A control device for a PLC-based transformer cooling system

Abstract

This invention provides a control device for a PLC-based transformer cooling system, belonging to the field of control device technology. It includes: a fixed base; the fixed base is fixed to a transformer mounting base, and a rectangular box-shaped cooling box is fixed to the top surface of the fixed base. The cooling box is filled with cooling liquid, and a cover plate is fixed to the top of the cooling box. A first liquid pump is fixed to the top surface of the fixed base, and a first inlet pipe and a first outlet pipe are connected to the first liquid pump. Both the first inlet pipe and the first outlet pipe are connected to the transformer cooling oil pipe. The replenishment assembly, consisting of a storage tank, a supply pipe, a guide rod, and a float, forms an automatic liquid replenishment system. When the liquid in the cooling box decreases due to evaporation or consumption, liquid automatically flows into the storage tank to replenish it. When the liquid reaches a suitable level, the float rises due to buoyancy, sealing the supply pipe and automatically stopping replenishment, ensuring that the cooling system is always in optimal working condition and effectively avoiding the risk of cooling failure due to insufficient liquid.

Description

Technical Field

[0001] This invention relates to the field of control device technology, and in particular to a control device based on a PLC transformer cooling system. Background Technology

[0002] During the power conversion process, transformers inevitably experience losses, leading to temperature increases. This temperature rise not only affects the transformer's load-carrying capacity but also accelerates the aging of its internal insulation materials, shortening its service life and ultimately negatively impacting the economy and stability of the power system. Therefore, cooling is necessary, which requires the use of cooling system control devices.

[0003] The existing control and protection circuits of large power transformer air-cooled heat dissipation devices mainly rely on switching elements such as relays and contactors. This makes the cooling and heat dissipation control system prone to defects, increases the cost of operation and maintenance, and affects the stable operation of the power system. During cooling, it is not possible to achieve cooling simultaneously through multiple cooling structures. Summary of the Invention

[0004] This invention relates to a control device for a PLC-based transformer cooling system, which solves the problem that the control and protection circuits of existing large power transformer air-cooled heat dissipation devices mainly rely on switching elements such as relays and contactors. This leads to defects in the cooling and heat dissipation control system, increases the cost of operation and maintenance, and affects the stable operation of the power system. In addition, it solves the problem that cooling cannot be achieved simultaneously through multiple cooling structures.

[0005] This invention provides a control device for a PLC-based transformer cooling system, specifically including: a fixed base; the fixed base is fixed on a transformer mounting base, and a rectangular box-shaped cooling box is fixed on the top surface of the fixed base. The cooling box is filled with cooling liquid, and a cover plate is fixed on the top surface of the cooling box; a first liquid pump is fixed on the top surface of the fixed base, and a first inlet pipe and a first outlet pipe are connected to the first liquid pump. Both the first inlet pipe and the first outlet pipe are connected to the transformer cooling oil pipe. The first inlet pipe passes through the cooling box, and the part of the first inlet pipe inside the cooling box has a continuously curved structure.

[0006] Furthermore, a second liquid inlet pipe is fixed to the top surface of the cover plate, and a second liquid outlet pipe is fixed to the front end of the cooling box. The second liquid inlet pipe is connected to an external cooling liquid supply pipe, and the second liquid outlet pipe is connected to an external liquid collection box.

[0007] Furthermore, the cooling chamber, cover plate, first liquid pump, first liquid inlet pipe, first liquid outlet pipe, second liquid inlet pipe and second liquid outlet pipe together constitute a cooling assembly; a cooling pipe is fixed inside the cooling chamber and is connected to an external cooling gas supply pipe.

[0008] Furthermore, the cooling pipe is located below the first liquid inlet pipe, and the cooling pipe has a wavy structure.

[0009] Furthermore, the cooling box is equipped with an auxiliary component, which consists of a sliding frame, a mixing plate, a motor, a threaded rod, a nozzle, a second liquid pump, and a spray hole. A sliding frame slides on the cooling box, and a mixing plate is fixed at one end of the front side of the sliding frame. The mixing plate is located inside the cooling box. A motor is fixed at the rear end of the cooling box, and a threaded rod is fixed on the output shaft of the motor. The threaded rod is threadedly connected to the sliding frame.

[0010] Furthermore, a nozzle is fixed to the bottom end face of the mixing plate, and a second liquid pump is fixed to the top end face of the fixing base. The inlet pipe of the second liquid pump is located inside the cooling box, and the outlet pipe of the second liquid pump is connected to the nozzle.

[0011] Furthermore, the nozzle is a cylindrical tubular structure, and spray holes are arranged in a fan-shaped array on the lower part of the outer wall of the nozzle.

[0012] Furthermore, a supplementary component is fixed to the top surface of the fixed base. The supplementary component consists of a liquid storage tank, a liquid supply pipe, a guide rod, and a float block. A liquid storage tank is fixed to the top surface of the fixed base, and a liquid supply pipe is connected to the liquid storage tank. The other end of the liquid supply pipe is connected to the cooling box. A guide rod slides on the cover plate, and one end of the guide rod is fixed to the float block. The left end face of the float block contacts the left end face of the inner wall of the cooling box. When the float block slides upward, it can seal the liquid supply pipe.

[0013] Furthermore, a control box is fixed to the top surface of the mounting base, a microprocessor is installed inside the control box, and a temperature sensor is installed on the front surface of the mixing plate, the temperature sensor being electrically connected to the microprocessor.

[0014] This invention provides a control device based on a PLC transformer cooling system, which has the following advantages:

[0015] In terms of basic cooling efficiency, the first liquid pump drives the circulation of oil in the transformer cooling oil pipe. The first inlet pipe extends deep into the cooling box and adopts a continuous curved structure, which greatly increases the contact area and time between the oil and the cooling liquid in the box, allowing the oil to fully release heat as it flows through the cooling box. At the same time, the cooling liquid circulation channel formed by the second inlet pipe and the second outlet pipe realizes the real-time renewal of the cooling liquid in the box, ensuring the high efficiency of the cooling medium and giving the oil a dual cooling effect. In addition, the wavy cooling pipe located below the first inlet pipe introduces cooling gas. Its unique shape design allows the cold airflow to diffuse more evenly, further reducing the oil temperature from the bottom. The synergistic effect of multiple cooling methods significantly improves the overall cooling efficiency.

[0016] In terms of optimizing the cooling effect, the auxiliary components are ingeniously and practically designed. The motor drives the threaded rod to rotate, which in turn drives the sliding frame and mixing plate to reciprocate back and forth in the cooling chamber. At the same time, the second liquid pump draws out the liquid in the chamber and sprays it out through the fan-shaped array of nozzles at the bottom of the nozzle. This combination of mechanical stirring and liquid spraying achieves all-round and high-intensity mixing of the liquid in the cooling chamber, making the liquid temperature distribution more uniform and the heat exchange with the oil in the first liquid inlet pipe more complete, further enhancing the cooling effect.

[0017] The device also boasts excellent intelligent control and stable operation guarantee mechanisms. The microprocessor within the control box and the temperature sensor at the front end of the mixing board form an intelligent feedback system. The temperature sensor monitors the temperature inside the cooling chamber in real time and transmits the data to the microprocessor. When the temperature exceeds a preset threshold, the microprocessor automatically increases the power of the first liquid pump, accelerating oil circulation and enhancing cooling capacity. When the temperature falls below the threshold, the power is reduced to avoid energy waste, achieving dynamic and precise adjustment of cooling intensity. The replenishment component, consisting of a storage tank, supply pipe, guide rod, and float, forms an automatic replenishment system. When the liquid in the cooling chamber decreases due to evaporation or consumption, liquid automatically flows from the storage tank to replenish it. When the liquid reaches the appropriate level, the float rises under buoyancy, sealing the supply pipe and automatically stopping replenishment, ensuring the cooling system is always in optimal working condition and effectively avoiding the risk of cooling failure due to insufficient liquid. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached diagram:

[0021] Figure 1 This diagram shows an axial view of the control device for the PLC transformer cooling system of the present invention.

[0022] Figure 2 The present invention is shown. Figure 1 A schematic diagram of the rotated axial view structure;

[0023] Figure 3 This shows a partially cut-out axial view of the control device of the PLC transformer cooling system of the present invention.

[0024] Figure 4 The present invention is shown. Figure 3 A magnified structural diagram at point A;

[0025] Figure 5This shows a partially cut-out front view of the control device of the PLC transformer cooling system of the present invention.

[0026] Figure 6 A schematic diagram of the axial view structure of the auxiliary component of the present invention is shown;

[0027] Figure 7 The present invention is shown. Figure 6 A magnified structural diagram at point B;

[0028] Figure 8 A schematic diagram of the system configuration of the present invention is shown.

[0029] List of reference numerals

[0030] 1. Fixed base; 2. Cooling assembly; 201. Cooling chamber; 202. Cover plate; 203. First liquid pump; 204. First liquid inlet pipe; 205. First liquid outlet pipe; 206. Second liquid inlet pipe; 207. Second liquid outlet pipe; 3. Cooling pipe; 4. Auxiliary assembly; 401. Sliding frame; 402. Mixing plate; 403. Motor; 404. Threaded rod; 405. Nozzle; 406. Second liquid pump; 407. Nozzle; 5. Replenishment assembly; 501. Liquid storage tank; 502. Liquid supply pipe; 503. Guide rod; 504. Float block; 6. Control box; 601. Microprocessor; 602. Temperature sensor. Detailed Implementation

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used in embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in this embodiment of the invention.

[0033] The terms "first," "second," and similar words used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Likewise, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "rear," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of the invention; however, it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect," "link," "fix," and "attach" can refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein.

[0034] Example 1: Please refer to Figures 1 to 8 :

[0035] This invention proposes a control device for a PLC-based transformer cooling system, comprising: a mounting base 1; the mounting base 1 is fixed on a transformer mounting base, and a rectangular box-shaped cooling box 201 is fixed to the top surface of the mounting base 1. The cooling box 201 is filled with cooling liquid, and a cover plate 202 is fixed to the top of the cooling box 201; a first liquid pump 203 is fixed to the top surface of the mounting base 1, and a first inlet pipe 204 and a first outlet pipe 205 are connected to the first liquid pump 203. Both the first inlet pipe 204 and the first outlet pipe 205 are connected to the transformer cooling system. The oil pipe is connected, and the first liquid inlet pipe 204 passes through the cooling box 201. The part of the first liquid inlet pipe 204 inside the cooling box 201 has a continuous curved structure. During use, the first liquid pump 203 is started, and the oil in the transformer cooling oil pipe begins to circulate under the drive of the first liquid pump 203. The circulation can achieve the cooling of the transformer. When the oil flows through the area of ​​the cooling box 201, the liquid in the cooling box 201 can complete the cooling of the first liquid inlet pipe 204 and the oil inside the first liquid inlet pipe 204, ensuring the cooling effect of the transformer.

[0036] The cover plate 202 has a second liquid inlet pipe 206 fixed on its top surface, and the cooling box 201 has a second liquid outlet pipe 207 fixed at its front end. The second liquid inlet pipe 206 is connected to the external cooling liquid supply pipe, and the second liquid outlet pipe 207 is connected to the external liquid collection tank. During use, the cooling liquid enters the cooling box 201 through the second liquid inlet pipe 206 and comes into contact with the first liquid inlet pipe 204 to cool the oil. Then the liquid is discharged through the second liquid outlet pipe 207, which cools the oil in the first liquid inlet pipe 204 again.

[0037] The cooling box 201, cover plate 202, first liquid pump 203, first liquid inlet pipe 204, first liquid outlet pipe 205, second liquid inlet pipe 206 and second liquid outlet pipe 207 together form the cooling component 2; a cooling pipe 3 is fixed inside the cooling box 201, and the cooling pipe 3 is connected to the external cooling gas supply pipe.

[0038] The cooling pipe 3 is located below the first liquid inlet pipe 204. The cooling pipe 3 has a wavy structure. During use, cooling gas enters the interior of the cooling pipe 3. At this time, the cold air diffuses to the surroundings, realizing the cooling of the first liquid inlet pipe 204 and the internal oil, ensuring the cooling effect of the subsequent oil on the transformer.

[0039] The cooling chamber 201 is equipped with an auxiliary component 4, which consists of a sliding frame 401, a mixing plate 402, a motor 403, a threaded rod 404, a nozzle 405, a second liquid pump 406, and a spray hole 407. A sliding frame 401 slides on the cooling chamber 201, and a mixing plate 402 is fixed to one end of the front side of the sliding frame 401. The mixing plate 402 is located inside the cooling chamber 201. A motor 403 is fixed to the rear end face of the cooling chamber 201, and a threaded rod 404 is fixed to the output shaft of the motor 403. The threaded rod 404 is threadedly connected to the sliding frame 401. When mixing the liquid in the cooling box 201, the drive motor 403 can rotate back and forth. The motor 403 drives the threaded rod 404 to rotate. Under the reciprocating drive of the threaded rod 404, the sliding frame 401 and the mixing plate 402 can move back and forth, thus realizing the mixing of the liquid in the cooling box 201. By mixing the liquid in the cooling box 201, the cooling of the oil in the first liquid inlet pipe 204 can be better achieved.

[0040] A nozzle 405 is fixed to the bottom surface of the mixing plate 402, and a second liquid pump 406 is fixed to the top surface of the fixing base 1. The inlet pipe of the second liquid pump 406 is located inside the cooling box 201, and the outlet pipe of the second liquid pump 406 is connected to the nozzle 405. When the second liquid pump 406 is started, it draws out the liquid in the cooling box 201 and then discharges it into the cooling box 201 through the nozzle 405. At this time, the liquid inside the cooling box 201 is remixed, thereby improving the cooling effect on the oil in the first inlet pipe 204.

[0041] The nozzle 405 is a cylindrical tubular structure. The lower part of the outer wall of the nozzle 405 has spray holes 407 arranged in a fan-shaped array. The liquid sprayed from the fan-shaped array of spray holes 407 can expand the mixing effect on the liquid in the cooling box 201.

[0042] The top surface of the fixed base 1 is fixed with a replenishment component 5, which consists of a liquid storage tank 501, a liquid supply pipe 502, a guide rod 503, and a float block 504. The top surface of the fixed base 1 is fixed with a liquid storage tank 501, and a liquid supply pipe 502 is connected to the liquid storage tank 501. The other end of the liquid supply pipe 502 is connected to the cooling box 201. A guide rod 503 slides on the cover plate 202. One end of the guide rod 503 is fixed to the float block 504. The left end of the float block 504 contacts the left end of the inner wall of the cooling box 201. When the float block 504 slides upward, it can seal the liquid supply pipe 502. During use, when the liquid in the cooling box 201 gradually decreases, the liquid in the liquid storage tank 501 can be replenished through the liquid supply pipe 502. When enough liquid is replenished, the float block 504 seals the liquid supply pipe 502 under the action of buoyancy, and the replenishment automatically stops.

[0043] Example 2, based on Example 1, such as Figures 1-8 As shown, a control box 6 is fixed to the top surface of the mounting base 1. A microprocessor 601 is installed inside the control box 6. A temperature sensor 602 is installed on the front surface of the mixing plate 402. The temperature sensor 602 is electrically connected to the microprocessor 601. During use, the temperature sensor 602 transmits temperature information to the microprocessor 601 in real time. When the temperature information is higher than the threshold in the microprocessor 601, the microprocessor 601 increases the power of the first liquid pump 203. At this time, the first liquid pump 203 increases the circulation speed, thereby improving the circulation and cooling effect of the oil in the first inlet pipe 204. When the temperature information is lower than the threshold in the microprocessor 601, the microprocessor 601 reduces the power of the first liquid pump 203.

[0044] The working principle of this embodiment is as follows: Temperature sensor 602 transmits temperature information to microprocessor 601 in real time. When the temperature information is higher than the threshold in microprocessor 601, microprocessor 601 increases the power of first liquid pump 203. At this time, first liquid pump 203 increases the circulation speed, thereby improving the cooling effect of oil circulation in first inlet pipe 204. When the temperature information is lower than the threshold in microprocessor 601, microprocessor 601 reduces the power of first liquid pump 203. Driven by first liquid pump 203, it is used for transformer cooling. The oil in the oil pipe begins to circulate, cooling the transformer. When the oil flows through the cooling box 201, the liquid in the cooling box 201 cools the first inlet pipe 204 and the oil inside it. Simultaneously, cooling liquid enters the cooling box 201 through the second inlet pipe 206 and contacts the first inlet pipe 204, further cooling the oil. The liquid then exits through the second drain pipe 207, achieving a second cooling of the oil in the first inlet pipe 204. Meanwhile, the cooling... However, gas enters the cooling pipe 3, and the cold air diffuses to the surroundings, achieving cooling of the first liquid inlet pipe 204 and the internal oil. To achieve liquid mixing in the cooling box 201, the drive motor 403 rotates reciprocally. The motor 403 drives the threaded rod 404 to rotate, and the reciprocating drive of the threaded rod 404 enables the sliding frame 401 and the mixing plate 402 to move back and forth, thus achieving liquid mixing in the cooling box 201. Mixing the liquid in the cooling box 201 better achieves the desired cooling effect in the first liquid inlet pipe. The oil in cooling tank 204 is cooled down. At the same time, the second liquid pump 406 is started, which draws out the liquid in cooling tank 201 and discharges it into the cooling tank 201 through nozzle 405. This achieves the re-mixing of the liquid inside cooling tank 201. Meanwhile, as the liquid in cooling tank 201 gradually decreases, the liquid in storage tank 501 can be replenished through liquid supply pipe 502. When enough liquid is replenished, the float 504 seals the liquid supply pipe 502 under the action of buoyancy, and the replenishment stops automatically.

Claims

1. A control device based on a PLC transformer cooling system, characterized in that, include: Fixed base (1); The fixed base (1) is fixed on the transformer mounting base. A rectangular box-shaped cooling box (201) is fixed on the top surface of the fixed base (1). The cooling box (201) is filled with cooling liquid. A cover plate (202) is fixed on the top of the cooling box (201). A first liquid pump (203) is fixed on the top surface of the fixed base (1). A first liquid inlet pipe (204) and a first liquid outlet pipe (205) are connected to the first liquid pump (203). The first liquid inlet pipe (204) and the first liquid outlet pipe (205) are both connected to the transformer cooling oil pipe. The first liquid inlet pipe (204) passes through the cooling box (201). The part of the first liquid inlet pipe (204) inside the cooling box (201) is a continuous curved structure. A second liquid inlet pipe (206) is fixed on the top surface of the cover plate (202), and a second liquid outlet pipe (207) is fixed on the front end of the cooling box (201). The second liquid inlet pipe (206) is connected to the cooling liquid supply pipe of the external equipment, and the second liquid outlet pipe (207) is connected to the liquid collection box of the external equipment. The cooling chamber (201), cover plate (202), first liquid pump (203), first liquid inlet pipe (204), first liquid outlet pipe (205), second liquid inlet pipe (206) and second liquid outlet pipe (207) together constitute the cooling assembly (2); a cooling pipe (3) is fixed inside the cooling chamber (201), and the cooling pipe (3) is connected to the external cooling gas supply pipe; The cooling tube (3) is located below the first liquid inlet tube (204), and the cooling tube (3) has a wavy structure; An auxiliary component (4) is installed on the cooling box (201). The auxiliary component (4) consists of a sliding frame (401), a mixing plate (402), a motor (403), a threaded rod (404), a nozzle (405), a second liquid pump (406), and a spray hole (407). A sliding frame (401) slides on the cooling box (201). A mixing plate (402) is fixed at one end of the front side of the sliding frame (401). The mixing plate (402) is located inside the cooling box (201). A motor (403) is fixed at the rear end of the cooling box (201). A threaded rod (404) is fixed on the output shaft of the motor (403). The threaded rod (404) is threadedly connected to the sliding frame (401). A nozzle (405) is fixed on the bottom surface of the mixing plate (402), and a second liquid pump (406) is fixed on the top surface of the fixing base (1). The inlet pipe of the second liquid pump (406) is located inside the cooling box (201), and the outlet pipe of the second liquid pump (406) is connected to the nozzle (405).

2. The control device for a PLC-based transformer cooling system according to claim 1, characterized in that, The nozzle (405) is a cylindrical tubular structure, and the lower part of the outer wall of the nozzle (405) is provided with nozzle holes (407) in a fan-shaped array.

3. The control device for a PLC-based transformer cooling system according to claim 1, characterized in that, The top surface of the fixed base (1) is fixed with a supplementary component (5). The supplementary component (5) consists of a liquid storage tank (501), a liquid supply pipe (502), a guide rod (503), and a floating block (504). The top surface of the fixed base (1) is fixed with a liquid storage tank (501). A liquid supply pipe (502) is connected to the liquid storage tank (501). The other end of the liquid supply pipe (502) is connected to the cooling box (201). A guide rod (503) slides on the cover plate (202). One end of the guide rod (503) is fixed to the floating block (504). The left end of the floating block (504) contacts the left end of the inner wall of the cooling box (201). When the floating block (504) slides upward, it can seal the liquid supply pipe (502).

4. The control device for a PLC-based transformer cooling system according to claim 1, characterized in that, A control box (6) is fixed on the top surface of the fixed base (1). A microprocessor (601) is installed inside the control box (6). A temperature sensor (602) is installed on the front surface of the mixing plate (402). The temperature sensor (602) is electrically connected to the microprocessor (601).

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