GB2246588A - Nozzle arrangement for a mineral cutter pick box - Google Patents
Nozzle arrangement for a mineral cutter pick box Download PDFInfo
- Publication number
- GB2246588A GB2246588A GB9114687A GB9114687A GB2246588A GB 2246588 A GB2246588 A GB 2246588A GB 9114687 A GB9114687 A GB 9114687A GB 9114687 A GB9114687 A GB 9114687A GB 2246588 A GB2246588 A GB 2246588A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nozzle
- sleeve member
- bore
- replaceable
- pick box
- 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 32
- 239000011707 mineral Substances 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000000717 retained effect Effects 0.000 claims abstract description 11
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 abstract description 9
- 238000005065 mining Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
A replaceable water spray nozzle arrangement for a mineral cutter pick box includes a sleeve member (17) fitted in a bore of the pick box from the rear thereof, and a nozzle (19) is inserted into the rear of the sleeve member (17) and retained therein by a quick release fitment, e.g a bayonet type fitment. <IMAGE>
Description
Mineral cutter pick boxes
The invention relates to mineral cutter pick boxes and to the provision of nozzles in such pick boxes for producing either a water spray or jet.
In the mining of minerals such as coal it is usual for a plurality of cutter pick boxes to be mounted at the periphery of an item of rotatable mining or quarrying equipment, such as a rotatable pick box carrying drum or a cutter head.
The cutter picks are mounted in the respective pick boxes of a rotatable drum by means of spigot and socket connections. Opposed end faces of each pick and its associated pick box abut together, and means are provided for releasably retaining the spigot or shank of the pick in the socket of the pick box by some suitable latching arrangement.
It is known for pick boxes as just described to be provided with nozzles for producing either a water spray or jet. However, such nozzles have usually been screwthreaded in position so that their removal when blocked by coal dust for example, and their subsequent replacement by new nozzles, has been a sometimes difficult and always time consuming operation. The object of the invention is to provide means for mounting a nozzle in a mineral cutter pick box whereby it is capable of being replaced, when necessary, very easily and in a minimum of time.
According to one aspect of the invention, there is provided a mineral cutter pick box having a nozzle receiving bore to which fluid under pressure can be ducted, the bore being provided with a sleeve member in which a replaceable nozzle can be slidably received from the rear of the pick box.
The replaceable nozzle will preferably be retained in position in the sleeve member by means of a quick release fitment such as a bayonet type fitment. A cylindrical filter element will preferably be located on the replaceable nozzle to be renewable with said nozzle. The sleeve member will preferably have a screwthreaded portion engaging a screwthreaded outer portion of the bore of the pick box.
The replaceable nozzle may have an elongate portion a nose part of which protrudes from the sleeve member when the nozzle has been entered into it, and, at its end remote from the nose part said nozzle, a head -portion which is received in a plain outer portion of the bore of the sleeve and retained therein by a bayonet type fitment, that is to say by a pair of oppositely projecting pins which can be received in undercut slots in the sleeve member to provide an "insert and twist" connection. At least one rubber O-ring will preferably be located on the nozzle beneath the head portion to have the dual function of sealing the assembly against the leakage of water around said head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
According to another aspect of the invention, there is provided a replaceable nozzle arrangement for a mineral cutter pick box as described above, the nozzle arrangement including a sleeve member having a screwthreaded portion for engaging a screwthreaded portion of the bore of the pick box, and a replaceable nozzle a nose part of an elongate portion of which protrudes from the sleeve member when said nozzle has been entered into it, said nozzle having, at an end remote from said nose part, a head portion which can be received in a plain outer portion of the bore of the sleeve and retained therein by a bayonet type fitment, that is to say by a pair of oppositely projecting pins which are received in undercut slots in the sleeve member to provide an "insert and twist connection.
The replaceable nozzle will preferably have at least one rubber O-ring located beneath its head portion to perform the dual function of sealing the assembly against the leakage of water around the head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
A cylindrical filter element may be located on the nozzle to be renewable therewith.
In order that the invention may be fully understood and readily carried into effect, the same will now be described, by way of example only, with reference to the accompanying drawings, of which:- Figure 1 is a section through a mineral cutter pick box,
Figure 2 is a view in the direction of arrow 2 in
Figure 1,
Figure 3 is an exploded view of a nozzle assembly for use in such a mineral cutter pick box,
Figure 4 is a view in the direction of arrow 4 in
Figure 3, and
Figure 5 is a view similar to Figure 3 which illustrates a modification of the nozzle assembly.
Referring now to Figures 1 and 2 of the drawings, the mineral cutter pick box there illustrated and generally indicated 10 has a socket 12 for the reception of a pick shank whereby opposed end faces of the pick and of the pick box can abut together and means (not shown) are provided for releasably retaining the spigot or shank of the pick in the pick box. The pick box also has water conveying passages 14 leading to a bore 16 in which is to be located a water spray nozzle assembly for the suppression of dust and the suppression of ignition during mineral mining operations. The arrangement is such that a water spray or jet will be directed towards the tip of a cutter pick located in the pick box.
Referring now in particular to Figure 3, the nozzle assembly there illustrated includes a sleeve member generally indicated 17, a cylindrical filter element 18 and a replaceable nozzle 19. The sleeve member has a screwthreaded portion 20 for engaging a screwthreaded outer portion of the bore 16 of the pick box. The sleeve member also has spaced lands 22 and 24 having grooves in which O-rings 26 are located to form fluid tight seals within a plain part of the bore 16 of the pick box on opposite sides of the water conveying passage 14 which breaks into said bore. Between the spaced lands 22 and 24 is a reduced diameter portion 28 which has pairs of diametrically opposite holes 30 at right angles to each other for the free flow of water into the interior of the sleeve member.
The replaceable nozzle 19 has an elongate portion 32 a nose part of which protrudes from the sleeve member when the nozzle has been entered into it, as shown in chain-dotted lines. A rubber O-ring 34 which encircles the elongate portion of the nozzle is arranged to enter a portion 36 of the bore of the sleeve member. At its end remote from the nose part, the nozzle has a head portion 38 which can be received in a plain outer portion 40 of the bore of the sleeve member and retained therein by a bayonet type fitment, that is to say by a pair of oppositely projecting pins 42 which can be received in undercut slots 44 in the sleeve member to provide an "insert and twist" connection. A pair of rubber O-rings 46 which are located on the nozzle beneath the head portion have the dual purpose function of sealing the assembly against the leakage of water around the head portion and of providing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
The nozzle 19 has an axial bore 48 which terminates in a relatively small exit passage 50 through which water can pass in the form of a spray or jet. An outer end of the axial bore 48 is closed by a plug 52. A part of the elongate portion of the nozzle has a hole 54 extending through its wall for the flow of water into the axial bore 48, that part of said elongate portion being closely surrounded by the cylindrical filter element 18 when the nozzle has been entered into the sleeve member. As shown in chain-dotted lines in Figure 3, the filter element is located in position on the nozzle, and held in place by the 0ring 34, before the nozzle is entered into the sleeve member.
Thus there is provided means for mounting a nozzle in a mineral cutter pick box, a replaceable nozzle element being capable of being replaced from the rear of the pick box very easily and in a minimum of time.
The fact that the nozzle element can be replaced from the rear of the pick box is very important because it is highly unlikely that the means whereby the nozzle can be removed, that is to say the screwdriver slot at the rear end of the nozzle, will be damaged in service or become blocked by coal dust. Similarly, the fact that the sleeve member 17 is inserted from the rear of the pick box ensures that it can always very easily be replaced if necessary by a new sleeve member.
Referring now to Figure 5, the nozzle assembly there illustrated is basically similar to that previously described and again includes a sleeve member, generally indicated 17, a cylindrical filter element 18 and a replaceable nozzle 19, the filter element in this case being shown to have already been fitted on the nozzle for insertion in the sleeve.
The main modification has been in the manufacture of the replaceable nozzle which, as shown, has been made in two main parts, that is to say an elongate portion 33 and a nose portion 35 which is screwthreaded thereto. The nose portion 35 is provided with the relatively small exit passage 50 through which water can pass from the interior of the nozzle in the form of a spray or jet.
An axial bore 49 of the elongate portion 33 being a blind bore, it has not been necessary to plug it as in the previously described embodiment. Since the rear end of the elongate portion is now solid, a single pin 42 extends through it for the opposite ends of said pin to be received in the undercut slots 44 of the sleeve member.
A pair of holes 54 extend tangentially through the wall of the elongate portion 33 to impart a swirling motion to water entering the nozzle and being expelled through the exit passage 50. In chain-dotted lines in Figure 5 there is shown to be located a swirl increasing member, generally indicated 47, within the bore of the replaceable nozzle, this being a headed pin the head of which is provided with a plurality of helical grooves at its periphery. (A swirl increasing member such as this may or may not be required, depending on the water pressure available and on the characteristics of the spray or jet required for the particular working conditions).
Various other modifications may be made. For example, the head portion of the replaceable nozzle may be adapted in such a way that the nozzle can be mounted on the end of a tool which can be used for extracting and replacing such nozzles. (The aperture in the head end of the nozzle shown in
Figure 3 could be of hexagonal shape to be mounted on a hexagon ended tool, the latter possibly having a spring loaded ball in a side wall to provide a threshold of resistance against its extraction from a nozzle with which it has been engaged). On the other hand the nozzle may be provided with an integral handle part, possibly in the form of a wing nut element at the rear of the nozzle. There may be a selection of different nozzles provided with varying sizes of exit and entry passages giving either required spray forms or varying intensities of jet.
Claims (11)
1. A mineral cutter pick box having a nozzle receiving bore to which fluid under pressure can be ducted, the bore being provided with a sleeve member in which a replaceable nozzle can be slidably received from the rear of the pick box.
2. A mineral cutter pick box according to claim 1, in which the replaceable nozzle is retained in position in the sleeve member by means of a quick release fitment such as a bayonet type fitment.
3. A mineral cutter pick box according to either one of the preceding claims, in which a cylindrical filter element is located on the replaceable nozzle to be renewable with said nozzle.
4. A mineral cutter pick box according to any one of the preceding claims, in which the sleeve member has a screwthreaded portion engaging a screwthreaded outer portion of the bore of the pick box.
5. A mineral cutter pick box according to any one of the preceding claims, in which the replaceable nozzle has an elongate portion a nose part of which protrudes from the sleeve member when the nozzle has been entered into it, and at its end remote from the nose part said nozzle has a head portion which is received in a plain outer portion of the bore of the sleeve and retained therein by a bayonet type fitment, that is to say by a pair of oppositely projecting pins which are received in undercut slots in the sleeve member to provide an "insert and twist" connection.
6. A mineral cutter pick box according to claim 5, in which at least one rubber O-ring located on the nozzle beneath the head portion has the dual function of sealing the assembly against the leakage of water around said head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
7. A replaceable nozzle arrangement for a mineral cutter pick box according to any one of the preceding claims, the nozzle arrangement including a sleeve member having a screwthreaded portion for engaging a screwthreaded portion of the bore of the pick box, and a replaceable nozzle a nose part of an elongate portion of which protrudes from the sleeve member when said nozzle has been entered into it, said nozzle having, at an end remote from said nose part, a head portion which can be received in a plain outer portion of the bore of the sleeve and retained therein by a bayonet type fitment, that is to say by a pair of oppositely projecting pins which are received in undercut slots in the sleeve member to provide an "insert and twist" connection.
8. A replaceable nozzle arrangement according to claim 7, in which the replaceable nozzle has at least one rubber O-ring located beneath its head portion to perform the dual function of sealing the assembly against the leakage of water around the head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
9. A replaceable nozzle arrangement according to claim 8, in which a cylindrical filter element is located on the nozzle to be renewable therewith.
10. A replaceable nozzle arrangement for a mineral cutter pick box or the like, the nozzle arrangement being constructed, arranged and adapted to be fitted in position substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
11. A rotary mineral cutting head, provided with an array of mineral cutter tool holders as claimed in any one of claims 1 to 5.
11. A mineral cutter pick box constructed arranged and provided with a replaceable nozzle, substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
Amendments to the claims
have been filed as follows 1. A mineral cutter tool holder having a socket opening for the reception of a pick shank and a nozzle receiving bore opening from the rearward direction of the holder and to which fluid under pressure can be ducted, the bore being provided with a sleeve member in which a replaceable nozzle can be slidably received from the rearward direction of the tool holder and retained in position in the sleeve member by means of a quick release fitment.
2. A mineral cutter tool holder according to claim 1, in which a cylindrical filter element is located on the replaceable nozzle to be renewable with said nozzle.
3. A mineral cutter tool holder according to either one of the preceding claims, in which the sleeve member has a screwthreaded portion engaging a screwthreaded outer portion of the bore of the pick box.
4. A mineral cutter tool holder according to any one of the preceding claims, in which the replaceable nozzle has an elongate portion a nose part of which protrudes from the sleeve member when the nozzle has been entered into it, and at its end remote from the nose part said nozzle has a head portion which is received in an outer portion of the bore of the sleeve and retained therein by a bayonet type fitment.
5. A mineral cutter tool holder according to claim 4, in which at least one rubber O-ring located on the nozzle beneath the head portion has the dual function of sealing the assembly against the leakage of fluid around said head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
6. A replaceable nozzle arrangement for a mineral cutter tool holder according to any one of the preceding claims, the nozzle arrangement including a sleeve member with a portion having fluid tight engagement in a portion of the bore of the tool holder and a replaceable nozzle a nose part of an elongate portion of which protrudes from the sleeve member when said nozzle has been entered into it, said nozzle having, at an end remote from said nose part, a head portion which can be received in an outer portion of the bore of said sleeve and retained therein by a bayonet type fitment.
7. A replaceable nozzle arrangement according to claim 6, in which the replaceable nozzle has at least one rubber O-ring located beneath its head portion to perform the dual function of sealing the assembly against the leakage of fluid around the head portion and of producing a certain amount of resilience to lock the elements of the bayonet type fitment in the assembled position.
8. A replaceable nozzle arrangement according to claim 7, in which a cylindrical filter element is located on the nozzle to be renewable therewith.
9. A replaceable nozzle arrangement for a mineral cutter tool holder or the like, the nozzle arrangement being constructed, arranged and adapted to be fitted in position substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
10. A mineral cutter tool holder constructed arranged and provided with a replaceable nozzle, substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909017070A GB9017070D0 (en) | 1990-08-03 | 1990-08-03 | Mineral cutter pick boxes |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9114687D0 GB9114687D0 (en) | 1991-08-28 |
| GB2246588A true GB2246588A (en) | 1992-02-05 |
| GB2246588B GB2246588B (en) | 1994-08-31 |
Family
ID=10680130
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909017070A Pending GB9017070D0 (en) | 1990-08-03 | 1990-08-03 | Mineral cutter pick boxes |
| GB9114687A Expired - Fee Related GB2246588B (en) | 1990-08-03 | 1991-07-08 | Nozzle arrangements for mineral cutter pick boxes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909017070A Pending GB9017070D0 (en) | 1990-08-03 | 1990-08-03 | Mineral cutter pick boxes |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9017070D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587991A2 (en) * | 1992-09-14 | 1994-03-23 | KRUMMENAUER GmbH & CO. KG | Pickholder for shears drum or cutting head |
| GB2271792A (en) * | 1992-09-29 | 1994-04-27 | Minnovation Ltd | Spray nozzle for mining |
| GB2471931A (en) * | 2009-07-13 | 2011-01-19 | Minnovation Ltd | Rock pick water spray assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117275A (en) * | 1982-03-26 | 1983-10-12 | Hayden Nilos Conflow Ltd | Liquid spray head |
| EP0253802A1 (en) * | 1986-07-17 | 1988-01-20 | VOEST-ALPINE Aktiengesellschaft | Device for spraying cooling fluid from nozzles on a cutter head |
| GB2239822A (en) * | 1990-01-16 | 1991-07-17 | Minnovation Ltd | Water spray unit for mining |
-
1990
- 1990-08-03 GB GB909017070A patent/GB9017070D0/en active Pending
-
1991
- 1991-07-08 GB GB9114687A patent/GB2246588B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117275A (en) * | 1982-03-26 | 1983-10-12 | Hayden Nilos Conflow Ltd | Liquid spray head |
| EP0253802A1 (en) * | 1986-07-17 | 1988-01-20 | VOEST-ALPINE Aktiengesellschaft | Device for spraying cooling fluid from nozzles on a cutter head |
| GB2239822A (en) * | 1990-01-16 | 1991-07-17 | Minnovation Ltd | Water spray unit for mining |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587991A2 (en) * | 1992-09-14 | 1994-03-23 | KRUMMENAUER GmbH & CO. KG | Pickholder for shears drum or cutting head |
| EP0587991A3 (en) * | 1992-09-14 | 1994-03-30 | KRUMMENAUER GmbH & CO. KG | Pickholder for shears drum or cutting head |
| GB2271792A (en) * | 1992-09-29 | 1994-04-27 | Minnovation Ltd | Spray nozzle for mining |
| US5378048A (en) * | 1992-09-29 | 1995-01-03 | Minnovation Limited | Spray nozzle for mining |
| GB2271792B (en) * | 1992-09-29 | 1996-07-10 | Minnovation Ltd | Spray nozzle for mining |
| GB2471931A (en) * | 2009-07-13 | 2011-01-19 | Minnovation Ltd | Rock pick water spray assembly |
| GB2471931B (en) * | 2009-07-13 | 2011-07-06 | Minnovation Ltd | Water spray assembly etc |
| AU2010202820B2 (en) * | 2009-07-13 | 2011-08-25 | Minnovation Limited | Water Spray Assembly |
| US8579380B2 (en) | 2009-07-13 | 2013-11-12 | Minnovation Limited | Water spray assembly etc |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2246588B (en) | 1994-08-31 |
| GB9114687D0 (en) | 1991-08-28 |
| GB9017070D0 (en) | 1990-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960708 |