CN114530305A

CN114530305A - Cooling and heat-dissipating system for mining transformer

Info

Publication number: CN114530305A
Application number: CN202210085086.7A
Authority: CN
Inventors: 苏成勇; 徐卫东; 丁鸿远
Original assignee: JIANGSU ZHONGLIAN ELECTRIC CO Ltd
Current assignee: JIANGSU ZHONGLIAN ELECTRIC CO Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-05-24

Abstract

The invention relates to a cooling and heat-dissipating system of a mining transformer, which has the technical scheme that the cooling and heat-dissipating system comprises an isolation box, wherein an internal heat exchanger is arranged inside the isolation box, an external heat exchanger is arranged outside the isolation box, a circulating pipeline is connected between the internal heat exchanger and the external heat exchanger, and a cooling box for containing cooling liquid is arranged at the lower part of the isolation box; the lower part of the cooling box is provided with an opening, the lower part of the cooling box is provided with a heat-conducting copper plate for sealing the opening of the cooling box, and the lower part of the heat-conducting copper plate is fixed with a heat-radiating graphite sheet; the external heat exchanger is immersed in the cooling liquid; compared with the traditional transformer heat dissipation device, the transformer heat dissipation device can more efficiently cool and dissipate the internal environment of the isolation box.

Description

Cooling and heat-dissipating system for mining transformer

Technical Field

The invention relates to the technical field of mining transformer devices, in particular to a cooling and heat-dissipating system for a mining transformer.

Background

The transformer is a common mine power supply device, and due to the fact that underground working conditions are complex, in order to reduce the potential safety hazard to the surroundings caused by accidents, the mining transformer is generally provided with an isolation box, and a transformer body is isolated from the external environment through the isolation box, so that the safety of the mining transformer in use is improved. Because the setting of isolation box for the heat that the vary voltage produced can't in time the efficient disperse to the surrounding environment, and then often leads to the inside high temperature of isolation box easily, thereby influences the normal work of transformer, consequently mining transformer generally need set up special cooling device, and the cooling of dispelling the heat to the isolation box inside uses the constancy of temperature of isolation box inside at certain within range.

The existing mining transformer and a cooling device thereof can refer to Chinese patent application document with application publication number CN110459383A, and disclose an energy-saving water-cooled transformer, which structurally comprises a wiring sleeve, a transformer, an oil return circulation pipeline, a support and a circulating water cooling device, wherein the circulating water cooling device consists of a water cooling tank, a heat dissipation water outlet straight pipe, an air cooling mechanism, a flow guide horizontal pipe, a circulating water pump, a water return horizontal pipe and a heat dissipation water return straight pipe. The main working principle is that an internal heat exchanger is arranged in an isolation box, an external heat exchanger is arranged outside the isolation box, and then heat exchange fluid flowing through the internal heat exchanger is utilized to absorb heat and cool the interior of the isolation box; then the external heat exchanger exchanges heat with the external air, so that the heat exchange fluid flowing through the external heat exchanger is cooled, and the heat exchange fluid keeps heat absorption and cooling capacity.

The existing mining transformer cooling device has the advantages that the external heat exchanger of the existing mining transformer cooling device is in contact with air for heat exchange, so that heat exchange fluid flowing through the external heat exchanger is cooled, the cooling efficiency of the internal environment of the isolation box is low, and particularly when the external environment temperature is high.

Disclosure of Invention

The invention aims to provide a cooling and heat-dissipating system for a mining transformer, which is characterized in that a cooling box is arranged at the lower part of an isolation box, an external heat exchanger is soaked by cooling liquid, and the cooling liquid is conducted and dissipated by large-area graphite conduction, so that the interior of the isolation box can be cooled and dissipated more efficiently compared with the existing cooling device for the mining transformer.

The technical purpose of the invention is realized by the following technical scheme: a cooling and heat dissipation system for a mining transformer comprises an isolation box, wherein an internal heat exchanger is arranged inside the isolation box, an external heat exchanger is arranged outside the isolation box, a circulating pipeline is connected between the internal heat exchanger and the external heat exchanger, and a cooling box for containing cooling liquid is arranged at the lower part of the isolation box; the lower part of the cooling box is provided with an opening, the lower part of the cooling box is provided with a heat-conducting copper plate for sealing the opening of the cooling box, and the lower part of the heat-conducting copper plate is fixed with a heat-radiating graphite sheet; the external heat exchanger is immersed in the cooling liquid.

According to the technical scheme, the cooling box is arranged at the lower part of the isolation box, the cooling liquid is injected into the cooling box, the external heat exchanger is immersed in the cooling liquid, and then the external radiator is subjected to liquid cooling, so that compared with air heat dissipation, the heat exchange fluid flowing through the external heat exchanger can be cooled more efficiently; the bottom of the cooling box is provided with a large-area heat conduction copper plate, heat absorbed by the cooling liquid is conducted to an external heat dissipation graphite sheet through the heat conduction copper plate, and the heat is dissipated to an external space through the heat dissipation graphite sheet; this side is through setting up the cooler bin in the shielded box lower part, and the rational utilization space is through carrying out the second grade liquid cooling to outside radiator to comprehensive application heat-conduction technique can be more the efficient to the inside environment of shielded box cooling heat dissipation.

Preferably, the liquid outlet end of the internal heat exchanger is provided with a quick cooler; the quick cooler comprises a heat dissipation shell and an inner cylinder positioned in the heat dissipation shell; the inner cylinder is communicated with the inner heat exchanger, and the heat dissipation shell is communicated with the outer heat exchanger; and the peripheral wall of the inner cylinder body is provided with a plurality of liquid outlet holes.

Through above-mentioned technical scheme, the inside barrel and the heat dissipation casing of rapid cooler all adopt the heat conduction material preparation to form, set the whole slenderness type into of rapid cooler to inside barrel adopts the thin wall structure with the heat dissipation casing, make the heat transfer fluid of flowing through the rapid cooler can be abundant carry out the heat transfer with inside barrel and heat dissipation casing, and make the absorbed heat of rapid cooler disperse in the external space fast, thereby accelerate the cooling of heat transfer fluid.

Preferably, the heat dissipation shell is a cylindrical body coaxially arranged with the inner cylinder, and the inner cylinder is rotatably connected with the heat dissipation shell; one end of the heat dissipation shell is provided with a driving motor for driving the inner cylinder to rotate.

Through the technical scheme, the inner barrel is driven to rotate by the driving motor, and then centrifugal force generated when the inner barrel rotates is utilized, so that heat exchange fluid entering the inner barrel is thrown out of the liquid outlet hole and then enters the heat dissipation shell, the heat exchange fluid keeps high speed and enters the heat dissipation shell in a small amount, and the heat exchange fluid has a better cooling effect.

Preferably, the outer peripheral wall of the inner cylinder body is fixed with stirring blades made of heat-conducting metal.

According to the technical scheme, the stirring blades are made of the heat-conducting metal and arranged on the peripheral wall of the inner cylinder, and then the heat-exchange fluid between the inner cylinder and the heat-dissipation shell is stirred through the stirring blades, so that convection of the heat-exchange fluid is accelerated, and the heat-exchange fluid can be dissipated more efficiently; and stirring vane adopts the heat conduction metal preparation to form, when stirring heat-exchanging fluid, carries out the heat absorption conduction cooling to heat-exchanging fluid to can dispel the heat to heat-exchanging fluid more efficiently.

Preferably, the outer peripheral wall of the heat dissipation housing fixes a plurality of housing fins arranged along the radial direction of the heat dissipation housing.

Through above-mentioned technical scheme, the periphery wall of heat dissipation casing sets up the casing fin, and then can effectively increase the heat radiating area of heat dissipation casing through the casing fin to the casing fin radially sets up along heat dissipation casing, and the heat to heat dissipation casing that can be better is dispersed.

Preferably, a plurality of annular cooling fins are fixed on the peripheral wall of the cooling box.

Through the technical scheme, the plurality of annular cooling fins are fixed on the peripheral wall of the cooling box, so that the heat dissipation area of the cooling box is increased through the annular cooling fins; and the annular radiating fin pair is favorable for the flow of surrounding air, thereby being capable of better taking away heat radiated by the cooling periphery.

Preferably, the isolation box comprises a box body and a box cover positioned at the upper part of the box body, and the box cover is detachably connected with the box body; the box cover is provided with a plurality of air inlets, and positive pressure fans are arranged at the lower parts of the box cover at the air inlets; and the box walls on the two sides of the box body are respectively provided with a plurality of air outlets.

According to the technical scheme, when the transformer works, external air flow is introduced into the box body from the upper part of the box cover under the action of the positive pressure fan, and then flows out from each air outlet position on the side wall of the box body; since the transformer is usually located in the middle of the tank, the internal heat exchanger is usually located on the side wall of the tank; the air cooling system in this scheme, inside formation by last to down at the box, by the box middle part to the box outside the air current that diverges, and then can be high-efficient good heat with the transformer divergence take the box outside to can be good cool off the heat dissipation to the transformer.

Preferably, an air outlet cover fixedly connected with the box body is arranged at the air outlet; the air outlet cover is provided with a plurality of air vents penetrating through the air outlet cover; the air inlet is provided with an air inlet cap fixedly connected with the box cover, and the side wall of the air inlet cap is provided with a plurality of air inlet holes with downward openings respectively.

According to the technical scheme, the air outlet cover and the air inlet cap are arranged, so that the air outlet and the position of the air inlet are protected, and the influence of the air inlet and the air outlet on the protection capability of the isolation box is reduced; the fresh air inlet hole of the fresh air inlet cap is arranged on the side wall of the fresh air inlet cap, and the opening of the fresh air inlet hole faces downwards, so that a larger ventilation area can be obtained on the basis that the protection capability of the isolation box is not influenced.

Preferably, the air outlet cover is detachably connected with the box body; the inner wall of the air outlet cover is provided with a positioning groove, and a dustproof filter screen detachably connected with the air outlet cover is embedded in the positioning groove.

Through the technical scheme, the dustproof filter screen is arranged between the air outlet cover and the ventilation opening, so that when the positive pressure fan does not work, dust in the external environment passes through the air outlet cover through the ventilation opening and then enters the box body; the air-out is installed through the constant head tank to dustproof filter screen, fixes a position and covers, and then when clearing up the dust, conveniently installs the location to dustproof filter screen.

Preferably, the isolation box is fixedly connected with the cooling box, and a plurality of movable casters are arranged at the bottom of the cooling box.

Through above-mentioned technical scheme, through setting up the truckle at the bottom of cooler bin, and then utilize the truckle, transformer that can convenient and fast removes.

In summary, the present invention has the following technical advantages:

1. the scheme comprehensively utilizes air cooling and liquid cooling to dissipate heat and cool the inside of the isolation box; the air inlet is arranged on the box cover, the air outlet is arranged on the box walls at two sides, and then diffused air flow from top to bottom and from the middle to two sides is formed in the isolation box, so that heat dissipated by the transformer can be efficiently taken away from the external space; through wholly immersing outside radiator in the coolant liquid, and then cooling down to outside heat exchanger to compare in traditional air heat dissipation, the heat transfer fluid that can more efficient flow through outside radiator cools down, and does not influence the inside usage space of shielded cell.

2. The cooler bin sets up the lower part at the shielded box to set up heat conduction copper and the heat dissipation graphite flake of large tracts of land in the lower part of cooler bin, the space sets up rationally, and compromise radiating effect and economic principle, through heat conduction copper large tracts of land and coolant liquid contact, carry out heat-conduction to the heat of coolant liquid, and then utilize the heat dissipation graphite flake to dispel the heat, thereby can the efficient cool down to the coolant liquid in the cooler bin.

3. The quick cooler is arranged at the liquid outlet end of the internal heat exchanger, so that when the heat exchange fluid flows out of the internal heat exchanger and flows to the external heat exchanger, the heat exchange fluid flows into the internal cylinder, the internal cylinder is driven to rotate by the driving motor, the heat exchange fluid entering the internal cylinder is thrown out of the liquid outlet hole by utilizing the centrifugal force generated when the internal cylinder rotates, and then enters the heat dissipation shell, and the heat exchange fluid keeps high speed and slightly enters the heat dissipation shell; the whole slenderness that sets to of rapid cooler to inside barrel adopts the thin wall structure with the heat dissipation casing, makes the heat transfer fluid of flowing through the rapid cooler can be abundant carry out the heat transfer with inside barrel and heat dissipation casing, and make the absorbed heat of rapid cooler disperse fast in the external space, thereby accelerate the cooling of heat transfer fluid.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a cooling and heat-dissipating system of a mining transformer.

Fig. 2 is a sectional view showing the internal structure of the isolation tank and the cooling tank.

Fig. 3 is a partially enlarged view of a in fig. 2.

Fig. 4 is a schematic structural view of the quick cooler.

Fig. 5 is a sectional view of the quick cooler.

Fig. 6 is a schematic structural view showing the installation position of the positive pressure fan.

Fig. 7 is a sectional view showing the air inlet cap.

Fig. 8 is a schematic structural view showing a mounting manner of the dust-proof screen.

Wherein, 1, an isolation box; 11. a box body; 12. a box cover; 2. a cooling tank; 21. an annular heat sink; 22. a heat-conducting copper plate; 23. a heat dissipating graphite sheet; 24. moving the caster; 3. an internal heat exchanger; 4. an external heat exchanger; 5. a circulation line; 51. a liquid pump; 6. a quick cooler; 61. a heat dissipating housing; 611. a housing heat sink; 62. an inner cylinder; 621. a liquid outlet hole; 63. a drive motor; 64. a stirring blade; 7. a positive pressure fan; 8. an air outlet cover; 81. a vent hole; 82. positioning a groove; 9. an air inlet cap; 91. an air inlet hole; 10. a dustproof filter screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b):

a cooling and heat dissipation system for a mining transformer refers to fig. 1 and comprises an isolation box 1 and a cooling box 2 fixed at the lower part of the isolation box 1. A plurality of annular fins 21 are fixed to the peripheral wall of the cooling tank 2. Four corners of the bottom of the cooling box 2 are respectively provided with a movable caster 24, and then the mining transformer is conveniently moved through the movable casters 24.

Referring to fig. 1 and 2, the isolation box 1 includes a box body 11 and a box cover 12 disposed on an upper portion of the box body 11, and the box cover 12 is fixed to the box body 11 by bolts. An internal heat exchanger 3 is arranged inside the isolation box 1, and an external heat exchanger 4 is arranged outside the isolation box 1. The two internal heat exchangers 3 are respectively arranged at two sides of the box body 11. The cooling tank 2 is provided therein with a cooling liquid in which the external heat exchanger 4 is immersed. A circulation pipeline 5 is connected between the internal heat exchanger 3 and the external heat exchanger 4, the internal heat exchanger 3 is provided with a liquid inlet end and a liquid outlet end, and the circulation pipeline 5 comprises a liquid inlet pipe communicated with the liquid inlet end of the internal heat exchanger 3 and a liquid outlet pipe communicated with the liquid outlet end. The internal heat exchanger 3 is communicated with the external heat exchanger 4 through the circulating pipeline 5, and then the heat exchange fluid can flow between the internal heat exchanger 3 and the external heat exchanger 4 mutually, so that the inside of the isolation box 1 is cooled. The liquid inlet end of the internal heat exchanger 3 is provided with a liquid pump 51, and the liquid outlet end of the internal heat exchanger 3 is provided with a quick cooler 6 for accelerating the cooling of the heat exchange fluid. By activating the liquid pump 51, the heat exchange fluid is caused to flow between the inner heat exchanger 3 and the outer heat exchanger 4 by the action of the liquid pump 51.

When the transformer works, a large amount of heat can be generated, so that the temperature inside the isolation box 1 is increased, and a large temperature difference exists between the inside and the outside of the isolation box 1. When the heat exchange fluid flows through the internal heat exchanger 3, the heat in the isolation box 1 is absorbed, so that the temperature in the isolation box 1 is reduced; when the heat exchange fluid flows through the external heat exchanger 4, the external heat exchanger 4 is cooled by the cooling liquid, so that the heat exchange fluid flowing through the external heat exchanger 4 can be efficiently cooled, and the heat exchange fluid can keep heat absorption capacity. The cooling box 2 is provided with a liquid changing port, and when the cooling liquid in the cooling box 2 cannot timely cool the external heat exchanger 4, the cooling liquid in the cooling box 2 is changed through the liquid changing port.

Referring to fig. 2 and 3, the cooling box 2 is open at the lower portion thereof, a heat-conducting copper plate 22 for closing the opening of the cooling box 2 is provided at the lower portion of the cooling box 2, and a heat-dissipating graphite sheet 23 is fixed to the lower portion of the heat-conducting copper plate 22. Through the heat conduction copper 22 that sets up large tracts of land in the lower part of cooler bin 2, and then make the coolant liquid in cooler bin 2 pass through heat conduction copper 22 can the efficient with heat conduction to the external world, and then through the high-efficient heat dissipation of heat dissipation graphite flake 23. A fan is also generally disposed at the lower portion of the cooling box 2 to accelerate cooling and heat dissipation of the heat dissipating graphite sheet 23.

