High arc voltage ceramic gas discharge tube

Abstract

The utility model relates to the technical field of ceramic gas discharge tubes, and discloses a high arc voltage ceramic gas discharge tube which comprises a ceramic tube, two heat exchange plates are fixedly installed in the ceramic tube, and an anode end and a cathode end are fixedly installed on the two heat exchange plates respectively. An anode tip and a cathode tip are fixedly mounted on the anode end and the cathode end respectively; protective covers are fixedly mounted at the two ends of the ceramic tube; one side of the anode terminal and one side of the cathode terminal deviating from the ceramic tube are respectively and fixedly provided with an anode pin and a cathode pin, and the anode pin and the cathode pin penetrate through the protective cover at the corresponding side. The arc-shaped discharge tube is simple and convenient, can lengthen the arc in the discharge process, achieves the effects of increasing the arc voltage and shortening the follow current arc extinguishing time, is lower in cost, and is suitable for large-scale production. The use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic gas discharge tubes, in particular to a high arc voltage ceramic gas discharge tube. Background Art

[0002] Ceramic gas discharge tube (GDT for short) is a sealed device with one or more discharge gaps filled with inert gas. The electrical performance of the ceramic gas discharge tube depends on factors such as gas type, gas pressure, internal electrode structure, and manufacturing process. An electrode is provided at each end of the ceramic gas discharge tube. When the voltage applied to the two electrodes reaches the point where the gas in the GDT breaks down, discharge begins, changing from high impedance to low impedance, causing the surge voltage to short-circuit quickly to near zero voltage, and releasing the overcurrent into the ground, thereby protecting the subsequent circuits.

[0003] The existing patent with publication number CN209150488U discloses a high arc voltage ceramic gas discharge tube, which includes two side electrodes and a ceramic tube between the two side electrodes. The ceramic tube has an oblique hollow pipe, and the two side electrodes are each provided with a protrusion facing the hollow pipe.

[0004] The above device has the following problems when in use:

[0005] (1) In order to lengthen the arc distance, the shape of the electrode and the internal space of the ceramic tube have been greatly changed. Separate mold opening, stamping and firing are required, which is costly and not conducive to large-scale production activities.

[0006] (2) Ceramic gas discharge tubes generate a large amount of heat when in use. The heat dissipation effect of the ceramic gas discharge tube is poor. The heat will cause the inert gas inside to expand. Long-term expansion will easily cause the inert gas to leak. In addition, high temperature will also affect the function of the ceramic gas discharge tube, resulting in a shortened service life. Utility Model Content

[0007] The utility model aims to solve the problems existing in the prior art and proposes a high arc voltage ceramic gas discharge tube which has low cost and is convenient for long-term use.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A high arc voltage ceramic gas discharge tube comprises a ceramic tube, two heat exchange plates are fixedly installed inside the ceramic tube, an anode end and a cathode end are fixedly installed on the two heat exchange plates, and an anode tip and a cathode tip are fixedly installed on the anode end and the cathode end respectively;

[0010] Protective covers are fixedly installed on both ends of the ceramic tube;

[0011] An anode pin and a cathode pin are respectively fixedly installed on the side of the anode end and the cathode end away from the ceramic tube, and both the anode pin and the cathode pin penetrate the protective cover on the corresponding side.

[0012] Preferably, the anode tip and the cathode tip are cones of the same size, the anode tip is made of the same material as the anode end, and the cathode tip is made of the same material as the cathode end.

[0013] Preferably, the anode tip and the cathode tip are installed at one vertically upward and the other vertically downward, and in a side view, the line between the anode tip and the cathode tip is the diagonal line of the rectangle formed by the ceramic tube.

[0014] Preferably, heat dissipation holes are evenly and equidistantly formed on the protective cover.

[0015] Preferably, a waterproof and breathable membrane is embedded and installed inside the protective cover, and the waterproof and breathable membrane is located in a closed space between the protective cover and the heat exchange plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The utility model is provided with a ceramic tube, an anode end, a cathode end, an anode tip and a cathode tip, and the distance between the anode tip and the cathode tip reaches the maximum value that can be achieved. When the gas is broken down, due to the tip discharge principle, the discharge process arc can be simply and conveniently lengthened to achieve the effect of increasing the arc voltage and shortening the arc extinguishing time. The cost is low and it is easy to use.

[0018] (2) The utility model is provided with a protective cover, a heat exchange plate, heat dissipation holes and a waterproof breathable membrane. The heat generated by the internal activity of the ceramic tube will be transferred to the heat exchange plates on both sides. The heat dissipation holes on the protective cover allow the outside cooler air to enter, thereby exchanging heat with the heat exchange plate, and the equipment can be quickly and continuously cooled, which is convenient for long-term use.

[0019] (3) The utility model is provided with a ceramic tube, a protective cover, an anode pin, a cathode pin, an anode terminal, a cathode terminal and a waterproof breathable membrane. The welding point between the anode pin and the anode terminal, and the welding point between the cathode pin and the cathode terminal are all inside the protective cover, which can avoid direct contact with the external humid air and avoid corrosion and other situations that affect continuous use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a high arc voltage ceramic gas discharge tube proposed by the utility model;

[0021] Figure 2This is a schematic diagram of the internal installation structure of a high arc voltage ceramic gas discharge tube proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the installation positions of the anode tip and cathode tip of a high arc voltage ceramic gas discharge tube proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the installation position of a waterproof and breathable membrane of a high arc voltage ceramic gas discharge tube proposed by the utility model.

[0024] In the figure: 1. Ceramic tube; 2. Protective cover; 3. Anode pin; 4. Cathode pin; 5. Heat exchange plate; 6. Anode end; 7. Cathode end; 8. Anode tip; 9. Cathode tip; 10. Heat dissipation hole; 11. Waterproof and breathable membrane. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 4 A high arc voltage ceramic gas discharge tube includes a ceramic tube 1. Two heat exchange plates 5 are fixedly installed inside the ceramic tube 1. The internal space formed by the two heat exchange plates 5 and the ceramic tube 1 is a sealed space. By filling the space with inert gas, the gas breakdown is achieved to protect the circuit.

[0027] The heat exchange plate 5 is made of insulating heat-conducting material, which can smoothly transfer the heat generated by the internal activity of the ceramic tube 1 to itself, and then dissipate heat through heat conduction and heat convection, ensuring the stability of the overall equipment and extending the service life of the equipment.

[0028] An anode end 6 and a cathode end 7 are fixedly mounted on the two heat exchange plates 5, and an anode tip 8 and a cathode tip 9 are fixedly mounted on the anode end 6 and the cathode end 7, respectively;

[0029] When the gas is broken down, due to the tip discharge principle, the curvature of the anode tip 8 and the cathode tip 9 is larger, the surface charge density is higher, and the field strength near them is also greater. Combined with the inert gas inside the sealed space, the discharge process achieves the effect of lengthening the arc, increasing the arc voltage, and shortening the arc extinguishing time.

[0030] An anode pin 3 and a cathode pin 4 are fixedly mounted on the side of the anode terminal 6 and the cathode terminal 7 facing away from the ceramic tube 1 , respectively.

[0031] By soldering the anode pin 3 and the cathode pin 4 to corresponding points on the circuit board, the device can be smoothly connected to the corresponding circuit, thereby achieving a circuit protection effect.

[0032] Protective covers 2 are fixedly mounted on both ends of the ceramic tube 1 , and the anode pin 3 and the cathode pin 4 both penetrate the protective cover 2 on the corresponding side.

[0033] The welding point between the anode pin 3 and the anode terminal 6 and the welding point between the cathode pin 4 and the cathode terminal 7 are both inside the protective cover 2, which can prevent the welding points from direct contact with the external humid air and avoid corrosion and other situations that affect continuous use.

[0034] The anode tip 8 and the cathode tip 9 are cones of the same size. The material of the anode tip 8 is the same as that of the anode terminal 6 , and the material of the cathode tip 9 is the same as that of the cathode terminal 7 .

[0035] The anode tip 8 and the anode terminal 6, the cathode tip 9 and the cathode terminal 7 may be an integrally formed structure. Preferably, the anode tip 8 and the anode terminal 6 may be made of metal or alloy, and the cathode tip 9 and the cathode terminal 7 may be made of tungsten wire.

[0036] The installation positions of the anode tip 8 and the cathode tip 9 are one vertically upward and the other vertically downward. In the side view, the line connecting the anode tip 8 and the cathode tip 9 is the diagonal line of the rectangle formed by the ceramic tube 1. At this time, the distance between the two inside the ceramic tube 1 is the largest.

[0037] Since the distance between the anode tip 8 and the cathode tip 9 is the largest, the arc can be lengthened, the arc voltage can be increased, and the follow current arc extinguishing time can be shortened during the discharge process.

[0038] The protective cover 2 is provided with heat dissipation holes 10 at even intervals.

[0039] The heat dissipation holes 10 allow cooler air from the outside to enter, thereby exchanging heat with the heat exchange plate 5, and can quickly and continuously cool down the device, making it convenient for long-term use.

[0040] A waterproof and breathable membrane 11 is embedded and installed inside the protective cover 2 , and the waterproof and breathable membrane 11 is located in a closed space between the protective cover 2 and the heat exchange plate 5 .

[0041] The presence of the waterproof breathable membrane 11 prevents water vapor from invading the interior of the device and affecting the welding points, and also ensures the stable operation of the device to a certain extent.

[0042] The working process of the utility model is that by soldering the anode pin 3 and the cathode pin 4 to corresponding points on the circuit board, the device can be smoothly connected to the corresponding circuit, thereby achieving a circuit protection effect.

[0043] In the specific use link, when the gas is broken down, due to the tip discharge principle, the anode tip 8 and the cathode tip 9 achieve the effect of lengthening the arc in the discharge process, increasing the arc voltage, and shortening the arc extinguishing time.

[0044] When the heat of the equipment is high, the heat generated by the internal activity of the ceramic tube 1 is transferred to the heat exchange plate 5. The heat dissipation holes 10 allow the cooler air from the outside to enter, thereby exchanging heat with the heat exchange plate 5. This can quickly and continuously cool the equipment for long-term use.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high arc voltage ceramic gas discharge tube, comprising a ceramic tube (1), characterized in that: Two heat exchange plates (5) are fixedly mounted inside the ceramic tube (1), an anode end (6) and a cathode end (7) are fixedly mounted on the two heat exchange plates (5), and an anode tip (8) and a cathode tip (9) are fixedly mounted on the anode end (6) and the cathode end (7); An anode pin (3) and a cathode pin (4) are respectively fixedly mounted on the side of the anode end (6) and the cathode end (7) facing away from the ceramic tube (1); The anode tip (8) and the cathode tip (9) are cones of the same size. The material of the anode tip (8) is the same as that of the anode end (6), and the material of the cathode tip (9) is the same as that of the cathode end (7). The installation positions of the anode tip (8) and the cathode tip (9) are one vertically upward and the other vertically downward. In the side view, the line connecting the anode tip (8) and the cathode tip (9) is the diagonal line of the rectangle formed by the ceramic tube (1).

2. A high arc voltage ceramic gas discharge tube according to claim 1, characterized in that: Protective covers (2) are fixedly mounted on both ends of the ceramic tube (1), and the anode pin (3) and the cathode pin (4) both penetrate the protective cover (2) on the corresponding side.

3. A high arc voltage ceramic gas discharge tube according to claim 2, characterized in that: The protective cover (2) is provided with heat dissipation holes (10) at even intervals.

4. A high arc voltage ceramic gas discharge tube according to claim 2 or 3, characterized in that: A waterproof and breathable membrane (11) is embedded and installed inside the protective cover (2), and the waterproof and breathable membrane (11) is located in a closed space between the protective cover (2) and the heat exchange plate (5).

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