Ceramic gas discharge tube with grid structure electrodes

Abstract

The utility model provides a ceramic gas discharge tube with a grid structure electrode. The discharge tube comprises a first side electrode, a ceramic tube, a metal grid and a second side electrode, pits are formed in the middles of the first side electrode and the second side electrode, the peripheries of the metal grids are welded to the pits, and the metal grids and the first side electrode and the second side electrode on the corresponding sides form composite electrodes; and the peripheries of the first side electrode and the second side electrode are welded through a ceramic tube to form a closed discharge chamber. According to the electrode disclosed by the utility model, a layer of grid is additionally arranged on the upper layer of the pit, after the electrode is coated according to a conventional wet coating process, electronic powder is adhered in the grid and the pit, and when the electrode discharges, the grid can prevent part of the electronic powder in the pit from being sputtered outwards, so that the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of overvoltage protection products, and in particular relates to a ceramic gas discharge tube with grid structure electrodes. Background Art

[0002] Gas discharge tubes are overvoltage and overcurrent protection devices widely used in traffic signal systems, computer data systems, routers, home TV set-top boxes, switching power supplies and other equipment. When there is overvoltage or overcurrent shock in the equipment circuit, the energy is discharged in time to ensure the safe operation of electronic equipment and avoid malfunctions.

[0003] In conventionally designed gas discharge tubes, when the two electrodes discharge, electron powder sputtering will spread throughout the entire cavity. Especially after multiple discharges, the powder loss in the pit is very large, which directly affects the service life of the product. Utility Model Content

[0004] The utility model aims to solve the problem that when a gas discharge tube is discharged, electron powder is sputtered, the powder loss in the pit is large, and the service life of the product is directly affected. A ceramic gas discharge tube with a grid structure electrode is proposed.

[0005] The technical solution of the utility model is:

[0006] The utility model provides a ceramic gas discharge tube with a grid structure electrode, the discharge tube comprising a first side electrode, a ceramic tube, a metal grid and a second side electrode;

[0007] The first side electrode and the second side electrode are both provided with pits in the middle, the outer periphery of the metal grid is welded to the pits, and the metal grid forms a composite electrode with the first side electrode and the second side electrode of the corresponding side respectively;

[0008] The outer peripheries of the first side electrode and the second side electrode are welded through a ceramic tube to form a sealed discharge chamber.

[0009] Furthermore, the first side electrode and the second side electrode are welded to the ceramic tube by using tube solder.

[0010] Furthermore, the first side electrode and the second side electrode are welded to the metal grid by means of annular solder.

[0011] Furthermore, the thickness of the first side electrode and the second side electrode is 0.6-1.5 mm.

[0012] Furthermore, the height of the ceramic tube is 1.5 to 5.5 mm.

[0013] Furthermore, the thickness of the metal grid is 0.1 to 0.3 mm.

[0014] Furthermore, the first side electrode and the second side electrode are made of oxygen-free copper or iron-nickel alloy electrodes.

[0015] Furthermore, the metal grid is made of a tungsten-copper alloy grid.

[0016] Beneficial effects of the utility model:

[0017] The electrode of the utility model adds a layer of grid on the upper layer of the pit. After coating according to the conventional wet coating process, electron powder will adhere to the grid and the pit. When the electrode discharges, the grid will block a part of the electron powder in the pit from sputtering outward, thereby improving the service life of the product.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0020] Figure 1 Shown is a schematic cross-sectional structure diagram of the present utility model.

[0021] Figure 2 An exploded view of the present invention is shown.

[0022] In the figure: 1. Metal grid, 2. Ring solder, 3. First side electrode, 4. Ceramic tube, 5. Ceramic tube, 6. Tube solder. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein.

[0024] like Figure 1 As shown, the utility model provides a ceramic gas discharge tube with a grid structure electrode, the discharge tube includes a first side electrode 3, a ceramic tube 4, a metal grid 1 and a second side electrode 6;

[0025] The first side electrode 3 and the second side electrode 6 are both provided with pits in the middle, and the outer periphery of the metal grid 1 is welded to the pits, and the metal grid 1 forms a composite electrode with the first side electrode 3 and the second side electrode 6 of the corresponding side respectively;

[0026] The outer peripheries of the first side electrode 3 and the second side electrode 6 are welded through the ceramic tube 4 to form a sealed discharge chamber.

[0027] The first side electrode 3 and the second side electrode 6 are welded to the ceramic tube 4 by a tube solder 5; the material of the tube solder 5 is a silver-copper alloy, and the melting point of the solder is 800°C>700°C;

[0028] The first side electrode 3 and the second side electrode 6 are welded to the metal grid 1 by means of an annular solder 2; the material of the annular solder 2 is a silver-copper alloy, and the melting point of the solder is greater than 800°C;

[0029] The first side electrode 3 and the second side electrode 6 are made of oxygen-free copper or iron-nickel alloy electrodes with a thickness of 0.6 to 1.5 mm;

[0030] The height of the ceramic tube 4 is 1.5-5.5 mm; the material is Al2O 3， The content is between 70% and 99%.

[0031] The metal grid 1 is made of a tungsten-copper alloy grid with a thickness of 0.1 to 0.3 mm.

[0032] When implementing:

[0033] like Figure 2 The figure shows an exploded view of the triode of the present invention. The first side electrode 3, the second side electrode 6, the annular solder 2, and the metal grid 1 are concentrically assembled and heated to 850-880°C to form a composite electrode. The ceramic tube 4 and the composite electrode (1+2+3, 1+2+6) are concentrically mounted using the tube solder 5.

[0034] like Figure 1 As shown, a mixture of neon, argon and hydrogen is filled into the gas discharge tube, with the filling ratio of hydrogen accounting for 2-20% of the cavity ratio, the filling ratio of argon accounting for 5-50% of the cavity ratio, and the filling ratio of neon accounting for 35-65% of the cavity ratio. The tube is heated to 800-810°C and kept warm for 10-20 minutes, then cooled naturally to complete the assembly.

[0035] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A ceramic gas discharge tube with a grid structure electrode, characterized in that: The discharge tube comprises a first side electrode (3), a ceramic tube (4), a metal grid (1) and a second side electrode (6); The first side electrode (3) and the second side electrode (6) are both provided with pits in the middle, the outer periphery of the metal grid (1) is welded to the pits, and the metal grid (1) forms a composite electrode with the first side electrode (3) and the second side electrode (6) of the corresponding side respectively; The outer peripheries of the first side electrode (3) and the second side electrode (6) are welded via a ceramic tube (4) to form a sealed discharge chamber.

2. A ceramic gas discharge tube with a grid structure electrode according to claim 1, characterized in that: The first side electrode (3) and the second side electrode (6) are welded to the ceramic tube (4) via tube solder (5).

3. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The first side electrode (3) and the second side electrode (6) are welded to the metal grid (1) via annular solder (2).

4. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The thickness of the first side electrode (3) and the second side electrode (6) is: 0.6~1.5mm.

5. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The height of the ceramic tube (4) is 1.5-5.5 mm.

6. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The thickness of the metal grid (1) is 0.1-0.3 mm.

7. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The first side electrode (3) and the second side electrode (6) are made of oxygen-free copper or iron-nickel alloy electrodes.

8. The ceramic gas discharge tube with grid structure electrodes according to claim 1, characterized in that: The metal grid (1) is made of a tungsten-copper alloy grid.

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