CN215868899U

CN215868899U - Low-temperature-rise short-circuit-resistant dry-type transformer

Info

Publication number: CN215868899U
Application number: CN202121281992.1U
Authority: CN
Inventors: 钱国锋; 倪超; 吴江南
Original assignee: Zhejiang Detong Transformer Co ltd
Current assignee: Zhejiang Detong Transformer Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-02-18
Anticipated expiration: 2031-06-08

Abstract

The utility model discloses a low-temperature-rise short-circuit-resistant dry-type transformer, which comprises a shell; the transformer comprises a transformer body, a transformer core and a transformer core, wherein the transformer body is provided with a plurality of groups of high-voltage and low-voltage winding coils, the bottom of the transformer body is provided with a base, and the top of the transformer body is provided with a top plate; the heat dissipation mechanism comprises two mounting frames, a plurality of mounting grooves, a fan and an air guide assembly, wherein the two ends of each mounting frame are arranged along the height direction of the shell, the two mounting frames are respectively in threaded connection with the threaded rod, the mounting grooves are arranged along the length direction of the mounting frames at intervals, the fan is detachably arranged in the mounting grooves, and the air guide assembly is arranged on the mounting frames and is positioned on the air outlet side of the fan; and the air outlet side of the fan corresponds to the high-low voltage winding coil. According to the utility model, the fan is arranged on the mounting frame and reciprocates up and down along with the mounting frame, so that the high-voltage winding coil uniformly dissipates heat in the height direction, the heat dissipation effect is good, and the safety is high; and the air guide assembly is arranged to guide the airflow blown out by the fan, so that the heat dissipation range is expanded, and the heat dissipation effect is improved.

Description

Low-temperature-rise short-circuit-resistant dry-type transformer

Technical Field

The utility model belongs to the technical field of transformers, and particularly relates to a low-temperature-rise short-circuit-resistant dry-type transformer.

Background

The high-low voltage sleeve, the iron core and the winding coil of the existing dry-type transformer are always free of dust prevention and shielding measures, and are usually additionally protected by an aluminum alloy or stainless steel metal house provided with a large number of air holes, so that the dry-type transformer is large in size and poor in heat dissipation function.

In order to ensure that the temperature of the dry-type transformer cannot exceed the rated temperature during operation, a cooling fan is usually installed below the iron core coil of the dry-type transformer. Because the heating source of dry-type transformer mainly is iron core and coil, so a dry-type transformer need install a plurality of fan, this makes the production and the running cost of equipment higher, and on the other hand, the cooling fan air-out is more dispersed, and dry-type transformer's heating source is comparatively concentrated, has just so reduced the radiating effect of fan, brings the hidden danger for equipment safe operation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a low-temperature-rise short-circuit-resistant dry-type transformer with a good heat dissipation effect to overcome the defects of the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: a low temperature rise short-circuit resistant dry-type transformer comprises

A case having a door at one side;

the transformer body is provided with a plurality of groups of high-voltage and low-voltage winding coils and is arranged in the shell, the bottom of the transformer body is provided with a base, and the top of the transformer body is provided with a top plate;

the heat dissipation mechanism is arranged in the shell and positioned on one side of the transformer body, and comprises two threaded rods arranged along the height direction of the shell, a power assembly driving the threaded rods to rotate, an installation frame with two ends respectively in threaded connection with the threaded rods, a plurality of installation grooves arranged at intervals along the length direction of the installation frame, a fan detachably arranged in the installation grooves, a limiting assembly used for fixing the fan, and an air guide assembly arranged on the installation frame and positioned on the air outlet side of the fan; one end of the threaded rod is rotatably connected with the base, the other end of the threaded rod is rotatably connected with the base, and the air outlet side of the fan corresponds to the high-low voltage winding coil.

