Multi-layer pipe and manufacturing method of pipe

Abstract

The invention belongs to the technical field of telescopic water pipes, and particularly relates to a multi-layer pipe which comprises a liquid conveying pipe and a protective sleeve, the liquid conveying pipe is arranged in the protective sleeve in a penetrating mode, the liquid conveying pipe and the protective sleeve can stretch out and draw back in the length direction, and the protective sleeve comprises a pipe body formed by weaving elastic wires and high-strength wires. The elastic wires extend along the length direction of the tube body and are woven in the tube body; the tube body comprises convex ring parts and concave ring parts, the convex ring parts and the concave ring parts surround the periphery of the infusion tube, the convex ring parts and the concave ring parts are arranged in a staggered mode in the length direction of the tube body, the longitudinal section of the protective sleeve is of a corrugated structure, and in a normal state, the elastic wires can drive the tube body to contract, and two adjacent convex ring parts or two adjacent concave ring parts are made to be close to each other; the multiple layers of pipes are controlled to stretch, the oil conveying pipe and the protective sleeve can stretch in the length direction, and the convex ring part can contract towards the liquid conveying pipe. The invention aims to provide the multi-layer pipe which is convenient for a user to use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of telescopic water pipes, and particularly relates to a multilayer pipe. BACKGROUND

[0002] A telescopic water pipe is a special water pipe made of elastic material, which can be elongated during use to facilitate use and can be contracted during storage to facilitate storage.

[0003] In order to prolong the service life of the telescopic water pipe, many telescopic water pipes adopt a multilayer structure, and some telescopic water pipes include a water conveying pipe and an outer sleeve made of a woven belt, which has good wear resistance and can avoid the water conveying pipe from being rapidly aged by ultraviolet radiation, such as the telescopic water pipe disclosed in Chinese Invention Patent CN201810096910.2, which includes a pipe body, a pipe joint and a valve joint; the pipe body includes an inner pipe and an outer pipe, the inner pipe is located inside the outer pipe, the inner pipe is made of elastic material, and the outer pipe is made of inelastic fabric, the length of the outer pipe is greater than the length of the inner pipe; one end of the pipe body is provided with a pipe joint, and the other end is provided with a valve joint.

[0004] In the above structure, the outer pipe is made of inelastic fabric, so that the outer pipe can only be stretched to the original length of the outer pipe, resulting in a small elongation ratio of the telescopic water pipe, which is inconvenient for users to use. SUMMARY

[0005] In order to overcome the defects in the prior art, the purpose of the present application is to provide a multilayer pipe which is convenient for users to use.

[0006] The purpose of the present application is achieved as follows:

[0007] A multilayer pipe includes a liquid conveying pipe and a protective sleeve, the liquid conveying pipe is arranged in the protective sleeve, and the liquid conveying pipe and the protective sleeve can be telescoped along the length direction, the protective sleeve includes a pipe body woven by elastic filaments and high-strength filaments, the elastic filaments extend along the length direction of the pipe body and are woven in the pipe body;

[0008] The pipe body includes a convex ring part and a concave ring part, the convex ring part and the concave ring part are arranged around the outer periphery of the liquid conveying pipe, and the convex ring part and the concave ring part are staggered along the length direction of the pipe body, and the longitudinal section of the protective sleeve forms a corrugated structure, under normal circumstances, the elastic filaments can drive the pipe body to contract, and the adjacent two convex ring parts or the adjacent two concave ring parts are close to each other; the elongation of the multilayer pipe is controlled, the liquid conveying pipe and the protective sleeve can be stretched along the length direction, and the convex ring part can be contracted to the liquid conveying pipe.

[0009] The application is further provided that in the natural state, the length of the elastic wire in the protective sleeve is less than the length of the tube body, so that the elastic wire can drive the tube body to contract and make the adjacent two convex ring parts or the adjacent two concave ring parts close together.

[0010] The application is further provided that the elastic wire is a core-wrapped wire, and the elastic wire comprises a core made of latex or spandex wire, and a plurality of layers of coating layers formed by high-speed wrapping around the periphery of the core.

[0011] The application is further provided that the elastic wire comprises a core made of spandex wire, and the specification of the spandex wire is 150D low-elasticity spandex.

[0012] The application is further provided that the high-strength wire comprises warp and weft, the tube body is formed by weaving the warp and weft, the elastic wire is arranged between the warp and weft, and during the weaving process of the tube body, the warp is woven on the inner side of the elastic wire, and the weft is woven on the outer side of the elastic rope.

[0013] The application is further provided that the warp and weft are at a certain angle with the elastic wire.

[0014] The application is further provided that the warp and weft each comprise a plurality of high-strength wires arranged side by side; during the weaving process of the warp and weft, the high-strength wires are unfolded and expanded to shield the inner and outer sides of the elastic wire, so that the elastic wire is hidden.

[0015] A manufacturing method for producing the pipe, characterized in that the pipe comprises a transfusion tube and a protective sleeve, the transfusion tube is arranged in the protective sleeve, and the manufacturing method comprises the following steps:

[0016] A. using a weaving machine to weave the warp and weft to form a tube body, and weaving the elastic wire on the side wall of the tube body during the weaving process to form a protective sleeve;

[0017] B. uniformly and interval pre-forming and ironing the protective sleeve by using a crimping machine, then sleeving the protective sleeve on a round bar to uniformly wrinkle, so that convex ring parts and concave ring parts (12) are formed on the protective sleeve, and finally ironing and forming the protective sleeve;

[0018] C. then controlling the transfusion tube to pass through the protective sleeve.

[0019] The application is further provided that in step B, the protective sleeve is first pressed into a flat shape, and then uniformly pre-formed and ironed by using a crimping machine.

[0020] The application is further provided that in step C, the protective sleeve is first stretched, a traction rope is passed through the protective sleeve, then the traction rope is fixedly connected with the transfusion tube and the transfusion tube is stretched and deformed by traction, and finally the transfusion tube is gradually passed through the protective sleeve by traction of the traction rope.

[0021] The present application has the advantages compared with the prior art:

[0022] 1、The infusion tube and the protective sleeve in the present application can be stretched and contracted along the length direction, and the infusion tube and the protective sleeve can be synchronously stretched and contracted during the stretching and contraction of the multi-layer tube, which is convenient for the stable stretching and contraction of the multi-layer tube and the use of the user; since the protective sleeve comprises the elastic wire and the tube body woven by the high-strength wire, it is beneficial to increase the maximum stretching amount of the protective sleeve, thereby improving the elongation ratio of the multi-layer tube, and the multi-layer tube can deliver liquid to a farther place during use, which is convenient for the use of the user, and the setting of the convex ring part and the concave ring part is beneficial to further improve the elongation ratio of the protective sleeve and improve the stretching and contraction limit range of the multi-layer tube.

[0023] 2、Since the length of the elastic wire is less than the length of the tube body in the protective sleeve of a certain length in the natural state, the structure is convenient for the elastic wire to drive the tube body to contract, and the overall length of the protective sleeve and the infusion tube is similar, which avoids the local accumulation of the protective sleeve during the contraction of the multi-layer tube, and is convenient for the elongation and contraction of the multi-layer tube and the use of the user.

[0024] 3、Since the elastic wire is a wrapped root line, it is beneficial to increase the friction between the elastic wire and the warp and weft, and is convenient for the synchronous contraction of the elastic wire and the tube body, the structure can reduce the stretching and avoid the relative sliding between the elastic wire and the warp and weft, which is beneficial to the uniform deformation of the elastic wire during the stretching and contraction of the multi-layer tube, and is beneficial to prolong the service life of the elastic wire and the multi-layer tube; the 150D low-elasticity spandex has weak tension elasticity, the elasticity is more moderate, can quickly recover to the original shape after stretching, and the recovery rate can reach more than 95%, which is beneficial to prolong the service life of the elastic wire.

[0025] 4、The setting of the warp and weft makes the elastic wire relatively independent of the tube body, the tube body can continue to be used when the elastic wire is damaged, which is beneficial to prolong the service life of the multi-layer tube, since the warp is woven on the inner side of the elastic wire and the weft is woven on the outer side of the elastic wire, it is beneficial to reduce the bending of the elastic wire during production and use, and is convenient for the free stretching and contraction of the elastic wire; the parallelly arranged high-strength wire is beneficial to shield the inner and outer sides of the elastic wire, avoid the abrasion or aging of the elastic wire due to being exposed, and is beneficial to prolong the service life of the elastic wire.

[0026] 5、Since the warp and weft are at a certain angle with the elastic wire, and the elastic wire extends along the length direction of the tube body, the structure makes the warp and weft not perpendicular or parallel to the elastic wire and the water delivery tube, and the weaving structure can disperse the friction force on the tube body after the water delivery tube is expanded during the elongation of the elastic wire and the water delivery tube, which makes the stretching and contraction of the multi-layer tube more smooth, reduces the friction on the water delivery tube and the protective sleeve during use, and the higher the water pressure of the water delivery tube, the more the axial and radial expansion of the water delivery tube, so that the protective sleeve is pulled tight, the structure is more compact, and the protection performance is better.

[0027] 6、The convex ring part and the concave ring part are first processed on the protective sleeve in the application, and then the infusion tube is installed and matched with the protective sleeve, so that the infusion tube is prevented from being damaged in the whole pressing and setting process of the protective sleeve, and the processing and forming of the protective sleeve are facilitated; the flattening in step B is beneficial to subsequent processing, and the convex ring part and the concave ring part are prevented from being inclined; in step C, the infusion tube is radially contracted by controlling the infusion tube to be taut through the traction rope, so that the infusion tube is facilitated to be inserted into the protective sleeve, and the connection and matching of the infusion tube with the protective sleeve are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the cross-sectional view of the multilayer pipe in a natural state of the application;

[0029] Figure 2 is the cross-sectional view of the multilayer pipe in an elongated state of the application;

[0030] Figure 3 is the weaving schematic diagram of the warp, weft and elastic silk when the pipe body is in an unfolded state in the application;

[0031] Figure 4 is the exploded schematic diagram of the weaving structure of the warp, weft and elastic silk in the application;

[0032] Figure 5 is the exploded schematic diagram of the weaving structure of the warp, weft and elastic silk in the application;

[0033] Figure 6 is the structural schematic diagram of the pipe body woven by high-strength silk and elastic rope in the application;

[0034] Figure 7 is the structural schematic diagram of the elastic silk in the application.

[0035] Meaning of the reference numerals in the figure: 1-protective sleeve; 11-convex ring part; 12-concave ring part; 2-infusion tube; 3-corrugated pipe; 4-warp; 5-weft; 6-elastic silk; 61-core sheath; 62-coating layer; 7-high-strength silk. DETAILED DESCRIPTION

[0036] The application will be further described below in combination with the drawings and specific embodiments:

[0037] Reference is made to Figures 1 to 7As shown, a multi-layer pipe includes a transfusion tube 2 and a protective sleeve 1, the transfusion tube 2 is arranged in the protective sleeve 1, and the transfusion tube 2 and the protective sleeve 1 can be stretched and contracted along the length direction, the protective sleeve 1 includes a pipe body woven by elastic wires 6 and high-strength wires 7, the elastic wires 6 extend along the length direction of the pipe body and are woven in the pipe body, in this structure, the transfusion tube 2 and the protective sleeve 1 can be stretched and contracted synchronously during the stretching and contraction of the multi-layer pipe, which is convenient for the stable stretching and contraction of the multi-layer pipe and the use of the user; and since the protective sleeve 1 includes the pipe body woven by the elastic wires 6 and the high-strength wires 7, it is beneficial to increase the maximum stretching amount of the protective sleeve 1, thereby improving the elongation ratio of the multi-layer pipe, and the multi-layer pipe can deliver liquid to a farther place during use, which is convenient for the use of the user.

[0038] The pipe body includes convex ring portions 11 and concave ring portions 12, the convex ring portions 11 and the concave ring portions 12 are arranged around the outer periphery of the transfusion tube 2 and are staggered along the length direction of the pipe body, under normal circumstances, the elastic wires 6 can drive the pipe body to contract, and the convex ring portions 11 and the concave ring portions 12 form a corrugated structure; the oil delivery pipe and the protective sleeve 1 can be stretched along the length direction, and the convex ring portions 11 can be contracted towards the transfusion tube 2, the arrangement of the convex ring portions 11 and the concave ring portions 12 in this structure is beneficial to further improve the elongation ratio of the protective sleeve 1, and the arrangement of the elastic wires 6 is convenient for the automatic contraction of the convex ring portions 11 and the concave ring portions 12, and makes the overall length of the protective sleeve 1 close to that of the transfusion tube 2, thereby avoiding the local accumulation of the protective sleeve 1 during the contraction of the multi-layer pipe, facilitating the elongation and contraction of the multi-layer pipe, and being convenient for the use of the user.

[0039] Preferably, under the natural state, the length of the elastic wires 6 in a certain length of the protective sleeve 1 is less than the length of the pipe body, so that the elastic wires 6 can drive the pipe body to contract, and the adjacent two convex ring portions 11 or the adjacent two concave ring portions 12 are close to each other, which is beneficial to the full contraction of the pipe body, avoids the local accumulation of the protective sleeve during the contraction of the multi-layer pipe, facilitates the elongation and contraction of the multi-layer pipe, and is convenient for the use of the user,

[0040] The corrugated pipe 3 is arranged between the transfusion tube 2 and the protective sleeve 1, the transfusion tube 2 is arranged in the corrugated pipe 3, and the pipe body is arranged around the outer periphery of the corrugated pipe 3, the corrugated pipe 3 can be freely stretched and contracted within a certain range, and the corrugated pipe 3 is light in weight and resistant to high pressure, which can effectively protect the transfusion tube 2, avoid the direct contact of external liquid or external environment with the transfusion tube 2, and is beneficial to prolonging the service life of the transfusion tube 2.

[0041] The elastic yarn 6 described in this invention is a core-wrapped yarn. The elastic yarn 6 includes a core 61 made of latex yarn or spandex yarn, and a multi-layered covering layer 62 formed by high-speed wrapping around the outer periphery of the core 61. This structure is beneficial to increasing the friction between the elastic yarn 6 and the warp yarn 4 and weft yarn 5, facilitating the synchronous contraction of the elastic yarn 6 and the tube body. This structure can reduce stretching and avoid relative sliding between the elastic yarn 6 and the warp yarn 4 and weft yarn 5, which is beneficial to the uniform deformation of the elastic yarn 6 during the expansion and contraction of the multi-layer tube, and helps to extend the service life of the elastic yarn 6 and the multi-layer tube.

[0042] In this embodiment, the elastic yarn 6 includes a core 61 made of spandex yarn. The spandex yarn is 150D low-elasticity spandex. 150D low-elasticity spandex has weak tensile elasticity and its elasticity is more moderate. After stretching, it can quickly return to its original shape with a recovery rate of more than 95%, which is beneficial to extending the service life of the elastic yarn 6.

[0043] The tube body can be woven from high-strength yarn 7 and elastic yarn 6. This structure is a common technical means in the textile field. Therefore, although this structure is only shown in the accompanying drawings of the specification, those skilled in the art can implement this technical solution. Preferably, the high-strength yarn 7 includes warp yarn 4 and weft yarn 5. The tube body is woven from warp yarn 4 and weft yarn 5. The arrangement of warp yarn 4 and weft yarn 5 allows the elastic yarn 6 to be relatively independent from the tube body. When the elastic yarn 6 is damaged, the tube body can continue to be used, which is beneficial to extending the service life of multi-layer tubes.

[0044] The elastic thread 6 is placed between the warp thread 4 and the weft thread 5. During the tube weaving process, the warp thread 4 is woven inside the elastic thread 6, and the weft thread 5 is woven outside the elastic rope. This structure helps to reduce the bending of the elastic thread 6 during production and use, and facilitates the free expansion and contraction of the elastic thread 6.

[0045] In this invention, both the warp yarn 4 and the weft yarn 5 form a certain angle with the elastic thread 6, that is, both the warp yarn 4 and the weft yarn 5 are inclined to the elastic thread 6. This structure ensures that the warp yarn 4 and the weft yarn 5 are not perpendicular or parallel to the elastic thread 6 and the water pipe. During the elongation of the elastic thread 6 and the water pipe, this braided structure can disperse the frictional force on the pipe body after the water pipe expands, making the expansion and contraction of the multi-layer pipe smoother and reducing the friction on the water pipe and the protective sleeve 1 during use. Moreover, the higher the water pressure of the water pipe, the more the axial and radial expansion of the water pipe, thereby tightening the protective sleeve 1, making the structure more compact, and improving the protective performance.

[0046] In this embodiment, both the warp 4 and weft 5 include several high-strength yarns 7 arranged in parallel. During the weaving process of the warp 4 and weft 5, the high-strength yarns 7 are spread out loosely, and the warp 4 and weft 5 respectively cover the inner and outer sides of the elastic yarn 6, thereby hiding the elastic yarn 6. The parallel arrangement of the high-strength yarns 7 is beneficial to covering the inner and outer sides of the elastic yarn 6, avoiding wear or aging of the elastic yarn 6 due to exposure, and helping to extend the service life of the elastic yarn 6.

[0047] A method for manufacturing the pipe, characterized in that: the pipe includes an infusion tube 2 and a protective sleeve 1, the infusion tube 2 being inserted into the protective sleeve 1, and the manufacturing method includes the following steps:

[0048] A. Use a braiding machine to braid the warp 4 and weft 5 to form a tube, and during the braiding process, the elastic yarn 6 is braided on the side wall of the tube to form a protective sleeve 1;

[0049] B. The protective sleeve 1 is pre-shaped and ironed at even intervals using a pleating machine. Then, the protective sleeve 1 is placed on a round bar and pleated evenly to form a convex ring 11 and a concave ring 12 on the protective sleeve 1. Finally, the protective sleeve 1 is ironed and shaped.

[0050] C. Then, control the infusion tube 2 to be inserted into the protective sleeve 1.

[0051] In this method, a convex ring 11 and a concave ring 12 are first machined on the protective sleeve 1, and then the infusion tube 2 is installed and fitted with the protective sleeve 1 to avoid damage to the infusion tube 2 during the ironing and shaping process of the protective sleeve 1, and to facilitate the processing and shaping of the protective sleeve 1.

[0052] In step B of the present invention, the protective sleeve 1 is first pressed into a flat shape, and then the protective sleeve 1 is uniformly pre-shaped and ironed using a wrinkling machine. This step is beneficial for subsequent processing, avoids the convex ring 11 and concave ring 12 from being misaligned, and helps to improve the aesthetics of the protective sleeve 1.

[0053] In step C, first, the protective sleeve 1 is straightened and the traction rope is passed through the protective sleeve 1. Then, the traction rope is fixedly connected to the infusion tube 2 and the infusion tube 2 is stretched and deformed. Finally, the infusion tube 2 is gradually pulled into the protective sleeve 1 by the traction rope. The infusion tube 2 can be radially contracted by controlling the tension of the infusion tube 2 by the traction rope. This step facilitates the infusion tube 2 to be inserted into the protective sleeve 1 and makes it convenient for the infusion tube 2 to be connected and matched with the protective sleeve 1.

[0054] The braiding machine, pleating machine, and sleeve method are all existing technologies. Those skilled in the art can implement the manufacturing scheme of the present invention based on the description. Therefore, although they are not shown in the accompanying drawings of the present invention, those skilled in the art can implement the technical solution.

[0055] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-layer tubing, comprising an infusion tube (2) and a protective sleeve (1), wherein the infusion tube (2) passes through the protective sleeve (1), characterized in that: Both the infusion tube (2) and the protective sleeve (1) can extend and retract along the length direction. The protective sleeve (1) includes a tube body woven from elastic wire (6) and high-strength wire (7). The elastic wire (6) extends along the length direction of the tube body and is woven into the tube body. The tube body includes a convex ring (11) and a concave ring (12), both of which surround the outer periphery of the infusion tube (2). The convex ring (11) and the concave ring (12) are staggered along the length of the tube body, and the longitudinal section of the protective sleeve (1) forms a corrugated structure. Under normal conditions, the elastic wire (6) can drive the tube body to contract and bring two adjacent convex rings (11) or two adjacent concave rings (12) closer together. By controlling the elongation of the multi-layer tube, both the infusion tube (2) and the protective sleeve (1) can be stretched along the length direction, and the convex ring (11) can contract toward the infusion tube (2).

2. The multi-layer pipe according to claim 1, characterized in that: In its natural state, in a protective sleeve (1) of a certain length, the length of the elastic wire (6) is less than the length of the tube body, so that the elastic wire (6) can drive the tube body to contract and bring two adjacent convex rings (11) or two adjacent concave rings (12) closer together.

3. A multi-layer pipe according to claim 1 or 2, characterized in that: The elastic yarn (6) is a core-wrapped yarn, which includes a core (61) made of latex yarn or spandex yarn, and a multi-layered covering layer (62) formed by high-speed wrapping around the outer periphery of the core (61).

4. A multi-layer pipe according to claim 3, characterized in that: The elastic filament (6) comprises a core (61) made of spandex filament, the spandex filament being a 150D low-elasticity spandex.

5. A multi-layer pipe according to claim 1, 2, or 4, characterized in that: The tube is woven from warp threads (4) and weft threads (5), with elastic threads (6) placed between the warp threads (4) and weft threads (5). During the weaving process, the warp threads (4) are woven inside the elastic threads (6), and the weft threads (5) are woven outside the elastic threads.

6. A multi-layer pipe according to claim 5, characterized in that: Both the warp (4) and weft (5) form a certain angle with the elastic thread (6).

7. A multi-layer pipe according to claim 6, characterized in that: Both the warp (4) and weft (5) include several high-strength yarns (7) arranged in parallel. During the weaving process of the warp (4) and weft (5), the high-strength yarns (7) are spread out loosely and the warp (4) and weft (5) cover the inner and outer sides of the elastic yarn (6) respectively, so that the elastic yarn (6) is hidden.

8. A method for manufacturing the pipe according to claim 1, characterized in that: The tubing includes an infusion tube (2) and a protective sleeve (1), with the infusion tube (2) passing through the protective sleeve (1). The manufacturing method includes the following steps: A. Use a braiding machine to braid the warp (4) and weft (5) to form a tube, and during the braiding process, the elastic thread (6) is braided on the side wall of the tube to form a protective sleeve (1); B. The protective sleeve (1) is pre-shaped and ironed at even intervals using a pleating machine. Then the protective sleeve (1) is placed on a round bar and pleated evenly, so that a convex ring (11) and a concave ring (12) are formed on the protective sleeve (1). Finally, the protective sleeve (1) is ironed and shaped. C. Then control the infusion tube (2) to be inserted into the protective sleeve (1).

9. A method for manufacturing a pipe according to claim 8, characterized in that: In step B, the protective sleeve (1) is first pressed into a flat shape, and then the protective sleeve (1) is uniformly pre-shaped and ironed using a wrinkle press.

10. A method for manufacturing a pipe according to claim 8, characterized in that: In step C, first, the protective sleeve (1) is straightened and the traction rope is passed through the protective sleeve (1). Then, the traction rope is fixedly connected to the infusion tube (2) and the infusion tube (2) is stretched and deformed. Finally, the infusion tube (2) is gradually pulled into the protective sleeve (1) by the traction rope.

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