Visual lightning protection and arc extinguishing device for internal gap of power transmission line

Abstract

The invention relates to the technical field of power transmission line arc extinguishing protection, in particular to a power transmission line inner gap visualization lightning protection arc extinguishing device. The invention provides the power transmission line inner gap visualization lightning protection arc extinguishing device which integrates efficient and safe arc extinguishing. Comprising an arc extinguishing area, a contact rod, a piston sleeve and the like, the arc extinguishing area is integrated in the lightning arrester and used for spraying out gas to extinguish electric arcs, the contact rod is arranged on the upper side in the arc extinguishing area and electrically connected with a wiring end of the lightning arrester, and the piston sleeve is movably arranged on the lower side in the arc extinguishing area and connected with the contact rod in a sleeved mode. The arc extinguishing area integrated in the lightning arrester sprays gas to extinguish electric arcs, so that electrical faults caused by lightning strokes can be effectively prevented; by means of the synergistic effect of the transmission assembly and the locking assembly, separation of the sleeve and the contact rod can be achieved in an extremely short time, a circuit is cut off in time, and then the safety of equipment and maintainers can be effectively protected; and the equipped warning assembly can monitor the current change in real time, and can quickly give an alarm when an abnormality is detected.

Description

Technical Field

[0001] This invention relates to the field of arc extinguishing protection technology for power transmission lines, specifically a visual lightning protection and arc extinguishing device for gaps within power transmission lines. Background Technology

[0002] With the continuous development of the power system and the continuous improvement of the power grid, there are more and more medium-voltage distribution network lines, and the lines are more complex. In recent years, there have been more and more special weather conditions. Thunderstorms have a great impact on the stable operation of the power grid. At best, they can cause line tripping. In severe cases, they can cause line breakage, equipment burnout, and even personal safety accidents, posing a very serious hidden danger to the safe operation of the power grid.

[0003] Currently, most line lightning protection systems use zinc oxide surge arresters or external gap multi-cavity surge arresters. Although zinc oxide surge arresters are widely used, they have the following problems:

[0004] (1) Zinc oxide surge arresters have high residual voltage due to the elimination of the series gap. Even after the surge arrester operates, the voltage it can limit is still relatively high, which may cause some damage to certain equipment.

[0005] (2) Because the metal electrode is subjected to a large current during discharge, it is easy to cause the metal to sublimate, resulting in the formation of a metal coating during discharge, which may affect the normal use of the surge arrester.

[0006] (3) The operational health status of zinc oxide surge arresters cannot be directly detected, which brings great difficulty to operation and maintenance. Once a zinc oxide surge arrester fails, it cannot be replaced in time, which brings great risks and losses to the lines and equipment. As for external gap multi-cavity surge arresters, the discharge distance is usually greatly shortened due to the influence of environmental humidity, rain and surface medium on the external gap. The fixed external gap discharge distance obviously cannot meet the requirements of lightning discharge and arc extinguishing in variable environments.

[0007] In conclusion, it is essential to develop a highly efficient and safe arc-extinguishing visual lightning protection and arc-extinguishing device for transmission line gaps. Summary of the Invention

[0008] To address the shortcomings of existing arc extinguishing devices, a new type of lightning protection arc extinguishing device that integrates efficient and safe arc extinguishing and provides visualization of gaps in transmission lines is proposed.

[0009] The technical solution of this invention is: a visual lightning protection and arc extinguishing device for gaps in transmission lines, comprising: a connecting seat, a base, and a surge arrester, wherein the base is spaced apart on the upper side of the connecting seat; the surge arrester is mounted on the base, and its upper side is provided with a terminal connected in parallel with the power line; it further comprises: a contact rod, a piston sleeve, an arc extinguishing zone, and an actuator, wherein the arc extinguishing zone is integrated inside the surge arrester and is used to eject gas to extinguish the arc; the contact rod is located on the upper side inside the arc extinguishing zone and is electrically connected to the terminal of the surge arrester; the piston sleeve is movably mounted in the arc extinguishing zone. The piston sleeve is located on its lower inner side and is sleeved with the contact rod. The actuator is located between the piston sleeve and the connecting seat and is used to momentarily control the piston sleeve to move downward and disconnect from the contact rod. The actuator includes a transmission assembly, a locking assembly, and a warning assembly. The transmission assembly is located between the connecting seat and the piston sleeve and is used to control the movement and adjustment of the piston sleeve to realize its opening, closing, and separation from the contact rod. The locking assembly is located at the bottom of the connecting seat and is used to control the locking and releasing of the transmission assembly. The warning assembly is located below the connecting seat and can work in conjunction with the transmission assembly to issue a timely warning.

[0010] Furthermore, the transmission assembly includes: a protective box, a movable frame, a guide rod, and a spring. The protective box is located at the bottom of the connecting seat, and each of the piston sleeves is electrically connected to the protective box housing. The movable frame is slidably disposed between the protective box and the connecting seat. The guide rod is located at the top inside the protective box, and the movable frame is movably sleeved on the guide rod. The spring is sleeved on the guide rod, with its upper end abutting against the flange of the guide rod and its lower end abutting against the movable frame.

[0011] Furthermore, the transmission assembly also includes: a transmission shaft, gears, and a rack. The transmission shaft is rotatably connected between each base. The gears are distributed on the transmission shaft via key connections. The racks are respectively connected to the upper end of the movable frame and the bottom of the piston sleeve, and the gears mesh with the racks. By controlling the movable frame to slide up and down, the rack drives the gears and the transmission shaft to rotate synchronously, thereby causing the piston sleeve to move down synchronously and disengage from the contact rod.

[0012] Furthermore, the locking assembly includes a guide seat and a clamping arm. The guide seat is located at the top of the protective box and near the guide rod. The clamping arm is symmetrically slidably mounted on the guide seat. When the two clamping arms approach each other, they can clamp and limit the movement of the frame. When the two clamping arms open, they can release the restriction on the movement of the frame.

[0013] Furthermore, the locking assembly also includes: a miniature electric telescopic rod, an adjusting seat, a hinge seat, a push arm, and a relay. The miniature electric telescopic rod is located on one side of the guide seat; the adjusting seat is connected to the telescopic shaft end of the miniature electric telescopic rod; the two hinge seats are respectively located on one side of the clamping arm; the two hinge seats and the adjusting seat are respectively hinged to the push arm; the relay is located on the other side of the guide seat, and the relay is electrically connected to the miniature electric telescopic rod and the current transformer in the power line.

[0014] Furthermore, the locking assembly also includes a guide sleeve, and the guide seat is further provided with a guide sleeve, and one end of the adjusting seat is slidably connected to the guide sleeve.

[0015] Furthermore, the warning assembly includes: a warning shell, an alarm, and a sensor. The warning shell is located at the bottom of the protective box and extends outward. The alarm is movably located inside the warning shell. The sensor is also located inside the warning shell and is electrically connected to the alarm.

[0016] Furthermore, the warning assembly also includes a pop-out component, which includes a push rod and an elastic element. The push rod is connected to the inside of the alarm and is slidably sleeved on the warning shell. When the moving frame moves down, it pushes the push rod to move synchronously so that the alarm can pop outward. The upper end of the push rod is sleeved with an elastic element, one end of which abuts against the push rod and the other end of which abuts against the warning shell.

[0017] Furthermore, it also includes: guide rails, with guide rails corresponding to the gears connected to the upper end of the movable frame, and a communicating guide groove provided between the top of the base and the bottom of the surge arrester for the rack and guide rails to be moved and adjusted.

[0018] Furthermore, the guide rail partially encloses the meshing teeth of the gear to guide the gear.

[0019] Beneficial effects: By extinguishing the electric arc with gas ejected from the arc-extinguishing zone integrated inside the surge arrester, electrical faults caused by lightning strikes can be effectively prevented; the synergistic action of the transmission and locking components enables the sleeve and contact rod to separate in a very short time, cutting off the circuit in time, thus effectively protecting the safety of equipment and maintenance personnel; the equipped warning component can monitor current changes in real time and issue a warning quickly when an anomaly is detected, further improving the safety of use; in addition, this device has a compact structure, is easy to install and maintain, and can effectively reduce the workload of on-site commissioning and maintenance. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is a diagram showing the contact state between the contact rod and the piston sleeve of the present invention.

[0023] Figure 4 This is a diagram showing the separation state of the contact rod and piston sleeve of the present invention.

[0024] Figure 5 This is a schematic diagram of the connection structure of the transmission shaft, gear, moving frame, guide rail and rack of the present invention.

[0025] Figure 6 This is a diagram showing the locking state of the clamping arm of the present invention on the movable frame.

[0026] Figure 7 This is a diagram showing the release state of the clamping arm of the present invention relative to the moving frame.

[0027] Figure 8 This is a diagram showing the open state of the push arm of the present invention.

[0028] Figure 9 This is a cross-sectional view of the warning structure of the present invention.

[0029] The meanings of the reference numerals in the diagram are as follows: 1-Connecting seat, 2-Base, 200-Guide groove, 3-Surge arrester, 4-Contact rod, 5-Piston sleeve, 6-Arc extinguishing zone, 7-Protective box, 8-Drive shaft, 80-Gear, 9-Moving frame, 90-Guide rail, 10-Rack, 11-Guide rod, 12-Spring, 13-Guide seat, 14-Clamping arm, 15-Miniature electric telescopic rod, 16-Adjusting seat, 17-Push arm, 18-Hinge seat, 19-Guide sleeve, 20-Relay, 21-Warning shell, 22-Alarm, 23-Sensor, 24-Push rod, 25-Elastic element. Detailed Implementation

[0030] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0031] Detailed Implementation: The present invention provides a visual lightning protection and arc extinguishing device for gaps within transmission lines, such as... Figures 1-9As shown, the device includes a connecting seat 1, a base 2, a surge arrester 3, a contact rod 4, a piston sleeve 5, an arc-extinguishing zone 6, and an actuator. The base 2 is spaced apart on the upper side of the connecting seat 1. The surge arrester 3 is mounted on the base 2, and its upper side is provided with a terminal connected in parallel with the power line. The arc-extinguishing zone 6 is integrated inside the surge arrester 3 and is used to eject gas to extinguish the arc. This gas is sulfur hexafluoride gas, which has excellent insulation properties and thermal stability. It can rapidly cool the arc and extinguish it under deionization, and the entire process can be completed within 100 milliseconds, thus achieving rapid and efficient arc extinguishing. The contact rod 4 is located inside the upper side of the arc-extinguishing zone 6 and is electrically connected to the terminal of the surge arrester 3. The piston sleeve 5 is movably located inside the lower side of the arc-extinguishing zone 6 and is sleeved with the contact rod 4. The actuator is located between the piston sleeve 5 and the contact rod 4. Between the connecting seat 1, a mechanism is used to momentarily control the piston sleeve 5 to move downward and disconnect from the contact rod 4. The actuator includes a transmission component, a locking component, and a warning component. The transmission component is located between the connecting seat 1 and the piston sleeve 5 and is used to control the movement and adjustment of the piston sleeve 5 to achieve its opening, closing, and separation from the contact rod 4. The locking component is located at the bottom of the connecting seat 1 and is used to control the locking and releasing of the transmission component. The warning component is located below the connecting seat 1 and can work in conjunction with the transmission component to issue a timely warning. Through the coordinated action of the transmission component, the locking component, and the warning component, the arc can be extinguished quickly, which helps to ensure the safety of power lines, equipment, and maintenance personnel. This addresses the issue of poor lightning protection performance caused by environmental factors affecting the external gap discharge of the surge arrester 3, and helps to improve the stability of lightning protection.

[0032] like Figures 1-5 As shown, as a further improved technical solution, the present invention may also include the following additional technical features: the transmission assembly includes a protective box 7, a movable frame 9, a guide rod 11, and a spring 12. The protective box 7 is located at the bottom of the connecting seat 1, and each piston sleeve 5 is electrically connected to the housing of the protective box 7. The movable frame 9 is slidably disposed between the protective box 7 and the connecting seat 1. The guide rod 11 is located at the top inside the protective box 7, and the movable frame 9 is movably sleeved on the guide rod 11. The spring 12 is sleeved on the guide rod 11, and the upper end of the spring 12 abuts against the flange of the guide rod 11, and the lower end abuts against the movable frame 9. The transmission assembly also includes a transmission shaft 8, a gear 80, and a rack 10. The transmission shaft 8 is rotatably connected between each base 2. The gear 80 is distributed on the transmission shaft 8 via a key connection. The rack 10 is connected to the upper end of the movable frame 9 and the bottom of the piston sleeve 5, and the gear 80 and the rack 10 mesh. By controlling the movable frame 9 to slide up and down, the rack 10 drives the gear 80 and the transmission shaft 8 to rotate synchronously, thereby causing the piston sleeve 5 to move down synchronously and disengage from the contact rod 4. This can achieve the purpose of synchronous linkage adjustment, with a rapid response, which is conducive to improving the safety of use.

[0033] like Figures 6-9As shown, as a further improved technical solution, the present invention may also include the following additional technical features: the locking assembly includes a guide seat 13 and a clamping arm 14. The guide seat 13 is located at the top of the protective box 7 and near the guide rod 11. The clamping arm 14 is symmetrically slidably disposed on the guide seat 13. When the two clamping arms 14 approach each other, they can clamp and limit the movement frame 9; when the two clamping arms 14 open, they can release the restriction on the movement frame 9. The locking assembly also includes a miniature electric telescopic rod 15, an adjusting seat 16, a push arm 17, a hinge seat 18, and a relay 20. The miniature electric telescopic rod 15 is disposed on one side of the guide seat 13. The adjusting seat 16 is connected to the telescopic shaft end of the miniature electric telescopic rod 15. The two hinge seats 18 are respectively disposed on one side of the clamping arm 14. A push arm 17 is hinged between the adjustment seat 16 and the guide seat 18. A relay 20 is located on the other side of the guide seat 13 and is electrically connected to the miniature electric telescopic rod 15 and the current transformer in the power line. When a fault occurs in the line and the current increases abnormally, the current transformer in the line transmits the abnormal signal to the relay 20, so that the relay 20 closes the circuit and controls the miniature electric telescopic rod 15 to work. The locking assembly also includes a guide sleeve 19, which is also provided on the guide seat 13. One end of the adjustment seat 16 is slidably connected to the guide sleeve 19. Through the synchronous linkage between the locking assembly and the transmission assembly, when the internal gap lightning protection and arc extinguishing device in the line is completely broken down, it can be disengaged in time to isolate the fault without affecting the normal operation of the line.

[0034] like Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, as a further improved technical solution, the present invention may also include the following additional technical features: the warning assembly includes a warning shell 21, an alarm 22, and a sensor 23. The warning shell 21 is located at the bottom of the protective box 7 and extends outward. The alarm 22 is movably disposed within the warning shell 21. The sensor 23 is also disposed within the warning shell 21, and the sensor 23 is electrically connected to the alarm 22. The warning assembly also includes a pop-out component, which includes a push rod 24 and an elastic element 25. The push rod 24 is connected to the alarm 22. The push rod 24 is slidably sleeved on the warning shell 21. An elastic element 25 is sleeved on the upper end of the push rod 24. One end of the elastic element 25 abuts against the push rod 24, and the other end abuts against the warning shell 21. The elastic element 25 is a compression spring, which is used to provide buffer protection when the alarm 22 pops out. Through the linkage of the transmission components, once the inner gap lightning protection and arc extinguishing device fails, the visual alarm 22 will pop out in time, which will facilitate the operation and maintenance or drone inspection to check for faults in the lightning arrester 3 and replace it in time.

[0035] In addition, such as Figure 4As shown, the present invention may also include the following additional technical features: it also includes a guide rail 90, the upper end of the movable frame 9 is connected to the guide rail 90 corresponding to the gear 80, and a communicating guide groove 200 is provided between the top of the base 2 and the bottom of the surge arrester 3 for the rack 10 and the guide rail 90 to be adjusted; and the guide rail 90 is partially wrapped around the meshing teeth of the gear 80 to guide the gear 80, which is beneficial to further improving the stability of the transmission components.

[0036] When the power line is connected and a lightning strike occurs, the current transformer in the line detects an abnormal current and sends a signal to the relay 20. The relay 20 then activates the miniature electric telescopic rod 15, which, through a preset program, controls the extension of the telescopic shaft of the miniature electric telescopic rod 15. This causes the adjusting seat 16 to drive the push arm 17 and the clamping arm 14 to open. When the clamping arm 14 is completely disengaged from the moving frame 9, the compressed spring 12 pushes the moving frame 9 downward. The moving frame 9 then drives the rack 10 on it to move downward synchronously. Through the transmission shaft 8 and the gear 80, the rack 10 pulls the piston sleeve 5 on it to move downward synchronously and disengage from the contact rod 4. A huge electric arc is generated at the moment of separation of the contact rod 4. At this time, the sulfur hexafluoride gas in the arc extinguishing zone 6 is compressed by the downward movement of the piston sleeve 5 and quickly sprayed into the arc area, thus achieving efficient and rapid arc extinguishing. When the circuit is completely disconnected, simply open the isolating switches on both sides to form a clear disconnection point, ensuring a safe working environment for power maintenance personnel. At the same time, as the moving frame 9 moves down, the squeezing push rod 24 and the alarm 22 will also move down simultaneously, so that the alarm 22 extends out of the warning shell 21, and then the sensor 23 will be triggered, so that the alarm 22 will emit a regular warning light and alarm sound to remind the power maintenance personnel, thereby facilitating the subsequent maintenance of the corresponding circuit.

[0037] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A visual lightning protection and arc extinguishing device for gaps within transmission lines, comprising: Connecting seat (1), the base (2) is spaced apart on the upper side of the connecting seat (1); A surge arrester (3), wherein the surge arrester (3) is mounted on a base (2), and its upper side is provided with a terminal block connected in parallel with the power line; characterized in that it further includes: Arc-extinguishing zone (6), which is integrated inside the surge arrester (3), is used to eject gas to extinguish the electric arc; Contact rod (4), the contact rod (4) is located on the upper side inside the arc extinguishing zone (6) and is electrically connected to the terminal of the surge arrester (3); Piston sleeve (5), the piston sleeve (5) is movably disposed inside the lower side of the arc extinguishing zone (6) and sleeved with the contact rod (4); The actuator is located between the piston sleeve (5) and the connecting seat (1) and is used to momentarily control the piston sleeve (5) to move downward and disconnect from the contact rod (4). The actuator includes: The transmission assembly is located between the connecting seat (1) and the piston sleeve (5) and is used to control the movement adjustment of the piston sleeve (5) to realize its opening and closing and separation from the contact rod (4); A locking assembly is located at the bottom of the connecting seat (1) and is used to control the locking and releasing of the transmission assembly; The warning component is located below the connecting seat (1) and can work in conjunction with the transmission component to issue a warning in a timely manner.

2. The transmission line gap visualization lightning protection and arc extinguishing device according to claim 1, characterized in that, The transmission assembly includes: The protective box (7) is located at the bottom of the connecting seat (1), and each piston sleeve (5) is electrically connected to the shell of the protective box (7). A movable frame (9) is slidably disposed between the protective box (7) and the connecting seat (1); Guide rod (11), the guide rod (11) is located at the top inside the protective box (7), and the movable frame (9) is movably sleeved on the guide rod (11); Spring (12) is sleeved on guide rod (11), with the upper end of spring (12) abutting against the flange of guide rod (11) and the lower end abutting against the movable frame (9).

3. The transmission line gap visualization lightning protection and arc extinguishing device according to claim 2, characterized in that, The transmission assembly also includes: A drive shaft (8) is rotatably connected between each base (2); Gears (80), which are distributed on the drive shaft (8) by key connection; The rack (10) is connected to the upper end of the moving frame (9) and the bottom of the piston sleeve (5), and the gear (80) meshes with the rack (10). By controlling the moving frame (9) to slide up and down, the rack (10) drives the gear (80) and the transmission shaft (8) to rotate synchronously, thereby causing the piston sleeve (5) to move down synchronously and disengage from the contact rod (4).

4. The transmission line gap visualization lightning protection and arc extinguishing device according to claim 2, characterized in that, The locking assembly includes: Guide seat (13), the guide seat (13) is located at the top of the protective box (7) and close to the guide rod (11); The clamping arms (14) are symmetrically slidably disposed on the guide seat (13). When the two clamping arms (14) approach each other, they can clamp and limit the movement frame (9); when the two clamping arms (14) open up to each other, they can release the restriction on the movement frame (9).

5. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 4, characterized in that, The locking assembly further includes: Miniature electric telescopic rod (15), wherein the miniature electric telescopic rod (15) is located on one side of the guide seat (13); Adjustment seat (16), the adjustment seat (16) is connected to the end of the telescopic shaft of the miniature electric telescopic rod (15); Hinged seats (18), the two hinged seats (18) are respectively provided on one side of the clamping arm (14); Push arm (17), the two hinge seats (18) and the adjustment seat (16) are respectively hinged to push arm (17); The relay (20) is located on the other side of the guide seat (13), and the relay (20) is electrically connected to the miniature electric telescopic rod (15) and the current transformer in the power line.

6. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 5, characterized in that, The locking assembly further includes: The guide sleeve (19) is also provided on the guide seat (13), and one end of the adjusting seat (16) is slidably connected to the guide sleeve (19).

7. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 2, characterized in that, The warning component includes: Warning shell (21), the warning shell (21) is located at the bottom of the protective box (7) and extends outward; An alarm (22) is movably disposed within a warning housing (21); Sensor (23) is also located inside the warning housing (21) and is electrically connected to the alarm (22).

8. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 7, characterized in that, The alert component further includes: a pop-up component, the pop-up component comprising: Push rod (24), the push rod (24) is connected to the inside of the alarm (22), and the push rod (24) is slidably sleeved on the warning shell (21). When the moving frame (9) moves down, it pushes the push rod (24) to move synchronously so that the alarm (22) can pop out. The elastic element (25) is sleeved on the upper end of the push rod (24), and one end of the elastic element (25) abuts against the push rod (24) and the other end abuts against the warning shell (21).

9. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 2, characterized in that it further... include: The upper end of the movable frame (9) is connected to the guide rail (90) corresponding to the gear (80), and a guide groove (200) is provided between the top of the base (2) and the bottom of the lightning arrester (3) for the rack (10) and the guide rail (90) to move and adjust.

10. A visual lightning protection and arc-extinguishing device for gaps within transmission lines according to claim 9, characterized in that, The guide rail (90) partially encloses the meshing teeth of the gear (80) to guide the gear (80).

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