CN217239071U

CN217239071U - Low-voltage cable

Info

Publication number: CN217239071U
Application number: CN202123433438.3U
Authority: CN
Inventors: 刘志红; 刘晓鹏
Original assignee: Shijiazhuang Opel Cable Co ltd
Current assignee: Shijiazhuang Dingniu Cable Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-19
Anticipated expiration: 2031-12-30

Abstract

The utility model belongs to the technical field of the cable and specifically relates to a low tension cable is related to, establish the insulating cover and the oversheath of establishing in the insulating cover outside in the sinle silk outside including sinle silk, the cover that many silk threads are constituteed, the insulating cover sets up to the crosslinked polyethylene layer, the oversheath sets up to polyvinyl chloride layer or rubber layer. In the application, the insulating sleeve adopts cross-linked polyethylene as a material, so that the fire-resistant and flame-retardant performance is stronger, the physical performance is enhanced, and the safety of the cable is improved.

Description

Low-voltage cable

Technical Field

The application relates to the field of cables, in particular to a low-voltage cable.

Background

The low-voltage cable is composed of a wire core, an insulating sleeve and a protective layer. The wire core is used for conducting current and is generally formed by stranding a plurality of copper wires or a plurality of aluminum wires. The low-voltage cable comprises a single core, a double core, a three core, a four core and the like. The double-core cable is used for a single-phase line, the three-core and four-core cables are respectively used for a three-phase three-wire system line and a three-phase four-wire system line, and the single-core cable can be applied to the single-phase system line or the three-phase system line as required.

The safety of the household electric wire is particularly important as a common low-voltage cable which is commonly used in a household circuit. Domestic cable among the correlation technique when the wiring, need cut off the outer protective sheath of end, is connected sinle silk and other circuits or electrical component, but when voltage overload took place, connector lug department produced high temperature, and the outer insulating cover of sinle silk is often fire-retardant ability relatively poor, leads to the cable high temperature and takes place the burning, and then arouses the conflagration.

SUMMERY OF THE UTILITY MODEL

In order to strengthen the fire-retardant heat-proof quality of domestic cable, improve the security, the application provides a low tension cable.

The application provides a low tension cable adopts following technical scheme:

the utility model provides a low tension cable, includes that sinle silk, cover that many silk threads are constituteed establish the insulating cover in the sinle silk outside and establish the oversheath in the insulating cover outside, the insulating cover sets up to the crosslinked polyethylene layer, the oversheath sets up to polyvinyl chloride layer or rubber layer.

Through adopting above-mentioned technical scheme, the sinle silk of cable comprises many silk yarns, and such cable is under the condition that does not influence electrical property, and hardness is littleer, more convenient production, and the cable is when the wiring, and the oversheath need be peeled off to joint department, and the insulating cover is direct to be exposed, and the insulating cover adopts crosslinked polyethylene as the material, and fire-resistant flame retardant property is stronger, and physical properties also obtains the reinforcing, and the security of cable obtains promoting.

Optionally, the wire cores are arranged in parallel with 2-4 wire cores, and the insulating sleeves of adjacent wire cores are abutted.

Through adopting above-mentioned technical scheme, the insulating layer between the sinle silk independently exists, and is more convenient during the wiring.

Optionally, rigid support sleeves are axially sleeved outside the insulation sleeves of the plurality of wire cores at intervals, through holes with the same number as the insulation sleeves are formed in the rigid support sleeves, and the insulation sleeves are arranged in the through holes in a penetrating mode.

Through adopting above-mentioned technical scheme, support a plurality of sinle silks by the rigidity cover that supports, keep the section shape stability of whole cable at fixed state to improve the structural strength and the anti extrusion performance of cable.

Optionally, the wire cores are arranged in parallel with 2-4 wire cores, and the insulation sleeves of adjacent wire cores are of an integral structure.

Through adopting above-mentioned technical scheme, the insulating cover of a plurality of sinle silks adopts integrative structure, makes the wholeness of whole cable better, and structural strength is higher.

Optionally, a reinforcing steel wire is arranged at the center of the joint of the insulating sleeves, and the reinforcing steel wire is fixedly arranged at the joint of the insulating sleeves along the axial direction.

