Anti-dragging wear-resistant medium-voltage mining rubber flexible cable

Abstract

The utility model discloses an anti-dragging wear-resistant medium-voltage mining rubber flexible cable which sequentially comprises an outer sheath, an inner sheath and a cable core from outside to inside, the cable core comprises a plurality of main lines and a plurality of ground wires, and each main line comprises a main line conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer which are arranged inside. The center of the cable core is provided with a cable center signal line, a Kevlar bulletproof rope winding layer is arranged between the inner sheath and the outer sheath, and the ground wire comprises a ground wire conductor and a conductor shielding layer. The cable has excellent dragging resistance, electrical insulating property, flexibility, acid and alkali resistance, water resistance, corrosion resistance and guiding and warning capability of an underground cable, the phenomenon that the service life of the cable is shortened due to external force damage is reduced, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, relates to rubber flexible cables, and particularly relates to a high-strength, anti-dragging, wear-resistant, and mine safety warning anti-dragging and wear-resistant medium-voltage mine-used rubber flexible cable. Background Art

[0002] With the development of the times, the production safety of coal mines has received increasing attention. In the past coal mine accidents in China, gas, water, and fire have all been the main causes of coal mine accidents. Among them, accidents caused by gas explosions are particularly prominent, accounting for 47% of the total number of coal mine accidents. Therefore, cables used in coal mines require very high technical requirements.

[0003] Although ordinary mine-used rubber cables have the advantages of wear resistance, water resistance, and good bending performance, there are still phenomena of bumping and scratching in the mechanical tensile resistance of ordinary mine-used rubber cables during industrial and mining use, and their mechanical properties are not ideal. Moreover, due to the limited brightness of mine lights, when cables are used in particularly harsh industrial and mining environments, they are easily mechanically damaged, resulting in sheath rupture and core breakage, causing the scrapping of the used cables or shortening their service life. Content of the Utility Model

[0004] In order to solve the above problems, the utility model provides an anti-dragging and wear-resistant medium-voltage mine-used rubber flexible cable. In addition to having excellent anti-dragging performance, electrical insulation performance, flexibility, acid and alkali resistance, water resistance, corrosion resistance, and the ability to guide and warn cables in underground mines, the utility model reduces the phenomenon of cable life reduction caused by external force damage and improves the service life cycle of the cable.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An anti-dragging and wear-resistant medium-voltage mine-used rubber flexible cable, the medium-voltage mine-used rubber flexible cable sequentially includes an outer sheath, an inner sheath, and a cable core from outside to inside. The cable core includes a plurality of main wires and a plurality of ground wires. The main wire includes a main wire conductor, a conductor shielding layer, an insulating layer, and an insulating shielding layer arranged inside. A cable center signal wire is arranged at the center of the cable core. A Kevlar bulletproof rope winding layer is arranged between the inner sheath and the outer sheath. The ground wire includes a ground wire conductor and a conductor shielding layer.

[0007] As a preferred scheme of the utility model, the ground wire is tangent to the adjacent main wire.

[0008] As a preferred scheme of the utility model, the main wire conductor and the ground wire conductor are 15-fold right-handed stranded by a plurality of tinned copper wires, and then multiple strands are combined in a 1 + 6 + 12 + 18 layer-stranded full-right-handed 14-fold pitch composite stranding structure.

[0009] As a preferred embodiment of the present utility model, the number of the main lines is three.

[0010] As a preferred embodiment of the present utility model, the number of the ground lines is three.

[0011] As a preferred embodiment of the present utility model, a saddle-shaped support frame is arranged around the center signal line of the cable.

[0012] As a preferred embodiment of the present utility model, the edges of the saddle-shaped support frame are respectively abutted against the main line and the ground line.

[0013] As a preferred embodiment of the present utility model, a plurality of first depressions and a plurality of second depressions are arranged on the edge of the saddle-shaped support frame. The first depressions are abutted against partial outer edges of the main line, and the second depressions are abutted against partial outer edges of the ground line.

[0014] As a preferred embodiment of the present utility model, a longitudinal modified brightening polyurethane reflective strip is further arranged on the surface of the outer sheath.

[0015] As a preferred embodiment of the present utility model, the width of the modified brightening polyurethane reflective strip is 2 cm and the length is 5 cm.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] 1) The structure of the present utility model is simple. The center signal line of the cable is filled with a saddle-shaped support frame composed of a Kevlar bulletproof rope and a tinned conductor, which improves the softness and tensile performance of the cable.

[0018] 2) The cable of the present utility model has good electrical performance, softness, water resistance and high mechanical performance, ensuring that the cable has excellent electrical performance, softness, water resistance and corrosion resistance.

[0019] 3) The present utility model longitudinally arranges a modified brightening polyurethane reflective strip on the surface of the outer sheath, so that the cable has a marking and warning function, improves the guiding function of the cable under the dim light conditions in the mine, and at the same time avoids mechanical damage during the construction in the mine, so that it has a long service life cycle. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1It is a schematic diagram of the present utility model.

[0022] Figure 2 It is a schematic diagram of the saddle-shaped support frame of the present utility model.

[0023] In the figure, 1. Main line conductor; 2. Conductor shielding layer; 3. Insulation layer; 4. Insulation shielding layer; 5. Inner sheath; 6. Kevlar bulletproof rope winding layer; 7. Cable center signal line; 8. Modified brightening polyurethane reflective strip; 9. Outer sheath; 10. Ground wire conductor; 11. Saddle-shaped support frame; 12. First depression; 13. Second depression. Specific embodiments

[0024] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the accompanying drawings and embodiments.

[0025] The following further details the present application in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the relevant utility model and not for limiting the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings. The terms "first", "second", etc. used in the present utility model are set for the convenience of describing the technical solution of the present utility model and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict, and all are within the scope of protection required by the present utility model.

[0026] Embodiment 1

[0027] See Figure 1 Figure 1 , this embodiment provides a drag-resistant and wear-resistant medium-voltage mining rubber flexible cable. The medium-voltage mining rubber flexible cable sequentially includes an outer sheath 9, an inner sheath 5 and a cable core from outside to inside. The cable core includes a plurality of main lines and a plurality of ground lines. The main line includes a main line conductor 1, a conductor shielding layer 2, an insulating layer 3 and an insulating shielding layer 4 arranged inside. A cable center signal line 7 is provided at the center of the cable core. A Kevlar bulletproof rope winding layer 6 is provided between the inner sheath 5 and the outer sheath 9. The ground line includes a ground line conductor 10 and a conductor shielding layer 2.

[0028] In the present utility model, the number of the ground lines and the main lines is both 3, and the ground lines are tangent to the adjacent main lines.

[0029] The material of the insulating layer 3 of the cable adopts a ternary hard ethylene propylene rubber insulating material, which has excellent electrical insulation performance, flexibility, water resistance, ozone resistance and relatively high mechanical properties, ensuring that the cable has excellent electrical properties, flexibility, water resistance, corrosion resistance, etc.

[0030] The Kevlar bulletproof ropes are intertwined and wound between the inner sheath 5 and the outer sheath 9 of the cable to form a Kevlar bulletproof rope winding layer 6, improving the longitudinal tensile performance of the cable against dragging. The sheath adopts a modified polyurethane elastomer sheath material and is extruded by an extruder in a full extrusion manner to ensure full fusion between the inner and outer sheaths, improving the cable's anti-dragging ability. At the same time, the cable has excellent properties such as resistance to high and low temperatures, acids and alkalis, water, oil, and light weight.

[0031] The main line conductor 1 and the ground line conductor 10 adopt super category 5 tinned soft copper wires. After 15 times of right-handed bunching of a plurality of tinned copper wires, and then multi-strand combination is re-twisted according to a lay-up of 1 + 6 + 12 + 18 layers and a right-handed lay-up pitch of 14 times.

[0032] A saddle-shaped support frame 11 is provided outside the cable center signal line 7. Bulletproof silk is used as the central reinforcement member, and metal-coated copper wires are helically wound around the periphery as the control line conductor. Ethylene propylene rubber material is extruded and coated as the conductor insulating layer. A spiral-wound polyester film tape is used outside the insulating layer, and a semi-conductive saddle-shaped support frame is extruded outside the polyester film tape.

[0033] See Figure 2 Figure 2 , the shape of the saddle-shaped support frame 7 includes three larger first depressions 12 and three smaller second depressions 13. The larger first depressions 12 just abut against the partial outer edges of the main lines, and the smaller second depressions 13 just abut against the partial outer edges of the ground lines, so that the main lines and the ground lines can be fixed between the inner sheath 5 and the saddle-shaped support frame 7.

[0034] The outer sheath 9 is also provided with longitudinal modified brightening polyurethane reflective strips 8. The red and yellow modified brightening polyurethane reflective strips 8 with a width of 2 cm and a length of 5 cm are extruded longitudinally and continuously added by means of injection strip, so that the cable has a marking and warning function, improves the guiding function of the cable under the dim light conditions in the mine, and at the same time avoids being damaged by mechanical damage during the construction in the mine, making it have a long service life cycle.

[0035] In addition to having excellent anti-dragging property, electrical insulation property, flexibility, acid and alkali resistance, water resistance, corrosion resistance, and the guiding and warning ability of the cable in the mine, the cable of the present utility model reduces the phenomenon that the cable life is reduced due to external force damage and improves the service life cycle of the cable.

[0036] The above has schematically described the present utility model and its implementation manners. The description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A drag-resistant and wear-resistant medium-voltage mining rubber flexible cable, characterized in that: The medium-voltage mining rubber soft cable includes an outer sheath, an inner sheath and a cable core from the outside to the inside. The cable core includes multiple main wires and multiple ground wires. The main wire includes a main wire conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer arranged inside. A cable center signal wire is provided at the center of the cable core. A Kevlar bulletproof rope winding layer is provided between the inner sheath and the outer sheath. The ground wire includes a ground wire conductor and a conductor shielding layer.

2. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 1 is characterized in that: The ground line is arranged tangentially to the adjacent main line.

3. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 1 is characterized in that: The main conductor and the ground conductor are multiple tinned copper wires bundled in 15 times the right direction, and then multiple strands are combined into a 1+6+12+18 layer twisted structure with a full right direction 14 times the twist pitch.

4. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 1 is characterized in that: The number of the main lines is 3.

5. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 1 is characterized in that: The number of the ground wires is 3.

6. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 1 is characterized in that: A saddle-shaped support frame is arranged on the periphery of the central signal line of the cable.

7. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 6 is characterized in that: The edges of the saddle-shaped support frame abut against the main line and the ground line respectively.

8. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 7, characterized in that: The edge of the saddle-shaped support frame is provided with a plurality of first recesses and a plurality of second recesses, wherein the first recesses abut against a portion of the outer edge of the main line, and the second recesses abut against a portion of the outer edge of the ground line.

9. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to any one of claims 1 to 8, characterized in that: The outer sheath surface is also provided with longitudinal modified brightening polyurethane reflective bright strips.

10. The drag-resistant and wear-resistant medium-voltage mining rubber flexible cable according to claim 9, characterized in that: The modified brightening polyurethane reflective bright strip has a width of 2 cm and a length of 5 cm.

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