Plug-in elbow-shaped lightning arrester
By incorporating the design of the inner nut in the plug and the anti-displacement retaining ring, the problems of loose internal threaded connections and plug displacement in the surge arrester are solved, achieving stable connection and efficient sealing of the surge arrester, and improving the protection and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-07
AI Technical Summary
During use, the threaded connection between the tightening nut inside the surge arrester and the special stud of the surge arrester may loosen or shift, resulting in poor contact. In addition, the surge arrester plug is easily affected by temperature or impact, which reduces the sealing protection performance and service life.
The design incorporates an inner nut and an anti-displacement ring. The inner nut is threaded to a surge arrester-specific stud, and the anti-displacement ring limits the position of the plug. The inner nut is made of metal, while the outer casing of the plug is made of rubber, ensuring connection stability and sealing.
It effectively prevents the internal threaded connection of the surge arrester from loosening and the plug from shifting, thereby improving the protection and safety of the surge arrester and enhancing its sealing performance and service life.
Smart Images
Figure CN224096501U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a plug-in elbow type lightning arrester. BACKGROUND
[0002] The plug-in elbow type lightning arrester is an important electrical protection device for protecting equipment from lightning overvoltage damage in the substation and transmission line. The existing European type rear connection lightning arrester has the following defects in the use process: the threaded connection between the tightening nut nut inside the lightning arrester and the lightning arrester special stud may be loose or displaced due to long-term use and changes in external environment, resulting in poor contact or failure of the lightning arrester, increasing the risk of lightning arrester failure; the lightning arrester plug is easily affected by temperature or impact, reducing the sealing protection performance and service life of the lightning arrester, and improvement and optimization are made for this. UTILITY MODEL CONTENTS
[0003] To solve the above problems, the technical problem to be solved by the utility model is to provide a plug-in elbow type lightning arrester.
[0004] The utility model discloses a plug-in elbow type lightning arrester adopts the technical scheme: its characterized in that including lightning arrester shell, lightning arrester inner core, lightning arrester special stud, tightening nut, lightning arrester plug, lightning arrester end cover and prevent moving baffle ring, the lightning arrester shell includes the horizontally arranged shell butt joint part and vertically arranged and is used for the shell mounting part of lightning arrester inner core placement, the shell butt joint part is equipped with shell butt joint channel, the lightning arrester special stud is fixedly connected with the upper end of lightning arrester inner core through the tightening nut, the lightning arrester plug includes plug outer package and plug inner nut, the plug outer package and the plug inner nut are integrally injection molded, the plug outer package includes plug cone body part and plug cylindrical part, the front end of plug cone body part is equipped with the plug front let go slot for the limiting of tightening nut, the plug inner nut is equipped with the plug internal thread in the plug inner nut, and the plug internal thread is communicated with the plug front let go slot and is used for the threaded connection of lightning arrester special stud, the outer wall of plug cylindrical part is equipped with the baffle ring positioning groove for the placement of prevent moving baffle ring, the prevent moving baffle ring is equipped with baffle ring adjusting opening, the rear end of shell butt joint channel is equipped with the plug built-in mouth corresponding to lightning arrester plug, the outer wall of shell butt joint part rear end is sequentially equipped with shell outer clamping groove and shell end baffle part from inside to outside, the shell outer clamping groove is equipped with shell anti-moving mouth corresponding to baffle ring adjusting opening and being used for the limiting of prevent moving baffle ring at the interval of circular arc.
[0005] The plug inner nut adopts metal material, and the plug outer package adopts rubber material.
[0006] The middle part of the outer wall of the plug inner nut is provided with an inner nut anti-moving boss, and the outer wall of the plug inner nut is provided with inner nut locking teeth arranged at intervals around the arc at the front and rear ends of the inner nut anti-moving boss.
[0007] The rear end of the cylindrical part of the plug is provided with a plug tightening groove, which facilitates the rotation and tightening of the surge arrester plug. The plug tightening groove has a square structure.
