JPS59102491A - Control system for water quality in pure water feed system - Google Patents

Abstract

PURPOSE:To supply only the water that meets water quality requirements by attaching a monitor which measures and displays the electrical conductivity of the water passing therethrough in each of the terminal valves or cock in a pure water feed system. CONSTITUTION:Plural branch pipelines 3, 3... are connected to a main pipeline 2 and are connected to terminal cocks 4, 4... in a water feed system of a closed type provided with the main pipeline 2 which returns and circulates the treating water fed from a pure water device 1 in one place. The deterioration in the water quality takes place only in the part of the branch line 3 where the water stagnates and therefore, only the water having the deteriorated quality is blown and discharged in the stage of opening the cock 4 by a display monitor for water quality. The display monitor for water quality consists of an adapter 5 at a power source side and a display meter unit 8' which are connected to each other by a cable 6. The plug 7 of the adapter 5 is inserted into the receptacle of the power source and a pair of electrodes 9, 9 of the unit 8' are projected into the flowing water. The electrical conductivity of said water is digitally or analogically displayed on a display meter 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a pure water purifier that processes pure water (or ultrapure water) centrally at one location using a water purifier and sends it to an appropriate usage location via water supply piping. It relates to water quality management systems used in water conveyance systems.

Traditionally, in research laboratories, underground laboratories, gas chambers, electronic industries, pharmaceutical industries, etc., deionized water equipment has been used to perform deionized water treatment in each place where pure water (or ultrapure water or less) is used. Alternatively, the deionized water can be centrally treated using deionized water equipment at several locations, and the treated deionized water is sent via water pipes to the terminal pulp or cock at each usage location.

The purity of the water purifier is measured using an electrical conductivity meter, etc., and the operation of the water purifier is maintained and managed so that water of a certain quality or higher is supplied for the specified purpose. .

By the way, in the former method, a deionized water device is installed at each place of use, which results in excessive equipment, which is disadvantageous in terms of cost.On the other hand, in the latter method, since the water treatment is centralized, there is a problem in terms of equipment. However, on the other hand, it is difficult to make the water pipes long, and because of this, there is a risk that the treated water sent from the water purifier may be affected by contamination in the water pipes or branch pipes. There is. Is this trend common in Japan? Il? This becomes more noticeable when the accumulation time is long or when the piping system is long.

Since the treated water supplied in this way is generally used for high-precision inspections, tests, or cleaning, it is necessary to fully control the extent to which the quality of the treated water that is sent out from the water purification device, which is the water supply source, deteriorates. If this is not possible, the reliability of the test results for hemorrhoids may be questioned, and in production-related cases, this may lead to an increase in the defective rate of products.

The inventor of the present invention has carried out various studies on odor based on these problems, and has found that the main problem with the centralized treatment method, which is advantageous in terms of equipment, is the deterioration in the quality of the treated water in the water supply system. It is understood that this is caused by the stagnation of treated water in the water supply system for a long time, resulting in the decomposition of CO2 or the elution of pure substances from the piping.As a result of such stagnation, the water quality The degraded area is not used as water but is blown and drained, and after the water supply system is turned on and water that satisfies the required water quality flows out from the valve or cock, this outflow is removed. The present invention was developed based on the idea that if treated water could be used, the difficulties of the 011 centralized treatment method could be substantially eliminated.

The quality of water flowing out from this end valve or cock can be measured and managed by directly observing its electrical conductivity using an electrode protruding into the flowing water. The management using F and Iff also has the advantage of indirectly dealing with contamination caused by bacteria, substances eluted from piping, and the like. In other words, these pollutions are also accumulated! This is a serious problem because if the operation of blowing and draining the accumulated water as the electrical conductivity total control index is performed, the contaminated water will also be blown away.

The gist of the present invention is to provide a pure water supply system in which a water supply source, a pure water device, is connected via a long water pipe to a plurality of end valves or cocks, in which each of the end valves or cocks, A water quality control system for a pure water supply system is characterized in that it is equipped with a monitor that measures the electrical conductivity of water and displays it digitally or analogously.

The present invention provides that the water supply system may be either a closed type main pipe circulation type in which the treated water sent from the water purification device is circulated back to the water purification device, or an ossin type non-circulation type. It is also applicable to the latter case, but it is particularly effective in the latter case. In other words, in the former type, water is constantly allowed to flow through the main pipe, and stagnation can be localized to pipes branched from the main pipe to end valves, etc., and water must be blown and drained before use. The water injection is always constant and the amount can be relatively small, but on the other hand, in the latter type, it depends on the distance from the pure water device such as the end valve, the usage situation with other end valves, etc. However, the amount of water to be blown and drained is not constant, and especially when using a terminal valve that is farthest from the water purification device, there is no indication that the necessary and sufficient amount of water will be blown and drained without the water quality monitor of the present invention. This is because the driver is unable to do so and ends up in a situation called blind driving.

In addition, the monitor attached to each terminal valve or cock lights up the rung or turns on the rung when the electrical conductivity measured by the electrode protruding into the water becomes below a predetermined value. In addition to switching the lighting from red to green (7" digital display), it is also possible to display the measured value with a meter (analog display), and the old location can be integrated into the terminal valve or cock. Alternatively, it may also be possible to place it nearby.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows a closed type water supply system equipped with a main pipe 2 in which treated water sent from one water purifier at - location is condensed and circulated. The number of branch pipes 3, 3゜3, etc. as required are connected,
Each is connected to a terminal cock (faucet) 4°4.4...

Such water supply systems are used in research rooms, inspection rooms, and laboratories.

Alternatively, it is used for cleaning processes in the electronics industry, etc., and the water purification equipment includes water quality display equipment, coarse filtration, dechlorination using activated carbon, mixed pet water purification equipment, reverse osmosis equipment, and ultrap-filtration cyclofilters. , an ultraviolet sterilizer, etc., to construct a water treatment system that can appropriately obtain water quality at a desired level.

In such a water supply system, treated water from the deionizer 1 is constantly circulated through the circulating main pipe 2, and the end cock 4 is opened at the required location to allow water to flow out and be used. At this time, since it is only in the branch pipe 3 that the water quality is considered to have deteriorated due to accumulation, this amount of water is blown out at the cock υ ().
As already mentioned, once the water has been drained, the quality of the runoff water will be in a favorable condition.

A feature of the present invention is that a water quality display monitor, which will be described later, is attached to each of the end cocks 4, 4. In this example, a water quality display monitor is constituted by a power supply side adapter 5 having a built-in circuit shown in FIG. The power supply side adapter 5
The indicator lamp unit 8 is used by inserting the plug 7 into an appropriate power outlet, and the indicator lamp unit 8 has a circuit configuration shown in FIG. It is constructed by integrating electrodes 9, 9 and a display rung 1o consisting of a combination of a pair of light emitting diodes that light up in red and green, respectively, and is assembled into a terminal cock 4. It is something to do.

FIGS. 4(a) and 4(b) show a specific example of the configuration of the end cock with such an indicator lamp 0 unit 8 assembled. The cock body 1 connected to the branch pipe 3 of the water supply system shown in
1 has a structure that includes a communication passage opening/closing valve mechanism 13 which normally serves as a cock, and an indicator lamp unit 8 for displaying water quality.

14 is a water outlet.

The communication passage opening/closing valve mechanism 13 is of a general type, and includes a valve seat 17 that divides and opens and closes the communication passage 15 to the branch pipe 3 and the valve chamber 16, and a valve fixed to the valve seat 17. It is fully equipped with a shaft 8 and a handle 19 for opening and closing the valve seat 17 via the valve shaft 18, and is supported in such a manner that the valve shaft 18 passes through a lid 20 which is screwed and fixed to the cock body 11. There is. Note that 21 is a plug for preventing water leakage, and 22 is a seal/pocket for the same tub.

With such a configuration, when the valve seat 17 is opened/crossed, the water in the one-branch pipe 3 flows through the communication path 15, the valve chamber 16, the electrode tank 23 described below, and then flows out from the outlet 14. It will be leaked.

On the other hand, the indicator lamp unit 8 has a valve chamber 17 and an outlet 14.
A pair of opposing electrodes 9, 9 are inserted and fixed into the electrode sliding part 23 provided between the two, and the case 25 is inserted into the opening screw part 24 of the cock body 11 so that the indicator lamp 10 can be seen from the outside. Can be fixed and assembled.

The case 25 constitutes an electrode boulder, and is integrally formed with the O-IJ ring 26 so that it does not leak out from the electrode holding part, and also prevents water from leaking from the screwed part with the cock body 1. A seal/4' fitting 27 is installed to prevent this.

According to the above configuration, the air conductivity (electrical resistance) of the pair of electrodes: 7L between i9.9 is continuously determined by 6111, and the T!
:; Air conductivity and a predetermined value (for example, cell constant (),
l or o, oi), city 1 intersection + 9r
When the water quality of the water passing through the first part 23 is below the required water level, the display rung 10f, 3: lights up in red, and if the water quality of the water passing through is lower than the required water level, 11 points will be added. Is it your turn? This means that the indicator lamp 10 can be turned on in green.

In the water supply system shown in Figure 1, the treated water is constantly circulated through the main pipe 2, and the end cock 4 at the point where the water is drained is opened to drain the water. When the terminal cock 4 is opened, the indicator lamp 10 lights in red for a while after the corresponding end cock 4 is opened, and then the branch pipe 3
When water approximately equivalent to the amount of water stagnant inside flows out from the outlet, the treated water flowing through the electrode tank section 23 of the terminal cock 4 is immediately led out from the main pipe 2 without stagnant water. Therefore, the quality of the water is the same as that in the main pipe 2, and therefore, as a result of the electrodes 9 measuring the condition, the lighting of the indicator lamp 10 is switched to green.

Therefore, a person who intends to use the treated water confirms that the water flowing out from the corresponding end cock 4 is pure water with the desired water quality by using the green light on the display wrap 10 as an indicator.

can be used.

Note that the gist of the present invention is not limited to the embodiments described above, and various modified embodiments can be considered. For example, as shown in FIG. 5(A) (1 port), the structure of the end cock is changed to a display meter unit 8' for the unit that displays the water quality, and the assembly to the cock body 11 is arranged in a communication path. It may be replaced with the on-off valve mechanism, or the shape and shape of the display rung unit etc.
The materials of the parts used can also be changed depending on the application, for example! The poles are rod-shaped, plate-shaped, ring-shaped, concentric bipolar rods, and the material of the dispersion member is polyethylene, nylon,
Materials with good corrosion resistance and workability such as A, B, S, polyzolopyrene, P, V, and C may be used as appropriate.

Furthermore, if the treated water used is ultrapure water,
Considering the influence of measurement errors, it is also effective to use a shohaioke sensor.

As described above, the water quality control system for a pure water supply system according to the present invention is equipped with a monitor for each end cock (or valve) to set and display the quality of the water flowing through the water as 4 conductivity. However, this makes it possible for the individual end cock (or valve) to check and manage the quality of the water used by the person making the water, and as a result, the concentration of water in one The system with pure water treatment and ν-sized water supply pipes has the advantage of being able to conveniently distribute water to multiple locations, and is especially useful in facilities where it is difficult to use the main pipe as a circulation system. It is something that can demonstrate its effectiveness.

[Brief explanation of the drawing]

The drawings show the embodiment of the present invention, and Fig. 1 shows the overall outline of the water supply system, Fig. 2 shows the power adapter of the company's water quality display monitor, (A is an external view, and (B) is a circuit diagram. Fig. 3 shows the display lamp unit of the same Mizuga narrow display monitor, (a) is an external view, and (b) is a circuit diagram. Fig. 4 shows an example of the configuration of the terminal cock, and (i) ) is a vertical cross-sectional view, ←
) ( is a front view, Figure 5 shows another example of the configuration of the terminal cock, (a) is a longitudinal sectional view, and (b) is a front view of the meter. 3: Branch pipe 4: Terminal cock 5: Scale side adapter 6: Cable 7: Plug 8: Display lamp unit 1.8': Display meter unit 9: Electrode 1o: Display lamp 10': Notification meter 11 = Cock Main body 12: Continuation threaded part 13 near; I! circuit on-off valve Ip structure 14: Outlet 15: Communication passage 16: Valve chamber 17: Valve seat 18: Valve stem 19: Handle 20: Lid 21: Nogutsukifugu 22 : Seal nogging 23: Electrode tank part 24: Opening screw part 25: Case
26: O-ring 27: Sealing ring

Claims (2)

[Claims] (1) In a pure water supply system in which a water supply source, a pure water device, is connected via a long water pipe to a plurality of terminal pulps or cocks, electrical conduction of water through each of the terminal pulps or cocks indicated by MjJ is conducted. A water quality control system for a pure water supply system, characterized by being equipped with a monitor that measures the rate and displays it digitally or analogously. (2) A patent claim characterized in that a long water pipe constitutes a circulation system that condenses water into a water purifier, and each terminal pulp or cock is connected to a branch from the circulation system pipe line. A water quality management system for a pure water supply system as described in scope (1).