JPH01121409A - Drainer site - Google Patents

Abstract

PURPOSE:To reduce the occupying area of gate as well as simplify gate control by providing a gate to selectively switch test operations on forced discharging and natural discharging by a drainer at the branching point from a branched waterway to the main waterway. CONSTITUTION:A branched waterway 3 is connected with the main waterway 2 through an effluent channel 5 and an inlet section 5, and a drainer 7 is provided between the waterways 3 and 2. The selective interruption of the effluent channel 4 and the inlet section 5 and also of the outlet 7B of the drainer 7 or the connection of both is allowed to switch to each other by a gate G. Natural effluence can be selectively made by interrupting between the channel 4 and the section 5, by forced discharging by operation of the drainer 7, or by closing the outlet 7. Also, during the control operation for preventing the functional deterioration by long-term downtime of the drainer 7, testing operation can be performed by opening between the channel 4 and the section 5 and also the outlet 7B.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is provided between a wide main waterway (for example, the main river) and a small width tributary waterway (for example, the Tachikawa), so that water flowing from the tributary waterway can be It has an adjustment function that allows water to flow naturally into the main waterway, or forcibly drains water flowing from the tributary waterway into the main waterway to prevent flooding of the tributary waterway during floods, as well as a long-term suspension of the drainage means that performs forced drainage. This invention relates to a drainage pump station that can perform controlled operation as a periodic test run in order to prevent functional deterioration.

(Prior art) As this type of drainage pump station, for example, as shown in Fig. 4, a branch waterway C is formed from a tributary waterway (Tachikawa) B that flows naturally into the main waterway (main river)^, and this branch waterway Between C and the discharge tank mouth that discharges water into the main waterway ^, a pump station F equipped with a drainage means E consisting of a pump is interposed, and a tributary waterway B
A gate G1. (1), or, as shown in FIG. The drainage pumping station structure shown in Figure 4 is suitable when the water level to the main waterway is always relatively high, and the drainage pumping station structure shown in Figure 5 is suitable when the water level in the main waterway is relatively low.

Then, at the drainage pump station in Figure 4, the water level of tributary canal B is lower than that of main canal A.
When the water level is higher, gate Gl is opened and gate G2 is opened.
At the same time, by stopping the drainage means E of the pump station F, a natural flow of water from the tributary waterway B to the main waterway ^ is obtained, and the gate G1 is closed and the gate G is opened. , by operating the discharge means E, the water in the tributary channel B is drained through the branch channel C into the discharge tank 0, and from there, the water is discharged into the main channel A, resulting in forced drainage. prevent flooding. Furthermore, in a periodic trial run, that is, a control operation, which is performed to prevent functional deterioration due to long-term suspension of the drainage means E, gates G, G2 are opened, and the drainage means E is operated to circulate water in the direction of arrow a. It will be done.

On the other hand, at the drainage pumping station in Fig. 5, gate G is opened, gates G, , G are closed, and drainage means E is stopped, so that the water level in tributary waterway B is lower than the water level in six waterways A. When water is high, natural flow of water from tributary channel B to main channel ^ is obtained, gates G, , Gs are blocked, and gate G
2 and by operating the drainage means E, the water in the tributary waterway B is forcibly drained to the main waterway as in the case of FIG. 4. In addition, the management operation is performed by gate GL,
This is done by closing G2, opening gate G, and operating drainage means E to circulate water in the direction of arrow a.

(Problems to be Solved by the Invention) However, since the above-mentioned drainage pump station requires an extremely large installation space in terms of plane, there are spaces where construction is practically impossible due to space constraints. Moreover, the drainage pump station shown in Figure 4 requires two gates G+ and G2, which increases the number of gates used.
, , G must be selectively opened and closed separately depending on the purpose, and this opening/closing control is relatively complicated. Furthermore, in the drainage pump station shown in Fig. 5, it is necessary to add a gate G3 and a bypass waterway ■, which increases the number of gates and complicates the structure. This has problems such as the opening/closing control for selectively opening and closing G.

The present invention was developed in view of these circumstances, and it aims to reduce the space in terms of space to avoid space constraints, simplify the structure, and reduce the number of gates used for opening and closing. The purpose is to provide a drainage pump station that can be easily controlled.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a discharge part for discharging water into the main waterway, an introduction part for introducing water from the tributary waterway, and a combination of the discharge part and the introduction part. It has a communication part that communicates with each other,
A forced discharge position where the suction port of the drainage means is opened to the communication portion and a discharge port is opened to the discharge portion, and the communication portion downstream from the suction port is closed; and a natural flow position where the discharge port of the drainage means is closed. and a gate that is selectively positioned by vertical movement to a management operating position for opening both the communication portion and the discharge port.

(Function) According to the present invention, the gate can be placed in three selected positions, namely, a forced discharge position where the communication portion corresponding to the downstream side of the suction port of the drainage means is closed, and a natural flow position where the gate is closed off the discharge port of the drainage means. By locating the position and the management operation position where both the communication part and the discharge port are opened, the water in the tributary canal can be forced to be discharged (drained) into the main canal, the water in the tributary canal can be allowed to flow naturally into the main canal, and It is possible to ensure a state in which water can be circulated for controlled operation of the drainage means.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a vertical sectional side view showing one embodiment of a drainage pump station according to the present invention. In particular, in this figure, the gate G is positioned at the forced discharge position. 1 is interposed between a wide wooden waterway (for example, for wood) 2 and a small width tributary waterway (for example, Tachikawa) 3.

A discharge part 4 for discharging water into the main waterway 2 is formed on the main waterway 2 side, and an introduction part 5 for introducing water from the tributary waterway 3 is formed on the tributary waterway 3 side, and these discharge parts 4
and the introduction part 5 are communicated with each other by a communication part 6 having a bottom face 6A at a lower position dug down than the respective bottom faces 4^, 5A.

Reference numeral 7 indicates a drainage means, which is constituted by, for example, a chamber axial mixed flow pump. This drainage means 7 is disposed in a storage chamber 8 formed above the communication section 6, and penetrates a partition wall 9 between the communication section 6 and the storage chamber 8 to insert the suction lower ^ into the communication section 6.

Then, the discharge lower B is connected to the discharge chamber 1 adjacent to the storage chamber 8.
0, and the discharge chamber 10 is equipped with a check valve 11 such as a flap valve.
It communicates with the discharge part 4 via a discharge pipe 11 equipped with ^.

The gates G are through holes 13 and 14 formed in the ceiling 10A of the discharge chamber 10 and the partition wall 12 between the discharge chamber 10 and the communication section 6, respectively.
It is movable up and down along the vertical axis C by a lifting mechanism (not shown), and is positioned at a selected predetermined position. That is, as shown in FIG. 1, there is a forced discharge position in which the communication portion 6 downstream of the suction lower A of the drainage means 7 is closed, and as shown in FIG. 2, there is a natural flow position in which the discharge lower B of the drainage means 7 is closed. position, and the communication part 6 as shown in FIG.
and the discharge lower B are opened, respectively, and the control operation position is positioned to perform a control operation as a periodic trial run. 7 in the diagram
0 is a rotating main shaft, which is connected to a rotational drive source such as a motor (not shown), and rotates the drainage means 7.

In the above configuration, the gate G is placed at the forced discharge position shown in FIG.
In other words, by positioning the drainage means 7 at a position that closes the communication part 6 corresponding to the downstream side of the suction lower A, and by operating the drainage means 7, the water flows from the tributary waterway 3 through the introduction part 5 to the communication part 6. The inflowing water is sucked in from the suction lower ^ of the drainage means 7, as shown by the arrow Expand the valve 11A to open the water discharge part 4.
It is discharged into the main waterway 2 from here. Therefore, flooding of the tributary canals is reliably prevented.

In addition, as shown in Fig. 2, the gate G is placed in the gravity flow position,
In other words, the discharge lower B of the drainage means 7 is stored in the discharge chamber lO.
The drainage means 7 is positioned at a position where it is blocked.
By stopping the water, the water introduced from the tributary waterway 3 into the introduction part 5 is as shown by the arrow X.

As shown, the water passes through the communication part 6 and reaches the discharge part 4, from where it naturally flows down to the main waterway 2.

On the other hand, in order to prevent functional deterioration due to long-term suspension of the drainage means 7, when performing a controlled operation as a periodic trial run, as shown in FIG.
By positioning the communication portion 6 and the discharge lower B of the drainage means 7 to open positions, and operating the drainage means 7, the water in the communication portion 6 is circulated as shown by the arrow X, and a management operation is performed. be able to.

In this case, if the water level of the tributary waterway 3 is the normal water level, the arrow x
As shown at 4, water also flows down from the communication part B to the discharge part 4, and is discharged from there to the main waterway 2. When the water level of the tributary waterway 3 drops significantly or becomes completely dry, management operation can be carried out by supplying water to the communication section 6 until the water level reaches the position indicated by the water level L1.

(Effects of the Invention) As described above, according to the present invention, there is provided a discharge part for discharging water into the main waterway and an introduction part for introducing water from the tributary waterway, and the suction port of the drainage means is connected to the communication part. and a forced discharge position where the discharge port is opened to the discharge part, and a forced discharge position where the communication part downstream from the suction port is closed, a natural flow position where the discharge port of the drainage means is closed, and both the communication part and the discharge port are closed. Since the structure is equipped with a gate that can be selectively positioned by vertical movement to the control operation position to be opened, it does not require a large space in terms of space, unlike conventional drainage pump stations. It is possible to significantly reduce the stress and simplify the structure. Furthermore, since only one gate is required, there are advantages such as ease of opening/closing control.

[Brief explanation of the drawing]

Figures 1 to 3 are longitudinal side views showing embodiments of the present invention. Figure 1 is a vertical side view in a forced discharge state, Figure 2 is a vertical side view in a natural flow state, and Figure 3 is a controlled side view. FIG. 4 is a schematic plan view of a conventional example, and FIG. 5 is a schematic plan view showing another conventional example. l... Drainage pump station 2... Main waterway 3... Branch waterway 4... Outflow section 5... Introduction section 6... Communication section 7... Drainage means 7A... Suction port AB ...Discharge port G...Gate

Claims (1)

[Claims] (1) A drainage pump station that is interposed between the main waterway and the tributary waterway to allow water flowing from the tributary waterway to flow naturally into the main waterway or to circulate water during the controlled operation of the drainage means, where water flows into the main waterway. The drainage means has a discharge part for discharging water, an introduction part for introducing water from the tributary waterway, and a communication part for communicating these discharge part and introduction part with each other, and the suction port of the drainage means is in the communication part, and the discharge port is in the communication part. A forced discharge position in which each of the discharge portions is opened and a communication portion downstream from the suction port is closed, a natural flow position in which the discharge port of the drainage means is closed, and a management operation in which both the communication portion and the discharge port are opened. A pumping station characterized by comprising a gate that is selectively positioned by moving up and down.