Piezoelectric ultrasonic vibrator driving type maintenance mechanical arm applied to severe working conditions
Technical Field
The invention relates to a maintenance mechanical arm device applied to environments which are not suitable for manual operation, such as a strong magnetic field and strong radiation, in particular to a maintenance mechanical arm device applied to a strong magnetic field and strong radiation working condition.
Background
The inside and outside surface area and the volume of the Tokamak device are large, and the inner wall is generally manufactured in blocks and then is assembled by a process design method. Taking EAST as an example, the size of a unit block constituting the inner wall thereof is generally 0.25 m2About (50cm × 50cm), weighing several tens of kilograms. In order to prevent radiation and leakage accidents, the minimum welding and assembling precision is required to be +/-2 mm. After the ITER is operated, the temperature of the inner wall is up to 120-200 ℃, and the heat energy density can reach 5MW/m when being started2And can reach 0.5MW/m when the device is turned off2Degree of vacuum of 10-6Pa, the magnetic field intensity can reach 6.2T, and the gamma radiation can reach up to 10 Gy/h. Such high temperature, high vacuum, high magnetic field and high radiation conditions are extremely dangerous. Even if the maintenance and repair work is in a shutdown state, large high-energy radiation and electromagnetic radiation and a strong magnetic field of about 3.5T still remain at the position of the inner wall of the device, and people cannot directly enter the device to work.
Therefore, in severe working conditions such as a tokamak cavity and the like with strong magnetic field and strong radiation, the operations of equipment such as overhaul, assembly, disassembly, welding, transportation and the like must be completed by adopting a mechanical arm device. In the existing mechanical arm, the rotation of the joint is mostly driven by a motor, and under the working conditions of strong magnetic field and strong radiation, the motor is very likely to cause signal loss or interference error, which is very dangerous for expensive equipment to be repaired and mechanical arms with loads, so that the development of a mechanical arm device capable of being applied to the working conditions of strong magnetic field and strong radiation is urgently needed.
Disclosure of Invention
The piezoelectric ultrasonic vibrator driving type maintenance mechanical arm applied to the severe working conditions is high in automation degree and degree of freedom, the rotation of the joint is driven by a hydraulic motor, the operation is stable, the anti-interference capability is high, and the piezoelectric ultrasonic vibrator driving type maintenance mechanical arm can adapt to the working environment with strong magnetic field and strong radiation.
The technical scheme adopted by the invention is as follows: the utility model provides a be applied to piezoelectricity ultrasonic vibrator driving type maintenance arm of abominable operating mode, includes base, universal caster, wire rope, frame, guide rail, hydro-cylinder, pulley, revolving stage bearing, rotor, piezoelectricity ultrasonic vibrator, sealed lid, slider, first festival arm, second festival arm, third festival arm, fourth festival arm, fifth festival arm, sixth festival arm, seventh festival arm, L shape frame, extension platform, tongs mechanism, left camera, right camera, its characterized in that: the universal caster has self-locking function, and four universal casters are installed in the base downside, make the base can realize omnidirectional movement, and operation handrail and balancing weight are installed in base upside rear end, and frame fixed mounting is in base upside front end, and frame rear side lower extreme is equipped with the wire rope connecting seat, and the vertical direction of frame front side is equipped with two guide rails, and the hydro-cylinder is installed in frame central point and puts, and the pulley rotation is installed on the top of hydro-cylinder push rod, and first festival arm rear end is equipped with four sliders, two liang of installation of four sliders are on two guide rails, make first festival arm and frame constitute the sliding pair, and wire rope one end is connected in the wire rope connecting seat, and the other end.
Further, as shown in fig. 2, the piezoelectric ultrasonic vibrators are provided with driving feet and a mounting seat, as shown in fig. 3, a cylindrical cavity is arranged in the vertical direction of the front end of the first section arm, a turntable bearing is arranged between the first section arm and the second section arm, so that the first section arm and the second section arm form a revolute pair, a rotor is fixedly connected with the second section arm through screws, the mounting seats of the three piezoelectric ultrasonic vibrators are uniformly arranged on the inner wall of the cavity of the first section arm through screws, the driving feet of the three piezoelectric ultrasonic vibrators are in compression contact with the inner wall of the rotor, a sealing cover is arranged on the lower side of the front end of the first section arm, the cavity of the front end of the first section arm is isolated from the outside air, and dust pollution is prevented.
Further, as shown in fig. 4, the front end of the second arm section is vertically provided with a cylindrical cavity, a turntable bearing is installed between the second arm section and the third arm section, so that the first arm section and the third arm section form a revolute pair, a rotor is fixedly connected with the third arm section through a screw, mounting seats of three piezoelectric ultrasonic vibrators are uniformly installed on the inner wall of the cavity of the second arm section through screws, driving feet of the three piezoelectric ultrasonic vibrators are in compression contact with the inner wall of the rotor, a sealing cover is installed on the lower side of the front end of the second arm section, the third arm section, the fourth arm section and the fifth arm section are identical in structure, a connecting structure between the third arm section and the fourth arm section, a connecting structure between the fourth arm section and the fifth arm section, and a connecting structure between the fifth arm section and the sixth arm section are identical to a connecting structure between the second arm section and the third arm section, and therefore description is omitted.
Further, as shown in fig. 5, a cylindrical cavity is horizontally arranged at the front end of the sixth arm, a turntable bearing is installed between the sixth arm and the L-shaped frame, so that the sixth arm and the L-shaped frame form a revolute pair, a rotor is fastened and connected with the L-shaped frame through screws, mounting seats of three piezoelectric ultrasonic vibrators are uniformly installed on the inner wall of the cavity of the sixth arm through screws, driving feet of the three piezoelectric ultrasonic vibrators are in compression contact with the inner wall of the rotor, and a sealing cover is installed at the opening of the cavity at the front end of the sixth arm.
Further, as shown in fig. 5, the seventh arm is fastened and connected to the L-shaped frame by screws, a cylindrical cavity is provided inside the seventh arm, a turntable bearing is installed between the front end of the seventh arm and the expansion platform, so that the seventh arm and the expansion platform constitute a revolute pair, the mounting seats of the three piezoelectric ultrasonic vibrators are uniformly installed on the inner wall of the cavity of the seventh arm by screws, the driving feet of the three piezoelectric ultrasonic vibrators are in compression contact with the inner wall of the rotor, and the rotor is connected to the expansion platform.
Furthermore, the gripper mechanism is fixedly connected with the expansion table through a screw, and two cameras are mounted on the gripper mechanism and used for an operator to observe the operation environment around the mechanical arm.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of a piezoelectric ultrasonic vibrator according to the present invention.
FIG. 3 is a schematic partial sectional view of a connection position of a first arm and a second arm according to the present invention.
Fig. 4 is a schematic view of a partial cross-sectional structure in the vertical center plane of the present invention.
Fig. 5 is a schematic view of a partial cross-sectional structure in the horizontal plane of the present invention.
FIG. 6 is a schematic view of any of the positions of the present invention.
Reference numerals: 0.1 driving foot, 0.2 piezoelectric ceramic piece, 0.3 mounting base, 0.4 metal base body, 1 base, 1.1 universal caster, 1.2 balancing weight, 1.3 operating armrest, 2 steel wire rope, 3 frame, 3.1 steel wire rope connecting base, 3.2 guide rail, 4 oil cylinder, 4.1 pulley, 5 first section arm, 5.1 turntable bearing, 5.2 rotor, 5.3 piezoelectric ultrasonic vibrator, 5.4 sealing cover, 5.5 slider, 6 second section arm, 6.1 turntable bearing, 6.2 rotor, 6.3 piezoelectric ultrasonic vibrator, 6.4 sealing cover, 7 third section arm, 8 fourth section arm, 9 fifth section arm, 9.2 rotor, 9.3 piezoelectric ultrasonic vibrator, 10 sixth section arm, 10.1 bearing, 10.2 rotor, 10.3 piezoelectric ultrasonic vibrator, 10.4 sealing cover, 11L-shaped frame, 12 seventh section arm, 12.1 turntable bearing, 12.2 rotor, 12.3 piezoelectric ultrasonic vibrator, 13.1 ultrasonic vibrator, 13 ultrasonic vibrator, 15.15 camera head, 15.1 camera head and a left hand-expanding camera head.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, a piezoelectric ultrasonic vibrator driving type maintenance mechanical arm applied to a severe working condition includes a base 1, a universal caster 1.1, a steel wire rope 2, a frame 3, a guide rail 3.2, an oil cylinder 4, a pulley 4.1, a turntable bearing (5.1, 6.1, 10.1, 12.1), a rotor (5.2, 6.2, 9.2, 10.2, 12.2), a piezoelectric ultrasonic vibrator (5.3, 6.3, 9.3, 10.3, 12.3), a sealing cover (5.4, 6.4, 10.4), a slider 5.5, a first joint arm 5, a second joint arm 6, a third joint arm 7, a fourth joint arm 8, a fifth joint arm 9, a sixth joint arm 10, a seventh joint arm 12, an L-shaped frame 11, an expansion table 13, a gripper mechanism 14, a left camera 15.1, and a right camera 15.2, and is characterized in that: universal caster 1.1 has self-locking function, and four universal casters 1.1 are installed in 1 downside of base, make base 1 can realize omnidirectional movement, and operation handrail 1.3 and balancing weight 1.2 are installed in 1 upside rear end of base, and 3 fixed mounting in the 1 upside front end of base in frame, and 3 rear side lower extremes of frame are equipped with wire rope connecting seat 3.1, and the vertical direction in 3 front sides of frame is equipped with two guide rails 3.2, and hydro-cylinder 4 is installed in 3 central point in the frame, and pulley 4.1 rotates the top of installing in hydro-cylinder 4 push rod, and 5 rear ends of first festival arm are equipped with four sliders 5.5, four sliders 5.5 are two liang installed on two guide rails 3.2, make first festival arm 5 and frame 3 constitute the sliding pair, and 2 one end of wire rope are connected in wire rope connecting seat 3.1, and the other end is connected with 5 upper ends of.
As shown in fig. 2, the piezoelectric ultrasonic vibrators (5.3, 6.3, 9.3, 10.3, 12.3) are provided with a driving foot 0.1 and a mounting seat 0.3, as shown in fig. 3, a cylindrical cavity is arranged in the vertical direction at the front end of the first knuckle arm 5, a turntable bearing 5.1 is arranged between the first knuckle arm 5 and the second knuckle arm 6, so that the first knuckle arm 5 and the second knuckle arm form a revolute pair, a rotor 5.2 is fixedly connected with the second knuckle arm 6 through screws, the mounting seats 0.3 of the three piezoelectric ultrasonic vibrators 5.3 are uniformly arranged on the inner wall of the cavity of the first knuckle arm 5 through screws, the driving feet 0.1 of the three piezoelectric ultrasonic vibrators 5.3 are all in compression contact with the inner wall of the rotor 5.2, and a sealing cover 5.4 is arranged on the lower side of the front end of the first knuckle arm 5 to isolate the cavity at the front end of the first knuckle arm 5 from the outside air, thereby.
As shown in fig. 4, a cylindrical cavity is vertically arranged at the front end of the second arm segment 6, a turntable bearing 6.1 is arranged between the second arm segment 6 and the third arm segment 7, so that the two arms form a revolute pair, a rotor 6.2 is fixedly connected with the third arm segment 7 through screws, mounting seats 0.3 of three piezoelectric ultrasonic vibrators 6.3 are uniformly mounted on the inner wall of the cavity of the second arm segment 6 through screws, driving feet 0.1 of the three piezoelectric ultrasonic vibrators 6.3 are in pressing contact with the inner wall of the rotor 6.2, a sealing cover 6.4 is mounted on the lower side of the front end of the second arm segment 6, the structures of the second arm segment 6, the third arm segment 7, the fourth arm segment 8 and the fifth arm segment 9 are completely the same, the connection structure between the third arm segment 7 and the fourth arm segment 8, the connection structure between the fourth arm segment 8 and the fifth arm segment 9, and the connection structure between the fifth arm segment 9 and the sixth arm segment 10 are the same as the connection structure between the second arm segment 6 and the third arm segment 7, and thus will not be described in detail.
As shown in fig. 5, a cylindrical cavity is horizontally arranged at the front end of the sixth arm 10, a turntable bearing 10.1 is installed between the sixth arm 10 and the L-shaped frame 11, so that the sixth arm 10 and the L-shaped frame form a revolute pair, a rotor 10.2 is fastened and connected with the L-shaped frame 11 through screws, mounting seats 0.3 of three piezoelectric ultrasonic vibrators 10.3 are uniformly installed on the inner wall of the cavity of the sixth arm 10 through screws, driving feet 0.1 of the three piezoelectric ultrasonic vibrators 10.3 are in compression contact with the inner wall of the rotor 10.2, and a sealing cover 10.4 is installed at an opening of the cavity at the front end of the sixth arm 10.
As shown in fig. 5, the seventh-section arm 12 is fastened and connected with the L-shaped frame 11 by screws, a cylindrical cavity is arranged inside the seventh-section arm 12, a turntable bearing 12.1 is installed between the front end of the seventh-section arm 12 and the extension platform 13, so that the seventh-section arm 12 and the extension platform form a revolute pair, the mounting seats 0.3 of the three piezoelectric ultrasonic vibrators 12.3 are uniformly installed on the inner wall of the cavity of the seventh-section arm 12 by screws, the driving feet 0.1 of the three piezoelectric ultrasonic vibrators 12.3 are all in pressing contact with the inner wall of the rotor 12.2, and the rotor 12.2 is connected with the extension platform 13.
The gripper mechanism 14 is fixedly connected with the expansion table 13 through screws, and two cameras (15.1 and 15.2) are mounted on the gripper mechanism 14 and used for an operator to observe the operation environment around the mechanical arm.
The embodiment of the invention comprises the following steps:
as shown in fig. 4, the operation armrest 1.3 can control the maintenance mechanical arm (the present invention) to move and rotate freely on the ground, the oil cylinder 4 stretches and retracts to realize the ascending and descending of each arm section, the two cameras (15.1 and 15.2) arranged on the gripping mechanism 14 can feed back the shot pictures to the operator in time, and the extension table 13 can realize six degrees of freedom under the matching drive of the oil cylinder 4 and each piezoelectric ultrasonic vibrator, so that the gripping mechanism 14 arranged on the extension table 13 can flexibly complete maintenance tasks in a severe working condition environment.
According to the actual working condition, the number of the knuckle arms can be increased or reduced, so that the working space of the maintenance mechanical arm (the invention) is increased or reduced.