DE2361982A1 - PROTECTIVE DEVICE FOR THE RESPIRATORY ORGANS AGAINST AEROSOLS - Google Patents

Description

SGHHTZF0SHICH2IMG FOR THE RESPIRATORY ORGANS

GSGSIi 11R0S0L1

Dia present invention relates © alcfe to protection devices ,, in particular Senate zvorr iaht wear for Ätmungs bodies against harmful ingffiff of aerosols _β

The Srf indimg raird Zü0ckchten @ Era © is © when welding with high-performance electrodes powder wires when welding huminium-magnetic alloy © n _s ¥ on brass, steel with ■ preheating. Warms eh® e eat from GuB®is®n _g at. Welding of zinc-containing metals and zinc-coated sawnings as well as © with automatic taadl semi-automatic welding in a protective gas atmosphere, etc.! applied under bollards. -

In addition, di @ invention is also used appropriately in all procedures of Aaftragschweilksng, in many plumbing

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method exploited where gases and aerosols enter the breathing zone of the worker, as well as when applying different types of coating layers that contain harmful substances, and wherever there is a risk that the harmful substances will penetrate into the worker's breathing zone.

During the welding process, the metal and the slag heat up to the higher temperatures and evaporate very intensely. To prevent gases and aerosols from entering the welder's breathing zone. ¥ @ Ea © iden, if a local negative pressure ventilation is used * Jedocli is the local © ventilation nor aa fixed Arfoelfcsplät ^ an effectiveeamβ

! fell © SeJiweiBeff eaistexnen sicJh. at their work faiemliels.

far. In solefeen cases, such ¥ orrichtojigen sum removal 7021 gases and aerosols such as extractors built into the holder, movable extractors of small dimensions, a device that works by blowing conditioned air into the breathing zone of the welder, etc. The protective device mentioned is to protect the respiratory organs des Operator S ⁶ S ⁶²¹ aerosols and contains a protective shield with a light filter and a perforated drill hole for supplying air into the device, which is connected to a compressed air line at one of its front ends via a hose (see Pa-

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US letter of approval Mr. 2 469 273 ₅ Klo2-8 ₈ from 22

When using the protective device mentioned, ®ir <3 the respiratory organ® of the worker is conditioned under pressure in a current he supplied air j which has harmful effects, `` because it affects the face

skin caused air burn wounds

The presence in the device conditioned ^^ ¹ air also brings with it a whole range of inconveniences that are caused by the preparation of air and the use of air.

The aim of the present invention is to eliminate the sewing parts mentioned

The task of the invention is © zagrunde _s © in © protective door

the
Direction for ^ respiratory organs of a worker - against Aerosol® with such an arrangement of the perforated Hohr © s-? u © ntraiekernj äaroh that any harmful, biologically © linfliaß d®r conditioned air on the surgeon is avoided

The objective is achieved by eine.Schutzvorrichtung * Respiratory an operator against! © rosol © g © solves the _e a shield with light filters and © in inen on his © end to a compressed air line. ¥ ®rbuiadenes perforated drilling contains j in which according to the invention the perforated ear is arranged on the outside of the protective shield under the light filter, has a length ₉ at least that of the light filter

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is the same, and is closed at its other end.

Because the perforated hole for air supply is on the outside of the Sehatzschild is arranged, penetrates from the holes d * s pipe flowing out © air not into the breathing zone of the Surgeon.

This arrangement gives the possibility "to

Protection against aerosols requires purified air use what in turn is the harmful® biological action who lets conditioned air on the fans by the damage to the facial skin becomes atisgaseiilössexi *

In addition, the L is often a of ohs required in the device Equipment very simplified Di © otherwise necessary

Flow-through Filtep, preheater, Mischvorriehtusgerij. ν diameter are unnecessary, and also the preparation of conditioned air, an air cleaner is omitted Kslöhe, Trookn! ₉ mg Torwärmung, mixing j includes control, etc..

In order to achieve the best conditions at® Sohwelßvorgaag sa, the perforated pipe should be arranged in such a way that its holes are directed at an angle of 0 to 60 ° from the light filter plane.

If the drill holes are at an iron angle, an angle greater than 60 ° the air flowing out of these holes can get into the zone of the welding arc and the welding process affect.

The invention is described below by

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Writing of an example of execution and the enclosed Drawings explained in more detail 5 'it aeigen

Fig. ₀ 1 front view of the protective device according to the invention for the respiratory organ © of a surgeon against. Aerosols $

Figo 2 side view of the same device!

Figo 5 perforated drill with attachment point on the air supply im lall® of a SchutEmafeke, partly © aosge sennit ttnf.

Figo 4 perforated pipe with connection piece e.g. air supply in the case of a protective shield, partially cut out

Figo 5 Scheme of the distribution of the aerosol streams wr rims of the device according to the inventionξ

Figo 6 the same for application of the invention

It is © ine Longs orrichtusg zv for di © Atmungsorgan.®

b © ispielsi @ is @ © ines Sehraelßere g @ g @ n Asrosol © suggested j di © himself for example ^ aii® ^ älirend der Schw @ ißuag when melting the Sohraeißguts and the zu? © rsGh® @ iß @ nd @ n Develop material ©.

The Sehutsforriohtung can be used both in Fora ®in®r Schatz · »= · mask as auoh einer Sehntg®chili @ s aysgüführung ^ ® £ ä® & o

Bie protection device includes in © @ n showcase 1 (FIG _e l) in which © in Liehtfilter 2 ¥ © org see © a isto An-1 of the AüBenseita of Schutzkastena under d®m light filter 2 © © in ird geloch-.

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2381982

tes tube 3 is arranged, which is connected via a rubber chi 4 with a not visible from the drawing Bruckluf tie it ung . The perforated drill 5 is used to supply air into the protective device. The tube 3 is arranged in such a way that its holes 5 are directed to the plane of the Liehfef liter 2 at an angle cc (Pig. 2) of 0 to 60 °, which means an angle close to 90 ° with respect to the developing aerosol flow .

Bas punched © Bohr 5 has a Läag® which is about equal to or slightly greater than di © length the Lichtfilter® 2, wöim? Efe a safer Wegfiilirujig of Aesoaalstnoma of the Longs smaske mad thus aaoii% ⁷ oa ü®n Ätmungsorgaaen the surgeon is possible®

The perforated pipe 3 is _s is welded to the Sehntzkasten 1 with auxiliary © of bracket 6 and Matts 7 (FIG _e 1) © ü®% of a stud bolt S (3Pig "3" 4) _f olis sä perforated Bohr 5 befest IGT · Dar üa.ß gsloolite Bohr 3 with a compressed air line verbiaä®ad € Scnlanch 4> is attached to the Söhntz box 1 with the help of a bracket 9 ″ and rivets 10 (Fig. 1).

The Eohr 3 can either at both ends, for example by one. Tube closure, then its connection with a compressed air line is brought about via a connection nozzle 11, which can be welded to any point of the tube 5, as can be seen from Fig. 3 , or can be closed at one end whose disposition

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connection with a Druekluftleitung over the other © Hohr <sade, to which a Anchi aß stub 12 welded wteeüs i? i © this in Fig; 1 is indicated ₉

The protective device is made of light metals or materials (aluminum, Dural ₉ ' _{plastic® a 0} a _o m _o ) o Basically the entire protective device is o® after um. use. Material - 20 to 40 g.

During work, the air flows in the peeping view ö © e ignition of the welding arc at a pressure of 1 atm to 3 or even more depending on the Arbe its ratio from ü®n $ holes of the perforated pipe 5 at a SQ ⁰ naJb, ®n angle to the ascending column of the sweat aerosol developing in the welding © and drives the concentrated aerosol flow back from the worker to a safe distance · '- -

In Fig. 5 there is a spread of the flow of aerosols during the welding process without using the inventive method Protective device illustrates »Ιΐί this

the

the perforated tube is arranged on the inside of the tendon box, and conditioned air enters the respiratory son © immediately the worker, in, "

FIG. 6 illustrates the distribution of the current of aerosols when carrying out the welding process, application the proposed protective device in the case of the perforated tube J attached to the outside of the protective box 1

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is arranged, and the air under pressure drives at their exits from the holes 5 the current vo '& aerosols and gases away from the welder.

The welding aerosol cools down while it _s is partially separated and discharged through the room ventilation. The hygienic inspections carried out at the Kieyger Institute for Industrial Hygiene and Occupational Diseases have shown that the aerosol and gas content in the welder's breathing zone is significantly lower than the maximum permissible concentrations when the protective device is used.

Thus ζ · Β · is at the welding together of large ^ Zinklaezigea containing alloys in the breathing zone of the welder when using a SchutzmaskM without the inventive protection device d © r dust content of 28 mg / rar and application of the proposed Sohutzvorriokfeang only 0.4 mg / nr _#

Operational trials have confirmed the high effectiveness of the protective device. Further advantages of the protective device according to the invention ^are also its simplicity, easy mobility, and cheapness of the materials used. ■■.

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Claims (1)

the
ohu.tzvorrich.ttms for "respiratory organ © © ines worker against aerosol © 8 which contains a drawer with a light filter and a perforated tube ₉ which is connected to s © in © m © inen lad © via a hose with "© inar ^ aekluft line, <3 _a labeled ieh η © t, that the perforated © tube (3) is arranged at <ä®i? exterior of Sehntakastens (1) under ü © m © Lichtf ilt r (2) j sine length aufraelatp at least ä®s Läng® of the light filter (2 ) is equal to ₈ and on his andsr © n lad © is completed ο 2 ο protection device according to claim! ,, characterized in that the perforated © Bohr (5) is arranged in such a way ₉ that its holes (5) uat © r a Winfeel ai from 0 to §0 ° to the plane © d © a light filter (2) 50.9827 / 0315