Movable cooling system of main transformer

Abstract

The invention discloses a movable cooling system for a main transformer, and relates to the technical field of transformer cooling, the movable cooling system comprises a flat car, at least one spraying assembly and at least one heat absorbing tile, the flat car is provided with a water tank, a refrigerating device for refrigerating water in the water tank and an electric cabinet for controlling the refrigerating device, water in the water tank is sprayed to cooling fins of the main transformer through the spraying assembly, the heat absorption tile is provided with an arc-shaped cavity channel, the water in the water tank circularly flows through the arc-shaped cavity channel, and the arc-shaped cavity channel is used for being buckled to an oil outlet pipe or an oil return pipe of the cooling fins of the main transformer. Modularized installation, antifouling and waterproof performance, water and electricity separation design and safe and reliable use are achieved. The platform car is movable, the application field is flexible, and repeated investment is avoided. The refrigerating device can refrigerate water in the water tank, cold water in the water tank rapidly cools the cooling fins through the spraying assembly, rapid heat absorption is conducted on the oil outlet pipe or the oil return pipe through the heat absorption tile, and therefore rapid cooling of the main transformer is achieved, and the cooling effect is remarkable.

Description

Technical Field

[0001] The invention relates to the technical field of transformer cooling, and in particular to a mobile cooling system for a main transformer. Background Art

[0002] The main transformer is the core equipment of the substation, and its safe operation is the top priority for the reliable operation of the power grid. The heat dissipation principle of the main transformer is that the oil inside it is transported to the plate radiator through the oil outlet pipe. After the oil is cooled by the plate radiator, it returns to the main transformer through the return pipe. The oil circulates to take away the heat in the main transformer, achieving the effect of heat dissipation for the main transformer.

[0003] At present, the heat sink of the plate type radiator usually adopts natural cooling and air cooling, but the high temperature in summer causes the power load to rise rapidly, causing the main transformer to heat up. Conventional natural cooling and air cooling are difficult to quickly cool down the main transformer, and the main transformer is a long-term operating equipment and cannot be powered off. The usually adopted method is to increase the power and quantity of air cooling. Despite this, the cooling effect is still not ideal. The main transformer equipment operates at a high temperature for a long time, which affects the service life of the equipment and has prominent safety hazards. Summary of the invention

[0004] The object of the present invention is to provide a mobile cooling system for a main transformer to solve the problem of unsatisfactory heat dissipation effect of the main transformer in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mobile cooling system for a main transformer, comprising a flatbed truck, at least one spray assembly and at least one heat-absorbing tile, the flatbed truck being equipped with a water tank, a refrigeration device for cooling the water in the water tank and an electric control box for controlling the refrigeration device, the water in the water tank being sprayed onto the heat sink of the main transformer through the spray assembly, the heat-absorbing tile having an arc-shaped cavity, the water in the water tank circulates through the arc-shaped cavity, and the arc-shaped cavity is used to buckle onto the oil outlet pipe or the oil return pipe of the heat sink of the main transformer.

[0006] Furthermore, a water pump controlled by an electronic control box is installed on the flatbed truck, the pump inlet pipe of the water pump is connected to the drain pipe of the water tank through a first pipe, a first valve is arranged on the first pipe, the pump outlet pipe of the water pump is connected to the return pipe of the water tank through a second pipe, a second valve is arranged on the second pipe, the spray assembly is connected to the pump outlet pipe of the water pump through a first hose, the water inlet of the arc-shaped cavity is connected to the drain pipe of the cold water tank through a second hose, and the water outlet of the arc-shaped cavity is connected to the pump inlet pipe of the water pump through a third hose.

[0007] Furthermore, the spray assembly includes a spray pipe and a plurality of spray heads, the spray pipe is connected to the first hose, and the spray heads are arranged on the spray pipe at intervals.

[0008] Furthermore, the heat absorbing tile includes a coaxial outer arc piece and an inner arc piece, the edges of the outer arc piece and the inner arc piece are sealed and connected, the arc-shaped cavity is formed between the outer arc piece and the inner arc piece, and the inner diameter of the inner arc piece is adapted to the outer diameter of the oil outlet pipe or the oil return pipe of the heat sink of the main transformer.

