External circulation generator outlet voltage transformation cabinet dehumidification device based on DCS control

Abstract

The utility model discloses a DCS control-based dehumidification device for an outlet voltage transformation cabinet of an external circulation generator, which comprises a dehumidifier box body, the front surface of the dehumidifier box body is open, the edge of the front surface of the dehumidifier box body is provided with a rotatable box door, and a touch screen is arranged above the front surface of the box door; an air inlet is formed in the upper portion of the left side face of the dehumidifier box body, an air outlet is formed in the lower portion of the left side face of the dehumidifier box body, a drying air pipe is arranged on the upper portion of the right side face of the dehumidifier box body, and an air return pipe is arranged on the lower portion of the right side face of the dehumidifier box body. According to the utility model, the touch screen can send data of an operator to the communication interface machine, the communication interface machine is interconnected with the DCS control system through a protocol converter, the DCS control system can control the start and stop of the dehumidifier, and meanwhile, the humidity sensor installed on the air return pipe can monitor the humidity in the machine end voltage transformation cabinet. And automatic control of 55% RH-80% RH humidity is carried out on the machine end voltage transformation cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification of pressure transformer cabinets, in particular to a dehumidification device for a pressure transformer cabinet at an outlet of an external circulation generator based on DCS control. Background Art

[0002] Most of the transformer cabinets at the outlet of power plant generators are installed at the 0-meter or 6.3-meter level of the main plant, and no independent distribution room is set. They are easily affected by the cold and hot interaction of electrical equipment and the environmental humidity. Condensation occurs on the insulators, insulating plates and conductive mechanisms in the cabinets. In severe cases, it may even cause a serious accident of generator grounding tripping. In order to solve the condensation problem of the outlet transformer cabinet, generally, sealing is combined with a micro-cabinet dehumidifier system for moisture-proofing. However, since the micro-dehumidifier is installed inside the transformer cabinet, an independent 220V power supply and drainage system are required, and the transformer cabinet is connected with high-voltage components above 20,000V, there is a great safety risk. At the same time, such equipment cannot meet the real-time cabinet humidity monitoring and online maintenance during operation.

[0003] In view of the above situation, the present utility model is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a dehumidification device for an external circulation generator outlet voltage transformer cabinet based on DCS control, so as to solve the problems mentioned in the background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions.

[0006] The utility model provides a dehumidification device for an outlet transformer cabinet of an external circulation generator based on DCS control, comprising a dehumidifier case, the front of which is open, a rotatable case door is arranged on the front edge of the dehumidifier case, and a touch screen is arranged above the front of the case door;

[0007] An air inlet is arranged above the left side of the dehumidifier housing, an air outlet is arranged below the left side of the dehumidifier housing, a drying air duct is arranged above the right side of the dehumidifier housing, and a return air duct is arranged below the right side of the dehumidifier housing;

[0008] A drying air butterfly valve is arranged at one end of the drying air duct away from the dehumidifier casing, a return air butterfly valve and a humidity sensor are arranged at one end of the return air duct away from the dehumidifier casing, and the humidity sensor is located between the return air butterfly valve and the dehumidifier casing; a dehumidification structure is also arranged in the dehumidifier casing.

[0009] Preferably, the dehumidification structure includes a bracket, a rotating wheel, a transmission belt, a driving disk and a motor. The bracket is installed in a suspended state on the inner top surface of the dehumidifier case, the rotating wheel is rotatably installed on the bracket, the motor is installed on the inner bottom surface of the dehumidifier case, the driving disk is installed on the driving shaft of the motor, the driving disk is located directly below the rotating wheel, and the transmission belt is wrapped around the rotating wheel and the driving disk.

[0010] Preferably, the drying air butterfly valve and the return air butterfly valve are both one-way valves, and the air flow directions inside the drying air butterfly valve and the return air butterfly valve are opposite.

[0011] Preferably, it also includes a machine-end voltage transformer cabinet, a communication interface machine and a DCS control system, the end of the drying air duct away from the dehumidifier casing is connected to the machine-end voltage transformer cabinet, and the end of the return air duct away from the dehumidifier casing is connected to the machine-end voltage transformer cabinet.

[0012] Preferably, the touch screen signal is connected to a communication interface machine, and the communication interface machine signal is connected to a DCS control system.

[0013] Preferably, the humidity sensor signal is connected to a DCS control system.

[0014] Preferably, the drying air duct and the return air duct are both provided with filter screens.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The defrosting structure works, and the external air enters the dehumidifier through the air inlet, and after being dried, enters the drying air duct, and then enters the machine-side transformer cabinet to squeeze out the humid air in the machine-side transformer cabinet. The humid air in the machine-side transformer cabinet passes through the return air duct and enters the dehumidifier chassis, and is then discharged through the exhaust port. In this way, the humid air in the machine-side transformer cabinet is discharged through the circulation of air; the touch screen can send the operator's data to the communication interface machine, and interconnect with the DCS control system through the protocol conversion. The DCS control system can realize the start and stop control of the dehumidifier, and at the same time realize the humidity monitoring function in the machine-side transformer cabinet through the humidity sensor installed on the return air duct, and automatically control the humidity of the machine-side transformer cabinet at 55%RH-80%RH. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the utility model;

[0019] Figure 3 The utility model is a logic block diagram of the work.

[0020] In the figure: 1. Dehumidifier cabinet; 11. Air inlet; 12. Air outlet; 2. Cabinet door; 21. Touch screen; 3. Dry air duct; 31. Dry air butterfly valve; 4. Return air duct; 41. Return air duct butterfly valve; 42. Humidity sensor; 5. Dehumidification structure; 51. Bracket; 52. Rotor; 53. Transmission belt; 54. Driving wheel; 55. Motor; 6. Machine-end voltage transformer cabinet; 7. Communication interface machine; 8. DCS control system. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] like Figure 1-3 As shown, a dehumidification device for an external circulation generator outlet transformer cabinet based on DCS control includes a dehumidifier housing 1, the front of the dehumidifier housing 1 is open, a rotatable housing door 2 is arranged on the front edge of the dehumidifier housing 1, the housing door 2 can be opened or closed, and a touch screen 21 is arranged above the front of the housing door 2;

[0024] An air inlet 11 is provided above the left side of the dehumidifier housing 1, an air outlet 12 is provided below the left side of the dehumidifier housing 1, a drying air duct 3 is provided above the right side of the dehumidifier housing 1, and a return air duct 4 is provided below the right side of the dehumidifier housing 1;

[0025] A dry air butterfly valve 31 is provided at one end of the dry air duct 3 away from the dehumidifier casing 1, and a return air butterfly valve 41 and a humidity sensor 42 are provided at one end of the return air duct 4 away from the dehumidifier casing 1. The humidity sensor 42 is located between the return air butterfly valve 41 and the dehumidifier casing 1; a dehumidification structure 5 is also provided in the dehumidifier casing 1.

[0026] The dehumidification structure 5 includes a bracket 51, a rotating wheel 52, a transmission belt 53, a driving disk 54 and a motor 55. The bracket 51 is installed in a suspended state on the inner top surface of the dehumidifier case 1, the rotating wheel 52 is rotatably installed on the bracket 51, the motor 55 is installed on the inner bottom surface of the dehumidifier case 1, the driving disk 54 is installed on the driving shaft of the motor 55, the driving disk 54 is located directly below the rotating wheel 52, and the transmission belt 53 is wrapped around the rotating wheel 52 and the driving disk 54.

[0027] The drying air butterfly valve 31 and the return air butterfly valve 41 are both one-way valves, and the air flows in the drying air butterfly valve 31 and the return air butterfly valve 41 in opposite directions.

[0028] It also includes a machine-end transformer cabinet 6, a communication interface machine 7 and a DCS control system 8. The end of the drying air duct 3 away from the dehumidifier cabinet 1 is connected to the machine-end transformer cabinet 6, and the end of the return air duct 4 away from the dehumidifier cabinet 1 is connected to the machine-end transformer cabinet 6.

[0029] The touch screen 21 is connected to the communication interface machine 7 by signal, and the communication interface machine 7 is connected to the DCS control system 8 by signal.

[0030] The humidity sensor 42 signal is connected to the DCS control system 8 .

[0031] The drying air duct 3 and the return air duct 4 are both provided with filter screens.

[0032] In summary: the butterfly valve is isolated from the high-voltage equipment in the machine-end transformer cabinet, and can be repaired online, which is highly flexible. The exhaust port is directly discharged to the outdoors in the form of moist air, and there is no need to lay condensed water pipes, which is not prone to drainage blockage.

[0033] When the defrost structure 5 is working, the external air enters the dehumidifier through the air inlet 11, and after being dried, enters the drying air duct 3, and then enters the machine-end transformer cabinet 6, squeezing out the humid air in the machine-end transformer cabinet 6. The humid air in the machine-end transformer cabinet 6 passes through the return air duct 4 and enters the dehumidifier case 1, and is then discharged through the exhaust port 12. In this way, the humid air in the machine-end transformer cabinet 6 is discharged through the circulation of air.

[0034] The humidity sensor 42 of the return air duct 4 converts the humidity into 4-20mA and transmits it to the DCS control system 8, realizing the real-time monitoring function of the humidity inside the machine-end transformer cabinet 6. The touch screen 21 sends it to the communication interface machine 7 in the form of RS485 communication, and interconnects and controls with the DCS control system 8 through protocol conversion, realizing automatic control of the humidity of the machine-end transformer cabinet at 55%RH-80%RH;

[0035] The dry air processed by the outside is sent to the machine-end pressure transformer cabinet 6 through the dry air duct 3 by the rotary dehumidification structure 5, and the humid air in the machine-end pressure transformer cabinet 6 is sent back to the dehumidification structure in the dehumidifier case 1 through the return air duct 4, and discharged to the outside atmosphere through the exhaust port 12. At the same time, the dry air duct 3 and the return air duct 4 are both installed with butterfly valves and coarse filters to prevent foreign matter from entering the interior of the extreme pressure transformer cabinet 6;

[0036] The touch screen 21 can send the operator's data to the communication interface machine 7, and interconnect with the DCS control system 8 through the protocol conversion. The DCS control system 8 can realize the start and stop control of the dehumidifier. At the same time, the humidity monitoring function in the machine-end voltage transformer cabinet 6 is realized through the humidity sensor 42 installed on the return air duct 4, and the machine-end voltage transformer cabinet is automatically controlled to 55% RH-80% RH.

[0037] 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 dehumidification device for an external circulation generator outlet transformer cabinet based on DCS control, characterized in that: It comprises a dehumidifier housing (1), the front of the dehumidifier housing (1) is open, a rotatable housing door (2) is arranged at the front edge of the dehumidifier housing (1), and a touch screen (21) is arranged above the front of the housing door (2); An air inlet (11) is arranged above the left side of the dehumidifier housing (1), an air outlet (12) is arranged below the left side of the dehumidifier housing (1), a drying air duct (3) is arranged above the right side of the dehumidifier housing (1), and a return air duct (4) is arranged below the right side of the dehumidifier housing (1); A drying air butterfly valve (31) is arranged at one end of the drying air duct (3) away from the dehumidifier casing (1), and a return air butterfly valve (41) and a humidity sensor (42) are arranged at one end of the return air duct (4) away from the dehumidifier casing (1), wherein the humidity sensor (42) is located between the return air butterfly valve (41) and the dehumidifier casing (1); a dehumidification structure (5) is also arranged inside the dehumidifier casing (1).

2. According to the DCS-controlled external circulation generator outlet voltage transformer cabinet dehumidification device of claim 1, it is characterized by: The dehumidification structure (5) comprises a bracket (51), a rotating wheel (52), a transmission belt (53), a driving disk (54) and a motor (55); the bracket (51) is mounted in a suspended manner on the inner top surface of the dehumidifier housing (1); the rotating wheel (52) is rotatably mounted on the bracket (51); the motor (55) is mounted on the inner bottom surface of the dehumidifier housing (1); the driving disk (54) is mounted on the driving shaft of the motor (55); the driving disk (54) is located directly below the rotating wheel (52); and the transmission belt (53) is wrapped around the rotating wheel (52) and the driving disk (54).

3. According to the DCS-controlled external circulation generator outlet voltage transformer cabinet dehumidification device of claim 1, it is characterized by: The drying air butterfly valve (31) and the return air butterfly valve (41) are both one-way valves, and the air flows in the drying air butterfly valve (31) and the return air butterfly valve (41) in opposite directions.

4. According to the DCS-controlled external circulation generator outlet voltage transformer cabinet dehumidification device of claim 1, it is characterized by: It also includes a machine-end voltage transformer cabinet (6), a communication interface machine (7) and a DCS control system (8); one end of the drying air duct (3) away from the dehumidifier housing (1) is connected to the machine-end voltage transformer cabinet (6); and one end of the return air duct (4) away from the dehumidifier housing (1) is connected to the machine-end voltage transformer cabinet (6).

5. According to claim 4, a dehumidification device for an external circulation generator outlet voltage transformer cabinet based on DCS control is characterized in that: The touch screen (21) is signal-connected to a communication interface machine (7), and the communication interface machine (7) is signal-connected to a DCS control system (8).

6. According to the DCS-controlled external circulation generator outlet voltage transformer cabinet dehumidification device of claim 4, it is characterized by: The humidity sensor (42) signal is connected to the DCS control system (8).

7. According to the DCS-controlled external circulation generator outlet voltage transformer cabinet dehumidification device of claim 1, it is characterized by: The drying air duct (3) and the return air duct (4) are both provided with filter screens.

Images