System for supplying cooling water in dock using dock gate and method for using same

Abstract

The invention relates to a cooling water supply system in a dock using a dock gate, a dock gate straight-through pipe valve penetrating through the dock gate is arranged in the dock gate, one end of the dock gate straight-through pipe valve is a water inlet end, the water inlet end is communicated with a water area outside the dock gate, the other end of the dock gate straight-through pipe valve is a water outlet end, and the water outlet end is connected with a ship seawater tank after being sequentially connected with a conveying pipe, a hose and a seawater tank adapter pipe; the dock gate straight-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, and a large-end connector flange and a small-end connector flange are arranged at the two ends of the horn-shaped pipe respectively. The cooling water supply system further comprises a plurality of supports, and the supports are arranged below the dock gate interface seat plate and the seawater tank transfer pipe and play a supporting role. In implementation, the invention provides a set of water supply system, that is, one or more interface seat plates are added by utilizing the straight-through pipe valves, and corresponding pipelines and accessories are built in the dock, so that the dock gate, which is a single-function structure, has the function of debugging and supplying water to a ship, seawater outside the dock can be introduced into the dock, and the water supply efficiency is improved. And unpowered, low-cost and quick supply of water for debugging and cooling the ship equipment in the dock is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding technology, specifically to a cooling water supply system in a dock using a dock door and a method of using the system, and more particularly to a system using the dock door to supply equipment cooling water to a ship under construction in the dock and a method of using the system. Background Art

[0002] In the prior art, ship construction needs to go through the equipment debugging stage. During the operation and debugging of equipment with cooling requirements such as generator sets, a stable and continuous external water supply is required to support the operation of the cooling water system. Therefore, equipment debugging is generally carried out after the ship is launched, so that it is convenient for the ship to directly draw sea (river) water from the side seawater tank for cooling when it is moored at the dock. Figure 1 shown.

[0003] With the improvement of shipbuilding efficiency and the application of advanced construction models, there is an urgent need to debug equipment before the ship is launched (in the dock). Land tap water is neither economical nor easy to meet the flow requirements. At present, there is a method of using a water pump to extract sea (river) water from the dock gate and connect it to the ship's cooling system through a pipeline, such as Figure 2 This method requires water pumps and electricity, as well as pipes that go over the dock gate. The system is complex, the installation is cumbersome, and the construction efficiency is low.

[0004] When a ship floats in a dock or enters a dock from outside, it must first be filled with water. However, the water injection flow rate is generally much greater than the cooling water flow rate required for the aforementioned equipment commissioning, which will cause unnecessary impact on the cooling system and damage the equipment.

[0005] Therefore, there is an urgent need in the market for a cooling water supply system in a dock using a dock door, which can accurately control the water injection amount, ensure the cooling effect, and is easy to disassemble and assemble. Summary of the invention

[0006] The purpose of the present invention is to provide a cooling water supply system in a dock using a dock door and a method of using the same. Through structural improvement, cooling water guarantee can be provided for equipment commissioning in the dock, which is beneficial to shortening the shipbuilding cycle. At the same time, the installation and disassembly construction are convenient, environmentally friendly and energy-saving, and the cost is low.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is: a cooling water supply system in a dock utilizing a dock gate, comprising a dock gate, characterized in that: a dock gate straight-through pipe valve penetrating the dock gate is provided in the dock gate, one end of the dock gate straight-through pipe valve is a water inlet end, the water inlet end is connected to the water area outside the dock gate, and the other end is a water outlet end, the water outlet end is connected to the ship's seawater tank by sequentially connecting a delivery pipe, a hose and a seawater tank transfer pipe; the dock gate straight-through pipe 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 comprises a trumpet-shaped pipe, and a large-end interface flange and a small-end interface flange are respectively provided at both ends of the trumpet-shaped pipe; the cooling water supply system also comprises a plurality of brackets, which are arranged below the dock gate interface seat plate to the seawater tank transfer pipe to play a supporting role.

[0008] Preferably, the seawater transfer pipe is a box with one side open, the open end cooperates with the ship's seawater box, the other end of the seawater transfer pipe is provided with a seawater box transfer pipe flange, the top of the box is provided with a raised gooseneck pipe and a box eye plate, and the bottom corner of the box is provided with a bend and a waterproof valve cooperating with the bend.

[0009] Furthermore, the dock gate straight-through pipe valve includes a long steel pipe, with a short steel pipe provided 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 running through the inside and outside of the dock gate; the short steel pipe at one end passes through the dock gate and is directly connected to the dock gate interface seat plate.

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

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

[0012] Furthermore, two transfer tube eye plates are provided on the top of the trumpet-shaped tube for hoisting the dock door transfer tube.

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

[0014] The method for using the cooling water supply system in the dock using the dock gate is characterized by: a. installing the cooling water supply system in the dock, welding the dock gate interface seat plate to the dock gate, and corresponding to the dock gate straight-through pipe valve, assembling and welding the seawater tank transfer pipe and the opening of the ship's seawater tank; b. connecting the dock gate transfer pipe, the delivery pipe, the regulating valve and the hose in sequence between the dock gate interface seat plate and the seawater tank transfer pipe; c. adjusting the valve, first closing the regulating valve, opening the steel pipe valves inside and outside the dock gate straight-through pipe valve in sequence, the opening angle of the steel pipe valve inside is smaller than the opening angle of the steel pipe valve outside; then opening the regulating valve, water can be seen emerging from the gooseneck elbow at the top of the seawater tank transfer pipe; d. starting the ship's cooling water system, a small amount of water continues to emerge from the vent pipe at the top of the seawater tank transfer pipe as a normal state; e. after cooling is completed, closing the regulating valve and the steel pipe valve; f. releasing the stored water in the seawater transfer pipe, and dismantling the components of the cooling water supply system in the dock in sequence.

[0015] In step d, if no water comes out, the opening of the regulating valve should be increased; if it does not work, 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 comes out of the vent pipe at the top of the seawater tank transfer pipe, or occasionally comes out, and then the regulating valve is closed, and then the steel pipe valves at both ends of the dock door straight pipe are closed in turn.

[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: 1. The improvement scheme of the present invention is that a dock gate straight-through pipe valve penetrating the dock gate is provided in the dock gate, one end of the dock gate straight-through pipe valve is a water inlet end, the water inlet end is connected to the water area outside the dock gate, and the other end is a water outlet end, the water outlet end is connected to the ship's seawater tank by sequentially connecting a delivery pipe, a hose and a seawater tank transfer pipe, so as to provide cooling water guarantee for equipment commissioning in the dock, which is conducive to shortening the shipbuilding cycle, and at the same time, natural water is used for cooling, which is economical, environmentally friendly and has a low cost; 2. In the technical solution of the present invention, the existing dock gate is used to realize water diversion, and no additional pumps, pipelines outside the dock, or on-site power supply is required. The nearest dock gate straight pipe outlet can be selected as the water intake according to actual conditions, which is conducive to the shortest water supply pipeline and convenient and quick construction; 3. In the technical solution of the method of use of the present invention, the modification of permanent facilities only involves the installation of an interface seat plate at the straight pipe outlet on the inner wall of the dock door, which requires little construction and can be reused after installation. The construction process has no effect on the function of the dock door. Interface seat plates can be installed at multiple straight pipe outlets of the dock door at the same time, so that ships at different positions in the dock can choose to use them. 4. The present invention has a simple structure, reasonable layout, and is easy to use and popularize and utilize. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a seawater tank on the side of a ship in the prior art.

[0019] Figure 2 The present invention is a schematic diagram of a cooling water supply system in a dock that requires a special water pump in the prior art.

[0020] Figure 3 It is a structural schematic diagram of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the dock door interface seat plate of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the dock door transfer tube of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the seawater tank transfer pipe of the present invention.

