A self-regulating air-cooled heat dissipation system for an european box transformer

Abstract

This invention discloses a self-adjusting fan-type heat dissipation system for European-style prefabricated substations, relating to the field of heat dissipation technology for European-style prefabricated substations. The device includes: a fan-type duct body installed on the top of the European-style prefabricated substation; an annular jacket installed on the outer side of the fan-type duct body; an isolating element installed inside the annular jacket, which divides the inner cavity of the annular jacket into a heat exchange chamber and a lifting chamber from the inside out; a matching inner cylinder slidably inserted into the fan-type duct body; a buoyancy lifting mechanism installed between the inner cylinder and the lifting chamber; a water storage sleeve installed on the outer wall of the fan-type duct body near the bottom; and a water supply and drainage assembly for controlling the liquid level in the lifting chamber installed on the water storage sleeve; a heat-conducting element extending to the inner cylinder installed inside the heat exchange chamber; and a sealing mechanism installed between the inner cylinder and the annular jacket. This invention automatically adjusts the effective height of the fan-type duct through liquid level control and the buoyancy lifting mechanism, ensuring that the heat dissipation intensity matches the equipment's heating conditions in real time, significantly improving heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology for European-style prefabricated substations, and specifically to a self-adjusting exhaust-type heat dissipation system for European-style prefabricated substations. Background Technology

[0002] European-style prefabricated substations (referred to as "European-style box-type substations") are prefabricated substations that compactly integrate high-voltage switchgear, distribution transformers, and low-voltage distribution equipment into a single unit. They offer advantages such as compact structure, small footprint, convenient installation, and strong environmental adaptability, and are widely used in urban power grids, industrial and mining enterprises, commercial centers, and residential communities. Because these substations integrate heat-generating equipment such as transformers, they generate a significant amount of heat during operation. Insufficient heat dissipation can lead to excessively high equipment temperatures, severely impacting insulation performance, accelerating component aging, reducing operating efficiency, and even causing equipment failures, threatening the safe and stable operation of the power grid. Therefore, an efficient and reliable heat dissipation system is one of the key factors ensuring the long-term safe and stable operation of European-style box-type substations.

[0003] Currently, to improve the heat dissipation capacity of European-style prefabricated substations, chimney-effect (or ventilation) technology has been applied to some extent. This technology typically involves installing vertical or angled vents on the top or side of the substation casing. Utilizing the thermal pressure created by the density difference between the hot air inside the substation and the cold air in the external environment, the hot air inside is driven to rise naturally from the bottom or equipment area and exhausted outside the casing through the vents. Simultaneously, cold air from outside enters through the air inlet at the bottom of the casing, forming a continuous natural convection circulation, thereby reducing the internal temperature. This passive cooling method requires no additional power, has a simple structure, and low operating costs, and can effectively enhance the heat dissipation effect of prefabricated substations under certain conditions.

[0004] However, existing exhaust-type cooling systems still have significant drawbacks in practical applications. Their cooling efficiency mainly relies on the chimney effect driven by temperature differences, which in principle requires the exhaust duct to have a certain height to generate sufficient suction. However, in existing designs, the height of the exhaust duct is usually fixed and cannot be adjusted. This fixed structure is difficult to adapt to complex and variable ambient temperatures and the dynamically changing heat load inside the transformer. For example, in summer when the temperature difference between the inside and outside of the transformer is small due to high temperatures or heavy transformer operation, the fixed exhaust duct height may not generate sufficient suction, resulting in a significant decrease in cooling efficiency and failing to meet the cooling requirements under extreme conditions. Conversely, in winter or under light load conditions, the fixed exhaust duct may cause excessive ventilation, leading to excessively low temperatures inside the transformer or the introduction of too much dust and moisture. Summary of the Invention

[0005] This invention provides a self-adjusting fan-type heat dissipation system for European-style prefabricated transformers, which can solve the problems of fixed fan height and inability to automatically adjust according to temperature changes to optimize heat dissipation efficiency in existing fan-type heat dissipation systems.

