A stable power distribution lightning arrester

Abstract

The application discloses a stable power distribution lightning arrester, which comprises a porcelain sleeve, a high-voltage electrode fixedly connected to the upper end of the porcelain sleeve, and a grounding electrode fixedly connected to the lower end of the porcelain sleeve; the lower end of the high-voltage electrode extends into the porcelain sleeve and forms a release part; the grounding electrode comprises a fixed part and a receiving part; the upper end of the fixed part is fixedly connected in the porcelain sleeve; the receiving part is arranged in the porcelain sleeve; the receiving part and the release part form a gap; a sliding seat is arranged on the lower end of the fixed part; the sliding seat is slidably connected with the fixed part; the sliding seat and the porcelain sleeve are connected through a spring; and the lower end of the sliding seat and the porcelain sleeve abut. The stable power distribution lightning arrester is not prone to breakage of the insulating sleeve.

Description

Technical Field

[0001] This invention relates to the field of line overvoltage protection devices, and in particular to a stable distribution surge arrester. Background Technology

[0002] When an existing line is struck by lightning, the surge arrester connected to the line will be punctured. When it punctures, the air pressure inside the surge arrester increases, which will cause the insulation sleeve of the surge arrester to rupture. On the one hand, the fragments generated by the rupture can easily cause danger; on the other hand, the surge arrester needs to be replaced in time, resulting in waste. Summary of the Invention

[0003] In order to solve the problem that the insulation sleeve of existing surge arresters is prone to breakage after being struck by lightning, this invention proposes a stable distribution surge arrester with an insulation sleeve that is not easily broken.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A stable distribution surge arrester includes a porcelain bushing. A high-voltage electrode is fixedly connected to the upper end of the porcelain bushing, and a grounding electrode is fixedly connected to the lower end of the porcelain bushing. The lower end of the high-voltage electrode extends into the porcelain bushing and forms a release part. The grounding electrode includes a fixing part and a receiving part. The upper end of the fixing part is fixedly connected inside the porcelain bushing, and the receiving part is disposed inside the porcelain bushing, forming a gap between the receiving part and the release part. A sliding seat is fitted onto the lower end of the fixing part. The sliding seat and the fixing part are slidably connected. The sliding seat and the porcelain bushing are connected by a spring, and the sliding seat abuts against the lower end of the porcelain bushing.

[0005] With the above setup, the porcelain bushing is less likely to break after a lightning strike. Specifically, the high-voltage electrode is connected to the overhead line, the grounding electrode is grounded, and a gap is formed between the release part and the receiving part. During normal operation of the overhead line, the current of the overhead line will not flow to the ground. After the overhead line is struck by lightning, the voltage of the overhead line increases, and the voltage of the high-voltage electrode also increases, causing the gap to break down. At this time, the current on the high-voltage electrode flows through the gap and the grounding electrode to the ground, thus reducing the voltage on the high-voltage electrode and the overhead line.

[0006] The sliding seat and the fixed part are sealed together, and the upper side of the sliding seat abuts against the lower end of the porcelain sleeve. Thus, the sliding seat and the grounding electrode seal the lower end of the porcelain sleeve, and the high-voltage electrode seals the upper end of the porcelain sleeve. At this time, a basically sealed space is formed inside the porcelain sleeve. When the gap is broken, the air pressure inside the porcelain sleeve rises, the sliding seat slides down along the fixed part and disengages from the porcelain sleeve, and the spring extends. At this time, the high-pressure gas inside the porcelain sleeve goes out between the sliding seat and the porcelain sleeve, and the air pressure inside the porcelain sleeve is reduced, thereby preventing the porcelain sleeve from cracking. After the lightning strike, under the action of the spring, the sliding seat slides up along the fixed part and abuts against the lower end of the porcelain sleeve again.

[0007] Furthermore, the fixing part is provided with a sliding groove, the upper end of which extends to the upper side of the fixing part, and the lower end of which is provided with a limiting plate. The limiting plate is fixedly connected to the fixing part. The sliding seat includes a sliding ring and a rotating ring. The sliding ring is sleeved on the fixing part and slidably connected to the fixing part. A limiting block adapted to the sliding groove is fixedly connected to the inner side of the sliding ring. The limiting block is slidably connected in the sliding groove. The sliding ring and the ceramic sleeve are connected by a spring. The rotating ring includes a rotating connection to the upper side of the sliding ring and a rotating ring sleeved on the lower end of the ceramic sleeve. An annular boss is fixedly connected to the inner side of the lower end of the rotating ring. The annular boss and the rotating ring are integrally formed. The annular boss abuts against the ceramic sleeve. The rotating ring is provided with an air hole, and a guide block is fixedly connected to the inner side of the upper end of the rotating ring. A first guide edge and a second guide edge are provided on the outer side of the lower end of the ceramic sleeve. The first guide edge is provided along the circumference of the ceramic sleeve. A guide groove is formed between the guide edge and the second guide edge. The first guide edge is located on the lower side of the second guide edge. The first guide edge includes several first inclined surfaces and several first stop surfaces. The first inclined surfaces and first stop surfaces are spaced apart and are connected end to end in a basically wavy shape. A first positioning groove with an opening facing the second guide edge is formed between the first inclined surfaces and the first stop surfaces. The second guide edge includes several second inclined surfaces and several second stop surfaces. The second inclined surfaces and second stop surfaces are spaced apart and are connected end to end in a basically wavy shape. A second positioning groove with an opening facing the first guide edge is formed between the second inclined surfaces and the second stop surfaces. The second positioning groove is located on the upper side of the first inclined surface and on the lower side of the second inclined surface. The guide block is located in the guide groove and cooperates with the second positioning groove.

[0008] The above setup allows for confirmation of whether the surge arrester has been struck by lightning, facilitating troubleshooting of the line. Specifically, when an overhead line is struck by lightning, the sliding seat moves downward along the fixed part under the pressure of the air inside the porcelain bushing. Specifically, the slip ring and the rotating ring move downward synchronously along the fixed part. The rotating ring and the slip ring can only rotate relative to each other and cannot disengage. The rotating ring and the fixed part are rotatably connected, meaning the rotating ring can rotate around the axis of the fixed part. Under the action of the limiting block and the sliding groove, the slip ring can only move up and down along the fixed part; there is no relative rotation between the slip ring and the fixed part. When the rotating ring moves downward along the fixed part, on the one hand, the annular boss disengages from the porcelain bushing, and the high-pressure gas inside the porcelain bushing leaves the porcelain bushing through the sliding groove and air hole. As the pressure decreases, the guide block and the second positioning groove disengage and move toward the first guide edge. Since the second positioning groove is located on the upper side of the first inclined surface, as the guide block moves downward, it will abut against the first inclined surface and reach the first positioning groove and abut against the first stop surface under the guidance of the first inclined surface. During the movement of the guide block along the first inclined surface, the rotating ring moves downward while rotating around the axis of the fixed part (assuming that the rotation direction of the rotating ring is the first direction at this time). When the guide block reaches the first positioning groove and abuts against the first stop surface, the slip ring and the limiting plate abut against each other to prevent the sliding seat from disengaging from the fixed part under the action of inertia. After a lightning strike, the pressure inside the porcelain bushing is low. Under the action of the spring, the sliding seat moves upward, the guide block disengages from the first positioning groove, and moves towards the second guide edge. When the second inclined surface is above the first positioning groove, the guide block will abut against the second inclined surface and, guided by the second inclined surface, reach the second positioning groove and abut against the second stop surface. At this time, the annular boss abuts against the lower end of the porcelain bushing again. During the movement of the guide block along the second inclined surface, the rotating ring moves upward while rotating around the axis of the fixed part (assuming that the rotation direction of the rotating ring is the second direction at this time). The second direction is consistent with the first direction. In summary, after the surge arrester undergoes one breakdown, the guide block moves from one of the second positioning grooves to the adjacent second positioning groove, and the rotating ring rotates by an angle. Whether the surge arrester has been broken through can be determined by whether the rotating ring rotates.

[0009] Furthermore, the outer side of the ceramic sleeve is provided with several scales, which are arranged sequentially along the circumference of the ceramic sleeve, and the scales correspond to the positions of the second positioning groove.

[0010] The above setup facilitates observation of how many times the surge arrester has been broken down. Specifically, the scale is set to zero, one, two, and three. An arrow is placed on the upper side of the rotating ring, pointing to the zero mark. After the surge arrester is broken down once, the guide block moves to the adjacent second positioning slot, and the rotating ring rotates by an angle, causing the arrow to point to the one mark, representing one break-down. When it is broken down again, the rotating ring continues to rotate, and the arrow points to the two marks, representing two break-downs, and so on. By observing the arrows, the number of times the surge arrester has been broken down can be determined.

[0011] Furthermore, the number of springs is at least three, and the springs are arranged in a circular array with the axis of the ceramic sleeve as the center.

[0012] Furthermore, the extension direction of the slide is parallel to the axis of the ceramic sleeve, the number of slides is at least three, and the slides are arranged in a circular array with the axis of the ceramic sleeve as the center. The number of limiting blocks is three, and they correspond one-to-one with the slides. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment.

[0014] Figure 2 This is a schematic diagram showing the concealed sliding seat and grounding electrode in an embodiment.

[0015] Figure 3 This is a partial perspective view of an embodiment.

[0016] Figure 4 This is a schematic diagram of the sliding block moving downwards.

[0017] Figure 5 for Figure 3 A schematic diagram of the sliding block moving downwards. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] See Figures 1 to 5 A stable distribution surge arrester includes a porcelain bushing 11. A high-voltage electrode 12 is fixedly connected to the upper end of the porcelain bushing 11, and a grounding electrode 13 is fixedly connected to the lower end of the porcelain bushing 11. The lower end of the high-voltage electrode 12 extends into the porcelain bushing 11 and forms a release part 121. The grounding electrode 13 includes a fixing part 131 and a receiving part 132. The upper end of the fixing part 131 is fixedly connected inside the porcelain bushing 11, and the receiving part 132 is disposed inside the porcelain bushing 11. A gap is formed between the receiving part 132 and the release part 121. A sliding seat 14 is sleeved on the lower end of the fixing part 131. The sliding seat 14 and the fixing part 131 are slidably connected. The sliding seat 14 and the porcelain bushing 11 are connected by a spring 15, and the sliding seat 14 and the lower end of the porcelain bushing 11 abut against each other.

[0020] With the above configuration, the porcelain bushing 11 is less likely to break after being struck by lightning. Specifically, the high-voltage electrode 12 is connected to the overhead line, the grounding electrode 13 is grounded, and a gap is formed between the release part 121 and the receiving part 132. During normal operation of the overhead line, the current of the overhead line will not flow to the ground. After the overhead line is struck by lightning, the voltage of the overhead line increases, the voltage of the high-voltage electrode 12 increases, and it breaks down the gap. At this time, the current on the high-voltage electrode 12 flows through the gap and the grounding electrode 13 to the ground, thereby reducing the voltage on the high-voltage electrode 12 and the overhead line.

[0021] The sliding seat 14 and the fixing part 131 are sealed together, and the upper side of the sliding seat 14 abuts against the lower end of the porcelain sleeve 11. Thus, the sliding seat 14 and the grounding electrode 13 seal the lower end of the porcelain sleeve 11, and the high-voltage electrode 12 seals the upper end of the porcelain sleeve 11. At this time, a basically sealed space is formed inside the porcelain sleeve 11. When the gap is broken, the air pressure inside the porcelain sleeve 11 rises, and the sliding seat 14 slides downward along the fixing part 131 and disengages from the porcelain sleeve 11. (See also...) Figure 4 When the spring 15 extends, the high-pressure gas inside the porcelain sleeve 11 exits between the sliding seat 14 and the porcelain sleeve 11, and the air pressure inside the porcelain sleeve 11 is reduced, thereby preventing the porcelain sleeve 11 from breaking. After the lightning strike, under the action of the spring 15, the sliding seat 14 slides upward along the fixed part 131 and re-abuts against the lower end of the porcelain sleeve 11.

[0022] In one implementation, the fixing part 131 is provided with a sliding groove 1311, the upper end of which extends through to the upper side of the fixing part 131. A limiting plate 1312 is provided at the lower end of the sliding groove 1311. The limiting plate 1312 is fixedly connected to the fixing part 131. The sliding seat 14 includes a sliding ring 141 and a rotating ring 142. The sliding ring 141 is sleeved on the fixing part 131 and slidably connected to it. A limiting block 143 adapted to the sliding groove 131 is fixedly connected to the inner side of the sliding ring 141. The limiting block 143 is slidably connected within the sliding groove 1311. A spring-loaded connection is established between the sliding ring 141 and the ceramic sleeve 11. A spring 15 is connected to the rotating ring 142, which is rotatably connected to the upper side of the slip ring 141. The rotating ring 142 is fitted onto the lower end of the ceramic sleeve 11. An annular boss 144 is fixedly connected to the inner side of the lower end of the rotating ring 142. The annular boss 144 and the rotating ring 142 are integrally formed. The annular boss 144 abuts against the ceramic sleeve 11. The rotating ring 142 is provided with an air hole 1421. A guide block 1422 is fixedly connected to the inner side of the upper end of the rotating ring 142. A first guide edge 111 and a second guide edge 112 are provided on the outer side of the lower end of the ceramic sleeve 11. The first guide edge 111 is arranged along the circumference of the ceramic sleeve 11. A guide groove 113 is formed between a guide edge 111 and a second guide edge 112. The first guide edge 111 is located below the second guide edge 112. The first guide edge 111 includes a plurality of first inclined surfaces 1111 and a plurality of first stop surfaces 1112. The first inclined surfaces 1111 and the first stop surfaces 1112 are spaced apart and are connected end to end, forming a generally wavy shape. A first positioning groove 1113 with an opening facing the second guide edge 112 is formed between the first inclined surfaces 1111 and the first stop surfaces 1112. The second guide edge 112 includes a plurality of second... The inclined surface 1121 and several second stop surfaces 1122 are provided at intervals. The second inclined surface 1121 and the second stop surfaces 1122 are connected end to end and are basically wavy. A second positioning groove 1123 with an opening facing the first guide edge 111 is formed between the second inclined surface 1121 and the second stop surfaces 1122. The second positioning groove 1123 is located on the upper side of the first inclined surface 1111, and the first positioning groove 1113 is located on the lower side of the second inclined surface 1121. The guide block 1422 is located in the guide groove 113 and cooperates with the second positioning groove 1123.

[0023] The above settings allow for confirmation of whether the surge arrester has been struck by lightning, facilitating troubleshooting of the line. Specifically, when an overhead line is struck by lightning, the sliding seat 14 moves downward along the fixed part 131 under the pressure of the air inside the porcelain sleeve 11. Specifically, the slip ring 141 and the rotating ring 142 move downward synchronously along the fixed part 131. The rotating ring 142 and the slip ring 141 can only rotate relative to each other; they cannot disengage. The rotating ring 142 is rotatably connected to the fixed part 131, meaning the rotating ring 142 can rotate around the axis of the fixed part 131. Under the action of the limiting block 143 and the sliding groove 1311, the slip ring 141 can only move up and down along the fixed part 131; the slip ring 141 and the fixed part 131 will not rotate relative to each other. See [link to relevant documentation]. Figure 5 When the rotating ring 142 moves downward along the fixed part 131, on the one hand, the annular boss 144 and the porcelain sleeve 11 disengage, and the high-pressure gas inside the porcelain sleeve 11 leaves the porcelain sleeve 11 through the sliding groove 1311 and the air hole 1421, causing the pressure inside the porcelain sleeve 11 to drop. On the other hand, the guide block 1422 and the second positioning groove 1123 disengage and move towards the first guide edge 111. Since the second positioning groove 1123 is located on the upper side of the first inclined surface 1111, as the guide block 1422 moves downward, the guide block 1422 will abut against the first inclined surface 1111 and... Guided by the inclined plane 1111, the guide block 1422 reaches the first positioning groove 1113 and abuts against the first stop surface 1112. During the movement of the guide block 1422 along the first inclined plane 1111, the rotating ring 142 moves downward while rotating around the axis of the fixed part 131 (assuming that the rotation direction of the rotating ring 142 is the first direction at this time). When the guide block 1422 reaches the first positioning groove 1113 and abuts against the first stop surface 1112, the sliding ring 141 abuts against the limiting plate 1312 to prevent the sliding seat 14 from disengaging from the fixed part 131 under the action of inertia. After a lightning strike, the pressure inside the porcelain sleeve 11 is low. Under the action of the spring 15, the sliding seat 14 moves upward, the guide block 1422 disengages from the first positioning groove 1113 and moves towards the second guide edge 112. When the second inclined surface 1121 is above the first positioning groove 1113, the guide block 1422 abuts against the second inclined surface 1121 and, guided by the second inclined surface 1121, reaches the second positioning groove 1123 and abuts against the second stop surface 1122. At this time, the annular boss 144 abuts against the lower end of the porcelain sleeve 11 again. See [link to relevant documentation]. Figure 3 During the movement of the guide block 1422 along the second inclined plane 1121, the rotating ring 142 moves upward while rotating around the axis of the fixed part 131 (assuming that the rotation direction of the rotating ring 142 is the second direction at this time), and the second direction is consistent with the first direction. In summary, after the surge arrester is broken down once, the guide block 1422 moves from one of the second positioning slots 1123 to the adjacent second positioning slot 1123, and the rotating ring 142 rotates by an angle. Whether the surge arrester has been broken down can be determined by whether the rotating ring 142 rotates.

[0024] As one implementation method, the outer side of the ceramic sleeve 11 is provided with several scales 114, which are arranged sequentially along the circumference of the ceramic sleeve 11, and the scales 114 correspond to the positions of the second positioning groove 1123.

[0025] The above settings facilitate observation of how many times the surge arrester has been broken through. Specifically, the scale 114 is set as zero scale 114, one scale 114, two scales 114, and three scales 114. An arrow is set on the upper side of the rotating ring 142, pointing to the zero scale 114. After the surge arrester is broken through once, the guide block 1422 moves to the adjacent second positioning groove 1123, and the rotating ring 142 rotates by an angle, so that the arrow points to the one scale 114, representing one break-through. When it is broken through again, the rotating ring 142 continues to rotate, and the arrow points to the two scales 114, representing two break-throughs, and so on. By observing the arrow, the number of times the surge arrester has been broken through can be determined.

[0026] In one implementation, the number of springs 15 is at least three, and the springs 15 are arranged in a circular array with the axis of the ceramic sleeve 11 as the center.

[0027] In one implementation, the extension direction of the slide groove 1311 is parallel to the axis of the ceramic sleeve 11. The number of slide grooves 1311 is at least three, and the slide grooves 1311 are arranged in a circular array with the axis of the ceramic sleeve 11 as the center. The number of limiting blocks 143 is three, and they correspond one-to-one with the slide grooves 1311.

[0028] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A stable distribution surge arrester, comprising a porcelain bushing, a high-voltage electrode fixedly connected to the upper end of the porcelain bushing, and a grounding electrode fixedly connected to the lower end of the porcelain bushing. The lower end of the high-voltage electrode extends into the porcelain bushing and forms a release portion. The grounding electrode includes a fixing portion and a receiving portion. The upper end of the fixing portion is fixedly connected inside the porcelain bushing. The receiving portion is disposed inside the porcelain bushing, and a gap is formed between the receiving portion and the release portion. A sliding seat is fitted onto the lower end of the fixing portion. The sliding seat and the fixing portion are slidably connected. The sliding seat and the porcelain bushing are connected by a spring, and the sliding seat abuts against the lower end of the porcelain bushing. The surge arrester is characterized in that... The fixing part is provided with a sliding groove, the upper end of which extends through to the upper side of the fixing part. A limiting plate is provided at the lower end of the sliding groove, and the limiting plate is fixedly connected to the fixing part. The sliding seat includes a sliding ring and a rotating ring. The sliding ring is fitted onto the fixing part and slidably connected to it. A limiting block adapted to the sliding groove is fixedly connected to the inner side of the sliding ring, and the limiting block is slidably connected within the sliding groove. The sliding ring and the ceramic sleeve are connected by a spring. The rotating ring includes a rotating connection to the upper side of the sliding ring, and is fitted onto the lower end of the ceramic sleeve. An annular boss is fixedly connected to the inner side of the lower end of the rotating ring. The annular boss and the rotating ring are integrally formed, and the annular boss abuts against the ceramic sleeve. The rotating ring is provided with air holes, and a guide block is fixedly connected to the inner side of the upper end of the rotating ring. A first guide edge is provided on the outer side of the lower end of the ceramic sleeve. The first guide edge is arranged along the circumference of the ceramic sleeve, and a guide groove is formed between the first guide edge and the second guide edge. The first guide edge is disposed on the lower side of the second guide edge. The first guide edge includes a plurality of first inclined surfaces and a plurality of first stop surfaces. The first inclined surfaces and the first stop surfaces are spaced apart, and a first positioning groove with an opening facing the second guide edge is formed between the first inclined surfaces and the first stop surfaces. The second guide edge includes a plurality of second inclined surfaces and a plurality of second stop surfaces. The second inclined surfaces and the second stop surfaces are spaced apart, and a second positioning groove with an opening facing the first guide edge is formed between the second inclined surfaces and the second stop surfaces. The second positioning groove is disposed on the upper side of the first inclined surface, and the first positioning groove is disposed on the lower side of the second inclined surface. The guide block is disposed in the guide groove and cooperates with the second positioning groove.

2. The stable distribution surge arrester according to claim 1, characterized in that, The outer side of the ceramic sleeve is provided with several scales, which are arranged sequentially along the circumference of the ceramic sleeve, and the scales correspond to the positions of the second positioning groove.

3. A stable distribution surge arrester according to claim 1, characterized in that, The number of springs is at least three, and the springs are arranged in a circular array with the axis of the ceramic sleeve as the center.

4. A stable distribution surge arrester according to claim 1, characterized in that, The extension direction of the slide is parallel to the axis of the ceramic sleeve. There are at least three slides, and the slides are arranged in a circular array with the axis of the ceramic sleeve as the center. There are three limiting blocks, and they correspond one-to-one with the slides.

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