Wear resistant spiral hose

Abstract

The utility model discloses a kind of wear-resistant spiral hose, comprising: polyurethane layer, hollow structure and can be supplied medium transport;Polyvinyl chloride layer, around polyurethane layer arrangement and with polyurethane layer integral connection;Reinforcing structure, set in polyvinyl chloride layer and for enhancing the rigidity of polyvinyl chloride layer. Through the synergic design of "inner wear-resistant material+intermediate flexible base material+reinforcing structure", while improving wear resistance, the problem that manufacturing cost rises greatly due to the fact that inner layer is all high-cost polyurethane material in traditional scheme is avoided, so that it is suitable for high pressure or heavy load working condition, both meet the long-term reliable use demand under high wear environment, and cost is controlled by structure optimization, significantly improve the market competitiveness and user experience of product.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to a wear-resistant spiral hose. Background Technology

[0002] In the field of industrial and civil fluid transportation, spiral hoses, as a type of flexible connecting pipe, are widely used in various scenarios such as urban water supply, sewage systems, farmland irrigation, coal mine and oilfield equipment, and marine machinery, and are responsible for transporting water, oil, chemical gases and media containing solid particles.

[0003] Currently, commonly used spiral flexible hoses on the market are typically made of polyvinyl chloride (PVC) as the base material, using a soft PVC pipe wall reinforced with a hardened PVC skeleton. In urban water supply systems, they can withstand a certain water pressure, delivering clean water to households; in sewage disposal, they can effectively discharge wastewater, ensuring urban environmental hygiene; in agricultural irrigation, they can deliver water to crops, supporting agricultural production; and in coal mines, oil fields, marine equipment, and other mechanical and electrical equipment, they can be used for conveying oil, chemical gases, and water, meeting the needs of different industrial scenarios.

[0004] However, when used in highly abrasive environments such as pumping gravel, sawdust, and cement slurry, the soft PVC pipe wall layer on its inner surface is prone to wear and perforation due to its relatively soft material. This is easily caused by continuous friction with rough particles like gravel, sawdust, and cement slurry. Once the pipe wall is perforated, it not only leads to leakage of the transported medium, affecting normal transport operations, but also significantly shortens the hose's lifespan, increasing operating costs and maintenance workload.

[0005] In some related technologies, rubber hoses have become a possible alternative to address the issue of inner layer wear. Rubber hoses possess good wear resistance and can resist abrasion from sand, wood chips, and cement slurry to a certain extent. However, the high production cost of rubber hoses makes them less price-competitive, increasing user costs. Furthermore, the heavy weight of rubber hoses requires more effort during installation and use, increasing the labor intensity for operators and reducing efficiency. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wear-resistant spiral hose, which achieves precise wear resistance through a polyurethane inner layer, a balanced flexibility and rigidity through a soft and hard PVC composite structure, and enhanced pressure and deformation resistance through a corrugated outer structure. It takes into account both lifespan in high-wear environments and low cost, solving the problems of easy perforation and bulkiness of traditional hoses, adapting to multiple working conditions, and improving reliability and economy.

[0007] A wear-resistant spiral hose according to an embodiment of the present invention includes: The polyurethane layer has a hollow structure and is capable of transporting media. A polyvinyl chloride layer is arranged around the polyurethane layer and integrally connected to the polyurethane layer; A reinforcing structure is provided on the polyvinyl chloride layer and is used to enhance the rigidity of the polyvinyl chloride layer.

[0008] According to an embodiment of this utility model, a wear-resistant spiral hose has at least the following beneficial effects: the innermost layer uses a polyurethane layer as the lining that directly contacts the conveying medium. Polyurethane itself has excellent wear resistance, effectively resisting the continuous friction and impact of highly abrasive particles such as sand, wood chips, and cement slurry. Compared with traditional all-PVC hoses, this significantly reduces the risk of wear and perforation, fundamentally solving the core problem of short service life of existing products in harsh environments such as sand, wood chips, and cement slurry. The middle layer is a soft polyvinyl chloride layer, which maintains the overall flexibility and bendability required for the hose, ensuring easy installation and adaptation to complex spatial arrangements. Furthermore, its integral connection with the inner polyurethane layer forms a stable... The transitional structure enhances interlayer bonding and avoids delamination risks. The reinforcing structure within the PVC layer specifically improves the hose's key mechanical properties, significantly enhancing radial support and resistance to flattening, making the hose less prone to deformation and collapse during high-pressure transport. The overall design, combining an inner wear-resistant material, a flexible intermediate substrate, and a reinforcing structure, improves wear resistance while avoiding the significant cost increases associated with traditional solutions that use high-cost polyurethane materials for the entire inner layer. This makes the hose suitable for high-pressure or heavy-load conditions, meeting the long-term reliable use requirements in high-wear environments while controlling costs through structural optimization, significantly enhancing the product's market competitiveness and user experience.

