Sealing structure for cable and forming die thereof

Abstract

The utility model discloses a sealing structure for a cable and a forming die thereof, and aims to provide a sealing structure for sealing the connection part of the cable and a flange when the cable is connected with the flange and a forming die thereof, the key points of the technical scheme are that the sealing structure comprises a cable body, the cable body comprises a cable sheath and a cable inner core, a flange plate connected with a port of the cable body is arranged at the port of the cable body, the cable body penetrates out of a central circular hole of the flange plate, the cable body is provided with a sealing structure extending out of a cable sheath, and the sealing structure is used for sealing a gap between the cable body and the central circular hole of the flange plate. The sealing structure is formed by placing the cable body in a corresponding forming die and heating and melting the cable sheath. The sealing structure is suitable for the electronic and electrical field.

Description

Technical Field

[0001] This utility model relates to a sealing structure for cables, and more specifically, to a sealing structure and its molding die for sealing the connection part when a cable is connected to a flange. Background Technology

[0002] A cable is a transmission device that transmits electrical energy or signals, consisting of several or several groups of conductors and an outer insulation layer. The materials and specifications of cables vary depending on the application scenario, such as marine cables, mining cables, and submarine cables.

[0003] Currently, different processing techniques are used to seal cables depending on their material. Traditional vulcanization sealing is suitable for most cable materials, but for some cable materials that do not adhere to vulcanizing adhesive, this traditional process cannot achieve a sealing effect. For example, cross-linked polyethylene cables used in deep-sea communications require an alternative process to form a sealing structure. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing structure for cables and its molding die.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for cables and its forming mold, comprising a cable body, the cable body including a cable sheath and a cable core, a flange connected to the cable body at its port, the cable body passing through a central circular hole in the flange, the cable body having a sealing structure extending from the cable sheath, the sealing structure being used to seal the gap between the cable body and the central circular hole in the flange, the sealing structure being formed by placing the cable body in a corresponding forming mold and heating and melting the cable sheath.

[0006] By adopting the above technical solution, when the cable is connected to the flange, a gap will be generated between the connection parts. At this time, the cable can rely on the provided sealing structure to physically seal the gap, and further fix it by the bolt connection between the flanges to prevent water and other impurities from entering the cable.

[0007] The present invention is further configured such that the sealing structure includes a cylindrical portion extending from the cable sheath and a flat annular portion vertically connected to one end of the cylindrical portion away from the cable sheath.

[0008] By adopting the above technical solution, the sealing structure is divided into two parts. The cylindrical part is designed to fit with the central hole of the flange, so that the cable sheath can fit tightly with the central hole. The annular part allows the sealing structure to fit against the flange on the inner side of the flange, thereby comprehensively improving the sealing strength between the cable and the flange.

[0009] The present invention is further configured such that the thickness of the cylindrical portion is the same as the thickness of the annular portion.

[0010] By adopting the above technical solution, the equal thickness of the cylindrical part and the annular part ensures the overall strength of the sealing structure. If the thicknesses of these two parts are different, the strength of the connection between the two parts will be weakened when subjected to external force, and the service life of the sealing structure will be greatly reduced.

[0011] The present invention is further configured such that the sealing structure is made of the same material as the cable sheath, namely cross-linked polyethylene.

[0012] By adopting the above technical solution, the sealing structure is made of the same material as the cable sheath. The sealing structure is essentially formed by hot melting of the cable sheath. Cross-linked polyethylene, as a high-performance material, can withstand temperatures up to 90 degrees Celsius during long-term operation and even up to 250 degrees Celsius during instantaneous short-circuit temperatures. It also has high resistance to environmental stress cracking, high corrosion resistance, electrical properties, and other comprehensive properties, making it a suitable material for sealing structures.

[0013] The present invention is further configured such that: the forming mold for the sealing structure of the cable includes mold A, mold B and mold C, wherein during the forming of the sealing structure: mold C is used to insert between the cable sheath and the cable core to separate the cable sheath and the cable core, and molds A and B are used to fit over the cable sheath and form a cavity conforming to the shape of the sealing structure with mold C.

[0014] By adopting the above technical solution, the use of a special molding die for shaping the cable sealing structure can ensure the uniformity of product specifications. This process is also suitable for subsequent mass production. Mold C separates the cable sheath and the cable core for local processing without damaging the internal structure of the cable. Molds A and B are fitted over the cable sheath, and the cavity formed by Molds A, B, and C inside conforms to the shape of the sealing structure. The mold ensures the specifications when making the sealing structure.

[0015] The present invention is further configured such that molds A, B, and C are all made of metal.

[0016] By adopting the above technical solution, all three molds are made of materials with high melting points and good thermal conductivity. This is mainly to prevent the generation of excess impurities when shaping the sealing structure. Since the molds need to be continuously heated, their melting points must be higher than those of the sealing structure materials. In order to improve the efficiency of shaping and heat utilization, the thermal conductivity of the molds should also be considered. Overall, common metal molds are more suitable, while some alloys with good thermal stability and non-metallic materials can be used as alternatives. Attached Figure Description

[0017] Figure 1 This is a perspective view of an embodiment of the sealing structure of this utility model for cables;

[0018] Figure 2 This is a left view of an embodiment of the sealing structure of this utility model for cables;

[0019] Figure 3 This is a cross-sectional view of a mold used in an embodiment of the sealing structure of this utility model for cables;

[0020] The attached diagrams are labeled as follows: 1. Cable sheath; 2. Cable core; 3. Flange; 4. Sealing structure; 5. Circular part; 6. Cylindrical part; 7. Mold A; 8. Mold B; 9. Mold C; Detailed Implementation

[0021] Reference Figures 1 to 3 The following is a further description of an embodiment of the sealing structure of this utility model for cables.

[0022] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0024] A sealing structure for cables and its forming mold are disclosed. The cable body includes a cable sheath 1 and a cable core 2. A flange 3 is connected to the cable body at its port. The cable body passes through a central hole in the flange 3. A sealing structure 4 extends from the cable sheath 1 and seals the gap between the cable body and the central hole in the flange 3. The sealing structure 4 is formed by placing the cable body in a corresponding forming mold and heating and melting the cable sheath 1. By adopting this technical solution, when the cable is flanged to the flange, a gap will be generated between the connection points. The cable can then rely on the sealing structure 4 to physically seal this gap. Further fixation is achieved by bolts connecting the flanges 3, preventing water and other impurities from entering the cable.

[0025] Furthermore, the sealing structure 4 includes a cylindrical portion 6 extending from the cable sheath 1 and a flat annular portion 5 vertically connected to the end of the cylindrical portion 6 facing away from the cable sheath 1. By adopting the above technical solution, the sealing structure 4 is divided into two parts: the cylindrical portion 6 is designed to mate with the central hole of the flange 3, allowing the cable sheath 1 to fit tightly against the central hole; the annular portion 5 allows the sealing structure 4 to fit snugly against the flange 3 from the inside, thus comprehensively improving the sealing strength between the cable and the flange 3.

[0026] Furthermore, the thickness of the cylindrical portion 6 is the same as the thickness of the annular portion 5. By adopting the above technical solution, the equal thickness of the cylindrical portion 6 and the annular portion 5 ensures the overall strength of the sealing structure 4. If the thicknesses of these two portions are different, the strength at the connection point between the two portions will be weakened when subjected to external force, and the service life of the sealing structure 4 will be significantly reduced.

[0027] Furthermore, the sealing structure 4 is made of the same cross-linked polyethylene material as the cable sheath 1. By adopting the above technical solution, the sealing structure 4 is made of the same material as the cable sheath 1. Essentially, the sealing structure 4 is formed by the hot melting of the cable sheath 1. Cross-linked polyethylene, as a high-performance material, can withstand temperatures up to 90 degrees Celsius during long-term operation and even instantaneous short-circuit temperatures up to 250 degrees Celsius. It also possesses high resistance to environmental stress cracking, high corrosion resistance, and excellent electrical properties, making it a suitable material for the sealing structure 4.

[0028] Furthermore, the molding die for the cable sealing structure includes die A7, die B8, and die C9. During the shaping of the sealing structure 4: die C9 is inserted between the cable sheath 1 and the cable core 2 to separate them; die A7 and die B8 are fitted over the cable sheath 1 and form a cavity conforming to the shape of the sealing structure 4 with die C9. By adopting the above technical solution, using a dedicated molding die for shaping the cable sealing structure 4 ensures product specification uniformity, and this process is also suitable for subsequent mass production. Die C9 separates the cable sheath 1 and the cable core 2 for local processing without damaging the internal structure of the cable. Dies A7 and die B8 are fitted over the cable sheath 1, and the cavity formed by the three molds (die A7, die B8, and die C9) conforms to the shape of the sealing structure 4. The mold ensures the specifications are met when manufacturing the sealing structure 4.

[0029] Furthermore, molds A7, B8, and C9 are all made of metal. By adopting the above technical solution, the three molds are all made of materials with high melting points and good thermal conductivity. This is mainly to prevent the generation of excess impurities during the molding of the sealing structure 4. Since the molds need to be continuously heated, their melting points must be higher than those of the sealing structure 4 material. Furthermore, to improve molding efficiency and heat utilization, the thermal conductivity of the molds should also be considered. Overall, using common metal molds is more suitable, while certain alloys with good thermal stability and non-metallic materials can be considered as alternatives.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for a cable, comprising a cable body including a cable sheath (1) and a cable core (2), said cable body being provided with a flange (3) connected thereto, said cable body passing out of a central hole of the flange (3), characterized in that, The cable body is provided with a sealing structure (4) extending from the cable sheath (1), which is used to seal the gap between the cable body and the central hole of the flange (3), and is formed by placing the cable body in a corresponding mold and heating and melting the cable sheath (1).

2. A sealing structure for an electrical cable according to claim 1, wherein The sealing structure (4) includes a cylindrical part (6) extending from the cable sheath (1) and a flat annular part (5) connected perpendicularly to the end of the cylindrical part (6) away from the cable sheath (1).

3. A sealing structure for an electrical cable according to claim 2, wherein The thickness of the cylindrical part (6) is the same as that of the annular part (5).

4. A seal for an electrical cable according to claim 1, wherein, The sealing structure (4) is made of the same material as the cable sheath (1), which is cross-linked polyethylene.

5. A molding die suitable for use in the sealing structure for an electric cable according to any one of claims 1 to 4, characterized by, The mold includes a mold A (7), a mold B (8) and a mold C (9), and during the molding of the sealing structure (4): the mold C (9) is used to separate the cable sheath (1) and the cable core (2) by being inserted therebetween, and the mold A (7) and the mold B (8) are used to be sleeved outside the cable sheath (1) and form a cavity conforming to the shape of the sealing structure (4) with the mold C (9).

6. A forming mold for a sealing structure of an electric cable according to claim 5, characterized in that, The mold A (7), the mold B (8) and the mold C (9) are all made of metal materials.

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