JP3017511U - Air purge device for gas tap - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an air purging device for a gas plug in which a hose is easily connected and the hose does not rotate unintentionally. [Structure] Outlet 4a of air purge hole 4 of gas stopper body 1
A concave groove 5 is formed in the hollow groove 5, the hose 11 is connected to the hose end member 7 that fits in the concave groove 5, and then the hose end member 7 is attached to the purge hole 4 using the fixing screw 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air purge and gas tightness or dynamic pressure inspection device for a gas plug.

[0002]

[Prior art]

 In the conventional gas stopper, a purge hole for air purging and airtightness or dynamic pressure inspection is provided on the gas stopper main body side, and the closure (handle) is fully closed, half-opened or fully opened, and air purge or It is known that an airtightness test or a dynamic pressure test can be performed (Japanese Patent Application No. 62-106067). However, in this known example, since the purge hole is formed so as to project in the direction perpendicular to the gas stopper, it is necessary to connect a hose for air purging or a hose for airtightness inspection to the purge hole. However, it is possible to connect only from the right angle direction, and if there is an object in the direction of this purge hole, the hose cannot be connected or it is very difficult to connect depending on the conditions. Therefore, in order to eliminate this defect, a pipe having a substantially L-shape that is parallel to the gas stopper main body is rotatably attached to the purge hole so that the hose can be connected from the 360 ° direction. A devised gas cock has been proposed (Japanese Utility Model Publication No. 4-9489).

[0003]

[Problems to be solved by the device]

 However, in the case of the invention disclosed in Japanese Utility Model Publication No. 4-9489, when the hose is connected to the tube, the tube is designed to rotate freely. If you try to insert it, the tube side will rotate and escape, and it will be difficult to connect.

[0004]

[Means for Solving the Problems]

 The present invention proposes an air purging device for a gas plug that can be easily connected to the purging hole when connecting an air purging hose or a hose of an airtightness tester and the hose connecting member does not rotate undesirably. Its purpose is to construct the following:

1. An air purge hole is provided on the plug body, an internal screw is provided in the outlet of the air purge hole, a concave groove is formed at the tip of the outlet of the air purge hole, and an external shape that fits in the concave groove The hose end member is penetrated at a right angle and the fixing screw is inserted, and the purge introducing passage communicating with the purge passage formed in the hose end member is formed. This purge introducing passage is the tip of the fixing screw. An air purging device for a gas plug, characterized in that the outer screw formed on the above is screwed onto the inner screw of the purge hole to communicate with the purge hole.

2. The purge branch hole communicating with the purge hole is provided for the closure incorporated in the gas stopper so that air purge and airtightness inspection can be performed in a state where the closure is half-opened. Air purge device for gas tap.

[0007]

[Action]

 A hose is connected to the hose end member first, and then attached to the purge hole using a fixing screw.The hose end member is set in the groove formed at the outlet of the purge hole. The rotation is blocked, and the direction of the hose is always constant. Air purging and airtightness inspection are performed by operating the closure (handle), and after completion, attach a plug to the outlet of the purge hole to seal it.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 and 2, 1 is a gas stopper body, 2 is a handle, 3 is a closure that is opened and closed by the handle 2, 3a is an opening / closing hole, and 4 is a purge formed in the flank of the gas stopper body 1. The outlet 4a side of the purge hole 4 projects, and a horizontal groove 5 is formed at the tip of the outlet 4a, and an internal screw 4b is provided in the outlet 4a. Reference numeral 6 denotes a plug for sealing the purge hole 4 at an outlet 4a of the purge hole 4 by being screwed into an internal screw 4b. The plug 6 is provided in the purge hole 4 except during air purge and airtightness or dynamic pressure inspection. Is attached to. 3 and 4 show a purging device which is used by being attached to the outlet 4a of the purging hole 4 at the time of air purging and airtightness or dynamic pressure inspection. The purging device has a purge passage 8 inside. It is composed of an end member 7 and a fixing screw 9 with a purge introducing passage 10 that communicates with the purge passage 8 that is inserted so as to penetrate the hose end member 7 at a right angle. Reference numeral 7a is a hose connecting portion, and 9a is an external screw that is screwed onto the internal screw 4b. The hose end member 7 has an outer shape that fits in the groove 5.

FIGS. 5 and 6 show a state in which the purge device shown in FIGS. 3 and 4 is attached to the purge hole 4 on the gas plug body 1 side, and the hose 11 is a hose connecting portion of the hose end member 7 in advance. 7a, and then using the fixing screw 9 to fit the outer shape of the hose end member 7 into the concave groove 5 formed in the outlet 4a of the purge hole 4 and screw the outer screw 9a of the fixing screw 9 into the inner screw 4b. In the case of air purging, the air is to be installed in the gas stopper main body 1 → purge hole 4 → outlet 4a → purge introduction path 10 → purge flow path 8 → hose 11 → atmosphere or airtightness tester or dynamic pressure tester. Flows. 7 (A) and 7 (B) show a gas plug in which a purge hole 4 is provided on the downstream side of the closure 3, and FIG. 7 (A) shows air on the downstream side (gas appliance side) when the closure 3 is fully closed. When performing a purge or airtightness inspection, (B) is an explanatory diagram of a gas plug in the case of performing an upstream / downstream air purge or airtightness inspection or a dynamic pressure inspection with the closure 3 fully opened. 8 (A), 8 (B), and 8 (C) are gas plugs in which the branch 3 for air purging is provided in the closure 3, and FIG. 8 (A) shows the air on the downstream side when the closure 3 is fully closed. When performing a purge or airtightness test, (B) shows the upper / downstream air with the closure 3 half open, and (C) shows the upper / downstream air with the closure 3 fully opened. It is explanatory drawing in the case of performing a purge, an airtight inspection, or a dynamic pressure inspection.

[0010]

[Effect of device]

 As described above, according to the present invention, the groove for accommodating the hose end member is formed at the outlet of the air purge hole, and the hose end member to which the hose is connected in advance is attached to the air purge hole by using the fixing screw. Therefore, compared to the conventional rotation-free hose end member (tubular body), there is no problem that the hose end member side escapes when connecting the hose and is difficult to connect. Further, since the hose end member is accommodated in the concave groove at the outlet of the air purge hole, it does not inadvertently rotate (direction change) after mounting, and therefore the fixing screw does not loosen.

[Brief description of drawings]

FIG. 1 is a front view of a gas plug according to the present invention.

FIG. 2 is a sectional view of a gas plug.

FIG. 3 is an explanatory diagram of a purging device.

FIG. 4 is a sectional view taken along the line AA ′.

FIG. 5 is an explanatory view showing a state where a purging device is attached to an air purging hole of a gas plug.

FIG. 6 is a sectional view taken along line BB ′.

FIG. 7 is an explanatory diagram of a state at the time of air purge and airtightness inspection of a gas plug provided with an eccentric air purge hole.

FIG. 8 is an explanatory diagram of an air purge, an airtight inspection, and a dynamic pressure inspection of a gas plug having a purge branch hole on the closing side.

[Explanation of symbols]

 1 Gas Plug Main Body 2 Handle 3 Closer 4 Purge Hole 5 Concave Groove 5 Plug 7 Hose End Member 7a Hose Connection 8 Purge Flow Path 9 Fixing Screw 10 Purge Introduction Path 11 Hose 12 Purge Branch Hole

Claims (2)

[Scope of utility model registration request] 1. An air purge hole is provided in a plug body, an internal screw is provided in an outlet of the air purge hole, a concave groove is formed at a tip of the outlet of the air purge hole, A hose end member having an outer shape that fits in the groove is penetrated at a right angle to insert a fixing screw, and a purge introducing passage communicating with a purge passage formed in the hose end member is formed. An air purging device for a gas plug, comprising a structure in which an outer screw formed at a tip of a fixing screw is screwed into an inner screw of the purge hole to communicate with the purge hole. 2. A structure in which a purge branch hole communicating with a purge hole is provided for a closure incorporated in a gas stopper so that air purging and airtightness inspection can be performed in a state where the closure is half-opened. An air purging device for a gas plug according to claim 1.