NO152618B - NECK ADAPTER FOR MOUNTAIN DRILLING MACHINE. - Google Patents
NECK ADAPTER FOR MOUNTAIN DRILLING MACHINE. Download PDFInfo
- Publication number
- NO152618B NO152618B NO802118A NO802118A NO152618B NO 152618 B NO152618 B NO 152618B NO 802118 A NO802118 A NO 802118A NO 802118 A NO802118 A NO 802118A NO 152618 B NO152618 B NO 152618B
- Authority
- NO
- Norway
- Prior art keywords
- adapter
- hole
- flushing
- axial
- drilling machine
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 37
- 239000011435 rock Substances 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/03—Couplings; 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)
Description
Foreliggende oppfinnelse vedrører en halsadapter for bergboremaskin forsynt med i det minste et sidespylehull, hvis akse fortrinnsvis ligger i samme plan som adapterens akse og som forbinder adapterens aksielle spylehull med adapterens utside og som sammen med det aksielle spylehullet er beregnet som transportkanal for spylemedium. The present invention relates to a neck adapter for a rock drilling machine provided with at least one side flushing hole, the axis of which preferably lies in the same plane as the adapter's axis and which connects the adapter's axial flushing hole with the outside of the adapter and which, together with the axial flushing hole, is intended as a transport channel for flushing medium.
Nå anvendes i stadig større utstrekning hydrauliske drevne maskiner ved bergbor. Disse maskiner utvikler store krefter som medfører at borsynkningen blir høy, hvilket samtidig krever, en effektiv borttransport av boreslammet, dvs. en effektiv spyling. For å oppnå dette må trykket hos spylemediet, vanligvis vann eller luft, holdes meget høyt. For å beherske tetningsproblemet ved innmatningsstedet for spylemediet i halsadapteren har man et spylehode rundt adapteren inn i hvilket man leder spylemediet og videre fra dette inn i adapterens aksielle spylehull gjennom to stykker sirkulære sidespylehull som kan være boret vinkelrett mot adapterens aksiale retning eller boret i skrå vinkel mot denne. Denne type av spyling med spesielt spylehode rundt adapteren kalles separatspyling. Hydraulically driven machines are now increasingly being used in rock drilling. These machines develop large forces which result in the drilling sinking being high, which at the same time requires an efficient removal of the drilling mud, i.e. an effective flushing. To achieve this, the pressure of the flushing medium, usually water or air, must be kept very high. In order to overcome the sealing problem at the point of entry for the flushing medium in the neck adapter, a flushing head is fitted around the adapter into which the flushing medium is directed and further from this into the adapter's axial flushing hole through two pieces of circular side flushing holes which can be drilled perpendicular to the adapter's axial direction or drilled at an oblique angle against this one. This type of flushing with a special flushing head around the adapter is called separate flushing.
De nevnte sidespylehull har imidlertid den ulempe at de vil virke som store bruddanvisninger ved at påkjenningene blir spesielt høye i de to områder på sidespylehullets kant som ligger i et diametralt plan gjennom sidespylehullet vinkelrett mot adapterens akse. Brudd på adapteren oppstår derfor ofte forårsaket av utmatningssprekker som utgår fra nevnte to områder på sidespylehullkanten. Den største årsaken til utmatningssprekkene er at adapteren ved drift er utsatt for roterende bøyepåkjenning som overlagres på de fra støtbølgene kommende påkjenninger. However, the mentioned side flush holes have the disadvantage that they will act as large fracture indications in that the stresses become particularly high in the two areas on the edge of the side flush hole which lie in a diametrical plane through the side flush hole perpendicular to the axis of the adapter. Breakage of the adapter is therefore often caused by discharge cracks that emanate from the aforementioned two areas on the edge of the side flush hole. The biggest cause of the yield cracks is that during operation the adapter is exposed to rotating bending stresses which are superimposed on the stresses coming from the shock waves.
For å øke slitstyrken og utmatningsholdfastheten hos adapteren i sin helhet bruker man å varmebehandle denne ved oppkarbo-nisering. Ved denne forholdsregel oppnås trykkspenninger i adapterens overflatelag i såvel aksiell som tangensiell retning som er tenkt å motvirke de trekkspenninger som oppstår under, drift. Det har imidlertid vist seg at denne opp-karbonisering negativt påvirker spenningsbildet ved sidespylehull med sirkulært tverrsnitt. De tangensielle trykkspenningene gir nemlig et tilskudd til de i drift oppstående, ak-i. sielle trekkspénningene i spylehullkanten på hulldiameteren vinkelrett mot adapterens aksial retning. Riktignok motvir-ker de aksielle trykkspenningene fra oppkarboniseringen til en begynnelse de negative virkningene fra de tangensielle trykkspenningene, men ved omlagringsfenomenet i den oppkar-boniserte yttersonen p.g.a. de slag påkjenninger som fore-kommer under drift, viser det seg at de aksielle trykkspenningene hurtig reduseres, hvorfor den ovenfor névnte posi-tive virkningen blir uhyre liten. In order to increase the wear resistance and yield strength of the adapter as a whole, it is used to heat treat it by carbonisation. With this precaution, compressive stresses are achieved in the adapter's surface layer in both axial and tangential directions, which are intended to counteract the tensile stresses that occur during operation. However, it has been shown that this up-carbonisation negatively affects the stress pattern at side flushing holes with a circular cross-section. The tangential compressive stresses give an addition to those arising in operation, ak-i. the tensile stresses in the flushing hole edge on the hole diameter perpendicular to the axial direction of the adapter. Admittedly, the axial compressive stresses from the up-carbonisation initially counteract the negative effects from the tangential compressive stresses, but during the rearrangement phenomenon in the up-carbonised outer zone due to the kinds of stresses that occur during operation, it turns out that the axial compressive stresses are quickly reduced, which is why the above-mentioned positive effect is extremely small.
I det tilfellet då de sirkulære sidespylehullene er boret In the case where the circular side flush holes are drilled
i skrå vinkel mot adapterens akse, oppnås en viss reduksjon av påkjenningene i de tb områdene på' spylehullets kant som ligger i' det diametrale planet gjennom spylehullet vinkelrett mot adapterens akse ved at konturene hos sidespylehullets kant får elliptisk form. Ettersom sidespylehullet imidlertid-har sirkulært tverrsnitt kreves' det f ler 'enn ett hull, nemlig vanligsvis to, ettersom diameteren hos "det sirkulære sidespylehullet ikke kan gjøres altfor stor, men spyletiullets tverrsnittsaréal allikevel iriå tilsvare hovedsaklig arealet hos adapterens aksielle spylehull. at an oblique angle to the axis of the adapter, a certain reduction of the stresses is achieved in the tb areas on the edge of the flush hole which lie in the diametrical plane through the flush hole perpendicular to the axis of the adapter by the contours of the edge of the side flush hole taking on an elliptical shape. However, as the side flushing hole has a circular cross-section, more than one hole is required, namely usually two, as the diameter of the circular side flushing hole cannot be made too large, but the cross-sectional area of the flushing nozzle will still correspond mainly to the area of the adapter's axial flushing hole.
Oppfinnelsen har til1'formål-å' tilveiebringe en hålsadapter som ér forsynt med et eneste sidespylehull, hvilket har slik tverrsnittsform at spenningskonsentrasjonene ved den ytre sidespyléhulls kanten reduseres samtidig som antallet :for" bruddstart'følsomme Hullkanter minsker med halvparten, "' hvilket også fører til at 'sannsynlighéten for utmatningssprekker forårsaket sammesteds av déri': rotérendé bøyepå-kjenningen på adapteren reduseres. The purpose of the invention is to provide a hole adapter which is provided with a single side flush hole, which has such a cross-sectional shape that the stress concentrations at the outer edge of the side flush hole are reduced at the same time as the number of hole edges sensitive to "break initiation" is reduced by half, which also leads to to that 'the probability of yield cracks caused at the same place by there': rotéréndé bending stress on the adapter is reduced.
Det nye og kjennetegnende hos adapteren ifølge oppfinnelsen fremgår av patentkravene. The new and characteristic feature of the adapter according to the invention appears from the patent claims.
Takket være at tverrsnittsarealet hos spylehullet i adapteren ifølge oppfinnelsen kari gjøres større ved at hullets tverrsnitt er avlangt parallelt med adapterens aksielle retning, kreves det ikke lenger fler enn ett eneste sidespylehull ettersom tverrsnittsarealet hos dette kan gjøres like stort som tverrsnittsarealet hos adapterens aksielle spylehull. Ved at sidespylehullet nå ligger på kun en side av adapteren, minsker risikoene for at hullet befinner seg i sonen med den største påkjenningen m.h.t. den roterende bøyeutmatningen under drift. Thanks to the fact that the cross-sectional area of the flushing hole in the adapter according to the invention can be made larger by the hole's cross-section being elongated parallel to the adapter's axial direction, more than one single side flushing hole is no longer required as the cross-sectional area of this can be made as large as the cross-sectional area of the adapter's axial flushing hole. As the side flush hole is now only on one side of the adapter, the risks of the hole being in the zone with the greatest stress in terms of the rotary bend output during operation.
Oppfinnelsen beskrives i detalj i det etterfølgende under henvisning til vedlagte tegning, på hvilken fig. 1 er et sideriss av en utførelsesform av en halsadapter ifølge oppfinnelsen, og fig. 2 viser et snitt gjennom spylehodet i adapteren ifølge fig. 1. The invention is described in detail below with reference to the attached drawing, in which fig. 1 is a side view of an embodiment of a neck adapter according to the invention, and fig. 2 shows a section through the flushing head in the adapter according to fig. 1.
Den på tegningen viste adapter har en slagflate 1 for bore-maskinens slagestempel, bommer 2 for dreining av adapteren under boring og en ytre gjenge 3 for påskruing av en skjøte-hylse. Snittrisset i fig. 2 viser et snitt gjennom et spylehode 4. Spylehodet er ikke vist i fig. 1. Spylehodet om-slutter adapterens avlange sidespylehull 5 som munner i det aksielle spylehullet 6. Spylehodet 4 har en innløpstil-kobling 7 på hvilken kan kobles eksempelvis en slange for tilførsel av spylevann. Spylehodet 4 er montert glidbart på adapteren via tetningsringer 8. Sidespylehullet 5 for-, løper vinkelrett mot det aksielle spylehullet 6 og det til-veiebringes ved hjelp av f.eks. en pinnfres, hvilket inne-bærer at dets to ender 9 har formen av halvsylindrer mens dets sider 10 forløper parallelt med adapterens akseretning. The adapter shown in the drawing has an impact surface 1 for the drilling machine's impact piston, booms 2 for turning the adapter during drilling and an external thread 3 for screwing on a joint sleeve. The cross-section in fig. 2 shows a section through a flush head 4. The flush head is not shown in fig. 1. The flushing head encloses the adapter's oblong side flushing hole 5 which opens into the axial flushing hole 6. The flushing head 4 has an inlet connection 7 to which a hose for supplying flushing water can be connected, for example. The flushing head 4 is slidably mounted on the adapter via sealing rings 8. The side flushing hole 5 runs perpendicular to the axial flushing hole 6 and it is provided with the help of e.g. an end mill, which means that its two ends 9 have the shape of half-cylinders while its sides 10 run parallel to the axis direction of the adapter.
I det foregående er blitt beskrevet en spesiel utførelses-form av halsadapteren ifølge oppfinnelsen, men oppfinnelsen er ikke begrenset til denne spesiellé utførelsesform, men omfatter alle de utførelsesformer som kan tenkes å falle innenfor rammen av patentkravene. In the foregoing, a special embodiment of the neck adapter according to the invention has been described, but the invention is not limited to this particular embodiment, but includes all the embodiments that can be thought of as falling within the scope of the patent claims.
Claims (2)
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 (3)
Publication Number | Publication Date |
---|---|
NO802118L NO802118L (en) | 1981-05-04 |
NO152618B true NO152618B (en) | 1985-07-15 |
NO152618C NO152618C (en) | 1985-10-23 |
Family
ID=20339237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO802118A NO152618C (en) | 1979-11-02 | 1980-07-14 | NECK ADAPTER FOR MOUNTAIN DRILLING MACHINE. |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA1160214A (en) |
NO (1) | NO152618C (en) |
SE (1) | SE432460B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE523521C2 (en) * | 2002-09-27 | 2004-04-27 | Atlas Copco Rock Drills Ab | Impact adapter for transfer of stroke and rotation from a striking rock drill to a drill string |
SE531086C2 (en) * | 2007-04-25 | 2008-12-16 | Atlas Copco Secoroc Ab | Device for rock drilling |
EP2944756B1 (en) * | 2014-05-13 | 2017-04-05 | Sandvik Intellectual Property AB | Shank adapter with reinforced flushing slot |
-
1979
- 1979-11-02 SE SE7909103A patent/SE432460B/en not_active IP Right Cessation
-
1980
- 1980-07-14 NO NO802118A patent/NO152618C/en unknown
- 1980-10-21 CA CA000362899A patent/CA1160214A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NO152618C (en) | 1985-10-23 |
SE432460B (en) | 1984-04-02 |
CA1160214A (en) | 1984-01-10 |
SE7909103L (en) | 1981-05-03 |
NO802118L (en) | 1981-05-04 |
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