A transformer with cooling function

Abstract

This invention discloses a transformer with a cooling function, relating to the technical field of transformers. The transformer includes a connecting frame fixed to one side, a cooling fan fixed to the connecting frame, and a U-shaped cavity on the side of the connecting frame near the cooling fan. A first oil pipe connects the transformer's oil chamber to the U-shaped cavity of the connecting frame. An oil pump is fixed to the transformer, and the first oil pipe connects to the oil pump. The oil pump is used to pump oil from the transformer's oil chamber into the first oil pipe. This invention reduces the continuous operating time of a single cooling route by alternately using two cooling routes, thus reducing the workload and slowing down the aging process of the pipes. Simultaneously, it ensures that each route operates in optimal condition, avoiding the problem of insignificant cooling due to long-term operation of a single cooling route.

Description

Technical Field

[0001] This invention relates to the technical field of transformers, and more particularly to a transformer with a cooling function. Background Technology

[0002] With the continuous expansion of the power system and the sustained growth of electricity demand, oil-immersed transformers are facing increasingly higher workloads and more stringent performance requirements.

[0003] However, existing oil-immersed transformers typically use natural cooling for heat dissipation. This method is slow and cannot dissipate heat in time during long-term operation. Another method is to use a cooling device to cool the cooling oil, which then flows back into the transformer. This method usually involves the cooling oil passing through a single cooling pipe, and the cooling power is fixed. As the transformer operates for a long time, the cooling oil temperature rises along with the transformer, causing the cooling effect of the cooling oil to decrease. Summary of the Invention

[0004] To overcome the drawback that the cooling oil's cooling effect decreases as the transformer's temperature rises with prolonged operation, this invention provides a transformer with a cooling function.

[0005] A transformer with a cooling function includes a transformer, a connecting frame fixedly connected to one side of the transformer, a cooling fan fixedly connected to the connecting frame, a U-shaped cavity opened on the side of the connecting frame near the cooling fan, a first oil pipe communicating between the oil chamber of the transformer and the U-shaped cavity of the connecting frame, an oil pump fixedly connected to the transformer, the first oil pipe communicating with the oil pump, the oil pump being used to pump oil from the oil chamber of the transformer into the first oil pipe, and a plurality of cooling channels provided on the side of the connecting frame near the cooling fan, the cooling channels communicating with the U-shaped cavity of the connecting frame. The connecting frame has a second oil pipe connected to the side of its U-shaped cavity away from the first oil pipe. The connecting frame is fixedly connected to an oil storage tank symmetrically distributed along the connecting frame. The oil storage tank is a closed box. Both sides of the oil storage tank are connected to a third oil pipe. The transformer's oil cavity is connected to a fourth oil pipe on the side away from the first oil pipe. The second oil pipe and the fourth oil pipe are both connected to the third oil pipe on the same side. The second oil pipe and the fourth oil pipe are rotatably connected to a switching valve on the side of the second oil pipe and the side of the fourth oil pipe closest to the adjacent third oil pipe. The fourth oil pipe is fixedly connected to a temperature sensor for detecting oil temperature.

[0006] In a preferred embodiment of the present invention, the height of the third oil pipe on one side of the oil tank is higher than the height of the third oil pipe on the other side of the oil tank.

[0007] In a preferred embodiment of the present invention, a motor is further included, the motor is fixedly connected to the connecting frame, a crank is fixedly connected to the output shaft of the motor, a connecting rod is rotatably connected between the two switching valves, and the crank is rotatably connected to the connecting rod.

[0008] In a preferred embodiment of the present invention, the temperature sensor is electrically connected to the motor via a controller.

[0009] In a preferred embodiment of the present invention, a storage tube is further included, which is fixedly connected to the second oil pipe. The storage tube stores a liquid that expands due to heat. A pusher is fixedly connected to the connecting frame, and the pusher is connected to the storage tube. A lifting frame is slidably connected inside the pusher. Threaded grooves are opened on both sides of the lifting frame. Except for the middle one, all the other cooling channels are rotatably connected to an adjustment plate. The adjustment plate is used to block the entrance of the adjacent cooling channel, and the adjustment plate cooperates with the threaded groove of the adjacent lifting frame.

[0010] In a preferred embodiment of the present invention, an annular filter frame is further included, the annular filter frame being threadedly connected to the first oil pipe.

[0011] In a preferred embodiment of the present invention, a heat dissipation plate frame is further included, which is fixedly connected to the corresponding oil storage tank.

[0012] In a preferred embodiment of the present invention, one side of the heat dissipation plate frame is a plate surface, which replaces the side wall of the oil storage tank and is used to dissipate heat from the cooling oil in the oil storage tank.

[0013] Compared with the prior art, the present invention has the following advantages: This invention reduces the continuous working time of a single cooling route by alternating between two cooling routes, thereby reducing the workload and slowing down the aging process of each pipe. At the same time, it ensures that each route can work in optimal condition, avoiding the problem of insignificant cooling due to long-term operation of a single cooling route.

[0014] This invention employs an automatic switching mechanism so that when one cooling path fails to provide adequate cooling, another cooling path can immediately take over the cooling task. This ensures that there is always a cooling path in good condition participating in the operation, enabling the transformer to always receive effective cooling and maintain it within a safe operating temperature range. This prevents the transformer from overheating and being damaged due to cooling failure, thus guaranteeing the stability of the power supply.

[0015] This invention improves the flexibility of daily maintenance by allowing technicians to clean, replace filters, or add new oil to another cooling circuit without shutting down the system while one cooling circuit is in operation.

[0016] This invention uses a pusher to open and close the adjustment plate, which enables the cooling oil to pass through only the middle cooling channel when the oil temperature is low, thus ensuring the service life of the cooling channels on both sides. When the oil temperature is high, the cooling efficiency of the cooling oil is improved by opening the cooling channels on both sides.

[0017] This invention uses a ring-shaped filter frame to block impurities, preventing impurities inside the transformer from scratching the cooling channels.

[0018] This invention achieves rapid heat dissipation of the oil in the oil tank through the cooperation of the heat dissipation plate frame and the oil tank. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a partial three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the first oil pipe, the oil pump, and the second oil pipe.

[0022] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the oil tank, the fourth oil pipe, and the temperature sensor.

[0023] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the second oil pipe, the third oil pipe, and the oil storage tank.

[0024] Figure 6 This is a three-dimensional structural cross-sectional view of the switching valve, the third oil pipe, and the switching valve of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, such as the motor, crank, and connecting rod.

[0026] Figure 8 This is a three-dimensional structural diagram of the switching valve, motor, and connecting rod of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the components of the present invention, including the second oil pipe, the third oil pipe, and the storage pipe.

[0028] Figure 10 This is an enlarged three-dimensional structural diagram of point A in the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the lifting frame and debugging plate of the present invention.

[0030] Figure 12 This is a three-dimensional structural diagram of the first oil pipe and heat sink bracket of the present invention.

[0031] Figure 13 This is a three-dimensional structural diagram of the annular filter frame of the present invention.

[0032] Figure 14 This is a three-dimensional structural diagram of the heat sink frame of the present invention.

[0033] The above-mentioned figures include the following reference numerals: 101, transformer; 102, connecting frame; 103, cooling fan; 104, first oil pipe; 105, oil pump; 106, cooling channel; 107, second oil pipe; 108, switching valve; 109, third oil pipe; 110, oil storage tank; 111, fourth oil pipe; 112, temperature sensor; 201, motor; 202, crank; 203, connecting rod; 301, storage pipe; 302, push frame; 303, lifting frame; 304, debugging board; 401, annular filter frame; 501, heat dissipation plate frame. Detailed Implementation

[0034] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0035] Example 1: A transformer with cooling function, such as Figures 1-6As shown, the system includes a transformer 101, a connecting frame 102 fixed to the front of the transformer 101, a cooling fan 103 fixed to the top of the connecting frame 102, a U-shaped cavity on the upper side of the connecting frame 102, a first oil pipe 104 connecting the oil chamber of the transformer 101 and the U-shaped cavity of the connecting frame 102, an oil pump 105 fixed to the lower left side of the transformer 101, the first oil pipe 104 connecting to the oil pump 105, and the oil pump 105 pumping oil from the oil chamber of the transformer 101 into the first oil pipe 104. Three cooling channels 106 are provided on one side of the top of the connecting frame 102, and the cooling channels 106 connect to the U-shaped cavity of the connecting frame 102. A second oil pipe 107 connects to the right side of the U-shaped cavity of the connecting frame 102. The connecting frame 102 is fixedly connected to an oil storage tank 110 symmetrically distributed along the front and rear of the connecting frame 102. The oil storage tank 110 is a closed box. The left and right sides of the oil storage tank 110 are connected to a third oil pipe 109. The height of the third oil pipe 109 on the left side of the oil storage tank 110 is higher than that of the third oil pipe 109 on the right side of the oil storage tank 110. The right side of the oil cavity of the transformer 101 is connected to a fourth oil pipe 111. The second oil pipe 107 is connected to the third oil pipe 109 on the left side, and the fourth oil pipe 111 is connected to the third oil pipe 109 on the right side. The left side of the second oil pipe 107 and the lower front side of the fourth oil pipe 111 are rotatably connected to a switching valve 108. The fourth oil pipe 111 is fixedly connected to a temperature sensor 112 for detecting oil temperature.

[0036] like Figure 1 , Figure 7 and Figure 8 As shown, it also includes a motor 201, which is fixedly connected to the left side of the connecting frame 102. The temperature sensor 112 is electrically connected to the motor 201 through the controller. The output shaft at the top of the motor 201 is fixedly connected to a crank 202. A connecting rod 203 is rotatably connected between the two switching valves 108. The crank 202 and the connecting rod 203 are rotatably connected.

[0037] This transformer 101 has two cooling routes. The first cooling route involves the hot oil inside the transformer 101 flowing upwards through the first oil pipe 104 into the cooling channel 106 for cooling. The cooled oil then flows to the right into the second oil pipe 107, and then to the left along the second oil pipe 107 to the left-side switching valve 108. From the left-side switching valve 108, the cooling oil flows backwards into the left-side rear third oil pipe 109, then into the rear oil storage tank 110. It then flows along the right-side rear third oil pipe 109 to the right-side switching valve 108, and then upwards from the right-side switching valve 108 into the fourth oil pipe 111, finally flowing back along the fourth oil pipe 111. Inside transformer 101; Second cooling route: Hot oil inside transformer 101 flows upward into cooling channel 106 through first oil pipe 104 for cooling. The cooled oil flows to the right into second oil pipe 107, and then flows to the left along second oil pipe 107 to the left-side switching valve 108. Cooling oil flows forward from left-side switching valve 108 into the left front third oil pipe 109, then into the front oil tank 110, and then along right front third oil pipe 109 to the right-side switching valve 108, and then flows upward from right-side switching valve 108 into fourth oil pipe 111, and finally flows back into transformer 101 along fourth oil pipe 111.

[0038] Initially, both the front and rear oil tanks 110 are pre-stored with cooling oil, and the cooling effect of each route is achieved by the cooling fan 103 and the pre-stored cooling oil in the oil tank 110. During the operation of the transformer 101, firstly, by controlling the switching valve 108, the valve port of the left switching valve 108 is turned towards the third oil pipe 109 on the left rear side, and the valve port of the right switching valve 108 is turned towards the third oil pipe 109 on the right rear side, so that the second oil pipe 107 is connected to the third oil pipe 109 on the left rear side, and the fourth oil pipe 111 is connected to the third oil pipe 109 on the right rear side. The first cooling route is opened and the second cooling route is closed. Then, the oil pump 105 and the cooling fan 103 are started, so that the hot oil in the transformer 101 flows back into the transformer 101 through the first cooling route. This cycle is repeated to achieve the cooling effect. However, as the operating time increases, the temperature of the cold oil in the rear oil tank 110 rises continuously due to the limited oil volume and constant heat exchange. The cooling effect of the first cooling route eventually relies solely on the cooling fan 103, leading to a decrease in cooling efficiency. During the operation of the first cooling route, the second cooling route is closed, keeping the cold oil in the front oil tank 110 in a state of cold storage. When the temperature sensor 112 detects that the oil temperature flowing back into the transformer 101 from the fourth oil pipe 111 is higher than a preset value, the temperature sensor 112 sends an electrical signal. The controller receives the electrical signal and controls the output shaft of the motor 201 to drive... When crank 202 rotates, it pushes the left and right switching valves 108 to rotate via connecting rod 203. This causes the valve port of the left switching valve 108 to face the third oil pipe 109 on the left front side, and the valve port of the right switching valve 108 to face the third oil pipe 109 on the right front side. This connects the second oil pipe 107 with the third oil pipe 109 on the left front side, and the fourth oil pipe 111 with the third oil pipe 109 on the right front side. The first cooling route is closed and cold storage is performed. The second cooling route is opened, and the hot oil in the transformer 101 flows back into the transformer 101 through the second cooling route. This cycle is repeated to achieve the cooling effect. Repeat the above steps to achieve the alternation of cooling routes. In this way, by using two cooling routes alternately, the continuous working time of a single cooling route is reduced, the workload is reduced, and the aging process of each pipe is slowed down. At the same time, it ensures that each route can work in the best condition and avoids the problem of insignificant cooling due to long-term operation of a single cooling route.

[0039] This invention establishes an automatic switching mechanism so that when one cooling path fails to provide adequate cooling, another cooling path can immediately take over the cooling task, ensuring that there is always a cooling path in good condition participating in the operation. This allows the transformer to always receive effective cooling and maintain it within a safe operating temperature range, preventing overheating damage to the transformer due to cooling failure and ensuring the stability of the power supply.

[0040] This invention allows technicians to perform operations such as cleaning, replacing filters, or adding new oil to another cooling circuit without shutting down the system while one cooling circuit is in operation, thus improving the flexibility of daily maintenance.

[0041] Example 2: Based on Example 1, such as Figure 1 , Figure 2 , Figure 9 , Figure 10 and Figure 11As shown, it also includes a storage tube 301, which is fixedly connected to the top left side of the second oil pipe 107. The storage tube 301 stores liquid that expands when heated. A pusher 302 is fixedly connected to the upper left side of the connecting frame 102. The pusher 302 is connected to the storage tube 301. A lifting frame 303 is slidably connected to the top of the pusher 302. Threaded grooves are opened on the front and rear sides of the lifting frame 303. The cooling channels 106 on the front and rear sides are rotatably connected to the adjustment plates 304. The adjustment plates 304 on the front and rear sides are used to block the inlets of the cooling channels 106 on the front and rear sides respectively. The adjustment plates 304 cooperate with the threaded grooves of the adjacent lifting frames 303.

[0042] To reduce wear on the cooling channel 106 when the oil temperature is low, and to accelerate heat dissipation when the oil temperature is too high, the specific operation is as follows: When the cooling oil circulating out of the transformer is in a low-temperature state after cooling, the debugging board 304 is in a closed state, and the oil can only circulate in the middle cooling channel 106. As the cooling oil circulates continuously, the cooling effect decreases. When the liquid in the storage tube 301 senses the temperature rise of the cooling oil, the liquid in the storage tube 301 begins to expand due to the heat and enters the push frame 302, thereby pushing the lifting frame 30. 3. Moving upwards causes the adjustment plate 304 to rotate, so that the adjustment plate 304 no longer blocks the entrances of the cooling channels 106 on both sides, thereby opening the cooling channels 106 on both sides of the connecting frame 102, thus accelerating the heat dissipation of the cooling oil. By pushing the adjustment plate 304 to open and close through the pushing frame 302, when the oil temperature is low, the cooling oil only passes through the middle cooling channel 106, thus ensuring the service life of the cooling channels 106 on both sides. When the oil temperature is high, the cooling efficiency of the cooling oil is improved by opening the cooling channels 106 on both sides.

[0043] like Figure 2 , Figure 12 and Figure 13 As shown, it also includes an annular filter frame 401, which is threadedly connected to the upper left side of the first oil pipe 104.

[0044] To prevent impurities inside the transformer 101 from entering the cooling channel 106 and scratching it, the specific operation is as follows: When impurities inside the transformer 101 flow with the cooling oil, they are blocked by the annular filter frame 401, thus blocking the impurities on the left side of the cooling channel 106. When it is necessary to clean the impurities, the annular filter frame 401 can be removed by rotating it counterclockwise. In summary, the annular filter frame 401 blocks the impurities, preventing them from scratching the cooling channel 106.

[0045] like Figure 1 , Figure 2 , Figure 12 and Figure 14As shown, it also includes several heat dissipation plate frames 501, which are fixed to the corresponding oil tanks 110. One side of the heat dissipation plate frame 501 is a plate surface, which replaces the side wall of the oil tank 110 and is used to dissipate heat from the cooling oil in the oil tank 110.

[0046] To accelerate the cooling speed of the oil in the oil tank 110, the specific operation is as follows: When the high-temperature oil enters the oil tank 110, the heat dissipation plate frame 501 increases the contact area with the oil. The heat of the oil is transferred more quickly to the inclined surface and side wall of the top of the heat dissipation plate frame 501 through multiple heat dissipation pipes. Then, the heat is carried away by the cooling fan 103, achieving rapid heat dissipation. In summary, through the cooperation of the heat dissipation plate frame 501 and the oil tank 110, rapid heat dissipation of the oil in the oil tank 110 is achieved.

[0047] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A transformer with a cooling function, characterized in that, The system includes a transformer (101), a connecting frame (102) fixedly connected to one side of the transformer (101), a cooling fan (103) fixedly connected to the connecting frame (102), a U-shaped cavity opened on the side of the connecting frame (102) near the cooling fan (103), a first oil pipe (104) connecting the oil chamber of the transformer (101) and the U-shaped cavity of the connecting frame (102), an oil pump (105) fixedly connected to the transformer (101), the first oil pipe (104) connecting to the oil pump (105), the oil pump (105) being used to pump oil from the oil chamber of the transformer (101) into the first oil pipe (104), a plurality of cooling channels (106) provided on the side of the connecting frame (102) near the cooling fan (103), the cooling channels (106) connecting to the U-shaped cavity of the connecting frame (102), and the connecting... The side of the connecting frame (102) away from the first oil pipe (104) is connected to a second oil pipe (107). The connecting frame (102) is fixedly connected to an oil storage tank (110) symmetrically distributed along the connecting frame (102). The oil storage tank (110) is a closed box. Both sides of the oil storage tank (110) are connected to a third oil pipe (109). The side of the oil cavity of the transformer (101) away from the first oil pipe (104) is connected to a fourth oil pipe (111). The second oil pipe (107) and the fourth oil pipe (111) are both connected to the third oil pipe (109) on the same side. The second oil pipe (107) and the fourth oil pipe (111) are rotatably connected to a switching valve (108) on the side of the second oil pipe (107) and the fourth oil pipe (111) near the adjacent third oil pipe (109). The fourth oil pipe (111) is fixedly connected to a temperature sensor (112) for detecting oil temperature.

2. A transformer with cooling function according to claim 1, characterized in that, The height of the third oil pipe (109) on one side of the oil storage tank (110) is higher than the height of the third oil pipe (109) on the other side of the oil storage tank (110).

3. A transformer with cooling function according to claim 2, characterized in that, It also includes a motor (201), which is fixedly connected to the connecting frame (102). The output shaft of the motor (201) is fixedly connected to a crank (202). A connecting rod (203) is rotatably connected between the two switching valves (108). The crank (202) is rotatably connected to the connecting rod (203).

4. A transformer with cooling function according to claim 3, characterized in that, The temperature sensor (112) is electrically connected to the motor (201) via a controller.

5. A transformer with cooling function according to claim 4, characterized in that, It also includes a storage tube (301), which is fixedly connected to the second oil pipe (107). The storage tube (301) stores liquid that expands when heated. The connecting frame (102) is fixedly connected to a push frame (302). The push frame (302) is connected to the storage tube (301). A lifting frame (303) is slidably connected inside the push frame (302). Threaded grooves are opened on both sides of the lifting frame (303). Except for the middle one, all the other cooling channels (106) are rotatably connected to an adjustment plate (304). The adjustment plate (304) is used to block the entrance of the adjacent cooling channel (106). The adjustment plate (304) cooperates with the threaded groove of the adjacent lifting frame (303).

6. A transformer with cooling function according to claim 5, characterized in that, It also includes an annular filter frame (401), which is threaded to the first oil pipe (104).

7. A transformer with cooling function according to claim 6, characterized in that, It also includes a heat sink bracket (501), which is fixed to the corresponding oil tank (110).

8. A transformer with cooling function according to claim 7, characterized in that, One side of the heat dissipation plate frame (501) is a plate surface, which replaces the side wall of the oil storage tank (110) and is used to dissipate heat from the cooling oil in the oil storage tank (110).

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