JPH10157794A - Air venting structure of fuel oil tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel oil tank inexpensively and certainly sending fuel oil by providing an air vent structure not using a cap covering the outer periphery of a strainer and unnecessary for welding the same and not generating such a state that air venting function is not achieved by the freezing of the strainer in the air vent of the fuel oil tank arranged outdoors such as a fuel oil stove used in a home in a cold district. SOLUTION: An engaging part 10b having a diameter smaller than the inner diameter of an air venting pipe 10a is provided to the downward opening part 11 of an air vent 10 and a strainer 12 has a cup-shaped opened large diameter part 12a and a closed small diameter part 12b. The diameter of the large diameter part 12a of the strainer 12 is made larger than the inner diameter of the air venting pipe 10a to prevent the large diameter part 12a of the strainer 12 from falling out of the engaging part 10b of the air venting pipe 10a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel oil tank used in households in cold regions, such as a fuel oil stove or a boiler, and more particularly to an air vent structure for a fuel oil tank installed outdoors.

[0002]

2. Description of the Related Art Such air venting of a fuel oil tank is performed by releasing air inside the tank when fuel oil is supplied from a fuel oil supply port of the fuel oil tank, or by releasing fuel oil from a fuel oil supply port of the fuel oil tank. This is to allow outside air to enter inside the tank when oil is supplied.However, when venting the fuel oil tank installed outdoors, open the vent to the outside air to prevent rainwater from entering the inside of the tank. It is facing down. In addition, a wire mesh strainer is provided in the downward opening of the air vent according to the provisions of the Fire Service Law to prevent sparks from entering the tank.

As shown in FIGS. 6 and 7, a conventional air vent strainer of this kind has a size substantially equal to the outer diameter of the pipe of the air vent 110 at the end face of the downward opening 111 of the air vent 110. A round strainer 111 of wire mesh is provided, and a cap 112 is provided to cover the outer periphery of the strainer 111 and to cover the outer periphery of the pipe of the air vent 110,
It is known that the outer circumferences of the pipes of the cap 112 and the air vent 110 are stopped by welding.

[0004]

The above-described strainer for bleeding air is provided with a downward opening 11 of the bleeding air 110.
Water droplets adhering to the outer periphery of the air vent 110 hang down and collect near the strainer 111, and in cold climates, the water droplets freeze and close off, and the fuel oil does not function as an air vent. It was not done.

[0005] Further, it is demanded that a fuel oil tank for home use be provided as inexpensively as possible as long as it fulfills its function. Providing a cap 112 for covering the outer periphery of the strainer 111 and welding it is a factor which increases the cost. Had become.

Accordingly, the present invention provides an inexpensive and reliable air bleeding structure that does not use a cap 112 that covers the outer periphery of the strainer 111 and does not need to weld it, and that the strainer does not freeze and perform the function of bleeding air. It is an object to provide a fuel oil tank to be fed.

[0007]

The air release structure of the fuel oil tank according to the present invention comprises an air release pipe provided in an upper portion of a tank 1 for storing fuel oil. Engagement part smaller than the inner diameter of 10a
10b, and a strainer 12 inserted into the air release pipe 10a.The strainer 12 is formed into a large-diameter portion 12a having a bowl-shaped opening and a small-diameter portion 12b closed, and the large-diameter portion 12a of the strainer 12 is vented. The inner diameter of the pipe 10a is larger than the inner diameter of the pipe 10a, and is inserted into the air bleeding pipe 10a from the small diameter portion 12b of the strainer 12 so that the large diameter portion 12a of the strainer 12 is prevented from falling off by the engaging portion 10b of the air bleeding pipe 10a. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an engagement portion 10b having a diameter smaller than the inner diameter of an air release pipe 10a is provided in a downward opening 11 of an air release 10, and a large diameter portion 12a of a strainer 12 is connected to the inner diameter of the air release pipe 10a. Since the large diameter portion 12a of the strainer 12 is prevented from falling off by the engaging portion 10b of the air release pipe 10a, the strainer 12 is inserted from the downward opening 11 only by inserting the strainer 12 into the air release pipe 10a. Will not fall.

A strainer 12 is provided to be inserted into the air release pipe 10a. The strainer 12 is formed into a large-diameter portion 12a having an open bowl shape and a small-diameter portion 12b having a closed shape, and the strainer 12 is inserted into the air release pipe 10a. Most of the surface of the strainer 12 is above the downward opening 11 because it is inserted from the small diameter portion 12a.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

The fuel oil tank shown in FIG. 1 is installed outdoors at home for storing about 500 liters of kerosene, and comprises a substantially cubic tank 1 for storing fuel oil and four tanks provided at both ends thereof. A leg 2, an oil supply port 3 with a sealable cap provided on the upper part thereof, an oil supply port 4 provided with a valve and a strainer provided on the lower part thereof, and a gauge provided on the upper part for measuring the amount of fuel oil 5 and an air vent 10 provided on the upper portion.

The lower end of the leg 2 is fixed to the ground on which the slab is installed, so that the tank 1 does not fall down due to an earthquake or the like.

