Electrical equipment moisture-proof device

Abstract

The invention discloses a moisture-proof device for electrical equipment, and relates to the technical field of electrical equipment. A hollowed-out storage plate is arranged in the cabinet body, a first-stage air window and a second-stage air window which are located at different heights are formed in the two sides of the cabinet body respectively, and a first-stage fan is arranged on the face, close to the dehumidification structure, of the storage plate; the dehumidification structure comprises an inverted-V-shaped flow guide plate, a telescopic rod is installed in the middle of the cabinet body and connected with the flow guide plate, and the flow guide plate is installed in the cabinet body in a sliding mode. A semiconductor chilling plate is mounted on the side, away from the first-stage fan, of the guide plate; through grooves are formed in the two sides of the cabinet body, the two ends of the flow guide plate penetrate out of the through grooves, the end, located outside the cabinet body, of the flow guide plate is connected with a flow guide groove, and one end of the flow guide groove is connected with a water outlet groove attached to the surface of the cabinet body. The dehumidification efficiency can be remarkably improved, long-term automatic dehumidification is achieved, internal temperature rise cannot be caused, and use is safe and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, in particular to a moisture-proof device for electrical equipment. Background Art

[0002] Electrical equipment is a general term for generators, transformers, power lines, circuit breakers and other equipment in the power system. The important role that electricity plays in our lives and production cannot be ignored. It brings us great convenience and becomes an important energy source in our production and life. The most critical factor for the normal operation and transmission of electricity in a power plant is electrical equipment. In order to ensure the stable operation of electrical equipment and avoid safety threats to people living or working around it, the installation of electrical equipment has many regulatory requirements, such as electrical insulation, electrical safety distance, safe current carrying capacity and obvious, clear and unified markers.

[0003] Electrical equipment is generally installed in a dedicated electrical cabinet or distribution cabinet. In addition to common indoor places such as substations or distribution rooms, some distribution cabinets are also directly installed in outdoor environments. Outdoor distribution cabinets have higher performance requirements and need to be rainproof and moisture-proof. Distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets. They are the final equipment of the distribution system. Distribution cabinets are a general term for motor control centers. Distribution cabinets are used in places where the load is relatively dispersed and there are fewer circuits; motor control centers are used in places where the load is concentrated and there are more circuits.

[0004] Electrical equipment will continuously generate heat and noise during use, so distribution cabinets and substations also need to have good heat dissipation and noise reduction effects. In order to ensure good heat dissipation effects, existing distribution cabinets generally use fans in combination with air windows to dissipate heat through airflow. This type of distribution cabinet has frequent exchanges with the outside air. In a humid environment, it will also cause the humidity inside the distribution cabinet to be too high, increasing the risk of equipment corrosion and short circuits. Therefore, it is necessary to improve the moisture-proof performance of the distribution cabinet. The common moisture-proof method for distribution cabinets is to set hygroscopic materials inside the distribution cabinet. This method is inconvenient to use because it requires frequent replacement of hygroscopic materials. Some distribution cabinets also use internal heating to continuously reduce humidity, but this type of equipment will cause the temperature inside the distribution cabinet to be too high, reducing safety. Summary of the invention

[0005] The purpose of the present invention is to provide a moisture-proof device for electrical equipment to solve the problems mentioned in the above background technology. A device is provided that does not require manual maintenance and can automatically prevent moisture for a long time, while not affecting the normal use of internal equipment.

[0006] To achieve the above object, the present invention provides the following technical solutions: A moisture-proof device for electrical equipment, comprising a cabinet; a hollow storage plate is arranged inside the cabinet, and first-level air windows and second-level air windows located at different heights are respectively opened on both sides of the cabinet; a dehumidification structure is arranged inside the cabinet, and a first-level fan is arranged on the side of the storage plate close to the dehumidification structure; the dehumidification structure comprises an inverted V-shaped guide plate, a telescopic rod is installed in the middle of the cabinet, the telescopic rod is connected to the guide plate, and the guide plate is slidably installed inside the cabinet; a semiconductor refrigeration sheet is installed on the side of the guide plate away from the first-level fan; through grooves are opened on both sides of the cabinet, and both ends of the guide plate pass through the through grooves, one end of the guide plate located outside the cabinet is connected to the guide groove, and one end of the guide groove is connected to a water outlet trough, and the water outlet trough fits the surface of the cabinet.

