Transformer oil temperature control device

Abstract

To provide an oil temperature control device of a transformer, which prevents the temperature of a transformer oil tank from rising excessively.SOLUTION: An oil temperature control device includes: a transformer oil tank 100 equipped with a manifold pipe bundle 200 and a heat dissipation fan 300; an air-cooling unit 400 equipped with a trachea provided in the transformer oil tank, an extension pipe provided in the trachea, a pressing member provided in the trachea and a switching member provided in the extension pipe; and a water-cooling unit 500 provided above the extension pipe and equipped with a water-cooled pipe provided inside the transformer oil tank, a cooling water tank provided outside the transformer oil tank, a discharge pipe provided in the cooling water tank, a connecting pipe provided between the discharge pipe and the water-cooled pipe, a drain pipe provided in the water-cooled pipe, a valve member provided in the drain pipe, and a pressure-reducing member provided in the valve member. By using the air-cooling unit and the water-cooling unit in combination, heat can be quickly dissipated when a temperature in the transformer oil tank rises excessively.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006] ,

[0001] The present invention relates to the technical field of transformer oil temperature control, and particularly to a transformer oil temperature control device.

Background Art

[0002] A transformer is an important and indispensable power facility in the power grid, playing an important role in voltage regulation of the power grid.

[0003] Currently, most of the transformers operating in the power grid are still oil-immersed transformers. Oil-immersed transformers generate core losses and winding losses during use, and these losses cause the temperature of the transformer oil to rise. To ensure the safe and reliable operation of the transformer, it is necessary to limit the winding temperature, core temperature, and the temperature of the transformer oil within a safe range. Therefore, it is necessary to cool the transformer. Ordinary oil-immersed transformers cool the internal transformer oil by heat sinks installed around the transformer. However, since heat sinks are greatly affected by the environment, when the environmental temperature is high, the expected heat dissipation effect cannot be obtained, which may cause serious failures of the transformer. For example, excessive oil temperature may lead to a decrease in the insulation performance of the transformer oil, aging of the coil, and even accidents such as ignition and explosion of the transformer. Therefore, it is necessary to improve these problems.

Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly describe some preferred embodiments. In this part, the abstract of the present application, and the title of the invention, simplification or omission can be made to avoid obscuring the purpose, and such simplification or omission is not used to limit the scope of the present invention.

[0005] In view of the problem that the cooling and heat dissipation effect of the internal transformer oil relying on the heat sink installed around the transformer is insufficient in the above description or the prior art, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a transformer oil temperature control device.

[0007] To solve the above technical problems, the present invention provides the following technical solution, a transformer oil temperature control device comprising a transformer oil tank, a manifold bundle pipe provided in the transformer oil tank, and a heat dissipation fan provided in the transformer oil tank, An air-cooling unit comprising a trachea provided on the transformer oil tank, an extension pipe provided on the trachea, a pressing member provided on the trachea, and a switching member provided on the extension pipe, A water cooling unit comprising a water cooling pipe provided above an extension pipe and located inside a transformer oil tank, a cooling water tank provided outside the transformer oil tank, a discharge pipe provided in the cooling water tank, a connecting pipe provided between the discharge pipe and the water cooling pipe, a drain pipe provided in the water cooling pipe, a valve member provided in the drain pipe, and a pressure reducing member provided in the valve member.

[0008] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the extension pipe is fixedly connected between the discharge pipe and the trachea, and a seal plate is provided between the extension pipe and the discharge pipe.

[0009] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the pressing member comprises an exhaust port provided in the trachea, a piston provided in the trachea, a push rod provided on the piston, and an elastic member provided between the piston and the trachea.

[0010] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the switching member comprises a pressing assembly provided on the push rod and a connecting assembly provided on the extension pipe.

[0011] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the pressing assembly comprises an expandable sleeve provided on a push rod, a push block provided on the expandable sleeve, two elastic members provided between the push block and the expandable sleeve, and a sliding groove provided on an extension pipe.

[0012] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the joint assembly comprises a rotating groove provided on an extension pipe, a rotating block provided on the rotating groove, a curved surface provided on the rotating block, a contact plate provided on the rotating block, an axial rod provided on the rotating block, a mounting bracket provided on the extension pipe, a power cord provided on the mounting bracket, a rotating casing provided on the mounting bracket, a sliding column provided on the rotating casing, an elastic member 3 provided between the sliding column and the rotating casing, a joint plate provided on the rotating casing, a fixed bracket provided on the extension pipe, a connecting plate provided on the fixed bracket, and a wire provided on the connecting plate.

[0013] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the power cord is electrically connected to the bonding plate via a rotating shaft on the rotating casing.

[0014] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the valve member comprises a slide groove provided in the discharge pipe, a conical plug provided inside the discharge pipe, a recessed groove provided at the top of the conical plug, a seal packing provided in the conical plug, a slider provided in the conical plug, a connecting ring provided inside the discharge pipe, and a connecting port provided in the connecting ring.

[0015] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the connection port between the connecting pipe and the discharge pipe is provided between the seal plate and the conical plug.

[0016] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the pressure reducing member comprises a water flow passage provided in the middle of a conical plug, a pointed body provided in the water flow passage, a seal ring provided on the pointed body, a connecting rod provided below the pointed body, a cross plate provided at the bottom of the connecting rod, a cross bracket provided in the water flow passage, and an elastic member 4 provided between the cross plate and the cross bracket.

[0017] The beneficial effects of the present invention are as follows: By using a pressing member and a switching member in combination, when the temperature of the transformer's oil tank rises excessively, the power to the cooling fan can be turned on and operated to cool the oil temperature in the manifold bundle, thereby solving the problem of insufficient heat dissipation by the heat sink. Furthermore, by using a valve member and a pressure reducing member in combination, if the oil temperature dissipation effect by activating the cooling fan is insufficient, and the oil temperature in the transformer's oil tank rises further, the push rod gradually pushes up the conical plug. As the conical plug rises, the opening between it and the connecting ring becomes larger, increasing the water flow and improving the heat dissipation efficiency of the transformer's oil tank. This solves the problem of not being able to quickly dissipate heat when the temperature in the transformer's oil tank rises excessively. [Brief explanation of the drawing]

[0018] To more clearly explain the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below. Naturally, the drawings in the following description represent only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without requiring any creative effort. [Figure 1] This is a schematic diagram showing the overall external three-dimensional structure of the transformer oil temperature control device according to the present invention. [Figure 2] This is a schematic diagram showing the three-dimensional structure of a water-cooling unit for an oil temperature control device for a transformer according to the present invention. [Figure 3] This is a schematic diagram showing the three-dimensional structure of the air-cooling unit of the transformer oil temperature control device according to the present invention. [Figure 4]It is a schematic diagram showing the three-dimensional structure of the pressing member of the oil temperature control device for a transformer according to the present invention. [Figure 5] It is a schematic diagram showing the three-dimensional structure of the switching member of the oil temperature control device for a transformer according to the present invention. [Figure 6] It is a schematic diagram showing the three-dimensional structure of the rotating block of the oil temperature control device for a transformer according to the present invention. [Figure 7] It is a schematic diagram showing the three-dimensional structure of the valve member of the oil temperature control device for a transformer according to the present invention. [Figure 8] It is a schematic diagram showing the three-dimensional structure of the pressure reducing member of the oil temperature control device for a transformer according to the present invention. [Figure 9] It is a schematic diagram showing the three-dimensional structure of the pointed body of the oil temperature control device for a transformer according to the present invention.

Embodiments for Carrying Out the Invention

[0019] In order to make the above objects, features, and advantages of the present invention clearer and easier to understand, the following will describe the specific embodiments of the present invention in detail in conjunction with the accompanying drawings of the specification.

[0020] To facilitate a complete understanding of the present invention, many specific details are described below. However, the present invention can also be implemented in other ways different from those described in this specification. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0021] Also, as used in this specification, "one embodiment" or "an embodiment" refers to specific features, structures, or characteristics that can be included in at least one embodiment of the present invention. The phrase "in one embodiment" appearing at different places in this specification does not all refer to the same embodiment, nor is it another embodiment that is separately or selectively mutually exclusive.

