JPH0643241Y2 - Structure of the auxiliary inflow pipe of the manhole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a manhole, and more particularly to a structure of a sub-inflow pipe for controlling the flow of water into the manhole.

(Prior art and problems) Manholes are formed almost vertically from the road surface to the underground in order to perform various operations such as inspection, cleaning, and exhaust of sewage culverts, but the height of sewage flowing into the manhole is high. If the height is too high from the bottom of the manhole, workers working in it may overwhelm the sewage and, in some cases, risk life-threatening with sudden water streams similar to flash floods.

For this reason, when the inflow pipe is attached to the manhole main pipe so as to drop the sewage from a certain height, for example, a height of 60 cm or more, a part of the sewage is dropped before entering the manhole and the manhole is not dropped from below. It is desirable to equip a sub-inflow pipe that flows into the inside, and it is standardized in some cases.

This sub-inflow pipe is composed of a straight pipe directly connected to the inflow pipe and an L-bend pipe connected to the lower pipe and connected to the Manhoe main pipe. After arranging it in the frame, a frame was formed around it, and fresh concrete was poured into the frame to solidify.

However, such on-site construction not only requires skill but also has a problem that the construction period is long and the cost is high.

In addition, the sub-inflow pipe is connected to the inflow pipe and the manhole main, but the difference in the self-weight of the construction objects of the sub-inflow pipe and the manhole main and the density distribution of the backfilled soil are not constant. Therefore, there was a defect that the sub-inflow pipe was displaced from the main manhole main pipe after burial, and the pipe was cracked or water leaked.

(Means for Solving Problems) In view of the above points, the present invention can be quickly assembled by simply assembling it on site, and even if there is a difference in its own weight or the surrounding earth pressure is distorted, the main manhole main It is intended to provide a sub-inflow pipe that is integrated with the above and has high water tightness and high durability.

The main points are a pedestal with an arcuate side surface circumscribing the bottom plate of the main manhole main body, the upper surface of which is a downward slope toward the bottom plate, and the opening of the L-shaped curved pipe is buried facing the upper and side surfaces. And a straight pipe installed between the upper opening of the L-shaped bent pipe and the inflow pipe, with its side surface being an arc surface circumscribing the manhole main pipe and the bottom surface having a downward slope toward the manhole main pipe. And a structure of an auxiliary inflow pipe for a manhole, which is formed by a combination with an adjusting block having an arc surface circumscribing the main pipe of one side and having a through hole for fitting a straight pipe in the center.

The manhole to which the present invention is applied is generally a sewer manhole, but is not particularly limited. The sub-inflow pipe is attached so that the height of the inflow pipe is, for example, 60 from the bottom of the manhole.
This is the case where the sewage is not less than cm, and not all of the sewage is discharged from the inflow pipe, but a part of the sewage needs to be branched from the channel in front of it to the bottom of the manhole body.

The present invention comprises a combination of a pedestal, an L-shaped curved pipe, a curved pipe block, a straight pipe, and an adjustment block. The L-shaped curved pipe and the straight pipe are generally made of ceramics, and the pedestal, the curved pipe block, and the adjustment block are basically concrete products.

The pedestal has an arcuate side surface circumscribing the bottom plate of the manhole main pipe, and its upper surface has a downward slope toward the bottom plate. The gradient is not particularly limited, but a range of 15 to 60 degrees is desirable. The entire top surface does not have to have a slope, but the arbitrary length from the concrete main pipe has the slope.

The L-shaped curved pipe is embedded in the curved pipe block with its opening facing the upper surface and the side surface, and one side surface thereof is an arc surface circumscribing the manhole main pipe. The L-shaped bent pipe is normally bent 90 degrees, but the present invention can be applied to other cases. Further, the bottom surface thereof has a downward slope toward the main manhole main pipe at the same angle as the upper surface of the pedestal.

The straight pipe is installed between the upper opening of the L-shaped bent pipe and the inflow pipe, and is surrounded by the adjustment block. This adjusting block has an arc surface having one side surface circumscribing the manhole main pipe, and has a through hole for fitting the straight pipe in the center, and a plurality of adjusting blocks are installed according to the length of the straight pipe. It is desirable to form irregularities on the joint surface so that the adjustment blocks do not laterally shift. A belt or the like may be used to tighten between the pedestal and the bottom plate and between the straight pipe and the inflow pipe.

(Operation) Since the present invention is configured as described above, a pedestal, a curved pipe block in which an L-shaped curved pipe is embedded, and an adjustment block must be prepared in a concrete product manufacturing factory before installing this on site. deep. Bring straight pipes to the site as they are.

First, attach the pedestal to the bottom plate of the manhole body. Since one side of the pedestal corresponds to the curvature of the bottom plate, the surface is just joined. If desired, an iron belt or adhesive may be used to strengthen the bond.

Then, the curved tube block is placed on the pedestal. At this time, the arcuate side faces are placed on the pedestal with the curved side faces facing the manhole and the sloped bottom faces of the curved pipe block aligned. The lower opening of the L-shaped bent tube is inserted into the opening provided below the manhole.

Further, a straight pipe is fitted in the upper opening of the L-shaped bent pipe, and the adjusting block is stacked up to the lower edge level of the inflow pipe of the manhole with the arc-shaped side surface facing the manhole side. Finally, the inflow pipe is connected to the manhole and the straight pipe.

(Embodiment) Explaining in accordance with an embodiment shown in the drawings, 1 is a cylindrical manhole main pipe, and 2 is a bottom plate. 3 is an inflow pipe connected to the inflow port 4 of the manhole main 1, and 5 is a manhole main 1
It is an outflow pipe connected to the outflow port 6 of.

Reference numeral 7 denotes a pedestal, and one side surface of the pedestal 7 has an arc surface equal to the curvature of the bottom plate 2, and the upper surface thereof faces the bottom plate 2 by about 25 mm.
It has a downward slope of degrees.

Reference numeral 8 is a 90-degree L-shaped curved pipe, and the curved pipe 8 is embedded in a curved pipe block 9. One side surface of the curved pipe block 9 is an arc surface equal to the curvature of the bottom plate 2, and the lower surface thereof has a downward slope of about 25 degrees toward the bottom plate 2, and the lower opening 10 of the curved pipe 9 is formed.
Faces the manhole 1. Reference numeral 11 is a straight pipe, and the upper opening 12 is connected to the auxiliary inlet 13 of the inflow pipe 3, and the lower opening 14 is connected to the upper opening of the L-shaped bent pipe 8.

Reference numeral 15 is an adjustment block that surrounds the straight pipe 11 and is stacked in multiple stages. One side of the adjusting block 15 is also an arc surface that circumscribes the manhole body.

(Effect) As described above, in the present invention, the constituent parts of the auxiliary inflow pipe are the pedestal, the curved pipe block in which the L-shaped curved pipe is embedded, the straight pipe,
Since it is an adjustment block, you only have to assemble it in order from the bottom on the site, so you do not need a skilled technique like on-site casting of fresh concrete, you can assemble extremely quickly, and the construction period can be shortened significantly. Can be planned.

Further, after the assembly is completed and the soil is backfilled, an irregular pressure is applied to the sub-inflow pipe from the surrounding soil, and this biased pressure may cause a deviation, but in the present invention, the curved pipe block is It is placed on a pedestal with an inclined surface and is constantly biased toward the manhole. Since it is circumscribed, the whole is always in close contact with the manhole body and is not affected by irregular pressure from the surrounding soil,
It is possible to install a secondary inflow pipe that is highly watertight and durable.

[Brief description of drawings]

FIG. 1 is an external view showing the structure of an auxiliary inflow pipe according to the present invention,
2 is a sectional view thereof, FIG. 3 is a perspective view of a pedestal, and FIG. 4 is a perspective view of an adjustment block. 1 ... Manhole main pipe, 2 ... Bottom plate, 3 ... Inflow pipe, 4
…… Inlet, 5 …… Outlet pipe, 6 …… Outlet, 7 …… Pedestal, 8 …… L-shaped bend pipe, 9 …… Bend pipe block, 10 …… Lower opening, 11 …… Straight pipe, 12 …… Upper opening, 13 …… Sub inlet, 14…
… Bottom opening, 15… Adjusting block

Claims (1)

[Scope of utility model registration request] 1. A pedestal having an arcuate side surface circumscribing a bottom plate of a main manhole main body, the upper surface of which is a downward slope toward the bottom plate, and an opening of an L-shaped bent pipe is buried so as to face the upper surface and the side surface. A curved pipe block whose side surface is an arc surface circumscribing the main manhole main and a bottom is provided with a downward slope toward the main manhole main, and a straight pipe installed between the L-shaped curved pipe and the inflow pipe to the main manhole main. The structure of the auxiliary inflow pipe for the manhole, which is composed of a control block with an arc surface circumscribing the main manhole main pipe and a through hole that fits the straight pipe in the center.