Disc insulator single link single hanging point single clamp strain string

Abstract

The application discloses a disc-shaped insulator single-link single-hanging-point single-wire clamp strain string and belongs to the technical field of strain strings, comprising an adjusting plate, a strain clamp, a standby clamp, a standby wire and a fixed clamp, the adjusting plate is installed at the end of the insulator through a hanging ring, mounting holes are uniformly arranged on the surface of the adjusting plate, the strain clamp and the fixed clamp are clamped and assembled on the conductor wire, and the two ends of the standby wire are clamped and assembled between the standby clamp and the fixed clamp, standby wire and fixed clamps are designed, the standby wire is connected between the two, when the conductor wire near the strain clamp is broken, the standby wire can be quickly straightened, the fixed clamp is matched to limit the conductor wire, the conductor wire is maintained in a suspended state, time is provided for repair work, disasters such as fire and short circuit caused by the conductor wire falling are avoided, safety is improved, buffer springs, swing springs and pendulum components are designed, the tension and swing of the standby wire can be effectively buffered, the standby wire is prevented from being broken, and the stability of the standby wire is improved.

Description

Technical Field

[0001] This invention belongs to the field of tension string technology, and specifically provides a single-connection, single-point, single-clamp tension string for disc insulators. Background Technology

[0002] In power transmission lines, conductor fractures caused by wind, mechanical forces, or material fatigue pose a significant safety hazard to power system operation. Fretting wear is particularly prevalent at the conductor clamp exit, a stress concentration area that easily leads to the formation and propagation of radial cracks, ultimately resulting in fatigue fracture. In reality, a broken conductor typically detaches completely and hangs down, causing power outages and potentially triggering secondary disasters such as fires and short circuits. To prevent and reduce such accidents, power companies typically implement a series of measures, including:

[0003] 1. Conduct regular inspections and maintenance of power transmission lines to promptly identify potential conductor damage;

[0004] 2. Install vibration sensors or use drones for inspection to achieve real-time monitoring of power transmission lines, thereby quickly responding to and promptly addressing the risk of breakage.

[0005] However, the above methods are time-consuming and labor-intensive, and cannot solve the disaster caused by the conductor falling after it breaks. Therefore, there is a need for a single-connection, single-point, single-clamp tension string disc insulator that can maintain the conductor's suspension after it breaks to prevent disasters. Summary of the Invention

[0006] To solve the above problems, the present invention provides a single-connection, single-point, single-clamp tension string of a disc insulator.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a single-connection, single-point, single-clamp tension string of a disc insulator is assembled at the end of the insulator, including an adjusting plate, a tension clamp, a spare clamp, a spare wire, and a fixed clamp. The adjusting plate is installed at the end of the insulator via a hanging ring. The surface of the adjusting plate is evenly provided with mounting holes, and the tension clamp and the spare clamp are respectively installed on the adjusting plate via hanging rings. The tension clamp and the fixed clamp are clamped and assembled on the conductor, and the two ends of the spare wire are clamped and assembled between the spare clamp and the fixed clamp.

[0008] The spare wire clamp includes a conical shell, a connecting flange fixedly installed at the rear end of the conical shell, a wire clamp structure inserted into the inner cavity of the conical shell, and one end of the spare wire clamped and installed in the wire clamp structure. The outer circumferential surface of the wire clamp structure is a conical surface that matches the inner wall of the conical shell. A clamping ring is fixedly installed inside the conical shell. A cylindrical groove is opened on the outer circumferential surface of the wire clamp structure, and the clamping ring is sleeved on the cylindrical groove. A cylindrical shell is integrally formed at the front end of the conical shell, and a retaining ring is integrally formed on the inner wall of the cylindrical shell. One end of a buffer spring is fixedly installed at the inner end of the retaining ring, and the other end of the buffer spring contacts the wire clamp structure. A swing spring is provided at the outer end of the retaining ring, and the swing spring is a double spring structure.

[0009] Furthermore, the outer end of the conical shell is integrally formed with a shell flange, and the shell flange is fixedly installed on the connecting flange by bolts and nuts, and a connecting ring is fixedly installed on the outer end of the connecting flange.

[0010] Furthermore, the wire clamp structure includes a first wire clamp and a second wire clamp. The inner walls of the first wire clamp and the second wire clamp are both provided with annular grooves. The inner walls of the first wire clamp and the second wire clamp are both fitted with rubber pads. The outer wall of the rubber pad is integrally formed with a rubber ring, and the rubber ring is inserted into the annular groove.

[0011] Furthermore, the surface of the first clamp is integrally formed with a plug, and the surface of the second clamp is provided with a slot corresponding to the plug, and the plug is inserted into the slot.

[0012] Furthermore, the swing spring includes a mounting ring, an inner spring, an outer spring, and a connecting section. The outer spring is located outside the inner spring, and the outer end of the inner spring is connected to the outer end of the outer spring through the connecting section. The inner end of the inner spring is fixedly mounted with a mounting ring, and the mounting ring is fixedly mounted inside the cylindrical housing.

[0013] Furthermore, a pendulum assembly is fitted onto the outer surface of the cylindrical shell of the conical shell. The pendulum assembly includes an annular shell and a rotating ring, with the rotating ring rotatably assembled inside the annular shell. A connecting rod is fixedly installed on the outer surface of the rotating ring, and a weight is fixedly installed at the outer end of the connecting rod. The outer surface of the cylindrical shell is threaded, and a limit ring is screwed onto the outer surface of the cylindrical shell. Two limit rings are respectively disposed at both ends of the pendulum assembly.

[0014] Furthermore, strain gauges are fixedly mounted on the surface of the spare wire.

[0015] Furthermore, limit structures are provided at both ends of the spare line.

[0016] Furthermore, the fixing clamp includes a base and clamping fingers. The clamping fingers are symmetrically hinged at both ends of the base, and the inner ends of the clamping fingers are fixed to the base by bolts and nuts. The inner surface of the base and the inner surface of the clamping fingers are symmetrically provided with arc-shaped grooves, and an annular sleeve is provided in the arc-shaped groove. The other end of the spare wire is clamped and assembled in the annular sleeve, and the surface of the annular sleeve is provided with an opening.

[0017] Furthermore, a spacer is provided between adjacent fixed clamps.

[0018] The beneficial effects of using this invention are:

[0019] 1. This invention designs a spare clamp and a fixed clamp, with a spare wire connected between them. When the conductor near the tension clamp breaks, the spare wire can quickly straighten and work with the fixed clamp to restrict the conductor, keeping it suspended in the air, providing time for emergency repairs, and preventing the conductor from falling and causing fires, short circuits, or other disasters, thus improving safety.

[0020] 2. The present invention incorporates a clamp structure and a buffer spring structure within the spare clamp to buffer the instantaneous impact force on the spare wire when the conductor breaks, reducing the tension on the spare wire and preventing it from breaking or the connection point from coming loose. This allows the spare wire to effectively maintain the conductor in the air.

[0021] 3. The present invention designs a swing spring and a pendulum assembly to buffer the swing caused by the movement after the conductor breaks, greatly reduce the swing amplitude of the spare wire, reduce the repeated bending of the spare wire, reduce its wear at the spare wire clamp, effectively prevent the spare wire from breaking, and improve the stability of the spare wire. Attached Figure Description

[0022] Figure 1 This is one of the overall schematic diagrams of the present invention.

[0023] Figure 2 This is the second overall schematic diagram of the present invention.

[0024] Figure 3 This is a three-dimensional schematic diagram of the spare wire clamp of the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the spare clamp of the present invention.

[0026] Figure 5 This is a front sectional view of the spare wire clamp of the present invention.

[0027] Figure 6 This is a schematic diagram of the internal structure of the pendulum assembly of the present invention.

[0028] Figure 7 This is a left sectional view of the fixing clamp of the present invention.

[0029] The reference numerals in the attached drawings include: 1. Adjusting plate; 2. Tension clamp; 3. Spare clamp; 31. Conical shell; 311. Shell flange; 312. Retaining ring; 32. Connecting flange; 33. Clamp structure; 331. First clamp; 332. Second clamp; 333. Rubber pad; 334. Annular groove; 335. Rubber ring; 336. Insert block; 34. Clamping ring; 35. Buffer spring; 36. Swing spring; 361. Mounting ring; 362. Inner spring; 363. Outer spring; 364. Connecting section; 37. Pendulum assembly; 371. Annular shell; 372. Rotating ring; 373. Connecting rod; 374. Weight; 38. Limiting ring; 39. Strain gauge; 4. Spare wire; 5. Fixed clamp; 51. Base; 52. Clamping finger; 53. Annular sleeve; 6. Spacer. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figures 1 to 7 A single-connection, single-point, single-clamp tension string of disc insulators is assembled at the end of the insulator. It includes an adjusting plate 1, a tension clamp 2, a spare clamp 3, a spare wire 4, and a fixed clamp 5. The adjusting plate 1 is installed at the end of the insulator via a hanging ring. The surface of the adjusting plate 1 is evenly provided with mounting holes. The tension clamp 2 and the spare clamp 3 are respectively installed on the adjusting plate 1 via hanging rings. The tension clamp 2 and the fixed clamp 5 are clamped and assembled on the conductor. The two ends of the spare wire 4 are clamped and assembled between the spare clamp 3 and the fixed clamp 5.

[0032] The adjusting plate 1 is fan-shaped, with multiple mounting holes on one side of its arc. The hanging rings connecting the tension clamp 2 and the spare clamp 3 are set on the mounting holes. A hole is opened near the intersection of the two straight surfaces of the adjusting plate 1 for connecting to the end of the insulator.

[0033] The spare clamp 3 is used to fix one end of the spare wire 4, and at the same time buffers the instantaneous straggling and swing of the spare wire 4, reducing the stress on the spare wire 4 after the conductor breaks. The fixing clamp 5 is used to fix the other end of the spare wire 4.

[0034] The fixing clamp 5 serves to connect the conductor and the spare wire 4.

[0035] When the conductor breaks near the tension clamp 2, the spare wire 4 serves as a temporary connection to keep the conductor suspended in the air, preventing the conductor from falling and causing disasters such as fires and short circuits, improving the safety after the conductor breaks, providing time for emergency repairs, and reducing the difficulty of maintenance work.

[0036] like Figures 3 to 5 As shown, the spare wire clamp 3 includes a conical shell 31. A connecting flange 32 is fixedly installed at the rear end of the conical shell 31. A wire clamp structure 33 is inserted into the inner cavity of the conical shell 31, and one end of the spare wire 4 is clamped and installed in the wire clamp structure 33. The outer peripheral surface of the wire clamp structure 33 is a conical surface that matches the inner wall of the conical shell 31. A clamping ring 34 is fixedly installed inside the conical shell 31. A cylindrical groove is opened on the outer peripheral surface of the wire clamp structure 33, and the clamping ring 34 is sleeved on the cylindrical groove. A cylindrical shell is integrally formed at the front end of the conical shell 31, and a retaining ring 312 is integrally formed on the inner wall of the cylindrical shell. One end of a buffer spring 35 is fixedly installed at the inner end of the retaining ring 312, and the other end of the buffer spring 35 contacts the wire clamp structure 33. A swing spring 36 is provided at the outer end of the retaining ring 312, and the swing spring 36 is a double spring structure.

[0037] There are two conical shells 31, which are combined to form a conical shape, making it easy to install, replace and maintain.

[0038] The clamping ring 34 can be installed inside the conical housing 31 by welding. The inner surface of the clamping ring 34 has an oblique opening on one side to facilitate the passage of the conical surface of the wire clamp structure 33.

[0039] When the spare wire 4 is not under force, the elastic force of the buffer spring 35 prevents the tapered surface of the wire clamp structure 33 from contacting the inner wall of the tapered housing 31.

[0040] When the conductor breaks, the spare wire 4 instantly straightens, first pulling the clamp structure 33 to compress the buffer spring 35, which buffers the spare wire 4 and reduces the degree of tension change, preventing the spare wire 4 from breaking due to sudden large tension. Then, the conical surface of the clamp structure 33 contacts the inner wall of the conical shell 31, increasing the pressure on the spare wire 4 and further clamping and fixing it. Compared with the traditional wedge clamp, it increases the buffering capacity while maintaining the clamping force on the spare wire 4, thus protecting the spare wire 4.

[0041] When the conductor breaks, the movement of the conductor will cause the spare wire 4 to swing through the transmission. The swing spring 36 plays a role in buffering the swing, greatly reducing the swing amplitude of the spare wire 4, reducing the degree of repeated bending of the spare wire 4, reducing the wear of the spare wire 4 and the spare wire clamp 3, effectively preventing the spare wire 4 from breaking and improving the stability of the spare wire 4.

[0042] Specifically, such as Figures 3 to 5 As shown, the outer end of the conical shell 31 is integrally formed with a shell flange 311, and the shell flange 311 is fixedly installed on the connecting flange 32 by bolts and nuts. A connecting ring is fixedly installed on the outer end of the connecting flange 32.

[0043] The conical shell 31 is mounted on the connecting flange 32 via the shell flange 311, thereby enabling the splicing of two conical shells 31.

[0044] Connect the hanging rings to each other, and then connect them to the adjustment plate 1.

[0045] Specifically, such as Figure 4 and Figure 5 As shown, the wire clamp structure 33 includes a first wire clamp 331 and a second wire clamp 332. The inner walls of the first wire clamp 331 and the second wire clamp 332 are provided with annular grooves 334. The inner walls of the first wire clamp 331 and the second wire clamp 332 are fitted with rubber pads 333. The outer wall of the rubber pads 333 is integrally formed with a rubber ring 335, and the rubber ring 335 is inserted into the annular groove 334.

[0046] The first clamp 331 and the second clamp 332 are joined together to clamp and fix the spare wire 4. A rubber pad 333 is provided to increase friction, thereby improving the clamping tightness of the spare wire 4.

[0047] An annular groove 334 and a rubber ring 335 are provided to fix the rubber ring 335.

[0048] After the spare wire 4 is placed and clamped in the clamping structure 33, there is a gap between the first clamp 331 and the second clamp 332 so that the clamping structure 33 can be inserted into the clamping ring 34 and continue to provide clamping force when the conical surface of the clamping structure 33 contacts the inner wall of the conical housing 31.

[0049] When installing the wire clamp structure 33, the cylindrical groove of the wire clamp structure 33 is inserted into the clamping ring 34. At this time, the clamping ring 34 exerts pressure on the first wire clamp 331 and the second wire clamp 332, causing the rubber pad 333 to press tightly onto the spare wire 4, thereby clamping and fixing the spare wire 4.

[0050] Specifically, such as Figure 4 As shown, the surface of the first wire clamp 331 is integrally formed with a plug 336, and the surface of the second wire clamp 332 is provided with a slot corresponding to the plug 336, and the plug 336 is inserted into the slot.

[0051] The design of the insert 336 and the slot facilitates the splicing of the first wire clamp 331 and the second wire clamp 332. The depth of the slot is greater than the height of the insert 336.

[0052] Specifically, such as Figures 3 to 5As shown, the swing spring 36 includes a mounting ring 361, an inner spring 362, an outer spring 363, and a connecting section 364. The outer spring 363 is located outside the inner spring 362, and the outer end of the inner spring 362 is connected to the outer end of the outer spring 363 through the connecting section 364. The inner end of the inner spring 362 is fixedly mounted with the mounting ring 361, and the mounting ring 361 is fixedly mounted inside the cylindrical housing.

[0053] Mounting ring 361 can be fixed by welding or by screws.

[0054] Furthermore, the swing spring 36 is a double spring structure consisting of an inner spring 362 and an outer spring 363, which are connected by a connecting section 364. The connecting section 364 can be installed by welding or multiple connecting sections 364 can be installed to increase the robustness of the inner spring 362 and the outer spring 363.

[0055] The inner spring 362 has a small diameter, high stiffness, and a relatively high natural frequency, while the outer spring 363 has a large diameter, low stiffness, and a relatively low natural frequency. The two are welded together through the connecting section 364 to form a composite spring system, which broadens the overall vibration spectrum. At the same time, when the spare line 4 swings, the difference in the different spring frequencies will generate a damping interference effect to avoid an increase in amplitude.

[0056] When the spare line 4 swings to one side, the inner spring 362 is stretched and the outer spring 363 is compressed. When it swings in the opposite direction, the forces are opposite. At the same time, the connecting section 364 makes the two springs work together at all times. No matter which direction the conductor swings, it can simultaneously induce both compression and tension deformation, which significantly improves the damping effect.

[0057] Under the combined action of friction between the metal wires of the inner spring 362 and the outer spring 363 and high-frequency micro-vibration friction, more kinetic energy can be converted into heat energy, which is beneficial to reduce the energy of the swing of the spare line 4. If shot peening or other treatments are carried out on the surface of the spring, the proportion of friction energy consumption can be further increased.

[0058] Through the aforementioned effects, the swing spring 36 can effectively reduce the swing amplitude of the spare line 4 and improve the stability of the spare line 4.

[0059] For the dual-spring structure design of the swing spring 36, when one spring breaks due to fatigue or overload, the other spring can still maintain the basic anti-swing function and prevent the spare line 4 from becoming completely unstable.

[0060] The inner spring 362 and the outer spring 363 have opposite directions of rotation, which can prevent the residual coil from getting stuck in the other spring after the spring breaks, ensure the normal operation of the springs that have not failed, and facilitate the installation of the connecting section 364.

[0061] The inner end of the outer spring 363 is mounted on the limiting ring 38.

[0062] Specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, a pendulum assembly 37 is fitted onto the outer surface of the cylindrical shell of the conical shell 31. The pendulum assembly 37 includes an annular shell 371 and a rotating ring 372, and the rotating ring 372 is rotatably assembled inside the annular shell 371. A connecting rod 373 is fixedly installed on the outer surface of the rotating ring 372, and a weight 374 is fixedly installed on the outer end of the connecting rod 373. The outer surface of the cylindrical shell is threaded, and a limit ring 38 is screwed onto the outer surface of the cylindrical shell. Two limit rings 38 are respectively set at both ends of the pendulum assembly 37.

[0063] When the broken conductor causes the spare wire 4 to swing, the pendulum assembly 37 can reduce or eliminate the vibration and swaying of the spare wire 4 and the spare wire clamp 3, thus playing a buffering role.

[0064] When the spare line 4 swings due to a broken conductor, the weight 374 remains in its original motion state under the action of inertial force. The connecting rod 373 and the weight 374 apply a reverse torque to the rotating ring 372, which can offset part of the initial swing kinetic energy. When the swing continues, the rotating ring 372 generates sliding friction with the inner wall of the annular shell 371, which can convert part of the kinetic energy into heat energy. At the same time, the asymmetric eccentric design of the connecting rod 373 and the weight 374 can aggravate the vibration phase difference and enhance energy consumption, thereby achieving the anti-swing and buffering effect.

[0065] The annular shell 371 can protect the conical shell 31, effectively blocking the tension clamp 2 and preventing the tension clamp 2 from bumping and damaging the conical shell 31.

[0066] The pendulum assembly 37 and the limiting ring 38 are installed on the cylindrical shell of the conical shell 31, which can realize the closure of the cylindrical shell of the two conical shells 31 when they are joined together. They cooperate with the shell flange 311 and the connecting flange 32 to realize the stable splicing and closure of the two conical shells 31.

[0067] Specifically, such as Figure 5 As shown, strain gauges 39 are fixedly mounted on the surface of spare line 4.

[0068] The strain gauge 39 is used to measure the stress change of the spare wire 4 and is connected to the processor via a line. The processor is not shown in the figure. It can be set on the outside or on the spare wire clamp 3. After the wire breaks, the spare wire 4 will be straightened instantly, which will generate a large stress. After the strain gauge 39 and the processor process the stress information, they will send a signal via line or wireless means to enable workers to carry out maintenance in time.

[0069] The conical housing 31 has a small hole for the wires connecting the strain gauge 39 to pass through, and the buffer spring 35 can be a spring with a large pitch to allow the wires to pass through.

[0070] Specifically, the two ends of the spare line 4 are equipped with limit structures.

[0071] The limiting structure can be fitted with a ball or a limiting plate, or the spare line 4 can be knotted to further prevent the spare line 4 from coming off the clamp structure 33.

[0072] Specifically, such as Figure 7 As shown, the fixed wire clamp 5 includes a base 51 and a clamping finger 52. The clamping finger 52 is symmetrically hinged at both ends of the base 51, and the inner end of the clamping finger 52 is fixed to the base 51 by bolts and nuts. The inner surface of the base 51 and the inner surface of the clamping finger 52 are symmetrically provided with arc-shaped grooves, and an annular sleeve 53 is provided in the arc-shaped groove. The other end of the spare wire 4 is clamped and assembled in the annular sleeve 53, and the surface of the annular sleeve 53 is provided with an opening.

[0073] The annular sleeve 53 has an opening, which allows for better force application to the inner conductor or spare wire 4.

[0074] Specifically, such as Figure 1 and Figure 2 As shown, a spacer 6 is provided between adjacent fixed clamps 5.

[0075] This disc insulator is a single-connection, single-suspension-point, single-clamp tension string. When the conductor is normally connected, the spare line 4 is in a slack state and is suspended below the conductor.

[0076] When the conductor near the tension clamp 2 breaks, the spare conductor 4 will be instantly stretched and straightened by the fixed clamp 5. At this time, due to friction, the spare conductor 4 will move the clamp structure 33 and compress the buffer spring 35, which will play a buffering role. At the same time, the swing spring 36 will compress and extend back and forth, which will play an auxiliary buffering role. Then, the conical surface of the clamp structure 33 will contact the inner wall of the conical shell 31, further clamping and fixing the spare conductor 4. When the spare conductor 4 is stretched, the adjusting plate 1 will deflect. At the same time, the movement of the conductor at the other end of the fixed clamp 5 will eventually cause the spare conductor 4 to swing. At this time, the swing spring 36 and the pendulum assembly 37 will buffer and weaken the swing of the spare conductor 4. Under the combined action of the above process, the instantaneous tension on the spare conductor 4 can be effectively reduced and the swing amplitude can be reduced, which can effectively prevent the spare conductor 4 from breaking. In this way, the conductor can be kept in a suspended state, avoiding the conductor from falling and causing fire, short circuit and other disasters, and improving the safety when the conductor breaks.

[0077] Meanwhile, when the backup line 4 is straightened, the strain gauge 39 and the processor process the stress information and send a signal via line or wireless means, which can lead the workers to understand the situation in time and take action to carry out maintenance.

[0078] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A single-strand, single-point, single-clamp tension string of a disc insulator, assembled at the end of the insulator, characterized in that: The device includes an adjusting plate, a tension clamp, a spare clamp, a spare wire, and a fixed clamp. The adjusting plate is installed on the end of the insulator via a hanging ring. The surface of the adjusting plate is evenly provided with mounting holes. The tension clamp and the spare clamp are respectively installed on the adjusting plate via hanging rings. The tension clamp and the fixed clamp are clamped and assembled on the conductor. The two ends of the spare wire are clamped and assembled between the spare clamp and the fixed clamp. The spare wire clamp includes a conical shell, a connecting flange fixedly installed at the rear end of the conical shell, a wire clamp structure inserted into the inner cavity of the conical shell, and one end of the spare wire clamped and installed in the wire clamp structure. The outer peripheral surface of the wire clamp structure is a conical surface that matches the inner wall of the conical shell. A clamping ring is fixedly installed inside the conical shell. A cylindrical groove is opened on the outer peripheral surface of the wire clamp structure, and the clamping ring is sleeved on the cylindrical groove. A cylindrical shell is integrally formed at the front end of the conical shell, and a retaining ring is integrally formed on the inner wall of the cylindrical shell. One end of a buffer spring is fixedly installed at the inner end of the retaining ring, and the other end of the buffer spring contacts the wire clamp structure. A swing spring is provided at the outer end of the retaining ring, and the swing spring is a double spring structure. A pendulum assembly is fitted onto the outer surface of the cylindrical shell of the conical shell. The pendulum assembly includes an annular shell and a rotating ring, with the rotating ring rotatably assembled inside the annular shell. A connecting rod is fixedly installed on the outer surface of the rotating ring, and a weight is fixedly installed at the outer end of the connecting rod. The outer surface of the cylindrical shell is threaded, and a limit ring is screwed onto the outer surface of the cylindrical shell. Two limit rings are respectively located at both ends of the pendulum assembly.

2. The disc insulator single-span single-point single-clamp tension string according to claim 1, characterized in that: The outer end of the conical shell is integrally formed with a shell flange, and the shell flange is fixedly installed on the connecting flange by bolts and nuts. A connecting ring is fixedly installed on the outer end of the connecting flange.

3. The disc insulator single-span single-point single-clamp tension string according to claim 1, characterized in that: The wire clamp structure includes a first wire clamp and a second wire clamp. The inner walls of the first wire clamp and the second wire clamp are provided with annular grooves. The inner walls of the first wire clamp and the second wire clamp are fitted with rubber pads. The outer wall of the rubber pads is integrally formed with a rubber ring, and the rubber ring is inserted into the annular groove.

4. The single-strand, single-point, single-clamp tension string of disc insulators according to claim 3, characterized in that: The first clamp has an integrally formed insert block on its surface, and the second clamp has a slot on its surface corresponding to the insert block, and the insert block is inserted into the slot.

5. The single-strand, single-point, single-clamp tension string of a disc insulator according to claim 1, characterized in that: The swing spring includes a mounting ring, an inner spring, an outer spring, and a connecting section. The outer spring is located outside the inner spring, and the outer end of the inner spring is connected to the outer end of the outer spring through the connecting section. The inner end of the inner spring is fixedly mounted with a mounting ring, and the mounting ring is fixedly mounted inside the cylindrical shell.

6. The disc insulator single-span single-point single-clamp tension string according to claim 1, characterized in that: Strain gauges are fixedly mounted on the surface of the spare line.

7. The disc insulator single-span single-point single-clamp tension string according to claim 1, characterized in that: Limiting structures are provided at both ends of the spare line.

8. The single-strand, single-point, single-clamp tension string of disc insulators according to claim 1, characterized in that: The fixing clamp includes a base and clamping fingers. The clamping fingers are symmetrically hinged at both ends of the base, and the inner ends of the clamping fingers are fixed to the base by bolts and nuts. The inner surface of the base and the inner surface of the clamping fingers are symmetrically provided with arc-shaped grooves, and an annular sleeve is provided in the arc-shaped groove. The other end of the spare wire is clamped and assembled in the annular sleeve, and the surface of the annular sleeve is provided with an opening.

9. The single-span, single-point, single-clamp tension string of a disc insulator according to claim 1, characterized in that: A spacer is provided between adjacent fixed clamps.

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