JPH0544245A - Automatic switchgear - Google Patents

Abstract

PURPOSE:To open and close an outflow port automatically by rotatably supporting a movable piece, at one end of which an on-off valve is installed, between a close position, where a waste-water outflow port is blocked by the on-off valve, and an open position, where the outflow port is opened. CONSTITUTION:When a water level in a water tank S does not reach the position of the lower end of an on-off valve 3, movable pieces 4 are held at an open position by the holding power of a weight 5, and waste water or miscellaneous drain flows out from a waste-water outflow port S2. When the quantity of railfall increases and the water level is elevated until hydraulic pressure worked to the on-off valve 3 is made higher than the holding power of the weight 5, the movable pieces 4 are turned to a close position, the outflow port S2 is closed under the state in which a slight clearance is left in the bottom of the oval section 11 of a cylindrical body 1, and miscellaneous drain is flowed out of the outflow port S2. Miscellaneous-drain flows out of the clearance when the water level in the water tank S is made lower than the outflow port S2, and the movable pieces 4 are rotated to the open position and the outflow port S2 is opened when hydraulic pressure is made smaller than the holding power of the weight 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening / closing device installed at a sewage outlet formed in a water tank such as a public mass or a human hole.

[0002]

2. Description of the Related Art Sewers are classified into a confluence type and a diversion type.
The combined sewer system is a system in which sewage such as domestic gray water and rainwater are caused to flow through the same pipe, and the split sewer system is a system in which sewage and rainwater are caused to flow through separate pipes.

Since this sewage sewer system is a system that guides only sewage to a sewage treatment plant, it does not discharge sewage into public water areas when it rains, which is advantageous in preventing water pollution. .. Therefore, in recent years, the combined sewer system is being replaced by this split sewer system.

[0004]

However, in the area where the shunt sewer system is constructed, it is necessary to completely switch the drainage facilities of each household's sewage and rainwater, but in some cases it is difficult to switch. There is no choice but to connect sewage and sewage, which mix with sewage and rainwater, to the rainwater sewer.

Further, the construction of the sewer system is, of course, a step construction from the downstream. At the time of this construction, from the upstream area, miscellaneous drainage flows into the rainwater sewer through conventional pipes and U-shaped grooves,
As it is, it flows out into the public water area and contributes to the pollution of the river.

[0006] In order to eliminate such miscellaneous wastewater, it is a priori decided that the source should flow to the sewer pipe, but if the source is difficult to understand, or even if it is found, switching is not possible. , Inflow into the area during construction,
It is difficult to stop the mixture of miscellaneous waste water.

Therefore, the sewage flowing into the rainwater pipe is
It is sufficient to connect and store the wastewater pipe before it flows out into the public water area, but with this method, since the wastewater pipe has a small diameter, a large amount of rainwater may have flowed in during rainy weather. This causes problems because the capacity of the sewage treatment plant is increased and the capacity of the pipe is exceeded.

It is an object of the present invention to provide an automatic opening / closing device which can automatically close the wastewater outlet when a large amount of rainwater flows in, focusing on the above problems.

[0009]

In order to achieve the above object, in an automatic outlet opening / closing device of the present invention, a movable piece having an opening / closing valve at one end closes the wastewater outlet with the opening / closing valve. Is rotatably supported between a closed position in which it is open and an open position in which the on-off valve is separated in front of the sewage outlet to open the sewage outlet, and the movable piece is pivoted. A weight for holding the movable piece in the open position with a predetermined holding force is provided at a position opposite to the on-off valve across the fulcrum.

[0010]

The automatic opening / closing device of the present invention is installed at a sewage outlet formed in a water tank such as a public mass or a human hole.

Then, when the water level in the water tank does not reach the lower end position of the on-off valve due to no rain or the amount of rainfall is small even if it rains, the movable piece is opened by the holding force of the weight. The sewage, or sewage produced by mixing sewage and rainwater, is discharged from the sewage outlet.

Further, when the amount of rainfall is large and the water level in the water tank reaches the lower end position of the on-off valve, water pressure acts on the on-off valve by the miscellaneous drainage flowing out from the waste water outlet. This water pressure increases as the flow rate of the gray water flowing out from the wastewater outlet increases as the water level rises. Therefore, when the water pressure acting on the on-off valve rises to a level higher than the holding force of the weight, the movable piece rotates to the closed position, the wastewater outlet is blocked, and the miscellaneous wastewater does not flow out from the wastewater outlet. ..

Therefore, sewage that does not contain rainwater, and miscellaneous wastewater that has a relatively low quality of water and contains a small amount of rainwater,
Unnecessary wastewater of relatively good quality, which is caused by a large amount of rainwater mixed into the wastewater from the wastewater outlet, can be discharged from another outlet to the rainwater conduit or the like.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Based on. FIG. 1 is an exploded perspective view showing an automatic opening / closing device K for a sewage outlet of this embodiment, and FIG. 2 is a longitudinal sectional view showing the automatic opening / closing device K. In FIG. 1, 1 is a cylindrical body, 2 is a support plate, and 3 is a supporting plate.
Is an opening / closing valve, 4 is a movable piece, 5 is a weight, and 6 is an adjusting screw.

The tubular body 1 is formed by cutting an oval tube into short pieces and cutting a part of the upper half of the cut short oval tube to leave an oval portion 11 with the entire circumference left. And the grooved portion 12 whose upper half is cut. Further, as shown in FIG. 2, the tubular body 1 has a side wall S1 of the water tank S.
It is provided by being inserted into the sewage outlet S2 formed in. That is, opening and closing the egg-shaped portion 11 of the tubular body 1, that is, opening and closing the waste water outlet S2 of the water tank S. In addition, although the water tank S here does not specify the installation location or the like, in addition to the sewage outlet S2 communicating with the sewage pipe,
It is intended for those equipped with a rainwater outlet (not shown) that communicates with the rainwater conduit. The water tank S will be embodied later in an installation example of the automatic opening / closing device K.

The support plate 2 is fixed to the cut portion of the tubular body 1 so as to close the upper half of the oval portion 11.

The on-off valve 3 is fixed to one end of the movable piece 4 via L-shaped members 7a, 7a, and the lower half of the oval part 11 of the tubular body 1 is connected to the oval part 11. It is formed into a shape that can be closed with a slight gap left at the bottom. Also,
The open / close valve 3 is formed in a dogleg shape in a vertical cross section.

The movable piece 4 is in a closed position (indicated by a chain double-dashed line in FIG. 2) in which the opening / closing valve 3 is turned down and the opening / closing valve 3 closes the oval portion 11 of the tubular body 1. ) And the open position in which the opening / closing valve 3 is separated in front of the egg-shaped portion 11 of the tubular body 1 to open the egg-shaped portion 11,
It is supported by the support plate 2 via L-shaped members 7b, 7b. The movable piece 4 is formed in a dogleg shape, and the upper piece inclines toward the egg-shaped portion 11 side at the closed position, the lower piece becomes vertical, and the upper piece becomes horizontal at the open position, The lower piece is inclined toward the groove portion 12 side. Further, the movable valve 4 is installed so that the lower end of the on-off valve 3 inclines toward the groove 12 at the closed position.

The weight 5 holds the movable piece 4 in the open position with a predetermined holding force, and the fulcrum 41 for the rotation of the movable piece 4 is provided.
It is provided on the opposite side of the opening / closing piece 3 with the pinch in between.

The adjusting screw 6 is provided by being screwed onto the end of the movable piece 4 on the side where the weight 5 is provided, and the lower end thereof projects below the movable piece 4 and has a cylindrical shape. By abutting on the tube top of the egg-shaped portion 11 of the body 1, the rotation of the movable piece 4 is restricted, and the open position of the movable piece 4 is set at the restricted position. In other words, the adjusting screw 6 can adjust the amount of protrusion of the lower end portion. As the amount of protrusion decreases, the rotation angle of the movable piece 4 increases and the open area of the oval portion 11 increases. It is supposed to be. The open area of the egg-shaped portion 11 is preferably set according to the amount of water at the installation location.

Next, the operation of the first embodiment will be described.

When the water level in the water tank S does not reach the lower end position of the opening / closing valve 3 because it does not rain or the amount of rainfall is small even when it rains, the movable piece is moved by the holding force of the weight 5. No. 4 is held in the open position, and sewage or mixed wastewater containing sewage and rainwater flows out from the sewage outlet S2.

When the amount of rainfall is large and the water level in the water tank S reaches the lower end position of the on-off valve 3 (indicated by the arrow A in FIG. 2), the miscellaneous drainage causes water pressure on the on-off valve 3. Will work. This water pressure increases as the flow rate of the miscellaneous wastewater flowing out of the wastewater outlet S2 increases as the water level rises. Therefore, the water pressure acting on the on-off valve 3 is
When the water level rises until it becomes stronger than the holding force of the, the movable piece rotates to the closed position, and the sewage outlet S2 is closed with a slight gap left at the bottom of the oval portion 11, and most of the wastewater is discharged. Flows out from the rainwater outlet S2. At this time, the miscellaneous drainage flows out little by little from the gap formed in the bottom of the oval part 11,
The load on the sewage treatment plant is small because the amount does not exceed the treatment capacity of the sewage treatment plant.

When the rain stops, the water level in the water tank S is the rainwater outlet S
When it is lower than 2, thereafter, the gray water flows out only from the gap formed in the bottom of the oval portion 11. In this way, when the water level of the gray water gradually decreases and the water pressure acting on the on-off valve 3 becomes weaker than the holding force of the weight 5, the movable piece 4 rotates to the open position, and the wastewater outlet S2 is opened. ..

As described above, in the automatic switchgear K of the first embodiment, sewage that does not contain rainwater or sewage that is a relatively poor quality and contains a small amount of rainwater is discharged from the sewage outlet S2. Unnecessary wastewater with relatively good water quality that is caused by a large amount of rainwater mixed into the wastewater conduit can be discharged from the rainwater outlet S2 to the rainwater conduit, thus preventing pollution of public water areas. It is possible to prevent a large amount of gray water that exceeds the treatment capacity of the treatment plant from flowing out into the sewer pipe.

Next, the application of the automatic opening / closing device K will be described with reference to FIGS.

3 and 4 show the automatic opening / closing device K,
An example of installation at the sewage outlet of the public mass M is shown. The public mass M is provided downstream of the U-shaped groove U, is connected to the wastewater outlet O1 via the wastewater outlet pipe P1, and is connected to the rainwater outlet O2 via the rainwater outlet pipe P2. There is. The rainwater outlet opening to the rainwater outlet pipe P2 is formed at a position higher than the wastewater outlet opening to the wastewater outlet pipe P1.

That is, the automatic opening / closing device K is connected to the public mass M.
If it is installed at the sewage outflow port, the flow rate from the sewage outflow port through the sewage outflow pipe P1 to the sewage pipe O1 is limited on a day with a large amount of rainfall, so that the treatment capacity of the sewage treatment plant is exceeded. A large amount of miscellaneous wastewater from the common mass M to the wastewater pipe O1
Can be prevented from flowing out.

5 and 6 show the automatic opening / closing device K,
The example installed in the sewage outlet of the rainwater person hole A2 is shown.
The rainwater drainage hole A2 is connected to the wastewater drainage pipe A1 via a wastewater drainage pipe P3, and a gradient such that the wastewater naturally flows from the rainwater drainage manhole A2 to the wastewater drainage manhole A1 in the wastewater drainage pipe P3. Is provided.

For example, in a place where it is difficult to separate sewage and rainwater, such as a parking lot or a car wash, the sewage is collected in the rainwater pipe O2.
Is often led to. In addition, the rainwater at the beginning of rainfall is
At the stage of flowing on the road surface, it is often the case that the road surface is heavily polluted. Therefore, if the automatic opening / closing device K is installed at the sewage outlet of the rainwater person hole A2, the rainwater conduit O2
Before being discharged into the public water area, these wastewater flowing into the can be stored in the wastewater conduit O1 through the wastewater outflow pipe P3, which helps prevent water pollution of the public water area.

Next, the configuration of the second embodiment will be described with reference to FIGS. 7 and 8.

The automatic opening / closing device of this embodiment is an example in which the ejector 8 is connected to the oval portion 11 of the tubular body 1.

The ejector 8 includes a base 81 and a perforated pipe 8.
2, a float 83, and a cap 84.

The base 81 has a branch port 812 projecting from the side wall of the bottomed tube 811, and the inner surface of the bottomed tube 811 at a position closer to the opening end than the branch port 812. An annular flange 813 forming a circular drainage port 814 is provided in a protruding manner, and the branch port 812 is formed near the bottom of the oval portion 11 of the tubular body 1
Connected to 3.

The perforated tube 82 has a large number of holes 821 in the lower part of the tube wall and is inserted and connected to the upper part of the base 81. The holes 821 of the perforated pipe 82
Is formed at a position higher than the lower end of the on-off valve 3 in the open position.

The float 83 is provided in the perforated pipe 82, is provided in the base 81, and is connected by a cord 86 to a plug 85 capable of closing the drain port 814.

