JP3036233U - Automatic control gate that keeps the upstream water level in a rectangular open channel at a fixed planned water level - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an unpowered rectangular automatic open channel control gate that maintains an upstream water level at a fixed planned water level. SOLUTION: Bearings 1 having the same height as a planned upstream water level are provided on the left and right walls of a rectangular open water channel a, and a rotary shaft 2 is horizontally mounted on the bearing 1 and upstream of the rotary shaft 2. A side arm 3 is projectingly provided, and an arc-shaped first skin plate 4 having a predetermined radius length R ₁ is provided from the rotating shaft 2 by engaging the inner wall of the open channel a at this projecting end. First skin plate 4 near the bottom
A predetermined width B having a pressure receiving bottom surface 5 projecting perpendicularly to the above, and a second skin plate 6 concentric with the first skin plate 4 and having a predetermined radius length R ₂ upward from the projecting end of the pressure receiving bottom surface 5.
A float part 7 is attached, and a front-rear balance body 9 is horizontally mounted on the protruding end of a downstream arm 8 protruding from the rotating shaft 2, and the upstream water level is maintained at a fixed planned water level above the rotating shaft 2. A balance body 10 is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an automatic control gate that automatically opens and closes according to an increase or decrease in the flow rate flowing in a rectangular open channel to keep the upstream water level at a fixed planned water level.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, with a hoisting device that detects the flow rate flowing in a rectangular open channel via a medium such as a float or water level gauge, and opens and closes the gate manually or by other power to keep the upstream level constant. However, the present invention does not require such a hoisting device, but the present invention does not require such a hoisting device, and the gate automatically opens and closes according to the increase or decrease of the discharge flow rate to keep the upstream water level at a fixed planned water level. Is provided.

[0003]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

An automatic control gate that automatically opens and closes according to an increase or decrease in the flow rate flowing in the rectangular open channel a to keep the upstream water level at a fixed planned water level. The open channel a is located on the left and right walls of the open channel a. Bearings 1 and 1 which are orthogonal to each other and whose axes are the same height as the planned upstream water level, and the rotating shaft 2 is rotatably mounted horizontally on the bearings 1 and 1, An upstream arm 3 is projected toward the upstream side, and an arc-shaped first skin plate 4 having a predetermined radius length R ₁ from the axis of the rotating shaft 2 is engaged with the inner wall of the open channel a at the protruding end. A pressure receiving bottom surface 5 of a predetermined length is provided vertically toward the first skin plate 4 toward the upstream side near the lower portion of the first skin plate 4, and the pressure receiving bottom surface 5 faces upward from the protruding end. predetermined width having a first skins plate 4 and the second skin plate 6 having a predetermined radius length R ₂ of the concentric Te A float portion 7 is attached, a downstream arm 8 is projected on the downstream side of the rotating shaft 2, and a front and rear balance body 9 for balancing the front and rear of the gate main body G is laterally mounted on the projecting end. A self-regulating gate for keeping the upstream water level in a rectangular open channel at a fixed planned water level, which is provided with a balance body 10 for maintaining the upstream water level at a fixed planned water level above the moving shaft 2. Is.

[0005]

[Embodiment of the invention]

 The embodiment of the present invention will be described with reference to the drawings, which are examples of the embodiment, showing the functions and effects.

The principle of operation will be mainly described with reference to FIG. 1, and the effect will be described.

Now, assuming that the rotation axis of the rotation shaft 2 is O, the action direction of water pressure always acts toward the axis O, and therefore the distance S ₁ from this O to the action line of the center of gravity C of the gate body G ₁ , S ₂ the distance to the line of action of the total pressure P acting on the pressure receiving bottom 5 of the float 7 from O, the total weight of the gate body G (including the weight of the weights for balance) W, single body product of water Assuming that the weight is ω, the water depth of the pressure receiving bottom surface 5 is h, and the mounting tilt angle of the front-rear balance body 9 and the balance body 10 is α, a small surface within the pressure receiving bottom surface 5 with a radius r than O is considered. If the pressure acting on the surface is dp, then dp = ω · B · h · dr, and in this equation h = r sin α. Therefore, dp = ω · B · r sin α · dr. The moment dM ₁ that tries to rotate G clockwise in the figure is

[0008]

(Equation 1)

This ΣM ₁ represents the opening moment of the gate body G, and is equal to the product of the total water pressure P acting on the pressure receiving bottom surface 5 of the gate body G and the distance S ₂ from O thereof.

