JP2001189218A - Cooling device for transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for a transformer, which can be attached and detached by one action to and from an arbitrary part of a radiator, uniformly wets the surfaces of fins by jetting cooling water at an arbitrary angle, and reduces the amount of cooling water by intermittent jetting. SOLUTION: This cooling device for a transformer jets water to the radiator 2, where a plurality of radiating fins 4 are attached in the longitudinal direction at intervals inside a frame 3 and cools the radiator 2. The cooling device consists of a single-action clamp lever 14 which is to be fixed to the radiating fins 4 or the frame 3, a connecting pipe 9 which is attached to the single-action clamp lever 14 and has a plastic hose 11 connected to the lower end, a jet nozzle 16 which is attached on the upper side of the connecting pipe 9 via a flexible metal pipe 15, an solenoid valve 17 connected with a water supply pipe 13 of the plastic hose 11, and a switch timmer 21 intermittently operating the solenoid valve 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a transformer, which cools a transformer by injecting water into a radiator.

[0002]

2. Description of the Related Art In general, the temperature of insulating oil in a transformer rises during operation, so that the insulating oil is passed through a radiator to be cooled by air. However, when the temperature is high, such as during the daytime in summer, if a large load is applied, the temperature of the insulating oil may exceed a prescribed temperature. For this reason, when the insulating oil cannot be sufficiently cooled only by air cooling, water is sprayed on the surface of the radiator to cool it.

As a conventional water cooling device, for example, as shown in FIG. 7, a radiator 2 is provided beside a transformer main body 1, and the radiator 2 is disposed inside a rectangular frame 3 in a vertical direction. A plurality of radiating fins 4 are attached at intervals. A water sprinkling pipe 5 is attached to the upper part of the frame 3, and cooling water 6 flows down from the water sprinkling pipe 5 to wet the surfaces of the radiating fins 4 to perform cooling.

[0004] In this cooling structure, for example, the water sprinkling pipe 5 is attached only during summer when the temperature rises, and removed when the temperature falls. The water pipe 5 is a frame 3 of the radiator 2.
Since it was mounted on a work surface, it was required to work at a high place, and there was a problem that it was dangerous and the workability was poor. Also, in the conventional device, the sprinkler pipe 5 always
Since the cooling water 6 is allowed to flow down, there is a problem that the amount of the cooling water 6 used increases, and in a place where a sufficient amount of the cooling water 6 or the water pressure cannot be secured, it is insufficient to cool the plurality of radiators 2 at the same time. There was something. Further, in the conventional downflow type sprinkler pipe 5, the flow path of the water is constant, and the surface of the radiating fins 4 cannot be uniformly wetted, thus causing rust.

[0005]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned problems, and can be attached to and detached from a radiator at an arbitrary position with a single touch, and sprays cooling water at an arbitrary angle to uniformly wet the surface of the fin. Another object of the present invention is to provide a transformer cooling device in which the amount of cooling water used by intermittent injection is reduced.

[0006]

According to a first aspect of the present invention, there is provided a transformer cooling device which sprays water to a radiator in which a plurality of radiating fins are vertically mounted inside a frame at intervals. In a cooling device of a transformer for cooling, a one-touch clamp lever fixed to a radiating fin or a frame, a connection pipe attached to the one-touch clamp lever, and a hose connected to a lower end, and a flexible metal on an upper side of the connection pipe. It is characterized by comprising an injection nozzle attached via a pipe, an electromagnetic valve connected to a water supply pipe of the hose, and a timer for intermittently operating the electromagnetic valve.

According to a second aspect of the present invention, there is provided a cooling device for a transformer, wherein a water supply pipe is branched into a plurality of parts, electromagnetic valves are respectively attached thereto, and each electromagnetic valve is sequentially switched to intermittently connect a different system of injection nozzles. And a switching timer for operating the switch is provided.

According to a third aspect of the present invention, there is provided a cooling device for a transformer, wherein a program timer for setting an operation date and an operation time zone is connected to the switching timer. The cooling device for a transformer according to claim 4 is characterized in that a timer is connected to a temperature sensor for measuring the temperature of the transformer or the outside air temperature, and the solenoid valve is activated when the temperature exceeds a set temperature. Is what you do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described in detail with reference to FIG. FIG. 1 shows a piping diagram of a cooling device, in which a plastic hose 11 connected to a water tap 10 is connected to an operation box 12, and a connection formed from this operation box 12 by a metal tube through the plastic hose 11. Connected to tube 9. This connection pipe 9
3, is fixed to a one-touch clamp lever 14, which can be clamped and fixed at an arbitrary position of the radiation fin 4 of the radiator 2.

On the upper side of the connection pipe 9, a flexible metal pipe 1 is provided.
5 is connected and the injection nozzle 16 is attached to the tip, so that the direction of the injection nozzle 16 can be arbitrarily set by bending the flexible metal tube 15.

As shown in FIG. 1, an electromagnetic valve 17, a Y strainer 18, and a pressure gauge 23 are connected to a water supply pipe 13 laid inside the operation box 12, and the electromagnetic valve 17 is connected to a control device 19. Have been. As shown in FIG. 2, the control device 19 is connected between a power line RT and a program timer 20 for setting an operation date and an operation time zone, and this contact 20a is connected in series to a switching timer 21 for setting an operation time. ing. The contact 21a of the switching timer 21 is connected in series with the auxiliary relay 22, and the contact 22a of the auxiliary relay 22 is connected in series with the electromagnetic valve 17.

As shown in FIG. 1, the transformer cooling device having the above-described structure connects a plastic hose 11 connected to a water tap 10 to a water supply pipe 13 of an operation box 12. An operation date and an operation time zone are set in the program timer 20 of the operation box 12 so that the operation is performed from 9:00 am to 4:00 pm from Monday to Friday, for example. Switching timer 21
For example, the operation time is set so as to be turned on / off every minute. Next, as shown in FIG. 3, the one-touch clamp lever 14 is attached to an arbitrary position of the radiating fin 4 of the radiator 2 and fixed. Thereafter, the flexible metal tube 15 is bent to adjust the distance from the radiation fins 4 and the direction of the injection nozzle 16.

After setting in this way, the water tap 10
And the program timer 20 is turned on. For example, at 9:00 am on Monday, the program timer 20 operates and the contact 20a shown in FIG. 2 is turned on. Contact 20a
Is turned on, the switching timer 21 is activated and its contact 21
“a” switches every minute and repeats on / off.

When the contact 21a turns on every minute,
The auxiliary relay 22 connected to this operates every minute,
The electromagnetic valve 17 connected to the contact 22a operates intermittently to open the water supply pipe 13. As a result, the operation box 12
Then, water is supplied to the flexible metal tube 15 through the plastic hose 11 and the connection pipe 9, and the cooling water 6 is sprayed from the spray nozzle 16 at the tip toward the radiation fin 4.

Therefore, the cooling device of the present invention is attached to the radiating fin 4 at an arbitrary position with the one-touch clamp lever 14, and the distal end is formed of the flexible metal tube 15. The cooling water 6 can be injected over a wide range. The injected cooling water 6 wets the surface of the radiating fin 4 and can cool the radiating fin 4 by heat of vaporization when the fin 4 evaporates.

The cooling water 6 sprayed onto the radiating fins 4 intermittently sprays when the surface of the radiating fins 4 dries and wets the surface, so that the cooling water 6 can flow directly below the radiator 2. In addition, the amount of the cooling water 6 to be used is greatly reduced, and the heat of vaporization can be effectively used. In addition, since the water is directly sprayed onto the surface of the radiation fins 4.
It is possible to prevent the generation of rust by uniformly wetting the surface, as compared with the method of flowing down from the surface.

FIG. 4 shows another embodiment of the present invention, in which a connecting pipe 9 is fixed to a one-touch clamp lever 14 via a fitting 25, and the tip of the connecting pipe 9 branches into a T-shape. The cooling water 6 can be sprayed from the spray nozzles 16 over a wider range.

FIGS. 5 and 6 show another embodiment of the present invention, in which a water supply pipe 13 provided inside an operation box 12 is branched into two branches, and each of the branched water supply pipes 13 is provided with an electromagnetic valve. 17A and 17B are attached. Water supply pipe 1 equipped with each electromagnetic valve 17A, 17B
3 is connected to the connection pipe 9 fixed to the one-touch clamp lever 14 via the plastic hose 11,
Further, the connection pipes 9 are respectively connected to flexible metal pipes 15 to which injection nozzles 16 are attached.

As shown in FIG. 6, the control device 19 is connected to a program timer 20 for setting an operation day and an operation time zone between the power supply lines RT, and this contact 20a is connected to a switching timer 21 for setting the operation time. They are connected in series. Further, the contact 21a of the switching timer 21 is connected to the auxiliary relay 2
2A and 22B, the contact 22a of the auxiliary relay 22A is connected in series with the electromagnetic valve 17A, and the contact 22b of the other auxiliary relay 22B is connected in series with the electromagnetic valve 17B.

Reference numeral 26 denotes a temperature sensor such as a thermocouple attached to the radiator 2.
When the heat radiation fin 4 becomes high in temperature, this is detected and the contact 27a is turned on to activate the switching timer 21.

As shown in FIG.
An operation date and an operation time zone are set by the program timer 20 of the operation box 12. The operation time is set in the switching timer 21 so as to be turned on / off every minute, for example.
When the program timer 20 is activated and the contact 20a is turned on, the switching timer 21 connected thereto is activated and the contact 21a is switched every minute.

When the contact 21a is switched every minute, the auxiliary relays 22A and 22B connected thereto are turned on alternately, the contacts 22a and 22b are switched, and the electromagnetic valves 17A and 17B are operated alternately. As a result, the injection nozzles 16 and 1 through the water supply pipe 13 branched into two branches.
The cooling water 6 is alternately sprayed onto the radiating fins 4 from 6.

Therefore, when the injection nozzles 16 are set toward two locations on the front and rear sides of the radiator 2, the amount of water is smaller than when the injection is performed from two locations at the same time. 6 and effective cooling in places where water pressure cannot be secured. Further, since the temperature sensor 26 is attached to the radiator 2, when the radiating fin 4 exceeds a predetermined temperature and becomes high temperature outside the operation time, the alarm setting device 27 is activated, and this contact 27a is turned on. The switching timer 21 operates to inject the cooling water 6. The temperature sensor 26 may be configured to detect the outside air temperature without being attached to the radiator 2.

In the above description, the water supply pipe 13 in the operation box 12 is branched into two branches, and the electromagnetic valves 17A, 17
Although the case where B is attached is shown, a structure branched into three or more branches may be used. In the above description, the case where the one-touch clamp lever 14 is attached to the radiating fin 4 is shown, but it may be attached to the frame 3 of the radiator 2.

[0025]

As described above, claim 1 according to the present invention.
According to the transformer cooling device described above, a one-touch clamp lever, a connection pipe attached to the one-touch clamp lever, a hose connected to a lower end, and a flexible metal pipe mounted on an upper side of the connection pipe. It is composed of an injection nozzle, an electromagnetic valve connected to the water supply pipe of the hose, and a timer for intermittently operating the electromagnetic valve, so that it can be attached and detached at any place of the radiator with one touch, and The cooling water can be sprayed at an arbitrary angle to uniformly wet the surface of the fin, and the amount of cooling water to be used by spraying intermittently can be reduced.

According to the cooling device for a transformer of the present invention, the water supply pipe is branched into a plurality of parts, electromagnetic valves are respectively attached thereto, and the electromagnetic valves are sequentially switched to intermittently connect the injection nozzle of another system. Since the switching timer is provided to operate at a time, the amount of water used is smaller than in the case of simultaneous injection from a plurality of locations, and cooling can be effectively performed even in a place where a sufficient amount of cooling water or water pressure cannot be secured.

According to the third aspect of the present invention, the switching timer is connected to a program timer for setting an operation day and an operation time zone, so that the operation can be performed according to the temperature and the load condition. . Further, according to the cooling device for a transformer according to claim 4, by connecting a temperature sensor for measuring the temperature of the transformer or the outside air temperature to the timer, and operating the electromagnetic valve when the temperature exceeds the set temperature. In addition, when the fin becomes hot outside the operation time, the safety can be improved by injecting the cooling water.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a transformer cooling device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing the control device of FIG. 1;

FIG. 3 is a perspective view showing a state where the cooling device is attached to a fin of a radiator.

FIG. 4 is a perspective view showing a state in which a cooling device according to another embodiment of the present invention is attached to fins of a radiator.

FIG. 5 is an explanatory diagram showing a schematic configuration of a cooling device in which a water supply pipe according to another embodiment of the present invention is branched into two branches.

FIG. 6 is a circuit diagram showing the control device of FIG. 5;

FIG. 7 is a perspective view showing a conventional cooling device for a transformer to which a sprinkler tube 5 is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transformer main body 2 Heat radiator 3 Frame 4 Fin 5 Sprinkler pipe 6 Cooling water 9 Connecting pipe 10 Water tap 11 Plastic hose 12 Operation box 13 Water supply pipe 14 One-touch clamp lever 15 Flexible metal pipe 16 Injection nozzle 17 Electromagnetic valve 19 Control device 20 Program timer 21 Switching timer 22 Auxiliary relay 26 Temperature sensor 27 Alarm setting device

Claims (4)

[Claims] 1. A one-touch clamp lever fixed to a heat-dissipating fin or a frame in a cooling device of a transformer for injecting water to a heat-dissipator in which a plurality of heat-dissipating fins are vertically installed inside a frame and cooled. And a connection pipe attached to the one-touch clamp lever and connected to a hose at the lower end, an injection nozzle attached to the upper side of the connection pipe via a flexible metal pipe, and a water supply pipe of the hose. A cooling device for a transformer, comprising: an electromagnetic valve; and a timer for intermittently operating the electromagnetic valve. 2. A water supply pipe is divided into a plurality of branches, electromagnetic valves are respectively attached to the branches, and a switching timer for intermittently operating an injection nozzle of another system by sequentially switching each electromagnetic valve is provided. The cooling device for a transformer according to claim 1. 3. The cooling device for a transformer according to claim 1, wherein a program timer for setting an operation date and an operation time zone is connected to the switching timer. 4. The timer according to claim 1, wherein a temperature sensor for measuring a temperature of the transformer or an outside air temperature is connected to the timer, and when the temperature exceeds a set temperature, the electromagnetic valve is operated. A cooling device for the transformer as described.