JPH03277881A - Cleaning device for air valve - Google Patents

Abstract

PURPOSE:To remove foreign materials from the inside of a valve box by connecting one edge of a feeding pipe with an exhaust port and connecting the other edge in demountable manner with the feeding port of a compressed air feeding source and feeding the compressed air from the compressed air feeding source. CONSTITUTION:In the state that a selector valve 13 is switched to the first passage, one edge of a feeding pipe is connected to an exhaust port 10a, and the other edge is connected in demountable manner with the feeding port 23 of a compressed air feeding source 20, and the fluid (sewage water) and foreign materials in a valve box 2 are pushed out into a drain pipe 1 by a compressed air stream by feeding the compressed air from the compressed air feeding source 20, and the foreign materials are removed from the inside of the valve box. Further, after the foreign materials are removed, the selector valve 13 is switched to the second passage, and a cleaning liquid recirculation pipe 37 is connected with the output of the second passage, and further, the other edge of the feeding pipe is demounted from the feeding port of the compressed air feeding source 20, and connected in demountable manner with the feeding port 34 of a clean liquid feeding source 30, and cleaning liquid is supplied from the cleaning liquid feeding source, and allowed to circulate, and the foreign materials are removed from the valve box 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning device for an air valve equipped for removing air from a water pipe such as a sewer pipe.

[Prior Art] For example, the air valve shown in FIG. A valve box 2 is installed in communication with the water pipe 1, a float 3 is housed inside the 11 box 2, a valve body 4 is installed on the float 3 and extends upward, and a bottle 5 is connected to the valve stem 4. The valve body 7 is connected to the upper side of the valve stem 4 with a relative movement amount approximately corresponding to the vertical length of the elongated hole 6.

11 body 7 has a hollow shaft portion 7A having a small air hole 7a at the center of the lower end and forming a hollow portion that extends vertically along the axis;
It consists of a flange part 7B extending radially outward at the lower end of the hollow shaft part 7A, and the flange part 7B is located inside the valve box cover 8 which is removably attached to the upper part of the valve box 2. An annular seal member 7b attached to the upper surface faces the lower surface around the valve hole 9A of the seat receiver 9 attached to the upper part of the valve box cover 8, that is, the valve seat 9B.

The upper part of the hollow shaft part 7 passes through the inside of the seat holder 9, that is, through the inside of the exhaust chamber 10 which communicates with the outside via the exhaust port 10a, and is attached to the upper part of the seat holder 9. The diaphragm IIA is slidably inserted into the diaphragm device ll, and the diaphragm IIA is attached to the upper end thereof, and is biased in the valve closing direction (upward) by the spring force of the spring 12, and the upper pressure chamber 11B of the diaphragm IIA
communicates with the outside via air nozzle llb,
Between the valve box 2 and the water pipe l, there is a switching valve 13 (three-way) that can switch and form a first path connecting the valve box 2 and the water pipe l and a second path connecting the valve box 2 and the outside of the valve box. valve) is provided. In addition, 14 in the figure shows a strainer.

Therefore, in the initial state when piping of one water pipe 1 is completed by switching the switching valve 13 to the first path, the float 3 hangs down, the valve body 7 rises due to the spring force of the spring 12, and the flange portion The sealing member 7B of the valve seat 7B is held in a closed state in close contact with the valve seat 9B of the seat receiver 9. For this purpose, the air in the water pipe 1 flows from the valve box 2 through the small air hole 7a of the valve body 7 into the hollow shaft portion 7A, as shown by the arrow, and from there enters the pressure chamber 11B.

The air is exhausted to the outside through the air nozzle flb (initial exhaust).

When the air pressure inside the water pipe 1 and the valve box 2 increases as the water pipe 1 is filled with water, the pressure chamber 11B also becomes high pressure, and the diaphragm I resists the spring force of the spring 12.
Since the IA is pushed down and the valve body 7 is also pushed down via the bottle 5, the valve is in an open state in which the seal member 7b of the flange portion 7B is separated from the valve seat 9B of the seat receiver 9, as shown in FIG. As a result, the inside of the valve box 2 is communicated with the outside through the path of the valve hole 9A, the exhaust chamber 1O1, and the exhaust port 10a. The sewage enters the valve box 2.

As sewage enters the valve box 2, buoyancy is generated in the float 3 and it rises, so the upper end of the valve stem 4 closes the small air hole 7a of the valve body 7 and pushes the valve body 7 upward. Therefore, as shown in FIG. 5, the valve hole 9A is closed and the air pocket 15. In this way, after the air valve is closed, if the air mixed in the sewage in the water pipe 1 enters the valve box 2, the air will be closed. The pressure in the pool 15 increases, and the liquid level (sewage level) in the valve box 2 increases.
lower. Therefore, the buoyancy of the float 3 decreases and it descends, returning to the state shown in FIG. 4 and exhausting under pressure.

Furthermore, when the inside of the valve box 2 becomes negative pressure due to drainage work of the water pipe 1, atmospheric pressure is applied to the valve body 7 through the path of the exhaust bow 10a and the exhaust chamber 1O1 and the valve hole 9. body 7
, a large amount of air is sucked in as shown by the arrow in FIG.

[Problems to be solved by IJJ] By the way, floating matter and sludge-like substances adhere to and accumulate on the valve box 2 of the air valve, so the switching valve 13 should be connected to the valve box 2 as shown in figure fJJ7. By switching to the second route that connects to the outside of the valve box, the foreign matter is discharged to the outside together with the fluid inside the valve box 2. However, since the sewage also contains foreign matter containing oil and fat components, Over time, this foreign material
They may adhere to the inner strainer 14 and cause clogging.

Alternatively, the valve body 7, valve seat 9B, etc. may adhere, causing malfunction of the air valve. Foreign matter containing such oil and fat components has a strong adhesive force, so it cannot be removed and discharged by the above-mentioned foreign matter discharge operation.

Therefore, internal inspection and cleaning work is performed periodically (every 2 to 6 months).

However, when performing internal inspection and cleaning work, it is necessary to disassemble the air valve. In other words, such manual disassembly, inspection and cleaning work, which requires removing the valve box cover 8 from the valve box 2, takes a long time, although it requires a relatively high level of skill. . Moreover, during disassembly work, the workers inhale harmful gases and the workers are exposed to harmful liquids, resulting in poor safety.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide an air valve cleaning device that can clean the air valve without disassembling it, shorten working time, and improve safety. .

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a float that rises and lowers in accordance with the water level of water flowing from the water pipe side into a valve box installed in communication with five water pipes. The valve body that is arranged and connected to this float and moves up and down opens and closes the space between the valve box and the exhaust chamber formed on the upper side of the valve box, and also connects the valve box and the water pipe between the valve box and the water pipe. In an air valve equipped with a switching valve that can switch between a first path connecting the valve body and a second path connecting the valve body and the outside of the valve body, a compressed air supply source, a cleaning liquid supply source, A supply pipe whose one end is removably connected to the supply port of each of these supply sources alternately and whose other end is connected to the exhaust port of the exhaust chamber, and a supply pipe which is connected to the outlet of the second path of the switching valve and which is connected to the cleaning liquid. and a cleaning liquid reflux pipe for refluxing the cleaning liquid to the cleaning liquid supply source.

[Operation] According to the present invention, while the switching valve is switched to the first path, the other end of the supply pipe is connected to the exhaust port, and the one end is removably connected to the supply port of the compressed air supply source. Thereafter, by supplying compressed air from the compressed air supply source, the fluid (sewage) and foreign matter inside the valve box can be pushed out into the water pipe by the compressed air flow, and the foreign matter can be removed from inside the valve box.

After the foreign matter is removed, the switching valve is switched to the second route, the cleaning liquid return pipe is connected to the outlet of the second route of the switching valve, and the other end of the supply pipe is connected to the compressed air supply source. After removing it from the supply port of the valve and removably connecting it to the supply port of the cleaning fluid supply source, the cleaning fluid is supplied from the cleaning fluid supply source and the cleaning fluid is circulated to remove oil and fat components attached to the valve box and valve body. The foreign matter containing the cleaning liquid is removed and returned together with the cleaning liquid to the cleaning liquid supply source through the cleaning liquid return pipe.

[Example] Embodiments of the present invention will be described below based on the drawings.

1 and 2 are longitudinal sectional front views of an air valve to which the present invention is applied. The present invention is characterized in that one end of a compressed air supply source, a cleaning liquid supply source, and a supply port of each of these sources are removably connected alternately, and the other end is connected to an exhaust port of the exhaust chamber. The configuration includes a supply pipe and a cleaning liquid return pipe that is connected to the outlet of the second path of the switching valve and returns cleaning to the cleaning liquid supply source, and other members and their configurations other than these are conventional. Since it is not different from the example,
In FIGS. 1 and 2, parts corresponding to those in FIGS. 3 to 7 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In FIGS. 1 and 2, 20 is a compressed air supply source;
30 indicates a cleaning liquid supply source, and the compressed air supply source 20 includes, for example, a near compressor 21 and a check valve 22, and is equipped with a supply port ((r) 23. Furthermore, the cleaning liquid supply source 30 is, for example, It consists of a cleaning liquid storage tank 31, a cleaning liquid circulation pump 32, and a reverse 1t-5F 33, and is provided with a supply port (5F) 34 and a reflux port (buf) 35.

One end of the supply pipe 36 is connected to the compressed air supply if as shown in FIG.
It can be detachably connected to the supply port 23 of the cleaning liquid supply source 30 as shown in FIG. The other end of the supply pipe 36 can be connected to the exhaust port lea of the exhaust chamber 10.

One end of the cleaning liquid reflux pipe 37 is connected to the reflux port 3 of the cleaning liquid supply source 30.
5, and the other end is the outlet 1 of the second path of the switching valve 13.
It can be connected to 3A.

With such a configuration, as shown in FIG.
is switched to the first route, the other end of the supply pipe 36 is connected to the exhaust port 10a of the exhaust chamber 10, and one end is removably connected to the supply port 23 of the compressed air supply source 20, and then the supply By opening the port 23 and supplying compressed air from the compressed air supply source 20 to the exhaust chamber lO, the compressed air flow pushes down the valve body 7 and roughly passes the fluid (sewage) and foreign matter inside the valve box 2. Foreign matter that has entered the valve box 1 can be removed by pushing it out into the water pipe 1.

Once the foreign matter has been removed, the supply port 23 is closed, the supply pipe 23 is removed from the supply port 23, and is removably connected to the supply port 34 of the cleaning liquid supply source 30 as shown in FIG. After switching the switching valve 13 to the second path and connecting the other end of the cleaning liquid recirculation pipe 37, one end of which is connected to the recirculation port 35 of the cleaning liquid supply source 30, to the outlet 13A of the second path of the switching valve 13. By opening the supply port 34 and circulating the cleaning liquid by supplying the cleaning liquid from the cleaning liquid supply source 30 to the exhaust chamber 1O, the cleaning liquid contains oil and fat components attached to the valve box 2, the valve body 7, etc. The foreign matter is removed and passed through the cleaning liquid return pipe 37 together with the cleaning liquid to the tank 3 of the cleaning liquid supply source 30.
1, and foreign matter containing oil and fat components is appropriately collected here.

As mentioned above, since the air valve can be cleaned without disassembling it, the time required for the two operations is significantly reduced. Moreover,
Water pipes without leaking harmful gases or liquids to the outside
There is no risk of one worker inhaling harmful gases or having harmful liquids adhere to the worker, thus improving safety.

[Effect of the invention] Since the present invention is configured as described above.

This produces the effects described below.

That is, connect the other end of the supply pipe to the exhaust port.

After removably connecting the end to the supply port of the compressed air supply source, by supplying compressed air from the compressed air supply source, the fluid and foreign matter in the valve body are pushed out into the water pipe by the compressed air flow. After removably connecting one end of the supply pipe to the supply port of the cleaning liquid supply source and connecting the cleaning liquid return pipe to the outlet of the second path of the switching valve, the switching valve By switching to the second path and circulating the cleaning liquid by supplying the cleaning liquid from the cleaning liquid supply source, it is possible to remove foreign substances containing oil and fat components that are attached to the valve box and valve body. Since the air valve can be cleaned without disassembling it, work time is significantly shortened, and harmful gases or liquids can be contained in the water pipes without leaking outside, so workers can avoid inhaling harmful gases. There is no risk of the worker getting exposed to harmful liquids, thus improving safety.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional front views of an air valve to which the present invention is applied, and FIG. 3 is a longitudinal sectional front view showing an example of a conventional air valve.
Figures 4 to 6 are enlarged sectional views showing the operating state;
The figure is a sectional view showing a state in which the switching valve is switched to the second path. l... Water pipe 2... Valve box 3... Float 7... Valve body 10... Exhaust chamber 0a... Exhaust port 3... Switching valve 0... Compressed air supply source 3 ... Supply port 0 of compressed air supply source ... Cleaning liquid supply source 4 ... Supply port 4 of cleaning liquid supply source ... Cleaning liquid return pipe

Claims (1)

[Claims] (1) A float that moves up and down according to the water level of water flowing in from the water pipe side is placed in a valve box installed in communication with the water pipe, and the valve element connected to this float moves up and down.
The space between the valve box and the exhaust chamber formed on the upper side of the valve box is opened and closed, and a first path connecting between the valve box and the water pipe and the valve box and the outside of the valve box are opened and closed. In an air valve equipped with a switching valve capable of switching and forming a second path connecting the and a cleaning liquid return pipe connected to the outlet of the second path of the switching valve to return the cleaning liquid to the cleaning liquid supply source. An air valve cleaning device characterized by: