A mobile metal shielded monitoring rubber sheathed flexible cable for coal mines

Abstract

The present invention discloses a mobile metal shield monitoring type rubber sheathed flexible cable for coal mines, which relates to the field of cable technology, including a cable core and an inner sheath, a monitoring layer, a reinforcement layer, an outer sheath layer, an anti-twist mark color strip and a permanent concave-convex pressed mark arranged on the outside of the cable core in sequence; the outer sheath layer, the anti-twist mark color strip and the permanent concave-convex pressed mark adopt a one-time molding process; the reinforcement layer includes a reinforcing belt formed on the outside of the monitoring layer in a spiral wrapping manner to form a columnar spiral structure, and a plurality of protrusions are evenly formed on the spiral edge of the columnar spiral structure, and the protrusions are formed by continuous bending of the reinforcing belt in the radial direction of the columnar spiral structure. The anti-twist mark color strip manufactured by the present invention is embedded in the surface of the outer sheath layer, and the anti-twist mark color strip can be integrated with the cable. During use, the anti-twist mark color strip will not disappear due to wear and frequent twisting, so as to facilitate subsequent cable maintenance and recycling.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a mobile metal shielded monitoring type rubber sheathed flexible cable for coal mines. Background Art

[0002] The general method of laying cables underground in coal mining machinery is to coil the cables into a mine car, transport them to the laying site by the mine car, and then lay them by manual dragging. Since the cross-section of mobile metal shielded monitoring rubber-sheathed soft cables used in coal mines is generally large (95mm2 and above), the cables are heavy and easy to twist during laying. Since the cables are round, they are affected by the light underground and the lack of reference objects. It is not easy to be found when the cables are twisted, and the twisting of the cables will seriously shorten their service life.

[0003] The existing cable markings for coal mines are all printed with ink jet coding, which is not resistant to abrasion. The cable surface is easily contaminated by coal dust. The cable markings are easily wiped off after wiping, making them difficult to distinguish, causing great inconvenience to subsequent cable maintenance and recycling. At the same time, since the cables are used in coal mines, they are easily impacted by falling rocks during use, which can easily lead to the breakage of the internal conductor of the cable. Summary of the invention

[0004] The object of the present invention is to provide a mobile metal shielded monitoring type rubber sheathed flexible cable for coal mines to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides a mobile metal shield monitoring type rubber sheathed flexible cable for coal mines, comprising a cable core and an inner sheath, a monitoring layer, a reinforcement layer, an outer sheath layer, an anti-twist mark color strip and a permanent concave and convex pressed mark arranged on the outside of the cable core in sequence;

[0007] The cable core includes three insulated power cores, two ground cores, one ground detection core and one optical cable, and the outer sheath layer, the anti-twist mark color strip and the permanent concave and convex pressed mark adopt a one-time molding process;

[0008] The reinforcement layer includes a columnar spiral structure formed by a reinforcement belt in a spirally wrapped manner outside the monitoring layer, and a plurality of protrusions are evenly formed on the spiral edge of the columnar spiral structure. The protrusions are formed by continuously bending the reinforcement belt in the radial direction of the columnar spiral structure.

[0009] Furthermore, the reinforcement belt includes a plurality of protrusions and a belt-shaped connecting portion arranged between adjacent protrusions;

[0010] The protrusion includes a first belt-shaped portion, a second belt-shaped portion and a third belt-shaped portion, and the ends of the first belt-shaped portion, the second belt-shaped portion and the third belt-shaped portion are sequentially connected to form an isosceles triangle structure.

[0011] Furthermore, in the spiral edge of the columnar spiral structure, the ends of adjacent strip-shaped connecting portions abut against each other, and there is a gap between adjacent raised second strip-shaped portions.

[0012] Furthermore, the width of the protrusion decreases gradually from the middle to both ends in the height direction, and adjacent spiral edges of the columnar spiral structure abut against each other.

[0013] Furthermore, the optical cable is arranged at the center of the cable core, and three insulated power cores, two ground cores and one ground detection core are twisted on the outside of the optical cable.

[0014] Furthermore, the insulated power core includes a conductor, a conductor shielding layer, an EPDM rubber insulation layer, an insulating non-metallic shielding layer and an insulating metal shielding layer which are arranged in sequence from the inside to the outside.

[0015] Furthermore, the ground detection wire core includes a ground detection wire core conductor and a ground detection wire core insulation layer which are sequentially arranged from the inside to the outside.

[0016] Furthermore, the monitoring layer includes a semiconductive layer, a semiconductive tape sheath, and three monitoring wire core conductors uniformly arranged outside the semiconductive layer and the semiconductive tape sheath in a circumferential direction.

[0017] Furthermore, the manufacturing method of the outer sheath comprises the following steps:

[0018] a. When the outer sheath layer is extruded by a 150-type rubber extruder, a 30-type rubber extruder is used to extrude the anti-twist color strip perpendicular to the cable surface;

[0019] b. In the subsequent process of step a, use a roller press to press the company name, cable model specification, safety mark certificate number, and production date on the outer sheath layer;

[0020] c. Send the cable in step b into a vulcanization pipeline for cross-linking and vulcanization.

[0021] Furthermore, the anti-twist mark color strip has a width of 15±5 mm and a depth of 1.5±0.5 mm.

[0022] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0023] 1. According to the present invention, when falling rocks hit the cable, several protrusions on the spiral edge of the columnar spiral structure can be deformed to achieve the purpose of buffering, thereby reducing the impact of the falling rocks on the cable core and effectively protecting the cable core. Moreover, since the protrusions are formed by continuous bending of the reinforcing belt in the radial direction of the columnar spiral structure, this can not only simplify the manufacturing difficulty of the entire cable (i.e., the forming of the reinforcing layer only requires spirally wrapping the reinforcing belt around the outer side of the inner sheath), but also due to the presence of the protrusions, when the cable is bent, the protrusions on the spiral edge of the columnar spiral structure can be deformed, so that the length of the spiral edge is extended to a certain extent, so as to reduce the resistance of the cable when bending, thereby making the cable have excellent bending performance.

[0024] 2. The anti-twist mark color strip manufactured by the present invention is embedded in the surface of the outer sheath layer, so the anti-twist mark color strip can become one with the cable. During use, the anti-twist mark color strip will not disappear due to wear and frequent twisting, so as to facilitate subsequent cable maintenance and recycling.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the reinforcement layer structure of the present invention;

[0029] Figure 3 is a schematic diagram of the reinforcement belt structure of the present invention;

[0030] Figure 4 yes Figure 2 Schematic diagram of the local structure at A;

[0031] Figure 5 It is a schematic diagram of the end structure of the reinforcement layer of the present invention;

[0032] Figure 6 is a schematic diagram of the front structure of the reinforcement layer of the present invention;

[0033] Figure 7 yes Figure 6 AA structural diagram;

[0034] Figure 8 yes Figure 5 Schematic diagram of the local structure at location B.

[0035] In the figure:

[0036] 1-cable core; 11-insulated power core; 12-ground core; 13-ground detection core; 14-optical cable; 2-inner sheath; 3-monitoring layer; 4-reinforcement layer; 41-columnar spiral structure; 42-protrusion; 421-first strip-shaped portion; 422-second strip-shaped portion; 423-third strip-shaped portion; 43-strip-shaped connecting portion; 44-inner spiral layer; 45-outer spiral layer; 46-spiral reinforcement rib layer; 5-outer sheath layer; 6-anti-twist mark color strip. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] See also Figure 1-Figure 8 The present invention provides a mobile metal shielded monitoring rubber sheathed flexible cable for coal mines, comprising a cable core 1 and an inner sheath 2, a monitoring layer 3, a reinforcement layer 4, an outer sheath layer 5, an anti-twist mark color strip 6 and a permanent concave convex pressed mark which are sequentially arranged outside the cable core 1; the cable core 1 comprises three insulating power cores 11, two ground cores 12, a ground detection core 13 and an optical cable 14, and the outer sheath layer 5, the anti-twist mark color strip 6 and the permanent concave convex pressed mark are formed by a one-time molding process.

[0039] The anti-twist mark color strip 6 manufactured by the present invention is embedded in the surface of the outer sheath layer 5, so the anti-twist mark color strip 6 can be integrated with the cable. During use, the anti-twist mark color strip 6 will not disappear due to wear and frequent twisting, so as to facilitate subsequent cable maintenance and recycling.

[0040] In a specific embodiment of the present invention, the optical cable 14 is arranged at the center of the cable core 1 , and three insulated power cores 11 , two ground cores 12 and one ground detection core 13 are twisted on the outside of the optical cable 14 .

[0041] In a specific embodiment of the present invention, the insulated power core 11 includes a conductor, a conductor shielding layer, an EPDM rubber insulation layer, an insulating non-metallic shielding layer and an insulating metal shielding layer which are sequentially arranged from the inside to the outside.

[0042] In a specific embodiment of the present invention, the ground detection core 13 includes a ground detection core conductor and a ground detection core insulation layer which are sequentially arranged from the inside to the outside.

[0043] In a specific embodiment of the present invention, the monitoring layer 3 includes a semiconductive layer, a semiconductive tape sheath arranged sequentially from the inside to the outside, and three monitoring wire core conductors uniformly arranged outside the semiconductive layer and the semiconductive tape sheath along the circumferential direction.

[0044] like Figure 2 As shown, the reinforcing layer 4 includes a columnar spiral structure 41 formed by a reinforcing belt in a spirally wrapped manner on the outside of the monitoring layer 3, and a plurality of protrusions 42 are evenly formed on the spiral edge of the columnar spiral structure 41. The protrusions 42 are formed by continuously bending the reinforcing belt in the radial direction of the columnar spiral structure 41.

[0045] During use of the present invention, when falling rocks hit the cable, several protrusions 42 on the spiral edge of the columnar spiral structure 41 can be deformed to achieve the purpose of buffering, thereby reducing the impact of the falling rocks on the cable core 1 and effectively protecting the cable core 1. Moreover, since the protrusions 42 are formed by continuously bending the reinforcing belt in the radial direction of the columnar spiral structure 41, this can not only simplify the manufacturing difficulty of the entire cable (that is, the molding of the reinforcing layer 4 only requires spirally wrapping the reinforcing belt around the outer side of the inner sheath 2), but also due to the presence of the protrusions 42, when the cable is bent, the protrusions 42 on the spiral edge of the columnar spiral structure 41 can be deformed, so that the length of the spiral edge is extended to a certain extent, so as to reduce the resistance encountered by the cable when bending, thereby making the cable have excellent bending performance.

[0046] like Figure 3 As shown, in a specific embodiment of the present invention, the reinforcing belt includes a plurality of protrusions 42 and a strip-shaped connecting portion 43 arranged between adjacent protrusions 42; the protrusion 42 includes a first strip-shaped portion 421, a second strip-shaped portion 422 and a third strip-shaped portion 423, and the ends of the first strip-shaped portion 421, the second strip-shaped portion 422 and the third strip-shaped portion 423 are connected in sequence to form an isosceles triangle structure.

[0047] Based on the above design, combined with Figure 3 and Figure 4 As shown, in the columnar spiral structure 41, the second belt-shaped portion 422 abuts against the inner side of the outer sheath layer 5 to form an outer spiral layer 45; the belt-shaped connecting portion 43 abuts against the outer side of the inner arc sleeve to form an inner spiral layer 44, and the first belt-shaped portion 421 and the third belt-shaped portion 423 can form a spiral reinforcement layer 46 between the outer spiral layer 45 and the inner spiral layer 44;

[0048] When falling rocks hit the cable, the outer spiral layer 45, the inner spiral layer 44 and the spiral reinforcement layer 46 can make the spiral edge of the columnar spiral structure 41 form a spatial support structure in the radial direction of the cable, which not only meets the mechanical strength requirements of the cable when it is impacted, but also reduces the overall manufacturing cost and weight of the cable.

[0049] like Figure 5As shown, in a specific embodiment of the present invention, in the columnar spiral structure 41 , the ends of the band-shaped connecting portion 43 abut against each other, and there is a gap between the second band-shaped portions 422 of adjacent protrusions 42 .

[0050] Based on the above design, Figure 4 As shown, the inner spiral layer 44 formed by the belt-shaped connecting portion 43 can form a complete inner spiral as a whole, which can play a supporting role to prevent the columnar spiral structure 41 from deforming inward when impacted, causing the impact force to act on the cable core 1, thereby effectively protecting the cable core 1;

[0051] The outer spiral layer 45 formed by the second band portion 422, combined with Figure 2 , Figure 4 and Figure 5 As shown, the whole can form an outer spiral similar to a "break". When the cable is in use, when a rock falls and hits the cable, the outer spiral layer 45 will move inward (ie, move toward the cable core) due to the impact. During this process, the spiral reinforcement layer 46 will undergo elastic deformation to mitigate the impact force.

[0052] In the above process, since the outer spiral layer 45 is composed of a plurality of second strip-shaped portions 422, as the plurality of second strip-shaped portions 422 continuously move toward the cable core, the gaps between adjacent second strip-shaped portions 422 will continuously decrease, and eventually the ends of adjacent second strip-shaped portions 422 will collide with each other (refer to Figure 8 As shown), at this time, the outer spiral layer 45, the inner spiral layer 44 and the spiral reinforcement layer 46 jointly play a supporting role, preventing the columnar spiral structure 41 from deforming inward, causing impact force to act on the cable core 1, thereby effectively protecting the cable core 1.

[0053] like Figure 6-Figure 7 As shown, in a specific embodiment of the present invention, the width of the protrusion 42 decreases continuously from the middle to the two ends in the height direction. It can be understood that the two side edges of the second band portion 422 and the third band portion 423 of the protrusion 42 are arc-shaped, and the adjacent spiral edges of the columnar spiral structure 41 abut against each other.

[0054] Based on the above design, it can be avoided that the adjacent spiral edges of the columnar spiral structure 41 may pinch the inner sheath 2 and the outer sheath layer 5 when the cable is bent.

[0055] In a specific embodiment of the present invention, the method for manufacturing the outer sheath layer 5 comprises the following steps:

[0056] a. When the outer sheath layer 5 is extruded by a 150-type rubber extruder, a 30-type rubber extruder is used to extrude the anti-twist mark color strip 6 vertically above the cable surface;

[0057] b. In the subsequent process of step a, the company name, cable model specification, safety mark certificate number and production date are pressed on the outer sheath layer 5 by a roller press;

[0058] c. Send the cable in step b into a vulcanization pipeline for cross-linking and vulcanization.

[0059] In a specific embodiment of the present invention, the anti-twist mark color strip 6 has a width of 15±5 mm and a depth of 1.5±0.5 mm.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mobile metal shielded monitoring rubber sheathed flexible cable for coal mines, comprising a cable core and an inner sheath, a monitoring layer, a reinforcement layer, an outer sheath layer, an anti-twist color strip and a permanent concave and convex pressed mark arranged on the outside of the cable core in sequence; It is characterized in that The cable core includes three insulated power cores, two ground cores, one ground detection core and one optical cable, and the outer sheath layer, the anti-twist mark color strip and the permanent concave and convex pressed mark adopt a one-time molding process; The reinforcement layer includes a columnar spiral structure formed by a reinforcement belt in a spiral wrapping manner outside the monitoring layer, and a plurality of protrusions are evenly formed on the spiral edge of the columnar spiral structure, and the protrusions are formed by continuous bending of the reinforcement belt in the radial direction of the columnar spiral structure; The reinforcement belt includes a plurality of protrusions and a belt-shaped connecting portion arranged between adjacent protrusions; The protrusion includes a first band-shaped portion, a second band-shaped portion and a third band-shaped portion, and the ends of the first band-shaped portion, the second band-shaped portion and the third band-shaped portion are sequentially connected to form an isosceles triangle structure; In the spiral edge of the columnar spiral structure, the ends of adjacent strip-shaped connecting parts abut against each other, and there is a gap between adjacent raised second strip-shaped parts.

2. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1 is characterized in that: The width of the protrusion decreases gradually from the middle to the two ends in the height direction, and adjacent spiral edges of the columnar spiral structure abut against each other.

3. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1 is characterized in that: The optical cable is arranged at the center of the cable core, and three insulated power cores, two ground cores and one ground detection core are twisted on the outside of the optical cable.

4. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1 is characterized in that: The insulated power line core comprises a conductor, a conductor shielding layer, an EPDM rubber insulating layer, an insulating non-metallic shielding layer and an insulating metal shielding layer which are arranged in sequence from the inside to the outside.

5. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1 is characterized in that: The ground detection wire core comprises a ground detection wire core conductor and a ground detection wire core insulation layer which are sequentially arranged from the inside to the outside.

6. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1, characterized in that: The monitoring layer comprises a semiconductive layer, a semiconductive tape sheath, and three monitoring wire core conductors which are uniformly arranged outside the semiconductive layer and the semiconductive tape sheath in a circumferential direction.

7. The mobile metal shielded monitoring rubber sheathed flexible cable for coal mine according to claim 1 is characterized in that: The manufacturing method of the outer sheath layer comprises the following steps: a. When the outer sheath layer is extruded by a 150-type rubber extruder, a 30-type rubber extruder is used to extrude the anti-twist color strip perpendicular to the cable surface; b. In the subsequent process of step a, use a roller press to press the company name, cable model specification, safety mark certificate number, and production date on the outer sheath layer; c. Send the cable in step b into a vulcanization pipeline for cross-linking and vulcanization.

8. The mobile metal shielded monitoring type rubber sheathed flexible cable for coal mine according to claim 7, characterized in that: The anti-twist marking color strip has a width of 15±5 mm and a depth of 1.5±0.5 mm.

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