A self-propelled foreign body cleaning device for overhead cables

Abstract

The present invention discloses a self-propelled foreign matter cleaning device for overhead cables, which relates to the technical field of cleaning overhead cables. The device comprises a patrol device, the patrol device is equipped with a first electric slide rail electrically connected to a control terminal, the first electric slide rail is slidably connected to a support through a slider, the support is equipped with a first electric shaft, the first electric shaft is slidably connected to a transmission cylinder, the transmission cylinder is fixedly connected to an arc-shaped electric slide rail, the arc-shaped electric slide rail is slidably connected to a mounting frame, the mounting frame is fixedly connected to a first push rod, the telescopic end of the first push rod is hinged to a connecting frame, and a heating wire is installed on the upper side of the connecting frame. The present invention melts foreign matter wound around the overhead cable through the heating wire, cleans foreign matter on the surface of the overhead cable while reducing the heating area of ​​the insulating layer of the overhead cable, and reduces the damage to the insulating layer of the overhead cable caused by external heat when cleaning foreign matter.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning overhead cables, and in particular to a self-propelled foreign matter cleaning device for overhead cables. Background Art

[0002] Overhead cables are a type of single-core cable produced to reduce short-circuit faults. Overhead cables are usually equipped with an insulation layer and a protective sheath. During the operation of overhead cables, kites or balloons often float above the overhead cables, causing the kite lines or balloon lines to be entangled in the overhead cables. The kite lines or balloon lines entangled in the overhead cables rub against the overhead cables under the wind, causing damage to the insulation layer of the overhead cables or even causing the insulation layer to break. Long-term friction can also cause the overhead cables to overheat, accelerate the aging of the overhead cables, and affect the stability of the power system. Therefore, workers are required to regularly clean the kite lines or balloon lines on the overhead cables. Currently, drones are usually used to clean the kite lines or balloon lines on the overhead cables. The kite line or balloon line wrapped around the overhead cable is processed by a flamethrower. During the processing, a drone carrying a flamethrower rises to the place where the kite line or balloon line is wrapped around the overhead cable to burn it. However, this method can easily cause the burning kite line or balloon line to fall to the ground and cause a fire. During the burning process, the flame sprayed by the flamethrower will contact the insulation layer of the overhead cable. The flame will soften and deform the insulation layer, thereby reducing the protective effect of the insulation layer on the overhead cable. Even when the flame treatment is carried out for a long time, the insulation layer of the overhead cable will burn, causing immeasurable losses. At the same time, this method cannot control the range of contact between the flame and the insulation layer of the overhead cable. Summary of the invention

[0003] The invention provides a self-propelled foreign matter cleaning device for an overhead cable, so as to overcome the disadvantage that the existing method for processing foreign matter on the surface of the overhead cable seriously damages the insulating layer on the surface of the overhead cable.

[0004] Technical solution: A self-propelled foreign body cleaning device for overhead cables, comprising an inspection device, the inspection device is installed with and electrically connected to a control terminal, the inspection device is installed with a first electric slide rail electrically connected to the control terminal, the first electric slide rail is slidably connected to a support via a slider, a first electric shaft electrically connected to the control terminal is installed on a side of the support away from the first electric slide rail, the first electric shaft is slidably connected to a transmission cylinder, the transmission cylinder is fixedly connected to an arc-shaped electric slide rail electrically connected to the control terminal via a bracket, the arc-shaped electric slide rail is slidably connected to a mounting frame via a slider, the mounting frame is fixedly connected to a first push rod electrically connected to the control terminal, the telescopic end of the first push rod is hinged to a connecting frame, and a heating wire electrically connected to the control terminal is installed on the upper side of the connecting frame.

[0005] Furthermore, the connecting frame is slidably connected with legs distributed in a mirror image, a tension spring is fixedly connected between the legs and the connecting frame, and there is friction between the telescopic end of the first push rod and the hinge of the connecting frame.

[0006] Furthermore, the mounting frame is limitedly slidably connected with a slider distributed in a mirror image, and a second electric shaft electrically connected to the control terminal is installed on the side of the slider away from the mounting frame, a tension spring is fixedly connected between the slider adjacent to the second electric shaft and the mounting frame, a friction table is fixedly connected to the side of the second electric shaft away from the mounting frame, the support is fixedly connected with a first limiting column in contact with the transmission cylinder, a first guide groove distributed in a mirror image is arranged in the transmission cylinder, the first guide grooves distributed in a mirror image are connected to each other, and a hemisphere sliding along the first guide groove distributed in a mirror image is arranged on the first electric shaft.

[0007] Furthermore, a support frame is fixedly connected to the side of the inspection device close to the first electric slide rail, and the support frame is fixedly connected to a second push rod electrically connected to the control terminal. The telescopic end of the second push rod is fixedly connected to a mirror-distributed limit frame through a bracket, and an elastic sheet is fixedly connected to the side of the limit frame away from the second push rod.

[0008] Furthermore, a third electric shaft and a second limiting column are installed on a side of the support frame close to the second push rod, the third electric shaft is electrically connected to the control terminal, the third electric shaft is slidably connected to a transmission member in contact with the second limiting column, a second guide groove with a mirror distribution is arranged in the transmission member, the second guide grooves with a mirror distribution are connected to each other, a hemisphere sliding along the second guide groove with a mirror distribution is arranged on the third electric shaft, a spring is arranged between the third electric shaft and the transmission member, the transmission member is fixedly connected to a connecting column through a bracket, an extrusion elastic member is fixedly connected to a side of the connecting column close to the inspection device, the extrusion elastic member is provided with a one-way elastic wheel with a mirror distribution, the connecting column is sealingly and slidably connected to a piston rod, the piston rod passes through the extrusion elastic member and cooperates with the connecting column to form a reset chamber, gas is stored in the reset chamber, a clamping elastic member is fixedly connected to a side of the piston rod away from the connecting column, the clamping elastic member is provided with a one-way clamping wheel with a mirror distribution, and the second push rod is fixedly connected to an unlocking block extruded and matched with the one-way clamping wheel with a mirror distribution through a bracket.

[0009] Furthermore, a 180° protrusion is provided on the side of the transmission cylinder away from the arc-shaped electric slide rail, and the transmission cylinder is limitedly cooperated with the first limit column through the protrusion thereon. A 180° groove is provided on the side of the transmission member away from the extrusion elastic member, and the transmission member is limitedly cooperated with the second limit column through the groove thereon, so as to limit the angle at which the transmission cylinder and the transmission member can rotate.

[0010] Furthermore, the elastic force of the spring between the third electric rotating shaft and the transmission member is greater than the gravity of the transmission member and all parts thereon, and is used to limit the movement sequence of the transmission member.

[0011] Furthermore, the pressure of the gas in the resetting chamber is greater than the force of deformation of the clamping elastic member, which is used to control the timing of the one-way clamping wheels distributed in mirror image approaching each other.

[0012] Furthermore, it also includes a third push rod electrically connected to the control terminal, the third push rod is installed in the inspection device, the telescopic end of the third push rod is fixedly connected to a second electric slide rail slidably connected to the inspection device, the second electric slide rail is electrically connected to the control terminal, the second electric slide rail is slidably connected to a support moment block through a slider, the support moment block is fixedly connected to a guide frame on a side away from the inspection device, the guide frame is rotatably connected to a rotating drum, the guide frame is equipped with a fourth electric rotating shaft electrically connected to the control terminal, the fourth electric rotating shaft is fixedly connected to an electric heating rod electrically connected to the control terminal through a bracket, and the guide frame limit A mirror-distributed shift piece is slidably connected to the position, a spring is fixedly connected between the shift piece and the rotating drum, the shift piece is limitedly matched with the rotating drum, a pull rope is fixedly connected to the shift piece, a connecting disk is slidably connected to the rotating drum, the pull rope passes through the rotating drum and is fixedly connected to the connecting disk, a fourth push rod electrically connected to the control terminal is fixedly connected to the side of the guide frame away from the mirror-distributed shift piece, the telescopic end of the fourth push rod passes through the rotating drum and is limitedly rotatably connected to the connecting disk, the guide frame is fixedly connected to a motor through a bracket, the motor is electrically connected to the control terminal, and the output shaft of the motor is transmitted to the rotating drum through a gear set.

[0013] Furthermore, a connecting plate is sealingly and slidingly connected inside the shifter, an extrusion column is fixedly connected to the side of the connecting plate close to the rotating cylinder, the extrusion column is slidingly connected to the adjacent shifter, and an equidistant spike is fixedly connected to the side of the connecting plate close to the adjacent extrusion column. The connecting plate cooperates with the adjacent shifter to form a return cavity, and gas is stored in the return cavity.

[0014] The present invention at least includes the following beneficial effects: the present invention inspects the overhead cables by moving the inspection device, and when it is observed that the kite line or balloon line is wound on the surface of the overhead cable, the inspection device is stopped and the electric heating wire is controlled to move toward the direction close to the overhead cable, so that the electric heating wire approaches the overhead cable and melts the kite line or balloon line wound on the overhead cable, and the kite line or balloon line wound on the surface of the overhead cable is melted while reducing the heating area of ​​the insulating layer of the overhead cable, thereby reducing the damage to the insulating layer of the overhead cable caused by external heat when cleaning the kite line or balloon line; the kite lines or balloon lines wound on the surface of the overhead cable are gathered and melted uniformly, thereby reducing the number of times the electric heating wire approaches the insulating layer of the overhead cable, thereby further reducing the damage to the insulating layer of the overhead cable; the kite lines or balloon lines laid on the overhead cable are gathered and cut uniformly, thereby preventing direct cutting from causing long sections of kite lines or balloon lines to be laid on other overhead cables again during the falling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the limit frame, the extruded elastic member and the supporting moment block of the present invention;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the first electric rotating shaft, the transmission cylinder and the arc-shaped electric slide rail of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting frame, the heating wire and the supporting legs of the present invention;

[0019] Figure 5 An exploded view of the support, the first electric shaft and the mounting frame of the present invention;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the support frame, the second push rod and the limit frame of the present invention;

[0021] Figure 7 An exploded view of the third electric shaft, the second limiting column and the transmission member of the present invention;

[0022] Figure 8 It is a three-dimensional structural schematic diagram of the connecting column, the extruded elastic member and the piston rod of the present invention;

[0023] Fig. 9 It is a schematic diagram of the three-dimensional structure of the inspection device, the third push rod and the second electric slide rail of the present invention;

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure of the supporting moment block, the guide frame and the rotating drum of the present invention;

[0025] Fig.11It is a schematic diagram of the three-dimensional structure of the supporting moment block, the guide frame and the fourth push rod of the present invention;

[0026] Fig.12 It is a three-dimensional structural schematic diagram of the puller, the pull rope and the connecting disk of the present invention;

[0027] Fig.13 It is a schematic diagram of the three-dimensional structure of the connecting disk, the fourth push rod and the motor of the present invention;

[0028] Fig.14 It is a schematic diagram of the three-dimensional structure of the connecting plate, the extruded column and the spikes of the present invention.

[0029] Label names in the figure: 1-inspection device, 2-first electric slide rail, 3-support, 4-first electric shaft, 5-transmission cylinder, 501-first guide groove, 6-arc electric slide rail, 7-mounting frame, 8-first push rod, 9-connecting frame, 10-heating wire, 11-support leg, 12-second electric shaft, 13-friction round table, 14-first limiting column, 15-support frame, 16-second push rod, 17-limiting frame, 18-elastic sheet, 19-third electric shaft, 20-second limiting column, 21-transmission member, 211-second guide groove , 22-connecting column, 23-extrusion elastic member, 24-one-way elastic wheel, 25-piston rod, 251-reset chamber, 26-clamping elastic member, 27-one-way clamping wheel, 28-unlocking block, 29-third push rod, 30-second electric slide rail, 31-support moment block, 32-guide frame, 33-rotating drum, 34-fourth electric rotating shaft, 35-electric heating rod, 36-dial, 37-pull rope, 38-connecting disk, 39-fourth push rod, 40-motor, 41-connecting plate, 411-return chamber, 42-extrusion column, 43-spike. DETAILED DESCRIPTION

[0030] The following will be combined with the attached Figures 1 to 13 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: A self-propelled foreign body cleaning device for overhead cables, please refer to Figure 1-Figure 4, including a patrol device 1, the patrol device 1 is an existing device, which walks on two adjacent overhead cables through four guide wheels, a control terminal is installed and electrically connected to the upper side of the rear of the patrol device 1, and a camera is installed and electrically connected to the upper side of the front of the patrol device 1. The camera on the patrol device 1 is connected to the operator's handheld control terminal signal, and a first electric slide rail 2 in the front and rear directions is installed in the middle of the upper side of the patrol device 1. The first electric slide rail 2 is electrically connected to the control terminal. The first electric slide rail 2 is slidably connected to a support 3 through a slider. Initially, the slider of the first electric slide rail 2 is located at the rear side thereof, and a first electric shaft 4 is installed on the upper side of the support 3. The first electric shaft 4 is electrically connected to the control terminal, and the first electric shaft 4 is slidably connected to a transmission cylinder 5. An arc-shaped electric slide rail 6 is fixedly connected to the upper part of the front side of the transmission cylinder 5 through a bracket. The arc-shaped electric slide rail 6 is electrically connected to the control terminal. The arc-shaped electric slide rail 6 is slidably connected to the mounting frame 7 through a slider. Initially, the slider of the arc-shaped electric slide rail 6 is located at its lower side. At this time, the upper side of the mounting frame 7 is in a horizontal state. A first push rod 8 is fixedly connected to the middle part of the mounting frame 7. The first push rod 8 is electrically connected to the control terminal. A connecting frame 9 is hinged at the telescopic end of the first push rod 8, and there is friction at the hinge between the telescopic end of the first push rod 8 and the connecting frame 9, which is used to prevent the connecting frame 9 from swinging randomly during movement, which is not conducive to the subsequent adjustment of the distance between the connecting frame 9 and the overhead cable. A heating wire 10 is installed in the middle of the upper side of the connecting frame 9, and the heating wire 10 is electrically connected to the control terminal.

[0032] Please refer to Figure 3 and Figure 4 The front and rear sides of the connecting frame 9 are slidably connected with supporting legs 11, and a tension spring is fixedly connected between the upper side of the lower part of the supporting leg 11 and the connecting frame 9, and the elastic coefficients of the adjacent tension springs of the two supporting legs 11 are the same, so that when the connecting frame 9 moves in the direction close to the overhead cable, the distance between the front and rear ends of the connecting frame 9 and the overhead cable is kept equal.

[0033] Please refer to Figure 2 , Figure 3 and Figure 5The upper limit sliding connection of the mounting frame 7 is provided with two sliders which are mirror-imaged in the front and rear directions. The upper sides of the two sliders are provided with second electric shafts 12. The two second electric shafts 12 are electrically connected to the control terminal. The opposite sides of the adjacent sliders of the two second electric shafts 12 are fixedly connected with tension springs between the mounting frame 7, which are used to keep the friction table 13 in contact with the side of the overhead cable. The upper side of the second electric shaft 12 is fixedly connected with a friction table 13, and the diameter of the friction table 13 gradually decreases from bottom to top, which is used to facilitate the contact between the two friction tables 13 and the side of the overhead cable. The support 3 is fixedly connected with a first limit column 14, which contacts and limits the rear side of the transmission cylinder 5. In coordination, a 180° protrusion is provided on the front side of the transmission cylinder 5. Initially, the first limiting column 14 does not contact the protrusion on the side of the transmission cylinder 5. As the transmission cylinder 5 rotates, the protrusion on the transmission cylinder 5 gradually contacts the side of the first limiting column 14. At this time, the first limiting column 14 limits the transmission cylinder 5, so that the transmission cylinder 5 cannot continue to rotate, and the maximum angle of clockwise and counterclockwise rotation of the transmission cylinder 5 is limited to 90°. Two first guide grooves 501 with left and right mirror distribution are provided in the transmission cylinder 5, and the upper and lower sides of the two first guide grooves 501 are connected to each other. A hemisphere is provided on the upper part of the front side of the first electric rotating shaft 4, and the hemisphere of the first electric rotating shaft 4 slides along the first guide groove 501 with mirror distribution.

[0034] Please refer to Figure 1 , Figure 2 and Figure 6 A support frame 15 is fixedly connected to the upper side of the front of the inspection device 1, and a second push rod 16 is fixedly connected to the upper side of the rear of the support frame 15. The second push rod 16 is electrically connected to the control terminal. The telescopic end of the second push rod 16 is fixedly connected to two limit frames 17 distributed in left and right mirror images through a bracket. An elastic sheet 18 is fixedly connected to the side of the limit frame 17 away from the second push rod 16. The elastic sheet 18 is made of elastic material and deforms when it comes into contact with the overhead cable to increase the contact area with the overhead cable.

[0035] Please refer to Figure 6-Figure 8A third electric shaft 19 electrically connected to the control terminal is installed in the middle of the upper side of the support frame 15, a second limiting column 20 is fixedly connected to the front of the upper side of the support frame 15, and a transmission member 21 is slidably connected to the third electric shaft 19. The front side of the transmission member 21 contacts and limits the second limiting column 20. A 180° groove is provided on the front side of the transmission member 21. The side of the second limiting column 20 contacts the edge of the groove of the transmission member 21 to stop the rotation of the transmission member 21, and the maximum angle of clockwise and counterclockwise rotation of the transmission member 21 is limited to 90°. Two second guide grooves 211 with left and right mirror distribution are provided in the transmission member 21, and the upper and lower sides of the mirror distribution second guide grooves 211 are connected to each other. A hemisphere is provided on the upper part of the front side of the third electric shaft 19. The hemisphere of the electric rotating shaft 19 slides along the second guide groove 211 distributed in a mirror image. A spring is arranged between the upper side of the third electric rotating shaft 19 and the transmission member 21. Initially, under the action of the adjacent spring of the transmission member 21, the hemisphere of the third electric rotating shaft 19 is located at the lower side of the second guide groove 211 distributed in a mirror image. The elastic force of the spring between the third electric rotating shaft 19 and the transmission member 21 is greater than the gravity of the transmission member 21 and all parts thereon, which is used to limit the movement sequence of the transmission member 21. The upper part of the rear side of the transmission member 21 is fixedly connected with a connecting column 22 through a bracket, and the lower side of the connecting column 22 is fixedly connected with an extrusion elastic member 23. The lower part of the extrusion elastic member 23 is provided with two unidirectional elastic wheels 24 distributed in a front and rear mirror image. The extrusion elastic member 23 is used to keep the two unidirectional elastic wheels 24 always in contact with each other. The side of the overhead cable is contacted, and the two one-way elastic wheels 24 roll downward along the side of the overhead cable to push the kite line or balloon line wound on the overhead cable downward, so that the distance between the coil formed by the kite line or balloon line and the lower side of the overhead cable is increased, which is convenient for the electric heating wire 10 to fuse the kite line or balloon line wound on the overhead cable. Then the two one-way elastic wheels 24 slide upward along the overhead cable to pull the fused kite line or balloon line upward to disconnect the lower side of the kite line or balloon line wound on the overhead cable. The middle part of the lower side of the connecting column 22 is sealed and slidably connected with a piston rod 25. The upper side of the piston rod 25 passes through the extrusion elastic member 23 and cooperates with the connecting column 22 to form a reset chamber 251. Gas is stored in the reset chamber 251. A clamping elastic member 26 is fixedly connected to the lower side of the plug rod 25. The pressure of the gas in the reset chamber 251 is greater than the deformation force of the clamping elastic member 26, which is used to control the timing of the two one-way clamping wheels 27 approaching each other. After the two one-way elastic wheels 24 pull the coil composed of the kite line or the balloon line toward the upper part of the overhead cable, the kite line or the balloon line on the upper part of the overhead cable becomes loose, and the two one-way clamping wheels 27 approach each other and clamp the kite line or the balloon line between them, so that the two one-way clamping wheels 27 can clamp and fix the kite line or the balloon line. The lower part of the clamping elastic member 26 is provided with two one-way clamping wheels 27 distributed in front and back mirror images. Initially, the two one-way clamping wheels 27 are in contact with each other. When the two one-way clamping wheels 27 are in contact with the overhead cable,The two one-way clamping wheels 27 roll along the left and right sides of the overhead cable respectively. When the piston rod 25 moves upward, the two one-way clamping wheels 27 slide along the overhead cable and contact each other to clamp the kite line or balloon line between the overhead cable. The second push rod 16 is fixed with an unlocking block 28 through a bracket. The unlocking block 28 is squeezed and matched with the mirror-distributed one-way clamping wheels 27. When the two one-way clamping wheels 27 clamp the fused kite line or balloon line and reset it, the two one-way clamping wheels 27 are spread apart by moving the unlocking block 28 upward, so that the distance between the two one-way clamping wheels 27 is increased, and the kite line or balloon line clamped therein falls off.

[0036] During the operation of overhead cables (hereinafter referred to as cables), kite lines, balloon lines, etc. are often entangled on the surface of the cables. When kite lines or balloon lines are entangled on the cables, as time goes by, the number of turns of the two on the cable surface increases, which wears the insulation layer on the surface of the cable and increases the risk of short circuit in the cable. Therefore, it is necessary to clean it. The specific process is as follows: When using this device, the operator installs the device between two adjacent cables through the lifting device, moves forward from the two cables through the four guide wheels of the inspection device 1, and the operator inspects the cables through the camera on the inspection device 1. The operator connects the camera signal on the inspection device 1 through the handheld control terminal, and the operator inspects the cables in real time through the handheld control terminal. The personnel discovered through the camera of the inspection device 1 that one of the cables (the cable on the left is taken as an example in this article) was wrapped with a kite line or a balloon line (the kite line and balloon line wrapped around the cable will be referred to as a coil hereinafter). As the inspection device 1 moves, until the limit frame 17 moves to the front side of all the coils, the inspection device 1 is stopped. At this time, the control terminal starts the third electric shaft 19 and the second push rod 16 in sequence, and the third electric shaft 19 rotates counterclockwise (the rotation perspective in this article is from top to bottom). The third electric shaft 19 drives the transmission member 21 to rotate 90° through the hemisphere, and the transmission member 21 drives all parts thereon to move to the top of the left cable through the bracket. At this time, the edge of the groove of the transmission member 21 contacts the side of the second limit column 20 and stops rotating, and the control terminal stops the third electric shaft 19.

[0037] After the third electric shaft 19 stops, the telescopic end of the second push rod 16 extends out and drives the two limit frames 17 to move upward through the bracket. The limit frames 17 drive the adjacent elastic sheets 18 to move upward, and the elastic sheets 18 gradually come into contact with the cable. As the elastic sheets 18 move upward, the elastic sheets 18 gradually deform and increase the contact area with the cable, thereby limiting the coils wrapped around the cable to prevent the frontmost coils from sliding on the cable surface when the coils are gathered later, making it difficult to gather the coils.

[0038] After the elastic sheet 18 contacts the cable and deforms, the control terminal stops the second push rod 16 and starts the first electric shaft 4. When the first electric shaft 4 drives the transmission cylinder 5 to rotate 90° clockwise through the hemisphere, the protrusion on the transmission cylinder 5 contacts the side of the first limit column 14 and stops rotating. At this time, the two friction cones 13 move to the left and right sides under the left cable. As the first electric shaft 4 continues to rotate, the hemisphere on the first electric shaft 4 slides along the first guide groove 501 in the direction of rotation and pushes the transmission cylinder 5 upward through the first guide groove 501. In this process, the transmission cylinder 5 drives the mounting frame through the bracket and the arc-shaped electric slide rail 6. 7 and all parts thereon move upward, and the two friction tables 13 gradually contact the left and right sides of the left cable. As the mounting frame 7 moves upward, the left cable squeezes the two friction tables 13 to the left and right sides respectively, and the friction table 13 drives the adjacent second electric shaft 12 and its adjacent slider to move, stretching the tension spring adjacent to the adjacent slider of the second electric shaft 12, until the first electric shaft 4 rotates a total of 270°, that is, when the hemisphere on the first electric shaft 4 moves to the lowermost side of the adjacent first guide groove 501, the control terminal stops the first electric shaft 4 and starts the two second electric shafts 12, the arc-shaped electric slide rail 6 and the first electric slide rail 2 in sequence.

[0039] As the control terminal starts the two second electric shafts 12, the second electric shaft 12 on the right side of the cable rotates counterclockwise, and the second electric shaft 12 on the left side rotates clockwise, and the second electric shaft 12 drives the adjacent friction table 13 to rotate. At the same time, the arc-shaped electric slide rail 6 drives the mounting frame 7 to swing back and forth through the slider, so that the two friction tables 13 rotate while swinging back and forth in the circumferential direction, pushing the coil wound on the cable forward, and the first electric slide rail 2 drives the support 3, the first electric shaft 4 and the transmission cylinder 5 to move forward through the slider, and the transmission cylinder 5 drives the arc-shaped electric slide rail 6 and all parts thereon to move through the bracket. As the two friction tables 13 rotate, the coil wound on the cable is pushed forward, so that the coil wound on the cable moves forward and gradually piles up.

[0040] When the slider of the first electric slide rail 2 drives all the parts thereon to move to the front side of the first electric slide rail 2, the control terminal stops the first electric slide rail 2 and stops the two second electric shafts 12 at the same time. When the mounting frame 7 moves to the lower side of the arc-shaped electric slide rail 6, the arc-shaped electric slide rail 6 is stopped. At this time, the coil wound on the left cable is gathered between the two friction tables 13 and the adjacent elastic sheet 18. At this time, the control terminal controls the first electric shaft 4 to rotate clockwise, and the hemisphere on the first electric shaft 4 moves along the first guide groove 501 in the rotation direction, so that the transmission cylinder 5 moves down and resets. At this time, the two friction tables 13 gradually lose contact with the left cable. The two second electric shafts 12 drive the adjacent friction tables 13 to move along the mounting frame 7 under the action of the adjacent tension springs and reset relative to the mounting frame 7. When the hemisphere on the first electric shaft 4 moves to the uppermost side of the adjacent first guide groove 501, the control terminal stops the first electric shaft 4 and starts the third electric shaft 19.

[0041] The third electric rotating shaft 19 rotates 180° counterclockwise. During this process, the hemisphere on the third electric rotating shaft 19 moves along the second guide groove 211 in the rotation direction. At this time, the edge of the groove of the transmission member 21 contacts the side of the second limit column 20 and stops rotating, so that the transmission member 21 moves down and compresses the adjacent spring. The transmission member 21 drives the connecting column 22, the extruding elastic member 23, the one-way elastic wheel 24 and the piston rod 25 to move downward through the bracket. When the connecting column 22 moves downward, the connecting column 22 pushes the piston rod 25 through the gas in the reset chamber 251. 5 moves downward and contacts with the cable first, the piston rod 25 drives the two one-way clamping wheels 27 to move through the clamping elastic member 26 and gradually contacts with the coil on the left side of the cable surface, the clamping elastic member 26 is deformed, and at the same time, the two one-way clamping wheels 27 move along the left and right sides of the cable respectively, squeezing the coil on the cable surface from the upper quarter point to the left and right sides, so that the upper side of the coil is close to the upper quarter point of the cable, until the clamping elastic member 26 can no longer be deformed, at which time the piston rod 25 stops moving, and as the connecting column 22 moves downward, the gas in the reset chamber 251 is compressed.

[0042] As the connecting column 22 moves downward, the connecting column 22 pushes the two one-way elastic wheels 24 to gradually contact the cable and roll downward along the side of the cable by squeezing the elastic member 23, and at the same time, the squeezing elastic member 23 is deformed and keeps the two one-way elastic wheels 24 in contact with the surface of the cable. Since the insulating layer on the surface of the cable is made of a smooth material, during the rolling process of the two one-way elastic wheels 24, the one-way elastic wheels 24 squeeze the left and right sides of the coil and move downward. At the same time, since the circumference of the coil after contraction is greater than the circumference of the outer side of the cable, as the one-way elastic wheel 24 rolls downward, the coil in the upper half of the cable is tightened, and at the same time, a part of the coil in the lower half of the cable loses contact with the lower side of the cable, until the two one-way elastic wheels 24 move to the lower side of the quarter points on the left and right sides of the cable respectively, and the transmission member 21 stops moving downward.

[0043] After the third electric shaft 19 rotates 180° counterclockwise, the control terminal stops the third electric shaft 19 and starts the first push rod 8. The telescopic end of the first push rod 8 drives the connecting frame 9, the heating wire 10 and the two legs 11 to move upward. The two legs 11 contact the cable surface in turn. As the telescopic end of the first push rod 8 extends, the connecting frame 9 swings under the action of the adjacent legs 11. Until the two legs 11 are in contact with the cable, the connecting frame 9 stops swinging, and the connecting frame 9 drives the heating wire 10 to gradually move upward, stretching the tension spring between the connecting frame 9 and the two legs 11. Under the action of the adjacent tension springs of the two legs 11, the distance between the two ends of the connecting frame 9 and the cable is kept consistent during the upward movement, preventing one side of the heating wire 10 from deviating and directly contacting the insulating layer of the cable. The insulation layer of the cable is damaged. As the connecting frame 9 drives the heating wire 10 to move upward, the distance between the heating wire 10 and the cable gradually decreases. At the same time, the heating wire 10 gradually contacts the coil and melts the lower side of the coil. During this process, the control terminal observes the distance between the heating wire 10 and the insulation layer of the cable through the camera in real time. Until the distance between the heating wire 10 and the cable is equal to the diameter of a wire end, the control terminal controls the telescopic end of the first push rod 8 to retract, and the telescopic end of the first push rod 8 drives the connecting frame 9 to move downward, and the connecting frame 9 drives the heating wire 10 to gradually move away from the cable. At the same time, the tension spring between the connecting frame 9 and the support leg 11 is gradually reset, and then the connecting frame 9 drives the two support legs 11 to move downward and gradually reset. At this time, the control terminal stops the first push rod 8 and controls the telescopic end of the second push rod 16 to retract.

[0044] When the telescopic end of the second push rod 16 contracts, the telescopic end of the second push rod 16 drives the two limit frames 17 and the unlocking block 28 to move downward through the bracket, so that the limit frame 17 drives the adjacent elastic sheet 18 to gradually lose contact with the adjacent cable and reset.

[0045] When the control terminal controls the telescopic end of the first push rod 8 to retract, the third electric shaft 19 is controlled to rotate counterclockwise, and the hemisphere on the third electric shaft 19 moves along the second guide groove 211 in the rotation direction, so that the transmission member 21 moves up under the action of the adjacent spring, until the hemisphere on the third electric shaft 19 moves to the lower side of the adjacent second guide groove 211, the control terminal controls the third electric shaft 19 to rotate clockwise, at this time, the third electric shaft 19 drives the transmission member 21 to rotate 90° clockwise through the hemisphere and then resets, at this time, the control terminal stops the third electric shaft 19, and in the process of the transmission member 21 moving up, the transmission member 21 drives the connecting column 22 and the extrusion elastic member 23 to move up through the bracket, and the extrusion elastic member 23 is pressed. The compression elastic member 23 drives the two one-way elastic wheels 24 to move upward, and the one-way elastic wheel 24 slides upward along the side of the cable, and drives the coil between it and the cable to move upward, pulling the melted position on the lower side of the coil apart. As the connecting column 22 moves upward, the pressure between the reset chambers 251 gradually decreases, and the clamping elastic member 26 gradually recovers under its own elasticity. The clamping elastic member 26 drives the two one-way clamping wheels 27 to slide and reset along the surface of the cable, clamping the coil between the two one-way clamping wheels 27. Then the connecting column 22 drives the extrusion elastic member 23 and the piston rod 25 to move upward, and the piston rod 25 drives the fused coil to move upward through the clamping elastic member 26 and the two one-way clamping wheels 27, removing the coil from the cable surface.

[0046] During the rotation of the transmission member 21, the transmission member 21 drives the connecting column 22 and all parts thereon to rotate and reset through the bracket. At this time, the control terminal controls the telescopic end of the second push rod 16 to extend, and the telescopic end of the second push rod 16 drives the unlocking block 28 to move upward through the bracket. The unlocking block 28 gradually contacts with the two one-way clamping wheels 27 and squeezes the two one-way clamping wheels 27 to both sides respectively, so that the two one-way clamping wheels 27 lose contact, and the coil clamped between the two one-way clamping wheels 27 falls. Then the control terminal controls the telescopic end of the second push rod 16 to shrink and reset, and the telescopic end of the second push rod 16 drives the unlocking block 28 to move downward through the bracket. The unlocking block 28 gradually loses contact with the two one-way clamping wheels 27. At this time, the two one-way clamping wheels 27 are reset under the elastic force of the clamping elastic member 26.

[0047] After the telescopic end of the first push rod 8 is reset, the control terminal starts the first electric slide rail 2, and the first electric slide rail 2 drives all parts thereon to move backward and reset through its upper slider. Then the control terminal stops the first electric slide rail 2 and controls the first electric rotating shaft 4 to rotate counterclockwise 90°. The first electric rotating shaft 4 drives the transmission cylinder 5 to rotate and reset. At this time, the cleaning of the winding wire ends on the cable is completed, and the control terminal continues to start the inspection device 1 to move forward along the cable.

[0048] Example 2: Based on Example 1, please refer to Figure 9-13, and further includes a third push rod 29, which is electrically connected to the control terminal. The third push rod 29 is installed at the front of the lower side of the inspection device 1. The telescopic end of the third push rod 29 is fixedly connected to a second electric slide rail 30 electrically connected to the control terminal. The left and right sides of the second electric slide rail 30 are slidably connected to the inspection device 1. The second electric slide rail 30 is slidably connected to a support moment block 31 through a slider. The upper side of the support moment block 31 is fixedly connected to a guide frame 32. The guide frame 32 consists of two arc guide rails and a bracket. The guide frame The bracket of the guide frame 32 is rotatably connected with a rotating drum 33, the bracket of the guide frame 32 is installed with a fourth electric shaft 34, the fourth electric shaft 34 is electrically connected to the control terminal, the front side of the fourth electric shaft 34 is fixedly connected with an electric heating rod 35 through the bracket, the electric heating rod 35 is electrically connected to the control terminal, the guide frame 32 is limitedly slidably connected with two shifting pieces 36 distributed in left and right mirror images, initially the shifting piece 36 is located on the upper limit sliding of the circular arc guide rail of the adjacent guide frame 32, a spring is fixedly connected between the shifting piece 36 and the rotating drum 33, and the shifting piece 36 is connected with the rotating drum 33. The rotating drum 33 is limited in position. When the two dials 36 slide along the arc guide rails of the adjacent guide frames 32 to the end close to the rotating drum 33, the dial 36 enters the rotating drum 33 and loses contact with the guide frame 32. A pull rope 37 is fixedly connected to the lower side of the rear of the dial 36. A connecting plate 38 fixed to the two pull ropes 37 is slidingly connected to the middle of the rotating drum 33. The pull rope 37 passes through the front of the rotating drum 33. A fourth push rod 39 is fixedly connected to the bracket on the rear side of the guide frame 32. The fourth push rod 39 is electrically connected to the control terminal. The telescopic end of the push rod 39 passes through the rotating drum 33, and the telescopic end of the fourth push rod 39 is connected to the connecting disk 38 for limited rotation. The connecting disk 38 is driven to move by the telescopic end of the fourth push rod 39. The rear side of the guide frame 32 is fixed with a motor 40 electrically connected to the control terminal through a bracket. The output shaft of the motor 40 and the rear side of the rotating drum 33 are transmitted through a gear set. The rotation of the rotating drum 33 drives the two dials 36 to rotate, and the kite line or balloon line clamped between the two dials 36 is wrapped around the outside of the two dials 36.

[0049] Please refer to Fig.14 A connecting plate 41 is sealed and slidably connected inside the dial piece 36, and an extrusion column 42 slidably connected to the adjacent dial piece 36 is fixedly connected to the rear of the lower side of the connecting plate 41. Equidistant spikes 43 are fixedly connected to the lower side of the connecting plate 41. The spikes 43 are used to prevent the kite line or the balloon line from slipping when the dial piece 36 drives the kite line or the balloon line to move. The upper side of the connecting plate 41 cooperates with the adjacent dial piece 36 to form a return cavity 411. Gas is stored in the return cavity 411, and the gas is used to push the connecting plate 41 to move and reset.

[0050] When the kite line and the balloon line are not completely wrapped around the cable, and there is still a section floating in the air (hereinafter referred to as the part of the kite line and the balloon line floating in the air), when the line end is placed on the surface of another cable under the action of wind, a passage is formed between the two adjacent cables through the line end, causing the above two cables to short-circuit. The solution is as follows: when the camera of the inspection device 1 detects the presence of a line end on the surface of the cable (this article takes the left cable as an example), before the inspection device 1 reaches the position of the line end, the control terminal controls the second electric slide rail 30, and the second electric slide rail 30 drives the support moment block 31 and all parts thereon to move left through the slider. When the slider of the second electric slide rail 30 moves to its left side, the second electric slide rail 30 is stopped, and the third push rod 29 is started. The telescopic end of the third push rod 29 extends and pushes the second electric slide rail 30 to move up. The second electric slide rail 30 drives all parts thereon to move up through the slider, so that the center of the guide frame 32 coincides with the central axis of the cable, and the third push rod 29 is stopped at this time.

[0051] As the inspection device 1 continues to move forward, the inspection device 1 drives the dial 36 to move. When the end of the line moves to between the two dials 36 on one side close to the cable, the inspection device 1 stops. At this time, the control terminal starts the fourth push rod 39. The telescopic end of the fourth push rod 39 contracts and drives the connecting plate 38 to move backward. The connecting plate 38 drives the two dials 36 to slide along the guide frame 32 through the two pull ropes 37, and compresses the spring between the dial 36 and the rotating drum 33, so that the two dials 36 move from the quarter points on the left and right sides of the cable to the quarter points on the lower side of the cable. At the same time, the distance between the two dials 36 decreases. In this process, the dial 36 gradually moves away from the end of the line. The two pushers 36 are in contact with each other, and the equidistant spikes 43 are used to prevent the thread end from slipping when moving. As the two pushers 36 slide along the guide frame 32, the two pushers 36 drive the adjacent extrusion columns 42 to gradually contact each other and push the extrusion columns 42 into the adjacent pushers 36. The extrusion columns 42 drive the adjacent equidistant spikes 43 to be retracted into the pushers 36 through the adjacent connecting plates 41. At the same time, the connecting plates 41 move relative to the adjacent pushers 36 to compress the gas in the adjacent return chambers 411. Finally, the two pushers 36 are completely fitted together and the thread end is clamped and fixed. At this time, the two pushers 36 enter the left and right sides of the rotating cylinder 33 respectively and lose contact with the guide frame 32.

[0052] After the dial 36 enters the drum 33, the control terminal stops the fourth push rod 39 and starts the fourth electric shaft 34 and the electric heating rod 35. The fourth electric shaft 34 drives the electric heating rod 35 to swing through the bracket. The distance between the electric heating rod 35 and the two dials 36 gradually decreases, and the electric heating rod 35 gradually contacts the wire ends clamped between the two dials 36 to fuse the wire ends. As the electric heating rod 35 swings, when the line connecting the fourth electric shaft 34 and the center points of the electric heating rod 35 is horizontal, the control terminal stops the fourth electric shaft 34 and starts the motor 40. The output shaft of the motor 40 drives the drum 33 to rotate through the gear set, and the drum 33 drives the two dials 36 to rotate, winding the wire ends between the two dials 36 around the two dials 36 until the wire ends are completely wound around the two dials 36. At this time The control terminal stops the motor 40 and starts the fourth electric shaft 34 and the electric heating rod 35. The fourth electric shaft 34 drives the electric heating rod 35 to swing through the bracket, and the distance between the electric heating rod 35 and the dial 36 gradually decreases. During this process, the electric heating rod 35 contacts the thread ends wrapped around the dial 36 and fuses them. When the distance between the electric heating rod 35 and the dial 36 increases again, the fourth electric shaft 34 and the electric heating rod 35 are stopped and the fourth push rod 39 is started. The telescopic end of the fourth push rod 39 extends out and pushes the connecting disk 38 forward. The connecting disk 38 loosens the two pull ropes 37, so that the two dials 36 slide along the guide frame 32 again under the action of adjacent springs. The distance between the two dials 36 increases and spreads the thread ends wrapped around them, causing the thread ends to fall off and complete the cleaning of the thread ends.

[0053] As the distance between the two dial members 36 gradually increases, the extrusion column 42 and the adjacent equidistant spikes 43 move toward the outside of the adjacent dial members 36 under the push of the gas in the adjacent return chamber 411, and finally reset relative to the adjacent dial members 36. As the two dial members 36 move along the guide frame 32 and gradually reset, after the two dial members 36 are reset, the control terminal stops the fourth push rod 39 and starts the third push rod 29. The telescopic end of the third push rod 29 contracts and drives the second electric slide rail 30 and all parts thereon to move downward and reset. When the telescopic end of the third push rod 29 is reset, the control terminal stops the third push rod 29 and starts the second electric slide rail 30. The second electric slide rail 30 drives all parts thereon to move right and reset through the slider thereon. The control terminal stops the second electric slide rail 30 and enables the inspection device 1 to continue to move forward to inspect and clean the cables in front.

