JPH066490Y2 - Hygroscopic respirator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hygroscopic respirator attached to a transformer or the like.

[0002]

2. Description of the Related Art In a power transformer or the like, an electric insulating oil is sealed inside for the purpose of insulation and cooling. This encapsulated electrical insulating oil expands and contracts with changes in the load of the transformer and changes in the outside air temperature, and volume changes are repeated, so
The air in the remaining space above the insulating oil follows this, expands and contracts, and enters and leaves the outside air to breathe.

Since there is always some humidity in the atmosphere, although there is a difference depending on the season and the weather, the upper residual space is not directly communicated with the outside air, and dehumidification is performed through a hygroscopic respirator containing a hygroscopic agent. I was trying to breathe.

In the hygroscopic respirator, when the electrically insulating oil is in equilibrium and is not breathing, in other words, when the hygroscopic agent continuously contacts the atmosphere during apnea, the hygroscopic performance is deteriorated.
As shown in FIG. 7 (A), the electric insulating oil O is stored in the oil jar C, and the small pipe for intake P1 and the small pipe for exhaust P2 are reversely immersed therein, and the first operation and function are performed with a few centimeters of respiratory pressure water column. The wet type oil seal valve which was made to do so was used. Here, the condition of S> P1 diameter> P2 diameter is satisfied. Then, when the internal pressure of the device becomes low, the small pipe for intake P1 is exposed as shown in FIG. 7 (B), and outside air or bubbles are sucked in, but the small pipe for exhaust P2 remains sealed with oil.
On the contrary, when the internal pressure becomes high, as shown in FIG. 7C, the small air pipe P2 becomes bubbles and the air therein is discharged, while the small air pipe P1 is sealed with oil.

[0005]

In recent years, as the size of power transformers has increased, the amount of electrically insulating oil enclosed in the transformers has also increased, and the amount of breathing tends to increase accordingly. Therefore, a large amount of hygroscopic agent is used to complement and improve the hygroscopic performance.

However, with breathing, the electrically insulating oil in the oil jar, that is, the separating liquid, jumps up due to the passing breathing atmosphere, and if the intake and exhaust exceeds the limit, it leaks to the outside or the hygroscopic agent leaks. Not only did it suck and stain, but depending on the amount, the tip of the small pipe buried in the oil jar was exposed and the function as an oil seal valve was lost. Therefore, as maintenance, it was necessary to check and replenish the insulating oil in addition to replacing the hygroscopic agent, which was troublesome.

As the hygroscopic agent stored inside the respiratory organ,
Silica gel particles that have been dehumidified and reusable by heating have been used. However, when reusing dehumidification, if the heating rate is too fast, the particles break into fine particles and pass through the mesh inside the respiratory organ. As mentioned above, the shortage of personnel meant that the merit of reuse was weakened. On the contrary, not only was it troublesome to replace the used hygroscopic agent, but it was also troublesome to clean up the dust accumulated inside the atomized particles. On the other hand, even if the silica gel particles as a hygroscopic agent were discarded as they were, there was no possibility of causing pollution problems because they were originally the main components of the earth.

[0008]

The present invention has been made to solve the above-mentioned problems of the prior art, and makes it unnecessary to replenish the separating liquid into the oil jar by means of a dry valve, and to use a hygroscopic agent. It is also possible to easily replace the above.The main point is to install an absorption / exhaust isolation plate inside and divide the intake flow path and the exhaust flow path to store the hygroscopic agent in a container in the intake flow path. Connected to the main body container, which is configured to connect piping from equipment such as electric power transformer and oil tank, so as to seal with a hinge, and connect to the atmosphere only when breathing following each flow path. However, it is characterized in that a dry type valve is provided which opens only the suction flow passage at the time of suction and releases only the exhaust flow passage at the time of exhaust.

[0009]

Embodiments The contents of the present invention will be described below with reference to the embodiments shown in the drawings. The hygroscopic respirator according to the present invention comprises a main body 1 having a substantially cylindrical shape and an upper lid 2.

The main body 1 has an exhaust port 11a and an intake port 11
A bottom plate 11 provided with b is provided, and a separating plate 12 is provided along the inner wall of the container 1 and connected to the exhaust port 11a to divide the intake and exhaust flow paths. Further, a locking edge 12a is provided along the inner circumference of the main body 1 following the separating plate 12. The locking edge 12a may be provided so as to project from the inner wall of the main body 1, and may be provided separately from the separator 12.

The moisture absorbent 4 contained in the container 3 is hooked and stored in the locking edge 12a. The container 3 is made of a resin molded product or a moisture-proof paper container. A flange 3a is provided around the upper end, a gasket 3b is attached to the lower surface of the flange 3a, and a large number of holes are formed on the upper and lower surfaces. The ventilation holes 3c are formed, and a sealing seal 3d that closes the ventilation holes 3c is attached during storage and is removed when used. Further, a window hole 3e is provided on the side surface, and a transparent sticker 3f is attached here.

As the hygroscopic agent 4, silica gel particles having a diameter of several millimeters are used, and a coloring treatment is performed in advance in order to show that all or part of the hygroscopic agent is absorbed. Specifically, when it is colored light blue and absorbs moisture, the colors are sequentially changed to green, pink, and white.

A viewing window 13 is provided on the body of the main body 1. The viewing window 13 has an opening 13a formed in the main body 1, a transparent plate 13c is brought into contact with the body 13 through a gasket 13b, and is tightened with a round cap nut 13d.
It corresponds to the transparent seal 3f so that the color of the hygroscopic agent 4 in the container 3 can be confirmed through the viewing window 13.

Hinge receivers 14 and 21 are provided on the upper portion of the side surface of the main body 1 and the upper lid 2, respectively, and the two are connected by a pin 5 so that they can be freely opened and closed. The hole 14a has an oval shape so that the upper lid 2 can be moved slightly up and down.

As a detachable fastening means 6 for sealing the main body 1 and the upper lid 2, a single screw bolt 6c is rotatably connected to a mounting portion 6a protruding from the main body 1 by a pin 6b, and a wing nut 6d is screwed in. The wing nut receiver 6e is provided on the upper lid 2, and the wing nut 6d is manually tightened.

For sealing, a gasket groove 22 is provided in the upper lid 2 corresponding to the upper peripheral edge of the main body 1, a gasket 23 is put therein, and the single screw bolt 6c is manually tightened so that the sealing can be achieved.

A flange seat 24 for fixing a connecting flange 71 of the pipe 7 from a device such as a transformer is provided in the center of the upper lid 2, and the connecting flange 71 is fixed with a tightening bolt 8.
Then, the flange seat 24 is tightened via the gasket 24a to attach the main body 1.

On the back surface of the upper lid 2, a flange portion 3a of the container 3 is provided.
Is provided with an annular projecting edge 25, and the projecting edge 25 is provided with a cutout portion 25a continuing to the exhaust passage.

An exhaust valve chamber 15 for shutting off the hygroscopic agent 5 from the atmosphere following the exhaust port 11a and the intake port 11b of the bottom plate 11 of the main body 1 and allowing the breathing operation at a slight pressure of several millimeters of water column, The intake valve chambers 16 are independently provided.

The intake valve chamber 16 has a gasket 1 at its opening.
An intake port / valve seat 18 is provided through 7a, and an intake valve 30 is attached to the valve seat 18 by a screwing method. Further, the intake valve chamber 16 is provided with a removable plug 19 for checking and draining the inside of the intake valve chamber 16. In the illustrated example, the plug 19 is made of a screw.

In the illustrated example, the intake valve 30 is screwed through the intake port / valve seat 18, but the valve seat and the intake valve are integrally formed and screwed directly into the intake valve chamber 16. It can also be configured.

An exhaust valve 40 is attached to the opening of the exhaust valve chamber 15 by screwing, and a plug 19 is provided.

At the lower part of the main body 1, a protective cover 9 having an opening 91 below is attached by a mounting screw 92 to protect the valve chambers 15 and 16 and to prevent rainwater from drip. .

Since the intake valve 30 and the exhaust valve 40 have the same structure but only the mounting directions are reversed, the description will be given with reference to simplified FIGS. 4 and 5. Fluoro resin or rubber,
Alternatively, a connecting member 3 includes a main body 31 that is formed of a thin film valve integrally molded of silicon rubber and that abuts a valve seat that is an opening of the valve chambers 15 and 16, and a ring 32 that is wound around the outer edge of the valve seat.
In the normal state, it is pressed lightly against the valve seat so that the hygroscopic agent 4 does not come into contact with the atmosphere at the time of apnea and is consumed, and the expansion and contraction of the electric insulating oil inside the transformer. Following the above, the upper and lower pressures of the residual air above the water column 1
It works when it reaches 2 centimeters. FIG. 4 shows a closed state and FIG. 5 shows a released state.
When placed in the same orientation as shown in FIG. 1, when one is closed, the other will be released. Therefore, when inhaling, the absorbed atmosphere is always supplied to the inside through the hygroscopic agent 4, but when exhausting, since the intake valve 30 is closed and the hygroscopic agent itself has resistance, The air from the inside is discharged almost without contacting the hygroscopic agent 4, and the hygroscopic agent 4 is not exposed to unnecessary moisture.

FIG. 6 shows another valve 50 embodiment.
The main body 51 abutting on the valve seat and the mounting rod 52 are made to penetrate from the center of the main body 51, and the mounting rod 52 is inserted into the seats 15a, 16a provided inside the valve seat to be stopped. In addition, the cover plate 60 is provided with an opening (not shown) as appropriate. The cover plate 60 protects the valve 50 so as not to impair its function, which allows the valve 50 to be further formed into a thin film. The basic structure of these valves 30, 40, 50 is widely used in kerosene pumps and dust masks.
It can be said that the operational reliability and long life have been proven.

[0026]

As described above, in the hygroscopic respirator according to the present invention, the intake flow path and the exhaust flow path are divided within the main body, and when the inside of the transformer is in equilibrium, that is, during apnea, it is closed. At times, a dry type valve that only one of the valves opens is used, so it is possible to avoid the occurrence of the loss of valve function that occurs during abnormal breathing that occurs with conventional wet type valves, maintenance is unnecessary, and when inhaling Only the hygroscopic agent inside will pass through. Therefore, since the consumption of the hygroscopic agent inside is suppressed to a low level, it will last for a long time, and the inconvenience of frequent replacement of the hygroscopic agent does not occur.

Furthermore, since a viewing window is provided on the main body and the consumption condition of the hygroscopic agent inside can be visually confirmed by color, it is possible to easily know the time of replacement, and moreover, the hygroscopic agent contained in the container can be removed by removing the upper lid. The main body can be swung to remove the hygroscopic agent in a used container, and a new one can be put in, which makes the work extremely easy.

The hygroscopic agent is designed to be disposable, but when the container has heat resistance,
It is also possible to collect a predetermined amount of a container containing a hygroscopic agent, which has lost the hygroscopic property, and dry the container together with the container to recover the hygroscopic injectability and reuse the container.

In addition, since the dry type valve is adopted, it is possible to mount the respirator in the horizontal direction without being restricted by the mounting direction.

Although the embodiment has been described as a hygroscopic breather of a transformer, it can be used not only as a hygroscopic breather for a large tank of insulating oil.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hygroscopic respirator according to the present invention.

FIG. 2 is a partially cutaway plan view taken along the line AA of FIG.

3 is a bottom view taken along the line BB of FIG.

FIG. 4 is a front view, a sectional view, and a rear view showing a closed state of a valve.

FIG. 5 is a cross-sectional view showing an opened state of the valve.

FIG. 6 is a sectional view showing a valve of another embodiment.

FIG. 7 is a view showing a conventional wet type valve, in which A is for balanced apnea, B is for inhalation, and C is for exhalation.

[Explanation of symbols]

 1 Main body 2 Upper lid 3 Container 4 Hygroscopic agent 6 Fastening means 7 Piping 8 Tightening bolt

Claims (1)

[Scope of utility model registration request] 1. A main body which is provided with an intake / exhaust isolation plate inside and which is divided into an intake flow path and an exhaust flow path to store a hygroscopic agent in a container in the intake flow path, from a device such as a power transformer or an oil tank. The upper lid configured to connect the pipes is connected by a hinge so as to be sealed, and each passage is connected to the atmosphere only when breathing, only the intake passage is released when inhaling, and the exhaust passage when exhausting. A hygroscopic respirator characterized by being provided with a dry-type valve that releases only the valve.