JPS6235688Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a multi-stage roller gate device.

An outline of the conventional device will be explained with reference to FIGS. 1 to 3.

Gates 1 to 5 are comprised of gates 1 at the top to gate 5 at the bottom. Although the number of stages of gates is five in the illustrated example, it is determined by the maximum water depth 12 and minimum water depth 13 of the water storage depth of each dam, and is generally about three to six stages. Reference numeral 6 indicates an opening/closing machine for lifting or lowering the gates 1 to 4, and 7 indicates an opening/closing machine for lifting or lowering the gates 2 to 5. 8 is water control gate, 9
10 indicates a water control gate opening/closing machine, 10 indicates a water intake pipe, and 11 indicates a screen.

When taking surface water, the water passes through the upper part of the uppermost gate 1, passes between the dam body 19 and the roller gates 1 to 5 as shown by the arrows, and is discharged downstream through the water intake pipe 10. 14 is a roller for guiding each gate, 15 is a door groove for storing the roller 14, and 16 is a door for transmitting the water pressure acting on the gates 1 to 5 to the concrete pier 22 protruding from the dam body 19. Indicates a hit. Usually, the number of door grooves 15 is the same as the number of gates. 23 is a cable such as a wire rope.

However, in the conventional multi-stage roller gate device described above, the gates 1 to 5 are connected in such a way that the upper gate suspends the adjacent lower gate, and it is not possible to separate the adjacent gates vertically. In order to take in water from the middle layer, it was necessary to lower the top gate 1 to the middle layer as shown in FIG. In this case, effective selective water intake was difficult due to entrainment from above the middle layer.

This invention attempts to eliminate the above drawbacks.
It is an object of the present invention to provide a multi-stage roller gate device that can effectively take water into an intermediate layer that can supply high-quality water at an appropriate water temperature.

The present invention will be explained below based on an embodiment shown in FIGS. 5 to 11. In the figure, parts equivalent to those of the conventional example are given the same reference numerals. 1a indicates the upper gate, and 2a and 3a indicate the lower gate.
The height of gate 1a is approximately equal to the sum of the heights of gates 2a and 3a, and the heights of gates 2a and 3a are approximately equal. In order to prevent water from leaking between the gates 1a and 2a, a projecting plate 20 is provided on the gate 2a. Reference numeral 6 indicates an upper gate opening/closing machine, and 7 indicates a lower gate opening/closing machine. Note that the number of stages of each gate on the upper stage side and the lower stage side can be selected as appropriate.
Other things are the same as before.

When taking water when the dam water level is high, the fifth
As shown in the figure, water is taken in by fully extending the gates 1a, 2a, and 3a. When the water level is low, the upper gate 1a is rolled up and the lower gate 2a is lowered, as shown in FIG. 6, so that water can be taken in exactly the same way as in the past. At intermediate water depths, water is taken in by lowering the upper gate 1a, as shown in FIG.

When water is taken from an intermediate layer that can supply high-quality water at an appropriate water temperature, the upper and lower gates are separated vertically and gate 1 is used as shown in Figure 9.
Slit-shaped water intake is possible by leaving a gap 21 between the lower end of gate 2a and the upper end of gate 2a.

In addition, FIG. 10 shows an example of how to hang the cable body 23 between the gates 2a, 3a on the lower stage side and the opening/closing machine 7.

In addition, the arrangement of the gates 2a and 3a on the lower stage side was changed to 11th.
They may be switched back and forth as shown in the figure.

In the conventional devices shown in Figures 1 to 4, if the water intake range (difference between the maximum water depth 12 and the minimum water depth 13) is large and the minimum water depth 13 is absolutely small, the height of each gate must be lowered. Therefore, the number of steps of the gate increases, and the number of door grooves 15 also increases proportionally. Along with this, the amount of overhang 18 of the concrete pier 22 increases, and as the amount of overhang 18 increases, the thickness 17 of the pier 22 also increases. As the number of stages of gates increases, maintenance and inspection of gates becomes difficult and complicated, and pier 22
The amount of overhang18 increased, and an increase in civil engineering work was inevitable.

As shown in this embodiment, if the height of the upper gate is made higher than that of the lower gate, the number of gate stages can be reduced and maintenance and inspection can be facilitated.

Furthermore, since the number of stages of gates can be reduced, the amount of overhang of the pier can be short and the thickness can be thin. In other words, it can be made smaller, reducing civil engineering costs. Furthermore, since the number of door grooves is reduced in proportion to the number of gates, there are fewer watertight rubber sliding parts and therefore less water leakage.

As described above, according to the device of the present invention, the lower gate is flexible and has two stages, and can be suspended at the lower end of the upper gate and the upper end of the lower gate. The gate and the upper gate, which are approximately the same length, can be separated vertically, and are equipped with an opening/closing machine that raises and lowers the upper and lower gates independently, so the upper gate can be separated from the lower gate. By raising and lowering the gates independently, it is possible to create an arbitrary distance between the lower end of the upper gate and the upper end of the lower gate at an arbitrary depth. Therefore, it is possible to effectively take in any amount of high-quality middle-layer water at an arbitrary depth and at an appropriate temperature without involving the upper layer water. In addition, since only the upper gate can be raised above the water surface, the minimum water intake height is determined by the height of the lower gate, regardless of the height of the upper gate, so the minimum water depth can be adjusted. By raising and lowering the upper gate while keeping the lower end of the upper gate connected to the upper end of the lower gate, upper water can be taken in regardless of the water level in the dam.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional multistage roller gate. Figures 1, 2, and 4 are cross-sectional views, Figure 3 is a view along the - line in Figure 2, and Figures 5 to 1.
Figure 1 shows an embodiment of the present invention.
Figures 6, 8, 9, and 11 are sectional views, Figure 7 is a view taken along the - line in Figure 6, and Figure 10 is a perspective view showing how to hang the cable between the gate and the opening/closing machine. It is. 1a...Upper side gate, 2a, 3a...Lower side gate, 6, 7, 9...Opening/closing machine, 8...Water control gate, 10...Intake pipe, 11...Screen,
12...Maximum water depth, 13...Minimum water depth, 14...
Roller, 15... Door ditch, 19... Dam embankment body, 22
...Pier, 23...chord.

Claims (1)

[Scope of utility model registration request] The lower gate is flexible and has two stages, and is suspended from the lower end of the upper gate and the upper end of the lower gate, and the upper gate has approximately the same length as the lower gate. A multi-stage roller gate device characterized in that it is configured to be separable into upper and lower parts and is equipped with an opening/closing machine that independently raises and lowers the upper and lower side gates.