Tension test system for hollow insulator

Abstract

The invention relates to a tension test system for a hollow insulator. The tension test system comprises a test base; the clamping unit is arranged in the test base and comprises clamping assemblies which are distributed in the test base up and down and are respectively used for clamping the hollow insulator; the tension unit is arranged in the test base and is used for applying upward tension to the hollow insulator; the positioning adjusting unit is installed in the testing base and comprises positioning adjusting assemblies which are arranged in the testing base up and down, and the two positioning adjusting assemblies are matched with the two clamping assemblies in a one-to-one correspondence mode; the positioning and adjusting device is used for positioning and adjusting the positions between the clamping assembly and three flange connecting bases of the hollow insulator. According to the testing system, through cooperation of the clamping unit, the tension unit and the positioning adjusting unit, automatic positioning and clamping of the hollow insulator are achieved, manual alignment operation is reduced, the manual labor intensity is reduced, and a good foundation is provided for subsequent full-automatic tension testing.

Description

Technical Field

[0001] The present invention relates to the field of insulator testing, and particularly to a tensile testing system for hollow insulators. Background Art

[0002] Hollow insulators generally include an insulating cylinder, umbrella skirts wrapped around the outside of the insulating cylinder, and flanges connected to both ends of the insulating cylinder. Hollow insulators can be used as support and electrical insulation components in power station bus supports, disconnectors, smoothing reactors, transmission line cross arms and other power transmission and transformation equipment.

[0003] As a support member, the mechanical strength of a hollow insulator directly affects the mechanical performance of the equipment. Therefore, during the processing of hollow insulators, tensile tests need to be carried out on the hollow insulators to ensure their mechanical performance. Currently, when the existing tensile testing machines test hollow insulators, due to the limitations of the structure of the hollow insulators themselves, the flange structures on both sides are not a single flat structure, but a three-dimensional structure as shown in Figure 1 It includes a hollow cylindrical flange plate body and three flange connecting seats distributed in a triangular pattern. When fixing such a flange structure between the hollow insulator and the tensile testing machine, it is necessary to clamp and fix the clamping jaws of the tensile testing machine with the three flange connecting seats of the flange. Generally, the matching clamping jaws used are three-jaw clamping jaws corresponding to the three flange connecting seats one by one. This results in the need for manual alignment of the three-jaw chuck with the three flange connecting seats of the flange before clamping can be carried out to achieve feeding, which is very troublesome. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tensile testing system for hollow insulators that facilitates tensile testing of hollow insulators.

[0005] To solve the above technical problem, the technical solution of the present invention is: a tensile testing system for hollow insulators, where the hollow insulator includes an insulating cylinder, umbrella skirts wrapped around the outside of the insulating cylinder, and flanges connected to both ends of the insulating cylinder. The flange includes a hollow cylindrical flange plate body, and three flange connecting seats distributed in a triangular pattern are provided at the end of the flange plate body. Flange fixing holes are opened on the flange connecting seats. The innovation lies in that the tensile testing system includes a test base; a clamping unit installed in the test base, the clamping unit includes clamping components distributed up and down in the test base, respectively used to clamp the upper and lower sides of the hollow insulator; a tensile unit installed in the test base, used to apply an upward tensile force to the hollow insulator; A positioning and adjustment unit installed inside a test base. The positioning and adjustment unit includes a positioning and adjustment component disposed inside the test base, and the positioning and adjustment component corresponds and cooperates with a clamping component located on the upper side respectively, for positioning and adjusting the positions between the clamping component located on the upper side and three flange connection seats of the hollow insulator.

[0006] Further, the test base includes a base, side plates vertically arranged on the base, and a top plate connected to the top ends of the side plates, and one of the side plates is a hinged opening and closing door structure; The clamping component includes a clamping disc and clamping jaws installed on the clamping disc. There are three clamping jaws in total, which are distributed in a triangular pattern on the clamping disc and respectively correspond one-to-one to the three flange connection seats of the flange disc body. The clamping jaws are hinged to the clamping disc, and the three clamping jaws are driven by a swinging mechanism installed on the clamping disc to swing synchronously, realizing the clamping or loosening of the flange of the hollow insulator; Define the clamping disc in the clamping component located on the upper side as the upper clamping disc, and the clamping disc in the clamping component located on the lower side as the lower clamping disc; The tension unit includes a tension oil cylinder installed upside down inside the test base. The piston rod of the tension oil cylinder is connected to the upper clamping disc and drives the upper clamping disc to move up and down, thereby applying an upward tension to the hollow insulator; The positioning and adjustment component includes a positioning rod, an adjustment motor, and a torque sensor. The positioning rod is vertically arranged beside the upper clamping disc and is driven by a positioning cylinder to approach or move away from the upper clamping disc. The upper clamping disc is driven by the adjustment motor to rotate, and a torque sensor for detecting the torque of the output shaft of the adjustment motor is also arranged on the adjustment motor.