[0054] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A self-propelled foreign body cleaning device for overhead cables, characterized in that: The invention comprises a patrol inspection device (1), wherein the patrol inspection device (1) is installed with and electrically connected to a control terminal, wherein the patrol inspection device (1) is installed with a first electric slide rail (2) electrically connected to the control terminal, wherein the first electric slide rail (2) is slidably connected to a support (3) via a slider, wherein a first electric rotating shaft (4) electrically connected to the control terminal is installed on a side of the support (3) away from the first electric slide rail (2), wherein the first electric rotating shaft (4) is slidably connected to a transmission cylinder (5), wherein the transmission cylinder (5) is fixedly connected to an arc-shaped electric slide rail (6) electrically connected to the control terminal via a bracket, wherein the arc-shaped electric slide rail (6) is slidably connected to a mounting frame (7) via a slider, wherein the mounting frame (7) is fixedly connected to a first push rod (8) electrically connected to the control terminal, wherein the telescopic end of the first push rod (8) is hingedly connected to a connecting frame (9), wherein an electric heating wire (10) electrically connected to the control terminal is installed on the upper side of the connecting frame (9); The mounting frame (7) is limitedly slidably connected to a sliding block in mirror-image distribution, and a second electric shaft (12) electrically connected to a control terminal is installed on a side of the sliding block away from the mounting frame (7), a tension spring is fixedly connected between the sliding block adjacent to the second electric shaft (12) and the mounting frame (7), a friction round table (13) is fixedly connected to a side of the second electric shaft (12) away from the mounting frame (7), the support (3) is fixedly connected to a first limiting column (14) in contact with the transmission cylinder (5), a first guide groove (501) in mirror-image distribution is arranged in the transmission cylinder (5), the first guide grooves (501) in mirror-image distribution are interconnected, and a hemisphere sliding along the first guide groove (501) in mirror-image distribution is arranged on the first electric shaft (4); A support frame (15) is fixedly connected to a side of the inspection device (1) close to the first electric slide rail (2); a second push rod (16) electrically connected to the control terminal is fixedly connected to the support frame (15); a telescopic end of the second push rod (16) is fixedly connected to a limit frame (17) distributed in a mirror image via a bracket; and an elastic sheet (18) is fixedly connected to a side of the limit frame (17) away from the second push rod (16); A third electric rotating shaft (19) and a second limiting column (20) are installed on one side of the support frame (15) close to the second push rod (16); the third electric rotating shaft (19) is electrically connected to the control terminal; the third electric rotating shaft (19) is slidably connected to a transmission member (21) in contact with the second limiting column (20); a second guide groove (211) distributed in a mirror image is provided in the transmission member (21); the second guide grooves (211) distributed in a mirror image are interconnected; a hemisphere sliding along the second guide groove (211) distributed in a mirror image is provided on the third electric rotating shaft (19); a spring is provided between the third electric rotating shaft (19) and the transmission member (21); the transmission member (21) is fixedly connected to a connecting column (22) via a bracket; the connecting column (22) 22) A side close to the inspection device (1) is fixedly connected with an extrusion elastic member (23), the extrusion elastic member (23) is provided with a one-way elastic wheel (24) in a mirror-image distribution, the connecting column (22) is sealingly and slidably connected with a piston rod (25), the piston rod (25) passes through the extrusion elastic member (23) and cooperates with the connecting column (22) to form a reset chamber (251), gas is stored in the reset chamber (251), the side of the piston rod (25) away from the connecting column (22) is fixedly connected with a clamping elastic member (26), the clamping elastic member (26) is provided with a one-way clamping wheel (27) in a mirror-image distribution, and the second push rod (16) is fixedly connected with an unlocking block (28) that is extruded and matched with the one-way clamping wheel (27) in a mirror-image distribution through a bracket; A 180° protrusion is provided on a side of the transmission cylinder (5) away from the arc-shaped electric slide rail (6), and the transmission cylinder (5) is limitedly matched with the first limiting column (14) through the protrusion thereon; a 180° groove is provided on a side of the transmission member (21) away from the extrusion elastic member (23), and the transmission member (21) is limitedly matched with the second limiting column (20) through the groove thereon, so as to limit the angle at which the transmission cylinder (5) and the transmission member (21) can rotate.

2. A self-propelled foreign body cleaning device for overhead cables according to claim 1, characterized in that: The connecting frame (9) is slidably connected to supporting legs (11) distributed in a mirror image, a tension spring is fixedly connected between the supporting legs (11) and the connecting frame (9), and friction exists at the hinge between the telescopic end of the first push rod (8) and the connecting frame (9).

3. The self-propelled foreign body cleaning device for overhead cables according to claim 1, characterized in that: The elastic force of the spring between the third electric rotating shaft (19) and the transmission member (21) is greater than the gravity of the transmission member (21) and all parts thereon, and is used to limit the movement sequence of the transmission member (21).

4. The self-propelled foreign body cleaning device for overhead cables according to claim 1, characterized in that: The pressure of the gas in the resetting chamber (251) is greater than the force of deformation of the clamping elastic member (26), and is used to control the timing of the one-way clamping wheels (27) distributed in mirror images approaching each other.

5. The self-propelled foreign body cleaning device for overhead cables according to claim 1, characterized in that: The invention also comprises a third push rod (29) electrically connected to the control terminal, the third push rod (29) being installed in the inspection device (1), the telescopic end of the third push rod (29) being fixedly connected to a second electric slide rail (30) slidably connected to the inspection device (1), the second electric slide rail (30) being electrically connected to the control terminal, the second electric slide rail (30) being slidably connected to a support moment block (31) via a slider, the support moment block (31) being fixedly connected to a guide frame (32) on a side away from the inspection device (1), the guide frame (32) being rotatably connected to a rotating drum (33), the guide frame (32) being installed with a fourth electric rotating shaft (34) electrically connected to the control terminal, the fourth electric rotating shaft (34) being fixedly connected to an electric heating rod (35) electrically connected to the control terminal via a bracket, the guide frame (32) being limitedly slidably connected to a mirror-distributed dial A spring is fixedly connected between the shifting member (36) and the rotating drum (33); the shifting member (36) and the rotating drum (33) are limitedly matched; a pull rope (37) is fixedly connected to the shifting member (36); a connecting disk (38) is limitedly slidably connected inside the rotating drum (33); the pull rope (37) passes through the rotating drum (33) and is fixedly connected to the connecting disk (38); a fourth push rod (39) electrically connected to a control terminal is fixedly connected to a side of the guide frame (32) away from the mirror-distributed shifting member (36); a telescopic end of the fourth push rod (39) passes through the rotating drum (33) and is limitedly rotatably connected to the connecting disk (38); a motor (40) is fixedly connected to the guide frame (32) via a bracket; the motor (40) is electrically connected to the control terminal; and a gear set is used for transmission between the output shaft of the motor (40) and the rotating drum (33).

6. A self-propelled foreign body cleaning device for overhead cables according to claim 5, characterized in that: A connecting plate (41) is sealingly and slidably connected inside the shifting member (36); a squeeze column (42) is fixedly connected to a side of the connecting plate (41) close to the rotating cylinder (33); the squeeze column (42) is slidably connected to an adjacent shifting member (36); a side of the connecting plate (41) close to an adjacent squeeze column (42) is fixedly connected to equidistant spikes (43); the connecting plate (41) cooperates with the adjacent shifting member (36) to form a return cavity (411); gas is stored in the return cavity (411).

Images