CN213635610U - Cooling device of dry-type transformer - Google Patents

Abstract

The utility model discloses a dry-type transformer cooling device, which comprises a dry-type transformer box body, a transformer winding, a high-voltage sleeve, a low-voltage sleeve, a three-way pipe, a tubular condenser group, a calandria, a cover plate and fastening bolts, wherein the dry-type transformer box body is internally fixed with an insulating fixed block, the transformer winding is fixed in the dry-type transformer box body through the insulating fixed block, the high-voltage sleeve penetrates through the right side of the top end of the dry-type transformer, the low-voltage sleeve penetrates through the left side of the top end of the dry-type transformer, second connecting blocks are welded on two sides of the bottom of the three-way pipe, a seamless tubular is fixed in the tubular condenser, a third flange is welded on the top of the calandria, concave blocks are fixed on two sides of the cover plate, the fastening bolts penetrate through the concave blocks and the first connecting blocks, prevent that the heat from causing the high radiating effect of temperature all around poor all around the transformer.

Description

Cooling device of dry-type transformer

Technical Field

The utility model relates to a dry-type transformer technical field specifically is a dry-type transformer cooling device.

Background

The dry type transformer is widely used in the places of local illumination, high-rise buildings, airports, docks, CNC mechanical equipment and the like, the dry type transformer refers to a transformer with an iron core and a winding which are not immersed in insulating oil, the cooling mode of the dry type transformer is divided into natural air cooling and forced air cooling, the transformer can continuously run for a long time under the rated capacity during the natural air cooling, the output capacity of the transformer can be improved by 50% during the forced air cooling, the dry type transformer is suitable for intermittent overload running or emergency accident overload running, the winding and the iron core of the dry type transformer can generate heat under the action of electricity and magnetism during the running process due to the large load loss and impedance voltage amplification during the overload running and the non-economic running state, the dry type transformer can not take away the heat in time due to the unique design running mode of the dry type transformer, the self heat dissipation effect of the dry type transformer is poor, will lead to the dry-type transformer to burn out or even the serious accident of explosion, the dry-type transformer discharges out the heat that produces in the course of the work through the louvre simultaneously, cause the heat that discharges out to surround around the dry-type transformer, thereby influence and reduce the dry-type transformer radiating effect, and need contact external cold air with the dry-type transformer through the air-cooled in-process, cause like this that dust and granule that contain in the cold air enter into inside the dry-type transformer, although keep apart it through filtering the core, the long time needs the manual work to filter the core and change, so not only troublesome still increase work load.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, a dry-type transformer cooling device is provided, put forward in solving above-mentioned background art through the heat that discharges out around dry-type transformer, thereby influence and reduction dry-type transformer radiating effect, and need contact external cold air and dry-type transformer through the forced air cooling in-process, cause dust and the granule that contains in the cold air to enter into dry-type transformer inside like this, though keep apart it through filtering the core, but the long time needs the manual work to be filtered the core and is changed, so not only the trouble still increases the problem of work load.

In order to achieve the above object, the utility model provides a following technical scheme: a dry-type transformer cooling device comprises a dry-type transformer box body, a transformer winding, a high-voltage sleeve, a low-voltage sleeve, a three-way pipe, a tube type condenser group, a tube bank, a cover plate and fastening bolts, wherein an insulating fixing block is fixed inside the dry-type transformer box body, the transformer winding is fixed inside the dry-type transformer box body through the insulating fixing block, the high-voltage sleeve penetrates through the right side of the top end of the dry-type transformer box body, the high-voltage sleeve extends inside the dry-type transformer box body and is electrically connected with the right side of the top end of the transformer winding, the low-voltage sleeve penetrates through the left side of the top end of the dry-type transformer box body, the low-voltage sleeve extends inside the dry-type transformer box body and is electrically connected with the left side of the top, hanging buckles are fixedly welded on two sides of the top end of the dry-type transformer box body, an upper vent hole is formed in the top end of the dry-type transformer box body, mounting transverse steel is fixedly welded at the bottom of the dry-type transformer box body, and second connecting blocks are welded on two sides of the bottom of the three-way pipe;

