GB2113743A - Improvements in or relating to mineral cutter tools - Google Patents
Improvements in or relating to mineral cutter tools Download PDFInfo
- Publication number
- GB2113743A GB2113743A GB08209610A GB8209610A GB2113743A GB 2113743 A GB2113743 A GB 2113743A GB 08209610 A GB08209610 A GB 08209610A GB 8209610 A GB8209610 A GB 8209610A GB 2113743 A GB2113743 A GB 2113743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pick
- shank
- mineral
- passage
- cutter
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 33
- 239000011707 mineral Substances 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000005065 mining Methods 0.000 claims abstract description 8
- 230000004308 accommodation Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000003245 coal Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/187—Mining picks; Holders therefor with arrangement of fluid-spraying nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A mineral cutter pick adapted to be mounted on a mineral mining machine and to cut during translational movement in an endless path thereon which pick comprises a body having a shank 3 of circular cross section for accommodation in a correspondingly shaped recess 4 on a support 5 on a mineral cutting machine to mount the pick on the machine, said shank being adjacent its inner end not substantially less in diameter than at its outer end, the body having a forward end carrying a cutting tip 2 and said body having a passage 9, 10, 12, 13 therethrough for liquid which passage leads from an inlet in the shank to at least one liquid outlet adjacent to the cutting tip. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to mineral cutter tools
The invention relates to mineral cutter tools and more particularly but not exclusively to coal cutter picks of the kind adapted to be mounted on coal cutting machinery such as disc shearer drums, road heading machines or cutter chains.
It is now common practice in underground mining to provide water sprays close to the point of contact of the pick and the material being cut to suppress the formation of dust and to damp down possible sparking. It is known for the water spray to be supplied via a passage extending through the body of the pick and such arrangements are described in U.K. Patent Specification No.
1144340 of Austin Hoy 8 Company Limited and
U.S. Patent Specification No. 3273940 of
Charbonnages De France. Since it is usual for the picks to be replaceable most designs currently in use rely on some form of mechanical water seal, e.g. a rubber O-ring between the pick and its support to prevent, as far as possible, the escape of water other than through the passage leading to the water spray outlet.
The arrangements described in U.K. Patent
Specification No. 1144340 necessitate the use of a wide pick body and consequently a wide cutter tip is required to cut clearance for the body. In some mining conditions wide cutter tips are undesirable and accordingly it is an object of the invention to provide an arrangement which permits the use of narrow cutter tips.
A serious disadvantage of known mineral cutter tools incorporating internal passages through which water is supplied to the cutter tip is that if the water outlet in the pick body becomes obstructed and the water pressure is maintained, there is a danger that the build up of water pressure will tend to force the tool from its support, which at best would reduce the efficiency of the mining machine and which could also constitute a hazard to safety. It is an object of the invention to provide an arrangement in which this danger is obviated.
The invention provides a mineral cutter pick adapted to be mounted on a mineral mining machine and to cut during translational movement in an endless path thereon which pick comprises a body having a shank of circular cross section for accommodation in a correspondingly shaped recess on a support on a mineral cutting machine to mount the pick on the machine, said shank being adajcent its inner end not substantially less in diameter than at its outer end the body having a forward end carrying a cutting tip and said body - having a passage therethrough for liquid which passage leads from an inlet in the shank to at least one liquid outlet adjacent to the cutting tip.
Preferably the shank is tapered so that it is frustoconical in shape. Preferably the holder is arranged such that when the socket of the pick is mounted in the holder the free end of the pick shank is accessible so as to facilitate removal of the pick.
Preferably the water passage comprises a radial passage opening through the side wall of the shank the radial passage being arranged for alignment with a water passage extending into the socket in the holder. If desired the radial passage in the shank may have an enlarged portion where it emerges from the shank to improve ease of alignment or alternatively or additionally to accommodate a resilient sealing member e.g. a rubber O-ring if desired. The radial passage in the pick shank may communicate with a longitudinally extending passage in the pick shank which extends into the vicinity of the cutting tip and from the forward end of which one or more passages are arranged to emerge through the body of the pick adjacent to the cutter tip.For example one passage may be arranged to emerge from the pick body in front of the cutter tip and another may be arranged to emerge from the pick body immediately behind the cutting tip. If desired water issuing from the or each outlet adjacent to the cutting tip may be arranged to impinge on a surface of the pick body so that the stream of water is deflected and the formation of a spray enhanced. For this purpose the liquid outlet may be disposed in a groove formed in the pick body so that the stream of water impinges on one face of the groove.
From another aspect the invention comprises the combination of a mineral cutter pick as described above and a holder therefor.
The invention is diagrammatically illustrated by way of example in the accompanying drawings in which: Figure 1 is a cross sectional side elevation of a mineral cutter pick in accordance with the invention mounted in a holder on a mineral mining machine;
Figure 2 is a scrap cross sectional side elevation of the forward end of a modified form of mineral mining pick;
Figure 3 is a plan view of the arrangement shown in Figure 2; and
Figure 4 is a view, generally similar to that of
Figure 1, of a modified form of mineral cutter pick.
In the drawings there is shown a coal cutter pick comprising a body 1 formed at its forward end with a cutting tip 2 of a hard material such as tungsten carbide the body being formed with a frusto-conical shank 3 arranged for reception with a tight wedging fit in a correspondingly shaped socket 4 in a support 5 welded to the vane 6 of a mineral shearer drum not shown.
The inner end of the socket 4 of the holder 5 is terminated by a transverse slot 20 which extends through the holder to expose the rearward end of the shank 3 of a pick mounted in the holder. In this manner removal of the pick from the holder is facilitated since a tool, e.g. a wedge, may be engaged with the rear end of the pick to force it from the holder.
A water conduit 7 is provided extending through the vane of the mineral shearer drum which conduit connects with a conduit 8 which extends through the holder 5 and emerges into the socket 4. The mineral cutter pick 1 is formed with a radially extending bore in its shank 3 which bore communicates with the passage 8 in the holder and the radial bore 10 connects with a longitudinally extending bore 9 which extends forwardly into the vicinity of the cutting tip 2 and which communicates with bores 12 and 13 which emerge from the body of the pick near the front face and rear face respectively of the cutting tip 2.
The rearward end of the bore 9 which may be formed by drilling is plugged as shown at 1 4. The radially outer end of the bore 10 may be enlarged as shown at 11 to facilitate alignment with the bore 8 and also perhaps to accommodate, if desired, resilient sealing means such as a rubber
O-ring (not shown). It is thought that since the action of cutting forces on the pick is to tend to force the shank more firmly into the socket a sufficient seal will be provided by the mating faces of the shank and socket without the need for additional water sealing means. The passage 1 3 emerges from the pick body behind the cutting tip 2 into a, groove 1 5 machined in the surface of the pick body.
In Figures 2 and 3 there is shown an arrangement generally similar to that described above except that the passage 13 emerges from the pick body behind the cutting tip 2 through one face of a generally V-shaped groove 1 6 such that the water impinges against the opposite face 1 7 of the groove and is deflected in the direction of the arrow L (Figure 2) to facilitate formation of a spray.
In Figure 4 of the drawings there is shown an embodiment of pick and holder which is generally similar to that shown in Figure 1, except that here the pick has a forward end which is conical in shape and which is terminated by a pointed, conical hard cutter tip 2. Also the pick body is formed, at the junction between its forward end and its shank with an opposed pair of flat faces 19, only one of which is visible in the drawing, which are arranged to mate with and to be received in a slot 1 8 extending across the top of the holder 5. In this manner the pick is positively prevented from rotating in the holder in use. It will be noted that in this embodiment the arrangements for feeding water to the tip of the pick are the same as that described above with reference to Figure 1. Thus water is fed to the tip of the pick via a bore which enters the pick through the side of the shank, the taper of the shank in the socket in the holder providing a water seal without the need for additional means.
Claims (2)
1. A mineral cutter pick adapted to be mounted on a mineral mining machine and to cut during translational movement in an endless path thereon which pick comprises a body having a frusto-conical shank for accommodation in a correspondingly shaped recess on a support on a mineral cutting machine to mount the pick on the machine, said shank being adjacent its inner end not substantially less in diameter than at its outer end, the body having a forward end carrying a cutting tip and said body having a passage therethrough for liquid which passage leads from an inlet in the side wall of the shank to at least one liquid outlet adjacent to the cutting tip.
1 0. The combination of a mineral cutter pick as claimed in any preceding claim and a holder therefor.
11. The combination according to claim 10.
wherein the holder is arranged such that when the socket of the pick is mounted in the holder the free end of the pick shank is accessible so as to facilitate removal of the pick from the holder.
12. The combination according to claims 10 or 11, substantially as hereinbefore described with reference to, and as illustrated in, any of the accompanying drawings.
New claims or amendments to claims filed on 28 April 1983.
Superseded claims 1 and
2.
New or amended claims: Claims 3-1 2 renumbered as 2-11 1 and appendancies corrected
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08209610A GB2113743B (en) | 1981-09-19 | 1982-04-01 | Improvements in or relating to mineral cutter tools |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8128387 | 1981-09-19 | ||
GB08209610A GB2113743B (en) | 1981-09-19 | 1982-04-01 | Improvements in or relating to mineral cutter tools |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2113743A true GB2113743A (en) | 1983-08-10 |
GB2113743B GB2113743B (en) | 1985-01-16 |
Family
ID=26280752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08209610A Expired GB2113743B (en) | 1981-09-19 | 1982-04-01 | Improvements in or relating to mineral cutter tools |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2113743B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0143514A2 (en) * | 1983-09-02 | 1985-06-05 | Anderson Strathclyde Plc | Improvements in or relating to mineral cutter tools |
EP0151230A1 (en) * | 1984-02-01 | 1985-08-14 | BELZER-DOWIDAT GMBH Werkzeug-Union | Mining tool |
EP0234793A1 (en) * | 1986-02-19 | 1987-09-02 | Minnovation Limited | Tip and mineral cutter pick |
US4902073A (en) * | 1987-10-26 | 1990-02-20 | Tomlinson Peter N | Cutter pick for mining using hydraulic stream |
-
1982
- 1982-04-01 GB GB08209610A patent/GB2113743B/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0143514A2 (en) * | 1983-09-02 | 1985-06-05 | Anderson Strathclyde Plc | Improvements in or relating to mineral cutter tools |
EP0143514A3 (en) * | 1983-09-02 | 1986-09-24 | Anderson Strathclyde Plc | Improvements in or relating to mineral cutter tools |
EP0151230A1 (en) * | 1984-02-01 | 1985-08-14 | BELZER-DOWIDAT GMBH Werkzeug-Union | Mining tool |
EP0234793A1 (en) * | 1986-02-19 | 1987-09-02 | Minnovation Limited | Tip and mineral cutter pick |
US4902073A (en) * | 1987-10-26 | 1990-02-20 | Tomlinson Peter N | Cutter pick for mining using hydraulic stream |
Also Published As
Publication number | Publication date |
---|---|
GB2113743B (en) | 1985-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4443038A (en) | Mineral cutter tool having water emission deflection surface | |
US5220967A (en) | Drill and self-centering cutter insert therefor | |
US4765686A (en) | Rotatable cutting bit for a mining machine | |
EP1127213B1 (en) | Cutting bit support member with a flange provided with an undercut for removal | |
AU2005309142B2 (en) | Chisel holder | |
US4280735A (en) | Non-rotary mining cutter with recessed nozzle insert | |
EP0052977B1 (en) | A pick and holder assembly and a pick and a holder for such an assembly | |
EP0121020B1 (en) | A mineral mining pick and holder assembly | |
US4657308A (en) | Mineral cutter pick | |
US4902073A (en) | Cutter pick for mining using hydraulic stream | |
US4913125A (en) | Cutter picks | |
EP0234793A1 (en) | Tip and mineral cutter pick | |
US9719348B2 (en) | Chisel holder | |
US4663893A (en) | End deflector for abrasive water jet slot cutter | |
US4415208A (en) | Cutter bit assembly | |
US3751114A (en) | Cutter bit and block | |
GB2471931A (en) | Rock pick water spray assembly | |
CA1118459A (en) | Process of and an arrangement for mining | |
US4668018A (en) | Rotary cutter with spray nozzles for removal of ores from mine faces | |
GB2113743A (en) | Improvements in or relating to mineral cutter tools | |
CA1154040A (en) | Means for holding cutter bits | |
US4978173A (en) | Holder for cutter in mining machine | |
EP0143514A2 (en) | Improvements in or relating to mineral cutter tools | |
CN109025992B (en) | Knife holder protective sleeve for knife holders of trenchers and coal mining machines | |
GB2144787A (en) | Mineral cutter pick and box combination and rotary cutting head incorporating same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |