CN211320044U

CN211320044U - High-airtightness sealed cold cathode glow discharge tube

Info

Publication number: CN211320044U
Application number: CN201922333567.1U
Authority: CN
Inventors: 高志刚
Original assignee: Jiangsu Hongyang Photoelectric Co ltd
Current assignee: Jiangsu Hongyang Photoelectric Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-08-21
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a high gas tightness sealed cold cathode glow discharge tube belongs to discharge tube technical field, including tube, electrode, seal end, lead wire and establish the gas packing in the tube inside, the tube is barium sodium boron leadless silicate glass, and the height of seal end is 2-3mm, and thickness is 2-3mm, and the solder joint distance seal end of electrode and lead wire is 0.5-1.5 mm. The expansion coefficients of the barium sodium boron lead-free silicon glass tube shell and the yellow Dumet wire lead wire adopted by the high-airtightness sealed cold cathode glow discharge tube are close, and meanwhile, the height and the thickness of the sealed end and the distance between the welding spot of the electrode and the lead wire and the sealed end are designed, so that the phenomenon that the conventional cold cathode glow discharge tube is not bright due to the problem of chronic air leakage is reduced, the product quality is further improved, the economic loss is reduced, and the use risk is reduced.

Description

High-airtightness sealed cold cathode glow discharge tube

Technical Field

The utility model belongs to the technical field of discharge tube, concretely relates to cold cathode glow discharge tube of high gas tightness sealing-in.

Background

The sealing material of the conventional cold cathode glow discharge tube adopts barium sodium silicate glass and red Dumet wires, wherein the main materials of the barium sodium silicate glass are silicon dioxide, barium oxide and sodium oxide. The red Dumet wire comprises the following components: the core material is made of iron-nickel alloy, copper is wrapped in the middle or copper is plated, and a boron sand layer is coated on the surface of the core material.

The conventional cold cathode glow discharge tube sealed by the materials has a small amount of non-bright phenomenon during storage and use, the proportion reaches about 2 percent, certain economic loss is brought to manufacturers and customers, and the occurrence time is uncertain and the use risk is increased due to the fact that some non-bright parts are caused by chronic gas leakage.

Disclosure of Invention

To the not enough that exists among the prior art, the utility model aims to provide a cold cathode glow discharge tube of high gas tightness sealing-in to solve partial cold cathode glow discharge tube and lead to not bright problem because of chronic gas leakage.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a high-airtightness sealed cold cathode glow discharge tube comprises a tube shell, an electrode, a sealing end, a lead and a gas filler arranged in the tube shell, wherein the tube shell is made of barium-sodium-boron lead-free silica glass, the height of the sealing end is 2-3mm, the thickness of the sealing end is 2-3mm, and the distance between a welding point of the electrode and the lead is 0.5-1.5 mm.

The lead is a yellow Dumet wire.

The electrode is a nickel wire, a nickel-plated iron wire or a nickel alloy wire.

The gas filling is neon gas or mixed gas of neon gas and argon gas.

The outer surface of the lead is plated with a silver layer or a tin layer.

The surface layer of the electrode is coated with electronic powder.

Has the advantages that: compared with the prior art, the method has the following advantages:

1. the utility model discloses a high gas tightness sealed cold cathode glow discharge tube's tube is barium sodium boron leadless silicate glass, adds boron oxide in barium sodium silicate glass, utilizes boron oxide adjustment expansion coefficient and dumet's expansion coefficient (85-90) × 10^-7The more the/K is close, the smaller the difference between the expansion coefficients of the adjusting pipe shell and the Dumet wire is, the moreThe high-air-tightness sealing is favorably formed;

2. the high-airtightness sealed cold cathode glow discharge tube further designs the shape of the sealing end, the height of the sealing end is 2-3mm, the thickness is 2-3mm, high-airtightness sealing is favorably formed, and meanwhile, the distance between the electrode and a Dumet wire welding point is 0.5-1.5mm from the sealing end, so that the problem of inconsistent expansion caused by the fact that the welding point touches glass is avoided;

3. the lead wire of the high-airtightness sealed cold cathode glow discharge tube adopts yellow Dumet wire, and the surface treatment layer of the lead wire is made of complete Cu₂The glass sealing material consists of O and amorphous inorganic salt, the yellow Dumet wire copper layer is firmly combined with a core wire, the expansion coefficient is stable, the anti-oxidation mildew performance is good, the sealing performance with glass is more excellent, and high-airtightness sealing with the glass with the expansion coefficient close to that of the glass is favorably formed;

4. the utility model discloses a high gas tightness sealed cold cathode glow discharge tube has improved conventional cold cathode glow discharge tube's gas tightness, has reduced and has leaded to the phenomenon that glow discharge tube is not bright because of chronic gas leakage problem, has further promoted product quality, has reduced economic loss, has reduced the use risk.

Drawings

FIG. 1 is a schematic view of a structure of a cold cathode glow discharge tube sealed in a highly airtight manner.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the high-airtightness sealed cold cathode glow discharge tube comprises a tube shell 1, an electrode 2, a sealing end 3, a lead 4 and a gas filler 5 arranged inside the tube shell. Wherein, the tube shell 1 is barium sodium boron lead-free silicon glass. The lead 4 is yellow Dumet wire, and the surface of the lead is plated with a silver layer or a tin layer. The electrode 2 is a nickel wire, a nickel-plated iron wire or a nickel alloy wire, and the surface layer is coated with electronic powder. The gas filler 5 is neon gas or a mixed gas of neon gas and argon gas. The height of the sealing end 3 is 2-3mm, the thickness is 2-3mm, and the distance between the welding point of the electrode 2 and the lead 4 is 30.5-1.5 mm.

The utility model discloses a high gas tightness sealed cold cathode glow discharge tube's tubeAdding boron oxide into barium-sodium-boron lead-free silica glass, and adjusting the expansion coefficient and Dumet wire expansion coefficient (85-90) × 10 by using boron oxide^-7the/K is closer, so that the smaller the difference between the expansion coefficients of the tube shell and the Dumet wire is, the more favorable the high-airtightness seal is formed.

The shape design of the sealing end is important for the sealing airtightness. The low height of the sealing end can cause the contact area at the sealing position to be too small, which is not favorable for forming high-air-tightness sealing. The over-thickness of the sealing end can cause the pressure sealing to be not firm, increase the stress of the glass and easily form chronic air leakage and glass burst. When the height of the sealing end is 2-3mm and the thickness is 2-3mm, the sealing end is optimal for forming high-air-tightness sealing. Meanwhile, the distance between the electrode and the Dumet wire welding point is 0.5-1.5mm from the sealing end, so that the problem of inconsistent expansion caused by the fact that the welding point touches the glass is avoided.

The lead wire is made of yellow Dumet wire, and the surface treatment layer of the lead wire is made of complete Cu₂The glass sealing material consists of O and amorphous inorganic salt, the yellow Dumet wire copper layer is firmly combined with a core wire, the expansion coefficient is stable, the anti-oxidation mildew performance is good, the sealing performance with glass is more excellent, and the glass sealing material is favorable for forming high-air-tightness sealing with glass with the expansion coefficient close to that of the glass.

Claims

1. A high-airtightness sealed cold cathode glow discharge tube is characterized by comprising a tube shell (1), an electrode (2), a sealing end (3), a lead (4) and a gas filler (5) arranged inside the tube shell, wherein the tube shell (1) is made of barium-sodium-boron lead-free silicon glass, the height of the sealing end (3) is 2-3mm, the thickness of the sealing end is 2-3mm, and the distance between a welding spot of the electrode (2) and the lead (4) and the sealing end (3) is 0.5-1.5 mm.

2. A highly hermetically sealed cold cathode glow discharge tube as claimed in claim 1, characterized in that said lead wire (4) is a yellow dumet wire.

3. A highly gastight sealed cold cathode glow discharge tube according to claim 1, wherein said electrode (2) is a nickel wire, nickel-plated iron wire or nickel alloy wire.

4. A highly gastight sealed cold cathode glow discharge tube according to claim 2, wherein the outer surface of said lead wires (4) is plated with a layer of silver or tin.

5. A hermetically sealed cold cathode glow discharge tube according to claim 3, wherein the surface layer of said electrode (2) is coated with an electron powder.