CN2311771Y - Fluorescent penetrating inspection lamp discharge tube - Google Patents
Fluorescent penetrating inspection lamp discharge tube Download PDFInfo
- Publication number
- CN2311771Y CN2311771Y CN 97239053 CN97239053U CN2311771Y CN 2311771 Y CN2311771 Y CN 2311771Y CN 97239053 CN97239053 CN 97239053 CN 97239053 U CN97239053 U CN 97239053U CN 2311771 Y CN2311771 Y CN 2311771Y
- Authority
- CN
- China
- Prior art keywords
- discharge tube
- inspection lamp
- penetrating inspection
- radiator
- fluorescent penetrating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a fluorescence crack detection lamp discharge tube used in a non-destructive test. The utility model, which is composed of a tube body, a main electrode and an auxiliary electrode, is characterized in that the interelectrode distance and the caliber size of the discharge tube are enlarged, and mercury-injecting quantity is reduced so that the unit load of a tube cavity is decreased, and the pressure of mercury vapor is reduced. Structurally, core poles of the electrodes extend out of a radiator with a certain length so that a free layer of molecules is shortened; the collision rate is increased; the restoring rate of barium zirconate of an electron emission object is increased; the consumption of the barium zirconate is reduced so that the service life is extended.
Description
The utility model relates to the fluorescent penetrating inspection lamp discharge tube that uses in a kind of Non-Destructive Testing.
The fluorescent penetrating inspection lamp is a kind of 3650 millimicrons of single ultraviolet B radiation illuminators, be mainly used in industries such as metallurgy, machinery, aviation and do surperficial Non-Destructive Testing, also can be used for textile industry and make chemical fibre detection usefulness, fluorescent penetrating inspection lamp commonly used is on the basis of high-pressure mercury fluorescent lamp, by using the black light glass cell-shell of special formulation, the elimination visible light is made (because visible light disturbs flaw detection); The fluorescent penetrating inspection lamp requires ultraviolet ray (3650 millimicrons of wavelength) intensity maximum, and visible light is as far as possible little, even is zero, and therefore, it is the difficult problem place that the fluorescent penetrating inspection lamp is made that uitraviolet intensity height, white light intensity are hanged down.Fluorescent penetrating inspection lamp discharge tube commonly used is continued to use high-pressure mercury fluorescent illumination discharge tube because of it, it is annotated, and the mercury amount is excessive, and promptly annotating the mercury amount is 15～22mg, and die opening h and caliber φ are too small, be that h is 30～35mm, φ is 0.9 ± 0.05mm, causes the tube chamber unit load excessive, and mercury vapor pressure is too high, working temperature is too high, reach more than 600 ℃, send visible light during work in a large number, and ultraviolet light relatively a little less than.This shows that existing discharge tube is as the advantage of lighting use, just is the defective that need overcome during as detection applications; Too high because of working temperature, the stem stem in the central electrode stretches out from radiator, and the compound probability of electron emission substrate barium zirconate is little, and barium zirconate consumption is many, so influence serviceable life.
The purpose of this utility model is to overcome above-mentioned shortcoming, and 3650 millimicrons of stronger wavelength ultraviolet lights of a kind of radiation, more weak visible light, the fluorescent penetrating inspection lamp discharge tube of long service life are provided.
The technical solution of the utility model is to strengthen the die opening h and the caliber φ of discharge tube, reduces and annotates the mercury amount, thereby the tube chamber unit load is reduced, and mercury vapor pressure reduces, working temperature reduces, and the stem stem of electrode is stretched out certain-length h from radiator
1, the average free layer of molecule is shortened, the collision probability increases, and the compound probability of electron emission substrate barium zirconate increases, and barium zirconate consumption descends, thereby increases the service life.Produce the manufacturing of optical radiation principle when discharge tube utilizes electric current to pass through mercuryvapour, by the physical characteristics of arc discharge as can be known, select suitable parameters, can make the radiation of required wavelength realize peak response, and making other wavelength avoid peak region, radiation is as far as possible little, even is zero.Characteristics such as the luminescence efficiency of discharge tube and spectral power distribution all with the operating air pressure of discharge tube, inner tube structure is relevant, the tube chamber unit load of mercury vapor pressure is a very important parameters, it has determined the electrical characteristics of lamp and the performance of discharge mechanism.The characteristic parameter of this fluorescent penetrating inspection lamp discharge tube is as follows:
Mercury vapor pressure 0.1～0.3MPa in the pipe, bore φ 10～12mm,
The arc length mercury amount 0.8～1.8mg/cm of unit, tube chamber unit load 5～6.5w/cm
2
Total mercury amount 10～12mg that annotates, die opening h45～60mm,
Stem stem extension elongation h
10.1～1.5mm.
The utility model strengthens approach such as bore and die opening by suitably reducing total mercury amount of annotating, and the mercury vapor pressure of discharge tube is reduced, and the positive column is strengthened, and effectively increases between the luminous zone, has realized above-mentioned purpose.Simultaneously, reduction along with mercury vapor pressure, working temperature also drops to about 400 ℃, the electrode stem stem stretches out from radiator in addition, the average free layer of molecule is shortened, and the probability of collision increases, and the compound probability of electron emission substrate barium zirconate increases, barium zirconate consumption descends, thereby discharge tube is prolonged serviceable life greatly.The experiment proved that, use this discharge tube, fluorescent penetrating inspection lamp white light intensity is lower than 20 Luxs, and greater than 2000 microwatts, 3650 millimicrons of medium wave UV intensity of fluorescent penetrating inspection lamp reach more than 1500 hours its serviceable life at 380 millimicrons of places of distance.
Below in conjunction with accompanying drawing the utility model is described in detail.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the electrode structure synoptic diagram.
Referring to accompanying drawing, fluorescent penetrating inspection lamp discharge tube is made up of quartz glass tube body 1, central electrode 2 and auxiliary electrode 3, and central electrode 2 is to comprise stem stem 4 and radiator 5 two parts.It is characterized in that the die opening h between the two ends central electrode 2 is designed to 45～60mm in the body 1, caliber φ is designed to 10～12mm, and the stem stem 4 on the central electrode 2 is to stretch out outside the radiator 5, its extension elongation h
1Be 0.1～1.5mm; Total notes mercury amount in the body 1 is 10～12mg, and unit arc length mercury amount is 0.8～1.8mg/cm.Radiator 5 is by outer bung flange 6, and barium zirconate 7 and interior bung flange 8 constitute, and promptly radiator 5 is sleeved on the stem stem 4.
Claims (2)
1, a kind of fluorescent penetrating inspection lamp discharge tube, it is made up of quartz glass tube body (1), central electrode (2) and auxiliary electrode (3), and central electrode (2) is to comprise stem stem (4) and radiator (5) two parts, it is characterized in that:
Die opening h between A, described quartz glass tube body (1) the two ends central electrodes (2) is 45～60mm, and the internal diameter φ of described quartz glass tube body (1) is 10～12mm;
Total notes mercury amount in B, the described quartz glass tube body (1) is 10～12mg, and unit arc length mercury amount is 0.8～1.8mg/cm.
2, fluorescent penetrating inspection lamp discharge tube according to claim 1 is characterized in that the stem stem (4) on the described central electrode (2) is to stretch out outside the radiator (5) its extension elongation h
1Be 0.1～1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239053 CN2311771Y (en) | 1997-10-23 | 1997-10-23 | Fluorescent penetrating inspection lamp discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239053 CN2311771Y (en) | 1997-10-23 | 1997-10-23 | Fluorescent penetrating inspection lamp discharge tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2311771Y true CN2311771Y (en) | 1999-03-24 |
Family
ID=33949179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97239053 Expired - Fee Related CN2311771Y (en) | 1997-10-23 | 1997-10-23 | Fluorescent penetrating inspection lamp discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2311771Y (en) |
-
1997
- 1997-10-23 CN CN 97239053 patent/CN2311771Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |