Cooling system and evaporative cooling transformer

Abstract

The invention relates to a cooling system and an evaporative cooling transformer, the cooling system comprises a cooling device, a gas tank and a condensing device, the cooling device is respectively communicated with a transformer box body of the evaporative cooling transformer through a transformer liquid inlet pipe and a transformer liquid outlet pipe to form a cooling medium circulation loop, and the cooling medium is evaporative cooling liquid; the gas box is arranged on a box cover of the transformer box body, and the gas box is communicated with the transformer box body; the condensing device is connected between the gas tank and the transformer liquid outlet pipe and used for condensing the gaseous cooling medium in the gas tank into a liquid cooling medium and sending the liquid cooling medium into the transformer liquid outlet pipe. The cooling system can cool a gaseous cooling medium into a liquid cooling medium, so that the liquid cooling medium participates in cooling circulation, pressure unbalance in the transformer box body is prevented, and the cooling efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a cooling system and an evaporative cooling transformer. BACKGROUND

[0002] At present, the mainstream transformer products mainly use mineral oil or synthetic fat as the cooling medium. However, the cooling efficiency of such cooling medium is limited, and it has flash and flammability, which has the risk of explosion and cannot completely eliminate the safety hazard. If evaporative cooling liquid is used as the cooling medium, the evaporative cooling liquid can phase change into gas at a certain temperature. Since the latent heat capacity of phase change is much larger than the specific heat capacity of liquid, the cooling efficiency is higher, which can effectively prevent local overheating. In addition, the cooling medium itself and its decomposition product (fluoroalkane) under electric arc are non-flammable and non-explosive, which can fundamentally eliminate the explosion hazard of the transformer.

[0003] Since the evaporative cooling liquid used in the evaporative cooling transformer has the characteristic of phase change into gas, and these gases are mainly concentrated at the top of the transformer tank, after a long time of operation, the gaseous cooling medium increases, which will cause the pressure in the transformer tank to increase, the liquid level of the liquid cooling medium to decrease, and the gaseous cooling medium to be unable to cool the cooling cycle, resulting in a decrease in cooling efficiency. SUMMARY

[0004] The first object of the present application is to provide a cooling system, which can liquefy the gaseous cooling medium to participate in the cooling cycle, so as to balance the pressure in the transformer tank and ensure the cooling efficiency.

[0005] The second object of the present application is to provide an evaporative cooling transformer comprising the above cooling system.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] In the first aspect of the present application, a cooling system for an evaporative cooling transformer is provided, comprising:

[0008] A cooling device is in communication with the transformer tank of the evaporative cooling transformer through a transformer liquid inlet pipe and a transformer liquid outlet pipe, respectively, to form a cooling medium circulation loop;

[0009] A gas tank is arranged on the tank cover of the transformer tank, and the gas tank is in communication with the transformer tank;

[0010] A condensing device is connected between the gas tank and the transformer liquid outlet pipe, which is used to condense the gaseous cooling medium in the gas tank into liquid cooling medium and send it into the transformer liquid outlet pipe.

[0011] In a possible implementation manner, a reinforcing rib structure is arranged in the gas tank.

[0012] In a possible implementation, the system further comprises a pressure detection device configured to detect the pressure in the gas tank and control the working state of the cooling device according to the detection value.

[0013] In a possible implementation, the condensing device comprises:

[0014] a condensing pipe connected to the gas tank;

[0015] a reflux pipe connected between the condensing pipe and the transformer outlet pipe.

[0016] In a possible implementation, the condensing device comprises a plurality of condensing pipes, each of which is connected in parallel between the reflux pipe and the gas tank.

[0017] In a possible implementation, the reflux pipe, the transformer inlet pipe and the transformer outlet pipe are respectively provided with control valves.

[0018] In a possible implementation, the cooling device comprises:

[0019] a circulating pump, an inlet of which is in communication with the transformer tank through the transformer outlet pipe;

[0020] a heat exchange device, which comprises a cooling medium channel and a heat exchange medium channel, a cooling medium in the cooling medium channel exchanges heat with a heat exchange medium in the heat exchange medium channel, an outlet of the circulating pump is in communication with an inlet of the cooling medium channel, and an outlet of the cooling medium channel is in communication with the transformer tank through the transformer inlet pipe;

[0021] a driving device configured to drive the heat exchange medium to flow in the heat exchange medium channel.

[0022] In a possible implementation, the transformer outlet pipe is arranged above the transformer inlet pipe, and the transformer outlet pipe and the transformer inlet pipe are respectively connected to the transformer tank on two sides of the transformer tank.

[0023] In a possible implementation, the heat exchange device is a wind-cooled heat exchanger, and the driving device is a fan.

[0024] From the above technical solutions can be seen, the application discloses a cooling system, the cooling system includes cooling device, gas tank and condensing device, wherein, cooling device through transformer inlet pipe and transformer outlet pipe respectively with evaporative cooling transformer transformer box intercommunication, form cooling medium circulation loop, cooling medium is evaporative cooling liquid;Gas tank is arranged on the tank cover of transformer box, and the gas tank is communicated with the transformer box;Condensing device is connected between the gas tank and the transformer outlet pipe, for condensing the gaseous cooling medium in the gas tank into liquid cooling medium, and sending into the transformer outlet pipe.

[0025] In application, cooling device extracts the high-temperature liquid cooling medium after absorbing heat in the transformer box through the transformer outlet pipe, and then sends the low-temperature liquid cooling medium back to the transformer box through the transformer inlet pipe after cooling, at the same time, part of the cooling medium becomes gaseous cooling medium after absorbing heat, the gas tank provides expansion space for the cooling medium after phase change into gaseous state by absorbing heat from the transformer box, the gaseous cooling medium enters the gas tank to avoid occupying the space of the transformer box, and then the gaseous cooling medium enters the condensing device through the gas tank, and after condensing in the condensing device, the gaseous cooling medium becomes high-temperature liquid cooling medium and flows back to the transformer outlet pipe, and enters the cooling device together with the high-temperature liquid cooling medium which does not change phase.

[0026] It can be seen that the cooling system provided by the application can cool the gaseous cooling medium into liquid cooling medium, so that it participates in the cooling cycle, prevents the pressure imbalance in the transformer box, and ensures the cooling efficiency.

[0027] In the second aspect of the application, an evaporative cooling transformer is provided, which comprises a transformer box and the cooling system as described in the first aspect and possible implementation manners, and the gas tank of the cooling system is arranged above the transformer box.

[0028] Since the evaporative cooling transformer adopts the above cooling system, the evaporative cooling transformer should have the same beneficial effects as the above cooling system, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 The top view of the evaporative cooling transformer provided by the embodiments of the application is shown in the figure.

[0031] Figure 2A side view of the evaporative cooling transformer provided by the embodiment of the present application.

[0032] In the figure:

[0033] 100 is a cooling device; 110 is a circulating pump; 120 is a heat exchange device; 200 is a gas tank; 210 is a transverse reinforcing rib; 220 is a longitudinal reinforcing rib; 300 is a transformer liquid inlet pipe; 400 is a transformer liquid outlet pipe; 500 is a condensing device; 510 is a condensing pipe; 520 is a return pipe; 600 is a control valve; 700 is a transformer tank; 710 is a tank body; and 720 is a tank cover. DETAILED DESCRIPTION

[0034] One of the cores of the present application is to provide a cooling system, which is designed to cool and liquefy gaseous cooling medium to participate in a cooling cycle, ensure pressure balance in a transformer tank, and ensure cooling efficiency.

[0035] Another core of the present application is to provide an evaporative cooling transformer comprising the above cooling system.

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] The evaporative cooling transformer generally uses liquid-gas two-phase fluorides as cooling medium. These fluoride cooling media are generally in liquid state at normal temperature. During the operation of the transformer, when the windings and the iron core inside the transformer generate heat due to current passing, magnetic hysteresis, etc., the temperature around the windings rises to a certain extent, and the fluoride cooling medium near the windings first undergoes phase change to generate gaseous cooling medium. The phase change process absorbs a large amount of gasification heat, quickly taking away the heat inside the transformer, thereby realizing efficient cooling.

[0038] The evaporative cooling transformer has excellent fire and explosion prevention performance, high-efficiency heat dissipation, and good overload capacity. The cooling medium used by the evaporative cooling transformer is itself non-flammable and has good fire extinguishing performance, fundamentally eliminating the risk of fire and explosion, and is suitable for use in relatively small spaces and densely populated places, such as locomotives, to effectively avoid major safety accidents caused by transformer failure. Therefore, the evaporative cooling transformer, as a non-flammable and non-explosive, safe and reliable, economical and efficient, green and environmentally friendly, and cost-effective power transmission and transformation equipment, meets the actual needs of certain specific occasions and has been widely used.

[0039] However, the gaseous cooling medium of the evaporative cooling transformer is difficult to be liquefied to participate in the cooling cycle after vaporization. With the increase of the gaseous cooling medium, the internal pressure of the transformer tank is prone to be unbalanced, and the cooling efficiency is affected. Therefore, the embodiment of the present application provides a cooling system for an evaporative cooling transformer.

[0040] Please refer to Figure 1 and Figure 2 The cooling system comprises a cooling device 100, a gas tank 200 and a condensing device 500.

[0041] The cooling device 100 is in communication with the transformer tank 700 of the evaporative cooling transformer through a transformer liquid inlet pipe 300 and a transformer liquid outlet pipe 400, respectively, to form a cooling medium circulation loop, and the cooling medium is evaporative cooling liquid.

[0042] The cooling device 100 extracts the evaporative cooling liquid which is heated after heat exchange with the heat generating components in the transformer tank 700 from the transformer tank 700 through the transformer liquid outlet pipe 400, cools the evaporative cooling liquid, and then drives the evaporative cooling liquid to transport the cooled evaporative cooling liquid into the transformer tank 700 through the transformer liquid inlet pipe 300, so as to form a circulation of the cooling medium between the transformer tank 700 and the cooling device 100, and continuously supply the cooled evaporative cooling liquid into the transformer tank 700.

[0043] The cooling method of the cooling device 100 for the evaporative cooling liquid includes but is not limited to air cooling, liquid cooling or a combination of the two.

[0044] It can be predicted that the gaseous cooling medium formed by phase change of the evaporative cooling liquid will move upward, so in the present application, the gas tank 200 is arranged on the tank cover 720 of the transformer tank 700, and the gas tank 200 and the transformer tank 700 can be integrally formed or detachably connected, as shown in Figure 2 The transformer tank 700 comprises a tank body 710 and a tank cover 720 arranged on the top of the tank body 710, and by arranging the gas tank 200 on the tank cover 720, the gaseous cooling medium can more easily enter the gas tank 200.

[0045] The gas tank 200 and the transformer tank 700 are in communication through one or more gas ports, so that the gas tank 200 and the transformer tank 700 can be integrated together, avoiding the additional pipeline between the gas tank 200 and the transformer tank 700, improving the integration degree of the whole system, and making the overall structure layout more compact. Especially when the above cooling system is applied to a locomotive transformer, the integration of the gas tank 200 and the transformer tank 700 can meet the requirements of the limited installation space of the locomotive.

[0046] The locomotive transformer is a core component of the AC electric locomotive, and its main function is to convert the 25kV high voltage from the overhead line into a voltage suitable for traction motors and other equipment. The working principle of the transformer is the same as that of a general power transformer. The main transformer is installed on the AC electric locomotive to convert the power supply into a voltage suitable for the main circuit and auxiliary circuit. As it is used in a locomotive, it needs to withstand mechanical vibration in the operating environment. Therefore, by arranging the gas tank 200 on the cover 720 of the transformer tank 700 and reducing the connecting pipeline between the two, the position that needs to be sealed can be effectively reduced, thereby avoiding leakage in the mechanical vibration operating environment.

[0047] Of course, the cooling system provided in the present application can also be applied to other transformers, which are not limited herein.

[0048] According to the installation space requirement, the projection of the gas tank 200 on the plane of the top surface of the cover 720 of the transformer tank 700 is preferably completely coincident with the cover 720 of the transformer tank 700, that is, the gas tank 200 adopts a flat structure as a whole, so as to increase the volume of the gas tank 200 without increasing the space as much as possible. Of course, if the installation space is not allowed, the gas tank 200 can be reduced in size or made to adapt to the shape of the installation space, which is not limited herein.

[0049] The condensing device 500 is connected between the gas tank 200 and the transformer outflow pipe 400, and is preferably arranged in the gap between the gas tank 200 and the cooling device 100 to reduce the additional space occupation. The condensing device 500 is used to condense the gaseous cooling medium in the gas tank 200 into liquid cooling medium and send it into the transformer outflow pipe 400.

[0050] In application, the cooling device 100 extracts the high-temperature liquid cooling medium after heat absorption in the transformer tank 700 through the transformer outflow pipe 400, and then sends the low-temperature liquid cooling medium back to the transformer tank 700 through the transformer inflow pipe 300 after cooling. Part of the cooling medium becomes gaseous cooling medium after heat absorption. The gas tank 200 provides expansion space for the cooling medium that changes into gaseous state after absorbing heat from the transformer tank 700. The gaseous cooling medium enters the gas tank 200 to avoid occupying the space of the transformer tank 700, and then enters the condensing device 500 through the gas tank 200. After condensation in the condensing device 500, the gaseous cooling medium becomes liquid cooling medium with a higher temperature and flows back to the transformer outflow pipe 400, and enters the cooling device 100 together with the high-temperature liquid cooling medium that has not changed phase for cooling.

[0051] Compared with the prior art, the cooling system provided in the present application can cool the gaseous cooling medium into liquid cooling medium, so that it participates in the cooling cycle, prevents the internal pressure of the transformer tank 700 from being unbalanced, and ensures the cooling efficiency.

[0052] To improve the pressure bearing performance of the gas tank 200, in an embodiment of the present application, a reinforcing rib structure is arranged in the gas tank 200. Specifically, the reinforcing rib structure includes a plurality of transverse reinforcing ribs 210 and a plurality of longitudinal reinforcing ribs 220. Each transverse reinforcing rib 210 and each longitudinal reinforcing rib 220 intersect each other to form a cross-shaped structure, so as to increase the pressure bearing performance of the gas tank 200 and improve the safety and reliability of the cooling system.

[0053] The two ends of each transverse reinforcing rib 210 and each longitudinal reinforcing rib 220 are connected to the inner wall surface of the gas tank 200.

[0054] To further optimize the above technical solution, the cooling system provided by an embodiment of the present application further includes a pressure detection device. The pressure detection device is used to detect the pressure in the gas tank 200 and control the working state of the cooling device 100 according to the detection value. The working state of the cooling device 100 includes the delivery flow of the cooling medium, the cooling power and the like.

[0055] When the pressure detection device detects that the pressure in the gas tank 200 is higher than a first preset pressure value, it indicates that the temperature in the transformer tank 700 is relatively high, and a large amount of liquid cooling medium is phase changed into gaseous cooling medium. It indicates that the working power of the cooling device 100 is relatively low at this time, and cannot meet the cooling demand of the transformer tank 700. Therefore, it is necessary to increase the working power of the cooling device 100, such as increasing the delivery flow of the cooling medium and / or increasing the cooling power, so as to accelerate the cooling of the cooling medium and reduce the temperature in the transformer tank 700.

[0056] When the pressure detection device detects that the pressure in the gas tank 200 is lower than a second preset pressure value, the second preset pressure value is lower than the first preset pressure value. It indicates that the working power of the cooling device 100 is relatively high at this time, which will cause the energy consumption to rise. At this time, the working power of the cooling device 100 can be reduced, such as reducing the delivery flow of the cooling medium and / or reducing the cooling power, so as to meet the cooling demand of the transformer tank 700 while reducing the energy consumption.

