DE2751352A1 - Control system for ship's bilge pumps - has separate level control valves in each well with all wells coupled to line by non-return valves - Google Patents

Abstract

The bilge pumping system for the ship has a single bilge line (10) between the separate wells (4, 5) and the main bulge pump. The wells are connected to the line by non return valves as well as control valves (7, 8) operated by the water level in the wells, to prevent air intake. The water level valves are coupled to the bilge pump control so that if one well has a set water level then the pump is activated. It is stopped when every well has been pumped to a set level.

Description

L e n z o rd r e d itio n g

The invention relates to a bilge device for bilge wells in cargo holds of ships whose bilge pump can be shut off with its suction side by means of valves Lcitungen is connected to the Lenzbrunnen.

It complies with the relevant regulations of the classification societies, that in the case of ships for all drainage lines for the drainage of the landing areas Non-return valve is provided so that no drainage from one hold to the other can flow. In addition, these check valves must be shut off to the Drain wells individually can. This is to prevent that the Lenzbrunneii is pumped empty first and with the lowest flow losses then air would be sucked in via this bilge well, while the others The bilge fountain could then not be emptied. These conditions require that all secondary bilge lines are equipped with fittings to the extent necessary, that all secondary bilge lines lead to the engine room or to the pipe trnnel, remote actuation of the fittings is then to be provided or to a main bilge line connected in the tanks with remote control of fittings arranged under water Need to become. In any case, a considerable structural effort is required, to achieve the desired function taking into account the existing regulations reach. The operation of well-known bilge systems for the bilge wells is also cumbersome in the holds of cargo ships, because the system is during the bilge process to be monitored so that emptied bilge wells are shut off from the fueling device can be used to prevent air from flowing in over these already emptied bilge wells impede.

An automatic suction device for Dilgenwasser is known in Pleasure boats which consist of a ball valve which closes a hole in the ship's side exists, which is opened by suction from the outside (Dt-OS 24 15 623).

There is no such facility for bilge wells in cargo ships suitable. The state of the art also includes automatic vacuum drainage for sludge on board ships for the transport of sludge mings (DT-OS 25 16 0), in which the drainage lines of the holds to a vacuum container are connected to the sludge water in the outside of the hold Vacuum container suction and pump out from there. There are gate valves in the drainage lines automatically through pressure sensors at each drainage connection controlled.

It is the object of the invention, the bilge process for the bilge well in the holds of cargo ships, especially dry cargo ships simplify or automate and, above all, the construction effort for to reduce the bilge.

According to the invention, this object is achieved in that in the to the bilge pump line of each bilge well one from the water level in the bilge well controlled float valve is arranged with a downstream check valve and that the float valve acts on the switch for driving the bilge pump and switches it on when the float valve opens, or switches it off when it closes.

The bilge fountain will only open when the float valve is fully open Pressing your switch is switched on. They are only switched off when the Float valve. If there are several wells, each float valve acts directly on the Switch on the pump while the float valve of the last emptied well the pump switches off. Such Control is expedient to achieve if for the activation of the bilge pump: a parallel connection.

on the other hand, a series connection is provided for switching off. This arrangement enables a single main bilge, which is about the middle of the ship or on the port or starboard side and which branch lines to the bilge wells in the holds of the ship. In each secondary bilge line a non-lockable non-return valve is installed, which the mutual Prevents water exchange between bilge wells in one or different cargo holds. The float valve provided according to the invention sits in front of this check valve. The latter opens when bilge water collects in the bilge fountain and closes automatically as soon as this water has been pumped out. A cone valve is advantageous, which is operated by a swimmer and which depending on the type of construction can be provided with a relief cone to provide sufficient buoyancy to obtain. It is not of crucial importance whether the fittings are in the Secondary bilge lines installed directly in the bilge well or outside of the bilge will. This essentially depends on the given location and the regulations the classification societies. An assembly of the fittings outside the bilge well can possibly lead to a further reduction in the structural effort. In any case, it must be ensured that the materials used are different Temperatures and the occurring impurities in the bilge water are sufficient Resi show stence.

