KR200439896Y1 - Structure for addressing oil residual in cargo pump of ship - Google Patents

Abstract

The present invention has a structure for processing the residual amount of liquid cargo, such as oil of a ship cargo pump, including a liquid cargo tank 20 containing a liquid cargo, a part of the bottom surface 22 of the liquid cargo tank 20 Form a recessed suction recess 24, and a suction port through which liquid cargo flows into the impeller 17 of the cargo pump for the ship is installed to have a constant height H with the bottom surface of the suction recess 24. In the ship cargo pump, the suction port projection (18) is installed at least partially fixed to the outside of the end of the inlet for the liquid cargo flow into the impeller (17) of the ship cargo pump; A coupling long groove 42 fitted to the suction inlet projection 18 is installed, and is radially extended from the suction inlet and is smaller than a constant height H that forms the bottom of the suction recess 24. It includes a liquid hydrate remaining amount control volume 40 installed to occupy a predetermined space in the suction recess 24 at a height.

Cargo pump, ship, liquid cargo, residual quantity

Description

Liquid Cargo Residue Treatment Structure of Marine Cargo Pumps {STRUCTURE FOR ADDRESSING OIL RESIDUAL IN CARGO PUMP OF SHIP}

1 is a schematic view showing the overall structure of a conventional general marine cargo pump.

Figure 2 is a schematic diagram showing an example of the liquid cargo residual amount treatment structure of the marine cargo pump according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a coupling state between the intake port and the liquefied residual volume control volume according to an embodiment of the present invention.

Figure 4 is a perspective view showing a state before the inlet and the liquid hydrate remaining volume control volume combined according to an embodiment of the present invention.

<Brief description of the major symbols in the drawings>

L: Liquid residual amount surface

H: suction port height (liquid residual amount height)

20: liquid cargo tank

22: liquid cargo tank bottom

24: suction well

40 liquid phase residual amount control volume

18: suction port projection

42: combined long groove

The present invention relates to a structure for processing the residual amount of liquid cargo, such as oil in a ship cargo pump, more specifically, the liquid cargo tank by attaching to detach the volume for controlling the liquid residual amount to the inlet port of the ship cargo pump The present invention relates to a liquid cargo residual amount treatment structure of a new marine cargo pump, which minimizes the liquid phase residual amount space in a suction well of the cargo pump, thereby minimizing the liquid level in the cargo tank of the cargo pump.

Generally, the transfer device for unloading or unloading cargo on a ship uses a cargo pump using hydraulic pressure. 1 shows the general structure of such a conventional cargo pump. As shown, the cargo pump is partially submerged in the liquid cargo tank 20 containing the lower liquid cargo. The cargo pump has a purging gas of air 1 on the upper part of the cargo pump. , Flow control valve (2), gas separator (3), leak check inlet (4), system oil inlet (5), system oil outlet (system oil outlet) (6), support pipe (7), leak check outlet (8), discharge pipe (9), stripping pipe ( 10), system oil drain (11), hydraulic motor (12), bearing (13) (15), shaft (14), mechanical seal 16, and impellers 17 and the like.

Such cargo pumps perform discharging, stripping, purging and leakage checks, and the like, as is well known in the art. In the discharging operation, the cargo pump may be operated after pressurizing the hydraulic liquid cargo in the main line. The flow control lever can regulate the speed of the hydraulic motor through the hydraulic pilot valve, whereby the cargo pump can discharge the cargo to the port. The emptying of the cargo in the last stage of the discharge operation can be done with a stripping operation. First, the cargo outlet valve is closed and then air, inert gas, or nitrogen is injected during the low speed cargo pump operation, ie during the dry operation. During the dry running of the cargo pump the pump impeller acts as a non-return valve of the cargo line, so that a stripping operation can be made.

In the cargo pump structure, the liquidate in the liquidate tank 20 needs to be discharged completely before and after the start of the pump operation, which can identify whether there is a leak of hydraulic liquidate in the liquidate tank 20. To do that.

As shown in FIG. 1, a portion of the bottom face 22 of the liquefied tank 20 forms a recessed well recessed suction 24. A suction port through which the impeller 17 portion of the pump sucks the liquid cargo is provided at a predetermined height, for example, about 50 mm away from the liquid tank bottom surface 22. The surface of the liquefied residual amount is determined according to the height of the suction port, which corresponds to the line indicated by L in the drawing. Therefore, even if all of the liquefied liquid is sucked out and discharged, the liquefied liquid filling the suction port, that is, between the L line and the bottom surface 22 always remains in the liquefied tank 20. (The amount of liquid liquefied thus left for convenience of explanation is referred to as liquefied residual amount below)

In order to minimize this liquid residual amount, it is desirable to install the inlet of the pump as close to the tank bottom 22 as possible, but if it is too close, the vibration / noise may increase due to the cavitation, or the flow pressure resistance in the pump may increase, resulting in durability. In addition to this drop, there is a problem that the maintenance of the pump is difficult, so a minimum gap is necessary between the inlet port and the tank bottom 22. As a result of the experiment, the above problems can be minimized when installing at a distance of about 50 mm. Has been found.

In this case, however, the amount of liquid liquefied residues varies depending on the capacity of the liquid liquefied tank 20. However, in the case of a general ship cargo pump, for example, an amount of about 75 liters remains. Not only is it a wasteful factor of the presence of useless liquefaction, but it also makes it difficult to reliably identify whether a liquefied liquid leaks in the liquefied tank 20 as described above. There is a need for a technique that can solve the problems.

The present invention is designed to solve the above-mentioned conventional problems, and in particular, the suction port of the liquid cargo tank is attached to a suction port of a ship cargo pump so as to be detachably attached to the suction port. It is an object of the present invention to provide a liquid cargo residual amount treatment structure of a new marine cargo pump which reduces the liquid phase residual amount space so that the liquid phase residual amount in the liquid phase tank of the cargo pump can be minimized.

The above object is achieved by a liquefied residual amount treatment structure through a liquefied residual amount adjusting volume attached to a suction port of a marine cargo pump, which is provided according to the present invention.

In order to minimize the liquid cargo residual amount of the marine cargo pump, the liquid cargo residual amount treatment structure of the marine cargo pump according to an aspect of the present invention,

And a liquid cargo tank containing a liquid cargo, wherein a part of the bottom surface of the liquid cargo tank forms a recessed suction recess, and a suction port through which the liquid cargo flows into the impeller of the ship cargo pump has a bottom surface of the suction recess. And a cargo pump for a ship installed with a constant height (H), comprising: an inlet projection formed outside an end of an intake port through which liquid cargo flows into an impeller of the ship cargo pump; In the suction recess, a coupling long groove is installed to be detachably attached to the suction port projection, and is extended radially from the suction port and smaller than a constant height H that is formed with the bottom surface of the suction recess. And a liquidus residual amount adjusting volume installed to occupy a predetermined space.

In a preferred embodiment, the liquid cargo residual amount treatment structure of the marine cargo pump according to an aspect of the present invention,

A liquid cargo tank is provided, and a portion of the bottom surface of the liquid cargo tank forms a recessed suction recess, and a suction port through which the liquid cargo flows into the impeller of the ship cargo pump has a constant height (H). A ship cargo pump installed with a ship, comprising: an inlet screw formed outside an end of an inlet port through which liquid cargo flows into an impeller of the ship cargo pump; An opposite screw fitted to the suction port screw detachably is installed, and at the same time, the suction port extends radially from the suction port and has a height smaller than a constant height H that forms the bottom surface of the suction recess. And a liquidus residual amount adjusting volume installed to occupy a predetermined space.

Hereinafter, with reference to the accompanying drawings a specific embodiment of the present invention will be described in detail.

1 is a schematic view showing the overall structure of a conventional general marine cargo pump, Figure 2 is a schematic diagram showing an example of the liquid cargo residual amount treatment structure of the marine cargo pump according to a preferred embodiment of the present invention. Figure 3 is a cross-sectional view showing a coupling state of the inlet and the liquefied residual volume control volume in accordance with a preferred embodiment of the present invention, Figure 4 is a combination of the intake and liquefied residual volume control volume in accordance with a preferred embodiment of the present invention A perspective view showing the entire state.

The liquid cargo residual amount treatment structure of the ship cargo pump according to an aspect of the present invention is to improve the structure of the conventional ship cargo pump shown in FIG. In particular, the present invention relates to a liquid cargo residual amount treatment structure for minimizing the liquid cargo residual amount of a ship cargo pump. In particular, the structure of the present invention improves the structure of the suction recess 24 of the conventional liquid liquefied tank 20, and by adding a volume of a volume in the suction recess 24 space, the suction recess 24 It reduces the space occupied by the liquefied liquid, which must remain.

Specifically, the ship cargo pump according to the present invention is provided with a liquid cargo tank 20 containing a liquid cargo, a portion of the bottom surface 22 of the liquid cargo tank 20 recessed suction recess 24 Forming, the inlet for the liquid inflow into the impeller 17 of the ship cargo pump may be applied to both the bottom surface of the suction concave portion 24 is installed with a predetermined height (H).

In the marine cargo pump according to the present invention, in particular, all or part of the liquid cargo residual amount control volume 40 by combining the coupling field groove 42 formed in the liquid residual amount control volume and the inlet projections 18 installed at the inlet. Is located below the suction port, consequently reducing the space occupied by the residual amount of liquefied liquid. The suction inlet protrusion 18 is a protrusion shape which is at least partially fixed to an outer side of an end of the suction inlet through which the liquid cargo flows into the impeller 17 of the ship cargo pump.

A coupling field groove 42 may be integrally formed in the liquid hydrate remaining amount adjusting volume 40 which is detachably coupled to the suction hole protrusion 18. The coupling field groove 42 is a part press-coupled to the suction inlet protrusion 18, and may be any shape provided that only the groove corresponding to the suction inlet protrusion 18 is satisfied. The liquid cargo remaining amount adjusting volume 40 extends radially from the suction port, and the suction recess 24 has a height smaller than a constant height H formed at the bottom surface of the suction recess 24. It is installed to occupy a predetermined space within. In fact, the space occupied by the conventional liquid residual amount by the volume of the liquid residual amount control volume 40 will be able to be reduced.

In a preferred embodiment of the present invention, a screw is formed outside the end of the suction port (not shown) and the liquid cargo residual amount control volume 40 fitted to be detachably attached to the suction port is opposite to the screw of the suction port. Can be installed and combined. Accordingly, it is possible to appropriately select the volume 40 of the desired form, and it may be provided that the maintenance is easy even after installation.

The present invention has been described above with reference to specific embodiments, but the scope of the present invention is not limited to the described examples, and those skilled in the art, that is, those skilled in the art based on the disclosed contents Various modifications and changes are possible by applying common knowledge. Therefore, it is pointed out that the scope of the present invention should be interpreted by the appended claims rather than by the examples described.

As described above, according to the present invention, the liquid-liquid residual amount space in the suction well of the liquid-liquid tank is reduced by attaching detachably a volume for controlling the liquid-liquid residual amount to the suction port of the ship cargo pump. Therefore, it has a remarkable effect, such as providing a liquid cargo residual amount treatment structure of the new marine cargo pump to minimize the liquid residual amount in the liquid cargo tank of the cargo pump.

Claims (2)

A liquid cargo tank 20 containing a liquid cargo is provided, and a portion of the bottom surface 22 of the liquid cargo tank 20 forms a recessed suction recess 24, and an impeller of the ship cargo pump ( In the cargo cargo pump for ships, the suction port into which the liquid cargo flows into 17) is installed to have a constant height H with the bottom surface of the suction recess 24. A suction port protrusion (18) formed outside the end of the suction port through which the liquid cargo flows into the impeller (17) of the ship cargo pump; A coupling long groove 42 fitted to the suction inlet projection 18 is installed, and is radially extended from the suction inlet and is smaller than a constant height H that forms the bottom of the suction recess 24. A liquid cargo residual amount control structure of a cargo pump for a ship, characterized in that it comprises a liquid cargo residual amount control volume (40) installed to occupy a predetermined space in the suction recess (24) at a height. It has a liquid cargo tank 20, a portion of the bottom surface 22 of the liquid cargo tank 20 forms a recessed suction recess 24, the liquid cargo to the impeller 17 of the ship cargo pump In the cargo pump for ships in which the intake port which flows in is provided with the bottom surface of the said suction concave part 24, and fixed height H, A suction port screw formed outside the end of the suction port through which the liquid cargo flows into the impeller 17 of the ship cargo pump; At the same time an opposing screw fitted to the suction port screw is installed, the suction recess has a height smaller than a constant height H extending radially from the suction port and the suction port forming the bottom surface of the suction recess 24. A liquid cargo residual amount treatment structure of a cargo pump for a ship, characterized in that it comprises a liquid cargo residual amount adjusting volume (40) installed to occupy a predetermined space in (24).

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