Viscosity reduction and desorption method for crawler belt externally attached with protective film

Abstract

The invention relates to the technical field of ocean engineering deep-sea mining equipment, in particular to a track visbreaking and desorption method with an externally-attached protective film, which comprises a mine car track walking system, a track protective film, a protective film tensioning system and a jet cleaning system. The crawler belt walking system comprises a mine collecting car crawler belt and a matched car body, the crawler belt protective film comprises a mud surface lower protective film and a mud surface upper protective film, and the protective film supporting system comprises a protective film tensioning device, a protective film supporting device and a protective film guiding and monitoring device. Viscosity reduction and desorption of the deep sea mine collecting car are achieved through the externally-attached protective film by means of press-in, pulling-up, cleaning and press-in protective film circulation.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering deep-sea mining equipment, and in particular to a method for reducing adhesion and desorption of a crawler with an external protective film. Background Art

[0002] With the rapid development of industrialization, the demand for rare metals in high-tech industries such as photovoltaics and electric vehicles has increased dramatically, and land resources cannot meet the growing demand. Marine rare metal mineral resources are rich, and the development of deep-sea mineral resources is an important way to overcome the problem of resource shortage in the future.

[0003] As a kind of seabed mineral resources, seabed polymetallic nodules are cauliflower-shaped or oval-shaped. They are found 0-10cm below the surface of the soft and sparse seabed at 3000-6000 meters below the seabed. They are rich in manganese, nickel, copper and other metals. They have the advantages of high value and simple occurrence. They are one of the most valuable seabed minerals. The lifting mining system is considered to be the deep-sea mineral resource mining method with the most practical application potential. The system consists of a deep-sea ore collection vehicle, a riser and a mining ship. Among them, the ore collection vehicle usually adopts a crawler-type walking device to adapt to the soft and sparse seabed. The polymetallic nodules scattered on the seabed are collected through the ore collection system. The collected nodules are transported to the relay station through a connecting hose for crushing and processing, and the nodules are lifted to the mining ship through the riser and the ore lifting device.

[0004] The soft and thin seabed is a natural sediment deposit. Its special properties such as high water content and low strength make it very sticky. All previous tests have found that a large amount of deep-sea bottom soil adheres to the track grouser of the mining vehicle's walking chassis, which reduces the effective action depth of the track grouser, seriously affecting the driving performance of the mining vehicle on the soft and thin seabed soil, and thus affecting the collection efficiency of nodules. Therefore, it is necessary to use certain means to reduce the adhesion of the deep-sea soft and thin seabed soil to the track grouser of the mining vehicle during the driving of the crawler mining vehicle.

[0005] Based on the above practical problems, existing patents and technologies have made certain designs for the corresponding deep-sea mining walking device to reduce viscosity and desorption, but there are still problems: in existing patents and technologies, the problem of reducing viscosity and desorption relies on external devices such as jet devices acting on the tracks, which often have problems such as poor viscosity reduction effect or cause greater environmental disturbances. Summary of the invention

[0006] Based on the above, the present invention proposes a method for reducing adhesion and desorption of tracks with external protective films in order to overcome the shortcomings of the prior art. The method controls the tension state of the protective film according to real-time data through the protective film control system, and the entire track walking-protective film control-jet system cooperates with each other to effectively prevent the adhesion of deep-sea sediments on the tracks of deep-sea mining vehicles.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a method for reducing adhesion and desorption of tracks with an external protective film, including a mining vehicle running device, a mining vehicle protective film device, a mining vehicle operating support device, and a jet cleaning device. The mining vehicle running device includes a mining vehicle body, a supporting sprocket, a guide wheel, a mining vehicle track tensioning device, a mining vehicle track frame, a driving wheel, a supporting wheel, and a mining gear; the mining vehicle track protective film device, i.e., an external protective film, includes a protective film on the mud surface and a protective film under the mud surface; the protective film support device includes a protective film support device, a protective film tensioning device, and a protective film guiding and monitoring device; the jet cleaning device includes a water pump, a pressure controller, a solenoid valve, and a jet nozzle.

[0008] Furthermore, the mining vehicle travel system includes a mining vehicle body and a crawler system. The crawler system is a double crawler type, located under the vehicle body, and is responsible for the mining vehicle travel task. Its working mode is that the driving wheel provides driving force, and the supporting wheel moves forward on the lower crawler track under the guidance of the guide wheel and the control of the tensioning device, and drives the vehicle body to move through the crawler frame, and the supporting sprocket wheel supports the upper crawler to make it run horizontally.

