WO2001090495A1 - Arrangement related to vacuum sewage system - Google Patents

Arrangement related to vacuum sewage system Download PDF

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Publication number
WO2001090495A1
WO2001090495A1 PCT/NO2001/000214 NO0100214W WO0190495A1 WO 2001090495 A1 WO2001090495 A1 WO 2001090495A1 NO 0100214 W NO0100214 W NO 0100214W WO 0190495 A1 WO0190495 A1 WO 0190495A1
Authority
WO
WIPO (PCT)
Prior art keywords
toilet
vacuum
pump
liquid ring
emptying
Prior art date
Application number
PCT/NO2001/000214
Other languages
French (fr)
Inventor
Bjarte Hauge
Olav Hofseth
Original Assignee
Jets Vacuum As
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 Jets Vacuum As filed Critical Jets Vacuum As
Priority to AU2001264421A priority Critical patent/AU2001264421A1/en
Publication of WO2001090495A1 publication Critical patent/WO2001090495A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/006—Pneumatic sewage disposal systems; accessories specially adapted therefore

Definitions

  • the present invention concerns vacuum drainage system, comprising a pipe system which is connected to one or a small number of toilets, urinals, sinks, etc. and a vacuum pump in the form of a liquid ring pump of the screw type with an integrated grinder for the creation of a vacuum in the pipe system and emptying of the toilets, etc.
  • EP patent no. 0 454 794 describes a prior art vacuum drainage system of the above type in which a liquid ring pump is used which is designed to maintain a constant vacuum in the drainage system and to empty the drainage system.
  • a governor/pressure sensor controls the operation of the liquid ring pump in that the pump is started when the pressure in the drainage system exceeds a given value, for example as a consequence of leakage or in connection with emptying the toilet, etc. and the pump is stopped when a given vacuum has been achieved in the system.
  • This solution is well suited for vacuum drainage installations with a large number of toilets, urinals, sinks, etc.
  • a disadvantage of the solution is that energy will be used to maintain the vacuum as a consequence of leakages, which are not uncommon in large systems. The vacuum pump will thus also start and stop at random even if the system is not in use.
  • the present invention describes a solution which is particularly well suited for small installations with one or a small number of toilets, urinals, sinks, etc., for example in houses, public toilets, parts of buildings, cottages, pleasure boats or caravans.
  • the solution is very simple and inexpensive and is based on the use of a liquid ring screw pump with an integrated grinder, as described in the above EP patent, to create, on the one hand, a vacuum to empty toilets, etc. and, on the other hand, to pump drainage water over into a tank, an established drainage system, a sewage treatment plant, etc.
  • the solution uses very little energy as the vacuum pump is only started when the toilet is in use.
  • the solution is based on intermittent operation, i.e. the pump is only in operation for each emptying/flushing operation, which is a clear advantage with regard to reliability and installation.
  • systems in accordance with the present invention generate less noise as they operate with less (lower) vacuum.
  • Fig. 1 shows a diagram of a vacuum drainage system in accordance with the present invention
  • the present invention comprises a liquid ring screw pump with an integrated grinder 7 which is directly connected to a toilet 1 via a vacuum hose 6.
  • the time for which the pump should operate is calculated and tested in each individual case and depends, among other things, on the length of the vacuum hose and the capacity of the pump. For example, in a system which the applicant has tested and which comprised only one toilet, it was found necessary to have a pump operating time of approximately 5 seconds. After the pump has been in operation for the necessary number of seconds to build up the vacuum in the hose 6, the control circuit gives a signal to a solenoid valve (not shown) arranged in connection with the drainage valve 2 so that it opens by means of the vacuum generated in the vacuum hose 6. The contents are sucked out of the toilet via the hose 6 to the pump 7 and pumped on by the pump through a drainage hose 9 to a tank, sewage treatment plant, etc. (not shown in detail).
  • the pump expediently continues to operate for a short period of time, a few seconds, after emptying until the valve 2 closes and is thus ready for a new emptying operation.
  • the emptying sequence also comprises a flushing operation for flushing the toilet.
  • the present invention thus concerns, as the above explains, a solution which comprises a combination of emptying of toilets, etc. by means of a vacuum (a vacuum side) and transport of the drainage liquid via a liquid ring pump by means of pumping (a pressure side) through a drainage hose 9.
  • a vacuum a vacuum side
  • pumping a pressure side
  • the pump 7 can be driven pneumatically/hydraulically or by a DC or AC motor and its capacity (power) can vary. This means that the solution is very flexible and can also be used in situations where electricity is available only from a battery.
  • the present invention is primarily intended for small systems with one toilet, it is possible, as shown in Fig. 2, to adapt it to systems with two or more, preferably not more than ten, toilets 1 and, for example, a sink 11 (see Fig. 2).
  • a collection tank 12 is used with a similar drainage valve 2 as for a toilet but where the pump is started by a level sensor (not shown in detail).
  • the electronic control in the switch cabinet 4 controls the pump operating time, depending on which toilet or sink is to be emptied, as this will vary from vacuum system to vacuum system on account of the different lengths of the vacuum hoses 6 from each toilet/sink. In some situations it may be necessary to install a nonreturn valve (not shown) in each toilet branch pipe to prevent drainage liquid flowing to the toilets which are not in use.
  • Fig. 3 shows a compact solution in which the pump 7, valve 2 and control 4 are integrated in one unit in the toilet 1. This represents a very favourable solution where space is limited, for example in a boat or caravan.
  • Fig. 4 shows an alternative solution in which the toilet, instead of being fitted with a valve, is fitted with a water trap 13. Pressing the start button 3 starts the liquid ring pump 7 immediately and the contents are sucked out of the toilet. The operating time of the pump is set so that the toilet is emptied sufficiently, i.e. normally between 2 and 5 seconds for installations with one toilet.
  • Fig. 5 shows the same functional solution as Fig. 4, but designed in a compact format in which the pump 7, the electrical connection box 4 and the water trap 13 are integrated in the toilet 1.
  • This solution will, as for the solution shown in Fig. 3 above, be particularly relevant for installation situations where space is limited.
  • Figs. 6 and 7 show further examples like those shown in Figs. 1 - 3, but where the operating time is controlled by means of a governor 14 instead of a time relay.
  • a governor 14 arranged in the drainage hose (drainage pipe) 6 gives a signal to the control circuit in the control cabinet 4 so that the pump stops when the vacuum in the hose 6 has reached a level set in advance.
  • the control circuit gives a signal to the emptying valve and the flushing function to empty and flush the toilet.
  • the operating time of the pump is therefore controlled here by means of the governor 14 arranged in the drainage pipe 6.

