EP2663435B1 - Organe d'ajout et élément de boîtier pour un dispositif mélangeur - Google Patents

Organe d'ajout et élément de boîtier pour un dispositif mélangeur Download PDF

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Publication number
EP2663435B1
EP2663435B1 EP12708691.6A EP12708691A EP2663435B1 EP 2663435 B1 EP2663435 B1 EP 2663435B1 EP 12708691 A EP12708691 A EP 12708691A EP 2663435 B1 EP2663435 B1 EP 2663435B1
Authority
EP
European Patent Office
Prior art keywords
sealing
admixture piece
piece
tubular
admixture
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.)
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Application number
EP12708691.6A
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German (de)
English (en)
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EP2663435A1 (fr
Inventor
Adrian Thoma
Stefan Zehnder
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.)
Sika Technology AG
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Sika Technology AG
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
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Priority to EP12708691.6A priority Critical patent/EP2663435B1/fr
Publication of EP2663435A1 publication Critical patent/EP2663435A1/fr
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Publication of EP2663435B1 publication Critical patent/EP2663435B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
    • B28C5/026—Mixing guns or nozzles; Injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31423—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements

Definitions

  • the invention relates to a tubular Beigabe search for inclusion in a mixing device for the controlled metered addition of an additive in a pumpable mixture, in particular in a pumpable hydraulically setting mixture, in particular in a shotcrete composition, wherein the Beigabe mosaic over a Beigabe touch extending through the mixing section for guiding the pumpable Mixture has and in a wall of Beigabe topicss at least one opening into the mixing section opening for introducing the additive is introduced into the mixing section and wherein the Beigabe tone at least one sealing element for producing an at least partially fluid-tight connection between the Beigabe topics and the mixing device is present.
  • Another aspect of the invention includes a set of equipment including a loading piece and a housing member.
  • the invention relates to the use of a Beigabe Industriess for the controlled metered addition of an additive in a pumpable mixture.
  • the shotcrete Before spraying, the shotcrete flows at high speed through a delivery line with attached spray nozzle. Necessary recipe ingredients, such as Water (in the case of dry sprayed concrete), compressed air and additives (for example solidification accelerator) are usually metered in just before the spray nozzle or at a maximum of about 2.5 m in advance.
  • Necessary recipe ingredients such as Water (in the case of dry sprayed concrete), compressed air and additives (for example solidification accelerator) are usually metered in just before the spray nozzle or at a maximum of about 2.5 m in advance.
  • the now ready-to-use shotcrete mixture then shoots under pressure onto the contact point and compresses so strongly that essentially a ready-compacted concrete structure is created immediately. Accordingly, particularly efficient and robust mixing devices are needed for the shotcrete processing.
  • Known mixing devices for shotcrete processing usually consist of a tubular Beigabe search, which is designed as a wear part and is kept interchangeable in a special housing. Lateral inlets on Beigabe search allow the addition of an additive into the conveyed through the tubular Beigabe crop mixture.
  • Beigabe e be used, which differ, for example, in terms of number, size and geometry of the side inlets and / or in view of the cross-sectional geometry of the delivery line.
  • the EP 1 570 908 A1 (Sika Technology AG) discloses in this regard, for example, a shotcrete nozzle for applying wet shotcrete or dry sprayed concrete with an integrated addition piece for adding an admixture.
  • the Beigabe Georgia has a variety of side channels for introducing additives into the shotcrete.
  • the integrated add-on piece of the shotcrete nozzle is intended to be received in a housing with a connection for the supply of additive.
  • In order for the introduction of the additive controlled and evenly through the side channels of Beigabe Congresses is sealed in front of and behind the lateral channels in the housing.
  • in the injection concrete nozzle of EP 1 570 908 provided circumferential annular grooves, which are designed to accommodate O-rings.
  • the area of the loading piece is pushed into a housing with a matching cylindrical opening, the area lying between the O-rings is sealed to form a radial seal.
  • the O-rings used for the sealing are arranged in correspondingly formed grooves in the housing of the mixing device.
  • the object of the present invention is therefore to provide a Beigabe Fantasy associated with the aforementioned technical field, which is easier to handle during installation and removal in or out of a housing and still allows a reliable seal.
  • Another task is to provide a corresponding housing element of a mixing device.
  • the object with regard to the Beigabe conference is achieved by the features of claim 1 according to the invention. Accordingly, the at least one sealing element with respect to a longitudinal axis of the tubular Beigabe candidatess designed as an axial seal.
  • tubular filler means a tubular member having an inlet and an outlet connected by a fluid conducting channel or conduit.
  • the fluid-conducting channel or the delivery line corresponds to the mixing section of the tubular Beigabe Georgias. In the mixing section, mixing of the pumpable mixture with the additive takes place.
  • delivery line and mixing section are used synonymously in the present context.
  • a cross-sectional area of the fluid-conducting channel can be designed to be constant or changing along the delivery line.
  • a shape of the cross-sectional area can be arbitrarily selected according to the intended application, for example, circular, oval and / or polygonal. For fluid dynamic reasons, a circular cross-sectional area is preferred.
  • a circular cross-sectional area is preferred.
  • the term cylindrical pipe piece in the present context includes in particular pipe pieces which have in the region of the lateral surface over protruding sealing elements, flanges and / or tapered pipe sections.
  • An inner diameter, in particular a minimum inner diameter, of the delivery line is preferably at least 25 mm.
  • a maximum value of the inner diameter of the delivery line measures in particular at most about 100 mm.
  • the inner diameter of the conveying line is 32 mm, 38 mm, 50 mm, 60 mm, 65 mm or 85 mm.
  • the Beigabe Georgia can best combine with standardized components, such as delivery lines, delivery hoses and / or shotcrete nozzles.
  • An overall length of the loading piece, measured in the axial direction is advantageously 30-300 mm, more preferably 50-150 mm.
  • the "longitudinal axis of the tubular Beigabests” corresponds in particular to the direction predetermined by the fluid-conducting channel or the conveying line, which corresponds in particular to a conveying direction of the pump to be conveyed in the delivery line pumpable mixture.
  • the expression “axial direction” or in the “axial direction” in the present context stands in particular for the direction defined by the fluid-conducting channel or the delivery line.
  • the longitudinal axis essentially corresponds to the longitudinal central axis and / or the axis of symmetry of the conveying line and / or the tubular Beigabe brainstorms.
  • sealing element in the present context, in particular for a molded plastic element.
  • the sealing element is designed so that by a touching contact pressure on a Sealing surface on a part to be sealed results in a fluid-tight connection.
  • radial seal refers in particular to a seal in which the sealing element, e.g. an O-ring extending substantially radially from a first sealing surface on a first body to a second sealing surface on a second body and sealing a radial clearance.
  • the sealing element e.g. an O-ring extending substantially radially from a first sealing surface on a first body to a second sealing surface on a second body and sealing a radial clearance.
  • a radial seal is therefore pre-pressed substantially during assembly by a force acting in the radial direction in order to achieve the desired sealing effect.
  • axial seal particularly designates a sealing element which extends along a longitudinal axis and seals a gap between two axially spaced sealing surfaces.
  • an axial seal during assembly is in particular pre-pressed by a force acting in the axial direction.
  • the direction of flow of a leak therefore extends in particular in the axial direction, while in the case of an axial seal, depending on the angle of the spaced sealing surfaces relative to the axis, the flow direction has at least one radial component.
  • the inventive Beigabe Dialoge can be used in a simple manner in appropriately trained mixing devices or housing elements and also remove it again.
  • an outer diameter of the inventive Beigabe triplee can be chosen to be much smaller compared to the inner diameter of the receiving opening in the mixing device, so that the Beigabefan with play in the receiving opening insert or remove it. Also, manufacturing tolerances, which are generally much greater in Beigabe shareen plastic than Beigabe conferenceen steel, are largely unproblematic due to the inventive solution.
  • the axial seal according to the invention nevertheless makes it possible to produce a fluid-tight connection between the loading piece and the mixing device or in the receiving opening. For this purpose, it is sufficient, as will be described in more detail below, when the axial seal on Beigabe Industries pressed by a force acting in the axial direction force against a sealing surface is kept fixed in the mixing device. This represents a simple, yet extremely effective method of sealing.
  • the additions according to the invention are particularly advantageous in the metered addition of an additive into a pumpable hydraulically setting mixture, in particular in shotcrete composition.
  • the shotcrete composition may be in particular a wet, dry or dry shotcrete composition.
  • the axial seal is formed as an annular sealing lip, which in particular in a section, preferably continuously, has a wedge-shaped tapered cross-section.
  • a region of a wedge tip of the sealing lip is designed as a sealing edge.
  • a wedge angle of the sealing lip measures 10 ° -80 °, preferably 20 ° -70 °, most preferably 25 ° -35 °.
  • the angle between the two coinciding in the wedge tip wedge surfaces of the sealing lip is understood.
  • Such acute wedge angle have been found to be particularly suitable with regard to optimum sealing effect and stability.
  • wedge angles of less than 10 ° or more than 80 ° are possible.
  • the sealing lip in the region of the wedge tip particularly preferably has a convexly curved edge surface as a sealing edge.
  • the contact surface of the sealing edge on a surface can be further reduced, since the contact surface in this case approaches a support line.
  • the mechanical stability of the sealing lip is improved compared to a sharp-edged wedge tip, since the risk of edge damage, eg due to tearing of the sealing lip in the thin edge region, is reduced.
  • Convex curved edge surfaces are not mandatory.
  • the sealing lip in the region of the wedge tip can, for example, also be formed with sharp edges or with a flattened sealing edge.
  • the axial seal is arranged on an end face of a flange present on the beige piece.
  • the flange acts as a carrier element for the axial seal. This allows in a simple manner an arrangement of the axial seal on Beigabe conference.
  • the flange in the axial direction is flush with the tubular Beigabe contest.
  • the axial seal is arranged, for example, on an end face of the wall of the tubular beige piece and / or on an end face of a step-like taper and / or a radially tapering taper of the tubular beige piece.
  • arranged on the end face of the flange axial seal is at least partially, preferably completely, spaced from the wall of the Beigabe specialistss, so that there is a groove between the axial seal and the wall.
  • the groove also has in particular a concave curved boundary surface. Due to the spacing of the axial seal, the sealing lip can be pressed better against the conditions of the sealing support in the mixing device. In particular, it is possible in this case that the area of the wedge tip when pressed against the sealing support in the mixing device to a limited extent remains movable in the radial direction and can be pressed against the sealing support better.
  • a concavely curved boundary surface of the groove also has the advantage that there are fewer or no edges in the groove area in which material could get stuck. As a result, a possible accumulation of material and the associated risk of clogging is reduced when using the Beigabe Industriess in a mixing device. In addition, grooves configured in this way can be cleaned more easily.
  • the axial seal can also be arranged adjacent to the wall of the beige piece. It is also possible to provide a groove with non-concave curved boundary surface. However, in these cases, the advantages mentioned above are at least partially eliminated.
  • the Beigabe Georgia and / or the axial seal is made of a plastic, particularly preferably a plastic having a hardness of 50 - 120 Shore-A, according to another preferred embodiment. Particularly preferably, the plastic has a hardness of 70-95 Shore-A.
  • plastics made of polyurethane are suitable. Such plastics have a good mechanical stability and have an optimal deformability when applying an axial force, so that a good sealing effect is obtained. This has been demonstrated, in particular, by the use of the admixture under relatively harsh conditions in conjunction with hydraulically setting blends, particularly wet, dry or dry shotcrete compositions.
  • the at least one sealing element and / or the axial seal is materially connected to the beige piece. This ensures optimal positioning and sealing effect. In addition, there is no danger that the sealing element could be lost when installing or removing the Beigabe Industriess.
  • the at least one sealing element and / or the axial seal is an integral part of the Beigabe conferencess.
  • the addition piece is designed as an axial seal in the region of the at least one sealing element.
  • the at least one sealing element and / or the axial seal at least in the region of the at least one sealing element consists in particular of the same material as the beige piece.
  • the Beigabe conference and the at least one sealing element or the axial seal in this case form a cohesively connected unit.
  • the Beigabe conference made at least in the region of at least one sealing element made of a plastic, more preferably a plastic with a Hardness of 50 - 120 Shore-A. Even more advantageous are plastics of hardness 70-95 Shore-A.
  • the addition piece consists of a one-piece cast body and optionally an at least partially embedded reinforcing element.
  • the cast body consists in particular of a plastic, more preferably a plastic having a hardness of 50 to 120 Shore A. Even more advantageous are plastics of hardness 70-95 Shore-A. As a result, particularly stable Beigabegnae can be produced in an economical manner.
  • a Beigabe Georgia of a one-piece cast body can be produced in a single operation without time-consuming post-processing.
  • a possible reinforcing element in particular an annular reinforcing element is advantageously at least partially, in particular completely embedded in the cast body so that it does not come into contact with the media or the pumpable mixture in the mixing section.
  • Such a reinforcing element can be embedded directly in the casting of the cast body in this.
  • Beigabe Tech but also consist of several individual and non-positively and / or positively connected parts.
  • a further sealing element on the beige piece, which is spaced apart from the at least one sealing element in the direction of the longitudinal axis of the tubular Beigabe specialistss.
  • the further sealing element is designed in particular as a further axial seal.
  • the further sealing element is configured as an annular sealing lip, which has a wedge-shaped cross section and is designed as a sealing edge, which in the region of the wedge tip particularly preferably has a convexly curved edge surface as a sealing edge.
  • a wedge angle of the sealing lip the further sealing element advantageously measures specific 10 ° -80 °, preferably 20 ° -70 °, more preferably 25 ° -35 °.
  • the further sealing element is arranged on an end face of a step-like taper and / or a radially tapered taper of the tubular Beigabe Industriess.
  • the axial seal arranged on the end face of the rejuvenating taper is arranged at least partially, preferably completely, spaced from the wall of the insert, so that there is a groove between the axial seal and the wall which advantageously has a concavely curved boundary surface.
  • the second sealing element may be attached to a further projecting flange or on an end face of the wall of the tubular Beigabe Georgias.
  • a differently configured sealing element which for example has no wedge-shaped cross section, such as an O-ring or a flat gasket with a rectangular cross-section.
  • the opening opening into the delivery line can be arranged, for example, between the at least one sealing element and the further sealing element.
  • the region of the opening in this case can be completely sealed in a housing by the two sealing elements, in particular in the form of axial seals.
  • the tubular beige piece preferably has a structural reinforcing element.
  • the reinforcing element is advantageously made of a material with less elasticity than a material of the fluid-conducting channel or the mixing section.
  • the reinforcing element may for example be made of plastic, metal and / or a composite material.
  • the mechanical stability in subareas, in particular in the radial direction, of the tubular Beigabe Georgias can be specifically increased, wherein the necessary axial elasticity is maintained.
  • the reinforcing element is made of a metal, in particular steel.
  • a metal in particular steel.
  • the reinforcing element is designed as an annular and / or hollow cylindrical element, in particular as a metal ring.
  • the reinforcing element can be arranged, for example, in a simple manner in the region of the fluid-conducting channel and thereby has an optimum supporting effect in the radial direction.
  • differently shaped reinforcing elements can also be provided. These may be fibers, grids or braids of fibers, for example. This can also be achieved a reinforcement of the tubular Beigabe Georgias in the radial direction without losing the necessary flexibility in the axial direction.
  • a length of the reinforcing element, in particular of a metal ring, in the axial direction of the loading piece is advantageously 5 to 50%, in particular 10 to 30%, of the total length of the loading piece.
  • a thickness of the reinforcing element, in particular a metal ring is advantageously smaller than the thickness of the wall of the tubular Beigabewins in the region of the reinforcing element. This achieves an optimum reinforcing effect with compact dimensions and the necessary elasticity in the axial direction.
  • the reinforcing element can be completely embedded in the wall of Beigabe Congresss without protruding.
  • the reinforcing element is at least partially, preferably completely, embedded in a wall of the tubular Beigabe Georgias or the fluid-conducting channel.
  • the addition piece can not be radially deformed under normal conditions and thus the function of the sealing lips is maintained over a wide range.
  • the reinforcing element does not protrude in the interior of the tubular Beigabe Georgias. Thus, no protrusions are formed by the reinforcing element, which among other things could affect the flow behavior of the pumpable mixture in the fluid-conducting channel.
  • the reinforcing element is arranged in the region of the fluid-conducting channel or the mixing section. If the Beigabe Georgia about two Has sealing elements, the reinforcing element is advantageously arranged in a region between the two sealing elements. In principle, however, the reinforcing element can also be present in other areas.
  • the housing element of a mixing device for the controlled injection of an additive into a pumpable mixture, in particular a pumpable hydraulically setting mixture, in particular a shotcrete composition.
  • the housing element comprises a base body with a passage opening, wherein the passage opening is designed for the at least partial reception of a loading piece as described above.
  • the housing element is characterized in particular by the fact that at least one sealing support arranged on the housing element (200) is provided for a sealing element of the loading element designed as an axial seal, and means are provided for applying a force acting on the loading element in the axial direction and / or longitudinal direction of the passage opening, so that the axial seal of an at least partially received in the passage opening Beigabe specialistss can be pressed by the means for applying the force against the sealing pad.
  • the housing element also has a connection for feeding the additive into the passage opening.
  • the passage opening of the housing element is in particular at least partially substantially complementary to the inventive Beigabe Georgia formed. Furthermore, the loading piece can be accommodated coaxially in the passage opening of the housing element.
  • the means for applying an axial force to the loading piece can in principle be selected according to the requirements.
  • the person skilled in a number of suitable technical devices are known.
  • This can e.g. be arranged on the base body or housing element toggle mechanism.
  • the present in the housing element and partially projecting out of the opening tubular Beigabe scholar can be embraced in this case, for example, by one or more arranged on the toggle mechanism brackets and pressed in tensioning the toggle mechanism in the axial direction into the opening.
  • bayonet-type connection techniques are also conceivable.
  • the main body preferably has a screw thread in the region of an outside, in particular an external thread.
  • the sealing support in the base body and the Beigabe touch are dimensioned so that the Beigabe seven protrudes from the passage opening of the body out of concern when applied to the sealing pad, so that in particular the protruding from the through hole end of Beigabe,000,000s can be encompassed by the nut.
  • the union nut has a first hollow-cylindrical end with a screw thread extending in the direction of the longitudinal axis, in particular an internal thread.
  • At the other end of the nut is located opposite the first end tapered and circular opening with advantage.
  • a diameter of the tapered opening is advantageously at least as large, preferably larger, than the inner diameter of the conveying line of the tubular Beigabe conferencess and / or at the same time less than a maximum dimension, in particular an outer diameter, of the tubular Beigabe topicss at a front end. This allows the union nut the tubular Beigabe FIFA include frontally and at the same time remains an optimal passage for the mixture to be pumped by the mixing device free.
  • Such a configuration makes it possible in this case to press the present in the housing element and partially protruding from the opening tubular Beigabe conference in a simple and reliable manner by a screw movement of the nut in the opening of the housing member. Thereby, the at least one sealing element or the axial seal of Beigabespas is pressed against the sealing support in the body.
  • the union nut may include a pipe, a hose line and / or a shotcrete nozzle with a fastening flange arranged on the input side and connect in a fluid-tight manner to the mixing device. Due to the screw through the union nut pipes, hoses and / or shotcrete nozzles can be used with different flange thickness, the thickness of the mounting flanges can be compensated in many areas.
  • the at least one sealing support of the base body is designed as a truncated cone lateral surface and / or a conically tapered surface.
  • the truncated cone lateral surface and / or the conically tapered surface are in particular rotationally symmetrical with respect to the longitudinal axis of the main body.
  • An opening angle of the truncated cone lateral surface and / or the conically tapered surface advantageously measures 70-270 ° or a half opening angle, measured to the longitudinal axis or the axis of the conveying direction, of 35-135 °.
  • a truncated cone lateral surface which is designed as an outer conical surface, advantageously has an opening angle of 180-220 ° or a half opening angle of 90-110 ° (from the longitudinal axis or the axis of the Conveying direction measured).
  • a truncated cone lateral surface, which is designed as an inner cone surface has in particular an opening angle of 80-100 ° or a half opening angle of 40-50 ° (measured from the longitudinal axis or the axis of the conveying direction). If both an outer conical surface and an inner conical surface are present, a ratio of the opening angle of the outer conical surface to an opening angle of the inner conical surface is advantageously in the range from 1.8 to 2.75. As has been shown this facilitates the centering of the axial seal of Beigabe Georgias in the body, which improves the overall tightness.
  • a flat sealing surface can also be provided, which is present in particular in a plane perpendicular to an intended insertion direction of the tubular attachment piece and / or perpendicular to the longitudinal axis of the inserted piece inserted into the base body.
  • a further sealing support arranged in the base body for a further sealing element present on the beige piece and designed as an axial seal.
  • Corresponding Beigabe fantasy with at least two sealing elements in the form of axial seals can be so easily inserted into the receptacle or removed from it, at the same time a high density is achieved.
  • a present on Beigabe-50 area of the opening for introducing the additive into the delivery line can be sealed on both sides in the housing element. This is with regard to a controlled metered addition of an additive into a pumpable mixture, in particular in a pumpable hydraulically setting mixture, in particular in a wet, dry or dry shotcrete composition, an advantage.
  • a radial seal integrated in the main body may also be provided, e.g. an O-ring. In this case, however, the handling may be difficult.
  • a minimum diameter of the at least one sealing pad is greater than a minimum diameter of the further sealing pad. This allows the inclusion of a Beigabe touchs described above with two different sized axial seals. For differently shaped Beigabeggie the sealing pads but may for example also have approximately the same outer diameter.
  • the at least one sealing support is preferably designed as an inner cone surface and / or the further sealing support is designed as an outer conical surface. If the Beigabe Georgia present in the housing element between the two axial seals from the outside pressurized, acts on the axial seals radially outwardly and / or inwardly directed force. Due to the configuration of the two sealing surfaces, an associated deflection of the axial seals in the radial direction is effectively reduced or the tightness of the axial seals is additionally increased due to the additional contact forces in the radial direction.
  • metals, plastics or composite materials with or without fiber reinforcement come into question as material for the housing element and / or the base body.
  • the housing element is particularly advantageous from a plastic, in particular polyoxymethylene copolymer, hereinafter called POM-C.
  • POM-C polyoxymethylene copolymer
  • the weight of the housing member can be kept low and at the same time is a high ensures mechanical and chemical stability, which is particularly advantageous in connection with pumpable hydraulically setting mixtures, in particular with wet, moist or dry shotcrete compositions.
  • Housing elements made of plastic can be compared to metals or composites also relatively inexpensive to produce, for example by casting.
  • both the base body and the nut each in one piece of a plastic, in particular POM-C made.
  • the above-described tubular Beigabe search is advantageously provided together with the housing element also described above as a set of equipment.
  • a distance between the two sealing elements on Beigaberace-50 in the axial direction corresponds in particular substantially a distance of the two sealing pads on the housing element.
  • the passage opening in the housing element is in this case designed in particular such that the loading element can be accommodated at least partially in the passage opening.
  • Beigabe search 100 has a hollow cylindrical body 102 with a along the longitudinal axis 101.2 extending circular cylindrical passage 101, which extends completely through the body 102 and serves as a mixing section or conveying line for a pumpable mixture.
  • first sealing lip 110 is arranged as a sealing element.
  • the first sealing lip 110 is designed as an axial seal and has a wedge-shaped tapering cross section in a direction away from the end face of the flange 105.
  • a wedge angle 111.1 of the first sealing lip 110 is for example about 30 °. In the region of an outer peripheral surface, the sealing lip merges seamlessly into the outer lateral surface of the flange 105.
  • a region of the free end 111 of the first sealing lip 110 or a region of the wedge tip is convexly curved and forms a sealing edge of the sealing lip 110.
  • the sealing lip 110 is also spaced from the wall of the base body 102 in the radial direction, so that between the wall of the base body 102 and the sealing lip 110 is a first circumferential groove 112 having a concave curved boundary surface.
  • the tubular Beigabe Georgia 100 has a step-like taper or a radially tapering taper, on which a further sealing element in the form of another circumferential sealing lip 120 is arranged.
  • the second sealing lip 120 is designed as an axial seal, has a wedge-shaped tapered cross section and is rotationally symmetrical to the longitudinal axis 101.2.
  • the further sealing lip 120 is substantially the same design and oriented as the first sealing lip 110. Accordingly, the second sealing lip 120 has a wedge angle 121.1 of e.g. about 30 ° and a portion of the free end 121 of the further sealing lip 120 forms a convexly curved sealing edge.
  • the further sealing lip 120 is further spaced apart in the radial direction from the wall of the base body 102, so that between the wall of the base body 102 and the further sealing lip 120 there is a further circumferential groove 121 with a concavely curved boundary surface.
  • the further sealing lip 120 merges seamlessly into the wall of the hollow cylindrical main body 102.
  • openings 103 introduced into the wall of the hollow cylindrical body 102. These serve to introduce an additive into the circular cylindrical passage 101 provided as a mixing section. It is also possible, for example, to provide 4 or 8 openings, which may also have an angle to the longitudinal axis.
  • the outer diameter 120.1 of the further sealing element is about 13% smaller than the outer diameter of the first sealing element.
  • An inner diameter 101. 1 of the loading piece 100 is, for example, approximately 60 mm.
  • the tubular Beigabe Trading 100 is in particular made completely in one piece from a plastic.
  • a plastic for example, polyurethane with a hardness of about 50-120 Shore A, for example 75 Shore A or 90 Shore A, is suitable as the plastic.
  • Fig. 3 shows a longitudinal section through a housing member 200 which comprises a tubular body 225 with a central passage opening 201.
  • the passage opening 201 extends from a first end 230 to a second end 240 along a longitudinal center axis 201.1 completely through the base body 225 therethrough.
  • the passage opening 201 is subdivided into a plurality of regions with different inner diameters, wherein all regions are configured rotationally symmetrical with respect to the longitudinal center axis 201.1.
  • the passage opening 201 tapers conically.
  • the portion beginning at the first end 230 of the passage opening 201 is designed as a truncated cone surface or inner cone surface 210.
  • the inner cone surface 210 serves as a sealing support for an axial seal of a beige added in the body 225 Beigabe conferencess. This is for example a Beigabe brainstorm 100 as in the Fig. 1 - 2 shown.
  • An opening angle of the inner cone surface 210 measures, for example, about 90 ° (measured 45 ° from the longitudinal center axis).
  • the inner cone surface 210 is adjoined by a first hollow cylindrical section 202 with a constant inner diameter, which merges via a conical intermediate region 203 into a second hollow cylindrical section 204 with an enlarged inner diameter.
  • the second hollow cylindrical section 204 then leads into a third hollow cylindrical section 205.
  • the transition between the second and the third hollow cylindrical section is designed stepwise as a truncated cone lateral surface or outer conical surface 220, which serves as a further sealing support for a further axial seal of a beige added in the main body 225.
  • An opening angle of the outer cone surface 220 measures e.g. about 200 ° (measured 100 ° from the longitudinal axis).
  • the third hollow-cylindrical section 205 finally merges into a diameter-widened connection region 206.
  • the terminal area 206 is e.g. designed for connecting a delivery pipe or a delivery hose.
  • two radial bores 213a, 213b also open out of diametrically opposite directions as supply lines for introducing an additive into the passage opening 201.
  • the one bore 213a is closed, for example, by a closure cap 402, while at the other bore 213b is closed by a curved tubing 400 a hose or pipe 401 is connected.
  • both holes 213a, 213b can also be equipped with a connecting piece 400.
  • An inner diameter 202. 1 of the first hollow-cylindrical section 202 which corresponds to a minimum diameter of the inner cone surface 210, is larger than an inner diameter 205. 1 of the third hollow-cylindrical section 205, which corresponds to the minimum diameter of the outer conical surface 220.
  • the minimum diameter of the further sealing support is thus smaller than the minimum diameter of the first sealing support (inner conical surface 210) in the housing element 200.
  • an external thread 250 is furthermore introduced into the base body 225.
  • a union nut 300 is screwed.
  • the union nut 300 has a first hollow-cylindrical end with an internal thread 301 extending in the direction of the longitudinal axis. At the other end of the union nut, there is a circular-cylindrical opening 302 tapered step-like with respect to the first end. As a result, in the interior of the union nut 300 there is a disk-shaped end face 303 adjoining the opening 302, which is provided as a contact surface for a beige piece and / or further tubular elements. A diameter 302. 1 of the opening is smaller than a diameter of the internal thread 301.
  • the union nut 300 By a screwing movement of the union nut 300 on the external thread 250 of the base body 225, the union nut can be displaced in the axial direction or in the direction of the longitudinal axis 201.1 relative to the base body 225.
  • a disposed behind the opening 302 of the union nut 300 and abutting the end face 303 element, for example, a Beigabe brainstorm 100 as shown in the Fig. 1 - 2 can thus be pressed against the housing element.
  • the union nut can be used as a means for applying a force acting in the axial direction or in the direction of the longitudinal axis 201.1.
  • the main body 225 and the union nut 300 are advantageously each made in one piece from plastic.
  • a plastic for example POM-C is suitable.
  • the loading piece 100 and the housing element 200 together form a set of equipment.
  • a distance of the two sealing edges 111, 121 on the Beigabe conference 100 corresponds to a distance between the two sealing pads 210, 220 on the housing element 200.
  • An outer diameter of the Beigabe conferences 100 between the two sealing lips 110, 120 is also less than the inner diameter in the first two hollow cylindrical sections 202, 204 and the conical intermediate area 203. As a result, the Beigabe Georgia 100 can be received in the radial direction with play in the passage opening 201.
  • Fig. 4 shows an assembly comprising the housing member 200 from Fig. 3 with the enclosed therewith Beigabe Sharing 100 from the Fig. 1 - 2 in a longitudinal section.
  • This arrangement corresponds to a mixing device for the controlled metered addition of an additive into a pumpable hydraulically setting mixture, in particular into a wet, dry or dry shotcrete composition.
  • the first sealing lip 110 of the loading piece 100 lies with its free end 111 or the sealing edge on the inner cone surface 210 of the base body 225.
  • the further sealing lip 120 of the add-on piece 100 lies with its free end 121 or the sealing edge on the outer conical surface 220 of the base body 225.
  • the region of the flange 105 protrudes in the axial direction beyond the first end 230 of the base body 225 into the inner region of the union nut 300.
  • an inlet-side flange 601 of a shotcrete nozzle 600 is additionally arranged between the flange-side end of the adduct 100 and the end surface 303 of the union nut 300 .
  • the outer diameter of the inlet-side flange 601 of the Spritzbetondüse 600 is greater than the diameter of the opening 302 of the union nut 300.
  • an open end of a delivery tube or delivery tube 500 equipped with a coupling device is also connected in a manner known per se.
  • a pumpable mixture for example a shotcrete composition
  • An inner diameter of the delivery tube or delivery tube 500 substantially corresponds to the inner diameter 101. 1 of the tubular attachment piece 100.
  • Fig. 5 shows a further inventive tubular Beigabe search 800 in cross section. This is essentially identical to the Beigabe conference 100 of the Fig. 1 and 2 However, in a region between the two sealing elements 810, 820 additionally has a reinforcing element 850.
  • the reinforcing element 850 is formed as a steel ring and completely embedded in the wall of the tubular Beigabespas 800 or poured.
  • a length of the reinforcing member in the axial direction measures about 17% of the total length of the beige body 800 in the axial direction.
  • the assembly of the arrangement Fig. 4 is possible in a simple way.
  • the union nut 300 removed from the base body 225 is pushed over the shotcrete nozzle 600 until the inlet-side flange 601 abuts the disk-shaped end face 303 of the union nut.
  • the tubular attachment piece 100 is inserted from the first end 230 into the passage opening 201 of the housing element 200 until the two sealing lips 110, 120 rest on the respective sealing supports 210, 220 in the base body 225.
  • the union nut 300 is screwed with the shotcrete nozzle 600 on the external thread 250 of the body 225 and tightened.
  • the two sealing lips 110, 120 are automatically pressed against the associated sealing pads 210, 220.
  • the delivery pipe or hose 500 may be connected at any time regardless of the other components.
  • the union nut 300 is completely dissolved and removed from the body 225. Thereafter, the Beigabgins can be taken at the flange end and pulled out without appreciable force from the passage opening.
  • the housing element 200 (FIG. Fig. 3 ) from POM-C with an adjunct 100 ( Fig. 1 - 2 ) made of polyurethane with a hardness of approx. 90 Shore-A.
  • the connection region 206 and the opening 302 of the union nut 300 were each sealed fluid-tight with a blind flange.
  • pressurized water was supplied via the connecting piece 400 and the water pressure was increased continuously.
  • compressive strengths of the arrangement of up to 50 - 60 bar have been found before by expansion of the material of the nut 300, a pressure relief has taken place.
  • Neither the union nut 300 nor the connection area 206 were damaged, so that the experiments were repeatable several times. This is particularly advantageous in terms of occupational safety, since there is no risk that the housing element or the Beigabe Sharing breaks up and is torn apart, which could cause personal injury.
  • the bores 103 were sealed and one of the blind flanges was bored to the opening 101.
  • leakage of the sealing system at approx. 10 bar could be detected by the exit of water through the bore in the blind flange.
  • the sealing system is tight up to a pressure of about 10 bar.
  • the supporting pieces 100 ( Fig. 1 - 2 ) and 800 ( Fig. 5 ) made of polyurethane with a hardness of 75 and 90 Shore A and the housing elements 200 ( Fig. 3 ) of POM-C have also been tested in conventional sprayed concrete applicator arrangements under various conditions.
  • the devices according to the invention are at least as well suited for the application of shotcrete as conventional systems, but the handling in cleaning and replacing the loading piece is significantly better.
  • openings 103 it is also possible, in addition to or instead of the openings 103, to provide further or otherwise formed openings, for example slots, in the wall of the beige piece.
  • housing member 200 off Fig. 3
  • the housing element 200 can have additional or differently configured feed openings.
  • the mixing section 101 of the loading piece 100 and / or the passage opening 201 of the housing element 200 may also have a tapered cross-section. This can be expedient, for example, for realizing a current transformer.
  • the Beigabe search 100 the main body 225 and / or the nut 300 partially or completely made of a material other than plastic, for example made of steel and / or aluminum.
  • Beigabe98s 100 can in the equipment set, the arrangement of Fig. 4 or in the assembly / disassembly process and the tubular Beigabe topics 800 Fig. 5 be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Gasket Seals (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Coating Apparatus (AREA)
  • Accessories For Mixers (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Closures For Containers (AREA)

Claims (12)

  1. Organe d'ajout tubulaire (100) à monter dans un dispositif mélangeur en vue du dosage contrôlé d'une substance d'addition dans un mélange à pomper, en particulier dans un mélange à prise hydraulique à pomper, particulièrement dans une composition de béton à projeter, dans lequel l'organe d'ajout (100) dispose d'une zone de mélange (101) s'étendant à travers l'organe d'ajout (100) pour le guidage du mélange à pomper et au moins une ouverture (103) débouchant dans la zone de mélange est pratiquée dans une paroi de l'organe d'ajout (100) pour introduire la substance d'addition dans la zone de mélange (101) et dans lequel il se trouve sur l'organe d'ajout (100) au moins un élément d'étanchéité (110) pour la réalisation d'un assemblage au moins partiellement étanche au fluide entre l'organe d'ajout (100) et le dispositif mélangeur, dans lequel ledit au moins un élément d'étanchéité (110) est conçu comme joint axial par rapport à un axe longitudinal (101.2) de l'organe d'ajout tubulaire (100), dans lequel le joint axial (110) est réalisé sous la forme d'une lèvre d'étanchéité annulaire, caractérisé en ce que le joint axial (110) est disposé sur un côté frontal d'une bride (105) formée sur l'organe d'ajout (100) et est disposé au moins partiellement, de préférence entièrement à distance de la paroi (102) de l'organe d'ajout (100), de telle manière qu'il se trouve une rainure (112) entre le joint axial (110) et la paroi, dans lequel la rainure (112) présente en particulier une face de limitation à courbure concave.
  2. Organe d'ajout tubulaire selon la revendication 1, caractérisé en ce que la lèvre d'étanchéité présente au moins dans une partie, de préférence en continu, une section transversale croissante en forme de coin, dans lequel notamment une région d'une pointe de coin (111) de la lèvre d'étanchéité est conçue comme arête d'étanchéité.
  3. Organe d'ajout tubulaire selon la revendication 2, caractérisé en ce qu'un angle de coin (111.1) de la lèvre d'étanchéité mesure 10° - 80°, de préférence 20° - 70°, et de préférence encore 25° - 35°.
  4. Organe d'ajout tubulaire selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il se trouve au moins un autre élément d'étanchéité (120), qui est espacé dudit au moins un élément d'étanchéité (110) dans la direction de l'axe longitudinal (101.2) de l'organe d'ajout tubulaire (110) et dans lequel en particulier l'autre élément d'étanchéité est également conçu comme joint axial.
  5. Organe d'ajout tubulaire selon la revendication 4, caractérisé en ce qu'une extension maximale (120.1) de l'autre élément d'étanchéité (120) dans une direction perpendiculaire à l'axe longitudinal (101.2) de l'organe d'ajout tubulaire (100) est plus petite qu'une extension maximale (102.1) dudit au moins un élément d'étanchéité (110).
  6. Organe d'ajout tubulaire selon l'une quelconque des revendications précédentes, caractérisé en ce que l'organe d'ajout (100) se compose d'un corps coulé d'une pièce et en option d'un élément de renforcement au moins en partie noyé dans celui-ci, dans lequel le corps coulé se compose en particulier d'une matière plastique, de préférence encore d'une matière plastique ayant une dureté de 50 - 120 Shore A.
  7. Ensemble d'appareil, comprenant un organe d'ajout tubulaire (100) selon l'une quelconque des revendications précédentes et un élément de boîtier (200) d'un dispositif mélangeur pour l'injection contrôlée d'une substance d'addition dans un mélange à pomper, en particulier un mélange à prise hydraulique à pomper, et particulièrement une composition de béton à projeter, dans lequel l'élément de boîtier (200) comprend un corps de base (225) avec une ouverture de passage (201), et l'ouverture de passage (201) est conçue pour le logement au moins partiel d'un organe d'ajout (100) selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il se trouve un appui d'étanchéité (210) disposé sur l'élément de boîtier (200) pour un élément d'étanchéité de l'organe d'ajout (100) conçu comme joint axial, et en ce qu'il se trouve des moyens (300) pour appliquer une force agissant en direction axiale et/ou en direction longitudinale de l'ouverture de passage à l'organe d'ajout, de telle manière que le joint axial d'un organe d'ajout (100) logé au moins en partie dans l'ouverture de passage (201) puisse être appliqué contre l'appui d'étanchéité par les moyens (300) pour appliquer la force.
  8. Ensemble d'appareil selon la revendication 7, caractérisé en ce qu'il se trouve comme moyens (300) pour appliquer une force à l'organe d'ajout un écrou d'accouplement pouvant se visser sur le corps de base.
  9. Ensemble d'appareil selon une des revendications 7 à 8, caractérisé en ce qu'il se trouve en outre un autre appui d'étanchéité (220) disposé dans le corps de base (225) pour un autre élément d'étanchéité présent sur l'organe d'ajout (100) et conçu comme joint axial.
  10. Ensemble d'appareil selon une des revendications 7 à 9, caractérisé en ce que ledit au moins un appui d'étanchéité (210) est réalisé sous la forme d'une surface conique intérieure et/ou l'autre appui d'étanchéité (220) est réalisé sous la forme d'une surface conique extérieure.
  11. Ensemble d'appareil selon la revendication 9 ou 10, avec un organe d'ajout (100) selon une des revendications 5 à 6, dans lequel une distance des deux éléments d'étanchéité (110, 120) sur l'organe d'ajout (100) correspond essentiellement à une distance des deux appuis d'étanchéité (210, 220) sur l'élément de boîtier (200).
  12. Utilisation d'un organe d'ajout tubulaire (100) selon l'une quelconque des revendications 1 à 6 pour le dosage d'une substance d'addition dans un mélange à pomper, en particulier dans un mélange à prise hydraulique à pomper, particulièrement dans une composition de béton à projeter.
EP12708691.6A 2011-01-12 2012-01-12 Organe d'ajout et élément de boîtier pour un dispositif mélangeur Active EP2663435B1 (fr)

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EP12708691.6A EP2663435B1 (fr) 2011-01-12 2012-01-12 Organe d'ajout et élément de boîtier pour un dispositif mélangeur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11150748A EP2476530A1 (fr) 2011-01-12 2011-01-12 Pièce auxiliaire et élément de boîtier pour un dispositif de mélange
PCT/EP2012/050416 WO2012095480A1 (fr) 2011-01-12 2012-01-12 Organe d'ajout et élément de boîtier pour un dispositif mélangeur
EP12708691.6A EP2663435B1 (fr) 2011-01-12 2012-01-12 Organe d'ajout et élément de boîtier pour un dispositif mélangeur

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EP2663435B1 true EP2663435B1 (fr) 2017-05-17

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EP (2) EP2476530A1 (fr)
JP (1) JP6001556B2 (fr)
CN (1) CN103328170B (fr)
AU (1) AU2012206572B2 (fr)
BR (1) BR112013017486A2 (fr)
CA (1) CA2824228C (fr)
CL (1) CL2013002017A1 (fr)
MX (1) MX347222B (fr)
WO (1) WO2012095480A1 (fr)

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US11766807B2 (en) 2017-01-15 2023-09-26 Michael George BUTLER Apparatuses and systems for and methods of generating and placing zero-slump-pumpable concrete
CN107939048A (zh) * 2017-12-29 2018-04-20 湖南鹏翔星通汽车有限公司 喷射装置、喷头总成及混凝土喷射车
CN109676787B (zh) * 2019-01-28 2019-09-24 河南三和水工机械有限公司 一种环保型干混砂浆搅拌装置
CN113006489A (zh) * 2021-03-04 2021-06-22 天造机器人科技(广东)有限公司 一种送料口辅料添加喷头及装配方法
DE102021121046A1 (de) * 2021-08-12 2023-02-16 Wilhelm Tölke GmbH & Co KG Vorrichtung und Verfahren zur Herstellung von Bauwerken oder Objekten aus eingefärbtem Beton

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Also Published As

Publication number Publication date
EP2663435A1 (fr) 2013-11-20
US20130272083A1 (en) 2013-10-17
JP6001556B2 (ja) 2016-10-05
EP2476530A1 (fr) 2012-07-18
CA2824228A1 (fr) 2012-07-19
JP2014505813A (ja) 2014-03-06
AU2012206572B2 (en) 2016-09-08
CN103328170B (zh) 2016-08-10
CA2824228C (fr) 2019-06-11
AU2012206572A1 (en) 2013-07-25
CL2013002017A1 (es) 2013-12-13
BR112013017486A2 (pt) 2016-10-04
US10160138B2 (en) 2018-12-25
MX347222B (es) 2017-04-20
MX2013008041A (es) 2013-09-16
WO2012095480A1 (fr) 2012-07-19
CN103328170A (zh) 2013-09-25

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