JPH0424446Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrode cleaning device for measuring ion concentration in a solution to be measured.

[Conventional technology]

The above-mentioned ion concentration measurement electrode is used by being continuously inserted into a solution, and gelatinous water scale and algae in the solution tend to adhere to the electrode, and this adhesion causes errors in measurement values. may occur, or a situation that cannot be measured may occur.

An electrode cleaning device for avoiding such problems has been proposed, for example, in Japanese Utility Model Publication No. 58-5968.

This cleaning device includes a member surrounding the measurement electrode.
A soft spongy or hollow cleaning member is built in, a hole smaller than the diameter of the cleaning member is formed in the surrounding member, and gas or liquid is introduced into the surrounding member from the bottom. Means are provided for cleaning the measuring electrode by impingement of the cleaning member against the measuring electrode by supplying gas or liquid.

[The problem that the idea attempts to solve]

By the way, when the cleaning member collides with the measurement electrode and cleans the electrode surface, it is difficult to avoid the dirt from adhering to the surface of the cleaning member.However, in the above cleaning device, the ion concentration measurement chamber is Because it is shared in the cleaning chamber, if dirt adhering to the surface of the cleaning member is peeled off as the solution to be measured flows, the properties of the solution to be measured will be disturbed due to the dirt, and this may be the cause. There was an inconvenience that caused measurement errors.

An object of the present invention is to provide a cleaning device for an ion concentration measuring electrode that eliminates the above-mentioned disadvantages through simple improvements.

[Means to solve the problem]

The ion concentration measuring electrode cleaning device according to the present invention, which has achieved the above object, has a bottomed support in which the measuring electrode is vertically movably fitted, with a state in which cleaning particles are prevented from flowing out. A cleaning chamber is formed by providing a partition that allows the measurement electrode to pass through and prevents the cleaning piece from flowing out in a free state, and a liquid passage hole is provided above the partition of the support for measurement. It is characterized by forming a chamber and providing a spout for spouting liquid or gas into the cleaning chamber.

[Effect]

According to the above characteristic configuration, a cleaning chamber isolated from the measurement chamber is formed by the partition.

Therefore, when the measurement electrode is located in the measurement chamber, the cleaning piece remains stationary in the cleaning chamber, which is a closed space, and the dirt adhering to the cleaning piece is peeled off by the flow of the solution to be measured. This effectively prevents things like this from happening.

Alternatively, even if the dirt adhering to the cleaning piece is peeled off for some reason, it will simply float in the cleaning chamber, and the properties of the solution to be measured are prevented from being disturbed by the dirt.

Then, if necessary, the measurement electrode is placed in the cleaning chamber by penetrating the partition, and liquid or gas is jetted into the cleaning chamber to cause the cleaning piece to flow, thereby cleaning the electrode surface evenly. .

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 shows a cleaning device for a submerged type ion concentration measuring electrode.
It is a bottomed support body formed by screwing the support plate 16 through the support plate 16 at its upper end. 3
is a screw.

Reference numeral 20 denotes an electrode holding member which is inserted into the upper side of the support body 1 so as to be able to move up and down. A flange 15 is connected to the upper end of the electrode holding member 20, and a mounting plate 17 is provided so as to face the support plate 16. .

Two air cylinders 18 are mounted on this mounting plate 17.
is erected, and the rod 19 of the air cylinder 18 is fixed to the support plate 16, so that the electrode holding member 20 can be driven up and down.

Reference numeral 21 designates an electrode holder having a flange 14 connected to the upper end thereof, to which an electrode 22 for measuring ion concentration is attached, and is connected to the flange 15 of the electrode holding member 20 via a clamp 23 .

Reference numeral 7 denotes a partition attached to the threaded portion of the cleaning container 2, and the partition 7 and the cleaning container 2 form a cleaning chamber. 6 is a plurality of cleaning pieces housed in the cleaning chamber.

4 is a supply port provided outside the bottom wall of the cleaning container 2;
In communication with this, a spout 5 is provided inside the bottom wall of the cleaning container 2.
is provided. 24 is a tube connected to the supply port 4.

Reference numeral 8 denotes a liquid passage hole formed in the upper part of the partition body 7 with respect to the support body 1, which forms a measurement chamber through which the solution to be measured flows in and out of the support body 1, and through the electrode holding member 20. As the measuring electrode 22 moves up and down, the sensitive part of the measuring electrode 22 is moved between the measuring chamber and the cleaning chamber.

The partition body 7 is made of a thin plate made of rubber or synthetic resin, and as shown in FIG. 2, a radial cut 9 is formed in the center of the partition body 7, and the cleaning strip It is configured to allow the measurement electrode 22 to pass through in a state where the cleaning strip 6 is prevented from flowing out, and to prevent the cleaning strip 6 from flowing out in a free state.

Further, the cleaning piece 6 is made of rubber such as soft rubber or soft synthetic resin, and has a square, round, star-shaped, cylindrical shape, or a piece with protrusions on the surface thereof, etc., and is suitable for the electrode 22. It is formed into a shape suitable for contacting and removing deposits, preferably having a shape with relatively many edges, and can be foamed or unfoamed.

The size of this cleaning piece 6 may be determined depending on the size of the cleaning container 2, etc., but for example, the outer diameter is 10
The purpose of cleaning can be achieved with a size of about 7 to 8 mm.

As shown in FIGS. 3 and 4, the clamp 23 includes a pair of clamp pieces 3 that are semicircular and have a U-shaped cross section.
One ends of a and 3b are rotatably connected to each other via a pin 10, and the end of a bolt 11 is pivotally attached to the other end of the clamp piece 3a, and the clamp 3b
An opening 12 into which a bolt 10 is fitted is provided at the other end.

The cleaning device configured as described above is attached to an installation tank or the like using the support plate 16.

As shown in FIG. 1, the sensitive part of the electrode 22 is located in the measurement chamber, and the solution to be measured is caused to flow into the measurement chamber through the liquid passage hole 8, thereby controlling the ion concentration of the solution to be measured. Measurements are taken.

To clean the electrode 22, first, the air cylinder 18 is contracted to lower the measuring electrode 22, and the sensitive part of the electrode 22 is placed in the cleaning chamber through the cut 9 of the partition 7.

On the other hand, air is ejected from the tube 24 through the spout 5 into the cleaning chamber to flow the cleaning piece 6 together with the solution to be measured in the cleaning chamber, and the cleaning piece 6 is brought into repeated contact with the electrode 22 to remove deposits on the surface of the electrode 22. By flowing the cleaning pieces 6 over a predetermined period of time, the cleaning pieces 6 come into even contact with the surface of the electrode 22, so that almost all of the deposits can be removed.

After this cleaning is completed, the air cylinder 18 is operated to position the electrode 22 in the measurement chamber.

Note that it is also possible to eject a cleaning liquid such as water from the spout 5 into the cleaning chamber instead of air.

When air is to be blown out, the acid or alkaline cleaning liquid is injected into the cleaning chamber, and then the air is blown out.The chemical reaction of the acid or alkaline cleaning liquid and the contact with the cleaning piece 6 cause the electrode 22 to be blown out. The deposits can be effectively removed and the electrode 22 can be removed more efficiently.
can be cleaned.

As in this embodiment, if the partition 7 separating the measurement chamber and the cleaning chamber is made of a thin plate and the cuts 9 are formed,
The adhesion of the electrode 22 can also be removed by friction with the partition body 7 when the electrode 22 passes through.

However, it is not essential to make the partition 7 a thin plate, and the partition 7 can be changed to, for example, a brush structure. In this case, the deposits on the electrode 22 can be removed more effectively.

Incidentally, if the cleaning container 2 is made detachable from the support body 1 using the screws 3, etc., as in the above embodiment,
Cleaning inside the cleaning container 2 is easy.

Further, the air cylinder 18, which is a means for moving the electrode 22, can be replaced with a screw shaft or the like.

Further, although the spout 5 is provided at the bottom of the cleaning container 2, it may be provided at any arbitrary position such as the peripheral wall.

[Effect of idea]

As explained above, according to the cleaning device for the ion concentration measuring electrode according to the present invention, the cleaning chamber is separated from the measurement chamber and is formed by the partition, so that when measuring the ion concentration, the cleaning piece is kept in a closed space. The cleaning piece can be placed in a stationary state, and dirt attached to the cleaning piece is effectively prevented from being peeled off by the flow of the solution to be measured.

Alternatively, even if the dirt adhering to the cleaning piece is peeled off for some reason, it will simply float in the cleaning chamber, and the properties of the solution to be measured are prevented from being disturbed by the dirt.

In this way, the inconvenience of measurement errors caused by dirt adhering to the cleaning piece has been reliably resolved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a cleaning device for an ion concentration measuring electrode, FIG. 2 is a plan view of a partition plate, FIG. 3 is a plan view of a clamp, and FIG. 4 is a partially cutaway front view of the clamp. 1...Support, 5...Spout port, 6...Cleaning piece,
7... Partition body, 8... Liquid passage hole, 22... Measurement electrode.

Claims (1)

[Scope of utility model registration request] A partition body that allows the measurement electrode to pass through in a state that prevents the outflow of the cleaning piece and prevents the outflow of the cleaning piece in the free state, on the lower side of the bottomed support body into which the measurement electrode is fitted so as to be able to move up and down. is provided to form a cleaning chamber, a liquid passage hole is provided above the partition of the support to form a measurement chamber, and a spout for spouting liquid or gas is provided in the cleaning chamber. A cleaning device for an ion concentration measuring electrode, characterized in that: