A stain-resistant digital communication cable and a manufacturing method thereof

Abstract

The application discloses a kind of dirt-resistant digital communication cable, including the inner sheath that several wire pairs signal lines are wrapped inside, the outer circumferential surface of inner sheath is provided with flexible reinforcing cover layer, the inner circumferential surface of flexible reinforcing cover layer is provided with several arch parts, the arch opening of arch part is towards the side away from inner sheath, and several arch parts are equally spaced about the axis of inner sheath in annular direction, and the outer circumferential surface of flexible reinforcing cover layer is provided with outer sheath. By adopting the above setting, the sheath of cable can be reinforced, and the cracking caused by extrusion with hard objects under ultra-low temperature and oil pollution environment can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable structure, and particularly relates to a dirt-resistant digital communication cable and a manufacturing method thereof. BACKGROUND

[0002] The digital communication cable is widely applied to the Internet, the telecommunication network, the radio and television network and various special networks. When the general cable is applied to the ultra-low temperature environment, the cable protection layer will be rapidly hardened and embrittled, so that the bending stress of the cable is increased, and the sheath is prone to cracking. Meanwhile, in the oil pollution environment, the mechanical property of the cable is rapidly deteriorated, and the sheath is also prone to cracking.

[0003] In view of the above problems, the prior art usually selects a new material with ultra-low temperature resistance and oil pollution resistance as the sheath of the cable, so as to reduce the cracking damage of the sheath of the cable. However, in the actual ultra-low temperature and oil pollution environment, the sheath of the cable is also subjected to a low degree of hardening and embrittlement. When the cable is buried in the soil under the ground, and due to the external force, the hard sand and stones in the soil are pressed against the sheath on the surface of the cable, which may cause the sheath to crack and reduce the service life. SUMMARY

[0004] In order to overcome the defects of the prior art, the purpose of the present application is to provide a dirt-resistant digital communication cable and a manufacturing method thereof, which can reinforce the sheath of the cable and reduce the cracking caused by the pressing of the hard objects in the ultra-low temperature and oil pollution environment.

[0005] The purpose of the present application is achieved by the following technical solutions.

[0006] A dirt-resistant digital communication cable comprises an inner sheath in which a plurality of wire pair signal lines are wrapped, a flexible reinforcing sleeve layer is arranged on the outer circumferential surface of the inner sheath, a plurality of arch-shaped portions are arranged on the inner circumferential surface of the flexible reinforcing sleeve layer, the arch-shaped openings of the arch-shaped portions are directed away from the inner sheath, the plurality of arch-shaped portions are equally spaced in the annular direction about the axis of the inner sheath, and an outer sheath is sleeved on the outer circumferential surface of the flexible reinforcing sleeve layer.

[0007] Further, the flexible reinforcing sleeve layer comprises a plurality of splicing strips, the length direction of the splicing strips is consistent with the length direction of the inner sheath, the plurality of splicing strips are equally angularly distributed in the annular direction about the axis of the inner sheath, the splicing strip comprises a plurality of arch-shaped unit blocks, the arch-shaped unit blocks are made of a thin metal material, the plurality of arch-shaped unit blocks are arranged in the length direction of the splicing strip, the adjacent arch-shaped unit blocks of the same splicing strip are abutted, and the arch-shaped openings of the plurality of arch-shaped unit blocks of the same splicing strip are directed in the same direction to form the arch-shaped portion.

[0008] Further, the arc-shaped units of the same splicing strip are arranged in alignment along the length direction of the splicing strip, the arc-shaped opening edges of adjacent splicing strips are close to each other, and the same connecting bayonet strip is detachably connected between the adjacent splicing strips. The connecting bayonet strip is made of rubber material, a matching groove is formed in the side surface of the connecting bayonet strip along the length direction, the connecting bayonet strip is inserted into the arc-shaped opening edges of the adjacent splicing strips through the matching groove, and the inner wall of the matching groove is in abutment with the inner wall of the arc-shaped opening of the splicing strip. The inner circumferential surface of the outer sheath is in abutment with the connecting bayonet strip.

[0009] Further, there is a gap between the adjacent splicing strips, the inner bottom surface of the matching groove of the connecting bayonet strip is protruded with a matching strip, and the length direction of the matching strip is consistent with the length direction of the connecting bayonet strip; when the connecting bayonet strip is inserted into the arc-shaped opening edges of the adjacent splicing strips through the matching groove, the matching strip is inserted into the gap between the adjacent splicing strips.

[0010] Further, the arc-shaped unit blocks of the adjacent splicing strips are arranged in misalignment.

[0011] Further, the outer circumferential surface of the flexible reinforcing sleeve layer is sleeved with a flexible metal mesh sleeve layer, and the flexible metal mesh sleeve layer is in abutment with the inner circumferential surface of the outer sheath.

[0012] Further, the signal line comprises a plurality of twisted conductive wires, the conductive wires are in abutment, and the conductive wires are sleeved with the same insulating sleeve.

[0013] Further, the insulating sleeve is filled with a plurality of air bubbles.

[0014] Further, the two signal lines of the same wire pair are sleeved with the same cladding sleeve layer, and the length direction of the cladding sleeve layer is consistent with the length direction of the signal line.

[0015] Further, the inner sheath is filled with a flexible filling body, and the flexible filling body wraps a plurality of cladding sleeve layers.

[0016] A manufacturing method of a stain-resistant digital communication cable, comprising the following steps:

[0017] Signal line processing and installation: a plurality of conductive wires are twisted into a bundle by spiral twisting, the bundle of conductive wires is placed on the surface to form a sheet-shaped insulating layer filled with air bubbles, and then the excess insulating layer material on the surface is cut off by a cutting machine and then enters an extruder, and a signal line is formed by rotating and pushing the screw of the extruder.

[0018] The wire pair signal line processing installation: the sheath layer one end is put into and is set in the expansion sleeve of the sleeve machine, then one wire pair signal line is put into the expansion sleeve inside sleeve machine, then under the advancing effect of the advancing mechanism, the sheath layer and one wire pair signal line are advanced along the same direction, the sheath layer is shrunk and set on the surface of the wire pair signal line at the end of the expansion sleeve along the advancing direction of the advancing mechanism;

[0019] The inner sheath processing installation: the signal line of several wire pairs with sheath layer is externally added with flexible filling body, after preliminary forming by sleeve machine, the inner sheath in sheet shape is placed on the surface, then the excess outer sheath material on the surface is cut off by cutting machine and then enters the extruder, after the rotation and extrusion of the screw of the extruder, the inner sheath is tubularly set on the signal line of multiple wire pairs, and the inside is filled through the flexible filling body;

[0020] Flexible reinforcing sheath layer processing installation: multiple splicing strips are arranged on the surface of the inner sheath with multiple wire pair signal lines along the annular direction and at equal intervals, then the connecting bayonet strip is inserted and connected at the mutually close arched opening edge of adjacent splicing strips, at the same time, the gap between the cooperating strip of the connecting bayonet strip and the adjacent splicing strip is inserted, so that multiple splicing strips are connected into a tube and are set on the surface of the inner sheath;

[0021] Outer sheath processing installation: then the flexible reinforcing sheath layer surface with the inner sheath is put into the expansion sleeve of the sleeve machine, then one end of the outer sheath is put into and set in the expansion sleeve of the sleeve machine, then under the advancing effect of the advancing mechanism, the outer sheath and the tubular flexible reinforcing sheath layer are advanced along the same direction, the outer sheath is shrunk and set on the surface of the flexible reinforcing sheath layer at the end of the expansion sleeve along the advancing direction of the advancing mechanism, thereby completing the processing and manufacturing of the cable operation.

[0022] The present application has the following beneficial effects:

[0023] 1. A kind of dirt-resistant digital communication cable, it is aimed at the sheath of cable and is reinforced, reduce its in super low temperature and oil pollution environment, with hard (especially more hard sandstone under ground) extrusion and appear cracking. Therefore by setting flexible reinforcing jacket layer on the outer surface of inner sheath, the surface of inner sheath is reinforced to reduce cracking, specifically by setting several arch-shaped parts on the surface of flexible reinforcing jacket layer, to wrap the outer surface of inner sheath, and the arch-shaped opening of arch-shaped part is towards the side away from inner sheath, and the arch-shaped structure has good compression resistance, so that the surface of inner sheath has outward compression structural stress. Therefore, when the surface of cable is extruded by hard or strong extrusion, the compression stress of arch-shaped part of flexible reinforcing jacket layer can be used, so as to reduce the local extrusion force of hard to inner sheath, and because the side away from the arch-shaped opening of arch-shaped part is arc surface, the surface of inner sheath is abutted by the arc surface, so as to reduce the cracking and damage of inner sheath caused by too sharp contact surface.

[0024] 2. A kind of dirt-resistant digital communication cable manufacturing method, mainly by signal line processing installation, wire pair signal line processing installation, inner sheath processing installation, flexible reinforcing jacket layer processing installation, outer sheath processing installation, these five steps are composed of, wherein signal line processing installation step is used to realize the processing of signal line forming;Wire pair signal line processing installation step can realize the covering jacket layer is set on the surface of a wire pair signal line;Inner sheath processing installation step can realize that inner sheath is wrapped and set on the surface of multiple wire pair signal lines, and the filling of flexible filler is realized;Flexible reinforcing jacket layer processing installation step can realize that flexible reinforcing jacket layer is set on the surface of inner sheath, and flexible metal mesh jacket layer is set outside, so as to realize the reinforcing effect;Outer sheath processing installation step can realize that outer sheath is wrapped and set on the surface of flexible metal mesh jacket layer. Thus realize complete manufacturing process, and make the development and manufacture of the present application have traceable. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the overall structure diagram of the present application.

[0026] Figure 2 It is the overall structure sectional view of the present application.

[0027] Figure 3 It is the overall structure explosion drawing of the present application.

[0028] Figure 4 It is Figure 3 The local enlarged view of A in the middle.

[0029] Figure 5 It is the installation state diagram of splice block and connecting opening strip of the present application.

[0030] Figure 6 For Figure 5 A local enlarged view at B in the middle.

[0031] In the figure: 1, outer sheath; 2, flexible metal jacket layer; 3, flexible reinforcing jacket layer; 31, splicing strip; 311, planar strip; 32, arched unit block; 321, convex strip; 33, connecting bayonet strip; 34, matching groove; 35, matching strip; 36, gap; 4, inner sheath; 5, flexible filler; 6, cladding jacket layer; 7, insulation layer; 71, air bubble; 8, wire. DETAILED DESCRIPTION

[0032] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments. The terms such as "upper", "inner", "middle", "left", "right" and "one" used in this specification are only for the convenience of clear description, and are not intended to limit the scope of the application. Changes or adjustments of the relative relationship without substantial changes in technical content are also considered as the scope of the application.

[0033] Referring to Figures 1 to 6 The figure shows a kind of dirt-resistant digital communication cable, including the inner sheath 4 wrapped with several wire pairs signal lines, wherein two signals of each wire pair are respectively used for sending signal or receiving signal; the outer periphery of inner sheath 4 is provided with flexible reinforcing jacket layer 3, the inner periphery of flexible reinforcing jacket layer 3 is provided with several arched parts, the arched opening of arched part is towards the side away from inner sheath 4, and several arched parts are distributed along the annular direction equidistantly about the axis of inner sheath 4, the outer periphery of flexible reinforcing jacket layer 3 is wrapped with outer sheath 1, which is used to wrap flexible reinforcing jacket layer 3, so as to reduce the surface separation of the flexible reinforcing jacket layer 3 and inner sheath 4, and then improve the installation stability of flexible reinforcing jacket layer 3.

[0034] Specifically, the present application aims to reinforce the sheath of the cable, reduce the cracking caused by extrusion with hard objects (especially relatively hard sandstone under the ground) in the ultra-low temperature and oil pollution environment. Therefore, by arranging the flexible reinforcing sleeve layer 3 on the outer surface of the inner sheath 4, the surface of the inner sheath 4 is reinforced to reduce cracking, specifically by arranging a plurality of arch-shaped parts on the surface of the flexible reinforcing sleeve layer 3 to wrap the outer surface of the inner sheath 4, and the arch-shaped opening of the arch-shaped part faces away from the inner sheath 4, and the arch-shaped structure has good compression resistance. Therefore, when the surface of the cable is extruded or strongly extruded by hard objects, the arch-shaped part of the flexible reinforcing sleeve layer 3 can be used to resist the stress, thereby reducing the local extrusion force of the hard objects on the inner sheath 4. At the same time, since the side of the arch-shaped part away from the arch-shaped opening is an arc surface, the arc surface is in contact with the surface of the inner sheath 4, thereby reducing the cracking and damage of the inner sheath 4 caused by the sharp contact surface.

[0035] Referring to Figures 1 to 6 As shown, the flexible reinforcing sleeve layer 3 and its arch-shaped part structure are disclosed to provide compression resistance to the surface of the inner sheath 4, while not reducing the flexibility of the overall cable structure of the present application. The flexible reinforcing sleeve layer 3 includes a plurality of splicing strips 31, the length direction of the splicing strip 31 is consistent with the length direction of the inner sheath 4, and the length of the splicing strip 31 is greater than or equal to the length of the cable of the present application. A plurality of splicing strips 31 are equally distributed in the annular direction about the axis of the inner sheath 4, and the splicing strip 31 includes a plurality of arch-shaped unit blocks 32, which are made of thin metal materials, specifically steel materials, aluminum alloy materials, manganese alloy materials, etc. A plurality of arch-shaped unit blocks 32 are arranged along the length direction of the splicing strip 31, and adjacent arch-shaped unit blocks 32 of the same splicing strip 31 are in contact, the cross section of the arch-shaped unit block 32 is in the shape of an arch, and the arch-shaped openings of a plurality of arch-shaped unit blocks 32 of the same splicing strip 31 face the same direction to form an arch-shaped part.

[0036] Specifically, by arranging a plurality of arched unit blocks 32 in the same length direction and abutting each other, a splicing strip 31 is arranged on the outer circumferential surface of the inner sheath 4. Since the arched unit blocks 32 are made of metal material and the arched units are thin, the arched unit blocks and the splicing strip 31 as a whole have elasticity in the direction of the arched opening, so as to further improve the compression buffering effect of the surface of the inner sheath 4. Therefore, when the cable structure of the present application is locally extruded or even strongly extruded by a hard object, the compression resistance and elastic buffering capacity of the flexible reinforcing sleeve layer 3 can be utilized to reduce the local extrusion impact of the hard object, thereby reducing the cracking or even damage of the surface of the inner sheath 4. At the same time, since the splicing strip 31 is composed of a plurality of abutting arched unit blocks 32, when the cable of the present application is bent, the adjacent arched unit blocks 32 in the splicing strip 31 corresponding to the bending position of the cable will automatically adapt to the change in angle, thereby realizing the function of not reducing the bending flexibility of the inner sheath 4 and the outer sheath 1 in the cable.

[0037] It is worth noting that the arched unit blocks 32 of adjacent splicing strips 31 are arranged in a staggered manner. This arrangement is mainly considered when the arched unit blocks 32 of adjacent splicing strips 31 are in alignment, and when the cable is bent, the adjacent arched unit blocks 32 in the splicing strip 31 corresponding to the bending position of the cable will adapt to the change in angle, thereby causing the flexible reinforcing sleeve layer 3 to have a local defect in the bending position, resulting in a lack of local surface reinforcement. Therefore, by arranging the arched unit blocks 32 of adjacent splicing strips 31 in a staggered manner, the arched unit blocks 32 of adjacent splicing strips 31 can compensate for the lack of reinforcement caused by the adjustment of the angle of the adjacent arched unit blocks 32 in another adjacent splicing strip 31. In this way, the flexible reinforcing sleeve layer 3 of the present application can not only realize the function of not reducing the flexibility of the outer sheath 1 and the inner sheath 4 of the cable, but also realize the function of overall reinforcement of the surface of the inner sheath 4.

[0038] In order to reduce the connection stability between the plurality of splicing strips 31 of the flexible reinforcing sleeve layer 3. The plurality of arch-shaped units of the same splicing strip 31 are arranged in alignment with each other along the length direction of the splicing strip 31, the arch-shaped opening edges of the adjacent splicing strips 31 are close to each other, and the same connecting bayonet strip 33 is detachably connected between the adjacent splicing strips 31. The connecting bayonet strip 33 is made of rubber material, so as to adapt to the bending flexibility of the inner sheath 4 and the outer sheath 1 of the cable. The side surface of the connecting bayonet strip 33 is provided with a matching groove 34 along the length direction, the connecting bayonet strip 33 is inserted into the close arch-shaped opening edges of the adjacent splicing strips 31 through the matching groove 34, and the inner wall of the matching groove 34 abuts against the inner wall of the arch-shaped opening of the splicing strip 31. The inner circumferential surface of the outer sheath 1 abuts against the connecting bayonet strip 33. Thus, by inserting the same connecting bayonet strip 33 into the close arch-shaped opening edges of the adjacent splicing strips 31, the plurality of splicing strips 31 on the surface of the flexible reinforcing sleeve layer 3 are connected through the connecting bayonet strip 33 installed between the adjacent splicing strips 31, so as to realize the beneficial effect of improving the overall structural stability.

[0039] Referring to Figures 1 to 6 As shown in the figure, in order to further improve the stability of the connecting bayonet strip 33 inserted into the arch-shaped opening position between the adjacent splicing strips 31, so as to reduce the situation that the connecting bayonet strip 33 is separated from the adjacent splicing strips 31. There is a gap 36 between the adjacent splicing strips 31, the inner bottom surface of the matching groove 34 of the connecting bayonet strip 33 is provided with a matching strip 35, the length direction of the matching strip 35 is consistent with the length direction of the connecting bayonet strip 33; when the connecting bayonet strip 33 is inserted into the close arch-shaped opening edges of the adjacent splicing strips 31 through the matching groove 34, the matching strip 35 is inserted into the gap 36 between the adjacent splicing strips 31. Thus, by integrally connecting the matching strip 35 on the inner bottom surface of the matching groove 34 of the connecting bayonet strip 33, the gap 36 between the two adjacent splicing strips 31 is inserted at the same time during the process of inserting the connecting bayonet strip 33 into the close arch-shaped opening edges of the two adjacent splicing strips 31 through the matching strip 35, so as to realize the effect of further improving the installation stability.

[0040] Meanwhile, the two open edges of the arched unit block 32 are provided with protrusions 321, the length direction of the protrusions 321 is consistent with the length direction of the splicing strip 31, the planes of the two protrusions 321 of the same arched unit block 32 are parallel, and the protrusions 321 near the same arched open edge of the same splicing strip 31 are aligned to form a plane strip 311. When the matching slot 34 of the connecting socket strip 33 is inserted into the gap 36 between the two plane strips 311 of the adjacent splicing strip 31, the inner wall of the matching slot 34 is in contact with the side of the protrusion 321 near the arched opening, and the matching strip 35 is in contact with the opposite plane of the two plane strips 311.

[0041] Specifically, the protrusions 321 are arranged on the two open edges of the arched unit block 32, so that the arched open edges of the same splicing strip 31 form a plane strip 311. The plane strip 311 is arranged mainly to increase the contact area during the installation of the connecting socket strip 33 and the matching strip 35, thereby improving the installation stability. Compared with the original splicing strip 31 with an arched cross section, the gap 36 between the adjacent splicing strips 31 is small, and the matching strip 35 can only contact the open edge of the splicing strip 31, which reduces the contact area and increases the connection stability. Therefore, the protrusions 321 and the plane strip 311 are arranged to increase the contact area during the installation of the matching strip 35, thereby improving the installation stability.

[0042] In order to further improve the structural stability of the flexible reinforcing sleeve layer 3 composed of a plurality of splicing strips 31, and reduce the separation of the splicing strips 31 and the inner sheath 4. The flexible reinforcing sleeve layer 3 is provided with a flexible metal mesh sleeve layer, which is composed of a plurality of copper wires and has a multi-layer mesh structure. The flexible metal mesh sleeve layer has good structural rigidity and flexibility, and is in contact with the inner periphery of the outer sheath 1. The flexible metal mesh sleeve layer is wrapped around the flexible reinforcing sleeve layer 3 and is in contact with the inner periphery of the outer sheath 1, thereby reinforcing the inner surface of the outer sheath 1 and reducing the separation of the splicing strips 31 of the flexible reinforcing sleeve layer 3 when the outer sheath 1 cracks, thereby improving the structural stability of the flexible reinforcing sleeve layer 3.

[0043] Referring to Figures 1 to 6As shown, in order to disclose the structure of the signal line. The signal line comprises seven twisted conductors 8, seven conductors 8 are bundled, and the same insulating sleeve is wrapped outside the seven conductors 8. The insulating layer 7 is used to reduce the interference of the internal bundled conductors 8 by the external adjacent conductors 8. At the same time, the inside of the insulating sleeve is filled with several bubbles 71. By filling the dense bubbles 71 inside the insulating layer 7, on the one hand, in order to improve the insulation effect of the insulating layer 7, on the other hand, in order to improve the flexible buffering effect of the insulating layer 7, so that the signal line as a whole has better flexibility.

[0044] In order to distinguish the signal lines belonging to the same pair of lines, the same pair of lines is provided with the same covering sleeve layer 6, and the length direction of the covering sleeve layer 6 is consistent with the length direction of the signal line. At the same time, the inner sheath 4 is filled with a flexible filler 5, which can be cotton, insulating mud, flexible plastic, etc. The flexible filler 5 wraps several covering sleeve layers 6, thereby reducing the mutual movement of the signal lines in the inner sheath 4.

[0045] Based on the above description of the cable structure of the present application, the manufacturing method of the cable structure is further described as follows:

[0046] A manufacturing method of a stain-resistant digital communication cable, comprising signal line processing and installation, line pair signal line processing and installation, inner sheath 4 processing and installation, flexible reinforcing sleeve layer 3 processing and installation, and outer sheath 1 processing and installation. The five steps are as follows:

[0047] Signal line processing and installation: several conductors 8 are spirally twisted into a bundle by existing twisting equipment, and the bundle of conductors 8 is placed on the surface of the insulating layer 7 (the bubbles 71 inside the insulating layer 7 are mainly due to the foaming effect of the material of the insulating layer 7 during processing, so that the insulating layer 7 has bubbles 71 after preparation, and the bubbles 71 are required for the insulating layer 7 of the present application, and have better beneficial effects) which is sheet-shaped and internally filled with bubbles 71. After cutting off the excess insulating layer 7 material on the surface by a cutting machine, it enters the extruder, and the signal line is formed by rotating and pushing the screw of the extruder.

[0048] Line pair signal line processing and installation: one end of the covering sleeve layer 6 is placed in and wrapped around the expansion sleeve of the existing sleeve machine, then one pair of signal lines is placed inside the expansion sleeve of the sleeve machine, and then the covering sleeve layer 6 and the signal line of one pair of lines are pushed in the same direction under the pushing action of the pushing mechanism. At the end of the expansion sleeve in the pushing direction of the pushing mechanism, the covering sleeve layer 6 is wrapped and set on the surface of the line pair signal line.

[0049] Inner sheath 4 processing installation: a number of wire pairs with signal lines with cladding layer 6 outside the addition of flexible filler 5, after the sleeve machine preliminary forming, on its surface placed into sheet-shaped inner sheath 4, then through cutting machine cut off the surface of the excess outer sheath 1 material after entering the extruder, using the screw rotation of extruder push, make the inner sheath 4 into tubular set of multiple wire pairs of signal lines, and the inside through the flexible filler 5 filling.

[0050] Flexible reinforcing sleeve layer 3 processing installation: in the above with multiple wire pairs of signal lines of the inner sheath 4 surface along the annular direction and equidistantly arranged multiple splicing strip 31, then in the adjacent splicing strip 31 of the mutual close arch-shaped opening edge out of the bayonet strip 33, at the same time make the connection of the bayonet strip 33 of the cooperation strip 35 and the gap 36 between the adjacent splicing strip 31 insert, so that the several splicing strip 31 is connected into tubular and set on the surface of the inner sheath 4, after the flexible reinforcing sleeve layer 3 surface set flexible metal mesh sleeve layer.

[0051] Special note, in this step, workers can be placed in the form of manual or mechanical hand with the help of special tooling fixture, multiple arch unit block 32 along the annular direction is placed in the tubular tooling fixture, and during the placement process, need to pay special attention to the adjacent arch unit block 32 is placed in the wrong position along the annular direction, then along the pipe length direction of the tooling fixture in turn placed a ring of arch unit block 32, then in another for placing the connection of the bayonet strip 33 of the special tooling fixture along the annular direction equiangularly placed the corresponding number of connection of the bayonet strip 33; at the same time make the tooling fixture for placing the arch unit block 32 of the pipe and the tooling fixture for placing the connection of the bayonet strip 33 of the pipe opposite, and then push the multiple arch unit block 32 placed in the tooling fixture for placing the arch unit block 32 into the pipe of the tooling fixture for placing the connection of the bayonet strip 33, so that the connection of the bayonet strip 33 and the arch unit block 32 placed in the tooling fixture for placing the arch unit block 32 through the arch unit block 32 form splicing strip 31 connected, so as to form flexible processing sleeve layer; then the inner sheath 4 processing installation step formed with multiple wire pairs of signal lines of the inner sheath 4 is inserted into the above flexible processing sleeve layer, so that the several splicing strip 31 is connected into tubular and set on the surface of the inner sheath 4.

[0052] Outer sheath 1 processing installation: then the above with the inner sheath 4 of the flexible reinforcing sleeve layer 3 surface is put into the expansion sleeve of the sleeve machine, then the outer sheath 1 one end is put into and set on the expansion sleeve of the sleeve machine, then under the pushing action of the advancing mechanism, while driving the outer sheath 1 and the tubular flexible reinforcing sleeve layer 3 in the same direction, at the end of the expansion sleeve along the advancing mechanism advancing direction, the outer sheath 1 is set and adhered to the surface of the flexible reinforcing sleeve layer 3, thus completing the processing and manufacturing of the cable operation.

[0053] Specifically, the manufacturing method of the anti-pollution digital communication cable mainly comprises the following five steps: signal line processing and installation, wire pair signal line processing and installation, inner sheath 4 processing and installation, flexible reinforcing sleeve layer 3 processing and installation, and outer sheath 1 processing and installation. The signal line processing and installation step is used to realize the processing and forming of the signal line; the wire pair signal line processing and installation step can realize the sleeving of the covering sleeve layer 6 on the surface of a wire pair; the inner sheath 4 processing and installation step can realize the sleeving of the inner sheath 4 on the surface of the signal lines of multiple wire pairs, and realize the filling of the flexible filler 5; the flexible reinforcing sleeve layer 3 processing and installation step can realize the sleeving of the flexible reinforcing sleeve layer 3 on the surface of the inner sheath 4, and the sleeving of the flexible metal mesh sleeve layer outside the flexible reinforcing sleeve layer 3, so as to realize the reinforcing effect; and the outer sheath 1 processing and installation step can realize the sleeving of the outer sheath 1 on the surface of the flexible metal mesh sleeve layer. Thus, the complete manufacturing process is realized, and the research and development of the present application can be traced.

[0054] The embodiments of the present application are not limited to this, and according to the above content of the present application, using the ordinary technical knowledge and means in the art, other various forms of modifications, replacements or combinations can be made without departing from the above basic technical idea of the present application, which all fall within the protection scope of the present application.

Claims

1. A pollution-resistant digital communication cable, characterized in that: The device includes an inner sheath containing several pairs of signal lines, a flexible reinforcing sleeve on the outer circumferential surface of the inner sheath, a number of arched portions on the inner circumferential surface of the flexible reinforcing sleeve, the arched openings of the arched portions facing away from the inner sheath, and the number of arched portions being equally spaced along the circumferential direction about the axis of the inner sheath, and an outer sheath covering the outer circumferential surface of the flexible reinforcing sleeve. The flexible reinforcing sleeve includes several splicing strips, the length direction of which is consistent with the length direction of the inner sheath, and the several splicing strips are distributed at equal angles along the circumferential direction about the axis of the inner sheath. Each splicing strip includes several arched unit blocks, which are made of thin metal material. The several arched unit blocks are arranged along the length direction of the splicing strip, and adjacent arched unit blocks of the same splicing strip abut against each other. The arched openings of the several arched unit blocks of the same splicing strip face the same direction to form the arched portion. Several arched unit blocks of adjacent splicing strips are staggered to each other so that the arched unit blocks of adjacent splicing strips can compensate for the reinforcement loss of adjacent arched unit blocks in another adjacent splicing strip due to angle adjustment; Several arched units of the same splicing strip are aligned with each other along the length of the splicing strip. The edges of the arched openings of adjacent splicing strips are close to each other. The same connecting snap-fit ​​strip is detachably connected between adjacent splicing strips. The connecting snap-fit ​​strip is made of rubber material. The side of the connecting snap-fit ​​strip has a mating groove along the length direction. The connecting snap-fit ​​strip is inserted into the edges of the close-to-each-adjacent arched openings of adjacent splicing strips through the mating groove. The inner wall of the mating groove abuts against the inner wall of the arched opening of the splicing strip. The inner circumferential surface of the outer sheath abuts against the connecting snap-fit ​​strip.

2. The pollution-resistant digital communication cable as described in claim 1, characterized in that: There is a gap between adjacent splicing strips, and a mating strip protrudes from the bottom surface of the mating groove of the connecting snap strip. The length direction of the mating strip is consistent with the length direction of the connecting snap strip. When the connecting snap strip is inserted into the adjacent arched opening edge of the adjacent splicing strip through the mating groove, the gap between the mating strip and the adjacent splicing strip is filled.

3. The pollution-resistant digital communication cable as described in claim 1, characterized in that: A flexible metal mesh sleeve is fitted on the outer peripheral surface of the flexible reinforcing sleeve, and the flexible metal mesh sleeve abuts against the inner peripheral surface of the outer sheath.

4. The pollution-resistant digital communication cable as described in claim 1, characterized in that: The signal line comprises several stranded wires that abut against each other and are covered with the same insulating sleeve.

5. A pollution-resistant digital communication cable as described in claim 4, characterized in that: The interior of the insulating sleeve is filled with several air bubbles.

6. The pollution-resistant digital communication cable as described in claim 1, characterized in that: The two signal lines of the same pair are covered with the same sheath, and the length direction of the sheath is consistent with the length direction of the signal line.

7. A pollution-resistant digital communication cable as described in claim 6, characterized in that: The inner sheath is filled with a flexible filler, which encapsulates several of the covering layers.

8. A method for manufacturing a pollution-resistant digital communication cable as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Signal line processing and installation: Several wires are twisted into a bundle by spiral twisting. An insulating layer with sheet-like structure and air bubbles is placed on the surface of the bundle of wires. After the excess insulating layer material is cut off by a cutting machine, the wires are fed into an extruder. The screw of the extruder rotates and pushes the wires to form a signal line. Processing and installation of wire pair signal lines: Place one end of the sheathing layer onto the expansion sleeve of the sleeve machine, then place the wire pair signal line into the expansion sleeve of the sleeve machine, and then, under the pushing action of the pushing mechanism, simultaneously drive the sheathing layer and the wire pair signal line to move in the same direction. At the end of the expansion sleeve along the pushing direction of the pushing mechanism, the sheathing layer shrinks and fits onto the surface of the wire pair signal line. Inner sheath processing and installation: Flexible filler is added to the outside of several pairs of signal lines with sheaths. After preliminary forming by a sleeving machine, a sheet-like inner sheath is placed on its surface. Then, the excess outer sheath material is cut off by a cutting machine and the sheath enters the extruder. The screw of the extruder rotates and pushes the inner sheath to form a tubular sleeve around the signal lines of multiple pairs, and the inside is filled with flexible filler. Flexible reinforced sleeve processing and installation: Multiple splicing strips are set along the annular direction and at equal intervals on the surface of the inner sheath with multiple signal pairs. Then, a connecting bayonet strip is inserted into the arched opening edge of the adjacent splicing strips. At the same time, the gap between the connecting bayonet strip and the adjacent splicing strip is inserted, so that several splicing strips are connected into a tube and sleeved on the surface of the inner sheath. Outer sheath processing and installation: Next, the surface of the flexible reinforcing sleeve with the inner sheath is placed inside the expansion sleeve of the sleeve machine. Then, one end of the outer sheath is placed and fitted onto the expansion sleeve of the sleeve machine. Under the pushing action of the pushing mechanism, the outer sheath and the tubular flexible reinforcing sleeve are simultaneously pushed forward in the same direction. At the end of the expansion sleeve along the pushing direction of the pushing mechanism, the outer sheath contracts and fits onto the surface of the flexible reinforcing sleeve, thereby completing the cable processing and manufacturing operation.

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