Device and method for detecting tensile strength of insulator

Abstract

The invention belongs to the technical field of insulator performance detection, particularly relates to an insulator tensile strength detection device and method, and aims to solve the problem that the detection precision is affected due to the fact that an existing insulator tensile strength detection device cannot effectively solve the problem that the connection line between the stress axis of an insulator and a fixed point has deviation. The two fixing plates are located above the mounting table, cutting holes are formed in the two fixing plates, and stabilizing columns are fixedly connected into the cutting holes; and the two tension sensors are both located between the two stable columns. According to the insulator tensile strength detection device and method disclosed by the invention, the stress point of the insulator can be adjusted when the detection precision is influenced due to the fact that the fixed point of the insulator and the device and the stress axis of the insulator are inconsistent in the tensile strength mild detection process of the insulator; therefore, the stress axis of the insulator coincides with the connecting line of the fixed points, errors are avoided, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of insulator performance detection, and particularly relates to an insulator tensile strength detection device and method. Background Art

[0002] An insulator is a special insulating control component installed between conductors at different potentials or between a conductor and a grounding member. There are mainly porcelain insulators, glass insulators, and composite insulators; the mechanical properties of insulators play an important role in the power system and directly affect the safety of the power system.

[0003] In the existing insulator tensile strength detection device, the position where the tensile force is applied to the insulator is often fixed. When the axis of the insulator is inconsistent with the connection line of the fixed points of the detection device, the insulator will tilt, resulting in an overestimated tensile force applied by the device, thereby affecting the detection accuracy of the tensile strength of the insulator. Summary of the Invention

[0004] The present invention discloses an insulator tensile strength detection device and method, aiming to solve the technical problem in the background art that the existing insulator tensile strength detection device cannot effectively solve the problem that the detection accuracy is affected due to the deviation between the force axis of the insulator and the connection line of the fixed points.

[0005] An insulator tensile strength detection device proposed by the present invention includes a mounting table; Two fixing plates, both of the two fixing plates are located above the mounting table, cutting holes are formed on both of the two fixing plates, and stabilizing columns are fixedly connected in the cutting holes; Two tension sensors, both of the two tension sensors are located between the two stabilizing columns, connecting members are fixedly connected to the opposite sides of the two tension sensors, and connecting members are movably connected to both of the two U-shaped frames; Two tension synchronization modules, both of the two tension synchronization modules are located between the two fixing plates and above the mounting table, and the tension synchronization modules are used to adjust the fixed position of the insulator and the device and the direction of the insulator tensile force to the same axis.

[0006] In a preferred embodiment, the two tensile force synchronization modules include two symmetric supporting plates, and the sides of the supporting plates opposite to the stable columns on the same side are fixedly connected. An annular plate is arranged between the two supporting plates, and a plurality of connecting rods evenly distributed at equal intervals in the circumferential direction are fixedly connected between the annular plate and the supporting plate on the same side. Moreover, annular frames are fixedly connected to the sides of the annular plates close to the supporting plates. Series rods are arranged on the annular plates. Switching modules are arranged on the two U-shaped frames; Three rivets evenly distributed at equal intervals in the circumferential direction are fixedly connected to the outsides of the two annular frames. The outsides of the rivets are movably connected with supporting forks, and the three supporting forks on the same side are located on different planes. The inner walls of the supporting forks are slidably connected to the outsides of the series rods on the same side. A limiting block is fixedly connected to the side of the series rod close to the supporting plate, and the limiting block is attached to the outside of the outermost supporting fork; Annular guide rails are fixedly connected to the sides of the two annular plates far from the supporting plates. Moving platforms are slidably connected to the outsides of the annular guide rails. Motors I are fixedly connected to the outsides of the moving platforms. The output ends of the motors I are connected to gears I through couplings. Moreover, toothed rings are fixedly connected to the outsides of the annular guide rails, and the toothed rings are engaged with the gears I on the same side. Extension plates are fixedly connected to the outsides of the moving platforms. Notches are formed in the extension plates, and annular members are slidably connected in the notches. The inner walls of the annular members are fixedly connected to the outsides of the series rods on the same side; The outsides of the two moving platforms are movably connected with force arms I. One ends of the force arms I are fixedly connected with round rods. The outsides of the round rods are movably connected with force arms II. Moreover, the ends of the force arms II far from the round rods are movably connected to the outsides of the annular members on the same side. Torsion springs are wound around the outsides of the round rods. One ends of the torsion springs are fixedly connected to the outsides of the force arms I, and the other ends are fixedly connected to the outsides of the force arms II. Convex seats are fixedly connected to the outsides of the moving platforms. Winding rollers are movably connected to the convex seats. Motors II are fixedly connected to the outsides of the convex seats. The output ends of the motors II are connected to one sides of the winding rollers on the same side through couplings. Steel wire ropes are fixedly connected to the outsides of the winding rollers. The ends of the steel wire ropes far from the winding rollers are fixedly connected to the outsides of the annular members on the same side.

[0007] In a preferred embodiment, the switching module includes three different fixing members, and the fixing members are all fixedly connected to the outside of the connecting member on the same side. Rotating seats are fixedly connected to one sides of the two connecting members. Annular frames are arranged on the outsides of the rotating seats. The annular frames are fixedly connected to the sides opposite to the U-shaped frames on the same side. Moreover, three arc-shaped spring pieces evenly distributed at equal intervals in the circumferential direction are fixedly connected to one inner wall of the annular frame; Supporting plates are fixedly connected to the outsides of the two rotating seats. The supporting plates are all located inside the annular frames. Moreover, convex blocks are fixedly connected to the sides of the supporting plates close to the arc-shaped spring pieces. The convex blocks are all located between the two arc-shaped spring pieces on the same side. A tensioning and adaptation module is arranged on the mounting table.

[0008] In a preferred embodiment, the tensioning and adapting module includes a bidirectional lead screw. Two symmetric circular holes are provided on the mounting table. The inner walls of the two circular holes are movably connected to the outside of the bidirectional lead screw. A second gear is fixedly connected to the outside of the bidirectional lead screw. A third motor is fixedly connected to the top inner wall of the mounting table. The output end of the third motor is connected to a fourth gear through a coupling. The fourth gear meshes with the second gear. Two symmetric moving frames are arranged on the outside of the bidirectional lead screw. Two symmetric rectangular grooves are provided on the mounting table. The inner walls of the rectangular grooves are slidably connected to the outside of the same-side moving frames. Chute are provided on the upper sides of the two moving frames. The inner walls of the chutes are slidably connected to the outside of the same-side fixing plates. Hydraulic rods are fixedly connected to the outside of the moving frames. The output ends of the hydraulic rods are fixedly connected to the outside of the same-side fixing plates.

[0009] A method for detecting the tensile strength of an insulator, using the insulator tensile strength detection device as described above, includes the following steps: Step 1: According to the length of the insulator to be tested, adjust through the tensioning and adapting module so that the two U-shaped frames move to both ends of the insulator. Step 2: According to the fixing type of the insulator to be tested, use the switching module to fix both ends of the insulator on the device. Step 3: Pre-tension the insulator, observe whether the values of the two tension sensors are the same. If there is a difference, use the tension synchronization module to adjust so that the fixing position of the insulator coincides with the stress axis of the insulator. After coincidence, perform formal tensioning. After testing, record the data.

[0010] As can be seen from the above, the insulator tensile strength detection device provided by the present invention can adjust the stress point of the insulator during the tensile strength detection process of the insulator when the fixed point of the insulator and the device and the stress axis of the insulator are inconsistent, resulting in the detection accuracy being affected, so that the stress axis of the insulator coincides with the connection line of the fixed points, avoiding errors and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of an insulator tensile strength detection device proposed by the present invention; Figure 2 is a schematic cross-sectional structure diagram of an insulator tensile strength detection device proposed by the present invention; Figure 3 is a schematic diagram of the tension synchronization module structure of an insulator tensile strength detection device proposed by the present invention; Figure 4 is a schematic diagram of the ring frame structure of an insulator tensile strength detection device proposed by the present invention; Figure 5 is a schematic diagram of the movable table structure of an insulator tensile strength detection device proposed by the present invention; Figure 6 This is a schematic diagram of the winding roller structure of an insulator tensile strength testing device proposed by the present invention; Figure 7 For the present invention Figure 6 A magnified view of point A in the figure; Figure 8 This is a schematic structural diagram of a switching module of an insulator tensile strength detection device proposed by the present invention; Figure 9 This is a structural schematic diagram of the tensioning and adaptation module of an insulator tensile strength detection device proposed by the present invention.

[0012] In the figure: 1. Mounting table; 2. Fixing plate; 3. Stabilizing column; 4. U-shaped frame; 5. Connecting piece; 6. Tension sensor; 7. Tension synchronization module; 701. Support plate; 702. Annular plate; 703. Connecting rod; 704. Series rod; 705. Annular frame; 706. Rivet; 707. Support fork; 708. Limit block; 709. Annular guide rail; 710. Movable table; 711. Gear ring; 712. Motor 1; 713. Gear 1; 714. Extension plate; 715. Annular piece ;716, force arm one; 717, force arm two; 718, torsion spring; 719, winding roller; 720, motor two; 721, wire rope; 8, switching module; 801, fixing piece; 802, rotating seat; 803, ring frame; 804, arc-shaped spring leaf; 805, support plate; 806, bump; 9, tensioning and adaptation module; 901, bidirectional screw rod; 902, gear two; 903, motor three; 904, gear four; 905, movable frame; 906, rectangular slot; 907, hydraulic rod. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] The insulator tensile strength detection device disclosed in the present invention is mainly used in scenarios where the existing insulator tensile strength detection device cannot effectively solve the problem of deviation between the insulator force axis and the fixed point connection line, which affects the detection accuracy.

[0015] Reference Figures 1-9 , an insulator tensile strength testing device, comprising a mounting platform 1; Two fixing plates 2, both of which are located above the mounting platform 1, each of which has a cutout hole, and each of which is connected to a stabilizing column 3 by bolts; Two tension sensors 6, both of the two tension sensors 6 are located between the two stabilizing columns 3, and a connecting member 5 is bolted to the opposite side of each of the two tension sensors 6, and a connecting member 5 is rotatably connected to each of the two U-shaped frames 4 through bearings; Two tension synchronization modules 7, both of the two tension synchronization modules 7 are located between the two fixing plates 2, and the tension synchronization modules 7 are both located above the mounting table 1. The tension synchronization modules 7 are used to adjust the fixing position of the insulator and the device and the tension direction of the insulator to the same axis.

[0016] Specifically, when the device uses the tension synchronization module 7, during the tensile strength detection of the insulator, if the fixing point of the insulator and the device and the force axis of the insulator are inconsistent, which affects the detection accuracy, the force point of the insulator can be adjusted, so that the force axis of the insulator coincides with the connection line of the fixing points, avoiding errors and improving the detection accuracy.

[0017] Refer to Figure 3 、 Figure 4 、 Figures 5-7, in a preferred embodiment, the two tension synchronization modules 7 include two symmetric supporting plates 701. The sides of the supporting plates 701 opposite to the stable columns 3 on the same side are both connected by bolts. An annular plate 702 is arranged between the two supporting plates 701. A plurality of connecting rods 703 evenly distributed at equal circumferential intervals are connected between the annular plate 702 and the supporting plates 701 on the same side by bolts. And annular frames 705 are connected to the sides of the annular plate 702 close to the supporting plates 701 by bolts. Series rods 704 are arranged on the annular plates 702. Switching modules 8 are arranged on the two U-shaped frames 4; Three rivets 706 evenly distributed at equal circumferential intervals are connected to the outsides of the two annular frames 705 by bolts. The outsides of the rivets 706 are all rotatably connected to supporting forks 707 through bearings. And the three supporting forks 707 on the same side are located on different planes. The inner walls of the supporting forks 707 are all slidably connected to the outsides of the series rods 704 on the same side. A limiting block 708 is connected to the side of the series rod 704 close to the supporting plate 701 by bolts. The limiting block 708 is in contact with the outside of the outermost supporting fork 707; Annular guide rails 709 are connected to the sides of the two annular plates 702 far from the supporting plates 701 by bolts. Moving platforms 710 are slidably connected to the outsides of the annular guide rails 709. Motors 712 are connected to the outsides of the moving platforms 710 by bolts. The output ends of the motors 712 are all connected to first gears 713 through couplings. And toothed rings 711 are connected to the outsides of the annular guide rails 709 by bolts. The toothed rings 711 are meshed with the first gears 713 on the same side. Extension plates 714 are connected to the outsides of the moving platforms 710 by bolts. Notches are formed in the extension plates 714. Ring-shaped parts 715 are slidably connected in the notches. The inner walls of the ring-shaped parts 715 are all connected to the outsides of the series rods 704 on the same side by bolts; The outsides of the two moving platforms 710 are all rotatably connected to first force arms 716 through bearings. One ends of the first force arms 716 are all connected to round rods by bolts. Second force arms 717 are rotatably connected to the outsides of the round rods through bearings. And the ends of the second force arms 717 far from the round rods are all rotatably connected to the outsides of the ring-shaped parts 715 on the same side through bearings. Torsion springs 718 are wound around the outsides of the round rods. One ends of the torsion springs 718 are all connected to the outsides of the first force arms 716 by bolts. The other ends are all connected to the outsides of the second force arms 717 by bolts. Convex seats are connected to the outsides of the moving platforms 710 by bolts. Winding rollers 719 are rotatably connected to the convex seats through bearings. Motors 720 are connected to the outsides of the convex seats by bolts. The output ends of the motors 720 are all connected to one sides of the winding rollers 719 on the same side through couplings. Steel wire ropes 721 are connected to the outsides of the winding rollers 719 by bolts. One ends of the steel wire ropes 721 far from the winding rollers 719 are connected to the outsides of the ring-shaped parts 715 on the same side by bolts.

[0018] Specifically, when the fixing point of the insulator and the device is inconsistent with the stress axis of the insulator, the first motor 712 is started. The first motor 712 drives the movable table 710 to rotate on the annular guide rail 709, so that the extension plate 714 moves circularly on the annular guide rail 709. The second motor 720 is started, and the second motor 720 winds or releases the steel wire rope 721, so that the annular member 715 overcomes the torsion of the torsion spring 718 and moves on the extension plate 714, enabling the series rod 704 on the annular member 715 to change its position within a certain orientation. The connecting member 5 on the U-shaped frame 4 connected to the series rod 704 can drive one end of the insulator to move to a certain extent. The three supporting forks 707 limit the horizontal movement direction of the series rod 704, so that the series rod 704 can only move in a direction parallel to the annular plate 702.

[0019] In a specific application scenario, the tension synchronization module 7 is mainly applicable to the tension synchronization link during the tension synchronization process. That is, the tension synchronization module 7 can enable the series rod 704 connected to the insulator to move quickly and conveniently on the annular plate 702 by using the annular member 715, the extension plate 714 and the movable table 710, thus greatly reducing the time for correction and adjustment and improving the detection efficiency. By using the supporting forks 707 and the limiting blocks 708, when the series rod 704 is pushed by the annular member 715 and moves, the series rod 704 itself can always be kept perpendicular to the annular plate 702, thereby reducing the influence of the device on the detection accuracy.

[0020] Refer to Figure 8 , in a preferred embodiment, the switching module 8 includes three different fixing members 801. The fixing members 801 are all connected to the outside of the connecting member 5 on the same side by bolts. One side of each of the two connecting members 5 is connected to a rotating seat 802 by bolts. An annular frame 803 is provided outside each of the rotating seats 802. The annular frame 803 is connected to the opposite side of the U-shaped frame 4 on the same side by bolts. Three arc-shaped spring pieces 804 evenly distributed circumferentially are connected to the inner wall of one side of the annular frame 803 by bolts; A support plate 805 is connected to the outside of each of the two rotating seats 802 by bolts. The support plates 805 are all located within the annular frame 803. A convex block 806 is connected to the side of each support plate 805 close to the arc-shaped spring piece 804 by bolts. The convex blocks 806 are all located between the two arc-shaped spring pieces 804 on the same side. A tensioning and adaptation module 9 is provided on the mounting table 1.

[0021] Specifically, when it is necessary to connect insulators of multiple different connection types, rotate the rotating seat 802. The rotating seat 802 drives the connecting member 5 to rotate, and switches the fixing member 801 on the connecting member 5. During this process, the following convex block 806 will overcome the resistance of the arc-shaped spring piece 804 and move in the gap between two adjacent arc-shaped spring pieces 804. Thus, after the switching of the fixing member 801 is completed, the convex block 806 can stay in the gap, making the connecting member 5 stop rotating.

[0022] In a specific application scenario, the switching module 8 is mainly applicable to the switching link during the switching process, that is, the switching module 8 can achieve rapid and stable switching of the fixing part 801 by using the bumps 806 and the arc-shaped reed 804, so that the fixing part 801 remains in this position after switching, greatly reducing the operation difficulty of personnel and simplifying the switching process.

[0023] Refer to Figure 9 , in a preferred embodiment, the tensioning and adapting module 9 includes a bidirectional lead screw 901. Two symmetric circular holes are formed on the mounting table 1. The inner walls of the two circular holes and the outside of the bidirectional lead screw 901 are rotatably connected through bearings, and a second gear 902 is connected to the outside of the bidirectional lead screw 901 through bolts. A third motor 903 is connected to the top inner wall of the mounting table 1 through bolts. The output end of the third motor 903 is connected to a fourth gear 904 through a coupling, and the fourth gear 904 meshes with the second gear 902; two symmetric moving frames 905 are arranged on the outside of the bidirectional lead screw 901. Two symmetric rectangular grooves 906 are formed on the mounting table 1. The inner walls of the rectangular grooves 906 are slidably connected to the outside of the moving frames 905 on the same side, and chutes are formed on the upper sides of the two moving frames 905. The inner walls of the chutes are slidably connected to the outside of the fixing plate 2 on the same side. Hydraulic rods 907 are connected to the outside of the moving frames 905 through bolts, and the output ends of the hydraulic rods 907 are connected to the outside of the fixing plate 2 on the same side through bolts.

[0024] Specifically, according to the length of the insulator to be measured, the third motor 903 is started, the annular frame 803 drives the bidirectional lead screw 901 to rotate, so that the moving frames 905 on the bidirectional lead screw 901 can move on the rectangular grooves 906, and the distance between the moving frames 905 is adapted to the length of the insulator. The hydraulic rods 907 are started, and the collecting moving frames 905 can push the tensile force synchronization module 7 to move up and down on the moving frames 905, so as to adapt to the volume of the insulator. When the insulator is fixed on the device and the tensile strength detection starts, the third motor 903 is started again, so that the two moving frames 905 move away from each other, so as to apply a tensile force to the insulator. After the insulator is broken, the data detected by the tensile force sensor 6 is recorded.

[0025] In a specific application scenario, the tensioning and adapting module 9 is mainly applicable to the tensioning and adapting link during the tensioning and adapting process, that is, the tensioning and adapting module 9 can make the device be appropriately adjusted according to the different lengths and volumes of the insulators by using the bidirectional lead screw 901 and the moving frames 905, so that the device is adapted to the insulator, thereby improving the applicability of the device. At the same time, the bidirectional lead screw 901 can provide a stable tensile force for the device during tensioning, improving the detection efficiency and accuracy.

[0026] A method for detecting the tensile strength of an insulator, using an insulator tensile strength detection device as described above, includes the following steps: Step 1: According to the length of the insulator to be tested, adjust through the tensioning and adaptation module 9 so that the two U-shaped frames 4 move to both ends of the insulator (according to the length of the insulator to be tested, start the third motor 903, the annular frame 803 drives the bidirectional lead screw 901 to rotate, so that the moving frame 905 on the bidirectional lead screw 901 can move on the rectangular groove 906, so that the distance between the moving frames 905 adapts to the length of the insulator, start the hydraulic rod 907, and the moving frame 905 can push the tension synchronization module 7 to move up and down on the moving frame 905, so as to adapt to the volume of the insulator. When the insulator is fixed on the device and the tensile strength detection starts, start the third motor 903 again, so that the two moving frames 905 move away from each other, so as to apply a tensile force to the insulator. After the insulator is broken, record the data detected by the tensile force sensor 6); Step 2: According to the fixing type of the insulator to be tested, use the switching module 8 to fix both ends of the insulator on the device (when it is necessary to connect insulators of multiple different connection types, rotate the rotating seat 802, the rotating seat 802 drives the connecting piece 5 to rotate, and switch the fixing piece 801 on the connecting piece 5. During this process, the follower convex block 806 will overcome the resistance of the arc-shaped spring piece 804 and move in the gap between two adjacent arc-shaped spring pieces 804, so that after the fixing piece 801 is switched, the convex block 806 can stay in the gap and the connecting piece 5 will no longer rotate); Step 3: Pre-tension the insulator, observe whether the values of the two tensile force sensors 6 are the same. If there is a difference, use the tensile force synchronization module 7 to adjust so that the fixing position of the insulator coincides with the stress axis of the insulator. After coincidence, perform formal tensioning. After the test, record the data (when the fixing point of the insulator and the device and the stress axis of the insulator are inconsistent, start the first motor 712, the first motor 712 drives the movable table 710 to rotate on the annular guide rail 709, so that the extension plate 714 moves circularly on the annular guide rail 709. Start the second motor 720, and the second motor 720 winds or releases the steel wire rope 721, so that the annular member 715 overcomes the torsion of the torsion spring 718 and moves on the extension plate 714, so that the series rod 704 on the annular member 715 can change its position within a certain range, so that the connecting piece 5 on the U-shaped frame 4 connected to the series rod 704 can drive one end of the insulator to move to a certain extent. The three supporting forks 707 limit the horizontal movement direction of the series rod 704, so that the series rod 704 can only move in a direction parallel to the annular plate 702).

[0027] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention any equivalent substitution or change made according to the technical solution and inventive concept of the present invention.

Claims

1. An insulator tensile strength detection device, characterized in that Including an installation table (1); Two fixing plates (2), both of the two fixing plates (2) are located above the installation table (1), cutting holes are formed in both of the two fixing plates (2), and stabilizing columns (3) are fixedly connected in the cutting holes; Two tension sensors (6), both of the two tension sensors (6) are located between the two stabilizing columns (3), connecting pieces (5) are fixedly connected to the opposite sides of the two tension sensors (6), and connecting pieces (5) are movably connected to both of the two U-shaped frames (4); Two tension synchronization modules (7), both of the two tension synchronization modules (7) are located between the two fixing plates (2), and the tension synchronization modules (7) are located above the installation table (1), and the tension synchronization modules (7) are used to adjust the fixing position of the insulator and the device and the tension direction of the insulator to the same axis.

2. The insulator tensile strength detection device according to claim 1, wherein, The two tension synchronization modules (7) include two symmetric supporting plates (701), the supporting plates (701) are fixedly connected to the opposite sides of the stabilizing columns (3) on the same side, an annular plate (702) is arranged between the two supporting plates (701), a plurality of connecting rods (703) evenly distributed at equal intervals in the circumferential direction are fixedly connected between the annular plate (702) and the supporting plate (701) on the same side, and an annular frame (705) is fixedly connected to the side of the annular plate (702) close to the supporting plate (701), a series rod (704) is arranged on the annular plate (702), and a switching module (8) is arranged on both of the two U-shaped frames (4).

3. An insulator tensile strength detection device according to claim 2, characterized in that, Three rivets (706) evenly distributed at equal intervals in the circumferential direction are fixedly connected to the outside of the two annular frames (705), a supporting fork (707) is movably connected to the outside of each rivet (706), and the three supporting forks (707) on the same side are located on different planes. The inner walls of the supporting forks (707) are slidably connected to the outside of the series rod (704) on the same side. A limiting block (708) is fixedly connected to the side of the series rod (704) close to the supporting plate (701), and the limiting block (708) is attached to the outside of the outermost supporting fork (707).

4. An insulator tensile strength detection device according to claim 3, characterized in that, An annular guide rail (709) is fixedly connected to the side of the two annular plates (702) away from the supporting plate (701), a movable table (710) is slidably connected to the outside of the annular guide rail (709), a motor one (712) is fixedly connected to the outside of the movable table (710), the output ends of the motor one (712) are connected to a gear one (713) through couplings, a toothed ring (711) is fixedly connected to the outside of the annular guide rail (709), the toothed ring (711) is meshed with the gear one (713) on the same side, an extension plate (714) is fixedly connected to the outside of the movable table (710), a notch is formed in the extension plate (714), an annular member (715) is slidably connected in the notch, and the inner walls of the annular members (715) are fixedly connected to the outside of the series rod (704) on the same side.

5. An insulator tensile strength detection device according to claim 4, characterized in that, On the outside of each of the two movable platforms (710), a first lever arm (716) is movably connected. One end of each first lever arm (716) is fixedly connected with a round rod. On the outside of each round rod, a second lever arm (717) is movably connected. And the ends of the second lever arms (717) far away from the round rods are movably connected with the outside of the annular members (715) on the same side. A torsion spring (718) is wound around the outside of each round rod. One end of each torsion spring (718) is fixedly connected with the outside of the first lever arm (716), and the other end is fixedly connected with the outside of the second lever arm (717). On the outside of each movable platform (710), a convex seat is fixedly connected. A wire winding roller (719) is movably connected to each convex seat. On the outside of each convex seat, a second motor (720) is fixedly connected. The output ends of the second motors (720) are connected to one side of the wire winding rollers (719) on the same side through couplings. A steel wire rope (721) is fixedly connected to the outside of each wire winding roller (719). One end of the steel wire rope (721) far away from the wire winding roller (719) is fixedly connected with the outside of the annular member (715) on the same side.

6. The insulator tensile strength detection device according to claim 5, characterized in that, The switching module (8) includes three different fixing members (801). The fixing members (801) are all fixedly connected with the outside of the connecting members (5) on the same side. On one side of each of the two connecting members (5), a rotating seat (802) is fixedly connected. An annular frame (803) is arranged on the outside of each rotating seat (802). The annular frame (803) is fixedly connected with the opposite side of the U-shaped frame (4) on the same side. And on the inner wall of one side of each annular frame (803), three arc-shaped spring pieces (804) evenly distributed at equal circumferences are fixedly connected.

7. An insulator tensile strength detection device according to claim 6, characterized in that, On the outside of each of the two rotating seats (802), a support plate (805) is fixedly connected. The support plates (805) are all located inside the annular frames (803). And on the side of each support plate (805) close to the arc-shaped spring pieces (804), a convex block (806) is fixedly connected. The convex blocks (806) are all located between the two arc-shaped spring pieces (804) on the same side. A tensioning and adaptation module (9) is arranged on the installation table (1).

8. An insulator tensile strength detection device according to claim 7, characterized in that, The tensioning and adaptation module (9) includes a bidirectional lead screw (901). Two symmetrical round holes are formed in the installation table (1). The inner walls of the two round holes are movably connected with the outside of the bidirectional lead screw (901). And a second gear (902) is fixedly connected to the outside of the bidirectional lead screw (901). A third motor (903) is fixedly connected to the inner wall of the top of the installation table (1). The output end of the third motor (903) is connected with a fourth gear (904) through a coupling. The fourth gear (904) meshes with the second gear (902).

9. The insulator tensile strength detection device according to claim 8, characterized in that, On the outside of the bidirectional lead screw (901), two symmetrical moving frames (905) are arranged. Two symmetrical rectangular grooves (906) are formed in the installation table (1). The inner walls of the rectangular grooves (906) are all slidably connected with the outside of the moving frames (905) on the same side. And on the upper sides of the two moving frames (905), sliding grooves are formed. The inner walls of the sliding grooves are all slidably connected with the outside of the fixing plates (2) on the same side. Hydraulic rods (907) are fixedly connected to the outside of the moving frames (905). The output ends of the hydraulic rods (907) are fixedly connected with the outside of the fixing plates (2) on the same side.

10. A method for detecting the tensile strength of an insulator, using an insulator tensile strength detection device as described in claim 9, characterized in that, Including the following steps: Step 1. According to the length of the insulator to be measured, adjust through the tensioning and adaptation module (9) so that the two U-shaped frames (4) move to both ends of the insulator; Step 2. According to the fixing type of the insulator to be measured, use the switching module (8) to fix both ends of the insulator on the device; Step 3. Pre-tension the insulator, observe whether the values of the two tension sensors (6) are the same. If there is a difference, use the tension synchronization module (7) to adjust so that the fixing position of the insulator coincides with the stress axis of the insulator. After coincidence, perform formal tensioning. After testing, record the data.

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