Torsion test tool for three-post insulator

Abstract

The utility model relates to the field of testing the strength characteristic of a solid material by applying stable torsion, in particular to a torsion test tool for a three-post insulator. The three-post insulator test tool comprises a workbench, the workbench is provided with a fixing structure used for fixing a three-post insulator and keeping the axis of the three-post insulator horizontal, the workbench is further provided with a fixed pulley, and the test tool further comprises a torsion bar used for being installed in a center through hole of the three-post insulator in a rotation stopping and penetrating mode. A torsion bar is vertically installed on the torsion bar, one end of the torsion bar is used for hanging a weight, and the other end of the torsion bar is connected with a hanging rope which bypasses the fixed pulley and is used for hanging the weight. The torsion test tool can be used for applying a couple, the torsion test tool is simple and easy to implement, the couple applied by the tool is stable and can be kept for a certain time, and the detection structure can be more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of applying stable torsion to test solid material strength characteristics, especially to a three -legged insulator anti -twist test frock. BACKGROUND

[0002] A large number of three-legged insulators are used in gas insulated transmission line (GIL), and the three-legged insulator is used to support high-voltage conductors and maintain the insulation of the high-voltage conductor part and the low-voltage shell part, and a Chinese invention patent application with the application publication number CN111145969A discloses a three-legged insulator of GIL, which comprises a center cylinder arranged at the center position and three legs arranged along the circumferential direction of the outer cylinder wall of the center cylinder, and the end of the three legs is provided with a metal insert, and each metal insert is provided with an internal threaded hole, and the inner hole of the center cylinder forms a central through hole for the high-voltage conducting rod in the GIL to pass through.

[0003] The three-legged insulator is a core component in the GIL, and bears mechanical stresses such as bending resistance and torsion resistance during installation or long-term operation, and its mechanical properties are crucial for the long-term stable operation of the GIL, so it is necessary to conduct anti-torsion experiments on the three-legged insulator to verify whether its mechanical properties meet the requirements.

[0004] A Chinese invention patent with the authorized announcement number CN104034605B discloses an insulator anti-torsion device, which comprises a fixing structure for fixing the insulator and keeping its axis horizontal, and a spline shaft and a force arm rod, the force arm rod comprises a force applying end and a mounting end, one end of the spline shaft is mounted in the spline shaft hole at one end of the insulator, and the other end is mounted in the spline shaft hole at the assembly end of the force arm rod, then an external force is applied to the force applying end of the force arm rod in the direction of the torsion of the insulator, so as to achieve the purpose of testing the anti-torsion strength of the insulator. However, the object detected by the device is a rod-shaped insulator, and it is not suitable for the detection of the three-legged insulator, and even if the detection method is used, the three legs of the three-legged insulator are fixed, then the spline shaft is installed in the center cylinder to stop rotation and the torque is applied to the insulator through the force arm, and the torque applied by this method is not stable enough, it is difficult to ensure that the applied torque is stable for a certain period of time, and the detection result is not accurate enough. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a three -legged insulator anti -twist test frock, to solve the problem of the prior art anti -twist device is not applicable to three -legged insulator anti -twist detection.

[0006] In order to achieve the above-mentioned purpose, the three-legged insulator anti-torsion test frock of the utility model adopts the following technical scheme:

[0007] A torsion test fixture for a three-post insulator includes a workbench with a fixing structure for fixing the three-post insulator and keeping its axis horizontal. A fixed pulley is also installed on the workbench at a position higher than the center hole of the three-post insulator. The test fixture also includes a torsion bar inserted through the center hole of the three-post insulator to prevent rotation. A torsion bar is vertically installed on the torsion bar. One end of the torsion bar is used to suspend a weight, and the other end of the torsion bar is connected to a suspension rope that passes around the fixed pulley to suspend the weight.

[0008] Furthermore, the fixed pulley is positioned directly above the end of the torsion bar.

[0009] Furthermore, the workbench includes a mounting surface perpendicular to the horizontal plane and a top mounting surface perpendicular to the mounting surface. The fixing structure includes a support member on the mounting surface for fixing and supporting the legs of the three-post insulator. The support member has at least three sets. The support member has a connection structure for fixing and connecting with the end of the leg. The fixed pulley is mounted on the top mounting surface.

[0010] Furthermore, the workbench includes a support plate perpendicular to the horizontal plane and a mounting top plate and a support bottom plate extending vertically along both ends of the support plate. The support plate is detachably mounted with a mounting plate. The end face of the mounting plate away from the support plate is the mounting surface, and the bottom surface of the mounting top plate is the top mounting surface.

[0011] Furthermore, the support plate is provided with a T-shaped groove, and the mounting plate is provided with a T-shaped boss. The mounting plate is engaged with the T-shaped groove on the support plate by means of the T-shaped boss.

[0012] Furthermore, the support member includes two support rods arranged parallel to each other on the mounting plate and a fixing block fixed to the ends of the two support rods. The connecting structure is provided on the fixing block, and the connecting structure is a screw hole for screws to pass through to engage with the threaded ends of the legs of the three-post insulator.

[0013] Furthermore, the support rod is adjustablely mounted on the mounting surface of the mounting plate in the extending direction of the three-post insulator legs.

[0014] Furthermore, the mounting plate is provided with mounting holes, and at least three sets of mounting holes are arranged at radial intervals along the circumference of each support member.

[0015] Furthermore, the support rod includes a first threaded section at its first end and a first stepped surface at the end of the lower threaded section. The first stepped surface is used to block the mounting surface. The first threaded section passes through the mounting hole and is connected to a first nut.

[0016] Further, the support rod further comprises a second threaded segment arranged at the second end of the support rod, a second stepped surface is arranged below the second threaded segment, the second stepped surface is used for abutting against the bottom surface of the fixing block, a through hole is arranged on the fixing block, the second threaded segment passes through the through hole on the fixing block and is connected with a second nut.

[0017] Beneficial effects: the three-column insulator anti-torsion test tool is an opening practical creation, specifically, comprises a workbench, a fixing structure for fixing the three-column insulator and a fixed pulley for changing the force direction of the insulator are arranged on the workbench, the test device further comprises a torsion rod for rotation stopping and arranged in the central through hole of the three-column insulator, a torsion applying rod is vertically arranged on the torsion rod, one end of the torsion applying rod is used for suspending a weight, the other end of the torsion applying rod is connected with a suspension rope for suspending the weight and passing through the fixed pulley, the tool can be used for applying a couple of forces, when the test is carried out, the weight is suspended at one end of the torsion applying rod, the weight with the same mass is suspended at the end of the suspension rope passing through the fixed pulley at the other end of the torsion applying rod, the mass of the weight at both ends of the torsion applying rod is increased until the three-column insulator is damaged, the torque that can be borne by the three-column insulator can be calculated according to the length of the cantilever rod and the weight of the weight, the anti-torsion test tool is simple and easy to realize, the couple of forces applied by the tool is stable and can be maintained for a certain period of time, and the detection structure is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of an embodiment of the three-column insulator anti-torsion test tool of the utility model;

[0019] Figure 2 It is Figure 1 It is a side view of the three-column insulator anti-torsion test tool.

[0020] In the figure: 1, workbench;2, support vertical plate;21, installation vertical surface;22, mounting hole;23, mounting vertical plate;3, mounting top plate;31, top mounting surface;4, support;41, support rod;42, fixing block;5, fixed pulley;51, pulley support;6, torsion rod;7, torsion applying rod;8, suspension rope;9, weight;10, second nut;11, first nut;12, T-shaped boss;13, T-shaped groove;14, screw;15, support leg;16, support base plate. DETAILED DESCRIPTION

[0021] The utility model discloses a fixed structure is set up on the torsion test tool, and three -legged post insulator is fixed on the test tool, and the torsion bar for transmitting torque and stopping rotation is set up in the central perforation of three -legged post insulator, and the torsion bar is vertically provided with the torsion bar, and the test tool is also provided with the fixed pulley for changing the force direction and the suspension rope of one end being connected on the torsion bar and the other end bypassing the fixed pulley, and the test is carried out through setting up the weight known and identical weight on the end of the suspension rope and the end of the torsion bar not connecting the suspension rope, and the torque that three -legged post insulator bears can be obtained through the length of the torsion bar and the weight of the weight on one end, and the torque applied through the mode is stable and can last for a certain time.

