WO1990001288A1 - Systemes de nettoyage par aspiration - Google Patents

Systemes de nettoyage par aspiration Download PDF

Info

Publication number
WO1990001288A1
WO1990001288A1 PCT/AU1989/000335 AU8900335W WO9001288A1 WO 1990001288 A1 WO1990001288 A1 WO 1990001288A1 AU 8900335 W AU8900335 W AU 8900335W WO 9001288 A1 WO9001288 A1 WO 9001288A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
tank
filter
water
matter
Prior art date
Application number
PCT/AU1989/000335
Other languages
English (en)
Inventor
Keith Charles Harris
Anthony Philip Knight
Original Assignee
Keith Charles Harris
Anthony Philip Knight
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 Keith Charles Harris, Anthony Philip Knight filed Critical Keith Charles Harris
Publication of WO1990001288A1 publication Critical patent/WO1990001288A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/102—Dust separators

Definitions

  • the present invention relates to suction cleaning systems for the removal of household and industrial debris.
  • Systems of this type may typically be used for such applications as the cleaning of spouting and guttering, cleaning silos, removal of sludge from water tanks and many other cleaning applications involving the removal of solid or particulate matter.
  • Heavy duty trailer or truck-mounted suction cleaning systems for removing significant quantities of solid or particulate matter have typically comprised a gear pump for creating a high suction pressure.
  • Such pumps tend to be damaged by 88
  • the filter tends to clog relatively quickly and in order to prolong the period of operation of the system before cleaning of the filter is necessary, it is customary to use a filter with a large surface area.
  • the filter is typically mounted in a debris-receiving tank incorporated in the suction line and in order to provide an adequate surface area for the filter, the tank is of a very substantial diameter, typically several feet, whereby it often becomes necessary to mount the tank on a vehicle or trailer separate from that on which the remainder of the equipment is mounted.
  • a suction cleaning system comprising an air pump, a relatively coarse filter in a suction line upstream of the pump to filter larger particles and large matter prior to the pump, and a separator in a discharge line downstream of the pump for separating from the discharge airstream, water and smaller particulate matter discharged from the pump.
  • the pump is a liquid ring pump having a water sealing system between the pump rotor and the pump casing, and the separator downstream of the pump is associated with a tank which receives separated water and particulate matter from the discharge airstream, water being fed from the tank to the pump whereby to replace sealing water discharged from the pump with the airstream.
  • FIG. 1 shows schematically a suction cleaning system in accordance with the invention
  • Figure 2 is a schematic plan view showing in greater detail a downstream separator of the system.
  • Figure 3 is a schematic side elevation of the separator.
  • the suction cleaning system in accordance with the preferred embodiment of the invention is a heavy duty system which is truck or trailer mounted.
  • the system comprises a pump 2 driven by a motor 4, preferably an internal combustion engine, via a drive belt system.
  • the pump 2 is in the form of a so-called liquid ring pump consisting of a vane rotor eccentrically mounted within a casing.
  • the casing is partially filled with water which, when the rotor is driven, is formed into an annular layer between the inner surface of the casing and the tips of the vanes in order to form a liquid seal between the vanes and the casing without the vanes actually touching the casing.
  • the pump 2 acts as an air suction pump and it has been determined that a pump of this type will not suffer damage when small particles of grit, dust or other particulate matter are drawn into the pump with the incoming air.
  • the inlet to the pump 2 is fed from a suction inlet hose 6 via a combined waste-receiving tank 8 and filter 9 and a suction line 10 leading to the pump inlet from the tank 8 downstream of the filter 9.
  • the filter 9 comprises upper and lower mesh sheets with a 88
  • the fibrous filling may consist of a stuffing similar to that used in upholstery.
  • a stuffing composed of "DACRON" (trade mark) has been found to be suitable for this purpose.
  • the mesh sheets do not act as a filter except in the case of the lower sheet which will act to trap very large matter such as leaves and the like.
  • the primary function of the mesh sheets is to act to support the fibre filling and a typical mesh size for this purpose may be 5cm by 5cm.
  • the fibrous filling is not packed between the mesh sheets with a high density, the density of the packing being such that the filter does not filter out fine particles of dust or grit, but rather, these particles are allowed to pass through the filter 9 into the suction line 10 to be removed in a subsequent stage downstream of the pump 2 as will be described later.
  • the small particles which would otherwise quickly clog the filter are thus not trapped by the filter but are allowed to pass through the filter.
  • the filter may allow passage of particulate matter of a size up to about 125 microns (50 thousandths of an inch) .
  • the filter area can be significantly smaller than would otherwise be necessary in a conventional system, whereby the overall filter and receiving tank can be made smaller such that the entire system can be mounted on a single vehicle or a single trailer.
  • the discharge from the liquid ring pump 2 consists of a stream of air entraining droplets of water 88
  • the discharge airstream is fed via a discharge line 14 to a separator 16 in which the water and particulate matter are removed prior to discharge of the air, thus cleansed, to atmosphere.
  • the separator 16 is mounted above a collecting tank 18 which collects the water and particulate matter.
  • the separator 16 comprises a tubular housing through which the airstream passes.
  • the housing contains several stages of overlapping V-shaped baffles 20 whereby the airstream is caused to flow in a tortuous path through the housing. Water droplets and particulate matter impinging on the baffles 20 rapidly decelerate.
  • the water droplets and particles will move downwardly along respective ones of the baffles to pass into the tank 18 via apertures 22 in the lower wall of the housing adjacent the trailing edge of each baffle 20.
  • Downstream of the overlapping V-shaped baffles 20 is a partition 24 which extends across the full cross-section of the housing and prevents direct air flow through the housing at that point.
  • the bottom wall of the housing is open to provide direct communication with the collecting tank 18 and the partition 24 projects through this opening into the tank 18.
  • the partition 24 causes the air flow to be deflected downwardly into the tank 18 at the upstream side of the partition 24 .
  • the tank 18 is a sealed tank and the airstream takes an abrupt 180° turn at the lower end of the partition 24 to flow back into the end of the separator housing downstream of the partition 24 for subsequent discharge to atmosphere via a discharge line 26 leading from the housing.
  • the collecting tank 18 receives a mixture of water, dust, and particulate matter which slowly settle out of the water to form a silt at the bottom of the tank.
  • the silt can be removed periodically from the tank through an outlet 27 at the bottom.
  • a water return line 28 leads from the tank 18 to the pump 2 to replenish sealing water which may have been discharged through the outlet of the pump.
  • the tank 18, being sealed, is pressurised by the discharge air flowing through the separator housing and the pressure prevailing in the tank is sufficient to fed water through the return line 28 into the pump without a separate pump being necessary.
  • the return line 28 incorporates a valve 30 which is adjustable so that the water flow rate through the return line 28 is sufficient to balance the sealing water depletion through the discharge line 14.
  • the liquid ring pump is a two-stage pump driven at 1500 rpm and having an air flow capacity of 800 cubic metres per hour.
  • a suitable pump is sold in Australia as the "DYNAVAC" LR800D.
  • the suction hose upstream of the waste-receiving tank is 2 1/2 inches diameter and the suction line between the waste-receiving tank and the pump is 3 inches in diameter.
  • the waste-receiving tank has a capacity of around 2 cubic metres and the tank associated with the water separator has a capacity of about 70 litres. A system of this size can easily be mounted as a whole on a small truck.
  • the fine particulate matter which, in earlier systems, was filtered out upstream of the pump in order to prevent damage to the pump is instead removed as a silt downstream of the pump.
  • the direct feeding of the fine particulate matter to the pump without intermediate removal also obviates dust handling problems as all the fine matter can be removed from the system as a silt.

Abstract

Le système de nettoyage par aspiration à grande puissance décrit, qui sert à aspirer des débris ménagers et industriels, comprend une pompe à air ayant la forme d'une pompe à anneau liquide (2) qui reçoit de l'air et les matières fines entraînées après passage à travers un filtre amont à grosse maille (9), qui retient uniquement les matières grossières. Les matières fines, en particulier la poussière, passent à travers la pompe à anneau liquide pour être extraites du courant d'air après dépôt dans un étage de séparation aval. Un tel système empêche que le filtre amont soit bouché par des particules de poussière.
PCT/AU1989/000335 1988-08-04 1989-08-04 Systemes de nettoyage par aspiration WO1990001288A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPI9653 1988-08-04
AUPI965388 1988-08-04
AUPJ083988 1988-10-07
AUPJ0839 1988-10-07

Publications (1)

Publication Number Publication Date
WO1990001288A1 true WO1990001288A1 (fr) 1990-02-22

Family

ID=25643519

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000335 WO1990001288A1 (fr) 1988-08-04 1989-08-04 Systemes de nettoyage par aspiration

Country Status (1)

Country Link
WO (1) WO1990001288A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010972A1 (fr) * 1993-10-22 1995-04-27 Sjoegreen Joergen Aspirateur polyvalent
CN102900041A (zh) * 2011-07-24 2013-01-30 芜湖爱瑞特环保科技有限公司 电动清扫车喷淋装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665683A (en) * 1969-09-29 1972-05-30 Nat Union Electric Corp Vacuum cleaner having pre-filter and dust bag
US4145198A (en) * 1977-10-07 1979-03-20 Parise & Sons, Inc. Single tube hydro air filter with dividing wall
WO1981001362A1 (fr) * 1979-11-16 1981-05-28 Rolba Ag Balayeuse, notamment pour le ramassage de materiaux sous forme de poussiere et son utilisation
AU6096386A (en) * 1985-10-01 1987-04-02 Rexair, Inc. Vacuum cleaner construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665683A (en) * 1969-09-29 1972-05-30 Nat Union Electric Corp Vacuum cleaner having pre-filter and dust bag
US4145198A (en) * 1977-10-07 1979-03-20 Parise & Sons, Inc. Single tube hydro air filter with dividing wall
WO1981001362A1 (fr) * 1979-11-16 1981-05-28 Rolba Ag Balayeuse, notamment pour le ramassage de materiaux sous forme de poussiere et son utilisation
AU6096386A (en) * 1985-10-01 1987-04-02 Rexair, Inc. Vacuum cleaner construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010972A1 (fr) * 1993-10-22 1995-04-27 Sjoegreen Joergen Aspirateur polyvalent
CN102900041A (zh) * 2011-07-24 2013-01-30 芜湖爱瑞特环保科技有限公司 电动清扫车喷淋装置

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