JPH1019152A - Intake and exhaust valves - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of accidents that water is blown off out of an exhaust port when draining is carried out in the cold district by letting an exhaust valve body be so constituted as to be normally separated from an exhaust valve seat in the suction and exhaust valve where a suction valve sucking atmosphere and an exhaust valve exhausting air within pipelines, are integrally combined with each other. SOLUTION: In a normal condition where a float 31 is floated up, and an exhaust valve seat 10 is blocked by an exhaust valve body 15 while being pressed by an exhaust spring 14, the water surface of a valve box 1 is lowered, and when the float 31 is lowered down, a lever plate 20 is rotated downward, and since the exhaust valve seat 15 is vertically lowered clown against the exhaust spring 14, air above the water surface is thereby exhausted out of an exhaust port 5. Next, when water within pipelines is drained with a draining plug operated in winter, a suction valve body 9 compresses a suction spring 8 by the difference in pressure so as to be separated from a suction valve seat 6, a water level is lowered while air is being sucked in from a suction port 4, the exhaust valve body 15 is also accordingly lowered, and water within the pipelines is quickly drained underground out of the draining port of the draining plug.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called intake / exhaust valve in which an intake valve for inhaling the atmosphere when the pressure in a pipe becomes a negative pressure and an exhaust valve for discharging air in the pipe are integrally formed.

[0002]

2. Description of the Related Art Conventionally, as this kind of intake / exhaust valve, there has been proposed an intake / exhaust valve which is mainly used in a cold region such as Japanese Utility Model Publication No. 59-42543 by the same applicant. When the float descends due to its own weight and exhausts, the exhaust valve body with the packing rotates downward with the exhaust valve seat as a fulcrum, so the valve opening is small and a sufficient exhaust volume cannot be obtained. was there. Further, the lever supported by the exhaust valve body for suspending the float freely rotates in the left-right direction, so that the float freezes while abutting on the inner wall of the valve box when draining water, and then water. There was a danger that the float would not rise when the spilled out and that water would continue to exit the outlet until the ice melted.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is to completely remove the defects of the above-mentioned known example, to secure a sufficient exhaust volume, and to freeze the exhaust port even when draining water in a cold region. The purpose is to eliminate accidents in which water spouts out of water.

[0004]

In order to achieve the above object, the present invention provides an exhaust valve body which moves up and down in the vertical direction by using an exhaust valve guide connected to the lower end of an upper lid of a valve box as a guide.
A supporting plate having a step portion having a diameter larger than that of the upper portion and having an arm portion and an L-shaped hanging portion reaching near the inner wall of the valve box between the step portion and the lower end of the exhaust valve guide; The lower end of the valve guide is used as a fulcrum, and the other end is mounted with a lever plate that swingably holds the float suspended from the other end, and the exhaust valve body is perpendicular to the exhaust valve seat using the exhaust valve guide as a guide. Sufficient displacement is obtained, and the support plate is restricted from moving left and right by the inner wall of the valve box. The left and right movement of the float is also restricted, and the danger of contact with the valve box can be eliminated.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An intake port and an exhaust port are separately formed on an upper lid, and are usually connected through a joint in consideration of a water leak.
It is connected to this conduit and led to the drain pipe, but when it does not matter which water leaks from it, it can be merged into one conduit and the intake valve side is not connected It is also possible to attach only the intake lid or not to pipe both.

In the intake valve, either the intake valve seat or the intake valve body is made of polytetrafluoroethylene resin (hereinafter referred to as Teflon), and its excellent non-adhesiveness is used and the pressure receiving area is reduced as much as possible. By increasing the pressure, the descending force of the valve due to the pressure difference is increased to prevent an accident that the valve is stuck and does not inhale while maintaining the closed state for a long time, but this is not necessarily the case.

An exhaust plug having an exhaust valve seat at the lower end is connected to the upper lid by an adjustable screw, and an appropriate gap is provided between the lower end of the exhaust valve body guide and the upper end of the support plate so that the rotational force of the lever plate can be smoothly increased. It is transmitted to the exhaust valve body, and can be easily adjusted with a screwdriver or the like from above the upper lid even after assembly, which is convenient. However, the exhaust valve seat is formed integrally with the upper lid, and the exhaust valve body or exhaust valve It can also be adjusted on the body guide side.

[0008] The lever is configured to suspend a float having a vertical hole at the center thereof via a suspension rod at an end opposite to the fulcrum, and fluctuation of the float due to a water hammer action or the like directly causes opening and closing of the exhaust valve body. Although it is difficult to interlock, this may be replaced with a hanging rod, for example, a chain or a string, or a margin is provided above and below the lever, so that the float and the float hanging rod are integrally formed You can also.

The float is made of a resin having a specific gravity of less than 1, such as polyethylene or polypropylene, and is less expensive than, for example, a metal hollow float, and does not break even when high pressure is generated due to freezing or the like. It has the advantage that. Further, the support plate and the lever are made by punching a thin stainless steel plate with a press and bending it, but this is not a limitation.

[0010]

Embodiments will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a valve box, which has a mounting port 2 at the lower end thereof, which is connected to the inside of the pipe, and has an upper lid 3 screwed to the upper end. An intake port 4 and an exhaust port 5 are provided on the upper lid 3, and an intake plug 7 having an intake valve seat 6 formed by attaching an O-ring to a lower end of the intake port 4 is screwed to the upstream side of the intake port 4. The intake valve body 9 made of Teflon closes the intake valve seat 6.

An exhaust valve seat 1 is provided at the lower end on the upstream side of the exhaust port 5.
0 is provided, and an exhaust plug 12 provided with a driver groove 11 at the upper end is adjustably threadedly connected. The exhaust plug 12 is pressed upward by an exhaust spring 14 engaged with an exhaust valve body guide 13 screwed to the lower end of the upper lid 3. The packing 16 of the exhaust valve body 15
The exhaust valve seat 10 is brought into close contact therewith.

The exhaust valve body 15 is provided at its lower end with a small diameter portion 17 and a step portion 18 having a larger diameter than that of the support plate 19 with a proper gap between the exhaust valve body guide 13 and the lower end portion. And, the lever 20 is attached below it. As shown in FIG. 2, the support plate 19 has arms 2 extended at both ends to near the inner wall of the valve box 1.
1, a groove portion 22 into which the small-diameter portion 17 fits, a hanging portion 23 bent in an L-shape, and the lever 20 has a larger diameter than the step portion 18 to the left as shown in FIG. D-shaped hole 24
With a large hole 25 in the center and a small hole 26 to the right,
5 and the small hole 26 are connected by a communication groove 27.

Reference numeral 28 denotes a hanging rod formed of a resin, having a hemispherical holding plate 29 at the upper end and a float base 3 at the lower end.
0 is provided. The holding board 29 has a size smaller than the large hole 25 of the lever plate 20 and larger than the small hole 26, and the center axis of the suspension rod 28 is formed to have a slightly larger diameter than the communication groove 27. Reference numeral 31 denotes a float in which a vertical hole 32 having a diameter larger than that of the holding plate 29 and smaller than that of the float base 30 is formed at the center of the inside, and is formed of resin having a specific gravity smaller than 1.

At the time of assembling, first, the float 31 is inserted from the upper end of the hanging rod 28, the holding plate 29 of the hanging rod is inserted into the large hole 25 of the lever plate 20, and the center axis is forcibly moved rightward. And is passed through the communication groove 27 and positioned at the small hole 26 portion. Therefore, the suspension rod 28 is prevented from entering the communication groove 27 in a natural state unless a special force is applied.

Thereafter, the D-shaped hole 24 of the lever 20 is inserted from the step 18 to the small-diameter portion 17 of the exhaust valve body 15, and a support plate 19 is further placed on the lever 20 from the groove 22 to the small-diameter portion 17. Then, the float 31 is swingably connected to the exhaust valve body 15. When the support plate 19 is fitted, the lever 2
Since the lever 20 can be moved rightward to the extent that the left end of the lever 0 does not contact, the support plate 19 is restricted from moving left and right by the arm 21. 20 does not separate from the exhaust valve body 15.

FIG. 1 shows that the float 31 floats and the exhaust spring 1
4 shows a normal state in which the exhaust valve body 15 is closed by the exhaust valve body 15 when the exhaust valve body 15 is closed. However, when air bubbles are generated in the pipe and enter the valve box 1, the water level decreases, As a result, the buoyancy decreases and the float 31 descends by its own weight, and the lower end contacts the float base 30 of the hanging rod 28, and the left end of the lever 20 is supported by the support plate 20 and the lower end of the exhaust valve guide 13. To rotate the lever 20 downward. As a result, the D-shaped hole 24 comes into contact with the step portion 18 and the exhaust spring 1
4, the exhaust valve body 15 descends vertically using the exhaust valve body guide 13 as a guide, and discharges air above the water surface from the exhaust port 5. For this reason, the water level rises, the float 31 floats, and the valve closes. Thereafter, the same operation is repeated to discharge air. At this time, the intake valve body 9 maintains the closed state due to the water pressure.

Next, when water is drained from the pipe by operating the water drain valve in winter, the intake valve body 9 compresses the intake spring 8 due to the pressure difference and separates from the intake valve seat 6. The water level drops while sucking air, and the exhaust valve 1
5 also descends, and the water in the pipe is quickly discharged into the ground from the drain port of the water drainage while taking in air from the exhaust port 5. At this time, since the lower end of the holding plate 29 of the hanging rod 28 is spherical, it slides between the holding plate 29 and the lever plate 20 and
And the float rod 28 is at a right angle so that the lower end of the float 31 does not contact the inner wall of the valve box 1.

Even when the float 31 is in its lowest position, the float 31 is not in contact with the inner wall of the valve box and the water level does not normally reach the lever 20. An accident in which water spouts from the mouth 5 can be effectively prevented. Further, the intake valve body 9 is also effective in preventing contamination of sewage when a negative pressure is generated in the piping due to water cutoff or the like.

[0019]

As described above, in the intake / exhaust valve of the present invention, the exhaust valve body is vertically separated from the exhaust valve seat, so that a large amount of exhaust can be obtained. Water spouts from the exhaust port while the float is iced on the inner wall of the valve box,
This has the effect that no accidents occur.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a normal state in one embodiment of the present invention.

FIG. 2 is a perspective view of a support plate of FIG. 1;

FIG. 3 is a plan view of the lever of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve box 2 Mounting port 3 Top lid 4 Inlet port 5 Exhaust port 10 Exhaust valve seat 12 Exhaust plug 13 Exhaust valve body guide 14 Exhaust spring 15 Exhaust valve body 18 Step 19 Support plate 20 Lever plate 21 Arm part 23 Hanging part 28 Hanging Hanging stick 31 float

Claims (1)

[Claims] 1. A top lid connected and fixed to an upper end of a valve box having a lower end portion having a mounting port conducting in a pipe, an intake valve seat communicating with the intake port and the intake port, and a communication with the exhaust port and the exhaust port. An intake valve body that forms an exhaust valve seat that closes and is held upward by an exhaust valve that closes the intake valve seat, and an exhaust spring that is locked to an exhaust valve guide connected to the lower end of the upper lid. In addition to having an exhaust valve body that moves up and down in the direction, the exhaust valve body forms a step with a larger diameter at the lower end, and between the step and the lower end of the exhaust valve guide, near the inner wall of the valve box. A support plate having a reaching arm portion and an L-shaped droop portion;
An intake / exhaust valve comprising a support plate and a lower end of an exhaust valve guide serving as a fulcrum, and a lever plate for swingably holding a float suspended from the other end.