PVC (polyvinyl chloride) hose with multi-layer composite structure
By designing a multi-layer composite structure and optimizing the layer thickness and helix angle of the PVC hose, the problems of insufficient anti-torsion and anti-pressure explosion-proof performance have been solved, achieving better anti-pressure explosion-proof effect and anti-torsion performance, while improving surface wear resistance and recognizability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2026-03-24
AI Technical Summary
Existing PVC hoses lack sufficient resistance to torsion, pressure and explosion in high-pressure and long-distance operating environments, and their simple fiber-reinforced mesh structure leads to loose connections and easy delamination.
It adopts a multi-layer composite structure design, including a polyvinyl chloride inner layer, a middle layer and an outer layer. The middle layer is interwoven with a double braided reinforcement layer, and the first and second winding braided layers form a grid structure. The outer layer is provided with a wear-resistant ray layer. The thickness and helix angle of each layer are optimized to enhance the compressive and torsional resistance.
It improves the pressure resistance, explosion-proof performance, and torsion resistance of PVC hoses, extends their service life, and enhances surface wear resistance and visibility through a wear-resistant ray layer, adapting to the needs of different wear scenarios.
Smart Images
Figure CN224033270U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of hose, especially to PVC hose of multilayer composite structure. BACKGROUND
[0002] PVC hose is a kind of flexible pipeline with polyvinyl chloride resin as main raw material, adding plasticizer, stabilizer, lubricant and various kinds of additives, is made by extrusion process, is generally used to transport fluid or gas, by its low cost, performance variety, processing convenient advantage, has been widely applied in industry, agriculture, building, home and medical multiple fields.
[0003] Because PVC material has certain flexibility, PVC hose is easy to twist and deform when subjected to external force in actual use, and twist and burst conditions occur, therefore, fiber reinforced net is usually compounded on PVC hose, which can enhance the overall hardness of PVC hose, but the existing fiber reinforced net structure is simple, and it is difficult to provide the anti-twist and anti-pressure explosion-proof performance required in high-pressure and long-distance operation environment, and when the multilayer fiber reinforced net is compounded, the problem of delamination caused by loose connection between braided layer and rubber tube is prone to occur. UTILITY MODEL CONTENT
[0004] Therefore, it is necessary to provide a PVC hose of multilayer composite structure.
[0005] The utility model solves the technical scheme as follows: a PVC hose of multilayer composite structure, comprising:
[0006] A polyvinyl chloride inner layer, which is a hollow tubular structure;
[0007] A polyvinyl chloride middle layer, which is sleeved on the outer side surface of the polyvinyl chloride inner layer;
[0008] A double-braided reinforcing layer, which comprises: a first wire-wound braided layer and a second wire-wound braided layer, the first wire-wound braided layer is formed by spirally winding a plurality of groups of first double-strand ropes on the polyvinyl chloride middle layer, the second wire-wound braided layer is formed by spirally winding a plurality of groups of second double-strand ropes on the first wire-wound braided layer, the spirally winding direction of the first double-strand ropes is different from that of the second double-strand ropes, and the first double-strand ropes and the second double-strand ropes are interwoven to form a plurality of grid structures;
[0009] A polyvinyl chloride outer layer, which is sleeved on the outer side surface of the second wire-wound braided layer.
[0010] In one embodiment, a plurality of first wear-resistant ray layers are arranged on the outer side surface of the polyvinyl chloride outer layer.
[0011] In one embodiment, each of the first wear-resistant ray layers is uniformly distributed on the outer side surface of the polyvinyl chloride outer layer.
[0012] In one embodiment, an identification ray layer is arranged on the outer side surface of the polyvinyl chloride outer layer, and the width of the identification ray layer is greater than the width of the first wear-resistant ray layer.
[0013] In one embodiment, a plurality of second wear-resistant ray layers are arranged on the outer side surface of the polyvinyl chloride outer layer, each of the second wear-resistant ray layers is arranged in sequence and spaced apart from each of the first wear-resistant ray layers, and the width of the second wear-resistant ray layer is less than the width of the first wear-resistant ray layer.
[0014] In one embodiment, a plurality of third wear-resistant ray layers are arranged on the outer side surface of the polyvinyl chloride outer layer, each of the third wear-resistant ray layers is arranged in sequence and spaced apart from each of the first wear-resistant ray layers, and the thickness of the third wear-resistant ray layer is less than the thickness of the first wear-resistant ray layer.
[0015] In one embodiment, the cross-sectional shape of the first wear-resistant ray layer is square, arc or semicircular.
[0016] In one embodiment, the thickness ratio of the polyvinyl chloride inner layer, the polyvinyl chloride middle layer and the polyvinyl chloride outer layer is 2:2-5:1-3.
[0017] In one embodiment, the spiral angle of the first double-strand rope is 30°-60°, and the spiral angle of the second double-strand rope is 30°-60°.
[0018] In one embodiment, the spiral angle of the first double-strand rope is equal to the spiral angle of the second double-strand rope.
[0019] The beneficial effects of the utility model are: the utility model provides a PVC hose of multilayer composite structure, through polyvinyl chloride middle layer, double braided reinforcing layer and polyvinyl chloride outer layer are sequentially set on polyvinyl chloride inner layer and form multilayer composite structure, and double braided reinforcing layer is formed by the interweaving of the first wire winding braided layer formed by the spiral winding of a plurality of first double-strand ropes and the second wire winding braided layer formed by the spiral winding of a plurality of second double-strand ropes, so that not only the PVC hose of multilayer composite structure has better pressure resistance and explosion-proof effect, but also the torsional resistance of the PVC hose of multilayer composite structure is enhanced, thereby greatly prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a multi-layer composite PVC hose according to one embodiment.
[0022] Figure 2 This is a cross-sectional structural diagram of a multi-layer composite PVC hose according to one embodiment.
[0023] In the attached diagram, 10 is a multi-layer composite PVC hose; 100 is an inner layer of polyvinyl chloride; 200 is a middle layer of polyvinyl chloride; 300 is a double braided reinforcing layer; 310 is a first winding braided layer; 320 is a second winding braided layer; 400 is an outer layer of polyvinyl chloride; 410 is a first abrasion-resistant radiation layer; and 420 is a marking radiation layer. Detailed Implementation
[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.
[0025] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" 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 utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0026] In one embodiment, such as Figure 1 and Figure 2As shown, a multi-layer composite PVC hose 10 includes: a polyvinyl chloride (PVC) inner layer 100, a PVC middle layer 200, a double-braided reinforcing layer 300, and a PVC outer layer 400. The PVC inner layer 100 is a hollow tubular structure. The PVC middle layer 200 is sleeved on the outer surface of the PVC inner layer 100. The double-braided reinforcing layer 300 includes: a first winding braided layer 310 and a second winding braided layer 320. The first winding braided layer 310 is formed by multiple sets of first double-stranded ropes spirally wound on the PVC middle layer 200. The second winding braided layer 320 is formed by multiple sets of second double-stranded ropes spirally wound on the first winding braided layer 310. The spiral winding directions of the first double-stranded ropes and the second double-stranded ropes are opposite. The first double-stranded ropes and the second double-stranded ropes interweave to form multiple grid structures. The PVC outer layer 400 is sleeved on the outer surface of the second winding braided layer 320.
[0027] In this embodiment, the PVC inner layer 100 is a hollow tubular structure. The PVC inner layer 100, PVC middle layer 200, double braided reinforcing layer 300, and PVC outer layer 400 are sequentially wrapped from the inside out to form a multi-layer composite structure PVC hose 10, which can improve the overall structural strength and has stronger pressure resistance and impact resistance. The double braided reinforcing layer 300 is formed by interlacing multiple sets of first double-stranded ropes spirally wound into a first braided layer 310 and multiple sets of second double-stranded ropes spirally wound into a second braided layer 320. That is, the first braided layer 310 and the second braided layer 320 are sequentially spirally wound in both directions on the PVC middle layer 200. For example, the multiple sets of first double-stranded ropes of the first braided layer 310 are spirally wound into the PVC middle layer 200. The double-stranded rope is spirally wound on the PVC middle layer 200, and multiple sets of second double-stranded ropes are spirally wound on the first braided layer 310. The first double-stranded rope is a rope structure consisting of two parallel strands, and the second double-stranded rope is also a rope structure consisting of two parallel strands. The first and second braided layers 310 and 320 interweave to form multiple mesh structures. This three-dimensional braided structure, formed by multiple ropes and double strands working together, can effectively resist internal pressure and torque, uniformly disperse the internal fluid pressure of the PVC inner layer 100, limit radial expansion, and prevent local expansion or rupture. This gives the multi-layer composite PVC hose 10 better pressure resistance and explosion-proof performance. Simultaneously, it provides axial stiffness, improves torsional resistance and tensile strength, making the multi-layer composite PVC hose 10 more flexible and possessing better tensile and torsional resistance, thereby greatly extending its service life.
[0028] In one embodiment, such as Figure 1 and Figure 2As shown, a plurality of first abrasion-resistant ray layers 410 are disposed on the outer surface of the polyvinyl chloride outer layer 400, and each first abrasion-resistant ray layer 410 is evenly distributed on the outer surface of the polyvinyl chloride outer layer 400. Specifically, by providing the first abrasion-resistant ray layers 410, the abrasion resistance of the surface of the multi-layer composite PVC hose 10 can be significantly improved, surface damage caused by friction can be reduced, and better durability can be provided in scenarios requiring frequent dragging and friction, thereby further extending the service life.
[0029] In one embodiment, such as Figure 1 and Figure 2 As shown, a marking layer 420 is provided on the outer surface of the polyvinyl chloride outer layer 400, and the width of the marking layer 420 is greater than the width of the first wear-resistant layer 410. Specifically, the marking layer 420 is used to present a conspicuous color effect, which can improve the distinguishability of the multi-layer composite PVC hose 10, making it easier for workers to identify the hose type or usage status and ensuring safe use.
[0030] In one embodiment, a plurality of second abrasion-resistant ray layers are disposed on the outer surface of the PVC outer layer 400, with each second abrasion-resistant ray layer and each first abrasion-resistant ray layer 410 being sequentially spaced apart. The width of the second abrasion-resistant ray layer is smaller than the width of the first abrasion-resistant ray layer 410. Specifically, by sequentially and spaced first abrasion-resistant ray layers 410 and second abrasion-resistant ray layers of different widths on the outer surface of the PVC outer layer 400, targeted protection can be provided for different wear scenarios. That is, protection can be provided for differences in wear risk. The first abrasion-resistant ray layer 410 is used to withstand high-intensity friction, while the second abrasion-resistant ray layer is used for low-wear areas, thereby optimizing the performance balance and enabling the multi-layer composite PVC hose 10 to take into account both abrasion resistance and flexibility.
[0031] In one embodiment, a plurality of third abrasion-resistant ray layers are disposed on the outer surface of the PVC outer layer 400, with each third abrasion-resistant ray layer and each first abrasion-resistant ray layer 410 being sequentially and alternately distributed, and the thickness of the third abrasion-resistant ray layer being less than the thickness of the first abrasion-resistant ray layer 410. Specifically, by sequentially and alternately distributing first abrasion-resistant ray layers 410 and third abrasion-resistant ray layers of different thicknesses on the outer surface of the PVC outer layer 400, targeted protection can be provided for different wear scenarios, that is, protection can be provided for differences in wear risk. The first abrasion-resistant ray layer 410 is used to withstand high-intensity friction, while the third abrasion-resistant ray layer is used for low-wear areas, thereby optimizing the performance balance and enabling the multi-layer composite PVC hose 10 to take into account both abrasion resistance and flexibility.
[0032] In one embodiment, the cross-sectional shape of the first wear-resistant ray layer 410 is set to square, arc, or semi-circular. Specifically, setting the cross-sectional shape of the first wear-resistant ray layer 410 to square, arc, or semi-circular can improve the wear resistance of the multi-layer composite PVC hose 10. The first wear-resistant ray layer 410 with different cross-sectional shapes can be selected according to the specific application scenario to balance performance and cost. In this embodiment, no specific limitation is made.
[0033] In one embodiment, the thickness ratio of the PVC inner layer 100, the PVC middle layer 200, and the PVC outer layer 400 is 2:2-5:1-3. Specifically, setting different thicknesses for the PVC inner layer 100, PVC middle layer 200, and PVC outer layer 400 can optimize the performance of the multi-layer composite PVC hose 10, simultaneously meeting multiple requirements such as wear resistance, pressure resistance, and flexibility. By setting the thickness ratio of the PVC inner layer 100, PVC middle layer 200, and PVC outer layer 400 to 2:2-5:1-3, a good balance can be achieved between wear resistance, pressure resistance, flexibility, and cost in the multi-layer composite PVC hose 10. The thickness of each layer can be dynamically adjusted according to specific application requirements, thereby ensuring the reliability and economy of the multi-layer composite PVC hose 10 under complex working conditions.
[0034] In one embodiment, the helix angle of the first double-stranded rope is set to 30°-60°, and the helix angle of the second double-stranded rope is set to 30°-60°. Specifically, the first double-stranded rope is spirally wound on the polyvinyl chloride middle layer 200 to form a first braided layer 310, and the second double-stranded rope is spirally wound on the first braided layer 310 to form a second braided layer 320. The smaller the helix winding angle, the better the tensile strength; the larger the helix winding angle, the better the flexibility. The helix angles of the first and second double-stranded ropes can be adjusted according to the required mechanical properties of the multi-layer composite PVC hose 10. In this embodiment, no specific limitation is made.
[0035] In one embodiment, the helix angle of the first double-stranded rope is equal to the helix angle of the second double-stranded rope. Specifically, by setting the same helix angle for the first and second double-stranded ropes, the axial and circumferential mechanical properties can be balanced, thereby enabling the multi-layer composite PVC hose 10 to have balanced mechanical properties and better tensile, burst, and torsional resistance.
[0036] Compared with the prior art, the present invention has at least the following advantages:
[0037] This utility model provides a multi-layer composite PVC hose, which consists of a PVC middle layer, a double-braided reinforcing layer, and a PVC outer layer sequentially nested on a PVC inner layer to form a multi-layer composite structure. The double-braided reinforcing layer is formed by interweaving multiple sets of first double-stranded ropes spirally wound into a first braided layer and multiple sets of second double-stranded ropes spirally wound into a second braided layer. This not only gives the multi-layer composite PVC hose better pressure resistance and explosion-proof performance, but also enhances its torsion resistance, thereby greatly extending its service life.
[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A multi-layer composite PVC hose, characterized in that, include: A polyvinyl chloride inner layer, wherein the polyvinyl chloride inner layer is a hollow tubular structure; A polyvinyl chloride (PVC) middle layer, wherein the PVC middle layer is sleeved on the outer surface of the PVC inner layer; The double-braided reinforcement layer includes: a first winding braided layer and a second winding braided layer. The first winding braided layer is formed by spirally winding multiple sets of first double-stranded ropes on the polyvinyl chloride intermediate layer. The second winding braided layer is formed by spirally winding multiple sets of second double-stranded ropes on the first winding braided layer. The spiral winding directions of the first double-stranded ropes and the spiral winding directions of the second double-stranded ropes are opposite. The first double-stranded ropes and the second double-stranded ropes are interwoven to form multiple grid structures. A polyvinyl chloride outer layer is sleeved on the outer surface of the second braided layer.
2. The multi-layer composite PVC hose according to claim 1, characterized in that, Multiple first abrasion-resistant ray layers are provided on the outer surface of the polyvinyl chloride outer layer.
3. The multi-layer composite PVC hose according to claim 2, characterized in that, Each of the first wear-resistant ray layers is uniformly distributed on the outer surface of the polyvinyl chloride outer layer.
4. The multi-layer composite PVC hose according to claim 3, characterized in that, A marking ray layer is provided on the outer surface of the polyvinyl chloride outer layer, and the width of the marking ray layer is greater than the width of the first wear-resistant ray layer.
5. The multi-layer composite PVC hose according to claim 3, characterized in that, Multiple second wear-resistant ray layers are provided on the outer surface of the polyvinyl chloride outer layer. Each second wear-resistant ray layer and each first wear-resistant ray layer are arranged alternately in sequence. The width of the second wear-resistant ray layer is smaller than the width of the first wear-resistant ray layer.
6. The PVC flexible hose with a multi-layer composite structure according to claim 3, characterized in that, Multiple third wear-resistant ray layers are provided on the outer surface of the polyvinyl chloride outer layer. Each third wear-resistant ray layer and each first wear-resistant ray layer are arranged alternately in sequence. The thickness of the third wear-resistant ray layer is less than the thickness of the first wear-resistant ray layer.
7. The PVC flexible hose with a multi-layer composite structure according to claim 3, characterized in that, The cross-sectional shape of the first wear-resistant ray layer is set to square, arc or semi-circular.
8. The multi-layer composite PVC hose according to claim 1, characterized in that, The thickness ratio of the inner polyvinyl chloride layer, the middle polyvinyl chloride layer, and the outer polyvinyl chloride layer is 2:2-5:1-3.
9. The multi-layer composite PVC hose according to claim 1, characterized in that, The spiral angle of the first double-stranded rope is set to 30°-60°, and the spiral angle of the second double-stranded rope is set to 30°-60°.
10. The PVC flexible hose with a multi-layer composite structure according to claim 9, characterized in that, The helix angle of the first double-stranded rope is equal to the helix angle of the second double-stranded rope.