[0009] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the reinforcing structure includes a skeleton disposed within the polyvinyl chloride layer, and the hardness of the skeleton is greater than the hardness of the polyvinyl chloride layer.

[0010] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the cross-section of the skeleton is circular and the skeleton extends spirally along the axial direction of the polyvinyl chloride layer.

[0011] According to some embodiments of this utility model, a wear-resistant spiral hose is provided, wherein the polyvinyl chloride layer is a soft polyvinyl chloride component, the skeleton is a rigid polyvinyl chloride component, and the polyvinyl chloride layer and the skeleton are integrally co-extruded.

[0012] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the reinforcing structure includes a concave-convex configuration disposed on the outer periphery of the polyvinyl chloride layer.

[0013] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the concave-convex configuration is corrugated, and the outer edge of the polyvinyl chloride layer is a corrugated line on the radial cross section of the polyvinyl chloride layer.

[0014] According to some embodiments of the present invention, a wear-resistant spiral hose has a uniform outer diameter of the polyvinyl chloride layer along its axial direction.

[0015] According to some embodiments of this utility model, a wear-resistant spiral hose has a polyurethane layer with a thickness of A and a polyvinyl chloride layer with a thickness of B, satisfying: B≥3.5*A.

[0016] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the thickness of the polyurethane layer is between 1.5 mm and 3.5 mm.

[0017] According to some embodiments of the present invention, a wear-resistant spiral hose is provided, wherein the thickness of the polyvinyl chloride layer is between 6 mm and 20 mm.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional schematic diagram of a wear-resistant spiral hose according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of a wear-resistant spiral hose according to another embodiment of the present invention.

[0020] Explanation of icon numbers: Polyurethane layer 100; PVC layer 200; Skeleton 310; Concave-convex configuration 320. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] In the field of industrial and civil fluid transportation, spiral hoses, as a type of flexible connecting pipe, are widely used in various scenarios such as urban water supply, sewage systems, farmland irrigation, coal mine and oilfield equipment, and marine machinery, and are responsible for transporting water, oil, chemical gases and media containing solid particles.

[0027] Currently, commonly used spiral flexible hoses on the market are typically made of polyvinyl chloride (PVC) as the base material, using a soft PVC pipe wall reinforced with a hardened PVC skeleton. In urban water supply systems, they can withstand a certain water pressure, delivering clean water to households; in sewage disposal, they can effectively discharge wastewater, ensuring urban environmental hygiene; in agricultural irrigation, they can deliver water to crops, supporting agricultural production; and in coal mines, oil fields, marine equipment, and other mechanical and electrical equipment, they can be used for conveying oil, chemical gases, and water, meeting the needs of different industrial scenarios.

[0028] However, when used in highly abrasive environments such as pumping gravel, sawdust, and cement slurry, the soft PVC pipe wall layer on its inner surface is prone to wear and perforation due to its relatively soft material. This is easily caused by continuous friction with rough particles like gravel, sawdust, and cement slurry. Once the pipe wall is perforated, it not only leads to leakage of the transported medium, affecting normal transport operations, but also significantly shortens the hose's lifespan, increasing operating costs and maintenance workload.

[0029] In some related technologies, rubber hoses have become a possible alternative to address the issue of inner layer wear. Rubber hoses possess good wear resistance and can resist abrasion from sand, wood chips, and cement slurry to a certain extent. However, the high production cost of rubber hoses makes them less price-competitive, increasing user costs. Furthermore, the heavy weight of rubber hoses requires more effort during installation and use, increasing the labor intensity for operators and reducing efficiency.

[0030] Therefore, such as Figure 1 and Figure 2 As shown, this utility model proposes a wear-resistant spiral hose, comprising a hollow polyurethane layer 100 capable of transporting media, and a polyvinyl chloride (PVC) layer 200 arranged around and integrally connected to the polyurethane layer 100. Furthermore, the PVC layer 200 is reinforced to enhance its rigidity. It should be noted that the innermost layer, using polyurethane layer 100 as the liner directly contacting the transported media, possesses excellent wear resistance, effectively resisting continuous friction and impact from highly abrasive particles such as sand, wood chips, and cement slurry. Compared to traditional all-PVC hoses, this significantly reduces the risk of wear and perforation, fundamentally solving the core problem of short service life in harsh environments such as those involving sand, wood chips, and cement slurry. The middle layer is a soft PVC layer 200, maintaining the necessary flexibility and bendability for easy installation and adaptation to complex spatial arrangements. It also forms a stable transition structure through its integral connection with the inner polyurethane layer, enhancing interlayer bonding and preventing delamination. The reinforcing structure within the PVC layer 200 specifically enhances the hose's key mechanical properties, significantly increasing the radial support and anti-flattening capacity of the hose wall, making it less prone to deformation and collapse during high-pressure transport. The overall design, combining an inner wear-resistant material, a flexible intermediate substrate, and a reinforcing structure, improves wear resistance while avoiding the significant cost increases associated with traditional solutions that utilize high-cost polyurethane materials for the entire inner layer. This makes the hose suitable for high-pressure or heavy-load conditions, meeting the long-term reliable use requirements under high-wear environments while controlling costs through structural optimization, significantly enhancing the product's market competitiveness and user experience.

[0031] In reference Figure 1 and Figure 2 In some embodiments of this invention, the reinforcing structure includes a skeleton 310 disposed within the polyvinyl chloride layer 200, the skeleton 310 having a harderness than the polyvinyl chloride layer 200. Therefore, by introducing the rigid skeleton 310, the rigid support performance of the polyvinyl chloride layer 200 is significantly enhanced. It is understood that because the skeleton 310 has a higher hardness than the polyvinyl chloride layer 200, it can effectively suppress problems such as pipe wall collapse and radial deformation that occur under high-pressure transportation or external extrusion conditions. Especially when transporting high-pressure media such as cement slurry and gravel, the skeleton 310 can disperse local stress, preventing damage to the polyvinyl chloride layer 200 or the internal polyurethane layer 100 due to stress concentration. Optionally, the skeleton 310 has a circular cross-section, possessing uniform radial support characteristics, capable of dispersing the internal and external pressures on the pipe wall 360° circumferentially without dead angles, avoiding local stress concentration problems caused by irregular cross-sectional shapes, thereby more effectively enhancing the overall rigidity of the pipe wall. Furthermore, the skeleton 310 extends spirally along the axial direction of the PVC layer 200, which is highly compatible with the spiral forming process of the hose. For example, the PVC layer 200 is a flexible PVC component, and the skeleton 310 is a rigid PVC component, with the PVC layer 200 and the skeleton 310 being integrally co-extruded. In some applications, flexible and rigid PVC are extruded into the forming die head, and then polyurethane is extruded into the forming die head. After being formed by the spiral forming machine, it enters a water tank for cooling. From a processing perspective, the spiral skeleton 310 can be directly formed through a co-extrusion die, and the extension direction of the skeleton 310 is coordinated with the natural bending direction of the hose. When the hose bends, the spiral skeleton 310 can deform synchronously with the flexible PVC layer 200, providing rigid support without hindering the flexible bending of the hose due to excessive rigidity. This solves the defects of traditional straight skeletons 310, which are prone to stress fracture or restrict hose flexibility when bending. In addition, the materials of the skeleton 310 and the polyvinyl chloride layer 200 are consistent, which ensures the molecular-level bonding interface between the soft polyvinyl chloride layer 200 and the skeleton 310, avoiding potential problems such as delamination and peeling caused by material heterogeneity, such as structural failure that may be caused by the difference in thermal expansion coefficients of different materials.

[0032] Refer to Figure 2In some embodiments of this invention, the reinforcing structure includes a concave-convex configuration 320 disposed on the outer periphery of the polyvinyl chloride layer 200. It should be noted that by forming a non-smooth three-dimensional structure on the outer surface of the hose, the hose's resistance to axial bending, lateral compression, and external friction is significantly enhanced. When the hose is subjected to axial tension or bending, the crests and troughs of the concave-convex configuration 320 provide additional elastic support, dispersing stress concentration. For example, when laterally compressed by other objects, the three-dimensional shape of the concave-convex structure can absorb energy through deformation, preventing the hose wall from directly collapsing or rupturing. Furthermore, the outer periphery concave-convex configuration 320 can increase the coefficient of friction on the outer surface of the hose, facilitating gripping and securing during installation. Optionally, the concave-convex configuration 320 is corrugated, with the outer edge of the polyvinyl chloride layer 200 forming corrugated lines on its radial cross-section. Therefore, the corrugated concave-convex configuration 320 is one of the optimal embodiments of the outer periphery reinforcing structure, and its regular wavy cross-section design has clear mechanical advantages. The corrugated structure features continuous elastic support nodes formed by the crests and troughs in the axial direction. When the hose is subjected to axial tensile or bending forces, the corrugated structure disperses stress through its own elastic deformation, preventing stress concentration and subsequent pipe wall cracking. Similarly, under lateral pressure, the three-dimensional undulations of the corrugations absorb energy through compression deformation, significantly improving the hose's resistance to flattening. Furthermore, the outer surface of the corrugated structure possesses self-cleaning properties, preventing impurities from adhering during media flow, and the corrugations limit excessive rotation of the pipe body, further optimizing the hose's stability and durability under complex operating conditions.