[0057] In addition to the pressure detection device, a temperature detection device can also be arranged to detect the temperature of the liquid cooling medium in the transformer tank 700. When the temperature of the liquid cooling medium is higher than a first preset temperature value, the working power of the cooling device 100 should be increased, such as increasing the delivery flow of the cooling medium and / or increasing the cooling power. When the temperature of the liquid cooling medium is lower than a second preset temperature value, the second preset temperature value is lower than the first preset temperature value, the working power of the cooling device 100 should be reduced, such as reducing the delivery flow of the cooling medium and / or reducing the cooling power, so as to reduce the energy consumption.

[0058] Please refer to Figure 1 and Figure 2In an embodiment of the present application, the condensing device 500 comprises a condensing pipe 510 and a return pipe 520, wherein the condensing pipe 510 is connected to the gas tank 200, and the condensing pipe 510 comprises a pipe body and radiating fins arranged on the pipe body; when the gaseous cooling medium flows into the condensing pipe 510, the gaseous cooling medium exchanges heat with the surrounding air through the radiating fins, so as to be condensed into liquid cooling medium; of course, in order to increase the condensing efficiency, a fan can be arranged on one side of the condensing pipe 510, and the condensing of the gaseous cooling medium is realized through air cooling; of course, the condensing of the gaseous cooling medium can also be realized through liquid cooling, that is, the radiating fins exchange heat with the cooling liquid to condense the gaseous cooling medium.

[0059] Further, referring to Figure 2 , the condensing pipe 510 is in communication with one side of the gas tank 200, so as to avoid occupying the upper space of the gas tank 200, and to fully utilize the gap between the gas tank 200 and the cooling device 100.

[0060] The return pipe 520 is connected between the condensing pipe 510 and the transformer outflow pipe 400, and is used to return the liquid cooling medium condensed to the transformer outflow pipe 400, so that the liquid cooling medium condensed and the liquid cooling medium with high temperature extracted from the transformer tank 700 by the cooling device 100 are combined and then enter the cooling device 100 to be cooled.

[0061] Further, referring to Figure 1 and Figure 2 , in an embodiment of the present application, in order to improve the condensing effect, the condensing device 500 comprises a plurality of condensing pipes 510, each of the condensing pipes 510 is connected in parallel between the return pipe 520 and the gas tank 200, one end of each of the condensing pipes 510 is in communication with the gas tank 200, and the other end is in communication with the return pipe 520; by arranging a plurality of parallel condensing pipes 510, the cooling efficiency of the condensing device 500 on the gaseous cooling medium can be increased, and the pressure in the gas tank 200 can be effectively controlled.

[0062] Further, the above technical solution can be further optimized, that is, an electric control valve can be arranged between each of the condensing pipes 510 or part of the condensing pipes 510 and the gas tank 200, so as to adjust the number of the condensing pipes 510 in communication with the gas tank 200; when the pressure in the gas tank 200 is low, part or all of the electric control valves can be closed; when the pressure in the gas tank 200 is high, part or all of the electric control valves can be opened; in this way, the pressure in the gas tank 200 can be more flexibly controlled.

[0063] Further, referring to Figure 1 and Figure 2In an embodiment of the present application, the return pipe 520, the transformer liquid inlet pipe 300 and the transformer liquid outlet pipe 400 are respectively provided with a control valve 600. The control valve 600 can disconnect the transformer tank 700 from the cooling device 100 for maintenance, and can cut off the connection between the condensing device 500 and the cooling device 100, and can control the flow and flow rate of the cooling medium in the return pipe 520, the transformer liquid inlet pipe 300 and the transformer liquid outlet pipe 400 to maintain the system pressure balance.

[0064] Preferably, the return pipe 520 is a stainless steel flexible pipe. The stainless steel flexible pipe can be bent and deformed, and can compensate for installation deviation and vibration displacement, effectively solving the mechanical stress problem in operation.

[0065] To facilitate the return of the cooling medium, the condensing pipe 510 is located above the transformer liquid outlet pipe 400, and the end of the return pipe 520 connected to the transformer liquid outlet pipe 400 is inclined downward.

[0066] In an embodiment of the present application, the cooling device 100 comprises a circulating pump 110, a heat exchange device 120 and a driving device. The inlet of the circulating pump 110 is communicated with the transformer tank 700 through the transformer liquid outlet pipe 400, and the circulating pump 110 is used to extract liquid cooling medium from the transformer tank 700 through the transformer liquid outlet pipe 400.

[0067] The heat exchange device 120 comprises a cooling medium passage and a heat exchange medium passage. The cooling medium in the cooling medium passage exchanges heat with the heat exchange medium in the heat exchange medium passage. The heat exchange medium can be a liquid heat exchange medium or a gaseous heat exchange medium. The outlet of the circulating pump 110 is communicated with the inlet of the cooling medium passage. The circulating pump 110 sends the liquid cooling medium extracted from the transformer tank 700 into the cooling medium passage, so that the liquid cooling medium exchanges heat with the heat exchange medium to reduce the temperature of the cooling medium.

[0068] The outlet of the cooling medium passage is communicated with the transformer tank 700 through the transformer liquid inlet pipe 300. The cooling medium that exchanges heat with the heat exchange medium in the cooling medium passage and is cooled flows back into the transformer tank 700 through the transformer liquid inlet pipe 300.

[0069] The driving device is used to drive the heat exchange medium to flow in the heat exchange medium passage. When the heat exchange medium is a liquid heat exchange medium, the driving device is a pump. When the heat exchange medium is a gaseous heat exchange medium, the driving device is a fan.

[0070] In an embodiment of the present application, the heat exchange device 120 is an air-cooled heat exchanger, which comprises a winding cooling medium channel and heat exchange fins arranged outside the cooling medium channel, and the driving device is a fan, which drives air flow to flow through the heat exchange fins to exchange heat with the cooling medium in the cooling medium channel.

[0071] Further optimization of the above technical solution, in an embodiment of the present application, the power of the fan and the circulating pump 110 is adjustable, the power of the fan is increased, the rotating speed is increased, the power of the fan is reduced, the rotating speed is reduced, the cooling speed of the cooling medium in the cold region is controlled by adjusting the air volume delivered by the fan, the power of the circulating pump 110 is increased, the delivery flow is increased, the power of the circulating pump 110 is reduced, the delivery flow is reduced, the circulating times of the cooling medium in the transformer tank 700 per unit time is controlled by adjusting the delivery flow of the circulating pump 110, so as to control the cooling speed of the cooling medium.

[0072] Specifically, when it is needed to increase the cooling power of the cooling device 100, the rotating speed of the fan and / or the delivery flow of the circulating pump 110 can be increased, that is, the rotating speed of the fan can be increased alone, or the delivery flow of the circulating pump 110 can be increased alone, or the delivery flow of the circulating pump 110 can be increased while the rotating speed of the fan is increased, when it is needed to reduce the cooling power of the cooling device 100, the rotating speed of the fan and / or the delivery flow of the circulating pump 110 can be reduced, that is, the rotating speed of the fan can be reduced alone, or the delivery flow of the circulating pump 110 can be reduced alone, or the delivery flow of the circulating pump 110 can be reduced while the rotating speed of the fan is reduced.

[0073] Please refer to Figure 1 In an embodiment of the present application, the transformer outflow pipe 400 is arranged above the transformer inflow pipe 300, and the connection positions of the transformer outflow pipe 400 and the transformer tank 700 and the connection positions of the transformer inflow pipe 300 and the transformer tank 700 are respectively located on both sides of the transformer tank 700, it can be foreseen that the cooling medium in the transformer tank 700 will move upward after absorbing heat, therefore, arranging the transformer outflow pipe 400 above the transformer inflow pipe 300 and connecting the transformer outflow pipe 400 and the transformer inflow pipe 300 to the transformer tank 700 respectively on both sides of the transformer tank 700 can ensure that the cooling medium extracted by the cooling device 100 is as much as possible the cooling medium after absorbing heat, so as to improve the cooling efficiency and effect.

[0074] A plurality of outflow communication openings are arranged between the transformer outflow pipe 400 and the transformer tank 700, a plurality of inflow communication openings are arranged between the transformer inflow pipe 300 and the transformer tank 700, each outflow communication opening and each inflow communication opening are arranged in a staggered manner in the vertical direction, and at least one outflow communication opening is arranged towards the winding.

[0075] The application further provides an evaporative cooling transformer, which comprises a transformer box 700 and the cooling system as described in the above embodiment, and the air tank 200 of the cooling system is arranged above the transformer box 700. Since the evaporative cooling transformer adopts the cooling system in the above embodiment, the technical effects of the evaporative cooling transformer are the same as those of the cooling system.

[0076] In the application, the evaporative cooling transformer can be a transformer for a locomotive or a transformer for a power distribution room of a high-rise building.

[0077] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean "only one", but can include a plurality or "one or more" unless the content clearly indicates otherwise. Generally, the terms "comprise" and "include" only indicate that the steps and elements explicitly identified are included, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprise a" does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0078] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0079] It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between each embodiment can be mutually referred to.

[0080] The principles and implementation modes of the present application are described by using specific examples in the present application, and the above embodiment descriptions are only used to help understand the core idea of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A cooling system for evaporative cooling of a transformer, characterized in that: include: A cooling device (100), the cooling device (100) being connected to the transformer box (700) of the evaporative cooling transformer via a transformer liquid inlet pipe (300) and a transformer liquid outlet pipe (400), respectively, to form a cooling medium circulation loop; An air box (200) is arranged on a box cover (720) of the transformer box (700), and the air box (200) is in communication with the transformer box (700); A condensing device (500) is connected between the gas box (200) and the transformer liquid outlet pipe (400), and is used to condense the gaseous cooling medium in the gas box (200) into liquid cooling medium, and send the liquid cooling medium into the transformer liquid outlet pipe (400).

2. The cooling system according to claim 1, characterized in that A reinforcing rib structure is provided in the air box (200).

3. The cooling system according to claim 1, characterized in that It also includes a pressure detection device, which is used to detect the pressure in the air box (200) and control the working state of the cooling device (100) according to the detection value.

4. The cooling system according to any one of claims 1 to 3, characterized in that: The condensing device (500) comprises: A condenser (510) connected to the gas box (200); The return pipe (520) is connected between the condenser pipe (510) and the transformer liquid outlet pipe (400).

5. The cooling system according to claim 4, characterized in that The condensing device (500) comprises a plurality of condensing tubes (510), and each of the condensing tubes (510) is connected in parallel between the return pipe (520) and the air box (200).

6. The cooling system according to claim 4, characterized in that The return pipe (520), the transformer liquid inlet pipe (300), and the transformer liquid outlet pipe (400) are respectively provided with control valves (600).

7. The cooling system according to any one of claims 1 to 3, characterized in that: The cooling device (100) comprises: a circulation pump (110), wherein the inlet of the circulation pump (110) is connected to the transformer box (700) through the transformer liquid outlet pipe (400); a heat exchange device (120), the heat exchange device (120) comprising a cooling medium channel and a heat exchange medium channel, the cooling medium in the cooling medium channel performing heat exchange with the heat exchange medium in the heat exchange medium channel, the outlet of the circulation pump (110) being in communication with the inlet of the cooling medium channel, the outlet of the cooling medium channel being in communication with the transformer box (700) via the transformer liquid inlet pipe (300); A driving device is used to drive the heat exchange medium to flow in the heat exchange medium channel.

8. The cooling system according to claim 7, characterized in that The transformer liquid outlet pipe (400) is arranged above the transformer liquid inlet pipe (300), and the transformer liquid outlet pipe (400) and the transformer liquid inlet pipe (300) are respectively connected to the transformer box (700) on both sides of the transformer box (700).

9. The cooling system according to claim 8, characterized in that The heat exchange device (120) is an air-cooled heat exchanger, and the driving device is a fan.

10. An evaporative cooling transformer, characterized in that: It comprises a transformer box (700) and a cooling system according to any one of claims 1 to 9, wherein an air box (200) of the cooling system is arranged above the transformer box (700).

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