Oil temperature control device of transformer

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]

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

[0002] Transformers are important and essential power equipment in the power grid, and play a vital role in regulating the voltage of the power grid.

[0003] Currently, the majority of transformers operating in the power grid are still oil-immersed transformers, which generate core and winding losses during use. These losses cause the transformer oil to heat up. To ensure safe and reliable operation, the winding, core, and oil temperatures must be limited within safe limits, which necessitates cooling. Conventional oil-immersed transformers use heat sinks installed around the transformer to cool the internal oil. However, because heat sinks are highly susceptible to environmental influences, high ambient temperatures can prevent the expected heat dissipation effect, potentially resulting in serious transformer failure. For example, excessive oil temperature can lead to deterioration of the transformer oil's insulating performance, coil aging, and even accidents such as transformer fires and explosions. Therefore, these issues need to be addressed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. This section, the Abstract of the Application, and the Title of the Invention may be abbreviated or omitted to avoid obscuring the purpose, and such abbreviations or omissions shall not be used to limit the scope of the present invention.

[0005] The present invention has been proposed in view of the problem that the cooling and heat dissipation effect of the internal transformer oil is insufficient due to the heat sink installed around the transformer in the above description or the prior art.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an oil temperature control device for a transformer.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution, which is 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 including 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; A water-cooled unit is provided above an extension pipe and includes a water-cooled pipe provided within 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-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.

[0008] In a preferred embodiment of the transformer oil temperature control device according to 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 in 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 according to the present invention, the switching member comprises a pressing assembly provided on the push rod and a joint assembly provided on the extension tube.

[0011] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the pressing assembly comprises an expandable sleeve attached to the push rod, a push block attached to the expandable sleeve, an elastic member 2 provided between the push block and the expandable sleeve, and a sliding groove provided in the extension tube.

[0012] In a preferred embodiment of the transformer oil temperature control device described in the present invention, the joint assembly comprises a rotation groove provided in the extension tube, a rotation block provided in the rotation groove, a curved surface provided in the rotation block, a contact plate provided in the rotation block, an axial rod provided in the rotation block, a mounting bracket provided on the extension tube, 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 fixing bracket provided on the extension tube, a connecting plate provided on the fixing bracket, and a wire provided on the connecting plate.

[0013] In a preferred embodiment of the transformer oil temperature control device according to the present invention, the power cord is electrically connected to the joining 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 in 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 on the conical plug, a connecting ring provided in the discharge pipe, and a connecting port provided on the connecting ring.

[0015] In a preferred embodiment of the transformer oil temperature control device according to the present invention, the connection ports of the connecting pipe and the discharge pipe are 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 the conical plug, a tip provided in the water flow passage, a seal ring provided in the tip, a connecting rod provided below the tip, 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 combining the pressing member and the switching member, when the temperature of the transformer oil tank rises excessively, the cooling fan can be turned on and operated to cool the oil temperature in the manifold bundle tube, thereby solving the problem of insufficient heat dissipation effect of the heat sink; by combining the valve member and the pressure reducing member, when the oil temperature in the transformer oil tank rises further when the cooling fan's oil temperature dissipation effect is insufficient, the push rod will gradually push up the conical plug, and as the conical plug rises, the opening between the conical plug and the connecting ring will become larger, increasing the water flow and improving the heat dissipation efficiency of the transformer oil tank, thereby solving the problem of insufficient heat dissipation in the transformer oil tank when the temperature in the transformer oil tank rises excessively. [Brief explanation of the drawings]

[0018] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. It should be understood that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a schematic diagram showing the three-dimensional structure of the overall external appearance of a transformer oil temperature control device according to the present invention; [Figure 2] 1 is a schematic diagram showing the three-dimensional structure of a water-cooling unit of a transformer oil temperature control device according to the present invention; [Figure 3] 1 is a schematic diagram showing the three-dimensional structure of an air-cooling unit of a transformer oil temperature control device according to the present invention; [Figure 4]1 is a schematic diagram showing a three-dimensional structure of a pressing member of an oil temperature control device for a transformer according to the present invention. FIG. [Figure 5] 1 is a schematic diagram showing a three-dimensional structure of a switching member of an oil temperature control device for a transformer according to the present invention; [Figure 6] 1 is a schematic diagram showing the three-dimensional structure of a rotating block of a transformer oil temperature control device according to the present invention; [Figure 7] 1 is a schematic diagram showing a three-dimensional structure of a valve member of an oil temperature control device for a transformer according to the present invention; [Figure 8] 1 is a schematic diagram showing a three-dimensional structure of a pressure reducing member of an oil temperature control device for a transformer according to the present invention; [Figure 9] 1 is a schematic diagram showing the three-dimensional structure of the tip of the oil temperature control device for a transformer according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0019] In order to make the above objects, features and advantages of the present invention more clear and understandable, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification.

[0020] Numerous specific details are set forth below to facilitate a thorough understanding of the present invention; however, the present invention may be practiced in other ways than those described herein, and similar extensions may be made by those skilled in the art without departing from the spirit of the present invention, and therefore the present invention is not limited by the specific examples disclosed below.

[0021] Also, as used herein, "one embodiment" or "embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternatively mutually exclusive from other embodiments.

[0022] Furthermore, the present invention will be described in detail in conjunction with schematic drawings, and when describing the embodiments of the present invention in detail, for ease of explanation, the cross-sectional views showing the structure of the device are partially enlarged and not according to the normal scale, and the schematic drawings are merely illustrative and do not limit the scope of protection of the present invention, and should include three-dimensional spatial dimensions of length, width and depth during actual production.

[0023] Example 1 1 to 9, a first embodiment of the present invention provides a transformer oil temperature control device capable of reducing the temperature of a transformer oil tank 100, and the transformer oil temperature control device includes a transformer oil tank 100 having a manifold bundle pipe 200 attached to the transformer oil tank 100 and a heat dissipation fan 300 attached to the transformer oil tank 100, an air-cooling unit 400 having a trachea 401 fixedly connected to the transformer oil tank 100, an extension pipe 402 fixedly connected to the trachea 401, a pressing member 403 attached to the trachea 401, and a switching member 404 attached to the extension pipe 402, and a water-cooling unit 500, the water-cooling unit 500 being disposed above the extension pipe 402 and used to water-cool the transformer oil tank 100 to dissipate heat, a water-cooled unit 500 including a water-cooled pipe 501 fixedly connected to the inner wall of the transformer oil tank 100, a cooling water tank 502 attached to the outside of the transformer oil tank 100, a discharge pipe 503 fixedly connected to the cooling water tank 502, a connecting pipe 504 fixedly connected between the discharge pipe 503 and the water-cooled pipe 501, a drain pipe 505 fixedly connected to the water-cooled pipe 501, a valve member 506 attached to the drain pipe 505, and a pressure reducing member 507 attached to the valve member 506, wherein the discharge pipe 503, the connecting pipe 504, the water-cooled pipe 501 and the drain pipe 505 are connected, and the outer rings of the connecting pipe 504 and the drain pipe 505 are sealed and connected to the transformer oil tank 100, an extension pipe 402 fixedly connected between the discharge pipe 503 and the trachea 401, and a seal plate 508 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, and when the temperature rises excessively and the air-cooling unit 400 is unable to provide effective cooling, the water-cooling unit 500 is automatically activated to provide cooling, thereby solving the problem of insufficient heat dissipation effect of the conventional transformer oil tank 100.

[0025] Example 2 1 to 6, the second embodiment of the present invention differs from the above-mentioned embodiments in the following respects: in this embodiment, an air-cooling unit 400 is provided, which includes a trachea 401 fixedly connected to the transformer oil tank 100 and communicating with the transformer oil tank 100, an extension tube 402 fixedly connected to the trachea 401, a pressing member 403 attached to the trachea 401, and a switching member 404 attached to the extension tube 402, thereby solving the problem of insufficient heat dissipation effect 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 attached between the piston 403b and the trachea 401. When 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 elastic force 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 includes a pressing assembly 404a attached to the push rod 403c and a joint assembly 404b attached to the extension tube 402, wherein the pressing assembly 404a includes a telescopic sleeve 404a-1 fixedly connected to the push rod 403c, a push block 404a-2 slidably connected to the telescopic sleeve 404a-1, an elastic member 404a-3 attached between the push block 404a-2 and the telescopic sleeve 404a-1, and a sliding groove 404a-4 opened in the extension tube 402.

[0028] Furthermore, the joint assembly 404b includes a rotation groove 404b-1 formed in the extension tube 402, a rotation block 404b-2 rotatably connected to the rotation groove 404b-1, a curved surface 404b-3 formed in the rotation block 404b-2, a contact plate 404b-4 fixedly connected to the rotation block 404b-2, an axial rod 404b-5 fixedly connected to the rotation block 404b-2, and the rotation block 404b-2 is rotatably connected to the rotation groove 404b-1 via the axial rod 404b-5, a mounting bracket 404b-6 fixedly connected to the outer wall of the extension tube 402, a power cord 404b-7 fixedly connected to the mounting bracket 404b-6, a rotation casing 404b-8 rotatably connected to the mounting bracket 404b-6, and a rotation casing 404b-9. a sliding pole 404b-9 slidably connected to the rotating casing 404b-8; an elastic member 404b-10 attached between the sliding pole 404b-9 and the rotating casing 404b-8; a connecting plate 404b-11 fixedly connected to the tail of the rotating casing 404b-8; a fixing bracket 404b-12 fixedly connected to the outer wall of the extension tube 402; a connecting plate 404b-13 fixedly connected to the fixing 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 through the rotating shaft on the rotating casing 404b-8. When the connecting plate 404b-11 is connected to the connecting plate 404b-13, the heat dissipation 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, which will create a thrust on the trachea 401, gradually pushing the piston 403b up as the temperature inside the trachea 401 rises. During the rising process, the push block 404a-2 on the push rod 403c abuts against 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 on the curved surface 404b-3 of the rotating block 404b-2 until it abuts against the lower abutment plate 404b-4. The rotating casing 404b-8 will also rotate, and at this time, the connecting plate 404b-11 will also As the rotating casing 404b-8 rotates, it rotates upward and connects with the connecting plate 404b-13. At this time, the heat dissipation fan 300 is powered and starts to rotate, cooling the manifold bundle 200. As the temperature gradually returns to normal due to the cooling effect of the heat dissipation fan 300, the piston 403b gradually returns to its original position due to the pulling force of the elastic member 1. As the piston 403b descends, the push block 404a-2 rotates the rotating block 404b-2 downward again. At this time, the sliding post 404b-9 abuts against the abutment plate 404b-4 below the rotating block 404b-2. At the same time, the joining plate 404b-11 releases its connection with the connecting plate 404b-13. The heat dissipation fan 300 is then powered off and stops rotating.

