A multi-layer shielded electrical cable protection sleeve

Abstract

The application relates to the technical field of electrical cable protective sleeves, in particular to a multilayer shielding electrical cable protective sleeve, which comprises an electrical cable, the outer side wall of the electrical cable is adhered with a first shielding layer, the outer side wall of the first shielding layer is adhered with a second shielding layer, the outer side wall of the second shielding layer is adhered with a third shielding layer, the outer side wall of the third shielding layer is adhered with an outer protection assembly, and the outer side wall of the outer protection assembly is provided with a clamping assembly. The clamping assembly is arranged, so that the electrical cable of different diameters can be perfectly adapted, the locking force of the electrical cable of various specifications can be best and uniform, the damage of the cable or the protective sleeve itself caused by stress concentration can be avoided, the installation and the later maintenance operation are greatly simplified, the construction efficiency and reliability are improved, the full-band efficient shielding from low frequency to high frequency is realized through the three-layer composite shielding structure, and the shielding efficiency is much higher than that of the single-layer shielding structure.

Description

Technical Field

[0001] This application relates to the technical field of electrical cable protection sleeves, and in particular to a multi-layer shielded electrical cable protection sleeve. Background Technology

[0002] Shielded cables are cables that suppress electromagnetic interference in network transmission through a metal shielding layer. The insulation layer is reinforced with a protective sheath made of aluminum foil or copper braided mesh. The cable blocks external electromagnetic interference through the reflection, absorption effect and skin effect of the shielding layer, while preventing internal signals from leaking out. It needs to be grounded to form a complete circuit to achieve the best shielding performance. It is mainly used in high electromagnetic interference scenarios such as industrial control, data centers, and medical equipment.

[0003] A search revealed Chinese Patent Publication No. CN218481977U, which discloses a shielded electrical cable protective sleeve, including an outer sheath. The outer sheath is a hollow, rolled-up structure with openings at both ends along its axial direction. The outer sheath has opposing free edges extending along its axial direction, and these opposing free edges are rolled up radially along the outer sheath to partially overlap each other. This invention, after the protective sleeve self-rolls over the electrical cable, allows the self-locking tape to pass through the through-slot. Then, the latch on one side of the self-locking tape is pressed into the corresponding first or second locking slot, further securing the protective sleeve. This prevents the protective sleeve from loosening simply because it self-rolls over the electrical cable. Furthermore, the outer wall of the outer sheath is provided with a first and a second locking slot. By incorporating both the outer sheath and the shielding layer, this invention not only enables effective self-rolling of the outer sheath, ensuring a tight wrap around the electrical cable, but also provides excellent shielding through the internal shielding layer, guaranteeing that the electrical cable will not be interfered with by external signals during operation.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: While the self-locking assembly engages with a locking slot at a fixed position via a latch, this design provides two locking positions. However, its adaptability is still limited when there are slight differences in the diameter of electrical cables or when different locking forces are required. After locking, the engagement force between the latch and the locking slot is fixed and cannot be finely adjusted as needed. This may result in either excessive tightness, which could damage the electrical cable or its sheath, or excessive looseness, which could lead to unreliable fixation for certain specifications of electrical cables. Furthermore, although the single-layer copper wire braided shielding has good flexibility, its shielding effectiveness decreases at high frequencies due to the skin effect, and the presence of gaps in the shielding layer results in poor shielding against low-frequency magnetic fields. Utility Model Content

[0005] In order to solve the problems mentioned in the background art, this application provides a multi-layer shielded electrical cable protection sleeve.

[0006] This application provides a multi-layer shielded electrical cable protective sleeve, which adopts the following technical solution: it includes an electrical cable, characterized in that: a first shielding layer is adhered to the outer wall of the electrical cable, a second shielding layer is adhered to the outer wall of the first shielding layer, a third shielding layer is adhered to the outer wall of the second shielding layer, an outer protective component is adhered to the outer wall of the third shielding layer, and a clamping component is provided on the outer wall of the outer protective component.

[0007] Optionally, the outer protective component includes a fireproof layer, a rubber layer is adhered to the outer wall of the fireproof layer, and a wear-resistant layer is adhered to the outer wall of the rubber layer.

[0008] Optionally, the clamping assembly includes a sleeve and a threaded sleeve, both of which are fitted onto the outer side wall of the outer protective assembly. One end of the sleeve is fixedly connected to a plurality of elastic pressure plates, and the other end of the sleeve is fixedly connected to a limit plate.

[0009] Optionally, the first shielding layer is an aluminum foil strip or copper foil strip coated with conductive adhesive on one side.

[0010] Optionally, the second shielding layer is a braided layer made of tin-plated copper wire or copper alloy wire.

[0011] Optionally, the third shielding layer is a wrapping layer made of nickel strip or high-permeability alloy strip.

[0012] Optionally, the outer wall of the sleeve is provided with a threaded section, and the diameter of the hole at one end of the threaded sleeve gradually decreases, with the minimum hole diameter being slightly larger than the diameter of the outer protective assembly.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. By setting up a clamping component, this utility model can not only perfectly adapt to cables of different diameters, ensuring that electrical cables of various specifications can obtain the best and uniform locking force, avoiding stress concentration that could damage the cable or sheath itself, but also greatly simplify installation and subsequent maintenance operations, improving construction efficiency and reliability.

[0015] 2. By setting up components such as a first shielding layer, a second shielding layer, and a third shielding layer, this utility model achieves efficient shielding across the entire frequency band from low to high frequencies through a three-layer composite shielding structure, with shielding effectiveness far exceeding that of a single-layer shielding structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0017] Figure 2 This is a cross-sectional structural diagram of the clamping assembly in an embodiment of this application;

[0018] Figure 3 This is a front view of the overall structure in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the unfolded structure of the outer protective component in an embodiment of this application.

[0020] Reference numerals: 1. Electrical cable; 2. First shielding layer; 3. Second shielding layer; 4. Third shielding layer; 5. Outer protective assembly; 501. Fireproof layer; 502. Rubber layer; 503. Wear-resistant layer; 6. Clamping assembly; 601. Sleeve; 602. Threaded sleeve; 603. Elastic pressure plate; 604. Limiting plate; 605. Threaded section. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0022] This application discloses a multi-layer shielded electrical cable protective sleeve, such as... Figure 1 As shown, the device includes an electrical cable 1. A first shielding layer 2 is adhered to the outer wall of the electrical cable 1. The first shielding layer 2 is an aluminum foil or copper foil strip coated with conductive adhesive on one side. The main function of the first shielding layer 2 is to provide coverage shielding. Through the reflection and absorption effects of the metal foil, it forms the first electromagnetic shielding defense line, effectively suppressing high-frequency electromagnetic interference and radio frequency interference, and preventing internal signal energy leakage. The conductive adhesive on its surface ensures good electrical contact between the shielding layer and the cable or subsequent shielding layers. A second shielding layer 3 is adhered to the outer wall of the first shielding layer 2. The second shielding layer 3 is a braided layer made of tin-plated copper wire or copper alloy wire. The second shielding layer 3 wraps around the first shielding layer 2, further enhancing the overall shielding effectiveness, especially in the mid-to-high frequency bands, where the braided layer provides lower transfer impedance. This design significantly improves the flexibility and fatigue resistance of the shielding structure, allowing the cable to be repeatedly bent without damage. A third shielding layer 4 is adhered to the outer wall of the second shielding layer 3. The third shielding layer 4 is a wrapping layer made of nickel strip or high-permeability alloy strip, its core function being to provide low-frequency magnetic field shielding. For low-frequency magnetic field interference that is difficult to effectively suppress with traditional aluminum foil and copper braided mesh, the high-permeability nickel or alloy material can provide a low magnetic resistance path, confining the magnetic lines of force within itself, thereby protecting the internal electrical cable 1 from its influence. An outer sheath assembly 5 is adhered to the outer wall of the third shielding layer 4, and a clamping assembly 6 is provided on the outer wall of the outer sheath assembly 5. It should be noted that the electrical cable 1 has an extending nature in practical applications, so in actual installation, a clamping assembly 6 is usually installed at intervals. Figure 1 The diagram shown is only a schematic of one clamping component 6.

[0023] Please see Figure 2The clamping assembly 6 includes a sleeve 601 and a threaded sleeve 602. Both the sleeve 601 and the threaded sleeve 602 are fitted onto the outer wall of the outer protective assembly 5. The sleeve 601 is the main structure of the clamping assembly 6, and its threaded section 605 is used to mate with the threaded sleeve 602. The diameter of one end of the threaded sleeve 602 gradually decreases, and the minimum diameter is slightly larger than the diameter of the outer protective assembly 5. One end of the sleeve 601 is fixedly connected to multiple elastic pressure plates 603. When the elastic pressure plates 603 are subjected to axial compression, their inner diameter... It can shrink evenly and flexibly to avoid damage to the internal structure. The limiting plate 604 is fixed to the other end of the sleeve 601 and mainly plays a positioning and limiting role to prevent the threaded sleeve 602 from moving excessively when tightened. When the threaded sleeve 602 is screwed onto the threaded section 605 of the sleeve 601, its conical inner wall will continuously squeeze the elastic pressure plate 603, thereby realizing continuous and stepless adjustment of the locking force. This design enables the component to adapt to cables of different diameters and provide stable and reliable fixation to prevent the protective sleeve from loosening.

[0024] Please see Figure 3 as well as Figure 4 The outer sheath component 5 includes a fireproof layer 501, which is usually made of flame-retardant polymer materials such as polyvinyl chloride. Its main function is flame retardancy and fire resistance. When the electrical cable 1 is exposed to fire or high temperature, it can prevent the spread of flames and delay the burning. A rubber layer 502 is adhered to the outer wall of the fireproof layer 501. The rubber layer 502 provides cushioning, flexibility and sealing. It gives the protective sheath good elasticity, tensile and compressive strength and can adapt to certain deformations. At the same time, it enhances the overall airtightness and waterproofness. A wear-resistant layer 503 is adhered to the outer wall of the rubber layer 502. The wear-resistant layer 503 is made of high-strength and wear-resistant materials such as polyurethane and nylon. Its primary function is to resist external mechanical wear, scratches and impacts, protect all internal structures from damage, and thus extend the service life of the cable.

[0025] The implementation principle of a multi-layer shielded electrical cable protective sleeve in this application embodiment is as follows: After the electrical cable 1 and its protective sleeve are installed, one or more clamping components 6 can be set on its outer side wall according to its length. When the threaded sleeve 602 is screwed, the tapered structure at its front end will be pushed along the threaded section 605 on the sleeve 601, thereby uniformly squeezing multiple elastic pressure plates 603 from all sides. The elastic pressure plates 603 generate elastic deformation under radial pressure, and their inner diameter will continuously and smoothly shrink, thereby tightening evenly. This process realizes continuous and precise adjustment of the locking force, which can not only ensure that the protective sleeve is firmly locked on the electrical cable 1 and prevent loosening, but also avoid damaging the internal structure due to its flexible pressure distribution, and adapt to the fastening requirements of cables with different outer diameters.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-layer shielded electrical cable protective sleeve, comprising an electrical cable (1), characterized in that: The electrical cable (1) has a first shielding layer (2) attached to its outer wall, a second shielding layer (3) attached to its outer wall, a third shielding layer (4) attached to its outer wall, an outer protective assembly (5) attached to its outer wall, and a clamping assembly (6) provided on the outer wall of the outer protective assembly (5).

2. The multi-layer shielded electrical cable protective sleeve according to claim 1, characterized in that: The outer protective component (5) includes a fireproof layer (501), a rubber layer (502) is adhered to the outer wall of the fireproof layer (501), and a wear-resistant layer (503) is adhered to the outer wall of the rubber layer (502).

3. The multi-layer shielded electrical cable protective sleeve according to claim 2, characterized in that: The clamping assembly (6) includes a sleeve (601) and a threaded sleeve (602). Both the sleeve (601) and the threaded sleeve (602) are sleeved on the outer side wall of the outer protective assembly (5). One end of the sleeve (601) is fixedly connected to a plurality of elastic pressure plates (603), and the other end of the sleeve (601) is fixedly connected to a limiting plate (604).

4. The multi-layer shielded electrical cable protective sleeve according to claim 3, characterized in that: The first shielding layer (2) is an aluminum foil strip or copper foil strip coated with conductive adhesive on one side.

5. The multi-layer shielded electrical cable protective sleeve according to claim 4, characterized in that: The second shielding layer (3) is a braided layer made of tin-plated copper wire or copper alloy wire.

6. The multi-layer shielded electrical cable protective sleeve according to claim 1, characterized in that: The third shielding layer (4) is a wrapping layer made of nickel strip or high magnetic permeability alloy strip.

7. A multi-layer shielded electrical cable protective sleeve according to claim 5, characterized in that: The outer wall of the sleeve (601) is provided with a threaded section (605), and the diameter of the hole at one end of the threaded sleeve (602) gradually decreases, with the minimum hole diameter being slightly larger than the diameter of the outer protective assembly (5).

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