EP0849469A2 - Pompe à deux cylindres pour liquide épais avec distributeur à tube pivotant - Google Patents

Pompe à deux cylindres pour liquide épais avec distributeur à tube pivotant Download PDF

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Publication number
EP0849469A2
EP0849469A2 EP97120146A EP97120146A EP0849469A2 EP 0849469 A2 EP0849469 A2 EP 0849469A2 EP 97120146 A EP97120146 A EP 97120146A EP 97120146 A EP97120146 A EP 97120146A EP 0849469 A2 EP0849469 A2 EP 0849469A2
Authority
EP
European Patent Office
Prior art keywords
sealing
ring
spring element
rubber
pipe switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97120146A
Other languages
German (de)
English (en)
Other versions
EP0849469A3 (fr
EP0849469B1 (fr
Inventor
Hartmut Dr. Benckert
Hellmut Dipl.-Ing. Hurr
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.)
Putzmeister Concrete Pumps GmbH
Original Assignee
Putzmeister 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
Application filed by Putzmeister AG filed Critical Putzmeister AG
Publication of EP0849469A2 publication Critical patent/EP0849469A2/fr
Publication of EP0849469A3 publication Critical patent/EP0849469A3/fr
Application granted granted Critical
Publication of EP0849469B1 publication Critical patent/EP0849469B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B7/0084—Component parts or details specially adapted therefor
    • F04B7/0088—Sealing arrangements between the distribution members and the housing
    • F04B7/0096—Sealing arrangements between the distribution members and the housing for pipe-type distribution members

Definitions

  • the invention relates to a pipe switch for a two-cylinder thick matter pump with one in front of a cylinder side Glasses plate swiveling swivel tube that at the glasses plate with one on the tube end of the swivel tube forming a fraction of its length a radial guide gap axially guided cutting ring which cutting ring fits tightly rubber-elastic ring-shaped sealing and spring element is pressed onto the eyeglass plate, which is from Pressure of the fluid handled on the inside of the sealing and Spring element on two mutually facing sealing and Support surfaces of the swivel tube and the cutting ring bridging and sealing the guide gap is present and a metallic spreading device, if necessary contains.
  • the swivel tube is at the end of a conveyor tube connected.
  • the sealing and spring element has especially the function of sealing the guide gap against access of liquid concrete from the Swivel tube interior. It also helps the Cutting ring under a certain pressure even when depressurized Preload pressed against the glasses plate becomes. Since the sealing and spring element inside the Swivel tube is exposed to the flow, exists especially in suction mode, the risk that it from his Sealing seat lifted in front of the guide gap and from conveying medium is carried along. To do this To avoid, has already been proposed in the rubber elastic Sealing and spring element a metallic Insert spreader (DE-C 26 14 895). The known spreaders of this type are closed Metal rings vulcanized into the sealing and spring ring will.
  • the invention is based on the object the well-known pipe switch of the beginning Kind to improve in that the sealing and Spring element simply manufactured and repaired on site can be and in all operating conditions cannot be lost.
  • the sealing and spring element an annular closed round hose made of rubber elastic Has material in the hose channel either a helically wound one, open at its ends
  • Wire ring made of stiff elastic material or a Stiffly elastic filling medium is arranged.
  • the wire ring is made of spring steel, for example or a glass fiber reinforced plastic wire. He expediently has 1.5 to 2 against each other Wire turns on.
  • a major advantage of the open, preferably from Spring steel existing wire rings is that he within certain limits changes in diameter of the sealing and Spring element allowed and that the spreading forces can be adjusted by selecting the spring material.
  • a stiffly elastic filler When using a stiffly elastic filler becomes a round tube closed at its ends made of rubber-elastic material with a Provide jacket opening and the curable filling medium in liquid or pasty form in the hose channel injected and there forming a stiff elastic Strands cured.
  • the jacket opening can be in front or closed after the filling medium has hardened, preferably be taped or welded.
  • a filling medium comes, for example, a rigid elastomer or silicone into consideration.
  • Another preferred embodiment of the invention provides that at least one of the sealing and support surfaces of the swivel tube or the cutting ring in sections than diverging towards the other sealing and supporting surface Cone surface is formed, the cone surface at least partially concavely curved in longitudinal section and / or via a concave ring stage in a Cylindrical guide surface delimiting the guide gap can pass over.
  • a sliding layer made of a water-repellent material, preferably made of Polyfluorotetraethylene (PFTE) are coated.
  • PFTE Polyfluorotetraethylene
  • the two-cylinder slurry pump shown in sections in the drawing is the conveyor cylinder at the mouths 10 on the side of the rear wall 12 of a material feed container 14 through one with two openings 16 glasses-shaped for the passage of material Wear plate (glasses plate 18) covered.
  • an S-shaped curved swivel tube 20 with its one cutting ring 22 supporting end face in front of the eyeglass plate 18 by means of a pivot shaft 24 about a horizontal axis so pivoted back and forth that its cylinder-side Alternate opening in front of the two openings 16 of the glasses plate 8 arrives and each other opening 16 to the inside of the material feed container 14 releases.
  • the pivot tube 20 and the cutting ring 22 are in the space between their mutually facing sealing and Support surfaces 46, 48 of a rubber elastic bridging annular sealing and spring element 50, that with its outward-facing surface 54 the radial Guide gap 52 between the cylindrical centering surface 26 and the centering ring 28 opposite the Pumped medium seals inside the pipe and that in the area its inner surface 56 with the hydraulic pressure of the pumped medium.
  • the sealing and spring element 50 consists of one at a joint ring-shaped round tube 58 made of rubber, in its central channel 60 with a spring steel wire a number of turns of 1.9 wound on their chamfered Ends 62 open radial spring 64 as a spreading device is arranged.
  • the sealing and support surface 48 of the cutting ring 22 has a section 66 which is conical towards the swivel tube 20 on the via a concave ring step 68 in the guide gap 52 delimiting cylindrical guide surface 70 passes.
  • the sealing and support surfaces 46, 48 are preferably with a water-repellent, abrasion-resistant coating made of polyfluorotetraethylene (PFTE) coated, which prevents that during the conveyor operation can harden mortar.
  • PFTE polyfluorotetraethylene
  • the invention relates to a pipe switch for a two-cylinder slurry pump especially for a concrete pump.
  • the pipe switch has a cylinder in front Glasses plate 18 pivotable swivel tube 20, that on the glasses plate 18 with one on the tube end of the swivel tube 20 with a fraction of its length axially forming a radial guide gap 52 guided cutting ring 22 is sealing, which Cutting ring 22 through an annular sealing and spring element 50 is pressed onto the spectacle plate 18, whereby the pressure on the inside of the pumped medium Sealing and spring element 50 on two facing each other Sealing and support surfaces 46, 41 of the swivel tube 20 and the cutting ring 22 with bridging and sealing of the guide gap 52 is present.
  • the sealing and spring element 50 has an annular shape closed round hose made of rubber-elastic material on, in the central channel a helical coiled wire ring 64 open at its ends is arranged from stiff elastic material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP97120146A 1996-12-21 1997-11-18 Pompe à deux cylindres pour liquide épais avec distributeur à tube pivotant Expired - Lifetime EP0849469B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654023 1996-12-21
DE19654023A DE19654023A1 (de) 1996-12-21 1996-12-21 Rohrweiche für eine Zweizylinder-Dickstoffpumpe

Publications (3)

Publication Number Publication Date
EP0849469A2 true EP0849469A2 (fr) 1998-06-24
EP0849469A3 EP0849469A3 (fr) 1999-02-10
EP0849469B1 EP0849469B1 (fr) 2003-04-23

Family

ID=7816015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120146A Expired - Lifetime EP0849469B1 (fr) 1996-12-21 1997-11-18 Pompe à deux cylindres pour liquide épais avec distributeur à tube pivotant

Country Status (3)

Country Link
EP (1) EP0849469B1 (fr)
DE (2) DE19654023A1 (fr)
ES (1) ES2195070T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072543A1 (fr) * 1999-07-27 2001-01-31 PUTZMEISTER Aktiengesellschaft Silo
DE102004015181A1 (de) * 2004-03-25 2005-10-13 Putzmeister Ag Materialaufgabebehälter für eine Dickstoffpumpe
US7407022B2 (en) 2004-07-27 2008-08-05 Clarke Uk, Ltd. Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use
EP2520726A1 (fr) 2011-05-06 2012-11-07 BRA turbo Ing AG Dispositif et procédé de prélèvement de dépôts de matériaux du réservoir d'une construction hydrotechnique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2614895A1 (de) * 1976-04-07 1977-10-20 Schlecht Karl Beton-rohrweiche
US4382752A (en) * 1979-02-01 1983-05-10 Karl Schlecht Twin-cylinder pump, in particular for pumping thick liquids
DE3414180A1 (de) * 1984-04-14 1985-10-24 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Dichtungseinrichtung fuer aneinanderstossende, zumindest etwa rohrfoermige bauteile, insbesondere fuer betonformteile
EP0450392A1 (fr) * 1990-03-20 1991-10-09 Peter J. Balsells Ressort hélicoidal avec élastomère à section transversale creuse

