JPS60535Y2 - Intake and exhaust valve device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an intake and exhaust valve device having a novel structural difference.

Traditionally, in the construction of water mains, replacement, and other works,
Float-type intake and exhaust valves are widely used to exhaust the air inside the pipe when water is passed through the main pipe after work is completed.

Although these intake and exhaust valves have some utility value, their structure is such that the opening and closing of the valve is controlled by moving a float from a hollow sphere up and down in a hollow cylinder according to the rise and fall of the water level, so it is difficult to install the valve. Afterwards, as time passes, the float and valve seat repeatedly become wet and dry, deposits accumulate on the sliding parts, and in the worst case scenario, the float becomes unable to move and loses its original purpose. It is not uncommon for people to lose touch with distant relatives.

In addition, in such conventional models, consideration was only given to the automatic intake and exhaustion, and it was thought that a distant relative would be sufficient, so air intake and water discharge were forced from the outside. It was impossible to make it happen.

In this project, we depart from the concept of conventional products and require that air intake and exhaust be performed automatically, that air can be forcibly taken in from the outside, and that water can be forcibly discharged from the device. devised a new device that

The structure of this proposal is as follows.

The float-type valve device is abolished, and a piston is installed in the cylinder chamber, one end of the piston is set at the large diameter end, and the other end is set at the small diameter end, and when the same pressure is applied to both ends separately, the piston returns to the large diameter end. Water or air is supplied from the water conduit through a strainer to the large diameter end, and the conduit, air vent valve, and ball valve are also connected to the small diameter end. On the side, the drain from the water pipe to the water discharge pipe was closed off.

Although the piston is housed within the casing, the biasing tendency toward the piston can be adjusted by rotating a shaft screwed into the casing from outside.

As described above, when air is supplied to the water pipe, the air is discharged from the drain port to the water discharge pipe by pushing the small diameter end of the piston, and on the other hand, from the strainer to the large diameter end of the piston and from the pipe to the air release valve. It is discharged to the outside via

When the air supply ends and water is supplied in the same way, the air vent valve is closed and the water pressure supplied to the large diameter end of the piston causes the piston to slide toward the small diameter end, which closes the drain port of the water conduit pipe. Therefore, the device is completely closed and the exhaust is completed.

In the case of intake, a negative pressure will be generated in the water pipe, and the outside air will flow into the water pipe from the air vent valve and the water discharge pipe, contrary to the case described above.

To forcibly discharge water, open the ball valve from the exhaust completion position to reduce the water pressure to the large diameter end of the piston.The piston will slide and the drainage port will be unblocked by the small diameter end. The water is discharged from the drain outlet to the outside through the water discharge pipe.

A similar result can be obtained by rotating the shaft to move the piston and open the drain port without operating the ball valve.

As described above, the present invention has a major feature in that the piston, which has both ends with different pressure receiving areas, is used as the source of device operation.

To explain the above configuration according to a specific example, in the drawing, 1 is a water conduit pipe for feeding water or air from the water main pipe MP to a drain port 2 and a strainer 3, and 4 is a drainage pipe. Mouth 2
5 is a cylinder chamber which is integrally formed with the water passage chamber 4 and has an open end of the strainer 3; 6 is a cylinder chamber which is connected between the cylinder chamber 5 by a conduit 7 and an air vent valve 8; It is a ball valve connected through.

The air vent valve 8 may have any structure as long as it is closed once when the water level rises to a predetermined position and opened once when the water level falls.

A piston 9 has a large diameter end 9a and a small diameter end 9b, and is slidably and rotatably supported on a shaft 10 screwed into the cylinder chamber 5 from a part of the casing C. The peripheral edge of the cylinder chamber 5 is in airtight contact with the inner wall of the cylinder chamber 5, and the small diameter end 9b is located within the water passage chamber 4 and closes the drain port 2.

Reference numeral 11 denotes a spring stretched between the large diameter end 9a of the piston 9 and the inner wall of the cylinder chamber 5, which presses the piston 9 and tends to always position it at the tip of the shaft 10.

12 is a water discharge pipe connected to the water passage chamber 4.

Various sealing materials are installed in each part of the device to maintain the necessary airtightness or liquidtightness, but in order to simplify the drawing, sealing materials other than the sealing material at the small diameter end 9b of the piston 9 are not shown. .

The explanation of the action is as follows.

(1) When exhausting the air.

When water is supplied to the water main pipe MP that has been completely laid, air in the main pipe W is first sent to the drain port 2 through the water pipe 1, and the piston 9 is moved against the spring 11 to the left in the figure. A large amount of air is released outside the device through the water flow chamber 4 and the water discharge pipe 12, and some of the air that has passed through the strainer 3 is released into the atmosphere through the cylinder chamber 5, conduit 7, and air vent valve 8. be done.

At this time, the ball valve 6 is of course in a closed state.

When all the air in the main pipe MP is exhausted and pressurized water enters the water pipe 1, the water also pushes the small diameter end 9b of the piston 9 from the drain port 2, reaches the water passage chamber 4, and is discharged from the water discharge pipe 12. However, when the air discharge is finished and the air vent valve 8 is closed, and the water from the strainer 3 fills the cylinder chamber 5, the large diameter end 9a of the piston 9 receives the water pressure in the cylinder chamber 5, and the piston 9 to the right in the figure along the shaft 10, the small diameter end 9b completely closes the drain port 2, and as long as the water pressure in the cylinder chamber 5 is maintained, water discharge from the water discharge pipe 12 is stopped. Ru.

(2) Water discharge after exhaustion is completed.

(4) Set the ball valve 6 to 1 open.

As a result, the water in the cylinder chamber 5 is drained from the ball valve 6 via the conduit 7, and although water continues to be supplied from the strainer 3, the internal pressure in the cylinder chamber 5 decreases, so the piston 9 is moved from the drain port 2 to a small diameter. The water pressure applied to the end 9b is overcome and the water is moved to the left in the figure along the shaft 10, so the drain port 2, which had been closed by the small diameter end 9b, is completely opened, and the water in the main pipe MP is allowed to flow. Water is discharged through the water chamber 4 and water discharge pipe 12.

(B) Rotate the shaft 10.

By rotating the shaft 10 that is screwed into the inside of the device, the piston 9 that is pivotally supported at the tip of the shaft 10 is rotated.
is forcibly moved to the left in the figure, and the small diameter end 9 of the piston 9 is
When the drain port 2 is unblocked by b, water is discharged from the water discharge pipe 12 in the same manner as described above.

3) When inspiration is performed.

When repairing an existing pipe, etc., when the main pipe MP starts draining, the water inside the device flows from the water conduit pipe 1 to the main pipe MP side, so the water level in the air vent valve 8 falls and the valve 8 opens 1. The air is taken into the main pipe through the air vent valve 8, the conduit 7, the cylinder chamber 5, the strainer 3, the water pipe 1, and the main pipe MP, and air is automatically taken in.

Moreover, if necessary, if the shaft 10 is rotated along the drainage on the main pipe W side and the drainage port 2 is unblocked by the small diameter end 9b of the piston 9 as described above, a large amount of water can be discharged from the water discharge pipe 12. It is also possible to take air into the main pipe MP.

As described above, according to the present invention, it is possible to obtain an intake/exhaust valve device that can automatically perform intake and exhaust operations with reliable operation, thereby eliminating inconveniences such as water hammer. Since it is also possible to discharge water, it is possible to obtain a device that has the function of a fire hydrant in addition to the function of an intake/exhaust valve device.

[Brief explanation of drawings]

The drawing is an internal explanatory view showing the present device partially in cross section. 1... Water pipe, 2... Drain port, 3...
...Strainer-14...Water flow chamber, 5...
...Cylinder chamber, 6...Ball valve, 7.
... Conduit, butt ... Air vent valve, 9...
Zeston, 9a...Large diameter end, 9b...
Small diameter end, 10...Shaft, 11...
Spring, 12... Water pipe.

Claims (1)

[Scope of utility model registration request] The end of the water conduit 1 to be connected to the water main MP is branched into a drain port 2 and a strainer 3, and the drain port 2 is opened into a water passage chamber 4 integrated with the cylinder chamber 5. is connected to the water discharge pipe 12, and the end of the strainer 3 is opened to the cylinder chamber 5, and the shaft 1 is screwed into the casing C.
The large diameter portion 9a of the piston 9 is slidably and rotatably supported by the
is installed in the cylinder chamber 5, and the drain port 2 is closed in the water passage chamber 4 with the small diameter portion 9b, and the ball valve 6 and the cylinder chamber 5 are further connected via the air vent valve 8 and the conduit 7. Intake and exhaust valve equipment.