Moisture-proof efficient single-shield transmission control cable

Abstract

The application discloses a kind of damp-proof efficient single-shield transmission control cable, it is related to cable technical field.The application includes multiple twisted conductive core, the outside of multiple twisted conductive core is equipped with composite inner insulation layer, the outside of composite inner insulation layer is equipped with efficient single-shield layer, the outside of efficient single-shield layer is equipped with water-blocking filling layer, the outside of shielding protection layer is equipped with water-blocking filling layer.The application is set by water-blocking filling layer, so that cable body is internally damp, and permeated water will pass through water-blocking filling layer and be absorbed by water-absorbing shrinkable foam, water-absorbing shrinkable foam absorbs itself and shrinks, and water-absorbing shrinkable foam after shrinking is followed by elastic sleeve in stress detection layer due to the adhesion with stress detection layer, and the degree of surface depression of cable body can be used to reflect the damp state inside the cable after long-term use, and then regular replacement is carried out, and the detection accuracy is higher.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a moisture-proof, high-efficiency single-shielded transmission and control cable. Background Technology

[0002] A cable is a device for transmitting electrical energy or signals, typically composed of several or groups of conductors. Types of cables include power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, and many more.

[0003] According to a published description of a moisture-proof cable (publication number: CN111370176B), it includes a conductor core. An insulation layer, a blocking layer, a moisture-proof pipe, and an outer sheath are sequentially fixedly sleeved on the outside of the conductor core. The blocking layer is coated with a hydrophobic layer. The moisture-proof cable has multiple drainage devices arranged sequentially. Each drainage device includes two separator permanent magnet rings sealed and fixedly connected within the moisture-proof pipe, and a second annular iron core and a first annular iron core airtightly slidably connected within the moisture-proof pipe. The center lines of the two separator permanent magnet rings and the second annular iron core are the same. The advantages are: the water-absorbing and expanding material squeezes water out of the moisture-proof pipe; furthermore, the action of the first annular iron core, the second annular iron core, the separator permanent magnet rings, and the shielding ring causes the first annular iron core and the second annular iron core to reciprocate within the moisture-proof pipe, further squeezing out moisture and preventing water vapor from entering the cable and causing damage.

[0004] The design of the aforementioned application, consisting of a first annular core, a second annular core, a separating permanent magnet ring, and a shielding ring, makes it difficult to detect moisture levels inside the cable during daily use. Maintenance personnel can only replace the cable periodically during on-site inspections, and cannot flexibly replace it based on the actual moisture levels, resulting in increased cable costs. This design needs improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a moisture-proof, high-efficiency single-shielded transmission control cable, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a moisture-proof, high-efficiency single-shielded transmission control cable, comprising a multi-strand stranded conductive core, a composite inner insulation layer on the outside of the multi-strand stranded conductive core, a high-efficiency single shielding layer on the outside of the composite inner insulation layer, and a water-blocking filling layer on the outside of the shielding protection layer. The composite inner insulation layer contains an epoxy resin + glass fiber, polyimide composite layer, which aims to isolate the conductive core from the outer layer, prevent leakage and breakdown, and also ensure temperature resistance. The high-efficiency single shielding layer is made of materials such as metal foil (aluminum foil, copper foil) or braided mesh (tinned copper mesh) to suppress external electromagnetic interference (EMI) and ensure signal transmission stability. The shielding protection layer is made of a thin polymer: PVC, PE, or fiber cloth to protect the shielding layer from wear or corrosion and prevent shielding layer breakage and failure.

[0007] The water-blocking filling layer includes a spiral skeleton and water-absorbing shrinkable foam. The spiral skeleton and water-absorbing shrinkable foam are spirally distributed and bonded to the outer surface of the water-blocking filling layer to absorb permeated water. The spiral skeleton has a cooling liquid cavity inside for filling with heat dissipation cooling liquid. The spiral skeleton is spirally adsorbed on the outside of the water-blocking filling layer to provide support. The purpose of the spiral distribution is mainly to not affect the distribution density of the water-absorbing shrinkable foam on the outside of the water-blocking filling layer, so that the water-absorbing shrinkable foam is more dispersed on the outside of the water-blocking filling layer, resulting in better water absorption effect of the water-absorbing shrinkable foam.

[0008] The outer side of the water-blocking filling layer is also provided with a stress detection layer. The purpose of the stress detection layer is mainly to show the moisture condition inside the cable body by observing the shrinkage of the stress detection layer after water enters the water-blocking filling layer.

[0009] According to the above technical solution, the stress detection layer includes an elastic sleeve, a metal support rod fixedly connected to the surface of the elastic sleeve, a partition strip penetrating one end of the metal support rod, the partition strip being adhered to the circumferential surface of the elastic sleeve, and a flow cavity formed on the outer side of the elastic sleeve. The design purpose of the stress detection layer also includes allowing the adhesive to penetrate the adhesion between the water-blocking filling layer and the stress detection layer through rotation after installation.

[0010] According to the above technical solution, the metal strut includes an adhesion cavity inside the metal strut for storing adhesive. One end of the adhesion cavity has a crescent-shaped opening for the adhesive to penetrate. One end of the crescent-shaped opening is rotatably connected to a rotating thread, and the outer side of the rotating thread has a through-hole.

[0011] According to the above technical solution, a stress detection sub-layer is provided on the outer side of the stress detection layer, and a cable sheath is provided on the outer side of the stress detection sub-layer. An elastic polymer (such as TPU or silicone rubber) is disposed inside the stress detection sub-layer to assist stress transmission, thereby protecting the stress detection layer and buffering external impacts. The cable sheath is made of chlorinated polyethylene (CPE) material, providing the outermost layer of mechanical protection against environmental wear, chemical corrosion, and high and low temperatures.

[0012] According to the above technical solution, one end of the through-hole is not connected to the adhesion cavity in the initial state, and the other end of the through-hole is not connected to the flow cavity in the initial state. This design avoids the penetration of mucus during cable installation.

[0013] According to the above technical solution, an elastic arc sheet is fixedly connected to the outer side of the partition strip, and the arc surface of the elastic arc sheet abuts against the inner side of the stress detection sub-layer. The design of the elastic arc sheet can reflect the moisture condition inside the cable body through its own compression protrusion and concave deformation.

[0014] According to the above technical solution, multiple metal struts are arranged in a circumferential array on the circumferential surface of the elastic sleeve. This design ensures both effective support and sufficient penetration area of ​​the adhesive.

[0015] According to the above technical solution, both ends of the coolant chamber are sealed. The sealing design prevents coolant leakage.

[0016] This invention provides a moisture-proof, high-efficiency single-shielded transmission and control cable. It has the following advantages:

[0017] (1) By setting a water-blocking filling layer, the water seeping into the cable body after it gets damp will pass through the water-blocking filling layer and be absorbed by the water-absorbing shrink foam. The water-absorbing shrink foam absorbs itself and shrinks. After shrinking, the water-absorbing shrink foam adheres to the stress detection layer, causing the elastic soft sleeve in the stress detection layer to shrink as well. With long-term use, the degree of depression on the surface of the cable body can reflect the moisture state inside the cable, and then it can be replaced regularly, resulting in higher detection accuracy.

[0018] (2) By setting the stress detection layer, the adhesive inside the adhesion cavity flows out from the crescent-shaped opening, passes through the through-hole and the flow cavity, and enters the interior of the water-blocking filling layer. This allows the spiral skeleton and water-absorbing shrink foam inside the water-blocking filling layer to be stably bonded to the stress detection layer, thus ensuring the accuracy of moisture detection.

[0019] (3) By setting the stress detection layer, the present invention makes the rotating thread roll so that the two ends of the through-hole overlap with the flow cavity and the crescent notch respectively. This operation method simplifies the operation process by internally bonding after the cable is assembled, and avoids the application of adhesive during the installation process, which would lead to inaccurate subsequent installation and make it difficult to replace. Attached Figure Description

[0020] Figure 1 This is a three-dimensional appearance diagram of the entire invention;

[0021] Figure 2 This is a schematic diagram of the overall layered cross-section of the present invention;

[0022] Figure 3 This is a planar schematic diagram of the overall multi-strand stranded conductive core of the present invention;

[0023] Figure 4 This is a three-dimensional cross-sectional view of the first section of the entire invention;

[0024] Figure 5 This invention as a whole Figure 4 A magnified three-dimensional diagram of A in the middle;

[0025] Figure 6 This is a three-dimensional enlarged schematic diagram of the overall metal strut of the present invention;

[0026] Figure 7 This is a three-dimensional enlarged schematic diagram of the overall water-blocking filling layer of the present invention.

[0027] In the diagram: 1. Multi-strand stranded conductive core; 2. Composite inner insulation layer; 3. High-efficiency single shielding layer; 4. Shielding protection layer; 5. Water-blocking filling layer; 51. Spiral skeleton; 511. Coolant cavity; 52. Water-absorbing and shrinking foam; 6. Stress detection layer; 61. Elastic soft sheath; 62. Metal support rod; 621. Adhesion cavity; 622. Crescent notch; 623. Rotating thread rolling; 624. Through-hole; 63. Partition strip; 64. Flow cavity; 65. Elastic arc sheet; 7. Stress detection sub-layer; 8. Cable sheath. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Please see Figure 1-7One embodiment of the present invention is a moisture-proof, high-efficiency single-shielded transmission control cable, comprising a multi-strand stranded conductive core 1, a composite inner insulation layer 2 on the outside of the multi-strand stranded conductive core 1, a high-efficiency single shielding layer 3 on the outside of the composite inner insulation layer 2, a shielding protection layer 4 on the outside of the high-efficiency single shielding layer 3, and a water-blocking filling layer 5 on the outside of the shielding protection layer 4. The composite inner insulation layer 2 contains an epoxy resin + glass fiber, polyimide composite layer, the purpose of which is to isolate the conductive core from the outer layer, prevent leakage and breakdown, and also ensure temperature resistance. The high-efficiency single shielding layer 3 is made of materials such as aluminum foil, copper foil, or tin-plated copper mesh to suppress external electromagnetic interference (EMI) and ensure signal transmission stability. The shielding protection layer 4 is made of a thin polymer material such as PVC, PE, or fiber cloth to protect the shielding layer from wear or corrosion and prevent shielding layer breakage and failure.

[0030] The water-blocking filling layer 5 includes a spiral skeleton 51 and water-absorbing shrinkable foam 52. The spiral skeleton 51 and water-absorbing shrinkable foam 52 are spirally distributed and bonded to the outer surface of the water-blocking filling layer 5 to absorb infiltrated water. The spiral skeleton 51 has a coolant cavity 511 inside for filling with heat dissipation coolant. The spiral skeleton 51 is spirally adsorbed on the outside of the water-blocking filling layer 5 to provide support. The purpose of the spiral distribution is mainly to not affect the distribution density of the water-absorbing shrinkable foam 52 on the outside of the water-blocking filling layer 5, so that the water-absorbing shrinkable foam 52 is more dispersed on the outside of the water-blocking filling layer 5, and the water-absorbing shrinkable foam 52 has a better water absorption effect.

[0031] The outer side of the water-blocking filling layer 5 is also provided with a stress detection layer 6. The purpose of the stress detection layer 6 is to show the moisture condition inside the cable body by observing the shrinkage of the stress detection layer 6 after water enters the water-blocking filling layer 5.

[0032] The stress testing layer 6 includes an elastic sleeve 61, with a metal support rod 62 fixedly connected to its surface. One end of the metal support rod 62 has a partition strip 63 extending through it. The partition strip 63 is adhered to the circumferential surface of the elastic sleeve 61, and a flow cavity 64 is provided on the outer side of the elastic sleeve 61. The design purpose of the stress testing layer 6 also includes allowing the adhesive to penetrate the adhesion between the water-blocking filling layer 5 and the stress testing layer 6 through rotation after installation.

[0033] The metal strut 62 includes an adhesive cavity 621 inside. The adhesive cavity 621 is opened inside the metal strut 62 for storing adhesive. One end of the adhesive cavity 621 has a crescent-shaped notch 622 for the adhesive to penetrate. One end of the crescent-shaped notch 622 is rotatably connected to a rotating thread 623. The outer side of the rotating thread 623 has a through-hole 624.

[0034] A stress detection sub-layer 7 is provided on the outside of the stress detection layer 6, and a cable sheath 8 is provided on the outside of the stress detection sub-layer 7. The interior of the stress detection sub-layer 7 is filled with elastic polymers such as TPU and silicone rubber to assist in stress transmission, thereby protecting the stress detection layer 6 and buffering external impacts. The cable sheath 8 is made of chlorinated polyethylene (CPE) material, providing the outermost mechanical protection against environmental abrasion, chemical corrosion, and high and low temperatures.

[0035] One end of the through-hole 624 is not connected to the adhesion cavity 621 in the initial state, and the other end of the through-hole 624 is not connected to the flow cavity 64 in the initial state. This design avoids the penetration of viscous fluid during cable installation.

[0036] An elastic arc plate 65 is fixedly connected to the outer side of the partition strip 63. The arc surface of the elastic arc plate 65 abuts against the inner side of the stress detection sub-layer 7. The design of the elastic arc plate 65 can reflect the moisture condition inside the cable body through its own compression protrusion and concavity deformation.

[0037] Multiple metal struts 62 are arranged in a circumferential array on the circumferential surface of the elastic sleeve 61. This design ensures effective support and adequate adhesive penetration.

[0038] The coolant chamber 511 has seals at both ends. The seals prevent coolant leakage.

