JP2003112132A - Method for exchanging washing water and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suitably exchange washing water. SOLUTION: The washing water jetted against a substrate 1 is recovered in a washing water tank 10. The washing water is sucked by a washing water pump 20 and used for washing by jetting it against a substrate again. A plurality of suction filters 12 and 14 are formed. When one suction filter 12 suffers clogging, the other suction filter 14 is selected. Water is supplied into the washing tank 10 through the clogged suction filter 12 from a backward washing mechanism to wash the suction filter 12. When the level of the washing water in the washing tank 10 is raised, the washing water is judged to be fouled, and the washing water is discharged while water is supplied to the washing tank 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning water exchange method and apparatus for exchanging cleaning water when cleaning water for cleaning an object to be cleaned is contaminated.

[0002]

2. Description of the Related Art Conventionally, as a method and apparatus for cleaning an object to be cleaned such as a pallet with cleaning water, as shown in FIG. 3, cleaning water is sprayed from a plurality of nozzles 102 onto an object to be cleaned 100 for cleaning. Methods and devices are known. In this method and apparatus, the cleaning water sprayed on the object to be cleaned 100 is collected in the cleaning tank 104, and the collected cleaning tank 104 is collected.
The cleaning water in the nozzle 10 is sucked into the cleaning pump 108 through the suction filter 106, and the cleaning pump 108 discharges the nozzle 10
There is known a method and apparatus in which the cleaning water is supplied to the nozzle 2, the cleaning water is sprayed to clean the object to be cleaned, and the cleaning water is circulated.

[0003]

However, according to such a conventional method and apparatus, the replacement of the wash water by the dirt of the wash water collected in the wash tank 104 is visually troublesome to the operator, and the operation is troublesome and the dirt is reduced. However, there is a problem that the judgment may not always be made properly. Also, if the cleaning water is replaced at regular intervals, it may be replaced even though it does not necessarily need to be replaced. There was a problem that exchange was not performed.

An object of the present invention is to provide a cleaning water exchange method and apparatus for appropriately exchanging cleaning water.

[0005]

In order to achieve the above object, the present invention takes the following means in order to solve the object. That is, the cleaning water sprayed on the object to be cleaned is collected in the cleaning tank,
In a cleaning method in which the cleaning water is sucked into a cleaning pump through a suction filter and sprayed again on the object to be cleaned, a plurality of the suction filters are provided,
When one of the suction filters is clogged, the other suction filter is switched to, and further, the clogged suction filter is washed with water supplied from outside the washing tank, and when the washing water in the washing tank becomes dirty, This is a method for exchanging cleaning water, in which the cleaning water in the cleaning tank is discharged and the cleaning water is supplied to the cleaning tank to replace the cleaning water.

Further, a cleaning tank for collecting the cleaning water sprayed on the object to be cleaned and a cleaning pump for sucking the cleaning water in the cleaning tank through a suction filter and spraying the cleaning water on the object to be cleaned are provided. In the cleaning device,
A plurality of suction filters are provided, a switching mechanism that switches the connection between the cleaning pump and the plurality of suction filters is provided, and a detection unit that detects clogging of the suction filter and the cleaning through the suction filter are provided. A backwash mechanism for supplying water to the tank, and the suction filter whose clogging is detected by the detection means is supplied from the backwash mechanism to wash the suction filter, and when the wash water in the wash tank is contaminated, the A cleaning water exchanging device is provided with control means for discharging the cleaning water from the cleaning tank and supplying the cleaning tank with water to replace the cleaning water.

Further, a liquid level detecting means for detecting the liquid level of the cleaning water in the cleaning tank is provided, and the control means determines that the cleaning water is discharged when the liquid level detecting means detects a liquid level rise. It may be determined that the cleaning water is discharged, and the cleaning water may be discharged and water may be supplied to the cleaning tank. Alternatively, an overflow adjusting mechanism may be further provided for discharging the cleaning water in the cleaning tank through a throttle valve and adjusting the throttle amount of the throttle valve to adjust the discharge amount.

The control means may be so constructed that, when the number of times of switching the suction filter is increased, the cleaning water is judged to be contaminated and the cleaning water is discharged and water is supplied to the cleaning tank. . Further, the time until the suction filter is clogged may be changed by changing the mesh of the suction filter. The detection means may be a pressure detection sensor that detects an increase in the suction resistance of the cleaning pump, or the detection means may be a pressure detection sensor that detects a decrease in the discharge pressure of the cleaning pump.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes an object to be cleaned such as a pallet, which is conveyed in a direction perpendicular to the drawing by a conveying device (not shown). Cleaning object 1 to be transported
A plurality of nozzles 2 for injecting cleaning water toward the object to be cleaned 1 are arranged around, and each nozzle 2 is connected to a nozzle arch 4.

The cleaning water sprayed from the nozzle 2 is collected in the cleaning tank 10 through the gutter 6 and the drop filter 8. In the cleaning tank 10, a plurality of suction filters 12, 1 in this embodiment are provided.
4 is provided, and both suction filters 12 and 14 are provided.
Are connected to the suction side of the cleaning pump 20 via suction pipe lines 16 and 18, respectively.

Pilot-type on-off valves 22 and 24 are provided in both intake pipe lines 16 and 18, and the pilot-type on-off valves 22 and 24 are opened and closed by introducing compressed air from the outside as pilot pressure. Is the valve. Pilot pressure is
It is controlled according to the excitation signal from the control circuit 29 to the switching valves 26, 28 connected to the air pressure source 25.

The cleaning pump 20 is driven by a motor 30 and supplies the cleaning water sucked through the suction pipe lines 16 and 18 to the nozzle arch 4. On the discharge side of the cleaning pump 20, a pressure detection sensor 32 that detects the discharge pressure as detection means is provided. In this embodiment, the pilot-type on-off valves 22 and 24 work as a switching mechanism.

On the other hand, an auxiliary tank 36 connected to the water supply source 34 is provided, and the water stored in the auxiliary tank 36 is supplied to the water supply conduit 42 by a backwash pump 40 driven by a motor 38. Is configured. The water supply conduit 42 is connected to the cleaning tank 10 via an electromagnetic opening / closing valve 44.

Further, the water supply pipe line 42 is connected to the pilot type opening / closing valves 22, 24 via the pilot type opening / closing valves 46, 48.
Suction line 1 closer to the suction filters 12 and 14 than the suction filter 1
6 and 18, respectively. The pilot-type on-off valves 46 and 48 are valves configured to open and close by introducing compressed air from the outside as pilot pressure. Pilot pressure is
It is controlled according to the excitation signal from the control circuit 29 to the switching valves 50 and 52 connected to the air pressure source 25. In the present embodiment, the water supply source 34, the auxiliary tank 36, the motor 38,
Backwash pump 40, water supply line 42, pilot type on-off valve 4
The backwash mechanism is composed of 6, 48. The backwash mechanism
Not limited to this, when the water supply pressure of the water supply source 34 is sufficiently high, the water supply source 34 may be directly connected to the water supply pipeline 42 without providing the auxiliary tank 36, the motor 38, and the backwash pump 40.

A drain pipe line 54 capable of discharging washing water is connected to the washing tank 10, and a pilot type on-off valve 56 is interposed in the drain pipe line 54. The pilot type on-off valve 56 is a valve configured to open and close by introducing compressed air from the outside as pilot pressure. The pilot pressure is controlled according to the excitation signal from the control circuit 29 to the switching valve 58 connected to the air pressure source 25.

The drain pipe 54 communicates with the sewage pit 60, and the sewage stored in the sewage pit 60 is discharged to the outside by the drainage pump 62.
The cleaning tank 10 is provided with a liquid surface detection sensor 64 that detects the liquid surface level of the collected cleaning water. Also,
The sewage pit 60 is also provided with a liquid level detection sensor 66 for detecting the liquid level of sewage. When the liquid level of the sewage detected by the liquid level detection sensor 66 reaches a predetermined level, the drainage pump 62 is driven to discharge the sewage.

Next, the operation of the above-described cleaning apparatus of the present embodiment will be described along the procedure of the method for cleaning an object to be cleaned. First, the pilot pressure is introduced into one pilot type on-off valve 22 to open the pilot type on-off valve 22. Then, the cleaning pump 20 is driven to suck the cleaning water in the cleaning tank 10 from one of the suction filters 12 and supply it to the nozzle arch 4. The cleaning water supplied to the nozzle arch 4 is sprayed from the plurality of nozzles 2 toward the object to be cleaned 1 to clean the object to be cleaned 1.

The cleaning water sprayed on the object to be cleaned 1 is guided to the cleaning tank 10 by the gutter 6 and collected. Cleaning object 1
Dust such as dust and sand is mixed in the cleaning water collected in the cleaning tank 10 by the cleaning. Suction filter 1
After filtering these dusts from the wash water by 2, the wash water is sucked into the wash pump 20. Then, the cleaning water is supplied from the cleaning pump 20 to the nozzle arch 4, is sprayed from the nozzle 2 to the object to be cleaned 1, and the cleaning water is circulated and used.

A large amount of dust is trapped in the suction filter 12 by the circulating use of the washing water, and the suction filter 12 is clogged. Suction filter 12
Is clogged, the pressure of the cleaning water supplied from the cleaning pump 20 to the nozzle arch 4 decreases.

When this pressure is detected by the pressure detection sensor 32 and the pressure becomes equal to or lower than a predetermined pressure, one pilot type on-off valve 22 is closed and the other pilot type on-off valve 24 is opened. The pressure detection sensor 32
Instead of detecting the decrease in discharge pressure by, the increase in suction resistance may be detected. For example, the cleaning pump 2
The suction side pressure of 0 may be detected and the increase in suction resistance may be determined from this pressure.

As a result, the cleaning pump 20 sucks the cleaning water through the other suction filter 14 and supplies it to the nozzle arch 4. At this time, the backwash pump 40
And the pilot type on-off valve 46 is opened by the control circuit 29 for a certain period of time. As a result, the water in the auxiliary tank 36 becomes
It is supplied to the cleaning tank 10 via the suction pipe line 16 and the suction filter 12. At that time, dust causing the clogging is washed off from the suction filter 12, and the clogging is eliminated.

When the cleaning object 1 is continuously cleaned by circulating the cleaning water, the other suction filter 14 also becomes clogged. At that time, similarly, the pilot type on-off valve 24
And the pilot type on-off valve 22 is opened. Then, again, the cleaning water is sucked through the suction filter 12 on one side and ejected from the nozzle 2.

Further, the pilot type on-off valve 48 is opened, and water is supplied from the backwash pump 40 to the cleaning tank 10 via the water supply pipe 42, the pilot type on-off valve 48, the suction pipe 18, and the suction filter 14. . At that time, the clogging of the other suction filter 14 is eliminated.

By repeating this, while the cleaning water is being circulated, a large amount of dust such as dust and sand is accumulated in the cleaning tank 10 and the cleaning water becomes dirty. Both suction filters 12, 14
Since the backwash pump 40 supplies water to the cleaning tank 10 while switching between and using, the liquid level of the cleaning water in the cleaning tank 10 rises. This rise in the liquid level is detected by the liquid level detection sensor 64, and when the liquid level exceeds a predetermined level, it is determined that the cleaning water in the cleaning tank 10 has become dirty. Instead of the detection of the liquid level rise by the liquid level detection sensor 64, the number of times the pilot type on-off valves 22 and 24 are switched is counted, and when the number of times is a predetermined number or more, the cleaning tank 10 It may be determined that the cleaning water is dirty.

Then, the pilot type on-off valve 56 is opened, and the cleaning water in the cleaning tank 10 is discharged to the dirty water pit 60 via the drain conduit 54. In addition, the backwash pump 40
Is driven, the electromagnetic opening / closing valve 44 is opened, the water in the auxiliary tank 36 is supplied to the cleaning tank 10, and the cleaning water in the cleaning tank 10 is replaced with new water.

As shown in FIGS. 1 and 2, the cleaning tank 10 may be provided with an overflow mechanism 68. The overflow mechanism 68 includes a throttle valve 68a that discharges the wash water from the wash tank 10 to the dirty water pit 60. By adjusting the throttle amount of the throttle valve 68, the rise of the level of the wash water is controlled to control the wash water. The replacement timing may be adjusted. In addition, the suction filters 12, 14
Change the mesh of the two pilot type on-off valves 22,2
The switching timing of 4 may be changed to adjust the replacement timing of the wash water.

The present invention is not limited to such an embodiment as described above, and can be carried out in various modes without departing from the scope of the present invention.

[0028]

As described above in detail, according to the cleaning method of the present invention, it is possible to properly exchange the cleaning water. Further, according to the cleaning device, there is an effect that the cleaning water is automatically and appropriately replaced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cleaning device as an embodiment of the present invention.

FIG. 2 is an enlarged explanatory diagram of an overflow mechanism of this embodiment.

FIG. 3 is a schematic configuration diagram of a conventional cleaning device.

[Explanation of symbols]

1, 100 ... Object to be cleaned 2, 102 ... Nozzle 4 ... Nozzle arch 6 ... Gutter 8 ... Drop filter 10, 104 ... Wash tank 12, 14, 106 ... Suction filter 16, 18 ... Suction pipe line 20, 108 ... Wash pump 22, 24, 46, 48, 56 ... Pilot type on-off valve 26, 28, 50, 52, 58 ... Switching valve 29 ... Control circuit 32 ... Pressure detection sensor 36 ... Auxiliary tank 40 ... Backwash pump 42 ... Water supply line 44 ... electromagnetic on-off valve 54 ... drain line 60 ... dirty water pit 62 ... drainage pumps 64, 66 ... liquid level detection sensor 68 ... overflow mechanism

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 35/16 B01D 29/04 530A B08B 3/14 29/36 D 29/38 501 (72) Inventor Kataoka Keiji 25, Ishihara, Ishii-cho, Anjo City, Aichi Prefecture F-machine inside Kataoka Co., Ltd. (reference) 3B201 AA46 BB02 BB04 BB21 BB62 BB92 CD22 CD41 4D064 AA03 BB05 DC05

Claims (8)

[Claims] 1. A cleaning method in which cleaning water sprayed on an object to be cleaned is collected in a cleaning tank, and the cleaning water is sucked into a cleaning pump through a suction filter and sprayed again on the object to be cleaned, wherein A plurality of suction filters are provided, and when one of the suction filters is clogged, the suction filter is switched to the other suction filter, and the clogged suction filter is washed with water supplied from outside the washing tank to wash the washing tank. When the water becomes dirty, the cleaning water in the cleaning tank is discharged, and the cleaning water is supplied to the cleaning tank to replace the cleaning water. 2. A cleaning tank for collecting the cleaning water sprayed onto the object to be cleaned, and a cleaning pump for sucking the cleaning water in the cleaning tank through a suction filter to spray the cleaning water onto the object to be cleaned. In the cleaning device, a plurality of the suction filters are provided, a switching mechanism that switches the connection between the cleaning pump and the plurality of suction filters is provided, and a detection unit that detects clogging of the suction filter, and the suction filter. Through a backwash mechanism for supplying water to the cleaning tank through the suction filter, and the suction filter in which clogging is detected by the detection means is supplied from the backwash mechanism to wash the suction filter, and the wash water in the cleaning tank is When it gets dirty, drain the cleaning water from the cleaning tank and supply water to the cleaning tank. Washing water exchange device being characterized in that a control means for exchanging the purified water. 3. A liquid level detection means for detecting the liquid level of the cleaning water in the cleaning tank is provided, and the control means comprises:
When the liquid level rise is detected by the liquid level detection means,
The cleaning water exchange device according to claim 2, wherein when the cleaning water is judged to be dirty, the cleaning water is discharged and the cleaning water is supplied to the cleaning tank. 4. The overflow adjusting mechanism is further provided for discharging the cleaning water of the cleaning tank through a throttle valve and adjusting the throttle amount of the throttle valve to adjust the discharge amount. Item 3. The flush water exchange device according to item 3. 5. The control means, when the number of times of switching the suction filter is increased, determines that the cleaning water is dirty, drains the cleaning water, and supplies the cleaning tank with water. The flush water exchange device according to claim 2. 6. The cleaning water exchange apparatus according to claim 2, wherein a time until clogging of the suction filter is changed by changing a mesh of the suction filter. 7. The cleaning water exchange device according to claim 2, wherein the detection means is a pressure detection sensor that detects an increase in suction resistance of the cleaning pump. 8. The cleaning water exchange device according to claim 2, wherein the detection means is a pressure detection sensor that detects a decrease in discharge pressure of the cleaning pump.