Dock gate and dock gate cooling water supply system

Abstract

The present application relates to a dock-in cooling water supply system using a dock gate, wherein a dock gate through pipe valve is arranged in the dock gate, one end of the dock gate through pipe valve is a water inlet end, the water inlet end is communicated with water area outside the dock gate, the other end is a water outlet end, the water outlet end is connected with a ship water tank through a conveying pipe, a hose and a sea water tank adapter pipe in sequence; the dock gate through pipe valve is connected with the conveying pipe through a dock gate interface seat plate and a dock gate adapter pipe; the dock gate adapter pipe comprises a horn-shaped pipe, both ends of the horn-shaped pipe are respectively provided with a large end interface flange and a small end interface flange; the cooling water supply system further comprises a plurality of supports, the supports are arranged below the dock gate interface seat plate to the sea water tank adapter pipe and play a supporting role. In the implementation, the present application provides a water supply system, that is, one or more interface seat plates are added by using the through pipe valve, and corresponding pipelines and accessories are built in the dock, so that the dock gate structure with a single function has the function of supplying water to the ship debugging, sea water outside the dock can be introduced into the dock, and the unpowered, low-cost and rapid supply of the dock-in ship equipment debugging cooling water is realized.

Description

Technical Field

[0001] This invention relates to the technical field of shipbuilding technology, specifically to a dock cooling water supply system utilizing a dock gate and its usage method, and more particularly to a system for supplying cooling water to equipment of a ship under construction in the dock using a dock gate and its usage method. Background Technology

[0002] In existing technologies, shipbuilding typically involves an equipment commissioning phase. Equipment requiring cooling, such as generator sets, needs a stable and continuous external water supply during commissioning to support the cooling water system. Therefore, equipment commissioning is generally conducted after the ship is launched. This allows the ship to directly draw seawater (or river water) from its side tanks for cooling while at dock. Figure 1 As shown.

[0003] With the improvement of shipbuilding efficiency and the application of advanced construction methods, there is an urgent need to conduct equipment commissioning before a ship is launched (inside the dock). Using land-based tap water is neither economical nor sufficient to meet flow requirements. Currently, the practice of using water pumps to draw seawater (or river water) from outside the dock and pipes it into the ship's cooling system is employed. Figure 2 As shown. This method requires water pumps and a power supply, as well as pipelines to cross the dock gate. The system is complex, cumbersome to set up, and has low construction efficiency.

[0004] When a ship is raised or lowered in the dock, or when it enters the dock from outside, water must first be pumped into the dock. However, the water flow rate is usually much greater than the cooling water flow rate required for the aforementioned equipment commissioning, which can cause unnecessary impact on the cooling system and damage the equipment.

[0005] Therefore, there is an urgent need in the market for a dock cooling water supply system that utilizes dock gates, which can precisely control the water injection volume, ensure cooling effect, and is easy to install and disassemble. Summary of the Invention

[0006] The purpose of this invention is to provide a dock cooling water supply system utilizing a dock gate and its usage method. Through structural improvements, it provides a cooling water guarantee for equipment commissioning within the dock, which helps to shorten the shipbuilding cycle. At the same time, it is convenient to install and dismantle, environmentally friendly and energy-saving, and has a low cost.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a dock cooling water supply system utilizing a dock gate, comprising a dock gate, characterized in that: a dock gate straight-through valve is provided inside the dock gate, one end of the dock gate straight-through valve is a water inlet end, which is connected to the water area outside the dock gate, and the other end is a water outlet end, which is connected to the ship's seawater tank after being connected in sequence to a delivery pipe, a hose, and a seawater tank transfer pipe; the dock gate straight-through valve and the delivery pipe are connected through a dock gate interface seat plate and a dock gate transfer pipe; the dock gate transfer pipe includes a trumpet-shaped pipe, with a large end interface flange and a small end interface flange respectively provided at both ends of the trumpet-shaped pipe; the cooling water supply system also includes several supports, which are respectively arranged below the dock gate interface seat plate and the seawater tank transfer pipe, serving a supporting function.

[0008] Preferably, the seawater transfer pipe is a box with one open end that fits into the ship's seawater tank. The other end of the seawater transfer pipe is equipped with a seawater tank transfer pipe flange. The top of the box is equipped with a protruding gooseneck pipe and a box eye plate. The bottom corner of the box is equipped with a bend and a waterproof valve that fits into the bend.

[0009] Furthermore, the dock gate direct-connect valve includes a long steel pipe with a short steel pipe at each end. The long steel pipe and the short steel pipe are connected by a steel pipe valve to form a water flow channel that runs through the inside and outside of the dock gate. One end of the short steel pipe passes through the dock gate and is directly connected to the dock gate interface plate.

[0010] Furthermore, the eye plate of the tank body is set parallel to the flange of the seawater tank transfer pipe for lifting the seawater transfer pipe, and the large diameter of the open end is larger than the diameter of the inlet end of the ship's seawater tank.

[0011] Furthermore, the dock gate interface seat plate is circular in shape and is welded to the dock gate to match the water outlet end of the dock gate straight-through valve. The diameter of the dock gate interface seat plate is larger than the diameter of the water outlet end.

[0012] Furthermore, the top of the trumpet-shaped pipe is equipped with two pipe eye plates for lifting the dock gate pipe.

[0013] Furthermore, the hose is a flexible non-metallic hose, and the hose is connected to the regulating valve by bolts.

[0014] The method of using the dock gate's internal cooling water supply system is characterized by: a) installing the internal cooling water supply system by welding the dock gate interface plate to the dock gate and aligning it with the dock gate straight-through valve, and assembling and welding the seawater tank transfer pipe to the opening of the ship's seawater tank; b) sequentially connecting the dock gate transfer pipe, delivery pipe, regulating valve, and hose between the dock gate interface plate and the seawater tank transfer pipe; c) adjusting the valves by first closing the regulating valve, then sequentially opening the inner and outer steel pipe valves of the dock gate straight-through valve, with the inner steel pipe valve opening angle being smaller than the outer steel pipe valve opening angle; then opening the regulating valve, allowing water to be seen emerging from the gooseneck bend at the top of the seawater tank transfer pipe; d) starting the ship's internal cooling water system, with a small amount of water continuing to emerge from the vent pipe at the top of the seawater tank transfer pipe, which is normal; e) after cooling is complete, closing the regulating valve and the steel pipe valve; f) draining the water stored in the seawater transfer pipe, and sequentially disassembling each component of the internal cooling water supply system.

[0015] In step d, if no water comes out, the opening of the regulating valve should be increased; if this is ineffective, the opening of the steel pipe valves at both ends of the dock gate straight pipe should be increased until water comes out.

[0016] Furthermore, in step e, the opening of the regulating valve is slowly reduced until water no longer emerges from the vent pipe at the top of the seawater tank transfer pipe, or only occasionally. Then the regulating valve is closed, and then the steel pipe valves at both ends of the dock gate straight pipe are closed in sequence.

[0017] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects:

[0018] 1. The improved solution described in this invention is provided with a dock gate straight-through valve that runs through the dock gate. One end of the dock gate straight-through valve is the water inlet end, which is connected to the water area outside the dock gate. The other end is the water outlet end, which is connected to the ship's seawater tank after being connected to a delivery pipe, a hose and a seawater tank transfer pipe in sequence. This provides cooling water for equipment debugging in the dock, which is conducive to shortening the shipbuilding cycle. At the same time, it utilizes natural water for cooling, which is economical, environmentally friendly and low in cost.

[0019] 2. In the technical solution of the present invention, water is drawn in by utilizing the existing dock gate, without the need for additional pumps, external pipelines, or on-site power supply. The nearest dock gate direct pipe outlet can be selected as the water intake according to the actual situation, which is conducive to the shortest water supply pipeline and convenient and quick construction.

[0020] 3. In the technical solution of the method of use of the present invention, the modification and upgrading of permanent facilities only involves installing interface seat plates at the outlet of the straight pipe on the inner wall of the dock gate. The amount of construction is small and the facilities can be reused after installation. The construction process has no impact on the function of the dock gate. Interface seat plates can be installed at multiple outlets of the straight pipe in the dock gate at the same time, so that ships in different positions in the dock can use them at will.

[0021] 4. The present invention has a simple structure, reasonable layout, is easy to use, and is easy to promote and utilize. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a seawater tank on the side of a ship in the prior art.

[0023] Figure 2 This is a schematic diagram of a dock cooling water supply system that requires a dedicated water pump in the existing technology.

[0024] Figure 3 This is a schematic diagram of the structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of the dock gate interface plate of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the dock gate adapter pipe of the present invention.

[0027] Figure 6 This is a schematic diagram of the seawater tank transfer pipe of the present invention.

[0028] Figure label:

[0029] 1. Dock gate straight-through valve, 2. Dock gate interface seat plate, 3. Dock gate adapter pipe, 4. Delivery pipe, 5. Regulating valve, 6. Hose, 7. Seawater tank adapter pipe, 8. Support frame, 9. Dock gate, 10. Ship seawater tank;

[0030] 11 Long steel pipe, 12 Short steel pipe, 13 Steel pipe valve;

[0031] 31. Trumpet-shaped pipe; 32. Large end interface flange; 33. Small end interface flange; 34. Adaptor pipe eye plate.

[0032] 71 Flange, 72 Drain valve, 73 Elbow, 74 Gooseneck elbow, 75 Box eye plate. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides a dock cooling water supply system utilizing a dock gate, including the dock gate, see details below. Figure 3The difference between this system and existing technologies lies in the following: a gate straight-through valve is installed inside the gate, with one end being the inlet end, which connects to the water outside the gate, and the other end being the outlet end. The outlet end is connected to the ship's seawater tank via a sequentially connected delivery pipe, a hose, and a seawater tank transfer pipe. The gate straight-through valve and the delivery pipe are connected via a gate interface seat plate and a gate transfer pipe. The gate transfer pipe includes a flared pipe with a large-end interface flange and a small-end interface flange at both ends. The cooling water supply system also includes several supports, which are located below the gate interface seat plate and the seawater tank transfer pipe, providing support.

[0035] In practice, this invention provides a water supply system, which uses a straight-through valve to add one or more interface plates, and builds corresponding pipelines and accessories inside the dock, so that the dock gate, a single-function structure, can supply water to the ship for commissioning. It can introduce sea (river) water from outside the dock into the dock, and realize the non-powered, low-cost and rapid supply of cooling water for ship equipment commissioning inside the dock. Example 1

[0036] In this implementation, a gate straight-through valve is installed inside the gate. One end of the gate straight-through valve is the water inlet, which is connected to the water outside the gate. The other end is the water outlet, which is connected to the ship's seawater tank via a delivery pipe, a hose, and a seawater tank transfer pipe in sequence. The gate straight-through valve and the delivery pipe are connected via a gate interface seat plate and a gate transfer pipe. The gate transfer pipe includes a flared pipe with a large-end interface flange and a small-end interface flange at both ends. The cooling water supply system also includes several supports, which are located below the gate interface seat plate and the seawater tank transfer pipe to provide support.

[0037] Specifically, the seawater transfer pipe is a box-shaped structure with one open end. The open end mates with the ship's seawater tank, covering the tank opening and welding it to the hull to maintain a watertight seal. The other end of the transfer pipe has a flange for connecting to a hose. The top of the box features a raised gooseneck tube and an eyelet plate. The gooseneck tube has a 180-degree bend at the top with an open end for ventilation. At the bottom corner of the box, there is a bend and a waterproof valve that mates with it. The bend extends into the valve body, with its western end flush against the bottom of the box to ensure thorough drainage. The eyelet plate is parallel to the flange for lifting the transfer pipe, and the larger diameter of the open end is larger than the inlet diameter of the ship's seawater tank.

[0038] The dock gate straight-through valve consists of a long steel pipe with a short steel pipe at each end. The long and short steel pipes are connected by a valve, forming a water flow channel connecting the inside and outside of the dock gate. One end of the short steel pipe passes through the dock gate and connects directly to the dock gate interface plate. The dock gate straight-through valve is normally closed. In use, the inner and outer steel pipe valves are opened sequentially. When not in use, the outer and inner steel pipe valves are closed sequentially. The flow rate can be controlled by adjusting the opening of the steel pipe valves.

[0039] The dock gate interface plate is annular and welded to the dock gate, mates with the outlet end of the dock gate straight-through valve, and its diameter is larger than the outlet diameter. Specifically, the dock gate interface plate is a newly added permanent facility, a circular flange plate, i.e., a ring-shaped thick steel plate, with multiple evenly spaced, circularly distributed threaded holes on its surface. The depth of the threaded holes is less than the thickness of the steel plate. The inner diameter of the ring is larger than the opening of the dock gate straight-through pipe on the inner wall of the dock gate, allowing it to be welded to the dock gate wall surface surrounding the opening.