[0033] In addition to the convex bone structure caused by the concave-convex configuration 320, in some embodiments of this utility model, such as Figure 1 As shown, the outer diameter of the PVC layer 200 is consistent along the axial direction, forming a flat bone structure. Through strict dimensional control, the product quality and reliability of the hose are improved, making it particularly suitable for industrial scenarios with high requirements for conveying accuracy and installation adaptability.

[0034] Optionally, such as Figure 1As shown, the thickness of the polyurethane layer 100 is A, and the thickness of the polyvinyl chloride layer 200 is B, satisfying B≥3.5*A, thus clarifying the reasonable ratio between the inner wear-resistant layer and the outer substrate. It is understandable that the polyurethane layer 100, as the liner directly contacting the conveying medium, needs sufficient thickness to resist wear, but excessive thickness would significantly increase material costs. The polyvinyl chloride layer 200, as the main structure, not only provides flexibility but also needs sufficient thickness to balance the rigidity requirements of the inner layer and support the reinforcing structure. The thickness ratio of B≥3.5*A ensures that the polyurethane layer 100 does not become excessively thick. While controlling overall costs, the polyvinyl chloride layer 200 can effectively wrap and protect the polyurethane layer 100, while providing sufficient substrate thickness for the reinforcing structure to ensure mechanical properties. Therefore, an optimal balance is achieved between wear resistance and structural strength, avoiding performance defects caused by a layer being too thin or too thick, further improving the economy and reliability of the hose. Specifically, in some embodiments of this utility model, the thickness of the polyurethane layer 100 is between 1.5mm and 3.5mm. The thinner polyurethane layer 100 (approximately 1.5 mm) reduces manufacturing costs in low to moderate wear conditions, while the thicker layer (approximately 3.5 mm) is suitable for extremely high wear scenarios. Users can flexibly adjust the thickness according to actual operating conditions. In some embodiments of this invention, the thickness of the polyvinyl chloride layer 200 is between 6 mm and 20 mm. It should be noted that the minimum thickness of 6 mm ensures the basic flexibility and economy of the hose under light load conditions, while the maximum thickness of 20 mm provides sufficient structural redundancy for harsh conditions such as high-pressure transmission and heavy-load friction. Parameter quantification improves the standardization level and quality controllability of the product, ensuring that the hose maintains reliable structural integrity and functional effectiveness in different application scenarios. The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A wear-resistant spiral hose, characterized in that, include: The polyurethane layer has a hollow structure and is capable of transporting media. A polyvinyl chloride layer is arranged around the polyurethane layer and integrally connected to the polyurethane layer; A reinforcing structure is provided on the polyvinyl chloride layer and is used to enhance the rigidity of the polyvinyl chloride layer.

2. The wear-resistant spiral hose according to claim 1, characterized in that: The reinforcing structure includes a skeleton disposed within the polyvinyl chloride layer, the skeleton having a harderness than the polyvinyl chloride layer.

3. The wear-resistant spiral hose according to claim 2, characterized in that: The skeleton has a circular cross-section and extends spirally along the axial direction of the polyvinyl chloride layer.

4. The wear-resistant spiral hose according to claim 2, characterized in that: The PVC layer is a flexible PVC component, the skeleton is a rigid PVC component, and the PVC layer and the skeleton are integrally co-extruded.

5. A wear-resistant spiral hose according to any one of claims 1 to 4, characterized in that: The reinforcing structure includes a concave-convex configuration disposed on the outer periphery of the polyvinyl chloride layer.

6. The wear-resistant spiral hose according to claim 5, characterized in that: The concave-convex configuration is corrugated, and the outer edge of the polyvinyl chloride layer is a corrugated line on the radial cross section of the polyvinyl chloride layer.

7. A wear-resistant spiral hose according to claim 1, characterized in that: The outer diameter of the polyvinyl chloride layer is consistent along its axial direction.

8. The wear-resistant spiral hose according to claim 1, characterized in that: The thickness of the polyurethane layer is A, and the thickness of the polyvinyl chloride layer is B, satisfying: B≥3.5*A.

9. A wear-resistant spiral hose according to claim 1 or 8, characterized in that: The thickness of the polyurethane layer is between 1.5 mm and 3.5 mm.

10. A wear-resistant spiral hose according to claim 1 or 8, characterized in that: The thickness of the polyvinyl chloride layer is between 6 mm and 20 mm.

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