JPS5826108A - Movable dam - Google Patents

Abstract

PURPOSE:To easily raise and bring down the door plate of a dam by a method in which an expandible bag of a pillow shape is attached to the downstream side of the door plate pivotally attached to the river bed and air is sent into or discharged from the bag for expansion or shrinkage. CONSTITUTION:When raising a bag 7 by sending air into it, a door plate 3 is erected at its lower end as a supporting point and overflow water is flowed down from the upper end of the door plate. When discharging the air of the bag 7, the bag is flattened and the door plate 3 is fallen down and lapped on the flattened bag, whereby permitting river water to flow.

Description

[Detailed Description of the Invention] Book IIaIll! The lower end of the steel door body is pivoted to the riverbed,
This invention relates to a movable dam in which the door body can be raised and lowered according to the water level.

Conventionally, in this type of dam, the gate body is generally supported from the downstream side by a hydraulic cylinder, and the tilting angle of the gate body is adjusted by operating the wrinkle hydraulic cylinder. For this reason, for example, the sliding parts of the hydraulic cylinder may become distorted or curved due to boulders, sedimentation (stones), or even ground movements such as earthquakes or ground subsidence, making it difficult to raise and lower the door body smoothly. There were drawbacks. In addition, hydraulic cylinders had many disadvantages, such as being structurally complex and requiring high equipment costs, as well as being complicated to operate and requiring skill.

The purpose of the present invention is to provide a movable weir that eliminates such conventional drawbacks, and is designed to provide a movable weir in the form of a bag-shaped pile that is expandable and deflated downstream of the gate without using a hydraulic cylinder or the like. The structure is such that the door plate can be raised and lowered according to the expansion and contraction of the cough bag body.

The present invention will be explained below by way of one embodiment with reference to the drawings. As shown in Figure 7, there are steps in the river bed 1 in the transverse direction! In order to form a low floor part 1a on the downstream side, 3 is a steel door body having a length matching the width of the river, and a shaft cylinder 4 is integrally provided at the lower end. 1 is an anchor bolt arranged in a row near the step position of the low floor part 1a, and a support shaft is provided at the top of each anchor bolt S to be slidably inserted into the shaft tube 4; It is rumored to have a long length, and the metal body is made of Oka-Nao II, making it a flexible rubber-like bag. Mounting holes (not shown) through which the anchor hole device is inserted are provided in the mounting piece 3 in a row. In addition, an inlet/exhaust pipe (Ill not included) is connected to one end of the bag I so as to communicate with the inside of the bag.

1. The anchor holes (not shown) are inserted through the respective anchor holes (I), and a support shaft 6 is provided at the top of the anchor hole (I).
By inserting the stem tube 4 through and aligning the door body 3, the bag body 1 is brought into a state where the lower surface of the mating piece 3 pressed by the upper stem tube 4 is in contact with the riverbed (low floor part 1 m). Disliked.

The movable weir of the present invention configured in this way has a bag body! When air is forced into the bag body 1 and the bag body 1 is expanded and erected, the door body 1 will be erected using its lower end as a fulcrum in response to the erecting of the bag body 1. Overflow water is discharged from the top. Then, the upstream water level can be adjusted freely according to the rising height of the door body 3 according to the state of expansion and standing of the bag body T! Since it is possible to do this, the amount of air injected into the bag body 1 can be freely adjusted. In addition, for sharpeners that do not need to be used as a weir, if the air inside the casting body 7 is exhausted, the bag body becomes flat as shown in Figure 2, and the door body 3 is overlapped on top of it, and the metal body becomes flat. The low floor part 11 fits within the step 3 and is in contact with the riverbed, so it does not impede the flow (also, the bag body is covered by the door body 3 and will not be damaged.

As is clear from the above-described embodiments, the movable weir of the present invention has a steel door body whose lower end is pivoted on the river bed, supported in the form of a pile by a bag body that can be expanded and contracted from the downstream side.
Since the door body is erected according to the degree of expansion and erecting of the bag body, unlike conventional hydraulic cylinders, this bag body will not be disturbed by ground movement etc. Because the whole of the Nagajiga is supported by the bag, there is no local deterioration due to the water pressure of running water, and it can be stored and used for a long period of time. Furthermore, it has many advantages, such as having a compact structure, economical equipment costs, and easy operation.

[Brief explanation of drawings]

The drawings relate to one embodiment of the present invention, and FIG. 1 is a diagram showing a state in which it is used, cut in the direction of flow, and FIG. 1 is a diagram showing a state in which it is not in use. 1...River bottom, 3...Steel door body, 4...Shaft cylinder. 6...Support shaft, M...Rubber I! ! 1 body. Patent applicant Kiyoshi Kobayashi

Claims (1)

[Claims] A hinge part is formed at the lower end of the steel door body, the hinge part is pivotally attached to the river bed, and the hinge part is attached in a direction that crosses the flow, and the rubber Il1gR body is formed on the downstream side of the steel door body so as to be expandable and contractible. is attached to the door body in the form of a stake, and the movable weir is configured to maintain the upright and collapsed states of the door body by sending air into the inside of the bag body to inflate and contract.