JP2598277B2 - Ball valve - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a ball valve, and more particularly to a ball valve which is connected to a branch joint of a pipe joint T which is connected in the middle of a pipe for gas consuming equipment, and air purges the consuming equipment. The present invention relates to a ball valve for piping inspection and the like used as a connection on-off valve for inspection of internal pipes and pressures of pipes after use and for a meter, or as a connection / opening valve for hose connection in a specific case.

(Conventional technology and its problems) For this type of application, there has been a danger that a cock or the like may open the valve carelessly or close incompletely without your knowledge, causing gas to leak or leak. For this reason, a connection opening / closing valve of a type in which a valve body that has been closed by being resiliently opened by a spring is opened and closed by quickly attaching and detaching a joint is often used, but the closing of the valve becomes uncertain and gas leaks. The danger was latent.

The present invention has been made in view of the above situation, and has as its object to solve the following problems.

In other words, the connection opening and closing valve for air purging of the consumption equipment, the inner pipe inspection of the piping after the meter, and the pressure inspection is inadvertently opened, incompletely closed without notice, or closed. It is intended to solve the problem of uncertainty and potential danger of gas leakage.

(Means for Solving the Problems) The present invention is configured as follows in order to solve the above problems.

That is, a body having a valve chamber and an inflow hole and an outflow hole connected to the valve chamber on both sides thereof, a ball having a through hole communicating with the inflow hole and the outflow hole in the open position, and a ball that cannot rotate. A ball valve comprising a stem connected to the body and mounted to a stem hole provided radially outward from the valve chamber to the body, wherein the outlet hole and a cap covering the stem are detachably attached to the body from the outlet hole side. , And the space between the body and the cap was sealed by a gasket mounted at a position other than the contact between the body and the cap at the contact surface between the body and the cap.

Further, as an embodiment of the present invention, the gasket is an O-ring, and a projection, a depression or a groove, particularly a slot, for connecting an opening / closing tool is formed on the outer end surface of the stem.

Furthermore, the outer shape of the body on the side of the outflow hole was formed in a hose end shape corresponding to a connection method of a hose connected thereto.

(Operation) The ball valve, which is the connection opening / closing valve of the present invention, is configured as described above, and is usually connected to a branch joint portion of a pipe joint T connected in the middle of piping for gas consuming equipment.

First, when the cap is removed from the body, the outlet hole and the stem are exposed. The outer shape of the body on the outlet hole side is formed in a hose end shape corresponding to the connection method of the hose to be connected to this, so that the hose for inner pipe inspection, pressure inspection, or hose in other specific cases Connect.

Thereafter, when the opening and closing tool adapted to the projection, dent or groove formed on the outer end face of the stem is connected and the stem is rotated by approximately 90 degrees, the through hole of the ball communicates with the inflow hole and the outflow hole of the body.

In this state, air purging of consumption equipment, inspection in pipes,
Perform pressure tests or serve specific applications.

After completing these desired operations, connect the opening and closing tool to the outer end face of the stem again and rotate the stem almost 90 degrees, the ball blocks the communication between the inlet and outlet holes of the body,
Isolate inside and outside of piping.

Next, when the cap is installed from the outflow hole side of the body,
The outlet hole and the stem are covered, so that the stem cannot be operated and the valve is not opened carelessly. Further, in addition to the sealing between the body and the cap at the contact surface between the body and the cap, in addition to the double seal structure for sealing with a gasket attached to a position other than the contact surface, Even if there is a leak between the ball and the body or between the stem and the stem hole, the leak leaks into the cap and does not leak to the outside.

In other words, there is no danger of gas leaking to the outside even if the closure is incomplete or the closure is unreliable without your knowledge.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the ball valve of the present invention.

In the figure, 1 is a ball valve, 2 is a body, 3 is a ball,
4 is a stem, ball valve 1 is body 2 and ball 3
And a stem 4.

5 is a valve chamber, 6 is an inflow hole, 7 is an outflow hole.
Has a valve chamber 5 and an inflow hole 6 and an outflow hole 7 connected to the valve chamber 5 on both sides thereof.

Reference numeral 8 denotes a through hole, and the ball 3 has a through hole 8 communicating with the inflow hole 6 and the outflow hole 7 at the open position shown in FIG.

Reference numeral 9 denotes a stem hole provided in the body 2 radially outward from the valve chamber 5. The stem 4 is non-rotatably connected to the ball 3 and mounted in the stem hole 9.

A cap 10 covers the outflow hole 7 and the stem 4 and is detachably mounted on the body 2 from the outflow hole 7 side.

11 is a contact surface of the body 2 with the cap 10, 12 is a contact surface of the cap 10 with the body 2, and 13 is a gasket attached to a position other than the contact surfaces 11 and 12. The space between the caps 10 is double-sealed by the contact between the contact surface 11 of the body 2 and the contact surface 12 of the cap 10 and the gasket 13.

In the ball valve 1 of FIG. 1, the gasket 13 is an O-ring.

Numeral 14 denotes an outer end face of the stem 4, on which a projection, a dent or a groove connected to an opening / closing tool is formed.

2 (a) and (b) are front views of the system 4 showing an embodiment of the outer end face 14 of the stem, and FIG. 2 (c) is a similar partial cross-sectional front view.

In FIG. 2 (a), a strip projection 15 is formed on the outer end face 14, which corresponds to a side view of the stem 4 in FIG. In FIG. 2 (b), a slot 16 is formed in the outer end face 14. In FIG. 2C, a hexagonal depression 17 is formed.

Referring again to FIG. 1, reference numeral 18 denotes a connection portion on the side of the outflow hole 7 of the body 2, and this connection portion 18 is formed in a shape corresponding to a connection method of a hose connected thereto. Is a hose end type shown in Fig.4.7 of JIS S2120,
A lock groove 18a for locking a lock ball (not shown) of the quick joint is formed on the outer periphery of the connection portion 18.

In FIG. 1, screws are used to detachably attach the cap 10 to the body 2, but other methods may be used.

In FIG. 1, 19 is a ball seat, 20 is an insert, and 21 is a stem packing.

 Next, the operation of the embodiment shown in FIG. 1 will be described.

In the ball valve 1, an inflow hole 6 side of the body 2 is connected to a branch joint portion of a pipe joint T connected in the middle of a pipe for gas consuming equipment (not shown).

First, when the cap 10 is removed from the body 2, the outflow hole 7 and the stem 4 are exposed. The connection portion 18 on the outflow hole 7 side of the body 2 is formed in a hose end shape corresponding to a connection method of a hose connected thereto, so that an inner pipe inspection,
Connect a pressure test hose or other specific case hose.

Thereafter, an opening / closing tool that fits into the protrusion, dent or groove formed on the outer end face 14 of the stem 4 is connected to the stem 4 so that the stem 4 is substantially 90
When the ball 3 is rotated by an angle, the through hole 8 of the ball 3 communicates with the inflow hole 6 and the outflow hole 7 of the body 2.

In this state, the air purging of the consuming equipment, the inspection of the inside of the pipe, the pressure inspection, or the other specific use is performed.

After completing these functions, the opening / closing tool is connected to the outer end surface 14 of the stem 4 again, and the stem 4 is rotated by approximately 90 degrees, so that the ball 3 communicates with the inflow hole 6 and the outflow hole 7 of the body 2. And isolate the inside and outside of the piping.

Next, when the cap 10 is attached from the outflow hole 7 side of the body 2, the outflow hole 7 and the stem 4 are covered, so that the stem 4 cannot be operated and the valve is not opened carelessly. . In addition to sealing between the body 2 and the cap 10 by contact at the contact surfaces 11 and 12 between the body 2 and the cap 10. Due to the double sealing structure in which the gasket 13 is mounted at a position other than the contact surfaces 11 and 12, a seal is provided between the ball 3 and the body 2 or between the stem 4 and the stem hole 9, for example. Even if there is a leak from the cap 10, the leak leaks into the cap 10 and does not leak to the outside.

In other words, there is no danger of gas leaking to the outside even if the closure is incomplete or the closure is unreliable without your knowledge.

(Effects of the Invention) As is clear from the above, according to the ball valve of the present invention, the following excellent effects can be obtained.

That is, when the ball valve of the present invention is used as a connection on-off valve for air purging of consuming equipment, for inspection of the inner pipe of a pipe after the meter, and for pressure inspection, the ball valve is inadvertently opened or unknown. There is no danger of gas leaking due to incomplete closure or uncertain closure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a ball valve of the present invention, FIGS. 2 (a) and 2 (b) are front views showing an embodiment of an outer end face of a stem of the present invention, and FIG. (c) is a front view in which a part of the stem is sectioned. 1 ... ball valve, 2 ... body 3 ... ball, 4 ... stem 5 ... valve chamber, 6 ... inlet hole 7 ... outlet hole, 8 ... through hole 9 ... stem hole, 10 ... Cap 11 Contact surface of body 12 Contact surface of cap 13 Gasket 14 Outer end surface of stem 16 Slot groove 18 Connection part on body outlet hole side

Continuing on the front page (72) Inventor Takashi Tajima 5-1-1 Hirano-cho, Higashi-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Toshio Shibuchi 2-10-16 Minamikagaya, Suminoe-ku, Osaka-shi, Osaka New (56) References Japanese Utility Model Sho-58-106683 (JP, U) Japanese Utility Model Sho-61-114168 (JP, U)

Claims (5)

(57) [Claims] 1. A body having a valve chamber and an inflow hole and an outflow hole connected to the valve chamber on both sides thereof, a ball having a through hole communicating with the inflow hole and the outflow hole in the open position, A ball valve comprising a stem immovably connected to the body and mounted to a stem hole provided radially outward from the valve chamber in the body, wherein the outflow hole and a cap covering the stem are attached to the body by the outflow side. A ball valve which is removably mounted on the body and which is sealed by a gasket mounted between the body and the cap at a contact surface between the body and the cap and at a position other than the contact surface. . 2. The ball valve according to claim 1, wherein said gasket is an O-ring. 3. The ball valve according to claim 1, wherein a projection, a dent, or a groove for connecting an opening / closing tool is formed on an outer end surface of said stem. 4. The ball valve according to claim 3, wherein a slot is formed in said outer end surface of said stem. 5. The ball valve according to claim 1, wherein an outer shape of the body on the side of the outlet hole is formed in a shape corresponding to a connection method of a hose connected thereto.