A power cable cleaning apparatus

Abstract

The present application belongs to the technical field of cable cleaning, in particular to a power cable cleaning device. The following scheme is proposed, which comprises a mounting frame, two groups of cleaning mechanisms are arranged in the mounting frame, a spraying mechanism is arranged between the two groups of cleaning mechanisms, the cleaning mechanism is provided with a turntable one, the two ends of the outer wall of the turntable one are fixed with brush plates, brush hairs are arranged on the side walls of the two brush plates close to each other, the cable main body moves between the outer wall of the turntable one and the two brush plates, the turntable one is connected with an electric guide rail one of annular structure, the electric guide rail one is coaxially arranged with the cable main body, and the electric guide rail one reciprocatingly deflects with the turntable one. The deflection of the turntable makes the brush hairs always maintain effective contact with the surface of the cable, avoids the cleaning dead angle caused by the cable deviation, significantly improves the uniformity and reliability of the cleaning effect, and improves the efficiency of the cleaning operation.

Description

Technical Field

[0001] This invention relates to the field of cable cleaning technology, and more particularly to a cleaning device for power cables. Background Technology

[0002] Power cables are cables used to transmit and distribute electrical energy. They are widely used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater power transmission lines across rivers and seas. The surface of the cables needs to be cleaned during the processing and recycling of power cables.

[0003] Existing technologies for cleaning power cables typically involve moving and conveying the cable using an unwinding device, and then cleaning the cable surface using multiple sets of brushes and air or liquid sprays. Generally, the cable moves horizontally between two brushes, and the surface is thoroughly cleaned by the brush bristles contacting the cable surface. However, when the cable shifts to one side, the friction between the other side of the cable and the brush is insufficient, thus affecting the effectiveness of cleaning the cable surface. Summary of the Invention

[0004] Based on the technical problems in the background art, the present invention proposes a cleaning device for power cables.

[0005] The present invention proposes a power cable cleaning device, including a mounting frame, two sets of cleaning mechanisms are arranged inside the mounting frame, a spraying mechanism is arranged between the two sets of cleaning mechanisms, a turntable is provided in the cleaning mechanism, brush plates are fixed at both ends of the outer wall of the turntable, bristles are arranged on the side walls of the two brush plates that are close to each other, the cable body moves between the outer circumference of the turntable and the two brush plates, and an annular electric guide rail is connected to the turntable. The electric guide rail is coaxial with the cable body, and the electric guide rail drives the turntable to reciprocate.

[0006] Preferably, the cleaning mechanism is further provided with a second turntable, which is symmetrically arranged with the first turntable. The two sides of the second turntable are in contact with the two brush plates. The outer circumference of both the first and second turntables is provided with a ring-shaped cleaning pad. The outer wall of the cleaning pad is in contact with the outer wall of the cable body. The second turntable is connected to a ring-shaped electric guide rail, which is coaxial with the electric guide rail.

[0007] Preferably, a rotating shaft is fixed at the center of both turntable one and turntable two, and a connecting seat is provided on the outer side of both turntable one and turntable two away from the cable body. The connecting seat is connected to electric guide rail one and electric guide rail two. A connecting frame one is rotatably connected to one end of the outer wall of the rotating shaft, and an electric push rod is installed between the connecting frame one and the connecting seat.

[0008] Preferably, a second connecting frame is rotatably connected to the end of the outer wall of the rotating shaft away from the first connecting frame. A limit rod is fixed on the connecting seat at a position corresponding to the second connecting frame, and a through hole is provided on the second connecting frame to slide in contact with the limit rod.

[0009] Preferably, a connecting block is provided on the side of the connecting seat, and electric guide rail one and electric guide rail two are connected to the connecting block, with electric guide rail one and electric guide rail two located on both sides of the rotating shaft.

[0010] Preferably, the spraying mechanism is provided with four fixed tubes that are mounted on the mounting bracket. The four fixed tubes are arranged in a ring around the outer periphery of the cable body, and the ends of the fixed tubes facing the cable body are connected to two spray pipes.

[0011] Preferably, a motor is mounted on the connecting frame, and the output shaft of the motor is connected to one end of the rotating shaft for transmission.

[0012] Preferably, an airbag with a ring structure is connected between the outer wall of the first and second turntables and the cleaning pad.

[0013] Preferably, a pressure sensor is installed inside the airbag to monitor the air pressure value inside the airbag in real time; the electric push rod is connected to a current monitor to monitor the operating current of the electric push rod in real time; both the pressure sensor and the current monitor are electrically connected to the controller.

[0014] Preferably, the controller acquires the real-time air pressure and real-time current values ​​corresponding to turntable one and turntable two in the same set of cleaning mechanisms, determines whether the difference between the air pressure values ​​on the upper and lower sides exceeds a preset air pressure difference threshold, determines whether the difference between the current values ​​on the upper and lower sides exceeds a preset current difference threshold, and determines whether the relationship between the air pressure values ​​and the relationship between the current values ​​are consistent. When the above three judgment conditions are met at the same time, it is determined that the cable body has an abnormal offset, and the offset direction is determined according to the relationship between the air pressure values.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this invention, by setting up a reciprocating turntable driven by an electric guide rail and a brush plate on it, and by arranging two sets of cleaning mechanisms in opposite directions and symmetrically, dynamic and multi-directional cleaning of the cable body surface is achieved. When the cable has slight radial deviation, the deflection of the turntable ensures that the brush bristles always maintain effective contact with the cable surface, avoiding cleaning dead corners caused by cable deviation, significantly improving the uniformity and reliability of the cleaning effect, and improving the efficiency of the cleaning operation.

[0017] 2. In this invention, by establishing air pressure balance judgment, current balance judgment and trend consistency judgment, the offset state of the cable is logically combined to determine the offset state, which can effectively distinguish between the real abnormal cable offset and sensor failure, avoid misjudgment and misadjustment, and ensure the continuous stability of the cleaning effect. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of a power cable cleaning device proposed in this invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the mounting frame of a power cable cleaning device proposed in this invention;

[0020] Figure 3 This is a schematic diagram of the distribution structure of turntable one and turntable two of a power cable cleaning device proposed in this invention;

[0021] Figure 4 This is a schematic diagram of the electric guide rail position structure of a power cable cleaning device proposed in this invention.

[0022] Figure 5 This is a schematic diagram of the turntable position structure of a power cable cleaning device proposed in this invention.

[0023] Figure 6 This is a schematic diagram of the electric guide rail structure of a power cable cleaning device proposed in this invention.

[0024] In the diagram: 1. Mounting bracket, 2. Cable body, 3. Turntable 1, 4. Brush plate, 5. Electric guide rail 1, 6. Turntable 2, 7. Electric guide rail 2, 8. Airbag, 9. Cleaning pad, 10. Rotary shaft, 11. Connecting bracket 1, 12. Connecting bracket 2, 13. Connecting seat, 131. Connecting block, 14. Electric push rod, 15. Limiting rod, 16. Motor, 17. Fixing seat, 18. Fixing pipe, 19. Spray nozzle. Detailed Implementation

[0025] Example 1: Refer to Figures 1-6A power cable cleaning device includes a mounting frame 1, within which two sets of cleaning mechanisms are installed. A spraying mechanism is positioned between the two sets of cleaning mechanisms. The cable body 2 moves horizontally between the two sets of cleaning mechanisms. The spraying mechanism sprays liquid or air towards the positions of the cable body 2 corresponding to the cleaning mechanisms. Each cleaning mechanism has a turntable 3, with brush plates 4 fixed at both ends of its outer wall. Brush bristles are provided on the sidewalls of the two brush plates 4 that are close to each other. The cable body 2 moves between the outer circumference of the turntable 3 and the two brush plates 4. An annular electric guide rail 5 is connected to the outside of the turntable 3. The electric guide rail 5 is coaxially arranged with the cable body 2. The positions of the electric guide rail 5 and the turntable 3 are pre-installed to ensure that the cable body 2 is coaxially arranged with the electric guide rail 5 when it moves horizontally through the turntable 3 of the two sets of cleaning mechanisms. During use, the spraying mechanism sprays cleaning liquid or atomized airflow towards the positions of the cable body 2 and the cleaning mechanisms to assist in cleaning. Furthermore, during the horizontal movement of the cable body 2, it contacts the bristles on the brush plates 4 on both sides for cleaning. Simultaneously, during the cleaning process, the electric guide rail 5 drives the turntable 3 to reciprocate. The turntables 3 of the two cleaning mechanisms are arranged in opposite directions with respect to the cable body 2. That is, when one turntable 3 is below the cable body 2, the other turntable 3 will be above the cable body 2. The reciprocating deflection of the turntable 3 with the brush plate 4 and the symmetrical arrangement of the two cleaning mechanisms ensure complete cleaning of the surface of the cable body 2. Moreover, the reciprocating deflection of the turntable 3 with the cable body 2 can, on the one hand, continuously change the position between the bristles and the cable body 2 to improve the cleaning effect. On the other hand, when the cable body 2 deviates to the side of a certain brush plate 4, the rotation of the positions of the two brush plates 4 ensures the cleaning effect on the side of the cable body 2 that deviates from the side, avoiding the cable body 2 from being moved away from the bristles on one side and thus not being effectively cleaned. Therefore, the above scheme can effectively improve the cleaning effect and cleaning efficiency of the cable.

[0026] In this invention, the cleaning mechanism is further provided with a second turntable 6, which is symmetrically arranged with the first turntable 3. The two sides of the second turntable 6 are in contact with the two brush plates 4. The outer circumference of both the first turntable 3 and the second turntable 6 is provided with annular cleaning pads 9. The outer wall of the cleaning pads 9 is in frictional contact with the outer wall of the cable body 2. The second turntable 26 is connected to an annular electric guide rail 7, which is coaxially arranged with the first electric guide rail 5. By using the second turntable 26, which is symmetrically arranged with the first turntable 3, the cable body 2 is partially limited to prevent it from separating from the brush plates 4 and affecting the cleaning effect. On the other hand, the synchronous reciprocating rotation of the first turntable 3 and the second turntable 26 ensures that the partially offset cable body 2 is completely and effectively cleaned, avoiding insufficient friction due to offset, which would affect the cleaning effect.

[0027] In this invention, a rotating shaft 10 is fixed at the center of both turntable 3 and turntable 6. A connecting seat 13 is provided on the outer side of both turntable 3 and turntable 6 away from the cable body 2. The connecting seat 13 is connected to the electric guide rail 5 and the electric guide rail 7. A connecting frame 11 is rotatably connected to one end of the outer wall of the rotating shaft 10. An electric push rod 14 is installed between the connecting frame 11 and the connecting seat 13. The connection between the connecting seat 13 and the electric push rod 14 enables turntable 3 and turntable 6 to reciprocate around the electric guide rail. The electric push rod 14 can be used to pre-adjust the position and gap of turntable 3 and turntable 6 to improve the applicability of cleaning. At the same time, the squeezing force of the cleaning pad 9 can be adjusted during the cleaning process to improve the cleaning effectiveness and work efficiency.

[0028] In this invention, a connecting frame 12 is rotatably connected to the end of the outer wall of the rotating shaft 10 away from the connecting frame 11. A limit rod 15 is fixed on the connecting seat 13 at a position corresponding to the connecting frame 12. A through hole is provided on the connecting frame 12 to slide in contact with the limit rod 15, thereby ensuring the stability of the rotating shaft 10 and the first and second turntables 3 and 6. A connecting block 131 is provided on the side of the connecting seat 13. The first electric guide rail 5 and the second electric guide rail 7 are connected to the connecting block 131. The first electric guide rail 5 and the second electric guide rail 7 of the same cleaning mechanism are located on both sides of the rotating shaft 10. A fixed seat 17 is fixedly installed between the first electric guide rail 5 and the mounting frame 1 at a position away from the connecting seat 13. This allows the reciprocating rotation range of the first turntable 3 and the second turntable 6 to exceed 180 degrees, thereby ensuring that the two sets of cleaning mechanisms can perform a complete cleaning operation on the periphery of the cable body 2, while ensuring the stability of the first turntable 3 and the second turntable 6 as they rotate with the electric guide rails and rotate around the rotating shaft 10.

[0029] In this invention, the spraying mechanism is provided with four fixed pipes 18 that are mounted on the mounting bracket 1. The four fixed pipes 18 are arranged in a ring around the cable body 2. The ends of the fixed pipes 18 facing the cable body 2 are connected to two spray pipes 19. The two spray pipes 19 are respectively directed toward two sets of cleaning mechanisms, so as to spray water, cleaning liquid, mist or pure gas supplied from the outside onto the surface of the cable body 2. This, together with the main cleaning operation of the brush plate 4 and the auxiliary cleaning operation of the cleaning pad 9, improves the cleaning effect and work efficiency.

[0030] In this invention, a motor 16 is installed on the connecting frame 11. The output shaft of the motor 16 is connected to one end of the rotating shaft 10. The motor 16 actively drives the two rotating shafts 10 to rotate the first rotating disk 3 and the second rotating disk 6 respectively. The rotation of the first rotating disk 3 and the second rotating disk 6 around the cable body 2 improves the friction cleaning effect between the bristles on the brush plate 4 and the cleaning pad 9 and the cable body 2. It can also be set so that the moving direction of the contact position between the first rotating disk 3 and the second rotating disk 2 and the cable body 2 is opposite to the moving direction of the cable body 2, thereby improving the cleaning effect. It should be noted that the installation of the motor 16 is optional. The motor 16 can also be omitted, and the rotation of the first rotating disk 3 and the second rotating disk 6 around the rotating shaft 10 can be carried by the moving friction of the cable body 2 itself.

[0031] Example 2: Refer to Figures 1-6 A power cable cleaning device, based on embodiment 1, has an annular airbag 8 connected between the outer walls of turntable 1 3 and turntable 2 6 and the cleaning pad 9. The airbag 8 connects and supports the cleaning pad 9. Under normal conditions, the cable body 2 squeezes the cleaning pad 9 and the airbag 8 so that the cleaning pad 9 has sufficient friction to clean the surface of the cable body 2. When the cable body 2 is partially offset, the cleaning pad 9 on the side away from the cable body 2 can be opened outward under the action of the airbag 8 to ensure the cleaning effect and completeness.

[0032] To achieve intelligent monitoring and adaptive adjustment, and to ensure that the cable body can still be cleaned evenly and effectively when it deviates, this embodiment introduces a monitoring and control system based on multi-parameter comprehensive judgment: Specifically, each airbag is equipped with an internal air pressure sensor, which is electrically connected to the device's controller to monitor the air pressure value inside each airbag in real time; at the same time, each electric push rod's drive circuit is connected to a current monitor, which is also electrically connected to the controller to monitor the operating current of each electric push rod in real time.

[0033] To accurately determine whether the cable body has experienced abnormal displacement, the controller executes the following comprehensive judgment and control logic:

[0034] 1. First, the controller synchronously collects the readings of all pressure sensors and current monitors at fixed time intervals. For ease of description, take a set of rotating disks 1 and 2 that are set opposite to each other in a set of cleaning mechanisms as an example. The air pressure value of the airbag corresponding to the upper rotating disk 1 is recorded as the upper air pressure value, and the corresponding electric push rod current value is recorded as the upper current value; the air pressure value of the airbag corresponding to the lower rotating disk 2 is recorded as the lower air pressure value, and the corresponding electric push rod current value is recorded as the lower current value.

[0035] 2. The controller has built-in preset air pressure difference threshold and current difference threshold to evaluate the operating status of the cable body. The controller performs a comprehensive evaluation through the following three independent judgment conditions:

[0036] The first condition is the air pressure balance judgment. The controller calculates the absolute value of the difference between the upper and lower air pressure values ​​and compares the difference with the preset air pressure difference threshold. If the difference exceeds the preset air pressure difference threshold, it indicates that there is a significant difference in the squeezing force of the cable body on the upper and lower airbags.

[0037] The second condition is current balance judgment. The controller calculates the absolute value of the difference between the upper current value and the lower current value, and compares the difference with the preset current difference threshold. If the difference exceeds the preset current difference threshold, it indicates that there is a significant difference in the load of the upper and lower electric push rods.

[0038] The third condition is trend consistency judgment. The controller compares the upper air pressure value with the lower air pressure value, and at the same time compares the upper current value with the lower current value. If the upper air pressure value is greater than the lower air pressure value, the upper current value is also greater than the lower current value; or if the upper air pressure value is less than the lower air pressure value, the upper current value is also less than the lower current value. This indicates that the air pressure change trend is consistent with the current change trend. Conversely, if the two change trends are opposite, it indicates that there may be a sensor malfunction or other abnormal situation.

[0039] 3. Based on the fulfillment of the above three conditions, the controller makes a comprehensive judgment on the operating status of the cable body:

[0040] 3.1 When the first condition is not met and the second condition is not met, it indicates that the air pressure and current on both the upper and lower sides are within the balance range. The controller determines that the cable body is in normal operation and no adjustment is required.

[0041] 3.2 When the first condition, the second condition, and the third condition are all met, it indicates that the pressure difference and current difference between the upper and lower sides have exceeded the allowable range, and the trends of both are consistent. The controller determines that the cable body has shifted abnormally. At this time, the controller determines the direction of shift based on the relationship between the upper and lower air pressure values: if the upper air pressure value is greater than the lower air pressure value, the cable body is determined to shift upward; if the upper air pressure value is less than the lower air pressure value, the cable body is determined to shift downward.

[0042] 3.3 When the first condition is met, the second condition is met, but the third condition is not met, it indicates that the trends of air pressure and current change are opposite. The controller determines that there may be abnormalities such as sensor failure or actuator jamming in the system, and manual intervention is required for inspection.

[0043] 3.4 When the first condition is met but the second condition is not met, or the first condition is not met but the second condition is met, it indicates that only a single parameter is abnormal. At this time, the controller determines that it is in a one-sided warning state. Although it does not immediately trigger active adjustment, it will record this abnormal event. If the same side has multiple one-sided warnings within a unit of time, the warning level will be increased to prompt the staff to check.

[0044] 4. When the controller determines that the cable body has shifted abnormally, it immediately starts the adaptive adjustment program. The controller sends a control command to the electric push rod on the side away from the shift direction according to the determined shift direction. Specifically, if the cable body is determined to shift upward, the electric push rod connected to the lower turntable 2 is controlled to extend by a preset step, pushing the cleaning pad below to fit more tightly against the lower side of the cable body, thereby compensating for insufficient contact pressure caused by the shift. If the cable body is determined to shift downward, the electric push rod connected to the upper turntable 1 is controlled to extend by a preset step, pushing the cleaning pad above to fit more tightly against the upper side of the cable body.

[0045] 5. After the electric push rod performs the extension action, the controller continues to monitor the changes in air pressure and current values ​​in real time, and re-performs the above-mentioned state judgment. If the offset state is eliminated and all parameters return to the normal range, the adjustment stops; if the offset state still exists, the step adjustment is repeated multiple times until the cable body returns to normal operation.

[0046] 6. In addition, when the controller determines that the system is in a suspected fault state, it will immediately output a fault alarm signal to prompt the staff to check the sensors and actuators. When the controller determines that the main body of the cable has an abnormal deviation and the deviation cannot be eliminated after the number of consecutive adjustments exceeds the preset maximum number of adjustments, it will output a serious deviation alarm signal to prompt the staff to check whether there are fundamental faults such as mechanical jamming or abnormal tension in the conveying path of the main body of the cable.

[0047] Through the monitoring and control logic based on multiple conditions, this cleaning equipment can accurately and reliably sense the operating status of the cable body and perform effective adaptive compensation when abnormal deviation occurs. It also has fault diagnosis and early warning capabilities, ensuring the continuity of cleaning effect and the reliability of equipment operation.

[0048] For ease of understanding, the following specific examples are provided:

[0049] Example 1, Monitoring example under normal operating conditions: Suppose a power cable with an outer diameter of 50mm is passing through the cleaning equipment at a speed of 0.5m / s, and the equipment's preset air pressure difference threshold is 0.02MPa and current difference threshold is 0.3A.

[0050] At a certain moment, the controller collected the following data: the air pressure value of the airbag corresponding to the upper turntable one is 0.15 MPa, and the current value of the upper electric push rod is 1.2 amperes; the air pressure value of the airbag corresponding to the lower turntable two is 0.16 MPa, and the current value of the lower electric push rod is 1.3 amperes.

[0051] The controller makes a comprehensive judgment:

[0052] First, the pressure difference between the upper and lower sides is 0.01 MPa, which is less than the preset threshold of 0.02 MPa, so the pressure balance judgment is not valid.

[0053] Secondly, the difference between the current values ​​on the upper and lower sides is 0.1 amperes, which is less than the preset threshold of 0.3 amperes, so the current balance judgment is not valid.

[0054] Since the first two conditions are not met, the controller does not need to perform trend consistency judgment and directly determines that the main body of the cable is in normal operation. At this time, the controller does not output any adjustment command, the electric push rod remains in its current position, and the cleaning equipment continues to work stably.

[0055] Example 2: Monitoring and adjustment under abnormal offset conditions:

[0056] At another moment, due to a slight vibration in the cable unwinding mechanism, the cable body shifted upwards.

[0057] The controller collected the following data: the air pressure value of the airbag corresponding to the upper turntable one increased to 0.21 MPa (due to the upward compression of the cable); the air pressure value of the airbag corresponding to the lower turntable two decreased to 0.12 MPa (due to the upward detachment of the cable); the current value of the upper electric actuator increased to 1.8 Amperes (due to the increased load); the current value of the lower electric actuator decreased to 0.9 Amperes (due to the decreased load).

[0058] The controller makes a comprehensive judgment:

[0059] The first step is to calculate the difference in air pressure between the upper and lower sides. The difference between the upper air pressure of 0.21 MPa and the lower air pressure of 0.12 MPa is 0.09 MPa. This value is much greater than the preset threshold of 0.02 MPa, so the air pressure balance judgment is valid.

[0060] The second step is to calculate the difference between the current values ​​on the upper and lower sides. The difference between the upper current value of 1.8 amps and the lower current value of 0.9 amps is 0.9 amps. This value is much greater than the preset threshold of 0.3 amps, so the current balance judgment is valid.

[0061] The third step is to determine the consistency of the trend. At this point, the upper air pressure value of 0.21 MPa is greater than the lower air pressure value of 0.12 MPa, and the upper current value of 1.8 amperes is also greater than the lower current value of 0.9 amperes. The relationship between the two is completely consistent, therefore the trend consistency judgment is valid.

[0062] Since all three judgment conditions are met simultaneously, the controller accurately determines that the main body of the cable has shifted abnormally. Based on the relationship between air pressure values, the air pressure value above is greater than the air pressure value below, so the direction of shift is determined to be upward.

[0063] The controller then initiates an adaptive adjustment program. Due to the upward offset of the cable, the contact pressure between the lower cleaning pad and the cable is insufficient. Therefore, the controller sends an adjustment command to the electric push rod connected to the lower turntable 2. According to the preset step amount, the controller commands the electric push rod to extend by 2 mm.

[0064] After the electric push rod extends, the cleaning pad below is pushed upwards, re-adhering tightly to the lower surface of the cable body. The controller continues to monitor the data and finds that the air pressure below gradually rises to 0.17 MPa, and the current below gradually rises to 1.4 Amps. The air pressure difference and current difference between the upper and lower sides gradually decrease. After two similar step adjustments, the air pressure values ​​on the upper and lower sides stabilize at 0.16 MPa and 0.15 MPa, respectively, and the current values ​​stabilize at 1.3 Amps and 1.2 Amps, respectively. All differences have fallen back to the preset threshold range. The controller determines that the offset state has been eliminated, stops the adjustment, and the equipment resumes normal operation.

[0065] Example 3: Monitoring and alarm examples under suspected fault conditions:

[0066] Suppose that at a certain moment, the controller collects the following abnormal data: the airbag pressure value corresponding to the upper turntable one is 0.22 MPa (too high); the airbag pressure value corresponding to the lower turntable two is 0.11 MPa (too low); the current value of the upper electric actuator is 0.8 Amperes (too low); and the current value of the lower electric actuator is 1.6 Amperes (too high).

[0067] The controller makes a comprehensive judgment:

[0068] The first step is that the pressure difference between the upper and lower sides is 0.11 MPa, which is greater than the preset threshold of 0.02 MPa, so the pressure balance judgment is established.

[0069] The second step is that the difference in current values ​​between the upper and lower sides is 0.8 amperes, which is greater than the preset threshold of 0.3 amperes, so the current balance judgment is valid.

[0070] The third step is to determine the consistency of the trend. At this point, the upper air pressure value of 0.22 MPa is greater than the lower air pressure value of 0.11 MPa, but the upper current value of 0.8 amperes is less than the lower current value of 1.6 amperes. The two values ​​are opposite, so the trend consistency determination is not valid.

[0071] The controller determines that the system is in a suspected fault state based on the combination of "the first two conditions are met but the third condition is not met". In this case, the data performance does not conform to physical laws (the upward deviation of the cable should not cause the current of the upper electric actuator to decrease). It is very likely that the upper air pressure sensor is damaged (the reading is falsely high) or the lower current monitor is damaged (the reading is falsely high), or the electric actuator itself is stuck.

[0072] The controller immediately outputs a fault alarm signal and displays "Sensor or actuator suspected of malfunction, please check" on the human-machine interface. After receiving the alarm, the staff promptly stopped the machine for inspection and found that the signal cable plug of the upper air pressure sensor was loose, causing abnormal readings. After re-plugging the plug, the equipment returned to normal, avoiding incorrect adjustments based on erroneous data.

[0073] Example 4: Monitoring and recording under unilateral early warning conditions:

[0074] Assume that during a certain period of time, the cable body experiences slight vibration, but this does not cause significant uneven cleaning pressure. The controller collects the following data: the upper air pressure is 0.18 MPa, the lower air pressure is 0.14 MPa, and the air pressure difference is 0.04 MPa, which is greater than the preset threshold of 0.02 MPa; the upper current is 1.3 Amps, the lower current is 1.2 Amps, and the current difference is 0.1 Amps, which is less than the preset threshold of 0.3 Amps.

[0075] The controller makes a comprehensive judgment: the air pressure balance judgment is true, but the current balance judgment is false; since the two conditions are not met at the same time, the controller does not judge it as an abnormal offset state that requires active adjustment, but judges it as a one-sided warning state.

[0076] The controller records the event: time point, offset direction (upward), and abnormal parameters (air pressure). At the same time, the controller starts a counting window to count the number of times a single-sided warning occurs on the same side (upper side) in the last 10 minutes.

[0077] If it only happens occasionally, the controller will simply record it without making any adjustments. However, if the cable continues to vibrate, causing the number of warnings on the upper side to reach 5 within 10 minutes, exceeding the preset warning threshold, the controller will raise the warning level and display a message on the human-machine interface: "Frequent pressure fluctuations occur on the upper side. It is recommended to check the stability of the cable delivery." After seeing the message, the operator can check the unwinding mechanism or guide wheel in advance to eliminate the vibration hazard and prevent the problem from worsening into a serious offset fault.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power cable cleaning device, comprising a mounting frame (1), wherein two sets of cleaning mechanisms are disposed within the mounting frame (1), and a spraying mechanism is disposed between the two sets of cleaning mechanisms, characterized in that, The cleaning mechanism is equipped with a turntable (3), and brush plates (4) are fixed at both ends of the outer wall of the turntable (3). Brush bristles are provided on the side walls of the two brush plates (4) that are close to each other. The cable body (2) moves between the outer wall of the turntable (3) and the two brush plates (4). The turntable (3) is connected to an electric guide rail (5) with a ring structure. The electric guide rail (5) is coaxially arranged with the cable body (2). The electric guide rail (5) drives the turntable (3) to reciprocate.

2. The power cable cleaning device according to claim 1, characterized in that, The cleaning mechanism is also equipped with a second turntable (6), which is symmetrically arranged with the first turntable (3). The two sides of the second turntable (6) are in contact with the two brush plates (4). The outer circumference of the first turntable (3) and the second turntable (6) are equipped with a ring-shaped cleaning pad (9). The outer wall of the cleaning pad (9) is in contact with the outer wall of the cable body (2). The second turntable (6) is connected to a ring-shaped electric guide rail (7). The second electric guide rail (7) is coaxially arranged with the first electric guide rail (5).

3. The power cable cleaning device according to claim 2, characterized in that, The center of turntable 1 (3) and turntable 2 (6) are both fixed with a rotating shaft (10). The outer side of turntable 1 (3) and turntable 2 (6) away from the cable body (2) is provided with a connecting seat (13). The connecting seat (13) is connected to electric guide rail 1 (5) and electric guide rail 2 (7). One end of the outer wall of the rotating shaft (10) is rotatably connected to a connecting frame 1 (11). An electric push rod (14) is installed between the connecting frame 1 (11) and the connecting seat (13).

4. The power cable cleaning device according to claim 3, characterized in that, The outer wall of the rotating shaft (10) is rotatably connected to the second connecting frame (12) at the end away from the first connecting frame (11). A limit rod (15) is fixed on the connecting seat (13) at the position corresponding to the second connecting frame (12). A through hole is opened on the second connecting frame (12) to slide in contact with the limit rod (15).

5. The power cable cleaning device according to claim 3, characterized in that, The connecting seat (13) is provided with a connecting block (131) on its side. Electric guide rail one (5) and electric guide rail two (7) are connected to the connecting block (131). Electric guide rail one (5) and electric guide rail two (7) are located on both sides of the rotating shaft (10).

6. A power cable cleaning device according to any one of claims 1 to 5, characterized in that, The spraying mechanism is equipped with four fixed tubes (18) that are mounted on the mounting bracket (1). The four fixed tubes (18) are arranged in a ring around the cable body (2). The ends of the fixed tubes (18) facing the cable body (2) are connected to two spray pipes (19).

7. A power cable cleaning device according to any one of claims 3 to 5, characterized in that, A motor (16) is installed on the connecting frame (11), and the output shaft of the motor (16) is connected to one end of the rotating shaft (10) for transmission.

8. A power cable cleaning device according to any one of claims 3 to 5, characterized in that, The outer walls of turntable one (3) and turntable two (6) are connected to the cleaning pad (9) by an air bladder (8) with an annular structure.

9. A power cable cleaning device according to claim 8, characterized in that, An air pressure sensor is installed inside the airbag (8), which is used to monitor the air pressure value inside the airbag (8) in real time. The electric push rod (14) is connected to a current monitoring instrument, which is used to monitor the working current of the electric push rod (14) in real time. Both the pressure sensor and the current monitor are electrically connected to the controller.

10. A power cable cleaning device according to claim 9, characterized in that, The controller obtains the real-time air pressure value and real-time current value corresponding to turntable one (3) and turntable two (6) in the same group of cleaning mechanisms, determines whether the difference between the air pressure values ​​on the upper and lower sides exceeds the preset air pressure difference threshold, determines whether the difference between the current values ​​on the upper and lower sides exceeds the preset current difference threshold, and determines whether the relationship between the size of the air pressure value and the size of the current value are consistent. When the above three judgment conditions are met at the same time, it is determined that the cable body (2) has an abnormal offset, and the offset direction is determined according to the relationship between the air pressure values.

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