JPH10110848A - Air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure water stop property while miniaturizing an air valve. SOLUTION: A float valve element 7 is composed of a float body 7a and a lever valve element 7b, and magnets 17, 18 attracted to each other are arranged at the lower face center part of a floating valve element 5 and the upper face center part of the lever valve element 7b. A small air hole 6 can thereby be opened rapidly by the lever valve element 7b by the principle of a lever, and the air hole 6 is closed rapidly and positively with the lever valve element 7b by attracting force of the magnets 17, 18. As a result, water stop property can be ensured, and the float body 7a and an air valve can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air valve provided in, for example, water and sewage.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional air valve of this type. The guide frame 1a is arranged concentrically with the large air hole 3 in a valve box 1 in which a communication hole 2 communicating with a pipe such as water supply and sewage is formed at a lower portion and a large air hole 3 is formed at an upper portion. A floating valve element 5 for opening and closing the large air hole 3 and a float valve element 7 for opening and closing the small air hole 6 formed at the center of the floating valve element 5 are provided in the guide frame 1a. Are provided so as to be able to move up and down.

[0003] According to the above configuration, the exhaust during charging and the supply of air during drainage can be performed in a state where the floating valve element 5 and the float valve element 7 are both lowered and the large air hole 3 is opened. .
In addition, when water is passed, air accumulates in the valve box 1 in a state where the large air hole 3 is closed by the floating valve element 5 and the small air hole 6 is closed by the float valve element 7 as shown by a virtual line. When the water level in the valve box 1 is lowered and the weight of the float valve body 7 is larger than the force for pushing up the float valve body 7, the float valve body 7 is lowered and the small air hole valve seat 6a is lowered.
, Whereby the inside of the valve box 1 communicates with the outside air through the small air holes 6, the floating valve body 5 descends, and the air accumulated in the valve box 1 is automatically discharged (exhausted under pressure). After the air in the valve box 1 is discharged, the float valve 7 rises as the water level in the valve box 1 rises, and the small air hole 6 is closed by the float valve 7 and the floating valve 5 Is pushed up, and the large air hole 3 is closed by the floating valve element 5.

[0004]

However, in the above-described air valve, since the minimum hole diameter of the small air hole 6 and the specific gravity of the float valve body 7 are determined by the standard, the size and weight of the air valve are reduced. Difficult to meet market needs. That is, when the float valve 7 is made smaller for the purpose of reducing the size of the air valve, the weight of the float valve 7 becomes lighter,
Evacuation under pressure becomes impossible. Further, since only a small buoyancy can be obtained, the pressure contact with the small air hole valve seat 6a becomes uncertain, and the reliability of the water stopping property cannot be set.

An object of the present invention is to provide an air valve capable of evacuating under pressure and securing water stoppage while arranging a small float valve body. is there.

[0006]

In order to solve the above-mentioned problems, an air valve according to a first aspect of the present invention is provided so as to be concentric with a large air hole in a valve box having a large air hole formed in an upper portion thereof. A frame body is arranged, and a floating valve body for opening and closing a large air hole and a float valve body for opening and closing a small air hole formed in a central portion of the floating valve body can be raised and lowered in the guide frame body. In the air valve provided in the above, the float valve body is a float body that rises and falls according to a change in water level in the valve box, and a valve that is pivotally mounted on an upper part of the float body and abuts and separates from a small air hole valve seat. A seat contact surface is constituted by a lever valve body formed on the upper surface, and a magnet is arranged around a small air hole on the lower surface of the floating valve body, corresponding to the magnet of the floating valve body on the upper surface of the lever valve body. A magnet having a polarity attracting the magnet of the floating valve body is disposed at a position where the magnet is located.

In the air valve according to the second aspect of the present invention, a magnet is further arranged circumferentially on a peripheral portion of a lower surface of the floating valve body, and the magnet corresponds to the magnet of the floating valve body on the upper surface of the lever valve body. A magnet having a polarity that repels the magnet of the floating valve body is disposed at a position.

According to the configuration of the first aspect, the exhaust at the time of filling water and the supply of air at the time of drainage can be performed in the same manner as in the prior art. When water is passed, the large air hole is closed by the floating valve body and the small air hole is closed by the lever valve body. When air accumulates in the valve box and the water level in the valve box falls, the water level is lowered. Accordingly, the float main body descends, and accordingly, the lever valve body moves downward by the principle of leverage with the contact point with the floating valve body as a fulcrum, and the small air hole is quickly opened. Thereby, the inside of the valve box communicates with the outside air through the small air holes, the floating valve body descends, and the air accumulated in the valve box is automatically discharged (discharged under pressure). After the air in the valve box is discharged, the float body rises as the water level in the valve box rises. And the large air hole is closed by the floating valve element.

At this time, the magnet on the lower surface of the floating valve body and the magnet on the upper surface of the lever valve body attract each other, so that the lever valve body quickly rises, and its valve seat contact surface comes into contact with the small air hole valve seat. The small air holes 6 are securely closed while being pressed against each other while being positioned. Therefore, even when the sealing surface of the small air hole valve seat 6a is uneven or when the pressure of the water flowing into the valve box is low, the water stoppage is ensured.

That is, by arranging the lever valve body and the magnet, the small air hole can be opened more quickly than the above-mentioned conventional type valve, and the waterproofness can be ensured.
The float body can be made smaller.

According to the second aspect of the present invention, when the lever valve body moves downward with the contact point with the floating valve body as a fulcrum as the float body descends, the magnet on the peripheral edge of the lower surface of the floating valve body is removed. Since the magnet at the peripheral edge of the upper surface of the lever valve body repels, the lever valve body quickly separates from the small air hole valve seat, and the small air hole is opened. Therefore, this also makes it possible to reduce the size of the float main body.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The air valve shown in FIGS. 1 to 4 has substantially the same configuration as the conventional one described with reference to FIG. 7, and has a communication hole 2 at the lower portion communicating with a pipe such as water and sewage.
The guide frame 1a is arranged concentrically with the large air hole 3 inside the valve box 1 in which the large air hole 3 is formed at the upper part, and the large air hole 3 is formed in the guide frame 1a. A floating valve element 5 for opening and closing and a float valve element 7 for opening and closing a small air hole 6 formed in the center of the floating valve element 5 are provided so as to be able to move up and down.

The guide frame 1a has a substantially cylindrical shape and has a lower portion curved so as to be able to hold the float valve 7 and a plurality of flow holes 1b through which water in the valve box freely enters and exits. Is formed.

The floating valve element 5 is formed in a substantially columnar shape having an outer diameter slightly smaller than the inner diameter of the guide frame 1a, and the projection 5a on the upper surface enters the large air hole 3 and The flat portion 5b around the periphery 5a is configured to contact the seat surface 3a around the large air hole 3.

The float valve 7 comprises a float body 7a and a lever valve 7b. Float body 7a
Is formed in a substantially cylindrical shape, and is raised and lowered according to a change in the water level in the valve box 1.

The lever valve body 7b is formed in a substantially circular shape in a plan view having substantially the same diameter as the float main body 7a, and is vertically moved via a pivot shaft 11 to a bearing portion 10 protruding from the outer periphery of the upper surface of the float main body 7a. A groove 12 is formed on the upper surface of the groove 12 so as to be freely rotatable in the small air hole valve seat 6a in parallel with the pivot shaft 11, and the center of the bottom of the groove 12 is small air. A valve seat contact surface 13 is provided which can be in contact with and separate from the hole valve seat 6a. The lower surface of the lever valve body 7b is formed in a concave spherical shape that is stably mounted on the float body 7a.
The floating valve body contact surface 16 formed on the upper surface on the distal end side of the concave groove 12 is a curved surface formed with a predetermined radius of curvature that allows continuous point contact with the lower surface of the floating valve body 5.

Further, as shown in FIGS. 2 and 3 (a) and 3 (b), the small air hole valve seat 6 on the lower surface of the floating valve body 5 is provided.
a, a magnet 17 is circumferentially disposed around the periphery of the lever valve body 7b, and a magnet 17 and a magnet 18 are disposed on both sides of the concave groove 12 on the upper surface of the lever valve body 7b.
And an arc-shaped magnet 19 corresponding to.

The magnet 17 is arranged so that the north pole is located downward, the magnet 18 is located so that the south pole is located downward, and the magnet 19 is arranged so that the south pole is located above. The magnets 18 are configured to repel each other.

Explaining the operation of the air valve described above, the exhaust at the time of filling water and the supply of air at the time of drainage can be performed in the same manner as in the prior art. At the time of water flow, the large air hole 3 is closed by the floating valve element 5 and, as shown in FIG.
With the small air hole 6 closed by the valve seat contact surface 13 of
When air accumulates in the valve box 1 and the water level in the valve box 1 drops,
As shown in FIG. 4 (b), the float main body 7a is lowered in accordance with the water level, and the lever valve 7b is moved downward in conjunction with that.

At this time, since the concave groove 12 which can be loosely fitted to the small air hole valve seat 6a is formed on the upper surface of the lever valve body 7b, the valve seat contact surface 13 in the concave groove 12 and the small air hole are formed. The contact point with the tip corner of the valve seat 6a is set as a fulcrum A1, and the lever valve body 7b
Moves downward by the principle of leverage, and then the curved floating valve body contact surface 16 comes into point contact with the lower surface of the floating valve body 5 sequentially and continuously in the direction of arrow a, and moves continuously. Since the lever valve body 7b moves down smoothly with the contact point as a fulcrum, and the descending length of the float body 7a is reduced, the response of the exhaust is improved. That is, the weight of the float main body 7a can be increased by the principle of leverage and act on the lever valve body 7b.

At this time, further, in the state shown in FIG. 4B, the magnet 18 on the lower peripheral edge of the floating valve element 5 and the magnet 19 on the upper surface of the lever valve element 7b repel each other.
b is quickly separated from the small air hole valve seat 6a.

Then, as shown in FIG. 4C, the lever valve body 7b is separated from the small air hole valve seat 6a, whereby the inside of the valve box 1 communicates with the outside air through the small air hole 6. Then, the floating valve body 5 descends, and the air accumulated in the valve box 1 is automatically discharged (discharged under pressure).

After the air in the valve box 1 is discharged in this way, the float body 7a rises as the water level in the valve box 1 rises, and the lever valve body 7b pivotally mounted on the upper part of the float body 7a The small air hole 6 is closed, and the floating valve element 5 is pushed up, so that the large air hole 3 is closed by the floating valve element 5.

At this time, the magnet 17 at the center of the lower surface of the floating valve element 5 and the magnet 18 on the upper surface of the lever valve element 7b attract each other, so that the lever valve element 7b rises quickly and comes into contact with its valve seat. The surface 13 is pressed against the small air hole valve seat 6a while being positioned, and the small air hole 6 is closed. Therefore, even when the sealing surface of the small air hole valve seat 6a is uneven or when the pressure of the water flowing into the valve box is low, the water is reliably stopped.

That is, the lever valve body 7b and the magnets 17,1
By arranging the valves 8 and 19, the small air holes 6 can be opened more quickly than the above-mentioned conventional type valve, the water stoppage can be secured, and the float main body can be made smaller.

The magnets 17, 18, and 19 may be formed by disposing a ring-shaped or divided magnet on the lower surface of the floating valve body 5 or the upper surface of the lever valve body 7b evenly along the circumferential direction. 5 and the arrangement as shown in FIG. 6 are also possible.

In the above description, the center of the bottom surface of the concave groove 12 formed on the upper surface of the lever valve body 7b is connected to the small air hole valve seat 6
a, the valve seat contact surface 13 which can be contacted and separated,
Without forming, the central portion of the upper surface of the lever valve element 7b is directly in contact with or separated from the small air hole valve seat 6a.
Water stoppage can be ensured similarly to the above.

[0028]

As described above, according to the present invention, the small valve can be quickly opened by lowering the lever valve body by the principle of leverage by the weight of the float valve body, and the lever can be opened by the attractive force of the magnet. The air hole can be quickly and reliably closed by the valve body to secure the water stoppage, whereby the size of the float main body and the size of the air valve can be reduced.

Also, the lever valve element can be quickly separated from the small air hole by the magnets disposed on the lower peripheral edge of the floating valve element and the upper peripheral edge of the lever valve element. The size of the main body and the size of the air valve can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an entire configuration of an air valve according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a main part of the air valve.

FIG. 3 is a plan view of a lever valve body and an idle valve body that constitute the air valve.

FIG. 4 is a longitudinal sectional view of a main part for explaining the operation of the air valve.

FIG. 5 is an enlarged vertical sectional view showing a main part of an air valve according to another embodiment.

FIG. 6 is an enlarged vertical sectional view showing a main part of an air valve according to still another embodiment.

FIG. 7 is a longitudinal sectional view of a conventional air valve.

[Explanation of symbols]

 1 Valve Box 1a Guide Frame 3 Large Air Hole 5 Floating Valve 6 Small Air Hole 6a Small Air Hole Valve Seat 7 Float Valve 7a Float Body 7b Lever Valve 17,18,19 Magnet

Claims (2)

[Claims] 1. A guide frame body is disposed concentrically with a large air hole in a valve box having a large air hole formed in an upper portion, and a floating valve body for opening and closing the large air hole is provided in the guide frame. A float valve for opening and closing a small air hole formed in a central portion of the floating valve body, the float valve body being provided so as to be able to move up and down according to a change in water level in the valve box. And a lever valve body which is pivotally attached to the upper part of the float body and has a valve seat contacting surface formed on the upper surface which comes into contact with and separates from the small air hole valve seat. An air valve, wherein a magnet is arranged around a small air hole, and a magnet having a polarity attracting the magnet of the floating valve body is arranged at a position corresponding to the magnet of the floating valve body on the upper surface of the lever valve body. . 2. A magnet which is circumferentially arranged on a peripheral portion of a lower surface of a floating valve body, and a polarity repelling the magnet of the floating valve body at a position corresponding to the magnet of the floating valve body on an upper surface of a lever valve body. 2. The air valve according to claim 1, wherein said magnet is disposed.