JPS59228537A - Method and apparatus for regulation of flow rate in manhole - Google Patents

Abstract

PURPOSE:To permit the storge of an increment of water in the inflow pipe on the upstream side and the upstream side pipe connected to the inflow pipe by erectly providing a partition plate with an orifice to the invert of the bottom of a manhole. CONSTITUTION:A partition plate 12 with an orifice 11 is erectly provided to the invert 10 of the bottom of a manhole 1. Water coming from an inflow pipe 8 into the manhole 1 is once stopped by partition plate 12 and flowed in a fixed from the orifice 11 at the lower part of the partition plate 12. In case where the amount of water is abruptly increased by rain fall, an increment of water in the inflow pipe 8 on the upstream side and the upstream side pipe connected to the inflow pipe is allowed to store in these pipes. Also, a screen 13 is attached with a spacing to the side of the partition plate 12 to remove out foreign matters in flowing water to close the orifice 11.

Description

Detailed Description of the Invention The present invention provides a manhole in which a pair of inflow pipes and an outflow pipe are attached to the side walls, respectively, by adjusting the amount of water flowing into the manhole from the inflow pipe so that a fixed amount of water is always supplied to the outflow pipe. This invention relates to a completely new method and device for regulating the flow rate in a manhole that allows water to flow, and more specifically, the inflow pipe and the outflow pipe are provided in a frame block or a straight wall pipe, respectively, and an invert is provided in the inner bottom. In a manhole, an orifice (3
) This invention relates to a flow rate adjustment method and device for a single manhole, which makes it possible to adjust the flow rate by installing a single partition plate at the bottom inside the manhole.

In particular, the present invention provides a partition plate with an orifice (water hole) for flowing water at the bottom upright on the outflow side of the manhole invert, thereby adjusting the amount of water flowing in from the inflow pipe and constantly As well as ensuring a constant flow and amount of water,
If the amount of water increases suddenly, increase the amount to the upstream inflow pipe and add 1
This water can be stored in the pipe, and the inflow pipe and the continuous upstream pipe are used as the infiltration pipe, and the height of the partition plate in the manhole is set higher than the top of the upstream pipe. In some cases, the water flowing out from the permeation hole of the permeation pipe is gradually infiltrated into the crushed stone element layer provided in advance around the permeation pipe,
(4) It has the feature of being able to store a large amount of water.

An embodiment of the device according to the present invention will be specifically described with reference to the drawings, and a flow rate adjustment method using this device will be explained. 1 is a manhole body, a bottom plate 2, a frame block 6, a straight wall pipe 4, and an inclined wall pipe. 5. It is composed of a lid receiving frame 6, a lid 7, etc., and an inflow pipe 8 of the upstream side pipe and an outflow pipe 9 of the downstream side pipe are respectively attached to the frame block B, and one invert pipe is installed at the bottom of the manhole body 1. A T-shaped partition plate 12 having an orifice 11 for flowing water at the lower part is installed upright near the outflow pipe 9 of 10. As shown in the figure, this partition plate 12 is configured to have a height higher than the top of the inflow pipe 8, and along the inflow pipe 8 side of this partition plate 12, screens 13 are arranged at a predetermined interval. is dammed (5).

The device according to the present invention is constructed as described above (as described above), since the one partition plate 12 having the orifice 11 is erected on the invert 10 at the bottom of the manhole body 1, the water flowing into the manhole body 1 from the inflow pipe 8 This partition plate 12 is responsible for blocking the water, allowing a certain amount of water to flow from the orifice 11 at the bottom of the partition plate 12, and when the amount of water increases suddenly due to rainfall, the upstream inflow pipe 8 and Continuing from this, the increased amount of water can be automatically stored in one upstream pipe (not shown).

In addition, in the device of the present invention, the partition plate 12 is installed on the outflow pipe 9 side of the manhole body 1, and the screen 16 is attached to the side of the partition plate 12 with a predetermined gap maintained, so that there is no water in the flowing water. (6) It protects the foreign matter contained in the manhole, prevents the orifice 11 from being blocked by the foreign matter, and allows the foreign matter to be easily removed, making maintenance inside the manhole extremely easy.

In the above embodiment, the screen 16 is attached along the side surface of the partition plate 12 as shown in FIG. 4(A).

Although various configurations can be considered as shown in +13+, in general, the surface area of the fleece 160 is as thick as possible, and a predetermined gap is formed between the partition plate 12 and the screen 16. Further, in the above embodiment, for example, as shown in FIG. A crushed stone filter element (7) 15 is constructed around the inflow pipe 8 and the upstream pipe along with the permeation pipe having the permeation hole 14, and the height of the partition plate 12 is equal to the height of the element 15 by y. Comb 1 In this case, a large amount of flowing water can be stored in these elements 15, and therefore the amount of flowing water is reduced. A fixed amount of water can always be supplied to the outflow pipe 9.

Since the method and apparatus according to the present invention have the above-mentioned configuration,
By carrying out the present invention, it is possible to constantly supply a fixed amount of water flowing into the manhole main body to the outlet pipe on the downstream side, and to prevent clogging of the orifice due to foreign matter contained in the flowing water, as well as foreign matter adhering to the screen. It can be easily removed to make maintenance inside the manhole extremely easy, and when there is a large amount of water flowing during rain, etc., this water can be automatically stored in the upper (8) downstream pipe. In the past, if the upstream pipe was used as a permeation pipe and a permeation layer made of crushed stone filter elements was constructed around it, a large amount of water could be stored in this permeation layer, and this water storage could be used as needed. It has features such as being able to be used with reverse flow.

[Brief explanation of drawings]

Figures 1 to 6 are explanatory diagrams of the device of the present application, and Figures 4 and 5 are
Each figure is an explanatory diagram of a specific example or the other side of the device of the present invention. 1 is the manhole body, 6 is the frame block, 5 is the inclined wall pipe, 8 is the inflow pipe, 9 is the outflow pipe, 1° is the invert,
11 is an orifice, 12 is a partition plate, 16 is a screen, 14 is a penetration hole, and 15 is an element. (9) Figure 1 7 Figure 2 (A) (B)

Claims (5)

[Claims] (1) In a manhole in which an inflow pipe and an outflow pipe are installed in a building block or a stone wall pipe, and an invert is provided in the inner bottom, a partition plate with an orifice at the bottom that allows a predetermined flow rate to pass through at all times is installed. A flow rate adjustment method in a manhole that makes it possible to adjust the flow rate by installing a dam inside the manhole. (2) In a manhole body in which an inflow pipe and an outflow pipe are provided in a frame block or a straight wall pipe, and an invert is provided in the inner bottom, a partition plate having an orifice (1) for flowing water in the lower part is installed in the invert. 1. A flow rate regulating device in a manhole, characterized in that the device is installed upright in a manhole, and a screen is attached to the upstream side of the partition plate. (3) The flow rate regulating device in a manhole according to claim 2, wherein the height of the partition plate is higher than the top of the upstream pipe. (4) A flow rate regulating device in a manhole according to claim 2, characterized in that a screen having a large area is attached to the upstream side of the partition plate with a predetermined gap maintained therebetween. (5) In a manhole body that has an inflow pipe and an outflow pipe installed in a frame block or a direct pipe and an invert formed at the inner bottom, a partition plate formed by drilling an orifice for flowing water in the lower part is inverted. Upright installation (2) and the inflow pipe or the upstream pipe connected thereto is formed by a permeation pipe having permeation holes, and furthermore, a V-permeable filter made of crushed stone filter element etc. is formed around these permeation pipes. A flow rate regulating device in a manhole, characterized in that the entire structure is composed of layers.