JP3896782B2 - Residual chlorine meter - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a residual chlorine meter, which relates to a residual chlorine meter that reduces the number of parts and can be easily handled even when a defect occurs in an electrode.
[0002]
[Prior art]
Conventionally, as this type of technology, a configuration shown in a sectional view in FIG. 3 is known. In FIG. 3, an electrode 11 is embedded in the outer periphery of the lower portion of the indicator electrode 10, and a comparison electrode 50 is provided on the upper portion of the electrode 11. The upper portion of the indicator electrode 10 is fixed by a screw 15 to a base 14 supported by a support shaft 13 supported by a bearing 12 and fixed to the inner periphery in the middle of the cover 19.
[0003]
A plurality of through holes 19a are provided below the base 14 of the cover 19, and an upper lid 19c formed with a cable outlet 19b is fixed to the upper end in a watertight manner. 53 is a lead wire from the electrode 11 and the reference electrode 50 (counter electrode).
[0004]
An outer cylinder 17 having a plurality of slits 16 formed on the outer periphery of the indicator electrode 10 is fixed by screws 18, and a bead 20 made of ceramic, glass, or the like is provided between the outer cylinder 17 and the indicator electrode 10. It is put to the upper part. The beads 20 are held by a mesh holder 22 and a mesh 21 inserted inside the lower portion of the outer cylinder 17.
[0005]
The motor 25 and the speed reducer 26 supported by the lower support 37 and the upper support 24 are fixed on the base 14, and the outer magnet 28 is fixed to the magnet holder 27 attached to the shaft 26 a of the speed reducer 26. Has been. An inner magnet 29 is disposed inside the outer magnet 28 via a seal member 30, and a shaft 32 of the inner magnet 29 passes through a fixing member 33 provided on the base 14, A gear 35 and a gear 36 that meshes with the gear 35 are fixed.
[0006]
Reference numerals 40a, b, and c denote O-rings that function as seal members.
In the above configuration, the upper chamber A of the cover 19 is watertight, and the lower chamber B is filled with the liquid to be measured.
[0007]
In the residual chlorine meter having such a configuration, electric power is supplied to the motor 25 via a cable (not shown), and the shaft of the motor 25 rotates. This rotation is decelerated to an appropriate number of revolutions via the reduction gear 26, and the outer magnet 28 fixed to the inner periphery of the magnet holder 27 rotates. When the outer magnet 28 rotates, the inner magnet 29 rotates through the seal member 30, and the gear 35 to which the shaft 32 is fixed rotates.
[0008]
Then, the gear 36 meshing with the gear 35 rotates, and the outer cylinder 17 fixed below the gear 36 rotates. The liquid to be measured including the beads 20 is rotated by the rotation of the outer cylinder 17, and the electrodes 11 provided below the indicator electrode 10 are brought into contact with the beads to prevent contamination of the electrodes. The liquid to be measured is agitated by the rotation of the outer cylinder 17, 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 bead 20 is interposed between the mesh 21 and the slit 16. Since it is designed not to pass through, there is no fear of leaking from here.
[0009]
[Problems to be Solved by the Invention]
By the way, in such a conventional residual chlorine meter, since the rotation of the motor 25 is transmitted via the gears 35 and 36, the number of parts increases and it takes time to assemble. In addition, since the indicator electrode 10 and the comparison electrode 50 are integrally formed, the configuration is complicated, and there is a problem that, when a problem occurs in one of the poles, the lead wire of the other pole becomes an obstacle. .
[0010]
The present invention has been made to solve the above-described problems. It is an object of the present invention to reduce the number of parts and to realize a residual chlorine meter that can be easily dealt with even when a defect occurs in an electrode.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides, in claim 1,
A residual chlorine meter that immerses a rod-shaped indicator electrode and a comparative electrode in the liquid to be measured, applies a voltage between these electrodes, and measures the free effective chlorine concentration in the liquid to be measured based on the current flowing between the electrodes In the residual chlorine meter having a configuration in which an outer cylinder is provided on the outer periphery of the indicator electrode and the outer cylinder is rotated by a ring-shaped magnet, the axis of rotation of the ring-shaped magnet and the axis of the indicator electrode are aligned. It is characterized by having arranged.
[0012]
In claim 2, in the residual chlorine meter according to claim 1,
The outer cylinder is configured to rotate by an inner magnet fixed to the rotating shaft of the motor and an outer magnet disposed on the outer periphery of the inner magnet. The inner magnet is housed in a waterproof case and is in a watertight state with respect to the outer magnet. It is characterized by being.
[0013]
In claim 3, in the residual chlorine meter according to claim 1,
The lead wire from the indicator electrode is configured to be taken out from a gap between the inside of the waterproof case and the outer periphery of the inner magnet.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an example of an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of an indicator electrode 10 and inner and outer ring magnets of FIG. In FIG. 1, reference numeral 60 denotes a disk-shaped base having a predetermined thickness, and a lower end of a cylindrical upper case 61 is inserted into the upper outer periphery of the base and sealed by an O-ring 62 and fixed by a screw 63. ing.
[0015]
A motor 25 is fixed on the base 60 via a speed reducer 26. A through hole 60a is formed in the base 60 in the thickness direction, and the upper end of a reference electrode (counter electrode) 50 formed in a rod shape in the through hole 60a is inserted in a watertight manner through an O-ring 60b.
[0016]
Further, the upper end of a cylindrical lower case 64 is inserted into the outer periphery of the lower portion of the base 60 and fixed with screws 65. The lower case 64 is provided with a plurality of through holes 64a. The upper part of the upper case 61 is hermetically sealed with a lid 66 having a cable outlet 61a. Note that the indicator electrode lead wire 10a, the comparison electrode (counter electrode) lead wire 50a, a power supply line (not shown), and the like are taken out from the cable outlet 61a in a watertight manner.
[0017]
A magnet support fitting 69 is fixed to the other end of the shaft 68 connected at one end to the speed reducer 26. The inner side of the ring-shaped inner magnet 29 is fixed to the outer periphery of the magnet support bracket 69 by bonding or the like. The outer periphery of the inner magnet 29 has a waterproof case 71 having a concave cross section having a flange 71a at the upper end. Is arranged. The upper surface of the flange 71a is watertightly fixed to the lower surface of the base 60 through an O-ring 70b.
[0018]
A ring-shaped outer magnet 28 having an inner periphery slightly larger (several mm) than the outer periphery of the case is disposed on the outer periphery of the waterproof case 71, and the inner periphery of the magnet case 73 is fixed to the outer periphery of the outer magnet 28. Yes. A through hole 71a is formed in the center of the bottom of the waterproof case 71, and one end of a shaft 74 is inserted into the through hole 71a and hermetically sealed by an O-ring 70c.
[0019]
The upper end of the pipe 76 is connected to the lower portion of the shaft 74, and the indicator electrode 10 is formed at the lower end. A through hole 74 a is formed at the center of the pipe 76 and the shaft 74, and the pipe 75 is inserted into these through holes to fix the pipe 76 and the shaft 74.
[0020]
The lead wire 10 a of the indicator electrode 10 passes through the pipe 75 and is drawn out through the bottom of the waterproof case 71. The lead wire 10a is drawn into the upper case 61 through a gap between the inner magnet 29 and the waterproof case 71. In this embodiment, the lead wire 10a is a groove for easily passing the lead wire through the inner periphery of the waterproof case 71. 79 (see FIG. 2).
[0021]
An outer cylinder 17 is provided at the lower end of the magnet case 73 so as to cover the shaft 74, the pipe 76, and the indicator electrode 10. A bearing 77 is fixed between the outer periphery of the lower end of the waterproof case 71 and the inner periphery of the lower end of the magnet case 73, and a bearing 78 is fixed between the outer periphery of the shaft 74 and the inner periphery of the lower end of the magnet case 73.
[0022]
A predetermined amount of beads 20 are arranged in a space formed between the outer periphery of the indicator electrode 10 and the inner periphery of the outer cylinder 17, and the beads 20 are meshed with a mesh holder 22 provided at the lower part of the outer cylinder 17 and the mesh. 21 is supported. Although not shown in the figure, the outer cylinder 17 including the upper part of the bead 20 is formed with a plurality of slits having a width smaller than the outer diameter of the bead and perpendicular to the longitudinal direction.
[0023]
In the residual chlorine meter having such a configuration, electric power is supplied to the motor 25 via a cable (not shown), and the shaft of the motor 25 rotates. This rotation is decelerated to an appropriate number of rotations via the speed reducer 26, and the inner magnet 29 fixed to the inner periphery of the waterproof case 71 rotates. When the inner magnet 29 rotates, the outer magnet 28 rotates through the waterproof case 71, and the outer cylinder 17 fixed below the magnet case 73 rotates.
[0024]
The liquid to be measured including the beads 20 is rotated by the rotation of the outer cylinder 17 and the electrodes (not shown) provided below the indicator electrode 10 are brought into contact with the beads 20 to prevent the electrodes from being contaminated. The liquid to be measured is agitated by the rotation of the outer cylinder 17, 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 bead 20 is interposed between the mesh 21 and the slit 16. Since it is designed not to pass through, there is no fear of leaking from here.
[0025]
According to such a configuration, the motor 25 and the speed reducer 26 are disposed in the upper space A formed by the base 60 and the upper case 61, and for taking out signals from the indicator electrode 10 and the comparison electrode 50. Although there is a connection part for the lead wires 10a and 50a, this space A has a watertight structure and is designed to exchange electrical signals via a cable, so that this residual chlorine meter is immersed in the liquid to be measured. can do. As a result, real-time measurement corresponding to the depth of the liquid to be measured becomes possible, and fine management can be performed.
[0026]
It should be noted that the above description of the present invention is merely a specific preferred embodiment for the purpose of explanation and illustration. Accordingly, it will be apparent to those skilled in the art that the present invention can be modified and modified in many ways without departing from the essence thereof. The scope of the present invention defined by the description in the appended claims is intended to include modifications and variations within the scope.
[0027]
【The invention's effect】
As described above, according to the present invention,
In a residual chlorine meter configured to rotate the outer cylinder by providing an outer cylinder on the outer periphery of the indicator electrode, the rotating shaft of the motor that rotates the outer cylinder and the axis of the indicator electrode are aligned with each other. It is configured to rotate by an inner magnet fixed to the motor's rotating shaft and an outer magnet arranged on the outer periphery of the inner magnet. The inner magnet is housed in a waterproof case and is watertight with respect to the outer magnet. The wire was configured to be taken out from the gap between the inside of the waterproof case and the outer periphery of the inner magnet.
[0028]
As a result, no gear is required, the number of parts can be reduced, and the assembly time can be reduced. In addition, since the indicator electrode and the comparison electrode are separated from each other, when a problem occurs in one of the electrodes, the lead wire of the other electrode does not get in the way. Furthermore, since a residual chlorine meter can be immersed in the liquid to be measured, real-time measurement corresponding to the depth of the liquid to be measured is possible, and a residual chlorine meter that can be finely managed can be realized. did it.
[0029]
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of an embodiment of a residual chlorine meter according to the present invention.
FIG. 2 is an enlarged explanatory view of a main part of FIG.
FIG. 3 is a configuration diagram of a conventional residual chlorine meter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Indicator electrode 10a Indicator electrode lead wire 11 Electrode 17 Outer cylinder 20 Bead 21 Mesh 22 Mesh holder 25 Motor 26 Reduction gear 28 Outer magnet 29 Inner magnet 50 Reference electrode (counter electrode)
60 Base 61 Upper case 60b, 70b, 70c O-ring 63, 65 Screw 64 Lower case 66 Upper lid 68, 74 Shaft 69 Magnet support bracket 71 Waterproof case 73 Magnet case 75, 76 Pipe

Claims (3)

A residual chlorine meter that immerses a rod-shaped indicator electrode and a comparative electrode in the liquid to be measured, applies a voltage between these electrodes, and measures the free effective chlorine concentration in the liquid to be measured based on the current flowing between the electrodes In the residual chlorine meter having a configuration in which an outer cylinder is provided on the outer periphery of the indicator electrode and the outer cylinder is rotated by a ring-shaped magnet, the axis of rotation of the ring-shaped magnet and the axis of the indicator electrode are aligned. Residual chlorine meter, characterized in that The outer cylinder is configured to rotate by an inner magnet fixed to the rotating shaft of the motor and an outer magnet disposed on the outer periphery of the inner magnet. The inner magnet is housed in a waterproof case and is watertight with respect to the outer magnet. 2. The residual chlorine meter according to claim 1, wherein The residual chlorine meter according to claim 1 or 2, wherein a lead wire from the indicator electrode is configured to be taken out from a gap between an inner side of the waterproof case and an outer periphery of an inner magnet.

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