Electrical control cabinet with moisture-proof structure

Abstract

An electrical control cabinet with a moisture-proof structure belongs to the technical field of electrical control cabinet equipment and is used for preventing air in the electrical control cabinet from being moist. According to the technical scheme, a ventilation hole is formed in the top face of a cabinet body, a fan is installed in the middle of the ventilation hole, a conical gas collecting hood is installed above the ventilation hole, a plurality of heating wires are installed in the gas collecting hood, one end of a gas conveying pipe is connected to the upper end of the gas collecting hood, the other end of the gas conveying pipe is bent downwards to enter the cabinet body, and a heating coil from top to bottom is installed on the inner wall of one side of the cabinet body. The lower end of the air conveying pipe is connected with the upper end of the heating coil, the lower end of the heating coil is connected with the exhaust pipe, the exhaust pipe is horizontally fixed to the bottom face of the cabinet body, a plurality of nozzles are evenly distributed on the upper surface of the exhaust pipe, spraying holes of the nozzles face upwards, and a humidity sensor is arranged on the inner wall of the top face of the cabinet body. The electric control cabinet is simple in structure and convenient to use, can keep the interior of the electric control cabinet dry, avoids short-circuit spontaneous combustion caused by too wet interior, and eliminates potential safety hazards.

Description

Technical Field

[0001] The utility model relates to an electric control cabinet with a moisture-proof structure, belonging to the technical field of electric control cabinet equipment. Background Art

[0002] The electrical control cabinet is a commonly used electrical equipment in the port power system. It is often used in the power generation, distribution, substations and large port equipment of various ports. In the electrical control cabinet, the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment need to be assembled in a closed or semi-closed metal cabinet or on a screen according to the electrical wiring requirements. Its layout should meet the requirements of the normal operation of the power system, be easy to repair, and not endanger the safety of people and surrounding equipment. The electrical control cabinet can connect or disconnect the circuit with the help of manual or automatic switches during normal operation. In the event of a fault or abnormal operation, it is necessary to use protective electrical appliances to cut off the circuit or alarm. When the electrical control cabinet is in operation, the measuring instruments can display various parameters in operation, and some electrical parameters can be adjusted to prompt or send signals for deviations from normal working conditions.

[0003] The existing general electrical control cabinet includes a cabinet body, which defines a receiving cavity for receiving the controller, a mounting cavity connected to the receiving cavity, an air inlet channel connected to the mounting cavity, and an air outlet channel connected to the receiving cavity. The airflow enters the mounting cavity from the air inlet channel, flows through the receiving cavity, and then flows out through the air outlet channel. A static electricity removal fan and a dustproof screen are also installed in the mounting cavity to filter the airflow entering the receiving cavity from the mounting cavity.

[0004] At present, the main problem with existing general electrical control cabinets is that it is difficult to dehumidify the inside of the control cabinet. When it is cloudy or rainy for a long time, the inside of the control cabinet is prone to moisture. Due to the overly humid environment, water droplets will accumulate inside the control cabinet, causing the equipment in the control cabinet to short-circuit and spontaneously combust, seriously affecting the safe use of the control cabinet. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an electrical control cabinet with a moisture-proof structure. The electrical control cabinet can detect the internal humidity of the electrical control cabinet through a humidity sensor, and is equipped with a dehumidification and drying device, which can keep the electrical control cabinet dry, avoid short circuit and spontaneous combustion of equipment in the control cabinet due to excessive humidity inside, and eliminate safety hazards.

[0006] The technical solution to solve the above technical problems is:

[0007] An electrical control cabinet with a moisture-proof structure comprises a cabinet body, an air collecting hood, a fan, a heating wire, an air pipe, a heating coil, an exhaust pipe, a humidity sensor, and a controller. The cabinet body is an upright rectangular parallelepiped, and an air vent is provided on the top surface of the cabinet body. A conical air collecting hood is installed above the air vent, and the bottom edge of the air collecting hood is sealed and connected to the top surface of the cabinet body. A fan is installed in the middle of the air vent on the top surface of the cabinet body, and a plurality of heating wires are installed in the air collecting hood above the fan. A horizontal air pipe is provided on the top surface of the cabinet body, and one end of the air pipe is connected to the air collecting hood. At the upper end of the hood, the other end of the air pipe is bent downward and enters the cabinet. A heating coil is installed from top to bottom on the inner wall of one side of the cabinet. The lower end of the air pipe is connected to the upper end of the heating coil, and the lower end of the heating coil is connected to the exhaust pipe. The exhaust pipe is horizontally fixed on the bottom surface of the cabinet. A plurality of nozzles are evenly distributed on the upper surface of the exhaust pipe, and the spray holes of the nozzles are facing upward. A humidity sensor is arranged on the inner wall of the top surface of the cabinet. The humidity sensor, fan, and heating wire are respectively connected to the controller by signal wires and power transmission wires.

[0008] The above-mentioned electrical control cabinet with a moisture-proof structure, the heating coil is composed of multiple sections of horizontal tubes and straight tubes, the multiple sections of horizontal tubes are arranged in parallel from top to bottom, the two ends of each section of the horizontal tube are connected to one end of the adjacent horizontal tube above and below through a straight tube, and the multiple sections of the horizontal tubes and the straight tubes are connected to form a curved pipeline that is connected up and down.

[0009] In the above-mentioned electrical control cabinet with moisture-proof structure, the exhaust pipe is two parallel pipes, the two ends of the exhaust pipe are respectively opposite to the two opposite side inner walls of the cabinet body, and the two ends of the exhaust pipe are closed.

[0010] The electrical control cabinet with moisture-proof structure is provided with an LED lamp tube installed on the inner wall of the top surface of the cabinet, and the LED lamp tube is connected to the controller through a power transmission wire.

[0011] The beneficial effects of the utility model are as follows: a humidity sensor is used to detect the humidity inside the control cabinet; when the humidity sensor detects that the humidity exceeds a set range, the information is transmitted to the controller; the controller controls the fan to start and extract the humid air inside the control cabinet, heats it through a heating wire, and transports the heated air to the inside of a sealed tube through a coil, and sprays it out through a nozzle; during the transportation process, the heated air can be cooled by the coil to prevent the heated air from damaging the equipment inside the control cabinet, thereby achieving the purpose of dehumidifying the inside of the control cabinet, and effectively preventing the accumulation of water droplets inside the control cabinet due to excessive humidity, which may cause short circuit and spontaneous combustion of the equipment inside the control cabinet, so as to achieve good thermal stability of electrical components in the control cabinet, good insulation of equipment, and stable system operation.

[0012] The utility model installs an air collecting hood, a fan and a heating wire on the top of the cabinet. The fan can extract the humid air inside the cabinet, and the heating wire heats the humid air to remove the moisture therein; the air supply pipe inputs the hot air into the heating coil of the cabinet, and the heating coil can bake the humid air in the cabinet on the one hand, and cool the hot air in the heating coil 10 on the other hand, so as to prevent the overheated air from damaging the equipment inside the control cabinet; the exhaust pipe sprays the cooled dry air into the cabinet through the nozzle, so as to realize the recycling of the dry air.

[0013] The utility model has a simple structure and is easy to use. The dehumidification and drying device can keep the interior of the electrical control cabinet dry, thereby preventing short circuit and spontaneous combustion of equipment in the control cabinet due to excessive moisture inside, thereby eliminating potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 A cross-sectional view of

[0016] Figure 3 It is a schematic diagram of the structure of the gas collecting hood;

[0017] Figure 4 It is a schematic diagram of the connection between the hose and the door body.

[0018] The markings in the figure are as follows: cabinet body 1, supporting legs 2, door body 3, handle 4, air collecting hood 5, fan 6, heating wire 7, humidity sensor 8, air supply pipe 9, heating coil 10, exhaust pipe 11, nozzle 12, horizontal pipe 13, straight pipe 14, LED light tube 15, fire dry powder box 16, pneumatic diaphragm pump 17, hose 18, smoke sensor 19. DETAILED DESCRIPTION

[0019] The utility model is composed of a cabinet 1, an air collecting hood 5, a fan 6, a heating wire 7, a humidity sensor 8, an air supply pipe 9, a heating coil 10, an exhaust pipe 11, a nozzle 12, an LED lamp 15 and a fire extinguishing device.

[0020] Figure 1 , 2 As shown, the cabinet 1 is an upright rectangular parallelepiped, and four supporting legs 2 are fixedly installed at the bottom of the cabinet 1, and the four supporting legs 2 are located at the four corners of the bottom of the cabinet 1. The front side of the cabinet 1 is hinged to the door body 3, and the front side of the door body 3 is fixedly installed with a handle 4.

[0021] Figure 1 , 23 shows that there is a vent on the top of the cabinet 1, and a conical air collecting hood 5 is installed above the vent. The bottom edge of the air collecting hood 5 is sealed and connected to the top of the cabinet 1. A fan 6 is installed in the middle of the vent on the top of the cabinet 1. A plurality of heating wires 7 are installed in the air collecting hood 5 above the fan 6. A humidity sensor 8 is arranged on the inner wall of the top of the cabinet 1. The humidity sensor 8, the fan 6, and the heating wire 7 are respectively connected to the controller by a signal wire and a power transmission wire. The humidity sensor 8 is used to monitor the air humidity in the cabinet 1. The fan 6 can extract the humid air inside the cabinet 1, and the heating wire 7 heats the humid air to remove the moisture therein.

[0022] Figure 1 , 2 It is shown that there is a horizontal air pipe 9 on the top surface of the cabinet 1, one end of the air pipe 9 is connected to the upper end of the air collecting hood 5, and the other end of the air pipe 9 is bent downward to enter the cabinet 1. The air pipe 9 transports the air heated by the heating wire 7 into the cabinet 1.

[0023] Figure 1 , 2 It is shown that a heating coil 10 is installed from top to bottom on the inner wall of one side of the cabinet 1, the lower end of the gas supply pipe 9 is connected to the upper end of the heating coil 10, and the lower end of the heating coil 10 is connected to the exhaust pipe 11. The heating coil 10 is composed of multiple cross tubes 13 and straight tubes 14 to form a serpentine-like pipeline. The multiple cross tubes 13 are arranged in parallel from top to bottom, and the two ends of each cross tube 13 are respectively connected to one end of the adjacent cross tube 13 above and below through the straight tube 14. The heating coil 10 can bake the humid air in the cabinet 1 on the one hand, and cool the hot air in the heating coil 10 on the other hand to prevent the overheated air from damaging the equipment inside the control cabinet.

[0024] Figure 1 , 2 It is shown that the exhaust pipe 11 is horizontally fixed on the bottom surface of the cabinet 1. The exhaust pipe 11 is two parallel pipes. The two ends of the exhaust pipe 11 are respectively opposite to the two opposite side inner walls of the cabinet 1. The two ends of the exhaust pipe 11 are closed. A plurality of nozzles 12 are evenly distributed on the upper surface of the exhaust pipe 11, and the nozzle holes of the nozzles 12 are upward. The exhaust pipe 11 sprays the cooled dry air into the cabinet 1 through the nozzles 12, reducing the air humidity in the cabinet 1 and realizing the recycling of the dry air.

[0025] Figure 1 , 2 It is shown that an LED lamp tube 15 is installed on the inner wall of the top surface of the cabinet 1, and the LED lamp tube 15 is connected to the controller through a power transmission wire. The LED lamp tube 15 is used to illuminate the inside of the cabinet 1.

[0026] Figure 1 , 24 shows that the utility model also has a fire extinguishing device, which plays a role in extinguishing fire when the humidity sensor 8 installed in the cabinet 1 fails. In actual use, the humidity sensor 8 may fail and cannot accurately monitor the air humidity, causing water droplets to accumulate inside the cabinet 1, thereby causing the equipment in the control cabinet to short-circuit and self-ignite.

[0027] The use process of the utility model is as follows:

[0028] When the humidity sensor 8 detects that the air humidity in the cabinet 1 exceeds the set range, the humidity sensor 8 transmits a signal to the controller, and the controller starts the fan 6 and turns on the heating switch of the heating wire 7. The fan 6 draws the humid air from the cabinet 1 and heats it through the heating wire 7.

[0029] After the wet air is heated by the heating wire 7, the water vapor is removed and it becomes dry hot air. The dry hot air is input into the heating coil 10 of the cabinet 1 through the air pipe 9. The hot air in the heating coil 10 can bake the wet air in the cabinet 1 to reduce the humidity of the air. On the other hand, the hot air can also be cooled by the heating coil 10 to prevent the overheated air from damaging the equipment inside the control cabinet.

[0030] The lower end of the heating coil 10 conveys air to the interior of the exhaust pipe 11, and the exhaust pipe 11 sprays the cooled dry air into the cabinet 1 through the nozzle 12, thereby realizing the recycling of the dry air.

[0031] An embodiment of the present utility model is as follows:

[0032] The length of the cabinet 1 is 1000 mm, the width is 600 mm, and the height is 1600 mm;

[0033] The height of the gas collecting hood 5 is 360 mm, and the diameter of the lower end is 160 mm;

[0034] The model of fan 6 is QVKS\KS2208HA2-T9L;

[0035] The model of the heating wire 7 is stainless steel U-shaped fin electric heating;

[0036] The model of humidity sensor 8 is WHD48-11;

[0037] The diameter of the gas delivery pipe 9 is 60 mm and the length is 800 mm;

[0038] The diameter of the horizontal tube 13 of the heating coil 10 is 15 mm and the length is 460 mm, and the diameter of the straight tube 14 is 15 mm and the length is 80 mm;

[0039] The exhaust pipe 11 has a diameter of 18 mm and a length of 200 mm;

[0040] The diameter of the nozzle 12 is 6 mm.

Claims

1. An electrical control cabinet with a moisture-proof structure, characterized in that: It comprises a cabinet (1), an air collecting hood (5), a fan (6), a heating wire (7), an air supply pipe (9), a heating coil (10), an exhaust pipe (11), a humidity sensor (8), and a controller. The cabinet (1) is a vertical rectangular parallelepiped. The top surface of the cabinet (1) is provided with an air vent. A conical air collecting hood (5) is installed above the air vent. The bottom edge of the air collecting hood (5) is sealed and connected to the top surface of the cabinet (1). A fan (6) is installed in the middle of the air vent on the top surface of the cabinet (1). A plurality of heating wires (7) are installed in the air collecting hood (5) above the fan (6). A horizontal air supply pipe (9) is provided on the top surface of the cabinet (1). One end of the air supply pipe (9) is connected to the upper end of the air collecting hood (5). The other end of the gas supply pipe (9) is bent downward and enters the cabinet (1). A heating coil (10) is installed from top to bottom on the inner wall of one side of the cabinet (1). The lower end of the gas supply pipe (9) is connected to the upper end of the heating coil (10). The lower end of the heating coil (10) is connected to the exhaust pipe (11). The exhaust pipe (11) is horizontally fixed on the bottom surface of the cabinet (1). A plurality of nozzles (12) are evenly distributed on the upper surface of the exhaust pipe (11). The nozzle holes of the nozzles (12) are facing upward. A humidity sensor (8) is arranged on the inner wall of the top surface of the cabinet (1). The humidity sensor (8), the fan (6), and the heating wire (7) are respectively connected to the controller by a signal wire and a power transmission wire.

2. The electrical control cabinet with moisture-proof structure according to claim 1, characterized in that: The heating coil (10) is composed of a plurality of transverse tubes (13) and straight tubes (14). The plurality of transverse tubes (13) are arranged in parallel from top to bottom. The two ends of each transverse tube (13) are connected to one end of an adjacent transverse tube (13) above and below through a straight tube (14). The plurality of transverse tubes (13) and the straight tubes (14) are connected to form a curved pipe that is connected up and down.

3. The electrical control cabinet with moisture-proof structure according to claim 1, characterized in that: The exhaust pipe (11) is two parallel pipes, and the two ends of the exhaust pipe (11) are respectively opposite to two opposite side inner walls of the cabinet (1), and the two ends of the exhaust pipe (11) are closed.

4. The electrical control cabinet with moisture-proof structure according to claim 1, characterized in that: An LED lamp tube (15) is installed on the inner wall of the top surface of the cabinet (1), and the LED lamp tube (15) is connected to the controller via a power transmission wire.

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