SE432460B - Shank adapter for rock-drilling machine - Google Patents

Shank adapter for rock-drilling machine

Info

Publication number
SE432460B
SE432460B SE7909103A SE7909103A SE432460B SE 432460 B SE432460 B SE 432460B SE 7909103 A SE7909103 A SE 7909103A SE 7909103 A SE7909103 A SE 7909103A SE 432460 B SE432460 B SE 432460B
Authority
SE
Sweden
Prior art keywords
adapter
hole
axial
drilling machine
flushing hole
Prior art date
Application number
SE7909103A
Other languages
Swedish (sv)
Other versions
SE7909103L (en
Inventor
G C Gustafsson
Original Assignee
Fagersta Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fagersta Ab filed Critical Fagersta Ab
Priority to SE7909103A priority Critical patent/SE432460B/en
Priority to NO802118A priority patent/NO152618C/en
Priority to CA000362899A priority patent/CA1160214A/en
Publication of SE7909103L publication Critical patent/SE7909103L/en
Publication of SE432460B publication Critical patent/SE432460B/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/03Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Closures For Containers (AREA)

Abstract

Shank adapter for rock-drilling machine provided with at least one lateral flushing hole 5 whose axis lies substantially in the same plane as the axis of the adapter and which connects the axial flushing hole 6 of the adapter with its outside and which, together with the axial flushing hole 6, is intended as a transport channel for flushing medium. The lateral flushing hole 5 has an oblong cross-sectional shape in the axial direction of the adapter and extends preferably at right angles to the axial flushing hole 6. <IMAGE>

Description

ï9üëíïf-šaä bilden vid sidcspolhål med cirkulär tvärsektion. De tangentiella tryckspänningarna ger nämligen ett tillskott till de i drift unn- kommande, axiella dragspänningarna i spolhålskanten på håldiame- tern vinkelrätt mot adapterns axialriktning. Visserligen mot- verkar de axiella tryckspänningarna från uppkolníngen till en början de negativa effekterna från de tangentiella tryckspän- ningarna men genom omlagringsfenomen i den uppkolade ytzonen på grund av de slagpåkänningar som förekommer i drift visar det sig att de axiella tryckspänningarna snabbt reduceras, varför den ovannämnda positiva effekten blir försumbar. ï9üëíïf-šaä the image at side coil holes with circular cross section. The tangential the compressive stresses provide an addition to the future axial tensile stresses in the bobbin hole edge on the hole diameter tern perpendicular to the axial direction of the adapter. Admittedly, acts the axial compressive stresses from the carbonization to a initially the negative effects of the tangential compressive stresses but through rearrangement phenomena in the carbonized surface zone of due to the impact stresses that occur in operation, it turns out that the axial compressive stresses are rapidly reduced, so it the above positive effect becomes negligible.

I det fall då de cirkulära sidospolhålen är borrade i sned vinkel mot adapterns axel erhålles en viss reduktion av påkän- ningarna i de båda områden på spolhålets kan som ligger i det diametrala planet genom spolhålet vinkelrätt mot adapterns axel genom att konturen hos sidospolhålets kant får eliptisk formf Eftersom sidospolhålet emellertid har cirkulär tvärsektion krä- ves det fler än ett hål, nämligen vanligtvis två, eftersom dia- metern hos det cirkulära sidospolhâlet inte kan göras alltför stor men spolhålens tvärsnittsarea ändå måste motsvara i huvud- sak arean hos adapterns axiella spolhål.In the case where the circular side coil holes are drilled at an angle angle to the axis of the adapter, a certain reduction in stress is obtained. the ions in the two areas of the coil hole can be located in it diametrical plane through the coil hole perpendicular to the axis of the adapter by the contour of the edge of the side coil hole acquiring an elliptical shape However, since the side coil hole has a circular cross-section required there is more than one hole, namely usually two, since the the meter of the circular side coil hole can not be made too large but the cross-sectional area of the flush holes must still correspond in the main the area of the adapter's axial flush hole.

