JPS6088280A - Ball-valve type stop cock - Google Patents

Abstract

PURPOSE:To improve practical-use performance by preventing water hammering due to sharp opening and closing by decelerating the rotational motion of a handle by a planetary gear mechanism and transmitting said rotational motion to a ball valve and permitting the sectional area of the flow passage of the ball valve to be adjusted by the revolution operation for an adjusting valve. CONSTITUTION:When a spindle 9 is revolved by a handle 11, a planetary gear 15 performs planetary movement, and the decelerated rotational motion is transmitted to a revolution shaft 20, and a ball valve 7 is slowly opened and closed independently of the sharp operation of the handle 11, and the generation of water hammering is suppressed. Ater a stop screw 10 is demounted and a handle 11 is removed, if a driver is inserted into a penetration hole 30, and an adjusting screw 32 is turned, then, a flow-rate restricting member 26 whose rotational motion is suppressed by an opening and closing sleeve 23 is shifted in the vertical direction. Therefore, the sectional area of a flow passage, namely the flow rate can be adjusted according to the depth of intrusion of a tongue-shaped restriction plate 27 for a water passing hole 8.

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 and prevents water hammer action when opening and closing.

As is well known, the ball valve type water stop valve is a water stop valve because of the fact that it can perform double sealing at two places on the ball valve, and because the seal surface is spherical, there is less deformation of the pole seat. However, it has excellent characteristics as a ball valve, but when the ball valve is left in a half-open state! If left in a trench for a long time, the ball seat that has come off the surface of the ball valve will undergo local deformation, causing water leakage, so ball valve type water stop valves are available in sleeves that can 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 residential buildings 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, it is convenient to adjust the flow rate by adjusting the opening of the water stop valve, which is always installed together with a water meter in each home or place. It was difficult to adjust the opening of the faucet.

Furthermore, in conventional ball valve type water stop valves, a spindle directly connected to the ball valve is operated by a handle, so water hammer effect when the ball valve is opened and closed poses a problem. That is, since the ball valve is directly rotated by a spindle to which a handle is attached to a conventional ball valve type water stop faucet, it can be opened and closed by rotating the handle 90 degrees. Therefore, if the nondle is opened or closed rapidly, an unexpectedly large water hammer effect will occur in areas with high water pressure, leading to damage to the water meter and rupture of lead pipes. In particular, the number of accidents such as breakage and bursting of canals tends to increase in proportion to the rise in the number of high-rise houses and the development of residential land in hilly areas, so there is an urgent need for countermeasures to be taken by water supply organizations in various regions.

In view of the problems of the conventional pole valve type water stop valve as described above, the present invention has a flow rate adjustment function that allows the ball valve to be used in a fully open and fully closed state, and can prevent sudden opening and closing operations of the ball valve. The purpose is to obtain a structure in which a ball valve housed in a base material is opened and closed by a handle fixed to a spindle, and a disc that can freely rotate on its axis is incorporated in the top of the base material. , a plurality of planetary gears meshing with the ring gear on the inner periphery of the base metal are supported on the disk, and the sun gear on the inner end of the spindle connected to the handle is connected to the M
The rotary shaft rotated by the disk is engaged with the star gear, and the rotary shaft rotated by the disk is rotatably connected to an opening/closing sleeve inside the base material, a flow rate restriction member is slidably accommodated in the opening/closing sleeve, and the through hole 17 of the spindle is inserted into the opening/closing sleeve. An adjustment screw rotatably connected to the flow rate restriction member is screwed into the facing screw hole of the rotating shaft, and the tongue-like restriction plate of the flow rate restriction member that penetrates the bottom wall slot of the opening/closing sleeve is perpendicular to the water passage hole. It is proposed that the valve be inserted into and removed from slots formed in the busy ball valve so as to intersect with each other.

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

In FIGS. 1 and 2, a base material AK consisting of a main body 1 and a ball valve 2 is formed with an upstream pipe joint 3 and a downstream pipe joint 4, and a pair of both ends are formed in the base material A. A ball valve 7 seated on the ball seats 5, 6 of 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 provided above the main body 1. 11e, by rotating about 360 degrees as described later, the upstream pipe joint 3 and the downstream pipe joint 4 can be cut off.

A cylindrical casing 13 containing a freely rotatable disk 12 is fixed to the upper part of the base material A. The surface of the disk 12, the details of which are shown in FIG.
A is integrally molded, and the support ring 12b is supported by these spacer ribs 12g.

In the space between the disk 12 and the support ring 12b,
Three planetary gears 15 that can rotate around a planetary shaft 14 spanned between the disk 12 and the support ring 12b are positioned, and these planetary gears 15 are connected to the cylindrical casing 13.
It is meshed with a ring gear 16 formed on the inner peripheral surface of.

On the other hand, a cap 17K that closes the cylindrical casing 13
A spindle 9 to which a U-handle 11 is attached is rotatably supported, and the sun gear 1B at the inner end of the spindle 9 is inserted into a support plug 12b and meshes with each planetary gear 15. Further, the square shaft portion 20a of the rotary shaft 20 rotatably positioned at the lower part of the cylindrical casing 13 is inserted into the square hole 19 at the center of the disk 12. Therefore, when the spindle 9 is rotated by the spindle 11, the planetary gear 15 performs a freewheeling motion, and the decelerated rotational motion is transmitted to the rotating shaft 20.

That is, if the number of teeth of the ring gear 16 is N1 and the number of teeth of the sun gear 18 is N2, the reduction ratio is given as 1 i + - 2, so if the ratio of the number of teeth of both is designed to be 3 = 1, the steering wheel How many 90 degrees can the rotating shaft 20 be rotated in one rotation of 11? For this reason, as will be understood from the description below, even if you try to rapidly open and close the ball valve 7 by operating the handle 11, the handle 18 rotates 90 degrees and the ball valve 7 rotates only about 22 degrees. The water hammer effect that sometimes occurs will be greatly alleviated.

A rotation prevention plate 21 having a curved protrusion 21a is fitted to the base of the square shaft portion 20a of the rotating shaft 20, and the circumferential surface protrusion 21a of the rotation prevention plate 21 is formed on the end surface of the cylindrical portion 1a of the main body l. 14 is located in the arcuate groove 22. Therefore, the rotational movement of the handle 11 and the spindle 9 is prevented by the rotation prevention plate 2.
1, the rotation is limited to approximately 90 degrees and 72 degrees.

Returning to the structural description, a bottomed opening/closing sleeve 23 is rotatably accommodated in the cylindrical portion la of the main body 1, and the open end of the opening/closing sleeve 23 is connected to the inner end disk 20b of the rotating shaft 20.
A pawl 25 is formed to be inserted into the end face recess 24, and the opening/closing sleeve 23 can be rotated by rotation of the rotating shaft 2o. Further, a cylindrical flow rate restriction member 26 is housed inside the opening/closing sleeve 23 so as to be movable in the length direction of the opening/closing sleeve 23 . bottom wall slot 2
8 and protrudes toward the pole valve 7 side. A slot 29 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 27 is inserted into the slot 29.
Through the water hole 8, there is a busy intervention.

On the other hand, in the center of the spindle 9 is a through hole 3o into which a set screw 10 for fixing the handle can be attached.
is formed, and the screwdriver B can be inserted into the through hole 3o by removing the set screw 10. A screw hole 31 is formed in the center of the rotating shaft 20 facing the inner end of the through hole 3o, and a screwdriver B for inserting the adjusting screw 32 screwed into the screw hole 31 into the through hole 30. The position can be adjusted with . In addition, the head 13 of the adjustment screw 32
2a is a circular recess 3 formed on the upper end surface of the flow rate restricting member 26.
3, the head 32 of the adjusting screw 32
a is prevented from being pulled out from the circular recess 33.

The illustrated embodiment has the above structure, so after removing the handle 11 and set screw 10 from the spindle 9,
Insert the screwdriver B into the through hole 30 and tighten the adjustment screw 3.
By rotating 2, you can adjust the flow rate. That is, adjusting screw 3
2, since the rotational movement of the flow rate restriction member 260 is blocked by the opening/closing sleeve 23, only the vertical movement of the adjustment screw 32 is transmitted to the flow rate restriction member 26, and the tongue-shaped restriction plate 27 relative to the water passage hole 8 is rotated. The flow path cross section is limited by the intervention depth K of . Therefore, water can be saved by changing the position of the tongue-shaped restriction plate 21 according to the water pressure of the piping. In addition, in the illustrated structure, the handle 11
Since opening/closing and flow rate adjustment can be performed only on the side, flow rate adjustment can be easily performed with a water stop valve installed in the water meter. When the water stop valve shown in the figure is completely assembled, the adjustment screw cannot be operated from outside the metal 32 metal, so there is no chance of the flow rate being adjusted later due to mischief or the like.

The opening and closing movement of the handle 11 when the ball valve 7 is opened and closed is caused by the spindle 9, the planetary gear 15, the disk 12,
The rotational motion is transmitted to the rotating shaft 20, the opening/closing sleeve 23, the tongue-shaped restriction plate 27, and the ball valve 7 in this order.

As a result, according to the present invention, it is possible to obtain a ball valve type water stop faucet that can alleviate the water hammer effect caused by rapid opening/closing operations of the handle, and can freely set the flow rate using an adjustment screw.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a ball valve type water stop valve according to the present invention, and FIG.
The figure is a cross-sectional view taken along line G in Figure N1, Figure @3 is a cross-sectional view taken along line G in Figure 1, Figure 4 is an exploded perspective view of the main part of the same ball valve type water stop valve, and Figure 5 is an enlarged perspective view of the ball valve. A...Base material, 7...Ball valve, 9...Spindle, 11...Handle, 12...
Disc, 15... Planetary gear. 16...Ring gear, 18...Sun gear, 20.
... Rotating shaft, 23... Opening/closing sleeve, 26... Flow rate restriction member, 27... Tongue-shaped restriction plate, 2C! ...slot), 30 K1N hole, 32...adjustment screw. Patent applicant: Nihon Valve Industries Co., Ltd. Figure 1 ■ 2 Figure 2 Figure 3 Figure 5 Figure 9

Claims (1)

[Claims] 1) A ball valve accommodated in the base material is opened and closed by a handle fixed to a spindle, and a disc that can freely rotate is built into the top of the base material, and a disc that can rotate freely is attached to the top of the base material. A plurality of loose two-tone gears are supported that mesh with a ring gear on the periphery, a sun gear at the inner end of a spindle coupled to a handle is meshed with the planetary gear, and a rotating shaft rotated by the disc is inserted into the base material. a rotary joint in the opening/closing sleeve of the opening/closing sleeve, and a flow restriction member is slidably accommodated in the opening/closing sleeve;
An adjustment screw rotatably connected to the flow rate restriction member is screwed into a screw hole of the rotary shaft facing the negative passage hole through which the spindle passes, and the tongue-shaped flow rate restriction member is inserted through the bottom wall slot of the opening/closing sleeve. A ball valve type water stop faucet characterized in that a restriction plate is removably inserted into a slot formed in a ball valve that intersects a water passage hole at right angles.