CN219179130U - Large-scale post insulator bending and twisting compound testing machine - Google Patents

Abstract

The utility model relates to a large-scale post insulator bending and twisting compound testing machine which comprises a steel structure frame, a rotary workbench, a loading frame and a lifting driving mechanism. The rotary workbench is fixedly arranged at the lower part of the steel structure frame and is positioned between two side brackets of the steel structure frame; the loading frame is arranged between the two side brackets of the steel structure frame and can move up and down along the steel structure frame; the lifting driving mechanism is used for driving the loading frame to move up and down; the loading frame comprises a frame main body and a loading cross beam, the loading cross beam can move on the frame main body along the horizontal direction and the vertical direction, and a bending detection element is arranged on the loading cross beam. The rotary workbench and the loading cross beam of the testing machine can fix an insulator test piece, the test piece is rotated through the rotary workbench to carry out torsion test, the test piece is bent through the loading cross beam to carry out bending test, and the loading force during bending and torsion test is measured through the bending and torsion detection element on the loading cross beam, so that the testing machine is convenient to operate, time-saving and labor-saving.

Description

Large-scale post insulator bending and twisting compound testing machine

Technical Field

The utility model relates to the technical field of insulator testing machines, in particular to a large-scale post insulator bending and twisting compound testing machine.

Background

The insulator is used as an insulation control in a high-low voltage transmission and transformation process, and has strict requirements on the strength, environment and performance under the electrical load condition; the performance of the insulator is good or bad, and the service life and the operation life of the whole transformer substation and the power transmission and transformation circuit are related. The insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions, otherwise the insulator will not have a significant effect, which would impair the service and operational life of the entire line. Therefore, the mechanical test of the insulator is the most important one in the type test thereof, and is mainly used for verifying the mechanical strength of the insulator under test conditions.

At present, the existing insulator testing machine can only perform one of bending test and torsion test, and when the insulator is tested, the insulator test piece needs to be detached and replaced on different types of testing machines, so that different tests are performed, and the insulator test is time-consuming, labor-consuming and inconvenient to operate. Moreover, the existing insulator testing machine can only perform bending or torsion tests on small-sized post insulators, but for large-sized post insulators, the existing insulator testing machine cannot perform bending or torsion tests which simulate the working state of large-sized post insulator test pieces or are performed according to national verification standards because of large height and diameter and heavy weight. Meanwhile, when the bending torsion test is performed on the large-sized post insulator, more manpower time is consumed for disassembling and replacing the test piece, the labor intensity is high, the test cost is high, and the operation is more inconvenient.

Disclosure of Invention

In view of the above, the present utility model aims to provide a large-sized post insulator bending and twisting composite testing machine, which aims to solve the problems existing in the prior art.

According to the present utility model, there is provided a large-sized post insulator bending and twisting composite testing machine comprising: the device comprises a steel structure frame, a rotary workbench, a loading frame and a lifting driving mechanism;

the steel structure frame is of a portal frame structure and comprises two side brackets arranged at intervals and an upper cover plate fixedly connected to the tops of the two side brackets;

the rotary workbench is fixedly arranged at the lower part of the steel structure frame and is positioned between the two side brackets;

the loading frame is arranged between two side brackets of the steel structure frame and can move up and down along the steel structure frame;

the lifting driving mechanism is arranged at the top of the steel structure frame and used for driving the loading frame to move up and down;

the loading frame comprises a frame main body and a loading cross beam, wherein the loading cross beam can move on the frame main body along the horizontal direction and the vertical direction, and a bending detection element is arranged on the loading cross beam.

Preferably, the rotary workbench comprises a working disc, a base, a rotary driving mechanism and a slewing bearing;

the base is fixedly connected to the lower part of the steel structure frame, the inner ring of the slewing bearing is fixedly connected to the base, and the working disc is connected to the outer ring of the slewing bearing;

the rotary driving mechanism is fixedly connected to the base, and the driving end of the rotary driving mechanism is in transmission connection with the outer ring of the slewing bearing.

Preferably, the rotary workbench further comprises a plurality of clamping cylinders;

the clamping cylinders are arranged on the base and are uniformly distributed on the outer side of the working disc;

annular clamping grooves are formed in the outer sides of the working discs, clamping blocks are respectively arranged at the front ends of telescopic rods of the clamping oil cylinders, and when the telescopic rods of the clamping oil cylinders extend out, the clamping blocks are abutted to the clamping grooves so as to clamp and fix the working discs.

Preferably, the outer ring of the slewing bearing is provided with gear teeth, the output end of the rotary driving mechanism is provided with a driving gear, and the driving gear is meshed with the gear teeth of the outer ring of the slewing bearing for transmission.

Preferably, the frame body includes a left side frame, a right side frame, a front frame and a rear frame, wherein the left side frame is parallel to the right side frame and is arranged at intervals, the front ends of the left side frame and the right side frame are connected through the front frame, and the rear ends of the left side frame and the right side frame are connected through the rear frame;

two ends of the loading cross beam are respectively provided with a movable frame, the two movable frames are respectively arranged on the left side frame and the right side frame in a horizontal sliding manner, and two ends of the loading cross beam are respectively arranged on the two movable frames in a vertical sliding manner;

the two moving frames are respectively connected with the frame body in a transmission way through a first ball screw transmission mechanism, and the loading cross beam is respectively connected with the two moving frames in a transmission way through a second ball screw transmission mechanism.

Preferably, the two first ball screw transmission mechanisms are connected through a first synchronous transmission mechanism; the first synchronous transmission mechanism comprises a first servo motor, a first speed reducer, two first transmission rods and two first right-angle shaft speed reducers; the power output end of the first servo motor is connected with the power input end of the first speed reducer, the two power output ends of the first speed reducer are respectively connected with the first ends of the two first transmission rods, the second ends of the two first transmission rods are respectively connected with the power input ends of the two first right-angle shaft speed reducers, and the power output ends of the two first right-angle shaft speed reducers are respectively connected with the power input ends of the two first ball screw transmission mechanisms;

The two second ball screw transmission mechanisms are connected through a second synchronous transmission mechanism; the second synchronous transmission mechanism comprises a second servo motor, a second speed reducer, two second transmission rods and two second right angle shaft speed reducers; the power output end of the second servo motor is connected with the power input end of the second speed reducer, the two power output ends of the second speed reducer are respectively connected with the first ends of the two second transmission rods, the second ends of the two second transmission rods are respectively connected with the power input ends of the two second right angle shaft speed reducers, and the power output ends of the two second right angle shaft speed reducers are respectively connected with the power input ends of the two second ball screw transmission mechanisms.

Preferably, guide posts are respectively arranged on the inner sides of the two side brackets, guide wheel groups corresponding to the guide posts are respectively arranged on the two sides of the loading frame, each guide wheel group comprises two side guide wheels arranged at intervals and two inner guide wheels coaxially arranged, the two side guide wheels are respectively arranged on the front side and the rear side of the guide posts in a rolling mode, and the two inner guide wheels are arranged on the inner side of the guide posts in a rolling mode.

Preferably, locking vertical plates are further arranged on the inner sides of the two side brackets respectively, locking oil cylinder groups corresponding to the locking vertical plates are arranged on the two sides of the loading frame respectively, each locking oil cylinder group comprises two oppositely arranged locking oil cylinders, and the two locking oil cylinders are arranged on the front side and the rear side of the locking vertical plates respectively; when the telescopic rods of the two locking cylinders of the locking cylinder group extend out, the front ends of the telescopic rods of the two locking cylinders are clamped and fixed on the locking vertical plate, so that the movement of the loading frame is limited.

Preferably, the lifting driving mechanism comprises a motor speed reducer group, two first connecting rods, two third right-angle shaft speed reducers, two second connecting rods, a plurality of first chain wheels, a plurality of second chain wheels, a plurality of chains and a plurality of lifting weights; wherein,,

steel wire rope sliding wheels are symmetrically arranged on two sides of the top of the steel structure frame respectively, steel wire ropes are connected to two sides of the loading frame respectively, one end of each steel wire rope is connected with the top of the loading frame, and the other end of each steel wire rope bypasses the corresponding steel wire rope sliding wheel and is connected with the balancing weight;

the motor speed reducer unit is arranged in the middle of the upper cover plate, the power output ends of the motor speed reducer unit are respectively connected with the first ends of the two first connecting rods, the second ends of the two first connecting rods are respectively connected with the power input ends of the two third right angle shaft speed reducers, the power output ends of the two third right angle shaft speed reducers are respectively connected with the two second connecting rods, and the two second connecting rods are respectively arranged on two sides of the upper cover plate in a rotating mode;

And a plurality of first chain wheels are coaxially and fixedly arranged on each second connecting rod, a plurality of second chain wheels are correspondingly arranged on the upper cover plate at the outer side of each second connecting rod, the first ends of a plurality of chains are respectively connected with the two sides of the top of the loading frame, and the second ends of the chains are respectively connected with lifting weights after respectively and sequentially bypassing the corresponding first chain wheels and the second chain wheels.

Preferably, the sample crane is mounted on the top of the steel structure frame.

The large-scale post insulator bending and twisting compound testing machine provided by the utility model can be used for installing a large-scale post insulator test piece between the rotary workbench and the loading cross beam of the loading frame, the rotary workbench rotates the test piece by fixing the loading cross beam, the torsion test data of the test piece can be obtained, and the bending test data of the test piece can be obtained by fixing the rotary workbench, and the loading cross beam moves to bend the test piece. The bending and torsion test of the large-scale post insulator test piece can be completed through one-time assembly and disassembly of the testing machine, the operation is convenient, time and labor are saved, and the labor intensity and the test cost are reduced.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a front view structure of a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 2 shows a schematic top view of a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

Fig. 3 shows a schematic left-view structure of a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 4 shows a schematic structural view of a rotary table in a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

Fig. 5 shows a schematic top view of a rotary table in a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

Fig. 6 shows a schematic structural diagram of a connection between a clamping cylinder and a base in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 7 shows a schematic structural view of a rotation driving mechanism in a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

Fig. 8 shows a schematic diagram of a front view of a loading frame in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 9 shows a schematic top view of a loading frame in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 10 shows a schematic diagram of a connection structure of a guide wheel group, a locking cylinder group and a frame body in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 11 shows a schematic layout of a first ball screw transmission mechanism and a second ball screw transmission mechanism of a loading frame in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 12 is a schematic diagram showing a front view of a lift driving mechanism in a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

Fig. 13 shows a schematic top view of a lift drive mechanism in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 14 shows a schematic diagram of connection of a wire rope, a chain and a loading frame of a lifting driving mechanism in a large-scale post insulator bending and twisting composite testing machine according to an embodiment of the utility model.

Fig. 15 shows a schematic structural view of a sample crane in a large-sized post insulator bending and twisting composite testing machine according to an embodiment of the present utility model.

In the figure: 1. a steel structure frame; 11. a side bracket; 12. an upper cover plate; 13. a guide post; 14. locking the vertical plate; 15. a support frame; 16. a ladder stand; 17. a side guard rail; 18. an upper guard rail; 19. a front upright; 2. a rotary table; 21. a working plate; 211. a clamping groove; 22. a base; 23. a rotary driving mechanism; 231. a driving motor; 232. driving a speed reducer; 233. a gear box; 234. a drive gear; 24. a slewing bearing; 25. clamping an oil cylinder; 251. a clamping block; 26. a table top cover plate; 27. reinforcing I-steel; 3. loading a frame; 31. a frame body; 311. a left side frame; 312. a right side frame; 313. a front frame; 314. a rear frame; 32. loading a cross beam; 321. a slide plate; 322. a torque sensor; 323. a spoke-type load sensor; 33. a moving frame; 331. installing a fence frame; 34. a first ball screw transmission mechanism; 35. a second ball screw transmission mechanism; 36. a first synchronous transmission mechanism; 361. a first speed reducer; 362. a first transmission rod; 363. a synchronous pulley; 364. a synchronous belt; 37. a second synchronous transmission mechanism; 371. a second speed reducer; 372. a second transmission rod; 373. a second right angle shaft speed reducer; 38. a guide wheel set; 381. a side guide wheel; 382. an inner guide wheel; 383. a guide wheel bracket; 39. locking the oil cylinder group; 391. locking the oil cylinder; 392. locking the oil cylinder bracket; 4. a lifting drive mechanism; 401. a wire rope pulley; 402. a wire rope; 403. balancing weight; 41. a motor speed reducer unit; 42. a first link; 43. a third right angle shaft speed reducer; 44. a second link; 45. a first sprocket; 46. a second sprocket; 47. a chain; 48. lifting the weight; 5. a sample crane; 51. a crane guide rail; 52. a crane girder; 53. and a crane hook.

Detailed Description

Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.

The utility model provides a large-scale post insulator bending and twisting compound testing machine, which is shown in figures 1 to 3, and comprises a steel structure rack 1, a rotary workbench 2, a loading frame 3 and a lifting driving mechanism 4; the steel structure frame 1 is a portal frame structure and comprises two side brackets 11 arranged at intervals and an upper cover plate 12 fixedly connected to the tops of the two side brackets 11; the rotary workbench 2 is fixedly arranged at the lower part of the steel structure frame 1 and is positioned between the two side brackets 11; the loading frame 3 is arranged between two side brackets 11 of the steel structure frame 1, and the loading frame 3 can move up and down along the steel structure frame 1; the lifting driving mechanism 4 is arranged at the top of the steel structure frame 1 and is used for driving the loading frame 3 to move up and down; the loading frame 3 comprises a frame body 31 and a loading cross beam 32, the loading cross beam 32 can move on the frame body 31 along the horizontal direction and the vertical direction, and a bending detection element is arranged on the loading cross beam 32.

Specifically, in this embodiment, two side brackets 11 of the steel structure frame 1 are welded by square steel pipes and/or rectangular steel pipes, the whole side brackets 11 are in a sheet-shaped frame structure, the whole height of the side brackets 11 is 22m to 23m, and the interval distance between the two side brackets 11 is 6m to 7m, so as to satisfy that the existing large-scale post insulator can complete the bending torsion test in the space formed by the existing large-scale post insulator. The bottom plates of the two side brackets 11 can be connected through the bottom plates, the tops of the two side brackets 11 can be connected through transverse connecting rods, and then the two side brackets are connected through an upper cover plate 12 at the top, so that the distance between the two side brackets 11 is kept stable. The front side of the upper cover plate 12 is provided with an opening, so that the upper cover plate 12 is of a concave structure as a whole, and the opening is used for hoisting a large-sized post insulator test piece during installation and disassembly; the top of the side bracket 11 can be provided with a connecting flange, and the upper cover plate 12 can be fixedly connected with the connecting flange at the top of the side bracket 11 through screws. In order to enhance the stability of the steel structure frame 1, two groups of supporting frames 15 are further arranged on the outer sides of the two side supports 11 respectively, the supporting frames 15 are obliquely supported on the outer sides of the side supports 11, the stability of the side supports 11 is enhanced, and the bottoms of the side supports 11 and the bottoms of the supporting frames 15 can be fixed on the ground through anchor bolts.

The top of the steel structure frame 1 is further provided with a sample crane 5, specifically, the sample crane 5 is installed on the top of the upper cover plate 12, referring to fig. 15, the sample crane 5 includes two parallel crane rails 51, and the two crane rails 51 are supported on the top of the upper cover plate 12 through a plurality of struts, so that the two rails are higher than the surface of the upper cover plate 12 by a preset distance, and the installation space of the lifting driving mechanism 4 is satisfied; the two crane guide rails 51 are arranged at intervals and in parallel, the two crane guide rails 51 extend along the front-back direction of the steel structure frame 1, two groups of travelling wheels are arranged at the bottom of a crane girder 52 of the sample crane 5, the two groups of travelling wheels are arranged on the two crane guide rails 51 in a rolling way, and the two travelling wheels travel forwards and backwards through motor driving; the crane girder 52 is provided with an electric hoist, and a steel wire rope 402 of the electric hoist is connected with a crane hook 53 for hoisting a large-sized post insulator test piece. The traveling of the sample crane 5 and the lifting of the crane hook 53 can be controlled wirelessly, which is convenient and safe to operate. Through set up sample crane 5 on steel construction frame 1, made things convenient for the hoist and mount of large-scale pillar insulator test piece, need not with the help of hoisting equipment such as large-scale crane, can accomplish the test piece installation.

For the convenience of the sample crane 5 to hoist and mount large-scale post insulator test piece, be provided with the support extension section in the front portion of two side stand 11, this support extension section includes front pillar 19, and connect the side tie-beam of front pillar 19 and side stand 11, the upper end of side tie-beam connection side stand 11 and front pillar 19, the lower extreme of front pillar 19 passes through the sill anchor to be fixed subaerial, the upper portion of two front pillar 19 still is connected through the front tie-beam, in order to guarantee the stability between two front pillar 19. The crane rail 51 of the specimen crane 5 extends to the top of the carriage extension, so that the specimen crane 5 can hoist the specimen from the outside of the steel structure frame 1 to the rotary table 2 between the two sides.

One side of the steel structure frame 1 is further provided with a ladder stand 16 for a person to climb to the top of the frame, the ladder stand 16 is divided into 3 sections and comprises a lower section ladder stand, a middle small platform and an upper section ladder stand, and the ladder stand 16 extends to the top of the steel structure frame 1 from the bottom of the steel structure frame 1. Staff can climb to the top of the steel structure frame 1 through the crawling ladder 16, and install, detach and maintain the lifting driving mechanism 4 and the sample crane 5 at the top of the steel structure frame 1.

In order to ensure the operation safety of staff, an upper guard rail 18 is further arranged on the upper cover plate 12 at the top of the steel structure frame 1, three sides of the upper guard rail 18 are arranged on the upper cover plate 12, namely, the left side, the right side and the upper side of the upper cover plate 12 are both provided with the upper guard rail 18, and the front side of the upper cover plate 12 is used for the front and back movement of the sample crane 5 without the upper guard rail 18. Meanwhile, the side guard rails 17 are arranged at the supporting frames 15 on two sides of the lower portion of the steel structure frame 1, the side guard rails 17 are arranged at the middle positions of the two groups of supporting frames 15 on each side, personnel are prevented from entering the side faces of the side frames 11, and operation safety is guaranteed.

Referring to fig. 4 to 7, the rotary table 2 includes a working plate 21, a base 22, a rotary drive mechanism 23, and a slewing bearing 24; the base 22 is fixedly connected to the lower part of the steel structure frame 1, the inner ring of the slewing bearing 24 is fixedly connected to the base 22, and the working disc 21 is connected to the outer ring of the slewing bearing 24; the rotary driving mechanism 23 is fixedly connected to the base 22, and the driving end of the rotary driving mechanism 23 is in transmission connection with the outer ring of the slewing bearing 24.

The rotary workbench 2 is a platform for mounting a large-scale post insulator test piece and is also a power driving mechanism for performing torsion test. The working disk 21 is a circular plate-shaped member, and can rotate around the center axis of the working disk, and the lower end of the test piece can be fixed on the working disk 21 through a connecting fastener or a connecting clamp. The base 22 is formed by welding steel plates and sectional materials, a cylindrical bearing mounting seat is arranged in the middle of the base 22, an inner ring of the slewing bearing 24 is connected to the top of the bearing mounting seat through bolts, the working disc 21 and the slewing bearing 24 are coaxially arranged, and the working disc 21 is connected to an outer ring of the slewing bearing 24 through bolts. In this embodiment, the diameter of the working disk 21 is 4m, and a large-sized post insulator test piece having a diameter of 4m can be tested at maximum.

In the rotary table 2, the outer ring of the slewing bearing 24 is provided with gear teeth, the output end of the rotary driving mechanism 23 is provided with a driving gear 234, and the driving gear 234 is meshed with the gear teeth of the outer ring of the slewing bearing 24 for transmission, so that the working disc 21 is driven to rotate, and a torsion test of a test piece is performed. In this embodiment, the rotary driving mechanism 23 includes a driving motor 231, a driving reducer 232 and a gear box 233, where a power output end of the driving motor 231 is connected to a power input end of the driving reducer 232, the driving reducer 232 is fixed on the gear box 233, two gears meshed with each other are in the gear box 233, and are a transmission gear meshed with the power output end of the driving reducer 232 and a driving gear 234 respectively, and an outer edge portion of the driving gear 234 exposes out of the casing of the gear box 233 to be meshed with teeth of an outer ring of the slewing bearing 24 for transmission. The gear case 233 is fixedly coupled to the base 22 by screws.

Further, the rotary table 2 further includes a plurality of clamping cylinders 25; the clamping cylinders 25 are arranged on the base 22, and the clamping cylinders 25 are uniformly distributed on the outer side of the working plate 21; an annular clamping groove 211 is formed in the outer side of the working disc 21, and clamping blocks 251 are respectively arranged at the front ends of the telescopic rods of the clamping cylinders 25, and when the telescopic rods of the clamping cylinders 25 extend out, the clamping blocks 251 are abutted in the clamping groove 211 so as to clamp and fix the working disc 21. In this embodiment, four clamping cylinders 25 are uniformly disposed in the circumferential direction of the working plate 21, four cylinder mounting seats made of H-shaped steel are uniformly disposed on the base 22 along the circumferential direction of the working plate 21, a cylinder barrel of the clamping cylinder 25 is fixedly connected to the top of the cylinder mounting seat, a clamping block 251 is fixedly connected to the front end of a telescopic rod of the clamping cylinder 25, the clamping block 251 is a wedge-shaped block, and a clamping ring groove is a wedge-shaped groove. During clamping, the telescopic rod of the clamping oil cylinder 25 is pushed out, and the wedge-shaped clamping block 251 at the front end of the telescopic rod is clamped into the wedge-shaped clamping groove 211 at the periphery side of the working disc 21, so that the clamping oil cylinder plays a role of a fixed disc and can limit the rotation of the working disc 21 during a test piece bending test; the telescopic rod of the clamping cylinder 25 is retracted, the wedge-shaped clamping block 251 at the front end of the telescopic rod of the clamping cylinder 25 is disengaged from the wedge-shaped clamping groove 211 on the working disc 21, and the working disc 21 can be rotated. The hydraulic power source of the clamping oil cylinder is a small hydraulic pump station and consists of a three-phase asynchronous motor, a hydraulic oil pump, an oil filter, an oil tank, a one-way valve, a reversing valve, an overflow valve, a pressure gauge and the like, and is arranged on a base 22 on the outer side of a working disc 21. A table top cover plate is further arranged around the working plate 21, the table top cover plate is arranged around the working plate 21, and the upper surface of the table top cover plate and the upper surface of the working plate 21 are on the same plane; the table top cover plate protects the clamping cylinder 25, a hydraulic power source of the clamping cylinder and the rotary driving mechanism 23, and as shown in fig. 5, four cover plates are spliced to form a protection structure with square periphery.

The rotary workbench 2 is arranged between the two side brackets 11 at the lower part of the steel structure frame 1 and is positioned at the middle position of the two side brackets 11, and the base 22 of the rotary workbench 2 can be fixedly connected on the bottom plate of the steel structure frame 1. In order to make the rotary table 2 be fixed more firmly and reliably, the outside of the rotary table 2 is also provided with a reinforcing I-steel 27, the reinforcing I-steel 27 is welded outside the base 22 of the rotary table 2, the end part of the reinforcing I-steel 27 is connected and fixed with the lower part of the steel structure frame 1 in a welding or bolt connection mode, the bottom part of the reinforcing I-steel 27 is connected and fixed with the bottom plate of the steel structure frame 1 in a welding or bolt connection mode, and the rigidity of the rotary table 2 is further increased.

See the schematic structural diagrams of the loading frame 3 shown in fig. 8 and 9. The frame body 31 of the loading frame 3 includes a left side frame 311, a right side frame 312, a front frame 313 and a rear frame 314, the left side frame 311 is parallel to the right side frame 312 and spaced apart from the right side frame 312, front ends of the left side frame 311 and the right side frame 312 are connected through the front frame 313, and rear ends of the left side frame 311 and the right side frame 312 are connected through the rear frame 314; two ends of the loading beam 32 are respectively provided with a movable frame 33, two movable frames 33 are respectively arranged on the left side frame 311 and the right side frame 312 in a horizontal sliding manner, and two ends of the loading beam 32 are respectively arranged on the two movable frames 33 in a vertical sliding manner; the two movable frames 33 are respectively connected with the frame main body 31 in a transmission way through a first ball screw transmission mechanism 34, and the loading cross beam 32 is respectively connected with the two movable frames 33 in a transmission way through a second ball screw transmission mechanism 35.

The first ball screw transmission mechanism 34 includes a first ball screw and a first screw nut, the first ball screw is horizontally disposed on the left side frame 311 and the right side frame 312 of the frame body 31, two ends of the first ball screw are respectively rotatably connected to the frame body 31, the first screw nut is screwed to the first ball screw, and the first screw nut is fixedly connected to the moving frame 33; the second ball screw transmission mechanism 35 includes a second ball screw and a second screw nut, the second ball screw is vertically disposed on the moving frame 33, two ends of the second ball screw are respectively rotatably connected to the moving frame 33, the second screw nut is screwed to the second ball screw, and the second screw nut is fixedly connected to an end of the loading beam 32. In this embodiment, two ends of the loading beam 32 are respectively and fixedly connected with a sliding plate 321, and a second screw nut is fixedly connected to the screw nut; two rollers are symmetrically arranged on the front side and the rear side of the sliding plate 321 respectively, vertical guide rails are correspondingly arranged on the front side and the rear side of the moving frame 33 respectively, and the two rollers on the front side and the rear side of the sliding plate 321 are respectively arranged on the two vertical guide rails of the moving frame 33 in a rolling manner; the top and bottom of the moving frame 33 are symmetrically provided with two rollers, respectively, and the upper and lower sides of the left and right side frames 312 of the frame body 31 are correspondingly provided with transverse guide rails, respectively, and the two rollers on the upper and lower sides of the moving frame 33 are arranged on the two transverse guide rails of the side frame on one side of the frame body 31 in a rolling manner, respectively. In this embodiment, the effective stroke of the first ball screw transmission mechanism 34 (the moving distance of the first screw nut) is 5 meters, and the effective stroke of the second ball screw transmission mechanism 35 (the moving distance of the second screw nut) is 2 meters, so as to meet the requirement of the bending test of the large-scale post insulator test piece.

The loading frame 3 is a loading driving mechanism for performing a bending test on a large-sized post insulator test piece. The loading frame 3 can be driven by the lifting driving mechanism 4 to move up and down in the frame of the steel structure frame 1 so as to meet the test of test pieces with different heights.

The frame body 31 has a rectangular rigid frame structure, and the frame body 31 is integrally formed by welding various profiles. The lifting ends of the lifting drive mechanism 4 are connected to both sides of the top of the frame body 31 to lift the entire loading frame 3.

Referring to fig. 9 and 10, in order to enable the loading frame 3 to move up and down in the vertical direction within the steel structure frame 1, guide posts 13 are respectively disposed on the inner sides of the two side brackets 11, guide wheel sets 38 corresponding to the guide posts 13 are respectively disposed on both sides of the loading frame 3, the guide wheel sets 38 include two side guide wheels 381 disposed at intervals and two inner guide wheels 382 disposed coaxially, the two side guide wheels 381 are respectively disposed on the front and rear side surfaces of the guide posts 13 in a rolling manner, and the two inner guide wheels 382 are disposed on the inner side surfaces of the guide posts 13 in a rolling manner. Specifically, the side guide wheel 381 and the inner guide wheel 382 are rotatably disposed on a guide wheel bracket 383, and the guide wheel bracket 383 is mounted and fixed on the frame body 31. In this embodiment, two guide posts 13 are respectively disposed on the inner side of each side bracket 11, four sets of guide wheel sets 38 are respectively disposed on two sides of the frame body 31, the four sets of guide wheel sets 38 on each side of the frame body 31 are divided into two sets, and the two sets of guide wheel sets 38 of each set are disposed up and down and all roll on one guide post 13.

Further, in order to enable the loading frame 3 to be locked and fixed with the steel structure frame 1 at a certain height position in the steel structure frame 1, limiting the movement of the loading frame 3, locking vertical plates 14 are further respectively arranged on the inner sides of the two side brackets 11, locking cylinder groups 39 corresponding to the locking vertical plates 14 are respectively arranged on two sides of the loading frame 3, each locking cylinder group 39 comprises two opposite locking cylinders 391, and the two locking cylinders 391 are respectively arranged on the front side and the rear side of the locking vertical plates 14; when the telescopic rods of the two locking cylinders 391 of the locking cylinder group 39 are extended, the front ends of the telescopic rods of the two locking cylinders 391 are clamped and fixed on the locking vertical plate 14, thereby restricting the movement of the loading frame 3. Specifically, in this embodiment, the locking vertical plate 14 is welded and fixed vertically at the middle position of the inner side surface of the guide post 13, and the center line of the locking cylinder group 39 coincides with the center line of the corresponding guide wheel group 38; two locking cylinders 391 in the locking cylinder group 39 are both provided on a locking cylinder bracket 392, and the locking cylinder bracket 392 is mounted and fixed on the frame body 31. In this embodiment, the cylinders of the two locking cylinders 391 in the locking cylinder group 39 are fixedly connected to the locking cylinder bracket 392, the two locking cylinders 391 are coaxially disposed, the front ends of the telescopic rods of the two locking cylinders 391 are provided with locking clamping blocks, the locking clamping blocks are in rectangular plate-shaped structures, and the locking clamping blocks can increase the acting area of the locking vertical plate 14 and increase the friction force during locking. In this embodiment, the number of the locking cylinder groups 39 is the same as the number of the guiding wheel groups 38, and the locking cylinder groups 39 are disposed on one side of the guiding wheel groups 38 in a one-to-one correspondence. The hydraulic power source of the locking cylinder is also a small hydraulic pump station, and is fixedly arranged on the frame main body 31, as shown in fig. 11, and is fixedly connected to the right side frame 312 of the frame main body 31 and electrically controlled.

In the loading frame 3, in order to enable the two moving frames 33 to move horizontally in synchronization, the two first ball screw mechanisms 34 are connected by a first synchronization transmission mechanism 36. The first synchronous transmission mechanism 36 comprises a first servo motor, a first speed reducer 361, two first transmission rods 362 and two first right-angle shaft speed reducers; the power output end of the first servo motor is connected with the power input end of the first speed reducer 361, the two power output ends of the first speed reducer 361 are respectively connected with the first ends of the two first transmission rods 362, the second ends of the two first transmission rods 362 are respectively connected with the power input ends of the two first right-angle shaft speed reducers, and the power output ends of the two first right-angle shaft speed reducers are respectively connected with the power input ends of the two first ball screw transmission mechanisms 34. Specifically, the first synchronous transmission mechanism 36 is disposed on the rear frame 314 of the frame body 31, the first speed reducer 361 is disposed at a middle position of the rear frame 314, the first speed reducer 361 is a dual-output shaft speed reducer, an output shaft of the first speed reducer 361 is connected with the first transmission rod 362 through a coupling, and the first transmission rod 362 is connected with an input shaft of the first right-angle shaft speed reducer through a coupling. Referring to fig. 11, in the present embodiment, two first ball screw transmission mechanisms 34 are provided on the left side frame 311 and the right side frame 312 of the frame body 31, respectively, so that the moving frame 33 can be smoothly moved horizontally. The input ends of the two first ball screw transmission mechanisms 34 are connected through a transmission mechanism composed of a synchronous belt 364 and a synchronous pulley 363, specifically, the power input ends of the two first ball screw transmission mechanisms 34 arranged on the same side up and down are respectively fixedly connected with one synchronous pulley 363, the two synchronous pulleys 363 are in transmission connection through the synchronous belt 364, when the first ball screw positioned above is driven to rotate by the first synchronous transmission mechanism 36, the first ball screw positioned below is synchronously rotated by the synchronous transmission function of the synchronous belt 364, so that the first screw nut is synchronously driven to linearly move, and the two moving frames 33 can be stably and horizontally synchronously moved.

In order to enable the two ends of the loading beam 32 to synchronously move horizontally, the two second ball screw transmission mechanisms 35 are connected through a second synchronous transmission mechanism 37; the second synchronous transmission mechanism 37 comprises a second servo motor, a second speed reducer 371, two second transmission rods 372 and two second right angle shaft speed reducers 373; the power output end of the second servo motor is connected with the power input end of the second speed reducer 371, the two power output ends of the second speed reducer 371 are respectively connected with the first ends of the second transmission rods 372, the second ends of the second transmission rods 372 are respectively connected with the power input ends of the second right angle shaft speed reducer 373, and the power output ends of the second right angle shaft speed reducer 373 are respectively connected with the power input ends of the second ball screw transmission mechanism 35. Specifically, the upper ends of the two moving frames 33 are provided with a connecting beam, the second synchronous transmission mechanism 37 is arranged on the connecting beam between the two moving frames 33, the second speed reducer 371 is arranged at the middle position of the connecting beam, the second speed reducer 371 is a double-output shaft speed reducer, the output shaft of the second speed reducer 371 is connected with the second transmission rod 372 through a coupler, and the second transmission rod 372 is connected with the input shaft of the second right-angle shaft speed reducer 373 through the coupler. Referring to fig. 8, in this embodiment, a mounting frame 331 is further provided on top of the two moving frames 33, the mounting frame 331 is located on the upper portion of the second synchronous transmission mechanism 37, and a worker can stand on the mounting frame 331 to mount and maintain the components on the upper portion of the loading frame 3.

In the loading frame 3, the bending detection element provided on the loading beam 32 includes a spoke type load sensor 323 and a torque sensor 322, the spoke type load sensor 323 measuring the loading force of the bending test, and the torque sensor 322 measuring the loading force of the torsion test. Referring to fig. 8 and 9, in the present embodiment, the torque sensor 322 is installed at a bottom middle position of the loading beam 32, and the spoke type load sensor 323 is installed at a front side middle position of the loading beam 32.

Referring to fig. 12 to 14, the lifting driving mechanism 4 includes a motor speed reducer 41, two first links 42, two third right angle shaft speed reducers 43, two second links 44, a plurality of first sprockets 45, a plurality of second sprockets 46, a plurality of chains 47, and a plurality of lifting weights 48; the steel structure frame comprises a steel structure frame 1, a loading frame 3 and a balancing weight 403, wherein steel wire rope sliding wheels 401 are symmetrically arranged on two sides of the top of the steel structure frame 1 respectively, steel wire ropes 402 are connected to two sides of the loading frame 3 respectively, one end of each steel wire rope 402 is connected with the top of the loading frame 3, and the other end of each steel wire rope 402 bypasses the steel wire rope sliding wheels 401 and then is connected with the balancing weight 403; the motor speed reducer 41 is disposed in the middle of the upper cover 12, the power output ends of the motor speed reducer 41 are respectively connected with the first ends of the two first connecting rods 42, the second ends of the two first connecting rods 42 are respectively connected with the power input ends of the two third right angle shaft speed reducers 43, the power output ends of the two third right angle shaft speed reducers 43 are respectively connected with the two second connecting rods 44, and the two second connecting rods 44 are respectively rotatably disposed at two sides of the upper cover 12; a plurality of first chain wheels 45 are coaxially and fixedly arranged on each second connecting rod 44, a plurality of second chain wheels 46 are correspondingly arranged on the upper cover plate 12 outside each second connecting rod 44, first ends of a plurality of chains 47 are respectively connected with two sides of the top of the loading frame 3, and second ends of a plurality of chains 47 are respectively connected with lifting weights 48 after bypassing the corresponding first chain wheels 45 and second chain wheels 46 in turn.

Specifically, the upper cover plate 12 on the top of the steel structure frame 1 is provided with a plurality of through holes, the through holes are used for the steel wire ropes 402 and the chains 47 to pass through, and the setting positions of the through holes correspond to the setting positions of the chains 47 and the steel wire ropes 402. In this embodiment, as shown in fig. 13, four sets of steel wire rope 402 pulleys are respectively disposed on two sides of the upper cover plate 12, the four sets of steel wire rope 402 pulleys are disposed at intervals, each set of steel wire rope 402 pulleys includes two steel wire rope 402 pulleys, the two steel wire rope 402 pulleys of each set are disposed above the inner side and the outer side of the side bracket 11 respectively, the steel wire ropes 402 bypass the two steel wire rope 402 pulleys of each set and then extend downwards, one end located at the inner side of the side bracket 11 is connected with the top of the frame main body 31, one end located at the outer side of the side bracket 11 is connected with the balancing weights 403, and the total weight of all the balancing weights 403 is equal to or approximately equal to the total weight of the loading frame 3, so that the lifting driving mechanism 4 can lift the loading frame 3 up and down with smaller lifting force, and the lifting driving mechanism 4 can be further have smaller weight and volume, and convenient arrangement and space and manufacturing cost saving.

With continued reference to fig. 13, in this embodiment, three sets of sprockets are respectively disposed on two sides of the upper cover 12, the three sets of sprockets are disposed at intervals, each set of sprockets is respectively disposed between two adjacent sets of pulleys of the steel wire rope 402, each set of sprockets includes a first sprocket 45 and a second sprocket 46, the first sprocket 45 is fixedly connected to the second link 44 coaxially and rotatably driven by the third right-angle shaft reducer 43, the second sprocket 46 is correspondingly disposed on the outer side (the side far from the center of the upper cover 12) of the first sprocket 45, the first sprocket 45 and the second sprocket 46 are disposed above the inner and outer sides of the side bracket 11, the chain 47 is disposed to extend downward after bypassing the first sprocket 45 and the second sprocket 46 of each set, one end located on the inner side of the side bracket 11 is connected to the top of the frame body 31, one end located on the outer side of the side bracket 11 is connected to the lifting weight 48, and since the weight 403 has balanced the weight of the loading frame 3, the weight of the lifting weight 48 does not need to be set to be a large weight, and the chain 47 can have sufficient meshing force on the first sprocket 45 and the second sprocket 46. The lifting driving mechanism 4 can synchronously and reversely drive the two second connecting rods 44 on two sides to rotate, so that the two sides of the loading frame 3 are synchronously lifted, and the lifting is stable and reliable.

The operation and use method of the large-scale post insulator bending and twisting compound testing machine is as follows:

the insulator test piece is lifted to the rotary workbench 2 by using the sample crane 5, and the lower end of the test piece is fixedly connected to the working disc 21 of the rotary workbench 2. Test piece torsion test: the loading frame 3 is controlled to descend to a proper height by the lifting driving mechanism 4, and the upper end of the test piece is fixedly connected to the bottom of the loading cross beam 32. Before the torsion test starts, the telescopic rod of the locking oil cylinder 391 on the loading frame 3 is controlled to extend, and the locking oil cylinder group 39 on the loading frame 3 locks and fastens the loading frame 3 on the steel structure frame 1 to limit the movement of the loading frame. In the torsion test, the rotary table 2 is started to rotate the table 21, the torsion test is performed on the test piece, and the torque sensor 322 provided on the load beam 32 measures the load force of the torsion test. Test piece bending test: the connection between the upper end of the test piece and the loading cross beam 32 is released, the locking between the locking cylinder 391 and the steel structure frame 1 is released, the movement of the loading frame 3 is controlled by the lifting driving mechanism 4, and the horizontal movement of the loading cross beam 32 is controlled by the first synchronous transmission mechanism 36, so that the loading cross beam 32 is positioned behind the upper end of the test piece; before the bending test starts, the telescopic rod of the locking oil cylinder 391 on the loading frame 3 is controlled to extend, the locking oil cylinder group 39 on the loading frame 3 locks and fixes the frame main body 31 of the loading frame 3 on the steel structure frame 1 to limit the movement of the frame main body, and meanwhile, the clamping oil cylinder 25 of the rotary workbench 2 is controlled to clamp and fix the working disc 21 to limit the rotation of the working disc. During bending test, the first synchronous transmission mechanism 36 and the second synchronous transmission mechanism 37 are started to control the loading beam 32 to horizontally move forwards to push the upper end of the test piece to bend the test piece, in the bending process, the vertical height of the test piece changes, the second synchronous transmission mechanism 37 is used to control the loading beam 32 to vertically move downwards, so that the loading beam 32 always acts on the same position at the upper end of the test piece, specifically, the corresponding relation between the horizontal movement distance and the vertical movement distance of the loading beam 32 can be calculated in advance according to the type of the test piece, and the horizontal movement distance and the vertical movement distance of the loading beam 32 are adaptively controlled during test. The loading force of the bending test is measured by a spoke-type load sensor 323 provided on the loading beam 32.

In summary, the large-scale post insulator bending and twisting compound testing machine provided by the utility model can be used for installing a large-scale post insulator test piece between the rotary workbench and the loading cross beam of the loading frame, the rotary workbench is used for rotating the test piece by fixing the loading frame and the loading cross beam, the torsion test data of the test piece can be obtained, and the bending test data of the test piece can be obtained by fixing the rotary workbench, so that the loading cross beam is moved to bend the test piece. The bending and torsion test of the large-scale post insulator test piece can be completed through one-time assembly and disassembly of the testing machine, the operation is convenient, time and labor are saved, and the labor intensity and the test cost are reduced.

It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (10)

1. The utility model provides a large-scale pillar insulator bending and twisting compound test machine which characterized in that includes: the device comprises a steel structure frame, a rotary workbench, a loading frame and a lifting driving mechanism;

the steel structure frame is of a portal frame structure and comprises two side brackets arranged at intervals and an upper cover plate fixedly connected to the tops of the two side brackets;

the rotary workbench is fixedly arranged at the lower part of the steel structure frame and is positioned between the two side brackets;

the loading frame is arranged between two side brackets of the steel structure frame and can move up and down along the steel structure frame;

the lifting driving mechanism is arranged at the top of the steel structure frame and used for driving the loading frame to move up and down;

The loading frame comprises a frame main body and a loading cross beam, wherein the loading cross beam can move on the frame main body along the horizontal direction and the vertical direction, and a bending detection element is arranged on the loading cross beam.

2. The large post insulator bending and twisting composite testing machine according to claim 1, wherein the rotary workbench comprises a working disc, a base, a rotary driving mechanism and a slewing bearing;

the base is fixedly connected to the lower part of the steel structure frame, the inner ring of the slewing bearing is fixedly connected to the base, and the working disc is connected to the outer ring of the slewing bearing;

the rotary driving mechanism is fixedly connected to the base, and the driving end of the rotary driving mechanism is in transmission connection with the outer ring of the slewing bearing.

3. The large post insulator bending and twisting composite testing machine according to claim 2, wherein the rotary table further comprises a plurality of clamping cylinders;

the clamping cylinders are arranged on the base and are uniformly distributed on the outer side of the working disc;

annular clamping grooves are formed in the outer sides of the working discs, clamping blocks are respectively arranged at the front ends of telescopic rods of the clamping oil cylinders, and when the telescopic rods of the clamping oil cylinders extend out, the clamping blocks are abutted to the clamping grooves so as to clamp and fix the working discs.

4. The large-scale post insulator bending and twisting compound testing machine according to claim 2, wherein the outer ring of the slewing bearing is provided with gear teeth, the output end of the rotary driving mechanism is provided with a driving gear, and the driving gear is meshed with the gear teeth of the outer ring of the slewing bearing for transmission.

5. The large-sized post insulator bending and twisting composite testing machine according to claim 1, wherein the frame body comprises a left side frame, a right side frame, a front frame and a rear frame, the left side frame and the right side frame are arranged in parallel and at intervals, the front ends of the left side frame and the right side frame are connected through the front frame, and the rear ends of the left side frame and the right side frame are connected through the rear frame;

two ends of the loading cross beam are respectively provided with a movable frame, the two movable frames are respectively arranged on the left side frame and the right side frame in a horizontal sliding manner, and two ends of the loading cross beam are respectively arranged on the two movable frames in a vertical sliding manner;

the two moving frames are respectively connected with the frame body in a transmission way through a first ball screw transmission mechanism, and the loading cross beam is respectively connected with the two moving frames in a transmission way through a second ball screw transmission mechanism.

6. The large-scale post insulator bending and twisting composite testing machine according to claim 5, wherein the two first ball screw transmission mechanisms are connected through a first synchronous transmission mechanism; the first synchronous transmission mechanism comprises a first servo motor, a first speed reducer, two first transmission rods and two first right-angle shaft speed reducers; the power output end of the first servo motor is connected with the power input end of the first speed reducer, the two power output ends of the first speed reducer are respectively connected with the first ends of the two first transmission rods, the second ends of the two first transmission rods are respectively connected with the power input ends of the two first right-angle shaft speed reducers, and the power output ends of the two first right-angle shaft speed reducers are respectively connected with the power input ends of the two first ball screw transmission mechanisms;

the two second ball screw transmission mechanisms are connected through a second synchronous transmission mechanism; the second synchronous transmission mechanism comprises a second servo motor, a second speed reducer, two second transmission rods and two second right angle shaft speed reducers; the power output end of the second servo motor is connected with the power input end of the second speed reducer, the two power output ends of the second speed reducer are respectively connected with the first ends of the two second transmission rods, the second ends of the two second transmission rods are respectively connected with the power input ends of the two second right angle shaft speed reducers, and the power output ends of the two second right angle shaft speed reducers are respectively connected with the power input ends of the two second ball screw transmission mechanisms.

7. The large-scale post insulator bending and twisting compound testing machine according to claim 1, wherein guide posts are respectively arranged on the inner sides of the two side brackets, guide wheel sets corresponding to the guide posts are respectively arranged on the two sides of the loading frame, each guide wheel set comprises two side guide wheels arranged at intervals and two inner guide wheels coaxially arranged, the two side guide wheels are respectively arranged on the front side and the rear side of the guide posts in a rolling mode, and the two inner guide wheels are arranged on the inner side surfaces of the guide posts in a rolling mode.

8. The large-scale post insulator bending and twisting compound testing machine according to claim 7, wherein locking vertical plates are further arranged on the inner sides of the two side brackets respectively, locking cylinder groups corresponding to the locking vertical plates are arranged on two sides of the loading frame respectively, each locking cylinder group comprises two oppositely arranged locking cylinders, and the two locking cylinders are arranged on the front side and the rear side of the locking vertical plates respectively; when the telescopic rods of the two locking cylinders of the locking cylinder group extend out, the front ends of the telescopic rods of the two locking cylinders are clamped and fixed on the locking vertical plate, so that the movement of the loading frame is limited.

9. The large-scale post insulator bending and twisting composite testing machine according to claim 1, wherein the lifting driving mechanism comprises a motor speed reducer group, two first connecting rods, two third right angle shaft speed reducers, two second connecting rods, a plurality of first chain wheels, a plurality of second chain wheels, a plurality of chains and a plurality of lifting weights; wherein,,

steel wire rope sliding wheels are symmetrically arranged on two sides of the top of the steel structure frame respectively, steel wire ropes are connected to two sides of the loading frame respectively, one end of each steel wire rope is connected with the top of the loading frame, and the other end of each steel wire rope bypasses the corresponding steel wire rope sliding wheel and is connected with the balancing weight;

the motor speed reducer unit is arranged in the middle of the upper cover plate, the power output ends of the motor speed reducer unit are respectively connected with the first ends of the two first connecting rods, the second ends of the two first connecting rods are respectively connected with the power input ends of the two third right angle shaft speed reducers, the power output ends of the two third right angle shaft speed reducers are respectively connected with the two second connecting rods, and the two second connecting rods are respectively arranged on two sides of the upper cover plate in a rotating mode;

And a plurality of first chain wheels are coaxially and fixedly arranged on each second connecting rod, a plurality of second chain wheels are correspondingly arranged on the upper cover plate at the outer side of each second connecting rod, the first ends of a plurality of chains are respectively connected with the two sides of the top of the loading frame, and the second ends of the chains are respectively connected with lifting weights after respectively and sequentially bypassing the corresponding first chain wheels and the second chain wheels.

10. The large post insulator bend torsion composite testing machine according to any one of claims 1-9, further comprising a specimen crane mounted on top of the steel structure frame.

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