JP3526191B2 - Dust removal system for drainage system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage system for draining river water by providing a bypass waterway in the river, and particularly,
The present invention relates to a dust removal equipment for a drainage system for preventing dust from flowing into a pump of a drainage pump station provided in a bypass waterway.

[0002]

2. Description of the Related Art Heretofore, as a known technique relating to this type of dust removing equipment for collecting dust in a waterway, for example, Japanese Patent Laid-Open No.
2-242003 and JP-A-6-136729. In Japanese Patent Laid-Open No. 62-24003, a flow channel is branched to form a main flow channel and a branch flow channel, and a screen is arranged at the main flow channel inlet at the branch portion. Then, the dust collected on the screen is scraped off by a dust sweeper provided on the side of the dividing flow path, and the scraped dust is collected by a dust collecting box provided on the downstream side of the dividing flow path.

In Japanese Laid-Open Patent Publication No. 6-136729, a floating guide line for collection, one end of which can be wound up and out by a drum, is arranged diagonally across the river, and floating matter flowing in the river is floated. Collect with a guide rope float and a collecting screen. Then, while adjusting the tension so that the curved guide vertices due to the flowing water pressure do not occur in the floating guide rope, the collected dust is guided along the floating guide rope to the downstream drum winding position side, and from the vicinity of the drum winding position. It is designed to be guided to a dust collection tank through a branching water conduit to collect dust.

[0004]

However, the above-mentioned conventional techniques have the following problems.

Generally, the dust trapped on the screen is
It is in a state of being strongly pressed onto the screen by the flowing water pressure passing through the screen. Therefore, in order to scrape off the dust on the screen with a mechanical external force as disclosed in JP-A-62-24003,
It is necessary to scrape off against the frictional force due to this strong pressing force, and sometimes a force of several tons or more is required. In addition to the magnitude of the pressing force by running water, this frictional force also depends on the coefficient of friction between the dust and the screen, but dust is a driftwood, a water mica, plastics, etc.
It has a wide variety of shapes and in some cases the coefficient of friction can be very large. Therefore, in practice, it is difficult to completely scrape off the dust trapped on the screen. At this time, in Japanese Patent Laid-Open No. 62-24003, the dust trapped on the main waterway inlet screen is
Since the blades attached to each part of the annular chain of the dust collector scrape off the dust, for example, the local frictional force of the dust trapped in the main waterway screen becomes extremely large, and If the dust cannot be scraped off and is caught, all other blades connected by the chain will also stop.
That is, since all the dust removing operations are stopped, dust particles may be deposited on the screen to obstruct the water flow, and the water flow in the main water channel may be reduced. Therefore, when this conventional technique is applied to the drainage system, the water permeability of the bypass waterway may be reduced, and it becomes difficult to maintain good drainage performance of the drainage system.

Further, in Japanese Unexamined Patent Publication No. 6-136729, similarly to the above, the dust collected once by the collecting screen is in a state of being strongly pressed onto the collecting screen by the flowing water pressure of the river. However, even if the tension is adjusted so that no curved apex occurs, it is difficult to guide the dust along the floating guide rope. Therefore, it is difficult to guide a sufficient amount of dust from the headrace to the dust collection tank, and as a result, dust accumulates on the collection screen, obstructing water flow and reducing water flow in the river. there's a possibility that. Therefore, when this conventional technique is applied to the drainage system, the water permeability of the bypass water channel may be reduced as described above, and it becomes difficult to maintain good drainage performance of the drainage system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drainage system dust removal equipment which can reliably prevent a decrease in water permeability of a bypass waterway and reliably maintain good drainage performance of the drainage system.

[0008]

(1) In order to achieve the above object, the present invention comprises a main waterway gate provided at a downstream portion of the main waterway, and a drainage pump branched from the main waterway. A detour water channel, and a dedusting screen means installed in a drainage system having a detour water channel gate provided at a downstream portion of the detour water channel to prevent inflow of dust to the downstream side provided in the detour water channel; In a dedusting equipment of a drainage system including a debris storage water channel for debris storage provided by branching from the vicinity of the installation position of the dedusting screen means of a bypass water channel, it is possible to float or settle near the downstream side of the dedusting screen means. A plurality of dust removal floating / sinking members, which are respectively provided and which, when sunk, prevent the flow of at least the surface layer of the flow passing through the dust removing screen means, and a plurality of dust removal floating / sinking portions. A plurality of driving means for respectively driving the floating and sinking directions, and a control means for controlling the operation of the plurality of driving means, and in the dust removing screen means, the waterway width from the bank on one side of the bypass waterway. The first portion, which is relatively far in the direction, has a flow direction position downstream from the second portion, which is relatively close in the waterway width direction from the shore on the one side. In case of flood such as heavy rain or typhoon, the main canal gate at the downstream of the main canal is closed and the detour canal at the downstream of the detour canal is opened, and the turbid water in the main canal is discharged by the drainage pump through the detour canal. Prevent flood damage in the basin. At this time, dust such as muddy water, wood, and plastic flows down in the main waterway together with the muddy water, flows into the bypass waterway from the main waterway, and is captured by the dust removing screen means. At this time, the dust generally has a smaller specific gravity than water and flows down the surface layer of turbid water due to buoyancy, so that it is trapped mainly on the upper part of the dust removing screen means. Here, in the present invention, the dust removing screen means is arranged such that the first portion far from the shore on one side is located on the downstream side of the second portion close to the shore, that is, from the shore. The farther away it is, the more downstream it is located. Further, in the present invention, a plurality of dust removing floating / sinking members driven in the floating / sinking direction by the driving means are provided in the vicinity of the downstream side of the dust removing screen means, and the operation of these driving means can be controlled by the control means. Therefore, first, the drive means is controlled by the control means to sink the dust removing floating / corresponding member corresponding to the portion closest to the shore of the dust removing screen means (that is, the uppermost stream side portion) and pass through the uppermost stream side portion. Stop at least the superficial flow of the flow. As a result, there is no surface layer flow that passes through the uppermost stream side portion, and the pressing force due to the water pressure that acts on the dust trapped in the uppermost stream side portion almost disappears, so the flow that flows along the uppermost stream side portion of the screen. Is induced. for that reason,
The dust trapped in the uppermost stream side portion by the fluid force of the flow along the screen is stripped from the uppermost stream side portion and flows along the screen in a direction away from the shore. In this way, the dust trapped on the most upstream side portion can be released from the screen. At this stage,
In the area outside the uppermost stream side part of the dust removing screen means, the corresponding dust removing floating / sinking member has not settled down, and the flow in each area is not dammed, so it is stripped from the uppermost stream side part as described above. The dust is captured again in a portion of the dust removing screen means that is adjacent to the uppermost stream side portion in the direction away from the shore (that is, downstream side). Next, similarly, the drive means is controlled by the control means to levitate the dust removal floating / sink member corresponding to the most upstream side portion to restore the normal water flow state in the most upstream side portion to secure the water flow. ,
The dust removing floating / corresponding member corresponding to the portion adjacent to the downstream side of the most upstream side portion is caused to sink. As a result, similarly to the above, the dust trapped in this portion is transferred to the screen portion adjacent to the further downstream side and trapped by using the fluid force. By repeating this procedure and sequentially sinking the dust removal floating / sinking member while ensuring the water passage area of the bypass water passage, the dust trapped in each part of the dust removal screen means is sequentially accumulated and moved to the downstream side. Finally, it can be finally captured in the most downstream portion farthest from the shore. Here, in the present invention, the dust storing water channel is branched from the vicinity of the installation position of the dust removing screen means. Therefore, when the dust particles are accumulated in the most downstream side portion of the dust removing screen means as described above, the driving means is controlled by the control means in the same manner as described above to remove dust corresponding to the most downstream side portion. Settle the floating member. As a result, it is possible to separate the dust trapped in the most downstream side portion and introduce it into the dust storage water channel, so that all the dust trapped over the entire width of the dedusting screen means flowing down the bypass water channel to the dust storage water channel. Can be guided, accumulated and stored.

(2) In the above (1), preferably,
The control means causes the plurality of dust removal floating / sinking members to sink in order from one on one end of the bypass water channel,
Control the corresponding drive means.

