A fast emptying ballast tank

Abstract

The present invention relates to a fast-emptying ballast tank, which belongs to the technical field of ship ballast tank design. A fast-emptying ballast tank includes a ballast water tank, at the bottom of the ballast water tank, a guide trough is arranged outside the ballast water tank, and the direction of the guide trough is perpendicular to the direction of the upwardly protruding frame at the bottom of the ballast water tank; a guide hole is set at a position between several adjacent frames to keep the ballast water tank and the guide trough connected; at least one ballast water tank water outlet is provided at the bottom of the guide trough. During drainage operations, the ballast water is no longer discharged directly from the ballast water tank, but flows into the guide trough through the guide hole and then discharged. The diameter of the guide hole is much larger than the diameter of the water flow hole in the original design, and is not easy to be blocked, which greatly increases the drainage flow rate; the guide trough frame does not occupy the space in the guide trough, which solves the problem of the frame in the tank occupying the flow volume, increases the circulation area, and increases the drainage flow rate, thereby increasing the drainage efficiency.

Description

Technical Field

[0001] The invention relates to a fast-emptying ballast tank, belonging to the technical field of ship ballast tank design. Background Art

[0002] Some types of ships use ballast water loading and draining to rise and dive, changing the ship's buoyancy and completing engineering operations. Therefore, reducing the time required to load and drain ballast water will reduce working time and improve work efficiency.

[0003] The frames and girders within ballast tanks are generally large, occupying a larger volume. This reduces the flow area during drainage, reduces emptying efficiency, and directly increases work time. To improve ballast water emptying efficiency, most current designs employ inclined ballast tanks and incorporate holes in the webs of the frames and girders within the tanks. Inclined ballast tanks facilitate water flow; flow holes are placed near the base of the frames to minimize obstruction to water flow; and holes are placed in the webs of the girders to increase the flow area.

[0004] However, the openings on the aggregate are generally small in diameter and widely spaced, which has a very limited effect on increasing the ballast water flow rate and has the following obvious shortcomings:

[0005] 1) Drain holes have limited effect on increasing water flow rate. Relevant regulations have strict restrictions on the diameter, spacing, and placement of drain holes. A small diameter and large spacing between drain holes will not improve drainage efficiency.

[0006] 2) The water holes are easily clogged. The sediment, impurities, and pollutants contained in the seawater can easily cause the water holes to be clogged. Improper welding may also clog the water holes, further reducing drainage efficiency. Summary of the Invention

[0007] The purpose of the present invention is to provide a rapid ballast tank emptying system, which can significantly increase the ballast water loading and emptying efficiency and can cooperate with a rapid ballasting system; specifically, by increasing the circulation area, the ballast water flow rate is greatly increased, thereby increasing the emptying efficiency, completing rapid drainage, reducing working time, and achieving the purpose of improving work efficiency.

[0008] The present invention adopts the following technical solutions:

[0009] A rapid ballast tank is provided, comprising a ballast water tank 1. A guide groove 2 is provided at the bottom of the ballast water tank 1 and located outside the ballast water tank 1. The direction of the guide groove 2 is perpendicular to the direction of the upwardly protruding frame 4 at the bottom of the ballast water tank; diversion holes 4 are provided at positions selected between several adjacent frames 4 to maintain communication between the ballast water tank 1 and the guide groove 2; and at least one ballast water tank water outlet 5 is provided at the bottom of the guide groove 2.

[0010] Preferably, the transverse and longitudinal sections of the ballast water tank 1 are both rectangular, the frame 4 is arranged along the axial direction of the hull, the guide groove 2 is arranged in a direction perpendicular to the axial direction, and no frame or girder is arranged in the guide groove.

[0011] Preferably, the guide hole 4 also serves as an exhaust hole.

[0012] Preferably, the ballast water tank water outlet 5 is located near the midship.

[0013] Preferably, the bottom of the ballast water tank 1 is divided into several sections between adjacent frame members 4, and the diversion holes 4 are arranged at intervals at the position of each section.

[0014] Preferably, the four corners of the cross section of the guide groove are square corners.

[0015] Preferably, the four corners of the cross section of the guide groove are rounded.

[0016] Furthermore, an outwardly protruding frame is provided on the outer side of the bottom of the guide groove.

[0017] The beneficial effects of the present invention are:

[0018] 1) A guide groove is additionally provided outside the bottom of the ballast water tank. The length direction of the guide groove is perpendicular to the direction of the upwardly protruding frame of the tank bottom. The guide holes are opened between adjacent frame members so that the water in the ballast water tank can smoothly flow from the guide holes into the guide groove. The frame members will not block the water flow through the guide holes, thus eliminating the need to open water flow holes on the frame members, thereby avoiding blockage of the water flow holes.

[0019] 2) The size of the diversion holes can be much larger than the "water holes" in the existing technology, thus greatly improving the drainage effect and efficiency;

[0020] 3) When the ballast water tank is filled with water, the diversion trough actually serves as a part of the ballast water tank, but is located below the main part of the ballast water tank, so the drainage effect is significantly improved;

[0021] 4) The guide trough frame does not occupy the space inside the guide trough, which solves the problem of the frame occupying the flow volume in the cabin, increases the circulation area, increases the drainage flow rate, and thus increases the drainage efficiency.

[0022] 5) Greatly improve the efficiency of ballast water discharge, and cooperate with the rapid ballast system to improve ship operation efficiency and ship benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial detailed transverse section of the guide groove portion of the rapid ballast tank of the present invention.

[0024] Figure 2 This is a partial schematic diagram of the port side of the cross section of the ballast diversion trough in the rapid emptying ballast tank of the present invention, that is, Figure 1 A cross-sectional view in the direction of AA. In this figure, the outer plating represents the port side and CL represents the midship. Therefore, this figure is a simplified drawing and the part from the midship to the starboard side is omitted.

[0025] Figure 3 This is a partial schematic diagram of the bottom of the ballast water tank in the rapid emptying ballast tank of the present invention from a horizontal perspective, that is, Figure 1 In the figure, CL represents the midship and the outer plating represents the side.

[0026] In the attached figure, 1. ballast water tank, 2. diversion trough, 3. frame, 4. diversion hole, 5. ballast water outflow outlet. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figure 1-Figure 3 A rapid ballast tank emptying device includes a ballast water tank 1. A guide groove 2 is provided at the bottom of the ballast water tank 1 and located outside the ballast water tank 1. The direction of the guide groove 2 is perpendicular to the direction of the upwardly protruding frame 4 at the bottom of the ballast water tank; diversion holes 4 are provided at positions selected between several adjacent frames 4 to ensure that the ballast water tank 1 is connected to the guide groove 2; at least one ballast water tank water flow outlet 5 is provided at the bottom of the guide groove 2.

[0029] In this embodiment, see Figure 1-3 The transverse and longitudinal sections of the ballast water tank 1 are both rectangular, the frame 4 is arranged along the axial direction of the hull, the guide groove 2 is arranged in a direction perpendicular to the axial direction, and no frame or girder is arranged in the guide groove.

[0030] In this embodiment, the guide hole 4 also serves as an exhaust hole.

[0031] In this embodiment, the ballast water tank water outlet 5 is located near the midship.

[0032] In this embodiment, see Figure 2 The bottom of the ballast water tank 1 is divided into several sections between adjacent frame members 4, and the diversion holes 4 are arranged at intervals at the position of each section.

[0033] In this embodiment, the four corners of the cross section of the guide groove are square corners.

[0034] In another embodiment, the four corners of the cross section of the guide groove are rounded.

[0035] like Figure 1As shown, all ballast tanks have rectangular transverse and longitudinal cross-sections. The end transverse guide trough is arranged below the ballast tank, slightly inclined near the left edge, and the bottom of the rest of the tank is horizontal.

[0036] like Figure 2 As shown, no frame or girder is arranged in the guide groove 2 to ensure the water flow area. The guide hole 4 (also the exhaust hole) is arranged at the connection between the bottom of the ballast water tank and the guide groove 2. Figure 3 shown.

[0037] According to the structure of this embodiment, during drainage operations, ballast water is no longer discharged directly from the ballast tanks. Instead, it flows into the diversion trough 2 through the diversion holes 4. The diameter of the diversion holes 4 is much larger than the diameter of the original water flow holes, making it less susceptible to clogging and significantly increasing the drainage flow rate. The ribs of the diversion trough 2 do not occupy space within the trough, eliminating the problem of ribs occupying the flow volume within the tanks. This increases the flow area, improves the drainage flow rate, and thus enhances drainage efficiency.

[0038] The above are preferred embodiments of the present invention. Those skilled in the art may make various changes or improvements based on the above. Without departing from the overall concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A rapid ballast tank emptying system, characterized by: The invention comprises a ballast water tank (1), wherein a guide groove (2) is provided at the bottom of the ballast water tank (1) and outside the ballast water tank (1), and the direction of the guide groove (2) is perpendicular to the direction of the upwardly protruding frame (4) at the bottom of the ballast water tank; Selecting positions between a number of adjacent frame materials (4) to provide diversion holes (4) so ​​that the ballast water tank (1) and the diversion groove (2) are kept in communication; The bottom of the guide trough (2) is provided with at least one ballast water tank water outlet (5); The transverse and longitudinal cross-sections of the ballast water tank (1) are both rectangular, the frame (4) is arranged along the axial direction of the hull, the guide groove (2) is arranged in a direction perpendicular to the axial direction, and no frame or girder is arranged in the guide groove; The guide hole (4) also serves as an exhaust hole; The bottom of the ballast water tank (1) is divided into several sections between adjacent frame materials (4), and the diversion holes (4) are arranged at intervals at the positions of the sections; The outer side of the bottom of the guide groove is provided with an outwardly protruding frame.

2. The rapid ballast tank emptying system according to claim 1, wherein: The ballast water tank water outlet (5) is arranged at a position close to the middle of the ship.

3. The rapid ballast tank emptying system according to claim 1, wherein: The four corners of the guide groove cross section are square corners.

4. The rapid ballast tank emptying system according to claim 1, wherein: The four corners of the guide groove cross section are rounded.

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