GB2239033A - Rotary mineral cutting head - Google Patents
Rotary mineral cutting head Download PDFInfo
- Publication number
- GB2239033A GB2239033A GB9026261A GB9026261A GB2239033A GB 2239033 A GB2239033 A GB 2239033A GB 9026261 A GB9026261 A GB 9026261A GB 9026261 A GB9026261 A GB 9026261A GB 2239033 A GB2239033 A GB 2239033A
- Authority
- GB
- United Kingdom
- 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.)
- Withdrawn
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 6
- 239000011707 mineral Substances 0.000 title claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 7
- 230000005291 magnetic effect Effects 0.000 claims description 4
- 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
- 238000005553 drilling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009826 distribution 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
A rotary, mineral cutting head (1), comprises a hollow body portion provided with a plurality of relatively fine water passageways (11) to convoy, 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
ROTARY CUTTING HEAD
This invention relates to a rotary cutting bead particularly, though not exclusively, for the cutting of minerals such as rock by a so-called roadheader machine for example.
With 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. As a means of minimising the airborne dust generated, conventional 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 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) distribution passageways, but inevitably in the course of manufacture/repair/refurbishing difficulties are encountered in ensuring that all the drillings 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 again might inadvertently cause blockage of water passageways. In addition a t'clean" water supply cannot always be guaranteed, particularly in mine conditions, and consequently
contamination might be introduced into the head by the water
supply.
According to the present invention there is provided 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.
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
time to time during inspection and/or servicing of the head.
The drain plug may be provided adjacent a nose end of the head whereby, to effect drainage and clearance of debris, silt etc., the boom is angled downwardly towards the floor, to direct debris etc. towards the drain hole. Alternatively, the drain plug may be provided remote from a nose end of the head, so 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" BS plug, and may be produced from stainless steel, may be cadmium plated, or may be magnetic or have a magnetic insert to control the circulation within the head of fine, loose particles of ferro-magnetic material.
Furthermore, the drain plug itself may be provided with
a tortuous patb, 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,
by way of example, with reference to the accompanying drawings
in which:
Figure 1 is a plan view of the rotary cutting head;
and
Figure 2 is an axial sectional 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
which the head 1 is attacbed 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
supply of pressurised water. From the reservoir, water is
conveyed in a conventional manner along relatively fine
passageways 11 to water spray nozzles 12 on or adjacent each
pick box and on the mounting collar 4.
In accordance with the invention, a relatively large tapped hole 13 is provided in the head 1 and is normally
plugged by a screw threaded BS 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 blocking the fine passageways 11 and hence making ineffective some of the spray nozzles 12 and consequently reducing the dust suppressing etc. effect of water sprays 15 issuing 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. ii 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898928133A GB8928133D0 (en) | 1989-12-13 | 1989-12-13 | Rotary cutting head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9026261D0 GB9026261D0 (en) | 1991-01-16 |
| GB2239033A true GB2239033A (en) | 1991-06-19 |
Family
ID=10667869
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898928133A Pending GB8928133D0 (en) | 1989-12-13 | 1989-12-13 | Rotary cutting head |
| GB9026261A Withdrawn GB2239033A (en) | 1989-12-13 | 1990-12-03 | Rotary mineral cutting head |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898928133A Pending GB8928133D0 (en) | 1989-12-13 | 1989-12-13 | Rotary cutting head |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2031620A1 (en) |
| GB (2) | GB8928133D0 (en) |
Citations (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 |
| GB2058175A (en) * | 1979-09-18 | 1981-04-08 | Hall & Pickles Ltd | Rotary Cutting Head |
| EP0105047A1 (en) * | 1982-09-03 | 1984-04-04 | VOEST-ALPINE Aktiengesellschaft | Cutting drum for tunneling 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
Patent Citations (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 |
| GB2058175A (en) * | 1979-09-18 | 1981-04-08 | Hall & Pickles Ltd | Rotary Cutting Head |
| EP0105047A1 (en) * | 1982-09-03 | 1984-04-04 | VOEST-ALPINE Aktiengesellschaft | Cutting drum for tunneling machines |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2031620A1 (en) | 1991-06-14 |
| GB8928133D0 (en) | 1990-02-14 |
| GB9026261D0 (en) | 1991-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0193268B1 (en) | Mineral cutter pick | |
| EP0052977B1 (en) | A pick and holder assembly and a pick and a holder for such an assembly | |
| US3544166A (en) | Cutter tools and mountings therefor | |
| CA1122234A (en) | Tools for mineral winning machines | |
| US4540056A (en) | Cutter assembly | |
| AU2010234357A1 (en) | Rotatable cutting tool-tool holder-base assembly | |
| PL197131B1 (en) | Cutting tool assembly with replaceable spray nozzle housing | |
| CN107060754B (en) | A kind of top bore pick and its cutterhead | |
| GB2239033A (en) | Rotary mineral cutting head | |
| GB2127459A (en) | Mining machines | |
| US4978173A (en) | Holder for cutter in mining machine | |
| CA2056804C (en) | Mineral mining equipment etc. | |
| CN107060755B (en) | A kind of top bore pick and its cutterhead | |
| US4552487A (en) | Mine roof support unit having dust suppression means | |
| DE3561521D1 (en) | Cutting head of a rock-cutting machine, especially a selective-cut heading machine | |
| EP0086040A2 (en) | Mineral cutting tool | |
| DE3202315A1 (en) | Loosening tool for a winning machine in underground mining | |
| DE3334031C2 (en) | ||
| US6536847B2 (en) | Pick box for housing a mineral cutter pick | |
| US4394053A (en) | Nozzle holder for cutter drum in longwall mining machinery | |
| DE3128049C1 (en) | Nozzle protection for a spray nozzle of a mining mining roller | |
| US6409276B1 (en) | Water-jet assisted drum-type mining system | |
| GB2182698A (en) | Mineral cutter pick | |
| CN218991577U (en) | Rear-mounted toothholder of nozzle | |
| CA2048403A1 (en) | Rotary cutting head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |