CN219321130U - Open-close temperature adjusting mechanism and transformer with same - Google Patents

Abstract

The utility model discloses an opening and closing temperature regulating mechanism, which relates to the technical field of transformers and comprises the following components: the device comprises a protective box, a temperature sensor and an air pump. The air pump is controlled to start through the temperature sensor, the opening plate is pushed to move laterally, the heat dissipation opening of the protective box is opened to communicate with the outside, and the outside air is caused to exchange heat with the accommodating bin through the heat dissipation opening, so that the temperature of the transformer body is reduced. The first aspect adopts the temperature sensor to detect the temperature, which is beneficial to controlling the opening and closing of the opening and closing plate in a safe temperature range, and realizes the cooling; in the second aspect, the opening and closing plate is positioned on the outer side surface of the heat radiation opening, and is beneficial to blocking external sand, dust and rainwater from entering the heat radiation opening from the inclined side under the driving of wind power when the temperature is reduced, and finally entering the accommodating bin to erode the transformer body; in the third aspect, the inner surfaces of the stress rod opening and closing plates are connected, the inner surfaces of the opening and closing plates are attached to the outer side surfaces of the heat dissipation openings, therefore, under the non-cooling condition, the wind, sand and rainwater are difficult to invade the sliding connection point of the stress rod and the protective box body.

Description

Open-close temperature adjusting mechanism and transformer with same

Technical Field

The utility model relates to the technical field of transformers, in particular to an opening and closing temperature adjusting mechanism.

Background

A Transformer (Transformer) is a device for changing an ac voltage using the principle of electromagnetic induction, and the main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformers), and the like.

The patent number CN201910381618.X discloses a power electrical transformer with self-cooling function, which comprises a box body, the inside baffle that is fixed with of box, the baffle is divided into working chamber and heat dissipation room with the box, be fixed with the transformer body in the working chamber, the top of transformer body is provided with temperature sensor, be fixed with servo motor in the heat dissipation room, servo motor's output shaft is fixed with the lead screw, threaded connection has drive nut on the lead screw, drive nut inlays on the push pedal, the both sides of push pedal are fixed with the push rod, the tip of push rod is fixed with the baffle, be provided with a plurality of louvres on the baffle, baffle and the side end in close contact with of box, the inside upper and lower both sides of heat dissipation room all are provided with cooling mechanism, the lower extreme four corners position of box all is provided with supporting mechanism.

The cooling structure through above-mentioned patent scheme has realized automatic, the quick heat dissipation cooling of transformer, improves life. However, most working environments of the transformer are outdoor, and need to face low temperature and high temperature changes, and also need to face severe weather environments such as invasion of wind sand and rainwater, so the cooling structure of the above patent scheme needs further improvement, for example, outdoor closed protection cannot be performed at normal temperature or low temperature, effective cooling can be performed at high temperature, and invasion of wind sand and rainwater can be resisted to a certain extent during cooling, which will affect the use of the transformer.

Disclosure of Invention

The utility model aims to solve the problem that a cooling structure of a transformer in the prior art cannot carry out outdoor closed protection at normal temperature or low temperature, and can effectively cool at high temperature.

The second object of the present utility model is to provide a transformer with an open-close temperature adjusting mechanism.

The third objective of the present utility model is to provide a method for controlling temperature.

In order to achieve one of the above purposes, the present utility model adopts the following technical scheme: an open-close temperature regulating mechanism, comprising: the device comprises a protective box, a temperature sensor and an air pump.

A protective housing having therein: the device comprises a containing bin, a heat dissipation port, an opening and closing plate, an air pressure cavity, a piston and a stress rod.

The accommodating bin is used for accommodating and installing the transformer body, the radiating opening is communicated with the accommodating bin and the outside, and the inner surface of the opening and closing plate is attached to the outer side of the radiating opening so as to seal the communication between the radiating opening and the outside.

The air pressure cavities are distributed on the periphery of the heat dissipation opening. The piston is movably connected with the air pressure cavity, one end of the stress rod is connected with the inner surface of the opening and closing plate, and the other end of the stress rod is connected with the piston.

The temperature sensor is installed on the accommodating bin and used for detecting the working temperature of the transformer body. The air pump is connected with the temperature sensor in a wired or wireless communication mode, and is provided with an air inlet pipeline which is communicated with the air pressure cavity.

In the technical scheme, when the transformer body is installed in the accommodating bin of the protective box during use, the temperature sensor is used for controlling the air pump to start after detecting that the working temperature generated by the transformer body exceeds the temperature threshold set by the temperature sensor, so that the air pump can introduce air into the air pressure cavity of the protective box through the air inlet pipeline.

