JPH07888B2 - High voltage slide gate door stabilizer - Google Patents

Description

Description: [Industrial application] The present invention relates to a device for stabilizing a door body of 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, a rectangular door body d can also move up and down in the bonnet b so as to open and close the rectangular flow pipe c formed in the lower part of the bonnet b. 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 deformed pipe e restricts the installation space for the main discharge gate, the flow meter, etc., is uneconomical, 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 irregular shaped tube e can be dispensed with by forming a cylindrical shape.

However, even if 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 portion, and the dirt and dust contained in the running water is accumulated in this groove. There is a possibility that the door body d cannot be completely closed because it is easy.

Therefore, recently, as shown in FIG. 9 and FIG. 10, the bottom door contact surface i is tangentially bent (or curved) along the shape of the cylindrical flow pipe c, and the door A high-pressure slide gate has been devised in which the body d also has a bottom shape corresponding to this so that a deep groove is not formed to prevent accumulation of earth and sand and the like.

[Problems to be Solved by the Invention] However, in the recently devised high-pressure slide gate, since the bottom portion of the door body d has a shape projecting downward, The water pressure acting on the protrusion vibrates the entire door d, and the spindle f
There is a risk of causing fatigue, increased local surface pressure of the side door contact portion, wear, and the like.

In view of such a situation, the present invention is designed to stabilize the door body at an intermediate opening degree.

[Means for Solving Problems] According to the present invention, a door body working space is formed in a bonnet having a cylindrical flow pipe in a lower portion, and the flow pipe is opened and closed in the door body working space. While arranging the door body so that it can be raised and lowered, on both sides of the door contact surface on the downstream side of the door body operating space,
A pair of left and right bearing plates extending vertically and having opposing end surfaces formed perpendicular to the door contact surface are attached, and the bottom door contact surface that comes into contact with the bottom of the door and the bottom of the door is the flow pipe. In a high-pressure slide gate having a shape that conforms to the inner surface shape of the above, at the upper position of the downstream side surface of the door body, the downstream side that enters between the facing end surfaces of the left and right bearing plates to form the door body working space A sub-watertight tool extending in the lateral direction is attached so as to be constantly in contact with the width forming surface and the end surface of the pressure bearing plate.

[Operation] Therefore, even if the door body is at an intermediate opening degree, the sub-watertight tool can be kept in contact with the width forming surface and the end surface of the pressure support plate, and the center of water pressure acting on the door body is centered on the door body. Since the pressure approaches in and the pressure in the working space is stable, the door body can be pressed against the width forming surface side and vibration can be prevented.

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. And a bottom door contact surface 9 formed on the both side door contact surfaces on the downstream side of the door body operating space 3 that extend in the vertical direction and face each other.
A pair of left and right watertight bearing plates 10a are formed vertically to the door contact surface, and similar guide plates 11 and 11 extend in the vertical direction on the side door contact surface on the upstream side. And the flow pipe 1 on the width forming surface 6 on the downstream side.
A pressure support plate 12 is attached to the upper position of the pressure support plate 10 so as to connect the pressure support plates 10 and 10, and the bottom door contact surface 9 has a bent shape tangentially along the inner surface shape of the flow pipe 1. 18 in the figure
Is an air tube.

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 an upper main watertight fitting 13 that comes into contact with the pressure bearing plate 12 at the lowered position (closed position) is provided on the peripheral portion of the downstream surface. And side watertight fittings 14 and 14 that are constantly in contact with the bearing plates 10 and 10, and lower watertight fittings 15 that are in contact with the bottom door contact surface 9 in the lowered position, respectively.
Further, as shown in detail in FIG. 11, at the upper position of the upper watertight fitting 13, the opposite end faces 10 of the left and right bearing plates 10, 10 are opposed.
An upper sub watertight fitting 17 extending in the lateral direction so as to be constantly in contact with the width forming surface 6 on the downstream side and the end surfaces 10a, 10a of the pressure bearing plates 10, 10 which enter between the a and 10a to form the door body working space 3. Further, on the upstream surface, guides 16 are provided at the upper and lower positions facing the guide plates 11, 11.

In the high-pressure slide gate having such a configuration, since the flow pipe 1 has a cylindrical shape as described above, it can be attached and used in the middle part of the discharge pipe which is a circular pipe line without using a modified pipe.

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 it has a bent shape that tangentially follows the inner surface shape of No. 1 and does not form a deep groove between the bottom door contact surface 9 and the flow pipe 1, dirt, dust, etc. contained in running water It does not flow with running water and collect on the bottom door contact surface 9.

Further, when the door body 5 is at an intermediate opening (approximately half opening in the drawing) as shown in FIG. 4, the contact between the upper main watertight tool 13 and the pressure bearing plate 12 on the downstream side of the door 5 is released. , The upper sub-watertight fitting 17 is inserted between the opposing end surfaces 10a of the left and right pressure support plates 10, 10 to form the door body working space 3 on the downstream side width forming surface 6 and the end faces 10a of the pressure support plates 10, 10. It maintains a state of being constantly in contact with 10a (see the upper half of Fig. 3). Thus, the door body 5
Although the running water passes through the lower part of the door body, a part of the running water passes through the upstream surface of the door body 5 and enters the door body working space 3. Here, as described above, since the upper sub watertight fitting 17 extending in the lateral direction is in contact with the width forming surface 6 and the end surface 10a of the pressure support plate 10 and is sealed, the pressure in the door working space 3 does not escape and the door does not escape. The body 5 is pressed against the width forming surface 6 side as a whole, and the door body 5 is stabilized. That is, in the recently devised method as shown in FIG. 9 and FIG. 10, since the upper sub watertight fitting 17 is not provided, when the door body 5 is at the intermediate opening degree, the inside of the door body working space 3 is The running water that has entered passes through the surface on the downstream side of the door body 5, and the door body operating space 3
Although the internal pressure is not stable and the door body 5 fluctuates, in the present invention, the width forming surface 6 and the end surfaces 10a and 10a, 10
By providing the upper sub watertight tool 17 extending in the lateral direction capable of maintaining the contact state with a, the door body 5 can be reliably pressed to the width forming surface 6 side on the downstream side from the surface on the upstream side ( The side watertight fittings 14 and 14 are supported by the pressure bearing plates 10 and 10 at any opening.
The door body 5 can be stabilized.

Therefore, it is possible to prevent the fatigue of the spindle 4, the pressure bearing plates 10, 10 and the local surface pressure increase and wear of the side watertight tools 14, 14.

In the above-described embodiment, the case where the bottom door contact surface 9 and the bottom of the door body 5 are applied to the high pressure slide gate having a bent shape along the inner surface shape of the flow pipe 1 is shown. Also, the present invention can be similarly applied to a high-pressure slide gate in which the bottom portion of the door body has a curved shape along the inner surface shape of the flow pipe.

[Effects of the Invention] As described above, according to the door body stabilizing device for a high pressure slide gate of the present invention, the width forming surface and the end surface of the pressure bearing plate on the downstream side are always provided regardless of the opening degree of the door body. Since a sub-watertight tool that extends in contact with the lateral direction is provided, vibration of the door body at intermediate opening is prevented and stabilized, spindle fatigue, local surface pressure increase at side door contact part, wear, etc. It is possible to obtain an excellent effect that the above can be prevented.

[Brief description of drawings]

FIG. 1 is a cut-away side view (closed state) of a high-pressure slide gate equipped with a door stabilizing device of the present invention, and FIG.
II-II arrow view (fully opened state), FIG. 3 is a cutaway plan view of FIG. 1, the upper half is the IIIA arrow view, the lower half is the IIIB arrow view, and the fourth.
FIG. 5 is a cut-away side view showing an operating state, FIG. 5 is an explanatory view showing an example of a conventional high pressure slide gate, and FIG. 6 is a VI of FIG.
-VI arrow view, FIG. 7 is an explanatory view of an example of a recent high-pressure slide gate, FIG. 8 is an VIII-VIII arrow view of FIG. 7, and FIG. 9 is a recently devised high-pressure slide gate. FIG. 10, FIG. 10 are views taken along the line XX in FIG. 9, and FIG. 11 is an explanatory view of the essential parts of the present invention. 1 is a flow pipe, 2 is a bonnet, 3 is a door operating space, 5 is a door, 6 and 7 are width forming surfaces, 9 is a bottom door contact surface, 10 is a bearing plate, 10a is an end surface, and 17 is an upper sub watertight. Show the ingredients.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (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. Company 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, Kanagawa In-house (56) References JP 54-45940 (JP, A) JP 57-180709 (JP, A) JP 59-92727 (JP, U) JP 59-30043 (JP, Y2) )

Claims (1)

[Claims] 1. A door body working space is formed in a bonnet having a cylindrical flow pipe at a lower portion, and a door body for opening and closing the flow pipe is arranged in the door body working space so as to be able to move up and down. At the same time, on both sides of the door contact surface on the downstream side of the door working space,
A pair of left and right bearing plates extending vertically and having opposing end surfaces formed perpendicular to the door contact surface are attached, and the bottom door contact surface that comes into contact with the bottom of the door and the bottom of the door is the flow pipe. In a high-pressure slide gate having a shape that conforms to the inner surface shape of the above, at the upper position of the downstream side surface of the door body, the downstream side that enters between the facing end surfaces of the left and right bearing plates to form the door body working space A device for stabilizing a door body of a high-pressure slide gate, wherein a sub-watertight tool extending in a lateral direction is attached so as to be constantly in contact with the width forming surface and the end surface of the pressure bearing plate.