Optionally, the air guide assembly includes an air outlet which is provided on the mounting bracket and corresponds to the fan, a plurality of air guide plates of which both ends are rotatably provided on a side wall of the air outlet, a connecting sheet which is rotatably connected with end portions of the plurality of air guide plates at the same time, two guide pillars which are respectively provided at end portions of the connecting sheet and are slidably connected with the mounting bracket, a convex ring which is provided at one end of the guide pillar far away from the connecting sheet, and a first elastic member which is sleeved on the guide pillar and is located between the convex ring and the mounting bracket; the air deflectors are arranged at intervals along the height direction of the air outlet.

Optionally, a yielding groove is formed in one side, close to the connecting sheet, of the air deflector, the yielding groove is arranged along the width direction of the air deflector, and a connecting column, partially inserted into the yielding groove, is arranged on the connecting sheet.

Optionally, the limiting assembly includes limiting grooves respectively formed in the side walls of the two sides of the mounting groove, a slider arranged on the side wall of the fan and slidably connected with the limiting grooves, two positioning columns slidably penetrating through the mounting frame, an operating plate simultaneously connected with the two positioning columns, and a second elastic member sleeved on the positioning columns and located between the mounting frame and the operating plate; the positioning column part extends into the mounting groove.

Optionally, one end of the positioning column, which is far away from the operating plate, is provided with a chamfer.

Optionally, the power assembly includes a driving wheel disposed at an end of one of the threaded rods, a driven wheel disposed at an end of the other of the threaded rods, a transmission belt simultaneously connected with the driving wheel and the driven wheel, and a motor disposed on the housing, and an output shaft of the motor is connected with one of the threaded rods.

Optionally, a plurality of damping springs are arranged between the base and the shell, and a plurality of angle steels corresponding to the corners of the base are arranged on the shell.

Optionally, the roof is kept away from base one side is equipped with first engaging lug, be equipped with the second engaging lug corresponding with the engaging lug on the shell, first engaging lug and second engaging lug pass through bolted connection, be equipped with the bar hole that supplies the bolt to pass on the first engaging lug.

Optionally, a filter element is detachably connected to one side of the housing, which is away from the tank door, two sides of the filter element are respectively provided with a plurality of locking elements penetrating through the housing, one side of each locking element, which is close to the transformer body, is provided with a retaining ring, and a third elastic element is arranged between the retaining ring and the housing; the locking piece is kept away from transformer body one side and is equipped with eccentric portion, eccentric portion rotatable to with strain a piece laminating position.

Optionally, a convex part is arranged on one side of the eccentric part close to the shell, and the cross section of the convex part is conical; the filter element is provided with a groove for the convex part to be clamped in.

In conclusion, the fan is arranged on the mounting frame and reciprocates up and down along with the mounting frame, so that the high-voltage winding coil uniformly dissipates heat in the height direction, and the high-voltage winding coil has a good heat dissipation effect and high safety; and the air guide assembly is arranged to guide the airflow blown out by the fan, so that the heat dissipation range is expanded, and the heat dissipation effect is improved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective view of fig. 1 from another perspective.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a cross-sectional perspective view of fig. 3 taken along a-a.

Fig. 5 is an enlarged view at C in fig. 4.

Fig. 6 is a cross-sectional perspective view of fig. 3 taken along B-B.

Fig. 7 is a perspective view of a part of the structure of the connecting sheet and the air deflector.

Fig. 8 is an enlarged view at D in fig. 7.

Fig. 9 is a perspective view of a portion of the structure of fig. 1.

Fig. 10 is an exploded view of fig. 1.

Figure 11 is a perspective view of the locking element of figure 1.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1 to 11, a low temperature rise short-circuit-resistant dry-type transformer includes a housing 10, a transformer body 20 and a heat dissipation mechanism; a box door 11 is arranged on one side of the shell 10, the transformer body 20 is accommodated in the shell 10, the shell 10 protects the transformer body 20, the transformer body 20 is provided with a plurality of groups of high-voltage and low-voltage winding coils 21, a base 22 is arranged at the bottom of the transformer body 20, a top plate 23 is arranged at the top of the transformer body 20, and the base 22 and the top plate 23 are respectively fixed with the shell 10; the heat dissipation mechanism is arranged in the shell 10 and positioned on one side of the transformer body 20 and used for dissipating heat of the transformer body 20, and comprises a threaded rod 31, a power assembly, an installation frame 32, an installation groove 321, a fan 33, a limiting assembly and an air guide assembly; two threaded rods 31 are arranged along the height direction of the shell 10, one end of each threaded rod 31 is rotatably connected with the base 22, the other end of each threaded rod 31 is rotatably connected with the base 22, and the base 22 is matched with the top plate 23 to support the threaded rods 31; the power assembly is used for driving the threaded rod 31 to rotate; two ends of the mounting rack 32 are respectively in threaded connection with the threaded rod 31, the mounting rack 32 is horizontally arranged, and the threaded rod 31 rotates to drive the mounting rack 32 to reciprocate up and down; a plurality of mounting grooves 321 are arranged at intervals along the length direction of the mounting rack 32; the fan 33 is detachably arranged in the mounting groove 321, and the air outlet side of the fan 33 corresponds to the high-low voltage winding coil 21, so that the heat dissipation effect on the high-low voltage winding coil 21 is improved; the limiting assembly is used for fixing the fan 33; the air guide assembly is arranged on the mounting frame 32 and located on the air outlet side of the fan 33 and used for guiding air flow blown out of the fan 33, so that the heat dissipation range is enlarged, the heat dissipation effect is improved, and the safety is high.

Specifically, the air guiding assembly includes an air outlet 322, an air guiding plate 34, a connecting sheet 351, a guide post 352, a convex ring 353 and a first elastic member 36; the air outlet 322 is formed in the mounting frame 32 and corresponds to the air outlet side of the fan 33; a plurality of air deflectors 34 are arranged, the air deflectors 34 are arranged at intervals along the height direction of the air outlet 322, two ends of each air deflector 34 can be respectively and rotatably arranged on the side wall of the air outlet 322, and air flow blown out by the fan 33 is guided; the connecting sheet 351 is arranged along the height direction of the air outlet 322 and is simultaneously and rotatably connected with the end parts of the air deflectors 34, the connecting sheet 351 acts to simultaneously drive the air deflectors 34 to simultaneously rotate, and the connecting sheet 351 is positioned at one side of the rotating center of the air deflector 34, which is close to the fan 33; two guide pillars 352 are arranged at the end of the connecting sheet 351 respectively, and are integrated with the connecting sheet 351, the guide pillars 352 can be slidably inserted into the mounting frame 32, and one ends of the guide pillars 352 far away from the connecting sheet 351 respectively extend out of the mounting frame 32; the convex ring 353 is arranged at one end of the guide pillar 352, which is far away from the connecting sheet 351, and is integrated with the guide pillar 352; the first elastic element 36 is a spring, and is sleeved on the guide post 352 and located between the protruding ring 353 and the mounting frame 32. When the mounting frame 32 is positioned in the middle of the threaded rod 31, the air deflector 34 is in a horizontal state under the action of the first elastic piece 36 and the connecting piece 351; when the mounting frame 32 moves to be attached to the base 22, the guide post 352 slides towards one side of the top plate 23 relative to the mounting frame 32 under the pushing of the base 22, and then the connecting sheet 351 pushes the air deflector 34 to rotate to be in a downward inclined state; conversely, when the mounting bracket 32 moves to be attached to the top plate 23, the connecting piece 351 pushes the air deflector 34 to rotate to an upward inclined state; through setting up connection piece 351, guide pillar 352 and first elastic component 36, enlarge the diffusion scope of air current, avoid appearing the heat dissipation dead angle because of the existence of mounting bracket 32, improve the heat dispersion of transformer.

Furthermore, a yielding groove 341 is formed in one side, close to the connecting sheet 351, of the air deflector 34, the yielding groove 341 is in a strip shape and is arranged along the width direction of the air deflector 34, a connecting column 3511 is arranged on the connecting sheet 351 and partially inserted into the yielding groove 341, and the yielding groove 341 is arranged to be matched with the connecting column 3511 so as to adapt to the change of the relative position of the connecting sheet 351 and the air deflector 34 after the air deflector 34 rotates.

Specifically, the limiting assembly includes a limiting groove 41, a sliding block 42, a positioning column 43, an operating plate 44 and a second elastic member 45; the two limiting grooves 41 are respectively arranged on the side walls of the two sides of the mounting groove 321 along the height direction of the mounting groove 321, and the sliding block 42 is arranged on the side wall of the fan 33 and is in sliding connection with the limiting grooves 41; two positioning columns 43 are arranged, the two positioning columns 43 are respectively slidably arranged on the mounting frame 32 in a penetrating manner, and part of the positioning columns 43 extend into the mounting groove 321, and one end of each positioning column 43, which is far away from the operating plate 44, is provided with a chamfering part 431; the operation board 44 is connected with the two positioning columns 43 at the same time, and pulling the operation board 44 can drive the two positioning columns 43 to act at the same time, so that the operation is convenient; the second elastic element 45 is a spring, and is sleeved on the positioning column 43 and located between the mounting frame 32 and the operation plate 44; fan 33 contacts with chamfer 431 when putting into mounting groove 321, promotes reference column 43 and slides, tensile second elastic component 45, puts into when fan 33 completely, and then reference column 43 resumes initial position under the effect of second elastic component 45, and is spacing to fan 33, avoids fan 33 to rock.

Specifically, the power assembly comprises a driving wheel 51, a driven wheel 52, a transmission belt 53 and a motor 54; the driving wheel 51 is arranged at the end part of one of the threaded rods 31; the driven wheel 52 is arranged at the end part of the other threaded rod 31; the transmission belt 53 is simultaneously connected with the driving wheel 51 and the driven wheel 52, so that the driven wheel 52 and the driving wheel 51 synchronously rotate; the motor 54 is a conventional motor, and the structure thereof is not described in detail, and is mounted on the housing 10 or the top plate 23, and the output shaft thereof is connected with one of the threaded rods 31.

Further, a plurality of damping springs 61 are arranged between the base 22 and the casing 10, and the damping springs 61 play a role in buffering, so that the transformer body 20 is prevented from continuously vibrating and failing; the shell 10 is provided with a plurality of angle steels 62 corresponding to the corners of the base 22, and the angle steels 62 are arranged to limit the base 22 and prevent the transformer body 20 from vibrating and shifting.

Furthermore, a first connecting lug 231 is arranged on one side of the top plate 23 away from the base 22, a second connecting lug 12 corresponding to the connecting lug is arranged on the housing 10, and the first connecting lug 231 and the second connecting lug 12 are connected through a bolt to fix the top plate 23, so that the stability of the transformer body 20 is improved; be equipped with the bar hole 232 that supplies the bolt to pass on the first connection ear 231, set up bar hole 232, when base 22 floated along angle steel 62 direction of height, provide the buffer space, avoid the shearing collision between first connection ear 231 and the bolt.

Optionally, a filter 63 is detachably connected to one side of the casing 10 away from the box door 11, the filter 63 is a common filter screen on the market, and corresponds to the fan 33, so as to filter the gas entering the casing 10, and reduce dust accumulation on the transformer body 20; the shell 10 is provided with an installation position 13, and the installation position 13 is formed by sinking the shell 10 inwards and is used for quickly positioning the filter element 63; a plurality of locking parts 64 penetrating through the housing 10 are respectively arranged on two sides of the filtering part 63, a blocking ring 641 is arranged on one side of the locking part 64 close to the transformer body 20, a third elastic part 65 is arranged between the blocking ring 641 and the housing 10, and the third elastic part 65 is a spring and is sleeved on the locking part 64; an eccentric part 642 is arranged on one side of the locking piece 64 far away from the transformer body 20, and the eccentric part 642 can rotate to a position attached to the filter 63 to fix the filter 63; when the filter 63 needs to be replaced, the eccentric part 642 is rotated to the position staggered with the filter 63, so that the filter 63 can be taken down, and the filter is simple in structure and convenient to operate.

Furthermore, a convex part 643 is arranged on one side of the eccentric part 642 close to the shell 10, and the cross section of the convex part 643 is conical; the filter 63 is provided with a groove 631 into which the protrusion 643 can be inserted, and the protrusion 643 is matched with the groove 631, so that the eccentric part 642 is prevented from being designed by itself, and the fixing effect is improved; and the cross section of the projection 643 is tapered to facilitate the projection 643 to rotate out of the groove 631.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A low temperature rise short-circuit-resistant dry-type transformer is characterized in that: comprises that

A case having a door at one side;

2. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: the air guide assembly comprises an air outlet which is arranged on the mounting frame and corresponds to the fan, a plurality of air guide plates, connecting pieces, two guide posts, a convex ring and a first elastic piece, wherein the two ends of the air guide plates are rotatably arranged on the side wall of the air outlet; the air deflectors are arranged at intervals along the height direction of the air outlet.

3. A low temperature rise short-circuit resistant dry-type transformer according to claim 2, wherein: the air deflector is provided with a stepping down groove on one side close to the connecting sheet, the stepping down groove is arranged along the width direction of the air deflector, and the connecting sheet is provided with a connecting column partially inserted into the stepping down groove.

4. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: the limiting assembly comprises limiting grooves which are respectively formed in the side walls of the two sides of the mounting groove, a sliding block which is arranged on the side wall of the fan and is in sliding connection with the limiting grooves, two positioning columns which can be penetrated through the mounting frame in a sliding mode, an operating plate which is connected with the two positioning columns at the same time, and a second elastic piece which is sleeved on the positioning columns and is located between the mounting frame and the operating plate; the positioning column part extends into the mounting groove.

5. A low temperature rise short-circuit resistant dry-type transformer according to claim 4, wherein: and one end of the positioning column, which is far away from the operating plate, is provided with a chamfer part.

6. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: the power assembly comprises a driving wheel arranged at the end part of one of the threaded rods, a driven wheel arranged at the end part of the other threaded rod, a transmission belt simultaneously connected with the driving wheel and the driven wheel, and a motor arranged on the shell, wherein an output shaft of the motor is connected with one of the threaded rods.

7. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: a plurality of damping springs are arranged between the base and the shell, and a plurality of angle steels corresponding to the corners of the base are arranged on the shell.

8. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: the roof is kept away from base one side is equipped with first engaging lug, be equipped with the second engaging lug corresponding with the engaging lug on the shell, first engaging lug and second engaging lug pass through bolted connection, be equipped with the bar hole that supplies the bolt to pass on the first engaging lug.

9. A low temperature rise short-circuit resistant dry-type transformer as claimed in claim 1, wherein: the side, far away from the box door, of the shell is detachably connected with a filter, a plurality of locking pieces penetrating through the shell are arranged on two sides of the filter respectively, a retaining ring is arranged on one side, close to the transformer body, of each locking piece, and a third elastic piece is arranged between each retaining ring and the shell; the locking piece is kept away from transformer body one side and is equipped with eccentric portion, eccentric portion rotatable to with strain a piece laminating position.

10. A low temperature rise short-circuit resistant dry-type transformer according to claim 9, wherein: a convex part is arranged on one side of the eccentric part close to the shell, and the section of the convex part is conical; the filter element is provided with a groove for the convex part to be clamped in.