CN113571291A

CN113571291A - Power transformer for humid environment and use method thereof

Info

Publication number: CN113571291A
Application number: CN202110844731.4A
Authority: CN
Inventors: 鲍忠田
Original assignee: Anhui Feijing Electrical Equipment Co ltd
Current assignee: Anhui Feijing Electrical Equipment Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-10-29

Abstract

The invention discloses a power transformer for a humid environment and a using method thereof, belonging to the technical field, and comprising a transformer outer shell, a transformer inner shell, an iron core and a coil, wherein the coil is wound on the iron core, the transformer inner shell is connected with a bottom plate to form a sealed inner shell, the coil and the iron core are arranged in the inner shell, the transformer outer shell is sleeved outside the inner shell, and a heat exchange channel is formed between the transformer outer shell and the inner shell. According to the power transformer for the humid environment and the using method thereof, the oil entering the oil inlet pipe can drive the sealing fan blades to rotate, the sealing fan blades drive the upper rotating shaft to synchronously rotate in the rotating process, and the upper rotating shaft drives the lower rotating shaft to rotate in the rotating process, so that the radiating pipe rotates, and the poor heat exchange efficiency caused by local overheating is avoided by utilizing the flowing of liquid.

Description

Power transformer for humid environment and use method thereof

Technical Field

The invention relates to the technical field of power transformers, in particular to a power transformer for a humid environment and a using method thereof.

Background

A transformer is a stationary electrical device used to transform ac voltage, current and transmit ac power. The electric energy transmission is realized according to the principle of electromagnetic induction. Transformers can be classified into power transformers, test transformers, instrument transformers, and transformers for special purposes, in terms of their use: the power transformer is necessary equipment for power transmission and distribution and power consumer distribution; the device is used for carrying out voltage withstand (boosting) test on electrical equipment by the test transformer; the instrument transformer is used for electrical measurement and relay protection (PT, CT) of a power distribution system; the transformer for special purposes comprises a furnace transformer for smelting, an electric welding transformer, a rectifier transformer for electrolysis, a small-sized regulating transformer and the like.

In a transformer used in a humid environment, since the ambient humidity is relatively high, the surrounding water vapor is too large, which affects the electrical components inside the transformer.

CN201220315431.3 discloses a dry-type lightning-arrest transformer, through set up the fan on the shell and cool off the transformer, the cooling effect is good, practices thrift the space, is equipped with electric heater on the shell inner wall, guarantees that the transformer can normally work under humid environment.

The following problems result:

due to the arrangement of the fan, the air flow caused by the fan needs to be communicated with the outside, so that the increase of the fan increases the rate and degree of water vapor exchange with the outside, and reduces the life.

Disclosure of Invention

The present invention is directed to a power transformer for use in a wet environment and a method of using the same to solve the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a power transformer for a humid environment comprises a transformer outer shell, a transformer inner shell, an iron core and a coil, wherein the coil is wound on the iron core, the transformer inner shell is connected with a bottom plate to form a sealed inner shell, the coil and the iron core are arranged in the inner shell, the transformer outer shell is sleeved outside the inner shell, and a heat exchange channel is formed between the transformer outer shell and the inner shell;

and the high-voltage insulating sleeve and the low-voltage insulating sleeve connected with the coil penetrate through the transformer inner shell to extend to the outside of the transformer outer shell.

Furthermore, aligned through holes are formed in the front end and the rear end of the transformer inner shell, annular grooves are formed in the outer wall of the transformer inner shell on the outer side of the through holes, and heat dissipation assemblies for sealing the through holes are embedded into the annular grooves.

Furthermore, an oil inlet pipe and an oil outlet pipe which are inserted into the heat exchange channel are connected to the transformer shell, and the oil inlet pipe and the heat dissipation assembly are connected through a transmission assembly.

Furthermore, the heat dissipation assembly comprises a front sealing plate, a rear sealing plate, a heat dissipation pipe and a spoiler, the front sealing plate and the rear sealing plate are hermetically connected with the front through hole and the rear through hole of the transformer inner shell, and sealing rings connected to the edges of the front sealing plate and the rear sealing plate are embedded into the ring grooves;

the two ends of the radiating pipe are respectively connected with the front sealing plate and the rear sealing plate and communicated with the heat exchange channel, and the spoiler is fixed on the outer walls of the front sealing plate and the rear sealing plate.

Furthermore, the transmission assembly comprises a sleeve, an upper rotating shaft, sealing blades and a lower rotating shaft, the sleeve is connected with the oil inlet pipe, one end of the upper rotating shaft is inserted into the sleeve, the other end of the upper rotating shaft is connected with the upper bevel gear set, the sealing blades are fixed in the radial direction of the upper rotating shaft at equal intervals, and the sealing blades are connected with the sleeve in a sealing manner;

one end of the lower rotating shaft is fixed at the circle center of the front sealing plate, the other end of the lower rotating shaft is connected with the lower bevel gear set, the lower bevel gear set is connected with the upper bevel gear set through a transmission rod, and the transmission rod penetrates through a bearing of the inner shell of the transformer and is in sealing connection.

Furthermore, two groups of heat dissipation assemblies are arranged, and the lower bevel gear sets of the two groups of heat dissipation assemblies are connected through a transmission shaft.

Furthermore, the radiating pipe penetrates through the transformer inner shell and is attached to the coil, and is used for taking away heat generated in the coil.

The invention provides another technical scheme, which comprises a using method of a power transformer used in a humid environment, and comprises the following steps:

s1: cooling oil in the oil inlet pipe flows into the sleeve, the generated pressure pushes the sealing fan blades to rotate, so that the upper rotating shaft is driven to rotate, and liquid in the sleeve is discharged into the heat exchange channel from the hole of the sleeve;

s2: the upper rotating shaft drives the two groups of radiating assemblies to rotate through the transmission rod and the transmission shaft;

s3: preceding closing plate and back closing plate are at rotatory in-process, and the coolant liquid flows in the radiator pipe, takes away the heat that produces on the coil, and the rotatory fluid mixture of accelerating of cooperation spoiler avoids local overheat to discharge from fluid exit tube.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a power transformer for a humid environment and a using method thereof.A transformer outer shell is sleeved outside an inner shell, and a heat exchange channel is formed between the transformer outer shell and the inner shell; fluid exit tube will have thermal fluid discharge, fluid advances to be connected through drive assembly between pipe and the radiator unit, fluid that fluid advances the pipe and gets into can drive sealed flabellum rotatory, sealed flabellum drives upper spinning shaft synchronous revolution in rotatory in-process, upper spinning shaft is at rotatory in-process, it is rotatory to drive lower spinning shaft, thereby let the cooling tube rotatory, the position of cooling tube and coil laminating, absorption coil's heat, the cooling tube that is located below the liquid level slowly lifts when rotatory, take away the back with the heat, continue to lift to the back beyond the liquid level, the liquid flows in the cooling tube, arrange to the fluid of heat transfer passageway with thermal fluid and mix, avoid next rotation, fluid contains higher temperature laminating coil, lead to the unable more heat of taking away, utilize the flow of liquid, avoid local overheat, lead to the efficiency of heat transfer relatively poor.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is an overall partial cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of a transformer with the inner case removed according to the present invention;

FIG. 4 is a view of the heat sink assembly of the present invention;

FIG. 5 is a perspective view of the heat sink assembly of the present invention;

fig. 6 is an enlarged view of fig. 4 at a.

In the figure: 1 transformer shell, 11 oil inlet pipes, 12 oil outlet pipes, 2 transformer inner shells, 21 through holes, 22 ring grooves, 3 iron cores, 4 coils, 41 high-voltage insulating sleeves, 42 low-voltage insulating sleeves, 5 heat dissipation assemblies, 51 front sealing plates, 52 rear sealing plates, 53 heat dissipation pipes, 54 spoilers, 6 transmission assemblies, 61 sleeves, 62 upper rotating shafts, 63 sealing fan blades, 64 lower rotating shafts, 7 upper bevel gear sets and 8 lower bevel gear sets.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a power transformer for a wet environment includes a transformer outer shell 1, a transformer inner shell 2, an iron core 3 and a coil 4, wherein the coil 4 is wound on the iron core 3, the transformer inner shell 2 is connected with a bottom plate 8 to form a sealed inner shell, the coil 4 and the iron core 3 are prevented from being affected by an external wet environment through the sealed inner shell, the coil 4 and the iron core 3 are disposed in the inner shell, the transformer outer shell 1 is sleeved outside the inner shell, and a heat exchange channel is formed between the transformer outer shell 1 and the inner shell.

The high-voltage insulating bushing 41 and the low-voltage insulating bushing 42 connected with the coil 4 extend to the outside of the transformer outer housing 1 through the transformer inner housing 2, and the high-voltage insulating bushing 41 and the low-voltage insulating bushing 42 are subjected to insulation treatment.

Aligned through holes 21 are processed at the front end and the rear end of the transformer inner shell 2, an annular groove 22 is formed in the outer wall of the transformer inner shell 2 outside the through holes 21, the depth of the annular groove 22 is half of the thickness of the transformer inner shell 2, and a heat dissipation assembly 5 for sealing the through holes 21 is embedded in the annular groove 22.

The transformer shell 1 is connected with an oil inlet pipe 11 and an oil outlet pipe 12 which are inserted into a heat exchange channel, cooled oil flows into the oil inlet pipe 11, the oil outlet pipe 12 discharges the oil with heat, and the oil inlet pipe 11 is connected with the heat dissipation assembly 5 through a transmission assembly 6.

Referring to fig. 4-6, two sets of heat dissipating assemblies 5 are provided, and the lower bevel gear sets 8 of the two sets of heat dissipating assemblies 5 are connected by a transmission shaft, and the two sets of heat dissipating assemblies 5 are synchronously rotated by the transmission shaft, each heat dissipating assembly 5 includes a front sealing plate 51, a rear sealing plate 52, a heat dissipating pipe 53 and a spoiler 54, the front sealing plate 51 and the rear sealing plate 52 are hermetically connected with the front and rear through holes 21 of the transformer inner casing 2, the sealing rings connected to the edges of the front sealing plate 51 and the rear sealing plate 52 are embedded into the annular grooves 22, the front sealing plate 51 and the rear sealing plate 52 cover the front and rear through holes 21, and the sealing rings are embedded into the annular grooves 22 to perform a reinforced sealing process, and the heat dissipating assemblies can rotate on the through holes 21 through the front sealing plate 51 and the rear sealing plate 52.

The both ends of cooling tube 53 are connected with preceding closing plate 51 and back closing plate 52 respectively, a plurality of cooling tubes 53 are connected with preceding closing plate 51 and back closing plate 52, and communicate with heat transfer channel, cooling tube 53 runs through transformer inner shell 2 and the laminating of coil 4, the cooling fluid that flows in cooling tube 53, be used for taking away the heat that produces in the coil 4, spoiler 54 is fixed on the outer wall of preceding closing plate 51 and back closing plate 52, spoiler 54 is at rotatory in-process, stir the fluid in the heat transfer channel, the mixture of acceleration fluid, the fluid that will take away heat and the fluid in the heat transfer channel mix together fast, avoid local mixing too high or low excessively.

The transmission assembly 6 comprises a sleeve 61, an upper rotating shaft 62, sealing blades 63 and a lower rotating shaft 64, the sleeve 61 is connected with an oil inlet pipe 11, one end of the upper rotating shaft 62 is inserted into the sleeve 61, the other end of the upper rotating shaft 62 is connected with an upper bevel gear set 7, the sealing blades 63 are fixed in the radial direction of the upper rotating shaft 62 at equal intervals, the sealing blades 63 are connected with the sleeve 61 in a sealing manner, oil entering the oil inlet pipe 11 can drive the sealing blades 63 to rotate, the sealing blades 63 drive the upper rotating shaft 62 to rotate synchronously in the rotating process, the upper rotating shaft 62 rotates through the upper bevel gear set 7, holes communicated with a heat exchange channel are further processed in the sleeve 61, the oil flows into the heat exchange channel through the holes, the liquid level of the oil in the heat exchange channel is slowly lifted until a large half of the front sealing plate 51 and the rear sealing plate 52 is submerged.

One end of the lower rotating shaft 64 is fixed at the center of the front sealing plate 51, the other end of the lower rotating shaft 64 is connected with the lower bevel gear set 8, the lower bevel gear set 8 is connected with the upper bevel gear set 7 through the transmission rod 65, the transmission rod 65 passes through the bearing of the transformer inner shell 2 and is connected in a sealing manner, the upper rotating shaft 62 drives the lower rotating shaft 64 to rotate in the rotating process, so that the radiating pipe 53 rotates, the position of the radiating pipe 53 attached to the coil 4 absorbs the heat of the coil 4, the radiating pipe 53 below the liquid level is slowly lifted in the rotating process, after the heat is taken away, the liquid in the radiating pipe 53 flows out after the radiating pipe is continuously lifted to the outside of the liquid level, the oil containing the heat is discharged into the oil of the heat exchange channel to be mixed, the next rotation is avoided, the oil contains the higher temperature attached to the coil 4, so that more heat cannot be taken away, and the local overheating is avoided by the flowing of the liquid, resulting in poor heat exchange efficiency.

Method of use of a power transformer for wet environments, comprising the steps of:

the method comprises the following steps: the cooling oil in the oil inlet pipe 11 flows into the sleeve 61, the generated pressure pushes the sealing fan 63 to rotate, so as to drive the upper rotating shaft 62 to rotate, and the liquid in the sleeve 61 is discharged into the heat exchange channel from the hole of the sleeve 61;

step two: the upper rotating shaft 62 drives the two groups of radiating assemblies 5 to rotate through the transmission rod 65 and the transmission shaft;

step three: in the rotating process of the front sealing plate 51 and the rear sealing plate 52, the cooling liquid flows in the heat dissipation pipe 53, takes away heat generated on the coil 4, and is matched with the spoiler 54 to rotate to accelerate oil mixing, so that local overheating is avoided, and the oil is discharged from the oil outlet pipe 12.

In conclusion; according to the power transformer for the humid environment, the transformer outer shell 1 is sleeved outside the inner shell, and a heat exchange channel is formed between the transformer outer shell 1 and the inner shell; the oil outlet pipe 12 discharges oil with heat, the oil inlet pipe 11 is connected with the heat dissipation assembly 5 through the transmission assembly 6, the oil entering the oil inlet pipe 11 can drive the sealing fan blades 63 to rotate, the sealing fan blades 63 drive the upper rotating shaft 62 to synchronously rotate in the rotating process, the upper rotating shaft 62 drives the lower rotating shaft 64 to rotate in the rotating process, so that the heat dissipation pipe 53 rotates, the position of the heat dissipation pipe 53 attached to the coil 4 absorbs the heat of the coil 4, the heat dissipation pipe 53 below the liquid level is slowly lifted in the rotating process, after the heat is taken away, the liquid in the heat dissipation pipe 53 flows out after being continuously lifted to the position beyond the liquid level, the oil with the heat is discharged into the oil of the heat exchange channel to be mixed, the next rotation is avoided, the oil contains the high-temperature attaching coil 4, and more heat cannot be taken away, the flowing of the liquid is utilized, and local overheating is avoided, resulting in poor heat exchange efficiency.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. A power transformer for a humid environment is characterized by comprising a transformer outer shell (1), a transformer inner shell (2), an iron core (3) and a coil (4), wherein the coil (4) is wound on the iron core (3), the transformer inner shell (2) is connected with a bottom plate (5) to form a sealed inner shell, the coil (4) and the iron core (3) are arranged in the inner shell, the transformer outer shell (1) is sleeved outside the inner shell, and a heat exchange channel is formed between the transformer outer shell (1) and the inner shell;

the high-voltage insulating sleeve (41) and the low-voltage insulating sleeve (42) connected with the coil (4) penetrate through the transformer inner shell (2) and extend to the outside of the transformer outer shell (1).

2. A power transformer for use in a humid environment according to claim 1, characterized in that the transformer inner casing (2) is formed with aligned through holes (21) at both front and rear ends thereof, the transformer inner casing (2) is provided with a ring groove (22) on the outer wall thereof outside the through holes (21), and the ring groove (22) is embedded with the heat dissipating member (5) for sealing the through holes (21).

3. A power transformer for wet environments according to claim 2, characterized in that the transformer housing (1) is connected with an oil inlet pipe (11) and an oil outlet pipe (12) inserted into the heat exchange channel, and the oil inlet pipe (11) and the heat sink assembly (5) are connected by the transmission assembly (6).

4. A power transformer for use in a humid environment according to claim 3, wherein the heat dissipating module (5) comprises a front sealing plate (51), a rear sealing plate (52), a heat dissipating pipe (53) and a spoiler (54), the front sealing plate (51) and the rear sealing plate (52) are hermetically connected to the front and rear through holes (21) of the inner case (2) of the transformer, and the sealing rings connected to the edges of the front sealing plate (51) and the rear sealing plate (52) are inserted into the ring grooves (22);

two ends of the radiating pipe (53) are respectively connected with the front sealing plate (51) and the rear sealing plate (52) and communicated with the heat exchange channel, and the spoiler (54) is fixed on the outer walls of the front sealing plate (51) and the rear sealing plate (52).

5. The power transformer for the humid environment according to claim 4, wherein the transmission assembly (6) comprises a sleeve (61), an upper rotating shaft (62), sealing blades (63) and a lower rotating shaft (64), the sleeve (61) is connected with the oil inlet pipe (11), one end of the upper rotating shaft (62) is inserted into the sleeve (61), the other end of the upper rotating shaft (62) is connected with the upper bevel gear set (7), the sealing blades (63) are fixed in the radial direction of the upper rotating shaft (62) at equal intervals, and the sealing blades (63) are connected with the sleeve (61) in a sealing manner;

one end of the lower rotating shaft (64) is fixed at the circle center of the front sealing plate (51), the other end of the lower rotating shaft (64) is connected with the lower bevel gear set (8), the lower bevel gear set (8) is connected with the upper bevel gear set (7) through a transmission rod (65), and the transmission rod (65) penetrates through a bearing of the transformer inner shell (2) and is in sealing connection.

6. A power transformer for wet environments, according to claim 5, characterized in that the heat dissipating modules (5) are provided in two sets, and the lower bevel gear sets (8) of the two sets of heat dissipating modules (5) are connected by a transmission shaft.

7. A power transformer for humid environments, according to claim 6, characterized by heat pipes (53) extending through the transformer inner casing (2) and attached to the coil (4) for carrying away heat generated in the coil (4).

8. Use of a power transformer for wet environments according to claim 7, characterised by the following steps:

s1: cooling oil in the oil inlet pipe (11) flows into the sleeve (61), the generated pressure pushes the sealing fan blades (63) to rotate, so that the upper rotating shaft (62) is driven to rotate, and liquid in the sleeve (61) is discharged into the heat exchange channel from the hole of the sleeve;

s2: the upper rotating shaft (62) drives the two groups of radiating assemblies (5) to rotate through the transmission rod (65) and the transmission shaft;

s3: in the rotating process of the front sealing plate (51) and the rear sealing plate (52), cooling liquid flows in the radiating pipe (53), heat generated on the coil (4) is taken away, the spoiler (54) is matched to rotate to accelerate oil liquid mixing, local overheating is avoided, and the cooling liquid is discharged from the oil liquid outlet pipe (12).