[0006] The objective of this invention can be achieved through the following technical solutions: A self-regulating exhaust-type cooling system for European-style prefabricated substations includes an exhaust duct body installed on the top of the substation. An annular sleeve is installed on the outer side of the exhaust duct body, and an isolating element is installed inside the annular sleeve. The isolating element divides the inner cavity of the annular sleeve into a heat exchange chamber and a lifting chamber from the inside out. A matching inner cylinder is slidably inserted into the exhaust duct body, and a buoyancy lifting mechanism is installed between the inner cylinder and the lifting chamber. A water storage sleeve is installed on the outer wall of the exhaust duct body near the bottom, and a water supply and drainage assembly for controlling the liquid level in the lifting chamber is installed on the water storage sleeve. A heat-conducting element that extends to the inner cylinder is installed inside the heat exchange chamber. A sealing mechanism is installed between the inner cylinder and the annular sleeve. When the inner cylinder rises and falls along the heat-conducting element, the sealing mechanism ensures that the side wall of the inner cylinder remains sealed at all times.

[0007] As a further embodiment of the present invention: the isolation component includes an annular enclosure and an overflow port. The annular enclosure is fixedly installed in an annular jacket. A plurality of the overflow ports are distributed circumferentially along the side wall of the annular enclosure near the top. The heat exchange chamber and the lifting chamber are connected through the overflow ports.

[0008] As a further embodiment of the present invention: the buoyancy lifting mechanism includes a rainproof component, a rainwater collection component, an annular float, and a sliding rod. The rainproof component is installed at the top of the inner cylinder. The rainwater collection component is disposed between the inner cylinder and the heat exchange chamber and is used to collect rainwater into the heat exchange chamber. The annular float is movably disposed in the lifting chamber. The sliding rod is installed on the top of the annular float and slides through the top of the annular sleeve and is connected to the rainwater collection component. As a further aspect of the present invention: the rainproof component includes a conical cover plate and support rods. The conical cover plate is located directly above the inner cylinder and covers the top opening of the inner cylinder. A plurality of support rods are circumferentially arranged along the top edge of the inner cylinder, and the top of the support rods is connected to the conical cover plate.

[0009] As a further embodiment of the present invention: the rainwater collection device includes a water collection trough, an annular filter plate and a downpipe. The water collection trough is fixedly fitted on the outer side wall of the inner cylinder near the top. The annular filter plate is installed at the opening of the water collection trough, and the cross-section of the annular filter plate gradually increases from top to bottom.

[0010] As a further embodiment of the present invention: the water supply and drainage assembly includes a drain pipe with a solenoid valve, a pump body, and a water supply pipe. The top end of the drain pipe is connected to the bottom of the lifting chamber, and the bottom end of the drain pipe is connected to the top of the water storage jacket. The solenoid valve is installed on the drain pipe. The pump body is located on the top of the water storage jacket, and the input end of the pump body is provided with a water pumping pipe extending into the inner cavity of the water storage jacket. The top end of the water supply pipe is connected to the bottom of the heat exchange chamber, and the bottom end of the water supply pipe is connected to the output end of the pump body.

[0011] As a further aspect of the present invention: the heat-conducting component includes strip-shaped heat-conducting plates and heat-conducting rods. A plurality of strip-shaped heat-conducting plates are circumferentially embedded in the side wall of the blower body, and the side of the strip-shaped heat-conducting plate near the insulating component is located in the heat exchange cavity. A plurality of heat-conducting rods are evenly arranged on the side of the strip-shaped heat-conducting plate away from the heat exchange cavity. The inner cylinder is provided with a through groove along the height direction for the heat-conducting rods to pass through, and the through groove is open at the bottom.

[0012] As a further embodiment of the present invention: the sealing mechanism includes a sealing strip, a guide member and a counterweight ball. The sealing strip is adapted to the through groove, and one end of the sealing strip is fixedly connected to the groove wall near the top of the through groove. The guide member is installed on the top of the annular sleeve, and the movable end of the sealing strip passes through the guide member and is connected to the counterweight ball.

[0013] As a further embodiment of the present invention: the guide member includes a housing, pressure rollers and a guide opening. The housing is installed on the top of the annular jacket, and the bottom of the housing and the end near the inner cylinder are both open. The guide opening is opened at the end of the housing away from the inner cylinder. One end of the sealing strip extends into the housing and passes through the guide opening. A plurality of pressure rollers are rotatably installed inside the housing, and the bottom end of the pressure rollers abuts against the upper surface of the sealing strip located inside the housing.

[0014] As a further aspect of the present invention: the outer wall near the bottom of the water storage sleeve is provided with a plurality of positioning blocks with mounting holes in a circumferential manner.

[0015] The beneficial effects of this invention are: 1. In this invention, an active height adjustment mechanism is formed by setting an inner cylinder that can be slidably inserted into the body of the air duct and connected to the buoyancy lifting mechanism, and cooperating with a water supply and drainage component for controlling the liquid level in the lifting chamber. This mechanism can drive the water supply and drainage component to inject or drain water into the lifting chamber based on the detected internal temperature of the European-style transformer or the airflow velocity signal inside the air duct. This changes the buoyancy acting on the buoyancy lifting mechanism, precisely controlling the extension or retraction of the inner cylinder, thus achieving automatic and on-demand adjustment of the overall height of the air duct. This effectively solves the problem in the prior art where the fixed height of the air duct cannot dynamically adapt to heat dissipation requirements, ensuring the optimal match between heat dissipation intensity and the equipment's heating conditions.

[0016] 2. In this invention, a sealing mechanism is installed between the liftable inner cylinder and the annular jacket to ensure that the sidewall of the inner cylinder remains effectively sealed to the exhaust duct body and the external environment at any position during the lifting process. This design achieves flexible height adjustment while maintaining the structural integrity and airtightness of the exhaust duct as the core channel of the chimney effect. It prevents heat leakage or efficiency loss due to gaps during adjustment and also eliminates the intrusion of external rain, snow, and dust, ensuring long-term, stable, and efficient operation of the system under various adjustment conditions and in complex outdoor environments.

[0017] 3. In this invention, by setting a heat-conducting component with one end located inside the heat exchange cavity and the other end extending into the inner cylinder, a highly efficient heat conduction path is constructed between the liquid working fluid region and the exhaust airflow channel. This allows the heat of the rising hot airflow inside the exhaust duct to be quickly and directly transferred to the liquid working fluid in the heat exchange cavity through the heat-conducting component, significantly increasing the gas-liquid heat exchange area, accelerating the cooling of the hot airflow itself, and thus directly enhancing the core heat dissipation effect. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a first-view perspective perspective view of a self-adjusting fan-type heat dissipation system for European-style transformer substations according to the present invention. Figure 2 This is a second-view perspective perspective view of a self-adjusting fan-type heat dissipation system for European-style transformer substations according to the present invention. Figure 3 This is a first-view sectional view of a self-adjusting fan-type heat dissipation system for European-style transformer substations according to the present invention. Figure 4 yes Figure 3 Enlarged view of section A; Figure 5 This is a cross-sectional view from a second perspective of a self-adjusting fan-type heat dissipation system for European-style transformer substations according to the present invention. Figure 6 This is a perspective view of the connection between the water supply and drainage components and the water storage jacket in a self-adjusting fan-type heat dissipation system for a European-style prefabricated substation according to the present invention. Figure 7 This is a perspective view of the connection between the buoyancy lifting mechanism and the inner cylinder in a self-adjusting fan-type heat dissipation system for European-style prefabricated transformers according to the present invention. Figure 8 This is a cross-sectional view of the connection between the buoyancy lifting mechanism and the inner cylinder in a self-adjusting fan-type heat dissipation system for a European-style prefabricated transformer according to the present invention. Figure 9 This is a perspective view of the connection between the heat-conducting component and the air-dissipating cylinder body in a self-adjusting fan-type heat dissipation system for European-style prefabricated transformers according to the present invention. Figure 10 This is a perspective view of a guide component in a self-adjusting fan-type heat dissipation system for a European-style prefabricated transformer according to the present invention.

[0020] In the diagram: 100, main body of the exhaust duct; 200, annular jacket; 201, heat exchange chamber; 202, lifting chamber; 300, isolation component; 301, annular enclosure; 302, overflow port; 400, inner cylinder; 401, through groove; 500, buoyancy lifting mechanism; 501, rainproof component; 5011, conical cover plate; 5012, support rod; 502, rainwater collection component; 5021, water collection trough; 5022, annular filter plate; 5023, downpipe; 5 03. Annular float; 504. Slide rod; 600. Water storage jacket; 601. Positioning block; 700. Water supply and drainage assembly; 701. Solenoid valve; 702. Drainage pipe; 703. Pump body; 704. Water supply pipe; 800. Heat-conducting component; 801. Strip heat-conducting plate; 802. Heat-conducting rod; 900. Sealing mechanism; 901. Sealing strip; 902. Guide component; 9021. Housing; 9022. Pressure roller; 9023. Guide opening; 903. Counterweight ball. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] like Figures 1-10 As shown, this invention is a self-adjusting exhaust fan-type heat dissipation system for European-style transformer substations, including an exhaust fan body 100 installed on the top of the European-style transformer substation. An annular sleeve 200 is installed on the outer side of the exhaust fan body 100, and an isolating member 300 is installed inside the annular sleeve 200. The isolating member 300 divides the inner cavity of the annular sleeve 200 from the inside out into a heat exchange chamber 201 and a lifting chamber 202. A matching inner cylinder 400 is slidably inserted into the exhaust fan body 100, and the inner cylinder 400 and the lifting chamber 202 are positioned close together. A buoyancy lifting mechanism 500 is installed. A water storage sleeve 600 is installed on the outer side wall of the air duct body 100 near the bottom. A water supply and drainage component 700 for controlling the liquid level of the lifting chamber 202 is installed on the water storage sleeve 600. A heat-conducting component 800 that can extend to the inner cylinder 400 is installed in the heat exchange chamber 201. A sealing mechanism 900 is installed between the inner cylinder 400 and the annular jacket 200. When the inner cylinder 400 rises and falls along the heat-conducting component 800, the sealing mechanism 900 can keep the side wall of the inner cylinder 400 sealed at all times.

[0023] It should be noted that by monitoring the internal temperature of the European-style transformer substation or the airflow velocity within the exhaust duct body 100 (this is existing technology and will not be elaborated upon here), when excessively high temperature or excessively low flow velocity is detected, the water supply and drainage component 700 is activated, pumping water from the water storage jacket 600 into the lifting chamber 202, causing the liquid level to rise. The buoyancy generated by the rising liquid level pushes the annular float 503 in the buoyancy lifting mechanism 500 upward. The annular float 503, through the slide rod 504, drives the inner cylinder 400 to slide upward and extend along the exhaust duct body 100, thereby increasing the effective height of the exhaust duct and enhancing the chimney efficiency. To enhance heat dissipation capacity, the heat-conducting component 800, extending into the inner cylinder 400, directly exchanges heat with the hot airflow and transfers some of the heat to the heat exchange chamber 201. Throughout the entire process of raising and lowering the inner cylinder 400, the sealing mechanism 900 ensures that its sidewalls remain dynamically sealed to the external environment, maintaining the integrity of the airflow. When the heat dissipation demand decreases, the water supply and drainage component 700 drains the water in the lifting chamber 202 back into the water storage jacket 600, causing the liquid level to drop. The inner cylinder 400 then falls back under gravity, achieving a reduction in the airflow height and automatic system reset.

[0024] like Figures 2-3 and Figure 7 As shown, the buoyancy lifting mechanism 500 includes a rainproof component 501, a rainwater collection component 502, an annular float 503, and a sliding rod 504. The rainproof component 501 is installed at the top of the inner cylinder 400. The rainwater collection component 502 is disposed between the inner cylinder 400 and the heat exchange chamber 201, and the rainwater collection component 502 is used to collect rainwater into the heat exchange chamber 201. The annular float 503 is movably disposed in the lifting chamber 202. The sliding rod 504 is installed on the top of the annular float 503, and the sliding rod 504 slides through the top of the annular jacket 200 and is connected to the rainwater collection component 502.

[0025] It should be noted that the rainproof component 501 effectively prevents rainwater from directly entering the air extraction channel, while the rainwater collection component 502 collects rainwater from the environment and guides it into the heat exchange chamber 201 through connecting pipes. When the water supply and drainage component 700 injects water into the system, the water overflows from the heat exchange chamber 201 into the lifting chamber 202. The buoyancy generated by the rise in water level acts on the annular float 503, driving the annular float 503 to move upward. The annular float 503, through the slide rod 504 fixedly connected to its top, drives the rainwater collection component 502 to rise, causing the inner cylinder 400 to slide upward synchronously along the air extraction duct body 100, thereby achieving automatic extension of the air extraction duct height. Conversely, when draining water, the water level in the lifting chamber 202 drops, causing the inner cylinder 400 to contract and reset.

[0026] like Figure 3 and Figure 5As shown, the isolation member 300 includes an annular enclosure 301 and an overflow port 302. The annular enclosure 301 is fixedly installed inside the annular jacket 200. Multiple overflow ports 302 are distributed circumferentially along the side wall of the annular enclosure 301 near the top. The heat exchange chamber 201 and the lifting chamber 202 are connected through the overflow ports 302.

[0027] It should be noted that after rainwater enters the heat exchange chamber 201 through the rainwater collection component 502, if the liquid level exceeds the height of the overflow port 302 on the annular enclosure 301, the excess rainwater will overflow evenly into the lifting chamber 202 through the overflow port 302, and finally be discharged into the water storage jacket 600 for storage and backup through the drain pipe 702 in the water supply and drainage component 700, thus realizing the recycling of water resources. When the system needs to adjust the ventilator height, the water supply and drainage component 700 is activated and pumps the water in the water storage jacket 600 into the bottom of the heat exchange chamber 201. At this time, the water first enters the heat exchange chamber. The water level rises within the heat exchange chamber 201, ensuring that the heat-conducting component 800 is fully submerged to maintain basic heat dissipation efficiency. Only after the liquid level reaches the height of the overflow port 302 does the water begin to overflow steadily into the lifting chamber 202, driving the buoyancy lifting mechanism 500 to move and causing the inner cylinder 400 to rise and fall. This process, through the limiting effect of the overflow port 302, always prioritizes maintaining a sufficient liquid level in the heat exchange chamber 201 that is not lower than the height of the overflow port 302, fundamentally avoiding the problem of water shortage in the heat exchange chamber 201 caused by adjustment operations, and ensuring the stability and reliability of the heat dissipation effect.

[0028] like Figure 5 and Figure 7 As shown, the rainproof component 501 includes a conical cover plate 5011 and support rods 5012. The conical cover plate 5011 is located directly above the inner cylinder 400 and covers the top opening of the inner cylinder 400. Multiple support rods 5012 are circumferentially arranged along the top edge of the inner cylinder 400, and the top of the support rods 5012 is connected to the conical cover plate 5011.

[0029] It should be noted that the conical cover plate 5011 covers the top opening of the inner cylinder 400, directing any rainwater that may fall in to the surrounding area. Multiple support rods 5012 are circumferentially connected between the top of the inner cylinder 400 and the conical cover plate 5011, which reliably fixes the position of the conical cover plate 5011 while providing an exhaust channel for hot airflow at their intervals.

[0030] like Figure 5 and Figure 8 As shown, the rainwater collection device 502 includes a water collection trough 5021, an annular filter plate 5022, and a downpipe 5023. The water collection trough 5021 is fixedly fitted on the outer side wall of the inner cylinder 400 near the top. The annular filter plate 5022 is installed at the opening of the water collection trough 5021, and the cross-section of the annular filter plate 5022 gradually increases from top to bottom.

[0031] It should be noted that the rainwater guided down by the rainproof component 501 falls into the water collection tank 5021 and is filtered by the annular filter plate 5022 installed at the opening of the tank. The inclined cross-section design of the annular filter plate 5022 allows the rainwater flowing down to wash its surface, achieving automatic cleaning and preventing impurities from remaining. The filtered clean rainwater is then introduced into the heat exchange chamber 201 below through the drain pipe 5023.

