Shielded cable

Abstract

The invention relates to the technical field of cables, in particular to a shielded cable which comprises a cable body and an electric connector installed at the head end of the cable body. The cable sequentially comprises a mounting wire, a wave-proof sleeve and an alkali-free glass fiber sleeve from inside to outside. Polyimide films are respectively wound at the head end and the tail end of the mounting wire, and a first layer of fiber wire is bound on the polyimide films; the polyimide film and the first layer of fiber line are positioned between the mounting line and the wave-proof sleeve; the head end and the tail end of the anti-wave sleeve are respectively sleeved with a first polytetrafluoroethylene tube, the anti-wave sleeve is lapped on the peripheral surfaces of the first polytetrafluoroethylene tubes after being flanged, a second layer of fiber wires is bound at the flanged position of the anti-wave sleeve, and the second layer of fiber wires are wrapped by the alkali-free glass fiber sleeve; and third layers of fiber wires are bound at the head end and the tail end of the alkali-free glass fiber sleeve respectively. And a layered binding mode is adopted, so that the installation wire, the wave-proof sleeve and the alkali-free glass fiber sleeve are effectively prevented from loosening and sliding off, and the stability of the cable is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a shielded cable. Background Art

[0002] Shielded cable is a type of cable that reduces electromagnetic interference by wrapping conductive material around the outside of the conductor. Its main function is to prevent the external electromagnetic environment from interfering with the internal signal of the cable, thereby ensuring the quality and integrity of signal transmission.

[0003] Shielded cables are generally composed of cables and electrical connectors. The cables mainly include installation wires, wave-proof sleeves and alkali-free glass fiber sleeves. When the traditional shielded cable structure is subjected to pulling force, relative sliding between the installation wires, wave-proof sleeves and alkali-free glass fiber sleeves is easy to occur, resulting in reduced reliability of the cable. Therefore, it is necessary to provide a high-reliability shielded cable that can avoid relative sliding between the installation wires, wave-proof sleeves and alkali-free glass fiber sleeves inside the cable. Summary of the invention

[0004] The main purpose of the present invention is to provide a shielded cable, aiming to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention proposes a shielded cable, comprising a cable and an electrical connector installed at the head end of the cable; the cable comprises an installation wire, a wave-proof sleeve and an alkali-free glass fiber sleeve from the inside to the outside in sequence; a polyimide film is wound around the head end and the tail end of the installation wire, and a first layer of fiber wire is tied on the polyimide film; the polyimide film and the first layer of fiber wire are located between the installation wire and the wave-proof sleeve; a first polytetrafluoroethylene tube is respectively sleeved on the head end and the tail end of the wave-proof sleeve, and the wave-proof sleeve is flanged and placed on the outer circumferential surface of the first polytetrafluoroethylene tube, a second layer of fiber wire is tied at the flanged position of the wave-proof sleeve, and the alkali-free glass fiber sleeve wraps the second layer of fiber wire inside; a third layer of fiber wire is respectively tied at the head end and the tail end of the alkali-free glass fiber sleeve.

[0006] Preferably, the first layer of fiber lines, the second layer of fiber lines, and the third layer of fiber lines are all aramid III fiber lines.

[0007] Preferably, the first layer of fiber lines are respectively tied to two ends of the polyimide film.

[0008] Preferably, a copper yarn is arranged inside the head end of the cable, and the copper yarn is overlapped on the tail attachment of the electrical connector in a 360° ring shape.

[0009] Preferably, the copper yarn is hooked in the flange of the wave-breaking sleeve, and the second layer of fiber thread is tied to the copper yarn to tightly bind the flange of the wave-breaking sleeve and the hooked portion of the copper yarn.

[0010] Preferably, a tail clamp is provided at the head end of the cable, the tail clamp is a pair of clamp structures, the tail clamp embraces the outside of the third layer of fiber wire at the head end of the alkali-free glass fiber casing, and the tail clamp is locked by two tail clamp screws and two spring washers.

[0011] Preferably, an annular protrusion is integrally formed on the outer peripheral surface of the shell of the electrical connector, and a stainless steel wire is tied between the annular protrusion and the tail clamp screw.

[0012] Preferably, two wire locking holes which are 90° apart are provided on the annular protrusion, and the stainless steel wire is connected to the wire locking holes.

[0013] Preferably, the stainless steel wire is a multi-strand structure, and the binding method of the stainless steel wire is as follows: the stainless steel wire is cross-wound from the first wire locking hole, and then the stainless steel wire passes through the first tail clamp screw and then passes through the second wire locking hole in one strand, and then cross-wound, and is bent on the second tail clamp screw and then terminated.

[0014] Preferably, a grounding wire is provided at the tail end of the cable, and one end of the grounding wire is clamped between the flange of the wave-proof sleeve and the alkali-free glass fiber sleeve, and is tied tightly by the second layer of fiber wire; the other end of the grounding wire is connected to a wiring plate, and the connecting part between the wiring plate and the grounding wire is sleeved with a second polytetrafluoroethylene tube.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0016] (1) In the present invention, a structure in which multiple layers of fiber wires are used to bind the head and tail ends of the installation line, the wave-breaking sleeve, and the alkali-free glass fiber casing respectively, effectively fixes the relative positions of the installation line, the wave-breaking sleeve, and the alkali-free glass fiber casing to prevent loosening and slipping.

[0017] (2) In the present invention, the ground wire is clamped at the flange of the wave-proof sleeve and is tied tightly by a second layer of fiber wire to avoid the ultra-high temperature resistance of the traditional tin-lead welding method.

[0018] (3) In the present invention, the first polytetrafluoroethylene tube is respectively sleeved at the head and tail ends of the wave-breaking sleeve, and the wave-breaking sleeve is placed on the outer peripheral surface of the first polytetrafluoroethylene tube after being flanged, and then the second layer of fiber line is tied, which effectively prevents the wave-breaking sleeve from loosening and slipping. At the same time, the first polytetrafluoroethylene tube plays a role of a barrier, preventing the metal wire at the end of the wave-breaking sleeve after the flanged edge from penetrating the wave-breaking sleeve and then piercing the installation line, thereby improving reliability.

[0019] (4) In the present invention, the copper yarn is hooked in the flange of the wave-proof sleeve, and the second layer of fiber line is tied to the copper yarn, which is used to tie the flange of the wave-proof sleeve and the hooking part of the copper yarn tightly, and the copper yarn is lapped on the tail attachment of the electrical connector in a 360° ring shape. Through the above structure, a complete shielding of the cable is formed, eliminating the influence on the shielding effect of the cable caused by the uncovered area at the end of the electrical connector and the wave-proof sleeve when installing the ground wire shielding method.

[0020] (5) The shielded cable provided by the present invention has a simple structure, is safe and reliable, and has stable performance. The cable not only has good shielding performance, but also has high temperature resistance, is easy to install, and meets the normal use of electrical equipment. Specifically, it is a high-reliability shielded cable that is resistant to high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 The overall structure diagram of the shielded cable provided by the present invention;

[0023] Figure 2 This is a structural diagram of the head end of the shielded cable provided by the present invention;

[0024] Figure 3 This is a structural diagram of the tail end of the shielded cable provided by the present invention;

[0025] Figure 4 Schematic diagram of the electrical connector being tied by stainless steel wire in the present invention Figure 1 ;

[0026] Figure 5 Schematic diagram of the electrical connector being tied by stainless steel wire in the present invention Figure 2 .

[0027] Explanation of the accompanying symbols: 1. Installation wire; 2. Polyimide film; 3a. First layer of fiber wire; 3b. Second layer of fiber wire; 3c. Third layer of fiber wire; 4. Wave-proof sleeve; 5. First polytetrafluoroethylene tube; 6. Copper yarn; 7. Tail clip; 8. Electrical connector; 8a. Annular protrusion; 9. Alkali-free glass fiber sleeve; 10. Tail clip screw; 11. Stainless steel wire; 12. Grounding wire; 13. Lug; 14. Second polytetrafluoroethylene tube; 15. Spring washer; 100. Cable. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Embodiment 1:

[0032] Combination Figures 1 to 3 As shown, a shielded cable comprises a cable 100 and an electrical connector 8 installed at the head end of the cable 100; the cable 100 comprises, from the inside to the outside, an installation wire 1, a wave-proof sleeve 4 and an alkali-free glass fiber sleeve 9; the installation wire 1 is composed of an insulating layer and a plurality of wire cores inside the insulating layer, each wire core comprises a conductor and an enameled layer outside the conductor, and the conductor is formed by twisting a plurality of silver-plated copper wires; the insulating layer is made of polyimide.

[0033] Combination Figure 2 and Figure 3 As shown, a polyimide film 2 is wound around the head end and the tail end of the installation line 1, and a first layer of fiber line 3a is tied on the polyimide film 2; the polyimide film 2 and the first layer of fiber line 3a are located between the installation line 1 and the wave-proof sleeve 4.

[0034] Furthermore, the first polytetrafluoroethylene tube 5 is respectively sleeved on the head end and the tail end of the wave-proof sleeve 4, and the wave-proof sleeve 4 is flanged and placed on the outer circumference of the first polytetrafluoroethylene tube 5, and the second layer of fiber line 3b is tied at the flanged position of the wave-proof sleeve 4, and the alkali-free glass fiber sleeve 9 wraps the second layer of fiber line 3b. The third layer of fiber line 3c is respectively tied at the head end and the tail end of the alkali-free glass fiber sleeve 9.

[0035] In this embodiment, the first layer of fiber wires 3a, the second layer of fiber wires 3b, and the third layer of fiber wires 3c are all aramid III fiber wires. Aramid III fiber wires have good reflection properties for electromagnetic waves and infrared rays, and can further enhance the electromagnetic shielding effect of the cable. In addition, aramid III fiber has extremely high tensile strength and good high temperature resistance, can maintain stable performance in high temperature environments, and is suitable for cable applications in high temperature environments. Aramid III fiber has a low density and can significantly reduce the weight of the cable. In general, aramid III fiber wires not only provide excellent electromagnetic shielding performance in shielded cables, but also enhance the mechanical strength, high temperature resistance and fire resistance of the cable, while reducing the weight of the cable, improving its flexibility and antistatic properties, so that it can maintain stable performance in a variety of complex environments.

[0036] By adopting the above structure, multiple layers of fiber wires are used to tie the installation line 1, the wave-breaking sleeve 4, and the alkali-free glass fiber sleeve 9 at the head and tail ends, respectively, so as to effectively fix the relative positions of the installation line 1, the wave-breaking sleeve 4, and the alkali-free glass fiber sleeve 9 to prevent loosening and slipping.

[0037] In this embodiment, the polyimide film 2 maintains stable physical properties within a temperature range of -269°C to 400°C and has excellent stability in a high temperature environment. This enables the cable to be used for a long time in a high temperature environment, such as in industrial equipment, aerospace and other high temperature occasions, and the cable will not lose insulation performance or be damaged due to temperature rise.

[0038] Combination Figure 2 and Figure 3 As shown, in order to improve the reliability of the binding of the polyimide film 2 , the first layer of fiber lines 3 a are respectively bound at two ends of the polyimide film 2 .

[0039] In this embodiment, a copper yarn 6 is arranged inside the head end of the cable 100, and the copper yarn 6 is overlapped on the tail attachment of the electrical connector 8 in a 360° ring shape. Figure 2As shown, after the copper yarn 6 is hooked into the flange of the wave-proof sleeve 4, the copper yarn 6 wraps the flange of the wave-proof sleeve 4 inside, and the second layer of fiber wire 3b is tied to the copper yarn 6, which is used to tie the flange of the wave-proof sleeve 4 and the hooking part of the copper yarn 6 tightly, and the wave-proof sleeve 4 and the copper yarn 6 outside the installation line 1 are used as a shielding layer. A grounding wire 12 is arranged at the tail end of the cable 100, and one end of the grounding wire 12 is clamped at the flange of the wave-proof sleeve 4 and tied by the second layer of fiber wire 3b; the other end of the grounding wire 12 is connected to a wiring piece 13, and the grounding wire 12 and the wiring piece 13 are connected by crimping; the connection part of the wiring piece 13 and the grounding wire 12 is sleeved with a second polytetrafluoroethylene tube 14. The grounding wire 12 is made of a silver-plated copper wire core, the insulation protection layer of the grounding wire 12 is made of polytetrafluoroethylene material, and the wiring piece 13 is made of H62-Y copper, and the surface is silver-plated. The head end of the wave-proof sleeve 4 is transitioned with copper yarn 6. The copper yarn 6 as a shielding layer can achieve 360° ring grounding, and cooperate with the grounding wire 12 at the tail end to form a complete shielding of the cable, eliminating the influence of the shielding effect of the cable caused by the uncovered area at the end of the electrical connector 8 and the wave-proof sleeve 4 when installing the grounding wire shielding method, thereby improving the shielding effect of the cable.

[0040] Combination Figure 2 As shown, a tail clamp 7 is provided at the head end of the cable 100 , and the tail clamp 7 is a pair of clamp structures. The tail clamp 7 embraces the outside of the third layer of fiber line 3c at the head end of the alkali-free glass fiber sleeve 9 , and the tail clamp 7 is locked by two tail clamp screws 10 and two spring washers 15 .

[0041] Embodiment 2:

[0042] Combination Figure 4 and Figure 5 As shown, on the basis of the first embodiment, an annular protrusion 8a is integrally formed on the outer peripheral surface of the shell of the electrical connector 8, and a stainless steel wire 11 is tied between the annular protrusion 8a and the tail clamp screw 10. Specifically, two wire locking holes 90° apart are provided on the annular protrusion 8a, and the stainless steel wire 11 is connected to the wire locking holes. The stainless steel wire 11 is a multi-strand structure, and the tying method of the stainless steel wire 11 is as follows: the stainless steel wire 11 is cross-wound from the first wire locking hole, and the stainless steel wire 11 passes through the first tail clamp screw 10 and then passes through the second wire locking hole in one strand, and then cross-wound, and is finished on the second tail clamp screw 10, and the tail end of the stainless steel wire 11 is bent.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A shielded cable, comprising a cable (100) and an electrical connector (8) installed at the head end of the cable (100); the cable (100) comprises, from the inside to the outside, an installation wire (1), a wave-proof sleeve (4) and an alkali-free glass fiber sleeve (9); characterized in that: A polyimide film (2) is wound around the head end and the tail end of the installation line (1), and a first layer of fiber lines (3a) is tied onto the polyimide film (2); the polyimide film (2) and the first layer of fiber lines (3a) are located between the installation line (1) and the wave-proof sleeve (4); A first polytetrafluoroethylene tube (5) is respectively sleeved on the head end and the tail end of the wave-proof sleeve (4), and the wave-proof sleeve (4) is flanged and placed on the outer peripheral surface of the first polytetrafluoroethylene tube (5), a second layer of fiber wire (3b) is tied at the flanged position of the wave-proof sleeve (4), and an alkali-free glass fiber sleeve (9) wraps the second layer of fiber wire (3b) inside; A third layer of fiber lines (3c) is tied to the head end and the tail end of the alkali-free glass fiber sleeve (9) respectively.

2. A shielded cable as claimed in claim 1, characterized in that: The first layer of fiber lines (3a), the second layer of fiber lines (3b), and the third layer of fiber lines (3c) are all aramid III fiber lines.

3. A shielded cable as claimed in claim 1, characterized in that: The first layer of fiber lines (3a) are respectively tied to two ends of the polyimide film (2).

4. A shielded cable as claimed in claim 1, characterized in that: A copper yarn (6) is arranged inside the head end of the cable (100), and the copper yarn (6) is overlapped on the tail attachment of the electrical connector (8) in a 360° ring shape.

5. A shielded cable as claimed in claim 4, characterized in that: The copper yarn (6) is hooked in the flange of the wave-proof sleeve (4), and the second layer of fiber thread (3b) is tied to the copper yarn (6) to tightly bind the flange of the wave-proof sleeve (4) and the hooked part of the copper yarn (6).

6. A shielded cable as claimed in claim 1, characterized in that: A tail clamp (7) is provided at the head end of the cable (100), and the tail clamp (7) is a pair of clamp structures. The tail clamp (7) embraces the outside of the third layer of fiber wire (3c) at the head end of the alkali-free glass fiber sleeve (9), and the tail clamp (7) is locked by two tail clamp screws (10) and two spring washers (15).

7. A shielded cable as claimed in claim 6, characterized in that: An annular protrusion (8a) is integrally formed on the outer peripheral surface of the shell of the electrical connector (8), and a stainless steel wire (11) is tied between the annular protrusion (8a) and the tail clamp screw (10).

8. A shielded cable as claimed in claim 7, characterized in that: The annular protrusion (8a) is provided with two wire locking holes which are 90 degrees apart, and the stainless steel wire (11) is connected to the wire locking holes.

9. A shielded cable as claimed in claim 7, characterized in that: The stainless steel wire (11) is a multi-strand structure, and the binding method of the stainless steel wire (11) is as follows: the stainless steel wire (11) is cross-wound from the first wire locking hole, the stainless steel wire (11) passes through the first tail clamp screw (10), and then one strand passes through the second wire locking hole, and then cross-wound, and the end is closed on the second tail clamp screw (10), and the tail end of the stainless steel wire (11) is bent.

10. A shielded cable as claimed in claim 1, characterized in that: A grounding wire (12) is provided at the tail end of the cable (100), and one end of the grounding wire (12) is bent and clamped at the flange of the wave-proof sleeve (4), and is fastened by the second layer of fiber wire (3b); the other end of the grounding wire (12) is connected to a wiring plate (13), and the connection portion between the wiring plate (13) and the grounding wire (12) is sheathed with a second polytetrafluoroethylene tube (14).

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