Ship seawater valve box and ship

Abstract

The invention discloses a ship seawater valve box and a ship, the seawater valve box structure comprises a plurality of hierarchical areas which are arranged in the seawater valve box and between a grating and a seawater inlet short pipe, and each area is provided with a seawater through hole for communication. And the vent pipes are arranged in each layer area. Aiming at the design thought of the seawater valve box for reducing bubble gathering, the partition plate is arranged in the seawater valve box to standardize the flow direction of seawater, the path of bubbles entering the seawater valve box and reaching a seawater pump suction port is prolonged, and bubble gathering is reduced. The ventilation degree is increased by additionally arranging the ventilation pipes above the different partition plates, bubbles are discharged into the atmosphere as much as possible by increasing the number of the ventilation pipes or increasing the pipe diameters of the ventilation pipes, the operation defects of seawater cooling systems of ro-ro passenger ships and container ships are effectively overcome, stable operation of the ships is facilitated, and the safety coefficient is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a seawater valve box and a ship which are beneficial to ensuring the stable operation of a seawater cooling system of the ship. Background Art

[0002] The ship is equipped with a seawater valve box to enable the seawater cooling system to draw seawater to meet the operation of the ship's power system under different working conditions. The conventional high-level seawater valve box and low-level seawater valve box are set as follows Figure 1 to Figure 2 As shown, the grille is arranged on the outer plate of the hull, the seawater inlet short pipe is directly connected to the seawater valve box wall, and there is no shielding between the grille and the seawater inlet short pipe.

[0003] As the engine room space is compressed and new ship systems are configured, the conventional seawater valve box design will cause the seawater pump to transport seawater containing a large number of bubbles at the bottom of the ship to the pump group chamber when pumping seawater, resulting in a seawater pump pressure difference alarm and seawater pump cavitation. As a result, the seawater cooling system operates poorly and the heat exchange capacity is insufficient, causing the main engine, air conditioning compressor unit and other large heat exchange equipment to be used at reduced load or shut down, affecting the normal navigation and normal operation of the ship.

[0004] For a ro-ro passenger ship, when the ship is operating at full speed astern, since the low-level seawater valve box is located at the bottom of the hull between the double propellers, a large number of bubbles generated when the propellers are working are pushed and gathered from the stern along the bottom of the ship to the bow. More bubbles pass through the grille to the low-level seawater valve box, and there is no obstruction between the grille and the seabed door, and there is only one air vent on the top of the seawater valve box. The bubbles cannot be completely discharged through the air vent, so that there are still a large number of bubbles in the seawater of the low-level seawater valve box. When the seawater pump sucks the seawater in the seawater valve box, air suction occurs, thereby triggering the seawater pump pressure difference alarm.

[0005] For container ships, in order to better meet the requirements of ship energy efficiency, in recent years, air lubrication systems have been installed at the bottom of the ship. Therefore, when the ship is running, a large number of bubbles generated by the bottom auxiliary system are also introduced into the seawater valve box.

[0006] From the above analysis of the sources of bubbles on ships, it can be seen that the generation of bubbles is inevitable, and how to avoid bubbles entering the seawater pump unit is an important issue that needs to be considered. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a ship seawater valve box and a ship, which solves the problem of a large number of bubbles entering the seawater inlet during the operation of the ship and causing the shutdown of the ship's cooling system equipment by reasonably designing the internal structure of the seawater valve box.

[0008] The object of the present invention is achieved through the following technical solutions: a ship seawater valve box, comprising:

[0009] Multiple hierarchical areas are arranged inside the seawater valve box, between the grid and the seawater inlet short pipe, and each area is provided with a seawater through hole for communication.

[0010] Ventilation tubes are provided in each level area.

[0011] Preferably, at least one ventilation tube is provided in each level area.

[0012] Preferably, air holes and quicksand holes are provided on both sides of the grille.

[0013] Preferably, the hierarchical areas of the seawater valve box are divided by partitions, and seawater through holes are opened on the partitions.

[0014] Preferably, the seawater valve box is divided into three areas by at least two partitions.

[0015] Preferably, the seawater through holes of the two partitions are respectively arranged at the upper and lower parts.

[0016] Preferably, the hierarchical areas are divided by bulkheads, closed hull plates and intermediate through-hole platforms, wherein:

[0017] The middle through hole platform is arranged on one side of the seawater valve box, and a plurality of partitions are arranged inside to divide the middle through hole platform area into a plurality of hierarchical areas.

[0018] The closed hull plate is arranged above the grille to close and divide the area between the grille and the seawater inlet short pipe. The closed hull plate is provided with side wall through holes which are connected with the middle through hole platform.

[0019] The air permeable pipe is at least arranged on the middle through hole platform.

[0020] The intermediate through-hole platform divides the enclosed area between the enclosed hull plate and the grille by a bulkhead.

[0021] Preferably, the baffle plate disposed inside the middle through hole platform is provided with seawater through holes both above and below it.

[0022] In addition to providing a ship seawater valve chest, the present invention further provides a ship provided with the seawater valve chest.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The present invention provides a ship seawater valve box and a ship, aiming at the design idea of ​​a seawater valve box for reducing bubble aggregation, by setting a baffle in the seawater valve box to regulate the flow direction of seawater, extending the path of bubbles entering the seawater valve box to reach the seawater pump suction port, and reducing bubble aggregation. By adding ventilation pipes above different baffles to increase the ventilation strength, and increasing the number of ventilation pipes or increasing the diameter of the ventilation pipes to discharge as many bubbles as possible into the atmosphere, the operating drawbacks of the seawater cooling system of passenger and vehicle ships and container ships are effectively improved, which is conducive to the stable operation of ships and increases the safety factor.

[0025] The present invention is applied to the design of seawater valve boxes of ro-ro passenger ships and container ships, which can effectively avoid the load reduction or shutdown of large heat exchange equipment such as the main engine and air-conditioning compressor unit during the sea trial, ensure the normal navigation and normal operation of the ship, and ensure the stable operation of the ship's seawater cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a high-level seawater valve box in the prior art;

[0027] Figure 2 It is a schematic diagram of the structure of a low-level seawater valve box in the prior art;

[0028] Figure 3 This is a schematic diagram of the structure of a high-level seawater valve box in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of a low-level seawater valve box in an embodiment of the present invention;

[0030] Figure 5 for Figure 4 AA direction schematic diagram;

[0031] Figure 6 for Figure 4 BB direction schematic diagram.

[0032] In the figure, 1 is a seawater valve box; 2 is a grille; 3 is a short seawater inlet pipe; 4 is a seawater through hole; 5 is a vent pipe; 6 is a vent hole; 7 is a quicksand hole; 8 is a partition; 9 is a closed hull plate; 10 is a middle through hole platform; 11 is a side wall through hole; 12 is a closed hull plate area above the grille. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] The technical solution of the present invention provides a ship seawater valve box, comprising:

[0035] Multiple hierarchical areas are arranged inside the seawater valve box 1, between the grid 2 and the seawater inlet short pipe 3, and each area is provided with a seawater through hole 4 for communication;

[0036] The ventilation tube 5 is arranged in each level area.

[0037] In one embodiment of the present invention, at least one ventilation tube 5 is provided in each level area.

[0038] In one embodiment of the present invention, air holes 6 and quicksand holes 7 are provided on both sides of the grille 2 .

[0039] like Figure 3 As shown, in one embodiment of the present invention, the hierarchical areas of the seawater valve box 2 are divided by partitions 8, and the partitions 8 are provided with seawater through holes 4. As a further optimization of the above embodiment, the seawater valve box 2 is divided into three areas by at least two partitions 8. The above embodiment is applicable to the high-level seawater valve box structure, specifically, Figure 3 As shown, the high-level seawater valve box structure is provided with two baffles 8 between the grid 2 and the seawater inlet, a seawater through hole 4 is provided above the first baffle 8, and a seawater through hole 4 is provided below the second baffle 8. By providing the baffle 8, the flow path of the seawater is planned, so that when the seawater with bubbles passes through the first baffle 8, a part of the bubbles are in the first layer ( Figure 3 After passing through the first baffle 8, the seawater flows from high to low, and the bubbles in the seawater will also escape during the falling process, passing through the second layer ( Figure 3 The air is discharged from the air pipe 5 of the area shown in B in the figure. There are more bubbles escaping from this area, so two air pipes 5 can be set in the second level. After the seawater flows through the seawater through hole 4 of the second baffle 8, it slowly rises to the third level ( Figure 3 The air inlet of the seawater enters the short seawater inlet pipe 3, where an exhaust pipe 5 is also arranged on the top of the seawater valve box 1 to ensure the escape of the remaining bubbles. At the same time, the length of the short seawater inlet pipe 3 immersed in the seawater valve box structure is increased to further reduce the influx of bubbles into the short seawater inlet pipe 3.

[0040] like Figures 4 to 6As shown, in another embodiment of the present invention, the hierarchical areas of the seawater valve box 1 are divided by partitions 8, closed hull plates 9 and intermediate through-hole platforms 10, wherein: the intermediate through-hole platform 10 is arranged on one side of the seawater valve box 2, and is provided with a plurality of partitions 8 inside, dividing the intermediate through-hole platform 10 area into a plurality of hierarchical areas; the closed hull plate 9 is arranged above the grille 2, and the area between the grille 2 and the seawater inlet short pipe 3 is closed and divided, and the closed hull plate 9 is provided with side wall through holes 11, which are connected to the intermediate through-hole platform 10; the air vent 5 is at least arranged on the intermediate through-hole platform 10; the intermediate through-hole platform 10 separates the closed area between the closed hull plate 9 and the grille 2 through the partition 8. The partition 8 arranged inside the intermediate through-hole platform 10 is provided with seawater through holes 4 both above and below it. The above-mentioned embodiment is applicable to a low-position seawater valve box structure, specifically, as Figure 4 As shown, the low-position seawater valve box structure is provided with a closed hull plate 9 above the grid 2, and only the side wall through holes 11 are retained, so as to ensure that the water entering the grid 2 does not directly flow to the seawater inlet short pipe 3. Figure 5 The closed hull plate area 12 above the grid and the reserved middle through-hole platform 10 are provided, and three partitions 8 are arranged in the middle through-hole platform 10. The middle through-hole platform 10 and the closed hull plate area 12 above the grid are separated by a second partition 8 (such as Figure 6 As shown) separated. Figure 6 As shown, after passing through the grille 2, the seawater flows through the seawater through holes 4 at the lower ends of the first baffle 8 and the second baffle 8 according to the set path, through the middle through hole platform 10 and enters the first level of bubble isolation ( Figure 6 After passing through the first baffle 8 and the upper end or through hole 8 of the second baffle 8, some bubbles escape through the first-level vent pipe 5. After passing through the first level, the seawater enters the second level ( Figure 6 The seawater flows into the third layer (shown in the area B) and flows to the seawater through hole 4 at the lower end of the third baffle 8. During the seawater flowing down, a large number of bubbles in the seawater will escape. Two vent pipes 5 in different directions are set in this area. Figure 6 After the seawater is discharged, the seawater slowly rises from the seawater through hole 4 at the lower end of the third baffle 8 to the seawater inlet short pipe 3, where an exhaust pipe 5 is also arranged on the top of the seawater valve box to ensure the escape of the remaining bubbles. At the same time, increasing the length of the seawater inlet short pipe 3 immersed in the seawater valve box structure helps to reduce the influx of bubbles into the seawater inlet short pipe 3.

[0041] In addition to providing a ship seawater valve chest, the technical solution of the present invention further provides a ship provided with the seawater valve chest.

[0042] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A ship seawater valve box, characterized in that: The seawater valve box comprises: A plurality of hierarchical areas are arranged inside the seawater valve box (1), between the grid (2) and the seawater inlet short pipe (3), and each area is provided with a seawater through hole (4) for communication; A ventilation pipe (5) is arranged in each level area.

2. A ship seawater valve chest according to claim 1, characterized in that: At least one ventilation pipe (5) is arranged in each level area.

3. A ship seawater valve chest according to claim 1, characterized in that: Air holes (6) and quicksand holes (7) are provided on both sides of the grille (2).

4. A ship seawater valve chest according to claim 1, characterized in that: The hierarchical areas of the seawater valve box (2) are divided by partitions (8), and the partitions (8) are provided with seawater through holes (4).

5. A ship seawater valve chest as claimed in claim 4, characterized in that: The seawater valve box (2) is divided into three areas by using at least two partitions (8).

6. A ship seawater valve chest according to claim 5, characterized in that: The seawater through holes (4) of the two partitions (8) are respectively arranged at the upper and lower parts.

7. A ship seawater valve chest according to claim 1, characterized in that: The hierarchical area is divided by bulkheads (8), closed hull plates (9) and intermediate through-hole platforms (10), wherein: The intermediate through-hole platform (10) is arranged on one side of the seawater valve box (2), and a plurality of partitions (8) are arranged inside to divide the area of ​​the intermediate through-hole platform (10) into a plurality of hierarchical areas; The closed hull plate (9) is arranged above the grille (2) to seal and divide the area between the grille (2) and the seawater inlet short pipe (3); the closed hull plate (9) is provided with a side wall through hole (11) which is in communication with the middle through hole platform (10); The air permeable tube (5) is at least arranged on the middle through hole platform (10); The intermediate through-hole platform (10) separates the closed area between the closed hull plate (9) and the grid (2) through the partition plate (8).

8. A ship seawater valve chest according to claim 7, characterized in that: The baffle (8) disposed inside the intermediate through-hole platform (10) is provided with the seawater through-holes (4) both above and below it.

9. A ship, characterized in that: The ship is provided with a seawater valve chest as described in any one of claims 1-8.

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