A device and method for testing the function of a power distribution vehicle cable reeling device

Abstract

The application belongs to the technical field of cable detection, and particularly relates to a device for function test of a cable winding and unwinding device of a distribution vehicle, which comprises a moving trolley, a controller arranged on the moving trolley and N test units, each of the test units comprises, from front to back, a first cable guide part, a second cable guide part and a cable winding part; the first cable guide part comprises a guide cylinder A and a camera A, the second cable guide part comprises a guide cylinder B, a camera B and a camera C, and each of the guide cylinder A and the guide cylinder B is provided with a wire passing channel through which a single-core cable passes from front to back; the camera A monitors the working state of a corresponding reel A and the arrangement state of the single-core cable on the reel A, the camera B monitors the bending degree of a corresponding single-core cable bending part, and the camera C monitors the arrangement state of the single-core cable on a corresponding reel B. The technical scheme fills the blank of lack of automatic equipment for function test of the cable winding and unwinding device of the distribution vehicle.

Description

Technical Field

[0001] This invention belongs to the field of cable testing technology, specifically relating to a device and method for functional testing of a cable winding and unwinding device for a power distribution vehicle. Background Technology

[0002] A power distribution vehicle is a specialized vehicle used for live-line work on power distribution networks. Based on their operational functions, they are categorized as: bypass cable vehicles, mobile transformer substation vehicles, mobile ring main unit vehicles, bypass switch vehicles, etc. Each vehicle is equipped with a cable winding and unwinding device and its control system. The cable winding and unwinding device is a specialized device for winding and unwinding cables. The cables are composed of multi-strand soft copper wires and are single-core power cables that can be repeatedly bent and reused. Phase A is marked in yellow, phase B in green, phase C in red, and the neutral wire N in blue or brown. Viewed from the terminals, A, B, C, and N are arranged sequentially from left to right. The cable winding and unwinding device mainly consists of a circular track, sprocket and chain drive, anti-rotation mechanism, cable reel, and reel drive.

[0003] The cable winding and unwinding device should have the functions of continuous winding and unwinding, inching, accelerated and decelerated winding and unwinding, simultaneous winding and unwinding of multiple phases, and separate winding and unwinding of single phases. There should be no jamming or abnormal operation during the test. The functional tests of the cable winding and unwinding device should be conducted under the following conditions: unloaded (without cable) and fully loaded (with cable on the coil).

[0004] Currently, all tests are conducted manually, based on observation and judgment, which leads to numerous human interference factors and results in low efficiency and quality. Taking a bypass single-core cable as an example: the conductive core is composed of multiple strands of soft copper wire with a cross-section of not less than 35mm². 2 The insulation layer is generally made of materials such as ethylene propylene rubber, thermoplastic synthetic rubber, and heat-resistant elastic cross-linked polyethylene, with a thickness of not less than 5 mm. The shielding layer is generally made of galvanized copper and fiber woven together, with a cross-sectional area of ​​not less than 10 mm². 2 The outer sheath is generally made of weather-resistant rubber with a thickness of not less than 2mm. A single-core cable is typically about 50m long and weighs about 23kg. During the test, all four phases (A, B, C, and N) must be simultaneously wound and unwound along their full length. To prevent interference between the phase conductors and to simulate actual usage conditions, test personnel need to pull the cable conductors while walking. This is not only physically demanding but also occupies personnel and space, and can sometimes cause unnecessary wear and damage to the cable conductors. Test personnel manually operate the control system or remote control of the cable winding device and observe and judge whether each coil (A, B, C, and N) is stuck or in an abnormal operating state. In this operation, observation, and judgment process, misjudgments and omissions often occur, resulting in low test efficiency and quality. Currently, there is no device or method to solve this problem. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a device and method for testing the function of a cable retraction device for a power distribution vehicle.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A functional testing device for a cable reeling / unwinding mechanism on a power distribution vehicle includes a mobile trolley, a controller mounted on the trolley, and N test units. Each test unit, from front to back, includes a first cable guide, a second cable guide, and a cable reel. A gap exists between the first and second cable guides to accommodate the bend in a single-core cable. A long shaft B is fixedly mounted at the rear of the mobile trolley. The cable reel includes a reel B, which is coaxially rotatably connected to the long shaft B. The rotation of the reel B is driven by a motor C. The mobile trolley includes a support platform, and both the first and second cable guides form left-right linear sliding pairs with the support platform. The left and right linear movements of the first cable guide and the second cable guide are driven by motor A and motor B, respectively. The first cable guide includes guide cylinder A and camera A, and the second cable guide includes guide cylinder B, camera B, and camera C. Both guide cylinder A and guide cylinder B are provided with cable passages that allow single-core cables to pass through from front to back. Camera A monitors the working status of the corresponding reel A and the arrangement of the single-core cables on reel A. Camera B monitors the bending degree of the corresponding single-core cable bend. Camera C monitors the arrangement of the single-core cables on the corresponding reel B. The actions of motors A, B, and C are all controlled by a controller, and cameras A, B, and C are all connected to the controller.

[0007] Furthermore, the mobile trolley's carrying platform is provided with a lead screw A and a guide rod A along the left and right directions; the first cable guide part includes a horizontal connecting plate A, the motor A is a hollow shaft servo motor, the motor A is fixedly connected to the horizontal connecting plate A, the hollow rotating shaft of the motor A is matched and screwed to the lead screw A, and a guide sleeve A is fixedly provided on the horizontal connecting plate A, and the guide sleeve A is linearly slidably connected to the guide rod A.

[0008] Furthermore, the horizontal connecting plate A is provided with a vertical lifting mechanism B, and the lifting end of the vertical lifting mechanism B is provided with a rotating mechanism D. The rotating mechanism D rotates around a vertical axis. The rotating end of the rotating mechanism D is provided with a pitch rotating mechanism E. The rotating direction of the pitch rotating mechanism E is around a horizontal axis. The pitch end of the pitch rotating mechanism E is provided with a linear moving mechanism A. The moving direction of the linear moving mechanism A is the forward and backward direction. The guide cylinder A is fixedly installed at the moving end of the linear moving mechanism A, and the camera A is fixedly installed on the guide cylinder A.

[0009] Furthermore, the vertical lifting mechanism B is a servo electric cylinder B, and the lifting end of the vertical lifting mechanism B is a telescopic end B, which is provided with a flange B; the rotation mechanism D includes a motor D, which is fixedly connected to the flange B, and the shaft B of the motor D is vertically arranged, with a flange A provided on the shaft B; the pitch rotation mechanism E includes a motor E, which is fixedly connected to the flange A, and the shaft A of the motor E is horizontally arranged; the linear movement mechanism A is a servo electric cylinder A, and the cylinder body of the servo electric cylinder A is fixedly connected to the shaft A of the motor E; the guide cylinder A is fixedly connected to the telescopic end A of the servo electric cylinder A through a support sleeve A.

[0010] Furthermore, the cylinder body of the servo electric cylinder A is fixedly connected to the shaft A of the motor E via a clamp. A support plate is fixedly mounted on the clamp, and a bellows-style protective cover is mounted on the support plate. The two ends of the opening of the bellows-style protective cover are fixedly connected to the support sleeve A and the tail of the cylinder body of the servo electric cylinder A, respectively. The cross-sectional shape of the bellows-style protective cover is U-shaped. The telescopic cavity of the bellows-style protective cover is used to allow the single-core cable to pass through. The bottom surface of the inner cavity of the bellows-style protective cover is used to support the single-core cable, and the two sides of the inner cavity of the bellows-style protective cover are used to provide limits for supporting the single-core cable. The front end of the support plate is provided with a downward arc, which is used to prevent the bellows-style protective cover from jamming during the telescopic process.

[0011] Furthermore, the mobile trolley's carrying platform is provided with a lead screw B and a guide bar B along the left and right directions; the second cable guide includes a horizontal connecting plate B, the motor B is a hollow shaft servo motor, the motor B is fixedly connected to the horizontal connecting plate B, the hollow rotating shaft of the motor B is matched and screwed to the lead screw B, and a guide sleeve B is fixedly provided on the horizontal connecting plate B, and the guide sleeve B is linearly slidably connected to the guide bar B.

[0012] Furthermore, a vertical lifting mechanism C is fixedly provided on the horizontal connecting plate B, and both the guide cylinder B and the camera B are fixedly connected to the lifting end of the vertical lifting mechanism C, while the camera C is fixedly connected to the guide cylinder B.

[0013] Furthermore, the vertical lifting mechanism C is a servo electric cylinder C. The telescopic end C of the servo electric cylinder C is provided with a flange D. A support rod C is fixedly provided on the flange D. The guide cylinder B and the camera B are both fixedly connected to the support rod C.

[0014] Furthermore, swivel casters are provided at all four corners of the support platform, and caster locking pedals are provided on the swivel casters; a handle bracket is fixedly connected to the rear of the support platform, and a handle is fixed on the handle bracket.

[0015] A method for testing the function of a cable reel-up device in a power distribution vehicle involves opening the rear door of the power distribution vehicle, fixing the cable reel-up device for testing as described above to the rear of the vehicle, and connecting the power distribution vehicle's reel control system to the controller; then performing the following tests one by one: Test Item 1: Full-load rotation test, including steps SA1 to SA3: SA1; The controller controls the operation of the cable winding and unwinding device through the reel control system. First, it controls the cable winding and unwinding device to make reel A fully loaded with cable reel A and synchronously rotate it forward and backward 3 times each. SA2: The cable winding and unwinding device is then controlled to make reel A fully loaded with cable reel A and perform inching, speed-up, and speed-down rotation tests in sequence; each camera A sends monitoring data to the controller, and the controller outputs a judgment conclusion after image analysis. SA3: The controller outputs a message indicating "Full load rotation test completed"; Test Item 2: Full Cycle Test, including steps SB1-SB8: SB1: Manually pass the first end of the single-core cable on each cable reel A through guide cylinder A and guide cylinder B in sequence, and then fix it to reel B; SB2: Execute steps SB3 to SB7 according to the set parameters for uniform cable winding and unwinding; SB3: The controller controls the cable winding device to rotate reel A forward at a set speed to release the single-core cable. The controller uses monitoring images uploaded by camera B to determine the degree of bending of the single-core cable's bends. When the degree of bending exceeds a set limit, the controller controls motor C to drive reel B to wind up the single-core cable. During winding, the controller controls the speed of motor C based on the degree of bending of the single-core cable's bends to prevent abnormal tension on reel A. The controller uses monitoring images from camera A to control the movement of motor A, causing the guide cylinder A of the first cable guide to move linearly left and right, thus smoothly guiding the single-core cable released from reel A. The controller uses monitoring images from camera C to control the movement of motor B, causing the guide cylinder B of the second cable guide to move linearly left and right, thus neatly winding the single-core cable onto reel B. SB4: When the monitoring image from camera A determines that there is no remaining single-core cable on the corresponding reel A, the controller stops the cable winding and unwinding device and motor C from rotating. SB5: The controller controls the cable winding and unwinding device to rotate reel A in the opposite direction at a set speed to wind up the single-core cable, while simultaneously controlling motor C to drive reel B to rotate in the opposite direction to release the single-core cable. During the winding process, the controller controls the speed of motor C based on the degree of bending of the single-core cable's bends to prevent the single-core cable from exerting abnormal tension on the corresponding reel A. The controller controls the movement of motor A through the monitoring image of camera A, causing the guide cylinder A of the first cable guide to move linearly left and right, thereby neatly winding the single-core cable onto reel A. The controller controls the movement of motor B through the monitoring image of camera C, causing the guide cylinder B of the second cable guide to move linearly left and right, thus smoothly guiding the single-core cable released from reel B. SB6: When the monitoring image of camera C determines that there is no remaining single-core cable on the corresponding reel B, the controller controls the cable winding and unwinding device and motor C to stop rotating. SB7: Repeat steps SB3 to SB6 three times in sequence; SB8: Perform steps SB3 to SB4 according to the set parameters of the electric, speed-up, and speed-down rotation tests; SB9: The controller analyzes the surveillance images sent by each camera A and outputs a judgment conclusion; SB10: The controller outputs a message indicating "Full cycle test completed"; Test Item 3: No-load test, including steps SC1-SC4: SC1: Manually separate the second end of the single-core cable from reel A; SC2; The controller controls the cable winding and unwinding device through the reel control system to make reel A rotate 3 times in each direction; SC3: The controller controls the cable winding and unwinding device through the reel control system to make the reel A perform inching, speed-up, and speed-down rotation tests in sequence; each camera A sends monitoring data to the controller, and the controller outputs a judgment conclusion after image analysis; SC4: The controller outputs a message "No-load test completed".

[0016] The beneficial effects that this invention can achieve are as follows: 1. Automated testing equipment not only reduces manual labor but also reduces human interference factors during the testing process.

[0017] 2. Effectively prevents cable from being damaged by wear. During the test, the released single-core cable is collected and stored in real time, which not only avoids the problem of entanglement between adjacent single-core cables, but also saves test space.

[0018] 3. It has automated the operation, observation and judgment, improved the test quality and efficiency, and filled the gap in the lack of automated equipment for the functional test of the cable winding and unwinding device of the power distribution vehicle. Attached Figure Description

[0019] Figure 1 This is the front view of an embodiment of the present invention.

[0020] Figure 2 This is a top view of an embodiment of the present invention.

[0021] Figure 3 yes Figure 1 Enlarged view of section I.

[0022] Figure 4 yes Figure 3 Enlarged view of section II.

[0023] Figure 5 This is a schematic diagram of the accordion-style protective cover in an embodiment of the present invention.

[0024] Figure 6 yes Figure 2 Enlarged view of section III.

[0025] Figure 7 yes Figure 6 Enlarged view of section IV.

[0026] Figure 8 This is a schematic diagram of the structure of guide cylinder B in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the electrical control principle of an embodiment of the present invention.

[0028] Figure 10 This is a schematic diagram of the state in an embodiment of the present invention.

[0029] In the diagram: 1-Ground, 2-Power distribution vehicle, 3-Reel A, 4-Cable reel A, 5-Cable winding and unwinding device, 6-Reel control system, 7-Single-core cable bending section, 8-Camera B, 9-Support rod C, 10-Guide cylinder B, 11-Camera C, 12-Reel B, 13-Cable reel B, 14-Long shaft B, 15-Shaft bracket, 16-Controller, 17-Handle, 18-Handle bracket, 19-Bearing platform, 20-Universal caster, 21-Optical rod B, 22-Screw screw B, 23-Servo electric cylinder C, 24-Horizontal connecting plate B, 25-Telescopic end C, 26-Flange D, 27-Camera A, 2 8-Guide cylinder A, 29-Screw A, 30-Optical rod A, 31-Bellarm-style protective cover, 32-Single core cable, 33-Support sleeve A, 34-Telescopic end A, 35-Lower arc, 36-Support sleeve B, 37-Pattern, 38-Servo electric cylinder A, 39-Clad sleeve, 40-Connecting sleeve, 41-Motor E, 42-Flange A, 43-Flange B, 44-Cast locking pedal, 45-Motor A, 46-Horizontal connecting plate A, 47-Servo electric cylinder B, 48-Telescopic end B, 49-Motor D, 50-Shaft B, 51-Shaft A, 52-Motor B, 53-Motor C, 54-Second end. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] The direction of this technical solution is explained with the front of the power distribution vehicle as the forward direction.

[0032] A device for testing the function of a cable winding and unwinding device for a power distribution vehicle includes a mobile trolley, a controller 16 mounted on the mobile trolley, and four test units. The four test units correspond to the four-phase single-core cable reels A4 of the power distribution vehicle (A, B, C, and N phases). Each test unit includes a first cable guide, a second cable guide, and a cable reel in sequence from front to back. There is a gap between the first cable guide and the second cable guide, which is used to accommodate the single-core cable bend 7 formed by the bending and drooping of the single-core cable 32.

[0033] The mobile trolley includes a support platform 19, with swivel casters 20 at each of its four lower corners, and caster locking pedals 44 on each caster 20. A shaft bracket 15 is fixedly mounted at the rear of the support platform 19, and a long shaft B14 is fixedly mounted on the shaft bracket 15, with the length of the long shaft B14 extending along the left-right direction. A handle bracket 18 is fixedly connected to the rear of the support platform 19, and a handle 17 is fixedly mounted on the handle bracket 18, located behind the long shaft B14. A controller 16 is fixedly connected to the shaft bracket 15. The front of the support platform 19 has a lead screw A29 and a guide rod A30 extending along the left-right direction, and the rear has a lead screw B22 and a guide rod B21 extending along the left-right direction.

[0034] The cable reel section includes a reel B12, which is coaxially rotatably connected to a long shaft B14. The rotation of the reel B12 is driven by a motor C53. The motor C53 is a hollow shaft servo motor, with the hollow shaft of the motor C53 serving as the stator. The stator is fixedly connected to the long shaft B14 by bolts, and the rotor of the motor C53 is fixedly connected to the reel B12.

[0035] The first cable guide part and the bearing platform 19 form a left and right linear moving pair. The left and right linear movements of the first cable guide part are driven by motor A45. The specific mechanism is as follows: the first cable guide part includes a horizontal connecting plate A46, the motor A45 is a hollow shaft servo motor, the motor A45 is fixedly connected to the horizontal connecting plate A46, the hollow rotating shaft of the motor A45 is matched and screwed to the lead screw A29, and a guide sleeve A is fixedly provided on the horizontal connecting plate A46. The guide sleeve A is linearly slidingly connected to the light rod A30.

[0036] A vertical lifting mechanism B is provided on the horizontal connecting plate A46. The lifting end of the vertical lifting mechanism B is provided with a rotating mechanism D. The rotating mechanism D rotates around a vertical axis. The rotating end of the rotating mechanism D is provided with a pitch rotating mechanism E. The pitch rotating mechanism E rotates around a horizontal axis. The pitch end of the pitch rotating mechanism E is provided with a linear moving mechanism A. The moving direction of the linear moving mechanism A is forward and backward. The guide cylinder A28 is fixedly installed on the moving end of the linear moving mechanism A. The camera A27 is fixedly installed on the guide cylinder A28.

[0037] The vertical lifting mechanism B is a servo electric cylinder B47, which is a multi-section servo electric cylinder. The lifting end of the servo electric cylinder B47 is a telescopic end B48, and a flange B43 is provided on the telescopic end B48. The rotating mechanism D includes a motor D49, which is a servo motor. The motor D49 is fixedly connected to the flange B43. The shaft B50 of the motor D49 is vertically set, and a flange A42 is provided on the shaft B50. The pitch rotation mechanism E includes a motor E41, which is a servo motor. The motor E41 is fixedly connected to the flange A42, and the shaft A51 of the motor E41 is horizontally set. The linear movement mechanism A is a servo electric cylinder A38, which is a multi-section servo electric cylinder. The cylinder body of the servo electric cylinder A38 is fixedly connected to the shaft A51 of the motor E41. The guide cylinder A28 is fixedly connected to the telescopic end A34 of the servo electric cylinder A38 through a support sleeve A33.

[0038] The cylinder body of the servo electric cylinder A38 is fixedly connected to the connecting sleeve 40 via a ferrule 39. The connecting sleeve 40 is fixedly connected to the shaft A51 of the motor E41 via a key. A support plate 37 is welded onto the ferrule 39. The left side of the support plate 37 is fixed to the non-telescopic movable housing of the servo electric cylinder A38 via bolts and a support sleeve B36. The support plate 37 is provided with a bellows-type protective cover 31. The two ends of the opening of the bellows-type protective cover 31 are fixedly connected to the support sleeve A33 and the cylinder tail of the servo electric cylinder A38, respectively. The cross-sectional shape of the bellows-type protective cover 31 is U-shaped. The telescopic cavity of the bellows-type protective cover 31 is used to allow the single-core cable 32 to pass through. The bottom surface of the inner cavity of the bellows-type protective cover 31 is used to support the single-core cable 32. The two sides of the inner cavity of the bellows-type protective cover 31 are used to provide limits for supporting the single-core cable 32. The front end of the support plate 37 is provided with a downward arc 35. The downward arc 35 is used to prevent the bellows-type protective cover 31 from being stuck by the outer shell of the servo electric cylinder A38 during the telescopic process, which is conducive to the telescopic sliding of the lower surface of the bellows-type protective cover 31 on the support plate 37.

[0039] The second cable guide and the supporting platform 19 form a left-right linear moving pair. The left-right linear movement of the second cable guide is driven by motor B52. Specifically, the second cable guide includes a horizontal connecting plate B24, and motor B52 is a hollow shaft servo motor. Motor B52 is fixedly connected to the horizontal connecting plate B24. The hollow shaft of motor B52 is screwed to a lead screw B22. A guide sleeve B is fixedly mounted on the horizontal connecting plate B24, and the guide sleeve B is linearly slidably connected to the guide rod B21. A vertical lifting mechanism C is fixedly mounted on the horizontal connecting plate B24. The vertical lifting mechanism C is a servo electric cylinder C23, which is a multi-section servo electric cylinder. The telescopic end C25 of the servo electric cylinder C23 has a flange D26. A support rod C9 is fixedly mounted on the flange D26. The guide cylinder B10 and the camera B8 are both fixedly connected to the support rod C9, and the camera C11 is fixedly connected to the guide cylinder B10.

[0040] Both guide cylinder A28 and guide cylinder B10 are provided with a cable passage for the single-core cable 32 to pass through from front to back, and the inner hole of guide cylinder B10 is a horizontal hyperbola structure.

[0041] Cameras A27, B8, and C11 are all connected to controller 16. Camera A27 monitors the working status of the corresponding reel A3 and the arrangement of the single-core cable 32 on the reel A3. Camera B8 monitors the degree of bending of the corresponding single-core cable bend 7. Camera C11 monitors the arrangement of the single-core cable 32 on the corresponding reel B12.

[0042] The actions of motors A45, B52, C53, D49, E41, servo electric cylinders A38, B47, and C23 are all controlled by controller 16.

[0043] The controller 16 inputs the test control program, image analysis software, and self-learning adaptive program.

[0044] The test method using the device for testing the function of the cable retraction device of the power distribution vehicle in this embodiment is as follows: Open the rear door of the power distribution vehicle 2, fix the power distribution vehicle cable winding and unwinding device for functional testing at the rear of the power distribution vehicle 2, and connect the reel control system 6 of the power distribution vehicle 2 to the controller 16.

[0045] The following test items will be conducted one by one: Test item 1: Full load rotation test.

[0046] Press the "Full Load Rotation Test" button on controller 16 to start the full load rotation test, including steps SA1 to SA3: SA1; Controller 16 controls the operation of cable winding and unwinding device 5 through reel control system 6. First, it controls cable winding and unwinding device 5 to make reel A3 fully loaded with cable reel A4 and synchronously rotate forward and backward 3 times each. SA2: Control the cable winding device 5 to make the reel A3 fully loaded with the cable reel A4 and perform inching, speed-up and speed-down rotation tests in sequence; Each camera A27 sends the monitoring data to the controller 16, and the controller 16 outputs the judgment conclusion after image analysis. SA3: Controller 16 outputs an audio-visual prompt that "full load rotation test completed".

[0047] Test item two: Full cycle test.

[0048] Press the "Full Cycle Test" button on controller 16 to begin the full cycle test, including steps SB1-SB8: SB1: Manually pass the first end of the single-core cable 32 on each cable reel A4 through the guide cylinder A28, the bellows-type protective cover 31, and the guide cylinder B10 in sequence, and then fix it to the reel B12. SB2: Execute steps SB3 to SB7 according to the set parameters for uniform cable winding and unwinding; SB3: Controller 16 controls cable winding device 5 to rotate reel A3 forward at a set speed to release single-core cable 32. The controller uses monitoring images uploaded by camera B8 to determine the degree of bending of the single-core cable's bend 7. When the degree of bending of the single-core cable's bend 7 exceeds a set bending degree, controller 16 controls motor C53 to drive reel B12 to rotate and wind up the single-core cable 32, forming cable roll B13. During the winding process, controller 16 controls the speed of motor C53 based on the degree of bending of the single-core cable's bend 7 to avoid... The single-core cable 32 exerts abnormal tension on the corresponding reel A3; the controller 16 controls the operation of the motor A45 through the monitoring image of the camera A27, causing the guide cylinder A28 of the first cable guide to move linearly left and right, thereby smoothly guiding the single-core cable 32 released from the reel A3; the controller 16 controls the operation of the motor B52 through the monitoring image of the camera C11, causing the guide cylinder B10 of the second cable guide to move linearly left and right, thereby neatly winding the single-core cable 32 onto the reel B12; SB4: When the monitoring image of camera A27 determines that there is no remaining single-core cable 32 on the corresponding reel A3, controller 16 controls cable winding device 5 and motor C53 to stop rotating. SB5: Controller 16 controls cable winding device 5 to rotate reel A3 in the opposite direction at a set speed to wind up single-core cable 32, while simultaneously controlling motor C53 to drive reel B12 to rotate in the opposite direction to release single-core cable 32; during the winding process, controller 16 controls the speed of motor C53 by the degree of bending of single-core cable bending part 7 to avoid abnormal tension of single-core cable 32 on the corresponding reel A3; controller 16 controls the action of motor A45 through the monitoring image of camera A27, so that the guide cylinder A28 of the first cable guide moves linearly left and right, thereby neatly winding single-core cable 32 onto reel A3; controller 16 controls the action of motor B52 through the monitoring image of camera C11, so that the guide cylinder B10 of the second cable guide moves linearly left and right, thereby smoothly guiding the single-core cable 32 released from reel B12; SB6: When the monitoring image of camera C11 determines that there is no remaining single-core cable 32 on the corresponding reel B12, controller 16 controls cable winding device 5 and motor C53 to stop rotating. SB7: Repeat steps SB3 to SB6 three times in sequence; SB8: Perform steps SB3 to SB4 according to the set parameters of the electric, speed-up, and speed-down rotation tests; SB9: The controller 16 analyzes the surveillance images sent by each camera A27 and outputs a judgment conclusion; SB10: Controller 16 outputs an audio-visual prompt that "full cycle test completed".

[0049] Test item three: No-load test.

[0050] Press the "No-load Test" button on controller 16 to begin the no-load test, including steps SC1-SC4: SC1: Manually separate the second end 54 of the single-core cable 32 from the reel A3; SC2; Controller 16 controls the cable winding and unwinding device 5 through the reel control system 6 to make the reel A3 rotate 3 times in each direction. SC3: The controller 16 controls the cable winding and unwinding device 5 through the reel control system 6 to first make the reel A3 perform inching, speed-up and speed-down rotation tests in sequence; each camera A27 sends monitoring data to the controller 16, and the controller 16 outputs a judgment conclusion after image analysis. SC4: Controller 16 outputs an audio / video prompt saying "No-load test completed".

[0051] After the above tests are completed, the second end 54 of the single-core cable 32 is manually fixed to the reel A3. The "Cable Rewinding" button in the controller 16 is pressed, causing the controller 16 to control the relevant motors, increasing the diameter of the cable rolls A4 on each reel A3. When the image data transmitted from the camera C11 to the controller 16, i.e., the number of turns of the cable roll B13 on reel B12, approaches zero, the controller 16 controls the reel control system 6 and motor C53 to stop working, causing reels A3 and B12 to stop rotating. The controller 16 outputs a "Please disconnect the test reel connection" prompt. At this time, the single-core cable 32 is manually disconnected from the reel B12. The "Cable Rewinding End" button in the controller 16 is pressed, causing the controller 16 to control the reel control system 6 to wind the second end 54 of the single-core cable 32 into the cable roll A4 on reel A3. The controller 16 outputs an audio-visual prompt "Test Completed".

[0052] Controller 16 controls the servo electric cylinder B47 to raise or lower the guide cylinder A28 to accommodate the height of the reel A3 on the power distribution vehicle 2; controller 16 controls the motor E41 to rotate the servo electric cylinder A38 and the guide cylinder A28 around the axis A51 by a certain angle, adjusting the pitch of the guide cylinder A28 according to its relative height to the reel A3, thus minimizing the resistance of the single-core cable 32 as it passes through the guide cylinder A28 and the bellows-type protective cover 31; controller 16 controls... The operation of motor D49 can rotate guide cylinder A28 by a certain angle to adapt to the winding direction of single-core cable 32 on reel A3; controller 16 controls servo electric cylinder A38 to move guide cylinder A28 closer to or further away from cable reel A4. When the outer diameter or spacing of each reel A3 in the cable winding and unwinding device 5 of a certain power distribution vehicle 2 differs greatly from the spacing of each reel B12 in the test trolley, the extension of multi-section servo electric cylinder A38 and the rotation of servo motor B49 can compensate for this problem to adapt to normal testing.

Claims

1. A device for testing the function of a cable retraction device for a power distribution vehicle, characterized in that: The device includes a mobile trolley, a controller (16) mounted on the mobile trolley, and N test units. Each test unit includes a first cable guide, a second cable guide, and a cable reel from front to back. There is a gap between the first cable guide and the second cable guide, which is used to accommodate the single-core cable bend (7) formed by the bending and drooping of the single-core cable (32). A long shaft B (14) is fixedly mounted at the rear of the mobile trolley. The cable reel includes a reel B (12), which is coaxially rotatably connected to the long shaft B (14). The rotation of the reel B (12) is driven by a motor C (53). The mobile trolley includes a support platform (19). The first cable guide and the second cable guide both form a left-right linear movement pair with the support platform (19). The left-right linear movement of the first cable guide and the second cable guide is respectively driven by motor A (45) and motor B (56). 2) Drive; The first cable guide includes a guide cylinder A (28) and a camera A (27), and the second cable guide includes a guide cylinder B (10), a camera B (8) and a camera C (11). Both the guide cylinder A (28) and the guide cylinder B (10) are provided with a cable passage for the single-core cable (32) to pass through from front to back; the camera A (27) monitors the working status of the corresponding reel A (3) and the arrangement status of the single-core cable (32) on the reel A (3), the camera B (8) monitors the bending degree of the corresponding single-core cable bending part (7), and the camera C (11) monitors the arrangement status of the single-core cable (32) on the corresponding reel B (12); the actions of the motor A (45), the motor B (52) and the motor C (53) are all controlled by the controller (16), and the cameras A (27), B (8) and C (11) are all connected to the controller (16); The mobile trolley's carrying platform (19) is provided with a lead screw A (29) and a guide rod A (30) along the left and right directions; the first cable guide includes a horizontal connecting plate A (46), the motor A (45) is a hollow shaft servo motor, the motor A (45) is fixedly connected to the horizontal connecting plate A (46), the hollow rotating shaft of the motor A (45) is matched and screwed to the lead screw A (29), and a guide sleeve A is fixedly provided on the horizontal connecting plate A (46), and the guide sleeve A is linearly slidably connected to the guide rod A (30); The horizontal connecting plate A (46) is provided with a vertical lifting mechanism B. The lifting end of the vertical lifting mechanism B is provided with a rotating mechanism D. The rotating direction of the rotating mechanism D is around the vertical axis. The rotating end of the rotating mechanism D is provided with a pitch rotating mechanism E. The rotating direction of the pitch rotating mechanism E is around the horizontal axis. The pitch end of the pitch rotating mechanism E is provided with a linear moving mechanism A. The moving direction of the linear moving mechanism A is the front and back direction. The guide cylinder A (28) is fixedly installed at the moving end of the linear moving mechanism A. The camera A (27) is fixedly installed on the guide cylinder A (28). The vertical lifting mechanism B is a servo electric cylinder B (47), and the lifting end of the vertical lifting mechanism B is a telescopic end B (48). A flange B (43) is provided on the telescopic end B (48). The rotating mechanism D includes a motor D (49), which is fixedly connected to the flange B (43). The shaft B (50) of the motor D (49) is vertically set, and a flange A (42) is provided on the shaft B (50). The pitch rotating mechanism E includes a motor E (41), which is fixedly connected to the flange A (42). The shaft A (51) of the motor E (41) is horizontally set. The linear movement mechanism A is a servo electric cylinder A (38), and the cylinder body of the servo electric cylinder A (38) is fixedly connected to the shaft A (51) of the motor E (41). The guide cylinder A (28) is fixedly connected to the telescopic end A (34) of the servo electric cylinder A (38) through the support sleeve A (33). The cylinder body of the servo electric cylinder A (38) is fixedly connected to the shaft A (51) of the motor E (41) via a clamp (39). A support plate (37) is fixedly installed on the clamp (39), and an inverted accordion-style dust cover (31) is installed on the support plate (37). The two ends of the opening of the inverted accordion-style dust cover (31) are fixedly connected to the support sleeve A (33) and the tail of the cylinder body of the servo electric cylinder A (38), respectively. The cross-sectional shape of the accordion-style dust cover (31) is as follows: The U-shaped, bellows-style protective cover (31) has a telescopic cavity for the single-core cable (32) to pass through. The bottom surface of the inner cavity of the bellows-style protective cover (31) is used to support the single-core cable (32). The two sides of the inner cavity of the bellows-style protective cover (31) are used to provide a limit for supporting the single-core cable (32). The front end of the support plate (37) is provided with a downward arc (35), which is used to prevent the bellows-style protective cover (31) from getting stuck during the telescopic process.

2. The device for functional testing of the cable retraction device for a power distribution vehicle according to claim 1, characterized in that: The mobile trolley's carrying platform (19) is provided with a lead screw B (22) and a guide bar B (21) along the left and right directions; the second cable guide includes a horizontal connecting plate B (24), the motor B (52) is a hollow shaft servo motor, the motor B (52) is fixedly connected to the horizontal connecting plate B (24), the hollow rotating shaft of the motor B (52) is matched and screwed to the lead screw B (22), and a guide sleeve B is fixedly provided on the horizontal connecting plate B (24), and the guide sleeve B is linearly slidably connected to the guide bar B (21).

3. The device for functional testing of the cable retraction device for a power distribution vehicle according to claim 2, characterized in that: A vertical lifting mechanism C is fixedly provided on the horizontal connecting plate B (24). The guide cylinder B (10) and the camera B (8) are both fixedly connected to the lifting end of the vertical lifting mechanism C. The camera C (11) is fixedly connected to the guide cylinder B (10).

4. The device for functional testing of the cable retraction device for a power distribution vehicle according to claim 3, characterized in that: The vertical lifting mechanism C is a servo electric cylinder C (23). The telescopic end C (25) of the servo electric cylinder C (23) is provided with a flange D (26). A support rod C (9) is fixedly provided on the flange D (26). The guide cylinder B (10) and the camera B (8) are both fixedly connected to the support rod C (9).

5. The device for functional testing of the cable retraction device for a power distribution vehicle according to claim 1, characterized in that: The four corners of the support platform (19) are equipped with swivel casters (20), and the swivel casters (20) are equipped with caster locking pedals (44); the rear of the support platform (19) is fixedly connected to a handle bracket (18), and a handle (17) is fixed on the handle bracket (18).

6. A functional test method for a cable retraction device for a power distribution vehicle, characterized in that: Open the rear door of the power distribution vehicle (2), fix the power distribution vehicle cable winding and unwinding device for functional testing as described in any one of claims 1-5 to the rear of the power distribution vehicle (2), and connect the reel control system (6) of the power distribution vehicle (2) to the controller (16); perform the following tests one by one: Test Item 1: Full-load rotation test, including steps SA1 to SA3: SA1; The controller (16) controls the operation of the cable winding and unwinding device (5) through the reel control system (6). First, the cable winding and unwinding device (5) is controlled to make the reel A (3) fully loaded with cable reel A (4) synchronously rotate forward and backward 3 times each. SA2: Control the cable winding device (5) to make the reel A (3) fully loaded with cable reel A (4) and perform jogging, speed-up and speed-down rotation tests in sequence; each camera A (27) sends the monitoring data to the controller (16), and the controller (16) outputs the judgment conclusion after image analysis; SA3: The controller (16) outputs a message saying "Full load rotation test completed"; Test Item 2: Full Cycle Test, including steps SB1-SB8: SB1: Manually pass the first end of the single-core cable (32) on each cable reel A (4) through the guide cylinder A (28) and the guide cylinder B (10) in sequence, and then fix it to the reel B (12); SB2: Execute steps SB3 to SB7 according to the set parameters for uniform cable winding and unwinding; SB3: The controller (16) controls the cable winding device (5) to make the reel A (3) rotate forward at a set speed to release the single-core cable (32). The controller determines the degree of bending of the single-core cable bend (7) by the monitoring image uploaded by the camera B (8). When the degree of bending of the single-core cable bend (7) is greater than the set degree of bending, the controller (16) controls the motor C (53) to drive the reel B (12) to rotate and wind up the single-core cable (32). During the winding process, the controller (16) controls the speed of the motor C (53) by the degree of bending of the single-core cable bend (7) to prevent the single-core cable (32) from being wound up. 2) An abnormal tension is applied to the corresponding reel A (3); the controller (16) controls the action of the motor A (45) through the monitoring image of the camera A (27), so that the guide cylinder A (28) of the first cable guide moves linearly left and right, thereby smoothly guiding the single-core cable (32) released from the reel A (3); the controller (16) controls the action of the motor B (52) through the monitoring image of the camera C (11), so that the guide cylinder B (10) of the second cable guide moves linearly left and right, thereby neatly gathering the single-core cable (32) onto the reel B (12); SB4: When the monitoring image of camera A (27) determines that there is no remaining single-core cable (32) on the corresponding reel A (3), the controller (16) controls the cable winding device (5) and motor C (53) to stop rotating. SB5: The controller (16) controls the cable winding device (5) to make the reel A (3) rotate in the opposite direction according to the set speed to wind up the single-core cable (32), while controlling the motor C (53) to drive the reel B (12) to rotate in the opposite direction to release the single-core cable (32); during the winding process, the controller (16) controls the speed of the motor C (53) by the degree of bending of the single-core cable (7) to avoid the single-core cable (32) from forming abnormal tension on the corresponding reel A (3); the controller (16) uses a camera to... The monitoring image of head A (27) controls the action of motor A (45), causing the guide cylinder A (28) of the first cable guide to move linearly left and right, thereby neatly winding the single-core cable (32) onto reel A (3); the controller (16) controls the action of motor B (52) through the monitoring image of camera C (11), causing the guide cylinder B (10) of the second cable guide to move linearly left and right, so that the guide cylinder B (10) smoothly guides the single-core cable (32) released from reel B (12); SB6: When the monitoring image of camera C (11) determines that there is no remaining single-core cable (32) on the corresponding reel B (12), the controller (16) controls the cable winding and unwinding device (5) and the motor C (53) to stop rotating. SB7: Repeat steps SB3 to SB6 three times in sequence; SB8: Perform steps SB3 to SB4 according to the set parameters of the electric, speed-up, and speed-down rotation tests; SB9: The controller (16) analyzes the monitoring images sent by each camera A (27) and outputs a judgment conclusion; SB10: The controller (16) outputs a message indicating "Full cycle test completed"; Test Item 3: No-load test, including steps SC1-SC4: SC1: Manually separate the second end (54) of the single-core cable (32) from the reel A (3); SC2; The controller (16) controls the cable winding device (5) through the reel control system (6) to make the reel A (3) rotate forward and backward 3 times each; SC3: The controller (16) controls the cable winding device (5) through the reel control system (6) to first make the reel A (3) perform jogging, speed-up and speed-down rotation tests in sequence; each camera A (27) sends the monitoring data to the controller (16), and the controller (16) outputs the judgment conclusion after image analysis; SC4: The controller (16) outputs the message "No-load test completed".

Images