A submarine cable landing section current sharing water droplet cooling device

Abstract

The application provides a submarine cable landing section current sharing and water dripping cooling device, which comprises a water storage pool, a water supply pipe and a water return pipe; the end of the water supply pipe and the end of the water return pipe are connected with the water storage pool; at least one drip irrigation water pipe branch is arranged in parallel between the water supply pipe and the water return pipe; the water inlet of each drip irrigation water pipe branch is connected with the water supply pipe, and the water outlet of each drip irrigation water pipe branch is connected with the water return pipe. Water is supplied to the drip irrigation water pipe branch through the water supply pipe, and then the water is dripped to the outer surface of the submarine cable of the landing section to be cooled through the drip irrigation water pipe branch; the drip irrigation technology can save the water consumption of the device, and the cooling effect of the water flow is fully utilized to cool the surface of the submarine cable of the landing section to be cooled, which is beneficial to the heat dissipation of the conductor of the submarine cable line landing section, thereby improving the current carrying capacity of the submarine cable landing section and increasing the actual transmission capacity of the submarine cable.

Description

Technical Field

[0001] This invention relates to the field of submarine power cable operation and maintenance technology, and more specifically, to a drip cooling device for the landing section of a submarine cable. Background Technology

[0002] Offshore wind power and other renewable energy sources rely on submarine cables to transmit power to land. However, the heat dissipation conditions of submarine cables after landing are far worse than on the seabed. The soil at the landing section has poor thermal conductivity, and the losses in the armor and metal sheath are greater than in the submarine section. The allowable current-carrying capacity of submarine cables at the landing section is generally only 60% to 70% of that at the submarine section. Therefore, submarine cables are constrained by the current-carrying capacity bottleneck at the landing section, operating for extended periods below the designed current-carrying capacity of the cable conductors, failing to fully utilize the current-carrying capacity of submarine cables, and resulting in resource waste. Simply increasing the cross-sectional area of ​​the submarine cable conductor to increase the current-carrying capacity would significantly increase the investment in the cable line, increase engineering costs, and similarly lead to substantial resource waste.

[0003] Currently, there are two ways to increase the current carrying capacity of submarine cable landing sections: reducing losses in the landing sections and improving heat dissipation conditions in the landing sections.

[0004] One method to reduce losses in the landing section of submarine cables is to use non-magnetic (copper or aluminum) armor, a mixed armor structure of non-magnetic metal wires (copper or aluminum) and steel wires, series resistance in the lead-sheathed armor circuit, and to change the lead sheath interconnection grounding to reduce the loss of the metal armor. However, the effect is not significant enough. On the other hand, using the method of stripping the metal armor to reduce the power loss of submarine cables of different voltage levels is a way to reduce the possibility of damage to the remaining parts of the submarine cable by damaging the cable structure. The operation of the submarine cable with hidden dangers reduces the reliability of the cable line.

[0005] The main methods to improve the heat dissipation conditions of the landing section include indirect cooling by laying cooling water pipes for submarine cables, backfilling with special soil, and filling the cable trench with water. These methods improve the heat dissipation conditions of the medium around the landing section of the cable without changing the structure of the submarine cable and the landing section, thereby alleviating the temperature rise effect of the cable in the landing section and increasing the current carrying capacity of the submarine cable. However, the existing methods to improve the heat dissipation conditions of the landing section are not effective enough and are not easy to adjust. Summary of the Invention

[0006] In view of this, the present invention proposes a drip cooling device for the landing section of submarine cables, which aims to solve the problems that the existing methods for reducing losses in the landing section of submarine cables are not effective enough and are not easy to adjust.

[0007] This invention proposes a drip cooling device for the landing section of a submarine cable. The device includes a water storage tank, a water supply pipe, and a return water pipe. The ends of both the water supply pipe and the return water pipe are connected to the water storage tank. At least one parallel drip irrigation branch is provided between the water supply pipe and the return water pipe. The inlet of each drip irrigation branch is connected to the water supply pipe, and the outlet of each drip irrigation branch is connected to the return water pipe. This device transports water from the water supply pipe to the drip irrigation branch and drips it onto the outer surface of the landing section of the submarine cable to be cooled, thereby cooling the cable. The remaining water in the drip irrigation branch is then circulated back to the water storage tank via the return water pipe.

[0008] Furthermore, the aforementioned submarine cable landing section is equipped with a drip irrigation cooling device, wherein the drip irrigation pipe branch includes: a water supply section, the inlet of which is connected to the water supply pipe; a water outlet section, the outlet of which is connected to the return water pipe; and a winding section, which is located between the water supply section and the water outlet section and has a serpentine structure, for winding around the submarine cable landing section to be cooled, so as to cool the submarine cable landing section to be cooled by dripping water.

[0009] Furthermore, the aforementioned submarine cable landing section is equipped with a drip cooling device, and the winding section is provided with a water outlet for dripping water.

[0010] Furthermore, the aforementioned submarine cable landing section is equipped with a drip irrigation cooling device, and each of the drip irrigation pipe branches is equipped with a pressure-stabilizing water valve to regulate the water flow rate within the drip irrigation pipe branch.

[0011] Furthermore, the aforementioned submarine cable landing section is equipped with a drip irrigation cooling device, and the water supply pipe is equipped with a main water pump, which is used to pump water from the water storage tank into the water supply pipe and deliver it to the drip irrigation branch.

[0012] Furthermore, in the aforementioned submarine cable landing section drip cooling device, the outlet pressure of the main water pump is greater than the sum of the pressure setting values ​​of the pressure stabilizing valves on each of the drip irrigation pipe branches.

[0013] Furthermore, the aforementioned submarine cable landing section is equipped with a drip cooling device, wherein the return water pipe is equipped with a flow-aiding water pump, and the flow-aiding water pump is multiple and arranged side by side along the length of the return water pipe.

[0014] Furthermore, the aforementioned submarine cable landing section is equipped with a drip cooling device, the water storage tank is connected to a water supply pipe, and the water supply pipe is equipped with a water pump for pumping water from the well into the water storage tank.

[0015] Furthermore, the aforementioned submarine cable landing section uniform drip cooling device further includes: a temperature-measuring optical fiber for real-time acquisition of the outer surface temperature of the landing section of the submarine cable to be cooled; and a controller electrically connected to the temperature-measuring optical fiber for acquiring the outer surface temperature of the landing section of the submarine cable to be cooled and adjusting the water flow rate of each drip irrigation pipe branch based on the outer surface temperature of the landing section of the submarine cable to be cooled, thereby adjusting the drip volume of each drip irrigation pipe branch.

[0016] Furthermore, in the aforementioned submarine cable landing section, the diameter and length of each drip irrigation pipe branch are equal.

[0017] The submarine cable landing section equalization drip cooling device provided by this invention, through the setting of a water storage tank, a water supply pipe, a return water pipe, and drip irrigation pipe branches, supplies water to the drip irrigation pipe branches through the water supply pipe, so that water droplets are dripped onto the outer surface of the submarine cable landing section to be cooled, thereby cooling the surface of the submarine cable landing section and facilitating heat dissipation of the conductors of the operating submarine cable landing section, thereby increasing the current carrying capacity of the submarine cable landing section and increasing the actual transmission capacity of the submarine cable; the remaining water in the drip irrigation pipe branches flows back to the return water pipe, and then circulates back to the water storage tank through the return water pipe, completing the drip cooling process of the submarine cable landing section to be cooled, and also ensuring the recycling and full utilization of water resources; the drip volume of the drip irrigation pipe branches can be adjusted by adjusting the water flow rate of the drip irrigation pipe branches to regulate the cooling effect of the submarine cable landing section to be cooled, solving the problems that the existing methods for reducing submarine cable landing section losses are not significant enough and are not easy to adjust; at the same time, this device also has the following technical effects:

[0018] First, the device forms a dynamic loop of cooling water flow through the main water pump, main outlet pipe, pressure stabilizing valve, drip irrigation branch pipes, auxiliary flow pump, main return pipe, and storage tank. The pressure stabilizing valve and drip irrigation branch pipes with equal diameter and length ensure that the water output of each drip irrigation branch pipe is the same per unit time, resulting in a consistent axial cooling effect on the submarine cable landing section. This makes the device for uniform drip cooling of the submarine cable landing section water-saving and consistent cooling effect on the submarine cable landing section.

[0019] Secondly, using drip irrigation technology can save water consumption and make full use of the cooling effect of water flow;

[0020] Third, due to the varying heights of the submarine cable landing sections, the remaining water flow in the drip irrigation pipe branches may lack sufficient power to flow back to the storage tank. The pressurization effect of the auxiliary water pump can ensure that the remaining water flow is recycled to the storage tank, so that the water flow is circulated and fully utilized, thus saving water resources.

[0021] Fourth, by calculating the inverse relationship between the surface temperature of the submarine cable and the conductor temperature, in addition to obtaining the effect of the key drip cooling device, it can also provide a reference for adjusting the pressure and flow parameters of the pressure stabilizing valves in each drip irrigation pipe branch. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of the submarine cable landing section equalization drip cooling device provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a drip irrigation pipe branch provided in an embodiment of the present invention. Detailed Implementation

[0025] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] See Figure 1 This is a schematic diagram of the structure of the submarine cable landing section equalization drip cooling device provided in an embodiment of the present invention. As shown in the figure, the device includes: a water storage tank 1, a water supply pipe 2, a return water pipe 3, a temperature measuring optical fiber 4, and a controller (not shown in the figure); wherein,

[0027] The ends of the water supply pipe 2 and the return pipe 3 (e.g.) Figure 1 The left end shown is connected to the water storage tank 1, and at least one parallel drip irrigation pipe branch 5 is provided between the water supply pipe 2 and the return pipe 3; the inlet of each drip irrigation pipe branch 5 (e.g., the left end shown) is connected to the water storage tank 1, and at least one parallel drip irrigation pipe branch 5 is provided between the water supply pipe 2 and the return pipe 3; Figure 1 The upper end shown is connected to the water supply pipe 2. The outlet of each drip irrigation pipe branch 5 is connected to the return water pipe 3. The water in the water supply pipe 2 is transported to the drip irrigation pipe branch 3 and dripped onto the outer surface of the submarine cable 6 to be cooled, so as to cool the submarine cable 6 to be cooled. The remaining water in the drip irrigation pipe branch 5 is circulated to the water storage tank 1 through the return water pipe 3.

[0028] Specifically, the water supply pipe 2 and the return water pipe 3 are both arranged parallel to the submarine cable 6 to be cooled and landed along its length, and are respectively located on both sides of the submarine cable 6 to be cooled and landed (e.g., Figure 1 (As shown on the upper and lower sides). The left end of the water supply pipe 2 serves as the inlet of the water supply pipe 2, which is connected to the outlet of the water storage tank 1; the water supply pipe 2 has several outlets along its length, which correspond one-to-one with the drip irrigation water pipe branches 5. The drip irrigation water pipe branches 5 are arranged side by side and spaced apart along the length of the submarine cable 6 to be cooled and landed. Furthermore, the inlet of each drip irrigation water pipe branch 5 (such as...) Figure 1 The upper end (as shown) is connected to the corresponding outlet on the water supply pipe 2, so that water is supplied to the drip irrigation branch 5 through the water supply pipe 2, and then the water droplets are dripped onto the outer surface of the submarine cable 6 to be cooled through the drip irrigation branch 5, thereby cooling the surface of the submarine cable 6 to be cooled, which is beneficial to the heat dissipation of the conductor of the submarine cable landing section, thereby increasing the current carrying capacity of the submarine cable landing section and increasing the actual transmission capacity of the submarine cable. The return water pipe 3 has several inlets along its length, which correspond one-to-one with the drip irrigation branch 5, and the outlet of each drip irrigation branch 5 (such as...) Figure 1 The lower end of each drip irrigation pipe branch 5 is connected to the inlet of the return water pipe 3, so that the remaining water in the drip irrigation pipe branch 5 flows back into the return water pipe 3. The left end of the return water pipe 3 serves as the outlet of the return water pipe 3, which is connected to the return water inlet of the water storage tank 1, so that the water flowing back from the return water pipe 3 is circulated into the water storage tank 1, completing the drip cooling process of the submarine cable 6 to be cooled, and also ensuring the circulation and full utilization of water resources. In this embodiment, the pipe diameter and length of each drip irrigation pipe branch 5 are equal, so that the water output of each drip irrigation pipe branch 5 is the same per unit time in the free state, thereby making the cooling effect of each drip irrigation pipe branch 5 on the axial direction of the submarine cable 6 to be cooled consistent, ensuring the temperature consistency at all positions on the axial direction of the submarine cable 6 to be cooled, and avoiding uneven temperature; the drip volume of the drip irrigation pipe branch 5 can also be adjusted by adjusting the water flow rate of the drip irrigation pipe branch 5 to adjust the cooling effect of the submarine cable 6 to be cooled.

[0029] The temperature-sensing optical fiber 4 is used to collect the outer surface temperature of the submarine cable 6 to be cooled in real time. Specifically, the temperature-sensing optical fiber 4 can be installed along the length of the submarine cable 6 to be cooled, so as to collect the surface temperature of the submarine cable 6 to be cooled in real time. Based on the outer surface temperature of the submarine cable 6 to be cooled, the effect of the drip cooling device and the pressure and flow rate parameters of the pressure regulating valve 9 on each drip irrigation pipe branch 5 can be obtained through inversion calculation of the conductor temperature of the submarine cable.

[0030] The controller is electrically connected to the temperature-measuring optical fiber 4 to acquire the outer surface temperature of the submarine cable 6 to be cooled during landing. Based on this temperature, the controller adjusts the water flow rate of each drip irrigation pipe branch 5 to regulate the amount of water dripped from each branch. Specifically, the controller can control the pressure-regulating valve 9 on each drip irrigation pipe branch 5 based on the outer surface temperature of the submarine cable 6 to be cooled, thereby adjusting the pressure of the valve and consequently the flow rate parameters of each branch, thus regulating the amount of water dripped from each branch and adjusting the cooling effect of each branch on the submarine cable 6.

[0031] See also Figure 1 The water storage tank 1 is connected to a water supply pipe 11, and a water supply pump 12 is installed on the water supply pipe 11 to pump water from the well 7 into the water storage tank 1. Specifically, the well 7, the water supply pipe 11, the water pump 12, and the water storage tank 1 constitute the water source of the device, so as to continuously supply water to the water supply pipe 2, thereby continuously cooling the submarine cable 6 to be cooled.

[0032] See also Figure 1 A main water pump 8 is installed on the water supply pipe 2 to pump water from the water storage tank 1 into the water supply pipe 2 and deliver it to the drip irrigation water pipe branch 5 to achieve cooling of the submarine cable 6 to be cooled.

[0033] See also Figure 1 Each of the drip irrigation pipe branches 5 is equipped with a pressure-stabilizing valve 9, which is used to adjust the water flow rate in the drip irrigation pipe branch 5, so that the water flow rate among the drip irrigation pipe branches 5 is consistent. That is, by adjusting the pressure-stabilizing valve 9, the water output of each drip irrigation pipe branch 5 is the same per unit time, thereby further ensuring that the cooling effect of each drip irrigation pipe branch 5 on the axial direction of the submarine cable 6 to be cooled is consistent, thus further ensuring the temperature consistency at all positions of the submarine cable 6 to be cooled along the axial direction and avoiding temperature unevenness. The setting of the pressure-stabilizing valve 9 also allows the main water pump 8 and the water supply pipe 2 to transport water from the water storage tank 1 to the inlet of each drip irrigation pipe branch 5. The water flows into each drip irrigation pipe branch 5 at a uniform speed through the pressure-stabilizing valve 9, and the water droplets drip out from the drip irrigation pipe branch 5 onto the outer surface of the submarine cable 6 to be cooled, ensuring the consistency and uniformity of the dripping. In this embodiment, the pressure-stabilizing valve 9 is positioned near the inlet of each drip irrigation branch 5, ensuring that the water inflow to each drip irrigation branch 5 is the same per unit time, thereby ensuring that the dripping volume of each drip irrigation branch 5 is the same per unit time. In this embodiment, the outlet pressure of the main water pump 8 is greater than the sum of the pressure settings of the pressure-stabilizing valves 9 on each drip irrigation branch 5, thereby ensuring that the water flow in the water supply pipe 2 can be delivered to each drip irrigation branch 5.

[0034] See also Figure 1 The return water pipe 3 is equipped with a flow-aiding pump 10, and there can be multiple flow-aiding pumps 10 arranged side by side along the length of the return water pipe 3. Specifically, the flow-aiding pump 10 can correspond one-to-one with the drip irrigation pipe branch 5, and the flow-aiding pump 10 is located downstream of the return flow of the return water pipe 3 and the corresponding drip irrigation pipe branch 5, so that the remaining water flow in the drip irrigation pipe branch 5 can flow back into the return water pipe 3 under the action of the flow-aiding pump 10.

[0035] In this embodiment, the main water pump 8, water supply pipe 2, pressure stabilizing water valve 9, drip irrigation water pipe branch 5, auxiliary water pump 10, return water pipe 3 and water storage tank 1 constitute the water flow circuit of the device.

[0036] See Figure 2 This is a schematic diagram of the structure of a drip irrigation pipe branch provided in an embodiment of the present invention. Figure 1 and Figure 2 As shown, the drip irrigation pipe branch 5 includes: a water supply section 51, a water outlet section 52, and a winding section 53; wherein, the water inlet of the water supply section 51 (e.g., Figure 1 The upper end shown is connected to the water supply pipe 2; the outlet of the water outlet section 53 (as shown) Figure 1 The lower end (shown) is connected to the return water pipe 3; the winding section 52 is disposed between the water supply section 51 and the water outlet section 53, and has a serpentine structure, used to wind around the submarine cable 6 to be cooled, so as to cool the submarine cable 6 to be cooled by dripping water. In specific implementation, the winding section 53 can be evenly wound in a spiral shape around the submarine cable 6 to be cooled, and the drip irrigation pipe branches 5 are evenly spaced to ensure uniform cooling of the submarine cable 6 to be cooled. To achieve dripping, preferably, the winding section 53 is provided with a water outlet hole 531 for dripping water to cool the submarine cable 6 to be cooled by dripping water. More preferably, the winding section 53 is evenly arranged with water outlet holes 531 so as to drip water evenly.

[0037] In summary, the submarine cable landing section equalization drip cooling device provided in this embodiment, through the arrangement of a water storage tank 1, a water supply pipe 2, a return water pipe 3, and a drip irrigation pipe branch 5, supplies water to the drip irrigation pipe branch 5 via the water supply pipe 2, so that water droplets are dripped onto the outer surface of the submarine cable 6 to be cooled during landing, thereby cooling the surface of the submarine cable 6 and facilitating heat dissipation of the conductors in the landing section of the submarine cable line, thereby increasing the current carrying capacity of the submarine cable landing section and increasing the actual transmission capacity of the submarine cable; and the drip irrigation pipe branch... The remaining water in pipe 5 flows back into the return pipe 3, and then circulates back to the storage tank 1 through the return pipe 3, completing the drip cooling process of the submarine cable 6 to be cooled during landing. This also ensures the recycling and full utilization of water resources. Furthermore, the drip rate of the drip irrigation pipe branch 5 can be adjusted by regulating the water flow rate, thereby regulating the cooling effect of the submarine cable 6 to be cooled during landing. This solves the problems of existing methods for reducing cable loss during landing being ineffective and difficult to adjust. Simultaneously, this device also has the following technical advantages:

[0038] First, the device forms a dynamic loop of cooling water flow through the main water pump, main outlet pipe, pressure stabilizing valve, drip irrigation branch pipes, auxiliary flow pump, main return pipe, and storage tank. The pressure stabilizing valve and drip irrigation branch pipes with equal diameter and length ensure that the water output of each drip irrigation branch pipe is the same per unit time, resulting in a consistent axial cooling effect on the submarine cable landing section. This makes the device for uniform drip cooling of the submarine cable landing section water-saving and consistent cooling effect on the submarine cable landing section.

[0039] Secondly, using drip irrigation technology can save water consumption and make full use of the cooling effect of water flow;

[0040] Third, due to the varying heights of the submarine cable landing sections, the remaining water flow in the drip irrigation pipe branches may lack sufficient power to flow back to the storage tank. The pressurization effect of the auxiliary water pump can ensure that the remaining water flow is recycled to the storage tank, so that the water flow is circulated and fully utilized, thus saving water resources.

[0041] Fourth, by calculating the inverse relationship between the surface temperature of the submarine cable and the conductor temperature, in addition to obtaining the effect of the key drip cooling device, it can also provide a reference for adjusting the pressure and flow parameters of the pressure stabilizing valves in each drip irrigation pipe branch.

[0042] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0043] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A device for equalizing drip cooling in the landing section of a submarine cable, characterized in that, include: Water storage tank, water supply pipe, return water pipe, temperature measuring fiber optic cable, and controller; among which, The ends of the water supply pipe and the return pipe are both connected to the water storage tank, and at least one drip irrigation pipe branch is provided in parallel between the water supply pipe and the return pipe. The inlet of each drip irrigation pipe branch is connected to the water supply pipe, and the outlet of each drip irrigation pipe branch is connected to the return water pipe. This is used to transport the water flow in the water supply pipe to the drip irrigation pipe branch and drip it onto the outer surface of the submarine cable to be cooled, so as to cool down the submarine cable to be cooled. The remaining water flow in the drip irrigation pipe branch is circulated to the water storage tank through the return water pipe. Each of the drip irrigation pipe branches is equipped with a pressure-regulating valve to adjust the water flow rate within the drip irrigation pipe branch; The diameter and length of each drip irrigation pipe branch are equal. The temperature-sensing optical fiber is used to collect the outer surface temperature of the submarine cable to be cooled in the landing section in real time. The controller is electrically connected to the temperature-measuring optical fiber and is used to acquire the outer surface temperature of the submarine cable to be cooled landing section. Based on the outer surface temperature of the submarine cable to be cooled landing section, the controller adjusts the water flow rate of each drip irrigation pipe branch to adjust the drip volume of each drip irrigation pipe branch.

2. The submarine cable landing section uniform drip cooling device according to claim 1, characterized in that, The drip irrigation pipe branch includes: The water supply section has its inlet connected to the water supply pipe. The outlet section has its outlet connected to the return water pipe. The winding section, located between the water supply section and the water outlet section, has a serpentine structure and is used to wind around the submarine cable of the landing section to be cooled in a serpentine structure, so as to cool the submarine cable of the landing section to be cooled by dripping water.

3. The submarine cable landing section uniform drip cooling device according to claim 2, characterized in that, The winding section is provided with a water outlet for dripping water.

4. The submarine cable landing section uniform drip cooling device according to any one of claims 1 to 3, characterized in that, The water supply pipe is equipped with a main water pump, which is used to pump water from the water storage tank into the water supply pipe and deliver it to the drip irrigation water pipe branch.

5. The submarine cable landing section uniform drip cooling device according to claim 4, characterized in that, The outlet pressure of the main water pump is greater than the sum of the pressure settings of the pressure stabilizing valves on each of the drip irrigation pipe branches.

6. The submarine cable landing section uniform drip cooling device according to any one of claims 1 to 3, characterized in that, The return water pipe is equipped with a flow-aiding water pump, and there are multiple flow-aiding water pumps arranged side by side along the length of the return water pipe.

7. The submarine cable landing section uniform drip cooling device according to any one of claims 1 to 3, characterized in that, The water storage tank is connected to a water supply pipe, and the water supply pipe is equipped with a water pump for pumping water from the well into the water storage tank.

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