Low-voltage reverse power supply prevention device

Abstract

The utility model relates to a low-voltage reverse power supply prevention device, and relates to the technical field of power supply devices. The second fixing sleeve is used for fixing an outgoing cable; one end of the connecting ring is in threaded connection with the first fixing sleeve, and the other end is in threaded connection with the second fixing sleeve; the sealing assembly is arranged on the first fixing sleeve and the second fixing sleeve; the sealing assembly comprises a sealing air bag which is arranged on the first fixing sleeve and the second fixing sleeve and used for sealing the incoming cable and the outgoing cable. Connecting grooves are formed in the abutting ring, the first fixing sleeve and the second fixing sleeve, the abutting ring is arranged on the connecting ring and slidably connected into the connecting grooves, gas in the connecting grooves is compressed into the sealing air bag, and the inlet cable and the outlet cable are sealed. The service life of the cable is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of power supply devices, and particularly to a low-voltage anti-backfeed power supply device. Background Art

[0002] A low-voltage anti-backfeed power supply device is a device used to protect the safe and stable operation of the power system. It can effectively prevent the occurrence of backfeed power supply in the power system and take timely measures to protect equipment and user equipment from damage. It is usually installed on both sides of the tie switch of low-voltage insulated distribution lines below 1 kV, branch poles, tension pole joints, and branch line points where backfeed power may occur, etc.

[0003] Currently, the Chinese utility model patent application with the publication date of November 15, 2022 and the publication number of CN 217824209U provides a low-voltage anti-backfeed power supply device, which effectively solves the problem that the friction force between the protective cover and the wire is small during installation, which is likely to cause the protective cover to slip. It includes two upper and lower protective covers. Fixed covers are symmetrically installed at both ends of the protective cover. A combination component is installed on one side of the protective cover. Pressing components are installed on the sides of the two protective covers away from each other. A fixing component is installed on the other side of the protective cover. The combination component includes mounting blocks provided on one side of the two protective covers. Symmetrical chutes are opened on the side of the mounting block close to the protective cover. A first screw rod is rotatably connected inside the chute. In this utility model, by rotating the first screw rod, the two protective covers are driven to approach each other, so that the insertion plate is inserted into the slot, and the clamping rod is clamped with the slot under the elastic force of the second spring, thereby fixing the two protective covers, and thus protecting the exposed part of the wire.

[0004] In the low-voltage anti-backfeed power supply device in the related art, there is a lack of a cable sealing protection device during the use of this electrical device. In some temporary or seasonal power usage places, such as construction sites, temporary activity sites, etc., electrical equipment and lines will be frequently adjusted according to power usage requirements and construction progress. The cable is exposed to a harsh environment, and the cable is easily eroded by environmental factors, resulting in damage to the wire core.

[0005] Therefore, it is necessary to provide a low-voltage anti-backfeed power supply device to solve the above problems. Summary of the Utility Model

[0006] The embodiment of this application provides a low-voltage anti-backfeed power supply device to improve the technical problem in the related art that in places where electrical equipment and lines need to be frequently replaced, there is a lack of seals, resulting in the cable being eroded by environmental factors and the insulation layer being damaged.

[0007] The embodiment of this application provides a low-voltage anti-backfeed power supply device, including:

[0008] A first fixing sleeve for fixing the incoming cable;

[0009] A second fixing sleeve for fixing the outgoing cable;

[0010] A connecting ring, one end of which is threadedly connected to the first fixing sleeve and the other end is threadedly connected to the second fixing sleeve;

[0011] A sealing assembly is arranged on the first fixing sleeve and the second fixing sleeve for sealing the connection part of the incoming cable and the outgoing cable from the outside;

[0012] The sealing assembly includes

[0013] A sealing airbag is arranged on the first fixing sleeve and the second fixing sleeve for sealing the incoming cable and the outgoing cable;

[0014] An abutting ring, connection grooves are formed on both the first fixing sleeve and the second fixing sleeve, the abutting ring is arranged on the connecting ring and is slidably connected in the connection groove for compressing the gas in the connection groove into the sealing airbag to seal the incoming cable and the outgoing cable.

[0015] In the technical solution described above in the embodiment of the present application, at least the following technical effects are achieved: when the user uses the low-voltage anti-backward power supply device to connect the incoming cable and the outgoing cable, the incoming cable is connected to the first fixing sleeve, the outgoing cable is connected to the second fixing sleeve, and the first fixing sleeve and the second fixing sleeve are fixed by the connecting ring. During the process of rotating the connecting ring, the first fixing sleeve and the second fixing sleeve, the gas in the connection groove is compressed into the sealing airbag by the abutting ring on the connecting ring, and the sealing airbag expands, thereby sealing the incoming cable and the outgoing cable.

[0016] The low-voltage anti-backward power supply device provided by the embodiment of the present application can rotate the connecting ring, the abutting ring compresses the gas in the connection groove into the sealing airbag, so that the sealing airbag expands, thereby tightly fitting the surface of the cable, forming a good sealing effect, effectively preventing moisture, dust and other impurities from entering the cable connection, protecting the insulating layer of the cable, and extending the service life of the cable.

[0017] In some embodiments, a sliding sealing plate is slidably connected in the connection groove, and one end of the sliding sealing plate abuts against the abutting ring.

[0018] In some embodiments, a abutting spring is further arranged in the connection groove, one end of the abutting spring abuts against the sliding sealing plate, and the other end of the abutting spring abuts against the first fixing sleeve.

[0019] In some embodiments, air guide pipes are further arranged on the first fixing sleeve and the second fixing sleeve, one end of the air guide pipe is communicated with the connection groove, and the other end of the air guide pipe is communicated with the sealing airbag.

[0020] In some embodiments, a fastening ring is also threadedly connected to the first fixing sleeve and the second fixing sleeve for fixing the connecting ring.

[0021] In some embodiments, the first fixing sleeve, the second fixing sleeve, and the connecting ring are all made of stainless steel material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the low-voltage anti-backfeeding power supply device provided by the embodiment of the present application;

[0023] Figure 2 is a cross-sectional structural schematic diagram of the low-voltage anti-backfeeding power supply device provided by the embodiment of the present application;

[0024] Figure 3 is a cross-sectional structural schematic diagram of the first fixing sleeve provided by the embodiment of the present application;

[0025] Figure 4 is a cross-sectional structural schematic diagram of the connecting ring provided by the embodiment of the present application;

[0026] Among them, the reference numerals in the figure are as follows:

[0027] 1, first fixing sleeve; 11, second fixing sleeve; 12, connecting ring; 13, fastening ring; 14, connecting groove; 2, sealing assembly; 21, sliding sealing plate; 22, abutting spring; 23, sealing airbag; 24, air guide pipe; 25, abutting ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Based on this, in order to improve the technical problem in the related art that in places where electrical equipment and lines need to be frequently replaced, there is a lack of seals, resulting in the cable being eroded by environmental factors and the insulation layer being damaged, the embodiments of the present application provide the following solutions.

[0029] Please refer to Figures 1 to 4 together. The embodiment of the present application provides a low-voltage anti-backfeeding power supply device. The low-voltage anti-backfeeding power supply device includes a first fixing sleeve 1 for fixing the incoming cable; a second fixing sleeve 11 for fixing the outgoing cable; a connecting ring 12, one end of which is threadedly connected to the first fixing sleeve 1 and the other end is threadedly connected to the second fixing sleeve 11 for movably connecting the first fixing sleeve 1 and the second fixing sleeve 11; and a sealing assembly 2 provided on the first fixing sleeve 1 and the second fixing sleeve 11 for sealing the connection part of the incoming cable and the outgoing cable from the outside.

[0030] In some embodiments, please refer to Figures 1 to 3, the sealing assembly 2 includes a sealing airbag 23 disposed on the first fixing sleeve 1 and the second fixing sleeve 11 for sealing the incoming cable and the outgoing cable; an abutting ring 25. Connecting grooves 14 are formed on both the first fixing sleeve 1 and the second fixing sleeve 11. The abutting ring 25 is disposed on the connecting ring 12 and is slidably connected in the connecting groove 14 for compressing the gas in the connecting groove 14 into the sealing airbag 23 to seal the incoming cable and the outgoing cable. A sliding sealing plate 21 is slidably connected in the connecting groove 14. One end of the sliding sealing plate 21 abuts against the abutting ring 25. Abutting springs 22 are further disposed in the connecting groove 14. One end of the abutting spring 22 abuts against the sliding sealing plate 21, and the other end of the abutting spring 22 abuts against the first fixing sleeve 1. Air ducts 24 are further disposed on the first fixing sleeve 1 and the second fixing sleeve 11. One end of the air duct 24 communicates with the connecting groove 14, and the other end of the air duct 24 communicates with the sealing airbag 23.

[0031] With such a setting, when the user connects the incoming cable and the outgoing cable using the low-voltage anti-backfeeding power supply device, the incoming cable is connected to the first fixing sleeve 1, and the outgoing cable is connected to the second fixing sleeve 11. The first fixing sleeve 1 and the second fixing sleeve 11 are fixed by the connecting ring 12. During the process of rotating the connecting ring 12, the first fixing sleeve 1, and the second fixing sleeve 11, the abutting ring 25 on the connecting ring 12 compresses the abutting ring 25 in the connecting groove 14, and the abutting ring 25 compresses the abutting spring 22, thereby compressing the gas in the connecting groove 14 through the air duct 24 into the sealing airbag 23. The sealing airbag 23 expands, thereby sealing the incoming cable and the outgoing cable. When it is necessary to release the incoming cable and the outgoing cable, the connection between the connecting ring 12 and the first fixing sleeve 1 and the second fixing sleeve 11 is released. The abutting plate on the connecting ring 12 releases the pressing on the sliding sealing plate 21. The sliding sealing plate 21 rebounds by the compression of the abutting spring 22, and the gas in the sealing airbag 23 is inhaled into the connecting groove 14 through the air duct 24, releasing the seal on the incoming cable and the outgoing cable. In this way, through the interaction of the abutting ring 25, the abutting spring 22, and the sealing airbag 23, dynamic sealing is achieved. This sealing method can effectively prevent external dust, moisture, and other pollutants from entering the cable connection, thereby improving the reliability and service life of the device. The expansion and contraction of the sealing airbag 23 can be adaptively adjusted according to the diameter and shape of the cable, ensuring that the sealing effect remains good under different conditions, can adapt to different diameters and types of cables, and has good versatility. By adjusting the expansion degree of the sealing airbag 23, it can ensure good sealing effects for cables of different sizes, reducing failures caused by problems such as loose or damp cable connections, thereby improving the stability of the entire power supply system.

[0032] In some embodiments, please refer to Figure 1A fastening ring 13 is threadedly connected to the first fixing sleeve 1 and the second fixing sleeve 11 for fixing the connecting ring 12. The first fixing sleeve 1, the second fixing sleeve 11 and the connecting ring 12 are all made of stainless steel.

[0033] With such a configuration, stainless steel has excellent corrosion resistance and can be used for a long time in harsh environments such as humidity, acidity, alkalinity, etc. without being prone to rust or corrosion. This allows the device to maintain good performance and appearance under various environmental conditions. Stainless steel is a high-strength material that can withstand greater mechanical stress and impact force, which makes the device more sturdy and durable during use and reduces the risk of damage due to external forces. Through simple operation of the connecting ring 12 and the fastening ring 13, the user can quickly complete the connection and sealing of the cable, as well as quickly release the seal and remove the cable when necessary. This design greatly improves work efficiency and reduces the time cost of installation and maintenance.

[0034] The implementation principle of a low-voltage anti-reverse power supply device in the embodiment of the present application is as follows: when the user uses the low-voltage anti-reverse power supply device to connect the incoming cable and the outgoing cable, the incoming cable is connected to the first fixing sleeve 1, the outgoing cable is connected to the second fixing sleeve 11, and the first fixing sleeve 1 and the second fixing sleeve 11 are fixed by the connecting ring 12. In the process of rotating the connecting ring 12 and the first fixing sleeve 1 and the second fixing sleeve 11, the abutting ring 25 on the connecting ring 12 is compressed in the connecting groove 14, and the abutting ring 25 compresses the abutting spring 22, thereby compressing the connecting groove 14. 4 passes through the air guide tube 24 to the sealing air bag 23, and the sealing air bag 23 expands, thereby sealing the incoming cable and the outgoing cable. When the incoming cable and the outgoing cable need to be released, the connection between the connecting ring 12 and the first fixing sleeve 1 and the second fixing sleeve 11 is released by loosening the fastening ring 13, and the abutment plate on the connecting ring 12 releases the tight pressure on the sliding sealing plate 21. The sliding sealing plate 21 rebounds through the compression of the abutment spring 22, and the gas in the sealing air bag 23 is sucked into the connecting groove 14 through the air guide tube 24, thereby releasing the sealing of the incoming cable and the outgoing cable.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A low-voltage anti-backfeeding power supply device, characterized in that Including: A first fixing sleeve (1) for fixing the incoming cable; A second fixing sleeve (11) for fixing the outgoing cable; A connecting ring (12) whose one end is threadedly connected to the first fixing sleeve (1) and the other end is threadedly connected to the second fixing sleeve (11); A sealing assembly (2) provided on the first fixing sleeve (1) and the second fixing sleeve (11) for sealing the connection part of the incoming cable and the outgoing cable from the outside; The sealing assembly (2) includes, A sealing airbag (23) provided on the first fixing sleeve (1) and the second fixing sleeve (11) for sealing the incoming cable and the outgoing cable; An abutting ring (25), connection grooves (14) are formed on both the first fixing sleeve (1) and the second fixing sleeve (11), the abutting ring (25) is arranged on the connecting ring (12) and is slidably connected in the connection groove (14) for compressing the gas in the connection groove (14) into the sealing airbag (23) to seal the incoming cable and the outgoing cable.

2. The low-voltage anti-backward power supply device according to claim 1, wherein: A sliding sealing plate (21) is slidably connected in the connection groove (14), and one end of the sliding sealing plate (21) abuts against the abutting ring (25).

3. The low-voltage anti-backward power supply device according to claim 2, wherein: Abutting springs (22) are further arranged in the connection groove (14), one end of the abutting spring (22) abuts against the sliding sealing plate (21), and the other end of the abutting spring (22) abuts against the first fixing sleeve (1).

4. The low-voltage anti-backfeeding power supply device according to claim 3, characterized in that: Air guide pipes (24) are further provided on the first fixing sleeve (1) and the second fixing sleeve (11), one end of the air guide pipe (24) is communicated with the connection groove (14), and the other end of the air guide pipe (24) is communicated with the sealing airbag (23).

5. A low-voltage anti-backfeeding power supply device according to claim 4, characterized in that: Tightening rings (13) are further threadedly connected to the first fixing sleeve (1) and the second fixing sleeve (11) for fixing the connecting ring (12).

6. The low-voltage anti-backfeeding power supply device according to claim 5, characterized in that: The first fixing sleeve (1), the second fixing sleeve (11) and the connecting ring (12) are all made of stainless steel material.

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