Cable cooling and pay-off control method, control device and working machine

Abstract

The application relates to the technical field of working machines, and provides a cable cooling winding and unwinding control method, a control device and a working machine. The cable cooling winding and unwinding control method comprises the following steps: when the working machine is in a heavy-load working condition, the number of winding layers of the cable on the winding drum is controlled to be less than or equal to a preset heat dissipation winding layer number. That is to say, the winding state of the cable is adjusted based on the working condition of the working machine. For example, when the working machine is in a heavy-load working condition, the heat generation of the cable is relatively large, and the winding state of the cable should be considered based on the heat dissipation effect of the cable to ensure that the working machine normally and safely works. When the working machine is in a heavy-load working condition, the heat dissipation effect of the cable is improved by controlling the number of winding layers of the cable on the winding drum to be less than or equal to the preset heat dissipation winding layer number, so that the working machine can normally work, and the occurrence of fire accidents and other dangerous accidents can be avoided.

Description

Technical Field

[0001] This invention relates to the field of machinery technology, and in particular to a cable cooling and retraction control method, control device, and machinery. Background Technology

[0002] Electric excavators are essential pieces of machinery that require a cable connection to an external power source during operation. The cable's deployment and retraction need to be flexibly controlled during operation. Current technologies mostly adjust the cable deployment and retraction based on the machine's working position. For example, when the machine moves forward, the cable is deployed; when it moves backward, the cable is retracted. However, these methods of cable cooling and deployment control are prone to poor heat dissipation, affecting the normal operation of the machine and, in severe cases, leading to dangerous accidents such as fires. Summary of the Invention

[0003] This invention provides a cable cooling and winding control method, control device, and operating machinery to solve or improve the problems in existing cable cooling and winding control methods, which are prone to poor cable heat dissipation, affecting the normal operation of operating machinery, and in severe cases, leading to dangerous accidents such as fires.

[0004] According to a first aspect of the present invention, a cable cooling and retraction control method is provided, comprising the following steps:

[0005] When the machinery is operating under heavy load, the number of cable winding layers on the control drum is less than or equal to the preset number of heat dissipation winding layers.

[0006] The heavy-load operation condition refers to either the working device of the operating machinery operating independently, or the working device of the operating machinery operating simultaneously with at least one of the upper and lower parts of the operating machinery.

[0007] The cable cooling and retraction control method provided by the present invention further includes:

[0008] When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the operating power of the operating machinery.

[0009] According to the cable cooling and winding control method provided by the present invention, the cable cooling and winding control method further includes:

[0010] When the actual temperature of the cable is less than or equal to the second preset temperature value, the original maximum working power of the operating machinery is restored, and the second preset temperature value is less than the first preset temperature value.

[0011] According to a cable cooling and winding control method provided by the present invention, the step of controlling the number of cable winding layers on the drum to be less than or equal to a preset number of heat dissipation winding layers when the operating machinery is under heavy load specifically includes:

[0012] When the operating machinery is under heavy load and winding cables, if the limit switch detects that the actual number of turns of the cable is greater than the number of turns corresponding to the preset number of heat dissipation winding layers, it will control the motor to stop rotating.

[0013] When the working machinery is under heavy load and laying cables, if the limit switch detects that the actual number of cable windings is greater than the number of windings corresponding to the preset number of heat dissipation winding layers, the motor will be controlled to continue rotating.

[0014] According to the cable cooling and winding control method provided by the present invention, the step of reducing the working power of the operating machinery when the actual temperature of the cable is greater than or equal to a first preset temperature value specifically includes:

[0015] When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the displacement of the hydraulic pump in the operating machinery.

[0016] According to a cable cooling and retraction control method provided by the present invention, the values ​​of the first preset temperature and the second preset temperature are determined based on a third preset temperature:

[0017] First preset temperature = C1% × Third preset temperature;

[0018] Second preset temperature = C2% × Third preset temperature;

[0019] The third preset temperature is the maximum safe operating temperature of the cable.

[0020] According to the cable cooling and winding control method provided by the present invention, the cable cooling and winding control method further includes:

[0021] When the operating machinery is under light load, when laying out the cable, the minimum number of winding turns of the control drum is greater than or equal to the first preset number of winding turns; when winding the cable, the maximum number of winding turns of the control drum is less than or equal to the second preset number of winding turns.

[0022] The light-load operation condition refers to the condition where the working device of the operating machinery is in a non-operating state.

[0023] According to the cable cooling and winding control method provided by the present invention, the step of controlling the minimum number of winding turns of the reel to be greater than or equal to a first preset number of winding turns when winding the cable specifically includes:

[0024] When laying out the cable, if the limit switch detects that the number of rotations of the cable guide is less than the first preset number of winding turns, it controls the motor to stop rotating. The first preset number of winding turns is 2i, where i is the transmission ratio of the transmission sprocket between the drum and the cable guide.

[0025] The step of controlling the maximum number of winding turns of the drum to be less than or equal to the second preset number of winding turns when winding the cable specifically includes:

[0026] When the limit switch detects that the number of rotations of the cable guide is greater than the second preset number of winding turns, it controls the motor to stop rotating. The second preset number of winding turns is less than or equal to the number of winding turns corresponding to the maximum winding capacity of the drum.

[0027] According to a second aspect of the present invention, a cable cooling and retraction control device is provided, comprising:

[0028] The first detection module is used to detect the operating conditions of the machinery.

[0029] The second detection module is used to detect the number of cable winding layers on the reel;

[0030] The control module is used to control the number of cable winding layers on the drum based on the operating conditions of the machinery.

[0031] According to a third aspect of the present invention, a working machine is provided to control the temperature and winding / unwinding state of a cable using the cable cooling and winding / unwinding control method described above, or, it includes the cable cooling and winding / unwinding control device described above.

[0032] In the cable cooling and winding control method provided by this invention, the winding state of the cable is adjusted based on the operating conditions of the machinery. For example, when the machinery is under heavy load, the cable generates relatively more heat. In this case, the winding state should be prioritized based on the cable's heat dissipation effect to ensure the normal and safe operation of the machinery. When the machinery is under heavy load, the number of cable winding layers on the drum is controlled to be less than or equal to a preset heat dissipation winding layer. For example, when the machinery is under heavy load and the number of cable winding layers on the drum is greater than the preset heat dissipation winding layer, the cable is unwound from the drum until the number of cable winding layers on the drum is less than or equal to the preset heat dissipation winding layer. The preset heat dissipation winding layer is a preset value set by the operator in the control module according to actual needs. Therefore, by controlling the number of cable winding layers on the drum to be less than or equal to the preset heat dissipation winding layer when the machinery is under heavy load, the heat dissipation effect of the cable is improved, thereby ensuring the normal operation of the machinery and preventing dangerous accidents such as fires. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a simplified schematic diagram of the working machinery provided by the present invention;

[0035] Figure 2 This is a partial structural schematic diagram of the operating machinery provided by the present invention;

[0036] Figure 3 This is a partial flowchart of the cable cooling and winding control method provided by the present invention;

[0037] Figure 4 This is a schematic diagram of the connection relationship of some structures in the working machinery provided by the present invention;

[0038] Figure label:

[0039] 100. Unloading; 200. Loading; 300. Working device; 400. Drum; 510. Cable guide; 520. Limit switch; 530. Motor; 540. Control module; 550. Alarm device; 560. Temperature sensor. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0041] The following is combined Figures 1 to 4 This invention describes a cable cooling and retraction control method, control device, and operating machinery provided by the present invention. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0042] An embodiment of the first aspect of the present invention provides a cable cooling and retraction control method, comprising the following steps:

[0043] When the operating machinery is under heavy load, the number of cable winding layers on the control drum 400 is less than or equal to the preset number of heat dissipation winding layers.

[0044] Among them, the heavy-duty operation conditions are: the working device 300 of the working machine operates independently; or, the working device 300 of the working machine and the upper vehicle 200 of the working machine operate simultaneously; or, the working device 300 of the working machine and the lower vehicle 100 of the working machine operate simultaneously; or, the working device 300 of the working machine and the upper vehicle 200 and the lower vehicle 100 of the working machine operate simultaneously.

[0045] In the cable cooling and winding control method provided by this invention, the winding state of the cable is adjusted based on the operating conditions of the machinery. For example, when the machinery is operating under heavy load, the heat generated by its cable is relatively large. In this case, to ensure good heat dissipation of the cable, the winding state of the cable should be prioritized based on the cable's heat dissipation effect to ensure the normal and safe operation of the machinery.

