CN2155072Y - Lighting device - Google Patents

Abstract

The utility model provides a novel high voltage sodium lamp illuminating device for a lighting system with the automatic control function. The utility model is suitable for occasions such as a railway tunnel. The utility model is characterized in that an electrode which is provided with a double-spiral inner layer and an ordinary spiral outer layer is adopted as a discharge lamp, and high-pressure xenon is inserted into the discharge lamp. The utility model has the advantages that the working voltage rises when an electric bulb starts the arc, so that the electric bulb returns to stabilization at short time; the heat conduction loss is reduced. Compared with the luminescence efficiency of the general high voltage sodium lamp, the luminescence efficiency of the electric bulb of the utility model is raised by about 5%, and the color rendition is improved. Because an inductance type ballast whose starting current ranges from 1.8A to 2.2A is adopted in the utility model, the utility model has the instantaneous starting function.

Description

Lighting device

The utility model relates to a kind of lighting device technology, provides a kind of novel high-pressure sodium lamp lighting device for having automatic controlled function illuminator, is specially adapted to use in similar occasions such as railway tunnel.

Lighting device in the existing lighting device, particularly tunnel is because shortcoming such as the bulb thermal inertia is big and the ballast starting current is little, and it is hot chronic that lighting device is given, and is unsuitable for controlling in the illuminator automatically using.

The purpose of this utility model is to overcome above-mentioned shortcoming a kind of instantaneous starting function that has is provided, can be at the high-pressure sodium lamp lighting device of the illuminator use of controlling automatically.

The technical solution of the utility model is achieved in that a kind of lighting device, is made up of high-pressure sodium lamp, ballast, electronic trigger and compensation condenser.Wherein high-pressure sodium lamp is made up of discharge tube, outer glass shell, lamp holder, bracing frame, bimetal release, assistant starting silk, getter, electrode etc., its special character is that it is that double helix, skin are the electrode of common spiral that discharge tube adopts the coreless armature of the continuous coiling of ectonexine or internal layer, is filled with the high-pressure xenon that pressure is 20～40KPa in the discharge tube.It is the Inductive ballast of 1.8～2.2A that starting current also has been installed in lighting device.

The utility model has the advantages that owing to charged into high-pressure xenon in the discharge tube, operating voltage during the bulb starting the arc is elevated to about 40V about by original 10V, the starting current of 1.8～2.2A that thermal inertia that the discharge tube electrode is little and special-purpose ballast provide has quickened the rising of bulb operating voltage, and light output can be basicly stable at short notice for bulb.The hyperbar xenon has reduced the heat conduction loss of mist in the discharge tube, and the luminous efficiency of bulb improves about 5% than general high voltage sodium vapor lamp, and color rendering is also slightly improved.

Now describe the utility model most preferred embodiment in conjunction with the accompanying drawings in detail.

Fig. 1 is the lighting device schematic circuit.

Fig. 2 is a lighting device mesohigh sodium vapor lamp structure chart.

Fig. 3 is an electrode structural chart.

Fig. 3-a is the coreless armature structure of the continuous coiling of ectonexine.

Fig. 3-b is that internal layer is a double helix, and skin is common single-screw electrode structure.

Among the figure:

C: compensation condenser.

B: special inductive formula ballast.

S: electronic trigger.

L: novel high-pressure sodium vapor lamp.

1: lamp holder.

2.10: batalum getter.

3: bimetal release.

4: bracing frame.

5.9: electrode.

6: discharge tube.

7: the assistant starting silk.

8: outer glass bulb.

11: cap contact.

12: external spiral.

13: inside spin.

14: electrode stem.

Fig. 1 is this lighting device electrical schematic diagram.Building-out capacitor C is used for improving the power factor (PF) of lighting device, and ballast B provides big starting current on the one hand, on the other hand because bulb L is a negative-resistance device, so ballast B also works to place restrictions on the unlimited increase of electric current.S is an electronic trigger, and when its both end voltage can produce thousands of deep-sited pulses pressure of leaping high during greater than 160V, the disruptive discharge pipe is not then worked when both end voltage is lower than 160V.

Fig. 2 is the high-pressure sodium lamp structure chart.A pair of modified model electrode 5 and 9 are arranged in the semi-transparent polycrystal aluminium oxide discharge tube 6.Xenon pressure in the discharge tube 6 is 25～40KPa.The sodium amalgam that 5～10mg ratio is 1:4～1:8 also is housed in the discharge tube 6.One end of discharge tube is connected with bracing frame 4, and bracing frame 4 links to each other with lamp holder 1 by lead-in wire.The discharge tube other end welds with the contact 11 of lamp holder 1 mutually by lead-in wire.Be wound with assistant starting silk 7 on the discharge tube 6, an end of assistant starting silk 7 freely suspends, and the other end links to each other with bracing frame 4 by bimetal release 3.Discharge tube 6 in being pumped into the outer glass bulb 8 of high vacuum, in order further to improve the vacuum degree in the outer glass bulb 8, also is equipped with two getters 2 and 10 by sealing-in in the outer glass bulb 8.

Fig. 3 is the electrode structure of this lighting device mesohigh sodium vapor lamp.The 12nd, the external spiral of electrode, the 13rd, the inside spin of electrode, the 14th, electrode core bar.The internal and external screw of a is that the inside spin 13 of b is double helix tungsten filaments with the continuous coiling of tungsten filament among the figure, and outer 12 is common helical tungsten filaments.Core bar 14 is tungsten bars.Dip-coating tungstates electronic emission material adopts Ba usually in the spiral space of a and b _1.8SrCa ₀.2wo ₆Their characteristics are that the thermal inertia of electrode is little, and b also has the electronic emission material of storing many, the advantage that electrode life is long.

The course of work of lighting device is described in detail in detail in conjunction with Fig. 1 Fig. 2: power supply phase line and the stack startup high-voltage pulse that is produced by electronic trigger S thereon passes through lamp holder 1, bracing frame 4 is added on the termination electrode 5 of discharge tube, also be added on the assistant starting silk 7 by bimetal release 3 simultaneously, the zero line of power supply is added on the other end electrode 9 of discharge tube 6 by the contact 11 of lamp holder.Like this, the space between electrode 9 and assistant starting silk 7 produces a very strong electric field, and high-pressure xenon is very fast breakdown.Because the electric field guide effect of assistant starting silk 7, discharge is carried out between electrode 5 and 9 immediately, and this moment, high-pressure xenon can be set up the bulb voltage of about 40V.After high-pressure xenon was breakdown, electronic trigger S promptly quit work at once.The very fast rising of temperature that great start-up current that special-purpose ballast B provides and the little thermal inertia of electrode make electrode 5 and 9, the very fast vaporization of sodium amalgam in the discharge tube 6, strengthened the reactance of discharge tube, bulb voltage rises, and the vapour pressure of mercury and sodium all reaches capacity till the state in discharge tube.Bimetal release 3 is out of shape under discharge tube 6 thermal-radiating effects, and assistant starting silk 7 is opened from circuit interruption.Getter 2 and 10 can make the vacuum degree in the outer glass bulb 8 reach 10 ^-4Pa does not reduce because of gas heat conduction with the temperature that guarantees electric arc tube.

High xenon pressure has been set up higher bulb initialization voltage, little thermal inertia and big starting current are accelerated the rising of electrode temperature, sodium amalgam in the discharge tube promptly is vaporized at short notice and reaches stable saturated steam pressure condition, bulb enters stable state very soon.

Claims (3)

1, a kind of lighting device, formed by high-pressure sodium lamp, ballast, electronic trigger and compensation condenser, wherein high-pressure sodium lamp is made up of discharge tube, outer glass shell, lamp holder, bracing frame, bimetal release, assistant starting silk, getter, electrode etc., it is characterized in that discharge tube adopts the coreless armature of the continuous coiling of ectonexine, or the employing internal layer is that the double helix skin is the electrode of common spiral.

2, lighting device according to claim 1 is characterized in that being filled with in the discharge tube high-pressure xenon that pressure is 20～40KPa.

3, lighting device according to claim 1 is characterized in that it is the inductance type ballast of 1.8～2.2A that ballast adopts starting current.

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