JPH0426472Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention automatically detects the degree of contamination of a cleaning liquid in a cleaning liquid tank used during continuous washing of fabrics, and improves the degree of contamination of the cleaning liquid. The present invention relates to a sensor for detecting the degree of contamination of a cleaning liquid in a cleaning liquid tank for fabrics, in which fresh water is added to the cleaning liquid to enhance the cleaning effect of the cleaning liquid on the fabric in the cleaning liquid tank.

[Background of the invention] After industrially produced long fabrics are subjected to treatments such as pretreatment and dyeing treatment, it is necessary to wash the fabrics following these treatments. Therefore, in the past, various cleaning devices have been developed to effectively clean these long fabrics. Conventional cleaning devices of this type can be roughly divided into immersion type, in which the fabric is continuously passed through a cleaning liquid tank filled with cleaning liquid, and water jet type, in which cleaning water is sprayed towards the fabric as it is continuously transferred. However, in the former type of immersion type washing apparatus, the washing water in the liquid tank becomes contaminated as time passes for washing the fabric, and the washing effect gradually decreases. In addition, in the latter type of water jet type washing device, since fresh water is constantly applied towards the fabric, a large amount of fresh water is consumed.
There were problems from the perspective of water resources.

In view of these problems, the inventor of the present invention constantly detects the degree of contamination of the wash water in the wash water tank in which the fabric to be washed is immersed and passes through the wash water, and makes sure that the degree of contamination of the wash water reaches a predetermined setting. A continuous fabric washing device that can add fresh water to the washing water to enhance the washing effect of the fabric when the washing water exceeds the specified value, and also to save water resources. The contamination degree detection sensor for such continuous cleaning equipment detects the degree of contamination of the cleaning liquid in the cleaning liquid tank using an optical sensor consisting of a pair of light emitters and a photoreceptor fixed in such a way as to sandwich the cleaning liquid flow path. This is detected by the amount of light transmitted by the sensor, but since the distance between the pair of light emitters and the photoreceptor is constant, for example, a liquid with a high contamination concentration may pass between the emitter and the photoreceptor. If the contaminant concentration reaches such a level that the light received by the photoreceptor is not detected, it is naturally impossible to detect a higher contaminant concentration.Therefore, it is necessary to accurately detect the higher contaminant concentration. There was a problem that it was not possible.

[Purpose of invention]

The present invention has been developed by focusing on such conventional problems, and it is possible to measure the contamination concentration by adjusting the amount of light received by the light emitting element of the optical sensor in accordance with the contamination concentration of the processing liquid. It is an object of the present invention to provide a sensor for detecting the degree of contamination of a cleaning liquid, which can extend the range and accurately detect the contamination concentration even if the contamination concentration is high or low.

[Example of idea]

The present invention will be explained in detail below based on embodiments shown in the drawings.

First, let's talk about continuous fabric cleaning equipment: 1.
2 is a long fabric to be washed; 2 is a washing tank through which the fabric 1 is continuously passed; a guide roll 3 is arranged in the washing tank 2 to guide the fabric 1 in a meandering manner. The cleaning water tank 2 also has an overflow port 4 and an overflow port 4.
A drain port 5 is provided at a lower position, and a drain tube 6 is connected to the drain port 5 in an upright state. Reference numeral 7 indicates an electromagnetic valve for replenishing fresh water into the wash water tank 2, and reference numeral 8 indicates a valve for discharging overflow wash water.

Cleaning fluid contamination level detection sensor 9 which is the gist of the present invention
is provided in the middle of the drain pipe 6, and its structure is shown in FIG. Reference numeral 10 denotes a cylindrical body connected to the middle of the drain pipe 6, and a light emitter 11 and a light receiver 12 are disposed opposite to each other at diametrically symmetrical positions on the cylindrical body 10. The receiver 11
1 is a light projecting case 15 that is watertightly fitted into a through hole 13 formed in the radial direction on the side surface of the cylindrical body 10.
and a light source 16 inside the light projection case 15.
At the same time, a light emitting lens 17 is attached to the tip of the case 15 on the inside side of the cylindrical body. Further, the case 15 is provided with a cold air supply port 19 and an exhaust port 20 for preventing heating by the light source 16, so that heating inside the light emitting device 11 can be suppressed. Reference numeral 21 denotes a condenser lens disposed opposite to the light emitting lens 17, and a light shielding plate 14 provided with a rectangular transparent window 22 as shown in FIG. 3 is attached to the back surface of the condenser lens 21. Furthermore, a light shielding plate 26 provided with a rectangular light-transmitting window 18 is rotatably superimposed on the back surface of the light shielding plate 14. Furthermore, a photoelectric exchange element 23 that receives light passing through the light-shielding window 18 is provided on the back side of the light-shielding plate 26. 27
2 is a drive motor for rotating the light shielding plate 26, 28 is a drive gear, and 24 is a photoelectric exchange element 2 thereof.
3 is a control circuit for operating the drive motor 27 and the electromagnetic valve 7 based on the amount of received light; 25 is a sealing material for the lead wire extension portion;

The above is the configuration of this embodiment.Next, its operation will be described.Normally, both rectangular light-shielding windows 22 and 18 provided on the two light-shielding plates 14 and 26 are arranged as shown in FIG. The light shielding windows 22 and 18 are arranged in a cross shape so that the amount of light transmitted through the light shielding windows 22 and 18 is minimized. Therefore, the fabric 1 is continuously transferred while being immersed in this washing water tank 2 to wash the fabric 1. However, as the washing of the fabric progresses, the washing water in the water tank 2 gradually becomes contaminated. However, this contaminated wash water flows into the drain pipe 6. At this time, the light source 16 of the light emitter 11 is lit and the light is emitted to the light receiver 12. Therefore, if the degree of contamination of the cleaning water in the drain pipe 6, that is, the degree of turbidity, is large, the amount of light received by the light receiver 12 becomes less. When the control circuit 24 detects that the amount of light received by the light receiver 12 is weak, the electromagnetic valve 7 is opened in response to this detection signal, and fresh water is supplied into the cleaning water tank 2. . However, as mentioned above, both rectangular transparent windows 18 and 22 cross each other and the amount of transmitted light from the light emitter 11 is narrowed down to be small, for example, as shown by curve a in FIG. As shown, when the pollution concentration is about 0.02% or more, the turbidity index becomes more than 100 (the amount of light received is 0),
Concentrations higher than that cannot be detected. Therefore, in this embodiment, when it is detected that the turbidity index has reached 100, the output from the control circuit 24 is used to control the drive motor 27.
to rotate the light shielding plate 26 of the light receiver 12 by about 45 degrees. As a result, the amount of light received by the light receiver 12 is approximately 2
As a result, as shown by curve b in Figure 4, contamination concentrations up to about 0.04% can be detected. Similarly, when the turbidity index reaches 100 as a result of detection at a 45-degree displacement position of the light-transmitting window 18 of the light-shielding plate 26, the drive motor 27 is operated again and the light-shielding plate 26 of the light receiver 12 is moved further 45 degrees. Rotate both transparent windows 18
and 22 match and the amount of received light is increased to about three times the initial amount of received light, so that a contamination concentration of up to about 0.065% is detected as shown by curve c in FIG. 4.

Therefore, by using a detection sensor with this structure, it is possible to accurately detect the concentration of pollution, and as a result, fresh water can be replenished in accordance with the concentration of pollution. It is possible to accurately detect a wide range of contaminant concentrations from low contaminant concentrations to high contaminant concentrations, and has the effect of automatically controlling the effective fresh water supply amount according to the degree of contamination.

[Summary of the idea]

As described above, in the present invention, the degree of contamination of the cleaning liquid in the cleaning liquid tank containing the cleaning liquid to be used for washing the fabric is detected by a sensor including a light emitter and a light receiver, and the contamination degree detection output from this sensor is used to detect the degree of contamination of the cleaning liquid in the cleaning liquid tank. A light shielding plate for adjusting the opening area of a light receiving window provided in a light receiver in a cleaning fluid contamination detection sensor that automatically adjusts the cleaning fluid in the cleaning fluid tank to a desired clear fluid by supplying additional clean fluid into the cleaning fluid tank. and a cleaning liquid contamination in a fabric washing tank, characterized in that a driving machine for moving the light shielding plate is provided, and the light receiving window is opened in stages upon detecting that the amount of light received by the light receiver is reduced. It is a degree detection sensor.

[Effect of idea]

Therefore, according to the detection sensor of this invention, it is possible to accurately detect a wide range of pollution concentrations from low pollution concentrations to high pollution concentrations, and the effective amount of fresh water replenishment can be automatically controlled according to the degree of pollution. There is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a fabric cleaning liquid tank equipped with a detection sensor according to the present invention, FIG. 2 is a cross-sectional diagram of only the detection sensor, and FIG. The explanatory diagram, FIG. 4, is a characteristic diagram showing the turbidity index and pollution concentration of wastewater. 1...Fabric, 2...Washing tank, 3...Guide roll, 4...Overflow port, 5...Drain port, 6
... Drain pipe, 7 ... Solenoid valve, 8 ... Valve, 9 ... Pollution level detection sensor, 10 ... Cylindrical body, 11 ... Light emitter, 12 ... Light receiver, 13 ... Through hole, 14 ... ... Light shielding plate, 15 ... Light projection case, 16 ... Light source, 1
7... Light emitting lens, 18... Transparent window, 19... Cold air supply port, 20... Exhaust port, 21... Condenser lens, 22... Transparent window, 23... Photoelectric conversion element, 2
4... Control circuit, 25... Seal material, 26... Light shielding plate. 27...Motor, 28...Drive gear.

Claims (1)

[Scope of utility model registration request] The degree of contamination of the cleaning liquid in the cleaning liquid tank containing the cleaning liquid to wash the fabric is detected by a sensor including a light emitter and a light receiver, and the cleaning liquid is additionally supplied to the cleaning liquid tank based on the contamination degree detection output from this sensor. In the cleaning liquid contamination level detection sensor that automatically adjusts the cleaning liquid in the cleaning liquid tank to a desired clear liquid, a light shielding plate for adjusting the opening area of the light receiving window provided in the light emitter and for moving the light shielding plate are provided. detecting that the amount of light received by the light receiver has been reduced,
A sensor for detecting the degree of contamination of a cleaning liquid in a fabric cleaning liquid tank, characterized in that the light receiving window is opened in stages.