Insulated cable end protective sleeve with high sealing performance

Abstract

The utility model relates to the technical field of cable end protective sleeves, and discloses a high-sealing insulated cable end protective sleeve, which comprises fixing rings for contraction and fixation, connecting rings are fixedly connected to the opposite ends of the fixing rings, adjusting rings are rotatably connected to the opposite ends of the connecting rings, and the adjusting rings are rotatably connected to the fixing rings. The inner wall of the adjusting ring is connected with a transmission screw rod through a gear set, the opposite ends of the fixing rings are fixedly connected with a plurality of sliding groove pipes, the outer wall of the transmission screw rod is connected with a supporting plate through a supporting set, the sheath body is used for preventing corrosion, and the outermost layer of the sheath body is provided with a perfluoroether rubber protection layer. And a ceramic silicone rubber flame-retardant layer is arranged on the inner side of the perfluoroether rubber protective layer. According to the utility model, firm fixation of the sheath body between cable ends is ensured, loosening or falling in the use process is prevented, and extreme environment tolerance, uniform stress distribution, heat management optimization and protection reliability improvement are realized.

Description

Technical Field

[0001] This utility model relates to the technical field of cable end protection sleeves, and in particular to a high-sealing insulated cable end protection sleeve. Background Technology

[0002] Cable terminations are critical components of power systems and face numerous challenges during operation. Environmentally, they are greatly affected by humidity, chemical corrosion, and temperature changes; mechanically, they are easily damaged by external impacts and vibrations. Traditional protection methods, such as tape wrapping and ordinary plastic protective sleeves, have limitations such as poor sealing, low durability, and insufficient insulation. To solve these problems, ensure the safety and stability of power systems, reduce operation and maintenance costs, and extend cable life, high-sealing insulated cable termination protective sleeves have emerged using special materials and advanced technology.

[0003] Currently, the protective sleeves widely used in the market have revealed obvious drawbacks in actual use. On the one hand, the existing protective sleeves are relatively thin, which directly leads to poor insulation effect on internal pipes, resulting in a large waste of energy and potentially affecting the properties of materials or the stability of processes due to temperature changes. On the other hand, these protective sleeves are also inconvenient to install and remove, which greatly increases the time and labor costs for installation and maintenance, and affects work efficiency.

[0004] In response to this technical problem, this application proposes a highly sealing insulated cable end protective sleeve. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a highly sealed insulated cable end protective sleeve. This sleeve ensures the secure fixation of the sleeve body between the cable ends, preventing loosening or detachment during use. It also achieves extreme environmental tolerance, uniform stress distribution, and optimized thermal management, thereby improving the reliability of protection.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-sealing insulation cable end protection sleeve includes a fixing ring for shrinkage and fixing, a connecting ring fixedly connected to one end of each fixing ring, an adjusting ring rotatably connected to one end of each connecting ring, a transmission screw connected to the inner wall of the adjusting ring via a gear set, a plurality of sliding groove tubes fixedly connected to one end of each fixing ring, and a support plate connected to the outer wall of the transmission screw via a support set.

[0008] As a protective sleeve body for corrosion protection, the outermost layer of the protective sleeve body is provided with a perfluoroether rubber protective layer, the inner side of the perfluoroether rubber protective layer is provided with a ceramicized silicone rubber flame retardant layer, and the inner side of the ceramicized silicone rubber flame retardant layer is provided with a load-bearing insulating layer.

[0009] Furthermore, the gear set includes an internal gear ring fixedly connected to the inner wall of the adjusting ring, and a transmission gear fixedly connected to one end of each of the opposite ends of the transmission screw, wherein the internal gear ring and the transmission gear are meshed together.

[0010] Furthermore, the support assembly includes connecting rods that are rotatably connected to both the front and rear sides of the outer wall of the opposite end of the transmission screw, and the connecting rods are rotatably connected to the outer wall of the opposite end of the support plate at opposite ends.

[0011] Furthermore, each of the opposite ends of the transmission screw has a moving block threadedly connected to its outer wall, and each moving block has a support rod rotatably connected to its opposite end. The support rod is rotatably connected to the opposite end of the support plate.

[0012] Furthermore, the outer wall thickness of the perfluoroether rubber protective layer is 5 mm, and the outer wall thickness of the ceramicized silicone rubber flame retardant layer is 4 mm.

[0013] Furthermore, a titanium alloy pressing layer is provided on the inner side of the load-bearing insulation layer, and the outer wall thickness and diameter of both the load-bearing insulation layer and the titanium alloy pressing layer are 3mm.

[0014] Furthermore, a graphene-modified silicone grease layer is provided on the inner side of the titanium alloy pressing layer, and the outer wall thickness and diameter of both the titanium alloy pressing layer and the graphene-modified silicone grease layer are 5 mm.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the support plate is contracted inward by adjusting the ring, thereby squeezing the sheath body so that it can fit more tightly between the cable ends, ensuring that the sheath body is firmly fixed between the cable ends, preventing loosening or falling off during use, and keeping the sheath body stable during installation and use, so that it will not shift or deform due to external factors.

[0017] 2. In this utility model, the perfluoroether rubber layer is formed by two-stage vulcanization, the ceramicized silicone rubber layer forms cordierite ceramic with low porosity after being exposed to fire, the load-bearing insulation layer has high strength after fatigue resistance, the titanium alloy layer has spiral grooves to reduce stress standard deviation, and the graphene silicone grease layer forms a uniform coating with low thermal resistance. It comprehensively achieves extreme environment tolerance, uniform stress distribution and optimized thermal management, thus improving the reliability of protection. Attached Figure Description

[0018] Figure 1 This is a perspective view of a highly sealed insulated cable end protective sleeve proposed in this utility model;

[0019] Figure 2 This is a half-sectional view of the connecting ring of a high-sealing insulated cable end protective sleeve proposed in this utility model;

[0020] Figure 3 This is a half-sectional view of the adjusting ring of a high-sealing insulated cable end protective sleeve proposed in this utility model;

[0021] Figure 4 This is a cross-sectional view of the sheath body of a high-sealing insulated cable end protective sleeve proposed in this utility model.

[0022] Legend:

[0023] 1. Sheath body; 2. Fixing ring; 3. Connecting ring; 4. Adjusting ring; 5. Slide tube; 6. Internal gear ring; 7. Transmission gear; 8. Transmission screw; 9. Moving block; 10. Support rod; 11. Connecting rod; 12. Support plate; 13. Perfluoroether rubber protective layer; 14. Ceramicized silicone rubber flame retardant layer; 15. Load-bearing insulation layer; 16. Titanium alloy pressing layer; 17. Graphene modified silicone grease layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-3 This utility model provides an embodiment of a high-sealing insulated cable end protective sleeve, comprising: a fixing ring 2 for shrinkage and fixing; a connecting ring 3 fixedly connected to one end of the fixing ring 2; an adjusting ring 4 rotatably connected to one end of the connecting ring 3; an internal toothed ring 6 fixedly connected to the inner wall of the adjusting ring 4; a transmission screw 8 fixedly connected to one end of the transmission screw 8 with a transmission gear 7; the internal toothed ring 6 and the transmission gear 7 are meshed; a plurality of sliding groove tubes 5 fixedly connected to one end of the fixing ring 2; a connecting rod 11 rotatably connected to both the front and rear sides of the outer wall of one end of the transmission screw 8; the connecting rod 11 rotatably connected to the outer wall of one end of the support plate 12; a moving block 9 threadedly connected to the outer wall of one end of the transmission screw 8; a support rod 10 rotatably connected to one end of the moving block 9; and the support rod 10 rotatably connected to one end of the support plate 12.

[0026] Specifically: When installing the sheath body 1 at the cable end, the operator rotates the adjusting ring 4 clockwise, driving the internal gear ring 6 to form a precision meshing transmission with the transmission gear 7. The rotation of the transmission gear 7 drives the transmission screw 8 to rotate axially, causing the moving block 9 to translate 18-22mm along the screw axis. The linear motion of the moving block 9 is linked to the connecting rod 11 in the slide tube 5 through the support rod 10, forming a four-bar linkage mechanism. This forces the four sets of support plates 12 to move radially inward synchronously at a contraction rate of 0.8-1.2mm / s, ultimately forming... With a shrinking inner diameter of Φ58±0.5mm, the linkage mechanism can apply a uniform extrusion force of 12-15MPa to the sheath body 1 under an operating torque of 3.5N·m, so that the wall thickness compression rate of the sheath body 1 is stabilized in the range of 18%-22%, achieving a precise interference fit with the cable end. This process is doubly guaranteed by the limiting guide groove of the slide tube 5 and the self-locking thread of the transmission screw 8, ensuring that the repeatability of the shrinking sheath body 1 at the pipe interface is improved, and the axial tensile force is higher than 800N.

[0027] Reference Figure 4 As a protective sleeve body 1 for corrosion protection, the outermost layer of the protective sleeve body 1 is provided with a perfluoroether rubber protective layer 13, the inner side of the perfluoroether rubber protective layer 13 is provided with a ceramicized silicone rubber flame retardant layer 14, the inner side of the ceramicized silicone rubber flame retardant layer 14 is provided with a load-bearing insulating layer 15, the outer wall thickness of the perfluoroether rubber protective layer 13 is 5mm, the outer wall thickness of the ceramicized silicone rubber flame retardant layer 14 is 4mm, the inner side of the load-bearing insulating layer 15 is provided with a titanium alloy pressing layer 16, the outer wall thickness of both the load-bearing insulating layer 15 and the titanium alloy pressing layer 16 is 3mm, the inner side of the titanium alloy pressing layer 16 is provided with a graphene modified silicone grease layer 17, the outer wall thickness of both the titanium alloy pressing layer 16 and the graphene modified silicone grease layer 17 is 5mm.

[0028] Specifically: In the multi-layer composite protective structure, the perfluoroether rubber protective layer 13 serves as the outermost protective layer. It is molded using a two-stage vulcanization process, with a glass transition temperature of -57℃ and a compression set of less than 18% at 327℃, enabling continuous effective sealing for 5000 hours under DBA conditions in nuclear power plants. The ceramicized silicone rubber flame-retardant layer 14 has a limiting oxygen index of 48%. Within 3 minutes of exposure to an open flame at 600℃, it forms a cordierite ceramic layer with a porosity of less than 15% and a flexural strength greater than 8MPa, achieving 120 minutes of fireproof isolation. The load-bearing insulation layer 15 is made of aramid fiber-reinforced PEEK composite material, processed through a 10-stage molding process. 7The strength retention rate after fatigue testing with a subaxial ±5mm amplitude is greater than 95%. The titanium alloy crimping layer 16 features a 30° spiral groove design with a gradient depth of 0.8-1.2mm. Finite element analysis verifies that this reduces the standard deviation of axial crimping stress from 23.4MPa to 5.7MPa, and achieves precise matching of the thermal expansion coefficient with the cable's metal components. The graphene-modified silicone grease layer 17 has a thixotropic index of 4.3 and can form a uniform coating of 80±5μm under a scraping pressure of 0.3MPa. After curing, the interfacial thermal resistance is <0.15K·cm. 2 / W, with no phase change precipitation in the temperature range of -50℃ to 250℃, comprehensively improves the protection reliability of the sheath body 1 to the cable ends.

[0029] Working principle: When the sheath body 1 is fitted onto the end between the cables, rotating the adjusting ring 4 causes the internal gear ring 6 to drive the transmission gear 7 to rotate, which in turn drives the transmission screw 8 to rotate. This causes the moving block 9 to drive the support rod 10, which, in conjunction with the connecting rod 11 at the sliding tube 5, causes the support plate 12 to retract inward. This allows the support plate 12 to press against the sheath body 1, making the sheath body 1 fit snugly against the end between the cables. This facilitates the sheath body 1 retracting into the pipe, while the perfluoroether rubber protective layer 1... 3. As the outermost protective layer, it adopts a molding process and can work continuously from -50℃ to 327℃. The ceramicized silicone rubber flame retardant layer 14 has a high limiting oxygen index, the load-bearing insulation layer 15 has high tensile strength and good fatigue resistance, the titanium alloy crimping layer 16 adopts a gradient groove design to achieve uniform distribution of axial crimping force and avoid local stress concentration, and the graphene modified silicone grease layer 17 has a thixotropic index of 4.3 to ensure good coating during construction and no dripping after standing, thereby improving the protection effect of the sheath body 1 between the cable ends.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-sealing insulated cable end protective sleeve, comprising, characterized in that: As a fixed ring (2) for shrinkage and fixation, a connecting ring (3) is fixedly connected to the opposite end of the fixed ring (2), and an adjusting ring (4) is rotatably connected to the opposite end of the connecting ring (3). The inner wall of the adjusting ring (4) is connected to a transmission screw (8) through a gear set. A number of sliding groove tubes (5) are fixedly connected to the opposite end of the fixed ring (2). The outer wall of the transmission screw (8) is connected to a support plate (12) through a support set. As a protective sleeve body (1) for corrosion protection, the outermost layer of the protective sleeve body (1) is provided with a perfluoroether rubber protective layer (13), the inner side of the perfluoroether rubber protective layer (13) is provided with a ceramicized silicone rubber flame retardant layer (14), and the inner side of the ceramicized silicone rubber flame retardant layer (14) is provided with a load-bearing insulation layer (15).

2. The high-sealing insulation cable end protection sleeve according to claim 1, characterized in that: The gear set includes an internal gear ring (6) fixedly connected to the inner wall of the adjusting ring (4), and a transmission gear (7) fixedly connected to the opposite end of the transmission screw (8). The internal gear ring (6) and the transmission gear (7) are meshed together.

3. The high-sealing insulation cable end protection sleeve according to claim 1, characterized in that: The support assembly includes a connecting rod (11) that is rotatably connected to both the front and rear sides of the outer wall of the opposite end of the transmission screw (8). The connecting rod (11) is rotatably connected to the outer wall of the opposite end of the support plate (12) at one end.

4. The high-sealing insulation cable end protection sleeve according to claim 1, characterized in that: The outer wall of the opposite end of the transmission screw (8) is threaded with a moving block (9), and the opposite end of the moving block (9) is rotatably connected with a support rod (10). The opposite end of the support rod (10) is rotatably connected to the opposite end of the support plate (12).

5. A high-sealing insulated cable end protective sleeve according to claim 1, characterized in that: The outer wall thickness of the perfluoroether rubber protective layer (13) is 5 mm, and the outer wall thickness of the ceramicized silicone rubber flame retardant layer (14) is 4 mm.

6. The high-sealing insulation cable end protection sleeve according to claim 1, characterized in that: A titanium alloy pressing layer (16) is provided on the inner side of the load-bearing insulation layer (15), and the outer wall thickness and diameter of the load-bearing insulation layer (15) and the titanium alloy pressing layer (16) are both 3 mm.

7. A high-sealing insulated cable end protective sleeve according to claim 6, characterized in that: A graphene-modified silicone grease layer (17) is provided on the inner side of the titanium alloy pressing layer (16), and the outer wall thickness and diameter of both the titanium alloy pressing layer (16) and the graphene-modified silicone grease layer (17) are 5 mm.

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