[0009] Furthermore, the outer arc piece and the inner arc piece are fixedly connected or integrally formed.

[0010] Furthermore, the heat absorbing tile is buckled onto the oil outlet pipe or the oil return pipe and then fixed by tying with a clamp.

[0011] Furthermore, the inner arc sheet includes two arc sheet units, which are coaxially slidably connected to the outer arc sheet along the circumferential direction. When the two arc sheet units slide out of the outer arc sheet in the opposite direction, the arc-shaped cavity is formed between the outer arc sheet and the outer surface of the oil outlet pipe or the oil return pipe.

[0012] Furthermore, the heat absorbing tile is fastened to the oil outlet pipe or the oil return pipe and fixed by fasteners. The fasteners include an arc rod and an arc support plate fixedly connected to the inner side of the middle part of the arc rod. The inner diameter of the arc rod is larger than the outer diameter of the arc sheet unit. The arc support plate abuts against the outer surface of the oil outlet pipe or the oil return pipe, and the two ends of the arc rod are respectively screwed to the outer arc sheet.

[0013] Furthermore, locking pieces are respectively arranged between the two arc sheet units and the outer arc sheet. When the two arc sheet units slide into the outer arc sheet in the reverse direction, the two arc sheet units abut and seal, and the locking pieces lock the two arc sheet units.

[0014] Furthermore, there are two heat absorbing tiles, one of which is used to be buckled onto the oil return pipe, and the other heat absorbing tile is used to be buckled onto the oil outlet pipe.

[0015] In the above technical scheme, the present invention provides a mobile cooling system for the main transformer, which is modularly installed, anti-fouling and waterproof, and has a water-electricity separation design, and is safe and reliable to use. The platform vehicle is movable, and the application site is flexible, avoiding repeated investment. The main transformer is a long-term online operation equipment. The installation of this cooling system does not require the main transformer to be powered off, does not affect the normal operation of the main equipment, and is safe and reliable. A refrigeration device is provided to cool the water in the water tank. The cold water in the water tank is sprayed onto the heat sink of the main transformer through a spray assembly to quickly cool the heat sink. The heat absorbing tiles that can be snapped onto the oil outlet pipe or the return oil pipe of the heat sink are designed. The cold water in the water tank circulates through the heat absorbing tiles, and can quickly take away the heat on the return oil pipe or the oil outlet pipe, thereby achieving the effect of quickly cooling the main transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0017] Figure 1 A schematic diagram of the structure provided for an embodiment; Figure 2 A front view of the structure provided for the embodiment; Figure 3 A top view of the structure provided for the embodiment; Figure 4 A schematic diagram of the connection structure between the water tank and the water pump provided in the embodiment; Figure 5 A schematic diagram of the structure of a spray assembly provided in an embodiment; Figure 6 A schematic diagram of the structure of a heat absorbing tile provided in an embodiment; Figure 7 A structural side view of a heat absorbing tile provided in an embodiment; Figure 8 A schematic structural diagram of another working state of the heat absorbing tile provided in the embodiment; Fig. 9 A structural side view of the heat absorbing tile provided in the embodiment in another working state; Fig.10 A structural cross-sectional view of the heat absorbing tile provided in the embodiment in another working state; Fig.11 A schematic diagram of the structure of the outer arc piece provided in the embodiment; Fig.12 A schematic diagram of the structure of an arc unit provided in an embodiment; Fig.13 A schematic structural diagram of a heat absorbing tile provided in another embodiment.

