JPS5852046B2 - Tipping gate for trapezoidal waterways - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a trapezoidal cross-section waterway, which rises and falls in an overturning gate designed to raise the dam of irrigation water. , which attempts to provide a gate whose purpose is to eliminate any obstruction of waterways.

River channel cross sections are generally trapezoidal, formed by a horizontal river bed and slopes on both sides.

Therefore, conventionally, when installing a gate 21A for the purpose of damming a waterway 21 as shown in Figs. , the upper and downstream channels near the weir raising area are widened, and a diversion wall is installed.However, changes in the cross section of the channel tend to cause turbulent flow of water, resulting in damage to the revetment structure, or This causes the remains of sediment and boulders.

The present invention aims to satisfy the following three items.

A. Without changing the cross section of the waterway, weird water can be dammed up by eliminating obstructions when the gate is lowered and raised.

B. To avoid damage from falling objects and abnormal raising that may occur due to blocking falling objects, move machinery such as hydraulic ram cylinders and power transmission devices such as wire ropes and chains to submerged areas. Not provided.

C. The structure will save on not only materials and equipment but also civil engineering costs.

The details of one embodiment of the present invention will be described below with reference to the drawings.

Drive shafts 1, 2.1' are provided on both sides and the bottom of the cross section of the waterway in the direction perpendicular to the flow when viewed from the plane, and the gate body is connected to the triangular gate bodies B, B' on the inclined surface and the central part. It is divided into three rectangular gate bodies A, and each of these gate bodies is rigidly connected to each of the drive shafts.

The above shaft 1°1' has bearings 5A, 5A', 5A#,
In addition, since the shaft 2 receives a large bending moment due to water pressure in addition to the torsional moment, the shaft 2 is supported by seven bearings at both ends and the center.

The installation of this drive shaft 1.2.1' aims to achieve the three goals mentioned above.

Here, the problem of an eccentric drive shaft occurs.

Although the values of eccentric angle (15 degrees to 35 degrees), rotation speed (nearly 1 rotation in 30 minutes), and rotation angle (60 degrees to 75 degrees) are small, eccentric shaft joints transmit large torsional moments. As an example, the Hobson angle joint shown in FIGS. 4 and 5 will be used.

Furthermore, an O-ring 11 is provided at the end of the metal 5 for the same purpose.

A pit C is provided on the water surface of the slope, and the drive shaft 1 is installed in the pit C.
A bearing 5A that protrudes inward and has the same function as the bearing 5A' is provided on the pit wall to support one drive shaft 1.

As shown in FIG. 6, a crank arm 12 is fixed near the tip of the drive shaft 1 in the pit C in a direction perpendicular to the shaft center, and a pin 13 is provided at the tip of the arm.

The hydraulic ram cylinder 14 is installed in the pit.
It is installed on the pit wall in a hinged manner with a pin 15 at the end.

The tip of the hydraulic ram cylinder 14 is connected to the pin 13 mentioned above.

By pumping oil into the cylinder 14, the crank arm 12 rotates.

The drive shaft 1.2.1' has a structure that provides rotational motion.

The gate bodies B, A, and B', which are divided into three parts, have their lower ends rigidly connected to each drive shaft 1.2.1', and the water pressure and own weight are reduced to 1.
shall be transmitted to the drive shaft 1.2.1'.

On the right side of Fig. 9, the drive shafts 1, 2.1' are viewed from the plane as a straight line perpendicular to the flow, and the gate bodies B, A, B'
If we consider that there is no continuous connection between them, and align the upright Blab lines, a fan-shaped space aa'b in the tsuching range will be generated when the lines are laid down.

This means that watertightness cannot be maintained when the gate is half open, so the fan-shaped plate abc, which is the same as the fan-shaped aa'b, is used as the gate body B.
It is assumed that the ab line is provided along B'.

10 and 11 are 01J.

Structure 1 As shown in Figs. 9 and 8, ab is fixed to the triangular gate bodies B and B', and a fan-shaped plate D (abc
) will be established.

Fan-shaped plate D. D' slides in contact with the line a'b of the end of the gate body A, as shown in FIGS. 8, 11, and 1.
As shown in Figure 2, there are fan-shaped plates D, D'(
abc) of the gate body A.
A slide plate 20 is obtained by lining the outer surfaces of the fan-shaped plates D and D' with rust-free steel such as stainless steel.

Fan-shaped play) D and D' do not receive water pressure when standing up, but receive water pressure as they fall down.

Structure 2 In Figures 8 and 9, fan-shaped play) D, D' is <
Divide 121 into two by bisector be of a b a ', and hinge the dividing line be.

When the gate body AKa'b line is hinged to the gate bodies B and B' with the ab line, the fan-shaped play) D and D' will bend and expand and contract at the be line around point b, following the gate undulations. Become.

That is, when the gate is erected, the triangular gate bodies B and B' come together with the eb line as the apex, as shown in FIG.
It follows the slope as the same plane as .

By adopting one of the two structures described above, the present invention, as the trapezoidal cross-section waterway overturning gate described at the beginning, eliminates any obstruction to the waterway when it is collapsed, and also makes it possible to maintain watertightness when it is half open. That is.

In addition, in the figure, 3.3', 3' are eccentric pins, 3A, 3'
3A' is a cylinder hole, 4 and 4' are round steel, 5 is a bearing metal, 6 is a casing, 7 is a bearing metal, 8 and 9 are a casing, and 17 and 17' are sliding plates, respectively.

[Brief explanation of drawings]

The drawings are one example showing the operating method and device structure of the present invention, in which Fig. 1 is a plan view of a general weir earthwork, Fig. 2 is a front view of the same, and Fig. 3 is a front view showing the drive shaft arrangement. Figure 4 shows eccentricity 1
A sectional view showing the drive shaft joint structure, Fig. 5 is a side view of the same as above, Fig. 6 is a side view of the in-pit drive device, Fig. 7 is a plan view of the same as above, and Fig. 8 shows division of the gate. Front view, No. 9
The figure is a plan view of the same as above, FIG. 10 is a plan view centered on the fan-shaped plate, and FIG. 11 is a fan-shaped plate D inside the gate body A,
A plan view showing the structure for storing D', FIG. 12 is same as 1 above.
It is a front view with a part notched. 1.1', 2... Drive shaft, 5A, 5A', 5A
", 5A"'...Bearing, 7A, 7A', 7A"
...Bearing, 10゜11 ...O ring,
12... Crank arm, 13... Pin, 14... Hydraulic ram cylinder, 15...
... Pin, 19 ... Watertight rubber, 20 ...
...Sliding board. A...Central rectangular gate body, B, B'...
・Triangular gate body, C・・・Pit, D, D'・
...Fan-shaped plate.

Claims (1)

[Scope of Claims] 1 Drive shafts 1, 2.1 are rotatable along both river bed slopes of a waterway having a river bed with a substantially trapezoidal cross section and along the central flat river bed.
' are connected with a universal joint, and the gate body is divided into three parts, triangular gate bodies B and B' on the inclined surface, and a rectangular gate body A in the center, and the triangular gate body is in rigid contact with each drive shaft. It has fan-shaped plates D and D' which are fixedly attached to the ends of the rectangular gate bodies A side of the integrated bodies B and B', are stored inside the central rectangular gate body when the gates are raised, and are pulled out when the gates are lowered. An overturning gate for trapezoidal cross-section waterways. 2 Drive shaft 1.2.1 rotatably along both river bed slopes of a waterway having a river bed with a roughly trapezoidal cross section and along the central flat river bed.
' are connected with a universal joint, and the gate body is divided into three parts, triangular gate bodies B and B' on the inclined surface, and a rectangular gate body A in the center, and the triangular gate body is in rigid contact with each drive shaft. It has fan-shaped plates D and D' which are fixedly installed at the inlet end of the rectangular gate body A of the integrated body B and B', and which are stored inside the central rectangular gate body A when the gate is raised and pulled out when the gate is collapsed. , the fan-shaped plates D and D' are divided along the bisector line and rotatably screwed together, and each end is connected between the side ends of the rectangular gate body A and the triangular gate bodies B and B', respectively. An overturning gate for a trapezoidal cross-section waterway, characterized in that the overturning gate is connected to a trapezoidal cross-section waterway, is rotatably screwed at each of the two connecting portions, and is configured to expand and contract according to the undulations of the gate body.