JPS6011150Y2 - Cylinder gate safety device - Google Patents

Description

[Detailed description of the invention] This invention relates to a safety device for a cylinder gate that takes in surface water from a reservoir.

In such a cylinder gate, as the depth of water used becomes deeper and the amount of water taken in increases, it is necessary to increase the wall thickness of the cylindrical body constituting the cylinder gate sufficiently.

For this reason, the thickness of the plate that makes up the cylinder can reach up to 3-3cm, and when it becomes this thick, the weight of the cylinder gate becomes extremely large, so the capacity of the hoist must be increased. Also, problems arise in transportation and on-site construction.

This invention aims to solve the problems of the conventional cylinder gate for high water depths as described above.

In other words, this idea provides an emergency opening in the bottom cylinder, and a lid that opens when the difference in water pressure between the inside and outside of the cylinder gate exceeds a certain level. By opening the lid and opening the emergency opening before the water pressure applied to the outside of the cylinder rises to a dangerous height, the difference between the water pressure inside the cylinder gate and the external water pressure is reduced, so that the cylinder is protected from water pressure. To provide a cylinder gate safety device that prevents damage.

The details of this invention will be explained below based on the embodiments shown in the attached drawings.

In FIG. 1, A is a cylinder gate in which a plurality of cylindrical bodies 1 of different sizes and diameters are slidably fitted together, and a gasket is attached to this fitting part to prevent water leakage.

B is the water intake tower, which was installed on the upstream side of dam 2, and consists of multiple pillars and a bar screen installed between the pillars.
It surrounds the cylinder gate A.

In addition, there is an operation room 3 on the water intake tower B, and a rope 4 hanging from a hoist installed in the operation room 3 suspends a float-type rectifying plate 5. body 1
is suspended, and the spout at the upper end of the cylinder 1 is held at an appropriate position below the water surface of the reservoir 6.

Reference numeral 7 denotes a plurality of openings provided near the lower end of the lowermost cylindrical body 1.

Inside the cylinder 1, there is a horizontal partition plate 8 as shown in FIG. At the lower part of the mouth 10, a gasket 13 is provided which is in close contact with the outer side of the upper end of the water inlet 12 which communicates with the water conduit 11 passing through the lower part of the dam 2.

14 is a lid that opens and closes each opening 9, and a shaft 15 connects the partition plate 8.
It is swingably mounted on the

As shown in Fig. 3, this lid 14 can be rotated upwardly, but cannot be rotated downwardly, and the gaskets 16 and 17 provided around the opening 9 are attached to the periphery of the lid 14 in the closed position. By coming into close contact with each other, the opening 9 is completely closed.

Further, the lid 14 closes the opening 9 by its own weight or the force of a spring.

In the case of the above embodiment, when the water level difference between the inside and outside of the cylinder body 1 is within a preset range, the winter jacket 14 closes each opening 9 as shown in FIG. 3.

Therefore, the surface water of the reservoir 6 flows in from the spout at the upper end of the uppermost cylinder 1, flows down inside the cylinder gate A, and flows through the drain port 10.
, and is led to the water conduit 11 via the water inlet 12.

At this time, water pressure near the bottom of the reservoir 6 is applied to the lower surface of the lid 14, but the opening 9 is completely closed due to the weight of the lid 14 or the force of the spring.

Now, when the water level inside the cylinder 1 falls abnormally and the water pressure applied to the lower surface of the lid 14 exceeds a set value, the lid 14 is lifted and the water that has flowed in from the opening lower flows into the cylinder 1 through the opening 9. Since the water pressure difference between the inside and outside of the cylinder 1 becomes small, the cylinder 1 is protected.

. FIGS. 4 and 5 show another embodiment, in which a receiving plate 1 is located in the lowermost cylinder 1 and directly above each opening lower.
8 is provided all around the circumference.

Reference numeral 19 denotes a lid which is fitted on the receiving plate 18 into the cylindrical body 1 so that it can be raised and lowered, and a downward cylindrical part 20 is integrally formed in the center of the lid, and the inside thereof is used as a drain port 21.

Further, a gasket 22 is attached to the lower edge of the cylindrical portion 20, so that when the lid 19 is lowered, the gasket 22 comes into close contact with the receiving surface 29 on the outer circumference of the upper end of the water inlet 12, and connects the drain port 21 and the water inlet 12.
Buffer rubber 23 is provided on the upper surface of the receiving plate 18 so as to contact several places on the lower outer circumference of the lowered lid 19.

Furthermore, a gasket 25 covering the entire circumference is attached to the upper outer periphery of the upward edge 24 formed on the outer periphery of the lid 19.
5 in slidable contact with the inner surface of the cylindrical body 1, and a plurality of rollers 26 are provided outside the upward edge 24 to contact the inner surface of the cylindrical body 1, and a plurality of rollers 26 fixed to the lower side of the lid 19 are provided. rib 27
A roller 30 that moves up and down along a plurality of vertical guide rails 28 fixed to the inner lower side of the receiving plate 18 is attached to the roller 30 .

In the case of the above embodiment, when the water level of the reservoir is at a normal height, the water pressure applied to the lower surface of the lid 19 through the open lower is lower than the own weight of the lid 19, so M19 is moved to the lowered position by its own weight as shown in FIG. It is in.

Therefore, water intake is performed from the spout at the upper end of the cylinder gate A.

Now, when the water level inside the cylinder 1 drops abnormally and the water pressure pushing up the lid 19 exceeds the limit, the lid 19 will be pushed up and the gasket 22 at the lower end of the cylindrical part 20 will separate from the receiving surface 29. High-pressure water at the bottom of the reservoir flowing in from the open lower flows into the cylinder 1, reducing the difference in water pressure between the inside and outside of the cylinder 1, so that the cylinder 1 is protected.

As mentioned above, this idea provides an opening in the bottom cylinder of the cylinder gate, and a lid that closes this opening using its own weight or a spring. When the water pressure becomes abnormally high, this water pressure opens the lid and high-pressure water flows into the cylinder, reducing the difference in water pressure inside and outside the cylinder, so it is a very deep cylinder gate. Even in this case, the wall thickness of the cylinder can be made relatively thin.

Therefore, the cylinder gate is relatively lightweight even in deep reservoirs, and the structure is simple, so there is less risk of failure.

[Brief explanation of drawings]

Figure 1 is a side view of the cylinder gate that implemented this idea.
．． Fig. 2 is an enlarged cross-sectional plan view taken along line I-I in Fig. 1, Fig. 3 is an enlarged longitudinal sectional front view taken along line ■-■ in Fig. 2, and Fig. 4 is an enlarged longitudinal sectional view taken along line I-I in Fig. 1 of another embodiment. An enlarged cross-sectional plan view of Figure 5 is Figure 4 ■
It is an enlarged longitudinal sectional front view taken along the line -■. 1... Cylindrical body, 6... Reservoir, 7, 9.
...Opening, 14.19...Lid, A...
...Cylinder gate.

Claims (1)

[Scope of utility model registration request] A plurality of cylinders with different sizes and diameters are slidably fitted together to make them expandable and retractable.A water intake port is provided at the upper end of the top cylinder, and this water intake port is held at a predetermined position under the water surface. In the cylinder gate, the lower end opening of the cylinder communicates with the water conduit that guides water to the desired part, and an emergency opening is provided in the cylinder at the bottom of the cylinder gate. A cylinder gate safety device with a lid that opens when the temperature reaches a certain level.