EP0112404B1 - Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe - Google Patents

Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe Download PDF

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Publication number
EP0112404B1
EP0112404B1 EP82111988A EP82111988A EP0112404B1 EP 0112404 B1 EP0112404 B1 EP 0112404B1 EP 82111988 A EP82111988 A EP 82111988A EP 82111988 A EP82111988 A EP 82111988A EP 0112404 B1 EP0112404 B1 EP 0112404B1
Authority
EP
European Patent Office
Prior art keywords
ring
cutting ring
annular
spring
cylinder
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
EP82111988A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112404A1 (de
Inventor
Friedrich Dipl.-Ing. Schwing
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 AT82111988T priority Critical patent/ATE20270T1/de
Priority to DE8282111988T priority patent/DE3271599D1/de
Priority to EP82111988A priority patent/EP0112404B1/de
Priority to IL70038A priority patent/IL70038A/xx
Priority to ZA837967A priority patent/ZA837967B/xx
Priority to GR72833A priority patent/GR78944B/el
Priority to US06/548,987 priority patent/US4556370A/en
Priority to HU833829A priority patent/HU186813B/hu
Priority to AU21200/83A priority patent/AU559378B2/en
Priority to ES527623A priority patent/ES8501493A1/es
Priority to CA000443100A priority patent/CA1215578A/en
Priority to KR1019830005930A priority patent/KR900004615B1/ko
Priority to MX199792A priority patent/MX159733A/es
Priority to DD83258351A priority patent/DD220096A5/de
Priority to CS839810A priority patent/CS259866B2/cs
Priority to SU833679910A priority patent/SU1336952A3/ru
Priority to BR8307113A priority patent/BR8307113A/pt
Priority to PL1983245306A priority patent/PL142428B1/pl
Priority to JP58243134A priority patent/JPS59131778A/ja
Publication of EP0112404A1 publication Critical patent/EP0112404A1/de
Application granted granted Critical
Publication of EP0112404B1 publication Critical patent/EP0112404B1/de
Priority to SG230/88A priority patent/SG23088G/en
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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/58—Arrangements of pumps
    • B67D7/62—Arrangements of pumps power operated
    • B67D7/64—Arrangements of pumps power operated of piston type
    • B67D7/645—Barrel pumps
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the invention relates to a two-cylinder thick matter pump according to the preamble of claim 1.
  • the switching element executes a reciprocating movement in time with the pump strokes, at the end points of which the respective feeding cylinder is connected to a prefilling container and the pressing cylinder is connected to a delivery line.
  • the cutting ring breaks solid matter of the thick material during the movement of the switching element, which cannot escape it. To the extent that it dodges itself, this is made possible by the guide on the switching element, which also allows the cutting ring to be readjusted when the sealing surfaces wear out.
  • the cutting ring closes off the thick material flows to the outside and preferably seals metal on a spectacle plate in which openings for the feed cylinders are formed. This method of operation requires strong forces that advance the cutting ring in its direction towards the cylinder openings and press it onto the spectacle plate.
  • the invention is based on a previously known two-cylinder high-pressure pump (EP-A1-57288 or DE-OS 3103321).
  • the function-related gap in the guide between the cutting ring and the switching element is sealed (Fig. 8 op. Cit.).
  • This gap opens into a radial gap between the end face of the switching element and the cutting ring.
  • a gap is created between the cutting ring and the spectacle plate, in which the hydrostatic pressure is reduced to the outside by the metallic seal of the cutting ring.
  • the pressure acting in the gap creates a separating force by acting on the sealing surfaces.
  • this separating force is compensated for between the delivery phases in that the free end face of the cutting ring, which is connected to the pressure of the delivery medium, is acted upon by delivery pressure.
  • the cutting ring is pressed onto the spectacle plate with the mechanical prestress of the ring spring, so that the cutting ring also lies sealingly against the spectacle plate in these movement phases.
  • the seat for the rubber-elastic ring spring is made up of the radial surfaces on the back of the cutting ring and on the outside of the switching element, as well as an axial surface running over the length of the ring spring on the switching element itself and short, parallel counter surfaces on the cutting ring and are formed on the switching element. This prevents the ring spring from squeezing out of its seat at maximum compression due to the cutting ring immersed in the guide. An extended axial ring spring surface remains on the outside, which is exposed, between the seat surfaces.
  • the inner surface of the ring spring is accessible from the inside of the switching element and is acted upon by the hydrostatic pressure of the pumped medium.
  • the access gap from the interior of the switching element to the ring spring is chosen to be very large, so that it can be drawn into the pumping medium during suction operation of the thick matter pump and lost there. If this gap is narrowed, small stones in the concrete can quickly become blocked. However, this would release the pressurization of the ring spring and would result in the cutting ring being lifted off the eyeglass plate due to the pressure in the gap between the cutting ring and the eyeglass plate.
  • the invention has for its object to limit the pressure of the cutting ring in all operating phases to the minimum necessary to increase the functional reliability in a two-cylinder high-pressure pump of the type known as known.
  • the entire contact pressure of the cutting ring against the spectacle plate is transmitted from the ring spring to the cutting ring via its radial seat on the cutting ring.
  • the annular gap (according to DE-OS 31 03 321) between the end face of the switching element and the rear end face of the cutting ring is omitted, and according to the invention it remains as access of the conveying medium to the gap between the cutting ring and the spectacle plate and to the cylinder gap between the switching element and the ring spring only a gap between the front of the switching element and the glasses plate.
  • a solid seal if it forms at the entrance of this gap, thus interrupts at the same time all or part of the access of the medium to the sealing gap as well as to the gap between the switching element and the ring spring.
  • the cutting ring is thus pressed against the spectacle plate essentially only with the mechanical clamping force of the ring spring in each operating phase.
  • the pressure of the medium is fully effective in the sealing gap between the cutting ring and the spectacle plate and in the annular gap between the switching element and the ring spring.
  • the effect of the delivery pressure on the ring spring is such that its radial expansion is hindered by a socket surrounding it and converted into an axial expansion, so that a force or pressure component in the axial direction results from this on the cutting ring against the spectacle plate with axial support the ring spring against the switching element results.
  • the ring spring also simultaneously seals the interior from the outside.
  • the invention has the advantage that even with unfavorable properties of the thick material, as can be found in particular in concrete, which, under certain conditions, frequently forms the gap blockings or seals described, prevents premature destruction of the surfaces and components which seal one another.
  • the invention ensures a smooth movement of the switching element, because it reduces the pressing forces required for sealing to approximately the mechanical preload of the ring spring.
  • a short protrusion of the cutting ring beyond the cylinder-side end edge of the switching element and a correspondingly lengthened guide surface are also achieved, as a result of which the tilting resistance of the cutting ring on the switching element is achieved or improved.
  • the frame of the ring spring is accommodated in the rubber-elastic material itself.
  • This can have the form of a reinforcement spiral or a plurality of individual rings arranged one behind the other and can consist of fabric or fabric threads, but also of wires.
  • a two-cylinder thick matter pump has a cylinder head 1, which is connected to an eyeglass plate 2 and sealed at 3.
  • a switching element 5 moves with a front part 6 which can be replaced for reasons of wear.
  • a cutting ring 13 with its cylindrical inner surface 8 is guided on a front, outer cylindrical surface 7 of the switching element 5.
  • Its front end surface 10 lies on a counter surface 11 of the eyeglass plate 2.
  • Its rear end surface 12 forms a radial seat surface for an annular spring 14 made of rubber-elastic material.
  • This has a rectangular cross section, the longer sides of which have the axial dimension of inner and outer annular surfaces 15, 16 form while the annular end faces 17, 18 of the annular spring 14 are supported on the radial seat surface 12 of the cutting ring 13 or a radial seat surface 19 of a flange 20 of the viewing element 5, the flange 20 projecting outwards beyond the axial guide surface 7 of the switching element.
  • the ring spring is reinforced with a steel wire 29. This is wound helically or in a ring in the axial direction and in a ring plane. However, it forms several layers, some of which are shown at 30 to 32, which run from the outside inwards.
  • the steel wire armouring forms an annular spring mount, which constricts the rubber-elastic material of the annular spring and thus provides considerable resistance to the radial expansion of the annular spring, so that the annular spring therefore preferably expands in the axial direction.
  • the ring spring 14 seals off the radial seat surfaces 17, 18 and therefore reduces the hydrostatic pressure that prevails in the gap 28b, approximately in accordance with the course of forces shown at 34 and 35.
  • These hydrostatic forces with their resultants 36, 37, press the cutting ring 13 onto the spectacle plate 2 and add up to the forces 22, 23 of the mechanical ring spring preload.
  • the hydrostatic pressure which arises in the radial gap 38 between the end face 27 of the switching element 5 and the end face of the spectacle plate 2 is reduced on the sealing surfaces 10, 11 of the cutting ring 13 and the spectacle plate 2 from the inside to the outside in accordance with the force curve shown at 39, the resultant is drawn at 40. Since approximately the same forces 35, 39 can be assumed, the cutting ring is pressed in this operating phase of the two-cylinder high-pressure pump onto the spectacle plate with an excess force that corresponds to the mechanical ring spring preload force 22. The cutting ring 13 is thereby reliably sealed.
  • FIG. 4 shows the ring spring 14 in the relaxed state, at its inner boundary edges of its radial surfaces 18, 17 each with an axial outwardly projecting sealing lip 42, 43 provided which form a structural unit with the ring seal 14.
  • the ring seal 14 has a vulcanized-in steel ring 44, 45 on its radial surfaces, specifically in the area of the inner boundary edges.
  • Each steel ring 44, 45 seals on an O-ring 46, 47, which is in each case one Annular groove 48, 49; the annular grooves are screwed into the radial seating surfaces 12, 19 of the cutting ring 13 or the switching element 5.
  • FIGS. 1 to 3 are not shown in the embodiments according to FIGS. 6 and 7, which represent other ring spring configurations with regard to the sealing function of the ring spring. 6, however, the centering diameter 50 of the guidance of the cutting ring 13 with the surfaces 7, 8 is shown on the switching element 5. This centering diameter is smaller than the effective diameter 51 of the metallic seal of the cutting ring 13 on the spectacle plate 2 (resultant 40 in FIG. 2).
  • the ring spring 14 is not reinforced.
  • the ring flange 20 of the switching element 5 has an axial extension, which forms a sleeve 52 which surrounds the cutting ring 13 with its front part 53 without guiding it.
  • the seat 7, 8 also takes the lead here.
  • This socket 52 creates a closed interior 54 for the annular spring 14, which can therefore only deflect in the direction of the cutting ring 13 when the pressure in the annular space 28b increases and therefore prestresses it on the spectacle plate 2.
  • the bushing 52 no longer forms a structural unit with the ring flange 20 as shown in FIG. 6, but instead represents a part which is loose and which has a flange 54 on the end face 55 of the flange 20 is supported.
  • the ring spring 14 is inserted into this bushing 52.
  • the bushing 52 which surrounds the cutting ring 13 with its front part 53, in turn forms an annular spring mount, which allows the rubber-elastic material of the annular spring 14 to deflect only in the axial direction 13, so that when the pressure in the annular space 28 increases, the cutting ring 13 in turn expands with the hydrostatic force the glasses plate 2 is pressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rotary Pumps (AREA)
  • Detergent Compositions (AREA)
  • Springs (AREA)
  • Check Valves (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
EP82111988A 1982-12-24 1982-12-24 Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe Expired EP0112404B1 (de)

Priority Applications (20)

Application Number Priority Date Filing Date Title
AT82111988T ATE20270T1 (de) 1982-12-24 1982-12-24 Zweizylinderdickstoffpumpe, vorzugsweise betonpumpe.
DE8282111988T DE3271599D1 (en) 1982-12-24 1982-12-24 Two cylinder viscous liquid pump, especially a concrete pump
EP82111988A EP0112404B1 (de) 1982-12-24 1982-12-24 Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe
IL70038A IL70038A (en) 1982-12-24 1983-10-24 Sealing arrangement for twin cylinder pumps,especially for concrete
ZA837967A ZA837967B (en) 1982-12-24 1983-10-26 Twin cylinder pumps,more specially for concrete
GR72833A GR78944B (ja) 1982-12-24 1983-10-31
US06/548,987 US4556370A (en) 1982-12-24 1983-11-07 Twin cylinder pumps, more specially for concrete
HU833829A HU186813B (en) 1982-12-24 1983-11-08 Twin-cylinder slurry pump
AU21200/83A AU559378B2 (en) 1982-12-24 1983-11-14 Concrete pump valve
ES527623A ES8501493A1 (es) 1982-12-24 1983-11-29 Una bomba para materiales viscosos, preferentemente bomba para hormigon
CA000443100A CA1215578A (en) 1982-12-24 1983-12-12 Twin cylinder pumps, more specially for concrete
KR1019830005930A KR900004615B1 (ko) 1982-12-24 1983-12-14 콘크리트용 쌍 실린더 펌프
MX199792A MX159733A (es) 1982-12-24 1983-12-15 Mejoras en bomba cilindrica doble para concreto y lo similar
DD83258351A DD220096A5 (de) 1982-12-24 1983-12-21 Zweizylinderdickstoffpumpe, vorzugsweise betonpumpe
SU833679910A SU1336952A3 (ru) 1982-12-24 1983-12-22 Насос дл перекачивани в зких материалов
CS839810A CS259866B2 (en) 1982-12-24 1983-12-22 Double-clylinder pump for viscous substances
BR8307113A BR8307113A (pt) 1982-12-24 1983-12-23 Bomba de dois cilindros para materiais viscosos,de preferencia para concreto
PL1983245306A PL142428B1 (en) 1982-12-24 1983-12-23 Pump for thick materials,especially for concrete
JP58243134A JPS59131778A (ja) 1982-12-24 1983-12-24 粘性材料用双シリンダポンプ
SG230/88A SG23088G (en) 1982-12-24 1988-04-05 Two cylinder viscous liquid pump, especially a concrete pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82111988A EP0112404B1 (de) 1982-12-24 1982-12-24 Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe

Publications (2)

Publication Number Publication Date
EP0112404A1 EP0112404A1 (de) 1984-07-04
EP0112404B1 true EP0112404B1 (de) 1986-06-04

Family

ID=8189430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111988A Expired EP0112404B1 (de) 1982-12-24 1982-12-24 Zweizylinderdickstoffpumpe, vorzugsweise Betonpumpe

Country Status (20)

Country Link
US (1) US4556370A (ja)
EP (1) EP0112404B1 (ja)
JP (1) JPS59131778A (ja)
KR (1) KR900004615B1 (ja)
AT (1) ATE20270T1 (ja)
AU (1) AU559378B2 (ja)
BR (1) BR8307113A (ja)
CA (1) CA1215578A (ja)
CS (1) CS259866B2 (ja)
DD (1) DD220096A5 (ja)
DE (1) DE3271599D1 (ja)
ES (1) ES8501493A1 (ja)
GR (1) GR78944B (ja)
HU (1) HU186813B (ja)
IL (1) IL70038A (ja)
MX (1) MX159733A (ja)
PL (1) PL142428B1 (ja)
SG (1) SG23088G (ja)
SU (1) SU1336952A3 (ja)
ZA (1) ZA837967B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905355A1 (de) * 1989-02-22 1990-08-23 Schlecht Karl Rohrweiche fuer zweizylinder-dickstoffpumpen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037275A (en) * 1987-06-27 1991-08-06 Karl Schlecht Pipe junction switch for two-cylinder thick-material pump
US6443718B1 (en) * 2000-02-14 2002-09-03 Multiquip, Inc. Shuttle valve for concrete pump
WO2007111689A2 (en) * 2005-11-08 2007-10-04 Good Earth Tools, Inc. Sealing rings for abrasive slurry pumps
DE102009005318B3 (de) * 2009-01-16 2010-09-30 Schwing, Friedrich, Dipl.-Ing. Verfahren zur Förderung breiiger Massen und Pumpvorrichtung zur Förderung breiiger Massen
DE102013114008A1 (de) * 2013-12-13 2015-06-18 MPS-Matter Pumpsysteme GmbH Dickstoffpumpvorrichtung, insbesondere für eine fahrbare Dickstoffpumpe

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957717A (en) * 1957-03-13 1960-10-25 Cie De Pont A Mousson Sealing members and reinforcements therefor
US3813105A (en) * 1972-04-03 1974-05-28 M Mcqueen Seal
US4015818A (en) * 1975-07-23 1977-04-05 International Telephone And Telegraph Corporation Valve with self-retaining valve seat
DE2614895A1 (de) * 1976-04-07 1977-10-20 Schlecht Karl Beton-rohrweiche
US4198193A (en) * 1978-05-12 1980-04-15 Walters James F Automatic wear compensation apparatus for concrete pumping hopper apparatus
DE2829181A1 (de) * 1978-07-03 1980-01-17 Scheele Maschf W Rohrweiche fuer eine betonpumpe
DE2921735A1 (de) * 1979-05-29 1980-12-04 Teka Baumaschinen Gmbh Vorrichtung zum dichten einer betonpumpe
US4337017A (en) * 1979-09-26 1982-06-29 Evenson William R Hydraulic sleeve valve and seal arrangement for piston pump
DE3042930A1 (de) * 1980-11-14 1982-07-08 Stetter Gmbh, 8940 Memmingen Rohrweiche fuer betonpumpen
DE3153268C2 (en) * 1981-01-31 1988-01-28 Friedrich Wilh. Schwing Gmbh, 4690 Herne, De Two-cylinder viscous-material pump, preferably concrete pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905355A1 (de) * 1989-02-22 1990-08-23 Schlecht Karl Rohrweiche fuer zweizylinder-dickstoffpumpen

Also Published As

Publication number Publication date
AU2120083A (en) 1984-06-28
DD220096A5 (de) 1985-03-20
SG23088G (en) 1988-09-30
MX159733A (es) 1989-08-11
KR900004615B1 (ko) 1990-06-30
CA1215578A (en) 1986-12-23
GR78944B (ja) 1984-10-02
ES527623A0 (es) 1984-11-16
JPS59131778A (ja) 1984-07-28
CS259866B2 (en) 1988-11-15
ATE20270T1 (de) 1986-06-15
HU186813B (en) 1985-09-30
PL142428B1 (en) 1987-10-31
IL70038A (en) 1988-09-30
EP0112404A1 (de) 1984-07-04
SU1336952A3 (ru) 1987-09-07
US4556370A (en) 1985-12-03
PL245306A1 (en) 1984-08-13
DE3271599D1 (en) 1986-07-10
AU559378B2 (en) 1987-03-05
KR840007145A (ko) 1984-12-05
BR8307113A (pt) 1984-08-07
ES8501493A1 (es) 1984-11-16
ZA837967B (en) 1984-06-27
CS981083A2 (en) 1988-04-15

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