Flame-retardant cable for coal mining machine

Abstract

The utility model relates to the technical field of cables, and discloses a flame-retardant cable for a coal mining machine, which comprises a wire group and a protective layer, an inner lining layer is wrapped outside the wire group, a filling layer is arranged between the inner lining layer and the wire group, a metal shielding layer is wrapped outside the inner lining layer, a tensile component is arranged outside the metal shielding layer, the tensile component comprises a first insulating layer and a tensile layer, and the first insulating layer and the tensile layer are arranged in parallel. The metal shielding layer is wrapped by the first insulating layer, the first insulating layer is wrapped by the tensile layer, the second insulating layer is wrapped by the tensile layer, and the second insulating layer is wrapped by the protective layer. According to the utility model, through the arrangement of the tensile assembly, the tensile capability of the cable can be greatly improved, and the possibility that the cable is snapped during working is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flame-retardant cable for coal mining machines. Background Art

[0002] Coal is one of the important energy sources in my country. With the continuous development of my country's economic construction, the demand for electricity is increasing day by day, and the consumption of coal is also increasing, facing the danger of depletion. Major coal mines are stepping up the mining of thin coal seams, and conventional coal mining machine cables cannot meet the needs of coal mining machines.

[0003] Since the coal mining machine moves back and forth during the coal mining process, the coal mining machine and the power control cabinet are far away, so a long cable is needed to connect them. During the movement, the cable may even be severely bent in an "8" or "S" shape. The inner core of the bent cable is under great pressure and the outer core of the cable is under great tension, which in turn forms a great longitudinal tension on the cable when the coal mining machine is moving. Generally, the cable of the coal mining machine is easily broken during operation. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a flame-retardant cable for a coal mining machine, which solves the problem that the cable of the coal mining machine is easily broken during operation.

[0005] The utility model solves the above technical problems through the following technical means: a flame-retardant cable for a coal mining machine, comprising a wire group and a protective layer, the wire group is wrapped with an inner lining layer, a filling layer is arranged between the inner lining layer and the wire group, the inner lining layer is wrapped with a metal shielding layer, a tensile component is arranged outside the metal shielding layer, the tensile component comprises a first insulating layer and a tensile layer, the first insulating layer is wrapped outside the metal shielding layer, the tensile layer is wrapped outside the first insulating layer, the tensile layer is wrapped with a second insulating layer, and the protective layer is wrapped outside the second insulating layer.

[0006] Furthermore, the tensile components are divided into several groups, and the several groups of tensile components are sequentially arranged between the second insulating layer and the metal shielding layer.

[0007] Furthermore, the metal shielding layer is a copper mesh braided mesh.

[0008] Furthermore, the line group includes a control line core and a power line core, and the control line core and the power line core are arranged side by side.

[0009] Further, the cross section of the protective layer is a flat shape.

[0010] Furthermore, the outer surface of the protective layer is provided with grooves.

[0011] Furthermore, the outer surface of the protective layer is coated with a fire retardant coating.

[0012] Beneficial effects of the utility model:

[0013] 1. By setting up the tensile component, the tensile strength of the cable can be greatly improved, reducing the possibility of the cable being broken during operation.

[0014] 2. The control core and the power core are arranged side by side, which can increase the overall mechanical strength of the cable, prevent the line group from being scattered, and increase the service life of the cable during movement, winding and stretching.

[0015] 3. The flat-shaped protective layer of the cable can achieve a smaller bending radius, and the cable can be wound without knots and flat wires. The cable has the advantages of good flexibility, high tensile strength, long service life, wear resistance and good mobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the structure of a flame-retardant cable for a coal mining machine of the utility model;

[0018] in

[0019] 1. Line group; 101. Control line core; 102. Power line core;

[0020] 2. Filling layer; 3. Lining layer; 4. Metal shielding layer;

[0021] 5. tensile component; 501. first insulating layer; 502. tensile layer;

[0022] 6. Second insulation layer;

[0023] 7. Protective layer; 701. Groove. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0025] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0027] like Figure 1 As shown, the utility model is a flame-retardant cable for a coal mining machine, comprising a wire group 1 and a protective layer 7, the wire group 1 comprising a control wire core 101 and a power wire core 102, the control wire core 101 and the power wire core 102 are arranged side by side, the wire group 1 is wrapped with an inner lining layer 3, a filling layer 2 is arranged between the inner lining layer 3 and the wire group 1, the inner lining layer 3 is wrapped with a metal shielding layer 4, the metal shielding layer 4 is a copper mesh woven mesh, a tensile component 5 is arranged outside the metal shielding layer 4, the protective layer 7 is wrapped outside the tensile component 5, the cross-section of the protective layer 7 is a flat shape, the outer surface of the protective layer 7 is provided with a groove 701, and the outer surface of the protective layer 7 is coated with a fire retardant coating.

[0028] like Figure 1 As shown, the tensile component 5 includes a first insulating layer 501 and a tensile layer 502. The first insulating layer 501 is wrapped around the metal shielding layer 4, the tensile layer 502 is wrapped around the first insulating layer 501, the tensile layer 502 is wrapped around the second insulating layer 6, and the protective layer 7 is wrapped around the second insulating layer 6. The tensile component 5 is divided into several groups, and the several groups of tensile components 5 are arranged in sequence between the second insulating layer 6 and the metal shielding layer 4.

[0029] The operating principle of the utility model is as follows:

[0030] The tensile layer 502 is formed by stacking several layers of carbon fiber cloth, which has excellent tensile resistance. The first insulating layer 501 and the second insulating layer 6 can reduce the occurrence of leakage accidents. The metal shielding layer 4 can reduce the impact of the cable on external electrical equipment.

[0031] The control core 101 and the power core 102 are arranged side by side, which can increase the overall mechanical strength of the cable, prevent the line group 1 from being scattered, and increase the service life of the cable when moving, winding and stretching. The flat protective layer 7 of the cable can achieve a smaller bending radius, and the wire can be reeled in without knots and flat wires. The cable has the advantages of good flexibility, high tensile strength, long service life, wear resistance and good mobility.

[0032] The material of the filling layer 2 is glass fiber, which has the advantages of being non-flammable, heat-insulating, having high tensile strength and good electrical insulation.

[0033] The protective layer 7 is EPDM rubber, which has excellent heat resistance and can be used for a long time at 120°C. The addition of suitable antioxidants can increase its operating temperature. The physical properties of EPDM rubber are also excellent, which can improve the wear resistance of the cable, thereby increasing the service life of the cable. The groove 701 on the protective layer 7 can be used as a mark to identify the position of the internal wire core. When the fire-retardant coating is exposed to fire, it can generate a uniform and dense sponge-like foam insulation layer, which can effectively inhibit and block the spread and spread of flames, thereby protecting the cable.

[0034] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A flame-retardant cable for coal mining machine, characterized in that: It includes a wire group and a protective layer, the wire group is wrapped with an inner lining layer, a filling layer is arranged between the inner lining layer and the wire group, the inner lining layer is wrapped with a metal shielding layer, a tensile component is arranged outside the metal shielding layer, the tensile component includes a first insulating layer and a tensile layer, the first insulating layer is wrapped outside the metal shielding layer, the tensile layer is wrapped outside the first insulating layer, the tensile layer is wrapped with a second insulating layer, and the protective layer is wrapped outside the second insulating layer.

2. A flame-retardant cable for coal mining machines according to claim 1, characterized in that: The tensile components are divided into several groups, and the several groups of tensile components are sequentially arranged between the second insulating layer and the metal shielding layer.

3. A flame-retardant cable for coal mining machines according to claim 1, characterized in that: The metal shielding layer is a copper mesh braided mesh.

4. A flame-retardant cable for coal mining machines according to claim 1, characterized in that: The line group includes a control line core and a power line core, and the control line core and the power line core are arranged side by side.

5. The flame-retardant cable for coal mining machine according to claim 1, characterized in that: The cross section of the protective layer is flat.

6. A flame-retardant cable for coal mining machine according to claim 5, characterized in that: The outer surface of the protective layer is provided with grooves.

7. A flame-retardant cable for coal mining machine according to claim 6, characterized in that: The outer surface of the protective layer is coated with fire retardant paint.

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