EP0519217A1 - Distributeur oscillant pour une pompe à béton à deux pistons - Google Patents

Distributeur oscillant pour une pompe à béton à deux pistons Download PDF

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Publication number
EP0519217A1
EP0519217A1 EP92108241A EP92108241A EP0519217A1 EP 0519217 A1 EP0519217 A1 EP 0519217A1 EP 92108241 A EP92108241 A EP 92108241A EP 92108241 A EP92108241 A EP 92108241A EP 0519217 A1 EP0519217 A1 EP 0519217A1
Authority
EP
European Patent Office
Prior art keywords
grease
concrete
swivel
switch according
bearing points
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.)
Withdrawn
Application number
EP92108241A
Other languages
German (de)
English (en)
Inventor
Herbert Jung
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0519217A1 publication Critical patent/EP0519217A1/fr
Withdrawn legal-status Critical Current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 swivel switch for a double-piston concrete pump with an S-shaped swivel pipe pivotably mounted about an axis of rotation in a concrete suction housing, at least some of the bearing points being designed as grease-lubricated bush bearings, to which grease supply lines are connected, via which by means of a connected grease gun can be supplied with grease, and the bearings are sealed against the ingress of concrete.
  • Such a double-piston concrete pump is known from DE-OS 30 09 746. It is a concrete pump with two pump cylinders arranged axially next to one another and counter-rotating pump pistons provided therein. The pump cylinders are each open at one of their front ends and on the one hand suck in the concrete through this opening and expel it in the next stroke. For this purpose, a funnel-shaped concrete suction housing is provided on this side of the concrete pump, into which the two open ends of the pump cylinders open.
  • the S-shaped swivel tube belonging to the swivel switch is mounted in such a way that the pipe axis of the discharge end coincides with the axis of rotation, while the pipe axis of the end facing the openings of the pump cylinders is spaced parallel from the axis of rotation. In this way, the swivel tube can be swiveled with this end in front of the opening of one or the other pump cylinder.
  • the bearings in the known swivel switches are connected to grease supply lines, so that the bearings are regularly lubricated during operation. It naturally does not fail that on the one hand grease gets into the concrete to be pumped and thereby deteriorates its quality, and on the other hand that grease also gets outside into the environment. It has furthermore been found that the penetration of concrete or its very fine particles into the bearing points or these seals cannot be prevented in this way. Such penetration of very fine particles between the seal and shaft leads unnoticed to a relatively quick destruction of the seal and then also to rapid wear of the sealing surfaces of the swivel tube opposite the seals. It usually only helps to completely remove the bearing bushes, the seals and the swivel tube.
  • This design of the swivel switch enables a controlled addition of lubricating grease without grease escaping from the bearing points into the concrete to be pumped or into the environment. Rather, the excess grease is removed from the bearing points via the grease discharge lines.
  • the resistance devices in the grease discharge lines can be used to measure the pressure in the bearing points so that the risk of fine concrete particles entering is reduced.
  • the bearing points are otherwise closed, so that a pressure drop due to escaping grease is prevented. If fine parts of the concrete should nevertheless get into the bearing points, this would be noticed in the form of contaminated grease emerging from the grease discharge lines.
  • the swivel switch could be easily repaired by simply replacing the seals without the need to replace the complete swivel tube.
  • DE-AS 27 00 800 has already described a control slide in which discharge lines are provided for a detergent.
  • the fluctuating pressure in the bearing points and the structure of the slider do not prevent concrete particles from entering the bearing points. Rather, they are there concrete particles adhering to the slide rods and inevitably entering the bearing points are rinsed off.
  • the axis of rotation of the swivel tube can coincide with the axis of the discharge end of the S-shaped swivel tube, and a fixed delivery tube can be connected to the discharge end of the swivel tube, which is sealed on the end face with a grease-lubricated mechanical seal relative to the discharge end of the swivel tube, whereby the mechanical seal has two mutually opposite and mutually rotatable sliding rings, each with an end-facing, circumferential ring channel and radial feed and discharge channels, which are also connected to grease supply and grease discharge lines. This also prevents grease from escaping at the transition point of the swivel tube to the subsequent delivery tube.
  • the bush bearings are double-sealed against the interior of the concrete suction housing by providing a first shaft seal axially behind a slide bearing bush, a grease-filled circulation groove behind it and finally a second shaft seal facing the concrete.
  • the second shaft seal is a sealing ring made of an elastomer, the sealing edge of which faces the interior of the concrete suction housing. This has the advantage that the outer edge of the shaft sealing ring facing the concrete forms the actual sealing lip, so that it is hardly possible for fine parts of the concrete to pull into a gap between the seal and the shaft.
  • the slide bearing bushing is connected to the circulation groove in each case on its own grease supply and grease discharge line.
  • This allows the grease pressures in the slide bearing bush on the one hand and the circulation groove on the other hand to be set individually, so that, for example, a relatively high grease pressure can be set in the slide bearing bush while the grease pressure in the circulation groove is relatively low, so as to prevent grease from outside the depository.
  • the resistance devices in the grease discharge lines can be constructed in a structurally simple manner as adjustable pressure relief valves, it not being absolutely necessary that such an adjustment can be made during operation; as a rule, the setting is specified constructively.
  • the grease gun can be motor-driven and deliver the grease essentially continuously to the individual bearing points. Since the excess fat is discharged via the fat discharge lines, such a continuous delivery is only possible without Grease can leak into the concrete.
  • a swivel gate for a double-piston concrete pump is shown.
  • the double-piston concrete pump comprises two such pump cylinders 2 and 2 ', in each of which a piston, not shown for the sake of clarity, is guided to move back and forth.
  • the two pistons are coupled together so that when one piston makes a forward stroke, the other piston moves backward.
  • An S-shaped pivot tube 4 is pivotally mounted in the concrete suction housing about an axis of rotation 3, which is arranged parallel to the axes of the pump cylinders.
  • the mechanical seal consists of two axially opposite sliding rings 11 and 12, each of which has a circumferential ring channel on the facing end faces, from which feed and discharge channels extend radially outwards. For the sake of clarity, these channels are not shown. They are filled with fat, which is fed via a fat feed line 13 and discharged via a fat discharge line 14.
  • FIG. 3 shows the basic structure of the second bearing with the bearing bush 9.
  • a circumferential plain bearing bush 15 is formed in the bearing bush.
  • a shaft sealing ring 16 for example an O-ring, is provided to the right of the slide bearing bush.
  • a shaft sealing ring 17 can also be provided to the left of the slide bearing bush.
  • the shaft sealing ring 19 is a so-called grooved ring which has a circumferential groove on its right-facing end face, so that the lower leg of the shaft sealing ring forms a sealing lip with the outer edge 20 relative to the shaft 8.
  • To the right of the jack is the Interior of the concrete intake housing.
  • a grease supply line 13 ' is connected to the slide bearing bush 15 and a grease supply line 13' 'is connected to the groove.
  • a grease supply line 13 '' ' is also connected to the first bearing point 5. All of these grease supply lines 13 to 13 '' 'come from a grease distributor device 21 which distributes the grease flow arriving from a motor-driven grease gun 22 to the individual lubrication or bearing points.
  • grease discharge lines 14 to 14 ′′ are provided on the opposite side of the bearing points, which open into a common grease collection container 23.
  • Overpressure valves 25 are provided in the grease discharge lines, which are adjustable in such a way that a desired pressure can always be maintained in the slide bearing bushes or grooves or ring channels.
  • each lubrication point that is to say each slide bearing bush and each groove, can be assigned a separate grease discharge line 14 in a favorable manner.
  • sight glasses can be provided in the discharge lines.
  • the interior 24 of the concrete suction housing is filled with concrete.
  • the concrete suction housing 1 is usually located at the lower end of a concrete hopper or the like.
  • the swivel tube 4 is swiveled in front of the pump cylinder which is just ejecting concrete, while the other pump cylinder sucks in concrete from the concrete suction housing. This means that with each stroke of the double-piston pump, the swivel tube is swiveled from one pump cylinder 2 to the other pump cylinder 2 'and vice versa.
  • the pivot tube or shaft 8 moves in the bearing bushes 6 and 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP92108241A 1991-05-17 1992-05-15 Distributeur oscillant pour une pompe à béton à deux pistons Withdrawn EP0519217A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914116247 DE4116247C1 (fr) 1991-05-17 1991-05-17
DE4116247 1991-05-17

