Intermediate joint of high-voltage cable

Abstract

The utility model relates to the technical field of high-voltage cable joints, and discloses an intermediate joint of a high-voltage cable, which comprises a lower shell, an upper shell used for protection is arranged at the top of the lower shell, a limiting tube used for fixing is arranged in the lower shell, two ends of the limiting tube are respectively provided with a closed tube, and a cable is arranged on the inner wall of the limiting tube. According to the intermediate joint of the high-voltage cable, through cooperative arrangement of the limiting pipe, the sealing pipe and the cable, the device can fix and seal a connecting part during use, and external moisture, moisture, dust and other impurities are prevented from entering the device, so that the insulating property of the device is improved, and the situations of electric leakage and short circuit are reduced; the limiting pipe can fix a cable connecting part and prevent the connecting part from falling off due to stress, the sealing pipe can block moisture and dust, so that the influence of the external environment on the connecting part is reduced, and the cable can transmit electric power.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage cable connector technology, specifically to an intermediate connector for a high-voltage cable. Background Technology

[0002] In power transmission systems, intermediate joints of high-voltage cables play a crucial role in connecting two cable segments to maintain the continuity of power transmission. However, traditional intermediate joint designs often suffer from insufficient sealing performance, making it easy for external impurities such as moisture, dust, and other contaminants to enter the joint, leading to decreased insulation performance and increasing the risk of leakage and short circuits. In addition, traditional joint designs also have shortcomings in fixing the cable connection points, which can easily cause the connection points to detach due to uneven stress, affecting the stability and safety of power transmission. Therefore, it is necessary to design a new type of high-voltage cable intermediate joint to solve the above problems.

[0003] Chinese Patent Publication No. CN208874256U discloses a protective shell for a high-voltage cable intermediate joint with fixing buckles, including a first protective cover, a second protective cover, and multiple fixing buckles. Both the first and second protective covers are semi-enclosed structures, with lugs formed on at least two sides of each cover. The openings of the first and second protective covers are opposite to each other, and the space formed by the first and second protective covers accommodates two parallel high-voltage cable intermediate joints. The corresponding lugs on the first and second protective covers fit together, and the fixing buckles are sleeved on the outside of the fitting lugs on the first and second protective covers. Implementing this embodiment of the invention can protect high-voltage cable intermediate joints.

[0004] However, this utility model has the following problems in actual use:

[0005] When using this invention, it is not convenient to fix and seal the connection parts, which may cause external moisture and dust to enter the device during use, thereby affecting the normal transmission of electricity and reducing the protective effect of the device. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To overcome the aforementioned shortcomings of the prior art, this utility model provides an intermediate joint for high-voltage cables, solving the problems in the prior art:

[0008] However, this invention is not convenient for fixing and sealing the connection parts during use, which may cause external moisture and dust to enter the device, thereby affecting the normal transmission of electricity and reducing the protective effect of the device.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-voltage cable intermediate joint, including a lower housing, an upper housing for protection at the top of the lower housing, a limiting tube for fixing inside the lower housing, a closed tube at both ends of the limiting tube, and a cable on the inner wall of the limiting tube.

[0011] Optionally, an insulating pad is fixedly connected to the top of the lower housing, a limiting tube is snapped into the top of the insulating pad, and a threaded hole is provided on the top of the lower housing.

[0012] Optionally, the top of the upper housing is threaded with a bolt, the outer surface of which is threaded to the inner wall of the threaded hole.

[0013] Optionally, a trapezoidal hole is provided at the top of the limiting tube, and threaded tubes are fixedly connected to both ends of the limiting tube.

[0014] Optionally, a fixing pin is threaded to the top of the trapezoidal hole, and a rubber pad is engaged with the inner wall of the trapezoidal hole.

[0015] Optionally, a sleeve is fixedly connected to one side of the closed tube, and the inner wall of the sleeve is threadedly connected to the outer surface of the threaded tube.

[0016] Optionally, a sealing ring is fixedly connected to the inner wall of the sealed tube, and the inner wall of the sealing ring is engaged with the outer surface of the cable.

[0017] Optionally, a conductor is fixedly connected to the inner wall of the cable, and the outer surface of the conductor is engaged with the inner wall of the limiting tube.

[0018] (III) Beneficial Effects

[0019] This utility model provides an intermediate joint for high-voltage cables, which has the following advantages:

[0020] The intermediate joint of this high-voltage cable, through the combined arrangement of a limiting tube, a sealing tube, and the cable, allows the device to fix and seal the connection point during use, preventing external moisture, humidity, dust, and other impurities from entering the device. This improves the device's insulation performance and reduces the possibility of leakage and short circuits. The limiting tube fixes the cable connection point, preventing it from detaching under stress. The sealing tube blocks moisture and dust, reducing the impact of the external environment on the connection point. The cable transmits electricity, further enhancing the device's protective effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2This is a schematic diagram of the lower shell structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the limiting tube structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the closed tube structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the cable structure of this utility model.

[0026] In the diagram: 1. Lower housing; 2. Upper housing; 3. Limiting tube; 4. Sealing tube; 5. Cable; 6. Insulating pad; 7. Threaded hole; 8. Bolt; 9. Trapezoidal hole; 10. Threaded tube; 11. Fixing nail; 12. Rubber pad; 13. Sleeve; 14. Sealing ring; 15. Conductor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figures 1 to 5 This utility model provides a technical solution: a high-voltage cable intermediate joint, which is mainly used in scenarios where high-voltage cables are connected.

[0029] Example 1:

[0030] Please see Figure 1 , Figure 3 and Figure 5 In order to fix the connection part of the device during use, a limit tube 3 and a cable 5 are provided;

[0031] The lower housing 1 has a limiting tube 3 for fixing inside. The inner wall of the limiting tube 3 is equipped with a cable 5. A trapezoidal hole 9 is opened at the top of the limiting tube 3. Threaded tubes 10 are fixedly connected to both ends of the limiting tube 3. A fixing nail 11 is threadedly connected to the top of the trapezoidal hole 9. A rubber gasket 12 is clamped to the inner wall of the trapezoidal hole 9. A conductor 15 is fixedly connected to the inner wall of the cable 5. The outer surface of the conductor 15 is clamped to the inner wall of the limiting tube 3. The trapezoidal hole 9 at the top of the limiting tube 3 not only facilitates installation and disassembly but also enhances the stability of the structure. The fixing nail 11 is fixed to the top of the trapezoidal hole 9 by a threaded connection. The fixing nail 11 is used to fix the connection part inside the cable 5. The rubber gasket 12 is also clamped to the inner wall of the trapezoidal hole 9, which increases the sealing and reduces power leakage. As the core component of power transmission, the cable 5 has a conductor 15 fixedly connected to its inner wall. The outer surface of the conductor 15 is tightly clamped to the inner wall of the limiting tube 3, which effectively ensures the continuity of power transmission and improves the protection of the device.

[0032] Example 2:

[0033] Please see Figure 1 and Figure 4 In order to enhance the sealing effect of the device during use, a sealing tube 4 is provided;

[0034] Both ends of the limiting tube 3 are equipped with sealing tubes 4. A sleeve 13 is fixedly connected to one side of the sealing tube 4. The inner wall of the sleeve 13 is threadedly connected to the outer surface of the threaded tube 10. A sealing ring 14 is fixedly connected to the inner wall of the sealing tube 4. The inner wall of the sealing ring 14 is snapped into the outer surface of the cable 5. The design of the sleeve 13 fixedly connected to one side of the sealing tube 4 allows the sealing tube 4 to be tightly threadedly connected to the threaded tubes 10 at both ends of the limiting tube 3 through the inner wall of the sleeve 13. This connection method is not only easy to install, but also provides reliable sealing performance. The sealing ring 14 is fixedly connected to the inner wall of the sealing tube 4. The sealing ring 14 is made of highly elastic sealing material. Its inner wall is tightly snapped into the outer surface of the cable 5. This design ensures a seamless connection between the cable 5 and the sealing tube 4, further enhancing the sealing effect of the device and reducing external erosion of the device's interior.

[0035] Example 3:

[0036] Please see Figure 1 and Figure 2 In order to enable the device to withstand external impacts during use, a lower housing 1 and an upper housing 2 are provided;

[0037] The lower housing 1 has an upper housing 2 for protection on its top. An insulating pad 6 is fixedly connected to the top of the lower housing 1, and a limit tube 3 is snapped into the top of the insulating pad 6. A threaded hole 7 is opened on the top of the lower housing 1, and a bolt 8 is threadedly connected to the top of the upper housing 2. The outer surface of the bolt 8 is threaded to the inner wall of the threaded hole 7. The lower housing 1 serves as the basic support part of the device, and its top is designed with the upper housing 2 for installation and protection. The upper housing 2 is tightly integrated with the lower housing 1 to form a robust outer shell, providing additional protection for the inside of the device. An insulating pad 6 is fixedly connected to the top of the lower housing 1. This design not only enhances the electrical insulation of the device... In addition to insulation performance, it also ensures that the limiting tube 3 can be stably installed on the lower housing 1. The insulating pad 6 is made of a material with high insulation performance and good wear resistance to ensure that its insulation performance and stability will not be affected during long-term use. Furthermore, threaded holes 7 are opened on the top of the lower housing 1. These threaded holes 7 provide reliable connection points for the installation of the upper housing 2. The top of the upper housing 2 is threaded with bolts 8. The outer surface of the bolts 8 fits tightly with the inner wall of the threaded holes 7. By rotating the bolts 8, the upper housing 2 can be firmly fixed on the lower housing 1, forming a tight outer shell structure and increasing the impact resistance of the device.

[0038] In this invention, the working steps of the device are as follows:

[0039] First, pass the cable 5 through the limiting tube 3 and snap the conductor 15 into the inner wall of the limiting tube 3, and fix it with the fixing nail 11. Next, connect the closed tube 4 to the threaded tubes 10 at both ends of the limiting tube 3 through the sleeve 13 and tighten the sleeve 13. Then, snap the limiting tube 3 onto the insulating pad 6 on the top of the lower housing 1. Finally, place the upper housing 2 on top of the lower housing 1 and connect it to the threaded hole 7 through the bolt 8. Tighten the bolt 8 to fix the upper housing 2 and the lower housing 1, and the installation is completed.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage cable intermediate joint, comprising a lower housing (1), characterized in that: The lower housing (1) has an upper housing (2) for protection at its top. The lower housing (1) has a limiting tube (3) for fixing inside. Both ends of the limiting tube (3) have closed tubes (4). The inner wall of the limiting tube (3) has a cable (5). The top of the lower housing (1) is fixedly connected to an insulating pad (6). The top of the insulating pad (6) is snapped with the limiting tube (3). The top of the lower housing (1) has a threaded hole (7). The top of the upper housing (2) is threadedly connected to a bolt (8). The outer surface of the bolt (8) is threadedly connected to the inner wall of the threaded hole (7). A sleeve (13) is fixedly connected to one side of the closed tube (4), and the inner wall of the sleeve (13) is threadedly connected to the outer surface of the threaded tube (10). The inner wall of the closed tube (4) is fixedly connected with a sealing ring (14), and the inner wall of the sealing ring (14) is snapped into the outer surface of the cable (5). The inner wall of the cable (5) is fixedly connected to a conductor (15), and the outer surface of the conductor (15) is engaged with the inner wall of the limiting tube (3).

2. The intermediate joint of a high-voltage cable according to claim 1, characterized in that: The top of the limiting tube (3) is provided with a trapezoidal hole (9), and the two ends of the limiting tube (3) are fixedly connected with threaded tubes (10).

3. The intermediate joint of a high-voltage cable according to claim 2, characterized in that: The top of the trapezoidal hole (9) is threaded with a fixing nail (11), and the inner wall of the trapezoidal hole (9) is fitted with a rubber pad (12).

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