JP4594014B2 - Manhole and water shield used in the manhole - Google Patents

Description

  The present invention temporarily stores water flowing in from a manhole having a vertical drop-type flow path connecting a water intake channel and a water discharge channel with a drop or a connected water supply channel, and discharges it with a pump as needed. The present invention relates to manholes and water shielding plates used in those manholes.

Between channels having a drop, a channel at a high position and a channel at a low position may be connected by a channel.
The flow path for connection is generally a vertical drop type, and the flow path is called a drop shaft because water is dropped vertically.
Although the drop shaft is sometimes buried in the soil, it is often placed in a manhole in consideration of maintenance, and a general-purpose pipe made of vinyl chloride or the like is adopted for the drop shaft.
However, when the head exceeds 10 m, as disclosed in Patent Document 1, the use of a double pipe having a spiral groove inside is proposed.
And the drop shaft arranged in the manhole connects the upper end to the channel at the higher position and releases the lower end from the bottom of the manhole, so that the water flowing in from the channel at the higher position can be removed from the bottom of the manhole. The water accumulated in the manhole is pumped out to a low flow path connected to the lower side of the manhole, and the water temporarily stored is drained by a pump as needed.

JP 2002-122283 A

In the manhole, the drop shaft protrudes from the inner wall surface, creating a dead space, making it difficult to install and maintain in the manhole, and even observing the inside of the pipe.
In addition, pipes connected via elbows or the like may not be able to take out foreign substances clogged in the elbow portions, and may need to be replaced together.
On the other hand, in the underground buried type, the space in the manhole is not occupied by the pipe, but the workability is poor because the pipe itself has to be dug up against the clogging of foreign matter.

The present invention relates to a manhole that is improved in workability by almost eliminating dead space, and the configuration thereof is a manhole provided with a water inlet at a high position on the inner wall surface, and is located below the water inlet. In the horizontal section, in the horizontal section, the water shielding plate bulges in the center on the opposite side to the mounting surface with respect to the inner wall of the manhole, and is curved in an arcuate shape, and is provided with fastening wings on both sides. the portion excluding, by Rukoto vertically arranged with the reinforcing ribs plural rows in the horizontal direction of the water shield plates at regular intervals in the vertical direction of the manhole, sandwiched between the inner wall surface and its impervious plate, A manhole that forms a vertical flow path that communicates with the water inlet, and a water shielding plate that is arranged vertically in the manhole and forms a vertical flow path in combination with the inner wall surface of the manhole, with the manhole at the center in the horizontal cross section Curved bow on that bulges to the side opposite to the mounting surface with respect to the inner wall, provided with a fastening wings on both sides, the water shield the portion excluding the該止adhesive wings, at equal intervals in the vertical direction of the manhole The water shielding plate is provided with a plurality of reinforcing ribs in the horizontal direction of the plate.

  And the said water-shielding board can be comprised with the several plate connected to an up-down direction, and it is desirable to provide an inspection window in the upper part.

Since the water shielding plate is attached so as to stick to the inner wall surface of the manhole, it does not get in the way like a drop shaft, and the space occupation rate in the manhole is small, so a wide working space is secured.
Since the vertical flow path is formed by effectively using the inner wall surface of the manhole, installation and maintenance are easy.

A manhole and a water shielding plate according to the present invention will be described with reference to the drawings.
First, the water shielding plate 1 used for forming the flow path will be described with reference to FIG. 1. In this embodiment, as shown in FIG. 1 (a), three plates 1a, 1b, 1c are vertically arranged. Concatenated.
Each plate 1a, 1b, 1c is made of synthetic resin, and its horizontal cross section has a shape protruding in a trapezoidal shape toward the front (opposite side of the mounting surface with respect to the inner wall of the manhole). The stationary wings 2 and 2 are extended along the edge.
Screw holes 3, 3... Are formed in each fixing blade 2, 2..., And a plurality of reinforcing ribs 4, 4. Is provided.
There are two types of plates 1a, 1b, and 1c. A window-type plate 1a having a large circular inspection window 5 is at the top, and a windowless type plate 1b, 1c is below it. Are connected in order.
As shown in FIG. 1 (b), the plates 1a, 1b, and 1c are arranged such that the upper edge of the lower plate is overlapped with the surface of the lower edge of the upper plate, and the screw holes coincide with each other. To be connected.

It should be noted that it is desirable to form stepped portions that fit and fit to each other when overlapped on the upper and lower edges of each plate.
Each plate does not have to be the same height, and it is possible to combine multiple height plates and adjust them to the desired height. Can be removed or cut off.
The stationary wings 2 and 2 on both sides are angled so as to be slightly bent forward so as to be easily adapted to the curved shape of the inner wall of the manhole, but this is not necessary for a square manhole.

FIGS. 2 (a) and 2 (b) show a manhole to which the water shielding plate 1 of the present invention is attached. The manhole 6 has an entrance 6a opened directly above, and the inner wall surface is a footrest. Steps 7, 7 ... are equipped.
The surface on which the step 7 is equipped extends right below the inner peripheral edge of the doorway 6a, but the other inner wall surfaces bulge outward from the doorway 6a, and the entire manhole 6 has a bottle shape, The bottom surface is larger than the opening area of the entrance 6a.

The inlet 8a formed at a high position on the inner wall facing the surface on which the step 7 is equipped is connected to a water inlet pipe 8 constituting a flow path at a high position, and the inner wall surface on which the step 7 is equipped. A flowing water pipe 9 constituting a flow path at a low position is connected to the outlet 9a formed in the lower part of the outlet.
And the water shielding board 1 is attached to the inner wall facing the surface in which the step 7 is equipped.
The water shielding plate 1 is positioned vertically below the inflow port 8a so that the inspection window is positioned on the extension of the water inlet pipe 8 and the lower end is floated from the bottom of the manhole 6, and both sides are stopped. The landing blades 2, 2... Are fixed to the wall surface by screwing via fastening members 1d, 1d,.
As a result, the water flowing in from the water inlet pipe 8 falls into the manhole 6 vertically through the gap between the inner wall surface of the manhole 6 and the water shielding plate 1 and flows along the bottom surface to the drain pipe 9 at once. 10 is formed.

The water shielding plate 1 is provided with an opening / closing lid attached to the inspection window, thereby preventing the water flowing in from the water inlet pipe from being blown out.
For example, as shown in FIG. 3, the opening / closing lid is attached by attaching a plate-like lid body 11 that closes the inspection window 5 so that it can rotate around a fulcrum shaft 11 a provided at one position of the opening edge of the inspection window 5. If necessary, the state inside the water inlet pipe 8 can be observed by opening the knob 11b.
Since the water shielding plate 1 is installed so as to stick to the wall surface, a wide working space without protruding objects can be secured in the manhole 6, and if the upper surface remains open, it can be easily removed even if foreign matter is clogged.

In the above embodiment, since the water shielding plate is configured to connect a plurality of plates, it is easy to carry in the manhole in the state of the divided plates, and the installation work can be performed smoothly, but it is formed with a single plate. It is also possible to adopt a vertical sliding inspection window, change the position of the inspection window, or omit the inspection window.
In principle, the water shielding plate is arranged vertically below the water inlet, but if it is covered up to the extension of the water inlet as in the embodiment, even if water flows in vigorously, it will be outside the water shielding plate. Since it can be prevented from splashing, it is considered substantially the same even if it is installed so as to cover the upper part of the water inlet.

In addition, although the horizontal surface of the water shielding plate of the embodiment protrudes in a trapezoidal shape, it can be curved in a bow shape or provided with a taper that spreads in the vertical direction.
The material of the water shielding plate can be made of metal other than synthetic resin, for example, and the mounting means can be bonded in addition to screwing, or a slide-type holder is provided in advance on the inner wall surface of the manhole. The fixing wings may be inserted into the holder and attached to the holder.
In addition, the water shielding plate of the present invention temporarily stores water flowing in from a connected water inlet as well as a manhole having a vertical drop-type flow channel connecting a water inlet and a water outlet with a drop. It is also applied to manholes that are placed and discharged by a pump as needed.

(A), (b) is explanatory drawing which showed the Example of the water-shielding board based on this invention. (A), (b) is explanatory drawing which shows the manhole which has the flow path using a water shielding board. It is explanatory drawing which showed the inspection window with a lid | cover.

Explanation of symbols

  1 .. Water shielding plate, 1 a, 1 b, 1 c .. plate, 1 d .. fastening member, 2 .. fastening blade, 3 .. screw hole, 4 .. rib, 5 .. inspection window, 6. Manhole, 6a ··· Entrance, 7 ··· Step, 8, Inlet pipe, 8a ··· Inlet, 9 ··· Inlet pipe, 9a ··· Outlet, 10 ·· Channel, 11 ·· Lid, 11a ··· A fulcrum shaft, 11b.

Claims (4)

In a manhole equipped with a water inlet at a high position on the inner wall, a water shielding plate is swelled in the horizontal section in the part below the water inlet , and the center bulges away from the mounting surface for the inner wall of the manhole. It is curved in the shape of an arc, and is provided with fastening wings on both sides, and a plurality of reinforcing ribs are provided in the horizontal direction of the water shielding plate at equal intervals in the vertical direction of the manhole in the portion excluding the fastening wings. by Rukoto disposed vertically Te, the barrier is sandwiched between the inner wall and the water plate, before entry manhole forming a vertical channel communicating with the water inlet. A water shielding plate that is vertically arranged in the manhole and forms a vertical flow path in combination with the inner wall surface of the manhole,
In horizontal section, the center is curved arcuately on that bulges to the side opposite to the mounting surface against the inner wall of the manhole, equipped with fastening wings on either side, a portion excluding the該止adhesive wings, vertical of the manhole A water shielding plate provided with a plurality of reinforcing ribs in the horizontal direction of the water shielding plate at equal intervals in the direction .   The water-impervious plate according to claim 2, comprising a plurality of plates connected in the vertical direction.   The water shielding board according to claim 2 or 3, wherein an inspection window is provided at an upper part.

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