By adopting the technical scheme, the arrangement of the reinforcing steel wire further enhances the structural strength of the cable; when carrying out cable junction, need cut apart the insulating cover of a plurality of sinle silks, strengthen steel wire and its shared space, reduced insulating cover's cutting apart thickness and degree of difficulty.

Optionally, the thickness of the joint between two adjacent insulating sleeves is gradually reduced from two sides to the middle, and notches are formed at the positions with the minimum thickness at intervals along the axial direction.

By adopting the technical scheme, the insulation sleeves of the wire cores are separated more easily, the cutting length is reduced, and the reinforcement steel wire is convenient to cut the insulation sleeves from the inner side to the outer side.

Optionally, the number of the wire cores is 2-4, the wire cores are wound together, and flexible fastening sleeves are axially sleeved outside the insulation sleeves of the plurality of wire cores at intervals.

Through adopting above-mentioned technical scheme, flexible adapter sleeve can bind a plurality of sinle silks together, conveniently produces the cover outside the insulating layer and establishes the oversheath.

Optionally, a filling layer is disposed between the insulating sleeve and the outer sheath.

Through adopting above-mentioned technical scheme, the space between insulating cover and the oversheath is filled to the filling layer, can protect the sinle silk structure better.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sinle silk of this application cable comprises many silk threads, and such cable is under the condition that does not influence electrical property, and hardness is littleer, more convenient production, and the cable is when the wiring, and joint department need peel off the oversheath, and insulating cover directly exposes, and insulating cover adopts crosslinked polyethylene as the material, and fire-resistant flame retardant property is stronger, and physical properties also obtains the reinforcing, and the security of cable obtains promoting.

2. In the application, the reinforcing steel wire is added in the insulating sleeve, so that the structural strength of the cable is further enhanced; when carrying out cable junction, need cut apart the insulating cover of a plurality of sinle silks, strengthen steel wire and its shared space, reduced insulating cover's cutting apart thickness and degree of difficulty.

Drawings

Fig. 1 is a schematic cross-sectional structure of a cable in embodiment 1 of the present application.

Fig. 2 is a schematic view showing the distribution of the rigid support sleeve in example 1 of the present application.

Fig. 3 is a schematic cross-sectional structure of a cable in embodiment 2 of the present application.

FIG. 4 is a schematic view of the distribution of the gaps in the embodiment 2 of the present application.

Fig. 5 is a schematic cross-sectional structure of a cable in embodiment 3 of the present application.

Figure 6 is a schematic view of the distribution of the flexible fastening sleeve in example 3 of the present application.

Description of reference numerals: 1. a wire core; 2. an insulating sleeve; 21. opening the gap; 3. an outer sheath; 4. a rigid support sleeve; 5. reinforcing steel wires; 6. a flexible fastening sleeve; 7. and (5) filling the layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a low-voltage cable.

Example 1

Referring to fig. 1 and 2, the low voltage cable includes a wire core 1, an insulating sheath 2, and an outer sheath 3. Sinle silk 1 comprises many copper lines that the diameter is less than 1mm, makes 1 texture of whole sinle silk become soft, buckles more easily and coils. Owing to be domestic cable, the diameter size of low voltage cable is less in this application, and insulating cover 2 directly overlaps in the outside of sinle silk 1, and insulating cover 2's material is crosslinked polyethylene, and heat-resisting fire resistance is better, can alleviate the problem that cable joint department voltage overload ignites. The outer sheath 3 covers the insulating sleeves 2 of all the wire cores 1, the outer sheath 3 is made of polyvinyl chloride or rubber, and the cable is softer in texture due to the adoption of the polyvinyl chloride in the embodiment.

The number of the wire cores 1 is set in the range of 2-4, and the wire cores 1 are arranged in parallel, in this embodiment, three wire cores 1 are taken as an example for explanation. The three wire cores 1 are distributed around the same axis when being distributed, rigid support sleeves 4 are axially sleeved outside the insulation sleeves 2 of the three wire cores 1, the rigid support sleeves 4 are distributed on the insulation sleeves 2 at equal intervals, and the length of each rigid support sleeve 4 is smaller than the distance between every two adjacent rigid support sleeves 4; the rigid support sleeve 4 is provided with through holes with the same number as the insulation sleeves 2 along the axial direction, each wire core 1 and each insulation sleeve 2 are arranged in the corresponding through hole in a penetrating mode, and the insulation sleeves 2 are mutually abutted together at positions avoiding the rigid support sleeve 4. In the embodiment, the rigid supporting sleeve 4 supports the plurality of wire cores 1, so that the internal structure of the cable is prevented from being too loose.

Example 2

Referring to fig. 3 and 4, the number of the wire cores 1 is also set in the range of 2-4, and the wire cores 1 are arranged in parallel, and three wire cores 1 are still taken as an example in the embodiment for explanation. Three sinle silk 1 distribute around same axis equally when distributing, and three sinle silk 1's insulating cover 3 sets up to structure as an organic whole, and the cavity has been seted up along the axial of cable to the junction central point of three insulating cover 2, wears to be equipped with the thick enhancement steel wire 5 of 1mm in the cavity, strengthens steel wire 5 like this and has strengthened the structural strength of cable.

The thickness of the connecting part of two adjacent insulating sleeves 2 is gradually reduced from two sides to the middle, the thickness of the middle part is minimum, notches 21 are formed in the connecting part of the two insulating sleeves 2 at the position with the minimum thickness along the axial direction at intervals, the notches 21 directly penetrate into the cavity, when the wire cores 1 are separated, cutting can be carried out along the notches 21, the cutting length is smaller, and the cutting is more convenient.

Example 3

Referring to fig. 5 and 6, the number of the wire cores 1 is set to 2 to 4 and wound with each other, three being exemplified in the present embodiment. After three sinle silk 1 accomplished to convolute, the outside of three insulating cover 2 was equipped with flexible adapter sleeve 6 along the axial cover, and evenly spaced distribution such as flexible adapter sleeve 6 is on insulating cover 2, and the length of flexible adapter sleeve 6 is less than the interval between the adjacent flexible adapter sleeve 6, and flexible adapter sleeve 6 can be inseparabler with the connection of a plurality of sinle silks 1 like this. A filling layer 7 is arranged in a pore between the insulating sleeve 2 and the outer sheath 3, and the filling layer 7 in the embodiment adopts glass fiber.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A low voltage cable, characterized by: including sinle silk (1) that many silk yarns are constituteed, the cover establish insulating sleeve (2) in sinle silk (1) outside and establish oversheath (3) in insulating sleeve (2) outside, insulating sleeve (2) set up to the crosslinked polyethylene layer, oversheath (3) set up to polyvinyl chloride layer or rubber layer.

2. A low voltage cable according to claim 1, wherein: the cable cores (1) are parallelly provided with 2-4 cable cores, and the insulating sleeves (2) of the adjacent cable cores (1) are abutted.

3. A low-voltage cable according to claim 2, characterized in that: the insulation sleeve (2) of the plurality of wire cores (1) is sleeved with rigid support sleeves (4) at intervals along the axial direction, through holes with the same number as the insulation sleeves (2) are formed in the rigid support sleeves (4), and the insulation sleeves (2) are arranged in the through holes in a penetrating mode.

4. A low-voltage cable according to claim 1, characterized in that: the cable core (1) is provided with 2-4 cable cores in parallel, and the insulation sleeves (2) of the adjacent cable cores (1) are of an integral structure.

5. A low-voltage cable according to claim 4, characterized in that: the central position of the joint of the insulating sleeves (2) is provided with a reinforcing steel wire (5), and the reinforcing steel wire (5) is fixedly arranged at the joint of the insulating sleeves (2) along the axial direction.

6. A low-voltage cable according to claim 5, characterized in that: the thickness of the joint of two adjacent insulating sleeves (2) is gradually reduced from two sides to the middle, and notches (21) are formed at the position with the minimum thickness at intervals along the axial direction.

7. A low-voltage cable according to claim 1, characterized in that: the cable core (1) is provided with 2-4 cables which are wound together, and flexible fastening sleeves (6) are sleeved outside the insulation sleeves (2) of the cable cores (1) at intervals along the axial direction.

8. A low-voltage cable according to claim 7, characterized in that: and a filling layer (7) is arranged between the insulating sleeve (2) and the outer sheath (3).