[0032] like Figure 1 , Figure 3 and Figure 6 As shown, the water supply and drainage assembly 700 includes a drain pipe 702 with a solenoid valve 701, a pump body 703, and a water supply pipe 704. The top end of the drain pipe 702 is connected to the bottom of the lifting chamber 202, and the bottom end of the drain pipe 702 is connected to the top of the water storage sleeve 600. The solenoid valve 701 is installed on the drain pipe 702. The pump body 703 is located on the top of the water storage sleeve 600, and the input end of the pump body 703 is provided with a water pumping pipe extending into the inner cavity of the water storage sleeve 600. The top end of the water supply pipe 704 is connected to the bottom of the heat exchange chamber 201, and the bottom end of the water supply pipe 704 is connected to the output end of the pump body 703.

[0033] It should be noted that when the air extraction height needs to be increased, the pump body 703 starts, pumping water from the water storage jacket 600 into the water supply pipe 704 and injecting it into the bottom of the heat exchange chamber 201. The water rises in the heat exchange chamber 201 and enters the lifting chamber 202 through the overflow port 302, causing the annular float 503 to float up and thus raising the inner cylinder 400. When the air extraction height needs to be decreased, the solenoid valve 701 opens, and the water in the lifting chamber 202 flows back to the water storage jacket 600 through the drain pipe 702 under the action of gravity. The liquid level drops, causing the inner cylinder 400 to fall back. This component realizes the controlled circulation of water between the water storage jacket 600, the heat exchange chamber 201, and the lifting chamber 202, thereby completing the active and bidirectional adjustment of the air extraction height.

[0034] like Figure 5 and Figures 8-9 As shown, the heat-conducting component 800 includes a strip-shaped heat-conducting plate 801 and heat-conducting rods 802. Several strip-shaped heat-conducting plates 801 are circumferentially embedded in the side wall of the air blower body 100, and the side of the strip-shaped heat-conducting plate 801 near the isolation component 300 is located in the heat exchange cavity 201. Several heat-conducting rods 802 are evenly arranged on the side of the strip-shaped heat-conducting plate 801 away from the heat exchange cavity 201. The inner cylinder 400 has a through groove 401 along the height direction for the heat-conducting rods 802 to pass through, and the through groove 401 is open at the bottom.

[0035] It should be noted that the strip-shaped heat-conducting plate 801 is embedded in the side wall of the air-blowing duct body 100, with one side immersed in the liquid in the heat exchange chamber 201 and the other side connected to several heat-conducting rods 802 extending into the air-blowing channel. When hot air flows through the inner cylinder 400, the heat is rapidly absorbed through the heat-conducting rods 802 and conducted to the liquid in the heat exchange chamber 201 via the strip-shaped heat-conducting plate 801, thereby achieving efficient cooling of the airflow. At the same time, during the lifting and lowering process of the inner cylinder 400, the through groove 401 opened on its side wall allows the heat-conducting rods 802 to pass through stably relative to the through groove 401 without affecting the normal lifting and lowering of the inner cylinder 400.

[0036] like Figures 2-3 As shown, the sealing mechanism 900 includes a sealing strip 901, a guide member 902, and a counterweight ball 903. The sealing strip 901 is adapted to the through groove 401, and one end of the sealing strip 901 is fixedly connected to the groove wall of the through groove 401 near the top. The guide member 902 is installed on the top of the annular sleeve 200, and the movable end of the sealing strip 901 passes through the guide member 902 and is connected to the counterweight ball 903.

[0037] It should be noted that when the inner cylinder 400 rises, the through groove 401 on one side moves upward along the heat-conducting rod 802. Simultaneously, the movable end of the sealing strip 901, which is fixed to the top of the through groove 401 and has a certain degree of hardness, is pulled upward. When the sealing strip 901 passes through the guide member 902 fixed to the top of the annular jacket 200, it is squeezed by the guide member 902. Its own hardness allows it to deform in the direction of the squeeze, thus adaptively and tightly locking into the through groove 401 exposed after the rise, achieving automatic sealing of the part of the through groove 401 located above the annular jacket 200. When the inner cylinder 400 descends, the sealing strip 901, guided by the guide member 902 and under the combined action of its own hardness, can automatically detach from the through groove 401 and pass downward through the guide member 902, causing the part of the through groove 401 located within the annular jacket 200 to reopen for the heat-conducting rod 802 to pass through. Through this design, during the entire process of raising and lowering the inner cylinder 400, the sealing strip 901, with the cooperation of the guide 902, can always dynamically close or open the through slot 401, thereby achieving flexible height adjustment while reliably maintaining the structural integrity and airtightness of the exhaust duct as the core channel of the chimney effect.

[0038] like Figures 3-4 and Figure 10As shown, the guide member 902 includes a housing 9021, pressure rollers 9022, and a guide opening 9023. The housing 9021 is installed on the top of the annular jacket 200, and the bottom of the housing 9021 and the end near the inner cylinder 400 are open. The guide opening 9023 is opened at the end of the housing 9021 away from the inner cylinder 400. One end of the sealing strip 901 extends into the housing 9021 and passes through the guide opening 9023. Multiple pressure rollers 9022 are rotatably installed inside the housing 9021, and the bottom end of the pressure roller 9022 abuts against the upper surface of the sealing strip 901 located inside the housing 9021.

[0039] It should be noted that when the inner cylinder 400 is raised or lowered, the sealing strip 901 moves accordingly. The part of it that passes through the inside of the housing 9021 rolls into contact with the bottom of multiple pressure rollers 9022. The rotation of the pressure rollers 9022 effectively reduces frictional resistance. During the process of the sealing strip 901 being pulled or retracted, the pressure rollers 9022 apply controllable contact pressure to its upper surface. This pressure, together with the hardness of the sealing strip 901 itself, ensures that the sealing strip 901 can produce the required guiding deformation when it passes through the housing 9021 and extends or retracts through the guide port 9023. This allows for precise adaptation to the sealing or opening action of the through groove 401, achieving stable constraint and attitude control of the movement path of the sealing strip 901.

[0040] like Figures 1-2 As shown, the water storage sleeve 600 has multiple positioning blocks 601 with mounting holes on the outer side wall near the bottom.

[0041] It should be noted that by using bolts or other fasteners to pass through the mounting holes on the positioning block 601, the water storage sleeve 600 can be stably and securely installed at the predetermined position on the top of the European-style transformer substation.

[0042] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A self-adjusting ventilation type heat dissipation system for a European box transformer, comprising a ventilation cylinder body (100) installed on the top of the European box transformer, characterized in that, An annular sleeve (200) is installed on the outer side of the air-blowing duct body (100). An isolation member (300) is installed inside the annular sleeve (200), and the isolation member (300) divides the inner cavity of the annular sleeve (200) from the inside to the outside into a heat exchange chamber (201) and a lifting chamber (202). A matching inner cylinder (400) is slidably inserted into the air-blowing duct body (100), and a buoyancy lifting mechanism (500) is installed between the inner cylinder (400) and the lifting chamber (202). The air-blowing duct body (100) is supported by... A water storage sleeve (600) is installed on the outer wall near the bottom, and a water supply and drainage assembly (700) for controlling the liquid level of the lifting chamber (202) is installed on the water storage sleeve (600). A heat-conducting element (800) that can extend to the inner cylinder (400) is installed in the heat exchange chamber (201). A sealing mechanism (900) is installed between the inner cylinder (400) and the annular jacket (200). When the inner cylinder (400) rises and falls along the heat-conducting element (800), the sealing mechanism (900) can keep the side wall of the inner cylinder (400) sealed at all times.

2. A self-regulating air-blast heat dissipating system for an EU-type box transformer according to claim 1, characterized in that, The isolation element (300) includes an annular enclosure (301) and an overflow port (302). The annular enclosure (301) is fixedly installed inside the annular jacket (200). A plurality of the overflow ports (302) are distributed circumferentially along the side wall near the top of the annular enclosure (301). The heat exchange chamber (201) and the lifting chamber (202) are connected through the overflow ports (302).

3. A self-regulating air-blast heat sink system for use in an on-land box transformer according to claim 1, characterized in that, The buoyancy lifting mechanism (500) includes a rainproof component (501), a rainwater collection component (502), an annular float (503), and a sliding rod (504). The rainproof component (501) is installed at the top of the inner cylinder (400). The rainwater collection component (502) is disposed between the inner cylinder (400) and the heat exchange chamber (201) and is used to collect rainwater into the heat exchange chamber (201). The annular float (503) is movably disposed in the lifting chamber (202). The sliding rod (504) is installed on the top of the annular float (503) and slides through the top of the annular sleeve (200) and is connected to the rainwater collection component (502).

4. A self-regulating air-blast heat sink system for use in an on-land box transformer according to claim 3, characterized in that, The rainproof component (501) includes a conical cover plate (5011) and support rods (5012). The conical cover plate (5011) is located directly above the inner cylinder (400) and covers the top opening of the inner cylinder (400). A plurality of support rods (5012) are circumferentially arranged along the top edge of the inner cylinder (400), and the top of the support rods (5012) is connected to the conical cover plate (5011).

5. A self-adjusting exhaust-type heat dissipation system for European-style prefabricated substations according to claim 3, characterized in that, The rainwater collection component (502) includes a water collection trough (5021), an annular filter plate (5022), and a downpipe (5023). The water collection trough (5021) is fixedly fitted on the outer side wall of the inner cylinder (400) near the top. The annular filter plate (5022) is installed at the opening of the water collection trough (5021), and the cross-section of the annular filter plate (5022) gradually increases from top to bottom.

6. A self-regulating air-blast heat sink system for use in an on-land box transformer according to claim 1, characterized in that, The water supply and drainage assembly (700) includes a drain pipe (702) with a solenoid valve (701), a pump body (703), and a water supply pipe (704). The top end of the drain pipe (702) is connected to the bottom of the lifting chamber (202), and the bottom end of the drain pipe (702) is connected to the top of the water storage sleeve (600). The solenoid valve (701) is installed on the drain pipe (702). The pump body (703) is located on the top of the water storage sleeve (600), and the input end of the pump body (703) is provided with a water pumping pipe extending into the inner cavity of the water storage sleeve (600). The top end of the water supply pipe (704) is connected to the bottom of the heat exchange chamber (201), and the bottom end of the water supply pipe (704) is connected to the output end of the pump body (703).

7. A self-regulating air-blast heat sink system for use in an on-land box transformer according to claim 1, characterized in that, The heat-conducting component (800) includes a strip heat-conducting plate (801) and heat-conducting rods (802). Several strip heat-conducting plates (801) are circumferentially embedded in the side wall of the blower body (100), and the side of the strip heat-conducting plate (801) near the isolation component (300) is located in the heat exchange cavity (201). Several heat-conducting rods (802) are evenly arranged on the side of the strip heat-conducting plate (801) away from the heat exchange cavity (201). The inner cylinder (400) has a through groove (401) along the height direction for the heat-conducting rods (802) to pass through, and the through groove (401) is open at the bottom.

8. A self-regulating air-blast heat dissipating system for an EU box transformer according to claim 7, characterized in that, The sealing mechanism (900) includes a sealing strip (901), a guide (902), and a counterweight ball (903). The sealing strip (901) is adapted to the through groove (401), and one end of the sealing strip (901) is fixedly connected to the groove wall near the top of the through groove (401). The guide (902) is installed on the top of the annular sleeve (200), and the movable end of the sealing strip (901) passes through the guide (902) and is connected to the counterweight ball (903).

9. A self-regulating air-blast heat sink system for use in an on-land box transformer according to claim 8, characterized in that, The guide member (902) includes a housing (9021), pressure rollers (9022), and a guide opening (9023). The housing (9021) is installed on the top of the annular jacket (200), and the bottom of the housing (9021) and the end near the inner cylinder (400) are open. The guide opening (9023) is opened at the end of the housing (9021) away from the inner cylinder (400). One end of the sealing strip (901) extends into the housing (9021) and passes through the guide opening (9023). A plurality of pressure rollers (9022) are rotatably installed inside the housing (9021), and the bottom end of the pressure roller (9022) abuts against the upper surface of the sealing strip (901) located inside the housing (9021).

10. A self-regulating air-blast heat sink system for use in an EU box transformer according to claim 1, characterized in that, The water storage sleeve (600) has multiple positioning blocks (601) with mounting holes on the outer wall near the bottom.

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