阅读说明：本技术 一种变压器的喷淋降温系统 (Spraying cooling system of transformer ) 是由 李应光 黎进光 李春 刘海涛 于 2020-04-28 设计创作，主要内容包括：本发明公开了一种变压器的喷淋降温系统,包括变压器壳体,以及排列安装在变压器壳体上的多个散热片,相邻散热片之间的格栅内均安装有高压喷淋头,变压器壳体上安装有用于拦截上升水汽的强力条形气刀,强力条形气刀喷射的气流在散热片上方形成气流屏障,防止高压喷淋头喷出的水雾在上升气流和风力的作用下附着在变压器顶部的电力配件上,从而减少或避免水雾对电力配件和变压器造成的负面影响,有利于变压器和电力配件稳定地运行,以及延长变压器和电力配件的使用寿命。(The invention discloses a spraying cooling system of a transformer, which comprises a transformer shell and a plurality of radiating fins arranged on the transformer shell, wherein high-pressure spray headers are arranged in grids between adjacent radiating fins, a powerful strip-shaped air knife for intercepting rising water vapor is arranged on the transformer shell, airflow sprayed by the powerful strip-shaped air knife forms an airflow barrier above the radiating fins, and water mist sprayed by the high-pressure spray headers is prevented from attaching to power accessories at the top of the transformer under the action of the rising airflow and the wind power, so that the negative influence of the water mist on the power accessories and the transformer is reduced or avoided, the stable operation of the transformer and the power accessories is facilitated, and the service life of the transformer and the power accessories is prolonged.)

1. The utility model provides a spraying cooling system of transformer, includes transformer housing (1) and arranges and install a plurality of fin (2) on transformer housing (1), its characterized in that, adjacent all install high-pressure shower head (14) in the grid between fin (2), install powerful bar air knife (3) that are used for intercepting rising steam on transformer housing (1).

2. The transformer spray cooling system according to claim 1, wherein the powerful bar air knife (3) comprises a main air supply pipe (301), and a bending air knife (302) connected to and communicating with the main air supply pipe (301), an outlet of the bending air knife (302) faces a spraying direction of the high pressure spray header (14), and the high pressure spray header (14) is located between the transformer housing (1) and the bending air knife (302).

3. The spray cooling system of a transformer according to claim 2, wherein the powerful bar-shaped air knife (3) further comprises a secondary air supply pipe (303) and a high-pressure air nozzle (304) connected with the secondary air supply pipe (303), wherein the high-pressure spray heads (14) positioned in the same grid are installed on both sides of the high-pressure air nozzle (304), and the secondary air supply pipe (303) is provided with an intermittent switch for controlling each high-pressure air nozzle (304) to intermittently spray water mist to form water mist cyclone.

4. The transformer spray cooling system according to claim 3, wherein a water pan (4) is mounted on the transformer housing (1), the water pan (4) is arranged opposite to the high-pressure spray header (14), the bending air knife (302) and the gap air nozzle (304), and the water pan (4) is connected with a condensation recovery pipe (5).

5. The transformer spray cooling system according to claim 4, wherein a condensation tank (6) is connected to the condensation recovery pipe (5), an exhaust port of the condensation tank (6) is connected to the main air supply pipe (301) and the auxiliary air supply pipe (303) through an air pump (7), a cooling water tank (8) is connected to a water outlet of the condensation tank (6), and a plurality of high-pressure spray headers (14) are connected to the cooling water tank (8) through a water supply pipe (9).

6. The spray cooling system of the transformer according to claim 5, characterized in that a refrigerating device (10) for taking electricity and refrigerating in a power-consuming valley period is installed in the refrigerating water tank (8).

7. The spray cooling system for the transformer according to claim 5, wherein a cooling water jacket (11) communicated with the inside of the cooling water tank (8) is installed on the wall of the cooling water tank, and the condensing tank (6) is installed in the cooling water jacket (11).

8. The spray cooling system of a transformer according to claim 5, wherein the intermittent switch comprises a cycle timer (12) and a solenoid valve (13) electrically connected to the cycle timer (12), and the secondary air supply pipe (303) is connected to the air pump (7) through the solenoid valve (13).

Technical Field

The embodiment of the invention relates to the technical field of power transformers, in particular to a spraying cooling system of a transformer.

Background

Oily self-cooling transformer is high or under the great condition of load at ambient temperature, and the heat of production can not distribute through the fin fast, leads to the oil temperature higher, causes the output capacity of transformer not enough, and in order to reduce the transformer oil temperature, a lot of present transformers all adopt spray set to assist the cooling to the transformer.

The spraying equipment generally comprises a high-pressure spraying head connected with a water supply system, a water pump and a temperature monitoring system for transformer oil, wherein the temperature monitoring system is used for monitoring the temperature of transformer oil and controlling the water pump according to the temperature of the transformer oil, when the temperature monitoring system monitors that the transformer is over-temperature, the water pump is controlled to pump water to pump high-pressure spraying water into the high-pressure spraying head, the spraying water is sprayed out in a foggy shape from the high-pressure spraying head under the action of water pressure, heat on a transformer shell and cooling fins is absorbed through the sprayed water fog, the cooling speed of the transformer shell and the cooling fins is accelerated, and therefore the purpose of cooling.

However, when the spraying system sprays cooling water, water mist can be formed, under the action of surface updraft and wind force, the water mist can ascend and be attached to power accessories such as wiring terminals, wires and high/low voltage sleeves at the top of the power transformer, and if the power accessories are covered in the water mist for a long time, the service life of the power accessories can be influenced, even the power accessories are short-circuited, and the normal operation of the transformer is threatened.

Disclosure of Invention

Therefore, the embodiment of the invention provides a spraying cooling system of a transformer, which intercepts rising water mist through air flow sprayed by a powerful strip-shaped air knife so as to solve the problems that the water mist generated by spraying is attached to power accessories at the top of the transformer, so that the transformer and the power accessories are broken down and the service life is shortened in the prior art.

In order to achieve the above object, the embodiment of the present invention discloses the following technical solutions:

the utility model provides a spraying cooling system of transformer, includes the transformer casing, and arranges and install a plurality of fin on the transformer casing, it is adjacent all install the high pressure shower head in the grid between the fin, install the powerful bar air knife that is used for intercepting rising steam on the transformer casing.

As a preferred aspect of the present invention, the powerful strip air knife includes a main air supply pipe and a bending air knife connected to and communicated with the main air supply pipe, an outlet of the bending air knife faces a spraying direction of the high pressure shower head, and the high pressure shower head is located between the transformer housing and the bending air knife.

As a preferable scheme of the present invention, the powerful strip-shaped air knife further includes an auxiliary air supply pipe and a high-pressure air nozzle connected to the auxiliary air supply pipe, wherein both sides of the high-pressure air nozzle are respectively provided with a high-pressure shower head located in the same grid, and the auxiliary air supply pipe is provided with an intermittent switch for controlling each high-pressure air nozzle to intermittently spray water mist and form water mist cyclone.

As a preferred scheme of the invention, a water pan is mounted on the transformer shell, the water pan is arranged opposite to the high-pressure spray header, the bending air knife and the gap air tap, and the water pan is connected with a condensation recovery pipe.

As a preferable embodiment of the present invention, the condensation recovery pipe is connected to a condensation tank, an exhaust port of the condensation tank is connected to the main air supply pipe and the sub air supply pipe by an air pump, a water discharge port of the condensation tank is connected to a refrigeration water tank, and the plurality of high pressure showers are connected to the refrigeration water tank by a water supply pipe.

As a preferable scheme of the invention, the refrigeration equipment for taking electricity and refrigerating in the electricity utilization valley period is arranged in the refrigeration water tank.

In a preferred embodiment of the present invention, a cooling water jacket is installed on a wall of the refrigeration water tank, the cooling water jacket communicating with an inside of the refrigeration water tank, and the condensation tank is installed in the cooling water jacket.

As a preferable mode of the present invention, the intermittent switch includes a cycle timer, and an electromagnetic valve electrically connected to the cycle timer, and the auxiliary air supply pipe is connected to the air pump through the electromagnetic valve.

As a preferable scheme of the present invention, the main air supply pipe, the auxiliary air supply pipe and the water supply pipe are all installed on the transformer housing through a heat insulation sheath, a pipeline matching with the main air supply pipe, the auxiliary air supply pipe and the water supply pipe is arranged in the heat insulation sheath, and a heat insulation layer is arranged between an outer wall of the heat insulation sheath and a pipe wall of the pipeline.

The embodiment of the invention has the following advantages:

airflow sprayed by the powerful strip-shaped air knife forms an airflow barrier above the radiating fins, so that water mist sprayed by the high-pressure spray head is prevented from being attached to power accessories such as wiring terminals, wires, high-voltage sleeves and low-voltage sleeves at the top of the transformer under the action of ascending airflow and wind power, and negative effects of the water mist on the power accessories and the transformer are reduced or avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and 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, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;

FIG. 2 is a schematic overall structure diagram of a second embodiment of the present invention;

fig. 3 is a schematic view of a high pressure showerhead structure according to a second embodiment of the invention.

In the figure:

1-a transformer housing; 2-a heat sink; 3-a powerful strip-shaped air knife; 4-a water pan; 5-a condensation recovery pipe; 6-a condensation tank; 7-an air pump; 8-a refrigeration water tank; 9-a water supply pipe; 10-a refrigeration device; 11-a cooling water jacket; 12-a cycle timer; 13-a solenoid valve; 14-high pressure shower head;

301-continuous gas supply duct; 302-bending the air knife; 302-intermittent gas supply duct; 304-high pressure air nozzle.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1, the invention discloses a spraying cooling system of a transformer, which comprises a transformer housing 1 and a plurality of radiating fins 2 arranged on the transformer housing 1, wherein high-pressure spray headers 14 with downward spraying directions are arranged in grids between adjacent radiating fins 2, and a powerful strip-shaped air knife 3 for intercepting rising water vapor is arranged on the transformer housing 1.

In the first embodiment of the invention, the powerful strip-shaped air knife 3 is positioned above the high-pressure spray header 14, and the air flow sprayed by the powerful strip-shaped air knife 3 forms an air flow barrier above the heat radiating fin 2, so that water mist sprayed by the high-pressure spray header 14 is prevented from being attached to power accessories such as a binding post, a lead, a high-voltage sleeve, a low-voltage sleeve and the like at the top of the transformer under the action of ascending air flow and wind force, and negative effects of the water mist on the power accessories and the transformer are reduced or avoided.

As shown in fig. 2 and 3, in the second embodiment of the present invention, the powerful bar air knife 3 includes a main air supply pipe 301, and a bending air knife 302 connected to and communicating with the main air supply pipe 301, an outlet of the bending air knife 302 faces a spraying direction of the high pressure shower head 14, and the high pressure shower head 14 is located between the transformer housing 1 and the bending air knife 302.

The top of the bent air knife 302 and the top of the radiating fin 2 are provided with a gap for discharging hot air flow rising from the radiating fin 2, the bent air knife 302 downwards sprays high-speed air flow, so that a vertical air curtain spaced from the radiating fin 2 is formed, the vertically arranged air curtain greatly reduces the interference of wind power on the high-pressure spray header 14, water mist sprayed by the high-pressure spray header 14 moves to the bottom of the radiating fin 2 along a grating, the vertical water curtain increases the stay time of the water mist diffused by the grating at the radiating fin 2, the water mist can fully absorb heat on the radiating fin 2, and the spraying and cooling effects are improved.

In addition, the powerful strip-shaped air knife 3 further comprises an auxiliary air supply pipe 303 and high-pressure air nozzles 304 connected with the auxiliary air supply pipe 303, the two sides of each high-pressure air nozzle 304 are respectively provided with a high-pressure spray header 14 positioned in the same grid, and the auxiliary air supply pipe 303 is provided with an intermittent switch used for controlling each high-pressure air nozzle 304 to intermittently spray water mist and form water mist cyclone.

The export of high pressure air nozzle 304 and high pressure spray header 14 all is the flat shape that parallels with fin 2, the design of intermittent type nozzle and both sides high pressure spray header 14, be favorable to high pressure spray header 14 spun water smoke to contact with the fin 2 of corresponding one side, when avoiding single high pressure spray header 14 blowout and the equal wide water smoke of grid, the water smoke that is located grid width direction middle part can't contact with fin 2 and lead to the waste of water resource, be favorable to reducing the thickness of the water smoke that high pressure spray header 14 erupted, when guaranteeing the cooling effect to fin 2 promptly, reduce high pressure spray header 14's water jet, thereby the water resource has been practiced thrift.

And, the high-pressure air nozzle 304 is intermittently opened and closed through the gap switch, when the high-pressure air nozzle 304 is temporarily closed, a short negative pressure area is formed behind the air flow between the water mists on the two sides, the water mists on the two sides of the negative pressure area are deviated to the negative pressure area under the action of the suction force of the negative pressure area, and under the action of automatic kinetic energy, inertia and the negative pressure suction force, water mist cyclone moving slowly downwards is generated in the negative pressure area, the generation of the water mist cyclone increases the contact time between the water mist and the radiator shell positioned between the radiating fins 2 on the two sides, which is beneficial for the water mist to fully absorb the heat on the radiator shell, thereby increasing the radiating speed of the radiator shell, namely improving the spraying and cooling effects.

In order to avoid waste of water resources, the transformer shell 1 is provided with a water receiving disc 4, the high-pressure spray head 14, the bent air knife 302 and the gap air nozzle 304 are arranged oppositely to directly recover the sprayed water mist, the water receiving disc 4 is connected with a condensation recovery pipe 5, the condensation recovery pipe 5 is connected with a condensation tank 6, and an exhaust port of the condensation tank 6 is connected with the main air supply pipe 301 and the auxiliary air supply pipe 303 through an air pump 7.

The recovered water mist is pumped into the low-temperature condensation tank 6 along with the air flow by the air pump 7, so that the water mist in the air flow is condensed into water drops in the condensation tank 6, and the dehumidified and cooled air flow enters the main air supply pipe 301 and the auxiliary air supply pipe 303 again, and the cooling effect of the air flow on the transformer is favorably improved.

Furthermore, a water outlet of the condensation tank 6 is connected with a refrigeration water tank 8, the high-pressure spray headers 14 are connected with the refrigeration water tank 8 through a water supply pipe 9, the refrigeration water tank 8 supplies water for the high-pressure spray headers 14 through the water supply pipe 9, and condensed water drops in the condensation tank 6 flow into the refrigeration water tank 8 again under the action of gravity or a water pump 15, so that the water resource is recycled.

And install in the refrigeration water tank 8 and get refrigerated refrigeration plant 10 at the power consumption valley period, refrigeration plant 10 cools down the shower water in refrigeration water tank 8 at the power consumption valley period, because heat-conduction power is directly proportional with the difference in temperature, promptly along with the increase of the difference in temperature of shower water with fin 2 and transformer, the water smoke that spouts on fin 2 and transformer housing 1 can absorb the heat on fin 2 and transformer housing 1 more fast to further promote the effect of spraying the cooling.

Further, a cooling water jacket 11 communicated with the inside of the cooling water tank 8 is installed on the wall of the cooling water tank 8, the condensing tank 6 is installed in the cooling water jacket 11, the cooling water tank 8 continuously supplies cooling water to the cooling water jacket 11, so that the cooling water jacket 11 keeps a low temperature, and when the temperature of the cooling water tank 6 is higher than that of the cooling water jacket 11 due to the fact that the cooling water tank 6 absorbs heat in recovered water mist, the cooling water jacket 11 absorbs heat on the condensing tank 6 through the cooling water in the cooling water tank to maintain the condensing function of the condensing tank 6.

Wherein, the intermittent switch includes cycle timer 12, and solenoid valve 13 with cycle timer 12 electric connection, vice air supply pipe 303 is connected with air pump 7 through solenoid valve 13, cycle timer 12, air pump 7 and the water pump 15 of being connected with delivery pipe 9 all are connected with temperature control system, when temperature control system monitors the transformer overtemperature, control cycle timer 12, air pump 7 and water pump 15 start, cycle timer 12 is through setting for, just send the signal that control solenoid valve 13 opened to solenoid valve 13 at every interval a period of time, realize air pump 7 to the clearance air supply of vice air supply pipe 303 through solenoid valve 13 of intermittent type switching, thereby realize that a plurality of high pressure air jets 304 jet stream intermittently.

In addition, main air supply pipe 301, vice air supply pipe 303 and delivery pipe 9 pass through heat preservation sheath 14 and install on transformer housing 1, set up in the heat preservation sheath 14 with main air supply pipe 301, vice air supply pipe 303 and delivery pipe 9 matched with pipeline, heat preservation sheath 14 has made things convenient for main air supply pipe 301, the installation of vice air supply pipe 303 and delivery pipe 9 is fixed, and be provided with heat preservation 15 between heat preservation sheath 14 outer wall and the pipeline pipe wall, with the heat in the reduction environment to the conduction of the spray water and the air current in the transportation process, reduce the negative effects to the cooling effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.