JPS5840108Y2 - Sand removal device for gate groove section - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for removing accumulated earth and sand from gates installed in rivers, waterways, etc., such as roller gates and through skates.

In general, when gates are installed on rivers, waterways, etc., when the gate is closed, sediment does not accumulate in the gutter, but when the gate is raised and opened, not only does it accumulate in the gutter but also on the riverbed. Sediment accumulates.

The sediment that has accumulated on the river bed is washed away by the water current when the gate is lowered to close it, but the sediment that has accumulated in the doorway cannot be removed.

So far, a water injection method or an air diffusion method has been proposed and put into practice, but the current situation is that it takes a considerable amount of time and it is difficult to expect smooth sand removal.

This idea was made in view of the current situation as described above, and its feature is that the lower end opens toward the river or waterway bed below both ends of the gate body located in the gate groove. A sand discharge pipe is installed, the air outlet of the air supply pipe is exposed to the flat end entrance of the sand discharge pipe, and air is injected upward into the sand discharge pipe to create a negative pressure at the sand discharge pipe entrance. The reason is that it is designed to suck out soil and sand.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

In the drawing, 1 is a waterway (or river), 2 is an embankment body, and 3
4 is a waterway bed (or river bed), 4 is a gate groove recessed in both sides of the embankment body 2, 5 is a roller gate, 5A is a gate body, 6 is a roller shaft protruding from both ends of the gate body 5A, 7 is a roller.

8 is a lower watertight rubber of the door body 5A, and 9 is a side watertight rubber, which is attached to both side walls of the embankment body 2 on the upstream side of the door body 5A.

The side watertight rubber 9 is the front skin plate of the door body 5A) 5B
The lid is pressed against the lid by water pressure.

Reference numeral 10 denotes a door stop hardware attached to the downstream side surface 4A of the gate groove 4, with which the roller 7 is brought into contact.

Reference numeral 11 denotes a sand discharge pipe, which is installed below both ends of the door 5A, and its lower end opening, that is, the sand inlet portion 11A, is widened into a trumpet shape and opened toward the channel bed 3.

The sand discharge pipe 11 penetrates the door body side plate 5C from just below the lower roller 7, is guided downstream again from inside the door body 5A in a substantially horizontal manner, and carries the earth and sand to the back of the gate 5 (downstream side). ).

Note that the discharge end 11B of this sand discharge pipe 11 is indicated by 2 in FIG.
As shown by the dotted chain line, it may be positioned above the door body 5A so that the earth and sand can be dropped into the water downstream.

Reference numeral 12 denotes a compressed air supply pipe, whose lower end spout 12A faces upward into the earth and sand inlet 11A of the sand discharge pipe 11, and its upper end 12B passes through the upper end of the door body 5A and is a flexible pipe. 13 are connected.

The other end of the flexible tube 13 is connected to an air compressor or a pressurized air tank (not shown) so that no trouble occurs even when the gate 5 is raised or lowered.

Note that 14 is the hardware for the lower door stop.

Next, a case will be described in which sand is removed from the door groove section using the sand removal device according to this invention.

First, the gate 5 is opened and lowered by operating a hoisting device (not shown).

Game) When the lower end of 5A descends to a predetermined depth in the water (a position above the upper surface of the sediment pile), compressed air is supplied to the air supply pipe 12, and the compressed air is jetted upward from the spout 12A to remove sand. A negative pressure section is formed at the earth and sand inlet section 11A of the pipe 11.

At this time, the gate 5 is lowered at a slow speed or stopped intermittently little by little.

Then, the sediment on the channel bed 3 directly under the gate is washed away by the running water, but on the other hand, the sediment accumulated in the doorway 4 is removed by the sand discharge pipe 11.
It is sucked up together with water into the interior and discharged from the discharge end 11B to the downstream side of the gate 5.

In this way, the earth and sand accumulated in the door groove 4 as the gate 5 descends is smoothly and quickly removed, and the gate 5 can be reliably closed.

The sand removal device for the gate groove section according to this invention has an extremely simple configuration as described above, and can be installed not only on newly installed gates but also on existing gates, and can smoothly and quickly remove earth and sand from the gate groove. Furthermore, it is possible to reliably eliminate the problem, and therefore the gate can be closed reliably and efficiently.

Note that the same effect can be expected by supplying pressurized water instead of compressed air to the air supply pipe.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing an embodiment of this invention, Fig. 2 is a partially omitted top plan view, Fig. 3 is a view along arrow A-A, and Fig. 4 is an enlarged cross-section of section B in Fig. 1. It is a diagram. 1... Channel (or river), 2... Bank body, 3... Channel bed (or river bed), 4...
...Gate groove, 5...Roller gate, 5A
...Door body, 5C...Door body side plate, 11.
... Sand discharge pipe, IIA ... Sediment inlet section, I
IB...Discharge end, 12...Compressed air supply pipe, 12A...Air jet port.

Claims (1)

[Scope of utility model registration request] A sand discharge pipe whose lower end opens toward the river or waterway bed is installed below both ends of the gate body located in the gate groove, and the air outlet of the air supply pipe is located in the lower end entrance of this sand discharge pipe. A sand removal device for a gate groove section, which is characterized by a view of the sand.