JP2003302367A - Electrode-cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode-cleaning apparatus that can simplify a configuration, can reduce costs, can be miniaturized, can be made inexpensive, and has improved maintenance properties. <P>SOLUTION: The electrode-cleaning apparatus for cleaning an electrode in a measurement channel comprises: the measurement channel that is provided in a perpendicular direction while measurement fluid flows from an upper direction to a lower one; a nozzle that is provided in the middle of the measurement channel for injecting the measurement fluid from the lower portion of the measurement channel to the upper direction; a measurement electrode that is provided at the measurement channel while the electrode surface is arranged opposite to the injection orifice of the nozzle; and a plurality of beads that are provided between the injection orifice of the nozzle and the electrode surface of the measurement electrode and come into contact with the electrode surface of the measurement electrode due to the injection of the measurement fluid from the nozzle for washing the electrode surface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode cleaning device having a simple structure, cost reduction, small size and low cost, and improved maintainability.

[0002]

2. Description of the Related Art FIG. 2 is a structural explanatory view of a conventional example which has been generally used, showing an example used in a residual chlorine meter.

As shown in FIG. 2, a conventional residual chlorine meter 101 has an inlet 102a into which a measurement fluid flows and an outlet (not shown) through which the measurement fluid overflows and is discharged. Fluid storage chamber (cell) 10 for storing measurement fluid
2, a gold electrode main body (indicating electrode) 103 that comes into contact with the measurement fluid in the fluid storage chamber 102, and the gold electrode main body 103
And a rod-shaped rotary electrode 104 made of glass epoxy resin or the like and housed in the fluid housing chamber 102.
Beads 105 made of ceramics or glass.

Further, a counter electrode (reference electrode) 106 in contact with the fluid in the fluid storage chamber 102, a rotary shaft 107 for rotating the rotary electrode 104, and a motor 108 for generating a driving force for driving the rotary shaft 107. And a drive mechanism section 109 constituted by a gear, a belt, a pulley and the like for transmitting the driving force of the motor 108 to the rotating shaft 107.

A bearing 110 for rotatably connecting and supporting the rotating electrode 104 and the rotating shaft 107, and a capacitor forming a part of an electric circuit for applying a voltage between the gold electrode body 103 and the counter electrode 106. 111 and the like are provided.

In the conventional residual chlorine meter 101, the motor 10
8, the rotating electrode 104 is forcibly rotated to form a water flow in the fluid storage chamber 102, and the gold electrode body 1
A voltage was applied between the electrode 03 and the counter electrode 104 to measure the current value flowing between these electrodes, and the residual chlorine concentration in this fluid was measured.

Further, in the conventional residual chlorine meter 101, the rotating electrode 104 is forcibly rotated to bring the gold electrode body 103 into contact with the beads 105 to clean the surface of the gold electrode body 103 on which water stains and the like adhere. .

[0008]

[Problems to be Solved by the Invention] Conventional residual chlorine meter 10
1 requires a large number of rotary mechanism parts such as the rotary shaft 107 that drives the rotary electrode 104, the motor 108, the drive mechanism part 109, and the bearing 110, so that the product becomes large and a complicated mechanical design is required. There was a problem that the product became expensive.

Further, in the conventional residual chlorine meter 101, since the product is continuously operated, the life of the rotating mechanism parts such as the motor 108 is shortened, and the parts necessary for exchanging these rotating mechanism parts are reduced. There was a problem of being expensive.

An object of the present invention is to solve the above-mentioned problems. The present invention provides an electrode cleaning apparatus having a simple structure, cost reduction, small size and low cost, and improved maintainability. To do.

[0011]

In order to achieve such an object, according to the present invention, in the electrode cleaning device according to claim 1, the electrode cleaning device for cleaning the electrode in the measurement channel is provided with a vertical direction. A measurement channel provided with a measurement fluid flowing upward from below, a nozzle provided in the middle of the measurement channel for ejecting the measurement fluid upward from below the measurement channel, and a nozzle provided in the measurement channel A measurement electrode whose electrode surface is arranged so as to face the ejection port of the nozzle, and an electrode of the measurement electrode which is provided between the ejection port of the nozzle and the electrode surface of the measurement electrode by ejecting the measurement fluid from the nozzle. A plurality of beads contacting the surface and cleaning the electrode surface.

The electrode cleaning apparatus according to a second aspect of the present invention is characterized by comprising a horizontal nozzle that is provided orthogonal to the measurement flow path and that jets the measurement fluid in the surface direction on the electrode surface of the measurement electrode. The electrode cleaning device according to claim 1.

In the electrode cleaning apparatus according to the first or second aspect of the present invention, the injection port portion of the nozzle of the flow path has a funnel shape.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory view of the main configuration of an embodiment of the present invention, showing an example used in a residual chlorine meter. In the figure, the same symbols as those in FIG. 2 indicate the same functions. Only parts different from FIG. 2 will be described below.

In the figure, 1 is a main block of the residual chlorine meter. Reference numeral 2 denotes a measurement flow path which is provided in the main body block 1 in the vertical direction and through which the measurement fluid flows from below to above.

Reference numeral 3 denotes a nozzle which is provided in the middle of the measurement flow path 2 and injects the measurement fluid FL from below the measurement flow path 2 to above. Reference numeral 4 denotes a measurement electrode which is provided in the measurement flow path 2 and whose electrode surface 41 faces the ejection port 31 of the nozzle.

The reference numeral 5 is provided between the injection port 31 of the nozzle and the electrode surface 41 of the measuring electrode, and the measuring fluid F from the nozzle 4 is supplied.
These are a plurality of beads that are brought into contact with the electrode surface 41 of the measurement electrode to wash the electrode surface by jetting L.

Reference numeral 6 is a counter electrode (reference electrode) provided on the main body block 1 so as to face the measurement flow path 2. In this case, the portion 21 where the injection port 31 of the nozzle of the flow path 2 is arranged
However, it has a funnel shape. 7 is a lead wire and 8 is an O-ring.

In the above structure, the measurement fluid FL flows in from below the measurement flow path 2, and the ejection of the measurement fluid FL from the injection port 31 of the nozzle causes the beads 5 below the measurement electrode 4 to flow.

After the beads 5 have collided with the measurement electrode 4, they return to the injection port 31 of the nozzle and again move to the operation of being ejected by the measurement fluid FL, and the above-mentioned movement is repeated. By these operations, the beads 5 constantly collide with the surface of the electrode surface 41 to wash the surface of the electrode surface 41.

As a result of an experiment conducted by the present inventor, the indicated values were compared, and it was confirmed that the apparatus of the present invention had an effective cleaning effect. A clear cleaning result is confirmed in comparison with the conventional prototype without a cleaning element, which had been instructed in one or two days.

As a result, (1) a mechanical drive mechanism for forcibly cleaning the electrode surface is not required, so that an electrode cleaning device which can significantly reduce the cost in the commercialization can be obtained. Moreover, maintenance and the like becomes very easy.

(2) An electrode cleaning device having a simplified structure, cost reduction and size reduction, and very easy maintenance can be obtained.

(3) Since the number of parts can be reduced and the weight can be reduced, an electrode cleaning device that can contribute to global environment design can be obtained as compared with conventional products.

(4) If the nozzle outlet portion 31 of the flow path 2 is formed in a funnel shape, the beads 5 quickly gather at the nozzle outlet portion 31 and the electrode for further cleaning the electrode surface 41 is further improved. A cleaning device is obtained.

FIG. 2 is an explanatory view of the essential structure of another embodiment of the present invention. In the present embodiment, 11 is a horizontal nozzle that is provided orthogonal to the measurement flow path 2 and that jets the measurement fluid FL in the surface direction onto the electrode surface 41 of the measurement electrode 4.

As a result, since the horizontal nozzle 11 is provided, the beads 5 can be encouraged to rotate more actively on the electrode surface of the measuring electrode 4, so that the efficiency of cleaning the electrode surface 41 is further improved. A further improved electrode cleaning device can be obtained.

In the above-mentioned embodiment, it has been described that the portion 21 of the flow path 2 where the injection port 31 of the nozzle is arranged has a funnel shape, but the present invention is not limited to this. For example, it may have a flat bottom surface. In short, the bead 5 can contact the electrode surface 41 of the measurement electrode 4 and wash the electrode surface 41 by the ejection of the measurement fluid FL from the ejection port 31 of the nozzle. I wish I had it.

Further, the present invention can be applied not only to the residual chlorine meter but also to an apparatus having an electrode having a flat surface and a structure in which a measuring fluid or the like flows at a constant flow velocity around the electrode. Of course.

The above description merely shows specific preferred embodiments for the purpose of explaining and exemplifying the present invention. Therefore, the present invention is not limited to the above-mentioned embodiment, and many modifications are made without departing from the essence thereof.
It also includes deformation.

[0031]

As described above, according to the first aspect of the present invention.
According to the above, there are the following effects. In an electrode cleaning device that cleans the electrodes in the measurement channel, a measurement channel that is provided in the vertical direction and through which the measurement fluid flows from below is provided, and a measurement channel that is provided in the middle of this measurement channel is provided above that below the measurement channel. Between the nozzle that ejects the measurement fluid, the measurement electrode that is provided in the measurement flow path and has the electrode surface facing the ejection port of the nozzle, and between the ejection port of the nozzle and the electrode surface of the measurement electrode. And a plurality of beads for cleaning the electrode surface of the measuring electrode by contacting the electrode surface of the measuring electrode by jetting the measuring fluid from the nozzle.

As a result, (1) a mechanical drive mechanism for forcibly cleaning the electrode surface is no longer required, so that an electrode cleaning apparatus which can significantly reduce the cost in commercialization can be obtained. Maintenance is very easy.

(2) An electrode cleaning apparatus having a simplified structure, cost reduction and size reduction, and very easy maintenance can be obtained.

(3) Since the number of parts can be reduced and the weight can be reduced, an electrode cleaning device that can contribute to global environment design can be obtained as compared with conventional products.

According to the second aspect of the present invention, there are the following effects. Since the horizontal nozzle is provided, the beads can be urged to rotate more actively on the electrode surface of the measurement electrode, so that the electrode cleaning device with further improved efficiency of cleaning the electrode surface can be obtained. .

According to claim 3 of the present invention, the following effects can be obtained. Since the ejection port of the nozzle of the flow path is shaped like a funnel, beads are quickly collected at the ejection port of the nozzle, and an electrode cleaning device with further improved efficiency of cleaning the electrode surface can be obtained.

Therefore, according to the present invention, it is possible to realize an electrode cleaning device having a simple structure, cost reduction, small size and low cost, and improved maintainability.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part configuration of another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a main part configuration of a conventional example that is generally used in the past.

[Explanation of symbols]

1 body block 2 measurement channels 21 Portion of the flow path 2 in which the injection port 31 of the nozzle is arranged 3 nozzles 31 Nozzle injection port 4 measuring electrodes 41 Electrode surface of measuring electrode 5 beads 6 Reference electrode 11 horizontal nozzles FL measuring fluid

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeshi Ueda             2-9-32 Nakamachi, Musashino City, Tokyo Yokogawa             Electric Co., Ltd. (72) Inventor Takashi Kitamoto             2-9-32 Nakamachi, Musashino City, Tokyo Yokogawa             Electric Co., Ltd.

Claims (3)

[Claims] 1. An electrode cleaning apparatus for cleaning an electrode in a measurement flow path, wherein a measurement flow path is provided in a vertical direction and a measurement fluid flows upward from below, and a measurement flow path provided in the middle of this measurement flow path. A nozzle that ejects the measurement fluid in an upward direction from below, a measurement electrode that is provided in the measurement flow path and has an electrode surface facing the ejection port of the nozzle, and the ejection port of the nozzle and the measurement electrode An electrode cleaning apparatus, comprising: a plurality of beads provided between the electrode surface and the electrode surface of the measurement electrode to wash the electrode surface by jetting a measurement fluid from the nozzle. 2. The electrode cleaning apparatus according to claim 1, further comprising a horizontal nozzle that is provided orthogonal to the measurement flow path and that sprays the measurement fluid in a surface direction on an electrode surface of the measurement electrode. 3. The injection port portion of the nozzle of the flow path has a funnel shape.
The electrode cleaning device described.