[0022] Furthermore, when the present invention is described in detail in conjunction with schematic diagrams and the embodiments of the present invention are described in detail, for the sake of facilitating the explanation, the cross-sectional view showing the structure of the device is partially enlarged regardless of the normal scale, and moreover, the schematic diagram is merely illustrative and does not limit the protection scope of the present invention. In actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0023] Embodiment 1 Referring to FIGS. 1 to 9, the first embodiment of the present invention provides an oil temperature control device for a transformer that can achieve the effect of lowering the temperature of the transformer oil tank 100. The oil temperature control device for the transformer includes a transformer oil tank 100 provided with a manifold bundle pipe 200 attached to the transformer oil tank 100 and a radiator fan 300 attached to the transformer oil tank 100, an air cooling unit 400 including an air pipe 401 fixedly connected to the transformer oil tank 100, an extension pipe 402 fixedly connected to the air pipe 401, a pressing member 403 attached to the air pipe 401, and a switching member 404 attached to the extension pipe 402, and a water cooling unit 500. The water cooling unit 500 is provided above the extension pipe 402 and is used to cool the transformer oil tank 100 by water cooling for heat dissipation. The water cooling unit 500 includes a water cooling pipe 501 fixedly connected to the inner wall of the transformer oil tank 100, a cooling water tank 502 attached outside the transformer oil tank 100, a discharge pipe 503 fixedly connected to the cooling water tank 502, a connection pipe 504 fixedly connected between the discharge pipe 503 and the water cooling pipe 501, a drain pipe 505 fixedly connected to the water cooling pipe 501, a valve member 506 attached to the drain pipe 505, and a pressure reducing member 507 attached to the valve member 506. Here, the discharge pipe 503, the connection pipe 504, the water cooling pipe 501 and the drain pipe 505 are connected, the outer rings of the connection pipe 504 and the drain pipe 505 are hermetically connected to the transformer oil tank 100, the extension pipe 402 is fixedly connected between the discharge pipe 503 and the air pipe 401, and a seal plate 508 is fixedly connected between the extension pipe 402 and the discharge pipe 503.

[0024] In summary, by using the air-cooling unit 400 and the water-cooling unit 500 in combination, when the temperature inside the transformer oil tank 100 rises, the air-cooling unit 400 is automatically activated to cool the transformer oil tank 100. If the temperature rises excessively and the air-cooling unit 400 cannot effectively cool the tank, the water-cooling unit 500 is automatically activated to cool it. This solves the problem of insufficient heat dissipation in conventional transformer oil tanks 100.

[0025] Example 2 Referring to Figures 1 to 6, the second embodiment of the present invention differs from the above embodiment as follows: In this embodiment, an air-cooling unit 400 is provided, comprising a tracheus 401 fixedly connected to and communicating with the transformer oil tank 100, an extension pipe 402 fixedly connected to the tracheus 401, a pressing member 403 attached to the tracheus 401, and a switching member 404 attached to the extension pipe 402. This solves the problem of insufficient heat dissipation when the oil temperature in the transformer oil tank 100 rises excessively.

[0026] The pressing member 403 comprises an exhaust port 403a opened in the trachea 401, a piston 403b slidably connected to the trachea 401, a push rod 403c fixedly connected to the piston 403b, and an elastic member 403d installed between the piston 403b and the trachea 401. As the temperature inside the transformer oil tank 100 gradually rises, the air pressure increases, and the internal pressure pushes the piston 403b up on the trachea 401, overcoming the elasticity of the elastic member 403d. When the temperature returns to normal and the air pressure stabilizes, the piston 403b gradually descends due to the thrust of the elastic member 403d.

[0027] The switching member 404 comprises a pressing assembly 404a attached to the push rod 403c and a joining assembly 404b attached to the extension pipe 402, wherein the pressing assembly 404a comprises an expandable sleeve 404a-1 fixedly connected to the push rod 403c, a push block 404a-2 slidably connected to the expandable sleeve 404a-1, an elastic member 404a-3 installed between the push block 404a-2 and the expandable sleeve 404a-1, and a sliding groove 404a-4 opened in the extension pipe 402.

[0028] Furthermore, the joint assembly 404b comprises a rotating groove 404b-1 opened in the extension pipe 402, a rotating block 404b-2 rotatably connected to the rotating groove 404b-1, a curved surface 404b-3 opened in the rotating block 404b-2, a contact plate 404b-4 fixedly connected to the rotating block 404b-2, and an axle rod 404b-5 fixedly connected to the rotating block 404b-2, wherein the rotating block 404b-2 is rotatably connected to the rotating groove 404b-1 via the axle rod 404b-5, a mounting bracket 404b-6 fixedly connected to the outer wall of the extension pipe 402, a power cord 404b-7 fixedly connected to the mounting bracket 404b-6, a rotating casing 404b-8 rotatably connected to the mounting bracket 404b-6, and a rotating casing The cooling fan 300 comprises a sliding column 404b-9 slidably connected to 404b-8, an elastic member 404b-10 mounted between the sliding column 404b-9 and the rotating casing 404b-8, a connecting plate 404b-11 fixedly connected to the tail end of the rotating casing 404b-8, a fixed bracket 404b-12 fixedly connected to the outer wall of the extension pipe 402, a connecting plate 404b-13 fixedly connected to the fixed bracket 404b-12, and a wire 404b-14 fixedly connected to the connecting plate 404b-13. Here, the power cord 404b-7 is electrically connected to the connecting plate 404b-11 via a rotating shaft on the rotating casing 404b-8, and when the connecting plate 404b-11 is joined to the connecting plate 404b-13, the cooling fan 300 is energized and starts to rotate.

[0029] During use, if the temperature inside the transformer oil tank 100 rises excessively, the air pressure inside the transformer oil tank 100 will also gradually rise. This creates thrust against the trachea 401, gradually pushing the piston 403b upward within the trachea 401 as the temperature rises. During this upward movement, the push block 404a-2 on the push rod 403c comes into contact with the rotating block 404b-2. As the push block 404a-2 gradually rises, it rotates the rotating block 404b-2 to the right, causing the sliding column 404b-9 to slide along the curved surface 404b-3 of the rotating block 404b-2 until it contacts the lower contact plate 404b-4. The rotating casing 404b-8 also rotates, and at this time, the connecting plate 404b-11 also As the rotating casing 404b-8 rotates, the push block 404a-2 rotates upward and connects with the connecting plate 404b-13. At this time, the cooling fan 300 is energized and starts rotating to cool the manifold bundle 200. As the temperature gradually returns to normal due to the cooling effect of the cooling fan 300, the piston 403b gradually returns to its original position due to the tensile force of the elastic member. As the piston 403b descends, the push block 404a-2 rotates the rotating block 404b-2 downward again. At this time, the sliding column 404b-9 comes into contact with the contact plate 404b-4 located below the rotating block 404b-2. Simultaneously, the connecting plate 404b-11 disconnects from the connecting plate 404b-13, the power to the cooling fan 300 is cut off, and it stops rotating.

[0030] In summary, by using the pressing member 403 and the switching member 404 in combination, the power to the cooling fan 300 can be turned on and operated when the temperature of the transformer oil tank 100 rises excessively to cool the oil temperature in the manifold bundle 200. When the temperature gradually returns to normal, the power is automatically turned off, thereby solving the problem of insufficient heat dissipation by the heat sink.

[0031] Example 3 Referring to Figures 7 to 9, the third embodiment of the present invention differs from the above embodiment as follows: This embodiment provides a water cooling unit 500 that solves the problem of insufficient heat dissipation when the temperature is too high. The water cooling unit 500 is provided above the extension pipe 402 and fixedly connected to the inner wall of the transformer oil tank 100, a cooling water tank 502 mounted outside the transformer oil tank 100, a discharge pipe 503 fixedly connected to the cooling water tank 502, and fixedly connected between the discharge pipe 503 and the water cooling pipe 501. The system includes a connected connecting pipe 504, a drain pipe 505 fixedly connected to the water cooling pipe 501, a valve member 506 attached to the drain pipe 505, and a pressure reducing member 507 attached to the valve member 506. Here, the discharge pipe 503, connecting pipe 504, water cooling pipe 501, and drain pipe 505 are connected, the outer rings of the connecting pipe 504 and the drain pipe 505 are sealed and connected to the transformer oil tank 100, the extension pipe 402 is fixedly connected between the discharge pipe 503 and the trachea 401, and a seal plate 508 is fixedly connected between the extension pipe 402 and the discharge pipe 503.

[0032] The valve member 506 includes a slide groove 506a fixedly connected to the discharge pipe 503, a conical plug 506b slidably connected inside the discharge pipe 503, a recessed groove 506c formed at the top of the conical plug 506b, a seal packing 506d fixedly connected to the conical plug 506b, and a slider 506e fixedly connected to the conical plug 506b, wherein the conical plug 506b is slidably connected to the slide groove 506a via the slider 506e. The conical plug 506b comprises a 506e, a connecting ring 506f fixedly connected to the inner wall of the discharge pipe 503, and a connecting port 506g opened in the connecting ring 506f. When the seal packing 506d on the conical plug 506b comes into contact with the connecting port 506g, the conical plug 506b and the connecting ring 506f become completely sealed, preventing water flow from passing through. The connecting port between the connecting pipe 504 and the discharge pipe 503 is provided between the seal plate 508 and the conical plug 506b.

[0033] The pressure reducing member 507 comprises a water flow passage 507a opened in the middle of a conical plug 506b, a pointed body 507b slidably connected to the top of the water flow passage 507a, a seal ring 507c fixedly connected to the pointed body 507b, a connecting rod 507d fixedly connected below the pointed body 507b, a cross plate 507e fixedly connected to the bottom of the connecting rod 507d, and a cross bracket 507f fixedly connected to the water flow passage 507a, wherein the connecting rod 507d is slidably connected to the cross bracket 507f, and an elastic member 4 507g fixedly connected between the cross plate 507e and the cross bracket 507f. When no external force is applied, the pointed body 507b maintains a sealed state with the water flow passage 507a due to the downward thrust of the elastic member 4 507g.

[0034] If, during use, the oil temperature dissipation effect from the cooling fan 300 is insufficient, and the oil temperature in the transformer oil tank 100 rises further, the piston 403b will be subjected to higher pressure, causing the push rod 403c to rise further. When the push rod 403c pushes up the cross plate 507e in the water flow passage 507a, the pointed body 507b is pushed out of the water flow passage 507a. At this time, some of the water flow flows out of the water flow passage 507a and into the water cooling pipe 501. As a result, the thrust of the water flow acting on the groove 506c at the top of the pointed body 507b becomes smaller than the thrust when the pointed body 507b is closed. At this time, the push rod 403c rises further, pushing up the entire conical plug 506b. As the air pressure increases, the amount the push rod 403c rises increases, the opening between the conical plug 506b and the connecting ring 506f becomes larger, the water flow passing through increases, and the heat dissipation efficiency of the oil temperature inside the transformer also improves.

[0035] In summary, by using the valve member 506 and the pressure reducing member 507 in combination, if the oil temperature dissipation effect by starting the heat dissipation fan 300 is insufficient, and the oil temperature in the transformer oil tank 100 rises further, the push rod 403c gradually pushes up the conical plug 506b. As the conical plug 506b rises, the opening between it and the connecting ring 506f increases, increasing the water flow and improving the heat dissipation efficiency of the transformer oil tank 100. This solves the problem of not being able to quickly dissipate heat when the temperature in the transformer oil tank 100 rises excessively.

[0036] The above-described embodiments are merely for illustrating the technical solutions of the present invention and do not limit them. While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art can modify or substitute equivalents to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and such modifications or substitutions should be included within the claims of the present invention. [Explanation of Symbols]

[0037] 100 Transformer oil tank, 200 Manifold bundle pipe, 300 Cooling fan, 400 Air cooling unit, 401 Trachea, 402 Extension pipe, 403 Pressing member, 403a Exhaust port, 403b Piston, 403c Push rod, 403d Elastic member 1, 404 Switching member, 404a Pressing assembly, 404a-1 Expandable sleeve, 404a-2 Push block, 404a-3 Elastic member 2, 404a-4 Sliding groove, 404b Joining assembly, 404b-1 Rotating groove, 404b-2 Rotating block, 404b-3 Curved surface, 404b-4 Contact plate, 404b-5 Shaft rod, 404b-6 Mounting bracket, 404b-7 Power cord, 404b-8 Rotating casing, 404b-9 Sliding column, 404b-10 Elastic member 3, 404b-11 Joining plate, 404b-12 Fixing bracket, 404b-13 Connection plate, 404b-14 Wire, 500 Water cooling unit, 501 Water cooling pipe, 502 Cooling water tank, 503 Discharge pipe, 504 Connecting pipe, 505 Drain pipe, 506 Valve member, 506a Slide groove, 506b Conical plug, 506c Recessed groove, 506d Seal packing, 506e Slider, 506f Joining ring, 506g Joint port, 507 Pressure reducing member, 507a Water flow passage, 507b Pointed body, 507c Seal ring, 507d Connecting rod, 507e Cross plate, 507f Cross bracket, 507g Elastic member 4, 508 Seal plate.

