Cable with reliable inner sheath tube

Abstract

The utility model relates to a cable with a reliable inner sheath tube, which comprises a cable core, an insulating layer is arranged outside the cable core, a shielding layer is arranged outside the insulating layer, an oxygen isolation layer is arranged outside the shielding layer, a flame-retardant filling area is arranged outside the oxygen isolation layer, an inner sheath layer is arranged outside the flame-retardant filling area, and an outer sheath layer is arranged outside the inner sheath layer. A buffer layer is arranged on the outer side of the inner sheath layer, a sealing covering layer is arranged on the outer side of the buffer layer, and a connecting shell is arranged on the outer side of the sealing covering layer. A connecting thread ring is arranged on the outer side of the front end of the connecting shell, the rear side of the connecting thread ring is in threaded connection with a cable elbow, the other end of the cable elbow is connected with an anti-twisting pipe, the connecting shell is arranged, it is ensured that the cable is convenient to bend and good in anti-twisting effect, an oxygen isolation layer is arranged, oxygen is prevented from entering the cable, and the stability of the cable is ensured; and the buffer layer ensures that the anti-pressure capability of the cable is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cable with a reliable inner sheath tube. Background Art

[0002] With the development of the national economy, the demand for electricity is getting higher and higher. As one of the carriers for power transmission, power cables are also used more and more. At the same time, with the acceleration of the informatization speed, the coverage range of communication cables used as communication carriers is also becoming wider and wider. Some current cables are in an exposed working environment, and some working environments are even very harsh, and various unexpected situations may be encountered, such as being distorted by external forces, which will greatly reduce the service life of the cables and cause unexpected dangers. Moreover, the existing cables have poor resistance to bending and compression, and poor sealing and flame retardant effects.

[0003] Patent No. CN201821874219.4 discloses a highly reliable power cable. Through the power cable, a number of power cable gripping pads are evenly arranged on both outer sides of the power cable. A power cable cross-section is arranged inside the power cable. The outermost side of the power cable cross-section is sleeved with a power cable outer sheath. A power cable inner sheath is arranged inside the power cable outer sheath. A wire removing steel wire is arranged at the central position inside the power cable inner sheath. The outer side of the wire removing steel wire is connected to the inner wall of the power cable inner sheath through three partition layers respectively. The partition layers evenly divide the cross-section of the power cable inner sheath into three pieces. The structure is compact and convenient for gripping and using. It has the functions of high temperature resistance, wear resistance, corrosion resistance, fire prevention and flame retardancy, and insulation isolation. It has a long service life and high safety, effectively preventing the deformation of the internal lines of the cable caused by external forces. At the same time, it is environmentally friendly and practical. However, this cable has the following problems: First, the flame retardant effect is not good and the anti-twisting ability is poor. Second, the bending and fixing effect is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art. By setting a connecting shell, it ensures that the cable is convenient to bend and has a good anti-twisting effect. Secondly, an oxygen isolation layer is set to prevent oxygen from entering the inside of the cable and ensure the stability of the cable. Moreover, through the buffer layer, the technical problems of weak compressive resistance, poor anti-impact effect, easy breakage during bending, and poor flame retardant effect in the prior art are solved.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A cable with a reliable inner sheath tube, comprising a cable core, an insulating layer is provided outside the cable core, a shielding layer is provided outside the insulating layer, an oxygen isolation layer is provided outside the shielding layer, a flame retardant filling area is provided outside the oxygen isolation layer, an inner sheath layer is provided outside the flame retardant filling area, a buffer layer is provided outside the inner sheath layer, a sealing cover layer is provided outside the buffer layer, and a connecting shell is provided outside the sealing cover layer;

[0007] Connecting shell, a connecting thread ring is provided outside the front end of the connecting shell, the cable elbow is threadedly connected to the rear side of the connecting thread ring, and the other end of the cable elbow is connected to an anti-twist tube.

[0008] As a preference, the oxygen isolation layer is an oxygen isolation material layer, the flame retardant filling area is a silicone filler layer, and the inner sheath layer is a cross-linked polyethylene inner sheath layer.

[0009] As a preference, fireproof and flame retardant rubber strips are evenly arranged in the buffer layer, the cross-section of the fireproof and flame retardant rubber strips is circular, and the sealing cover layer is a sealing rubber skin layer.

[0010] As a preference, a tearing rope layer is adhered to the inner wall of the inner sheath layer, a woven mesh layer is adhered to the outside of the tearing rope layer, and the woven mesh layer is a polyester mesh layer.

