JPS6145254Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an antifreeze faucet having a valve seat.

Conventionally, in antifreeze faucets, etc., valve mechanisms that use springs to shut off water against water pressure inevitably have a complicated structure, resulting in high costs, and when water pressure is high, the spring is pushed up and the main valve is closed. There was a defect in which the pipe opened and water leaked. Therefore, in order to eliminate these defects, some valves are equipped with one more annular gasket on the main valve, and are opened and closed depending on the mutual positional relationship of these annular gaskets. (For example, Utility Model Publication No. 44-19499) However, although the defect in the spring valve was certainly removed with the above valve, it caused compression of the water on the upstream side during the transition to closing, and as a result, the upstream piping equipment There is a defect that the main valve is damaged or the handle becomes heavy.Furthermore, when the main valve moves in the closing direction, the annular gasket protrudes due to pressure water, which causes blowout, which also leads to water leakage. Ta.

The present invention eliminates all of the above defects.
The object of the present invention is to provide a water stop valve device for an antifreeze faucet with a simple structure.

The basic structure of this device is that an inlet, an outlet, and a drain are arranged in order from the bottom, and a cylinder that extends above and below the drain, and a valve seat and a cylinder above the valve seat are placed between the inlet and the outlet. A valve body formed concentrically with the main valve that reciprocates in the cylinder of the valve body, an annular gasket that fits in and leaves the cylinder that extends above and below the drain port, a piece gasket that sits on the valve seat and stops water, and By attaching a water control ring made of plastic with a diameter slightly larger than the cylinder above the valve seat and having a groove formed on the outer periphery, the ring can be tightly attached to and detached from the cylinder above the valve seat, and by lowering the main valve,
Before the annular gasket that was tightly attached to the lower cylinder of the drain port detaches and starts draining, the water control ring is inserted into the cylinder above the valve seat to control a small amount of water without compressing the water in the upstream piping. The water is allowed to escape from the groove on the outer periphery of the ring to the outlet side or the drain side. Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

FIG. 1 is a vertical cross-sectional view showing the open state of the present invention, where 1 is a valve body, which has an inlet 2, an outlet 3, and a drain 4 on the side in order from the bottom, and has a cylinder 5 inside. , 6, 7 and the lower end of the cylinder 7 are provided with a valve seat 8. Reference numeral 9 designates a main valve, which is equipped with two annular gaskets 10 and 11 on the outside, and below the annular gasket 11 is a water control ring 13 made of plastic and having a spiral groove 12 on the outside; A piece packing 14 is arranged below, and is attached to the main valve 9 with a ball holding pin 15. A water stop ball 16 is used to shut off water from the inlet 2 when the main valve 9 is pulled out to repair a gasket or the like.

The valve body 1 is connected to an upper mechanism (not shown) by a pipe 17, and the main valve 9 by a rod 18.

Next, the operating mode of the present invention will be explained.

In the open state shown in FIG. 1, the annular gasket 11 attached to the lower side of the main valve 9 is in close contact with the cylinder 6, so the water on the inlet 2 side does not flow out to the outlet 3. Downstream piping (drawing omitted)
flowing to. When the main valve 9 is lowered from this state, the water control ring 13 first tries to touch the cylinder 7. At this time, if a conventional product (for example, the previously cited Utility Model Publication No. 44-19499) that does not use a water control ring but uses an annular packing, the narrow gap between the cylinder and the outside of the annular packing can be quickly filled. Due to the pressure drop caused by the flowing water and the force pushing up the annular packing due to the water flowing around the bottom of the groove, the annular packing may completely come out of the groove, or even if it does not come off completely. If a part of the annular packing protruded from the groove and the main valve was lowered in that state, the annular packing was likely to be cut by the cylinder, a so-called blowout. Furthermore, even if blowout does not occur, from the time the annular packing is attached to the cylinder 7 until the valve is completely closed,
This attempts to compress the water in the upstream piping (not shown) connected to the inlet 2, causing the handle to become stiff or causing damage to the upstream piping joints.

However, in the present invention, instead of the annular packing, a water control ring 13 made of plastic, which is harder than rubber and has less elasticity, is used.
Even when entering the cylinder 7, the above-mentioned blowout does not occur at all, and even after entering the cylinder 7, the water control ring 13 has a slightly larger outer diameter than the cylinder 7 and has a crushing allowance. Therefore, most of the water on the inlet 2 side is blocked by the water control ring 13, but some of the water is blocked by the cylinder 7 and the spiral groove 12 provided on the outside of the water control ring 13. It tries to flow out to the outlet 3 side through the passage. In other words, it is possible to prevent water from being compressed in the upstream piping, so that the handle does not become stiff or the upstream piping joints are damaged. When the main valve 9 further descends from this state, the annular packing 11 begins to come off the cylinder 6, and when it is completely removed, the piece packing 14 is pressed against the valve seat 8, and the water from the inlet 2 completely cut off. In other words, the valve becomes completely closed.

At this time, the annular packing 10 is attached to the cylinder 5.
Since the water in the outflow side piping is in close contact with the drain port 4, all of the water in the outflow side pipe is discharged to the outside through the gap between the cylinder 6 and the main valve 9 without flowing out.

From the time the annular gasket 11 is removed from the cylinder 6 until the piece gasket 14 is seated on the valve seat 8, water from the inlet 2 flows out to the drain port 4, but the water control ring 13 is closed to prevent compression. This is a trace amount of water that has passed through the spiral groove 12, and does not pose any problem in practice. In any case, the amount of spiral groove 1
Since it is determined by the width, depth, pitch, etc. of 2, a uniform outflow amount can be easily obtained by injection molding or cutting. Further, it is not necessarily necessary to form a spiral groove, and one or several vertical grooves may be used. The material of the water control ring 13 is as follows:
It is preferable to use a material such as polyethylene that is relatively soft and does not have much elasticity, and it is convenient because there is no need to make the dimensional accuracy very precise.

As mentioned above, since there is no need to use springs in this invention, the structure is simple and low cost, and there is no risk of water leakage caused by the spring being pushed up under high pressure, and furthermore, there is no need for blowout. This anti-freeze water supply with a valve seat eliminates the risk of heavy handle operation and damage to piping equipment, as it prevents damage to the annular gasket and prevents water from being compressed in the upstream piping. It is possible to provide a water shutoff valve device for a faucet.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the opened state of the present invention. 1...Valve body, 2...Inflow port, 3...Outflow port, 4
... Drain port, 5, 6, 7 ... Cylinder, 8 ... Valve seat, 9 ... Main valve, 10, 11 ... Annular packing,
13... Water control ring, 14... Koma Patsukin.

Claims (1)

[Scope of utility model registration request] An inlet, an outlet, and a drain are arranged in order from the bottom, and a cylinder extending above and below the drain, a valve seat and a cylinder above the valve seat are formed concentrically with the cylinder between the inlet and the outlet. a valve body that reciprocates in the cylinder of the valve body, an annular gasket that fits in and leaves the cylinder that extends above and below the drain port, a piece gasket that sits on the valve seat to stop water, and a cylinder that is slightly above the valve seat. 1. A water stop valve device for an antifreeze faucet, characterized in that the water stop valve device is made of plastic having a large diameter and has a groove formed on its outer circumference, and is equipped with a water control ring that comes into close contact with and detaches from the cylinder above the valve seat.