SE1350088A1 - Rock drilling Seal - Google Patents
Rock drilling Seal Download PDFInfo
- Publication number
- SE1350088A1 SE1350088A1 SE1350088A SE1350088A SE1350088A1 SE 1350088 A1 SE1350088 A1 SE 1350088A1 SE 1350088 A SE1350088 A SE 1350088A SE 1350088 A SE1350088 A SE 1350088A SE 1350088 A1 SE1350088 A1 SE 1350088A1
- Authority
- SE
- Sweden
- Prior art keywords
- stem
- dust
- controlling device
- bristles
- sheet structure
- Prior art date
Links
- 239000011435 rock Substances 0.000 title claims abstract description 41
- 238000005553 drilling Methods 0.000 title claims description 16
- 239000000428 dust Substances 0.000 claims abstract description 74
- 238000007789 sealing Methods 0.000 claims description 9
- 229920002994 synthetic fiber Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 description 29
- 241000272470 Circus Species 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 239000005445 natural material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
- E21B21/015—Means engaging the bore entrance, e.g. hoods for collecting dust
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
Abstract
13 Abstract The present invention relates to a dust controlling device (100) for rock drillingconsisting of an elastic sheet structure (101) having a circular hole (106)adapted for being penetrated by a drill bit (130) of a rock drill (116), thecircular hole having an edge (110), wherein a plurality of bristles (120) isprojecting from the edge (110) ofthe circular hole (106), wherein each bristle(120) projects toward a center (122) of the circular hole (106), the plurality ofbristles (120) projecting in such a way that the inward ends (124) of thebristles will engage with a stem (112) connected to the dri|| bit (130) whenaccommodated in the center (122) of the circular hole (106). For publication: Fig 1
Description
AWAPATENT AB Kontor/HandläggareMalmö/Daniel Enetoft/MBE Trelleborg Industri AB Ansökningsnr Vår referens SE-210614771 DUST CONTROLLING DEVICE FOR ROCK DRILLING Technical fieldThe present invention provides a dust controlling device for rock drilling, in particular a dust controlling device comprising a plurality of bristles.The present invention also comprises a method of using such a dust-controlling device for protecting a rock drill unit, as well as a rock drill unitcomprising such a dust controlling device.
Backqround of the invention When drilling rock, stones and sand particles, rock dust is forced outfrom the drilled hole and contaminates the surrounding area. Efforts havebeen made to seal off the area closest to the drilled hole using different typesof sealing equipment. lt is comparatively easy to seal at a distance from thedrill but it is more challenging to seal in the vicinity of the drill stem. Typically,the drill bit has a larger diameter than the drill stem and the drill rotates whendrilling. The sealing equipment must therefore be able to receive and bepenetrated by the drill bit and still be able to provide good sealing whenaccommodating the narrower drill stem.
For many years this sealing has been done by an elastic disc with ahole in the center of the disc which is adapted for receiving the stem. Thissolution is effectively preventing rock dust from escaping the drill hole andpolluting the area around the drill equipment. However, this solution hasanother problem. The durability of this elastic disc is limited to around 1-2days of service. After this time period, the seal brake since the material in thedisc is not flexible or strong enough to allow the drill from passing withoutbeing damaged. This is forcing the operator to stop drilling and replace theseal. The short replacement intervals are costly and unsatisfactory.
Summary of the invention The present invention generally aims at eliminating or at least reducingthe problems discussed above as well as other problems known in the art.This is accomplished with a dust controlling device in accordance with theappended claims.
According to a first aspect, the present invention is realized by a dustcontrolling device for rock drilling consisting of an elastic sheet structure having an upper and a lower surface and a circular hole adapted for beingpenetrated by a drill bit of a rock drill, the circular hole having an edge,wherein a plurality of bristles is projecting from the edge of the circular hole,wherein each bristle projects toward a center of the circular hole, the pluralityof bristles projecting in such a way that the inward ends of the bristles areadapted for engaging with a stem connected to the drill bit when the stem isaccommodated in the center of the circular hole _ As disclosed herein, the term “dust controlling device” relates to adevice for preventing dust from escaping in the vicinity of the drill stem of arock drill. Typically, the dust controlling device constitutes a part of a largerseal arrangement for preventing dust from coming out into the environmentclose to a rock drill unit.
As disclosed herein, the term “elastic sheet structure” relates to a flatstructure made by a single elastic material.
According to an embodiment of the present invention, at least onebristle of the plurality of bristles is made of a synthetic material. ln oneembodiment, all bristles are made of a synthetic material.
According to a further embodiment of the present invention, the sheetstructure further comprises a second elastic sheet structure projecting fromthe edge of the circular hole towards the center of the circular hole, thesecond elastic sheet structure being positioned closer to the lower surface ofthe sheet structure compared to the plurality of bristles.
According to a further embodiment of the present invention, at leastone bristle of the plurality of bristles projects further towards the center of thecircular hole compared to the second elastic sheet structure. The secondelastic sheet structure may for example project only half way towards thestem.
According to an embodiment of the present invention, each bristle ofthe plurality of bristles is fastened in a circular holder which is molded into theedge of the circular hole.
According to further embodiments, the second elastic sheet structuremay be molded into the edge of the circular hole.
The elastic sheet structure may have a thickness within the range of12 - 40 mm. ln a second aspect, the present invention provides a use of a dustcontrolling device according to the first aspect of the present invention, forpreventing rock dust from escaping a drill hole during rock drilling. 3 ln a third aspect, the present invention provides a rock dri|| unitcomprising a partial enclosure, a dri|| stem having a dri|| bit at one end and amachinery for rotating the dri|| stem, wherein the dri|| bit and part of the dri||stem is located in the partial enclosure which is adapted for sealing off thearea in proximity to the dri|| stem together with the rock in which a hole is tobe dri||ed, the enclosure having an opening adapted for receiving the dri||stem, wherein a dust-controlling sea| according to the first aspect of thepresent invention adapted for the dri|| stem has been arranged in the openingin such a way that the dri|| stem protrude through a circular opening of thedust-controlling sea|, thereby preventing dust from escaping through the sea|.
The second and third aspect may generally have the same featuresand advantages as the first aspect. lt is noted that the invention relates to all possible combinations offeatures recited in the claims. Generally, all terms used in the claims are to beinterpreted according to their ordinary meaning in the technical field unlessexplicitly defined otherwise herein.
Other objectives, features and advantages of the present invention willappear from the following detailed disclosure as well as from the drawings.
Brief description of the drawinqs This and other aspects of the present invention will now be describedin more detail, with reference to the appended drawings showingembodiments of the invention, wherein: Fig. 1 illustrates a perspective view of a dust controlling deviceaccording to an embodiment of the present invention.
Fig. 2 is a sectional drawing of the dust controlling device of Fig. 1.
Fig. 3 illustrates a perspective view of a dust controlling deviceaccording to an embodiment of the present invention, wherein an arcuateportion is cut away.
Fig. 4 illustrates the dust controlling device of Fig. 3 viewed frombelow.
Fig. 5 schematically illustrates a setup with the dust controlling deviceof Fig.3 in use.
Fig. 6 schematically illustrates a rock dri|| unit according to an aspect ofthe present invention.
Detailed descriptionThe present invention is based on the idea of providing a dust controlling device wherein the material being put under stress when using thedrill, i.e. the bristles, is flexible enough to not be broken but still resilientagainst being deformed when the drill bit is penetrating the dust controllingdevice or when the stem is rotated and jacked up and down while drilling. Atthe same time, the dust controlling device must provide a sufficiently solidenclosure against rock dust while drilling.
Since the stem of the drill has a smaller diameter than the drill bit, it isrequired that an opening of the dust controlling device, wherein the stem willbe accommodated while drilling, has a smaller diameter than the drill bit.Consequently, the drill will have to be forced through the dust controllingdevice; leading to that part of the dust controlling device is put under a lot ofstress while the drill bit is forced through. By using bristles as material forpreventing rock dust from being pushed out from the drill hole, the dustcontrolling device may be more durable against such stress. Consequently anincreased life time of the dust controlling device may be possible.
Moreover, since the dust controlling device needs to fit tightly aroundthe stem while drilling, to prevent rock dust from being pushed out of the drillhole, the dust controlling device may need to engage with the stem whiledrilling. This may lead to that the material closest to the stem will be put understress while drilling, since the stem will rotate and be jacked up and down. Byusing bristles as the material closest to the stem, the dust controlling devicemay be more durable against such stress. Consequently an increased lifetime of the dust controlling device may be possible.
A further advantage of the present invention may be that the plurality ofbristles is held in place by an elastic sheet structure. lf the drill, for somereason, starts to move unexpectedly in a lateral direction, the elastic sheetstructure may help to protect the stem from being damaged until the operatorof the drill has time to turn of the drill or until the drill is stabilizing again. Theelastic sheet structure may be made out of any material, such as anypolymer, more flexible than the material of the stem. An advantage of using apolymer may be that it is cheap to produce. The stem is often made out ofsteel but may be made out of any suitable material.
The bristle material should be resistant to wear, flexible and resilientagainst being deformed in both the direction in which the bristle projects fromthe elastic sheet structure and the direction perpendicular to the direction in 5 which the bristle projects from the elastic sheet structure. An exemplarymaterial may be nylon, polypropylene or polyester. ln further embodiments,natural material such as horsehair or hog's hair may be used.
Since the bristles are projecting from an edge of a circular hole towardsthe center of the hole, the area from which the bristles projects are larger thanthe area where the bristles end. Consequently, the bristles may be morespaced apart closer to the edge of the circular hole. This may lead to that rockdust may penetrate the bristles close to the edge of the circular hole. Toprevent such penetration, a second elastic sheet structure may be placedbeneath the bristles as a first seal from rock dust. The material of the secondelastic sheet structure may be a rubber material such as Natural Rubber,SBR, Nitrile, HNBR, Chloroprene, EPDM, Silicone, Viton, CPE, CSM, TPE orVamac. The second sheet structure is preferably very elastic, such asstretchable to an extent of 400-600%. ln the case the plurality of bristles forms the required dust seal close tothe stem, there is no need for the second elastic sheet structure to project aslong as the bristles. The second elastic sheet structure may for exampleproject only half way towards the stem. An advantage of this may be that thesecond elastic sheet structure is not put under the same amount of stress asthe bristles while operating the drill since it is not engaged with the stem. Thismay be advantageous since the wear of the second elastic sheet structuremay be reduced and consequently be more durable.
Each bristle of the plurality of bristles may be fastened in a circularholder which is molded into the edge of the circular hole. This may simplifythe production process of the dust controlling device. ln further embodimentsthe circular holder may be glued in a cavity in the edge of the elastic sheetstructure or fixed in such a cavity in any other suitable way.
The second elastic sheet structure may be an integral part of the sheetstructure. This may improve the durability of the second elastic sheetstructure. The second elastic sheet structure may also be molded into theedge of the circular hole. This may simplify the production process of the dustcontrolling device.
The present invention will now be described more fully hereinafter withreference to the accompanying drawings, in which currently preferredembodiments of the invention are shown. This invention may, however, beembodied in many different forms and should not be construed as limited tothe embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and fully convey the scope of the inventionto the skilled person.
Figs. 1 and 2 show by way of example the structure of an embodimentof the present invention. The shown dust controlling device 100 comprises anelastic sheet structure 101 having a circular hole 106. A plurality of bristles120 protrudes from an edge 110 of the circular hole 106. The plurality ofbristles is fastened in a circular holder 128 which is fixed in the elastic sheetstructure. The circular holder 128 may be fixed by ways of moulding or gluingor any other suitable way. The bristles 120 may be fixed in the circular holder128 in any suitable way. The circular holder 128 may for example be a clipholding the bristles 120. The bristles 120 projects from the edge 110 towardsa center 122 of the circular hole 106 in such a way that the inward ends 124of the bristles 120 forms a circular opening 108 in the dust controlling device100. The opening 108 has a diameter di. The circular hole 106 has adiameter d2. As will be shown below, the diameter d1 of the circular opening108 should be large enough such that the inward ends 124 of the bristles 120will engage with a stem of a rock drill when accommodated in the circularopening 108. The diameter d2 should be large enough such that a drill bit of arock drill can be forced through the circular hole 106. An advantage of usingbristles 120 in the way described in Figs. 1 and 2 may be that the durability ofthe dust controlling device 100 is prolonged. Since each individual bristle 120has such a small area being put under stress when forcing the drill bit pastthe bristle 120 or when operating the drill, the risk of deforming or breakingthe bristle 120 may be reduced. Moreover, since the seal consists of aplurality of bristles 120, the sealing properties of the seal may still besufficiently good even if one or more bristle 120 is deformed or broken.
