JPS6242643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a liquid jet cleaning device that cleans the inner wall surface of a liquid tank or the circumferential surface of an object housed in the liquid tank, such as a filter or a basket, using a liquid jet force. It is related to.

Conventionally, a hose, nozzle, etc. that spout cleaning liquid has been manually operated by an operator to spray the cleaning liquid onto the object to be cleaned.

This has the disadvantage that the cleaning liquid that collides with the object to be cleaned and the dirt attached to the object are scattered towards the worker, impairing work efficiency, or making cleaning work difficult due to the small space available. Ta.

In order to solve this problem, it is possible to move the liquid jet orifice mechanically, or to provide a large number of liquid jet orifices that are fixed across the entire surface of the object to be cleaned and facing the same. is possible, but
All of these have the disadvantage that the device becomes large and has a complicated structure, making it expensive.

This invention was made in view of the above-mentioned circumstances, and includes a liquid jet pipe that is floated on the liquid surface in the liquid tank by a floating body, and a liquid jet port that opens toward the object to be cleaned in the liquid tank. It is an object of the present invention to provide a jet cleaning device which eliminates the above-mentioned drawbacks.

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be described in detail 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 cylindrical body 2 is closed in a substantially airtight manner by the bottom plate 23.
A raw water inlet 24 is provided in the upper part of the base plate 1, a cleaning liquid 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. be.

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 in the radial direction with a gap between them. 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 body 21.

This liquid jet cleaning device 4 is installed in a state where it is slightly away from the outer peripheral surface of the outer net 31, and includes an annular liquid jet pipe 41 along the outer peripheral surface, a similarly annular floating body 42 attached below this pipe, and one end of which the jet pipe 41 is installed. 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 part of the hose 43 extends outside through the bottom plate 23 located at the lower part of the gap a, and the extending end is connected to the discharge port of the pump 44.

Note that c, d, and e in the figure represent 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 that has flowed 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 is continued, but the filter body 3 becomes gradually contaminated with impurities due to the long-term filtration action, resulting in clogging. This clogging condition is
On the inflow side of raw water, and with filter media such as sand or activated carbon 3
Clogging increases the most in the outer net 31, which has a mesh smaller than the particle size of the filter medium 33 in order to maintain the shape of the filter medium 33.

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 body 3 needs to be cleaned.

When cleaning the filter body 3, valves c and e are closed, pumps 29 and 44 are operated, and then 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 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 tank 2 gradually decreases. The speed at which the water level falls 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 therefore the jet pipe 41, gradually descends along the outer net 31 of the filter body 3, and at this time, the outer surface of the outer net 31 is The cleaning water jetted from the water jet port 45 collides with the part exposed from the water surface, and impurities adhering to this part are removed, and the gap a
It will be discharged to the department.

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 these gaps a are removed to the outside by water flowing out from the gaps a towards the wash 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, thereby cleaning the entire outer surface of the outer net 31. The cleaning of the filter body 31 is 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.
It is more preferable because the inner surface can also be cleaned.

As explained above, this invention has a structure in which a liquid jet pipe that is floated on the liquid surface in a liquid tank by a floating body is provided with a liquid jet port that opens toward an object to be cleaned in the liquid tank. Therefore, since the structure is extremely simple and compact without requiring any special device for moving the liquid jet pipe, there are no blind spots and the cleaning work can be facilitated.

Note that this invention is a container filled with liquid.
It can also be applied to cleaning the inner walls of boxes, swimming pools, etc., and the inside and outside 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 an embodiment of 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. A liquid jet cleaning device in which a liquid jet pipe floated on the liquid surface in a liquid tank by a floating body is provided with a liquid jet port that opens toward an object to be cleaned in the liquid tank.