a mounting bar is welded and fixed in the three-way pipe, an air suction motor is fixed at the bottom of the mounting bar, and the air suction motor is electrically connected with the low-voltage sleeve through an electric wire, the two sides of the top end of the three-way pipe are welded with first flanges, a first sealing ring is embedded and fixed in the inner ring of the first flange, seamless tubes are fixed in the tube array type condenser group, second flanges are welded and fixed on two sides of the tube array type condenser group, a second sealing ring is embedded and fixed on the inner ring of the second flange, an inlet pipe and an outlet pipe are embedded and fixed on the top end of the tube array type condenser group, the bottom of the inlet pipe and the outlet pipe penetrates through the top end of the tubular condenser group and extends into the tubular condenser group, the tubular condenser group penetrates through the second flange and the first flange through a fixing bolt, the shell and tube condenser group is fixedly connected with two sides of the three-way pipe, and the first sealing ring and the second sealing ring are connected in an extruding manner;

a third flange is welded at the top of the calandria, a third sealing ring is embedded and fixed in an inner ring of the third flange, the calandria penetrates through the third flange and the second flange through fixing bolts, the calandria is fixedly connected with the left side of the calandria condenser group, the third sealing ring is connected with the second sealing ring in an extrusion mode, the three-way pipe penetrates through a second connecting block through the fixing bolts and is fixed at the top end of the dry-type transformer box body, and the air suction motor is installed right opposite to the upper air vent;

the apron both sides are fixed with concave piece, the mounting groove has been seted up on the apron top, the mounting groove inner ring is inlayed and is fixed with sealed the pad, the apron right side is fixed with the rotating electrical machines through fixing bolt, and the rotating electrical machines output runs through the apron and extend in the apron left side, the rotating electrical machines output is fixed with the fan blade, and the rotating electrical machines passes through electric wire and low-voltage bushing electric connection, the mounting groove runs through calandria bottom with sealed the pad, and the calandria bottom is through sealed pad and apron sealing connection, the apron is installed in dry-type transformer box left side through concave piece and first connecting block, fastening bolt runs through concave piece and first connecting block, and concave piece and first connecting block pass through fastening bolt fixed connection.

Preferably, the number of the suspension fasteners is 4, and the suspension fasteners are symmetrically arranged around the center line of the dry-type transformer box body.

Preferably, the upper vent hole is rectangular in cross section.

Preferably, the tee pipe is in a T shape.

Preferably, the thickness setting range of the first sealing ring, the second sealing ring and the third sealing ring is 0.5-0.8 mm.

Preferably, the connection angle between the calandria and the shell and tube condenser is 90 degrees.

Preferably, the number of the cover plates is 2, and the cover plates are symmetrically arranged about the center line of the dry-type transformer box body.

Preferably, the distance between the topmost end of the fan blade and the bottommost end of the discharge pipe is 3-6 cm.

Preferably, the number of the fastening bolts is 4, and the fastening bolts are symmetrically arranged about the center line of the dry type transformer box body.

Compared with the prior art, the beneficial effects of the utility model are that: the cooling device of the dry-type transformer comprises a cooling device,

(1) the three-way pipe is arranged, heat generated in the working process of the dry-type transformer is absorbed into the three-way pipe through an air suction motor in the three-way pipe, so that the heat exhausted by the dry-type transformer is prevented from surrounding the periphery of the dry-type transformer, the heat dissipation effect of the dry-type transformer is poor, meanwhile, tube type condenser groups are fixed on two sides of the three-way pipe, the heat absorbed into the three-way pipe is conveyed into the tube type condenser groups through the tube type condenser groups, seamless tube arrays in the tube type condenser groups absorb the heat, and cold air which has absorbed the heat is exhausted from the left side of the tube type condenser groups;

(2) the dry-type transformer is provided with the cover plate, the cover plate and two sides of the dry-type transformer box body form a closed space, cold air passing through the exhaust pipe is driven by the fan blades to be contacted with two sides of the transformer winding again, so that the transformer winding achieves the heat dissipation and cooling effects, and meanwhile, dust and solid particles contained in external air can be prevented from entering the dry-type transformer box body, the transformer winding is contacted with the dust and the solid particles to cause that the transformer winding cannot discharge heat generated in the working process, the dry-type transformer is loaded to work, and the danger of burning or explosion is caused;

(3) the dry-type transformer box is provided with the fan blades, the rotating motor drives the fan blades to move so that cold air enters the dry-type transformer box through the left ventilation hole and the right ventilation hole, the cold air is made to be in contact with a transformer winding, the rapid cooling and radiating effect is achieved, meanwhile, the trend of heat inside the dry-type transformer box is changed through the movement of the fan blades, and therefore the heat generated in the working process of the transformer winding is completely discharged through the upper ventilation hole, so that the tubular condenser group can absorb more heat, and the cold air is converted into the cold air and is discharged inside the dry-type transformer box.

