Waterproof structure of cable grounding wire

Abstract

The utility model discloses a waterproof structure of a cable grounding wire, the grounding wire is led out from a metal shielding layer of a cable, and the waterproof structure of the cable grounding wire comprises the grounding wire, a sheath tube and a flexible sealing layer; the sheath tube is sleeved outside the grounding wire, and the flexible sealing layer coats the surface of the grounding wire and fills a gap between the grounding wire and the sheath tube. According to the utility model, the flexible sealing layer is additionally arranged between the grounding wire and the sheath tube to form a tight seamless plugging structure, so that water is prevented from entering the cable with the grounding wire, the cable accessory and the interior of the cable as a path, reliable operation of the outdoor cable accessory or the buried cable accessory is guaranteed, and the service life of the cable accessory is prolonged. Even if a certain shape change occurs at the end part of the grounding wire, mechanical damage does not affect the overall waterproofness of the cable system.

Description

Technical Field

[0001] The utility model relates to the technical field of cable grounding, in particular to a waterproof structure of a cable grounding wire. Background Art

[0002] At present, the commonly used cable accessories in China mainly include cold shrink type, heat shrink type and prefabricated detachable connectors. Due to actual engineering needs and the installation requirements of the cable accessories themselves, the metal shielded grounding wire of the cable installed with the accessories needs to be led out and connected to the grounding system. The common method of making the cable grounding wire is to lead out the metal shielded wire of the cable, then crimp the grounding terminal and use a heat shrink tube for shrink protection. This method will cause defects in the protective heat shrink tube and lose its original sealing performance when the cable grounding wire is bent, squeezed or mechanically damaged, causing water to enter the cable from the grounding wire, resulting in cable operation failure.

[0003] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0004] The main purpose of the utility model is to provide a waterproof structure for a cable grounding wire, aiming to solve the technical problem that the existing sealing structure is imperfect and water easily enters the inside of the cable from the grounding wire.

[0005] To achieve the above-mentioned purpose, the utility model proposes a waterproof structure of a cable grounding wire, wherein the grounding wire is led out from the metal shielding layer of the cable, and is characterized in that the waterproof structure of the cable grounding wire includes a grounding wire, a sheath tube and a flexible sealing layer; the sheath tube is sleeved on the outside of the grounding wire, and the flexible sealing layer is coated on the surface of the grounding wire and fills the gap between the grounding wire and the sheath tube.

[0006] Optionally, the flexible sealing layer is in a clay-like state.

[0007] Optionally, one end of the grounding wire is connected to a wiring terminal, the wiring terminal has a crimping tube, and the sheath tube entirely covers the grounding wire and the crimping tube.

[0008] Optionally, the sheath tube is a heat shrink tube.

[0009] Optionally, the grounding wire is cut into two sections, and the waterproof structure of the cable grounding wire also includes a partition tube; the partition tube includes a first pipe section, a solid section and a second pipe section connected in sequence, and the two cut ends of the grounding wire are respectively connected to the first pipe section and the second pipe section.

[0010] Optionally, the first pipe segment, the solid segment and the second pipe segment are an integrally formed structure, and the material thereof is the same as that of the grounding wire.

[0011] Optionally, the truncated end is connected to the first pipe segment or the second pipe segment by a crimping process.

[0012] Optionally, the truncated end abuts against the solid segment, and a surface of the truncated end is coated with conductive paste.

[0013] Optionally, the partition tube is arranged inside the sheath tube, and there is no gap between the partition tube and the sheath tube;

[0014] And / or, the flexible sealing layer is filled between the partition tube and the jacket tube.

[0015] The beneficial effect of the utility model is that a flexible sealing layer is added between the grounding wire and the sheath tube to form a tight and seamless sealing structure, thereby preventing water from entering the cable along the path of grounding wire-cable accessories-cable interior, thereby ensuring the reliable operation of outdoor cable accessories or underground cable accessories, and even if certain shape changes or mechanical damages occur at the end of the grounding wire, it will not affect the overall waterproofness of the cable system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the cable of the utility model;

[0018] Figure 2 It is a structural schematic diagram of an embodiment of the waterproof structure of the cable grounding wire of the utility model;

[0019] Figure 3 It is a structural schematic diagram of another embodiment of the waterproof structure of the cable grounding wire of the utility model;

[0020] Figure 4 for Figure 3 A schematic diagram of the partial structure of the waterproof structure of the cable grounding wire is shown in FIG.

[0021] Description of Figure Numbers:

[0022]

[0023]

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] See also Figure 1 and Figure 2The utility model provides a waterproof structure of a cable grounding wire, wherein the grounding wire 20 is led out from the metal shielding layer 15 of the cable 10. In one embodiment, the structure of the cable 10 includes a conductor 11, a conductor shielding layer 12, an insulating layer 13, an insulating shielding layer 14, a metal shielding layer 15, and an outer sheath 16 from the inside to the outside. Specifically, the metal shielding layer 15 is composed of copper wires, and the grounding wire 20 is led out from the metal shielding layer 15 and braided into a bundle of copper wire braids.

[0030] In the present invention, the waterproof structure of the cable grounding wire comprises a grounding wire 20, a sheath tube 30 and a flexible sealing layer 40. The sheath tube 30 is sleeved on the outside of the grounding wire 20, and the flexible sealing layer 40 is coated on the surface of the grounding wire 20 and fills the gap between the grounding wire 20 and the sheath tube 30.

[0031] The utility model forms a tight and seamless sealing structure by adding a flexible sealing layer 40 between the ground wire 20 and the sheath tube 30, thereby preventing water from entering the cable along the path of ground wire-cable accessories-cable interior, thereby ensuring the reliable operation of outdoor cable accessories or underground cable accessories. Even if a certain shape change or mechanical damage occurs at the end of the ground wire 20, it will not affect the overall waterproofness of the cable system.

[0032] Preferably, the flexible sealing layer 40 is in the form of a paste, which can effectively fill the gap and prevent water vapor from entering. Specifically, the flexible sealing layer 40 can be an insulating sealant made of a polymer material and has the properties of insulation, waterproofing, and sealing.

[0033] Specifically, one end of the grounding wire 20 is connected to the terminal 50, the terminal 50 has a crimping tube, and the sheath tube 30 entirely covers the grounding wire 20 and the crimping tube to protect the overall installation structure of the grounding wire 20. The grounding wire 20 is connected to the crimping tube of the terminal 50 by a crimping process.

[0034] Preferably, the sheath tube 30 is a heat shrink tube, which can be heated and shrunk to cover the ground wire 20 as a whole, which is convenient for installation. In other embodiments, the sheath tube 30 can also be a cold shrink tube or other elastic tube.

[0035] For further information, see Figure 3 and Figure 4In a preferred embodiment, the grounding wire 20 is cut into two sections, and the waterproof structure of the cable grounding wire further includes a partition tube 60. The partition tube 60 includes a first tube section 61, a solid section 62, and a second tube section 63 that are connected in sequence, and the two cut ends of the grounding wire 20 are respectively connected to the first tube section 61 and the second tube section 63. In this embodiment, the partition tube 60 is provided, and the middle position of the partition tube 60 is a solid section 62, which disconnects the water inlet channel from the structure, which is not only waterproof, but also effectively prevents oil and dirt at the construction site from entering the cable.

[0036] The first pipe section 61, the solid section 62 and the second pipe section 63 are integrally formed, and the material thereof is the same as the material of the grounding wire 20. Specifically, the partition pipe 60 is made of copper, which does not affect the electrical conductivity and corrosion resistance of the grounding wire 20.

[0037] Specifically, the cut-off end is connected to the first pipe section 61 or the second pipe section 63 through a crimping process, and the cut-off end of the grounding wire 20 is tightly connected to the partition tube 60 through crimping.

[0038] Optionally, the truncated end abuts against the solid section 62 , and the surface of the truncated end is coated with conductive paste to ensure tightness of the connection between the truncated end and the partition tube 60 .

[0039] In this embodiment, the partition tube 60 is arranged inside the sheath tube 30, and there is no gap between the partition tube 60 and the sheath tube 30; and / or the flexible sealing layer 40 is filled between the partition tube 60 and the sheath tube 30, and the flexible sealing layer 40 and the partition tube 60 work together to improve the waterproof and oil-proof function of the overall structure of the cable grounding wire.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A waterproof structure for a cable grounding wire, wherein: The grounding wire is led out from the metal shielding layer of the cable, and is characterized in that the waterproof structure of the cable grounding wire includes a grounding wire, a sheath tube and a flexible sealing layer; the sheath tube is sleeved on the outside of the grounding wire, the flexible sealing layer is coated on the surface of the grounding wire and fills the gap between the grounding wire and the sheath tube.

2. The waterproof structure of the cable grounding wire according to claim 1, characterized in that: The flexible sealing layer is in the form of clay.

3. The waterproof structure of the cable grounding wire according to claim 1, characterized in that: One end of the grounding wire is connected to a wiring terminal, the wiring terminal has a crimping tube, and the sheath tube entirely covers the grounding wire and the crimping tube.

4. The waterproof structure of the cable grounding wire according to claim 3, characterized in that: The sheath tube is a heat shrinkable tube.

5. The waterproof structure of the cable grounding wire according to claim 1, characterized in that: The grounding wire is cut into two sections, and the waterproof structure of the cable grounding wire also includes a partition tube; the partition tube includes a first pipe section, a solid section and a second pipe section connected in sequence, and the two cut ends of the grounding wire are respectively connected to the first pipe section and the second pipe section.

6. The waterproof structure of the cable grounding wire according to claim 5, characterized in that: The first pipe section, the solid section and the second pipe section are an integrally formed structure, and the material thereof is the same as that of the grounding wire.

7. The waterproof structure of the cable grounding wire according to claim 5, characterized in that: The truncated end is connected to the first pipe section or the second pipe section by a crimping process.

8. The waterproof structure of the cable grounding wire according to claim 5, characterized in that: The truncated end abuts against the solid section, and a surface of the truncated end is coated with conductive paste.

9. The waterproof structure of the cable grounding wire according to claim 5, characterized in that: The partition tube is arranged inside the jacket tube, and there is no gap between the partition tube and the jacket tube; And / or, the flexible sealing layer is filled between the partition tube and the jacket tube.

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