A PLC electrical automation control device

Abstract

The utility model provides a PLC electrical automation control device, which comprises a control cabinet body and a drying device. A control switch is started to make an air intake component, a refrigeration component and an exhaust component work. The air intake component transports the air in the control cabinet body to a drying box, and then the drying box and the refrigeration component cool and dry the air. The processed air is discharged into a cavity, and then the exhaust component discharges the gas in the cavity out of the control cabinet. At the same time, after the drying box absorbs moisture in the air, the desiccant contained in the bearing plate becomes heavier, and the pressure on the bearing plate becomes larger. At this time, the bearing plate is subjected to unbalanced force, which causes the bearing plate to move downward. At the same time, the bearing plate drives the display component to work, so that the staff can understand the use of the desiccant to replace the desiccant, and at the same time, it is avoided that the control unit is damaged due to the increase in the temperature of the control cabinet body by heating the desiccant, thereby saving financial and human resources.

Description

Technical Field

[0001] The utility model relates to the field of electric control cabinets, in particular to a PLC electric automation control device. Background Art

[0002] Electrical automation control cabinets are used in large plants such as water plants, pumping stations and sewage treatment plants, and the control systems of electrical automation control cabinets are mainly controlled by PLC, so that the water plants, pumping stations and sewage treatment plants can work normally, and the display device on the electrical automation control cabinet can detect the situation inside the electrical automation control cabinet.

[0003] A moisture-proof control cabinet is proposed in the patent with publication number CN218997396U, which includes a moisture-proof control cabinet. The moisture-proof control cabinet includes a control cabinet body and a control unit. A power supply is arranged at the bottom of the control cabinet body. The drying unit includes a drying box. An air inlet is arranged on the side of the drying box away from the power supply. A steam outlet is arranged on the top of the drying box. The drying box is slidably connected with a pressure control mechanism in the vertical direction. A moisture-proof module is arranged at the bottom of the control cabinet. When the moisture-proof module is working, the desiccant in the drying unit absorbs moisture in the air inside the control cabinet. When a certain mass is reached, the moisture-proof box presses the pressure control plate downward, and the heating coil starts to work to heat the specific desiccant in the drying unit to evaporate the moisture and discharge it to the outside of the control cabinet through the hose connected to the top of the drying unit.

[0004] However, evaporating the moisture in a specific desiccant through a heating coil requires a high temperature for evaporation, which may cause the temperature inside the control cabinet to rise during the evaporation process, thereby causing damage to the control unit and wasting manpower and financial resources. Therefore, it is necessary to provide a new PLC electrical automation control device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a PLC electrical automation control device.

[0006] The PLC electrical automation control device provided by the utility model comprises: a control unit, a control cabinet body and a drying device, a plurality of control units are fixedly installed in the inner cavity of the control cabinet body, a cavity is opened at the bottom of the control cabinet body, and a drying device is installed in the cavity;

[0007] The drying device includes a drying box, a carrier plate containing desiccant, an air intake assembly, a display assembly, a refrigeration assembly and an exhaust assembly. The drying box is fixedly installed on the bottom wall of the cavity, the carrier plate is inserted into the interior of the drying box, the air intake assembly is inserted into the top wall of the cavity, and the air intake assembly is fixedly connected to the drying box, an exhaust assembly for discharging gas in the cavity out of the control cabinet body is fixedly installed on the left side wall of the cavity, the refrigeration assembly is fixedly installed on the left side wall of the drying box, one end of the display assembly is installed in the front side wall of the cavity, and the other end of the display assembly is installed on the outer side wall of the drying box, a push-pull plate is inserted in the top wall of the cavity, and the push-pull plate is located above the drying box.

[0008] Preferably, a carrying plate is movably installed in the drying box, a plurality of guide rods are inserted at the four corners of the carrying plate, a through slot is provided on the side wall of the drying box, the bottom of the carrying plate passes through the through slot, one end of the plurality of guide rods extends to the upper end surface of the drying box, and the other ends of the plurality of guide rods are fixedly connected to the bottom wall of the inner cavity of the drying box, elastic parts are nested outside the plurality of guide rods, one end of the elastic part is fixedly installed on the bottom wall of the inner cavity of the drying box, and the other end of the elastic part is fixedly connected to the bottom wall of the carrying plate, and a plurality of through holes for maintaining the air pressure balance between the inside of the drying box and the cavity are provided on the side wall of the drying box.

[0009] Preferably, the air intake assembly includes a first fan, which is inserted into the cavity from the bottom wall of the inner cavity of the control cabinet, and the bottom end of the first fan is fixedly connected to an air duct, and the other end of the air duct is fixedly connected to the side wall of the drying box.

[0010] Preferably, the refrigeration assembly includes a semiconductor refrigeration module, which is fixedly mounted on the outer wall of the drying box, and the cold end of the semiconductor refrigeration module extends into the side wall of the drying box, and the hot end of the semiconductor refrigeration module is fixedly connected to multiple heat sinks, and the multiple heat sinks are in a linear array.

[0011] Preferably, the display assembly includes a rack, which is movably mounted on the outer wall of the drying box, and the bottom end of the rack is fixedly connected to the supporting plate, a gear that cooperates with the rack is movably mounted on the side wall of the drying box, a worm is fixedly mounted on one side of the gear, and the other end of the worm is movably connected to the side wall of the cavity, a fixed shell is fixedly mounted on the side wall of the cavity, a threaded rod is inserted into the fixed shell, the top end of the threaded rod is movably connected to the top wall of the fixed shell, the bottom end of the threaded rod is inserted into the cavity, and a worm wheel is fixedly connected to the bottom end of the threaded rod, the worm wheel cooperates with the worm, and the worm wheel is rotatably connected to the bottom wall of the cavity, a scale plate is inserted between the top wall and the bottom wall of the fixed shell, and the scale plate is movably connected to the lifting plate.

[0012] Preferably, the exhaust assembly includes a second fan, and the second fan is fixedly installed in the left wall of the cavity.

[0013] Compared with the related art, the PLC electrical automation control device provided by the utility model has the following beneficial effects: starting the control switch makes the air intake component, the refrigeration component and the exhaust component work, the air intake component transports the air in the control cabinet body to the drying box, and then the drying box and the refrigeration component cool and dry the air, the treated air will be discharged into the cavity, and then the exhaust component discharges the gas in the cavity out of the control cabinet, at the same time, after the drying box absorbs the moisture in the air, the desiccant contained in the support plate becomes heavier, so that the pressure on the support plate becomes greater, and the force on the support plate is unbalanced at this time, which will cause the support plate to move downward, and at the same time, the support plate drives the display component to work, so that the staff can understand the use of the desiccant to replace the desiccant, and at the same time avoid the control unit damage caused by heating the desiccant and increasing the temperature of the control cabinet body, saving financial and human resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 1 ;

[0015] Figure 2 The overall structural diagram of the PLC electrical automation control device provided by the utility model;

[0016] Figure 3 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 2 ;

[0017] Figure 4 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 3 ;

[0018] Figure 5 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 4 ;

[0019] Figure 6 This is a partial structural cross-sectional top view of the PLC electrical automation control device provided by the utility model.

[0020] Numbers in the figure: 1. control unit; 2. control cabinet body; 3. cavity; 4. drying box; 401. bearing plate; 402. guide rod; 403. spring; 404. through hole; 405. through slot; 5. air intake assembly; 501. first fan; 502. air guide duct; 6. display assembly; 601. rack; 602. gear; 603. worm; 604. fixed shell; 605. lifting plate; 606. threaded rod; 607. worm gear; 608. scale plate; 7. refrigeration assembly; 701. semiconductor refrigeration module; 702. heat sink; 8. exhaust assembly; 801. second fan; 9. battery; 10. push-pull plate; 11. control switch. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1-6 ,in, Figure 1 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 1 ; Figure 2 The overall structural diagram of the PLC electrical automation control device provided by the utility model; Figure 3 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 2 ; Figure 4 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 3 ; Figure 5 Partial structural diagram of the PLC electrical automation control device provided by the utility model Figure 4 ; Figure 6 This is a partial structural cross-sectional top view of the PLC electrical automation control device provided by the utility model.

[0023] In the specific implementation process, the PLC electrical automation control device provided by the utility model includes: a control unit 1, a control cabinet body 2 and a drying device, a plurality of control units 1 are bolted to the inner cavity of the control cabinet body 2, a cavity 3 is opened at the bottom of the control cabinet body 2, and a drying device is installed in the cavity 3;

[0024] like Figure 1 , 2As shown, the drying device includes a control switch 11, a drying box 4, a carrier plate 401 containing a desiccant, an air intake assembly 5, a display assembly 6, a refrigeration assembly 7, an exhaust assembly 8 and a battery 9. The drying box 4 is fixedly installed on the bottom wall of the cavity 3, the carrier plate 401 is inserted into the drying box 4, the air intake assembly 5 is inserted into the top wall of the cavity 3, and the air intake assembly 5 is connected to the drying box 4 through an air duct 502. The left side wall of the cavity 3 is fixedly installed with an exhaust assembly 8 for discharging the gas in the cavity 3 out of the control cabinet body 2. The refrigeration assembly 7 is bolted to the left side wall of the drying box 4. One end of the display assembly 6 is installed in the front side wall of the cavity 3, and the other end of the display assembly 6 is installed on the outer side wall of the drying box 4. The battery 9 is fixedly installed on the bottom wall of the cavity 3. A control switch 11 for controlling whether the battery 9 is working is installed at the bottom end of the control cabinet body 2. A push-pull plate 10 is inserted in the top wall of the cavity 3, and the push-pull plate 10 is above the drying box 4.

[0025] like Figure 3 As shown, a carrying plate 401 is slidably installed in the drying box 4, and a plurality of guide rods 402 are inserted at the four corners of the carrying plate 401. The carrying plate 401 slides along the direction of the plurality of guide rods 402. A through slot 405 is provided on the side wall of the drying box 4. The bottom of the carrying plate 401 partially extends outward along the through slot 405. One ends of the plurality of guide rods 402 extend to the upper end surface of the drying box 4, and the other ends of the plurality of guide rods 402 are welded to the bottom wall of the inner cavity of the drying box 4. Springs 403 are nested outside the plurality of guide rods 402, one end of the spring 403 is welded to the bottom wall of the inner cavity of the drying box 4, and the other end of the spring 403 is welded to the bottom wall of the carrying plate 401. A plurality of through holes 404 are provided on the side wall of the drying box 4 for maintaining the air pressure balance between the inside of the drying box 4 and the cavity 3. The air in the drying box 4 and the air in the cavity 3 circulate with each other through the through holes 404, thereby maintaining the air pressure balance between the inside and outside of the drying box 4, and preventing the air pressure in the drying box 4 from being too high, which causes the working efficiency of the air intake component 5 to be reduced.

[0026] It should be noted that the inner wall of the drying box 4 is a copper plate with good thermal conductivity. When the air enters the drying box 4 through the through hole 404, the refrigeration component 7 continuously cools the inner wall of the drying box 4. When the air contacts the inner wall of the drying box 4, the temperature will drop, so that the water molecules in the air will be liquefied. The liquefied water droplets flow downward along the inner wall of the drying box 4 and flow into the carrier plate 401. At the same time, the air that does not contact the side wall of the drying box 4 has a lower temperature in the drying box 4, resulting in a higher air density, so that it flows from top to bottom. A desiccant (not shown in the figure) is placed in the carrier plate 401. The desiccant absorbs the moisture in the bottom air and the water droplets sliding down along the side wall of the drying box 4. At the same time, due to the cooperation between the through hole 404 and the refrigeration component 7, the air flows slowly in the drying box 4, so that the air can be cooled and dried more fully. The air after drying rises due to the lower water molecule content, and then is discharged from the through hole 404 into the cavity 3.

[0027] like Figure 3-6 As shown, the air intake assembly 5 includes a first fan 501, which is inserted into the cavity 3 from the bottom wall of the inner cavity of the control cabinet body 2, and the bottom end of the first fan 501 is fixedly connected to an air duct, and the other end of the air duct is bonded to the side wall of the drying box 4, and the first fan 501 is electrically connected to the battery 9;

[0028] It should be noted that the air duct is divided into two sections. The section of the air duct connected to the first fan 501 has a smaller diameter, while the section of the air duct connected to the drying box 4 has a larger diameter. When the first fan 501 works to generate airflow, the airflow flows from the section of the air duct with a smaller diameter to the section of the air duct with a larger diameter, thereby slightly slowing down the wind speed. Since a plurality of through holes 404 are provided on the side wall of the drying box 4, the airflow will hit the side wall before entering the drying box 4, and then enter the drying box 4 through the through holes 404, thereby further reducing the airflow speed, so that the airflow can be better cooled and dried after entering the drying box 4.

[0029] The refrigeration assembly 7 includes a semiconductor refrigeration module 701, which is fixedly mounted on the outer wall of the drying box 4. The semiconductor refrigeration module 701 is electrically connected to the battery 9, and the cold end of the semiconductor refrigeration module 701 extends into the side wall of the drying box 4. The hot end of the semiconductor refrigeration module 701 is fixedly connected to a plurality of heat sinks 702, and the plurality of heat sinks 702 are arranged in a linear array. The semiconductor refrigeration module 701 may be a semiconductor refrigeration module 701 with a model number of TED3-060XFA.

[0030] The display assembly 6 includes a rack 601, which is movably mounted on the outer wall of the drying box 4, and the bottom end of the rack 601 is fixedly connected to the bearing plate 401, a gear 602 that cooperates with the rack 601 is movably mounted on the side wall of the drying box 4, a worm 603 is fixedly mounted on one side of the gear 602, and the other end of the worm 603 is movably connected to the side wall of the cavity 3, a fixed shell 604 is fixedly mounted on the side wall of the cavity 3, a threaded rod 606 is inserted into the fixed shell 604, the top of the threaded rod 606 is movably connected to the top wall of the fixed shell 604, the bottom end of the threaded rod 606 is inserted into the cavity 3, and a worm wheel 607 is fixedly connected to the bottom end of the threaded rod 606, the worm wheel 607 cooperates with the worm 603, and the worm wheel 607 is rotatably connected to the bottom wall of the cavity 3, a scale plate 608 is inserted between the top wall and the bottom wall of the fixed shell 604, and the scale plate 608 is movably connected to the lifting plate 605.

[0031] The exhaust assembly 8 includes a second fan 801 , which is fixedly installed in the left wall of the cavity 3 and is electrically connected to the battery 9 .

[0032] The working principle of the utility model is as follows: when it is necessary to dry and dehumidify the air in the control cabinet, the battery 9 is first started by the control switch 11, and the first fan 501, the second fan 801 and the semiconductor refrigeration module 701 start to work. The air in the control cabinet body 2 enters the air duct 502 through the first fan 501. When the air flows from the small-diameter air duct 502 into the large-diameter air duct 502, the air speed is slightly reduced, and then the air flows into the drying box 4 through the through hole 404. At this time, the air flow rate in the drying box 4 is slow, and the semi-automatic refrigeration module 701 is used to cool the air. The conductor refrigeration module 701 continuously cools the drying box 4. The air is cooled and its density increases, thereby decreasing. At the same time, part of the air contacts the inner wall of the drying box 4, causing the temperature to drop rapidly, thereby forming small water droplets. The small water droplets flow into the carrier plate 401 along the inner wall of the drying box 4. The desiccant in the carrier plate 401 absorbs the water droplets and water molecules in the air at a lower position, thereby fully drying the air. After that, the air flows out of the drying box 4 through the through hole 404 and enters the cavity 3. The second fan 801 then discharges the air in the cavity 3 out of the control cabinet.

[0033] As the desiccant in the carrier plate 401 absorbs moisture, the desiccant becomes heavier. As the carrier plate 401 is supported by a plurality of springs 403, the elastic force of the plurality of springs 403 on the carrier plate 401 and the gravity of the carrier plate 401 plus the desiccant reach a balanced state. After the desiccant absorbs moisture, the gravity of the carrier plate 401 plus the desiccant is greater than the elastic force of the springs 403 at this time, so that the carrier plate 401 slides downward along the guide rod 402, thereby driving the rack 601 to slide downward. As the rack 601 is meshed with the gear 602, Driven by the rack 601, the gear 602 rotates, and the worm 603 rotates with the rotation of the gear 602, and then the worm 603 drives the worm wheel 607 matched with it to rotate. Since the worm wheel 607 is connected with a one-way threaded rod 606, the one-way threaded rod 606 is threadedly connected with the lifting plate 605, the one-way threaded rod 606 is driven to rotate by the worm wheel 607, and then the one-way threaded rod 606 drives the lifting plate 605 to rise and fall, so that the reading at this time can be read through the transparent scale plate 608, and it can be determined whether the desiccant needs to be replaced.

[0034] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A PLC electrical automation control device, comprising a control unit (1), characterized in that: It also comprises a control cabinet body (2) and a drying device, wherein a plurality of control units (1) are fixedly installed in the inner cavity of the control cabinet body (2), a cavity (3) is provided at the bottom of the control cabinet body (2), and the drying device is installed in the cavity (3); The drying device comprises a drying box (4), a carrier plate (401) containing a desiccant, an air intake component (5), a display component (6), a refrigeration component (7), an exhaust component (8) and a push-pull plate (10); the drying box (4) is fixedly mounted on the bottom wall of the cavity (3); the carrier plate (401) is inserted into the interior of the drying box (4); the air intake component (5) is inserted into the top wall of the cavity (3); and the air intake component (5) is fixedly connected to the drying box (4); an exhaust component (8) for exhausting gas in the cavity (3) out of the control cabinet body (2) is fixedly mounted on the left side wall of the cavity (3); the refrigeration component (7) is fixedly mounted on the left side wall of the drying box (4); one end of the display component (6) is mounted in the front side wall of the cavity (3); and the other end of the display component (6) is mounted on the outer side wall of the drying box (4); a push-pull plate (10) is inserted into the top wall of the cavity (3); and the push-pull plate (10) is located above the drying box (4).

2. The PLC electrical automation control device according to claim 1, characterized in that: A carrying plate (401) is movably installed in the drying box (4), and a plurality of guide rods (402) are inserted at four corners of the carrying plate (401). A through slot (405) is provided on the side wall of the drying box (4), and the bottom of the carrying plate (401) passes through the through slot (405). One end of each of the plurality of guide rods (402) extends to the upper end surface of the drying box (4), and the other end of each of the plurality of guide rods (402) is fixedly connected to the bottom wall of the inner cavity of the drying box (4). An elastic member is embedded outside the plurality of guide rods (402), and one end of each of the elastic members is fixedly installed on the bottom wall of the inner cavity of the drying box (4), and the other end of each of the elastic members is fixedly connected to the bottom wall of the carrying plate (401). The side wall of the drying box (4) is provided with a plurality of through holes (404) for maintaining the air pressure balance between the interior of the drying box (4) and the cavity (3).

3. The PLC electrical automation control device according to claim 2, characterized in that: The air intake assembly (5) comprises a first fan (501), the first fan (501) being inserted into the cavity (3) from the bottom wall of the inner cavity of the control cabinet body (2), the bottom end of the first fan (501) being fixedly connected to an air duct, and the other end of the air duct being fixedly connected to the side wall of the drying box (4).

4. The PLC electrical automation control device according to claim 3, characterized in that: The refrigeration assembly (7) comprises a semiconductor refrigeration module (701), the semiconductor refrigeration module (701) is fixedly mounted on the outer wall of the drying box (4), and the cold end of the semiconductor refrigeration module (701) extends into the side wall of the drying box (4), and the hot end of the semiconductor refrigeration module (701) is fixedly connected to a plurality of heat sinks (702), and the plurality of heat sinks (702) are arranged in a linear array.

5. The PLC electrical automation control device according to claim 4, characterized in that: The display assembly (6) comprises a rack (601), the rack (601) being movably mounted on the outer wall of the drying box (4), and the bottom end of the rack (601) being fixedly connected to the carrier plate (401), a gear (602) cooperating with the rack (601) being movably mounted on the side wall of the drying box (4), a worm (603) being fixedly mounted on one side of the gear (602), the other end of the worm (603) being movably connected to the side wall of the cavity (3), a fixed shell (604) being fixedly mounted on the side wall of the cavity (3), and the fixed shell (60 4), a threaded rod (606) is inserted into the inner portion, the top end of the threaded rod (606) is movably connected to the top wall of the fixed shell (604), the bottom end of the threaded rod (606) is inserted into the cavity (3), and a worm gear (607) is fixedly connected to the bottom end of the threaded rod (606), the worm gear (607) cooperates with the worm (603), and the worm gear (607) is rotatably connected to the bottom wall of the cavity (3), a scale plate (608) is inserted between the top wall and the bottom wall of the fixed shell (604), and the scale plate (608) is movably connected to the lifting plate (605).

6. The PLC electrical automation control device according to claim 5, characterized in that: The exhaust assembly (8) comprises a second fan (801), and the second fan (801) is fixedly installed in the left side wall of the cavity (3).

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