JPS6022124Y2 - intake valve - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an intake valve used in water pipes in cold regions.

In cold regions, anti-freeze faucets are used, and during the winter, the water in the pipes is drained outside the pipes to empty them to prevent tap water from freezing.

However, if the piping downstream from the antifreeze faucet is as shown in FIG. 1, water will remain in the piping even after the water has been drained and will freeze.

That is, in Fig. 1, when the anti-freeze hydrant A is operated to drain water, the water supplied from the water supply pipe is stopped by the anti-freeze hydrant A, and the water supplied from the water supply pipe is stopped at the anti-freeze hydrant A, and the water is removed from the pipe downstream of the anti-freeze water hydrant A. The water in B is drained out of the pipe from the drain port of antifreeze faucet A, and the inside of the pipe becomes empty.

In this case, since the faucet C was located at the end of the pipe, all of the water was not drained out and remained at the height formed by both ends of the pipe, causing a freezing accident.

Therefore, in the case of such piping, an intake valve as shown in FIGS. 2 and 3 is installed at the top of the piping to prevent residual water.

The conventional intake valve shown in FIGS. 2 and 3 has a connection port 2 with a pipe, and a valve body is arranged in a valve chamber 6 so that air is taken in through an intake passage 5 only when the pressure inside the pipe is lower than atmospheric pressure. It is hollowed out from the main body 1 which holds 3 inside.

A backing 4 is attached to the valve body 3 to provide good sealing.

In the example shown in FIG. 2, the valve body 3 is biased by a spring 8 so as to be lightly pressed against the valve seat 7, but in the example shown in FIG. 3, the intake port is closed by the weight of the valve body 3.

When the anti-freeze faucet A in Fig. 1 is operated to drain water, the valve body 3 in Figs. 2 and 3 of the intake valve normally installed at the top of the pipe B opens the intake port and greatly drains the inside of the pipe. Since the pressure is maintained, all the water in pipe B will be discharged.

However, with conventional intake valves, it is difficult to confirm whether or not the intake valve has actually operated, which makes them difficult to use.

The present invention was devised in view of the above-mentioned problem, and is designed to make it possible to confirm that the intake valve is operating by generating a sound.The gist of this invention is as follows.

It is installed in the middle of water piping, and only when the pressure inside the pipe is lower than atmospheric pressure, it opens the intake port based on the pressure difference with the atmosphere and maintains the inside of the pipe at atmospheric pressure. A part of the air intake passage, which is formed in a separate member and communicates with the air intake port and one side of which is open to the atmosphere, has a central part so that air vibrations occur when air flow into the pipe occurs. is provided with a cylindrical structure consisting of an air column formed by two plates with coaxial holes and a peripheral wall thereof. Explain.

FIGS. 4 and 5 show embodiments of the present invention, but the second
The same reference numerals are given to parts having the same functions as those in FIGS.

In the embodiment shown in FIG. 4, a connection port 2 connected to a pipe is connected to a main body member 1, a floating valve 10 is housed inside, and a valve seat 9 of the floating valve 10 is provided.
A supporting plate 10' is fixed to the main body member 1' to prevent the floating valve 10 from detaching from the main body. An intake passage 5 forming a valve seat 7 is provided and a main body member 1'' forming a valve chamber 6 is fixed to form the main body.

A valve body 3 biased by a spring 8 in the valve chamber 6 is pressed against a valve seat 7 of the intake port, and a backing 4 provided on the valve body 3 prevents water from flowing out from the intake passage 5 when no air is being taken in. There is.

Can-shaped structures 11' and 12' forming an air column by two plates 11.12 having a small hole 13.14 in the center are attached to the air-opening side of the air intake passage 5.

When water is being supplied into the pipe, the water in the pipe causes the floating valve 10 to sit on the valve seat 9 and form a water seal, and the valve element 3 is pushed upward by the spring 8 and the water pressure, causing the backing 4 to close to the valve seat 7. It is in close contact with the intake valve to prevent water from flowing out of the intake valve.

When the anti-freeze water faucet is operated during the winter to discharge the water in the pipe, the pressure inside the pipe becomes lower than atmospheric pressure, so the valve body 3 moves downward and the backing 4 separates from the valve seat 7, causing the floating valve to open. 10 is removed from the valve seat 9, and the atmosphere flows into the pipe from the intake passage 5, bringing the inside of the pipe into an atmospheric pressure state.

At this time, the two plates 11 of the cylindrical structures 11' and 12'
．． As air flows in through the small holes 13 and 14 of 12,
The flow causes vibrations in the air column surrounded by the plates 11, 12, producing sound.

This sound continues until almost all of the water in the pipe has been drained, so it can be easily confirmed whether the intake valve is operating normally.

The embodiment shown in FIG. 5 has a small hole 13 in the center in the middle of the intake passage 5.
, 14 with washers 15 .
16. A can-shaped structure fixed by 17 is arranged.

A main body member 1 having a connection port 2 with piping, a seat surface 7 of a backing 4 having an intake passage 5 and attached to the valve body 3 at the intake port portion, and forming a valve chamber 6 in which the valve body 3 is accommodated. The main body member 1' and the main body member 1'' having an intake passage 5' constitute an intake valve body, and the intake passages 5, 5' have a small hole 1 in the center.
3, 14 plate 11.12 washer 15.16
．． 17, a portion of the intake passage 5' of the main body member 1'' is enlarged so that they can be arranged at a distance from each other.The operation is as follows.

When water is supplied into the pipe and the pressure inside the pipe is higher than atmospheric pressure, the backing 4, which is fixed to the valve body 3 that seals the water in close contact with the seat surface 7, causes the pressure inside the pipe to drop below atmospheric pressure when water is drained. Therefore, atmospheric air is released downward from the seat surface 7 and is supplied into the pipe through the intake passages 5, 5', bringing the inside of the pipe into an atmospheric pressure state.

At this time, when the air flowing from the intake passage 5' to the intake passage 5 passes through the small holes 13.14 of the plate 11.12 having an appropriate interval in the cylindrical structure on the way, air vibration is caused, as shown in FIG. Similar to the embodiment described above, a sound is generated, and since this sound is generated when water is being drained, it can be confirmed at the same time whether the intake valve is operating normally.

In addition to the embodiments described above, the present invention is applicable to the shape and structure of the main body if the intake valve has a structure in which one end is open to the atmosphere and the intake port at the other end can be opened and closed by a valve body. It is applicable to any configuration of the valve body regardless of its shape or structure.

In addition, by appropriately selecting the interval between the plates 11 and 12 of the can-shaped structure, it is possible to generate sounds with different frequencies, and the size of the small holes 13 and 14 provided in the center,
Alternatively, the shape of the plates 11.12 in the small holes 13 and 14 may be made to have a sharp tip to make it easier to generate air vibrations, or the size, shape, material, etc. of the plates 11.12 may be changed. You are free to change the settings, such as to produce a different tone, but the gist of this invention is to form an air column surrounded by two plates in a part of the intake path, and to A small hole is provided in the intake valve, and any structure may be used as the intake valve.

As explained above, this invention has achieved something that was not possible before, in that when the intake valve operates, it makes a sound to confirm that air is being taken in. This has a great practical effect in that the user can use it with peace of mind. Moreover, because it uses sound waves, even if there is an obstacle in the way, it can be identified from a distance, so it is especially effective when automating the draining operation in a general household, for example. Become.

Furthermore, the present invention has the advantage that it can also be used with existing intake valves.

[Brief explanation of the drawing]

Fig. 1 is a line diagram showing an example of piping that requires an intake valve in a cold region, Figs. 2 and 3 are vertical cross-sectional views of conventionally implemented intake valves, and Figs. FIG. 3 is a longitudinal cross-sectional view showing an example of an intake valve. 1.1', 1''...Body member, 2...
Connection port, 3... Valve body, 5, 5'... Intake path, 7... Valve seat, 11.12... Plate, 13, 14・・・・・・Small hole.

Claims (1)

[Scope of utility model registration request] A movable valve body is installed in the middle of a water pipe, and only when the pressure inside the pipe becomes lower than atmospheric pressure, the intake port opens and air is taken in due to the pressure difference with the atmospheric pressure, keeping the inside of the pipe at atmospheric pressure. In an intake valve having an intake passage which is held in the body and is connected to the intake port provided in the main body or another member and has one side open to the atmosphere, air flows into the piping in a part of the intake passage. In order to generate air vibrations when air vibrations occur, a flute-shaped structure is installed in which two plates with coaxial holes are placed in the center so that an air column is formed between the plates. An intake valve featuring