Optical fiber composite cable for coal mining machine

Abstract

The utility model discloses an optical fiber composite cable for a coal mining machine, which comprises a control wire core, a plurality of power wire cores, a ground wire core, an optical fiber wire core and a sheath assembly, and is characterized in that each power wire core and the control wire core are annularly distributed so as to define a space; the adjacent power wire cores abut against each other, and the adjacent power wire cores and the control wire core abut against each other. The ground wire core is arranged in the space and abuts against the control wire core and the power wire cores. The optical fiber wire core is arranged on the outer side between the control wire core and one of the power wire cores; the sheath assembly wraps the control wire core, the power wire cores and the optical fiber wire core. The beneficial effects of the utility model are that the cable with the above structure enables the shielding layers of different wire cores to be in better contact and connected in parallel, enhances the shielding effect, and enables the short-circuit current borne by the ground wire core to be larger.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an optical fiber composite shearer cable. Background Art

[0002] A shearer is a large and complex system integrating machinery, electricity and hydraulics, and is also one of the important equipment for realizing the mechanization and modernization of coal mine production. Shearers usually carry out coal mining operations in harsh working environments such as underground and in caves. It is impossible for workers to follow the operations for a long time. This requires the shearer to have the function of intelligent unmanned mining operations. To achieve unmanned mining, an optical fiber composite cable is inevitably required.

[0003] The existing optical fiber composite cable (such as a non-metallic shielded monitoring and strengthened optical fiber composite flexible cable for shearers disclosed in the application number 202122845915.0) includes a power core, a control core, a ground core and an optical fiber core. The ground core is wound around the outside of the control core, and the optical fiber core is located in the side gap of the power core. However, the shielding effect between different cores of the cable with the above structure is poor. In addition, the short-circuit current that the ground core can withstand is small. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies, and propose an optical fiber composite shearer cable to solve the technical problems of poor shielding effect between different cores of the existing optical fiber composite cable and small short-circuit current that the ground core can withstand.

[0005] To achieve the above technical purpose, the technical solution of the utility model provides an optical fiber composite shearer cable, including:

[0006] A control core;

[0007] A plurality of power cores, which are annularly distributed with the control core to enclose a space, and adjacent power cores and adjacent power cores and the control core are in contact with each other;

[0008] A ground core, which is arranged in the space and is in contact with the control core and each power core;

[0009] An optical fiber core, which is arranged on the outside between the control core and one of the power cores;

[0010] A sheath assembly, which is wrapped outside the control core, each power core and the optical fiber core.

[0011] Furthermore, the control core, each power core, the ground core and the optical fiber core are stranded into a cable.

[0012] Further, the control core includes a plurality of conductor assemblies, a first tape layer, a first braided shielding layer, a wrapped shielding layer, a second tape layer, and a first sheath. The conductor assemblies are in contact with each other and are distributed in a circular shape. The first tape layer wraps around the outside of each conductor assembly. The first braided shielding layer wraps around the outside of the first tape layer. The wrapped shielding layer wraps around the outside of the first braided shielding layer. The second tape layer wraps around the outside of the wrapped shielding layer. The first sheath wraps around the outside of the second tape layer.

[0013] Further, each of the conductor assemblies is stranded into a cable.

[0014] Further, the conductor assembly includes a first conductor, a first isolation layer, a first insulating layer, and a third tape layer. The first isolation layer wraps around the outside of the first conductor. The first insulating layer wraps around the outside of the first isolation layer. The third tape layer wraps around the outside of the first insulating layer.

[0015] Further, the power core includes a second conductor, a second isolation layer, a second insulating layer, a semi-conductive layer, and a second braided shielding layer. The second isolation layer wraps around the outside of the second conductor. The second insulating layer wraps around the outside of the second isolation layer. The semi-conductive layer wraps around the outside of the second insulating layer. The second braided shielding layer wraps around the outside of the semi-conductive layer.

[0016] Further, the ground core includes a third conductor and a semi-conductive rubber layer. The semi-conductive rubber layer wraps around the outside of the third conductor.

[0017] Further, the fiber optic core includes an optical unit, an extruded Kevlar sheath layer, a first helical armor layer, a buffer layer, and a second helical armor layer. The extruded Kevlar sheath layer wraps around the outside of the optical unit. The first helical armor layer wraps around the outside of the extruded Kevlar sheath layer. The buffer layer wraps around the outside of the first helical armor layer. The second helical armor layer wraps around the outside of the buffer layer.

[0018] Further, the fiber optic composite shearer cable further includes a filling, and the filling is disposed in the gaps between the sheath assembly and the control core, each of the power cores, the ground core, and the fiber optic core.

[0019] Further, the sheath assembly includes a second sheath, a braided reinforcement layer, and a third sheath. The second sheath wraps around the outside of the control core, each of the power cores, and the fiber optic core. The braided reinforcement layer is embedded in the third sheath and wraps around the outside of the second sheath.

[0020] Compared with the prior art, the beneficial effects of the present utility model include: the ground wire core is arranged in the middle of each power wire core and control wire core, and is in contact with the control wire core and each power wire core. Compared with other positions, on the one hand, it can more effectively resist the impact of falling coal gangue or large coal blocks on the coal mining machine working face, avoiding external mechanical damage to the ground wire core during use. On the other hand, it can make the shielding layers of different wire cores better contact and be connected in parallel, enhancing the shielding effect. At the same time, it can also make the short-circuit current borne by the ground wire core larger. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of an optical fiber composite coal mining machine cable provided by the present utility model;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the control wire core in

[0023] Figure 3 is Figure 1 a schematic structural diagram of the power wire core in

[0024] In the figure: 100 - control wire core, 110 - conductor assembly, 111 - first conductor, 112 - first isolation layer, 113 - first insulating layer, 114 - third tape layer, 120 - first tape layer, 130 - first braided shielding layer, 140 - wrapped shielding layer, 150 - second tape layer, 160 - first sheath, 200 - power wire core, 210 - second conductor, 220 - second isolation layer, 230 - second insulating layer, 240 - semiconductive layer, 250 - second braided shielding layer, 300 - ground wire core, 310 - third conductor, 320 - semiconductive rubber layer, 400 - optical fiber core, 500 - sheath assembly, 510 - second sheath, 520 - braided reinforcement layer, 530 - third sheath, 600 - filling. Detailed Embodiment

[0025] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] The present utility model provides an optical fiber composite coal mining machine cable, and its structure is as shown in Figure 1 - Figure 3As shown, it includes a control core 100, several power cores 200, a ground core 300, an optical fiber core 400 and a sheath assembly 500. Each of the power cores 200 and the control core 100 are annularly distributed to enclose a space. Adjacent power cores 200 and between adjacent power cores 200 and the control core 100 are in contact with each other; the ground core 300 is arranged in the space and is in contact with the control core 100 and each of the power cores 200; the optical fiber core 400 is arranged outside between the control core 100 and one of the power cores 200; the sheath assembly 500 wraps around the outside of the control core 100, each of the power cores 200 and the optical fiber core 400.

[0027] The ground core 300 is arranged in the middle of each of the power cores 200 and the control core 100 and is in contact with the control core 100 and each of the power cores 200. Compared with other positions, on the one hand, it can more effectively resist the impact of falling coal gangue or large coal blocks on the shearer working face, avoiding external mechanical damage to the ground core 300 during use. On the other hand, it can make the shielding layers of different cores better contact and be connected in parallel, enhancing the shielding effect. At the same time, it can also make the short-circuit current borne by the ground core 300 larger. Various control signals can be transmitted through the control core 100, electric power can be transmitted through the power core 200, the equipment can be grounded through the ground core 300, and the current can be introduced into the ground. Optical signals can be transmitted through the optical fiber core 400, with powerful functions.

[0028] As a preferred embodiment, the control core 100, each of the power cores 200, the ground core 300 and the optical fiber core 400 are stranded into a cable to increase the strength.

[0029] As a preferred embodiment, please refer to Figure 2, the control core 100 includes a plurality of conductor assemblies 110, a first tape layer 120, a first braided shielding layer 130, a wrapped shielding layer 140, a second tape layer 150 and a first sheath 160. Each of the conductor assemblies 110 abuts against each other and is distributed in a ring shape. The first tape layer 120 is wrapped around the outside of each of the conductor assemblies 110. The first braided shielding layer 130 is wrapped around the outside of the first tape layer 120. The wrapped shielding layer 140 is wrapped around the outside of the first braided shielding layer 130. The second tape layer 150 is wrapped around the outside of the wrapped shielding layer 140. The first sheath 160 is wrapped around the outside of the second tape layer 150. The first tape layer 120 is wrapped around the outside of each of the conductor assemblies 110 by a wrapping method. The second tape layer 150 is wrapped around the outside of the wrapped shielding layer 140 by a wrapping method. The first braided shielding layer 130 is composed of braided copper wires. The wrapped shielding layer 140 is composed of wrapped metal plastic tapes.

[0030] As a preferred embodiment, each of the conductor assemblies 110 is stranded into a cable.

[0031] As a preferred embodiment, please refer to Figure 2 , the conductor assembly 110 includes a first conductor 111, a first isolation layer 112, a first insulation layer 113 and a third tape layer 114. The first isolation layer 112 is wrapped around the outside of the first conductor 111. The first insulation layer 113 is wrapped around the outside of the first isolation layer 112. The third tape layer 114 is wrapped around the outside of the first insulation layer 113. The third tape layer 114 is wrapped around the outside of the first insulation layer 113 by a wrapping method. The structure of the control core 100 can enhance its own shielding effect and make it not easy for the power core 200 and the control core 100 to affect each other, and the anti-interference ability is strong.

[0032] As a preferred embodiment, please refer to Figure 3 , the power core 200 includes a second conductor 210, a second isolation layer 220, a second insulation layer 230, a semi-conductive layer 240 and a second braided shielding layer 250. The second isolation layer 220 is wrapped around the outside of the second conductor 210. The second insulation layer 230 is wrapped around the outside of the second isolation layer 220. The semi-conductive layer 240 is wrapped around the outside of the second insulation layer 230. The second braided shielding layer 250 is wrapped around the outside of the semi-conductive layer 240. The structure of the power core 200 can enhance its own shielding effect and make it not easy for the power core 200 and the control core 100 to affect each other, and the anti-interference ability is strong.

[0033] As a preferred embodiment, both the first insulating layer 113 and the second insulating layer 230 are made of ethylene propylene rubber mixture, which is composed of materials such as ethylene propylene rubber, anti-aging agent, filler, vulcanizing agent, softening agent, etc.

[0034] As a preferred embodiment, please refer to Figure 1 , the ground wire core 300 includes a third conductor 310 and a semi-conductive rubber layer 320. The semi-conductive rubber layer 320 is wrapped around the outside of the third conductor 310, and the semi-conductive rubber layer 320 is wrapped around the outside of the third conductor 310 by extrusion.

[0035] As a preferred embodiment, the first conductor 111, the second conductor 210 and the third conductor 310 are all tinned copper wires, and are formed into a columnar structure conductor through bunch stranding and composite stranding.

[0036] As a preferred embodiment, the optical fiber core 400 includes an optical unit, an extruded Kevlar sheath, a first spiral armor layer, a buffer layer and a second spiral armor layer. The extruded Kevlar sheath is wrapped around the outside of the optical unit, the first spiral armor layer is wrapped around the outside of the extruded Kevlar sheath, the buffer layer is wrapped around the outside of the first spiral armor layer, and the second spiral armor layer is wrapped around the outside of the buffer layer.

[0037] As a preferred embodiment, please refer to Figure 1 , the fiber optic composite shearer cable further includes a filler 600, and the filler 600 is disposed in the gaps between the sheath assembly 500 and the control wire core 100, each of the power wire cores 200, the ground wire core 300 and the optical fiber core 400.

[0038] As a preferred embodiment, please refer to Figure 1 , the sheath assembly 500 includes a second sheath 510, a braided reinforcement layer 520 and a third sheath 530. The second sheath 510 is wrapped around the outside of the control wire core 100, each of the power wire cores 200 and the optical fiber core 400. The braided reinforcement layer 520 is embedded in the third sheath 530 and wrapped around the outside of the second sheath 510. The second sheath 510 is wrapped around the outside of the control wire core 100, each of the power wire cores 200 and the optical fiber core 400 by extrusion. The braided reinforcement layer 520 is embedded in the third sheath 530 to form an integral body.

[0039] As a preferred embodiment, the third sheath 530 and the second sheath 510 are bonded into an integral body. Both the third sheath 530 and the second sheath 510 are made of rubber mixture, which is composed of materials such as chlorinated polyethylene rubber, anti-aging agent, filler, vulcanizing agent, softening agent, etc.

[0040] For a better understanding of the present utility model, the working principle of the technical solution of the present utility model will be described in detail below in conjunction with Figure 1 - Figure 3 the following:

[0041] The ground wire core 300 is arranged in the middle of each of the power wire cores 200 and the control wire core 100, and is in contact with both the control wire core 100 and each of the power wire cores 200. Compared with other positions, on the one hand, it can more effectively resist the impact of falling coal gangue or large coal blocks on the coal shearer working face, avoiding external mechanical damage to the ground wire core 300 during use. On the other hand, it can make the shielding layers of different wire cores better contact and be connected in parallel, enhancing the shielding effect. At the same time, it can also make the short-circuit current borne by the ground wire core 300 larger. Various control signals can be transmitted through the control wire core 100, electric power can be transmitted through the power wire core 200, the equipment can be grounded through the ground wire core 300 to introduce the current into the ground, and optical signals can be transmitted through the optical fiber wire core 400. It has powerful functions. The structures of the control wire core 100 and the power wire core 200 can enhance their own shielding effects and make it not easy for the power wire core 200 and the control wire core 100 to affect each other, with strong anti-interference ability.

