CN110783069A

CN110783069A - Folder with circulating water cooling function and transformer thereof

Info

Publication number: CN110783069A
Application number: CN201910921233.8A
Authority: CN
Inventors: 张军海
Original assignee: GUANGZHOU YIBIAN POWER SOURCE EQUIPMENT Co Ltd
Current assignee: GUANGZHOU YIBIAN POWER SOURCE EQUIPMENT Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-02-11

Abstract

The invention discloses a clamp with water cooling circulation, which is used for clamping and fixing a transformer, and comprises a plurality of fixing through holes for fixing a transformer core, wherein the clamp is respectively provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with a water source, the water outlet pipe is connected with a water outlet, and cooling water enters the interior of the clamp through the water inlet pipe and then is discharged through the water outlet pipe. The invention also discloses a transformer with circulating water cooling, which comprises a transformer main body and the clamp with circulating water cooling, wherein the transformer main body comprises an iron core, a high-voltage winding and a low-voltage winding which are coaxially sleeved on the iron core, an insulating plate is arranged between the high-voltage winding and the low-voltage winding, and the clamp is fixedly connected with the iron core. According to the invention, the circulating water cooling is arranged in the clamping piece, so that the transformer can be effectively cooled.

Description

Folder with circulating water cooling function and transformer thereof

Technical Field

The invention relates to the technical field of transformers, in particular to a clamp with circulating water cooling and a transformer thereof.

Background

A transformer is an electrical device that changes an alternating voltage using the principle of electromagnetic induction. The transformer can produce more heat in the course of the work, if not get rid of in time, cause the damage of transformer internals easily, make the coil age easily simultaneously, and then influence the normal work of transformer. Meanwhile, if the heat in the transformer cannot be removed in time, the heat accumulated continuously is easy to cause fire. The need to cool and dissipate heat from the transformer becomes very important.

The transformer in the prior art mostly adopts air heat dissipation, namely natural air cooling. The heat dissipation mode can meet the heat dissipation requirement of the transformer under the general condition, but cannot play an effective role when the transformer has large power and large heat productivity and needs rapid heat dissipation; in the prior art, the transformer is generally cooled by external cooling equipment, the transformer is cooled by an air blower, a large fan or external water cooling equipment, but the air blower, the fan or the external water cooling equipment is arranged outside the transformer, so that heat in the transformer is slowly evacuated and cannot be quickly cooled. In addition, the blower or the large fan can generate extra heat after working for a long time, the heat dissipation load is increased, and the heat dissipation effect still cannot meet the requirement.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a clamp with circulating water cooling and a transformer thereof, wherein the circulating water cooling is arranged in the clamp to effectively dissipate heat of the transformer.

One of the purposes of the invention is realized by adopting the following technical scheme:

the utility model provides a folder with circulating water cooling for the fixed transformer of centre gripping, folder include a plurality of fixed through-hole that are used for fixed transformer core, the folder is equipped with inlet tube and outlet pipe respectively, advances the water piping connection water source, goes out the water piping connection outlet, and the cooling water is discharged by the outlet pipe after the inlet tube gets into the folder inside.

Furthermore, the two ends of the clamping piece are respectively provided with the water inlet pipe and the water outlet pipe.

Further, the cross section of the clamping piece is a hollow rectangle.

Further, the clamping piece comprises an upper clamping piece and a lower clamping piece, the upper clamping piece is provided with a lifting lug for fixing the transformer core, and the lower clamping piece is provided with a fan support and a base support.

Furthermore, the water inlet pipe, the water outlet pipe and the fixing through holes are all welded to the clamping piece in a seamless mode, and the outer wall of the clamping piece is coated with an insulating layer.

Furthermore, the folder still is equipped with the circulating pump, the circulating pump set up in the inlet tube outside, the inside water-cooling pipeline of folder is full of to drive cooling water.

The second purpose of the invention is realized by adopting the following technical scheme:

the utility model provides a transformer with circulating water cooling, includes transformer main part and as above arbitrary folder with circulating water cooling, transformer main part includes that iron core and coaxial cover establish high voltage winding and the low voltage winding on the iron core, be provided with the insulation board between high voltage winding and the low voltage winding, folder and iron core fixed connection.

Furthermore, the upper end and the lower end of the transformer main body are respectively provided with two clamping pieces, the clamping pieces form a rectangular central control frame, and the iron core is arranged in the rectangular hollow frame.

Further, the iron core includes stem and yoke, the stem includes a plurality of first iron core pieces that range upon range of setting, the yoke includes a plurality of second iron core pieces that range upon range of setting, second iron core piece cross-section is the echelonment, just the both ends of first iron core piece are dwindled towards the tip direction, the second iron core piece is equipped with the recess with the hookup location of first iron core piece, the recess is sunken along the direction that first iron core piece dwindles, first iron core piece with the crisscross concatenation of second iron core piece.

Furthermore, high-voltage clamping pieces are arranged at the upper end and the lower end of the high-voltage winding on the inner side of the high-voltage incoming line terminal, low-voltage clamping pieces are arranged at the upper end and the lower end of the low-voltage winding on the inner side of the low-voltage outgoing line terminal, an iron yoke is arranged between the high-voltage clamping pieces and the low-voltage clamping pieces, insulating pieces are arranged on two sides of the iron yoke, and the clamping pieces are tightly attached to; the thickness of insulating piece is less than 0.3 mm.

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

the invention provides a clamp with circulating water cooling and a transformer thereof. The clamping piece has a compact structure, can be directly applied to the traditional transformer without being greatly changed, and has a good cooling effect.

Drawings

FIG. 1 is a three-dimensional view of an upper clip according to an embodiment of the present invention;

FIG. 2 is a three-dimensional view of a lower clip according to an embodiment of the present invention;

fig. 3 is a schematic front view of a transformer according to an embodiment of the present invention;

fig. 4 is a schematic side view of a transformer according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an iron core according to an embodiment of the present invention;

FIG. 6 is a schematic view of plane A-A of FIG. 5;

in the figure: 1. a water inlet pipe; 2. a water outlet pipe; 3. lifting lugs; 4. a fixing through hole; 5. a fan bracket; 6. a base support; 7. a fan; 8. an upper clamp; 9. a lower clamp; 10. a stem; 11. an iron yoke; 12. an insulating sheet; 13. a second iron core sheet; 14. a high voltage incoming terminal; 15. and a low-voltage outlet terminal.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "" second "are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-2, the present invention provides a clamping device with circulating water cooling for clamping and fixing a transformer, the clamping device includes a plurality of fixing through holes 4 for fixing a transformer core, the clamping device is respectively provided with a water inlet pipe 1 and a water outlet pipe 2, the water inlet pipe 1 is connected with a water source, the water outlet pipe 2 is connected with a water outlet, and cooling water enters the clamping device through the water inlet pipe 1 and then is discharged through the water outlet pipe 2.

The folder that provides in this application improves through the folder to tradition, adds the inlet tube 1 of connecting the water source and the drain pipe 2 of being connected the outlet, is full of the cooling water with folder inside, drives the cooling water and in folder inside continuous circulation flow, in time discharges away the produced heat in the air of transformer, the effectual temperature that reduces the transformer. The structure of the clamping piece is the same as the external structure of the clamping piece in the traditional transformer, the clamping piece in the traditional transformer can be directly replaced, the interior of the transformer is not required to be changed, and convenience is brought to a user to directly replace the clamping piece.

Specifically, as shown in fig. 1 and 2, the present invention provides a clip with three views. The clamping piece is a rectangular steel pipe and is provided with a plurality of fixing through holes 4 for fixing the transformer iron core. The clamping pieces are respectively provided with a water inlet pipe 1 and a water outlet pipe 2, and the positions of the water inlet pipe and the water outlet pipe can be set according to specific conditions. In a possible embodiment, the water inlet pipe 1 is arranged on the bottom surface of the clamp and the water outlet pipe 2 is arranged on the top surface of the clamp. Inside the inside folder of cooling water entering by inlet tube 1, the folder is inside to be full of cooling water, is discharged by outlet pipe 2 again, guarantees that the cooling water can be full of the folder constantly inside, in time discharges away the produced heat of transformer. The arrangement mode needs larger power of the water pump to ensure that the cooling water is discharged from the water outlet pipe 2, and the water inlet pipe 1 is easily subjected to larger pressure and is easily damaged. In this embodiment, the water inlet pipe 1 and the water outlet pipe 2 are respectively disposed at two ends of the clamping member. The water inlet pipe 1 is connected with a water source, and the water outlet pipe 2 is connected with a water outlet. Because the traditional clamping pieces are all horizontally arranged, cooling water is difficult to fill the whole clamping pieces. Therefore, a circulating pump is further arranged, the circulating pump is arranged outside the water inlet pipe 1, and the interior of the clamping piece is filled with driving cooling water.

The clamping pieces are all welded with the water inlet pipe 1, the water outlet pipe 2 and the fixing through hole 4 in a seamless mode, and the surfaces of the welding positions are flat and smooth. The inner part of the clamping piece is ensured to form a closed space, cooling water is filled in the closed space, and the cooling water cannot leak out of the clamping piece. If the cooling water leaks, the insulation aging of the transformer is caused if the cooling water leaks, the insulation level is reduced, and short circuit is caused if the cooling water leaks, so that electric sparks are generated, and the normal work of the transformer is influenced, even the transformer catches fire and explodes. Therefore, the water inlet pipe 1, the water outlet pipe 2, the fixing through hole 4 and the clamping piece are tightly welded, and the cooling water is prevented from leaking. The outer surface of the clamping piece is coated with the anti-rust primer firstly and then is coated with the insulating paint, so that the service life and the insulation of the clamping piece are ensured. In the embodiment, the cooling water is tap water, so that the cost is low, the source is wide, the environment is protected, the energy is saved, and the pollution is avoided. The user can select different cooling water according to actual conditions, and can adopt liquid with larger specific heat capacity.

The clamping piece comprises an upper clamping piece 8 and a lower clamping piece 9, the iron core is clamped between the upper clamping piece 8 and the lower clamping piece 9 from top to bottom, and the sections of the upper clamping piece 8 and the lower clamping piece 9 are both hollow rectangles, so that the mechanical strength of the clamping piece is better. When the iron core is clamped by the fixing through hole 4 of the clamping piece, the clamping effect of the iron core is better, and the noise generated by the vibration of the iron core is reduced. The upper clamp 8 is provided with a lifting lug 3 for fixing the transformer core, and the lower clamp 9 is provided with a fan 7 bracket 5 and a base bracket 6. The fan 7 bracket 5 is used for installing a heat radiation fan 7. The heat dissipation fans 7 are arranged at two ends of the lower clamping piece 9, the wind direction is blown to the inside of the transformer by the fans 7, heat generated in the inside of the transformer is blown to the upper side of the transformer, and the heat in the inside is timely discharged.

Based on the same invention idea, the application also provides a transformer with circulating water cooling, which comprises a transformer main body and any one of the clamping pieces with circulating water cooling, wherein the transformer main body comprises an iron core, a high-voltage winding and a low-voltage winding which are coaxially sleeved on the iron core, an insulating plate is arranged between the high-voltage winding and the low-voltage winding, and the clamping pieces are fixedly connected with the iron core.

The transformer with circulating water cooling provided by the invention uses the clamping pieces in the embodiment, and cooling water is filled in the clamping pieces and continuously and circularly flows in the clamping pieces. The cooling water with large specific heat capacity is selected and continuously flows in the working process of the transformer, so that the heat generated by the transformer in the air can be effectively absorbed, the temperature of the transformer is effectively reduced in a short time, and the problem of slow heat dissipation of the traditional transformer is solved.

Specifically, as shown in fig. 3 and 4, the front and side structural diagrams of the transformer provided by the present invention are shown. The upper end and the lower end of the transformer main body are respectively provided with two clamping pieces, the clamping pieces form a rectangular central control frame, and the iron core is arranged in the rectangular hollow frame. The upper clamping piece 8 is arranged at the top end of the transformer main body, and the lower clamping piece 9 is arranged at the bottom of the transformer main body. The iron core is fixed on the upper clamp 8 and the lower clamp 9 through the fixing through hole 4. And the upper clamping piece 8 is provided with a lifting lug 3 for reinforcing and fixing the iron core.

When the transformer has overvoltage and frequency conversion operation or the harmonic wave in the iron core is serious, the heat productivity of the iron core can be greatly increased, the temperature is greatly increased, the surface insulating layer of the iron core is accelerated to age, and the service life of the iron core is shortened. The thickness of the insulating layer between the clip and the yoke 11 is less than 0.3mm, and the heat conduction efficiency is accelerated as the thickness of the insulating layer is reduced. In this embodiment, the thickness of the clamping piece is 0.25mm, so that the iron core can transfer heat to the clamping piece, the heat dissipation efficiency is improved, and the effect of rapid heat dissipation is achieved.

In addition, the fans 7 are respectively arranged in front of and behind the lower clamping piece 9 of the transformer, wind blows to the coil from the fans 7, hot air in the transformer is driven to diffuse towards the upper clamping piece, and heat is better dissipated, the lower clamping piece 9 and the bottom of the iron core are fixedly provided with the base support 6 through the grounding bolt, the base support 6 is a hollow strip with the cross section being in the shape of П, the base support 6 is horizontally vertical to the lower clamping piece 9, the transformer is convenient to mount, and the transformer is grounded.

Each transformer comprises an iron core and a coil, and the coil comprises a high-voltage winding and a low-voltage winding. The iron core comprises a core column 10 and an iron yoke 11, and the coil is wound outside the core column 10. The stem 10 includes the first iron core piece of a plurality of range upon range of settings, the iron yoke 11 includes the second iron core piece 13 of a plurality of range upon range of settings, just the both ends that first iron core piece and second pasted the chip all reduce towards the tip direction, second iron core piece 13 is equipped with the recess with the hookup location of first iron core piece, the recess is sunken along the direction that first iron core piece reduced, first iron core piece with the crisscross splice of second iron core piece 13, the seam is the echelonment to form the magnetic flux return circuit. The step-shaped seam effectively reduces the no-load iron core loss of the transformer. Under the condition of a step-shaped seam, magnetic lines of force can vertically enter the adjacent iron core pieces, no-load current is reduced, electromagnetic force acting on the iron core pieces is reduced, the iron core pieces are pressed tightly, and noise of the transformer is obviously reduced. And the step-shaped seam can effectively reduce the no-load iron core loss of the transformer, and reduce the weight and the manufacturing consumable materials of the iron core.

The first iron core pieces are sequentially connected end to form a whole, so that the generation of eddy current effect on the iron core is further reduced, and the strength of the transformer iron core is increased. And the cross-section of yoke iron 11 is rectangle or "D" shape, when guaranteeing stem 10 and yoke iron 11 splice effect, reduces the weight and the preparation consumptive material of iron core and noise reduction by a wide margin, still further reduces noise and no-load loss when practicing thrift manufacturing cost. The seam forms certain clearance space, is filled with the epoxy layer in this clearance space, and after the heat curing for the iron core piece forms a whole, improves transformer insulation system's dielectric strength and insulation resistance, with the improvement electric insulation performance, effectively reduces the turbine effect on first iron core piece and the second iron core piece 13, has further reduced the iron core loss.

Further, the oblique angle of the joint is 45 degrees, and the joint is provided with at least 5 grades. The structure of oblique seam can effectively improve the magnetic field distribution of iron core seam department in this embodiment for the magnetic leakage of iron core is lower, improves the efficiency of transformer by a wide margin. And the number of the joints is more than 5 grade, which can increase the mechanical connection strength after the core column 10 and the iron yoke 11 are spliced.

The upper end and the lower end of the high-voltage winding are provided with high-voltage clamping pieces on the inner sides of high-voltage wire inlet terminals 14, and the upper end and the lower end of the low-voltage winding are provided with low-voltage clamping pieces on the inner sides of low-voltage wire outlet terminals 15. Specifically, as shown in fig. 4, a high-voltage clamp is disposed on the right side of the yoke 11, and a low-voltage clamp is disposed on the left side of the yoke 11. Insulating sheets 12 are arranged on two sides of an iron yoke 11 arranged between the high-voltage clamping piece and the low-voltage clamping piece, and the high-voltage clamping piece and the low-voltage clamping piece are tightly attached to the iron yoke 11 through the insulating sheets 12. The yoke 11 is composed of a plurality of second core segments 13 stacked one on another, and heat is transferred to the clip by heat conduction to dissipate heat, and the sectional areas of the plurality of core segments are all reduced toward the end portions, so that the surface area in contact with the air is increased, and the temperature of the core can be rapidly reduced.

During the operation of the transformer, certain noise is generated mainly due to the vibration of the iron core, and the iron yoke 11 is mostly exposed in the air, which causes great noise. The first iron core piece both ends of stem 10 dwindle towards the tip direction, and is less than the stem 10 diameter of traditional transformer, reduces the sectional area of stem 10 promptly, increases the magnetic flux density of stem 10, and the increase of magnetic flux density can lead to the noise increase, but stem 10 because the coil has the shielding effect, and the noise has certain decay, and the overall influence is little. As shown in fig. 5 and 6, in the structural schematic diagram of the iron core provided by the present invention, the sectional area of the second core piece 13 of the iron yoke 11 is reduced towards the end portion, and is stepped, so that the sectional area of the second core piece 13 is increased, the magnetic flux density of the iron yoke 11 is reduced, the noise generated by the iron yoke 11 is reduced, and the total noise generated by the iron core is effectively reduced. In addition, the contact area between the iron yoke 11 and the clamping piece is increased, so that the heat transfer from the iron core to the clamping piece is facilitated, and the heat dissipation is accelerated. As the diameter of the core 10 is reduced, the diameter of the coil wound around the core 10 is reduced. The weight, the length and the resistance of the material used by the coil are reduced, so that the material consumption can be effectively saved, the cost is reduced, and the effects of energy conservation and environmental protection are achieved.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a folder with circulating water cooling for the fixed transformer of centre gripping, its characterized in that, folder include a plurality of fixed through-hole that are used for fixed transformer core, the folder is equipped with inlet tube and outlet pipe respectively, advances the water piping connection water source, goes out the water piping connection outlet, and the cooling water is discharged by the outlet pipe after the inlet tube gets into the folder inside.

2. A clamping member with circulating water cooling as claimed in claim 1, wherein said clamping member is provided with one said water inlet pipe and one said water outlet pipe at both ends thereof, respectively.

3. A clip as set forth in claim 2, wherein said clip has a hollow rectangular cross-section.

4. A clip with circulating water cooling as claimed in claim 1, wherein the clip comprises an upper clip and a lower clip, the upper clip is provided with a lifting lug for fixing a transformer core, and the lower clip is provided with a fan bracket and a base bracket.

5. A clip as set forth in claim 2, wherein the inlet pipe, the outlet pipe and the fixing through hole are welded to the clip seamlessly, and the outer wall of the clip is coated with an insulating layer.

6. A clamp with circulating water cooling as claimed in claim 1, wherein the clamp is further provided with a circulating pump, the circulating pump is arranged outside the water inlet pipe, and the circulating pump drives cooling water to fill the water cooling pipe inside the clamp.

7. A transformer with circulating water cooling is characterized by comprising a transformer main body and the clamp with circulating water cooling as claimed in any one of claims 1 to 6, wherein the transformer main body comprises an iron core, a high-voltage winding and a low-voltage winding which are coaxially sleeved on the iron core, an insulating plate is arranged between the high-voltage winding and the low-voltage winding, and the clamp is fixedly connected with the iron core.

8. The transformer with circulating water cooling function as claimed in claim 7, wherein two said clamping pieces are respectively disposed at the upper and lower ends of the transformer main body, said clamping pieces form a rectangular central control frame, and said iron core is disposed in said rectangular hollow frame.

9. The transformer with circulating water cooling of claim 7, wherein the iron core comprises a core column and an iron yoke, the core column comprises a plurality of first iron core pieces arranged in a stacked manner, the iron yoke comprises a plurality of second iron core pieces arranged in a stacked manner, the cross sections of the second iron core pieces are in a step shape, two ends of each first iron core piece are reduced towards the end portion direction, a groove is formed in the connecting position of each second iron core piece and the corresponding first iron core piece, the groove is sunken along the reducing direction of the corresponding first iron core piece, and the first iron core pieces and the second iron core pieces are in staggered overlapping connection.

10. The transformer with circulating water cooling of claim 8, wherein the upper and lower ends of the high voltage winding are provided with high voltage clamps at the inner sides of the high voltage incoming line terminals, the upper and lower ends of the low voltage winding are provided with low voltage clamps at the inner sides of the low voltage outgoing line terminals, an iron yoke is arranged between the high voltage clamps and the low voltage clamps, two sides of the iron yoke are provided with insulating sheets, and the clamps are tightly attached to the iron yoke through the insulating sheets; the thickness of insulating piece is less than 0.3 mm.