Claims

1. A transformer oil temperature control device comprising a transformer oil tank (100), a manifold bundle pipe (200) provided in the transformer oil tank (100), and a heat dissipation fan (300) provided in the transformer oil tank (100), An air-cooling unit (400) comprising a trachea (401) provided in the transformer oil tank (100), an extension pipe (402) provided in the trachea (401), a pressing member (403) provided in the trachea (401), and a switching member (404) provided in the extension pipe (402), A water cooling unit (500) comprising: a water cooling pipe (501) provided above an extension pipe (402) and located inside a transformer oil tank (100); a cooling water tank (502) provided outside the transformer oil tank (100); a discharge pipe (503) provided in the cooling water tank (502); a connecting pipe (504) provided between the discharge pipe (503) and the water cooling pipe (501); a drain pipe (505) provided in the water cooling pipe (501); a valve member (506) provided in the drain pipe (505); and a pressure reducing member (507) provided in the valve member (506), The pressing member (403) comprises an exhaust port (403a) provided in the trachea (401), a piston (403b) provided in the trachea (401), a push rod (403c) provided on the piston (403b), and an elastic member (403d) provided between the piston (403b) and the trachea (401). The switching member (404) comprises a pressing assembly (404a) provided on the push rod (403c) and a joining assembly (404b) provided on the extension pipe (402). The valve member (506) comprises a slide groove (506a) provided in the discharge pipe (503), a conical plug (506b) provided inside the discharge pipe (503), a recessed groove (506c) provided at the top of the conical plug (506b), a seal packing (506d) provided on the conical plug (506b), a slider (506e) provided on the conical plug (506b), a connecting ring (506f) provided inside the discharge pipe (503), and a connecting port (506g) provided on the connecting ring (506f). The connection port between the connecting pipe (504) and the discharge pipe (503) is provided between the seal plate (508) and the conical plug (506b). The pressure reducing member (507) comprises a water flow passage (507a) provided in the middle of a conical plug (506b), a pointed body (507b) provided in the water flow passage (507a), a seal ring (507c) provided on the pointed body (507b), a connecting rod (507d) provided below the pointed body (507b), a cross plate (507e) provided at the bottom of the connecting rod (507d), a cross bracket (507f) provided in the water flow passage (507a), and an elastic member 4 (507g) provided between the cross plate (507e) and the cross bracket (507f). The extension pipe (402) is fixedly connected between the discharge pipe (503) and the trachea (401), and a seal plate (508) is fixedly connected between the extension pipe (402) and the discharge pipe (503). By using the pressing member (403) and the switching member (404) in combination, when the temperature of the transformer oil tank (100) rises excessively, the power to the cooling fan (300) is turned on and operated to cool the oil temperature in the current distribution tube (200), and when the temperature gradually returns to normal, the power is automatically turned off, thereby solving the problem of insufficient heat dissipation effect of the heat dissipation piece. A transformer oil temperature control device is characterized by using a valve member (506) and a pressure reducing member (507) in combination, so that if the heat dissipation effect of the oil temperature is insufficient even when the heat dissipation fan (300) is started and the oil temperature in the transformer oil tank (100) continues to rise, the push rod (403c) further gradually pushes up the conical plug (506b), and as the conical plug (506b) rises, the opening between it and the contact ring (506f) becomes larger, the water flow also becomes larger, and the heat dissipation efficiency of the transformer oil tank (100) becomes higher, thereby solving the problem of not being able to dissipate heat in a timely manner when the temperature in the transformer oil tank (100) rises excessively.

2. The oil temperature control device for a transformer according to claim 1, characterized in that the pressing assembly (404a) comprises an expandable sleeve (404a-1) provided on a push rod (403c), a push block (404a-2) provided on the expandable sleeve (404a-1), an elastic member 2 (404a-3) provided between the push block (404a-2) and the expandable sleeve (404a-1), and a sliding groove (404a-4) provided on an extension pipe (402).

3. The connecting assembly (404b) includes a rotating groove (404b-1) provided on the extension pipe (402), a rotating block (404b-2) provided on the rotating groove (404b-1), a curved surface (404b-3) provided on the rotating block (404b-2), a contact plate (404b-4) provided on the rotating block (404b-2), an axial rod (404b-5) provided on the rotating block (404b-2), a mounting bracket (404b-6) provided on the extension pipe (402), a power cord (404b-7) provided on the mounting bracket (404b-6), and a rotating casing provided on the mounting bracket (404b-6). An oil temperature control device for a transformer according to claim 2, characterized by comprising: 404b-8), a sliding column (404b-9) provided on the rotating casing (404b-8), an elastic member three (404b-10) provided between the sliding column (404b-9) and the rotating casing (404b-8), a connecting plate (404b-11) provided on the rotating casing (404b-8), a fixing bracket (404b-12) provided on the extension pipe (402), a connecting plate (404b-13) provided on the fixing bracket (404b-12), and a wire (404b-14) provided on the connecting plate (404b-13).

4. The transformer oil temperature control device according to claim 3, characterized in that the power cord (404b-7) is electrically connected to the connecting plate (404b-11) via a rotating shaft on the rotating casing (404b-8).

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