A power transmission line parallel groove clamp convenient for robot maintenance

Abstract

The present invention relates to a transmission line parallel groove clamp that is convenient for robot maintenance, belongs to the field of power hardware technology, and comprises an upper plate, a pressure block, a rivet nut, an upper sleeve, a pull plate, a lower plate, a lower sleeve and a set screw. The set screw is screwed into the rivet nut to make the pressure block move upward, tighten the pull plate, and prevent loosening reliably; the upper plate and the lower plate are wrapped tightly, and the upper sleeve and the lower sleeve are used to wrap the wire together to maintain a reliable connection. The lower plate is subjected to tensile force, and its strength is less than that of the upper plate. It can automatically adapt to the relative position and shape of the wire and enhance the wrapping effect; the strength and hardness of the upper sleeve and the lower sleeve are both less than that of the wire, and they can automatically adapt to the relative position and surface shape of the wire, increase the effective contact area, maintain the effective conductive area, and avoid overheating; the assembly and disassembly process does not affect the relative position of the wire, and parts are not assembled during installation; the safety, reliability and convenience of robot detection, tightening and assembly and disassembly operations can be improved. The pull plate is elastic and can compensate for adaptive deformation, wrapping force, creep and stress relaxation.

Description

Technical Field

[0001] The invention relates to a parallel groove wire clamp, in particular to a parallel groove wire clamp used for power transmission lines, belonging to the technical field of electric power hardware. Background Art

[0002] The parallel groove clamp installed on the transmission line is used for the connection of conductors, jumpers or lightning conductors under the condition of not bearing full tension. It belongs to the connection hardware, mainly including bolt-type, wedge-type and H-type parallel groove clamps. The bolt-type parallel groove clamp relies on bolts and nuts to fix the conductor in the grooved clamp to complete the connection. The bolt transmits pressure through flat washers and spring washers, providing sufficient, uniform and constant pressure for the conductor. It is removable, but human factors have a greater impact on the tightening degree of the bolts. Bolt-type parallel groove clamps include equal-diameter and different-diameter parallel groove clamps.

[0003] Due to the large contact resistance, the parallel groove clamp is recognized as the weakest link in the electrical connection of the transmission line. Due to the creep and stress relaxation of metal materials, coupled with the influence of processing errors, the effective contact area between the clamp plate of the parallel groove clamp and the conductor is small, only 7% of the nominal contact area. In addition, the parallel groove clamp is installed on the transmission line at high altitude, with large wind and temperature differences, and is subjected to wind, frost, rain, snow and atmospheric pollution and erosion for a long time. Environmental erosion and temperature changes cause the clamp plate of the parallel groove clamp to warp and deform, allowing liquid and solid pollutants such as water, grease, mud and dust to invade, resulting in a reduction in effective contact area and conductive area, and a gradual increase in contact resistance; it also intensifies the oxidation and corrosion of the contact surface, increasing its membrane resistance. Therefore, during operation, the parallel groove clamp of the transmission line often overheats, deforms, and the bolts loosen, and even burns red, melts and breaks, which seriously threatens the safe operation of the transmission line.

[0004] In order to ensure reliable connection, the invention patent with application number 201210539062.0 discloses a constant gripping force anti-creep deformation parallel groove wire clamp, which is connected between the lower pressure piece and the upper pressure piece through the screw through the core; the lower pressure piece has a positioning mark, and the upper pressure piece has a gripping force positioning piece; the upper pressure piece is a hollow conductor with elastic function, which can automatically compensate for the change in the wire diameter of the connected wire, ensure the reliable connection of the wire, and will not loosen or increase the contact resistance; when the screw is tightened to achieve the best gripping force, the gripping force positioning piece coincides with the positioning mark, indicating that the installation is in place, ensuring the installation quality. The utility model patent with application number 201620032957.9 discloses a wrap-through parallel groove wire clamp, which is formed by a lower clamping plate, an upper clamping plate and a clamping bolt; there is a clamping body between the lower clamping plate and the upper clamping plate, and the clamping groove of the clamping body corresponds to the clamping groove of the lower clamping plate and the upper clamping plate; it is safe and reliable, has a good connection effect, is easy to operate, and has a low cost. The utility model patent with application number 202120305399.X discloses an anti-loosening parallel groove wire clamp, including a wire clamp seat, a locking assembly and a reverse clamping assembly. The main line and the branch line are clamped by the locking assembly, and the locking assembly is reversely clamped by the reverse clamping assembly to ensure that the locking assembly does not loosen, thereby achieving a double protection effect.

[0005] When performing live work during manual maintenance, it is necessary to use the equipotential method or the location method, and use special tools or insulating operating rods to tighten or replace the parallel groove clamp. When removing bolts and nuts, it is easy to cause the nuts to fall off; when installing, it is necessary to assemble the lower clamp, the upper clamp, the bolts and the nuts, which is easy to misoperate and cause falling objects from high altitude, posing a greater safety risk. In addition, the maintenance of the parallel groove clamp of the transmission line requires manual high-altitude work, with a poor working environment, high labor intensity, low efficiency and high risk. In order to facilitate assembly, disassembly and fastening, the invention patent with application number 201710222200.5 discloses a quick-release parallel groove clamp with T-connected branches, wherein the clamp body is symmetrically arranged on the left and right sides of the clamp body, the buckle body is arranged on the left and right sides of the clamp body, and a V-shaped hook is arranged on the buckle body; a hanging groove is arranged on the left and right sides of the clamp body; the hanging groove cooperates with the V-shaped hook; a threaded hole is arranged on the flat top of the buckle body, and the top tightening bolt is screwed in the threaded hole; the contact resistance is small and the installation and disassembly are convenient. The utility model patent with application number 201621375847.9 discloses a parallel groove wire clamp, in which a fastener for fixing the wire is arranged on the top of the shell; a partition is arranged inside the shell to form two upper and lower wire clamping grooves; the wire clamping grooves are arranged up and down, and after the fasteners at the top are clamped, it is easier to apply force and clamp the wires, solving the problem of poor wire clamping effect. The utility model patent with application number 201921747843.2 discloses a joint parallel groove wire clamp, including an upper wiring clamp, a lower wiring clamp, a fastening bolt and a fastening nut, and a joint component is arranged to connect the upper wiring clamp and the lower wiring clamp; when the wire is inserted into the wire clamp, the risk of the upper wiring clamp or the lower wiring clamp falling from a high altitude is reduced, and it is convenient to place the wire in the parallel groove wire clamp.

[0006] In the inspection and maintenance, infrared thermal imagers or infrared thermometers are currently widely used to detect the temperature of power fittings. In order to facilitate detection, current power fittings use color-changing temperature indication or other detection elements. For example, the invention patent with application number 202020648016.4 discloses a tension clamp for carbon fiber conductors, including a thermochromic drainage clamp and a thermochromic liner. When the temperature of the tension clamp body exceeds the preset temperature, it will change color, and restore the original color when the temperature drops below the preset temperature; it can be visually observed and judged whether the tension clamp in operation is overheated. The utility model patent with application number 201620131194.3 discloses a tension clamp for power transmission lines. A color-changing thermal sheet that changes color with temperature is attached to the outside of the drainage plate, and the temperature condition can be known by visual inspection alone.

[0007] Existing robot inspection technology has developed rapidly. The invention patent with application number 202010750096.9 proposes a method for detecting defects in small-sized hardware fittings for power transmission lines based on an improved SSD model, improves the structure of the SSD target detection network model, and performs corrosion status detection and pin missing detection on small-sized hardware fittings detected by the network model, thus realizing intelligent recognition of small-sized hardware defects in inspection images. The invention patent with application number 202110257314.X proposes a transmission line inspection flying robot with two machines, which realizes fixed-point shooting and can obtain close-up clear images of small-sized hardware fittings, avoiding the problems of shooting blind spots and insufficient pixels.

[0008] The tightening, installation and removal of the parallel trench line clamps of existing transmission lines are completed manually at high altitudes. The tightening degree is difficult to accurately control and detect. It is also difficult to use the existing intelligent inspection methods based on visual image processing, artificial intelligence, big data and wireless communication technology to judge the tightening degree, tightening status and operating status, which needs to be improved. Summary of the invention

[0009] The purpose of the present invention is to provide a power transmission line parallel groove clamp that is convenient for robot maintenance, improve its structure, maintain an effective conductive area during operation, and improve the reliability of electrical connection; it can detect its operating status through existing intelligent inspection methods to avoid loosening and overheating; during robot maintenance, the detection, tightening and disassembly operations are safe, reliable and convenient. The orientation described in this specification is based on the horizontal installation position of the parallel groove clamp; Figure 1 In the embodiment, the parallel groove wire clamp of the present invention is in a horizontal installation position; the direction close to the reader is the front, and the opposite direction is the rear; the front and rear directions are the lateral directions; and so on. The specific technical solutions of the present invention are as follows.

[0010] A power transmission line paralleling clamp convenient for robot maintenance comprises an upper plate 1, a pressure block 2, a rivet nut 3, an upper sleeve 4, a pull plate 5, a lower plate 6, a lower sleeve 7 and a set screw 8, as shown in FIG. Figure 1 As shown; the set screw 8 is screwed into the rivet nut 3 to drive the pressure block 2 upward, tighten the pull plate 5, and prevent it from loosening reliably; the upper plate 1 and the lower plate 6 are wrapped tightly, so that the upper sleeve 4 and the lower sleeve 7 jointly wrap the two parallel wires, so that the wires remain reliably connected.

[0011] The pulling plate 5 is elastic and installed above the upper plate 1. It is hinged to the lower plate 6 at the left end and hung to the lower plate 6 at the right end. The lower surface in the middle is attached to and pressed against the upper surface of the pressing block 2 to obtain tension and tighten, so that the upper plate 1 and the lower plate 6 obtain a tightening force and are tightened.

[0012] The upper plate 1 adopts a rigid structure and is subjected to compression under the tension of the pull plate 5. Under the tension of the pull plate 5, the lower plate 6 is subjected to tension, and its structural strength is smaller than that of the upper plate 1, so that it can produce adaptive deformation, automatically adapt to the relative position of the wire and the overall shape of the contact part, and enhance the tightening effect of the upper sleeve 4 and the lower sleeve 7 on the wire; so that the relative position of the wire is not affected during the assembly and disassembly process, and it is convenient to replace during maintenance.

[0013] The upper sleeve 4 and the lower sleeve 7 have a strength and hardness less than that of the wire. Under the tightening action of the upper plate 1 and the lower plate 6, they can automatically adapt to the relative position of the wire and the microscopic surface shape of the contact part, produce adaptive deformation, improve the closeness of contact with the wire, increase the effective contact area, maintain the effective conductive area during operation, and avoid overheating. Under the vibration of the wire during operation, the contact stress fluctuations between the upper sleeve 4 and the lower sleeve 7 and the wire are generated on their contact surfaces, which can promote the micro-friction of the contact surface to eliminate the inorganic film, reduce the film resistance, and maintain the effective conductive area during operation.

[0014] Before installation, the upper plate 1 accommodates the pressure block 2, and is riveted together with the upper sleeve 4 through the rivet nut 3. The set screw 8 is screwed into the rivet nut 3, and the lower sleeve 7 is fixed to the lower plate, so that no parts assembly is required during installation and no parts separation is required during disassembly, which can effectively prevent parts from accidentally falling and objects from falling from high altitudes, thereby improving the safety, reliability and convenience of robot detection, fastening and assembly and disassembly operations.

[0015] The upper plate 1 is a rigid curved plate placed horizontally in the longitudinal direction, with a rivet hole 11 on the left side of the upper surface, a transverse groove 13 in the middle of the upper surface, a circular pit 12 on the bottom of the groove 13, an upper plate hole 14 at the center of the bottom of the pit 12, an upper handle 15 on the right side of the upper surface, and an upper plate ventilation hole 16 in the center of the upper surface; rivets are riveted through the rivet holes 11 to rivet the pull plate 5 and the upper plate 1 together; the rivet nut 3 is passed through the upper plate hole 14 and riveted together with it; the rivet nut 3 is pressed and accommodated through the pit 12; the pressure block 2 is accommodated through the groove 13.

[0016] The upper plate 1 has mutually parallel transverse semi-cylindrical surfaces on the left and right sides of the lower surface. The semi-cylindrical surfaces are attached to and pressed against the upper sleeve 4, driving the upper sleeve 4 and the lower sleeve 7 to jointly wrap the wire tightly, so that the wire is reliably connected. The pit 12 is a vertical cylindrical structure with a horizontal bottom surface and a vertical side surface. The bottom surface is attached to and pressed against the rivet nut 3 to balance the axial reaction force of the rivet nut 3, so that the upper plate 1 and the lower plate 6 are wrapped tightly; the side surface is loosely matched with the rivet nut 3 to accommodate and fix the rivet nut 3; it can produce a slight bending deformation to improve the adaptive ability to the relative position and shape of the wire; it can also resist excessive bending deformation of the upper plate 1 and enhance the wrapping effect.

[0017] The groove 13 is a horizontal flat rectangular structure, which accommodates the pressing block 2. The groove 13 has an elastic color-changing rubber ring on the side, which is attached and pressed against the pressing block 2 by the color-changing rubber ring, and has a color-changing temperature indication function, which is convenient for observation by taking visible images to avoid overheating; it also has a sealing function to prevent the invasion of pollutants in the environment. The color-changing rubber ring is a closed annular structure, which is elastic and has a reversible color-changing temperature indication function. It is fixedly connected to the side of the groove 13 on the outer surface. The upper plate hole 14 is circular and is located at the center of the bottom surface of the pit 12. It passes through the upper plate 1 from top to bottom, passes through the rivet nut 3, and is riveted together with it; so that the rivet nut 3 is fixed to the upper plate 1 to avoid relative rotation.

[0018] The upper handle 15 is a longitudinal vertical plate structure, which is fixedly connected to the upper surface of the upper plate 1 at the lower end, has a transverse through hole in the middle, and is engaged with the clamping surface of the manipulator on the front and rear surfaces for easy assembly and disassembly. The through hole of the upper handle 15 can pass through a positioning pin, which is used to position the clamping surface of the manipulator to avoid accidental slipping during assembly and disassembly. The upper plate ventilation hole 16 passes through the upper plate 1 from top to bottom, and has a rectangular horizontal cross-section, which is convenient for ventilation and heat dissipation, and can also pass through an operating tool for detection, tightening or assembly and disassembly operations.

[0019] The pressure block 2 is a horizontally flat bar-shaped block, which bulges upward on the upper surface, and is attached and pressed against the lower surface of the pull plate 5 on the upper surface to drive the pull plate 5 to be tensioned. The pressure block 2 has square cavities 21 on the front and rear sides of the lower surface, which accommodate the upper part of the rivet nut 3, and have a clearance fit with the rivet nut 3 on the side of the cavity 21, which has a guiding function. The pressure block 2 has a spherical concave at the center of the top surface of the cavity 21, which abuts against the upper end surface of the set screw 8 through the concave, so that the set screw 8 can drive the pressure block 2 upward to tension the pull plate 5; it can also increase the contact area between the pressure block 2 and the upper end surface of the set screw 8, and cause the pressure block 2 to plastically deform on the upper concave surface, adapt to the shape of the upper end surface of the set screw 8, avoid relative rotation, and ensure reliable anti-loosening.

[0020] Furthermore, the pressing block 2 has a vertical pressing block ventilation hole 22 at the center, such as Figure 2 As shown, it is convenient for ventilation and heat dissipation; it can also pass through operating tools for detection, tightening or assembly and disassembly operations. The compression block ventilation hole 22 passes through the compression block 2 from top to bottom, and has the same shape as the upper plate ventilation hole 16, and is opposite in position. It can pass through the operating tool and rotate 90° to press the compression block 2, upper plate 1, upper sleeve 4, lower plate 6 and lower sleeve 7 to perform detection, tightening or assembly and disassembly operations, making the detection, tightening and disassembly operations safe, reliable and convenient. The compression block 2 is attached and pressed against the groove 13 of the upper plate 1 on the side through the color-changing rubber ring, which can prevent pollutants in the environment from entering the matching gap between the rivet nut 3 and the set screw 8, and has a sealing effect to avoid affecting the tightening and assembly and disassembly of the set screw 8.

