Arc light on-line monitoring device for power distribution switch cabinet

Abstract

The utility model discloses an arc light on-line monitoring device for a power distribution switch cabinet, which comprises a cabinet body, heat dissipation holes are uniformly formed in the middle of the bottom of one side of the cabinet body, and a sealing assembly is arranged at the bottom of one side, close to the heat dissipation holes, in the cabinet body. Through the structural design of a first baffle, a second connecting rod, a first push block, a second push block, a third spring, a second baffle and a guide groove, the second baffle can be pushed to move in the guide groove through the matched design of the second connecting rod, the first push block and the second push block when the first baffle moves downwards, and then through holes formed in the second baffle are staggered from heat dissipation holes; through the design cooperation of the components, the sealing function of the interior of the cabinet body can be achieved, dry powder is effectively prevented from leaking out through the heat dissipation holes when falling off in the later period, flames can be prevented from leaking out, circulation of air in the cabinet body is isolated, and the fire extinguishing function in the cabinet body is achieved again. And the safety performance of the device in later use can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to an online arc flash monitoring device for power distribution switchgear. Background Technology

[0002] Distribution switch cabinets are a general term for motor control centers, mainly used for circuit closure. They often contain multiple switch blades. During the closing process of the switch blades, electric arcs can easily be generated between the switch blades and the closing seat. Electric arcs pose a serious threat to equipment and personal safety. Therefore, it is necessary to design an online arc monitoring device for distribution switch cabinets.

[0003] A smart grid arc flash monitoring and protection device, described in patent application number 202121936982.7, includes a distribution cabinet and a door hinged to an open side. A main control box is installed inside the distribution cabinet. An arc flash sensor, electrically connected to the main control box, is installed on the inner wall of the distribution cabinet. A gas compression tank, also electrically connected to the main control box, is housed at the bottom of the distribution cabinet. A sealing strip is connected to the opening of the distribution cabinet. A pressure frame, which presses against the sealing strip, is also installed inside the distribution cabinet and is driven to move by a driving device. During monitoring, if an arc is generated, the symmetrically arranged arc flash sensors can effectively detect the arc and send a signal to the main control box, preventing omissions or failures to detect it. The main control box then disconnects the control circuit, controls a linear motor to start driving the pressure frame to press the sealing strip against the cabinet door, and simultaneously controls the gas compression tank to release inert gas, forcing air out of the distribution cabinet to prevent fire and promptly issue an alarm signal for emergency response.

[0004] However, the applicant believes that the device has the following problems when in use: it cannot perform the fire extinguishing function when a fire occurs, which means that the device cannot perform timely and effective fire extinguishing operations when a fire occurs later. In severe cases, it may also cause the distribution cabinet to be burned or burn the surrounding equipment, affecting the safety performance of the distribution cabinet in the later use. Utility Model Content

[0005] The purpose of this utility model is to provide an online arc flash monitoring device for power distribution switchgear, which solves the problem that most existing power distribution cabinets do not have fire extinguishing functions, which means that when a fire occurs in the power distribution cabinet, not only will the power distribution cabinet be burned, but the surrounding facilities will also be burned, reducing the safety performance of the power distribution cabinet in the later use.

[0006] To achieve the above objectives, an online arc flash monitoring device for a power distribution switchgear is provided, comprising a cabinet. Heat dissipation holes are evenly distributed at the center of the bottom of one side of the cabinet. A sealing component is provided at the bottom of the cabinet near the heat dissipation holes. A storage compartment communicating with the interior of the cabinet is provided at the top of the cabinet. An installation sleeve is installed at the center of the top of the storage compartment. A connecting rod extending into the cabinet is provided at the bottom of the inner side of each installation sleeve. A spring connected to the connecting rod is provided at the top of the inner side of the installation sleeve. A baffle that fits against the top of the cabinet interior is provided at the bottom of the baffle. A limiting component is provided at the bottom of the baffle.

[0007] According to the aforementioned arc flash online monitoring device for power distribution switchgear, the sealing assembly includes a second connecting rod, a first push block, a second push block, a third spring, a guide groove, and a second baffle. Two sets of guide grooves are provided, installed inside the cabinet near the heat dissipation holes, with the two sets positioned directly above and below the heat dissipation holes respectively. A second baffle is slidably installed inside both sets of guide grooves, and the second baffle is in contact with the heat dissipation holes. The top and bottom of one end of the front of the second baffle are provided with a third spring connected to the guide groove. The second baffle is located at the middle of one end of the back of the second baffle. The second connecting rod is installed on one end of the back of the first baffle, and the bottom of the second connecting rod is provided with a first push block that is in contact with the second push block.

[0008] According to the aforementioned arc flash online monitoring device for a power distribution switchgear, the limiting component includes a stop block, an electromagnet, an iron block, a compression sleeve, and a second spring. The electromagnet is installed at the middle position of the bottom of a baffle. Two sets of compression sleeves are provided, and the two sets of compression sleeves are installed at the middle position of the top of both sides inside the cabinet. A stop block is fitted on the side of the two sets of compression sleeves that are close to each other. A second spring connected to the stop block is provided on the side of the two sets of compression sleeves that are far apart from each other. An iron block that cooperates with the electromagnet is provided on the side of the two sets of stop blocks that are close to each other.

[0009] According to the aforementioned arc flash online monitoring device for power distribution switchgear, the baffle two has uniformly opened through holes inside, and the through holes cooperate with the heat dissipation holes.

[0010] According to the aforementioned online arc monitoring device for power distribution switchgear, the bottom of one front end of push block one and the top of one back end of push block two are provided with guide slopes, and the two sets of guide slopes cooperate with each other.

[0011] According to the aforementioned online arc monitoring device for power distribution switchgear, an opening is provided on one side of the top of the storage compartment, and a sealing cover is provided on the inner top of the opening.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: when a fire occurs, the electromagnet can be immediately de-energized, and then the attraction to the iron block can be released. The elastic restoring force of the second spring can drive the stop block to return to its original position and release the obstruction of the first baffle. Then, the elastic restoring force of the first spring can drive the connecting rod and the baffle to move down. The downward movement of the first baffle releases the seal on the inside of the storage compartment. Then, the dry powder inside the storage compartment can fall directly into the inside of the cabinet to achieve the fire extinguishing function inside the cabinet, so as to achieve complete fire extinguishing operation, improve the safety performance of the device in the later use, effectively reduce the spread of fire in the later stage, and reduce the burning phenomenon.

[0013] Finally, through the structural design of baffle one, connecting rod two, push block one, push block two, spring three, baffle two, and guide groove, when the baffle moves down, the connecting rod two, push block one, and push block two work together to push baffle two to move inside the guide groove. This causes the through hole inside baffle two to be misaligned with the heat dissipation hole, thus completing the sealing work of the heat dissipation hole later. Through the design and cooperation of the above components, the sealing function of the cabinet body can be achieved, effectively preventing the dry powder from leaking out through the heat dissipation hole when it falls later. It can also prevent the flame from leaking out and isolate the air circulation inside the cabinet, thereby realizing the fire extinguishing function inside the cabinet and further improving the safety performance of the device in later use.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a three-dimensional structural diagram of the baffle plate of the arc flash online monitoring device for power distribution switchgear according to this utility model;

[0017] Figure 2 This is a three-dimensional sectional view of the sleeve of the arc flash online monitoring device for a power distribution switchgear according to this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the baffle two of the arc flash online monitoring device for power distribution switchgear according to this utility model;

[0019] Figure 4 This is a front sectional view of an online arc flash monitoring device for a power distribution switchgear according to this utility model;

[0020] Figure 5 This is a side sectional view of an online arc flash monitoring device for a power distribution switchgear according to the present invention.

[0021] Figure 6This is a front sectional view of the sleeve of the arc flash online monitoring device for a power distribution switchgear according to this utility model.

[0022] In the diagram: 1. Cabinet; 2. Connecting rod one; 3. Mounting sleeve; 4. Spring one; 5. Storage compartment; 6. Baffle one; 7. Connecting rod two; 8. Guide groove; 9. Heat dissipation hole; 10. Baffle two; 11. Stop block; 12. Electromagnet; 13. Iron block; 14. Compression sleeve; 15. Spring two; 16. Push block one; 17. Push block two; 18. Spring three. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 This utility model provides a technical solution: an online arc monitoring device for a power distribution switchgear, including a cabinet 1. Heat dissipation holes 9 are evenly distributed at the center of the bottom of one side of the cabinet 1. A sealing component is provided at the bottom of the cabinet 1 near the heat dissipation holes 9. A storage compartment 5, connected to the interior of the cabinet 1, is located at the top center of the storage compartment 5. An installation sleeve 3 is installed at the center of the top of the storage compartment 5. A connecting rod 2 extending into the cabinet 1 is provided at the bottom of the inner side of each installation sleeve 3. A spring 4 connected to the connecting rod 2 is provided at the top of the inner side of the installation sleeve 3. A baffle 6, which fits against the top of the cabinet 1, is provided at the bottom of the connecting rod 2. A limiting component is provided at the bottom of the baffle 6. However, this device cannot perform fire extinguishing functions during a fire, resulting in ineffective fire extinguishing operations in the event of a fire. In severe cases, it may even cause damage to the power distribution cabinet or burn surrounding equipment, affecting the safety performance of the power distribution cabinet in later use.

[0025] The sealing assembly includes a connecting rod 2 7, a push block 1 16, a push block 2 17, a spring 3 18, a guide groove 8, and a baffle 2 10. Two sets of guide grooves 8 are installed inside the cabinet 1 near the heat dissipation hole 9, with the two sets positioned directly above and below the heat dissipation hole 9 respectively. The baffle 2 10 is slidably installed inside both sets of guide grooves 8, and it fits against the heat dissipation hole 9. Springs 3 18 connected to the guide groove 8 are located at the top and bottom of one end of the front side of the baffle 2 10. The baffle 2 10 is located at the middle position of one end of the back side of the baffle 2 10. The connecting rod 2 7 is installed at one end of the back side of the baffle 1 6. A push block 1 16 that fits against the push block 2 17 is located at the bottom of the connecting rod 2 7. The design of the sealing assembly allows for the sealing of the heat dissipation hole 9 in the event of a fire, preventing airflow or dry powder leakage.

[0026] The limiting component includes a stop 11, an electromagnet 12, an iron block 13, a compression sleeve 14, and a second spring 15. The electromagnet 12 is installed at the middle position of the bottom of the first baffle 6. There are two sets of compression sleeves 14, which are installed at the middle position of the top of both sides inside the cabinet 1. The side of the two sets of compression sleeves 14 that are close to each other is fitted with a stop 11. The side of the two sets of compression sleeves 14 that are far apart is fitted with a second spring 15 connected to the stop 11. The side of the two sets of stop 11 that are close to each other is fitted with an iron block 13 that cooperates with the electromagnet 12. The limiting component can block the first baffle 6 and seal the bottom of the storage compartment 5 when there is no fire. In the event of a fire, the limiting component can release the blockage of the first baffle 6 and then realize the automatic opening function.

[0027] The interior of the second baffle 10 is evenly provided with through holes, which are matched with the heat dissipation holes 9. When the second baffle 10 is not moved, the through holes are aligned with the heat dissipation holes 9 to achieve the ventilation and heat dissipation function of the cabinet 1. The bottom of the front end of the push block 16 and the top of the back end of the push block 27 are both provided with guide slopes, and the two sets of guide slopes are matched. The design of the guide slopes makes it easy to push the push block 27 when the push block 16 is moved later, and then drive the second baffle 10 to move. This makes it easy for the second baffle 10 to move the through holes to be misaligned with the heat dissipation holes 9, thus achieving the sealing function of the cabinet 1. The top of the storage compartment 5 is provided with an opening, and the top of the opening is covered with a sealing cover. The opening facilitates the later addition of dry powder.

[0028] Working principle: Through the structural design of the electromagnet 12, when energized, the electromagnet 12 can generate a strong magnetism to attract the iron block 13, so that the iron block 13 drives the stop 11 to disengage into the inside of the compression sleeve 14 to stretch the spring 15. The removal of the stop 11 can block the baffle 6 to complete the sealing of the inside of the storage compartment 5. At the same time, the sealing state of the baffle 6 can allow the connecting rod 2 to compress the spring 4 inside the mounting sleeve 3.

[0029] When a fire occurs inside cabinet 1, causing a power outage, electromagnet 12 can be immediately demagnetized to release the attraction of iron block 13. Then, the elastic restoring force of spring 15 can move block 11 and iron block 13 back to the inside of compression sleeve 14, releasing the obstruction of baffle 6. Then, the elastic restoring force of spring 4 can move connecting rod 2 down inside mounting sleeve 3, pushing baffle 6 down to release the seal on the bottom of storage compartment 5. Then, the dry powder stored in storage compartment 5 can fall directly into the inside of cabinet 1 to complete the fire extinguishing function and increase the safety performance of the device in later use.

[0030] Simultaneously, the movement of baffle 16 can also drive push block 16 to move downward via connecting rod 27. Through the guide slope design of the bottom and top of push block 16 and push block 27 on the side close to each other, when push block 16 moves downward, it can push push block 27 through the guide slope to drive baffle 20 to move inside the guide groove 8, thereby stretching spring 318. Furthermore, the movement of baffle 210 can cause the through hole opened inside it to be misaligned with the heat dissipation hole 9, and then baffle 210 completes the sealing of heat dissipation hole 9. By sealing heat dissipation hole 9, the entry of outside air into the cabinet 1 can be prevented, and the leakage of dry powder can also be prevented. At the same time, by isolating the air inside the cabinet 1, the spread of fire can be reduced, thereby further realizing the fire extinguishing function of the device and further ensuring the safety performance of the device.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A power distribution switchgear arc light on-line monitoring device, comprising a cabinet body (1), characterized in that, The cabinet (1) has heat dissipation holes (9) evenly distributed at the middle position of the bottom of one side. The cabinet (1) has a sealing component at the bottom of the side near the heat dissipation holes (9). The top of the cabinet (1) has a storage compartment (5) connected to its interior. The storage compartment (5) has an installation sleeve (3) installed at the middle position of the top of its interior. The bottom of the installation sleeve (3) has a connecting rod (2) extending into the cabinet (1). The top of the installation sleeve (3) has a spring (4) connected to the connecting rod (2). The bottom of the connecting rod (2) has a baffle (6) that fits against the top of the cabinet (1). The bottom of the baffle (6) has a limiting component.

2. The arc light on-line monitoring device for power distribution switchgear according to claim 1, characterized in that: The sealing assembly includes a connecting rod 2 (7), a push block 1 (16), a push block 2 (17), a spring 3 (18), a guide groove (8), and a baffle 2 (10). The guide groove (8) is provided in two sets. The two sets of guide grooves (8) are installed inside the cabinet (1) on the side close to the heat dissipation hole (9). The two sets of guide grooves (8) are respectively installed directly above and directly below the heat dissipation hole (9). The baffle 2 (10) is slidably provided inside the two sets of guide grooves (8). The baffle 2 (10) is in contact with the heat dissipation hole (9). The top and bottom of the front end of the baffle 2 (10) are provided with spring 3 (18) connected to the guide groove (8). The baffle 2 (10) is provided at the middle position of the back end of the baffle 2 (10). The connecting rod 2 (7) is installed at the back end of the baffle 1 (6). The bottom of the connecting rod 2 (7) is provided with push block 1 (16) in contact with push block 2 (17).

3. The arc light on-line monitoring device for power distribution switchgear according to claim 1, characterized in that: The limiting component includes a stop (11), an electromagnet (12), an iron block (13), a compression sleeve (14), and a second spring (15). The electromagnet (12) is installed at the middle position of the bottom of the first baffle (6). There are two sets of compression sleeves (14). The two sets of compression sleeves (14) are installed at the middle position of the top of both sides inside the cabinet (1). The side of the two sets of compression sleeves (14) that are close to each other is fitted with a stop (11). The side of the two sets of compression sleeves (14) that are far apart is fitted with a second spring (15) connected to the stop (11). The side of the two sets of stop (11) that are close to each other is fitted with an iron block (13) that cooperates with the electromagnet (12).

4. The arc light on-line monitoring device for power distribution switchgear according to claim 2, characterized in that: The baffle (10) has through holes evenly distributed inside, and the through holes are matched with the heat dissipation holes (9).

5. The arc light on-line monitoring device for power distribution switchgear according to claim 2, characterized in that: The bottom of the front end of push block one (16) and the top of the back end of push block two (17) are both provided with guide slopes, and the two sets of guide slopes cooperate with each other.

6. The arc light on-line monitoring device for power distribution switchgear according to claim 1, characterized in that: The storage compartment (5) has an opening on one side of its top, and the top of the opening is covered with a sealing cap.

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