Cable for coal mining machine

Abstract

The utility model discloses a cable for a coal mining machine, which relates to the technical field of cables and comprises an outer sheath arranged on the outer layer of the cable; a plurality of power line groups and a plurality of control line groups are arranged in the outer sheath; each power line group comprises a power line conductor, a power line conductor shielding layer is arranged outside the power line conductor, a power line metal shielding layer is arranged outside the power line conductor shielding layer, and a power line insulating layer is filled between the power line conductor shielding layer and the power line metal shielding layer; the plurality of control line groups comprise control line conductors, control line insulating layers are filled outside the control line conductors, and control line metal shielding layers are arranged outside the control line conductors; the center of the cable is provided with an optical fiber unit. According to the cable for the coal mining machine, the bending performance is improved, the cable has high insulation performance and tensile strength, cable short circuit and equipment shutdown are avoided, the service life of the cable is prolonged, the optical fiber unit has high tensile strength and toughness, and high-speed and stable optical fiber signal transmission is ensured.

Description

Technical Field

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

[0002] When the coal mining machine cables in domestic underground coal mines are in operation, they reciprocate back and forth at a bending radius of 2-3 times. During the bending movement, the coal mining machine cables rub against the cable clamps, and the cable sheath layer is easily worn. At the same time, the cables may be squeezed by coal blocks in the cable clamps, and the cable sheath is further damaged, which in turn affects the cable insulation layer, causing cable short circuits and equipment shutdowns, which can easily cause safety accidents, and the cable service life is not long. Utility Model Content

[0003] The purpose of the utility model is to provide a cable for a coal mining machine to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A cable for a coal mining machine, comprising:

[0006] An outer sheath, arranged on the outer layer of the cable;

[0007] A plurality of power line groups and a plurality of control line groups are arranged in the outer sheath;

[0008] Some of the power line groups include a power line conductor, a power line conductor shielding layer is arranged outside the power line conductor, a power line metal shielding layer is arranged outside the power line conductor shielding layer, and a power line insulation layer is filled between the power line conductor shielding layer and the power line metal shielding layer;

[0009] Some of the control line groups include control line conductors, the control line conductors are filled with a control line insulation layer, and the control line metal shielding layer is arranged outside the control line conductors;

[0010] An optical fiber unit is arranged at the center of the cable.

[0011] The coal mining machine cable according to this solution has at least the following technical effects:

[0012] The coal mining machine cable effectively reduces the stress on the control wire conductor when the cable is bent and is not easy to break, thereby improving the bending performance and having high insulation performance and tensile strength. The insulation shield is removable and can be easily maintained and replaced to ensure the safety and stability of the cable. The outer sheath is made of high-strength and high-tear-resistant rubber material, which has good wear resistance and aging resistance, avoiding cable short circuits and equipment shutdowns, and effectively extending the service life of the cable. At the same time, the optical fiber unit has high tensile strength and toughness, which can ensure high-speed and stable optical fiber signal transmission.

[0013] As a further solution of the utility model: a braided reinforcement layer is provided between the plurality of power line groups and the plurality of control line groups and the outer sheath.

[0014] Because a braided reinforcement layer is arranged between several power line groups and several control line groups and the outer sheath, and Kevlar fiber is used, the reinforcing fiber is tightly combined with the outer sheath, which effectively prevents the cable from twisting during installation, laying and use, and extends the service life of the cable.

[0015] As a further solution of the utility model: the power line insulation layer and the control line insulation layer are independently selected from ethylene propylene rubber insulation rubber layers.

[0016] Since the power line insulation layer and the control line insulation layer are independently selected as EPDM insulation rubber layers, the tensile strength of the power line insulation layer reaches 11.0MPa, the power line insulation resistance reaches 680MΩ·km, and the tensile strength of the control line insulation layer reaches 10.8MPa, which effectively improves the insulation performance and withstand voltage strength of the cable.

[0017] As a further solution of the utility model: a plurality of the power line groups and a plurality of the control line groups are arranged in an alternating manner, and the optical fiber unit is arranged between the plurality of the power line groups.

[0018] Since several power line groups and several control line groups are arranged in an interlaced manner, the optical fiber units are arranged between the several power line groups so that they are arranged alternately, which increases the flexibility of wiring. This layout method can reduce mutual interference between line groups and improve anti-interference ability; at the same time, it helps to improve space utilization and the mechanical strength of the cable.

[0019] As a further solution of the utility model: a plurality of the power line groups and a plurality of the control line groups are evenly arranged, and the optical fiber unit is arranged between the plurality of the power line groups and the plurality of the control line groups.

[0020] Since several power line groups and several control line groups are evenly arranged, the optical fiber units are set between the several power line groups and the several control line groups to make them evenly distributed, maintain a relatively stable distance between the line groups, and improve the stability and consistency of signal transmission between the line groups. This layout method can effectively isolate the mutual interference of signals between the power line groups and the control line groups, and provide higher anti-interference ability; at the same time, it can better utilize the space and facilitate maintenance and fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0022] Figure 1This is a schematic diagram of the structure of a cable for a coal mining machine according to the first embodiment;

[0023] Figure 2 This is a schematic diagram of the cable structure for a coal mining machine according to the second embodiment.

[0024] Reference numerals:

[0025] 101. Outer sheath; 102. Power line conductor; 103. Power line conductor shielding layer; 104. Power line metal shielding layer; 105. Power line insulation layer; 106. Control line conductor; 107. Control line insulation layer; 108. Control line metal shielding layer; 109. Optical fiber unit; 110. Braided reinforcement layer. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] like Figure 1 The embodiment of the utility model shown is a cable for coal mining machines, comprising: an outer sheath 101, the outer sheath 101 is made of high-strength and high-tear-resistant rubber material, and is arranged on the outer layer of the cable; a plurality of power line groups and a plurality of control line groups are arranged in the outer sheath 101; the plurality of power line groups include a power line conductor 102, the power line conductor 102 is a tinned soft copper stranded wire, a power line conductor shielding layer 103 is arranged outside the power line conductor 102, a power line metal shielding layer 104 is arranged outside the power line conductor shielding layer 103, and a power line insulation layer 105 is filled between the power line conductor shielding layer 103 and the power line metal shielding layer 104; the plurality of control line groups include a control line conductor 106, the control line conductor 106 is filled with a control line insulation layer 107, and a control line metal shielding layer 108 is arranged outside the control line conductor 106; an optical fiber unit 109 is arranged in the center of the cable, and the optical fiber unit 109 is made of stainless steel armor and reinforced with multiple strands of high-strength fibers.

[0033] Specifically, the coal mining machine cable effectively reduces the stress on the control line conductor 102 when the cable is bent and is not easy to break, thereby improving the bending performance and having high insulation performance and tensile strength. The insulation shield is removable and can be easily maintained and replaced to ensure the safety and stability of the cable. The outer sheath 101 adopts high-strength and high-tear-resistant rubber material, which has good wear resistance and aging resistance, avoids cable short circuits and equipment shutdowns, and effectively extends the service life of the cable. At the same time, the optical fiber unit 109 has high tensile strength and toughness, which can ensure high-speed and stable optical fiber signal transmission.

[0034] like Figure 1 As shown, a braided reinforcement layer 110 is provided between the plurality of power line groups and the plurality of control line groups and the outer sheath 101 .

[0035] Specifically, since a braided reinforcement layer 110 is provided between several power line groups and several control line groups and the outer sheath 101, and Kevlar fiber is used, the reinforcing fiber is tightly combined with the outer sheath 101, effectively preventing the cable from twisting during installation, laying and use, thereby extending the service life of the cable.

[0036] like Figure 1 As shown, the power line insulation layer 105 and the control line insulation layer 107 are independently selected from ethylene propylene rubber insulation rubber layers.

[0037] Specifically, since the power line insulation layer 105 and the control line insulation layer 107 are independently selected as EPDM insulation rubber layers, the tensile strength of the power line insulation layer 105 reaches 11.0 MPa, and the power line insulation resistance reaches 680 MΩ·km. At the same time, the tensile strength of the control line insulation layer 107 reaches 10.8 MPa, which effectively improves the insulation performance and withstand voltage strength of the cable.

[0038] like Figure 1 As shown, several power line groups and several control line groups are arranged in an interlaced manner, and the optical fiber unit 109 is arranged between the several power line groups.

[0039] Specifically, since several power line groups and several control line groups are staggered, the optical fiber unit 109 is set between several power line groups so that they are arranged alternately, which increases the flexibility of wiring. This layout method can reduce mutual interference between line groups and improve anti-interference ability; at the same time, it helps to improve space utilization and the mechanical strength of the cable.

[0040] like Figure 2 Another embodiment of the utility model is shown, and the similarities with the previous embodiment are not repeated. The cable has several power line groups and several control line groups evenly arranged, and the optical fiber unit 109 is arranged between the several power line groups and the several control line groups.

[0041] Specifically, since several power line groups and several control line groups are evenly arranged, the optical fiber unit 109 is set between the several power line groups and the several control line groups to make them evenly distributed, maintain a relatively stable distance between the line groups, and improve the stability and consistency of signal transmission between the line groups. This layout method can effectively isolate the mutual interference of signals between the power line groups and the control line groups, and provide higher anti-interference ability; at the same time, it can better utilize the space and facilitate maintenance and fault detection.

[0042] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A cable for a coal mining machine, characterized in that: include: An outer sheath (101) is arranged on the outer layer of the cable; A plurality of power line groups and a plurality of control line groups are arranged in the outer sheath (101); The plurality of power line groups comprise a power line conductor (102), a power line conductor shielding layer (103) being arranged outside the power line conductor (102), a power line metal shielding layer (104) being arranged outside the power line conductor shielding layer (103), and a power line insulation layer (105) being filled between the power line conductor shielding layer (103) and the power line metal shielding layer (104); Several of the control line groups include a control line conductor (106), the control line conductor (106) is filled with a control line insulation layer (107) outside, and a control line metal shielding layer (108) is arranged outside the control line conductor (106); An optical fiber unit (109) is arranged at the center of the cable.

2. The cable for coal mining machine according to claim 1, characterized in that: A braided reinforcement layer (110) is provided between the plurality of power line groups and the plurality of control line groups and the outer sheath (101).

3. The cable for coal mining machine according to claim 2, characterized in that: The power line insulation layer (105) and the control line insulation layer (107) are independently selected from ethylene propylene rubber insulation rubber layers.

4. The cable for coal mining machine according to claim 3, characterized in that: The plurality of power line groups and the plurality of control line groups are arranged in an interlaced manner, and the optical fiber unit (109) is arranged between the plurality of power line groups.

5. The cable for coal mining machine according to claim 3, characterized in that: The plurality of power line groups and the plurality of control line groups are evenly arranged, and the optical fiber unit (109) is arranged between the plurality of power line groups and the plurality of control line groups.

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