A cable intermediate joint insulation protection device

Abstract

The present application relates to an insulation protection device for an intermediate cable joint, and relates to the technical field of cable connection, and aims to improve the problem of poor sealing of traditional intermediate cable joints. An insulation protection device for an intermediate cable joint, comprising a joint body arranged on a cable body; an insulating layer for covering the joint body is arranged on the cable body, two sets of protective covers for covering the insulating layer are arranged on the cable body, a moisture-proof layer is arranged between the protective cover and the insulating layer, and a fastening assembly for fastening the protective cover and the cable body is arranged on the protective cover. The present application has the effect of protecting and sealing the intermediate cable joint.

Description

Technical Field

[0001] The present application relates to the technical field of cable connection, and in particular to an insulation protection device for a cable intermediate joint. Background Art

[0002] Cables are used to transmit and distribute electrical energy. They are made up of one or more twisted wires. Cables are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas.

[0003] In the related art, when the cable laying length is long, it is necessary to use a cable intermediate joint for connection. Common methods include using metal threaded pipes or integral prefabricated intermediate joints for cable connection. In addition, in the process of laying underground cables, the sand-covered direct burial method is usually adopted. Therefore, the insulation protection at the cable joint can only be achieved by relying on the insulation accessories of the cable intermediate joint.

[0004] With respect to the above-mentioned related technologies, the inventors found that the following problems exist in the technologies: the sealing performance of the conventional intermediate joints of cables is poor, and the cables laid underground are easily corroded by moisture, which affects the safety and stability of the cables, so there is room for improvement. Utility Model Content

[0005] In order to improve the problem of poor sealing of traditional cable intermediate joints, the present application provides an insulation protection device for cable intermediate joints.

[0006] The present application provides a cable intermediate joint insulation protection device adopts the following technical solution:

[0007] An insulation protection device for an intermediate cable joint comprises a joint body arranged on a cable body; an insulating layer for covering the joint body is arranged on the cable body, two sets of protective covers for covering the insulating layer are arranged opposite to each other on the cable body, a moisture-proof layer is arranged between the protective covers and the insulating layer, and a fastening component for fastening the protective covers and the cable body is arranged on the protective covers.

[0008] By adopting the above technical scheme, the insulating layer wraps the connector body and the connection with the cable body, playing a role of insulation protection; the moisture-proof layer protects and wraps the insulating layer, playing a role of moisture-proof; the fastening assembly fixes the protective cover on the cable body, protects the moisture-proof layer and the connector body, reduces the wear of the moisture-proof layer and the connector body by external substances, ensures the long-term and stable protection of the cable and the connector body by the protective device, and improves the safety and stability of the cable.

[0009] Preferably, the fastening assembly includes a fastening plate, a fastening bolt and a fastening nut; the fastening plate is arranged on each group of protective covers, and the fastening plates on the two protective covers are arranged one by one, the fastening bolt is passed through the corresponding fastening plate, and the fastening nut is threadedly connected to the fastening bolt to limit the fastening bolt from detaching from the fastening plate.

[0010] By adopting the above technical solution, the fastening bolts are inserted into the relative fastening plates, and the fastening nuts are threadedly connected to the fastening bolts, so that the relative fastening plates are fastened and connected, thereby fixing the two sets of protective covers on the cable body and achieving stable installation of the protective covers.

[0011] Preferably, the fastening assembly further comprises a sealing strip, and the sealing strip is tightly arranged between the two sets of protective covers so as to tightly fit the protective covers and the cable body.

[0012] By adopting the above technical solution, the sealing strip makes the protective covers closely attached to each other, and makes the protective covers and the cable body closely attached to each other, thereby improving the air tightness of the protective cover installation and further improving the moisture-proof effect of the protective device.

[0013] Preferably, the side walls of the two protective covers that are in contact with each other are each provided with a plurality of groups of plug-in blocks, and the side wall of each protective cover is provided with a plug-in groove for the plug-in blocks to be inserted into.

[0014] By adopting the above technical solution, during the installation of the protective cover, the plug-in block is pushed into the corresponding plug-in slot to facilitate the quick and accurate installation of the protective cover, thereby reducing the occurrence of misalignment of the protective covers and improving the convenience of installing the protective cover.

[0015] Preferably, both ends of each of the protective covers are provided with extension portions for fitting the cable body, and the thickness of each of the extension portions gradually decreases in a direction away from the protective cover.

[0016] By adopting the above technical solution, the shape of the extension portion increases the contact area between the end of the protective cover and external substances, reduces the phenomenon of external force pushing the protective cover to be dislocated, and thus improves the stability of the protective cover in use.

[0017] Preferably, a grouting port is provided between the two protective covers, and the protective cover is provided with a sealing member at the grouting port for closing the grouting port.

[0018] By adopting the above technical solution, the setting of the grouting port facilitates the introduction of moisture-proof sealing agent into the interior of the protective cover to form a moisture-proof layer. The sealing member blocks and seals the grouting port, reducing the occurrence of external moisture being introduced into the interior of the protective cover through the grouting port.

[0019] Preferably, the sealing member comprises a threaded rod, a sealing cover, several groups of folding plates and an abutment plate; the threaded rod is threadedly connected to the inside of the grouting port, and the sealing cover is arranged at one end of the threaded rod to close the grouting port; all the folding plates are arranged at the end of the threaded rod away from the sealing cover, all the folding plates are distributed at intervals along the circumference of the threaded rod, the middle parts of all the folding plates can be folded in a direction away from each other, and the folding plates can abut against the inner side wall of the protective cover; the abutment plate is arranged at the end of all the folding plates away from the threaded rod to abut against the moisture-proof layer.

[0020] By adopting the above technical scheme, the interior of the protective cover is filled with moisture-proof sealing agent through the grouting port, the abutment plate and the folding plate are pushed into the interior of the grouting port in turn, and the threaded rod is threadedly connected to the inner wall of the grouting port, and the sealing cover closes the grouting port; the abutment plate abuts against the moisture-proof sealing agent, and the abutment plate moves toward the direction close to the threaded rod under pressure, so that the folding plate gradually folds, and the moisture-proof sealing agent can flow between the folding plates to fix the folding plates; in addition, the folding plate can be abutted against the inner wall of the protective cover after being folded, thereby reducing the phenomenon of the seal detaching from the grouting port.

[0021] Preferably, a buffer layer is provided between the insulating layer and the moisture-proof layer.

[0022] By adopting the above technical solution, the buffer layer buffers the moisture-proof layer and the insulating layer, reducing the phenomenon of excessive extrusion damage to the insulating layer and the joint body caused by the moisture-proof layer absorbing moisture and expanding, thereby ensuring the stability of the insulation layer and the moisture-proof layer in protecting the joint body.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The insulating layer is provided to insulate and protect the connector body and the cable body; the moisture-proof layer protects the insulating layer from moisture; the fastening components and the protective cover protect the moisture-proof layer and the connector body, thereby reducing the wear of the moisture-proof layer and the connector body by external substances, ensuring the long-term and stable protection of the cable and the connector body by the protective device, and improving the safety and stability of the cable.

[0025] 2. By setting a buffer layer between the moisture-proof layer and the insulating layer, the phenomenon of excessive extrusion damage to the insulating layer and the joint body caused by the moisture-proof layer absorbing moisture and expanding is reduced, thereby ensuring the stability of the insulation layer and the moisture-proof layer in protecting the joint body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an insulation protection device for a cable intermediate joint according to an embodiment of the present application;

[0027] Figure 2It is a cross-sectional schematic diagram used to reflect the internal structure of the protective cover;

[0028] Figure 3 It is an exploded diagram showing the internal structure of the protective cover.

[0029] Description of reference numerals:

[0030] 1. Cable body; 11. Connector body; 12. Insulation layer; 13. Buffer layer; 14. Moisture-proof layer; 2. Protective cover; 21. Plug block; 22. Plug slot; 23. Extension part; 24. Grouting port; 3. Fastening assembly; 31. Fastening plate; 32. Fastening bolt; 33. Fastening nut; 34. Sealing strip; 4. Sealing element; 41. Threaded rod; 42. Sealing cover; 43. Folding plate; 44. Abutment plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses an insulation protection device for a cable intermediate joint.

[0033] Reference Figure 1 and Figure 2 A cable intermediate joint insulation protection device includes a joint body 11 installed on a cable body 1, and the cable body 1 and the joint body 11 are covered with an insulating layer 12. In this embodiment, the insulating layer 12 can be made of PVC. The outer adhesive coating of the insulating layer 12 is connected with a buffer layer 13. In this embodiment, the buffer layer 13 can be made of soft rubber.

[0034] Reference Figure 2 and Figure 3 Two sets of protective covers 2 are relatively installed on the cable body 1. In this embodiment, the protective covers 2 can be made of stainless steel to cover the cable body 1 and the buffer layer 13. A fastening assembly 3 is installed on the protective cover 2 to fasten the protective cover 2 and the cable body 1. A grouting port 24 is opened between the two sets of protective covers 2, and a moisture-proof layer 14 is formed between the protective cover 2 and the buffer layer 13. In this embodiment, the moisture-proof layer 14 can be formed by solidifying the moisture-proof plugging agent injected through the grouting port 24.

[0035] Reference Figure 1 and Figure 2 The fastening assembly 3 includes a fastening plate 31, a fastening bolt 32, a fastening nut 33 and a sealing strip 34; the fastening plates 31 are integrally formed at both ends of each group of protective covers 2 in the length direction, and the fastening plates 31 are distributed on both sides of each group of protective covers 2 in the width direction, and the opposite fastening plates 31 on the two groups of protective covers 2 are respectively arranged one by one.

[0036] Reference Figure 1 and Figure 2 The fastening bolts 32 are inserted into the corresponding two sets of fastening plates 31, and each set of fastening nuts 33 is threadedly connected to each set of fastening bolts 32. The side walls of each set of fastening nuts 33 are against the side walls of the fastening plates 31 to drive the two sets of protective covers 2 to be tightly buckled on the cable body 1.

[0037] Reference Figure 2 and Figure 3 The side walls of the two sets of protective covers 2 facing each other are integrally formed with a plurality of plug-in blocks 21, and the side wall of each set of protective covers 2 facing the cable body 1 is provided with a plug-in slot 22 for the plug-in block 21 on the other protective cover 2 to be pressed in. The sealing strip 34 is glued to the side walls of the two sets of protective covers 2 so that the two sets of protective covers 2 are tightly pressed against each other and the protective covers 2 and the cable body 1 are more closely fitted.

[0038] Reference Figure 2 and Figure 3 Both ends of each group of protective covers 2 are glued with extension parts 23. In the present embodiment, the extension parts 23 are made of rubber, the inner side walls of the extension parts 23 are glued with the cable body 1, and the thickness of each group of extension parts 23 gradually decreases in the direction away from the protective cover 2.

[0039] Reference Figure 2 and Figure 3 The protective cover 2 is provided with a sealing member 4 at the grouting port 24 for closing the grouting port 24. The sealing member 4 comprises a threaded rod 41, a sealing cover 42, a plurality of folding plates 43 and an abutting plate 44; the threaded rod 41 is threadedly connected to the inner side wall of the grouting port 24, the sealing cover 42 is integrally formed at the end of the threaded rod 41 away from the joint body 11, and the side wall of the sealing cover 42 facing the threaded rod 41 abuts against the outer side wall of the protective cover 2, thereby covering the grouting port 24.

[0040] Reference Figure 2 and Figure 3 , all the folding plates 43 are glued to the ends of the threaded rod 41 away from the sealing cover 42, and all the folding plates 43 are spaced along the circumference of the threaded rod 41. The abutment plates 44 are glued to the ends of all the folding plates 43 away from the threaded rod 41, and the side walls of the abutment plates 44 away from the folding plates 43 can abut against the moisture-proof layer 14. In this embodiment, the folding plates 43 can be hard plastic plates, and each group of folding plates 43 can be folded in half along the middle, and each group of folding plates 43 is folded in a direction away from each other, so that the folding plates 43 abut against the inner side wall of the protective cover 2, thereby limiting the seal 4 from being separated from the grouting port 24.

[0041] The implementation principle of the insulation protection device for the intermediate joint of a cable in the embodiment of the present application is as follows:

[0042] The insulating layer 12 covers the connector body 11, and the buffer layer 13 covers the insulating layer 12; the two sets of protective covers 2 are clamped together and the buffer layer 13 is covered, the fastening bolts 32 are passed through the fastening plate 31, and the fastening nuts 33 are threadedly connected to the fastening bolts 32 to achieve a fastening connection between the protective covers 2 and the cable body 1.

[0043] A moisture-proof sealing agent is injected between the protective cover 2 and the buffer layer 13 through the grouting port 24, and solidified to form a moisture-proof layer 14. Finally, the grouting port 24 is fixedly sealed by the seal 4, thereby realizing protection and sealing of the joint body 11 of the cable body 1, reducing the phenomenon of moisture on the cable body 1 at the joint body 11, and ensuring the safety and stability of the cable.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An insulation protection device for a cable intermediate joint, comprising a joint body (11) arranged on a cable body (1); characterized in that: The cable body (1) is provided with an insulating layer (12) for covering a connector body (11); two sets of protective covers (2) for covering the insulating layer (12) are arranged on the cable body (1) in a relative manner; a moisture-proof layer (14) is arranged between the protective covers (2) and the insulating layer (12); and a fastening component (3) for fastening and connecting the protective covers (2) and the cable body (1) is arranged on the protective covers (2).

2. The cable intermediate joint insulation protection device according to claim 1, characterized in that: The fastening assembly (3) comprises a fastening plate (31), a fastening bolt (32) and a fastening nut (33); the fastening plate (31) is arranged on each group of protective covers (2), and the fastening plates (31) on the two protective covers (2) are arranged one by one, respectively, the fastening bolt (32) is passed through the corresponding fastening plate (31), and the fastening nut (33) is threadedly connected to the fastening bolt (32) to limit the fastening bolt (32) from detaching from the fastening plate (31).

3. The cable intermediate joint insulation protection device according to claim 2, characterized in that: The fastening assembly (3) further comprises a sealing strip (34), wherein the sealing strip (34) is tightly arranged between the two sets of protective covers (2) so as to tightly fit the protective covers (2) and the cable body (1).

4. The cable intermediate joint insulation protection device according to claim 1, characterized in that: The side walls of the two protective covers (2) that are in contact with each other are each provided with a plurality of groups of plug-in blocks (21), and the side wall of each protective cover (2) is provided with a plug-in slot (22) for the plug-in block (21) to be inserted into.

5. The cable intermediate joint insulation protection device according to claim 1, characterized in that: Both ends of each of the protective covers (2) are provided with extension portions (23) for fitting the cable body (1), and the thickness of each of the extension portions (23) gradually decreases in a direction away from the protective cover (2).

6. The cable intermediate joint insulation protection device according to claim 1, characterized in that: A grouting port (24) is provided between the two protective covers (2), and a sealing member (4) for closing the grouting port (24) is provided at the protective cover (2).

7. The cable intermediate joint insulation protection device according to claim 6, characterized in that: The sealing member (4) comprises a threaded rod (41), a sealing cover (42), a plurality of groups of folding plates (43) and an abutment plate (44); the threaded rod (41) is threadedly connected to the inside of the grouting port (24); the sealing cover (42) is arranged at one end of the threaded rod (41) to close the grouting port (24); all the folding plates (43) are arranged at the end of the threaded rod (41) away from the sealing cover (42); all the folding plates (43) are distributed at intervals along the circumference of the threaded rod (41); the middle parts of all the folding plates (43) can be folded in a direction away from each other, and the folding plates (43) can abut against the inner side wall of the protective cover (2); the abutment plate (44) is arranged at the end of all the folding plates (43) away from the threaded rod (41) to abut against the moisture-proof layer (14).

8. The cable intermediate joint insulation protection device according to claim 1, characterized in that: A buffer layer (13) is provided between the insulating layer (12) and the moisture-proof layer (14).

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