Uppfinningen har till ändamål att åstadkomma en nackadapter som är försedd med ett enda sidospolhål, vilket har sådan tvär- sektionsform att spänningskoncentrationerna vid den yttre sido- spolhålskanten reduceras samtidigt som antalet för brottstart känsliga hålkanter minskar med hälften, vilket också leder till att sannolikheten för utmattningssprickor orsakade därstädes av den roterande böjpåkänningen på adaptern reduceras.The object of the invention is to provide a neck adapter provided with a single side-coil hole, which has such a transverse section form that the stress concentrations at the outer side the flush hole edge is reduced at the same time as the number for break start sensitive hole edges decrease by half, which also leads to that the probability of fatigue cracks caused there by the rotary bending stress on the adapter is reduced.

Det nya och kännetecknande hos adaptern enligt uppfinningen framgår av patentkraven.The novelty and characteristics of the adapter according to the invention appears from the claims.

Tack vare att tvärsektionsarean hos spolhålet i adaptern enligt uppfinningen kan göras större genom att hålets tvärsek- tion är avlång parallellt med adapterns axiella riktning kräves det inte längre fler än ett enda sidospolhål eftersom tvärsek- tionsarean hos detta kan göras lika stor som tvärsektionsarean hos adapterns axiella spolhål. Genom att sidospolhålet nu lig- ger på endast en sida av adaptern minskar riskerna av att hålet befinner sig i zonen med den största påkänningen med hänsyn till den roterande böjutmattningen vid drift.Thanks to the cross-sectional area of the coil hole in the adapter according to the invention can be made larger by the cross-section of the hole tion is elongated parallel to the axial direction of the adapter required no longer more than a single side-coil hole because the cross-sectional the area of this can be made as large as the cross-sectional area at the axial coil holes of the adapter. Because the side coil hole is now provides on only one side of the adapter reduces the risk of the hole is in the zone of greatest stress with respect to the rotary bending fatigue during operation.

Uppfinningen beskrives i detalj i det följande under hän- 7909103-9 visning till bifogade ritning, på vilken fig. l är en sidovy av en utföringsform av en nackadapter enligt uppfinningen och fig. 2 visar en skärning genom spolhålet i adaptern enligt fig. l.The invention is described in detail in the following with reference to 7909103-9 view to the accompanying drawing, in which Fig. 1 is a side view of an embodiment of a neck adapter according to the invention and fig. Fig. 2 shows a cut through the coil hole in the adapter according to Fig. 1.

Den på ritningen visade adaptern har en slagyta l för borrmaskinens slagkolv, bommar 2 för vridning av adaptern under borrning och en yttre gänga 3 för påskruvning av en skarvhylsa.The adapter shown in the drawing has a striking surface l for the drill's percussion piston, bar 2 for turning the adapter below bore and an outer thread 3 for screwing on a splice sleeve.

Sektionsvyn i fig. 2 visar en sektion genom ett spolhuvud 4.The sectional view in Fig. 2 shows a section through a coil head 4.

Spolhuvudet är inte visat i fig. l. Spolhuvudet omsluter adap- terns avlånga sidospolhål 5 som mynnar i det axiella spolhålet 6. Spolhuvudet H har en inloppsanslutning 7 på vilken kan kopp- las exempelvis en slang för tillförsel av spolvatten. Spolhuvu- det 4 är monterat glidbart på adaptern via tätningsringar 8.The coil head is not shown in Fig. 1. The coil head encloses the adapter. the elongate side spool hole 5 which opens into the axial spool hole 6. The flushing head H has an inlet connection 7 on which the coupling read, for example, a hose for supplying rinsing water. Spolhuvu- it 4 is slidably mounted on the adapter via sealing rings 8.

