Flexible butt joint device and method of an ultra-high voltage bus without support insulator

Abstract

The application discloses a kind of ultra-high voltage busbar flexible butt joint device and method without support insulator, it is related to high voltage cable connection technical field, including insulator and two busbars, further including connecting assembly;The connecting assembly includes the butt block fixedly connected with insulator, fixedly installed with fixed frame and two arc metal rods on the butt block;Two the same end of the arc metal rod is commonly installed with a locking mechanism, and the two ends of the fixed frame are fixedly installed with two limiting mechanisms.Occupational advantages are as follows: first, arc metal rod is equipped with double elastic buffer of buffer spring, energy absorption adaptability is strong, and buffer compensation is more stable;Second, locking and bilateral limiting mechanism cooperate, realize flexible compensation and accurate location, guarantee busbar trajectory controllable;Third, abandon traditional insulator mechanical coupling design, and the anti-shock performance is greatly improved;Fourth, spring plate deformation linkage locking structure, can automatically improve busbar locking strength, more stable operation.

Description

Technical Field

[0001] This invention relates to the field of high-voltage cable connection technology, and in particular to a flexible connection device and method for ultra-high voltage busbars without support insulators. Background Technology

[0002] With the rapid advancement of my country's ultra-high voltage (UHV) power transmission projects, UHV busbars, as the core carriers of power transmission, directly determine the safe and stable operation of the entire power transmission system through their connection reliability, insulation performance, and ability to withstand complex working conditions. They are a key technical aspect in the construction of UHV substations and converter stations.

[0003] Currently, UHV busbar connections mainly employ two methods: rigid connections and traditional flexible connections. Most rely on supporting insulators to achieve both insulation and support functions. While rigid connections provide a certain level of mechanical strength, they suffer from significant technical drawbacks: the rigid structure cannot compensate for the axial expansion and contraction of the busbar due to thermal expansion and contraction, nor can it absorb lateral displacement and impact loads caused by earthquakes or equipment vibrations. Long-term operation can easily lead to loosening of the connection joints, fatigue cracking of hardware, and even insulator breakage, potentially causing major safety accidents such as busbar open circuits and insulation breakdown. Furthermore, rigid connections require extremely high installation precision, making it difficult to adapt to on-site issues such as deviations in civil construction and misalignment of equipment installations, significantly increasing construction difficulty and time costs.

[0004] To address the drawbacks of rigid connections, flexible busbar connection devices with flexible structures have gradually emerged in existing technologies. These devices utilize flexible components such as corrugated pipes and flexible conductors to achieve displacement compensation. However, these devices still generally rely on support insulators for mechanical support and insulation. Traditional support insulators often employ segmented support structures. These structures increase the mechanical coupling between the busbar and the insulator, reducing the overall seismic performance of the connection device and making it difficult to meet seismic requirements of AG5 and above.

[0005] Therefore, a novel flexible connection device and method for ultra-high voltage busbars without support insulators can be adopted to overcome the shortcomings of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art, and to propose a flexible connection device and method for ultra-high voltage busbars without support insulators.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A flexible connection device for ultra-high voltage busbars without support insulators includes insulators and two busbars, as well as a connection component;

[0009] The connection assembly includes a docking block that is fixedly connected to the insulator, and a fixing frame and two bow-shaped metal rods are fixedly installed on the docking block.

[0010] A locking mechanism is installed at the same end of the two bow-shaped metal rods. Two limiting mechanisms are fixedly installed at both ends of the fixing frame. The locking mechanism on the same side cooperates with the two limiting mechanisms on the same side. The two busbars pass through the corresponding locking mechanism and the corresponding two limiting mechanisms respectively.

[0011] Preferably, the bow-shaped metal rod is curved and a buffer spring is provided at the bend to provide support and tension for the bow-shaped metal rod.

[0012] Preferably, the locking mechanism includes a splicing block fixedly installed at the same end of two bow-shaped metal rods. A support shaft is rotatably installed on the splicing block. A fixed plate is fixedly installed on the support shaft, and a sliding plate is slidably installed on the support shaft. Two second adjusting bolts that cooperate with the sliding plate are rotatably installed on the fixed plate. A roller shaft that cooperates with the busbar is rotatably installed on the fixed plate. A circular hole for the roller shaft to slide is opened on the sliding plate. A tension structure that cooperates with the busbar is installed between the fixed plate and the sliding plate. A locking tooth is rotatably installed on each of the two second adjusting bolts. A locking bolt that cooperates with the corresponding locking tooth is threadedly installed on both the fixed plate and the sliding plate. A cone that cooperates with the locking tooth is fixedly installed at the end of the locking bolt.

[0013] Preferably, the tensioning structure includes two rotating shafts fixedly mounted on a fixed plate. The sliding plate has two holes for the corresponding rotating shafts to slide. A crank is fixedly mounted on each of the two rotating shafts. A rotating block is rotatably mounted on each of the two cranks. A connecting sleeve fitted onto the generatrix is ​​fixedly mounted on each of the two rotating blocks. A spring plate is fixedly mounted between the two cranks. The spring plate is equipped with a compression locking structure that cooperates with both locking teeth.

[0014] Preferably, the compression locking structure includes a fixed seat fixedly installed in the middle of the spring plate, two swing arms rotatably installed on the fixed seat, and a push-pull handle rotatably installed on each of the two swing arms, with the two push-pull handles fixedly connected to the corresponding locking teeth.

[0015] Preferably, the connecting sleeve is equipped with a rubber sleeve that abuts against the busbar, and the rubber sleeve is made of epoxy resin.

[0016] Preferably, the limiting mechanism includes a connecting block fixedly installed on a fixed frame, a first side plate fixedly installed on the connecting block, a sliding rod fixedly installed on the first side plate, a second side plate slidably installed on the sliding rod, two first adjusting bolts rotatably installed on the first side plate, the second side plate and the two first adjusting bolts are threaded rotatably connected, and two limiting wheels are rotatably installed on both the first side plate and the second side plate.

[0017] Preferably, two side wheels are rotatably mounted on both the first and second side plates, and the two side wheels are arranged perpendicularly to the two corresponding limiting wheels.

[0018] The present invention also provides a method for flexible connection of ultra-high voltage busbars without support insulators, including the above-mentioned flexible connection device for ultra-high voltage busbars without support insulators, and further including the following steps:

[0019] S1. First, pass the busbar through the limiting mechanism, locking mechanism and limiting mechanism located on the same side of the fixed frame in sequence. Then adjust the locking mechanism and limiting mechanism to ensure that the busbar will not detach from the locking mechanism and limiting mechanism.

[0020] S2. Next, the busbar is locked using the locking mechanism;

[0021] S3. When the busbar on either side swings or vibrates, the busbar will slide within the limiting mechanism. Since the locking mechanism locks the middle part of the busbar, the deviation of the busbar will have a pulling force on the locking mechanism. This force will pull the locking mechanism and cause the locking mechanism to produce a certain displacement.

[0022] S4. The displacement generated by the locking mechanism will pull the bow-shaped metal rod, causing it to deform and converting part of the tension into the elastic deformation internal energy of the bow-shaped metal rod, thereby offsetting part of the kinetic energy of the busbar offset.

[0023] Preferably, after the locking mechanism in S3 is displaced, the positions of the two limiting mechanisms remain unchanged, and the angle of the part of the busbar located between the two limiting mechanisms and the locking mechanism will change. At this time, the locking mechanism will limit the angle and prevent the angle from increasing, thereby limiting the offset of the busbar.

[0024] Compared with existing technologies, the advantages of this invention are:

[0025] 1. The UHV busbar flexible connection device without support insulators adopts an arc-shaped metal rod with a buffer spring at the bend to form a double elastic buffer structure. When the busbar is under tension, it drives the locking mechanism to move, which can efficiently convert the kinetic energy of the busbar offset into the elastic deformation internal energy of the arc-shaped metal rod. The buffer spring can also supplement the support and tension force of the metal rod, greatly improving the buffer compensation force and stability. Compared with a single flexible component, it has stronger adaptability to energy absorption and release and can cope with greater busbar tension and offset.

[0026] 2. When using the UHV busbar flexible connection device without supporting insulators, the locking mechanism and the double-sided limiting mechanism form a cooperative limiting system. The busbar can only slide directionally within the limiting mechanism. The locking mechanism locks the middle of the busbar and moves with it. At the same time, it can limit the increase of the busbar bending angle. This not only avoids the problem of irregular displacement and loosening of the busbar, but also reserves reasonable activity space for the axial expansion and contraction of the busbar due to thermal expansion and contraction. It achieves the dual effect of flexible compensation and precise limiting, ensuring that the trajectory of the busbar is controllable.

[0027] 3. When using the UHV busbar flexible connection device without supporting insulators, the device abandons the mechanical coupling design of traditional segmented supporting insulators and achieves flexible connection and buffering of the busbar only through the core connection components. This reduces the rigid connection nodes between the insulators and the busbars, structurally reducing the transmission efficiency of vibration and impact loads between components. It can better adapt to complex working conditions such as earthquakes and high-frequency vibration of equipment, easily meet the seismic requirements of AG5 level and above, and improve the overall vibration and impact resistance performance of the device.

[0028] 4. When using the UHV busbar flexible connection device without support insulators, the push-pull handle, swing arm and fixed seat are set. When the spring plate deforms, it drives the locking teeth to rotate, which increases the pressure between the locking teeth and the busbar, thereby improving the locking strength of the busbar and making the busbar more stable. Attached Figure Description

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of a flexible connection device for ultra-high voltage busbars without support insulators proposed in this invention.

[0031] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0032] Figure 3 for Figure 1 Detailed schematic diagram of the planar structure after rotation at a certain angle;

[0033] Figure 4 for Figure 3Detailed schematic diagram of the planar structure after rotation at a certain angle;

[0034] Figure 5 for Figure 1 Detailed enlarged schematic diagram of the structure after the insulator is removed;

[0035] Figure 6 for Figure 5 Detailed enlarged structural diagram after removing the busbar, locking mechanism, and limit mechanism;

[0036] Figure 7 for Figure 5 Detailed enlarged structural diagram of one of the locking mechanisms, limiting mechanisms, and busbars;

[0037] Figure 8 for Figure 7 Detailed schematic diagram of the enlarged structure of the middle limit mechanism;

[0038] Figure 9 for Figure 8 Detailed schematic diagram of the planar structure after rotation at a certain angle;

[0039] Figure 10 for Figure 7 Detailed schematic diagram of the enlarged structure of the locking mechanism;

[0040] Figure 11 for Figure 10 Detailed schematic diagram of the planar structure after rotation at a certain angle;

[0041] Figure 12 for Figure 10 Detailed schematic diagram of the structure after removing the sliding plate;

[0042] Figure 13 for Figure 12 Detailed schematic diagram of the planar structure after rotation at a certain angle;

[0043] Figure 14 for Figure 12 A detailed enlarged schematic diagram of the compression locking structure.

[0044] In the diagram: 1. Insulator; 2. Connecting assembly; 3. Connecting block; 4. Bow-shaped metal rod; 5. Fixing frame; 6. Locking mechanism; 7. Limiting mechanism; 8. Buffer spring; 9. Busbar; 10. Connecting block; 11. First side plate; 12. Second side plate; 13. Limiting wheel; 14. Side wheel; 15. First adjusting bolt; 16. Splicing block; 17. Sliding plate; 18. Fixing plate; 19. Roller shaft; 20. Second adjusting bolt; 21. Support shaft; 22. Crank; 23. Connecting sleeve; 24. Rotating block; 25. Spring plate; 26. Locking bolt; 27. Push-pull handle; 28. Swing arm; 29. ​​Fixing seat; 30. Locking tooth. Detailed Implementation

[0045] 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.

[0046] Example 1: Refer to Figures 1-9 A flexible connection device for ultra-high voltage busbars without support insulators includes an insulator 1 and two busbars 9, and also includes a connection component 2;

[0047] The connecting assembly 2 includes a docking block 3 that is fixedly connected to the insulator 1. A fixing frame 5 and two bow-shaped metal rods 4 are fixedly installed on the docking block 3.

[0048] A locking mechanism 6 is installed at the same end of the two bow-shaped metal rods 4. Two limiting mechanisms 7 are fixedly installed at both ends of the fixing frame 5. The locking mechanism 6 on the same side cooperates with the two limiting mechanisms 7 on the same side. The two busbars 9 pass through the corresponding locking mechanism 6 and the corresponding two limiting mechanisms 7 respectively.

[0049] The bow-shaped metal rod 4 is in the shape of a bow, and a buffer spring 8 is provided at the bend to provide support and tension for the bow-shaped metal rod 4.

[0050] The core function of the buffer spring 8 is to supplement the elastic support and tensile force of the bow-shaped metal rod 4, forming a double elastic buffer structure with the bow-shaped metal rod 4, and working together to absorb the tensile force and kinetic energy generated by the offset of the busbar 9.

[0051] The elastic deformation of the buffer spring 8 and the bow-shaped metal rod 4 work together to more efficiently convert the kinetic energy generated by the swing and vibration of the busbar into elastic deformation internal energy, which can counteract the force of the busbar 9 offset. The buffering effect is far better than the structure of a single bow-shaped metal rod 4.

[0052] The buffer spring 8 provides continuous support and tension for the bow-shaped metal rod 4, which can effectively alleviate the stress concentration problem at the bend of the bow-shaped metal rod 4, reduce fatigue wear caused by repeated deformation, and extend the service life of the component.

[0053] It can adapt to greater tension and offset of busbar 9, and can achieve stable flexible compensation under different degrees of displacement impact caused by thermal expansion and contraction of busbar 9, earthquakes or equipment vibration, so as to avoid component damage caused by rigid stress transmission.

[0054] The limiting mechanism 7 includes a connecting block 10 fixedly installed on the fixed frame 5. A first side plate 11 is fixedly installed on the connecting block 10. A sliding rod is fixedly installed on the first side plate 11. A second side plate 12 is slidably installed on the sliding rod. Two first adjusting bolts 15 are rotatably installed on the first side plate 11. The second side plate 12 is threadedly rotatably connected to the two first adjusting bolts 15. Two limiting wheels 13 are rotatably installed on both the first side plate 11 and the second side plate 12.

[0055] Rotate the first adjusting bolt 15 to bring the two limiting wheels 13 on the first side plate 11 and the second side plate 12 closer together. Then, pass the busbar 9 through the two sets of limiting wheels 13. Continue to rotate the first adjusting bolt 15 so that the side wheels 14 on the first side plate 11 and the second side plate 12 abut against the busbar 9. At this time, the busbar 9 is limited by the side wheels 14 and the limiting wheels 13 and will not shift to the left or right. It can only slide between the side wheels 14 and the limiting wheels 13.

[0056] Two side wheels 14 are rotatably mounted on both the first side plate 11 and the second side plate 12. The two side wheels 14 are arranged perpendicularly to the two corresponding limit wheels 13. This arrangement is to prevent the busbar 9 from contacting the first side plate 11 and the second side plate 12, which can effectively reduce friction and extend the service life of the busbar 9.

[0057] If the friction is too great, it will cause the conductive layer on the surface of the busbar 9 to be scratched and worn when it slides, which will damage the flatness of the conductive contact surface and form contact resistance. Reducing the friction can prevent the surface of the busbar 9 from being damaged, maintain the integrity of the conductive layer, ensure low contact resistance between the busbar 9 and the device, ensure the continuity of power transmission, and avoid local heating caused by excessive contact resistance.

[0058] If the friction is high, the displacement caused by thermal expansion and contraction and vibration of busbar 9 will be hindered, forming additional mechanical stress. This can easily lead to loosening and poor contact of the conductive connection points of busbar 9. Reducing the friction allows busbar 9 to slide freely in a directional manner, releases stress, ensures tight fit of conductive connection points, and avoids major safety hazards under ultra-high voltage conditions such as gap discharge and conduction interruption caused by loosening.

[0059] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 1-7 , Figures 10-14The locking mechanism 6 includes a splicing block 16 fixedly installed at the same end of two bow-shaped metal rods 4. A support shaft 21 is rotatably installed on the splicing block 16. A fixed plate 18 is fixedly installed on the support shaft 21, and a sliding plate 17 is slidably installed on the support shaft 21. Two second adjusting bolts 20 that cooperate with the sliding plate 17 are rotatably installed on the fixed plate 18. A roller shaft 19 that cooperates with the busbar 9 is rotatably installed on the fixed plate 18. A circular hole for the roller shaft 19 to slide is opened on the sliding plate 17. A tensioning structure that cooperates with the busbar 9 is installed between the fixed plate 18 and the sliding plate 17. A locking tooth 30 is rotatably installed on each of the two second adjusting bolts 20. A locking bolt 26 that cooperates with the corresponding locking tooth 30 is threadedly installed on both the fixed plate 18 and the sliding plate 17. A cone that cooperates with the locking tooth 30 is fixedly installed at the end of the locking bolt 26.

[0060] Rotating the second adjusting bolt 20 will cause the sliding plate 17 to move, so that the distance between the sliding plate 17 and the fixed plate 18 is slightly larger than the diameter of the busbar 9. The busbar 9 can move between the sliding plate 17 and the fixed plate 18, but will not be offset.

[0061] Next, the busbar 9 is passed through the roller 19 and pulled to tighten it. Then, the locking tooth 30 is rotated to make it abut against the busbar 9. Then, the locking bolt 26 is rotated. The rotation of the locking bolt 26 will drive the insert cone to move and make it abut against the locking tooth 30. As the locking bolt 26 is pushed forward, the contact position between the insert cone and the locking tooth 30 changes. The insert cone is cone-shaped, so it will increase the pressure between the locking tooth 30 and the busbar 9. In conjunction with the roller 19, the busbar 9 is clamped and locked.

[0062] The tension structure includes two rotating shafts fixedly installed on the fixed plate 18. The sliding plate 17 has two holes for the corresponding rotating shafts to slide. A crank 22 is fixedly installed on each of the two rotating shafts. A rotating block 24 is rotatably installed on each of the two cranks 22. A connecting sleeve 23 sleeved on the busbar 9 is fixedly installed on each of the two rotating blocks 24. A spring plate 25 is fixedly installed between the two cranks 22. The spring plate 25 is equipped with a compression locking structure that cooperates with the two locking teeth 30.

[0063] When the busbar 9 is pulled or vibrated, the busbar 9 will slide on the limiting mechanism 7 and pull the locking mechanism 6 downward, which will cause the locking mechanism 6 to move downward.

[0064] After the locking mechanism 6 moves down, as Figure 7As shown, the apex angle of the inverted V-shape formed by the busbar 9 between the two limiting mechanisms 7 and the locking mechanism 6 will increase. At this time, the crank 22 will rotate around the rotating shaft, and the connecting sleeve 23 will slide on the busbar 9. The two cranks 22 rotate in opposite directions, which will cause the top of the U-shaped spring plate 25 to expand and deform, so that the spring plate 25 has a certain restoring force, which can convert the kinetic energy of the locking mechanism 6 into the elastic potential energy of the spring plate 25, and convert a part of it into the deformation internal energy of the spring plate 25, thus preventing the locking mechanism 6 from moving downward.

[0065] The compression locking structure includes a fixed base 29 fixedly installed in the middle of the spring plate 25. Two swing arms 28 are rotatably installed on the fixed base 29. A push-pull handle 27 is rotatably installed on each of the two swing arms 28. The two push-pull handles 27 are fixedly connected to the corresponding locking teeth 30.

[0066] As the spring plate 25 deforms, the bottom of the spring plate 25 moves upward, which will drive the swing arm 28 to move. The swing arm 28 exerts a pressure force on the push-pull handle 27, which will drive the locking tooth 30 to rotate, increasing the pressure between the locking tooth 30 and the busbar 9, thereby increasing the friction between the locking tooth 30 and the busbar 9, making the busbar 9 more firmly fixed.

[0067] The connecting sleeve 23 has a rubber sleeve installed inside that abuts against the busbar 9. The rubber sleeve is made of epoxy resin. The purpose of setting the rubber sleeve here is to increase the friction and convert kinetic energy into the frictional internal energy of the rubber sleeve. After friction, high heat will be generated. At the same time, the conductivity of the busbar 9 will also generate a lot of heat. Therefore, the rubber sleeve here is made of epoxy resin, which has the characteristics of high temperature resistance.

[0068] The specific operating steps of this device are as follows:

[0069] First, pass the busbar 9 through the limiting mechanism 7, locking mechanism 6 and limiting mechanism 7 located on the same side of the fixed frame 5 in sequence. Then adjust the locking mechanism 6 and limiting mechanism 7 to ensure that the busbar 9 will not detach from the locking mechanism 6 and limiting mechanism 7.

[0070] Next, pull the busbar 9 to tighten it, then rotate the locking tooth 30 to make the locking tooth 30 abut against the busbar 9. After abutting, rotate the locking bolt 26 to make the cone abut against the upper part of the locking tooth 30. As the locking bolt 26 is pushed forward, the contact position between the cone and the locking tooth 30 changes. The cone is cone-shaped, so it will increase the pressure between the locking tooth 30 and the busbar 9. In conjunction with the roller 19, the busbar 9 is clamped to lock the busbar 9.

[0071] When either side of the busbar 9 is subjected to tension or vibration, the busbar 9 will slide within the limiting mechanism 7. Since the locking mechanism 6 locks the middle part of the busbar 9, the offset of the busbar 9 will have a pulling force on the locking mechanism 6. This force will pull the locking mechanism 6, causing the locking mechanism 6 to produce a certain displacement.

[0072] The displacement of the locking mechanism 6 will pull the bow-shaped metal rod 4, causing the bow-shaped metal rod 4 to deform, converting part of the tension into the elastic deformation internal energy of the bow-shaped metal rod 4, thereby offsetting part of the kinetic energy of the displacement of the busbar 9.

[0073] At the same time, the apex angle of the inverted V-shape formed by the busbar 9 between the two limiting mechanisms 7 and the locking mechanism 6 will increase. At this time, the crank 22 will rotate around the rotating shaft, and the connecting sleeve 23 will slide on the busbar 9. The two cranks 22 rotate in opposite directions, which will cause the top of the U-shaped spring plate 25 to expand and deform, so that the spring plate 25 has a certain restoring force, which can convert the kinetic energy of the locking mechanism 6 into the elastic potential energy of the spring plate 25, and convert a part of it into the deformation internal energy of the spring plate 25, which will prevent the locking mechanism 6 from moving down.

[0074] As the spring plate 25 deforms, the bottom of the spring plate 25 moves upward, which will drive the swing arm 28 to move. The swing arm 28 exerts a pressure force on the push-pull handle 27, which will drive the locking tooth 30 to rotate, increasing the pressure between the locking tooth 30 and the busbar 9, thereby increasing the friction between the locking tooth 30 and the busbar 9, making the busbar 9 more firmly fixed.

[0075] The relative displacement between the moving busbar 9 and the rubber sleeve generates friction, which converts kinetic energy into the frictional internal energy of the rubber sleeve, further offsetting some of the kinetic energy.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flexible connection device for ultra-high voltage busbars without support insulators, comprising insulators (1) and two busbars (9), characterized in that, It also includes a connection component (2); The connecting assembly (2) includes a docking block (3) fixedly connected to the insulator (1), and a fixing frame (5) and two bow-shaped metal rods (4) are fixedly installed on the docking block (3). A locking mechanism (6) is installed at the same end of the two bow-shaped metal rods (4). Two limiting mechanisms (7) are fixedly installed at both ends of the fixing frame (5). The locking mechanism (6) on the same side cooperates with the two limiting mechanisms (7) on the same side. The two busbars (9) pass through the corresponding locking mechanism (6) and the corresponding two limiting mechanisms (7) respectively. The locking mechanism (6) includes a splicing block (16) fixedly installed at the same end of two bow-shaped metal rods (4). A support shaft (21) is rotatably installed on the splicing block (16). A fixing plate (18) is fixedly installed on the support shaft (21), and a sliding plate (17) is slidably installed on the support shaft (21). Two second adjusting bolts (20) that cooperate with the sliding plate (17) are rotatably installed on the fixing plate (18). A roller shaft (19) that cooperates with the busbar (9) is rotatably installed on the fixing plate (18). The sliding plate (17) has a circular hole for the roller shaft (19) to slide. A tension structure that cooperates with the busbar (9) is installed between the fixed plate (18) and the sliding plate (17). A locking tooth (30) is rotatably installed on each of the two second adjusting bolts (20). A locking bolt (26) that cooperates with the corresponding locking tooth (30) is threadedly installed on both the fixed plate (18) and the sliding plate (17). A cone that cooperates with the locking tooth (30) is fixedly installed at the end of the locking bolt (26). The tensioning structure includes two rotating shafts fixedly installed on a fixed plate (18). The sliding plate (17) has two holes for sliding of the corresponding rotating shafts. A crank (22) is fixedly installed on each of the two rotating shafts. A rotating block (24) is rotatably installed on each of the two cranks (22). A connecting sleeve (23) sleeved on the busbar (9) is fixedly installed on each of the two rotating blocks (24). A spring plate (25) is fixedly installed between the two cranks (22). A compression locking structure that cooperates with the two locking teeth (30) is installed on the spring plate (25).

2. The UHV busbar flexible connection device without support insulators according to claim 1, characterized in that, The bow-shaped metal rod (4) is curved and a buffer spring (8) is provided at the bend to provide support and tension for the bow-shaped metal rod (4).

3. The UHV busbar flexible connection device without support insulators according to claim 1, characterized in that, The compression locking structure includes a fixed seat (29) fixedly installed in the middle of the spring plate (25). Two swing arms (28) are rotatably installed on the fixed seat (29). A push-pull handle (27) is rotatably installed on each of the two swing arms (28). The two push-pull handles (27) are fixedly connected to the corresponding locking teeth (30).

4. The UHV busbar flexible connection device without support insulators according to claim 1, characterized in that, The connecting sleeve (23) is equipped with a rubber sleeve that abuts against the busbar (9), and the rubber sleeve is made of epoxy resin.

5. The UHV busbar flexible connection device without support insulators according to claim 1, characterized in that, The limiting mechanism (7) includes a connecting block (10) fixedly installed on a fixed frame (5). A first side plate (11) is fixedly installed on the connecting block (10). A sliding rod is fixedly installed on the first side plate (11). A second side plate (12) is slidably installed on the sliding rod. Two first adjusting bolts (15) are rotatably installed on the first side plate (11). The second side plate (12) and the two first adjusting bolts (15) are connected by threads. Two limiting wheels (13) are rotatably installed on both the first side plate (11) and the second side plate (12).

6. The UHV busbar flexible connection device without support insulators according to claim 5, characterized in that, Two side wheels (14) are rotatably mounted on both the first side plate (11) and the second side plate (12), and the two side wheels (14) are arranged perpendicularly to the two corresponding limiting wheels (13).

7. A method for flexible connection of UHV busbars without support insulators, used in the UHV busbar flexible connection device without support insulators as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. First, pass the busbar (9) through the limiting mechanism (7), locking mechanism (6) and limiting mechanism (7) located on the same side of the fixed frame (5) in sequence. Then adjust the locking mechanism (6) and limiting mechanism (7) to ensure that the busbar (9) will not detach from the locking mechanism (6) and limiting mechanism (7). S2. Then, the busbar (9) is locked by the locking mechanism (6); S3. When the busbar (9) on either side swings or vibrates, the busbar (9) will slide within the limiting mechanism (7). Since the locking mechanism (6) locks the middle part of the busbar (9), the offset of the busbar (9) will have a pulling force on the locking mechanism (6), which will pull the locking mechanism (6) and cause the locking mechanism (6) to produce a certain displacement. S4. The displacement generated by the locking mechanism (6) will pull the bow-shaped metal rod (4) to deform the bow-shaped metal rod (4), converting part of the tension into the elastic deformation internal energy of the bow-shaped metal rod (4), thereby offsetting part of the kinetic energy of the offset of the generatrix (9).

8. The method for flexible connection of UHV busbars without support insulators according to claim 7, characterized in that, After the locking mechanism (6) in S3 above is displaced, the positions of the two limiting mechanisms (7) remain unchanged. The angle of the part of the busbar (9) between the two limiting mechanisms (7) and the locking mechanism (6) will change. At this time, the locking mechanism (6) will limit the angle and prevent the angle from increasing, thereby limiting the offset of the busbar (9).

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