[0009] Furthermore, the track protective film device is an external protective film, which relies on the protective film support device to go around the track. It can be divided into a protective film on the mud surface and a protective film under the mud surface according to the working conditions. The protective film on the mud surface is supported and controlled by the protective film support device, the protective film tensioning device and the protective film intelligent control device. The protective film under the mud surface fits the track to isolate the sediment. Its material can be carbon fiber or polymer material (such as polyurethane PU), its thickness is 10-15mm, which can be determined according to the specific geological conditions of the seabed and the track parameters, the width is the same as the track width or slightly larger than the track width, and the length is 3-3.5 times the track length.

[0010] Furthermore, the protective film support device includes a protective film support device, a protective film tensioning device and a protective film guiding and monitoring device. The protective film support device is located at the lower rear and middle lower part of the ore collecting vehicle body, and is a rotating shaft device fixed on the vehicle body. After the protective film is removed from the protective film, it bypasses the device and is connected to the protective film tensioning device; the protective film tensioning device is located at the lower front part of the ore collecting vehicle body, and includes a first idle roller, a tensioning roller and a second idle roller, wherein the first idle roller and the second idle roller are fixed position reels, which provide guidance and support for the protective film entering and exiting the device, and the tensioning wheel is a reel fixed on a vertical track, and its position is modified in real time according to the data transmitted to the central processor by the protective film guiding and monitoring device to increase or reduce the tensioning force; the protective film guiding and monitoring device is located in front and rear of the crawler, and is an arc plate structure, which can guide the protective film to fit with the crawler, and at the same time, its built-in pressure sensor can monitor the tension of the protective film in real time and transmit the data to the central processor of the protective film tensioning device.

[0011] Furthermore, the jet cleaning device is located at the rear of the mining truck body. The water pump, pressure controller and geomagnetic valve are arranged in the truck body, the water pump port is at the rear of the truck body to pump seawater, the jet nozzle is located at the rear and lower part of the truck body, and the jet head is at a 45° angle to the protective film.

[0012] The specific steps are as follows:

[0013] Step (1) The deep-sea ore collecting vehicle moves on the soft and sparse bottom of the seabed by means of a crawler device. During the movement of the crawler device, the driving wheel provides driving force, and the supporting wheel moves forward on the lower crawler track under the guidance of the guide wheel and the control of the tensioning device, and drives the vehicle body to move through the crawler frame, and the supporting sprocket wheel supports the upper crawler to make it run horizontally.

[0014] Step (2) The protective film is wound around the crawler track for one cycle, and is fixed and cooperates with the crawler track through the protective film support device, the protective film tensioning device and the protective film guide and monitoring device. When the mining vehicle is walking on the seabed, the protective film will bypass the protective film guide and monitoring device. The built-in pressure sensor of the protective film guide and monitoring device monitors the state of the protective film in real time. The real-time data is processed by the central processing unit to judge the tension state and attachment posture of the protective film, and the protective film tensioning device is controlled in real time to adjust the state of the protective film. The specific adjustment method is that when the protective film passes through the tensioning device, it will bypass the first idle roller, the tensioning roller and the second idle roller in turn. When the data provided by the protective film guide and monitoring device shows that the protective film is too tight, the tensioning roller will move along the tensioning roller track to the direction close to the center line of the first idle roller and the second idle roller; when the data provided by the protective film guide and monitoring device shows that the protective film is too loose, the tensioning roller will move along the tensioning roller track to the direction away from the center line of the first idle roller and the second idle roller.

[0015] Step (3) The protective film is fitted with the corresponding grouser, and is pressed into the sediment when the grouser cuts into the sediment, and is tightly fitted with the grouser and the track. The protective film and the track simultaneously enter the sediment depression and shearing state, and are removed synchronously with the grouser when the corresponding grouser cuts out the sediment.

[0016] Step (4) After the protective film is separated from the sediment, it will be connected to the protective film support device through the guidance of the protective film guide and monitoring device. The protective film support device and the protective film tensioning device will tension and correct its posture to prevent it from sticking to the track or being unable to separate from the sediment. The protective film will first separate from the track and fit with the protective film guide and monitoring device until it is pulled up by the protective film support device and forms a 45° angle with the jet nozzle; thereafter, it will be connected to the protective film tensioning device via the protective film support device shaft, 5-10 cm away from the upper track and kept parallel; thereafter, it will fit with the protective film guide and monitoring device via the protective film tensioning device. This control process will continue from the time the protective film separates from the sediment until the protective film is again attached to the protective film monitoring device and cuts into the sediment.

[0017] Step (5) The jet device pumps seawater into the jet device through a water pump, and controls the jet water pressure at 15-20 MPa through a pressure booster. The protective film pulled up by the supporting device is cleaned through a jet nozzle to rinse off the sediment attached to the protective film.

[0018] In step (6), each time the protective film and the grouser are pressed into the sediment by the crawler, no sediment is attached, thereby improving the walking performance of the mining vehicle.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention has carried out device design and method transformation on the mainstream debonding method (jet debonding) of deep-sea ore collecting vehicles. In view of the problems faced by the existing jet debonding, such as poor debonding effect, high water pressure required for debonding, and large environmental disturbance caused by debonding, a new debonding method is proposed, which greatly reduces the water pressure required for the jet (reduced by more than 80%), greatly reduces the disturbance of debonding to the environment, and greatly improves the debonding effect:

[0021] 2. The present invention fully considers the physical and chemical properties of deep-sea sediments and the complex and fragile environment of the deep sea, comprehensively considers the vehicle mechanical characteristics of the crawler vehicle, and achieves "0" impact and "0" burden on the deep-sea environment and the traveling performance of the mining vehicle through the protective film cycle of pressing-pulling-cleaning-pressing.

[0022] 3. The present invention fully considers the specific working conditions, monitors the tension state of the protective film in real time and autonomously controls the tension force of the protective film, thereby realizing real-time intelligent control of the protective film system and having extremely strong autonomous adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall system of the track adhesion reduction and desorption device and the external protective film according to the present invention;

[0025] Figure 2 A side view of the present invention;

[0026] Figure 3 It is a detailed front view of the present invention;

[0027] Figure 4 It is a detailed front and rear view of the present invention;

[0028] Figure 5 A detailed diagram of the protective film tensioning device of the present invention;

[0029] Figure 6 It is a working schematic diagram of the jet system of the present invention.

[0030] Description of reference numerals:

[0031] 1. Travel device of the ore collecting vehicle; 2. Protective film device of the crawler track; 3. Protective film operation support device; 4. Jet cleaning device; 101. Car body of the ore collecting vehicle; 102. Supporting chain wheel; 103. Guide wheel; 104. Track tensioning device; 105. Track frame; 106. Driving wheel; 107. Support wheel; 108. Grouser; 201. Protective film on the mud surface; 202. Protective film under the mud surface; 301. Protective film support device; 302. Protective film tensioning device; 303. First idle roller; 304. Tensioning roller; 305. Second idle roller; 306. Tensioning roller track; 307. Protective film guiding and monitoring device; 401. Water pump; 402. Pressure controller; 403. Solenoid valve; 404. Jet nozzle. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the implementation examples of this application to clearly and completely describe the scheme in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all of the embodiments. Based on the embodiment of this application, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of this application.

[0033] The structures, sizes, proportions, etc. in the drawings of this specification are used to match the contents shown in this specification, and are provided to relevant persons familiar with the present technology for understanding and reading, rather than to stipulate various limiting conditions of the invention, so they do not have practical significance. Any structural adjustment, size change, and proportional relationship change, as long as it does not affect the efficacy of the present invention, should be included in the scope of the present invention. At the same time, the various words "behind the vehicle" and so on used in this specification to define the position are for the convenience of description, rather than to fix their corresponding positions and implementation scopes, and to adjust their relative relationships. In the absence of changes to the substantive technology, they should be regarded as the scope of the present invention, and the selection of various protective film materials is not stipulated.

[0034] Reference Figures 1 to 6The technical solution adopted by the present invention is to provide a method for reducing adhesion and desorption of tracks with an external protective film, including a mining vehicle traveling device 1, a crawler protective film device 2, a protective film operation support device 3, and a jet cleaning device 4. The mining vehicle traveling device 1 includes a mining vehicle body 101, a supporting sprocket wheel 102, a guide wheel 103, a crawler tensioning device 104, a crawler frame 105, a driving wheel 106, a supporting wheel 107, and a grouser 108; the crawler protective film device 2, that is, the external protective film, includes a protective film 201 on the mud surface and a protective film 202 under the mud surface; the protective film support device includes a protective film support device 301, a protective film tensioning device 302, and a protective film guiding and monitoring device 307; the jet cleaning device 4 includes a water pump 401, a pressure controller 402, a solenoid valve 403, and a jet nozzle 404.

[0035] Furthermore, the mining vehicle travel system includes a mining vehicle body 101 and a crawler system. The crawler system is a double crawler type, located under the vehicle body, and is responsible for the mining vehicle travel task. Its working mode is that the driving wheel 106 provides driving force, and the supporting wheel moves forward on the lower crawler track under the guidance of the guide wheel 103 and the control of the tensioning device, and drives the vehicle body to move through the crawler frame 105, and the supporting chain wheel 102 supports the upper crawler to make it run horizontally.

[0036] Furthermore, the track protective film device 2 is an external protective film, which relies on the protective film support device to go around the track. It can be divided into a protective film 201 on the mud surface and a protective film 202 under the mud surface according to the working conditions. The protective film 201 on the mud surface is supported and controlled by the protective film support device 301, the protective film tensioning device 302 and the protective film intelligent control device. The protective film 202 under the mud surface is attached to the track to isolate sediments. Its material can be carbon fiber or polymer material (such as polyurethane PU), its thickness is 10-15mm, which can be determined according to the specific geological conditions of the seabed and the track parameters, the width is the same as the track width or slightly larger than the track width, and the length is 3-3.5 times the track length.

[0037] Furthermore, the protective film supporting device includes a protective film supporting device 301 , a protective film tensioning device 302 and a protective film guiding and monitoring device 307 . The protective film supporting device 301 is located at the lower rear and middle part of the ore collecting vehicle body and is a rotating shaft device fixed on the vehicle body. After the protective film is removed from the protective film, it bypasses the device and is connected to the protective film tensioning device 302; the protective film tensioning device 302 is located at the lower front of the ore collecting vehicle body 101, and includes a first idle roller 303, a tensioning roller 304 and a second idle roller 305, wherein the first idle roller 303 and the second idle roller 305 are fixed position reels, which provide guidance and support for the protective film entering and exiting the device, and the tensioning wheel is a reel fixed on a vertical track, and its position is corrected in real time according to the data transmitted to the central processor by the protective film guiding and monitoring device 307 to increase or reduce the tensioning force; the protective film guiding and monitoring device 307 is located in front and rear of the crawler, and is an arc plate structure, which can guide the protective film to fit with the crawler, and at the same time, its built-in pressure sensor can monitor the tension of the protective film in real time and transmit the data to the central processor of the protective film tensioning device 302.

[0038] like Figures 1 to 6 As shown, further, the jet cleaning device 4 is located behind the mining vehicle body 101. The water pump 401, the pressure controller 402 and the geomagnetic valve are arranged in the vehicle body, the water pump 401 is at the rear of the vehicle body to pump seawater, the jet nozzle 404 is located at the rear and lower part of the vehicle body, and the jet head is at an angle of 45° with the protective film.

[0039] Step (1) The deep-sea ore collecting vehicle moves on the soft and sparse bottom of the seabed by means of a crawler device. During the movement of the crawler device, the driving wheel 106 provides driving force. Under the guidance and control of the guide wheel 103 and the crawler tensioning device 104, the supporting wheel 107 moves forward on the lower crawler track and drives the vehicle body 101 to move through the crawler frame 105. The supporting sprocket wheel 102 supports the upper crawler to enable it to run horizontally.

[0040] Step (2) The protective film 2 goes around the crawler track once, and is fixed and cooperates with the crawler track through the protective film support device 301, the protective film tensioning device 302 and the protective film guiding and monitoring device 307. When the mining vehicle is moving on the seabed, the protective film 2 will bypass the protective film guiding and monitoring device 307. The built-in pressure sensor of the protective film guiding and monitoring device 307 monitors the state of the protective film in real time. The real-time data is processed by the central processor to determine the tension state and attachment posture of the protective film, and the protective film tensioning device 302 is controlled in real time to adjust the state of the protective film. The specific adjustment method is that when the protective film passes through the tensioning device 302, it will bypass the first idle roller 303, the tensioning roller 304 and the second idle roller 305 in sequence. When the data provided by the protective film guiding and monitoring device 307 shows that the protective film is too tight, the tensioning roller 304 will move along the tensioning roller track 306 toward the direction of the center line of the first idle roller 303 and the second idle roller 305; when the data provided by the protective film guiding and monitoring device 307 shows that the protective film is too loose, the tensioning roller 304 will move along the tensioning roller track 306 away from the center line of the first idle roller 303 and the second idle roller 305.

[0041] Step (3) The protective film is fitted with the corresponding grouser 108, and is pressed into the sediment when the grouser cuts into the sediment, and is tightly fitted with the grouser and the track. The protective film 2 and the track simultaneously enter the sediment depression and shearing state, and are removed synchronously with the grouser when the corresponding grouser 108 cuts out the sediment.

[0042] Step (4) After the protective film is separated from the sediment, it will be connected to the protective film support device 301 through the guidance of the protective film guide and monitoring device 307. The protective film support device 301 and the protective film tensioning device 302 will tension and correct its posture to prevent it from sticking to the track or being unable to separate from the sediment. The protective film will first separate from the track and fit with the protective film guide and monitoring device 307 until it is pulled up by the protective film support device 301 and forms a 45° angle with the jet nozzle 404; thereafter, it will be connected to the protective film tensioning device 302 via the rotating shaft of the protective film support device 301, and will be 5-10 cm away from the upper track and maintained in a parallel state; thereafter, it will fit with the protective film guide and monitoring device 307 via the protective film tensioning device 302. This control process will continue from the protective film separating from the sediment until the protective film is again fitted with the protective film monitoring device and cuts into the sediment.

[0043] Step (5) The jet device 4 pumps seawater into the jet device 4 through the water pump 401, controls the jet using the solenoid valve 403, controls the jet water pressure at 3-5 MPa via the pressure controller 402, cleans the protective film pulled up by the supporting device 301 through the jet nozzle, and rinses away the sediment attached to the protective film.

[0044] In step (6), each time the protective film and the grouser are pressed into the sediment by the crawler, no sediment is attached to them, thereby improving the walking performance of the ore collecting vehicle.

Claims

1. A method for reducing adhesion and desorption of a track with an external protective film, characterized in that: It includes a mining vehicle traveling device, a crawler protective film device, a protective film operation support device, and a jet cleaning device. The mining vehicle traveling device includes a mining vehicle body, a supporting chain wheel, a guide wheel, a crawler tensioning device, a crawler frame, a driving wheel, a supporting wheel, and a grouser; the crawler protective film device includes a protective film on the mud surface and a protective film under the mud surface; the protective film support device includes a protective film supporting device, a protective film tensioning device, and a protective film guiding and monitoring device; the jet cleaning device includes a water pump, a pressure controller, a solenoid valve, and a jet nozzle.

2. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 1, characterized in that: The traveling system of the ore collecting vehicle comprises a vehicle body and a crawler system. The crawler system is a double crawler type, located under the vehicle body, and is responsible for the traveling task of the ore collecting vehicle. Its working mode is that the driving wheel provides driving force, and the supporting wheel moves forward on the lower crawler track under the guidance of the guide wheel and the control of the tensioning device, and drives the vehicle body to move through the crawler frame, and the supporting sprocket wheel supports the upper crawler to make it run horizontally.

3. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 1, characterized in that: The track protective film device is an external protective film, which relies on the protective film support device to wrap around the track. It can be divided into a protective film on the mud surface and a protective film under the mud surface according to the working conditions. The protective film on the mud surface is supported and controlled by a protective film support device, a protective film tensioning device and a protective film intelligent control device. The protective film under the mud surface fits the track to isolate the sediment; its material can be carbon fiber or polymer material, its thickness is 10 to 15 mm, which can be determined according to the specific geological conditions of the seabed and the track parameters, the width is the same as the track width or greater than the track width, and the length is 3 to 3.5 times the track length.

4. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 1, characterized in that: The protective film supporting device comprises a protective film supporting device, a protective film tensioning device and a protective film guiding and monitoring device; wherein the protective film supporting device is located at the rear lower part and the middle lower part of the ore collecting vehicle body, and is a rotating shaft device fixed on the vehicle body. After the protective film is released from the protective film, it bypasses the device and is connected to the protective film tensioning device; the protective film tensioning device is located at the front lower part of the ore collecting vehicle body, and comprises a first idle roller, a tensioning roller and a second idle roller, wherein the first idle roller and the second idle roller are fixed position reels, which provide guidance and support for the protective film entering and exiting the device, and the tensioning wheel is a reel fixed on a vertical track, and its position is corrected in real time according to the data transmitted to the central processor by the protective film guiding and monitoring device to increase or reduce the tensioning force; the protective film guiding and monitoring device is located in front and rear of the crawler, and is an arc plate structure, which can guide the protective film to fit with the crawler, and at the same time, its built-in pressure sensor can monitor the tensioning condition of the protective film in real time and transmit the data to the central processor of the protective film tensioning device.

5. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 1, characterized in that: The jet cleaning device is located at the rear of the mining truck body. The water pump, pressure controller and geomagnetic valve are arranged in the truck body. The water pump port is at the rear of the truck body to pump seawater. The jet nozzle is located at the rear and lower part of the truck body. The jet head forms a 45° angle with the protective film.

6. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 1, characterized in that: The specific steps are as follows: Step (1) The deep-sea ore collecting vehicle moves on the soft and sparse bottom of the seabed by means of a crawler device. During the movement of the crawler device, the driving wheel provides driving force, and the supporting wheel moves forward on the lower crawler track under the guidance of the guide wheel and the control of the tensioning device, and drives the vehicle body to move through the crawler frame, and the supporting sprocket wheel supports the upper crawler to make it run horizontally; Step (2) The protective film goes around the crawler track for one cycle, and is fixed and cooperates with the crawler track through the protective film supporting device, the protective film tensioning device and the protective film guiding and monitoring device; when the ore collecting vehicle is moving on the seabed, the protective film will bypass the protective film guiding and monitoring device, and the built-in pressure sensor of the protective film guiding and monitoring device will monitor the state of the protective film in real time. The real-time data is processed by the central processing unit to determine the tensioning state and attachment posture of the protective film, and the protective film tensioning device will be controlled in real time to adjust the state of the protective film; Step (3) the protective film is fitted with the corresponding grouser, pressed into the sediment when the grouser cuts into the sediment, and is tightly fitted with the grouser and the crawler, the protective film and the crawler synchronously enter the sediment depression and shearing state, and are synchronously removed with the grouser when the corresponding grouser cuts out the sediment; Step (4) After the protective film is detached from the sediment, it will be guided by the protective film guiding and monitoring device and connected to the protective film supporting device. The protective film supporting device and the protective film tensioning device will tension and correct its posture to prevent it from sticking to the track or being unable to detach from the sediment; the protective film will first detach from the track and adhere to the protective film guiding and monitoring device until it is pulled up by the protective film supporting device and forms a 45° angle with the jet nozzle; thereafter, it will be connected to the protective film tensioning device via the protective film supporting device shaft, 5 to 10 cm away from the upper track and maintained in a parallel state; thereafter, it will adhere to the protective film guiding and monitoring device via the protective film tensioning device; this control process will continue from the time the protective film detaches from the sediment until the protective film is again adhered to the protective film monitoring device and cuts into the sediment. Step (5) The jet device pumps seawater into the jet device through a water pump, and the jet water pressure is controlled at 15 to 20 MPa through a pressure booster, and the protective film pulled up by the supporting device is cleaned through the jet nozzle to rinse off the sediment attached to the protective film; In step (6), each time the protective film and the grouser are pressed into the sediment by the crawler, no sediment is attached, thereby improving the walking performance of the mining vehicle.

7. The method for reducing adhesion and desorption of a track with an external protective film as claimed in claim 6, characterized in that: In step (1), the protective film tensioning device is controlled to adjust the state of the protective film. The specific adjustment method is that when the protective film passes through the tensioning device, it will bypass the first idle roller, the tensioning roller and the second idle roller in sequence. When the data provided by the protective film guiding and monitoring device shows that the protective film is too tight, the tensioning roller will move along the tensioning roller track toward the direction of the center line of the first idle roller and the second idle roller; when the data provided by the protective film guiding and monitoring device shows that the protective film is too loose, the tensioning roller will move along the tensioning roller track away from the center line of the first idle roller and the second idle roller.

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