[0011] As a preference, the outer surface of the front end of the cable elbow is provided with threads, and the front end of the cable elbow is threadedly connected to the connecting thread ring. The outer surface of the front end of the connecting thread ring is provided with the same threads, and an inner thread ring is provided on the lower side of the rear end of the cable elbow.

[0012] As another preference, the upper end of the anti-twist tube is threadedly connected to the inner thread ring, the diameter of the upper port of the anti-twist tube is larger than that of the lower port, and the lower end of the anti-twist tube is in contact connection with the sealing cover layer.

[0013] The beneficial effects of the present utility model:

[0014] (1) In the present utility model, by setting an oxygen isolation layer, by adding an oxygen isolation layer composed of a special oxygen isolation material, the flame retardant performance of the cable is improved. When the cable encounters an open fire and burns, the oxygen isolation material can precipitate a large amount of water to reduce the environmental temperature and form a non-melting and non-combustible alumina hard shell, thereby isolating the contact between the insulating organic matter and the outside air. This mechanism ultimately enables the cable to achieve the purpose of self-extinguishing, greatly improving the flame retardant level and can reach the A-level flame retardant level.

[0015] (2) In the present utility model, by setting a buffer layer and using fireproof and flame retardant rubber strips, it can not only improve the fireproof and flame retardant performance of the cable, but also ensure that the cable has strong compressive capacity, good anti-impact effect and does not affect the bending of the cable.

[0016] (3) In the present utility model, by providing a connection housing and using one end diameter of the anti-twist tube to contact and seal the covering layer, the cable can be prevented from twisting inside. On the other side, threads are provided to facilitate the connection of subsequent bent cables.

[0017] In summary, the cable has the advantages of good impact resistance, good flame retardant effect, ensuring convenient bending of the cable, and good anti-twist effect, and is particularly suitable for the field of cable technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the thread in the present utility model.

[0021] Figure 3 It is a schematic diagram of the position structure of the oxygen shielding layer in the present utility model.

[0022] Figure 4 It is a schematic diagram of the structure of the tearing cord layer in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings.

[0024] Embodiment 1

[0025] As Figures 1 to 4 shown, the present utility model provides a cable with a reliable inner sheath tube, including a cable core 1, an insulating layer 2 is provided outside the cable core 1, a shielding layer 3 is provided outside the insulating layer 2, an oxygen isolation layer 4 is provided outside the shielding layer 3, a flame retardant filling area 5 is provided outside the oxygen isolation layer 4, an inner sheath layer 6 is provided outside the flame retardant filling area 5, a buffer layer 7 is provided outside the inner sheath layer 6, a sealing covering layer 8 is provided outside the buffer layer 7, and a connection housing 9 is provided outside the sealing covering layer 8;

[0026] For the connection housing 9, a connection thread ring 91 is provided outside the front end of the connection housing 9, the connection thread ring 91 is threadedly connected to a cable elbow 92 at the rear side, and the other end of the cable elbow 92 is connected to an anti-twist tube 93.

[0027] Furthermore, the oxygen isolation layer 4 is an oxygen isolation material layer, the flame retardant filling area 5 is a silicone filler layer, and the inner sheath layer 6 is a cross-linked polyethylene inner sheath layer. The setting of the oxygen isolation layer 4 adds an oxygen isolation layer 4 composed of a special oxygen isolation material to improve the flame retardant performance of the cable. When the cable encounters an open fire and burns, the oxygen isolation material can release a large amount of water to reduce the environmental temperature and form a non-melting and non-combustible alumina hard shell, thereby isolating the contact between the insulating organic matter and the outside air.

[0028] Furthermore, fireproof and flame retardant rubber strips 71 are evenly arranged in the buffer layer 7. The cross-section of the fireproof and flame retardant rubber strips 71 is circular. The sealing cover layer 8 is a sealing rubber skin layer. The fireproof and flame retardant rubber strips 71 with a circular cross-section can effectively protect the cable, have good impact resistance and strong compressive capacity, and there are gaps between the circles for convenient heat dissipation.

[0029] Furthermore, a tearing rope layer 61 is adhered to the inner wall of the inner sheath layer 6, and a woven mesh layer 62 is adhered to the outside of the tearing rope layer 61. The woven mesh layer 62 is a polyester mesh layer. The tearing rope layer 61 and the woven mesh layer 62 can increase the strength of the cable, improve the toughness of the cable, and extend the service life of the cable.

[0030] Furthermore, external threads 921 are provided on the outer surface of the front end of the cable elbow 92, and the front end of the cable elbow 92 is threadedly connected to the connecting thread ring 91. The same external threads 921 are provided on the outer surface of the front end of the connecting thread ring 91, and an internal thread ring 922 is provided on the lower side of the rear end of the cable elbow 92. The connecting housing 9 is used to provide a bending joint for the outside of the cable to prevent the cable from being twisted and affecting its service life. The external threads 921 are for convenient connection with other joints, facilitating the installation of the cable and ensuring the connection tightness.

[0031] Furthermore, the upper end of the anti-twist tube 93 is threadedly connected to the internal thread ring 922, and the upper port diameter of the anti-twist tube 93 is larger than the lower port diameter. The lower end of the anti-twist tube 93 is in contact connection with the sealing cover layer 8. The anti-twist tube 93 is set to have a larger diameter at one end and a smaller diameter at the other end, and the diameter of the smaller end is exactly the same as the diameter of the cable, which can effectively prevent the cable from being twisted and affecting the service life of the cable.

[0032] Working process: The insulating layer 2 of the cable is used for insulation protection, the shielding layer 3 is used for signal shielding, the oxygen isolation layer 4 ensures good flame retardant effect, the flame retardant filling area 5 further increases the flame retardant effect of the cable. The inner sheath layer 6 has a tearing rope layer 61 and a braided mesh layer 62 adhered to its inner wall, which increases the strength of the cable, improves the toughness of the cable, and extends the service life of the cable. Then, the buffer layer 7 ensures the impact resistance and compressive resistance of the cable, and the sealing cover layer 8 seals and protects the entire cable. The provided connecting housing 9 facilitates the insertion and bending of the cable, and the anti-twist tube 93 prevents the uncontrollable twisting of the cable, which affects the overall service life. The entire cable has good flame retardant effect, excellent toughness, good anti-twist effect, convenient connection, and long overall service life.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0034] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation to the quantity.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art under the technical inspiration of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A cable with a reliable inner sheath tube, characterized in that: include A cable core (1), wherein an insulating layer (2) is provided on the outer side of the cable core (1), a shielding layer (3) is provided on the outer side of the insulating layer (2), an oxygen isolation layer (4) is provided on the outer side of the shielding layer (3), a flame retardant filling area (5) is provided on the outer side of the oxygen isolation layer (4), an inner sheath layer (6) is provided on the outer side of the flame retardant filling area (5), a buffer layer (7) is provided on the outer side of the inner sheath layer (6), a sealing covering layer (8) is provided on the outer side of the buffer layer (7), and a connecting shell (9) is provided on the outer side of the sealing covering layer (8); A connecting shell (9) is provided with a connecting threaded ring (91) on the outer side of the front end of the connecting shell (9), the rear side of the connecting threaded ring (91) is threadedly connected to a cable elbow (92), and the other end of the cable elbow (92) is connected to an anti-twisting tube (93).

2. A cable with a reliable inner sheath tube according to claim 1, characterized in that: The oxygen isolation layer (4) is an oxygen isolation material layer, the flame retardant filling area (5) is an organic silicon filler layer, and the inner sheath layer (6) is an inner sheath layer made of a cross-linked polyethylene material.

3. A cable with a reliable inner sheath tube according to claim 1, characterized in that: Fireproof and flame-retardant rubber strips (71) are evenly arranged in the buffer layer (7), and the cross section of the fireproof and flame-retardant rubber strips (71) is circular. The sealing covering layer (8) is a sealing rubber layer.

4. A cable with a reliable inner sheath tube according to claim 1, characterized in that: The inner wall of the inner sheath layer (6) is adhered with a tear rope layer (61), and the outer side of the tear rope layer (61) is adhered with a woven mesh layer (62), and the woven mesh layer (62) is a polyester mesh layer.

5. A cable with a reliable inner sheath tube according to claim 1, characterized in that: The outer surface of the front end of the cable bend (92) is provided with a thread (921), and the front end of the cable bend (92) is threadedly connected to the connecting thread ring (91), the outer surface of the front end of the connecting thread ring (91) is provided with the same thread (921), and the lower side of the rear end of the cable bend (92) is provided with an internal thread ring (922).

6. A cable with a reliable inner sheath tube according to claim 5, characterized in that: The upper end of the anti-twist tube (93) is threadedly connected to the internal thread ring (922), and the diameter of the upper end of the anti-twist tube (93) is larger than the diameter of the lower end. The lower end of the anti-twist tube (93) is in contact with the sealing covering layer (8).

Images