JP2001254105A - Method of producing quenching element for gas feed stopping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and inexpensive quenching element for a gas feed stopping device by reconsidering the material. SOLUTION: In a quenching element 7 for a gas feed stopping device provided for damping shock waves infiltrated from an outflow port 3 and diffusing or quenching back flame, a copper alloy largely containing copper among metallic materials other than aluminum is mainly used, this copper alloy is melted to form many spherical granules having approximately the same size, the group of the granules is filled into a die, after that, vibration is applied thereto, and then, sintering is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attenuates a shock wave that has entered from an outlet when a combustible gas, a combustible gas, or a mixed gas thereof flows back in a gas facility pipe, or a backfire occurs, thereby diffusing the backfire. Alternatively, the present invention relates to a method for manufacturing a flame-extinguishing element for a gas supply stop device provided to extinguish a flame.

[0002]

2. Description of the Related Art Generally, a flame-extinguishing element for this type of gas supply stopping device is cylindrical, and after a stainless steel atomizing powder and an adhesive are filled in a mold, the axis of the flame-extinguishing element is reduced. It is manufactured by compacting it in a direction and then sintering it in a furnace. Since the shape of the granular material constituting the atomized powder was irregular in shape and size, it was very difficult to sort many granular materials by size. Therefore, when a flame-extinguishing element is manufactured using a large number of particles having a random shape and size as described above, the gaps between the particles have various sizes, and therefore, they are compacted by the press machine. Thus, the gap between the granular materials is made as uniform as possible.

[0003]

However, when the quenching element is pressed in the axial direction of the flame-extinguishing element by the mold, as shown in FIG.
27B receives a larger pressing force than the intermediate portion 27C,
The gap between the granules on both sides 27A and 27B is much smaller than the gap between the granules on the middle part 27C, and the function as a flame-extinguishing element at both ends 27A and 27B is not performed well. In order to obtain a sufficient function of the flame-extinguishing element, the entire flame-extinguishing element 27 must be lengthened in the axial direction, which not only leads to an increase in the size and weight of the flame-extinguishing element, but also increases the cost due to an increase in materials. Was invited. Further, since the irregular shaped granular material is pressed by the mold, the size of the gap between the pressed granular materials is not substantially the same, and the irregular shaped material having a certain width is not obtained. Because of the gaps, the degree of filtration per unit area varies, and not only filtration cannot be performed smoothly, but also the inconsistency in product variation increases. In addition, the atomized powder of stainless steel is not only costly but also has a bad influence on sintering, and there is a disadvantage in the working surface such as insufficient sintering. Requested.

An object of the present invention is to provide a small and inexpensive flame-extinguishing element for a gas supply stopping device by revising a material in view of the above situation.

[0005]

According to the present invention, in order to solve the above-mentioned problems, an inflow port for inflowing outgoing gas and an outflow of gas flowing in from this inflow port to a supply destination side are provided. In the casing with an outlet for
In a quenching element for a gas supply stop device provided for attenuating a shock wave intruding from the outlet and diffusing or extinguishing a reverse flame, a copper alloy mainly containing a large amount of copper among metallic materials excluding aluminum By melting this copper alloy to form a number of spherical granules having almost the same size, filling the group of granules into a mold, applying vibration, and then sintering In this case, a flame extinguishing element for a gas supply stopping device is manufactured. As described above, by using other metal materials except aluminum as the material of the flame-extinguishing element, it does not adversely affect sintering,
Sufficient sintering can be performed. Moreover, relatively inexpensive and lightweight copper is used as a main component. In addition, by using a large number of spherical granules having substantially the same size by melting a copper alloy and filling the mold with a group of these granules, a vibration is applied to use a conventional pressing process. Even if it is not provided, the gap between the granular bodies does not fluctuate greatly, and it is possible to fill the mold with a substantially constant gap. And after filling the granular material into the mold,
The extinction element can be obtained by sintering by heating to such an extent that atoms on the surface of powder such as fine metal particles can be freely bonded (a temperature lower than the melting point of the material).

The flame-extinguishing element is manufactured by using tin and phosphorus as metals other than the copper.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a gas supply stopping device mounted on equipment such as gas welding. This gas supply stop device is a cylindrical inlet for letting in a flammable gas or a supporting gas sent out from a gas cylinder or the like (not shown) and a mixed gas thereof (hereinafter simply referred to as a gas). An inlet-side first case 2 in which an inlet 1 is formed, and an outlet side in which a cylindrical outlet 3 is formed to allow the gas flowing from the inlet 1 to flow out to a supply side such as a blowing pipe (not shown). Various members described later are provided in a casing 5 including the second case 4. The casing 5 is composed of the two members 2 and 4, but may be composed of one member or three or more members, and the number of members constituting the casing 5 is not limited to these.

At the end of the cylindrical body screwed to the inflow port 1 side of the first case 2, there is provided a pipe connection cap nut 6 having a female screw portion 6A formed on the inner surface thereof. On the outer surface of the end of the case 4 on the outlet 3 side, a male thread 4 for connecting a pipe is provided.
A is formed.

In the casing 5, a cylindrical flame-extinguishing element 7 (FIG. 3 (a)) for attenuating the shock wave flowing backward from the outlet 3 while moving from the outer surface to the inner surface to diffuse or extinguish the reverse flame. )) Is provided. The extinguishing element 7
Was formed in a cylindrical shape with both sides open, but in addition to a bottomed cylindrical shape having a bottom portion, it may be of any shape such as a non-cylindrical flat plate. The shape-like thing can increase a filtration area. In addition, in the casing 5, in addition to the flame-extinguishing element 7, a check valve 10 for allowing the gas to flow from the delivery side and a shut-off valve 11 for shutting off the gas flowing backward from the supply destination are provided. I have. The check valve 10 is slidably fitted inside the inflow port 1 and urged to the closing side by a spring 12, and is opened and moved by the pressure of supplied gas as shown in FIG. It is supposed to be. Also, the shut-off valve 11
Is held at a gas supply position (outflow opening position) by engaging a ball 14 provided on the guide body 13 with a circumferential groove 11A formed on the outer peripheral surface of the integrated shaft. When the gas flows back into the casing 5 and fires back, the pressure ring 15 moves toward the inside of the case against the urging force of the spring 16 due to the pressure of the shock wave at that time, so that the balls 14 move outward. As a result, the lock with the shutoff valve 11 is released, and the shutoff valve 11 is closed and moved by the urging force of the spring 17 (see FIG. 2). The shut-off valve 11 in the closed state can be returned to the gas supply position (outflow port open position) by pushing the restoration rod 18 extended into the shut-off valve 11.

The flame-extinguishing element 7 is made of copper and other metals, for example, a plurality of metal materials such as tin and phosphorus. First, a copper alloy is manufactured by setting the weight ratio so that copper among the plurality of types of metals is the largest weight ratio, tin is the second, phosphorus is the third, and so on.
The second and subsequent metal materials may be other than the above metal materials. For example, assuming that the whole is 100%, copper is 80%
As described above, tin may be set to about 10%, phosphorus may be set to about 0.3%, and other metals may be set to values obtained by subtracting the sum of the above three types from 100%, but are limited to these values. Not something. Then, the copper alloy produced as described above is melted and formed into a number of spherical granules having substantially the same size, and a predetermined amount of the spherical granules is filled in a mold. I do. At the time of the filling or after the filling, by vibrating the mold by a vibration imparting means such as a vibrator, the gap between the granular bodies does not largely change, and the granular bodies can be filled as desired. There are advantages. Next, the flame-extinguishing element 7 can be manufactured by heating (sintering) in the filled state.

FIG. 3 (b) shows a number of granular materials S constituting the flame-extinguishing element 7, and the granular materials S of the same size are heated as described above to form gaps between the granular materials S (FIG. 3B). (Filtration degree) M (actually, most of them are 3 μm to 100 μm).
The size of the gap M can be freely changed only by changing the size of the gap M.

The heating temperature is generally set to be lower than the melting point of the material. However, when heating a copper alloy granular material composed of a plurality of types of materials having different melting points, the heating temperature is set lower than the melting point. The heating temperature may be set to an intermediate value between the highest material and the lowest melting point, or may be set to be lower than the melting point of the lowest melting point material, The melting point may be set to be lower than the melting point.

[0013]

According to the first aspect of the present invention, by using a metal material other than aluminum as a material for the flame-out element, sufficient sintering can be performed without adversely affecting sintering. Moreover, the use of relatively inexpensive and lightweight copper as a main component is advantageous in terms of cost and handling. Also, by using a large number of spherical granules having substantially the same size by melting a copper alloy and filling the mold with a group of these granules, by applying vibration, a conventional pressing process is used. Even if it is not necessary, the gap between the granular materials does not fluctuate greatly, and it is possible to fill the mold with a substantially constant gap, so that a good filtering action over the entire area of the flame-out element can be obtained. It is possible to provide a small flame-extinguishing element for a gas supply stop device without causing the flame-extinguishing element to become large in the axial direction unlike the related art.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a gas supply stopping device in a gas supply state.

FIG. 2 is a vertical sectional side view of the gas supply stopping device in a gas supply stopped state.

FIG. 3A is a perspective view of a flame-extinguishing element, and FIG. 3B is a cross-sectional view of a main part of the flame-extinguishing element, showing an arrangement of granular materials.

FIG. 4 is a side view showing a conventional flame-extinguishing element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inlet 2 Inlet side 1st case 3 Outlet 4 Outlet side 2nd case 4A Male screw part 5 Outlet side 2nd case 6 Cap nut 6A Female screw part 7 Flame extinguishing element 8 Female screw part 9 Flame extinguishing element guide 9A Male screw part 9B Through hole 10 Check valve 11 Shut-off valve 11A Peripheral groove 12 Spring 13 Guide body 14 Ball 15 Pressure receiving ring 16,17 Spring 18 Restoring rod 27 Flame extinguishing element 27A, 27B Both side parts 27C Middle part M Gap S Granular material

Claims (2)

[Claims] 1. A casing provided with an inlet for letting in the gas sent out and an outlet for letting out the gas flowing in from the inlet to a supply destination side. In the flame-extinguishing element for the gas supply stop device provided to attenuate the infiltrating shock wave and diffuse or extinguish the counter-flame, a copper alloy mainly containing a large amount of copper among metallic materials except aluminum is used. After melting the copper alloy to form a large number of spherical granules having almost the same size, and filling the granules with a mold,
A method for manufacturing a flame-extinguishing element for a gas supply stopping device, which comprises sintering after applying vibration. 2. The method according to claim 1, wherein tin and phosphorus are used as the metal other than copper.