JPS594208Y2 - rapid air valve - Google Patents

Description

[Detailed description of the invention] The present invention connects a floating valve element that opens and closes a large diameter air hole formed on the upper end side of the valve box to a float valve element so as to be able to move up and down relative to it within a limited range, and the floating valve element The present invention relates to a rapid air valve configured to open and close a small diameter air hole formed in the air by the float valve body.

This type of rapid air valve connects a floating valve body and a float valve body, and is intended to prevent the floating valve body from floating due to airflow during rapid exhaust by using the gravity of the float valve body. Conventionally, the configuration has been proposed, for example, as a "gas vent valve" (Japanese Utility Model Publication No. 55-126071), in which the dynamic pressure of the airflow acts on the downward surface of the floating valve body. Therefore, when the airflow is extremely high-speed or when the float valve body is relatively light, there is a drawback that floating of the floating valve body cannot be sufficiently prevented.

That is, in the conventional structure described above, as shown in FIG. 4, the floating valve body 12' is disposed so as to fit over the top of the float valve body 10'.
0' is discharged through the gas vent hole a provided on the upper side of the main body 4', the dynamic pressure of the air flow is directly applied to the lower surface of the floating valve body 12'. In some cases, the lid 6' would float and be pressed against the lid 6', making it impossible to expect the intended action.

The present invention has been developed in view of the above circumstances, and its purpose is to prevent the floating valve body from rising due to the dynamic pressure of the rapid air flow during rapid exhaust.

In order to achieve the above object, the rapid air valve according to the present invention has a floating valve body that opens and closes a large diameter air hole formed at the upper end of the valve box, connected to a float valve body so that it can move up and down relatively freely within a limited range. ,
The rapid air valve is configured such that a small diameter air hole formed in the floating valve body is opened and closed by the float valve body, wherein a concave portion opening upward is formed on the upper end side of the float valve body, and It is characterized in that a lower portion is disposed within the recess.

The following excellent effects have been achieved with the number of feature configurations mentioned above.

That is, since a recess is formed in the float valve body and the lower part of the floating valve body is inserted into the recess, the dynamic pressure of the airflow does not act at all or hardly on the downward surface of the floating valve body during rapid exhaust. For example, even if the airflow is extremely high-speed, or even if the float valve body is relatively light, the lifting force on the floating valve body can be reduced and the gravity of the float valve body can be reduced. By acting on the valve body, the accidental rise of the floating valve body can be extremely effectively suppressed, and rapid exhaust can be performed smoothly and satisfactorily.

Furthermore, the floating valve element makes it easy to maintain the attitude of the floating valve element, and the large diameter air hole can be reliably sealed.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a connector 2 is screwed onto the liquid transport pipe 1, etc., and a valve box 4 is connected to the cock 3, which is screwed onto the connector 2, so that its lower opening is connected to the liquid transport pipe 1, etc. An annular lid body 7 that is screwed together in a continuous manner to form a large-diameter air hole 5 and is provided with an annular elastic sheet 6 for the air hole 5, and a cap 8 that covers the large-diameter air hole 5 are attached to the valve body 4. Bolt 9a at the top end.

It is connected at 9b.

A protrusion 11a in which float valve bodies 10, which are formed by welding a valve body part 10b and a bottom part 10C to a cylindrical part 10a, are distributed and protruded in the circumferential direction on the upper and lower sides of the inner circumferential surface of the valve box 4, respectively.

11b, the floating valve body 12, which opens and closes the large-diameter air hole 5, is installed in the valve box 4 with its horizontal position and attitude determined by the float valve body 10, as shown in FIGS. 2 and 3. As shown in FIG. 2, the annular plate 13 is fitted onto both the valve bodies 10 and 12 and is movable up and down relative to the float valve body 10. The formed small-diameter air hole 14 is opened and closed by a float valve body 10.

That is, as the liquid level within the valve body 4 changes, the float valve body 10 and the floating valve body 12 are moved up and down, the floating valve body 12 opens and closes the large diameter air hole 5, and the float valve body 10 opens and closes the small diameter air hole. 14 so that rapid exhaust and trace exhaust are performed, and the idle valve body 1 during rapid exhaust.
2 rising is prevented by the float valve body 10.

The annular plate 13 is made of a flexible and shape-retaining material such as synthetic resin, and is made of a flexible and shape-retaining material such as synthetic resin.
If the floating valve body 12 and the float valve body 10 are artificially separated while the connection between the floating valve body 12 and the float valve body 10 is reliably performed,
It is configured so that it is detached from the float valve element 1u together with the floating valve element 12 by bending, and is connected to the floating valve element 1u when approached.

Furthermore, the annular plate 13 is provided with ventilation holes 15 arranged in parallel in a manner distributed in the circumferential direction of the annular plate 13, so that the minute amount of exhaust can be effectively performed.

The lower part of the floating valve body 12 is disposed in an upwardly opening recess 16 formed on the upper end side of the float valve body 10,
It is configured to suppress lifting of the floating valve body 12 due to airflow during rapid exhaust.

In addition, the connection structure of the float valve body 10 and the floating valve body 12,
Alternatively, the specific structure for providing the float valve body 10 with the recess 16 can be freely changed.

[Brief explanation of drawings]

The drawings show an embodiment of the rapid air valve according to the present invention, in which Fig. 1 is an overall longitudinal cross-sectional view showing a rapid exhaust state, Fig. 2 is a longitudinal cross-sectional view of the main part in a fully closed state, and Fig. 3 is a small amount evacuation state. FIG. 4 is a vertical cross-sectional view of a main part showing a conventional example. 4... Valve box, 5... Large diameter air hole, 10
...Float valve body, 12...Floating valve body, 14...Small diameter air hole, 16...Concave portion.

Claims (1)

[Scope of utility model registration request] A floating valve body 12 that opens and closes a large diameter air hole 5 formed on the upper end side of the valve body 4 is connected to a float valve body 10 so as to be relatively movable up and down within a limited range, and a small diameter air hole formed in the floating valve body 12 14 is a rapid air valve configured to be opened and closed by the float valve body 10, in which a recess 16 with an upward opening is formed on the upper end side of the float valve body 10, and a lower part of the floating valve body 12 is connected to the recess 16. A rapid air valve characterized by being disposed within.