JPH0418718Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention is a cleaning method for cleaning the detection surface of a turbidity meter, etc. used in sample water such as a sewage treatment plant where there are many foreign substances, sticky substances, and precipitates. It is related to the device.

B. Summary of the invention The present invention is a brush-type cleaning device that reciprocates a cleaning brush in a certain angle range around a rotating shaft. By supplying air to the air chamber and ejecting it as bubbles from the air hole, the dirt on the brush itself is removed with the bubbles, and
The flow generated by the rise of air bubbles moves dirt away from the surface to be cleaned, contributing to highly accurate and accurate measurements.

C. Prior Art Configuration examples of an immersion turbidity meter are shown in FIGS. 7 to 9. The tip (lower end) of the detection unit 1 includes a light emitting element,
It has a built-in light receiving element, emits light from the detection surface 1A on the end face into the water in the water test tank P, receives light scattered by suspended matter, and generates an electrical signal according to the amount (turbidity) of the light. . This detection unit 1 is supported by a mounting base 2 and connected to a converter 4 via a detection signal line 3. In this converter 4, the signal corresponding to the amount of received light is converted into a turbidity output and becomes an output signal.

This type of turbidity meter is equipped with a cleaning device 5 because detection accuracy will decrease if pollutants (sticky substances, precipitates) or microorganisms in the sample water adhere to the detection surface 1A. The cleaning device 5 generally has a configuration in which one end of a cleaning brush 5B is fixed to a rotating shaft 5A, and a brush driving section 5C is connected to the converter 4 via a cleaning cable 6. 5
C is in the operating state, the cleaning brush 5B is reciprocated in a predetermined angle range around the shaft 5A, and the detection surface 1A is cleaned by brushing. The cleaning brush 5B is normally located away from the detection surface 1A as shown in FIG.

D. Problems to be solved by the invention When a turbidity meter equipped with such a brush-type cleaning device 5 is used in a sample water with a lot of foreign matter, stickiness, and precipitates, such as in a sewage treatment plant, the following problems occur. This sometimes caused problems.

() Sticky matter in the sample water adheres not only to the detection surface 1A but also to the brush 5B. As a result, the effect of the brush sig becomes weaker, or even the brush 5B
This may result in dirt being rubbed onto the detection surface.

() Contaminants in the sample water, especially fibrous debris (for example, hair), get entangled with the brush 5B, weakening the cleaning effect.

() When there is little flow in the test water, the pollutants removed from the detection surface 1A by brushing float near the detection surface 1A, affecting the turbidity measurement after cleaning.

E. Means for Solving Problems The present invention provides a cleaning device in which a cleaning brush is reciprocated in a required angle range around a rotating shaft by a drive mechanism to brush a surface to be cleaned. In addition to providing an air chamber on the back of the
An air hole is formed between the flocks, and air is supplied to the air chamber from an air pump connected to the air inlet through an air flow path.

F Effect When power is supplied from the converter to the brush drive unit and the air pump during cleaning, the cleaning brush starts reciprocating in a predetermined angular range and air supply to the air chamber. Air is blown out of the room as bubbles from the air holes, and dirt is removed from the brush itself. This dirt, together with the dirt separated from the surface to be cleaned, is moved away from the surface to be cleaned by the flow generated as the bubbles rise, and the measurement is performed accurately and with high precision.

G. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, the same parts as in FIGS. 7 to 9 are designated by the same reference numerals, and the explanation thereof will be omitted.

Figures 1 to 4 show an embodiment of the present invention, in which it is attached to an immersion type turbidity meter, in which an air chamber 12 is integrally provided on the back of the bristle part of the brush handle 11. , air holes 14 are formed between the flocks 13. The handle 11 is fixed to a rotating shaft 15. This shaft 15 is inserted into a support tube 16, an air pipe 17 is attached to the support tube 16, and a flexible tube (air tube) 18 is connected between the tip of the air pipe 17 and the inlet 12A of the air chamber 12. ing.

Reference numeral 1 indicates a detection section of the turbidity meter, 1A indicates a detection surface, and the handle 11 is driven by a brush drive section 19 so as to reciprocate within a predetermined angle range about a shaft 15. That is,
A brush drive section 19 is installed at the upper end of the support tube 16 and connected to the rotating shaft 15. Also, air pipe 1
7 is connected to an air pump 20.

The detection unit 1 is supported by a mounting base 2 and is connected to a converter 4 via a detection signal line 3. The converter 4 and the brush driving section 19 are connected by a cleaning cable 21A, and the converter 4 and the air pump 20 are connected by a cleaning cable 21B. By connecting these cables 21A and 21B, power is simultaneously supplied to the brush drive unit 19 and the air pump 20 at the set cleaning time to perform cleaning.

Next, the operation will be described. When power is supplied from the converter 4 to the brush drive unit 19 and the air pump 20, the brush drive unit 19 operates and rotates the rotating shaft 15.
forward rotation and reverse rotation are repeated. In other words, the brush handle 11 reciprocates around the shaft 15 within a predetermined angle range,
The detection surface 1A is brushed by the tips of the hair.

In this case, air is supplied from the air pump 20 to the air chamber 12 via the air pipe 17 and the flexible tube 18. This air is discharged to the outside through the air holes 14 and rises along the bristles 13 in the form of bubbles. At this time, the air bubbles generate turbulent flow in a place very close to the flocked hair 13, and the dirt adhering to the flocked hair 13 is peeled off. Thereafter, the bubble hits the detection surface 1A and rises along the obliquely arranged detection surface as shown in FIG. As a result, a flow is created on the surface of the detection surface 1A, and the dirt flows to a position away from the detection surface 1A. As a result, there is no effect on the sample water during measurement after the cleaning has stopped, and the detection surface 1A
In combination with improved accuracy through cleaning, turbidity measurements become more accurate.

Next, another embodiment of the present invention will be described with reference to FIGS. 5 and 6. In FIGS. 5 and 6, the same parts as in FIGS. 1 to 4 are designated by the same reference numerals, and explanations thereof will be omitted. In FIG. 5, an intermediate tank 22 is provided between the air pipe 17 and the flexible air tube 18, a branch is provided in the air pipe 17 near the air pump 20 outlet, and a solenoid valve 23 is inserted into this branch pipe. It is controlled by a command from the converter 4 so that it is in a closed state during cleaning and in an open state at other times.

With such a configuration, the brush drive unit 19 and the air pump 2 are operated during periods other than cleaning (during measurement).
0 is in a stopped state, and the solenoid valve 23 is in an open state. Therefore, the sample water enters the air chamber 12 through the air hole 14 and passes through the flexible tube (air tube) 1.
8. It enters the intermediate tank 22 and the part of the air pipe 17 below the water surface.

In this state, when the cleaning time comes and power is supplied to the drive unit 19 and the air pump 20, the reciprocating movement of the brush and the supply of air are started, and the solenoid valve 23 is closed. Then, the air from the air pump 20 presses the test water in the intermediate tank 22 and the like, and the water is jetted from the air hole 14 to the outside of the air chamber. This water jet peels off and removes dirt from the brush and detection surface 1A. After all the water inside is drained, cleaning is performed using air bubbles as in the previous embodiment.

As shown in FIG. 6, protrusions 24 are formed between the bristles of the bristles of the brush, and holes 25 communicating with the air holes 14 are formed in the bristles 13 (that is, a line perpendicular to the detection surface 1A). On the other hand, if the brush is formed at a predetermined angle, the brush itself can be effectively cleaned (removal of dirt, entangled hair, etc.) by the water jet and air bubbles. Furthermore, although each of the above embodiments is a case in which the present invention is attached to a light emission type turbidity meter, it is also applicable to a light transmission type turbidity meter or other water quality measuring instruments.

H. Effects of the invention As described above, according to the invention, an air chamber is provided on the back side of the bristle part of the cleaning brush, and air holes are formed between the bristle parts to eliminate air bubbles by supplying air during cleaning. This allows the dirt on the brush itself to be removed by the bubbles, and the flow generated as the bubbles rise can move the dirt away from the detection surface, contributing to high precision and accurate measurements. . Further, by providing an intermediate tank and a solenoid valve in the air supply path, a water jet can be easily obtained, and a high cleaning effect can be expected.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram showing one embodiment of the cleaning device according to the present invention (when attached to an immersion turbidity meter);
The figure is an enlarged partial sectional view of the cleaning brush portion of the same embodiment, FIG. 3 is a plan view of the same cleaning brush portion, and FIG.
5 is a conceptual diagram showing another embodiment of the present invention, FIG. 6 is a sectional view showing another structural example of the cleaning brush portion, and FIG. 7 is a conventional brush. A conceptual diagram showing the configuration of a turbidity meter equipped with a type washer. Figure 8 is an enlarged view of the vicinity of the detection surface of a conventional turbidity meter. Figure 9 is an explanatory diagram of the vicinity of the detection surface of a conventional turbidity meter. be. 1...Detection part of turbidity meter, 1A...Detection surface, 4...
...Converter, 11...Cleaning brush handle, 12...Air chamber, 13...Flocking, 14...Air hole, 15...
Rotating shaft, 17... Air pipe, 18... Flexible tube, 19... Brush drive unit, 20...
Air pump, 22... intermediate tank, 23... solenoid valve.

Claims (1)

[Scope of utility model registration request] In a cleaning device that brushes a surface to be cleaned by reciprocating a cleaning brush around a rotating shaft in a required angle range by a drive mechanism, an air chamber is provided on the back of the bristle part of the cleaning brush, and an air chamber is provided between the bristle grafts. A cleaning device characterized in that an air hole is formed, and air is supplied to the air chamber from an air pump connected to the air inlet through an air flow passage.