[0046] When the machinery is under heavy load, the number of cable winding layers on the control drum 400 is kept less than or equal to a preset number of heat-dissipating winding layers. For example, when the machinery is under heavy load and the actual number of cable winding layers on the drum 400 is greater than the preset number of heat-dissipating winding layers, the control drum 400 unwinds the cable until the number of cable winding layers on the drum 400 is less than or equal to the preset number of heat-dissipating winding layers. The preset number of heat-dissipating winding layers is a value pre-set by the operator in the control module 540 according to actual needs. Therefore, by controlling the number of cable winding layers on the drum 400 to be less than or equal to the preset number of heat-dissipating winding layers when the machinery is under heavy load, the heat dissipation effect of the cable is improved, thereby ensuring the normal operation of the machinery and preventing dangerous accidents such as fires.

[0047] like Figures 1 to 4 As shown, the working machinery includes a lower vehicle 100, an upper vehicle 200, a working device 300, a drum 400, a cable guide 510, a limit switch 520, a drive sprocket, a drive chain, a cable, and a motor 530.

[0048] Please refer to the following: Figure 1 As shown, the lower vehicle 100 can drive the working machinery to move, enabling relocation or adjustment of the overall working position of the machinery within the work site. The upper vehicle 200 can drive the working machinery to rotate, thereby rotating the working device 300 and adjusting its working position and angle. The working device 300 is the working tool of the working machinery; for example, it includes, but is not limited to, an actuation drive mechanism and a rotation drive mechanism. More specifically, it includes, but is not limited to, hydraulic cylinders and hydraulic motors. Attachments such as buckets, hydraulic hammers, and hydraulic shears can be mounted on the working device 300 to perform corresponding excavation, crushing, and other operations.

[0049] Please refer to it again. Figure 2, Figure 4 As shown, motor 530 is connected to the shaft of drum 400 via a reducer to control the winding and unwinding of cable. The shaft of drum 400 is connected to a drive sprocket, which is connected to the shaft of cable guide 510 via a drive chain. Cable is wound onto drum 400 via cable guide 510. A limit switch 520 is also connected to the shaft of cable guide 510. The limit switch 520 determines the number of cable turns on drum 400 by detecting the number of rotations of the cable guide 510 shaft. Operators can determine the preset number of heat-dissipating winding layers within the control module based on the actual cable type and drum 400 model.

[0050] In one embodiment of the present invention, such as Figure 3 As shown, the steps for ensuring that the number of cable winding layers on the drum 400 is less than or equal to the preset number of heat dissipation winding layers when the operating machinery is under heavy load include:

[0051] When the operating machinery is under heavy load and winding cables, when the limit switch 520 detects that the actual number of winding turns of the cable is greater than the number of winding turns corresponding to the preset number of heat dissipation winding layers, the control motor 530 stops rotating. This ensures that the actual number of winding turns of the drum 400 is kept within the number of winding turns corresponding to the preset number of heat dissipation winding layers, so as to ensure the heat dissipation effect.

[0052] When the working machinery is under heavy load and laying cables, if the limit switch 520 detects that the actual number of cable windings is greater than the number of windings corresponding to the preset number of heat dissipation winding layers, the motor 530 is controlled to continue rotating to ensure that the number of cable windings on the drum is kept within the number of windings corresponding to the preset number of heat dissipation winding layers, thus ensuring the heat dissipation effect.

[0053] The preset conditions in the input control module 540 are: the number of winding turns corresponding to the preset number of heat dissipation winding layers = n×B1×i / ((1+10%)×D1), where n is the preset number of heat dissipation winding layers, B1 is the width of the drum 400, i is the transmission ratio of the transmission sprocket between the drum 400 and the cable guide 510, and D1 is the cable diameter.

[0054] When the machinery is operating under heavy load, the cable may be in a wound-up state or in a laid-out state.

[0055] For example, when the machinery is under heavy load and moving away from the external power source (i.e., the cable is being laid out), the motor 530 drives the drum 400 to rotate in the direction where the cable can be laid out via a reducer. The drum 400 drives the shaft of the cable guide 510 to rotate via a transmission sprocket and chain, causing the cable guide 510 to reciprocate along a direction parallel to the shaft of the drum 400, laying out the cable layer by layer. Simultaneously, the limit switch 520 determines the number of cable winding layers based on the number of rotations of the cable guide 510 shaft. When the number of cable winding layers on the drum 400 is less than or equal to the preset number of heat dissipation winding layers, the motor 530 stops rotating. The preset number of heat dissipation winding layers is reflected by the number of cable winding turns. Specifically, the number of winding turns corresponding to the preset number of heat dissipation winding layers = n × B1 × i / ((1 + 10%) × D1), where n is the preset number of heat dissipation winding layers, B1 is the width of the drum 400, i is the transmission ratio of the drive sprocket between the drum 400 and the cable guide 510, and D1 is the cable diameter. For example, n can be set to 2 to improve the heat dissipation effect of the cable.

[0056] For example, when the machinery is under heavy load and moving towards the external power source (i.e., the cable is being wound up), the motor 530 drives the drum 400 to rotate in the direction where the cable can be wound up via a reducer. The drum 400 drives the shaft of the cable guide 510 to rotate via a transmission sprocket and transmission chain, causing the cable guide 510 to reciprocate along a direction parallel to the shaft of the drum 400, winding the cable layer by layer. While winding the cable, the limiter 520 can determine the number of cable winding layers based on the number of rotations of the cable guide 510 shaft. When the number of cable winding layers on the drum 400 exceeds the preset number of heat dissipation winding layers, the motor 530 is controlled to stop rotating to ensure the heat dissipation effect of the cable.

[0057] In one embodiment of the present invention, the cable cooling and winding control method further includes:

[0058] When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the operating power of the operating machinery.

[0059] Furthermore, in one embodiment of the present invention, the cable cooling and retraction control method further includes:

[0060] When the actual temperature of the cable is less than or equal to the second preset temperature value, the original maximum working power of the operating machinery is restored, and the second preset temperature value is less than the first preset temperature value.

[0061] To further prevent dangerous accidents such as cable overheating, the aforementioned control method is implemented, which controls the operating power of the machinery based on the actual cable temperature. Specifically, a first preset temperature value and a second preset temperature value are determined based on the actual cable type used, where the first preset temperature value is greater than the second. The actual cable temperature can be detected using a temperature sensor such as a 560. When the actual cable temperature is greater than or equal to the first preset temperature value, it indicates that the cable urgently needs cooling. At this time, the operating power of the machinery can be reduced, thereby directly reducing the heat generated by the cable and achieving the effect of cable cooling. This control method avoids situations where high-power operation is performed when the cable temperature is relatively high, thus providing further assurance for the safe operation of the cable.

[0062] When the actual temperature of the cable is less than or equal to the second preset temperature value, it indicates that the cable temperature is in an absolutely safe state. At this point, the operating machinery can resume its full-power operation capability. The specific operating state is determined by the operator. This control method ensures that the operating state of the operating machinery is unrestricted while maintaining the cable at a safe temperature.

[0063] For example, in one embodiment of the present invention, the step of reducing the working power of the operating machinery when the actual temperature of the cable is greater than or equal to a first preset temperature value specifically includes:

[0064] When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the displacement of the hydraulic pump in the operating machinery.

[0065] The hydraulic pumps include one or more pumps used to drive the upper carriage 200, the lower carriage 100, and the working device 300 of the operating machinery. The actuators for driving the upper carriage 200, the lower carriage 100, and the working device 300 all include, but are not limited to, hydraulic motors and hydraulic cylinders. Reducing the displacement of the hydraulic pumps in the operating machinery refers to reducing the total displacement of all hydraulic pumps in the operating machinery. The actual working power of the operating machinery can be controlled by controlling the number of hydraulic pumps in operation or the displacement of each hydraulic pump. When reducing the actual working power of the operating machinery, priority should be given to ensuring the safety of the operating machinery in its current state. For example, priority can be given to ensuring that the power of the working device 300 is sufficient to support the current load requirements.

[0066] In one embodiment of the present invention, the values ​​of the first preset temperature and the second preset temperature are determined based on a third preset temperature:

[0067] First preset temperature = C1% × Third preset temperature;

[0068] Second preset temperature = C2% × Third preset temperature;

[0069] The third preset temperature is the maximum safe operating temperature of the cable.

[0070] In other words, the maximum safe operating temperature of the cable can be determined based on the cable type, and a first preset temperature and a second preset temperature can be determined based on the maximum safe operating temperature. For example, in one embodiment of the present invention, C1 can be 90; C2 can be 80; that is, the first preset temperature = 90% × the third preset temperature; the second preset temperature = 80% × the third preset temperature. In actual operation, when the actual temperature of the cable is greater than or equal to 90% of the third preset temperature, the heat generation of the cable can be directly reduced by reducing the operating power of the operating machinery, thereby achieving the effect of cooling the cable. When the actual temperature of the cable is less than or equal to 80% of the third preset temperature, the operating machinery can be restored to its full-power operation capability.

