Cable protection device for hydroelectric power generation

Abstract

The invention discloses a cable protection device for hydroelectric power generation, and relates to the technical field of electric power facility protection, the cable protection device comprises a rack, a monitoring mechanism, an accumulated snow cleaning mechanism, an icebreaking mechanism, a rotary cutting mechanism and a walking mechanism, the inner side of the rack is also provided with a snow removing mechanism at the rear side of the accumulated snow cleaning mechanism, and the two side surfaces of the rack are also provided with photovoltaic panels; a V-shaped groove wheel lateral clamping design is adopted, ice nodule clamping stagnation is avoided, the device is suitable for a large-gradient cable, the limiting protection mechanism can prevent the cable from being excessively lifted during operation, in addition, the limiting protection mechanism can be used for protecting the cable from being lifted, and the cable is prevented from being damaged. According to the ice breaking device, the modes of mechanical extrusion, rotary cutting, heat energy assistance, ultrasonic resonance and the like are fused, the integrated design is achieved, the ice breaking device can adapt to various ice types, ice condition recognition and ice breaking force closed-loop control can be achieved through fusion of multiple sensors, and therefore efficient snow or ice removal on the cable is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power facility protection, in particular to a cable protection device for water power generation. BACKGROUND

[0002] The power transmission line cable is a cable product for transmitting high-voltage power, including low-voltage cable, high-voltage cable, overhead insulated cable, etc., and its main function is to transmit high-voltage power generated by water power to a substation or directly supply to users. Since the cable is erected in the air and is only supported by the tower, it is easily affected by ice and snow. Rain and snow weather can cause the cable to accumulate rain and snow or ice, increasing the weight of the cable, which may cause the cable to be crushed.

[0003] In the operation of hydropower stations in cold regions, ice accumulation on power transmission cables is a major hidden danger to the safety of power transmission. The high humidity environment specific to hydropower stations makes the cable more prone to form complex ice, mainly including: Graupel ice: transparent ice layer formed by supercooled rainwater freezing at temperatures of-1 to-3℃, with a density of 0.6-0.9g / cm³; Fog ice: opaque ice crystals formed by fog droplets freezing below-5℃; Mixed ice: layered structure formed by alternating rain and fog.

[0004] The traditional deicing methods have obvious shortcomings: Thermal ice melting method (such as current heating cable): high energy consumption, accounting for 3%~8% of power generation, only suitable for thin ice, and long-term use accelerates cable aging; Mechanical vibration method (such as motor-driven knocking device): complex structure, easy to damage cable insulation, poor effect on breaking dense ice layer; Chemical coating method: needs to be regularly recoated with anti-icing coating, poor environmental protection, and fails quickly in high-altitude low-temperature environment.

[0005] Unmanned aerial vehicle deicing: relies on manual operation, cannot work in bad weather, low efficiency and high cost.

[0006] The existing technology has problems such as high energy consumption, damage to the cable, and poor environmental adaptability, and there is an urgent need to develop a self-adaptive, low-damage, and high-efficiency deicing device for the special environment of hydropower stations. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides a cable protection device for water power generation, which solves the problems raised in the above background art.

[0008] To achieve the above purpose, the present application is realized by the following technical scheme: the cable protection device for water power generation, comprising a rack, further comprising: A monitoring mechanism is fixed on the front side of the frame by a support; A snow clearing mechanism is installed on the inner side of the front end of the frame, and a snow removing mechanism is arranged on the inner side of the frame at the rear side of the snow clearing mechanism, and the snow removing mechanism cooperates with the snow clearing mechanism to form a resonance snow removing effect for removing the snow on the surface of the cable; An ice breaking mechanism is arranged on the inner side of the frame at the rear of the snow removing mechanism for extruding and breaking the ice layer on the surface of the cable; A rotary cutting mechanism is installed on the inner side of the frame at the rear of the ice breaking mechanism for rotating and cutting the ice slide on the cable; A walking mechanism is arranged on the rear side of the frame and laterally clamped on the cable for moving the whole device; In addition, photovoltaic panels are installed on the two side surfaces of the frame, and a power control box is installed on the rear bottom end of the frame, and a limit protection mechanism is arranged on the rear side of the frame.

[0009] As a further technical scheme of the present application, the monitoring mechanism comprises an ice thickness monitoring sensor and an adaptive controller, and the ice thickness monitoring sensor adopts an integrated millimeter wave radar and an infrared thermal imager.

[0010] As a further technical scheme of the present application, the snow clearing mechanism comprises two cleaning motors installed on the inner bottom side of the front end of the frame, and a connecting rod is connected to the output end of each cleaning motor, and a cleaning brush is fixed on the top end of the connecting rod, and the two cleaning brushes are staggered on the two sides of the cable. The cleaning brush adopts nylon and stainless steel wire composite bristles, and the nylon bristles and the stainless steel wire are staggered. The surface of the cleaning brush is coated with a PTC thermosensitive ceramic coating, and the PTC thermosensitive ceramic coating is coated on the base surface of the bristles.

[0011] As a further technical scheme of the present application, the ice breaking mechanism comprises a lower fixed plate installed on the inner bottom side of the frame and an upper fixed plate installed on the top side of the frame, the bottom surface of the upper fixed plate is fixed with an upper clamping plate, one end of the upper fixed plate is hinged to the top side of one side of the frame, and the other end is fixed to the top side of the other side of the frame through bolts; Two hydraulic push rods are symmetrically installed on the upper end of the lower fixed plate, and two guide rods are vertically installed on the upper end of the lower fixed plate near the two hydraulic push rods, and the extension ends of the two hydraulic push rods are connected with a lower clamping plate, and the two guide rods penetrate through the two ends of the lower clamping plate and are slidably connected therewith; The lower surface of the upper clamping plate and the upper surface of the lower clamping plate are uniformly arrayed with sawtooth protrusions, the sawtooth protrusions adopt a hard alloy base body, and the surface is laser cladded with a WC-Co coating, and the surface of the lower clamping plate is also arrayed with ice outlet holes.

[0012] As a further technical scheme of the present application, the snow removing mechanism comprises a positioning plate installed at the middle part of the upper end of the upper fixed plate, and two positioning racks are symmetrically installed at the two sides of one end of the positioning plate, and a limiting roller is rotatably connected below the positioning plate between the two positioning racks. The outer sides of the two positioning racks are also symmetrically connected with two obliquely arranged scraper racks, and the bottom ends of the two scraper racks are jointly connected with a scraper, and the upper end of the scraper is installed with a vibration motor.

[0013] As a further technical scheme of the present application, the rotary cutting mechanism comprises two push plates installed on the inner walls of the two sides of the frame, and a differential ice breaking wheel is jointly connected between the two fixed cross bars symmetrically installed on the upper and lower ends of one side of each push plate, and the differential ice breaking wheel is rotatably connected with the fixed cross bar, and a differential motor is installed at one end of the fixed cross bar at the bottom end of the differential ice breaking wheel, and the differential motor is fixedly connected with the fixed cross bar, and the output end of the differential motor is connected with the differential ice breaking wheel. A temperature compensation heating sheet is installed on the inner wall of the differential ice breaking wheel, and an ultrasonic generator is also installed on the top end shaft of the differential ice breaking wheel. The diameters of the two differential ice breaking wheels are in a ratio of 1:1.5.

[0014] As a further technical scheme of the present application, the two push plates and the frame are connected through an adjusting assembly, and the adjusting assembly comprises: A hydraulic push rod II is installed on the outer wall of the frame, and the telescopic end of the hydraulic push rod II penetrates the middle part of the frame and is fixed with the push plate; Two limiting slide rods are symmetrically installed on the frame, and one end of each limiting slide rod penetrates the upper and lower ends of the push plate and is slidingly connected with the push plate.

[0015] As a further technical scheme of the present application, the walking mechanism comprises two groups of positioning seats symmetrically installed on the inner walls of the frame, each group of positioning seats comprises two positioning seats, two bidirectional spring rods are symmetrically installed on each positioning seat, one end of each bidirectional spring rod is connected with a fixed shaft seat, two drive wheels are symmetrically connected through four bidirectional spring rods on each group of positioning seats, and two fixed shaft seats are symmetrically distributed on the upper and lower ends of the drive wheels and are rotatably connected with the drive wheels. One drive motor is installed at the bottom end of one drive wheel on each group of positioning seats, the output end of the drive motor is connected with the drive wheel, and the drive motor is fixed on the fixed shaft seat, and the two drive motors are staggered on the two sides of the cable. The drive wheel adopts a V-shaped groove wheel, and the rim is inlaid with tungsten carbide anti-skid nails.

[0016] As a further technical solution of the present invention, the limiting protection mechanism includes a hydraulic push rod three installed in the middle of the inner side of the rear end of the frame. The telescopic end of the hydraulic push rod three is connected to a hook, and a tension sensor is also provided between the telescopic end of the hydraulic push rod three and the hook.

[0017] As a further technical solution of the present invention, the power control box is equipped with a low-temperature storage battery, a photovoltaic inverter, a wireless communication module, and a remote control unit.

[0018] This invention provides a cable protection device for hydropower generation, which has the following advantages compared with the prior art: 1. The cable protection device used for hydropower generation, through the cooperation of the walking mechanism and the limit protection mechanism, adopts a V-shaped groove wheel side clamping design to avoid ice jamming and adapt to cables with large slopes. Secondly, the limit protection mechanism can prevent the cable from being raised too much during operation.

[0019] 2. Cable protection devices for hydropower generation integrate mechanical extrusion, rotary cutting, thermal energy assistance, and ultrasonic resonance into a single design. This not only adapts to various ice types but also enables ice condition identification and closed-loop control of ice-breaking force through multi-sensor fusion, thereby achieving efficient snow or ice removal from cables. Furthermore, when equipped with photovoltaic panels, it can solve the problem of power supply difficulties in remote locations of hydropower stations. Attached Figure Description

[0020] Figure 1 This is a first structural perspective view of the present invention; Figure 2 This is a second structural perspective view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a first structural view of the walking mechanism in this invention; Figure 5 This is a second structural view of the walking mechanism in this invention; Figure 6 This is a schematic diagram of the rotary cutting mechanism in this invention; Figure 7 For the present invention Figure 6 The front view in the middle; Figure 8 This is a first structural view of the ice-breaking mechanism in this invention; Figure 9 This is a second structural view of the ice-breaking mechanism in this invention; Figure 10 This is a schematic diagram of the snow removal mechanism in this invention.

[0021] In the figure: 1, rack; 2, monitoring mechanism; 3, snow cleaning mechanism; 31, cleaning motor; 32, connecting rod; 33, cleaning brush; 4, snow removal mechanism; 41, positioning plate; 42, positioning frame; 43, limit roller; 44, scraper frame; 45, scraper; 46, vibration motor; 5, ice breaking mechanism; 51, upper fixed plate; 52, lower fixed plate; 53, hydraulic push rod one; 54, guide rod; 55, lower clamping plate; 56, upper clamping plate; 57, sawtooth convex rib; 58, ice outlet hole; 6, rotary cutting mechanism; 61, hydraulic push rod two; 62, push plate; 63, limit slide rod; 64, fixed cross bar; 65, differential ice breaking wheel; 66, differential motor; 67, ultrasonic generator; 68, temperature compensation heating sheet; 7, walking mechanism; 71, positioning seat; 72, bidirectional spring rod; 73, fixed shaft seat; 74, drive wheel; 75, drive motor; 8, limit protection mechanism; 81, hydraulic push rod three; 82, tension sensor; 83, hook; 9, photovoltaic panel; 91, power control box. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-3 The present application provides a cable protection device for water power generation technical scheme: the cable protection device for water power generation, including rack 1, further comprising monitoring mechanism 2, through the bracket fixed on the front side of rack 1, monitoring mechanism 2 includes ice thickness monitoring sensor and self-adaptive controller, ice thickness monitoring sensor adopts integrated millimeter wave radar and infrared thermal imager, self-adaptive controller is used for dynamic adjustment based on ice type identification result, adopts ARM Cortex-M7 core, runs ice type identification algorithm; As Figure 9 shown, the present application further comprises snow cleaning mechanism 3, installed in the inner side of the front end of rack 1, the inner side of rack 1 is located at the rear side of snow cleaning mechanism 3, and snow removal mechanism 4 is further arranged at the rear side of snow cleaning mechanism 3, and snow removal mechanism 4 and snow cleaning mechanism 3 cooperate to form a resonance snow removal effect, for removing the snow on the surface of the cable; The snow cleaning mechanism 3 comprises two cleaning motors 31 installed on the inner bottom of the front end of the rack 1, the output end of each cleaning motor 31 is connected with a connecting rod 32, the top end of the connecting rod 32 is fixed with a cleaning brush 33, the two cleaning brushes 33 are staggered and distributed on the two sides of the cable, the cleaning brush 33 adopts nylon and stainless steel wire composite bristles, the nylon bristles and the stainless steel wire are staggered, and the surface of the cleaning brush 33 is coated with a PTC thermosensitive ceramic coating, wherein the PTC thermosensitive ceramic coating is coated on the base surface of the bristles, it should be noted that the cleaning brush 33 can adopt but is not limited to a brush roller with a diameter of 150 mm, the nylon bristles (diameter 0.3 mm) and the stainless steel wire (diameter 0.5 mm) are staggered, and the rotating speed of the cleaning motor 31 is adjustable between 200-500 rpm; Further, as shown in Figure 10 The snow removing mechanism 4 comprises a positioning plate 41 installed on the upper end of the middle part of the upper fixed plate 51, the positioning plate 41 is symmetrically installed with a positioning frame 42 on both sides of one end, and a limiting roller 43 is rotatably connected below the positioning plate 41 between the two positioning frames 42; The outer side of the two positioning frames 42 is also symmetrically connected with an obliquely arranged scraper frame 44, the bottom end of the two scraper frames 44 is commonly connected with a scraper 45, the upper end of the scraper 45 is installed with a vibration motor 46, the scraper 45 is made of stainless steel material with a thickness of about 2 mm, and the bottom surface of the scraper 45 is designed as a concave arc in the middle part, the amplitude of the vibration motor 46 is adjustable within 3-5 mm, the frequency is 20 Hz, and the vibration motor 46 forms a resonance snow removing effect with the cleaning brush 33 during use; When the above snow cleaning mechanism 3 and snow removing mechanism 4 are applied, the cleaning motor 31 is controlled to rotate, so that the cleaning brush 33 is driven to rotate at high speed through the connecting rod 32, the PTC thermosensitive ceramic coating is powered to spontaneously heat to 50℃, so as to melt the snow particle bonding layer; at the same time, the vibration motor 46 works, so that the scraper 45 vibrates, and the resonance effect is formed with the rotation and cleaning of the cleaning brush 33, so that the snow on the surface of the cable can be stripped.

[0024] As shown in Figure 8 And 9 The ice breaking mechanism 5 is arranged on the inner side of the rack 1 and located at the rear of the snow removing mechanism 4, and is used for extruding and breaking the ice layer on the surface of the cable, the ice breaking mechanism 5 comprises a lower fixed plate 52 installed on the inner bottom of the rack 1 and an upper fixed plate 51 on the top, the middle part of the bottom surface of the upper fixed plate 51 is fixed with an upper clamping plate 56, one end of the upper fixed plate 51 is hinged to the top of one side of the rack 1, the other end is fixed to the top of the other side of the rack 1 through bolts, when the device is installed on the cable, the upper fixed frame 51 can be turned over to facilitate placing the cable on the inner side of the device, and then the upper fixed plate 51 is fixed; The upper end of the lower fixed plate 52 is symmetrically provided with two hydraulic push rods 53, and the upper end of the lower fixed plate 52 is also vertically provided with two guide rods 54 near the two hydraulic push rods 53, the extension ends of the two hydraulic push rods 53 are jointly connected with a lower clamping plate 55, the two guide rods 54 penetrate through the two ends of the lower clamping plate 55 and are slidably connected with the lower clamping plate 55, the two hydraulic push rods 53 are controlled in a synchronous mode, the lower clamping plate 55 is pushed to move close to the upper clamping plate 56 by controlling the two hydraulic push rods 53 to synchronously extend, so that the ice layer on the surface of the cable is extruded, the ice layer is bidirectionally extruded, the serrated ribs 57 generate stress concentration points on the ice surface, when the pressure reaches the compressive strength of the ice layer (about 15 MPa for rime ice), the cracks expand from the ice hole, and the whole ice layer is broken; The upper surface of the upper clamping plate 56 and the upper surface of the lower clamping plate 55 are also uniformly arrayed with serrated ribs 57, the tips of the serrated ribs 57 are arc-shaped to avoid damaging the cable, the tooth pitch can be 5-8 mm, and the height can be 3-5 mm, the serrated ribs 57 are made of a hard alloy base and are provided with a WC-Co coating layer on the surface by laser cladding, and the surface of the lower clamping plate 55 is also arrayed with ice holes 58, the inner diameter of the ice hole 58 can adapt to the falling of ice slag.

[0025] As shown in Figure 6 and 7 The rotary cutting mechanism 6 is also provided, which is installed on the inner side of the rack 1 and located at the rear of the ice breaking mechanism 5, and is used for rotating and cutting the ice on the cable, the rotary cutting mechanism 6 comprises two push plates 62 installed on the inner walls of the two sides of the rack 1, a fixed cross rod 64 is symmetrically installed on each side of each push plate 62 and at the upper and lower ends, a differential ice breaking wheel 65 is jointly connected between the two fixed cross rods 64, the differential ice breaking wheel 65 is rotatably connected with the fixed cross rod 64, a differential motor 66 is installed at one end of the fixed cross rod 64 and located at the bottom end of the differential ice breaking wheel 65, the differential motor 66 is fixedly connected with the fixed cross rod 64, and the output end of the differential motor 66 is connected with the differential ice breaking wheel 65, the diameters of the two differential ice breaking wheels 65 are in a ratio of 1:1.5, for example, the diameter of the small wheel can be 80 mm (its rotating speed is 120 rpm), and the diameter of the large wheel can be 120 mm (its rotating speed is 80 rpm); The inner wall of the differential ice breaking wheel 65 is provided with a temperature compensation heating sheet 68, which can maintain the wheel surface temperature at-5~0℃, a temperature monitoring system can be configured to facilitate controlling the wheel surface temperature according to the monitored temperature, and the top end shaft of the differential ice breaking wheel 65 is also provided with an ultrasonic generator 67, and the frequency thereof is 28-40 kHz; Two push plate 62 and rack 1 through the adjustment assembly is connected, adjustment assembly includes: hydraulic push rod two 61, installed on the outer wall of rack 1, and the telescopic end of hydraulic push rod two 61 through the rack 1 and the middle part of push plate 62 is fixed; Two limit slide rod 63, symmetrically installed on the rack 1, one end of two limit slide rod 63 all through the upper and lower end of push plate 62, and with push plate 62 sliding connection, by controlling the telescopic of hydraulic push rod two 61, can push differential ice breaking wheel 65 to the cable close, facilitate to adapt to different size cable deicing.

[0026] In use, the use of double wheel speed difference forms shear force (difference 40 rpm), can better cut into the cable ice slip base, and the work of ultrasonic generator 67, can produce ultrasonic waves to make ice crystal resonance (ice crystal inherent frequency 28-32 kHz), reduce the ice layer adhesion strength 40%, while the differential ice breaking wheel 65 in the heating piece maintains-5 DEG C working temperature, prevent ice dirt adhesion.

[0027] As shown in Figure 4 and 5 The application also includes walking mechanism 7, which is arranged at the rear side of the rack 1 and laterally clamped on the cable to drive the whole device to move. The walking mechanism 7 includes two groups of positioning seats 71 symmetrically arranged on the inner wall of the rack 1, each group of positioning seats 71 has two positioning seats 71, two bidirectional spring rods 72 are symmetrically arranged on each positioning seat 71, one end of each bidirectional spring rod 72 is connected with a fixed shaft seat 73, two drive wheels 74 are symmetrically connected to each group of positioning seats 71 through four bidirectional spring rods 72, each two fixed shaft seats 73 are symmetrically arranged on the upper and lower ends of the drive wheel 74 and are rotationally connected with the drive wheel 74, one drive wheel 74 at the bottom of each group of positioning seats 71 is provided with a drive motor 75, the output end of the drive motor 75 is connected with the drive wheel 74, and the drive motor 75 is fixed on the fixed shaft seat 73. The two drive motors 75 are staggered on the two sides of the cable. The drive motor 75 is a brushless DC motor with a rated torque of 5 N·m and is provided with a planetary gear box with a reduction ratio of 15:1. The pre-pressure of the bidirectional spring rod 72 is about 200 N, and the telescopic stroke is ±20 mm. The drive wheel 74 is a V-shaped groove wheel, the rim of the V-shaped groove wheel is 60°, and the rim is inlaid with tungsten carbide anti-skid nails. The diameter of the tungsten carbide anti-skid nail is 5-12 mm, and the protruding height is 1-2 mm, so that the adhesion force in the environment of-40 DEG C is greater than 200 N. In use, the V-shaped drive wheel 74 is tightly attached to the two sides of the cable through the lateral clamping force of the bidirectional spring rod 72, the anti-skid nails penetrate into the ice layer to provide adhesion, and then the drive motor 75 is controlled to work, so that the planetary gear box (with a reduction ratio of 15:1) outputs a torque of 5 N·m, and the device is pushed to move at a speed of 0.5-3 m / min. The rear side of the rack 1 is further provided with a limiting protection mechanism 8, wherein the limiting protection mechanism 8 comprises a hydraulic push rod three 81 installed in the middle of the inner side of the rear end of the rack 1, the telescopic end of the hydraulic push rod three 81 is connected with a hook 83, and a tension sensor 82 is further arranged between the telescopic end of the hydraulic push rod three 81 and the hook 83; before deicing, the hook 83 is hung on the cable by the extension of the hydraulic push rod three 81, and the tension sensor 82 is used to monitor the cable tension; when the cable is too high, the hydraulic push rod three 81 can be retracted, and the hook 83 is used to pull down the cable, so as to avoid damage or influence of the cable due to the cable being too high.

[0028] As shown in Figure 1 and 2 In addition, photovoltaic panels 9 are installed on the two side surfaces of the rack 1, and a power control box 91 is installed at the bottom end of the rear side of the rack 1, wherein a low-temperature storage battery, a photovoltaic inverter, a wireless communication module and a remote control unit are installed in the power control box 91; the photovoltaic panels 9 on the side surface of the rack 1 can absorb light energy and convert it into electric energy; the photovoltaic inverter and the controller are matched to convert the electric energy into electric energy to provide power for the equipment.

[0029] The working principle of the present application is as follows: in use, the cable surface is detected by the monitoring mechanism 2, the ice thickness and ice type (snow, rime ice, glaze ice, ice slide, etc.) are identified by the fusion detection of the millimeter wave radar and the infrared thermal imager; Then the snow cleaning mechanism 3 is controlled to rotate at high speed, and the PTC heat-sensitive ceramic coating is powered to generate heat to melt the snow particle bonding layer; at the same time, the scraper 45 and the vibration motor 46 of the snow removing mechanism 4 work together to realize high-frequency scraping and form a resonance effect to peel off the snow; After the snow on the surface of the cable is scraped off, the ice layer on the surface of the cable can be extruded and broken by the ice breaking mechanism 5; when the serrated protrusions 57 extrude the ice layer, stress concentration points can be generated to improve the ice layer breaking efficiency and make the ice layer break from the ice breaking hole 58; Further, the differential ice breaking wheel 65 of the rotary cutting mechanism 6 is rotated at a speed difference to form a shearing force and cut into the ice slide base; at the same time, the ultrasonic generator 67 is used to generate ultrasonic waves to make the ice crystals resonate and reduce the bonding strength, so as to realize the cutting of the ice slide; During the deicing process, the walking mechanism 7 can drive the whole device to move on the cable; the lateral clamping force of the V-shaped driving wheel 74 and the adhesion force provided by the studs can better drive the device to move on the cable.

[0030] The present application is applied in the following scenes as follows: I. Rapid deicing for typical working conditions; Application scenario: mixed ice (-25 DEG C) with a thickness of 18mm; Assembled for use: millimeter wave radar detects ice thickness of 18.2 mm, infrared identifies phase transition temperature of -1.2℃ (judged as rime ice), and then starts the medium pressure extrusion crushing mode (pressure setting 80N), that is, controls the ice breaking mechanism 5 to work, and controls the speed of the walking mechanism 7 to be 1.5 m / min; The specific steps are: (1) Ice condition recognition is completed by using millimeter wave radar and infrared thermal imager.

[0031] (2) The two hydraulic push rods 53 of the ice breaking mechanism 5 are extended to push the lower clamping plate 55 to move up by 30 mm, the sawtooth protrusions 57 are pressed into the ice layer to generate cracks, and the broken ice is dropped through the Φ5 mm ice outlet hole 58; (3) At this time, the tension sensor 82 monitors that the cable tension peak value is 95N (within the safety range); The above-mentioned effect is: the deicing rate is 99.3%, the cable surface temperature rises by only 2℃, and the insulation layer is not damaged.

[0032] II. For power transmission cable deicing operation of hydropower station dam Application scenario: winter operation environment of a pumped storage power station, cable ice type is mixed ice of rime and rime, average thickness is 25mm; Device configuration: wheel track of walking mechanism 7 is adjusted to 300mm, wheel shaft inclination angle is 12°, extrusion pressure of rotary cutting mechanism 6 is set to 150N, and the differential ratio of ice breaking wheel is 1:1.5; at the same time, photovoltaic panel 9 assists power supply; Assembled for use: the cable is detected by monitoring mechanism 2, the ice thickness is detected by millimeter wave radar to be 23±2mm, the infrared thermal imager identifies it as mixed ice, and the control system automatically selects "extrusion crushing + medium pressure mode", that is, the crushing mechanism 5 + the rotary cutting mechanism 6 works; First, the cleaning brush 33 is used to remove the loose snow on the surface at a speed of 300rpm, and the PTC coating is used to melt the adhesive layer; Then, the crushing mechanism 5 is used to extrude and crush the ice layer, and the limiting protection mechanism 8 is used for protection, the whole device travels at a speed of 3m / min by using the walking mechanism 7, and the deicing rate of 1.2km cable is >98%, and the cable outer skin is zero damage.

[0033] III. For ice slide rapid removal operation on steep slope section Application scenario: cable (slope 45°) at outlet section of hydropower station diversion tunnel, diameter of hanging ice slide is >100mm; Slope adaptation: the pre-pressure of the bidirectional spring rod 72 of the V-shaped driving wheel 74 is increased to 180N to ensure adhesion; Ice slide recognition: the monitoring mechanism 2 identifies columnar ice slide, and starts the "rotary cutting + ultrasonic auxiliary" mode, that is, the rotary cutting mechanism 6 and the ultrasonic generator 67 cooperate; The differential cutting is specifically: Small diameter differential ice breaking wheel 65 (80mm) cuts into the ice slide base at 120rpm; Large diameter differential ice breaking wheel 65 (120mm) rotates to expand the cut at 80rpm; Ultrasonic generator 67 assistance: 28kHz ultrasonic waves make ice crystals resonate, reducing cutting resistance by 40%; Limiting protection mechanism 8: real-time monitoring of cable vibration, brake activated within 2ms in case of sudden gusts.

[0034] The resulting effects are: ice slide removal efficiency of 1.5m / min, slope adaptability verified at 60°.

[0035] It should be noted that, in the present text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between or among the entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cable protection device for hydropower generation, comprising a frame (1), characterized in that, Also includes: The monitoring unit (2) is fixed to the front side of the frame (1) by a bracket; The snow removal mechanism (3) is installed on the inner side of the front end of the frame (1). The inner side of the frame (1) is also provided with a snow removal mechanism (4) at the rear side of the snow removal mechanism (3). The snow removal mechanism (4) and the snow removal mechanism (3) work together to form a resonant snow removal effect, which is used to remove the snow on the surface of the cable. An ice-breaking mechanism (5) is located on the inner side of the frame (1) behind the snow removal mechanism (4) and is used to squeeze and break the ice layer on the cable surface. A rotary cutting mechanism (6) is installed inside the frame (1) behind the ice-breaking mechanism (5) and is used to rotary cut off the icicles on the cable. The walking mechanism (7) is located at the rear side of the frame (1) and is laterally clamped on the cable to drive the entire device to move. In addition, photovoltaic panels (9) are installed on both sides of the frame (1), and a power control box (91) is installed at the bottom rear side of the frame (1). A limit protection mechanism (8) is also provided on the rear side of the frame (1).

2. The cable protection device for hydropower generation according to claim 1, characterized in that, The monitoring mechanism (2) includes an ice thickness monitoring sensor and an adaptive controller. The ice thickness monitoring sensor adopts an integrated millimeter-wave radar and an infrared thermal imager.

3. The cable protection device for hydropower generation according to claim 1, characterized in that, The snow removal mechanism (3) includes two cleaning motors (31) installed on the bottom inner side of the front end of the frame (1). Each cleaning motor (31) has a connecting rod (32) connected to its output end. A cleaning brush (33) is fixed to the top of the connecting rod (32). The two cleaning brushes (33) are staggered on both sides of the cable. The cleaning brush (33) is made of composite bristles of nylon and stainless steel wire, and the nylon bristles and stainless steel wire are arranged in an alternating pattern. The surface of the cleaning brush (33) is coated with a PTC thermo-ceramic coating, wherein the PTC thermo-ceramic coating is applied to the base surface of the brush bristles.

4. The cable protection device for hydropower generation according to claim 1, characterized in that, The ice-breaking mechanism (5) includes a lower fixing plate (52) installed at the bottom of the inner side of the frame (1) and an upper fixing plate (51) at the top. An upper clamping plate (56) is fixed in the middle of the bottom surface of the upper fixing plate (51). One end of the upper fixing plate (51) is hinged to the top of one side of the frame (1), and the other end is fixed to the top of the other side of the frame (1) by bolts. Two hydraulic push rods (53) are symmetrically installed on the upper end of the lower fixed plate (52), and two guide rods (54) are also vertically installed on the upper end of the lower fixed plate (52) near the two hydraulic push rods (53). The telescopic ends of the two hydraulic push rods (53) are connected to the lower clamping plate (55), and the two guide rods (54) pass through both ends of the lower clamping plate (55) and are slidably connected to it. It also includes a uniform array of serrated protrusions (57) on the lower surface of the upper clamping plate (56) and the upper surface of the lower clamping plate (55). The serrated protrusions (57) are made of hard alloy substrate and have a WC-Co coating laser-clad on the surface. The surface of the lower clamping plate (55) is also arrayed with ice outlet holes (58).

5. The cable protection device for hydropower generation according to claim 4, characterized in that, The snow removal mechanism (4) includes a positioning plate (41) installed in the middle of the upper end of the upper fixed plate (51). Positioning frames (42) are symmetrically installed on both sides of one end of the positioning plate (41). A limiting roller (43) is rotatably connected between the two positioning frames (42) located below the positioning plate (41). The two positioning frames (42) are also symmetrically connected to inclined scraper frames (44) on their outer sides. The bottom ends of the two scraper frames (44) are connected to scraper (45), and the upper end of the scraper (45) is equipped with a vibration motor (46).

6. The cable protection device for hydropower generation according to claim 1, characterized in that, The rotary cutting mechanism (6) includes two push plates (62) installed on the inner walls of both sides of the frame (1). Each push plate (62) has a fixed crossbar (64) symmetrically installed on one side and at the bottom. The two fixed crossbars (64) are connected together by a differential ice-breaking wheel (65). The differential ice-breaking wheel (65) and the fixed crossbar (64) are rotatably connected. One end of the fixed crossbar (64) is located at the bottom of the differential ice-breaking wheel (65) and a differential motor (66) is installed. The differential motor (66) is fixedly connected to the fixed crossbar (64), and the output end of the differential motor (66) is connected to the differential ice-breaking wheel (65). The inner wall of the differential icebreaker (65) is equipped with a temperature compensation heating plate (68), and an ultrasonic generator (67) is also installed on the top axle of the differential icebreaker (65). The diameter ratio of the two differential icebreaker wheels (65) is 1:1.

5.

7. The cable protection device for hydropower generation according to claim 6, characterized in that, The two push plates (62) are connected to the frame (1) via an adjustment assembly, the adjustment assembly comprising: Hydraulic push rod 2 (61) is installed on the outer wall of the frame (1), and the telescopic end of hydraulic push rod 2 (61) passes through the frame (1) and is fixed to the middle of push plate (62); Two limiting slide rods (63) are symmetrically installed on the frame (1). One end of each of the two limiting slide rods (63) passes through the upper and lower ends of the push plate (62) and is slidably connected to the push plate (62).

8. The cable protection device for hydropower generation according to claim 1, characterized in that, The walking mechanism (7) includes two sets of positioning seats (71) symmetrically installed on the inner wall of the frame (1). Each set of positioning seats (71) consists of two seats. Each positioning seat (71) is symmetrically equipped with two bidirectional spring rods (72). One end of each bidirectional spring rod (72) is connected to a fixed shaft seat (73). Each set of positioning seats (71) is symmetrically connected to two drive wheels (74) through four bidirectional spring rods (72). Each pair of fixed shaft seats (73) is symmetrically distributed at the upper and lower ends of the drive wheels (74) and is rotatably connected to them. A drive motor (75) is installed at the bottom of one of the drive wheels (74) on each of the positioning seats (71). The output end of the drive motor (75) is connected to the drive wheel (74), and the drive motor (75) is fixed on the fixed shaft seat (73). The two drive motors (75) are staggered on both sides of the cable. The drive wheel (74) is a V-groove wheel with tungsten carbide anti-slip studs embedded in the rim.

9. The cable protection device for hydropower generation according to claim 1, characterized in that, The limiting protection mechanism (8) includes a hydraulic push rod three (81) installed in the middle of the inner side of the rear end of the frame (1). The telescopic end of the hydraulic push rod three (81) is connected to a hook (83), and a tension sensor (82) is also provided between the telescopic end of the hydraulic push rod three (81) and the hook (83).

10. The cable protection device for hydropower generation according to claim 1, characterized in that, The power control box (91) is equipped with a low-temperature storage battery, a photovoltaic inverter, a wireless communication module, and a remote control unit.

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