Length-adjustable electric power fitting socket clevis for high-voltage transmission line

Abstract

The invention discloses a length-adjustable electric power fitting socket clevis for a high-voltage transmission line, and relates to the field of power transmission and transformation line fittings, the length-adjustable electric power fitting socket clevis comprises a bowl seat, the bottom of the bowl seat is fixedly provided with a fixed seat, the bottom of the fixed seat is provided with a length stepping adjusting mechanism, and the bottom of the length stepping adjusting mechanism is provided with a clevis seat; a mounting hole is formed in the hanging plate seat, a mounting groove is formed in the bowl seat, and a penetrating cylinder is fixedly arranged at one end of the length stepping adjusting mechanism. According to the length-adjustable electric power fitting socket clevis for the high-voltage power transmission line, different power transmission line projects may have differences in the aspects of tower spacing, insulator chain length and the like; through the design of the five sets of clamping grooves and clamping columns, the length of the socket hanging plate can be flexibly adjusted according to actual installation requirements, the socket hanging plate can rapidly adapt to various different installation scenes, the requirement for transformation of other parts in the installation process is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of fittings for power transmission and transformation lines, and particularly to a bowl head hanger for high-voltage transmission lines with adjustable length. Background Art

[0002] In a power transmission line, the bowl head hanger plays the role of hanging an insulator string and a suspension clamp, and bears a large working stress. Its safety performance is crucial for the power transmission line. Currently, a W-shaped pin is generally used inside the bowl head hanger. In strong winds or other situations, the ball head is prone to shaking, thus squeezing the W-shaped pin, causing the W-shaped pin to deform or break, and then the ball head falls off, affecting the safe operation of the line. To solve the above problems, after searching, a Chinese patent with the publication number CN213602375U discloses a bowl head hanger for power transmission line fittings, which includes a bowl head hanger main body, a vertical hanger, a threaded rod, a rubber pad, and a first nut. A support plate is installed inside the bowl head hanger main body, and a first spring is installed above the support plate. A buffer plate is arranged above the first spring, and the buffer plate is connected to the support plate through the first spring. A ball socket is arranged inside the bowl head hanger main body. The upper side of the bowl head hanger main body is connected to a bowl head seat. The lower side of the bowl head hanger main body is provided with a vertical hanger. A threaded rod is arranged on the right side of the vertical hanger. A rubber pad is arranged on the outer side of the vertical hanger. A first nut is arranged on the left side of the vertical hanger. A threaded hole is arranged inside the vertical hanger. An inlet hole is arranged at the rear of the bowl head seat. A second spring is arranged at the end of the support plate. A groove is arranged inside the bowl head seat. A second nut is arranged inside the vertical hanger. A ball socket hole is arranged on the upper side of the bowl head seat. A ball head is arranged on the upper side of the bowl head seat. Although the above device can prevent the ball head from falling off due to the deformation of the support plate, in actual use, the length of the fitting bowl head cannot be adjusted. During the actual installation process, due to differences in different power transmission line structures, tower spacing, and insulator string lengths, if the length of the bowl head hanger cannot be adjusted, it may be difficult to accurately adapt to various specific installation scenarios, resulting in an increase in installation difficulty. Even additional auxiliary measures or modifications to other components may be required to achieve correct installation, which will consume more manpower, material resources, and time. Summary of the Invention

[0003] The purpose of the present invention is to provide a bowl head hanger for high-voltage transmission lines with adjustable length to solve the defects mentioned in the above background art.

[0004] To achieve the above object, a bowl head hanger for high-voltage transmission lines with adjustable length is provided, including a bowl seat. A fixing seat is fixedly installed at the bottom of the bowl seat. A length step adjustment mechanism is arranged at the bottom of the fixing seat. A hanger plate seat is arranged at the bottom of the length step adjustment mechanism. Mounting holes are formed on the hanger plate seat. An installation groove is formed inside the bowl seat. One end of the length step adjustment mechanism is fixedly provided with an insertion cylinder. The other end of the length step adjustment mechanism is fixedly provided with an adjustment seat. The end of the adjustment seat is fixedly connected to the fixing seat. The hanger plate seat is welded and fixed at the bottom of the insertion cylinder.

[0005] Further, a plurality of interference seats are uniformly and fixedly arranged on the outer side wall of the bowl seat. A plurality of interference seats are uniformly and fixedly arranged on the circumferential outer wall of the insertion cylinder. The distance between adjacent two groups of interference seats is the same. The cross-section of the interference seat is conical.

[0006] Further, the length step adjustment mechanism includes an adjustment seat, an insertion cylinder, a slot A, a slot B, a C slot, a D slot, an E slot and a clamping and stabilizing component. The adjustment seat and the insertion cylinder are of matching sizes. The insertion cylinder is inserted inside the adjustment seat.

[0007] Further, the axial cross-sections of the adjustment seat and the insertion cylinder are concentric circle structures. The adjustment seat is cylindrical. Slots A, B, C, D and E are respectively formed on the surface of the adjustment seat. Slots B, A, C, D and E are uniformly distributed on the circumferential outer wall of the adjustment seat from top to bottom.

[0008] Further, the cross-sections of the slots B, A, C, D and E are all C-shaped. The slots B, A, C, D and E are of the same size. A clamping column is clamped inside the slot B. A clamping and stabilizing component is installed at the top of the insertion cylinder.

[0009] Further, the clamping and stabilizing component includes a base, a guiding frame, guiding columns, a clamping column, a limiting piece, a spring and a guiding space. The base is arranged in two groups and is respectively fixedly connected to both sides of the top of the insertion cylinder. Guiding frames are fixedly connected to the tops of the two groups of bases.

[0010] Further, guiding spaces are respectively formed inside the two groups of guiding frames. The guiding spaces are elliptical. A clamping column is inserted inside the two groups of guiding frames. Both ends of the clamping column respectively pass through the two groups of guiding frames and are screwed and fixed to the limiting piece. The diameter of the limiting piece is larger than the width of the guiding space.

[0011] Further, the clamping column is cylindrical. Guiding columns are respectively fixedly arranged on both sides of the surface of the clamping column. Guiding holes are respectively formed at the tops of the two groups of guiding frames. The two groups of guiding columns are respectively inserted inside the two groups of guiding holes.

[0012] Furthermore, springs are sleeved on both groups of guide posts. The springs are arranged inside the guide space, and the two groups of guide posts are arranged in parallel.

[0013] Furthermore, the bowl seat and the hanging plate seat are combined to form a bowl head hanging plate. The length between the bowl seat and the hanging plate seat is adjusted by slot A, slot B, slot C, slot D, slot E and the clamping post. The distance between adjacent two groups of slots is the same, and the depth of the slot is equal to the radius of the clamping post.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the interference seats are conical in shape, and multiple groups of equally spaced interference seats form a structure for preventing birds from standing and building nests on the bowl head hanging plate. The multiple groups of equally spaced interference seats can prevent birds from staying and building nests on the bowl head hanging plate, reduce the occurrence probability of short-circuit faults, and ensure the stability of power supply; after setting multiple groups of equally spaced interference seats, the activities of birds in the vicinity are reduced, thereby reducing the risk of insulation performance degradation caused by bird excrement, etc., and improving the insulation reliability of the line; the multiple groups of equally spaced interference seats for bird prevention can prevent birds from defecating on the bowl head hanging plate, protect the fittings from fecal corrosion, and are beneficial to maintaining the good performance of the fittings; 2. In the present invention, the bowl seat and the hanging plate seat are combined to form a bowl head hanging plate, and the length between the bowl seat and the hanging plate seat is adjusted by slot A, slot B, slot C, slot D, slot E and the clamping post; different transmission line projects may have differences in aspects such as tower spacing and insulator string length; through the design of five groups of slots and clamping posts, the length of the bowl head hanging plate can be flexibly adjusted according to actual installation requirements, can quickly adapt to various different installation scenarios, reduce the need for modifying other components during the installation process, and improve the installation efficiency; when the transmission line needs to be modified, upgraded or encounters special situations, such as changing the voltage level of the line, increasing the transmission capacity, etc., it may be necessary to adjust the length of the fittings; the adjustable structure enables the bowl head hanging plate to easily adapt to these changes, without the need to replace the entire fitting, reduces the cost and workload of maintenance and upgrade, and improves the maintainability and expandability of the line; 3. In the present invention, multi-stage adjustment is realized by setting slot A, slot B, slot C, slot D and slot E, and the length of the bowl head hanging plate can be adjusted more accurately; different transmission line scenarios may have specific requirements for the length of the bowl head hanging plate, and this multi-stage adjustment can meet more detailed length adjustment requirements, enabling the bowl head hanging plate to better adapt to various specific working conditions and further optimizing the overall performance of the line; using the rebound of the compressed spring to prompt the clamping post to be clamped in the slot, the operation is relatively simple and convenient; when installing or adjusting the length of the bowl head hanging plate, only need to align the clamping post with the corresponding slot, and with the help of the elastic force of the spring, the clamping can be quickly completed, without complex tools or cumbersome operation processes, improving work efficiency. Description of the Drawings

[0015] Figure 1 Front view schematic diagram of the structure of the present invention; Figure 2 Axonometric drawing of the structure of the present invention; Figure 3 Structural Figure 2 Enlarged schematic diagram of part A in Figure 4 Structural Figure 1 Rear view of the present invention; Figure 5 Structural Figure 1 Top view of the present invention; Figure 6 Structural Figure 1 Cross-sectional view of the present invention; Figure 7 Structural Figure 6 Side view of the present invention; Figure 8 Structural Figure 6 Top view of the present invention.

[0016] [Reference numerals] 1, bowl base; 2, interference base; 3, installation groove; 4, fixed base; 5, hanging plate base; 6, installation hole; 7, length step adjustment mechanism; 70, adjustment base; 701, insertion cylinder; 71, card slot A; 711, card slot B; 72, C card slot; 73, D card slot; 74, E card slot; 75, card fixing and stabilizing component; 751, base; 752, guiding frame; 753, guiding column; 754, card column; 7541, limiting piece; 755, spring; 756, guiding space. Detailed implementation manners

[0017] Detailed implementation manner 1: Please refer to Figures 1-8 , the present invention provides a technical solution: a length-adjustable bowl head hanging plate for high-voltage transmission lines, including a bowl base 1, a fixed base 4 is fixedly installed at the bottom of the bowl base 1, a length step adjustment mechanism 7 is arranged at the bottom of the fixed base 4, a hanging plate base 5 is arranged at the bottom of the length step adjustment mechanism 7, an installation hole 6 is opened on the hanging plate base 5, an installation groove 3 is opened inside the bowl base 1, one end of the length step adjustment mechanism 7 is fixedly provided with an insertion cylinder 701, the other end of the length step adjustment mechanism 7 is fixedly provided with an adjustment base 70, the end of the adjustment base 70 is fixedly connected to the fixed base 4, and the hanging plate base 5 is welded and fixed at the bottom of the insertion cylinder 701.

[0018] Working principle: During actual use, multiple groups of equally spaced interference seats 2 are evenly arranged on the outer sides of the bowl seat 1 and the fixed seat 4. The interference seats 2 are conical in shape. The multiple groups of equally spaced interference seats 2 form a structure to prevent birds from perching and building nests on the bowl head hanger. When birds build nests near the bowl head hanger, they often use materials such as branches and iron wires. These materials may come into contact with the transmission line during wind blowing or bird activities, resulting in a short circuit of the line and causing a power outage accident. The multiple groups of equally spaced interference seats 2 can prevent birds from staying and building nests on the bowl head hanger, reducing the occurrence probability of short circuit faults and ensuring the stability of power supply. Bird feces or feathers may adhere to insulating components such as insulators, reducing their insulation performance and causing flashover phenomena. After setting the multiple groups of equally spaced interference seats 2, the activities of birds in the vicinity are reduced, thereby reducing the risk of insulation performance degradation caused by bird excrement, etc., and improving the insulation reliability of the line. When birds perch, jump or peck on the fittings, they may cause wear to equipment such as the bowl head hanger and the connected insulators, affecting the mechanical strength and sealing performance of the equipment. The multiple groups of equally spaced interference seats 2 make it difficult for birds to approach, thereby reducing the wear of the equipment caused by bird activities and extending the service life of the equipment. Bird feces have certain corrosiveness. Long-term accumulation on the surface of the fittings will accelerate the corrosion of the fittings, reducing their structural strength and electrical conductivity. The multiple groups of equally spaced anti-bird interference seats 2 can prevent birds from defecating on the bowl head hanger, protecting the fittings from fecal corrosion and being conducive to maintaining the good performance of the fittings. The bowl seat 1 and the hanger seat 5 are combined to form the bowl head hanger. The length between the bowl seat 1 and the hanger seat 5 is adjusted through the slot A71, slot B711, C slot 72, D slot 73, E slot 74 and the clamping post 754. Different transmission line projects may vary in aspects such as the tower spacing and the length of the insulator string. Through the design of the five groups of slots and the clamping post 754, the length of the bowl head hanger can be flexibly adjusted according to the actual installation requirements, quickly adapting to various different installation scenarios, reducing the need to modify other components during the installation process, and improving the installation efficiency. When the transmission line needs to be renovated, upgraded or encounters special situations, such as changing the voltage level of the line, increasing the transmission capacity, etc., it may be necessary to adjust the length of the fittings. The adjustable structure enables the bowl head hanger to easily adapt to these changes without replacing the entire fitting, reducing the costs and workload of maintenance and upgrading, and improving the maintainability and expandability of the line. The appropriate length of the bowl head hanger helps to optimize the suspension angle and tension of the insulator string, thereby improving the electrical performance of the transmission line. By adjusting the length through the five groups of slots and the clamping post 754, the position and state of the insulator string can be more precisely controlled, reducing the discharge voltage of the insulator string and the occurrence probability of flashover accidents, and ensuring the safe and stable operation of the line.The bowl seat 1 and the hanging plate seat 5 are combined to form a bowl head hanging plate. The specific length adjustment method of the bowl head hanging plate is as follows: Hold the installation groove 3 and the hanging plate seat 5 with both hands respectively. The operator needs to wear gloves to avoid being stabbed by the interference seat 2. At the same time, pull the installation groove 3 outward, so that the arc-shaped inner wall of the clamping groove B711 squeezes the circumferential outer wall of the clamping column 754, causing the clamping column 754 to move outward and squeeze the spring 755 thereon. At the same time, the spring 755 is sleeved on the outside of the guiding column 753. The setting of the guiding column 753 can limit and guide the clamping column 754 during movement, ensuring that the clamping column 754 will not tilt during movement. When the clamping column 754 is in a relative position with the clamping groove A71, the compressed spring 755 rebounds at this time, prompting the clamping column 754 to be clamped inside the clamping groove A71, completing the first-stage length adjustment of the bowl head hanging plate; the settings of the C clamping groove 72, D clamping groove 73, and E clamping groove 74 can realize multiple-stage adjustment of the length of the bowl head hanging plate. The settings of the clamping groove A71, clamping groove B711, C clamping groove 72, D clamping groove 73, and E clamping groove 74 to achieve multiple-stage adjustment can more accurately adjust the length of the bowl head hanging plate; different transmission line scenarios may have specific requirements for the length of the bowl head hanging plate. This multiple-stage adjustment can meet more detailed length adjustment needs, enabling the bowl head hanging plate to better adapt to various specific working conditions and further optimizing the overall performance of the line; using the rebound of the compressed spring 755 to prompt the clamping column 754 to be clamped in the clamping groove is relatively simple and convenient; when installing or adjusting the length of the bowl head hanging plate, only need to align the clamping column 754 with the corresponding clamping groove, and rely on the elastic force of the spring 755 to quickly complete the clamping, without complex tools or cumbersome operation processes, improving work efficiency; the way of the spring 755 rebounding and clamping can provide a relatively stable connection; the clamping column 754 is tightly clamped into the clamping groove under the action of the spring 755 and is not easily loosened due to the vibration of the line or other external forces, ensuring that the bowl head hanging plate can remain stable after being adjusted to a specific length, thus ensuring the safe and reliable operation of the line; when it is necessary to adjust or maintain the length of the bowl head hanging plate again, it is also relatively easy to operate; only need to overcome the elastic force of the spring 755 to take out the clamping column 754 from the clamping groove, and then can re-select the clamping groove for clamping according to needs, or check and maintain components such as the spring 755, reducing the maintenance cost and difficulty.

[0019] Specific Embodiment 2: This embodiment is a further limitation of Specific Embodiment 1. A plurality of groups of interference seats 2 are evenly and fixedly arranged on the outer side wall of the bowl seat 1. A plurality of groups of interference seats 2 are evenly and fixedly arranged on the circumferential outer wall of the insertion cylinder 701. The distance between adjacent two groups of interference seats 2 is the same. The cross-section of the interference seat 2 is conical.

[0020] Embodiment 3: This embodiment is a further limitation of Embodiment 1. The length step adjustment mechanism 7 includes an adjustment base 70, an insertion cylinder 701, a slot A71, a slot B711, a C slot 72, a D slot 73, an E slot 74, and a clamping and stabilizing assembly 75. The adjustment base 70 and the insertion cylinder 701 are of matching dimensions, and the insertion cylinder 701 is inserted inside the adjustment base 70.

[0021] Embodiment 4: This embodiment is a further limitation of Embodiment 3. The axial cross-sections of the adjustment base 70 and the insertion cylinder 701 are concentric circle structures. The adjustment base 70 is cylindrical. Slots A71, B711, C slot 72, D slot 73, and E slot 74 are respectively formed on the surface of the adjustment base 70. Slots B711, A71, C slot 72, D slot 73, and E slot 74 are evenly distributed from top to bottom on the circumferential outer wall of the adjustment base 70.

[0022] Embodiment 5: This embodiment is a further limitation of Embodiment 4. The cross-sections of the slots B711, A71, C slot 72, D slot 73, and E slot 74 are all C-shaped. The slots B711, A71, C slot 72, D slot 73, and E slot 74 are of the same size. A clamping post 754 is clamped inside the slot B711, and a clamping and stabilizing assembly 75 is installed at the top of the insertion cylinder 701.

[0023] Embodiment 6: This embodiment is a further limitation of Embodiment 5. The clamping and stabilizing assembly 75 includes a base 751, a guiding frame 752, a guiding post 753, a clamping post 754, a limiting piece 7541, a spring 755, and a guiding space 756. The base 751 is provided in two groups and is respectively fixedly connected to both sides of the top of the insertion cylinder 701. Guiding frames 752 are fixedly connected to the tops of the two groups of bases 751.

[0024] Embodiment 7: This embodiment is a further limitation of Embodiment 6. Guiding spaces 756 are respectively formed inside the two groups of guiding frames 752. The guiding spaces 756 are elliptical. A clamping post 754 is inserted inside the two groups of guiding frames 752. Both ends of the clamping post 754 respectively pass through the two groups of guiding frames 752 and are screwed and fixed to the limiting piece 7541. The diameter of the limiting piece 7541 is greater than the width of the guiding space 756.

[0025] Embodiment 8: This embodiment is a further limitation of Embodiment 7. The clamping post 754 is cylindrical. Guiding posts 753 are respectively and fixedly provided on both sides of the surface of the clamping post 754. Guiding holes are respectively formed at the tops of the two groups of guiding frames 752. The two groups of guiding posts 753 are respectively inserted inside the two groups of guiding holes.

[0026] Specific Embodiment Nine: This embodiment is a further limitation of Specific Embodiment Eight. Springs 755 are sleeved on both groups of guide posts 753. The springs 755 are arranged inside the guide space 756, and the two groups of guide posts 753 are arranged in parallel.

[0027] Specific Embodiment Ten: This embodiment is a further limitation of Specific Embodiment One. The bowl seat 1 and the hanging plate seat 5 are combined to form a bowl head hanging plate. The length between the bowl seat 1 and the hanging plate seat 5 is adjusted by the slot A71, slot B711, C slot 72, D slot 73, E slot 74 and the clamping post 754. The distance between adjacent two groups of slots is the same, and the depth of the slot is equal to the radius of the clamping post 754.

Claims

1. A strain clamp for high-voltage transmission lines with adjustable length, comprising a bowl base (1), characterized in that: A fixing base (4) is fixedly installed at the bottom of the bowl base (1). A length step adjustment mechanism (7) is arranged at the bottom of the fixing base (4). A hanging plate base (5) is arranged at the bottom of the length step adjustment mechanism (7). An installation hole (6) is formed in the hanging plate base (5). An installation groove (3) is formed inside the bowl base (1). One end of the length step adjustment mechanism (7) is fixedly provided with an insertion cylinder (701). The other end of the length step adjustment mechanism (7) is fixedly provided with an adjustment base (70). The end of the adjustment base (70) is fixedly connected to the fixing base (4). The hanging plate base (5) is welded and fixed to the bottom of the insertion cylinder (701).

2. The bowl head hanger fitting for high-voltage transmission lines with adjustable length according to claim 1, characterized in that: A plurality of interference bases (2) are uniformly and fixedly arranged on the outer side wall of the bowl base (1). A plurality of interference bases (2) are uniformly and fixedly arranged on the circumferential outer wall of the insertion cylinder (701). The distance between two adjacent interference bases (2) is the same. The cross section of the interference base (2) is conical.

3. The bowl head hanger for high-voltage transmission lines with adjustable length according to claim 1, characterized in that: The length step adjustment mechanism (7) includes an adjustment base (70), an insertion cylinder (701), a slot A (71), a slot B (711), a C slot (72), a D slot (73), an E slot (74), and a clamping and stabilizing assembly (75). The sizes of the adjustment base (70) and the insertion cylinder (701) are adapted to each other. The insertion cylinder (701) is inserted into the inside of the adjustment base (70).

4. The bowl head hanger for high-voltage transmission lines with adjustable length according to claim 3, characterized in that: The axial cross sections of the adjustment base (70) and the insertion cylinder (701) are concentric circle structures. The adjustment base (70) is cylindrical. Slots A (71), B (711), C (72), D (73), and E (74) are respectively formed on the surface of the adjustment base (70). The slots B (711), A (71), C (72), D (73), and E (74) are uniformly distributed on the circumferential outer wall of the adjustment base (70) from top to bottom.

5. The bowl head hanger fitting for high-voltage transmission lines with adjustable length according to claim 4, characterized in that: The cross sections of the slots B (711), A (71), C (72), D (73), and E (74) are all C-shaped. The sizes of the slots B (711), A (71), C (72), D (73), and E (74) are the same. A clamping post (754) is clamped inside the slot B (711). A clamping and stabilizing assembly (75) is installed at the top of the insertion cylinder (701).

6. The bowl head hanger for high-voltage transmission lines with adjustable length according to claim 5, characterized in that: The clamping and stabilizing assembly (75) includes a base (751), a guiding frame (752), a guiding post (753), a clamping post (754), a limiting piece (7541), a spring (755), and a guiding space (756). The base (751) is provided in two groups and is respectively fixedly connected to both sides of the top of the insertion cylinder (701). Guiding frames (752) are fixedly connected to the tops of the two groups of bases (751).

7. The bowl head hanger for high-voltage transmission lines with adjustable length according to claim 6, characterized in that: There are guiding spaces (756) opened inside both groups of guiding frames (752). The guiding spaces (756) are oval-shaped. A clamping post (754) is inserted through the inside of both groups of guiding frames (752). The two ends of the clamping post (754) respectively pass through the two groups of guiding frames (752) and are screwed and fixed to the limiting pieces (7541). The diameter of the limiting pieces (7541) is greater than the width of the guiding space (756).

8. The bowl head hanger for high-voltage transmission line with adjustable length according to claim 7, characterized in that: The clamping post (754) is cylindrical. Guide posts (753) are fixedly arranged on both sides of the surface of the clamping post (754). Guide holes are opened at the tops of both groups of guiding frames (752). The two groups of guide posts (753) are respectively inserted through the inside of the two groups of guide holes.

9. The bowl head hanger for high-voltage transmission lines with adjustable length according to claim 8, characterized in that: Springs (755) are sleeved on both groups of guide posts (753). The springs (755) are arranged inside the guiding spaces (756). The two groups of guide posts (753) are arranged in parallel.

10. A bowl head hanger for high-voltage transmission lines with adjustable length according to claim 7, characterized in that: The bowl base (1) and the hanging plate base (5) are combined together to form a bowl head hanging plate. The length between the bowl base (1) and the hanging plate base (5) is adjusted by the slot A (71), slot B (711), C slot (72), D slot (73), E slot (74) and the clamping post (754). The distance between adjacent two groups of slots is the same. The depth of the slot is equal to the radius of the clamping post (754).

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