[0021] The rivet nut 3 is a vertical cylindrical structure, with a threaded hole 31 at the upper part of the inner surface and a light hole 32 at the lower part of the inner surface. Figure 3 As shown. The threaded hole 31 has an internal thread, which cooperates with the set screw 8 so that the set screw 8 can rotate and move axially relative to the rivet nut 3 to drive the pressure block 2 to move up and down for tightening or assembly and disassembly. The major diameter of the internal thread of the threaded hole 31 is smaller than the diameter of the light hole 32, so that there is a gap between the light hole 32 and the set screw 8, which facilitates the rivet operation of the rivet nut 3 and avoids affecting the cooperation between the threaded hole 31 and the set screw 8.

[0022] Furthermore, the rivet nut 3 has a guide section 33 at the top, a fixed section 34 in the middle, and an upper rivet section 35 and a lower rivet section 36 at the bottom; the guide section 33 is matched with the side clearance of the cavity 21 of the pressure block 2, so that it can move up and down relatively and has a guiding effect; the fixed section 34 is matched with the side clearance of the pit 12 of the upper plate 1, and the upper rivet section 35 is riveted together with the upper plate hole 14 of the upper plate 1, so that the rivet nut 3 is fixed to the upper plate 1 to avoid relative rotation; the lower rivet section 36 is riveted together with the upper sleeve 4, so that the upper sleeve 4 is fixed to the upper plate 1.

[0023] The guide section 33, the fixed section 34, the upper rivet section 35 and the lower rivet section 36 are cylinders which are connected in sequence from top to bottom and are coaxial; the diameter of the fixed section 34 is larger than that of the guide section 33 and the upper rivet section 35, so that the rivet nut 3 has a circular step surface at the lower end of the fixed section 34, and abuts against the bottom surface of the pit 12 of the upper plate 1 through the step surface, so that the rivet nut 3 obtains axial positioning and support; so that the upper plate 1 bears the axial reaction force of the rivet nut 3 to balance the axial force of the rivet nut 3 on the set screw 8, that is, to balance the clamping force of the pressure block 2 on the pull plate 5, so that the pull plate 5 can be tensioned, so that the upper plate 1 and the lower plate 6 obtain a tightening force and are tightened.

[0024] The upper riveting section 35 is located above the lower riveting section 36 and has a larger diameter than the lower riveting section 36, so as to avoid the upper riveting section 35 and the upper plate hole 14 of the upper plate 1 from damaging the outer surface of the lower riveting section 36 during the riveting operation, and to avoid affecting the riveting effect of the lower riveting section 36 and the upper sleeve 4; it also facilitates the riveting operation and saves operating energy. The upper riveting section 35 and the lower riveting section 36 both have axial external teeth on their outer surfaces to facilitate the riveting operation and save operating energy.

[0025] The upper sleeve 4 is a bilaterally symmetrical flat curved plate structure, with upper sleeve holes 41 on both the front and rear sides of the middle part, an upper sleeve ventilation hole 42 in the middle part, and upper wire grooves 43 on the left and right parts; the upper wire grooves 43 are attached and pressed on the upper side surface of the wire on their inner surface to achieve reliable connection of the wire, and the upper wire grooves 43 are attached and pressed on the semi-cylindrical surface of the upper plate 1 on their outer surface to obtain a tightening force. The upper sleeve hole 41 is a vertical circular hole that passes through the upper sleeve 4 from top to bottom, passes through the lower rivet section 36 of the rivet nut 3, and is riveted together with the rivet nut 3 at its lower rivet section 36; so that the upper sleeve 4 is fixed to the upper plate 1.

[0026] The upper sleeve ventilation hole 42 passes through the upper sleeve 4 from top to bottom, and has the same shape and relative position as the upper plate ventilation hole 16, which is convenient for ventilation and heat dissipation, and can also pass through operating tools for detection, tightening or assembly and disassembly operations. The upper wire groove 43 is a transverse semi-cylindrical curved plate, located at the left and right parts of the upper sleeve 4, and is attached and pressed against the semi-cylindrical surface of the lower surface of the upper plate 1 on the outer surface, and is attached and pressed against the upper side surface of the wire on the inner surface to obtain a tightening force, so that the upper sleeve 4 and the lower sleeve 7 can tighten the wire together, so that the wire is reliably connected.

[0027] The pull plate 5 is a longitudinal strip-shaped curved plate, which is located above the upper plate 1 and is attached to and pressed against the upper surfaces of the left and right sides of the upper plate 1; it has a pin hole at the left end, through which a pin shaft is passed to form a hinge, and is hinged to the lower plate 6 through the hinge; it has a rivet hole on the left side, through which a rivet is passed, so that the pull plate 5 and the upper plate 1 are riveted together; the lower surface in the middle is attached to and pressed against the upper surface of the pressure block 2, and the pressure block 2 can be driven upward and tensioned due to the screwing operation of the set screw 8.

[0028] Furthermore, the pull plate 5 has hanging holes 51 on the front and rear sides of the right end, and the lower plate 6 is hung through the hanging holes 51. The pull plate 5 can be tensioned so that the upper plate 1 and the lower plate 6 can obtain a tightening force and tighten, driving the upper sleeve 4 and the lower sleeve 7 to tighten the wire together, so that the wire is reliably connected. The pull plate 5 has a pry handle 52 in the middle of the right end, and the pry handle 52 can be used to pry and press through a rod-shaped tool to disengage the hanging hole 51 from the lower plate 6, which is convenient for disassembly. The pry handle 52 is a horizontal plate-shaped structure, which is fixedly connected to the middle of the right end of the pull plate 5 at the left end, and has a through hole that runs through the middle, which can be used to pry and press through a rod-shaped tool through the through hole to disengage the hanging hole 51 from the lower plate 6, which is convenient for disassembly.

[0029] Furthermore, the pull plate 5 is elastic and can automatically fit the upper surface of the right side of the upper plate 1 on the right side, so that the hanging hole 51 can automatically hang into the lower plate 6 during installation, so that the pull plate 5 can automatically hang on the lower plate 6 during installation, simplifying the operation control of the manipulator, making the robot detection, tightening and disassembly operations safe, reliable and convenient, and improving the operation efficiency. The pull plate 5 is elastic and can automatically compensate for the adaptive deformation of the upper plate 1, the lower plate 6, the upper sleeve 4 and the lower sleeve 7 and their wrapping force on the wire, and can also compensate for creep and stress relaxation caused by changes in current, temperature, wind speed, corrosion, etc.

[0030] The lower plate 6 is a curved plate-like structure placed vertically and bent upward on the left and right sides, with a left outer curved surface, a right outer curved surface, a left inner curved surface and a right inner curved surface. The right outer curved surface is provided with a right reinforcing rib 62, and the upper end of the right reinforcing rib 62 is provided with a downward hook 61, which is hung into the hanging hole 51 of the pull plate 5 through the hook 61, so that the lower plate 6 is hung with the pull plate 5 at the right end.

[0031] The hook 61 protrudes to the right from the right reinforcing rib 62, and has an arc-shaped outer surface and an arc-shaped inner surface that bends downward to the right, forming a downward curved hook; when the pull plate 5 is installed, its right end can automatically slide over the outer surface, which is convenient for hanging operation; through the inner surface, it is hung with the lower edge of the hanging hole 51 of the pull plate 5, ensuring reliable hanging and effectively avoiding accidental unhooking. The right reinforcing rib 62 protrudes from the right outer curved surface of the lower plate 6 to improve the structural strength of the right end of the lower plate 6 at the hook 61, ensuring that the lower plate 6 is reliably hung with the pull plate 5 at the right end.

[0032] Furthermore, the lower plate 6 has a lower handle 63 on the right side of the lower surface, which can be clamped by the manipulator through the lower handle 63, so as to facilitate fastening and assembly and disassembly operations. The lower handle 63 has the same structure as the upper handle 15 of the upper plate 1, and is located opposite to the upper end. It is fixedly connected to the lower surface of the lower plate 6, and has a through hole that runs horizontally through the middle. The front and rear surfaces are clamped with the clamping surface of the manipulator, so as to facilitate fastening and assembly and disassembly operations. The through hole of the lower handle 63 can pass through the positioning pin, which is used to position the clamping surface of the manipulator to avoid accidental slipping during assembly and disassembly operations.

[0033] Furthermore, the lower plate 6 has lower plate holes 64 on both the front and rear sides of the middle of the lower surface, and a lower plate ventilation hole 65 in the middle of the lower surface. The lower plate hole 64 is circular, passes through the lower plate 6 from top to bottom, is concentric with the rivet nut 3, and is larger than the diameter of the rivet section 35 on the rivet nut 3, so that it is convenient to pass a screwing tool through it for fastening or assembly and disassembly operations. The lower plate ventilation hole 65 passes through the lower plate 6 from top to bottom, and has the same structure as the upper plate ventilation hole 16 of the upper plate 1, and is located oppositely, so as to facilitate ventilation and heat dissipation, and can also pass an operating tool through it for detection, fastening or assembly and disassembly operations.

[0034] Furthermore, the lower plate 6 has a left reinforcing rib 66 on the left outer curved surface, and a pin hole is provided at the upper end of the left reinforcing rib 66, through which a pin shaft is passed to form a hinge, and is hinged to the pull plate 5 through the hinge. The left reinforcing rib 66 protrudes from the left outer curved surface of the lower plate 6 to improve the structural strength of the left end of the lower plate 6 at the pin hole position, ensuring that the lower plate 6 is reliably hinged to the pull plate 5 at the left end. The lower plate 6 is attached and pressed against the lower surface of the lower sleeve 7 on both the left inner curved surface and the right inner curved surface to obtain a tightening force, so that the upper sleeve 4 and the lower sleeve 7 can tighten the wire together, so that the wire is reliably connected.

[0035] The lower sleeve 7 is a left-right symmetrical flat curved plate structure, which is opposite to the upper sleeve 4 in up and down, with lower sleeve holes 71 on the front and back sides of the middle part, with a lower sleeve ventilation hole 72 in the middle part, and with lower wire grooves 73 on the left and right parts; the lower wire grooves 73 are attached and pressed on the lower side surfaces of the wires on their inner surfaces, and are attached and pressed on the left and right inner curved surfaces of the lower plate 6 on their outer surfaces to obtain a tightening force; the upper sleeve 4 and the lower sleeve 7 jointly tighten the wires, so that the wires are reliably connected, and the lower sleeve 7 is fixed to the lower plate 6.

[0036] The lower sleeve 7 bulges upward in the middle part between the left and right lower wire grooves 73, and the upper surface of the bulge abuts against the lower surface of the middle part of the upper sleeve 4. After being installed in place, it is tightened and fitted, which can balance the axial reaction force of the rivet nut 3 and resist the slight bending deformation of the upper plate 1; it can also stretch longitudinally to enhance the tightening effect of the upper sleeve 4 and the lower sleeve 7 on the wire.

[0037] Furthermore, the lower sleeve 7 is bulged upward in the middle, and can gradually come into contact with the lower surface of the middle part of the upper sleeve 4 during installation, and gradually press it, so that it can fit after installation in place; so that when the robot or drone is inspecting or repairing, it is convenient to judge the degree of tightening, tightening state and installation progress by taking pictures at a close distance, so as to ensure that it can be installed in place. The lower sleeve 7 is bulged upward in the middle, and there is a space between it and the lower plate 6, which is convenient for heat dissipation and can also promote lightweight.

[0038] The lower sleeve hole 71 is circular, passes through the lower sleeve 7 from top to bottom, is concentric with the rivet nut 3, and is larger than the diameter of the rivet section 35 on the rivet nut 3, so as to facilitate the passage of a screwing tool for fastening or assembly and disassembly operations. The lower sleeve ventilation hole 72 passes through the lower sleeve 7 from top to bottom, has the same structure as the upper plate ventilation hole 16 of the upper plate 1, and is located oppositely, so as to facilitate ventilation and heat dissipation, and can also pass through an operating tool for detection, fastening or assembly and disassembly operations.

[0039] The set screw 8 is a vertical cylindrical structure with an external thread on the side, a spherical cap-shaped upper end face at the upper end, and a screwing structure at the lower end; the spherical cap-shaped upper end face is in contact with the spherical cup-shaped upper concave on the top surface of the cavity 21 of the pressure block 2; the external thread cooperates with the internal thread of the rivet nut 3, and the screwing structure can cooperate with the screwing tool to drive the set screw 8 to rotate and move upward relative to the rivet nut 3, drive the pressure block 2 upward, and drive the pull plate 5 to be tensioned for tightening and installation; the set screw 8 can also be driven to reverse and move downward relative to the rivet nut 3, so that the pressure block 2 moves downward, and the pull plate 5 is released from the tensioned state for disassembly.

[0040] A detection method for tightening or replacing a parallel groove wire clamp, used for the parallel groove wire clamp of the present invention, comprises the following steps:

[0041] The first step is to measure and record the temperature of the parallel groove clamp. T 0; Use a T-shaped tool to sequentially pass through the pressing block ventilation hole 22 of the pressing block 2, the upper plate ventilation hole 16 of the upper plate 1, the upper sleeve ventilation hole 42 of the upper sleeve 4, the lower sleeve ventilation hole 72 of the lower sleeve 7 and the lower plate ventilation hole 65 of the lower plate 6 from above; or pass through the above ventilation holes in reverse order from below;

[0042] The second step is to rotate the T-shaped tool 90° and tighten it to clamp the pressing block 2 and the lower plate 6 to generate an axial clamping force. F j Designed to be installed in place after the set screw 8, the rated axial preload is F e ;

[0043] The third step is to continue tightening so that F j ≥ F e ×2, and keep F j ;

[0044] Step 4: Wait for 10 seconds, measure and record the temperature of the parallel groove clamp. T 1;

[0045] Step 5: If T 0− T 1≥10 。 C, the heating defect of the parallel groove wire clamp can be eliminated by tightening the set screw 8, and the parallel groove wire clamp should be tightened; otherwise, the parallel groove wire clamp needs to be replaced.

[0046] Supplementary explanation: (1) The pull plate 5 of the present invention is installed above the upper plate 1, hinged to the lower plate 6 at the left end, and hung to the lower plate 6 at the right end; the rivet nut 3 is riveted to the upper plate 1; the set screw 8 is screwed into the rivet nut 3, and when installed, it can rotate relatively and drive the pressure block 2 upward, so that the pull plate 5 obtains tension and is tightened. Therefore, the lower plate 6 is subjected to tensile force, which can reduce the mass, promote lightweight, and facilitate heat dissipation; the lower plate 6 reduces the mass, and under the tensile force, it is easy to produce adaptive deformation, which can automatically adapt to the relative position and overall shape of the wire, promote the upper plate 1 and the lower plate 6 to wrap tightly, drive the upper sleeve 4 and the lower sleeve 7 to wrap two parallel wires together, and enhance the wrapping effect.

[0047] (2) The pull plate 5 of the present invention is installed above the upper plate 1, and is attached to and pressed against the upper surfaces of the left and right sides of the upper plate 1, so that the upper plate 1 is subjected to compression. The upper plate 1 adopts a rigid structure and has a pit 12; the pit 12 presses the rivet nut 3 on the bottom surface to balance the axial reaction force of the rivet nut 3; and the rivet nut 3 is loosely matched with the rivet nut 3 on the side to accommodate and fix the rivet nut 3, so that the upper plate 1 can produce a slight bending deformation in the middle. The compression and slight bending deformation of the upper plate 1 cause the upper plate 1 to produce adaptive deformation, improve the adaptive ability of the upper plate 1 to the relative position and shape of the wire, promote the upper plate 1 and the lower plate 6 to wrap tightly, drive the upper sleeve 4 and the lower sleeve 7 to wrap two parallel wires together, and enhance the wrapping effect.

[0048] (3) The upper plate 1 and the lower plate 6 of the present invention both produce adaptive deformation and automatically adapt to the relative position and shape of the wire; the strength and hardness of the upper sleeve 4 and the lower sleeve 7 are both smaller than the wire, and under the tight wrapping effect of the upper plate 1 and the lower plate 6, they produce adaptive deformation and automatically adapt to the relative position and surface shape of the wire. Therefore, the present invention can improve the tightness of contact with the wire, increase the effective contact area, maintain the effective conductive area during operation, and avoid overheating.

[0049] (4) The pull plate 5 of the present invention is elastic and can automatically fit the upper right surface of the upper plate 1 on the right side. Therefore, the pull plate 5, the upper plate 1, the lower plate 6, the upper sleeve 4 and the lower sleeve 7 all produce adaptive deformation, can automatically adapt to the relative position of the wire, the overall shape of the contact part and the microscopic surface shape of the contact part, can increase the effective contact area, and make the wire bear a uniform tightening force at the contact part; therefore, the parallel groove wire clamp of the present invention can maintain sufficient gripping force (i.e. tightening force) on the wire, and can reduce the pressure (i.e. contact pressure per unit contact surface) and local pressure on the wire at the contact part; it can prevent the parallel groove wire clamp of the present invention from loosening or sliding relative to the wire, and can reduce the local pressure on the wire, and can reduce creep and stress relaxation.

[0050] (5) The pull plate 5 of the present invention is elastic and can compensate for the adaptive deformation of the upper plate 1, the lower plate 6, the upper sleeve 4 and the lower sleeve 7 and their tightening force on the wire, and can also compensate for creep and stress relaxation caused by changes in current, temperature, wind speed, corrosion, etc. Therefore, during operation, the parallel groove clamp of the present invention enables the wire to maintain a reliable connection and an effective conductive area.

[0051] The beneficial effects of the present invention are as follows: (1) The pull plate 5 of the present invention is elastic, located above the upper plate 1, hinged to the lower plate 6 at the left end, and hung to the lower plate 6 at the right end; the rivet nut 3 is riveted to the upper plate 1; the set screw 8 is screwed into the rivet nut 3, and when installed, it can rotate relative to drive the pressure block 2 upward, so that the pull plate 5 obtains tension and is tightened. Therefore, both the upper plate 1 and the lower plate 6 can produce adaptive deformation, automatically adapt to the relative position and shape of the wire, promote the tightening of the upper plate 1 and the lower plate 6, and enhance the tightening effect. The strength and hardness of the upper sleeve 4 and the lower sleeve 7 are both smaller than the wire. Under the tightening effect of the upper plate 1 and the lower plate 6, they produce adaptive deformation, automatically adapt to the relative position and surface shape of the wire, and jointly tighten the two parallel wires, thereby enhancing the tightening effect.

[0052] The existing bolt-type parallel groove wire clamp relies on bolts and nuts to fix the wire in the grooved clamp to complete the connection. The bolt transmits pressure through flat washers and spring washers to provide sufficient pressure for the wire. It obviously relies on the pressure along the axial direction of the bolt to clamp the wire through the clamp, so that the wire is subjected to unidirectional force and the local pressure is relatively large. It is easy to cause the cross-sectional shape of the wire to change and the strands of the wire surface to be scattered. It also makes the clamp and the wire prone to creep and stress relaxation, and the clamping effect is difficult to maintain. Therefore, compared with the existing bolt-type parallel groove wire clamp, the parallel groove wire clamp of the present invention generates a tightening force on the wire and tightens it, which can enhance and maintain the tightening effect. It enables the wire to obtain a uniform extrusion effect in multiple directions along the radial inward on the circumferential surface of the contact part, that is, a tightening effect, rather than a unidirectional clamping effect. The parallel groove wire clamp of the present invention can maintain sufficient gripping force (i.e., tightening force) on the wire, and can reduce the pressure and local pressure on the wire at the contact portion; it can prevent the parallel groove wire clamp of the present invention from loosening or slipping relative to the wire, and can reduce the local pressure on the wire, and can reduce the creep and stress relaxation of the parallel groove wire clamp of the present invention and the wire.

[0053] In addition, the pull plate 5 of the present invention is elastic and can automatically compensate for the adaptive deformation of the upper plate 1, the lower plate 6, the upper sleeve 4 and the lower sleeve 7 and their wrapping force on the wire, and can also compensate for creep and stress relaxation caused by changes in current, temperature, wind speed, corrosion, etc. Therefore, during operation, the parallel groove clamp of the present invention allows the wire to maintain a reliable connection and an effective conductive area.

[0054] (2) The parallel groove wire clamp of the present invention is screwed into the rivet nut 3 by the set screw 8, driving the pressure block 2 upward and tightening the pull plate 5. The set screw 8 can cooperate with the screwing tool through its screwing structure to drive the set screw 8 to rotate and move upward relative to the rivet nut 3, drive the pressure block 2 upward, drive the pull plate 5 to be tightened, and perform fastening and installation; it can also drive the set screw 8 to reverse and move downward relative to the rivet nut 3, so that the pressure block 2 moves downward, and the pull plate 5 is released from the tensioned state for disassembly.

[0055] The existing H-type parallel groove wire clamp is installed by using a special hydraulic tool, and the pressure on the wire is uniform and constant; the connection with the wire is hydraulically finalized at one time, so that part of the inner wall material of the wire clamp is embedded in the outer layer gap of the wire. Therefore, compared with the existing H-type parallel groove wire clamp, the parallel groove wire clamp of the present invention can be fastened and disassembled only by using a known screwing tool, making the fastening and disassembly operations more convenient and easy to fasten and replace during maintenance.

[0056] (3) The parallel groove wire clamp of the present invention makes the upper plate 1 and the lower plate 6 wrap tightly, and prompts the upper sleeve 4 and the lower sleeve 7 to wrap two parallel wires together, so that the wires maintain a reliable connection. The pull plate 5, the upper plate 1, the lower plate 6, the upper sleeve 4 and the lower sleeve 7 all produce adaptive deformation, which can automatically adapt to the relative position of the wires, the overall shape of the contact part and the microscopic surface shape of the contact part, and can increase the effective contact area; so that the wires are subjected to uniform wrapping force at the contact part, and the wrapping effect is enhanced.

[0057] During the construction of existing power transmission lines, in order to ensure operational reliability, multiple parallel groove wire clamps are often used to be connected at equal distances so that the conductors are in a parallel connection state. The existing wedge-shaped parallel groove wire clamp adopts a bow-shaped structure and a wedge block; during installation, the initial pressure is provided by a special bullet, and the amount of medicine is reasonably controlled to achieve the goal of controlling the pressure; due to the use of a wedge block, the conductors cannot be parallel to each other and cannot adapt to the relative position and shape of the conductors. Therefore, compared with the existing wedge-shaped parallel groove wire clamp, the parallel groove wire clamp of the present invention can wrap two parallel conductors tightly; it can automatically adapt to the relative position of the conductors, the overall shape of the contact part and the microscopic surface shape of the contact part, and can increase the effective contact area; the conductors are subjected to a uniform wrapping force at the contact part, thereby enhancing the wrapping effect. In addition, the parallel groove wire clamp of the present invention makes the tightening and disassembly operations more convenient than the existing wedge-shaped parallel groove wire clamp, and is convenient for tightening and replacement during maintenance.

[0058] (4) The upper plate 1 of the parallel groove clamp of the present invention has an elastic color-changing rubber ring on the side of the groove 13. The color-changing rubber ring is attached to and pressed against the pressing block 2, which has a color-changing temperature indication function, making it easy to observe by taking visible images to avoid overheating; it also has a sealing function to prevent the invasion of pollutants in the environment. The color-changing rubber ring is a closed annular structure, is elastic, and has a reversible color-changing temperature indication function. It is fixedly connected to the side of the groove 13 on the outer surface.

[0059] Therefore, compared with the existing parallel groove wire clamps, the parallel groove wire clamp of the present invention has a color-changing rubber ring, which is convenient for drones or robots to perform intelligent inspections on the top, and is convenient for observation by shooting visible images to avoid overheating. In addition, the pull plate 5 of the parallel groove wire clamp of the present invention is elastic and can automatically fit the upper surface of the right side of the upper plate 1 on the right side, so that the hanging hole 51 can automatically hang on the hook 61 of the lower plate 6 during installation, simplifying the operation control of the manipulator and improving the operation efficiency. The parallel groove wire clamp of the present invention does not need to be assembled during installation, and there is no separation of parts during disassembly, which can effectively prevent parts from accidentally falling and falling objects from high altitude, and improve the safety, reliability and convenience of robot detection, fastening and assembly and disassembly operations.

[0060] (5) In the parallel groove clamp described in the present invention, the pressing block 2 has a pressing block ventilation hole 22, the upper plate 1 has an upper plate ventilation hole 16, the upper sleeve 4 has an upper sleeve ventilation hole 42, the lower sleeve 7 has a lower sleeve ventilation hole 72, and the lower plate 6 has a lower plate ventilation hole 65; the pressing block ventilation holes 22, the upper plate ventilation holes 16, the upper sleeve ventilation holes 42, the lower sleeve ventilation holes 72 and the lower plate ventilation holes 65 have the same structure and are relatively located, which is convenient for ventilation and heat dissipation, and can also pass through operating tools for detection, tightening or assembly and disassembly operations, so that the operations are safe, reliable and convenient.

[0061] Therefore, compared with the existing parallel groove wire clamp, the parallel groove wire clamp described in the present invention is more convenient for ventilation and heat dissipation; it is also convenient for robots to use their manipulators to perform detection, tightening or assembly and disassembly operations; it is safe, reliable and convenient; and it can also reduce mass and promote its lightweight.

[0062] (6) The parallel groove wire clamp described in the present invention adopts a set screw 8; the set screw 8 has a spherical crown upper end surface at the upper end and a screwing structure at the lower end; the spherical crown upper end surface is abutted against the spherical segment-shaped upper concave on the top surface of the cavity 21 of the pressure block 2, so that the contact area between the pressure block 2 and the upper end surface of the set screw 8 can be increased, and the pressure block 2 can be plastically deformed on the upper concave surface to adapt to the shape of the upper end surface of the set screw 8, avoid relative rotation, and ensure reliable anti-loosening.

[0063] The existing bolt-type parallel groove wire clamp relies on bolts and nuts to fix the wire in the grooved clamp to complete the connection. The bolt transmits pressure through flat washers and spring washers to provide sufficient pressure for the wire. Its tightness is difficult to accurately control and detect. Its bolts are subjected to axial tension and are easy to loosen. In addition, the bolts, nuts and washers are all exposed to the outside and are susceptible to contamination and corrosion, which affects the fastening and replacement during maintenance.

[0064] Therefore, compared with the existing bolt-type parallel groove wire clamp, the parallel groove wire clamp of the present invention adopts a set screw 8, which can increase the contact area between the pressure block 2 and the upper end surface of the set screw 8, and cause the plastic deformation of the pressure block 2 on the upper concave surface, which can ensure reliable anti-loosening. The upward bulge in the middle of the lower sleeve 7 can gradually come into contact with the lower surface of the middle part of the upper sleeve 4 during the installation process, and gradually press it, and fit it after it is installed in place; so that robots or drones can easily judge the degree of tightening, tightening state and installation progress by taking images at a close distance during inspection or maintenance, and ensure that it can be installed in place. In addition, the pressure block 2 is attached and pressed against the groove 13 of the upper plate 1 on the side through the color-changing rubber ring, which can prevent pollutants in the environment from entering the matching gap between the rivet nut 3 and the set screw 8, and has a sealing effect to avoid affecting the tightening and assembly and disassembly of the set screw 8.

[0065] (7) The detection method for tightening or replacing the parallel groove clamp described in the present invention is used for the parallel groove clamp of the present invention. It can use a T-shaped tool to pass through the ventilation holes in sequence to measure and record the temperature of the parallel groove clamp; it can quantitatively determine whether the heating defect can be eliminated by tightening the set screw 8, and provides a method for quantitatively determining whether to tighten or replace the parallel groove clamp. Compared with the existing empirical judgment method, the detection method described in the present invention is convenient for robots to perform automated operations, and is more efficient, accurate and scientific. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the overall structure of the parallel groove wire clamp of the present invention;

[0067] Figure 2 for Figure 1 A partial top view of

[0068] Figure 3 For the rivet nut 3 Figure 1 A magnified view of the location;

[0069] Figure 4 For the upper sleeve 4 Figure 1 Top view of the location.

[0070] Explanation of the accompanying drawings: upper plate 1, rivet hole 11, pit 12, groove 13, upper plate hole 14, upper handle 15, upper plate ventilation hole 16, pressure block 2, cavity 21, pressure block ventilation hole 22, rivet nut 3, threaded hole 31, light hole 32, guide section 33, fixing section 34, upper rivet section 35, lower rivet section 36, upper sleeve 4, upper sleeve hole 41, upper sleeve ventilation hole 42, upper wire groove 43, pull plate 5, hanging hole 51, pry handle 52, lower plate 6, hook 61, right reinforcement rib 62, lower handle 63, lower plate hole 64, lower plate ventilation hole 65, left reinforcement rib 66, lower sleeve 7, lower sleeve hole 71, lower sleeve ventilation hole 72, lower wire groove 73 and set screw 8. DETAILED DESCRIPTION

[0071] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0072] Figure 1 Schematic diagram of the overall structure of the parallel groove clamp of the present invention. Figure 2 for Figure 1 A partial top view of the parallel groove wire clamp; the parallel groove wire clamp comprises an upper plate 1, a pressure block 2, a rivet nut 3, an upper sleeve 4, a pull plate 5, a lower plate 6, a lower sleeve 7 and a set screw 8. The upper plate 1 is a rigid curved plate placed horizontally in the longitudinal direction, with a pit 12, a groove 13, an upper plate hole 14, an upper handle 15 and an upper plate ventilation hole 16; the upper plate 1 and the above-mentioned structural features are preferably formed by forging an aluminum alloy profile. The rivet hole 11 of the upper plate 1 and the through hole of the upper handle 15 are preferably formed by cutting.

[0073] The groove 13 has an elastic color-changing rubber ring on the side, through which the pressing block 2 is attached and pressed. The color-changing rubber ring is a closed annular structure, is elastic, and has a reversible color-changing temperature-indicating function. It is preferably made of a well-known elastic temperature-sensitive color-changing silicone material and is formed by a well-known silicone forming process. The color-changing rubber ring is preferably fixedly connected to the side of the groove 13 by bonding with a well-known adhesive. The pressing block 2 is a flat strip-shaped block, which bulges upward on the upper surface and has a cavity 21 and a pressing block ventilation hole 22; the pressing block 2 and its above-mentioned structural features are preferably formed by die-casting of an aluminum alloy material.

[0074] Figure 3 For the rivet nut 3 Figure 1 The rivet nut 3 is a vertical cylindrical structure, with a threaded hole 31 at the upper part of the inner surface and a light hole 32 at the lower part of the inner surface; the rivet nut 3 has a guide section 33 at the upper part, a fixing section 34 in the middle part, and an upper rivet section 35 and a lower rivet section 36 at the lower part. The rivet nut 3 and its above-mentioned structural features are preferably made of medium carbon steel profiles through cold heading and tapping, and can also be formed by other manufacturing processes of existing rivet nuts. The upper rivet section 35 and the lower rivet section 36 have axial external teeth on the outer surface, which are preferably formed in an integrated manner during the cold heading process.

[0075] Figure 4 For the upper sleeve 4 Figure 1 The top view of the position. The upper sleeve 4 is a left-right symmetrical flat curved plate structure, with upper sleeve holes 41 on the front and rear sides of the middle part, upper sleeve ventilation holes 42 in the middle part, and upper wire grooves 43 on the left and right parts; the upper sleeve 4 and its above-mentioned structural features are preferably formed by stamping of well-known aluminum plate or copper plate profiles. When a copper-aluminum wire clamp is required, the upper sleeve 4 is preferably made of aluminum plate and copper plate profiles that are welded and then stamped. In order to ensure that the upper wire groove 43 of the upper sleeve 4 is reliably fitted on its outer surface with the semi-cylindrical surface of the upper plate 1, it is preferred that the outer surface of the upper wire groove 43 and the semi-cylindrical surface of the upper plate 1 are both rolled out with a longitudinal texture and bonded.

[0076] The pull plate 5 is a longitudinal strip-shaped curved plate with a pin hole at the left end, hanging holes 51 at the front and rear sides of the right end, and a pry handle 52 in the middle of the right end; the pry handle 52 has a through hole in the middle; the pull plate and its above-mentioned structural features are preferably made of stainless spring steel plate, which is made through cutting, bending and heat treatment.

[0077] The lower plate 6 is a curved plate-like structure placed vertically and flat, and is bent upward on the left and right sides, with a left outer curved surface, a right outer curved surface, a left inner curved surface and a right inner curved surface. The right outer curved surface is provided with a right reinforcing rib 62, and the upper end of the right reinforcing rib 62 is provided with a hook 61 facing downward; a lower handle 63 is provided on the right side of the lower surface; lower plate holes 64 are provided on both the front and rear sides of the middle of the lower surface, and a lower plate ventilation hole 65 is provided in the middle of the lower surface; a left reinforcing rib 66 is provided on the left outer curved surface; the lower plate 6 and the above-mentioned structural features are preferably formed by forging of aluminum alloy profiles. The pin hole provided on the upper end of the left reinforcing rib 66 of the lower plate 6 and the through hole provided in the middle of the lower handle 63 are preferably formed by cutting.

[0078] The lower sleeve 7 is a horizontally symmetrical curved plate structure, with lower sleeve holes 71 on both the front and rear sides of the middle part, lower sleeve ventilation holes 72 in the middle part, and lower wire grooves 73 on the left and right parts; the lower sleeve 7 and its above-mentioned structural features are preferably made of the same material and process as the upper sleeve 4. In addition, in order to ensure that the lower sleeve 7 is reliably fitted with the left inner curved surface and the right inner curved surface of the lower plate 6 on the outer surface through its lower wire groove 73, it is preferred that the outer surface of the lower wire groove 73 and the left inner curved surface and the right inner curved surface of the lower plate 6 are rolled out with longitudinal textures and bonded; the bonding is also used to fix the lower sleeve 7 to the lower plate 6.

[0079] The set screw 8 is a vertical cylindrical structure with an external thread on the side, a spherical upper end surface at the upper end, and a screwing structure at the lower end; the screwing structure is preferably a hexagonal socket or a slotted socket; the set screw 8 is preferably a medium carbon steel bar, and is made using a known set screw processing technology.

[0080] In addition, in order to ensure that the strength and hardness of the upper sleeve 4 and the lower sleeve 7 are both lower than the conductor, the upper sleeve 4 and the lower sleeve 7 are preferably made of pure aluminum or pure copper plates. In order to ensure that the pressing block 2 can cause plastic deformation on the upper concave surface when the upper concave at the center of the top surface of the cavity 21 of the pressing block 2 abuts against the upper end surface of the set screw 8, the hardness of the set screw 8 is preferably higher than that of the pressing block 2; therefore, the pressing block 2 is preferably made of aluminum alloy material through die casting; the set screw 8 is preferably made of medium carbon steel bar material, and is made using a known set screw processing technology.

[0081] The T-shaped tool is used to sequentially pass through the pressing block vent hole 22 of the pressing block 2, the upper plate vent hole 16 of the upper plate 1, the upper sleeve vent hole 42 of the upper sleeve 4, the lower sleeve vent hole 72 of the lower sleeve 7, and the lower plate vent hole 65 of the lower plate 6; rotate 90°, and tighten to clamp the pressing block 2 and the lower plate 6. Therefore, it is preferred to design the T-shaped tool with an operating rod on the body; the operating rod can be axially retracted and laterally rotated relative to the body, and has a T-shaped end; the operating rod can sequentially pass through the pressing block vent hole 22, the upper plate vent hole 16, the upper sleeve vent hole 42, the lower sleeve vent hole 72, and the lower plate vent hole 65. Since the block vent holes 22, upper plate vent holes 16, upper sleeve vent holes 42, lower sleeve vent holes 72 and lower plate vent holes 65 are all of the same shape, rectangular in cross section and relatively located, after rotating 90°, the T-shaped end of the operating rod can be stuck and cannot be retracted; therefore, the block 2 and the lower plate 6 can be clamped. The T-shaped tool and the above structure are preferably made of chrome vanadium steel or carbon steel profiles and formed by forging.

[0082] The above implementation is only a preferred embodiment of the present invention and does not constitute a limitation of the present invention. Under the condition of meeting the structural and performance requirements of the present invention, changes in materials and manufacturing processes are all within the protection scope of the present invention.

Claims

1. A power transmission line paralleling clamp that is convenient for robot maintenance, characterized by: It comprises an upper plate (1), a pressure block (2), a rivet nut (3), an upper sleeve (4), a pull plate (5), a lower plate (6), a lower sleeve (7) and a set screw (8); The set screw (8) is screwed into the rivet nut (3), driving the pressure block (2) upward, thereby tightening the pull plate (5) and preventing it from loosening reliably; thereby making the upper plate (1) and the lower plate (6) tightly wrapped, and causing the upper sleeve (4) and the lower sleeve (7) to jointly tighten the two parallel wires, so that the wires remain reliably connected; The pulling plate (5) is installed above the upper plate (1), is hinged to the lower plate (6) at the left end, is hung to the lower plate (6) at the right end, and is pressed against the pressing block (2) on the lower surface to obtain tension and be tightened, so that the upper plate (1) and the lower plate (6) obtain a tightening force and are tightened; The upper plate (1) adopts a rigid structure and is able to withstand compression; The lower plate (6) is subjected to tensile forces, has a structural strength lower than that of the upper plate (1), and can produce adaptive deformation, automatically adapt to the relative position and shape of the wire, enhance the tightening effect, and ensure that the relative position of the wire is not affected during the assembly and disassembly process, thereby facilitating replacement; The upper sleeve (4) and the lower sleeve (7) have a strength and hardness that are smaller than the conductor, and can automatically adapt to the relative position and surface shape of the conductor under the tightening effect, produce adaptive deformation, increase the contact area, maintain an effective conductive area during operation, and avoid overheating; The upper plate (1) accommodates the pressing block (2), and the lower sleeve (7) is fixed to the lower plate (6); no parts assembly is performed during installation, which can avoid falling objects from high altitudes, thereby improving the safety, reliability and convenience of robot detection, fastening and assembly and disassembly operations; The pull plate (5) is elastic, so that the pull plate (5) can automatically hang on the lower plate (6) during installation, thereby simplifying the operation control of the manipulator and improving the operation efficiency; The pull plate (5) is elastic and can compensate for adaptive deformation and tightening force, and can also compensate for creep and stress relaxation.

2. A power transmission line paralleling clamp for robot maintenance according to claim 1, characterized in that: The pressing block (2) has pressing block ventilation holes (22), the upper plate (1) has upper plate ventilation holes (16), the upper sleeve (4) has upper sleeve ventilation holes (42), the lower sleeve (7) has lower sleeve ventilation holes (72), and the lower plate (6) has lower plate ventilation holes (65); The pressing block ventilation holes (22), the upper plate ventilation holes (16), the upper sleeve ventilation holes (42), the lower sleeve ventilation holes (72) and the lower plate ventilation holes (65) are all of the same shape and are positioned relative to each other, thus facilitating ventilation and heat dissipation and promoting lightweighting; The pressing block ventilation holes (22), the upper plate ventilation holes (16), the upper sleeve ventilation holes (42), the lower sleeve ventilation holes (72) and the lower plate ventilation holes (65) can be penetrated by operating tools to perform detection, tightening or assembly and disassembly operations, making the operations safe, reliable and convenient.

3. A power transmission line paralleling clamp for robot maintenance according to claim 1, characterized in that: The upper plate (1) is a rigid curved plate, with a groove (13) on the upper surface, a pit (12) on the bottom surface of the groove (13), and an upper plate hole (14) on the bottom surface of the pit (12); The upper plate (1) passes through the upper plate hole (14) and passes through the rivet nut (3) and is riveted together with the rivet nut; The upper plate (1) is pressed and accommodates the rivet nut (3) through the recess (12); The upper plate (1) accommodates the pressing block (2) via the groove (13); The upper plate (1) has a semi-cylindrical surface on the lower surface, and the semi-cylindrical surface is attached to and pressed against the upper sleeve (4), so that the upper sleeve (4) and the lower sleeve (7) are driven to wrap the wire tightly together; The groove (13) is provided with a color-changing rubber ring, which is attached to and pressed against the pressing block (2) by the color-changing rubber ring, and has a color-changing temperature indication function, which facilitates observation by taking visible images, avoids overheating, and also has a sealing function.

4. A power transmission line paralleling clamp for robot maintenance according to claim 3, characterized in that: The pressing block (2) is in the shape of a strip block, and is attached to and pressed against the pulling plate (5) on its upper surface, thereby driving the pulling plate (5) to be tensioned; The pressing block (2) has a cavity (21) on the lower surface, and the upper part of the rivet nut (3) is accommodated by the cavity (21), and is clearance-matched with the rivet nut (3), thus having a guiding function; The pressing block (2) has an upper concave at the center of the top surface of the cavity (21), and the upper concave abuts against the upper end surface of the fixing screw (8), thereby increasing the contact area between the pressing block (2) and the fixing screw (8) and causing plastic deformation of the surface of the upper concave, thereby ensuring reliable anti-loosening.

5. A power transmission line paralleling clamp for robot maintenance according to claim 4, characterized in that: The rivet nut (3) is a vertical cylindrical structure, with a threaded hole (31) at the upper part of the inner surface and a smooth hole (32) at the lower part of the inner surface; The threaded hole (31) cooperates with the set screw (8) so that the set screw (8) can rotate and move axially to drive the pressing block (2) to tighten or assemble or disassemble; The rivet nut (3) has a guide section (33) at the top, a fixing section (34) at the middle, and an upper rivet section (35) and a lower rivet section (36) at the bottom. The rivet nut (3) is clearance-matched with the side surface of the cavity (21) through the guide section (33); The rivet nut (3) is clearance-matched with the side surface of the recess (12) through the fixing section (34); The self-clinching nut (3) is press-riveted together with the upper plate hole (14) through the upper self-clinching section (35), so that the self-clinching nut (3) is fixed to the upper plate (1); The rivet nut (3) is riveted together with the upper sleeve (4) through the lower rivet section (36), so that the upper sleeve (4) is fixed to the upper plate (1); The self-clinching nut (3) has a circular step surface at the lower end of the fixing section (34), and the step surface abuts against the bottom surface of the pit (12), so that the self-clinching nut (3) obtains axial positioning and support.

6. A power transmission line paralleling clamp for robot maintenance according to claim 1, characterized in that: The upper sleeve (4) is a curved plate structure, with an upper sleeve hole (41) in the middle, and upper wire grooves (43) on the left and right sides; The upper sleeve (4) is attached to and pressed against the wire through the upper wire groove (43), thereby achieving reliable connection of the wire; The upper sleeve (4) is attached to and pressed against the upper plate (1) through the upper wire groove (43) to obtain a tightening force; The upper sleeve hole (41) passes through the rivet nut (3) and is riveted together with the rivet nut (3), so that the upper sleeve (4) is fixed to the upper plate (1).

7. A power transmission line paralleling clamp for robot maintenance according to claim 1, characterized in that: The pull plate (5) is a strip-shaped curved plate, which is attached to and pressed against the left and right sides of the upper plate (1); The pull plate (5) is riveted to the upper plate (1); The pull plate (5) has a pin hole at the left end to form a hinge, and is hinged to the lower plate (6) via the hinge; The pulling plate (5) is pressed tightly against the pressing block (2) in the middle, and can be tensioned due to the upward movement of the pressing block (2); The pull plate (5) has a hanging hole (51) at the right end, and is hung on the lower plate (6) through the hanging hole (51), so that the upper plate (1) and the lower plate (6) can obtain a tightening force and tighten due to tension; The pull plate (5) is provided with a pry handle (52) at the right end, and the pull plate (5) can be pried and pressed by the pry handle (52) to detach from the hook, thereby facilitating the disassembly operation.

8. A power transmission line paralleling clamp for robot maintenance according to claim 7, characterized in that: The lower plate (6) is a curved plate-like structure, which is bent upward on the left and right sides, and has a left outer curved surface, a right outer curved surface, a left inner curved surface, and a right inner curved surface. The right outer curved surface has a right reinforcing rib (62), and the upper end of the right reinforcing rib (62) has a hook (61); The lower plate (6) is hung in the hanging hole (51) via the hook (61), so that the lower plate (6) is hung on the pull plate (5) at the right end; The hook (61) is formed into a downward curved hook, which facilitates the hooking operation and ensures reliable hooking; The lower plate (6) has a lower plate hole (64); the lower plate hole (64) is circular and concentric with the rivet nut (3), so as to facilitate the insertion of a screwing tool for tightening or assembly and disassembly operations; The lower plate (6) has a left reinforcing rib (66) on the left outer curved surface, and a pin hole is provided at the upper end of the left reinforcing rib (66) to form a hinge, which is hinged to the pull plate (5) to ensure reliable hinge connection; The lower plate (6) is in contact with and pressed against the lower sleeve (7) at both the left inner curved surface and the right inner curved surface to obtain a tightening force, so that the upper sleeve (4) and the lower sleeve (7) can tighten the wire together.

9. A power transmission line paralleling clamp for robot maintenance according to claim 1, characterized in that: The lower sleeve (7) is a curved plate structure, which is opposite to the upper sleeve (4) in vertical direction, has a lower sleeve hole (71) in the middle, and has lower wire grooves (73) in the left and right parts; The lower sleeve (7) is attached to and pressed against the wire through the lower wire groove (73), and is attached to and pressed against the lower plate (6) through the lower wire groove (73), thereby obtaining a tightening force, so that the upper sleeve (4) and the lower sleeve (7) can tighten the wire together, and the lower sleeve (7) can be fixed to the lower plate (6); The lower sleeve (7) bulges upwards in the middle between the left and right lower wire grooves (73); the bulge abuts against the upper sleeve (4), is pressed and fitted, and can balance the axial force of the rivet nut (3), thereby enhancing the tightening effect.

10. A detection method for tightening or replacing a parallel groove clamp, used for the parallel groove clamp according to claims 1-9, characterized in that: The following steps are involved: The first step is to measure and record the temperature of the parallel groove clamp. T 0; Using a tool, sequentially pass through the pressing block ventilation hole (22) of the pressing block (2), the upper plate ventilation hole (16) of the upper plate (1), the upper sleeve ventilation hole (42) of the upper sleeve (4), the lower sleeve ventilation hole (72) of the lower sleeve (7), and the lower plate ventilation hole (65) of the lower plate (6); The second step is to clamp the pressing block (2) and the lower plate (6) to generate an axial clamping force. F j ; The rated preload force of the set screw (8) is F e ; The third step is to make F j ≥ F e ×2, and keep F j ; Step 4: Measure and record the temperature of the parallel groove clamp. T 1; Step 5: If T 0─ T 1≥10℃, tighten the parallel groove clamp; otherwise, replace the parallel groove clamp.

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