Rapid ballast water discharge device and mounting method

Abstract

The invention provides a quick ballast water discharge device and a mounting method, and relates to the technical field of ship construction. The rapid ballast water discharging device comprises an oval cover plate, an in-cabin connecting bent pipe and a ballast water discharging hose, the oval cover plate is fixed to a manhole in the side wall of a ship, a connecting round pipe is welded to a water discharging hole in the bottom of the oval cover plate, the head end of the connecting round pipe is in flange connection with the in-cabin connecting bent pipe arranged in a cargo cabin, and the ballast water discharging hose is connected with the outer side wall of the ship. The tail end of the ballast water discharging pipe is connected with a ballast water discharging hose flange arranged outside the cargo hold, and a manual control valve is arranged on the ballast water discharging hose and used for controlling ballast water discharging. The invention further provides a mounting method of the quick ballast water discharge device, gravity drainage and a siphon principle are combined, the quick ballast water discharge device is used for realizing quick discharge of ballast water in a cabin, the working intensity of constructors is reduced, a split structure is adopted, modular combined mounting and lightweight material selection are matched, and the mounting efficiency is improved. And the device can be repeatedly used in stowage water discharge operation.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a ballast water rapid discharge device and an installation method thereof. Background Art

[0002] In order to maximize the use of dock resources, ships are usually built in a whole-half ship construction method during the dock construction stage. When the whole ship is completed and ready to be launched, the half ship will be built in the same dock and will float first and then land on the pier. Usually, in order to ensure that the half ship's attitude and draft meet the requirements during the process of floating first and then landing on the pier, it is necessary to add ballast water to the completed large cabin for loading. After the half ship lands on the pier, the ballast water in the large cabin needs to be discharged before the subsequent construction of the whole ship can be carried out.

[0003] At present, cargo hold stowage water discharge is usually achieved in two ways. One is to use an electric submersible pump to discharge by external suction; the other is to open a temporary process hole on the outer plate corresponding to the cargo hold, connect the temporary process hole to the inner bottom plate opening or door hole through a round pipe, and connect a control valve to the round pipe for discharge.

[0004] However, the current method of discharging cargo hold water has some problems:

[0005] When an electric submersible pump is used for external suction discharge, the electric submersible pump and its supporting kinetic energy equipment need to be hoisted and installed. The construction process is cumbersome and requires construction personnel to supervise the operation. Secondly, there is a certain distance between the suction port of the submersible pump equipment and the bottom motor, which makes it impossible to completely discharge the load. It is necessary to replace it with a low-power fire hose for discharge, and the discharge efficiency is low. Thirdly, electric submersible pumps are prone to equipment failure when working for a long time, and maintenance in the middle is time-consuming and labor-intensive, affecting the production and construction progress. In addition, the procurement cost of submersible pumps is high, and purchasing submersible pumps as spares requires additional funds, which increases the cost of ships. In addition, electric submersible pumps and connecting combined pipe accessories are usually large in size and occupy certain site resources when stored.

[0006] Although the method of opening a temporary process hole on the outer plate to connect the discharge pipe to control the discharge solves some of the problems of using an electric submersible pump for discharge, it requires additional hole opening operations on the inner bottom and outer bottom plates of the ship, and welding construction is required during installation and gas cutting operations are required during removal, and the construction process is relatively cumbersome; in addition, the removal not only damages the ship's paint, but also easily damages the hull structure and the sealing plate of the discharge device, making it difficult to reuse the discharge device; and, for some ultra-large ships, the inner bottom height is usually not less than 4m, and the discharge pipe connecting the inner bottom opening and the outer bottom plate opening and the control switch device are long and heavy, making installation and operation difficult.

[0007] Therefore, there is an urgent need to propose a ballast water rapid discharge device and an installation method to achieve rapid discharge of the ballast water when half of the ship is discharged. Summary of the invention

[0008] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a ballast water rapid discharge device and installation method, which combines gravity drainage with the siphon principle and realizes rapid discharge of ballast water by controlling a manual control valve. The discharge operation is simple and efficient, while avoiding the problem of traditional submersible pump discharge operations requiring lifting and coordination, reducing energy consumption during the discharge process, and being more environmentally friendly.

[0009] To achieve the above object, the present invention adopts the following technical solution:

[0010] A ballast water rapid discharge device comprises an elliptical cover plate, an in-cabin connecting elbow and a ballast water discharge hose, wherein the in-cabin connecting elbow and the ballast water discharge hose are respectively arranged on both sides of the elliptical cover plate, the elliptical cover plate is respectively connected to the in-cabin connecting elbow and the ballast water discharge hose through connecting circular pipes, and a manual control valve is arranged on the ballast water discharge hose.

[0011] Preferably, the oval cover is fixed to the manhole on the cargo hold wall;

[0012] The outer side wall of the oval cover plate is provided with a plurality of bolt holes and a drainage hole;

[0013] The plurality of bolt holes are evenly arranged along the circumference of the elliptical cover plate and match the studs of the manhole door seat ring;

[0014] The drainage hole is located at the center of the bottom of the outer side wall of the elliptical cover plate. The head end of the connecting round pipe passes through the drainage hole and extends into the manhole. The connecting round pipe and the elliptical cover plate are welded and fixed to form a whole.

[0015] Preferably, two pairs of U-shaped tooling handles are provided on the top of the side wall of the elliptical cover plate, and the same pair of U-shaped tooling handles are symmetrically arranged on both sides of the elliptical cover plate.

[0016] Preferably, the connecting circular tube is configured as a steel tube, and flanges are provided at both ends of the connecting circular tube. The head end of the connecting circular tube is connected to the connecting elbow in the cabin, and the tail end is connected to the ballast water discharge hose.

[0017] Preferably, the in-cabin connecting elbow is placed inside the cargo hold, the head end of the in-cabin connecting elbow is placed at the bottom of the cargo hold, and the tail end is connected to the head end flange of the connecting circular pipe;

[0018] The ballast water discharge hose is placed outside the cargo hold and is made of rubber material. The head end of the ballast water discharge hose is connected to the tail end flange of the connecting round pipe;

[0019] The manual control valve is arranged at the head end of the ballast water discharge hose and is connected to the ballast water discharge hose flange.

[0020] Preferably, the in-cabin connecting elbow and the flange arranged at the tail end of the in-cabin connecting elbow are both made of PE material, and the bending radius of the in-cabin connecting elbow is 90°.

[0021] Preferably, the manually controlled valve is a manual butterfly valve.

[0022] Preferably, the length of the ballast water discharge hose is not less than the distance between the side wall of the hull cargo hold and the segmented opening, and the end height of the tail end of the ballast water discharge hose is lower than the end height of the head end of the connecting elbow in the cabin.

[0023] A method for rapid ballast water discharge, using the rapid ballast water discharge device as described above, comprises the following steps:

[0024] Step 1: Before half of the ship is loaded with ballast water, a sealing gasket is installed at the manhole door seat ring of the cargo hold side wall of the hull, and after the bolt holes on the elliptical cover plate are aligned with the studs of the manhole door seat ring, the elliptical cover plate is fixed with the nuts provided in conjunction with the studs of the manhole door seat ring to fix the manhole;

[0025] Step 2: Install the in-cabin connecting elbow in the cargo hold, place the head end of the in-cabin connecting elbow at the bottom of the cargo hold, the distance between the head end of the in-cabin connecting elbow and the bottom of the cargo hold shall not be less than 1 / 4 of the diameter of the in-cabin connecting elbow, a flange sealing gasket is provided between the tail end flange of the in-cabin connecting elbow and the head end flange of the connecting round pipe, and the in-cabin connecting elbow and the connecting round pipe are fixed with bolt and nut assemblies;

[0026] Step 3, install the manual control valve and the ballast water discharge hose in sequence, the end height of the ballast water discharge hose tail end is lower than the end height of the head end of the connecting elbow in the cabin, connect the ballast water discharge hose to the tail end of the connecting round pipe, and flange sealing gaskets are provided at the flange connection between the head end of the ballast water discharge hose and the tail end of the connecting round pipe, and at the flange connection between the manual control valve and the ballast water discharge hose. Use bolt and nut assemblies to fix the manual control valve to the ballast water discharge hose;

[0027] Step 4: Close the manual control valve, check and confirm that the connection between the oval cover plate connecting round pipe, the cabin connecting elbow, and the ballast water discharge hose is intact, and then add ballast water to the cargo hold of the inner hull before the half-ship floats to the preset water level;

[0028] Step 5, releasing water from the dock, completing the floating of the whole ship and half of the ship, undocking the whole ship, closing the dock door, draining the dock, and landing the half ship on the pier. After the half ship is landed on the pier, open the manual control valve to realize the gravity drainage of the ballast water in the hull cargo hold, and use the siphon principle to discharge the ballast water out of the hull cargo hold;

[0029] Step 6: After the unloading is completed, the elliptical cover, the connecting elbow in the cabin and the ballast water discharge hose are removed in turn and properly stored to facilitate the reuse of the ballast water rapid unloading device.

[0030] Beneficial technical effects brought by the present invention:

[0031] The present invention proposes a ballast water rapid discharge device and method. By installing the ballast water rapid discharge device at the manhole of the cargo hold side wall, based on the siphon principle, the ballast water in the cabin can be quickly discharged to the outside of the hull only by utilizing gravity drainage, thereby saving discharge time, improving discharge efficiency, and realizing rapid ballast water discharge.

[0032] The ballast water rapid discharge device proposed in the present invention adopts a bolt-tightening method to fix the elliptical cover plate of the ballast water rapid discharge device on the original ship's manhole door seat ring, without the need for additional hole drilling and welding operations. The installation method is simple, and the installation process is different from the traditional electric submersible pump, which requires the use of a crane to cooperate in the operation, saving energy consumption and human resource investment. At the same time, it avoids welding and cutting operations, and is more green, environmentally friendly, energy-saving and efficient.

[0033] The ballast water rapid discharge device proposed in the present invention adopts a split structural design and modular combination installation method, which is more convenient for on-site installation and disassembly, and can be reused in the semi-ship floating stowage water discharge operation of the same type of project. At the same time, the ballast water rapid discharge device proposed in the present invention also uses the cabin connecting elbow made of PE material to achieve the overall lightweight of the device. In addition, the ballast water rapid discharge device proposed in the present invention is of reliable quality and long service life, avoiding construction delays caused by device failures, and each structure is easy to replace, effectively ensuring the on-time progress of the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the ballast water rapid discharge device of the present invention.

[0035] Figure 2 It is the front view of the oval cover.

[0036] Figure 3 A side view of an oval cover.

[0037] Figure 4 It is a schematic diagram of connecting the convex flat-welded steel flange at the end of a round pipe.

[0038] Figure 5 This is a schematic diagram of the connecting elbows in the cabin.

[0039] Figure 6 Schematic diagram of a manually controlled valve.

[0040] In the figure: 1. oval cover plate, 2. connecting round pipe, 3. convex flat-welded steel flange, 4. U-shaped tooling handle, 5. connecting elbow in the cabin, 6. manual control valve, 7. ballast water discharge hose, 8. sealing gasket, 9. nut, 10. flange sealing gasket, 11. bolt and nut assembly, 12. segmented mouth guardrail. DETAILED DESCRIPTION

[0041] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0044] In the present invention, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meaning of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0046] This embodiment discloses a ballast water rapid discharge device, such as Figure 1 As shown, it includes an elliptical cover plate 1, an in-cabin connecting elbow 5 and a ballast water discharge hose 7, which are respectively arranged on both sides of the elliptical cover plate 1. The elliptical cover plate 1 is connected to the in-cabin connecting elbow 5 and the ballast water discharge hose 7 through a connecting circular tube 2 fixed thereon, and a manual control valve is arranged on the ballast water discharge hose.

[0047] The oval cover plate 1 is fixed to the manhole of the cargo hold wall and is compatible with the manhole door. Figure 2 and Figure 3 As shown. The outer wall of the oval cover is provided with a plurality of bolt holes and a drain hole, which are evenly distributed along the circumference of the oval cover and are used to match the studs of the manhole door seat ring to fix the oval cover to the manhole door; the drain hole is located at the center of the bottom of the outer wall of the oval cover, and the head end of the connecting round pipe 2 passes through the drain hole and extends into the manhole, and is welded and fixed with the oval cover 1 to form a whole.

[0048] In order to facilitate installation, two pairs of U-shaped tooling handles 4 are arranged on the top of the side wall of the oval cover plate, and the same pair of U-shaped tooling handles 4 are symmetrically arranged on both sides of the oval cover plate.

[0049] In this embodiment, the connecting round tube 2 is a steel tube with a certain strength, and convex flat-welded steel flanges 3 are provided at both ends of the connecting round tube 2. Figure 4 As shown, the head end of the connecting circular pipe 2 is connected to the connecting elbow 5 in the cabin, and the tail end is connected to the ballast water discharge hose 7.

[0050] The in-cabin connecting elbow 5 is placed inside the cargo hold. Figure 5 As shown, the head end of the in-cabin connecting elbow 5 is placed at the bottom of the cargo hold, and the tail end is connected to the head end flange of the connecting circular pipe 2. The bending radius of the in-cabin connecting elbow is 90°. At the same time, in order to reduce the overall weight of the ballast water rapid discharge device and facilitate the installation and operation of the ballast water rapid discharge device, the in-cabin connecting elbow and the flange matched at the tail end of the in-cabin connecting elbow are made of PE material and should meet the nominal pressure of not less than 2.5Mpa.

[0051] The ballast water discharge hose 7 is placed outside the cargo hold and is made of rubber material. The head end of the ballast water discharge hose 7 is connected to the tail end flange of the connecting round pipe 2. The manual control valve 6 is as shown in FIG. Figure 6 As shown, it is arranged at the head end of the ballast water discharge hose and is connected to the ballast water discharge hose flange. In this embodiment, the manual control valve 6 is arranged as a manual butterfly valve, which is used to control the switch of the ballast water rapid discharge device.

[0052] In order to ensure the ballast water discharge efficiency and discharge the ballast water level to the minimum by utilizing the siphon principle, it is necessary to ensure that the height of the end of the ballast water discharge hose is lower than the height of the end of the head of the connecting elbow in the cabin, the distance between the head of the connecting elbow in the cabin and the bottom of the cargo hold is not less than 1 / 4 of the diameter of the connecting elbow in the cabin, and the length of the ballast water discharge hose is not less than the distance between the side wall of the hull cargo hold and the section port, and the tail end of the ballast water discharge hose is passed through the bottom of the section port guardrail 12, so as to facilitate the ballast water discharge only by gravity drainage and the siphon principle.

[0053] This embodiment also proposes a method for rapid ballast water discharge, using the rapid ballast water discharge device as described above, comprising the following steps:

[0054] Step 1, before half of the ship is loaded with ballast water, a sealing gasket 8 made of nitrile rubber is installed at the manhole door seat ring of the cargo hold side wall of the hull for sealing, and then the bolt holes on the elliptical cover plate are aligned with the manhole door seat ring studs, and the manhole door seat ring studs are respectively inserted into the corresponding bolt holes, and then an electric wrench is used to tighten the nuts 9 provided with the manhole door seat ring studs to fix the elliptical cover plate to the manhole.

[0055] Step 2, install the in-cabin connecting elbow in the loading cargo hold, place the head end of the in-cabin connecting elbow at the bottom of the cargo hold, the distance between the head end of the in-cabin connecting elbow and the bottom of the cargo hold is not less than 1 / 4 of the diameter of the in-cabin connecting elbow, and set a flange sealing gasket 10 between the tail end flange of the in-cabin connecting elbow and the head end flange of the connecting circular pipe for sealing, and after sealing, use the bolt and nut assembly 11 to fix the in-cabin connecting elbow and the connecting circular pipe.

[0056] Step 3, install the manual control valve and the ballast water discharge hose in sequence. In order to utilize the siphon principle to discharge the ballast water level to the lowest level and ensure that the end height of the tail end of the ballast water discharge hose is lower than the end height of the head end of the connecting elbow in the cabin, connect the ballast water discharge hose to the tail end of the connecting circular pipe. Flange sealing gaskets 10 are provided at the flange connection between the head end of the ballast water discharge hose and the tail end of the connecting circular pipe, and at the flange connection between the manual control valve and the ballast water discharge hose. After sealing with the flange sealing gasket 10, the bolt and nut assembly 11 is used to fix the manual control valve and the ballast water discharge hose, and the tail end of the ballast water discharge hose is passed through the bottom of the segmented guardrail 12.

[0057] Step 4, close the manual control valve, check the connection status between the connecting round pipe of the elliptical cover, the connecting elbow in the cabin, and the ballast water discharge hose, and after confirming that the seals of all components in the ballast water rapid discharge device are intact, add ballast water to the inner hull cargo hold before the half-ship floats to the preset water level.

[0058] Step 5, releasing water from the dock, completing the floating of the whole ship and half of the ship, undocking the whole ship, closing the dock door, draining the dock, and landing half of the ship on the pier. After half of the ship has landed on the pier, open the manual control valve to realize the gravity drainage of the ballast water in the hull cargo hold, and use the siphon principle to discharge the ballast water out of the hull cargo hold.

[0059] Step 6: After the discharge is completed, the elliptical cover, the connecting elbow in the cabin and the ballast water discharge hose are removed in turn and properly stored to facilitate the reuse of the ballast water rapid discharge device in subsequent projects.

[0060] It can be seen that the present invention achieves rapid ballast water discharge by installing the ballast water rapid discharge device at the manhole of the cargo hold side wall and based on the siphon principle, the ballast water in the cabin can be quickly discharged to the outside of the hull only by gravity drainage, thereby realizing rapid ballast water discharge. Compared with the traditional electric submersible pump device, the ballast water rapid discharge device and method proposed in the present invention do not require the use of lifting equipment, and are safer and more environmentally friendly. At the same time, the ballast water rapid discharge device in the present invention adopts a split structure, which is easy to install and disassemble, and is beneficial to the transportation, storage and reuse of the device, thereby improving the applicability and convenience of the ballast water rapid discharge device.

[0061] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the protection scope of the present invention.

Claims

1. A ballast water rapid discharge device, characterized in that: It includes an elliptical cover plate, an in-cabin connecting elbow and a ballast water discharge hose, which are respectively arranged on both sides of the elliptical cover plate. The elliptical cover plate is connected to the in-cabin connecting elbow and the ballast water discharge hose through connecting circular pipes, and a manual control valve is arranged on the ballast water discharge hose.

2. The ballast water rapid discharge device according to claim 1, characterized in that: The oval cover plate is fixed to the manhole on the cargo hold wall; The outer side wall of the oval cover plate is provided with a plurality of bolt holes and a drainage hole; The plurality of bolt holes are evenly arranged along the circumference of the elliptical cover plate and match the studs of the manhole door seat ring; The drainage hole is located at the center of the bottom of the outer side wall of the elliptical cover plate. The head end of the connecting round pipe passes through the drainage hole and extends into the manhole. The connecting round pipe and the elliptical cover plate are welded and fixed to form a whole.

3. The ballast water rapid discharge device according to claim 1, characterized in that: Two pairs of U-shaped tooling handles are arranged on the top of the side wall of the oval cover plate, and the same pair of U-shaped tooling handles are symmetrically arranged on both sides of the oval cover plate.

