JPH04136398U - cylinder filling tube - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate loosening of the main stopcock due to contact between the spanner 7 and the main stopcock when opening and closing the stopper 5. [Structure] A recess 8 into which a spanner can be inserted is formed in a part of the outer surface of a cap nut 4 for tightening a plug 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a cylinder filling tube for filling a pressure vessel with gas.

0002

[Conventional technology]

FIG. 4 is a perspective view of a conventional cylinder filling tube. Conventionally, this type of gas charging The filling tube is, for example, a tube section 3 extending laterally from the top of the cylinder 1, as shown in FIG. A cap nut 4 is fitted into the screw of the pipe section 3, and the frontage of the pipe section 3 is closed by the cap nut 4. It was equipped with a plug 5 to close it off. When filling the cylinder with gas from this cylinder filling pipe, First, loosen the cap nut 4 with the spanner 7, remove the plug 5, and connect the gas supply device to the pipe section 3. The pipes were connected and filled.

0003

[Problem that the idea aims to solve]

In the conventional cylinder filling tube described above, the outer surface of the cap nut 4 is uniformly hexagonal. The wrench 7 can be applied to any part. Therefore, the bag nut of the cylinder When attaching or removing nut 4, tighten cap nut 4 with spanner 7 or When tightening, the spanner 7 slides laterally and contacts the main valve 2, causing the main valve 2 to open. There was a problem with this.

0004 The purpose of this invention is to bring a spanner into contact with the main cock 2 in order to solve this problem. To provide a cylinder filling pipe whose stopper can be opened and closed without any hassle.

[0005]

[Means to solve the problem]

The cylinder filling tube of this invention extends beyond the pressure vessel and has a thread formed at the tip. A pipe part that is screwed into this pipe part, and a part of the outer surface is larger than the other side part. The cap nut is recessed and a portion of the outer surface thereof has a hexagonal cross section.

[0006]

【Example】 Next, the present invention will be explained with reference to the drawings.

[0007] Figure 1 is a cross-sectional view of a cylinder filling tube showing an embodiment of the present invention, and Figure 2 is a cross-sectional view of the bag nut shown in Figure 1. FIG. The filling tube of this cylinder is as shown in Figures 1 and 2. A recess 8 is formed in a part of the outer surface of the cap nut 4a, and the recess 8 is formed into a hexagonal shape. This is what happened. Other than that, it is the same as the conventional example.

[0008] By providing the recess 8 in the cap nut 4a in this way, the spanner 7 can be inserted into the recess. 8, the spanner 7 can close the cap nut 4a without slipping in the axial direction. 5 can be opened and closed.

[0009] FIG. 3 is a perspective view of a nut portion of a cylinder filling tube showing another embodiment of the present invention. As shown in FIG. Instead, rings 6a and 6b are welded to both sides of the cap nut 4b. child This prevents the wrench from slipping sideways, so it does not touch the main stopper 2 when opening and closing the stopper. Do not loosen the main valve 2.

0010

[Effect of the idea]

As explained above, the present invention has a concave part on the outer surface of the cap nut that is fitted with a wrench. This prevents the wrench from sliding sideways when loosening the cap nut. This is a cylinder filling method that allows you to open and tighten the stopper without touching the main stopper with a wrench. This has the effect of providing a filled tube.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a cylinder filling tube showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the cap nut portion of FIG. 1;

FIG. 3 is a perspective view of a cap nut portion of a cylinder filling tube showing another embodiment of the present invention.

FIG. 4 is a perspective view of a cylinder filling tube showing a conventional example.

[Explanation of symbols]

1 cylinder 2 Main valve 3 Pipe section 4, 4a, 4b Cap nut 5 Stopper 6a, 6b ring 7 Spanner

Claims (1)

[Scope of utility model registration request] Claim 1: A tube portion that extends from a pressure vessel and has a thread formed at its tip; and a tube portion that is screwed into the tube portion and has a portion of its outer surface recessed than another side portion, and a portion of the outer surface of the tube portion; and a cap nut having a hexagonal cross-section.