[0024] Reference numerals: 1. Dock door straight-through pipe valve, 2. Dock door interface seat plate, 3. Dock door transfer pipe, 4. Delivery pipe, 5. Regulating valve, 6. Hose, 7. Seawater tank transfer pipe, 8. Bracket, 9. Dock door, 10. Ship seawater tank; 11 long steel pipe, 12 short steel pipe, 13 steel pipe valve; 31 trumpet-shaped pipe, 32 large end interface flange, 33 small end interface flange, 34 adapter tube eye plate; 71 flange, 72 drain valve, 73 elbow, 74 gooseneck elbow, 75 box eye plate. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a cooling water supply system in a dock using a dock door, including a dock door, see Figure 3The difference between the present invention and the prior art lies in that: a dock gate straight-through pipe valve penetrating the dock gate is arranged in the dock gate, one end of the dock gate straight-through pipe valve is a water inlet end, the water inlet end is connected with the water area outside the dock gate, and the other end is a water outlet end, the water outlet end is connected with the ship's seawater tank by sequentially connecting a delivery pipe, a hose and a seawater tank transfer pipe; the dock gate straight-through pipe 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, and a large end interface flange and a small end interface flange are respectively arranged at both ends of the trumpet-shaped pipe; the cooling water supply system also includes a plurality of brackets, which are arranged below the dock gate interface seat plate to the seawater tank transfer pipe to play a supporting role.

[0027] In practice, the present invention provides a water supply system, which utilizes a straight-through pipe valve to add one or more interface seat plates, and builds corresponding pipelines and accessories in the dock, so that the dock door, a single-function structure, has the function of supplying water to ship commissioning, and can introduce sea (river) water outside the dock into the dock, thereby realizing the non-powered, low-cost and rapid supply of cooling water for ship equipment commissioning in the dock. Example 1

[0028] In this embodiment, a dock gate straight-through pipe valve penetrating the dock gate is provided in the dock gate, one end of the dock gate straight-through pipe 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 by sequentially connecting a delivery pipe, a hose and a seawater tank transfer pipe; the dock gate straight-through pipe 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, and a large-end interface flange and a small-end interface flange are respectively provided at both ends of the trumpet-shaped pipe; the cooling water supply system also includes a plurality of brackets, which are arranged below the dock gate interface seat plate to the seawater tank transfer pipe to play a supporting role.

[0029] Specifically, the seawater transfer pipe is a box with one side open, and the open end cooperates with the ship's seawater tank, which is used to cover the outside of the ship's seawater tank opening, welded to the hull outer plate and kept watertight; the other end of the seawater transfer pipe is provided with a seawater tank transfer pipe flange for connecting with a hose, and the top of the box is provided with a raised gooseneck pipe and a box eye plate, the top of the gooseneck pipe is a 180-degree bent pipe with an open end for ventilation, and a bend pipe and a waterproof valve that cooperates with the bend pipe are provided at the bottom corner of the box, and the bend pipe extends to the inside of the valve body, and the west end of the bend pipe is close to the bottom of the box, so that the drainage is as clean as possible. The box eye plate is arranged in parallel with the seawater tank transfer pipe flange 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.

[0030] The dock gate straight-through pipe 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 through a steel pipe valve to form a water flow channel that runs through the inside and outside of the dock gate; the short steel pipe at one end passes through the dock gate and is directly connected to the dock gate interface seat plate. The dock gate straight-through pipe valve is usually closed. When in use, the inner and outer steel pipe valves can be opened in turn; when out of use, the outer and inner steel pipe valves can be closed in turn, and the size of the introduced flow can be controlled by adjusting the opening of the steel pipe valve.

[0031] The dock gate interface seat plate is in the shape of a circular ring and is welded to the dock gate. It matches the outlet end of the dock gate straight-through pipe valve. The diameter of the dock gate interface seat plate is larger than the diameter of the outlet end. Specifically, the dock gate interface seat plate is a newly added permanent facility. It is a circular flange seat plate, that is, a thick annular steel plate. There are multiple threaded holes evenly spaced and distributed in a circular shape on the annular 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, so that it can be welded to the dock gate wall outside the opening.

[0032] Two transfer eye plates are provided on the top of the trumpet-shaped pipe for hoisting the dock gate transfer pipe. The delivery pipe is a straight pipe with circular flanges of the same specifications at both ends, which are consistent with the small end interface flange of the dock gate transfer pipe. Multiple delivery pipes are connected front and back with bolts, with the head end connected to the small end interface flange of the dock gate transfer pipe and the tail end close to the ship's seawater tank. The regulating valve is a valve that can be opened, closed, and adjusted to control the on-off of the water supply pipeline and adjust the flow rate. The interfaces at both ends of the regulating valve match the delivery pipe flange and are connected to the tail end of the delivery pipe.

[0033] The hose is used to adjust the direction of the pipeline, facilitate connection, and improve the adaptability of the pipeline. Its diameter and interface are consistent with the delivery pipe. One end is connected to the regulating valve and the other end is connected to the seawater tank transfer pipe. According to the actual layout of the pipeline, more hoses can be inserted in other positions of the pipeline. The hose is a flexible non-metallic hose, and the hose and the regulating valve are connected by bolts. Example 2

[0034] In this embodiment, the dock gate straight-through pipe valve 1 is arranged in the equipment room inside the dock gate, at the lower part of the dock gate. It includes a long steel pipe 11, two short steel pipes 12, and two steel pipe valves 13. One end of the two short steel pipes 11 is welded to the openings on the inner and outer walls of the dock gate from the inside of the dock gate, and the other end is connected to a steel pipe valve 13 through a flange. The long straight pipe 11 is connected between the two steel pipe valves 13 through a flange. Thus, a water flow channel that runs across the inside and outside of the dock gate is formed. The two steel pipe valves 13 jointly control the opening and closing of the channel. There are generally multiple sets of dock gate straight-through pipe valves 1 and their corresponding dock gate wall openings, which are horizontally arranged in parallel in the equipment room inside the dock gate to play the role of injecting water into the dock.

[0035] The dock gate interface seat plate 2 is a thick steel plate in an annular shape, which is welded to the outer periphery of the opening of the dock gate straight pipe valve 1 on the inner wall of the dock gate. There are multiple threaded holes on the annular surface, and the holes are evenly spaced in a circle. None of the holes are drilled through, so that the annular steel plate plays the role of a flange seat plate. After the dock gate interface seat plate 2 is welded to the inner wall of the dock gate, it is permanently retained.

[0036] The dock gate transfer pipe 3 includes a trumpet-shaped pipe 31, a large end interface flange 32, a small end interface flange 33, and a transfer pipe eye plate 34 at the top. The large end interface flange 32 is relatively large, and its inner and outer diameters and bolt hole distribution are consistent with the dock gate interface base plate 2. The small end interface flange 33 is relatively small, and its specifications match the corresponding pipe diameter at this end, and the pipe diameter is determined by the maximum required flow rate of this water supply system. Two transfer pipe eye plates 34 are provided on the surface of the trumpet-shaped pipe 31 along the axis. When in use, the two transfer pipe eye plates 34 face upward for lifting. When in use, the large end interface flange 32 is connected to the dock gate interface base plate 2 by bolts.

[0037] The delivery pipe 4 is a straight pipe, and the number of the delivery pipes 4 is determined by the distance between the side seawater tank of the ship in the dock and the nearest dock door interface seat plate 2 installed. The farther the distance, the more the number of delivery pipes 4. When in use, multiple delivery pipes 4 should be connected end to end, and their front ends are connected to the small end interface flange 33 of the dock door transfer pipe 3 by bolts.

[0038] The regulating valve 5 is a valve that can be controlled to open and close and the opening degree, and is used to adjust the flow. Its inlet and outlet are both provided with flange interfaces, and the flange specifications are consistent with the small end interface flange 33 of the dock gate transfer tube 3. When in use, the inlet end of the valve is connected to the tail end of the series delivery pipe 4 by bolts.

[0039] The hose 6 is a non-metallic tube of appropriate length and sufficient strength, which can be bent, such as a fiber-reinforced rubber hose or a steel-wire-reinforced rubber hose. It has flange interfaces at both ends, and the flange specifications are consistent with the small end interface flange 33 of the dock door adapter tube 3. When in use, one end of it is connected to the outlet end of the regulating valve 5 by bolts.

[0040] The seawater tank transfer pipe 7 is a box-shaped body with one side open. The size of the opening is slightly larger than the opening of the ship's seawater tank, so that the open side can cover the periphery of the seawater tank opening. A flange interface 71 is provided on the opposite side of the opening, and its specifications are consistent with the small end interface flange 33 of the dock gate transfer pipe 3. There is a drain valve 72 near the bottom of this side, and the valve extends a downward curved pipe 73 to the inner side of the side wall, and the end of the curved pipe is close to the bottom plate of the box-shaped body. An upward gooseneck pipe 74 is provided on the top plate of the box-shaped body. Two box eye plates 75 are provided on the top plate, which are arranged in a direction parallel to the flange 71 for lifting. When in use, the flange 71 is connected to the end of the hose 6 by bolts; the opening on the opposite side covers the periphery of the opening of the ship's seawater tank, and is welded and sealed with the ship's plate; after use, the drain valve 72 is opened first, and the water stored inside will flow out through the curved pipe 73 and the drain valve 72 under the action of siphon; after the water is drained, the weld between the ship's plate is cut and it can be removed.

[0041] The bracket 8 supports the components of the water supply channel to a suitable height from the dock bottom, and also fixes the components. The bracket can be made of channel steel, scaffolding round pipe and other common shipyard materials. The installation height depends on the height of the dock gate straight pipe valve 1 and the ship's seawater tank opening from the dock bottom. The hose 6 can compensate for part of the height deviation.

[0042] As another embodiment of the present invention, the center height of the small end interface flange 33 of the dock gate transfer pipe 3 is lower than the large end interface flange 32 by a proper height, such as 3-12 cm, so that the dock gate transfer pipe 3 is no longer an axisymmetric structure. This arrangement is suitable for the case where the dock gate straight pipe valve 1 is higher than the dock bottom, which is conducive to reducing the height of the entire water supply system and improving the safety and convenience of construction.

[0043] As a further improvement of the present invention, the dock door interface seat plate 2 can be installed on the inner wall openings of the straight pipe valve 1 at the left, middle, right position (or all) of the dock door. When the ship is located at different positions of the dock, a suitable interface seat 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 next to the seawater tank transfer pipe 7. It can be used in series with multiple hoses or installed between pipe sections of the delivery pipe 4. However, it should be avoided to be used next to the dock door transfer pipe 3 as much as possible to avoid damage caused by large water flow impact. Example 3

[0044] The method for using the cooling water supply system in the dock using the dock gate is characterized by: a. installing the cooling water supply system in the dock, welding the dock gate interface seat plate to the dock gate, and corresponding to the dock gate straight-through pipe valve, assembling and welding the seawater tank transfer pipe and the opening of the ship's seawater tank; b. connecting the dock gate transfer pipe, the delivery pipe, the regulating valve and the hose in sequence between the dock gate interface seat plate and the seawater tank transfer pipe; c. adjusting the valve, first closing the regulating valve, opening the steel pipe valves inside and outside the dock gate straight-through pipe valve in sequence, and the opening angle of the steel pipe valve on the inside is smaller than the opening angle of the steel pipe valve on the outside; then opening the regulating valve, water can be seen emerging from the gooseneck elbow at the top of the seawater tank transfer pipe; d. starting the ship's cooling water system, and water continuing to emerge from the vent pipe at the top of the seawater tank transfer pipe is a normal state; e. after cooling is completed, closing the regulating valve and the steel pipe valve; f. releasing the water stored in the seawater transfer pipe, and dismantling the various components of the cooling water supply system in the dock in sequence.

[0045] Specifically, in step d, if no water comes out, the opening of the regulating valve should be increased; if it does not work, the opening of the steel pipe valves at both ends of the dock gate straight pipe should be increased until water is seen coming out.

[0046] In step e, slowly reduce the opening of the regulating valve until water no longer comes out of the vent pipe at the top of the seawater tank transfer pipe, or occasionally comes out, then close the regulating valve, and then close the steel pipe valves at both ends of the dock door straight pipe in turn.

[0047] In step f, open the drain cock of the seawater tank transfer pipe to release the water inside, then use gas cutting to cut the seawater tank transfer pipe from the hull, then remove the seawater tank transfer pipe and hose, then open the regulating valve to release the residual water in the pipeline. Finally, disassemble the regulating valve, each delivery pipe section, dock door transfer pipe, and each support. Transport all components and related materials away from the site.

[0048] Beneficial effects of the present invention: (1) It provides cooling water guarantee for equipment commissioning in the dock, which is conducive to shortening the shipbuilding cycle.

[0049] (2) Utilize natural water bodies (sea water, river water), which is economical.

[0050] (3) Water diversion is achieved by utilizing existing dock gate facilities, without the need for additional pumps or off-dock pipelines, and without the need to organize on-site power supply, making construction convenient.

[0051] (4) The starting point of the water supply system is located at the bottom of the dock gate. The nearest dock gate straight 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 smallest construction volume.

[0052] (5) The modification of permanent facilities only involves the installation of an interface seat plate at the straight pipe outlet on the inner wall of the dock gate. The construction workload is small and the device 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 straight pipe outlets of the dock gate at the same time, so that ships at different positions in the dock can use them conveniently.

[0053] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A cooling water supply system in a dock using a dock door, comprising a dock door, characterized in that: A dock gate straight-through pipe valve is provided inside the dock gate, one end of which is the water inlet end, which is connected to the water area outside the dock gate, and the other end is the water outlet end, which is connected to the ship's seawater tank by connecting the delivery pipe, the hose and the seawater tank transfer pipe in sequence; The dock gate straight-through pipe valve and the delivery pipe are connected through the dock gate interface seat plate and the dock gate transfer pipe; The dock gate transfer pipe comprises a trumpet-shaped pipe, and two ends of the trumpet-shaped pipe are respectively provided with a large end interface flange and a small end interface flange; The cooling water supply system also includes a number of brackets, which are arranged below the dock door interface base plate to the seawater tank transfer pipe to play a supporting role.

2. The cooling water supply system in a dock using a dock door according to claim 1, characterized in that: The dock gate interface seat plate is in the shape of a circular ring and is welded to the dock gate to match the water outlet end of the dock gate straight-through pipe valve. The diameter of the dock gate interface seat plate is larger than the diameter of the water outlet end.

3. The seawater transfer pipe is a box with one side open, and the open end cooperates with the ship's seawater box. The other end of the seawater transfer pipe is provided with a seawater box transfer pipe flange. The top of the box is provided with a raised gooseneck pipe and a box eye plate. The bottom corner of the box is provided with an elbow and a waterproof valve that cooperates with the elbow.

4. The cooling water supply system in a dock using a dock door according to claim 1, characterized in that: The dock gate straight-through pipe valve includes a long steel pipe, with short steel pipes at both ends of the long steel pipe respectively. The long steel pipe and the short steel pipe are connected through a steel pipe valve to form a water flow channel running through the inside and outside of the dock gate; The short steel pipe at one end passes through the dock door and is directly connected to the dock door interface base plate.

5. The cooling water supply system in a dock using a dock door according to claim 3, characterized in that: The box eye plate is arranged in parallel with the seawater box transfer pipe flange for lifting the seawater transfer pipe, and the large diameter of the open end is larger than the inlet end diameter of the ship's seawater box.

6. The cooling water supply system in a dock using a dock door according to claim 1, characterized in that: Two transfer tube eye plates are provided on the top of the trumpet-shaped tube for lifting the dock door transfer tube.

7. The cooling water supply system in a dock using a dock door according to claim 1, characterized in that: The hose adopts a flexible non-metallic hose, and the hose and the regulating valve are connected by bolts.

8. The method for using the cooling water supply system in a dock using a dock door according to claim 1, characterized in that: a. Install the cooling water supply system in the dock, weld the dock door interface seat plate to the dock door, and align it with the dock door straight pipe valve, and assemble and weld the seawater tank transfer pipe and the opening of the ship's seawater tank; b. Connect the dock door transfer pipe, delivery pipe, regulating valve and hose in sequence between the dock door interface seat plate and the seawater tank transfer pipe; c. Adjust the valve, first close the regulating valve, open the steel pipe valves inside and outside the dock door straight pipe valve in sequence, and the opening angle of the steel pipe valve on the inside is smaller than that of the steel pipe valve on the outside; then open the regulating valve, and water can be seen coming out of the gooseneck elbow at the top of the seawater tank transfer pipe; d. Start the cooling water system in the ship, and a small amount of water continues to come out of the vent pipe at the top of the seawater tank transfer pipe, which is normal; e. After cooling is completed, close the regulating valve and steel pipe valve; f. Release the water in the seawater transfer pipe, and remove the various components of the cooling water supply system in the dock in sequence.

9. The method for using the cooling water supply system in a dock using 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 does not work, the opening of the steel pipe valves at both ends of the dock gate straight pipe should be increased until water comes out.

10. The method for using the cooling water supply system in a dock using a dock door according to claim 1, characterized in that: In step e, slowly reduce the opening of the regulating valve until water no longer comes out of the vent pipe at the top of the seawater tank transfer pipe, or occasionally comes out, then close the regulating valve, and then close the steel pipe valves at both ends of the dock door straight pipe in turn.

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