JPS6233770Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a watertight device for a sand discharge gate that opens and closes an opening at the upstream end of a sand discharge pipe installed in a dam in order to discharge the sediment accumulated in the reservoir to the downstream side of the dam. It is related to.

In conventional gates of this type, the gate body is lowered from above, the opening of the sand discharge pipe is closed, and the lower end of the gate body is received by the lower gate body receiving portion to perform closing.

In the case of the above type, there is a problem in that dirt remains on the door body holder, making it impossible to close the door.

As a gate that solves the above-mentioned problems, there is a two-stage gate described in Japanese Utility Model Publication No. 49-3156.

Although this two-stage gate is not for a sand discharge pipe, it is constructed so that its lower door sinks into a storage chamber formed in the riverbed, and its upper end surface becomes part of the riverbed.

However, the invention described in this publication does not describe at all the seal structure for preventing the inflow of earth and sand from the gap between the lower door and the storage chamber.
There is also no mention of maintaining watertightness when the opening used for the sand discharge pipe is closed.

The purpose of this invention is to prevent dirt from flowing into the storage chamber and to provide complete watertightness when the gate is closed, in a type of gate that lowers the door body into the storage chamber when opened, similar to the known gates mentioned above. That is.

That is, in this invention, a horizontal intermediate rubber is attached to the upper part of the upstream side of the storage chamber, and the horizontal intermediate rubber is slidably attached to the upstream side of the door. Vertical upstream vertical rubbers that are slidably in close contact with the upstream side of the storage chamber and both ends of the intermediate rubber are respectively fixed, and the upper and lower parts of the upstream side of the door body are provided with the downstream side of the storage chamber. In addition to attaching horizontal upper and lower rubbers that slidably adhere to the side surfaces, they also slidably adhere to both sides of the downstream side of the storage room on both sides of the downstream side of the door body. and provided with left and right downstream vertical rubbers connected to both ends of the upper rubber and the lower rubber, so that the upper, lower, left and right rubbers surround the opening of the sand discharge pipe when the door body is raised; On the outer periphery of the rubber mounting plates provided on both sides of the upper end of the door body, U-shaped rubber is attached to the inner surfaces of the left and right guide grooves that extend upward from both sides of the storage chamber so that they can slide freely, and fresh water is supplied into the storage chamber. It is equipped with a fresh water supply pipe.

Since the watertight device for the sand discharge gate of this invention has the above-mentioned configuration, when the door body is lowered and stored in the storage chamber at the bottom, the horizontal intermediate rubber provided at the top of the upstream side of the storage chamber The vertical rubbers on the left and right upstream sides of the upstream side of the door body are in close contact with the upstream side of the storage chamber, and the upper and lower parts of the downstream side of the door body are in close contact with the upstream side of the door body. The upper rubber, the lower rubber, and the vertical rubber on the downstream side provided on both sides are in close contact with the downstream side of the storage chamber, and the U-shaped rubber provided on the outer periphery of the mounting plate on both sides of the upper end of the door body is Since it is slidably in close contact with the upstream and downstream surfaces and the surfaces of both ends of the guide groove that continues upward near both ends, there is no risk of dirt entering the storage chamber.

In addition, when the door body is raised and the opening of the sand discharge pipe is closed, the above-mentioned upper rubber and lower rubber provided on the downstream side of the door body, as well as the left and right vertical rubbers on the downstream side, are attached to the surface around the opening. Watertightness is maintained by close contact.

In addition, even when the door body closes the above opening, the above-mentioned rubbers prevent dirt from flowing into the storage chamber, so there is no flow of dirt into the storage chamber, and the door body can always be raised and lowered smoothly. The sand discharge pipe can be opened and closed completely. Furthermore, by supplying fresh water to the storage chamber from the fresh water supply pipe, the pressure of the muddy water above the watertight part at the top of the storage chamber and the clean water inside the storage chamber is balanced, making it difficult for the muddy water at the top to enter the storage chamber, and This has the effect of preventing negative pressure in the storage chamber when the door body is pulled upward, and preventing muddy water from flowing into the storage chamber.

Next, one embodiment of this invention will be described based on the drawings.

1 is the dam, the left side of Figure 2 is the reservoir, and 2
is a sand discharge pipe, and 3 is its opening.

4 is a storage chamber provided below the opening 3, and the door body 5 is stored within this storage chamber 4.

Large-diameter main rollers 6 are rotatably attached to the intermediate portions of the left and right end surfaces of the door body 5 near the upper and lower downstream sides, respectively, and are brought into contact with both ends of the downstream surface of the storage chamber 4 as shown in FIG. .

Support frames 8 are fixed to the left and right upper and lower downstream sides of the door body 5, and side rollers 9 that contact both left and right end surfaces of the storage chamber 4 are attached to each frame 8.

Furthermore, a front roller 11 that contacts the left and right upstream surfaces of the storage chamber 4 is attached to a bracket 10 fixed to the left and right upper and lower downstream sides of the door body 5.

Reference numeral 12 denotes a horizontal protrusion fixed to the upper part of the upstream side of the storage chamber 4. A horizontal intermediate rubber 13 is placed on the upper side of this protrusion 12, and the rear part of the rubber 13 is held down by a press plate to fix it. However, this rubber 13 is in contact with the upstream side surface of the door body 5.

Vertical protrusions 1 are provided on the left and right sides of the upstream side of the door body 5.
5 are fixed respectively, a vertical rubber 16 on the upstream side is applied to both protrusions 15, and the rear part of this rubber 16 is pressed by a press plate to fix it, but this rubber 16 is in contact with the wall surface on the upstream side of the storage chamber 4. Moreover, the side surfaces of the rubber 16 also come into contact with both end surfaces of the intermediate rubber 13.

A square frame-shaped rubber mounting base 17 is fixed to the upper and lower parts and both sides of the downstream surface of the door body 5, and a horizontal upper rubber 18 and a lower rubber 19 are mounted on the mounting base 17.
Then, the left and right downstream side vertical rubbers 20 are applied and fixed by pressing with square frame-shaped press plates.

The above-mentioned upper rubber 18, lower rubber 19, and left and right vertical rubbers are in the shape of a continuous square frame, and are in contact with the downstream surface of the storage chamber 4, and around the opening 3 when the door body 5 is in the fully closed position. It is designed to be in close contact with the surface.

Reference numeral 22 denotes a rubber mounting plate provided obliquely upward on both ends of the door body 5, and a rubber 23 having a U-shaped planar shape is placed on the periphery of the mounting plate 22, and is held and fixed by a U-shaped holding plate.

The rubber 23 is slidably in close contact with the left and right upstream and downstream wall surfaces and end surfaces of the storage chamber 4. However, as shown in Figure 1, the upper rubber 1 on the downstream side
Since there will be a gap between the tops of both ends of 8 and the rubber 23, extend the left and right vertical rubbers 20 upward and install the rubber mounting plate 22.
Closely attach it to the bottom surface of the The upper end of the vertical rubber 16 on the upstream side is in close contact with the lower surface of the rubber mounting base 17 as shown in FIG.

Reference numeral 25 denotes a guide groove continuously formed above both ends of the storage chamber 4, which is connected to both ends of the vertical rubber 16, 20, upper rubber 18, lower rubber 19, and the U-shaped rubber 2.
3 is slidably in close contact with the inner surface of the guide groove 25.

26 is a pair of left and right wire ropes whose lower ends are fixed to both ends of the upper surface of the door body 5, and these ropes 26 are connected to the dam 2.
The door body 5 is raised and lowered by operating a hoisting machine provided in an upper operation room.

A drain pipe 27 is provided at the bottom of the storage chamber 4, and a fresh water supply pipe 28 is provided at the lower end of the side of the storage chamber 4.

In the above embodiment, FIGS. 1 and 2 show a state in which the door body 5 is lowered into the storage chamber 4 and the opening 3 is fully opened.

In this state, the gap between the door body 5 and the storage chamber 4 is the middle rubber 13, the upper rubber 18 and the vertical rubber 16, 2.
Since the upper part of the storage chamber 4 is closed by the U-shaped rubber 23, earth and sand cannot enter into the storage chamber 4.

Next, when the wire rope 26 is wound up to lift the door body 5, the main roller 6, side rollers 9, and front roller 11 of the door body 5 rise along the left and right sides of the storage chamber 4 and the guide groove 25 that follows. The upper rubber 18, the lower rubber 19, and the vertical rubber 20 on the downstream side are fully closed at a position surrounding the opening 3, and the winding of the rope 26 is stopped.

In this state, the gap between the door body 5 and the end face of the opening 3 is completely closed by the rubbers 18, 19, 20.

Also, at this time, the middle rubber 13 and the lower rubber 1
9 and the U-shaped rubber 23 close the gap between the storage chamber 4 and the door body 5, making it possible to prevent earth and sand from flowing into the storage chamber 4.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal cross-sectional view of a sand discharge gate having a watertight device of this invention, with the left half being a front view as seen from the upstream side, and the right half being a rear view as seen from the downstream side. Figure 2 is a vertical side view of the same as above, Figure 3 is Figure 2 A-A
FIG. 4 is a cross-sectional plan view taken along line B--B in FIG. 2, and FIG. 5 is a partially cutaway perspective view of the door body. 2...Sand discharge pipe, 3...Opening, 4...Storage room, 1
3...Intermediate rubber, 16...Upstream vertical rubber, 18
... Upper rubber, 19 ... Lower rubber, 20 ... Downstream vertical rubber, 22 ... Rubber mounting plate, 23 ... U-shaped rubber, 25 ... Guide groove.

Claims (1)

[Scope of utility model registration request] A storage chamber for storing a door body is provided below the opening of the sand discharge pipe, and the opening is closed when the door body rises above the storage chamber, and the opening is opened when the door body is stored in the storage chamber. In the sand gate, a horizontal intermediate rubber is attached to the upper part of the upstream side of the storage chamber, and the horizontal intermediate rubber is attached to the upstream side of the gate body in a slidable manner. vertical upstream vertical rubbers that are slidably in close contact with the upstream surface of the intermediate rubber and both ends of the intermediate rubber are respectively fixed, and the upper and lower parts of the upstream surface of the door body are fixed with In addition to attaching horizontal upper and lower rubbers that are slidably in close contact with the surface, they are also slidably in close contact with both sides of the downstream surface of the storage room on both sides of the downstream surface of the door body. Further, left and right downstream vertical rubbers are provided which are connected to both ends of the upper rubber and the lower rubber, and the upper, lower, left and right rubbers are configured to surround the opening of the sand discharge pipe when the door body is raised. On the outer periphery of the rubber mounting plates provided on both sides of the upper end, U-shaped rubber is attached to the inner surfaces of the left and right guide grooves that extend upward from both sides of the storage chamber so that they can slide freely. A watertight device for the sand discharge gate with a supply pipe.