Publications (1)

Publication Number Publication Date
EP0519217A1 true EP0519217A1 (fr) 1992-12-23

Family

ID=6431925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108241A Withdrawn EP0519217A1 (fr) 1991-05-17 1992-05-15 Distributeur oscillant pour une pompe à béton à deux pistons

Country Status (2)

Country Link
EP (1) EP0519217A1 (fr)
DE (1) DE4116247C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102383605A (zh) * 2011-11-24 2012-03-21 三一重工股份有限公司 混凝土机械的润滑系统及混凝土机械
CN105328066A (zh) * 2015-11-30 2016-02-17 无锡艾度科技有限公司 一种便于维护的冲压搬运智能机器人

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7238299B2 (en) * 2002-11-01 2007-07-03 Honeywell International Inc. Heat transfer fluid comprising difluoromethane and carbon dioxide
DE102008059409A1 (de) * 2008-11-27 2010-06-02 Putzmeister Concrete Pumps Gmbh Fahrbare Arbeitsmaschine mit Notschmiersystem
CN101915237B (zh) * 2010-09-14 2012-05-23 三一重工股份有限公司 混凝土输送泵润滑系统及混凝土泵送设备
DE102013208101A1 (de) * 2013-05-03 2014-11-20 Putzmeister Engineering Gmbh Behälter zur Aufnahme von Dickstoffen
DE102013114008A1 (de) * 2013-12-13 2015-06-18 MPS-Matter Pumpsysteme GmbH Dickstoffpumpvorrichtung, insbesondere für eine fahrbare Dickstoffpumpe
DE102014000197A1 (de) 2014-01-14 2015-07-16 Schwing Gmbh Lagerung einer drehenden Welle mit Dichtring

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700800A1 (de) * 1977-01-11 1978-07-13 Herbert Kuhlmann Steuerschieber fuer einzylinder- und zweizylinder-kolbenpumpen zum foerdern von beton
DE3009746A1 (de) * 1980-03-14 1981-10-01 Stetter Gmbh, 8940 Memmingen Steuerschieber einer betonpumpe
EP0052192A1 (fr) * 1980-11-14 1982-05-26 Stetter GmbH Dispositif pour pompes à béton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700800A1 (de) * 1977-01-11 1978-07-13 Herbert Kuhlmann Steuerschieber fuer einzylinder- und zweizylinder-kolbenpumpen zum foerdern von beton
DE3009746A1 (de) * 1980-03-14 1981-10-01 Stetter Gmbh, 8940 Memmingen Steuerschieber einer betonpumpe
EP0052192A1 (fr) * 1980-11-14 1982-05-26 Stetter GmbH Dispositif pour pompes à béton

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102383605A (zh) * 2011-11-24 2012-03-21 三一重工股份有限公司 混凝土机械的润滑系统及混凝土机械
CN102383605B (zh) * 2011-11-24 2013-10-23 三一汽车制造有限公司 混凝土机械的润滑系统及混凝土机械
CN105328066A (zh) * 2015-11-30 2016-02-17 无锡艾度科技有限公司 一种便于维护的冲压搬运智能机器人

Also Published As

Publication number Publication date
DE4116247C1 (fr) 1992-10-15

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