JPS6183729A - Method and apparatus for washing water collection hole of water collection culvert - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (1) Purpose of the Invention A water intake device for water supply equipment that uses river water as tap water is a water collection system that has a large number of water collection holes drilled below the groundwater level underground in the bed of a river. A water conduit (usually a cylindrical or rectangular submerged pipe) is buried horizontally, and the water that flows through the water collection hole is pumped up for use.

However, over many years, the water flowing in from the water collection hole causes the fine earth and sand around the water collection hole to settle between the stones around the water collection hole. becomes clogged and eventually becomes unable to take water.

Since the water collection culvert is buried below the groundwater level for water intake, the culvert is filled with water, so it has been impossible to repair this clogging until now. As a result, a new underground water collection culvert had to be buried above the clogged water collection culvert, a major construction project that required a great deal of effort and cost.

This invention involves bringing pressure water and compressed air piping from above ground into a clogged water collection culvert, diving into the prefecture, and directing a mixed flow of pressure water and compressed air through a nozzle to the water collection hole. The present invention relates to a method and apparatus for cleaning a water collection hole in a water collection conduit, which causes water to be ejected to the outside of the water collection hole and eliminates clogging of the water collection hole.

(2) Structure of the invention Next, the content of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an overall view illustrating the method and overall apparatus of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1, and is a detailed view showing the method and apparatus for cleaning water collection holes. Figure 3 is B-B of Figure 2.
FIG.

In the figure, (1) is a buried water collection conduit, and a number of water collection holes (2) are drilled below the groundwater level (6). To restore the clogging of the water collection hole in the water collection underground conduit, pressurized water piping (6a) is connected to the high pressure jet pump (6) that supplies pressure water above ground.
, and its tip connects to the main nozzle (coupling to force (71)
) are connected. In addition, a compressed air pipe (8a) extends from the rotary compressor (8) on the ground, and its tip connects to the main nozzle (compressed air supply pipe (
7b). The main nozzle (7) is provided with a pressure water valve (7c) that adjusts the amount of pressurized water ejected, and the compressed air supply pipe (7b) is provided with a compressed air valve (7d) that adjusts the amount of compressed air ejected. There is. In addition, in this embodiment, the pressure water piping is a flexible pipe, but it bends when pressure is applied (so the main nozzle is bent 90' to make handling easier. A brim-like flange (7f) fitted with (7e) is provided to prevent the jet of pressurized water and compressed air from flowing back into the main nozzle when it is applied to the water collection hole (2). The spout (7g) at the tip of the nozzle has a length that corresponds to the wall thickness of the water collection underground conduit (1).Also, a special nozzle may be attached and detached from the tip of the spout.The above is the structure of the present invention. It is.

Next, in order to perform water collection hole cleaning according to the present invention, a diver must hold the main nozzle and sneak into the water collection culvert, which is full of water, and press the tip of the main nozzle until the gasket on the collar of the main nozzle is pressed against the inner surface of the main nozzle. Pour into the water collection hole (2) and operate both valves to eject a mixed jet of pressurized water and compressed air outward. The mixed jet blows out between the stones, and the compressed air rapidly expands and rises, blowing away the fine sediment and small gravel that had settled between the stones and closing the water collection holes. A considerable area around the area will be cleaned, unclogged and completely restored.

β) Effects of the invention As described above, the method and device of the present invention are simple devices,
The major restoration work that conventionally involved laying a new buried water collection culvert can be done in a short period of time and extremely economically.

Next, Fig. 4a shows another embodiment of the main nozzle, in which (7h) is a tapered tubular nozzle attached to the tip of the nozzle, and a plurality of jet ports (7j) and (7k) are attached to the tip and the side of the tapered tubular nozzle. It has been established. This tapered pipe nozzle (7h) I- is inserted protrudingly between the grilles in front of the skin, and the mixed jet of pressure water and compressed air is ejected over a wider area, further improving the clogging cleaning effect. It increases. Also,
(See Figure 4) If the tapered tubular nozzle (7h) is made of a flexible material, such as synthetic rubber or synthetic resin,
It can be easily inserted into the crevices of grout stone and can clean many water collection holes easily and quickly.

[Brief explanation of drawings]

Fig. 1 is an overall view explaining the method and overall apparatus of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, showing the main nozzle which is the main part of the apparatus, and Fig. 3 FIG. 2 is a plan view taken along line B--B in FIG. 2, and FIGS. 4 and 4 are detailed views showing another embodiment of the main nozzle. (1)...Water collection buried conduit, (2)...Water collection hole, (7)...Main nozzle, (7b)...
・Compressed air supply pipe, (7c)...Pressure water valve, (7d)...Compressed air valve, (7e)...
... Packing, (7f) ... Flange-like flange,
(7g), (7j), (7k)... spout,
(7h)...Tapered tubular nozzle. Procedural amendment (method) Date of February 1985

Claims (4)

[Claims] (1) During restoration work for clogging of water collection holes in water collection underground culverts of water supply water intake facilities, pressure water was infiltrated into the water collection culverts and installed at the ends of pressure water piping and compressed air piping introduced from the ground. 1. A method for cleaning a water collection hole in a water collection culvert, which comprises inserting a nozzle that ejects a mixture of compressed air into the water collection hole, and ejecting the mixed jet from the water collection hole to the outside of the water collection culvert. (2) A brim-like flange with packing attached to the front is installed on the outside of the nozzle, and the pressure water piping from the ground is connected to the rear end.The main nozzle incorporates a pressure water valve, and the compressed air piping from the ground is connected to the rear end. A water collection hole cleaning device for a water collection underground conduit, comprising a compressed air supply pipe incorporating a compressed air valve, the tip of which is connected to the main nozzle. (3) Water collection hole cleaning of a water collection underground conduit according to claim 2, wherein the tip of the main nozzle is formed into a tapered tubular shape, and a plurality of ejection holes are provided at the tip and on the side surface of the tapered tubular nozzle. Device. (4) The water collecting hole cleaning device for a buried water collecting conduit according to claim 3, wherein the tapered tubular nozzle is made of a flexible material.