KR20170075941A - Discharge tube for generating ozone - Google Patents

Discharge tube for generating ozone Download PDF

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Publication number
KR20170075941A
KR20170075941A KR1020150185539A KR20150185539A KR20170075941A KR 20170075941 A KR20170075941 A KR 20170075941A KR 1020150185539 A KR1020150185539 A KR 1020150185539A KR 20150185539 A KR20150185539 A KR 20150185539A KR 20170075941 A KR20170075941 A KR 20170075941A
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KR
South Korea
Prior art keywords
metal
metal cover
dielectric layer
tube
cover
Prior art date
Application number
KR1020150185539A
Other languages
Korean (ko)
Inventor
조국희
홍도관
김종욱
장석훈
조한구
Original Assignee
한국전기연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 한국전기연구원 filed Critical 한국전기연구원
Priority to KR1020150185539A priority Critical patent/KR20170075941A/en
Publication of KR20170075941A publication Critical patent/KR20170075941A/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/10—Preparation of ozone
    • C01B13/11—Preparation of ozone by electric discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2201/00—Preparation of ozone by electrical discharge
    • C01B2201/10—Dischargers used for production of ozone
    • C01B2201/14—Concentric/tubular dischargers

Abstract

The present invention relates to a discharge tube for generating ozone, and more particularly, because a metallic cover is simply screwed to both ends of a metal tube, welding work is not required and an air flow hole for welding is not required. To an improved discharge tube for generating ozone.
According to the present invention, there is provided a plasma display panel comprising: a metal tube connected to a power source and serving as an internal electrode; a metal cover provided at both ends of the metal tube; and a dielectric layer coated on the outer surface of the metal tube and the metal cover, A discharge tube for ozone generation, wherein the metal cover is screwed to both ends of the metal tube to exclude an air flow hole required for the metal cover when welding between the metal cover and the metal tube. It is technically essential.

Description

Discharge tube for generating ozone [

The present invention relates to a discharge tube for generating ozone, and more particularly, because a metal cover is simply screwed to both ends of a metal pipe, welding work is not required and an air flow hole for welding is not required, To an improved discharge tube for generating ozone.

Generally, a discharge tube for generating ozone is an apparatus for generating ozone which is used for purposes of water treatment, wastewater treatment, manure and wastewater treatment, heavy water treatment, cooling tower, swimming pool, and industrial use.

That is, the discharge tube for generating ozone is formed by the silent discharge generated between the inner electrode and the outer electrode when the power is applied in the process of flowing air between the outer electrode and the inner electrode, After the oxygen molecules are partially decomposed into oxygen atoms by the electrons, the decomposed oxygen atoms combine with oxygen molecules that are not decomposed to generate ozone.

The ceramic discharge tube for generating ozone is composed of a cylindrical metal tube serving as an internal electrode, a metal cover provided at both ends of the metal tube, and a dielectric layer coated on the outer surface of the metal tube and the metal cover.

However, the conventional ceramic discharge tube for generating ozone is welded to both ends of the metal cover by welding to the metal cover. In other words, it is not easy to join the metal pipe and the metal cover due to the welding process, and after the completion of the welding, in order to remove the stress generated in the welding part by welding, a polishing process for smoothly finishing the welding part together with the heat treatment is separately required. There is a falling problem.

When the dielectric layer is coated on the outer surface of the metal tube and the metal cover and then heated to a high temperature for surface roughness, there is a fear that a defect occurs in the welded portion. Further, when a voltage is applied to a metal pipe serving as an internal electrode, there is also a problem that cracks are generated in the dielectric layer coated around the welded portion while the welded portion acts as a resistance.

In addition, there is a problem that an air flow hole is formed separately in a metal cover in order to prevent a weld edge from being welded on the welded portion while air is expanded due to heat generated when welding the metal pipe and the metal cover.

Meanwhile, since an air flow hole is separately formed in the metal cover for suppressing the occurrence of welding bubbles, a part of the air to be passed between the metal pipe and the external electrode flows into the air flow hole, thereby reducing the efficiency of generating ozone.

Therefore, in order to solve the problems caused by the air flow holes formed in the metal cover as described above, it is necessary to improve the coupling structure that can couple the metal curves to both ends of the metal pipe without welding.

Korean Patent Laid-Open Publication No. 10-2004-0033782, April 24, 2004.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a method of manufacturing a metal pipe, which is capable of reducing the manufacturing efficiency due to the welded structure between the metal pipe and the metal cover, And an object of the present invention is to provide a ceramic discharge tube for generating ozone to which a metal cover is screwed.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

According to an aspect of the present invention, there is provided a discharge tube for generating ozone, comprising: a metal tube connected to a power source and serving as an internal electrode; a metal cover installed at both ends of the metal tube; and a dielectric layer coated on an outer surface of the metal tube and the metal cover. A discharge tube for generating ozone, the metal cover being screwed to both ends of the metal pipe to exclude an air flow hole required for the metal cover when welding between the metal cover and the metal pipe, .

Wherein an inner diameter of the metal cover is reduced and an inner circumferential surface of the inner circumferential surface of the metal cover is formed with a female thread corresponding to the male screw, .

A first dielectric layer made of a ceramic material, the dielectric layer being coated on the outer surface of the metal tube and the metal cover to have a predetermined thickness and including a binder for bonding the metal tube to the metal cover; A second dielectric layer coated on the outer surface of the first dielectric layer to a predetermined thickness and made of a metal oxide material; And a third dielectric layer made of a ceramic material coated on the outer surface of the second dielectric layer to a predetermined thickness.

The ceramic material is one of enamel, quartz, porcelain, borosilicate glass, and zirconia.

And the dielectric layer is coated with the metal tube and the metal cover separated from each other.

The dielectric layer coated on the outer surface of the metal tube is formed by spraying the coating material toward the outer surface in the process of rotating the metal tube in one direction and moving along the longitudinal direction.

The dielectric layer coated on the outer surface of the metal cover is formed by spraying the coating material toward the outer surface in the process of the metal cover being rotated in one direction and moving along the width direction.

Since the metal cover installed at both ends of the metal tube is fixedly installed in a screw-type manner, the air flow hole required for the conventional welded structure can be eliminated, thereby improving manufacturing easiness and durability. And can enhance ozone generation function.

1 is a use state of a discharge tube for generating ozone according to a preferred embodiment of the present invention.
FIG. 2 is a view showing a separation between a metal tube and a metal cover of a discharge tube for generating ozone according to a preferred embodiment of the present invention. FIG.
3 is a sectional view taken along the line "AA" in Fig.

The discharge tube for generating ozone according to the present invention is a discharge tube for generating ozone, which is used for purifying water, wastewater, manure and wastewater, heavy water treatment, cooling tower, swimming pool, industrial use, Lt; / RTI >

Particularly, the discharge tube for generating ozone according to the present invention is characterized in that the manufacturing efficiency is improved by simplifying the manufacturing process and improving the manufacturing easiness, the service life is increased by increasing the durability, and the ozone generating function is improved.

This feature is achieved by a structure in which a metal cover is installed on both ends of a metal cover in a screwed manner in a structure composed of a metal pipe, a metal cover provided at both ends of the metal pipe, and a dielectric layer coated on the outer surface of the metal pipe and the metal cover .

That is, unlike the conventional discharge tube for generating ozone, the metal tube and the metal cover are not welded but are nipped by a female screw and a male screw so that the air flow hole required for the metal cover is excluded due to the conventional welding.

Therefore, the metal pipe and the metal cover can be easily joined without welding, and no post-treatment after welding is required. It is not necessary to form the air flow hole in the metal cover for suppressing the welding bubbles generated at the time of welding. In addition, when the dielectric layer is coated, there is no fear of defects in the joint between the metal pipe and the metal cover, and the ozone generating function can be greatly improved because no air flows into the metal pipe.

Hereinafter, the structure and operation of a discharge tube for generating ozone according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a discharge tube for generating ozone according to a preferred embodiment of the present invention will be described.

1, the discharge tube 100 for generating ozone according to the preferred embodiment of the present invention is provided inside the external electrode 200 to supply the external electrode 200 with the air, The metal cover 10, the metal cover 20, and the dielectric layer 30 to generate ozone.

The metal tube 10 is an internal electrode.

For this purpose, the metal tube 10 is made of a metal material (for example, SUS304) flowing in a tube shape having a predetermined diameter and a length (for example, an inner diameter: 40 to 50 mm, an outer diameter: 55 to 65 mm, And is disposed inside the external electrode 200 serving as a ground electrode. The metal tube 10 and the external electrode 200 are connected to both ends of the power source 300, respectively.

However, the metal tube 10 requires a connection terminal 40 for connection with the power source 300, which is installed at an end of a metal cover 20 to be described later. Accordingly, the current of the power source 300 flows through the connection terminal 40 to the metal pipe 10 and the metal cover 20 to be described later.

On both sides of the metal pipe 10, a screw coupling means is provided so that a metal cover 20, which will be described later, can be installed in a screw connection manner. That is, at both ends of the metal tube 10, as shown in FIG. 2, a receiving portion 11, which is annularly formed on the inner peripheral surface of the metal cover 10, is protruded to screw the metal cover 20 to be described later.

The metal cover 20 is configured to seal the interior of the metal tube 10.

The metal cover 20 has the same thickness as the metal pipe 10 and is formed of a metal material (for example, SUS304) through which current flows. The metal cover 20 is formed of a pair of two metal pipes and is installed at both ends of the metal pipe 10. The metal cover 20 has a first end connected to the metal tube 10 and a second end connected to the metal tube 10 so as to smoothly pass the airflow between the metal tube 10 and the external electrode 200, And is formed as a curved surface.

At this time, one end of the metal cover 20 is provided with screwing means so as to be installed at both ends of the metal pipe 10 in a screwing manner. That is, at one end of the metal cover 20, as shown in FIG. 2, an insertion portion 21 is formed in which the male screw 22 is arranged on the outer circumferential surface so as to correspond to the housing portion 11 of the metal cover 20.

Therefore, when the metal cover 20 is installed at both ends of the metal tube 10, the insertion portion 21 of the metal cover 20 and the receiving portion 11 of the metal tube 10 are screwed It is not necessary to form the air flow holes in the metal cover 20 necessary for the welding connection method. As a result, it is possible to prevent deterioration of manufacturing efficiency, durability, ozone generating function and the like due to the air circulation hole and the welding operation.

Here, hermetic means (not shown) such as an O-ring may be installed between the metal pipe 10 and the metal cover 20 so as to keep the inner space of the metal pipe 10 and the metal cover 20 hermetic. It is preferable that the airtight means is provided between the metal tube 10 and the metal cover 20 by press-fitting according to the screwing of the metal tube 10 and the metal cover 20.

The dielectric layer 30 is formed by insulating the metal tube 10 and the metal cover 20 such that an electric silent discharge occurs when the air passes between the external electrode 200 and the metal tube 10 serving as the internal electrode to be.

To this end, the dielectric layer 30 is coated on the outer surfaces of the metal tube 10 and the metal cover 20 as shown in FIG. At this time, the dielectric layer 30 is coated with a plurality of layers so that the metal tube 10 and the metal cover 20 are reliably insulated and durability to withstand the heat generated by the electrostatic discharge.

3, a dielectric layer 30 is formed on the outer surface of the metal tube 10 and the metal cover 20 to have a predetermined thickness (for example, 1 to 2 mm) A second dielectric layer 32 formed on the outer surface of the first dielectric layer 31 to have a predetermined thickness (e.g., 2 to 4 mm) and a second dielectric layer 32 formed on the outer surface of the second dielectric layer 32 to have a predetermined thickness (E.g., 1 to 2 mm).

The first dielectric layer 31 is made of an adhesive ceramic material (for example, a mixture of nickel and aluminum powder) containing a binder having high adhesiveness so that the first dielectric layer 31 can be firmly fixed to the outer surface of the metal tube 10 and the metal cover 20 Adhesive ceramic). The second dielectric layer 32 is made of a metal oxide material (for example, high purity aluminum oxide having a purity of 99.5% or more), and the third dielectric layer 33 is made of a ceramic material.

On the other hand, the ceramic material constituting the first dielectric layer 31 and the third dielectric layer 33 may be composed of an enamel, quartz, porcelain, borosilicate glass, or zirconia Or it may consist of a mixture of two or more of the above configurations.

Here, the enamel is formed by baking the outer surface of the metal pipe (10) and the metal cover (20) by the wet method, and then baking the oil of the emulsifier several times.

Unlike other minerals, quartz is chemically very pure and has almost no splitting, so it has good durability. The porcelain has a small discoloration and resistance to abrasion, which is advantageous in durability.

Borosilicate glass is made of boric acid and silicic acid and is suitable for mass production and has a thermal expansion coefficient of about 1/3 of that of ordinary glass, and is a low-expansion glass having a low cost and durability. Zirconia is very strong in ceramics and has a strong durability because it can withstand rapid temperature changes.

Since the shape of the metal tube 10 and the metal cover 20 are different from each other and the directions of coating are also different from each other, the dielectric layer 30 may be coated with the metal tube 10 and the metal cover 20 separately, .

However, when the dielectric layer 30 is formed on the metal tube 10, the metal tube 10 is rotated in one direction and the coating material is sprayed toward the outer surface of the metal tube 10 in a process of slowly moving the metal tube 10 in the longitudinal direction desirable.

When the dielectric layer 30 is formed on the metal cover 20, the metal cover 20 is rotated in one direction and sprayed toward the outer surface of the metal cover 20 in a process of slowly moving up and down in the width direction .

Next, a manufacturing process of a discharge tube for generating ozone according to a preferred embodiment of the present invention will be described in detail.

First, a stainless steel tube (SUS 304) was cut and ground to produce a metal tube 10 having a length of 330 mm, an outer diameter of 45 mm and an inner diameter of 53 mm, and a stainless steel plate (SUS 304) Thereby forming a metal cover 20 of 8 mm.

The inner side of both ends of the metal tube 10 is tapped to 30 mm to form a receiving portion 11 having a female screw 12 formed on its inner circumferential surface and an outer side of one end of the metal cover 20 is tapped 30 mm, Thereby forming the inserted portion 21 formed.

After the accommodating portion 11 is formed in the metal tube 10 and the inserting portion 21 is formed in the metal cover 20 as described above, the dielectric layer 30 is formed on the outer surface of the metal tube 10 and the metal cover 20 . At this time, when the dielectric layer 30 is formed, the metal tube 10 and the metal cover 20 are separated from each other in a state of being separated in order to make the thickness uniform.

Before the dielectric layer 30 is formed on the outer surface of the metal tube 10 and the metal cover 20, the metal tube 10 and the metal cover 20 should be removed from the outer surface.

Then, the adhesive ceramic material containing the binder is coated on the outer surface of the metal tube 10 and the metal cover 20 to a thickness of 1 mm to form the first dielectric layer 31. Then, the outer surface of the first dielectric layer 31 is coated with a metal oxide material, and then the surface of the second dielectric layer 32 is polished with a surface roughness of 5 to 6 to form the second dielectric layer 32. Finally, the outer surface of the second dielectric layer 32 is coated with an organic ceramic material, and then heated to 850 DEG C in an electric furnace and fired to form a third dielectric layer 33 to increase the surface roughness.

At this time, the metal tube 10 sequentially forms the first dielectric layer 31, the second dielectric layer 32, and the third dielectric layer 33 by sequentially spraying the materials while rotating at a low speed with the longitudinal direction as a rotation axis.

Then, the metal cover 20 sequentially forms the first dielectric layer 31, the second dielectric layer 32, and the third dielectric layer 33 by sequentially spraying the materials while reciprocating at a low speed up and down.

The metal cover 20 may be firmly screwed on both ends of the metal tube 10 by using the receiving portion 11 of the metal tube 10 and the inserting portion 21 of the metal cover 20 .

In this case, since welding is not applied, there is no need for a grinding operation for smoothing the joint between the metal tube 10 and the metal cover 20 and a heat treatment for removing the stress caused by the welding heat.

The ozone generating discharge tube 100 manufactured as described above is excellent in adhesiveness between the metal and the ceramic and has a high permittivity because the dielectric layer 30 is formed in triple on the outer surface of the metal tube 10 and the metal cover 20 As the furnace is heated and fired at a high temperature in the electric furnace, the surface roughness is high and the durability is also excellent.

The above-described embodiments are merely illustrative, and various modifications may be made by those skilled in the art without departing from the scope of the present invention.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also various other modified embodiments according to the technical idea of the invention described in the following claims.

10: Metal tube
11:
12: Female threads
20: Metal cover
21:
22: Male thread
30: Dielectric layer
31: First dielectric layer
32: second dielectric layer
33: Third dielectric layer
40: Connection terminal
100: discharge tube
200: external electrode
300: Power supply

Claims (7)

A metal cover which is connected to a power source and serves as an inner electrode, a metal cover which is installed at both ends of the metal tube, and a discharge tube for generating ozone, which is provided inside the outer electrode which is grounded and comprises a metal tube and a dielectric layer coated on the outer surface of the metal cover As a result,
The metal cover
Wherein the metal cover is screwed to both ends of the metal pipe to exclude an air flow hole required for the metal cover when welding between the metal cover and the metal pipe. The method according to claim 1,
At the end of the metal cover
An insertion portion having an outer diameter reduced and formed with an externally threaded portion is protruded,
On both inner peripheral surfaces of the metal tube
And a receiving portion formed with an internal thread corresponding to the male screw is formed on an inner circumferential surface of the discharge tube and is screwed to the insertion portion. The method according to claim 1,
The dielectric layer
A first dielectric layer made of a ceramic material and coated with a predetermined thickness on an outer surface of the metal tube and the metal cover and including a binder for bonding the metal tube and the metal cover;
A second dielectric layer coated on the outer surface of the first dielectric layer to a predetermined thickness and made of a metal oxide material; And
And a third dielectric layer coated on the outer surface of the second dielectric layer to a predetermined thickness and made of a ceramic material. The method of claim 3,
The ceramic material
Wherein the discharge tube is one of enamel, quartz, porcelain, borosilicate glass, and zirconia. The method according to claim 1,
The dielectric layer
Wherein the metal tube and the metal cover are separated from each other. 6. The method of claim 5,
The dielectric layer coated on the outer surface of the metal tube
Wherein a coating material is sprayed toward an outer surface of the metal tube in a process of rotating the metal tube in one direction and moving along the longitudinal direction. 6. The method of claim 5,
The dielectric layer coated on the outer surface of the metal cover
Wherein the metal cover is formed by spraying a coating material toward the outer surface in a process of rotating the metal cover in one direction and moving along the width direction.



KR1020150185539A 2015-12-24 2015-12-24 Discharge tube for generating ozone KR20170075941A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102439351B1 (en) 2022-02-10 2022-09-01 주식회사 스카이플레이 Non-mining blockchain network system for ESG and method of operating of server node participating in the system
KR102514893B1 (en) 2022-04-28 2023-03-29 주식회사 스카이플레이 Method for operating of server node based on NFT in non-mining blockchain network system for ESG and blockchain network system including the server node

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102439351B1 (en) 2022-02-10 2022-09-01 주식회사 스카이플레이 Non-mining blockchain network system for ESG and method of operating of server node participating in the system
KR102514893B1 (en) 2022-04-28 2023-03-29 주식회사 스카이플레이 Method for operating of server node based on NFT in non-mining blockchain network system for ESG and blockchain network system including the server node

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