EP0034745B1 - Tiroir de commande pour pompes à liquides visqueux - Google Patents

Tiroir de commande pour pompes à liquides visqueux Download PDF

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Publication number
EP0034745B1
EP0034745B1 EP81100908A EP81100908A EP0034745B1 EP 0034745 B1 EP0034745 B1 EP 0034745B1 EP 81100908 A EP81100908 A EP 81100908A EP 81100908 A EP81100908 A EP 81100908A EP 0034745 B1 EP0034745 B1 EP 0034745B1
Authority
EP
European Patent Office
Prior art keywords
wear
slide valve
casing
resistant housing
halves
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.)
Expired
Application number
EP81100908A
Other languages
German (de)
English (en)
Other versions
EP0034745A1 (fr
Inventor
Horst Heckmann
Werner Nawroth
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to AT81100908T priority Critical patent/ATE4738T1/de
Publication of EP0034745A1 publication Critical patent/EP0034745A1/fr
Application granted granted Critical
Publication of EP0034745B1 publication Critical patent/EP0034745B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/003—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having a slidable movement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7504—Removable valve head and seat unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86558—Plural noncommunicating flow paths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86879—Reciprocating valve unit

Definitions

  • the invention relates to a control slide valve for thick matter pumps, which in a flat housing divided into halves has a control plate which can be moved back and forth with at least one slide rod for the alternate opening and closing of each channel which passes through the housing and through which the thick material flows.
  • the invention relates in particular to the pumping of thick materials which contain abrasive and possibly also fine-grained solids. Therefore, the invention is particularly suitable for concrete pumps, because concrete contains sharp-edged aggregates and cement slurry, which also sets under water.
  • the control spool according to the invention can be e.g. install in a pipe switch between the flanges of a downpipe and a feed or discharge pipe. However, it is preferably installed on concrete pumps between the bottom of a prefilling container and the discharge pipes of a two-cylinder piston pump and / or the delivery line and the discharge pipes.
  • the control slide described at the beginning is already known (DE-B No. 1905706).
  • the seal to the outside is provided by a stuffing box, which encloses pipes that are drawn onto the two ends of the slide rod and move with it during the back and forth movement of the control slide in the parting plane of the housing in front of the openings of the two channels arranged side by side.
  • wear plates are solid bodies made of appropriate metal alloys, which consist of a relatively tough and wear-resistant steel.
  • the achievable success is of course limited to the relevant parts of the housing and therefore does not offer full wear protection.
  • Replacing the wear surface means loosening the fasteners, e.g. Screws, welds, ahead.
  • the invention has for its object to provide a full wear protection in the above sense, which is not only easy to install in the housing, but can also be removed from it when it is used up and should be replaced with a fresh wear protection.
  • control plate and the slide rod are movably arranged in a wear shell surrounding them and provided with lining rings for the housing channels, and in that the hollow bodies, which can be threaded onto the slide rod from one side, can be assembled and inserted a recess of the inner sides of the housing halves can be inserted in a form-fitting manner.
  • the boundary edges running perpendicular to the flat sides of the wear shell provided with the lining rings have inclined roof-shaped slopes, to which corresponding inclined surfaces on the boundary edges of the housing recess receiving the wear shell are assigned.
  • the design of the wear protection in the form of the described shell which can be inserted into the housing halves and which is composed of several hollow bodies above the flat slide valve and the slide rod removes the housing. completely under the influence of the thick material and the moving parts.
  • An alloy containing chromium and vanadium is particularly suitable as the material for the wear shell to be cast, which alloy is adjusted to a certain extent to reduce the risk of breakage.
  • the preferred embodiment of the invention also leads to the fact that the thick materials penetrating into the gaps between moving parts and stationary parts become wear-resistant Hit material on the resting parts that make up the shell.
  • the tough metal alloys mentioned at the outset, from which the wear tray can be cast, are particularly suitable for this purpose.
  • the assembly of such a shell requires only clean surfaces, on which the positive connection is created, which holds the wear shell against the moving parts of the control slide during operation. Dismantling is easy because when the housing halves are lifted off the wear shell, the beveled surfaces lead to corresponding force components in the surface planes, which apply shear forces to the bonds, which are immediately released as a result.
  • the control slide according to the invention is preferably simplified by dividing the wear shell into identical hollow bodies.
  • the wear tray is divided into equal halves along a parting plane perpendicular to the parting plane of the housing, which form a structural unit with the lining rings.
  • Such an embodiment creates the possibility of realizing the wear tray with a relatively simple casting.
  • the recess in the housing that receives the wear shell is formed half in one of the two congruent housing halves.
  • the wear tray which is rectangular in the housing plane, has guide tubes for a slide rod arranged on at least one of its long sides and with its hollow bodies and on the other long side has a guide link for the edge plate of the control plate, which is in one piece with the hollow bodies, and that the narrow sides of the wear shell between the end faces of the guides are curved in accordance with the lining rings.
  • This also results in a shape for the wear tray, which has surfaces which act in all directions and therefore improve the form fit.
  • the housing shown in Figs. 1 and 2 is schematic compared to the representations in Figs. 3 to 7, i.e. reproduced in a simplified line.
  • This illustration is intended to show the basic structure of the control slide valve according to the invention, which is designated by 1.
  • the flat slide valve housing 2 then has two juxtaposed ones made of a thick material, e.g. Channels 3, 4 through which concrete flows and, as can be seen in FIG. 2, are assembled from two identical halves 5 and 6, respectively. On the inside, both halves have a recess for receiving the wear tray 9, which in turn is divided into two equal halves 7, 8.
  • the wear tray encloses the flat control plate shown in dash-dotted lines at 10 in FIG.
  • the housing Since the wear shell 9 is inserted in a form-fit manner in a closed recess 12 of the housing 2, the housing has corresponding recesses at 14 and 15, through which the slide rod 11 is guided outwards. These recesses are lined with wear sleeves 16 and 17, respectively.
  • the wear shell 9 has roof-shaped inclined surfaces 18 and 19 attached to its outer edges, which interact with correspondingly beveled surfaces 20 and 21 of the housing.
  • the housing halves 5, 6 have a plurality of bores 30 which can be aligned with one another and receive fastening screws 31 which hold the two housing halves 5 and 6 together.
  • the at the housing halves 5 and 6 cast parts are the same cast side, and the wear shell also consists of two identical hollow bodies 7, 8.
  • one half 34, 35 of a recess 37 is attached to the inside 33 of each housing half 5, 6, which the Wear tray 9 picks up.
  • the recess is designed in such a way that the wear shell can be fitted with a flat middle part 38 to the lining rings 39, 40 protruding from the plane of its outer surfaces for the channels 3, 4 provided in the housing halves 5, 6.
  • the pipe guides 22, 23 at 41 and a guide link 42 at 43 are also fitted.
  • a guide bar 44 runs in the guide link 42, which is formed in one piece on the control plate 10 and has a fastening bar 46 on the opposite side with which it is connected to the slide rod 11.
  • the wear tray 9, e.g. 1 shows, divided along a dividing plane 46 perpendicular to the parting plane of the housing into equal halves which are realized with the two hollow bodies 7, 8.
  • Each hollow body forms a structural unit with the lining rings 39, 40 and the parts of the link 42 or the guide tubes 23 assigned to it.
  • a narrow side of the wear shell 9 is formed on each half 7, 8.
  • On this narrow side 47 are the end faces 48, 49 of the guide tubes 22, 23 or the link 42 which are offset according to the exemplary embodiment.
  • a curvature 50 which corresponds to the curvature of the lining rings 39, 40.
  • the hollow body 7 is first threaded onto the guide rod 11 from the left. It can then be pushed so far to the right until the guide bar 44 or the subsequent curvature of the control plate 10 come to rest against the corresponding inner sides of the hollow body 7. In a corresponding manner, the hollow body 8 is pushed onto the rod 11 from the right according to FIG. 4 until both hollow bodies touch at the parting plane 46, which is shown in FIG. 5.
  • the parts assembled in this way are, according to FIG. 6, from above into the lower housing half 6, i.e. inserted into the half 35 of the recess located there after the wear bushings 16, 17 described at the outset have been threaded onto the ends of the slide rod 11. Then the upper housing half 5 can be closed so that the screws 31 can be inserted and tightened.
  • the housing can be positively attached between flanges due to the peripheral recesses 53, 54, 56 made on its circumference.
  • the slide rod 11 cooperates on both sides with a piston which runs in cylinders pressurized with oil, which are used as a drive for the slide plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sliding Valves (AREA)
  • Reciprocating Pumps (AREA)
  • Multiple-Way Valves (AREA)

Claims (6)

1. Tiroir de commande (1) pour pompes à liquides visqueux ou épais, qui comporte, dans un boîtier plat (2) subdivisé en moitiés (5, 6), une plaque de commande (10) comprenant au moins une tige de poussée (11) pouvant effectuer un mouvement de va-et-vient en vue de l'ouverture et de la fermeture alternée de passages (3, 4) respectifs traversant le boîtier (2) et dans lesquels passe le liquide épais, caractérisé en ce que la plaque de commande (10) et la tige (11 ) du tiroir sont disposées dans une coquille d'usure (9) qui les entoure et qui est munie d'anneaux de revêtement (39, 40) destinés aux passages (3, 4) du boîtier, et en ce que la coquille d'usure (9) est constituée par l'assemblage de plusieurs corps creux (7, 8) pouvant être chacun enfilé sur la tige (11) du tiroir par un côté, et peut être disposée dans un évidement (37) de forme correspondante prévu sur les côtés internes (33) des moitiés (5, 6) du boîtier.
2. Tiroir de commande selon la revendication 1, caractérisé en ce que les bords externes des anneaux de revêtement (39, 40) et les bords limites qui sont disposés perpendiculairement aux côtés plats (38) de la coquille d'usure (9) munis d'anneaux de revêtement (39, 40) comprennent des parties en oblique (18, 19) en forme de toit dont les surfaces en oblique (20, 21 ) correspondantes sont associées aux bords limites de l'évidement (37) du boîtier destiné à la coquille d'usure (9).
3. Tiroir de commande selon l'une des revendications 1 ou 2, caractérisé en ce que la coquille d'usure (9) est subdivisée en moitiés de même forme le long d'un plan de séparation (46) perpendiculaire au plan de séparation du boîtier, moitiés qui forment un ensemble avec les anneaux de revêtement (39,40).
4. Tiroir de commande selon l'une des revendications 1 à 3, caractérisé en ce que l'évidement (37) du boîtier destiné à recevoir la coquille d'usure (9) est formé par des moitiés qui sont constituées respectivement dans chacune des deux moitiés (5, 6) du boîtier qui se recouvrent par symétrie.
5. Tiroir de commande selon l'une des revendications 1 à 4, caractérisé en ce que la coquille d'usure (9), qui est rectangulaire dans le plan du boîtier, comprend des tubes de guidage (22, 23) solidaires des corps creux (7, 8) et disposés au moins le long de l'un de ses côtés longitudinaux et destinés à la tige (11 ) du tiroir, ou bien une bande de guidage (42) solidaire des corps creux (7, 8) sur son autre côté longitudinal et destinée à une bande marginale (44) de la plaque de commande (40), et en ce que les côtés étroits de la coquille d'usure (9) situés entre les côtés frontaux (48, 49) des dispositifs de guidage (22, 23; 42) sont courbés de la même manière que les anneaux de revêtement (39,40).
6. Tiroir de commande selon la revendication 5, caractérisé en ce que les côtés frontaux (48, 49) des dispositifs de guidage sont décalés les uns par rapport aux autres.
EP81100908A 1980-02-21 1981-02-10 Tiroir de commande pour pompes à liquides visqueux Expired EP0034745B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100908T ATE4738T1 (de) 1980-02-21 1981-02-10 Steuerschieber fuer dickstoffpumpen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3006542A DE3006542C2 (de) 1980-02-21 1980-02-21 Steuerschieber für Dickstoffpumpen
DE3006542 1980-02-21

Publications (2)

Publication Number Publication Date
EP0034745A1 EP0034745A1 (fr) 1981-09-02
EP0034745B1 true EP0034745B1 (fr) 1983-09-21

Family

ID=6095223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100908A Expired EP0034745B1 (fr) 1980-02-21 1981-02-10 Tiroir de commande pour pompes à liquides visqueux

Country Status (13)

Country Link
US (2) US4392510A (fr)
EP (1) EP0034745B1 (fr)
JP (1) JPS56159574A (fr)
AR (1) AR225069A1 (fr)
AT (1) ATE4738T1 (fr)
AU (1) AU545163B2 (fr)
BR (1) BR8101057A (fr)
CA (1) CA1156090A (fr)
DD (1) DD157817A5 (fr)
DE (1) DE3006542C2 (fr)
ES (1) ES8201692A1 (fr)
GR (1) GR74801B (fr)
MX (1) MX154792A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3433569A1 (de) * 1984-09-13 1986-03-20 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Steuerschieber zum einbau in die abgasleitung von kraftfahrzeugen o.dgl.
US4869653A (en) * 1987-10-07 1989-09-26 Marlen Research Corporation Compact twin piston pump
US4867202A (en) * 1988-11-14 1989-09-19 Cargo Walker, Inc. Curtain valve arrangement
US5144699A (en) * 1990-07-20 1992-09-08 Kenneth Graham Plumbing drainage system
GB2258908B (en) * 1991-08-21 1995-06-14 Stoves Ltd Improvements in and relating to fluid flow control valves
CH686457A5 (de) * 1992-08-11 1996-03-29 Sistag Platten-Schieber.
US5620025A (en) * 1994-12-01 1997-04-15 Associated Universities, Inc. Multi-port valve
DE10312444B3 (de) * 2003-03-20 2004-11-18 Skp Konstruktion Und Service Gmbh Dosierpumpe für mit Zusatzstoffen versetzte flüssige Medien
DE102004009362B4 (de) * 2004-02-26 2008-01-24 Schwing Gmbh Kolben-Dickstoffpumpe
US8621884B2 (en) * 2008-11-12 2014-01-07 Hoffman Enclosures, Inc. AC unit with economizer and sliding damper assembly
EP2806194B1 (fr) * 2013-05-21 2018-01-03 WABCO Europe BVBA Vanne de mise à niveau pour décharge et alimentation en fluide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998781A (en) * 1960-11-28 1961-09-05 Giant Ind Pump for plastic concrete
US3327634A (en) * 1965-08-30 1967-06-27 Whiteman Mfg Company Concrete pumping apparatus
DE1908741A1 (de) * 1969-02-21 1970-09-03 Schwing Dipl Ing Friedrich Wil Kolbenpumpe zum Foerdern von Beton

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE654112C (de) * 1932-08-09 1937-12-10 Otto Kaiser Maschf Betonpumpe
DE1813237U (de) 1960-04-16 1960-06-15 Johannes Dr Med Hille Massagebank.
DE1908741U (de) 1964-11-26 1965-01-21 Karl Dr Weitnauer Halter zum verwahren von milchflaschen od. dgl.
FR1578943A (fr) * 1967-05-09 1969-08-22
US3559951A (en) * 1968-06-04 1971-02-02 Whiteman Mfg Co Gate valve for cement and like materials
DE1905706C2 (de) * 1969-02-05 1970-11-12 Schwing Friedrich Wilh Steuerschieber fuer Dickstoffpumpen
US3650641A (en) * 1970-08-25 1972-03-21 Desa Industries Concrete pumping machine
BR7607022A (pt) * 1976-10-20 1978-05-09 Schwing Gmbh F Registro de distribuicao para bombas de materias conistentes
DE2700800C3 (de) * 1977-01-11 1980-10-16 Herbert 4690 Herne Kuhlmann Steuerschieber für Betonpumpen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998781A (en) * 1960-11-28 1961-09-05 Giant Ind Pump for plastic concrete
US3327634A (en) * 1965-08-30 1967-06-27 Whiteman Mfg Company Concrete pumping apparatus
DE1908741A1 (de) * 1969-02-21 1970-09-03 Schwing Dipl Ing Friedrich Wil Kolbenpumpe zum Foerdern von Beton

Also Published As

Publication number Publication date
DD157817A5 (de) 1982-12-08
GR74801B (fr) 1984-07-12
EP0034745A1 (fr) 1981-09-02
ES499628A0 (es) 1981-12-16
ES8201692A1 (es) 1981-12-16
AU6749181A (en) 1981-08-27
CA1156090A (fr) 1983-11-01
DE3006542C2 (de) 1985-01-17
MX154792A (es) 1987-12-14
AU545163B2 (en) 1985-07-04
AR225069A1 (es) 1982-02-15
DE3006542A1 (de) 1981-08-27
USRE32041E (en) 1985-11-26
JPS56159574A (en) 1981-12-08
ATE4738T1 (de) 1983-10-15
BR8101057A (pt) 1981-09-01
US4392510A (en) 1983-07-12

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