JPH0432890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an automatic lodging weir used in rivers.

``Prior art'' In conventional hollow box-shaped weir doors, the strong torsional force due to the water pressure applied to the upstream pressure-receiving surface concentrates on the rotation shaft provided at the bottom of the end face on the channel wall side, causing damage to that part and causing the weir door to close. There was a risk of damage, and the watertightness between the bottom of the waterway and the lower part of the weir door was insufficient (Utility Model Publication No. 54-14420).

``Problems to be Solved by the Invention'' The present invention can safely withstand strong torsional force due to water pressure applied to the upstream pressure receiving surface of a hollow box-shaped weir door, can form a weir door with a small thickness, and can The aim is to obtain an automatic lodging weir with good waterway quality.

"Means for Solving the Problems" The present invention provides a rotary shaft protruding from the lower end of the channel wall side of the hollow box-shaped weir door, and extends the coaxial shaft into a machine room provided outside the channel wall. In the undulating weir, in which a driving cylinder is connected to an arm provided in An arcuate plate is provided on the upstream side of the lower surface of the weir door, bulging upstream from the side pressure receiving surface and following the arcuate portion, and the lower surface of the downstream weir door of the plate is freely supported on the bottom of the waterway, The rotation shaft is provided via a flange fixed to the weir door and the end face of the hollow cylinder on the waterway wall side, and is provided on the same center line as the center line of curvature of the circular arc, and is located on the bottom side of the upstream waterway. The distal end of the provided elastic water stop plate is constituted by an automatic lodging weir in which the distal end portion is in contact with the circular arc-shaped bulge surface.

"Operation" Therefore, when the driving cylinder is operated and the rotation shaft is rotated through the arm, the hollow box-shaped weir door moves from the collapsed position (the position shown by the imaginary line in Figure 5) to the upright position (the position shown by the solid line in Figure 5). Rotate to maintain an upright position. River water is stored on the upstream side of the standing weir door, the water level rises, and water pressure is applied to the weir door. As the water pressure pushes the weir away from the waterway wall, twisting force is applied to the weir door toward the downstream side, but because it is a hollow box, the weir door does not bend. Although the twisting force tends to concentrate on the rotating shaft, it is dispersed from the horizontal hollow sealed cylinder to the flange, and the influence of the twisting force on the rotating shaft is reduced. When the water level reaches the flood danger level, the cylinder operates and the weir door collapses. In addition, since the tip of the elastic water stop plate is in contact with the arc-shaped bulging surface, water is sufficiently stopped, and the water stop plate is easily pressed into contact with the water stop plate because it bulges in an arc shape from the upstream pressure receiving surface of the weir door. The weir door rises and falls while it is in a press-contact state, which is sufficient to stop water, and the arc-shaped bulge improves the strength of the hollow box-shaped part of the weir door, so the thickness of the hollow box-shaped part should be made thin. I can do it.

Embodiment A hollow box-shaped weir door 1 is formed by having a hollow box-shaped portion 1' at the bottom and extending its upstream pressure-receiving surface 9 upward. A horizontal hollow sealed cylinder 7 is provided on the lower surface of the weir door 1 on the side of the waterway wall 2, and the outer diameter of the cylinder 7 is made larger than the thickness of the hollow box-shaped part 1'. bulge upstream. Following this upstream arcuate portion 8, an upstream arcuate plate 10 is provided on the lower surface of the hollow box portion 1'. Then, the bearing plate 14 provided on the downstream inner surface of the circular arc plate 10 and the lower surface of the weir door is clamped to the bearing plates 15, 15 protruding from the waterway bottom 11, and both bearing plates 14, 15 are freely supported by the pin 16. . and a hollow box-shaped part 1' and a hollow closed cylinder 7.
A horizontal rotation shaft 3 is protruded through a flange 12 fixed to the side end face of the water channel wall 2, and is extended into a machine room 4 provided outside the water channel wall 2. A driving hydraulic cylinder 12 is connected to 5. The horizontal hollow sealed cylinder 7 may be provided at both ends of the weir door 1 as shown in FIG. 1, or only at one end as shown in FIG. The center line is made to coincide with the center line of curvature of the upstream circular arc portions 8 and 10. The position of this center line is on the lower side of the step formed on the waterway bottom 11,
Elastic waterstop plate 13 made of rubber or the like bolted to the upper side
The distal end thereof touches the bulging surface of the arcuate portions 8 and 10. In the figure, 17 indicates a control room, 18 indicates a water introduction hole, and 19 indicates a float housed in the same hole 18. The cylinder 1 detects the rise and fall of the float (water level rise and fall).
By automatically controlling the switching solenoid valve No. 2, the weir door can be automatically lowered at the flood dangerous water level. 20 is the control device, 21 in FIG. 2 is a bolt, 22 in FIGS. 3 and 4 is a reinforcing bone, and 23 is a water stop plate.

"Effects" Since the present invention is constructed as described above, the torsional force between the water pressure applied to the pressure receiving surface of the weir door and the rotating shaft at the lower end face supporting the weir door is dispersed, and the twisting force is safely applied to the rotating shaft. Therefore, the weir door can not only be supported in an upright state, but also the hollow box-shaped portion of the weir door can be made thin, resulting in a weir door that is lightweight, strong, and has good water-tightness.

[Brief explanation of drawings]

FIG. 1 is a front view showing the automatic lodging weir of the present invention, FIG. 2 is a side view taken along line A-A in FIGS. 1 and 6,
Figure 3 is a side view taken along line B-B in Figures 1 and 6, Figure 4 is a side view taken along line C-C in Figures 1 and 6, and Figure 5 is a side view taken along line D-D in Figure 1. 6 is a front view of another embodiment of FIG. 1, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a side view of FIG. 6 as viewed from the right. 1...Hollow box-shaped weir door, 2...Waterway wall, 3...Rotating shaft, 4...Machine room, 5...Arm, 6...Driving cylinder, 7...Horizontal hollow sealed cylinder, 8... Arc-shaped portion, 9... Upstream pressure receiving surface, 10... Arc-shaped plate,
11... Channel bottom, 12... Flange, 13... Elastic water stop plate.

Claims (1)

[Claims] 1 A rotating shaft is provided protruding from the lower end of the waterway wall side of the hollow box-shaped weir door, the same shaft is extended into the machine room provided outside the waterway wall, and a driving cylinder is connected to the arm provided on the same shaft. In the undulating weir, a horizontal hollow hermetic tube whose upstream side is arcuate is provided on the lower surface of the weir door on the waterway wall side, and the arcuate portion bulges upstream from the upstream pressure receiving surface of the weir door and is circular. Following the arc-shaped part, an arc-shaped plate is provided on the upstream side of the lower surface of the weir door, and the lower surface of the weir door on the downstream side of the plate is freely supported on the bottom of the waterway, so that the rotation shaft is connected to the weir door and the hollow tube. The tip of the elastic water stop plate, which is provided via a flange fixed to the end surface of the waterway wall and is provided on the center line common to the center line of curvature of the arc, and is provided on the bottom side of the upstream waterway, is connected to the end of the waterway wall. An automatic lodging weir that is in contact with an arc-shaped bulge.