JP2513533B2 - Water quality measuring device - Google Patents

Description

The present invention relates to a water quality measuring device using an immersion sensor such as a dissolved oxygen meter or a pH meter.

[Prior Art] For example, a dissolved oxygen meter is generally used to measure the amount of dissolved oxygen in wastewater in a sewage treatment tank. In that case, the wastewater to be measured is at a relatively deep position, so
Conventionally, as shown in FIG. 6, a protection cylinder 51 is held in a sewage treatment tank, and an immersion type sensor 53 connected to an end of a cable 52 for signal transmission is connected from above the holding cylinder 51. ,
A sensor unit 54 including measuring electrodes and the like formed at the end of the sensor unit 54.
Is held so that it does not project from the lower end of the protective cylinder 51 and holds it, and a cleaning nozzle 55 is provided so that a cleaning fluid such as air or water can be sprayed to the sensor unit 54. .

In FIG. 6, reference numeral 56 is a member for fixing the protective cylinder 51.

[Problems to be Solved by the Invention]

By the way, in the wastewater flowing in the sewage treatment tank, foreign substances are often suspended, and in many cases gas is dissolved before reaching the sewage treatment tank. Since the sewage is constantly stirred while blowing air, the sewage as a sample often contains air bubbles.

Therefore, in the case where the immersion type sensor 53 is provided so that the sensor unit 54 faces downward as in the above-mentioned conventional technique, bubbles and foreign matter in the dirty water are apt to adhere to the sensor unit 54, and even if the cleaning nozzle 55 is used. Even if the cleaning fluid is blown as a jet jet from the above, bubbles and foreign matter are difficult to separate from the sensor unit 54, and as a result, an error may occur in the measurement of dissolved oxygen, or the measurement may become impossible.

When cleaning the sensor unit 54 by spraying a cleaning fluid from the cleaning nozzle 55 onto the sensor unit 54,
Since the cleaning fluid was sprayed on 54,
There is also a problem that the fine solid matter contained in the dirty water directly hits the sensor unit 54 together with the cleaning fluid, and, for example, when the sensor unit 54 is provided with a glass electrode or the like, the glass electrode is damaged. .

The above problem also occurs in other water quality measuring devices such as a pH meter.

[Problems to be Solved by the Invention]

The present invention has been made in consideration of the above matters,
The purpose is to make it difficult for air bubbles, foreign substances, etc. contained in the sample to adhere to the sensor part, and even if they adhere, they should be separated from the sensor part immediately so that the predetermined measurement can always be performed accurately. Another object of the present invention is to provide a water quality measuring device that can be used and is not damaged by cleaning the sensor unit.

[Means for solving the problem]

In order to achieve the above-mentioned object, the water quality measuring device of the present invention has a holder base that can be raised and lowered along a guide member provided in a vertical direction, with a sensor portion at a longitudinal side end portion slightly protruding from an end surface. The feature is that the formed immersion type sensor is held in a horizontal state.

In that case, the holder base may be held by a hanging member that hangs along the guide member, and the cleaning fluid may be sprayed onto the sensor unit.

[Action]

In the water quality measuring device having the above-mentioned characteristic configuration, since the immersion type sensor having the sensor part formed on the longitudinal side end is provided in a horizontal state, bubbles and foreign matters contained in the sample Difficult to attach to the sensor part, and even if it adheres, it will be immediately separated from the sensor part. Therefore, the predetermined measurement can always be performed with high accuracy.

When the holder base is held by the hanging member that hangs along the guide member, the holder base is stabilized and the immersion sensor can be held in a predetermined state. Also, when spraying a cleaning fluid on the sensor part, unlike the conventional method, it is possible to perform a predetermined cleaning without directly spraying on the sensor part. An object will not hit the sensor section directly, and the sensor section will not be damaged.

〔Example〕

Hereinafter, the details of the present invention will be described with reference to the drawings.

1 to 3 show a dissolved oxygen meter as a water quality measuring apparatus according to an embodiment of the present invention. In these figures, 1 is, for example, a sewage treatment tank, in which waste water 2 is stored. ing. Reference numeral 3 denotes a pipe-shaped attachment member provided vertically above the wall surface 1a of the sewage treatment tank 1 and made of a material having appropriate mechanical strength and corrosion resistance, such as stainless steel, and the upper surface 1b of the sewage treatment tank 1 It is fixed and held in a vertical direction by a fixing member 6 with respect to a holding member 5 which is horizontally installed by a supporting column 4 which is erected on the. A flange 7 is provided at the lower end of the mounting member 3.

Reference numeral 8 denotes a guide member provided in a vertical direction to guide a holder base 13 described later, and two pipes 9 made of, for example, stainless steel are provided at one end side thereof so as to have an appropriate interval between them. The fixing member 11 is formed by fixing it with the flange 10 and fixing it with a fixing tool 11 on the other end side thereof. With the flange 10 butted against the flange 7, a mounting member 3 using a fastener 12 such as a bolt or a nut. Is connected to the bottom of.

Reference numeral 13 denotes a holder base that freely moves up and down along the guide member 8. The holder base 13 is composed of a plate-shaped base body 14 and a guide block 15 integrally provided on the upper surface thereof, and is made of, for example, stainless steel. The guide block 15 and the corresponding base body 14 are provided with elongated guide holes 16 so that the guide member 8 can be inserted therethrough.

An immersion type sensor (sensor for measuring dissolved oxygen) 18 having a sensor portion 17 formed at the end portion in the longitudinal direction is detachably attached to the upper surface of the base body 4 by a fixing member 19 so as to be in a horizontal state. It is fixedly held at. A conventional one can be used for this immersion type sensor 18, and 20 is a signal extracting cable thereof. Further, a nozzle 21 for spraying a cleaning fluid, for example, air is attached to the lower portion of the base body 14 so as to face the sensor unit 17, and 22 is a supply pipe for supplying air.

The signal extraction cable 20 and the supply pipe 22 are
Holes formed in flanges 10 and 7, respectively (not shown)
And the cable 20 for signal extraction, which is led out through the inside of the attachment member 3, is connected to the measuring device main body (not shown).
Further, the supply pipe 22 is an air supply device (not shown).
Respectively connected to.

Reference numeral 23 denotes an elevating device for vertically elevating the holder base 13 along the guide member 8 in a vertical direction. The hoisting device 25 is attached to the upper end of the column 3 and has a handle 24 and a stopper mechanism (not shown). It is composed of a suspending member 26 such as a wire made of stainless steel that is wound up and rewound by a connecting member 27.
It is fixed to a locking tool 28 protruding from the guide block 15 of the holder base 13 via. Therefore, the handle 24
By operating the holder base 13 to move the guide member 8
The holder base 13 can be held at a predetermined position by the stopper mechanism.

Further, in the water quality measuring device having the above-mentioned configuration, the immersion type in which the sensor part 17 is formed at the end in the longitudinal direction on the holder base 13 which can be raised and lowered along the guide member 8 provided in the sewage treatment tank 1 in the vertical direction. Since the sensor 18 is held in a horizontal state, it is difficult for air bubbles, foreign substances, etc. contained in the sewage 2 as a sample to adhere to the sensor unit 17, and even if these adhere, they are immediately separated from the sensor unit 17. . Therefore, the predetermined measurement can always be performed with high accuracy.

And in the above embodiment, the holder base 13 is
When held by a hanging member that hangs along the guide member 8, the holder base 13 becomes stable and the immersion type sensor 18
Can be held in a predetermined state. Also, the sensor unit
When air is blown against 17, unlike the conventional case, even if it is not properly removed from the sensor unit 17, for example,
As shown by the phantom line in FIG.
Predetermined washing can also be performed by spraying so as to pass in front of 17, so that the fine solid matter contained in the sample does not hit the sensor section 17 directly, and the sensor section 17 is damaged. Will disappear.

Further, the immersion type sensor 18 can be raised from the dirty water 2 together with the holder base 13 by winding the hanging member 26 with the winding machine 25. Therefore, the immersion type sensor 18 can be inspected at an appropriately raised position, It can be replaced and maintenance can be performed easily.

The present invention is not limited to the above-mentioned embodiments, but can be implemented by being modified in various ways.

That is, in the example shown in FIG. 4, the guide member 8 composed of two pipes 9 is fixed at its upper end to a horizontally horizontal holding member 29 such as channel steel by a fixing member 30 and at the same time the signal is taken out. The cable 20 and the supply pipe 22 are also used as a suspension member for the holder base 13.

Further, in the example shown in FIG. 5, the holder base 31 is made of a slightly thick material, and the holder base 31 is formed with insertion holes 32 through which the two pipes 9 are respectively inserted.

The guide member 8 is not limited to the one having the above-described structure, but may have various structures such as a single pipe or a round bar. Further, the sensor unit 17 may be washed with washing water.

〔The invention's effect〕

As described above, in the water quality measuring device of the present invention, the sensor base is formed at the longitudinal end on the holder base that is vertically movable along the guide member provided in the vertical direction, with the sensor base slightly protruding from the end face. Since the immersed type sensor is held horizontally, it is difficult for air bubbles and foreign substances contained in the sample to adhere to the sensor part. ,
Therefore, the predetermined measurement can always be performed with high accuracy.

When the holder base is held by the hanging member that hangs along the guide member, the holder base is stable and the immersion sensor can be stably held in a predetermined state.

Further, when the cleaning fluid is sprayed on the sensor unit, it is not sprayed properly on the sensor unit as in the prior art, but only by spraying air so as to pass in front of the sensor unit. Since the cleaning can be performed, the fine solid matter contained in the sample will not hit the sensor section directly, and the sensor section will not be damaged.

Further, the immersion type sensor can be lifted from the dirty water together with the holder base by winding the hanging member using a hoist or the like. Therefore, the immersion type sensor can be inspected or replaced at an appropriately raised position. Therefore, maintenance can be easily performed.

As described above, according to the water quality measuring device of the present invention, it is difficult for air bubbles, foreign substances, etc. contained in the sample to adhere to the sensor part, and even if these adhere, they are immediately separated from the sensor part, so that a predetermined measurement can be performed. Can be always performed with high accuracy, and the sensor section is not damaged by cleaning the sensor section, and maintenance can be performed.

Further, the immersion sensor is not a special one, and the same one as the conventional one can be used, and the area around the immersion sensor can be made compact.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, and FIG. 1 is a perspective view showing a holding state of a water quality measuring device of the present invention, and FIG.
FIG. 3 is a front view showing a main part thereof, and FIG. 3 is a configuration diagram showing a state in which the water quality measuring device is installed in a sewage treatment tank. 4 and 5 each show another embodiment of the present invention, and FIG. 4 is a perspective view showing a holding state of the water quality measuring device,
FIG. 5 is a perspective view showing another aspect of the holder base. FIG. 6 is a perspective view for explaining a conventional technique. 8 ... Guide member, 13, 31 ... Holder base, 17 ... Sensor part, 18 ... Immersion type sensor, 26 ... Hanging member.

Claims (2)

(57) [Claims] 1. A submerged sensor in which a sensor part is formed at a longitudinal side end part with a sensor part slightly protruding from an end face on a holder base which can be raised and lowered along a vertically provided guide member is brought into a horizontal state. A water quality measuring device characterized by being held as described above. 2. The water quality measurement according to claim 1, wherein the holder base is held by a hanging member hanging along a guide member, and a cleaning fluid is sprayed onto the sensor portion. apparatus.