CN207134326U - Discharge lamp - Google Patents

Abstract

The utility model offer is a kind of to be contacted so as to suppress the Cooper-Hewitt lamp that service life shortens by suppressing heater winding with insulation division.According to embodiment, discharge lamp radiates ultraviolet, and the discharge lamp has luminous tube and electrode, and electrode has：Coil portion, the both ends of luminous tube are arranged on along the bearing of trend of luminous tube；Multiple connecting portions, it is connected to the both ends of coil portion；Insulation division, it is arranged on around the connecting portion being connected with one end of coil portion, and coil portion winding is arranged on the outside of insulation division；Buffer part, it is arranged between insulation division and connecting portion.

Description

Discharge lamp

Technical field

Embodiment of the present utility model is related to a kind of discharge lamp.

Background technology

For example, in water treatment field, as the light source for purposes such as sterilizations, a kind of mercury vapor lamp is disclosed.Especially, make For light source, a kind of Cooper-Hewitt lamp is disclosed.

Patent document 1：Japanese Unexamined Patent Publication 7-240172 publications

Patent document 2：Japanese Unexamined Patent Publication 6-084498 publications

In Cooper-Hewitt lamp, in order to realize big light quantity, it is necessary to make high current flow through filament.In order to make high current Flow through filament and realize longer service life, therefore, to assure that be coated on the coating of the electronic emission material (emitter) of filament Amount.For this reason, it may be necessary to use so-called triple heater windings (Triple Filament Coil).If triple heater windings edge is sent out The bearing of trend of light pipe is set, then may result in and be connected to the wire of filament and contacted with heater winding, so as to produce short circuit.For Short circuit is prevented, is provided with the insulation divisions such as quartz ampoule on wire.

However, insulation division is not fixed in the cross-wise direction vertical with the bearing of trend of lamp, therefore vibrating Or when changing lamp, insulation division contacts with heater winding sometimes.The heater winding contacted with insulation division can transmit heat to insulation division Amount, therefore, the temperature of heater winding can decline, and this can cause electronic emission material to become easily to disperse, and eventually result in lamp Service life shortens.

The content of the invention

Embodiment of the present utility model provides one kind and contacted by suppressing heater winding with insulation division so as to suppress to use The Cooper-Hewitt lamp of the lost of life.

According to embodiment of the present utility model, discharge lamp radiates ultraviolet, and the discharge lamp has luminous tube and electrode. Electrode has：Coil portion, the both ends of luminous tube are arranged on along the bearing of trend of luminous tube；Multiple connecting portions, are connected to line The both ends in circle portion；Insulation division, it is arranged on around the connecting portion being connected with one end of coil portion, and coil portion winding is arranged on The outside of insulation division；Buffer part, it is arranged between insulation division and connecting portion.

According to embodiment of the present utility model, using the teaching of the invention it is possible to provide it is a kind of contacted by suppressing heater winding with insulation division so that Suppress the Cooper-Hewitt lamp that service life shortens.

Brief description of the drawings

Fig. 1 is illustrative for the schematic diagram of the discharge lamp involved by the 1st embodiment.

Fig. 2 is illustrative for the enlarged drawing of the main electrode 22 of the discharge lamp 1 involved by the 1st embodiment.

In figure：1- discharge lamps；10- luminous tubes；12- discharge spaces；The most cold portions of 14-；16- mercury；18- sealings；20- electricity Pole；22- main electrodes；24- auxiliary electrodes；26- stems；28- outside leads.

Embodiment

Discharge lamp 1 involved by embodiments described below radiates ultraviolet, the discharge lamp 1 have luminous tube 10 and Electrode 20.Electrode 20 has：Coil portion, the both ends of luminous tube 10 are arranged on along the bearing of trend of luminous tube 10；Multiple connecting portions 22b, 22b, it is connected to the both ends of coil portion；Insulation division 22c, it is arranged on the connecting portion 22b being connected with one end of coil portion Around, and coil portion winding is arranged on insulation division 22c outside；Buffer part 22d, it is arranged on insulation division 22c and connecting portion Between 22b.

According to present embodiment, heater winding can be suppressed and contacted with insulation division.

Also, in the discharge lamp 1 involved by embodiments described below, buffer part 22d is arranged on insulation division 22c's Both ends.

According to present embodiment, it can preferably suppress heater winding and be contacted with insulation division.

Also, in the discharge lamp 1 involved by embodiments described below, if by insulation division 22c length be set to L, Buffer part 22d length is set to D, then D is the 5%~20% of L.

According to present embodiment, it can preferably suppress heater winding and be contacted with insulation division.

Also, in the discharge lamp 1 involved by embodiments described below, buffer part 22d has metal foil.

According to present embodiment, it can preferably suppress heater winding and be contacted with insulation division.

Hereinafter, referring to the drawings, the various embodiments of the utility model is illustrated.

(the 1st embodiment)

Below, the discharge lamp involved by the 1st embodiment is illustrated using Fig. 1.Fig. 1 is exemplified with discharge lamp 1.

As shown in figure 1, discharge lamp 1 involved by present embodiment has luminous tube 10 and is arranged on the two of luminous tube 10 The electrode 20,20 at end.

In the present embodiment, as discharge lamp 1, exemplified with the embodiment for the discharge lamp for having used luminous tube 10.

Multiple luminous tubes 10 are formed as U-shaped, have discharge space 12 in the inside of luminous tube 10.Also, in luminous tube 10 both ends, electrode 20,20 is sealed with via stem 26,26, thus, discharge space 12 remains airtight.Luminous tube 10 is by saturating The material (for example, quartz glass) for crossing ultraviolet is made.The external diameter of luminous tube 10 is 29mm, internal diameter 27mm, length of illumination (hair Light pipe 10 the distance between from a lateral electrode 20 to another lateral electrode 20) be 1200mm.

If apply electric power, electrode 20,20 from external power source (not shown) to the electrode 20,20 for being arranged at discharge space 12 Electronics is radiated, discharge space 12 will light.

Gas is sealed with discharge space 12.The inclosure pressure of gas is, for example, 10 (kPa)~100 (kPa).Gas can be with It is the mixed of the two or more gases in a kind of gas or above-mentioned gas in inert gases such as argon gas, Krypton, xenon etc. Close gas.In addition, the halogens such as mercuric iodixde can also be enclosed in gas.

Most cold portion 14 is that luminous tube 10 lights the minimum position of middle temperature, is the position that mercury 16 described later condenses.Most cold portion 14 are arranged on the substantial middle of the bent portion for the luminous tube 10 for being formed as U-shaped.

Mercury 16 is enclosed in the most cold portion 14 of luminous tube 10.Wherein, a part of mercury 16 become after steam as gas enclose in In discharge space 12, and by the electric discharge between electrode 20 and electrode 20 and luminous.Mercury 16 is for example sealed with 100mg.In addition, Mercury 16 can also be the mercury alloy for including the metallic element (for example, the metal such as bismuth, tin, indium, lead) beyond mercury.

Sealing 18,18 is formed at the both ends of discharge space 12.Sealing 18,18 by with the identical quartz glass of luminous tube 10 Glass is made.Sealing 18,18 is formed as follows：Fired after electrode 20,20 to be arranged on to desired position using coal gas (not shown) The melting instrument such as burner is melted so that luminous tube 10 is sealed and formed.In addition, sealing 18,18 can also by with luminous tube 10 different quartz glass etc. are made.Also, can also be using (being melted by the melting instrument such as gas burner (not shown) Melt, and be molded using molded component (not shown)) so-called compression Sealing Method forms sealing 18,18.Sealing 18th, 18 length is, for example, 80mm.

Electrode 20,20 has：Main electrode 22,22；Auxiliary electrode 24,24；Stem 26,26；Outside lead 28,28.

Main electrode 22,22 applies electric power to discharge space 12.Main electrode 22,22 is configured to be arranged in discharge space 12. On the detailed content of main electrode 22,22, be explained below.

Auxiliary electrode 24,24 is arranged on the inner side that discharge space 12 is more leaned on than main electrode 22,22, and is applied to discharge space 12 Power up power.One end of auxiliary electrode 24,24 is arranged on the side of discharge space 12, the other end via stem 26,26 and outside lead 28, 28 connections.Auxiliary electrode 24,24 is for example made up of tungsten.The discharge lamp 1 of present embodiment is handed between main electrode and auxiliary electrode Discharged for producing.That is, in some cycle, it is being arranged at the main electrode 22 of a side seals 18 and is being arranged at another side seal Electric discharge is produced between the auxiliary electrode 24 in portion 18, and in another cycle, it is being arranged at the main electrode of another side seals 18 22 and it is arranged between the auxiliary electrode 24 of a side seals 18 and produces electric discharge.

Stem 26,26 is arranged at the inner side of the discharge space 12 at the both ends of luminous tube 10 and is sealed in luminous tube 10, thus, The discharge space 12 of luminous tube 10 remains airtight.Stem 26,26 is arranged to, the both ends of main electrode 22,22 and auxiliary electrode 24, 24 therethrough and with the external electrical connections of discharge lamp 1.Stem 26,26 is for example made up of quartz glass.

One end of outside lead 28,28 is connected with the both ends of main electrode 22,22 and one end of auxiliary electrode 24,24, outside The other end of portion's lead 28,28 is then connected with external power source (not shown).In addition, outside lead 28,28 the other end for example Terminal (not shown) can also be provided with.

Here, main electrode 22,22 is described in more details using Fig. 2.Fig. 2 is enlarged representation side main electrode 22 Figure.

Main electrode 22 has：Heater winding 22a (coil portion)；Connecting portion 22b, the 22b being connected with heater winding 22a；If It is placed in connecting portion 22b insulation division 22c；The buffer part 22d being arranged between connecting portion 22b outside and insulation division 22c.

By supplying the electric power from external power source (not shown), filament from the both ends of main electrode 22 to heater winding 22a Coil 22a radiates thermoelectron.Heater winding 22a is wound in connecting portion described later (side connecting portion) 22b and heater winding 22a One end be connected with side connecting portion 22b, the heater winding 22a other ends are then connected with opposite side connecting portion 22b.Heater winding 22a is, for example, after tungsten is wound in into coiled type, the coil wound to be wound again and forms so-called the three of triple windings Weight heater winding.In order to improve electronic radioactive, can be coated with heater winding 22a (not shown) such as barium, calcium, strontium Electronic emission material.

Connecting portion 22b electrically connects with heater winding 22a, so as to heater winding 22a supply electric powers.The one of connecting portion 22b End is connected with heater winding 22a, and the other end is connected via stem 26,26 with outside lead 28,28.Connecting portion 22b for example by Tungsten is made.

Insulation division 22c is arranged to not allow connecting portion 22b and heater winding 22a to make electrical contact with.Insulation division 22c is arranged on side company Around socket part 22b.The cylindrical shapes of insulation division 22c, insulation division 22c are for example made up of quartz glass.

Buffer part 22d is arranged between side connecting portion 22b and insulation division 22c.Buffer part 22d is for example arranged to be wound in Side connecting portion 22b.Buffer part 22d is for example made up of molybdenum foil.Buffer part 22d is for example arranged to, and one end of molybdenum foil is welded and fixed In side connecting portion 22b, the other end is contained in cylindric insulation division 22c inside.Buffer part 22d is flexible, therefore, is inciting somebody to action In the case that buffer part 22d is contained in insulation division 22c inside, buffer part 22d contacts with insulation division 22c inner elastomeric, from And it can suppress to produce between side connecting portion 22b and insulation division 22c and rock.Thereby, it is possible to suppress heater winding 22a and insulation Portion 22c is because side connecting portion 22b producing and rocking between insulation division 22c with contacting.The part for forming buffer part 22d is not limited solely to Molybdenum foil.As long as example, foil-like metal (metal foil etc. made of tungsten), any material.Sum it up, regardless of Form, as long as it is capable of Elastic Contact insulation division 22c material.

Buffer part 22d uses the reason for foil-like metal as follows：First, buffer part 22d is required to weld with connecting portion 22b Connect, and as discharge lamp and using when require patience to hot environment.Also, buffer part 22d requirements are will Impurity brings in the material of discharge space 12.As the material for meeting above-mentioned condition, preferably metal.

Here, buffer part 22d size is illustrated.By insulation division 22c on the bearing of trend of luminous tube 10 In the case that length is set to L, buffer part 22d length D is preferably the 5%~20% of L.If D is less than the 5% of L, buffer part 22d elasticity capacity can decline, and this, which can cause to produce between connecting portion 22b and insulation division 22c, rocks, it is thus possible to can cause lamp Wire coil 22a contacts with insulation division 22c.On the other hand, if D is more than the 20% of L, it is difficult to that buffer part 22d company will be provided with Socket part 22b is inserted in insulation division 22c.Therefore, buffer part 22d length D be preferably insulation division 22c length L 5%~ 20%.

As described in the embodiment, according to present embodiment, by setting buffer part 22d around connecting portion 22b, And connecting portion 22b is arranged to insulation division 22c inside in the state of buffer part 22d is provided with, so as to suppress Produce and rock between connecting portion 22b and insulation division 22c, therefore, it is possible to suppress to produce between heater winding 22a and insulation division 22c Life is rocked, and can be suppressed heater winding 22a and be contacted with insulation division 22c.Thereby, it is possible to suppress the shortening of service life.

Also, according to present embodiment, by the way that buffer part 22d to be arranged on to insulation division 22c both sides, connection can be increased Contact area between portion 22b and insulation division 22c, it can preferably suppress to produce rolling between connecting portion 22b and insulation division 22c It is dynamic, rocked therefore, it is possible to suppress to produce between heater winding 22a and insulation division 22c, can suppress heater winding 22a with it is exhausted Edge 22c is contacted.Thereby, it is possible to suppress the shortening of service life.

Also, according to present embodiment, because buffer part 22d has metal foil, therefore connecting portion 22b and insulation can be made Portion 22c is more flexibly contacted, and is rocked so as to further suppress to produce between connecting portion 22b and insulation division 22c, because This, can suppress to produce between heater winding 22a and insulation division 22c and rock, can suppress heater winding 22a and insulation division 22c is contacted.Thereby, it is possible to suppress the shortening of service life.

More than, some embodiments of the present utility model are illustrated, but these embodiments are merely illustrative, The intention of utility model scope is not limited.These new embodiments can by it is other it is various in a manner of implement, do not departing from In the range of the utility model aims, various omissions, displacement, change can be carried out.These embodiments or its variation belong to In the scope of the utility model or objective, and it is also contained in the utility model described in technical scheme and its equivalent scope It is interior.

Claims (4)

1. A kind of 1. discharge lamp, it is characterised in that

   The discharge lamp radiates ultraviolet,

   The discharge lamp has luminous tube and electrode,

   The electrode has：Coil portion, the both ends of the luminous tube are arranged on along the bearing of trend of the luminous tube；Multiple connections Portion, it is connected to the both ends of the coil portion；Insulation division, it is arranged on the connecting portion being connected with one end of the coil portion Around, and coil portion winding is arranged on the outside of the insulation division；Buffer part, be arranged on the insulation division with it is described Between connecting portion.
2. 2. discharge lamp according to claim 1, it is characterised in that

   The buffer part is arranged on the both ends of the insulation division.
3. 3. discharge lamp according to claim 1 or 2, it is characterised in that

   If the length of the insulation division is set into L, the length of buffer part is set to D, D is the 5%~20% of L.
4. 4. discharge lamp according to claim 1 or 2, it is characterised in that

   The buffer part has metal foil.