(3) In the above (1), and preferably, the dust removing screen means is provided in a substantially straight line so as to be oblique to the width direction of the bypass water channel.

(4) In the above item (3), more preferably, the dust removing screen means is provided in a substantially straight line form at an angle of 30 ° or more and 60 ° or less with respect to the width direction of the bypass water channel. There is.

(5) In the above (1), and preferably, the dust-removing screen means has a structure divided into a plurality of screens arranged at a plurality of positions in the width direction of the bypass water channel, and these screens have a structure. At least one
The two are arranged substantially parallel to the width direction of the bypass water channel.

(6) In the above (1), and preferably, water flow generating means for generating a water flow in the water area near the upstream side of the dust removing screen means is provided. Accordingly, when the dust removing floating / sinking member is caused to sink and the dust collected by the dust removing screen means is detached, the dust can be more effectively detached.

(7) In (1) above, preferably, the dust removing screen means has a structure divided into a plurality of screens arranged at a plurality of positions in the width direction of the bypass water channel, and each screen is A lifting means is provided for lifting the above the water surface. As a result, the frictional force of a captured dust becomes extremely large locally, and if the dust cannot be separated and remains locally, the lifting means pulls up the screen on which the dust remains on the water surface. By this, dust can be removed. Further, since it can be utilized for the periodical inspection of the screen, the maintainability can be improved.

(8) In the above item (1), and preferably, it further comprises an outflow prevention screen means provided in the dust storage water channel for preventing the outflow of dust to the downstream side,
Further, the downstream side of the outflow prevention screen means of the dust storage water channel is connected to a portion of the bypass water channel on the downstream side of the dust removal screen means. By providing the outflow prevention screen means, it is possible to prevent the dust introduced from the dust removal screen means into the refuse storage water channel from flowing into the bypass water channel when the flows merge from the dust storage water channel to the bypass water channel. .

(9) In the above item (8), more preferably, the outflow prevention screen means is provided in a substantially vertical direction and allows the flow to pass in a substantially horizontal direction, and a flow screen provided in a substantially horizontal direction to allow the flow. It has a horizontal screen that passes in a substantially vertical direction. As a result, when the flow merges from the dust storage water channel to the bypass water channel, the dust in the dust storage water channel is captured by both the vertical screen and the horizontal screen. At this time, it is generally difficult to increase the width of the dust storage water channel in order to increase the effective capture area by the vertical screen, but it is simply difficult to increase the effective capture area by the horizontal screen. Since it is sufficient to increase the length in the flow direction,
The effective capture area can be secured relatively easily. Therefore,
For example, if S is the effective capture area, Qg is the estimated maximum dust volume per flood, and Hg is the estimated deposition depth of dust, then S
By setting ≧ Qg / Hg, all the dust from one flood can be captured by the horizontal screen. At this time, even if all the dust is captured on the horizontal screen, water is still able to pass through the dust storage waterway, so the dust on the horizontal screen can be collected without pulling it up to the ground during the operation of the drainage pump until the flood ends. It is possible to achieve significant labor saving.

(10) In the above (9), more preferably, when the effective capture area of the horizontal screen is S, the estimated maximum dust volume per flood is Qg, and the estimated deposition depth of dust is Hg, The horizontal screen is constructed so that S ≧ Qg / Hg.

(11) In (8) above, preferably, the outflow prevention float is provided in the vicinity of the downstream side of the outflow prevention screen so as to be floatable and sinkable, and prevents the flow from the dust storage water channel to the bypass water channel. A member, a dust collecting means that is left on the upstream side of the outflow prevention screen means in the dust storing water channel and accumulates the dust introduced into the dust storing water channel, and the dust collecting means is the dust storing water channel. And a transfer reversing unit that transfers the film to the outside and reverses it. Thus, when the dust from the dust removing screen means is introduced into the dust storage water channel, the dust is smoothly introduced into the dust storage water channel without being dammed by the outflow prevention floating / sink member, and the dust is accumulated further. It can be led to a means and accumulated. When the accumulated dust is carried out of the waterway, the flow toward the detour waterway is stopped by the outflow prevention floating member, so that there is almost no flow in the dust storage waterway. Can prevent the transfer from being hindered.

(12) In the above (1), and preferably, the dust removing screen means is composed of a large number of parallel plates in a substantially horizontal direction.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG.

First, FIG. 2 is a layout plan view of a general drainage system of this kind in which the dewatering equipment according to the present embodiment is applied and a bypass waterway is provided in a river and a drainage pump station is installed in the middle of the bypass waterway.
Shown in. In FIG. 2, this drainage system has a main waterway gate 3 at a connection between a river 1 (or a waterway, the same applies hereinafter) that is a main waterway and a large river 2 (a large waterway or the ocean, which applies below) connected to the downstream side thereof. And the detour waterway 4 is opened. A drainage pump station 5 equipped with a drainage pump is provided in the middle of the bypass waterway 4, and the bypass waterway 4 and the large river 2 are further provided.
A detour waterway gate 6 is provided at the connection portion with. When a heavy rain or typhoon causes a flood, the main canal gate 3 is closed and the bypass canal gate 6 is opened to drain the turbid water of the river 1 into the major river 2 by the pump installed in the drainage pump station 5, which causes flood damage in the river 1 basin. To prevent. In such a drainage system, in order to prevent dust from floating and flowing down the river 1 from flowing into the drainage pump station 5 from the detour waterway 4 and damaging or blocking the drainage pump to prevent drainage operation, dust is captured. The dust removing equipment 100 according to the present embodiment equipped with a screen means (described later) is arranged near a branch portion where the bypass water channel 4 branches from the river 1 (or in the middle of the bypass water channel 4).

FIG. 1 shows a dust removing equipment 100 according to this embodiment.
3 is a plan view showing the entire structure of FIG. 3, FIG. 3 is an enlarged plan view showing the structure in the vicinity of the dust removing screen means 101 (described later) in FIG. 1, and FIG. 4 (a) is from the direction A in FIG. FIG. 4B is a view as seen from the arrow (excluding the pier), and FIG.
It is a cross-sectional view taken along the line BB. In these figures, the same parts as those in FIG. 2 are designated by the same reference numerals. 1 to 4, dust removal equipment 100
Is a horizontal screen 10 provided in the bypass water channel 4 as a dust removing screen means for preventing dust from flowing into the downstream side.
1, a dust storage water channel (bucket) 102 for storing dust, which is provided by branching from the vicinity of the installation position of the horizontal screen 101 of the bypass water channel 4, and is provided in the vicinity of the downstream side of the horizontal screen 101 so as to be able to float and sink, respectively. Movable weirs 103a and 103 as dust removing floating members that prevent at least the surface flow of the flow passing through the horizontal screen 101 in the sunk state.
b, drive means 104a and 104b for driving the movable weirs 103a and 103b in the floating and sinking directions respectively, control means 105 for controlling the operation of these drive means 104a and 104b, and water flow in the water area upstream of the horizontal screen 101. It is provided with four water flow generation means 106 to be generated, and an outflow prevention screen means 108 which is provided in the dust storage water channel 102 and prevents outflow of dust to the downstream side.

In the horizontal screen 101, the position in the flow direction is downstream of the portion relatively far from the shore on one side (the lower side in FIG. 1) of the bypass water channel 4 in the channel width direction. In particular, in this embodiment, the horizontal screen 101 is provided in a substantially straight line so as to cross at 45 ° with respect to the width direction (vertical direction in FIG. 1) of the bypass water channel 4, and the movable weir 103a is provided. , 103b on the front side (upstream side) of the channel. This angle is especially 4
Although not limited to 5 °, from the two viewpoints of efficiently removing dust trapped on the horizontal screen 101 and reducing the space for installing the dust removing equipment 100 as much as possible, The angle is preferably 30 ° or more and 60 ° or less. The horizontal screen 101 has a structure in which it is divided into two screens 101a and 101b (see FIG. 3). Each screen 101a, 101b
Is composed of a large number of parallel plates 109 (see FIG. 4) in a substantially horizontal direction, and has a function of trapping dust 110 in the submerged water flow of the movable weirs 103a and 103b. At this time, the mesh size of the parallel plate 109 has a risk that when the pump of the drainage pump station 5 sucks, rotation is hindered due to blockage of the pump impeller (or biting into the pump slit portion) and operation becomes impossible. It is set below a certain size.

