JP2003139260A - Eccentric air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a eccentric air valve improved in rust preventing effect by constituting a cover means with a fist cover member and a second cover member. SOLUTION: The eccentric air valve is provided with: a valve box 1 connected in the pipeline of a liquid feed pipe and forming a liquid accepting chamber 2 accepting the fed liquid in the pipeline; a cover means 5 comprising a first and a second cover members arranged in the valve box having a large air hole 3 in the central part and a small air hole 4 in the eccentric position from the central part; a float valve element 6 arranged to be vertically movable in the axial direction in the valve box, floated to close the small air hole by buoyancy when water is filled in the valve box, and dropped when no water is filled in the valve box; and a idle valve element 7 floated together with the float valve element to close the large air hole of the cover means when water is filled in the valve box. When no water is filled in the valve box and the float valve element is dropped, the large air hole and the small air hole of the cover means are opened to discharge the retained water in the valve box. The eccentric air valve is provided with a small air hole seat mechanism 8 in the small air hole side of the second cover member side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a mechanism for performing a large amount of suction into the valve box when the internal pressure of the liquid supply valve box falls below atmospheric pressure, and the inside of the valve box is maintained even when the internal pressure of the valve box is applied. The present invention relates to an air valve that automatically operates to exhaust accumulated air accumulated in a valve, and particularly relates to a large air hole provided at the center of the lid means with respect to the valve box and a small air hole provided at an eccentric position of the lid means. And an eccentric type air valve having

[0002]

BACKGROUND OF THE INVENTION As is well known, conventional eccentric air valves are
As shown in FIGS. 5 and 6, a liquid receiving chamber 32 that is connected to the conduit of the liquid supply pipe and receives the supply liquid in the conduit.
And a valve box 31 that forms the valve box 31 and an upper opening side 31 of the valve box 31.
a lid means 35 attached to a, having a large air hole 33 at the center and a small air hole 34 at an eccentric position from the center;
A float valve body 36 that is arranged so as to be vertically movable in the valve box 31 and floats by buoyancy when the valve box is filled with water to close the small air holes 34; A floating valve body 37 that floats up together with the float valve body 36 to fill the large air holes 33 in the lid means 35 when the valve box is filled with water, and the lid is provided when the float valve body falls due to an anhydrous state in the valve box. The large air hole 33 and the small air hole 34 in the means 35 are opened to exhaust the accumulated air in the valve box.

In this conventional typical eccentric type air valve, the lid means 35 is composed of one lid. In this conventional eccentric type air valve, a small air hole valve seat 38 for the small air hole 34 is attached to a lid means 35 constituted by a single lid body. The mounting screw member 39 is required. When this mounting screw member 39 is used, it is necessary to provide a screw hole 40 in the lid means 35. The lid means 35 is
Usually, it is made of cast iron, and its surface is coated with rust preventive coating. However, the anti-rust coating cannot be applied to the mounting screw holes for the small air holes 34, and the bare metal cast iron remains exposed at that portion, which reduces the anti-corrosion effect. Had a point.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to have a mechanism for performing a large intake of air into the valve box when the liquid supply valve box internal pressure falls below atmospheric pressure, and the valve box internal pressure is added. In an eccentric type air valve that automatically operates to exhaust accumulated air accumulated in the valve box even in a state, it is an object of the present invention to solve the above-mentioned conventional problems and drawbacks. In order to enhance the rust preventive effect, the cover means is composed of a first cover member and a second cover member, and the rust preventive effect is obtained without performing screw hole processing on the first cover member located outside. In addition, the small air hole valve seat can be easily attached to and detached from the second lid member located inside, so that the number of processing steps and the number of parts can be reduced. Is intended to provide an eccentric air valve

[0005]

To achieve the above object, the present invention specifically has a mechanism for performing a large amount of intake into the valve box when the internal pressure of the liquid supply valve box falls below atmospheric pressure. A valve device that automatically operates to exhaust accumulated air accumulated in the valve box even when the pressure inside the valve box is applied, and is connected to the pipe line of the liquid supply pipe, A valve box that forms a liquid receiving chamber that receives a supply liquid, and a first and a first valve that are attached to the upper opening side of the valve box and that include a large air hole in the center and a small air hole in an eccentric position from the center. The lid means is composed of two lid members and is arranged so as to be vertically movable in the valve box in the axial direction. When the valve box is filled with water, it floats by buoyancy to close the small air holes, and when the valve box is dry, it drops. Float valve body and the float when the valve box is filled with water A floating valve body that floats up with the body to close the large air hole in the lid means, and opens the large air hole and the small air hole in the lid means when the float valve body falls due to an anhydrous state in the valve box. An eccentric type air valve for exhausting staying air in a box, comprising a small air hole valve seat mechanism on the small air hole side of the second lid member side. .

Further, according to the present invention, the small air hole valve seat mechanism includes an eccentricity including a small air hole valve seat body that can be airtightly mounted in a valve seat hole provided in the second lid member. It constitutes a mold air valve.

Still further, according to the present invention, the small air hole valve seat body has an upper large diameter portion and a lower small diameter portion via a step, and the valve seat provided on the second lid member. After being inserted into the hole, it is pressed and fixed by the first lid member to form an eccentric type air valve assembled in a water-sealed state.

Furthermore, the present invention also constitutes an eccentric type air valve in which the second lid member and the float valve body guide are integrally formed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an eccentric type air valve according to the present invention will be described in detail with reference to specific embodiments shown in the drawings (FIGS. 1 to 4). FIG. 1 shows a concrete first embodiment of the eccentric type air valve according to the present invention, and is a schematic vertical cross-sectional view showing a mode in which the inside of the valve box is in an anhydrous state. FIG. 2 shows a second specific example of the eccentric type air valve according to the present invention, and is a schematic vertical cross-sectional view showing a mode in which the inside of the valve box is in an anhydrous state.

On the other hand, FIG. 3 shows an example of the operating mode of the eccentric type air valve according to the present invention.
A is a schematic vertical cross-sectional view showing a large amount of exhausted state in the valve box without water, FIG. 3B is a schematic vertical cross-sectional view showing a state in which the valve box is full of water, and FIG. It is a schematic longitudinal cross-sectional view showing a small amount exhausted state under pressure. Furthermore, FIG. 4 is a view for explaining an assembled state of the eccentric type air valve according to the present invention, and FIG. 4A shows an assembled state of the eccentric type air valve. FIG. 4B is a schematic perspective view showing a part of the air valve in a broken manner, and FIG. 4B is a schematic perspective view showing the constituent members of the eccentric type air valve that are disassembled in the axial direction and arranged in the vertical direction along the axis. It is a partially broken perspective view.

First, the basic structure of the eccentric type air valve according to the present invention will be described in detail with reference to FIGS. 1, 2 and 3. The eccentric type air valve AB according to the present invention has a mechanism for inhaling a large amount into the valve box when the internal pressure of the liquid supply valve box drops below atmospheric pressure, and the internal pressure of the valve box is increased even when the internal pressure of the valve box is applied. It is a valve device that automatically operates to exhaust the accumulated air accumulated in. The eccentric type air valve AB according to the present invention includes, as main constituent members, a valve box 1, a lid means 5 including a first lid member 5A and a second lid member 5B, a float valve element 6, and a floating valve element 7. It consists of including.

The valve box 1 in the eccentric type air valve AB
Has an open upper end 1a and a lower end 1b, and a lower end 1b
The liquid receiving chamber 2 for receiving the supply liquid W in the conduit is connected to the conduit of the liquid supply pipe through the lower end opening f of the liquid receiving chamber 2 so as to communicate with the upper end opening and the lower end opening. It consists of what forms. The float valve guide 10 is provided on the inner wall of the liquid receiving chamber 2 of the valve box 1.
And a pedestal 11 for receiving the lower end of the float valve body 6.

On the other hand, the lid means 5 is an important component in the present invention, and is constituted by a first lid member 5A and a second lid member 5B. The lid means 5
Is attached to the upper opening 1a side of the valve box 1 and has a large air hole 3 in the center and a small air hole 4 at an eccentric position from the center. More specifically, the large air hole 3 includes a large air hole 3A provided in the first lid member 5A and a large air hole 3B provided in the second lid member 5B. The small air holes 4 include small air holes 4A provided in the first lid member 5A and small air holes 4B provided in the second lid member 5B.

Further, an important point in the present invention is that the small air hole valve seat mechanism 12 is provided on the side of the small air hole 4B on the side of the second lid member 5B. The small air valve seat mechanism 1
2 includes a small air hole valve seat body 8 which can be airtightly mounted in the valve seat hole 13 provided in the second lid member 5B. The small air hole valve seat body 8 is configured to have an upper large diameter portion 8a and a lower small diameter portion 8b via a step, and after being inserted into the valve seat hole 13 provided in the second lid member, It is pressed and fixed by the first lid member 5A and assembled in a water-sealed state. The second lid member 5B includes a sealing material 14 and is combined with the valve box 1 in a water-sealed state.

On the other hand, the float valve body 6 is flattened in the axial direction, opens toward the upper side, and a floating valve that accommodates the floating valve body 7 in the inside communicating with the opening so that the float valve body 7 can freely move in and out. The body accommodating chamber 17 is formed. Further, the float valve body 6 can seal the lower end opening of the small air hole valve seat body 8 by the top surface 6a thereof when rising. The upper limit movement of the float valve body 6 is limited by the upper limit stopper 15.

Next, the floating valve body 7 can move up and down in the floating valve body accommodating chamber 17 of the float valve body 6, and the top surface 7a of the floating valve body 7 serves as a large air valve seat O.
A ring 16 is attached. Therefore, the floating valve body 7 can close the large air hole 3 in the lid means 5 when rising.

Regarding the operation mode of the eccentric type air valve AB having the above structure, FIG. 3A [mode in anhydrous state], FIG. 3B [mode in filled state] and FIG. 3C [mode in exhausted state under pressure] I will explain based on. First, FIG. 3A shows an embodiment in an anhydrous state, and the eccentric type air valve AB is shown.
There is no water W in the liquid receiving chamber 2 of the valve box 1 in FIG. Therefore, buoyancy does not act on the float valve element 6, and the pedestal 1
It is in a state of being dropped and supported on 1. In this case, the floating valve body 7 in the float valve body 6 is also supported at the drop position. Therefore, the large air holes 3 in the lid means 5
The small air holes 4 are both open, and when the pipe is filled with water, a large amount of air in the pipe can be discharged from the large air holes 3.

On the other hand, FIG. 3B shows a state in which the water is filled (filled), and the liquid W is filled in the liquid receiving chamber 2 of the valve box 1 in the eccentric type air valve AB. There is.
Therefore, the float valve body 6 receives the buoyancy and is guided to the float valve body guide 10 to float to the uppermost end, and the floating valve body 7 is also guided to the floating valve body accommodating chamber 17 to receive the buoyancy and floats to the uppermost end. ing. In this case, the small air hole 4B is sealed by the contact between the float valve body 6 and the small air hole valve seat 8, and the O-ring 16 provided on the top surface 7a of the floating valve body 7 is attached to the second lid. It is understood that the large air holes 3 are sealed by contacting the lower surface of the member 5B, and the eccentric type air valve AB is fully closed.

From the state of the full state shown in FIG. 3B, for example, when the air contained in the water in the pipeline accumulates inside the eccentric type air valve AB, the water level in the valve box lowers. However, the float valve body 6 is tilted as shown in FIG. 3C in the pressurized state of the valve box due to the decrease in the water level, the small air holes are opened, and the accumulated air accumulated in the valve box is transferred to the eccentric type air. The gas is exhausted outside the valve AB.

[0020]

According to the eccentric type air valve of the present invention having the above construction, the lid means for the valve box is constituted by the first and second lid members, and the second lid member located inside is constituted. On the other hand, by combining the small air hole valve seat mechanism, the rust prevention effect is enhanced, and the small air hole valve seat can be easily attached to and detached from the second lid member located inside. It can be said that it can be assembled as described above, and it can be said to be extremely effective in terms of obtaining an eccentric type air valve in which the number of processing steps and the number of parts are reduced.

[Brief description of drawings]

FIG. 1 shows a specific first embodiment of the eccentric type air valve according to the present invention, and is a schematic vertical cross-sectional view showing a mode in which the inside of the valve box is in an anhydrous state. .

FIG. 2 shows a specific second embodiment of the eccentric type air valve according to the present invention, and is a schematic vertical cross-sectional view showing a mode in which the inside of the valve box is in an anhydrous state. .

FIG. 3 shows an example of an operation mode of an eccentric type air valve according to the present invention, and FIG. 3A is a schematic vertical cross-sectional view showing a large amount exhaust state in a waterless state of a valve box. FIG. 3B is a schematic vertical cross-sectional view showing a state in which the valve box is full of water, and FIG. 3C is a schematic vertical cross-sectional view showing a small amount exhaust state under pressure in the valve box.

FIG. 4 is a view for explaining an assembled state of the eccentric type air valve according to the present invention, and FIG. 4A shows an assembled state of the eccentric type air valve. FIG. 4B is a schematic perspective view showing a partially broken type air valve, and FIG. 4B is a schematic perspective view showing the constituent members of the eccentric type air valve that are disassembled in the axial direction and arranged in the vertical direction along the axis. It is a partially broken perspective view.

FIG. 5 is a schematic longitudinal sectional view showing a first example of a conventional typical eccentric type air valve.

FIG. 6 is a schematic vertical cross-sectional view showing a first example of a conventional typical eccentric type air valve.

[Explanation of symbols]

AB eccentric type air valve 1 valve box 2 Liquid receiving room 3 large air holes 4 small air holes 5 lid means 5A First lid member 5B Second lid member 6 float valve body 7 Floating valve 8 small air valve seat 10 Float valve guide 11 pedestal 12 Small air valve seat mechanism 13 valve seat hole 15 Upper limit stopper 16 O-ring

Continued front page    F term (reference) 3H055 AA01 AA22 BA12 BB02 BB03                       BC05 CC02 CC21 DD05 DD22                       DD23 DD27 GG04 GG22 GG27                       HH01 HH08 JJ03 JJ04 JJ05                       JJ08 JJ11

Claims (4)

[Claims] 1. A mechanism for sucking a large amount of air into the valve box when the internal pressure of the liquid supply valve box falls below the atmospheric pressure, and retains accumulated air in the valve box even when the internal pressure of the valve box is applied. A valve device which is automatically operated to evacuate and which is connected to a conduit of a liquid supply pipe and forms a liquid receiving chamber for receiving the supply liquid in the conduit, and an upper opening side of the valve casing. And a lid means including first and second lid members each having a large air hole in the center and a small air hole at an eccentric position from the center, and can be vertically moved in the valve box in the axial direction. And float valve body that floats by buoyancy when the valve box is filled with water and closes the small air holes, and drops when the valve box is dry, and floats with the float valve element when the valve box is filled with water. A floating valve body for closing a large air hole in the lid means, When the float valve body is dropped due to an anhydrous state in the valve box, the large air holes and the small air holes in the lid means are opened to exhaust the accumulated air in the valve box,
An eccentric type air valve, wherein a small air hole valve seat mechanism is provided on the small air hole side of the second lid member side. 2. The small air hole valve seat mechanism comprises a small air hole valve seat body that can be airtightly mounted in a valve seat hole provided in the second lid member. The eccentric type air valve according to claim 1. 3. The small air hole valve seat body comprises an upper large diameter portion and a lower small diameter portion via a step, and after being inserted into a valve seat hole provided in the second lid member. The eccentric type air valve according to claim 1 or 2, wherein the eccentric type air valve is pressed and fixed by the first lid member and assembled in a water-sealed state. 4. The eccentric type air valve according to claim 1, wherein the second lid member and the float valve body guide are integrally formed.