CN201532934U

CN201532934U - Ellipsoidal electric arc pipe of ceramic metal halide lamp

Info

Publication number: CN201532934U
Application number: CN2009201907932U
Authority: CN
Inventors: 翟建跃; 诸定昌
Original assignee: HAINING XINGUANGYANG OPTO ELECTRONICS CO Ltd
Current assignee: HAINING XINGUANGYANG OPTO ELECTRONICS CO Ltd
Priority date: 2009-08-06
Filing date: 2009-08-06
Publication date: 2010-07-21
Anticipated expiration: 2019-08-06

Abstract

The utility model discloses an ellipsoidal electric arc pipe of a ceramic metal halide lamp. The electric arc pipe comprises a semitransparent alumina electricity discharge cavity and a pair of electrodes, wherein the discharge cavity is filled with activated gas, mercury and metal halide and comprises an ellipsoidal discharge chamber and slender type tail pipes at two ends; the ellipsoidal discharge chamber and the slender type tail pipes at the two ends are in arc transition for the engagement; the whole discharge cavity adopts an integrated structure; the pair of electrodes respectively stretch from the slender type tail pipes at the two ends to the ellipsoidal discharge chamber and are in air sealing connection with each other. The ellipsoidal electric arc pipe has the advantages of good tightness, good color rendering property, uniform distribution of temperature on a pipe wall, good lighting effect, and long service life.

Description

The elliposoidal ceramic metal halide lamp arc tube

Technical field

The utility model relates to a kind of electric arc tube of illuminating industry, particularly a kind of elliposoidal ceramic metal halide lamp arc tube.

Background technology

At present, the preferred polycrystalline alumina ceramic cell-shell of illuminating industry material is compared with the quartz bulb shell that belongs to silicate material together, has better stability at elevated temperature, tangible chemical reaction at high temperature can not take place with metal halide in it, the ceramic metal halide lamp arc tube of making of it has photochromic good stability, advantages such as long service life.The discharge cavity of existing ceramic metal halide lamp arc tube mostly adopts split type, by two bodies or many bodies respectively after the molding moulding again butt joint fire and form, between discharge cavity and tail pipe, both there had been stress, can form cold spot again, liquid metal halide is piled up at this, thereby influenced air-tightness, color rendering and the useful life of electric arc tube.Although some adopts incorporate structure to overcome above-mentioned shortcoming, the Temperature Distribution the when design of shape makes ceramic metal helide lamp work is unreasonable, causes the decline of photoelectric properties such as light efficiency and color rendering equally.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of incorporate elliposoidal ceramic metal halide lamp arc tube, and air-tightness and color rendering are good, and tube wall temperature is evenly distributed, light efficiency height, long service life.

The utility model technical scheme that adopts of dealing with problems is: the elliposoidal ceramic metal halide lamp arc tube, comprise translucent alumina discharge cavity and pair of electrodes, be filled with in this discharge cavity and start gas, mercury and metal halide, described translucent alumina discharge cavity comprises the slender type tail pipe at elliposoidal arc chamber and two ends, adopt arc transition to be connected between the tail pipe at described elliposoidal arc chamber and two ends, whole discharge cavity is integrated, described pair of electrodes stretches into the tail pipe at two ends respectively to the elliposoidal arc chamber, and hermetic seal.

As further improvement, the geometric parameter of described translucent alumina discharge cavity is corresponding with the power of lamp.

The external diameter of elliposoidal arc chamber can be between 3.6mm～30.5mm in the utility model, wall thickness is between 0.4mm～1.8mm, the external diameter of tail pipe can be between 1.5mm～5.8mm, internal diameter is between 0.6mm～3.8mm, is applicable to make the ceramic metal halide lamp arc tube of power between 20W～1000W.The metal halide that is filled in the translucent alumina discharge cavity can be in the halide of Na, Tl, Li, Dy, Ho, Tm etc. one or more.

The beneficial effects of the utility model are: the slender type tail pipe at elliposoidal arc chamber and two ends adopts integral structure, and air-tightness and color rendering are better, and tube wall temperature is evenly distributed, light efficiency height, long service life.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the utility model embodiment.

Fig. 2 is the translucent alumina discharge cavity structural representation of the utility model embodiment.

Below in conjunction with accompanying drawing the utility model is described further:

Embodiment

In conjunction with Fig. 1, shown in Figure 2, be 35W elliposoidal ceramic metal halide lamp arc tube, comprise translucent alumina discharge cavity and pair of electrodes, the translucent alumina discharge cavity comprises the slender type tail pipe 2 at elliposoidal arc chamber 1 and two ends, the radius of curvature of elliposoidal arc chamber 1 is 8.2 ± 0.1mm, external diameter is 8.5 ± 0.1mm, wall thickness 0.46 ± 0.1mm, length 6.0mm ± 0.1mm; The external diameter of tail pipe 2 is 2.0mm ± 0.1mm, and internal diameter is 0.9 ± 0.05mm, length 14 ± 0.1mm.Adopt circular arc 6 transition and linkages between the tail pipe 2 at elliposoidal arc chamber 1 and two ends, arc radius is 2.0 ± 0.1mm.Pair of electrodes stretches into the tail pipe at two ends respectively to the elliposoidal arc chamber, electrode comprises tungsten electrode head 3, be wound with the molybdenum rod 4 of molybdenum circle and form as the niobium bar 5 of contact conductor, adopt the glass solder hermetic seal between niobium bar 5 and the tail pipe 2, whole translucent alumina discharge cavity is integrated, and is filled with the halide that starts gas, mercury and metal Na, Tl, Li, Dy, Ho, Tm in this discharge cavity.

The utility model is when lighting a lamp, and its colour temperature is 3000K, color rendering index 83, light efficiency 95lm/W, and the light sustainment rate under the burning-point 8000 hours is higher than 71%.

Claims

1. elliposoidal ceramic metal halide lamp arc tube, comprise translucent alumina discharge cavity and pair of electrodes, it is characterized in that: described translucent alumina discharge cavity comprises the slender type tail pipe (2) at elliposoidal arc chamber (1) and two ends, adopt arc transition to be connected between the tail pipe (2) at described elliposoidal arc chamber (1) and two ends, whole discharge cavity is integrated, described pair of electrodes stretches into the tail pipe (2) at two ends respectively to elliposoidal arc chamber (1), and hermetic seal.