[0030] In summary, 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 heat dissipation fan 300 can be turned on and operated to cool the oil temperature in the manifold bundle pipe 200, and when the temperature gradually returns to normal, the power will be automatically cut off, thereby solving the problem of insufficient heat dissipation effect of the heat sink.

[0031] Example 3 7 to 9, the third embodiment of the present invention differs from the above-mentioned embodiments in the following respects. In this embodiment, a water cooling unit 500 is provided to solve the problem of insufficient heat dissipation effect when the temperature is too high. The water cooling unit 500 includes a water cooling pipe 501 provided above the extension pipe 402 and fixedly connected to the inner wall of the transformer oil tank 100, a cooling water tank 502 attached to the outside of the transformer oil tank 100, a discharge pipe 503 fixedly connected to the cooling water tank 502, and a heat sink 504 fixedly connected between the discharge pipe 503 and the water cooling pipe 501. The transformer oil tank 100 includes a connecting pipe 504 connected to the water-cooled pipe 501, a drain pipe 505 fixedly connected to the water-cooled pipe 501, a valve member 506 attached to the drain pipe 505, and a pressure reducing member 507 attached to the valve member 506, wherein the discharge pipe 503, the connecting pipe 504, the water-cooled pipe 501 and the drain pipe 505 are connected, the outer rings of the connecting pipe 504 and the drain pipe 505 are sealedly 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 in the discharge pipe 503, a recessed groove 506c opened 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. The conical plug 506b is slidably connected to the slide groove 506a via the slider 506e. The conical plug 506b is provided with a seal plate 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 abuts against the connecting port 506g, the conical plug 506b and the connecting ring 506f are completely sealed, preventing the passage of water. The connecting port between the connecting pipe 504 and the discharge pipe 503 is located 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 the conical plug 506b, a tip 507b slidably connected to the top of the water flow passage 507a, a seal ring 507c fixedly connected to the tip 507b, a connecting rod 507d fixedly connected to the underside of the tip 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, the connecting rod 507d being 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, and when no external force is applied, the tip 507b maintains a sealed state with the water flow passage 507a due to the downward thrust of the elastic member 4 507g.

[0034] During use, if the oil temperature dissipation effect due to the operation of the heat dissipation fan 300 is insufficient, the oil temperature in the transformer oil tank 100 will rise further, and the piston 403b will be subjected to a higher air 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 tip 507b will be pushed out of the water flow passage 507a. At this time, part of the water will flow out of the water flow passage 507a and into the water cooling pipe 501. As a result, the thrust of the water flow received by the groove 506c at the top of the tip 507b is smaller than the thrust when the tip 507b is closed, and at this time the push rod 403c rises further, pushing up the entire conical plug 506b. The higher the air pressure, the greater the amount of rise of the push rod 403c, and the larger the opening between the conical plug 506b and the joining ring 506f becomes, increasing the amount of water flowing through and improving the heat dissipation efficiency of the oil temperature inside the transformer.

[0035] In summary, by using the valve member 506 and the pressure reducing member 507 in combination, when the oil temperature dissipation effect caused by the start of the heat dissipation fan 300 is insufficient, when the oil temperature in the transformer oil tank 100 further rises, the push rod 403c will gradually push up the conical plug 506b, and as the conical plug 506b rises, the opening between it and the connecting ring 506f will become larger, the water flow will increase, and the heat dissipation efficiency of the transformer oil tank 100 will also be improved, thereby solving the problem of the transformer oil tank 100 not being able to quickly dissipate heat when the temperature inside the tank rises too high.

[0036] It should be noted that the above-described embodiments are only for illustrating the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art may make modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and these modifications or substitutions should be included in the scope of the claims of the present invention. [Explanation of symbols]

[0037] 100 transformer oil tank, 200 manifold bundle pipe, 300 heat dissipation 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 expansion sleeve, 404a-2 push block, 404a-3 elastic member 2, 404a-4 sliding groove, 404b joint assembly, 404b-1 rotation groove, 404b-2 rotation block, 404b-3 curved surface, 404b-4 abutment plate, 404b-5 shaft rod, 404b-6 mounting bracket, 404b-7 power cord, 404b-8 rotation casing, 404b-9 Sliding column, 404b-10 elastic member three, 404b-11 connecting plate, 404b-12 fixing bracket, 404b-13 connecting 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 groove, 506d seal packing, 506e slider, 506f connecting ring, 506g connecting 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 four, 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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