[0007] Further, the hinged cooperation between the clamping jaw and the clamping disc is as follows: A clamping jaw mounting seat for mounting the clamping jaw is also arranged on the outer wall of the clamping disc. The clamping jaw is an L-shaped structure jointly connected by a vertical block and a horizontal block. Among them, the middle position of the vertical block is hinged to the clamping jaw mounting seat, the upper side of the vertical block is connected to the swinging mechanism through the cooperation of a hinged swinging rod, and a gap for clamping the flange connection seat is left between the horizontal block and the clamping disc; The swinging mechanism is as follows: A rotating seat is installed inside the clamping disc. The rotating seat is movably connected to the clamping disc through the cooperation of bearings. A swinging channel matched with the swinging rod is opened inside the rotating seat. Define the two sides of the swinging channel as the first side and the second side respectively; In the horizontal direction, the swinging channel is an arc-shaped channel, and the swinging channel gradually inclines towards the central axis direction of the rotating seat from the first side to the second side; In the vertical direction, the swinging channel is an arc-shaped channel, and the swinging channel gradually inclines towards the horizontal block of the clamping jaw from the first side to the second side; One side of the swing rod is hinged to the vertical block, and the other side extends into the swing channel. A spherical embedding section is also provided on the side of the swing rod extending into the swing channel, and the size of the embedding section is larger than that of the swing rod. An opening for the swing rod to extend into and move is also formed on the rotating seat. The opening is communicated with the swing channel, and the size of the opening is larger than that of the swing rod and smaller than that of the embedding section. The rotating seat is driven by a rotating motor to rotate and drive the three jaws to swing synchronously, so as to clamp or loosen the flange of the hollow insulator.

[0008] Furthermore, a tension spring is also arranged between the jaw and the clamping disc. One side of the tension spring is connected to the clamping disc, and the other side is connected to the vertical block of the jaw. The connection point of the tension spring and the vertical block is located between the hinge point of the vertical block and the jaw mounting seat and the connection point of the vertical block and the horizontal block.

[0009] Furthermore, the upper clamping disc is installed in the test base through the cooperation of a lifting seat. A pair of lifting guide rails are also installed on the inner walls of two side plates of the test base. Lifting sliders used in cooperation with the lifting guide rails are installed on both sides of the lifting seat. The upper clamping disc is installed at the bottom end of the lifting seat. The top end of the lifting seat is connected to the piston rod of the tension oil cylinder and drives the upper clamping disc to move up and down.

[0010] Furthermore, parallel horizontal guide rails are also installed on the base and extend outside the test base. The lower clamping disc is installed on a lower sliding seat. A horizontal slider used in cooperation with the horizontal guide rails is installed at the bottom end of the lower sliding seat. The lower sliding seat is pulled by a horizontal air cylinder to reciprocate along the horizontal guide rails, thereby driving the lower clamping disc to enter and exit the test base.

[0011] Furthermore, a grid-shaped protective net is also arranged outside the test base.

[0012] The advantages of the present invention are as follows: The test system of the present invention realizes the automatic positioning and clamping of the hollow insulator through the cooperation among the clamping unit, the tension unit, and the positioning and adjustment unit, reduces the operation of manual alignment, reduces the manual labor intensity, and provides a good foundation for the subsequent realization of fully automatic tension testing.

[0013] The design of the positioning and adjustment assembly, through the cooperation of components such as the positioning rod, the adjustment motor, and the torque sensor, realizes the rotation of the upper clamping disc through the adjustment motor, and then realizes the change of the positions of the three jaws. Then, through the cooperation of the positioning rod and the torque sensor, it is determined whether the upper clamping disc rotates in place, providing a good foundation for the subsequent realization of automatic clamping.

[0014] For the lifting guide rails and lifting seats provided inside the test base, when the upper clamping chuck moves up and down, it plays a role of guiding and limiting the upper clamping chuck, avoiding the phenomenon of the upper clamping chuck running off track. On the other hand, it also plays a role of stable force application during the tensile test, ensuring that a stable upward pulling force can be applied to the hollow insulator and ensuring the smooth progress of the tensile test.

[0015] Through the cooperation of components such as the horizontal guide rail and sliding seat provided on the base, during the loading and unloading process, the lower clamping chuck can be pulled out from the test base, providing a larger space to realize the loading and unloading of the hollow insulator, without being limited to the internal space of the test base, facilitating the loading and unloading of the hollow insulator.

[0016] For the protective net provided outside the test base, it plays a certain protective role during the test, avoiding the phenomenon of the flange and the insulating cylinder bursting open during the tensile test, which may lead to safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the hollow insulator.

[0018] Figure 2 It is a schematic diagram of the tensile test system for the hollow insulator of the present invention.

[0019] Figure 3 It is a schematic diagram of the clamping assembly of the present invention.

[0020] Figure 4 It is a schematic diagram of the cooperation between the rotating seat and the swing rod of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0022] As Figure 1 shown, a kind of hollow insulator includes an insulating cylinder 1, umbrella skirts 11 coated outside the insulating cylinder 1, and flanges connected to both ends of the insulating cylinder 1. The flange includes a hollow cylindrical flange plate main body 12. One end of the flange plate main body 12 is fixedly sleeved with the insulating cylinder 1, and the other end of the flange plate main body 12 is also provided with three flange connection seats 13 distributed in a triangular pattern, and flange fixing holes are opened on the flange connection seats 13.

[0023] As Figures 2 - 4 shown, a kind of tensile test system for hollow insulators includes A test base, the test base includes a base 2, side plates 21 vertically arranged on the base 2, and a top plate 22 connected to the top of the side plates 21. There are a total of four side plates 21, and one of the side plates 21 is a hinged opening and closing door structure to facilitate the loading and unloading of hollow insulators. The base 2, side plates 21, and top plate 22 are jointly connected to form a test base with a hollow cuboid structure.

[0024] A grid-shaped protective net 23 is also arranged on the outer side of the test base. For the protective net 23 arranged on the outer side of the test base, it plays a certain protective role during the test process to avoid the phenomenon of the flange and the insulating cylinder bursting open during the tensile test, resulting in safety accidents.

[0025] A clamping unit installed in the test base, the clamping unit includes clamping components distributed up and down in the test base, respectively used to clamp the upper and lower sides of the hollow insulator.

[0026] As Figure 3 It can be seen from the schematic diagram shown that the clamping component includes a clamping disk 3 and clamping jaws installed on the clamping disk 3. The clamping disk 3 is a disc structure. There are a total of three clamping jaws, which are distributed in a triangular shape on the clamping disk 3 and respectively correspond to the three flange connection seats 13 of the flange disk main body 12 one by one. The clamping jaws are hinged to the clamping disk 3, and the three clamping jaws are driven by a swinging mechanism installed on the clamping disk 3 to swing synchronously to clamp or release the flange of the hollow insulator.

[0027] Define the clamping disk in the upper clamping component as the upper clamping disk, and the clamping disk in the lower clamping component as the lower clamping disk, and the upper clamping disk and the lower clamping disk are arranged oppositely.

[0028] The hinged cooperation between the clamping jaw and the clamping disk 3 is as follows: On the outer wall of the clamping disk 3, there is also a clamping jaw mounting seat 31 for installing the clamping jaw. The clamping jaw mounting seat 31 is jointly composed of two relatively arranged L-shaped blocks. The L-shaped blocks are fixed on the outer wall of the clamping disk 3 through the cooperation of bolts. There is a gap for installing the clamping jaw between the two L-shaped blocks. The clamping jaw is an L-shaped structure jointly connected by a vertical block 32 and a horizontal block 33. Among them, the middle position of the vertical block 32 is hinged to the clamping jaw mounting seat 31 through the cooperation of a pin shaft. A through hole for the pin shaft to pass through is opened on the vertical block 32, and through holes for the pin shaft to pass through are also opened on the two L-shaped blocks of the clamping jaw mounting seat 31. After placing the vertical block 32 in the gap between the two L-shaped blocks, align the through hole on the vertical block 32 with the through hole on the L-shaped block, and then pass the pin shaft through each through hole in turn, thus realizing the hinge between the vertical block 32 and the clamping jaw mounting seat 31. The upper side of the vertical block 32 is connected to the swinging mechanism through the cooperation of a hinged swinging rod 34. There is a gap for clamping the flange connection seat 13 between the horizontal block 33 and the clamping disk 3.

