JP2602195Y2 - Gas container connection device in pressure regulator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas container connecting device for connecting a pressure regulator to a valve of a gas container such as an acetylene gas cylinder.

[0002]

2. Description of the Related Art As a connecting device for connecting a pressure regulator for reducing gas pressure to a valve of a gas container such as an acetylene gas cylinder, a connecting device described in Japanese Utility Model Publication No. 56-50237 is well known. Have been. As shown in a plan view in FIG. 6, the gas container connecting device has a rectangular mounting frame 3 mounted so as to surround the valve V of the gas container,
A connecting pipe 5 that penetrates one side of the mounting frame 3, the leading end of which is inserted into the discharge port of the valve V, and the other end of which is connected to the pressure adjusting device 9; It is constituted by a screwed clamp bolt 7 and a handle 8 for rotating the clamp bolt.

When the clamp bolt 7 is screwed forward into the mounting frame 3, the tip of the clamp bolt 7 presses the valve V toward the connecting pipe 5, and the clamp bolt 7 and the connecting pipe 5 cooperate. While holding the valve V, the pressure regulator 1 is fixed to the valve V, and as shown in the cross-sectional explanatory view of FIG.
Is pressed by the distal end surface 52 of the connecting pipe 5 to seal the gas pressure. In FIG. 6, reference numeral 6 denotes a stopper which keeps a constant length of the connecting pipe 5 protruding into the mounting frame.
Is a high-pressure manometer and a low-pressure manometer mounted on the pressure regulator, and 12 is a hose connection port.

[0004]

Conventionally, as described above, when the connection pipe 5 is connected to the discharge port 13 of the valve V of the gas container, the packing 133 of the discharge port 13 is pressed by the tip of the connection pipe 5 so that the gas is released. In order to seal the high-pressure gas, it is necessary to strongly press the packing 133, and there is a danger that the mounting operation may be completed without giving a sufficient pressing force and gas leakage may occur. Was.

In order to strongly press the packing, a clamp bolt 7 for pressing the valve V toward the connecting pipe 5 is required.
It is necessary to increase the length of the handle 8 for rotating the clamp bolt so that the tightening torque of the handle 8 is increased. For this reason, the handle 8 is usually loosely fitted into the insertion hole 73 of the clamp bolt 7 so that the effective length of the handle can be increased, and stoppers 81 are provided at both ends of the handle. Since the length of the clamp bolt 7 of the handle from the insertion hole is large, when the pressure regulator is attached to the valve of the gas container and the clamp bolt is tightened, as shown in FIG. There is a disadvantage that the clamp bolt 7 is difficult to be smoothly tightened by the handle 8 when hitting the shoulder A.

In addition, the operator sometimes mistakenly thinks that the clamp bolt does not rotate because the handle is in contact with the shoulder of the gas container and the clamp bolt does not rotate. There was also a danger that the subsequent operation would proceed with the tip surface 52 of No. 5 not pressing the packing 133 to cause gas leakage.

The object of the present invention is to eliminate the above-mentioned difficulties and dangers. By improving the sealing property of the connection between the discharge port 13 of the valve and the connecting pipe 5, a smaller pressing force than in the prior art can be obtained. As well as ensuring a sufficient gas seal between the discharge port and the connecting pipe with pressure, the tightening torque of the clamp bolt 7 that gives the pressing force is reduced, and the length of the handle from the clamp bolt insertion hole is shortened. It was done.

[0008]

In order to achieve the above object, in the gas container connecting device for a pressure regulator according to the present invention, a connecting pipe surrounds a gas passage on a distal end surface which presses a packing of a discharge port of a valve. By providing an annular groove as described above, it is possible to secure a sufficient gas seal with a relatively small pressing force, thereby reducing the required tightening torque of the clamp bolt and extending the length of the handle from the insertion hole of the clamp bolt. The length is reduced to a length that does not hit the shoulder of the gas container.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below in detail with reference to the drawings of the embodiments. FIG. 1 is a plan view of a pressure regulator provided with the gas container connecting device of the present invention, and FIG. 2 is a partially cutaway plan view of the gas container connecting device of the present invention. FIG. 3 is a perspective view of a connecting pipe in the gas container connecting device of the present invention, and FIGS. 4 and 5 are cross-sectional views illustrating a gas sealing mechanism of a connecting portion between the connecting pipe and a discharge port of a valve of the gas container. , FIG. 4 shows a state before pressing, and FIG. 5 shows a state of pressing and sealing.

In the figure, reference numeral 1 denotes a pressure regulator, and reference numeral 2 denotes a gas container connecting device in the pressure regulator. Reference numeral 3 denotes a mounting frame of the gas container connection device, which surrounds a valve V of a gas container (not shown) such as an acetylene gas cylinder and has a rectangular shape. One side 31 of the mounting frame is provided with a screw hole 33 penetrating the mounting frame in and out, and the opposite side 32 facing the side 31 is also provided with a screw hole 34 penetrating the mounting frame in and out. And 34 are disposed so as to face each other.

The screw hole 33 has a screw 42 to be screwed therewith.
A sleeve 4 having an outer periphery is screwed, and a rear end flange 4
3 is in contact with the opening end of the screw hole 33. The connecting pipe 5 is rotatably fitted in the center hole 41 of the sleeve 4.
A stopper 6 whose outer diameter is larger than the inner diameter of the sleeve 4 and smaller than the inner diameter of the screw hole 33 is provided slightly behind the distal end portion 51 of the connecting pipe 5 inserted into the discharge port 13 of the valve V of the gas container. ing. When the gas container connecting device 2 is mounted on the valve V, the length of the connecting pipe 5 protruding inside the mounting frame 3 is regulated by the stopper 6 and becomes a fixed length.
The rear end side 54 of the connecting pipe is connected to the pressure adjusting device 9.

Screw hole 3 penetrating opposite side 32 of mounting frame 3
4, a clamp bolt 7 having a screw 71 on its outer periphery is screwed into the mounting frame so as to be able to advance and retreat freely. When the gas container connecting device 2 is mounted on the valve V of the gas container, the tip 72 is connected to the valve V. The clamp bolt 7 is screwed and rotated so as to press the surface on the side opposite to the discharge port side to press the valve V toward the connection pipe 5. Reference numeral 8 denotes a handle for screwing and rotating the clamp bolt 7. In the illustrated case, the handle 8 is inserted through a through hole 113 on the rear end side of the clamp bolt, and is fixed to the clamp bolt 7 by welding or the like at the insertion portion. .

As shown in FIG. 3, the connecting pipe 5 is provided with a groove 53 having a U-shaped cross section surrounding a gas passage 55 in a distal end surface 52 of a distal end portion 51 thereof. Therefore, the distal end surface 52 of the connecting pipe 5 is opposed to the packing 133 provided on the bottom surface 131 of the concave portion of the discharge port 13 of the valve V of the gas container so as to surround the gas passage 132 (FIG. 4). The valve V is pressed toward the connecting pipe 5 by tightening, and the tip 133 of the connecting pipe 5 and the packing 133 of the discharge port 13 are packed.
Are pressed against each other, the packing 133 is connected to the connecting pipe 5.
Elastically deform so as to bite into the groove 53 of the front end surface 52 of FIG. As a result, the gas sealing performance on both pressing surfaces is improved by the labyrinth effect, and a relatively small pressing force is used as compared with the conventional case where the distal end surface of the connecting pipe is simply pressed against the packing 133 (see FIG. 7). Sufficient gas sealing can be performed.

As described above, when the gas container connecting device 2 is mounted on the valve V, a sufficient gas sealing property can be ensured with a relatively small pressing force, so that the danger of gas leakage due to insufficient pressing force is eliminated. You. Further, since a relatively small pressing force is sufficient, the required tightening torque of the clamp bolt is reduced, and the length of the handle 8 from the insertion hole 73 of the clamp bolt is shortened so as not to hit the shoulder of the gas container. However, the required tightening torque of the clamp bolt 7 can be easily obtained.

The cross-sectional shape of the annular groove provided on the distal end surface 51 of the connecting pipe 5 is not limited to the above-described U-shape, but may be various shapes such as a V-shape, a circular shape, a W-shape connecting two grooves, and a rectangle. be able to. Among them, the W-shape is excellent in terms of sealing performance, but the groove processing is troublesome. Although the U-shaped and V-shaped seals are inferior in sealing performance to the W-shaped, they have the advantage of maintaining sufficient sealing performance and being easy to groove.

The shape of the mounting frame 3 does not need to be limited to the rectangular shape shown in the figure, and the screw hole 33 through which the connecting pipe 5 is inserted and the screw hole 34 through which the clamp bolt 7 is inserted are arranged to face each other. Various other shapes can be used as long as the shapes are not limited. As shown in the figure, the handle 8 is preferably fixed to the clamp bolt by welding or the like at the insertion portion of the clamp bolt 7 because the handle 8 is preferably operable to rotate the clamp bolt. However, the handle 8 is not limited to this, and is shown in FIG. As described above, the handle 8 may be loosely fitted to the clamp bolt 7. However, in this case, it is necessary to make the length of the handle shorter than that shown in FIGS. 6 and 8 so that the end of the handle 8 does not hit the shoulder of the gas container. Further, the handle is not limited to the rod handle as shown in the figure, and may be formed into an appropriate shape such as a three-pronged handle, a ring-shaped handle, or may be detachable from the clamp bolt 7.

In FIG. 1, reference numeral 10 denotes a high-pressure manometer for measuring the pressure on the high-pressure side of the pressure adjusting device 9, and 11 denotes a low-pressure manometer for measuring the pressure on the reduced-pressure side of the pressure adjusting device.
The adjustment of the pressure reduction by the pressure adjusting device 9 is performed with reference to the instructions of these pressure gauges. Reference numeral 12 denotes a hose connection port for connecting a hose for sending a decompressed gas such as acetylene gas to a welding machine or a fusing machine.

[0018]

The gas container connecting device in the pressure regulator according to the present invention has the same configuration and operation as described above, and has excellent gas sealing performance at the connecting portion between the connecting pipe and the discharge port of the valve of the gas container. Since sufficient gas sealing can be obtained with a relatively small pressing force, there is no danger of gas leakage due to insufficient pressing force as in the prior art. In addition, since a sufficient gas sealing property can be obtained with a relatively small pressing force, the required tightening torque of the clamp bolt can be reduced as compared with the conventional case. The length from the clamp bolt insertion portion can be reduced to a length that does not hit the shoulder of the gas container. Therefore, the handle can be turned smoothly, and the handle cannot hit the shoulder of the gas container and cannot be turned.
There is no danger of illusion.

[Brief description of the drawings]

FIG. 1 is a plan view of the device of the present invention.

FIG. 2 is a partially cutaway plan view of the gas container connection device according to the present invention.

FIG. 3 is a perspective view of a connecting pipe used in the present invention.

FIG. 4 is an explanatory view of a connecting portion between the connecting pipe and the discharge port of the valve of the gas container in the present invention, showing a state before being pressed.

FIG. 5 is an explanatory diagram of the same connection portion as FIG. 4, showing a state at the time of pressing and sealing.

FIG. 6 is a plan view of a pressure regulator including a conventional gas container connection device.

FIG. 7 is an explanatory diagram of a connection portion between a connection pipe and a discharge port of a valve in a conventional device.

FIG. 8 is an explanatory view of a rotation obstacle of a handle in a conventional device.

[Explanation of symbols]

 Reference Signs List 3 Mounting frame 5 Connecting pipe 53 Groove 55 Gas passage 7 Clamp bolt 8 Handle 13 Discharge port 133 Packing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F17C 13/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A mounting frame surrounding a valve of an acetylene gas container, and a tip penetrating through one side of the mounting frame and having a tip inserted into a discharge port of the valve located in the mounting frame and pressing the packing of the discharge port. A connecting pipe, a clamp bolt screwed to the opposite side of the mounting frame so as to be able to advance and retreat into the frame, and a handle for rotating the crank bolt; the connecting pipe is used for packing the discharge port. An acetylene gas comprising: an annular groove surrounding the gas passage on the tip end surface to be pressed; and a length from the insertion opening of the clamp bolt of the handle that does not hit the shoulder of the gas container. Container connection device in the pressure regulator.