Grounding clamp flexible anti-inversion device and design method thereof

Abstract

The application discloses a flexible anti-overturning device of a grounding clamp and a design method thereof, and relates to the technical field of power transmission line maintenance equipment. The device comprises a telescopic part, a counterweight and a mounting assembly. The telescopic part comprises multiple cylindrical extension parts which are connected in sequence through sliding and nesting. The outer diameter and the inner diameter of the multiple cylindrical extension parts decrease in sequence. The counterweight is arranged at the free end of the cylindrical extension part with the smallest outer diameter. The mounting assembly is used for fixing the cylindrical extension part with the largest inner diameter and the grounding clamp. The telescopic part with the counterweight increases the anti-overturning torque of the grounding clamp, reduces the interference of external force on the grounding clamp, and improves the accuracy of the identification and positioning of the grounding clamp by the unmanned aerial vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission line maintenance equipment, in particular to a flexible anti-overturning device for grounding clamp and a design method thereof. BACKGROUND

[0002] The grounding wire is an important technical measure to protect the power line maintenance personnel, but the traditional manual hanging and detaching of the grounding wire has many problems, such as high difficulty, high physical consumption of the high-altitude worker, high-altitude falling risk and low operation efficiency. With the development of unmanned aerial vehicle technology, it is possible to use unmanned aerial vehicles to replace manual hanging and detaching of the grounding wire, thereby improving the operation efficiency.

[0003] When the unmanned aerial vehicle is used to detach the grounding clamp to complete the operation of detaching the grounding wire, the posture of the grounding clamp needs to be recognized and positioned first, then connected with the specific part of the grounding clamp, and finally controlled to detach from the conductor.

[0004] However, when the grounding clamp is clamped on the conductor, it will inevitably be affected and disturbed by various external forces. These external forces mainly include the continuous wind force in the natural environment, the downward force of the connected grounding copper wire due to its own weight, and other unpredictable external forces. These complex external forces will cause the grounding clamp clamped firmly on the conductor to rotate and overturn to different degrees. Once the grounding clamp overturns, the unmanned aerial vehicle will not be able to accurately recognize and position the position of the overturned grounding clamp, and it will also be unable to safely and reliably remove it, which greatly reduces the work efficiency and increases the operation risk. SUMMARY

[0005] In view of the above-mentioned deficiencies of the related art, the present application provides a flexible anti-overturning device for grounding clamp and a design method thereof. On the one hand, the flexible anti-overturning device for grounding clamp of the present application increases the anti-overturning torque of the grounding clamp by loading the counterweight on the telescopic member, reduces the interference of external force on the grounding clamp, and improves the accuracy of the recognition and positioning of the grounding clamp by the unmanned aerial vehicle. On the other hand, the telescopic member loaded with the counterweight is composed of a plurality of nested telescopic members, which can flexibly bend under the action of external force, reducing the impact of external force on the grounding clamp, and improving the telescopic length per unit weight. Under the same weight, the grounding clamp is provided with greater anti-overturning torque, thereby improving the anti-overturning torque of the grounding clamp as much as possible under the condition of limited load of the unmanned aerial vehicle.

[0006] In a first aspect, the flexible anti-overturning device for grounding clamp provided by the present application adopts the following technical scheme:

[0007] A flexible anti-overturning device for grounding clamp, comprising:

[0008] The telescopic component includes a plurality of cylindrical extensions that are sequentially slidably nested together, wherein the outer diameter and inner diameter of the plurality of cylindrical extensions decrease sequentially.

[0009] A counterweight is disposed at the free end of the cylindrical extension with the smallest outer diameter;

[0010] And mounting components for securing the cylindrical extension with the largest inner diameter to the grounding clamp.

[0011] Preferably, a limiting ring is coaxially sleeved on the outer wall of one end of the cylindrical extension and a support ring is coaxially embedded on the inner wall of the other end, and the limiting ring of the cylindrical extension is in movable contact with the support ring of the adjacent cylindrical extension.

[0012] Preferably, the mounting assembly includes a positioning plate for connection with the grounding clamp and a fastening sleeve for clamping the outer diameter of the cylindrical extension with the largest inner diameter, the fastening sleeve being fixed to the positioning plate.

[0013] Preferably, a plurality of fastening sleeves are provided, and the plurality of fastening sleeves are distributed at intervals along the axial direction of the cylindrical extension.

[0014] Preferably, a connecting plate is vertically fixed on the positioning plate, and the connecting plate is fixedly sleeved on the end of the cylindrical extension with the largest inner diameter that is away from the adjacent cylindrical extension.

[0015] Preferably, the counterweight is detachably disposed at the free end of the cylindrical extension with the smallest outer diameter.

[0016] Secondly, the design method of the flexible anti-overturning device for grounding clamp provided by the present invention adopts the following technical solution:

[0017] A design method for a flexible anti-overturning device for a grounding clamp includes the following steps:

[0018] First, the design parameters are determined: the number of cylindrical extensions is n, and the length of each cylindrical extension is L1-L... n The outer diameters are D1-D. n The inner diameters are d1-d in sequence. n The elastic modulus of the cylindrical extension is E, the density is A, and the end load provided by the counterweight to the telescopic member is P.

[0019] Then, based on the knowledge of mechanics of materials, the maximum anti-overturning torque of the grounding clamp flexible anti-overturning device is calculated, and the total weight of the grounding clamp flexible anti-overturning device is calculated accordingly.

[0020] Finally, when the total weight of the grounding clamp flexible anti-rollover device is less than the maximum load of the unmanned aerial vehicle, the design parameters of the maximum anti-rollover torque are taken as the production parameters of the grounding clamp flexible anti-rollover device.

[0021] Preferably, the calculating the maximum anti-rollover torque of the grounding clamp flexible anti-rollover device comprises the following steps:

[0022] S1: the telescopic part is bent downward under the action of the counterweight in use, an n-section variable stiffness cantilever beam model of the telescopic part is constructed, a rectangular coordinate system is constructed with the starting point of the telescopic part as the origin, a point on the nth cylindrical extension is taken as a calculation point (x, y), and a bending moment calculation formula of the nth section of the telescopic part is obtained , wherein u is the horizontal distance from the counterweight to the grounding clamp when the telescopic part is bent, is the horizontal distance from the calculation point to the starting point of the telescopic part when the telescopic part is bent, and L is the total length of all the cylindrical extensions;

[0023] S2: , wherein u n is the distance from the end point of the nth cylindrical extension close to the counterweight to the starting point of the telescopic part when the telescopic part is bent, , wherein p is the radius of curvature at the calculation point when the telescopic part is bent, the calculation formula is , and q is the included angle between the tangent line at the calculation point and the x-axis when the telescopic part is bent, the calculation formula is , I n is the moment of inertia of the nth cylindrical extension, and the calculation formula is ;

[0024] S3: since the stiffness of the first cylindrical extension is much greater than that of the nth cylindrical extension, the deformation is very small, and the horizontal displacement can be ignored, i.e. , as the value of n increases, the horizontal displacement between adjacent two cylindrical extensions is approximately , wherein x n is the distance from the calculation point to the starting point of the telescopic part when the telescopic part is not bent, is the distance from the end point of the n-1th cylindrical extension close to the counterweight to the starting point of the telescopic part when the telescopic part is bent, and the initial displacement u is set to 0 and the convergence tolerance is set according to the above formula, and the iteration is calculated until is less than , the iteration is ended, and the set value of u is outputted;

[0025] S4: the maximum anti-rollover torque M of the grounding clamp flexible anti-rollover device is calculated, and the calculation formula is .

[0026] Preferably, the iterative calculation adopts a small increment of the set value of u for iterative calculation.

[0027] Preferably, the calculation of the total weight of the grounding clamp flexible anti-rollover device comprises the following steps: determining the weight of the mounting assembly as B, the total weight of the grounding clamp flexible anti-rollover device as C, and the calculation formula as , wherein g is the gravity coefficient.

[0028] By adopting the above scheme, when the grounding clamp flexible anti-rollover device is produced, the number of the cylindrical extension parts, the length, the outer diameter, the inner diameter, the elastic modulus, the density and the end load of the counterweight of each cylindrical extension part are determined, which are substituted into the design method to obtain the maximum rollover torque that the grounding clamp flexible anti-rollover device can withstand, and the total weight of the grounding clamp flexible anti-rollover device is calculated, in the case that the total weight is less than the maximum load of the unmanned aerial vehicle, the design parameter with the maximum rollover torque is selected as the production parameter, without the need of product experiment for each set of design parameters, and the production efficiency is improved.

[0029] In summary, the present application comprises at least one of the following beneficial technical effects:

[0030] 1. The grounding clamp flexible anti-rollover device of the present application uses a telescopic piece composed of a plurality of cylindrical extension parts slidingly nested to load a counterweight, which can flexibly bend under external force, reduces the impact of external force on the grounding clamp, and improves the telescopic length per unit weight, providing a larger anti-rollover torque for the grounding clamp under the same weight, thereby improving the anti-rollover torque of the grounding clamp as much as possible under the condition that the load of the unmanned aerial vehicle is limited.

[0031] 2. The grounding clamp flexible anti-rollover device of the present application increases the anti-rollover torque of the grounding clamp by the telescopic piece loaded with the counterweight, reduces the interference of external force on the grounding clamp, and improves the accuracy of identification and positioning of the grounding clamp by the unmanned aerial vehicle.

[0032] 3. The grounding clamp flexible anti-rollover device of the present application cooperates with its design method to determine the number of the cylindrical extension parts, the length, the outer diameter, the inner diameter, the elastic modulus, the density and the end load of the counterweight of each cylindrical extension part when the grounding clamp flexible anti-rollover device is produced, which are substituted into the design method to obtain the maximum rollover torque that the grounding clamp flexible anti-rollover device can withstand, and the total weight of the grounding clamp flexible anti-rollover device is calculated, in the case that the weight of the grounding clamp flexible anti-rollover device and the total weight of the grounding clamp are less than the maximum load of the unmanned aerial vehicle, the design parameter with the maximum rollover torque is selected as the production parameter, without the need of product experiment for each set of design parameters, and the production efficiency is improved. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the flexible anti-overturning device for the grounding clamp in Embodiment 1 of the present invention.

[0035] Figure 2 This is a schematic diagram illustrating the structure of the installation components in Embodiment 1 of the present invention.

[0036] Figure 3 This is a cross-sectional view used to show the internal structure of the telescopic component in Embodiment 1 of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure of the counterweight block used in Embodiment 1 of the present invention.

[0038] Figure descriptions: 1. Telescopic component; 11. Cylindrical extension; 2. Mounting assembly; 21. Positioning plate; 22. Fastening sleeve; 23. Connecting plate; 3. Counterweight; 4. Threaded hole; 5. Limiting ring; 6. Support ring; 7. Connecting hole. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-4 The present invention will be described in further detail below.

[0040] Example 1

[0041] Embodiment 1 of this invention discloses a flexible anti-overturning device for a grounding clamp. (Refer to...) Figure 1 and Figure 2 A flexible anti-overturning device for a grounding clamp includes a telescopic component 1, a counterweight 3, and an installation assembly 2. The telescopic component 1 includes a plurality of cylindrical extensions 11 that are sequentially slidably nested together. The outer diameter and inner diameter of the plurality of cylindrical extensions 11 decrease sequentially. In use, the plurality of cylindrical extensions 11 are fully extended. The counterweight 3 is located at the free end of the cylindrical extension 11 with the smallest outer diameter at the tail of the telescopic component 1. The installation assembly 2 is located on the cylindrical extension 11 with the largest inner diameter at the head of the telescopic rod and is used to fix it to the grounding clamp.

[0042] Reference Figure 2In order to fix the telescopic member 1 on the grounding clamp, the mounting assembly 2 comprises a positioning plate 21 for connecting with the grounding clamp and a fastening sleeve 22 for holding the outer diameter of the largest inner diameter cylindrical extension 11, the positioning plate 21 is provided with threaded holes 4 for connecting with the grounding clamp through bolts, and the fastening sleeve 22 is fixed on the positioning plate 21. The fastening sleeve 22 is provided with multiple, and the multiple fastening sleeves 22 are distributed along the axial direction of the cylindrical extension 11. In the embodiment of the application, the fastening sleeve 22 is provided with two, and the threaded holes 4 are located between the two fastening sleeves 22, and in other embodiments, one, three, four or the like can also be designed according to the length of the cylindrical extension 11 unit. Further, in order to fix the head of the telescopic member 1, the connecting plate 23 is vertically fixed on the positioning plate 21, and the connecting plate 23 is fixed on the largest inner diameter cylindrical extension 11 away from the end of the adjacent cylindrical extension 11.

[0043] Referring to Figure 3 In order to facilitate the contraction and expansion of the cylindrical extension 11 unit in the telescopic member 1, the outer wall of one end of the cylindrical extension 11 coaxially sleeves a limiting ring 5, and the inner wall of the other end coaxially embeds a supporting ring 6, and the limiting ring 5 of the cylindrical extension 11 movably abuts against the supporting ring 6 of the adjacent cylindrical extension 11. The outer diameter of the limiting ring 5 on each cylindrical extension 11 is smaller than the inner diameter of the adjacent last cylindrical extension 11, and larger than the inner diameter of the supporting ring 6 thereon. When each cylindrical extension 11 unit of the telescopic member 1 is expanded, the limiting ring 5 at one end of the cylindrical extension 11 abuts against the supporting ring 6 of the last cylindrical extension 11, and the supporting ring 6 at the other end abuts against the limiting ring 5 of the next cylindrical extension 11. When each cylindrical extension 11 unit is expanded, the flexible bending effect of the telescopic member 1 as a whole is realized under the deformation accumulation of the multiple cylindrical extensions 11.

[0044] Referring to Figure 1 And Figure 4 The counterweight 3 is detachably arranged at the free end of the smallest outer diameter cylindrical extension 11. Specifically, in the embodiment of the application, the connecting hole 7 is arranged on the counterweight 3, the inner wall of the connecting hole 7 is provided with a thread, the outer thread is arranged on the outer wall of the free end of the smallest outer diameter cylindrical extension 11 at the tail of the telescopic member 1, and the outer thread is screw-connected with the connecting hole 7, so as to realize the detachable connection of the counterweight 3 on the cylindrical extension 11, facilitate the replacement of different counterweights 3, and adaptively adjust the maximum overturning torque. In other embodiments, the counterweight 3 is axially provided with a through hole, and the counterweight 3 is detachably fixed by screwing through the through hole and the threaded connection with the cylindrical extension 11.

[0045] The implementation principle of the flexible anti-overturning device for a grounding clamp in Embodiment 1 of the present invention is as follows: When it is necessary to prevent the grounding clamp from overturning, a positioning plate is installed on the grounding clamp with bolts. The hollow design of multiple cylindrical extensions reduces the overall weight of the device, which is beneficial for operation when the drone is carrying the grounding clamp. When the drone is carrying the grounding clamp to remove the grounding wire, the cylindrical extensions slide out from the adjacent cylindrical extensions under the action of gravity until they abut against the support ring and the limiting ring. At this time, the telescopic component is in an extended state. When subjected to external forces such as wind, the telescopic component composed of multiple cylindrical extensions deforms, and the flexible bending buffers the force. At the same time, as the telescopic component extends, the distance between the counterweight and the grounding clamp is increased, increasing the overall anti-overturning torque and improving the stability of the drone carrying the grounding clamp to remove the grounding wire.

[0046] Example 2

[0047] Embodiment 2 of the present invention provides a design method for a flexible anti-overturning device for a grounding clamp. The design steps of the flexible anti-overturning device for a grounding clamp are as follows:

[0048] First, determine the design parameters: the number of cylindrical extensions is n, and the length of each cylindrical extension is L1-L... n The outer diameters are D1-D. n The inner diameters are d1-d in sequence. n The elastic modulus of the cylindrical extension is E, the density is A, and the end load provided by the counterweight to the telescopic component is P.

[0049] Then, based on the principles of mechanics of materials, the maximum anti-overturning torque of the flexible anti-overturning device of the grounding clamp is calculated, including the following steps:

[0050] S1: During use, the expansion joint sags and bends downwards under the action of the counterweight. An n-segment variable stiffness cantilever beam model of the expansion joint is constructed. A rectangular coordinate system is established with the starting point of the expansion joint as the origin. A point on the nth cylindrical extension is taken as the calculation point (x, y), and the formula for calculating the bending moment on the nth segment of the expansion joint is derived. Where u is the horizontal distance from the counterweight to the grounding clamp when the telescopic component bends. The horizontal distance from the point where the telescopic component is calculated to the starting end of the telescopic component when it bends is L, where L is the total length of all the cylindrical extensions.

[0051] S2: , where u n Let be the distance from the end of the nth cylindrical extension closest to the counterweight to the starting end of the telescopic component when it bends. Where ρ is the radius of curvature at the calculation point when the expansion joint bends, and the calculation formula is: θ is the angle between the tangent at the calculation point and the x-axis when the expansion joint bends, and the calculation formula is: , I n I for the inertia moment of the n-th cylindrical extension, the calculation formula is ;

[0052] S3: Because the stiffness of the first cylindrical extension is much greater than that of the n-th cylindrical extension, its deformation is very small, and the horizontal displacement can be ignored, that is, , with the increase of n value, the horizontal displacement between the adjacent two cylindrical extensions is approximately, so that , where x n is the distance from the calculation point to the starting end point of the telescopic part when the telescopic part is not bent, is the distance from the end point of the n-1-th cylindrical extension close to the weight block to the starting end point of the telescopic part when the telescopic part is bent, the initial displacement u is set to 0 according to the above formula, the convergence tolerance , the set value of u is increased by a small amount of 0.001, and the iterative calculation is carried out until is less than , the iteration is ended, and the set value of u is output, that is, the maximum horizontal displacement;

[0053] S4: Calculate the maximum anti-rollover torque M of the grounding clamp flexible anti-rollover device, the calculation formula is .

[0054] And the total weight of the grounding clamp flexible anti-rollover device is calculated, including the following steps: determining the weight of the mounting assembly as B, and the total weight of the grounding clamp flexible anti-rollover device as C, the calculation formula is , wherein g is the gravity coefficient.

[0055] Finally, when the total weight of the grounding clamp flexible anti-rollover device is less than the maximum load of the unmanned aerial vehicle, the design parameters of the maximum anti-rollover torque are taken as the production parameters of the grounding clamp flexible anti-rollover device.

[0056] In this embodiment, the number of cylindrical extensions is 10, and because the weight and volume proportion occupied by the limiting ring and the supporting ring is small compared with the whole telescopic part, the cylindrical extension is approximated as a cylinder, the calculation is simplified in the design link, and the length of each cylindrical extension L1-L 10 is 20 cm, the outer diameter of the 10 cylindrical extensions is 22 mm, 20 mm, 18 mm, 16 mm, 14 mm, 12 mm, 10 mm, 8 mm, 6 mm, and 4 mm, respectively, the inner diameter is 20 mm, 18 mm, 16 mm, 14 mm, 12 mm, 10 mm, 8 mm, 6 mm, 4 mm, and 2 mm, respectively, and the wall thickness is 1 mm, the cylindrical extension is made of carbon fiber reinforced composite material, the elastic modulus E is 20 Gpa, and the density A is 1.6 g / cm 3, the terminal load P is 2N. According to the above design method, the maximum horizontal displacement u is calculated to be 6cm, the maximum anti-rollover torque M is calculated to be 3.88N·m, the total weight of the 10 cylindrical extensions is about 120g.

[0057] While the existing other forms of telescopic members such as rigid metal slide rails certainly have a weight much greater than the telescopic member of the present application, and the slide rail is simplified to a thin-walled plate structure, in the case of the same wall thickness t of 1mm and the same material, taking the average circumference b of the cylindrical extension as 15mm as the width of the thin-walled plate structure of the slide rail, according to the formula , the cross-sectional moment of inertia thereof is calculated to be 1.25mm 4 , the cross-sectional moment of inertia of the smallest diameter cylindrical extension of the present application is calculated to be 11.78mm 4 , the cross-sectional moment of inertia of the largest diameter cylindrical extension of the present application is calculated to be 3645.03mm 4 , which is nearly 10-3000 times of the cross-sectional moment of inertia of the thin-walled plate structure of the slide rail. In the case of the same elastic modulus, the bending deformation u is inversely proportional to the cross-sectional moment of inertia, and according to the calculation formula of the maximum anti-rollover torque M, the maximum anti-rollover torque M is proportional to the cross-sectional moment of inertia. That is, the cross-sectional moment of inertia of the thin-walled plate structure of the slide rail is much smaller than the thin-walled cylindrical structure of the telescopic member of the present application, which will cause the bending deformation to increase, resulting in a decrease in the maximum anti-rollover torque. In summary, even if the same material is used, the maximum anti-rollover torque of the telescopic member in the form of the slide rail is lower than that of the telescopic member of the present application under the same weight, and considering the complexity of the shape of the slide rail, which limits the production material, and the difficulty of using carbon fiber reinforced composite material for production, which is not conducive to actual production.

[0058] In summary, when producing the grounding clamp flexible anti-rollover device, the number of cylindrical extensions, the length, the outer diameter, the inner diameter, the elastic modulus, the density and the terminal load of the counterweight of each cylindrical extension are determined, which are then substituted into the design method to obtain the maximum rollover torque that the grounding clamp flexible anti-rollover device can withstand, and the total weight of the grounding clamp flexible anti-rollover device is calculated. In the case where the total weight is less than the maximum load of the unmanned aerial vehicle, the design parameter with the maximum rollover torque is selected as the production parameter, and there is no need to conduct product experiments for each set of design parameters, thereby improving the production efficiency.

[0059] The specific embodiments are merely an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method of designing a ground clamp flexible anti-inversion device, characterized by: The grounding clamp flexible anti-overturning device comprises: A telescopic part comprising a plurality of cylindrical extension parts connected in sequence by sliding and nesting, the outer diameter and the inner diameter of the plurality of cylindrical extension parts gradually decrease one by one, the outer diameter of the cylindrical extension part is 4-22mm, the inner diameter is 2-20mm, and the wall thickness is 0.5-1.5mm; A counterweight arranged at the free end of the cylindrical extension part with the smallest outer diameter; And a mounting assembly for fixing the cylindrical extension part with the largest inner diameter and the grounding clamp; One end of the outer wall of the cylindrical extension part is coaxially sleeved with a limiting ring, and the other end of the inner wall is coaxially embedded with a supporting ring, and the limiting ring of the cylindrical extension part and the supporting ring of the adjacent cylindrical extension part are movably abutted; the mounting assembly comprises a positioning plate for connecting with the grounding clamp and a fastening sleeve for tightly holding the outer diameter of the cylindrical extension part with the largest inner diameter, and the fastening sleeve is fixed on the positioning plate; the fastening sleeve is provided with a plurality of fastening sleeves, and the plurality of fastening sleeves are distributed along the axial direction of the cylindrical extension part; a connecting plate is vertically fixed on the positioning plate, and the connecting plate is fixedly sleeved with the end of the cylindrical extension part with the largest inner diameter away from the adjacent cylindrical extension part; the counterweight is detachably arranged at the free end of the cylindrical extension part with the smallest outer diameter; the telescopic part is bent downward under the action of the counterweight during use; The design method of the grounding clamp flexible anti-overturning device comprises the following steps: First, determine the design parameters, the number of the cylindrical extension is n, the length of each of the cylindrical extension is L1-L n , the outer diameter is D1-D n , the inner diameter is d1-d n , the elastic modulus of the cylindrical extension is E, the density is A, and the end load provided by the counterweight to the telescopic member is P; Then, according to the knowledge of material mechanics, the maximum anti-overturning torque of the grounding clamp flexible anti-overturning device is calculated, and the total weight of the grounding clamp flexible anti-overturning device is calculated correspondingly; Finally, when the total weight of the grounding clamp flexible anti-overturning device is less than the maximum load of the unmanned aerial vehicle, the design parameters of the maximum anti-overturning torque are taken as the production parameters of the grounding clamp flexible anti-overturning device.

2. The method of designing a flexible anti-inversion device for a grounding clamp as claimed in claim 1, wherein: The calculation of the maximum anti-overturning torque of the grounding clamp flexible anti-overturning device comprises the following steps: S1: the telescopic piece is bent downward under the action of the counterweight during use, an n-section variable stiffness cantilever beam model is constructed for the telescopic piece, a rectangular coordinate system is constructed with the starting point of the telescopic piece as the origin, a point on the nth cylindrical extension is taken as a calculation point (x, y), and a bending moment calculation formula of the nth section of the telescopic piece is obtained wherein u is the horizontal distance from the counterweight to the grounding clamp when the telescopic piece is bent, is the horizontal distance from the calculation point to the starting point of the telescopic piece when the telescopic piece is bent, and L is the total length of all the cylindrical extensions; S2: wherein u n is the distance from the end point of the n-th cylindrical extension close to the end of the counterweight to the starting end point of the telescopic member when the telescopic member is bent, wherein p is the radius of curvature at the calculation point when the telescopic member is bent, and the calculation formula is wherein θ is the angle between the tangent line at the calculation point and the x-axis when the telescopic member is bent, and the calculation formula is n is the moment of inertia of the n-th cylindrical extension, and the calculation formula is ;​ S3: Since the stiffness of the first cylindrical extension is much greater than that of the nth cylindrical extension, its deformation is very small, and the horizontal displacement can be ignored. As the value of n increases, the horizontal displacement between two adjacent cylindrical extensions is approximately equal, therefore it can be assumed that... , where x n Calculate the distance from the point where the expansion joint is not bent to the starting end of the expansion joint. The distance from the end point of the (n-1)th cylindrical extension near the counterweight to the starting end point of the telescopic component when it bends is given by the above formula, where the initial displacement u is set to 0 and the convergence tolerance is... Iterative calculation to Less than The iteration ends, and the set value of u is output; S4: calculating the maximum anti-overturning torque M of the grounding clamp flexible anti-overturning device, the calculation formula is .

3. The method of designing a flexible anti-inversion device for a grounding clamp as claimed in claim 2, wherein: The iterative calculation increases the set value of u by a small amount for iterative calculation. The iterative calculation increases the set value of u by a small amount for iterative calculation.

4. The method of designing a flexible anti-inversion device for a ground clamp of claim 1, wherein: The calculating the total weight of the grounding clamp flexible anti-overturning device comprises the following steps: determining the weight of the mounting assembly as B, and the total weight of the grounding clamp flexible anti-overturning device as C, and the calculation formula is wherein g is a gravity coefficient.

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