Metal oxide lightning arrester and manufacturing method thereof

Abstract

The present invention discloses a metal oxide lightning arrester and a manufacturing method thereof, which relates to the technical field of electric high-voltage electrical appliances. The metal oxide lightning arrester comprises a connecting frame, an insulating pull rod, and at least two lightning arrester units, wherein the lightning arrester units are connected to the connecting frame, the connecting frame comprises a rotating frame at the bottom and a crossbeam frame at the top, the rotating frame is connected to a mounting position for connecting the bottom end of the lightning arrester unit, the crossbeam frame is connected to an elastic conductive component for abutting the top end of the lightning arrester unit, the top end of the lightning arrester unit is limited to the insulating pull rod, and a pull ring is provided at one or both ends of the insulating pull rod. A plurality of lightning arrester units are provided, which can be replaced by rotating frames and insulating pull rods and can be pulled directly on the ground by the pull rods, achieving the effect of facilitating rapid replacement in bad weather or when important node positions are damaged, so as to quickly restore the circuit protection function.

Description

Technical Field

[0001] The present invention relates to the technical field of electric high-voltage electrical appliances, and in particular to a metal oxide lightning arrester and a manufacturing method thereof. Background Art

[0002] The lightning arrester is connected between the cable and the ground, usually in parallel with the protected equipment. The lightning arrester can effectively protect related equipment. Once abnormal voltage occurs, the lightning arrester will take action to play a protective role. The metal oxide lightning arrester is an important protective device in the power system, used to protect electrical equipment from damage caused by lightning overvoltage and operating overvoltage.

[0003] However, although the metal oxide lightning arresters currently on the market have ways to remind replacement, such as self-falling or automatic counting, they cannot be replaced safely and quickly, resulting in the inability to quickly restore protection after damage, especially in severe weather or when important node locations are damaged, causing hidden dangers and losses. Summary of the Invention

[0004] The purpose of the present invention is to provide a metal oxide lightning arrester and a manufacturing method thereof, which is provided with multiple lightning arrester units, which are replaced by a rotating frame and an insulating pull rod. The arrester can be pulled directly on the ground by the pull rod, which is convenient for rapid replacement in severe weather or when important node positions are damaged, thereby restoring the protection function of the circuit.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A metal oxide lightning arrester includes a connecting frame, an insulating pull rod and at least two lightning arrester units. The lightning arrester units are connected to the connecting frame. The connecting frame includes a rotating frame at the bottom and a crossbeam frame at the top. The rotating frame is connected to a mounting position for connecting the bottom end of the lightning arrester unit. The crossbeam frame is connected to an elastic conductive component for the top end of the lightning arrester unit to abut. The top of the lightning arrester unit is limited on the insulating pull rod, and a pull ring is provided at one end or both ends of the insulating pull rod.

[0007] Furthermore, the elastic conductive component includes a conductive sheet and a compression spring on the upper side of the conductive sheet, one end of the compression spring abuts against the conductive sheet and the other end abuts against the crossbeam frame, pressing the conductive sheet against the upper end of the corresponding arrester unit.

[0008] Furthermore, there are two arrester units, and a rotation limiter is provided on the rotating frame, which limits the rotation angle of the rotating frame, and the limited rotation angle corresponds to the position where the two arrester units are respectively connected to the corresponding elastic conductive components.

[0009] Furthermore, the rotation limiter includes a limit block fixed in the connecting frame and a limit groove opened on the side of the rotating frame. The limit block is limited in the limit groove, and the position where the limit block abuts against the two ends of the limit groove corresponds to the position where the two lightning arrester units are respectively connected to the corresponding elastic conductive components.

[0010] Furthermore, the two lightning arrester monomers are symmetrically connected on both sides of the rotating frame. When the lightning arrester monomer on one side is connected to the corresponding elastic conductive component, the rotating frame and the other lightning arrester monomer tilt toward the other side, and the center of gravity shifts toward the other side and drives the corresponding end of the limit slot in the rotating frame to abut against the limit block.

[0011] Furthermore, the lightning arrester unit includes an end plate and an end block at the top, the end block is connected to the upper side of the end plate, and the end block abuts against the elastic conductive component, and two positioning holes are opened on the insulating pull rod. The positioning holes are waist-shaped holes, and the length is set along the insulating pull rod, so that one positioning hole is sleeved on the outside of the corresponding end block, and the other positioning hole is sleeved downward or upward from the outside of the other end block.

[0012] Furthermore, the bottom of the arrester unit is inserted downward into the rotating frame at the bottom.

[0013] Furthermore, a limiting groove is provided on the lower side of the conductive sheet, and the top end of the arrester unit abuts against the limiting groove.

[0014] The present invention also discloses a method for manufacturing a metal oxide surge arrester, comprising the following steps:

[0015] First, the corresponding lightning arrester monomers are pre-manufactured, and the lightning arrester monomers are used in pairs, one for backup and the other for use; the two lightning arrester monomers are installed on the rotating frame at the bottom, and then an insulating pull rod is installed on the top of the lightning arrester monomer; finally, the insulating pull rod is pulled so that the top of one of the lightning arrester monomers abuts against the elastic conductive component in the beam frame. When it is damaged or needs maintenance, the insulating pull rod is pulled to separate it from the corresponding elastic conductive component and the other lightning arrester monomer abuts against the corresponding elastic conductive component.

[0016] In summary, the present invention has the following beneficial effects:

[0017] Multiple arrester units are installed and replaced through rotating racks and insulating pull rods. They can be pulled directly on the ground through the pull rods, which facilitates rapid replacement in severe weather or when important nodes are damaged, thus restoring the circuit protection function.

[0018] When the arrester monomer on one side is connected to the corresponding elastic conductive component, the rotating frame and the other arrester monomer tilt toward the other side, the center of gravity shifts toward the other side and drives the corresponding end of the limit slot in the rotating frame to abut against the limit block. Under the action of gravity, a more stable connection between the arrester monomer and the corresponding elastic conductive component is achieved;

[0019] The insulating pull rod is conveniently disassembled through the positioning hole, so that one lightning arrester can be separated from another lightning arrester through the positioning hole while working stably, completing the disassembly and replacement of the other lightning arrester, which is convenient for its maintenance or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a metal oxide surge arrester of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0022] In the figure, 1. connecting frame; 11. rotating frame; 111. limiting groove; 12. crossbeam frame; 121. conductive sheet; 122. compression spring; 13. limiting block; 2. insulating pull rod; 21. pull ring; 22. positioning hole; 3. lightning arrester unit; 31. end plate; 32. end block; 4. insulating column unit. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. This embodiment does not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] A metal oxide arrester, such as Figure 1 As shown, it includes a connecting frame 1, an insulating pull rod 2 and at least two lightning arrester monomers 3. The connecting frame 1 includes an upper frame and a lower frame. The upper frame and the lower frame are connected at one end with an insulating column monomer 4 located between the two. At the other end, they are respectively connected to the upper beam frame 12 and the bottom rotating frame 11. The rotating frame 11 is rotatably connected to the lower frame through a rotating shaft. The lightning arrester monomer 3 is connected between the cross beam frame 12 and the bottom rotating frame 11.

[0025] In this embodiment, two lightning arrester units 3 are provided, and the rotating frame 11 is connected to the installation position for connecting the bottom end of the lightning arrester unit 3. The two lightning arrester units 3 are symmetrically connected to both sides of the rotating frame 11. Specifically, the bottom of the lightning arrester unit 3 is inserted downward into the rotating frame 11 at the bottom.

[0026] like Figure 1 As shown, the crossbeam 12 is connected to an elastic conductive component for the top end of the arrester unit 3 to abut against. The top end of the arrester unit 3 is connected to the power grid through the elastic conductive component and is grounded downward through the wiring at the bottom end of the arrester unit 3 (the rotating frame 11 is insulated) or the rotating frame 11 (the rotating frame 11 is conductive), so that the arrester unit 3 can play a protective role.

[0027] The elastic conductive component includes a conductive sheet 121 and a compression spring 122 on the upper side of the conductive sheet 121. One end of the compression spring 122 abuts against the conductive sheet 121, and the other end abuts against the crossbeam frame 12, pressing the conductive sheet 121 against the upper end of the corresponding lightning arrester unit 3 (a limiting groove is provided on the lower side of the conductive sheet 121, and the top of the lightning arrester unit 3 abuts against the limiting groove). The two conductive sheets 121 are connected to each other as a whole and connected upward to the power grid circuit.

[0028] like Figure 1 As shown, the top of the arrester unit 3 is limited on the insulating rod 2, and the two ends of the insulating rod 2 are integrally connected with a pull ring 21;

[0029] Among them, the lightning arrester unit 3 includes an end plate 31 and an end block 32 at the top. The end block 32 is smaller than the end plate 31. The end block 32 is integrally connected to the upper side of the end plate 31, and the end block 32 abuts against the limiting groove of the conductive plate 121. Two positioning holes 22 are opened on the insulating pull rod 2. The positioning holes 22 are waist-shaped holes, and the length is set along the insulating pull rod 2, so that one positioning hole 22 is sleeved on the outside of the corresponding end block 32, and the other positioning hole 22 is sleeved downward or upward from the outside of the other end block 32 (it can also set the insulating pull rod 2 to be elastic or partially elastic to set a smaller positioning hole 22 structure) to facilitate the replacement of the non-working lightning arrester unit 3.

[0030] like Figure 1 and Figure 2 As shown, the rotating frame 11 is further provided with a rotation limiter, which limits the rotation angle of the rotating frame 11, and the limited rotation angle corresponds to the position where the two lightning arrester monomers 3 are respectively connected to the corresponding elastic conductive components;

[0031] In this embodiment, the rotation limiter includes a limit block 13 fixed to the lower frame of the connecting frame 1 and a limit groove 111 provided on the side of the rotating frame 11. The limit block 13 is limited in the limit groove 111. The position where the limit block 13 abuts against the ends of the limit groove 111 corresponds to the position where the two lightning arrester monomers 3 are respectively connected to the corresponding elastic conductive components;

[0032] Among them, when the lightning arrester monomer 3 on one side is connected to the corresponding elastic conductive component, the rotating frame 11 and the other lightning arrester monomer 3 are tilted toward the other side, the center of gravity shifts toward the other side and drives the corresponding end of the limit groove 111 in the rotating frame 11 to abut against the limit block 13, and under the action of gravity, the corresponding lightning arrester monomer 3 is stably driven to connect with the elastic conductive component to ensure the reliability of the connection.

[0033] This embodiment also discloses a method for manufacturing a metal oxide surge arrester, comprising the following steps:

[0034] First, the corresponding lightning arrester monomers 3 are pre-manufactured. The lightning arrester monomers 3 are used in pairs, one for backup and the other for use.

[0035] One end of the connecting frame 1 is fixedly connected to the insulating column monomer 4, and the other end is used to install the two lightning arrester monomers 3 on the rotating frame 11 at the bottom, and then the insulating pull rod 2 is installed on the top of the lightning arrester monomer (through the positioning hole 22 and set outside the top end block 32 of the lightning arrester monomer 3);

[0036] Finally, the insulating pull rod 2 is pulled so that the top end of one of the arrester units 3 abuts against the elastic conductive component in the crossbeam 12;

[0037] When one of the working arrester monomers 3 is damaged or needs to be repaired, the insulating pull rod 2 is pulled on the ground to separate the working arrester monomer 3 from the corresponding elastic conductive component and the other arrester monomer 3 is brought into contact with the corresponding elastic conductive component;

[0038] After the weather is suitable, the workers at height are ready, and the new lightning arrester monomer 3 is in place and other installation conditions are met, climb up to replace the new lightning arrester monomer 3. Specifically, first remove the insulating rod 2 from the upper end of the lightning arrester monomer 3 to be replaced through the waist-shaped positioning hole 22, while keeping the insulating rod 2 connected to the other working lightning arrester monomer 3. The insulating rod 2 is rotated to a certain angle so that the lightning arrester monomer 3 to be replaced can be pulled out of the rotating frame 11 upward. After replacing the new lightning arrester monomer 3, the insulating rod 2 is reset.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A metal oxide surge arrester, characterized in that: It includes a connecting frame, an insulating pull rod and at least two lightning arrester units, wherein the lightning arrester units are connected to the connecting frame, the connecting frame includes a rotating frame at the bottom and a crossbeam frame at the top, the rotating frame is connected to the mounting position for connecting the bottom end of the lightning arrester unit, the crossbeam frame is connected to an elastic conductive component for the top end of the lightning arrester unit to abut, the top of the lightning arrester unit is limited to the insulating pull rod, and a pull ring is provided at one or both ends of the insulating pull rod; The elastic conductive component includes a conductive sheet and a compression spring on the upper side of the conductive sheet, one end of the compression spring abuts against the conductive sheet, and the other end abuts against the crossbeam frame, pressing the conductive sheet against the upper end of the corresponding lightning arrester unit; two lightning arrester units are provided, and a rotation limiter is also provided on the rotating frame. The rotation limiter limits the rotation angle of the rotating frame, and the limited rotation angle corresponds to the position where the two lightning arrester units are respectively connected to the corresponding elastic conductive components; The rotation limiter includes a limit block fixed in the connecting frame and a limit groove opened on the side of the rotating frame. The limit block is limited in the limit groove. The position where the limit block abuts against the two ends of the limit groove corresponds to the position where the two lightning arrester monomers are respectively connected to the corresponding elastic conductive components; the two lightning arrester monomers are symmetrically connected to both sides of the rotating frame. When the lightning arrester monomer on one side is connected to the corresponding elastic conductive component, the rotating frame and the other lightning arrester monomer tilt toward the other side, and the center of gravity shifts toward the other side and drives the corresponding end of the limit groove in the rotating frame to abut against the limit block.

2. A metal oxide surge arrester according to claim 1, characterized in that: The arrester unit includes an end plate and an end block at the top. The end block is connected to the upper side of the end plate and abuts against the elastic conductive component. Two positioning holes are opened on the insulating pull rod. The positioning holes are waist-shaped holes and the length is set along the insulating pull rod, so that one positioning hole is sleeved on the outside of the corresponding end block and the other positioning hole is sleeved downward or upward from the outside of the other end block.

3. A metal oxide surge arrester according to claim 2, characterized in that: The bottom of the arrester unit is inserted downward into the rotating frame at the bottom.

4. A metal oxide surge arrester according to claim 1 or 2, characterized in that: A limiting groove is provided on the lower side of the conductive sheet, and the top end of the arrester unit abuts against the limiting groove.

5. A method for manufacturing a metal oxide surge arrester according to claim 1, characterized in that: The following steps are included: First, the corresponding lightning arrester monomers are pre-manufactured, and the lightning arrester monomers are used in pairs, one for backup and the other for use; the two lightning arrester monomers are installed on the rotating frame at the bottom, and then an insulating pull rod is installed on the top of the lightning arrester monomer; finally, the insulating pull rod is pulled so that the top of one of the lightning arrester monomers abuts against the elastic conductive component in the beam frame. When it is damaged or needs maintenance, the insulating pull rod is pulled to separate it from the corresponding elastic conductive component and the other lightning arrester monomer abuts against the corresponding elastic conductive component.

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