Box bottom cable moisture-proof threading connection structure of distribution box

Abstract

The utility model relates to a box bottom cable moistureproof threading connection structure of a distribution box, comprising a distribution box body, the bottom of the distribution box body is provided with two wire inlets which are symmetrically distributed left and right, the distribution box body is internally provided with four moistureproof assemblies, every two of the four moistureproof assemblies are in one group, and the other two of the four moistureproof assemblies are in one group. The moisture-proof assemblies are symmetrically distributed up and down, each group of moisture-proof assemblies is mounted through a wire inlet, each moisture-proof assembly comprises a mounting base and a sealing ring, a cable enters the distribution box body through the interior of the mounting base, and after the cable is connected with an electrical element in the distribution box body, gas is injected into the cavity through the gas nozzle, so that the electrical element in the distribution box body is sealed. The sealing ring is tightly attached to the gap between the cable and the mounting base after expansion, so that a physical barrier is formed, moisture is effectively prevented from entering the box body, and cable insulation layer aging, metal part corrosion or short circuit faults caused by the moisture are avoided.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, specifically to a moisture-proof cable threading connection structure at the bottom of a distribution box. Background Technology

[0002] Wall-mounted distribution boxes are small electrical distribution devices installed on walls for power distribution, control, and circuit protection. They are suitable for home, office, commercial, and small industrial settings. The main body is mostly made of metal or insulating materials, with a protection rating of IP30 to IP65, making them adaptable to different indoor and outdoor environments. They integrate circuit breakers, residual current devices, and other components, providing overload and leakage protection functions to ensure electrical safety. Installation options include surface mounting and embedded mounting. The modular design supports flexible circuit expansion, combining practicality and economy, making them a commonly used terminal device in small and medium-sized power distribution systems.

[0003] Traditional wall-mounted distribution boxes require cutting cable entry channels at the bottom during installation. However, due to limitations in cutting technology or differences in cable specifications, irregular gaps often form between the entry hole and the cable. The cable may not enter perpendicularly, and burrs are easily left on the cut edges, making effective sealing difficult. Furthermore, most power distribution boxes are currently installed on the ground floor or in basements, especially during summer thunderstorms when ground moisture is severe. Because the humidity is high in basements, moisture from the air seeps into the box through the gaps, causing metal corrosion and insulation aging of electrical components such as circuit breakers and terminals. In severe cases, this can lead to short circuits, equipment failures, and even threaten electrical safety. Utility Model Content

[0004] The purpose of this utility model is to provide a moisture-proof cable connection structure for the bottom of a distribution box to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A moisture-proof cable connection structure for the bottom of a distribution box includes a distribution box body. The bottom of the distribution box body has two symmetrically distributed cable inlets. The interior of the distribution box body contains four moisture-proof components, arranged in pairs symmetrically. Each pair of moisture-proof components is installed through a cable inlet. All moisture-proof components include a mounting base and a sealing ring. The mounting base is slidably connected to the cable inlet. The sealing ring is embedded inside the mounting base. The mounting base is fixed to the distribution box body with sealant. The sealing ring has a cavity inside. An air nozzle communicating with the cavity is fixedly installed on the side of the sealing ring away from the cable inlet.

[0007] The beneficial effects of this utility model are: the cable enters the interior of the distribution box body through the interior of the mounting base, and after connecting with the electrical components inside the distribution box body, gas is injected into the cavity through the air nozzle, so that the sealing ring expands and tightly fits the gap between the cable and the mounting base, forming a physical barrier, effectively preventing moisture from entering the box body, and avoiding cable insulation aging, metal component corrosion or short circuit faults caused by moisture.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the mounting base has an internal mounting groove, and the sealing ring is embedded in the inside of the mounting groove, with its expansion surface located on the outside of the mounting groove.

[0010] The advantages of adopting the above-mentioned further solution are: it facilitates the installation of the sealing ring, allows the expansion surface to expand better, and fits better against the outer surface of the cable.

[0011] Furthermore, a guide groove is provided on the side of the mounting base away from the inlet, the guide groove is connected to the interior of the mounting groove, and the air nozzle is located inside the guide groove.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the guide groove plays a positioning role when installing the sealing ring, so that the air nozzle is located inside it, and only one guide groove is opened, so that the installation groove can ensure the restraining effect of the sealing ring after the sealing ring is installed.

[0013] Furthermore, each of the two mounting bases on the same side has four evenly distributed docking slots, and magnetic blocks are fixedly installed inside all the docking slots, with the upper and lower magnetic blocks attracting each other.

[0014] The beneficial effect of adopting the above-mentioned further solution is that when installing the moisture-proof components on the left and right sides, the magnetic blocks at the corresponding positions above and below can be used to make the two moisture-proof components have a certain connection during installation, which facilitates the installation of the base.

[0015] Furthermore, the mounting base is made of rigid plastic.

[0016] The advantages of adopting the above-mentioned further solution are: it has the advantages of high temperature resistance and high strength, and it is low in cost and easy to use in the distribution box.

[0017] Furthermore, the expansion surface of the sealing ring is coated with a self-healing coating, and the interior of the self-healing coating contains microcapsules.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: timely repair can be carried out when the coating is damaged, ensuring the sealing of the contact surface with the cable and extending the service life of the sealing ring. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the entire utility model from one perspective;

[0020] Figure 2 This is a three-dimensional structural diagram of the internal parts of the distribution box body of this utility model;

[0021] Figure 3 This is a front cross-sectional three-dimensional structural diagram of the moisture-proof component of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 A three-dimensional structural diagram of one of the two moisture-proof components on the left side of this utility model, taken from a split perspective.

[0024] Figure 6 This is a three-dimensional structural diagram of the two moisture-proof components on the left side of this utility model, taken from another perspective.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Distribution box body; 2. Inlet port; 3. Moisture-proof components; 301. Mounting base; 302. Sealing ring; 303. Sealant; 304. Cavity; 305. Air nozzle; 306. Mounting groove; 307. Guide groove; 4. Connecting groove; 5. Magnetic block; 6. Self-healing coating. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0028] Example 1, such as Figures 1-6As shown, a moisture-proof cable connection structure for the bottom of a distribution box includes a distribution box body 1. The bottom of the distribution box body 1 has two inlets 2 that are symmetrically distributed from left to right. The distribution box body 1 has four moisture-proof components 3 inside. The four moisture-proof components 3 are arranged in pairs and symmetrically distributed from top to bottom. Each pair of moisture-proof components 3 is installed through an inlet 2. All moisture-proof components 3 include a mounting base 301 and a sealing ring 302. The mounting base 301 is slidably connected to the inlet 2. The sealing ring 302 is embedded in the interior of the mounting base 301. The mounting base 301 is fixed to the distribution box body 1 by sealant 303. The interior of the sealing ring 302 has a cavity 304. An air nozzle 305 communicating with the interior of the sealing ring 302 is fixedly installed on the side of the sealing ring 302 away from the inlet 2.

[0029] The mounting base 301 slides through the inlet 2, and its top outer part is coated with sealant 303. During installation, the sealant 303 is used to connect the mounting base 301 to the distribution box body 1 to ensure the stability of the mounting base 301 after installation. The outside of the air nozzle 305 is also connected with a cap (not shown in the figure) by threads to facilitate the protection of the air nozzle 305. Gas is injected into the cavity 304 through the air nozzle 305, causing the expansion surface of the sealing ring 302 to expand and contact the outer surface of the cable to ensure the sealing relationship at the connection. In addition, moisture-proof components 3 are installed on both the upper and lower sides of one inlet 2. Under the action of the upper and lower sealing rings 302, the moisture-proof effect at the inlet 2 is further improved.

[0030] Example 2 is a further improvement based on Example 1. Specifically, the mounting base 301 has a mounting groove 306 inside, and the sealing ring 302 is embedded in the mounting groove 306, with the expansion surface located on the outside of the mounting groove 306.

[0031] This design allows the sealing ring 302 to be easily embedded inside the mounting base 301 via the mounting slot 306, making maintenance and replacement of the sealing ring 302 more convenient.

[0032] Example 3 is a further improvement based on Example 2. Specifically, the mounting base 301 has a guide groove 307 on the side away from the inlet 2. The guide groove 307 is connected to the interior of the mounting groove 306, and the air nozzle 305 is located inside the guide groove 307.

[0033] With this configuration, when installing the sealing ring 302, the air nozzle 305 is positioned inside the guide groove 307, thus ensuring the restraining effect of the installation groove 306 on the sealing ring 302.

[0034] Example 4 is a further improvement based on Example 1. Specifically, four evenly distributed docking slots 4 are provided on the opposite sides of the two mounting bases 301 on the left and right sides. Magnetic blocks 5 are fixedly installed inside all docking slots 4, and the upper and lower magnetic blocks 5 attract each other.

[0035] This design allows the magnetic blocks 5 at corresponding positions on the top and bottom to adhere to each other, enabling the magnetic blocks 5 to provide a positioning connection when installing the second moisture-proof component 3 on the left and right sides, thus improving the ease of installation.

[0036] Example 5 is a further improvement based on Example 1, and its specific details are as follows: The mounting base 301 is made of rigid plastic.

[0037] With this design, the mounting base 301 is made of polycarbonate, which has the advantages of ultra-high strength, high temperature resistance and transparency. It is not only resistant to ultraviolet rays and anti-aging, but also makes it easy to observe the structure of the connection.

[0038] Example 6 is a further improvement based on Example 1, and it is as follows: the expansion surface of the sealing ring 302 is coated with a self-healing coating 6, and the interior of the self-healing coating 6 contains microcapsules.

[0039] With this setup, when the coating surface is scratched or punctured, the microcapsules rupture and release a repair agent, which fills the damaged area under capillary action or external pressure, continuing to ensure sealing.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A moisture-proof cable connection structure for the bottom of a distribution box, comprising a distribution box body (1), characterized in that: The bottom of the distribution box body (1) has two inlet ports (2) that are symmetrically distributed from left to right. The interior of the distribution box body (1) is provided with four moisture-proof components (3). The four moisture-proof components (3) are arranged in pairs and are symmetrically distributed from top to bottom. Each group of moisture-proof components (3) is installed through one inlet port (2). All moisture-proof components (3) include a mounting base (301) and a sealing ring (302). The mounting base (301) is slidably connected to the inlet port (2). The sealing ring (302) is embedded in the interior of the mounting base (301). The mounting base (301) is fixed to the distribution box body (1) by sealant (303). The interior of the sealing ring (302) has a cavity (304). An air nozzle (305) communicating with the interior of the sealing ring (302) is fixedly installed on the side of the sealing ring (302) away from the inlet port (2).

2. The moisture-proof cable connection structure at the bottom of a distribution box according to claim 1, characterized in that: The mounting base (301) has an internal mounting groove (306), and the sealing ring (302) is embedded in the inside of the mounting groove (306), with its expansion surface located on the outside of the mounting groove (306).

3. The moisture-proof cable connection structure at the bottom of a distribution box according to claim 2, characterized in that: The mounting base (301) has a guide groove (307) on the side away from the inlet (2). The guide groove (307) is connected to the interior of the mounting groove (306), and the air nozzle (305) is located inside the guide groove (307).

4. The moisture-proof cable connection structure at the bottom of a distribution box according to claim 1, characterized in that: Four evenly distributed docking slots (4) are provided on the opposite sides of the two mounting bases (301) on the left and right sides. Magnetic blocks (5) are fixedly installed inside all the docking slots (4), and the upper and lower magnetic blocks (5) attract each other.

5. The moisture-proof cable connection structure at the bottom of a distribution box according to claim 1, characterized in that: The mounting base (301) is made of rigid plastic.

6. The moisture-proof cable connection structure at the bottom of a distribution box according to claim 1, characterized in that: The expansion surface of the sealing ring (302) is coated with a self-healing coating (6), and the interior of the self-healing coating (6) contains microcapsules.

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