After the pressure of the air pressure cavity rises, the piston is pushed to slide along the air pressure cavity, so that the piston pushes the stress rod and the opening and closing plate connected to the stress rod to move laterally, the opening and closing plate moves and then opens the heat dissipation port of the protective box to communicate with the outside, and heat exchange is carried out through the outside air and the accommodating bin, so that the temperature of the transformer body is reduced.

In the cooling process, the opening and closing plate is positioned on the outer side face of the heat dissipation opening, and when the air, sand and rain weather is faced, the opening and closing plate blocks dust, sand and grains or rain from entering the heat dissipation opening from the side face under the blowing of wind.

When temperature sensor detects that the operating temperature that the transformer body produced is less than temperature sensor's temperature threshold value that sets for the back, through temperature sensor control air pump start for the air pump passes through the air inlet duct extraction atmospheric pressure chamber's air, makes the atmospheric pressure chamber produce negative pressure, and the pulling piston slides along the atmospheric pressure chamber and resets, and then makes piston pulling stress bar and the board that opens and shuts side and move and reset, makes the intercommunication of board shutoff thermovent and external again that opens and shuts, finally realizes sealing the protective housing, forms the protection to the transformer body.

Further, in the embodiment of the present utility model, a filter layer is disposed in the heat dissipation port, for filtering particulate matters in the air.

Still further, in an embodiment of the present utility model, the filter layer includes curved cross filaments and longitudinal filaments, the cross filaments and the longitudinal filaments have elasticity, the cross filaments and the longitudinal filaments are interlaced together along different directions, and the cross filaments and the longitudinal filaments are not fixed together by a fixed connection manner.

After the heat dissipation opening is communicated with the outside, the outside air is filtered through the heat dissipation opening and the accommodating bin in the heat exchange process, the filter layer of the heat dissipation opening is fully attached with dust particles on the filter layer, so that the pressure of the accommodating bin and the outside air is unbalanced after the ventilation of the filter layer is reduced, the filter layer is stressed by the elastic transverse wires and the elastic longitudinal wires in the filter layer, the filter layer is deformed after being stressed, the curved transverse wires and the curved longitudinal wires are straightened, the mutual positions between the transverse wires and the longitudinal wires are changed in the straightening process, the positions of the fine holes formed by the transverse wires and the longitudinal wires are also changed, the dust particles of the filter layer are extruded, the dust particles fall, the ventilation of the filter layer is restored, and the loss of the cooling performance of the transformer body is effectively reduced.

Further, in the embodiment of the utility model, the outward port of the heat dissipation port is in an enlarged conical structure, so that dust particles and rainwater are not easy to accumulate at the heat dissipation port.

Further, in the embodiment of the utility model, at least one layer of rubber sealing gasket is attached to the inner surface of the opening and closing plate, so as to enhance the sealing performance of the heat dissipation port.

Still further, in the embodiment of the present utility model, the center of the opening plate is a solid or the center of the opening plate is a hollow structure, and an exhaust fan is installed at the hollow structure, and the heat of the transformer body installed in the accommodating bin is extracted by the exhaust fan, so as to realize cooling.

Still further, in an embodiment of the present utility model, a sliding cavity is provided in the opening board, a conductive sheet is installed in the sliding cavity, the conductive sheet is electrically connected with the exhaust fan, the sliding cavity is movably connected with a limiting board, the stress rod penetrates into the sliding cavity to be connected with the limiting board, an electricity obtaining sheet is provided on the limiting board, the electricity obtaining sheet is connected with a power supply, and a gap is provided between the electricity obtaining sheet and the conductive sheet.

The electric sheet is contacted with the conducting strip through the pushing of the stress rod, so that the exhaust fan is electrically started, and the heat of the transformer body in the accommodating bin is extracted to cool. Cooperate with temperature sensor, effectively, accurate realization cooling.

The beneficial effects of the utility model are as follows:

according to the utility model, the air pump is controlled to be started through the temperature sensor, so that the pressure of the air pressure cavity rises to push the opening and closing plate to laterally move, the heat dissipation port of the protective box is opened to be communicated with the outside, the outside air is caused to exchange heat with the accommodating bin through the heat dissipation port, and the transformer body in the accommodating bin is cooled. In the process, the temperature sensor is adopted for temperature detection in the first aspect, so that the opening and closing of the opening and closing plate can be controlled stably in a controllable and safe temperature range, and the cooling is realized; in the second aspect, the opening and closing plate is positioned on the outer side surface of the heat radiation port, and even when the temperature is reduced in windy, sandy and rainy weather, the opening and closing plate can block outside sand, dust and rainwater from entering the heat radiation port from the inclined side under the drive of wind power, and finally enters the accommodating bin to erode the transformer body; in the third aspect, the inner surfaces of the stress rod opening and closing plates are connected, and the inner surfaces of the opening and closing plates are attached to the outer side surfaces of the heat dissipation openings, so that the sliding connection points of the stress rods and the protective box body are sealed under the non-cooling condition, namely, the sliding connection points of the stress rods and the protective box body are difficult to be invaded by wind, sand and rainwater. The transformer cooling structure solves the problems that in the prior art, the cooling structure of the transformer cannot carry out outdoor closed protection at normal temperature or low temperature, and the transformer is effectively cooled when the temperature is high.

In order to achieve the second purpose, the utility model adopts the following technical scheme: a transformer is provided with the opening-closing temperature adjusting mechanism in one of the above objects.

Further, in the embodiment of the utility model, the transformer body is installed in the accommodating bin, and the transformer body is provided with cooling fins.

Further, in the embodiment of the utility model, the transformer body is also connected with a conservator, the conservator is connected with a breather pipe, and a respirator is arranged below the breather pipe.

Still further, in an embodiment of the present utility model, the respirator includes an outer barrel and an inner barrel with a foam layer and colored silica gel therebetween.

The inner cylinder is rotatably connected with a reaction plate, the reaction plate seals the lower end of the inner cylinder, a biasing spring is arranged at the rotary connection position of the reaction plate, and a drying layer is arranged at the upper end of the inner cylinder.

The two sides of the reaction plate are semicircular, and a rubber layer is arranged at the semicircular part. The sealing of the reaction plate to the inner cylinder is enhanced through the elastic expansion of the rubber layer.

The breather is also called a moisture-proof breather of a transformer, and is mainly used for enabling the oil conservator to be communicated with the outside to keep the internal and external air pressures equal, so that the transformer oil injection caused by the fact that the volume of the transformer oil is increased due to temperature rise in high-temperature weather or full-load operation is prevented. The specific reasons are as follows: because of expansion with heat and contraction with cold, the temperature of the transformer oil in the oil conservator can change, when the temperature of the transformer oil rises, the volume of the oil is increased, the air in the transformer oil conservator is compressed, the pressure is increased, and in order to maintain the pressure balance in the transformer, part of the air in the oil conservator is discharged into the atmosphere through a respirator; when transformer oil cools down, the volume of oil reduces, and the air in the conservator is expanded, and pressure reduces, in order to maintain the pressure balance in the conservator, the pressure in the conservator will inhale the air through the respirator, and the moisture impurity in the entering air is absorbed through the dry layer of the built-in respirator here, prevents moist air and directly gets into in the transformer oil conservator, makes transformer oil wet.

However, as the transformer is mainly installed outdoors, especially in places with poor environment, and more impurities such as dust in the air in recent years are added, the situation that the breather is blocked and blocked can occur when the breather is used for a long time, and then the explosion-proof membrane bursts, even the transformer is seriously damaged. In order to solve the problem, the rotatable reaction plate is arranged in the inner cylinder of the respirator, when the temperature of transformer oil rises, air in the oil conservator is compressed, when the pressure of gas is increased, the gas pushes the reaction plate to rotate, the biasing spring is compressed, so that part of air in the oil conservator is discharged into the atmosphere through the respirator, and after the completion, the reaction plate is reset under the action of the biasing spring; when the transformer oil is cooled, the air in the oil conservator is expanded, when the gas pressure is reduced to generate negative pressure, the reaction plate is pulled to rotate to compress the biasing spring, so that the outside air is sucked into the oil conservator, and in the process, the drying layer dehumidifies the sucked air.

In the normal state, the reaction plate plugs the inner cylinder at all times, so that external air is prevented from entering the inner cylinder, and dust particles plug the drying layer and other layered structures. When the pressure of the conservator changes, the reaction plate can open the inner cylinder again, so that the functions of discharging and sucking air are realized, and the situation that the respirator is blocked and dead when the respirator is used for a long time is slowed down. And when discharging and sucking air, the reaction pressure of the reaction plate to the gas is realized by the biasing spring, so that the balance of discharging and sucking air is facilitated, the condition that the pressure required by discharging air is high and the pressure required by sucking air is small can not be generated. In addition, through the mode of sealing the inner barrel in the normal state, the meaningless dehumidification of the drying layer can be avoided, and the frequency of replacing the drying layer is reduced.

In order to achieve the third purpose, the utility model adopts the following technical scheme: the open-close temperature adjusting method is applied to the open-close temperature adjusting mechanism in one of the purposes or the transformer in the other of the purposes, and comprises the following steps:

the method comprises the steps that a transformer body is arranged in a containing bin of a protective box, and when a temperature sensor detects that the working temperature generated by the transformer body exceeds a temperature threshold set by the temperature sensor, an air pump is controlled to be started by the temperature sensor, so that air is introduced into an air pressure cavity of the protective box through an air inlet pipeline by the air pump;

after the pressure of the air pressure cavity is increased, the piston is pushed to slide along the air pressure cavity, so that the piston pushes the stress rod and the opening and closing plate connected to the stress rod to move laterally, the opening and closing plate is opened to communicate a heat dissipation port of the protective box with the outside after moving, and heat exchange is carried out between the outside air and the accommodating bin to cool the transformer body;

in the cooling process, the opening and closing plate is positioned on the outer side surface of the heat dissipation opening, and when the air, sand and rain are blown by wind, dust and sand particles or rain are prevented from entering the heat dissipation opening from the side surface by the opening and closing plate;

when temperature sensor detects that the operating temperature that the transformer body produced is less than temperature sensor's temperature threshold value that sets for the back, through temperature sensor control air pump start for the air pump passes through the air inlet duct extraction atmospheric pressure chamber's air, makes the atmospheric pressure chamber produce negative pressure, and the pulling piston slides along the atmospheric pressure chamber and resets, and then makes piston pulling stress bar and the board that opens and shuts side and move and reset, makes the intercommunication of board shutoff thermovent and external again that opens and shuts, finally realizes sealing the protective housing, forms the protection to the transformer body.

Further, in the embodiment of the utility model, after the heat dissipation port is communicated with the outside, in the heat exchange process of the outside air through the heat dissipation port and the accommodating bin, the filter layer of the heat dissipation port can filter the outside air, after the filter layer is fully adhered with dust particles, the pressure of the accommodating bin and the outside air is unbalanced, the filter layer is pressurized, the filter layer is deformed after being pressurized by the transverse wires and the longitudinal wires which are elastically arranged in the filter layer, and after the deformation, the curved transverse wires and the longitudinal wires are straightened, the mutual positions between the transverse wires and the longitudinal wires are changed in the straightening process, and the positions of the fine holes formed by the transverse wires and the longitudinal wires are also changed, so that dust particles of the filter layer are extruded, the dust particles fall down, the ventilation of the filter layer is restored, and the loss of the cooling performance of the transformer body is effectively reduced.

Drawings

Fig. 1 is a schematic diagram of a transformer with an open-close temperature adjusting mechanism according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of a detail structure of an open-close temperature adjusting mechanism according to an embodiment of the utility model.

Fig. 3 is a schematic diagram illustrating a movement effect of the opening/closing temperature adjusting mechanism according to an embodiment of the present utility model.

FIG. 4 is a schematic diagram of a filter layer according to an embodiment of the present utility model.

Fig. 5 is a schematic diagram of a detail structure of another opening-closing temperature adjusting mechanism according to an embodiment of the utility model.

Fig. 6 is a schematic diagram showing a detailed structure of an opening and closing plate according to an embodiment of the present utility model.

FIG. 7 is a schematic view of a respirator of an embodiment of the present utility model.

FIG. 8 is a schematic view of the athletic performance of a respirator of an embodiment of the present utility model.

In the accompanying drawings

10. Protective box 11, accommodating bin 12 and heat dissipation port

13. Opening plate 131, sealing gasket 132 and sliding cavity

133. Conductive sheet 134, suction fan 14, and pneumatic chamber

15. Piston 16, stress rod 161 and limiting plate

162. Electric sheet

20. Temperature sensor

30. Air pump 31 and air intake pipe

40. Filter layer 41, transverse threads 42 and longitudinal threads

50. Respirator 51, outer cylinder 52 and inner cylinder

53. Foam layer 54, colored silica gel 55, and reaction plate

56. Bias spring 57, dry layer

100. Transformer body 101, radiating fin 102 and conservator

103. Vent pipe

Detailed Description

In order to make the objects, technical solutions, and advantages of the present utility model more apparent, the embodiments of the present utility model will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present utility model, are intended to be illustrative only and not limiting of the embodiments of the present utility model, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

In the description of the present utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "a," an, "" the first, "" the second, "" the third, "" the fourth, "" the fifth, "and the sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

For purposes of brevity and description, the principles of the embodiments are described primarily by reference to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is apparent that. It will be apparent to one of ordinary skill in the art that the embodiments may be practiced without limitation to these specific details. In some instances, well known open-close attemperation methods and structures have not been described in detail to avoid unnecessarily obscuring such embodiments. In addition, all embodiments may be used in combination with each other.

Embodiment one:

an open-close temperature regulating mechanism, as shown in fig. 1, comprises: a protective box 10, a temperature sensor 20 and an air pump 30.

As shown in fig. 2, the protection box 10 includes: the device comprises a containing bin 11, a heat dissipation port 12, an opening and closing plate 13, an air pressure cavity 14, a piston 15 and a stress rod 16.

As shown in fig. 1 and 2, the accommodating chamber 11 is used for accommodating and mounting the transformer body 100, the heat dissipation port 12 communicates with the accommodating chamber 11 and the outside, and the inner surface of the opening and closing plate 13 is attached to the outer side of the heat dissipation port 12 to seal the communication between the heat dissipation port 12 and the outside.

The air pressure chambers 14 are distributed around the periphery of the heat sink 12. The piston 15 is movably connected with the air pressure cavity 14, one end of the stress rod 16 is connected with the inner surface of the opening and closing plate 13, and the other end of the stress rod 16 is connected with the piston 15.

The temperature sensor 20 is installed on the accommodating bin 11 for detecting an operating temperature of the transformer body 100. The air pump 30 is connected with the temperature sensor 20 in a wired or wireless communication mode, the air pump 30 is provided with an air inlet pipeline 31, and the air inlet pipeline 31 is communicated with the air pressure cavity 14.

The implementation steps are as follows:

when the transformer body 100 is used, the transformer body 100 is arranged in the accommodating bin 11 of the protective box 10, and when the temperature sensor 20 detects that the working temperature generated by the transformer body 100 exceeds the temperature threshold set by the temperature sensor 20, the air pump 30 is controlled to be started by the temperature sensor 20, so that the air pump 30 can introduce air into the air pressure cavity 14 of the protective box 10 through the air inlet pipeline 31.

As shown in fig. 3, after the pressure of the air pressure cavity 14 is increased, the piston 15 is pushed to slide along the air pressure cavity 14, so that the piston 15 pushes the stress rod 16 and the opening and closing plate 13 connected to the stress rod 16 to move laterally, the opening and closing plate 13 is moved to open the heat dissipation port 12 of the protection box 10 to communicate with the outside, and heat exchange is performed between the outside air and the accommodating bin 11, so as to cool the transformer body 100.

In the cooling process, the opening and closing plate 13 is located on the outer side face of the heat dissipation opening 12, and when the weather of wind, sand and rain is faced, the opening and closing plate 13 blocks dust and sand particles or rain from entering the heat dissipation opening 12 from the side face under the blowing of wind.

When the temperature sensor 20 detects that the working temperature generated by the transformer body 100 is lower than the temperature threshold set by the temperature sensor 20, the air pump 30 is controlled to be started by the temperature sensor 20, so that the air pump 30 extracts the air in the air pressure cavity 14 through the air inlet pipeline 31, the air pressure cavity 14 generates negative pressure, the piston 15 is pulled to slide and reset along the air pressure cavity 14, the piston 15 is further pulled to slide and reset the stress rod 16 and the opening and closing plate 13, the opening and closing plate 13 is enabled to close the heat dissipation opening 12 and the outside again, and finally the protection box 10 is closed, so that the transformer body 100 is protected.

According to the utility model, the air pump 30 is controlled to be started through the temperature sensor 20, so that the pressure of the air pressure cavity 14 rises to push the opening plate 13 to move laterally, the heat dissipation port 12 of the protective box 10 is opened to be communicated with the outside, the outside air is caused to exchange heat with the accommodating bin 11 through the heat dissipation port 12, and the temperature of the transformer body 100 in the accommodating bin 11 is reduced. In the process, the temperature sensor 20 is adopted for temperature detection in the first aspect, so that the opening and closing of the opening and closing plate 13 can be controlled stably in a controllable and safe temperature range, and the cooling is realized; in the second aspect, the opening and closing plate 13 is located on the outer side surface of the heat dissipation port 12, and even when the temperature is reduced in windy, sandy and rainy weather, the opening and closing plate 13 can block external sand and rain from entering the heat dissipation port 12 from the inclined side under the driving of wind power, and finally enters the accommodating bin 11 to erode the transformer body 100; in the third aspect, the inner surface of the opening and closing plate 13 of the stress rod 16 is connected, and the inner surface of the opening and closing plate 13 is attached to the outer side surface of the heat dissipation port 12, so that the sliding connection point of the stress rod 16 and the box body of the protection box 10 is sealed under the non-cooling condition, that is, the sliding connection point of the stress rod 16 and the box body of the protection box 10 is difficult to be invaded by wind, sand and rain. The transformer cooling structure solves the problems that in the prior art, the cooling structure of the transformer cannot carry out outdoor closed protection at normal temperature or low temperature, and the transformer is effectively cooled when the temperature is high.

