JP3114112U - Optical water quality meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a watertight rotating bearing and not provide a rotating arm in a water tank.
A configuration in which light from a light emitting unit 3 is projected into a water tank through a transparent window 8 of a water tank 2 that contains water to be measured, and light emitted through another transparent window 8 is received by a light receiving unit 4. In the optical water quality meter, the wiper 11 provided on each transparent window and movable along the inner surface of the transparent window, the inner permanent magnet 12 attached to the rear surface of the wiper, and the inner permanent magnet are attracted from the outside of the water tank. The outer permanent magnet 13 is provided so as to be movable substantially parallel to the inner surface of the transparent window while the wiper is pressed against the inner surface of the transparent window. A reciprocating drive unit 14 for reciprocally driving the outer permanent magnet along a predetermined movement path parallel to the inner surface of the corresponding transparent window is provided outside the water tank.
[Selection] Figure 1

Description

  The present invention relates to a water quality meter such as a turbidimeter and a color meter, and more particularly to a device having a cleaning device for a transparent window used at the time of water quality measurement.

  A conventional technique of this type is shown in FIG. The outline is that the water tank 31 has transparent glass windows 35 on both end walls 33 and 34 of the cylindrical main body 32, and has an inlet 36 and an outlet 37 of water to be measured on the main body 32, and the glass window In this configuration, a wiper device 38 for cleaning the inner surface of 35 is provided. The wiper device 38 includes a wiper 39 in contact with the inner surface of the window glass 35, a rotating arm 40 attached to the tip of the wiper 39, and a motor 41 provided outside the water tank 31 so as to drive the rotating arm 40. And a reciprocating rotation drive unit 43 that is coupled to the rotation arm 40 through the end walls 33 and 34. A watertight rotary bearing 44 is provided in the penetrating portion of the shaft 42. In the figure, 45 is a light emitting element constituting the measuring apparatus, and 46 is a light receiving element corresponding thereto. In this configuration, when the motor 41 reciprocally rotates, the rotating arm 40 rotates, so that the wiper 39 rotates to clean the inner surface of the glass window.

In the conventional configuration, the watertight rotary bearing 14 is required in a portion where the shaft 12 of the motor 11 is passed through the end walls 3 and 4. Further, a surface pressure load means for the wiper is separately required, and the configuration in which the rotating arm 10 is provided in the water tank has a problem that the water tank becomes large.
The present invention is intended to provide an optical water quality meter that can solve the above-described problems with a configuration that does not use a watertight rotary bearing.

  The optical water quality meter of the present invention projects light from the light emitting part into the water tank through a transparent window provided in the water tank that contains the water to be measured, and the light receiving part receives light emitted through another transparent window. In the optical water quality meter configured as described above, a wiper provided on each of the transparent windows and movable along the inner surface of the transparent window, an inner permanent magnet attached to the rear surface of the wiper, and the inner permanent magnet from the outside of the water tank. And an outer permanent magnet provided so as to be movable substantially parallel to the inner surface of the transparent window in a state where the magnet is attracted and the wiper is pressed against the inner surface of the transparent window. Item 1).

  In this means, the outer permanent magnet and the inner permanent magnet attract each other, and the wiper is pressed against the transparent window with a predetermined surface pressure by pressing the back surface against the inner permanent magnet, and the outer permanent magnet is pressed against the inner surface of the transparent window. For example, when moved by manual operation, the wiper and the inner permanent magnet move together, thereby cleaning the inner surface of the transparent window against which the wiper is pressed.

  It is preferable that a reciprocating drive unit that reciprocates the outer permanent magnet along a predetermined movement path parallel to the inner surface of the corresponding transparent window is provided outside the water tank (Claim 2). In this configuration, when the reciprocating drive unit is operated, the outer permanent magnet reciprocates along a predetermined movement path. By this reciprocation, the outer permanent magnet and the inner permanent magnet attract each other and reciprocate in a state where the wiper is pressed against the inner surface of the transparent window, and the wiper cleans the inner surface of the transparent window. Since a drive part is provided in the outer side of a water tank, it can be set as the structure which the drive shaft which moves a wiper does not penetrate the wall surface of a water tank.

  It is preferable that a guide is provided in the water tank so that the wiper and the inner permanent magnet move along a predetermined linear path including the inner surface of the transparent window. In this configuration, since the guide is provided, the inner permanent magnet moves reliably along the predetermined path. This ensures that the inner surface of the transparent window is cleaned.

  The water tank comprises a cylindrical portion having a predetermined substantially rectangular cross-sectional shape, end walls having the transparent windows provided at both ends of the cylindrical portion, and an inlet and an outlet of measurement water provided in the cylindrical portion. The guide may be an inner wall of the cylindrical portion adjacent to the end wall (claim 4). In this configuration, since the shape of the inner surface of both ends of the water tank is used as a guide, it is not necessary to provide a separate guide member, and the cost can be reduced by simplification.

  The reciprocating drive unit may be a rotating arm attached to a rotating shaft that is driven to reciprocate by a motor, and the outer permanent magnet may be attached to the rotating arm. 5). In this configuration, since the arm reciprocates by the reciprocating drive of the motor, the outer permanent magnet reciprocates while drawing an arc. When there is no guide, the inner permanent magnet reciprocates along the same arc, and when there is a guide, there is no need to make the reciprocation distance too long, so the outer permanent magnet is almost close to linear movement, and the inner permanent magnet moves along the straight guide. The inner permanent magnet can be driven without any trouble so as to move without deviating from the movement range of the permanent magnet.

  The reciprocating drive unit is axially supported at a fixed position, and a crank pin is engaged with a rotary arm having the outer permanent magnet attached to the tip and a groove provided along the longitudinal direction of the rotary arm. And a motor-driven crankshaft (claim 6). In this configuration, since the motor rotates in a certain direction and the rotating arm reciprocates by the crank mechanism, the outer permanent magnet reciprocates while drawing an arc. When there is no guide, the inner permanent magnet reciprocates along the same arc, and when there is a guide, there is no need to make the reciprocation distance too long, so the outer permanent magnet is close to linear movement, and the outer permanent magnet becomes a linear guide. The inner permanent magnet can be driven without any trouble so as to move without departing from the moving range of the inner permanent magnet.

  An outer guide for restricting a movement path of the outer permanent magnet, a connecting rod connected to the outer permanent magnet, and a connecting rod connected to the outer permanent magnet so that the reciprocating drive unit reciprocates the outer permanent magnet in a piston shape. And a crank shaft coupled to the crank pin and driven by a motor. In this configuration, the motor rotates in a certain direction, and the outer permanent magnet reciprocates along a straight line like a piston by the outer guide and the crank mechanism. If there is no guide for the inner permanent magnet, the inner permanent magnet moves back and forth along a straight line.If there is a guide for the inner permanent magnet, the inner permanent magnet moves along the guide by matching the outer guide. It can drive without.

The invention according to claim 1 is a configuration in which the shaft for driving the wiper does not penetrate the water tank wall, and the surface pressure necessary for the wiper is obtained by the magnetic force, and a rotating arm or the like is not provided in the water tank. The effect which can form a water tank small is produced.
Since the drive shaft for moving the wiper does not pass through the wall surface of the water tank, the invention according to claim 2 eliminates the need for measures against water leakage at the shaft penetration part and does not provide the wiper support arm in the water tank. There is an effect that can be formed small.
The invention according to claim 3 has an effect that the inner surface of the transparent window is reliably cleaned.
The device according to claim 4 has an effect that the cost of the water tank can be reduced.
Since the devices according to claims 5, 6, and 7 are motor-driven, there is an effect that can be incorporated into a measurement program so as to perform a cleaning operation prior to the measurement operation of the water quality meter.

  In an optical water quality meter configured to project light from a light emitting unit into a water tank through a transparent window provided in a water tank containing water to be measured and receive light emitted through another transparent window by a light receiving unit, A wiper provided on each of the transparent windows and movable along the inner surface of the transparent window, an inner permanent magnet attached to the rear surface of the wiper, and the inner permanent magnet from the outside of the water tank to attract the wiper. An outer permanent magnet provided to be movable substantially parallel to the inner surface of the transparent window in a state of being pressed against the inner surface of the transparent window, the outer permanent magnet being parallel to the inner surface of the corresponding transparent window. A reciprocating drive part that reciprocates along a predetermined movement path is provided outside the water tank, and the wiper and the inner permanent magnet are moved along a predetermined linear path including the inner surface of the transparent window. Provide a guide It is desirable The water tank has a cylindrical portion having a predetermined substantially rectangular cross-sectional shape, end walls having the transparent window provided at both ends of the cylindrical portion, and an inlet and an outlet of measurement water provided in the cylindrical portion. In this case, the inner wall of the cylindrical portion adjacent to the end wall can be used as the guide.

An embodiment of the present invention will be described with reference to FIG. The optical water quality meter 1 includes a water tank 2, a light emitting unit 3, a light receiving unit 4, a wiper device 5, and the like.
The water tank 2 includes a cylindrical portion 6 having a rectangular cross-sectional shape, end walls 7 at both ends of the cylindrical portion 6, transparent windows 8 provided on the end walls 7, and an inlet 9 for measurement water provided on the cylindrical portion 6. And an outlet 10. The cylindrical part 6 and the end wall 7 are made of a synthetic resin, for example, vinyl chloride.
The light emitting unit 3 is provided outside the transparent window 8 of one end wall 7 so as to project light into the water tank 2, and the light receiving unit 4 passes through the water tank 2 outside the transparent window 8 of the other end wall 7. It is provided so as to receive light from the light emitting section 3 that comes out. Although detailed description is omitted for this part, turbidity and color are determined from the state when the predetermined light from the light emitting unit 3 is received by the light receiving unit 4 through the water to be measured in the water tank 2. It can measure the degree and functions as an optical water quality meter.

  The wiper device 5 is provided in each of the transparent windows 8 and 8 and is movable along the inner surface of the transparent window. The inner permanent magnets 12 and 12 attached to the rear surfaces of the wipers 11 and 11 and the water tank. 2, outer permanent magnets 13 and 13 provided so as to attract each other corresponding to the inner permanent magnet 12, and reciprocating drive units 14 and 14 of the wipers 11 and 11. In this example, the transparent windows 8 and 8 are formed of a transparent glass plate having a diameter of 6 mm, and are provided so that the inner surface coincides with the inner surface of the end wall 7. The wiper 11 is made of felt having an appropriate thickness, for example, 2 mm, and is a square having a side of about 10 mm. The inner permanent magnet 12 and the outer permanent magnet 13 are ferrite magnets having a thickness of 5 mm and a side of 10 mm that do not rust with water. The wiper 11 is arranged such that one surface (back surface) is attached to the inner permanent magnet 12 and the other surface faces the inner surface of the transparent window 8. The outer permanent magnet 13 and the inner permanent magnet 12 are attracted to each other and press the wiper 11 against the inner surface of the transparent window 8, and when the outer permanent magnet 13 moves along the window surface, both the wiper 11 and the inner permanent magnet 12 are brought together. It moves along the inner surface of the transparent window 8. The inner dimensions of the cross-sectional shape of the tubular portion 6 of the water tank 2 are a height of 12 mm and a width of 25 mm that allow the inner permanent magnet 12 and the wiper 11 to move horizontally for cleaning.

  The reciprocating drive unit 14 includes a motor 15, a drive shaft 16 provided parallel to the longitudinal direction of the water tank 2, gears 17 and 18 that reduce the rotation of the motor 15 and transmit the rotation to the drive shaft 16, and the drive shaft 16. It is comprised with the rotation arm 19 to which the base end part was fixed. In this case, the two rotating arms 19 at both ends are driven by one drive shaft 16, and the outer permanent magnets 13, 13 corresponding to the transparent windows 8, 8 of the both end walls 7, 7 are respectively rotated. It is attached to the tip of the moving arm. In the figure, reference numeral 20 denotes a bearing, which is fixed to a support portion side of the water tank 2 (not shown) by supporting the drive shaft 16 at a predetermined position. The motor 15 can rotate forward and backward, and the rotation direction is switched when the rotation arm 19 reaches a predetermined rotation end. As a result, the rotating arm 19 reciprocally rotates, so that both outer permanent magnets 13 reciprocate while drawing an arc. The motor 15 is driven by an appropriate control unit. When stopped, as shown by a solid line in FIG. 1B, the transparent window 8 is always at one moving end where the wiper 11 does not face, that is, at the standby position. It is supposed to be located.

  The optical water quality meter 1 configured in this way normally cleans the transparent window 8 prior to measuring the water quality. The cleaning is completed by operating the motor 15 for a predetermined time with a timer or the like. That is, when the motor 15 is operated, the rotating arm 19 is reciprocally rotated via the gears 17 and 18 and the drive shaft 16, whereby the outer permanent magnet 13 is reciprocated along the arc, and the inner permanent magnet 12 is wiped. 11 and the outer permanent magnet 13, the lower surface and the upper surface of the inner surface of the end of the water tank 2 act as a guide for restricting the movement to a substantially horizontal linear movement, and the inner permanent magnet 12 and the wiper 11 are The wiper 11 cleans the inner surface of the transparent window 8 and at least the end wall 7 around the inner surface of the transparent window 8. When the motor movement time ends, the wiper 11 stops at the standby position. The water quality is then measured.

  The shaft for driving the wiper 11 does not penetrate the wall of the water tank 2, the surface pressure necessary for the wiper 11 is obtained by the magnetic force, and the rotating arm 19 is not provided in the water tank. As long as the standby position 11 is secured from the transparent window 8, the water tank 2 can be formed much smaller than before. Further, since the drive shaft 16 for moving the wiper 11 does not penetrate the wall surface of the water tank 2, it is not necessary to take measures against water leakage at the shaft penetration portion. Moreover, since the movement of the wiper 11 is guided by the shape of the inner surface of the end of the water tank 2 and reliably passes through the inner surface of the transparent window 8, the inner surface of the transparent window 8 is reliably cleaned. Moreover, since the shape of the inner surface of both ends of the water tank 2 is used as a guide, it is not necessary to provide a separate guide member, and the cost can be reduced.

In the above embodiment, the cross-sectional shape of the water tank 2 is a small rectangle that allows the wiper 11 to move horizontally and secure a standby position, but may have another arbitrary cross-sectional shape depending on circumstances. In that case, it is preferable to provide guides for regulating the reciprocating path so that the wiper cleans the inner surface of the transparent window as ridges on both sides along the moving direction, for example.
Further, although the inner permanent magnet 12 and the wiper 11 are square, other shapes may be used, for example, a rectangle, a circle, or the like. In the case of a circle, smooth movement can be expected by rolling when moving while being restricted by the guide.

  The reciprocating drive unit 14 may be a reciprocating drive unit 14a or 14b having a configuration schematically shown in FIGS. 3A, 3B, 3C, or 3D in addition to the above-described embodiment. In (a) and (b), an outer permanent magnet 13 is attached and a rotating arm 19a supported by a shaft 21 at a fixed position, and a groove 22 provided in the rotating arm 19a along the longitudinal direction. And a crankshaft 24 driven by a motor with which a crankpin 23 is engaged. In this configuration, the motor 25 rotates in a certain direction, and the rotating arm 19a reciprocates by the crank mechanism. Therefore, the outer permanent magnet 13 reciprocates while drawing an arc indicated by an arc arrow 28. 3 (c) and 3 (d) are connected to the outer permanent magnet 13 and the outer guide 26 for regulating the movement path of the outer permanent magnet 13 so that the outer permanent magnet 13 is driven to reciprocate like a piston. The connecting rod 27 and a motor-driven crankshaft 24 coupled to the connecting rod 27 and the crank pin 23 are provided. In this configuration, the motor 15 rotates in a certain direction, and the outer permanent magnet 13 reciprocates along a straight line like a piston in the direction of the straight arrow 29 by the outer guide 26 and the crank mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of one Example of this invention, (a) is a longitudinal cross-sectional front view, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (b). It is the schematic of the conventional optical water quality meter, (a) is a longitudinal front view, (b) is CC sectional drawing of (a). It is the schematic which shows the other example of the reciprocating drive part of this invention, (a) is a front view, (b) is a side view. It is the schematic which shows the further another example of the reciprocating drive part of this invention, (a) is a front view, (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical water quality meter 2 Water tank 3 Light emission part 4 Light receiving part 5 Wiper apparatus 6 Cylindrical part 7 End wall 8 Transparent window 9 Inlet 10 Outlet 11 Wiper 12 Inner permanent magnet 13 Outer permanent magnet 14 Reciprocating drive part 15 Motor 16 Drive shaft 17 Gear 18 Gear 19 Rotating arm 20 Bearing 21 Shaft 22 Groove 23 Crank pin 24 Crank shaft 25 Motor 26 Guide 27 Connecting rod 28 Arc arrow 29 Linear arrow

Claims (7)

  In an optical water quality meter configured to project light from a light emitting unit into a water tank through a transparent window provided in a water tank containing water to be measured and receive light emitted through another transparent window by a light receiving unit, A wiper provided on each of the transparent windows and movable along the inner surface of the transparent window, an inner permanent magnet attached to the rear surface of the wiper, and the inner permanent magnet from the outside of the water tank to attract the wiper. An optical water quality meter comprising: an outer permanent magnet that is provided so as to be movable substantially parallel to the inner surface of the transparent window while being pressed against the inner surface of the transparent window.   2. The optical water quality meter according to claim 1, wherein a reciprocating drive unit for reciprocally driving the outer permanent magnets along a predetermined movement path parallel to the inner surface of the transparent window is provided outside the water tank. Total.   The optical water quality meter according to claim 1 or 2, wherein a guide is provided in the water tank so that the wiper and the inner permanent magnet move along a predetermined linear path including an inner surface of the transparent window. An optical water quality meter.   The optical water quality meter according to claim 3, wherein the water tank has a cylindrical portion having a predetermined substantially rectangular cross-sectional shape, end walls having the transparent windows provided at both ends of the cylindrical portion, and the cylindrical portion. An optical water quality meter comprising an inlet and an outlet of measurement water provided, wherein the guide is the inner wall of the cylindrical portion adjacent to the end wall.   5. The optical water quality meter according to claim 2, 3, or 4, wherein the reciprocating drive unit is a revolving arm attached to a revolving shaft that is reciprocally rotated by a motor, An optical water quality meter in which a magnet is attached to the rotating arm.   5. The optical water quality meter according to claim 2, 3, or 4, wherein the reciprocating drive unit is a rotary arm that is axially supported at a fixed position and has the outer permanent magnet attached to the tip thereof, and the rotation thereof. An optical water quality meter having a motor-driven crankshaft in which a crankpin is engaged with a groove provided in the arm along the longitudinal direction. 5. The optical water quality meter according to claim 2, wherein the reciprocating drive unit restricts a movement path of the outer permanent magnet so that the outer permanent magnet is reciprocated in a piston shape. An optical water quality meter comprising: an outer guide; a connecting rod connected to the outer permanent magnet; and a crank shaft coupled to the connecting rod by a crank pin and driven by a motor.

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