[0022] Based on the above idea, the utility model discloses three -legged post insulator torsion test tool includes workbench 1, as Figures 1-2 Shown, workbench 1 is equipped with the fixed structure for fixing three -legged post insulator and making it keep axis horizontal, workbench 1 is also set up the fixed pulley 5 at the position higher than three -legged post insulator central perforation, and the test tool also includes the torsion bar 6 for stopping rotation and wearing three -legged post insulator central perforation, and the torsion bar 6 is vertically installed with the torsion bar 7, and one end of the torsion bar 7 is used for hanging the weight 9, and the other end of the torsion bar 7 is connected with the suspension rope 8 for suspending the weight 9 bypassing the fixed pulley 5.

[0023] Can only hang the weight 9 on one end of the torsion bar 7, can hang the weight 9 on the end of the torsion bar 7 not connecting the suspension rope 8, also can hang the weight 9 on the end of the suspension rope 8 on the other end of the torsion bar 7, then in this kind of working condition, the fixed pulley 5 can not be set up directly above the end of the torsion bar 7.

[0024] In order to be more in accord with actual loading working condition, preferably, the fixed pulley 5 is directly above the end of the torsion bar 7, then when carrying out the test, hang the weight 9 on one end of the torsion bar 7, hang the weight 9 of equal mass on the end of the suspension rope 8 bypassing the fixed pulley 5 on the other end of the torsion bar, and the suspension direction of the torsion bar 7 and the weight 9 is perpendicular, and the torsion bar 7 is equivalent to the force arm, and this loading mode realizes applying a pair of equal size, opposite direction couple to three -legged post insulator. Increase the weight 9 at the both ends of the torsion bar 7 until three -legged post insulator breaks down, calculate the torque according to the length of the cantilever bar 7 and the weight of the weight 9, thereby the torque that three -legged post insulator can bear is calculated, and the torsion test is completed.

[0025] The workbench 1 comprises a mounting vertical surface 21 arranged perpendicularly to the horizontal plane and a top mounting surface 31 arranged perpendicularly to the mounting vertical surface 21, and the fixing structure comprises a support 4 arranged on the mounting vertical surface 21 for fixing the support legs 15 of the three-column insulator, since each three-column insulator comprises three support legs 15, the support 4 is arranged in at least three groups, and the three groups of supports 4 are arranged on the same circle, and the support 4 is provided with a connecting structure for fixedly connecting with the end of the support leg 15. The fixed pulley 5 is arranged on the top mounting surface 31. In other embodiments, the workbench can also be a triangular support structure welded by support beams, and the three intersection points of the support structure correspond to the ends of the three support legs of the three-column insulator, and a fixing arm for fixedly connecting with the end of the support leg is arranged at the three intersection points of the support structure, and the connecting structure is arranged on the fixing arm, and one end of the fixing arm extends obliquely upward, and the fixed pulley is arranged on the extended section of the fixing arm.

[0026] The workbench 1 comprises a support vertical plate 2 arranged perpendicularly to the horizontal plane and a mounting top plate 3 and a support bottom plate 16 arranged perpendicularly to the ends of the support vertical plate 2, and the workbench 1 is the main support part of the entire test tool. Before the test starts, in order to make the installation of the three-column insulator more convenient, in a preferred embodiment, a mounting vertical plate 23 can be detachably arranged on the support vertical plate 2 of the workbench 1, and the end face of the mounting vertical plate 23 away from the support vertical plate 2 is the mounting vertical surface 21, and the bottom surface of the mounting top plate 3 is the top mounting surface 31. In other embodiments, the three support legs 15 of the three-column insulator can also be directly fixed to the support vertical plate 2, and the side surface of the support vertical plate 2 on the side where the mounting top plate 3 is arranged is the mounting vertical surface 21.

[0027] The support vertical plate 2 is provided with a T-shaped groove 13 arranged horizontally on the side surface of the support vertical plate 2, and the mounting vertical plate 23 is provided with a T-shaped boss 12 corresponding to the T-shaped groove 13. Before the three-column insulator is installed before the test, the three-column insulator can be first fixed to the mounting vertical plate 23, and then the mounting vertical plate 23 provided with the three-column insulator is clamped in the T-shaped groove 13 on the support vertical plate 2 through the T-shaped boss 12. In other embodiments, a screw rod can also be arranged on the support vertical plate 2, and the end of the screw rod is provided with an annular boss in abutting contact with the back side end face of the mounting vertical plate 23, and a corresponding fixing hole is reserved on the mounting vertical plate 23, and during installation, the end of the screw rod passes through the mounting vertical plate 23, the annular boss on the screw rod is in abutting contact with the back side end face of the mounting vertical plate 23, and the screw rod is fastened on the mounting vertical surface 21 side of the mounting vertical plate 23 through a nut.

[0028] The support 4 comprises two support rods 41 arranged parallel to each other on the mounting vertical plate 23 and a fixing block 42 fixed between the two support rods 41, and a connecting structure is arranged on the fixing block 42, which is a screw hole for the screw 14 to pass through and threadedly engage with the end of the leg 15 of the three-column insulator. In other embodiments, the support 4 can also be a fixed vertical plate, the lower end of which is fixed to the mounting vertical surface 21, and the connecting structure is arranged at the upper end of the fixed vertical plate.

[0029] The support 4 is mainly used to support the three legs of the three-column insulator, and since the lengths of the legs 15 of different three-column insulators are different, the fixed support positions of the support rods 41 of the support 4 are different for the legs 15 of different lengths, and therefore, in a preferred embodiment, the support rods 41 are adjustably mounted on the mounting vertical plate 23.

[0030] The mounting vertical plate 2 is provided with mounting holes 22, and at least three groups of mounting holes 22 are arranged along the radial direction of the circumferences of the support rods 41. Each group of mounting holes 22 is located on the same circumference and corresponds to one model of three-column insulator. Of course, in other embodiments, the mounting holes 22 can also be long holes along the radial direction of the circumferences of the support rods 4, and the support rods 41 are adjustably mounted on the mounting vertical plate 23 by moving the positions of the support rods in the long holes.

[0031] The support rod 41 comprises a lower threaded section arranged at one end thereof and a first stepped surface arranged above the first threaded section, the first stepped surface is used to abut against the mounting vertical surface 21, and the first threaded section passes through the mounting hole 22 and is connected with a first nut 11. In other embodiments, the support rod 41 can also be directly welded to the mounting vertical plate 23.

[0032] The support rod 41 further comprises a second threaded section at the other end thereof, and a second stepped surface is arranged below the second threaded section, the second stepped surface being used to abut against the bottom surface of the fixing block 42. The fixing block 42 is provided with a through hole, and the second threaded section passes through the through hole of the fixing block 42 and is connected with a second nut 10. When fixing the support leg 15, the support rod 41 is first installed on the installation vertical surface 21 of the support vertical plate 2, the second threaded section of the support rod 41 passes through the fixing block 42, and the second nut 10 sleeved on the second threaded section is preliminarily tightened. Then, the screw 14 passes through the screw through hole of the fixing block 42 and is screwed into the threaded hole at the end of the support leg 15, so as to fix the support leg 15 on the fixing block 42. Finally, the second nut 10 is tightened. In other embodiments, the support rod 41 can also be welded to the fixing block 42. In this case, when fixing the support leg 15, the lower threaded section of the support rod 41 passes through the installation hole 22 on the installation vertical plate 2, and the first nut 11 is preliminarily tightened. Then, the screw passes through the screw through hole of the fixing block 42 and is screwed into the threaded hole at the end of the support leg 15, so as to fix the support leg 15 on the fixing block 42. Finally, the first nut 11 on the lower threaded section of the support rod 41 is tightened.

[0033] The connecting structure on the fixing block 42 is a screw through hole for the screw to pass through and be screwed into the threaded hole at the end of the support leg of the three-column insulator. In other embodiments, if a threaded stud is arranged on the metal insert of the three-column insulator, the connecting structure is a threaded hole for screwing with the threaded stud.

[0034] In order to reduce the weight of the torsion rod 6 and make the torsion performance of the torsion rod 6 better, preferably, the torsion rod 6 is a hollow rod. Of course, in other embodiments, the torsion rod 6 can also use a solid rod with required torsion performance and light weight.

[0035] The above is only a preferred embodiment of the present application, and is not used to limit the present application. The patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A torsional resistance testing fixture for a three-post insulator, characterized in that, The test fixture includes a workbench with a fixing structure for fixing the three-post insulator and keeping its axis horizontal. A fixed pulley is also installed on the workbench at a position higher than the center hole of the three-post insulator. The test fixture also includes a torsion bar for preventing rotation, which is installed through the center hole of the three-post insulator. A torsion bar is vertically installed on the torsion bar. One end of the torsion bar is used to suspend a weight, and the other end of the torsion bar is connected to a suspension rope that passes around the fixed pulley to suspend the weight.

2. The torsional testing fixture for a three-post insulator according to claim 1, characterized in that, The fixed pulley is located directly above the end of the torsion bar.

3. The torsional testing fixture for a three-post insulator according to claim 2, characterized in that, The workbench includes an installation surface perpendicular to the horizontal plane and a top installation surface perpendicular to the installation surface. The fixing structure includes support members provided on the installation surface for fixing and supporting the legs of the three-post insulator. The support members are provided in at least three sets. The support members are provided with a connection structure for fixing and connecting with the end of the legs. The fixed pulley is installed on the top installation surface.

4. The torsional testing fixture for a three-post insulator according to claim 3, characterized in that, The workbench includes a support plate perpendicular to the horizontal plane and a mounting top plate and a support bottom plate extending perpendicularly from both ends of the support plate. The support plate is detachably mounted with a mounting plate. The end face of the mounting plate away from the support plate is the mounting surface, and the bottom surface of the mounting top plate is the top mounting surface.

5. The torsional testing fixture for a three-post insulator according to claim 4, characterized in that, The support plate is provided with a T-shaped groove, and the mounting plate is provided with a T-shaped boss. The mounting plate is engaged with the T-shaped groove on the support plate by means of the T-shaped boss.

6. The torsional testing fixture for a three-post insulator according to claim 5, characterized in that, The support includes two support rods arranged parallel to each other on the mounting plate and a fixing block fixed to the ends of the two support rods. The connecting structure is provided on the fixing block and is a screw hole for screws to pass through to engage with the threaded ends of the legs of the three-post insulator.

7. The torsional testing fixture for a three-post insulator according to claim 6, characterized in that, The support rod is adjustablely mounted on the mounting surface of the mounting plate in the extension direction of the three-post insulator leg.

8. The torsional testing fixture for a three-post insulator according to claim 7, characterized in that, The mounting plate is provided with mounting holes, and at least three sets of mounting holes are arranged at radial intervals along the circumference of each support member.

9. The torsional testing fixture for a three-post insulator according to claim 8, characterized in that, The support rod includes a first threaded section at its first end and a first stepped surface at the end of the lower threaded section. The first stepped surface is used to block the mounting surface. The first threaded section passes through the mounting hole and is connected to a first nut.

10. The torsional testing fixture for a three-post insulator according to any one of claims 6-8, characterized in that, The support rod also includes a second threaded section at its second end, and a second stepped surface is provided below the second threaded section. The second stepped surface is used to stop with the bottom surface of the fixing block. The fixing block is provided with a through hole, and the second threaded section passes through the through hole on the fixing block and is connected to a second nut.

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