JPH0527745Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a gas pipe installed between a gas pipe and an appliance in, for example, city gas piping, and in particular enables air bleeding and airtightness inspection in the piping. This relates to a kettle equipped with an air bleed mechanism.

(Conventional technology) Conventionally, in city gas piping, after piping work,
It is necessary to bleed air from inside the pipe. It is easy to bleed air from a gas tank that is in the middle of piping by removing the hose, but this method cannot be used to bleed air from a gas pipe that is directly connected to the equipment. In addition, since there are problems with the airtightness inspection of piping, which is carried out once every three years, in areas such as cheese and hyuzukotsuk, it is desired that the inspection be carried out at handketsuko.

Therefore, in order to facilitate air bleeding and airtightness inspection, a pot like the one shown in FIG. 4 has been conventionally used. This pot has a rotatable plug 2 for opening and closing a flow path in a body 1, a handle 4 is attached to the plug 2 with a tightening bolt 3, and a plug seat 5 is installed at an appropriate position on the body 1.
A through hole 6 is formed in the center of the body 1 to communicate the inside and outside of the body 1, and a plug 7 is removably screwed into the through hole 6. Therefore, during air bleeding or airtightness inspection, the plug 7 is removed from the through hole 6 to establish communication between the inside and outside of the body 1.

Another conventional example is JP-A No. 53-53032, which states that a blind plug is screwed into a detection hole provided in a rotary valve body, and by removing the blind plug, detection is performed. A measuring meter, etc. can be connected to the hole.

(Problems to be solved by the invention) The above-mentioned conventional Kotoku is troublesome to manufacture because the plug seat 5 must be formed on the outside of the body 1, and the appearance is not good. Since the plug 7 protrudes, it is easily visible, and since the plug 7 can be rotated with a general tool, there is a risk of gas leakage caused by an outsider opening the plug. In addition, since this type of kettle is generally installed in a narrow space in a house, depending on the installation position of the plug 7, the floor or wall may become an obstacle, making it difficult to insert tools. There are problems such as sometimes not being possible.

In addition, in Japanese Patent Application Laid-Open No. 53-53032, since the blind plug itself is exposed outside the Kotuku body,
It is still impossible to prevent an outsider from accidentally removing the blind plug.

This invention was developed in order to solve the above-mentioned conventional problems.It does not expose the plug to the outside of the body, improves the appearance, and prevents careless opening operations. The purpose is to

(Means for Solving the Problem) In order to achieve the above object, the present invention rotatably provides a stopper for opening and closing the flow path in the body.
In a kettle in which a handle is attached to the stopper, a through hole is formed in the direction of the rotation axis of the stopper to communicate the inside and outside of the body, and the lower end of the through hole is connected to the through hole formed in the stopper, and The upper end of the hole is connected to an inner cylindrical surface having a larger diameter than the through hole, and the upper part of the female threaded part connected to this inner cylindrical surface is opened to the outside of the body, and the male threaded part is attached to the upper part and the O ring is attached to the lower part. Screw the installed seal member into the lower end of the female thread mentioned above, seal the inner cylinder surface with the O ring mentioned above, and secure the handle fitted to the top of the stopper with the tightening bolt screwed into the female thread. The above-mentioned sealing member was then embedded in a position below the female threaded portion of the stopper to construct a pot with an air vent mechanism.

(Function) In the kettle of the present invention, the handle is usually held and the stopper is rotated to perform normal opening and closing operations of the flow path. However, when air bleeding or airtightness inspection,
Remove the tightening bolt and remove the handle from the stopper.
The sealing member with the O-ring is removed from the female threaded portion of the stopper, or is slightly screwed out from the female threaded portion to establish communication between the inside and outside of the body. The sealing member with an O-ring is normally recessed inside the stopper, so it is not noticeable from the outside. Since the kettle is always installed with the handle facing in a direction that is easy to operate, the sealing member is inevitably located in a position that is easy to operate, making air bleeding and air tightness inspections easier.

(Example) An embodiment of the present invention is shown in FIGS. 1 to 3.

FIG. 1 is a sectional view of the pot, FIG. 2 is a sectional view of a part of the pot during an air-bleeding operation, and FIG. 3 is a sectional view showing a state in which an airtight test is performed.

In the figure, a plug 12 having a penetration part 13 for opening and closing a flow path is rotatably fitted tightly into a body 11. The stopper 12 has a penetrating portion 13 therethrough.
A through hole 14 is formed in the direction of the rotation axis to communicate between the inside and the outside. Below this through hole 14 is a through part 1
3, and is connected to an inner cylindrical surface 15a having a larger diameter than the through hole 14 at the upper end of the through hole 14, and this inner cylindrical surface 1
The upper part of the female screw part 15 connected to the body 1
1 so as to be open to the outside.

The sealing member 17 has a male threaded portion 18 at the top and an O-ring 16 at the bottom. This sealing member 17 is screwed into the lower end of the female threaded portion 15, and the O-ring 16 seals the inner cylindrical surface 15a. It is configured to do so. Further, the upper end of the seal member 17 is provided with a slot 19 for receiving a rotating tool.

A handle 20 is fitted into the upper part of the stopper 12, and a tightening bolt 22 with a square hole is passed through a hole 21 in the center of the handle 20 and is screwed into the female threaded portion 15. 22 is embedded inside the stopper 12. The handle 20 can be attached to and detached from the stopper 12 by means of a tightening bolt 22.

In the pot of this embodiment, a handle 20 is normally attached to the top of the stopper 12 by a tightening bolt 22.
is attached and grasped to rotate the stopper 12 to open and close the flow path. Therefore, when performing air bleeding work, the plug 12 is opened, the tightening bolt 22 is removed, and the plug 12
Remove the handle 20 from the plug 12, insert the tool into the internally threaded part 15 of the stopper 12, loosen the sealing member 17 with the O-ring 16, release the airtight seal between it and the inner cylindrical surface 15a, and insert the tool into the internally threaded part 15. The inside and outside of the body 11 are communicated via the O-ring 16.
In this way, air escapes to the outside through the through hole 14 of the plug 12, the through hole 14, and the threaded portion of the seal member 17 in this order. In this case, handle 2
For convenience of operation, the top of the stopper 12 is always placed in an open space.
It is also relatively easy to attach and detach the seal member 17 with the O-ring 16. And, the seal member 1 is always
7 is recessed inside the internally threaded portion 15 of the stopper 12, so it is completely invisible from the outside, and therefore cannot be manipulated by anyone other than the person concerned.

FIG. 3 shows a state in which an internal pressure test or a leakage test is performed. That is, when performing an internal pressure test or a leakage test, the plug 12 is opened, the tightening bolt 22 is pulled out, the handle 20 is removed from the plug 12, and the tool is inserted into the female threaded portion 15 of the plug 12.
The seal member 17 is inserted into the body, the seal member 17 is turned, and the seal member 17 is pulled out from the female threaded portion 15 to establish communication between the inside and the outside of the body 11. Then, a hose end 23 or an outlet 24 is screwed into the female threaded portion 15, and necessary equipment such as a leakage tester is connected thereto to perform an internal pressure test or a leakage test.

(Effects of the invention) As described above, according to the invention, there is no protrusion of the plug seat or other attached parts on the outside of the body, so it is easy to manufacture and not only has a good appearance, but also It is possible to reliably prevent a mischievous opening operation by an outsider, and since the sealing member is oriented along with the handle in a direction that is easy to operate, it has the effect that air bleeding and airtightness inspection can be easily performed.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a cross-sectional view of the pot, Figure 2 is a sectional view of a part of the bag during air bleeding, and Figure 3 is an airtight FIG. 4 is a cross-sectional view showing the state of inspection; FIG. 4 shows a conventional Kotoku;
is a side view. 11...Body, 12...Plug, 14...Through hole, 15...Female thread portion, 15a...Inner cylinder surface, 16
... O-ring, 17 ... Seal member, 18 ... Male thread, 20 ... Handle, 22 ... Tightening bolt.

Claims (1)

[Scope of utility model registration request] A plug for opening and closing a flow path is rotatably provided in the body, and a handle is attached to the plug, and a through hole is formed in the direction of the rotational axis of the plug to communicate the inside and outside of the body. The lower end of the hole is connected to a through hole formed in the plug, and the upper end of the through hole is connected to an inner cylindrical surface having a larger diameter than the through hole, and the upper part of the female thread connected to this inner cylindrical surface is connected to the body. At the same time, a sealing member with a male threaded part attached to the upper part and an O ring attached to the lower part is screwed into the lower end of the female threaded part mentioned above, and the inner cylindrical surface is hermetically sealed with the mentioned O ring, and then the female threaded part is opened to the outside. A kettle with an air bleed mechanism, characterized in that a handle fitted to the top of the stopper is fixed by a tightening bolt screwed into the stopper, and the above-mentioned sealing member is buried below the female threaded part of the stopper.