[0040] The top of the flared pipe has two transfer pipe eye plates for lifting the dock gate transfer pipe. The delivery pipe is a straight pipe with identical circular flanges at both ends, matching the small end flange of the dock gate transfer pipe. Multiple delivery pipes are connected end-to-end with bolts, the first end connecting to the small end flange of the dock gate transfer pipe, and the last end near the ship's seawater tank. The regulating valve is a single valve that can be opened, closed, and its opening adjusted to control the flow of water and regulate the supply pipeline. Both ends of the regulating valve are matched to the flanges of the delivery pipe and connected to the last end of the delivery pipe.

[0041] Flexible hoses are used to adjust pipeline routing, facilitate connections, and improve pipeline adaptability. Their diameter and interfaces are consistent with the delivery pipe; one end connects to the regulating valve, and the other end connects to the seawater tank adapter. Depending on the actual pipeline layout requirements, more hoses can be inserted at other locations along the pipeline. The hoses are flexible, non-metallic, and are connected to the regulating valve using bolts. Example 2

[0042] In this embodiment, the dock gate direct-connection valve 1 is located in the equipment room inside the dock gate, at a lower position. It includes one long steel pipe 11, two short steel pipes 12, and two steel pipe valves 13. One end of each of the two short steel pipes 11 is welded from inside the dock gate to an opening on the inner and outer walls of the dock gate, respectively; the other end of each pipe is connected to a steel pipe valve 13 via a flange. The long straight pipe 11 is connected between the two steel pipe valves 13 via flanges, thus forming a water flow channel running through the inside and outside of the dock gate. The two steel pipe valves 13 jointly control the opening and closing of the channel. There are generally multiple sets of dock gate direct-connection valves 1 and their corresponding dock gate wall openings, arranged horizontally side-by-side in the equipment room inside the dock gate, serving to inject water into the dock.

[0043] The dock gate interface plate 2 is a circular thick steel plate, welded to the outer circumference of the opening on the inner wall of the dock gate's straight-through valve 1. Multiple threaded holes are provided on its circular surface, evenly spaced in a circular pattern. None of the holes are drilled through, allowing the circular steel plate to function as a flange seat. Once welded to the inner wall of the dock gate, the dock gate interface plate 2 is permanently retained.

[0044] The dock gate adapter pipe 3 includes a flared pipe 31, with a large-end interface flange 32 and a small-end interface flange 33 at both ends, and an adapter pipe eye plate 34 at the top. The large-end interface flange 32 is larger, and its inner and outer diameters and bolt hole distribution are consistent with the dock gate interface seat plate 2. The small-end interface flange 33 is smaller, and its specifications match the corresponding pipe diameter at that end, which is determined by the maximum demand flow of this water supply system. Two adapter pipe eye plates 34 are provided along the axis on the surface of the flared pipe 31. In use, the two adapter pipe eye plates 34 face upwards for lifting. In use, the large-end interface flange 32 is connected to the dock gate interface seat plate 2 by bolts.

[0045] The delivery pipe 4 is a straight pipe, and the number of delivery pipes 4 is determined by the distance between the seawater tank on the side of the vessel in the dock and the nearest dock gate interface plate 2. The greater the distance, the more delivery pipes 4 are needed. In use, multiple delivery pipes 4 should be connected end to end, and their leading ends should be bolted to the small end interface flange 33 of the dock gate transfer pipe 3.

[0046] The regulating valve 5 is a valve that controls opening and closing, and its opening degree, used to regulate flow. Both its inlet and outlet have flange interfaces, and the flange specifications are consistent with the small end interface flange 33 of the dock gate adapter pipe 3. In use, the inlet end of this valve is bolted to the end of the series-connected delivery pipe 4.

[0047] Hose 6 is a non-metallic tube of appropriate length and sufficient strength that can be bent, such as a fiber-reinforced rubber hose or a steel wire-reinforced rubber hose. It has flange connections at both ends, with flange specifications consistent with the small end flange 33 of the dock transfer pipe 3. In use, one end is connected to the outlet end of the regulating valve 5 via bolts.

[0048] The seawater tank transfer pipe 7 is a box-shaped body with one open side. The opening is slightly larger than the opening of the ship's seawater tank, allowing the open side to cover the outside of the seawater tank opening. A flange interface 71 is located on the opposite side of the opening, with specifications identical to the small end interface flange 33 of the dock gate transfer pipe 3. Near the bottom of this side is a drain valve 72, with a downward-facing bend 73 extending inwards from the valve, the end of which is close to the bottom plate of the box-shaped body. An upward-facing gooseneck pipe 74 is located on the top plate of the box-shaped body. Two box-shaped eye plates 75 are located on the top plate, parallel to the flange 71, for lifting. In use, the flange 71 is bolted to the end of the hose 6; the open side covers the outside of the ship's seawater tank opening and is welded and sealed to the hull plate; after use, the drain valve 72 is opened first, and the water inside flows out through the bend 73 and drain valve 72 under siphon action; after the water is drained, the weld between the open side and the hull plate is cut to remove the pipe.

[0049] The support frame 8 supports the various components that serve as the water supply channel at an appropriate height from the dock bottom, while also securing these components. Common shipyard materials for the support frame can be channel steel, scaffolding pipes, etc. The erection height depends on the distance between the dock gate straight-through valve 1 and the ship's seawater tank opening from the dock bottom; the flexible hose 6 can compensate for some of the height deviation.

[0050] In another embodiment of the present invention, the center height of the small end interface flange 33 of the dock gate adapter pipe 3 is appropriately lower than that of the large end interface flange 32, for example, by 3-12 cm, so that the dock gate adapter pipe 3 is no longer an axisymmetric structure. This setting is suitable for situations where the dock gate straight-through valve 1 is high above the dock bottom, which helps to reduce the height of the entire water supply system and improves the safety and convenience of construction.

[0051] As a further improvement of the present invention, dock gate interface plates 2 can be installed on the inner wall openings of the straight-through valves 1 located in the left, center, and right positions (or all) of the dock gate. When the ship is located in different positions in the dock, a suitable interface plate can be selected nearby to make the water supply pipeline as short and straight as possible. In a further improvement, the installation position of the hose 6 is not limited to being used adjacent to the seawater tank transfer pipe 7. Multiple hoses can be used in series, or they can be installed between sections of the delivery pipe 4. However, it should be avoided as much as possible to use it adjacent to the dock gate transfer pipe 3 to avoid damage that may be caused by the impact of large water flows. Example 3

[0052] The method of using the dock gate's internal cooling water supply system is characterized by: a) installing the internal cooling water supply system by welding the dock gate interface plate to the dock gate and aligning it with the dock gate straight-through valve, and assembling and welding the seawater tank transfer pipe to the opening of the ship's seawater tank; b) sequentially connecting the dock gate transfer pipe, delivery pipe, regulating valve, and hose between the dock gate interface plate and the seawater tank transfer pipe; c) adjusting the valves by first closing the regulating valve, then sequentially opening the inner and outer steel pipe valves of the dock gate straight-through valve, with the inner steel pipe valve opening angle being smaller than the outer steel pipe valve opening angle; then opening the regulating valve, allowing water to be seen emerging from the gooseneck bend at the top of the seawater tank transfer pipe; d) starting the ship's internal cooling water system, with water continuing to emerge from the vent pipe at the top of the seawater tank transfer pipe, indicating normal operation; e) after cooling is complete, closing the regulating valve and steel pipe valves; f) draining the water stored in the seawater transfer pipe, and sequentially disassembling each component of the internal cooling water supply system.

[0053] Specifically, in step d, if no water comes out, the opening of the regulating valve should be increased; if this is ineffective, the opening of the steel pipe valves at both ends of the dock gate straight pipe should be increased until water comes out.

[0054] In step e, slowly reduce the opening of the regulating valve until water no longer emerges from the vent pipe at the top of the seawater tank transfer pipe, or only occasionally. Then close the regulating valve, and then close the steel pipe valves at both ends of the dock gate straight pipe in sequence.

[0055] In step f, open the drain valve of the seawater tank transfer pipe to release the water inside. Then, use an oxy-acetylene torch to cut the seawater tank transfer pipe off the hull. Next, remove the seawater tank transfer pipe and hoses. Then, open the regulating valve to release the remaining water in the pipeline. Finally, disassemble the regulating valve, each delivery pipe section, dock gate transfer pipe, and each support. Transport all components and related materials away from the site.

[0056] The beneficial effects of this invention are:

[0057] (1) It provides cooling water for equipment commissioning in the dock, which helps to shorten the shipbuilding cycle.

[0058] (2) Utilizing natural water bodies (seawater, river water) is economical.

[0059] (3) Water can be drawn in by utilizing existing dock gate facilities, without the need for additional pumps, external pipelines, or on-site power supply, making construction convenient.

[0060] (4) The starting point of the water supply system is located at the bottom of the dock gate. The nearest dock gate direct pipe outlet can be selected as the water intake according to the actual situation, which is conducive to the shortest water supply pipeline and the minimum construction amount.

[0061] (5) The modification and alteration of permanent facilities only involves the installation of interface plates at the outlet of the straight pipe on the inner wall of the dock gate. The amount of construction is small and the facilities can be reused after installation. The construction process has no impact on the function of the dock gate. Interface plates can be installed at multiple outlets of the straight pipe in the dock gate at the same time, so that ships in different positions in the dock can choose to use them.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A method for using a cooling water supply system in a dock with a dock gate, wherein a dock gate through pipe valve is arranged in the dock gate, one end of the dock gate through pipe valve is a water inlet end, the water inlet end is connected with a water area outside the dock gate, the other end is a water outlet end, the water outlet end is connected with a ship water tank through a sequentially connected delivery pipe, a hose and a sea water tank adapter pipe; the dock gate through pipe valve is connected with the delivery pipe through a dock gate interface seat plate and a dock gate adapter pipe; the dock gate adapter pipe comprises a horn-shaped pipe, both ends of the horn-shaped pipe are respectively provided with a large end interface flange and a small end interface flange; the cooling water supply system further comprises a plurality of supports, the supports are arranged below the dock gate interface seat plate to the sea water tank adapter pipe and play a supporting role; the sea water tank adapter pipe is a box with one open end, the open end is matched with the ship water tank, the other end of the sea water tank adapter pipe is provided with a sea water tank adapter pipe flange, a convex goose neck pipe and a box eye plate are arranged on the top of the box, a bend pipe and a drain valve matched with the bend pipe are arranged at the bottom corner of the box; the dock gate through pipe valve comprises a long steel pipe, both ends of the long steel pipe are respectively provided with a short steel pipe, the long steel pipe and the short steel pipe are connected through a steel pipe valve, forming a water flow channel through the inside and outside of the dock gate; one end of the short steel pipe passes through the dock gate and is directly connected with the dock gate interface seat plate, characterized in that: a, carry out the installation of the dock cooling water supply system, weld the dock gate interface seat plate on the dock gate, and assemble and weld the seawater tank adapter pipe with the opening of the ship's seawater tank; b, connect the dock gate adapter pipe, the delivery pipe, the regulating valve and the hose in turn between the dock gate interface seat plate and the seawater tank adapter pipe; c, carry out valve adjustment, first close the regulating valve, open the steel pipe valves inside and outside the dock gate straight-through pipe valve in turn, the opening angle of the steel pipe valve inside is smaller than that of the steel pipe valve outside; then open the regulating valve, and water can be seen from the goose neck pipe at the top end of the seawater tank adapter pipe; d, start the ship cooling water system, and a small amount of water continues to come out from the air pipe at the top end of the seawater tank adapter pipe as normal; e, when the cooling is finished, close the regulating valve and the steel pipe valve; f, drain the water in the seawater tank adapter pipe, and remove the components of the dock cooling water supply system in turn.

2. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: The dock gate interface seat plate is annular, and is welded on the dock gate to cooperate with the water outlet end of the dock gate straight-through pipe valve, and the diameter of the dock gate interface seat plate is larger than that of the water outlet end.

3. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: The box eye plate is arranged in parallel with the flange of the seawater tank adapter pipe to hoist the seawater tank adapter pipe, and the diameter of the open end is larger than that of the inlet end of the ship's seawater tank.

4. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: The top of the trumpet-shaped pipe is provided with two adapter pipe eye plates for hoisting the dock gate adapter pipe.

5. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: The hose is a flexible non-metal hose, and the hose is connected with the regulating valve through bolts.

6. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: In step d, if no water comes out, the opening of the regulating valve should be increased; if it is invalid, the opening of the steel pipe valves at both ends of the dock gate straight-through pipe valve should be increased until water comes out.

7. The method of using a dock-internal cooling water supply system with a dock door according to claim 1, characterized in that: In step e, slowly reduce the opening of the regulating valve until no water comes out from the air pipe at the top end of the seawater tank adapter pipe, or occasionally, then close the regulating valve, and then close the steel pipe valves at both ends of the dock gate straight-through pipe valve in turn.

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