CN2033261U - Protective ocular of a electric welding helmet - Google Patents
Protective ocular of a electric welding helmet Download PDFInfo
- Publication number
- CN2033261U CN2033261U CN 88209863 CN88209863U CN2033261U CN 2033261 U CN2033261 U CN 2033261U CN 88209863 CN88209863 CN 88209863 CN 88209863 U CN88209863 U CN 88209863U CN 2033261 U CN2033261 U CN 2033261U
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- eye lens
- light valve
- protective eye
- crystal light
- 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.)
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Abstract
The utility model discloses goggles of an electric welding helmet which adopts a liquid crystal light valve in the type of the magnetic induction. An electric welder outputs the electromagnetic waves generated by the product welded contacted with an electric welding rod through the induction of the magnetic induction head and through the enlarging shaping detection waves of an integrated circuit with low voltage and low consumption to drive the discoloring of the liquid crystal light valve, so as to obtain the purpose of protecting eyes in the way of the discoloring of exceeding arc light.
Description
This utility model belongs to the essential appliances for labor protection of human lives.
Anti-protective eye lens is the vitals of electric welding protective helmet, and it can protect electric welder's eyes to exempt from burning of arc light and welding slag, improves electric welding work efficiency and weldment quality.The anti-protective eye lens that DRP communique DE 3425977 " protective helmet of welding usefulness " is provided; be to insert cover glass, glass for bonding and adjustment glasses at the bearing that protrudes eyepiece to form, its glass for bonding reaches the purpose of protecting eyes by the gap length that driving shaft moves sheet glass.Occurred the anti-protective eye lens of opto-electronic conversion formula liquid crystal light valve in recent years, before the welding, this eyepiece is transparent, and the operator can see the welding thing clearly; During welding, eyepiece is opened liquid crystal light valve by opto-electronic conversion control, reaches shading and protects the purpose purpose.Because mechanical action or opto-electronic conversion have a process, make operator's eyes still have the intense stimulus of moment.
The purpose of this utility model provides a kind of anti-protective eye lens of induction liquid crystal light valve of leading arc light variable color, and operator's eyes are subjected to the stimulation of moment when welding to eliminate.This utility model converges electromagnetic induction head, electronic drive circuit, liquid crystal light valve and is fitted together; the electromagnetic wave that the operator produces during with welding rod Contact welding thing; reception by the electromagnetic induction head; the amplification of electronic drive circuit, shaping, detection, comparison; drive liquid crystal light valve and before electro-welding arc takes place, open variable color, reach the purpose of the automatic shading protection of leading arc light variable color eyes.
This utility model can be installed dissimilar electromagnetic induction heads on anti-protective eye lens.For DC arc welder, the beryllium that the line bag preferably is wound on platypelloid type is not on the alloy-iron core; For ac arc wedling machine, the line bag preferably is wound on the high frequency ferrite bar.Any electromagnetic induction head all can be common to AC ﹠ D. C. arc welding machine.When weldment in one meter of anti-protective eye lens, can make anti-protective eye lens operate as normal by adjusting knob.
Electronic drive circuit of the present utility model can adopt dissimilar chips to form.
Adopt the special HCC/HCF type chip of Italian SGS company, its work process is shown in the circuit diagram of the block diagram of Fig. 1 and Fig. 2, the electromagnetic induction head 1. receive the electromagnetic wave that the induction arc-welding machine produces and be transported to highly sensitive linear amplifier 2. (1/4 40936B integrated circuit) amplify, Si Mite shaping circuit 3. (1/4 40936B integrated circuit) carries out shaping with amplifying signal, the 4. detection of (1/4 40936B integrated circuit) of signal process cymoscope through shaping, deliver to wave converter 5. (1/4 40936B integrated circuit) again, signal voltage that 5. wave converter is exported and standard capacitance box 6. (1/4 40937B integrated circuit) normal voltage magnitude comparator 7. (1/4 40937B integrated circuit) compare, when external signal voltage overgauge voltage, open liquid crystal light valve, make the 8. variable color of LCD variable color eyepiece at once.The said process required time depends mainly on liquid crystal light valve and opens speed, and it is usually within 100 milliseconds.And the generation of electro-welding arc, all after welding rod contact weldment generates electromagnetic waves more than 100 milliseconds, therefore, this induction liquid crystal light valve prevent protective eye lens, is to be ahead of arc light variable color takes place to open before, has also just protected eyes effectively.
The chip 40937B 11 terminal E of Fig. 2 are test points of standard signal voltage, and the terminal 14 of integrated circuit 40937B and 40936B connects positive source, and 7 terminals connect power cathode by on and off switch.
Use homemade CMOS chip, its work process is shown in Fig. 3 block diagram and Fig. 4 circuit diagram, electromagnetic induction head (11) receives the electromagnetic wave of induction arc-welding machine generation and is transported to linear amplifier (12) (13) (14) and carries out three grades of amplifications (every grade is all utilized a not gate of 1/6 CD4069 or 1/6 C033 integrated circuit to make alternative current amplifier), signal after the amplification is through the detection of cymoscope (15) (thick film circuit HC210), pass through the shaping of shaping circuit (16) (1/4 CD4070 or 1/4 C036 integrated circuit) again, the signal superposition that is transported to control gate (17) (1/4 CD4070 or 1/4 C036 integrated circuit) and standard capacitance box (18) (1/2 CD4096 or 1/2 C033 integrated circuit) is as the signal voltage that drives liquid crystal color-changing.CD4070 or C036 are different not gate arithmetic elements, when not having welding signal, it makes LCD variable color eyepiece (19) be pellucidity, is only coming then through the welding signal voltage after the CD4070 shaping, starter control gate (17), just making LCD variable color eyepiece is black by transparent transition.
The operating current of foregoing circuit is the 140-150 microampere when static state, is being the 150-155 microampere dynamically, and promptly institute's consumed current is very little, its power consumption W=IV＜=160(microampere) * 3(volt)=the 480(microwatt).This is owing to adopted the integrated circuit of little voltage low in energy consumption to reach, therefore, be exactly that power supply is connected always, two 1.5V button cells also can use 1 year, and made electromagnetic induction head, electronic drive circuit, liquid crystal light valve, button cell all can converge to be contained in the anti-protective eye lens of the electric welding helmet.
Claims (3)
1, a kind of anti-protective eye lens of the electric welding helmet that uses the electric drive liquid crystal shading, it is characterized in that: electromagnetic induction head, electronic drive circuit, liquid crystal light valve converge and are fitted together, and utilize the electromagnetic induction head to form the anti-protective eye lens that liquid crystal light valve takes place to open before leading arclight.
2, anti-protective eye lens electromagnetic induction head according to claim 1 is characterized in that: line holds built in the beryllium of platypelloid type not on alloy-iron core or the ferrite bar.
3, anti-protective eye lens electronic drive circuit according to claim 1 is characterized in that: select for use the integrated circuit of Low-voltage Low-power button cell power supply to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88209863 CN2033261U (en) | 1988-08-01 | 1988-08-01 | Protective ocular of a electric welding helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88209863 CN2033261U (en) | 1988-08-01 | 1988-08-01 | Protective ocular of a electric welding helmet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2033261U true CN2033261U (en) | 1989-03-01 |
Family
ID=4843428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88209863 Withdrawn CN2033261U (en) | 1988-08-01 | 1988-08-01 | Protective ocular of a electric welding helmet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2033261U (en) |
-
1988
- 1988-08-01 CN CN 88209863 patent/CN2033261U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |