Seawater cooling pipeline system and control method thereof

Abstract

The invention relates to the technical field of water supply and drainage, in particular to a seawater cooling pipeline system and a control method thereof.The seawater cooling pipeline system comprises a pump outlet water taking pipeline, a water conveying pipeline, a standby pipeline and a water drainage pipeline; the pump outlet water intake pipeline is connected with a water intake pump station; each pump outlet water taking pipeline is connected with one water conveying pipeline through a first pipeline, each pump outlet water taking pipeline is connected with a second pipeline through a water taking branch line, and the second pipeline is connected with the other water conveying pipeline; pump outlet water taking pipelines are provided with first valves, and water taking branch lines are provided with second valves; the pipeline system is further provided with a user side water conveying switching system and a user side drainage switching system. And a pipeline switching system is arranged between the user side water delivery switching system and the second pipeline. The standby pipeline in the pipeline system can serve as a water conveying pipeline or a water discharging pipeline temporarily, shutdown operation is not needed when the pipeline breaks down or needs to be overhauled, and normal operation of the water taking and discharging pipeline can be continuously kept.

Description

Technical Field

[0001] The invention relates to the technical field of water supply and drainage, and in particular to a seawater cooling pipeline system and a control method thereof. Background Art

[0002] The seawater cooling system is a cooling system that uses seawater as a cooling medium. It is widely used in industrial facilities that require a large amount of heat exchange, such as power plants, chemical plants, and refineries. The basic principle of this system is to extract seawater from the ocean through a water intake pipeline, and transfer the heat in the equipment to the seawater through a heat exchange device to achieve the purpose of cooling. After completing a heat exchange, the seawater is transported back to the sea through a drainage pipeline, thus forming a cycle and achieving the process of cooling the factory equipment. With the huge heat capacity and natural circulation of seawater, the entire system can effectively reduce the temperature of the equipment and ensure the normal operation of industrial equipment.

[0003] The commonly used seawater cooling system currently consists of two parts: the water intake pipeline and the drainage pipeline. The water intake pipeline usually extracts seawater from the ocean through a pump station and transports it to the heat exchange equipment to be cooled; the drainage pipeline discharges the seawater after heat exchange back to the ocean. The advantage of this system is that seawater as a cooling medium is widely available, low in cost, and has good thermal conductivity, which can effectively meet the needs of industrial cooling.

[0004] However, the traditional seawater cooling system is equipped with water intake and drainage pipelines. When the pipeline fails or needs regular maintenance and overhaul, the entire system usually needs to be stopped. This means that the water intake pipeline needs to stop pumping seawater, and the heat exchange equipment has to stop working, causing the entire cooling system to be interrupted. This shutdown maintenance not only affects the normal operation of the system, but also reduces the working efficiency of the entire seawater cooling system, and may even cause safety hazards such as overheating of the equipment and system overload. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing seawater cooling pipeline system, which requires shutdown operation when a failure occurs or maintenance is required, affecting the normal operation of the water intake system and causing low efficiency of the seawater cooling system, and to provide a seawater cooling pipeline system and a control method thereof.

[0006] In a first aspect, the present invention provides a seawater cooling pipeline system, comprising four pump outlet water intake pipelines, two water delivery pipelines, one spare pipeline, and two drainage pipelines;

[0007] The pump outlet water intake pipeline is connected to the water intake pump station; the pump outlet water intake pipeline is connected to one of the water delivery pipelines through the first pipeline, the pump outlet water intake pipeline is connected to the second pipeline through the water intake branch line, and the second pipeline is connected to another water delivery pipeline;

[0008] The pump outlet water intake pipeline is equipped with a first valve, and the water intake branch line is equipped with a second valve;

[0009] The seawater cooling pipeline system is provided with a user-side water supply switching system and a user-side drainage switching system near the user end, wherein the user-side water supply switching system is used to switch the connection between the water supply pipeline and the backup pipeline and the user-side water supply pipeline; the user-side drainage switching system is used to switch the connection between the drainage pipeline and the backup pipeline and the user-side drainage pipeline;

[0010] A pipeline switching system is arranged between the user-side water delivery switching system and the second pipeline, and the pipeline switching system is used to switch the connection between the water delivery pipeline and the backup pipeline.

[0011] The seawater cooling pipeline system provided by the present invention can freely control the opening and closing of the pump outlet water intake pipeline by setting the first valve and the second valve, so that the operator can flexibly adjust the flow direction and connection of the system. For example, when a water pump in the water intake pump station needs to be repaired or replaced, it is only necessary to close the corresponding first valve and the second valve to cut off the connection between the pump outlet water intake pipeline and the water delivery pipeline. When it is necessary to independently close a certain water delivery pipeline, it is only necessary to close all the first valves or all the second valves to realize the closing of the single water delivery pipeline, and it is not necessary to completely close the entire cooling system, thereby improving the operation efficiency of the pipeline system.

[0012] By setting up a pipeline switching system, the connection between the water pipeline and the backup pipeline can be easily achieved. When a water pipeline needs to be closed but the water flow rate is still maintained, only the corresponding water pipeline needs to be closed and the backup pipeline needs to be opened. At this time, the backup pipeline can be temporarily used as a water pipeline to achieve pipeline maintenance or replacement without reducing the cooling water supply, ensuring that the seawater cooling system can operate stably and safely, reducing downtime caused by faults; when the water intake of the water intake pump station needs to be increased, the backup pipeline can be temporarily opened as a water pipeline, that is, there are three water pipelines in the system at this time, increasing the water flow rate of the system;

[0013] By setting up a user-side water delivery switching system, the connection between the water delivery pipeline and the standby pipeline and the user-side water delivery pipeline can be switched freely, making it convenient for operators to choose whether to use the standby pipeline as a water delivery pipeline according to their needs, thus improving the flexibility of the system;

[0014] By setting up a user-side drainage switching system, the connection between the drainage pipeline and the backup pipeline and the user-side drainage pipeline can be switched freely. When a drainage pipeline needs to be closed but the drainage flow rate is still maintained, only the corresponding drainage pipeline needs to be closed and the backup pipeline needs to be opened. At this time, the backup pipeline can be temporarily used as a drainage pipeline to achieve pipeline maintenance or replacement without reducing the drainage volume of the system; when the drainage volume of the system needs to be increased, the backup pipeline can be temporarily opened as a drainage pipeline, that is, there are three drainage pipelines in the system at this time, increasing the drainage flow of the system.

[0015] The seawater cooling pipeline system provided by the present invention can temporarily serve as a water delivery pipeline or a drainage pipeline through a spare pipeline. When a pipeline fails or needs to be repaired, there is no need to shut down the system, and the normal operation of the water supply and drainage pipelines can be maintained, thereby improving the working efficiency and reliability of the entire seawater cooling system.

[0016] Preferably, the user-side water supply switching system includes a first conversion pipeline, each of the first conversion pipelines is provided with a third valve, each of the water supply pipelines and the backup pipeline is provided with a first conversion pipeline, each of the first conversion pipelines is connected to the user-side water supply pipeline, and the user-side water supply pipeline is used to provide seawater to the user.

[0017] With this setting, the operator can easily choose which water pipeline or spare pipeline to use to supply seawater to the user side by controlling the opening and closing of the third valve. When a water pipeline needs to be repaired or overhauled, the operator only needs to close the third valve of the corresponding water pipeline and open the third valve of the spare pipeline to connect the spare pipeline to the user side water pipeline as a temporary water transmission channel, ensuring the continuity of seawater transmission to the user side and reducing the risk of interruption caused by system shutdown and overhaul; when the system needs to increase the water supply, the third valve of the spare pipeline can be temporarily opened, so that the user side water pipeline receives seawater supply from the water pipeline and the spare pipeline to meet the peak load water supply demand. This flexible switching mechanism enables the system to quickly respond to different water demands on the user side, effectively improving the system's ability to adapt to diverse operating conditions.

[0018] Preferably, the user-side drainage switching system includes a second conversion pipeline, each of the second conversion pipelines is provided with a fourth valve, each of the drainage pipelines and the backup pipeline is provided with a second conversion pipeline, each of the second conversion pipelines is connected to the user-side drainage pipeline, and the user-side drainage pipeline is used to discharge seawater into the drainage pipeline.

[0019] With this setting, the operator can easily choose which drainage pipeline or spare pipeline to use to discharge the seawater after heat exchange by controlling the opening and closing of the fourth valve. When a drainage pipeline needs to be repaired, inspected or temporarily closed, the operator only needs to close the fourth valve on the corresponding drainage pipeline and open the fourth valve on the spare pipeline to temporarily use the spare pipeline as a drainage pipeline to ensure the continuity of system drainage; when the system needs to increase drainage capacity, the spare pipeline can be temporarily opened, so that the spare pipeline and the drainage pipeline can be drained together, increasing the drainage flow and alleviating the pressure of the drainage pipeline under high load conditions. This flexible adjustment method enables the system to quickly adapt to different drainage needs and ensure that the user side has sufficient drainage capacity under various conditions. This adjustability of the system enables it to respond more efficiently to seasonal or temporary load changes and improve the adaptability and reliability of overall operation.

[0020] Preferably, the pipeline switching system includes a third conversion pipeline, each of the third conversion pipelines is provided with a fifth valve, each of the water supply pipelines and the backup pipeline is provided with the third conversion pipeline, and the third conversion pipelines are connected to each other through the third pipeline; the pipeline switching system also includes a first valve well, in which a sixth valve and a seventh valve are provided, the sixth valve is installed on one of the water supply pipelines, and the seventh valve is installed on another of the water supply pipelines.

[0021] With this arrangement, the third conversion pipelines are connected to each other through the third pipeline, so that the spare pipeline can more effectively replace any water pipeline when needed, so that the operator can freely switch the water delivery path as needed. When a water pipeline needs to be repaired or inspected, it is only necessary to close the corresponding fifth valve and the sixth valve or the seventh valve on the water pipeline to be closed, and then open the fifth valve of the spare pipeline, so that the spare pipeline can temporarily replace the water pipeline, thereby avoiding the normal operation of the entire cooling system being affected by the deactivation of a single water pipeline. When the water delivery volume needs to be increased, the spare pipeline can be incorporated into the system as an auxiliary water pipeline to form a mode of three water pipelines to improve the water delivery capacity of the system. By adjusting the opening and closing states of the fifth valve, the sixth valve and the seventh valve, the operator can flexibly adjust the pipeline flow direction and flow distribution, thereby optimizing the system's operating efficiency under different load requirements and adapting to diverse working conditions.

[0022] Preferably, it also includes a second valve well, a first return pipeline and an eighth valve, one end of the first return pipeline is connected to the water intake pump station, the other end of the first return pipeline is connected to the water supply pipeline, the eighth valve is arranged on the water supply pipeline, the joint of the first pipeline and the water supply pipeline is located between the eighth valve and the first return pipeline; the joint of the second pipeline and the water supply pipeline is located between the eighth valve and the first return pipeline; the second valve well is located at the end of the first return pipeline away from the eighth valve, a ninth valve and a tenth valve are arranged in the second valve well, the ninth valve is installed on one of the first return pipelines, and the tenth valve is installed on another of the first return pipelines.

[0023] With this setting, when the water pipeline operates normally, the ninth and tenth valves are closed, and the eighth valve is opened, and the seawater is normally delivered to the user end. When the water intake pump station needs to shut down, the eighth valve can be closed, and the ninth and tenth valves can be opened. The accumulated water in the pipeline can flow back to the water intake pump station smoothly, preventing water accumulation in the pipeline, avoiding problems such as abnormal system pressure or pipeline corrosion caused by water stagnation in the pipeline, and extending the service life of the pipeline.

[0024] Preferably, it also includes a second reflux pipeline, one end of which is connected to the first reflux pipeline, and the other end of which is connected to a chlorine production station.

[0025] By adopting this arrangement, the utilization rate of seawater can be improved by setting up a second return pipeline. The seawater in the first return pipeline can be introduced into the chlorine production station through the second return pipeline to produce chlorine. The chlorine water produced by the chlorine production station is sent to the water intake head for seawater disinfection.

[0026] Preferably, the drainage pipeline and the backup pipeline are both connected to a drainage head, an eleventh valve is provided at the connection between the drainage pipeline and the drainage head, a twelfth valve is provided at the connection between the backup pipeline and the drainage head, and the liquid in the drainage pipeline and the backup pipeline is discharged into the ocean through the drainage head.

[0027] By controlling the eleventh and twelfth valves, operators can flexibly select the function of the standby pipeline. When the standby pipeline is used as a water delivery pipeline, the twelfth valve is closed so that the seawater in the standby pipeline is effectively delivered to the user end, ensuring a stable supply of cooling water; and when the standby pipeline needs to be converted into a drainage pipeline, the twelfth valve is opened to allow the seawater in the standby pipeline to be discharged into the ocean through the drainage head to meet the drainage needs.

[0028] Preferably, it also includes a HDPE pipeline, one end of which is connected to the water intake head, and the other end of which is connected to the water intake pump station.

[0029] Preferably, the number of the user-side water supply switching system and the number of the user-side drainage switching system are two each.

[0030] With this setup, the two user-side water supply switching systems and drainage switching systems enable the seawater cooling pipeline system to simultaneously meet the needs of seawater transportation and discharge for two user ends, effectively improving the system's utilization efficiency.

[0031] In a second aspect, the present invention provides a seawater cooling pipeline control method for controlling the above-mentioned seawater cooling pipeline system, comprising the following steps:

[0032] When both water pipelines are in operation, open the first valve, the second valve, the eighth valve, the sixth valve, the seventh valve, and the third valve corresponding to the water pipeline; close the ninth valve, the tenth valve, the fifth valve, and the third valve corresponding to the standby pipeline;

[0033] When both drainage lines are in operation, open the fourth valve corresponding to the drainage line, open the eleventh valve, close the fourth valve corresponding to the backup line, and close the twelfth valve;

[0034] When only one water pipeline is required to operate: close the second valve and open the first valve, or close the first valve and open the second valve;

[0035] When any pump outlet water intake pipeline needs to be closed, close the corresponding first valve and the second valve on the water intake branch line connected to the pump outlet water intake pipeline to be closed, and open the remaining first valves and second valves;

[0036] When the spare pipeline is needed as a water delivery pipeline, the twelfth valve is closed, and the fifth valve and the third valve corresponding to the spare pipeline are opened;

[0037] When a water pipeline needs to be closed and a spare pipeline is needed as the water pipeline, the twelfth valve is closed, the sixth valve or the seventh valve is closed, the fifth valve corresponding to the water pipeline to be closed is closed, and the remaining fifth valves are opened;

[0038] When it is necessary to close any water pipeline to supply water to the user end, close the third valve corresponding to the water pipeline to be closed;

[0039] When it is necessary to drain water using only one drainage pipeline, close the fourth valve corresponding to the drainage pipeline to be closed;

[0040] When the spare pipeline is needed as a drainage pipeline, the twelfth valve is opened, the third valve corresponding to the spare pipeline is closed, and the fourth valve corresponding to the spare pipeline is opened;

[0041] When it is necessary to stop the pump to discharge the accumulated water in the water pipeline, close the eighth valve and open the ninth and tenth valves;

[0042] When seawater needs to be input into the chlorine production station, the first valve and the second valve are opened, the eighth valve is closed, and the ninth valve and the tenth valve are closed.

[0043] The seawater cooling pipeline control method provided by the present invention can flexibly adjust the opening and closing states of each valve according to actual needs and adapt to different operating conditions. This flexibility ensures that the system can respond quickly according to different working scenarios and user needs, improving the overall operating efficiency; using this control method, when the system fails or the system needs to be repaired, it can quickly switch to the backup pipeline to ensure the continuity and stability of the system.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The seawater cooling pipeline system provided by the present invention can freely control the opening and closing of the pump outlet water intake pipeline by setting the first valve and the second valve, so that the operator can flexibly adjust the flow direction and connection of the system. For example, when a water pump in the water intake pump station needs to be repaired or replaced, it is only necessary to close the corresponding first valve and the second valve to cut off the connection between the pump outlet water intake pipeline and the water delivery pipeline. When it is necessary to independently close a certain water delivery pipeline, it is only necessary to close all the first valves or all the second valves to realize the closing of the single water delivery pipeline, without having to completely shut down the entire cooling system, thereby improving the operation efficiency of the pipeline system;

[0046] 2. The seawater cooling pipeline system provided by the present invention can conveniently realize the connection between the water pipeline and the spare pipeline by setting up a pipeline switching system. When it is necessary to close a certain water pipeline but still maintain the water flow rate, it is only necessary to close the corresponding water pipeline and open the spare pipeline. At this time, the spare pipeline can be temporarily used as the water pipeline, so that the pipeline can be repaired or replaced without reducing the cooling water supply, ensuring that the seawater cooling system can operate stably and safely, and reducing the downtime caused by faults; when it is necessary to increase the water intake of the water intake pump station, the spare pipeline can be temporarily opened as the water pipeline, that is, there are three water pipelines in the system at this time, increasing the water flow rate of the system; by setting up a user-side water supply switching system, it can The free switching of the connection between the water supply pipeline and the spare pipeline and the user-side water supply pipeline makes it convenient for the operator to choose whether to use the spare pipeline as the water supply pipeline according to the needs, thereby improving the flexibility of the system; by setting up the user-side drainage switching system, the connection between the drainage pipeline and the spare pipeline and the user-side drainage pipeline can be freely switched. When it is necessary to close a drainage pipeline but still maintain the drainage flow, it is only necessary to close the corresponding drainage pipeline and open the spare pipeline. At this time, the spare pipeline can be temporarily used as a drainage pipeline, so that the pipeline can be repaired or replaced without reducing the drainage volume of the system; when it is necessary to increase the drainage volume of the system, the spare pipeline can be temporarily opened as a drainage pipeline, that is, there are three drainage pipelines in the system at this time, increasing the drainage flow of the system;

[0047] 3. In the seawater cooling pipeline system provided by the present invention, the spare pipeline can temporarily serve as a water supply pipeline or a drainage pipeline. When a pipeline fails or needs maintenance, there is no need to shut down the machine, and the normal operation of the water supply and drainage pipelines can be maintained, thereby improving the working efficiency and reliability of the entire seawater cooling system.

[0048] 4. The seawater cooling pipeline control method provided by the present invention can flexibly adjust the opening and closing states of each valve according to actual needs and adapt to different operating conditions. This flexibility ensures that the system can respond quickly according to different working scenarios and user needs, improving the overall operating efficiency; using this control method, when the system fails or the system needs to be repaired, it can quickly switch to the backup pipeline to ensure the continuity and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of a seawater cooling pipeline system provided in Example 1;

[0050] Figure 2 for Figure 1 A magnified schematic diagram of the middle part;

[0051] Figure 3 for Figure 1 The enlarged schematic diagram of the middle B part;

[0052] Figure 4 for Figure 1 Enlarged schematic diagram of middle C part;

[0053] Figure 5 for Figure 1 The enlarged schematic diagram of the middle D part;

[0054] Figure 6 It is a partial elevation drawing of the connection between the pump outlet water intake pipeline and the water intake pump station;

[0055] Figure 7 This is a partial elevation view of the pipeline switching system.

[0056] Markings in the figure:

[0057] 1-pump outlet water intake pipeline, 11-first pipeline, 12-second pipeline, 13-water intake branch line, 2-water delivery pipeline, 3-spare pipeline, 4-drainage pipeline, 51-first valve, 52-second valve, 53-third valve, 54-fourth valve, 55-fifth valve, 56-sixth valve, 57-seventh valve, 58-eighth valve, 59-ninth valve, 510-tenth valve, 511-eleventh valve, 512 -The twelfth valve, 61-the first conversion pipeline, 62-the second conversion pipeline, 63-the third conversion pipeline, 64-the third pipeline, 71-the user-side water supply pipeline, 72-the user-side drainage pipeline, 81-the first valve well, 82-the second valve well, 91-the first return pipeline, 92-the second return pipeline, 101-HDPE pipeline, 100-water intake pump station, 200-chlorine production station, 300-drainage head, 400-water intake head. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0059] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0060] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0061] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0062] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0063] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0064] HDPE pipe is a pipe made of high-density polyethylene (English name: "High Density Polyethylene", abbreviated as "HDPE").

[0065] Example 1

[0066] This embodiment provides a seawater cooling pipeline system for taking seawater from the ocean and pumping it to the user end through a water intake pump station 100 for heat exchange and then transporting it back to the ocean, so as to overcome the problem that the existing seawater cooling pipeline system is difficult to switch and the maintenance causes the pump station to shut down and affect the cooling efficiency.

[0067] Specific as Figure 1-7As shown, this embodiment provides a seawater cooling pipeline system, which may include two HDPE pipelines 101, one end of each HDPE pipeline 101 is connected to a water intake head 400, and the other end of the HDPE pipeline 101 is connected to a water intake pump station 100. Seawater is pumped into the HDPE pipeline 101 through the water intake head 400 and then enters the water intake pump station 100. The seawater cooling pipeline system also includes four pump outlet water intake pipelines 1, two water delivery pipelines 2, a spare pipeline 3, and two drainage pipelines 4.

[0068] Specifically, Figure 1 , Figure 3 , Figure 6 As shown, one end of four pump outlet water intake pipelines 1 is connected to the water intake pump in the water intake pump station 100, and the other end of the pump outlet water intake pipeline 1 is connected to a water delivery pipeline 2 through a first pipeline 11. A water intake branch line 13 is arranged at the lower part of the pump outlet water intake pipeline 1. The pump outlet water intake pipeline 1 is connected to the second pipeline 12 through the water intake branch line 13, and the second pipeline 12 is connected to another water delivery pipeline 2. Each pump outlet water intake pipeline 1 is installed with a first valve 51, and each water intake branch line 13 is installed with a second valve 52.

[0069] The seawater cooling pipeline system is equipped with a user-side water supply switching system and a user-side drainage switching system near the user end. Figure 1 As shown, this embodiment shows the situation of setting up two sets of user-side water supply switching systems and two user-side drainage switching systems, that is, the seawater cooling pipeline system provided by this embodiment can simultaneously meet the needs of seawater transportation and discharge for two user ends, effectively improving the utilization efficiency of the system.

[0070] The user-side water supply switching system is used to switch the connection between the water supply pipeline 2 and the backup pipeline 3 and the user-side water supply pipeline 71. Specifically, Figure 1 , Figure 5 As shown, the user-side water supply switching system includes a first conversion pipeline 61, each first conversion pipeline 61 is provided with a third valve 53, and each water supply pipeline 2 and the backup pipeline 3 is provided with a first conversion pipeline 61, that is, three first conversion pipelines 61 are provided in the same user-side water supply switching system in this embodiment, and each first conversion pipeline 61 is connected to the user-side water supply pipeline 71, and the user-side water supply pipeline 71 is used to provide seawater to the user.

[0071] With this arrangement, the operator can conveniently select which water pipeline 2 or spare pipeline 3 to use to supply seawater to the user end by controlling the opening and closing of the third valve 53. Specifically, for example, when a water pipeline 2 needs to be repaired or overhauled, the operator only needs to close the third valve 53 of the corresponding water pipeline 2 and open the third valve 53 of the spare pipeline 3 (it can be understood that the spare pipeline 3 is already used as a water pipeline at this time), and then the spare pipeline 3 can be connected to the user-side water pipeline 71 as a temporary water transmission channel, thereby ensuring the continuity of seawater delivery to the user end and reducing the risk of interruption caused by system shutdown and overhaul.

[0072] Or when the system needs to increase the water supply, the third valve 53 of the backup pipeline 3 can be temporarily opened (it can be understood that the backup pipeline 3 is used as a water pipeline at this time), so that the user-side water pipeline 71 receives seawater supply from the water pipeline 2 and the backup pipeline 3 to meet the peak load water supply demand. This flexible switching mechanism enables the system to quickly respond to different water demands on the user side, effectively improving the system's ability to adapt to diverse operating conditions.

[0073] The user-side drainage switching system is used to switch the connection between the drainage pipeline 4 and the backup pipeline 3 and the user-side drainage pipeline 72. Figure 1 , Figure 5 As shown, the user-side drainage switching system includes a second conversion pipeline 62, each second conversion pipeline 62 is provided with a fourth valve 54, and each drainage pipeline 4 and the backup pipeline 3 is provided with a second conversion pipeline 62, that is, in this embodiment, a total of three second conversion pipelines 62 are provided in the same user-side drainage switching system, and each second conversion pipeline 62 is connected to the user-side drainage pipeline 72, and the user-side drainage pipeline 72 is used to discharge seawater to the drainage pipeline 4.

[0074] With this arrangement, the operator can conveniently select which drainage pipeline 4 or spare pipeline 3 to use to discharge the seawater after heat exchange by controlling the opening and closing of the fourth valve 54. Specifically, for example, when a drainage pipeline 4 needs to be repaired, inspected or temporarily closed, the operator only needs to close the fourth valve 54 on the corresponding drainage pipeline 4 and open the fourth valve 54 on the spare pipeline 3 (it can be understood that the spare pipeline 3 is already used as a drainage pipeline at this time), and the spare pipeline 3 can be temporarily used as a drainage pipeline to ensure the continuity of system drainage.

[0075] Or when the system needs to increase drainage capacity, the fourth valve 54 corresponding to the backup pipeline 3 can be temporarily opened (it can be understood that the backup pipeline 3 is already used as a drainage pipeline at this time), so that the backup pipeline 3 and the drainage pipeline 4 can drain together, increase the drainage flow, and relieve the pressure of the drainage pipeline 4 under high load conditions. This flexible adjustment method enables the system to quickly adapt to different drainage needs and ensure that the user side has sufficient drainage capacity under various conditions. This adjustability of the system enables it to more efficiently respond to seasonal or temporary load changes and improve the adaptability and reliability of the overall operation.

[0076] A pipeline switching system is provided between the user-side water delivery switching system and the second pipeline 12, and the pipeline switching system is used to switch the connection between the water delivery pipeline 2 and the backup pipeline 3. Specifically, Figure 1 , Figure 4 , Figure 7 As shown, the pipeline switching system includes a third conversion pipeline 63, each third conversion pipeline 63 is provided with a fifth valve 55, and each water pipeline 2 and the backup pipeline 3 is provided with a third conversion pipeline 63, that is, three third conversion pipelines 63 are provided in this embodiment, and the third conversion pipelines 63 are connected to each other through the third pipeline 64; the pipeline switching system also includes a first valve well 81, and a sixth valve 56 and a seventh valve 57 are provided in the first valve well 81. The sixth valve 56 is installed on one water pipeline 2, and the seventh valve 57 is installed on another water pipeline 2. It can be understood that the installation positions of the sixth valve 56 and the seventh valve 57 can be interchanged.

[0077] With this arrangement, the third conversion pipelines 63 are connected to each other through the third pipeline 64, so that the backup pipeline 3 can more effectively replace any water pipeline 2 when needed, so that the operator can freely switch the water delivery path as needed. For example, when a water pipeline 2 needs to be repaired or inspected, it is only necessary to open the fifth valve 55 on the third conversion pipeline 63 connected to the water pipeline 2 to be closed, close the sixth valve 56 or the seventh valve 57 on the water pipeline 2 to be closed, and then open the fifth valve 55 of the backup pipeline 3, so that the water pipeline 2 can be temporarily replaced by the backup pipeline 3, thereby avoiding affecting the normal operation of the entire cooling system due to the deactivation of a single water pipeline 2.

[0078] When the water delivery volume needs to be increased, the spare pipeline 3 can be incorporated into the system as an auxiliary water delivery pipeline 2 to form a mode of three water delivery pipelines 2 to improve the water delivery capacity of the system. By adjusting the opening and closing states of the fifth valve 55, the sixth valve 56 and the seventh valve 57, the operator can flexibly adjust the pipeline flow direction and flow distribution, thereby optimizing the operating efficiency of the system under different load requirements and adapting to diverse working conditions.

[0079] Further, such as Figure 1 , Figure 3, Figure 2 As shown, the seawater cooling pipeline system provided in this embodiment also includes a second valve well 82, a first return pipeline 91 and an eighth valve 58. One end of the first return pipeline 91 is connected to the water intake pump station 100, and the other end of the first return pipeline 91 is connected to the water delivery pipeline 2. For example, Figure 1 The number of the first return pipelines 91 shown is the same as the number of the water supply pipelines 2, that is, two. The two first return pipelines 91 are merged into one at one end away from the water supply pipeline 2 and then flow back into the water intake pump station 100. It can be understood that the two first return pipelines 91 can also flow back into the water intake pump station 100 separately.

[0080] The eighth valve 58 is provided on the water delivery pipeline 2, and the joint between the first pipeline 11 and the water delivery pipeline 2 is located between the eighth valve 58 and the first return pipeline 91; the joint between the second pipeline 12 and the water delivery pipeline 2 is located between the eighth valve 58 and the first return pipeline 91. Specifically, for example, the first pipeline 11 and the second pipeline 12 are both connected to the water delivery pipeline 2 through a three-way pipeline, the eighth valve 58 can be installed on the right side of the three-way pipeline, and the first return pipeline 91 can be installed on the left side of the three-way pipeline.

[0081] The second valve well 82 is located at one end of the first return pipeline 91 away from the eighth valve 58. The ninth valve 59 and the tenth valve 510 are arranged in the second valve well 82. The ninth valve 59 is installed on one first return pipeline 91, and the tenth valve 510 is installed on another first return pipeline 91. It can be understood that the installation positions of the ninth valve 59 and the tenth valve 510 can be interchanged.

[0082] With this arrangement, when the water delivery pipeline 2 operates normally, the ninth valve 59 and the tenth valve 510 are closed, and the eighth valve 58 is opened, and the seawater is normally delivered to the user end. When the water intake pump station 100 needs to be shut down, the eighth valve 58 can be closed, and the ninth valve 59 and the tenth valve 510 can be opened, and the accumulated water in the pipeline can smoothly flow back to the water intake pump station 100, preventing water accumulation in the pipeline, avoiding problems such as abnormal system pressure or pipeline corrosion caused by water flow being retained in the pipeline, and extending the service life of the pipeline.

[0083] Furthermore, the seawater cooling pipeline system provided in this embodiment further includes a second return pipeline 92, specifically as follows Figure 1 , Figure 2 As shown, one end of the second return pipeline 92 is connected to the first return pipeline 91, and the other end of the second return pipeline 92 is connected to the chlorine production station 200. The second return pipeline 92 can improve the utilization rate of seawater. The seawater in the first return pipeline 91 can be introduced into the chlorine production station 200 for chlorine production through the second return pipeline 92, and the chlorine water produced by the chlorine production station 200 is sent to the water intake head 400 for seawater disinfection.

[0084] Further, such as Figure 1 As shown, the drainage pipeline 4 and the backup pipeline 3 are both connected to the drainage head 300, and the eleventh valve 511 is set at the connection between the drainage pipeline 4 and the drainage head 300, and the twelfth valve 512 is set at the connection between the backup pipeline 3 and the drainage head 300. The liquid in the drainage pipeline 4 and the backup pipeline 3 is discharged into the ocean through the drainage head 300. By controlling the eleventh valve 511 and the twelfth valve 512, the operator can flexibly select the function of the backup pipeline 3. For example, when the backup pipeline 3 is used as the water delivery pipeline 2, the twelfth valve 512 is closed at this time, and the seawater in the backup pipeline 3 can only flow toward the user end, so that the seawater in the backup pipeline 3 is effectively transported to the user end, ensuring a stable supply of cooling water; and when it is necessary to convert the backup pipeline 3 into the drainage pipeline 4, the twelfth valve 512 is opened to allow the seawater in the backup pipeline 3 to be discharged into the ocean through the drainage head 300 to meet the drainage demand.

[0085] The seawater cooling pipeline system provided in this embodiment can freely control the opening and closing of the pump outlet water intake pipeline 1 by setting the first valve 51 and the second valve 52, so that the operator can flexibly adjust the flow direction and connection of the system. For example, when a water pump in the water intake pump station 100 needs to be repaired or replaced, it is only necessary to close the corresponding first valve 51 and the second valve 52 to cut off the connection between the pump outlet water intake pipeline 1 and the water delivery pipeline 2. When it is necessary to independently close a certain water delivery pipeline 2, it is only necessary to close all the first valves 51 or all the second valves 52 to achieve the closure of the single water delivery pipeline 2, without having to completely shut down the entire cooling system, thereby improving the operation efficiency of the pipeline system;

[0086] By setting up a pipeline switching system, the connection between the water pipeline 2 and the backup pipeline 3 can be easily realized. When it is necessary to close a certain water pipeline 2 but still maintain the water flow rate, it is only necessary to close the corresponding water pipeline 2 and open the backup pipeline 3. At this time, the backup pipeline 3 can be temporarily used as the water pipeline 2, so that the pipeline can be repaired or replaced without reducing the cooling water supply, ensuring that the seawater cooling system can operate stably and safely, and reducing the downtime caused by faults; when it is necessary to increase the water flow of the system, the backup pipeline 3 can be temporarily opened as the water pipeline, that is, there are three water pipelines in the system at this time, increasing the water flow of the system;

[0087] By setting up a user-side water delivery switching system, the connection between the water delivery pipeline 2 and the backup pipeline 3 and the user-side water delivery pipeline 71 can be switched freely, so that the operator can choose whether to use the backup pipeline 3 as the water delivery pipeline according to the needs, thereby improving the flexibility of the system;

[0088] By setting up a user-side drainage switching system, the connection between the drainage pipeline 4 and the backup pipeline 3 and the user-side drainage pipeline 72 can be switched freely. When a drainage pipeline 4 needs to be closed but the drainage flow rate still needs to be maintained, only the corresponding drainage pipeline 4 needs to be closed and the backup pipeline 3 needs to be opened. At this time, the backup pipeline 3 can be temporarily used as a drainage pipeline to achieve pipeline maintenance or replacement without reducing the drainage volume of the system; when the drainage volume of the system needs to be increased, the backup pipeline 3 can be temporarily opened as a drainage pipeline, that is, there are three drainage pipelines in the system at this time, increasing the drainage flow rate of the system.

[0089] In the seawater cooling pipeline system provided by the present invention, the spare pipeline 3 can temporarily serve as the water delivery pipeline 2 or the drainage pipeline 4. When a pipeline failure occurs or maintenance is required, there is no need to shut down the machine, and the normal operation of the water intake and discharge pipeline 4 can be maintained, thereby improving the working efficiency and reliability of the entire seawater cooling system.

[0090] Example 2

[0091] This embodiment provides a seawater cooling pipeline control method, which is used to control the seawater cooling pipeline system provided in Embodiment 1, and includes the following steps:

[0092] When both water pipelines 2 are operating normally, there is no need to switch the pipelines. You can open the first valve 51, the second valve 52, the eighth valve 58, the sixth valve 56, the seventh valve 57, and the third valve 53 corresponding to the water pipeline 2; close the ninth valve 59, the tenth valve 510, the fifth valve 55, and close the third valve 53 corresponding to the backup pipeline 3. At this time, the flow direction of seawater is: water intake head 400 → HDPE pipeline 101 → water intake pump station 100 → pump outlet water intake pipeline 1 → first pipeline 11 and water intake branch line 13, second pipeline 12 → water intake pipeline 2 → first conversion pipeline 61 → user-side water pipeline 71 → user end.

[0093] When both drainage pipelines 4 operate normally, there is no need to switch the pipelines. The fourth valve 54 corresponding to the drainage pipeline 4 can be opened, the eleventh valve 511 can be opened, the fourth valve 54 corresponding to the backup pipeline 3 can be closed, and the twelfth valve 512 can be closed. At this time, the flow direction of seawater is: user end → user side drainage pipeline 72 → second conversion pipeline 62 → drainage pipeline 4 → drainage head 300.

[0094] When only one water pipeline 2 is needed for operation: the second valve 52 can be closed and the first valve 51 can be opened on the basis of the normal operation of the two water pipelines 2. At this time, the seawater enters the first pipeline 11 through the pump outlet water intake pipeline 1 and then flows into one water pipeline 2; or the first valve 51 is closed and the second valve 52 is opened. At this time, the seawater enters the water intake branch line 13 through the pump outlet water intake pipeline 1 and then flows into the second pipeline 12, and then flows into the other water pipeline 2.

[0095] When it is necessary to close any one of the pump outlet water intake pipelines 1, the first valve 51 corresponding to the pump outlet water intake pipeline 1 to be closed and the second valve 52 on the water intake branch line 13 connected to the pump outlet water intake pipeline 1 to be closed can be closed on the basis of the normal operation of the two water supply pipelines 2, and the remaining first valves 51 and second valves 52 can be opened; at this time, seawater does not flow into the water supply pipeline 2 through the closed pump outlet water intake pipeline 1.

[0096] When the backup pipeline 3 is needed as a water pipeline, the twelfth valve 512 can be closed on the basis of the normal operation of the two water pipelines 2, and the fifth valve 55 and the third valve 53 corresponding to the backup pipeline 3 can be opened. At this time, the seawater in the two water pipelines 2 can enter the third pipeline 64 through the third conversion pipeline 63, and then enter the backup pipeline 3 through the third pipeline 64. Since the twelfth valve 512 is closed at this time, the seawater in the backup pipeline 3 can only flow toward the user end.

[0097] When one water pipeline 2 needs to be closed and the backup pipeline 3 is needed as the water pipeline, the twelfth valve 512 can be closed on the basis of the normal operation of the two water pipelines 2, the sixth valve 56 or the seventh valve 57 can be closed, the fifth valve 55 corresponding to the water pipeline 2 to be closed can be closed, and the remaining fifth valves 55 can be opened;

[0098] Specific Figure 1 Take the water pipeline 2 where the seventh valve 57 needs to be closed as an example. At this time, the seventh valve 57 is closed, and the seawater cannot continue to flow along the water pipeline 2. It can only flow into the third pipeline 64 along the third conversion pipeline 63 and then enter the backup pipeline 3. At this time, the water pipeline 2 after the seventh valve 57 along the seawater flow direction can be separated from the system for maintenance. It can be understood that when the water pipeline 2 after the seventh valve 57 and the sixth valve 56 need to be separated from the system for maintenance, the seventh valve 57 and the sixth valve 56 can be closed. At this time, the backup pipeline 3 temporarily serves as the water pipeline for water delivery.

[0099] When it is necessary to close any one of the water pipelines 2 to supply water to the user end, the third valve 53 corresponding to the water pipeline 2 to be closed can be closed on the basis of the normal operation of the two water pipelines 2; at this time, since the third valve 53 on the first conversion pipeline 61 connected to one water pipeline 2 is closed, seawater can only be supplied to the user end from the other water pipeline 2.

[0100] When it is necessary to drain water using only one drainage pipeline 4, the fourth valve 54 corresponding to the drainage pipeline 4 to be closed can be closed on the basis that both drainage pipelines 4 are operating normally; at this time, since the fourth valve 54 on the second conversion pipeline 62 connected to one drainage pipeline 4 is closed, seawater can only be discharged to the ocean from the other drainage pipeline 4, and the closed drainage pipeline 4 can be inspected and repaired at this time.

[0101] When the backup pipeline 3 is needed as a drainage pipeline, the twelfth valve 512 can be opened on the basis that both drainage pipelines 4 are operating normally, the third valve 53 corresponding to the backup pipeline 3 is closed, and the fourth valve 54 corresponding to the backup pipeline 3 is opened; at this time, seawater enters the backup pipeline 3 through the fourth valve 54, and the seawater in the backup pipeline 3 flows into the drainage head 300 through the twelfth valve 512 and is discharged into the ocean.

[0102] It can be understood that when both drainage pipelines 4 need to be closed, the fourth valve 54 corresponding to the drainage pipeline 4 can be closed. When the above-mentioned backup pipeline 3 is used as the control method for the drainage pipeline, pipeline maintenance can be carried out without affecting drainage.

[0103] When it is necessary to stop the pump to discharge the accumulated water in the water pipeline 2, the eighth valve 58 can be closed and the ninth valve 59 and the tenth valve 510 can be opened on the basis of the normal operation of the two water pipelines 2; at this time, since the eighth valve 58 is closed, the seawater can only flow back to the water intake pump station 100 along the first return pipeline 91 after passing through the first pipeline 11 and the second pipeline 12.

[0104] When it is necessary to input seawater into the chlorine production station 200, the eighth valve 58, the ninth valve 59 and the tenth valve 510 can be closed on the basis of the normal operation of the two water delivery pipelines 2. At this time, since the eighth valve 58 is closed, the seawater can only flow back along the first return pipeline 91 after passing through the first pipeline 11 and the second pipeline 12, but at this time, the ninth valve 59 and the tenth valve 510 are both closed, and the seawater in the first return pipeline 91 can only flow back into the chlorine production station 200 along the second return pipeline 92.

[0105] The seawater cooling pipeline control method provided in this embodiment can flexibly adjust the opening and closing states of each valve according to actual needs to adapt to different operating conditions. This flexibility ensures that the system can respond quickly according to different working scenarios and user needs, improving the overall operating efficiency; using this control method, it can quickly switch to the backup pipeline 3 when the system fails or the system needs to be repaired, ensuring the continuity and stability of the system. The control method also provides a special step to deal with the problem of water accumulation in the water delivery pipeline 2. By opening the relevant valves in time, the accumulated water can be smoothly refluxed to prevent corrosion and other potential problems caused by water accumulation in the pipeline.

[0106] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seawater cooling pipeline system, characterized in that: It includes four pump outlet water intake pipelines (1), two water delivery pipelines (2), one spare pipeline (3), and two drainage pipelines (4); The pump outlet water intake pipeline (1) is connected to the water intake pump station (100); the pump outlet water intake pipeline (1) is connected to one of the water delivery pipelines (2) via a first pipeline (11); the pump outlet water intake pipeline (1) is connected to a second pipeline (12) via a water intake branch line (13); the second pipeline (12) is connected to another of the water delivery pipelines (2); The pump outlet water intake pipeline (1) is equipped with a first valve (51), and the water intake branch line (13) is equipped with a second valve (52); The seawater cooling pipeline system is provided with a user-side water supply switching system and a user-side drainage switching system near the user end, wherein the user-side water supply switching system is used to switch the connection between the water supply pipeline (2) and the backup pipeline (3) and the user-side water supply pipeline (71); and the user-side drainage switching system is used to switch the connection between the drainage pipeline (4) and the backup pipeline (3) and the user-side drainage pipeline (72); A pipeline switching system is provided between the user-side water delivery switching system and the second pipeline (12), and the pipeline switching system is used to switch the connection between the water delivery pipeline (2) and the backup pipeline (3).

2. A seawater cooling pipeline system according to claim 1, characterized in that: The user-side water supply switching system comprises a first conversion pipeline (61), each of the first conversion pipelines (61) is provided with a third valve (53), each of the water supply pipelines (2) and the backup pipeline (3) is provided with a first conversion pipeline (61), each of the first conversion pipelines (61) is connected to a user-side water supply pipeline (71), and the user-side water supply pipeline (71) is used to provide seawater to a user.

3. A seawater cooling pipeline system according to claim 2, characterized in that: The user-side drainage switching system comprises a second conversion pipeline (62), each of the second conversion pipelines (62) is provided with a fourth valve (54), each of the drainage pipelines (4) and the backup pipeline (3) is provided with a second conversion pipeline (62), each of the second conversion pipelines (62) is connected to a user-side drainage pipeline (72), and the user-side drainage pipeline (72) is used to discharge seawater to the drainage pipeline (4).

4. A seawater cooling pipeline system according to claim 3, characterized in that: The pipeline switching system comprises a third conversion pipeline (63), each of the third conversion pipelines (63) is provided with a fifth valve (55), each of the water delivery pipelines (2) and the backup pipeline (3) is provided with the third conversion pipeline (63), and the third conversion pipelines (63) are connected to each other through a third pipeline (64); The pipeline switching system further comprises a first valve well (81), in which a sixth valve (56) and a seventh valve (57) are arranged, the sixth valve (56) being installed on one of the water pipelines (2), and the seventh valve (57) being installed on another of the water pipelines (2).

5. A seawater cooling pipeline system according to claim 4, characterized in that: It also comprises a second valve well (82), a first return pipeline (91) and an eighth valve (58), one end of the first return pipeline (91) is connected to the water intake pump station (100), the other end of the first return pipeline (91) is connected to the water delivery pipeline (2), the eighth valve (58) is arranged on the water delivery pipeline (2), the joint between the first pipeline (11) and the water delivery pipeline (2) is located between the eighth valve (58) and the first return pipeline (91); the joint between the second pipeline (12) and the water delivery pipeline (2) is located between the eighth valve (58) and the first return pipeline (91); The second valve well (82) is located at one end of the first return pipeline (91) away from the eighth valve (58), and a ninth valve (59) and a tenth valve (510) are arranged in the second valve well (82). The ninth valve (59) is installed on one of the first return pipelines (91), and the tenth valve (510) is installed on another of the first return pipelines (91).

6. A seawater cooling pipeline system according to claim 5, characterized in that: It also includes a second return pipeline (92), one end of which is connected to the first return pipeline (91), and the other end of which is connected to the chlorine production station (200).

7. A seawater cooling pipeline system according to claim 6, characterized in that: The drainage pipeline (4) and the backup pipeline (3) are both connected to the drainage head (300). An eleventh valve (511) is provided at the connection between the drainage pipeline (4) and the drainage head (300). A twelfth valve (512) is provided at the connection between the backup pipeline (3) and the drainage head (300). The liquid in the drainage pipeline (4) and the backup pipeline (3) is discharged into the ocean through the drainage head (300).

8. A seawater cooling pipeline system according to claim 1, characterized in that: It also includes a HDPE pipeline (101), one end of which is connected to the water intake head (400), and the other end of which is connected to the water intake pump station (100).

9. A seawater cooling pipeline system according to claim 1, characterized in that: The number of the user-side water supply switching system and the number of the user-side drainage switching system are two each.

10. A seawater cooling pipeline control method, characterized in that: Used to control the seawater cooling pipeline system according to claim 8, comprising the following steps: When both water pipelines (2) are in operation, the first valve (51), the second valve (52), the eighth valve (58), the sixth valve (56), the seventh valve (57), and the third valve (53) corresponding to the water pipeline (2) are opened; the ninth valve (59), the tenth valve (510), the fifth valve (55) are closed, and the third valve (53) corresponding to the standby pipeline (3) is closed; When both drainage pipelines (4) are in operation, the fourth valve (54) corresponding to the drainage pipeline (4) is opened, the eleventh valve (511) is opened, the fourth valve (54) corresponding to the backup pipeline (3) is closed, and the twelfth valve (512) is closed; When only one water pipeline (2) is required to operate: close the second valve (52) and open the first valve (51), or close the first valve (51) and open the second valve (52); When it is necessary to close any one of the pump outlet water intake pipelines (1), close the corresponding first valve (51) and the second valve (52) on the water intake branch line (13) connected to the pump outlet water intake pipeline (1) to be closed, and open the remaining first valves (51) and second valves (52); When the spare pipeline (3) is needed as a water delivery pipeline, the twelfth valve (512) is closed, and the fifth valve (55) and the third valve (53) corresponding to the spare pipeline (3) are opened; When a water pipeline (2) needs to be closed and a spare pipeline (3) is needed as the water pipeline, the twelfth valve (512) is closed, the sixth valve (56) or the seventh valve (57) is closed, the fifth valve (55) corresponding to the water pipeline (2) to be closed is closed, and the remaining fifth valves (55) are opened; When it is necessary to close any water delivery pipeline (2) to deliver water to the user end, close the third valve (53) corresponding to the water delivery pipeline (2) to be closed; When it is necessary to drain water using only one drainage pipeline (4), closing the fourth valve (54) corresponding to the drainage pipeline (4) to be closed; When the spare pipeline (3) is needed as a drainage pipeline, the twelfth valve (512) is opened, the third valve (53) corresponding to the spare pipeline (3) is closed, and the fourth valve (54) corresponding to the spare pipeline (3) is opened; When it is necessary to stop the pump to drain the accumulated water in the water delivery pipeline (2), close the eighth valve (58) and open the ninth valve (59) and the tenth valve (510); When seawater needs to be input into the chlorine production station (200), the first valve (51) and the second valve (52) are opened, the eighth valve (58) is closed, and the ninth valve (59) and the tenth valve (510) are closed.

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