JPS6320561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid tank in which the inner wall surface of the liquid tank or the circumferential surface of an object housed in the liquid tank, such as a filter or a cage, is cleaned by the jetting force of liquid. The present invention relates to a method for cleaning an object to be cleaned.

Conventional cleaning methods use hoses and
A worker manually directs a nozzle or the like toward the object to be cleaned.

In this method, the cleaning liquid that collides with the object to be cleaned and the dirt attached to the object to be cleaned are scattered towards the worker, impairing work efficiency or making cleaning work impossible in a small space. There were other drawbacks.

In addition, in order to solve this problem, a method of cleaning by installing a large number of jet nozzles facing each other over the entire surface of the object to be cleaned can be considered, but this method requires the cleaning equipment to be large and large in capacity. It can be expensive.

This invention was made in view of the above-mentioned circumstances, and includes an annular floating body attached below the annular jet pipe, and the jet pipe is set upright in the liquid tank while being moved up and down as the water level in the tank rises and falls. It is an object of the present invention to provide a method for cleaning an object to be cleaned, which eliminates the above-mentioned drawbacks by jetting cleaning liquid laterally toward the circumferential surface of the object to be cleaned.

The present invention will be described in detail below based on illustrated embodiments.

Reference numeral 1 denotes a filtration device, in which an annular filter body 3 is arranged upright in a cylindrical water tank 2 in a concentric manner.

In the water tank 2, the top and bottom surfaces of the cylindrical body 21 are connected to the top plate 22.
The bottom plate 23 closes the cylinder 2 in a substantially airtight manner.
A raw water inlet 24 is provided in the upper part of the base plate 1, and a washing water outlet 25 and an inspection window 26 are provided in the lower part thereof, spaced apart from each other in the circumferential direction, and a filtered water outlet 27 is provided in the center of the bottom plate 23. It is provided.

The filter body 3 has a large-diameter outer net 31 and a small-diameter inner net 32 that are formed in a cylindrical shape and are arranged concentrically with an interval in the radial direction. The nets 31 and 32 are filled with a filter medium 33 such as sand or activated carbon, and the upper surfaces of both nets 31 and 32 are closed by a partition plate 34, and the lower surfaces are closed by the bottom plate 23 of the water tank 2. Predetermined gaps a and b are formed between the outer net 31 and the cylindrical body 21 and between the partition plate 34 and the top plate 22.
In addition, the filtered water outlet 2 formed in the center of the bottom plate 23
7 communicates with the lower surface of the inner net 32.

A jet cleaning device 4 according to the present invention is installed in the gap a between the outer net 31 and the cylindrical member 21.

This jet cleaning device 4 consists of an annular jet pipe 41 that runs along the outer peripheral surface of an outer net 31 at a distance from the outer peripheral surface, a floating body 42 that is also annular and attached below this, and one end of which is connected to the jet pipe 41. It consists of a flexible hose 43 connected to a liquid pipe 41 and the other end connected to a pump 44. In the inner peripheral wall of the liquid jet pipe 41 facing the outer net 31, a large number of liquid jet ports 45 are bored at approximately equal pitches over the entire circumferential direction, and the floating bodies 42 are filled in the gap a. It is made of, for example, a foamed or hollow synthetic resin ring whose specific gravity is lighter than that of the raw water, and is designed to obtain sufficient buoyancy to float the jet pipe 41 above the raw water surface.

Further, the lower portion of the hose 43 extends outside through the bottom plate 23 located below the gap a, and the extending end portion is connected to the discharge port of the pump 44.

In addition, c, d, and e in the figure are raw water inlet 2, respectively.
4. The valves provided at the wash water outlet 25 and the filtered water outlet 27. The transparent plate 29 attached to the inspection window 26 is a pump connected to the upstream side of the valve e of the filtered water outlet 27.

Next, the operation of the above configuration will be explained.

First, when operating the filtration device 1, valve d is closed and valves c and e are opened. Thereby, raw water flows into the water tank 2 from the raw water inlet 24.

The raw water flowing into the water tank 2 fills the gaps a and b, passes through the filter body 3, becomes fresh water, and flows out toward the filtered water outlet 27. On this occasion,
Buoyancy is generated on the floating body 42 by the raw water filling the gaps a and b, and the jet pipe 41 is lifted up in the water tank 2 together with the floating body 42, and is in contact with the lower surface of the top plate 22.

In this state, the operation of the filtration device 1, that is, the filtration action continues, but the filter body 3 becomes gradually contaminated with impurities and becomes clogged due to the long-term filtration action. In this clogging state, the clogging of the outer net 31, which is on the inflow side of the raw water and has a mesh smaller than the particle size of the filter medium 33 to maintain the shape of the filter medium 33 made of sand, activated carbon, etc., increases most. I will do it.

The degree of clogging is confirmed by the inspection window 26 or the inflow resistance on the raw water inlet side, and when the clogging exceeds a predetermined amount, the filter 3 needs to be cleaned.

When cleaning the filter body 3, the valves c and e are closed, the pumps 29 and 44 are started, and then the valve d is opened.

As a result, the cleaning liquid (clean water) pressurized by the pump 44 is discharged from the liquid injection port 45 of the liquid injection pipe 41, and the cleaning liquid (clean water) pressurized by the pump 29 is discharged from the filtered water outlet 27. It is supplied to the body 3 from its inner net 32 direction. At the same time, the water in the water tank 2 is discharged to the outside from the wash water outlet 25, and the water level in the gaps a and b in the water tank 2 gradually decreases. The rate at which the water level drops is adjusted by the opening degree of valve d.

As the water level in the gaps a and b decreases, the floating body 42 and hence the jet pipe 41 gradually descend along the outer net 31 of the filter body 3, and at this time,
The cleaning water jetted from the water jet port 45 collides with the part of the outer surface of the outer net 31 exposed from the water surface, and impurities adhering to this part are removed and expelled to the gap a part. .

Further, impurities that have entered the filter medium 33 are discharged into the gap a through the outer net 31 by the washing water from the filtered water outlet 27 that flows from the inner net 32 side to the outer net 31 side. become.

The impurities discharged into the gap a are removed to the outside by water flowing out from the gap a towards the cleaning water outlet 25.

When the water level in the gap a drops to the lowest part (bottom plate 23), the jet pipe 41 also drops to the vicinity of the lowest part of the outer net 31, and as a result, the outer surface of the outer net 31 spreads over its entire circumference. The cleaning of the filter body 31 is now completed.

The degree of cleaning can be visually checked through the inspection window 26, and when a predetermined cleaning result is obtained, the pumps 29 and 44 are stopped, valves d are closed, and valves c and e are opened. Therefore, if the raw water is allowed to flow into the water tank 2 again from the raw water inlet 24 and the filtration device 1 is restarted, the original filtration performance will be exhibited.

Note that the liquid jet port 4 provided in the liquid jet pipe 41 is
5 on the side facing the inner surface of the cylindrical body 21, the cylindrical body 21 can be connected to the outer net 31 at the same time.
The inner surface can also be cleaned, which is more preferable.

As explained above, this invention arranges an annular jet pipe around the circumference of an object to be cleaned that is set upright in a liquid tank,
A ring-shaped floating body is attached below it. When cleaning the object to be cleaned, the raw water in the tank is drained and poured to raise and lower the water level, thereby raising and lowering the spouting pipe. Therefore, even without a separate elevating device, the ejection pipe can be raised and lowered simply by pouring water into the tank.

Furthermore, since the cleaning water is spouted horizontally while moving the spouting pipe up and down, it is possible to easily clean even a small space that cannot be accessed by an operator without the operator's assistance.

Since the annular jet pipe moves up and down, the object to be cleaned can be cleaned over its entire surface without creating a blind spot, although the structure is simple and compact.

Moreover, since the amount of cleaning liquid ejected per unit time can be reduced, a small and small-capacity pump for supplying the cleaning liquid is sufficient.

Note that this invention is applicable to containers, boxes, and containers filled with liquid.
It can also be applied to cleaning the inner wall surfaces of swimming pools and the like, and to cleaning the inner and outer surfaces of objects housed therein, such as frames and baskets.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing a method for cleaning an object to be cleaned according to the present invention. 1... Filtration device, 2... Water tank, 21... Cylindrical body, 22... Top plate, 23... Bottom plate, 24... Raw water inlet, 25... Washing water outlet, 26... Inspection window, 27 ...Filtered water outlet, 28...Transparent plate, 2
9... pump, 3... filter body, 31... outer net, 32... inner net, 33... filter medium, 34...
…Partition plate, 4…Spray cleaning device, 41…Spray pipe, 42…Floating body, 43…Hose, 44…
Pump, 45... Liquid spout.

Claims (1)

[Claims] 1. An annular jet pipe is arranged horizontally along the circumferential surface of the object to be cleaned that is set up in the liquid tank, and
A to-be-cleaned device characterized in that an annular floating body is attached below the spouting pipe, and while the spouting pipe is moved up and down by pouring and draining raw water into the tank, the cleaning liquid is spouted laterally. How to wash your body.