JPH07233800A - Strainer device provided at suction opening of intake pump - Google Patents

Abstract

PURPOSE:To separate earth and sand in a muddy stream even though the water is taken in from a highly muddy water, by providing nozzles which can spray a high pressure fluid from the inner side to the outer side toward the metal mesh in a strainer. CONSTITUTION:At the part of the suction opening 1a of an intake pump 1, a strainer 4 which consists of a metal mesh to cover the inlet port 1a is installed. This strainer 4 is composed in a cylindrical form, whose upper part is supported rotatable by the upper and the lower support rings 5 provided between a frame 2 and a column 3, and under a river wall respectively, and a gear 6 fixed to the upper side is engaged with a pinion 8 linked and connected to a motor 7 loaded on the frame 2, so as to be rotated to the inlet port 1a. In the strainer 4, a nozzle pipe 9 is provided along the side surface and the bottom surface of the strainer 4, and the nozzles 9a provided to the nozzle pipe 9 are made oppose to the metal mesh of the strainer 4. Consequently, earth and sand in a muddy stream can be separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a strainer of a water intake pump for a water purification plant on the coast of a river. High turbidity water flows into the water purification plant during stormy weather, etc. The purpose is to provide a device that can prevent the sand filter from being destroyed.

[0002]

2. Description of the Related Art Conventionally, a water intake pump or a gate pump in a water purification plant is provided with a dust remover or a strainer at its water intake. JP-A-3-233013 and JP-A-4-1-1
See attached drawing of 03895.

[0003]

However, the above dust remover only removes coarse dust and the like in running water,
Further, since the strainer as shown in FIG. 6 of JP-A-4-103895 is fixed, the reproduction is difficult when it is clogged.

Further, in the conventional apparatus as described above, it is not possible to remove the sediment in the muddy stream in stormy weather. Generally, when the muddy water is high, the water intake is interrupted and waiting for clarification. It is the actual situation. For this reason, it is necessary to secure reserve water in the water treatment plant, which requires a large reservoir.

[0005]

SUMMARY OF THE INVENTION The present invention uses a fine and strong metal mesh as a filter medium for a strainer provided at a suction port of a water intake pump, and the strainer is regenerated when it is clogged by rotating. It was made possible.

That is, the gist of the present invention is that in a water intake pump installed in flowing water of a river, the water intake is covered with a strainer made of metal mesh, and the strainer is attached to a suction pipe of the water pump. In addition to being rotatably mounted, a nozzle capable of injecting a high-pressure fluid from the inside toward the outside toward the metal mesh is provided in the strainer.

[0007]

The apparatus according to the present invention is configured as described above, and when a highly muddy water flow occurs in a stormy weather or the like, the high-pressure cleaning fluid may be jetted from the nozzle toward the strainer while rotating the strainer. .

By doing so, the sand in the muddy flow is captured by the metal mesh, and the metal mesh that does not become clogged is continuously washed by the high pressure fluid from the nozzle as it rotates, and the strainer is used. It is possible to obtain clear water from which soil has been removed. Then, the removed earth and sand will not be washed away by muddy water and enter the water purification plant. Since the metal mesh forming the strainer is a metal, it can withstand the water intake pressure, and, of course, it is washed when it becomes clogged even in normal times. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 is an intake pump installed on the shore of a river R, which is installed on a pedestal 2 projecting from the river R. Reference numeral 3 is a column of the gantry 2. And, in the suction port 1a portion of this water intake pump 2,
A strainer 4 made of a metal mesh is attached so as to cover this.

The structure of the strainer 4 will be described in detail. The strainer 4 has a cylindrical shape, and upper and lower support rings provided on the upper portion of the strainer 4 between the pedestal 2 and the columns 3 and the river wall. 5 is rotatably supported, and a gear 6 fixed to the upper side is meshed with a pinion 8 linked to a motor 7 mounted on the frame 2 so that it can rotate with respect to the suction port 1a. .

A nozzle tube 9 is provided in the strainer 4 along the side surface and the bottom surface of the strainer 4, and a nozzle 9a provided in the nozzle tube 9 faces the metal mesh of the strainer 4. This nozzle pipe 9 is introduced outside through the discharge pipe of the water intake pump 1 and is connected to the high-pressure washing water pump. Reference numeral 9b is a stay for stabilizing the nozzle tube 9. Further, although the vertical intake pump is shown in FIG. 1, the strainer 4 having the same configuration is used even if it is a horizontal intake pump. See FIG.

The apparatus according to the present invention is constructed as described above, and when the intake river becomes high in concentration in a stormy weather or the like, the strainer 4 is rotated and the high pressure washing water is sprayed from the nozzle pipe 9. Good.

By doing so, the strainer 4 captures and separates the earth and sand in the turbid flow, and the turbid water pushes it away. Then, the earth and sand clogging the eyes of the strainer 4 are backwashed with high-pressure washing water, and clear water can be continuously taken in without clogging.

Needless to say, the pressure of the wash water used during the backwash is higher than the suction pressure of the water intake pump and overcomes the flow pressure of the muddy stream hitting the strainer 4.
In addition, the metal mesh that constitutes the filtration surface of the strainer 4 is also a mesh that can capture turbulent sediment, and
The one having an area having a filtering capacity commensurate with the suction amount of the intake pump is used.

[0015]

As described above, according to the present invention, in a water intake pump from a river to a water purification plant, even if water is taken from highly turbid water such as during stormy weather, it is possible to separate the sediment in the muddy stream. As described above, stable water intake is possible without stopping water intake or destroying the settling basin or the filtration basin of the water purification plant. In particular, in the present invention, since the metal mesh is used as the strainer filter medium and this is rotated, the backwash regeneration is easy and can be used for many years.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a state in which a water intake pump according to the present invention is installed.

FIG. 2 is likewise a vertical cross-sectional view showing a state in which a horizontal shaft type water intake pump is installed.

[Explanation of symbols]

 1 Water intake pump 4 Strainer 9 Nozzle pipe R River

Claims (1)

[Claims] 1. A water intake pump 1 installed in flowing water of a river R, whose water intake is covered with a strainer 4 made of metal mesh, and the strainer 4 is rotatably attached to a suction pipe of the water pump 1. A strainer device provided at the suction port of the intake pump is characterized in that a nozzle 9 capable of injecting a high-pressure fluid from the inside toward the outside is provided inside the strainer 4.