JPS58208655A - Ph measuring apparatus - Google Patents

Abstract

PURPOSE:To impart self-cleaning function, by a method wherein a cylindrical pH sensor part having a measuring window is contained in an inner wall and a float part containing the measuring window as the part of an outer wall and having an outer shape molded into a spherical form is provided. CONSTITUTION:A pH sensor part 7 is cylindrical and the lower periphery of the inner liquid storage part 13 thereof is a liquid communication part 11 while the measuring window provided to the under surface thereof is a glass electrode 12. A float part 20 consists of a spherical outer wall 21, a cylindrical inner wall 22 and an attachment part 23 to an arm. The attachment part 23 is similarily cylindrical and the lower part of the inner wall thereof is provided with a thread part 29 and engaged with the peripheral flange 31 of a holder 30 above the pH sensor part 1 by the thread part. Because the pH sensor part is embedded in the float part and the under surface thereof immersed in a liquid for the sake of measurement is formed as the part of the float part, the pH sensor part is subjected to self-cleaning by a water stream and extremely convenient.

Description

[Detailed description of the invention] The present invention relates to a PH concentration device.

In wastewater treatment, sewage treatment, etc., it is required to control the pH of water to the Kat value.

Normally, IJ&Risa water is required to be returned to a pH of 7, and a large number of P H@r systems are used in this treatment process.

By the way, a PH sensor F is known that uses f glass electrodes, but since the glass electrode d of this PH sensor is used by being immersed in waste water, the so-called glass electrode etc.
``Water scale 7'' accumulated, making it impossible to carry out accurate PH measurements, and making it difficult to measure the extreme pH itself.

Therefore, a method can be considered in which water or air is sprayed onto the glass electrodeposited portion of the PH sensor to clean the water scale underwater. However, this method requires special equipment for spraying water or air. Moreover, since a part of the cleaning mechanism must be attached to the PH sensor f-,
The H measuring device itself becomes larger and more complex. Furthermore, there was a drawback that the cost of the entire device increased.

The present invention has been made in view of these drawbacks, and its purpose is to provide a PH having a self-cleaning function without increasing the size and complexity, and without causing a significant increase in cost.
It is to provide measurement equipment.

FIG. 1 is a side view of a portion of the PH sensor used in the present invention. In the figure, numeral 11 indicates a liquid junction of the PH sensor section 1, and numeral 12 indicates a glass used for measurement. The pH sensor part 1 has a cylindrical shape, and the lower part of the liquid storage part 13 is the liquid junction part 11, and the lower part 1 has a glass pole 12.

Above the inner liquid storage cap 13 is the plug part J4, which is 0
Rin! 15 is provided, and the upper part thereof is a 1-inch screw 16, and further above that is a connector 17, which connects the connector 1.
7, a signal related to PH[-2 is output.

The 29th a float part is shown. Float part 20Fi, spherical external sales 2
1, a cylindrical inner wall 22, and an attachment part 23 to the arm.

The outer wall 21 and the inner wall 22 are integrally formed, and a piece of iron 25 serves as a weight at the bottom of the bar 24 created by them.

Power-generating styrene 26 is put in as a burst.

Thereby, the float part 20 can be slightly submerged in the liquid surface curve 27 and float. In addition, on the inner wall 22,
The human row screw 28A is cut, and the screw 28 of the mounting part 23 is cut.
B, the structure is such that a portion of the Ptl senya l is delivered. The mounting part 23 also has the same cylindrical shape, and a screw 29 is cut in the lower part of the inner wall thereof, and the holder 3 above the PH sensor part 1
Field Iyu, stone, interlocked with the circumferential line 31 of 0 with screws.

A molding part 32 is provided above the holder 30 6,
A lead heel 33 extends from the connector 17 of the PH sensor 1.

The float part 20 configured in this way is as shown in FIG.
By connecting the arm 50 and the attachment part 23,
You will be able to move within a certain range.

The arm 50#'i is provided to penetrate the fixture 51. This fixture 51 consists of an adjustment needle 52, a main body 53, and a notch 54 that allows the fixture 51 to rotate freely.

The fixture 51 can adjust the length of the arm 50 with an adjustment screw 52, and the length of the arm 50 can be adjusted by adjusting the length of the float part 2 depending on the upper and lower sides of the liquid level 27.
It rotates following the vertical movement of 0.

55 is a stand erected from the liquid, and two supports 1156A and 56B are erected from this stand 55. This support rod 56A156B has w#57 protruding toward the front in the figure.
There are six. This I! The range of movement of the float section 20 is also limited by the height of the float section 57. Further, as shown by the broken line, the float part 20 is made to follow the fluctuations of the liquid level 27 as shown by the dashed line, and maintenance and inspection are performed.

As the PH measuring device is configured as described above, for example, at the liquid level, the fixture 51 is attached to the rod 57 provided at the top of the support rod 56A as shown in FIG. Adjust the length to the specified length and tighten the adjustment screw 52. Then, the float part 20 floats within a certain range due to fluctuations in the liquid level 27 or due to the flow of the liquid. At this time, the float g[! Bottom surface of 20 1-1 PH sensor part 1
The glass electrode 12 and the liquid junction 11 are formed by the glass electrode 12 and the liquid junction part 11. Therefore, the glass electrode 12 and the liquid junction 11 are constantly cleaned by the water flow as shown in FIG. That is, when the float part 20 rises, a water flow as shown by the arrow Xu in FIG. 4A is generated against the lower surface of the float part 20, and the glass electrode 12 and the liquid junction 11 are self-cleaned. Further, when the float part 20 descends, a water flow as shown by the arrow XLl in FIG. 4B is generated on the lower surface of the float part 20, and the glass electrode 12 and the liquid junction part 11 are self-cleaned.

In addition, the float part 20F: is also self-cleaned by moving on the liquid surface due to the horizontal water flow.

In this case, the glass electrode and liquid junction on the bottom surface of the PH sensor unit 1 are difficult to adhere to, so in practice,
Maintenance and inspection work will be unnecessary for a long time.

In addition, during maintenance and inspection, the FK can be inspected by placing it horizontally on the support rods 56A and 56B, as shown by the dashed line in FIG.

As described above, according to the present invention, a part of the PH-t7 is embedded in the float part, and the lower surface that is submerged in the liquid for measurement is part of the float part, so that the water flow can It is self-cleaning and extremely convenient.

According to such a device of the present invention, it is possible to prevent the device from becoming larger or more complicated, and to prevent a significant increase in cost.

Incidentally, in the present invention, the final measurement of PH is carried out by using the current obtained from a part of the PH sensor and from fg33 to a total fl! (not shown). It is led to the I equipment, amplified, converted to voltage, and made to swing a meter in proportion to this voltage.

[Brief explanation of drawings]

FIG. 1 is a side view of a part of the PH sensor used in the present invention.
FIG. 2 is a sectional view of the float, FIG. 3 is a perspective view of an embodiment of the device of the present invention, and FIG. 4 is a diagram showing how it is self-cleaned.

Claims (1)

[Claims] A part of a circular S-shaped PH7 sensor having a measurement preparation on the lower surface, *P
A float part with the H tensa sound 2 placed at the inner end, the said floating part being attached as a part of the outer wall, and the outer shape of the float part being spherical;
An arm for suspending a float part, a mounting part for connecting the float part and the arm, and a mounting part attached to a rod. The PH Chaos set is characterized by having a fixture that adjusts the tension of the arm and rotates according to the movement of the float.