WO2020247987A1 - Buse destinée à être utilisée lors de l'introduction d'un adhésif à constituants multiples dans une installation d'ancre pour roche - Google Patents

Buse destinée à être utilisée lors de l'introduction d'un adhésif à constituants multiples dans une installation d'ancre pour roche Download PDF

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Publication number
WO2020247987A1
WO2020247987A1 PCT/ZA2020/050028 ZA2020050028W WO2020247987A1 WO 2020247987 A1 WO2020247987 A1 WO 2020247987A1 ZA 2020050028 W ZA2020050028 W ZA 2020050028W WO 2020247987 A1 WO2020247987 A1 WO 2020247987A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin
coupling member
member according
delivery coupling
channel
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.)
Ceased
Application number
PCT/ZA2020/050028
Other languages
English (en)
Inventor
Paolo Ettore Pastorino
Marco DELPORT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Epiroc Holdings South Africa Pty Ltd
Original Assignee
Epiroc Holdings South Africa Pty Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Epiroc Holdings South Africa Pty Ltd filed Critical Epiroc Holdings South Africa Pty Ltd
Publication of WO2020247987A1 publication Critical patent/WO2020247987A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole

Definitions

  • NOZZLE FOR USE IN INTRODUCING A MULTI-COMPONENT ADHESIVE INTO A
  • the invention relates to a nozzle for use in introducing a multi-component adhesive into a rock anchor installation.
  • a multi-component adhesive is used. Each component is pumped from an individual sources and brought together to mix at some stage during the introduction of the adhesive into and through a hollow rock anchor. At the point of mixing, the adhesive components will rapidly cure and harden.
  • the invention provides a resin delivery coupling member which includes a hollow body which includes a wall, an axially extending passage circumscribed by the wall that opens at a first end and an opposed second end, a circumferential resin distributing channel within the passage, a resin conduit in the wall which opens into the channel and at least one inlet port opening the resin conduit to an exterior of the body, wherein the passage is adapted to receive, from a first end, a trailing part of a rock anchor assembly installation which carries a docking element and to engage with the docking element in a position in which an inlet to the docking element is in sealingly fluid communication with the channel.
  • the resin coupling member may be a single-use or sacrificial component, made from a suitable plastics or composite material.
  • the member may include a static mixer which is contained within the conduit.
  • the static mixer may be replaceable, wherein the wall may be adapted with a slot to receive the static mixer and wherein the static mixer may be adapted for removal from the conduit via the slot, when a replacement is needed.
  • the body may be formed with a plurality of inlet ports, each port adapted to receive a respective pre-mixed component of a resin system.
  • Each port may be adapted in a poke-yoke manner to allow engagement only to the resin component delivery hose which carries the correct component of the resin system.
  • the circumferential distributing channel may be formed on an inner wall surface of the channel.
  • the resin coupling member may be reusable, made from a suitable metal.
  • the resin coupling member may include a removable annular element which is adapted with the circumferential distributing channel.
  • the removable annular element may be made of suitable flexible material. In one embodiment, the material may be non-stick to prevent post-mixed resin from sticking to the channel. In another, the removable annular element may be tubular, adapted with an air inlet to allow for inflation of the element.
  • the body may include an air passage formed through the wall which communicates with the air inlet of the removable annular element.
  • the removable annular element may be made of a rigid material, for example a suitable rigid plastics material.
  • the removable annular element may include a helical partitioning wall which adapts the circumscribing distributing channel to a helical distribution channel.
  • the removable annular element may include may include a static mixer in at least a part of the helical distribution channel.
  • the body may be formed with a plurality of inlet ports, each port adapted to receive a respective pre-mixed component of a resin system.
  • Each port may be adapted in a poke-yoke manner to allow engagement only to the resin component delivery hose which carries the correct component of the resin system.
  • Figure 1 is a view from a back end of a nozzle in accordance with a first embodiment of the invention
  • Figure 2 is a sectioned view of the nozzle through line 2 - 2 on Figure 1 ;
  • Figure 3 is a cross sectional view of the nozzle through line 3 - 3 on Figure 2;
  • Figure 4 is a view in plan of the nozzle of Figure 2;
  • Figure 5 is a side view of a nozzle in accordance with a second embodiment of the invention
  • Figure 6 is a view in plan of a static mixer engageable to the nozzle of Figure 5;
  • Figure 7 is a partially sectioned isometric view of a nozzle in accordance with a third embodiment of the invention.
  • Figure 8 is a longitudinally sectioned exploded view of the nozzle of Figure 7;
  • Figure 9 is a partially sectioned exploded isometric view of the nozzle of Figure 8;
  • Figures 10 and 12 are each longitudinally sectioned views of a nozzle in accordance with a fourth embodiment of the invention;
  • Figures 11 and 13 are each partially sectioned isometric view of the nozzle of Figures 10 and 12 respectively;
  • Figure 14 is a partially sectioned isometric view of a nozzle in accordance with a fifth embodiment of the invention;
  • Figure 15 is a longitudinally sectioned exploded view of the nozzle of Figure 14;
  • Figure 16 is a partially sectioned exploded isometric view of the nozzle of Figure 15;
  • Figure 17 is a longitudinally sectioned exploded view of a nozzle in accordance with a sixth embodiment of the invention.
  • Figure 18 is a longitudinally sectioned view of the nozzle of Figure 17.
  • Figure 18 is a series of longitudinally sectioned views of the nozzle of Figure 17 engaging with a rock anchor assembly.
  • a first embodiment of the invention, a nozzle 10A, is described with reference to Figures 1 to 4.
  • the nozzle 10A includes a body 12 made of a low-cost disposable material such as a suitable rigid plastics material.
  • the body extends, in an axial direction when in use, between a first end 14 and an opposed second end 16.
  • the body is hollow, defining a substantially cylindrical passage 18 which extends between the ends.
  • the body has a diametrically larger mid-section 20 to a forward rock anchor assembly abutting section 22 and to a trailing section 24.
  • a wall 25 of the body diametrically reduces, in a step, to the trailing section.
  • the step provides a rear facing surface 26.
  • a circular distributing channel 30 is formed in an inner surface 28 of the wall 25, facing onto the cylindrical passage 18, a circular distributing channel 30 is formed.
  • a circular or semi-circular conduit 32 is formed within the mid-section between an outer surface 33 of the wall and the channel 30.
  • three inlets respectively designated 34A, 34B, and 34C, are formed through the body from the rear facing wall 26 to open into the conduit 32.
  • the conduit in turn spirals inwardly to join the channel at an outlet end 36.
  • the conduit 32 contains a static mixer 38.
  • Each of the inlets can extend from the rear facing wall 26 as respective projecting inlet ports (only two are shown in Figure 4 for ease of illustration and designated 39A and 39B respectively).
  • Each of the ports is connectable to a resin component delivery hose (not shown).
  • Each port can be adapted, in a poke-yoke manner, with a specifically adapted or shaped boss 40 to allow attachment only to the resin component delivery hose which carries the correct component of the resin system so as to prevent the wrong component from being introduced to the nozzle 10A via the wrong inlet 34.
  • the forward rock anchor abutting section 22 is formed with a plurality of locking formations 41 which are adapted to receive complementary bayonets on a docking element, such as for example a barrel 62, which is engaged to a trailing end of a rock anchor assembly 60 (see Figure 19, which illustrates this engagement with another embodiment of the invention), in twist lock engagement.
  • a docking element such as for example a barrel 62
  • the forward section 22 does not have to be adapted with locking formations. It is also envisaged that the nozzle 10 will be held in a position during pumping of a 5 resin by an applied axial force applied, for example, a rock bolting machine arm. The last embodiment shows this.
  • rock anchor assembly is described in a specification to PCT/ZA2016/000017, which specification is herein incorporated by reference.
  • the passage 18 provides a space through which the trailing end of the rock 10 anchor assembly 60 passes in engagement.
  • the nozzle 10A is attachable to the barrel 62 so that a mixed resin can be delivered through the barrel and into a sleeve 64 (see Figure 19) surrounding a rock anchor 66.
  • the barrel is partially received into the cylindrical passage 18 from the first end 14.
  • the back end of the barrel seats and seals against a sealing surface 42 15 which radially inwardly extends into the passage 18 as a rim (see Figure 3).
  • each locking formation 41 engages with a respective bayonet to lock the barrel to the nozzle.
  • the barrel is positioned such that resin inlets in the barrel are in planar orientation with the circular distribution channel 30.
  • Resin components of a multi-component resin system can be pumped from a respective source, through inlets 34A, 34B and 34C respectively, to mix in the static mixer containing conduit 32 and to empty into the channel 30 from outlet 36.
  • the post-mixed resin now flows into the barrel via its resin inlets. Back-flow of the resin is prevented by the seal provided against the sealing surface 42.
  • FIG. 10B A second embodiment of the invention is described with reference to Figures 5 and 6. For ease of illustration, the inlet ports 39 are not shown.
  • This nozzle, designated 10B is similar in all respects to the nozzle 10A, with the exception that it has a replaceable static mixer, designated 38B. This allows the nozzle to be re-used multiple times by replacing the static mixer when it gets occluded with hardened resin.
  • an arcuate slot 44 is formed into the wall 25 of the nozzle body 12, from an outer surface 33, aligned in the circumferential direction.
  • the arcuate slot opens the outer surface 33 to the conduit 32 within.
  • the static mixer 38B is shaped to complement the slot 44 so that the mixer can be inserted into the slot in a snap lock manner.
  • an arcuate outer rib 46 of the mixer now forms part of the wall 25 of the body 12, once fully inserted, and seats flush with the outer surface 33.
  • a mixer part 47 of the static mixer locates within the conduit 32.
  • Figures 7 to 9 illustrate a third embodiment; nozzle 10C.
  • the nozzle 10C is provided with a replaceable seal 48.
  • the seal is a replaceable, crushable, soft, non-stick sealing element which is removed after each use of the nozzle, and replaced with a new seal.
  • the nozzle 10C does not have multiple inlets like the earlier embodiments. It has a single inlet 34 and associated inlet port 39 which introduces a pre-mixed resin to an interior of the nozzle.
  • the circular distribution channel 30 into which the resin is introduced is not part of the nozzle body 12 itself, but rather part of the seal 48.
  • the circular distribution channel 30 is provided between opposed, spaced circular bands, a back-sealing band and a forward sealing band, respectively designated 50A and 50B. It is against the back-sealing band 50A, structurally analogous to the sealing surface of the earlier embodiments that a back end of the barrel seals in engagement of the nozzle to barrel.
  • the nozzle is provided with a back plate 52 which is complementary in size and shape to fit within the cylindrical passage 18, into the trailing section 24, from the second end 16.
  • the back-plate screws into place with a forward end providing a rim 42 against which the back-sealing band 50A of the seal abuts.
  • the fourth embodiment, designated 10D, is illustrated in Figures 10 to 13.
  • This nozzle 10D has, like the nozzle 10C, a replaceable seal 48.
  • the seal 48 of this embodiment is inflatable, after the passage of resin, to break off any resin stuck to the seal. Once the resin is broken up, it is easy to remove with flushing.
  • the nozzle 10D is provided with a second inlet port 54, diametrically opposed to the resin inlet port 34 and the seal is provided with air inlet passage 55. Air is introduced through this port, into the seal via the passage, to inflate the seal from a deflated configuration as illustrated in Figure 10 and 11 , to an expanded configuration as illustrated in Figures 12 and 13.
  • nozzle 10E has similarities to nozzle 10C in that it includes a replaceable, non-inflatable seal 48. This embodiment is illustrated in Figures 14 to 16. Flowever, the nozzle 10E differs in that it is formed with a helical distributing channel 30, with cross-sections of the helical channel longitudinally separated by a partitioning wall 54 following a helical course on a base wall 57 of the seal. At least a part of the spiral distributing channel contains an integrally formed static mixer 38.
  • the resin components can be introduced separately and simultaneously via inlet ports 39A and 39B (depending upon the resin system or the need to flush with a flushing medium, a third port which is not shown can be provided) into the distributing channel where, following the helical channel, each component will be channelled through the static mixer to be mixed before exiting the channel at an outlet 36 and entering resin inlets of an attached barrel.
  • FIG. 17 A final embodiment, nozzle 10F, is illustrated in Figures 17 and 18.
  • this embodiment has a disposable seal / mixing unit 48.
  • this embodiment differs in that, upon completion of the resin component ingress to a rock anchor assembly 60, the nozzle is removed from engagement with a barrel 62, leaving behind the mixing seal unit which remains engaged with the barrel (see Figure 19).
  • the seal unit 48 engages with the cylindrical passage 18 and is press fitted therein and held behind an inwardly projecting lip 64 circumscribing the passage at the first end 14 so as not to fall out.
  • Such an embodiment is useful in a mechanised system, with no need to flush the sacrificial seal. The remaining seal now provides a visual indication that resin has been introduced into the particular bolt installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un élément d'accouplement de distribution de résine qui comprend un corps creux qui comprend une paroi, un passage s'étendant axialement circonscrit par la paroi qui s'ouvre au niveau d'une première extrémité et d'une seconde extrémité opposée, un canal circonférentiel de distribution de résine à l'intérieur du passage, un conduit en résine dans la paroi qui s'ouvre dans le canal et au moins un orifice d'entrée ouvrant le conduit en résine vers l'extérieur du corps, le passage étant conçu pour recevoir, à partir d'une première extrémité, une partie arrière d'une installation d'assemblage d'ancre pour la roche qui porte un élément d'amarrage et pour venir en prise avec l'élément d'amarrage dans une position dans laquelle une entrée vers l'élément d'amarrage est en communication fluidique étanche avec le canal.
PCT/ZA2020/050028 2019-06-06 2020-06-05 Buse destinée à être utilisée lors de l'introduction d'un adhésif à constituants multiples dans une installation d'ancre pour roche Ceased WO2020247987A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2019/02814 2019-06-06
ZA201902814 2019-06-06

Publications (1)

Publication Number Publication Date
WO2020247987A1 true WO2020247987A1 (fr) 2020-12-10

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PCT/ZA2020/050028 Ceased WO2020247987A1 (fr) 2019-06-06 2020-06-05 Buse destinée à être utilisée lors de l'introduction d'un adhésif à constituants multiples dans une installation d'ancre pour roche

Country Status (1)

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WO (1) WO2020247987A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021232073A1 (fr) * 2020-05-12 2021-11-18 Innovative Mining Products (Pty) Ltd Buse d'entrée de résine en deux parties

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974689A (en) * 1987-11-11 1990-12-04 Oy Tampella Ab Drill hole filling method and apparatus
CA2713194A1 (fr) * 2008-01-25 2009-07-30 Friedr. Ischebeck Gmbh Buse d'injection
WO2011116918A2 (fr) * 2010-03-20 2011-09-29 Karin Henning Procédé pour améliorer ultérieurement la résistance d'un moyen de fixation et rondelle pour injection appropriée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974689A (en) * 1987-11-11 1990-12-04 Oy Tampella Ab Drill hole filling method and apparatus
CA2713194A1 (fr) * 2008-01-25 2009-07-30 Friedr. Ischebeck Gmbh Buse d'injection
WO2011116918A2 (fr) * 2010-03-20 2011-09-29 Karin Henning Procédé pour améliorer ultérieurement la résistance d'un moyen de fixation et rondelle pour injection appropriée

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021232073A1 (fr) * 2020-05-12 2021-11-18 Innovative Mining Products (Pty) Ltd Buse d'entrée de résine en deux parties
EP4150194A1 (fr) * 2020-05-12 2023-03-22 Innovative Mining Products (Pty) Ltd Buse d'entrée de résine en deux parties
US12291969B2 (en) 2020-05-12 2025-05-06 Innovative Mining Products (Pty) Ltd Two-part resin input nozzle

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