[0007] As a further solution of the present invention: vertical support rods are respectively installed on both sides of the guide plate, the support rods are in contact with the inner wall of the cabinet, and the support rods pass through the gap between the cabinet and the storage plate.

[0008] As a further solution of the present invention: a primary baffle and a secondary baffle corresponding to the primary air louver and the secondary air louver are respectively installed on the support rod, a limiting frame is arranged on the inner wall of the cabinet, and the primary baffle passes through the limiting frame.

[0009] As a further solution of the present invention: a water inlet is formed on a side of the guide groove that is in contact with the cabinet, the guide groove is inclined toward the water outlet groove, and a water outlet pipe is connected to the water outlet groove.

[0010] As a further solution of the present invention: the height of the storage plate and the first-level fan is located between the first-level air window and the second-level air window, the height of the second-level air window is located between the first-level fan and the through-groove, and the width of the through-groove is greater than the width of the first-level air window and the second-level air window.

[0011] As a further solution of the present invention: a grid plate is provided on one side of the cabinet body close to the semiconductor refrigeration plate, a heat sink is installed in the cabinet body and located between the semiconductor refrigeration plate and the grid plate, and a secondary fan is installed on the heat sink.

[0012] As a further solution of the present invention: track grooves with an eight-shaped distribution are provided at both ends of the cabinet, wipers are connected between the track grooves, the wipers are located on the surface of the guide plate, and the slope of the track grooves is greater than the slopes on both sides of the guide plate.

[0013] As a further solution of the present invention: a cabinet door is installed on one side of the cabinet, a plurality of supporting legs are installed on the outside of the cabinet, an inverted V-shaped rainproof eaves is installed on the cabinet, and a humidity sensor is arranged inside the cabinet.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The above-mentioned moisture-proof device for electrical equipment is adopted. The cabinet in the device is used to place the electrical equipment. The electrical equipment is placed on the storage board in the cabinet. At the same time, an inverted V-shaped guide plate is arranged under the storage board, and a semiconductor refrigeration sheet is installed at the bottom of the guide plate. When dehumidification is required, the guide plate is lifted upward by using a telescopic rod to seal the primary air window and the secondary air window. At the same time, the guide plate also seals the area where the groove is penetrated, so that the equipment is located in a closed space. The semiconductor refrigeration sheet cools the guide plate to a range close to zero degrees. The primary fan continuously blows the internal air to the guide plate in a circulating manner. The water vapor condenses into water droplets on the guide plate. After the dehumidification is completed, the guide plate is moved downward, and the water droplets gradually enter the water outlet trough from the guide grooves on both sides and are finally discharged. The above-mentioned moisture-proof device for electrical equipment can significantly improve the dehumidification efficiency compared to traditional dehumidification by water-absorbing materials and heating dehumidification, and will not cause the electrical equipment to be in a high-temperature environment. On the contrary, the dehumidification process of the device can effectively reduce the temperature inside the cabinet while dehumidifying, improve the working environment of the electrical equipment, and enhance the safety of equipment use. Since the space inside the cabinet is closed during the initial process of the device, it can ensure that the dehumidification is mainly concentrated on the gas inside the cabinet, and no rapid gas exchange with the outside world occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a moisture-proof device for electrical equipment.

[0016] Figure 2 It is a structural schematic diagram of the cross section of the cabinet in the moisture-proof device of electrical equipment.

[0017] Figure 3 This is a structural diagram of the connection between the dehumidification structure and the bottom of the cabinet in the moisture-proof device of electrical equipment.

[0018] Figure 4 It is a structural schematic diagram of the cross section of the bottom of the cabinet in the moisture-proof device of electrical equipment.

[0019] Figure 5 It is a structural schematic diagram of the dehumidification structure in the moisture-proof device of electrical equipment.

[0020] In the figure: 1. cabinet body; 11. cabinet door; 12. rainproof eaves; 13. primary air louver; 14. supporting foot; 15. secondary air louver; 16. limit frame; 17. through slot; 18. grid plate; 19. track slot; 2. dehumidification structure; 21. guide plate; 22. semiconductor cooling plate; 23. guide slot; 231. water inlet; 24. water outlet; 241. water outlet pipe; 25. telescopic rod; 26. primary baffle; 27. supporting rod; 28. secondary baffle; 3. storage board; 4. primary fan; 5. heat dissipation rack; 51. secondary fan; 6. wiper; 7. humidity sensor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 5 In an embodiment of the present invention, a moisture-proof device for electrical equipment includes a cabinet 1; a hollow storage plate 3 is arranged inside the cabinet 1, and a first-level air window 13 and a second-level air window 15 located at different heights are respectively opened on both sides of the cabinet 1; a dehumidification structure 2 is arranged inside the cabinet 1, and a first-level fan 4 is arranged on a side of the storage plate 3 close to the dehumidification structure 2; the dehumidification structure 2 includes an inverted V-shaped guide plate 21, a telescopic rod 25 is installed in the middle of the cabinet 1, the telescopic rod 25 is connected to the guide plate 21, and the guide plate 21 is slidably installed inside the cabinet 1; a semiconductor refrigeration plate 22 is installed on a side of the guide plate 21 away from the first-level fan 4; through grooves 17 are opened on both sides of the cabinet 1, and both ends of the guide plate 21 pass through the through grooves 17, and one end of the guide plate 21 located outside the cabinet 1 is connected to the guide groove 23, and one end of the guide groove 23 is connected to the water outlet 24, and the water outlet 24 is attached to the surface of the cabinet 1.

[0023] The device is provided with a storage plate 3 in the cabinet 1 for placing electrical equipment. The first-level fan 4 located below the storage plate 3 can be turned on for a long time in daily use, and air is drawn inward from the first-level air window 13 and then discharged from the second-level air window 15, so that fresh air is used to take away the heat generated by the electrical equipment in the working state, thereby achieving a heat dissipation effect.

[0024] When the humidity in the cabinet 1 is too high, the guide plate 21 located below the first-level fan 4 is raised by using the telescopic rod 25, so that the edge of the guide plate 21 is against the upper wall of the through slots 17 on both sides of the cabinet 1, and the through slots 17 no longer have the function of exhausting air. At the same time, the semiconductor cooling plate 22 below the guide plate 21 is opened, and the surface temperature of the guide plate 21 will drop rapidly until it is close to zero degrees. When the guide plate 21 is raised, the first-level air window 13 and the second-level air window 15 are closed, that is, the area where the electrical equipment is placed in the cabinet 1 becomes a completely enclosed space. At this time, the first-level fan 4 continues to blow air downward, forming a circulation flow inside the cabinet 1. The gas hits the guide plate 21. After contacting the low-temperature guide plate 21, the water vapor originally in the gaseous state quickly condenses into water droplets and remains on the guide plate 21, so that the effect of rapid dehumidification can be achieved. After the dehumidification work is completed, the guide plate 21 is moved down again, so that the water droplets condensed on the surface of the guide plate 21 can pass through the through groove 17 along the inclined surface of the guide plate 21, enter the guide groove 23, and finally be discharged from the water outlet groove 24.

[0025] The telescopic rod 25 used in the present device can use a hydraulic rod or a cylinder, etc., or a mechanical structure with a lifting effect, such as a scissor mechanism or a cam guide groove structure, etc. The present device can automatically dehumidify and drain, and the whole process does not require manual processing or regular maintenance, and is more suitable for long-term use. The present device utilizes low-temperature dehumidification to quickly and efficiently remove excess moisture in the cabinet 1, and will not cause the internal temperature of the cabinet 1 to rise. Instead, the dehumidification process can be used to further reduce the temperature in the cabinet 1. In an environment where dehumidification is not required, the present device can also be used to enhance the heat dissipation effect, significantly improving the protection effect on electrical equipment and improving the safety of long-term use of electrical equipment.

[0026] As another embodiment of the present invention, please refer to Figure 2 and Figure 5 , vertical support rods 27 are respectively installed on both sides of the guide plate 21, and the support rods 27 are close to the inner wall of the cabinet 1, and the support rods 27 pass through the gap between the cabinet 1 and the storage plate 3. The support rods 27 are close to the inner wall of the cabinet 1, so they do not affect the normal placement of electrical equipment. The support rods 27 are used to convert the movement of the guide plate 21 into the control of the primary air louver 13 and the secondary air louver 15.

[0027] See also Figure 2 and Figure 5The support rod 27 is respectively provided with a primary baffle 26 and a secondary baffle 28 corresponding to the primary air louver 13 and the secondary air louver 15. A limiting frame 16 is provided on the inner wall of the cabinet 1, and the primary baffle 26 passes through the limiting frame 16. The primary baffle 26 and the secondary baffle 28 are simultaneously raised when the guide plate 21 is raised, blocking the inside of the primary air louver 13 and the secondary air louver 15, forming a relatively closed environment in the cabinet 1. After the guide plate 21 is lowered, it is lowered accordingly, no longer blocking the primary air louver 13 and the secondary air louver 15, and normal gas flow is restored. The limiting frame 16 is used at a high place to limit the position of the primary baffle 26, and also limits the position of the support rod 27, so that the primary baffle 26 can fully fit the inner wall of the cabinet 1, avoiding the situation that the primary baffle 26 cannot effectively block the primary air louver 13 due to the deflection of the material itself.

[0028] See also Figures 3 to 5 The guide groove 23 has a water inlet 231 on one side thereof that is in contact with the cabinet 1. The guide groove 23 is inclined toward the water outlet groove 24. The water outlet groove 24 is connected with a water outlet pipe 241. The guide groove 23 has an opening on the side. The water gathered on the guide plate 21 is gathered into the guide groove 23 along the water inlet 231, and is gathered into the water outlet groove 24 along the slope inside the guide groove 23, and finally discharged from the water outlet pipe 241. The water outlet pipe 241 can be connected to a pipe leading to a designated drainage system, or can be directly drained outside the cabinet 1, and can be adjusted as needed.

[0029] See also Figure 2 The height of the storage plate 3 and the primary air blower 4 is between the primary air window 13 and the secondary air window 15, the height of the secondary air window 15 is between the primary air blower 4 and the through slot 17, and the width of the through slot 17 is greater than the width of the primary air window 13 and the secondary air window 15. The primary air blower 4 draws air from the primary air window 13 and discharges it from the secondary air window 15. The width of the through slot 17 is the height at which the guide plate 21 can be raised and lowered, so the width of the through slot 17 needs to be greater than the width of the primary air window 13 and the secondary air window 15.

[0030] See also Figures 2 to 4 A grid plate 18 is provided on one side of the cabinet 1 close to the semiconductor cooling sheet 22, a heat sink 5 is installed in the cabinet 1 between the semiconductor cooling sheet 22 and the grid plate 18, and a secondary fan 51 is installed on the heat sink 5. The grid plate 18 is located at the bottom, and the secondary fan 51 on the heat sink 5 is used to dissipate heat for the semiconductor cooling sheet 22. The semiconductor cooling sheet 22 will form a high temperature on the other side when in use, so a separate heat dissipation is required.

[0031] See also Figures 2 to 4, the cabinet 1 is provided with track grooves 19 distributed in an eight-shaped pattern at both ends, and a wiper 6 is connected between the track grooves 19. The wiper 6 is located on the surface of the guide plate 21, and the slope of the track groove 19 is greater than the slope of the two sides of the guide plate 21. The track groove 19 limits the movement track of the wiper 6. Since the slope of the track groove 19 of the wiper 6 is greater than the slope of the single-sided inclination of the guide plate 21, when the guide plate 21 is raised, the passively raised wiper 6 will gradually converge to the middle under the restriction of its own track groove 19 until it is located at the top of the guide plate 21. After the dehumidification is completed, the guide plate 21 moves down, and the wiper 6 moves down against the guide plate 21 under the action of its own weight, and continuously moves outward to discharge the condensed water droplets outward, and the water flow is gathered into a water flow and discharged from the guide plate 21. The connection mode of the wiper plate 6 used in the device is not restrictive. In addition to using gravity to move, a drive can be directly set on the surface of the guide plate 21 to further improve the wiper effect. In addition, the device only requires the wiper plate 6 to scrape off most of the water. The remaining water marks will be re-evaporated by the hot air and discharged from the secondary air window 15 during the process of the primary fan 4 continuing to extract air and dissipate heat.

[0032] See also Figure 1 and Figure 2 A cabinet door 11 is installed on one side of the cabinet 1, a plurality of supporting legs 14 are installed on the outside of the cabinet 1, an inverted V-shaped rainproof eaves 12 is installed on the cabinet 1, and a humidity sensor 7 is arranged inside the cabinet 1. The cabinet door 11 can be opened for installing electrical equipment. In addition to the cabinet door 11, the cabinet 1 should also be provided with a pipe for threading wires. However, since the position of the pipe is different in accordance with different equipment and installation methods, no restrictive description is made. The rainproof eaves 12 is an optional improvement structure. When used outdoors, the rainproof eaves 12 can be selected to enhance the rainproof effect. The humidity sensor is used to monitor the humidity in the cabinet 1 to determine whether the dehumidification structure 2 needs to be turned on.

[0033] The working principle of the present invention is: The device is provided with a storage plate 3 in the cabinet 1 for placing electrical equipment, a first-level fan 4 is provided below the storage plate 3, and a first-level air window 13 is provided above the cabinet 1, and a second-level air window 15 is provided below. The first-level fan 4 realizes continuous circulation of airflow to assist the heat dissipation of the electrical equipment. Through grooves 17 are provided on both sides of the bottom of the cabinet 1, and an inverted V-shaped guide plate 21 is provided in the cabinet 1. A semiconductor refrigeration sheet 22 is fitted on the bottom of the guide plate 21. When dehumidification is needed, the guide plate 21 is raised to close the through groove 17, and the first-level air window 13 and the second-level air window 15 are also closed. The exhaust of the first-level fan 4 realizes the circulation of gas in the cabinet 1, and the gas continuously impacts the low-temperature guide plate 21 and condenses into water droplets on the guide plate 21. The water droplets are subsequently discharged, which can significantly reduce the humidity in the cabinet 1 and achieve the effect of moisture-proof and dehumidification.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A moisture-proof device for electrical equipment, comprising a cabinet; characterized in that: A hollow storage plate is arranged inside the cabinet, and first-level air windows and second-level air windows at different heights are respectively provided on both sides of the cabinet. A dehumidification structure is arranged inside the cabinet, and a first-level fan is arranged on a side of the storage plate close to the dehumidification structure; the dehumidification structure includes an inverted V-shaped guide plate, a telescopic rod is installed in the middle of the cabinet, the telescopic rod is connected to the guide plate, and the guide plate is slidably installed inside the cabinet; a semiconductor refrigeration plate is installed on a side of the guide plate away from the first-level fan; through grooves are provided on both sides of the cabinet, and both ends of the guide plate pass through the through grooves, one end of the guide plate located outside the cabinet is connected to the guide groove, and one end of the guide groove is connected to the water outlet trough, and the water outlet trough fits the surface of the cabinet.

2. The moisture-proof device for electrical equipment according to claim 1, characterized in that: Vertical support rods are respectively installed on both sides of the guide plate, the support rods are in contact with the inner wall of the cabinet, and the support rods pass through the gap between the cabinet and the storage plate.

3. The moisture-proof device for electrical equipment according to claim 2, characterized in that: The support rods are respectively provided with a primary baffle and a secondary baffle corresponding to the primary air louver and the secondary air louver. A limiting frame is arranged on the inner wall of the cabinet, and the primary baffle passes through the limiting frame.

4. The moisture-proof device for electrical equipment according to claim 1, characterized in that: A water inlet is provided on a side of the guide groove that is in contact with the cabinet body. The guide groove is inclined toward the water outlet groove. The water outlet groove is connected with a water outlet pipe.

5. The moisture-proof device for electrical equipment according to claim 1, characterized in that: The height of the storage plate and the first-level fan is located between the first-level air window and the second-level air window, the height of the second-level air window is located between the first-level fan and the through-groove, and the width of the through-groove is greater than the width of the first-level air window and the second-level air window.

6. The moisture-proof device for electrical equipment according to claim 1, characterized in that: A grid plate is arranged on one side of the cabinet body close to the semiconductor refrigeration plate, a heat sink is installed in the cabinet body and is located between the semiconductor refrigeration plate and the grid plate, and a secondary fan is installed on the heat sink.

7. The moisture-proof device for electrical equipment according to claim 1, characterized in that: Both ends of the cabinet are provided with track grooves distributed in an eight-shaped pattern, and wipers are connected between the track grooves. The wipers are located on the surface of the guide plate, and the slope of the track groove is greater than the slopes on both sides of the guide plate.

8. The moisture-proof device for electrical equipment according to claim 1 or 7, characterized in that: A cabinet door is installed on one side of the cabinet body, a plurality of supporting legs are installed outside the cabinet body, an inverted V-shaped rainproof eaves is installed on the cabinet body, and a humidity sensor is arranged inside the cabinet body.

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