Power-saving control device for power distribution equipment

Abstract

The utility model discloses a power-saving control device for power distribution equipment, which comprises a control box and a frequency converter arranged on one side wall of an inner cavity of the control box, two opposite side walls of the control box are respectively connected with a flow guide cover, two fans are respectively arranged in the two flow guide covers, the wind directions of the two fans are the same, and the frequency converter is connected with the frequency converter. Temperature sensors are installed on the top wall and the bottom wall of an inner cavity of the control box, a PLC is further installed on the top wall of the inner cavity of the control box, supports are welded to the two sides of the side wall, where the frequency converter is located, in the inner cavity of the control box correspondingly, and servo motors are installed at the bottoms of the two supports correspondingly; the two servo motors, the two fans and the two temperature sensors are all electrically connected with the PLC, sliding grooves are formed in the two supports, and output shafts of the two servo motors are coaxially connected with screw rods respectively. According to the power-saving control device used by the power distribution equipment, the heat dissipation requirement of operation of the frequency converter is guaranteed, continuous operation of the fan is not needed, and dust entering is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power distribution equipment, and in particular relates to a power saving control device used for power distribution equipment. Background Art

[0002] Power distribution equipment refers to a set of equipment used for power, power distribution and lighting in low-voltage power distribution systems in power plants, substations and factories and mines. Some facilities in the power distribution equipment, such as control cabinets, provide a large amount of power to external carriers. Since the power of each carrier is different, frequency converters are equipped to operate carriers of different powers with appropriate power output, so as to achieve a more energy-saving effect.

[0003] In the process of implementing the utility model, the inventors found that there are at least the following problems in this technology: the frequency converters (collectively referred to as control devices) currently used to make power distribution equipment more energy-efficient, such as the patent with application number CN202021788060.1 - an energy-saving and power-saving control device used in power distribution equipment, under the action of the heat dissipation fan, the hot air flow is accelerated in the inner cavity of the control cabinet, and then discharged to the outside of the control cabinet after passing through the air outlet channel and the air outlet in turn, thereby achieving heat dissipation; but in order to ensure heat dissipation, the heat dissipation fan needs to work continuously, which increases the probability of dust entering the inside.

[0004] To this end, we propose a power-saving control device for use in power distribution equipment to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a power-saving control device for use in power distribution equipment, which ensures the heat dissipation requirements of the inverter operation without having to keep the fan running continuously, reduces the entry of dust, and can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A power-saving control device for power distribution equipment comprises a control box and a frequency converter installed on one side wall of an inner cavity of the control box, air guide covers are connected to two opposite side walls of the control box, fans are installed in the two air guide covers respectively, and the wind directions of the two fans are the same, temperature sensors are installed on the top wall and the bottom wall of the inner cavity of the control box, and a PLC is also installed on the top wall of the inner cavity of the control box;

[0008] Brackets are welded on both sides of the side wall where the frequency converter is located in the inner cavity of the control box, wherein servo motors are respectively installed at the bottom of the two brackets, and the two servo motors, two fans and two temperature sensors are electrically connected to the PLC, and slide grooves are formed on the two brackets, and the output shafts of the two servo motors are coaxially connected to screw rods, and closing plates are threadedly sleeved on the two screw rods, and one end of the two closing plates is located in the slide groove and fits with the inner wall of the slide groove, and the other ends of the two closing plates extend out from the two slide grooves and extend toward the two air guide covers respectively, so as to facilitate the closing of the two air guide covers by the two closing plates.

[0009] As a preferred embodiment, the opening of the control box cavity is located on one side wall thereof, and a side cover plate is provided as a sealing cover at the opening of the control box cavity, and bolts penetrating into the control box are installed at the four corners of the side cover plate, so that the side cover plate is fixed to the control box.

[0010] As a preferred embodiment, ear plates are fixedly connected to the four corners of the side wall of the control box facing away from the side cover plate, and threaded holes are tapped in the horizontal direction on the four ear plates; by installing screws on the four ear plates and passing the screws into the power distribution equipment or other installation locations, the control box can be fixed to the power distribution equipment or other designated installation locations.

[0011] As a preferred implementation scheme, dustproof nets and grille plates are respectively installed at the openings on both sides of the air duct cover; the dustproof net plays a certain role in preventing dust from entering the control box cavity, and the grille plate isolates foreign objects between the control box and the air duct cover, thereby also protecting the fan.

[0012] As a preferred implementation scheme, two screw rods are respectively vertically arranged in two slide grooves, and the two screw rods are respectively rotatably connected to two brackets; so that the screw rods can operate stably, and the servo motor and all power structures in the control box need to be powered by external power facilities.

[0013] As a preferred embodiment, a plurality of air holes are provided on one side of the two closing plates close to the air guide cover, so as to facilitate the air flow to pass slowly and take away the heat released by the inverter in the control box.

[0014] In summary, the technical effects and advantages of the utility model are as follows:

[0015] The power-saving control device used in the power distribution equipment monitors the internal ambient temperature in real time by installing a temperature sensor in the control box. When the temperature is high and reaches a temperature that is unfavorable to the inverter, the PLC first drives the two servo motors to operate, so that the two air deflectors are opened, and the PLC then drives the two fans to operate, speeding up the air circulation rate and discharging heat more quickly. When the temperature drops to a set reasonable temperature, the two fans stop running and the two air deflectors are closed by the closing plate, thereby ensuring the heat dissipation requirements of the inverter operation, without the need for the fans to continue running, and reducing the entry of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a vertical cross-sectional view of the utility model;

[0018] Figure 3 For this utility model Figure 2 A magnified view of the structure in the middle.

[0019] In the figure: 1. control box; 2. side cover; 3. ear plate; 4. air deflector; 5. dust screen; 6. grille plate; 7. fan; 8. inverter; 9. temperature sensor; 10. PLC; 11. bracket; 12. servo motor; 13. slide; 14. screw; 15. closing plate; 16. air vent. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-Figure 3 , a power-saving control device for power distribution equipment, comprising a control box 1 and a frequency converter 8 installed on one side wall of the inner cavity of the control box 1, the opening of the inner cavity of the control box 1 is located on one side wall thereof, and a sealing cover at the opening of the inner cavity of the control box 1 is provided with a side cover plate 2, bolts penetrating into the control box 1 are installed at the four corners of the side cover plate 2, so that the side cover plate 2 is fixed to the control box 1, ear plates 3 are fixedly connected to the four corners of the side wall of the control box 1 facing away from the side cover plate 2, and threaded holes are tapped on the four ear plates 3 in the horizontal direction, and the control box 1 can be fixed to the power distribution equipment or other designated installation positions by installing screws on the four ear plates 3 and penetrating the screws into the power distribution equipment or other installation positions;

[0022] The two opposite side walls of the control box 1 are respectively connected with air deflectors 4, wherein two air deflectors 4 are respectively installed with fans 7, and dustproof nets 5 and grille plates 6 are respectively installed at the openings on both sides of the air deflectors 4, so that the dustproof nets 5 play a certain role in preventing dust from entering the inner cavity of the control box 1, and the grille plates 6 isolate foreign matter between the control box 1 and the air deflectors 4, which also plays a role in protecting the fans 7. The wind directions of the two fans 7 are the same, and temperature sensors 9 are installed on the top and bottom walls of the inner cavity of the control box 1, and a PLC 10 is also installed on the top wall of the inner cavity of the control box 1. The temperature sensor 9 can refer to the technical principle of the pt100 model, and the PLC 10 can refer to the technical principle of the S7-200 model;

[0023] Brackets 11 are welded on both sides of the side wall where the frequency converter 8 is located in the inner cavity of the control box 1, wherein servo motors 12 are respectively installed at the bottom of the two brackets 11, and the two servo motors 12, two fans 7 and two temperature sensors 9 are electrically connected to the PLC 10. Slide grooves 13 are formed on the two brackets 11, and the output shafts of the two servo motors 12 are coaxially connected with screw rods 14, respectively. The two screw rods 14 are respectively vertically arranged in the two slide grooves 13, and the two screw rods 14 are respectively rotatably connected to the two brackets 11, so that the screw rods 14 can operate stably, and the servo motors 12 and all power structures in the control box 1 need to be powered by external power facilities;

[0024] A closing plate 15 is threadedly sleeved on the two screw rods 14, and one end of the two closing plates 15 is located in the slide groove 13 and fits against the inner wall of the slide groove 13, and the other ends of the two closing plates 15 extend out from the two slide grooves 13 and extend toward the two air guide covers 4 respectively, so as to facilitate the closing of the two air guide covers 4 by the two closing plates 15, and a plurality of air holes 16 are provided on one side of the two closing plates 15 close to the air guide covers 4, so as to facilitate the air flow to pass slowly and take away the heat released by the inverter 8 in the control box 1.

[0025] The power-saving control device used in the power distribution equipment: when in use, the inverter 8 is in a continuous operation state, so it continuously releases heat in the inner cavity of the control box 1, and the heat will slowly flow through the two air guide covers 4 and the air holes 16 on the two closing plates 15 and be discharged to the outside. However, if the ambient temperature is high, or the inverter 8 is continuously under high load, it may cause the ambient temperature in the control box 1 to reach a temperature that is unfavorable to the inverter 8 (the threshold of the temperature can be customized), and the two temperature sensors 9 monitor the temperature in real time. When the temperature sensor 9 detects the unfavorable temperature, it transmits an electrical signal to PLC10, and at this time PLC10 will transmit an electrical signal to Two servo motors 12 are used to drive the two screws 14 to operate, so that the two closing plates 15 move upward, thereby opening the two air guide covers 4 (this process takes 2 to 3 seconds). After 3 seconds, PLC10 drives the two fans 7 to operate, thereby accelerating the air circulation rate in the control box 1 and quickly discharging heat. When the temperature monitored by the two temperature sensors 9 reaches a safe temperature (the temperature threshold is also customized), PLC10 drives the two servo motors 12 to reverse, so that the two closing plates 15 re-close the two air guide covers 4, and at the same time the two fans 7 stop to reduce dust entry.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power-saving control device for power distribution equipment, comprising a control box (1) and a frequency converter (8) mounted on a side wall of an inner cavity of the control box (1), characterized in that: The two opposite side walls of the control box (1) are respectively connected to air guide covers (4), wherein two fans (7) are respectively installed in the two air guide covers (4), and the wind directions of the two fans (7) are the same; the top wall and the bottom wall of the inner cavity of the control box (1) are both installed with temperature sensors (9), and the top wall of the inner cavity of the control box (1) is also installed with a PLC (10); Brackets (11) are welded on both sides of a side wall where the frequency converter (8) is located in the inner cavity of the control box (1), wherein servo motors (12) are respectively installed at the bottom of the two brackets (11), and the two servo motors (12), two fans (7) and two temperature sensors (9) are electrically connected to the PLC (10). A slide groove (13) is formed on the two brackets (11), and the output shafts of the two servo motors (12) are coaxially connected to screw rods (14), and the two screw rods (14) are respectively threadedly sleeved with closing plates (15), and one end of the two closing plates (15) is located in the slide groove (13) and fits with the inner wall of the slide groove (13), and the other end of the two closing plates (15) extends out from the two slide grooves (13) and extends toward the two air guide covers (4) respectively.

2. The power-saving control device for power distribution equipment according to claim 1, characterized in that: The opening of the inner cavity of the control box (1) is located on one side wall thereof, and a side cover plate (2) is provided as a sealing cover at the opening of the inner cavity of the control box (1), and bolts penetrating into the control box (1) are installed at the four corners of the side cover plate (2).

3. The power saving control device for power distribution equipment according to claim 2, characterized in that: The four corners of the side wall of the control box (1) facing away from the side cover plate (2) are all fixedly connected with ear plates (3), and the four ear plates (3) are all tapped with threaded holes in the horizontal direction.

4. The power saving control device for power distribution equipment according to claim 1, characterized in that: Dust-proof nets (5) and grille plates (6) are respectively installed at the openings on both sides of the air deflector (4).

5. The power saving control device for power distribution equipment according to claim 1, characterized in that: The two screw rods (14) are respectively vertically arranged in the two slide grooves (13), and the two screw rods (14) are respectively rotatably connected to the two brackets (11).

6. The power saving control device for power distribution equipment according to claim 1, characterized in that: A plurality of air holes (16) are provided on one side of the two closing plates (15) close to the air guide cover (4).

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