CN111223596A

CN111223596A - Bending-resistant cable

Info

Publication number: CN111223596A
Application number: CN202010019750.9A
Authority: CN
Inventors: 李彩章
Original assignee: Hebei Wanfang Cable Group Co ltd
Current assignee: Hebei Wanfang Cable Group Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-06-02

Abstract

The invention discloses a bending-resistant cable, which comprises an internal lead, a cable core isolation layer, an insulation layer, a flame-retardant layer, a wear-resistant layer, a support framework, wear-resistant strips, a buffer structure, an outer protective layer, an insulation shielding layer, an anti-oxidation layer, a waterproof layer, a buffer layer and a reinforcing sheath, wherein the support framework is coated with a second filling layer, the outer ring of the second filling layer is fixedly connected with the wear-resistant strips, the cable core isolation layer is coated on the outer side of a cable core sheath, the wear-resistant layer is coated on the outer side of the flame-retardant layer, the buffer structure is arranged outside the internal lead, the outer layer of the insulation shielding layer is sequentially coated with the anti-oxidation layer and the waterproof layer, the waterproof layer is fixedly connected with a circle of buffer layer, the reinforcing sheath is wound on the outer ring of, buffer layer and buffer structure can receive the cable after buckling and reply in the short time, improve the bending resistance of cable.

Description

Bending-resistant cable

Technical Field

The invention relates to the technical field of electricians, in particular to a cable.

Background

Electrical cables for transmitting electrical energy, communication signals and as conductors, connections and various components essential to electrical equipment are generally formed by twisting several or several groups of at least two conductors, each group being insulated from each other and usually twisted around a center, the whole being covered with a highly insulating covering. The cable has the characteristics of internal electrification and external insulation.

Along with scientific and technological development for the application of cable is more and more extensive, and when the cable was used for the place of frequent bending, because repeated bending or crooked radius are too big, can cause the electrically conductive copper wire fracture of cable, lead to power transmission to break off, and the consumer stops work.

In the existing cable, to above-mentioned problem, mostly just simply adopt the buffer gear that has embedded spring, though the technique can play cushioning effect and certain answer effect to a certain extent, but is difficult to grasp at the cable degree of bending, leads to the excessive spring effect that leads to in the buffer gear of bending easily to and cable inner structure have the friction in the use unavoidably, consequently, need solve these problems urgently.

Disclosure of Invention

The invention aims to solve the technical problems of poor bending effect and poor bending resistance of the existing cable, and discloses a bending-resistant cable.

In order to achieve the purpose, the invention discloses the following technical scheme:

a bending-resistant cable comprises an internal lead, a first filling layer, a cable core sheath, a cable core isolation layer, an insulation layer, a flame-retardant layer, a wear-resistant layer, a first protrusion, a supporting framework, a second filling layer, a wear-resistant strip, a second protrusion, a buffer structure, a buffer sheet, a first spring, an outer protection layer, an insulation shielding layer, an anti-oxidation layer, a waterproof layer, a buffer layer, a groove, a second spring, a pit, a first trapezoidal block, a second trapezoidal block and a reinforcing sheath, wherein the supporting framework is coated with the second filling layer outside, the outer ring of the second filling layer is fixedly connected with the wear-resistant strip, the internal lead is placed between the wear-resistant strips, the first filling layer is arranged in the center of the internal lead, the cable core is arranged outside the first filling layer, the cable core sheath is coated outside the cable core sheath, the cable core isolation layer is uniformly fixed inside the insulation layer in a, insulating layer outside cladding has fire-retardant layer, fire-retardant layer outside cladding has the wearing layer, inside wire is provided with buffer structure outward, and buffer structure fixes on the outer jacket, inside wire and wear-resisting strip are even in turn around outside the sheath inboard, outer jacket outside cladding has the insulation shielding layer, the outer anti-oxidation coating of parcel in proper order of insulation shielding layer, the waterproof layer, the outer fixed connection round buffer layer of waterproof layer, the winding has the one deck to strengthen the crust in the buffer layer outer lane.

Preferably, the supporting framework material is brass.

Preferably, the number of the cable cores is 7 or more than 7.

Preferably, the material of the first filling layer and the second filling layer is PE rubber.

Preferably, the outer surface of the cable core isolation layer is uneven, the concave part and the convex part are arcs with the same radius, and the arc lengths are the same.

Preferably, the wear-resistant strip both sides are provided with the arc wall, and arc wall curvature radius is the same with the wearing layer radius, and fixedly connected with second is protruding in the arc wall, and the first arch of wearing layer outer surface fixedly connected with, first protruding and second protruding structure are the same, collectively are known as protruding, and its shape is the regular tetrahedron that the apex angle is the fillet, and wear-resistant strip, wearing layer and protruding material are the PVC material.

Preferably, buffer structure quantity is 12, and buffer structure skin is the buffer plate, and the buffer plate shape is the shape after two "S" symmetric combinations, the first spring of fixedly connected with in the cavity in the middle of the buffer plate, both ends all with buffer plate fixed connection about the first spring, and buffer structure faces inside wire and wear-resisting strip.

Preferably, the oxidation preventing layer is internally provided with iron-carbon mixed particles.

Preferably, the water-absorbent resin particles are arranged in the waterproof layer.

Preferably, the outer surface of the buffer layer is provided with two grooves, the two grooves are in one group, two adjacent groups of grooves are arranged in a crossed manner, the crossed angle is 90 degrees, and the grooves can be bent in all directions; pits are arranged on two sides in each groove, two pits are arranged in each groove, a second spring is fixedly connected in each pit, a first trapezoidal block and a second trapezoidal block are fixedly connected to the bottom of each groove, the first trapezoidal block and the second trapezoidal block are matched for use, the shapes and the specifications are the same, and the bottom angles of the first trapezoidal block and the second trapezoidal block are 38-43 degrees.

Preferably, the outer sheath material is halogen-free low-smoke flame-retardant polyolefin.

Preferably, the insulating layer and the insulating shield layer may be the same material, and are cross-linked polyethylene.

Preferably, the reinforcing skin material is a high tear resistant silicone rubber.

Has the advantages that:

1. the buffer layer is arranged in the groove, when the spring needs to be bent in daily use, the groove in the buffer layer is convenient for slight bending of the spring, the spring is convenient to use, after the spring is bent to a certain degree, the first trapezoidal block and the second trapezoidal block at the bottom of the groove can limit the further bending of the spring, so that the spring is prevented from being bent excessively, and meanwhile, one half of the second spring in the bent groove is compressed and the other half is stretched, and the spring is easy to recover under the elastic force of the second spring.

2. The buffer structure is arranged in the cable, and after the cable is bent, the buffer sheet and the second spring in the buffer structure have strong elasticity, so that the cable can recover in a short time, and the bending resistance of the cable is improved.

3. The anti-oxidation layer is arranged, and in actual use, the anti-oxidation layer can prevent oxygen in air from entering the anti-oxidation layer; the waterproof layer can be used for adsorbing water vapor or water entering the cable, and aging of the cable is reduced.

4. The wear-resistant strip is arranged, the arc-shaped grooves on the two sides of the wear-resistant strip can well limit the wear-resistant layer and further limit the internal conducting wire, and in the using process, the second protrusions in the arc-shaped grooves and the first protrusions on the outer surface of the wear-resistant layer can increase the resistance between the wear-resistant strip and the wear-resistant layer, reduce the friction times between the wear-resistant strip and the wear-resistant layer, and prolong the service life.

5. The outer surface of the cable core isolation layer adopts an uneven structure, the concave part and the convex part are arcs with the same radius and the arc lengths are the same, and the convex part on the outer surface of the cable core isolation layer can be clamped into the concave part of the cable core isolation layer in the using process, so that the mutual limiting effect is achieved, the friction times between the concave part and the convex part can be reduced, and the service life is prolonged.

Drawings

Fig. 1 is a sectional view of the overall structure of the present invention.

Fig. 2 is a schematic view of the internal conductive wire structure of the present invention.

Figure 3 is a schematic structural diagram of a cable core isolation layer of the invention.

Fig. 4 is a schematic structural view of the wear-resistant layer of the present invention.

Fig. 5 is a schematic view of the structure of the wear strip of the present invention.

Fig. 6 is a schematic structural view of the first protrusion or the second protrusion.

Fig. 7 is a schematic structural diagram of a buffer layer according to the present invention.

Fig. 8 is an enlarged view of the second spring shown in fig. 7 and removed at a, according to the present invention.

Fig. 9 is a front view of the buffering structure of the present invention.

Fig. 10 is a perspective view of the buffering structure of the present invention.

In FIGS. 1-10: 1. an internal lead; 101. a first filling layer; 102. a cable core; 103. a cable core sheath; 104. a cable core isolation layer; 105. an insulating layer; 106. a flame retardant layer; 107. a wear layer; 1071. a first protrusion; 2. a support framework; 3. a second filling layer; 4. wear resistant strips; 401. a second protrusion; 5. a buffer structure; 501. a buffer sheet; 502. a first spring; 6. an outer jacket; 7. an insulating shield layer; 801. an oxidation-resistant layer; 802. a waterproof layer; 9. a buffer layer; 901. a groove; 902. a second spring; 9011. a pit; 9012. a first trapezoidal block; 9013. a second trapezoidal block; 10. the outer skin is reinforced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 10 in the embodiments of the present invention.

Referring to fig. 1-10, the present invention discloses a technical solution:

a bending-resistant cable comprises an internal lead 1, a first filling layer 101, a cable core 102, a cable core sheath 103, a cable core isolation layer 104, an insulation layer 105, a flame-retardant layer 106, a wear-resistant layer 107, a first protrusion 1071, a support framework 2, a second filling layer 3, a wear-resistant strip 4, a second protrusion 401, a buffer structure 5, a buffer sheet 501, a first spring 502, an outer protective layer 6, an insulation shielding layer 7, an anti-oxidation layer 801, a waterproof layer 802, a buffer layer 9, a groove 901, a second spring 902, a pit 9011, a first trapezoidal block 9012, a second trapezoidal block 9013 and a reinforcing outer skin 10, wherein the second filling layer 3 is coated outside the support framework 2, the outer ring of the second filling layer 3 is fixedly connected with the wear-resistant strip 4, arc-shaped grooves are formed in two sides of the wear-resistant strip 4, the second protrusion 401 is fixedly connected in the arc-shaped grooves, the internal lead 1 is placed between the wear-resistant strips 4, the outer ring of the first filling layer 101 is provided with a cable core 102, the outer part of the cable core 102 is coated with a cable core sheath 103, the outer side of the cable core sheath 103 is coated with a cable core isolation layer 104, the cable core isolation layer 104 is uniformly fixed on the inner side of the insulation layer 105 in a surrounding manner, the cable core isolation layer 104 is uniformly fixed on the outer side of the first filling layer 101 in a surrounding manner, the outer side of the insulation layer 105 is coated with a flame retardant layer 106, the outer side of the flame retardant layer 106 is coated with a wear-resistant layer 107, the outer surface of the wear-resistant layer 107 is fixedly connected with a first protrusion 1071, the outer part of the internal lead 1 is provided with a buffer structure 5, the outer layer of the buffer structure 5 is a buffer sheet 501, a first spring 502 is fixedly connected in a middle cavity of the buffer sheet 501, the buffer structure 5 is fixed on the outer protection layer, the outer fixed connection of waterproof layer 802 is round buffer layer 9, and the buffer layer 9 surface is provided with recess 901, and both sides are provided with pit 9011 in the recess 901, fixedly connected with second spring 902 in the pit 9011, and recess 901 bottom fixedly connected with first trapezoidal piece 9012, second trapezoidal piece 9013, have one deck enhancement crust 10 at the winding of buffer layer 9 outer lane.

In the invention, the supporting framework 2 is made of brass, and the brass has good toughness and wear resistance, so that the toughness of the invention can be increased.

In the invention, the number of the cable cores 102 is 7 or more than 7.

In the present invention, the first filling layer 101 and the second filling layer 3 are both made of elastic material, and both can be made of the same material, preferably TPE rubber.

In the invention, the outer surface of the cable core isolation layer 104 is uneven, the concave part and the convex part are arcs with the same radius, the arc lengths are the same, the adjacent cable core isolation layers 104 can be mutually limited, and the friction times are reduced.

According to the invention, arc grooves are arranged on two sides of the wear-resistant strip 4, the curvature radius of the arc grooves is the same as that of the wear-resistant layer 107, the wear-resistant layer 107 can be limited, the second protrusion 401 is fixedly connected in the arc grooves, the first protrusion 1071 is fixedly connected to the outer surface of the wear-resistant layer 107, the first protrusion 1071 and the second protrusion 401 are of the same structure and are collectively referred to as protrusions, the shape of the protrusions is a regular tetrahedron with rounded corners, in the using process, the protrusions are arranged to increase the resistance between the wear-resistant strip 4 and the wear-resistant layer 107 and reduce the friction times between the wear-resistant strip 4 and the wear-resistant layer 107, and the wear-resistant strip 4, the wear-resistant layer 107.

According to the invention, the number of the buffer structures 5 is 12, the buffer sheet 501 is arranged on the outer layer of the buffer structure 5, the shape of the buffer sheet 501 is the shape formed by symmetrically combining two S shapes, the upper end and the lower end of the first spring 502 are fixedly connected with the buffer sheet 501, the buffer structure 5 faces the internal lead 1 and the wear-resistant strip 4, and the buffer structure 5 can be quickly restored after being bent and can fix the internal lead 1.

In the invention, iron-carbon mixed particles are arranged in the anti-oxidation layer 801, so that oxygen entering the cable can be adsorbed, and the internal aging of the cable can be prevented.

In the invention, the waterproof layer 802 is filled with water-absorbing resin particles for absorbing water vapor or water entering the cable.

In the invention, the grooves 901 are formed in the outer surface of the buffer layer 9, so that the invention is convenient to slightly bend, the number of the grooves 901 on the same section is two, the two grooves are in one group, two adjacent groups of the grooves 901 are arranged in a crossed manner, the crossed angle is 90 degrees, and the grooves can be bent in various directions; pits 9011 are formed in two sides of the inside of each groove 901 and used for being fixedly connected with a second spring 902, two pits 9011 are formed in each groove 901, a first trapezoid block 9012 and a second trapezoid block 9013 which are fixedly connected to the bottoms of the grooves 901 are matched for use, the shapes and the specifications are the same, the bottom angle of each groove is 38-43 degrees, the angle of each groove is preferably 42 degrees, a gap is reserved between the first trapezoid block 9012 and the second trapezoid block 9013, the first trapezoid block 9012 and the second trapezoid block 9013 can limit the bending degree of the spring, excessive bending is prevented, half of the second spring 902 is compressed and stretched after being bent, and the second spring 902 is very easy to recover under the elastic force of the second spring 902.

In the invention, the outer protective layer 6 is made of halogen-free low-smoke flame-retardant polyolefin.

In the present invention, the insulating layer 105 and the insulating shield layer 7 may be made of the same material, i.e., crosslinked polyethylene, which serves as an insulation against accidents caused by electricity.

In the invention, the material of the reinforcing outer skin 10 is high-tear-resistance silicon rubber which has good aging resistance, high and low temperature resistance and tear resistance, and the reinforcing outer skin can be protected at the outermost layer, so that the service life is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a resistant cable of buckling, includes inside wire (1), first filling layer (101), cable core (102), cable core sheath (103), cable core isolation layer (104), insulating layer (105), fire-retardant layer (106), wearing layer (107), supporting framework (2), second filling layer (3), wear resistant strip (4), the second is protruding (401), buffer structure (5), outer jacket (6), insulation shield (7), anti-oxidation coating (801), waterproof layer (802), buffer layer (9), strengthen crust (10), its characterized in that: the outer side of the supporting framework (2) is coated with a second filling layer (3), the outer ring of the second filling layer (3) is fixedly connected with wear-resistant strips (4), internal leads (1) are placed between the wear-resistant strips (4), the center of each internal lead (1) is provided with a first filling layer (101), the outer ring of each first filling layer (101) is provided with a cable core (102), the outer part of each cable core (102) is coated with a cable core sheath (103), the outer side of each cable core sheath (103) is coated with a cable core isolating layer (104), the cable core isolating layers (104) are uniformly fixed on the inner side of the insulating layer (105) in a surrounding manner, the cable core isolating layers (104) are uniformly fixed on the outer side of the first filling layer (101) in a surrounding manner, the outer side of the insulating layer (105) is coated with a flame-retardant layer (106), the outer side of the flame-retardant, inside wire (1) and wear-resisting strip (4) are even in turn around outside sheath (6) inboard, and the cladding has insulation shielding layer (7) outside outer sheath (6), and insulation shielding layer (7) skin wraps up anti-oxidation coating (801), waterproof layer (802) in proper order, and waterproof layer (802) outer fixed connection round buffer layer (9), has one deck reinforcing crust (10) in buffer layer (9) outer lane winding.

2. A bend-resistant cable as recited in claim 1, wherein: the supporting framework (2) is made of brass.

3. A bend-resistant cable as recited in claim 1, wherein: the number of the cable cores (102) is seven.

4. A bend-resistant cable as recited in claim 1, wherein: the first filling layer (101) and the second filling layer (3) are made of PE rubber.

5. A bend-resistant cable as recited in claim 1, wherein: the outer surface of the cable core isolation layer (104) is uneven, the concave part and the convex part are arcs with the same radius, and the arc lengths are the same.

6. A bend-resistant cable as recited in claim 1, wherein: wear-resisting strip (4) both sides are provided with the arc wall, and arc wall curvature radius is the same with wearing layer (107) radius, and fixedly connected with second is protruding (401) in the arc wall, and wearing layer (107) surface fixed connection has first protruding (1071), and first protruding (1071) is the same with second protruding (401) structure, and its shape is the regular tetrahedron of fillet for the apex angle, and wear-resisting strip (4), wearing layer (107) and first protruding (1071) are the PVC material with protruding (401) of second.

7. A bend-resistant cable as recited in claim 1, wherein: buffer structure (5) quantity is 12, and buffer structure (5) skin is buffer sheet (501), and buffer sheet (501) shape is the shape behind two "S" symmetrical group, the first spring (502) of fixedly connected with in the cavity in the middle of buffer sheet (501), both ends all with buffer sheet (501) fixed connection about first spring (502), and buffer structure (5) are just facing inside wire (1) and wear-resisting strip (4).

8. A bend-resistant cable as recited in claim 1, wherein: iron-carbon mixed particles are arranged in the anti-oxidation layer (801); the waterproof layer (802) is internally provided with water-absorbent resin particles.

9. A bend-resistant cable as recited in claim 1, wherein: the outer surface of the buffer layer (9) is provided with two grooves (901), the number of the grooves (901) on the same section is two, the two grooves are in one group, two adjacent groups of grooves (901) are arranged in a crossed mode, the crossed angle is 90 degrees, and the grooves can be bent in all directions; both sides are provided with pit (9011) in recess (901), are provided with two pit (9011) in every recess (901), fixedly connected with second spring (902) in pit (9011), recess (901) bottom fixedly connected with first trapezoidal piece (9012), second trapezoidal piece (9013), first trapezoidal piece (9012), the supporting use of second trapezoidal piece (9013), the shape specification is the same, its bottom angle is 42, leaves the space between first trapezoidal piece (9012), the second trapezoidal piece (9013).

10. A bend-resistant cable as recited in claim 1, wherein: the outer protective layer (6) is made of halogen-free low-smoke flame-retardant polyolefin; the insulating layer (105) and the insulating shielding layer (7) can be made of the same material and are made of cross-linked polyethylene; the material of the reinforcing outer skin (10) is high tear-resistant silicon rubber.