A rear connection lightning arrester

Abstract

The utility model relates to a kind of rear lightning arresters. The technical problem to be solved by the utility model is to provide a rear lightning arrester. The technical scheme adopted by the utility model: including lightning arrester shell and lightning arrester rear cover assembly, the lightning arrester shell includes shell butt joint part and shell mounting part, shell butt joint part is equipped with shell butt joint passageway, lightning arrester rear cover assembly includes rear cover seat body, the rear cover end plate detachably fixed in the inner end of the rear cover seat body, rear cover butt joint component, rear cover butt joint component includes rear cover lock block, locking spring and lock block linkage column, the rear cover seat body includes rear cover seat body sealing plate, rear cover inner surrounding edge and rear cover peripheral edge are equipped on the rear cover seat body sealing plate. The utility model has the advantages that: the lock block locking head of rear cover lock block can be embedded in shell rear lock groove after assembly, the locking force of locking spring is used to continuously maintain locking state, prevent rear cover from being pulled out or rotated off at will, greatly improve the protection performance and anti-misassembly safety of rear lightning arrester.

Description

Technical Field

[0001] This utility model relates to a downstream surge arrester. Background Technology

[0002] As the end-protection component of the surge arrester housing, the surge arrester rear cover not only serves to seal, prevent dust and moisture, but also provides electrical insulation protection for the internal components. Its structural strength and locking reliability directly affect the overall protective performance and operational safety of the surge arrester. Existing surge arresters typically employ a simple mating structure where the rear cover is directly fitted onto the connection point of the surge arrester housing. This lack of a reliable mechanical locking connection allows operators to easily disassemble the rear cover, resulting in poor protection and prevention of misoperation. If the rear cover becomes loose or is accidentally removed during operation, it may expose live components inside the surge arrester, posing a safety hazard. Therefore, improvements and optimizations are needed to address this issue. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a downstream surge arrester.

[0004] The technical solution adopted by this utility model for a rear-mounted surge arrester is as follows: It includes a surge arrester housing and a surge arrester rear cover assembly covering the rear end of the surge arrester housing. The surge arrester housing includes a horizontally arranged housing docking portion and a vertically arranged housing mounting portion. The housing docking portion has a housing docking channel. The surge arrester rear cover assembly includes a rear cover seat, a rear cover end plate detachably fixed to the inner end of the rear cover seat, and a rear cover docking assembly. The rear cover docking assembly includes a rear cover locking block, a locking spring, and a locking block linkage post. The rear cover seat includes a rear cover seat sealing plate. The rear cover seat sealing plate has an inner rear cover edge and an outer rear cover edge. An inner rear cover seat cavity is formed between the inner rear cover edge and the outer rear cover edge. The inner rear cover edge covers the rear end of the housing docking portion. The inner edge of the cover has at least two rear cover locking holes spaced at an arc. The outer edge of the rear cover has a peripheral edge through hole corresponding to the rear cover locking holes. The rear cover locking block includes a locking block body that is movably placed in the inner cavity of the rear cover seat. The front end of the locking block body has a locking block locking head that passes through the rear cover locking holes. The outer wall of the rear end of the housing docking part has a housing rear locking groove for locking the locking block locking head. The locking block linkage column includes a linkage column body. The rear end of the locking block body has a locking block docking hole. The linkage column body passes through the peripheral edge through hole and is connected and fixed to the locking block docking hole. The locking spring is sleeved on the linkage column body, with one end abutting against the locking block body and the other end abutting against the inner wall of the outer edge of the rear cover.

[0005] The number of the rear cover lock and the number of the rear cover docking components are both two.

[0006] The inner cavity of the rear cover seat is provided with inner guide plates at both ends of the rear cover lock opening for limiting the movement of the lock block body.

[0007] The rear cover end plate includes an end plate body. The end plate body has an inner hole at its center for the rear end of the housing docking part to pass through. The diameter of the inner hole is the same as the inner diameter of the inner circumference of the rear cover. The outer end of the end plate body has an end plate insertion part that inserts into the inner cavity of the rear cover seat. The outer wall of the end plate insertion part has an end plate locking block. The outer periphery of the rear cover has a rear cover locking slot that engages with the end plate locking block.

[0008] The outer end of the linkage column is provided with a linkage column pull head located on the outer side of the outer perimeter of the rear cover.

[0009] The advantages of this utility model of a rear-mounted surge arrester are as follows: after assembly, the locking head of the rear cover locking block can be embedded in the rear locking groove of the housing, and the spring force of the locking spring is used to continuously maintain the locking state, preventing the rear cover from being pulled out or twisted off at will, which greatly improves the protective performance and anti-misoperation safety of the rear-mounted surge arrester. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a half-sectional view of the surge arrester of this utility model; Figure 2 This is a half-sectional view of the surge arrester housing of this utility model; Figure 3 This is an exploded view of the surge arrester rear cover assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the back cover seat of this utility model; Figure 5 This is a schematic diagram of the structure of the rear cover locking block of this utility model; Figure 6 This is a schematic diagram of the structure of the locking block linkage column of this utility model; Figure 7 This is a schematic diagram of the structure of the rear cover end plate of this utility model. Detailed Implementation

[0012] like Figure 1-7As shown, the surge arrester of this utility model includes a surge arrester housing 1 and a surge arrester rear cover assembly 2 covering the rear end of the surge arrester housing 1. The surge arrester housing 1 includes a horizontally arranged housing docking part 4 and a vertically arranged housing mounting part 5. The housing docking part 4 is provided with a housing docking channel 6. The surge arrester rear cover assembly 2 includes a rear cover base 9, a rear cover end plate 10 detachably fixed to the inner end of the rear cover base 9, and a rear cover docking assembly 11. The rear cover docking assembly 11 includes a rear cover locking block 12 and a lock. The rear cover seat 9 includes a rear cover seat plate 16, which is fitted with a spring 13 and a locking block linkage post 14. The rear cover seat plate 16 has an inner rear cover edge 17 and an outer rear cover edge 18. The inner rear cover edge 17 and the outer rear cover edge 18 form a rear cover seat cavity 19. The inner rear cover edge 17 covers the rear end of the housing docking part 4. The inner rear cover edge 17 has at least two rear cover locking holes 20 spaced around an arc. The outer rear cover edge 18 has an outer perimeter through hole 21 corresponding to the rear cover locking holes 20. The rear cover locking block 12 includes a locking block body 24 movably placed within the rear cover seat cavity 19. The front end of the locking block body 24 is provided with a locking block locking head 25 that passes through the rear cover locking opening 20. The outer wall of the rear end of the housing docking portion 4 is provided with a housing rear locking groove 7 for locking the locking block locking head 25. The locking block linkage column 14 includes a linkage column body 27. The rear end of the locking block body 24 is provided with a locking block docking hole 28. The linkage column body 27 passes through the peripheral side through hole 21 and engages with the locking block docking hole 28. 8. The locking spring 13 is sleeved on the linkage column 27, with one end abutting against the locking block body 24 and the other end abutting against the inner wall of the outer periphery 18 of the rear cover. After assembly, the locking block locking head 25 of the rear cover locking block 12 can be embedded in the rear locking groove 7 of the housing. The locking spring 13 is used to continuously maintain the locking state, so that a reliable mechanical locking connection is formed between the rear cover seat 9 and the surge arrester housing 1, preventing the rear cover from being pulled out or twisted off at will, which greatly improves the protection performance and anti-misoperation safety of the rear surge arrester.

[0013] The number of the rear cover locking slots 20 and the rear cover docking components 11 are both two, symmetrically distributed, with a balanced overall structure and high assembly precision.

[0014] The inner cavity 19 of the rear cover seat is provided with inner guide plates 22 at both ends of the rear cover lock opening 20 for limiting the movement of the lock block body 24, so as to prevent the lock block from swaying or getting stuck during the force process, ensuring smooth locking and unlocking actions, and improving the overall structural reliability.

[0015] The rear cover end plate 10 includes an end plate body 30. The end plate body 30 has an end plate inner hole 31 at its center for the rear end of the housing docking part 4 to pass through. The diameter of the end plate inner hole 31 is the same as the inner diameter of the inner circumference 17 of the rear cover. The outer end of the end plate body 30 has an end plate insertion part 32 that is inserted into the inner cavity 19 of the rear cover seat. The outer wall of the end plate insertion part 32 has an end plate locking block 33. The outer circumference 18 of the rear cover has a rear cover locking slot 34 that engages with the end plate locking block 33, making the connection between the end plate body 30 and the rear cover seat 9 more stable and preventing loosening or falling off during long-term operation.

[0016] The outer end of the linkage column body 27 is provided with a linkage column pull head 29 located outside the outer perimeter 18 of the rear cover. The operator only needs to pull the pull head to overcome the elastic force of the locking spring 13 and make the locking block locking head 25 exit the locking groove 7 of the housing, thereby realizing the quick disassembly of the rear cover seat 9, which maintains reliable locking and facilitates daily inspection and maintenance.

[0017] 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 rear-mounted surge arrester, comprising a surge arrester housing (1) and a surge arrester rear cover assembly (2) covering the rear end of the surge arrester housing (1), wherein the surge arrester housing (1) includes a housing docking portion (4) arranged laterally and a housing mounting portion (5) arranged vertically, and a housing docking channel (6) is provided in the housing docking portion (4), characterized in that: The surge arrester rear cover assembly (2) includes a rear cover seat (9), a rear cover end plate (10) detachably fixed to the inner end of the rear cover seat (9), and a rear cover docking assembly (11). The rear cover docking assembly (11) includes a rear cover locking block (12), a locking spring (13), and a locking block linkage column (14). The rear cover seat (9) includes a rear cover seat sealing plate (16). The rear cover seat sealing plate (16) is provided with an inner rear cover edge (17) and an outer rear cover edge (18). An inner cavity (19) of the rear cover seat is formed between the inner rear cover edge (17) and the outer rear cover edge (18). The inner rear cover edge (17) covers the rear end of the housing docking part (4). The inner rear cover edge (17) is provided with at least two rear cover locking holes (20) at intervals around an arc. The outer rear cover edge (18) is provided with a corresponding rear cover locking hole (20). The rear cover locking block (12) has an outer perimeter through hole (21). The rear cover locking block (12) includes a locking block body (24) that is movably placed in the inner cavity (19) of the rear cover seat. The front end of the locking block body (24) is provided with a locking block locking head (25) that passes through the rear cover locking opening (20). The outer wall of the rear end of the housing docking part (4) is provided with a housing rear locking groove (7) for locking the locking block locking head (25). The locking block linkage column (14) includes a linkage column body (27). The rear end of the locking block body (24) is provided with a locking block docking hole (28). The linkage column body (27) passes through the outer perimeter through hole (21) and is connected and fixed to the locking block docking hole (28). The locking spring (13) is sleeved on the linkage column body (27), with one end abutting against the locking block body (24) and the other end abutting against the inner wall of the outer perimeter (18) of the rear cover.

2. The surge arrester according to claim 1, characterized in that: The number of the rear cover locking slot (20) and the number of the rear cover docking assembly (11) are both two.

3. The surge arrester according to claim 1, characterized in that: The inner cavity (19) of the rear cover seat has inner guide plates (22) at both ends of the rear cover lock opening (20) for limiting the movement of the lock block body (24).

4. The surge arrester according to claim 1, characterized in that: The rear cover end plate (10) includes an end plate body (30). The end plate body (30) has an end plate inner hole (31) at its center for the rear end of the housing docking part (4) to pass through. The diameter of the end plate inner hole (31) is the same as the inner diameter of the inner circumference (17) of the rear cover. The outer end of the end plate body (30) has an end plate insertion part (32) that is inserted into the inner cavity (19) of the rear cover seat. The outer wall of the end plate insertion part (32) has an end plate locking block (33). The outer circumference (18) of the rear cover has a rear cover locking slot (34) that engages with the end plate locking block (33).

5. The surge arrester according to claim 1, characterized in that: The outer end of the linkage column body (27) is provided with a linkage column pull head (29) located outside the outer edge (18) of the rear cover.

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