Power supply system of power cabinet
By combining cabinet door control power supply and overcurrent protection components, the safety hazards of the power cabinet in the event of a fault are solved, the safe power supply and real-time monitoring of the circuit are realized, the electrical sparks and equipment damage are prevented, and the safety and stability of the power cabinet are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-07
AI Technical Summary
When the power cabinet malfunctions, it is prone to generating electric sparks, arcs, or high temperatures, which can lead to combustion or explosion. Furthermore, operators cannot obtain information about the circuit status in a timely manner, posing a safety hazard.
The power supply is controlled by the cabinet door opening and closing mechanism, combined with overcurrent protection devices. Through components such as contact switches, fuses, circuit breakers and current transformers, the circuit can be safely powered and protected against overcurrent, preventing electric sparks and equipment damage.
It effectively prevents electrical sparks from being generated in the environment, protects equipment safety, ensures stable circuit operation, provides real-time circuit status display and flammable gas detection, and improves safety.
Smart Images
Figure CN224097231U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power cabinet technology, and in particular relates to a power cabinet power supply system. Background Technology
[0002] A power cabinet is a combination of electrical equipment used for centralized control, distribution, and protection of power systems. It realizes the functions of monitoring, controlling, protecting, and distributing power systems. Power cabinets are widely used in power systems in various places such as industry, commerce, and residence. They play an important role in distributing electrical energy, controlling the on / off state of circuits, and protecting electrical equipment from overload, short circuit, and other faults. They are one of the key devices to ensure the safe and stable operation of power systems.
[0003] In terms of structural design, when electrical components inside the power cabinet malfunction and generate electric sparks, arcs, or high temperatures, they can easily ignite or explode surrounding flammable and explosive materials, threatening personnel safety and the stable operation of production equipment. Furthermore, when abnormal conditions such as overcurrent or short circuits occur, operators cannot obtain crucial information such as the circuit's operating status and the concentration of flammable gases in the environment in a timely manner. Therefore, a power cabinet power supply system is needed that uses the opening and closing of the cabinet door to control the power supply and cutoff, effectively preventing the generation of electric sparks in the environment. Simultaneously, it should be combined with an overcurrent protection device to prevent circuit damage to primary equipment. Utility Model Content
[0004] The purpose of this utility model is to provide a power supply system for an electrical cabinet, which uses the opening and closing of the cabinet door to control the power supply and cut-off inside the cabinet, effectively preventing the generation of electrical sparks in the environment. At the same time, it is combined with an overcurrent protection device to prevent circuit damage to primary equipment, thereby solving the above-mentioned technical problems.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A power supply system for an electric cabinet includes an explosion-proof electric cabinet body. A protective box is fixedly installed inside the cavity of the explosion-proof electric cabinet body. A circuit board is fixedly installed on the rear side of the cavity of the protective box. An overcurrent protection component is provided on the surface of the circuit board. A power control component is provided at the front end of the right side of the cavity of the explosion-proof electric cabinet body. The power control component includes a fixed shell fixedly connected to the right side of the explosion-proof electric cabinet body. A touch switch is fixedly installed on the right side of the cavity of the fixed shell body. The touch switch is electrically connected to the main line of the explosion-proof electric cabinet body. An extrusion plate is provided inside the cavity of the fixed shell body. Rotating columns are fixedly connected to the right side of the top and bottom of the extrusion plate body. A torsion spring is sleeved on the surface of the rotating column body. One end of the torsion spring is welded to the extrusion plate body, and the other end of the torsion spring is welded to the fixed shell body. A cabinet door is rotatably connected to the left side of the explosion-proof electric cabinet body. A gas sensor is fixedly installed on the top of the explosion-proof electric cabinet body.
[0006] Preferably, the overcurrent protection assembly includes two fuses: FU1 and FU2, two indicator lights: a green light and a red light, two resistors: R1 and R2, a circuit breaker: QF; a trip coil: YR; an intermediate relay contact: KM; two current transformers: TA1 and TA2; and a current relay: KA.
[0007] Preferably, a pulley is rotatably connected to the left side of the extrusion plate, and the surface of the pulley slides in contact with the inside of the cabinet door.
[0008] Preferably, tempered glass is embedded and fixed at the top of the outer side of the cabinet door, and a display screen is fixedly installed on the right end of the tempered glass near the explosion-proof power cabinet.
[0009] Preferably, the surface of the cabinet door is provided with a lock.
[0010] Preferably, multiple branch switches are fixedly installed at the bottom of the rear side of the explosion-proof power cabinet.
[0011] The beneficial effects of this utility model are:
[0012] 1. This utility model provides a relatively enclosed operating environment for electrical components through the combined use of explosion-proof power cabinet and cabinet door. At the same time, with the cooperation of overcurrent protection components, it can play the role of overcurrent protection for the main circuit of the explosion-proof power cabinet. Furthermore, with the cooperation of power control components, it can realize a safe power supply mode of turning on and off the power supply, thereby achieving the purpose of preventing current overload and effectively preventing safety accidents.
[0013] 2. This utility model, through the setting of overcurrent protection components, including fuses FU1 and FU2, can prevent damage to other components when the circuit is short-circuited. The use of red and green lights can clearly reflect the circuit status to the user. At the same time, with the cooperation of trip coil YR, current transformers TA1 and TA2 and circuit breaker QF, overcurrent protection is achieved to prevent damage to primary equipment.
[0014] 3. With the combined use of the display screen and tempered glass, this utility model can present the red and green light status to the user while keeping the explosion-proof power cabinet and the inner cavity of the cabinet door relatively sealed. At the same time, it can also display the content of flammable gas in the air detected by the gas sensor. Attached Figure Description
[0015] in:
[0016] Figure 1 This is a front view schematic diagram of one embodiment of the present utility model;
[0017] Figure 2 This is a three-dimensional schematic diagram of a power control component according to an embodiment of the present invention;
[0018] Figure 3 This is an exploded perspective view of a power control component according to an embodiment of the present invention.
[0019] Figure 4 This is a circuit diagram of an overcurrent protection component according to an embodiment of the present invention.
[0020] The attached diagram lists the components represented by each number as follows:
[0021] 1. Explosion-proof electrical cabinet; 2. Protective box; 3. Circuit board; 4. Overcurrent protection assembly; 5. Power control assembly; 51. Fixed shell; 52. Point contact switch; 53. Extrusion plate; 54. Rotating column; 55. Torsion spring; 6. Pulley; 7. Cabinet door; 8. Gas sensor; 9. Tempered glass; 10. Display screen; 11. Lock; 12. Branch switch. Detailed Implementation
[0022] In the following description, embodiments of the power supply system of the power cabinet of this utility model will be described with reference to the accompanying drawings.
[0023] Figure 1-4This invention illustrates a power supply system for a power cabinet according to an embodiment of the present invention. The system includes an explosion-proof power cabinet 1. A protective box 2 is fixedly installed inside the cavity of the explosion-proof power cabinet 1. A circuit board 3 is fixedly installed on the rear side of the cavity of the protective box 2. An overcurrent protection component 4 is provided on the surface of the circuit board 3. The overcurrent protection component 4 includes two fuses: FU1 and FU2; two indicator lights: a green light and a red light; two resistors: R1 and R2; a circuit breaker: QF; a trip coil: YR; an intermediate relay contact: KM; two current transformers: TA1 and TA2; and a current relay: KA. Through the overcurrent protection component 4, including fuses FU1 and FU2, damage to other components can be prevented during a short circuit. The combined use of red and green lights clearly indicates the circuit status to the user. Simultaneously, with the coordinated use of trip coil YR, current transformers TA1 and TA2, and circuit breaker QF, overcurrent protection is achieved to prevent damage to primary equipment. A power control component 5 is located at the front end of the right side of the explosion-proof power cabinet 1. The power control component 5 includes a fixed housing 51 fixedly connected to the right side of the explosion-proof power cabinet 1. A [missing information - likely a device or component] is fixedly installed on the right side of the inner cavity of the fixed housing 51. A touch switch 52 is electrically connected to the main power line of the explosion-proof power cabinet 1. A pressing plate 53 is installed inside the cavity of the fixed housing 51. A pulley 6 is rotatably connected to the left side of the pressing plate 53. The surface of the pulley 6 slides in contact with the inside of the cabinet door 7. A tempered glass 9 is embedded and fixed at the top of the outer side of the cabinet door 7. A display screen 10 is fixedly installed on the right end of the tempered glass 9 near the explosion-proof power cabinet 1. Through the combined use of the display screen 10 and the tempered glass 9, a red light and a green light can be displayed to the user while maintaining the relative enclosure of the explosion-proof power cabinet 1 and the inner cavity of the cabinet door 7. The indicator light displays the status of the gas and allows the user to view the flammable gas content in the air detected by the gas sensor 8. The cabinet door 7 is equipped with a lock 11. Rotating columns 54 are fixedly connected to the right side of the top and bottom of the extrusion plate 53. Torsion springs 55 are sleeved on the surface of the rotating columns 54. One end of the torsion spring 55 is welded to the extrusion plate 53, and the other end of the torsion spring 55 is welded to the fixed shell 51. The cabinet door 7 is rotatably connected to the left side of the explosion-proof power cabinet 1. The gas sensor 8 is fixedly installed on the top of the explosion-proof power cabinet 1. Multiple branch switches 12 are fixedly installed at the bottom of the rear side of the inner cavity of the explosion-proof power cabinet 1.
[0024] Working principle: When using this utility model, when the user opens the cabinet door 7, they first check the display screen 10 to detect the presence or amount of combustible gas in the environment detected by the gas sensor 8. When it is within the safe threshold, the user unlocks the cabinet door 7 through the lock 11 and opens the cabinet door 7. During the rotation of the cabinet door 7, it moves away from the front side of the protective box 2. At this time, the pressing plate 53 rotates forward under the elastic force of the torsion spring 55, causing the sliding pin contact inside the touch switch 52 to disengage, cutting off the power to the main circuit of the explosion-proof power cabinet 1, thus cutting off the power to all electrical components under the main circuit, thereby preventing the generation of electrical sparks in the electrical components. When closing the cabinet door 7, the cabinet door 7 presses the pressing plate 53, causing the pressing plate 53 to rotate and press the sliding pin contact of the touch switch 52 until the cabinet door 7 is completely closed. Then the touch switch 52 is energized to supply power to the electrical components inside the explosion-proof power cabinet 1.
[0025] During the operation of the overcurrent protection component (4), AC power is introduced through WC(~A) (phase A) and WC(~N) (neutral line). Fuse FU1 is connected in series on the WC(~A) phase line and FU2 is connected in series on the WC(~N) neutral line line to prevent damage to other components when the circuit is short-circuited. The green light is connected in series with resistor R1. One end of the green light is connected to the WC(~A) phase line after FU1, and the other end is connected to the 1-2 auxiliary contacts of circuit breaker QF. The other end of the 1-2 contacts of QF is connected to the WC(~N) neutral line line after FU2. When QF is in the open state, contacts 1-2 are open and the green light is off. When QF is closed, contacts 1-2 are closed, the green light is lit through R1, and the red light is connected in series with resistor R2. One end of the red light is connected to the WC(~A) phase line after FU1, and the other end is connected to the 3-4 auxiliary contact of the circuit breaker QF. The other end of the 3-4 contact of QF is connected to the trip coil YR and then to the WC(~N) neutral line after FU2. When QF is in the closed state, contacts 3-4 are closed, the red light is lit through R2, and one end of the trip coil YR is connected to the 3-4 auxiliary contact of QF, and the other end is connected to the WC(~N) neutral line after FU2. The intermediate relay contact KM is connected in parallel with the trip coil YR. When KM is closed, the trip coil YR is energized, causing the circuit breaker QF to trip. Current transformers TA1 and TA2 are connected in series in the main circuit, and they are connected to the current relay KA. When the current in the main circuit exceeds the setting value (I>) of the current relay KA, KA operates, and its contacts will trigger the trip coil YR to be energized, realizing overcurrent protection and causing the circuit breaker QF to trip.
[0026] In summary, this power supply system, through the combined use of the explosion-proof power cabinet 1 and the cabinet door 7, provides a relatively enclosed operating environment for electrical components. Simultaneously, with the cooperation of the overcurrent protection component 4, it can provide overcurrent protection for the main circuit of the explosion-proof power cabinet 1. Furthermore, with the cooperation of the power control component 5, it can achieve a safe power supply mode that allows for power on / off and power off, thus preventing current overload and effectively preventing safety accidents.
Claims
1. A power supply system for an electrical cabinet, characterized in that, The system includes an explosion-proof power cabinet (1): a protective box (2) is fixedly installed inside the cavity of the explosion-proof power cabinet (1), a circuit board (3) is fixedly installed on the rear side of the cavity of the protective box (2), an overcurrent protection component (4) is provided on the surface of the circuit board (3), and a power control component (5) is provided at the front end of the right side of the cavity of the explosion-proof power cabinet (1). The power control component (5) includes a fixed shell (51) fixedly connected to the right side of the explosion-proof power cabinet (1), and a point-contact switch (52) is fixedly installed on the right side of the cavity of the fixed shell (51). The point-contact switch (52) is connected to the right side of the cavity of the explosion-proof power cabinet (1). The explosion-proof power cabinet (1) is electrically connected to the main line. The inner cavity of the fixed shell (51) is provided with an extrusion plate (53). The top and bottom right sides of the extrusion plate (53) are fixedly connected with rotating columns (54). The surface of the rotating column (54) is fitted with a torsion spring (55). One end of the torsion spring (55) is welded to the extrusion plate (53), and the other end of the torsion spring (55) is welded to the fixed shell (51). The left side of the explosion-proof power cabinet (1) is rotatably connected with a cabinet door (7). The top of the explosion-proof power cabinet (1) is fixedly installed with a gas sensor (8).
2. The power supply system for a power cabinet according to claim 1, characterized in that, The overcurrent protection assembly (4) includes two fuses: FU1 and FU2, two indicator lights: green and red, two resistors: R1 and R2, one circuit breaker: QF, one trip coil: YR, one intermediate relay contact: KM, two current transformers: TA1 and TA2, and one current relay: KA.
3. The power supply system for a power cabinet according to claim 2, characterized in that, The left side of the extrusion plate (53) is rotatably connected to a pulley (6), and the surface of the pulley (6) slides in contact with the inside of the cabinet door (7).
4. The power supply system for a power cabinet according to claim 3, characterized in that, Tempered glass (9) is embedded and fixed on the top of the outer side of the cabinet door (7), and a display screen (10) is fixedly installed on the right end of the tempered glass (9) near the explosion-proof power cabinet (1).
5. A power supply system for a power cabinet according to claim 4, characterized in that, The cabinet door (7) is equipped with a lock (11) on its surface.
6. The power supply system for a power cabinet according to claim 5, characterized in that, Multiple branch switches (12) are fixedly installed at the bottom of the rear side of the inner cavity of the explosion-proof power cabinet (1).