JP2000073345A - Forcible drainage facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a site for forcible drainage, and reduce a cost of equipment by forcibly draining water of an upstream side channel of a gate to a downstream side channel by using a forcible drainage pipe arranged along a natural drainage channel. SOLUTION: A dust collector 3 is arranged freely to lift on an upstream side of a gate 1 arranged on a natural drainage channel. A downstream side channel 2b of the gate communicated with a main cannel 2c of a downstream side of a natural drainage channel 2 is constituted by a sluiceway 7. A forcible drainage pipe 6 for communicating an upstream side channel 2a formed between the dust collector 3 and the gate 1 and a sluiceway 7 is arranged along a natural drainage channel 2. A check valve 6a is provided in the forcible drainage pipe 6, and a pump 5 is provided to forcibly drain water of the upstream side channel 2a to the sluiceway 7 through the forcible drainage pipe 6. Moreover, a gate 8 for a back flow check is provided on a downstream end side of the sluiceway 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced drainage system for forcibly draining water from an upstream channel of a gate to a downstream channel with a gate installed in a natural drainage channel closed. Forced drainage equipment that eliminates the need for forced drainage premises and reduces equipment costs by installing forced drainage pipes that connect the upstream and downstream waterways of the gate along the natural drainage channels It is about.

[0002]

2. Description of the Related Art Conventional drainage facilities for gates include a natural drainage channel and a forced drainage channel. The natural drainage channel is a route that opens a gate installed in the waterway and naturally drains water on the upstream side to the downstream side. In the forced drainage channel, a pump station that forcibly drains water is installed between the upstream channel and the downstream channel, forcibly draining water from the upstream channel to the downstream using a pump. . As shown in FIG. 7, in the forced drainage channel, a route is formed so as to branch off from the natural drainage channel and merge again on the downstream side, and a site for forced drainage is required. In the forced drainage, it is necessary to provide a facility for forcibly draining water from the upstream canal to the downstream canal. , Gutter pipes, gate equipment for backflow prevention, etc. are provided.

[0003]

However, the provision of a forced drainage channel in addition to a natural drainage channel requires additional sites and facilities for forced drainage, which leads to extra costs and higher costs. There is a problem of becoming.

[0004] In view of the above problems, the present invention has been made to solve the problems, and an object of the present invention is to use a forced drainage pipe arranged along a natural drainage channel. To drain the water from the upstream canal to the downstream canal, eliminating the need for a site for forced drainage,
An object of the present invention is to provide a forced drainage facility capable of reducing the facility cost.

[0005]

In order to achieve the above object, a first aspect of the present invention is to dispose a dust remover in a water passage upstream of a gate installed in a natural drainage channel so as to be able to move up and down. The downstream channel of the gate communicating with the main channel on the downstream side of the gate is composed of gutter pipes, and the forced drain pipe that connects the upstream channel between the dust remover and the gate with the gutter tube of the downstream channel of the gate is naturally formed. A pump is installed along the drainage channel, a check valve is installed in the forced drainage pipe, and a pump is installed to forcibly drain the water in the upstream waterway of the gate to the gutter pipe in the downstream waterway of the gate through the forced drainage pipe. It comprises means for providing a backflow prevention gate on the end side. Here, the backflow prevention gate comprises a lifting gate or a flap gate.

According to a second aspect of the present invention, a dust remover is installed so as to be able to move up and down in an upstream waterway of a gate installed in a natural drainage channel, and a downstream side of the gate communicating with a main waterway downstream of the natural drainage channel. The water channel is composed of gutter pipes, a discharge water tank is provided between the gate and the gutter pipe, and the forced drain pipe that connects the upstream water path between the dust remover and the gate with the discharge water tank downstream of the gate is naturally drained. A check valve is provided on the forced drainage pipe, a check valve is provided along the channel, and a pump is provided for forcibly draining water from the upstream waterway of the gate to the discharge water tank downstream of the gate through the forced drainage pipe. And means provided with a backflow prevention gate.
Here, the backflow prevention gate comprises a lifting gate or a flap gate.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments of the invention shown in the drawings.

[Embodiment 1] FIG. 1 is a sectional side view of a forced drainage facility, FIG. 2 is a plan view of the forced drainage facility, and FIG.
FIG. 3 is a side sectional view of a forced drainage facility.

In the figure, a gate 1 is installed in a natural drainage channel 2 so as to block the natural drainage channel 2 in a transverse direction thereof. The gate 1 is moved up and down by the door 1a.
It has a structure that opens and closes the natural drainage channel 2. Gate 1
During natural drainage, the door 1a is raised to drain water, and during forced drainage, with the door 1a closed, the pump 5 provided in the water absorption tank 4 is operated to force the drain 1 through the drain pipe 6.
The structure is such that water in the upstream water passage 2a of the door 1a is forcibly drained to the gutter 7 of the downstream water passage 2b.

A dust remover 3 for removing dust floating in the upstream waterway 2a is installed in the upstream waterway 2a of the natural drainage channel 2 in which the gate 1 is installed so as to be able to move up and down. The dust remover 3 is rotated upward with the upper side as a pivot, and is rotated upward.
Is moved upward above the upstream water passage 2a, turned downward, and the lower side of the dust remover 3 descends and sinks to the bottom side of the upstream water passage 2a.

The rear side of the upper part of the dust remover 3, that is,
Near the gate 1 side, an upstream waterway 2a is provided by a dust remover 3.
Dust Conveyor 3 that discharges dust that has been scraped up
is disposed so as to cross over the upstream waterway 2a, and the dust scraped up by the dust remover 3 is discharged to the side above the upstream waterway 2a.

Upstream waterway 2 between dust remover 3 and gate 1
The water absorption tanks 4 are provided on both side surfaces of “a” at positions retracted from the side surfaces. The water absorption tank 4 is in communication with the upstream water passage 2a, and a part of the water in the upstream water passage 2a always flows into both water absorption tanks 4, and the water surface of the upstream water passage 2a and the water surface of both water absorption tanks 4 are the same. It is in a state.

Each of the water absorption tanks 4 is provided with a pump 5 facing downward. Each pump 5 is provided such that its suction port 5 a is located near the bottom of the water absorption tank 4. The pump 5 is connected to the water in the water absorption tank 4, that is, the water channel 2 on the upstream side of the gate 1.
a through the forced drainage pipe 6 to the downstream waterway 2 of the gate 1
The function of forcibly draining water into the gutter pipe 7 of FIG. A machine frame 4a is mounted between upper portions of the left and right water absorption tanks 4 where the pumps 5 are provided.

The forced drainage pipe 6 is provided along both sides of the natural drainage channel 2b between the upstream water channel 2a between the dust remover 3 and the gate 1 and the gutter pipe 7 of the downstream water channel 2b of the gate 1. The water in the water absorption tank 4 sucked by the pump 5, that is, the water in the upstream water passage 2 a of the gate 1 is discharged to the downstream water passage 2 b of the gate 1.
This is a passage in the case of forcibly draining water to the gutter pipe 7.

The upstream end of the forced drain pipe 6 is connected to the water absorption tank 4, ie, the pump 5 provided in the upstream water passage 2a of the gate 1, and the downstream side of the forced drain pipe 6 is connected to the natural drain passage 2 and the gate 1.
And the downstream end thereof is connected to the side surface of the gutter pipe 7 of the downstream water passage 2 b of the gate 1.

A check valve 6a is provided at the downstream end of the forced drainage pipe 6 connected to the side of the gutter pipe 7. The check valve 6a is mounted so as to prevent water from flowing from the downstream end of the forced drain pipe 6 to the gutter pipe 7 side, but to prevent water from flowing from the gutter pipe 7 to the forced drain pipe 6 side. ing. By the function of the check valve 6 a, the backflow from the gutter pipe 7 of the downstream channel 2 b of the gate 1 to the upstream channel 2 a of the gate 1 is prevented.

A gutter 7 forming a downstream channel 2b of the gate 1 is formed in the ground of a riverbed, and its upstream end is directly connected to the gate 1, and its downstream end is connected to, for example, the main river 2c as a main channel 2c. Communicating. A backflow prevention gate 8 is provided at the downstream end side of the gutter pipe 7 communicating with the main river in the main waterway 2c. The backflow prevention gate 8 extends from the main river of the main waterway 2c to the gutter 7
This is a gate that prevents water from flowing back into the interior. Backflow occurs when the water level of the main river in the main channel 2c becomes higher than the water level inside the gutter 7.

As the backflow prevention gate 8, a lift gate 8a as shown in FIG. 1 or a flap gate 8b as shown in FIG. 3 is used. The lift gate 8a is vertically moved up and down along a guide groove of a gate pillar formed vertically on both the left and right sides, and is opened and closed, and is operated by a backflow prevention gate operation panel (not shown).

The lower end of the flap gate 8b is connected by a hinge structure, and is pivotally opened toward the main river side of the main waterway 2c with the hinge structure as a fulcrum. The flap gate 8b opens and closes automatically according to the water level difference between the gutter pipe 7 and the main waterway 2c, thereby draining water from the gutter pipe 7 to the main waterway 2c, and flowing backward from the main waterway 2c to the inside of the gutter pipe 7. Can be prevented.

That is, when the water level of the gutter pipe 7 becomes higher than the water level of the main waterway 2c on the main river side, the water pressure due to the water level difference increases from the inside of the gutter pipe 7 toward the main waterway 2c. 8b, the flap gate 8b is opened, and drainage is performed from inside the gutter pipe 7 toward the main waterway 2c.

Conversely, the water level on the main river side of the main waterway 2c is
Above the water level, the water pressure due to the water level difference increases the main waterway 2c
Acts on the flap gate 8b from the side toward the gutter pipe 7 side,
For this reason, the flap gate 8b is pressed toward the gutter pipe 7 so that the downstream end of the gutter pipe 7 is closed, and the water in the main waterway 2c flows into the gutter pipe 7 and flows backward to the upstream waterway 2a. To prevent

The gate 1 installed in the natural drain 2
There is a gate post 1b vertically on the left and right of the
Guide grooves (not shown) are formed on the left and right inner side surfaces of the door 1 of the gate 1 to vertically guide the sliding movement of the door a, and the door 1a of the gate 1 is structured to move up and down along the guide grooves. ing. Rollers (not shown) are provided at the left and right ends of the door body 1a to reduce sliding resistance with the guide groove, so that when the door body 1a moves up and down, it can be smoothly moved up and down along the guide groove. .

An operation room 1c is provided above the gate post 1b vertically installed on the left and right sides of the natural drainage channel 2 where the gate 1 is installed. A winding drum (not shown) for raising and lowering the door 1a is installed in the operation room 1c. Further, a drive motor (not shown) for driving the hoist drum is installed in the operation room 1c.

The lower ends of wire ropes (not shown) for raising and lowering the door 1a are connected to the left and right upper ends of the door 1a, respectively. The upper end side of the wire rope is wound on a winding drum (not shown) provided in an operation room 1c provided above the wire rope, and the winding drum is rotated by a drive motor to wind up or rewind the wire rope. Then, the door 1a to which the lower end of the wire rope is connected is vertically moved up and down.

Next, the operation based on the configuration of the above embodiment of the present invention will be described below. When the water in the upstream waterway 2a of the door 1a is forcibly drained to the gutter 7 of the downstream waterway 2b in a state where the natural drainage channel 2 is closed by lowering the door 1a of the gate 1, the upstream waterway 2a Pumps 5 respectively provided in water absorption tanks 4 formed at the retracted positions on both side surfaces of the
Activate The operation of the pump 5 is performed by operating a pump control panel.

When the pump 5 is operated, the water in the water absorption tank 4, that is, the water in the upstream water passage 2 a of the door 1 a is provided downward in the water absorption tank 4 formed at the recessed position on both sides of the natural drainage passage 2. The water is sucked from the suction port 5a of the operating pump 5, and is forced through the forced drainage pipe 6 disposed along both sides of the natural drainage channel 2. It is forcibly discharged into the gutter tube 7 of 2b.

The water that has been forcibly discharged into the gutter pipe 7 of the downstream water passage 2b of the gate 1 is continuously pumped out from the forced drain pipe 6 by the operation of the pump 5 and is discharged downstream of the gutter pipe 7. It is pressed toward the end and flows down the inside thereof, and is discharged from the downstream end of the gutter pipe 7 to, for example, the main river of the main waterway 2c.

At this time, the water level inside the gutter pipe 7 is
When the water level is higher than the water level of c and the backflow prevention gate 8 provided at the downstream end of the gutter pipe 7 comprises the elevating gate 8a, the door body is raised to open the backflow prevention gate 8.
When the backflow prevention gate 8 is composed of the flap gate 8b, the water pressure due to the water level difference acts from the inside of the gutter pipe 7 to the outer main waterway 2c, so that the flap gate 8b opens toward the main waterway 2c.

In this way, the water channel 2 on the upstream side of the door 1a
By the operation of the pump 5, the water of a passes through the water suction tank 4, the pump 5, and the forced drainage pipe 6 formed at positions retracted from both side surfaces of the upstream waterway 2 a, and flows into the gutter pipe 7 of the downstream waterway 2 b of the gate 1. It is forcibly discharged and discharged from the gutter pipe 7 to the main waterway 2c.

By the way, in the case where forced drainage is not performed with the gate 1 closed, the downstream waterway 2
When the water level of the main waterway 2c becomes higher than the water level of the gutter pipe 7b, and the backflow prevention gate 8 provided at the lower end side of the gutter pipe 7 comprises the elevating gate 8a, the door is lowered and closed. , The backflow can be reliably prevented.

In the case where forced drainage is not performed with the gate 1 closed, when the water level of the main channel 2c becomes higher than the water level of the channel 7 of the downstream channel 2b of the gate 1, the gutter 7 When the backflow prevention gate 8 provided at the lower end of the flap comprises a flap gate 8b, the gutter pipe 7 and the main waterway 2c
Flap gate 8 by the water pressure generated by the water level difference
Since b is pressed toward the gutter pipe 7 side, the downstream end of the gutter pipe 7 is closed by the pressed flap gate 8d, and backflow is prevented.

[Embodiment 2] FIG. 4 is a sectional side view of a forced drainage facility, FIG. 5 is a plan view of the forced drainage facility, and FIG.
FIG. 3 is a side sectional view of a forced drainage facility.

The second embodiment is different from the first embodiment in that a discharge water tank 9 is provided between the gate 1 and the gutter 7 and the downstream end of the forced drain 6 is discharged. It is connected to the lower part of the water tank 9 and is otherwise the same, and the backflow prevention gate 8 may also be a lifting gate 8a and a flap gate 8b.

The discharge water tank 9 is provided in the downstream water passage 2 b of the gate 1, and the side of the gate 1 facing the downstream water passage 2 b faces the discharge water tank 9. The upstream end of the gutter 7 is connected to the downstream side of the discharge water tank 9 opposite to the side facing the gate 1. The upper surface of the discharge water tank 9 is opened, and the height of the discharge water tank 9 is higher than the high water level of the main channel 2c.

Then, the pump 5 is operated to operate the forced drain pipe 6.
From the upstream water channel 2a into the discharge water tank 9,
By setting the water level of the discharge water tank 9 higher than the water level of the main waterway 2c, the internal water can be removed from the gutter pipe 7 toward the main waterway 2c even when the main waterway 2c is at a high water level.

It should be noted that the present invention is not limited to the above embodiment of the present invention, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0037]

As is apparent from the above description, according to the forced drainage system according to the first aspect of the present invention, a dust remover is set up and down in a water channel upstream of a gate installed in a natural drainage channel, A gutter pipe forms the downstream waterway of the gate communicating with the main waterway downstream of the natural drainage channel, and forced drainage connects the upstream waterway between the dust remover and the gate and the gutter pipe of the downstream waterway of the gate. A pipe is arranged along the natural drainage channel, a check valve is provided in the forced drainage pipe, and a pump is provided for forcibly draining the water in the upstream channel of the gate to the gutter pipe in the downstream channel of the gate through the forced drainage pipe, By providing a backflow prevention gate at the downstream end of the gutter pipe, the water in the upstream canal can be forcibly drained to the downstream canal using the forced drainage pipe arranged along the natural drainage channel. This eliminates the need for a site for forced drainage and reduces equipment costs. It can be reduced.

According to the forced drainage system according to the second aspect of the present invention, the dust remover is set up and down freely in the upstream channel of the gate installed in the natural drainage channel, and communicates with the main channel downstream of the natural drainage channel. The downstream channel of the gate to be formed is a gutter pipe, a discharge water tank is provided between the gate and the gutter tube, and the forced water communication between the upstream water channel between the dust remover and the gate and the discharge water tank on the downstream side of the gate is performed. A drainpipe is provided along the natural drainage channel, a check valve is provided in the forced drainage pipe, and a pump is provided for forcibly draining the water in the upstream waterway of the gate to the discharge water tank downstream of the gate through the forced drainage pipe, By providing a backflow prevention gate at the downstream end of the gutter pipe, the water in the upstream canal can be forcibly drained to the downstream canal using the forced drainage pipe arranged along the natural drainage channel. This eliminates the need for a site for forced drainage, The water level of the discharge water tank is always higher than the water level of the main waterway, so that even when the water level of the main waterway is high, the water is drained from the gutter pipe side to the main waterway side. And can eliminate inland water.

Further, when the backflow prevention gate comprises a lift gate, when the water level of the gutter pipe becomes higher than the water level of the main channel, the lift gate is raised and opened. The drainage can be drained from the gutter pipe side to the main waterway side, and inland water can be removed. Conversely, when the water level of the main waterway becomes higher than the water level of the gutter pipe, the lifting gate is lowered and closed. Thereby, it is possible to reliably prevent the external water in the main water channel from flowing backward from the downstream end of the gutter pipe.

In the case where the backflow prevention gate is a flap gate, when the water level of the gutter pipe is higher than the water level of the main channel, the water pressure generated by the difference in water level causes the gutter pipe to have a lower pressure. Acting on the flap gate to open the downstream end, drainage can be performed from the gutter pipe side to the main waterway side, and internal water can be removed. Conversely, the water level of the main waterway is the water level of the gutter pipe. When it becomes higher, the water pressure generated by the water level difference acts on the flap gate so as to close the downstream end of the gutter pipe, so that the flap gate prevents the external water of the main channel from flowing backward from the downstream end of the gutter pipe. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a forced drainage facility showing Embodiment 1 of the present invention.

FIG. 2 is a plan view of a forced drainage facility showing Embodiment 1 of the present invention.

FIG. 3 is a side sectional view of a forced drainage facility showing Embodiment 1 of the present invention.

FIG. 4 is a side sectional view of a forced drainage facility showing Embodiment 2 of the present invention.

FIG. 5 is a plan view of a forced drainage facility showing Embodiment 2 of the present invention.

FIG. 6 is a side sectional view of a forced drainage facility showing Embodiment 2 of the present invention.

FIG. 7 is a plan view for explanation of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gate 1a Door body 1b Gate post 1c Operation room 2 Natural drainage channel 2a Upstream waterway 2b Downstream waterway 2c Main waterway 3 Dust remover 3a Dust conveyor 4 Suction tank 4a Machine frame 5 Pump 5a Suction port 6 Forced drain pipe 6a Non-return Valve 7 Gutter pipe 8 Backflow prevention gate 8a Elevating gate 8b Flap gate 9 Discharge water tank

Claims (4)

[Claims] 1. A dust remover is set up and down in a channel upstream of a gate installed in a natural drainage channel, and a downstream channel of the gate communicating with a main channel downstream of the natural drainage channel is formed by a gutter pipe. A forced drain pipe that connects the upstream water channel between the dust remover and the gate and the gutter pipe of the downstream water channel of the gate is disposed along the natural drain channel, a check valve is provided in the forced drain pipe, and the gate is provided. A forced drainage system comprising: a pump for forcibly draining water from an upstream waterway to a gutter pipe downstream of a gate through a forced drainage pipe; and a backflow prevention gate provided at a downstream end of the gutter pipe. 2. A dust remover is set up and down in an upstream channel of a gate installed in a natural drainage channel, and a downstream channel of a gate communicating with a main channel downstream of the natural drainage channel is formed by a gutter pipe. A discharge water tank is provided between the gate and the gutter pipe, and a forced drain pipe communicating the upstream water passage between the dust remover and the gate and the discharge water tank downstream of the gate is provided along the natural drainage passage. , A check valve is provided in the forced drain pipe, a pump is provided for forcibly draining water from the upstream waterway of the gate to the discharge water tank downstream of the gate through the forced drain pipe, and a backflow prevention gate is provided at the downstream end of the gutter pipe. A forced drainage facility. 3. The forced drainage system according to claim 1, wherein the backflow prevention gate comprises a lift gate. 4. The forced drainage system according to claim 1, wherein the backflow prevention gate comprises a flap gate.