Classifications

• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03F—SEWERS; CESSPOOLS
  • E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
  • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
  • B08B9/027—Cleaning the internal surfaces; Removal of blockages
  • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
  • B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
  • B08B9/0495—Nozzles propelled by fluid jets

Definitions

• the present invention relates to a mobile device for cleaning vertical ducts in buildings, comprising a tank for cleaning liquid, a unit for pressurising the cleaning liquid, a feeder hose for .supplying the pressurised clean ⁇ ing liquid to the vertical duct, a riser hose connected to the feeder hose and adapted to conduct the cleaning liquid upwards in said duct, and a spray nozzle mounted at the end of the riser hose and having a number of circumferen- tially distributed holes for discharging the pressurised cleaning liquid in such a manner that the spray nozzle and the riser hose are propelled upwards in said duct while at the same time cleaning the duct wall.
• a great deal of money is spent on improving our living-environment, e.g.
• stoppages in the vertical sewage pipe are, however, more difficult to dissolve and indicate that there is need of a complete cleaning of the sewage pipe.
• Cleaning a vertical sewage pipe in a block of flats is a complicated procedure, and the result is often unsatisfactory. For one thing, it is necessary to go from flat to flat and clean the pipe by stages. Furthermore, it is difficult to flush the pipe since this involves soiling the places from which the work is being done, i.e. the flats.
• this method involves two major inconveniences.
• FR-2,076,239 discloses an installation for cleaning horizontal ducts.
• a spray nozzle is mounted at the end of a feeder hose connected to a tank containing cleaning liquid.
• the spray nozzle is formed with holes for the cleaning liquid which are facing back ⁇ wards and serve to propel the nozzle forward while simul ⁇ taneously cleaning the duct wall.
• SE 8702219-0 discloses a self-climbing device for cleaning refuse chutes.
• None of these constructions can be used for cleaning from the bottom upwards a vertical sewage pipe whose inner diameter is about 15 cm.
• the French patent gives no indication of the specific criteria of the instal lation for enabling the nozzle to climb inside a vertical pipe up to e.g. the eighth floor, while at the same time cleaning the duct wall.
• the construction ac ⁇ cording to the Swedish patent could not be introduced into a vertical sewage pipe, nor would there be room for it.
• the object of the present invention is, therefore, to enable cleaning of vertical ducts, primarily sewage pipes in blocks of flats, from the bottom end of the duct up to the top end.
• This object is achieved by a mobile device, the dis ⁇ tinctive features of which are stated in the characteris ⁇ ing clause of appended claim 1.
• the Figure shows a mobile device 1 according to the invention during cleaning of a refuse chute 9 in a build- ing 12.
• the mobile device comprises a lorry 2 with a platfor which carries the components needed for the cleaning.
• a tank 3 containing cleaning liquid, which is a mixture of water and a cleaning agent.
• the tank is connected to a high-pressure unit 4 which, with the aid of a power source, pressurises the cleaning liquid.
• a hose 5 is woun on a drum 6 and connected at one end to the high-pressure unit 4.
• a clean- ing means 8 which has a number of nozzles directing the cleaning liquid towards the wall of the refuse chute 9.
• the jets are mainly directed downwards, which enables th cleaning means 8 to climb by itself up the duct, since t jets from the nozzles serve to drive the cleaning means upwards in the refuse chute.
• the hose 5 is made up two members, namely a thick feeder hose going between the high-pressure unit 4 and t basement of the building, and a light riser hose, at the end of which the cleaning means 8 is mounted.
• the feeder hose and the riser hose are interconnected by means of a swivel connection.
• the riser hose is wound on drum which is placed at the bottom end of the refuse chute.
• the inventive device is above all adapted for clean ing vertical sewage pipes.
• the invention makes it possible to feed a flushing hose up a vertical sewage pipe from the basement of a high-rise block up to the top floor.
• the pressure should be 110-320 bar. If the pressure is below about 110 bar, the lifting power is too low, while a pressure of more than about 320 bar necessitates the use of too heavy and rigid hoses.
• the spray nozzle used may be differently designed. Some holes may, for instance, be directed radially outwards to serve as cleaning holes, whereas other holes may be facing back- wards to serve as propulsion holes.
• the diameter of the riser hose should be between 7 and 10 mm to achieve satis factory results. If the diameter is reduced, throttling becomes too pronounced, and the pressure of the cleaning liquid that is discharged becomes too low. A riser hose with an inner diameter exceeding 10 mm would be too heavy and would thus reduce the total working height.
• the pressure is 320 bar, there are eight holes, all of which are at an angle of 45 to the discharge direction of the spray nozzle, and there is a riser hose with an inner diameter of 8 mm. Tests mad with different pressures, different numbers of holes, and different angles of aperture for these holes, are given i the Table below.
• the testing equipment was not given the opportunity of working at heights exceeding 5 m. However, 5 m is no upper limit for the real working height, since the spray nozzle and the riser hose together weigh less than 7 kg. With the inventive device, it is also possible to clean vertical sewage pipes having a plurality of bends.
• the propulsion unit i.e. the spray nozzle, and the light and flexible riser hose make this possible.
• a refuse chute is cleane in the following manner.
• the lorry is driven up to the building. About 100 m of high-pressure hose is unwound from the drum and brough to the refuse chute. As mentioned above, the hose may, of course, be unwound by stages. It should be pointed out that the hose used in this example is a continuous hose.
• the cleaning device is positioned at the bottom end of the refuse chute 9, and the cleaning operation, which is guided from the control panel 7 by remote control, is begun. Before start-up, all the doors in the refuse chute are sealed with a rubber collar. Cleaning is carried out with a variable pressure of up to 320 bar. If the pipes are old and more liable to damage, the pressure is adapte accordingly.
• Cleaning is carried out from below upwards and is continuously controlled/supervised by an operator.
• the cleaning liquid consumed during the operation is either pumped out into the sewer or collected in a tank o the lorry.
• the refuse chute After cleaning, the refuse chute is free from bac- teria, and bad smell will no longer be a problem.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Cleaning In General (AREA)
• Sink And Installation For Waste Water (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20376682

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (2)

• 1989
  • 1989-08-17 SE SE8902757A patent/SE8902757D0/sv unknown
• 1990
  • 1990-08-17 WO PCT/SE1990/000535 patent/WO1991002602A1/en active Application Filing
  • 1990-08-17 AU AU62769/90A patent/AU6276990A/en not_active Abandoned
• 1991
  • 1991-12-23 SE SE9103829A patent/SE9103829D0/sv not_active Application Discontinuation

Patent Citations (2)

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