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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)
  • Sanitary Device For Flush Toilet (AREA)

Abstract

A device in connection with a vacuum drainage system, comprising a pipe and/or a hose system (6) which is connected to one or a small number of toilets (1), urinals, sinks, etc. and a vacuum pump in the form of a liquid ring pump of the screw type with an integrated grinder (7) for the creation of a vacuum in the pipe system and emptying of the toilets, etc. The liquid ring pump (7) is directly connected, via the vacuum hose/pipe, to the toilet(s) (1), urinal(s) or sink(s) and is arranged preferably close to the toilet(s) (1), urinal(s) or sink(s), and the operation of the liquid ring pump (7) in connection with each emptying of the toilet(s), etc. is time-controlled.

Description

ARRANGEMENT RELATED TO VACUUM SEWAGE SYSTEM
The present invention concerns vacuum drainage system, comprising a pipe system which is connected to one or a small number of toilets, urinals, sinks, etc. and a vacuum pump in the form of a liquid ring pump of the screw type with an integrated grinder for the creation of a vacuum in the pipe system and emptying of the toilets, etc.
EP patent no. 0 454 794 describes a prior art vacuum drainage system of the above type in which a liquid ring pump is used which is designed to maintain a constant vacuum in the drainage system and to empty the drainage system. A governor/pressure sensor controls the operation of the liquid ring pump in that the pump is started when the pressure in the drainage system exceeds a given value, for example as a consequence of leakage or in connection with emptying the toilet, etc. and the pump is stopped when a given vacuum has been achieved in the system. This solution is well suited for vacuum drainage installations with a large number of toilets, urinals, sinks, etc. However, a disadvantage of the solution is that energy will be used to maintain the vacuum as a consequence of leakages, which are not uncommon in large systems. The vacuum pump will thus also start and stop at random even if the system is not in use.
The present invention describes a solution which is particularly well suited for small installations with one or a small number of toilets, urinals, sinks, etc., for example in houses, public toilets, parts of buildings, cottages, pleasure boats or caravans. The solution is very simple and inexpensive and is based on the use of a liquid ring screw pump with an integrated grinder, as described in the above EP patent, to create, on the one hand, a vacuum to empty toilets, etc. and, on the other hand, to pump drainage water over into a tank, an established drainage system, a sewage treatment plant, etc. The solution uses very little energy as the vacuum pump is only started when the toilet is in use. The solution is based on intermittent operation, i.e. the pump is only in operation for each emptying/flushing operation, which is a clear advantage with regard to reliability and installation. Moreover, systems in accordance with the present invention generate less noise as they operate with less (lower) vacuum.
The present invention is characterised in that the liquid ring pump is arranged preferably close to the toilet(s) and is directly connected, via a vacuum hose/pipe, to the toilet(s), whereby the operation of the liquid ring pump in connection with each emptying of the toilet(s) is time-controlled, as defined in claim 1.
Dependent claims 2 - 5 define the advantageous features of the present invention.
The present invention will be described in further detail in the following by means of examples and with reference to the attached drawings, where:
Fig. 1 shows a diagram of a vacuum drainage system in accordance with the present invention,
Figs. 2 - 7 show alternative embodiments of the system shown in Fig. 1.
As shown in Figure 1 , the present invention comprises a liquid ring screw pump with an integrated grinder 7 which is directly connected to a toilet 1 via a vacuum hose 6.
The length of the vacuum hose 6 can be from 0.30 to 0.70 m in the case shown here. A valve 2, which is designed to be opened in connection with emptying the toilet, is arranged between the hose and the toilet. The valve 2 can expediently be driven by means of the vacuum of a piston/cylinder device integrated in the valve (not shown in detail). The valve 2 is controlled by an electrical control circuit (not shown in detail) fitted in an electrical switch cabinet 4. The vacuum drainage system works as follows: with a light touch on a start button 3 arranged on the toilet 1 , an electrical signal is given to the control circuit in the switch cabinet 4 via the cable 5 so that the pump 7 is started by means of an electrical signal via the cable 8. The pump operates for a few seconds so that a negative pressure is built up in the vacuum hose. The time for which the pump should operate is calculated and tested in each individual case and depends, among other things, on the length of the vacuum hose and the capacity of the pump. For example, in a system which the applicant has tested and which comprised only one toilet, it was found necessary to have a pump operating time of approximately 5 seconds. After the pump has been in operation for the necessary number of seconds to build up the vacuum in the hose 6, the control circuit gives a signal to a solenoid valve (not shown) arranged in connection with the drainage valve 2 so that it opens by means of the vacuum generated in the vacuum hose 6. The contents are sucked out of the toilet via the hose 6 to the pump 7 and pumped on by the pump through a drainage hose 9 to a tank, sewage treatment plant, etc. (not shown in detail). The pump expediently continues to operate for a short period of time, a few seconds, after emptying until the valve 2 closes and is thus ready for a new emptying operation. It should be noted that the emptying sequence also comprises a flushing operation for flushing the toilet. However, this involves nothing particularly new in relation to that which is already described in the applicant's EP patent mentioned above and will not, therefore, be described in further detail here.
The present invention thus concerns, as the above explains, a solution which comprises a combination of emptying of toilets, etc. by means of a vacuum (a vacuum side) and transport of the drainage liquid via a liquid ring pump by means of pumping (a pressure side) through a drainage hose 9. This makes it possible to pump the drainage water over large distances and to a higher level.
Regarding the pump 7, it can be driven pneumatically/hydraulically or by a DC or AC motor and its capacity (power) can vary. This means that the solution is very flexible and can also be used in situations where electricity is available only from a battery.
Although the present invention is primarily intended for small systems with one toilet, it is possible, as shown in Fig. 2, to adapt it to systems with two or more, preferably not more than ten, toilets 1 and, for example, a sink 11 (see Fig. 2). For wastewater from sinks, a collection tank 12 is used with a similar drainage valve 2 as for a toilet but where the pump is started by a level sensor (not shown in detail). The electronic control in the switch cabinet 4 controls the pump operating time, depending on which toilet or sink is to be emptied, as this will vary from vacuum system to vacuum system on account of the different lengths of the vacuum hoses 6 from each toilet/sink. In some situations it may be necessary to install a nonreturn valve (not shown) in each toilet branch pipe to prevent drainage liquid flowing to the toilets which are not in use.
Fig. 3 shows a compact solution in which the pump 7, valve 2 and control 4 are integrated in one unit in the toilet 1. This represents a very favourable solution where space is limited, for example in a boat or caravan.
Fig. 4 shows an alternative solution in which the toilet, instead of being fitted with a valve, is fitted with a water trap 13. Pressing the start button 3 starts the liquid ring pump 7 immediately and the contents are sucked out of the toilet. The operating time of the pump is set so that the toilet is emptied sufficiently, i.e. normally between 2 and 5 seconds for installations with one toilet.
In general, the control function for the vacuum drainage system in accordance with the present invention will be designed so that it is adjustable. Therefore, the operating time for the pump 7, the opening time for the drainage valve 2 and the flushing function for the toilet can be adjusted to the installation situation in question, for example the length of the vacuum hose 6.
Fig. 5 shows the same functional solution as Fig. 4, but designed in a compact format in which the pump 7, the electrical connection box 4 and the water trap 13 are integrated in the toilet 1. This solution will, as for the solution shown in Fig. 3 above, be particularly relevant for installation situations where space is limited.
Figs. 6 and 7 show further examples like those shown in Figs. 1 - 3, but where the operating time is controlled by means of a governor 14 instead of a time relay. When the toilet is emptied/flushed, i.e. when the button 3 is pressed, the pump 7 starts so that a vacuum is built up in the hose 6. A governor 14 arranged in the drainage hose (drainage pipe) 6 gives a signal to the control circuit in the control cabinet 4 so that the pump stops when the vacuum in the hose 6 has reached a level set in advance. At the same time, the control circuit gives a signal to the emptying valve and the flushing function to empty and flush the toilet. The operating time of the pump is therefore controlled here by means of the governor 14 arranged in the drainage pipe 6.
It should be noted that, although the figures and the text above show and describe solutions in which the pump is arranged close to the toilets/sinks, the present invention, as it is defined in the claims, can also be used in vacuum systems in which the distance is greater.

Claims

Claims
1. Vacuum drainage system, comprising a pipe and/or a hose system (6) which is connected to one or a small number of toilets (1), urinals, sinks, etc. and a vacuum pump in the form of a liquid ring pump of the screw type with an integrated grinder (7) for the creation of a vacuum in the pipe system and emptying of the toilets, etc., characterised in that the liquid ring pump (7) is directly connected, via the pipe/hose (6), to the toilet(s) (1) and is arranged preferably close to the toilet(s) (1) and that the operation of the liquid ring pump (7) in connection with each emptying of the toilet(s), etc. is time-controlled.
2. Vacuum drainage system in accordance with claim 1 in which each toilet or sink, etc. is fitted with a drainage valve (2), characterised in that the liquid ring pump (7), in connection with the emptying sequence for each toilet, is designed first to start and operate for a few seconds to establish a vacuum in the vacuum hose (6) between the toilet and the pump, and that the drainage valve (2) subsequently opens to empty the toilet (1), after which the valve is designed to close, while the pump stops shortly afterwards.
3. Vacuum drainage system in accordance with claim 1 , characterised in that the operating time of the liquid ring pump (7) is controlled by means of a time relay.
4. Vacuum drainage system in accordance with claim 1, characterised in that the operating time of the liquid ring pump (7) is controlled by means of a governor (14) arranged in the drainage pipe (6) of the toilet, whereas the pump (7), in connection with emptying/flushing the toilet (1), is running until the vacuum in the drainage pipe has reached a preset value.
5. Vacuum drainage system in accordance with claims 1-2, characterised in that each toilet is fitted with a water trap (13) and that, in connection with emptying the toilet (1), the liquid ring pump (7) is designed to start and thereby empty the toilet immediately.
PCT/NO2001/000214 2000-05-24 2001-05-23 Arrangement related to vacuum sewage system WO2001090495A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001264421A AU2001264421A1 (en) 2000-05-24 2001-05-23 Arrangement related to vacuum sewage system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20002661A NO20002661L (en) 2000-05-24 2000-05-24 Device by vacuum drainage system
NO20002661 2000-05-24

Publications (1)

Publication Number Publication Date
WO2001090495A1 true WO2001090495A1 (en) 2001-11-29

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NO (1) NO20002661L (en)
WO (1) WO2001090495A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146632A1 (en) * 2011-04-27 2012-11-01 Airbus Operations Gmbh Vacuum toilet having a urinal function
WO2017182698A1 (en) * 2016-04-19 2017-10-26 Evac Oy Method of controlling a vacuum waste system and a vacuum waste system
CN110670694A (en) * 2018-07-03 2020-01-10 成都金宝马数码技术有限公司 Method for adjusting toilet bowl drainage distance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699592A (en) * 1970-12-21 1972-10-24 Preformed Line Products Co Marine toilet assembly
US3878569A (en) * 1974-05-02 1975-04-22 Itt Sewage treatment device
WO1990010123A1 (en) * 1989-03-03 1990-09-07 Olav Hofseth Vacuum drainage system
US5317763A (en) * 1992-01-25 1994-06-07 Deutsche Aerospace Airbus Gmbh Apparatus for low noise flushing a vacuum toilet, especially in an aircraft
FI104437B (en) * 1998-07-01 2000-01-31 Evac Int Oy Drainage system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699592A (en) * 1970-12-21 1972-10-24 Preformed Line Products Co Marine toilet assembly
US3878569A (en) * 1974-05-02 1975-04-22 Itt Sewage treatment device
WO1990010123A1 (en) * 1989-03-03 1990-09-07 Olav Hofseth Vacuum drainage system
US5317763A (en) * 1992-01-25 1994-06-07 Deutsche Aerospace Airbus Gmbh Apparatus for low noise flushing a vacuum toilet, especially in an aircraft
FI104437B (en) * 1998-07-01 2000-01-31 Evac Int Oy Drainage system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146632A1 (en) * 2011-04-27 2012-11-01 Airbus Operations Gmbh Vacuum toilet having a urinal function
US9260850B2 (en) 2011-04-27 2016-02-16 Airbus Operations Gmbh Vacuum toilet having a urinal function
WO2017182698A1 (en) * 2016-04-19 2017-10-26 Evac Oy Method of controlling a vacuum waste system and a vacuum waste system
JP2019520496A (en) * 2016-04-19 2019-07-18 エバック オサケ ユキチュア Control method of vacuum disposal system and vacuum disposal system
US11391031B2 (en) 2016-04-19 2022-07-19 Evac Oy Method of controlling a vacuum waste system and a vacuum waste system
CN110670694A (en) * 2018-07-03 2020-01-10 成都金宝马数码技术有限公司 Method for adjusting toilet bowl drainage distance

Also Published As

Publication number Publication date
AU2001264421A1 (en) 2001-12-03
NO20002661L (en) 2001-11-26
NO20002661D0 (en) 2000-05-24

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