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049648B (fr) * 1959-01-29
DD63238A (fr) *
DE575348C (de) * 1930-03-15 1933-04-27 Hydrierwerke Akt Ges Deutsche Verfahren zur Geruchsverbesserung von Holzgeistoelen
DE1653456A1 (de) * 1966-10-28 1971-04-15 Alfred Heidt Kombinierte Kolben-Foerderpumpe mit Zusatzkompressor und Pressluft-Stroemungskanal,besonders fuer Mischbeton und halbfluessiges Foerdergut,das aus einer Mischung von festem und fluessigem Material besteht
US3897088A (en) * 1973-12-12 1975-07-29 Amp Inc Sealing boot
DE7614221U1 (de) * 1976-05-05 1976-10-07 Fa. Paul Hammerstein, 2000 Hamburg Vorrichtung zum abdichten von steckverbindungen von rohren
CH600206A5 (fr) * 1976-05-18 1978-06-15 Meister H & Co
FR2385011A1 (fr) * 1977-03-23 1978-10-20 Joint Francais Joint d'etancheite composite
DE7910958U1 (de) * 1979-04-14 1980-06-19 Wibau Industrie Und Verwaltung Gmbh, 6466 Gruendau Aufgabebehaelter mit flankenschutz aus elastischem material als bestandteil von fahrbaren betonpumpen
US4310161A (en) * 1979-06-15 1982-01-12 Halliburton Services Inflatable packer element
DE3216057A1 (de) * 1982-04-29 1983-11-03 Siemens AG, 1000 Berlin und 8000 München Druckausgleichende dichtung, insbesondere fuer kabelgarnituren
US4586718A (en) * 1985-09-06 1986-05-06 Crane Co. Sealing assembly with floating gland means for rotatable shafts
DE3918879A1 (de) * 1989-06-09 1990-12-13 Wolfgang Werner Dichtung und dichtender dehnungsausgleicher bestehend aus einem oder mehreren dehnbaren und/oder verformbaren hohlkoerpern
US5294133A (en) * 1991-09-10 1994-03-15 The United States Of America As Represented By The Secretary Of The Army Fluid-filled O-ring for maintaining a seal under low temperature conditions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2614895A1 (de) * 1976-04-07 1977-10-20 Schlecht Karl Beton-rohrweiche
US4382752A (en) * 1979-02-01 1983-05-10 Karl Schlecht Twin-cylinder pump, in particular for pumping thick liquids
DE3414180A1 (de) * 1984-04-14 1985-10-24 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Dichtungseinrichtung fuer aneinanderstossende, zumindest etwa rohrfoermige bauteile, insbesondere fuer betonformteile
EP0450392A1 (fr) * 1990-03-20 1991-10-09 Peter J. Balsells Ressort hélicoidal avec élastomère à section transversale creuse

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072543A1 (fr) * 1999-07-27 2001-01-31 PUTZMEISTER Aktiengesellschaft Silo
DE102004015181A1 (de) * 2004-03-25 2005-10-13 Putzmeister Ag Materialaufgabebehälter für eine Dickstoffpumpe
US7407022B2 (en) 2004-07-27 2008-08-05 Clarke Uk, Ltd. Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use
EP2520726A1 (fr) 2011-05-06 2012-11-07 BRA turbo Ing AG Dispositif et procédé de prélèvement de dépôts de matériaux du réservoir d'une construction hydrotechnique

Also Published As

Publication number Publication date
EP0849469A3 (fr) 1999-02-10
EP0849469B1 (fr) 2003-04-23
DE59709903D1 (de) 2003-05-28
DE19654023A1 (de) 1998-06-25
ES2195070T3 (es) 2003-12-01

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