Wind-resistant grading ring for ultra-high voltage transmission line

Abstract

The invention discloses a wind-resistant grading ring for an ultra-high voltage transmission line, and relates to the technical field of transmission lines. According to the wind-resistant grading ring for the ultra-high voltage transmission line, due to the effect of wind power, the grading ring and a connecting and fixing position are loosened, the central positions of the grading ring and an insulator string deviate in a strong wind day, and the grading ring cannot be used; the inner clamping blocks and the side clamping blocks are arranged in the clamping grooves, the gaps between the inner clamping blocks and the side clamping blocks are bent at the edges of the clamping plates at the connecting positions, sliding between the clamping plates and the inner clamping plates is limited through the bent gaps, and in the using process, compared with the mode that after fixing is conducted through bolts, blowing of wind power is resisted only through friction force between the connecting positions, better stability is achieved; and the wind-resistant stability of the connecting position of the grading ring is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission lines, and particularly to an anti-wind voltage equalizing ring for ultra-high voltage transmission lines. Background Art

[0002] A voltage equalizing ring is an electrical device used in the power system. It is usually installed near the insulator string of the transmission line or the electrical equipment in the substation. The main function of the voltage equalizing ring is to improve the electric field distribution around the insulator string or the electrical equipment. In high-voltage transmission lines, due to the uneven capacitance distribution of the insulator string, the electric field intensity distribution on the insulator string is also uneven, which is likely to cause partial discharge at certain positions, affecting the insulation performance and service life of the equipment. The voltage equalizing ring can make the electric field distribution more uniform and reduce the local electric field intensity through its special structure and position, thereby improving the insulation performance of the insulator string and the electrical equipment. The voltage equalizing ring uses its own capacitance characteristics to change the electric field distribution. A capacitance network is formed between the voltage equalizing ring and the insulator string or the electrical equipment. By adjusting the size and distribution of the capacitance, the electric field is more evenly distributed on the surface of the insulator string or the equipment. Specifically, the presence of the voltage equalizing ring causes the electric field lines to bend and redistribute around it, dispersing the electric field originally concentrated at certain positions to the entire voltage equalizing ring and its nearby area, thereby achieving the purpose of voltage equalization;

[0003] When the voltage equalizing ring is in use, due to the action of wind force, the connection and fixing position of the voltage equalizing ring becomes loose, causing the center position of the voltage equalizing ring and the insulator string to shift on windy days, making the voltage equalizing ring unusable. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0005] An anti-wind voltage equalizing ring for ultra-high voltage transmission lines, comprising:

[0006] A fixing plate, the bottom of the fixing plate is fixedly installed with support feet, and the support feet are evenly installed along the center position of the fixing plate;

[0007] A support mechanism, the support mechanism is installed on the top of the fixing plate, and the support mechanism is installed on the top of the fixing plate;

[0008] A ring body mechanism, the ring body mechanism is installed on the top of the support mechanism;

[0009] The bottom end of the support foot inclines outward, and sliding grooves are formed on both sides of the bottom of the support foot. An inner hole plate is fixedly installed at the central position of the bottom of the support foot. Through holes are formed on the outer side of the inner hole plate, and the tops of both sides of the inner hole plate are inclined planes that incline inward from top to bottom. Side clamping blocks are slidably installed at the sliding groove positions of the support foot. Through the cooperation of the inclined planes between the side clamping blocks and the inner hole plate, during the fixed installation process, after the bolt is tightened, a gap is formed between the inner clamping block and the side clamping block, forming a zigzag at the edge of the clamping plate at the connection position. By using the zigzag gap, the sliding between the clamping plate and the inner clamping plate is restricted. During the use process, compared with only relying on the friction force between the connection positions to resist the blowing of the wind after being fixed by bolts, it has better stability, improving the wind resistance stability of the connection position of the grading ring. A protrusion adapted to the inclined plane of the inner hole plate is arranged at the top of the side clamping block close to the inner hole plate, and circular holes are formed on the outer sides of the side clamping blocks. A bolt is slidably installed between the side clamping blocks, and the bolt passes through the through hole of the inner hole plate.

[0010] Preferably, the support mechanism includes a connection disk. The connection disk is fixedly installed on the top of the fixed disk, and a support plate is fixedly installed on the outer side of the connection disk. The support plates are evenly installed along the center position of the connection disk. Support rods are fixedly installed on the tops of the support plates. The top ends of the support rods incline outward, and sleeve rings are fixedly installed at the top ends of the support rods. An inner ring is fixedly installed between the support rods. Through the cooperation of the inner ring and the support rods, the support rods are restricted from being supported, so that when the ring is blown by the wind or impacted by foreign objects, the pressure stability of the ring is improved, avoiding the deviation of the center position of the ring from the center position of the insulator string when the force is large, resulting in the abnormal use of the grading ring for electric field grading. Inner support rods are fixedly installed on the inner wall of the inner ring. The inner support rods are evenly installed along the center position of the inner ring.

[0011] Preferably, an inner cylinder is fixedly installed at one end of the inner support rod away from the inner ring. A top cover cylinder is fixedly installed at the top of the inner wall of the inner cylinder. The top cover cylinder is a conical cylinder with an outer diameter gradually increasing from top to bottom. Grid plates are fixedly installed on the tops of the inner support rods. Through the cooperation of the top cover cylinder and the water guide cover, during use, the rainwater is guided outward by the top cover cylinder, and at the same time, the water guide cover guides the rainwater guided by the top cover cylinder to the periphery away from the connection position between the insulator string and the iron tower, avoiding a large amount of rainwater pouring on the connection position, resulting in a short circuit of the transmission line. Arc-shaped through grooves are evenly formed on the top of the grid plate, and a water guide cover is fixedly installed at the bottom of the grid plate. The water guide covers correspond to the arc-shaped through grooves of the grid plate one by one, and the outer diameter of the water guide cover gradually increases from top to bottom.

[0012] Preferably, the ring body mechanism includes a first ring and a second ring. The outer side of the first ring is fixedly connected to the inner wall of the collar, and the first ring is located below the second ring. The diameter of the second ring is larger than that of the first ring. A connecting rod is fixedly installed between the second ring and the first ring. The connecting rods are evenly installed along the center position of the first ring. A grille cover is fixedly installed between the connecting rods. Rectangular grooves are evenly formed on the outer side of the grille cover, and the grille cover is located between the first ring and the second ring. A wind guide plate is fixedly installed on the outer side of the grille cover. By cooperating the wind guide plate with the grille cover, and using the grille slots of the grille cover and the downward inclination at the bottom end of the wind guide plate for cooperation, the wind guide plates are inclined and staggered with each other to form a stack, while ensuring the air circulation path, blocking the sundries driven by the wind, and preventing the sundries from contacting the transmission line to cause a short circuit. The wind guide plates are evenly installed along the central axis position of the grille cover, and the end of the wind guide plate away from the grille cover is inclined obliquely downward.

[0013] The present invention provides a wind-resistant voltage equalizing ring for ultra-high voltage transmission lines, which has the following beneficial effects:

[0014] First, for this wind-resistant voltage equalizing ring of the ultra-high voltage transmission line, through the cooperation of the inclined surfaces between the side clamping blocks and the inner hole plate, during the fixed installation process, after the bolts are tightened, a gap is formed between the inner clamping block and the side clamping block, and a zigzag is formed at the edge of the clamping plate at the connection position. By using the zigzag gap, the sliding between the clamping plate and the inner clamping plate is restricted. During use, compared with only relying on the friction force between the connection positions to resist the blowing of the wind after being fixed by bolts, it has better stability and improves the wind resistance stability of the connection position of the voltage equalizing ring.

[0015] Second, for this wind-resistant voltage equalizing ring of the ultra-high voltage transmission line, through the cooperation of the inner ring and the support rods, the support rods are restricted by the support, so that when the ring part is blown by the wind or impacted by foreign objects, the compression stability of the ring part is improved, and when the force is relatively large, the center position of the ring part and the center position of the insulator string will not deviate, resulting in the inability to use the uniform ring normally for electric field voltage equalization.

[0016] Third, for this wind-resistant voltage equalizing ring of the ultra-high voltage transmission line, through the cooperation of the top cover cylinder and the water guide cover, during use, the rainwater is guided outward by the top cover cylinder, and at the same time, the water guide cover guides the rainwater guided by the top cover cylinder to the periphery away from the connection position between the insulator string and the iron tower, avoiding a large amount of rainwater pouring on the connection position and causing a short circuit of the transmission line.

[0017] Fourth, for this wind-resistant voltage equalizing ring of the ultra-high voltage transmission line, through the cooperation of the wind guide plate and the grille cover, and using the grille slots of the grille cover and the downward inclination at the bottom end of the wind guide plate for cooperation, the wind guide plates are inclined and staggered with each other to form a stack, while ensuring the air circulation path, blocking the sundries driven by the wind, and preventing the sundries from contacting the transmission line to cause a short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural view of a wind-resistant voltage equalizing ring for a UHV transmission line according to the present invention;

[0019] Figure 2 FIG. is a bottom view of the structure of a wind-resistant voltage equalizing ring for a UHV transmission line according to the present invention;

[0020] Figure 3 FIG. is a partial bottom view of the structure of a wind-resistant voltage equalizing ring for a UHV transmission line according to the present invention;

[0021] Figure 4 FIG. is a partial side view of the structure of a wind-resistant voltage equalizing ring for a UHV transmission line according to the present invention;

[0022] Figure 5 FIG. is a schematic structural view of a support mechanism according to the present invention;

[0023] Figure 6 FIG. is a sectional view of the structure of a support mechanism according to the present invention;

[0024] Figure 7 FIG. is a top view of the sectional structure of a support mechanism according to the present invention;

[0025] Figure 8 FIG. is a schematic structural view of a ring body mechanism according to the present invention;

[0026] Figure 9 FIG. is a side view of the structure of a ring body mechanism according to the present invention.

[0027] In the figure: 1. Ring body mechanism; 2. Support mechanism; 3. Support feet; 4. Fixed plate; 5. Side clamping block; 6. Inner hole plate; 7. Bolt; 11. First ring; 12. Second ring; 13. Connecting rod; 14. Grille cover; 15. Air deflector; 201. Connection plate; 202. Support plate; 203. Support rod; 204. Sleeve ring; 205. Inner ring; 206. Water guide cover; 207. Top cover cylinder; 208. Inner support rod; 209. Inner cylinder; 210. Grille plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The first embodiment is as shown in Figures 1 to 4 and the present invention provides a technical solution:

[0030] A wind-resistant voltage equalizing ring for ultra-high voltage transmission lines, comprising:

[0031] A fixed plate 4, with support feet 3 fixedly installed at the bottom of the fixed plate 4, and the support feet 3 are evenly installed along the center position of the fixed plate 4;

[0032] A support mechanism 2, installed on the top of the fixed plate 4, and the support mechanism 2 is installed on the top of the fixed plate 4;

[0033] A ring body mechanism 1, installed on the top of the support mechanism 2;

[0034] The bottom end of the support foot 3 inclines outward, and sliding grooves are opened on both sides of the bottom of the support foot 3. An inner hole plate 6 is fixedly installed at the center position of the bottom of the support foot 3. It is connected to the support mechanism 2 through the fixed plate 4, and the inner hole plate 6 at the bottom of the support foot 3 is inserted into the clamping plate at the connection position. Then, a bolt 7 passes through the side clamping block 5 and the inner hole plate 6. By tightening the bolt 7 by the worker, the side clamping blocks 5 on both sides of the inner hole plate 6 are made to approach. Through holes are opened on the outer side of the inner hole plate 6, and the tops on both sides of the inner hole plate 6 are inclined surfaces that incline inward from top to bottom. Side clamping blocks 5 are slidably installed at the sliding groove positions of the support foot 3. During the process of tightening the bolt 7, they gradually approach the inner hole plate 6. By making the inclined surfaces on the tops of both sides of the inner hole plate 6 adapt to the inclined surfaces on the side of the side clamping block 5 close to the inner hole plate 6, a zigzag gap is formed at the edge of the clamping plate at the connection position during the gradual approaching process. When encountering strong winds, the swinging and pulling caused by the wind force are restricted through the zigzag gap, avoiding loosening at the connection position due to strong wind force and affecting the use of the voltage equalizing ring. A protrusion adapted to the inclined surface of the inner hole plate 6 is provided at the top of the side of the side clamping block 5 close to the inner hole plate 6, and round holes are opened on the outer sides of the side clamping blocks 5. A bolt 7 is slidably installed between the side clamping blocks 5, and the bolt 7 passes through the through hole of the inner hole plate 6.

[0035] Second embodiment, on the basis of the first embodiment, please refer to Figures 5 to 7 As shown, the support mechanism 2 includes a connection plate 201, the connection plate 201 is fixedly installed on the top of the fixed plate 4, and a support plate 202 is fixedly installed on the outer side of the connection plate 201. The support plates 202 are evenly installed along the center position of the connection plate 201. Support rods 203 are fixedly installed on the tops of the support plates 202. While connecting and fixing through the connection plate 201 and the fixed plate 4, the ring body mechanism 1 is supported by the support rods 203 and the collar 204, so that the ring body mechanism 1 surrounds the connection position between the insulator string and the transmission tower. The top ends of the support rods 203 incline outward, and collars 204 are fixedly installed at the top ends of the support rods 203. An inner ring 205 is fixedly installed between the support rods 203, and inner support rods 208 are fixedly installed on the inner wall of the inner ring 205. The inner support rods 208 are evenly installed along the center position of the inner ring 205.

[0036] One end of the inner strut 208 away from the inner ring 205 is fixedly installed with an inner cylinder 209. At the top of the inner wall of the inner cylinder 209, a top cover cylinder 207 is fixedly installed. The top cover cylinder 207 is a conical cylinder with an outer diameter gradually increasing from top to bottom. At the top of the inner strut 208, grid plates 210 are fixedly installed. Arc-shaped through grooves are evenly formed at the top of the grid plates 210. While providing support, the water guide cover 206 is used in cooperation with the grid plates 210. In rainy weather, due to the conical shape of the inner cylinder 209, rainwater is guided towards the position of the grid plates 210. At the same time, by using the arc-shaped through grooves of the grid plates 210, the rainwater is conducted downward. In cooperation with the water guide cover 206, the rainwater is guided outward, preventing the rainwater from flowing towards the connection position between the insulator string and the power transmission tower. And at the bottom of the grid plates 210, the water guide cover 206 is fixedly installed. The water guide cover 206 corresponds to the arc-shaped through grooves of the grid plates 210 one by one, and the outer diameter of the water guide cover 206 gradually increases from top to bottom.

[0037] The third embodiment is based on the first and second embodiments. Please refer to Figures 8 to 9 As shown, the ring body mechanism 1 includes a first ring 11 and a second ring 12. The outer side of the first ring 11 is fixedly connected to the inner wall of the sleeve ring 204, and the first ring 11 is located below the second ring 12. By cooperating with the first ring 11 and the second ring 12 and using the conductivity of their metal materials, the electric field is more evenly distributed on the surface of the insulator string. The diameter of the second ring 12 is larger than that of the first ring 11. A connecting rod 13 is fixedly installed between the second ring 12 and the first ring 11. The connecting rods 13 are evenly installed along the center position of the circle of the first ring 11.

[0038] Grid covers 14 are fixedly installed between the connecting rods 13. Rectangular grooves are evenly formed on the outer side of the grid covers 14, and the grid covers 14 are located between the first ring 11 and the second ring 12. Wind guide plates 15 are fixedly installed on the outer side of the grid covers 14. During use, in windy weather, the wind guide plates 15 guide the wind on the windward side. When the wind blows, due to the inclination at the bottom end of the wind guide plates 15, the wind guide plates 15 are stacked with each other and cooperate with the grid covers 14 to block the sundries driven by the wind from entering the interior. While making the electric field uniform, it prevents sundries from entering the connection position between the insulator string and the power transmission tower. The wind guide plates 15 are evenly installed along the axis center position of the grid covers 14, and the end of the wind guide plate 15 away from the grid cover 14 is inclined obliquely downward.

[0039] During use, the grading ring is installed at the connection position between the insulator string and the electric tower in the transmission line. A capacitive network is formed between the grading ring and the insulator string. By adjusting the size and distribution of the capacitance, the electric field is more evenly distributed on the surface of the insulator string. At the same time, during use, the ring body mechanism 1 is supported by the support mechanism 2, and at the same time, when it rains, the rainwater is guided.

[0040] When installing the grading ring, it is connected to the support mechanism 2 through the fixing plate 4. The inner hole plate 6 at the bottom of the support foot 3 is inserted into the clamping plate at the connection position. The bolt 7 passes through the side clamping block 5 and the inner hole plate 6. By the worker tightening the bolt 7, the side clamping blocks 5 on both sides of the inner hole plate 6 gradually approach the inner hole plate 6 during the process of tightening the bolt 7. Utilizing the slopes on the top of both sides of the inner hole plate 6 to match the slopes on the side of the side clamping block 5 close to the inner hole plate 6, a zigzag gap is formed at the edge of the clamping plate at the connection position during the gradual approach. When encountering strong winds, the zigzag gap is used to limit the force of the swing and pull caused by the wind, avoiding loosening of the connection position due to strong wind and affecting the use of the grading ring.

[0041] In the support mechanism 2, while being connected and fixed to the fixing plate 4 through the connection disk 201, the ring body mechanism 1 is supported by the support rod 203 and the collar 204, so that the ring body mechanism 1 surrounds the connection position between the insulator string and the transmission tower. At the same time, during the support, the water guide cover 206 and the grille plate 210 cooperate. In rainy weather, due to the conical shape of the inner cylinder 209, the rainwater is guided towards the grille plate 210 position. At the same time, using the arc-shaped through grooves of the grille plate 210, the rainwater is conducted downward, and in cooperation with the water guide cover 206, the rainwater is guided outward, preventing the rainwater from flowing towards the connection position between the insulator string and the power tower.

[0042] In the ring body mechanism 1, through the cooperation of the first ring 11 and the second ring 12, due to the conductivity of its metal material, the electric field is more evenly distributed on the surface of the insulator string. During use, when encountering strong winds, the wind on the windward side is guided by the wind guide plate 15. When the wind blows, due to the inclination at the bottom of the wind guide plate 15, the wind guide plates 15 are stacked and cooperate with the grille cover 14 to block the sundries driven by the wind from entering the interior. While making the electric field uniform, it prevents sundries from entering the connection position between the insulator string and the power tower.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind-resistant voltage equalizing ring for ultra-high voltage transmission lines, characterized in that, Comprising: A fixed disk (4), the bottom of the fixed disk (4) is fixedly installed with support feet (3), and the support feet (3) are evenly installed along the center position of the fixed disk (4); A support mechanism (2), the support mechanism (2) is installed on the top of the fixed disk (4), and the support mechanism (2) is installed on the top of the fixed disk (4); A ring body mechanism (1), the ring body mechanism (1) is installed on the top of the support mechanism (2); The bottom end of the support foot (3) is inclined outward, and both sides of the bottom of the support foot (3) are provided with chutes. The center position of the bottom of the support foot (3) is fixedly installed with an inner hole plate (6). Through holes are provided on the outer side of the inner hole plate (6), and the tops of both sides of the inner hole plate (6) are inclined surfaces that are inclined inward from top to bottom. Side clamping blocks (5) are slidably installed at the chutes of the support feet (3). A protrusion adapted to the inclined surface of the inner hole plate (6) is provided at the top of the side clamping block (5) close to the inner hole plate (6), and round holes are provided on the outer sides of the side clamping blocks (5). A bolt (7) is slidably installed between the side clamping blocks (5), and the bolt (7) passes through the through hole of the inner hole plate (6).

2. The anti-wind voltage equalizing ring for extra-high voltage transmission lines according to claim 1, characterized in that: The support mechanism (2) includes a connection disk (201), the connection disk (201) is fixedly installed on the top of the fixed disk (4), and a support plate (202) is fixedly installed on the outer side of the connection disk (201). The support plates (202) are evenly installed along the center position of the connection disk (201).

3. The anti-wind voltage equalizing ring for extra-high voltage transmission lines according to claim 2, characterized in that: Support rods (203) are fixedly installed on the tops of the support plates (202). The top ends of the support rods (203) are inclined outward, and collar rings (204) are fixedly installed at the top ends of the support rods (203).

4. The anti-wind voltage equalizing ring for an UHV transmission line according to claim 3, characterized in that: An inner ring (205) is fixedly installed between the support rods (203). An inner support rod (208) is fixedly installed on the inner wall of the inner ring (205). The inner support rods (208) are evenly installed along the center position of the inner ring (205).

5. The anti-wind voltage equalizing ring for extra-high voltage transmission lines according to claim 4, wherein: One end of the inner support rod (208) away from the inner ring (205) is fixedly installed with an inner cylinder (209). A top cover cylinder (207) is fixedly installed on the top of the inner wall of the inner cylinder (209). The top cover cylinder (207) is a conical cylinder with an outer diameter gradually increasing from top to bottom.

6. The anti-wind voltage equalizing ring for ultra-high voltage transmission lines according to claim 5, characterized in that: Grid plates (210) are fixedly installed on the tops of the inner support rods (208). Arc-shaped through grooves are evenly provided on the tops of the grid plates (210), and a water guide cover (206) is fixedly installed at the bottom of the grid plates (210). The water guide covers (206) correspond to the arc-shaped through grooves of the grid plates (210) one by one, and the outer diameter of the water guide covers (206) gradually increases from top to bottom.

7. The anti-wind voltage equalizing ring for a UHV transmission line according to claim 6, characterized in that: The ring body mechanism (1) includes a first ring (11) and a second ring (12). The outer side of the first ring (11) is fixedly connected to the inner wall of the collar ring (204), and the first ring (11) is located below the second ring (12). The diameter of the second ring (12) is larger than the diameter of the first ring (11).

8. The anti-wind voltage equalizing ring for ultra-high voltage transmission line according to claim 7, wherein: A connecting rod (13) is fixedly installed between the second ring (12) and the first ring (11), and the connecting rods (13) are evenly installed along the center position of the first ring (11).

9. The anti-wind voltage equalizing ring for UHV transmission line according to claim 8, characterized in that: A grille cover (14) is fixedly installed between the connecting rods (13). Rectangular grooves are evenly formed on the outer side of the grille cover (14), and the grille cover (14) is located between the first ring (11) and the second ring (12).

10. A wind-resistant voltage equalizing ring for ultra-high voltage transmission lines according to claim 9, characterized in that: An air guide plate (15) is fixedly installed on the outer side of the grille cover (14). The air guide plates (15) are evenly installed along the axial center position of the grille cover (14), and one end of the air guide plate (15) far away from the grille cover (14) is inclined downward obliquely.

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