SE127407C1

SE127407C1 -

Info

Publication number: SE127407C1
Authority: SE
Publication date: 1949-01-01

Description

Uppfinnare: A. P. Shepard. Inventor: A. P. Shepard.

Prioritet begiircl frdn den olctober 1943 (Amerilcas forenia skier). Priority begiircl frdn the olctober 1943 (Amerilcas forenia skier).

Fbreliggande uppfinning avser en anordfling for sprutning ay i varme smaltande material. For delta andamal avsedda sprutor Oro konstruerade sa, att dylikt material inmatas i en smaltzon, dar det smaltes, varefter det utsprutas i finfordelad form ur sprutan medelst en strale av luft eller annan gas. Det material, som skall sprutas, kan inmatas i smaltzonen antingen i form av en stang eller trad eller i form av pulver. En blandning av brfinnbar gas och forbranningen underhallande gas, sasom exempelvis en blandning av acetylen eller propan och tuft eller syre, inmatas i smaltzonen genom lampliga kanaler, som utslappa den brannbara gasblandningen, som da den antandes astadkommer metallens smaltning. Om pulver anvandes, bander det ibland, att detta ej smaller fullstandigt, .eller att i vissa fall endast en del av pulvret smaller, eller att en del av pulvrets partiklar endast delvis smalta eller mjukna. I de fall, da en frac' eller en stang anvandes, riktas en kraftig lufteller gasstr5m mot det .smalta materialet vid spetsen air stangen eller traden pa sadant sat, att den med stor kraft traffar spetsen, varigenom den finfordelar detta material. Dylika for sprutning av i varme smaltande material aVsedda sprutor omfatta vanligen ett brfinnarmunstycke for gasen eller en brannarspets, som ãr forsedd med en materialet frammatande ledning och en mangfald kanaler for den brannbara gasblandningen, yilka foretradesvis omgi-va den frammatande ledningens axel, samt ett blastermunstycke, som omgiver brannarmunstycket och den framtnatande ledningen. Del Or en dylik konstruktion, som foreliggande uppfinning i forsta hand Miff& sig till. The present invention relates to a device for spraying ay in hot melt materials. Injectors designed for delta andamal Oro designed so that such material is fed into a melting zone, where it is melted, after which it is ejected in finely divided form from the syringe by means of a jet of air or other gas. The material to be sprayed can be fed into the melting zone either in the form of a rod or wire or in the form of a powder. A mixture of combustible gas and combustion-sustaining gas, such as a mixture of acetylene or propane and tuft or oxygen, is fed into the melting zone through lamp channels which release the combustible gas mixture which, when ignited, causes the metal to melt. If powder is used, it is sometimes cursed that this does not narrow completely, or that in some cases only a part of the powder narrows, or that some of the particles of the powder only partially melt or soften. In cases where a fracture or a rod is used, a strong air or gas flow is directed towards the molten material at the tip of the air rod or wire in such a way that it strikes the tip with great force, thereby atomizing this material. Such syringes for spraying hot melt materials usually comprise a gas burner nozzle or a burner tip which is provided with a material supply line and a plurality of channels for the combustible gas mixture, which preferably surround the axis of the feed line, and a blaster nozzle. , which surrounds the burner nozzle and the advancing line. Part Or such a construction, as the present invention primarily Miff & itself to.

Sprutor av ovan beskrivna typ Oro valkanda for metallsprutning, och av praktiska skill hanfor sig foljande beskrivning till olika konstruktioner av metallsprutor, varvid det är underforstatt, att uppfinningens princip Or tillampbar vid konstruktioner, som anvan da andra i varme smaltande material, exempelvis konstmassor. Syringes of the type described above are concerned with metal spraying, and of practical distinction the following description is given to various constructions of metal syringes, it being understood that the principle of the invention is applicable to constructions which use others in hot melting materials, for example artificial masses.

