforcing ribs. The pipe body has a hollow cylindrical structure. The inner lining is tightly fitted to the inner wall of the pipe body. The outer protective layer covers the outer wall of the pipe body. The reinforcing ribs extend axially along the pipe body and are embedded in the outer protective layer. The reinforcing ribs are strip-shaped and evenly distributed along the circumference of the pipe body. The thickness of the reinforcing ribs along the radial dimension of the pipe body is less than the thickness of the outer protective layer along the radial dimension of the pipe body. The inner lining is fixedly connected to the pipe body by vulcanization bonding, and the outer protective layer is fixedly connected to the pipe body by hot-pressing composite bonding.

[0006] The technical effects of the fire-retardant and wear-resistant reinforced pipe provided by this utility model are as follows: By tightly adhering the inner lining layer to the inner wall of the pipe body and fixing it with vulcanization bonding, the inner lining layer and the pipe body form an integrated structure, effectively improving the sealing performance and flame-retardant performance of the pipe interior; by covering the outer wall of the pipe body with the outer protective layer and fixing it with the hot-press composite method, the outer protective layer and the pipe body are tightly bonded, significantly enhancing the wear resistance of the pipe exterior; by extending the reinforcing ribs along the axial direction of the pipe body and embedding them in the outer protective layer and distributing them at equal intervals along the circumference, the pipe body can disperse stress through the reinforcing ribs when subjected to external pressure and impact, greatly improving the overall compressive strength and structural stability of the pipe, and effectively preventing deformation or rupture of the pipe during use.

[0007] Based on the above technical solution, the fireproof, flame-retardant, and wear-resistant reinforced tube of this utility model can be further improved as follows:

[0008] The reinforcing rib has a rectangular cross-section, and its length along the axial direction of the main body of the pipe is equal to the total axial length of the main body of the pipe.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the cross-section of the reinforcing rib rectangular and the length along the axial direction of the main body of the pipe equal to the total length of the main body of the pipe, the reinforcing rib can provide continuous and uniform reinforcement support throughout the entire length of the pipe, avoiding local stress concentration caused by insufficient length of the reinforcing rib, ensuring that the pipe has consistent mechanical strength and impact resistance throughout the entire length. At the same time, the rectangular cross-section structure facilitates the formation of a stable interlocking relationship between the reinforcing rib and the outer protective layer, improving the bonding strength between the reinforcing rib and the outer protective layer.

[0010] Furthermore, the thickness of the inner lining layer is uniformly distributed along the radial direction of the pipe body, and the ratio of the thickness of the inner lining layer along the radial direction of the pipe body to the wall thickness of the pipe body is between 1:3 and 1:5.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the thickness of the inner lining layer uniformly distributed along the radial direction of the pipe body and controlling the ratio of the radial thickness of the inner lining layer to the wall thickness of the pipe body within a reasonable range, the inner lining layer can provide sufficient flame retardant protection without excessively increasing the overall weight and manufacturing cost of the pipeline. The uniformly distributed thickness of the inner lining layer ensures that the flame retardant performance is consistent throughout the inner wall of the pipeline, avoiding localized weak flame retardant areas caused by uneven thickness. At the same time, the reasonable thickness ratio ensures that the bonding interface between the inner lining layer and the pipe body is subjected to uniform stress, reducing the risk of interlayer delamination caused by thermal expansion and contraction.

[0012] Furthermore, the outer surface of the outer protective layer is provided with multiple annular raised lines, which are evenly distributed along the axial direction of the tube body, and the raised height of each annular raised line along the radial direction of the tube body is the same.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting multiple annular ridges evenly distributed along the axial direction of the pipe body on the outer surface of the outer protective layer, and with each annular ridge having the same radial protrusion height, a regular friction-enhancing structure is formed on the outer surface of the pipe. This significantly improves the friction coefficient and gripping ability between the pipe and the external contact surface, effectively preventing the pipe from slipping or rotating during installation or use. At the same time, the annular ridge structure increases the actual contact area of ​​the outer surface of the pipe, improves the wear resistance of the outer protective layer, and extends the service life of the pipe. The evenly distributed ridges can also disperse stress when the pipe is subjected to radial pressure, enhancing the pipe's pressure resistance.

[0014] Furthermore, the number of reinforcing ribs distributed in the circumferential direction of the tube body is 8 to 12, and the circumferential angle between two adjacent reinforcing ribs is equal.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by controlling the number of reinforcing ribs distributed in the circumferential direction of the pipe body within a reasonable range and ensuring that the circumferential angle between two adjacent reinforcing ribs is equal, the reinforcing ribs form a uniform and symmetrical reinforcing distribution pattern in the circumferential direction of the pipe. This ensures that the pipe can obtain balanced support and reinforcement when subjected to external loads from any direction, avoiding local strength deficiency or stress concentration caused by uneven distribution of reinforcing ribs. At the same time, the equally spaced reinforcing ribs ensure that the rigidity of the pipe remains consistent in the radial direction, effectively preventing elliptical deformation of the pipe during use.

[0016] Furthermore, the width of the reinforcing rib along the circumference of the tube body is greater than the thickness of the reinforcing rib along the radial direction of the tube body, and the two sides of the reinforcing rib are smoothly connected to the contact surface of the outer wall of the tube body.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the width of the reinforcing rib along the circumference of the main body of the pipe larger than the thickness of the reinforcing rib along the radial direction, and by making the contact surfaces of the two sides of the reinforcing rib and the outer wall of the main body of the pipe smoothly transition, the reinforcing rib has a larger contact area and forms a stable bond with the outer wall of the main body of the pipe. This enhances the supporting effect and load transfer capacity of the reinforcing rib on the pipe. The smooth transition connection structure effectively eliminates stress concentration points and reduces the risk of fatigue failure at the joint between the reinforcing rib and the pipe. At the same time, the larger width gives the reinforcing rib better bending stiffness in the circumferential direction, improving the overall torsional resistance of the pipeline.

[0018] Furthermore, the cross-section of the annular convex pattern is trapezoidal, the top width of the annular convex pattern is smaller than the bottom width of the annular convex pattern, and the distance between two adjacent annular convex patterns along the axial direction of the tube body is 2 to 3 times the bottom width of the annular convex pattern.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by making the cross-section of the annular embossed pattern trapezoidal with a top width smaller than the bottom width and controlling the axial spacing between two adjacent annular embossed patterns within a reasonable range, the annular embossed pattern has good wear resistance and stress dispersion ability. The wider bottom design of the trapezoidal structure increases the bonding area between the annular embossed pattern and the outer protective layer substrate, improving the shear strength and non-detachment performance of the annular embossed pattern. The narrower top design reduces the wear contact area of ​​the annular embossed pattern during use, extending the effective service life of the pattern. The reasonable axial spacing ensures that adjacent embossed patterns can provide sufficient friction enhancement without reducing the material strength between the embossed patterns due to excessively small spacing.

[0020] Furthermore, the inner lining is made of flame-retardant rubber material, the tube body is made of reinforced polymer material, the outer protective layer is made of wear-resistant polyurethane material, and the reinforcing ribs are made of glass fiber reinforced material.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using flame-retardant rubber material for the inner lining, reinforced polymer material for the main body of the pipe, wear-resistant polyurethane material for the outer protective layer, and glass fiber reinforced material for the reinforcing ribs, the material properties of each component of the pipeline are precisely matched with their functional requirements. The flame-retardant rubber material provides excellent flame-retardant and sealing performance for the inner lining, the reinforced polymer material provides good mechanical strength and chemical stability for the main body of the pipe, the wear-resistant polyurethane material provides excellent wear resistance and anti-aging performance for the outer protective layer, and the glass fiber reinforced material provides high strength and high modulus characteristics for the reinforcing ribs. The reasonable combination of multiple materials enables the pipeline to simultaneously possess multiple functional characteristics such as fire resistance, flame retardancy, wear resistance, and reinforcement.

[0022] Furthermore, the two end faces of the main body of the tube are planar structures perpendicular to the axis of the main body of the tube, the inner lining layer is flush with the end faces of the main body of the tube at both ends, and the outer protective layer extends beyond the end faces of the main body of the tube at both ends to form an edge-wrapping structure.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using flame-retardant rubber material for the inner lining, reinforced polymer material for the main body of the pipe, wear-resistant polyurethane material for the outer protective layer, and glass fiber reinforced material for the reinforcing ribs, the material properties of each component of the pipeline are precisely matched with their functional requirements. The flame-retardant rubber material provides excellent flame-retardant and sealing performance for the inner lining, the reinforced polymer material provides good mechanical strength and chemical stability for the main body of the pipe, the wear-resistant polyurethane material provides excellent wear resistance and anti-aging performance for the outer protective layer, and the glass fiber reinforced material provides high strength and high modulus characteristics for the reinforcing ribs. The reasonable combination of multiple materials enables the pipeline to simultaneously possess multiple functional characteristics such as fire resistance, flame retardancy, wear resistance, and reinforcement.

[0024] Furthermore, the embedding depth of the reinforcing rib in the outer protective layer is 2 / 3 to 4 / 5 of the thickness of the reinforcing rib, there is a continuous material transition layer between the outer surface of the reinforcing rib and the outer surface of the outer protective layer, and the length of the edging structure extending along the axial direction of the pipe body is 1 to 2 times the wall thickness of the pipe body.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By controlling the embedding depth of the reinforcing rib in the outer protective layer within a reasonable range, and by ensuring a continuous material transition layer between the outer surface of the reinforcing rib and the outer surface of the outer protective layer, and by controlling the axial extension length of the edging structure within a reasonable range, a strong and reliable interlocking structure is formed between the reinforcing rib and the outer protective layer. The reasonable embedding depth ensures the effective support of the reinforcing rib for the pipe body while avoiding corrosion or damage caused by the complete exposure of the reinforcing rib. The continuous material transition layer eliminates the interface abrupt change between the reinforcing rib and the outer protective layer, significantly improving the bonding strength and stress transfer efficiency between the two. The reasonable length of the edging structure provides sufficient protection for the pipe end, effectively preventing moisture and corrosive media from invading the pipe body from the end, thus extending the overall service life of the pipe.

[0026] Compared with existing technologies, the beneficial effects of the fire-retardant and wear-resistant reinforced pipe provided by this utility model are as follows: This utility model, by tightly bonding the inner lining layer to the inner wall of the pipe body and fixing it using a vulcanization bonding method, forms a chemically bonded integrated structure between the inner lining layer and the pipe body, fundamentally solving the problem of interlayer separation failure under high-temperature environments. The flame-retardant rubber material used in the inner lining layer can form a dense carbonized protective layer under direct flame action, effectively blocking the transfer of heat to the pipe body and significantly improving the overall fire-retardant performance of the pipe. By covering the outer wall of the pipe body with an outer protective layer and fixing it using a hot-press composite method, the wear-resistant polyurethane material used in the outer protective layer forms a tight physical and chemical bond with the pipe body. The outer protective layer can withstand long-term mechanical friction and impact without peeling or damage, greatly extending the service life of the pipe. By using glass... Reinforcing ribs made of glass fiber reinforced material extend axially along the main body of the pipe and are embedded in the outer protective layer, with equal spacing along the circumference. This significantly enhances the strength of the pipe in both the axial and radial directions. The reinforcing ribs effectively disperse and transfer external loads, preventing local failure of the pipe under complex stress conditions. By setting an annular embossed structure on the outer surface of the outer protective layer, the anti-slip capability and wear resistance of the pipe are further enhanced. This utility model organically unifies multiple functions such as fire resistance, flame retardancy, wear resistance, and reinforcement through reasonable structural design and material selection. Compared with existing technologies that require multi-layered complex structures or additional protective devices, this utility model has a simple and reasonable structure, and the synergistic effect between the components is significant. It can achieve long-term reliable service in harsh working conditions such as petrochemical transportation of high-temperature corrosive media and fire-fighting water supply systems, and has significant technological progress and practical value. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the cross-sectional structure of a fire-retardant, flame-retardant, and wear-resistant reinforced pipe.

[0029] Figure 2 This is a schematic diagram of the vertical cross-section structure of a fire-retardant, flame-retardant, and wear-resistant reinforced pipe.

[0030] Figure 3 This is a schematic diagram of the outer surface structure of the outer protective layer;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Pipe body; 20. Inner lining layer; 30. Outer protective layer; 40. Reinforcing ribs. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows a structural schematic of a fire-retardant, flame-retardant, and wear-resistant reinforced pipe provided by this utility model. The pipe includes a main body 10, an inner lining 20, an outer protective layer 30, and reinforcing ribs 40. The main body is a hollow cylindrical structure. The inner lining is tightly fitted to the inner wall of the main body, and the outer protective layer covers the outer wall of the main body. The reinforcing ribs extend axially along the main body and are embedded in the outer protective layer. The reinforcing ribs are strip-shaped and evenly distributed along the circumference of the main body. The thickness of the reinforcing ribs along the radial direction of the main body is less than the thickness of the outer protective layer along the radial direction of the main body. The inner lining is fixedly connected to the main body by vulcanization bonding, and the outer protective layer is fixedly connected to the main body by hot-pressing composite bonding.

[0035] In the above technical solution, the cross-section of the reinforcing rib is rectangular, and the length of the reinforcing rib along the axial direction of the main body of the pipe is equal to the total length of the main body of the pipe along the axial direction.

[0036] Furthermore, in the above technical solution, the thickness of the inner lining layer is uniformly distributed along the radial direction of the pipe body, and the ratio of the thickness of the inner lining layer along the radial direction of the pipe body to the wall thickness of the pipe body is between 1:3 and 1:5.

[0037] Furthermore, in the above technical solution, the outer surface of the outer protective layer is provided with multiple annular raised lines. The annular raised lines are evenly distributed along the axial direction of the main body of the pipe, and the raised height of each annular raised line along the radial direction of the main body of the pipe is the same.

[0038] Furthermore, in the above technical solution, the number of reinforcing ribs distributed in the circumferential direction of the main body of the pipe is 8 to 12, and the circumferential included angle between two adjacent reinforcing ribs is equal.

[0039] Furthermore, in the above technical solution, the width of the reinforcing rib along the circumferential direction of the main body of the pipe is greater than the thickness of the reinforcing rib along the radial direction of the main body of the pipe, and the two sides of the reinforcing rib are smoothly connected to the contact surface of the outer wall of the main body of the pipe.

[0040] Furthermore, in the above technical solution, the cross-section of the annular convex pattern is trapezoidal, the top width of the annular convex pattern is smaller than the bottom width of the annular convex pattern, and the distance between two adjacent annular convex patterns along the axial direction of the tube body is 2 to 3 times the bottom width of the annular convex pattern.

[0041] Furthermore, in the above technical solution, the inner lining is made of flame-retardant rubber material, the main body of the pipe is made of reinforced polymer material, the outer protective layer is made of wear-resistant polyurethane material, and the reinforcing ribs are made of glass fiber reinforced material.

[0042] Furthermore, in the above technical solution, the two end faces of the main body of the pipe are planar structures perpendicular to the axis of the main body of the pipe, the inner lining layer is flush with the end faces of the main body of the pipe at both ends, and the outer protective layer extends beyond the end faces of the main body of the pipe at both ends to form an edge-wrapping structure.

[0043] Furthermore, in the above technical solution, the embedding depth of the reinforcing rib in the outer protective layer is 2 / 3 to 4 / 5 of the thickness of the reinforcing rib, there is a continuous material transition layer between the outer surface of the reinforcing rib and the outer surface of the outer protective layer, and the length of the edge-wrapping structure extending along the axial direction of the pipe body is 1 to 2 times the wall thickness of the pipe body.

[0044] The following is a specific embodiment 1 of this utility model: This embodiment provides a fire-retardant and wear-resistant reinforced pipe for conveying high-temperature corrosive media in petrochemical plants. The main body of the pipe is made of a reinforced polymer material with an inner diameter of 100mm and an outer diameter of 120mm. This reinforced polymer material is made of polyetheretherketone resin as the matrix material, in which 30% of short-cut carbon fibers are uniformly dispersed by volume. It is prepared into a hollow cylindrical structure by injection molding. The inner lining layer is made of a flame-retardant rubber material with a thickness of 5mm. This flame-retardant rubber material is made of EPDM rubber as the base rubber and contains a mass fraction of [missing information - likely a percentage]. A lining layer consisting of 25% aluminum hydroxide flame retardant and 10% magnesium hydroxide flame retardant is bonded tightly to the inner wall of the pipe body using a vulcanization bonding process. The vulcanization temperature is 160℃, the vulcanization time is 30 minutes, and the vulcanization pressure is 2MPa. After vulcanization, the peel strength between the lining layer and the pipe body reaches 12N per mm. The outer protective layer is made of 8mm thick wear-resistant polyurethane material. This polyurethane material is a polyether-type polyurethane elastomer with a Shore hardness of 85A, a tensile strength of 35MPa, and an elongation at break of 450%. The outer protective layer is then applied to the outer wall of the pipe body using a hot-pressing composite process. The outer protective layer is hot-pressed at 180℃ for 20 minutes at a pressure of 3MPa. Every 50mm along the axial direction of the main body of the tube, an annular raised rib is provided on the outer surface of the outer protective layer. The cross-section of the annular raised rib is trapezoidal, with a bottom width of 10mm, a top width of 4mm, and a height of 3mm. The reinforcing ribs are made of 15mm wide and 2mm thick glass fiber reinforced material, which is produced by hot-pressing and curing continuous glass fiber cloth impregnated with epoxy resin. The tensile strength is 800MPa, and the elastic modulus is 40GPa. The length of the reinforcing ribs along the axial direction of the main body of the tube is 100mm. The length of the pipe body is 0mm, which is equal to the total length of the main body. Ten reinforcing ribs are evenly spaced along the circumference of the main body. The circumferential angle between two adjacent reinforcing ribs is 36 degrees. The reinforcing ribs are embedded in the outer protective layer to a depth of 1.5mm. There is a 0.5mm thick polyurethane material transition layer between the outer surface of the reinforcing ribs and the outer surface of the outer protective layer. The outer protective layer extends 15mm beyond the end face of the main body at both ends to form an edge-wrapping structure. The ends of the edge-wrapping structure are folded inward and tightly fitted to the end face of the main body. The fire-retardant and wear-resistant reinforced pipe of this embodiment can be used to transport materials at a temperature of 180℃ and a pressure of 1.The pipeline is installed in a high-temperature area of ​​a chemical plant, where the ambient temperature is 80°C and there is frequent mechanical friction caused by equipment vibration and personnel movement. During use, the flame-retardant rubber material of the inner lining effectively isolates the pipe body from thermal damage caused by the high-temperature medium, keeping the pipe body temperature below 120°C. The wear-resistant polyurethane material of the outer protective layer withstands long-term mechanical friction, and the annular convex structure effectively prevents the pipeline from slipping on the supports. The cage-like reinforcement structure with reinforcing ribs ensures that the pipeline maintains good roundness when subjected to equipment vibration and internal pressure, with radial deformation less than the pipe's normal operating temperature. After 6 months of continuous operation, an inspection revealed only slight wear marks on the surface of the outer protective layer, with the wear depth of the annular ridges less than 0.5 mm. The pipe as a whole showed no significant deformation or damage. No delamination was observed between the inner lining and the main pipe body. The interface between the outer protective layer and the main pipe body remained intact. No reinforcing ribs broke or detached from the outer protective layer. This embodiment fully verifies the reliability and durability of the fire-retardant, wear-resistant, and reinforced pipe of this invention in the transportation of high-temperature corrosive media and harsh external environments, proving the effectiveness of the multi-layer composite structure design and the rational configuration of functional materials.

[0045] The following is another specific embodiment 2 of this utility model: This embodiment 2 is an optimization and improvement based on embodiment 1, specifically for the application scenario of fire-fighting water supply systems. The reinforcing polymer material of the main body of the pipe is changed from polyetheretherketone resin-based carbon fiber reinforcement material to polyphenylene sulfide resin-based glass fiber reinforcement material, with a glass fiber volume fraction of 35%. This material has better hydrolysis resistance and lower cost. 5% red phosphorus flame retardant is added to the flame-retardant rubber material of the inner lining, enabling the inner lining to form an expanded carbon layer more quickly under flame action, improving the flame-retardant effect by approximately 20%. The spacing of the annular ridges on the outer surface of the outer protective layer is reduced from 50mm to 30mm, and the number of ridges... The quantity is increased accordingly, giving the pipe better anti-slip ability and surface protection during the running or dragging of fire trucks. The number of reinforcing ribs is increased from 10 to 12, and the circumferential angle between adjacent reinforcing ribs is reduced to 30 degrees, giving the pipe higher impact resistance and the ability to withstand accidental impact loads at fire rescue sites. The extension length of the edging structure is increased from 15mm to 25mm, and a rubber sealing ring is added to the inside of the edging structure, further improving the sealing and waterproof performance of the pipe ends. The fire-resistant, flame-retardant, and wear-resistant reinforced pipe of this embodiment is particularly suitable for applications such as building fire water supply systems and outdoor fire pipe networks that require simultaneous fire resistance, wear resistance, impact resistance, and rapid deployment.

[0046] The following is another specific embodiment 3 of this utility model: This embodiment 3 is an optimization and improvement based on embodiment 1, specifically for the application scenario of a mining conveying system. The Shore hardness of the wear-resistant polyurethane material of the outer protective layer is increased from 85A to 95A, and the tensile strength is increased to 45MPa, giving the outer protective layer higher wear resistance and cutting resistance, enabling it to withstand the severe abrasion of sand and gravel particles in the mining environment. The bottom width of the trapezoidal cross-section of the annular convex pattern is increased to 15mm, and the height of the convex pattern is increased to 5mm, giving the convex pattern a larger contact area and better wear resistance life. The thickness of the reinforcing ribs is increased from 2mm to 3mm, and the width is increased from 15mm to 20mm, giving the reinforcing ribs higher bending stiffness and impact resistance, enabling them to withstand the impact of ore or equipment. To mitigate the concentrated loads generated by external impacts, the depth of the reinforcing ribs embedded in the outer protective layer is increased to 2mm to ensure sufficient embedding depth between the reinforcing ribs and the outer protective layer. The thickness of the inner lining layer is increased from 5mm to 8mm, further enhancing the wear resistance of the pipe's inner wall and its resistance to solid particles in the transported medium. A 1mm thick buffer rubber layer, made of nitrile rubber, is added between the pipe body and the inner lining layer to absorb the energy generated by the impact of solid particles and reduce the stress peak at the interface between the inner lining layer and the pipe body. The fire-retardant and wear-resistant reinforced pipe of this embodiment is particularly suitable for applications such as mining slurry transport and coal mine drainage systems that require resistance to highly abrasive media and harsh mechanical environments. Compared with Embodiment 1, it has a longer service life and higher reliability.

[0047] Specifically, the principle of this utility model is as follows: The core technical principle of this utility model lies in achieving synergistic optimization of fire resistance, flame retardancy, wear resistance, and enhanced performance through multi-layer composite structure design and rational configuration of functional materials. The inner lining layer uses flame-retardant rubber material and is fixedly connected to the inner wall of the pipe body through vulcanization bonding. During the vulcanization bonding process, the molecular chains of the flame-retardant rubber material and the molecular chains of the pipe body material undergo a cross-linking reaction, forming a transitional cross-linked network structure at the interface between the two. This chemical bonding mechanism makes the bonding strength between the inner lining layer and the pipe body much higher than that of simple physical bonding, and can withstand the thermal stress under high temperature environment without interlayer separation. The flame-retardant components contained in the flame-retardant rubber material can undergo an endothermic decomposition reaction and release non-flammable gases when heated, while forming a dense expanded carbon layer on the material surface. This carbonized layer has excellent heat insulation performance, which can effectively block the transfer of external heat to the pipe body and significantly reduce the temperature rise rate of the pipe body, thereby protecting the structural integrity of the pipeline in a fire environment; the pipe body is made of reinforced polymer. The material is made of reinforced polymer materials, which form a composite material structure in which the continuous phase matrix and the dispersed phase reinforcement are uniformly dispersed in the polymer matrix. This structure enables the pipe body to maintain good toughness while having high mechanical strength and stiffness, and can withstand large internal pressure and external mechanical loads. The outer protective layer is made of wear-resistant polyurethane material and is fixedly connected to the outer wall of the pipe body through hot pressing. During the hot pressing process, the polyurethane material softens under heating conditions and penetrates into the micropores and rough structure of the outer surface of the pipe body under pressure. After cooling and solidification, a tight interface combining mechanical interlocking and molecular diffusion is formed. The polyurethane material has excellent properties such as high elasticity, high wear resistance and high tear resistance, which can effectively resist external friction, wear and impact. The annular convex structure set on the outer surface of the outer protective layer increases the actual contact area and friction coefficient between the pipe and the external contact surface. The trapezoidal cross-section of the convex structure gives the convex structure good stress dispersion ability and avoids stress concentration at the root of the convex structure.The reinforcing ribs are made of glass fiber reinforced material and extend axially along the main body of the pipe, embedded in the outer protective layer. Glass fiber material is characterized by high strength, high modulus, and low density. The reinforcing ribs are evenly distributed along the circumference, forming a cage-like reinforcing structure. When the pipe is subjected to radial external force, the reinforcing ribs can effectively restrain the radial deformation of the main body of the pipe. When the pipe is subjected to axial tensile force or bending load, the reinforcing ribs can share part of the load and transfer the load to the main body of the pipe through the interfacial shearing action between the reinforcing ribs and the outer protective layer. The structural design of the reinforcing ribs embedded in the outer protective layer ensures that the reinforcing ribs are protected by the outer protective layer material, avoiding... This design avoids direct exposure of reinforcing ribs to the external environment, preventing corrosion or mechanical damage. The continuous material transition layer between the reinforcing ribs and the outer protective layer eliminates abrupt interface changes, allowing for smooth stress transfer. Through the synergistic effect of the aforementioned multi-layered composite structure and functional materials, this invention achieves fire-retardant performance from the heat-insulating and flame-retardant function of the inner lining layer, wear resistance from the highly wear-resistant material and textured structure of the outer protective layer, and reinforcement performance from the reinforcing polymer material of the pipe body and the cage-like reinforcement structure of the reinforcing ribs. Each performance dimension is independent yet mutually supportive, resulting in a high-performance, structurally sound, fire-retardant, and wear-resistant reinforced pipe product.

[0048] Before use, select a fire-retardant, wear-resistant reinforced pipe with appropriate specifications and material formula based on the actual parameters of the conveyed medium, such as temperature, pressure, and corrosiveness. Check that both ends of the pipe are flat, clean, and undamaged, and that the outer protective layer is intact and undamaged. When moving the pipe to the installation location, avoid dragging or throwing it to prevent impact damage to the outer protective layer and reinforcing ribs. During installation, align both ends of the pipe with the connecting flanges of adjacent pipes or equipment, ensuring that the pipe axis is concentric with the connecting flange axis. Place a suitable sealing gasket between the flanges and tighten the connecting bolts evenly according to the specified torque value. After installation, perform a pressure test on the pipeline system to check for leaks at the pipe connections. During normal use, periodically check the annular ridges on the outer surface of the pipe for obvious wear, check for cracks or peeling of the outer protective layer, and check the pipe for any other defects. If abnormal deformation is found, special attention should be paid to checking the inner lining of pipes installed in high-temperature environments or near fire sources. For pipes subjected to frequent mechanical friction, the wear of the outer protective layer should be checked. If the wear depth of the outer protective layer exceeds one-third of the total thickness of the outer protective layer, the pipe should be replaced. If obvious deformation or cracks are found in the pipe, it should be stopped immediately and the pipe replaced. When used in cold environments, attention should be paid to the antifreeze and heat preservation measures for the medium inside the pipe to avoid damage to the inner lining due to repeated freeze-thaw cycles. When used in corrosive environments, the outer protective layer should be checked regularly for corrosion marks. If necessary, additional anti-corrosion protection measures can be added to the outer surface of the pipe. After the pipe is not in use, the medium inside the pipe should be drained, the inner wall of the pipe should be cleaned, and it should be stored in a dry and ventilated environment to avoid long-term exposure to direct sunlight or high-temperature environments, which may cause material aging.

Claims

1. A fire-retardant, flame-retardant, and wear-resistant reinforced pipe, characterized in that, The device includes a main body, an inner lining, an outer protective layer, and reinforcing ribs. The main body is a hollow cylindrical structure. The inner lining is tightly fitted to the inner wall of the main body. The outer protective layer covers the outer wall of the main body. The reinforcing ribs extend axially along the main body and are embedded in the outer protective layer. The reinforcing ribs are strip-shaped and evenly distributed along the circumference of the main body. The thickness of the reinforcing ribs along the radial direction of the main body is less than the thickness of the outer protective layer along the radial direction of the main body. The inner lining is fixedly connected to the main body by vulcanization bonding, and the outer protective layer is fixedly connected to the main body by hot-pressing composite bonding.

2. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 1, characterized in that, The cross-section of the reinforcing rib is rectangular, and the length of the reinforcing rib along the axial direction of the main body of the pipe is equal to the total axial length of the main body of the pipe.

3. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 2, characterized in that, The thickness of the inner lining layer is uniformly distributed along the radial direction of the main body of the pipe, and the ratio of the thickness of the inner lining layer along the radial direction of the main body of the pipe to the wall thickness of the main body of the pipe is between 1:3 and 1:

5.

4. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 3, characterized in that, The outer surface of the outer protective layer is provided with multiple annular raised lines. The annular raised lines are evenly distributed along the axial direction of the tube body, and the raised height of each annular raised line is the same along the radial direction of the tube body.

5. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 4, characterized in that, The number of reinforcing ribs distributed in the circumferential direction of the main body of the pipe is 8 to 12, and the circumferential included angle between two adjacent reinforcing ribs is equal.

6. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 5, characterized in that, The width of the reinforcing rib along the circumference of the tube body is greater than the thickness of the reinforcing rib along the radial direction of the tube body, and the two sides of the reinforcing rib are smoothly connected to the contact surface of the outer wall of the tube body.

7. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 6, characterized in that, The cross-section of the annular convex pattern is trapezoidal, the top width of the annular convex pattern is smaller than the bottom width of the annular convex pattern, and the distance between two adjacent annular convex patterns along the axial direction of the tube body is 2 to 3 times the bottom width of the annular convex pattern.

8. The fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 7, characterized in that, The inner lining is made of flame-retardant rubber material, the main body of the tube is made of reinforced polymer material, the outer protective layer is made of wear-resistant polyurethane material, and the reinforcing ribs are made of glass fiber reinforced material.

9. A fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 8, characterized in that, The two end faces of the main body of the pipe are planar structures perpendicular to the axis of the main body of the pipe. The inner lining layer is flush with the end faces of the main body of the pipe at both ends. The outer protective layer extends beyond the end faces of the main body of the pipe at both ends to form an edge-wrapping structure.

10. A fire-retardant, flame-retardant, and wear-resistant reinforced pipe according to claim 9, characterized in that, The embedding depth of the reinforcing rib in the outer protective layer is 2 / 3 to 4 / 5 of the thickness of the reinforcing rib. There is a continuous material transition layer between the outer surface of the reinforcing rib and the outer surface of the outer protective layer. The length of the edging structure extending along the axial direction of the pipe body is 1 to 2 times the wall thickness of the pipe body.

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