CN209747449U - Three-side flattening electrode suitable for gas discharge lamp - Google Patents
Three-side flattening electrode suitable for gas discharge lamp Download PDFInfo
- Publication number
- CN209747449U CN209747449U CN201920849389.5U CN201920849389U CN209747449U CN 209747449 U CN209747449 U CN 209747449U CN 201920849389 U CN201920849389 U CN 201920849389U CN 209747449 U CN209747449 U CN 209747449U
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- China
- Prior art keywords
- tungsten
- niobium
- tungsten rod
- gas discharge
- discharge lamp
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- Expired - Fee Related
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Abstract
the utility model discloses a trilateral electrode of flattening suitable for gas discharge lamp, niobium pipe middle part are equipped with the cross-section and are regular triangle's location section, and regular triangle's three summit protrusion circular niobium pipe periphery forms the location arch, makes accurate, the stability in location of electrode in the electric arc tube. The positioning section is formed by extruding the circular niobium tube, the tungsten rod and the tungsten wire cannot be subjected to external force, the tungsten rod and the tungsten wire cannot be broken or deformed, the positioning section is convenient to process and low in cost, and the qualification rate and the production rate of products are greatly improved. The opening of niobium pipe one end closed end, the blind end is equipped with the outside tubulose interface that extends, and tungsten pole and niobium pipe carry out threaded connection through the internal thread of tubulose interface and the external screw thread on the tungsten pole, have reduced the requirement to the welding, have guaranteed that the leakproofness of niobium pipe has also improved the qualification rate of product to tungsten pole and niobium pipe between be connected convenient, firm. The outer surface of the tungsten rod is provided with threads, and the tungsten filament is wound on the tungsten rod along the thread gap, so that the winding of the tungsten filament increases the stability and the orderliness.
Description
Technical Field
The utility model belongs to the gas discharge lamp field, concretely relates to trilateral electrode of flattening suitable for gas discharge lamp.
Background
The gas discharge lamp has the following features: (1) the radiation spectrum is selectable. By selecting suitable luminescent substances, the radiation spectrum can be focused on the desired wavelength, or several luminescent substances can be used simultaneously in order to obtain an optimum combined spectrum. (2) They have high efficiency and can convert 25-30% of input electric energy into light output. (3) The service life is long. The service life is as long as 1 ten thousand hours or more than 2 ten thousand hours. (4) The light output maintaining characteristic is good, and 60-80% of initial light output can be provided at the end of service life. Gas discharge lamps are therefore widely used.
In the assembly of gas discharge lamps, electrode positioning and fixing are the most precise of all the processes. In the prior art, most of positioning devices arranged on a niobium tube are three-point wire drawing positioning devices, namely three positioning salient points are scraped at intervals of 120 degrees on the outer circumferential wall surface of the niobium tube along the axial direction, and the relative positions of an electrode and an arc tube are determined by the three positioning salient points. Because the electrode tip is made of tungsten filament material processed at high temperature, in the process of forming the positioning salient point, the electrode tip of the tungsten filament needs to be fixed and shoveled and scraped towards the direction of the niobium tube, so that the tungsten filament electrode is easy to break, the rejection rate is increased, and the defects that the height of three points is inconsistent, the depth is inconsistent, a knife edge is easy to damage during shoveling and scraping and frequent maintenance is needed are overcome. In addition, because the open end of the niobium tube is used as a reference point when the positioning salient point is formed by adopting a three-point drawing mode, the error of the distance between the two electrodes in the arc tube is caused by the error of welding and fixing between the electrodes and the niobium tube, and the accuracy of the distance between the discharge ends of the two electrodes in the arc tube and the uniformity of the lamps with the same specification are influenced.
Disclosure of Invention
The utility model provides a trilateral electrode of flattening suitable for gas discharge lamp has solved the problem of electrode location in the electric arc tube.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a three-side flattened electrode suitable for a gas discharge lamp is characterized by comprising a niobium tube, a tungsten rod and a tungsten filament, wherein one end of the tungsten rod is connected with the niobium tube, and the outer surface of the other end of the tungsten rod is wound with the tungsten filament; one end of the niobium pipe is closed, and the other end of the niobium pipe is opened, the closed end is provided with a tubular interface which extends outwards and is matched with the tungsten rod, and the middle part of the niobium pipe is provided with a positioning section; the positioning section is a special-shaped section which is extruded by a circular niobium pipe and has a regular triangle-shaped cross section, the center of the triangle is superposed with the axis of the niobium pipe, and three vertexes of the regular triangle protrude out of the circumferential surface of the circular niobium pipe to form positioning bulges; the outer surface of the tungsten rod is provided with threads, and the tungsten filament is wound on the tungsten rod along the thread gaps; and the inner wall of the tubular interface is provided with internal threads which are matched with the threads on the outer surface of the tungsten rod and used for connecting the tungsten rod with the niobium pipe.
Further, three vertexes of the regular triangle have circular arc transitions. The electrode is prevented from scratching other surfaces in the assembling process, sharp bulges are prevented from scratching assembling personnel, and the production safety is improved.
Further, the outer diameter of one end of the tungsten rod is larger than that of the other end of the tungsten rod.
Furthermore, the outer diameter of one end of the tungsten rod connected with the tubular interface is larger than that of one end of the tungsten rod wound with a tungsten filament. The volume of the tungsten rod is reduced, the temperature rise is fast, and the starting performance is improved.
Further, the length of the positioning section along the vertical direction of the niobium pipe is 0.3-0.8 mm.
Furthermore, the closed end of the niobium pipe, which is provided with the tubular interface, is U-shaped.
Furthermore, the outer surface of the niobium pipe positioning section is a rough surface. The friction force is increased, and the positioning stability of the electrode in the arc tube is improved.
Further, the outer diameter of the tungsten wire is matched with the thread clearance. Each circle of tungsten wire is wound in the corresponding thread gap, so that the winding stability and the winding order of the tungsten wire are improved.
the utility model discloses the beneficial effect who reaches: the middle part of the niobium tube is provided with a positioning section with a regular triangle section, and three vertexes of the regular triangle protrude out of the circumferential surface of the circular niobium tube to form positioning bulges, so that the electrode is accurately and stably positioned in the arc tube. The positioning section is formed by extruding the circular niobium tube, the tungsten rod and the tungsten wire cannot be subjected to external force, the tungsten rod and the tungsten wire cannot be broken or deformed, the positioning section is convenient to process and low in cost, and the qualification rate and the production rate of products are greatly improved. Niobium pipe one end seals the one end opening, the blind end be equipped with outside extension and with tungsten pole complex tubulose interface, tungsten pole and niobium pipe carry out threaded connection through the internal thread of tubulose interface and the external screw thread on the tungsten pole, with traditional through-hole that is equipped with the connection tungsten pole at niobium pipe tip, compare through welded seal, the technical scheme of this application has reduced the requirement to the welding, the leakproofness of having guaranteed the niobium pipe has also improved the qualification rate of product, and it is convenient, firm to connect between tungsten pole and the niobium pipe. The outer surface of the tungsten rod is provided with threads, and the tungsten filament is wound on the tungsten rod along the thread gap, so that the winding of the tungsten filament increases the stability and the orderliness.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a sectional view taken along line A-A of the present invention;
in the figure: 1-niobium tubing; 2-a tungsten rod; 3-tungsten filament; 4-a tubular interface; 5-a positioning section; 6-thread; 7-positioning the projection.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a three-sided flattened electrode suitable for a gas discharge lamp includes a niobium tube 1, a tungsten rod 2 and a tungsten filament 3, wherein one end of the tungsten rod 2 is connected to the niobium tube 1, and the outer surface of the other end is wound with the tungsten filament 3.
The middle part of the niobium pipe 1 is provided with a positioning section 5, as shown in fig. 2, the positioning section 5 is an irregular section which is extruded by the circular niobium pipe 1 and has a regular triangle cross section. The positioning section 5 is formed by extruding the circular niobium tube 1, the tungsten rod 2 and the tungsten wire 3 cannot be subjected to external force, fracture or deformation cannot occur, the processing is convenient and fast, the cost is low, and the qualification rate and the production rate of products are greatly improved. The center of the triangle is coincided with the axis of the niobium tube 1, and three vertexes of the regular triangle protrude out of the circumferential surface of the circular niobium tube 1 to form a positioning bulge 7, so that the positioning of the electrode in the arc tube is accurate and stable. In the preferred embodiment, the length of the positioning section 5 in the vertical direction of the niobium pipe is 0.3-0.8 mm, and the closed end of the niobium pipe 1, which is provided with the tubular connector 4, is U-shaped.
Three vertexes of the regular triangle are in arc-shaped transition, scratches on other zero surfaces in the assembling process of the electrode are avoided, sharp bulges are prevented from scratching assembling personnel, and the production safety is improved. The outer surface of the positioning section 5 is a rough surface. The friction force is increased, and the positioning stability of the electrode in the arc tube is improved.
One end of each of two ends of the niobium pipe 1 is closed, and the other end of each of the two ends of the niobium pipe is opened, wherein the closed end is provided with a tubular connector 4 extending outwards, and the inner wall of the tubular connector 4 is provided with internal threads. The outer surface of the tungsten rod 2 is provided with threads which are matched with the internal threads, namely, the tubular interface 4 is in threaded connection with the tungsten rod 2, so that the connection of the niobium tube 1 and the tungsten rod 2 is realized. The sealed niobium pipe 1, the tubular interface 4 with the internal thread and the tungsten rod 2 with the thread on the outer surface reduce the requirement on welding, ensure the sealing performance of the niobium pipe 1, improve the qualification rate of products and ensure the convenient and stable connection between the tungsten rod and the niobium pipe.
The outer surface of the tungsten rod 2 is provided with threads, and the tungsten filament 3 is wound on the tungsten rod 2 along the thread gaps. The outer diameter of the tungsten wire 3 is matched with the thread clearance. Each circle of tungsten wire 3 is wound in the corresponding thread gap, so that the winding stability and the winding order of the tungsten wire 3 are improved. After winding the required number of turns of tungsten wire, the connection with the tungsten rod 2 is reinforced by spot welding at the starting end and the ending end of the winding. The outer diameter of one end of the tungsten rod 2 is larger than that of the other end. Further, the outer diameter of one end of the tungsten rod 2 connected with the tubular interface 4 is larger than the outer diameter of one end of the tungsten rod 2 wound with the tungsten filament 3, so that the volume of the tungsten rod 2 is reduced, the temperature rise is fast, and the starting performance is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. A three-side flattened electrode suitable for a gas discharge lamp is characterized by comprising a niobium tube, a tungsten rod and a tungsten filament, wherein one end of the tungsten rod is connected with the niobium tube, and the outer surface of the other end of the tungsten rod is wound with the tungsten filament;
One end of the niobium pipe is closed, and the other end of the niobium pipe is opened, the closed end is provided with a tubular interface which extends outwards and is matched with the tungsten rod, and the middle part of the niobium pipe is provided with a positioning section;
The positioning section is a special-shaped section which is extruded by a circular niobium pipe and has a regular triangle-shaped cross section, the center of the triangle is superposed with the axis of the niobium pipe, and three vertexes of the regular triangle protrude out of the circumferential surface of the circular niobium pipe to form positioning bulges;
The outer surface of the tungsten rod is provided with threads, and the tungsten filament is wound on the tungsten rod along the thread gaps;
and the inner wall of the tubular interface is provided with internal threads which are matched with the threads on the outer surface of the tungsten rod and used for connecting the tungsten rod with the niobium pipe.
2. a three-sided electrode for a gas discharge lamp as claimed in claim 1, wherein the three vertices of the regular triangle have rounded transitions.
3. A three-sided electrode for a gas discharge lamp as defined in claim 1, wherein the tungsten rod has an outer diameter at one end larger than that at the other end.
4. A three-sided electrode for a gas discharge lamp as defined in claim 3, wherein the tungsten rod is connected to the tubular interface with an outer diameter larger than an outer diameter of the tungsten rod at an end thereof around which a tungsten wire is wound.
5. A three-sided electrode for a gas discharge lamp as claimed in claim 1, wherein the length of the positioning portion in the vertical direction of the niobium tube is 0.3 to 0.8 mm.
6. a three-sided electrode for a gas discharge lamp as claimed in claim 1, wherein the closed end of the niobium tube where the tubular fitting is located is "U" shaped.
7. A three-sided electrode for a gas discharge lamp as claimed in claim 1, wherein the outer surface of the positioning section of the niobium tube is roughened.
8. A three-sided electrode for a gas discharge lamp as defined in claim 1 wherein the tungsten wire has an outer diameter matching the thread clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920849389.5U CN209747449U (en) | 2019-06-06 | 2019-06-06 | Three-side flattening electrode suitable for gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920849389.5U CN209747449U (en) | 2019-06-06 | 2019-06-06 | Three-side flattening electrode suitable for gas discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209747449U true CN209747449U (en) | 2019-12-06 |
Family
ID=68723530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920849389.5U Expired - Fee Related CN209747449U (en) | 2019-06-06 | 2019-06-06 | Three-side flattening electrode suitable for gas discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209747449U (en) |
-
2019
- 2019-06-06 CN CN201920849389.5U patent/CN209747449U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 Termination date: 20210606 |
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| CF01 | Termination of patent right due to non-payment of annual fee |