Program control box heat dissipation device of air cooling island flushing equipment
By using the cold air in the air-cooled island air room to dissipate heat, the problem of PLC and inverter in the program-cooled island cannot work normally under the high temperature conditions in the air-cooled island, and effective temperature reduction and normal operation of the equipment are achieved.
Patent Information
- Application Number
- CN202520444910.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Under the high temperature conditions of the air-cooled island of the thermal power plant in summer, the PLC and inverter in the program-controlled box cannot work normally, resulting in the inability to operate the cleaning equipment and affecting the heat exchange efficiency of the air-cooled island.
Design a program-controlled box heat dissipation device for air-cooled island flushing equipment. By using the cold air in the air-cooled island wind room to efficiently dissipate heat, the temperature in the box will drop below 40℃ to ensure the normal operation of the PLC and the inverter.
The temperature in the program control box was successfully reduced, ensuring that the PLC and frequency converter operate normally under high temperature conditions in summer, solving the problem that the program control box cannot work due to high temperatures, and improving the heat exchange efficiency of the air-cooled island.
Smart Images
Figure CN222776506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air cooling island flushing in a thermal power plant, in particular to a program-controlled box heat dissipation device for air cooling island flushing equipment. Background Art
[0002] The air-cooling island of a thermal power plant uses ambient air as a cooling medium to cool the high-temperature steam flowing in the tubes, and achieves a cooling effect by exchanging heat with the air, thereby achieving the purpose of water recycling and saving water resources. However, if the air-cooling island is exposed to the outside for a long time, dust and dirt will accumulate on the heat dissipation tube bundles and fins, blocking the air flow channel, resulting in a decrease in the heat exchange efficiency of the air-cooling island, an increase in the back pressure of the unit, and an increase in coal consumption, which reduces the economic efficiency of the unit's power generation.
[0003] At this time, it is extremely important for the flushing equipment on the air-cooling island to regularly flush and clean the heat dissipation fins on the air-cooling island, especially in the summer working conditions in the northwest region, where the ambient temperature can reach up to 40°C. At this time, the temperature on the air-cooling island can reach up to 70°C. In this case, the cleaning equipment needs to have the functions of unattended and remote control. Therefore, the cleaning equipment on the air-cooling island generally requires a programmable control box to control the cleaning equipment. However, for the high temperature of the air-cooling island under summer working conditions, the PLC used to store the program and the frequency converter for adjusting the motor frequency in the programmable control box cannot work properly, resulting in the inability of the cleaning equipment to operate, and thus the inability to flush the heat dissipation fins of the air-cooling island in time, affecting the heat exchange efficiency of the air-cooling island.
[0004] In view of this phenomenon, the utility model studies the structure of the program control box and how to cope with the high temperature environment under summer working conditions. Summary of the invention
[0005] The purpose of the utility model is to provide a heat dissipation device for a programmable control box of an air-cooled island flushing equipment. By utilizing the cold air in the air chamber of the air-cooled island to efficiently dissipate the heat of the programmable control box, the temperature inside the box can be successfully reduced to below 40°C under high temperature conditions in summer, ensuring the normal operation of the PLC and the frequency converter, and solving the problem that the programmable control box cannot work due to high temperature.
[0006] To achieve the above-mentioned purpose, the utility model provides a program-controlled box heat dissipation device for air-cooled island flushing equipment, comprising an A-type tower and a box body arranged outside the tower wall of the A-type tower, the box body is fixedly connected to the tower wall of the A-type tower through a box body bracket, and air inlet holes and air outlet holes are respectively opened on both sides of the box body;
[0007] The air inlet is connected to the wind chamber in the A-type tower through an air inlet duct, the air inlet duct runs through the wall of the A-type tower and is connected to an air inlet, the air outlet is connected to large and small openings through a fan, the large and small openings are connected to the wind chamber in the A-type tower through an air outlet duct, and the air outlet duct runs through the wall of the A-type tower and is connected to an air outlet.
[0008] Preferably, a temperature sensor and a PLC controller are provided in the box, and the temperature sensor and the fan are electrically connected to the PLC controller.
[0009] Preferably, a blocking mechanism is provided inside the box body at the air inlet, and the blocking mechanism includes a first circular plate, pearl cotton and a second circular plate which are arranged in sequence from the inside to the outside, and fastening holes are provided at the center positions of the first circular plate, the pearl cotton and the second circular plate, a lead screw is penetrated through the fastening hole, a lifting ring is fixedly provided at one end of the lead screw close to the first circular plate, a fastening nut is screwed at one end of the lead screw close to the second circular plate, and a gasket is provided between the fastening nut and the second circular plate.
[0010] Preferably, a dust cover is provided at the air outlet, and a dust net is provided at the air inlet.
[0011] Preferably, the air inlet and the air outlet are arranged diagonally, the air inlet is opened at the bottom of one side of the box body, and the air outlet is opened at the top of the other side of the box body.
[0012] Preferably, the diameter of the air inlet hole is 100 mm.
[0013] Preferably, the diameter of the air outlet is 200 mm.
[0014] Preferably, the A-type tower wall is provided with through holes corresponding to the air inlet duct and the air outlet duct.
[0015] Preferably, the opening of the large and small openings close to one end of the fan is larger than the opening of the large and small openings away from one end of the fan.
[0016] Preferably, the diameter of the large and small openings at one end close to the fan is 200 mm, and the diameter of the large and small openings at one end away from the fan is 100 mm.
[0017] Therefore, the utility model adopts the above-mentioned program-controlled box heat dissipation device of the air-cooled island flushing equipment, and the beneficial effects are as follows:
[0018] (1) The air inlet and outlet of the box of the utility model adopt an upper and lower angle distribution design to ensure that the cold air in the air chamber can enter the box over a large area to achieve uniform cooling. At the same time, the air outlet is designed with a variable diameter to reduce material usage and reduce wind pressure loss.
[0019] (2) The utility model realizes automatic start and stop of the fan through linkage control of the temperature sensor and PLC, thus avoiding long-term operation of the fan, further reducing energy consumption and extending the service life of the equipment.
[0020] (3) The heat dissipation and exhaust structure designed by the utility model is simple, easy to install, has low electricity demand, and low subsequent maintenance cost, and is suitable for long-term use in high temperature environments of air-cooled islands.
[0021] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a front view of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0023] Figure 2 It is a left view of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0024] Figure 3 It is a wind direction schematic diagram of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0025] Figure 4 It is a front view of the position relationship between the box body and the A-type tower of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0026] Figure 5 It is a left view of the positional relationship between the box body and the A-type tower of an embodiment of a program-controlled box heat dissipation device for air-cooled island flushing equipment of the utility model;
[0027] Figure 6 It is a schematic diagram of the connection between the box body and the A-type tower of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0028] Figure 7 It is a schematic diagram of the installation of a blocking mechanism of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0029] Figure 8 It is a right view of a blocking mechanism of an embodiment of a program-controlled box heat dissipation device of an air-cooled island flushing equipment of the utility model;
[0030] Fig. 9 The utility model is a front view of a blocking mechanism of a program-controlled box heat dissipation device embodiment of an air-cooled island flushing equipment.
[0031] Reference numerals
[0032] 1. Type A tower; 101. Steam distribution pipe; 102. Heat dissipation fin tube bundle; 103. Condensate recovery pipe; 2. Box body; 3. Box body bracket; 4. Air inlet duct; 5. Air inlet; 6. Fan; 7. Large and small openings; 8. Air outlet duct; 9. Air outlet; 10. Dust cover; 11. First round plate; 12. Pearl cotton; 13. Second round plate; 14. Screw; 15. Lifting ring; 16. Fastening nut; 17. Gasket. DETAILED DESCRIPTION
[0033] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.
[0034] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0035] In the case that the program control box of the cleaning equipment cannot operate normally under summer working conditions, the ambient temperature and the temperature of the control box are measured, and it is found that the temperature of the air cooling island is about 65℃ during the period of the highest ambient temperature every day. Since the material of the box 2 is 304 stainless steel, the surface temperature is maintained at around 60℃, and the temperature of the PLC controller and the inverter inside the box 2 is about 57.5℃. When the temperature inside the box 2 is cooled by installing a semiconductor air conditioner on the side of the box 2, it is found that the temperature inside the box 2 is indeed reduced and can reach below 40℃ after the installation. However, the semiconductor air conditioner can withstand high temperatures of 55℃. If it continues to work in the high temperature environment of the air cooling island, it will lose its cooling effect and cannot work normally. In addition, the cooling speed inside the box 2 is relatively slow. However, for the air cooling island, its own function is to dissipate heat for the circulating water of the thermal power plant, so the large heat dissipation of the air cooling island can be used to dissipate heat in a small volume for the program control box.
[0036] like Figure 4As shown, the A-type tower 1 on the air-cooling island includes a steam distribution pipe 101, a heat dissipation fin tube bundle 102 and a condensate recovery pipe 103 arranged in sequence from top to bottom. A large cooling fan is arranged below the A-type tower 1 to suck the air at the bottom of the air-cooling island into the wind chamber. The temperature of the wind chamber is 5-20°C. The air in the wind chamber is introduced into the box body 2 through the air pressure and airflow in the wind chamber, and then the hot air in the box body 2 is introduced into the wind chamber to realize the heat dissipation and exhaust of the programmable control box.
[0037] like Figure 1 As shown, a programmable box heat dissipation device for air-cooled island flushing equipment includes an A-type tower 1 and a box body 2 (programmable box body) arranged on the outside of the tower wall of the A-type tower 1. The box body 2 is fixedly connected to the tower wall of the A-type tower 1 through a box body bracket 3. The box body bracket 3 plays a key role in supporting and stabilizing the box body in the entire device. In actual application, there is no strict restriction on the material of the box body bracket 3. Relevant technical personnel can flexibly select suitable materials according to actual usage scenarios, cost budgets and other factors, as long as the selected material can meet the functional requirements of supporting and stabilizing the box body bracket 3 in the device after rust-proof treatment. For example, it can be made of 304 stainless steel square tubes welded or carbon steel angle irons.
[0038] In this embodiment, the box body 2 is designed as a ventilated box body, that is, air inlet holes and air outlet holes are respectively opened on both sides of the box body 2, the air inlet holes and the air outlet holes are arranged diagonally, and the air inlet holes are opened at the bottom of one side of the box body 2, and the air outlet holes are opened at the top of the other side of the box body 2.
[0039] The diameter of the air inlet is 100 mm, which is connected to the wind chamber in the A-type tower 1 through the air inlet duct 4. The air inlet duct 4 can be made of 304 stainless steel pipe. The air inlet duct 4 penetrates the tower wall of the A-type tower 1 and is connected with an air inlet 5. The diameter of the air outlet is 200 mm. The air outlet is connected with large and small ports 7 through the fan 6. The large and small ports 7 are connected to the wind chamber in the A-type tower 1 through the air outlet duct 8. The air outlet duct 8 penetrates the tower wall of the A-type tower 1 and is connected with an air outlet 9. The air outlet duct 8 is also made of 304 stainless steel pipe. The tower wall of the A-type tower 1 is provided with through holes corresponding to the air inlet duct 4 and the air outlet duct 8.
[0040] Working principle: Since the wind pressure in the air chamber is high, a fan 6 needs to be added to the air outlet duct 8 introduced into the air chamber to guide the hot air out. In this embodiment, a fan 6 with a power of not less than 70W and a diameter of 200mm is connected to the air outlet of the box 2. The actual power can be accurately adjusted according to the exhaust volume to ensure that the fan 6 can operate efficiently under different working conditions and meet the system's requirements for air flow guidance.
[0041] Since there is a certain wind pressure in the wind chamber, it will hinder the airflow. In order to enable the fan to promote the air circulation and allow the hot air in the box 2 to be discharged smoothly, the power of the fan 6 must be large enough to overcome the influence of the wind pressure in the wind chamber, so that the airflow can circulate and achieve the purpose of cooling.
[0042] The opening of the large and small ports 7 near the fan 6 is larger than the opening at the end away from the fan 6. According to the size of the air outlet aperture, the diameter of the large and small ports 7 near the fan 6 is 200mm, and the diameter of the large and small ports away from the fan 6 is 100mm, so as to realize the diameter change of the large and small heads from DN200 to DN100, and then connect the DN100 304 stainless steel pipe to pass into the air chamber, which can reduce the material used, and has a small opening in the air chamber, and the wind pressure at the air outlet 9 is small. The two holes of the box body 2 are diagonally distributed up and down, so that the cool air in the air chamber can enter the box body 2 as large as possible.
[0043] Under the condition of low ambient temperature, the temperature inside the box 2 is within the temperature range suitable for the electrical components. At this time, there is no need to cool the box 2 additionally. However, since the wind pressure inside the air chamber is greater than the external wind pressure, foreign matter and dust can easily enter by the pressure difference. In addition, when the fan 6 is stopped, the wind pressure in the air cooling island wind chamber is relatively high, and natural wind may also blow into the box 2 from the air inlet 5. Therefore, in order to prevent foreign matter and dust from entering the box 2, this device is designed to block and ensure the cleanliness of the box 2:
[0044] First, if Figure 6 As shown, a dust cover 10 is provided at the air outlet 9, and a dust net is provided at the air inlet 5, so as to effectively prevent dust and other impurities from entering the interior of the device and affecting the heat dissipation effect.
[0045] Secondly, if Figure 7-Figure 9 As shown, a blocking mechanism is arranged at the air inlet inside the box 2, and the blocking mechanism includes a first circular plate 11 with a diameter of 100 mm, an EPE 12 with a thickness of 50 mm, and a second circular plate 13 with a diameter of 50 mm, which are arranged in sequence from the inside to the outside. The first circular plate 11, the EPE 12, and the second circular plate 13 are all provided with a fastening hole with a diameter of 11 mm at the center position, and a lead screw 14 is arranged through the fastening hole. A lifting ring 15 is fixedly arranged at one end of the lead screw 14 close to the first circular plate 11, and this design greatly facilitates subsequent installation and maintenance operations; and a fastening nut 16 is screwed at one end of the lead screw 14 close to the second circular plate 13. In order to further enhance the sealing performance, a gasket 17 with a diameter of 50 mm is arranged between the fastening nut 16 and the second circular plate 13, thereby fully ensuring that the blocking mechanism can play a key role in efficiently and stably blocking foreign matter and dust.
[0046] After the device of the utility model is arranged, the temperature in the box 2 drops significantly. Under the high temperature working condition in summer, the temperature in the box 2 is below 40°C, and the frequency converter and PLC controller in the box 2 can operate normally. The cooling effect of the heat dissipation system is significant, and the installation is simple and quick, the demand for electricity is relatively small, and the later maintenance cost is low.
[0047] In addition, a temperature sensor and a PLC controller are provided in the box 2 of the utility model. The temperature sensor and the fan 6 are electrically connected to the PLC controller. The PLC controller can realize automatic control of the fan 6 of the box 2. By adding a temperature sensor, the real-time temperature in the box 2 can be detected.
[0048] Specifically, the temperature sensor is connected to the PLC controller in the box 2. The PLC controller collects data from the temperature sensor and monitors the temperature in the box 2 in real time. When the monitored temperature is higher than the set temperature, the PLC controller outputs a corresponding signal, connects the power supply of the fan 6, starts the fan 6, and discharges the hot air in the box 2 into the air chamber. As the fan 6 continues to work, the temperature in the box 2 gradually decreases. When the temperature drops below the safe temperature, the PLC controller collects the signal from the temperature sensor again. At this time, the PLC outputs a stop signal, cuts off the power supply of the fan 6, and reasonably regulates the operation of the fan 6, effectively realizing energy conservation and emission reduction.
[0049] Therefore, the utility model adopts the above-mentioned programmable control box heat dissipation device of the air-cooled island flushing equipment, and uses the cold air in the air chamber of the air-cooled island to dissipate the heat of the programmable control box, thereby significantly reducing the temperature inside the box, ensuring that the temperature inside the box is always maintained below the safe operating temperature under high temperature conditions in summer, so that the PLC and frequency converter can work normally; an automatically controlled fan system is adopted, which is linked with the PLC through a temperature sensor to realize the intelligent start and stop of the fan, effectively reducing electricity consumption and achieving the effect of energy saving and emission reduction.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.
Claims
1. A program-controlled box heat dissipation device for air-cooled island flushing equipment, characterized in that: It comprises an A-type tower and a box body arranged outside the tower wall of the A-type tower, the box body is fixedly connected to the tower wall of the A-type tower through a box body bracket, and air inlet holes and air outlet holes are respectively opened on both sides of the box body; The air inlet is connected to the wind chamber in the A-type tower through an air inlet duct, the air inlet duct runs through the wall of the A-type tower and is connected to an air inlet, the air outlet is connected to large and small openings through a fan, the large and small openings are connected to the wind chamber in the A-type tower through an air outlet duct, and the air outlet duct runs through the wall of the A-type tower and is connected to an air outlet.
2. The program-controlled box heat dissipation device of the air-cooled island flushing equipment according to claim 1 is characterized in that: A temperature sensor and a PLC controller are arranged in the box, and both the temperature sensor and the fan are electrically connected to the PLC controller.
3. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: A blocking mechanism is arranged at the air inlet inside the box, and the blocking mechanism includes a first circular plate, pearl cotton, and a second circular plate arranged in sequence from the inside to the outside. Fastening holes are opened at the center positions of the first circular plate, the pearl cotton, and the second circular plate, and a lead screw is penetrated through the fastening hole. A lifting ring is fixedly arranged at one end of the lead screw close to the first circular plate, and a fastening nut is screwed at one end of the lead screw close to the second circular plate, and a gasket is arranged between the fastening nut and the second circular plate.
4. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: A dust cover is arranged at the air outlet, and a dust net is arranged at the air inlet.
5. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: The air inlet and the air outlet are arranged diagonally, the air inlet is opened at the bottom of one side of the box body, and the air outlet is opened at the top of the other side of the box body.
6. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: The diameter of the air inlet hole is 100 mm.
7. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: The diameter of the air outlet is 200 mm.
8. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: The A-type tower wall is provided with through holes corresponding to the air inlet duct and the air outlet duct.
9. The program-controlled box heat dissipation device for air-cooled island flushing equipment according to claim 1 is characterized in that: The opening of the large and small openings close to one end of the fan is larger than the opening of the one end away from the fan.
10. The program-controlled box heat dissipation device of the air-cooled island flushing equipment according to claim 9, characterized in that: The diameter of the large and small openings at one end close to the fan is 200 mm, and the diameter of the large and small openings at one end away from the fan is 100 mm.