Sidospolhålet 5 förlöper vinkelrätt mot det axiella spolhålet 6 och det åstadkommes med hjälp av t.ex. en pinnfräs, vilket inne- bär att dess båda ändar 9 har formen av halvcylindrar medan dess sidor 10 förlöper parallellt med adapterns axelriktning.The side coil hole 5 extends perpendicular to the axial coil hole 6 and it is achieved by means of e.g. a end mill, which means carries that its two ends 9 are in the form of half-cylinders while its sides 10 run parallel to the axis direction of the adapter.

I det föregående har beskrivits en speciell utföringsform av naokadaptern enligt uppfinningen men uppfinningen är inte be- gränsad till denna speciella utföringsform utan omfattar alla de utföringsformer som kan tänkas falla inom ramen för patentkraven.In the foregoing, a special embodiment has been described of the naokad adapter according to the invention but the invention is not limited to this particular embodiment but includes all of them embodiments that may fall within the scope of the claims.

Claims (2)

79Û9W3°9 “l Patentkrav l. Nackadapter för bergborrmaskin försedd med åtminstone ett sidospolhål (5) vars axel företrädesvis ligger i samma plan som adapterns axel och som förbinder adapterns axiella spolhål (6) med dess utsida och som tillsammans med det axiella spolhå- let är avsett som transportkanal för spolmedium, k ä n n e - t e c k n a d av att sidospolhålet (5) har avlâng tvärsektions- form i adapterns axiella led. 779Û9W3 ° 9 „l Patent claim l. Neck adapter for rock drilling machine provided with at least one side coil hole (5) whose axis preferably lies in the same plane as the axis of the adapter and which connects the axial coil hole (6) of the adapter to its outside and which together with the axial coil hole is intended as a transport channel for flushing medium, characterized in that the side flushing hole (5) has an elongated cross-sectional shape in the axial joint of the adapter. 7 2. Nackadapter enligt krav l, k ä n n e t e c k n a d av att sidospolhålet (5) sträcker sig företrädesvis vinkelrätt .mot det axiella spolhålet (6).2. A neck adapter according to claim 1, characterized in that the side coil hole (5) extends preferably perpendicular to the axial coil hole (6).
SE7909103A 1979-11-02 1979-11-02 Shank adapter for rock-drilling machine SE432460B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE7909103A SE432460B (en) 1979-11-02 1979-11-02 Shank adapter for rock-drilling machine
NO802118A NO152618C (en) 1979-11-02 1980-07-14 NECK ADAPTER FOR MOUNTAIN DRILLING MACHINE.
CA000362899A CA1160214A (en) 1979-11-02 1980-10-21 Shank adaptor for rock-drilling machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7909103A SE432460B (en) 1979-11-02 1979-11-02 Shank adapter for rock-drilling machine

Publications (2)

Publication Number Publication Date
SE7909103L SE7909103L (en) 1981-05-03
SE432460B true SE432460B (en) 1984-04-02

Family

ID=20339237

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7909103A SE432460B (en) 1979-11-02 1979-11-02 Shank adapter for rock-drilling machine

Country Status (3)

Country Link
CA (1) CA1160214A (en)
NO (1) NO152618C (en)
SE (1) SE432460B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004029400A1 (en) * 2002-09-27 2004-04-08 Atlas Copco Rock Drills Ab Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string
WO2008133584A1 (en) * 2007-04-25 2008-11-06 Atlas Copco Secoroc Ab Neck adapter with side- flushing hole

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2944756B1 (en) * 2014-05-13 2017-04-05 Sandvik Intellectual Property AB Shank adapter with reinforced flushing slot

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004029400A1 (en) * 2002-09-27 2004-04-08 Atlas Copco Rock Drills Ab Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string
WO2008133584A1 (en) * 2007-04-25 2008-11-06 Atlas Copco Secoroc Ab Neck adapter with side- flushing hole

Also Published As

Publication number Publication date
NO152618C (en) 1985-10-23
NO152618B (en) 1985-07-15
CA1160214A (en) 1984-01-10
SE7909103L (en) 1981-05-03
NO802118L (en) 1981-05-04

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