As shown in fig. 2 and 4, a filter layer 40 is provided in the heat dissipation port 12 for filtering particulate matters in the air. The filter layer 40 comprises curved transverse filaments 41 and longitudinal filaments 42, the transverse wires 41 and the longitudinal wires 42 have elasticity, and the transverse wires 41 and the longitudinal wires 42 are staggered together along different directions, and the transverse wires 41 and the longitudinal wires 42 are not fixed together in a fixed connection mode.

After the heat dissipation port 12 is communicated with the outside, in the heat exchange process of the heat dissipation port 12 and the accommodating bin 11, the filter layer 40 of the heat dissipation port 12 filters the outside air, when the filter layer 40 is fully attached with dust particles, the pressure of the accommodating bin 11 and the outside air is unbalanced after the ventilation of the filter layer 40 is reduced, the filter layer 40 is pressurized by the transverse wires 41 and the longitudinal wires 42 which are arranged in the filter layer 40, the filter layer 40 is deformed after being pressurized, after the deformation, the curved transverse wires 41 and the longitudinal wires 42 are straightened, the mutual positions between the transverse wires 41 and the longitudinal wires 42 are changed, and the positions of the fine holes formed by the transverse wires 41 and the longitudinal wires 42 are also changed, so that the dust particles of the filter layer 40 are extruded, the dust particles fall down, the ventilation of the filter layer 40 is restored, and the loss of the cooling performance of the transformer body 100 is effectively reduced.

As shown in fig. 2, the outward facing ports of the heat sink 12 are of an enlarged conical configuration so that dust particles and rain water are less likely to accumulate at the heat sink 12.

At least one rubber gasket 131 is attached to the inner surface of the opening plate 13 to enhance sealing property against the heat radiation port 12.

As shown in fig. 5 and 6, the center of the opening and closing plate 13 is a solid body or the center of the opening and closing plate 13 is a hollow structure, an exhaust fan 134 is installed at the hollow structure, and the heat of the transformer body 100 installed in the accommodating bin 11 is extracted through the exhaust fan 134, so that the temperature is reduced.

The opening plate 13 is provided with a sliding cavity 132, a conductive sheet 133 is arranged in the sliding cavity 132, the conductive sheet 133 is electrically connected with the exhaust fan 134, the sliding cavity 132 is movably connected with a limiting plate 161, the stress rod 16 penetrates into the sliding cavity 132 to be connected with the limiting plate 161, the limiting plate 161 is provided with an electricity obtaining sheet 162, the electricity obtaining sheet 162 is connected with a power supply, and a gap is reserved between the electricity obtaining sheet 162 and the conductive sheet 133.

The electricity obtaining sheet 162 is in contact with the conductive sheet 133 through pushing of the stress rod 16, so that the exhaust fan 134 is electrically started, and heat of the transformer body 100 in the accommodating bin 11 is extracted to cool. Cooperate with the temperature sensor 20 to effectively and accurately realize temperature reduction.

Embodiment two:

as shown in fig. 1, the transformer has the opening-closing temperature adjusting mechanism in the first embodiment.

As shown in fig. 1, a transformer body 100 is installed in the accommodating chamber 11, and a heat sink 101 is provided on the transformer body 100. The transformer body 100 is also connected with a conservator 102, the conservator 102 is connected with a breather pipe 103, and the breather pipe 50 is arranged below the breather pipe 103.

Embodiment III:

as shown in fig. 1, 7 and 8, the transformer is provided with a respirator 50, the respirator 50 comprises an outer cylinder 51 and an inner cylinder 52, and a foam layer 53 and colored silica gel 54 are arranged between the outer cylinder 51 and the inner cylinder 52.

A reaction plate 55 is rotatably connected in the inner cylinder 52, the reaction plate 55 seals the lower end of the inner cylinder 52, a biasing spring 56 is arranged at the rotary connection position of the reaction plate 55, and a drying layer 57 is arranged at the upper end of the inner cylinder 52.

The reaction plate 55 has a semicircular shape on both sides, and a rubber layer is provided at the semicircular position. The sealing of the reaction plate 55 against the inner cylinder 52 is enhanced by the elastic expansion and contraction of the rubber layer.

The breather 50 (introduced in the prior art) is called a transformer moisture-proof breather 50, also called a moisture absorber, and is mainly used for enabling the oil conservator 102 to be communicated with the outside to keep the internal and external air pressures equal, so as to prevent the transformer oil from being injected due to the fact that the volume of the transformer oil is increased due to temperature rise in high-temperature weather or full-load operation. The specific reasons are as follows: as the transformer oil temperature in the oil conservator 102 changes due to expansion with heat and contraction with cold, when the transformer oil is heated, the volume of the oil increases, the air in the transformer oil conservator 102 is compressed, the pressure increases, and in order to maintain the pressure balance in the transformer, part of the air in the oil conservator 102 is discharged into the atmosphere through the breather 50; when the transformer oil is cooled, the volume of the oil is reduced, the air in the oil conservator 102 is expanded, the pressure is reduced, and in order to maintain the pressure balance in the oil conservator 102, the pressure in the oil conservator 102 is used for sucking air through the breather 50, and moisture impurities in the air are absorbed by a drying layer 57 arranged in the breather 50, so that the moist air is prevented from directly entering the oil conservator 102, and the transformer oil is damped.

However, the transformer is mainly installed outdoors, especially in places with poor environment, and in addition, in recent years, dust and other impurities in the air are more and more increased, so that the breather 50 can be blocked and dead during long-term use, and further the explosion-proof membrane bursts, and even the transformer is seriously damaged. In order to solve the problem, the rotatable reaction plate 55 is arranged in the inner cylinder 52 of the respirator 50, when the temperature of transformer oil rises, air in the oil conservator 102 is compressed, when the pressure of gas is promoted to increase, the gas pushes the reaction plate 55 to rotate, the biasing spring 56 is compressed, so that part of air in the oil conservator 102 is discharged into the atmosphere through the respirator 50, and after the completion, the reaction plate 55 is reset under the action of the biasing spring 56; when the transformer oil is cooled, air in the oil conservator 102 is expanded, when negative pressure is generated when the gas pressure is reduced, the reaction plate 55 is pulled to rotate, the biasing spring 56 is compressed, and external air is sucked into the oil conservator 102, and in the process, the drying layer 57 dehumidifies the sucked air.

In a normal state, the reaction plate 55 seals the inner cylinder 52 at all times, so that external air is prevented from entering the inner cylinder 52, and dust particles are prevented from blocking the drying layer 57 and other layered structures. When the pressure of the oil conservator 102 changes, the reaction plate 55 can open the inner cylinder 52 again, so that the functions of discharging and sucking air are realized, and the situation that the respirator 50 is blocked when being used for a long time is slowed down. And when discharging and sucking air, the reaction pressure of the reaction plate 55 to the gas is realized by the biasing spring 56, which is beneficial to balance the discharging and sucking air, and the condition that the pressure required by discharging air is high and the pressure required by sucking air is small can not be generated. In addition, by normally closing the inner tube 52, the desiccant layer 57 is prevented from meaningless dehumidification, and the frequency of replacing the desiccant layer 57 is reduced.

The other features and technical effects of the transformer of the present embodiment are the same as those of the embodiment.

Embodiment four:

the opening and closing temperature adjusting method is applied to the opening and closing temperature adjusting mechanism in the first embodiment or the transformer in the second embodiment, and comprises the following steps:

the transformer body 100 is arranged in the accommodating bin 11 of the protective box 10, and when the temperature sensor 20 detects that the working temperature generated by the transformer body 100 exceeds the temperature threshold set by the temperature sensor 20, the air pump 30 is controlled to be started by the temperature sensor 20, so that the air pump 30 can introduce air into the air pressure cavity 14 of the protective box 10 through the air inlet pipeline 31;

after the pressure of the air pressure cavity 14 is increased, the piston 15 is pushed to slide along the air pressure cavity 14, so that the piston 15 pushes the stress rod 16 and the opening and closing plate 13 connected to the stress rod 16 to move laterally, the opening and closing plate 13 opens the communication between the heat dissipation port 12 of the protective box 10 and the outside after moving, and heat exchange is carried out between the outside air and the accommodating bin 11 to cool the transformer body 100;

in the cooling process, the opening and closing plate 13 is positioned on the outer side surface of the heat dissipation opening 12, and when the weather of wind, sand and rain is faced, the opening and closing plate 13 blocks dust, sand and grains or rain from entering the heat dissipation opening 12 from the side surface under the blowing of wind;

when the temperature sensor 20 detects that the working temperature generated by the transformer body 100 is lower than the temperature threshold set by the temperature sensor 20, the air pump 30 is controlled to be started by the temperature sensor 20, so that the air pump 30 extracts the air in the air pressure cavity 14 through the air inlet pipeline 31, the air pressure cavity 14 generates negative pressure, the piston 15 is pulled to slide and reset along the air pressure cavity 14, the piston 15 is further pulled to slide and reset the stress rod 16 and the opening and closing plate 13, the opening and closing plate 13 is enabled to close the heat dissipation opening 12 and the outside again, and finally the protection box 10 is closed, so that the transformer body 100 is protected.

In the above steps, after the heat dissipation port 12 is communicated with the outside, in the heat exchange process between the heat dissipation port 12 and the accommodating bin 11, the filter layer 40 of the heat dissipation port 12 filters the outside air, when the filter layer 40 is fully attached with dust particles, so that the air permeability of the filter layer 40 is reduced, the accommodating bin 11 and the outside air are unbalanced, pressure is generated on the filter layer 40, the filter layer 40 is deformed after being stressed by the elastic transverse wires 41 and the longitudinal wires 42 in the filter layer 40, after the deformation, the curved transverse wires 41 and the longitudinal wires 42 are straightened, and in the straightening process, the mutual positions between the transverse wires 41 and the longitudinal wires 42 are changed, so that dust particles in the filter layer 40 are squeezed, the dust particles fall down, the air permeability of the filter layer 40 is restored, and the loss of the cooling performance of the transformer body 100 is effectively reduced.

While the foregoing describes the illustrative embodiments of the present utility model so that those skilled in the art may understand the present utility model, the present utility model is not limited to the specific embodiments, and all inventive innovations utilizing the inventive concepts are herein within the scope of the present utility model as defined and defined by the appended claims, as long as the various changes are within the spirit and scope of the present utility model.

Claims (10)

1. An open-close temperature regulating mechanism, comprising:

a protective housing having therein:

the accommodating bin is used for accommodating and installing the transformer body;

the heat dissipation port is communicated with the accommodating bin and the outside;

the inner surface of the opening and closing plate is attached to the outer side of the heat dissipation opening so as to seal the communication between the heat dissipation opening and the outside;

the air pressure cavity is distributed at the periphery of the heat dissipation opening;

the piston is movably connected with the air pressure cavity;

one end of the stress rod is connected with the inner surface of the opening and closing plate, and the other end of the stress rod is connected with the piston;

the temperature sensor is arranged on the accommodating bin and used for detecting the working temperature of the transformer body; the air pump, the air pump passes through wired or wireless communication mode to be connected temperature sensor, the air pump is equipped with:

and the air inlet pipeline is communicated with the air pressure cavity.

2. The open-close temperature adjusting mechanism according to claim 1, wherein a filter layer is arranged in the heat radiation opening and is used for filtering particles in air.

3. The open-close temperature adjusting mechanism according to claim 2, wherein the filter layer comprises a curved cross wire and a curved longitudinal wire, the cross wire and the longitudinal wire have elasticity, the cross wire and the longitudinal wire are staggered together along different directions, and the cross wire and the longitudinal wire are not fixed together by adopting a fixed connection mode.

4. The open-close temperature adjustment mechanism according to claim 1, wherein the outward facing port of the heat radiation port is of an enlarged conical configuration such that dust particles and rain water are less likely to accumulate at the heat radiation port.

5. The open-close temperature adjusting mechanism according to claim 1, wherein at least one rubber gasket is attached to an inner surface of the open-close plate to enhance sealing property against the heat radiation port.

6. The open-close temperature adjusting mechanism according to claim 2, wherein the center of the open-close plate is a solid or the center of the open-close plate is a hollow structure, an exhaust fan is arranged at the hollow structure, and the heat of the transformer body arranged in the accommodating bin is extracted through the exhaust fan to realize temperature reduction.

7. The opening and closing temperature adjusting mechanism according to claim 6, wherein a sliding cavity is arranged in the opening and closing plate, a conductive sheet is arranged in the sliding cavity and is electrically connected with the exhaust fan, the sliding cavity is dynamically connected with a limiting plate, the stress rod penetrates into the sliding cavity and is connected with the limiting plate, an electricity obtaining sheet is arranged on the limiting plate and is connected with a power supply, a gap is reserved between the electricity obtaining sheet and the conductive sheet, and the electricity obtaining sheet is contacted with the conductive sheet through pushing of the stress rod, so that the exhaust fan is electrically started.

8. A transformer having an open-close temperature regulating mechanism as claimed in any one of claims 1 to 7.

9. The transformer of claim 8, wherein the transformer body is mounted in the containment bin with cooling fins provided thereon.

10. The transformer of claim 8, wherein the transformer body is further connected with a conservator, the conservator is connected with a breather pipe, and a breather pipe is installed below the breather pipe.

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