Referring to fig. 1, 4 and 5, the quick cooler 6 includes a heat-radiating case 61, an inner cylinder 62 and a driving motor 63. The heat dissipation case 61 and the inner cylinder 62 are each cylindrical. The inner cylinder 62 is disposed inside the heat dissipation case 61 and is disposed coaxially with the heat dissipation case 61; the outer peripheral wall of the heat dissipating case 61 fixes a plurality of case fins 611 arranged in the radial direction of the heat dissipating case 61. Both ends of the inner cylinder 62 are rotatably mounted on the heat dissipation case 61 through bearings and seal rings fitted to the bearings. The liquid outlet pipe of the circulation pipe 5 is inserted into the inner cylinder 62, and the heat-radiating housing 61 communicates with the external heat exchanger 4. The peripheral wall of the inner cylinder 62 is provided with a plurality of liquid outlet holes 621. Stirring blades 64 made of a heat conductive metal are fixed to the outer peripheral wall of the inner cylinder 62. The stirring vanes 64 are helical vanes. The body of the driving motor 63 is fixedly connected with the heat dissipation housing 61, and the output shaft of the driving motor 63 is coaxially arranged and fixedly connected with the inner cylinder 62. The heat exchange fluid flowing out of the inner heat exchanger 3 enters the inner cylinder 62, and the inner cylinder 62 is rotated at a high speed about its axis by the driving action of the driving motor 63. Under the action of centrifugal force, the heat exchange fluid entering the inner cylinder 62 is thrown out from the liquid outlet 621 and enters the heat dissipation housing 61. And then flows out of the heat radiation case 61 by the liquid pump 51.

The length of the quick cooler 6 is longer, the cross section area is smaller, and then only less heat exchange fluid passes through the quick cooler 6 in unit time. Usually, the heat dissipation casing 61 and the inner cylinder 62 of the quick cooler 6 are made of a good heat conductor such as copper and have a thin wall thickness, so that the quick cooler 6 can absorb heat of the flowing heat exchange fluid well and dissipate the absorbed heat to the external space.

The heat transfer fluid entering the inner cylinder 62 is centrifugally oscillated in the inner cylinder 62 under the action of centrifugal force, so that a small amount of heat transfer fluid entering the inner cylinder 62 can be sufficiently contacted with the inner cylinder 62 for heat transfer. And under the action of the centrifugal force of the inner cylinder 62, the heat exchange fluid is thrown out from the liquid outlet hole 621 and enters the heat dissipation shell 61; when the inner cylinder 62 rotates, the stirring blade 64 continuously stirs and vibrates the heat transfer fluid entering the heat dissipation housing 61, and the heat transfer fluid entering the heat dissipation housing 61 can be sufficiently convected in the heat dissipation housing 61, so that the heat dissipation effect of the heat transfer fluid is further accelerated. The heat dissipation area of the heat dissipation housing 61 is further effectively increased by arranging the housing heat dissipation fins 611 outside the heat dissipation housing 61, thereby accelerating the heat dissipation effect of the heat dissipation housing 61.

Referring to fig. 1, 6 and 7, a plurality of air inlets are formed in the case cover 12, and the positive pressure fan 7 is disposed at the lower portion of the case cover 12 at the air inlets. An air outlet cover 8 fixedly connected with the box body 11 is arranged at the air outlet; the air outlet cover 8 is provided with a plurality of vent holes 81 penetrating through the air outlet cover 8; an air inlet cap 9 fixedly connected with the box cover 12 is arranged at the air inlet, and a plurality of air inlet holes 91 with downward openings are respectively arranged on the side wall of the air inlet cap 9. When the transformer works, external air flow is introduced into the box body 11 from the upper part of the box cover 12 under the action of the positive pressure fan 7, and then flows out from each air outlet position on the side wall of the box body 11; since the transformer is usually located in the middle of the tank 11, the internal heat exchanger 3 is usually located on the side wall of the tank 11; the air cooling system in this scheme, 11 inside formation by last to down at the box, by 11 middle parts of box 11 to the box 11 outside air current that diverges, and then can be high-efficient good heat with the transformer divergence take 11 outsides to the box to can be good cool off the heat dissipation to the transformer. The positive pressure fans 7 arranged inside the isolation box 1 are uniformly arranged on the box cover 12, so that the box cover 12 and the box body 11 are detached, and the positive pressure fans 7 are convenient to overhaul. The air outlet cover 8 and the air inlet cap 9 are arranged to protect the air outlet and the air inlet, so that the influence of the air inlet and the air outlet on the protection capability of the isolation box 1 is reduced; the air inlet hole 91 of the air inlet cap 9 is arranged on the side wall of the air inlet cap 9, and the opening of the air inlet hole faces downwards, so that a larger ventilation area can be obtained on the basis of not influencing the protection capability of the isolation box 1.

Referring to fig. 8, the air outlet cover 8 and the box body 11 are detachably connected by bolts. The inner wall of the air outlet cover 8 is provided with a positioning groove 82, a dustproof filter screen 10 is embedded in the positioning groove 82, and the dustproof filter screen 10 is connected with the air outlet cover 8 through screws. When the positive pressure fan is not operated, external dust enters the case 11 through the vent hole 81. Through setting up dustproof filter screen 10 at the air outlet, and then carry out the separation to the dust that gets into by air outlet department. Dustproof filter screen 10 passes through constant head tank 82, and on the lid 8 that airs was installed in the location, and then when clearing up the dust, the convenience was installed the location to dustproof filter screen 10.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a mining transformer cooling system, includes shielded box (1), shielded box (1) inside is provided with inside heat exchanger (3), the outside of shielded box (1) is provided with outside heat exchanger (4), be connected with between inside heat exchanger (3) and outside heat exchanger (4) circulation pipeline (5), its characterized in that: a cooling tank (2) for containing cooling liquid is arranged at the lower part of the isolation tank (1); the lower part of the cooling box (2) is provided with an opening, the lower part of the cooling box (2) is provided with a heat-conducting copper plate (22) used for sealing the opening of the cooling box (2), and the lower part of the heat-conducting copper plate (22) is fixed with a heat-radiating graphite sheet (23); the external heat exchanger (4) is immersed in the cooling liquid.

2. The mining transformer cooling and heat dissipating system of claim 1, wherein: a quick cooler (6) is arranged at the liquid outlet end of the internal heat exchanger (3); the quick cooler (6) comprises a heat dissipation shell (61) and an inner cylinder (62) positioned inside the heat dissipation shell (61); the inner cylinder (62) is communicated with the inner heat exchanger (3), and the heat dissipation shell (61) is communicated with the outer heat exchanger (4); the peripheral wall of the inner cylinder body (62) is provided with a plurality of liquid outlet holes (621).

3. The mining transformer cooling and heat dissipating system of claim 2, wherein: the heat dissipation shell (61) is a cylindrical body coaxial with the inner cylinder (62), and the inner cylinder (62) is rotatably connected with the heat dissipation shell (61); and one end of the heat dissipation shell (61) is provided with a driving motor (63) for driving the inner cylinder (62) to rotate.

4. The mining transformer cooling and heat dissipating system of claim 3, wherein: and stirring blades (64) made of heat-conducting metal are fixed on the peripheral wall of the inner cylinder (62).

5. The mining transformer cooling and heat dissipating system of claim 3, wherein: the outer peripheral wall of the heat dissipation housing (61) fixes a plurality of housing fins (611) arranged in the radial direction of the heat dissipation housing (61).

6. The mining transformer cooling and heat dissipating system of claim 1, wherein: the peripheral wall of the cooling box (2) is fixed with a plurality of annular cooling fins (21).

7. The mining transformer cooling and heat dissipating system according to any one of claims 1 to 6, characterized in that: the isolation box (1) comprises a box body (11) and a box cover (12) positioned on the upper part of the box body (11), and the box cover (12) is detachably connected with the box body (11); a plurality of air inlets are formed in the box cover (12), and positive pressure fans (7) are arranged at the lower parts of the box cover (12) at the air inlets; and the box walls on the two sides of the box body (11) are respectively provided with a plurality of air outlets.

8. The mining transformer cooling and heat dissipating system of claim 7, wherein: an air outlet cover (8) fixedly connected with the box body (11) is arranged at the air outlet; the air outlet cover (8) is provided with a plurality of vent holes (81) penetrating through the air outlet cover (8); the air inlet is provided with an air inlet cap (9) fixedly connected with the box cover (12), and the side wall of the air inlet cap (9) is provided with a plurality of air inlet holes (91) with downward openings.

9. The mining transformer cooling and heat dissipating system of claim 7, wherein: the air outlet cover (8) is detachably connected with the box body (11); a positioning groove (82) is formed in the inner wall of the air outlet cover (8), and a dustproof filter screen (10) detachably connected with the air outlet cover (8) is embedded in the positioning groove (82).

10. The mining transformer cooling and heat dissipating system according to claim 1, wherein: isolation box (1) and cooler bin (2) fixed connection, the bottom of cooler bin (2) is provided with a plurality of caster (24).