[0071] In one embodiment of the present invention, the cable cooling and winding control method further includes:

[0072] When the operating machinery is under light load, when laying out the cable, the minimum number of winding turns of the control drum 400 is greater than or equal to the first preset number of winding turns; when winding the cable, the maximum number of winding turns of the control drum 400 is less than or equal to the second preset number of winding turns.

[0073] Light-load operation refers to the working device 300 of the operating machinery being in a non-operating state. More specifically, light-load operation includes the working condition of the upper vehicle 200 operating independently, the working condition of the lower vehicle 100 operating independently, and the working condition of only the upper vehicle 200 and the lower vehicle 100 operating simultaneously.

[0074] Furthermore, in one embodiment of the present invention, the step of controlling the minimum number of winding turns of the reel 400 to be greater than or equal to a first preset number of winding turns when laying out the cable specifically includes:

[0075] When laying out the cable, if the limiter 520 detects that the number of rotations of the cable laying device 510 is less than the first preset number of winding turns, it controls the motor 530 to stop rotating. The first preset number of winding turns is 2i, where i is the transmission ratio of the transmission sprocket between the drum 400 and the cable laying device 510.

[0076] When winding the cable, the step of controlling the maximum number of winding turns of the drum 400 to be less than or equal to the second preset number of winding turns specifically includes:

[0077] When the limit switch 520 detects that the number of rotations of the wire guide 510 is greater than the second preset number of winding turns, it controls the motor 530 to stop rotating. The second preset number of winding turns is less than or equal to the number of winding turns corresponding to the maximum winding capacity of the drum 400.

[0078] In other words, when the actual working power of the operating machinery is less than the preset heavy-load working power, the cable winding state can be controlled based on the actual working position of the operating machinery. For example, in this condition, when the operating machinery moves away from the external power source, the cable is unwound. During the unwound process, it is necessary to ensure that the minimum number of cable turns on the drum 400 is greater than the first preset number of turns. Specifically, the minimum number of cable turns can be set to 2i. This prevents the cable from being pulled apart or reversed. As another example, in this condition, when the operating machinery moves closer to the external power source, the cable is wound up. During the winding process, it is necessary to ensure that the maximum number of turns on the drum 400 is within the current maximum winding capacity of the drum 400. This prevents the cable from falling off the edge of the drum 400.

[0079] A second aspect of the present invention provides a cable cooling and winding control device, comprising:

[0080] The first detection module is used to detect the operating conditions of the machinery.

[0081] The second detection module is used to detect the number of cable winding layers on the reel 400;

[0082] Control module 540 is used to control the number of cable winding layers of drum 400 based on the working conditions of the operating machinery.

[0083] For example, when the lower carriage 100 and the upper carriage 200 are in operation, the corresponding rotary motors will rotate, and the operation status of the lower carriage 100 and the upper carriage 200 can be detected using speed sensors. When the working device 300 is in operation, the corresponding rotary motor or hydraulic cylinder will rotate or extend / retract. When the working device 300 is a rotary motor, the operation status of the working device 300 can be detected using speed sensors; when the working device 300 is a hydraulic cylinder, the operation status of the working device 300 can be detected using displacement sensors.

[0084] A third aspect of the present invention provides a working machine that controls the temperature and winding / unwinding state of a cable using the cable cooling and winding / unwinding control method described above, or includes the cable cooling and winding / unwinding control device described above.

[0085] For example, in one embodiment of the invention, such as Figure 1 , Figure 2 and Figure 4As shown, the aforementioned operating machinery includes an excavator. The excavator includes a lower carriage 100, an upper carriage 200, a working device 300, a drum 400, a cable guide 510, a limit switch 520, a drive sprocket, a cable, and a motor 530. The motor 530 drives the drum 400 to rotate, and the drum 400 is used to wind up the cable. The cable provides power to the motor 530, the upper carriage 200, the lower carriage 100, and the working device 300. The cable guide 510 is connected to the drum 400 via the drive sprocket, and the drum 400 can drive the cable guide 510 to rotate via the drive sprocket. The limit switch 520 is connected to the cable guide 510 and can detect the number of rotations of the cable guide 510, thereby determining the number of cable turns wound on the drum 400. The control module 540 can also control the working status of the upper carriage 200, the lower carriage 100, and the working device 300.

[0086] In addition, the operating machinery may also include an alarm device 550. For example, when the operating machinery is under heavy load, if the number of cable winding layers on the drum 400 exceeds the preset number of heat dissipation winding layers, the alarm device 550 can be triggered first. Based on the operating status of the alarm device 550, the control module 540 then controls the operating status of the motor 530 to ensure that the number of cable winding layers on the drum 400 is less than or equal to the preset number of heat dissipation winding layers under this operating condition. The alarm device 550 includes, but is not limited to, an audible and visual alarm.

[0087] It should be noted that the above embodiments are merely illustrative examples of the present invention and do not constitute any limitation on the present invention. Any operating machinery that controls the temperature and winding / unwinding of a cable using the cable cooling and winding / unwinding control method described above, or that includes the cable cooling and winding / unwinding control device described above, should be within the protection scope of the present invention.

[0088] Furthermore, in the working machinery provided by the present invention, since the temperature and winding state of the cable are controlled by the cable cooling and winding control method described above, it also has the advantages described above.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling cable cooling and retraction, characterized in that, Includes the following steps: When the machinery is operating under heavy load, the number of cable winding layers on the control drum is less than or equal to the preset number of heat dissipation winding layers. The heavy-load operation condition refers to the working device of the operating machinery operating independently, or the working device of the operating machinery operating simultaneously with at least one of the upper and lower parts of the operating machinery. The cable cooling and winding control method also includes: When the operating machinery is under light load, when laying out the cable, the minimum number of winding turns on the control drum is greater than or equal to a first preset number of winding turns; when winding the cable, the maximum number of winding turns on the control drum is less than or equal to a second preset number of winding turns. The light-load operation condition refers to the condition where the working device of the operating machinery is in a non-operating state.

2. The cable cooling and winding control method according to claim 1, characterized in that, The cable cooling and winding control method also includes: When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the operating power of the operating machinery.

3. The cable cooling and winding control method according to claim 2, characterized in that, The cable cooling and winding control method also includes: When the actual temperature of the cable is less than or equal to the second preset temperature value, the original maximum working power of the operating machinery is restored, and the second preset temperature value is less than the first preset temperature value.

4. The cable cooling and retraction control method according to any one of claims 1 to 3, characterized in that, The step of controlling the number of cable winding layers on the drum to be less than or equal to the preset number of heat dissipation winding layers when the operating machinery is under heavy load includes: When the operating machinery is under heavy load and winding cables, if the limit switch detects that the actual number of turns of the cable is greater than the number of turns corresponding to the preset number of heat dissipation winding layers, it will control the motor to stop rotating. When the working machinery is under heavy load and laying cables, if the limit switch detects that the actual number of cable windings is greater than the number of windings corresponding to the preset number of heat dissipation winding layers, the motor will be controlled to continue rotating.

5. The cable cooling and winding control method according to claim 2 or 3, characterized in that, The step of reducing the working power of the operating machinery when the actual temperature of the cable is greater than or equal to the first preset temperature value specifically includes: When the actual temperature of the cable is greater than or equal to the first preset temperature value, reduce the displacement of the hydraulic pump in the operating machinery.

6. The cable cooling and retraction control method according to claim 3, characterized in that, The values ​​of the first preset temperature and the second preset temperature are determined based on the third preset temperature: First preset temperature = C1% × Third preset temperature; Second preset temperature = C2% × Third preset temperature; The third preset temperature is the maximum safe operating temperature of the cable.

7. The cable cooling and winding control method according to claim 1, characterized in that, The step of controlling the minimum number of winding turns of the reel to be greater than or equal to the first preset number of winding turns when laying out the cable specifically includes: When laying out the cable, if the limit switch detects that the number of rotations of the cable guide is less than the first preset number of winding turns, it controls the motor to stop rotating. The first preset number of winding turns is 2i, where i is the transmission ratio of the transmission sprocket between the drum and the cable guide. The step of controlling the maximum number of winding turns of the drum to be less than or equal to the second preset number of winding turns when winding the cable specifically includes: When the limit switch detects that the number of rotations of the cable guide is greater than the second preset number of winding turns, it controls the motor to stop rotating. The second preset number of winding turns is less than or equal to the number of winding turns corresponding to the maximum winding capacity of the drum.

8. A cable cooling and retraction control device, characterized in that, The cable cooling and winding control method for performing any one of claims 1 to 7 includes: The first detection module is used to detect the operating conditions of the machinery. The second detection module is used to detect the number of cable winding layers on the reel; The control module is used to control the number of cable winding layers on the drum based on the operating conditions of the machinery.

9. A type of operating machinery, characterized in that, The cable temperature and winding / unwinding status are controlled by the cable cooling and winding / unwinding control method according to any one of claims 1 to 7, or the method includes the cable cooling and winding / unwinding control device as described in claim 8.

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