A bend-resistant high voltage cable

Abstract

The application discloses a bending-resistant high-voltage cable and relates to the cable field.The bending-resistant high-voltage cable comprises a cable sheath and a cable core, the cable core is provided with a plurality of cable cores, the inside of the cable sheath is provided with iron wires and fixing pieces, the iron wires are provided with a plurality of iron wires, and the fixing pieces are used for fixing the iron wires simultaneously and forming a net frame structure.The bending-resistant high-voltage cable in the application realizes the purposes of anti-interference shielding and bending resistance based on the design of the net frame structure.The design of the net frame structure in the application can also be used for positioning the iron wires and the cable core, so that the problems of the iron wires or the cable core being twisted are avoided.The net frame structure in the application is fixed by the fixing pieces, the fixing pieces are simple in structure, can be produced in batches, are reasonable in structure design, and based on the combination of the net frame structure and the fixing pieces, the net frame structure with a relatively fixed structure is formed, the cable core is convenient to install, the installation efficiency is high, and the cable core is horizontally distributed, so the problem of being twisted does not occur.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cables, in particular to a bending-resistant high-voltage cable. BACKGROUND

[0002] The bending resistance of a high-voltage cable depends on its design and materials, and some high-voltage cables are specially designed to have good bending resistance.

[0003] When a high-voltage cable is produced in a factory, it is usually bent through a pre-set curved mold to meet the standard requirements for the bending radius of the cable. The cable processed in this way can be bent within a certain radius range without affecting its performance and service life. Therefore, some small-amplitude bending under normal circumstances does not have a significant impact on the cable insulation.

[0004] However, in actual use, the bending resistance of a high-voltage cable is affected by various factors. Some monitoring data shows that a cable that is often fixed in one position and in a bent state ages much faster than the unbent part of the cable. Long-term bending can cause the cable shell and insulation to age and deteriorate, leading to cable failure in later use.

[0005] In order to improve the bending resistance of a high-voltage cable, it is necessary to provide a bending-resistant high-voltage cable to solve the above problems. SUMMARY

[0006] The present application aims to provide a bending-resistant high-voltage cable that improves the bending resistance of a high-voltage cable.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a bending-resistant high-voltage cable, comprising a cable sheath and a cable core, the cable core being provided with a plurality of, the inside of the cable sheath being provided with iron wires and fixing members, the iron wires being provided with a plurality of, the fixing members being used to simultaneously fix the plurality of iron wires and form a mesh frame structure, the plurality of cable cores being fixed by the mesh frame structure and distributed in parallel along the length direction of the cable sheath.

[0008] Preferably, the fixing members are coated with glue, and the fixing members are adhesively fixed between the outer surface of the cable core and the inner surface of the cable sheath.

[0009] Preferably, the fixing members comprise a first clasp and a plurality of second clasps, the first clasp being distributed in the middle region between the plurality of cable cores, the plurality of second clasps being distributed at the outer circle of the cable core, the first clasp being provided with one, the plurality of second clasps being provided with a plurality of, and the first clasp and the plurality of second clasps being connected by connecting rods.

[0010] Preferably, the connecting rods are elastic.

[0011] Preferably, the cable sheath is provided with a first grounding assembly, and the first grounding assembly is fixed on the cable sheath by means of an insulating tape.

[0012] The first grounding assembly comprises a connecting sleeve, which is in a cylindrical structure, and a telescopic conductive block is slidably arranged on the upper end of the inside of the connecting sleeve, and a switching fixed conductive block is fixedly arranged on the lower end of the inside of the connecting sleeve, and a second conductive end and a first conductive end are fixedly arranged on the upper and lower surfaces of the switching fixed conductive block respectively, and a spring is also fixedly arranged on the upper surface of the switching fixed conductive block, and the spring is sleeved on the outside of the second conductive end, and the upper end of the spring is fixed on the bottom of the telescopic conductive block, and the lower surface of the telescopic conductive block is provided with a telescopic groove, and the upper end of the second conductive end is movably inserted into the telescopic groove, and the lower end of the connecting sleeve is provided with an internal thread.

[0013] Preferably, the upper end of the connecting sleeve is fixedly provided with an elastic skirt, and the elastic skirt has elasticity.

[0014] Preferably, the first grounding assembly is used in cooperation with a second grounding assembly.

[0015] The second grounding assembly comprises an insulating layer, and a conductive core is arranged in the inside of the insulating layer, and an electrically connected groove is arranged on the end surface of the conductive core, and an external thread is arranged at the outer circle of the conductive core.

[0016] Preferably, the external thread and the internal thread are matched with each other, and the electrically connected groove and the first conductive end are matched with each other.

[0017] Preferably, the inside of the cable sheath is filled with talcum powder.

[0018] Preferably, the fixing member is provided in multiple groups, and the multiple groups of fixing members are distributed equidistantly along the length direction of the iron wire.

[0019] The technical effects and advantages of the present application are as follows:

[0020] The bending-resistant high-voltage cable in the present application realizes the purposes of anti-interference shielding and bending resistance based on the design of the net frame structure.

[0021] The design based on the net frame structure in the present application can also serve the purpose of positioning the iron wire and the cable core, so as to avoid the problem of twisting of the iron wire or the cable core.

[0022] The net frame structure in the present application is fixed by the fixing member, and the fixing member has a simple structure, can be mass-produced, and has a reasonable structure design, and based on the combination of the net frame structure and the fixing member, a net frame structure with a relatively fixed structure is formed, which is convenient for installing the cable core, has high installation efficiency, and the cable core is horizontally distributed, and the problem of twisting does not occur.

[0023] The connecting rod has elasticity, and when the plurality of cable cores inside the cable sheath are twisted, the connecting rod can be reset in time by using the elastic ability of the connecting rod, and the mutual twisting of the plurality of cable cores is avoided.

[0024] The insulating tape and the first grounding assembly are further arranged on the cable sheath, the first grounding assembly can ground the iron wire inside the cable sheath, and static electricity is avoided.

[0025] The first grounding assembly can be applied to other cables in addition to the bending-resistant high-voltage cable, and has a wide application range and is convenient for batch production. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the bending-resistant high-voltage cable of the present application.

[0027] Figure 2 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0028] Figure 3 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0029] Figure 4 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0030] Figure 5 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0031] Figure 6 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0032] Figure 7 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0033] Figure 8 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0034] Figure 9 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application. Figure 8 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0035] Figure 10 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application. Figure 9 It is a structural schematic diagram of the end face of the bending-resistant high-voltage cable of the present application.

[0036] In the figure: 1, cable sheath; 2, cable core; 3, iron wire; 4, fixing part; 41, first clasp; 42, second clasp; 401, import and export; 5, connecting rod; 6, talcum powder; 7, insulating tape; 8, first grounding assembly; 801, connecting sleeve; 802, switching fixed conductive block; 803, first conductive end; 804, internal thread; 805, spring; 806, second conductive end; 807, telescopic groove; 808, telescopic conductive block; 809, elastic skirt; 9, second grounding assembly; 91, insulating layer; 92, conductive core; 901, power connection groove; 902, external thread. DETAILED DESCRIPTION

[0037] The present application provides a high-voltage cable with bending resistance as shown in Figures 1-10

[0038] Referring to the drawings shown in the accompanying drawings, the high-voltage cable with bending resistance comprises a cable sheath 1 and a cable core 2; Figure 1

[0039] Wherein, the cable sheath 1 is a conventional high-voltage cable outer insulation extrusion molding, which can be made of polyethylene, polyvinyl chloride or polypropylene, etc.

[0040] Wherein, the cable core 2 is a cable inner core with insulation sheath and formed by stranding machine, usually several according to actual demand, three in the present application.

[0041] Referring to the drawings shown in the accompanying drawings, three cable cores 2 and the inside of the cable sheath 1 form a blank area, which is usually filled with talcum powder, string, PP rope, polyester tape, tin foil tape, aramid silk, glass fiber silk and cotton thread, etc. in the prior art, which plays different roles; such as filling tin foil tape, which is made of aluminum foil as base material, and is combined with polyester tape after backing glue, which is used for interference shielding of multi-conductor control wire; but although the tin foil tape can play a certain role in anti-interference shielding, the tin foil tape is soft and easy to be damaged when the cable is bent, therefore, the present application provides a high-voltage cable with bending resistance, which realizes the purpose of considering anti-interference shielding and bending resistance by finding a substitute material: iron wire 3. Figure 2 Specifically, referring to the drawings shown in the accompanying drawings, the iron wire 3 is arranged in the blank area between the three cable cores 2 and the inside of the cable sheath 1, which is used for anti-interference shielding and bending resistance.

[0042] Figures 3-4 ​​​As shown in the cable sheath 1 inside the cable core 2 is provided with three, for example, the cable sheath 1 inside the total of ten wire 3, one of the wire 3 is distributed in the center of the three cable core 2 between the region, the other nine wire 3 in three groups of three cable core 2 respectively distributed in the outer circle groove formed by, the cable sheath 1 inside the remaining space filled with talc 6; when the bending resistance of the high voltage cable is bent, the ten wire 3 together with the support to make the bending resistance of the high voltage cable is not easy to be over-bent, the bending resistance is stronger, and the talc 6 also reduces the wear and tear between the cable sheath 1, the cable core 2 and the wire 3 when being bent, increases the service life of the bending resistance of the high voltage cable.

[0043] At the same time, the ten wire 3 forms a net frame structure surrounding the three cable core 2, which can realize the anti-interference shielding effect.

[0044] Reference Figure 5 As shown in the cable sheath 1 inside the cable core 2 is provided with three, for example, the cable sheath 1 inside the total of ten wire 3, one of the wire 3 is distributed in the center of the three cable core 2 between the region, the other nine wire 3 in three groups of three cable core 2 respectively distributed in the outer circle groove formed by, the cable sheath 1 inside the remaining space filled with talc 6; when the bending resistance of the high voltage cable is bent, the ten wire 3 together with the support to make the bending resistance of the high voltage cable is not easy to be over-bent, the bending resistance is stronger, and the talc 6 also reduces the wear and tear between the cable sheath 1, the cable core 2 and the wire 3 when being bent, increases the service life of the bending resistance of the high voltage cable. Figure 5 As shown in the cable sheath 1 inside the cable core 2 is provided with three, for example, the cable sheath 1 inside the total of ten wire 3, one of the wire 3 is distributed in the center of the three cable core 2 between the region, the other nine wire 3 in three groups of three cable core 2 respectively distributed in the outer circle groove formed by, the cable sheath 1 inside the remaining space filled with talc 6; when the bending resistance of the high voltage cable is bent, the ten wire 3 together with the support to make the bending resistance of the high voltage cable is not easy to be over-bent, the bending resistance is stronger, and the talc 6 also reduces the wear and tear between the cable sheath 1, the cable core 2 and the wire 3 when being bent, increases the service life of the bending resistance of the high voltage cable.

[0045] Need to be explained, the fixed part 4 is through the glue is adhered to the outer circle of the cable core 2, so as not to run off and separate.

[0046] Figure 6 Reference attached Figure 7 As shown in the cable sheath 1 inside the cable core 2 is provided with three, for example, the cable sheath 1 inside the total of ten wire 3, one of the wire 3 is distributed in the center of the three cable core 2 between the region, the other nine wire 3 in three groups of three cable core 2 respectively distributed in the outer circle groove formed by, the cable sheath 1 inside the remaining space filled with talc 6; when the bending resistance of the high voltage cable is bent, the ten wire 3 together with the support to make the bending resistance of the high voltage cable is not easy to be over-bent, the bending resistance is stronger, and the talc 6 also reduces the wear and tear between the cable sheath 1, the cable core 2 and the wire 3 when being bent, increases the service life of the bending resistance of the high voltage cable.

[0047] The first clasp ring 41 and the second clasp ring 42 are provided with an inlet and outlet 401, and the first clasp ring 41 and the second clasp ring 42 can be elastically deformed. The wire 3 can be clamped into the first clasp ring 41 or the second clasp ring 42 through the inlet and outlet 401, so as to realize the fixation of the wire 3.

[0048] The specific production steps of the bending-resistant high-voltage cable in the application include:

[0049] First step: glue, immerse the fixed part 4 in the glue or brush the glue on the outer surface of the fixed part 4; ​

[0050] Second step: build the net frame structure, first pass through the first ring 41 on the import and export 401 card in the first ring 41, then along the length of the wire 3 equidistantly arranged fixing member 4, and the wire 3 with a plurality of first ring 41 card fixed at the same time, and then in turn the remaining nine wire 3 card in nine second ring 42, form the net frame structure;

[0051] Because the fixing member 4 is coated with glue, after forming the net frame structure, the wire 3 can be fixed on the fixing member 4;

[0052] Third step: install the cable core 2, three cable cores 2 are respectively carded into three S areas, and the three cable cores 2 are fixed on the fixing member 4 by glue;

[0053] Fourth step: using the extruder, fill the talc 6 in the outer circle of the cable core 2, and coat the cable sheath 1 on the outer circle of the cable core 2, complete the preparation of the bending resistant high voltage cable.

[0054] The connecting rod 5 in the application has elasticity, which can reset in time when the multiple cable cores 2 inside the cable sheath 1 appear to be twisted, avoiding the mutual twisting of the multiple cable cores 2; and based on the setting of the wire 3 and the fixing member 4, the cable cores 2 inside the cable sheath 1 can be kept horizontally distributed along the length direction of the cable sheath 1, further avoiding the problems of twisting and abrasion.

[0055] Reference Figure 8 As shown in the reference, considering that static electricity problem is easy to occur on the surface of the cable in actual use process, and static electricity is usually generated for the following reasons:

[0056] First: charge generated by friction, the cable is in use and transportation process, because of the contact friction with the outside world, the charge is activated and static electricity is generated. Once the friction disappears, the conductor surface charge cannot be neutralized, resulting in static electricity accumulation.

[0057] Second: temperature change, the cable is in transportation and storage process, the change of temperature will cause the expansion, shrinkage and displacement of the internal material of the cable, so as to produce static electricity phenomenon on the surface of the conductor.

[0058] Third: humidity change: when the weather changes, the temperature decreases or the humidity increases, water and water film are easy to appear on the surface of the wire, so as to produce static electricity.

[0059] Among them, the first and second reasons usually also cause static electricity problem inside the cable; the third reason generally causes static electricity problem outside the cable.

[0060] The prior art generally uses an anti-static material to reduce the generation and accumulation of electric charges, but the effect is not great, and once there is static electricity, it will cause problems such as damage to equipment and cables, fire hazards, electromagnetic interference, and performance degradation, etc. Therefore, the present application further provides an insulating tape 7 and a first grounding assembly 8 on the cable sheath 1, and the first grounding assembly 8 can ground the iron wire 3 inside the cable sheath 1 to avoid static electricity.

[0061] The insulating tape 7 is used to fix the first grounding assembly 8 on the cable sheath 1, and seals the connection between the first grounding assembly 8 and the cable sheath 1 to avoid problems such as water leakage and electric leakage.

[0062] Reference Figure 10 As shown in FIG. 8, the first grounding assembly 8 includes a connecting sleeve 801, which is a cylindrical structure, and a telescopic conductive block 808 is slidably arranged at the upper end of the inside of the connecting sleeve 801, and a switching fixed conductive block 802 is fixedly arranged at the lower end of the inside of the connecting sleeve 801, and a second conductive end 806 and a first conductive end 803 are fixedly arranged on the upper and lower surfaces of the switching fixed conductive block 802 respectively, and a spring 805 is fixedly arranged on the upper surface of the switching fixed conductive block 802, and the spring 805 is sleeved on the outside of the second conductive end 806, and the upper end of the spring 805 is fixed on the bottom of the telescopic conductive block 808, and the lower surface of the telescopic conductive block 808 is provided with a telescopic groove 807, and the upper end of the second conductive end 806 is movably inserted into the telescopic groove 807, and the lower end inner wall of the connecting sleeve 801 is provided with an internal thread 804, and an elastic skirt 809 is fixedly arranged at the outer circle of the upper end of the connecting sleeve 801, and the elastic skirt 809 has elasticity.

[0063] When installing the first grounding assembly 8, first make a hole in the side of the cable sheath 1, and then insert one end of the connecting sleeve 801 with the elastic skirt 809 into the hole, and then use the insulating tape 7 to fix the connecting sleeve 801 on the cable sheath 1 and seal the hole; the spring 805 can push the telescopic conductive block 808 to abut against the outer surface of the iron wire 3, and the static electricity generated inside the cable sheath 1 can be sequentially discharged along the telescopic conductive block 808, the second conductive end 806, the switching fixed conductive block 802 and the first conductive end 803, without static electricity affecting.

[0064] Further, based on the arrangement of the spring 805, the telescopic conductive block 808 can be tightly attached to the outer surface of the iron wire 3 in real time, and the problem of poor contact and inability to discharge static electricity caused by other factors can be avoided.

[0065] Further, based on the arrangement of the spring 805, the telescopic conductive block 808 can be tightly attached to the outer surface of the iron wire 3 in real time, and the problem of poor contact and inability to discharge static electricity caused by other factors can be avoided.

[0066] It should be noted that in actual use, the first grounding assembly 8 can be provided with multiple groups according to actual needs, and the first grounding assembly 8 is installed at a suitable position on the cable sheath 1; the first grounding assembly 8 in the application can not only be applied to the bending-resistant high-voltage cable, but also can be applied to other cables, and has a wide application range and is convenient for mass production.

[0067] Reference Figure 8 and Figure 9 As shown in Figs. 1-9, in the application, a second grounding assembly 9 is arranged at one end of the first grounding assembly 8 away from the cable sheath 1, the second grounding assembly 9 comprises an insulating layer 91, an electrically conductive core 92 is arranged in the insulating layer 91, an electrically conductive groove 901 is arranged on an end surface of the electrically conductive core 92, and an external thread 902 is arranged at an outer circle of the electrically conductive core 92; when the second grounding assembly 9 is connected with the first grounding assembly 8, the external thread 902 is connected with the internal thread 804 in a matched mode, the first electrically conductive end 803 is clamped into the electrically conductive groove 901, and one end of the second grounding assembly 9 away from the first grounding assembly 8 is grounded; through the arrangement of the first grounding assembly 8 and the second grounding assembly 9, static electricity generated in the cable sheath 1 can be grounded and discharged.

Claims

1. A bending-resistant high-voltage cable, comprising a cable sheath (1) and a cable core (2), wherein a plurality of the cable cores (2) are provided, and characterized in that: The cable sheath (1) is provided with iron wires (3) and fixing members (4), wherein a plurality of iron wires (3) are provided, and the fixing members (4) are used to fix the plurality of iron wires (3) at the same time to form a mesh frame structure, wherein a plurality of cable cores (2) are fixed by the mesh frame structure and the cable cores (2) are distributed in parallel along the length direction of the cable sheath (1); A first grounding component (8) is installed on the cable sheath (1), and the first grounding component (8) is fixed to the cable sheath (1) using an insulating tape (7); The first grounding component (8) includes a connecting sleeve (801), the connecting sleeve (801) is a cylindrical structure, the inner upper end of the connecting sleeve (801) is slidably provided with a telescopic conductive block (808), the inner lower end of the connecting sleeve (801) is fixedly provided with a transfer fixed conductive block (802), the upper and lower surfaces of the transfer fixed conductive block (802) are respectively fixedly provided with a second conductive end (806) and a first conductive end (803), the upper surface of the transfer fixed conductive block (802) is also fixedly provided with a spring (805), the spring (805) is sleeved on the outside of the second conductive end (806), the upper end of the spring (805) is fixed to the bottom of the telescopic conductive block (808), the lower surface of the telescopic conductive block (808) is provided with a telescopic groove (807), the upper end of the second conductive end (806) is movably extended into the telescopic groove (807), and the inner wall of the lower end of the connecting sleeve (801) is provided with an internal thread (804); An elastic skirt (809) is fixedly provided at the outer ring of the upper end of the connecting sleeve (801), and the elastic skirt (809) is elastic; When installing the first grounding component (8), a hole is first opened on the side of the cable sheath (1), and one end of the connecting sleeve (801) with the elastic skirt (809) is inserted into the hole. Then, the connecting sleeve (801) is fixed to the cable sheath (1) using the insulating tape (7) and the hole is sealed. The spring (805) can push the telescopic conductive block (808) to contact the outer surface of the iron wire (3). After static electricity is generated inside the cable sheath (1), it can be discharged in sequence along the telescopic conductive block (808), the second conductive end (806), the transfer fixed conductive block (802) and the first conductive end (803).

2. A bending-resistant high-voltage cable according to claim 1, characterized in that: The fixing member (4) is coated with glue, and the fixing member (4) is bonded and fixed to the outer surface of the cable core (2) and the inner surface of the cable sheath (1).

3. The bending-resistant high-voltage cable according to claim 1, characterized in that: The fixing member (4) comprises a first clamping ring (41) and a second clamping ring (42), wherein the first clamping ring (41) is distributed in a middle area between a plurality of cable cores (2), and the second clamping ring (42) is distributed at the outer ring of the cable core (2), one first clamping ring (41) is provided, and a plurality of second clamping rings (42) are provided, and the first clamping ring (41) and the second clamping ring (42) as well as adjacent second clamping rings (42) are connected via a connecting rod (5).

4. The bending-resistant high-voltage cable according to claim 3, characterized in that: The connecting rod (5) is elastic.

5. The bending-resistant high-voltage cable according to claim 1, characterized in that: The first grounding component (8) is used in conjunction with the second grounding component (9); The second grounding component (9) comprises an insulating layer (91), a conductive core (92) is provided inside the insulating layer (91), an electrical connection slot (901) is provided on the end surface of the conductive core (92), and an external thread (902) is provided at the outer ring of the conductive core (92).

6. The bending-resistant high-voltage cable according to claim 5, characterized in that: The external thread (902) and the internal thread (804) cooperate with each other, and the electrical connection slot (901) and the first conductive end (803) cooperate with each other.

7. The bending-resistant high-voltage cable according to claim 1, characterized in that: The interior of the cable sheath (1) is filled with talcum powder (6).

8. The bending-resistant high-voltage cable according to claim 1, characterized in that: The fixing members (4) are provided in multiple groups, and the multiple groups of fixing members (4) are distributed at equal distances along the length direction of the iron wire (3).

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