Ballast water tank drain pipe and ballast water tank

Abstract

The present invention provides a drainage pipeline for a ballast tank and a ballast tank. The drainage pipeline of the ballast tank includes: a ballast water pipe, which is communicated with the ballast tank; a tank cleaning water pipe, which is communicated with the ballast tank and is spaced apart from the ballast water pipe, and the diameter of the ballast water pipe is larger than that of the tank cleaning water pipe; a ballast and tank cleaning main pipe, which communicates the ballast water pipe and the tank cleaning water pipe; a ballast pump, which is communicated with the ballast and tank cleaning main pipe to discharge the water in the ballast tank through the ballast and tank cleaning main pipe, the ballast water pipe and the tank cleaning water pipe. The drainage pipeline of the ballast tank of the present invention can reduce the number of arranged drainage pipelines, reduce the weight of the ship, and improve the drainage efficiency.

Description

Technical Field

[0001] The present invention relates to the field of ships, and particularly to a drainage pipeline for a ballast water tank and a ballast water tank. Background Art

[0002] The ballast water tank is used to inject seawater during the operation and work of the ship to adjust the ship's stability, and it is an essential liquid tank on the ship. The seawater injected into the liquid tank needs to be discharged. There are two modes during the discharge process: the initial large-capacity discharge, which is achieved by a large ballast pump; the later cleaning of the remaining water, which is achieved by a stripping pump. Since the discharge capacity of the ballast pump is large, the corresponding pipe diameter is also relatively large, so the height from the bottom deck of the tank is relatively high. At the same time, because there are many structural members on the bottom deck of the tank, a lot of water still remains uncleared after draining through the ballast pump. At this time, only a small-displacement stripping pump can be used for cleaning.

[0003] The conventional design of the stripping pipeline is to design a stripping main pipe, usually a ring main pipe, which is individually connected to the stripping main pipe through a stripping pump, and then the stripping main pipe is respectively connected to each ballast water tank for stripping operation.

[0004] The problem with such a conventional stripping design is that it increases the pipeline length, layout and weight, which is very disadvantageous for special engineering ships with strict requirements on ship weight and space. Taking a 200-meter-long ship as an example, considering the layout of the ballast water tank from the bow to the stern of the ship, the length of the stripping ring main pipe to be designed needs to be about 400 meters long, and the weight is also about ten-odd tons, which has a very adverse impact on the economy of the ship from construction to operation. Summary of the Invention

[0005] Aiming at the above problems of the prior art, the purpose of the present invention is to provide a drainage pipeline for a ballast water tank and a ballast water tank, which can reduce the number of drainage pipelines arranged, reduce the weight of the ship, and improve the drainage efficiency.

[0006] To solve the above problems, on the one hand, the present invention provides a drainage pipeline for a ballast water tank, and the drainage pipeline for the ballast water tank includes:

[0007] A ballast water pipe, which is communicated with the tank body of the ballast water tank;

[0008] A stripping water pipe, which is communicated with the tank body and is spaced apart from the ballast water pipe, and the pipe diameter of the ballast water pipe is larger than that of the stripping water pipe;

[0009] A ballast stripping main pipe, which communicates the ballast water pipe and the stripping water pipe;

[0010] A ballast pump, the ballast pump being connected to the ballast scavenging main pipe to discharge the water in the cabin through the ballast scavenging main pipe, the ballast water pipe and the scavenging water pipe.

[0011] Further, the drainage pipe of the ballast water tank further includes:

[0012] A scavenging pump, the scavenging pump being connected to the ballast scavenging main pipe and spaced apart from the ballast pump, and the flow rate of the scavenging pump being lower than the flow rate of the ballast pump.

[0013] Further, the flow rate of the scavenging pump is 50 - 150 cubic meters per hour, and the flow rate of the ballast pump is 850 - 950 cubic meters per hour.

[0014] Further, both the ballast water pipe and the scavenging water pipe include a plurality of them. Taking one ballast water pipe and its adjacent one scavenging water pipe as a group of drainage pipes, multiple groups of the drainage pipes are arranged at intervals.

[0015] Further, the drainage pipe of the ballast water tank further includes:

[0016] A plurality of ballast branch valves, the plurality of ballast branch valves being connected to the plurality of ballast water pipes in one - to - one correspondence;

[0017] A plurality of scavenging branch valves, the plurality of scavenging branch valves being connected to the plurality of scavenging water pipes in one - to - one correspondence.

[0018] Further, the plurality of ballast branch valves and the plurality of scavenging branch valves are solenoid valves.

[0019] On the other hand, the present invention provides a ballast water tank, the ballast water tank including:

[0020] A cabin; and

[0021] A drainage pipe arranged in the cabin.

[0022] Further, the drainage pipe includes a scavenging pump, ballast branch valves and scavenging branch valves, and the ballast water tank further includes:

[0023] A controller, the controller being connected to the ballast pump, the scavenging pump, the plurality of ballast branch valves and the plurality of scavenging branch valves for controlling the operation of the ballast branch valves, the ballast pump, the scavenging pump and the scavenging branch valves.

[0024] Further, the ballast water tank further includes:

[0025] A water level tester, the water level tester being arranged in the cabin for detecting the water level in the cabin,

[0026] The controller is also connected to the water level tester. When the water level detected by the water level tester is greater than the predetermined water level, a plurality of the ballast branch pipe valves and the ballast pump are opened, and a plurality of the stripping branch pipe valves and the stripping pump are closed. When the water level detected by the water level tester is less than the predetermined water level, a plurality of the stripping branch pipe valves and the stripping pump are opened, and a plurality of the ballast branch pipe valves and the ballast pump are closed.

[0027] Further, the controller is a programmable logic controller.

[0028] Due to the above technical solution, the present invention has the following beneficial effects:

[0029] According to the drainage pipeline of the ballast tank of the embodiment of the present invention, in the initial stage of drainage, the ballast pump discharges a large amount of water through the large-diameter ballast water pipe and the ballast stripping main pipe, improving the drainage efficiency. In the later stage of drainage, the ballast pump discharges the remaining water at the bottom of the tank through the small-diameter stripping water pipe and the ballast stripping main pipe, so that the water in the tank body of the ballast tank can be discharged completely. By using one ballast stripping main pipe to replace one ballast main pipe and one stripping main pipe of the existing drainage pipeline, the pipeline layout can be reduced, space can be saved, the weight of the ship can be reduced. At the same time, the diameter of the ballast stripping main pipe is relatively large, effectively reducing the flow resistance of the pipeline and improving the drainage efficiency, which has positive benefits for the construction and operation of the ship. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a structural diagram of a ballast tank according to an embodiment of the present invention.

[0032] 100, tank body; 200, ballast stripping main pipe; 310, stripping pump; 320, ballast pump; 410, stripping branch pipe valve; 420, ballast branch pipe valve; 510, stripping water pipe; 520, ballast water pipe. Detailed Embodiments

[0033] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solution in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification of the present invention and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] Next, the drainage pipeline of the ballast tank in the embodiment of the present invention will be described.

[0036] As Figure 1 shown, the drainage pipeline of the ballast tank in the embodiment of the present invention includes: a ballast water pipe 520, a stripping water pipe 510, a ballast stripping main pipe 200, and a ballast pump 320.

[0037] First, the ballast water pipe 520 and the stripping water pipe 510 will be described. The ballast water pipe 520 is connected to the hull 100 of the ballast tank. The stripping water pipe 510 is connected to the hull 100 and is spaced apart from the ballast water pipe 520. The diameter of the ballast water pipe 520 is larger than that of the stripping water pipe 510.

[0038] The ballast water pipe 520 has a larger diameter, which can drain water in a large capacity and improve the drainage efficiency. The stripping water pipe 510 has a smaller diameter, which can drain the remaining water at the bottom of the tank.

[0039] Next, the ballast stripping main pipe 200 will be described. The ballast stripping main pipe 200 connects the ballast water pipe 520 and the stripping water pipe 510.

[0040] By using one ballast stripping main pipe 200 to replace one ballast main pipe and one stripping main pipe of the existing drainage pipeline, the pipeline layout can be reduced, space can be saved, the weight of the ship can be reduced. At the same time, the diameter of the ballast stripping main pipe 200 is larger, effectively reducing the flow resistance of the pipeline and improving the drainage efficiency, which has positive benefits for the construction and operation of the ship.

[0041] Finally, the ballast pump 320 will be described. The ballast pump 320 is connected to the ballast stripping main pipe 200 to drain the water in the ballast tank through the ballast stripping main pipe 200, the ballast water pipe 520, and the stripping water pipe 510.

[0042] For the drain pipe of the ballast water tank above, at the initial stage of drainage, the ballast pump 320 discharges a large amount of water through the large-diameter ballast water pipe 520 and the ballast stripping main pipe 200 to improve the drainage efficiency. At the later stage of drainage, the ballast pump 320 discharges the remaining water at the bottom of the tank through the small-diameter stripping water pipe 510 and the ballast stripping main pipe 200, so that the water in the hull 100 of the ballast water tank can be discharged completely. By using one ballast stripping main pipe 200 to replace one ballast main pipe and one stripping main pipe of the existing drain pipe, the pipeline layout can be reduced, space can be saved, the weight of the ship can be reduced. At the same time, the diameter of the ballast stripping main pipe 200 is relatively large, which effectively reduces the flow resistance of the pipeline and can improve the drainage efficiency, bringing positive benefits to the construction and operation of the ship.

[0043] According to some embodiments of the present invention, the drain pipe further includes a stripping pump 310. The stripping pump 310 is connected to the ballast stripping main pipe 200 and is spaced apart from the ballast pump 320. The flow rate of the stripping pump 310 is lower than that of the ballast pump 320.

[0044] At the initial stage of drainage, the ballast pump 320 with a large flow rate can be turned on for large-capacity discharge. At the later stage of drainage, the ballast pump 320 is turned off and the stripping pump 310 with a small flow rate is turned on for small-capacity drainage. Thus, energy can be saved.

[0045] Optionally, the flow rate of the stripping pump 310 is 50 - 150 cubic meters per hour, and the flow rate of the ballast pump 320 is 850 - 950 cubic meters per hour. For example, the flow rate of the stripping pump 310 is 100 cubic meters per hour, and the flow rate of the ballast pump 320 is 900 cubic meters per hour.

[0046] The stripping pump 310 and the ballast pump 320 with such flow rates cooperate with each other, enabling a relatively high drainage efficiency and being able to discharge the remaining water completely.

[0047] According to some embodiments of the present invention, both the ballast water pipe 520 and the stripping water pipe 510 include multiple ones. Taking one ballast water pipe 520 and an adjacent stripping water pipe 510 as a group of drain pipes, multiple groups of drain pipes are arranged at intervals.

[0048] The ballast stripping main pipe 200 is connected to multiple groups of drain pipes arranged at intervals, so as to be able to drain water from multiple positions of the hull 100 of the ballast water tank simultaneously, further improving the drainage efficiency. A group of drain pipes includes an adjacent ballast water pipe 520 and a stripping water pipe 510, so that each group of drain pipes can have a relatively high drainage efficiency and can discharge the remaining water completely.

[0049] Further, the drain pipe of the ballast water tank further includes a plurality of ballast branch valves 420 and a plurality of stripping branch valves 410. The plurality of ballast branch valves 420 are connected to the plurality of ballast water pipes 520 in one-to-one correspondence. The plurality of stripping branch valves 410 are connected to the plurality of stripping water pipes 510 in one-to-one correspondence.

[0050] In the initial stage of drainage, only the ballast branch valves 420 can be opened to increase the negative pressure of the ballast water pipes 520, reduce the flow resistance of the ballast water pipes 520, and discharge the water in the hull 100 of the ballast water tank through the ballast water pipes 520. In the later stage of drainage, only the stripping branch valves 410 can be opened to increase the negative pressure of the stripping water pipes 510, reduce the flow resistance of the stripping water pipes 510, and discharge the water in the hull 100 of the ballast water tank through the stripping water pipes 510.

[0051] Optionally, the plurality of ballast branch valves 420 and the plurality of stripping branch valves 410 are solenoid valves. Solenoid valves facilitate the realization of automatic control, thereby avoiding manual valve turning by operators and improving the convenience of operation for operators.

[0052] Next, the ballast water tank according to the embodiments of the present invention will be described.

[0053] As Figure 1 shown, the ballast water tank according to the embodiments of the present invention includes a hull 100 and a drain pipe provided in the hull 100. The drain pipe is the above-mentioned drain pipe.

[0054] According to some embodiments of the present invention, the drain pipe includes a stripping pump 310, ballast branch valves 420, and stripping branch valves 410. The ballast water tank further includes a controller. The controller is connected to the ballast pump 320, the stripping pump 310, the plurality of ballast branch valves 420, and the plurality of stripping branch valves 410, and is used to control the operation of the ballast branch valves 420, the ballast pump 320, the stripping pump 310, and the stripping branch valves 410.

[0055] In the initial stage of drainage, through the controller, only the ballast pump 320 can be controlled to drain the ballast water tank through the ballast water pipes 520, and the valves of the stripping water pipes 510 and the stripping pump 310 are closed. In the later stage of drainage, through the controller, only the stripping pump 310 is controlled to drain the ballast water tank through the stripping water pipes 510, and the stripping water pipes 510 and the stripping pump 310 are closed. Through the control of the controller, automatic operation can be achieved, and the efficiency can be improved.

[0056] Optionally, the controller is a programmable logic controller (PLC). The programmable logic controller has high reliability and strong anti-interference ability, which improves the stability of controller control.

[0057] Further, the ballast tank further includes a water level tester. The water level tester is disposed within the tank body 100 for detecting the water level within the tank body 100. The controller is also connected to the water level tester. When the water level detected by the water level tester is greater than the predetermined water level, a plurality of ballast branch valves 420 and the ballast pump 320 are opened, and a plurality of stripping branch valves 410 and the stripping pump 310 are closed. When the water level detected by the water level tester is less than the predetermined water level, a plurality of stripping branch valves 410 and the stripping pump 310 are opened, and a plurality of ballast branch valves 420 and the ballast pump 320 are closed. Wherein, the predetermined water level may be the water level at which it is difficult or impossible for the ballast water pipe 520 to drain the ballast tank.

[0058] The controller automatically switches the drainage pipeline and the drainage pump according to the water level of the tank body 100 of the ballast tank detected by the water level tester, reducing the switching time of the drainage pipeline and the drainage pump and improving the efficiency.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drainage pipeline for a ballast water tank, comprising: a ballast water pipe, the ballast water pipe being communicated with the hull of the ballast water tank; a stripping water pipe, the stripping water pipe being communicated with the hull and spaced apart from the ballast water pipe, the diameter of the ballast water pipe being larger than that of the stripping water pipe; a ballast stripping main pipe, the ballast stripping main pipe communicating the ballast water pipe and the stripping water pipe; a ballast pump, the ballast pump being communicated with the ballast stripping main pipe to discharge the water in the hull through the ballast stripping main pipe, the ballast water pipe and the stripping water pipe; a stripping pump, the stripping pump being communicated with the ballast stripping main pipe and spaced apart from the ballast pump, the flow rate of the stripping pump being lower than that of the ballast pump, the flow rate of the stripping pump being 50 - 150 cubic meters per hour, the flow rate of the ballast pump being 850 - 950 cubic meters per hour, both the ballast water pipe and the stripping water pipe comprising a plurality of pipes, and taking one ballast water pipe and an adjacent stripping water pipe as a group of drainage pipelines, and multiple groups of drainage pipelines being arranged at intervals; a plurality of ballast branch valves, the plurality of ballast branch valves being connected to the plurality of ballast water pipes in one - to - one correspondence; a plurality of stripping branch valves, the plurality of stripping branch valves being connected to the plurality of stripping water pipes in one - to - one correspondence, and the plurality of ballast branch valves and the plurality of stripping branch valves being solenoid valves.

2. A ballast water tank, characterized in that it comprises: a hull; and a drainage pipeline arranged in the hull, and the drainage pipeline is the drainage pipeline of claim 1.

3. The ballast water tank according to claim 2, characterized in that the drainage pipeline comprises a stripping pump, ballast branch valves and stripping branch valves, and the ballast water tank further comprises: a controller, the controller being connected to the ballast pump, the stripping pump, the plurality of ballast branch valves and the plurality of stripping branch valves for controlling the operation of the ballast branch valves, the ballast pump, the stripping pump and the stripping branch valves.

4. The ballast water tank according to claim 3, characterized in that it further comprises: a water level tester, the water level tester being arranged in the hull for detecting the water level in the hull, and the controller is further connected to the water level tester. When the water level detected by the water level tester is greater than a predetermined water level, the plurality of ballast branch valves and the ballast pump are opened, and the plurality of stripping branch valves and the stripping pump are closed; when the water level detected by the water level tester is less than the predetermined water level, the plurality of stripping branch valves and the stripping pump are opened, and the plurality of ballast branch valves and the ballast pump are closed.

5. The ballast water tank according to claim 3, characterized in that the controller is a programmable logic controller.

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