JPS5935534Y2 - Water leak detection device for ozone generator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water leakage detection device attached to an ozone generator to detect leakage of cooling water, etc.

As shown in Fig. 1, this type of ozone generator has a raw material air chamber 3 and an ozonization chamber 4 on both sides, and a cooling water chamber in the center using partition plates 2, 2 installed vertically inside a tank 1. 5, and the raw material air chamber 3 and the ozonization chamber 4 are connected by a stainless steel vibro, and a glass tube 8 containing an ozone generator 7 is inserted into the stainless steel vibro. There is.

The tank 1, partition plate 2, and stainless steel vibro are joined to each other by welding means, and if there is a defect in the welding means,
If the cooling water in the cooling water chamber 5 leaks, water may accumulate in the tank 1 and cause a short circuit between the discharge tube high voltage electrode section and the tank 1.

In addition, the air supplied to the raw material air chamber 3 is supplied to an air dryer (
(not shown) to lower the dew point and increase the efficiency of ozone generation. However, if the air drying device malfunctions, the moisture contained in the air will condense on the wall surface, and water droplets will be generated. It reacts with NOx generated inside the tank and turns into nitric acid, corroding the pipes inside the tank and causing accidents to the processing system.

Furthermore, water may accumulate in the ozonization chamber 4 due to backflow from the treatment system, and in such a case, the water droplets may become NOx.
The above-mentioned accident occurs as a result of this reaction.

Therefore, water leak detection devices 9, 9 are provided in the raw material air chamber 3 and the ozonization chamber 4 of the ozone generator, respectively, to protect the ozone generator and the processing system.

The water leak detection device 9 has a water droplet receptacle body 11 having a conical water droplet focusing surface 10, and an O-ring 1 attached to the water droplet receptacle body 11.
The screw plug 13 for inspection is screwed onto the screw plug 13 through the screw plug 13, and an electrode 14 and a conductivity cell 15 are fixedly attached to the screw plug 13 by an electrode part 16.

The electrode 14 is connected to a control device (not shown) via a plug 17 inserted into the screw plug 13 and a lead wire 18.

The water drip tray body 11 and the inspection plug 13 are as follows:
They are made of transparent synthetic resin materials such as acrylic or vinyl chloride, and are visible to the naked eye.

The water leak detection device 9 is screwed onto flanges provided on mounting portions 3a and 4a that protrude downward from the lower surfaces of the raw material air chamber 3 and the ozonization chamber 4 of the tank 1 via push plates.

However, in the above-mentioned type of water leak detection device, the body and screw-in plug of the water drip tray are molded from synthetic resin, so
If they are exposed to ozone-containing air for a long time, they can crack, and although they must be made thicker to increase their strength, they are not very effective in preventing cracks.

Furthermore, forming a conical surface on the body of the water drip tray has the disadvantage that the shape becomes complicated and that other foreign matter may get mixed in and cut off the power supply to the ozone generator.

The present invention was developed in view of the above-mentioned points.The detection part is made of a metal material to strengthen ozone resistance, and the installation is made with screws to simplify handling. The purpose is to provide a detection device.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, reference numeral 20 denotes a water droplet body, and the water droplet body 20 is made of mild steel and has a screw 21 formed on its inner peripheral surface.

The water droplet tray body 20 is screwed onto a mounting portion 3a protruding from the lower surface of the tank 1.

In the water drip tray, an electrode 23 is disposed in the internal space provided in the body 20 via an insulating cap 22.
A sealing material 2 having a tapered surface 24 so as to cover the periphery of 3.
5 is provided.

The sealing material 25 comes into contact with the end surface of the attachment part 3a when the water droplet tray body 20 is screwed onto the attachment part 3a, and prevents air leakage from inside the ozone generator.
3 from the ozone generator.

Since the sealing material 25 is directly exposed to ozone, it is made of Teflon, Python, EPT, or fluororubber, which have high ozone resistance.

Further, the electrode 23 is also made of stainless steel in consideration of ozone resistance.

On the other hand, a foreign matter prevention net 26 is disposed inside the mounting portion 3a, and a support body 27 connected to the foreign matter prevention net 26 is supported in contact with the upper surface of the sealing material 25.

Further, the electrode 23 has a water droplet receptacle provided in the hole 28 provided in the body 20.
One end of the lead wire 29 is connected through the lead wire 29, and the other end of the lead wire 29 is connected to the control device.

The above-mentioned control device is a liquid level controller of product type 61F-G1, and its circuit diagram is shown in FIG.

Therefore, AC 200 is applied between terminals A and B of the liquid level controller 40.
When V is applied, the power transformer 41 causes 24
A voltage of V and 8 is generated, and the diodes 42a, 42b
Half-wave rectification of alternating current is performed.

Also, if terminals D-C and D-F are not connected, the rectifier 43
8■ voltage is not applied to the AC side of relays X1. No DC voltage is applied across the coil of relay X2, and relay X1. Relay X2 is inactive.

Next, a water leak occurs in the tank 1, and water droplets flow into the lower part of the tank 1, pass through the sealing material 24, and reach the electrode 33, as shown in FIG. The terminals DC and DF of the liquid level controller 40 are electrically connected.

Then, a voltage of 8■ is applied to the AC side of the rectifiers 43a, 43b, a DC voltage is generated, and the transistors 44a, 44
A voltage is applied to the base of transistors 44a, 4
4b is turned on, voltage is applied across the coils of relays X1 and X2, and relays X1 and X2 are energized.

The above relay X1. When relay X2 is energized, the contacts of relay X1 and relay X2 close, conduction occurs between terminals G-H and J- connected to the alarm circuit, the alarm is activated, and the ozone generator power is cut off. be done.

FIGS. 6 and 7 show other embodiments of the present invention. In the embodiment shown in FIG.
A flange 52 corresponding to the above-mentioned flange 50 is provided at the upper end of 1, and both flanges 50 and 52 are joined and bolts 5
It is fixed by 3.

Further, in the embodiment shown in FIG.
The insulator 61 has a screw seat 62 on its outer surface and is screwed onto a threaded boss 64 via a sealing gasket 63.

The threaded boss 64 is attached to the attachment portion 3a by welding means.

The threaded boss 64 and screw seat 62 are made of stainless steel because they are exposed to ozone.

Further, the sealing gasket 63 is also made of ozone-resistant rubber such as Teflon.

A lead wire 66 is connected to the end of the electrode 60 via a tightening nut 65.

As described above, according to the present invention, the detection part has enhanced ozone resistance, can be easily attached to and removed from the ozone generator, and is free from foreign substances* (conductive substances) inside the ozone generator. Even if there is an inflow, there will be no malfunction due to it.
Moreover, it has the effect of preventing adverse effects on the ozone generator and treatment system.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an ozone generator, Fig. 2 is a cross-sectional view of a part of a conventional water leak detection device, and Fig. 3 is a cross-sectional view of a part of the water leak detection device of the present invention. Figure 4 is the same plan view,
Figure 5 is a circuit diagram of the control device of the present invention, Figures 6 to 7
The figure shows another embodiment of the present invention. 20... Water droplet tray is body, 21... Screw, 23... Electrode, 24... Tapered surface, 25... Sealing material, 26...
...Foreign object prevention net, 27...Support.

Claims (1)

[Scope of utility model registration request] In a water leak detection device for an ozone generator that is attached to a protrusion that extends downward from the raw air chamber and ozonization chamber of the ozone generator main body, a foreign matter prevention net is stretched within the said projection, and the foreign matter contamination prevention net is An electrode is placed below the protrusion through a sealing material, and a water droplet tray made of an ozone-resistant material is screwed onto the open end of the protrusion, and the sealing material is brought into contact with the protrusion end to seal it. A water leak detection device for an ozone generator, characterized in that: