JPH0112986B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball valve type water stop valve used for waterworks, etc., and particularly to a structure of a ball valve type water stop valve that allows flow rate adjustment.

As is well known, ball valve type water stop valves are popular as water stop valves because they can perform double sealing at two locations on the ball valve, and because the sealing surface is spherical, there is less deformation of the ball seat. Although it has excellent characteristics, if the ball valve is left in a half-open state for a long time, the ball seat that has come off the surface of the ball valve will locally deform, causing water leakage. Type stop valves must be used in the fully open and fully closed states.

By the way, in recent water supply projects, there has been a considerable disparity in water pressure in pipes due to the rise of high-rise houses and the development of hilly residential areas, and in places with high water pressure, it is necessary to reduce the flow rate when supplying water. It is increasing. Therefore, the easiest way to adjust the flow rate is to adjust the opening of the stop valve, which is always installed together with a water meter in each home or business, but as mentioned above, the ball valve type It was difficult to adjust the opening of the stop valve.

As described above, in view of the problem of adding a flow rate adjustment function to a ball valve type water stop valve, the present invention has been developed so that a ball valve can be used in a fully open or fully closed state, and a flow path cross section can be formed as required. The purpose is to obtain a structure in which a ball valve housed in a base material is opened and closed by a handle that is fixed to a spindle. A flow rate limiting member is slidably housed therein, and an adjustment screw rotatably connected to the flow rate limiting member is screwed into the inner end of the threaded hole through which the spindle passes, and the flow rate passing through the bottom wall slot of the opening/closing sleeve is adjusted. It is proposed that the tongue-shaped restriction plate of the restriction member is inserted into and removed from a slot formed in the ball valve so as to intersect the water passage hole at right angles.

Embodiments of the invention will now be described in detail with reference to the drawings.

1 and 2, an upstream pipe joint 3 and a downstream pipe joint 4 are formed on a base material A consisting of a main body 1 and a ball holder 2, and a pair of both ends are formed in the base material A. A ball valve 7 seated on ball seats 5 and 6 is accommodated. That is, the ball valve 7 has a water hole 8 that can communicate with the upstream pipe joint 3 and the downstream pipe joint 4, and has a handle that is fixed with a set screw 10 to a spindle 9 rotatably supported on the upper part of the main body 1. 11 by about 90 degrees, the upstream pipe joint 3 and the downstream pipe joint 4 can be isolated. The square shaft portion 9a of the spindle 9 has a circumferential projection 12a.
A rotation prevention plate 12 having a rotation prevention plate 12 is fitted, and a peripheral surface protrusion 12a of the rotation prevention plate 12 is positioned in a 1/4 arc groove 13 formed on the end surface of the cylindrical portion 1a of the main body 1. Therefore, the rotational movement of the handle 11 and the spindle 9 is limited by the rotation prevention plate 12 to only about 90°.

A bottomed opening/closing sleeve 14 is rotatably accommodated in the cylindrical portion 1a of the main body 1, and an inner end disk 9 of the spindle 9 is attached to the open end of the opening/closing sleeve 14.
A pawl 16 is formed to be inserted into the end face recess 15 of b.
4 can be rotated. A cylindrical flow rate restriction member 17 is housed inside the opening/closing sleeve 14 so as to be movable in the length direction of the opening/closing sleeve 14 . A tongue-shaped restriction plate 18 integrally formed with the flow rate restricting member 17 It projects toward the ball valve 7 through the bottom wall slot 19. A slot 21 is formed in the ball valve 7 and intersects the water passage hole 8 at right angles, and the tip of the tongue-shaped restriction plate 18 is inserted into the water passage hole 8 through the slot 21. .

On the other hand, a screw hole 21 that passes through the center of the spindle 9 and into which the set screw 10 can be screwed is formed, and is rotated by a screwdriver B inserted into the screw hole 21 at the inner end of the screw hole 21. An adjusting screw 22 is screwed into the opening/closing sleeve 14 so as to be movable in the length direction thereof. The head 22a of the adjusting screw 22 is a circular recess 2 formed on the upper end surface of the flow rate restricting member 17.
The adjustment screw 2
The second head 22a is prevented from being pulled out from the circular recess 23.

Since the ball valve type water stop valve according to the present invention has the above structure, the handle 1 is connected from the spindle 9 to the handle 1.
1 and set screw 10, insert the screwdriver B into the screw hole 21 and rotate the adjusting screw 22 to adjust the flow rate. That is, adjusting screw 2
2, since the rotational movement of the flow rate restriction member 17 is blocked by the opening/closing sleeve 14, only the vertical movement of the adjustment screw 22 is transmitted to the flow rate restriction member 17, and the tongue-like shape relative to the water passage hole 20 is The depth of intervention of the restriction plate 18 limits the cross section of the flow path. Therefore, water can be saved by changing the position of the tongue-shaped restriction plate 18 according to the water pressure of the piping. Furthermore, in the structure of the present invention, the handle 1
Since opening/closing and flow rate adjustment can be performed only on one side, flow rate adjustment can be easily performed with a water stop valve installed in the water meter. When the stop valve of the present invention is fully assembled, the adjustment screw 22 cannot be operated from the outside, so there is no possibility of the flow rate being adjusted later due to mischief or the like.
Opening and closing the ball valve 7 while restricting the flow rate also has the effect of alleviating the water hammer phenomenon. The opening/closing movement of the handle 11 when opening/closing the ball valve 7 is caused by the spindle 9, the opening/closing sleeve 14,
The rotational motion is transmitted to the tongue-shaped restriction plate 18 and then to the ball valve 7 in this order.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a ball valve type water stop valve according to the present invention, FIG. 2 is a sectional view taken along the - line in FIG. FIG. 4 is an enlarged perspective view of the ball valve. A... Base material, 7... Ball valve, 8... Water hole,
9...Spindle, 11...Handle, 14...
Opening/closing sleeve, 17...Flow rate adjustment member, 18...
Tongue-shaped restriction plate, 21...slot, 22...adjustment screw.

Claims (1)

[Claims] 1. In a ball valve type water stop faucet that is opened and closed by a handle that fixes a ball valve housed in a base material to a spindle, a flow restriction member is slidably housed in an opening/closing sleeve that is rotated by the spindle, and An adjusting screw rotatably connected to the flow rate limiting member is screwed into the inner end of the threaded hole through which the tongue-shaped limiting plate of the flow rate limiting member that passes through the bottom wall slot of the opening/closing sleeve is inserted into the water passage hole. A ball valve type water stop faucet capable of adjusting the flow rate, characterized in that it is inserted into and out of slots formed in the ball valve so as to intersect at right angles.