Classifications

• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03F—SEWERS; CESSPOOLS
  • E03F5/00—Sewerage structures
  • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
  • E03F5/042—Arrangements of means against overflow of water, backing-up from the drain

Definitions

• This invention relates to a safety device for drai age systems and floordrains.
• Drainage systems e. g. systems for drainage pipes deposited in the ground to keep the ground water level at houses and the like on a desired level are generally on the outlet side connected to surface water drain systems. These surface water drain systems do not only take charge of drainage water but als water coming from gully holes and downpipes from roofs.
• the surface water drain system and the sewer system are combined.
• the water level of the ground drainage system and the water in the floor drains may often be slightly different.
• heavy cloudbursts, combined with settling of ground and sludge accumulations may cause the water level in the system to rise and water flows into the sub soil drainage pipes.
• the device shown in Fig 1 comprises a tank 1 with a bottom and a sludge space 10 above said bottom.
• this sludge space 10 In the upper part of this sludge space 10 there are in- " clined, upwardly directed connections 4, 5 for connec- tion to downpipes outlet and surface water drain, respec ⁇ tively.
• the tank tapers off via a shoulder portion 8 forming the frustrum of a cone with its apex turned upwards.
• the cone 8 passes onto- •a connection or seat 7.
• a ball 6 placed in the tank can abut against the seat 7 as it is centered by the tapered shoulder portion and is lifted by water 9 in the tank 1 if the supply of the downpipe water and surface water drain is so great that the outlet sewer cannot swallow this.
• the ball 6 prevents water from pene- trating up to the upwardly directed connection of drain ⁇ age water.
• the sub soil water enters the tank via a T- piece with a connection 3 for the sub soil water and an upwardly directed connection 2.
• This connection 2 can be used as an opening for cleaning out the tank by means of an extension.
• the tank will make it possible to bring to ⁇ gether drainage water and downpipe water without the risk of backward flow in the drainage pipes.
• the tank of the invention can either be used in- stead of a surface water shaft or as a complement to an existing one.
• Fig 2 it is shown how the inventive idea has been used in a small and compact service clean out floor.
• the device comprises a freely floating ball 24 in space 26 which upwardly tapers off like a funnel to a connection 21 simultaneously being a sealing seat of the ball at a rising water level.
• the discharge connection 21 is connected to the sewer from the house instead of the ground drain system around a housing. In this way flooding of basements at torrential rains will be prevented which has been of an ever increasing importance
• the safety device shown in Fig 2 is not like the tank in Fig 1 primarily intended for sludge collection, but of course it can also be cleaned easily by inserting a sludge exhauster through the -discharge connection 21.
• Fig 2 designates the outlet of the service clean out, formi light bend so that a water trap is obtained.
• This water trap need not be quite watertight but the lip levels may be such that the connected outlet pipe can be ventilated.
• Fig 2 the safety drain is manufacture in two pieces, a lower portion and a cover which is necessary in order that the freely floating ball might be inserted. Sealing and assembly of the two parts belong to known art and have therefore not been described in greater detail.
• the great advantage of the invention is that no waterproof seals have to be open in order to clean tarik or clean out,in fact sludge deposits can be removed wit a minimum of work.
• water under high pressure can be used for instance in the safety device by use of the connection 22, particulary designed for this.
• this version of the safety device in accordance with the invention is some- what more sofisticated.jan in general is however same as for above versions with a rustocronical top 34 in which a ball 45 can close an upper inlet if the water level in the device becomes to great in order to prevent back water, when water from different sources is to be drained away.
• ⁇ first difference is established by an additional cap being arranged over the top of the safety device.
• This cap 35 encloses the top 34 of the device but with an intermediate space 36 there between.
• ⁇ he cap is sealed against the top entrence pipe 38 of the de- vice and below this seal holes 37 are provided in this entrance pipe or connection 38. In this way water can be drained away at the device itself.
• the water entering below the lower lip of the cap 35 rises in the space 36 and emerges through the holes 37 and flows into the sludge room 40 of the safety device.
• the free floating ball 45 can be pushed aside when one wishes to remove possible sludge from the device.
• An Outlet 46 extends through top 34 and cap 45 and is connected to, for instance ⁇ a municipal sewer system.
• the safety device is furthermore at its bottom completed by the arrangement of a further sludge room 40a by extending the device downwards with a longitudinal part 32 all over bottom 33 and an intermediate roof 41 also constituting the bottom 42 of the upper sludge room 40.
• the intermediate roof 41 is provided with a lip ex- tendning to some extent below the upper edge of the longi ⁇ tudinal part 32 and in the latter holes or openings are provided so that water can flow out from the lower sludge room 40a into the surrounding ground.
• The" roof 41 is sealed of from the upper part of the safety device and is provided with an eccentric extension 39 extending all the way up through the safety device and this pipe is with a T-shaped connection connected to, for instance, pipes carrying water from roffs or the like.
• This pipe 39 ex- tends all the way up to the surface as the pipe 28 in order to allow sludge removal through these pipes.
• Water can enter into the device in three ways: through the pipes 38 or 39 or through the water inlets/ outlets 36 and 43 and water can be led away through the outlet 46 or through the water inlets/outlets 36 and 43.
• the possibility of draining away the water at the safety device itself acctually prolonges the life time of the draining system. This is due to the fact that normal sub soil drain pipes usually will have there draining capacity drasticly reduced allready after a few years, whereas the drain filling around the drain pipe will be effective for a longer time and is in general capable of transporting water along the pipe just as well as the pipe itself. In this way .the water can reach the safety device in accor- dance with the invention and be drained away there and still the drain system is protected against back flow of polluted water from the outlet 46.
• Fig 4 shows a safety device similar to that in Fig 3 but provided with a connection 50 between the upwards extending pipes 58 and 59 to the pipe 59 a pipe 57 carrying roof surface water is connected.
• a pipe 57 carrying roof surface water is connected.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Hydrology & Water Resources (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Sewage (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20358866

Family Applications (1)

Country Status (3)

Cited By (5)

Citations (7)

• 1985
  • 1985-08-09 EP EP85904300A patent/EP0267182A1/en not_active Withdrawn
  • 1985-08-09 WO PCT/SE1985/000306 patent/WO1987000880A1/en unknown
• 1987
  • 1987-04-09 NO NO87871490A patent/NO871490L/no unknown

Patent Citations (7)

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