JPS6143020Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flame trap connected and arranged in a combustible gas feed line.

Traditionally, flame traps have been installed in flammable gas supply lines to prevent flashbacks, but usually flame arresters (flame arresters) are installed in combination with these flame traps. It is mandatory to install such a flame trap in combination with a flame arrester in the methane gas, etc. line of large-scale human waste processing equipment.

However, in the past, flame traps and flame arresters were special devices, and the configuration was such that they were connected in the line, making installation not only cumbersome but also expensive.
Furthermore, inspection of the internal elements of both devices had to be carried out specially, which was very inconvenient.

On the other hand, conventional flame arrester elements are constructed by laminating mesh bodies and housed within a flame arrester body, resulting in a complicated structure and increased costs.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
By incorporating the flashback prevention valve and the flame prevention element into the valve box that is to be connected to the flammable gas supply line, the configuration is simplified and its installation, maintenance and inspection can be easily performed. In particular, it is an object of the present invention to provide a flame trap in which the structure of a flame arrester element can be simplified and costs can be significantly reduced.

The structure of the present invention includes a valve box connected to a flammable gas supply line and equipped with an internal inspection window closed with a sealing lid on one side; a check valve biased in a direction to close the flow path of the check valve; a temperature fuse inserted between the check valve and the inner bottom surface of the valve box to maintain the open state of the check valve; It consists of a flame arrester element installed in the gas flow path inside the box, and the flame arrester element is composed of a long corrugated metal plate set on a flat plate and wound into a screen shape. This is what I did.

An embodiment of the flame trap according to the present invention will be explained based on the drawings, in which FIG. 1 is a sectional view and FIG. 2 is a front view of a flame arrester element.

In the figure, 1 is a valve box that is to be connected to the flammable gas supply line via connecting flanges 2, 2 at both ends, and has an internal inspection window 3 formed in the upper part and is sealed with a sealing lid 4. has been done. Inside the valve chamber 5, there is a check valve 6 which is always biased by a spring 7 in a direction to close the gas flow path 8, and a temperature fuse 9 for keeping the check valve 6 open.
and a flame arrester element 10 installed in the gas flow path 8.

The above-mentioned check valve 6 is disposed on the downstream side in the valve chamber 5, and has a disk shape, and its valve shaft portion 11 is held by an arm 12 that rotates about a hinge portion 13 as a fulcrum. The disk seat 6a that has been moved is brought into contact with the valve seat seat 14. The temperature fuse 9 has a tubular shape, and when the check valve 6 is opened, the temperature fuse 9
The check valve 6 is set so as to be placed between the fuse locking portion 15 attached to the valve chamber 5 and the locking portion 5a formed on the inner bottom surface of the valve chamber 5 to maintain the open state of the check valve 6. The fuse locking portion 15
is provided with a protrusion 15a, which is adapted to enter and be locked into the open end of the temperature fuse 9. Therefore, in the event that a fire occurs on the secondary side (downstream side of the gas flow path), the temperature fuse 9 will melt due to the temperature caused by the backfire phenomenon.
The check valve 6 is closed as shown by the phantom line.

The flame arrester element 10 is disposed on the upstream side within the valve chamber 5 and is held by a holding portion 16 projecting from the inner wall of the valve box 1. As shown in FIG. 2, this flame arrester element 10 is constructed by setting a long metal corrugated plate 17 on a flat plate 18, locking one end to a winding core 19 that will serve as a mounting core material, and then placing it in a cage. The flat plate 18 is wound into a shape, the outer edge of the flat plate 18 is slightly extended, and this is fixed by welding 20 to the outer surface. As a result, a large number of fine holes are formed between the flat plates 18, 18,
Although there is no problem with gas flow, the intrusion of flames caused by backfires is prevented. . A spanning rod 21 is brought into contact with the other end of the flame arrester element 10, and is connected to the winding core 1.
It is designed to be tightened and fixed to the above-mentioned 16 via a tightening rod 22 inserted into 29.

By configuring the flame arrester element 10 as described above, it is structurally simple and can accurately prevent the intrusion of flames.
It is ideal as a flame arrester element to be placed inside the valve box of a flame trap, and is a simpler device than the conventional structure of stacking nets and storing them inside the flame arrester body. It is possible to significantly reduce costs.

According to the frame trap according to the present invention, a temperature fuse is provided in the valve box between the tip side of the check valve and the inner bottom surface of the valve box in order to maintain the state between the check valve and the check valve. Since the flame arrester element is arranged, when the temperature fuse is melted by the flame, the check valve is closed by the biasing force of the spring, and the gas flow path is closed. It is possible to accurately prevent intrusion into the

In particular, in the present invention, the flame arrester element placed inside the valve box of the flame trap is constructed by setting a long corrugated metal plate on a flat plate and winding it into a screen shape. Therefore, its structure is simple and costs can be significantly reduced, making it ideal for this type of frame trap.

[Brief explanation of the drawing]

The drawings show an embodiment of the flame trap according to the invention, with FIG. 1 being a sectional view and FIG. 2 being a front view of the flame arrester element. 1: Valve box, 3: Internal inspection window, 4: Sealing lid, 5:
Valve chamber, 6: Check valve, 7: Spring, 8: Gas flow path, 9: Temperature fuse, 17: Corrugated plate, 18:
Flat plate, 10: Flame arrester element.

Claims (1)

[Scope of utility model registration request] A valve box connected to a flammable gas supply line and equipped with an internal inspection window closed with a sealing lid on one side; and a valve box that is placed inside the valve box and uses a spring to constantly close the gas flow path. A check valve that is biased in the direction, a temperature fuse that is passed between the check valve and the inner bottom surface of the valve box to maintain the open state of the check valve, and a gas flow inside the valve box. The flame arrester element is composed of a long corrugated metal plate set on a flat plate and wound into a cage shape. Frame trap.