CA2031620A1 - Rotary cutting head - Google Patents
Rotary cutting headInfo
- Publication number
- CA2031620A1 CA2031620A1 CA 2031620 CA2031620A CA2031620A1 CA 2031620 A1 CA2031620 A1 CA 2031620A1 CA 2031620 CA2031620 CA 2031620 CA 2031620 A CA2031620 A CA 2031620A CA 2031620 A1 CA2031620 A1 CA 2031620A1
- Authority
- CA
- Canada
- Prior art keywords
- head
- drain plug
- water
- cutting head
- rotary
- 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.)
- Abandoned
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 239000011707 mineral Substances 0.000 claims abstract description 5
- 230000005291 magnetic effect Effects 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 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
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/23—Distribution of spraying-fluids in rotating cutter-heads
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)
- Nozzles (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
ABSTRACT
ROTARY CUTTING HEAD
A rotary, mineral cutting head (1), comprises a hollow body portion provided with a plurality of relatively fine water passageways (11) to convey, in use, pressurised water from a supply source to a plurality of water spray nozzles (12), with a drain plug (14) screwed into a tapped hole (13) in the cutting head (1), whereby the content of the head (1) may be periodically drained.
ROTARY CUTTING HEAD
A rotary, mineral cutting head (1), comprises a hollow body portion provided with a plurality of relatively fine water passageways (11) to convey, in use, pressurised water from a supply source to a plurality of water spray nozzles (12), with a drain plug (14) screwed into a tapped hole (13) in the cutting head (1), whereby the content of the head (1) may be periodically drained.
Description
2~31fi2~
ROT~RY CUTTING HEAD
This invention relates to a rotary cutting head particularly, though not exclusively, for the cuttin~ of minerals such as rock by 3 so-called roadheader machine for example.
5With such a machine, the cutting head is hollow and is mounted at one end of a boom carried on a machine chassis, with the boom capable of being displaced to various positions to cut a roadway or tunnel to the desired profile. ~s a means of minimising the airborne dust generated, convent~onal 10 practice is to provide a high pressure water supply to the cutting head for discharge from a plurality of water spray nozzles located at various points around the head, usually in the vicinity of picks with which the head is armed, and also usually in the vicinity of a terminal collar at one end of the 15 head, In order not only to maintain water pressure but also to minimize weakening of the head, the head is provided with relatively fine ~e.g., 5 mm) dlstrlbution passageways, but inevltably in the course of manufacture~repalr/refurblshlng difficulties are encountered ln ensuring that all the 20 drlllings are removed from the passageways, so as to avoid their blockage of the water flow. Furthermore although such heads are produced principally as a hollow casting, there are inevitably welding operations to be effected to the head, with inevitable splatter of weld metal which a~ain mi8ht 25 inadvertently cause blockage of water passageways. In addition a "clean" water supply cannot always be guaranteed, particularly in mine conditions, and consequently ,,,~ ,., . , :
, ' - 2 2~3~62~
contamination mlght be introduced into the head by the water supply.
According to the present invent~on there is provided a rotary, mineral cutting head, comprising a hollow body portion 5 provided with a plurality of relatively fine water passageways to convey, in use, pressurised water from a supply source to a plurality of ~ater spray nozzles, with a drain plug screwed into a tapped hole in the cutting head, whereby the content of the head may be periodically drainep.
Thus, with the head in accordance with the invention any drillings, weld splatter etc that may become detached during the course of use of the head can be allowed to accumulate within the head, and to be regularly removed from the head via the drain plug when the latter is removed from 15 time to time during inspection and/or servicing of the head.
The drain plug may be provided ad~aoent a nose end of the head whereby, to effect drainage and olearance of debris, silt etc., the boom i8 angled downwardly towards the floor, to direct debrls et¢. towards the drain hole. Alternatively, the 20drain pluB may be provided remote from a nose end of the head, 80 that the boom needs to be angled upwardly to effect drainage debris clearance, In detail the drain plug may be a 1.25 - 1.5" ~S plUB~
and may be produced from stainless steel, may be cadmium 25plated, or may be magnetlc or have a magnetic lnsert to control the ciroulation wlthin the head of fine, loose particles of ferro-magnetic material.
Furthermore, the drain plug itself may be provided with ' ' , ~ . ' .
', ' : ~.
' ' ~ ' ' ,' :
. .
ROT~RY CUTTING HEAD
This invention relates to a rotary cutting head particularly, though not exclusively, for the cuttin~ of minerals such as rock by 3 so-called roadheader machine for example.
5With such a machine, the cutting head is hollow and is mounted at one end of a boom carried on a machine chassis, with the boom capable of being displaced to various positions to cut a roadway or tunnel to the desired profile. ~s a means of minimising the airborne dust generated, convent~onal 10 practice is to provide a high pressure water supply to the cutting head for discharge from a plurality of water spray nozzles located at various points around the head, usually in the vicinity of picks with which the head is armed, and also usually in the vicinity of a terminal collar at one end of the 15 head, In order not only to maintain water pressure but also to minimize weakening of the head, the head is provided with relatively fine ~e.g., 5 mm) dlstrlbution passageways, but inevltably in the course of manufacture~repalr/refurblshlng difficulties are encountered ln ensuring that all the 20 drlllings are removed from the passageways, so as to avoid their blockage of the water flow. Furthermore although such heads are produced principally as a hollow casting, there are inevitably welding operations to be effected to the head, with inevitable splatter of weld metal which a~ain mi8ht 25 inadvertently cause blockage of water passageways. In addition a "clean" water supply cannot always be guaranteed, particularly in mine conditions, and consequently ,,,~ ,., . , :
, ' - 2 2~3~62~
contamination mlght be introduced into the head by the water supply.
According to the present invent~on there is provided a rotary, mineral cutting head, comprising a hollow body portion 5 provided with a plurality of relatively fine water passageways to convey, in use, pressurised water from a supply source to a plurality of ~ater spray nozzles, with a drain plug screwed into a tapped hole in the cutting head, whereby the content of the head may be periodically drainep.
Thus, with the head in accordance with the invention any drillings, weld splatter etc that may become detached during the course of use of the head can be allowed to accumulate within the head, and to be regularly removed from the head via the drain plug when the latter is removed from 15 time to time during inspection and/or servicing of the head.
The drain plug may be provided ad~aoent a nose end of the head whereby, to effect drainage and olearance of debris, silt etc., the boom i8 angled downwardly towards the floor, to direct debrls et¢. towards the drain hole. Alternatively, the 20drain pluB may be provided remote from a nose end of the head, 80 that the boom needs to be angled upwardly to effect drainage debris clearance, In detail the drain plug may be a 1.25 - 1.5" ~S plUB~
and may be produced from stainless steel, may be cadmium 25plated, or may be magnetlc or have a magnetic lnsert to control the ciroulation wlthin the head of fine, loose particles of ferro-magnetic material.
Furthermore, the drain plug itself may be provided with ' ' , ~ . ' .
', ' : ~.
' ' ~ ' ' ,' :
. .
- 3 - 203~62~
a tort~ous path, water-flow passage, to provide a visual indication as to the build up, if any, of debris etc. within the head The invention will now be described in greater detail, 5 by way of example, with reference to the accompanyin~ drawings in which:-Figure 1 is a plan view of the rotary cutting head;and Figure 2 is an asial sectipnal view through Figure 1.
In the drawings, a rotary cutting head 1 comprises a nose 2 and a base 3. The latter is attached to a mounting collar 4 having a plurality of countersunk bolt holes 5 by whioh the head 1 is attached to the boom of a roadheader type mining machine, The head 1 has a hollow interior 6 and an external periphery 7 to which are welded a plurality of pick boxes 8 each to receive a replaceable mineral cutter pick 9. The interior 6 constitutes a water reservoir supplied through an apertue 10 in the mounting collar 4, and in turn connected to a 209upply of pressurlsed water. From the reservoir, water is conveyed in a conventional manner along relatively fine passageways 11 to water spray nozzles 12 on or ad~acent each plck box and on the mountin~ collar 4.
