Deep sea crane fiber rope temperature control method and system

Abstract

The application discloses a deep-sea crane fiber rope temperature control method and system, and relates to the field of deep-sea engineering.The method comprises the following steps: continuously collecting surface axial temperature distribution data of the fiber rope by means of a thermal imager array; activating a cooling mode for the fiber rope according to a temperature control strategy to perform cooling treatment on the fiber rope; the temperature control strategy comprises the following steps: when it is detected that the axial temperature gradient is less than a first threshold value and / or the axial single-point temperature is greater than or equal to a second threshold value, a first control instruction is generated, and a micro-permeation mode is triggered by means of the first control instruction; when it is detected at least twice continuously that the axial temperature gradient is greater than or equal to the first threshold value and less than a third threshold value and / or the axial single-point temperature is greater than or equal to a fourth threshold value, a second control instruction is generated, and the micro-permeation mode is switched to a local atomization mode by means of the second control instruction.The application can perform targeted cooling on different axial temperatures of the surface of the fiber rope.

Description

Technical Field

[0001] This application relates to the field of deep-sea engineering, and in particular to a method and system for temperature control of fiber ropes for deep-sea cranes. Background Technology

[0002] Deep-sea cranes are indispensable engineering vessel equipment in marine engineering construction. To reduce the impact of wave undulation on deep-sea crane operations and improve the accuracy and safety of underwater operations, heave compensation equipment needs to be installed between the mother ship and the underwater load to perform active heave compensation. During the heave compensation process, the fiber optic cable passes through multiple rotating traction pulleys. The reciprocating motion of the fiber optic cable and the alternating rotating traction pulleys cause mutual friction, generating heat. Existing cooling methods for the fiber optic cable use overall spraying or air cooling.

[0003] However, existing cooling methods are limited and cannot effectively cool the fiber rope surface at different axial temperatures. Summary of the Invention

[0004] The purpose of this application is to provide a method and system for temperature control of fiber ropes for deep-sea cranes, which can target the cooling of different axial temperatures on the surface of the fiber rope.

[0005] To achieve the above objectives, this application provides the following solution:

[0006] In a first aspect, this application provides a method for temperature control of fiber ropes in deep-sea cranes. This method is used to cool the fiber ropes assembled in deep-sea lifting equipment, including:

[0007] When the deep-sea crane is in operation, the surface axial temperature distribution data of the fiber rope is continuously collected by a thermal imager array, and the axial temperature gradient and axial single-point temperature are obtained based on the surface axial temperature distribution data.

[0008] The cooling mode of the fiber rope is activated according to the temperature control strategy to cool the fiber rope. The cooling mode includes: micro-penetration mode and local atomization mode.

[0009] The temperature control strategy includes:

[0010] When the axial temperature gradient is detected to be less than a first threshold, and / or the axial single-point temperature is greater than or equal to a second threshold, a first control command is generated, and the micro-permeability mode is triggered by the first control command.

[0011] When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command.

[0012] Secondly, this application provides a fiber rope temperature control system for a deep-sea crane. This system is used to cool the fiber ropes assembled in deep-sea crane equipment. The deep-sea crane equipment includes a boom, with a first pulley and a second pulley respectively installed at both ends. Multiple supports are evenly spaced on the boom. The first pulley can move horizontally along a transverse fixed rod to adjust the height of the second pulley. The second pulley is fixed at the intersection of the boom and one end of the maintenance passage. The other end of the maintenance passage is fixed to one end of the transverse fixed rod. The fiber rope passes sequentially through the second pulley and the first pulley, suspending a load vertically.

[0013] A thermal imager array is used to continuously collect surface axial temperature distribution data of the fiber rope. The thermal imager array includes multiple sets of thermal imagers, and each set of thermal imagers is fixed to the top inner side of the support in the form of wrapping the fiber rope.

[0014] An activation module is used to activate a cooling mode for the fiber rope according to a temperature control strategy, so as to cool the fiber rope. The cooling mode includes a micro-penetration mode and a local atomization mode.

[0015] Regarding the temperature control strategy, the activation module is used for:

[0016] When the axial temperature gradient is detected to be less than a first threshold, and / or the axial single-point temperature is greater than or equal to a second threshold, a first control command is generated, and the micro-permeability mode is triggered by the first control command.

[0017] When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command.

[0018] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0019] This application provides a method and system for temperature control of fiber ropes for deep-sea cranes. The method activates cooling modes for the fiber rope based on different activation conditions included in the temperature control strategy. These cooling modes include a micro-penetration mode and a localized atomization mode. Different cooling modes are activated based on the axial gradient temperature values ​​and axial single-point temperature values ​​of the fiber rope at different time periods. When the axial temperature gradient is detected to be less than a first threshold, and / or the axial single-point temperature is greater than or equal to a second threshold, a first control command is generated, triggering the micro-penetration mode. When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than a third threshold, and / or the axial single-point temperature is greater than or equal to a fourth threshold at least twice consecutively, a second control command is generated, switching the micro-penetration mode to the localized atomization mode. This allows for targeted cooling of different axial temperatures on the fiber rope surface, making the temperature control of the deep-sea crane fiber rope more accurate and intelligent, thereby extending the service life of the fiber rope. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an application environment diagram of a fiber rope temperature control method for a deep-sea crane according to one embodiment of this application;

[0022] Figure 2 A schematic flowchart illustrating a fiber rope temperature control method for a deep-sea crane, provided as an embodiment of this application;

[0023] Figure 3 A schematic diagram of a deep-sea crane structure is provided as an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the first cooling unit provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of a first pulley structure provided in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-First pulley; 1001-Permeation channel; 1002-First drain hole; 1003-Coolant delivery channel; 1004-First nozzle; 1005-Second nozzle; 1006-Built-in temperature sensor; 2-Second pulley; 3-Hanging arm; 4-Bracket; 5-Horizontal fixing rod; 6-Maintenance channel; 7-Fiber rope; 8-Thermal imager. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] To address these issues, this application proposes a gradient temperature control system for a deep-sea fiber rope crane, which can monitor the temperature changes and gradient levels of the internal and external structures of the fiber rope and the traction pulley side in real time, thereby achieving real-time temperature control.

[0032] The fiber rope temperature control method for deep-sea cranes provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be set up independently, integrated into server 104, or placed in the cloud or on another server. Terminal 102 can send the axial temperature gradient and axial single-point temperature to be processed to server 104. After receiving the axial temperature gradient and axial single-point temperature, server 104 activates a cooling mode for the fiber rope according to a temperature control strategy. Server 104 can feed back the obtained cooling mode to terminal 102. Furthermore, in some embodiments, the deep-sea crane fiber rope temperature control method can also be implemented independently by server 104 or terminal 102. For example, terminal 102 can directly process the axial temperature gradient and axial single-point temperature, or server 104 can obtain the axial temperature gradient and axial single-point temperature from the data storage system and process them accordingly.

[0033] The terminal 102 can be, but is not limited to, various desktop computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle devices. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted devices. The server 104 can be implemented using a standalone server or a server cluster composed of multiple servers, or it can be a cloud server.

[0034] In one exemplary embodiment, such as Figure 2 As shown, a method for temperature control of fiber ropes in deep-sea cranes is provided. This method is executed by computer equipment, specifically by a terminal or server alone, or by both a terminal and a server. In this embodiment, the method is applied to... Figure 1 Taking server 104 as an example, the explanation includes the following steps S201 to S202. Wherein:

[0035] In step S201, when the deep-sea crane is in operation, the surface axial temperature distribution data of the fiber rope is continuously collected by a thermal imager array, and the axial temperature gradient and axial single-point temperature are obtained based on the surface axial temperature distribution data.

[0036] like Figure 3 The diagram shows the structure of a deep-sea lifting device. The device includes a boom 3, with a first pulley 1 and a second pulley 2 at each end. Multiple supports 4 are evenly spaced on the boom 3. The first pulley 1 can move horizontally along a transverse fixed rod 5 to adjust the height of the second pulley 2. The second pulley 2 is fixed at the intersection of the boom 3 and one end of the maintenance channel 6. The other end of the maintenance channel 6 is fixed to one end of the transverse fixed rod 5.

[0037] When operating at sea, ship-borne cranes are subject to the effects of wind, waves, currents, and tides, causing the mother ship to exhibit six degrees of freedom of motion: yaw, sway, pitch, roll, roll, and heave. Among these six degrees of freedom, sway, pitch, and heave cause vertical movement of the mother ship's lifting point, severely impacting the deep-sea crane. Especially in sea states of level four and above, the heave of the mother ship causes the crane's underwater load to sway up and down with the waves, and the suspended hooks also sway from side to side, undergoing periodic heave-and-hover movements. This not only significantly reduces operational efficiency and lifting positioning accuracy but also, due to the immense tension on the cables, can lead to cable breakage and loss of the underwater load.

[0038] To mitigate the impact of wave undulations on deep-sea crane operations and improve the accuracy and safety of underwater operations, active heave compensation equipment must be installed between the mother ship and the underwater load. This active heave compensation system monitors the ship's heave displacement in real time, controls the drive based on the ship's motion, calculates the vertical displacement of the winch lifting point or crane end via coordinate rotation transformation, and calculates the length of the retrieved or released cable based on the vertical displacement to counteract the heave motion's effect on the hook or load position, thus maintaining a relatively stable position for the hook or load.

[0039] In operation, the active heave wave compensation mechanism involves the fiber rope 7 starting from a fixed point inside the deep-sea lifting equipment, sequentially bending and passing under the guidance of the second pulley 1 and the first pulley 2, before suspending the load vertically. The first pulley 1 and the second pulley 2 respectively bear the total load of the equipment, providing multi-pulley buffering to avoid single-point overload and reduce the degree of bending of the fiber rope 7 during operation. During the continuous reciprocating motion of the fiber rope 7, friction occurs between the fiber rope 7 and the first pulley 1 and the second pulley 2, generating heat. This heat accumulates in the fiber rope and pulleys over the heave compensation period. It should be noted that the number of turns of the fiber rope 7 around the second pulley 1 and the first pulley 2 is determined by the actual working conditions and is not specifically limited in this application.

[0040] To address the issue of rising fiber rope temperature, cooling measures are necessary. This requires continuously collecting axial temperature distribution data of the fiber rope's surface using a thermal imaging array. For example... Figure 3 As shown, the thermal imager array includes multiple sets of thermal imagers. Thermal imager 8 can be selected as a multispectral infrared thermal imager. Each set of thermal imagers 8 is fixed to the top inner side of the support 4 by wrapping around the fiber rope 7, ensuring that the thermal imager can cover the path of the fiber rope 7 above the boom 3. The multispectral infrared thermal imager continuously acquires the infrared radiation intensity of the fiber rope surface and converts the infrared radiation intensity into temperature information. The axial temperature distribution data of the fiber rope surface includes a timestamp, position coordinates along the fiber rope axis, and the corresponding temperature value.

[0041] The spatial region containing fiber rope 7 is divided into N along the axial direction. x The grid consists of evenly spaced cells, with the spatial region referring to the area between the first pulley 1 and the second pulley 2. The length of each cell is: Where L represents the length of the fiber rope between the first pulley 1 and the second pulley 2. The fiber rope 7 is divided into N sections radially. r There are 15 equally spaced annular layers, each with a thickness of [missing information]. Where R represents the radius of fiber rope 7. The surface temperature data collected by thermal imager 8 is denoted as T. s (x i,t), where x represents the axial position of the fiber rope and t represents time. For each detection point x i The temperature value can be directly read from the preprocessed data as the axial single-point temperature T of that point. s (x i ,t).

[0042] The axial temperature gradient represents the rate of temperature change along the axial direction of the fiber rope. It can be approximated at a point x using the central difference method. i Temperature gradient ΔT at:

[0043]

[0044] Among them, T s (x i+1 ,t) and T s (x i-1 ,t) represent the temperature values ​​of two adjacent points, and Δx represents the distance between two adjacent points.

[0045] Axial temperature gradients reflect the rate and direction of temperature change in space. As a vector, it describes how heat flows along fiber ropes and areas where thermal stress may concentrate. Large gradients indicate drastic temperature changes, potentially leading to thermal stress or even structural damage within or on the surface of the material. Single-point temperatures, on the other hand, provide the absolute temperature value at a specific location. This scalar data is directly related to the material's tolerance limits, such as melting point and ignition point, and is crucial for determining whether a point is approaching a dangerous temperature threshold. Relying solely on gradient analysis may overlook local hotspots—regions with gentle gradients but extremely high temperatures. These points may be due to friction or other factors causing abnormal temperature increases, posing a risk of phase transition or fire hazards. Conversely, focusing only on single-point temperatures can identify extreme temperature conditions but cannot optimize the overall heat distribution or observe the direction of heat transfer, failing to effectively identify problems with poor heat dissipation. Combining both approaches allows for accurate identification and response to localized high-temperature points to avoid potential risks. Furthermore, comprehensive analysis of the entire temperature field enables optimization of cooling strategies, ensuring uniform heat dissipation and preventing material failure or other safety accidents caused by localized overheating. This provides a complete description of the spatial distribution and critical state of the temperature field.

[0046] In step S202, a cooling mode for the fiber rope is activated according to the temperature control strategy to cool the fiber rope. The cooling modes include micro-penetration mode and local atomization mode.

[0047] In one embodiment, the temperature control strategy in step S202 includes the following sub-steps A1-A2:

[0048] A1. When the axial temperature gradient is detected to be less than the first threshold and / or the axial single-point temperature is greater than or equal to the second threshold, a first control command is generated, and the micro-permeability mode is triggered by the first control command.

[0049] Specifically, when the micro-permeability mode is triggered, the first condition is that the axial temperature gradient is less than a first threshold (e.g., ΔT < 15℃), and the second condition is that the axial single-point temperature is greater than or equal to a second threshold (e.g., T). s (x i When the first and second conditions are simultaneously met, or one of them is met, a first control command is generated, and the micro-permeation mode is triggered by the first control command. For the determination that the axial temperature gradient is less than the first threshold, a small axial temperature gradient means that the temperature distribution along the entire fiber rope is relatively uniform, with no significant temperature difference. This usually indicates the absence of severe frictional hotspots or other factors causing a sudden increase in local temperature. When a large axial temperature gradient is detected, it means that there is a significant temperature change along the fiber rope axis. This usually indicates a potential local hotspot or a problem area with poor heat dissipation. Such a large temperature gradient may lead to thermal stress concentration, which can adversely affect the structural integrity and service life of the fiber rope. However, in some cases, even if the overall temperature distribution is relatively uniform, there may be individual locations with excessively high temperatures, which can also threaten the safety and durability of the material. Therefore, the axial single-point temperature must also be considered. The determination that the axial single-point temperature is greater than or equal to the second threshold is mainly used to identify potentially overlooked local high-temperature points. Even if the overall temperature change is not significant, if the temperature at a specific location approaches or exceeds the material's safe operating limits (such as melting point, ignition point, etc.), then immediate measures are needed to avoid potential damage or failure.

[0050] In one embodiment, the "triggering micro-penetration mode via a first control command" part of step A1 includes the following sub-steps A11-A12:

[0051] A11. Send the first control command to the first switch controller.

[0052] A12. The first switch is opened by controlling the first switch controller so that the first cooling unit is connected to the coolant delivery channel 1003 and the first cooling unit enters the micro-permeation mode.

[0053] like Figure 4 As shown, Figure 4The first cooling unit includes a permeation channel 1001. Multiple first drain holes 1002 are evenly arranged on the inner circumference of the permeation channel 1001. The first cooling unit is embedded in the bottom of the pulley groove of the first pulley 1 and the second pulley 2 respectively. The micro-permeation mode refers to the cooling treatment of the fiber rope 7 by the cooling liquid permeating through the multiple first drain holes 1002.

[0054] When the first switch controller opens the first switch, the first cooling unit connects to the coolant delivery channel 1003. Because the first drain hole 1002 is evenly distributed along the circumference of the inner wall of the permeation channel 1001, the coolant can cover the surface of the fiber rope and form a thin protective film, thus ensuring uniform cooling of the entire contact surface. The micro-permeation mode provides a gentler cooling effect, avoiding thermal stress problems caused by rapid cooling.

[0055] A2. When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command.

[0056] Specifically, when switching from micro-permeation mode to local atomization mode, the third condition is that an axial temperature gradient is detected at least twice consecutively, which is greater than or equal to the first threshold and less than the third threshold (e.g., 15℃ < ΔT ≤ 30℃), and the fourth condition is that the axial single-point temperature is greater than or equal to the fourth threshold (e.g., T). s (x i When the third and fourth conditions are met simultaneously, or one of them is met, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command.

[0057] In one embodiment, the "switching the micro-penetration mode to the local atomization mode via a second control command" part of step A2 includes the following sub-steps A21-A22:

[0058] A21. Send the second control command to the second switch controller, and send the first control command to the first switch controller.

[0059] A22. The second switch is opened by controlling the second switch controller so that the second cooling unit is connected to the coolant delivery channel 1003, the second cooling unit enters the local atomization mode, and the first switch is closed by controlling the first switch controller.

[0060] The second cooling unit includes at least two adjacent first nozzles. The number of first nozzles can be two, three, or more depending on the application. The second cooling unit is located at the vertical circulation point of the first pulley, situated at the outer edge of the first pulley and close to the vertical fiber rope. This arrangement ensures that the first nozzles are directly aligned with the movement path of the fiber rope 7, guaranteeing that the coolant directly acts on the area requiring cooling. Furthermore, this arrangement helps the coolant adhere better to the fiber rope surface, thereby improving the cooling effect. By having multiple first nozzles operate simultaneously, a large amount of coolant can be converted into fine droplets in a short time and sprayed evenly onto the fiber rope, increasing the cooling speed. The localized atomization mode refers to cooling the fiber rope by spraying coolant through at least two first nozzles.

[0061] In a specific example, such as Figure 5 As shown, three first nozzles 1004 are provided, and all three first nozzles 1004 are connected to the coolant delivery channel 1003. When the second switch controller opens the second switch, all three first nozzles 1004 are in a connected state with the coolant delivery channel 1003. The first nozzles 1004 can be selected as high-pressure atomizing nozzles. The servo motor controller controls the angle and spray mode of the high-pressure atomizing nozzles. The spray modes include, but are not limited to, continuous spray, intermittent spray, and pulse spray. The nozzle angle and spray mode can be selected according to the specific application scenario.

[0062] In one embodiment, the temperature control strategy in step S202 further includes the following sub-steps A3-A6:

[0063] A3. When the axial temperature gradient detected within the first preset time period is less than the first threshold, a third control command is generated, and the local atomization mode is switched to the micro-penetration mode through the third control command.

[0064] A4. When the axial temperature gradient is detected to be greater than or equal to the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fifth threshold, a fourth control command is generated, and the local atomization mode is switched to the full circumferential jet mode through the fourth control command.

[0065] Specifically, when switching from micro-permeation mode to local atomization mode, the fifth condition is that an axial temperature gradient greater than or equal to the third threshold (e.g., ΔT ≥ 30℃) is detected at least twice consecutively, and the sixth condition is that the axial single-point temperature is greater than or equal to the fifth threshold (e.g., T). s (x i When the fifth and sixth conditions are met simultaneously, or one of them is met, a fourth control command is generated, and the local atomization mode is switched to the full circumferential jet mode through the fourth control command.

[0066] In one embodiment, the part of step A4 that "switches the local atomization mode to the circumferential jet mode by a fourth control command" includes the following sub-steps A41-A42:

[0067] A41. Send the fourth control command to the fourth switch controller.

[0068] A42. The third switch is opened by controlling the fourth switch controller so that the third cooling unit is connected to the coolant delivery channel 1003 and the third cooling unit enters the full circumferential jet mode.

[0069] The third cooling unit includes at least three second nozzles, which are arranged at the same angle to each other on the outer edge of the first pulley. The circumferential jetting mode refers to cooling the fiber rope by spraying coolant through the at least three second nozzles. Because the second nozzles are evenly distributed around the fiber rope at the same angle, coolant can be sprayed onto the fiber rope from all directions, ensuring that every part of the fiber rope is effectively cooled. By spraying coolant simultaneously at multiple points, the overall temperature of the fiber rope can be rapidly reduced in a short time.

[0070] In a specific example, such as Figure 5 As shown, three second nozzles 1005 are provided, with each pair of nozzles forming a 120° angle, resulting in a 120° jet coverage angle, enabling wide-angle jet spraying for cooling in the entire circumference. When the fourth switch controller opens the third switch, all three second nozzles 1005 are connected to the coolant delivery channel 1003. The second nozzles 1005 can be selected as high-pressure atomizing nozzles. The servo motor controller controls the angle and spray mode of the high-pressure atomizing nozzles. Spray modes include, but are not limited to, continuous spraying, intermittent spraying, and pulse spraying. The nozzle angle and spray mode can be selected according to the specific application scenario.

[0071] A5. When the axial temperature gradient detected within the second preset time period is greater than or equal to the first threshold and less than the third threshold, a fifth control command is generated, and the full-circumferential jet mode is switched to the local atomization mode through the fifth control command.

[0072] For example, assuming the second preset time period is set to 60 seconds, if the axial temperature gradient detected within 60 seconds is greater than or equal to the first threshold and less than the third threshold (e.g., 15℃ ≤ ΔT < 30℃), it indicates that the fiber rope has a certain degree of temperature non-uniformity, but has not yet reached the level requiring the strongest cooling measures. At this time, a fifth control command will be generated, which will switch the current full-circumferential jet mode to a local atomization mode. This adjustment aims to cool areas with large temperature changes that are still within a controllable range, while also avoiding resource waste caused by over-cooling.

[0073] A6. When the axial temperature gradient detected within the second preset time period is less than the first threshold, a sixth control command is generated, and the local atomization mode is switched to the micro-penetration mode through the sixth control command.

[0074] For example, assuming the second preset time period is set to 60 seconds, if the axial temperature gradient is detected to be less than the first threshold (e.g., ΔT < 15℃) within 60 seconds, it indicates that the temperature distribution of the fiber rope has become relatively uniform after the initial cooling treatment, and the overall temperature level is within a safe range. At this point, continuing to use high-intensity cooling is not only unnecessary but may also cause unnecessary damage to the material properties of the fiber rope. Therefore, a sixth control command is generated to switch the current localized atomization mode to a gentler micro-penetration mode. This adjustment aims to maintain the fiber rope at a stable and safe temperature while reducing coolant consumption and improving the overall system efficiency. Through this refined temperature control strategy, the temperature control system of the deep-sea crane fiber rope can flexibly adjust the cooling mode based on real-time monitored temperature data, ensuring that the fiber rope maintains optimal working condition under various operating conditions, thereby extending the service life of the fiber rope and improving the operating efficiency and safety of the deep-sea crane.

[0075] It should be noted that the first switch is respectively set at the bottom of the groove of the first pulley 1 and the second pulley 2, and the second switch and the third switch are all set at the bottom of the groove of the first pulley. The first switch, the second switch and the third switch respectively control the connection between the first cooling unit, the second cooling unit and the third cooling unit and the coolant delivery channel 1003.

[0076] In one embodiment, such as Figure 5 As shown, the first pulley 1 and the second pulley 2 are also equipped with built-in temperature sensors 1006. The built-in temperature sensors 1006 are located at the axis of the first pulley 1 and the second pulley 2 and are used to obtain the temperature change of the pulleys in real time during operation.

[0077] Specifically, by monitoring the temperature at the pulley shaft, abnormal temperature rises in the pulley due to friction or other factors can be detected in a timely manner, and this also provides a supplement to the overall temperature control strategy. The pulley temperature data is synchronously transmitted to the server. For example, when the built-in temperature sensor 1006 detects an abnormal increase in the pulley shaft temperature, a warning can be issued to prevent equipment damage or performance degradation due to overheating.

[0078] In one embodiment, the fiber rope temperature control method for deep-sea cranes further includes the following sub-steps B1-B7:

[0079] B1. In micro-permeation mode, the coolant pump is controlled by the coolant pump controller to output coolant to the coolant delivery channel 1003 at a preset initial flow rate.

[0080] For example, the initial flow rate can be set to 10 ml / min. The initial flow rate setting needs to ensure that it provides sufficient cooling to the fiber rope without wasting resources or causing unnecessary humidity increase due to excessive use of coolant.

[0081] B2. Periodically obtain the fluctuation range of the axial temperature gradient.

[0082] B3. If the fluctuation range of the axial temperature gradient is within the first preset range, a first flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to output coolant to the coolant delivery channel 1003 at a preset initial flow rate.

[0083] For example, if the axial temperature gradient fluctuation range is ≤ ±2℃, it indicates that the current temperature distribution is relatively stable and under control. At this point, the system will generate a first flow control command and send it to the coolant pump controller. Subsequently, the coolant pump controller, based on the received command, adjusts the coolant pump to output coolant to the coolant delivery channel 1003 at a preset initial flow rate (e.g., 10 ml / min), ensuring a suitable cooling effect on the fiber rope. The coolant delivery channel 1003 is connected to the coolant tank.

[0084] B4. If the axial temperature gradient shows an upward trend, a second flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to linearly increase the first output flow rate of the coolant at a preset slope until the first output flow rate reaches the first flow rate limit. Then, the coolant is output according to the first flow rate limit.

[0085] For example, if the axial temperature gradient ΔT of the fiber rope is detected to be increasing, indicating a possible local or overall temperature rise, the system will generate a second flow control command and send it to the coolant pump controller. Based on the received second flow control command, the coolant pump controller will linearly increase the coolant output flow rate according to a preset slope (e.g., 1 ml / (min·℃)). For example, if a temperature increase of 0.5℃ per minute is detected, the coolant output flow rate will increase by 0.5 ml per minute (i.e., 0.5℃ × 1 ml / (min·℃) = 0.5 ml / min). This gradually increasing flow rate adjustment method can quickly respond to temperature increases while avoiding the risk of thermal shock caused by a sudden large injection of coolant. The coolant pump is located inside the coolant tank.

[0086] As the temperature gradient is continuously monitored, the coolant pump will continuously increase its output flow rate until the first output flow rate reaches the preset maximum flow rate limit (e.g., 20 ml / min). Once this limit is reached, the coolant pump will maintain the maximum output flow rate regardless of how much the temperature continues to rise, ensuring that the temperature of the fiber rope is effectively reduced in the shortest possible time.

[0087] B5. In localized atomization mode, the cooling rate is periodically acquired.

[0088] B6. If the cooling rate is less than or equal to the sixth threshold, a third flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to increase the second output flow of coolant by the first step length until the second output flow reaches the second flow limit, at which point coolant is output according to the second flow limit.

[0089] B7. If the cooling rate is greater than the sixth threshold, a fourth flow control command is generated and sent to the coolant pump controller, which then controls the coolant pump to maintain the third output flow.

[0090] Specifically, in localized atomization mode, the system periodically acquires the cooling rate of the fiber rope and adjusts the coolant pump's operation accordingly to ensure optimal cooling. If the detected cooling rate is less than or equal to a sixth threshold (e.g., 0.5°C / min), it indicates that the current cooling measures are insufficient to effectively reduce the temperature. Therefore, the system generates a third flow control command and sends it to the coolant pump controller. The coolant pump controller then gradually increases the second output flow rate of the coolant by increments of the first step (e.g., 2 ml / min), progressively increasing the cooling intensity. This process continues until the second output flow rate reaches a preset second flow rate upper limit (e.g., 30 ml / min). Once this upper limit is reached, the coolant pump will maintain this maximum output flow rate, regardless of whether the cooling rate continues to fall below the threshold, ensuring sufficient cooling for the fiber rope.

[0091] Conversely, if the detected cooling rate exceeds the sixth threshold, indicating that the current cooling strategy is sufficiently effective in reducing the temperature, the system will generate a fourth flow control command and send it to the coolant pump controller. At this point, the coolant pump controller will maintain the existing third output flow rate, avoiding unnecessary resource waste and other problems caused by overcooling. For example, assuming the current coolant output flow rate is 20 ml / min and the cooling rate is 1°C / min, which is higher than the sixth threshold, the system will not adjust the coolant flow rate, maintaining a stable output of 20 ml / min to ensure that cooling requirements are met without excessive coolant consumption.

[0092] It should be noted that when the deep-sea crane is in operation, the fiber rope at the first pulley bears greater tension and friction due to the need to suspend the lifted load. This high-load operating environment makes the first pulley more prone to generating localized high temperatures or large axial temperature gradients, thus threatening the structural integrity and service life of the fiber rope. To effectively address this situation, a first cooling unit, a second cooling unit, and a third cooling unit are simultaneously installed at the first pulley to ensure that the fiber rope is adequately cooled in critical areas.

[0093] In contrast, the second pulley primarily performs auxiliary functions and bears a smaller load, resulting in relatively lower friction and heat generation. Therefore, a first cooling unit is installed on the second pulley to meet daily cooling requirements.

[0094] However, under certain extreme conditions or in special applications, a second and third cooling unit can be added to the second pulley to further improve the cooling effect; this application does not impose specific limitations. For example, in long-term high-load operations or in extremely high ambient temperatures, adding additional cooling measures can more effectively protect the fiber rope and extend its service life.

[0095] In one embodiment, the fiber rope temperature control method for deep-sea cranes further includes:

[0096] In full-circumferential jet mode, a speed reduction command is sent to the crane control system via the CAN bus to reduce the running speed of the fiber rope to below the rated speed.

[0097] Specifically, in the full-circumferential jet mode, in addition to providing comprehensive coolant coverage through multiple secondary nozzles, a speed reduction command is sent to the crane control system via the CAN bus. This speed reduction command aims to reduce the fiber rope's operating speed below the rated speed, for example, from the rated 10 m / min to 5 m / min, to increase the contact time between the coolant and the fiber rope surface, thereby improving cooling efficiency. Furthermore, by reducing the fiber rope's operating speed, not only is friction between the fiber rope and the pulley reduced, decreasing the additional heat and wear generated by friction, but it also further ensures that the coolant can evenly and fully cover the entire fiber rope surface, effectively preventing localized overheating.

[0098] In one embodiment, if the axial single-point temperature is greater than or equal to a seventh threshold (e.g., T) within a third preset time period. s (x i If the temperature is ≥80℃, an audible and visual alarm command will be triggered.

[0099] Specifically, the audible and visual alarm command is transmitted to the audible and visual alarm controller via an internal CAN bus in digital signal form. Upon receiving the command, the controller drives the audible and visual alarm to emit audible and visual signals of a specific frequency and color. The sound signal frequency of the audible and visual alarm can be set to 2000Hz. The light can be selected as a red flashing light, and the flashing frequency can be set to 1Hz. Simultaneously with the alarm, the system generates a thermal history traceability report, recording information related to abnormal fiber rope temperature events: the precise time (milliseconds), date, work area number, and fiber rope model and specifications; the temperature data is presented in tabular form, detailing the temperature changes at various radial positions along the fiber rope axis during the system monitoring period.

[0100] In one embodiment, if the amount of temperature detection data lost is greater than or equal to a preset percentage within a detection cycle, a data loss warning is triggered.

[0101] Specifically, suppose that within a monitoring cycle, the system expects to acquire 100 single-point temperature data points from the temperature monitoring channel and synchronize these data, along with coolant consumption data, to the server. If, at the end of the monitoring cycle, the server has only received 80 single-point temperature data points, it indicates a 20% data loss. In this case, the system will trigger a data loss warning, notifying operators that there may be a problem with the monitoring system or that the fiber optic cable is not fully within the monitored area.

[0102] Based on the same inventive concept, this application also provides a method for implementing the aforementioned deep-sea crane fiber rope temperature control system. The solution provided by this system is similar to the solution described in the above method. Therefore, the specific limitations of one or more deep-sea crane fiber rope temperature control system embodiments provided below can be found in the limitations of the deep-sea crane fiber rope temperature control method described above, and will not be repeated here.

[0103] In one exemplary embodiment, such as Figure 3-5 As shown, a fiber rope temperature control system for a deep-sea crane is provided. The system is used to cool down the fiber rope 7 assembled in the deep-sea crane equipment. The deep-sea crane equipment includes a boom, with a first pulley 1 and a second pulley 2 respectively installed at both ends of the boom. Multiple supports 4 are evenly spaced on the boom. The first pulley 1 can move horizontally along a transverse fixed rod 5 to adjust the height of the second pulley 2. The second pulley 2 is fixed at the intersection of the boom 3 and one end of the maintenance channel 6. The other end of the maintenance channel 6 is fixed to one end of the transverse fixed rod 5. The fiber rope 7 is guided by the second pulley 2 and the first pulley 1 in sequence and then suspends the load in the vertical direction.

[0104] The temperature control system for the deep-sea crane fiber rope 7 includes:

[0105] A thermal imager array is used to continuously collect surface axial temperature distribution data of the fiber rope 7. The thermal imager array includes multiple sets of thermal imagers, and each set of thermal imagers is fixed to the top inner side of the bracket 4 in the form of wrapping the fiber rope 7.

[0106] An activation module is used to activate a cooling mode for the fiber rope 7 according to a temperature control strategy, so as to cool the fiber rope 7. The cooling mode includes a micro-penetration mode and a local atomization mode.

[0107] Regarding the temperature control strategy, the activation module is used for:

[0108] When the axial temperature gradient is detected to be less than a first threshold, and / or the axial single-point temperature is greater than or equal to a second threshold, a first control command is generated, and the micro-permeability mode is triggered by the first control command.

[0109] When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command.

[0110] As an optional implementation, in triggering the micro-penetration mode via the first control command, the activation module is specifically used for:

[0111] Send the first control command to the first switch controller;

[0112] The first switch is opened by controlling the first switch controller so that the first cooling unit is connected to the coolant delivery channel 1003 and the first cooling unit enters the micro-permeation mode.

[0113] The first cooling unit includes the permeation channel 1001, and a plurality of first drain holes 1002 are uniformly arranged on the inner circumference of the permeation channel 1001. The first cooling unit is embedded in the bottom of the pulley groove of the first pulley 1 and the second pulley 2. The micro-permeation mode refers to the cooling treatment of the fiber rope 7 by the cooling liquid permeating through the plurality of first drain holes 1002.

[0114] As an optional implementation, in switching the micro-penetration mode to the local atomization mode via the second control command, the activation module is specifically used for:

[0115] The second control command is sent to the second switch controller, and the first control command is sent to the first switch controller;

[0116] The second switch is opened by controlling the second switch controller so that the second cooling unit is connected to the coolant delivery channel 1003 and the second cooling unit enters the local atomization mode. The first switch is closed by controlling the first switch controller.

[0117] The second cooling unit includes at least two adjacent first nozzles 1004. The second cooling unit is located at the vertical circulation point of the first pulley 1. The vertical circulation point is located at the outer edge of the first pulley 1 and close to the vertical fiber rope 7. The local atomization mode refers to cooling the fiber rope 7 by spraying coolant through at least two first nozzles 1004.

[0118] As an optional implementation, the cooling mode also includes a full-circumferential jet mode;

[0119] Regarding temperature control strategies, the activation module is also used for:

[0120] When the axial temperature gradient detected within the first preset time period is less than the first threshold, a third control command is generated, and the local atomization mode is switched to the micro-penetration mode through the third control command.

[0121] When the axial temperature gradient is detected to be greater than or equal to the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fifth threshold, a fourth control command is generated, and the local atomization mode is switched to the full circumferential jet mode through the fourth control command.

[0122] When the axial temperature gradient detected within the second preset time period is greater than or equal to the first threshold and less than the third threshold, a fifth control command is generated, and the full-circumferential jet mode is switched to the local atomization mode through the fifth control command.

[0123] When the axial temperature gradient detected within the second preset time period is less than the first threshold, a sixth control command is generated, and the local atomization mode is switched to the micro-penetration mode through the sixth control command.

[0124] As an optional implementation, when the local atomization mode is switched to the circumferential jet mode via the fourth control command, the activation module is specifically used for:

[0125] The fourth control command is sent to the fourth switch controller;

[0126] The third switch is opened by controlling the fourth switch controller so that the third cooling unit is connected to the coolant delivery channel 1003 and the third cooling unit enters the full circumferential jet mode.

[0127] The third cooling unit includes at least three second nozzles 1005, which are arranged at the same angle between each other at the outer edge of the first pulley 1. The full circumferential jet mode refers to cooling the fiber rope 7 by spraying coolant through at least three second nozzles 1005.

[0128] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 6As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores video tag processing data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a fiber rope temperature control method for deep-sea cranes.

[0129] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0130] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0131] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0132] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0133] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0134] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0135] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0136] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for temperature control of fiber rope in a deep-sea crane, characterized in that, The deep-sea crane fiber rope temperature control method is used to cool down the fiber ropes assembled in deep-sea lifting equipment. The deep-sea crane fiber rope temperature control method includes: When the deep-sea crane is in operation, the surface axial temperature distribution data of the fiber rope is continuously collected by a thermal imager array, and the axial temperature gradient and axial single-point temperature are obtained based on the surface axial temperature distribution data. The cooling mode of the fiber rope is activated according to the temperature control strategy to cool the fiber rope. The cooling mode includes: micro-penetration mode and local atomization mode. The temperature control strategy includes: When the axial temperature gradient is detected to be less than a first threshold and the axial single-point temperature is detected to be greater than or equal to a second threshold, a first control command is generated and the micro-permeability mode is triggered by the first control command. When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command. The step of triggering the micro-penetration mode via the first control command includes: Send the first control command to the first switch controller; The first switch is opened by controlling the first switch controller so that the first cooling unit is connected to the coolant delivery channel and the first cooling unit enters the micro-permeation mode. The first cooling unit includes a permeation channel, and a plurality of first drain holes are evenly arranged on the inner circumference of the permeation channel. The first cooling unit is embedded in the bottom of the pulley groove of the first pulley and the second pulley respectively. The micro-permeation mode refers to the cooling treatment of the fiber rope by the cooling liquid permeating through the plurality of first drain holes. The step of switching the micro-penetration mode to the local atomization mode via the second control command includes: The second control command is sent to the second switch controller, and the first control command is sent to the first switch controller; The second switch is opened by controlling the second switch controller so that the second cooling unit is connected to the coolant delivery channel, the second cooling unit enters the local atomization mode, and the first switch is closed by controlling the first switch controller. The second cooling unit includes at least two adjacent first nozzles. The second cooling unit is located at the vertical circulation point of the first pulley. The vertical circulation point is located at the outer edge of the first pulley and close to the fiber rope in the vertical direction. The local atomization mode refers to cooling the fiber rope by spraying coolant through at least two first nozzles.

2. The method for temperature control of fiber rope in a deep-sea crane according to claim 1, characterized in that, The cooling mode also includes a full-circumferential jet mode; the temperature control strategy also includes: When the axial temperature gradient detected within the first preset time period is less than the first threshold, a third control command is generated, and the local atomization mode is switched to the micro-penetration mode through the third control command. When the axial temperature gradient is detected to be greater than or equal to the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fifth threshold, a fourth control command is generated, and the local atomization mode is switched to the full circumferential jet mode through the fourth control command. When the axial temperature gradient detected within the second preset time period is greater than or equal to the first threshold and less than the third threshold, a fifth control command is generated, and the full-circumferential jet mode is switched to the local atomization mode through the fifth control command. When the axial temperature gradient detected within the second preset time period is less than the first threshold, a sixth control command is generated, and the local atomization mode is switched to the micro-penetration mode through the sixth control command.

3. The method for temperature control of fiber rope in a deep-sea crane according to claim 2, characterized in that, The step of switching the local atomization mode to the circumferential jet mode via the fourth control command includes: The fourth control command is sent to the fourth switch controller; The third switch is opened by controlling the fourth switch controller so that the third cooling unit is connected to the coolant delivery channel and the third cooling unit enters the full circumferential jet mode. The third cooling unit includes at least three second nozzles, which are arranged at the same angle between each other on the outer edge of the first pulley. The full-circumferential jet mode refers to cooling the fiber rope by spraying coolant through at least three second nozzles.

4. The method for temperature control of fiber rope in a deep-sea crane according to claim 1, characterized in that, The deep-sea crane fiber rope temperature control method also includes: In the micro-permeation mode, the coolant pump is controlled by the coolant pump controller to output coolant to the coolant delivery channel at a preset initial flow rate; The fluctuation range of the axial temperature gradient is periodically obtained; If the fluctuation range of the axial temperature gradient is within the first preset range, a first flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to output coolant to the coolant delivery channel at the preset initial flow rate. If the axial temperature gradient shows an upward trend, a second flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to linearly increase the first output flow rate of the coolant at a preset slope until the first output flow rate reaches the first flow rate limit, at which point the coolant is output at the first flow rate limit. In the localized atomization mode, the cooling rate is periodically acquired; If the cooling rate is less than or equal to the sixth threshold, a third flow control command is generated and sent to the coolant pump controller. The coolant pump controller controls the coolant pump to increase the second output flow rate of the coolant by a first step length until the second output flow rate reaches the second flow rate upper limit, at which point the coolant is output according to the second flow rate upper limit. If the cooling rate is greater than the sixth threshold, a fourth flow control command is generated and sent to the coolant pump controller, which then controls the coolant pump to maintain the third output flow.

5. The method for temperature control of fiber rope in a deep-sea crane according to claim 2, characterized in that, The deep-sea crane fiber rope temperature control method also includes: In the full-circumferential jet mode, a speed reduction command is sent to the crane control system via the CAN bus to reduce the running speed of the fiber rope to below the rated speed.

6. A fiber rope temperature control system for a deep-sea crane, characterized in that, The deep-sea crane fiber rope temperature control system is used to cool down the fiber rope assembled in the deep-sea crane equipment. The deep-sea crane equipment includes a boom, with a first pulley and a second pulley respectively installed at both ends of the boom. Multiple supports are installed at equal intervals on the boom. The first pulley can move horizontally along a transverse fixed rod to adjust the height of the second pulley. The second pulley is fixed at the intersection of the boom and one end of the maintenance channel. The other end of the maintenance channel is fixed to one end of the transverse fixed rod. The fiber rope passes through the second pulley and the first pulley in sequence and then suspends the load in the vertical direction. The deep-sea crane fiber rope temperature control system includes: A thermal imager array is used to continuously collect surface axial temperature distribution data of the fiber rope, and obtain axial temperature gradient and axial single-point temperature based on the surface axial temperature distribution data. The thermal imager array includes multiple sets of thermal imagers, and each set of thermal imagers is fixed to the top inner side of the support in the form of wrapping the fiber rope. An activation module is used to activate a cooling mode for the fiber rope according to a temperature control strategy, so as to cool the fiber rope. The cooling mode includes a micro-penetration mode and a local atomization mode. Regarding the temperature control strategy, the activation module is used for: When the axial temperature gradient is detected to be less than a first threshold and the axial single-point temperature is detected to be greater than or equal to a second threshold, a first control command is generated and the micro-permeability mode is triggered by the first control command. When the axial temperature gradient is detected to be greater than or equal to the first threshold and less than the third threshold at least twice consecutively, and the axial single-point temperature is greater than or equal to the fourth threshold, a second control command is generated, and the micro-permeation mode is switched to the local atomization mode through the second control command. In triggering the micro-penetration mode via the first control command, the activation module is specifically used for: Send the first control command to the first switch controller; The first switch is opened by controlling the first switch controller so that the first cooling unit is connected to the coolant delivery channel and the first cooling unit enters the micro-permeation mode. The first cooling unit includes a permeation channel, and a plurality of first drain holes are evenly arranged on the inner circumference of the permeation channel. The first cooling unit is embedded in the bottom of the pulley groove of the first pulley and the second pulley. The micro-permeation mode refers to the cooling treatment of the fiber rope by the cooling liquid permeating through the plurality of first drain holes. In switching the micro-penetration mode to the local atomization mode via the second control command, the activation module is specifically used for: The second control command is sent to the second switch controller, and the first control command is sent to the first switch controller; The second switch is opened by controlling the second switch controller so that the second cooling unit is connected to the coolant delivery channel and the second cooling unit enters the local atomization mode. The first switch is closed by controlling the first switch controller. The second cooling unit includes at least two adjacent first nozzles. The second cooling unit is located at the vertical circulation point of the first pulley. The vertical circulation point is located at the outer edge of the first pulley and close to the fiber rope in the vertical direction. The local atomization mode refers to cooling the fiber rope by spraying coolant through at least two first nozzles.

7. The deep-sea crane fiber rope temperature control system according to claim 6, characterized in that, The cooling mode also includes a full-circumferential jet mode; Regarding temperature control strategies, the activation module is also used for: When the axial temperature gradient detected within the first preset time period is less than the first threshold, a third control command is generated, and the local atomization mode is switched to the micro-penetration mode through the third control command. When the axial temperature gradient is detected to be greater than or equal to the third threshold at least twice consecutively, and / or the axial single-point temperature is greater than or equal to the fifth threshold, a fourth control command is generated, and the local atomization mode is switched to the full circumferential jet mode through the fourth control command. When the axial temperature gradient detected within the second preset time period is greater than or equal to the first threshold and less than the third threshold, a fifth control command is generated, and the full-circumferential jet mode is switched to the local atomization mode through the fifth control command. When the axial temperature gradient detected within the second preset time period is less than the first threshold, a sixth control command is generated, and the local atomization mode is switched to the micro-penetration mode through the sixth control command.

8. The deep-sea crane fiber rope temperature control system according to claim 7, characterized in that, In switching the local atomization mode to the circumferential jet mode via the fourth control command, the activation module is specifically used for: The fourth control command is sent to the fourth switch controller; The third switch is opened by controlling the fourth switch controller so that the third cooling unit is connected to the coolant delivery channel and the third cooling unit enters the full circumferential jet mode. The third cooling unit includes at least three second nozzles, which are arranged at the same angle between each other on the outer edge of the first pulley. The full-circumferential jet mode refers to cooling the fiber rope by spraying coolant through at least three second nozzles.

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