JP2965888B2 - Strainer device for outlet of water storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strainer for an outlet for preventing dust from being mixed when water in a water tank for industrial or agricultural use is supplied to a water supply facility.

[0002]

Conventionally, in order to remove dust mixed in a water storage tank, an expensive dust removing strainer device is changed from a large mesh to a small mesh in a water distribution pipe downstream of the water tank. It was installed over four stages. However, due to hydraulic calculations, such an in-pipe dust remover is 1 to 1 for each stage.
A head difference of ² kg / cm ² occurs. For that reason, when the dust removing strainer is installed in the pipe, it is necessary to mount the water tank on a high gantry or to install a pump to perform pumping, resulting in an increase in equipment costs.

[0003] The strainer installed in the pipeline has to determine the diameter of the strainer in proportion to the pipe diameter, so that the area of the mesh material of the strainer is limited, and the mesh material area of the strainer for the pipeline is usually 100 to 100 mm. The limit is about 500 cm ² . For this reason, the period until clogging was short, and frequent cleaning was required.

The present invention has been made in view of the above problems. The objective is to eliminate head loss due to strainers in the pipeline, to use the head of the water tank entirely as pressure for water distribution, and to eliminate the need for a pressurizing device such as a pump, thus reducing equipment costs. Another object of the present invention is to provide a strainer for an outlet of a water storage tank, which can increase the area of the strainer, increase the period until clogging, and reduce the frequency of cleaning.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a strainer for an outlet which is installed over an outlet mass constituting an outlet of a water storage tank. It is characterized by comprising a basket-shaped strainer having a mesh material stretched on its surface, a dust receiving flange protruding outside the bottom surface of the strainer, and a dust receiving wall rising around the flange outer peripheral edge.

A strainer device according to a second aspect of the present invention uses a multiple cage type strainer in which a plurality of single cage type strainers having different dimensions are superposed in multiple layers instead of the cage type strainer according to the first aspect, and the density of the mesh material mesh is adjusted to the outside. The inside is denser than the one.

[0007]

The outflow strainer device has the above-mentioned structure and performs the following operations.

In this device, since a strainer is placed on an outflow mass constituting an outlet, there is no head loss as in the case where a strainer is provided on a conventional pipeline, and the head of a water storage tank is pressured for 100% water distribution. Can be used effectively.

The bottom surface of the basket-shaped strainer is adjusted to the size of the outflow mass, for example, a square having a side of 50 cm and a height of 1 cm.
m, the area of the mesh material attached to the peripheral surface, excluding the bottom surface, becomes a large area of about 20,000 cm ² , the period until clogging becomes longer, and the frequency of strainer cleaning can be significantly reduced.

A dust receiving flange projects outside the bottom surface of the strainer, and a dust receiving wall surrounds the outer peripheral edge thereof. Therefore, when the strainer is lifted for cleaning, dust near the outer periphery is lifted and removed together with the strainer. It can be prevented from being scattered and mixed into the tank or the outflow pipe again.

A strainer device according to a second aspect of the present invention uses a multiple cage type strainer obtained by superposing a plurality of cage type strainers in a multiplex manner. By removing dust in multiple stages with different mesh materials, the period until clogging can be further lengthened.

[0012]

1 shows a strainer device according to the first embodiment.
As shown in FIG. 2, the apparatus 1 is placed over an outflow mass 3 which constitutes an outlet of a water storage tank 2, and is provided with a basket-shaped strainer 4 and a dust receiving flange 5 projecting outward from the bottom.
And a dust receiving wall 6 rising around the outer peripheral edge of the flange.

The cage-shaped strainer 4 has a mesh member 8 made of a wire mesh stretched on five peripheral surfaces except the bottom surface of the rectangular parallelepiped frame 7, and the dust receiving flange 5 has a rectangular shape in a plan view, and stands up on an outer peripheral edge thereof. A mesh material is stretched over the waste receiving wall 6. Further, two lifting hooks 9 are protruded from the upper portion of the frame 7.

The strainer device 1 having the open bottom surface aligned with the outflow mass 3 removes dust in the outflow water flowing into the outflow mass 3 with the mesh material on the peripheral surface of the basket-shaped strainer 5. At the time of cleaning the strainer, it is hung on the hook 9 and lifted, taken out of the tank, and washed. At the time of lifting, dust in the vicinity of the strainer peripheral surface accumulates in the dust receiving flange 5 surrounded by the dust receiving wall 6 made of a mesh material, is lifted out of the tank together with the strainer device, and is not mixed into the water tank again. Absent.

FIG. 3 shows a strainer device according to a second aspect. This apparatus 1 replaces the cage strainer 4 shown in FIG. Is used. In each of the strainers alone, the mesh material 5 is stretched on five circumferential surfaces except the bottom surface of the rectangular parallelepiped frame 7, and the mesh density of the mesh material of the strainer alone is denser on the inside than on the outside. . That is, the density of the mesh material is increased in the order of the strainers 4-1, 4-2, and 4-3.

This strainer device also functions to remove dust in the effluent water by installing the open bottom surface of the innermost strainer 4-3 of the multiple basket type strainer on the outflow mass 3. This device removes dust with a three-stage strainer that becomes denser in order from the outside to the inside of the mesh, so that clogging is less likely to occur and the frequency of cleaning can be reduced.

FIGS. 4 and 5 are detailed views of a strainer device using a multi-cage strainer 4 'in which three basket-shaped strainers 4-1, 4-2, and 4-3 each having a rectangular parallelepiped shape are stacked. .

The strainer unit 4-1 of this apparatus is (bottom 50 × 50 cm) (height 70 cm) (mesh density 10 mm
Corner), 4-2 (bottom 35 × 35cm) (height 60cm)
(Mesh density 3.3 mm square), 4-3 (bottom 20 × 20c)
m) (height 50 cm) (mesh density 1.5 mm square).

As shown in FIGS. 4 and 5, at four corners of the dust receiving flange 5 of the strainer device 1, there are provided anchor holes 10 for engaging and fixing to an anchor projecting from the bottom of the water storage tank. Provided, strainer unit 4-1 and 4-
A patch lock 11 for locking and fixing to the dust receiving flange 5 is attached to the lower end of the side face of 2, 4-3.

In the above-described embodiment, a basket-shaped strainer is used as the basket-shaped strainer. Alternatively, a basket-shaped strainer having a three-dimensional shape such as an arc or a cone may be used.

[0021]

The present invention has been described above, and this strainer device has the following effects.

(A) There is no head loss in the drainage pipe, and no equipment for increasing the water supply pressure is required, so that the cost of the water tank equipment can be reduced.

(B) The frequency of cleaning the strainer is reduced,
Labor saving in maintenance can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of the strainer device of the first embodiment.

FIG. 2 is a cross-sectional view of the strainer device according to claim 1, which is placed over an outflow mass of a water storage tank.

FIG. 3 is a cross-sectional view of the strainer device according to claim 2, which is placed over the outflow mass of the water storage tank.

FIG. 4 is a plan view of the strainer device of the second embodiment.

FIG. 5 is a side view showing a partial cross section of the strainer device of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Strainer device, 2 ... Water tank, 3 ... Outflow mass, 4 ... Cage-shaped strainer, 4 '... Multi-cage strainer, 5 ... Dust receiving flange, 6 ... Dust receiving wall, 7
... frame, 8 ... mesh material, 9 ... hooks, 10 ... anchor holes, 11 ... patchin tablets.

Claims (2)

(57) [Claims] 1. An outflow strainer device to be placed over an outflow mass constituting an outflow opening of a water storage tank, the basket having a mesh material stretched on a peripheral surface excluding a bottom surface opened on the outflow mass. A strainer for an outlet of a water storage tank, comprising: a shaped strainer; a dust receiving flange protruding outside the bottom surface of the strainer; and a dust receiving wall rising around the outer edge of the flange. 2. An outflow strainer device to be placed over an outflow mass constituting an outflow opening of a water storage tank, wherein a mesh material is stretched on a peripheral surface excluding a bottom surface opened on the outflow mass. Basket-type strainer consisting of a plurality of cage-type strainers that are different from each other, a dust-collecting flange protruding outside the bottom of the multi-cage strainer, and a dust-receiving wall rising around the flange outer edge. A strainer device for an outlet of a water storage tank, wherein a mesh material of a cage type strainer alone constituting a shape strainer has a denser mesh than an outer mesh material.