At this time, as shown in FIG. 1, the bypass water channel 4 is generally (at least partially) partitioned by a center pier 4A into a plurality of (two in this embodiment) water channels 4a and 4b. There is. In response to this, the movable weir 1
The widths of the screens 03a, 103b and the screens 101a, 101b are adjusted to the widths of the water channels 4a, 4b.
The movable weir 103a is arranged on the back side (downstream side) of 1a, and the movable weir 103b is arranged on the back side (downstream side) of the screen 101b.
Is installed to facilitate the installation work. That is, one movable weir 1 is provided for each waterway 4a, 4b.
03a (or 103b) and the screen 101a (or 101b) are installed as one unit. further,
Each of the screens 101a and 101b has a winch 111 as a lifting means for lifting them above the water surface.
(See FIG. 4) is arranged, and when the dust cannot be removed and removed (described later), the movable weirs 103a and 103b
Is closed and the screens 101a and 101b are pulled up above the water surface so that the dust caught by the worker can be removed. The winch 111 can also be used for periodical inspection of the screen, and the maintainability can be improved.

In the dust storage water channel 102, the downstream side of the outflow prevention screen means 108 is connected to the portion of the bypass water channel 4 downstream of the horizontal screen 101, whereby the flow out of the dust waste water channel 102 is prevented. It joins the detour waterway 4 again.

An example of the structure of the movable weirs 103a and 103b is shown in FIG.
It shows in (a) and FIG.5 (b). FIG. 5A shows the movable weir 10.
3a (or 103b) as seen from the back, FIG.
5B is a transverse cross-sectional view taken along the line CC in FIG. 5A. As shown in FIGS. 5A and 5B, the movable dams 103a and 103b are rib structures, and include an outer frame 112 formed of, for example, a steel plate, a rib 113 for ensuring strength, and the like. The outer frame 112 and the rib 113 are composed of a smooth flat plate 117 fixed to the front surface side. As shown in FIG. 3, the movable weirs 103a and 103b are provided with a plurality of guide rollers 114L and 114R at both ends thereof. It is possible to move up and down smoothly by being guided by the guide rails 115 fixed to the dust storage water channel side pier 4C and traveling.
As a result, the frictional force due to the large water pressure applied to block the water flow and change the direction is reduced, and the driving means 104 is used.
The driving force of the movable dams 103a and 103b by a and 104b is designed to save energy.

The driving means 104a and 104b are respectively
As shown in FIGS. 4A and 4B, the movable weir 103
a drive motor 116 that generates a rotational force for vertically moving a and 103b and a ball screw shaft 118 that converts the rotational force from the drive motor 116 into vertical movement of the movable dams 103a and 103b. There is. The reason why the ball screw shaft 118 having a small friction coefficient is used is that the movable dams 103a and 103b are normally driven at a relatively high frequency and that a certain speed is required for driving. These driving means 104a,
Movable weirs 103a and 103 that move up and down by the driving force of 104b
The displacement of b is detected by the displacement detecting means 119 provided on the ball screw shaft 118 and transmitted to the control means 105. An example of the detailed configuration of the displacement detecting means 119 is shown in FIG.
Shown in.

In FIG. 6, a photoelectric sensor 120 is provided on the upper end of the ball screw shaft 118, and reflecting plates 121 are provided at a plurality of axial positions so as to face the photoelectric sensor 120 at predetermined intervals. And the reflection plate 12 by the photoelectric sensor 120
The position of the ball screw shaft 118 is detected by counting the 1 detection signal with a counter (not shown). At this time, a limit switch 122 for detecting that the ball screw shaft 118 has reached the upper limit position,
A limit switch 123 for detecting that the ball screw shaft 118 has reached the lower limit position is also provided, and these detection signals are also transmitted to the control means 105.

These limit switches 122, 12
3 is provided on the guide rail 115 described above, for example.

The control means 105 incorporates a predetermined electronic control circuit and is connected to the drive motor 116 by a signal cable (not shown). Also, this control means 105
In addition, detection signals from known water level detection means 124 and 125 (see FIG. 1) for detecting the water levels on the upstream side and the downstream side, respectively, and the displacement detection means 119 for detecting the height positions of the movable dams 103a and 103b. Detection signal from the movable weirs 103a, 10b by the drive motor 116 so that the plunging depth of the movable weirs 103a, 103b becomes substantially constant following the change in the water level on the upstream side.
Controls the vertical drive of 3b. As a result, the movable weir 103
The a and 103b are designed to stop at least the surface flow of the muddy water in the bypass water channel 4.

The constant plunge depth control at this time will be described with reference to FIGS. 7 and 8. That is, the movable weir 10
The depths of underwater thrusts for blocking the surface layer flows of 3a and 103b may not be so large that a difference in water level may occur, so that they are set by the following method, for example.

Generally, when the weir blocks the flow, a water level difference x occurs before and after the weir as shown in FIG. It is known that this water level difference x is uniquely determined by the plunge depth y below the water surface of the weir. For example, according to Hydrology (Honma et al., Edited by Iwanami Shoten) P199, Given. y = Ho−Q / {μb√ (2gx)} where Ho = water level upstream of the weir, Q = flow rate, μ = outflow coefficient (= 0.6), b = waterway width, and g = gravitational acceleration.

FIG. 8 shows an example of specific behaviors of x and y. That is, the channel width b = 7 m,
Under the condition of flowing water Q = 17.5 m ³ / s (flow velocity = 0.5 m / s), when the water depth of the water channel Ho = 5 m and Ho =
2 shows the relationship between x and y for the two cases of 3 m. As is clear from the figure, the greater the plunge depth y of the weir, the greater the water level difference before and after the weir.

Here, in the dust removing equipment 100 of the present embodiment, it is not preferable that the water level Ho upstream of the movable weirs 103a and 103b rise excessively, so it is preferable that the plunge depth y is not made too large. Specifically, for example, if the water level difference x is kept within 0.1 m, the movable weir 1
03a has a plunge depth y of Ho = 5 m and y = 2.
When 0 m and Ho = 3 m, y = 1.2 m. Therefore, during the drainage operation, normally, the movable weirs 103a, 103a are arranged so that the water level difference x is such that the plunge depth y of this degree can be obtained.
It is preferable to control 103b. At this time, the water pressure corresponding to the water level difference acts on the front surface (upstream side) and the back surface (downstream side) of the movable dams 103a and 103b, so that the movable dams 103a and 103b and the guide roller 114 are provided.
It is necessary that the L, 114R, and the guide rail 115 be designed in advance so as to have a strength that can withstand the water pressure.

When the detection signal from the limit switch 122 is turned on, the control means 105 causes the movable dams 103a and 103b to move up too much, and the screen 101.
a, 101b and the lower end of the movable weir 103a may be vacant, and the limit switch 12
When the detection signal from 3 is turned on, it is determined that the water level becomes low and the movable weirs 103a and 103b collide with the bottom of the water, and the drive motor may be overloaded.
Is supposed to stop.

The water flow generating means 106 is provided for each screen 10
Each of the horizontal screens 101 is provided at two locations 1a and 101b and at four locations (see FIG. 3). Each water flow generation means 106 has a low head (for example, about 1 m) submersible pump 126 mounted on the downstream side of the movable weir 103a (or 103b), and a pipe 128 for guiding the water flow generated from the submersible pump 126, The blower holes 129 located on the upstream side of the movable weirs 103a and 103b (specifically, on the same plane as the flat plate 117) are provided.
A and 101b can be backwashed from the back surface (downstream side) toward the front surface (upstream side). At this time, the water flow generator 106 generates a water flow, and the movable weirs 103a, 10a
Since the entire surface from the upper part to the lower part of the screens 101a and 101b can be automatically backwashed by raising and lowering 3b, the effect can be effectively exhibited even with the submersible pump 126 having relatively low power consumption.

The outflow prevention screen means 108 is shown in FIG.
As shown in, a vertical screen 108a that is provided in a substantially vertical direction and allows a flow to pass in a substantially horizontal direction, and a horizontal screen 108b that is provided in a substantially horizontal direction (= substantially parallel to a water bottom) and allows a flow to pass in a substantially vertical direction are provided. I have it. At this time, as shown in the figure, the water bottom level of the dust storage water channel 102 is configured to gently increase from the front side of the horizontal screen 108 to reach the horizontal screen 108 height, and the installation height of the horizontal screen 108 is a detour. It is higher than the bottom of the waterway 4. The horizontal screen 108
A substantially flat surface having the same height as the horizontal screen 108 may be provided on the upstream side portion of the. In this case, if the heights of the horizontal screen 108 and the substantially flat surface are set to the level that appears on the ground surface at the normal water level, for example, the wheel loader, the shovel, etc. are directly near the horizontal screen 108 when the flood ends and the normal water level is restored. It is also possible to drive up to and collect captured dust. Also, horizontal screen 1
08b is configured to satisfy S ≧ Qg / Hg (Equation 1) where S is the effective capture area, Qg is the estimated maximum dust volume per flood, and Hg is the estimated deposition depth of dust. Has been done. The reason for this will be described later.

Next, the operation and effect of the dust removing equipment 100 of the present embodiment having the above-mentioned structure will be described below.
When a flood such as heavy rain or typhoon occurs,
The main waterway gate 3 on the downstream side of the main waterway 1 is closed, and the bypass waterway gate 6 on the downstream side of the bypass waterway 4 is opened.
The turbid water of the main waterway 1 is discharged by the pump of the drainage pump station 5 through the bypass waterway 4 to prevent flood damage in the basin of the main waterway 1. At this time, the dust and the muddy water flow down in the main water channel, flow from the main water channel 1 into the detour water channel 4, and the horizontal screen 1
Captured by 01. During this time, the movable weirs 103a, 103
3b is held in a state of being driven to the uppermost position as long as there is no gap between the upper ends of the screens 101a and 101b.

Here, the first feature of the present embodiment is the procedure for introducing the dust collected in the horizontal screen 101 into the dust storing water channel 102. FIG. 9 is a flowchart showing the control procedure by the control means 105 at this time.

That is, in FIG. 9, first, the control means 105 controls the driving means 104b to control the horizontal screen 1.
Of the 01, the upstream movable weir 103b corresponding to the upstream screen 101b is lowered so that the bottom surface thereof reaches near the water bottom, and the flow passing through the movable weir 103b is blocked (step S100). As a result, the flow passing through the screen 101b on the upstream side is blocked,
Since the pressing force due to the flowing water pressure acting on the dust trapped on the screen 101b almost disappears, the screen 1
Immediately before 01b, a flow flowing along the screen 101b is induced. Therefore, this screen 1
01b by the fluid force of the flow along 01b
The dust captured by b is stripped from the screen 101b and flows along the screen 101b in a direction away from the shore on one side (the lower side in FIG. 1). In this way
The dust trapped on the screen 101b can be released. At this stage, the screen 10 on the downstream side is
In 1a, since the corresponding movable weir 103a is still held at the uppermost position and the flow is not dammed, the dust scraped off from the screen 101b as described above is captured again by the adjacent screen 101a, From the screen 101a and the dust collected on the screen 101a.

Next, the control means 105 similarly drives the driving means 1
04a is controlled, the movable weir 103b on the upstream side is raised again and held at the uppermost position (step S110), and the original water flow state is restored to secure water flow.

Thereafter, the movable weir 103a on the downstream side is lowered so that the bottom surface thereof reaches near the water bottom (step S120), and the screen 101a is processed in the same manner as described above.
The dust trapped in is removed using fluid force. At this time, since the dust storage water channel 102 and the portion of the bypass water channel 4 on the downstream side of the horizontal screen 101 communicate with each other, a water flow in the downstream direction is created in the dust storage water channel 102 by the operation of the drainage pump of the drainage pump station 5. As a result, the dust that has separated from the screen 101a is introduced into the dust storage water channel 102, so that it flows down the bypass water channel 4 and the horizontal screen 101.
All the dust collected over the entire width of the dust can be guided to the dust storage water channel 102 and accumulated and stored.

After the dust has been introduced into the dust storage water channel 102 as described above, the movable weir 103 on the downstream side is
a is again raised to the uppermost position, and the original water flow state is secured (step S130). Note that the dust removal operation in steps S100 to S130 may be automatically performed at a certain fixed time interval, or when the water level difference obtained from the water level detection means 124, 125 exceeds a predetermined value. You may make it to.

As described above, all the dust trapped on the horizontal screen 101 is introduced into the dust storage water channel 102. The second feature of the present embodiment is that the dust dust introduced into the dust storage water channel 102. It is in the processing method of. That is,
The dust introduced into the dust storage water channel 102 is captured by both the vertical screen 108a and the horizontal screen 108b. Here, it is generally difficult because it is necessary to increase the width of the dust storage water channel 102 in order to increase the effective capture area by the vertical screen 108a, but it is simply difficult to increase the effective capture area by the horizontal screen 108b. Since it suffices to increase the length of the horizontal screen 108b in the flow direction, the effective capture area can be secured relatively easily. In the present embodiment, by utilizing this, S ≧ Qg / Hg (Equation 1) where S is the effective capture area, Qg is the estimated maximum dust volume per flood, and Hg is the estimated deposition depth of dust. Since the horizontal screen 108b is configured in the horizontal screen 108b
Can be captured with. At this time, even if all the dust is captured by the horizontal screen 108b, since the horizontal screen 108b has a large area, there is no clogging due to dust, and water is secured in the dust storage channel 102, so that a flood occurs. It is not necessary to pull up the dust on the horizontal screen 108b to the ground during the pump operation of the drainage pump station 5 until the end. In other words, the dust collected on the horizontal screen 108b can be appropriately pulled up from the horizontal screen 108b after the flood is completed, so that significant labor saving can be achieved as compared with the conventional structure in which the dust needs to be pulled up during the flood.

As described above, according to this embodiment, the control means 105 controls the driving means 104a and 104b to sequentially sink the movable dams 103a and 103b to induce the flow along the horizontal screen 101. Using the fluid force, the dust trapped on the horizontal screen 101 is peeled off and separated. As a result, even if the frictional force of a certain dust becomes extremely large locally, the fluid only passes around the dust and does not significantly affect the stripping action in other portions. That is, even in such a case, although the dust that cannot be removed remains locally, the dust can be almost removed as a whole of the horizontal screen 101. Therefore, it is possible to prevent dust from accumulating on the horizontal screen 101 as in the conventional structure using a mechanical external force, and it is possible to reliably prevent the water permeability of the bypass water passage 4 from decreasing, so that the drainage performance of the drainage system is improved. It can be reliably maintained in good condition.

In the first embodiment, the movable weir 103 is moved to step S100 or step S120.
Although a and 103b are lowered so that the bottom surface thereof reaches near the water bottom, the invention is not limited to this. That is, muddy water, wood, plastic, etc. of dust generally have a smaller specific gravity than water and flow down the surface layer of turbid water due to buoyancy.
It is sufficient to lower 03a and 103b to such an extent that the superficial flow is blocked.

In the first embodiment, before the dust is removed from the horizontal screen 101,
The movable weirs 103a and 103b were held at the uppermost position,
It is not limited to this. That is, as described above, in response to dust flowing down the surface layer, the movable weirs 103a and 103b are lowered slightly to prevent the surface layer flow so that the plunge depth y becomes constant, and always responds to water level fluctuations. You may make it control the surface layer flow direction. In this case, step S
100 and the movable weir 103a, 1 in step S120
Before the descent of 03b, these dusts are collected on the screen 101.
By the flow along a and 101b, the dust will be sent to the dust storage water channel 102, and the dust that has flowed outside the surface layer (that is, in the water or near the water bottom) by the operation in step S100, step S100, or step S120 will flow into the dust storage water channel 102. Will be guided.

Further, in the first embodiment,
Although the horizontal screen 108b is configured so as to satisfy the expression (1), even if it is not satisfied, at least the following is obtained by configuring the outflow prevention screen means 108 by the vertical screen 108a and the horizontal screen 108b. There is an effect. That is, since a wider water passage surface area can be secured as the outflow prevention screen means 108 than in the conventional case where only the vertical screen is used, it is possible to suppress the occurrence of clogging and to secure the same water passage surface area. Since a small space is required as compared with the conventional one, it is possible to achieve space saving of the dust storage water channel 102.

In the first embodiment, the horizontal screen 101 is replaced by the two screens 101a, 101.
2 movable weirs 1 divided into b and correspondingly
03a, 103b and two drive means 104a, 104
Although b is provided, it is not limited to this, and three or more divided structures
It may be arranged. Similar effects are obtained in these cases as well.

Furthermore, in the first embodiment,
Although the submersible pump 126 is used in the water flow generating means 106, the present invention is not limited to this, and another one may be used. This modification will be described with reference to FIGS. 10 (a) and 10 (b).
10A is a diagram showing a structure in the vicinity of the dust removing screen means according to this modification, and FIG. 10B is a diagram showing FIG.
FIG. 4A is a transverse sectional view taken along line EE in FIG. 4A, which corresponds to FIGS. 4A and 4B of the above embodiment, respectively. The same parts as those in FIGS. 4A and 4B are designated by the same reference numerals. 10 (a) and 10 (b),
The main points different from the structures of FIGS. 4A and 4B are:
Vertical propeller type water jet machine 1 instead of submersible pump 126
The movable weir 103 is provided with a blowing hole 151 for discharging the water flow generated from the propeller-type water flow machine 150.
a, 103b are provided on the upstream side (specifically, on substantially the same plane as the flat plate 117), and suction ports 152 for introducing water into the propeller-type water jet machine 150 are provided with the blow-out holes 15
1 is provided above the movable weir 103a,
That is, the structure is made to circulate on the upstream side of 103b.
This makes it possible to make the backwash more powerful by utilizing the characteristics of the propeller-type water jet that consumes less power and produces a large amount of water, so that when the movable weirs 103a and 103b become large, It is also possible to deal with the case where it is necessary to increase the amount of washing water.

In the first embodiment described above, by ensuring that the capture effective area S of the horizontal screen 108b is wide enough to satisfy the equation 1, the dust captured by the horizontal screen 108b is kept on the ground during the pump operation of the drainage pump station 5. I was able to avoid having to pull up to. However, in reality, it may be difficult to secure a sufficient area for installing the horizontal screen 108b because it is difficult to obtain a site or the construction cost is too high. In such a case, it is necessary to appropriately carry out the dust guided to the dust storage water channel 102 to the outside of the water channel during pump operation. An embodiment in the case where such a facility for discharging dust is provided will be described in the following second embodiment.

A second embodiment of the present invention will be described with reference to FIGS.
Will be described. 11 is a plan view showing the overall structure of the dust removing equipment 200 according to the present embodiment, and FIG.
1 FIG. 1 showing a structure near a medium dust bucket 203 (described later)
1 is a cross-sectional view taken along the line F-F in FIG. 1, and FIG. 13 is a view from the direction G in FIG. 11 showing the transfer state of the dust bucket 203. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

11 to 13, the dust removal equipment 200 according to the present embodiment differs from the dust removal equipment 200 according to the first embodiment in that the dust storage water channel 10 is used as an outflow prevention screen means.
2 is provided in the vicinity of the most downstream side portion of the screen 201 in the substantially vertical direction, and is provided in the vicinity of the downstream side of the screen 201 so as to be able to float and sink, and from the dust storage water channel 102 to the bypass water channel 4
A movable weir (gate) 202 as an outflow prevention floating / sink member for stopping the flow toward the drain, and the dust storage water channel 1 by being left stationary on the upstream side of the screen 201 in the dust storage water channel 102.
The dust bucket 203 as a dust collecting means for collecting the dust introduced in 02, and the transfer reversing means 2 for transferring the dust bucket 203 to the outside of the refuse storing water channel 102 and reversing it.
04 and 04.

The screen 201 is the horizontal screen 101.
Has the same structure as the screens 101a and 101b of
It is composed of a large number of parallel plates in a substantially horizontal direction, and has a function of trapping dust flowing in the dust storage water channel 102. The mesh size of the parallel plate is the screen 10
Similar to 1a and 101b, the size is set to be less than or equal to the size of dust, which may be inoperable due to the inhibition of rotation when the pump of the drainage pump station 5 sucks.

The movable weir 202 includes the movable weirs 103a and 103a.
It has a structure similar to that of b and is composed of a rib structure.
In addition, driving means 104a for the movable weirs 103a, 103b,
Similar to 104b, the drive motor 205 and the ball screw shaft 2
A driving unit 208 including a driving unit 06 is provided, and the driving unit 208 is controlled by the control unit 105 to open and close. This movable weir 202
The submergence operation stops the flow by closing the water channel to form a storage site in the dust storage water channel 102 that opens upstream along the bypass water channel 4.

As shown in FIG. 12, the dust bucket 203 is installed on the upstream side of the screen 201 on the bottom surface 102A of the dust storage water channel 102 which is constructed one step higher, with its upper part exposed above the water surface. . At this time, the water bottom surface 102B up to the installation position of the bucket 203 is constructed with a gentle upslope, and the dust that flows down in the water or near the water bottom is swept away by the force of the water flow to climb this upslope and efficiently climb up the bucket 203. It is considered to be collected in. The dust bucket 203 has a substantially box shape, and covers the beam structure 203a and a surface other than an upstream side (right side in FIG. 12) and an upper side of the beam structure 203a, for example, a metal net 203b. It has and. The size in the width direction is set to fit within the width of the refuse storing water channel 102 (see FIG. 13), and the running water in the dust storing water channel 102 is swallowed to accommodate the floating dust. Further, on the downstream side (left side in FIG. 12) of the dust bucket 203, in order to prevent water pressure from being applied to the bucket 203 and pushed away by the water flow, a support stem 209 is provided.
Is provided. In addition, if the level of the water bottom surface 102A on which the bucket 203 is installed is set as high as possible, the lifting height of the crane 210 (described later) becomes small, and the water depth in the dust storage water channel 102 becomes shallow, so that the movable weir 202 is provided. , Screen 202, dust bucket 20
There is an effect that the size in the height direction of 3 can be reduced and the facility cost can be reduced.

The transfer reversing means 204 is the crane 210.
And a bucket reversing device 211. The crane 210 conveys the bucket 203 from the dust storage water channel 102 to the outside of the water channel, and as shown in FIG. 13, the lifting arm 203 provided in the dust bucket 203.
a hook 212 for gripping c, and a traveling rail 213 installed in the width direction of the water channel so as to straddle the dust storage water channel 102,
An electric hoisting machine 214 capable of lifting the bucket 203 and self-propelled on the travel rail 213, and a hook 212.
And a suspension member (for example, a wire) 215 for connecting the electric hoist and traveling machine.

The bucket reversing device 211 is used for the crane 21.
A substantially U-shaped bearing 216, which is disposed below the trailing end of the traveling rail 213 of 0 and serves as a fulcrum for the reversing operation of the bucket 205, and an arm 217 that supports the bearing 216.
It has and. The manner of reversal by the bucket reversing device 211 will be described with reference to FIG. That is, the bucket 203 pulled up from the dust storage water channel 102 by the crane 210 is transported above the bucket reversing device 211. Then, the electric hoisting machine 214 of the crane 210 hangs and lowers the bucket 203,
The inversion shaft 203d provided so as to project to both sides of the bucket 203 in the waterway width direction is provided with a bearing 216 of the bucket inversion device 211
Take it down. At this time, since the reversing shaft 203d is provided in a position eccentric from the center of gravity of the bucket 203 in advance, the bucket 203 automatically reverses as shown in FIG. 14 due to the moment around the bearing 216 due to gravity.
The dust collected in the bucket 203 is discharged to the outside of the bucket 203. At this time, the arm 203c of the bucket 203 is connected to the hook 2 of the crane 210.
In order to always secure the connection with 12 and facilitate re-lifting, it is rotatably connected to the net 205b.
At this time, a sufficient space for accumulating dust is secured below the bucket inverting device 211, and the accumulated dust can be directly transferred to a transportation means such as a truck and carried out.

The other structure is almost the same as that of the first embodiment.

The operation and effects of this embodiment having the above-mentioned configuration will be described below. First, also in this embodiment, the first
The steps S100 to S130 described in the above embodiment are executed, and thereby, all the dust collected on the horizontal screen 101 is introduced into the dust storing water channel 102. At this time, the dust bucket 203 is previously placed in the dust storage water channel 102, and the control means 105 drives the drive means 208.
The movable weir 202 is held in a fully opened state (the lower end is above the water surface, but below the upper end of the screen 201) by being driven. As a result, the dust that has been introduced into the dust storage water channel 102 is
02, flowing down to the bucket 203 immediately.
It is smoothly guided and accumulated inside.

This state is continued for a predetermined period, and the bucket 20
When a certain amount of dust is accumulated in 3, the control means 105
The driving means 208 is controlled by means of to make the movable weir 202 sink and bring it into a fully closed state (a state in which the lower end is almost in contact with the water bottom). As a result, the inside of the dust storage water channel 102 is in a stagnant state in which the flow is almost stopped, and thereafter, the dust does not flow into the bucket 203. In this retention state, the crane 21
By operating 0, the bucket 203 is lifted and transported, and is lowered to the bucket reversing device 211 to be automatically reversed, and the dust inside is discharged to the ground. After that, the crane 210 is operated to lift and transport the bucket 203 again, and the bucket 203 is left at the original installation place in the dust storage water channel 102 again. During this time, the movable weir 202 is fully closed in the dust storage water channel 102, and the flow stays and no flowing water pressure is generated. Therefore, the water pressure is not obstructed when the bucket 203 is pulled up,
Moreover, the bucket 203 can be easily hung at a predetermined position in the dust storage water channel 102 and rearranged. Further, since a small amount of dust that has passed through the bucket 203 is captured by the screen 201 on the downstream side of the bucket 203, it is possible to prevent the dust once introduced into the dust storage water channel 102 from flowing out to the bypass water channel 4 again. It can be prevented. Therefore, a more reliable unloading facility can be obtained.

After that, the movable weir 202 is fully opened again and the above operation is repeated, whereby the dust storage water channel 1
All the dust in 02 can be collected on the ground.

According to the present embodiment described above, the first
Similar to the embodiment described above, it is possible to prevent dust from accumulating on the horizontal screen 101, reliably prevent deterioration of water permeability of the bypass water passage 4, and reliably maintain good drainage performance of the drainage system. To get Further, in addition to this, even when it is necessary to appropriately carry out the dust to the outside of the water channel during the operation of the pump without being able to secure a sufficient area for installing the horizontal screen 108b as in the first embodiment, Appropriately bucket 2 only when a certain amount of dust is accumulated
Since it is sufficient to transfer and reverse 03 to carry out the dust, it is not necessary to repeatedly perform the dust collecting process and the carry-out process in a short tact time, and the treatment can be performed by the batch processing facility. Therefore, since the continuous unloading equipment which is generally used in the past is not required, a operability can be afforded and the reliability of the equipment can be greatly improved. In particular, at the time of flood, usually a large amount of dust flows down at the beginning of operation,
After that, since the amount of dust decreases sharply, the dust removing equipment 200 is suitable for treating dust with a drastic change in the amount of flow.

In the second embodiment, the dust is collected by using the bucket 203 and the transfer reversing means 204. As a means for supplementing the dust, the water bottom surface 102A (see FIG. 12) of the dust storing water channel 102 is normally used. Sometimes, if the water bottom is constructed so that it appears on the surface of the earth, when it returns to normal water level, the wheel loader, excavator, etc. can be directly attached to this water bottom.
It is also possible to board the 02A and collect dust together therewith.

In the second embodiment, the movable weir 202 that functions as a gate is provided only on the downstream side of the bucket 203, but in addition to this, it is also installed on the upstream side.
This upstream movable weir may also be closed when the bucket 203 is lifted. In this case, it is possible to reduce the diffusion of stored dust on the upstream side when the bucket 203 is lifted, so that the dust collection rate can be increased.

Furthermore, in the second embodiment,
The bucket reversing device 211 was used when reversing the dust bucket 203, but the invention is not limited to this. For example, the buckets may be hoisted by two hoists, and the hoisting heights at that time may be changed so as to be reversed. May be. Also in this case, the same effect is obtained.

A third embodiment of the present invention will be described with reference to FIGS.
Will be described. In the present embodiment, the method of introducing dust to the dust storage water channel and the method of carrying out dust to the outside of the water channel are basically the above-described second method.
This embodiment is similar to the embodiment described above, but has a different detailed structure. The same parts as those of the first and second embodiments are designated by the same reference numerals, and the description thereof will be appropriately omitted.

FIG. 15 shows the dust removing equipment 30 according to this embodiment.
16 is a plan view showing the entire structure of No. 0, and FIG. 16 is a cross-sectional view taken along the line HH in FIG. In these FIGS. 15 and 16, the dust removing equipment 300 is, as the main component, the dust removing screen means provided in the bypass water passage 4 and preventing the inflow of dust to the downstream side, as in the dust removing equipment of the second embodiment. Horizontal screen 301, a debris storage channel (bump) 302 for storing dust, which is provided by branching from the vicinity of the installation position of the horizontal screen 301 of the bypass water channel 4, and can be floated and sunk in the vicinity of the downstream side of the horizontal screen 301. Movable weirs 303a, 303b, 303c as dust removal floating / sinking members, which are respectively provided and sink at least the surface layer flow in the flow passing through the horizontal screen 301 in the sinking state, and the movable weirs 303a, 303b, 303c in the floating / sinking direction, respectively. Driving means 304a, 304b, 304c for driving
(However, only 304a is shown in FIG. 16) and control means 305 for controlling the operation of these driving means 304a to 304c.
And a substantially vertical screen 306 provided in the vicinity of the most downstream side of the dust storage water channel 302 as an outflow prevention screen means provided in the dust storage water channel 302 for preventing the outflow of dust to the downstream side, and the dust storage A crane device 308 with a bucket that collects dust introduced into the water channel 302 and carries it out of the water channel is provided.

In the horizontal screen 301, the position in the flow direction is downstream of the portion relatively far from the shore on one side (upper side in FIG. 15) of the bypass water channel 4 in the channel width direction. It is on the side. Particularly in this embodiment, the horizontal screen 301 is divided into three screens 301a, 301b, and 301c that are substantially parallel to the waterway width direction of the bypass waterway 4, and the screen 301c and the screen 301 are also divided.
b and the screen 301a are arranged in a stepwise manner so as to be located on the upstream side in this order. Each screen 301a-30
1c is the screen 101 of the first and second embodiments.
Like a and 101b, it is composed of a large number of parallel plates in a substantially horizontal direction, and the mesh size is set to be equal to or smaller than the size of dust that may be inoperable when the pump of the drainage pump station 5 sucks. In addition, the width of each plate is set to several hundreds mm or more so that string-shaped and thread-shaped dust is unlikely to be entangled. It should be noted that this parallel plate is not limited to a substantially horizontal direction, and a vertical parallel plate or a diagonal parallel plate may be appropriately used.

The dust storage water channel 302 has a screen 306.
Is connected to the downstream side of the horizontal screen 301 in the bypass water channel 4, whereby the flow out of the refuse storage water channel 302 joins the bypass water channel 4 again.

The movable weirs 303a to 303c are the movable weir 10
Similar to 3a and 103b, it is a rib structure, and guide rollers (not shown) provided at both ends thereof have a wall surface 4B on one side of the bypass water channel 4 and two center piers 4A and 4A.
It is possible to smoothly move up and down by traveling while being guided by the guide rails (same) that are fixed to each of the A and dust storage waterway side piers 4C.

The drive means 304a to 304c, like the drive means 104a and 104b, drive a drive motor (not shown) that generates a rotational force, and the rotational force from the drive motor into vertical movements of the movable dams 303a to 303c. It has a ball screw shaft (same) to convert. Then, the displacements of the movable weirs 303a to 303c at this time are detected by the displacement detection means (the same) and transmitted to the control means 305.

Similar to the control means 105, the control means 305 receives the detection signals from the well-known water level detection means 124 and 125 for detecting the water levels on the upstream side and the downstream side, respectively, and the detection signals from the displacement detection means. Based on these, the movable weirs 303a to 30a follow the water level change on the upstream side.
The vertical drive of the movable dams 303a to 303c by the drive motor is controlled so that the plunge depth of 3c is substantially constant.

The screen 306 is a horizontal screen 303.
It is composed of a relatively coarse plate screen and has a function of trapping dust that flows through the dust storage water channel 302. Instead of the plate screen, a bar screen or a net screen may be used as appropriate. At this time, in the dust storage water channel 302, the installation height of the screen 306 is higher than the water bottom of the bypass water channel 4 (see FIG. 16). Crane device with bucket 30
Reference numeral 8 indicates running rails 309 and 309 for moving the waterway direction provided on both sides in the width direction of the dust storing water passage 302, and running rails 309, 309 for moving the waterway direction provided so as to straddle the dust storing water passage 302 in the width direction. Runnable body 31
0, a crane 311 provided so as to be able to travel on a traveling rail (not shown) for moving in the width direction provided on the traveling body 310, and a bucket 312 suspended from the crane 311 so as to be lifted and lowered freely. It has and. As a result, the bucket 312 can access most of the area in the dust storage water channel 302 from above. At this time, the traveling rails 309, 309 for moving the waterways are provided.
A truck carry-in port 313 through which a truck can directly enter is provided below the most downstream side portion of the truck, so that the dust collected by the crane device 308 can be directly transferred to the truck and carried out.

The operation of this embodiment having the above configuration will be described below. First, also in the present embodiment, the control means 305 controls the steps S100 to S100 described in the first embodiment.
The procedure similar to S130 is performed, and thereby all the dust 314 captured by the horizontal screen 301 is introduced into the dust storage water channel 302. Then, the dust 314 introduced into the dust storage water channel 302 is captured in the screen 306 while flowing down in the dust storage water channel 302 toward the downstream, and is gradually stored on the upstream side of the screen 306. In such a state, the crane device 308 is operated at any time to hang the bucket 312 to remove the dust 3
14 is collected, lifted again, and transported to the truck carry-in port 313, and the dust 314 in the bucket 312 is discharged to the bed of the truck waiting at the truck carry-in port 313.
As a result, all the dust 314 captured on the horizontal screen 301 can be carried out of the facility.

According to the present embodiment, as in the first embodiment, it is possible to prevent dust from accumulating on the horizontal screen 301 and to reliably prevent the water flow in the bypass water passage 4 from being deteriorated. The effect is that the drainage performance can be reliably maintained in good condition.

The third embodiment can be modified in various ways without departing from the spirit of the present invention. These modifications will be sequentially described below. (1) When a plate-like member and a rotary weir are provided on the upstream side of the movable weir FIG. 17 is a plan view showing the overall structure of the dust removing equipment according to this modification. This dust removing facility is provided with movable weirs 303a, 30
3b, 303c, plate-shaped members 315a, 315b, 315c that are fixed via an arm and move up and down together with movable weirs 303a, 303b, 303c, and provided on the upstream side of these plate-shaped members 315a, 315b, 315c. And a large number of rotary weirs 316.

The plate-like members 315a to 315c are arranged substantially in the vertical direction, and the dimension in the height direction is the movable weir 303.
It is almost the same as a-303c. The movable weir 30 is placed in the space formed between the movable weirs 303a to 303c.
A water channel along 3a to 303c is formed. At this time, since a water pressure according to the water level and the flow velocity is applied to these plate-shaped bodies 315a to 315c, the plate-shaped bodies 315a to 315c are strongly preliminarily structurally designed to withstand this water pressure. The plate-shaped members 315a to 315c may be configured to move up and down together with the movable dams 303a to 303c by a separate and independent drive mechanism. In this case, the movable weirs 303a to 303c may be settled first, and a certain amount of dust 314 may flow before the plate-shaped bodies 315a to 315c are settled. In addition, the plate-shaped members 315a to 315c are arranged in the water channel direction (see FIG.
7 left / right direction), and in this case, the plate-shaped bodies 315a to 315c and the movable weirs 303a to 303a.
You may change the distance to 03c according to the state of dust 314.

The rotary weir 316 is rotated by a rotation mechanism (not shown) to the position shown by the alternate long and short dash line in the figure, thereby controlling the water flow direction.

According to this modification, the plate-shaped members 315a to 315a-31 are provided.
5c and the movable weirs 303a to 303c by the action of the narrow water channel, the dust 314 is moved to the dust storage water channel 302.
The flow to be introduced into can be promoted. Further, by rotating the rotary weir 316, the flow of introducing the dust 314 into the dust storage water channel 302 can be further promoted, and the dust 314 can flow faster.

(2) When the horizontal screens are arranged obliquely and a terrace is provided at the entrance of the detour waterway FIG. 18 is a plan view showing the entire structure of the dust removing equipment according to this modification. In this dust removing facility, the screens 301a, 30a
1b and 301c are provided in a substantially straight line so as to be oblique to the width direction of the bypass waterway 4 (vertical direction in FIG. 18), and the screens 301a to 301c are provided so as to correspond to this arrangement.
A rectifying terrace 318 is provided on the upstream side of 301c. In this terrace 318, the portion 318a on the dust storage water channel 302 side is one step higher than the portion 318b on the anti-dust storage water channel side.

According to this modification, the dust 314 can be introduced into the dust storage water channel 302 more smoothly.

(3) When only the uppermost stream side of the obliquely arranged horizontal screen is arranged in the waterway width direction FIG. 19 is a plan view showing the entire structure of the dust removing equipment according to this modification. In this dust removing equipment, when the horizontal screen 301 is provided obliquely to the width direction of the bypass water channel 4 as in the modification example (2), only the screen 301c on the most upstream side is provided with the width of the bypass water channel 4. It is provided almost parallel to the direction. Further, the installation position of the screen 301c is a branch position between the main water channel 1 and the bypass water channel 4, and accordingly, the water level detection means 124 on the upstream side of the horizontal screen 301 is relocated to the main water channel 1 on the upstream side. .

When the horizontal screen 301 is provided so as to be obliquely crossed as in the modification (2), the horizontal screen 301 shown in FIG.
As compared with the case where each screen 301a, 301b, 301c is provided in the waterway width direction, the required length of the entire equipment in the waterway direction (horizontal direction in each figure) becomes larger, making it difficult to acquire a site or Construction costs may be too high. Therefore, as described above, the screen 30
By providing only 1c in parallel with the width direction of the bypass water channel 4, the length in the water channel direction required for the entire equipment can be suppressed. At this time, by installing the screen 301c at the branch position between the main water channel 1 and the bypass water channel 4, the screen 301c faces the flow of the main water channel 1, and the flow along the screen 301c is naturally induced. . Therefore, it is possible to save space without deteriorating the dust removal performance.

[0085]

According to the present invention, the dust trapped on the dust removing screen means is peeled off and separated by the fluid force of the flow induced along the dust removing screen means.
As a result, even if the frictional force of a certain dust becomes extremely large locally, the fluid only passes around the dust and does not significantly affect the stripping action in other portions. That is, even in such a case, although the dust that cannot be removed remains locally, the dust can be almost removed from the entire screen. Therefore, it is possible to prevent dust from accumulating on the screen as in the conventional structure using a mechanical external force, and it is possible to surely prevent the water permeability of the bypass water channel from decreasing, so that the drainage performance of the drainage system is surely improved. Can be maintained at.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire structure of a dust removing equipment according to a first embodiment of the present invention.

FIG. 2 is a layout plan view of a general drainage system of this type to which the dust removal equipment shown in FIG. 1 is applied.

FIG. 3 is an enlarged plan view showing the structure in the vicinity of the dust removing screen means in FIG.

FIG. 4 is a cross-sectional view taken along line BB and a view from the direction A in FIG.

5 is a view of the movable weir in FIG. 1 as viewed from the back side and a cross-sectional view taken along the line C-C.

FIG. 6 is a diagram showing an example of a detailed configuration of displacement detecting means.

FIG. 7 is a diagram for explaining control of constant plunge depth by control means.

FIG. 8 is a diagram showing an example of specific behaviors of a water level difference x and a plunge depth y.

FIG. 9 is a flowchart showing a control procedure by a control means.

FIG. 10 is a diagram showing a structure in the vicinity of a dust removing screen means according to a modification and a lateral cross-sectional view taken along the line EE.

FIG. 11 is a plan view showing the overall structure of the dust removing equipment according to the second embodiment of the present invention.

12 is a cross-sectional view taken along the line FF in FIG.

FIG. 13 is a view from the direction G in FIG. 11 showing the transfer state of the dust bucket.

FIG. 14 is a diagram showing a state of reversal by a bucket reversing device.

FIG. 15 is a plan view showing the overall structure of a dust removing equipment according to a third embodiment of the present invention.

16 is a cross-sectional view taken along the line HH in FIG.

FIG. 17 is a plan view showing the overall structure of a dust removing equipment according to a modification in which a plate-like body and a rotary weir are provided on the upstream side of a movable weir.

FIG. 18 is a plan view showing an overall structure of a dust removing equipment according to a modified example in which horizontal screens are arranged obliquely and terraces are provided at the entrance of the bypass water channel.

FIG. 19 is a plan view showing the entire structure of the dust removing equipment according to a modification in which only the uppermost stream side of the obliquely arranged horizontal screen is arranged in the waterway width direction.

[Explanation of symbols]

1 River (main waterway) 3 Main waterway gate 4 Detour waterway 5 Drainage station 6 Detour waterway gate 100 Dust removal equipment 101 Horizontal screen (dust removal screen means) 102 Dust storage waterway 103a, b Movable weir (dust removal floating / sink members) 104a, b Drive means 105 Control means 106 Water flow generation means 108 Outflow prevention screen means 108a Vertical screen 108b Horizontal screen 109 Parallel plate 111 Winches (lifting means) 200 Dust removal equipment 201 Screen (outflow prevention screen means) 202 Movable weir (outflow prevention floatation Member) 203 dust bucket (dust collecting means) 204 transfer reversing means 300 dust removing equipment 301 horizontal screen (dust removing screen means) 302 dust storing water channels 303a-c movable weir (dust removing floating member) 304a-c driving means 305 control means 30 6 Outflow prevention screen means

─────────────────────────────────────────────────── ─── Continuation of the front page (31) Priority claim number Japanese Patent Application No. 9-91850 (32) Priority date April 10, 1997 (April 10, 1997) (33) Priority claim country Japan (JP) (31) Priority claim number Japanese Patent Application No. 9-251638 (32) Priority date September 17, 1997 (September 17, 1997) (33) Country of priority claim Japan (JP) (72) Inventor Yoshihiko Yoshikawa 4-6, Surugadai, Kanda, Chiyoda-ku, Tokyo, Hitachi, Ltd., Electric Machinery Department (72) Inventor, Akira Manabe 603, Kamimachi, Tsuchiura-shi, Ibaraki Hitachi, Ltd., Tsuchiura Plant, Hitachi, Ltd. (72) Shiro Matsui, Tsuchiura, Ibaraki Katemachi 603, Hitachi Ltd. Tsuchiura factory (72) Inventor Katsuaki Kikuchi 603 Kintachicho, Tsuchiura, Ibaraki Prefecture Hitachi Co., Ltd. Tsuchiura plant (72) Inventor Takao Matsunaga 603, Kachimachi, Tsuchiura, Ibaraki Stock Company Hitachi, Ltd. Tsuchiura factory (56) Reference JP-A-7-71019 (JP, A) JP-A-8-158345 (JP, A) Actual opening 4-84429 (JP, U) Actual opening 4-108613 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02B 5/08 101 E02B 5/00 E03F 1/00

Claims (12)

(57) [Claims] 1. A main waterway gate provided at a downstream portion of the main waterway, a bypass waterway branching from the main waterway and provided with a drainage pump, and a bypass waterway gate provided at a downstream portion of the bypass waterway. It is installed in a drainage system provided with, and is provided in the bypass water channel by branching from the vicinity of the installation position of the dust removal screen means for preventing dust from flowing into the downstream side and the bypass water channel. In a dust removal facility of a drainage system including a dust storage water channel for storing dust, each of which is provided to be floatable and sinkable near the downstream side of the dust removing screen means, and in a sinking state, of the flow passing through the dust removing screen means. At least a plurality of dust removing floating / sinking members for stopping the surface flow, and a plurality of driving means for driving the plurality of dust removing floating / sinking members in the floating / sinking direction, respectively. And a control means for controlling the operation of the driving means, and the first part of the dust removing screen means that is relatively far from the bank on one side of the bypass waterway in the waterway width direction, A dust removing facility for a drainage system, characterized in that the position in the flow direction is on the downstream side of a second portion relatively close to the shore on the one side in the waterway width direction. 2. The dust removing equipment for a drainage system according to claim 1, wherein the control means is arranged to sequentially sink the plurality of dust removing floating / sinking members from one at one end of the bypass water channel. Dust removal equipment for drainage system, characterized by controlling driving means. 3. The dust removing equipment for a drainage system according to claim 1, wherein the dust removing screen means is provided in a substantially straight line so as to be oblique to the width direction of the bypass water channel. Dust removal equipment for drainage system. 4. The dust removing equipment for a drainage system according to claim 3, wherein the dust removing screen means is provided in a substantially straight line at an angle of 30 ° or more and 60 ° or less with respect to a width direction of the bypass water channel. Dust removal equipment for drainage systems. 5. The dust removing equipment for a drainage system according to claim 1, wherein the dust removing screen means is a structure divided into a plurality of screens arranged at a plurality of positions in the width direction of the bypass water channel, and the screens are divided. At least one of them is arranged substantially parallel to the width direction of the bypass water passage, and the dust removing equipment of the drainage system is characterized. 6. The dust removing equipment for a drainage system according to claim 1, further comprising water flow generating means for generating a water flow in a water area near an upstream side of the dust removing screen means. 7. The dust removing equipment for a drainage system according to claim 1, wherein the dust removing screen means has a structure divided into a plurality of screens arranged at a plurality of positions in the width direction of the bypass water channel, and Dust removal equipment for drainage system, which is equipped with a lifting means for lifting the screen above the water surface. 8. The dust removing facility for a drainage system according to claim 1, further comprising outflow prevention screen means provided in the dust storage water channel to prevent outflow of dust to the downstream side, and the dust storage water channel. The drainage system dust removal equipment, wherein the downstream side of the outflow prevention screen means is connected to a part of the bypass waterway downstream of the dust removal screen means. 9. The dust removing equipment for a drainage system according to claim 8, wherein the outflow prevention screen means is provided in a substantially vertical direction and a vertical screen that allows the flow to pass in a substantially horizontal direction, and a flow provided in a substantially horizontal direction. And a horizontal screen which allows the water to pass through in a substantially vertical direction. 10. The dust removing equipment of the drainage system according to claim 9, wherein S is the effective capture area of the horizontal screen, Qg is the estimated maximum dust volume per flood, and Hg is the estimated deposition depth of dust. , S ≧ Qg / Hg, wherein the horizontal screen is configured so that the dust removal equipment of the drainage system. 11. Dust removal equipment for a drainage system according to claim 8, wherein the outflow prevention screen means is provided so as to be able to float and sink in the vicinity of the downstream side, and prevents outflow from the dust storage water channel to the bypass water channel. A floating member,
A dust collecting means for accumulating the dust introduced into the dust storing water channel, which is left on the upstream side of the outflow prevention screen means in the dust storing water channel, and transfers this dust collecting means to the outside of the dust storing water channel. Dust removal equipment for a drainage system, comprising: 12. The dust removing equipment for a drainage system according to claim 1, wherein the dust removing screen means is composed of a plurality of parallel plates in a substantially horizontal direction.