JPH08170747A - Air valve and float pusher therefor - Google Patents

Abstract

PURPOSE: To discharge residual air in a piping by a large amount without generating damage accident such as deformation of a valve seat at the time of water communication by forming an engagement part on a guide cylinder for fitting a float pusher which prevents rising of the float. CONSTITUTION: In order to discharge a large amount of residual air in a piping under water communication state, a float pusher 18 is inserted from a large diameter air hole 2a to a guide cylindrical body 5 in a large diameter side float chamber 2 as indicated by a virtual line. Engagement projections 18b, 18b are fitted into circulation holes 5a, 5a. The float pusher 18 is pushed down in a horizontal direction, so that float pusher body 18a abuts an upper portion of a float 6. The float pusher 18 is then horizontally rotated for fitting the engagement projections 18b, 18b to engagement portions 17, 17. Even when level in a valve box 1 is lifted, the float 6 is prevented from lifting, and a large diameter air hole 2a is forcibly opened. The residual air in the piping can be discharged by a large amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air valve and a float pusher for an air valve capable of easily discharging a large amount of residual air in a pipe for water supply, agricultural water, etc.

[0002]

2. Description of the Related Art Conventionally, an example of an air valve is shown in FIG. This is called a double tap air valve for water supply, and a large diameter side float chamber 2 and a small diameter side float chamber 3 are formed in a valve box 1 connected to a water supply pipe (not shown). The lower part of the large-diameter side float chamber 2 is communicated with the inside of the pipe through a communication hole 4 formed in the center of the lower part of the valve box 1, and the upper end of the float chamber 2 is connected to the upper part of the valve box 1. Through a large-diameter air hole 2a with a valve seat 13 provided to the outside, in the large-diameter side float chamber 2, inside the draft cylinder 5 with a through-hole 5a arranged concentrically with the large-diameter air hole 2a. A float 6 for opening and closing the large-diameter air hole 2a is provided so as to be able to move up and down. Further, the lower part of the small-diameter side float chamber 3 is communicated with the communication hole 4, and the upper end of the float chamber 3 is connected with the valve box 1 Inside the float chamber 3 on the small diameter side, which is communicated with the outside through the small air hole 7a of the nozzle 7 attached to the upper part of the A float 9 for opening and closing the small air hole 7a is provided in a guide cylinder 8 with a through hole 8a arranged concentrically with the small air hole 7a so as to be able to move up and down, and further, at a valve seat 10 of the communication hole 4. Opposing valve body 1
1 is provided, and the male screw portion 12a formed on the outer peripheral surface of the valve shaft 12 connected to the valve body 11 is screwed into the nut 13 attached to the valve box 1. By rotating the valve shaft 12 in the forward and reverse directions, The valve body 11 can be brought into contact with and separated from the valve seat 10 to open and close the communication hole 4.

In the above structure, when the communication hole 4 is opened, water flows from the pipe into the valve box 1 to change the water level, and the floats 6 and 9 move up and down in conjunction therewith, and the large diameter side thereof. The float 6 in the float chamber 2 abuts and separates from the valve seat 13 to open and close the large-diameter air hole 2a, whereby rapid exhaust at the start of water supply and rapid intake at the stop of water supply can be performed. The float 9 in the small diameter side float chamber 3 abuts and separates from the nozzle 7 to open and close the small diameter air hole 7a,
As a result, it is possible to perform intake and exhaust when passing water.

[0004]

SUMMARY OF THE INVENTION In the above conventional configuration,
Although it is possible to exhaust air from the small-diameter air holes 7a when passing water, when the residual air in the pipe cannot be sufficiently exhausted only by the exhaustion, conventionally, as shown in the figure,
By inserting the rod member 15 into the large-diameter air hole 2a and hooking it on the valve seat 13, a gap is forcibly formed between the valve seat 13 and the float 6, and the residual air in the pipe is removed by the large-diameter air. Although a large amount can be discharged from the hole 2a, this has a problem that the valve member 13 is partially deformed by the rod member 15 and causes water leakage.

In view of the above problems, the present invention provides
An object of the present invention is to provide an air valve and a float pusher for an air valve capable of easily exhausting a large amount of residual air in a pipe without causing a damage accident such as deformation of a valve seat.

[0006]

In order to achieve the above object, the invention according to claim 1 is such that a lower portion penetrates a lower portion of the valve box in a valve box connected to a pipe for water supply, agricultural water, or the like. A float chamber is formed, which is communicated with the inside of the pipe through the communication hole, and the upper end portion of which is communicated with the outside through a large diameter air hole penetrating the upper portion of the valve box, and the air inside the float chamber. In an air valve in which a float for opening and closing the air hole is provided in a guide cylinder arranged concentrically with the hole so as to be able to move up and down,
The guide cylinder is characterized in that a locking portion for locking the float pusher for preventing the float from rising is formed.

According to a second aspect of the present invention, the inside of the valve box connected to a pipe for water supply, agricultural water, etc. is communicated with the inside of the valve box through a communication hole penetrating the lower part of the valve box. , A float chamber having an upper end portion communicating with the outside through a large-diameter air hole penetrating the upper part of the valve box, and the air inside the guide cylinder arranged concentrically with the air hole in the float chamber. A float pusher for blocking the rise of the float of an air valve provided to lift and lower a float for opening and closing a hole, the pusher being inserted into the float chamber from the large diameter air hole and engaging with the float. It is characterized in that it is provided with a device main body and an engagement projection part which is integrally provided at both ends of the pusher main body so as to engage with a locking part formed on the guide cylinder.

[0008]

In the above structure, when a large amount of residual air in the pipe is discharged during water flow, the float pusher is inserted into the guide cylinder in the float chamber through the large-diameter air hole, and the float pusher is engaged with the float. It may be locked in the locking portion of the guide cylinder in the combined state. As a result, even if the water level in the valve box rises, the rise of the float is prevented and the large-diameter air holes are forcibly opened, so that the large amount of residual air in the pipe can be easily exhausted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a double-ended air valve for water supply according to a first embodiment of the present invention, and as shown in FIG. Circulation hole 5
Horizontally grooved locking portion 1 from the lower side edge of a, 5a
7, 17 are formed. Since the configuration other than the above is almost the same as that of the conventional air valve shown in FIG. 7, the same reference numerals are given to the same portions and the description thereof will be omitted.

FIG. 3 shows a float pusher 18, which is made of a plate material made of metal or synthetic resin and has an arc-shaped float pusher main body 18a which is in contact with the upper portion of the float 6 in a front view and the float pusher. And an engaging projection portion 18b, 18b which is integrally projectingly provided at both ends of the container body 18a and engages with each of the locking portions 17, 17.
Its width h is smaller than the width H of the through hole 5a, and its length r
Is set to be larger than the outer diameter R of the case cylinder 5.

In the above structure, when a large amount of residual air in the pipe is discharged during passage of water, the float pusher 18 is moved from the large diameter air hole 2a to the large diameter side float chamber 2 as shown by the phantom line in FIG. Of the engaging projection 18
2b and 18b are fitted into the through holes 5a and 5a, and then, as shown in FIG.
As shown by the phantom line, the float pusher 18 is brought into a horizontal state and pushed down, so that the float pusher body 1
8a is brought into contact with the upper portion of the float 6, and then, as shown by the solid line in FIG. 2, the float pusher 18 is rotated in the horizontal direction so that the engaging projections 18b, 18b are fitted into the locking portions 17, 17. All that is required is that (solid line in FIG. 1). As a result, even if the water level in the valve box 1 rises, the rise of the float 6 is blocked and the large diameter air hole 2a is forcibly opened, so that a large amount of residual air in the pipe can be discharged.

FIG. 4 shows a quick air valve according to a second embodiment of the present invention. The schematic structure thereof will be described below.
A fitting cylinder body 2 with a through hole 25a arranged concentrically with a large diameter air hole 22a formed in the upper portion of the valve box 1 in the float chamber 22.
A float 26 and an oscillating valve body 27 are arranged in the container 5 so as to be able to move up and down, and a flow hole 25b is formed in a lower portion of the fitting cylinder body 25. In the configuration other than the above, the same parts as those of the air valve shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In the above structure, water flows into the valve box 1 from the pipe, and the float 26 and the swing valve body 27 in the float chamber 22 move up and down in association with the change of the water level, whereby the swing thereof. The valve body 27 abuts and separates from the valve seat 13 to open and close the large-diameter air hole 22a to perform rapid exhaust at the start of water supply and rapid intake after stop of water supply.
6 contacts and separates from the nozzle 7 to open and close the small air holes 7a,
It is designed to be able to intake and exhaust when passing water.

According to the present invention, as shown in FIG. 5, among the plurality of through holes 25a of the fitting cylinder 25, 4 are arranged at appropriate intervals.
A lateral groove-shaped engaging portion 17 is formed in the horizontal direction from the lower side edge of one of the circulation holes 25a.

FIG. 6 shows a float pusher 28, which is made of a plate material made of metal or synthetic resin. In this embodiment, two sets are used, and the float pusher 28 is brought into contact with the upper portion of the swing valve body 27 in a plan view. Arc-shaped float pusher body 28a
And the engaging projections 28b, 2 which are integrally provided on both ends of the float pusher body 28a and engage with the respective locking portions 17.
And 8b.

In the above structure, when a large amount of residual air in the pipe is discharged during passage of water, each float pusher 28 is provided in the float chamber 22 through the large-diameter air hole 22a as shown by the phantom line in FIG. Inserted into the fitting cylinder 25, the engaging protrusion 28
b and 28b are fitted into the flow holes 25a and 25a, and as shown in phantom lines in FIG. 5, each float pusher 28 is brought into a horizontal state and pushed down, so that the float pusher main body 28a is rocked. Next, as shown in the solid line in FIG. 5, each float pusher 28 is rotated in the horizontal direction so that the engaging projections 28b, 28b are fitted into the locking portions 17, 17. Just enough. As a result, even if the water level in the valve box 1 rises, the float 26 is prevented from rising and the large-diameter air holes 22a are forcibly opened, so that a large amount of residual air in the pipe can be easily exhausted. .

In both of the above-mentioned embodiments, the lateral groove-shaped engaging portion 17 is formed on the fitting cylindrical bodies 5 and 25, but the invention is not limited to this. In short, both engaging of the float pushers 18 and 28 are performed. It is sufficient that the protrusions 18b, 18b, 28b, 28b can be locked to the fitting cylinders 5, 25.

[0018]

According to the invention described in claim 1, by inserting the float pusher into the guide cylinder in the float chamber through the large-diameter air hole and locking the float pusher in the locking portion of the fitting cylinder, Even if the water level in the valve box rises, the float pusher prevents the float from rising and the large-diameter air holes are forcibly opened, so a large amount of residual air in the pipe can be easily exhausted, In this case, the performance of the air valve can be maintained at a high level without causing a damage accident such as deformation of the valve seat, and it is only necessary to form the locking portion on the guide cylinder of the existing air valve. Because it is good, the production cost is almost the same as before and it is economical.

According to the second aspect of the invention, the structure of the float pusher is simple and can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a double-ended air valve for water supply according to a first embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view of a float pusher used in the same air valve.

FIG. 4 is a vertical sectional view of a rapid air valve that is a second embodiment of the present invention.

5 is a view taken along the line BB of FIG.

FIG. 6 is a perspective view of a float pusher used in the air valve.

FIG. 7 is a vertical sectional view showing a conventional example.

[Explanation of reference symbols] 1 valve box 4 communication hole 2 float chamber 2a large diameter air hole 5 interlocking cylinder 6 float 17 locking part 18 float pusher 18a float pusher main body 18b engaging protrusion 22 float chamber 22a large diameter Air hole 25 Interlocking cylinder 26 Float 28 Float pusher 28a Float pusher body 28b Engagement protrusion

Claims (2)

[Claims] 1. A valve box connected to a pipe for water supply, agricultural water, etc., a lower part of which is communicated with the pipe through a communication hole penetrating the lower part of the valve box, and an upper end of which is a valve. A float chamber communicating with the outside through a large-diameter air hole penetrating the upper part of the box is formed, and for opening and closing the air hole in a guide cylinder arranged concentrically with the air hole in the float chamber. An air valve in which a float is vertically movable, wherein an engaging portion for engaging a float pusher that prevents the float from rising is formed in the guide cylinder. 2. In a valve box connected to a pipe for water supply, agricultural water, etc., a lower part is communicated with the pipe through a communication hole penetrating the lower part of the valve box, and an upper end part thereof is a valve. A float chamber communicating with the outside through a large-diameter air hole penetrating the upper part of the box is formed, and for opening and closing the air hole in a guide cylinder arranged concentrically with the air hole in the float chamber. A float pusher for blocking the rise of the float of an air valve provided to allow the float to move up and down, a pusher body inserted into the float chamber through the large diameter air hole and engaged with the float, and the pusher body. A float pusher for an air valve, comprising: an engaging protrusion that is integrally provided on both ends of the container body and that engages with a locking portion formed on the guide cylinder.