In accordance with the invention, a relatively large 25tapped hole 13 i9 provided in the head 1 and is normally plugged by a screw threaded ~S plug 14, which enables the head of the invention to be regularly drained of any initial, or accumulating debris, with a view to avoiding such debris ,: ' ' ' :
2~31620 blocking the fine passageways 11 and hence making ineffecti~e some of the spray nozzles 12 and conseq~ently reducing the dust suppressing etc. effect of water sprays 1~ iss~ing from the nozzles 12.
a tort~ous path, water-flow passage, to provide a visual indication as to the build up, if any, of debris etc. within the head The invention will now be described in greater detail, 5 by way of example, with reference to the accompanyin~ drawings in which:-Figure 1 is a plan view of the rotary cutting head;and Figure 2 is an asial sectipnal view through Figure 1.
In the drawings, a rotary cutting head 1 comprises a nose 2 and a base 3. The latter is attached to a mounting collar 4 having a plurality of countersunk bolt holes 5 by whioh the head 1 is attached to the boom of a roadheader type mining machine, The head 1 has a hollow interior 6 and an external periphery 7 to which are welded a plurality of pick boxes 8 each to receive a replaceable mineral cutter pick 9. The interior 6 constitutes a water reservoir supplied through an apertue 10 in the mounting collar 4, and in turn connected to a 209upply of pressurlsed water. From the reservoir, water is conveyed in a conventional manner along relatively fine passageways 11 to water spray nozzles 12 on or ad~acent each plck box and on the mountin~ collar 4.
In accordance with the invention, a relatively large 25tapped hole 13 i9 provided in the head 1 and is normally plugged by a screw threaded ~S plug 14, which enables the head of the invention to be regularly drained of any initial, or accumulating debris, with a view to avoiding such debris ,: ' ' ' :
2~31620 blocking the fine passageways 11 and hence making ineffecti~e some of the spray nozzles 12 and conseq~ently reducing the dust suppressing etc. effect of water sprays 1~ iss~ing from the nozzles 12.
Claims (10)
1. A rotary, mineral cutting head, comprising a hollow body portion provided with a plurality of relatively fine water passageways to convey, in use, pressurised water from a supply source to a plurality of water spray nozzles, with a drain plug screwed into a tapped hole in the cutting head, whereby the content of the head may be periodically drained.
2. A head as claimed in Claim 1, wherein the drain plug is provided adjacent a nose end of the head.
3. A head as claimed in Claim 1, wherein the drain plug is provided remote from a nose end of the head.
4. A head as claimed in any preceding Claim, wherein the drain plug is a 1.25 - 1.5"BS plug.
5. A head as claimed in any preceding Claim, wherein the drain plug is of stainless steel.
6. A head as claimed in any one of Claims 1 to 4, wherein the drain plug is cadmium plated.
7. A head as claimed in any one of Claims 1 to 4 and 6, wherein the drain plug is magnetic.
8. A head as claimed in any one of Claims 1 to 6, wherein the drain plug has a magnetic insert.
9. A head as claimed in any preceding Claim, wherein the drain plug is provided with a tortuous path, water-flow passage.
10. A rotary cutting head substantially as hereinbefore described with reference to the accompanying drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898928133A GB8928133D0 (en) | 1989-12-13 | 1989-12-13 | Rotary cutting head |
| GB8928133.1 | 1989-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2031620A1 true CA2031620A1 (en) | 1991-06-14 |
Family
ID=10667869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2031620 Abandoned CA2031620A1 (en) | 1989-12-13 | 1990-12-05 | Rotary cutting head |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2031620A1 (en) |
| GB (2) | GB8928133D0 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1516843A (en) * | 1975-07-30 | 1978-07-05 | Jax General Engs Co Ltd | Mining machines |
| GB1525026A (en) * | 1975-11-18 | 1978-09-20 | Allen T | Rotary mineral cutter |
| GB2058175B (en) * | 1979-09-18 | 1983-03-16 | Hall & Pickles Ltd | Rotary cutting head |
| AT375152B (en) * | 1982-09-03 | 1984-07-10 | Voest Alpine Ag | SCREW HEAD FOR TRACK DRIVING MACHINES |
-
1989
- 1989-12-13 GB GB898928133A patent/GB8928133D0/en active Pending
-
1990
- 1990-12-03 GB GB9026261A patent/GB2239033A/en not_active Withdrawn
- 1990-12-05 CA CA 2031620 patent/CA2031620A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| GB8928133D0 (en) | 1990-02-14 |
| GB9026261D0 (en) | 1991-01-16 |
| GB2239033A (en) | 1991-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |