A military-grade smooth composite film-wrapped wire and cable

Abstract

This application provides a military-grade smooth composite film-wrapped wire and cable, relating to the cable field. It includes multiple cores, an inner sheath, multiple pressure strips, and an outer sheath. The cores are closely arranged around the central axis of the outer sheath. The cores are located inside the inner sheath, and the inner sheath is located inside the outer sheath. The pressure strips are located between the inner and outer sheaths. The outer surfaces of each core form a central gap, located inside the area surrounded by the cores. Adjacent cores form inner gaps, located outside the areas surrounded by the cores. The pressure strips are positioned corresponding to the central gaps. The inner sheath has multiple outward protrusions and multiple inward concave portions. The side of each core away from the central axis of the outer sheath is located inside each outward protrusion, and each inward concave portion is located inside each inner gap. The pressure strips are located inside the inward concave portions, and the pressure strips are pressed tightly against the inward concave portions. The outer sheath is pressed tightly against the pressure strips. This cable can reduce the relative movement and torsion between the cores.

Description

Technical Field

[0001] This application relates to the field of wire and cable technology, and in particular to a military-grade smooth composite film-wrapped wire and cable. Background Technology

[0002] Wires and cables, often simply called cables, are typically used for transmitting electricity or electrical signals.

[0003] Existing wires and cables typically consist of wire cores, an inner sheath, a shielding layer, and an outer sheath. The inner sheath bundles multiple wire cores together, the shielding layer wraps around the inner sheath to shield external electromagnetic signals, and the outer sheath protects the wires and cables (waterproof, heat-insulating, abrasion-resistant, etc.).

[0004] In the field of military wires and cables, there are high requirements for the stability of the wire cores. It is not advisable for multiple wire cores to undergo relative displacement or torsion (relative displacement and torsion will cause changes in the magnetic field near the wire cores), which will affect the stability of signal transmission. However, existing wires and cables are prone to relative displacement and torsion of the wire cores when subjected to external forces. Summary of the Invention

[0005] This application provides a military-grade smooth composite film wrapped wire and cable to solve the technical problem that wires and cables are prone to relative displacement and torsion of the core when subjected to external force in the prior art.

[0006] In an embodiment of this application, a military-grade smooth composite film-wrapped wire and cable is provided, comprising multiple cores, an inner sheath, multiple pressure strips, and an outer sheath. The cores are closely arranged around the central axis of the outer sheath. The cores are located inside the inner sheath, and the inner sheath is located inside the outer sheath. The pressure strips are located between the inner and outer sheaths. The outer surfaces of each core form a central gap, located inside the area surrounded by each core. Adjacent cores form inner gaps, located outside the areas surrounded by each core. The pressure strips are positioned corresponding to the central gaps.

[0007] The inner cladding has multiple outward protrusions and multiple inward concave portions. The side of each wire core away from the central axis of the outer cladding is located inside each of the outward protrusions. Each of the inward concave portions is located inside each of the inner gaps. The pressure strip is located inside the inward concave portion. The pressure strip is pressed tightly against the inward concave portion. The outer cladding is pressed tightly against the pressure strip.

[0008] In some embodiments of this application, the wire core includes a first wire core, a second wire core, and a third wire core, wherein the first wire core, the second wire core, and the third wire core are closely arranged around the central axis of the outer cladding;

[0009] The inner gap includes a first inner gap, a second inner gap, and a third inner gap. The first inner gap is formed by the first wire core and the second wire core surrounding each other. The second inner gap is formed by the second wire core and the third wire core surrounding each other. The third inner gap is formed by the third wire core and the first wire core surrounding each other.

[0010] The inner cladding includes a first outward protrusion, a second outward protrusion, and a third outward protrusion. The side of the first wire core away from the central axis of the outer cladding is located inside the first outward protrusion. The side of the second wire core away from the central axis of the outer cladding is located inside the second outward protrusion. The side of the third wire core away from the central axis of the outer cladding is located inside the third outward protrusion.

[0011] The first concave portion is located inside the first inner gap, the second concave portion is located inside the second inner gap, and the third concave portion is located inside the third inner gap;

[0012] There is a first outer gap between the first concave portion and the outer wrapping layer, a second outer gap between the second concave portion and the outer wrapping layer, and a third outer gap between the third concave portion and the outer wrapping layer;

[0013] The pressure strip includes a first pressure strip, a second pressure strip, and a third pressure strip. The first pressure strip is located inside the first outer gap, the second pressure strip is located inside the second outer gap, and the third pressure strip is located inside the third outer gap.

[0014] The first protruding part is pressed and engaged with the first wire core, the second protruding part is pressed and engaged with the second wire core, and the third protruding part is pressed and engaged with the third wire core;

[0015] The first pressure strip is pressed and engaged with the first concave portion, the second pressure strip is pressed and engaged with the second concave portion, and the third pressure strip is pressed and engaged with the third concave portion;

[0016] The side of the first pressure strip away from the first concave portion is pressed tightly against the outer wrapping layer, the side of the second pressure strip away from the second concave portion is pressed tightly against the outer wrapping layer, and the side of the third pressure strip away from the third concave portion is pressed tightly against the outer wrapping layer.

[0017] In some embodiments of this application, the inner wrapping layer is elastic and is in a stretched state.

[0018] In some embodiments of this application, a central positioning strip is provided inside the central gap, and the central positioning strip is pressed and engaged with the first wire core, the second wire core and the third wire core respectively.

[0019] In some embodiments of this application, a first positioning strip is provided inside the first inner gap. The first positioning strip is located between the area surrounded by the first concave portion, the first wire core, and the second wire core. The first positioning strip is pressed against the first concave portion, the first wire core, and the second wire core, respectively; and / or,

[0020] A second positioning strip is provided inside the second inner gap. The second positioning strip is located between the area surrounded by the second inner recess, the second wire core, and the third wire core. The second positioning strip is pressed against the second inner recess, the second wire core, and the third wire core respectively; and / or,

[0021] The third inner gap is provided with a third positioning strip, which is located between the area surrounded by the third inner recess, the third wire core, and the first wire core. The third positioning strip is pressed and engaged with the third inner recess, the third wire core, and the first wire core, respectively.

[0022] In some embodiments of this application, the first conductor includes a first conductor and a first insulating layer, wherein the first insulating layer is disposed to wrap around the first conductor;

[0023] The second conductor includes a second conductor and a second insulation layer, wherein the second insulation layer is disposed to wrap around the second conductor;

[0024] The third conductor includes a third conductor and a third insulation layer, wherein the third insulation layer is provided to wrap the third conductor.

[0025] The diameters of the outer surfaces of the first insulating layer, the second insulating layer, and the third insulating layer are equal.

[0026] The first insulating layer, the second insulating layer, and the third insulating layer are closely arranged around the central axis of the outer cladding;

[0027] The first conductor, the second conductor, and the third conductor are arranged in parallel.

[0028] In some embodiments of this application, the outer wrapping layer includes an elastic layer, the inner wrapping layer and the pressure strip are located inside the elastic layer, the elastic layer is in a stretched state, and the pressure strip is pressed against the inner surface of the elastic layer.

[0029] In some embodiments of this application, the elastic layer is made of a heat-shrinkable material.

[0030] In some embodiments of this application, the outer wrapping layer further includes a shielding layer, which wraps around the elastic layer.

[0031] In some embodiments of this application, the outer wrapping layer further includes a heat insulation layer and a protective layer. The heat insulation layer wraps around the shielding layer, and the protective layer wraps around the heat insulation layer. The heat insulation layer is made of heat insulation material, and the protective layer is made of polyimide material. The thickness of the heat insulation layer is greater than the thickness of the inner wrapping layer.

[0032] This application has the following beneficial effects:

[0033] The military-grade smooth composite film-wrapped wire and cable provided in this application has an inner sheath that wraps multiple wire cores inside, and an outer sheath that presses the inner sheath with a pressure bar, so that the inner sheath forms a stable wave-shaped (cross-sectional shape) constraint structure. While tightening the wire cores, the radial pressing and axial limiting action of the pressure bar keeps the relative position of each wire core stable, which solves the technical problem in the prior art that wires and cables are prone to relative displacement and torsion of the wire cores when subjected to external forces. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the military-grade smooth composite film-wrapped wire and cable in the embodiments of this application;

[0036] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0037] Figure 3 This is a schematic diagram of the connection between the elastic layer and the inner wrapping layer in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the connection between each pressure strip, the inner wrapping layer, and the elastic layer in the embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the connection between the inner cladding and each conductor in an embodiment of this application;

[0040] Figure 6 This is a schematic diagram of the structure connecting each positioning strip with each wire core and the inner wrapping layer in the embodiments of this application.

[0041] Figure label:

[0042] 101. Core wire; 102. Inner sheath; 103. Pressure strip; 104. Outer sheath; 105. Center gap; 106. Inner gap; 107. First core wire; 108. Second core wire; 109. Third core wire; 110. First inner gap; 111. Second inner gap; 112. Third inner gap; 113. First outward protrusion; 114. Second outward protrusion; 115. Third outward protrusion; 116. First outer gap; 117. Second outer gap; 118. Third outer gap; 119. First pressure strip; 20. Second pressure strip; 121. Third pressure strip; 122. Center positioning strip; 123. First positioning strip; 124. Second positioning strip; 125. Third positioning strip; 126. First conductor; 127. First insulation layer; 128. Second conductor; 129. Second insulation layer; 130. Third conductor; 131. Third insulation layer; 132. Elastic layer; 133. Shielding layer; 134. Heat insulation layer; 135. Protective layer; 136. First recessed portion; 137. Second recessed portion; 138. Third recessed portion. Detailed Implementation

[0043] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The terminology used in the embodiments section of this application is only used to explain the specific embodiments of this application and is not intended to limit this application.

[0044] like Figures 1 to 6 As shown in the embodiments of this application, a military-grade smooth composite film-wrapped wire and cable is provided, including multiple cores 101, an inner wrapping layer 102, multiple pressure strips 103, and an outer wrapping layer 104. Each core 101 is closely arranged around the central axis of the outer wrapping layer 104. The cores 101 are located inside the inner wrapping layer 102, and the inner wrapping layer 102 is located inside the outer wrapping layer 104. The pressure strips 103 are located between the inner wrapping layer 102 and the outer wrapping layer 104. The outer surfaces of each core 101 form a central gap 105, which is located inside the area surrounded by each core 101. Adjacent cores 101 form an inner gap 106, which is located outside the area surrounded by each core 101. The pressure strips 103 are provided corresponding to the central gap 105.

[0045] The inner wrapping layer 102 has multiple outward protrusions and multiple inward concave portions. The side of each wire core 101 away from the central axis of the outer wrapping layer 104 is located inside each of the outward protrusions. Each of the inward concave portions is located inside each of the inner gaps 106. The pressure strip 103 is located inside the inward concave portion. The pressure strip 103 is pressed tightly against the inward concave portion. The outer wrapping layer 104 is pressed tightly against the pressure strip 103.

[0046] The military-grade smooth composite film-wrapped wire and cable provided in this embodiment has an inner sheath 102 that wraps multiple wire cores 101 inside. The outer sheath 104 presses the inner sheath 102 tightly through a pressure strip 103, so that the inner sheath 102 forms a stable wave-shaped (cross-sectional shape) constraint structure. While tightening the wire cores 101, the radial pressing and axial limiting action of the pressure strip 103 keeps the relative position of each wire core 101 stable, which solves the technical problem in the prior art that the wire cores 101 are prone to relative displacement and torsion when the wire and cable are subjected to external force.

[0047] In some embodiments of this example, the wire core 101 includes a first wire core 107, a second wire core 108, and a third wire core 109, which are closely arranged around the central axis of the outer cladding 104.

[0048] The inner gap 106 includes a first inner gap 110, a second inner gap 111, and a third inner gap 112. The first inner gap 110 is formed by the first wire core 107 and the second wire core 108. The second inner gap 111 is formed by the second wire core 108 and the third wire core 109. The third inner gap 112 is formed by the third wire core 109 and the first wire core 107.

[0049] The inner cladding 102 includes a first outward protrusion 113, a second outward protrusion 114, and a third outward protrusion 115. The side of the first core 107 away from the central axis of the outer cladding 104 is located inside the first outward protrusion 113. The side of the second core 108 away from the central axis of the outer cladding 104 is located inside the second outward protrusion 114. The side of the third core 109 away from the central axis of the outer cladding 104 is located inside the third outward protrusion 115.

[0050] The first recess 136 is located inside the first inner gap 110, the second recess 137 is located inside the second inner gap 111, and the third recess 138 is located inside the third inner gap 112.

[0051] The first concave portion 136 has a first outer gap 116 between it and the outer wrapping layer 104, the second concave portion 137 has a second outer gap 117 between it and the outer wrapping layer 104, and the third concave portion 138 has a third outer gap 118 between it and the outer wrapping layer 104.

[0052] The pressure strip 103 includes a first pressure strip 119, a second pressure strip 120, and a third pressure strip 121. The first pressure strip 119 is located inside the first outer gap 116, the second pressure strip 120 is located inside the second outer gap 117, and the third pressure strip 121 is located inside the third outer gap 118.

[0053] The first protrusion 113 is pressed and engaged with the first wire core 107, the second protrusion 114 is pressed and engaged with the second wire core 108, and the third protrusion 115 is pressed and engaged with the third wire core 109.

[0054] The first pressure strip 119 is pressed and engaged with the first concave portion 136, the second pressure strip 120 is pressed and engaged with the second concave portion 137, and the third pressure strip 121 is pressed and engaged with the third concave portion 138.

[0055] The side of the first pressure strip 119 away from the first concave portion 136 is pressed tightly against the outer wrapping layer 104, the side of the second pressure strip 120 away from the second concave portion 137 is pressed tightly against the outer wrapping layer 104, and the side of the third pressure strip 121 away from the third concave portion 138 is pressed tightly against the outer wrapping layer 104.

[0056] Through the above-described implementation of this embodiment, under the compression of the first pressure strip 119, the second pressure strip 120, and the third pressure strip 121, the inner cladding 102 forms a first inner recess 136, a second inner recess 137, and a third inner recess 138 at the first inner gap 110, the second inner gap 111, and the third inner gap 112, respectively. The first inner recess 136, the second inner recess 137, and the third inner recess 138 position the first wire core 107, the second wire core 108, and the third wire core 109 along the circumferential direction, preventing the first wire core from being compressed. Core 107, second core 108, and third core 109 undergo relative movement and torsion; the first convex portion 113, the second convex portion 114, and the third convex portion 115 respectively press the first core 107, the second core 108, and the third core 109 toward the central axis of the outer wrapping layer 104, restricting the radial relative movement of the first core 107, the second core 108, and the third core 109 toward the outer wrapping layer 104, so that the first core 107, the second core 108, and the third core 109 maintain a stable parallel relationship.

[0057] In some embodiments of this example, the inner wrapping layer 102 is elastic and is in a stretched state.

[0058] Through the above implementation of this embodiment, during the production process, after the first core 107, the second core 108, and the third core 109 are arranged, an inner wrapping layer 102 is wrapped around all the cores 101. The initial cross-sectional shape of the inner wrapping layer 102 is triangular (at this time, the inner wrapping layer 102 already has a certain tension). Then, each pressure strip 103 presses the inner wrapping layer 102 towards the direction close to the central axis of the outer wrapping layer 104, so that the cross-section of the inner wrapping layer 102 forms a wave shape. At this time, the tension of the inner wrapping layer 102 is further increased, which binds each core 101 tightly and limits each core 101 along the axial direction.

[0059] In some embodiments of this example, a center positioning strip 122 is provided inside the center gap 105, and the center positioning strip 122 is pressed and engaged with the first wire core 107, the second wire core 108 and the third wire core 109 respectively.

[0060] Through the above implementation of this embodiment, the central positioning strip 122 provides initial support and positioning for each wire core 101, which facilitates the arrangement of each wire core 101. After the wire and cable are wrapped, the central positioning strip 122 can provide elastic force for each wire core 101 in the radial direction and provide a limit in the circumferential direction, thereby improving the relative positional stability of each wire core 101.

[0061] In some embodiments of this example, a first positioning strip 123 is provided inside the first inner gap 110. The first positioning strip 123 is located between the areas surrounded by the first inner recess 136, the first wire core 107, and the second wire core 108. The first positioning strip 123 is pressed and engaged with the first inner recess 136, the first wire core 107, and the second wire core 108, respectively; and / or,

[0062] A second positioning strip 124 is provided inside the second inner gap 111. The second positioning strip 124 is located between the area surrounded by the second inner recess 137, the second wire core 108, and the third wire core 109. The second positioning strip 124 is pressed and engaged with the second inner recess 137, the second wire core 108, and the third wire core 109 respectively; and / or,

[0063] The third inner gap 112 is provided with a third positioning strip 125. The third positioning strip 125 is located between the area surrounded by the third inner recess 138, the third wire core 109, and the first wire core 107. The third positioning strip 125 is pressed and engaged with the third inner recess 138, the third wire core 109, and the first wire core 107 respectively.

[0064] Through the above-described implementation method of this embodiment, after the arrangement of each wire core 101 is completed, the first positioning strip 123, the second positioning strip 124, and the third positioning strip 125 respectively position each wire core 101 along the circumferential direction, which facilitates wrapping the inner wrapping layer 102 and increases the initial tension of the inner wrapping layer 102 (the tension of the inner wrapping layer 102 before the installation of the pressure strip 103). After the installation of the pressure strip 103, the tension of the inner wrapping layer 102 is greater, which can improve the positioning stability of each wire core 101.

[0065] In some embodiments of this example, the first conductor 107 includes a first conductor 126 and a first insulating layer 127, wherein the first insulating layer 127 is disposed to wrap the first conductor 126;

[0066] The second conductor 108 includes a second conductor 128 and a second insulating layer 129, wherein the second insulating layer 129 is disposed to wrap the second conductor 128;

[0067] The third conductor 109 includes a third conductor 130 and a third insulation layer 131, wherein the third insulation layer 131 is disposed to wrap the third conductor 130;

[0068] The diameters of the outer surfaces of the first insulating layer 127, the second insulating layer 129, and the third insulating layer 131 are equal.

[0069] The first insulating layer 127, the second insulating layer 129, and the third insulating layer 131 are closely arranged around the central axis of the outer cladding 104;

[0070] The first conductor 126, the second conductor 128, and the third conductor 130 are arranged in parallel.

[0071] In some embodiments of this example, the outer wrapping layer 104 includes an elastic layer 132, the inner wrapping layer 102 and the pressure strip 103 are located inside the elastic layer 132, the elastic layer 132 is in a stretched state, and the pressure strip 103 is pressed against the inner surface of the elastic layer 132.

[0072] In some embodiments of this example, the elastic layer 132 is made of a heat-shrinkable material.

[0073] Through the above-described embodiments of this example, heat-shrinkable materials, also known as polymer shape memory materials, are intelligent materials that combine polymer materials with radiation processing technology. Ordinary polymer materials such as polyethylene and polyvinyl chloride are typically linear structures. After being irradiated by radiation sources such as electron accelerators, they become network structures, giving them a unique "memory effect." The expanded and cooled material can shrink back to its original shape after being heated. The memory properties of heat-shrinkable materials can be used to manufacture heat-shrinkable pipes, films, and profiles. Their main characteristic is that they shrink upon heating and cover the outer surface of an object, providing insulation, moisture protection, sealing, protection, and splicing functions. The radial shrinkage rate of the shrinkable material can reach 50%-80%. The elastic layer 132 is made of polymer heat-shrinkable material. During the wrapping process of wires and cables, the initial tension of the elastic layer 132 is close to zero. After being heated by hot air, it shrinks and, upon cooling, provides clamping force to the internal pressure strip 103 and the inner wrapping layer 102. Simultaneously, it also receives radial pressure, thus generating tension.

[0074] In some embodiments of this example, the outer wrapping layer 104 further includes a shielding layer 133, which wraps around the elastic layer 132.

[0075] In some embodiments of this example, the outer wrapping layer 104 further includes a heat insulation layer 134 and a protective layer 135. The heat insulation layer 134 is disposed around the shielding layer 133, and the protective layer 135 is disposed around the heat insulation layer 134. The heat insulation layer 134 is made of heat insulation material, and the protective layer 135 is made of polyimide material. The thickness of the heat insulation layer 134 is greater than the thickness of the inner wrapping layer 102.

[0076] Preferably, talc powder is filled between the pressure strip 103 and the elastic layer 132, and between the inner wrapping layer 102 and the elastic layer 132. The filling thickness of the talc powder is between 0.1 mm and 0.2 mm. When the wire and cable are subjected to external torsional force, relative slippage can occur between the outer wrapping layer 104 and the pressure strip 103, and between the outer wrapping layer 104 and the inner wrapping layer 102. This reduces the transmission of torsional force to the inner side of the outer wrapping layer 104, thereby preventing relative torsion between the wire cores 101 and improving the stability of the parallel relationship between the wire cores 101.

[0077] In the description of the embodiments of this application, it should be noted that the terms "the above embodiments," "some embodiments," "the above implementation methods," "some implementation methods," "possible embodiments," or "possible implementation methods," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] In the description of the embodiments of this application, it should be noted that "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0079] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0080] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They can change accordingly depending on the orientation of the structure, and therefore should not be construed as a limitation on the embodiments of this application. Unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of the embodiments of this application, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Unless otherwise stated, "multiple" means two or more.

[0082] The above embodiments are merely explanations of this application and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to the implementation methods of this application without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A military-grade smooth composite film-wrapped wire and cable, characterized in that, The device includes multiple wire cores, an inner wrapping layer, multiple pressure strips, and an outer wrapping layer. The wire cores are closely arranged around the central axis of the outer wrapping layer. The wire cores are located inside the inner wrapping layer, and the inner wrapping layer is located inside the outer wrapping layer. The pressure strips are located between the inner and outer wrapping layers. The outer surfaces of each wire core form a central gap, which is located inside the area surrounded by each wire core. Adjacent wire cores form inner gaps, which are located outside the areas surrounded by each wire core. The pressure strips are positioned corresponding to the central gaps. The inner cladding has multiple outward protrusions and multiple inward concave portions. The side of each wire core away from the central axis of the outer cladding is located inside each of the outward protrusions. Each of the inward concave portions is located inside each of the inner gaps. The pressure strip is located inside the inward concave portion. The pressure strip is pressed tightly against the inward concave portion. The outer cladding is pressed tightly against the pressure strip. The core includes a first core, a second core, and a third core, which are closely arranged around the central axis of the outer cladding. The inner gap includes a first inner gap, a second inner gap, and a third inner gap. The first inner gap is formed by the first wire core and the second wire core surrounding each other. The second inner gap is formed by the second wire core and the third wire core surrounding each other. The third inner gap is formed by the third wire core and the first wire core surrounding each other. The inner cladding includes a first outward protrusion, a second outward protrusion, and a third outward protrusion. The side of the first wire core away from the central axis of the outer cladding is located inside the first outward protrusion. The side of the second wire core away from the central axis of the outer cladding is located inside the second outward protrusion. The side of the third wire core away from the central axis of the outer cladding is located inside the third outward protrusion. The first concave portion is located inside the first inner gap, the second concave portion is located inside the second inner gap, and the third concave portion is located inside the third inner gap; There is a first outer gap between the first concave portion and the outer wrapping layer, a second outer gap between the second concave portion and the outer wrapping layer, and a third outer gap between the third concave portion and the outer wrapping layer; The pressure strip includes a first pressure strip, a second pressure strip, and a third pressure strip. The first pressure strip is located inside the first outer gap, the second pressure strip is located inside the second outer gap, and the third pressure strip is located inside the third outer gap. The first protruding part is pressed and engaged with the first wire core, the second protruding part is pressed and engaged with the second wire core, and the third protruding part is pressed and engaged with the third wire core; The first pressure strip is pressed and engaged with the first concave portion, the second pressure strip is pressed and engaged with the second concave portion, and the third pressure strip is pressed and engaged with the third concave portion; The side of the first pressure strip away from the first concave portion is pressed tightly against the outer wrapping layer; the side of the second pressure strip away from the second concave portion is pressed tightly against the outer wrapping layer; and the side of the third pressure strip away from the third concave portion is pressed tightly against the outer wrapping layer. A first positioning strip is provided inside the first inner gap. The first positioning strip is located between the area surrounded by the first inner recess, the first wire core, and the second wire core. The first positioning strip is pressed and engaged with the first inner recess, the first wire core, and the second wire core, respectively; and / or, A second positioning strip is provided inside the second inner gap. The second positioning strip is located between the area surrounded by the second inner recess, the second wire core, and the third wire core. The second positioning strip is pressed against the second inner recess, the second wire core, and the third wire core respectively; and / or, The third inner gap is provided with a third positioning strip, which is located between the area surrounded by the third inner recess, the third wire core, and the first wire core. The third positioning strip is pressed and engaged with the third inner recess, the third wire core, and the first wire core, respectively.

2. The military-grade smooth composite film-wrapped wire and cable according to claim 1, characterized in that, The inner cladding is elastic and is in a stretched state.

3. The military-grade smooth composite film-wrapped wire and cable according to claim 1, characterized in that, The central gap is provided with a central positioning strip, which is pressed and engaged with the first wire core, the second wire core and the third wire core respectively.

4. The military-grade smooth composite film-wrapped wire and cable according to claim 1, characterized in that, The first conductor includes a first conductor and a first insulating layer, wherein the first insulating layer is disposed to wrap the first conductor; The second conductor includes a second conductor and a second insulation layer, wherein the second insulation layer is disposed to wrap around the second conductor; The third conductor includes a third conductor and a third insulation layer, wherein the third insulation layer is provided to wrap the third conductor. The diameters of the outer surfaces of the first insulating layer, the second insulating layer, and the third insulating layer are equal. The first insulating layer, the second insulating layer, and the third insulating layer are closely arranged around the central axis of the outer cladding; The first conductor, the second conductor, and the third conductor are arranged in parallel.

5. The military-grade smooth composite film-wrapped wire and cable according to claim 4, characterized in that, The outer wrapping layer includes an elastic layer, the inner wrapping layer and the pressure strip are located inside the elastic layer, the elastic layer is in a stretched state, and the pressure strip is pressed tightly against the inner side of the elastic layer.

6. The military-grade smooth composite film-wrapped wire and cable according to claim 5, characterized in that, The elastic layer is made of a heat-shrinkable material.

7. The military-grade smooth composite film-wrapped wire and cable according to claim 5, characterized in that, The outer wrapping layer also includes a shielding layer, which is disposed around the elastic layer.

8. The military-grade smooth composite film-wrapped wire and cable according to claim 7, characterized in that, The outer wrapping layer further includes a heat insulation layer and a protective layer. The heat insulation layer wraps around the shielding layer, and the protective layer wraps around the heat insulation layer. The heat insulation layer is made of heat insulation material, and the protective layer is made of polyimide material. The thickness of the heat insulation layer is greater than the thickness of the inner wrapping layer.

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