Next, the closing moment M ₂ of the gate body G is

[0011]

(Equation 2)

The condition for keeping the gate body G in equilibrium at an arbitrary position is M ₁ = M ₂

[0013]

(Equation 3)

Since this formula is independent of the opening / closing angle α of the gate body G, the gate body G maintains equilibrium at an arbitrary position, and when the flow rate from the upstream increases, the upstream water level of the gate body G increases. At the same time, the water pressure acting on the pressure receiving bottom surface 5 of the gate body G increases, so that P · S ₂ increases and the first skin plate 4 rises. When the first skin plate 4 rises, the pressure receiving bottom surface 5 also rises, the water depth h of the pressure receiving bottom surface 5 decreases, the total water pressure P decreases, and the distance between the lower end of the first skin plate 4 and the bottom surface of the open channel increases to increase the flow rate. The rising upstream water level is also discharged downstream as the first skin plate 4 rises, the relationship of P · S ₂ = W · S ₁ is maintained, and the upstream water level is maintained at a fixed planned water level. In this way, this automatic control gate is different from the conventional control gates including the tender gate, and it maintains the true, unpowered upstream water level at a fixed planned water level without the need for a hoisting device to open and close the gate. It becomes an automatic adjustment gate.

[0015]

【Example】

 Embodiments of the present invention will be described with reference to the accompanying drawings.

An automatic control gate that automatically opens and closes according to an increase or decrease in the flow rate flowing in the rectangular open channel a to keep the upstream water level at a fixed planned water level. The open channel a is located on the left and right walls of the open channel a. Bearings 1 and 1 which are orthogonal to each other and whose axes are the same height as the planned upstream water level, and the rotating shaft 2 is rotatably mounted horizontally on the bearings 1 and 1, An upstream arm 3 is projected toward the upstream side, and an arc-shaped first skin plate 4 having a predetermined radius length R ₁ from the axis of the rotating shaft 2 is engaged with the inner wall of the open channel a at the protruding end. A pressure receiving bottom surface 5 of a predetermined length is provided vertically toward the first skin plate 4 toward the upstream side near the lower portion of the first skin plate 4, and the pressure receiving bottom surface 5 faces upward from the protruding end. predetermined width having a first skins plate 4 and the second skin plate 6 having a predetermined radius length R ₂ of the concentric Te For attaching a float section 7 of.

In the illustrated embodiment, the bearings 1 and 1 are constituted by rolling bearing-enclosed plummer blocks, and the left and right end portions of the rotary shaft 2 are fitted into the plummer blocks so that the rotary shaft 2 can be attached to the plummer block. And two upper and lower upstream arms 3 are provided so as to be opposed to each other toward the upstream side of the rotating shaft 2 in the left and right directions, and the protruding end portion has the left and right wall surfaces and the bottom surface of the open channel a. A first skin plate 4 in the shape of an arc having a predetermined radius length R ₁ from the axis of the rotating shaft 2 is provided.

A pressure receiving bottom surface 5 of a predetermined length is provided so as to project upstream from the lower portion of the first skin plate 4 perpendicularly to the axis of the rotation shaft 2, and the rotation shaft is provided upward from the protruding end. The arc-shaped second skin plate 6 having a predetermined radius R ₂ from the axis of 2 is provided, and the vertical plate 6 ′ is attached between the left and right end portions of the skin plate 6 and the first skin plate 4 to attach the first ski plate. An enclosed float portion 7 having a predetermined width B is formed on the front surface of the plate 4.

A downstream arm 8 is provided on the downstream side of the rotary shaft 2, and a front-rear balance body 9 for balancing the front and rear of the gate main body G is laterally mounted on the protruding end, and an upper portion of the rotary shaft 2 is provided. A balance body 10 that maintains the upstream water level at a fixed planned water level will be installed in.

In the illustrated embodiment, two upper and lower downstream arms 8 are provided on the downstream side of the rotary shaft 2 so as to be opposed to each other, and a box-shaped front and rear balance body 9 is provided on the protruding end. An upper cover is attached to the balance box body 9. When there is no water in the open water channel a, ballast weight such as ballast is packed in the front and rear balance body 9 from the upper cover so that the pressure receiving bottom surface 5 is the same as the axis line. It is installed so that it is horizontally balanced at a height.

An arm is erected upright from the rotary shaft 2 in a state of being opposed to each other, and a box-shaped balance body 10 is attached to the protruding end of the arm to open when water is poured into the open water channel a. A balance weight such as a ballast is packed into the box body from the upper cover of the box body so that the upstream water level of the waterway a maintains a desired designed water level.

[0022]

[Effect of the invention]

 Since the embodiment of the present invention is configured as described above, the upstream water level is always maintained at the predetermined planned water level by the buoyancy of the gate main body due to the upstream water level and the balance with the balance body in accordance with the increase or decrease in the flow rate flowing in the open channel. Therefore, the upstream water level in the waterway can be maintained completely automatically, and the winding that keeps the upstream water level by opening and closing the gate with electric power, human power, engine or other power source as in this type of conventional gate. Since the hoisting device is not required, equipment such as a hoisting machine, an operating machine, and an operating room are unnecessary, and the equipment and maintenance cost is extremely small, resulting in an unpowered automatic control gate.

Further, since the upstream water level is always kept constant, stable water intake is possible at all times, and since the configuration is relatively simple and strong, there is no fear of failure and a rectangular shape that is easy to manage is provided. It will be an automatic control gate that can keep the upstream water level in the canal at a fixed planned water level.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an operating principle of an embodiment of the present invention.

FIG. 2 is a schematic side view showing the structure of the embodiment of the present invention.

FIG. 3 is a front view of the above.

[Explanation of symbols]

a Rectangular open channel R ₁ Specified radius length B Specified width G Gate body R ₂ Specified radius length 1 Bearing part 2 Rotating shaft 3 Upstream arm 4 First skin plate 5 Pressure receiving bottom 6 Second skin plate 7 Float part 8 Downstream arm 9 Front-rear balance body 10 Balance body

Claims (1)

[Utility model registration claims] 1. An automatic control gate that automatically opens and closes according to an increase / decrease in the flow rate flowing in a rectangular open channel to maintain an upstream water level at a fixed planned water level. The open channel is provided on the left and right walls of the open channel. The bearings are orthogonal to each other and the axes of both are the same height as the planned upstream water level.The rotating shaft is rotatably mounted horizontally on this bearing, and the upstream arm projects toward the upstream side of the rotating shaft. Set up
An arc-shaped first skin plate, which is engaged with the inner wall of the open channel and has a predetermined radius from the axis of the rotating shaft, is provided at the protruding end.
A pressure receiving bottom surface of a predetermined length is projected toward the upstream side of the lower side of the first skin plate vertically to the first skin plate, and is coaxial with the first skin plate upward from the protruding end of the pressure receiving bottom surface. A float part having a predetermined width having a second skin plate of a predetermined radius length is attached, a downstream arm is projected on the downstream side of the rotating shaft, and the front and rear of the gate main body is balanced at this projecting end. The front and rear balancers are laid horizontally, and the balancer for maintaining the upstream water level at a fixed planned water level is provided above the rotating shaft. The upstream water level in the rectangular open channel is maintained at a fixed planned water level. Automatic adjustment gate.