JPH04157266A - Rate-of-flow regulating valve - Google Patents

Abstract

PURPOSE:To carry out fine regulation of the rate of flow in the period from the forcet opening as initial stage till full opening by forming a valve seat in such a way that the upper part of the water supply hole is tapered and the lower part is straight. composing a piece packing at the water supply hole from a valve element contacting the tapered surface and a skirt to be fitted to the straight portion, and furnishing the skirt with a slit. CONSTITUTION:A piece packing 4 comprises a valve element 5 in contact with a water flow hole 3a in the tapered surface and a skirt 10 to be fitted to a straight water flow hole 3b. When a handle 9 is turned a little to lift the piece packing 4 gradually, a slit 11 in the skirt 10 will confront the water flow hole 3a to actuate water flow from the primary side flow-path 1a to the secondary side flow-path 1b through this slit 11, and water flow amount increases with turning of the handle 9. If the handle 9 is turned further, the skirt 10 separates from the water flow hole 3b, and the water flow amount increases quickly. In this period, adjustment of the rate of flow associate with the degree of forcet opening is proportioned with handle 9 turning, and it is practicable to carry out the fine regulation.

Description

[Detailed description of the invention] [Industrial application field]

The present invention is a faucet or stop valve for fluids, especially water supply, comprising:
This invention relates to a valve that has a so-called throttle valve structure in which a part of a piece of gasket fits into a water outlet of a valve seat, and can adjust the flow rate.

[Prior art]

As a faucet or stop valve with this type of throttle valve structure, the fifth to sixth
The configuration shown in the figure is well known as a typical conventional example. In this conventional example, a valve body 1 is provided with a partition wall 2 inside thereof, and is divided into a downstream flow path 1a and a secondary flow path 1b, and a valve seat 3 is formed in the partition wall 2. Additionally, a tapered water outlet 3a is provided, a piece packing 4 that fits into the water outlet is provided, and a tapered valve body 5 is attached to the piece packing. The spindle 6 of the top packing 4 rotatably engages with a hole 7a at the lower end of a spindle 7. The spindle is supported by a lid 8, and a handle 9 is attached to the upper end of the spindle. By rotating the spindle 7 in the direction, the spindle 7 moves up and down, and the above-mentioned piece packing 4 is disengaged from and fitted to the water outlet 3a, that is, the throttle valve mechanism opens the -next side flow path 1.
A and the secondary side flow path 1b are communicated or cut off, that is, the valve is opened and closed. The amount of water flowing is adjusted by driving the handle 9 and adjusting the distance between the top packing 4 and the water opening 3a.

[Problem to be solved by the invention]

The faucet or water stop valve with the throttle valve mechanism according to the conventional example always has a tapered water outlet 3a when the valve is opened or closed.
The taper-shaped valve body 5 is in a state facing the water, and the tapered valve body 5 is always exposed to flowing water. In particular, when the gap between the water inlet 3a and the valve body 6 is narrow when opening and closing the valve, the valve body 5 gradually wears away due to the high-speed fluid, and the valve must be throttled to reduce the amount of water flowing. When this occurs, the wear on the valve body 5 becomes even more noticeable, and this wear phenomenon is not necessarily uniform over the entire surface of the valve body 5, and there are some areas where there is more wear and some places where there is less wear, and it is difficult to stop the wear. It becomes necessary to tighten the valve gradually more strongly when water is used, and with such repeated use, the valve body 5 gradually becomes thinner, and there is a disadvantage that it becomes unable to stop water. Therefore, in the conventional example, there are problems that must be solved in terms of long-term use and adjusting the flow rate from a minute flow rate to a maximum flow rate without affecting the valve body.

[Means to solve the problem]

As a specific means for solving the problems of the conventional example, the present invention provides a partition wall inside a valve body, a valve seat that covers a water inlet in the partition wall, and a valve seat that can be engaged and disengaged from the water inlet by operating a handle. The water inlet of the valve seat is formed with a tapered upper part and a straight lower part, and the 1m piece seal has a skirt that fits into the valve body that comes into contact with the tapered surface and the straight part. The present invention provides a flow rate regulating valve characterized in that the skirt portion is provided with a plurality of slits in the vertical direction, and by providing the slits in the skirt portion,
Fluid flows out through the slit from the initial open state to the fully open state, and during this period, the flow rate can be adjusted arbitrarily and finely, and the valve body has almost no effect on the fluid outflow. Since the valve body is not subjected to any damage, there is no wear and tear on the valve body, allowing long-term use.

【Example】

Next, the present invention will be explained in more detail with reference to illustrated embodiments. In order to facilitate understanding, the same parts as in the conventional example will be described with the same reference numerals. In the first embodiment shown in FIGS. 1 and 2, the valve body 1 is provided with a partition wall 2 inside thereof, as in the conventional example, and is divided into a downstream flow path 1a and a secondary flow path 1b. At the same time, a valve seat 3 is formed on the partition wall 2. This valve seat 3 is provided with a water inlet 3a formed in a true tapered surface than in the conventional example, and a water inlet 3b formed in a straight line in a series above and below. A top gasket 4 that fits into the water flow 08as3b is provided, and a valve body 5 that contacts the taper surface water port 3a is attached to the top gasket 4, and a skirt portion 10 that fits into the straight water flow port 3b is attached to the lower end. A plurality of slits 11 are formed in the skirt portion. The slits are chevron-shaped or groove-shaped, and in the illustrated embodiment, four slits 11 are formed at equal intervals. The top packing 4 has a shaft 6 rotatably engaged with a hole 7a at the lower end of a spindle 7, and the spindle is connected to a lid 8.
A handle 8 is attached to the upper end of the handle 8, and by rotating the handle in a predetermined direction, the spindle 7 moves up and down, and the top gasket 4 is connected to the water outlet 3a. 3b, thereby opening and closing the valve by blocking or communicating the downstream flow path 1a and the secondary side flow path 1b. In the second embodiment shown in FIG. 3, the slit 11 provided in the skirt portion 10 is simply formed into a rectangular groove shape, and the other configuration is the same as that of the first embodiment. . In the figure, 12 is a ring rotatably connecting the box packing 4 and the spindle 7, 13 is a gasket, 14 is a packing, 15 is a packing holding nut, and 16 is a handle fixing screw.

[Explanation of operation]

Regarding the flow rate regulating valve of the present invention having the above-mentioned configuration, the state of regulating the flow rate will be explained with reference to FIG. 4. The figure shows the valve opening (handle rotation speed) and flow rate (L/d) when the valve is connected to a water pipe with a nominal diameter of 20 mm and the differential pressure between the negative side and the secondary side is set to 4 kgf/d. m i (expressed on a logarithmic scale), where the solid line a represents the valve of the present invention and the dotted line represents the conventional valve. First, when opening the valve by turning the handle 9 from the water stop (fully closed) position and lifting the top seal 4 upwards, if the handle 9 is turned a little (within 0.5 turns), the valve will open. As the body 5 moves away from the tapered water outlet 3a, the skirt portion 10 moves away from the straight water outlet 3b.
It will start to be pulled out slightly, but in this state,
Only water leaks from the skirt portion 10, the straight water outlet 3b, and the sliding surface, and the valve has not yet reached the open state. By further rotating the handle 9 from this position, the bottle is opened. That is, by rotating the handle 9 more than approximately 0.6 rotations, a portion of the slit 11 of the skirt portion 10 faces the water outlet 3a of the tapered surface, and enters the secondary flow path 1b through the slit 11. Water will begin to flow. Next, by sequentially rotating the handle 9, the top seal 4 is gradually pulled up, and the amount of water facing the water outlet 3a of the slit 11 increases, so that the amount of water passing through is also gradually increased. At this point, the skirt portion 10 separates from the straight water outlet 3b, and from then on, the amount of water flowing increases rapidly, and becomes fully open in about four rotations. During this time, the flow rate is almost completely proportional to the opening degree of the stopper, and the flow rate can be adjusted almost perfectly from beginning to end. On the other hand, the conventional valve becomes open after about 0.5 rotations, and the lower limit of the flow rate starts from about 3 times or more. In addition, a large amount of water flows even though the opening degree of the tap is small, and the opening degree of the tap and the flow rate may not be proportional to each other, making it difficult to make fine adjustments in flow rate adjustment. In the present invention, the fluid that flows out when the valve is in the open state flows out with almost no effect on the valve body 5 from the initial stage of opening until the valve is fully opened, whereas in the conventional example, the fluid flows out when the valve is in the open state. In this case, the valve body 5 is exposed to fluid from the initial opening to the full opening, and is often exposed to strong currents and worn out, especially when the valve is initially opened or when a small amount of water is flowing.

【Effect of the invention】

As explained above, the flow rate regulating valve according to the present invention includes a partition wall provided inside the valve body, a valve seat for providing a water passage in the partition wall, and a piece seal that engages and disengages from the water passage by operating a handle. The water inlet of the valve seat has a tapered upper part and a straight lower part, and the piece packing includes a valve body that abuts the tapered surface and a skirt part that fits into the straight part. However, by providing a plurality of slits in the vertical direction in the skirt portion, the fluid flows out through the slits from the initial open state by operating the handle to the fully open state, and the flow rate decreases during that time. Since the adjustment is proportional to the operation of the handle and fine adjustment is possible, and the valve body is hardly affected by the outflow of fluid,
It has the excellent effect of being able to be used for a long time without wear of the valve body.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a flow rate regulating valve according to a first embodiment of the present invention, and FIG. 2 is a sectional view showing only the main parts of the valve.
FIG. 3 is a cross-sectional view showing only the main parts of the second embodiment, and FIG. 4 is a graph showing the open state and liquid outflow amount of the valve of the present invention and the conventional example from the initial opening to full opening. , FIG. 5 is a sectional view of a conventional valve, and FIG. 6 is a sectional view showing only the main parts of the same valve. 1...Valve body 1a...-Next side flow path 1
b... Secondary flow path 2... Partition wall 3...
...Valve seat 3a...Tipper surface water outlet 3b-...Straight water outlet 4...Komapatsukin 5...Valve body 6...
...Axis 7 ...Spindle 8 ...Lid member 9 ...Handle 10 ...Skirt portion 11 ...Slit patent applicant Maezawa Kyuso Kogyo Co., Ltd. Company Figure 1 Figure 4 Guide (Track list, (L/m“ゝ

Claims (2)

[Claims] (1) A valve that includes a partition wall provided inside a valve body, a valve seat having a water port provided in the partition wall, and a piece packing that engages and disengages from the water port by operating a handle, the valve seat The water inlet has a tapered upper part and a straight lower part, and the piece packing has a valve body that comes into contact with the tapered surface and a skirt part that fits into the straight part, and the skirt part has a plurality of slits. A flow rate adjustment valve characterized by being installed vertically. (2) The flow rate regulating valve according to claim (1), wherein the slit is formed in the shape of a chevron or rectangular groove.