A leakage current protection device for extinguishing electric arc

Abstract

This utility model discloses a leakage current protection device for extinguishing electric arc, including a cabinet. One side of the cabinet is provided with an openable door panel. The door panel is provided on one side of the cabinet via a connecting component. A locking component is provided between the cabinet and the door panel. An air blowing component for blowing air onto the cabinet is provided inside the door panel. By placing the air blowing component inside the door panel, and by enabling the door panel to be easily disassembled and locked from the cabinet, it makes it more convenient for personnel to use and install the equipment.

Description

Technical Field

[0001] This utility model relates to the field of leakage current protection technology, specifically a leakage current protection device for extinguishing electric arcs. Background Technology

[0002] Residual current devices (RCDs) are a common existing technology, typically installed in switch cabinets and connected to power lines to protect against leakage current to electrical circuits or appliances. Because RCDs generate electric arcs upon operation, which are highly hazardous, current technology uses optical sensors in conjunction with corresponding arc-extinguishing devices to achieve the arc-extinguishing protection function of the RCD. The drawback of existing technology is that the arc-extinguishing devices and optical sensors are mostly installed on the cabinet, making disassembly and maintenance inconvenient for personnel. Extensive research has been conducted to address this issue. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a leakage current protection device for extinguishing electric arc, which can solve the problems in the prior art.

[0004] This utility model is achieved through the following technical solution: A leakage protection device for extinguishing electric arc of this utility model includes a cabinet, and a door panel that can be opened and closed is provided on one side of the cabinet. The door panel is provided on one side of the cabinet through a connecting component, a locking component is provided between the cabinet and the door panel, and an air blowing component for blowing air onto the cabinet is provided inside the door panel.

[0005] A further technical solution includes a placement cavity disposed on one side of the cabinet, a slot disposed inside the placement cavity, and connecting columns disposed at the upper and lower ends of the door panel. The connecting columns are inserted into the slot and the placement cavity. Bolts are disposed inside the cabinet and are threadedly connected to the connecting columns.

[0006] A further technical solution includes a locking component comprising an end housing disposed at the side end of the door panel, wherein the end housing is provided with a plug-in hole, and the side of the cabinet is provided with a plug-in structure that can be elastically plugged into the plug-in hole.

[0007] A further technical solution includes a mating bracket disposed on one side of the cabinet, a fixing block disposed on one side of the mating bracket, a plurality of guide rods disposed on one side of the fixing block, a sliding block slidably disposed inside the mating bracket, the sliding block slidably engaging with the guide rods, and an elastic assembly disposed between the guide rods and the sliding block.

[0008] In a further technical solution, a connecting plate is provided on the outer surface of the sliding block.

[0009] A further technical solution includes an elastic assembly comprising a guide hole disposed within the sliding block, a guide rod slidably connected to the guide hole, and a buffer spring disposed within the guide hole, the buffer spring elastically connecting the sliding block and the guide rod.

[0010] A further technical solution includes an air blowing assembly comprising multiple sets of first mounting holes and second mounting holes disposed within the door panel, an air blowing assembly for air blowing disposed within the door panel, and a sealing assembly for sealing the first mounting holes and second mounting holes disposed within the door panel.

[0011] A further technical solution includes an air blowing assembly comprising a photosensitive sensor disposed in the second mounting hole, a nozzle disposed in the first mounting hole, a four-way solenoid valve disposed in the door panel, an air inlet pipe disposed on one side of the four-way solenoid valve, and multiple air outlet pipes disposed on the other side of the four-way solenoid valve, the air outlet pipes being connected to the nozzle, a controller disposed in the door panel, the four-way solenoid valve being electrically connected to the controller, and the photosensitive sensor being electrically connected to the controller.

[0012] Advantageously, the sealing assembly includes a first sealing plug and a second sealing plug, the first sealing plug being threadedly connected to the first mounting hole, and the second sealing plug being threadedly connected to the second mounting hole.

[0013] The beneficial effects of this utility model are: First, by setting the air blowing component inside the door panel, and by enabling the door panel to be easily disassembled and locked from the cabinet, it makes it more convenient for personnel to use and install the equipment.

[0014] Second, since the brightness change after the electric arc is generated triggers any light sensor, all air blowing components will blow gas toward the cabinet to extinguish the arc. The nozzles are set as diffusion nozzles, and an array of nozzles composed of multiple air blowing components is used to extinguish the arc in the entire area inside the cabinet. That is, the number is used to cover the entire area inside the cabinet and extinguish the arc in one go. The specific number of air blowing components can be flexibly arranged to meet actual needs. For example, when the size of the cabinet is large, more air blowing components need to be set to cover the whole area, which improves the arc extinguishing effect. Attached Figure Description

[0015] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of a leakage current protection device for extinguishing electric arc according to the present invention; Figure 2 for Figure 1 A schematic diagram at point A in the middle; Figure 3 for Figure 1A schematic diagram of the internal structure of the device. Figure 4 for Figure 3 A schematic diagram at point B in the middle; Figure 5 for Figure 3 A schematic diagram at point C in the middle; Figure 6 for Figure 1 A schematic diagram of the structure of the device after the cover plate is removed; Figure 7 for Figure 6 A schematic diagram at point D in the middle; In the figure, the components are: cover plate 12, door panel 13, cabinet body 14, fixing block 15, guide rod 16, connecting plate 17, mating bracket 18, sliding block 21, first mounting hole 22, second mounting hole 23, end housing 24, insertion hole 25, buffer spring 31, guide hole 32, first sealing plug 41, second sealing plug 42, four-way solenoid valve 44, air inlet pipe 45, air outlet pipe 46, light sensor 47, nozzle 48, controller 49, connecting column 52, slot 53, bolt 54, and placement cavity 55. Detailed Implementation

[0017] like Figures 1-7 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The projection relationship of the device is consistent in the up, down, left, right, front and back directions. The present invention provides a leakage protection device for extinguishing electric arc, which includes a cabinet 14. A door panel 13 that can be opened and closed is provided on one side of the cabinet 14. The door panel 13 is set on one side of the cabinet 14 through a connecting component. A locking component is provided between the cabinet 14 and the door panel 13 to lock and fix the door panel 13 to the cabinet 14 when the door panel 13 is in the closed state. An air blowing component is provided inside the door panel 13 to blow air through the leakage protection switch inside the cabinet 14.

[0018] Advantageously, the connecting component includes a placement cavity 55 disposed on one side of the cabinet 14, a slot 53 disposed inside the placement cavity 55, and connecting columns 52 disposed at the upper and lower ends of the door panel 13. The connecting columns 52 are inserted into the slot 53 and the placement cavity 55. Bolts 54 are disposed inside the cabinet 14, and the bolts 54 are threadedly connected to the connecting columns 52, so that the door panel 13 is hinged to one side of the cabinet 14, which facilitates the overall disassembly and assembly of the door panel 13.

[0019] Advantageously, the locking component includes an end housing 24 disposed at the side end of the door panel 13, an insertion hole 25 disposed inside the end housing 24, and an insertion structure that is elastically inserted and fixed to the insertion hole 25 on the side of the cabinet 14.

[0020] Advantageously, the plug-in structure includes a mating bracket 18 disposed on one side of the cabinet 14, a fixing block 15 disposed on one side of the mating bracket 18, a plurality of guide rods 16 disposed on one side of the fixing block 15, a sliding block 21 slidably disposed inside the mating bracket 18, the sliding block 21 slidably engaging with the guide rods 16, and an elastic assembly disposed between the guide rods 16 and the sliding block 21.

[0021] Advantageously, a connecting plate 17 is provided on the outer surface of the sliding block 21 to facilitate personnel to pull the sliding block 21.

[0022] Advantageously, the elastic assembly includes a guide hole 32 disposed in the sliding block 21, a guide rod 16 slidably connected to the guide hole 32, and a buffer spring 31 disposed in the guide hole 32. One end of the buffer spring 31 is connected to the guide rod 16, and the other end of the buffer spring 31 is connected to the end wall of the guide hole 32, so that the buffer spring 31 elastically connects the sliding block 21 and the guide rod 16.

[0023] Advantageously, the air blowing assembly includes multiple sets of first mounting holes 22 and second mounting holes 23 disposed in the door panel 13. The second mounting holes 23 are disposed on one side of the first mounting holes 22. The first mounting holes 22 and the second mounting holes 23 are opposite to the leakage protection switch or other switch in the cabinet 14. The door panel 13 is provided with an air blowing assembly for air blowing. The door panel 13 is also provided with a sealing assembly that seals the first mounting holes 22 and the second mounting holes 23, so as to seal the first mounting holes 22 and the second mounting holes 23 that are not provided with the air blowing assembly.

[0024] Advantageously, the air blowing assembly includes a photosensitive sensor 47 disposed in the second mounting hole 23, a nozzle 48 disposed in the first mounting hole 22, a four-way solenoid valve 44 disposed in the door panel 13, an air inlet pipe 45 disposed on one side of the four-way solenoid valve 44, and multiple air outlet pipes 46 disposed on the other side of the four-way solenoid valve 44, the air outlet pipes 46 being connected to the nozzle 48, a controller 49 disposed in the door panel 13, the four-way solenoid valve 44 being electrically connected to the controller 49, and the photosensitive sensor 47 being electrically connected to the controller 49. The photosensitive sensor 47 senses the arc light and then transmits an electrical signal to the controller 49. The controller 49 controls the four-way solenoid valve 44 to work. Since there is a solenoid valve between the four-way solenoid valve 44 and the air outlet pipes 46, after the air outlet pipes 46 are ventilated, the nozzle 48 on the side of the photosensitive sensor 47 will blow air, thus realizing the air blowing function.

[0025] Advantageously, the sealing assembly includes a first sealing plug 41 and a second sealing plug 42, the first sealing plug 41 being threadedly connected to a first mounting hole 22, and the second sealing plug 42 being threadedly connected to a second mounting hole 23.

[0026] A cover plate 12 is fastened to the front of the door panel 13. An air inlet pipe 45 passes through the cover plate 12 and is connected to an air storage tank in the external space. The air storage tank stores gas, which can be air or other insulating gases. A compressor can be installed on one side of the air storage tank to pressurize the gas into the air storage tank. Valves can also be installed at the inlet and outlet of the air storage tank to control the gas entering and leaving the air storage tank. Since this technology is a common existing technology, it will not be disclosed in further detail.

[0027] Advantageously, the sealing assembly includes a second sealing plug 42 that is threadedly connected to the second mounting hole 23, and a first sealing plug 41 that is threadedly connected to the first mounting hole 22. After the door panel 13 and the cabinet 14 are closed, the inside of the cabinet 14 is in a low-light state. The first sealing plug 41 and the second sealing plug 42 serve to seal the first mounting hole 22 and the second mounting hole 23 to prevent light leakage. If an electric arc is generated inside the cabinet 14, whether it is generated by a switch or a wiring point, it will increase the light intensity inside the cabinet 14, thereby triggering the corresponding electrical signal of the light sensor 47. Since the leakage protection switch or other switches have indicator lights, the personnel need to adjust the sensing intensity of the light sensor 47 in advance during the specific setting so as to correctly trigger the electrical signal according to the occurrence of the electric arc.

[0028] Since the brightness change after the electric arc is generated triggers any one of the light sensors 47, all the air blowing components will blow gas toward the cabinet 14 to extinguish the arc. The nozzle 48 can be set as a diffusion nozzle, using a nozzle array composed of multiple air blowing components to extinguish the arc in the entire area inside the cabinet 14. That is, the number is used to cover the entire area inside the cabinet 14 and extinguish the arc at once. The specific number of air blowing components can be flexibly arranged to meet actual needs. For example, when the size of the cabinet 14 is large, more air blowing components need to be set to cover the whole area.

[0029] By placing the air blowing component inside the door panel 13, and by allowing the door panel 13 to be easily disassembled and locked from the cabinet 14, it makes it more convenient for personnel to use and install the equipment.

[0030] After rotating the bolt 54, the bolt 54 is disengaged from the threaded connection with the connecting column 52, and the connecting column 52 is disengaged from the slot 53, allowing the door panel 13 to be removed.

[0031] After being pulled by the connecting plate 17, the sliding block 21 moves close to the guide rod 16, causing the sliding block 21 to disengage from the insertion hole 25, so that the door panel 13 can be disengaged from the cabinet 14 and the cabinet 14 is in an open state, making it convenient for personnel to install leakage protection switches or other switches inside the cabinet 14.

[0032] The four-way solenoid valve 44 is a common existing technology. The solenoid valve enables the connection and control of multiple air outlet pipes 46 on one side, thereby enabling the nozzle 48 to perform the function of spraying air after air is introduced.

[0033] The controller 49 is existing technology and can use a microcontroller or other circuit board or wires to achieve electrical connection and control functions with other components.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A leakage current protection device for extinguishing electric arc, comprising a cabinet (14), wherein one side of the cabinet (14) is provided with an openable door (13), characterized in that, The door panel (13) is set on one side of the cabinet (14) by a connecting component. A locking component is provided between the cabinet (14) and the door panel (13). An air blowing component for blowing air onto the cabinet (14) is provided inside the door panel (13). The air blowing assembly includes multiple sets of first mounting holes (22) and second mounting holes (23) disposed in the door panel (13). The door panel (13) is provided with an air blowing assembly for air blowing. The door panel (13) is also provided with a sealing assembly that seals the first mounting holes (22) and the second mounting holes (23). The air blowing assembly includes a photosensitive sensor (47) disposed in the second mounting hole (23), a nozzle (48) disposed in the first mounting hole (22), a four-way solenoid valve (44) disposed in the door panel (13), an air inlet pipe (45) disposed on one side of the four-way solenoid valve (44), and multiple air outlet pipes (46) disposed on the other side of the four-way solenoid valve (44), the air outlet pipes (46) being connected to the nozzle (48), a controller (49) disposed in the door panel (13), the four-way solenoid valve (44) being electrically connected to the controller (49), and the photosensitive sensor (47) being electrically connected to the controller (49).

2. The leakage current protection device for extinguishing electric arc according to claim 1, characterized in that: The connecting assembly includes a placement cavity (55) disposed on one side of the cabinet (14), a slot (53) is provided inside the placement cavity (55), and connecting columns (52) are provided at the upper and lower ends of the door panel (13). The connecting columns (52) are inserted into the slot (53) and the placement cavity (55). A bolt (54) is provided inside the cabinet (14), and the bolt (54) is threadedly connected to the connecting column (52).

3. The leakage current protection device for extinguishing electric arc according to claim 1, characterized in that: The locking assembly includes an end housing (24) disposed at the side end of the door panel (13), the end housing (24) having a plug hole (25) therein, and the side of the cabinet (14) having a plug-in structure that can be elastically plugged into the plug hole (25).

4. The leakage current protection device for extinguishing electric arc according to claim 3, characterized in that: The plug-in structure includes a mating bracket (18) disposed on one side of the cabinet (14), a fixing block (15) disposed on one side of the mating bracket (18), a plurality of guide rods (16) disposed on one side of the fixing block (15), a sliding block (21) slidably disposed inside the mating bracket (18), the sliding block (21) slidably engaging with the guide rods (16), and an elastic assembly disposed between the guide rods (16) and the sliding block (21).

5. A leakage current protection device for extinguishing electric arc according to claim 4, characterized in that: A connecting plate (17) is provided on the outer surface of the sliding block (21).

6. The leakage current protection device for extinguishing electric arc according to claim 4, characterized in that: The elastic assembly includes a guide hole (32) disposed in the sliding block (21), the guide rod (16) is slidably connected to the guide hole (32), and a buffer spring (31) is disposed in the guide hole (32), the buffer spring (31) elastically connecting the sliding block (21) and the guide rod (16).

7. A leakage current protection device for extinguishing electric arc according to claim 1, characterized in that: The sealing assembly includes a first sealing plug (41) and a second sealing plug (42), wherein the first sealing plug (41) is threadedly connected to the first mounting hole (22) and the second sealing plug (42) is threadedly connected to the second mounting hole (23).

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