Emergency cut-off device for outdoor power distribution cabinet

Abstract

The utility model discloses an outdoor power distribution cabinet emergency cut-off device which comprises a controller, a circuit breaker, a knife switch and a sensor assembly which are installed in a power distribution cabinet, the sensor assembly and the circuit breaker are electrically connected with the controller, the circuit breaker is electrically connected with the knife switch, and an automatic cut-off mechanism connected with a handle of the knife switch is further arranged in the power distribution cabinet. The environment in the cabinet is detected through the sensor assembly, circuit connection of the circuit breaker is closed in time through the controller when abnormity occurs, power supply of the power distribution cabinet is cut off emergently so as to avoid serious loss, meanwhile, when water enters the cabinet, a handle of the disconnecting link can be pushed upwards through the automatic cut-off mechanism, and therefore a circuit is cut off through strong twisting, and the safety of the power distribution cabinet is improved. The situation that equipment such as a circuit breaker and a controller in the cabinet fails and cannot be cut off emergently is avoided, and the safety risk of the outdoor power distribution cabinet in severe weather is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to an emergency cut-off device for an outdoor power distribution cabinet. Background Art

[0002] A distribution cabinet (also called a switch cabinet) is an electrical equipment that centrally distributes electrical energy and is used to control and protect circuits and equipment. The inside of a distribution cabinet usually contains electrical components, such as circuit breakers, contactors, relays, etc., which are used to control the switching of circuits and protect circuits from damage caused by overloads, short circuits and other faults. Some outdoor distribution cabinets are installed in more complex outdoor environments. In rainy areas or seasons, these outdoor distribution cabinets often face problems such as flooding and water ingress, which pose a threat to the normal operation of the distribution cabinets. In severe cases, they may even explode due to short circuits. Existing outdoor distribution cabinets are usually only equipped with air switches or other circuit breakers to avoid damage caused by short circuits. However, when the equipment fails, other means cannot be used for forced disconnection, which poses a certain safety risk. To this end, we propose an emergency disconnection device for outdoor distribution cabinets. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an emergency cut-off device for an outdoor distribution cabinet. The device detects the environment inside the cabinet through a sensor component and promptly closes the circuit connection of the circuit breaker through a controller when an abnormality occurs, thereby urgently cutting off the power supply of the distribution cabinet to avoid serious losses, thereby effectively solving the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an emergency cut-off device for an outdoor power distribution cabinet, comprising a controller, a circuit breaker, a knife switch and a sensor assembly installed in the power distribution cabinet, wherein the sensor assembly and the circuit breaker are electrically connected to the controller, the circuit breaker is electrically connected to the knife switch, and an automatic cut-off mechanism connected to the handle of the knife switch is also provided in the power distribution cabinet.

[0005] As a preferred technical solution of the utility model, the sensor assembly includes a water immersion sensor arranged at the lower side of the distribution cabinet, a vibration sensor arranged at the upper side of the distribution cabinet, and a temperature sensor arranged in the middle of the distribution cabinet.

[0006] As a preferred technical solution of the utility model, the automatic cutting mechanism includes a fixed cylinder installed on the bottom plate inside the distribution cabinet and a fixed column coaxially arranged with the fixed cylinder, a plurality of water inlets are evenly arranged on the lower part of the peripheral surface of the fixed cylinder, a sliding airbag is slidably arranged on the fixed column, a sliding groove corresponding to the fixed column is arranged at the center of the upper surface of the sliding airbag, and a connecting piece connected to the knife switch handle is arranged on the outer side of the sliding groove on the upper surface of the sliding airbag.

[0007] As a preferred technical solution of the utility model, the connecting part includes a plurality of connecting rods evenly arranged on the outside of the sliding groove on the upper surface of the sliding airbag, a sliding sleeve is fixedly arranged on the top end of the connecting rod, the sliding sleeve is arranged on the outside of the fixed column, a push rod is fixedly arranged on the upper surface of the sliding sleeve, and the top end of the push rod is hinged to the handle end of the knife switch.

[0008] As a preferred technical solution of the utility model, the interior of the sliding airbag is sealed, and the internal volume of the sliding airbag is not less than cm.

[0009] As a preferred technical solution of the utility model, the shape of the sliding airbag is cylindrical or spherical.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the environment inside the cabinet is detected by the sensor component, and the circuit connection of the circuit breaker is promptly closed by the controller when an abnormality occurs, and the power supply of the distribution cabinet is urgently cut off to avoid serious losses. At the same time, when water enters the cabinet, the handle of the knife switch can be pushed up through the automatic cutting mechanism, thereby forcibly cutting off the line, avoiding the situation where equipment inside the cabinet such as circuit breakers, controllers, etc. fail and cannot be cut off urgently, greatly reducing the safety risks of outdoor distribution cabinets in bad weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a side view structural schematic diagram of the utility model;

[0013] Figure 3 It is a structural schematic diagram of another embodiment of the utility model.

[0014] In the figure: 1 controller, 2 circuit breaker, 3 vibration sensor, 4 temperature sensor, 5 water immersion sensor, 6 knife switch, 7 fixing cylinder, 8 water inlet, 9 fixing column, 10 sliding airbag, 11 connecting rod, 12 sliding sleeve, 13 pushing rod, 14 sliding groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-3The utility model provides a technical solution: an emergency cut-off device for an outdoor power distribution cabinet, comprising a controller 1, a circuit breaker 2, a knife switch 6 and a sensor assembly installed in the power distribution cabinet. The controller 1 is preferably a PLC controller of the Siemens S7-300 series. The sensor assembly and the circuit breaker 2 are both electrically connected to the controller 1, and the circuit breaker 2 is electrically connected to the knife switch 6. The sensor assembly is used to detect the environment inside the cabinet, and when an abnormality occurs, the circuit connection of the circuit breaker 2 is promptly closed by the controller 1, and the power supply of the power distribution cabinet is urgently cut off to avoid serious losses.

[0017] In one specific technical solution, the sensor assembly includes a water immersion sensor 5 respectively arranged at the lower side of the inside of the power distribution cabinet, a vibration sensor 3 arranged at the upper side of the inside of the power distribution cabinet, and a temperature sensor 4 arranged in the middle of the inside of the power distribution cabinet. The controller 1, the circuit breaker 2, the water immersion sensor 5, the vibration sensor 3, and the temperature sensor 4 are all powered by an external power supply. The water immersion sensor 5 is used to detect whether water has entered the power distribution cabinet and transmit the corresponding signal to the PLC controller. When water ingress is detected, the circuit breaker 2 is operated by the PLC controller to automatically cut off the power supply to avoid losses caused by equipment failure or short circuit. The vibration sensor 3 is used to detect whether the power distribution cabinet is hit, etc. In order to avoid equipment damage and short circuit, the vibration threshold is preset on the PLC controller. When the vibration detected by the vibration sensor 3 exceeds the set value, the PLC controller operates the circuit breaker 2 to automatically cut off the power supply. The temperature sensor 4 is used to detect the temperature value in the power distribution cabinet and transmit the corresponding signal to the PLC controller. When the PLC controller determines that the temperature in the cabinet exceeds the safety value for a certain period of time, the circuit breaker 2 is operated to automatically cut off the power supply to avoid damage to the equipment under high temperature.

[0018] The controller 1, circuit breaker 2, water immersion sensor 5, vibration sensor 3 and temperature sensor 4 used in this application are all electronic components commonly used in the prior art. Their specific structures, working principles and circuit connections are all well-known technologies and will not be described in detail here.

[0019] The preferred technical solution is that an automatic cutting mechanism connected to the handle of the knife switch 6 is provided in the distribution cabinet. When water enters the cabinet, the handle of the knife switch 6 can be pushed up by the automatic cutting mechanism, thereby forcibly cutting off the line, avoiding the situation where equipment in the cabinet such as circuit breakers, controllers, etc. fail and cannot be cut off in an emergency, greatly reducing the safety risk of outdoor distribution cabinets in bad weather.

[0020] One of the specific technical solutions is that the automatic cutting mechanism includes a fixed cylinder 7 installed on the bottom plate inside the distribution cabinet and a fixed column 9 coaxially arranged with the fixed cylinder 7. A plurality of water inlets 8 are evenly provided on the lower part of the peripheral surface of the fixed cylinder 7. The water inlet 8 is arranged at the lowest point in the cabinet. When water enters the cabinet, water enters the fixed cylinder 7 through the water inlet 8. A sliding airbag 10 is slidably provided on the fixed column 9. A slide groove 14 corresponding to the fixed column 9 is provided at the center of the upper surface of the sliding airbag 10. The water in the fixed cylinder 7 lifts the sliding airbag 10. A connecting piece connected to the handle of the knife switch 6 is provided on the outer side of the slide groove 14 on the upper surface of the sliding airbag 10. The sliding airbag 10 rises upward under the buoyancy of the accumulated water in the fixed cylinder 7, and drives the handle of the knife switch 6 to move upward through the connecting piece, so that its knife pole is disconnected from the wiring terminal, and the power supply of the equipment is urgently cut off. It is suitable for rainy areas or seasons, and avoids the risk of equipment failure that cannot be automatically cut off due to water entering the distribution cabinet.

[0021] The preferred technical solution is that the connecting part includes a plurality of connecting rods 11 evenly arranged on the outside of the sliding groove 14 on the upper surface of the sliding airbag 10, a sliding sleeve 12 is fixedly arranged on the top end of the connecting rod 11, the sliding sleeve 12 is arranged on the outside of the fixed column 9, a pushing rod 13 is fixedly arranged on the upper surface of the sliding sleeve 12, and the top end of the pushing rod 13 is hinged to the handle end of the knife switch 6. The sliding airbag 10 moves upward under the action of buoyancy, driving the connecting rod 11 and the sliding sleeve 12 to move upward, thereby driving the pushing rod 13 to push the handle of the knife switch 6 to the upper side to close the knife switch 6; the knife switch 6 is configured to be pushed upward to disconnect the circuit and pulled downward to connect the circuit.

[0022] In a further preferred technical solution, the interior of the sliding airbag 10 is sealed, and the internal volume of the sliding airbag 10 is not less than 800 cm 3 , preferably 1200-2000cm 3 , ensuring that the buoyancy of the sliding airbag 10 is above 10N, thereby being able to push the handle of the knife switch 6 to move upward; the size of the sliding airbag 10 can be adjusted according to actual needs.

[0023] Optionally, the shape of the sliding airbag 10 is cylindrical or spherical, where = when the sliding airbag 10 is cylindrical, its length can be set shorter, thereby saving installation space in the cabinet; when the sliding airbag 10 is spherical, the inner diameters of it and the fixed tube 7 need to be set larger, but the spherical airbag can reduce the contact area between it and the inner wall of the fixed tube 7, thereby reducing friction and avoiding affecting its buoyancy. The shape and diameter of the sliding airbag 10 can be flexibly selected according to actual conditions.

[0024] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. An emergency cut-off device for an outdoor power distribution cabinet, characterized in that: The invention comprises a controller (1), a circuit breaker (2), a knife switch (6) and a sensor assembly installed in a power distribution cabinet, wherein the sensor assembly and the circuit breaker (2) are electrically connected to the controller (1), the circuit breaker (2) is electrically connected to the knife switch (6), and an automatic disconnection mechanism connected to a handle of the knife switch (6) is also provided in the power distribution cabinet.

2. An emergency cut-off device for an outdoor power distribution cabinet according to claim 1, characterized in that: The sensor assembly comprises a water immersion sensor (5) arranged at the lower side of the interior of the power distribution cabinet, a vibration sensor (3) arranged at the upper side of the interior of the power distribution cabinet, and a temperature sensor (4) arranged in the middle of the interior of the power distribution cabinet.

3. An emergency cut-off device for an outdoor power distribution cabinet according to claim 1, characterized in that: The automatic cut-off mechanism comprises a fixed cylinder (7) mounted on the bottom plate inside the power distribution cabinet and a fixed column (9) coaxially arranged with the fixed cylinder (7); a plurality of water inlets (8) are evenly arranged on the lower part of the peripheral side surface of the fixed cylinder (7); a sliding airbag (10) is slidably arranged on the fixed column (9); a sliding groove (14) corresponding to the fixed column (9) is arranged at the center of the upper surface of the sliding airbag (10); and a connecting piece connected to the handle of the knife switch (6) is arranged outside the sliding groove (14) on the upper surface of the sliding airbag (10).

4. An emergency cut-off device for an outdoor power distribution cabinet according to claim 3, characterized in that: The connecting member comprises a plurality of connecting rods (11) uniformly arranged outside a slide groove (14) on the upper surface of a sliding airbag (10); a sliding sleeve (12) is fixedly arranged at the top end of the connecting rod (11); the sliding sleeve (12) is arranged outside a fixed column (9); a push rod (13) is fixedly arranged on the upper surface of the sliding sleeve (12); and the top end of the push rod (13) is hingedly arranged with the handle end of the knife switch (6).

5. An emergency cut-off device for an outdoor power distribution cabinet according to claim 3 or 4, characterized in that: The interior of the sliding airbag (10) is sealed, and the internal volume of the sliding airbag (10) is not less than 800 cm 3 .

6. An emergency cut-off device for an outdoor power distribution cabinet according to claim 5, characterized in that: The sliding airbag (10) is cylindrical or spherical in shape.

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