Drawings

Fig. 1 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of the three-way pipe of the present invention;

fig. 4 is a left side view structural schematic diagram of the shell and tube condenser group of the present invention;

fig. 5 is a schematic view of the front view structure of the calandria of the present invention;

FIG. 6 is a schematic view of the front cross-sectional structure of the cover plate of the present invention;

fig. 7 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.

In the figure: 1. the dry type transformer comprises a dry type transformer box body, 2, an insulating fixing block, 3, a transformer winding, 4, a high-voltage sleeve, 5, a low-voltage sleeve, 6, a first connecting block, 7, a left vent hole, 8, a right vent hole, 9, a suspension buckle, 10, an upper vent hole, 11, installation transverse steel, 12, a three-way pipe, 13, a second connecting block, 14, an installation strip, 15, an air suction motor, 16, a first flange, 17, a first sealing ring, 18, a tube type condenser group, 19, a seamless tube array, 20, a second flange, 21, a second sealing ring, 22, an inlet and outlet pipe, 23, a tube array, 24, a third flange, 25, a third sealing ring, 26, a cover plate, 27, a concave block, 28, an installation groove, 29, a sealing gasket, 30, a rotating motor, 31, a fan blade, 32 and a fastening bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a dry-type transformer cooling device, as shown in FIG. 1 and FIG. 2, an insulation fixing block 2 is fixed inside a dry-type transformer case 1, a transformer winding 3 is fixed inside the dry-type transformer case 1 through the insulation fixing block 2, a high voltage bushing 4 penetrates through the right side of the top end of the dry-type transformer case 1, the high voltage bushing 4 extends inside the dry-type transformer case 1 and is electrically connected with the right side of the top end of the transformer winding 3, a low voltage bushing 5 penetrates through the left side of the top end of the dry-type transformer case 1, the low voltage bushing 5 extends inside the dry-type transformer case 1 and is electrically connected with the left side of the top end of the transformer winding 3, a first connecting block 6 is welded and fixed on both sides of the dry-type transformer case 1, a left vent hole 7 is formed on the left side of the dry, the number of the suspension buckles 9 is 4, the suspension buckles 9 are symmetrically arranged about the central line of the dry-type transformer box body 1, the whole dry-type transformer can be conveniently lifted, installed and disassembled through the suspension buckles 9, meanwhile, the number of the suspension buckles 9 is 4, the stability of the whole dry-type transformer in the lifting process is ensured, the dry-type transformer is prevented from being inclined in the lifting process due to uneven gravity in the lifting process, the dry-type transformer falls off and damages the whole equipment of the dry-type transformer, the top end of the dry-type transformer box body 1 is provided with the upper vent hole 10, the upper vent hole 10 is rectangular in cross section, so that the dry-type transformer box body is conveniently matched and connected with the inner ring of the three-way pipe 12, the heat dissipation area is conveniently increased, heat generated in the working process of the transformer winding 3 can enter the inside of the three-way, meanwhile, the stable work of a transformer winding 3 is guaranteed, the bottom of a dry type transformer box body 1 is fixedly welded with installation transverse steel 11, two sides of the bottom of a three-way pipe 12 are welded with second connecting blocks 13, the shape of the three-way pipe 12 is T-shaped, so that the weight of the whole three-way pipe 12 is evenly distributed, the situation that the three-way pipe 12 inclines to one side due to the fact that the weight of one side of the three-way pipe 12 is too heavy is prevented, the three-way pipe 12 is convenient to install, fix and detach, meanwhile, equipment is needed by the installation of two sides of the three-way pipe 12, the whole appearance is made to be symmetrical and attractive, a mounting strip 14 is fixedly welded inside the three-way pipe 12, an air suction motor 15 is fixed at the bottom of the mounting strip 14, the air suction motor 15 is electrically connected with a low-voltage sleeve 5 through an electric wire, first flanges 16 are welded.

As shown in fig. 3, 4 and 5, seamless tubes 19 are fixed inside the tube array type condenser group 18, second flanges 20 are fixed on both sides of the tube array type condenser group 18 by welding, second sealing rings 21 are fixed on the inner rings of the second flanges 20 by embedding, an inlet and outlet tube 22 is fixed on the top end of the tube array type condenser group 18 by embedding, the bottom of the inlet and outlet tube 22 penetrates through the top end of the tube array type condenser group 18 and extends into the tube array type condenser group 18, the tube array type condenser group 18 penetrates through the second flanges 20 and the first flanges 16 by fixing bolts, the tube array type condenser group 18 is fixedly connected with both sides of the three-way pipe 12, the first sealing rings 17 and the second sealing rings 21 are connected by extrusion, a third flange 24 is welded on the top of the tube array 23, a third sealing ring 25 is fixed on the inner ring of the third flange 24 by embedding, the thickness setting ranges of the first sealing rings 17, the second sealing rings 21 and the third sealing rings 25 are 0.5-, if too big causes the sealing washer between the flange that the sealing washer thickness is too big to make the sealing washer expose in sunshine and rain for a long time, cause the sealing washer ageing, thereby can't play sealed effect, and make dust and solid particle that contain in the outside air enter into inside dry-type transformer box 1 through flange joint easily, thereby make transformer winding 3 unable normal heat dissipation, calandria 23 runs through third flange 24 and second flange 20 through fixing bolt, and calandria 23 and shell and tube condenser 18 left side fixed connection, calandria 23 and shell and tube condenser 18 angle of connection are 90, make things convenient for calandria 23 bottom and apron 26 top through connection like this, and also carry out average distribution through calandria 23 with shell and tube condenser 18 whole gravity, make shell and tube condenser 18 keep holistic stability after installing, also make the air after the cooling conveniently pass through calandria 23 and shorten whole stroke perpendicularly downwards and get into dry-type transformer box 1 inside fast through calandria 23 The three-way pipe 1 penetrates through the second connecting block 1 through a fixing bolt and is fixed at the top end of the dry-type transformer box body 1, the air suction motor 15 is installed right opposite to the upper ventilation hole 10, the concave blocks 27 are fixed on two sides of the cover plate 26, 2 cover plates 26 are arranged, the cover plates 26 are symmetrically arranged about the center line of the dry-type transformer box body 1 and are fixedly connected with two sides of the dry-type transformer box body 1 through the cover plates 26, so that a closed space is formed at the joint of the cover plate 23 and the dry-type transformer box body 1, cooled air can be prevented from being emitted into the atmosphere, and meanwhile, dust and solid particles contained in the outside air can be prevented from entering the dry-type transformer box body 1 to be contacted with the transformer winding 3, so that heat generated in the working process of the transformer winding 3 cannot be timely discharged, so that the transformer winding 3 is overloaded and static electricity is carried in the dust, if the static electricity is directly contacted with the transformer winding 3, the transformer winding 3 is directly burnt out or is short-circuited by explosion.

As shown in fig. 6 and 7, the top end of the cover plate 26 is provided with a mounting groove 2, a sealing gasket 29 is embedded and fixed in an inner ring of the mounting groove 28, a rotary motor 30 is fixed on the right side of the cover plate 26 through a fixing bolt, an output end of the rotary motor 30 penetrates through the cover plate 26 and extends to the left side of the cover plate 26, a fan blade 31 is fixed at an output end of the rotary motor 30, a distance between the topmost end of the fan blade 31 and the bottommost end of the exhaust pipe 23 is 3-6cm, if the topmost end of the fan blade 31 contacts with the bottommost end of the exhaust pipe 23 too closely, the topmost end of the fan blade 31 scratches the bottommost end of the exhaust pipe 23 in the working process, the rotating speed of the fan blade 31 is too fast in the working process, the topmost end of the fan blade 31 contacts with the bottommost end of the exhaust pipe 32 in a scratching manner, the fan blade 31 is possibly broken in, the mounting groove 28 and the sealing gasket 29 penetrate through the bottom of the exhaust pipe 23, the bottom of the exhaust pipe 23 is hermetically connected with the cover plate 26 through the sealing gasket 29, the cover plate 26 is mounted on the left side of the dry-type transformer box 1 through the concave block 27 and the first connecting block 6 in a clamping manner, the fastening bolt 32 penetrates through the concave block 27 and the first connecting block 6, the concave block 27 and the first connecting block 6 are fixedly connected through the fastening bolt 32, the fastening bolt 32 is provided with 4 fastening bolts, the fastening bolt 32 is symmetrically arranged relative to the center line of the dry-type transformer box 1, the first connecting block 6 and the cover plate 26 are fixedly connected through the fastening bolt 32, the whole gravity of the cover plate 26 after mounting is prevented from falling downwards, the concave block 27 is separated from the first connecting block 6 under the influence of the gravity, and the whole cover plate 26.

The working principle is as follows: when the dry-type transformer cooling device is used, firstly, a lifting rope penetrates through a lifting buckle 9 manually, then auxiliary equipment is started to lift the dry-type transformer to a corresponding position, when the mounting position at the bottom of a mounting transverse steel 11 is contacted, the lifting rope and the lifting buckle 9 are loosened manually at the moment, then concave blocks 27 on two sides of a cover plate 26 are connected with a first connecting block 6 in a clamping way manually, fastening bolts 32 penetrate through the concave blocks 27 and the first connecting block 6 at the moment, the cover plate 26 and two sides of a dry-type transformer box body 1 are fixed, meanwhile, a three-way pipe 12 is taken to the top end of the dry-type transformer box body 1 manually, an air suction motor 15 and a mounting strip 14 are opposite to an upper vent hole 10, then the three-way pipe 12 penetrates through a second connecting block 13 manually through fixing bolts to be fixed with the top end of the dry-type transformer box body 1, and then a second flange 20 on the left side, and the first seal ring 17 and the second seal ring 21 are in extrusion contact in the process of connecting and fixing the second flange 20 and the first flange 16, so that the second flange 20 and the first flange 16 are connected and fastened, the bottom of the calandria 23 sequentially penetrates through the mounting groove 28 and the sealing gasket 29, meanwhile, the third flange 24 and the second flange 20 are fixedly connected through bolts, and the second seal ring 21 and the third seal ring 25 are in extrusion contact in the process of fixedly connecting the third flange 24 and the second flange 20, when the whole equipment is fixed, then the high-voltage wire is conveniently connected with the high-voltage sleeve 4 and the low-voltage sleeve 5 manually, at the moment, when the dry type transformer works normally, then the air suction motor 15 and the rotating motor 30 start to work, at the same time, the rotating motor 30 drives the fan blade 31 to move, at the moment, cold air generated in the rotating process of the fan blade 31 enters the inside the dry type transformer box body 1 through, meanwhile, cold air is contacted with the transformer winding 3, heat generated in the working process of the transformer winding 3 is driven to rise towards the dry type transformer box body 1 under the convection condition of the fan blades 31, at the moment, the air suction motor 15 sucks the rising heat into the three-way pipe 12 through the upper ventilation hole 10, at the moment, the heat entering the three-way pipe 12 enters the seamless tube array 19 through two sides of the three-way pipe 12 respectively, at the moment, external air enters the tube array condenser group 18 through the inlet and outlet pipe 22, the external air is contacted with the surface of the seamless tube array 19 to absorb the heat entering the seamless tube array 19, meanwhile, the air absorbing the heat is discharged out of the tube array condenser group 18 through the inlet and outlet pipe 22 again, at the moment, cold air absorbing the heat is left in the seamless tube array 19, and then enters the cover plate 26 through the tube array 23, at this time, the fan blades 31 inside the cover plate 26 introduce cold air into the dry-type transformer tank 1 through the left vent hole 7 and the right vent hole 8, and the cold air contacts the transformer winding 3 to achieve the heat dissipation and cooling effect, which completes the whole operation, and the content not described in detail in this specification belongs to the prior art known to those skilled in the art.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides a dry-type transformer cooling device, includes dry-type transformer box (1), transformer winding (3), high-voltage bushing (4), low-voltage bushing (5), three-way pipe (12), shell and tube condenser group (18), calandria (23), apron (26) and fastening bolt (32), its characterized in that:

dry-type transformer box (1), dry-type transformer box (1) inside is fixed with insulating fixed block (2), transformer winding (3) are fixed in inside dry-type transformer box (1) through insulating fixed block (2), high-voltage bushing (4) run through dry-type transformer box (1) top right side, and high-voltage bushing (4) extend inside dry-type transformer box (1) and transformer winding (3) top right side electric connection, low-voltage bushing (5) run through dry-type transformer box (1) top left side, and low-voltage bushing (5) extend inside dry-type transformer box (1) and transformer winding (3) top left side electric connection, dry-type transformer box (1) both sides welded fastening has first connecting block (6), left ventilation hole (7) have been seted up in dry-type transformer box (1) left side, a right vent hole (8) is formed in the right side of the dry-type transformer box body (1), hanging buckles (9) are fixedly welded on two sides of the top end of the dry-type transformer box body (1), an upper vent hole (10) is formed in the top end of the dry-type transformer box body (1), and mounting transverse steel (11) is fixedly welded on the bottom of the dry-type transformer box body (1);

the three-way pipe is characterized in that second connecting blocks (13) are welded on two sides of the bottom of the three-way pipe (12), a mounting bar (14) is welded and fixed inside the three-way pipe (12), an air suction motor (15) is fixed on the bottom of the mounting bar (14), the air suction motor (15) is electrically connected with the low-voltage sleeve (5) through an electric wire, first flanges (16) are welded on two sides of the top end of the three-way pipe (12), a first sealing ring (17) is embedded and fixed on an inner ring of each first flange (16), seamless tubes (19) are fixed inside the tube type condenser group (18), second flanges (20) are welded and fixed on two sides of the tube type condenser group (18), a second sealing ring (21) is embedded and fixed on an inner ring of each second flange (20), an inlet pipe (22) and an outlet pipe (22) are embedded and fixed on the top end of the tube type condenser group (18), and the bottom of the inlet pipe (22) penetrates through the tube, the shell and tube condenser group (18) penetrates through the second flange (20) and the first flange (16) through fixing bolts, the shell and tube condenser group (18) is fixedly connected with two sides of the three-way pipe (12), and meanwhile, the first sealing ring (17) is connected with the second sealing ring (21) in an extrusion mode;

a third flange (24) is welded on the top of the calandria (23), a third sealing ring (25) is embedded and fixed on the inner ring of the third flange (24), the calandria (23) penetrates through the third flange (24) and the second flange (20) through fixing bolts, the calandria (23) is fixedly connected with the left side of the calandria condenser group (18), meanwhile, the third sealing ring (25) is connected with the second sealing ring (21) in an extrusion mode, the three-way pipe (12) penetrates through a second connecting block (13) through fixing bolts and is fixed at the top end of the dry-type transformer box body (1), and the air suction motor (15) is installed just opposite to the upper ventilation hole (10);

the utility model discloses a dry-type transformer, including apron (26), mounting groove (28) have been seted up on apron (26) top, mounting groove (28) inner ring is inlayed and is fixed with sealed pad (29), apron (26) right side is fixed with rotating electrical machines (30) through fixing bolt, and rotating electrical machines (30) output runs through apron (26) and extends in apron (26) left side, rotating electrical machines (30) output is fixed with fan blade (31), and rotating electrical machines (30) pass through electric wire and low-voltage bushing (5) electric connection, mounting groove (28) and sealed pad (29) run through calandria (23) bottom, and calandria (23) bottom is through sealed pad (29) and apron (26) sealing connection, apron (26) are installed in dry-type transformer box (1) left side through concave block (27) and first connecting block (6) block (6) block, fastening bolt (32) run through concave block (27) and first connecting block (6), and the concave block (27) and the first connecting block (6) are fixedly connected through a fastening bolt (32).

2. A dry-type transformer cooling device as claimed in claim 1, wherein: the number of the suspension fasteners (9) is 4, and the suspension fasteners (9) are symmetrically arranged relative to the central line of the dry-type transformer box body (1).

3. A dry-type transformer cooling device as claimed in claim 1, wherein: the cross section of the upper vent hole (10) is rectangular.

4. A dry-type transformer cooling device as claimed in claim 1, wherein: the three-way pipe (12) is T-shaped.

5. A dry-type transformer cooling device as claimed in claim 1, wherein: the thickness setting range of the first sealing ring (17), the second sealing ring (21) and the third sealing ring (25) is 0.5-0.8 mm.

6. A dry-type transformer cooling device as claimed in claim 1, wherein: the connection angle between the calandria (23) and the calandria condenser group (18) is 90 degrees.

7. A dry-type transformer cooling device as claimed in claim 1, wherein: the number of the cover plates (26) is 2, and the cover plates (26) are symmetrically arranged relative to the central line of the dry-type transformer box body (1).

8. A dry-type transformer cooling device as claimed in claim 1, wherein: the distance between the topmost end of the fan blade (31) and the bottommost end of the discharge pipe (23) is 3-6 cm.

9. A dry-type transformer cooling device as claimed in claim 1, wherein: the number of the fastening bolts (32) is 4, and the fastening bolts (32) are symmetrically arranged relative to the central line of the dry-type transformer box body (1).

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