JPS5912268Y2 - rubber compound weir - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rubber weir that rises and collapses by injecting and discharging fluid, particularly a weir that adjusts the flow rate or storage volume of rivers, etc., and a weir for fish passages attached to dams, etc.

In recent years, rubber weirs have been put into practical use that are installed across rivers, etc., and rise and fall when fluid is injected and discharged.

Rubber weirs are usually installed as a single unit over the entire width of a river, etc., so if a crack occurs and the enclosed fluid is released into the atmosphere, the rubber weir collapses and cannot perform its original function. There is also a risk that the dammed water will flow downstream and cause flooding.

Additionally, fish ladders attached to dams and the like have conventionally been made of concrete and shaped like steps.

With such a fixed type fishway weir, there is a fixed structure within the river, and even if water is released from the dam during abnormal water rises, the fishway weir will stop the water flow, so there is no risk of flooding on the upstream side of the river. This has the disadvantage that the flow and width of the river cannot be used effectively.

The present invention eliminates the above-mentioned drawbacks and provides a weir that can be collapsed so that the amount of discharge can be adjusted even during abnormally high water levels and does not exist as a fixed structure even when used as a fish ladder. A rubber weir body that rises and collapses as a result of pouring and discharging, consisting of two strips stacked one on top of the other, one side of which is joined over the entire longitudinal direction, and the joined part forms a protruding part when inflated. A rubber weir is characterized in that a plurality of rubber weirs are arranged in parallel and installed across a river, etc., and the effective weir height of each rubber weir is successively lowered in the downstream direction.

Next, the present invention will be explained with reference to the drawings.

In Figures 1 and 2, reference numeral 1 denotes a movable weir installed on the river bed 2 across the river in order to dam the river water and take water for industrial or agricultural use, and is similar to the one used for the fishway weir described later. It is constructed with a rubber weir that rises and falls when fluid is injected and discharged.

3 shows a fishway weir which is an embodiment of the present invention and is attached to the movable weir 1.

This fish passage weir 3 consists of a plurality of rubber weirs 4, 4', 4'' (three in the illustrated example) that are raised and collapsed by injecting and discharging fluid. This is achieved by installing them on the river bed 2 at appropriate intervals so that the height gradually decreases.

An example of a rubber weir used in the present invention is shown in Fig. 3.

In the illustrated example, 4 indicates a rubber dam body reinforced with canvas 5 or the like.

The rubber weir main body 4 consists of a swollen part 4a that becomes tubular by injecting fluid such as air or water, and a plate-like part 4b that extends integrally along one side of the swollen part 4a in the longitudinal direction.

To form the rubber weir main body 4 shown in FIG. 3, for example, two sheets of raw raw rubber are placed one on top of the other on a heat surface plate of a certain type plate, and the intermediate region between the raw raw rubber sheets is shaped in the longitudinal direction. A mold release material may be interposed in a certain region along which a swollen portion is defined, and then integrally pressed or shaped at the vulcanization temperature of the raw rubber sheet material.

At this time, a desired reinforcing layer can be obtained by appropriately embedding the rubberized canvas 5 or the like between the raw rubber sheets.

The rubber dam main body shown in FIG. 3 is a preferred example of the present invention, and the present invention is not limited thereto. For example, only one side of the rubber dam main body may be joined.

The present invention will be explained below regarding a rubber weir having the structure shown in FIG.

To form the fishway weir 3 by fixing the rubber weir body 4 to the river bed 2, anchor bolts 6 are buried in the river bed 2 in advance, as shown in FIG. While positioning the shaped part 4b on the upstream side (the direction of the river flow is arrow A), the anchor bolt 6 is inserted into a through hole (not shown) provided in the plate shaped part 4b, and the abutment plate 7 is applied. Fix with nut 8.

In this way, a plurality of rubber weirs 4.4', 4'' are fixed to the riverbed 2 to form the fishway weir 3 of the present invention.

In this case, a rubber weir 4 with the highest weir height is installed on the riverbed 2 almost on an extension of the movable weir 1.

The height of rubber weir 4 is 20 to 30 cm higher than that of movable weir 1.
It is desirable that the height of the weirs be as low as possible, and then the rubber weirs 4/ and 4/I are arranged in parallel at appropriate intervals on the downstream side so that the weir heights are successively lowered by about 20 to 30 crn.

In the illustrated example, the fish passage weir 3 is shaped using three rubber weirs.
The present invention is not limited to this, and a plurality of rubber weir bodies can be arbitrarily selected depending on the height of the movable weir. By filling the weir body 4.4', 4'' with fluid, the fishway weir 3 is shaped as shown in FIGS. 2 and 4.

In a fishway weir with the rubber weir body in an upright state, the joint on the side facing the plate-like part 4b of the rubber weir body exists as a protrusion, so river water flows from the upstream side to the downstream side in the direction of arrow A. The river flows down at a gentle slope, making it easy for fish to swim from the downstream side to the upstream side.

When agricultural water or industrial water is not taken, or when water increases abnormally due to flooding, etc., both weirs 1 and 3 collapse simultaneously by releasing the fluid sealed inside the movable weir 1 and the fishway weir 3 into the atmosphere. (See Figure 5) Therefore, there are no fixed structures in the river, and the water flow of the river flows smoothly downstream.

In particular, when using a belt-shaped integral press-molded rubber weir body as shown in Figure 3, the lodging shape becomes flat regardless of the thickness, which not only makes the flow of the river smoother but also prevents rolling stones and other objects. It has very strong durability.

In addition, when the water intake 9 is installed on the river bank slope on the fishway weir side as shown in Figure 2, by lowering only the fishway weir as appropriate, the sediment accumulated on the upstream side of the weir can flow out to the downstream side. By doing so, the efficiency of water intake by the water intake port 9 is improved.

In the illustrated example of the fish passage weir, the rubber weir bodies 4, 4' and 4'', which are arranged in parallel from the upstream side, are separated from each other at appropriate intervals when they are erected and inflated due to the inclusion of fluid. The rubber weir bodies may be arranged in parallel so that they are in contact with each other.

In addition to the illustrated example, the height of the rubber weir 4.4', 4'' can be changed substantially by making the river bed into a staircase shape and attaching a rubber weir body having the same diameter to each step. Of course it's a good thing.

Although the illustrated example describes a fishway weir attached to a movable weir installed in the main stream of a river, the present invention is not limited to this.

That is, the present invention is a rubber compound weir installed in the main stream of a river that also functions as a fishway weir, and the fishway weir 3 itself shown in FIG. 2 constitutes the movable weir 1.

In this case, by appropriately adjusting the weir height of each rubber weir body or increasing the number of rubber weirs used, it is possible to freely shape the fishway to facilitate fish access.

According to the rubber compound weir of the present invention, each rubber weir body can be raised and collapsed by pouring and discharging fluid.
By appropriately controlling the lodging, the amount of water stored can be freely adjusted.

Therefore, during abnormal water rises, the water volume can be gradually increased by gradually lowering the rubber dam body, which has a high dam height, without releasing the water all at once, thereby reducing the risk of flooding downstream. It disappears.

However, by keeping the amount of water stored (depth of water stored) constant, the amount of water intake can also be kept constant.

Furthermore, the substantial reduction in the weir height effectively prevents gouging of the riverbed on the downstream side, which would be a problem when a movable weir with a single high weir height is used.

As is clear from the above explanation, the rubber compound weir of the present invention can effectively utilize the flow and width of the river.

[Brief explanation of drawings]

Fig. 1 is a front view of a fish passage weir installed in a river as an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view showing an example of the rubber weir body used in the present invention, Fig. 4 5 and 5 are cross-sectional views taken along line IV--IV in FIG. 2, showing the upright and collapsed states of the fishway weir, respectively, and FIG. 6 is a cross-sectional view showing another example of the rubber compound weir of the present invention. 1...Movable weir, 2...River bed, 3...
...Fishway weir (rubber compound weir), 4.4', 4''...
・Rubber weir body, 4a...Swelling part, 4b...
... plate-like part.

Claims (1)

[Scope of utility model registration request] A rubber weir that rises and collapses when fluid is injected and discharged is a rubber weir in which two strips are stacked one on top of the other, one side of which is joined over the entire longitudinal direction, and the joined part forms a protruding part when inflated. A compound rubber weir characterized in that a plurality of weir bodies are arranged in parallel and installed across a river, etc., and the effective weir height of each rubber weir is successively lowered in the downstream direction.