4. The ballast water rapid discharge device according to claim 1, characterized in that: The connecting circular pipe is configured as a steel pipe, and flanges are provided at both ends of the connecting circular pipe. The head end of the connecting circular pipe is connected to the connecting elbow in the cabin, and the tail end is connected to the ballast water discharge hose.

5. The ballast water rapid discharge device according to claim 1, characterized in that: The in-cabin connecting elbow is placed inside the cargo hold, the head end of the in-cabin connecting elbow is placed at the bottom of the cargo hold, and the tail end is connected to the head end flange of the connecting circular pipe; The ballast water discharge hose is placed outside the cargo hold and is made of rubber material. The head end of the ballast water discharge hose is connected to the tail end flange of the connecting round pipe; The manual control valve is arranged at the head end of the ballast water discharge hose and is connected to the ballast water discharge hose flange.

6. The ballast water rapid discharge device according to claim 5, characterized in that: The in-cabin connecting elbow and the flange arranged at the tail end of the in-cabin connecting elbow are both made of PE material, and the bending radius of the in-cabin connecting elbow is 90°.

7. The ballast water rapid discharge device according to claim 5, characterized in that: The manual control valve is a manual butterfly valve.

8. The ballast water rapid discharge device according to claim 1, characterized in that: The length of the ballast water discharge hose is not less than the distance between the side wall of the hull cargo hold and the segmented opening, and the end height of the tail end of the ballast water discharge hose is lower than the end height of the head end of the connecting elbow in the cabin.

9. A method for rapid ballast water discharge, characterized in that: The ballast water rapid discharge device according to any one of claims 1 to 8 comprises the following steps: Step 1: Before half of the ship is loaded with ballast water, a sealing gasket is installed at the manhole door seat ring of the cargo hold side wall of the hull, and after the bolt holes on the elliptical cover plate are aligned with the studs of the manhole door seat ring, the elliptical cover plate is fixed with the nuts provided in conjunction with the studs of the manhole door seat ring to fix the manhole; Step 2: Install the in-cabin connecting elbow in the cargo hold, place the head end of the in-cabin connecting elbow at the bottom of the cargo hold, the distance between the head end of the in-cabin connecting elbow and the bottom of the cargo hold shall not be less than 1 / 4 of the diameter of the in-cabin connecting elbow, a flange sealing gasket is provided between the tail end flange of the in-cabin connecting elbow and the head end flange of the connecting round pipe, and the in-cabin connecting elbow and the connecting round pipe are fixed with bolt and nut assemblies; Step 3, install the manual control valve and the ballast water discharge hose in sequence, the end height of the ballast water discharge hose tail end is lower than the end height of the head end of the connecting elbow in the cabin, connect the ballast water discharge hose to the tail end of the connecting round pipe, and flange sealing gaskets are provided at the flange connection between the head end of the ballast water discharge hose and the tail end of the connecting round pipe, and at the flange connection between the manual control valve and the ballast water discharge hose. Use bolt and nut assemblies to fix the manual control valve to the ballast water discharge hose; Step 4: Close the manual control valve, check and confirm that the connection between the oval cover plate connecting round pipe, the cabin connecting elbow, and the ballast water discharge hose is intact, and then add ballast water to the cargo hold of the inner hull before the half-ship floats to the preset water level; Step 5, releasing water from the dock, completing the floating of the whole ship and half of the ship, undocking the whole ship, closing the dock door, draining the dock, and landing the half ship on the pier. After the half ship is landed on the pier, open the manual control valve to realize the gravity drainage of the ballast water in the hull cargo hold, and use the siphon principle to discharge the ballast water out of the hull cargo hold; Step 6: After the unloading is completed, the elliptical cover, the connecting elbow in the cabin and the ballast water discharge hose are removed in turn and properly stored to facilitate the reuse of the ballast water rapid unloading device.

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