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
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/02—Cleaning by the force of jets or sprays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/02—Cleaning by the force of jets or sprays
  • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
  • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
  • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
  • B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
  • B05B9/0855—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven
  • B05B9/0861—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven the motor being electric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
  • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
  • B08B2203/0223—Electric motor pumps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
  • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
  • B08B2203/027—Pump details
• • 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
  • F04B2203/00—Motor parameters
  • F04B2203/02—Motor parameters of rotating electric motors
  • F04B2203/0209—Rotational speed

Definitions

• the present invention refers to a system equipped with variable-pressure and low-flow-rate pumping unit.
• the invention will . be described with reference to a system for cleaning, but it will be able to be used, in an equally efficient way, in similar, but also different, fields, such as industrial cleaning, materials- removing activities, de-painting, etc., as described below.
• variable-pressure water for example for washing pipes, reactors, floors, machinery, painting plants, tanks and the like.
• the pumping units and variable-pressure systems available on the market have the purpose of exploiting the whole power provided by the variable-pressure pump, in terms both of pressure and of flow-rate.
• the variable-pressure water allows not using acids or solvents for cleaning, with consequent environmental and economic benefits.
• These systems however are not satisfactory and have, among other things, the problem of having to use not very high operating pressures, included between 80 and 200 bar, and high water flow-rates, included between 30 and 90 litres/minute: such conditions are serious difficulties for an operator responsible for cleaning, forced to operate with violent jets and scarcely controlled splashes of variable-pressure water.
• High-pressure systems are further known, which however require exploiting the whole power supplied by the high-pressure pump, in terms both of pressure and of flow-rate.
• object of the present invention is solving the above prior art problems, by providing a system equipped with variable-pressure and low- flow-rate pumping unit, that allows obtaining the following improvements:
• purpose of the system according to the present invention is providing minimum performance for carrying out its working (industrial cleaning, materials-removing activities, paint stripping, etc.) in order to use the lowest amount of water possible; this is the innovation introduced by this pumping unit, that has been devised and designed in order to optimise this object.
• the inventive system therefore comprises:
• (pump) 1 adapted to pump at a high output pressure water or other similar fluids
• At least one device 5 for regulating the revolutions of the pump 1 (in particular an inverter) , connected to the motor 3 for its control ;
• At least one nozzle 15 of a special type for low flow-rate, equipped with at least one rotary head rotated by at least one pneumatic motor;
• At least one air compressor 7 designed to provide the supply compressed air for such pneumatic motor.
• the pumping unit of the invention can further comprise at least one system 9 for filtering water, connected to at least one tank 11 for water, in turn connected to at least one electro-pump booster 13, connected to the high-pressure pump 1; and
• the high-pressure pump 1 is connected to the electric motor 3 through a coupling system that transmits motion.
• the electric motor 3 is driven through an electric panel (not shown) that includes the inverter 5 in order to be able to change the revolutions of the high-pressure pump 1 and therefore its flow-rate; the revolutions of the motor 3 are regulated by the operator depending on the pressure value to be adopted and the consumption of water to be obtained.
• the supply water to the high-pressure pump 1 is made pass through a filtering system 9 and then it is stored into the accumulating tank 11; the electro-pump booster 13 allows sending water at the inlet of the high-pressure pump 1.
• the high-pressure pump 1 is further equipped with a control valve (not shown) that can be actuated both electrically and pneumatically; and the air compressor 7 takes care of providing the necessary compressed air.
• the air compressor 7 then supplies the pneumatic motor of the rotary head of the nozzle 15.
• the rotary head can have both a symmetrical and an asymmetrical arrangement of its nozzles: in addition, the system further comprises at least one second nozzle equipped with at least one rotary head rotated by the water flow going out of its nozzles.
• the innovative aspect of the above-described pumping unit consists in building the high-pressure pump 1 so that it delivers the maximum possible pressure with a very low flow-rate and at a reduced size, solution that can be obtained by using the inverter 5 connected to the electric motor 3, also with small sizes.
• electro-pump 1 with 11 kW (instead of the traditional 57 kW required for this type of pumps) with 450 rpm (variable through the inverter 5) : such pump is preferably a pump made by the Company WOMA of the Kaercher Group with code 70M P10, of the triplex type with horizontal diving pistons and with lamellar sealing gaskets, completed with head, conversions and stainless steel flanges, pressure by-pass, breakage disk and manometer with glycerine bath;
• air compressor 15 with 230 Vac, 50 Hz single- phase with 6-bar pressure switch; - plastic tank for supply water, about 60 litres, completed with level switch for maximum level, minimum-level probe, supply solenoid valve from mains water, for a maximum of 2 bar;
• the above-described system with pumping unit can be installed on a van (not shown) dedicated to the system itself, namely equipped with an electric supply source and with an accumulating tank in order to guarantee some autonomous operating hours.
• the sizes are such as to allow the system to pass through normal doors
• the weight is reduced to a maximum, in order to be able to be transported on a van
• the assembly structure is made in order to reduce the motor and pump vibrations to a minimum and the rubber wheels do not transmit the possible vibrations on the ground
• the assembly is equipped with steering wheels that allow its movements through a person' s thrust
• the assembly has to be supplied with water and three-phase and single- phase electric energy, in order to reduce to a minimum the necessary couplings (air compressor, pump booster and water-filtering system are integrated in the assembly)
• the pressure adjustable from 0 to 500 bar makes this assembly unique in the current high pressure field and allows a high working flexibility, allowing to perform several works
• the low flow-rate used (from 2 to 4 l/min) allows minimising the ecological impact and reducing the waste of necessary water for performing the works
• the electric panel is equipped with all necessary warning lights for the correct operation of the unit; moreover, there is a panel for managing the speed-changing device, in order to provide all information about the operation in a simple and immediate way
• an exclusive nozzle in order to manage the low water flow-rate being generated, an exclusive nozzle is used, which is able to operate till 500 bar.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Control Of Non-Positive-Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=46800302

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (3)

• 2012
  • 2012-07-12 IT IT000615A patent/ITTO20120615A1/it unknown
• 2013
  • 2013-07-03 WO PCT/IT2013/000185 patent/WO2014009983A2/en active Application Filing
  • 2013-07-03 ES ES13756704.6T patent/ES2619627T3/es active Active
  • 2013-07-03 EP EP13756704.6A patent/EP2893193B1/de active Active

Non-Patent Citations (1)

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