JPH0621943Y2 - Water intake device with lower gate with built-in security gate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a water intake device having a lower gate with a built-in safety gate attached to the safety and functionality of a water intake gate, for example, a linear multi-stage roller gate. .

(Prior Art) Water intake from a dam reservoir is collected from the upper, middle, or lower layers according to the conditions used downstream. The linear multi-stage roller gate is widely used because water can be easily taken from each required layer.

The linear multi-stage roller gate is a pair of piers 2 and 2 projecting from the side wall 1a of the reservoir 1 as shown in FIGS. 8 and 10.
A plurality of door bodies 3 are vertically connected to each other and are hung from the inside surrounded by, and a plurality of door bodies 3 are sequentially moved up and down by switches 5 and 6 installed in a machine room 4 provided at the top of the pier. is there. A screen 7 is stretched at the front ends of the piers 2 and 2 which are water intakes, and a curtain wall 8 is connected to the front ends of the piers 2 and 2 in a plate shape below the front ends of the piers 2 and 2. And is joined to the lower end of the screen 7.

In addition, the water intake device provided with the roller gate includes a lower gate, a security gate 10 and a water control gate 11 which will be described below.
Is provided.

The lower gate 9 is provided at an opening on the outside of the curtain wall of a through hole 12 that communicates between the reservoir side and the inside of the pier 2 and is opened and closed manually at the lower part of the curtain wall 8. 13 is provided near the upper part of the curtain wall 8. And the lower gate 9
It is used when the water intake range of the roller gate cannot be met at the time of water intake, when it is necessary to take water at a position below the minimum water level in the normal water intake range, or when the water storage level is lowered due to an emergency discharge.

The security gate 10 is provided at a position lower than the top of the curtain wall 8 and in front of an opening opening in the wall 1a located between the piers 2 and 2. This opening communicates with the reservoir side via the bypass flow passage 14. ing. Bypass channel located on the reservoir side
A screen 15 is stretched over the opening of 14. The door body of the security gate 10 is connected with a wire and is connected to a counterweight suspended near the machine room 4 through a guide pulley, and is kept in a closed state by a balanced force. Security gate 10
The elevator 16 is also operated by using the switch 16 of the water control gate 11 provided below the security gate 10.

The security gate 10 is installed in order to keep the water level difference between the inside and outside of the door 3 below the design value so that the water level difference above the design value will not be applied to the door body 3 regardless of the state of the door body 3. When the water level difference is large, a force stronger than the tension of the counterweight is applied to the door body, so that the door body opens and water flows out.

Further, as shown in FIG. 11, a bypass flow path 18 that connects the reservoir side and the interior of the pier to the side of the pier is also formed below the height of the top of the curtain wall, and at the opening on the side of the reservoir. There is also a water intake device having a structure in which the security gate 10 is attached. This water intake device can exert its own function regardless of whether the water control gate is open or closed. The same members are designated by the same reference numerals and the description thereof is omitted. The following conventional example is also the same.

Further, as shown in FIG. 12, the curtain wall 21 is provided with a bottom portion 21a which is hardened with concrete up to the lower portion of the door body 3 of the roller gate, and the bottom hole 21a has a communication hole 22 communicating with the inside of the pier.
There is a water intake device having a structure in which a lower gate 24 with a built-in security gate 23 is provided in the opening on the pier side. In this water intake device, the communication hole 22 at the bottom of the pier is common to both gates, and also serves as a switch for hoisting and lowering.

(Problems to be Solved by the Invention) In the first conventional device (FIGS. 8 to 10), since the switch for the lower gate 9 is provided near the top of the curtain wall, the lower gate 9 is operated. When the water level is lower than the minimum water level (L, W, L), when you want to remove water from the bottom or remove sand, you must go down step 20 along the pier and go to the bottom. I won't. If the stage is not installed, it is necessary to go to the lower gate point with the dam management boat from the boat dock and operate it. Moreover, if a dedicated switch is added to the lower gate 9, the gate can be operated and repaired regardless of the water level, but on the other hand, securing or expanding the installation space of the switch, tensioning the wire, opening and closing the gate. It will be necessary to install a guide rail for the equipment, which will increase equipment costs.

The second conventional device (see FIG. 11) has the drawbacks of the first conventional device, requires an opening / closing machine for hoisting the safety gate, and needs to provide a counterweight for balancing the valve body in the safety gate. There is.

Furthermore, in the third conventional device (see FIG. 12), the lower gate 24 has the security gate 23 built-in, but it is still necessary to install a guide rail and the like, and there is sediment in the communication hole 22. In this case, there is a problem that the opening / closing operation of the security gate 23 is hindered and the passage is narrowed so that the flow is bad and the function cannot be exhibited.

The present invention is intended to improve each of the conventional problems, and the lower gate with a built-in safety gate can be operated without fail and the lower gate can be operated without adding a switch. A water intake device having

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pair of peers (30, 3).
(0) is provided with a curtain wall (41) across the lower front edge, a roller gate (31) is provided between the piers so as to be able to move up and down, one end is opened at the top of the curtain wall, and the other end is below the curtain wall. The bypass flow path (4
3) is provided, and a substantially horizontal through hole that communicates the inside and the outside of the curtain wall is formed in the lower portion adjacent to the opening at the other end of the bypass flow passage, and the opening at the other end of the bypass flow passage is formed. Security gate that opens and closes the section
(51) is installed in the frame of the lower gate (47) that opens and closes the through hole, and the lower gate is the lowest door of the roller gate.
It is arranged below (31a), and the lower gate and the door body are detachably provided.

(Operation) Since the present invention is configured as described above, even if the mud and sand accumulated in the reservoir accumulate near the top of the curtain wall (41), they flow to the security gate (51) by the bypass flow passage (43). Since the water flow path is secured, water flows through the bypass flow path when the water pressure difference inside and outside the pier becomes large and the security gate is opened. Also, the lowest door of the roller gate
By hooking the lower gate (47) on (31a), the opening and closing of the lower gate can be operated by an opening / closing machine that raises and lowers the roller gate.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIG. 5, FIG. 6 and FIG. 7, the water intake device provided in the reservoir is constructed from the concrete wall 30a to the pair of piers 3
0, 30 are projected, and a plurality of gates (roller gates, etc.) are arranged between them, and the plurality of gates are connected to the pier 3 via wires.
It is hoisted and unwound by a switch attached to the top of 0,30.

The roller gate 31 is composed of a plurality of doors 31a, ..., 31e, and is provided to be movable up and down by engaging rollers 32 provided on both left and right ends of the door with door grooves 33 formed on a wall surface of a pier. The door bodies are connected in sequence, and the bottom door body 31a is the other door body 31b-31.
It has a stronger structure because it has a larger load than e. Further, switches 35 and 36 are installed in a machine room 34 arranged at the top of the pier in order to move up and down the lowermost door body 310a and the uppermost door body 31e. A water conduit 37 is arranged at the bottom of the base ends of the piers 30, 30 and the opening thereof is closed by a water control gate 39 that can be raised and lowered by an opening / closing base 38 housed in a machine room 34. ing.

The screen 40 is full of water (H, W,
It is extended downward from the vicinity of L) and is stretched, and is joined to a concrete curtain wall 41 standing below the pier below the lowest water level (L, W, L).

As shown in FIGS. 1 and 2, the curtain wall 41 has a hole 42 formed at the lowermost portion so as to penetrate the inside and the outside of the curtain wall 41. Also, the curtain wall 41
A bypass flow path 43 is vertically provided inside, one end has an opening 44 at the top of the curtain wall, the other end penetrates the ceiling portion of the hole 40, and both ends are formed with a plurality of water-conducting steel plates 45 embedded in a pier to form the hole 42. An opening is formed inside the curtain wall 41 in a divided manner. It is also possible to construct the entire bypass channel without using the water-conducting steel plate. In addition,
A screen 46 is placed at the opening of the hole 42 outside the curtain wall.
Extend.

As shown in FIGS. 1 to 3, the lower gate 47 is located below the door body 31a that descends to the bottom of the pier, and is fitted into the groove 48 formed in the pier side wall to form the groove 48 on the inner side wall. In addition, a plurality of side rollers 49 provided on the side surface of the lower gate are in contact with each other as guide rollers when moving up and down. Lower gate 47 door 31
A contact surface with a is expanded laterally, and a relay roller portion 50 (see FIG. 4) for changing the direction of the wire W described later is provided on the upper surface on one side.

Further, an opening 47a is formed above the lower gate 47,
The valve body 52 of the security gate 51 is openably and closably attached to the opening 47a via a hinge 53. One end of the wire is fixed to the valve body 52 on the side opposite to the hinge 53 side by a locking portion 54 of the wire W. The wire W sequentially engages with the plurality of pulleys 55 attached to the lower gate from the locking portion 54, and the relay roller portion
It engages with a pulley group 56 composed of moving pulleys 56a provided near the machine room through 50 and is fixed in the vicinity thereof. Moving pulley 56
A counterweight 57 is hung on a, and a tension is applied to the wire W by its weight.
Is kept closed. When the water pressure applied to the valve body is larger than this tension, the water pressure pushes the valve body 52 open to allow water to flow. This balance can be changed by adjusting the weight of the counterweight 57.

A pin 58 is provided on the left and right arms protruding above the lower gate 47, and the hook 5 is attached to the door body 31a located above it.
9 is rotatably provided by a shaft 60 and is mounted so as to engage with a pin 58. The other end of the hook 59 is the door 31a
A connecting rod to a rotating body 62 mounted around a horizontal axis via a gear or the like on a shaft 61 rotatably mounted at the center of
Connected by 63. This allows the shaft 61
The hook 59 rotates about the shaft 60 by rotating the. To rotate the shaft 61, a handle 64 may be attached to the upper portion of the door body 31a as shown in FIG. Can be operated. Incidentally, 65 is a stairway for raising and lowering, and 66 is a watertight rubber. A screen 44a is also attached to the opening 44.

Next, the operation will be described.

The water control gate 39 is normally open. The safety gate 51 opens the valve body 52 and lifts the counterweight 57 when the water pressure difference between the inside and outside of the pier is larger than the set value. Then, water flows in through the opening 44 to maintain the pressure balance.

After water intake at the fully open position of the roller gate 31 is completed, if further water intake is required, manually operate the handle 64 at the top of the door 31a, and hook 59 to the pin of the lower gate 47.
After fitting with 58, the opening / closing device 35 for raising and lowering the door body 31a is operated to pull up the lower gate 47 together with the door body 31a to perform lower water intake. After the lower water intake is completed, the lower gate 47 is closed and the hook 59 is removed from the pin 58.

If the pin 58 and the hook 59 are set by another automatic fitting / removing method, it is not necessary to lower the water level when repairing and inspecting the lower gate 47. Can be done.

(Effect of the Invention) Since the present invention is configured as described above, since the flow path of the security gate built in the lower gate is secured by the bypass flow path, normal operation can always be performed. Further, since the lower gate can be connected to the lower part of the roller gate, the opening / closing device of the roller gate can also be used, and the facility cost and the construction cost can be significantly reduced. Also, since the lower gate can be lifted up into the air, maintenance and inspection can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of the vicinity of the curtain wall in the embodiment of the present invention, and FIG. 2 is a plan view of the upper half of the curtain wall in the left half and a plan view of the lower part of the curtain wall in the right half. In FIG. 3, the left half is a front view near the lower gate, and the right half is a back view near the lower gate. FIG. 4 is a side view of the roller relay portion in the embodiment, FIG. 5 is a front view of the water intake device of the present invention, FIG. 6 is a side view of the water intake device of the present invention, and FIG. 7 is a view of the water intake device of the present invention. FIG. 8 is a front view of a conventional water intake device, FIG. 9 is a side view of FIG. 8, FIG. 10 is a main part plan view of FIG. 8, and FIG. 11 is a conventional water intake device. Fig. 12 is a plan view of the main part, and Fig. 12 is a cross-sectional view of the main part of the conventional water intake device. 30 ... Pier, 31 ... Roller gate 41 ... Curtain wall, 42 ... Hole 43 ... Bypass passage, 44 ... Opening 47 ... Lower gate, 47a … Opening 51… Security gate

Claims (1)

[Scope of utility model registration request] 1. A curtain wall (41) is provided over the lower front edges of a pair of piers (30, 30), a roller gate (31) is provided between the piers so as to be able to move up and down, and one end is on the top of the curtain wall. A bypass flow channel (43) is provided, the other end of which is open to the inside of the pier at the lower end of the curtain wall, and the inside and outside of the curtain wall are provided at the lower part adjacent to the opening at the other end of the bypass flow channel. A security gate having a substantially horizontal through hole communicating therewith and opening / closing an opening at the other end of the bypass flow passage.
(51) is installed in the frame of the lower gate (47) that opens and closes the through hole, and the lower gate is the lowest door of the roller gate.
A water intake device having a lower gate with a built-in security gate, which is disposed below (31a) and in which the lower gate and the door body are detachably provided.