SE202493C1

SE202493C1 -

Info

Publication number: SE202493C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: A P C Stennick Prioritet begard frcin den 31 oktober 1955 (Storbritannten) Foreliggande uppfinning avser en anordning f6r reglering av matningen vid slagborrmaskiner, vid vilka borrverktyget samverkar med en kolv eller cylinder, som drives av tryckluft, varvid den kolven upptagande cylindern resp. den i cylindern glidande kolven star i forbindelse med en slid, som genom en mutter fir forbunden med en. vridbar skruvspindel, eller kolven for samma andamal fir forbunden med en vid en styrpelare lagrad kuggstang. Inventor: A P C Stennick Priority requested 31 October 1955 (Great Britain) The present invention relates to a device for regulating the feed in percussion drills, in which the drilling tool cooperates with a piston or cylinder, which is driven by compressed air, the piston receiving the cylinder resp. the piston sliding in the cylinder is connected to a slide which is connected to a nut by a nut. rotatable screw spindle, or the piston for the same purpose connected to a rack mounted on a steering column.

Andamalet med uppfinningen fir att astadkomma en sadan anordning, vid vilken man knjuter de fordelar som utmarka borrmaskiner, vid vilka frammatningskraften ph borrverktyget lamnas av en kolv-cylinderanordning, namligen jfimnhet och reglerbarhet hos kraften, men samtidigt kan inskranka ph det vid anvandning av ett tryckmedel (tryck-vatska eller tryckgas) eljest uppkommande utrymmesbehovet. The object of the invention is to provide such a device, in which one attaches the advantages which mark drilling machines, in which the feed force ph the drilling tool is left by a piston-cylinder device, namely smoothness and controllability of the force, but at the same time can restrict it when using a pressure medium (pressurized liquid or pressurized gas) otherwise the need for space arises.

Enligt uppfinningen fir den skruvspindeln vridande resp. kuggstangen forskjutande motorn tryckluftsdriven, Or i den till motorn anslutna tryckluftsledningen en ventil anordnad och Or ett i borrverktygets matningsrorelse medfoljande anslag anordnat, som oppnar ventilen i tryckluftsledningen, nar kolven resp. cylindern narmar sig sitt langst utskjutna lage. According to the invention, the screw spindle for rotating resp. the rack displacing the motor compressed air driven, Or in the compressed air line connected to the motor a valve arranged and Or a stop provided in the feed tool of the drilling tool, which opens the valve in the compressed air line, when the piston resp. the cylinder approaches its longest protruding layer.

Vid denna anordning kan man utfOra cylindern och kolven med forhallandevis mycket kort slaglangd (storleksordningen nagra centimeter), eftersom man genom anordningen enligt uppfinningen astadkommer en fram matning av kolven eller cylindern for varje slag hos de sistnamn.da. In this device the cylinder and the piston can be made with a relatively very short stroke (of the order of a few centimeters), since the device according to the invention provides a feed of the piston or cylinder for each stroke of the latter.

Ett par utforingsexempel pa uppfinningen skola nedan narmare beskrivas med hanvisning till bifogade ritning, p0 vilken fig. 1 i schematisk vy visar en utforingsform och fig. 2 samm.a utforingsforiri vid vertikalborrning. Fig. 3 och 4 visa en annan utfOringsform och fig. en tredje. Fig. 6 visar en detalj av anordningen i fig. 3 och 4. A couple of exemplary embodiments of the invention will be described in more detail below with reference to the accompanying drawing, in which Fig. 1 shows in schematic view an embodiment and Fig. 2 the same embodiment for vertical drilling. Figs. 3 and 4 show another embodiment and Figs. A third. Fig. 6 shows a detail of the device in Figs. 3 and 4.