The stopper 85 is made of a material that does not float on water and is formed into a spherical shape. When the float 83 rises, the drain outlet 814 is closed by the stopper 85, and when the float 83 descends, the stopper 85 sinks and the drain outlet 814. Is to be opened.

The cap 84 is attached to the upper part of the perforated pipe 82 by fitting, and the rod 87 connected to the float 83 can be vertically inserted.

Since the other structure is the same as that of the first embodiment, the same reference numerals are given to the drawings and the description thereof will be omitted.

Next, the operation of the second embodiment will be described.

When the water level in the water tank reaches the height of the hole 821 of the perforated pipe 82, the miscellaneous wastewater enters the perforated pipe 82 through this hole 821, and the infiltrated miscellaneous wastewater is branched through the drain port 814. It is discharged from the mouth 812 to the egg-shaped portion 11 of the tubular portion 1.
When the water level in the water tank further rises and the drain port 814 is closed by the plug 85 as the float 83 rises (this closed state is indicated by a chain double-dashed line in FIG. 8), the miscellaneous drainage is discharged from the tubular portion 1 Will not be discharged to the egg-shaped portion 11 of.

Therefore, even when the movable piece 4 is in the closed position and the oval portion 11 of the tubular body 1 is closed by the opening / closing valve 3, when the water level in the aquarium is not higher than the predetermined position, the miscellaneous contents in the aquarium are kept. The wastewater can be forcibly discharged from the wastewater outlet to the wastewater outflow pipe.

Since the other operations are the same as those of the first embodiment, the description thereof will be omitted.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention.

For example, in the embodiment, the tubular body 1 having a shape obtained by cutting an oval tube into short pieces and cutting the same is shown, but the tubular body is not limited to the oval tube, and a tubular body having a shape obtained by processing a true circular tube. May be used. Further, the shape of the cut end of the tubular body 1 is not particularly limited to the embodiment, and may be cut at a right angle to the tube axis direction or may be cut obliquely.

The distance between the fulcrum of rotation of the movable piece 4 and the weight 5 may be adjusted so that the balance on both sides of the fulcrum can be adjusted.

Further, as shown by the chain double-dashed line in FIG. 2, one plate material 9 may be provided inside the groove 12 of the tubular body 1. By doing so, a step is formed inside the tubular body 1, the flow velocity of the sewage flowing out from the sewage outlet S2 is increased, and the movable piece 4 is rotated to the closed position at a lower water level than the embodiment. become.

[0048]

As described above, in the automatic switchgear according to the present invention, dirty water that is not mixed with rainwater or miscellaneous wastewater with a relatively small amount of rainwater mixed into the dirty water has a dirty water flow. Open the outlet to let the sewage outlet flow into the sewage pipe,
Unnecessary wastewater with a relatively high water quality, which is a mixture of a large amount of rainwater into the wastewater, can be prevented from flowing out of the wastewater outlet by closing the wastewater outlet. It is possible to obtain an effect that it is possible to prevent a large amount of gray water that exceeds the treatment capacity of the site from flowing out into the sewer pipe.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an automatic opening / closing device of a first embodiment.

FIG. 2 is a vertical sectional view showing the automatic opening / closing device of the first embodiment.

FIG. 3 is a plan view showing an installation example of the automatic opening / closing device of the first embodiment.

FIG. 4 is a vertical cross-sectional view showing an installation example of the automatic opening / closing device of the first embodiment.

FIG. 5 is a plan view showing an installation example of the automatic opening / closing device of the first embodiment.

FIG. 6 is a vertical cross-sectional view showing an installation example of the automatic opening / closing device of the first embodiment.

FIG. 7 is an exploded perspective view showing an automatic opening / closing device of a second embodiment.

FIG. 8 is a vertical sectional view showing an automatic opening / closing device of a second embodiment.

[Explanation of symbols]

 3 Open / close valve 4 Movable piece 5 Weight S Water tank S2 Sewage outlet

Claims (1)

[Claims] 1. An automatic opening / closing device installed at a sewage outlet formed in a water tank, wherein a movable piece having an opening / closing valve at one end closes the sewage outlet at the opening / closing valve. It is rotatably supported between a closed position and an open position in which the on-off valve is separated from the front of the sewage outlet to open the sewage outlet, and the movable piece has a rotation fulcrum. An automatic opening / closing device, characterized in that a weight for holding the movable piece in an open position with a predetermined holding force is provided at a position opposite to the opening / closing valve.