Disconnector for lightning arrester

Abstract

The disconnector for the lightning arrester comprises a base and a shell, a first gap piece and a second gap piece are arranged in the base, the first gap piece comprises a discharging piece and a connecting piece which are in electric contact, and a discharging gap is formed between the discharging piece and the first gap piece; the connecting piece is electrically connected with the second gap piece through the resistor piece, a first adjusting piece and a second adjusting piece are further movably arranged in the shell, the first adjusting piece is fixedly connected with the discharging piece, and after the first adjusting piece moves, the discharging piece is driven to be away from or close to the second gap piece so as to change the length of the discharging gap. The second adjusting piece abuts against the inner side of the connecting piece, and after the second adjusting piece moves towards the outer side, the connecting piece abuts against the second adjusting piece and makes electric contact with the discharging piece. The disconnector has the beneficial effects that the disconnector can be adapted to power systems with different voltages by adjusting the discharge gap, and the disconnector is relatively convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightning arresters, and specifically relates to a disconnector for a lightning arrester. Background Art

[0002] The disconnector of a lightning arrester is a safety device used to monitor the operating state of the lightning arrester and provide a fault isolation function. After the lightning arrester fails due to overvoltage or aging, etc., it can automatically disconnect the lightning arrester from the power supply system, thereby protecting the safe and stable operation of the power system.

[0003] There is a discharge gap inside the disconnector. The design of this discharge gap is based on the characteristics of dielectric breakdown. When the lightning arrester is working normally, the voltage across the discharge gap is relatively low, the discharge gap will not be broken down, and it will not affect the circuit. When a fault occurs in the lightning arrester, an abnormal current will be generated, causing the voltage across the discharge gap to rise. When the voltage reaches a certain threshold, the discharge gap is broken down and an arc is generated. Then, an explosive body located inside the disconnector will be detonated, thereby disconnecting the lightning arrester from the circuit.

[0004] In the actual application process, when the discharge gap is short, the voltage required for its breakdown is relatively low. At this time, a relatively small abnormal current generated by the lightning arrester will detonate the explosive body, which is suitable for a lower voltage system. When the discharge gap is long, the voltage required for its breakdown is relatively high. At this time, a relatively large abnormal current generated by the lightning arrester will detonate the explosive body, which is suitable for a higher voltage system. However, for the existing disconnectors, the discharge gap inside them is preset and cannot be adjusted accordingly according to the actual application scenario, which is rather inconvenient. Summary of the Invention

[0005] Aiming at the problem that the internal discharge gap of the existing disconnector for a lightning arrester cannot be adjusted and is not convenient for application in different power systems, the following invention is proposed: A disconnector for a lightning arrester, including a base and a housing installed on the base. The base internally is provided with a first gap piece, a second gap piece, and an explosive body. A resistor piece electrically connecting the two is arranged between the first gap piece and the second gap piece. The second gap piece is in contact with the explosive body. An electricity connection block electrically connected to the first gap piece is arranged inside the housing. The first gap piece further includes a discharge piece and a connection piece in electrical contact. A discharge gap is formed between the discharge piece and the first gap piece. The connection piece is located inside the discharge piece and is simultaneously electrically connected to the resistor piece and the electricity connection block. A first adjusting member and a second adjusting member are movably arranged inside the housing. The first adjusting member is fixedly connected to the discharge piece, and the second adjusting member abuts against the inner side of the connection piece.

[0006] By moving the first adjusting member, the discharge sheet can be driven away from or close to the second gap sheet to change the length of the discharge gap. After the second adjusting member moves outward, the connecting sheet is resisted by the second adjusting member and electrically contacts the discharge sheet to ensure that the first gap sheet can be normally powered.

[0007] Furthermore, a mounting seat is provided in the shell, and a mounting groove for accommodating the first gap piece, the second gap piece, and the explosive body is provided in the mounting seat, and a mounting hole for accommodating the explosive body is provided on the inner side of the mounting groove. A first adjustment groove and a second adjustment groove are also provided on the side of the mounting groove. The first adjustment member is movably provided in the first adjustment groove and fixedly connected to one end of the discharge piece, and the second adjustment member is movably provided in the second adjustment groove and abuts against the inner side of one end of the discharge piece.

[0008] Furthermore, the top openings of the first adjustment groove and the second adjustment groove are both provided with support grooves, and a support plate is installed in the support groove, and a threaded hole is provided on the support plate. The first adjustment member and the second adjustment member are both provided with adjustment columns which are movably connected to the two members in the circumferential direction and transmission connected to the two members in the axial direction, and the adjustment columns are threadedly connected to the threaded holes. After the adjustment columns are rotated on the support plate, they drive the first adjustment member or the second adjustment member to move in the first adjustment groove or the second adjustment groove.

[0009] Furthermore, the first adjusting member includes a first adjusting block and a second adjusting block fixedly connected to each other, a matching groove is provided on the first adjusting block, and a matching head fixedly inserted into the matching groove is provided at one end of the discharge piece. After the first adjusting member moves in the first adjusting groove, the discharge piece is driven to move through the matching head.

[0010] Furthermore, the first adjusting member includes a first adjusting block and a second adjusting block fixedly connected to each other, a driving arm is provided on the third adjusting block, and a driven head is provided at one end of the connecting piece which is abutted from the inside by the driven arm. After the second adjusting member moves in the first adjusting groove, the connecting piece is driven to move partially by the driving arm.

[0011] Furthermore, an adjusting head is provided at one end of the adjusting column, and an annular groove is also provided on the adjusting head. An adjusting hole that is movably matched with the adjusting head is provided between the first adjusting block and the second adjusting block and between the third adjusting block and the fourth adjusting block, and an annular block that is movably matched with the annular groove is also provided in the adjusting hole.

[0012] Furthermore, the first adjustment block and the third adjustment block are provided with a plurality of connection holes, and the second adjustment block and the fourth adjustment block are provided with a plurality of connection columns, and the connection columns are inserted into the connection holes to fix the first adjustment block and the second adjustment block and the third adjustment block and the fourth adjustment block.

[0013] Further, the power connection block is pressed against the upper part of the support plate to prevent the support plate from disengaging from the support groove. The power connection block is provided with a jack, and the other end of the adjustment column is inserted into the jack, and a cross groove is provided on its end face.

[0014] The present invention provides a disconnector for a lightning arrester, and its beneficial effects are as follows: By moving the first adjusting member and the second adjusting member, the discharge sheet and the connecting sheet can be moved. After the discharge sheet is moved, the length of the discharge gap between it and the second gap sheet is changed, and finally the breakdown voltage of the disconnector is changed, so that the disconnector can be adapted to power systems with different voltages as needed, which is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective structural view of the disconnector in the present invention; Figure 2 is an internal structural view of the disconnector in the present invention; Figure 3 is a perspective structural view of the base in the present invention; Figure 4 is a perspective structural view of the housing in the present invention; Figure 5 is a schematic view of a partial structure of the disconnector in the present invention Figure 1 ; Figure 6 is a schematic view of a partial structure of the disconnector in the present invention Figure 2 ; Figure 7 is a schematic exploded view of the first adjusting member and the second adjusting member in the present invention; Figure 8 is a perspective structural view of the adjustment column in the present invention.

[0016] The corresponding relationship between the reference numerals and the component names in the drawings is as follows: 1. Base; 2. Housing; 3. Power connection block; 4. Mounting seat; 5. Discharge sheet; 6. First adjustment groove; 7. Second adjustment groove; 8. Support plate; 9. Support groove; 11. Grounding column; 12. Mounting hole; 13. Explosion body; 31. Power connection hole; 32. Jack; 41. Mounting groove; 42. First gap sheet; 43. Second gap sheet; 44. Resistance sheet; 51. Connecting sheet; 52. Fitting head; 53. Driven head; 61. First adjusting member; 62. First adjusting block; 63. Second adjusting block; 64. Fitting groove; 65. Connecting hole; 66. Connecting column; 67. Adjusting hole; 68. Ring block; 71. Second adjusting member; 72. Third adjusting block; 73. Fourth adjusting block; 74. Driving arm; 81. Adjustment column; 82. Adjusting head; 83. Cross groove; 84. Ring groove. DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0018] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0019] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described herein.

[0020] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation.

[0021] In addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0022] As Figures 1 - 4 shown, it is a preferred embodiment of the present invention, a disconnector for a lightning arrester, including a base 1, a housing 2, and a power connection block 3. The housing 2 is fixedly installed on the base 1, and the power connection block 3 is fixedly installed in the housing 2. A grounding post 11 is provided outside the base 1, a power connection hole 31 is provided on the grounding block, a first spacer 42, a second spacer 43, and an explosive body 13 are provided inside the base 1. A resistor sheet 44 that electrically connects the two from both side portions is provided between the first spacer 42 and the second spacer 43. The first spacer 42 is in electrical contact with the power connection block 3, the second spacer 43 is in contact with the explosive body 13, and the explosive body 13 is elastically connected to the base 1 through a spring.

[0023] As Figures 5 - 6As shown, in this embodiment, the first spacer 42 includes a discharge piece 5 and connecting pieces 51. The discharge piece 5 is generally V-shaped as a whole. A discharge gap is formed between the V-shaped tip portion of the discharge piece 5 and the first spacer 42. There are two connecting pieces 51, and one side of each of them is electrically connected to both sides of the first spacer 42 through resistance pieces 44 and is electrically contacted with the power connection block 3 at the same time. The other side of the connecting piece 51 extends obliquely towards the inside of the housing 2 and is electrically contacted with the discharge piece 5 from the inside of the discharge piece 5. In the housing 2, a first adjusting member 61 and a second adjusting member 71 that move horizontally towards the inside of the housing 2 are also movably provided. The first adjusting member 61 is fixedly connected to the discharge piece 5, and the second adjusting member 71 abuts against the inside of the connecting piece 51.

[0024] During actual use, the lightning arrester needs to be electrically connected to the power connection hole 31 of the disconnector, and then the grounding post 11 is grounded to complete the installation of the disconnector. After the lightning arrester fails, an abnormal current will be output to the disconnector through the power connection hole 31. At the same time, a voltage difference is formed between the first spacer 42 and the second spacer 43. When the voltage difference exceeds a certain threshold, the discharge gap is broken down, and an arc is formed between the discharge piece 5 and the second spacer 43. At the same time, the explosive body 13 is detonated, and the disconnector explodes and disconnects the lightning arrester from the power system.

[0025] When the housing 2 is not installed on the base 1, at this time, the first adjusting member 61 and the second adjusting member 71 are directly exposed to the outside. According to needs, the technician can horizontally move the first adjusting member 61 and the second adjusting member 71. After the first adjusting member 61 moves horizontally towards the inside of the base 1, it will drive the discharge piece 5 to also move towards the inside of the base 1 and abut to expand the two connecting pieces 51 outwards. The discharge gap between the discharge piece 5 and the second spacer 43 is shortened accordingly; similarly, after the first adjusting member 61 moves horizontally towards the outside of the base 1, it will drive the discharge piece 5 to also move towards the outside of the base 1, and the discharge gap is lengthened accordingly. At this time, if the connecting piece 51 does not undergo irreversible deformation, it will reset and be electrically contacted with the discharge piece 5; the moving direction of the second adjusting member 71 always remains the same as that of the first adjusting member 61. After the second adjusting member 71 moves, it abuts against one side of the connecting piece 51 from the inside, causing the connecting piece 51 to contract and be electrically contacted with the discharge piece 5 from the inside. After the discharge gap is adjusted, the housing 2 can be fixedly installed on the base 1. The technician can adjust the discharge gap in the disconnector to an appropriate length according to the voltage magnitude of the power system to which the actual lightning arrester is connected.

[0026] Specifically, an installation seat 4 is provided inside the housing 2. An installation groove 41 for accommodating a first spacer 42, a second spacer 43, and an explosive body 13 is provided inside the installation seat 4. An installation hole 12 for accommodating the explosive body 13 and elastically connecting thereto is provided inside the inner side of the installation groove 41. A first adjustment groove 6 and a second adjustment groove 7 are respectively provided on both side portions of the installation groove 41. The first adjustment member 61 is movably disposed inside the first adjustment groove 6 and is fixedly connected to one end of the discharge piece 5. The second adjustment member 71 is movably disposed inside the second adjustment groove 7 and abuts against the inner side of one end of the discharge piece 5.

[0027] Further, support grooves 9 are provided at the top openings of the first adjustment groove 6 and the second adjustment groove 7. A support plate 8 is installed inside the support grooves 9. Threaded holes are provided on the support plate 8. The power connection block 3 presses against the upper side of the support plate 8 to prevent the support plate 8 from detaching from the support grooves 9. Adjusting columns 81 are respectively provided on the first adjustment member 61 and the second adjustment member 71. The adjusting columns 81 are circumferentially movably connected to the two adjustment members and are axially drivingly connected. The adjusting columns 81 are threadedly connected to the threaded holes. A jack 32 for the other end of the adjusting column 81 to be inserted is provided on the power connection block 3. A cross groove 83 is provided on the end face of the end portion where the adjusting column 81 is inserted into the jack 32.

[0028] After the adjusting column 81 rotates on the support plate 8, it will not drive the adjustment member to rotate. However, as the adjusting column 81 rotates, the first adjustment member 61 or the second adjustment member 71 will horizontally move inside the first adjustment groove 6 or the second adjustment groove 7, thereby driving the discharge piece 5 or the connecting member to move.

[0029] As Figure 7 shown, in this embodiment, the first adjustment member 61 includes a first adjustment block 62 and a second adjustment block 63 fixedly connected to each other. A fitting groove 64 is provided on the first adjustment block 62. One end of the discharge piece 5 is provided with a fitting head 52 fixedly inserted into the fitting groove 64; the first adjustment member 61 includes a first adjustment block 62 and a second adjustment block 63 fixedly connected to each other. A driving arm 74 is provided on the third adjustment block 72. One end of the connecting piece 51 is provided with a driven head 53 abutted against from the inner side by the driving arm 74. Specifically, a plurality of connecting holes 65 are provided on the first adjustment block 62 and the third adjustment block 72. A plurality of connecting columns 66 are provided on the second adjustment block 63 and the fourth adjustment block 73. The connecting columns 66 are fittingly inserted into the connecting holes 65 to respectively fixedly connect the first adjustment block 62 and the second adjustment block 63 as well as the third adjustment block 72 and the fourth adjustment block 73.

[0030] As Figure 8As shown in the figure, further, one end of the adjusting column 81 is provided with an adjusting head 82, and the adjusting head 82 is further provided with an annular groove 84. Groove-like structures are provided on the first adjusting block 62, the second adjusting block 63, the third adjusting block 72, and the fourth adjusting block 73. The groove-like structures between the first adjusting block 62 and the second adjusting block 63 form an adjusting hole 67 that is movably matched with the adjusting head 82. Similarly, the groove-like structures between the third adjusting block 72 and the fourth adjusting block 73 also form an adjusting hole 67 that is movably matched with the adjusting head 82. An annular block 68 that is movably matched with the annular groove 84 is further provided in the adjusting hole 67, so as to realize the circumferential movable connection and the axial transmission connection between the adjusting column 81 and the adjusting member.

[0031] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A disconnector for a lightning arrester, comprising a base (1) and a shell (2) mounted on the base (1), wherein a first gap sheet (42), a second gap sheet (43), and an explosive body (13) are provided inside the base (1), a resistor sheet (44) electrically connecting the first gap sheet (42) and the second gap sheet (43) is provided between the first gap sheet (42) and the second gap sheet (43), the second gap sheet (43) is in contact with the explosive body (13), and a power connection block (3) electrically connected to the first gap sheet (42) is provided inside the shell (2), characterized in that: The first gap sheet (42) further comprises a discharge sheet (5) and a connecting sheet (51) in electrical contact with each other, a discharge gap is formed between the discharge sheet (5) and the first gap sheet (42), the connecting sheet (51) is located on the inner side of the discharge sheet (5) and is electrically connected to the resistor sheet (44) and the power connection block (3) at the same time, and a first adjusting member (61) and a second adjusting member (71) are also movably provided in the housing (2), the first adjusting member (61) being fixedly connected to the discharge sheet (5), and when the first adjusting member (61) moves, the discharge sheet (5) is driven to move away from or closer to the second gap sheet (43) to change the length of the discharge gap, the second adjusting member (71) abuts against the inner side of the connecting sheet (51), and when the second adjusting member (71) moves toward the outside, the connecting sheet (51) is abutted by the second adjusting member (71) and is in electrical contact with the discharge sheet (5).

2. The disconnector according to claim 1, characterized in that: A mounting seat (4) is provided in the shell (2), and a mounting groove (41) for accommodating a first gap sheet (42), a second gap sheet (43), and an explosive body (13) is provided in the mounting seat (4), and a mounting hole (12) for accommodating the explosive body (13) is provided on the inner side of the mounting groove (41), and a first adjustment groove (6) and a second adjustment groove (7) are also provided on the side of the mounting groove (41), the first adjustment member (61) is movably provided in the first adjustment groove (6) and is fixedly connected to one end of the discharge sheet (5), and the second adjustment member (71) is movably provided in the second adjustment groove (7) and abuts against the inner side of one end of the discharge sheet (5).

3. The disconnector according to claim 2, characterized in that: A support groove (9) is provided at the top opening of the first adjustment groove (6) and the second adjustment groove (7), a support plate (8) is installed in the support groove (9), and a threaded hole is provided on the support plate (8). The first adjustment member (61) and the second adjustment member (71) are provided with an adjustment column (81) respectively connected to the first adjustment member (61) and the second adjustment member (71) in a circumferentially movable manner and in an axially transmission manner. The adjustment column (81) is threadedly connected to the threaded hole. After the adjustment column (81) rotates on the support plate (8), it drives the first adjustment member (61) or the second adjustment member (71) to move in the first adjustment groove (6) or the second adjustment groove (7).

4. The disconnector according to claim 3, characterized in that: The first adjusting member (61) comprises a first adjusting block (62) and a second adjusting block (63) which are fixedly connected to each other, a matching groove (64) is provided on the first adjusting block (62), and a matching head (52) is fixedly inserted into the matching groove (64) at one end of the discharge plate (5).

5. The disconnector according to claim 4, characterized in that: The first adjusting member (61) comprises a first adjusting block (62) and a second adjusting block (63) which are fixedly connected to each other; a driving arm (74) is provided on the third adjusting block (72); and a driven head (53) is provided at one end of the connecting piece (51) and is abutted from the inside by the driven arm (74).

6. The disconnector according to claim 5, characterized in that: An adjusting head (82) is provided at one end of the adjusting column (81), and an annular groove (84) is also provided on the adjusting head (82). An adjusting hole (67) movably matched with the adjusting head (82) is provided between the first adjusting block (62) and the second adjusting block (63) and between the third adjusting block (72) and the fourth adjusting block (73), and an annular block (68) movably matched with the annular groove (84) is also provided in the adjusting hole (67).

7. The disconnector according to claim 5, characterized in that: The first adjusting block (62) and the third adjusting block (72) are provided with a plurality of connecting holes (65), and the second adjusting block (63) and the fourth adjusting block (73) are provided with a plurality of connecting pillars (66), the connecting pillars (66) being inserted into the connecting holes (65) to fixedly connect the first adjusting block (62) and the second adjusting block (63) as well as the third adjusting block (72) and the fourth adjusting block (73).

8. The disconnector according to claim 7, characterized in that: The power connection block (3) is pressed against the upper part of the support plate (8) to prevent the support plate (8) from escaping from the support groove (9); a plug hole (32) is provided on the power connection block (3); the other end of the adjustment column (81) is inserted into the plug hole (32), and a cross groove (83) is provided on the end surface thereof.

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