CN218730250U - Forced oil circulation evaporative cooling transformer system with ventilation structure - Google Patents

Abstract

The utility model discloses a forced oil circulation evaporative cooling transformer system with a ventilation structure, which comprises a transformer body; an oil inlet pipe and an oil outlet pipe; the oil-submerged pump is arranged on the oil inlet pipe; the cooling device is connected with the transformer body through the oil inlet pipe and the oil outlet pipe; the cooling device comprises a box body, and a ventilation structure capable of being opened and closed is arranged on the side wall of the box body. The utility model discloses a set up the ventilation structure, make the transformer oil in heat exchange assemblies and the precooling module obtain abundant ventilation, realized the dry-type operation of system, practice thrift the working costs, energy saving consumes.

Description

Forced oil circulation evaporative cooling transformer system with ventilation structure

Technical Field

The utility model belongs to the electric power field, specifically speaking relates to a forced oil circulation evaporative cooling transformer system with ventilation structure.

Background

When the transformer operates, energy is lost in the iron core, the coil and the metal structural part, and the loss is converted into heat to be transmitted outwards, so that the temperature of the transformer body is increased. The temperature rise limit of the transformer is based on the service life of the transformer. The oil-immersed power transformer generally adopts A-grade insulating materials, the allowable temperature of the A-grade insulating materials is 105 ℃, and the temperature is generally considered to be 98 ℃ for the service life of the hottest point of the oil-immersed power transformer at present. For insulating materials, the aging life of the insulation is reduced by half for every 6K rise in temperature. Therefore, the transformer oil plays an important role in generating sets and power transmission and distribution processes as an important cooling medium for cooling transformer windings. At present, the temperature of the transformer oil is generally controlled by oil immersion self-cooling, oil immersion air cooling, forced oil circulation water cooling and other modes. With the continuous development of electric power and the improvement of design and manufacturing technology, the high-capacity and high-voltage transformer gradually adopts oil immersion air cooling and forced oil circulation cooling modes.

Patent with application number CN202189648U proposes the utility model relates to a transformer forced oil circulation cooler, include: the top of the water collecting tank is provided with two fans, the side wall of the water collecting tank is provided with an automatic water inlet valve of the water collecting tank, a water blocking device, a spraying pipeline, a heat dissipation body and an air inlet grille are sequentially arranged between the automatic water inlet valve of the water collecting tank and the top of the water collecting tank from top to bottom, a spraying water pump is arranged beside the water collecting tank, the inlet of the spraying water pump is connected with the water collecting tank through a butterfly valve, the outlet of the spraying water pump is connected with the spraying pipeline, the side wall of the water collecting tank is provided with an oil flow relay communicated with the heat dissipation body, the oil flow relay is connected to one side of an oil-resistant valve of a transformer through a pipeline, and the oil-resistant valve of the transformer is arranged at the outlet of the oil-resistant valve of the transformer disc pump. This application transformer forced oil circulative cooling ware, reduced the wasting of resources, practiced thrift the manufacturing cost and the running cost of cooler, avoid hidden danger such as profit series flow, make forced oil circulative cooling ware more environmental protection, energy saving and consumption reduction performance obtains improving. Because the temperature of the transformer oil generally fluctuates greatly along with the changes of the load of the group and the environmental temperature, particularly in winter, a spray water system of the transformer strong oil circulation cooler can stop running within a period of time, the dry running of the cooler can meet the heat dissipation requirement, and the ventilation structure setting needs to be considered and increased in order to ensure the ventilation quantity in the dry running.

In view of this, the present invention is provided.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides a forced oil circulation evaporative cooling transformer system with ventilation structure.

In order to solve the technical problem, the utility model adopts the following basic concept:

a forced oil circulation evaporative cooling transformer system with a ventilation structure comprises a transformer body; an oil inlet pipe and an oil outlet pipe; the oil-submerged pump is arranged on the oil inlet pipe; the cooling device is connected with the transformer body through the oil inlet pipe and the oil outlet pipe;

the cooling device comprises a box body, and a ventilation structure capable of being opened and closed is arranged on the side wall of the box body.

Furthermore, the ventilation structure include vent, ventilating board, the vent set up on the wall of box, ventilating board be connected with the box through the pivot, and what can open and close cover the vent on.

Furthermore, a supporting structure is arranged on the inner wall surface of the ventilation plate, and a support structure is arranged at the lower edge of the ventilation opening; the supporting structure is connected with the support structure in a clamping mode.

