Support structure of compact high pressure sodium lamp

Abstract

A support structure of a compact high pressure sodium lamp comprises a main support and an auxiliary support in a bubble shell. Lower ends of the main support and the auxiliary support are connected with a lamp holder. One side of an upper end of the main support is in a bending shape and the upper end is tightly cooperated with an inner wall of the bubble shell. An upper end of an arc tube is connected to the main support. An upper nickel strip welds a niobium tube on the arc tube and the main support into a flexible-connected integral body. A top end of the auxiliary support is provided with auxiliary frame bending. The auxiliary support is inserted into the niobium tube of a lower end of the arc tube. A lower nickel strip welds the niobium tube and the auxiliary support into the flexible-connected integral body. By using the support, the size of the high pressure sodium lamp is greatly reduced and miniaturized and a high temperature when a bulb works can be borne. Good temperature-resistance materials, such as a molybdenum rod, a molybdenum wire and quartz glass are selected and good welding performance among the nickel strip, the niobium tube and the molybdenum rod are fully used. Bulb welding reliability is guaranteed. Because expansion coefficients of parts are inconsistent and a cold and hot temperature difference is large, a welding portion is sealing-off or tube-explosion so that the bulb has an early failure and there is a quality problem. By using the structure of the invention, the above problem is avoided. A usage scope of the lamp is enlarged and working reliability is increased.

Description

technical field [0001] The invention relates to the main parts of a high-pressure sodium lamp, especially the support structure of a compact high-pressure sodium lamp with power below 200W, small size and single-end use. Background technique [0002] In some special lighting applications of high-intensity gas discharge lamps, such as spotlights, spotlights, garden lights, etc., and in the required local lighting places, in order to cooperate well with lamps and reflectors, it is necessary to use light bulbs, relatively standard As far as the light bulb is concerned, its diameter and length will be greatly reduced for miniaturization. For example, for a 150W high-efficiency sodium lamp, the standard bulb has a diameter of 46 mm and a length of 210 mm, while a compact bulb has a diameter of less than 25 mm and a length of less than 140 mm. [0003] Under the premise of a certain type and power of the bulb, the heat generated by the bulb is basically unchanged. Now it is requi...

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Problems solved by technology

[0004] Patent Application No. 201110384088.8 "A High Luminous Efficiency Sodium Lamp with Integral Bracket" only discloses a large and small bracket as an integral bracket, thereby reducing welding points and increasing the reliability of work, but it also needs to be equipped with elastic Connect brackets to reduce tube explosion

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