The oil supply port 4 is connected to a fuel oil stove or the like by an oil supply pipe, and the fuel oil is supplied by its own weight.

The air vent 10 is used to release the air inside the tank 1 to the outside when the fuel oil is supplied from the oil supply port 3 of the tank 1 or to discharge the fuel oil from the oil supply port 4 of the tank 1 when the fuel oil is supplied from the oil supply port 3 of the tank 1. The inside of the tank 1 is communicated with the outside air by a hollow air vent pipe 10a.

The air vent 10 is formed in an inverted U-shape to prevent rainwater or the like from entering the inside of the tank, and one end thereof is screwed and fixed to a socket 1a provided on the upper surface of the tank 1. The other end is an opening 11 to the outside air of the air vent 10, and the opening 11 faces downward.

An opening portion 11 of the air vent 10 is provided with an engaging portion 10b which is a protrusion inward of the air vent pipe 10a, and the inner diameter of the engaging portion 10b is smaller than the inner diameter of the air vent pipe 10a. The engaging portion 10b is formed integrally when cutting while rotating the air release pipe 10a.

A strainer 12 is provided which is inserted through the opening 11 into the air vent pipe 10a. The strainer 12 is for preventing sparks from entering the inside of the tank 1 through the opening 11, and is provided with a number of small holes so as not to obstruct communication between the inside of the tank 1 and the outside air.

As shown in FIG. 5, the strainer 12 is in the shape of a bowed bowl, and is formed into a large-diameter portion 12a which is open below and a small-diameter portion 12b which is closed above the strainer.
The large-diameter portion 12a is larger than the inner diameter of the air vent pipe 10a, and the small-diameter portion 12b is smaller than the inner diameter of the engaging portion 10b of the opening 11.

The strainer 12 is formed by molding a stainless steel wire net into a bowl shape and has elasticity as a whole, and its large diameter portion 12a is particularly easily deformed.

As shown in FIG. 4, the strainer 12 is inserted into the air vent pipe 10a from the small diameter portion 12b, and is inserted into the large diameter portion 12b.
a until it exceeds the engagement portion 10b. At this time the large diameter part
Although 12a is larger than the engaging portion 10b, it is deformed and pushed by its elasticity.

The pushed strainer 12 is expanded by the elasticity of its large diameter portion 12a and does not fall off by the engagement portion 10b, so that there is no need to weld the cap or cap to stop the strainer 12, and the cost can be reduced. .

Most of the surface of the strainer 12 is located above the downward opening 11, and even if water droplets attached to the outer periphery of the air vent 10 hang down and gather near the opening 11, they do not reach the strainer 12, so that the water droplets freeze. Even air bleeding 10
The oil is reliably fed without blocking the oil.

In the above embodiment, the opening of the air vent 10
Although the example in which the engaging portion 10b is provided on the 11 is shown, the engaging portion 10b may be located near the opening 11 and may be above the opening 11.

Although the wire mesh is formed as a bowl as the strainer 12, a thin steel plate having many small holes or a synthetic resin is used if the provisions of the Fire Services Act are not applied. But it is good.

[0025]

According to the present invention, an engagement portion having a diameter smaller than the inner diameter of the air release pipe is provided at the downward opening of the air release, and the large diameter portion of the strainer is made larger than the inner diameter of the air release pipe. The diameter part is prevented from falling off by the engagement part of the air release pipe, and the strainer does not fall from the downward opening just by inserting the strainer into the air release pipe, so the cap and cap welding to stop the strainer There is no need, and the cost can be reduced.

Further, a strainer inserted into the air vent pipe is provided, and the strainer is formed into a large-diameter part having an open bowl shape and a small diameter part closed. The strainer is inserted into the air vent pipe from the small-diameter part of the strainer. Most of the surface is above the downward opening, so even if water droplets attached to the outer periphery of the air vent hang down and gather near the opening, it does not reach the strainer, so even if the water droplet freezes, it does not block the air vent , Is reliably fed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an air vent structure of a fuel oil tank.

FIG. 2 is a side view thereof.

FIG. 3 is a partially enlarged view showing a main part of FIG. 1;

FIG. 4 is a partially enlarged sectional view of FIG. 3;

FIG. 5 is a sectional view of a strainer.

FIG. 6 is a diagram showing a conventional example of FIG. 3;

7 is a partially enlarged sectional view of FIG. 6;

[Description of sign]

 1 tank 10 air release 10a air release pipe 10b engaging part 11 opening 12 strainer 12a large diameter part 12b small diameter part

[Procedure amendment]

[Submission date] November 28, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

Claims (1)

[Claims] An air vent provided at an upper portion of a tank for storing fuel oil, wherein a downward engaging portion of the air vent is provided with an engaging portion having a diameter smaller than the inner diameter of the air vent pipe, and the strainer is inserted into the air vent pipe. The strainer is formed into a bowl-shaped open large-diameter part and a closed small-diameter part, the large-diameter part of the strainer is made larger than the inner diameter of the air vent pipe, and inserted into the air vent pipe from the small-diameter part of the strainer, The air vent structure of the fuel oil tank prevents the large diameter part of the strainer from dropping off by the engagement part of the air vent pipe.