EP2042730A2 - Unité de compensation d'alimentation améliorée - Google Patents

Unité de compensation d'alimentation améliorée Download PDF

Info

Publication number
EP2042730A2
EP2042730A2 EP08164843A EP08164843A EP2042730A2 EP 2042730 A2 EP2042730 A2 EP 2042730A2 EP 08164843 A EP08164843 A EP 08164843A EP 08164843 A EP08164843 A EP 08164843A EP 2042730 A2 EP2042730 A2 EP 2042730A2
Authority
EP
European Patent Office
Prior art keywords
plaster
compensation unit
chamber
delivery
unit according
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Withdrawn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
EP08164843A
Other languages
German (de)
English (en)
Other versions
EP2042730A3 (fr
Inventor
Diego Revelin
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.)
Revelin Evaristo & Figli SNC
Original Assignee
Revelin Evaristo & Figli SNC
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 Revelin Evaristo & Figli SNC filed Critical Revelin Evaristo & Figli SNC
Publication of EP2042730A2 publication Critical patent/EP2042730A2/fr
Publication of EP2042730A3 publication Critical patent/EP2042730A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
    • B28C7/163—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • 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

Definitions

  • the present invention concerns an improved delivery compensation unit, particularly suited to be employed in plaster sprayers used in the building industry for the finishing and restoration of walls.
  • plastering process requires the spreading, on the surface of the wall to be treated, of a mixture consisting of lime, sand and other substances, in order to create a smooth protective layer to which paints of different types can be applied.
  • plastering process can be carried out either manually or using spraying devices that in fact are called "plaster sprayers”.
  • Said plaster sprayers comprise a spray gun that the operator uses to direct the plaster toward the wall and a tank connected to the gun and containing the plaster.
  • the plaster sprayer comprises a power unit that is equipped with a motor suited to transmit motion to a plaster pumping unit and set rotating a compressor that supplies the compressed air used for spraying.
  • the pumping unit comprises a plunger operated by a connecting rod that sucks plaster from the tank to convey it into a suction chamber and successively compresses it in a compression chamber that is connected to the suction chamber through valve means provided therein.
  • the operation of the plunger generates alternate compression and suction phases, so that the plaster is first made flow from the tank to the suction chamber and then to the compression chamber, from which it is conveyed towards the outlet pipe.
  • the compressed air reaches the spray gun and facilitates spraying thanks to the Venturi effect.
  • the drawback posed by the plaster sprayers of the type described, belonging to the known art, lies in that, due to the alternate motion of the plunger and therefore to the succession of the suction and compression phases, delivery of the plaster is not constant.
  • pneumatic delivery compensation units which consist of a compensation chamber positioned immediately above the compression chamber and filled with compressed air, through a pipe connected to the compressor.
  • An on-off valve allows or prevents air supply to the compensation chamber.
  • part of the plaster flows into the compensation chamber so that, on the successive suction phase, the plaster accumulated in the compensation chamber flows towards the spray gun, in such a way as to ensure a certain regularity in the delivery of plaster.
  • Said compensation unit in fact, makes it possible to compensate for the failed delivery of plaster during the suction phase by keeping the outflow of plaster as constant as possible.
  • Figure 2 related to the known art, which shows the plaster outflow from a plaster sprayer provided with compensation unit, and where it is possible to see that said outflow is more regular due to the delivery of the plaster accumulated in the compensation chamber during the plunger suction phase, as shown also by the area indicated by B .
  • the compensation unit described above poses some drawbacks that are substantially due to the fact that it is pneumatic.
  • a first drawback lies in that the presence of a pressurised chamber increases the dangerousness of the plaster sprayer, above all in the case where the air present in said compression chamber reaches particularly high pressure values.
  • Another drawback lies in that if, upon starting the machine, the operator forgets to open the valve that feeds air to the compensation chamber, on the first pumping cycle this will be completely filled with plaster and therefore will not be able, during the following cycle, to carry out its function, i.e. ensure a compensation effect.
  • a further drawback is represented by the fact that it is impossible to position an overflow valve in the compensation chamber in order to be able, in case of need, to discharge the excess plaster accumulated therein, for example in case of clogging downstream of the spray pipe.
  • the present invention intends to overcome the drawbacks listed above.
  • Another object of the invention is to provide a delivery compensation unit in which the plaster flow compensation pressure can be easily regulated.
  • the introduction of the delivery compensation unit that is the subject of the invention makes the plaster sprayer more reliable because it is less subject to stops than the pneumatic compensation units of known type.
  • the delivery compensation unit that is the subject of the invention can be installed also in plaster sprayers provided with a pneumatic compensation unit.
  • the objects and advantages described above will be highlighted in greater detail in the description of a preferred embodiment of the invention that is supplied as an indicative, non-limiting example, with reference to the enclosed drawings, wherein:
  • the delivery compensation unit that is the subject of the invention can be seen in its whole in Figures 3 e 4 , where it is shown in an axonometric view and indicated by 1 , and also in Figure 5 , in a longitudinal view.
  • delivery compensation unit 1 that is the subject of the invention can also be installed in plaster sprayers different from those illustrated in the drawings and described here below.
  • the plaster sprayer 2 As regards the plaster sprayer 2 , it can be observed that it comprises a frame 3 that supports a tank 4 containing the plaster I to be sprayed and a power unit 5 for operating a pumping unit, indicated as a whole by 6, for conveying the plaster I from the tank 4 to a spray gun, not represented herein, through an outlet pipe 7 .
  • it comprises the motor 5a that sets the plunger 9 moving according to a rectilinear alternate motion through a belt 5b and a connecting rod-crank assembly 5c and sets a compressor 5d rotating through a second belt. This generates the compressed air that is used for spraying.
  • the cylinder 8 communicates with a suction chamber 6a that in turn communicates with an underlying accumulation chamber 6c connected to the bottom of the tank 4 through a pipe 11 .
  • First valve means constituted by a first ball 13b , allow opening and closing of the first way 12 that places the accumulation chamber 6c in communication with the suction chamber 6a .
  • the suction chamber 6a in turn communicates with an overlying compression chamber 6b through second valve means that comprise a second ball 13a that opens and closes the second communication way 14 between the two chambers.
  • the delivery compensation unit 1 comprises a cylindrical container 19 closed at one end by a bottom 20 and communicating with the compression chamber 6b through an inlet mouth 21 , as shown in Figure 6 , so that the plaster I , when pushed by the compression generated by the plunger 9 in the compression chamber 6b , flows also towards the compensation chamber 22 defined by the cylindrical container 19 itself.
  • the delivery compensation unit 1 is also provided with a plunger 23 with rod 23a slidingly coupled in the compensation chamber 22 whose movement along the longitudinal axis y defined by the chamber itself is regulated via elastic mechanical means 24 interposed between the plunger 23 and the bottom 20 , coaxially to the rod 23a , as shown in Figure 5 .
  • the elastic mechanical means 24 comprise a helical spring 25a with elastic constant selected by the operator in order to exert a controlled and predetermined thrusting action on the plunger 23 .
  • the elastic means can be constituted by two springs, more precisely one external spring 25b and one internal spring 25c , which are coaxial to each other and have different elastic constants and lengths, in such a way as to start operating at successive moments during the movement of the plunger 23 .
  • the elastic means can be constituted by Belleville washers 25d .
  • the elastic means 24 can be elastomers.
  • the elastic means 24 can be of any type and have a diversified distribution, provided that they are mechanical.
  • the delivery compensation unit 1 that is the subject of the invention preferably but not necessarily comprises a drain way 26 created in the cylindrical container 19 at such a height that it is included between the plunger 23 and the bottom 20 of the container itself, at a height above the top dead center of the plunger 23 in normal operating conditions.
  • This drain way 26 is also connected to the tank 4 through a drain pipe 27 so that the plaster I flows back towards the tank if the plunger 23 slides beyond the set dead center, which indicates the presence of a greater quantity of plaster I in the compensation chamber 22 than would be correct in normal operating conditions.
  • the drain way 26 and the drain pipe 27 behave as an "overflow" system which is arranged by the manufacturer in such a position that the opening of the drain way 26 is left free when the plunger 23 exceeds a given height.
  • the bottom 20 it comprises a disc that is removably connected to the cylindrical container 19 through a suitable thread or through screws or another fixing means.
  • This structure facilitates the cleaning of the inside of the cylindrical container and the removal of the plunger 23 and of the elastic mechanical means 24 when necessary.
  • the bottom 20 can be welded to the cylindrical container 19 , in which case it must be possible to remove the whole cylindrical container 19 by means of a flange at the level of the inlet mouth 21 .
  • valve means positioned between the suction chamber 6a and the compression chamber 6b and between the suction chamber 6a and the accumulation chamber 6c are balls, indicated respectively by 13a and 13b .
  • Figure 8a shows the plaster sprayer 2 at rest, with the plunger 9 at the front dead center and the tank 4 filled with plaster I up to the desired level and with the accumulation chamber 6c filled with plaster I , too.
  • the maximum quantity of plaster I that can accumulate inside the suction chamber 6a corresponds to the volume of the cylinder 8 in which the plunger 9 moves and varies according to the position of the unit that regulates the connecting rod-crank assembly 5c .
  • the plunger 9 resumes its forward movement in the direction indicated by the arrow in Figure 8d and compresses the plaster I present in the suction chamber 6a making it flow, as indicated in the figure, into the compression chamber 6b , since its thrusting action lifts the ball valve 13a , opens the second communication way 14 and closes the ball valve 13b .
  • the plaster I flows also through the delivery way 15 and then into the outlet pipe 7 and is finally delivered through the spray gun.
  • the delivery compensation unit 1 that is the subject of the invention carries out the first step of its task, that is, lifts the plunger 23 that is moved upward by the thrust of the plaster pumped towards the bottom 20 , thus compressing the elastic mechanical means 24 .
  • the maximum height reached by the plunger 23 corresponds to the maximum pressure exerted on it by the plaster I , which is counterbalanced by the load of the elastic means 24 .
  • the delivery compensation unit 1 of the invention installed on the plaster sprayer 2 allows the set objects to be achieved.
  • the invention achieves the object to provide a delivery compensation unit that makes it possible to maintain a constant plaster flow during the spraying operation.
  • the invention also achieves the object to provide a delivery compensation unit that is activated automatically upon starting of the machine and that does not need any intervention by the operator as is the case with plaster sprayers provided with pneumatic compensation units where, in order to prevent the compensation unit from stopping, the operator needs to open the air supply valve.
  • the invention also achieves the object to provide a delivery compensation unit provided with an overflow drain system connected directly to the tank without the interposition of any valve means.
  • a further object achieved is the possibility to easily regulate the plaster flow compensation pressure exerted by the delivery compensation unit through the combination of elastic elements of various types.
  • the invention also achieves the object to provide a delivery compensation unit that is safer compared to the delivery compensation units of pneumatic type.
  • the plaster sprayer and the delivery compensation unit may be modified and variants of the same, which are neither described nor represented herein, may be carried out in order to improve its functionality and make it more economic to produce.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Nozzles (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
EP08164843A 2007-09-28 2008-09-23 Unité de compensation d'alimentation améliorée Withdrawn EP2042730A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI20070261 ITVI20070261A1 (it) 2007-09-28 2007-09-28 Gruppo compensatore di portata perfezionato

Publications (2)

Publication Number Publication Date
EP2042730A2 true EP2042730A2 (fr) 2009-04-01
EP2042730A3 EP2042730A3 (fr) 2010-11-03

Family

ID=40280745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08164843A Withdrawn EP2042730A3 (fr) 2007-09-28 2008-09-23 Unité de compensation d'alimentation améliorée

Country Status (2)

Country Link
EP (1) EP2042730A3 (fr)
IT (1) ITVI20070261A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAR20120003A1 (it) * 2012-01-20 2013-07-21 Leonardo Mattoni Fugatrice per stucchi e premiscelati
ITUA20162273A1 (it) * 2016-04-04 2017-10-04 Turbosol Produzione Spa Macchina per il pompaggio di materiali per l’edilizia
CN110181672A (zh) * 2019-05-15 2019-08-30 贾国平 一种高压混凝土冲压给料装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115416161A (zh) * 2022-10-14 2022-12-02 湖南中联重科新材料科技有限公司 喷淋装置及方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980343A (en) * 1959-01-19 1961-04-18 Hudson Mfg Co H D Hand sprayer
US3014624A (en) * 1959-02-17 1961-12-26 Seiwa Machinery Company Ltd Apparatus for discharging concrete
GB891635A (en) * 1960-01-21 1962-03-14 Wilson John H Suction flow equalizer for piston pumps such as mud pumps
FR1447478A (fr) * 1965-06-25 1966-07-29 Turbosol A I Srl Machine pour la production et la projection de mortier fin ou de matériaux analogues
FR1588227A (fr) * 1967-07-22 1970-04-10
FR2359632A1 (fr) * 1976-07-28 1978-02-24 Dso Stroitelna Technika Installation pour le transport et le depot de materiaux de badigeonnage
FR2615439A1 (fr) * 1987-05-22 1988-11-25 Turbosol Produzione Spa Machine pour le transport et la projection de mortiers, enduits et melanges similaires
EP0726392A1 (fr) * 1995-02-10 1996-08-14 TURBOSOL PRODUZIONE S.p.A. Machine de pompage de matériaux de construction

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980343A (en) * 1959-01-19 1961-04-18 Hudson Mfg Co H D Hand sprayer
US3014624A (en) * 1959-02-17 1961-12-26 Seiwa Machinery Company Ltd Apparatus for discharging concrete
GB891635A (en) * 1960-01-21 1962-03-14 Wilson John H Suction flow equalizer for piston pumps such as mud pumps
FR1447478A (fr) * 1965-06-25 1966-07-29 Turbosol A I Srl Machine pour la production et la projection de mortier fin ou de matériaux analogues
FR1588227A (fr) * 1967-07-22 1970-04-10
FR2359632A1 (fr) * 1976-07-28 1978-02-24 Dso Stroitelna Technika Installation pour le transport et le depot de materiaux de badigeonnage
FR2615439A1 (fr) * 1987-05-22 1988-11-25 Turbosol Produzione Spa Machine pour le transport et la projection de mortiers, enduits et melanges similaires
EP0726392A1 (fr) * 1995-02-10 1996-08-14 TURBOSOL PRODUZIONE S.p.A. Machine de pompage de matériaux de construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAR20120003A1 (it) * 2012-01-20 2013-07-21 Leonardo Mattoni Fugatrice per stucchi e premiscelati
ITUA20162273A1 (it) * 2016-04-04 2017-10-04 Turbosol Produzione Spa Macchina per il pompaggio di materiali per l’edilizia
CN110181672A (zh) * 2019-05-15 2019-08-30 贾国平 一种高压混凝土冲压给料装置
CN110181672B (zh) * 2019-05-15 2021-04-16 贾国平 一种高压混凝土冲压给料装置

Also Published As

Publication number Publication date
ITVI20070261A1 (it) 2009-03-29
EP2042730A3 (fr) 2010-11-03

Similar Documents

Publication Publication Date Title
EP2042730A2 (fr) Unité de compensation d'alimentation améliorée
US8668554B2 (en) Blasting nozzle for a device for blast-machining or abrasive blasting objects
EP3312492B1 (fr) Système de distribution de lubrifiant semi-solide et procédé de commande d'un tel système
KR101496319B1 (ko) 분무기
EP3685923A1 (fr) Pistolet de pulvérisation de matériau
EP3685922A1 (fr) Pulvérisateur de matériau
US5193561A (en) Apparatus having a fluid timer for cleaning paint from objects
NO173688B (no) Innretning for intermitterende paasproeyting av en pastamasse
TW200502634A (en) Liquid crystal dispensing system and method of dispensing liquid crystal material using thereof
CN206701543U (zh) 板材腻子涂装机
US3953077A (en) Vacuum-and-pressure pneumatic conveying installation for pulverized materials
JP4149822B2 (ja) 液体吐出装置
US20100108179A1 (en) Vehicle-based mobile fluid delivery system apparatus and methods
KR20060102633A (ko) 소결기 장입장치의 부착광 제거장치
CN1891954A (zh) 搅笼式湿喷机
EP0519567B1 (fr) Dispositif pour le traitement de restes de béton et/ou de mortier
KR101712656B1 (ko) 콘크리트 몰탈 시공장비용 맥동 방지 장치
CN110039654A (zh) 一种新型自流平水泥搅拌及气动输送一体机
KR200238016Y1 (ko) 분사장치
US1995414A (en) Plastering machine
CN220182738U (zh) 一种消毒液生产用快速灌装装置
CN216042460U (zh) 一种具有自动清洁功能的全自动砂浆喷涂机
CN107855751A (zh) 一种应用于led灯组装机的上料机构
KR0133173B1 (ko) 공압식 콘크리트 송출장치
CN108607488A (zh) 二氧化锰化合石头粉浆化系统及其控制方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

REG Reference to a national code

Ref country code: DE

Ref legal event code: R108

AKY No designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: R108

Effective date: 20110701

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110504