A transformer assembly for power distribution network security risk isolation

Abstract

The application relates to the technical field of power equipment, and discloses a transformer assembly for power distribution network safety risk isolation, in order to solve the problems of insufficient heat dissipation performance and safety performance of a transformer, a heat dissipation fin is arranged on a transformer box to realize external heat dissipation of the transformer box; moreover, an internal heat dissipation coil arranged in the transformer box is connected in communication with an external heat dissipation coil, liquid in the external heat dissipation coil is circulated in the transformer box, internal heat dissipation is realized, and finally the effect of internal and external circulation heat dissipation is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, and particularly relates to a transformer assembly for isolating safety risks of a power distribution network. BACKGROUND

[0002] As a kind of key electrical equipment, the core function of transformer is to realize the change of alternating voltage, current and impedance by using electromagnetic induction principle, and it occupies an irreplaceable core position in the whole process of power transmission, distribution and use.

[0003] In the current technical application scene, in order to effectively prevent the temperature inside the transformer from being too high and ensure that it can run safely and stably, the external heat dissipation fin is generally used to promote heat exchange. However, this heat dissipation method has obvious limitations. The position and volume of the heat dissipation fin determine the heat dissipation effect to a great extent. Since the heat dissipation fin is usually installed on the outside of the transformer, the heat dissipation process is mainly concentrated in the area near the outside of the transformer. This relatively concentrated heat dissipation method greatly limits the heat dissipation space, and the heat cannot be quickly and fully dissipated, which greatly reduces the heat dissipation efficiency and makes it difficult to meet the heat dissipation demand of the transformer in long-time high-load operation.

[0004] In addition, some transformers use liquid circulation heat dissipation. In theory, liquid circulation can more efficiently take away heat, but in actual application, it exposes many problems. The liquid circulation system has very strict waterproof requirements for the waterproof channel. Once the waterproof measures are not in place, liquid leakage occurs. The leaked liquid not only causes damage to the equipment and environment around the transformer, but also makes the cleaning work extremely difficult, which requires a lot of manpower, material resources and time. More seriously, the liquid gradually decreases during circulation, and it is difficult for external personnel to directly perceive the decrease of the liquid. This results in that the transformer assembly cannot be maintained and serviced in time. In order to ensure the normal operation of the transformer, regular artificial maintenance measures must be taken, which undoubtedly increases the operation and maintenance cost and workload. SUMMARY

[0005] The present application provides a transformer assembly for isolating safety risks of a power distribution network, which has the advantages of internal and external circulation heat dissipation and combined heat dissipation of air cooling and liquid cooling, to solve the problem of insufficient heat dissipation performance and safety performance of the transformer in the background technology.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: A transformer assembly for power distribution network safety risk isolation, comprising: a transformer box and a heat dissipation frame, the transformer box is provided with heat dissipation fins on the side, for external heat dissipation of the transformer box; an internal heat dissipation coil is fixedly installed at the bottom of the inside of the transformer box, an external heat dissipation coil is fixedly installed in the heat dissipation frame, and the external heat dissipation coil and the internal heat dissipation coil are communicated through a connecting pipe, and a water pump motor assembly for driving the liquid in the external heat dissipation coil is fixedly installed in the heat dissipation frame; the internal heat dissipation coil placed at the bottom of the internal cavity of the transformer box can realize safety isolation between the power distribution components and the liquid medium when leakage occurs.

[0007] Further, a heat dissipation motor is fixedly installed at the bottom of the inside of the transformer box, and an output end of the heat dissipation motor is fixedly installed with an internal heat dissipation fan blade.

[0008] Further, an output end of the external heat dissipation coil is movably installed with an alarm piston pushed by a spring, and a connecting arm is fixedly installed on the alarm piston, and a bell is fixedly installed on the connecting arm on one side of the external heat dissipation fan blade.

[0009] Further, an output end of the heat dissipation motor is fixedly installed with a gear, a gear rack is fixedly installed on the side of the heat dissipation fin and engaged with the gear for transmission, and a tension spring is arranged between the heat dissipation fins.

[0010] Further, a detection cylinder communicating with the internal cavity of the transformer box is threadedly connected to the top of the outside of the transformer box, a detection piston pushed by a spring is movably sleeved in the inside of the detection cylinder, and a detection switch is fixedly installed on the side of the detection cylinder.

