Metallic shielding rubber jacketed flexible cable for coal mine frequency conversion device

Abstract

The utility model relates to a metal shielding rubber jacketed flexible cable for a coal mine frequency conversion device, which comprises a plurality of power wire core conductors which are arranged in an attached manner. The insulation shielding layer wraps the surface of each power wire core conductor; the metal shielding layer wraps the surface of the insulation shielding layer; the total shielding layer wraps the metal shielding layers on the surfaces of the power wire core conductors, the total shielding layer comprises a braided shielding layer and a metal plastic composite belt layer, and the braided shielding layer wraps the metal shielding layers on the surfaces of the power wire core conductors; and the metal plastic composite belt layer wraps the outside of the braided shielding layer. According to the metal shielding rubber jacketed flexible cable for the coal mine frequency conversion device, the plurality of power wire core conductors, the insulation shielding layer, the metal shielding layer and the total shielding layer are arranged, and the plurality of power wire core conductors pass through the metal shielding layer and the total shielding layer, so that anti-interference signals are ensured, and the suppression capability of higher harmonics is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a metal shielded rubber sheathed soft cable for a coal mine frequency conversion device. Background Art

[0002] Cable is a device for transmitting electric energy or signals. It is usually made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. Cables are usually rope-like cables twisted together by several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and often twisted around a center. The entire outer layer is covered with a highly insulating covering. The cable has the characteristics of being energized inside and insulated outside. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of wires and an insulating layer, and are used to connect circuits, electrical appliances, etc. Metal shielded rubber-sheathed flexible cables for coal mine frequency conversion devices are a type of cable.

[0003] Nowadays, the metal shielded rubber sheathed flexible cable used in coal mine frequency conversion devices needs to be improved in terms of anti-interference signals, which affects the use of flexible cables. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, to provide a metal shielded rubber sheathed flexible cable for a coal mine frequency conversion device, and to solve the technical problem in the prior art that the anti-interference signal needs to be improved.

[0005] In order to achieve the above-mentioned technical purpose, the technical solution of the utility model includes a metal shielded rubber sheathed flexible cable for a coal mine frequency conversion device, including a plurality of power core conductors, which are arranged close to each other; an insulating shielding layer, which is wrapped around the surface of each of the power core conductors; a metal shielding layer, which is wrapped around the surface of the insulating shielding layer; and a total shielding layer, which is wrapped around the outside of the metal shielding layer on the surface of a plurality of the power core conductors. The plurality of power core conductors pass through the metal shielding layer and the total shielding layer to ensure anti-interference signals, so as to improve the suppression capability of high-order harmonics.

[0006] Preferably, the overall shielding layer includes a braided shielding layer and a metal-plastic composite tape layer, the braided shielding layer is coated on the outside of the metal shielding layer on the surface of several power line core conductors, and the metal-plastic composite tape layer is wrapped on the outside of the braided shielding layer.

[0007] Preferably, it also includes a cushion core, which is filled in the center surrounded by several power line core conductors.

[0008] Preferably, it further comprises a power line core insulation layer, wherein the power line core insulation layer is wrapped around the surface of the power line core conductor, and the power line core insulation layer is located between the power line core conductor and the insulating shielding layer.

[0009] Preferably, it further comprises an inner lining layer, wherein the inner lining layer is wrapped around the outside of the plurality of power line core conductors, and the inner lining layer is in contact with the inner wall of the braided shielding layer, and the metal shielding layer is located inside the inner lining layer.

[0010] Preferably, it also includes an outer sheath, which is wrapped around the outside of the metal-plastic composite tape layer.

[0011] Preferably, it further comprises a control core conductor, wherein the control core conductor is filled between a plurality of the power core conductors and the inner lining layer.

[0012] Preferably, the insulating shielding layer is made of semi-conductive insulating shielding rubber.

[0013] Preferably, the gasket core is semi-conductive rubber.

[0014] Preferably, the braided shielding layer is braided with tinned copper wires.

[0015] Compared with the prior art, the beneficial effects of the utility model include: the metal shielded rubber sheathed flexible cable for the coal mine frequency conversion device, through the arrangement of a plurality of power line core conductors, an insulating shielding layer, a metal shielding layer and a total shielding layer, a plurality of power line core conductors pass through the metal shielding layer and the total shielding layer, thereby ensuring anti-interference signals and improving the ability to suppress high-order harmonics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a cross-sectional view of the end face of a metal shielded rubber sheathed flexible cable for a coal mine frequency conversion device. DETAILED DESCRIPTION

[0017] 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 here are only used to explain the utility model and are not used to limit the utility model.

[0018] like Figure 1As shown, the utility model provides a metal shielded rubber sheathed flexible cable for a coal mine frequency conversion device, comprising a plurality of power core conductors 10, an insulating shielding layer 20, a metal shielding layer 30 and a total shielding layer 40; a plurality of the power core conductors 10 are arranged close to each other; the insulating shielding layer 20 is wrapped around the surface of each of the power core conductors 10; the metal shielding layer 30 is wrapped around the surface of the insulating shielding layer 20; the total shielding layer 40 is coated on the outside of the metal shielding layer 30 on the surface of a plurality of the power core conductors 10, and a plurality of the power core conductors 10 are connected via the metal shielding layer 30 and the total shielding layer 40 to ensure anti-interference signals, so as to improve the suppression capability of high-order harmonics.

[0019] This metal shielded rubber sheathed flexible cable is a metal shielded rubber sheathed flexible cable used for coal mine frequency conversion devices with a rated voltage of 1.9 / 3.3kV.

[0020] The metal shielding layer 30 is a tinned soft copper conductor.

[0021] The metal shielding layer 30 also serves as a ground core.

[0022] By setting up several power line core conductors 10, insulating shielding layer 20, metal shielding layer 30 and total shielding layer 40, several power line core conductors 10 pass through the metal shielding layer 30 and the total shielding layer 40 to ensure anti-interference signals and improve the suppression capability of high-order harmonics.

[0023] The insulating shielding layer 20 is made of semi-conductive insulating shielding rubber. In this embodiment, the insulating shielding layer 20 is made of extruded black semi-conductive insulating shielding rubber.

[0024] In this embodiment, specifically, the overall shielding layer 40 includes a braided shielding layer 41 and a metal-plastic composite tape layer 42, wherein the braided shielding layer 41 is coated on the outside of the metal shielding layer 30 on the surface of the plurality of power core conductors 10, and the metal-plastic composite tape layer 42 is wrapped on the outside of the braided shielding layer 41. In this embodiment, the braided shielding layer 41 is braided with tinned copper wires.

[0025] The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device further comprises an outer sheath 80 , and the outer sheath 80 is wrapped around the outside of the metal-plastic composite belt layer 42 .

[0026] In this embodiment, the outer sheath 80 is made of black XH-03A type chlorinated polyethylene rubber extruded through a continuous vulcanizer.

[0027] The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device further comprises a cushion core 50 , and the cushion core 50 is filled in the center surrounded by a plurality of the power line core conductors 10 .

[0028] In this embodiment, the gasket core 50 is semi-conductive rubber.

[0029] The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device also includes a power core insulation layer 60 and an inner lining layer 70, wherein the power core insulation layer 60 is wrapped around the surface of the power core conductor 10, and the power core insulation layer 60 is located between the power core conductor 10 and the insulating shielding layer 20. The inner lining layer 70 is wrapped around the outside of a plurality of the power core conductors 10, and the inner lining layer 70 is in contact with the inner wall of the braided shielding layer 41, and the metal shielding layer 30 is located inside the inner lining layer 70.

[0030] In this embodiment, the power line core insulation layer 60 and the insulation shielding layer 20 are co-extruded in one step by a continuous vulcanizer. The power line core insulation layer 60 is made of extruded XJ-30A type white EPDM insulation glue. The insulation shielding layer 20 is made of extruded black semi-conductive insulation shielding rubber.

[0031] In this embodiment, the inner lining layer 70 is composed of a layer of non-woven fabric and a layer of polyester tape, with the non-woven fabric on the inside and the polyester tape on the outside.

[0032] The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device further includes a control core conductor 90, which is filled between the plurality of power core conductors 10 and the inner lining layer 70. In this embodiment, the control core conductor 90 is filled between the metal shielding layer 30 and the inner lining layer 70.

[0033] The power line core conductor 10 adopts a double-sided semi-conductive nylon tape wrapping and a metal shielded tinned copper wire braided shielding structure. The metal shielding layer 30 also serves as the ground wire core. Five 0.3mm colored yarns are placed between the insulating shielding layer 20 and the double-sided semi-conductive nylon tape. The colors are red, white and blue. The control line core conductor 90 is wrapped with aluminum foil and polyester tape from the inside to the outside. When wrapping, the metal side of the aluminum foil faces inward. Five tinned copper wires with a diameter of 0.2mm and five colored yarns with a diameter of 0.3mm are placed in parallel between the insulating shielding layer 20 and the aluminum foil. The colors of the colored yarns are red, white and blue respectively. The control line core conductor 90 and the power line core The color of the conductor 10 remains consistent. All cores except the control core conductor 90 should be detwisted, and the cable twisting direction is right-handed. The cushion core 50 is placed in the center of the cable core. The cushion core 50 is extruded from semi-conductive rubber. The filling part of the lining layer 70 is extruded from rubber. The lining layer 70 is composed of a layer of non-woven fabric and a layer of polyester tape, with the non-woven fabric inside. The total shielding layer 40 is located between the lining layer 70 and the outer sheath 80. The total shielding layer 40 includes a braided shielding layer 41 and a metal-plastic composite tape layer 42, that is, a layer of aluminum foil tape is wrapped around the braided shielding layer 41 in the right direction, with the metal layer facing inward, and a layer of non-woven fabric is wrapped around the aluminum foil tape.

[0034] In this embodiment, three power line core conductors 10 are provided.

[0035] The coal mine frequency conversion device uses metal shielded rubber sheathed soft cable, which makes the product's shielding ideal coefficient smaller, has better anti-interference signal, and has a stronger ability to suppress high-order harmonics.

[0036] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A metal shielded rubber sheathed flexible cable for coal mine frequency conversion device, characterized in that: include Several power line core conductors are arranged close to each other; An insulating shielding layer wrapped around the surface of each power line core conductor; A metal shielding layer wrapped around the surface of the insulating shielding layer; The total shielding layer is coated on the outside of the metal shielding layer on the surface of the plurality of power line core conductors. The plurality of power line core conductors are protected against interference signals via the metal shielding layer and the total shielding layer, so as to improve the ability to suppress high-order harmonics.

2. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 1, characterized in that: The overall shielding layer comprises a braided shielding layer and a metal-plastic composite tape layer. The braided shielding layer is coated on the outside of the metal shielding layers on the surfaces of several power line core conductors, and the metal-plastic composite tape layer is wrapped on the outside of the braided shielding layer.

3. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 1 is characterized in that: It also includes a cushion core, which is filled in the center surrounded by a plurality of power line core conductors.

4. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 1, characterized in that: It also includes a power line core insulation layer, which is wrapped around the surface of the power line core conductor and is located between the power line core conductor and the insulating shielding layer.

5. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 2, characterized in that: It also includes an inner lining layer, which is wrapped around the outside of the plurality of power line core conductors, and the inner lining layer is in contact with the inner wall of the braided shielding layer, and the metal shielding layer is located inside the inner lining layer.

6. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 2, characterized in that: It also includes an outer sheath, which is wrapped around the outside of the metal-plastic composite tape layer.

7. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 5, characterized in that: It also includes a control core conductor, which is filled between a plurality of the power core conductors and the inner lining layer.

8. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 1, characterized in that: The insulating shielding layer is made of semi-conductive insulating shielding rubber.

9. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 3, characterized in that: The gasket core is semi-conductive rubber.

10. The metal shielded rubber sheathed flexible cable for coal mine frequency conversion device according to claim 2, characterized in that: The braided shielding layer is braided with tinned copper wires.

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