JPS63107609A - Stabilizer for high-pressure slide gate - Google Patents

Abstract

PURPOSE:To stabilize a gate when opening it to a medium degree by preventing the occurrence of vibration by pressing the gate on the width-forming face side by a method in which a sub-watertight tool touched by the downstream side width-forming face all the time even when the gate is opened at any opening degree is provided. CONSTITUTION:A gate-operating space 3 is formed in a hood 2 having a cylindrical passage tube 1 on its lower part, and a gate 5 to open or close the tube 1 is set in the space 3 in a vertically movable manner. The bottom of the gate 5 and the gate-catch bottom face 9 to be touched by the bottom of the gate 5 are shaped into a bent form connectedly along the inner surface of the tube 1. A sub-watertight tool 17 touched all the time by the downstream side width- forming face 6 to form the space 3 is attached to the upside of the downstream side of the gate 5. The gate 5 can thus be stabilized by preventing the occurrence of vibration during the medium-opening period, and the fatigue of spindle and the abrasion of the side gate-catch part can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a door body stabilizing device for 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 of a discharge pipe a in a dam discharge facility.
As shown in the figure, a rectangular door body d can be moved up and down inside the bonnet b so that the rectangular flow pipe C formed at the bottom of the bonnet b can be opened and closed. Since the discharge pipe a is a circular pipe path, a different-shaped pipe e is generally arranged between the discharge pipe a and the flow pipe C.

Note that f indicates a spindle for driving the opening and closing of the door body, and g indicates an air pipe.

However, the irregularly shaped pipe e restricts the installation space for the main discharge gate, flow meter, etc., is uneconomical, and is also troublesome to manufacture and install.

Therefore, in recent years, as shown in Figs. 7 and 8, flow pipe C
A high-pressure slide gate was devised in which the cylindrical tube was formed to eliminate the need for the irregularly shaped tube e.

However, even if such a method is used, since the door body d is rectangular, a deep groove is formed in the corner of the bottom door stop, and this groove allows dirt, debris, etc. contained in the flowing water to be collected. There was a risk that the door body d would not be able to be completely closed.

Therefore, recently, as shown in FIGS. 9 and 10, the bottom door stop surface i has been bent tangentially (or curved) to follow the shape of the cylindrical flow pipe C, and the door body d
A high-pressure slide gate has also been devised that has a bottom shape that corresponds to this, thereby preventing the formation of deep grooves and preventing accumulation of earth and sand.

[Problems to be Solved by the Invention] However, in such a recently devised high-pressure slide gate, the bottom of the door body d is shaped to protrude downward, so that the The door body vibrates due to the water pressure acting on the protrusion, and the spindle f
There was a risk of causing fatigue, increased local surface pressure and wear of the side door stop, etc.

In view of these circumstances, the present invention is designed to stabilize the door body at intermediate opening degrees.

[Means for Solving the Problems] The present invention provides a method for forming a door operating space in a bonnet with a cylindrical flow pipe at the bottom, and opening and closing the flow pipe within the door operating space. In the high-pressure slide gate, the door body is arranged to be movable up and down, and the bottom part of the m body and the bottom door contact surface that contacts the bottom part of the m body are shaped to follow the inner surface shape of the flow pipe. At the top position of the downstream side,
It has a configuration in which an auxiliary watertight device is attached so as to be in constant contact with the width forming surface on the downstream side that forms the door body operating space.

[Function] Therefore, even if the door body is at an intermediate opening degree, the sub watertight device can maintain a state in contact with the width forming surface, and the center of water pressure acting on the door body approaches the center of the m-body and closes within the working space. Since the pressure is stable, the door body can be pressed against the width forming surface, and photographing is prevented.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a door operating space 3 is provided in a bonnet 2 having a cylindrical flow pipe 1 at its lower part, extending upward from the flow pipe 1 so as to be perpendicular to the flow pipe 1. A door body 5 is disposed within the door body operating space 3 via a drive spindle 4 so as to be movable up and down.

The door body operating space 3 has a width forming surface 6 on the downstream side and a width forming surface 7 on the upstream side, both ends of which are the side door contact surfaces, thickness forming surfaces 8, 8 at both width ends, and a watertight plate. It mainly consists of a bottom door stop surface 9 consisting of a bottom door stop surface 9, a watertight bearing plate 10°10 on the side door stop surface on the downstream side, and a similar guide plate it on the side door stop surface on the father upstream side. 11 are attached in the vertical direction, and a pressure plate 12 is attached to the width forming surface 6 on the downstream side so as to connect the pressure plate 10.10 to the upper position of the flow pipe 1, and furthermore, the bottom door stop surface 9 is It has a bent shape tangentially following the inner surface shape of the flow pipe 1. In addition, 18 in the figure is an air pipe.

The bent shape of the bottom door stop surface 9 is, for example, a total of 3 degrees each at 15 degrees left and right from the center of the flow pipe 1 with respect to the vertical axis of the door body 5.
The range of 0° (indicated by 01 in FIG. 2) is the horizontal surface portion 9a, and the range from both ends of the horizontal surface portion 9a to the thickness forming surfaces 8, 8 is 30° upward (indicated by 02 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 stop 9, and has an upper main watertight fitting 13 on the peripheral edge of the downstream side that contacts the bearing pressure plate 12 in the lowered position (closed position). , side water-tight devices 14, 14 that are in constant contact with the bearing pressure plates io and io, and lower water-tight devices 1 that are in contact with the bottom door stop surface 9 in the lowered position.
5, respectively, and as shown in detail in FIG.
The upper main water sealing device 17 is provided with an upper main watertight device 17 that enters between the gaps and contacts the width forming surface 6 on the downstream side, and on the upstream side, guides 1 are provided at upper and lower positions opposite to the guide plates 11 and 11.
It is equipped with 6.