[0008] The surge arrester end cover is located at the rear end of the housing docking part, and includes an end cover body and end cover wrapping parts located at both ends of the end cover body. The end cover body is provided with end cover docking protrusions corresponding to the plug tightening groove.
[0009] The inner side of the end cap wrapping part is provided with an end cap locking block that engages with the outer slot of the housing.
[0010] The advantages of this pluggable elbow surge arrester are: the surge arrester plug limits the tightening of the nut and the surge arrester stud, while the anti-displacement ring limits the surge arrester plug, effectively preventing the loosening of the internal threaded connection and the displacement of the surge arrester plug, resulting in high protection and safety. Attached Figure Description
[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0012] Figure 1 This is a schematic diagram of the internal connection of the plug-in elbow arrester of this utility model;
[0013] Figure 2 This is a half-sectional view of the surge arrester housing of this utility model;
[0014] Figure 3 This is a schematic diagram of the front structure of the surge arrester plug of this utility model;
[0015] Figure 4 This is a schematic diagram of the anti-slip retaining ring of this utility model;
[0016] Figure 5 This is a schematic diagram of the structure of the plug inner nut of this utility model;
[0017] Figure 6 This is a schematic diagram of the back structure of the surge arrester plug of this utility model;
[0018] Figure 7 This is a half-sectional view of the surge arrester end cover of this utility model. Detailed Implementation
[0019] like Figures 1-7As shown, the plug-in elbow-type surge arrester of this utility model includes a surge arrester housing 1, a surge arrester inner core 2, a surge arrester-specific stud 3, a tightening nut 4, a surge arrester plug 5, a surge arrester end cap 6, and an anti-displacement ring 7. The surge arrester housing 1 includes a horizontally arranged housing docking portion 9 and a vertically arranged housing mounting portion 10 for inserting the surge arrester inner core 2. The housing docking portion 9 has a housing docking channel. The surge arrester-specific stud 3 is fixedly connected to the upper end of the surge arrester inner core 2 through the tightening nut 4. The surge arrester plug 5 includes a plug outer casing 11 and a plug inner nut 12. The plug outer casing 11 and the plug inner nut 12 are integrally injection molded. The plug outer casing 11 includes a plug cone portion 13 and a plug cylindrical portion 14. The front end of the plug cone portion 13 has a plug front clearance groove 15 for limiting the tightening nut 4. The plug inner nut 12 has a... The plug has an internal thread 16 that communicates with the front clearance groove 15 of the plug and is used for the threaded connection of the surge arrester special stud 3. The outer wall of the cylindrical part 14 of the plug has a retaining ring positioning groove 17 for the insertion of the anti-displacement retaining ring 7. The anti-displacement retaining ring 7 has a retaining ring adjustment opening 18. The rear end of the housing docking channel has a plug internal opening 19 corresponding to the surge arrester plug 5. The outer wall of the rear end of the housing docking part 9 has a housing external retaining groove 21 and a housing end stop 22 arranged sequentially from the inside to the outside. The housing external retaining groove 21 has a housing anti-displacement opening 23 that corresponds to the retaining ring adjustment opening 18 and is used to limit the anti-displacement retaining ring 7 at intervals around the arc. The surge arrester plug 5 realizes the limitation of the tightening nut 4 and the surge arrester special stud 3, and the anti-displacement retaining ring 7 limits the surge arrester plug 5, effectively preventing the loosening of the internal threaded connection of the surge arrester and the displacement of the surge arrester plug, with high protection and safety.
[0020] The inner nut 12 of the plug is made of metal, and the outer casing 11 of the plug is made of rubber to ensure sealing and insulation performance and connection strength.
[0021] The inner nut 12 of the plug has an anti-slip protrusion 25 in the middle of its outer wall. The inner nut 12 has locking teeth 26 arranged at intervals around the front and rear ends of the anti-slip protrusion 25. This further strengthens the connection between the inner nut 12 and the outer casing 11 after integral injection molding, effectively preventing loosening or breakage between the inner nut 12 and the outer casing 11, resulting in a more robust and stable structure.
[0022] The rear end of the cylindrical part 14 of the plug is provided with a plug tightening groove 28, which facilitates the rotation and tightening of the surge arrester plug 5. The plug tightening groove 28 has a square structure, which reduces the time and difficulty of installation and maintenance and improves the operating efficiency.
[0023] The surge arrester end cover 6 is installed on the rear end of the housing docking part 9. It includes an end cover body 30 and end cover wrapping parts 31 at both ends of the end cover body 30. The end cover body 30 is provided with end cover docking protrusions 32 corresponding to the plug tightening groove 28, which improves the mechanical stability and protection performance of the surge arrester.
[0024] The end cap wrapping part 31 is provided with an end cap locking block 33 that is locked in the outer slot 21 of the housing, which ensures high connection reliability.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.
Claims
1. A pluggable elbow-type surge arrester, characterized in that: The arrester assembly includes a surge arrester housing (1), a surge arrester core (2), a surge arrester stud (3), a tightening nut (4), a surge arrester plug (5), a surge arrester end cap (6), and an anti-shifting ring (7). The surge arrester housing (1) includes a horizontally arranged housing docking part (9) and a vertically arranged housing mounting part (10) for inserting the surge arrester core (2). The housing docking part (9) has a housing docking channel. The surge arrester stud (3) is fixedly connected to the upper end of the surge arrester core (2) through the tightening nut (4). The surge arrester plug (5) includes a plug outer casing (11) and a plug inner nut (12). The plug outer casing (11) and the plug inner nut (12) are integrally injection molded. The plug outer casing (11) includes a plug cone part (13) and a plug cylindrical part (14). The plug cone part (13) The front end is provided with a plug front clearance groove (15) for limiting the tightening nut (4). The plug inner nut (12) is provided with a plug inner thread (16) that communicates with the plug front clearance groove (15) and is used for threaded connection with the surge arrester special stud (3). The outer wall of the plug cylindrical part (14) is provided with a retaining ring positioning groove (17) for inserting the anti-displacement retaining ring (7). The anti-displacement retaining ring (7) is provided with a retaining ring adjustment opening (18). The rear end of the housing docking channel is provided with a plug internal opening (19) corresponding to the surge arrester plug (5). The outer wall of the rear end of the housing docking part (9) is provided with a housing outer slot (21) and a housing end stop (22) from the inside to the outside. The housing outer slot (21) is provided with a housing anti-displacement opening (23) that corresponds to the retaining ring adjustment opening (18) and is used for limiting the anti-displacement retaining ring (7) at intervals around the arc.
2. The plug-in elbow arrester according to claim 1, characterized in that: The inner nut (12) of the plug is made of metal, and the outer casing (11) of the plug is made of rubber.
3. The plug-in elbow arrester according to claim 2, characterized in that: The inner nut (12) of the plug has an anti-slip protrusion (25) in the middle of its outer wall, and the inner nut (12) of the plug has locking teeth (26) arranged around the front and rear ends of the anti-slip protrusion (25) in an arc.
4. The plug-in elbow arrester according to claim 1, characterized in that: The cylindrical part (14) of the plug is provided with a plug tightening groove (28) at the rear end, which facilitates the rotation and tightening of the surge arrester plug (5). The plug tightening groove (28) has a square structure.
5. The plug-in elbow arrester according to claim 4, characterized in that: The surge arrester end cap (6) is installed on the rear end of the housing docking part (9), and includes an end cap body (30) and end cap wrapping parts (31) provided at both ends of the end cap body (30). The end cap body (30) is provided with an end cap docking protrusion (32) corresponding to the plug tightening groove (28).
6. The plug-in elbow arrester according to claim 5, characterized in that: The end cap wrapping part (31) is provided with an end cap block (33) that is engaged in the outer slot (21) of the housing.