JPH0236312B2 - JUNSUISOSUIKEINOSUISHITSUKANRISHISUTEMU - Google Patents

Description

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

Traditionally, in research laboratories, laboratories, testing rooms, electronic industries, pharmaceutical industries, etc., it has been necessary to install a deionized water device to perform deionized water treatment in each place where deionized water (or ultrapure water: hereinafter omitted) is used. Alternatively, a system is adopted in which concentrated treatment is performed using a deionizer at one location, and the treated deionized water is sent via water pipes to end valves or cots 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 deionizer 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. This is advantageous, but on the other hand, it is difficult to avoid making the water supply pipe long, which may cause the treated water sent from the water purifier to be affected by contamination in the water supply pipe or branch pipe. This tendency becomes more pronounced when the residence time in the pipe 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 not possible to fully grasp 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. In some cases, there may be doubts about the reliability of inspection results, etc., and in production-related cases, this may lead to an increase in the defective rate of products.

The present inventor has conducted various studies based on these problems, and has found that the deterioration in the quality of treated water in the water supply system, which is a problem with the above-mentioned centralized treatment method that is advantageous in terms of equipment, is mainly caused by the problem in the water supply system. It is understood that the cause is that treated water stagnates in the road for a long time, and as a result, CO ₂ dissolves in it or impurities elute from the pipes. This treated water can be used after the water is blown and drained without being used as service water, and the water supply system is turned on and water that satisfies the required water quality flows out from the terminal valve or pot. The present invention was conceived based on the idea that the problems of the above-mentioned centralized processing method could be substantially solved by doing so.

In order to measure and manage the water quality of the water flowing out from these end valves or kettles, it is possible to directly observe the electrical conductivity of each end valve or kettle using an electrode that protrudes into the water channel through which it passes. However, management using this electrical conductivity as an index also has the advantage of indirectly dealing with contamination caused by bacteria, substances eluted from piping, etc. In other words, these contaminants become a particular problem when they accumulate, so if you blow and drain the accumulated water using the electrical conductivity as a management index, the contaminated water will also be blown away. be.

The gist of the present invention is, in a pure water water supply system that is connected to a plurality of terminal valves or sockets via long water pipes from a pure water device serving as a water supply source, to each of the terminal valves or sockets, 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 passing water and displays it digitally or analogously.

The present invention is applicable to either a closed main pipe circulation type where the water supply system circulates the treated water sent from the water purification device back to the water purification device, or an open type non-circulation type. Although applicable, it is particularly effective in the latter case. In other words, in the former type, water is constantly allowed to flow in the main pipe, and stagnation can be limited to pipes branched from the main pipe to end valves, etc., and water must be blown and drained before use. The amount of water is always constant and can be relatively small, but in the latter type, it depends on the distance from the pure water device such as the end valve, the usage status of other end valves, etc. Therefore, the amount of water to be blown and drained is not constant, and especially when using the end valve that is farthest from the water purification device, there is no guideline for necessary and sufficient blowing and draining without the water quality monitor of the present invention. This is because there is no such thing at all, resulting in a situation called blind driving.

In addition, the monitor attached to each end valve or kettle will turn on a lamp or switch off the lamp when the electrical conductivity measured by an electrode protruding into the waterway passing through falls below a predetermined value. In addition to a format that switches the lighting from red to green (digital display), a format that displays the measured value with a meter (analog display) may also be used.
Alternatively, it may be placed nearby.

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

Figure 1 shows a main pipe 2 in which treated water sent from a pure water device 1 is condensed and circulated.
The figure shows a closed type water supply system with a main pipe 2 and branch pipes 3, as many as necessary.
3, 3... are connected and connected to terminal faucets 4, 4, 4..., respectively.

Such water supply systems are used for cleaning processes in research laboratories, examination rooms, laboratories, and the electronics industry, etc. As pure water equipment, they include water quality display devices, coarse filtration, and dechlorination using activated carbon. ,Mixbet pure water equipment, reverse osmosis equipment, ultrafiltration equipment,
By combining microfilters, ultraviolet sterilizers, etc., a water treatment system can be configured to obtain water quality at an appropriate level.

In such a water supply system, treated water is always circulated from the water purifier 1 through the circulating main pipe 2,
By opening the end tap 4 at the required location, the treated water can flow out and be used.At this time, the water quality is thought to be decreasing due to stagnation in the branch pipe 3. As already mentioned, if this amount of water is blown away and drained when the tap is opened, the quality of the outflow water will be in a favorable condition after that.

In order to measure and display the water quality of the water flowing out from this terminal pot 4, each terminal pot 4, 4,
4...The present invention is characterized by the fact that a water quality display monitor, which will be described later, is attached to each of them, and in this example,
The power supply side adapter 5 constitutes a water quality display monitor by the power supply side adapter 5 having a built-in circuit shown in FIG. The display lamp unit 8 has a circuit configuration shown in FIG. and an indicator lamp 10 consisting of a combination of a pair of light emitting diodes that light up in red and green, respectively, are integrated into an integrated unit, and this is assembled and used by being embedded in the terminal socket 4.

Figures 4A and 4B show a specific example of the configuration of the terminal socket with such an indicator lamp unit 8 assembled, and the water supply pipe shown in Figure 1 can be connected by the water supply pipe connection screw 12. A pot main body 11 connected to a water system branch pipe 3 has a structure that includes a communication passage opening/closing valve mechanism 13, which is normally used as a pot, and an indicator lamp unit 8 for indicating water quality. 1
4 is a water outlet.

The communication passage opening/closing valve mechanism 13 is a general type, and includes a valve seat 17 that divides and opens and closes between the communication passage 15 to the branch pipe 3 and the valve chamber 16, and a valve shaft fixed to the valve seat 17. 18, 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 pot body 11. In addition, 21 is packing to prevent water leakage,
22 is a similar seal packing.

With such a configuration, when the valve seat 17 is opened, water from the branch pipe line 3 flows through the communication path 15,
The valve chamber 16 then flows out from the outlet 14 via the electrode tank section 23, which will be described below.

On the other hand, the indicator lamp unit 8 has a pair of opposing electrodes 9, 9 inserted and fixed into an electrode tank section 23 provided between the valve chamber 17 and the outlet 14, and an indicator lamp 10 that is visible from the outside. , that case 2
5 is screwed and fixed to the open threaded portion 24 of the main body 11 to be assembled.

The case 25 serves as an electrode holder, and is O-
It is integrally formed including the ring 26, and a seal packing 27 is attached to prevent water from leaking from the screwed part with the main body 11.

With the above configuration, the electrical conductivity (electrical resistance) between the pair of electrodes 9, 9 is continuously measured, and the electrical conductivity is compared with a predetermined value (for example, the cell constant is 0.1 or 0.01). Therefore, when the quality of water passing through the electrode tank section 23 is below the required level, the indicator lamp 10 is lit in red, and when the quality of the water passing through satisfies the required level, the indicator lamp 10 is lit in green. This means that you can do it.

In the water supply system shown in Fig. 1, treated water is constantly circulated through the main pipe 2, and when the end tap 4 at a desired location is opened to allow water to flow out, the corresponding end The indicator lamp 10 lights up in red before the tap 4 is opened and for a while after the tap is opened, and after that, the amount of water approximately equivalent to the amount of water accumulated in the branch pipe 3 reaches the outflow port. When flowing out, the treated water passes through the electrode tank part 23 of the terminal pot 4,
The water is immediately introduced from the main pipe 2 without accumulation, and its quality is the same as that in the main pipe 2. Therefore, as a result of the electrodes 9 measuring its condition, the indicator lamp 10 The light will change to green. For this reason, a person who intends to use the treated water confirms that the water flowing out from the corresponding end tank 4 is pure water with the desired water quality by using the green light on the display lap 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 FIGS. 5A and 5B, in the structure of the terminal pot, the unit for displaying water quality is changed to the display meter unit 8', and the assembly arrangement relative to the pot body 11 is replaced with a communication passage opening/closing valve mechanism. The shape of the indicator lamp unit etc. and the material of the parts used can be changed depending on the application.For example, the electrode can be shaped like a rod, plate, ring, or concentric two.
The pole rod and the material of the parts in contact with the liquid can be made of polyethylene,
Materials with good corrosion resistance and workability, such as nylon, ABS, polypropylene, and PVC, may be used as appropriate.

Furthermore, when the treated water used is ultrapure water, it is also effective to use a temperature correction sensor in consideration of the influence of measurement errors.

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 valve (or valve) to measure and display the quality of the water passing through it as electrical conductivity. This allows the individual terminal caps (or valves)
As a result, by centralizing pure water treatment in one place and using a system with long water pipes, it is possible to check and manage the quality of the water used by the operator. There is an advantage in that water distribution is realized in a suitable manner, and the above-mentioned excellent effects can be exhibited especially in facilities where it is difficult to use the main pipe as a circulation system.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is an overall schematic diagram of a water supply system, FIG. 2 is a power adapter for a water quality display monitor, A is an external view, and B is a circuit diagram. Figure 3 shows the indicator lamp unit of the same water quality display monitor, with A being an external view and B being a circuit diagram. Figure 4 shows an example of the configuration of the terminal tip, where A is a longitudinal sectional view and B is a front view. Figure 5 shows another example of the configuration of the terminal tip, A is a longitudinal sectional view, and B is a front view of the meter It is. 1: Pure water equipment, 2: Main pipe, 3: Branch pipe,
4: Terminal socket, 5: Power supply side adapter, 6: Cable, 7: Plug, 8: Display lamp unit,
8': Display meter unit, 9: Electrode, 10:
Display lamp, 10': Display meter, 11: Kotoku body, 12: Connection thread, 13: Communication passage opening/closing valve mechanism, 14: Outlet, 15: Communication passage, 16: Valve chamber, 17: Valve seat, 18: Valve stem, 19: Handle, 20: Lid, 21: Packing, 22: Seal packing, 23: Electrode tank section, 24: Opening thread section, 25: Case, 26: O-ring, 27: Seal packing.

Claims (1)

[Scope of Claims] 1. In a pure water supply system that is connected to a plurality of terminal valves or sockets via a long water pipe from a pure water device serving as a water supply source, water that passes through each of the terminal valves or sockets A water quality control system for a pure water supply system characterized by being equipped with a monitor that measures the electrical conductivity of water and displays it digitally or analogously. 2. Claims characterized in that a long water pipe constitutes a circulation system for condensing water into a water purifier, and each end valve or socket 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 item 1.