CN101883940B - Concrete pump with piston lubrication - Google Patents
Concrete pump with piston lubrication Download PDFInfo
- Publication number
- CN101883940B CN101883940B CN200880119030.7A CN200880119030A CN101883940B CN 101883940 B CN101883940 B CN 101883940B CN 200880119030 A CN200880119030 A CN 200880119030A CN 101883940 B CN101883940 B CN 101883940B
- Authority
- CN
- China
- Prior art keywords
- piston
- lip
- conveyor
- conveyor piston
- dorsal part
- 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 - Fee Related
Links
- 238000005461 lubrication Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000005060 rubber Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001970 hydrokinetic effect Effects 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to a piston pump for delivering concrete or the like, having at least one delivery cylinder (1) and one delivery piston (3) which can be moved axially in the delivery cylinder (1) and is connected to a drive (5) via a piston rod (4), wherein the delivery piston (3) has, on its front side (7) which faces the concrete and on its rear side (8) which is rinsed with water, in each case a circumferential lip (9, 10) which bears against the inner wall of the delivery cylinder (1). In order to achieve effective water lubrication in a piston pump of this type, the invention proposes that the rear-side lip (10) has, at its circumferential edge, at least one recess (11), through which water passes from the rear side of the delivery piston (3) into the intermediate space (12) between the lips (9, 10). Moreover, the invention relates to a delivery piston (3) for a piston pump of this type.
Description
Technical field
The present invention relates to a kind of reciprocating pump being used for delivering concrete etc., its conveyor piston that there is at least one conveying cylinder and can move axially in conveying cylinder, described conveyor piston is connected with drive unit by piston rod, wherein said conveyor piston it have respectively on concrete front side and on its dorsal part washed away by water one around lip, described lip be close to conveying cylinder inwall on.
Background technique
The reciprocating pump of known delivering concrete for a long time on building sites.Usually, they are designed to hydraulically powered reciprocating pump (great majority are twin-tubs), and wherein concrete is carried by flexible pipe or pipe.
Having in the concrete piston pump of two linear conveying cylinders in routine, in order to drive the drive cylinder they utilizing two hydraulic pressure, their piston is individually rigidly connected respectively with the conveyor piston of conveying cylinder by piston rod.At this, the conveying cylinder great majority of known reciprocating pump be push-pull mode drive, namely their conveyor piston alternately carries out filling stroke and delivery stroke.At this, concrete is transferred to the pump chamber of conveying cylinder from concrete-conveyor piston lining, and is transported in unique conveyance conduit from this pump chamber.This conveyance conduit is connected by the pump chamber of pipe adapter with conveying cylinder, and wherein conveyance conduit alternately carries cylinder to be connected with two by this pipe adapter in the beat of delivery stroke.
In the concrete-reciprocating pump of the above-mentioned type, conveyor piston directly contacts with concrete to be conveyed.In concrete pump, piston seal will stand very high stress, and suffers corresponding wearing and tearing.In order to reduce the wearing and tearing on conveyor piston, and in order to reduce the wearing and tearing on the inwall contacted with conveyor piston carrying cylinder, it is known that carry out water lubrication to conveying cylinder in concrete pump after piston.In the concrete pump of routine, between conveying cylinder and its hydraulic drive cylinder, be provided with a water tank run through by piston rod, it carries cylinder to be connected with two.When pump operation, the water being arranged in water tank rocks back and forth at two conveying cylinders, and at this, water is washed on the dorsal part of conveyor piston.By water, realize conveyor piston and lubricate and conveying cylinder is cooled.By these measures, can significant prolongation conveyor piston and the working life of carrying cylinder.
In known concrete-reciprocating pump, conveyor piston as piston seal usually have two around lip.Therefore, realize the sealing relative to the concrete side of conveyor piston on the one hand, realize the sealing relative to the water side of conveyor piston on the other hand.Not only the water realized by water tank is washed away and has extra function, dissolves and washes out and may pass when sealing lip and damage
concrete.The concrete overflowed due to the final inevitably blow-by of conveyor piston, can deposit, and (such as when changing water) removes from water tank termly in water tank.
Along with further research and development, the requirement of the transmission power of concrete pump is also improved constantly.In nearest ten years, the average quantity delivered required by each hour improves more than 50%.First transporting velocity is improved by correspondingly improving the movement velocity of conveyor piston in conveying cylinder.Its negative consequence is, along with the rising of transporting velocity, the wearing and tearing on conveyor piston are also exceedingly risen.The durability of conveyor piston is also unacceptablely short.In region on piston leading guide face between two sealing lips, there is badly damaged sealing lip and striped in conveyor piston ahead of time.
From the known a kind of conveyor piston for concrete pump of DE 10 20,058 032 916 A1, in order to improve water lubrication, in conveyor piston, be provided with connecting passage, be used for water to be directed to the intermediate cavity between two sealing lips from the cylinder chamber after conveyor piston.Previously known conveyor piston by following metal piston body and surround partly piston body, the lining be made up of rubber forms.Being used for the connecting passage of water filling is configured to the penetration hole in rubber lining.In practice, test is not lived through by the conveyor piston that above-mentioned document is known.The fact shows, when concrete pump runs, in the intermediate cavity not having enough water to be transported between two sealing lips in the rubber lining of piston by connecting passage.Because the outer surface of conveyor piston has very high extruding force on the inwall of conveying cylinder, the cross section of the connecting passage formed in the rubber lining of elastically deformable narrows.In addition, also concrete residue is slightly added in connecting passage.It is that this causes as a result, relative to the traditional conveyor piston for concrete pump, the durability of this piston is not improved significantly.
Summary of the invention
Before this background, the object of the invention is, a kind of reciprocating pump being used for delivering concrete of further improvement is provided.Relative to traditional system, the working life of this conveyor piston should obviously extend.
This object from the outset reciprocating pump of described type is set out and is realized the present invention like this, that is: the lip of dorsal part has at least one groove on its circumferential edges, and water can enter into intermediate cavity between lip from the dorsal part of conveyor piston by this groove.
The present invention is based on unexpected understanding, that is: the durability of piston is by improving significantly with under type, namely seals in lip on the dorsal part being arranged on piston and arranges groove.As mentioned above, piston around lip be used on the one hand towards the sealing between concrete pistons front sides and the piston dorsal part washed away by water.On the other hand, described lip is used for concrete residue is come off from the inwall of conveying cylinder.From first soon, in the dorsal part lip of conveyor piston, this function is limited by groove of the present invention.But surprisingly, due to the groove in lip, the surface of contact now between piston and the inside wall of cylinder achieves effective water filling.In traditional concrete-reciprocating pump, the sealing lip on the water side of conveyor piston can wipe the moisture film on the conveying inside wall of cylinder, therefore can cause the piston guide of anhydrous (that is unlubricated) more or less.Lack oiling agent in scope due to the surface of contact between conveyor piston and the inside wall of cylinder, there will be serious wear phenomenon, therefore do not reoffer sealing and the cleaning function of piston very soon.By by the structural scheme at dorsal part with the conveyor piston of the lip of interruption of the present invention, ensure to there is moisture film all the time in the scope of piston leading guide face.Therefore, reduce the friction between conveyor piston and conveying casing wall significantly, and make the working life that conveyor piston reaches longer, and therefore reach higher durability.And than in piston durability obviously higher in known systems, moisture film with on the concrete side of piston around piston seal together with ensure enough sealings, and ensure that concrete residue comes off from casing wall effectively.
Because by the present invention, to the intermediate cavity water-filling between the lip of conveyor piston, there because the relative movement between conveyor piston and conveying casing wall can produce the effect of hydraulic power.Produce water conveying effect thus, its ensures by the groove in the dorsal part lip of conveyor piston, constantly changes the water imported to lubricate in intermediate cavity when pump operation.Therefore be flushed in the intermediate cavity between sealing lip enduringly, thus advantageously realize dissolving and washing out the concrete that may enter in intermediate cavity.Also can reduce wear thus and extend working life of conveyor piston.
Advantageously can be configured to pumps in series in the ordinary way by reciprocating pump of the present invention, the conveying cylinder of wherein two push-pull mode work is connected with each other by water tank, and this water tank is run through by the piston rod of two conveying cylinders.When by pump operation of the present invention, water rocks back and forth between conveying cylinder, and ensures the lubrication of piston leading guide face with above-mentioned mode and method and wash away.In this structural scheme, conform with object, two hydraulic drive cylinders be connected with piston rod are used as the drive unit of pump, and it is configured to double-acting differential cylinder and push-pull mode ground driven plunger, is used for alternately implementing to fill and delivery stroke.
Object of the present invention is also achieved by the conveyor piston for reciprocating pump, and this conveyor piston has an adpting flange on its dorsal part, is used for being connected with piston rod.Conveyor piston have respectively on its front side and on its dorsal part one around lip.By the present invention, the lip of dorsal part has at least one groove on its circumferential edges, and water enters into intermediate cavity between lip, to realize the better water lubrication of piston leading guide face by this groove from the dorsal part of conveyor piston.Preferably, by the dorsal part lip of conveyor piston of the present invention, there is on its circumferential edges two or more evenly spaced groove in a circumferential direction.By this way, piston leading guide face is made circumferentially to realize uniform water-filling whole.Especially proved effectively, there are four with the structure of the symmetry of the groove of 90 ° of angle intervals.
Advantageously, concrete-reciprocating pump that such conveyor piston can be used to having existed is retrofited.For this need change traditional conveyor piston with by conveyor piston of the present invention.This can realize without any problems, because conveyor piston has the adpting flange that an energy is removably connected with piston rod.
The structure of following conveyor piston has been proved to be effective especially, that is: conveyor piston by metal piston body and at least local envelopment piston body, the conveyor piston lining be made up of rubber forms, wherein lip is molded and shaped on conveyor piston lining.Piston body and the adpting flange being used for being connected with piston rod of metal are integrally constituted.The rubber material of conveyor piston lining makes piston seal have good performance in sealing and wearing and tearing.By in conveyor piston of the present invention, certainly fully wearing and tearing can not be eliminated.The elastic performance of the rubber material of conveyor piston lining can ensure when wearing and tearing further, piston seal to be worked as far as possible for a long time.
By especially practical deformation program of the present invention, at least one groove described is configured to the recess substantially in circular arc in the region of dorsal part lip in conveyor piston lining.Thus such groove also can be arranged inexpensively with very little cost.
Accompanying drawing explanation
Illustrating in detail embodiments of the invention with reference to the accompanying drawings.Wherein:
Fig. 1 illustrates the side view by reciprocating pump of the present invention;
Fig. 2 illustrates the cross section A-A of the part along the pump shown in Fig. 1;
Fig. 3 illustrates the detailed view of the local of Fig. 2;
Fig. 4 illustrates the 3-D view by conveyor piston of the present invention.
Embodiment
Fig. 1 to 3 shows the concrete-reciprocating pump of twin-tub, and it has the conveying cylinder 1 of two push-pull mode work, and they are connected with each other by water tank 2.In each conveying cylinder 1, conveyor piston 3 can be guided with axial motion.Described conveyor piston 3 is connected with the drive cylinder 5 of hydraulic pressure by piston rod 4.Described piston rod 4 is through water tank 3.The conveying cylinder 1 opened wide forward leads in concrete feeding container 5.By that be not shown specifically, controllable pipe adapter (Rohrweiche), the pump chamber of conveying cylinder 1 is alternately connected with the same conveyance conduit be not shown specifically.
Fig. 3 shows the local marked with circle in Fig. 2 enlargedly.Can find out in figure 3, conveyor piston 3 on front side of it (namely at concrete side 7) and have respectively on its dorsal part (namely in water side 8) one around lip 9 or 10.Described lip 9 and 10 is close on the inwall of conveying cylinder 1.By the present invention, the lip 10 of dorsal part has groove 11 on its circumferential edges, and water enters into intermediate cavity 12 between lip 9 and 10 by described groove 11 from the dorsal part (namely from the cylinder chamber 8 after conveyor piston 3) of conveyor piston.In contrast, the lip 9 of front side is configured to link up.By groove 11, supply water with method to intermediate cavity 12 in the above described manner, therefore form uniform moisture film there.Thus, reduce the friction between conveyor piston 3 and casing wall 1, and reduce the wearing and tearing of conveyor piston 3.Because piston 3 moves in cylinder 1, can produce hydrokinetic effect in the intermediate cavity 12 being filled with water, this ensures to change lubrication water constantly, and rinses intermediate cavity 12 with water constantly.
Fig. 4 shows the 3-D view by conveyor piston of the present invention.In the diagram, the dorsal part of piston 3 can be found out well the groove 11 in lip 10.Shown piston 3 comprises the piston body 13 of metal, and on described piston body 13, molded and shaped one is used for the adpting flange 14 be connected with piston rod 4.As shown in Figure 2, together with piston 3 to be tightened on intermediate member 15 by adpting flange 14.Described intermediate member 15 is connected with piston rod 4 again.In order to change piston, unclamp being threaded of intermediate member 15 and piston 3 and piston rod 4.Subsequently, intermediate member 15 and piston 3 can be taken off via water tank 3.The piston body 13 of conveyor piston is surrounded by the conveyor piston lining 16 be made up of rubber partly.As shown in Figure 3, lip 9 and 10 is molded and shaped on conveyor piston lining 16.Hardness is that the so-called nitrile butadiene rubber of 70-80 Shore A has been proved to be the material be suitable for as conveyor piston lining 16.As shown in Figure 3, by the present invention, four grooves 11 are formed with the angle intervals of 90 °, are used for the intermediate cavity water-filling in the rubber body of conveyor piston lining 16.In the scope of piston leading guide face, produce uniform water lubrication film by this way.
Reference numerals list
1 conveying cylinder
2 water tanks
3 conveyor pistons
4 piston rods
5 drive cylinders
6 concrete feeding containers
The front side of 7 concrete sides=conveyor piston
The dorsal part of 8 water side=conveyor pistons
Lip on front side of in the of 9
The lip of 10 dorsal parts
11 grooves
12 intermediate cavity
13 piston bodies
14 adpting flanges
15 intermediate members
16 conveyor piston linings
Claims (9)
1. one kind is used for the reciprocating pump of delivering concrete etc., the conveyor piston (3) comprising at least one conveying cylinder (1) and can move axially in this conveying cylinder (1), described conveyor piston (3) is connected with drive unit (5) by piston rod (4), wherein said conveyor piston (3) it towards concrete front side (7) upper and have respectively on its dorsal part (8) washed away by water one around lip (9, 10), described lip is close on the inwall of conveying cylinder (1), it is characterized in that, the lip (10) of dorsal part has at least one groove (11) on its circumferential edges, water enters into lip (9 by described groove from the dorsal part of conveyor piston (3), 10) in the intermediate cavity (12) between.
2. by reciprocating pump according to claim 1, it is characterized in that, the lip (10) of described dorsal part has two or more evenly spaced grooves (11) each other in a circumferential direction.
3. by the reciprocating pump described in claim 1 or 2, it is characterized in that, conveying cylinder (1) is connected with water tank (2), and described water tank (2) is run through by piston rod (4).
4. by reciprocating pump according to claim 3, it is characterized in that, reciprocating pump is configured to the pumps in series of the conveying cylinder (1) with two push-pull mode work, and wherein two conveyings cylinder (1) are connected with each other by water tank (2).
5. by reciprocating pump according to claim 4, it is characterized in that, the piston rod (4) of described two conveyings cylinder (1) is connected with the drive cylinder (5) of a hydraulic pressure respectively.
6. the conveyor piston for reciprocating pump, described reciprocating pump is used for delivering concrete etc., described conveyor piston comprise be arranged on conveyor piston (3) dorsal part (8) on adpting flange (14), be used for being connected with piston rod (4), wherein conveyor piston (3) it front side (7) and have respectively on its dorsal part (8) one around lip (9, 10), it is characterized in that, the lip (10) of dorsal part has at least one groove (11) on its circumferential edges, water enters into lip (9 by described groove (11) from the dorsal part of conveyor piston (3), 10) in the intermediate cavity (12) between.
7. by conveyor piston according to claim 6, it is characterized in that, the lip (10) of dorsal part has two or more evenly spaced groove (11) each other in a circumferential direction.
8. by the conveyor piston described in claim 6 or 7, it is characterized in that, conveyor piston (3) by metal piston body (13) and surround piston body (13) at least partly, the conveyor piston lining (16) be made up of rubber forms, wherein lip (9,10) is molded and shaped on conveyor piston lining (16).
9., by conveyor piston according to claim 8, it is characterized in that, described at least one groove (11) is configured to the recess of circular arc in the region of the lip (10) of dorsal part in conveyor piston lining (16).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007050279.8 | 2007-10-18 | ||
| DE200710050279 DE102007050279B3 (en) | 2007-10-18 | 2007-10-18 | Concrete pump with piston lubrication |
| PCT/EP2008/008823 WO2009053005A1 (en) | 2007-10-18 | 2008-10-17 | Concrete pump with piston lubrication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101883940A CN101883940A (en) | 2010-11-10 |
| CN101883940B true CN101883940B (en) | 2014-12-31 |
Family
ID=40227183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880119030.7A Expired - Fee Related CN101883940B (en) | 2007-10-18 | 2008-10-17 | Concrete pump with piston lubrication |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101883940B (en) |
| DE (1) | DE102007050279B3 (en) |
| TR (1) | TR201003064T1 (en) |
| WO (1) | WO2009053005A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042217B (en) * | 2010-09-19 | 2013-03-13 | 中联重科股份有限公司 | Piston lubricating system for concrete cylinder |
| CN102536790B (en) * | 2012-02-08 | 2015-04-01 | 三一汽车制造有限公司 | Concrete-piston structure, pumping system and concrete pump |
| CN102661274B (en) * | 2012-02-08 | 2015-01-07 | 三一重工股份有限公司 | Concrete piston structure, pumping system and concrete pump |
| DE102012211280A1 (en) * | 2012-06-29 | 2014-01-02 | Putzmeister Engineering Gmbh | Piston pump for conveying thick material |
| DE102012214740A1 (en) * | 2012-08-20 | 2014-02-20 | Putzmeister Engineering Gmbh | Piston pump for conveying thick material |
| DE102018120582A1 (en) * | 2018-08-23 | 2020-02-27 | Schwing Gmbh | Piston pump for thick matter with water tank |
| CN114458590A (en) * | 2022-02-14 | 2022-05-10 | 内蒙古晨德建设工程有限公司 | Concrete cylinder structure of paste delivery pump and reversing control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005032916A1 (en) * | 2005-07-12 | 2007-01-18 | Schwing Gmbh | Concrete pump, with a piston moving axially in a cylinder, has a channel to carry water from behind the piston into the space between sealing lips for piston lubrication |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB895070A (en) * | 1959-11-04 | 1962-04-26 | Otto Max Kastner | Improvements in or relating to piston pumps |
| FR1279472A (en) * | 1960-11-10 | 1961-12-22 | Piston seal for slurry pumps, especially for oil exploration installations | |
| US3279383A (en) * | 1965-01-06 | 1966-10-18 | Burnup And Sims Inc | Hydraulic powered mobile concrete pump assembly |
| US4270440A (en) * | 1979-02-22 | 1981-06-02 | Weatherford/Dmc | High pressure piston and seal |
| JPS6131677A (en) * | 1984-07-25 | 1986-02-14 | Kyokuto Kaihatsu Kogyo Co Ltd | Cleaning of piston type concrete pump |
| KR100447455B1 (en) * | 2001-07-30 | 2004-09-07 | 삼영기계주식회사 | Piston for two cycle engine |
| DE10343802B4 (en) * | 2003-09-22 | 2007-12-06 | Schwing Gmbh | Piston slurry pump with continuous flow |
-
2007
- 2007-10-18 DE DE200710050279 patent/DE102007050279B3/en not_active Expired - Fee Related
-
2008
- 2008-10-17 WO PCT/EP2008/008823 patent/WO2009053005A1/en active Application Filing
- 2008-10-17 CN CN200880119030.7A patent/CN101883940B/en not_active Expired - Fee Related
- 2008-10-17 TR TR2010/03064T patent/TR201003064T1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005032916A1 (en) * | 2005-07-12 | 2007-01-18 | Schwing Gmbh | Concrete pump, with a piston moving axially in a cylinder, has a channel to carry water from behind the piston into the space between sealing lips for piston lubrication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101883940A (en) | 2010-11-10 |
| DE102007050279B3 (en) | 2009-02-12 |
| TR201003064T1 (en) | 2010-11-22 |
| WO2009053005A1 (en) | 2009-04-30 |
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| C53 | Correction of patent of invention or patent application | ||
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Address after: City of Germany Applicant after: SCHWING GmbH Address before: Black German Applicant before: SCHWING GmbH |
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Granted publication date: 20141231 |