[0042] A fiber composite coal shearer cable provided by the present utility model has the following beneficial effects:

[0043] (1) Since there is no ground wire in the fiber composite cable with the above structure, and the ground wire core 300 is arranged in the middle of the power wire core 200 and the control wire core 100, compared with other positions, it can more effectively resist the impact of falling coal gangue or large coal blocks on the coal shearer working face, avoiding external mechanical damage to the ground wire core 300 during use;

[0044] (2) The structures of the control wire core 100 and the power wire core 200, on the one hand, can enhance their own shielding effects and make it not easy for the power wire core 200 and the control wire core 100 to affect each other, with strong anti-interference ability. On the other hand, it can also increase the compressive and tensile resistance of the cable;

[0045] (3) The cable with this structure can make the shielding layers of different wire cores better contact and be connected in parallel, enhancing the shielding effect. At the same time, it can also make the short-circuit current borne by the ground wire core 300 larger.

[0046] The above specific embodiments of the present utility model do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included within the protection scope of the claims of the present utility model.

Claims

1. An optical fiber composite coal mining machine cable, characterized in that: include: A control core, the control core comprising a plurality of conductor components, a first tape layer, a first braided shielding layer, a wrapped shielding layer, a second tape layer and a first sheath, the conductor components abutting each other and being distributed in a ring shape, the first tape layer wrapped around the outside of each conductor component, the first braided shielding layer wrapped around the outside of the first tape layer, the wrapped shielding layer wrapped around the outside of the first braided shielding layer, the second tape layer wrapped around the outside of the wrapped shielding layer, and the first sheath wrapped around the outside of the second tape layer; A plurality of power cores are distributed in a ring shape with the control core to enclose a space, and adjacent power cores and adjacent power cores and control cores are in contact with each other, and the power core comprises a second conductor, a second isolation layer, a second insulating layer, a semiconductive layer and a second braided shielding layer, wherein the second isolation layer is wrapped around the outside of the second conductor, the second insulating layer is wrapped around the outside of the second isolation layer, the semiconductive layer is wrapped around the outside of the second insulating layer, and the second braided shielding layer is wrapped around the outside of the semiconductive layer; A ground wire core is arranged in the space and abuts against the control wire core and each of the power wire cores, wherein the ground wire core comprises a third conductor and a semi-conductive rubber layer, wherein the semi-conductive rubber layer is wrapped around the outside of the third conductor; An optical fiber core is arranged outside the control core and one of the power cores, the optical fiber core comprises an optical unit, an extruded Kevlar sheath, a first spiral armor layer, a buffer layer and a second spiral armor layer, the extruded Kevlar sheath is wrapped around the outside of the optical unit, the first spiral armor layer is wrapped around the outside of the extruded Kevlar sheath, the buffer layer is wrapped around the outside of the first spiral armor layer, and the second spiral armor layer is wrapped around the outside of the buffer layer; A sheath assembly is wrapped around the control core, each of the power cores and the optical fiber core. The sheath assembly includes a second sheath, a braided reinforcement layer and a third sheath. The second sheath is wrapped around the control core, each of the power cores and the optical fiber core. The braided reinforcement layer is embedded in the third sheath and wrapped around the second sheath.

2. The optical fiber composite coal mining machine cable according to claim 1, characterized in that: The control wire core, each of the power wire cores, the ground wire core and the optical fiber wire core are twisted into a cable.

3. The optical fiber composite coal mining machine cable according to claim 1, characterized in that: The conductor assemblies are twisted into a cable.

4. The optical fiber composite coal mining machine cable according to claim 1, characterized in that: The conductor assembly includes a first conductor, a first isolation layer, a first insulating layer and a third tape layer, wherein the first isolation layer is wrapped around the outside of the first conductor, the first insulating layer is wrapped around the outside of the first isolation layer, and the third tape layer is wrapped around the outside of the first insulating layer.

5. The optical fiber composite coal mining machine cable according to claim 1, characterized in that: It also includes a filler, which is arranged in the gap between the sheath assembly and the control wire core, each of the power wire cores, the ground wire core and the optical fiber wire core.

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