[0011] Further, an adjusting slide is movably installed in the inside of the transformer box, an adjusting top rod is fixedly installed on the top of the adjusting slide, an inclined part is formed in the top corner of the heat dissipation fin, and when the inclined part contacts the adjusting top rod, the inclined surface of the inclined part can push the adjusting top rod to have a tendency to move upward.

[0012] Further, the in-place switch fixedly installed in the inside of the transformer box is touched by the adjusting slide, an electric signal is generated and transmitted to the controller.

[0013] Further, an oil discharge pipe extending from the side of the transformer box is communicated on the path of the internal heat dissipation coil, and a valve for on-off of the inside of the oil discharge pipe is installed on the conveying path of the oil discharge pipe.

[0014] Further, the bottom of the adjusting slide is in "L" shape.

[0015] The present application has the following beneficial effects:

[0016] The application provides a transformer assembly for power distribution network safety risk isolation, which adopts an internal-external double-circulation heat dissipation mode.

[0017] Moreover, the transformer tank is internally provided with an internal heat dissipation coil pipe, which is connected with an external external heat dissipation coil pipe to form a complete liquid circulation heat dissipation channel. In the channel, the liquid in the external heat dissipation coil pipe continuously flows into the internal heat dissipation coil pipe in the transformer tank under the action of a circulating pump. During the flow of the liquid in the internal heat dissipation coil pipe, the liquid absorbs heat generated in the transformer tank to increase the temperature of the liquid. Then, the heated liquid flows back to the external heat dissipation coil pipe to exchange heat with the external environment, dissipate the heat, and reduce the temperature, and then reenters the transformer tank, so as to realize heat dissipation in the transformer tank. Through the internal-external circulation combination, the heat in the transformer tank and the external heat can be quickly and effectively dissipated, so that the transformer is always in an appropriate working temperature range, and the heat dissipation efficiency and operation stability of the transformer are greatly improved.

[0018] While realizing efficient heat dissipation, the application also fully considers the safety of the transformer during operation. The internal heat dissipation coil pipe is placed at the bottom of the internal cavity of the transformer tank, which not only fully utilizes the space in the transformer tank, but also provides convenience for subsequent safety protection measures. In order to enhance the heat exchange effect and realize continuous cooling of the transformer tank, the application is provided with an internal heat dissipation fan blade near the internal heat dissipation coil pipe. When the transformer operates, the internal heat dissipation fan blade starts to rotate under the drive of the motor to form a strong airflow. The airflow can accelerate the flow of air around the internal heat dissipation coil pipe, so that the liquid in the internal heat dissipation coil pipe and the air in the transformer tank can exchange heat more fully, so as to further improve the heat dissipation efficiency and ensure that the temperature in the transformer tank is always within a safe range.

[0019] However, in actual operation, any device has a certain risk of failure, in order to deal with the possible leakage problem, the present application carries out safety design. If the built-in heat dissipation coil pipe leaks, the leaked liquid will flow to the bottom of the transformer box inner cavity due to the action of gravity. Because the inside of the transformer box is reasonably laid out and designed for protection, the leaked liquid will not directly contact the electrical components inside the transformer box. In this way, even if liquid leakage occurs, it will not cause short circuit, damage and other safety risks to the power distribution components inside the transformer box, realizing the safety risk isolation of the power distribution components inside the transformer box. At the same time, this design also effectively avoids the damage to the equipment and environment caused by liquid leakage, reduces the probability and loss degree of accidents, and provides a strong guarantee for the safe and stable operation of the power distribution network. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which constitute a part of this specification, illustrate embodiments of the present disclosure and serve to explain the principles of the present disclosure.

[0021] Referring to the drawings, the present application can be more clearly understood in connection with the following detailed description, wherein:

[0022] Figure 1 It is a schematic diagram of the overall external three-dimensional structure of the present application;

[0023] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the heat dissipation frame of the present application;

[0024] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the transformer box of the present application;

[0025] Figure 4 It is a schematic diagram of the internal planar cross-sectional structure of the transformer box of the present application;

[0026] Figure 5 It is Figure 4 It is a schematic diagram of the enlarged structure of the part at E in the middle;

[0027] Figure 6 It is a schematic diagram of the position of each component of the adjusting slide and its three-dimensional structure.

[0028] In the figure: 1, transformer box; 2, heat dissipation frame; 3, connecting pipe; 4, heat dissipation fin; 400, inclined part; 401, tension spring; 5, detection cylinder; 501, detection piston; 502, detection switch; 6, external heat dissipation coil pipe; 7, water pump motor assembly; 8, external heat dissipation fan blade; 9, alarm piston; 10, connecting arm; 11, bell; 12, built-in heat dissipation coil pipe; 13, built-in heat dissipation fan blade; 130, heat dissipation motor; 14, gear; 15, gear rack; 16, adjusting slide; 17, adjusting top rod; 18, in-place switch; 19, valve; 20, oil drain pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0030] Embodiment one, please refer to Figure 1 As can be seen, the transformer assembly in the present application includes two parts of the transformer box 1 and the heat dissipation frame 2. In actual application, in order to realize the external heat dissipation of the transformer box 1, the heat dissipation fins 4 are arranged on the side of the transformer box 1, and the heat generated by the transformer in the operation process is conducted to the surrounding air by the heat dissipation fins 4, so as to realize the external heat dissipation of the transformer box, effectively reduce the temperature of the outer surface of the transformer box, and reduce the accumulation of heat on the surface of the box.

[0031] But this heat dissipation method has limited capacity, and due to the influence of its own volume and size, the heat dissipation area is relatively effective. In order to further enhance the heat dissipation capacity of the transformer box 1, from Figure 2 and Figure 3 As can be seen, the built-in heat dissipation coil 12 is fixedly installed on the inside bottom of the transformer box 1, and the two ends of the built-in heat dissipation coil 12 extend from the side of the transformer box 1. Correspondingly, the external heat dissipation coil 6 is fixedly installed in the heat dissipation frame 2, and the two ends of the external heat dissipation coil 6 are connected to the built-in heat dissipation coil 12 through the connecting pipe 3. The water pump motor assembly 7 for driving the liquid in the external heat dissipation coil 6 is fixedly installed in the heat dissipation frame 2, and the liquid medium is preferably insulating oil. The water pump motor assembly 7 includes a circulating pump for driving the liquid medium in the external heat dissipation coil 6 to flow and a motor for providing power, and the output shaft end of the motor is fixedly installed with the external heat dissipation fan blade 8. When the water pump motor assembly 7 drives the external heat dissipation fan blade 8 to rotate, not only the air flow is used to accelerate the heat dissipation of the liquid medium in the external heat dissipation coil 6, but also the circulating pump is used to transport the cooled liquid medium to the built-in heat dissipation coil 12, so as to reduce the temperature in the transformer box 1 and finally realize the internal heat dissipation of the transformer box 1. As can be seen, the transformer box 1 in the present application can realize internal and external synchronous heat dissipation, so as to enhance the heat dissipation efficiency. Furthermore, the length of the connecting pipe 3 is adjusted, so that the heat dissipation frame 2 is farther away from the transformer box 1, so as to further increase the actual heat dissipation space of the transformer box 1.

[0032] From the safety point of view, from Figure 4As can be seen, the built-in cooling coil 12 is arranged at the bottom of the inner cavity of the transformer box 1. If the built-in cooling coil 12 leaks during operation, the leaked liquid will flow to the bottom of the inner cavity of the transformer box 1 due to gravity and will not contact the power distribution components above, thereby achieving effective safety isolation between the cooling assembly and the power distribution assembly, avoiding the safety risks of short circuit and damage to the power distribution components inside the transformer box caused by liquid leakage, and achieving safety risk isolation of the power distribution components inside the transformer box.

[0033] On this basis, in combination with Figure 3 and Figure 4 As can be seen, the built-in cooling coil 12 is arranged at the bottom of the inner cavity of the transformer box 1. If the built-in cooling coil 12 leaks during operation, the leaked liquid will flow to the bottom of the inner cavity of the transformer box 1 due to gravity and will not contact the power distribution components above, thereby achieving effective safety isolation between the cooling assembly and the power distribution assembly, avoiding the safety risks of short circuit and damage to the power distribution components inside the transformer box caused by liquid leakage, and achieving safety risk isolation of the power distribution components inside the transformer box.

[0034] Example two is further improved on the basis of example one. During long-time operation, the liquid medium in the external cooling coil 6 will be relatively reduced due to consumption or leakage, etc. In order to facilitate the maintenance of the external operator, from Figure 2 As can be seen, the output end of the external cooling coil 6 is movably installed with an alarm piston 9 pushed by a spring, and the alarm piston 9 is fixedly installed with a connecting arm 10, and the connecting arm 10 is fixedly installed with a bell 11 located on one side of the external cooling fan 8.

[0035] Under normal circumstances, the alarm piston 9 blocks the output end of the external cooling coil 6, and the bell 11 is relatively close to the external cooling fan 8. If the external cooling fan 8 rotates at this time, the external cooling fan 8 will knock the bell 11 and force the bell 11 to make a sound.

[0036] Initially, since the cooling medium in the external cooling coil 6 is relatively sufficient, when the water pump motor assembly 7 rotates, the water pump motor assembly 7 will output the liquid medium from the output end of the external cooling coil 6 to the connecting pipe 3. At this time, the alarm piston 9 is pushed by the liquid medium, so that it compresses the spring and connects the output end of the external cooling coil 6 with the connecting pipe 3. Moreover, during the compression process of the spring by the alarm piston 9, the alarm piston 9 drives the bell 11 to move away from the external cooling fan 8 by using the connecting arm 10. Therefore, when the liquid medium in the external cooling coil 6 is sufficient, the operation of the water pump motor assembly 7 will not cause the external cooling fan 8 to contact the bell 11.

[0037] When the liquid medium in the external heat dissipation coil 6 is reduced due to leakage, the liquid medium output by the water pump motor assembly 7 is insufficient or no liquid medium is discharged. Then, the alarm piston 9 is pushed by the spring to pull the bell 11 close to the external heat dissipation fan blade 8 through the connecting arm 10. When the external heat dissipation fan blade 8 and the bell 11 contact, the sound generated by the impact between the two can alert the operator.

[0038] Example three is further improved on the basis of examples one and two. Example three can be used alone or in combination with the content described in example two. Please refer to Figure 3 As can be seen, the output end of the heat dissipation motor 130 is fixedly installed with a gear 14. Correspondingly, the side of the heat dissipation fins 4 movably installed on both sides of the transformer box 1 is fixedly installed with a gear rack 15 engaged with the gear 14 for transmission. Moreover, a tension spring 401 is arranged between the two heat dissipation fins 4, and the two heat dissipation fins 4 are forced to always have a tendency to approach each other under the tension of the tension spring 401.

[0039] In actual application, according to Figure 3 As shown, when the heat dissipation motor 130 drives the gear 14 to rotate clockwise, the two heat dissipation fins 4 are forced to relatively move away from each other and stretch the tension spring 401 according to the transmission between the gear 14 and the gear rack 15. During this process, the heat dissipation fins 4 always have a tendency to relatively approach each other under the traction of the tension spring 401. Therefore, when the gear 14 and the gear rack 15 disengage, the two heat dissipation fins 4 relatively approach each other and make the gear rack 15 impact the next outer tooth of the gear 14, so that the heat dissipation fins 4 not only release the heat inside the transformer box 1 to the outside during the extension, but also constantly shake according to the heat dissipation fins 4, so as to avoid the accumulation of dust on the heat dissipation fins 4, thereby reducing the influence of the accumulated dust on the heat dissipation efficiency.

[0040] Secondly, after working for a set time, the set time can be adjusted by a controller, such as a programmable controller. After the heat dissipation motor 130 works for a set time, it will rotate reversely, thereby driving the gear 14 to rotate reversely. Then, according to the engagement transmission between the gear 14 and the gear rack 15 and the tension of the tension spring 401, the two heat dissipation fins 4 will approach each other. According to the relative sliding between the heat dissipation fins 4 and the outer side of the transformer box 1, the dust accumulated on the outer side of the heat dissipation fins 4 can be removed by the scraping of the outer side of the transformer box 1, so as to avoid the accumulation of dust on the outer side of the heat dissipation fins 4.

[0041] Finally, according to the clockwise forward rotation of the heat dissipation motor 130 again, the heat dissipation fins 4 relatively move away from each other according to the engagement transmission between the gear 14 and the gear rack 15, thereby realizing the heat dissipation of the internal chamber of the transformer box 1 again.

[0042] In addition to example three, on the basis of example three, in order to detect the sealing of the transformer box 1, avoid the dust and other impurities in the external environment from damaging the power distribution components in the transformer box 1 due to the communication between the transformer box 1 and the external environment. Combined with Figure 4 And Figure 5 It can be seen that the transformer box 1 is externally threaded on the top of the detection cylinder 5 which is communicated with the inner cavity of the transformer box 1, and the detection piston 501 is movably sleeved in the detection cylinder 5 and is pushed by the spring. The detection switch 502 is fixedly installed on the side of the detection cylinder 5, and the detection piston 501 is pushed by the spring, so that it is relatively far away from the detection switch 502. When the dust on the outside of the heat dissipation fin 4 is cleaned according to the content described in example three, the heat dissipation fin 4 is retracted into the inside of the transformer box 1, which will cause the actual relative reduction of the inner cavity of the transformer box 1. However, the total amount of air in the inner cavity of the transformer box 1 is unchanged at this time, and if there is no leakage, the air pressure in the transformer box 1 will increase and push the detection piston 501 to compress the spring during the retraction of the heat dissipation fin 4 into the transformer box 1, until the detection piston 501 abuts against the detection switch 502, and the detection switch 502 sends an electrical signal to the controller, so as to know that the sealing of the transformer box 1 is relatively good. On the contrary, if the transformer box 1 leaks, when the heat dissipation fin 4 is retracted, the air flow in the inner cavity of the transformer box 1 will directly flow out from the leakage position, and the detection piston 501 will not be compressed, and the detection switch 502 will not generate a signal and send it to the controller.

[0043] Moreover, in order to make the transformer box 1 easy for the operator to know after leakage, combined with Figure 4 And Figure 6 It can be seen that the adjustment slide 16 is movably installed in the transformer box 1 and moves up and down in one direction, and the adjustment top rod 17 is fixedly installed on the top of the adjustment slide 16. Correspondingly, the inclined portion 400 is formed on the top corner of the heat dissipation fin 4, and when the two heat dissipation fins 4 are close to each other and contact the adjustment top rod 17 at the inclined portion 400, the inclined surface of the inclined portion 400 can push the adjustment top rod 17 to have a tendency to move upward. At the same time, the in-place switch 18 fixed on the inside of the transformer box 1 is touched by the adjustment slide 16, which will generate an electrical signal and transmit it to the controller.

[0044] In this process, if the cavity of the transformer tank 1 is sealed well, the heat dissipation fins 4 will be retracted into the transformer tank 1 before the in-place switch 18 generates a signal, and the detection piston 501 will contact the detection switch 502, the detection switch 502 will generate a signal and transmit it to the controller. Therefore, after the in-place switch 18 generates an electrical signal, it indicates that the heat dissipation fins 4 have been relatively close and retracted into the transformer tank 1. After the controller receives the electrical signals of the detection switch 502 and the in-place switch 18, the heat dissipation motor 130 will be rotated forward again, and the heat dissipation fins 4 will be extended from the transformer tank 1 again according to the meshing between the built-in heat dissipation fan blades 13 and the gear rack 15. The extended heat dissipation fins 4 will perform heat dissipation work again. After that, when the heat dissipation motor 130 works for a set time, it will be reversed and the two heat dissipation fins 4 will be close to each other. When the heat dissipation fins 4 are retracted, the sealing of the cavity of the transformer tank 1 is detected again. If the sealing is good, when the in-place switch 18 is pressed and generates a signal, the controller will make the heat dissipation motor 130 rotate forward again, and this cycle will realize the detection of the dust removal outside the heat dissipation fins 4 and the sealing of the cavity of the transformer tank 1.

[0045] If the transformer tank 1 leaks during the process of retracting the heat dissipation fins 4 into the transformer tank 1, the built-in heat dissipation coil 12 will be connected to the oil discharge pipe 20 extending from the side of the transformer tank 1, and the valve 19 for opening and closing the inside of the oil discharge pipe 20 will be installed on the delivery path of the oil discharge pipe 20. Correspondingly, the bottom of the adjusting slide 16 is "L" shaped. Figure 3 and Figure 6 As can be seen, the path of the built-in heat dissipation coil 12 is connected to the oil discharge pipe 20 extending from the side of the transformer tank 1, and the valve 19 for opening and closing the inside of the oil discharge pipe 20 is installed on the delivery path of the oil discharge pipe 20. Correspondingly, the bottom of the adjusting slide 16 is "L" shaped. In actual application, if the inclined part 400 abuts against the adjusting top rod 17 and pushes the adjusting slide 16 upward to press the in-place switch 18 during the process of retracting the heat dissipation fins 4, the in-place switch 18 will send a signal to the controller, and the controller will not rotate the heat dissipation motor 130 forward. After that, the continuously rotating heat dissipation motor 130 will force the heat dissipation fins 4 to further close according to the meshing between the gear 14 and the gear rack 15, the inclined part 400 will push the adjusting top rod 17 to further go up, the bottom of the adjusting slide 16 will push the valve 19 to move, and the valve 19 will switch from blocking to open state. After the gear 14 moves to the outer end of the gear rack 15, the heat dissipation fins 4 will not continue to close.

[0046] Since the oil discharge pipe 20 discharges the liquid medium in the built-in heat dissipation coil 12, the liquid medium in the built-in heat dissipation coil 12 is sharply reduced. According to the content described in Example Two, due to the reduction of the liquid medium in the built-in heat dissipation coil 12, the bell 11 will move close to the external heat dissipation fan blades 8, and the external heat dissipation fan blades 8 will collide with the bell 11 and make a sound to alert the operator that the liquid medium in the external heat dissipation coil 6 and the built-in heat dissipation coil 12 is reduced, which may leak or the transformer tank 1 has a problem of poor sealing.

Claims

1. A transformer assembly for power distribution grid security risk isolation, characterized by, The utility model relates to a transformer box (1) and heat dissipation frame (2), transformer box (1) side is provided with heat dissipation fin (4) for the external heat dissipation of transformer box, Transformer box (1) inside bottom fixed mounting has built-in heat dissipation coil pipe (12), heat dissipation frame (2) inside fixed mounting has external heat dissipation coil pipe (6), and external heat dissipation coil pipe (6) and built-in heat dissipation coil pipe (12) between according to connecting pipe (3) intercommunication, heat dissipation frame (2) inside fixed mounting has water pump motor assembly (7) for the liquid in the external heat dissipation coil pipe (6) inside drive, Built-in heat dissipation coil pipe (12) is placed in the cavity bottom of transformer box (1) can realize the safe isolation between distribution component and liquid medium when leaking, The output end of external heat dissipation coil pipe (6) movably installs the alarm piston (9) pushed by spring, and the alarm piston (9) is fixedly installed with the connecting arm (10) on it, and the connecting arm (10) is fixedly installed with the bell (11) on one side of external heat dissipation fan blade (8), The outside top of transformer box (1) is screw-connected with the detection cylinder (5) communicated with the cavity of transformer box (1), and the detection cylinder (5) is movably sleeved with the detection piston (501) pushed by spring in the inside, and the detection cylinder (5) side is fixedly installed with the detection switch (502), The inside of transformer box (1) movably installs the adjusting slide (16), and the adjusting slide (16) top is fixedly installed with the adjusting top rod (17), and the top corner of heat dissipation fin (4) is provided with inclined part (400), when the inclined part (400) contacts the adjusting top rod (17), the inclined surface of inclined part (400) can push the adjusting top rod (17) to have the tendency of upward movement, The in-place switch (18) fixed in the inside of transformer box (1) is touched by the adjusting slide (16), and will generate electric signal and be transported to the controller. The inside bottom of transformer box (1) is fixedly installed with heat dissipation motor (130), and the output end of heat dissipation motor (130) is fixedly installed with built-in heat dissipation fan blade (13).

2. The power distribution grid safety risk isolation transformer assembly of claim 1, wherein, The output end of heat dissipation motor (130) is fixedly installed with gear (14), and the side of heat dissipation fin (4) is fixedly installed with gear rack (15) engaged transmission with gear (14), and the heat dissipation fin (4) is provided with tension spring (401) between.

3. The power distribution grid safety risk isolation transformer assembly of claim 1, wherein, The path of built-in heat dissipation coil pipe (12) is communicated with the oil discharge pipe (20) extending from the side of transformer box (1), and the delivery path of oil discharge pipe (20) is installed with valve (19) for the on-off of oil discharge pipe (20) inside.

4. The power distribution grid safety risk isolation transformer assembly of claim 1, wherein, The bottom of adjusting slide (16) is in the shape of L.

5. The transformer assembly for power distribution grid security risk isolation of claim 4, wherein, ​

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