CN205900506U - Tungsten electrode and high -pressure mercury discharge lamp - Google Patents

Abstract

The utility model provides a tungsten electrode, include: head, afterbody and embolia the tungsten coil of head, the head includes with the frustum of a cone in axle center, the local section of spheroid, 1 or a plurality of cylinder in proper order, the afterbody is with final the cylinder is connected and is passed through through the circular arc, the diameter of afterbody is less than connected finally the diameter of cylinder, tungsten electrode maintaining voltage is stable, and is longe -lived, the utility model also discloses an one kind contains the high -pressure mercury discharge lamp of tungsten electrode.

Description

A kind of tungsten electrode and high-voltage mercury discharging lamp

Technical field

This utility model is related to photoelectricity field, particularly relates to a kind of tungsten electrode.

Background technology

High-voltage mercury discharging lamp is, has two tungsten electrodes being arranged oppositely in an almost spherical quartz chamber body, two Tungsten electrode relative position is fixed by fused quartz melt respectively, then passes through molybdenum sheet transition, realizes two tungsten electrodes and external power source wire Connection.Molybdenum sheet is sealed by external heat source heat fusion with quartz glass, forms seal cavity.It is filled with rare in seal cavity Luminous under gas and hydrargyrum discharge excitation effect between two tungsten electrodes.

Above-mentioned tungsten electrode generally by a φ 0.4mm about high-purity tungsten bar be embedded into high-purity tungsten wire circle, then pass through swash The modes such as light heating merge molding.Merge the tungsten electrode head after molding and show spherical, need by melt-processed of discharging, Cai Neng Tungsten electrode head generates raised, formation electric discharge cusp.It is low and raw that the raised cusp that electric discharge melt-processed generates has dimensional accuracy Become, in the position of tungsten electrode spherical head, shape, there is uncontrollable shortcoming.Bulb lighting spread of voltage, life-span easily occur Short.

Content of the invention

The utility model proposes a kind of tungsten electrode, solve the problems, such as above-mentioned in mention.

The technical solution of the utility model is achieved in that a kind of tungsten electrode, comprising: head, afterbody and be inserted in described The tungsten wire circle of head, described head includes the concentric frustum of a cone, the section of spheroid local, one or more cylinders successively, described Afterbody is connected and passes through with cylinder last described arc transition, the diameter of described afterbody be less than connected last Individual described cylindrical diameter.

Further, the diameter of described frustum of a cone tail end and the diameter ratio on top are more than 1.7.

Further, conicity θ of the described frustum of a cone is 35 ° < θ < 65 °.

Further, the length of described head and the ratio of maximum gauge are 1.3-2.6.

Further, described tungsten electrode is made by machining.

A kind of high-voltage mercury discharging lamp containing described tungsten electrode.

Described tungsten electrode of the present utility model, has the advantage that

A. machining, its dimensional accuracy, position, shape are easier to ensure that；

B. the diameter of electric discharge cusp (the described frustum of a cone) tail end and the diameter ratio on top are more than 1.7,35 ° of < θ of conicity < electric discharge cusp and offsets it is ensured that electrical discharge arc is consistent in 65 ° of design during can preventing two tungsten electrode discharge lamp operatings Property；

C. electric discharge cusp (the described frustum of a cone) is combined by concentric spheroid local section, one or more cylinders below Design, after energising, forms micro- electromagnetic field environment in solid axle center, can play the electronics compensating on electric discharge cusp and run off, prevent The electric discharge too fast abrasion of cusp, maintenance voltage stability, extend the life-span.

Brief description

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, before not paying creative labor Put, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of structural representation of this utility model one embodiment of tungsten electrode；

Fig. 2 is tungsten electrode structural manufacturing process parameter schematic diagram shown in Fig. 1；

Fig. 3 is a kind of structural representation of high-voltage mercury discharging lamp of this utility model.

Specific embodiment

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of making creative work The every other embodiment being obtained, broadly falls into the scope of this utility model protection.

As shown in figure 1, a kind of tungsten electrode 2, comprising: head, afterbody 21 and the tungsten wire circle 22 being inserted in head, head wraps successively Include the concentric frustum of a cone 23, spheroid local section the 24, first cylinder 25, the second cylinder 26, afterbody 21 and the second cylinder Body 26 connects and passes through arc transition, and the diameter of afterbody 21 is less than last cylindrical diameter connected, discharge tip Point (frustum of a cone) is cut into slices by concentric spheroid local below, one or more cylinder modular design, after energising, in solid Axle center forms micro- electromagnetic field environment, can play the electronics compensating on electric discharge cusp and run off, prevent the too fast abrasion of cusp of discharging, maintain Voltage stability, extends the life-span.

As shown in Fig. 2 the frustum of a cone 23 meets as electric discharge cusp: l2/l1>1.7,35 °<θ<65 ° of conicity；Multiple folded Plus geometry body length meets 1.3≤l3/ maximum cylinder diameter φ a≤2.6, this design, two tungsten electrode electric discharges can be prevented Electric discharge cusp skew occurs it is ensured that electrical discharge arc concordance during lighting.

Further, tungsten electrode 2 is made by machining, and its dimensional accuracy, position, shape are easier to ensure that.

As shown in figure 3, a kind of high-voltage mercury discharging lamp containing tungsten electrode, including structure quartz chamber body 1, in quartz chamber body It is symmetrically arranged with tungsten electrode 2, tungsten electrode 2 connects external power source by molybdenum sheet.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this Within the spirit of utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this utility model Protection domain within.

Claims (6)

1. a kind of tungsten electrode is it is characterised in that include: head, afterbody and the tungsten wire circle being inserted in described head, described head is successively Including the concentric frustum of a cone, the section of spheroid local, one or more cylinders, described afterbody and last described cylinder Connect and pass through arc transition, the diameter of described afterbody is less than last described cylindrical diameter connected.

2. as described in the appended claim 1 tungsten electrode it is characterised in that: the diameter of described frustum of a cone tail end and the diameter ratio on top More than 1.7.

3. as stated in claim 2 tungsten electrode it is characterised in that: conicity θ of the described frustum of a cone be 35 ° < θ < 65 °.

4. as described in the appended claim 1 tungsten electrode it is characterised in that: the ratio of the length of described head and maximum gauge is 1.3- 2.6.

5. as described in the appended claim 1 tungsten electrode it is characterised in that: described tungsten electrode is made by machining.

6. a kind of high-voltage mercury discharging lamp containing described tungsten electrode arbitrary in claim 1-5.