The elastic sheet structure 101 may have a thickness within the rangeof 12 - 40 mm. These dimensions may comply with most of the rock drillingmachines on the market. Moreover, a thickness below 12 mm may lead toreduced service life. ln the embodiment shown in Figs. 1 and 2, the dust controlling device100 comprises several layers of bristles 120. This is only an exemplarydistribution of bristles 120. ln other embodiments, the dust controlling device100 comprises only one layer of bristles 120. ln further embodiments, thebristles that constitute one layer of bristles may overlap each other towardsthe inward ends 124 of the bristles.
The material of the bristles 120 may be any material that is resistant towear, flexible and resilient against being deformed. The plurality of bristlesmay be made out of the same material or different materials. Syntheticmaterials such as nylon or natural material such as horsehair may be used.An advantage of using a synthetic material such as nylon may be that it is acomparably cheap material. ln further embodiments, wire material such asberyllium copper or carbon steel may be used. An advantage of using wirematerials may be their wear resistance.
Figs. 3 and 4 show by way of example the structure of a furtherembodiment of the present invention. The dust controlling device 100 issimilar to the dust controlling device 100 shown in Figs. 1 and 2 and may thuspossess the same advantages and properties described above. The dustcontrolling device in Figs. 3 and 4 further comprises a second elastic sheetstructure 126 projecting from the edge 110 of the circular hole 106 towardsthe center 122 (as best seen in Fig. 2) of the circular hole 106. The secondelastic sheet structure 126 is positioned beneath the plurality of bristles 120,i.e. closer to a lower surface 104 of the elastic sheet structure 101 comparedto the plurality of bristles 120. As can be seen in Figs. 3 and 4, the secondelastic sheet structure 126 does not project as far towards the center 122 ofthe circular hole 106. Since a stem of a rock drill, in normal cases, will beaccommodated in the circular opening 108, this means that the second elasticsheet structure 126 normally will not engage with the stem, thus prolongingthe durability of the sheet structure 126. A further advantage of not having thesecond elastic sheet structure 128 protrude as far as the plurality of bristles120 may be that the area of the second elastic sheet structure 128 beingpushed away by a drill bit of the rock drill when forced through the dustcontrolling device 100 is smaller. Consequently, the compressive stress of thesecond elastic sheet structure 128 is smaller and thus the durability of thesecond elastic sheet structure 128 may be prolonged. The second elasticsheet structure 128 may be made of any material with a sufficient elasticity. lnone embodiment, the material of the second elastic sheet structure 128 is thesame as the material of the elastic sheet structure 101. ln this embodiment,the second elastic sheet structure 128 may be an integral part of the elasticsheet structure 101. ln further embodiments, the materials of the two elasticsheet structures 101, 128 differ. The second elastic sheet structure 128 maybe molded into the elastic sheet structure 101 or fastened in any othersuitable way such as gluing. ln a further embodiment, the second elastic sheet structure 126 may be positioned above the plurality of bristles 120, i.e.closer to a upper surface 102 of the elastic sheet structure 101 compared tothe plurality of bristles 120.
As best seen in Fig. 3, the bristles are more spaced apart closer to theedge of the circu|ar hole compared to the distribution of the bristles close tothe center of the circu|ar hole 106. This may lead to that rock dust maypenetrate the bristles close to the edge of the circu|ar hole. To prevent suchpenetration, the second elastic sheet structure may be placed either beneathor above the bristles as a first or second seal from rock dust.
The elastic sheet structure 101 in Figs. 1-4 may comprise a singlesheet or it may comprise several superposed elastic sheets which aremutually joined together. ln the later case, the circu|ar holder 128 and/or thesecond elastic sheet structure 126 may be fastened between two such layers.ln another embodiment, the bristles 120 are directly fastened between twosuch layers. The several superposed elastic sheets may be mutually joined toeach other in adhesions zones positioned on upper and/or lower surfaces ofthe sheets. The adhesion zones may be located along the outer and/or theinner edges of the sheets and have a width within the range of 15 - 40 mm.The above exemplary way of producing a dust controlling device 100 fromseveral superposed elastic sheets may be a simple production method whichreduces the need of molding.
As described above, the elastic sheet structure 101 may be made ofany material more flexible than the material of a stem of a rock drill whichuses the dust controlling device 100. The elastic sheet structure 101 may bemade of one or several materials. The one or several materials may forexample be a polymer, a plastic, Polyurethane, TPE and/or other flexiblesynthetic materials. ln other embodiments, the material may be textilereinforced to improve the durability of the elastic sheet structure 101. Thetextile reinforcement may of course be applied to the material of the secondelastic sheet element 126 and/or the material of the bristles 120. The elasticsheet structure 101 may have several functions. One function may be tosupport the plurality of bristles 120 or the circu|ar holder 128 in which thebristles 120 are fastened. Another function may be to support the secondelastic sheet structure 126. Yet another function may be to function as asafety structure in the case where the stem accommodated in the elasticsheet structure 101 starts to move in a lateral direction and thereby engageswith the edge 110 of the circu|ar hole 106. An advantageous feature in this 9 case is that the elastic sheet structure 101 breaks before the stem breaks,since it is both easier and cheaper to replace the dust controlling device 100than to replace the stem.
Fig. 5 shows by way of example a setup with the dust controllingdevice 100 in use according to an embodiment of the present invention. Thedust controlling device 100 is fastened in a larger dust controlling structure132 arranged to handle the dust controlling at a distance from the stem 112.ln Fig. 5, only a part of the larger dust controlling structure 132 is shown. Fig.5 shows a dust controlling device which is accommodating a stem 112connected to a drill bit 130. The stem 112 has a diameter ds which may beequal or slightly larger than the diameter d1 of the circular opening 108 shownin Fig. 2. This may cause the bristles 120 of the dust controlling device 100 toengage with the stem while drilling and thereby preventing rock dust from thedrilling to pierce thorough the dust controlling device 100 close to the stem112. The diameter d4 of the drill bit 130 should be smaller than the diameterd2 of the circular hole 106 of the elastic sheet structure, as best seen in Fig. 2,to be able to be forced through the dust controlling device 100 withoutbreaking it.
A more complete example of the larger dust controlling structure 132 isshown in Fig. 6. Fig. 6 shows by way of example a rock drill unit according toan aspect of the present invention. A rock drill 116 comprises a machinery134 for controlling a stem 112, i.e. rotating it and jacking it up and down. Thelarger dust controlling structure 132 is in this embodiment a partial enclosure132 which together with the rock 136 is adapted for sealing off the area inproximity to the stem 112. The partial enclosure 132 is in some embodimentsconnected to a suction apparatus (not shown) that will remove rock dust thatis captured by the partial enclosure 132. A part of the stem 112 and a drill bit130 are enclosed by the partial enclosure 132 such that rock dust producedwhile drilling is prevented from polluting the area around the enclosure 132.The partial enclosure has an opening (not shown) adapted for receiving thedrill stem 112. A dust controlling device 100 (not shown) is positioned in theopening of the partial enclosure which handles the sealing of the opening asexplained above.
The person skilled in the art realizes that the present invention by nomeans is limited to the preferred embodiments described above. On thecontrary, many modifications and variations are possible within the scope ofthe appended claims. For example, the outer geometry of the elastic sheet structure 101 is just shown by way of example to be cylindrical. Othergeometries, such a rectangular geometry, are equally possible.
Additionally, variations to the disclosed embodiments can beunderstood and effected by the skilled person in practicing the claimedinvention, from a study of the drawings, the disclosure, and the appendedclaims. ln the claims, the word "comprising" does not exclude other elementsor steps, and the indefinite article "a" or "an" does not exclude a plurality. Themere fact that certain measures are recited in mutually different dependentclaims does not indicate that a combination of these measured cannot beused to advantage
Claims (10)
1. A dust controlling device (100) for rock drilling consisting of an elastic sheetstructure (101) having an upper (102) and a lower (104) surface and a circularhole (106) adapted for being penetrated by a dri|| bit (130) ofa rock dri|| (116),the circular hole having an edge (110), wherein a plurality of bristles (120) isprojecting from the edge (110) ofthe circular hole (106), wherein each bristle(120) projects toward a center (122) of the circular hole (106), the plurality ofbristles (120) projecting in such a way that the inward ends (124) of thebristles are adapted for engaging with a stem (112) connected to the dri|| bit(130) when the stem (112) is accommodated in the center (122) of thecircular hole (106).
2. A dust controlling device according to claim 1, wherein at least one bristleof the plurality of bristles (120) is made of a synthetic material.
3. A dust controlling device (100) according to claim 1 or claim 2, wherein thesheet structure (101) further comprising a second elastic sheet structure (126)projecting from the edge (110) ofthe circular hole (106) towards the center(122) of the circular hole (106), the second elastic sheet structure beingpositioned closer to the lower (104) surface of the sheet structure (101)compared to the plurality of bristles (120).
4. A dust controlling device according to claim 3, wherein at least one bristleof the plurality of bristles (124) projects further towards the center (122) of thecircular hole (106) compared to the second elastic sheet structure (126).
5. A dust controlling device according to claim 4, wherein at least one bristleof the plurality of bristles (124) projects twice as long towards the center (122)of the circular hole (106) compared to the second elastic sheet structure(126). 12
6. A dust controlling device (100) according to claims 1-5, wherein eachbristle of the plurality of bristles (124) is fastened in a circular holder (128)which is molded into the edge of the circular hole.
7. A dust controlling device according to claims 3-6, wherein the secondelastic sheet structure (126) is molded into the edge of the circular hole.
8. A dust controlling device according to any of claims 1 - 7, wherein theelastic sheet structure has a thickness within the range of 12 - 40 mm.
9. Use of a dust controlling device according to any of claims 1 - 8, forpreventing rock dust from escaping a drill hole during rock drilling.
10. A rock drill unit comprising a partial enclosure (132), a stem (112) havinga drill bit (130) at one end and a machinery (134) for rotating the drill stem,wherein the drill bit (130) and part of the stem (112) is located in the partialenclosure (132) which is adapted for sealing off the area in proximity to thedrill stem together with the rock (136) in which a hole is to be drilled, theenclosure (132) having an opening adapted for receiving the drill stem (112)wherein a dust controlling device (100) according to any of claims 1 - 8adapted for the stem (112) has been arranged in the opening in such a waythat the stem (112) protrude through a circular opening (108) of the dust-controlling seal (100), thereby preventing dust from escaping through theopening.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1350088A SE537383C2 (en) | 2013-01-28 | 2013-01-28 | Dust control device for rock drilling, use of such device and rock drilling unit including such device |
| PCT/SE2013/051489 WO2014116159A1 (en) | 2013-01-28 | 2013-12-11 | Dust controlling device for rock drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1350088A SE537383C2 (en) | 2013-01-28 | 2013-01-28 | Dust control device for rock drilling, use of such device and rock drilling unit including such device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1350088A1 true SE1350088A1 (en) | 2014-07-29 |
| SE537383C2 SE537383C2 (en) | 2015-04-14 |
Family
ID=51227852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1350088A SE537383C2 (en) | 2013-01-28 | 2013-01-28 | Dust control device for rock drilling, use of such device and rock drilling unit including such device |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE537383C2 (en) |
| WO (1) | WO2014116159A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0306486D0 (en) * | 2003-03-21 | 2003-04-23 | Black & Decker Inc | Cordless hand held power tool with power accessory |
| US7823662B2 (en) * | 2007-06-20 | 2010-11-02 | New Era Petroleum, Llc. | Hydrocarbon recovery drill string apparatus, subterranean hydrocarbon recovery drilling methods, and subterranean hydrocarbon recovery methods |
-
2013
- 2013-01-28 SE SE1350088A patent/SE537383C2/en unknown
- 2013-12-11 WO PCT/SE2013/051489 patent/WO2014116159A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014116159A1 (en) | 2014-07-31 |
| SE537383C2 (en) | 2015-04-14 |
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