[0029] The swing mechanism is as follows: A rotating seat 35 is installed in the clamping disk 3. The rotating seat 35 is also a disk structure. The rotating seat 35 is movably connected to the clamping disk 3 through the cooperation of bearings 36, so as to realize the free rotation of the rotating seat 35 relative to the clamping disk 3. A groove for the rotating seat 35 to be embedded and installed is opened at one bottom edge position of the clamping disk 3, and the diameter of the groove is larger than the diameter of the rotating seat 35. After the rotating seat 35 is embedded in the groove, two bearings 36 distributed up and down are sleeved on the outer wall of the rotating seat 35, and the outer wall of the bearing 36 is attached to the inner wall of the groove, so as to realize the installation of the rotating seat 35. The groove in the upper clamping disk is opened at the upper bottom edge of the clamping disk 3, and the groove in the lower clamping disk is opened at the lower bottom edge of the clamping disk 3.

[0030] As Figure 4 It can be seen from the schematic diagram shown that a swing channel 37 matched with the swing rod 34 is opened in the rotating seat 35. The cross-section of the swing channel 37 is circular. The two sides of the swing channel 37 are defined as the first side and the second side respectively.

[0031] In the horizontal direction, the swing channel 37 is an arc-shaped channel, and the swing channel 37 gradually inclines towards the central axis direction of the rotating seat 35 from the first side to the second side.

[0032] In the vertical direction, the swing channel 37 is an arc-shaped channel, and the swing channel 37 gradually inclines towards the horizontal block of the clamping jaw from the first side to the second side. That is, the swing channel 37 in the clamping assembly located on the upper side gradually inclines downwards from the first side to the second side, while the swing channel 37 in the clamping assembly located on the lower side gradually inclines upwards from the first side to the second side.

[0033] One side of the swing rod 34 is hinged to the vertical block 32. The other side of the swing rod 34 passes through the clamping disc 3 and extends into the swing channel 37 inside the rotating seat 35. A through hole for the swing rod 34 to pass through and move is also provided in the clamping disc 3, and the size of this through hole is larger than that of the swing rod 34, so that the swing rod 34 can swing better in any direction. A spherical embedding section 38 is also provided on the side of the swing rod 34 extending into the swing channel 37, and the size of the embedding section 38 is larger than that of the swing rod 34. The diameter of the embedding section 38 is smaller than the diameter of the swing channel 37. An opening for the swing rod 34 to extend into and move is also provided on the rotating seat 35. The opening is connected to the swing channel 37, and the size of the opening is larger than that of the swing rod 34 and smaller than that of the embedding section 38. The control of the size of the opening is to prevent the swing rod 34 from detaching from the rotating seat 35 during the subsequent swinging of the swing rod 34, ensuring that the swing rod 34 can drive the clamping jaw to swing well. For the spherical embedding section 38 designed at the end of the swing rod 34, when the embedding section 38 cooperates with the swing channel 37, a point-to-point or point-to-surface contact method is adopted to prevent the embedding section 38 from getting stuck when sliding in the swing channel 37, ensuring the smooth movement of the swing rod 34.

[0034] The rotating seat 35 is driven by a rotating motor 301 to rotate and drive the three clamping jaws to swing synchronously, realizing the clamping or loosening of the flange of the hollow insulator. The rotating motor 39 is installed on the clamping disc 3 through the cooperation of the motor mounting seat 302.

[0035] A tension spring 39 is also provided between the clamping jaw and the clamping disc 3. One side of the tension spring 39 is connected to the clamping disc 3, and the other side of the tension spring 39 is connected to the vertical block 32 of the clamping jaw. And the connection point of the tension spring 39 and the vertical block 32 is located between the hinge point of the vertical block 32 and the clamping jaw mounting seat 31 and the connection point of the vertical block 32 and the horizontal block 33. That is, in the upper clamping assembly, the connection point of the tension spring 39 and the vertical block 32 is below the hinge point of the vertical block 32 and the clamping jaw mounting seat 31, while in the lower clamping assembly, the connection point of the tension spring 39 and the vertical block 32 is above the hinge point of the vertical block 32 and the clamping jaw mounting seat 31.

[0036] A tension unit installed in the test base is used to apply an upward tension to the hollow insulator.

[0037] The tension unit includes a tension oil cylinder 4 installed upside down in the test base. The piston rod of the tension oil cylinder 4 is connected to the upper clamping disc and drives the upper clamping disc to move up and down, thereby applying an upward tension to the hollow insulator.

[0038] Specifically, the upper clamping disc is installed in the test base through the cooperation of a lifting seat 41. The lifting seat 41 is a horizontal plate. A pair of lifting guide rails 42 are also installed on the inner walls of two of the side plates 21 of the test base. Lifting sliders 43 that cooperate with the lifting guide rails 42 are installed on both sides of the lifting seat 41. The upper clamping disc is installed at the bottom end of the lifting seat 41. The top end of the lifting seat 41 is connected to the piston rod of the tension oil cylinder 4 and drives the upper clamping disc to move up and down. For the lifting guide rails 42 and the lifting seat 41 provided in the test base, when the upper clamping disc moves up and down, they play a role in guiding and limiting the upper clamping disc, preventing the upper clamping disc from running off. On the other hand, they also play a role in stable force application during the tensile test, ensuring that a stable upward tension can be applied to the hollow insulator and ensuring the smooth progress of the tensile test.

[0039] A positioning and adjusting assembly installed in the test base, the positioning and adjusting assembly corresponds and cooperates with the clamping assembly located on the upper side, and is used to realize the positioning and adjustment of the position between the clamping assembly located on the upper side and the three flange connection seats 13 of the hollow insulator.

[0040] The positioning and adjusting assembly includes a positioning rod 5, an adjusting motor 51, a controller, and a torque sensor. The positioning rod 5 is vertically arranged beside the upper clamping disc and is driven by a positioning cylinder 52 to approach or move away from the upper clamping disc. The positioning cylinder 52 is installed on the side plate 21. The upper clamping disc is driven by the adjusting motor 51 to rotate. A torque sensor for detecting the torque of the output shaft of the adjusting motor 51 is also arranged on the adjusting motor 51. The data detected by the torque sensor is transmitted to the controller, and the controller controls whether the adjusting motor 51 needs to continue rotating. The design of the positioning and adjusting assembly uses the cooperation of components such as the positioning rod 5, the adjusting motor, and the torque sensor. The rotation of the upper clamping disc is realized through the adjusting motor, and then the position change of the three jaws is realized. The cooperation of the positioning rod and the torque sensor is used to determine whether the upper clamping disc rotates in place, providing a good foundation for subsequent automatic clamping.

[0041] Specifically, the fixation between the adjusting motor 51, the lifting seat 41, and the rotating motor 301 is as follows: The adjusting motor 51 is directly fixed on the bottom surface of the lifting seat 41. An intermediate bracket 44 is also arranged above the rotating motor 301. The bottom end of the intermediate bracket 44 is fixed to the motor mounting seat 302, and the top end of the intermediate bracket 44 is connected to the adjusting motor 51 and is driven by the adjusting motor 51 to rotate, thereby realizing the rotation of the upper clamping disc.

[0042] On the base 2, there are also horizontally arranged guide rails 6 distributed side by side, and the horizontally arranged guide rails 6 extend out of the test base. The lower clamping plate is mounted on a lower sliding seat 61. At the bottom end of the lower sliding seat 61, there is a horizontal slider that cooperates with the horizontally arranged guide rails 6. And the lower sliding seat 61 is pulled by a horizontal air cylinder to reciprocate along the horizontally arranged guide rails, thereby driving the lower clamping plate to move in and out of the test base. At the same time, there is also a gap left at the bottom end of the corresponding side plate 22 to allow the horizontally arranged guide rails 6 to extend out. Since the lower clamping plate is mounted on the lower sliding seat 61, therefore, the rotating motor 301 in the clamping assembly on the lower side can be directly mounted on the lower sliding seat 61, instead of being mounted on the clamping plate 3 through the motor mounting seat 302. Through the cooperation of components such as the horizontally arranged guide rails 6 and the lower sliding seat 61 provided on the base 2, during the loading and unloading process, the lower clamping plate can be pulled out of the test base, and there is more space to realize the loading and unloading of the hollow insulator, without being limited to the internal space of the test base, which facilitates the loading and unloading of the hollow insulator.

[0043] Working principle: When performing a tensile test on the hollow insulator, first, open the side plate 22 serving as the opening and closing door. Then, the lower clamping plate is pulled out of the test base by the horizontal air cylinder. At this time, the hollow insulator is manually placed on the lower clamping plate, and the three flange connection seats 13 on the lower flange of the hollow insulator are aligned with the three clamping jaws on the lower clamping plate. Then, the rotating motor 301 on the lower clamping plate works to drive the three clamping jaws on the lower clamping plate to swing synchronously, realizing the clamping and fixing of the lower flange of the hollow insulator. Then, the lower clamping plate is pushed into the test base by the horizontal air cylinder, and the side plate 22 serving as the opening and closing door is closed.

[0044] After the lower clamping plate moves into place, the positioning rod 5 approaches the upper flange under the drive of the positioning air cylinder 52. Then, the adjustment motor 51 works to drive the upper flange to rotate, and further realizes the rotation of the clamping jaws on the upper flange. When one of the clamping jaws abuts against the positioning rod 5, as the adjustment motor 51 continues to rotate, the torque sensor will detect that the torque of the output shaft of the adjustment motor 51 changes. At this time, the controller controls the adjustment motor 51 to stop rotating. At this time, the position positioning between the three clamping jaws on the upper clamping plate and the three flange connection seats 13 on the upper flange of the hollow insulator is completed. Then, the rotating motor 301 on the upper clamping plate works to drive the three clamping jaws on the upper clamping plate to swing synchronously, realizing the clamping and fixing of the upper flange of the hollow insulator. At this time, the clamping of the hollow insulator is completed.

[0045] Finally, the tensile oil cylinder 4 acts to drive the upper clamping plate to move upward, thereby performing a tensile test on the hollow insulator.

[0046] In the test system of the present invention, when loading the hollow insulator, since it is necessary for manual operation to place the hollow insulator on the lower clamping plate, positioning placement between the hollow insulator and the lower clamping plate can be achieved during loading, that is, the positions of the lower clamping plate and the hollow insulator after clamping are fixed. Therefore, there is no need to set a positioning and adjusting component to adjust the position at the clamping component on the lower side. When the clamping component on the upper side performs clamping, it is necessary to move the hollow insulator into the test base before clamping. At this time, it is necessary to adjust the relative position between the clamping component on the upper side and the hollow insulator, that is, it is necessary to adjust and position the positions of the three jaws and the three flange connection seats 13 on the upper flange of the hollow insulator by rotating the upper clamping plate. Therefore, only a positioning and adjusting component needs to be set beside the clamping component on the upper side for adjustment. During adjustment, since the position of the hollow insulator is fixed, one of the flange connection seats 13 on the upper flange of the hollow insulator can be used as a reference for position adjustment. Based on this, the position of the positioning rod 5 can be determined, and then the rotation of the upper clamping plate can be achieved through the position of the positioning rod 5 and the position can be fixed, thus realizing the positioning clamping between the three jaws on the upper clamping plate and the three flange connection seats 13 on the upper flange of the hollow insulator.

[0047] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A tensile test system for a hollow insulator. The hollow insulator includes an insulating cylinder, umbrella skirts wrapped outside the insulating cylinder, and flanges connected to both ends of the insulating cylinder. The flange includes a flange disc body in the shape of a hollow cylinder. At the end of the flange disc body, three flange connection seats distributed in a triangular pattern are further provided. Flange fixing holes are formed in the flange connection seats. It is characterized in that: The tensile test system includes a test base; a clamping unit installed in the test base, the clamping unit includes clamping components distributed up and down in the test base, which are respectively used to clamp the upper and lower sides of the hollow insulator; a tensile force unit installed in the test base, which is used to apply an upward tensile force to the hollow insulator; a positioning and adjusting unit installed in the test base, the positioning and adjusting unit includes a positioning and adjusting component arranged in the test base, and the positioning and adjusting component corresponds and cooperates with the clamping component on the upper side respectively, and is used to realize the positioning and adjustment of the position between the clamping component on the upper side and the three flange connection seats of the hollow insulator.

