JPH0699894B2 - High voltage slide gate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a high pressure slide gate used in a dam discharge facility.

[Prior Art] FIG. 5 shows a conventional high-pressure slide gate installed in the middle part of a discharge pipe a in a dam discharge facility.
As shown in the figure, the rectangular door body d can also move up and down in the bonnet b so that the rectangular distribution pipe c formed in the lower portion of the bonnet b can be opened and closed. Since the discharge pipe a is a circular pipe line, a deformed pipe e is generally arranged between the discharge pipe a and the flow pipe c. In addition, f is a spindle for opening and closing the door, and g is an air pipe.

However, the irregular pipe e is uneconomical because it restricts the installation space for the main discharge gate, flow meter, etc., and the manufacturing and installation work is troublesome.

Therefore, in recent years, as shown in FIG. 7 and FIG.
A high-pressure slide gate has been devised in which the cylinder is made cylindrical so that the deformed tube e can be eliminated.

[Problems to be Solved by the Invention] However, even when such a method is adopted, since the door body d is rectangular, a deep groove is formed in the corner portion h of the bottom door contact surface, and this groove is exposed to running water. The contained soil, dirt, and the like were likely to collect, and there was a risk that the door body d could not be completely closed.

The present invention has been made in view of such circumstances.

[Means for Solving the Problems] According to the present invention, a door body for accommodating a door body 5 for opening and closing the flow pipe 1 in a bonnet 2 having a cylindrical flow pipe 1 at a lower portion thereof is vertically movable. The width forming surface 6 on the downstream side that forms the working space 3 and is connected to the flow pipe 1 of the door body working space 3 at a right angle.
, A strip-shaped pressure plate 10 that extends in the vertical direction with an equal width and is in sliding contact with the side watertight fitting 14 attached to the back surface of the door body 5, and the bottom portion of the door body 5 is attached to the bottom portion of the door body operating space 3. In a high-pressure slide gate having a bottom door contact surface 9 in contact with the bottom door contact surface 9, the bottom door contact surface 9 extends tangentially to the inner surface of the flow pipe 1, and a central horizontal surface portion 9a and both ends of the horizontal surface portion 9a. And an inclined surface portion 9b that rises obliquely upward at an angle θ ₂ of 30 degrees, the bottom portion of the door body 5 has a shape corresponding to the bottom door contact surface 9, and the bottom portion of the door body 5 is located downstream. It has a sharp edge shape that inclines downward as it goes to the side, and further has an inclined surface 18 formed on the bottom peripheral edge step portion 17 between the bottom door contact surface 9 and the flow pipe 1.

[Operation] Since the bottom door contact surface is formed into a bent shape along the inner surface shape of the flow pipe, a deep groove is not formed between the flow pipe and the door contact bottom surface. The door can be completely closed without accumulating on the bottom surface.

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

As shown in FIGS. 1 to 3, in a bonnet 2 having a cylindrical flow pipe 1 at the bottom, a door working space 3 extending upward from the flow pipe 1 so as to be orthogonal to the flow pipe 1 is provided. The door body 5 is formed so that the door body 5 can be moved up and down through the drive spindle 4 in the door body operating space 3.

The door body operating space 3 includes a width forming surface 6 on the downstream side and a width forming surface 7 on the upstream side, both ends of which are side door contact surfaces, thickness forming surfaces 8 and 8 of both width ends, and a watertight plate. Is composed of a bottom door contact surface 9 and a water-tight bearing plate 10, 10 on the downstream side door contact surface, and a similar guide plate on the upstream side door contact surface. 11, 11 are respectively installed in the vertical direction, and a pressure plate is provided at a position above the flow passage 1 on the width forming surface 6 on the downstream side.
A bearing plate 12 is attached so as to connect 10 and 10, and a bottom door contact surface 9 has a bent shape tangentially along the inner surface shape of the flow pipe 1. In the figure, 19 is an air pipe.

The bent shape of the bottom door contact surface 9 is, for example, 15 ° to the left and right with respect to the vertical axis of the door body 5 from the center of the flow pipe 1 to a total of 30 °
The range (indicated by θ ₁ in FIG. 2) is the horizontal plane portion 9a, and the range from both ends of the horizontal plane portion 9a to the thickness forming surfaces 8 and 8 is 30 ° upward (indicated by θ ₂ in FIG. ₂ ). The inclined surface portions 9b and 9b are respectively inclined.

On the other hand, the door body 5 has a bottom shape corresponding to the bottom door contact surface 9, and has an upper watertight fitting 13, side watertight fittings 14 and 14, and a lower watertight fitting 15 at the peripheral edge of the downstream surface. Each of them has a guide 16 on its upstream side, at a vertical position facing the guide plates 11, 11.

Further, as shown in FIG. 4, the horizontal plane portion 9a of the bottom door contact surface 9
The required inclined surfaces 18 are provided at the lower end step portions of the width forming surfaces 6 and 7 formed by the angle of the boundary between the inclined surface portion 9b and the inclined surface portion 9b, that is, the peripheral step portion 17 at the bottom of the flow pipe 1.

As described above, the high-pressure slide gate of the present invention can be used by attaching it to the middle portion of the discharge pipe, which is a circular pipe line, without using a deformed pipe because the flow pipe 1 has a cylindrical shape.

In the above, when the door body 5 is lowered to the lowermost position by operating the drive spindle 4, the upper watertight fitting 13 and the side watertight fittings 14 and 14 become the pressure bearing plate 10 as shown in FIG. ,
Further, the bottom watertight fittings 15 are further brought into close contact with the bottom door contact surfaces 9 to shut off the flow pipe 1.

On the other hand, the door body 5 is raised to move the flow pipe 1 as shown in FIG.
When opened, running water from the upstream discharge pipe side flows through the flow pipe 1 to the downstream side. At this time, the bottom door contact surface 9 is the distribution pipe 1
Since the groove is not formed between the bottom door contact surface 9 and the flow pipe 1, it has a bent shape that tangentially follows the inner surface shape of the water. It does not flow along with it and collect on the bottom door contact surface 9. Further, in the present invention, since the inclined surface 18 is provided on the bottom peripheral edge step portion 17 of the flow pipe 1 which is formed by the horizontal surface portion 9a of the door contact surface 9 and the inclined surface portions 9b, 9b at the bottom portion, the earth and sand etc. It smoothly and reliably flows to the downstream side due to the force of the flow.

Therefore, as shown in FIG. 1, when the door body 5 is lowered to the lowermost position, there is no earth and sand between the lower watertight fitting 15 and the bottom door contact surface 9, and a completely closed state. Is obtained.

Since both the bent shape of the bottom door contact surface 9 and the corresponding bottom shape of the door body 5 are a combination of planes, sufficient precision can be obtained rather than specially difficult machining.

[Effects of the Invention] As described above, according to the high pressure slide gate of the present invention, the following excellent effects can be obtained.

1. It can be installed and used in a circular conduit without using a modified pipe.

2. Since the angle θ ₂ of the inclined surface portion 9b that rises obliquely upward from both ends of the horizontal surface portion 9a in the bottom door contact surface 9 is set to 30 degrees which is slightly larger than the repose angle of earth and sand or dust, the angle θ
_{When 2 is set} to 30 degrees or less, it is possible to eliminate the retention of earth and sand or dust that occurs on the inclined surface portion 9b, and when the angle θ _{2 is set} to 30 degrees or more, the pressure plate 10 or Guide plate
In 11, it is possible to prevent the area of the trapezoidal portion that is not supported from becoming too large and being bent by the high-pressure water, which may cause vibration or hinder the opening and closing.

3. The bottom of the door body 5 has a sharp edge shape that inclines downward as it goes downstream, so that the flowing water is guided downward and rectified at the sharp edge portion. It is possible to reduce the force and prevent the door body 5 from vibrating.

4. Since the inclined surface 18 is formed on the step portion 17 on the bottom peripheral wall between the bottom door contact surface 9 and the flow pipe 1, the water flow flowing along the inclined surface 18 prevents the accumulation of earth and sand or dust on the bottom peripheral step portion 17. Can be prevented.

5. As a result of the above, it is possible to reliably prevent the accumulation of dirt and dust,
It is possible to secure high deadline accuracy.

[Brief description of drawings]

1 is a cut-away side view of the high-pressure slide gate of the present invention (closed state), FIG. 2 is a view taken along the line II-II of FIG. 1 (fully open state), and FIG. 3 is a cut-away plan view of FIG. , The upper half is a view on the arrow IIIA, the lower half is a view on the arrow IIIB, FIG. 4 is an enlarged view on the line IV-IV in FIG. 2, FIG. 5 is an explanatory view of a conventional high pressure slide gate, and FIG. VI-VI arrow view of FIG. 5, FIG. 7 is an explanatory view showing a recent example, and FIG. 8 is a VIII-VIII arrow view of FIG. 1 is a flow pipe, 2 is a bonnet, 3 is a door operating space, 5 is a door, and 9 is a bottom door contact surface.

Front page continued (72) Inventor Yukihiko Ueda 1-19-10 Mori, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Koto Office (72) Inventor Katsumi Izuhara 118 Futatsuka, Noda, Chiba Kawasaki Heavy Industries Ltd. Noda Factory (72) Inventor Toshiharu Nakata 1-6-14 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Inventor Yuzo Mitani 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Mitsubishi Heavy Industries, Ltd. Yokohama Works ( 56) References: 62-73168 (JP, U): 62-148624 (JP, U): 59-92727 (JP, U): 59-30043 (JP, Y2)

Claims (1)

[Claims] 1. A door body operation for accommodating a door body (5) for opening and closing the flow pipe (1) in a bonnet (2) having a cylindrical flow pipe (1) at a lower part thereof so as to be able to move up and down. A door body is formed by forming a space (3) and extending at an equal width in the vertical direction on a downstream side width forming surface (6) connected to the flow pipe (1) of the door body operating space (3) at a right angle. Attach a strip-shaped pressure support plate (10) that is in sliding contact with the side watertight fitting (14) attached to the back of (5),
In a high pressure slide gate having a bottom door contact surface (9) in contact with the bottom of the door body (5) at the bottom of the door body operating space (3), the bottom door contact surface (9) is connected to the flow pipe (1). A central horizontal plane (9a) extending in the tangential direction to the inner surface and an angle θ _{2 of} 30 degrees from both ends of the horizontal plane (9a).
And a bottom surface of the door body (5) having a shape corresponding to the bottom door contact surface (9), and a bottom portion of the door body (5), It has a sharp edge shape that inclines downward as it goes downstream, and further that an inclined surface (18) is formed at the bottom peripheral step (17) between the bottom door contact surface (9) and the flow pipe (1). Characteristic high-pressure slide gate.