In the high-pressure slide gate having such a structure, since the flow pipe 1 is cylindrical as described above, it can be installed in the middle of the discharge pipe, which is a circular pipe path, without using a different-shaped pipe.

In the above, when the door body 5 is lowered to the lowest position by operating the drive spindle 4, as shown in FIG. At .10, the bottom watertight devices 15 are brought into close contact with the bottom door stop surfaces 9, respectively, and the flow pipe 1 is blocked.

Meanwhile, the door body 5 is raised and the flow pipe 1 is opened as shown in FIG.
When opened, water from the upstream discharge pipe side flows through the flow pipe 1 to the downstream side. At this time, the bottom door stop surface 9 is the flow pipe 1.
The bending shape is tangential to the inner surface shape of the pipe, and is designed to prevent the formation of deep grooves between the bottom door stop surface 9 and the flow pipe 1, so that the dirt and debris contained in the flowing water can be removed. It will not flow together with the running water and accumulate on the bottom door stop surface 9.

Furthermore, when the door body 5 is at an intermediate opening degree (approximately half-open degree in the figure) as shown in FIG. 4, the upper main watertight fitting 13 on the downstream side of the door body 5
The contact with the bearing pressure plate 12 is broken, but the upper sub-watertight device 17
maintains a state in which it is in contact with the width forming surface 6 on the downstream side with the head inserted between the bearing pressure plates 10 and 10 (see the upper half of FIG. 3).

The running water passes through the lower part of the door 5, but a portion of the running water passes through the upstream surface of the door 5 and enters the door operating space 3. Here, as mentioned above, since the upper sub-watertight device 17 is in contact with the width forming surface 6 and sealed, the door body operating space 3
The internal pressure does not escape and the entire door body 5 is pressed against the width forming surface 6 side, making the door body 5 stable. That is, in the recently devised system as shown in FIGS. 9 and 10, there is no upper sub-watertight device 17, so when the door body 5 is at an intermediate opening degree, there is no water inside the door body operating space 3. The flowing water that has entered can be handled by passing through the downstream surface of the door body 5, and the pressure inside the door body operating space 3 will not be stabilized, causing the door body 5 to become stuck. However, in the present invention, the width By providing the upper sub-watertight device 17 that can maintain contact with the forming surface 6, the door body 5 can be reliably pressed from the upstream surface to the width forming side 16 on the downstream side (in addition,
The side watertight fitting 14.14 has a bearing plate io at any opening degree.
io), the door body 5 can be stabilized.

Therefore, the fatigue of the spindle 4 and the bearing plates io, i.

Furthermore, it is possible to prevent an increase in local surface pressure and wear of the side watertight devices 14, 14.

In the above embodiment, the case is shown in which the application is applied to a high-pressure slide gate in which the bottom door stop surface 9 and the bottom of the door body 5 are bent to follow the inner surface shape of the flow pipe 1. The present invention can also be similarly applied to a high-pressure slide gate in which the bottom of the door body is curved to follow the inner surface shape of the flow pipe.

[Effects of the Invention] As explained above, according to the door body stabilizing device for a high-pressure slide gate of the present invention, no matter what opening degree the m body is, the secondary body is always in contact with the width forming surface on the downstream side. The water-tight device prevents and stabilizes the door body from vibrating at intermediate opening positions, preventing fatigue of the spindle, increased local surface pressure and wear of the side door stop, etc. It can have excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of a high-pressure slide gate equipped with the door body stabilizing device of the present invention (closed state), Fig. 2 is a view taken along arrow n-I in Fig. 1 (fully open state), and Fig. 3 is In the cutaway plan view of Fig. 1, the upper half is a view in the direction of the IA arrow, the lower half is a view in the direction of the I[IB arrow,
Fig. 4 is a cutaway side view showing the operating state, Fig. 5 is an explanatory diagram showing an example of a conventional high-pressure slide gate, Fig. 6 is a view taken along the Vl-VI arrow in Fig. 5, and Fig. 7 is a recent high-pressure slide gate. An explanatory diagram of an example of a slide gate, Fig. 8 is a view from the ■-■ arrow in Fig. 7, Fig. 9 is an explanatory diagram of a recently devised high-pressure slide gate,
FIG. 10 is a view taken along the line X--X in FIG. 9, and FIG. 11 is an explanatory diagram of the main parts of the present invention. 1 is a flow pipe, 2 is a bonnet, 3 is a door operating space, 5 is a door body, 6 and 7 are width forming surfaces, 9 is a bottom door stop surface, and 17 is an upper sub-watertight device. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1) A door operating space is formed in a bonnet having a cylindrical flow pipe at the bottom thereof, and a door for opening and closing the flow pipe is disposed within the door operating space so as to be movable up and down. In a high-pressure slide gate in which the bottom of the door body and the bottom door contact surface that contacts the bottom of the door body are shaped to follow the inner surface shape of the flow pipe, the door body is placed at an upper position of the downstream surface of the door body. A door stabilizing device for a high-pressure slide gate, characterized in that an auxiliary watertight device is attached so as to be in constant contact with a width forming surface on the downstream side that forms an operating space.