JPH0374297B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to equipment for efficiently and consistently removing fine sediment such as volcanic ash deposited in roadside gutters.

[Conventional technology]

Areas near active volcanoes are suffering from volcanic ash fall. Volcanic ash is mainly fine particles of 50 to 300 microns with hygroscopic properties, and when it falls or after ash falls, dust is thrown up under clear skies and causes great damage to people's lives and crops, and when it rains, it becomes dusty with high humidity. It flows out, enters the roadside gutter, and accumulates inside the gutter. Once volcanic ash and the like accumulate in the gutter and become stagnant, simply passing water through the gutter will not allow the accumulated ash to flow down at all, and the accumulation will progress further.

Conventionally, in order to remove accumulated sand in side gutters, methods such as removing the gutter cover and removing the ash manually, or flushing away with a jet of high-pressure jet water were used.

[Problem that the invention seeks to solve]

However, the conventional method described above requires a huge amount of work, work costs, and amount of water to be treated, making it extremely uneconomical. In addition, volcanic activity occurs irregularly, making it difficult to respond quickly. The points were also hot.

The present invention solves these problems and provides a consistent sand removal facility that can quickly capture and collect accumulated sand in side gutters, including volcanic ash, as soon as ash begins to fall.

[Means for solving problems]

The present invention lays a vibrating water pipe that discharges water for fluidizing accumulated sand on the upstream side of the side gutter, connects the downstream side of the side gutter to a solid-liquid separation tank, and cleans water from the solid-liquid separation tank. Connect the outlet to the gutter further downstream,
The sand removal equipment is characterized in that it is equipped with a manhole pump unit for supplying water to the vibrating water pipe.

[Effect]

The present invention uses the means described above to fluidize accumulated sand in the side gutter by sending water to the upstream side of the gutter with a vibrating water pipe installed in the gutter, and vibrating the vibrating water pipe while discharging water at its end. can be done. Once the accumulated sand becomes fluidized, even if the slope is small, if you continue to flow a small amount of water into the gutter, the accumulated sand can be easily flushed away. The sand and water flowing down in this manner enter the solid-liquid separation tank and undergo solid-liquid separation, and the sand settles and accumulates at the bottom of the solid-liquid separation tank. After most of the sand has been separated in the solid-liquid separation tank, the clean water flows further downstream into the gutter, and the sand that has accumulated at the bottom is appropriately discharged to the outside.

The manhole pump unit is for supplying water for fluidization to the vibrating water pipe, and can be installed completely independently. If it is arranged so that it also flows into the pump unit and is recovered, this recovered water can be circulated and supplied from the manhole pump unit to the vibrating water pipe again, so that water for fluidization can be saved. Furthermore, in this case, if rainwater or the like is stored in the solid-liquid separation tank and the manhole pump unit in advance, there is no need to use groundwater or tap water.

In this way, since the accumulated sand in the side gutter can be deposited all at once in the solid-liquid separation tank, it is no longer necessary to remove the ash by removing the gutter cover as in the past, and work efficiency is dramatically improved. Furthermore, if such equipment is started at the same time as ash begins to fall, a large amount of ash will not accumulate in the gutters, and accumulated sand will always be removed as it flows down the gutters, ensuring that the gutters are always clean. It is maintained. However, it goes without saying that the same effect can be achieved even if the system is activated after a considerable amount of ash has accumulated in the gutter.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

A side ditch 1 that is provided almost continuously along a road (not shown) has accumulated sand 32 at an upstream point 2.
A water pipe 26b is installed which has a water outlet 31 at its end for flowing water, and this water pipe 26b has valves 2 near both ends on the upstream and downstream sides within the gutter 1.
8 and 29 and flexible tubes 27 and 30 are provided so that they can easily vibrate within the side gutter 1. Water pipe 26
As b, a plurality of outlet ports 31 provided along the side gutter 1 or a porous pipe can be used, the number can be increased to a plurality, and a plurality of flexible pipes are connected as appropriate. You can also use

This water pipe 26b discharges water from the outlet 31 and vibrates to promote fluidization of the accumulated sand 32.A vibrating device for vibrating the water pipe 26b may be attached to the water pipe 26b. However, the energy of the fluid itself flowing in the water pipe 26b can be used as the vibration source. That is, an appropriate number of bends (not shown) may be provided in the water pipe 26b between the valves 28 and 29, or a fluid vortex generating mechanism (not shown) may be provided in a portion of the water pipe 26b. or if these are installed together, when water flows inside the water pipe 26b,
vibrates.

Further, the intermediate point 4 of the side gutter 1 is connected to the inflow path 6 of the solid-liquid separation tank 5, and the clean water 43 flowing out from the clean water outlet 12 of the solid-liquid separation tank 5 flows through the clean water flow path provided on the outer periphery. 13 and the outflow path 7, and then flows back into the side gutter 1a at a downstream intermediate point 8. Further, the side gutter 1a is connected to the inlet 10 of the manhole pump unit 9 and also to the side gutter 1b at the downstream point 3.

A submersible pump 18 driven by a submersible motor 17 is installed inside the manhole pump unit 9, and a suction bell mouth 19 is open.
The submersible motor 17 and the submersible pump 18 are integrally constructed, and are suspended from the manhole 20 of the manhole pump unit 9 with a tie 21 and set in the attaching/detaching device 22, which is fixed to the bottom plate 24 by legs 23. It also holds the pumping pipe 25. In addition, after the pumping pipe 25 passes through the manhole pump unit 9, it is connected to the water distribution pipe 26a.
The water pipe 26a is led to the side gutter 1 and connected to the water pipe 26b via a flexible pipe 27 and a valve 28.

Note that the number of pumps installed in the manhole pump unit 9 may be plural, or if the pump is portable, one pump may be installed in common with several other manhole pump units. You can also do it. The pump installed in the manhole pump unit 9 may be one that has a mechanism for stirring and sucking sand (a so-called sand pump).If this pump is used, when a small amount of sand gets mixed inside, The secondary effect of cleaning the inside can also be expected.

Further, as the solid-liquid separation tank 5 described above, various types of well-known types can be used, but as shown in the illustrated example, the tank body is made into a cylindrical shape, and the inlet passage 6 leading to the side gutter 1 is formed. An inverted conical intermediate floor plate 36 with an opening 39 in the center is provided in the tank, with an opening in the tangential direction of the tank body so that the water flowing down from the side gutter 1 generates a circumferential flow 35 in the tank, It is preferable to have a structure in which the upper part is divided into a secondary flow generation chamber 37 and the lower part is divided into a deposition chamber 38.

In addition to this, the structure of the solid-liquid separation tank 5 may be the same as those shown in FIGS. 7 to 9, in which only the main parts are simplified.

That is, as shown in the seventh illustrated example, the intermediate floor plate 36a is not integrated with the tank wall but has a separate structure, and the intermediate floor plate 36a is made removable. Removal work becomes easier.

In the eighth illustrated example, the deposition chamber 38 has a double structure with the inner wall 14a, and the intermediate floor plate 36b, the inner wall 14a, and the tank wall are all separate structures, and the intermediate floor plate 3
6b and the inner wall 14a are made removable. With this structure, when the amount of deposited in the deposition chamber 38 increases, the action of removing the deposited layer 42 can be facilitated by lifting up the intermediate floor plate 36b and the inner wall 14a, respectively.

Further, the ninth illustrated example is the inner wall 14a of the eighth illustrated example.
The inner wall 14b is made of a flexible material such as slat, and the inner wall 14b is integrally constructed with the intermediate floor plate 36c. With this structure, the deposition chamber 38
If the intermediate floor plate 36c and the inner wall 14b are pulled up together when the amount of accumulated layer 42 increases,
The removal work becomes easier.

In the figure, 11a is the liquid level in the solid-liquid separation tank 5, 11b
is the liquid level in the manhole pump unit 9, 44 is a side gutter cover, 45 is a solid-liquid separation tank cover, 46 is a manhole pump unit cover, 47 is the ground, and 50 is flowing sewage.

As described above, at least the vibrating water pipe 26b for fluidizing accumulated sand in the side gutter 1 and the solid-liquid separation tank 5 are considered as one set, but the range of this one set is the same as that of the side gutter 1 in FIG. It refers to the section of length L from upstream point 2 to downstream point 3 of 100 m.
The following are realistic.

First, the situation during normal rain without ash fall will be explained with reference to FIGS. 1 to 3.

Rainwater flows down the side gutter 1, enters the solid-liquid separation tank 5 from the inflow path 6, fills it with water, and enters the clean water flow path 13 through the clean water outlet 12 while maintaining the liquid level 11a. The water that has entered the clean water channel 13 flows down to the flow channel 7, flows into the side gutter 1a, flows down into the downstream side gutter 1b, and also flows into the inlet 10 of the manhole pump unit 9, and flows into the inside of the manhole pump unit 9. is filled with water, and the water level becomes 11b.

In this way, during normal rainfall in the absence of ash fall, rainwater fills the solid-liquid separation tank 5 and the manhole pump unit 9, but even if the rain stops and the weather continues to be sunny, the rainwater will not fill up. It will be kept as is.

Next, a procedure for removing ash when volcanic ash or the like is deposited at the bottom of the side gutter 1 during ash fall, resulting in a stagnant state, will be described.

Before starting ash removal work, as shown in Figure 5,
At the bottom of the gutter 1, there is accumulated sand 32 such as volcanic ash. Then, when the submersible motor 17 of the manhole pump unit 9 is started, the water sucked from the suction bell mouth 19 of the submersible pump 18 passes through the pumping pipe 25, the water pipe 26a, and the water pipe 26b, and from the outlet 31 to the side gutter 1. The water is discharged near upstream point 2. At this time, since the water pipe 26b vibrates at the same time, as shown in FIG.
Vibration like an arrow occurs around point b, and a fluidized region is formed. Furthermore, since the flowing water 50 is formed in the side gutter 1 at this time, the fluidized area also flows down easily, becoming a suspended state and forming the side gutter 1.
flows down, and flows into the solid-liquid separation tank 5 from the inflow path 6 as a circumferential flow 35.

The circumferential flow 35 that has flowed into the solid-liquid separation tank 5 is
While flowing circumferentially inside the secondary flow generation chamber 37, sand settles on the upper part of the intermediate floor plate 36 and forms a thin layer of sand, but due to the secondary flow generated at the same time, the thin layer of sand flows through the opening. 39 and settles and falls from the opening 39 into the deposition chamber 38 to form a deposited layer 42. The clean water 43 after sand and the like have been separated in the secondary flow generation chamber 37 flows out from the clean water outlet 12 into the clean water channel 13. This clean water 43 flows inside the clean water channel 13, reaches the outflow channel 7, flows into the manhole pump unit 9 from the inlet 10 via the side gutter 1a, is collected, and is sent to the water distribution pipe 26b as described above. and used in circulation.

In addition, as time passes, accumulated sand 32 in the side gutter 1
is collected in the solid-liquid separation tank 5, so the solid-liquid separation tank 5
The proportion of water in the water has no choice but to gradually decrease,
This excess water flows down the side gutter 1b. Also,
The deposited layer 42 in the deposition chamber 38 of the solid-liquid separation tank 5 is appropriately taken out and disposed of.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to efficiently, quickly and easily consistently remove fine accumulated sand in side gutters, and to keep the side gutters clean at all times.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is a sectional view taken along the line X-X in FIG. 1, and FIG.
The figure is a cross-sectional view taken along the Y-Y line in Figure 1, Figure 4 is a cross-sectional view taken along the Z-Z line in Figure 1, Figures 5 and 6 are cross-sectional views of the gutter, and Figures 7 to 9 are solid-liquid separation. FIG. 3 is an explanatory cross-sectional view showing various structural examples of the device. 1, 1a, 1b...Gutter, 2...Upstream point, 3
...Downstream point, 4...Intermediate point, 5...Solid-liquid separation tank, 6...Inflow channel, 7...Outflow channel, 8...Intermediate point, 9...Manhole pump unit, 10...
Inlet, 11a...liquid level in solid-liquid separation tank, 11b
...Liquid level inside the manhole pump unit, 12...
...Clean water outlet, 13...Clean water flow path, 14a, 1
4b... Inner wall, 17... Submersible motor, 18... Submersible pump, 19... Suction bell mouth, 20... Manhole, 21... Chain, 22... Attachment/detaching device,
23... Leg, 24... Bottom plate, 25... Lifting pipe, 2
6a, 26b... Water pipe, 27... Flexible pipe, 2
8, 29... Valve, 30... Flexible pipe, 31... Outflow port, 32... Sand accumulation, 35... Circumferential flow, 36,
36a, 36b, 36c... intermediate floorboard, 37...
Secondary flow generation chamber, 38... Deposition chamber, 39... Opening, 42... Sediment layer, 43... Clean water, 44...
Gutter cover, 45... solid-liquid separation layer cover, 46... manhole pump unit cover, 47... ground, 50...
Flowing sewage.

Claims (1)

[Scope of Claims] 1. A vibrating water pipe for discharging water for fluidizing accumulated sand is laid on the upstream side of the side gutter, and the downstream side of the side gutter is connected to a solid-liquid separation tank, and the solid-liquid separation A stagnant sand removal equipment, characterized in that the clean water outlet of the tank is connected to a gutter further downstream, and a manhole pump unit is provided for supplying water to the vibrating water pipe. 2. The sediment removal equipment according to claim 1, wherein the vibrating water pipe is configured to vibrate due to the energy of the fluid. 3. The solid-liquid separation tank has a cylindrical shape, and the connection part with the side gutter is tangential to the tank, and the inside of the tank is vertically separated by an inverted conical intermediate floor plate with an opening in the center. The accumulated sand removal equipment according to claim 1 or 2, which is divided into sections. 4. The sediment removal device according to any one of claims 1 to 3, wherein the manhole pump unit is connected to a side gutter connected to a clean water outlet of the solid-liquid separation tank.