[0039] Working principle: When assembling cables, after sequentially installing the composite inner insulation layer 2, high-efficiency single shielding layer 3, shielding protection layer 4, water-blocking filling layer 5, stress detection layer 6, stress detection sub-layer 7, and cable sheath 8, the thread roller 623 can be rotated from one end of the cable body. This causes the two ends of the through-hole 624 to overlap with the flow cavity 64 and the crescent-shaped notch 622, respectively. This allows the adhesive inside the adhesion cavity 621 to flow out from the crescent-shaped notch 622, through the through-hole 624 and the flow cavity 64, and into the water-blocking filling layer. This ensures that the spiral skeleton 51 and water-absorbing shrinkable foam 52 inside the water-blocking filling layer 5 can stably adhere to the stress detection layer 6. When the inside of the cable body becomes damp, the permeating water will pass through the water-blocking filling layer 5 and be absorbed by the water. The water-absorbing and shrinking foam 52 absorbs the permeated water and shrinks itself. After shrinking, the water-absorbing and shrinking foam 52 adheres to the stress detection layer 6, causing the elastic soft sleeve 61 in the stress detection layer 6 to shrink as well. The shrinkage of the elastic soft sleeve 61 causes the partition strip 63 and the elastic arc sheet 65 to shrink synchronously. After shrinking, the elastic arc sheet 65 changes from a convex state to a concave state, which in turn causes the stress detection sub-layer 7 connected to it to sink synchronously. The sinking of the stress detection sub-layer 7 causes the cable sheath 8 to sink synchronously. After the cable sheath 8 sinks, the surface of the cable body sinks. With long-term use, the degree of sinking on the surface of the cable body can reflect the moisture status inside the cable, so that it can be replaced regularly, and the detection accuracy is higher.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A moisture-proof, high-efficiency single-shielded transmission control cable, comprising a multi-strand stranded conductive core (1), characterized in that: The multi-strand stranded conductive core (1) is provided with a composite inner insulation layer (2) on the outside, a high-efficiency single shielding layer (3) is provided on the outside of the composite inner insulation layer (2), a shielding protection layer (4) is provided on the outside of the high-efficiency single shielding layer (3), and a water-blocking filling layer (5) is provided on the outside of the shielding protection layer (4). The water-blocking filling layer (5) includes a spiral skeleton (51) and water-absorbing shrink foam (52). The spiral skeleton (51) and water-absorbing shrink foam (52) are spirally distributed and bonded to the outer surface of the water-blocking filling layer (5) to absorb infiltrated water. The spiral skeleton (51) has a coolant cavity (511) inside for filling with heat dissipation coolant. The water-blocking filling layer (5) is further provided with a stress detection layer (6) on the outside. The stress detection layer (6) includes an elastic soft sleeve (61). A metal support rod (62) is fixedly connected to the surface of the elastic soft sleeve (61). A partition strip (63) passes through one end of the metal support rod (62). The partition strip (63) is adhered to the circumferential surface of the elastic soft sleeve (61). A flow cavity (64) is opened on the outside of the elastic soft sleeve (61).

2. The moisture-proof, high-efficiency single-shielded transmission and control cable according to claim 1, characterized in that: The metal strut (62) includes an adhesive cavity (621) inside. The adhesive cavity (621) is located inside the metal strut (62) and is used to store adhesive. One end of the adhesive cavity (621) has a crescent-shaped notch (622) for the adhesive to penetrate. One end of the crescent-shaped notch (622) is rotatably connected to a rotating thread (623). The outer side of the rotating thread (623) has a through-hole (624).

3. The moisture-proof, high-efficiency single-shielded transmission control cable according to claim 2, characterized in that: The stress detection sub-layer (7) is provided on the outside of the stress detection sub-layer (6), and the cable sheath (8) is provided on the outside of the stress detection sub-layer (7).

4. The moisture-proof, high-efficiency single-shielded transmission control cable according to claim 3, characterized in that: One end of the through-hole (624) is not connected to the adhesion cavity (621) in the initial state, and the other end of the through-hole (624) is not connected to the flow cavity (64) in the initial state.

5. The moisture-proof, high-efficiency single-shielded transmission control cable according to claim 4, characterized in that: An elastic arc plate (65) is fixedly connected to the outer side of the partition strip (63), and the arc surface of the elastic arc plate (65) abuts against the inner side of the stress detection sub-layer (7).

6. The moisture-proof, high-efficiency single-shielded transmission control cable according to claim 5, characterized in that: The number of metal struts (62) is set to be multiple, and they are arranged in a circumferential array on the circumferential surface of the elastic sleeve (61).

7. The moisture-proof, high-efficiency single-shielded transmission control cable according to claim 6, characterized in that: The coolant chamber (511) has seals at both ends.

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