JP3465871B2 - Residual chlorine meter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual chlorine meter, and more particularly to a residual chlorine meter which is improved in reliability and downsized.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4 (constitutional diagram of a conventional residual chlorine meter), as a technique of this kind, an indicator electrode is contained in a liquid to be measured S introduced into a liquid tank (measuring tank) 4. (For example, a rotation indicator electrode having a structure in which an electrode Sp having a spot-type metal surface is attached to the tip of a rod-shaped cylinder made of epoxy, glass, etc.) 1 and a comparison electrode (counter electrode) 2 are immersed ( An applied voltage from a measurement circuit (residual chlorine measurement detection unit) 3 is applied between these electrodes (D is a drain). A residual chlorine meter is known in which the measuring circuit 3 measures the concentration of free available chlorine in the liquid to be measured based on the current flowing between the electrodes at this time.

The rotation indicator electrode 1 is provided in a bead (hereinafter referred to as "glass beads") G, which is made of, for example, ceramic or glass, which is placed in a liquid tank 4 for electrode cleaning, and is measured with rotation. Electrodes are continuously washed inside. FIG. 5 shows a main configuration of a brush 6 that comes into contact with a rotor 5 provided on the indicator electrode and extracts an electric signal from the indicator electrode.

[0004]

By the way, in such a conventional technique, since the indicator electrode and the counter electrode are arranged in the liquid tank 4, a pipe for introducing the measurement liquid into the liquid tank is required, There was a problem that real-time data could not be obtained due to the time delay for transporting the measurement liquid. Also,
Since the brush 6 comes into contact with the rotor 5 to take out an electric signal from the indicator electrode, there is a problem that contact failure may occur due to wear or intrusion of foreign matter. The present invention has been made to solve the above problems, and an object of the present invention is to realize a residual chlorine meter which does not require a liquid tank and is free from contact failure.

[0005]

Means for Solving the Problems In order to achieve the above object, according to the present invention, in claim 1, a rod-shaped indicator electrode (1) and a comparison electrode (2) are immersed in a liquid to be measured. In a residual chlorine meter that applies a voltage between equal electrodes and measures the concentration of free available chlorine in the measured liquid based on the current flowing between the electrodes,
A cylindrical cover with one end airtightly closed and the other end open
And it is provided inside the cover and is divided into an airtight chamber and an open chamber.
A partition plate is provided, and the rod-shaped indicator electrode is provided on the side of the open chamber.
A reference electrode is arranged and an outer cylinder is attached to the outer circumference of the indicator electrode.
Is provided, and the rotating means for rotating the outer cylinder is hermetically sealed.
It is characterized by being installed in the room . In the present invention, in the airtight chamber, a motor and a speed reducer that constitute a rotating means are arranged, and the indicator electrode and the comparison electrode are airtightly attached.
It is characterized in that an electric signal is transmitted and received via a cable. In claim 3, claim 1 or 2
In the residual chlorine meter described above, the inner diameter of the outer cylinder is formed to such an extent that a water flow is generated on the electrode surface of the indicator electrode by rotation. According to a fourth aspect, in the residual chlorine meter according to any one of the first to third aspects, beads are interposed between the indicator electrode including the indicator electrode and the outer cylinder. According to a fifth aspect, in the residual chlorine meter according to any one of the first to fourth aspects, the bottom of the indicator electrode is formed in a conical shape, and the electrode is embedded in the conical portion. In claim 6, claims 1 to 5
In the residual chlorine meter according to any one of 1 to 3, a throttle is provided on the inner circumference of the bottom of the outer cylinder, and a bottleneck is formed between the throttle and the cone of the bottom of the indicator electrode. Claim 7
In the residual chlorine meter according to claim 5 or 6, a second outer cylinder having a bottom plate at the bottom is provided on the outer circumference of the outer cylinder, and a through hole is provided near the center of the bottom plate. . According to an eighth aspect of the present invention, in the residual chlorine meter according to any one of the fifth to seventh aspects, a through hole is provided in the bottom of the second outer cylinder or near the outer periphery of the bottom plate. According to a ninth aspect, in the residual chlorine meter according to the first aspect, a hole is provided in the outer cylinder located above the electrode. In claim 10, claims 1 to 9
Residual chlorine analyzer according to any one of the cover is water
It is characterized in that it is formed so as to cover the outer cylinder to such an extent that the influence of the flow is alleviated .

[0006]

EXAMPLES Examples will be described with reference to the drawings.
In the following drawings, the same parts as those in FIG. 4 will be assigned the same reference numerals and explanations thereof will be omitted.

FIG. 1 is a diagram showing a concrete example of the residual chlorine meter according to claim 1 of the present invention, and FIG. 2 is a diagram showing a concrete example of the residual chlorine meter according to claim 4 of the present invention. 3 is a partially enlarged view of FIG. In FIG. 1, an electrode 11 is embedded in the outer periphery of the lower portion of the indicator electrode 10, and the upper portion of the indicator electrode is supported by a support shaft 13 supported by a bearing 12 and fixed to the middle inner periphery of the cover 19. It is fixed to the formed base 14 with screws 15. A plurality of through holes 19a are provided below the base 14 of the cover 19, and an upper lid 19c having a cable outlet 19b is watertightly fixed to the upper end thereof.

A plurality of slits 16 are formed on the outer circumference of the indicator electrode 10.
An outer cylinder 17 in which is formed is fixed by a screw 18, and a bead 20 made of ceramic, glass or the like is inserted between the outer cylinder 17 and the indicator electrode 10 to a position above the electrode 11. The beads 20 are held by a mesh holder 22 and a mesh 21 inserted inside the lower part of the outer cylinder 17.

A motor 25 supported by a lower support 37 and an upper support 24 and a reducer 26 are fixed on the base 14, and an outer magnet is attached to a magnet holder 27 attached to the shaft of the reducer 26. It is fixed. An inner magnet 29 is arranged inside the outer magnet 28 via a seal member 30, and a shaft 32 of the inner magnet 29 penetrates a fixing member 33 provided on the base 14, and an end portion thereof is provided. The gear 35 and the gear 36 that meshes with the gear 35 are fixed.

Reference numerals 40a, b, and c are O-rings that function as seal members. Although not shown in the figure, electrical wiring from the cable outlet 19b to the motor 25 and the indicator electrode 1
The cable for taking out the signal wiring 1 is attached airtightly. A counter electrode (not shown) for forming a residual chlorine meter is fixed to the base 14. According to the above configuration, the upper chamber A of the cover is watertight and the lower chamber B is filled with the liquid to be measured.

In the residual chlorine meter having such a structure, electric power is supplied to the motor 25 via a cable (not shown) to rotate the shaft of the motor. This rotation is reduced to an appropriate number of rotations via the speed reducer 26, and the outer magnet 28 fixed to the inner circumference of the magnet holder 27 rotates. When the outer magnet 28 rotates, the inner magnet 29 rotates via the seal member 30, and the shaft 32 to which the gear 35 is fixed rotates.

The gear 36 meshing with the gear 35 rotates, and the outer cylinder 17 fixed below the gear 36 rotates.
Due to the rotation of the outer cylinder 17, the solution to be measured including the beads 20 rotates, and the electrodes 11 provided below the indicator electrode come into contact with the beads to prevent the electrodes from being soiled. The liquid to be measured is stirred by the rotation of the outer cylinder, and the liquid to be measured is replaced with the liquid to be measured between the outer cylinder 17 and the indicator electrode 10, but the beads do not pass through between the mesh 21 and the slit 16. It has been designed so that there is no risk of spillage from here.

In the embodiment, the outer cylinder 17 and the indicator electrode 10 are
Although the beads are interposed between the beads, the beads may be omitted as long as the liquid does not stain the electrodes even when used for a long time with the measurement liquid. According to the above configuration, since the outer cylinder 17 is rotated to remove the dirt adhering to the electrodes, it is possible to realize a residual chlorine meter in which there is no fear of contact failure due to wear or intrusion of foreign matter as in the conventional case. You can

Further, according to such a configuration, the cover 19
In the upper space A partitioned by the base 14 arranged in the middle, there are a motor and a speed reducer and there is a connection part for the signal extraction part from the indicator pole and the comparison pole, but this space is a watertight structure. Since the electric signal is transmitted and received via the cable, the residual chlorine meter can be immersed in the liquid to be measured. As a result, it becomes possible to perform measurement corresponding to the depth of the liquid to be measured, and fine control can be performed.

FIG. 2 shows another embodiment. In this example, the point different from FIG. 1 is that the bottom of the indicator electrode 10a is formed in a conical shape, and the electrode 11a is arranged in this conical portion 53. A throttle is provided on the inner circumference of the bottom of the outer cylinder 17a, and a bottleneck 54 (see FIG. 3) is formed between the throttle 17b and the conical portion 53 of the bottom of the indicator electrode 10a. Second with fifty
The outer cylinder 51 is provided, and the through hole 52 and the bottom hole 55 are provided near the center of the bottom plate 50.

In the above construction, when the outer cylinder 17a rotates, the liquid to be measured is sucked upward through the through hole 52 and the bottom hole 55 by the throttle 17b provided on the inner circumference of the bottom of the outer cylinder 17a. Due to this suction, the beads 20 placed on the bottom plate 50 move upward through the bottleneck 54 as shown by the arrow, and pass through the through hole 17c provided in the outer cylinder 17 to the outer cylinder 17a.
To the outer periphery and the inside of the second outer cylinder 51.

The beads 20 repeat this operation while the outer cylinder 17a rotates, and the beads 20 passing through the bottleneck 54 collide with the electrode 11a formed at the bottom of the indicator electrode 10a. Also in the above configuration, since the outer cylinder 17 is rotated to remove the dirt adhering to the electrodes, it is possible to realize a residual chlorine meter in which there is no fear of contact failure due to wear or intrusion of foreign matter as in the conventional case. it can. Further, since the measurement liquid is caused to flow by the rotation of the outer cylinder 17a, there is no possibility that dirt is attached to the electrode 11a. In this embodiment also, the base 14
A counter electrode (not shown) for constructing the residual chlorine meter is fixed to.

[0018]

As described above, according to the present invention, in claim 1, a rod-shaped indicator electrode and a reference electrode are provided in the liquid to be measured.
And soak, apply a voltage between these electrodes, and
The free effective chlorine concentration in the measured solution
In the residual chlorine meter to be measured, one end is airtightly blocked and the other
A cylindrical cover with an open end and a cover inside the cover.
A partition plate that separates the airtight chamber and open chamber
When the rod-shaped indicator electrode and the reference electrode are arranged on the discharge chamber side,
In addition, an outer cylinder is provided on the outer circumference of the indicator electrode, and this outer cylinder is rotated.
Rotating means for rotating the airtight chamber was provided in the airtight chamber. In the second aspect of the present invention, the airtight chamber has a motor that constitutes a rotating means,
The indicator pole and the comparison pole are hermetically
The electric signal is sent and received via the attached cable.
I'm sorry. As a result, the residual chlorine meter is immersed in the liquid to be measured.
It is possible to measure according to the depth of the liquid to be measured.
It is possible to perform detailed management. Also rotation
Contact failure due to wear or foreign matter entering between the child and brush
There is no fear.

In the third aspect, since the inner diameter of the outer cylinder is formed to the extent that a water flow is generated on the electrode surface of the indicator electrode by rotation, it is possible to prevent dirt from adhering to the electrode. According to the fourth aspect, the beads are interposed between the indicator electrode including the electrode of the indicator electrode and the outer cylinder, so that the dirt can be effectively prevented from adhering to the electrode.

In the fifth and sixth aspects, the bottom of the indicator electrode is formed in a conical shape, and an electrode is arranged in this cone to provide a diaphragm on the inner circumference of the bottom of the outer cylinder. Since a bottleneck is formed between the bottom and the conical portion, it is possible to more effectively prevent dirt from adhering to the electrode. In claim 7, a second outer cylinder having a bottom plate at the bottom is provided on the outer circumference of the outer cylinder, and a through hole is provided near the center of the bottom plate, and the bottom of the second outer cylinder or near the outer circumference of the bottom plate is claimed in claim 8. Since the through-hole is provided in the outer cylinder and the hole is provided in the outer cylinder located above the electrode in claim 9, the liquid to be measured can be effectively circulated. According to the tenth aspect, since the cover is provided on the outer circumference of the outer cylinder, the influence of the water flow can be mitigated.

[0021]

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an embodiment of a residual chlorine meter according to claim 1 of the present invention.

FIG. 2 is a diagram showing an example of an embodiment of the residual chlorine meter according to claim 4 of the present invention.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a configuration diagram of a conventional residual chlorine meter.

FIG. 5 is a diagram for explaining a conventional technique.

[Explanation of symbols]

10 Indicator pole (rotation indicator pole) 11 electrodes 12 bearings 13 Support shaft 14 base 15 screws 16 slits 17 outer cylinder 18 screws 19 cover 20 beads 21 mesh 22 mesh holder 24 Upper support 25 motor 26 reducer 27 Magnet holder 28 outer magnet 29 inner magnet 30 Seal member 33 fixing member 35 gears 36 gears 37 Lower support

Front Page Continuation (72) Inventor Takuya Tasaki 1-12-1, Migataoka, Aoba-ku, Yokohama-shi, Kanagawa (72) Inventor Taku Kanami 29-3, Takatsudo-cho, Midori-ku, Chiba Prefecture 611 Sunvale Chiba 611 (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. (72) Inventor Hideki Matsumoto Yokogawa Electric Co., Ltd. 2-932 Nakamachi, Musashino-shi, Tokyo (72) Inventor Noriko Tsuchida 2-3-9 Nakamachi, Musashino-shi, Tokyo Yokogawa Electric Co., Ltd. (56) References JP 62 -288559 (JP, A) Actual development 3-23356 (JP, U) Actual development Sho 63-129861 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 27/26- 27/49 G01N 33/18

Claims (10)

(57) [Claims] 1. A bar-shaped indicator electrode and a reference electrode are immersed in a solution to be measured, a voltage is applied between these electrodes, and the concentration of free available chlorine in the solution to be measured is determined based on the current flowing between the electrodes. In the residual chlorine meter to measure, a cylindrical cover with one end airtightly closed and the other end open
And it is provided inside the cover and is divided into an airtight chamber and an open chamber.
A partition plate is provided, and the rod-shaped indicator electrode is provided on the side of the open chamber.
A reference electrode is placed and an outer cylinder is attached to the outer circumference of the indicator electrode
Is provided, and the rotating means for rotating the outer cylinder is hermetically sealed.
A residual chlorine meter characterized by being installed in the room . 2. A motor constituting the rotation means to said airtight chamber, a comparison electrode and instruction pole with reduction gear is disposed, gas
The residual chlorine meter according to claim 1, wherein an electric signal is transmitted and received through a cable which is closely attached . 3. The residual chlorine meter according to claim 1, wherein the inner diameter of the outer cylinder is formed so as to generate a water flow on the electrode surface of the indicator electrode by rotation. 4. A bead is interposed between an indicator electrode including the electrode of the indicator electrode and an outer cylinder.
The residual chlorine meter according to any one of the above. 5. The residual chlorine meter according to any one of claims 1 to 4, wherein a bottom portion of the indicator electrode is formed in a conical shape, and an electrode is arranged in the conical portion. 6. A throttle is provided on the inner circumference of the bottom of the outer cylinder, and a bottleneck is formed between the throttle and the conical portion of the bottom of the indicator electrode. Residual chlorine meter described in. 7. A second plate having a bottom plate on the bottom of the outer circumference of the outer cylinder.
The residual chlorine meter according to any one of claims 5 to 7, wherein an outer cylinder is provided and a through hole is provided near the center of the bottom plate. 8. A through hole is provided in the bottom of the second outer cylinder or in the vicinity of the outer periphery of the bottom plate.
Residual chlorine meter described. 9. The residual chlorine meter according to claim 4, wherein a hole is formed in an outer cylinder located above the electrode. 10. The degree to which the cover reduces the influence of water flow
The residual chlorine meter according to any one of claims 1 to 9, wherein the residual chlorine meter is formed so as to cover the outer cylinder .