2. The tensile test system for a hollow insulator according to claim 1, wherein: The test base includes a base, side plates vertically arranged on the base, and a top plate connected to the top of the side plates, and one of the side plates is a hinged opening and closing door structure; The clamping component includes a clamping disc and clamping jaws installed on the clamping disc. There are three clamping jaws in total, which are distributed in a triangular shape on the clamping disc and respectively correspond to the three flange connection seats of the flange disc body one by one. The clamping jaws are hinged to the clamping disc, and the three clamping jaws are driven by a swinging mechanism installed on the clamping disc to swing synchronously to clamp or loosen the flange of the hollow insulator; Define the clamping disc in the clamping component on the upper side as the upper clamping disc, and the clamping disc in the clamping component on the lower side as the lower clamping disc; The tensile force unit includes a tensile oil cylinder installed upside down in the test base. The piston rod of the tensile oil cylinder is connected to the upper clamping disc and drives the upper clamping disc to move up and down, so as to apply an upward tensile force to the hollow insulator; The positioning and adjusting component includes a positioning rod, an adjusting motor and a torque sensor. The positioning rod is vertically arranged beside the upper clamping disc and is driven by a positioning cylinder to approach or move away from the upper clamping disc. The upper clamping disc is driven by the adjusting motor to rotate, and a torque sensor for detecting the torque of the output shaft of the adjusting motor is also arranged on the adjusting motor.

3. The tensile test system for hollow insulators according to claim 2, wherein: The hinged cooperation between the clamping jaw and the clamping disc is as follows: a clamping jaw mounting seat for mounting the clamping jaw is also arranged on the outer wall of the clamping disc. The clamping jaw is an L-shaped structure jointly connected by a vertical block and a horizontal block. Among them, the middle position of the vertical block is hinged to the clamping jaw mounting seat, the upper side of the vertical block is connected to the swinging mechanism through the cooperation of a hinged swinging rod, and a gap for clamping the flange connection seat is left between the horizontal block and the clamping disc; The swinging mechanism is as follows: a rotating seat is installed in the clamping disc. The rotating seat is movably connected to the clamping disc through the cooperation of bearings. A swinging channel matched with the swinging rod is opened in the rotating seat. Define the two sides of the swinging channel as the first side and the second side respectively; In the horizontal direction, the swinging channel is an arc-shaped channel, and the swinging channel gradually inclines towards the central axis direction of the rotating seat from the first side to the second side; In the vertical direction, the swinging channel is an arc-shaped channel, and the swinging channel gradually inclines towards the horizontal block of the clamping jaw from the first side to the second side; One side of the swing rod is hinged to the vertical block, and the other side extends into the swing channel. A spherical embedding section is provided on the side of the swing rod extending into the swing channel, and the size of the embedding section is larger than that of the swing rod. An opening for the swing rod to extend into and move is also formed on the rotating seat. The opening is communicated with the swing channel, and the size of the opening is larger than that of the swing rod and smaller than that of the embedding section. The rotating seat is driven by a rotating motor to rotate and drive the three jaws to swing synchronously, so as to clamp or release the flange of the hollow insulator.

4. The tensile test system for hollow insulators according to claim 3, characterized in that: A tension spring is further arranged between the jaw and the clamping disc. One side of the tension spring is connected to the clamping disc, and the other side is connected to the vertical block of the jaw. The connection point of the tension spring and the vertical block is located between the hinge point of the vertical block and the jaw mounting seat and the connection point of the vertical block and the horizontal block.

5. The tensile test system for hollow insulators according to claim 2, characterized in that: The upper clamping disc is installed in the test base through the cooperation of a lifting seat. A pair of lifting guide rails are also installed on the inner walls of two side plates of the test base. Lifting sliders used in cooperation with the lifting guide rails are installed on both sides of the lifting seat. The upper clamping disc is installed at the bottom end of the lifting seat. The top end of the lifting seat is connected to the piston rod of the tension oil cylinder and drives the upper clamping disc to move up and down.

6. The tensile test system for hollow insulators according to claim 2, wherein: Parallel horizontal guide rails are also installed on the base, and the horizontal guide rails extend out of the test base. The lower clamping disc is installed on a lower sliding seat. A horizontal slider used in cooperation with the horizontal guide rails is installed at the bottom end of the lower sliding seat. The lower sliding seat is pulled by a horizontal air cylinder to reciprocate along the horizontal guide rails, so as to drive the lower clamping disc to enter and exit the test base.

7. The tensile test system for hollow insulators according to claim 1, characterized in that: A grid-shaped protective net is also arranged outside the test base.

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