CN217130729U - Vector telescopic continuous sheath and plastic-coated pipe - Google Patents

Abstract

The application provides a flexible continuity sheath of vector and plastic-coated pipe. The vector telescoping continuous sheath is used for sleeving a structure needing protection to form a protective surface, and comprises: a first casing section having elasticity in a radial direction and being expandable outward in a natural state; a second casing section having a heat-shrinkable property in a radial direction and being shrinkable inward under a heated condition on the basis of a natural state; wherein all of the first casing section and the second casing section form a continuous casing structure. The entire sheath is made by a continuous weft knitting process. The plastic coated pipe comprises an inner pipe and the vector telescopic continuous sheath; wherein, the vector flexible continuous sheath is sleeved on at least part of the length of the inner pipe to form a plastic-coated protective layer; the first casing pipe section expands outwards and is sleeved to the partial length of the inner pipe, and the second casing pipe section contracts inwards and is attached to the inner pipe under the heated condition after being sleeved to the partial length of the inner pipe. This application is easily established, the equal preferred of protection effect and adaptability.

Description

Vector telescopic continuous sheath and plastic-coated pipe

Technical Field

The utility model relates to a protective case technical field especially relates to a flexible continuity sheath of vector and plastic-coated pipe.

Background

In the course of industrial development, many fields of application require the use of pipes for the connection. With the continuous development of each technical field, the shape of the pipeline becomes more complex, and the pipeline with relatively stable external diameter size is changed into a complex pipeline consisting of a plurality of sections of pipelines with greatly different external diameter sizes. A plurality of pipelines need to be sheathed with sheaths on the surfaces for protection, and play roles of wear resistance, liquid resistance, temperature resistance and the like.

When protecting a section of continuous pipeline with large variation of the outer diameter size, the prior art is difficult to completely attach to the pipeline to realize good protection, or the sheaths with different characteristics of multiple sections are required to protect each section of pipeline respectively, so that the protection effect is poor, the flatness of the outer wall of the plastic-coated pipe is poor, and the sleeving process is complex and has poor adaptability. There is therefore a need for a sheath that can telescope both outward and inward to meet the needs of these particular lines.

SUMMERY OF THE UTILITY MODEL

Not enough more than to prior art exists, the utility model aims to provide an easily overlap establish, the better flexible continuity sheath of vector of protection effect and adaptability and mould the pipe based on the package of this sheath.

In order to achieve the above object, the present invention provides the following technical solutions.

A vector telescoping continuous sheath for application to a structure to be protected to form a protective surface, comprising: at least a first casing section, having elasticity in a radial direction, and being expandable outward in a natural state; at least a second casing section having heat-shrinkable properties in the radial direction and being shrinkable inwardly under heat in a natural state; wherein all of the first casing section and the second casing section form a continuous jacket structure.

In some embodiments, the first casing length and the second casing length are both braided casings, and the vector stretch continuous sheath is made by a continuous braiding process.

In some embodiments, the continuous knitting process is a weft knitting process.

In some embodiments, the weave structure of the weft knitting process is at least one of a weft plain weave, a rib weave, and a links-links weave.

In some embodiments, the vector telescoping continuity sheath includes at least 2 of the first sheath segments having different maximum expansion rates and/or includes at least 2 of the second sheath segments having different contraction rates.

In some embodiments, all of the first casing sections and all of the second casing sections are of the same diameter in a natural state, forming a single diameter vector telescoping continuous sheath.

In some embodiments, the first casing section is made from a multifilament fabric weave having elasticity.

In some embodiments, the second sleeve section is woven from multifilament fibers and heat shrinkable monofilaments or the second sleeve section is woven from heat shrinkable monofilaments.

In some embodiments, different of the second casing sections are made by the same pre-dilation tube by treating it with different cross-linking processes, and/or made with different expansion ratios.

The application also provides a plastic-coated pipe which comprises an inner pipe and any one of the vector telescopic continuous sheaths; the vector telescopic continuous sheath is sleeved on at least part of the length of the inner pipe to form a plastic-coated protective layer; the first casing pipe section is outwards expanded and sleeved to the partial length of the inner pipe, and the second casing pipe section is sleeved to the partial length of the inner pipe and then inwards shrunk and attached to the inner pipe under the heated condition.

The utility model discloses an each embodiment has at least one in the following technological effect:

1. the pipeline protection device has the advantages that the pipeline protection device can adapt to pipelines with complex structures by arranging the first casing pipe section and the second casing pipe section with different telescopic characteristics, only the same continuous sheath or a small number of continuous sheaths are needed to complete the protection of the pipelines with the complex structures, and the pipeline protection device can be suitable for pipelines with diameter variation range reaching 4.5 times or even higher; the sleeve is easy to sleeve, and the elastic structure of the first sleeve section and the heat-shrinkable structure of the second sleeve section can be well attached to the outer surface of the pipeline; while the same continuous jacket can provide better structural integrity and a smoother outer surface;

2. the production rate can be improved by adopting the continuous weaving process to manufacture the sheath; by adopting the weft knitting process, the first sleeve section adopting the multifilament fiber braided wire has better elasticity in the radial direction, and the second sleeve section adopting the heat-shrinkable monofilament braided wire has better heat-shrinkable performance in the radial direction;

3. the first sleeve pipe section is made of the multifilament fiber braided wire, and the heat-shrinkable monofilament and the multifilament fibers are combined in the second sleeve pipe section, so that the sheath has better strength and wear resistance;

4. by combining the first casing pipe sections with different maximum expansion ratios, the first casing pipe sections with the same diameter can be suitable for pipelines with different diameters; by combining the second casing pipe sections with different shrinkage ratios, a plurality of second casing pipe sections with the same diameter can be suitable for pipelines with different diameters;

5. in a natural state before the jacket is arranged on the pipeline, all the first jacket pipe sections and the second jacket pipe sections are made to have the same diameter, so that the jacket is easy to package and transport.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in conjunction with the accompanying drawings.

FIG. 1 is a schematic view of one embodiment of a vector telescoping continuous sheath for use with an overmolded tube;

FIG. 2 is a schematic view of the vector telescoping continuous sheath of the embodiment of FIG. 1 in a natural state before installation;

FIG. 3 is a schematic view of the inner tube of the embodiment of FIG. 1 without the sheath;

FIG. 4 is a schematic view of one embodiment of a weft knit process stitch construction of the first casing length;

FIG. 5 is a schematic view of one embodiment of a weft knit process stitch construction of a second casing length;

FIG. 6 is a schematic view of another embodiment of a weft knit process stitch construction of a second casing length;

the reference numbers illustrate:

100. the vector stretch continuous sheath 110, first sheath segment 111, first multifilament fiber 120, second sheath segment 121, heat shrinkable monofilament 122, second multifilament fiber 200, inner tube 210, first inner segment 220, second inner segment 230, third inner segment.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain specific embodiments of the present invention with reference to the accompanying drawings. The drawings in the following description are only examples of the invention, and it will be clear to a person skilled in the art that other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In some of the figures, elements having the same structure or function are shown only schematically or only schematically. In this document, "a" means not only "only one of this but also a case of" more than one ". The term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, an embodiment of the vector telescoping continuous sheath 100 of the present application is used to cover a structure to be protected, which is an inner tube 200 made of metal having a plurality of tube sections of different diameters, to form a protective surface. Fig. 1 shows a state in which the vector telescopic continuous sheath 100 has been fitted on the inner tube 200, and the technical concept of the present application can be more clearly explained in this state, so the technical solution of the present embodiment is mainly explained by taking this state as an example.

Since the inner tube 200 has a plurality of tube sections of different diameters, it is common practice to protect each tube section with a separate sheath. However, the measures not only have poor protection effect, but also have poor flatness of the outer wall of the plastic coating layer at the lap joint of different sheaths, and have complex sleeving process and poor adaptability. The "vector telescoping" of the vector telescoping continuity sheath 100 of the present application refers to a casing segment having both an outwardly expanding function and a casing segment having an inwardly contracting function to accommodate the configuration of the inner tube 200 in FIG. 1. Specifically, the vector telescoping continuous sheath 100 includes at least one first sheath segment 110 that is radially elastic and outwardly expandable upon natural deployment; also included is at least one second casing section 120 having thermal shrinkage in the radial direction, capable of shrinking inwardly under heat on a natural basis; wherein all of the first casing segments 110 and all of the second casing segments 120 together form a continuous casing structure.

The configuration of the vector telescoping continuous sheath 100 in FIG. 1 includes 1 first sheath segment 110 and 2 second sheath segments 120. Wherein the first casing pipe section 110 is used to expand and then to be fitted to a pipe section of the inner pipe 200 having a size larger than its natural inner diameter. Depending on the configuration of the inner tube 200, a plurality of first casing segments 110 may also be provided, and different first casing segments 110 may have different maximum expansion rates. The inner diameter of the second casing pipe section 120 in a natural state before being sleeved is larger than the outer diameter of the inner pipe section 200 to be sleeved and protected, and different second casing pipe sections 120 can have different shrinkage rates so as to be more closely attached to pipe sections of the inner pipes 200 with different diameters through heat shrinkage.

In some embodiments, the first casing section 110 and the second casing section 120 are both braided casings, and the vector stretch continuous sheath 100 is made by a continuous braiding process, i.e., the different casing sections are also connected by braiding. The production equipment for the braided sleeve weaves yarns of different materials into tubular fabrics, does not need the heating, cooling and other processes of extrusion equipment, and has relatively simple integral process scheme; when the yarn with the heat shrinkage performance is adopted, the further treatment such as cross-linking, expansion molding and the like can be carried out after the weaving is finished. As a variation, the vector stretching continuous sheath 100 of the present application can also be manufactured by an extrusion process, for example, a continuous sheath can be manufactured by mixing and granulating a plurality of raw materials with different components by segments through an extruder, and a finished product is manufactured through subsequent processing, so that the vector stretching function of the present application can also be realized.

In some embodiments, the aforementioned continuous knitting process is a weft knitting process. Unlike the more common warp and weft knitting process, the weft knitting process involves feeding one or more yarns from the weft direction onto the working needles of a knitting machine, sequentially bending the yarns into loops, and interlooping to form a weft knitted fabric. The machines used to knit such knitted fabrics are known as weft knitting machines. Weft knitting has great adaptability to the types and linear densities of processed yarns, and the varieties of produced knitted fabrics are wide, for example, various yarns can be flexibly adopted according to the application scene of the sheath, and different yarn densities can be set according to requirements to realize the specific performance of the sheath, such as maximum expansion ratio and the like. Weft knitted fabrics are of a wide variety and can be woven not only as grey fabrics of various textures but also as single-piece shaped and partially shaped products, such as the tubular sheaths of the present application. Meanwhile, the technical process and the machine structure of the weft knitting are simple, the operation is easy, and the production efficiency of the machine is high, so that the weft knitting process is suitable for the batch production of the continuous sheath, and is particularly suitable for the continuous sheath of the pipe section with the outward and inward stretching function. When different sleeve sections are woven by yarns of different materials, the yarns of different materials can be connected into the same yarn through a thread-proofing process, and the yarns of different materials can be connected before weaving; and the spindle can be replaced and yarns of different materials can be connected in the weaving process, and then the weaving can be continued.

In some embodiments, the weave structure of the weft knitting process is at least one of a weft plain weave, a rib weave, and a links-links weave. The weft plain weave is also called plain weave, and is a simple and common single-sided weave in knitted fabrics. The weft plain weave is formed by mutually stringing and sleeving continuous unit coils, and the size, the shape and the structure of each coil on the same surface of the fabric are completely the same. The front surface of the weft plain weave is even and flat, the longitudinal breaking strength of the fabric is larger than that of the fabric in the transverse direction, and the fabric is suitable for casing sections with small expansion multiplying power or contraction multiplying power. The rib stitch is a basic stitch of a double-sided weft knitted fabric, and is a stitch formed by a front wale and a back wale. Each course of the rib weave is woven by one yarn, so that the front side loop and the back side loop are woven, the front side and the back side of the fabric are the same, and the appearance of the front side loop is presented. The rib weave is an elastic weave, and has larger extensibility and elasticity when the fabric is stretched in the transverse direction, and the elasticity is better when the density is higher. The rib weave is a double-sided structure, the fabric is not easy to curl and loose, and the sleeve is suitable for a sleeve section with larger expansion multiplying power or contraction multiplying power. On the occasion of higher strength requirement but low elasticity requirement, the interlock texture can also be adopted. The double-reverse side tissue is formed by alternately arranging a front side coil row and a reverse side coil row. The appearance of the weft plain reverse side was presented on both sides of the fabric. The double-reverse side weave shortens the fabric longitudinally due to the inclination of the circle cylindrical surface, and increases the longitudinal density and the thickness of the fabric. The fabric has greater extensibility and elasticity in the longitudinal direction, which, when applied to the present application, increases the flexibility of the sheath to changes in the diameter of the inner tube 200.

In some embodiments, in a natural state, all of the first casing sections 110 and all of the second casing sections 120 are the same diameter. As shown in FIG. 2, the entire vector telescoping continuous sheath 100 is a single diameter tubular structure, which is not only convenient for packaging and transportation, but also has strong adaptability and can be used for inner tubes 200 with a wide diameter variation range. For example, referring to fig. 3, the inner tube 200 includes 3 tube segments of different diameters, wherein the diameter of the first inner tube segment 210 is 1.3 times the diameter of the second inner tube segment 220, and the diameter of the third inner tube segment 230 is 1/2.5 the diameter of the second inner tube segment 220, based on the diameter of the second inner tube segment 220. At this time, the natural diameter of the vector telescoping continuous sheath 100 in fig. 2 may be set to be slightly larger than the diameter of the second inner tube section 220, and the sheath is sleeved from the right side of the inner tube 200, then the first sheath section 110 is mechanically expanded and sleeved to the first inner tube section 210, 1 second sheath section 120 is slightly heat-shrunk by heating and then attached to the second inner tube section 220, and the other 1 second sheath section 120 is heat-shrunk by about 2.5 times and then attached to the third inner tube section 230, so as to form the plastic-covered tube structure in fig. 1.

However, as a variation, the vector telescoping continuous sheath 100 may have different diameters in the natural state, particularly between the first sheath segment 110 and the second sheath segment 120, and between different second sheath segments 120, and specifically different second sheath segments 120 may be made to have different diameters through different cross-linking and expansion-setting processes. Portions of the length of the same casing section may also be formed into a transition section of varying diameter by a braiding process or a subsequent treatment process.

In some embodiments, the vector telescoping continuous sheath 100 includes at least 2 first sheath segments 110 having different maximum expansion ratios, or at least 2 second sheath segments 120 having different contraction ratios, which may also be combined to accommodate various inner tube 200 configurations. In the embodiment of fig. 1 only 1 first casing section 110 is included, but a plurality of first casing sections 110 with different maximum expansion ratios can also be arranged in succession by switching yarns of different materials or different elasticity in a continuous weaving process. The embodiment of fig. 1 includes 2 second casing sections 120 having different contraction ratios, but 1 second casing section 120 having the same contraction ratio may be used. The first casing segment 110 and the second casing segment 120 may also be alternately arranged at intervals.

In some embodiments, the first casing section 110 is made of a multifilament fiber weave having elasticity. The multifilament fiber includes multifilament yarn woven by any one material or a mixture of materials of polyethylene fiber, polyester fiber, and nylon fiber. The multifilament fiber has the advantages of high strength, wear resistance, elasticity and the like, and can realize the outward expansion rate of 1-1.5 times or even higher than that of the first casing pipe section 110. For example, fig. 4 is a schematic view showing a specific structure of a first casing pipe section 110 having a weft-plain weave woven from first multifilament fibers 111 having elasticity.

In some embodiments, the second casing section 120 is woven from heat shrinkable monofilaments 121. The heat shrinkage rate of the uncrosslinked heat-shrinkable monofilaments 121 is preferably in the range of 50% to 80%, and the heat shrinkage rate after crosslinking treatment is preferably in the range of 70% to 90%, so that the shrinkage rate of the second casing pipe section 120 can be 1-3 times or even higher. By combining the expansion ratio of the first casing pipe section 110, the vector telescopic continuous sheath 100 with a single diameter can realize the protection of the inner pipe 200 with the diameter variation range of 4.5 times or even higher, so that the technical scheme of the application has high adaptability. The second sleeve section 120 braided from a single heat shrinkable monofilament 121 is suitable for use in the third inner section 230 where a higher rate of shrinkage is desired. Fig. 6 shows a specific weave structure of a second casing length 120 with a weft-plain weave, woven from a single heat-shrinkable monofilament 121.

The second sleeve section 120 may also be co-braided from multifilament fibers and heat shrinkable monofilaments 121. Wherein the heat shrinkage rate of the multifilament fiber may be set to 20% -40%. The heat shrinkable monofilament 121 has a typical gauge of 0.20 to 0.30mm and a multifilament fiber denier or an elastic multifilament fiber denier of 600D to 2000D. The heat shrinkable monofilament 121 is a cross-linked monofilament made of any one of EVA, PE, PA, and PET. The second sleeve section 120, which is co-braided from multifilament fibers and heat shrinkable monofilaments 121, has higher strength and better abrasion resistance. Fig. 5 shows a specific weave structure of a second casing length 120 having a weft-plain weave, co-woven from a heat-shrinkable monofilament 121 and second multifilament fibres 122. Wherein, parameters such as specific setting density of the heat shrinkable monofilament 121 and the second multifilament 122 can be flexibly set according to the requirement. Different second casing sections 120 may also be made by the same pre-dilation tube by treating it with different cross-linking processes, or with different expansion rates.

As shown in fig. 1, the plastic-coated pipe provided by the present application comprises an inner pipe 200 and the vector telescoping continuous sheath 100 of the previous embodiment; wherein, the vector flexible continuous sheath 100 is sleeved on at least part of the length of the inner tube 200 to form a plastic-coated protective layer; the first casing pipe section 110 is outwardly expanded and sleeved to a portion of the inner pipe 200 having a larger diameter, and the second casing pipe section 120 is inwardly contracted and attached to the inner pipe 200 under a heated condition after being sleeved to a portion of the inner pipe 200 having a smaller diameter. The inner tube 200 may be made of metal or of a polymer material. In practice, the specific structure of the vector telescoping continuous sheath 100, such as the number and position of the first and second sheath segments 110 and 120, the diameter of each sheath segment in the natural state, the material of the multifilament fibers and the heat shrinkable monofilaments 121, the thread diameter and density, etc., may be appropriately set according to the specific structure of the inner tube 200.

The vector telescopic continuous sheath 100 of the present application can be applied to protection of an automobile wire harness, wire end processing and welding point protection and identification, appearance protection of electronic devices, protection of antennas, and protection of other elongated structures with regular sections or irregular sections, in addition to protection of pipelines.

The foregoing is only a preferred embodiment of the present application and the technical principles employed, and various obvious changes, rearrangements and substitutions may be made without departing from the spirit of the application. Other advantages and benefits of the present application will be readily apparent to those skilled in the art from the disclosure provided herein. The present application is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the present application. The features in the above embodiments and embodiments may be combined with each other without conflict.

Claims (10)

1. A vector telescoping continuity sheath for sheathing a structure to be protected to form a protective surface, comprising:

at least a first casing section, having elasticity in a radial direction, and being expandable outward in a natural state;

at least a second casing section having heat-shrinkable properties in the radial direction and being shrinkable inwardly under heat in a natural state;

wherein all of the first casing section and the second casing section form a continuous casing structure.

2. The vector telescoping continuity jacket of claim 1,

the first casing pipe section and the second casing pipe section are both woven casings, and the vector telescopic continuous sheath is manufactured through a continuous weaving process.

3. The vector telescoping continuity jacket of claim 2,

the continuous weaving process is a weft knitting process.

4. The vector telescoping continuity jacket of claim 3,

the weave structure of the weft knitting process is at least one of a weft plain weave, a rib weave and a links-links weave.

5. The vector telescoping continuity sheath of any one of claims 1-4,

comprising at least 2 of said first casing sections having different maximum expansion ratios,

and/or, at least 2 of said second casing lengths having different shrinkage rates.

6. The vector telescoping continuity sheath of any one of claims 1-4,

in a natural state, all the first casing pipe sections and all the second casing pipe sections have the same diameter, and a single-diameter vector telescopic continuous sheath is formed.

7. The vector telescoping continuity sheath of any one of claims 1-4,

the first casing pipe section is made of elastic multifilament fiber weaving.

8. The vector telescoping continuity sheath of any one of claims 1-4,

the second casing pipe section is formed by weaving multifilament fibers and heat-shrinkable monofilaments, or the second casing pipe section is formed by weaving the heat-shrinkable monofilaments.

9. The vector telescoping continuity jacket of claim 8,

different said second casing lengths are made by the same reaming process with different cross-linking treatments,

and/or with different expansion rates.

10. A plastic-coated pipe is characterized in that,

comprising an inner tube and the vector telescoping continuity sheath of any one of claims 1-9;

the vector telescopic continuous sheath is sleeved on at least part of the length of the inner pipe to form a plastic-coated protective layer; the first casing pipe section is outwards expanded and sleeved to the partial length of the inner pipe, and the second casing pipe section is sleeved to the partial length of the inner pipe and then inwards shrunk and attached to the inner pipe under the heated condition.

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