De hittills anvanda sprutorna, i vilka det i varme smaltande material, som skall sprutas, exempelvis Or en metall, hava en relativt lag sprutningshastighet och effektivitet och Oro utsatta far faran, att lagan slar tillbaka, d. v. s. att gasblandningen antandes inne i gaskanalerna eller i gasledningen. Sprutor ay denna typ erfordra for att arbeta tillfredsstallande, att man uppratthaller ett exakt forut bestamt tryckforhallande mellan den brannbara gasen och den forbrfinningen underhallande gasen. Detta har medf8rt, att noggranna regulatorer behova anvandas och att ansenlig omsorg maste iakttagas av den, som anvander sprutan, vid uppratthallandet av ett lampligt tryckforhallande mellan de tva gaserna. Om delta lampliga tryckforhallande ej uppratthalles, kommer Oven en relativt liten forfindring i antingen den brfinnbara gasens eller den forbranningen underhallande gasens eller badaderas tryck att fororsaka, att lagan vid spetsen av brannarmunstycket blir obalanserad ph sfi. sail, att det antingen blir ett overskott av brfinnbar gas eller ett overskott forbranningen underhallande gas alltefter forskjutningen i forhallandet. Detta obalanserade tillstand hos lagan fororsakar vasentligt reducerad sprutningshastighet och minskning i effektiviteten och i vissa fall Milder det, att lagan slar tillbaka in i brannarmunstycket. En annan nackdel hos hittills anvanda metalliseringssprutor Or det forhMlandet, att de erfordra en tillforsel ay brannbar gas mid ett relativt Mgt tryck, och om gasen ej tillfores under hogt tryck, kommer sprutan att antingen ej fungera ails eller ocksa. att arbeta med vasentligt minskad sprutningshastighet. A andra sidan Or det ofta olampligt att vid hogt tryck tillfora brannbar gas till en metalliseringsspruta. Exempelvis anses det vara forenat med risk att anvanda acetylen yid ett tryck Over 1 kg/cm' p0 grund av faran for acetylenens sanderdel- 2— — ning. Vidare tillforas vissa gaser vanligen ej vid hiigt tryck. Naturgas och kolgas, vilka emellanat anvandas for metalliseringssprutor, tillforas salunda vanligen vid relativt lagt tryck. Da dessa gaser anvandas for metalliseringssprutor, har det av denna orsak hit-tills varit nodvandigt, att en komplicerad och dyrbar kompressor installeras mellan gaskalIan och metalliseringssprutan for att hoja gastrycket till det for sprutan erforderliga vardet. The syringes used hitherto, in which the hot melt material to be injected, for example Or a metal, have a relatively low spraying speed and efficiency and are exposed to the danger that the layer will strike back, ie that the gas mixture ignites inside the gas ducts or in the gas line. . Syringes of this type, in order to operate satisfactorily, require that an exact predetermined pressure ratio be maintained between the combustible gas and the gas containing the fuel. This has meant that careful regulators need to be used and that considerable care must be taken by the person using the syringe when maintaining a suitable pressure ratio between the two gases. If delta lamp pressure ratios are not maintained, a relatively small refinement in either the combustible gas or the combustion gas or bath pressure will cause the layer at the tip of the burner nozzle to become unbalanced ph sfi. sail, that there will be either an excess of combustible gas or an excess of the combustion entertaining gas according to the displacement in the ratio. This unbalanced state of the law causes a substantially reduced spray rate and a decrease in efficiency and in some cases Milder causes the law to strike back into the burner nozzle. Another disadvantage of hitherto used metallization syringes is that they require a supply of combustible gas at a relatively high pressure, and if the gas is not supplied under high pressure, the syringe will either not work or not. to work with significantly reduced spray speed. On the other hand, it is often unsuitable to supply combustible gas to a metallization syringe at high pressure. For example, it is considered to be associated with the risk of using acetylene at a pressure above 1 kg / cm 2 due to the danger of the sand division of the acetylene. Furthermore, certain gases are usually not supplied at high pressure. Natural gas and carbon dioxide, which are occasionally used for metallization syringes, are thus usually supplied at relatively low pressures. Since these gases are used for metallization syringes, for this reason it has hitherto been necessary for a complicated and expensive compressor to be installed between the gas scale and the metallization syringe in order to increase the gas pressure to the value required for the syringe.

Foreliggande uppfinning avser nu en for I Orme smaltande material avsedd spruta, vilken undanrojer ovannamnda och aven andra nackdelar. Sprutan enligt uppfinningen tillater anvandandet av en f5rbranningen underhallande gas vid ett relativt Mgt tryck och en brannbar gas vid ett relativt lagt tryck. Den är dessutom forhallandevis okanslig for relativt stora variationer i nagon av eller ba.da gasernas tryck, d. v. s. det relativa kvantitativa forhallandet mellan den brannbara gasen och den forbranningen underhallande gasen i lagan forandras mycket obetydligt vid ,en relativt star forandring i gasernas tryckforhallande. The present invention now relates to a syringe intended for orme melting material, which obviates the above-mentioned and also other disadvantages. The syringe according to the invention allows the use of a combustion gas at a relatively high pressure and a combustible gas at a relatively low pressure. It is also relatively insensitive to relatively large variations in any or both of the gases' pressures, i.e. the relative quantitative ratio between the combustible gas and the combustion-sustaining gas in the law changes very insignificantly in the event of a relatively strong change in the gas pressure ratio.

Sprutan enligt uppfinningen her aven en minskad benagenhet for att lata lagan sla tillbaka samt en minskad benagenhet for att skadas eller sonderbrannas, om ett bakslag skulle intraff a. The syringe according to the invention here also has a reduced inclination unit to allow the layer to strike back and a reduced inclination unit to be damaged or probed if a setback should occur.

Dessa och andra kannetecken pa uppfinningen beskrivas mera fullstandigt i anslutning till bifogade ritning, som visar foretradesvis anvanda utfOringsformer av sprutan enligt uppfinningen. These and other features of the invention are more fully described in connection with the accompanying drawing, which shows preferably used embodiments of the syringe according to the invention.

Fig. 1 ãr en langdgenomskarning genom huvuddelen av en metalliseringsspruta enligt uppfinningen. Fig. 2 visar en sektion genom sprutan utefter linjeni fig. 1. Fig. 3 visar en annan sektion genom sprutan i fig. 1 utefter linjenFig. 4 visar sprutan i fig. 1 sedd i riktningen IV—IV. Fig. 5 är en langdsektion genom huvuddelen av en spruta enligt uppfinningen, visande vissa modifikationer i fraga om matarledningen. Fig. 6 är en langdsektion genom en del av metalliseringssprutan och askadliggor en foretradesvis anvand anordning. Fig. 7 visar den del, som visas i fig. 6 sedd i riktningen VII—VII. Fig. 8 visar en longdsektion genom en f5- retradesvis anvand detalj enligt uppfinningen. Fig. 9 visar en sektion genom ytterligare en detalj enligt uppfinningen. Fig. 1 is a longitudinal section through the main part of a metallization syringe according to the invention. Fig. 2 shows a section through the syringe along the line in Fig. 1. Fig. 3 shows another section through the syringe in Fig. 1 along the line Fig. Fig. 4 shows the syringe in Fig. 1 seen in the direction IV-IV. Fig. 5 is a longitudinal section through the main part of a syringe according to the invention, showing certain modifications in the matter of the supply line. Fig. 6 is a longitudinal section through a part of the metallization syringe and ash ladders a preferably used device. Fig. 7 shows the part shown in Fig. 6 seen in the direction VII-VII. Fig. 8 shows a longitudinal section through a detail used in accordance with the invention. Fig. 9 shows a section through a further detail according to the invention.

I fig. 1, 2, 3 och 4 betecknar 1 den metall, som skall sprutas och som Sr visad i form av en stang eller en trad. 2 Sr ett brannarmunstycke, genom vilket passera kanaler 3 for den brannbara gasblandningen. Munstycket 2 anligger med ett sate 5 gastatt mot en del 4 och fasthalles pa sin plats rnedelst en mutter 6, vilken fastskruvas pO. gangor 7 ph delen 4. Delen 4 dr forsedd med en konisk Mack 8, som passar i och vilar mot en konisk yta i huvudet 9 och fasthalles pa sin plats med hjalp av en mutter 10, som paskruvas pa. gangor 11 pa den utskjutande stutsen delen 4. Mutter. 10 Sr urtagen for att bilda mellanrum for en packning 12, som pressas tall mot den utskjutande stutsen pa delen 4 och mot bakre delen av huvudet 9, sa att en gastat tatning bildas mellan huvudet 9 och den. utskjutande stutsen pa delen 4. In Figs. 1, 2, 3 and 4, 1 denotes the metal to be sprayed and which Sr is shown in the form of a rod or a wire. 2 Make a burner nozzle, through which pass channels 3 for the combustible gas mixture. The nozzle 2 abuts with a seat 5 gas-tight against a part 4 and is held in place by a nut 6, which is screwed on. gangor 7 ph part 4. Part 4 is provided with a conical Mack 8, which fits in and rests against a conical surface in the head 9 and is held in place with the help of a nut 10, which is screwed on. aisle 11 on the protruding socket part 4. Nut. The recesses are formed to form spaces for a gasket 12, which is pressed pine against the projecting nozzle on the part 4 and against the rear part of the head 9, so that a gas seal is formed between the head 9 and it. protruding stub on part 4.

Delen 4 Sr forsedd med ringformade ytor, som tillsammans med de inre ytorna av huvudet 9 bilda fordelningskanaler 13 och 14 for gasen. Frdn fordelningskanalen 14 stracker sig ett relativt trangt spar 16 mat, d. v. s. mot delens 4 axel. Gaskanaler 15 aro anordnade i delen 4 och stracka sig fran fordelningskanalen 13 till sparet 16 i fordelningskanalen 14. Gaskanaler 17 aro aven anordnade i delen 4 och stra.cka sig fran sparet 16 till delens 4 framsida vid satet 5. Gaskanalerna 17 hava atminstone vid sitt inlopp en storre tvarsektion an kanalerna 15 atminstone vid dessas utlopp. The part 4 is provided with annular surfaces, which together with the inner surfaces of the head 9 form distribution channels 13 and 14 for the gas. From the distribution channel 14, a relatively narrow groove 16 extends food, i.e. towards the axis of the part 4. Gas ducts 15 are arranged in the part 4 and extend from the distribution channel 13 to the groove 16 in the distribution channel 14. Gas ducts 17 are also arranged in the part 4 and extend from the groove 16 to the front of the part 4 at the seat 5. The gas ducts 17 have at least at their inlet a larger cross section of the channels 15 at least at their outlets.

Gaskanalerna 17 och kanalerna 3 Mr den brannbara gasblandningen aro belagna sA, att deras angransande andar fOretradesvis sammanfalla vid satet 5. For att sakerstalla detta sammanfallande kan en tapp 18 vara anordnad ph framsidan av delen 4 f6r att ingripa i ett motsvarande hal i den framre munstycksdelen 2. The gas ducts 17 and the ducts 3 Mr the combustible gas mixture are coated so that their adjacent spirits preferably coincide at the set 5. To ensure this coincidence, a pin 18 may be arranged at the front of the part 4 to engage in a corresponding hall in the front nozzle part. 2.

En gasledning 19 ar anordnad i huvudet 9 och leder fran en (ej visad) kAlla med ett relativt Mgt gastryck till fordelningskanalen 13 for gasen. En gasledning 20 leder vidare frail en ej visad gaskalla med relativt lagt Lryck och Ar forenad med gasfOrdelningskanalen 14 och sparet 16. En ledning 21 for komprimerad gas leder till gasledningen 22. Ledningen 22 slutar med sin yttre ande vid 23 vid framsidan av huvudet 9. Ett gasmunstycke Sr anordnat i ka.pan 24, som Sr fastskruvad pa huvudet 9 medelst gangor 25 och bildar ett rum 26 for blastergasen. A gas line 19 is arranged in the head 9 and leads from a source (not shown) with a relatively high gas pressure to the distribution channel 13 for the gas. A gas line 20 further leads to a gas skull (not shown) with relatively laid Lryck and Ar combined with the gas distribution channel 14 and the spar 16. A line 21 for compressed gas leads to the gas line 22. The line 22 ends with its outer spirit at 23 at the front of the head 9. A gas nozzle Sr arranged in the housing 24, which is screwed to the head 9 by means of passages 25 and forms a space 26 for the blaster gas.

Vid anvandning av metall i form av en stang eller en trait sasom visas i fig. 1, ken en relativt hard styrbussning 27 vara anordnad i mynningsdelen 2. When using metal in the form of a rod or a trait as shown in Fig. 1, a relatively hard guide bushing 27 can be arranged in the mouth part 2.

Vid sprutans anvandning tillf ores en brannbar gas, en forbranningen underhallande gas samt en blastergas till huvudet 9 frau lampliga ej visade tillforselkallor. Vid ett 15- retradesvis anvant arbetssatt tillf ores en forbranningen underhallande gas, exempelvis luft eller syre, vid relativt hOgt tryck till ledningen 19, och en brannbar gas, exempelvis acetylen, propan eller dylikt, -Mores vid relativt lagt tryck till ledningen 20. Den forbranningen underhallande gasen strOmmar genom ledningen 19 in i fordelningskanalen 13 och sedan genom gaskanalerna 15 Over sparet 16 in i gaskanalerna 17, vilkas andar foretradesvis aro belagna i rat linje med gaskanalernas 15 utloppsandar. Brannbar gas — —3 strommar genom ledningen 20 in i fordelningskanalen 14 och fortsatter in i sparet 16, vilket sasom visas ph ritningen foretradesyis -stracker Sig over kanalernas 17 inloppsandar, varvid brannbar gas tillfores till dessa. Den relativt hoga hastigheten hos den gas, som kommer fran gaskanalerna 15 Over sparet 16 till gaskanalerna 17, fororsakar, att brannbar gas strOmmar Iran sparet 16 in i gaskanalerna 17, dar den blandas med den forbranningen underhallande gasen. Blandningen Indian brannbar och forbranningen underhallande gas strommar fran kanalerna 17 genom kanalerna 3 och ut genom munstycket I delen 2, dar forbranningen ager rum. Det vid gasernas forbranning bildade varmet framfor brannarmunstycket i delen 2 smatter traden 1, vilken frammatas i hu-vudsak kontinuerligt in i lagan. Blastergasen, som exempelvis kan vara luft, strommar genom ledningarna 21 och 22 och kommer yid 23 ut fran huyudet 9 in i blasterrummet 26, dar den medelst gasmunstycket 24 riktas mot spetsen av den smalta traden 21 for att pulvrisera och framdriva metallen. During use of the syringe, a combustible gas, a gas entertaining the combustion and a blaster gas are supplied to the head 9 from suitable supply sources not shown. In a 15- retrievably employed mode of operation, a combustion-maintaining gas, for example air or oxygen, is supplied at relatively high pressure to line 19, and a combustible gas, for example acetylene, propane or the like, -Mores at relatively high pressure to line 20. the combustion entertaining gas flows through the line 19 into the distribution duct 13 and then through the gas ducts 15 Over the spar 16 into the gas ducts 17, the spirits of which are preferably coated in a straight line with the outlet spirits of the gas ducts 15. Flammable gas - - 3 flows through the line 20 into the distribution channel 14 and continues into the groove 16, as shown in the drawing foretradesyis -tracker Sig over the inlet sands of the channels 17, whereby flammable gas is supplied to them. The relatively high velocity of the gas coming from the gas passages 15 across the chute 16 to the gas passages 17 causes flammable gas to flow the Iran chute 16 into the gas passages 17, where it is mixed with the gas entertaining the combustion. The Indian combustible mixture and the combustion entertainment gas flow from the ducts 17 through the ducts 3 and out through the nozzle in the part 2, where the combustion takes place. The heat generated during the combustion of the gases in front of the burner nozzle in the part 2 slams the wire 1, which is fed substantially continuously into the layer. The blaster gas, which may be air, for example, flows through the conduits 21 and 22 and exits yid 23 from the skin 9 into the blaster chamber 26, where it is directed by means of the gas nozzle 24 towards the tip of the narrow wire 21 to pulverize and propel the metal.

Under det aft i den ovan beskrivna utforingsformen den forbranningen underhallande gasen antages vara tillford vid Mgt tryck, Itan konstruktionen enligt uppfinningen aven arbeta, dá brannbar gas -Mores vid ett reintivt Mgt tryck och den forbranningen underhallande gasen -Mores vid ett relativt Mgt tryck. I detta fal tillfores emellertid den brannbara gasen genom ledningen 19, varifran den strommar in i fordelningskanalen 13, genom gaskanalerna 15, Over sparet 16 och in i gaskanalerna 17. Den forbranningen underhallande gasen tillfOres harvid vid relativt lagt tryck genom ledningen 20 till fordelningskanalen 14, varifran den passerar in sparet 16 och sedan pa grund av den relativa hastigheten hos den fran kanalerna 15 utkommande gasen strommar in i kanalerna 17, dar den blandas med brannbar gas, vii-ken aven inkommer i kanalerna 17. Blandningen av brannbar och forbranningen underhallande gas strommar fran kanalerna 17 genom kanalerna 3 fOr den brannbara gasblandningen ut ur brannarmunsty&et i delen 2, varvid aterstoden av tillvagagangssattet blir -detsamma som tidigare beskrivits. In the embodiment described above, the combustion-sustaining gas is assumed to be supplied at high pressure, while the structure according to the invention also operates, then combustible gas -mores at a pure high pressure and the combustion-maintaining gas -mores at a relatively high pressure. In this case, however, the combustible gas is supplied through the line 19, from where it flows into the distribution channel 13, through the gas channels 15, Over sparet 16 and into the gas channels 17. The combustion-maintaining gas is supplied at relatively low pressure through the line 20 to the distribution channel 14. from which it passes into the recess 16 and then, due to the relative velocity of the gas emanating from the ducts 15, flows into the ducts 17, where it is mixed with combustible gas, which also enters the ducts 17. The mixture of combustible and combustion entertaining gas flows from the channels 17 through the channels 3 for the combustible gas mixture out of the burner nozzle in the part 2, the remainder of the approach set being the same as previously described.

Om sa onskas, kan material frammatas till smaltzonen i granulerad form, exempelvis i form av pulver. En konstruktion enligt uppfinningen for anyandning av exempelvis ett metallpulver visas i fig. 5. Konstruktionen är densamma, som visas i fig. 1, med undantag av, att i detta fall metallpulverledningen 28 tillkopplats genom fastskruvning vid gangor 11 pa den bakre anden av delen 4, sâ att metallpulver 29 kan mains genom den centrala ledningen i delen 4 och brannarmynningen i delen 2. Anordningens funktion är densamma som i det fall, dá metallen tillfores i form av en trad med undantag av, att det i delta fall endast är nodvandigt att upphetta metallen tills den mjuknar eller delvis smalter. Den gas, som utkommer fran rummet 26 och riktas medelst munstycket 24, behover vidare i detta fall endast framdriva metallen och behover ej nodvandigtvis finfordela densamma, da den sprutas. If desired, materials can be fed to the melting zone in granular form, for example in the form of powder. A construction according to the invention for inhaling, for example, a metal powder is shown in Fig. 5. The construction is the same as shown in Fig. 1, except that in this case the metal powder line 28 is connected by screwing on passages 11 on the rear end of the part 4. , so that metal powder 29 can be mined through the central conduit in part 4 and the burner mouth in part 2. The function of the device is the same as in the case where the metal is supplied in the form of a wire except that in some cases it is only necessary to heat the metal until it softens or partially melts. Furthermore, the gas which emerges from the space 26 and is directed by means of the nozzle 24, in this case only needs to propel the metal and does not necessarily have to atomize it as it is sprayed.

En av de framsta fordelarna hos konstruktionen enligt uppfinningen är ej endast dess vasentligt minskade benagenhet for bakslag hos Fagan, d. v. s. sa att lagan brinner inuti kanalerna, utan aven den rninskade bendgenheten for skadegorelse pa apparaturen som eft resultat av bakslag, om ett dylikt skulle intraff a. Vid tidigare kanda konstruktioner bliva kanalerna vanligen, da ett bakslag intraffar, irreparabelt skadade inom nagra fa sekunder, och i manga fall sonderbrannes sjalva brannarhuvudet. Vid konstruktionen enligt uppfinningen ar fara for bakslag I storsta utstrachning undanrojd. Da bakslag intraffar brinner lagan i kanalerna 17, eftersom den brannbara gasblandningen ej existerar langre mat. Volymen av de vid forbranningen utvecklade gaserna begransar tillstromningen av saval brannbar som forbranningen underhallande gas sa, att en mycket liten laga uppkommer i gaskanalerna 17. Vanligtvis ar denna laga sa liten, att det var.- me den utvecklar forsvinner genom delen 4 och brannarmunstycksdelen 2 samt bortfores genom kylningseffekten hos blasterluf ten I rummet 26, sa att nagon sonderbranning av munstycket eller andra delar ej uppkommer. Vid den i fig. 1 visade konstruktionen är det mOjligt for lagan att sla tillbaka i en enskild kanal, medan de aterstaende kanalerna fortsatta att fungera normalt. Detta ar ibland en fordel, emedan sprutningen kan fortsatta trots den relativa forsamringen genom forlusten av en av kanalerna. Emellertid kan detta aven vara en nackdel, emedan den som skater sprutan ej blir varse, att la.gan slagit tillbaka i en kanal. Man har funnit, att en liten kanal som är anordnad att sammanbinda alla kanalerna for blandningen av brannbar och forbranningen underhallande gas, minskar denna sistnamnda nackdel. One of the main advantages of the construction according to the invention is not only its substantially reduced susceptibility to setback in Fagan, ie so that the layer burns inside the channels, but also the reduced bending unit for damage to the apparatus as a result of setback, should such occur In prior art constructions, the ducts usually, when a setback occurs, become irreparably damaged within a few seconds, and in many cases the actual burner head is burned. In the construction according to the invention, the danger of setbacks is largely eliminated. When setbacks occur, the flame burns in the ducts 17, since the combustible gas mixture no longer exists in food. The volume of the gases evolved during combustion limits the influx of flammable gases as the combustion gas undergoes, so that a very small layer arises in the gas ducts 17. Usually this layer is so small that what it develops disappears through part 4 and the burner nozzle part 2 and is carried away by the cooling effect of the blaster air in the room 26, so that no probe burning of the nozzle or other parts occurs. In the construction shown in Fig. 1, it is possible for the law to strike back in a single channel, while the remaining channels continue to function normally. This is sometimes an advantage, as the spraying can continue despite the relative assembly through the loss of one of the channels. However, this can also be a disadvantage, since the person skating the syringe does not notice that the layer has struck back in a channel. It has been found that a small channel arranged to interconnect all the channels for the mixture of combustible and the combustion gas entertaining reduces this latter disadvantage.

I fig. 6 och 7 betecknar 4' en del i en alternativ utforingsform av uppfinningen. Denna del 4' ar konstruerad pa samma satt som den i fig. 1 visade delen 4 och har gaskanaler 15' och 17' samt en tapp 18'. Ett ringformat spar 30 dr anordnat i satet och sammanbinder kanalerna 17. Detta ringformade spar behOver ej vara och 5.r foretradesvis ej tillrackligt stort for att filldta stromning av flagon stOrre mangd gas. Exempelvis ar det lampligt att giva sparet en betydligt mindre tvarsektion an tvarsektionen av en av kanalerna 17'. Avsikten med detta spar Or ej att majliggora flagon gasstromning under nor-main betingelser utan endast att forena ka- 4— 127O7 — nalerna sa, att om Fagan skulle sla tillbaka i nagon av kanalerna detta omedelbart skulle bliva fallet i alla kanalerna. Vid denna konstruktion, som faretradesvis anvandes for van-hg metallisering, kommer sprutskotaren omedelbart att veta, om ett bakslag intraffar. In Figs. 6 and 7, 4 'denotes a part in an alternative embodiment of the invention. This part 4 'is constructed in the same way as the part 4 shown in Fig. 1 and has gas ducts 15' and 17 'and a pin 18'. An annular groove 30 is arranged in the set and connects the channels 17. This annular groove need not be and is preferably not large enough to fill the flow of flakes with a larger amount of gas. For example, it is appropriate to give the save a much smaller cross section than the cross section of one of the channels 17 '. The purpose of this is not to allow flake gas flow under normal conditions, but only to unite the channels, so that if Fagan were to strike back in any of the channels, this would immediately be the case in all the channels. In this construction, which is dangerously used for ordinary metallization, the sprayer will immediately know if a setback occurs.

En alternativ konstruktion enligt uppfinningen visas i fig. 8, som askadliggor en detalj 4". Denna detalj är konstruerad pa samma salt som den i fig. 1 visade delen 4 och liar gaskanaler 15". I detta fall aro emellertid gaskanalerna 17" konstruerade stone vid sina inloppsandar du vid sina utlopp. I denna konstruktion hava kanalerna 17" en slat och foretradesvis langstrackt konicitet och koniciteten är faretradesvis nagot bajd, sd att lutningen minskar nagot frau inlopps- till utlopp sanden. An alternative construction according to the invention is shown in Fig. 8, which ashes a detail 4 ". This detail is constructed on the same salt as the part 4 shown in Fig. 1 and has gas channels 15". In this case, however, the gas ducts 17 "are constructed of stone at their inlet sands at their outlets. In this construction, the ducts 17" have a smooth and preferably elongated conicity and the conicity is dangerously slightly curved, so that the slope decreases somewhat from the inlet to outlet sand.

En annan alternativ konstruktion enligt uppfinningen visas i fig. 9 dar delen 4" liknar motsvarande del i fig. 1 och 8 med undantag av, att kanalerna 15" aro nagot koniska och att inloppsandarna aro mindre och utloppsandarna stone. Storleken av denna konicitet beror pa det olika trycket mellan kanalernas 15" inlopps- och utloppsandar .och bOr vara avpassad sa, att en maximal hastighet erhalles hos den ur kanalerna 15" utkommande gasen. Gaskanalerna 17" kunna vara koniska, sasom visas och beskrives i samband med den i fig. 8 visade utforingsformen, eller de kunna vara raka sasom visas i utforingsformen i fig. 1. Another alternative construction according to the invention is shown in Fig. 9 where the part 4 "is similar to the corresponding part in Figs. 1 and 8 except that the channels 15" are somewhat conical and that the inlet sands are smaller and the outlet spirits stone. The magnitude of this conicity depends on the different pressure between the inlet and outlet spirits of the channels 15 "and should be adjusted so that a maximum velocity is obtained for the gas coming out of the channels 15". The gas passages 17 "may be conical as shown and described in connection with the embodiment shown in Fig. 8, or they may be straight as shown in the embodiment of Fig. 1.

I varje fall dr det lampligt alum ej nodvandigt all avrunda kanterna nagot vid inloppen till kanalerna 15, 15', 15" och 15 ". In any case, the lamp alum does not necessarily round all the edges slightly at the inlets to the channels 15, 15 ', 15 "and 15".

Uppfinningen ar ej begransad till de pa ritningen visade konstruktionerna utan hOnfOr sig Over huvud taget till sprutor for blastersprutning av i varme smaltande material, faretradesvis metal', vilka sprutor i huvudsak best& av atminstone ett gasrum, minst en forsta gaskanal, forsta medel for tillforande av antingen en brannbar gas eller en forbranningen underhallande gas vid relativt Mgt tryck till denna forsta gaskanal, minst en andra gaskanal dimensionerad och utformad f Or i huvudsak fri, icke virvlande gasstramning till munstyekets utloppsande, vilken gaskanal med sitt inlopp i oppen kommunikation med gasrummet leder fran detta och dr belagen med sitt inlopp i gasstrommens riktning i rat linje med den forsta gaskanalens utlopp, samt andra medel for fritt tillforande av den andra antingen brannbara gasen eller forbranningen underhallande gasen vid relativt lagt tryck till ovannamnda gas-Dar. The invention is not limited to the constructions shown in the drawing, but relates generally to syringes for blasting spraying of hot melting materials, preferably metal, which syringes mainly consist of at least one gas space, at least one first gas duct, first means for supplying either a combustible gas or a combustion entertaining gas at relatively high pressure to this first gas duct, at least a second gas duct dimensioned and designed for substantially free, non-swirling gas flow to the nozzle outlet, which gas duct with its inlet in open communication with the gas space leads from this and dr coated with its inlet in the direction of the gas stream in a straight line with the outlet of the first gas duct, as well as other means for free supply of the second either combustible gas or the combustion entertaining gas at relatively added pressure to the above-mentioned gas-Dar.

Vid anvandning av konstruktionen enligt uppfinningen foredrager man vanligen att anvanda syre sasom den forbranningen underhallande gasen, lampligen vid ett tryck, som är forhallandevis hogre an branslegasens. Eftersom syre kan komprimeras till relativt hogt tryck utan flagon sarskild risk, an det mojligt att i samband med konstruktionen enligt uppfinningen uppratthalla mycket haga utloppshastigheter for syrgasen och. salunda Oven for blandningen av branslegas och syre -vid munstycksspetsen, vilket resulterar i hog-re sprutningshastighet och hogre effektivitet.. When using the construction according to the invention, it is usually preferred to use oxygen as the gas which maintains the combustion, preferably at a pressure which is relatively higher than that of the fuel gas. Since oxygen can be compressed to a relatively high pressure without any particular risk, it is possible in connection with the construction according to the invention to maintain very high outlet velocities for the oxygen gas and. salunda Oven for the mixture of fuel gas and oxygen -at the nozzle tip, which results in higher spraying speed and higher efficiency ..

Sasom ett exempel pa arbetsgangen vid konstruktionen enligt uppfinnigen kan nam-- nas, att syre lampligen tillfores till gashuvudet vid ett overtryck av Zs kg per cm' och att acetylen -Mares vid ett overtryck av 1 kg per cm'. Vid dessa tryck liar man funnit, att en variation i tryckforhallandet mellan syre och acetylen av t. o. m. men an 1/2 kg per cm2 endast fororsakar samma obalanserade forhallande i Fagan som skulle uppkomma vid ett obalanserat avertryck av endast 0,2 kg per cm' vid de tidigare kanda metalliseringssprutorna. As an example of the operation of the construction according to the invention, it can be mentioned that oxygen is suitably supplied to the gas head at an overpressure of Zs kg per cm 'and that acetylene -Mares at an overpressure of 1 kg per cm'. At these pressures it has been found that a variation in the pressure ratio between oxygen and acetylene of up to 1/2 kg per cm2 only causes the same unbalanced ratio in Fagan which would arise at an unbalanced overpressure of only 0.2 kg per cm the previously known metallization sprayers.

Claims

Device: A device for spraying hot-melting material provided with a burner nozzle, characterized in that it contains a gas pressure chamber with relatively low pressure, one or more channels for high-pressure gas, means for supplying either combustible gas, or the combustion entertaining gas at relatively high pressure to said gas channel or channels, one or more combustible gas channels, which are dimensioned and shaped for substantially free, non-swirling gas flow to the nozzle outlet and which lead the frail gas chamber with its inlets in open communication with this and in the direction of the gas flow be in line with the outlet or outlets from the gas channel resp. the ducts for high-pressure gas, as well as means for the free supply of either combustible gas or the combustion entertaining gas to the said gas pipe - at relatively low pressure.

1. Device according to claim 1, characterized in that a plurality of channels for high-pressure gas are distributed around the axis of the gas nozzle, and that a plurality of channels for combustible gas are arranged, which in number correspond to the channels for high-pressure gas.

Device according to claim 1 or 2, characterized by an annular distribution channel, which Or is arranged concentrically in relation to the axis of the gas nozzle, a plurality of channels for pneumatic gas distributed around this axis and each with its outlet end in the distribution channel, a plurality of flammable channels gas, each of which corresponds to a channel for high-pressure gas, in that each combustible gas channel leads from the distribution channel with its inlet in open communication with the same, whereby either combustible gas or the combustion entertaining gas is supplied at relatively applied pressure to the distribution channel.

3. A device according to claim 3, characterized in that the distribution channel extends over the inlets to the combustible gas channels to direct the flow of gas from the distribution channel into the inlets of Iran on all sides.

Device according to claim 3 or 4, characterized in that the distribution channel consists of a groove in at least one of two cooperating, conical surfaces in the nozzle, and that this groove extends over the inlets to the channels for combustible gas to allow the gas flow from the distribution channel. into the inlets frail all sides.

5. A device according to any one of the following patent claims, characterized in that the nozzle contains a front part or tip, which is removably attached to the rear part of the nozzle, and that in this front part Oro arranged one or more channels corresponding to the channel or the ducts get flammable gas and roughly in line with these.

Device according to patent claim 6, characterized in that the inlet resp. the inlets to the channel resp. the channels in the tip of the nozzle are larger On the outlet resp. the outlets from the canal resp. the channels get the 'male-child gas.

Device according to claim 6 or 7, characterized in that the sphere Or is arranged in at least one of the cooperating surfaces of the rear and front part of the nozzle and unites all the duct outlets for the combustible gas and the duct inlets in the front part of the nozzle.

Device according to any one of the preceding patent claims, characterized in that the inlet resp. the inlets to the channel resp. the ducts get the combustible gas aro stone On the outlet resp. the outlets from the canal resp. the channels for high-pressure gas.

9. A device according to any one of the preceding patent claims, characterized in that the inlet to the usual duct receives flammable gas or rather its outlet.

10. A device according to any one of the preceding patent claims, which is claimed in the dam, in which the outlet Iran each channel receives high-pressure gas Or starre On its smallest transverse section.

11. Device according to the preceding patent claims, characterized in that the rear part of the nozzle contains a plurality of gas channels distributed around the axis of the nozzle and with its outlets opening at a first cooperating surface, that means arranged by means of a supply of combustible gas combustible for combustion and combustion entertaining gas to these gas ducts, that the front part or tip of the gas nozzle has a second cooperating surface, which is removably mounted to the first cooperating surface, by a plurality of corresponding gas ducts being provided in the front part of the nozzle, a father each of the first-mentioned gas ducts , and lead frail the cooperating surface of the former part approximately in line with the outlets frail the first-mentioned channels.

12. Device according to patent claim 12, characterized in that the inlets to the channels in the front part are larger than the outlets from the first-mentioned channels. Stockholm 1050. Kungl. Boktr. P. A. Norstedt & S5ner 500089 12 "232 17 22 17 ir .....__ 122, ... di .2qr. 1 F & .3 79 IP --.-- I Jar 7 17 '