Rapidly-assembled low-voltage switch cabinet

Abstract

The utility model relates to the field of switch cabinets, and discloses a rapidly-assembled low-voltage switch cabinet which comprises an electric power cabinet body, a carbon dioxide fire extinguisher is arranged in the electric power cabinet body and close to the bottom, an injection pipeline is fixedly installed at the front end of the carbon dioxide fire extinguisher, and an electric control valve is arranged on the outer surface of the injection pipeline. The smoke sensor detects the interior of the power cabinet body, when the smoke concentration in the power cabinet body exceeds a set threshold value, the sensor triggers a fire alarm signal and feeds back a voltage signal to the controller, and the controller controls the electric control valve to be opened. Liquid with certain pressure in the carbon dioxide fire extinguisher is quickly evaporated into gas when being sprayed out through a spraying pipeline, the gas enters a connecting pipe and a U-shaped gas supply pipe and is sprayed out through a plurality of spraying heads which are obliquely mounted, and fire extinguishing operation can be conveniently carried out on components and cables which are mounted in multiple layers in the power cabinet body; and the influence on the external environment caused by further expansion of the fire is avoided as much as possible.

Description

Technical Field

[0001] This application belongs to the field of switchgear technology, specifically a quick-assembly low-voltage switchgear. Background Technology

[0002] Low-voltage switchgear is a type of equipment used for the protection and distribution of outdoor power equipment. It has fire-resistant properties and can prevent the occurrence and spread of fire to the external environment to a certain extent. Fire-resistant outdoor power cabinets can delay the spread of fire and reduce the impact of fire on the external environment to a certain extent by adopting fire-resistant materials, fire-resistant isolation, fire-resistant sealing and other design measures. Their main goal is to protect the internal circuits and components of the power equipment to prevent damage and functional failure of the power equipment caused by fire.

[0003] For example, utility model patent CN219394072U discloses an electrical fireproof cabinet, including a cabinet body. The top of the cabinet body is equipped with a detachable storage box, and the storage box is equipped with multiple storage slots. Each storage slot has multiple equally spaced discharge pipes at its bottom along its length. Each discharge pipe is equipped with a solenoid valve. The inner wall of the cabinet body is equipped with a controller, a smoke sensor, and a temperature sensor. The bottom of the cabinet body is equipped with a base, and the front of the cabinet body is equipped with a cabinet door. This utility model, through the cooperation of the smoke sensor, temperature sensor, controller, and solenoid valve, will quickly open the solenoid valve when a flame is detected inside the cabinet. At this time, all the discharge pipes will spray sand. Since the discharge pipes are distributed in a matrix, the sprayed sand will completely cover all corners inside the cabinet body, so that the sand completely covers the flames, which is conducive to quickly extinguishing the flames and greatly improving the fire extinguishing effect.

[0004] However, in actual use, it was found that most of the components installed inside the power cabinet are installed vertically layer by layer. When the sprayed sand falls from top to bottom, it can only extinguish the flames near the top and bottom of the cabinet, and cannot effectively extinguish the flames caused by short circuits in the cables of the components in the middle of the cabinet. Therefore, a quick-assembly low-voltage switch cabinet is provided. Utility Model Content

[0005] The purpose of this application is to provide a quick-assembly low-voltage switchgear in order to solve the problems mentioned above.

[0006] The technical solution adopted in this application is as follows: A quick-assembly low-voltage switchgear includes a power cabinet body. A carbon dioxide fire extinguisher is installed inside the power cabinet body near the bottom. A spray pipe is fixedly installed at the front end of the carbon dioxide fire extinguisher. An electrically controlled valve is installed on the outer surface of the spray pipe. A U-shaped gas supply pipe is fixedly installed inside the power cabinet body near the inner side wall of the front end. Multiple nozzles are arrayed on the outer surface of the U-shaped gas supply pipe. A connecting pipe is fixedly installed on the outer surface of the U-shaped gas supply pipe. The end of the spray pipe away from the carbon dioxide fire extinguisher is fixed to the inner wall of the connecting pipe.

[0007] In a preferred embodiment, a ventilation hole is provided on the side of the power cabinet body, and a rectangular fixing frame is fixedly installed inside the power cabinet body on the side of the ventilation hole, and a drying mesh plate is provided on the front side of the rectangular fixing frame.

