CN217134156U

CN217134156U - Cooling device for transformer

Info

Publication number: CN217134156U
Application number: CN202220778159.6U
Authority: CN
Inventors: 王炳光; 安振; 高辉; 冯弼乾; 冯春玲; 郭勤标
Original assignee: Wujiang Transformer Co Ltd
Current assignee: Wujiang Transformer Co Ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-08-05
Anticipated expiration: 2032-04-06

Abstract

The utility model belongs to transformer heat dissipation field specifically discloses a cooling device for transformer, wherein, include: the heat dissipation assembly comprises an upper oil guide pipe, a heat dissipation assembly and a lower oil guide pipe; the insulating oil in the oil tank flows through the upper oil guide pipe, the heat dissipation assembly and the lower oil guide pipe in sequence and then is gathered into the oil tank; the lower oil guide pipe comprises a flow dividing pipe, two oil guide branches connected in parallel and a collecting pipe, the flow dividing pipe is communicated with the cooling channel, the collecting pipe is communicated with the oil tank, one end of the oil guide branch is communicated with the flow dividing pipe, and the other end of the oil guide branch is communicated with the collecting pipe; lead oily branch road and include oil pipe to and on oil pipe from the reposition of redundant personnel end to converging first butterfly valve, axial flow oil pump, oil flow relay and the second butterfly valve that the end set gradually that converges. The utility model discloses set up first butterfly valve and second butterfly valve in order to be used for the monitoring flow rate on leading oil branch road, when showing the velocity of flow and surpassing the predetermined velocity of flow, the staff can in time feed back. Avoid because the velocity of flow leads to the component on the branch road to be damaged too fast, or because the velocity of flow leads to the branch road vibrations to drop because too fast.

Description

Cooling device for transformer

Technical Field

The utility model belongs to the technical field of the transformer heat dissipation, concretely relates to a cooling device for transformer.

Background

The oil tank in the oil-immersed transformer is filled with insulating oil, and the coil and other electrified components can generate temperature rise in the working process, so that the insulating oil is required to insulate the inside of the oil tank integrally, and meanwhile, the insulating oil is required to be used for heat dissipation. Therefore, in order to prevent the insulating oil from absorbing heat generated after the excessive energizing components operate for a long time and increasing the temperature, thereby affecting the insulating effect and the heat dissipation effect, the insulating oil needs to be cooled when the transformer operates. An oil tank in the prior art is connected with two oil guide pipes, a heat dissipation assembly is arranged between the two oil guide pipes, hot oil in the oil tank flows out through the upper oil guide pipe and flows through the heat dissipation assembly to be cooled, and cooled insulating oil flows into the oil tank again to participate in insulation and heat dissipation work in the oil tank.

In actual operation, various control valves, oil pumps and other elements of the transformer are very easy to break down after working for a long time, and the transformer needs to be stopped to operate for maintenance after the break down occurs, so that the production efficiency is reduced, the time is consumed, and the transformer is easy to break down when multiple faults are frequently started and stopped. In order to solve the above problems, chinese patent CN207116177U discloses a heat dissipation oil conduit structure of a power transformer. In the scheme, the forced oil circulation air-cooled transformer is arranged in a structure of the forced oil circulation air-cooled transformer, an oil guide pipeline of each group of radiators of the transformer is divided into two parallel pipelines, an oil pump is arranged on the oil guide pipeline of each pipeline, the two parallel oil guide pipelines are respectively communicated with an oil guide box, and are converged into one pipeline through the oil guide box and then communicated with an oil guide pipe of a transformer body. The oil inlet of each group of radiators is divided into two paths, each path is provided with an oil pump, and when one oil pump runs, the other oil pump is standby. Therefore, when one of the transformers has a fault, the fault position can be maintained on the basis of keeping the normal operation of the transformer.

However, the pipeline structure is relatively complex, elements on the branch are easily damaged when the flow speed in the pipeline is too high, the pipeline can be vibrated due to the too high flow speed, and the stability of the device is not strong; the device still has a safety hazard because the flow rate in the branch is not known.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cooling device for transformer for there is the problem of potential safety hazard in solving present cooling device.

In order to solve the technical problem, the technical scheme of the utility model is that: a cooling apparatus for a transformer, comprising: the heat dissipation assembly comprises an upper oil guide pipe, a heat dissipation assembly and a lower oil guide pipe; insulating oil in the oil tank flows through the upper oil guide pipe, the heat dissipation assembly and the lower oil guide pipe in sequence and then is gathered into the oil tank;

the lower oil guide pipe comprises a flow dividing pipe, two oil guide branches connected in parallel and a collecting pipe, the flow dividing pipe is communicated with the cooling channel, the collecting pipe is communicated with an oil tank, one end of the oil guide branch is communicated with the flow dividing pipe, and the other end of the oil guide branch is communicated with the collecting pipe; lead oily branch road and include oil pipe and from the reposition of redundant personnel end to converging first butterfly valve, axial flow oil pump, oil flow relay and the second butterfly valve that the end set gradually that converges on the oil pipe.

In a preferred embodiment of the present invention, the oil guiding branch further includes a cut-off valve disposed between the second butterfly valve and the oil flow relay.

The utility model discloses a preferred embodiment, the radiator unit includes a plurality of radiators and cold oil pipe, set up the heat dissipation chamber in the radiator, insulating oil from after the upper oil pipe flows out, flow through in proper order the heat dissipation chamber with cold oil pipe.

In a preferred embodiment of the present invention, the heat dissipation chamber is communicated with the cold oil pipe through a third butterfly valve.

In a preferred embodiment of the present invention, the heat dissipation assembly further comprises at least two fans, the fans are disposed at the bottom of the heat sink, and the heat sink is located at the air outlet side of the fans.

The utility model discloses a preferred embodiment, lead oil pipe on including first and second, lead oil pipe on the first and lead oil pipe and oil tank intercommunication, on the second lead oil pipe with radiator unit intercommunication, on the first lead oil pipe with lead through the corrugated metal pipe connection on the second between the oil pipe.

In a preferred embodiment of the present invention, the first upper oil guiding pipe is communicated with the oil tank through a fourth butterfly valve, and the lower oil guiding pipe is communicated with the oil tank through a fifth butterfly valve.

In a preferred embodiment of the present invention, a fixing frame is disposed between the upper oil guiding pipe and the cold oil pipe, the fixing frame is of a trapezoidal structure, the fixing frame includes a long bottom edge, a short bottom edge, a straight waist edge and an inclined waist edge, the short bottom edge is fixed to one end of the cold oil pipe close to the oil tank, and the long bottom edge is fixed to the upper oil guiding pipe;

straight waist pass through the mounting with oil tank fixed connection, the oil tank is close to one side of radiator unit sets up the flange, the one end of mounting weld in the flange, the other end is fixed in straight waist.

The utility model discloses a preferred embodiment still includes the regulation support that supports down lead oil pipe, adjust the support and include base and adjusting screw, adjusting screw's one end is passed the screw hole and is located in the base, the other end supports lead oil pipe's bottom down.

The technical scheme provided by the utility model compare with prior art and have following advantage: the utility model discloses set up first butterfly valve and second butterfly valve in order to be used for the monitoring flow rate on leading oil branch road, when showing the velocity of flow and surpassing the predetermined velocity of flow, the staff can in time feed back. The damage of elements on the branch circuit caused by the over-high flow speed is avoided, or the branch circuit is vibrated to fall off or even fall off due to the over-high flow speed, and when the branch circuit breaks down, butterfly valves at two ends of the branch circuit can be closed simultaneously to maintain or replace the broken components.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, drawings of other embodiments can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a cooling apparatus for a transformer according to an embodiment of the present invention;

fig. 2 is a bottom view of a cooling device for a transformer according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a heat dissipation assembly of a cooling apparatus for a transformer according to an embodiment of the present invention;

fig. 4 is a schematic view of a fixing assembly of a cooling device for a transformer according to an embodiment of the present invention.

Shown in the figure: 10-a fuel tank; 201-a first upper oil conduit; 202-a second upper oil conduit; 203-metal bellows; 204-a fourth butterfly valve; 301-a heat sink; 3011-a heat dissipation chamber; 302-cold oil pipe; 303-a fan; 304-a third butterfly valve; 401-a first butterfly valve; 402-an axial flow oil pump; 403-a relay; 404-a shut-off valve; 405-a second butterfly valve; 406-a fifth butterfly valve; 407-shunt tube; 408-a collecting pipe; 501-long bottom edge; 502-short bottom edge; 503-straight waist edge; 504-oblique waist edge; 505-a fixture; 506-a support bar; 507-adjusting the stent; 508-adjusting screw.

Detailed Description

For ease of understanding, the cooling device for a transformer is described below with reference to examples, which are to be understood as merely illustrative and not limiting the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations and positional relationships based on the orientation and positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

A cooling apparatus for a transformer, comprising: the heat dissipation assembly comprises an upper oil guide pipe, a heat dissipation assembly and a lower oil guide pipe; insulating oil in the oil tank flows through the upper oil guide pipe, the radiating assembly and the lower oil guide pipe in sequence and then flows into the oil tank.

The utility model discloses an in the embodiment, it all has two with radiator unit to go up oil pipe, and carries out work simultaneously.

Referring to fig. 1, the upper oil guide pipe includes a first upper oil guide pipe 201 and a second upper oil guide pipe 202, the first upper oil guide pipe 201 is communicated with the oil tank 10 through a fourth butterfly valve 204, the second upper oil guide pipe 202 is communicated with the first upper oil guide pipe 201 through a metal bellows 203, and a plurality of first through holes are formed in the bottom of the second upper oil guide pipe 202.

Because production errors inevitably exist in the production and manufacturing process of the cooling device, the metal corrugated pipe 203 is connected to overcome the production errors of the device, and the device is simple to install and is not easy to leak oil.

Referring to fig. 1-2, the heat dissipation assembly includes a plurality of heat sinks 301, a cold oil pipe 302 and a fan 303, the plurality of heat sinks 301 are symmetrically arranged along the cold oil pipe 302, a heat dissipation cavity 3011 is formed in each heat sink 301, the heat dissipation cavity 3011 corresponds to a first through hole one by one, insulating oil flows into the heat dissipation cavity 3011 from the second upper oil guide pipe 202 through the first through hole for cooling, a third butterfly valve 304 is arranged between each heat sink 301 and the cold oil pipe 302, a plurality of second through holes are formed in the side wall of the cold oil pipe 302, and the insulating oil cooled in the heat dissipation cavity 3011 flows into the cold oil pipe 302 through the third butterfly valve 304. The bottom of cold oil pipe 302 is provided with fan 303, and the heat dissipation assembly further includes at least two fans 303, refer to fig. 3, and fan 303 is disposed at the bottom of heat sink 301, and heat sink 301 is disposed at the air outlet side of fan 303.

The symmetrical arrangement of the heat radiator 301 can make the oil flow more uniform and the cooling effect better. After the fifth butterfly valve 406 is closed, the whole heat dissipation device can be directly disassembled or assembled, transformer oil drainage and vacuum oil injection are not needed, and the whole operation is very convenient. In addition, the hot insulating oil enters the radiator 301 through the upper oil guide pipe, heat is released to the air in a heat radiation mode, and the oil temperature is reduced and then flows to the cold oil pipe 302 along the radiator 301 according to the heat convection principle. The bottom of the heat sink 301 is provided with a fan 303 which blows air along the gaps between the heat dissipation fins to blow away the hot air between the heat dissipation fins 301, so that the heat dissipation efficiency of the heat dissipation fins 301 is improved.

Referring to fig. 2, the lower oil guiding pipe includes a dividing pipe 407, two oil guiding branches connected in parallel, and a collecting pipe 408, and the dividing pipe 407 and the collecting pipe 408 are three-way pipes. The shunt pipe 407 is communicated with the cooling channel, and the collecting pipe 408 is communicated with the oil tank 10 through a fifth butterfly valve 406; one end of the oil guide branch is communicated with the shunt pipe 407, and the other end is communicated with the collecting pipe 408; the oil guide branch comprises a first butterfly valve 401, an axial flow oil pump 402, an oil flow relay 403, a stop valve 404 and a second butterfly valve 405 in sequence from a flow dividing end to a confluence end.

The utility model discloses set up first butterfly valve 401 and second butterfly valve 405 in order to be used for the monitoring flow rate on leading oil branch, when showing the velocity of flow and surpassing the predetermined velocity of flow, the staff can in time feed back. The branch circuit protection device has the advantages that the situation that elements on the branch circuit are damaged due to the fact that the flow speed is too fast is avoided, or the branch circuit shakes to fall off or even scatter due to the fact that the flow speed is too fast is avoided, and when the branch circuit breaks down, butterfly valves at two ends of the branch circuit can be closed simultaneously, and the broken components can be maintained or replaced.

However, when a cooling device of the transformer has a large fault, the fourth butterfly valve 204 and the fifth butterfly valve 406 can be closed at the same time to maintain the transformer, and the normal operation of the transformer in the whole process is not affected.

When the transformer works, because the internal pressure of one oil guide branch is reduced when the oil is introduced into the other oil guide branch, the pressure difference between the two oil guide branches may press the insulating oil into the oil guide branch which does not work, so that the insulating oil circulates between the two oil guide branches and does not enter the transformer oil tank 10. The cut-off valve 404 can interrupt oil flow in the idle oil guiding branch to ensure that the insulating oil is conducted in one direction in the oil guiding branch, so as to prevent oil flow circulation, promote the cooled insulating oil to enter the oil tank 10, and help the insulating oil in the whole transformer oil tank 10 to be cooled.

The utility model discloses the hot insulating oil flows through two last oil pipe to lead oil pipe on to one as an example, and hot insulating oil flows out from oil tank 10, gets into heat dissipation chamber 3011 in radiator 301 behind last oil pipe, becomes cold insulating oil after the cooling, flows into cold oil pipe 302, and the insulating oil stream in cold oil pipe 302 leads oil pipe downwards, converges transformer oil tank 10 behind the oil branch road of leading of work in leading oil pipe under.

For holistic stability of reinforcing means and rigidity intensity, produce vibrations when overcoming the transformer operation, the utility model relates to an embodiment, it is shown with reference to figure 4, the utility model discloses in still be provided with fixed subassembly, fixed subassembly includes mount and mounting. A fixing frame is arranged between the second upper oil guide pipe 202 and the cold oil pipe 302, the fixing frame is of a trapezoidal structure and comprises a long bottom edge 501, a short bottom edge 502, a straight waist edge 503 and an inclined waist edge 504, the short bottom edge 502 is fixed at one end, close to the oil tank 10, of the cold oil pipe 302, and the long bottom edge 501 is fixed at the second upper oil guide pipe 202; a fixing member 505 is arranged between the straight waist edge 503 and the oil tank 10, a flange is arranged on one side of the oil tank 10 close to the heat dissipation assembly, one end of the fixing member 505 is welded on the flange, the other end of the fixing member is fixed on the straight waist edge 503, and a support rod 506 is arranged on at least one side of the fixing member 505.

For holistic stability of reinforcing means and rigidity intensity, produce vibrations when overcoming the transformer operation, the utility model discloses in be provided with mount and mounting 505. The fixing frame is arranged to stabilize the upper oil guide pipe and the cold oil pipe 302, and the trapezoidal fixing frame is adopted to provide more supporting force for one end of the suspended cold oil pipe 302. The fixing member 505 is provided to fix the fixing bracket with the fuel tank 10, and one end of the fixing member 505 is provided with a flange, thereby avoiding mounting difficulty caused by manufacturing errors.

Continuing to refer to fig. 4, the bottom of the lower oil guiding pipe is provided with an adjusting bracket 507, the adjusting bracket 507 includes a base and an adjusting screw 508, one end of the adjusting screw 508 passes through the threaded hole and is located in the base, the other end abuts against the bottom of the lower oil guiding pipe, and the adjusting screw 508 changes the supporting height by rotating along the thread.

The utility model discloses an in the embodiment, set up in its bottom and adjust support 507, support oil pipe down, should adjust support 507 and adjust the height through adjusting screw 508, the suitability is strong, can be used to other transformers after the dismantlement.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some or all of the features thereof without departing from the scope of the present invention.

Claims

1. A cooling apparatus for a transformer, comprising: the heat dissipation assembly comprises an upper oil guide pipe, a heat dissipation assembly and a lower oil guide pipe; insulating oil in the oil tank flows through the upper oil guide pipe, the heat dissipation assembly and the lower oil guide pipe in sequence and then flows into the oil tank;

the lower oil guide pipe comprises a flow dividing pipe, two oil guide branches connected in parallel and a collecting pipe, the flow dividing pipe is communicated with the heat dissipation assembly, the collecting pipe is communicated with an oil tank, one end of the oil guide branch is communicated with the flow dividing pipe, and the other end of the oil guide branch is communicated with the collecting pipe; lead oily branch road and include oil pipe and from the reposition of redundant personnel end to converging first butterfly valve, axial flow oil pump, oil flow relay and the second butterfly valve that the end set gradually that converges on the oil pipe.

2. A cooling apparatus for a transformer according to claim 1, wherein: the oil guide branch further comprises a cut-off valve arranged between the second butterfly valve and the oil flow relay.

3. A cooling apparatus for a transformer according to claim 1, wherein: the heat dissipation assembly comprises a plurality of radiators and cold oil pipes, a heat dissipation cavity is formed in each radiator, and insulating oil flows through the heat dissipation cavity and the cold oil pipes in sequence after flowing out of the upper oil guide pipe.

4. A cooling apparatus for a transformer according to claim 3, wherein: the heat dissipation cavity is communicated with the cold oil pipe through a third butterfly valve.

5. A cooling apparatus for a transformer according to claim 3, wherein: the heat dissipation assembly further comprises at least two fans, wherein the fans are arranged at the bottom of the heat sink, and the heat sink is located on the air outlet side of the fans.

6. A cooling apparatus for a transformer according to claim 3, wherein: a fixing frame is arranged between the upper oil guide pipe and the cold oil pipe, the fixing frame is of a trapezoidal structure and comprises a long bottom edge, a short bottom edge, a straight waist edge and an inclined waist edge, the short bottom edge is fixed at one end, close to the oil tank, of the cold oil pipe, and the long bottom edge is fixed on the upper oil guide pipe;

7. A cooling apparatus for a transformer according to claim 1, wherein: the upper oil guide pipe comprises a first upper oil guide pipe and a second upper oil guide pipe, the first upper oil guide pipe is communicated with the oil tank, the second upper oil guide pipe is communicated with the heat dissipation assembly, and the first upper oil guide pipe is connected with the second upper oil guide pipe through a metal corrugated pipe.

8. A cooling apparatus for a transformer according to claim 7, wherein: the first upper oil guide pipe is communicated with the oil tank through a fourth butterfly valve, and the lower oil guide pipe is communicated with the oil tank through a fifth butterfly valve.

9. A cooling apparatus for a transformer according to claim 1, wherein: the oil pipe adjusting device is characterized by further comprising an adjusting support for supporting the lower oil guide pipe, wherein the adjusting support comprises a base and an adjusting screw rod, one end of the adjusting screw rod penetrates through a threaded hole to be located in the base, and the other end of the adjusting screw rod abuts against the bottom of the lower oil guide pipe.