LU85797A1 - DEVICE FOR REMOVING WASTE WATER FROM A SHIP ON THE SHORE - Google Patents

Description

Λ -1 -

Device for removing waste water from a ship lying on the bank.

The invention relates to a device for emptying the ship on board a ship e.g. of a residential vessel with existing collection tanks for domestic wastewater using an on-site suction system.

5 In general, residential ships in particular drain directly onto surface water. Connection to a sewage system on the bank is generally not possible.

The use of a free gradient system poses 10 very big problems. There must be a firm connection between the ship and the shore, and the connection from the shore to the ship should always have a clear gradient. Since the ships have their discharge just above or below the water level, the 15 pipe in question must be placed very low or low. In practice, this is only possible in still water, where the water level does not change or hardly changes. Another problem is that the ship in question e.g. difficult to move for maintenance purposes. In view of the 20 necessary drainage, the construction of dams, the cost of digging in great depth on the quay is high. In addition, special precautions must be taken to freeze the sewage system.

-2-

From the above overview, it can be seen that a sewerage system based on a free slope for ships lying on the shore is very complex and therefore uninteresting.

5 One or more press pumps can also be used, through which domestic wastewater is pumped to the shore. In this case, special precautions must be taken, e.g. the installation of collecting tanks, electrical lines and fuses of the lines outside the ship to the shore before freezing. The public

Sewerage network extends to the pump on board. This requires precise regulation with regard to legal responsibilities and powers.

It is important that maintenance and control is carried out by the 15 municipal building authorities of the municipality concerned

To be carried out on board. However, one advantage of this system over the free slope system described above is that it is significantly cheaper.

It is also known to use an existing suction system on the bank, by means of which an on-board collecting tank for domestic wastewater can be emptied. Such a suction system is driven periodically after the ship to remove the existing wastewater. In this case, however, the suction system is not stationary, which is particularly important for 25 ships permanently on the quay, e.g. Houseboats are impractical in view of the need to periodically hate to remove wastewater.

The invention aims to design a device of the type mentioned in the introduction in such a way that it can work fully automatically, is not or only slightly sensitive to interference and e.g. the risk of freezing of the waste water in the pipeline between the quay and the ship is excluded.

For this purpose, the invention provides a device of the type mentioned, which is characterized by a permanent pipe connection between the tank and the 35 system, the part between the ship and the quay is formed by a harmonic tube, the length of which is chosen such that during the suction the pipe is shortened by shortening - i -3- due to the external pressure into an almost straight pipe.

The harmonica tube is shortened in operation due to the negative pressure inside, which creates a tight and short connection between the shore and the ship. Since a certain amount of air is sucked in with and with the waste water, almost no liquid remains in the hose, which eliminates the risk of freezing.

After switching off the suction system on the quay, the harmonica pipe can return to its original length, so that it depends more or less like a chain without the risk of accumulation of moisture in the lowest part, which could block the pipe due to freezing. Furthermore, the position of the connection point of the harmonic tube on the quay and on the ship can change within very wide limits, e.g. when the load on the ship changes or when the water level changes without affecting the effectiveness of the device.

The length of the harmonica tube and the location of the connection points on the ship and on the quay should be selected such that the harmonica tube can form the tight connection mentioned, but does not come into contact with the surface water in the rest position.

Maintenance by the municipal building authority can be carried out on the quay. There is a clear separation 25 between the public sewer network and that part of the sewer system that is the responsibility of the ship's owner or owner. Furthermore, the ship can be uncoupled very easily without in any way affecting the effect of the suction system on the quay and the Äbwasser-30 system on board.

The invention is explained in more detail with reference to the accompanying drawing. The figure shows a schematic section through part of a residential ship with a device according to the invention, which is connected to an existing suction system on the quay.

A residential ship 1 has a floor 2 and an inner floor 3. The ship 1 is located on the quay 4 and is connected to it by means not shown. The ship 1 is -4- t \ in the water 5. On board there is a toilet 6 with a discharge pipe 7. On board there are also e.g. a washstand, a washing machine, a dishwasher, etc., which are connected to a discharge pipe 8 via a schematically illustrated water connection 5 9. The discharge pipes 7 and 8 flow into one

Collection tank 10, which is housed in a housing 11. Thermal insulation material 12 is attached between the tank 10 and the housing 11 and is intended to rule out the risk of freezing.

10 The figure shows that the collecting tank 10 is one

Shaped that a discharge pipe 13, a discharge pipe 13 can be attached in a lower part, even when the ship 1 vibrates.

The tank 10 and the housing 11 have a manually operable door 14 for cleaning the inside of the collecting tank 10 by hand or by other means. A ventilation and ventilation pipe 15 with an odor trap 28 connects to the upper end of the tank 10.

For safety reasons, an overflow 18 is attached near the top of the 20 tank 10, which is closed off by a weight 19 or a spring-loaded flap 20. In the event of excessive filling with waste water 21 as a result of a fault in the device, the flap 20 opens, as a result of which the waste water 21 is poured onto the water 5.

25 In the collecting tank there is also a level detector 26 which is connected to a flexible detector line 17.

There is a suction system 22 on quay 4, which can be put into operation by the level detector 16, since the 30 detector line 17 is connected to the suction system 22 for control purposes. When the level of the waste water 21 in the collecting tank 10 exceeds a certain value, the level detector 16 emits a signal by which the suction system 22 acts to generate a vacuum in a suction pipe 23, which in the manner shown in FIG Discharge pipe 13 can be connected via connections 24, 25 which protrude from the quay 4 or the ship 1, which connection is formed by a harmonic tube 26.

-5- z k *

The harmonic tube 26 has in the rest position i.e. if the suction system 22 is ineffective, a sagging shape that; is indicated in the figure with full lines. If the suction system 22 is effective, prevails in the suction pipe 23, in the harmonica-5 pipe 26 and in the discharge pipe 13, whereby on the one hand sewage 21 is sucked out of the collecting tank 10 and discharged through a sewage pipe 27 and on the other hand harmonic pipe 26 due to the pressure difference between the surroundings and the inside of the tube 26 is shortened. The pipe 26. 10 is thereby stretched between the terminals 24 and 25, which is indicated by solid lines. The reference number 26 'is given.

• ä <*

Claims (1)

* -6- »> PATENT CLAIM Device for emptying a ship on board a quay e.g. of a residential ship existing collection tanks for domestic wastewater by means of a suction system available on the quay characterized by a permanent pipe connection between the tank and the system / whose part extending between the ship and the shore ^ is a harmonic tube, the length of which is chosen such that during the suction effect of this pipe is deformed into an almost straight pipe by shortening as a result of the external pressure.