Transformer cooling spray head and system

Abstract

The application discloses a transformer cooling spray head, the nozzle part of the spray head is bent to make the nozzle mouth face the left side or the right side, so that the cooling liquid is prevented from being directly sprayed to the ground, resource waste is avoided, the covering area of the cooling liquid on the transformer cooling fin is improved, and the cooling efficiency is improved; and the horn-shaped opening improves the spraying efficiency and the covering area. The application discloses a transformer cooling system, the controller in the system takes the equal amount of heat dissipation of the transformer cooling fin and the absorbed heat of the cooling liquid as the basis, calculates the spraying mass of the cooling liquid, and outputs the corresponding mass of the cooling liquid and the corresponding volume of the compressed air through the control of the cooling liquid cooling device and the compressed air transmission device, so that the atomized cooling liquid completely evaporates after absorbing the heat dissipation of the transformer cooling fin, waste water is prevented, and the purpose of saving cost and resources is achieved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a transformer cooling spray head and system. Background Technology

[0002] With the continuous development of power systems and the increase in load demand, the operational efficiency and safety of transformers, as key power equipment, are becoming increasingly important. Transformers generate a large amount of heat during operation; if not cooled effectively and promptly, this can lead to overheating, affecting their performance and lifespan. Therefore, developing efficient cooling technologies has become crucial to ensuring the stable operation of transformers.

[0003] Currently, water cooling has a good cooling effect, but the disadvantage of this cooling method is that it uses a lot of water, which leads to waste of resources and generates a lot of wastewater.

[0004] Because the gap between the transformer heat sink fins is only 4.5 cm, the space is relatively narrow. The existing spray heads are all designed vertically and cannot be installed at an angle within the gap between the transformer heat sink fins. Normal vertical placement would cause the coolant to spray directly onto the ground, resulting in a waste of resources. At the same time, the cooling effect is also limited. Summary of the Invention

[0005] The purpose of this invention is to provide a transformer cooling spray head and system that can prevent coolant from being sprayed directly onto the ground, thus reducing resource waste and environmental impact, while ensuring that the coolant can evaporate quickly under the heat dissipation of the transformer, thereby minimizing wastewater generation.

[0006] The key feature of the transformer cooling spray head is that it includes a nozzle section, which is curved, and the nozzle section is provided with a curved compressed air passage and a coolant passage. The main axis of the compressed air passage coincides with the main axis of the nozzle section, and the compressed air passage is surrounded by the coolant passage.

[0007] The nozzle section has a constricted opening in the middle and a nozzle opening at the end. A flared opening is formed between the constricted opening and the nozzle opening.

[0008] The coolant outlet of the coolant channel is located on the waistline of the constricted opening, and the air outlet of the compressed air channel is located inside the waistline of the constricted opening.

[0009] The compressed air vibrates after the coolant is filtered, generating mist that atomizes the coolant. At the same time, the nozzle is bent so that the nozzle orifice faces to the left or right, thus preventing the coolant from being sprayed directly onto the ground, preventing resource waste, and increasing the coverage area of ​​the coolant on the transformer heat sink, thereby improving cooling efficiency.

[0010] The opening formed between the tapered end and the nozzle is funnel-shaped, which improves spray efficiency and coverage area.

[0011] Furthermore, the compressed air channel has a structure that is larger at the top and smaller at the bottom. The larger end of the compressed air channel is the air inlet and is connected to the outside, while the smaller end of the compressed air channel is the air outlet and is connected to the waist opening.

[0012] The air inlet of the compressed air channel is connected to the compressed air intake channel, which is open to the outside and far away from the waist opening.

[0013] Furthermore, the coolant channel has a structure that is wider at the top and narrower at the bottom. The wider end of the coolant channel is the inlet and is connected to the outside, while the narrower end is the outlet and is connected to the constricted opening.

[0014] The inlet of the coolant channel is connected to the coolant inlet channel, which is open to the outside and located away from the waist opening.

[0015] The end of the nozzle portion away from the nozzle opening is connected to the connecting portion. The compressed air inlet channel and the coolant inlet channel are located inside the connecting portion. The coolant inlet channel surrounds the compressed air inlet channel. The main axis of the compressed air inlet channel coincides with the main axis of the connecting portion.

[0016] Compressed air inlet channels and coolant inlet channels can reduce the resistance to coolant flow, which helps to improve the efficiency and uniformity of spraying. The curved surfaces of the compressed air channels and coolant channels help to adjust the angle and direction of the spray, promote the atomization process, and make the liquid form finer water droplets when sprayed, thus improving the fineness and coverage area of ​​the spray.

[0017] Furthermore, the diameter of the air inlet of the compressed air channel is twice the diameter of the air outlet.

[0018] Furthermore, the angle between the sidewall of the opening and the central axis of the opening is α, where 20°≤α≤40°.

[0019] Furthermore, a filter screen is provided at the nozzle opening.

[0020] A transformer cooling system includes a transformer, on which at least one transformer heat sink is provided. All transformer heat sinks are arranged at equal intervals from left to right. The key feature is that spray devices are arranged at intervals between the transformer heat sinks. Each spray device is provided with n*n spray heads as described in claims 1 to 6. The spray device is connected to a coolant cooling device and a compressed air transmission device.

[0021] A temperature measuring instrument is installed on the transformer heat sink. The temperature measuring instrument measures the surface temperature of the transformer heat sink and sends the surface temperature of the transformer heat sink to the controller. The controller controls the coolant cooling device and the compressed air transmission device to output the corresponding mass of coolant and the corresponding volume of compressed air according to the surface temperature of the transformer heat sink.

[0022] The formula for calculating the mass of the coolant is:

[0023]

[0024] Among them, Q 放 denoted as , where is the heat dissipation of the transformer heat sink, c is the specific heat capacity of the coolant, ΔT is the temperature difference of the coolant from its initial temperature to its boiling point, and r is the heat of vaporization of the coolant.

[0025] The heat dissipation Q of the transformer heat sink 放 The calculation formula is:

[0026] Q 放 =k×S×T 散

[0027] Where k is the heat dissipation coefficient, S is the surface area of ​​the heat sink, and T 散 This refers to the surface temperature of the transformer's heat sink.

[0028] The controller calculates the mass of coolant sprayed out based on the principle that the heat dissipation of the transformer heat sink is equal to the heat absorbed by the coolant. It then controls the coolant cooling device and the compressed air transmission device to output the corresponding mass of coolant and the corresponding volume of compressed air. This ensures that the atomized coolant absorbs the heat dissipation of the transformer heat sink and evaporates completely, thereby preventing wastewater generation and achieving the goal of saving costs and resources.

[0029] Furthermore, the coolant cooling device includes a water storage tank, which contains a semiconductor cooling chip. The water storage tank has an electric inlet valve at its inlet and an outlet connected to the inlet of a booster pump. The outlet of the booster pump is connected to one end of a delivery pipe, and the other end of the delivery pipe is connected to at least one delivery branch pipe, which is connected to the spray device in a corresponding manner.

[0030] The liquid delivery pipe is equipped with an electric liquid outlet valve;

[0031] The controller controls the inlet electric valve and the outlet electric valve.

[0032] Semiconductor cooling chips cool the coolant in the water tank, greatly increasing the heat absorption of the coolant, thereby rapidly cooling the transformer, improving the transformer's cooling efficiency, and reducing the amount of coolant used.

[0033] The controller adjusts the flow rate of the sprayed coolant by controlling the electric valve at the outlet, thereby ensuring that the coolant evaporates quickly while cooling the transformer heat sink, thus minimizing wastewater generation.

[0034] Furthermore, the compressed air transmission device includes an air filter, the air inlet of which is connected to the outside, an air inlet electric valve is provided at the air inlet of the air filter, the air outlet of the air filter is connected to one end of an air supply pipe, and the other end of the air supply pipe is connected to at least one air supply branch pipe, and the air supply branch pipe is connected to the spray device one by one.

[0035] An electric air supply valve is installed on the air supply branch pipe;

[0036] The controller controls the intake electric valve and the supply electric valve.

[0037] The controller can supply compressed air with sufficient pressure to all spray head arrays by controlling the intake electric valve, thereby ensuring the atomization effect of the coolant. At the same time, it can also control the compressed air to be sprayed out by individual spray head arrays by controlling the air delivery electric valve, thereby cleaning the transformer heat sink and preventing dust accumulation.

[0038] Furthermore, the number of spray heads is greatest near the middle of the transformer, and gradually decreases as they move away from the middle of the transformer;

[0039] Within the spraying device, the spray heads are arranged alternately with the nozzles facing left and right.

[0040] The coolant inlet channel of the spray head is connected to the coolant branch pipe through the coolant delivery end pipe; the compressed air inlet channel of the spray head is connected to the compressed air branch pipe through the compressed air delivery end pipe.

[0041] The spray nozzles are arranged in a dense distribution in the middle and gradually become sparser on both sides. This allows for targeted cooling based on the temperature distribution of the transformer heat sink, thus preventing poor cooling in the middle of the heat sink or incomplete evaporation of coolant at both ends, which would otherwise lead to coolant waste.

[0042] The spray heads are arranged in a crisscross pattern inside the spray device with the nozzles pointing to the left and right, which can uniformly cool the heat sinks on both sides of the spray device, thereby improving the cooling efficiency.

[0043] Beneficial effects: 1. The curved nozzle of the transformer cooling spray head faces the left or right, thus avoiding direct spraying of coolant onto the ground, preventing resource waste, and increasing the coverage area of ​​the coolant on the transformer heat sink, thereby improving cooling efficiency; at the same time, the opening formed between the inward waist opening and the nozzle opening of the transformer cooling spray head is flared, which can improve spraying efficiency and coverage area.

[0044] 2. The controller in the transformer cooling system calculates the mass of coolant sprayed out based on the principle that the heat dissipation of the transformer heat sink is equal to the heat absorbed by the coolant. It then controls the coolant cooling device and the compressed air transmission device to output the corresponding mass of coolant and the corresponding volume of compressed air. This ensures that the atomized coolant absorbs the heat dissipation of the transformer heat sink and evaporates completely, thereby preventing wastewater generation and achieving the goals of saving costs, resources, and reducing environmental pollution. Attached Figure Description

[0045] Figure 1 This is a cross-sectional view of a transformer cooling spray head.

[0046] Figure 2 Top view of the transformer cooling spray head;

[0047] Figure 3 Dimensions of the transformer cooling spray head;

[0048] Figure 4 This is a schematic diagram of a transformer cooling system.

[0049] Figure 5 Schematic diagram of spray head arrangement;

[0050] Figure 6 This is a schematic diagram of a compressed air transmission device. Detailed Implementation

[0051] The specific embodiments and working principles of the present invention will be further described in detail below with reference to the accompanying drawings.

[0052] like Figure 1 , Figure 2 As shown, a transformer cooling spray head includes a nozzle portion, which is curved, and a curved compressed air passage 13b and a coolant passage 16b are provided inside the nozzle portion. The coolant passage 16b is an annular pipe and surrounds the compressed air passage 13b.

[0053] The main axis of the compressed air passage 13b coincides with the main axis of the nozzle section;

[0054] The nozzle part has a waist-narrowing opening 17 in the middle section, and the nozzle part has a nozzle opening 18 at the end. The end of the nozzle part away from the nozzle opening 18 is connected to the connecting part.

[0055] The waist opening 17 and the nozzle opening 18 form a trumpet-shaped opening, and the angle between the side wall of the opening and the central axis of the opening is α, where 20°≤α≤40°.

[0056] The nozzle 18 is equipped with a filter screen.

[0057] like Figure 1 As shown, the connecting part is provided with a compressed air inlet channel 13a and a coolant inlet channel 16a. The coolant inlet channel 16a is a ring-shaped pipe and surrounds the compressed air inlet channel 13a. The main axis of the compressed air inlet channel 13a coincides with the main axis of the connecting part.

[0058] like Figure 1 As shown, the compressed air channel 13b has a structure that is larger at the top and smaller at the bottom. The larger end of the compressed air channel 13b is the air inlet, which is connected to the outside through the compressed air intake channel 13a. The smaller end of the compressed air channel 13b is the air outlet and is connected to the waist opening 17.

[0059] The coolant channel 16b has a structure that is larger at the top and smaller at the bottom. The larger end of the coolant channel 16b is the inlet, which is connected to the outside via the coolant inlet channel 16a. The smaller end of the coolant channel 16b is the outlet and is connected to the constricted opening 17.

[0060] like Figure 1 As shown, the diameter of the air inlet of the compressed air channel 13b is twice the diameter of the air outlet.

[0061] like Figure 3 As shown, the specific dimensions of the transformer cooling spray head are:

[0062] The compressed air passage 13b has an inlet diameter of 0.5cm, an outlet diameter of 0.25cm, an inner diameter of 2.6cm, and an outer diameter of 3cm.

[0063] The diameter of the compressed air intake channel 13a is 0.5cm, and the length of the compressed air intake channel 13a is 1.5cm.

[0064] The inner diameter of coolant passage 16b is 6cm, and the outer diameter of coolant passage 16b is 8cm;

[0065] The maximum diameter of the coolant inlet channel 16a is 1 cm, the inner diameter of the coolant inlet channel 16a is 6 cm, and the outer diameter of the coolant inlet channel 16a is 8 cm.

[0066] The angle α between the sidewall of the opening and the central axis of the opening is either 20°, 25°, 30°, 35°, or 40°.

[0067] like Figure 4As shown, a transformer cooling system includes a transformer, on which at least one transformer heat sink 8 is provided. All transformer heat sinks 8 are arranged at equal intervals from left to right. Spraying devices 10 are arranged at intervals between the transformer heat sinks 8 and the spraying devices 10 are provided with n*n transformer cooling spray heads.

[0068] like Figure 5 As shown, the distance between the transformer heat sinks 8 and the transformer heat sink 8 is 4.5cm, and the nozzles 18 of the transformer cooling spray heads in each group of spray devices 10 are arranged alternately facing left and right. Figure 5 Green indicates that the nozzle 18 of the transformer cooling spray head faces to the left, and orange indicates that the nozzle 18 of the transformer cooling spray head faces to the right.

[0069] Meanwhile, since the heat dissipation performance of the central area of ​​the transformer heat sink 8 is relatively weak, the number of transformer cooling spray heads in the spray device 10 near the middle of the transformer is the largest, and the number of transformer cooling spray heads in the spray device 10 further away from the middle of the transformer gradually decreases; for example, the number of transformer cooling spray heads in the seven sets of spray devices 10 arranged from left to right is 3*3, 4*4, 5*5, 6*6, 5*5, 4*4, and 3*3 respectively.

[0070] like Figure 4 As shown, the transformer cooling system is also equipped with a coolant cooling device and a compressed air transmission device 19.

[0071] like Figure 4 As shown, the coolant cooling device is equipped with a water storage tank 3, which contains a semiconductor cooling chip 4. The water storage tank 3 has an inlet electric valve 2 at its inlet and an outlet connected to the inlet of a booster pump 6. The outlet of the booster pump 6 is connected to one end of a delivery pipe 5, and the other end of the delivery pipe 5 is connected to at least one delivery branch pipe. The delivery branch pipe is connected to the spray device 10 in a one-to-one correspondence.

[0072] The liquid delivery pipe 5 is equipped with a liquid discharge electric valve 7;

[0073] like Figure 4 , Figure 6 As shown, the compressed air transmission device 19 includes an air filter 15, the air inlet of which is connected to the outside, and an air inlet electric valve 14 is provided at the air inlet of the air filter 15. The air outlet of the air filter 15 is connected to one end of the air supply pipe 21, and the other end of the air supply pipe 21 is connected to at least one air supply branch pipe, which is connected to the spray device 10 in a corresponding manner.

[0074] An electric air supply valve 9 is installed on the air supply branch pipe.

[0075] like Figure 6 As shown, the coolant inlet channel 16a of all transformer cooling spray heads in each group of spray devices 10 is connected to the corresponding coolant delivery branch pipe through the end pipe of the delivery pipe.

[0076] In each spray device 10, the compressed air intake channel 13a of all transformer cooling spray heads is connected to the corresponding air supply branch pipe through the air supply terminal pipe.

[0077] like Figure 4 As shown, a thermometer 11 is installed on the transformer heat sink 8. The thermometer 11 measures the surface temperature of the transformer heat sink 8 and sends the surface temperature of the transformer heat sink 8 to the controller 12. The controller 12 controls the liquid inlet electric valve 2, the liquid outlet electric valve 7, the air inlet electric valve 14, and the air delivery electric valve 9 to output a corresponding mass of coolant and a corresponding volume of compressed air to the transformer cooling spray head, so that the transformer cooling spray head sprays atomized coolant to cool the transformer heat sink 8, thereby reducing the transformer temperature.

[0078] The formula for calculating the mass of the coolant is:

[0079]

[0080] Among them, Q 放 denoted as , where is the heat dissipation of transformer heat sink 8, c is the specific heat capacity of the coolant, ΔT is the temperature difference of the coolant from its initial temperature to its boiling point, and r is the heat of vaporization of the coolant.

[0081] The heat dissipation Q of the transformer heat sink 8 放 The calculation formula is:

[0082] Q 放 =k×S×T 散

[0083] Where k is the heat dissipation coefficient, S is the surface area of ​​the heat sink, and T 散 This refers to the surface temperature of the transformer heat sink 8.

Claims

1. A transformer cooling spray head, characterized in that, The device includes a nozzle portion that is curved, and the nozzle portion is provided with a curved compressed air passage (13b) and a coolant passage (16b). The main axis of the compressed air passage (13b) coincides with the main axis of the nozzle portion, and the compressed air passage (13b) is surrounded by the coolant passage (16b). The nozzle section is provided with a waist-narrowing opening (17) in the middle section and a nozzle opening (18) at the end of the nozzle section. A flared opening is formed between the waist-narrowing opening (17) and the nozzle opening (18). The outlet of the coolant channel (16b) is located on the waistline of the waist-narrowing opening (17), and the outlet of the compressed air channel (13b) is located inside the waistline of the waist-narrowing opening (17).

2. The transformer cooling spray head according to claim 1, characterized in that, The compressed air channel (13b) has a structure that is larger at the top and smaller at the bottom. The larger end of the compressed air channel (13b) is the air inlet and is connected to the outside. The smaller end of the compressed air channel (13b) is the air outlet and is connected to the waist opening (17). The air inlet of the compressed air passage (13b) is connected to the compressed air intake passage (13a), which is open to the outside and far away from the waist opening (17).

3. The transformer cooling spray head according to claim 2, characterized in that, The coolant channel (16b) has a structure that is larger at the top and smaller at the bottom. The larger end of the coolant channel (16b) is the inlet and is connected to the outside. The smaller end of the coolant channel (16b) is the outlet and is connected to the constricted opening (17). The inlet of the coolant channel (16b) is connected to the coolant inlet channel (16a), which is open to the outside and far away from the waist opening (17).

4. The transformer cooling spray head according to claim 3, characterized in that, The diameter of the air inlet of the compressed air passage (13b) is twice the diameter of the air outlet.

5. The transformer cooling spray head according to claim 1, characterized in that, The angle between the sidewall of the opening and the central axis of the opening is α, where 20°≤α≤40°.

6. The transformer cooling spray head according to claim 1, characterized in that, The nozzle (18) is equipped with a filter screen.

7. A transformer cooling system, comprising a transformer having at least one transformer heat sink (8) disposed thereon, wherein all transformer heat sinks (8) are arranged at equal intervals from left to right, characterized in that, A spray device (10) is arranged at intervals between the transformer heat sink (8) and the gap between the transformer heat sink (8). The spray device (10) is provided with n*n spray heads as described in claims 1 to 6. The spray device (10) is connected to a coolant cooling device and a compressed air transmission device (19). A thermometer (11) is provided on the transformer heat sink (8). The thermometer (11) measures the surface temperature of the transformer heat sink (8) and sends the surface temperature of the transformer heat sink (8) to the controller (12). The controller (12) controls the coolant cooling device and the compressed air transmission device (19) to output the corresponding mass of coolant and the corresponding volume of compressed air according to the surface temperature of the transformer heat sink (8). The formula for calculating the mass of the coolant is: Among them, Q 放 ΔT is the heat dissipation of the transformer heat sink (8), c is the specific heat capacity of the coolant, ΔT is the temperature difference of the coolant from the initial temperature to the boiling point, and r is the heat of vaporization of the coolant. The heat dissipation Q of the transformer heat sink (8) 放 The calculation formula is: Q 放 =k×S×T 散 Where k is the heat dissipation coefficient, S is the surface area of ​​the heat sink, and T 散 The surface temperature of the transformer heat sink (8) is denoted as .

8. The transformer cooling system according to claim 7, characterized in that, The coolant cooling device includes a water storage tank (3), which is equipped with a semiconductor cooling chip (4). The water storage tank (3) is equipped with an electric inlet valve (2) at its inlet. The water storage tank (3) is connected to the inlet of a booster pump (6). The booster pump (6) is connected to one end of a delivery pipe (5). The other end of the delivery pipe (5) is connected to at least one delivery branch pipe. The delivery branch pipe is connected to the spray device (10) one by one. The liquid delivery pipe (5) is equipped with a liquid discharge electric valve (7); The controller (12) controls the inlet electric valve (2) and the outlet electric valve (7).

9. The transformer cooling system according to claim 8, characterized in that, The compressed air transmission device (19) includes an air filter (15), the air inlet of which is connected to the outside. The air inlet of the air filter (15) is equipped with an air intake electric valve (14). The air outlet of the air filter (15) is connected to one end of an air supply pipe (21). The other end of the air supply pipe (21) is connected to at least one air supply branch pipe. The air supply branch pipe is connected to the spray device (10) one by one. An electric air supply valve (9) is installed on the air supply branch pipe; The controller (12) controls the intake electric valve (14) and the supply electric valve (9).

10. The transformer cooling system according to claim 9, characterized in that, The number of spray heads is greatest near the middle of the transformer, and gradually decreases as they move away from the middle of the transformer; Within the spraying device (10), the spray heads are arranged alternately with the nozzles (18) facing left and right. The coolant inlet channel (16a) of the spray head is connected to the liquid delivery branch pipe through the liquid delivery end pipe; the compressed air inlet channel (13a) of the spray head is connected to the air delivery branch pipe through the air delivery end pipe.

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