Electrode connection structure of an external series gap lightning arrester

Abstract

The electrode connection structure of the out-of-band series gap arrester disclosed by the present invention is used to be arranged between the arrester body and the low-voltage gap electrode, so as to realize the control of the relative position and the gap distance between the low-voltage gap electrode and the high-voltage gap electrode by adjusting the relative position and the relative distance between the arrester body and the low-voltage gap electrode. The electrode connection structure of the out-of-band series gap arrester includes a first connecting piece and a second connecting piece. The first connecting piece is provided with a displacement groove for realizing the control of the relative position between the arrester body and the low-voltage gap electrode by fixing the arrester body at different positions of the displacement groove. The second connecting piece is connected to the low-voltage gap electrode and is provided with a plurality of displacement holes for realizing the control of the relative distance between the arrester body and the low-voltage gap electrode by fixing the displacement holes at different positions of the displacement groove.

Description

Technical Field

[0001] The present invention relates to the technical field of arrester manufacturing, and more specifically, to an electrode connection structure of an arrester with an external series gap. Background Art

[0002] In the transmission and transformation system line, as an important overvoltage protection device, the arrester is installed on the transmission tower, in parallel with the line insulator string, and is used to limit the lightning overvoltage of the transmission line and reduce the lightning flashover rate. Installing an arrester on the overhead transmission line is one of the important measures for lightning protection of the transmission line. Due to the overvoltage characteristics of the overhead transmission and distribution line, the particularity of installing an arrester on the overhead transmission and distribution line, and the requirement of maintenance-free, the arrester with an external series gap is widely used on the overhead transmission and distribution line.

[0003] In the prior art, mainly adding a metal cross arm on the tower is adopted to realize the installation of the arrester with an external series gap. However, due to the large variety of tower structures and types for installing the arrester with an external series gap, and the influence of the terrain and landform at the installation site on the position of the conductor, it is difficult to control the relative position and gap distance of the gap electrodes constituting the arrester with an external series gap, which in turn affects the protection performance and reliability of the arrester with an external series gap.

[0004] Therefore, how to flexibly control the relative position and gap distance of the gap electrodes of the arrester with an external series gap to ensure the reliability of the operation of the arrester with an external series gap has become a technical problem to be urgently solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an electrode connection structure of an arrester with an external series gap to flexibly control the relative position and gap distance of the gap electrodes of the arrester with an external series gap and ensure the reliability of the operation of the arrester with an external series gap.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An electrode connection structure of an arrester with an external series gap, which is used to be arranged between the arrester body and the low-voltage gap electrode, and realizes the control of the relative position and gap distance between the low-voltage gap electrode and the high-voltage gap electrode by adjusting the relative position and relative distance between the arrester body and the low-voltage gap electrode, including:

[0008] A first connecting piece, which is provided with a displacement groove, and the arrester body is fixed on the displacement groove through a first fastener, and is used to control the relative position between the arrester body and the low-voltage gap electrode;

[0009] The second connecting piece is provided with a plurality of displacement holes, which are fixed on the displacement groove by second fasteners and connected to the low-voltage gap electrode, and are used to control the relative distance between the arrester body and the low-voltage gap electrode.

[0010] Preferably, in the above electrode connection structure of the arrester with an external series gap, the first connecting piece includes:

[0011] A first limiting plate is provided with a first displacement groove for connecting with the arrester body, and the first displacement groove is arranged around the axis of the arrester body;

[0012] A second limiting plate is arranged at one end of the first limiting plate and is provided with a second displacement groove for connecting with the second connecting piece. The second displacement groove is arranged perpendicular to the axis of the arrester body. The displacement groove includes the first displacement groove and the second displacement groove.

[0013] Preferably, in the above electrode connection structure of the arrester with an external series gap, the first displacement groove is two arc grooves symmetrically arranged with respect to the axis of the arrester body.

[0014] Preferably, in the above electrode connection structure of the arrester with an external series gap, the first displacement groove takes the axis of the arrester body as the center of the circle, and the radian is not less than 80°.

[0015] Preferably, in the above electrode connection structure of the arrester with an external series gap, the arrester body is connected to the first limiting plate through an end flange, and the end flange is provided with flange positioning holes for bolt connection with the first displacement groove.

[0016] Preferably, in the above electrode connection structure of the arrester with an external series gap, the second displacement groove is a straight groove, and the length of the second displacement groove is not less than 300 mm.

[0017] Preferably, in the above electrode connection structure of the arrester with an external series gap, the displacement holes are arranged in multiple rows along the axial extension direction of the arrester body.

[0018] Preferably, in the above electrode connection structure of the arrester with an external series gap, the displacement holes are at least 4 rows, and 2 displacement holes are arranged in each row.

[0019] Preferably, in the above electrode connection structure of the arrester with an external series gap, the second connecting piece is provided with second plate connection holes for bolt connection with the low-voltage gap electrode.

[0020] Preferably, in the electrode connection structure of the out-of-band series gap arrester described above, both the first fastener and the second fastener are pinning anti-loosening bolts.

[0021] The electrode connection structure of the out-of-band series gap arrester provided by the present invention is used to be arranged between the arrester body and the low-voltage gap electrode, so as to realize the control of the relative position and gap distance between the low-voltage gap electrode and the high-voltage gap electrode by adjusting the relative position and relative distance between the arrester body and the low-voltage gap electrode. The electrode connection structure of the out-of-band series gap arrester includes a first connecting member and a second connecting member. The first connecting member is provided with a displacement groove, and the arrester body is fixed on the displacement groove through the first fastener, which is used to realize the control of the relative position between the arrester body and the low-voltage gap electrode by fixing the arrester body at different positions of the displacement groove. The second connecting member is provided with a plurality of displacement holes, and the displacement holes are fixed on the displacement groove through the second fastener and connected to the low-voltage gap electrode, which is used to realize the control of the relative distance between the arrester body and the low-voltage gap electrode by fixing the displacement holes at different positions of the displacement groove at different positions.

[0022] Compared with the prior art, the electrode connection structure of the out-of-band series gap arrester provided by the present invention can realize the adjustment of the relative position and relative distance between the arrester body and the low-voltage gap electrode, and further realize the control of the relative position and gap distance between the high-voltage gap electrode and the low-voltage gap electrode of the out-of-band series gap arrester, and can be applied to different types of poles and overhead lines, improving the protection performance and tolerance of the arrester, with reliable operation, simple structure and convenient disassembly and assembly. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic installation structure diagram of the electrode connection structure of the out-of-band series gap arrester disclosed in the embodiment of the present invention;

[0025] Figure 2 It is a schematic connection structure diagram of the arrester body and the first connecting member disclosed in the embodiment of the present invention;

[0026] Figure 3 It is a schematic partial structure diagram of the electrode connection structure of the out-of-band series gap arrester disclosed in the embodiment of the present invention;

[0027] Figure 4Schematic diagram of the structure of the low-voltage gap electrode disclosed in the embodiment of the present invention.

[0028] Among them, 100 is the arrester body, 110 is the end flange, 200 is the first connecting member, 210 is the first limiting plate, 211 is the first displacement groove, 220 is the second limiting plate, 221 is the second displacement groove, 300 is the second connecting member, 301 is the displacement hole, 400 is the low-voltage gap electrode, 410 is the annular electrode plate, 420 is the electrode connecting plate, and 421 is the first electrode connection hole. Detailed implementation manners

[0029] The core of the present invention is to disclose an electrode connection structure of an arrester with an external series gap, so as to flexibly control the relative position and gap distance of the gap electrode of the arrester with an external series gap, and ensure the reliability of the operation of the arrester with an external series gap.

[0030] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the invention described in the claims.

[0031] The arrester with an external series gap is divided into two types: an arrester with a support member gap and an arrester without a support member gap (the arrester without a support member gap is also called a pure air gap arrester). Among them, the arrester with a support member gap is composed of two electrodes respectively fixed at both ends of the composite insulation support member. The pure air gap arrester is composed of two electrodes. Usually, one electrode is fixed at the high-voltage end of the arrester body and is the low-voltage gap electrode, and the other electrode is fixed at the high-voltage end of the transmission line conductor or the insulator string and is the high-voltage gap electrode.

[0032] Since it is inconvenient to control the position and distance between the two electrodes of the pure air gap arrester in the prior art, in this regard, the inventor of the present application discloses the following electrode connection structure of an arrester with an external series gap, which is used to adjust the position and distance between the high-voltage gap electrode and the low-voltage gap electrode by changing the position and distance of the low-voltage gap electrode relative to the arrester body when the positions and distances of the arrester body and the high-voltage gap electrode are fixed.

[0033] Combined with Figures 1 to 4, the electrode connection structure of the external series gap arrester disclosed in the embodiments of the present invention is used to be arranged between the arrester body 100 and the low-voltage gap electrode 400, so as to realize the control of the relative position and gap distance between the low-voltage gap electrode 400 and the high-voltage gap electrode by adjusting the relative position and relative distance between the arrester body 100 and the low-voltage gap electrode 400. The electrode connection structure of the external series gap arrester includes a first connecting member 200 and a second connecting member 300. The first connecting member 200 is provided with a displacement groove, and the arrester body 100 is fixed on the displacement groove by a first fastener, which is used to realize the control of the relative position between the arrester body 100 and the low-voltage gap electrode 400 by fixing the arrester body 100 at different positions of the displacement groove. The second connecting member 300 is provided with a plurality of displacement holes 301, and the displacement holes 301 are fixed on the displacement groove by a second fastener and connected to the low-voltage gap electrode 400, which is used to realize the control of the relative distance between the arrester body 100 and the low-voltage gap electrode 400 by fixing the displacement holes 301 at different positions of the displacement groove at different positions. By changing the relative position of the first connecting member 200 relative to the arrester body 100 and the relative distance of the second connecting member 300 relative to the first connecting member 200, the relative position and relative distance between the arrester body 100 and the low-voltage gap electrode 400 can be adjusted.

[0034] Compared with the prior art, the electrode connection structure of the external series gap arrester disclosed in the embodiments of the present invention can realize the adjustment of the relative position and relative distance between the arrester body 100 and the low-voltage gap electrode 400, and further realize the control of the relative position and gap distance between the high-voltage gap electrode and the low-voltage gap electrode 400 of the external series gap arrester, and can be applied to different types of poles and overhead lines, improving the protection performance and tolerance of the arrester, with reliable operation, simple structure and convenient disassembly and assembly.

[0035] In a specific embodiment disclosed by the present invention, the first connecting member 200 includes a first limiting plate 210 and a second limiting plate 220.

[0036] The first limiting plate 210 is provided with a first displacement groove 211 for connecting with the arrester body 100. The displacement groove includes the first displacement groove 211, and the first displacement groove 211 is arranged around the axis of the arrester body 100. The first limiting plate 210 is connected to the arrester body 100, and the second limiting plate 220 is connected to the low-voltage gap electrode 400 through the second connecting member 300. Since the relative position between the first limiting plate 210 and the arrester body 100 can be adjusted through the first displacement groove 211, the relative position between the low-voltage gap electrode 400 and the arrester body 100 can be further adjusted. Further, combined with Figure 2 , the shape of the first limiting plate 210 can be adjusted according to actual needs to reduce weight and save costs.

[0037] Combined with Figure 3 , the second limiting plate 220 is arranged at one end of the first limiting plate 210 and is provided with a second displacement groove 221 for connecting with the second connecting member 300. The displacement groove includes the second displacement groove 221, and the second displacement groove 221 is arranged perpendicular to the axis of the arrester body 100. The second limiting plate 220 is connected to the arrester body 100 through the first limiting plate 210, and the second connecting member 300 is connected to the low-voltage gap electrode 400. Since the relative positions of the second limiting plate 220 and the second connecting member 300 can be adjusted through the second displacement groove 221, the relative position between the low-voltage gap electrode 400 and the arrester body 100 can be adjusted accordingly.

[0038] As Figure 2 shown, the first displacement groove 211 can be two arc grooves symmetrically arranged with respect to the axis of the arrester body 100. By installing the arrester body 100 at different positions in the first displacement groove 211, continuous adjustment of the rotation of the first limiting plate 210 around the axis of the arrester body 100 can be achieved. That is, for the arrester body 100, when other structures remain unchanged, the first limiting plate 210 can drive the low-voltage gap electrode 400 to rotate in a plane perpendicular to the axis of the arrester body 100, thereby adjusting the relative position between the arrester body 100 and the low-voltage gap electrode 400.

[0039] Furthermore, the first displacement groove 211 is centered on the axis of the arrester body 100 and has a radian of not less than 80°. It should be noted that the radian of the first displacement groove 211 can be designed according to actual situations.

[0040] In a specific embodiment disclosed in the present invention, the arrester body 100 is connected to the first limiting plate 210 through an end flange 110. The first fastener is a bolt. The end flange 110 is provided with at least one flange positioning hole for bolt connection with the first displacement groove 211, and the flange positioning hole is arranged at the edge of the end flange 110. By adjusting the relative positions of the flange positioning hole and the first displacement groove 211 and aligning their centerlines, and then using the first fastener for fixation, the connection between the arrester body 100 and the first limiting plate 210 can be achieved, and by adjusting the relative positions of the flange positioning hole and the first displacement groove 211, the relative position between the arrester body 100 and the low-voltage gap electrode 400 can be changed.

[0041] The second displacement groove 221 can be a straight groove, and the length of the second displacement groove 221 is not less than 300 mm. The second limiting plate 220 can be vertically arranged at one end of the first limiting plate 210. It should be noted that the length of the second displacement groove 221 can be designed according to the actual situation. By setting the second connecting member 300 at different positions in the second displacement groove 221, continuous adjustment of the relative distance between the two can be achieved, and further adjustment of the position between the arrester body 100 and the low-voltage gap electrode 400 can be realized.

[0042] In a specific embodiment disclosed in the present invention, the second connecting member 300 is provided with multiple rows of displacement holes 301 along the axial extension direction of the arrester body 100. The displacement holes 301 are used to connect with the first connecting member 200. By setting the first connecting member 200 on the displacement holes 301 at different positions, interval adjustment of the relative distance between the first connecting member 200 and the second connecting member 300 can be achieved, and further interval adjustment of the relative distance between the arrester body 100 and the low-voltage gap electrode 400 can be realized.

[0043] The low-voltage gap electrode 400 includes an electrode connecting plate 420 and an annular electrode plate 410. The electrode connecting plate 420 is arranged at the first end of the second connecting member 300 away from the first connecting member 200 for connecting with the second connecting member 300, and the connection between the electrode connecting plate 420 and the second connecting member 300 can be a bolt connection. Specifically, the electrode connecting plate 420 is provided with a first electrode plate connection hole 421, and the second connecting member 300 is provided with a second electrode plate connection hole corresponding to the first electrode plate connection hole 421.

[0044] Combined with Figure 4 , the annular electrode plate 410 is a long strip-shaped ring with a curvature made of a metal pipe. The electrode connecting plate 420 can be welded to the end face of the annular electrode plate 410 to form the low-voltage gap electrode 400, and the dispersion of the lightning impulse positive and negative polarity discharges of the arrester gap formed by the low-voltage gap electrode 400 is less than 5%.

[0045] In a specific embodiment disclosed in the present invention, the first displacement groove 211 is two arc grooves of 100° each, the second displacement groove 221 is a straight groove with a length of 600 mm, the displacement holes 301 are 5 rows, and 2 are arranged in each row. Both the first electrode plate connection hole 421 and the second electrode plate connection hole are two.

[0046] It should be noted that the number and positions of the displacement holes 301 and the first plate connection holes 421 can be designed according to actual situations. The displacement holes 301 are at least 4 rows and 8 in number, and the first plate connection holes 421 of the electrode connection plate 420 for bolt connection are at least one. The first fastener, the second fastener, and the bolts used for other bolt connections can all be pinning anti-loosening bolts, which have the advantages of superior anti-vibration performance, strong wear resistance, and high utilization rate.

[0047] When installing the electrode connection structure of the arrester with an external series gap, it is necessary to align the flange positioning hole with the center of the first displacement groove 211, connect it with the first fastener, and then rotate the first connector 200 along the direction of the arc groove so that it moves to the circumferential position required for installing the low-voltage gap electrode 400, and tighten the first fastener to complete the installation of the first connector 200 and the arrester body 100.

[0048] Select the displacement holes 301 at the required positions according to the installation and adjustment gap, align them with the center of the straight groove, and install the second fastener; adjust the relative positions of the first connector 200 and the second connector 300 along the extension direction of the straight groove. After adjustment, tighten the second fastener to complete the installation of the first connector 200 and the second connector 300.

[0049] Finally, align the center of the first plate connection hole 421 with that of the second plate connection hole, and tighten the corresponding pinning anti-loosening bolts to complete the installation of the low-voltage gap electrode 400 and the second connector 300.

[0050] The above installation sequence can be adjusted according to actual situations.

[0051] The terms "first" and "second" etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific sequence. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrode connection structure of a surge arrester with an external series gap, which is used to be arranged between a surge arrester body (100) and a low-voltage gap electrode (400), so as to control the relative position and gap distance between the low-voltage gap electrode (400) and a high-voltage gap electrode by adjusting the relative position and relative distance between the surge arrester body (100) and the low-voltage gap electrode (400). It is characterized in that Comprising: A first connecting member (200) is provided with a displacement groove, and the arrester body (100) is fixed on the displacement groove by a first fastener, and is used to control the relative position between the arrester body (100) and the low-voltage gap electrode (400); A second connecting member (300) is provided with a plurality of displacement holes (301), the displacement holes (301) are fixed on the displacement groove by a second fastener, and are connected to the low-voltage gap electrode (400), and are used to control the relative distance between the arrester body (100) and the low-voltage gap electrode (400), and the displacement holes (301) are arranged in multiple rows along the axial extension direction of the arrester body (100); The first connecting member (200) includes a first limiting plate (210) and a second limiting plate (220), the first limiting plate (210) is provided with a first displacement groove (211) for connecting with the arrester body (100), and the first displacement groove (211) is arranged around the axis of the arrester body (100); the second limiting plate (220) is arranged at one end of the first limiting plate (210), and is provided with a second displacement groove (221) for connecting with the second connecting member (300), the second displacement groove (221) is arranged perpendicular to the axis of the arrester body (100), and the displacement groove includes the first displacement groove (211) and the second displacement groove (221).

2. The electrode connection structure of the external series gap arrester according to claim 1, characterized in that The first displacement groove (211) is two arc grooves symmetrically arranged with respect to the axis of the arrester body (100).

3. The electrode connection structure of the external series gap lightning arrester according to claim 2, characterized in that The first displacement groove (211) is centered on the axis of the arrester body (100), and the radian is not less than 80°.

4. The electrode connection structure of the external series gap arrester according to claim 1, characterized in that The arrester body (100) is connected to the first limiting plate (210) through an end flange (110), and the end flange (110) is provided with flange positioning holes for bolt connection with the first displacement groove (211).

5. The electrode connection structure of the external series gap arrester according to claim 1, characterized in that The second displacement groove (221) is a straight groove, and the length of the second displacement groove (221) is not less than 300 mm.

6. The electrode connection structure of the external series gap lightning arrester according to claim 1, characterized in that The displacement holes (301) are at least 4 rows, and each row is provided with 2 displacement holes (301).

7. The electrode connection structure of the external series gap arrester according to claim 1, characterized in that, The second connecting member (300) is provided with second plate connection holes for bolt connection with the low-voltage gap electrode (400).

8. The electrode connection structure of the external series gap lightning arrester according to any one of claims 1 to 7, characterized in that, Both the first fastener and the second fastener are pin-type lock washers with bolts.

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