An embodiment of the invention is shown schematically in the drawing shown.

The figures show: FIG. 1 the diagram of an automatic bilge system for three cargo holds Figure 2 shows the scheme of the fitting arrangement in a bilge well in one opposite 1 on an enlarged scale and FIG. 3 shows the diagram of the fitting arrangement outside of the bilge fountain.

FIG. 1 shows several cargo holds lying next to or one behind the other 1, 2 and 3 of a ship, otherwise not shown. On the floor of every hold a bilge 4, 5 or 6 is arranged, and in each bilge is located A pump sump 7, 8 or 9 separated by a small partition wall The secondary or branch line of the main drainage line 10 opens into the pump sump in these branch lines there is a float valve 11 for each bilge fountain 4, 5 and 6, 12 or 13 arranged, which is controlled by the water level in the transfer sump 7, 8 and 9, respectively will.

Downstream of each float valve 11, 12 or 13 a non-lockable check valve 21, 22 or 23. A lockable check valve 31 is located in the one leading to the bilge pump Main Nachlenzleitung 10. For the sake of clarity, the bilge pump was also not <! Arge - poses.

FIG. 2 shows that the fittings 11, 12 or 13 and 21, 22 or 23 can be arranged within the bilge fountain. Toi use gel angel advantageous commercially available float valves 11, 12 or 13 and commercially available switch valves 21, 22, 23. The branch line of the Nachlenzleitung is through the wall of the bilge well led out, this implementation being suitable to compensate for thermal movements. FIG. 2 shows an embodiment in which a J n is relatively large Always 24 arranged outside the housing of the actual float valve is.

In contrast, an arrangement from FIG. 3 is also advantageous commercially available fittings explained, in which both the actual float valve 11, 12 and 13, as well as the check valve 21, 22 and 23 outside the bilge well or the pump sump 7, 8 or 9 are mounted. Figure 3 also shows an embodiment, after which the float 24 is arranged together with the valve in a common housing is.

The function of the automatic bilge system is explained as follows. That I Bilge water that collects in the bilge fountain initially fills the pump sump in each Bilge well. As a result, the float 24 floats on and open that associated float valve, which the bilge well with the accumulating bilge water assigned. At the same time, this switching process starts the bilge pump set. It sucks out the Letizbrunnen first with the least amount of power loss. If this bilge well is emptied, the associated Schwitnmer valve closes and prevents thus sucking in air over this emptied bilge well. After that, the next bilge well emptied. This process is repeated for all bilge wells, until all the bilge wells are emptied. Then the flow of liquid in the bilge line breaks off and this bilge line is then only under the suction pressure of the bilge pump. With this bilge device, all bilge wells in a hold may be used respectively.

all bilge wells in different holds of a ship and in Engine room drained simultaneously without opening or closing a valve must become. The bilge period is much shorter than with systems according to the state of the art Technology. A bilge device according to the invention is particularly suitable when in use of centrifugal pumps as bilge pumps, because an automatic primer does not need to be in operation to be taken because no air can flow into the bilge pipes.

L e r s e i t e

Claims (3)

P a t e n t a n s p r ü c h e i.% Bilge device for bilge wells in the holds of ships, the bilge pump with their suction side by means of valves lockable lines to which Lenzbrunnen is connected, d n d u r c h S e k It is noted that in the line (10) leading to the bilge pump of each bilge well (4,5,6) a float valve controlled by the water level in the bilge well (11,12,13) is arranged with a downstream check valve (21,22,23) and that the float valve acts on the switch for the drive of the bilge pump and this on opening of the float valve switches on or switches off when it closes. 2. Bilge device for ships with a number of bilge wells, according to Claim 1, d n d u r c h g e k e n n z e i c ii n e t, which the bilge well means Branch lines are connected to a common main bilge line (10). 3. bilge device according to claims 1 and 2, d a d u r c h g e it is not indicated that the float valve (11, 12, 13) and the non-return valve (21,22,23) arranged as prefabricated healers outside the bilge fountain (4,5,6) are.