CN202564173U

CN202564173U - A ceramic metal halide (CMH) lamp

Info

Publication number: CN202564173U
Application number: CN201220245994XU
Authority: CN
Inventors: 王志华
Original assignee: FOSHAN GUANGPU ENGERGY SAVING TECHNOLOGY Co Ltd
Current assignee: FOSHAN GUANGPU ENGERGY SAVING TECHNOLOGY Co Ltd
Priority date: 2012-05-29
Filing date: 2012-05-29
Publication date: 2012-11-28
Anticipated expiration: 2022-05-29

Abstract

The present utility model discloses a ceramic metal halide (CMH) lamp, which comprises an arc tube and an electrode assembly. The arc tube comprises a translucent alumina ceramic discharge cavity and slender tail tubes at two ends, wherein the connection between the discharge cavity and the tail tubes at two ends adopts arc transition, and the inside diameter of the first tail tube is smaller than that of the second one. The electrode assembly comprises ceramic metal rods, and each ceramic metal rod has one end connected with a tungsten electrode rod and the other end connected with a niobium rod, with the three being located on the same axis. In a pair of electrodes, the connection part between the first ceramic metal rod and the tungsten electrode rod serves as an engagement edge corresponding to the discharge cavity. During assembling, the electrode with the first ceramic metal rod only can pass through the second tail tube, and then falls into the first tail tube to be located and sealed hermetically. With the present utility model, only the location of the electrode with the second ceramic metal rod needs to be controlled during sealing, thereby achieving simple manufacture process, high production efficiency and low cost.

Description

A kind of CMH ceramic metal helide lamp

Technical field

The utility model belongs to the electric light source field, is specifically related to a kind of CMH ceramic metal helide lamp.

Background technology

At present; Commonly used CMH metal halogen lamp electrode component and electric arc tube mostly adopt the structure of two ends symmetric form, upper/lower electrode shape, geometric identity; Electric arc tube up and down shape, the physical dimension of tail pipe is also consistent, and electrode all is to stretch into hermetic seal again behind the tail pipe from each self-corresponding direction during assembling.During sealing-in; Glass solder at first should cover enough electrode district length and prevent the corrosion of halide to metallic rod; Can not cover simultaneously too much cermet rod part again to prevent the explosion of this district's earthenware; This makes the length in vacuum seal district in each lamp, all must remain in the very little scope of error, otherwise the burning-point reliability of ceramic metal helide lamp just descends greatly, causes the explosion phenomenon of ceramic tail pipe easily.But columniform alumina metals ceramic bar can swing when the sealing-in with the niobium bar, is difficult for the location, and the length in vacuum seal district is difficult to remain in the very little scope of error.Therefore,, enhance productivity, seek a kind of electrode structure that can locate fast and seemed very crucial in order to increase the reliability in vacuum seal district under the high temperature.

Summary of the invention

The purpose of the utility model is the positioning of electrode difficulty that overcomes prior art, and encapsulation inconvenience proposes a kind of CMH ceramic metal helide lamp; Adopted new structure in its electrode assemblie and the electric arc tube thereof; Make process for sealing greatly easy, operating reliability is strong, has reduced the explosion phenomenon of ceramic tail pipe sealing-in place; Improve production efficiency, reduced production cost.

The technical scheme that the utility model adopts is:

A kind of CMH ceramic metal helide lamp; Comprise electric arc tube, electrode assemblie; Said electric arc tube comprises the elongated tail pipe of translucent alumina ceramics discharge cavity and two ends, and the electrode in the electrode assemblie comprises cermet rod, and an end of cermet rod links to each other with the tungsten electrode bar; The other end is connected with the niobium bar that is used as feed, and the three is on the same axis; Said electrode assemblie stretches into the tail pipe at two ends respectively to discharge cavity.

Adopt arc transition to be connected between the tail pipe at said discharge cavity and two ends, tail pipe comprises first tail pipe, second tail pipe; The internal diameter of first tail pipe is less than the internal diameter of second tail pipe.

The external diameter of said first cermet rod that is positioned at first tail pipe and the first tungsten electrode bar connecting place is greater than the internal diameter of first tail pipe, and the external diameter of first cermet rod and the first niobium bar connecting place is less than the internal diameter of first tail pipe; The external diameter of first cermet rod and the first tungsten electrode bar connecting place is less than the internal diameter of second tail pipe.

Said first cermet rod is the edge clipping corresponding with discharge cavity with tungsten electrode bar junction.

With the utility model electrode assemblie and electric arc tube assembling the time, the electrode with first cermet rod is passed through from second tail pipe, drop into location in first tail pipe, and hermetic seal.The utility model can make electrode location and the sealing-in fast that is positioned at first tail pipe, only needs emphasis control to be positioned at the electrode of second tail pipe during sealing-in.

The beneficial effect of the utility model is: when assembling and sealing-in electrode; The electrode that is arranged in first tail pipe is to pass from second tail pipe, gets into first tail pipe again and locatees automatically, when sealing-in; The electrode that is positioned at first tail pipe can be located and hermetic seal fast, only needs emphasis to control the electrode of second tail pipe.Assembling sealing-in than traditional on average saves for 30% time, and the problem of glass tail pipe explosion is greatly reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the structural representation of the utility model pair of electrodes;

Fig. 3 is positioned at the electrode and the electric arc tube sketch map of first tail pipe for the utility model.

Embodiment

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

Like Fig. 1; 2; Shown in 3, the CMH ceramic metal helide lamp is assembled by electric arc tube and electrode assemblie, and wherein electric arc tube comprises the elongated tail pipe 2 of translucent alumina ceramics discharge cavity 1 and two ends; Adopt arc transition to be connected between the tail pipe 2 at discharge cavity 1 and two ends, the internal diameter of first tail pipe 21 is less than the internal diameter of second tail pipe 22.Electrode assemblie comprises cermet rod 3, and an end of cermet rod 3 links to each other with tungsten electrode bar 4, and the other end is connected with the niobium bar 5 that is used as feed, and the three is on the same axis; First cermet rod 31 that is positioned at first tail pipe 21 and tungsten electrode bar 4 junctions are the edge clipping corresponding with discharge cavity 1; The external diameter of first cermet rod 31 and tungsten electrode bar 4 connecting places is greater than the internal diameter of first tail pipe 21, and the external diameter of first cermet rod 31 and niobium bar 5 connecting places is less than the internal diameter of first tail pipe 21; The external diameter of first cermet rod 31 and tungsten electrode bar 4 connecting places is less than the internal diameter of second tail pipe 22.

When electrode assemblie and electric arc tube assembling, the electrode with first cermet rod 31 is passed through from second tail pipe 22, drop into location in first tail pipe 21, and hermetic seal.The utility model can make electrode location and the sealing-in fast that is positioned at first tail pipe 21, only needs emphasis control to be positioned at the electrode of second tail pipe 22 during sealing-in.

Through test, assembling is with 1000 golden halogen thing lamps of this CMH pottery of sealing-in, and production efficiency on average improves 30%, and ceramic tail pipe explosion reduces 50%.

Claims

1. CMH ceramic metal helide lamp; Comprise electric arc tube, electrode assemblie; It is characterized in that said electric arc tube comprises the elongated tail pipe (2) of translucent alumina ceramics discharge cavity (1) and two ends, the electrode in the electrode assemblie comprises cermet rod (3), and an end of cermet rod (3) links to each other with tungsten electrode bar (4); The other end is connected with the niobium bar (5) that is used as feed, and the three is on the same axis; Said electrode assemblie stretches into the tail pipe (2) at two ends respectively to discharge cavity (1).

2. according to the said CMH ceramic metal helide lamp of claim 1, it is characterized in that adopting arc transition to be connected between the tail pipe (2) at said discharge cavity (1) and two ends, tail pipe (2) comprises first tail pipe (21), second tail pipe (22); The internal diameter of first tail pipe (21) is less than the internal diameter of second tail pipe (22).

3. according to the said CMH ceramic metal helide lamp of claim 2; It is characterized in that the internal diameter of the external diameter of said first cermet rod (31) that is positioned at first tail pipe (21) and first tungsten electrode bar (41) connecting place greater than first tail pipe (21), the external diameter of first cermet rod (31) and first niobium bar (51) connecting place is less than the internal diameter of first tail pipe (21); The external diameter of first cermet rod (31) and first tungsten electrode bar (41) connecting place is less than the internal diameter of second tail pipe (22).

4. according to the said CMH ceramic metal helide lamp of claim 3, it is characterized in that said first cermet rod (31) with tungsten electrode bar (4) junction is and the corresponding edge clipping of discharge cavity (1).