Surge absorption tube and manufacturing method thereof

Abstract

The invention relates to a surge absorption tube and a manufacturing method thereof; the surge absorption tube comprises a ceramic package type surge absorption tube and an outer glass tube sheathed outside the ceramic package type surge absorption tube, wherein two ends of the outer glass tube are respectively sealed by a sealing electrode column; the outer sides of the sealing electrode columns are respectively connected with a lead; the inner sides of the sealing electrode columns are contacted with an internal electrode surface; and according to the method, the glass tube is sheathed outside a ceramic tube. The invention combines of the characteristics of the ceramic tube which is large in flow-passing resistance and not being molten at a high temperature generated by a surge, and the characteristics of the glass tube which is easy in package, low in cost and capable of realizing micro-gap discharge; and the brand-new surge absorption tube can be manufactured by the special manufacturing method. The invention has the characteristics of being low in cost, and rapid in response speed, and solves the problems that the conventional ceramic type surge absorption tube is high in cost, easy in chronic air leakage and slow in response speed in the prior art; the surge-resistant capability of products is strong; and the invention also overcomes the defect that the conventional glass-type surge absorption tube is inadequate in surge capacity.

Description

technical field [0001] The invention relates to the field of circuit protection, in particular to a surge absorbing tube arranged in a circuit to protect the circuit and a manufacturing method thereof. Background technique [0002] There are two types of switching surge absorbers currently on the market, one is ceramic package and the other is glass package. [0003] Ceramic encapsulated surge absorber products have relatively stable electrical properties and strong current resistance, but the production cost is relatively high. Because it uses alloy solder, the metal electrode and the ceramic oxide metal layer are welded by high-temperature vacuum, and the welding surface is easy to form. In the case of incomplete sealing, the internal inert gas will leak slowly, causing the product to lose its efficacy. In the current miniaturized ceramic products, the cost is high, and due to defects such as structural design, ultra-fine gap discharge cannot be achieved, resulting in slo...

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Problems solved by technology

[0003] Ceramic encapsulated surge absorber products have relatively stable electrical properties and strong current resistance, but the production cost is relatively high. Because it uses alloy solder, the metal electrode and the ceramic oxide metal layer are welded by high-temperature vacuum, and the welding surface is easy to form. Incomplete sealing, resulting in chronic leakage of internal inert gas, resulting in loss of efficacy of the product

In the current miniaturized ceramic products, the cost is high, and due to structural design and other defects, it is impossible to achieve ultra-fine gap discharge, resulting in slow response speed of some products, and the protection effect is obviously insufficient.

[0004] The glass-encapsulated surge absorber product has low cost, but its current resistance is significantly worse than that of the ceramic type surge absorber, and it is very easy to cause the glass tube to be broken by a large energy impact during operation, resulting in product failure.

Although this type of product adopts the principle of micro-gap discharge, due to defects such as the design of its electron emission, under multiple surge conditions, it is relatively easy to cause poor insulation of the product and attenuation of the protection voltage, causing the product to malfunction under normal conditions. protection, rendering normal products inoperable

[0005] Therefore, some ceramic surge absorber manufacturers use small ceramic tubes to make up for the defect that their products cannot be miniaturized, but due to the relatively high process cost and product material cost, the overall cost of the product still cannot be reduced; some glass surge absorbers Tube manufacturers use large glass tubes to make up for the lack of product flow capacity, but due to the low output and high production costs of large glass tubes, the product cost is relatively high

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