CN117054336A - Precise automatic detection device for electric cable section cracks and application method thereof - Google Patents
Precise automatic detection device for electric cable section cracks and application method thereof Download PDFInfo
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- CN117054336A CN117054336A CN202310986104.3A CN202310986104A CN117054336A CN 117054336 A CN117054336 A CN 117054336A CN 202310986104 A CN202310986104 A CN 202310986104A CN 117054336 A CN117054336 A CN 117054336A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a precise automatic detection device for a crack of a section of an electric cable and a use method thereof, and relates to the technical field of detecting the crack on the electric cable and marking the position of the crack; the upper clamping and straightening mechanism comprises a square frame and two L-shaped plates fixedly arranged on the bottom surface of the portal frame beam, two frames of the square frame are respectively and slidably arranged on two guide posts, and springs are sleeved on the two guide posts; the upper clamping and straightening mechanism further comprises vertical air cylinders which are fixedly arranged on the bottom surface of the cross beam and positioned on the left side and the right side of the through hole A, pressure heads are fixedly arranged on piston rods of the two vertical air cylinders, the two pressure heads are respectively propped against the top surfaces of the two frames of the square frame, and under the propping pressure of the pressure heads, the springs are compressed between the square frame and the L plate. The beneficial effects of the invention are as follows: compact structure, greatly improve crack detection precision, alleviate workman working strength.
Description
Technical Field
The invention relates to the technical field of detecting cracks on an electric cable and marking crack positions, in particular to a precise automatic detection device for the section cracks of the electric cable and a use method thereof.
Background
The power cable is commonly used for urban underground power grids, power station leading-out lines, power supply in industrial and mining enterprises and power transmission lines under sea water passing through the river. In the electric power line, the proportion of the electric cable is gradually increasing, and the electric power cable is a cable product for transmitting and distributing high-power electric energy in the main line of the electric power system.
The electric cable is produced and molded through an extrusion molding machine by an extrusion process, and the molded electric cable is wound on a winding drum. Because of the reason of the manufacturing process, the cross section of the outer sheath of the power cable 1 is distributed with the cracks 2, as shown in fig. 1-2, the service life of the whole power cable is seriously influenced by the existence of the cracks 2, therefore, workers in the workshop firstly detect the positions of the cracks 2 on the power cable 1 through the detection device, then Mark the positions of the cracks 2 manually through Mark pens, and after all the cracks 2 are detected, the workers repair the cracks 2 at the marked positions.
The structure of the detection device used in the workshop is shown in fig. 3-4, the detection device comprises a workbench 3 and a portal frame 4 fixedly arranged on the top surface of the workbench 3, a support 5 is fixedly arranged on the top surface of a cross beam of the portal frame 4, a mounting frame is fixedly arranged on the top of the support 5, a winding drum 6 is arranged on the mounting frame, a plurality of circles of power cables 1 to be detected are wound on the winding drum 6, through holes A7 are formed in the cross beam of the portal frame 4, a frame 8 positioned on the cross beam is fixedly arranged on the left side and the right side of the through holes A7, a driving wheel 9 and a guide wheel 10 are respectively rotatably arranged on the two frames 8, a driving motor is fixedly arranged on one frame 8, and the driving motor is connected with a rotating shaft of the driving wheel 9; the table top of the workbench 3 is provided with a through hole B12, a plurality of CCD lenses 27 fixedly arranged on the workbench 3 are arranged in the circumferential direction of the through hole B12, and the driving motor and each CCD lens 27 are connected with the controller.
The method for detecting the crack 2 on the electric cable by the detection device comprises the following steps:
s1, a worker pulls the head end of the power cable 1 on the winding drum 6 downwards, and then sequentially passes the head end of the power cable 1 through an area surrounded by the driving wheel 9 and the guide wheel 10, a through hole A7 and a through hole B12, wherein the lower end of the power cable 1 is just located in the area surrounded by each CCD lens 27;
s2, each CCD lens 27 detects a crack 2 on the peripheral surface of the lower end part of the electric cable 1, as shown in FIG. 5, if the crack 2 of the electric cable 1 is detected, the CCD lens 27 sends an electric signal to the controller, the controller sends an alarm signal, and a worker draws a line on the outer surface of the lower end part of the electric cable 1 by using a Mark pen at the moment to indicate that the crack 2 exists at the position; if the CCD lens 27 does not send out an electric signal to the controller, the fact that the peripheral surface of the lower end part of the electric power cable 1 is free of cracks 2 is indicated, and a worker does not need to use Mark to stroke lines;
s3, after waiting for a period of time, the controller controls the driving motor to start, the driving motor drives the driving wheel 9 to rotate, the power cable 1 on the winding drum 6 is unwound downwards under the driving of the driving wheel 9 and the guide wheel 10, after a certain distance of unwinding, the controller controls the driving motor to be closed, at the moment, the detected power cable 1 section falls below the workbench 3, meanwhile, the undetected power cable 1 section enters into the area surrounded by each CCD lens 27, and the operation of the step S2 is repeated, so that the second section of the power cable 1 can be continuously detected;
s4, repeating the operation of the step S3, so that the crack 2 on the section of the whole power cable 1 can be continuously detected; finally, the worker repairs the cracks 2 at the respective marking positions on the power cable 1.
However, although the detection device used in the workshop can detect the cracks, the following technical drawbacks still exist in the actual use process:
I. the gap width of some cracks 2 on the electric cable 1 is quite small, and the CCD lens 27 cannot identify the small-width cracks 2 at all, so that the small-width cracks 2 are not marked, the technical defect that the detection of the cracks 2 is incomplete exists, and the detection precision is greatly reduced.
II. When the CCD lens 27 recognizes the cracks 2, it is necessary to manually scribe lines on the outer surface of the power cable 1 with Mark pens, and the number of the cracks 2 is large, and the cracks are manually marked one by one with Mark pens, which certainly increases the work intensity of workers. Furthermore, a plurality of CCD lenses 27 need to be arranged on the table 3 to complete the detection of the power cable 1, which certainly increases the detection cost of the crack 2. Therefore, there is a need for a precise automatic detection device that greatly improves the crack detection accuracy and reduces the work intensity of workers.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a precise automatic detection device for the section cracks of the power cable, which has a compact structure, greatly improves the crack detection precision and lightens the working strength of workers, and a use method thereof.
The aim of the invention is achieved by the following technical scheme: the utility model provides a accurate automatic checkout device of electric cable cross section crack, it includes the workstation, set firmly the portal frame on the workstation top surface, set firmly the support on the top surface of portal frame crossbeam, the top of support sets firmly the mounting bracket, install on the mounting bracket and receive the reel, it has the electric cable of many circles waiting to detect to receive on the reel, set up through-hole A on the crossbeam of portal frame, the frame on the crossbeam is all set firmly to the left and right sides of through-hole A, drive wheel and leading wheel have been installed to the rotation respectively on two frames, wherein, set firmly driving motor on the frame, driving motor is connected with the pivot of drive wheel, set up through-hole B on the mesa of workstation, the below of through-hole A is provided with the centre gripping and straightens the mechanism, the top of through-hole B is provided with down centre gripping and crack detection mechanism; the upper clamping and straightening mechanism comprises a square frame and two L-shaped plates fixedly arranged on the bottom surface of the portal frame beam, the two L-shaped plates are respectively arranged on the left side and the right side of the through hole A, guide posts are fixedly arranged on the top surfaces of the two L-shaped plates, two frames of the square frame are respectively and slidably arranged on the two guide posts, springs are respectively sleeved on the two guide posts, one ends of the springs are fixedly arranged on the L-shaped plates, the other ends of the springs are fixedly arranged on the bottom surface of the square frame, clamping cylinders A are fixedly arranged in the square frame and on the left side wall and the right side wall of the square frame, and clamping heads A are fixedly arranged on the acting ends of piston rods of the two clamping cylinders A;
the upper clamping and straightening mechanism further comprises vertical air cylinders which are fixedly arranged on the bottom surface of the cross beam and positioned on the left side and the right side of the through hole A, pressure heads are fixedly arranged on piston rods of the two vertical air cylinders, the two pressure heads are respectively propped against the top surfaces of the two frames of the square frame, and under the propping pressure of the pressure heads, the springs are compressed between the square frame and the L plate.
The lower clamping and crack detecting mechanism comprises an arch frame fixedly arranged on the table top of the workbench, a hollow pipe rotatably arranged at the top of the arch frame and a driving unit arranged on the bottom surface of the arch frame, wherein the hollow pipe is arranged right above the through hole B, a driven gear is fixedly arranged on the outer wall of the hollow pipe and connected with the driving unit, vertical plates are fixedly arranged on the bottom surface of the driven gear and on the left side and the right side of the hollow pipe, a CCD lens which is horizontally arranged is fixedly arranged on the vertical plate on the left side, a feeding cylinder is fixedly arranged on the vertical plate on the right side, a Mark pen is fixedly arranged on a piston rod of the feeding cylinder, and a pen point of the Mark pen is arranged towards the CCD lens;
the lower clamping and crack detection mechanism further comprises clamping air cylinders B which are fixedly arranged on the workbench and positioned on the left side and the right side of the through hole B, and clamping heads B are fixedly arranged at the acting ends of piston rods of the two clamping air cylinders B.
The bearing seat is fixedly arranged on the bottom surface of the arch frame, the hollow tube is rotatably arranged in the bearing seat, and the hollow tube penetrates through the arch frame.
The driving unit comprises a servo motor fixedly arranged on the arch frame and a driving gear arranged on an output shaft of the servo motor, and the driving gear is meshed with the driven gear.
A connecting plate is fixedly arranged at the acting end of the piston rod of the feeding cylinder, and the Mark pen is fixedly arranged on the connecting plate.
The top of the bracket is provided with a through groove.
The two clamping cylinders A are arranged in bilateral symmetry, and the two clamping cylinders B are arranged in bilateral symmetry.
The structure of the chuck A is the same as that of the chuck B, and arc grooves are formed in the inner end faces of the chuck A and the chuck B.
The detection device further comprises a controller, wherein the controller is electrically connected with the driving motor, the CCD lens, the electromagnetic valve of the feeding cylinder, the electromagnetic valve of the clamping cylinder A and the electromagnetic valve of the clamping cylinder B through signal wires.
The application method of the precise automatic detection device for the electric cable section cracks comprises the following steps:
s1, pulling out the head end of the electric cable on a winding drum downwards by a worker, sequentially passing the head end of the electric cable through a through groove of a bracket, an area surrounded by a driving wheel and a guide wheel, a through hole A, an area surrounded by two chucks A and a hollow pipe cavity, and ensuring that the head end of the electric cable is positioned in the area surrounded by two chucks B after passing through the hollow pipe, wherein the lower end of the electric cable is just positioned between a CCD lens and a Mark pen;
s2, detecting cracks on the peripheral surface of the lower end part of the electric cable, wherein the specific operation steps are as follows:
s21, clamping the head end part of the power cable: the worker controls the piston rods of the two clamping cylinders B to extend, the piston rods drive the clamping heads B to move towards the head end part of the electric cable, and when the piston rods of the clamping cylinders B extend completely, the head end part of the electric cable is just clamped between the two clamping heads B;
s22, clamping the upper end part of the power cable: the worker controls the piston rods of the two clamping cylinders A to extend out, the piston rods drive the clamping heads A to move towards the upper end of the power cable, and when the piston rods of the clamping cylinders A extend out completely, the upper end of the power cable is just clamped between the two clamping heads A;
s23, straightening the power cable: the worker controls the piston rods of the two vertical cylinders to retract upwards, the piston rods drive the pressure heads to move upwards, the square frame moves upwards along the guide posts under the action of the restoring force of the springs in the separation process of the pressure heads and the square frame, the square frame drives the two clamping cylinders A and the two clamping heads A to synchronously move upwards, and the two clamping heads A drive the clamped electric power cable to move upwards, so that the electric power cable is straightened;
s24, controlling a servo motor to do forward rotation, enabling the servo motor to drive a driving gear to rotate, enabling the driving gear to drive a driven gear to rotate, enabling the driven gear to rotate around the axis of a hollow pipe, enabling two vertical plates to rotate around an electric power cable, enabling a CCD lens and a Mark pen to synchronously rotate, enabling the CCD lens to shoot the peripheral surface of the lower end of the electric power cable in real time when the CCD lens rotates around the lower end of the electric power cable, enabling the CCD lens to send an electric signal to a controller if the CCD lens detects a crack on the peripheral surface of the lower end of the electric power cable, enabling a piston rod of a feeding cylinder to extend, enabling the piston rod of the feeding cylinder to drive the Mark pen to move towards the direction of the electric power cable so that a pen point of the Mark pen contacts with the surface of the electric power cable, enabling the servo motor to do reverse rotation, enabling the driven gear to drive the CCD lens and the Mark pen to reset, enabling the Mark pen to draw a transverse line on the peripheral surface of the lower end of the electric power cable in the reset process, and controlling retraction of the piston rod of the feeding cylinder after marking the position of the crack is good;
if the CCD lens rotates for one circle, and no crack is detected, the controller controls the servo motor to reversely rotate, the servo motor drives the driven gear to reversely rotate, and the driven gear drives the CCD lens and the Mark pen to reset, so that the crack on the peripheral surface of the lower end part of the power cable is finally detected;
s3, after detection, controlling piston rods of the two clamping cylinders A to retract, separating the two chucks A from the power cable, then controlling piston rods of the two clamping cylinders B to retract, separating the two chucks B from the power cable, and after separation, controlling piston rods of the two vertical cylinders to extend downwards, wherein the piston rods drive the pressure head to move downwards, the pressure head downwards presses the square frame, and the square frame downwards compresses the spring along the guide post;
s4, a worker controls a driving motor to start, the driving motor drives a driving wheel to rotate, the power cable on the winding drum is unwound downwards under the driving of the driving wheel and the guide wheel, after the power cable is unwound for a certain distance, a controller controls the driving motor to be closed, at the moment, a detected power cable section falls below a workbench through a through hole B, meanwhile, an undetected power cable section enters a detection area of a CCD lens, the operation of the step S2 is repeated, and the second section of the power cable can be continuously detected;
s5, repeating the operation of the step S4, detecting the cracks on the section of the whole power cable continuously, and repairing the cracks where the transverse lines are drawn on the power cable by workers.
The invention has the following advantages: compact structure, greatly improve crack detection precision, alleviate workman working strength.
Drawings
Fig. 1 is a schematic structural diagram of a power cable;
FIG. 2 is an enlarged schematic view of part I of FIG. 1;
FIG. 3 is a schematic diagram of a detection device used in a workshop;
FIG. 4 is a schematic view of the A-direction of FIG. 3;
FIG. 5 is a schematic diagram illustrating the operation of the detecting device in FIG. 3 to detect a crack;
FIG. 6 is a schematic diagram of the structure of the present invention;
FIG. 7 is a schematic diagram of the main section of FIG. 6;
FIG. 8 is a schematic illustration of the connection of the drive wheel, guide wheel and frame;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a schematic view of the structure of the upper clamping and straightening mechanism;
FIG. 11 is a schematic view in section B-B of FIG. 10;
FIG. 12 is a schematic view of a lower clamping and crack detection mechanism;
FIG. 13 is a schematic view of the structure of the chuck B;
FIG. 14 is a schematic diagram of a power cable drawn to a detection zone of a CCD lens;
fig. 15 is a schematic view of two grippers B holding the head end of the power cable;
fig. 16 is a schematic view of two grippers a holding the upper end of the power cable;
FIG. 17 is a schematic diagram of the ram after separation from the block;
in the figure:
the device comprises a 1-power cable, 2-cracks, a 3-workbench, a 4-portal frame, a 5-bracket, a 6-winding drum, a 7-through hole A, an 8-rack, 9-driving wheels, 10-guiding wheels, 11-driving motors, 12-through holes B, 13-upper clamping and straightening mechanisms, 14-lower clamping and crack detection mechanisms, 15-square frames, 16-L plates, 17-guiding columns, 18-springs, 19-clamping cylinders A, 20-clamping heads A, 21-vertical cylinders and 22-pressure heads;
23-arch frame, 24-hollow tube, 25-driven gear, 26-vertical plate, 27-CCD lens, 28-feeding cylinder, 29-Mark pen, 30-clamping cylinder B, 31-clamping head B, 32-servo motor, 33-driving gear and 34-arc groove.
Detailed Description
The invention is further described below with reference to the accompanying drawings, the scope of the invention not being limited to the following:
as shown in fig. 6-13, an automatic detection device for the section cracks of the electric power cable comprises a workbench 3, a portal frame 4 fixedly arranged on the top surface of the workbench 3, a bracket 5 fixedly arranged on the top surface of a cross beam of the portal frame 4, a through groove formed in the top of the bracket 5, a mounting frame fixedly arranged on the top of the bracket 5, a winding drum 6 arranged on the mounting frame, a plurality of circles of electric power cables 1 to be detected wound on the winding drum 6, through holes A7 formed in the cross beam of the portal frame 4, a rack 8 arranged on the cross beam and fixedly arranged on the left side and the right side of the through holes A7, a driving wheel 9 and a guide wheel 10 respectively and rotatably arranged on the two racks 8, wherein a driving motor 11 is fixedly arranged on one rack 8 and connected with a rotating shaft of the driving wheel 9, a through hole B12 formed in the table top of the workbench 3, an upper clamping and straightening mechanism 13 and a lower clamping and crack detection mechanism 14 arranged above the through hole B12.
As shown in fig. 6-13, the upper clamping and straightening mechanism 13 includes a square frame 15, two L plates 16 fixedly arranged on the bottom surface of the beam of the portal frame 4, the two L plates 16 are respectively arranged on the left side and the right side of the through hole A7, the top surfaces of the two L plates 16 are respectively fixedly provided with guide posts 17, two frames of the square frame 15 are respectively slidably mounted on the two guide posts 17, springs 18 are respectively sleeved on the two guide posts 17, one ends of the springs 18 are fixedly arranged on the L plates 16, the other ends of the springs 18 are fixedly arranged on the bottom surface of the square frame 15, clamping cylinders a19 are respectively and symmetrically arranged in the square frame 15 and on the left side wall and the right side wall of the square frame, clamping heads a20 are respectively and fixedly arranged on the acting ends of piston rods of the two clamping cylinders a19, the upper clamping and straightening mechanism 13 also includes vertical cylinders 21 fixedly arranged on the bottom surface of the beam and on the left side and the right side of the through hole A7, pressure heads 22 are respectively pressed against the top surfaces of the two frames of the square frame 15, and the springs 22 are pressed against the square frame 16.
The lower clamping and crack detecting mechanism 14 comprises an arch frame 23 fixedly arranged on the table surface of the workbench 3, a hollow pipe 24 rotatably arranged at the top of the arch frame 23 and a driving unit arranged on the bottom surface of the arch frame 23, a bearing seat is fixedly arranged on the bottom surface of the arch frame 23, the hollow pipe 24 is rotatably arranged in the bearing seat, the hollow pipe 24 penetrates through the arch frame 23 and is arranged right above the through hole B12, a driven gear 25 is fixedly arranged on the outer wall of the hollow pipe 24, the driven gear 25 is connected with the driving unit, vertical plates 26 are fixedly arranged on the bottom surface of the driven gear 25 and positioned on the left side and the right side of the hollow pipe 24, a horizontally arranged CCD lens 27 is fixedly arranged on the vertical plate 26 positioned on the left side, a feeding cylinder 28 is fixedly arranged on the vertical plate 26 positioned on the right side, a Mark pen 29 is fixedly arranged on a piston rod of the feeding cylinder 28, and a pen point of the Mark pen 29 is arranged towards the CCD lens 27; the driving unit comprises a servo motor 32 fixedly arranged on the arch frame 23 and a driving gear 33 arranged on an output shaft of the servo motor 32, wherein the driving gear 33 is meshed with the driven gear 25.
The lower clamping and crack detecting mechanism 14 further comprises clamping air cylinders B30 fixedly arranged on the workbench 3 and positioned at the left side and the right side of the through hole B12, the two clamping air cylinders B30 are arranged in bilateral symmetry, clamping heads B31 are fixedly arranged at the acting ends of piston rods of the two clamping air cylinders B30, the clamping heads A20 and the clamping heads B31 are identical in structure, and arc-shaped grooves 34 are formed in inner end faces of the clamping heads A20 and the clamping heads B31. A connecting plate is fixedly arranged at the acting end of the piston rod of the feeding cylinder 28, and the Mark pen 29 is fixedly arranged on the connecting plate.
The detection device further comprises a controller, the controller is electrically connected with the driving motor 11, the CCD lens 27, the electromagnetic valve of the feeding cylinder 28, the electromagnetic valve of the clamping cylinder A19 and the electromagnetic valve of the clamping cylinder B30 through signal wires, the extension or retraction of piston rods of the clamping cylinder A19 and the clamping cylinder B30 of the feeding cylinder 28 can be controlled through the controller, and meanwhile the starting or closing of the driving motor 11 and the servo motor 32 can be controlled, so that the detection device has the characteristic of high automation degree.
The application method of the precise automatic detection device for the electric cable section cracks comprises the following steps:
s1, the head end of the electric cable 1 on the winding drum 6 is pulled downwards by a worker, then the head end of the electric cable 1 sequentially passes through a through groove of the bracket 5, an area surrounded by the driving wheel 9 and the guide wheel 10, a through hole A7, an area surrounded by the two chucks A20 and a cavity of the hollow tube 24, when the head end of the electric cable 1 passes through the hollow tube 24, the area surrounded by the two chucks B31 where the head end of the electric cable 1 is positioned is ensured, and at the moment, the lower end of the electric cable 1 is just positioned between the CCD lens 27 and the Mark pen 29, as shown in FIG. 14;
s2, detecting cracks 2 on the peripheral surface of the lower end part of the electric cable 1, wherein the specific operation steps are as follows:
s21, clamping the head end part of the electric cable 1: the worker controls the piston rods of the two clamping cylinders B30 to extend, the piston rods drive the clamping heads B31 to move towards the head end part of the power cable 1, and when the piston rods of the clamping cylinders B30 extend completely, the head end part of the power cable 1 is just clamped between the two clamping heads B31, as shown in FIG. 15;
s22, clamping the upper end part of the power cable 1: the worker controls the piston rods of the two clamping cylinders A19 to extend, the piston rods drive the clamping heads A20 to move towards the upper end of the power cable 1, and when the piston rods of the clamping cylinders A19 extend completely, the upper end of the power cable 1 is just clamped between the two clamping heads A20, as shown in FIG. 16;
s23, straightening the power cable 1: the worker controls the piston rods of the two vertical cylinders 21 to retract upwards, the piston rods drive the pressure heads 22 to move upwards, in the process of separating the pressure heads 22 from the square frames 15, as shown in fig. 17, the square frames 15 move upwards along the guide posts 17 under the action of the restoring force of the springs 18, the square frames 15 drive the two clamping cylinders A19 and the two clamping heads A20 to synchronously move upwards, and the two clamping heads A20 drive the clamped power cable 1 to move upwards, so that the power cable 1 is straightened;
s24, controlling a servo motor 32 to rotate positively, driving a driving gear 33 to rotate, driving the driving gear 33 to drive a driven gear 25 to rotate, enabling the driven gear 25 to rotate around the axis of a hollow pipe 24, simultaneously enabling a driven gear 25 to drive two vertical plates 26 to rotate around a power cable 1, enabling the vertical plates 26 to drive a CCD lens 27 and a Mark pen 29 to rotate synchronously, when the CCD lens 27 rotates around the lower end of the power cable 1, shooting the peripheral surface of the lower end of the power cable 1 in real time by the CCD lens 27 as shown by an arrow in FIG. 17, enabling the CCD lens 27 to send an electric signal to a controller if the CCD lens 27 detects a crack 2 on the peripheral surface of the lower end of the power cable 1, enabling the controller to control a piston rod of a feeding cylinder 28 to extend, enabling a Mark pen 29 to move towards the direction of the power cable 1 so as to enable a pen tip of the Mark pen 29 to be in contact with the surface of the power cable 1, enabling the controller to control the servo motor 32 to rotate reversely, enabling the driven gear 25 to drive the CCD lens 27 and the Mark pen 29 to reset, enabling the CCD lens 27 to pick up the peripheral surface of the power cable 1 in real time, enabling the Mark pen 29 to be well separated from the lower end of the power cable 1 in the reset process, and enabling the Mark pen 29 to be well separated from the power cable 2;
if the crack 2 is not detected after the CCD lens 27 rotates for one circle, the controller controls the servo motor 32 to rotate reversely, the servo motor 32 drives the driven gear 25 to rotate reversely, and the driven gear 25 drives the CCD lens 27 and the Mark pen 29 to reset, so that the crack 2 on the peripheral surface of the lower end part of the power cable 1 is finally detected;
in the process of detecting the crack 2 in the step S2, the front end portion of the electric cable 1 is firstly clamped by the two chucks B31, then the upper end portion of the electric cable 1 is clamped by the two chucks a20, and finally the section of the electric cable 1 located between the chucks a20 and B31 is straightened by the restoring force of the spring 18, so that the small-width crack 2 on the section of the electric cable 1 becomes larger, the contour of the crack 2 can be more clearly shot by the CCD lens 27, and the small-width crack can be accurately identified by the CCD lens 27, therefore, compared with the detection device shown in fig. 3-4 in a workshop, the detection device can identify the small-width crack, the detection is more thorough, and the detection precision of the crack is greatly improved.
In addition, in step S24, when the CCD lens 27 detects that the crack 2 exists, the piston rod of the feeding cylinder 28 is controlled to extend so that the nib of the Mark pen 29 contacts with the power cable 1, and then the servo motor 32 is controlled to rotate reversely, so that a transverse line can be drawn at the position with the crack 2 to Mark the crack 2, and therefore, compared with the detection device shown in fig. 3-4 in the workshop, the detection device does not need to be marked manually, thereby greatly reducing the working intensity of workers and having the characteristic of high automation degree.
S3, after detection, controlling piston rods of the two clamping cylinders A19 to retract, separating the two clamping heads A20 from the power cable 1, subsequently controlling piston rods of the two clamping cylinders B30 to retract, separating the two clamping heads B31 from the power cable 1, and after separation, controlling piston rods of the two vertical cylinders 21 to extend downwards, wherein the piston rods drive the pressure heads 22 to move downwards, the pressure heads 22 downwards press the square frames 15, and the square frames 15 downwards compress the springs 18 along the guide posts 17;
s4, a worker controls a driving motor 11 to start, the driving motor 11 drives a driving wheel 9 to rotate, the power cable 1 on the winding drum 6 is unwound downwards under the driving of the driving wheel 9 and a guide wheel 10, after a certain distance is unwound, a controller controls the driving motor 11 to be closed, at the moment, a detected power cable 1 section falls below the workbench 3 through a through hole B12, meanwhile, an undetected power cable 1 section enters a detection area of the CCD lens 27, and the operation of the step S2 is repeated, so that the second section of the power cable 1 can be continuously detected;
and S5, repeating the operation of the step S4, so that the cracks 2 on the section of the whole power cable 1 can be continuously detected, and finally, the workers repair the cracks 2 on the power cable 1 where the transverse lines are drawn.
In the whole process of detecting the cracks, only the CCD lens 27 of the lower clamping and crack detecting mechanism 14 rotates around the circumference of the power cable 1 to finish detection of a small section of the power cable 1, and a plurality of CCD lenses 27 are not needed to be used for detection, so that the detection cost is greatly saved.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a accurate automatic checkout device of electric cable cross-section crack, it includes workstation (3), set firmly portal frame (4) on workstation (3) top surface, set firmly support (5) on the top surface of portal frame (4) crossbeam, the top of support (5) has set firmly the mounting bracket, install on the mounting bracket and receive reel (6), the winding has power cable (1) that many rings wait to detect on the reel (6), through-hole A (7) have been seted up on the crossbeam of portal frame (4), frame (8) on the crossbeam are all set firmly on the left and right sides of through-hole A (7), drive wheel (9) and leading wheel (10) are installed in the rotation respectively on two frames (8), wherein, set firmly driving motor (11) on frame (8), driving motor (11) are connected with the pivot of drive wheel (9), through-hole B (12) have been seted up on the mesa of workstation (3), its characterized in that:
an upper clamping and straightening mechanism (13) is arranged below the through hole A (7), and a lower clamping and crack detecting mechanism (14) is arranged above the through hole B (12); the upper clamping and straightening mechanism (13) comprises a square frame (15) and two L plates (16) fixedly arranged on the bottom surface of a cross beam of the portal frame (4), the two L plates (16) are respectively arranged on the left side and the right side of the through hole A (7), guide posts (17) are fixedly arranged on the top surfaces of the two L plates (16), two frames of the square frame (15) are respectively and slidably arranged on the two guide posts (17), springs (18) are respectively sleeved on the two guide posts (17), one end of each spring (18) is fixedly arranged on the L plate (16), the other end of each spring is fixedly arranged on the bottom surface of the square frame (15), clamping cylinders A (19) are respectively and fixedly arranged in the left side wall and the right side wall of the square frame (15), and clamping chucks A (20) are respectively and fixedly arranged at the acting ends of piston rods of the two clamping cylinders A (19);
the upper clamping and straightening mechanism (13) further comprises vertical air cylinders (21) which are fixedly arranged on the bottom surface of the cross beam and positioned on the left side and the right side of the through hole A (7), pressure heads (22) are fixedly arranged on piston rods of the two vertical air cylinders (21), the two pressure heads (22) respectively support against the top surfaces of the two frames of the square frame (15), and under the support of the pressure heads (22), springs (18) are compressed between the square frame (15) and the L plate (16).
2. The automatic precise detection device for the cross-section cracks of the power cable according to claim 1, wherein: the lower clamping and crack detecting mechanism (14) comprises an arch frame (23) fixedly arranged on the table top of the workbench (3), a hollow tube (24) rotatably arranged at the top of the arch frame (23) and a driving unit arranged on the bottom surface of the arch frame (23), wherein the hollow tube (24) is arranged right above the through hole B (12), a driven gear (25) is fixedly arranged on the outer wall of the hollow tube (24), the driven gear (25) is connected with the driving unit, vertical plates (26) are fixedly arranged on the bottom surface of the driven gear (25) and are positioned on the left side and the right side of the hollow tube (24), a horizontally arranged CCD lens (27) is fixedly arranged on the vertical plate (26) positioned on the left side, a feeding cylinder (28) is fixedly arranged on a piston rod of the feeding cylinder (28), and a pen point of the Mark pen (29) is arranged towards the CCD lens (27);
the lower clamping and crack detection mechanism (14) further comprises clamping air cylinders B (30) which are fixedly arranged on the workbench (3) and positioned on the left side and the right side of the through hole B (12), and clamping heads B (31) are fixedly arranged at the acting ends of piston rods of the two clamping air cylinders B (30).
3. The automatic precise detection device for the cross-section cracks of the power cable according to claim 2, wherein: the bearing seat is fixedly arranged on the bottom surface of the arch frame (23), the hollow tube (24) is rotatably arranged in the bearing seat, and the hollow tube (24) penetrates through the arch frame (23).
4. A power cable section crack precision automatic detection device according to claim 3, characterized in that: the driving unit comprises a servo motor (32) fixedly arranged on the arch frame (23), and a driving gear (33) arranged on an output shaft of the servo motor (32), wherein the driving gear (33) is meshed with the driven gear (25).
5. The precise automatic detection device for the cross-section cracks of the power cable according to claim 4, wherein: a connecting plate is fixedly arranged at the acting end of a piston rod of the feeding cylinder (28), and the Mark pen (29) is fixedly arranged on the connecting plate.
6. The precise automatic detection device for the cross-section cracks of the power cable according to claim 5, wherein: the top of the bracket (5) is provided with a through groove.
7. The precise automatic detection device for the cross-section cracks of the power cable according to claim 6, wherein: the two clamping cylinders A (19) are arranged in bilateral symmetry, and the two clamping cylinders B (30) are arranged in bilateral symmetry.
8. The precise automatic detection device for the cross-section cracks of the power cable according to claim 7, wherein: the structure of the chuck A (20) is the same as that of the chuck B (31), and arc grooves (34) are formed in the inner end faces of the chuck A (20) and the chuck B (31).
9. The precise automatic detection device for the cross-section cracks of the power cable according to claim 8, wherein: the detection device further comprises a controller, wherein the controller is electrically connected with the driving motor (11), the CCD lens (27), the electromagnetic valve of the feeding cylinder (28), the electromagnetic valve of the clamping cylinder A (19) and the electromagnetic valve of the clamping cylinder B (30) through signal wires.
10. The application method of the electric cable section crack precise automatic detection device is characterized in that the electric cable section crack precise automatic detection device is adopted, and is characterized in that: it comprises the following steps:
s1, the head end of a power cable (1) on a winding drum (6) is pulled downwards by a worker, then the head end of the power cable (1) sequentially passes through a through groove of a bracket (5), an area surrounded by a driving wheel (9) and a guide wheel (10), a through hole A (7), an area surrounded by two chucks A (20) and a cavity of a hollow tube (24), after the head end of the power cable (1) passes through the hollow tube (24), the area surrounded by two chucks B (31) where the head end of the power cable (1) is positioned is ensured, and at the moment, the lower end of the power cable (1) is just positioned between a CCD lens (27) and a Mark pen (29);
s2, detecting cracks (2) on the peripheral surface of the lower end part of the electric cable (1), wherein the specific operation steps are as follows:
s21, clamping the head end part of the electric cable (1): the worker controls the piston rods of the two clamping cylinders B (30) to extend, the piston rods drive the clamping heads B (31) to move towards the head end part of the power cable (1), and when the piston rods of the clamping cylinders B (30) extend completely, the head end part of the power cable (1) is just clamped between the two clamping heads B (31);
s22, clamping the upper end part of the power cable (1): the worker controls the piston rods of the two clamping cylinders A (19) to extend, the piston rods drive the clamping heads A (20) to move towards the upper end part of the power cable (1), and when the piston rods of the clamping cylinders A (19) extend completely, the upper end part of the power cable (1) is just clamped between the two clamping heads A (20);
s23, straightening the power cable (1): the worker controls the piston rods of the two vertical cylinders (21) to retract upwards, the piston rods drive the pressure heads (22) to move upwards, in the separation process of the pressure heads (22) and the square frames (15), the square frames (15) move upwards along the guide posts (17) under the action of the restoring force of the springs (18), the square frames (15) drive the two clamping cylinders A (19) and the two clamping heads A (20) to move upwards synchronously, and the two clamping heads A (20) drive the clamped power cable (1) to move upwards, so that the power cable (1) is straightened;
s24, controlling a servo motor (32) to rotate positively, driving a driving gear (33) to rotate by the servo motor (32), driving a driven gear (25) to rotate by the driving gear (33), enabling a driven gear (25) to rotate around the axis of a hollow pipe (24), enabling two vertical plates (26) to rotate around a power cable (1) simultaneously by the driven gear (25), enabling a CCD lens (27) and a Mark pen (29) to synchronously rotate, enabling a pen point of the Mark (29) to contact with the surface of the power cable (1) when the CCD lens (27) rotates around the lower end of the power cable (1), enabling the CCD lens (27) to photograph the peripheral surface of the lower end of the power cable (1) in real time, enabling the CCD lens (27) to send an electric signal to a controller if the CCD lens (27) detects a crack (2) on the peripheral surface of the lower end of the power cable (1), enabling a piston rod of a feeding cylinder (28) to extend out, enabling the piston rod of the Mark pen (29) to drive the Mark pen to move towards the power cable (1) so that a pen point of the Mark (29) contacts with the surface of the power cable (1), enabling the servo motor (27) to reverse the servo motor (27) to drive the lower end of the driven gear (25) to reset, and the Mark pen (29) to reset in the process of the power cable (1), thereby marking the position with the crack (2), after marking, controlling the piston rod of the feeding cylinder (28) to retract, and separating the Mark pen (29) from the power cable (1);
if the CCD lens (27) rotates for one circle, the crack (2) is not detected, the controller controls the servo motor (32) to rotate reversely, the servo motor (32) drives the driven gear (25) to rotate reversely, and the driven gear (25) drives the CCD lens (27) and the Mark pen (29) to reset, so that the crack (2) on the peripheral surface of the lower end part of the power cable (1) is finally detected;
s3, after detection, controlling piston rods of the two clamping cylinders A (19) to retract, separating the two chucks A (20) from the power cable (1), subsequently controlling piston rods of the two clamping cylinders B (30) to retract, separating the two chucks B (31) from the power cable (1), after separation, controlling piston rods of the two vertical cylinders (21) to extend downwards, driving the pressure heads (22) to move downwards by the piston rods, downwards pressing the square blocks (15) by the pressure heads (22), and downwards compressing the springs (18) by the square blocks (15) along the guide posts (17);
s4, a worker controls a driving motor (11) to start, the driving motor (11) drives a driving wheel (9) to rotate, under the driving of the driving wheel (9) and a guide wheel (10), the power cable (1) on the winding drum (6) is downwards unreeled out, after a certain unreeled distance, the controller controls the driving motor (11) to be closed, at the moment, a detected power cable (1) section falls below the workbench (3) through a through hole B (12), meanwhile, an undetected power cable (1) section enters a detection area of the CCD lens (27), and the operation of the step S2 is repeated, so that the second section of the power cable (1) can be continuously detected;
s5, repeating the operation of the step S4, detecting the cracks (2) on the section of the whole power cable (1) continuously, and repairing the cracks (2) on the transverse line drawn on the power cable (1) by workers.
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| CN202310986104.3A CN117054336B (en) | 2023-08-07 | 2023-08-07 | Automatic detection device for power cable section cracks and application method thereof |
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| CN202310986104.3A CN117054336B (en) | 2023-08-07 | 2023-08-07 | Automatic detection device for power cable section cracks and application method thereof |
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| US20200172381A1 (en) * | 2018-11-30 | 2020-06-04 | Tyco Electronics (Shanghai) Co. Ltd. | Cable Detection Apparatus |
| CN113588684A (en) * | 2021-08-18 | 2021-11-02 | 中国人民解放军火箭军工程大学 | Cable detection system and detection method |
| CN114047196A (en) * | 2021-10-25 | 2022-02-15 | 上海仪电智能科技有限公司 | High-precision detection equipment for surface flaws of cable and using method thereof |
| CN115656194A (en) * | 2022-10-24 | 2023-01-31 | 罗富亮 | Cable connection detection device for cable installation and process thereof |
| CN116148275A (en) * | 2023-01-02 | 2023-05-23 | 哈尔滨理工大学 | Defect on-line detection device for power cable |
| CN219328747U (en) * | 2023-03-14 | 2023-07-11 | 嘉兴市南湖高分子材料股份有限公司 | Cable surface cracking detection mechanism |
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2023
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200172381A1 (en) * | 2018-11-30 | 2020-06-04 | Tyco Electronics (Shanghai) Co. Ltd. | Cable Detection Apparatus |
| CN113588684A (en) * | 2021-08-18 | 2021-11-02 | 中国人民解放军火箭军工程大学 | Cable detection system and detection method |
| CN114047196A (en) * | 2021-10-25 | 2022-02-15 | 上海仪电智能科技有限公司 | High-precision detection equipment for surface flaws of cable and using method thereof |
| CN115656194A (en) * | 2022-10-24 | 2023-01-31 | 罗富亮 | Cable connection detection device for cable installation and process thereof |
| CN116148275A (en) * | 2023-01-02 | 2023-05-23 | 哈尔滨理工大学 | Defect on-line detection device for power cable |
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