[0008] In a preferred embodiment, two fixing rings are fixedly installed on the outer surface of the carbon dioxide fire extinguisher, and a support rod is fixedly installed on the outer surface of each of the two fixing rings. The end of the support rod away from the fixing ring is fixed to the inner side wall of the power cabinet body.

[0009] In a preferred embodiment, a smoke sensor is fixedly installed on the top surface of the power cabinet body, the detection end of the smoke sensor extends into the interior of the power cabinet body, and the smoke sensor is electrically connected to the electrically controlled valve through a controller.

[0010] In a preferred embodiment, a sealed cabinet door is hinged to the front side of the power cabinet body via a hinge.

[0011] In a preferred embodiment, a support base is fixedly installed on the bottom surface of the power cabinet body.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0013] 1. In this application, due to the adoption of the above-mentioned scheme, the smoke sensor detects the inside of the power cabinet. When the smoke concentration inside the power cabinet exceeds the set threshold, the sensor will trigger a fire alarm signal and feed back a voltage signal to the controller. The controller controls the electric control valve to open, so that the liquid with a certain pressure inside the carbon dioxide fire extinguisher will quickly evaporate into gas form when it is sprayed out through the spray pipe and enter the interior of the connecting pipe and the U-shaped gas supply pipe and be sprayed out through multiple inclined nozzles. This facilitates the fire extinguishing operation on the multi-layered components and cables inside the power cabinet and minimizes the impact of the fire on the external environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the U-shaped air supply pipe without installation as per this application;

[0016] Figure 3 This is a schematic diagram of the rectangular fixed frame structure of this application;

[0017] Figure 4 For the purposes of this application Figure 3 Enlarged structural diagram at point A in the middle.

[0018] The markings in the diagram are: 1. Power cabinet body; 2. Carbon dioxide fire extinguisher; 3. Spray pipe; 4. U-shaped gas supply pipe; 5. Nozzle; 6. Connecting pipe; 7. Ventilation hole; 8. Rectangular fixing frame; 9. Drying mesh plate; 10. Fixing ring; 11. Support rod; 12. Smoke sensor; 13. Sealed cabinet door; 14. Support base. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] refer to Figure 1 , Figure 2 and Figure 3 A quick-assembly low-voltage switchgear includes a power cabinet body 1. A sealed cabinet door 13 is hinged to the front of the power cabinet body 1. A support base 14 is fixedly installed on the bottom surface of the power cabinet body 1. The power cabinet body 1 is made of flame-retardant and high-temperature resistant materials to improve its fire resistance. The sealed cabinet door 13 facilitates the sealing of the power cabinet body 1, preventing rainwater and dust from easily entering the interior of the power cabinet body 1. The support base 14 facilitates the support of the power cabinet body 1, keeping it away from the ground.

[0021] refer to Figure 1 A carbon dioxide fire extinguisher 2 is installed inside the power cabinet body 1 near the bottom. Two fixing rings 10 are fixedly installed on the outer surface of the carbon dioxide fire extinguisher 2, and a support rod 11 is fixedly installed on the outer surface of each of the two fixing rings 10. The end of the support rod 11 away from the fixing ring 10 is fixed to the inner side wall of the power cabinet body 1. The fixing rings 10 and the support rod 11 make it easy to install the carbon dioxide fire extinguisher 2 inside the power cabinet body 1 near the bottom.

[0022] refer to Figure 1 , Figure 2The front end of the carbon dioxide fire extinguisher 2 is fixedly installed with a spray pipe 3. An electrically controlled valve is installed on the outer surface of the spray pipe 3. A U-shaped gas supply pipe 4 is fixedly installed inside the power cabinet body 1 near the inner wall of the front end. Multiple nozzles 5 are arrayed on the outer surface of the U-shaped gas supply pipe 4. A connecting pipe 6 is fixedly installed on the outer surface of the U-shaped gas supply pipe 4. The end of the spray pipe 3 away from the carbon dioxide fire extinguisher 2 is fixed to the inner wall of the connecting pipe 6. The compressed carbon dioxide inside the carbon dioxide fire extinguisher 2 is stored in liquid form. When it is sprayed out through the spray pipe 3, it quickly evaporates into gaseous form. The multiple nozzles 5 are installed at a 60° angle. Through the U-shaped gas supply pipe 4 and the connecting pipe 6, it is easy to deliver gaseous carbon dioxide into the nozzles 5 and spray it out, thereby facilitating the fire extinguishing operation for flames generated inside the power cabinet body 1.

[0023] refer to Figure 1 , Figure 3 and Figure 4 Ventilation holes 7 are provided on the side of the power cabinet body 1. A rectangular fixing frame 8 is fixedly installed inside the power cabinet body 1 on the side of the ventilation holes 7. A drying mesh plate 9 is provided on the front side of the rectangular fixing frame 8. The drying mesh plate 9 is filled with desiccant to dry the relatively humid air entering the power cabinet body 1 in rainy or snowy weather. The rectangular fixing frame 8 is fixed by magnetic plate adsorption to iron plate, so as to avoid the humid gas from affecting the components installed inside the power cabinet body 1.

[0024] refer to Figure 1 A smoke sensor 12 is fixedly installed on the top surface of the power cabinet body 1. The detection end of the smoke sensor 12 extends into the interior of the power cabinet body 1. The smoke sensor 12 and the electrically controlled valve are electrically connected through a controller. The controller can be a PLC controller or a microcontroller, etc. The controller, smoke sensor 12 and electrically controlled valve are existing structures. This application only uses them and does not improve their structure. They will not be described in detail here. When the smoke sensor 12 detects smoke inside the power cabinet body 1, it feeds back a voltage signal to the controller. The controller feeds back a voltage signal to the electrically controlled valve, causing the electrically controlled valve to open. This makes it easier for the carbon dioxide fire extinguisher 2 to spray gas to extinguish the flames inside the power cabinet body 1.

[0025] The implementation principle of this application for a rapid assembly low-voltage switchgear embodiment is as follows: When a flame occurs inside the power cabinet body 1, the smoke generated by the combustion is captured and analyzed by the smoke sensor 12. When the smoke concentration exceeds the set threshold, the sensor will trigger a fire alarm signal and feed back a voltage signal to the controller. The controller controls the electric control valve to open, so that the liquid with a certain pressure inside the carbon dioxide fire extinguisher 2 will quickly evaporate into a gaseous form when sprayed through the spray pipe 3 and enter the interior of the connecting pipe 6 and the U-shaped gas supply pipe 4 and be sprayed out through multiple inclined nozzles 5. This facilitates the fire extinguishing operation of the multi-layered components and cables inside the power cabinet body 1, and minimizes the impact of the fire on the external environment.

[0026] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A quick-assembly low-voltage switchgear, comprising a power cabinet body (1), characterized in that: A carbon dioxide fire extinguisher (2) is installed near the bottom inside the power cabinet body (1). A spray pipe (3) is fixedly installed at the front end of the carbon dioxide fire extinguisher (2). An electrically controlled valve is installed on the outer surface of the spray pipe (3). A U-shaped air supply pipe (4) is fixedly installed on the inner side wall near the front end inside the power cabinet body (1). Multiple nozzles (5) are arrayed on the outer surface of the U-shaped air supply pipe (4). A connecting pipe (6) is fixedly installed on the outer surface of the U-shaped air supply pipe (4). The end of the spray pipe (3) away from the carbon dioxide fire extinguisher (2) is fixed to the inner wall of the connecting pipe (6).

2. The rapid assembly low-voltage switchgear as described in claim 1, characterized in that: The power cabinet body (1) has ventilation holes (7) on its side. A rectangular fixing frame (8) is fixedly installed inside the power cabinet body (1) on the side of the ventilation holes (7). A drying mesh plate (9) is provided on the front side of the rectangular fixing frame (8).

3. The rapid assembly low-voltage switchgear as described in claim 1, characterized in that: Two fixing rings (10) are fixedly installed on the outer surface of the carbon dioxide fire extinguisher (2), and a support rod (11) is fixedly installed on the outer surface of both fixing rings (10). The end of the support rod (11) away from the fixing ring (10) is fixed to the inner wall of the power cabinet body (1).

4. The rapid assembly low-voltage switchgear as described in claim 1, characterized in that: A smoke sensor (12) is fixedly installed on the top surface of the power cabinet body (1). The detection end of the smoke sensor (12) extends into the interior of the power cabinet body (1). The smoke sensor (12) is electrically connected to the electric control valve through a controller.

5. A rapid assembly low-voltage switchgear as described in claim 1, characterized in that: The front side of the power cabinet body (1) is hinged with a sealed cabinet door (13).

6. A rapid assembly low-voltage switchgear as described in claim 1, characterized in that: A support base (14) is fixedly installed on the bottom surface of the power cabinet body (1).

Images