[0018] Description of reference numerals: 1. Flatbed car; 2. Water tank; 21. Drain pipe; 22. Return pipe; 23. Drain pipe; 24. Injection pipe; 3. Refrigeration device; 4. Water pump; 41. Pump inlet pipe; 42. Pump outlet pipe; 5. Electric control box; 6. Spray assembly; 61. Spray pipe; 62. Spray head; 7. Heat absorbing tile; 71. Outer arc piece; 72. Inner arc piece; 721. Arc piece unit; 73. Arc cavity; 74. Water inlet; 75. Water outlet; 76. Hoop; 77. Arc rod; 78. Arc support plate; 79. Stopper; 710. Insulation layer; 711. First gasket; 712. Second gasket; 713. Third gasket; 8. First pipeline; 9. Second pipeline; 10. First valve; 11. Second valve. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] See also Figure 1-13A mobile cooling system for a main transformer provided by an embodiment of the present invention comprises a flatbed truck 1, at least one spray assembly 6 and at least one heat absorbing tile 7. A water tank 2, a refrigeration device 3, a water pump 4 and an electric control box 5 are installed on the flatbed truck 1. The refrigeration device 3 is used to cool the water in the water tank 2, and the electric control box 5 is used to control the refrigeration device 3 and the water pump 4. The refrigeration device 3 can adopt the existing refrigeration technology, which will not be described here. A placement rack and a limiting pier are also provided on the flatbed truck 1. The placement rack is used to place the spray assembly 6, and the limiting pier is used to place the heat absorbing tile 7. A discharge pipe and a drain pipe 23 are respectively provided at the bottom of the water tank 2. When the water tank 2 is maintained or the cooling system is stopped, the drain pipe 23 can drain the water in the water tank 2. A return pipe 22 is provided on the top of the water tank 2. A water injection pipe 24 is also provided on the water tank 2. The water injection pipe 24 can be connected to tap water to inject water into the water tank 2. Refer to Figure 4 The pump inlet pipe 41 of the water pump 4 is connected to the drain pipe 21 of the water tank 2 through the first pipe 8, and the pump outlet pipe 42 of the water pump 4 is connected to the return pipe 22 of the water tank 2 through the second pipe 9. The water in the water tank 2 flows through the discharge pipe, the first pipe 8, the pump inlet pipe 41, the water pump 4, the pump outlet pipe 42, the second pipe 9 and the return pipe 22 in sequence and then returns to the water tank 2, thus realizing water circulation. A first valve 10 is provided on the first pipe 8, and a second valve 11 is provided on the second pipe 9. The first valve 10 and the second valve 11 are electromagnetic valves, and manual valves may also be used.

[0021] A temperature sensor is provided in the water tank 2, and the temperature sensor is electrically connected to the thermostat in the electric control box 5. The thermostat starts and stops the refrigeration compressor of the refrigeration device 3 according to the temperature feedback from the temperature sensor in the water tank 2. The compressor works, refrigeration starts, and the water pump 4 is started to circulate cold water at the same time. The water tank 2 also has a water level controller, which is used to control the amount of water stored in the water tank 2. The water level controller is a prior art and will not be described here.

[0022] See also Figure 5 The spray assembly 6 includes a spray pipe 61 and a plurality of spray heads 62. The spray pipe 61 is a hard metal pipe. The spray pipe 61 is connected to one end of the first hose. A spray valve is also provided at the connection between the spray pipe 61 and the first hose. The other end of the first hose is connected to the branch interface on the pump outlet pipe 42 of the water pump 4. The spray heads 62 are arranged at intervals on the spray pipe 61. The water in the spray pipe 61 is sprayed out through the spray heads 62. When in use, the spray assembly 6 is placed above the radiator of the main transformer radiator, with the spray heads 62 facing downward. The cold water in the water tank 2 is sprayed onto the radiator through the spray assembly 6. The cold water sprays downward along the radiator to absorb the heat of the radiator, which plays a role in rapid cooling. At the same time, as an open main transformer heat dissipation interval, the water spraying from top to bottom can play a role in cleaning the radiator, thereby accelerating the heat dissipation effect of the radiator during normal natural cooling and air cooling.

[0023] The heat absorbing tile 7 is in the shape of a semi-cylindrical tube with an arc-shaped cavity 73 inside. A water inlet 74 and a water outlet 75 connected to the arc-shaped cavity 73 are provided on the heat absorbing tile 7. The water inlet 74 and the water outlet 75 are respectively arranged at the diagonals of the heat absorbing tile 7. The water inlet 74 is connected to the branch interface on the drain pipe 21 of the cold water tank 2 through a second hose, and the water outlet 75 is connected to the branch interface on the pump inlet pipe 41 of the water pump 4 through a third hose. When in use, the arc-shaped cavity 73 of the heat-absorbing tile 7 is buckled onto the return oil pipe or the oil outlet pipe of the main transformer radiator, and the cold water in the water tank 2 flows into the arc-shaped cavity 73 through the discharge pipe and the second hose. The water in the arc-shaped cavity 73 absorbs the heat in the return oil pipe or the oil outlet pipe, and flows back to the water tank 2 through the third hose, the pump inlet pipe 41, the water pump 4, the pump outlet pipe 42, the second pipeline 9 and the return water pipe 22 for re-cooling, thereby quickly cooling the oil in the return oil pipe or the oil outlet pipe of the main transformer radiator. The heat-absorbing tile 7 has an obvious cooling effect, and the water in the water tank 2 is recycled, which not only solves the water problem, but also the water flowing out of the arc-shaped cavity 73 has a higher temperature, but is still lower than the temperature of the oil in the radiator. After returning to the water tank 2, it can reduce the work done by the refrigeration device 3 compared to the water newly injected into the water tank 2 through the main water pipe.

[0024] The main transformer mobile cooling system has three working modes, namely spray mode, heat absorption tile mode and combination mode.

[0025] In the spray mode, only the spray component 6 works, the spray component 6 is placed above the heat sink, the first valve 10 is in a fully open state, and the second valve 11 is in a closed state (a valve may or may not be set at the water inlet 74 or the water outlet 75 of the heat absorbing tile 7. If a valve is set, the valve is closed). The cold water in the water tank 2 flows through the discharge pipe, the first pipeline 8, the pump inlet pipe 41, the water pump 4, the pump outlet pipe 42 and the first hose in sequence to reach the spray pipe 61, and then is sprayed onto the heat sink from each nozzle 62.

[0026] In the heat absorbing tile 7 mode, only the heat absorbing tile 7 works, the heat absorbing tile 7 is buckled on the oil outlet pipe or the oil return pipe, the first valve 10 is in a closed state, the second valve 11 is in an open state, the spray valve of the spray assembly 6 is in a closed state, and the cold water in the water tank 2 flows through the discharge pipe, the second hose, the arc-shaped cavity 73, the third hose, the pump inlet pipe 41, the water pump 4, the pump outlet pipe 42 and the return pipe 22 in sequence and then returns to the water tank 2.

[0027] In the combined mode, the spray assembly 6 and the heat absorbing tile 7 work together, the spray assembly 6 is placed above the heat sink, the heat absorbing tile 7 is buckled on the oil outlet pipe or the oil return pipe, the first valve 10 is in a semi-open state, the second valve 11 is in a semi-open state, the spray valve is in an open state, and the water in the water tank 2 flows out of the discharge pipe and is divided into two paths. One path flows into the pump inlet pipe 41 through the second hose, the arc cavity 73, and the third hose, and the other path flows directly into the pump inlet pipe 41 through the first pipe 8. The two paths are merged in the pump inlet pipe 41 and are transported to the pump outlet pipe 42 by the water pump 4. At this time, the water flow in the pump outlet pipe 42 is divided into two paths again, one path flows to the spray pipe 61 through the first hose and is sprayed from each nozzle 62, and the other path flows back to the water tank 2 through the second pipe 9 and the return pipe 22. This mode has the best heat dissipation effect on the main transformer and is suitable for situations where the heat dissipation demand of the main transformer is particularly high.

[0028] See also Figure 6-Figure 13 The heat absorbing tile 7 specifically includes an outer arc piece 71 and an inner arc piece 72 in structure. The outer arc piece 71 and the inner arc piece 72 are arranged coaxially. The inner diameter of the outer arc piece 71 is larger than the outer diameter of the inner arc piece 72. The radius difference between the two is preferably 10-30mm. The edges of the outer arc piece 71 and the inner arc piece 72 are sealed and connected. An arc cavity 73 is formed between the outer arc piece 71 and the inner arc piece 72. The inner diameter of the inner arc piece 72 is adapted to the outer diameter of the oil outlet pipe or the oil return pipe of the heat sink of the main transformer. The outer surface of the outer arc piece 71 of the heat absorbing tile 7 is covered with a heat insulation layer 710, which can reduce the heat exchange between the outer arc piece 71 and the outside air.

[0029] On this basis, there are two embodiments for the design of the heat absorbing tile 7. Fig.13 In the first embodiment, the outer arc piece 71 and the inner arc piece 72 are fixedly connected or integrally formed, and the heat absorbing tile 7 is buckled onto the oil outlet pipe or the oil return pipe and fixed by a clamp 76. The heat of the oil is transferred to the inner arc piece 72 through the wall of the oil outlet pipe or the oil return pipe and then absorbed by the cold water in the arc cavity 73.

[0030] See also Figure 6-Figure 12 In the second embodiment, the inner arc piece 72 and the outer arc piece 71 are of split design. The inner arc piece 72 includes two arc piece units 721. The two arc piece units 721 are coaxially slidably connected to the outer arc piece 71 along the circumferential direction. An arc-shaped sliding structure and a first sealing gasket 711 are provided between the end faces of the two arc units and the corresponding ends of the outer arc piece 71. A second sealing gasket 712 is provided at the edge of the outer arc piece 71 that contacts the outer side of the inner arc piece 72. A third sealing gasket 713 is provided on the sides where the two arc piece units 721 are close to each other. A stopper 79 is rotatably or slidably provided on the outer arc piece 71. The heat absorbing tile 7 is fastened to the oil outlet pipe or the oil return pipe and then fixed by fasteners. The heat absorbing tile 7 in this embodiment has two heat absorbing forms: refer to Figure 6-Figure 7When the two arc sheet units 721 slide into the outer arc sheet 71 in the reverse direction, the adjacent sides of the two arc sheet units 721 are sealed against each other, and the stopper 79 rotates or slides to a state of resisting the arc sheet units 721, thereby locking the two arc sheet units 721 to the outer arc sheet 71, and forming an arc-shaped cavity 73 between the two arc sheet units 721 and the outer arc sheet 71, which is the first heat absorption state; refer to Figure 8-Figure 10 , rotate or slide the stopper 79 until it is no longer blocked by the arc sheet unit 721. When the two arc sheet units 721 slide out of the outer arc sheet 71 in the reverse direction, an arc-shaped cavity 73 is formed between the outer arc sheet 71 and the outer surface of the oil outlet pipe or the oil return pipe. This is the second heat absorption form.

[0031] When the heat absorbing tile 7 is used in the first heat absorbing form, its usage method and heat absorbing effect are equivalent to the heat absorbing tile 7 in the first embodiment. The heat of the oil is transferred to the two arc-shaped unit 721 through the wall of the oil outlet pipe or the oil return pipe, and then absorbed by the cold water flowing in the arc-shaped cavity 73. It is relatively convenient to operate and can be used by directly snapping it onto the oil outlet pipe or the oil return pipe.

[0032] When the heat absorbing tile 7 is used in the second heat absorbing form, it is necessary to clean the outer surface of the oil outlet pipe or the oil return pipe first, buckle the heat absorbing tile 7 onto the oil outlet pipe or the oil return pipe in the first heat absorbing form, slide the two arc sheet units 721 out of the outer arc sheet 71 in the opposite direction to form the second heat absorbing form, and then tighten the fasteners. The heat of the oil is directly transferred to the circulating cold water in the arc cavity 73 through the wall of the oil outlet pipe or the oil return pipe and is absorbed, which has a more significant cooling effect on the oil.

[0033] The design of the fasteners should be adapted to the shape change of the heat absorbing tile 7. Specifically, the fasteners include a hard arc rod 77 and an arc support plate 78 fixedly connected to the inner side of the middle of the arc rod 77. The inner diameter of the arc rod 77 is larger than the outer diameter of the arc sheet unit 721. The arc support plate 78 abuts against the outer surface of the oil outlet pipe or the oil return pipe. The two ends of the arc rod 77 are respectively screwed to the outer arc sheet 71. The design of the fasteners can not only fix the heat absorbing tile 7 to the oil outlet pipe or the oil return pipe, but also will not hinder the sliding of the two arc sheet units 721 compared to the ordinary clamp 76. There is at least one fastener on each heat absorbing tile 7, and the fixing effect is better if two fasteners are set.

[0034] As for the number of spray assemblies 6 and heat absorbing tiles 7, the preferred solution is to configure two spray assemblies 6 and two heat absorbing tiles 7 respectively, the two spray assemblies 6 are arranged at intervals above the heat sink of the main transformer, one of the two heat absorbing tiles 7 is snapped onto the oil return pipe, and the other heat absorbing tile 7 is snapped onto the oil outlet pipe.

[0035] The above describes some exemplary embodiments of the present invention, which should not be understood as limiting the scope of protection of the claims of the present invention. For those skilled in the art, the described embodiments can be modified in other different ways without departing from the spirit and scope of the present invention.

Claims

1. A mobile cooling system for a main transformer, characterized in that: It includes a flatbed vehicle, at least one spray assembly and at least one heat absorbing tile; The flatbed truck is equipped with a water tank, a refrigeration device for cooling the water in the water tank, and an electric control box for controlling the refrigeration device; The water in the water tank is sprayed onto the heat sink of the main transformer through the spray assembly; The heat absorbing tile has an arc-shaped cavity, and the water in the water tank circulates through the arc-shaped cavity. The arc-shaped cavity is used to buckle onto the oil outlet pipe or the oil return pipe of the heat sink of the main transformer.

2. A mobile cooling system for main transformer according to claim 1, characterized in that: A water pump controlled by the electric control box is also installed on the flatbed truck. The pump inlet pipe of the water pump is connected to the drain pipe of the water tank through a first pipe, and a first valve is provided on the first pipe. The pump outlet pipe of the water pump is connected to the return pipe of the water tank through a second pipe, and a second valve is provided on the second pipe. The spray assembly is connected to the pump outlet pipe of the water pump through the first hose, the water inlet of the arc cavity is connected to the drain pipe of the cold water tank through the second hose, and the water outlet of the arc cavity is connected to the pump inlet pipe of the water pump through the third hose.

3. A mobile cooling system for main transformer according to claim 2, characterized in that: The spray assembly comprises a spray pipe and a plurality of spray heads. The spray pipe is connected to a first hose, and the spray heads are arranged on the spray pipe at intervals.

4. A mobile cooling system for a main transformer according to claim 1 or 2, characterized in that: The heat absorbing tile includes a coaxial outer arc piece and an inner arc piece, the edges of the outer arc piece and the inner arc piece are sealed and connected, the arc-shaped cavity is formed between the outer arc piece and the inner arc piece, and the inner diameter of the inner arc piece is adapted to the outer diameter of the oil outlet pipe or the oil return pipe of the heat sink of the main transformer.

5. A mobile cooling system for main transformer according to claim 4, characterized in that: The outer arc piece and the inner arc piece are fixedly connected or integrally formed.

6. A mobile cooling system for main transformer according to claim 5, characterized in that: The heat absorbing tile is buckled onto the oil outlet pipe or the oil return pipe and then fixed by tying with a clamp.

7. A mobile cooling system for main transformer according to claim 4, characterized in that: The inner arc sheet includes two arc sheet units, which are coaxially connected to the outer arc sheet in a circumferential sliding manner. When the two arc sheet units slide out of the outer arc sheet in the reverse direction, the arc cavity is formed between the outer arc sheet and the outer surface of the oil outlet pipe or the oil return pipe.

8. A mobile cooling system for main transformer according to claim 7, characterized in that: The heat absorbing tile is fastened to the oil outlet pipe or the oil return pipe and fixed by a fastener. The fastener includes an arc rod and an arc support plate fixedly connected to the inner side of the middle part of the arc rod. The inner diameter of the arc rod is larger than the outer diameter of the arc sheet unit. The arc support plate abuts against the outer surface of the oil outlet pipe or the oil return pipe, and the two ends of the arc rod are respectively screwed to the outer arc sheet.

9. The mobile cooling system for main transformer according to claim 7, characterized in that: Locking pieces are respectively arranged between the two arc sheet units and the outer arc sheet. When the two arc sheet units slide into the outer arc sheet in the reverse direction, the two arc sheet units abut against each other and are sealed, and the locking pieces lock the two arc sheet units.

10. The mobile cooling system for main transformer according to claim 1, characterized in that: There are two heat absorbing tiles, one of which is used to be buckled onto the oil return pipe, and the other heat absorbing tile is used to be buckled onto the oil outlet pipe.

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