Furthermore, a clamping groove is also arranged on the inner wall surface of the ventilation plate;

one end of the supporting structure is hinged to the ventilation plate, the other end of the supporting structure is fixed to the clamping groove when the ventilation plate is in a closed state, and the other end of the supporting structure is fixed to the support structure when the ventilation plate is in an open state.

Furthermore, the supporting structure is a telescopic supporting rod.

Further, the support structure comprises a fixed plate and a limiting plate, wherein the fixed plate is a straight plate and is fixedly connected with the inner wall surface of the box body at the lower edge of the ventilation opening;

the limiting plates are arranged on two sides of the fixing plate and are a pair of side plates formed by bending and extending the two side edges of the fixing plate towards the inside of the cooling device.

Furthermore, the limiting plate which is oppositely arranged is provided with a limiting jack, and the top end of the supporting structure is provided with a limiting matching hole;

the limiting matching holes are arranged between the limiting insertion holes which are oppositely arranged, and the limiting plates are connected with the supporting structure through fixing pins.

Further, the cooling device comprises a heat exchange assembly and a precooling module, and the ventilation structure comprises a first ventilation structure and a second ventilation structure;

the first ventilation structures are arranged on two sides of the heat exchange assembly, and the second ventilation structures are arranged on two sides of the precooling module.

Further, the first ventilation structure is arranged in the length direction of the heat exchange assembly, and the height of the first ventilation structure is equal to that of the heat exchange assembly;

the second ventilating structure is arranged in the length direction of the pre-cooling module, and the height of the second ventilating structure is equivalent to that of the pre-cooling module.

Furthermore, the box body comprises an upper side plate of the upper box body and a lower side plate of the upper box body;

the precooling module is connected with the upper side plate of the upper box body, and the second ventilating structure is arranged on the upper side plate of the upper box body;

the heat exchange assembly is connected with the lower side plate of the upper box body, and the first ventilation structure is arranged on the lower side plate of the upper box body.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

1) The utility model has the advantages that the ventilation structure is arranged, so that the transformer oil in the heat exchange assembly and the precooling module is fully ventilated, the dry operation of the system is realized, the operation cost is saved, and the energy consumption is saved;

2) The utility model has the advantages that the precooling module is arranged, so that the heat absorption potential of air is fully utilized, and the cooling efficiency of the equipment is improved;

3) The utility model has the advantages that the air cooling component is arranged, the obvious cooling effect can be realized on the spray water, the heat exchange temperature difference between the spray water and the working medium in the heat exchange pipe is increased, and the manufacturing cost of the heat exchange pipe fitting can be effectively reduced;

4) The air cooling component adopted by the utility model is a detachable heat exchange component, the disassembly, assembly and maintenance operation through the air inlet are simple, the maintenance difficulty can be effectively reduced, the cleanliness of the air cooling component is improved, and the heat exchange between water and air is effectively ensured;

5) The utility model discloses an adopt the bellows, improved the turbulent degree of intraductal transformer oil, improved heat transfer coefficient, and outside of tubes sidelight is smooth, is difficult to pile up dirty, under the effect of shower water, the clean degree and the heat transfer coefficient of heat exchange tube further improve.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic diagram of a system in a forced oil circulation evaporative cooling transformer system with a ventilation structure;

FIG. 2 is a schematic diagram of a heat exchange tube structure of a heat exchange assembly in a forced oil circulation evaporative cooling transformer system provided with a ventilation structure;

FIG. 3 is a schematic cross-sectional view of a cooling device in a forced oil circulation evaporative cooling transformer system with a ventilation structure;

FIG. 4 is a schematic diagram of a heat exchange tube structure of a pre-cooling module in a forced oil circulation evaporative cooling transformer system with a ventilation structure;

FIG. 5 is a schematic side view of a cooling device in a forced oil circulation evaporative cooling transformer system with a ventilation structure;

FIG. 6 is a schematic view of the vent structure of FIG. 5 in an open position;

FIG. 7 is a schematic diagram of a ventilation structure in a forced oil circulation evaporative cooling transformer system provided with the ventilation structure;

FIG. 8 is a schematic diagram of a structure of a slot in a forced oil circulation evaporative cooling transformer system with a ventilation structure;

fig. 9 is a schematic side view of a pedestal structure in a forced oil circulation evaporative cooling transformer system provided with a ventilation structure.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solution in the embodiments, and the following embodiments are used to illustrate the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or 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.

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 construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

The embodiment describes a forced oil circulation evaporative cooling transformer system with a ventilation structure, as shown in fig. 1, comprising a transformer body 50, an oil inlet pipe 40, an oil outlet pipe 30, an oil-submerged pump 20 and a cooling device 10. The submersible pump 20 is arranged on the oil inlet pipe 40, and the transformer body 50 is connected with the cooling device 10 through the oil inlet pipe 40 and the oil outlet pipe 30. The cooling device 10 comprises a pre-cooling module 101 and a cooling module, the oil outlet pipe 30 is connected with the pre-cooling module 101, the oil inlet pipe 40 is connected with the heat exchange assembly 500, and the pre-cooling module 101 is connected with the heat exchange assembly 500 through a pipeline. The system operation process specifically comprises the following steps: the transformer oil flows in the transformer body 50, and absorbs the heat rise of the winding coil in the transformer body; the high-temperature transformer oil enters the pre-cooling module 101 of the cooling device 10 through the oil outlet pipe 30, exchanges heat with the air flowing out of the dehydration assembly 300, and is primarily cooled; then enters the heat exchange assembly 500, flows in the heat exchange pipeline, transfers heat to spray water and flowing air outside the heat exchange pipeline, and reduces the temperature; the low temperature transformer oil enters the transformer body 50 through the oil inlet pipe 40 under the action of the submersible pump 20 to absorb the heat of the winding coil, and the process is circulated. Air flows through the cooling module and the pre-cooling module 101 in sequence, transformer oil flows through the pre-cooling module 101 and the heat exchange assembly 500 in sequence, and counter flow is formed between the transformer oil and the air, so that the cooling potential of the air is fully utilized while the cooling purpose is achieved, and the cooling efficiency is improved.

As shown in fig. 3, the cooling device 10 includes a dewatering assembly 300 and a spraying assembly 400 arranged above and below, the pre-cooling module 101 is disposed above the dewatering assembly 300, and the heat exchange assembly 500 is disposed below the spraying assembly 400. The air current carries out the heat exchange with the water that sprays down from spray assembly 400 through heat exchange assembly 500 in-process, and the heat transfer includes latent heat and sensible heat, forms the one deck water film on cooling module surface through the flow of control shower water in this embodiment, and the water film is very thin, absorbs in the heat gasification of transformer oil in the heat exchange tube to the air that flows through. The humidity of the air is increased, a part of small liquid drops are carried away at the same time, the moisture carried in the air is greatly reduced after the air flows through the dehydration component 300, at the moment, the humidity of the air is reduced, the enthalpy value is reduced, and meanwhile, the transformer oil has large temperature difference and still has heat absorption capacity. The arrangement of the pre-cooling module can effectively utilize the heat absorption capacity of the air, and the cooling efficiency is improved under the condition that the power of the fan is not changed. Moreover, after the temperature in winter is reduced, because the humidity of the air flowing out of the dehydration assembly 300 is high, white fog is easily formed at the outlet of the fan assembly 200, the running environment of the transformer is influenced, the safe running of the transformer is not facilitated, and the arrangement of the precooling module can reduce or even eliminate the white fog phenomenon through heat exchange.

As shown in fig. 3, the pre-cooling module 101 includes a pre-cooling liquid inlet manifold 1011 and a pre-cooling liquid outlet manifold 1012, the heat exchange assembly 500 includes an inlet manifold 5201 and an outlet manifold 5301, and the pre-cooling liquid outlet manifold 1012 is connected to the inlet manifold 5201. The pre-cooling module 101 comprises a pre-cooling tube bundle, wherein the pre-cooling tube bundle comprises a plurality of pre-cooling tubes arranged in rows and a heat dissipation structure arranged on the pre-cooling tubes. As shown in fig. 4, the pre-cooling tube bundle is manufactured by processing an aluminum hot-rolled tube, and the heat dissipation structure is a heat dissipation fin integrally formed with the pre-cooling tube. No gap exists between the radiating fin and the pipe wall, no thermal resistance exists, and the heat transfer coefficient is higher.

Referring to fig. 5, the spray assembly 400, the dehydration assembly 300 and the heat exchange assembly 500 are assembled with the lower side plate 1302 of the upper box, and the fan assembly 200 and the pre-cooling module 101 are assembled with the upper side plate 1301 of the upper box. In the assembly process of the equipment, the assembly of the upper side plate 1301 of the upper box body, the fan assembly 200 and the precooling module 101, the assembly of the spraying assembly 400, the dewatering assembly 300, the heat exchange assembly 500 and the lower side plate 1302 of the upper box body are firstly completed respectively, then the assembled two parts are assembled into the upper box body 130, and finally the upper box body 130 is assembled with the lower box body 140.

The air cooling assembly 700 increases the contact area between air and spray water, can play an obvious cooling effect on the spray water, increases the heat exchange temperature difference between the spray water and working media in the heat exchange pipe, and can effectively reduce the manufacturing cost of heat exchange pipe fittings. In this embodiment, the air intake assembly 600 and the box body 100 are detachably connected, the heat exchange packing 700 and the box body 100 are detachably connected, and the air cooling assembly 700 can conveniently enter and exit through the installation position of the air intake assembly 600. The detachable structure is arranged, so that the air cooling assembly 700 is easy to disassemble, assemble and maintain, the maintenance difficulty can be effectively reduced, the cleanliness of the air cooling assembly 700 is improved, and the heat exchange efficiency between spray water and air is effectively guaranteed.

As shown in fig. 2, when a medium flows in the tube, the velocity and direction of the fluid are constantly changed due to disturbance of the wall corrugations, so that on one hand, the flow of the medium can form sufficient turbulence, and on the other hand, the difficulty of scaling on the inner wall of the tube is increased. Therefore, the total heat transfer coefficient can be improved after the corrugated pipe is adopted, the required heat exchange area is further reduced, materials can be saved under the condition of achieving the same heat exchange effect, the cost is finally reduced, and the weight of the equipment is also reduced. Compared with forced air cooling of transformer oil, the heat exchange assembly 500 adopts a light tube bundle for heat exchange, has a structure without fins outside, is not easy to scale and block, and reduces the maintenance cost of the heat exchange tube bundle.

Example two

In the embodiment, a forced oil circulation evaporative cooling transformer system with a ventilation structure is described, and the ventilation structure 102 is added to the embodiment five, as shown in fig. 5 to 9.

The temperature of the transformer oil is greatly influenced along with the load of the transformer and the environment, particularly in winter, when the environmental temperature is low, the strong oil circulation evaporation cooling transformer system can gradually close the spray water system and the fan system, and the cooling device 10 can meet the heat dissipation requirement after dry operation. However, due to uncontrollable factors such as local wind speed, in order to ensure that the transformer oil in the heat dissipation pipeline and the air outside the pipeline have sufficient ventilation amount in dry operation, a ventilation structure 102 is additionally arranged on the cooling device 10 in the embodiment. The cooling device 10 includes a box 100, and a ventilation structure 102 is disposed on a side wall of the box 100 and can be opened and closed, as shown in fig. 5 and 6.

The ventilation structure 102 comprises a ventilation opening 1021 and a ventilation plate 1022, wherein the ventilation opening 1021 is arranged on the wall surface of the box body 100, and the ventilation plate 1022 is connected with the box body 100 through a rotating shaft and can be covered on the ventilation opening 1021 in an opening and closing manner.

The inner wall surface of the ventilation plate 1022 is provided with a support structure 1023, the lower edge of the ventilation opening 1021 is provided with a support structure 1024, and the support structure 1023 is connected with the support structure 1024 in a clamping manner, as shown in fig. 6 and 7.

Still be equipped with the draw-in groove on ventilation board 1022's the internal wall face, support structure 1023's one end and ventilation board 1022 between articulated, during ventilation board 1022 closed condition, support structure 1023's the other end is fixed on draw-in groove 1025, during ventilation board 1022 opened condition, support structure 1023's the other end is fixed on support structure 1024.

In order to save space on the ventilation board 1022 occupied by the support structure, the support structure is a retractable support rod, as shown in fig. 7.

The support structure 1024 includes a fixing plate 1024a and a limiting plate 1024b, and the fixing plate 1024a is a straight plate and is fixedly connected to the inner wall of the box body at the lower edge of the ventilation opening 1021. The limiting plates 1024b are disposed on two sides of the fixing plate 1024a, and are a pair of side plates formed by bending and extending two side edges of the fixing plate 1024a towards the inside of the cooling device 10.

As shown in fig. 9, the opposite limiting plate 1024b is provided with a limiting insertion hole 1024c, the top end of the supporting structure 1023 is provided with a limiting engagement hole 1023a, as shown in fig. 7, the limiting engagement hole 1023a is placed between the opposite limiting insertion holes 1024c, the limiting plate 1024 and the supporting structure 1023 are connected by a fixing pin 1025, and other fixing manners such as screws can be selected.

The cooling device 10 includes a heat exchange assembly 500 and a pre-cooling module 101, the ventilation mechanism 102 includes a first ventilation structure 102a and a second ventilation structure 102b, the first ventilation structure 102a is disposed on two sides of the heat exchange assembly 500, and the second ventilation structure 102b is disposed on two sides of the pre-cooling module 101, as shown in fig. 6.

With reference to fig. 1 and 6, the first ventilation structure 102a is disposed in the length direction of the heat exchange assembly 500, and the height thereof is equivalent to the height of the heat exchange assembly; the second ventilating structure 102b is arranged in the length direction of the pre-cooling module 101, and the height of the second ventilating structure is equal to the height of the pre-cooling module 101. The open state of the ventilation structure 102 can be ensured, and the precooling module 101 and the heat exchange assembly 500 are ensured not to be shielded.

As shown in fig. 5, the case 100 includes an upper case upper side plate 1301 and an upper case lower side plate 1302; the precooling module is connected with the upper side plate 1301 of the upper box body, and the second ventilating structure 102b is arranged on the upper side plate 1301 of the upper box body; the heat exchange assembly 500 is connected to the lower side plate 1302 of the upper box body, and the first ventilation structure 102a is disposed on the lower side plate of the upper box body.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments by utilizing the above technical contents without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical matters of the present invention are within the scope of the present invention.

Claims (10)

1. A forced oil circulation evaporative cooling transformer system with a ventilation structure comprises a transformer body; an oil inlet pipe and an oil outlet pipe; the oil-submerged pump is arranged on the oil inlet pipe; the cooling device is connected with the transformer body through the oil inlet pipe and the oil outlet pipe; the method is characterized in that:

the cooling device comprises a box body, and a ventilation structure capable of being opened and closed is arranged on the side wall of the box body.

2. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 1, wherein: the ventilation structure comprises a ventilation opening and a ventilation plate, the ventilation opening is formed in the wall surface of the box body, the ventilation plate is connected with the box body through a rotating shaft, and the ventilation opening can be covered with the ventilation plate in an opening and closing mode.

3. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 2, wherein: a support structure is arranged on the inner wall surface of the ventilation plate, and a support structure is arranged at the lower edge of the ventilation opening; the supporting structure is connected with the support structure in a clamping mode.

4. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 3, wherein: the inner wall surface of the ventilating plate is also provided with a clamping groove;

one end of the supporting structure is hinged to the ventilation plate, the other end of the supporting structure is fixed to the clamping groove when the ventilation plate is in a closed state, and the other end of the supporting structure is fixed to the support structure when the ventilation plate is in an open state.

5. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure according to any one of claims 3 or 4, characterized in that: the supporting structure is a telescopic supporting rod.

6. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 3, wherein:

the support structure comprises a fixing plate and a limiting plate, wherein the fixing plate is a straight plate and is fixedly connected with the inner wall surface of the box body at the lower edge of the ventilation opening;

the limiting plates are arranged on two sides of the fixing plate and are a pair of side plates formed by bending and extending the edges of the two sides of the fixing plate towards the inside of the cooling device.

7. A forced oil circulation evaporative cooling transformer system with ventilation structure as claimed in claim 6, characterized in that:

the limiting plate is oppositely arranged and is provided with a limiting jack, and the top end of the supporting structure is provided with a limiting matching hole; the limiting matching holes are arranged between the limiting insertion holes which are oppositely arranged, and the limiting plates are connected with the supporting structure through fixing pins.

8. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 1, wherein: the cooling device comprises a heat exchange assembly and a precooling module, and the ventilation structure comprises a first ventilation structure and a second ventilation structure;

the first ventilation structures are arranged on two sides of the heat exchange assembly, and the second ventilation structures are arranged on two sides of the precooling module.

9. The forced oil circulation evaporative cooling transformer system with the ventilation structure as claimed in claim 8, wherein:

the first ventilation structure is arranged in the length direction of the heat exchange assembly, and the height of the first ventilation structure is equal to that of the heat exchange assembly; the second ventilation structure is arranged in the length direction of the pre-cooling module, and the height of the second ventilation structure is equivalent to that of the pre-cooling module.

10. A forced oil circulation evaporative cooling transformer system provided with a ventilation structure as claimed in claim 9, wherein:

the box body comprises an upper box body upper side plate and an upper box body lower side plate;

the precooling module is connected with the upper side plate of the upper box body, and the second ventilating structure is arranged on the upper side plate of the upper box body;

the heat exchange assembly is connected with the lower side plate of the upper box body, and the first ventilation structure is arranged on the lower side plate of the upper box body.

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