JP3200600B2 - High pressure slide gate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pressure slide gate installed at a downstream end of a discharge line of a dam.

[0002]

2. Description of the Related Art A high-pressure slide gate used at the downstream end of a discharge pipe of a dam is, as shown in an example in FIG. 3, a bonnet 2 having a discharge passage 1 and a horizontal flow passage 2a formed at the lower portion thereof. A switchgear 3 installed on the hood 2 inside
The gate door body 4 is housed so as to be slidable in the vertical direction by the operation of.
The sub-gate 6 is interposed at the downstream end of the discharge pipe 1 so that the sub-gate 6 is located close to the upstream side of the main gate 5. 7 is a switchgear room, 8 is a supply / exhaust valve,
Reference numeral 9 denotes an air pipe installed at the outlet of the main gate 5.

As described above, in the high-pressure slide gate installed in the discharge pipe 1 as the main gate 5 and the sub gate 6, the gate door 4 of the main gate 5 is slid to open and close the flow path 2a. The flow rate of the discharged water passing through the discharge line 1 is adjusted, and the
Is used.

[0004]

However, in the case of the above-mentioned high-pressure slide gate, if the main gate 5 and the sub-gate 6 are used in a parallel arrangement, the distance l between the gate doors 4 is limited due to its configuration. Accordingly, there is a problem that the distance L in the direction of the pipe line 1 of the cavity space provided as the switchgear room 7 in the embankment or in the ground becomes large.
At the time of maintenance and inspection, the gate door 4 of the sub-gate 6 is closed. However, there is a case where the inside of the bonnet 2 has only a narrow space where an operator cannot enter. There is a problem that hinders the operation. Further, even if the gate door 4 of the sub-gate 6 is closed, the bonnet 2 of the sub-gate 6 is usually filled with water. Maintenance work inside was impossible.

Therefore, the present invention reduces the distance between the gate doors so that the cavity space provided as a switchgear room in the embankment or in the ground can be reduced in size, and the door and the hood can be easily installed. It is an object of the present invention to provide a high-pressure slide gate which can be maintained and inspected.

[0006]

According to the present invention, in order to solve the above-mentioned problems, two gate doors arranged in parallel in a bonnet having a discharge pipe and a flow path corresponding to a flow path formed in a lower part are provided. The gate doors are housed so as to be slidable in the direction of opening and closing the road, and the gate doors are arranged such that the water stop surfaces of the gate doors face each other outward.

[0007]

[Function] Since the two gate doors are housed in one hood, the distance between the two gate doors can be set small, thereby reducing the cavity space provided as a switchgear room. become able to. Further, since each gate door body is arranged with the water stop surface facing outward, when the gate door body located on the upstream side of the discharge pipe is closed, it is possible to prevent water from entering the hood, This makes it possible for the worker to enter and exit the hood.

[0008]

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

FIGS. 1 and 2 show an embodiment of the present invention. Two gate doors are provided in a bonnet 10 having a horizontal flow passage 10a corresponding to the discharge pipe 1 formed in the lower portion. The main gate door body 11 and the sub gate door body 12 are slidably arranged in a vertically slidable manner and stored.
The main gate door 11 and the sub gate door 12 are slid on the bonnet 10 to open and close the flow passage 10a. The main gate door 11 and the sub gate door are respectively provided. 12 are arranged such that the skin plates 11a and 12a serving as water-stop surfaces face in opposite directions, respectively, and a water-stop rubber 13 is attached to the bonnet 10 corresponding to the skin plates 11a and 12a. At the upper end, a manhole 14 for entering and exiting the hood 10 is provided, and two gate doors 11 and 1 are provided.
2 is a high-pressure slide gate using an integrated bonnet 10 corresponding to FIG. In FIG. 1, the same reference numerals as those in FIG. 3 indicate the same parts.

As shown in FIGS. 1 and 2, the high-pressure slide gate having the above-described structure is arranged such that the sub-gate door body 12 is located at the downstream end of the discharge pipe 1 and upstream of the main gate door body 11. In this case, the distance of the switchgear room 7 in the pipe direction can be reduced as compared with the conventional type shown in FIG. That is, in the model shown in FIG. 3, since each gate door 4 is housed in a separate bonnet 2, the distance l between the gate doors 4 is limited by the dimension of the bonnet 2. In the present invention, however, the main gate door 11 and the sub gate door 12 are housed side by side in the integrated bonnet 10, so that
The distance l 'between the sub gate doors 11 and 12 is determined by the distance l
It can be set smaller. Accordingly, the installation interval of the switchgear 3 also becomes narrower in accordance with the distance l 'between the gate doors 11 and 12, and thus the distance L' of the switchgear room 7 in the pipe direction.
Can be made smaller than L shown in FIG. 3, whereby the size of the switchgear room 7 as a cavity space provided in the embankment or the ground can be reduced.

When performing maintenance work, the sub-gate door body 12 is closed to shut off the water flow. At this time, the main gate door body 11 and the sub-gate door body 12 are provided with their respective skin plates. Since 11a and 12a face outward,
The inflow of the discharge water in the discharge pipe 1 can be blocked by the skin plate 12 a of the sub-gate door body 12. Therefore, since the worker can enter the hood 10 using the manhole 14, it is possible to easily perform maintenance and inspection on all parts other than the skin plate 12 a of the sub-gate door body 12. it can.

In the above description, the flow rate of the discharged water can be adjusted by opening and closing the main gate door 11 with the sub-gate door 12 fully opened, and in the present invention, the main gate door is further provided. The flow rate of the discharged water can also be adjusted by adjusting the opening and closing of the sub-gate door body 12 with the fully opened state 11. That is, in FIG. 1, the main gate door 1
1 is larger than the sub-gate door body 12 and the outlet flow path of the main gate door body 11 of the bonnet 10 is
2 is larger than the inlet flow path, and the diameter of the discharge pipe 1 communicating with the outlet flow path is made larger corresponding to the outlet flow path. Even if the sub-gate door body 12 is fully opened with the gate door body 11 fully opened, the water vein 15 is prevented from hitting the main gate door body 11 and the guide portion of the air pipe 9 as shown by the two-dot chain line in FIG. can do. Therefore,
When the main gate door 11 is out of order, the sub-gate door 12 may be used for adjusting the flow rate, or the main gate door 11 may be used.
And the sub-gate door body 12 can be used alternately for flow rate adjustment.

The present invention is not limited to only the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0014]

As described above, according to the high-pressure slide gate of the present invention, the distance between the two gate doors is set small because the two gate doors are housed side by side in the integrated bonnet. As a result, the cavity space provided as a switchgear room for the gate door body in the embankment or the ground can be reduced in size, and each gate door body is arranged so that the water stop surface of each gate faces outward. By completely closing the gate door on the upstream side, the ingress of water into the bonnet can be blocked, allowing workers to enter and exit the bonnet, making maintenance and inspection work easier. In particular, it has excellent effects such as maintenance and inspection of the gate door on the upstream side.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing an outline of an embodiment of a high-pressure slide gate according to the present invention.

FIG. 2 is a cut-away plan view of FIG.

FIG. 3 is a schematic view showing an example of a conventional high-pressure slide gate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge pipe line 10 Bonnet 10a Flow path 11 Main gate door (gate door) 11a Skin plate (water stop surface) 12 Sub gate door (gate door) 12a Skin plate (water stop surface)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 57-174536 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02B 8/04 E02B 7/20-7 / 20 101 E02B 8/02

Claims (1)

(57) [Claims] 1. A bonnet in which a flow path corresponding to a discharge pipe is formed at a lower portion, two gate doors arranged side by side are slidably housed in a direction for opening and closing the flow path, and each of the gates is provided. A high-pressure slide gate having a configuration in which doors are arranged such that water blocking surfaces of the respective gate doors face outward in opposite directions.