Copper core polyvinyl chloride insulation flexible cable

Abstract

The utility model discloses a copper core polyvinyl chloride insulation flexible cable, which comprises an outer sheath, an inner sheath, an insulation sleeve and copper wires, and is characterized in that an outer buffer sleeve and an inner buffer sleeve which are used for supporting and fixing the insulation sleeve are arranged in the inner sheath; a central sleeve used for wrapping the insulating sleeves is arranged between the outer buffer sleeve and the inner buffer sleeve and located at the positions of the insulating sleeves, the inner surface of the outer buffer sleeve and the outer surface of the inner buffer sleeve are arranged in a clearance fit mode, and sleeve cores used for wrapping the insulating sleeves are arranged between the central sleeve and the insulating sleeves. Through mutual cooperation of an inner buffer sleeve, a central sleeve, an outer buffer sleeve, a buffer cavity, a sleeve core, a first reinforcing strip and a second reinforcing strip, by using the uniformly distributed wrapping mode, on one hand, the insulation sleeve can be buffered and protected, the wear degree of a copper wire is reduced, and on the other hand, the insulation sleeve can be far away from high temperature; the twisted ribs are arranged on the outer surface of the outer sheath, so that the contact area between the outer sheath and soil can be increased, and the friction at the joint is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and particularly relates to a copper core polyvinyl chloride insulated soft cable. Background Art

[0002] Cable is a device for transmitting electric energy or signals, usually composed of several or several groups of wires. Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc.

[0003] Existing copper-core polyvinyl chloride insulated flexible cables generally include copper conductors, PVC (polyvinyl chloride) insulating sleeves and outer sheaths. When in use, the PVC insulating sleeves will first wrap multiple groups of copper conductors, and then the outer sheaths will be used to wrap multiple groups of the PVC insulating sleeves. Using this wrapping method, when harsh working conditions such as trampling and squeezing occur, the wear between the copper conductors may increase and the service life of the copper conductors may be reduced. For this purpose, a copper-core polyvinyl chloride insulated flexible cable is provided. Utility Model Content

[0004] The utility model aims to provide a copper core polyvinyl chloride insulated flexible cable to solve the technical problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a copper core polyvinyl chloride insulated flexible cable, comprising an outer sheath, an inner sheath, an insulating sheath and copper wire, the inner sheath is located inside the outer sheath, the insulating sheath is arranged inside the inner sheath in a ring shape with equal intervals, the copper wire is wound inside the insulating sheath, an outer buffer sheath and an inner buffer sheath for supporting and fixing the insulating sheath are arranged inside the inner sheath, a central sheath for wrapping the insulating sheath is arranged between the outer buffer sheath and the inner buffer sheath at each insulating sheath position, the inner surface of the outer buffer sheath and the outer surface of the inner buffer sheath are gap-matched, the outer buffer sheath, the central sheath and the inner buffer sheath are integrally formed, the outer buffer sheath, the central sheath and the inner buffer sheath are all made of polyvinyl chloride material, a sheath core for covering the insulating sheath is arranged between the central sheath and the insulating sheath, a buffer cavity is arranged between the sheath core and the central sheath in a ring shape with equal intervals, and a first reinforcement strip and a second reinforcement strip are arranged inside the buffer cavity.

[0006] Preferably, the first reinforcement strips and the second reinforcement strips are cross-distributed, and the central sleeve, the first reinforcement strips, the second reinforcement strips and the sleeve core are integrally formed.

[0007] Preferably, a first filler is arranged inside the inner buffer sleeve, and the first filler is a PP rope, and the PP rope is made of polypropylene material. A second filler is arranged between the outer buffer sleeve and the inner buffer sleeve and between two adjacent groups of central sleeves, and the second filler is cotton thread.

[0008] Preferably, the outer surface of the outer sheath is provided with twisted bars in an annular shape at equal intervals, the twisted bars are integrally formed with the outer sheath, and an inner wrapping belt for fastening and protecting the outer buffer sheath is provided between the outer buffer sheath and the inner sheath.

[0009] Preferably, a shielding sleeve is arranged outside the inner sheath, a flame retardant sleeve is arranged outside the shielding sleeve, and the flame retardant sleeve is made of silicone material.

[0010] Preferably, aluminum-magnesium alloy steel wire armor is arranged in a ring shape at equal intervals outside the flame retardant sleeve, and an outer wrapping belt for wrapping and fastening the aluminum-magnesium alloy steel wire armor is arranged between the aluminum-magnesium alloy steel wire armor and the outer sheath.