Maskinen i fig. 1 Or forsedd med en. borrpelare 1, i vilken en skruv 2 Or lagrad och kan drivas av en motor 3. Pa pelaren 1 Or anordnad en slade 4 Died en mutter 5, som genomgas av skruven 2. Sladen 4 kan glida langs pelaren 1 och Or forenad med en cylinder 6 med en holy 7, vars kolvstang 8 uppbar en slaganordning (hammare) 9 eller liknande, vid vilken bergborren 10 for borrning i berget 11 är fast. Kolven 7 drives medelst tryckluft frau en ledning 12. The machine in Fig. 1 Or provided with a. drill column 1, in which a screw 2 Or is mounted and can be driven by a motor 3. On the column 1 Or arranged a slide 4 Died a nut 5, which is threaded through the screw 2. The slide 4 can slide along the column 1 and Or combined with a cylinder 6 with a holy 7, whose piston rod 8 carried a percussion device (hammer) 9 or the like, to which the rock drill 10 for drilling in the rock 11 is fixed. The piston 7 is driven by means of compressed air from a line 12.

Ph. cylindern 6 Or anbragt en annan cylinder 13, i vilken en ventil 14 Or anordnad, som belastas av en fjOder 15 inlagd i en kammare 16, i vilken en tryckluftledning 17 mynnar. Ventilen 14 Or forsedd med en. spindel 18, som skjuter ut ur cylindern 13 och samverkar med ett tvarstycke 19 ph en stang 20, som skjuter ut ur cylindern 6 och Or forenad med kolven 7. Nar genom verkan av slaganordningen 9 borren 10 tranger in i berget, forflyttar sig kolven 7 framat i cylindern 6, tills tvarstycket 19 gar emot ventilspindeln 18 och lattar ventilen 14 frau dess sate, sa att luften fran ledningen 17 genom en ledning 21 kan tillforas 2 motorn 3, varigenom denna satter skruven 2 rotation, sa att cylinder. 6 och darmed cylindern 13 forflyttas framat och kolven 7 ater. lager det i fig. 1 visade laget. Genom den avbrutna kontakten mellan spindeln 18 och tvarstycket 19 atergar ventilen 14 genom inverkan av sin fjader 15 till stangningslaget och motorn 3 stannar och satter icke igang Mudn det beskrivna forloppet upprepas. Ph. the cylinder 6 Or arranged another cylinder 13, in which a valve 14 Or is arranged, which is loaded by a spring 15 inserted in a chamber 16, in which a compressed air line 17 opens. Valve 14 Or equipped with a. spindle 18, which projects out of the cylinder 13 and cooperates with a crosspiece 19 ph a rod 20, which projects out of the cylinder 6 and Or joined to the piston 7. When by the action of the percussion device 9 the drill 10 penetrates into the rock, the piston 7 moves forward in the cylinder 6, until the crosspiece 19 abuts the valve stem 18 and releases the valve 14 from its seat, so that the air from the line 17 through a line 21 can be supplied to the motor 3, whereby it sets the screw 2 so that the cylinder rotates. 6 and thus the cylinder 13 is moved forward and the piston 7 again. layer the layer shown in Fig. 1. Due to the interrupted contact between the spindle 18 and the crosspiece 19, the valve 14 returns to the closing stroke by the action of its spring 15 and the motor 3 does not stop and start. Mudn the described process is repeated.

Genom anvandning av en. ventil 11, 18, som 5ppnar successivt, kan motorns 3 varvtal sâ regleras, att den matar fram cylindern 6 exakt lika fort som borren intranger i berget. By using a. valve 11, 18, which opens successively, the speed of the motor 3 can be regulated so that it feeds the cylinder 6 exactly as fast as the drill penetrates the rock.

Fig. 2 visar vertikalborrning med anordningen i fig. 1, varvid den joke visade borren uppbares av en slaganordning 23, vilken sist- namnda infores i borrhalet omedelbart bakom verktyget och alltid befinner sig i narheten av borrhalets botten. Med 24 betecknas den mo- tor, som driver slaganordningen och verktyget runt via en. ihalig borrstang 25, samnaansatt av ror, som successivt tillskarvas i den man borren tranger djupare och inbordes fOrenade av muffar 26. Fig. 2 shows vertical drilling with the device in Fig. 1, the joke shown drill being supported by a percussion device 23, the latter being inserted into the drill tail immediately behind the tool and always located near the bottom of the drill tail. 24 denotes the motor which drives the percussion device and the tool around via one. ihalig drill rod 25, composed of tubes, which are successively spliced into the one the drill penetrates deeper and are boarded in unbound by sleeves 26.

Lufttillforseln till cylindern 6 sker genom en ledning 123- mot undersidan av kolven 7 och regleras pa sadant satt, att den kraft som uttivas pa kolven motsvarar vikten av borrstangerna minskad med den kraft som onskas utovad pa verktyget. Efter varje tillskarvning av ror maste lufttrycket mot kolven Ras for att kompensera for den Rade vikten. Funktionen ar densamma som beskrivits samband med fig. 1, i del att ventilen 14 Oppnas vid slutet av kolvens 7 slag genom aft tvarstycket 19 gar emot spindeln 18, sa att motorn. 3 och skruven 2 sattas igang och cylinder. 6 flyttas neat, varigenom ventilen 14 stanges och motorn 3 stoppas, tills forloppet skall upprepas. The air supply to the cylinder 6 takes place through a line 123- towards the underside of the piston 7 and is regulated in such a way that the force exerted on the piston corresponds to the weight of the drill rods reduced by the force desired to be exerted on the tool. After each addition of the rudder, the air pressure against the piston Ras must compensate for the Rade weight. The function is the same as described in connection with Fig. 1, in that the valve 14 is opened at the end of the stroke of the piston 7 by the transverse piece 19 going against the spindle 18, so that the motor. 3 and screw 2 is started and cylinder. 6, the net 14 is moved, whereby the valve 14 is closed and the motor 3 is stopped until the process is to be repeated.

Fig. 3 och 4 visa en borrmaskin for vertikaleller horisontalborrning, varvid manoverkolven ar dubbelverkande och kan fora fram och draga undan borren. Figs. 3 and 4 show a drilling machine for vertical or horizontal drilling, in which the maneuvering piston is double-acting and can advance and pull away the drill.

Pa en pelare 31 dr en slade 32 med ett glidstycke 32' anordnad, och pa. sladen är mellan linjaler 33 glidbart anordnat ett block 34 upp- barande en motor 35, som driver borrstangen 36 runt. Ph blocket 34 är en cylinder 37 fast, i vilken en kolv 38 är anordnad, som medelst en kolvstang 39 är forenad med en tvarbalk 40, utgorande del av sladen 82. En omkastare 41 medger tillforsel av tryclduft frail en led-fling 42 till den ena eller andra sidan av kolven -via kanaler 71, 72. Omkastaren visas storre skala i fig. 6 och bestar av ett hus 73 forenat med cylindern 37, i vilket kanalerna 71 och 72 dro anordnade. I en borrning i huset 73 är en krankik 71 anordnad, forsedd med en central borrning 421 i fOrbindelse med ledningen 42 och en ledning 75 till ytterluften. I kiken dr vidare en oppning 76 anordnad, som kan satta ledningen 42 i forbindelse med antingen kanalen 71 eller 72. Alltefter kikens 74 stallning fores luften fra'n ledningen 42 till cylinderkammaren 51 via oppningen 423- och 76 samt kanalen 72 och avgar via kanalen 71 och ledningen 75 eller till cylinderkammaren 50 genom borrningen 423, oppningen 76 och kanalen 71 och avgar via kanalen 72 och ledningen 75. Cylinder. 37 uppbar tvarstycket 19, som samverkar med spindeln 18 pa ventilen 14, vilken är anordnad i cylindern 13 pa sladen 32. Delarna 15, 17 och 21 aro desamma som i fig. 1 och 2. Frammatningen av sladen 32 astadkommes av en kuggstang 45 i ingrepp med ett kuggdrev 46 pa en motor 47. On a pillar 31 there is a slide 32 with a slider 32 'arranged, and on. the blade is slidably arranged between rulers 33, a block 34 carrying a motor 35, which drives the drill rod 36 around. Ph block 34 is a cylinder 37 fixed, in which a piston 38 is arranged, which by means of a piston rod 39 is connected to a crossbeam 40, forming part of the sled 82. A switch 41 allows the supply of pressure fragrance from a hinge flap 42 to the one or the other side of the piston - via channels 71, 72. The inverter is shown on a larger scale in Fig. 6 and consists of a housing 73 connected to the cylinder 37, in which the channels 71 and 72 are arranged. In a bore in the housing 73 a crank 71 is provided, provided with a central bore 421 in connection with the conduit 42 and a conduit 75 to the outside air. An opening 76 is further provided in the bin, which can connect the line 42 to either the duct 71 or 72. According to the position of the bin 74, the air is conveyed from the duct 42 to the cylinder chamber 51 via the openings 423 and 76 and the duct 72 and exits via the duct 71 and the conduit 75 or to the cylinder chamber 50 through the bore 423, the opening 76 and the channel 71 and exits via the channel 72 and the conduit 75. Cylinder. 37 supports the crosspiece 19, which cooperates with the spindle 18 on the valve 14, which is arranged in the cylinder 13 on the slide 32. The parts 15, 17 and 21 are the same as in Figs. 1 and 2. The feeding of the slide 32 is effected by a rack 45 in engagement with a gear 46 on a motor 47.

Funktionen är den foljande: Tryckluft frail ledningen 42 infores i cylinderkammaren 50 och pressar motoraggregatet 34, 35 mot verktyget samtidigt som den astadkommer forskjutning av cylindern 37. Pa grund av den sistnamndas forflyttning gar tvarstycket 19 mot ventilspindeln 18 och oppnar ventilen 14, och tryckluften genom ledningen 21 salter motorn 47 i rotation, sá att denna i sin tur driver sladen 32 framat och darmed Liven cylinder. 13 och kolven 38. Pa grund av denna forflyttning bringas ventilen 14 att stanga, varigenom motorn 47 stoppas. Samtidigt har kolven 38 atertagit silt forra lage i cylinder.. Den jamna frammatningen av borrstangen utloser en ny framflyttning av sladen 32 for varje gang som tvarstycket 19 oppnar ventilen 14. The function is as follows: Compressed air from the line 42 is introduced into the cylinder chamber 50 and presses the motor assembly 34, 35 against the tool while displacing the cylinder 37. Due to the latter movement, the crosspiece 19 moves towards the valve stem 18 and opens the valve 14, and the compressed air through the line 21 salts the motor 47 in rotation, so that it in turn drives the blade 32 forward and thus the Liven cylinder. 13 and the piston 38. Due to this movement, the valve 14 is caused to close, whereby the engine 47 is stopped. At the same time, the piston 38 has returned the silt to the previous bearing in the cylinder.

Vid vertikal harming skall ingen kraft utovas i borrningsriktningen utan i stallet i motsatt riktning fOr att borrstangernas vikt skall utbalanseras. For detta andamal stalles omkastaren 41 sa, att tryckluft inslappes i cylinderns 37 kammare 51. Ef tersom totalvikten av borrstangerna och vridmotorn Kr storre an den av kolven ut5vade kraften, gar cylindern 37 neat och astadkommer darigenom att ventilen oppnas, sá att frammatning sker. In the case of vertical harming, no force shall be exerted in the drilling direction but in the stable in the opposite direction in order for the weight of the drill rods to be balanced. For this purpose, the diverter 41 is positioned so that compressed air is let into the chamber 51 of the cylinder 37. Since the total weight of the drill rods and the rotary motor Kr is greater than the force exerted by the piston, the cylinder 37 does not move and causes the valve to open.

Fig. 5 askadliggor en utforingsform, vid vilken kraftkolven 60 Sr forenad med en kuggslang 62, glidbart lagrad i en. borrpelare 63. Kuggstangen uppbhr yid ena nden tvarstycket 19, som samverkar med en ventilanordning 13-17 fast vid pelaren 63. Motorn 64, som driver borrstangen 65 runt, och motorn 66 for frammatningen aro anbragta pa en slade 67, som glider langs pelaren 63. Motorns 66 axel 69' ar forsedd med ett kuggdrev 69 i ingrepp med kuggstangen 62. Nar motor. 66 star sill-in Sr sladen 67 fast farenad med kuggstangen 62 genom drevet 69. Av denna orsak pressas det vid borrspindeln 65 fasta borrverktyget 3 mot berget av kolven 60, mot vilken tryckluft, som inslappes i cylinderkammaren 68, verkar. Nfir barren intranger i berget oppnar kuggstfingen 62, som medbringar sladen 67, ventilen 14 genom att tvarstycket 19 gar emot ventilspindeln 18 och tryckluf ten, som nu strommar genom den bojliga ledningen 21, driver motorn 66, som via kuggdrevet 69 for tillbaka kuggstangen 62 och aterstaller kolven 60 i dess utgangslage, varvid ventilen 14 stanger och motorn stannar for att Ater satta igang vid nasta arbetscykel. Graden av ventilens oppning reglerar langden av frammatningen, som salunda kan anpassas till borrhastigheten under bibehallande av en bestamd kraft, som utovas av tryckluften mot kolven 60. Fig. 5 shows an embodiment in which the power piston 60 Sr is connected to a gear hose 62, slidably mounted in a. drill column 63. The rack rests on one end of the crosspiece 19, which cooperates with a valve device 13-17 fixed to the column 63. The motor 64, which drives the drill rod 65 around, and the motor 66 for the feed are mounted on a slide 67, which slides along the column 63. The shaft 69 'of the motor 66 is provided with a gear 69 in engagement with the rack 62. When the motor. 66 the herring 67 is fixedly fastened with the rack 62 through the gear 69. For this reason the drilling tool 3 fixed to the drill spindle 65 is pressed against the rock by the piston 60, against which compressed air, which is let into the cylinder chamber 68, acts. Before the bar penetrates the rock, the rack 62, which carries the sledge 67, opens the valve 14 by the crosspiece 19 abutting the valve stem 18 and the compressed air, which now flows through the flexible conduit 21, drives the motor 66, which via the gear 69 returns the rack 62 and restores the piston 60 in its initial position, the valve 14 closing and the engine stopping to start again at the next duty cycle. The degree of opening of the valve regulates the length of the feed, which can thus be adapted to the drilling speed while maintaining a certain force exerted by the compressed air against the piston 60.

Claims

Patent claim:

Device for regulating the feed in percussion drilling machines, in which the drilling tool cooperates with a piston or cylinder, which is driven by compressed air, wherein the cylinder receiving the piston resp. the piston slid in the cylinder is connected to a slide which is connected by a nut to a rotatable screw spindle, or the piston for the same purpose is connected to a toothed pin mounted on a guide column, characterized in that the screw spindle (2) rotates or the toothed pin (45; 62) displacing motor (3; 47; 66) for the pneumatic drive, that a valve (14) is arranged in the compressed air line (21) connected to the motor and that a stop (19) provided in the feed movement of the drilling tool is arranged, which opens the valve (14) in the compressed air line (21), when the piston (7; 38; 60) resp. the cylinder nfirmar silt lfingst postponed 'age.

2. Device according to claim 1, in particular for drilling local boreholes, in which the drilling tool is arranged on an immediate core therethrough in the borehole with the accompanying hammer and the hammer is arranged by means of a motor by rotating hollow stem elements which can be connected successively in the sinking direction. that one part of the piston-cylinder device, e.g. the cylinder, ax in the direction of feed of the tool fixedly connected to the housing (13) of the valve (14) and the other part of the unit, e.g. the piston, with the rotary motor (24) for the hammer (Fig. 2).

Device according to claim 1 or 2, characterized in that on a guide column (31) a slide (32) is displaceably mounted, which carried a reciprocally displaceable motor (34, 35), at which the cylinder (37) of the piston-cylinder device, is fixed, in which a piston (38) connected to the slide (32) is controlled and which cylinder carried a stop (19) for the action of the compressed air valve. (13, 14) resp. starting the feed motor (fig. 3).

Device according to patent claims 1 and 2, characterized in that the feed providing resp. the piston (60) partially receiving the drilling pressure is fixedly mounted on a toothed rod (62) supported on the guide column (63) at its free end and the rotary motor (64) of the drill rod (65) is fixed to one on the guide column. (63) slidably arranged sledge (67), which in addition terminates a feed motor (66) producing a denim displacement movement, the slat (67) and the rack (62) being rigidly interconnected in the case of a stationary feed motor (66) and the drill tool being pressed against the workpiece under pressure.

Device according to patent claim 3, characterized in that it is provided with a non-return valve (41), which allows supply of compressed air to one or the other side of the piston. (38), as the drilling song. (36) (yid horizontal drilling) shall be pressed against the tool or (in case of vertical firing) during compensation of the weight shall be pressed against the feeding device (fig. 3). Request publications: Pateniskrifter frein Great Britain 418 733.