JP4417280B2 - Drainage drainage equipment - Google Patents

Description

  The present invention relates to a drainage drain facility provided when drainage drainage from a water pipe is discharged into a sewer.

  It is desirable that drainage from a drainage device provided in a water pipe, for example, discharge water from a foreign matter catching device or a fire hydrant provided in a water supply system, is discharged into a sewer in an urban area. It is not preferable in terms of road management to discharge water on the road, and if the water is discharged into a pit containing the drainage device, the drainage device may be submerged.

  However, if the discharge pipe from the drainage source is connected directly to the sewer (such as a manhole of the sewer) in order to discharge the wastewater into the sewer, the sewage odor may reach the water pipe or a reverse flow of the sewage will occur. And sanitary problems occur. For this reason, in order to solve the sanitary problem, various drainage drain technology is disclosed.

For example, Patent Document 1 discloses a relay pump tank (water discharge) between a drainage source and a treatment device when a treatment device for separating sludge and the like is interposed in the middle of a drainage route from a drainage source (drainage device) to a sewer. I). The drainage pipe from the drainage source is connected to the relay pump tank, and the discharged water flows in. The drainage pumped up from the relay pump tank is sent to the treatment device, and then flows into the sewer after undergoing a predetermined treatment. To do.
On the side wall of the relay pump tank, an outlet is provided at a position lower than the inlet of the outlet pipe and at a position higher than the highest water level in the tank at normal time, and an overflow pipe connected to the outlet However, it is connected to the sewer with a slight downward slope. The overflow pipe is provided with a backflow prevention wall that rises upward from the bottom of the pipe, so that the sewage does not flow back into the relay pump tank even if the water level in the sewage tank rises due to a large amount of discharge from the treatment device. It has become.

In Patent Document 2, a discharge pipe extending from a drainage device to a sewer is opened downward in the sewer, and a ball-like float valve body is provided in the opening. The float valve body receives buoyancy from the stagnant water in the sewage basin and normally closes the opening, opens at the water pressure only when water flows into the sewage basin from the discharge pipe, and opens to the discharge pipe and drainage device side. Prevents sewage backflow.
JP 2002-322732 A Japanese Utility Model Publication No. 53-86843

  However, in the drainage drainage facility described in Patent Document 1, when the sewer main increases due to heavy rain and the water level in the sewerage drastically increases, the sewage overflows the backflow prevention wall and relays. There is a risk that it will flow into the pump tank. When sewage flows into the relay pump tank, the sewage flows back to the drainage source (drainage device) side through the discharge pipe, which is not preferable. Further, the odor and generated gas from the sewage pipe are not preferable because they reach the drainage source side through the overflow pipe, the relay pump tank, and the discharge pipe.

  In addition, in the drainage drainage facility described in Patent Document 2, the float valve element opens the outlet pipe only when discharging into the sewer, and closes at other times, preventing backflow of sewage to the water pipe side. In addition, odor inflow can be prevented to some extent. However, according to this apparatus, since the discharged water must push down the float valve body by the water pressure to open the opening, a discharge resistance is generated in the flowing water. Discharge resistance is not preferable because it inhibits smooth water discharge.

  In view of this, the present invention provides a drainage drainage facility for connecting a drainage device provided in a water pipe and a sewer to prevent backflow from the sewer to the water pipe and to prevent the inflow of odor and to smoothly discharge the odor. Is an issue.

   In order to solve the above problems, the present invention provides a drainage basin in the middle of the drainage path from the drainage device to the sewage basin, connects the basin and the sewer via a drainage trap, and A float valve body was provided at the inlet, and the inlet was normally opened by the float valve body and closed when the sewer increased.

In this way, water flows backward from the sewer at the time of water increase, and when the water level in the drainage basin rises, the inlet is closed, so the sewage does not flow backward to the drainage device. Further, the odor from the sewer is normally blocked by a drain trap, and even when the water is increased, the float valve body closes the inlet and is blocked and does not reach the drainage device side.
Further, since the float valve body opens the inlet at normal times other than the time when the water increases, the discharge resistance at the time of discharging from the drainage device to the drainage can be reduced. For this reason, discharge can be made smooth.

  Since the present invention is as described above, in the drainage drainage equipment connecting the drainage device provided in the water pipe and the sewer, the backflow from the sewer to the water pipe is prevented, the inflow of odor is blocked, and the discharge Can be made smooth.

As a specific embodiment of the above means, in a drainage drain facility provided for discharging drainage drainage from a drainage device provided in a water pipe to a sewer, a drainage canal in the middle of a drainage path connecting the water pipe and the sewer The drainage basin is provided with a downward inflow port through which the drainage water flows, and a float valve body is provided on the valve seat of the inflow port so as to be able to contact and separate. An overflow pipe is connected to the drainage basin at a height below the valve seat, and the overflow pipe is connected to the sewer through a drain trap.
The float valve body opens the inlet when water in the drainage basin is discharged to the sewer via the overflow pipe, and the water level in the sewer rises and flows back into the basin. When doing so, the inlet was closed.

In this way, when the sewer increases, the sewage flows into the drainage basin through the overflow pipe, and the water level in the basin rises. And if the water level in a drainage basin exceeds predetermined height, a float valve body will close the said inflow port. If the inflow port is closed, the sewage does not flow back to the drainage device. In addition, the odor from the sewer is blocked by a drain trap during normal times other than during flooding, and does not reach the drainage basin. Even when sewage flows from the sewer into the drainage basin, it rises to a predetermined level. Then, since the float valve closes the inlet, the odor does not reach the drainage device.
Further, in normal times, the water in the drainage basin is discharged into the sewer through the overflow pipe, and the water level in the discharge basin is lower than the connection height of the overflow pipe, and the float valve body floats on the water surface. Is in a state in which the inlet is opened away from the valve hole. For this reason, the discharge resistance at the time of discharge from the drainage device to the drainage basin becomes small, and the discharge by the drainage device can be made smooth.

  Further, in the above configuration, the inflow port has an enlarged diameter portion extending below the valve seat, and the float valve body has a plurality of directions to the inflow port via a spring attached to the inside of the enlarged diameter portion. If the valve body is supported and maintained directly below the valve seat, the valve body is always located below the valve hole, and the valve closing when the water level rises becomes smooth.

  One embodiment will be described with reference to FIGS. As shown in FIG. 1, the drainage drain facility 10 includes a drainage basin 12 in the middle of a drainage path connecting the discharge device 1 provided in the water pipe 2 in the pit 11 and the manhole 13 of the sewer S, The water in the water pipe 2 discharged from the discharge device 1 is discharged into the sewer S through the water discharge tank 12.

As shown in FIG. 2, the discharge device 1 is a sediment trap type foreign matter trapping device using a cross tube 7, and a drain 4 that discharges (discharges) water in the tube is connected to the bottom of the cross tube 7. Has been. The drain 4 is drawn out of the pit 11 and is drawn into the water discharge basin 12 through the connecting portion 4 a made of a flexible material. The inlet 3 at the tip of the drain 4 is drawn into the water discharge tub 12. It is opened downward toward the stagnant water.
If the motor-operated valve 9 provided in the middle of the drain 4 is operated, the drain water from the water pipe 2 is discharged to the drain 12 through the drain 4. Further, when the connecting portion 4a is made of a flexible material, the distance between the ridges and the pits can be easily set, so that the positions of the pits 11, the water discharge ridges 12 and the like can be freely arranged. Moreover, at the time of an earthquake, it can prevent that the drain 4, the pit 11, and the drainage dam 12 are damaged.

  Further, as shown in FIG. 3, the inlet 3 at the tip of the drain 4 has a downward valve seat 16, and has a cylindrical enlarged diameter portion 3 a extending further downward from the valve seat 16. The inner diameter of the enlarged diameter portion 3a is larger than the outer diameter of the valve seat 16, and a spherical float valve body that opens and closes the inlet 3 in contact with and away from the valve seat 16 inside the enlarged diameter portion 3a. 15 is provided.

  Further, as shown in FIG. 3, the float valve body 15 is supported from a plurality of directions via a spring 14 inside the diameter-expanded portion 3a (supported at two opposing positions in this embodiment). The valve body 15 moves up and down below the valve seat 16 so as to coincide with the center of the valve hole.

  On the other hand, the drainage basin 12 and the manhole 13 of the sewer S are connected via an overflow pipe 5. In the overflow pipe 5, the connection part 5 a to the drainage basin 12 and the connection part 5 b to the manhole 13 have the same height, and the U-shaped shape shown in FIG. 1 is provided between the connection parts 5 a and 5 b. Through a drain trap 8. Further, the height of the connecting portion 5a to the drainage basin 12 is lower than the height of the valve seat 16, as shown in FIG.

  Therefore, the float valve body 15 opens the inlet 3 when the water level in the drainage basin 12 is lower than the connection portion 5a, that is, near the water level L indicated by the solid line in FIG. To do. When the water level in the sewer S rises and rises, the water level in the drainage basin 12 exceeds a predetermined height as shown by a chain line in FIG. 3, that is, shown by a chain line in FIG. When it is above the water level H (during water increase), it rises and closes the inlet 3.

Explaining the operation of this drainage drain facility, drainage drainage from the drainage device 1 of the water pipe 2 flows into the drainage basin 12 from the inflow port 3, and the water level of the stagnation part in the basin 12 rises. Since a certain amount of water is always stored in the drainage basin 12, the drainage does not directly hit the bottom of the basin, and the deterioration of the drainage basin 12 due to the impact of water is prevented.
When the water level in the drainage basin 12 reaches the height of the connecting portion 5a, water is discharged to the manhole 13 side through the overflow pipe 5, so the water level in the basin 12 is higher than that of the connecting portion 5a. Does not rise. Therefore, the float valve element 15 is in the vicinity of the water level L indicated by a solid line in FIG. At this time, the float valve body 15 is sufficiently separated from the valve seat 16, and thus does not hinder the discharge of water from the inflow port 3. Further, since the drainage trap 8 is interposed between the manhole 13 and the water discharger 12, odor does not reach the water discharger 12 via the overflow pipe 5.

  When the amount of water in the sewer S increases due to heavy rain and the water level in the manhole 13 becomes equal to or higher than the connecting portion 5b, the sewage starts to flow back into the drainage basin 12 through the overflow pipe 5. As a result of this reverse flow, the water level in the drainage basin 12 rises above the connecting portion 5a and eventually rises to the vicinity of the water level H indicated by the chain line in FIG. For this reason, the backflowed sewage does not enter the drain 4. Further, the odor does not reach the discharge device 1 through the drain 4.

  Further, since the net 17 is attached to the inflow port 3, foreign matter enters the enlarged diameter portion 3 a from the water stagnation part in the drainage basin 12, and the foreign matter passes between the float valve body 15 and the valve seat 16. This prevents the valve from being blocked.

  In this embodiment, the connecting portion 5a of the overflow pipe 5 to the drain 12 and the connecting portion 5b to the manhole 13 have the same height, but the connecting height is the valve seat 16 of the inlet 3. In relation to the height, it is free if the float valve body 15 is set to a height at which the inlet 3 can be closed during reverse flow.

The float valve body 15 may be of any material and shape as long as it floats on the water and can close the inlet 3 as the water level rises. For example, it may be made of resin, and if it is made of metal, it is desirable to use a hollow sphere. Moreover, in order to improve the water-stopping property of the inflow port 3, you may give the rubber lining to the surface.
Furthermore, since the springs 14 that support the float valve body 15 are provided for securing the position of the valve body 15, it is desirable that the springs 14 be supported from a plurality of directions in equal directions. The arrangement is free. The material of the spring 14 is desirably stainless steel with good corrosion resistance.

  By adopting the above configuration, in addition to the drainage device 1 generally provided in the middle of the water pipe 2, for example, the drainage device 1 arranged as a countermeasure against dead water at the end of the water pipe 2 can be supported. Become.

Overall view of one embodiment Detailed view of the drainage device 1 of FIG. Detailed view of the inlet

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drainage device 2 Water pipe 3 Inlet 3a Expanding part 4 Drain 5 Overflow pipe 6 Opening and closing plug 7 Cross pipe 8 Drain trap 9 Electric valve 10 Drain drain equipment 11 Pit 12 Drainage basin 13 Manhole 14 Spring 15 Float valve body 16 Valve seat 17 Net S Sewer

Claims (2)

In the drainage drain facility 10 provided to discharge the drainage from the drainage device 1 provided in the water pipe 2 to the sewer S,
A drainage basin 12 is provided in the middle of a drainage path connecting the water pipe 2 and the sewer S, and a downward inlet 3 into which the drainage drainage flows is provided in the drainage basin 12, and a valve seat 16 of the inlet 3 is provided. A float valve body 15 is detachably provided, and an overflow pipe 5 is connected to the drainage basin 12 at a height below the valve seat 16, and the overflow pipe 5 is connected to a sewer S through a drain trap 8. connection,
The float valve body 15 opens the inlet 3 when the water in the drainage basin 12 is discharged into the sewer S through the overflow pipe 5, and the water level in the sewer S rises. The drainage drainage system, wherein the inflow port 3 is closed when the water flows backward into the drainage basin 12.   The inflow port 3 has an enlarged diameter portion 3a extending below the valve seat 16, and the float valve body 15 is connected to the inflow port 3 from a plurality of directions via a spring 14 attached to the inside of the enlarged diameter portion 3a. The drainage drainage facility according to claim 1, wherein the drainage drainage device is supported and maintained immediately below the valve seat 16.

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