[0011] The utility model provides a copper core polyvinyl chloride insulated flexible cable with the following advantages:

[0012] 1. The utility model, through the cooperation of the inner buffer sleeve, the central sleeve, the outer buffer sleeve, the buffer cavity, the sleeve core, the first reinforcement strip and the second reinforcement strip, utilizes this evenly distributed wrapping method, on the one hand, it can buffer and protect the insulating sleeve, reduce the wear of the copper wire, and increase the service life of the copper wire; on the other hand, it can keep the insulating sleeve away from high temperature and reduce the possibility of damage to the insulating sleeve.

[0013] 2. The utility model can increase the contact area between the outer sheath and the soil and improve the friction at the joint by arranging twisted bars on the outer surface of the outer sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is the overall structural plan of the utility model;

[0017] Figure 3 It is a schematic diagram of the planar structure of the inner buffer sleeve and the outer buffer sleeve of the utility model;

[0018] Figure 4 For the utility model Figure 3 A magnified view of the structure in the middle.

[0019] Explanation of marks in the figure: 1. Outer sheath; 2. Inner sheath; 3. Inner buffer sleeve; 301. First filler; 4. Outer buffer sleeve; 401. Second filler; 5. Central sleeve; 501. Buffer cavity; 502. Sleeve core; 503. First reinforcement strip; 504. Second reinforcement strip; 6. Twisted reinforcement; 7. Insulating sleeve; 8. Copper wire; 9. Inner wrapping tape; 10. Shielding sleeve; 11. Flame retardant sleeve; 12. Outer wrapping tape; 13. Aluminum-magnesium alloy steel wire armor. DETAILED DESCRIPTION

[0020] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0021] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0025] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a copper core polyvinyl chloride insulated flexible cable of the utility model in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, the utility model is a copper core polyvinyl chloride insulated flexible cable, comprising an outer sheath 1, an inner sheath 2, an insulating sheath 7 and a copper wire 8. The inner sheath 2 is located inside the outer sheath 1, and the insulating sheath 7 is arranged inside the inner sheath 2 in a ring shape with equal intervals. The copper wire 8 is wound inside the insulating sheath 7. The outer sheath 1, the inner sheath 2 and the insulating sheath 7 are all made of polyvinyl chloride. In the device, an outer buffer sheath 4 and an inner buffer sheath 3 for supporting and fixing the insulating sheath 7 are arranged inside the inner sheath 2. The inner surface of the outer buffer sheath 4 and the outer surface of the inner buffer sheath 3 are gap-matched. A central sheath 5 for wrapping the insulating sheath 7 is arranged between the outer buffer sheath 4 and the inner buffer sheath 3 at each insulating sheath 7 position. The outer buffer sheath 4, the central sheath 5 and the inner buffer sheath 3 are integrally formed, and the outer buffer sheath 4, the central sheath 5 and the inner buffer sheath 3 are all made of polyvinyl chloride.

[0027] Specifically, a first filler 301 is arranged inside the inner buffer sleeve 3. The first filler 301 is a PP rope, and the PP rope is made of polypropylene, which has the advantages of being non-absorbent, corrosion-resistant, mildew-resistant, wear-resistant, and having a long service life. A second filler 401 is arranged between the outer buffer sleeve 4 and the inner buffer sleeve 3 and between two adjacent groups of central sleeves 5. The second filler 401 is a cotton thread, which has the characteristics of being soft, having a good termination effect, and being resistant to high temperature, and can effectively improve the bending performance and tensile strength of the cable. A core 502 for covering the insulating sleeve 7 is arranged between the central sleeve 5 and the insulating sleeve 7. A buffer cavity 501 is arranged in a circular shape with equal intervals between the core 502 and the central sleeve 5. A first reinforcement strip 503 and a second reinforcement strip 504 are arranged inside the buffer cavity 501. The first reinforcement strip 503 and the second reinforcement strip 504 are cross-distributed, and the central sleeve 5, the first reinforcement strip 503, the second reinforcement strip 504, and the core 502 are integrally formed.

[0028] Specifically, the outer surface of the outer sheath 1 is provided with twisted bars 6 at equal intervals in the shape of a ring, which are used to increase the contact area between the outer sheath 1 and the soil and improve the friction at the joint. The twisted bars 6 are integrally formed with the outer sheath 1, and an inner wrapping belt 9 is provided between the outer buffer sleeve 4 and the inner sheath 2 for fastening and protecting the outer buffer sleeve 4, which can effectively prevent external factors from damaging the outer buffer sleeve 4 and extend the service life of the outer buffer sleeve 4. A shielding sleeve 10 is provided on the outside of the inner sheath 2 to avoid local discharge of the cable, and a flame retardant sleeve 11 is provided on the outside of the shielding sleeve 10 to isolate the cable from fire and avoid damage to the cable by fire. The flame retardant sleeve 11 is made of silicone material, and aluminum-magnesium alloy steel wire armor 13 is provided on the outside of the flame retardant sleeve 11 in the shape of a ring with equal intervals to improve the overall strength of the cable, and an outer wrapping belt 12 is provided between the aluminum-magnesium alloy steel wire armor 13 and the outer sheath 1 to wrap and fasten the aluminum-magnesium alloy steel wire armor 13.

[0029] According to the above, the utility model cooperates with the inner buffer sleeve 3, the central sleeve 5, the outer buffer sleeve 4, the buffer cavity 501, the sleeve core 502, the first reinforcement strip 503 and the second reinforcement strip 504, and utilizes this evenly distributed wrapping method. On the one hand, it can buffer and protect the insulating sleeve 7, reduce the wear of the copper wire 8, and increase the service life of the copper wire 8. On the other hand, it can keep the insulating sleeve 7 away from high temperature and reduce the possibility of damage to the insulating sleeve 7. The utility model increases the contact area between the outer sheath 1 and the soil and improves the friction at the joint by arranging the twisted reinforcement 6 on the outer surface of the outer sheath 1.

[0030] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A copper core polyvinyl chloride insulated flexible cable, comprising an outer sheath (1), an inner sheath (2), an insulating sheath (7) and a copper wire (8), wherein the inner sheath (2) is located inside the outer sheath (1), the insulating sheath (7) is arranged inside the inner sheath (2) in an annular shape and at equal intervals, and the copper wire (8) is wound inside the insulating sheath (7), characterized in that: An outer buffer sleeve (4) and an inner buffer sleeve (3) for supporting and fixing the insulating sleeve (7) are arranged inside the inner sleeve (2); a central sleeve (5) for wrapping the insulating sleeve (7) is arranged between the outer buffer sleeve (4) and the inner buffer sleeve (3) at each position of the insulating sleeve (7); the inner surface of the outer buffer sleeve (4) and the outer surface of the inner buffer sleeve (3) are arranged with clearance fit; the outer buffer sleeve (4), the central sleeve (5) and the inner buffer sleeve (3) are integrally formed; the outer buffer sleeve (4), the central sleeve (5) and the inner buffer sleeve (3) are all made of polyvinyl chloride; a sleeve core (502) for wrapping the insulating sleeve (7) is arranged between the central sleeve (5) and the insulating sleeve (7); a buffer cavity (501) is arranged in a circular shape with equal spacing between the sleeve core (502) and the central sleeve (5); a first reinforcement strip (503) and a second reinforcement strip (504) are arranged inside the buffer cavity (501).

2. A copper core polyvinyl chloride insulated flexible cable according to claim 1, characterized in that: The first reinforcement strips (503) and the second reinforcement strips (504) are cross-distributed, and the central sleeve (5), the first reinforcement strips (503), the second reinforcement strips (504), and the sleeve core (502) are integrally formed.

3. The copper core polyvinyl chloride insulated flexible cable according to claim 1, characterized in that: A first filler (301) is arranged inside the inner buffer sleeve (3), and the first filler (301) is a PP rope, and the PP rope is made of polypropylene material. A second filler (401) is arranged between the outer buffer sleeve (4) and the inner buffer sleeve (3) and between two adjacent groups of central sleeves (5), and the second filler (401) is cotton thread.

4. The copper core polyvinyl chloride insulated flexible cable according to claim 1, characterized in that: The outer surface of the outer sheath (1) is provided with twisted bars (6) at equal intervals in a ring shape, and the twisted bars (6) are integrally formed with the outer sheath (1); an inner wrapping belt (9) is provided between the outer buffer sheath (4) and the inner sheath (2) for fastening and protecting the outer buffer sheath (4).

5. The copper core polyvinyl chloride insulated flexible cable according to claim 1, characterized in that: A shielding sleeve (10) is arranged outside the inner sheath (2), a flame retardant sleeve (11) is arranged outside the shielding sleeve (10), and the flame retardant sleeve (11) is made of a silicone material.

6. A copper core polyvinyl chloride insulated flexible cable according to claim 5, characterized in that: The flame retardant sleeve (11) is provided with aluminum-magnesium alloy steel wire armor (13) at equal intervals in a ring shape on the outside, and an outer wrapping belt (12) for wrapping and fastening the aluminum-magnesium alloy steel wire armor (13) is provided between the aluminum-magnesium alloy steel wire armor (13) and the outer sheath (1).

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