JPH10196877A - Gas vent plug for piping in liquid tank - Google Patents

Abstract

(57) [Summary] An air bleeding device having a simple structure to bleed air from a liquid supply pipe in a liquid tank. An oil is used as an example of a liquid, and an oil 31 in a tank 11 is pumped by a pump 14 through a check valve 15 and an oil feed pipe 12 to F
In the configuration in which the oil is fed in the
The plug 1 provided with 2a and formed with a not-shown throttle is fitted into the screw hole of the seat 12a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid tank, and more particularly to a structure of a gas vent plug attached to an oil feed pipe provided in an oil tank.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a conventional configuration. Oil 31 is stored in a tank 11 and pump 3
1 is sent in the F direction via the check valve 15 and the oil feed pipe 12 and returned to the tank 11 from the R direction via the return pipe 19. The upper portion of the pipe 12 where air is stored is connected to the return pipe 19 via the air release pipe 21, the valve 23 and the throttle 25. According to this configuration, when the air in the oil feed pipe 12 is evacuated, the valve 23 is opened to return the air from the throttle 25 to the space in the tank via the pipe 19, and the oil discharged at the same time is discharged from the oil in the tank 11. It was back to 31. That is, the valve 23 was opened and used during the oil feeding, and the valve 23 was closed when the pressure resistance test of the oil feeding pipe system was performed.

[0003]

As described above, the conventional air bleeding device is composed of the air bleeding pipe, the valve, and the throttle, and has a complicated structure. An object of the present invention is to provide an air bleeding device having a simple configuration.

[0004]

According to the present invention, a seat having an opening communicating with the inside and outside of a pipe is provided in a gas reservoir of a liquid feed pipe placed in a liquid storage in a liquid tank. Is closed by a plug having a through-hole having a large fluid resistance, and the opening of the seat is closed by a plug having no through-hole during the pressure test of the liquid feed pipe.

According to a second aspect of the present invention, in the plug for gas release according to the first aspect, the through hole has a T-shape, and has a structure in which one hole is provided inside the pipe and two holes are provided outside the pipe. According to a third aspect of the present invention, in the plug according to the first or second aspect, the through hole communicating with the outside of the pipe is provided with a cover for preventing liquid scattering. According to a fourth aspect of the present invention, in the plug according to the first aspect, the through hole provided on the outside of the pipe is opened downward.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, two kinds of plugs are connected to a seat provided in an air reservoir of a liquid feed pipe in a liquid tank and penetrating the pipe, and formed into a plug at the time of liquid feed. Gas escapes easily from the air reservoir of the liquid feed pipe through a large fluid resistance hole through which gas easily escapes and oil does not easily escape. This is a configuration that replaces the plug with no hole. Hereinafter, the liquid will be described as oil.

Embodiment 1 FIG. 1 shows an example of the present invention. The oil 31 in the tank 11 is supplied to the check valve 1 by the pump 14.
5 and the oil feed pipe 12 to feed in the F direction, and return pipe 1
9 to return the oil 31 of the tank 11 to the oil supply pipe 12, the oil supply pipe 12 has a seat 12a having an opening communicating with the inside and outside of the pipe.
As shown in FIG. 2 in detail, a plug 1 having a throttle formed of a through hole 1h having a large fluid resistance is fitted to the seat 12a at the time of oil feeding, and the opening of the seat 12a is closed. According to this configuration, the air in the air reservoir passes through the plug 1 and is released to the atmosphere in the tank 11, and the oil that has escaped returns to the other oil 31. At the time of the pressure resistance test, the air is simply replaced with another plug having no through hole. Therefore, it is possible to provide an air vent plug having a simplified configuration and a clean appearance.

Embodiment 2 FIG. 3 shows another embodiment of the plug 1. A plug 1t having a T-shaped hole 1m having a large fluid resistance is attached to an oil feed pipe 12 by an upward seat 12a.
And the opening of the seat 12a is closed. Embodiment 3 FIG. 4 shows another embodiment of the plug 1. A plug 1 in which a T-shaped hole 1m having a large fluid resistance is formed, and a bulk 1z is provided to cover a discharge portion of the T-shaped hole.
k is fitted into the screw hole of the upward seat 12 a provided in the oil feed pipe 12.

Embodiment 4 FIG. 5 shows another embodiment of the plug 1. A plug 1p having a large fluid resistance and having a deformed hole 1n partially closed by a plug 9 and opened downward.
Into the screw hole of the upward seat 12 a provided in the oil feed pipe 12.

[0010]

According to the present invention, the air vent pipe,
A valve and a pipe connection type throttle are not required, so that the work inside and outside the tank can be omitted, the appearance is improved, and the possibility of damaging the air vent pipe due to vibration or impact is eliminated. Further, the withstand voltage test can be easily performed simply by replacing the plug for the test.

According to the second aspect of the present invention, the liquid that escapes with the air does not scatter to the lid of the tank, so that the liquid can be used effectively. According to the third aspect of the present invention, the discharged liquid flies only to the bulk of the plug, so that the discharged liquid can be used effectively even when the amount of liquid in the tank is small. According to the fourth aspect of the present invention, all the liquid can be effectively used because the liquid that has escaped is blown downward where liquid is always present.

According to the fifth aspect of the present invention, the liquid is limited to oil and can be used for an oil tank.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

2A is a plan view and FIG. 2B is a cross-sectional view of the example of the plug of FIG.

3A is a plan view of another example of the plug of FIG. 1, and FIG.
(b) is a sectional view

FIG. 4 (a) is a plan view of another example of the plug of FIG. 1;
(b) is a sectional view

5A is a plan view of another example of the plug of FIG. 1; FIG.
(b) is a sectional view

FIG. 6 is a configuration diagram of a conventional embodiment.

[Explanation of symbols]

 Reference Signs List 1 plug 1a plug 1h through hole 1k plug 1z cap 9 stopper 11 tank 12 oil feed pipe 14 pump 19 return pipe 21 air release pipe 23 valve 25 throttle 31 oil

Claims (5)

[Claims] A seat having an opening communicating with the inside and outside of a pipe is provided in a gas reservoir of a lower liquid feed pipe placed in a liquid storage in a liquid tank. A gas vent plug for piping in a liquid tank, wherein the plug is closed by a plug having a large through hole, and the opening of the seat is closed by a plug without a through hole during a pressure test of the liquid feed pipe. 2. The plug according to claim 1, wherein the through hole of the plug is a T-shape, and the through hole of the plug communicates with one hole inside the pipe and two holes outside the pipe. Vent plug for piping inside the liquid tank. 3. The plug according to claim 1 or 2, wherein the plug for venting the gas in the liquid tank has a structure in which a through hole communicating with the outside of the plug is provided with a cover for preventing liquid scattering. Vent plug for piping inside the liquid tank. 4. The plug according to claim 1, wherein the through hole communicating with the outside of the pipe of the plug is provided for removing gas from the pipe in the liquid tank.
A gas vent plug for piping in a liquid tank characterized by a structure that opens downward. 5. The gas vent plug according to claim 1, wherein the liquid is oil.