Telescopic compression-resistant modified polypropylene power cable pipe protective sleeve

Abstract

The utility model discloses a telescopic compression-resistant modified polypropylene power cable pipe protective sleeve, which comprises a straight sleeve and a corrugated telescopic sleeve assembly, the corrugated telescopic sleeve assembly comprises a corrugated telescopic pipe, a triangular support plate, a connecting ring and a rotating joint, the triangular support plate is fixedly connected to the outer side of the corrugated telescopic pipe, and the connecting ring is fixedly connected to the outer side of the corrugated telescopic pipe. The number of the connecting rings and the number of the rotating joints are both two, the two connecting rings are fixedly connected to the two ends of the corrugated telescopic pipe correspondingly, and the two rotating joints are arranged on one sides of the two connecting rings correspondingly. According to the utility model, the plurality of triangular supporting plates which are distributed in the linear array are arranged on the outer side of the corrugated telescopic pipe, the supporting plates adopt the design of regular triangular sections, and the distance between the edge centers of the supporting plates is greater than the corrugated outer radius of the corrugated telescopic pipe, so that when the protective sleeve is extruded or impacted by the outside, the triangular supporting plates can effectively bear and disperse the forces; deformation or damage of the corrugated telescopic pipe is avoided, and continuous protection of the cable is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cable protective sleeves, in particular to a retractable compression-resistant modified polypropylene power cable pipe protective sleeve. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They play an important role in the power system, especially in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. A protective sheath is set on the outside of the cable to protect and seal the cable. Especially in high-voltage cables, the protective sheath can prevent the cable from being corroded by external factors such as moisture, corrosive substances, and termites, ensuring the integrity of the internal structure of the cable, which is conducive to improving the life of the cable and its ability to cope with complex environments, and ensuring the safe and stable operation of the cable.

[0003] Some existing cable protective sleeves are provided with a corrugated tube structure when in use. Although this structure can provide a certain degree of elasticity, when subjected to external extrusion or impact, since no additional reinforcement structure is provided on the outside of this structure, when subjected to strong external pressure, this corrugated tube structure may not be able to effectively support and transmit these pressures, thereby causing the cable inside the sleeve to be squeezed or damaged.

[0004] For example, a flexible and tensile-resistant cable protection metal sleeve disclosed in the announcement number CN217388107U has an adjustment component located between two protection components. The two telescopic parts on the adjustment component can reciprocate and retract on the connecting part to adjust the distance between two adjacent protection components. At the same time, the tensile resistance of the equipment is improved by the telescopic distance of the telescopic parts on the connecting part, which solves the problem of poor flexibility of the existing metal sleeve, resulting in low tensile resistance of the protective sleeve.

[0005] The patented cable protective metal sheath takes into account the tensile strength and flexibility of the cable in its design and function, but there are still some areas that need to be optimized in the outer structure of the protective sheath. The protective sheath is a corrugated tube structure. Although this structure can provide a certain degree of elasticity, when subjected to external extrusion or impact, since there is no reinforcement structure on the outside of the protective sheath, when subjected to strong external pressure, the protective sheath may not be able to effectively support and transmit these pressures, thereby causing the cable inside the sheath to be squeezed or damaged.

[0006] Therefore, it is necessary to invent a retractable compression-resistant modified polypropylene power cable pipe protective cover to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a retractable compression-resistant modified polypropylene power cable pipe protective cover to solve the above-mentioned technical problems.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a retractable pressure-resistant modified polypropylene power cable pipe protective cover, comprising a straight sleeve and a corrugated telescopic sleeve assembly, the corrugated telescopic sleeve assembly comprising a corrugated telescopic tube, a triangular support plate, a connecting ring and a rotating joint, the triangular support plate is fixedly connected to the outside of the corrugated telescopic tube, the number of the connecting rings and the rotating joints are both set to two, the two connecting rings are respectively fixedly connected to the two ends of the corrugated telescopic tube, the two rotating joints are respectively arranged on one side of the two connecting rings, an annular groove is opened on one side of the connecting ring, one end of the rotating joint extends to the inside of the annular groove, and the end surface of the rotating joint extending to the inside of the annular groove is fixedly connected to an annular slider, and the annular slider is rotatably connected to the annular groove.

[0009] The design of the corrugated expansion sleeve assembly makes the power cable pipe protective sleeve expandable and can adapt to cables of different lengths and shapes, increasing the flexibility and applicability of use.

[0010] Preferably, the number of the triangular support plates is set to be multiple, the multiple triangular support plates are distributed in a linear array, and the multiple triangular support plates are respectively arranged between two adjacent corrugations on the surface of the corrugated telescopic tube.

[0011] The triangular support plates are arranged on the surface of the bellows in a linear array, which can effectively enhance the compressive resistance of the bellows and prevent the bellows from being deformed or damaged when subjected to external pressure.

[0012] Preferably, the cross-sectional shape of the triangular support plate is an equilateral triangle, and the edge-center distance of the triangular support plate is greater than the corrugation outer radius of the corrugated expansion tube.

[0013] The triangular support plate adopts a regular triangle cross-section design, and its side-center distance is larger than the corrugated outer radius of the corrugated expansion tube. This design enables the triangular support plate to come into contact with foreign objects one step earlier than the corrugated expansion tube, thereby preventing the corrugated expansion tube from being squeezed.

[0014] Preferably, a handle is fixedly connected to the surface of the rotary joint, the number of the handles is set to four, and the four handles are evenly arranged around the surface of the rotary joint.

[0015] The handle design on the swivel joint is easy for users to operate, convenient for users to install and remove the protective cover, and improves work efficiency.

[0016] Preferably, inner walls at both ends of the straight sleeve are provided with internal threads, and an end surface of the rotary joint away from the connecting ring is provided with external threads, and the external threads match the internal threads.

[0017] Preferably, one end of the rotary joint extends into the interior of the straight sleeve and is threadedly connected to the inner wall of the straight sleeve.

[0018] The swivel joint is connected to the straight sleeve through threads, which not only ensures a firm connection, but also facilitates the adjustment and extension of the length of the protective sleeve to meet the protection requirements of different cables.

[0019] Preferably, a rubber sealing ring is provided at the joint between the rotary joint and the straight sleeve, and the cross-sectional shape of the rubber sealing ring is T-shaped.

[0020] The provision of the rubber sealing ring enhances the sealing performance at the joint between the rotary joint and the straight sleeve, prevents the entry of foreign matter such as water and dust, and protects the threaded structure from erosion.

[0021] Preferably, one end of the rubber sealing ring is sleeved with the straight sleeve, and the other end of the rubber sealing ring is sleeved with the rotary joint.

[0022] The rubber sealing ring adopts a T-shaped cross-section design, which can better fit with the straight sleeve and the rotary joint to provide a stable sealing effect.

[0023] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0024] 1. A plurality of triangular support plates distributed in a linear array are arranged on the outside of the corrugated expansion tube. These support plates are designed with a regular triangle cross-section, and their edge-center distance is greater than the corrugated outer radius of the corrugated expansion tube. When the protective cover is subjected to external extrusion or impact, the triangular support plates can effectively withstand and disperse these forces, avoiding deformation or damage of the corrugated expansion tube, and ensuring continuous protection of the cable;

[0025] 2. Through the design of the rotating joint and the connecting ring, the quick assembly and disassembly between the straight sleeve and the corrugated telescopic sleeve assembly is realized. The user only needs to rotate the handle to screw the rotating joint into the straight sleeve, and use the rubber sealing ring to ensure the sealing effect at the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is the structural explosion diagram of the utility model;

[0028] Figure 3 It is a structural sectional view of the utility model;

[0029] Figure 4 For this utility model Figure 3 A magnified view of the structure of part A;

[0030] Figure 5 It is a structural explosion diagram of the corrugated expansion sleeve assembly of the utility model.

[0031] Description of reference numerals:

[0032] 1. Straight sleeve; 2. Corrugated expansion tube; 3. Triangular support plate; 4. Connecting ring; 5. Rotary joint; 6. Annular slide groove; 7. Annular slider; 8. Handle; 9. Rubber sealing ring. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The utility model provides Figure 1-5 A retractable pressure-resistant modified polypropylene power cable pipe protective cover shown in the figure includes a straight sleeve 1 and a corrugated telescopic sleeve assembly, the corrugated telescopic sleeve assembly includes a corrugated telescopic tube 2, a triangular support plate 3, a connecting ring 4 and a rotating joint 5, the triangular support plate 3 is fixedly connected to the outside of the corrugated telescopic tube 2, the number of the connecting ring 4 and the rotating joint 5 are both set to two, the two connecting rings 4 are respectively fixedly connected to the two ends of the corrugated telescopic tube 2, the two rotating joints 5 are respectively arranged on one side of the two connecting rings 4, an annular groove 6 is opened on one side of the connecting ring 4, one end of the rotating joint 5 extends to the inside of the annular groove 6, and an annular slider 7 is fixedly connected to the surface of one end of the rotating joint 5 extending to the inside of the annular groove 6, and the annular slider 7 is rotatably connected to the annular groove 6.

[0035] In one aspect of the present embodiment, the number of triangular support plates 3 is set to multiple, and the multiple triangular support plates 3 are distributed in a linear array. The multiple triangular support plates 3 are respectively arranged between two adjacent corrugations on the surface of the corrugated expansion tube 2. The cross-sectional shape of the triangular support plate 3 is an equilateral triangle. The edge center distance of the triangular support plate 3 is greater than the outer radius of the corrugation of the corrugated expansion tube 2. A handle 8 is fixedly connected to the surface of the rotary joint 5. The number of handles 8 is set to four. The four handles 8 are evenly arranged around the surface of the rotary joint 5. Internal threads are provided on the inner walls of both ends of the straight sleeve 1. An external thread is provided on the surface of one end of the rotary joint 5 away from the connecting ring 4, and the external thread matches the internal thread. One end of the rotary joint 5 extends to the inside of the straight sleeve 1 and is threadedly connected to the inner wall of the straight sleeve 1. A rubber sealing ring 9 is provided at the joint between the rotary joint 5 and the straight sleeve 1. The cross-sectional shape of the rubber sealing ring 9 is T-shaped. One end of the rubber sealing ring 9 is sleeved with the straight sleeve 1, and the other end of the rubber sealing ring 9 is sleeved with the rotary joint 5.

[0036] Working principle of this utility model:

[0037] Refer to the instruction manual Figure 1-5When using the utility model, firstly, a plurality of straight sleeves 1 and corrugated telescopic sleeve assemblies are alternately sleeved on the outside of the cable, and the rotary joint 5 is rotated by the handle 8 so that one end of the rotary joint 5 extends into the inside of the straight sleeve 1 and is threadedly connected with the inner wall of the straight sleeve 1, and the plurality of straight sleeves 1 and the corrugated telescopic sleeve assemblies are assembled into a long protective sleeve by the rotary joint 5, and the rubber sealing ring 9 is sleeved on the joint between the straight sleeve 1 and the rotary joint 5 to ensure the sealing effect. Since the main body of the corrugated telescopic sleeve assembly is the corrugated telescopic tube 2, the protective sleeve has certain elasticity and bendability, and a triangular support plate 3 is arranged between the corrugations of the corrugated telescopic tube, which is used to withstand external extrusion and impact, so as to avoid deformation or damage of the corrugated telescopic tube 2, and can maintain the protective effect of the corrugated telescopic tube 2 on the cable.

Claims

1. A retractable compression-resistant modified polypropylene power cable pipe protective cover, comprising a straight sleeve (1) and a corrugated telescopic sleeve assembly, characterized in that: The bellows telescopic sleeve assembly comprises a bellows telescopic tube (2), a triangular support plate (3), a connecting ring (4) and a rotating joint (5). The triangular support plate (3) is fixedly connected to the outside of the bellows telescopic tube (2). The connecting ring (4) and the rotating joint (5) are both provided in two numbers. The two connecting rings (4) are respectively fixedly connected to the two ends of the bellows telescopic tube (2). The two rotating joints (5) are respectively arranged on one side of the two connecting rings (4). An annular groove (6) is provided on one side of the connecting ring (4). One end of the rotating joint (5) extends into the inside of the annular groove (6). An annular slider (7) is fixedly connected to the surface of one end of the rotating joint (5) extending into the inside of the annular groove (6). The annular slider (7) is rotatably connected to the annular groove (6).

2. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: The number of the triangular support plates (3) is set to be multiple, the multiple triangular support plates (3) are distributed in a linear array, and the multiple triangular support plates (3) are respectively arranged between two adjacent corrugations on the surface of the corrugated telescopic tube (2).

3. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: The cross-sectional shape of the triangular support plate (3) is an equilateral triangle, and the apicocenter distance of the triangular support plate (3) is greater than the corrugation outer radius of the corrugated telescopic tube (2).

4. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: A handle (8) is fixedly connected to the surface of the rotary joint (5), and the number of the handles (8) is set to four, and the four handles (8) are evenly arranged around the surface of the rotary joint (5).

5. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: Internal threads are provided on the inner walls of both ends of the straight sleeve (1), and external threads are provided on the surface of one end of the rotary joint (5) away from the connecting ring (4), and the external threads match the internal threads.

6. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: One end of the rotary joint (5) extends into the interior of the straight sleeve (1) and is threadedly connected to the inner wall of the straight sleeve (1).

7. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 1, characterized in that: A rubber sealing ring (9) is provided at the joint between the rotary joint (5) and the straight sleeve (1), and the cross-sectional shape of the rubber sealing ring (9) is T-shaped.

8. The retractable compression-resistant modified polypropylene power cable pipe protective cover according to claim 7, characterized in that: One end of the rubber sealing ring (9) is sleeved with the straight sleeve (1), and the other end of the rubber sealing ring (9) is sleeved with the rotary joint (5).

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