A submersible protection device for an electrical cabinet circuit breaker

Abstract

The utility model relates to a kind of electrical cabinet circuit breaker immersion protection device, effectively solve the problem that electrical cabinet is prone to water-related electric shock accident near cabinet body under extreme immersion environment;The technical solution solved includes physical protection unit, the physical protection unit includes first protection cylinder and second protection cylinder, first protection cylinder lower end is closed, upper end is open, circuit breaker is installed in the upper end of first protection cylinder, and first protection cylinder bottom is equipped with threading hole;Second protection cylinder upper end is closed, lower end is open, second protection cylinder is set in the outside of first protection cylinder, and there is interlayer cavity between first protection cylinder and second protection cylinder, and the sidewall lower part of first protection cylinder is equipped with fan;The utility model is by second protection cylinder and uses the air chamber formed by air pressure, so that even if immersion circuit breaker in electrical cabinet is not submerged by water, and water-related electric shock accident caused by fire line leakage is avoided;The interlayer cavity formed by first protection cylinder and second protection cylinder forms airflow channel, so that circuit breaker can also effectively radiate heat in cylinder.

Description

Technical Field

[0001] This utility model relates to the field of electrical cabinets, specifically a water immersion protection device for electrical cabinet circuit breakers. Background Technology

[0002] An electrical cabinet is a type of electrical equipment mainly used in power systems for opening, closing, controlling, and protecting electrical equipment during power generation, transmission, distribution, and energy conversion. During extreme floods, the cabinet may be submerged, and water ingress can cause short circuits and electrical leaks, posing a significant danger. While almost all switches nowadays have the function of automatically cutting off power to the cabinet upon water ingress, the live wire inside remains energized. Most switches or circuit breakers only offer waterproofing for light rain; in a submerged environment, it's difficult to guarantee that the live wire end connected to it will not be submerged. Water ingress at one end of the live wire will electrify the surrounding water, posing a risk of electric shock to anyone wading through the water.

[0003] Current waterproofing designs for electrical cabinets mostly focus on improving the cabinet's sealing performance. For example, patent application number 201820125683.7, entitled "A Utility Model Patent for a Waterproof Electrical Cabinet," uses sealing strips and waterproof panels to seal the gaps in the cabinet door to improve its waterproofing. However, since electrical cabinets are mostly assembled cabinets with ventilation holes, cable inlets, and outlets, achieving a complete seal under extreme water immersion conditions is almost impossible. Summary of the Invention

[0004] This utility model provides a water immersion protection device for electrical cabinet circuit breakers, which aims to solve the problem that electrical cabinets are prone to water-related electric shock accidents near the cabinet in extreme water immersion environments.

[0005] The technical solution includes a physical protection unit, which includes a first protective cylinder and a second protective cylinder. The first protective cylinder is closed at the lower end and open at the upper end. A circuit breaker is installed at the upper end of the first protective cylinder, and a wire hole is provided at the bottom of the first protective cylinder. The second protective cylinder is closed at the upper end and open at the lower end. The second protective cylinder is sleeved outside the first protective cylinder, and there is an interlayer cavity between the second and the first protective cylinder. A fan is installed on the lower part of the side wall of the first protective cylinder.

[0006] The inner wall of the threading hole is fitted with a sealing ring.

[0007] The outer wall of the first protective cylinder is provided with several horizontal support rods, and the second protective cylinder is supported on the horizontal support rods.

[0008] The lower end of the second protective cylinder has several limiting grooves that correspond one-to-one with the horizontal support rods, and the horizontal support rods are locked in the limiting grooves.

[0009] It also includes a circuit protection unit, which includes two electrode plates, one of which is connected to the live wire downstream of the circuit breaker and the other electrode plate is connected to the neutral wire outside the cabinet. The positions of the two electrode plates are lower than the circuit breaker.

[0010] This invention utilizes the air chamber formed by the second protective cylinder to prevent the circuit breaker inside the electrical cabinet from being submerged in water, thus avoiding water-related electric shock accidents caused by leakage of live wires; the airflow channel formed by the sandwich cavity created by the first and second protective cylinders allows the circuit breaker to effectively dissipate heat inside the cylinder, ensuring safe use. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention.

[0012] Figure 2 This is a perspective view of the physical protection unit of this utility model.

[0013] Figure 3 This is a bottom view of the physical protection unit of this utility model.

[0014] Figure 4 for Figure 2 A cross-sectional view at position AA.

[0015] Figure 5 for Figure 2 Three-dimensional sectional view at position AA.

[0016] Figure 6 Front sectional view of the physical protection unit under immersion conditions. Detailed Implementation

[0017] Referring to the accompanying drawings, this utility model includes a physical protection unit, which includes a first protective cylinder 1 and a second protective cylinder 2. The lower end of the first protective cylinder 1 is closed and the upper end is open. The circuit breaker is installed at the upper end of the first protective cylinder 1. During installation, it is ensured that the operating switch of the circuit breaker protrudes outside the first protective cylinder 1 for manual operation. The bottom of the first protective cylinder 1 is provided with a wire hole 3, through which the cable passes into the first protective cylinder 1 and connects to the circuit breaker. The upper end of the second protective cylinder 2 is closed and the lower end is open. The second protective cylinder 2 is fitted outside the first protective cylinder 1, and there is a cavity between the second and first protective cylinder 1. A fan 4 is installed on the lower part of the side wall of the first protective cylinder 1. The fan 4 blows air into the first protective cylinder 1. The airflow goes upward along the first protective cylinder 1, passes through the circuit breaker and is blown out from the upper end of the first protective cylinder 1, and then goes downward along the cavity between the first and second protective cylinders 1 and is blown out from the lower end of the second protective cylinder 2. The airflow dissipates heat from the circuit breaker.

[0018] The inner wall of the wire hole 3 is equipped with a sealing ring 5 to seal the wire hole 3 and the cable, preventing water leakage.

[0019] The outer wall of the first protective cylinder 1 is provided with several horizontal support rods 6. The second protective cylinder 2 is supported on the horizontal support rods 6. When the circuit breaker needs to be operated manually, the second protective cylinder 2 is lifted up to expose the circuit breaker. After operation, the second protective cylinder 2 is covered again.

[0020] The lower end of the second protective cylinder 2 has several limiting grooves 7 that correspond one-to-one with the horizontal support rods 6. The horizontal support rods 6 are locked in the limiting grooves 7, so that the second protective cylinder 2 will not shake or shift.

[0021] It also includes a circuit protection unit, which includes two electrode plates 8. One electrode plate 8 is connected to the live wire downstream of the circuit breaker, and the other electrode plate 8 is connected to the neutral wire outside the cabinet. The positions of the two electrode plates 8 are lower than the circuit breaker. When water enters the cabinet, it will first submerge the two electrode plates 8, thereby causing a short circuit inside the cabinet. The circuit breaker will automatically disconnect. The short circuit disconnection of the circuit breaker is a conventional technology, which will not be limited or detailed in this article.

[0022] When the cabinet is not submerged in water, the two electrode plates 8 are not connected, the circuit breaker is in a closed state, and the blower 4 starts to blow air into the protective cylinder to dissipate heat from the circuit breaker. When water enters the cabinet, it will first submerge the two electrode plates 8, thereby causing a short circuit in the cabinet. The circuit breaker will automatically disconnect, and all loads in the cabinet, including the blower 4, will be de-energized, but the live wire entering the cabinet will still be energized. When the water level rises to submerge the lower port of the second protective cylinder 2 and the air inlet of the blower 4, the air in the second protective cylinder 2 can no longer be discharged. Under the action of the air pressure in the second protective cylinder 2, even if the water level in the cabinet continues to rise, it cannot enter the first protective cylinder 1. A sealed air chamber is formed in the first protective cylinder 1, so that the circuit breaker and the wire end of the live wire entering the cabinet will not be submerged in water, thus avoiding leakage of electricity from the energized live wire.

[0023] This utility model utilizes the air chamber formed by the second protective cylinder 2 to prevent the circuit breaker inside the electrical cabinet from being submerged in water, thus avoiding water-related electric shock accidents caused by leakage of live wires; the airflow channel formed by the sandwich cavity created by the first protective cylinder 1 and the second protective cylinder 2 allows the circuit breaker to effectively dissipate heat inside the cylinder, ensuring safe use.

Claims

1. A water immersion protection device for an electrical cabinet circuit breaker, comprising a physical protection unit, characterized in that, The physical protection unit includes a first protective cylinder (1) and a second protective cylinder (2). The lower end of the first protective cylinder (1) is closed and the upper end is open. A circuit breaker is installed at the upper end of the first protective cylinder (1). A wire hole (3) is provided at the bottom of the first protective cylinder (1). The upper end of the second protective cylinder (2) is closed and the lower end is open. The second protective cylinder (2) is sleeved outside the first protective cylinder (1) and there is a cavity between the second protective cylinder (2) and the first protective cylinder (1). A fan (4) is installed on the lower part of the side wall of the first protective cylinder (1).

2. The electrical cabinet circuit breaker water immersion protection device according to claim 1, characterized in that, The inner wall of the thread hole (3) is fitted with a sealing ring (5).

3. The electrical cabinet circuit breaker water immersion protection device according to claim 1, characterized in that, The outer wall of the first protective cylinder (1) is provided with several horizontal support rods (6), and the second protective cylinder (2) is supported on the horizontal support rods (6).

4. The electrical cabinet circuit breaker water immersion protection device according to claim 3, characterized in that, The lower end of the second protective cylinder (2) has several limiting grooves (7) that correspond one-to-one with the horizontal support rod (6), and the horizontal support rod (6) is stuck in the limiting groove (7).

5. The electrical cabinet circuit breaker water immersion protection device according to claim 1, characterized in that, It also includes a circuit protection unit, which includes two electrode plates (8), one of which is connected to the live wire downstream of the circuit breaker and the other electrode plate (8) is connected to the neutral wire outside the cabinet. The positions of the two electrode plates (8) are lower than the circuit breaker.

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