A disconnector for a lightning arrester

Abstract

The present invention discloses a disconnector for a lightning arrester, which comprises a base and a housing. A first spacer and a second spacer are arranged inside the base. The first spacer includes a discharge sheet and a connecting sheet which are in electrical contact with each other. A discharge gap is formed between the discharge sheet and the first spacer. The connecting sheet is electrically connected to the second spacer through a resistance sheet. A first adjusting member and a second adjusting member are also movably arranged inside the housing. The first adjusting member is fixedly connected to the discharge sheet. After the first adjusting member moves, it drives the discharge sheet to move away from or close to the second spacer so as to change the length of the discharge gap. The second adjusting member abuts against the inner side of the connecting sheet. After the second adjusting member moves outward, the connecting sheet is abutted by the second adjusting member and is in electrical contact with the discharge sheet. The beneficial effect of the present invention is that the disconnector can be adapted to power systems with different voltage magnitudes by adjusting the discharge gap, which is relatively convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightning arresters, and more 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, and 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 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 for electrically connecting the two is provided between the first gap piece and the second gap piece. The second gap piece is in contact with the explosive body. An electrical connection block electrically connected to the first gap piece is provided inside the housing. The first gap piece further includes a discharge piece and a connection piece in electrical contact with each other. 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 electrical connection block. A first adjusting member and a second adjusting member are movably provided 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 presses 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 adjusting 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 effect is that: 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 three-dimensional structural schematic diagram of the disconnector in the present invention;

[0016] Figure 2 is an internal structural schematic diagram of the disconnector in the present invention;

[0017] Figure 3 is a three-dimensional structural schematic diagram of the base in the present invention;

[0018] Figure 4 is a three-dimensional structural schematic diagram of the housing in the present invention;

[0019] Figure 5 is a partial structural schematic diagram of the disconnector in the present invention Figure 1 ;

[0020] Figure 6 is a partial structural schematic diagram of the disconnector in the present invention Figure 2 ;

[0021] Figure 7 is a split structural schematic diagram of the first adjusting member and the second adjusting member in the present invention;

[0022] Figure 8 is a three-dimensional structural schematic diagram of the adjusting column in the present invention.

[0023] The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0024] 1. Base; 2. Housing; 3. Power connection block; 4. Mounting base; 5. Discharge piece; 6. First adjustment groove; 7. Second adjustment groove; 8. Support plate; 9. Support groove; 11. Grounding post; 12. Mounting hole; 13. Explosion body; 31. Power connection hole; 32. Jack; 41. Mounting groove; 42. First spacer; 43. Second spacer; 44. Resistance piece; 51. Connecting piece; 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. Adjusting column; 82. Adjusting head; 83. Cross slot; 84. Ring groove. Detailed implementation manner

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] 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.

[0027] 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 have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here.

[0028] 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 devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0029] 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.

[0030] Such as Figures 1 - 4As 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 inside the housing 2. A grounding post 11 is provided outside the base 1, and a power connection hole 31 is provided on the grounding block. Inside the base 1, there are a first spacer 42, a second spacer 43, and an explosive body 13. A resistor sheet 44 that electrically connects the two from both side parts 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.

[0031] As Figures 5 - 6 shown, in this embodiment, the first spacer 42 includes a discharge sheet 5 and a connection sheet 51. The discharge sheet 5 is generally V-shaped. A discharge gap is formed between the V-shaped tip part of the discharge sheet 5 and the first spacer 42. There are two connection sheets 51, and one side of each is electrically connected to both sides of the second spacer 43 through a resistor sheet 44 and is simultaneously in electrical contact with the power connection block 3. The other side of the connection sheet 51 extends obliquely towards the inside of the housing 2 and is in electrical contact with the discharge sheet 5 from the inside of the discharge sheet 5. Inside 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 sheet 5, and the second adjusting member 71 abuts against the inside of the connection sheet 51.

[0032] 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, and at the same time, a voltage difference will be 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 electric arc will be formed between the discharge sheet 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.

[0033] When the shell 2 is not installed on the base 1, the first adjusting member 61 and the second adjusting member 71 are directly exposed to the outside. As needed, the technician can horizontally move the first adjusting member 61 and the second adjusting member 71. After the first adjusting member 61 moves horizontally toward the inside of the base 1, it will drive the discharge sheet 5 to move toward the inside of the base 1, and contact the two connecting sheets 51 to expand outward, and the discharge gap between the discharge sheet 5 and the second gap sheet 43 will be shortened; similarly, after the first adjusting member 61 moves horizontally toward the outside of the base 1, it will drive the discharge sheet 5 to move toward the outside of the base 1, and the discharge gap will be extended. At this time, if the connecting sheet 51 does not undergo irreversible deformation, it will reset and make electrical contact with the discharge sheet 5; the moving direction of the second adjusting member 71 is always kept consistent with that of the first adjusting member 61. After the second adjusting member 71 moves, it contacts one side of the connecting sheet 51 from the inside, causing the connecting sheet 51 to shrink, and makes electrical contact with the discharge sheet 5 from the inside. After the discharge gap is adjusted, the shell 2 can be fixedly installed on the base 1. Technicians can adjust the discharge gap in the disconnector to an appropriate length based on the actual voltage of the power system to which the arrester is connected.

[0034] Specifically, a mounting seat 4 is provided in the shell 2, and a mounting groove 41 is provided in the mounting seat 4 for accommodating a first gap piece 42, a second gap piece 43, and an explosive body 13. A mounting hole 12 for accommodating the explosive body 13 and elastically connected thereto is provided on the inner side of the mounting groove 41. A first adjustment groove 6 and a second adjustment groove 7 are respectively provided on both sides 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 piece 5. 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 piece 5.

[0035] Furthermore, 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, a threaded hole is provided on the support plate 8, 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, and respective adjustment columns 81 are provided on the first adjustment member 61 and the second adjustment member 71, the adjustment column 81 is movably connected to the two adjustment members in the circumferential direction and transmission connected in the axial direction, the adjustment column 81 is threaded in the threaded hole, a socket 32 ​​is provided on the power connection block 3 for inserting the other end of the adjustment column 81, and a cross groove 83 is provided on the end face of the inner end of the adjustment column 81 inserted into the socket 32.

[0036] After the adjusting column 81 rotates on the supporting plate 8, it will not drive the adjusting member to rotate. However, as the adjusting column 81 rotates, the first adjusting member 61 or the second adjusting member 71 will move horizontally in the first adjusting groove 6 or the second adjusting groove 7, thereby driving the discharge plate 5 or the connecting member to move.

[0037] As Figure 7 shown, in this embodiment, the first adjusting member 61 includes a first adjusting block 62 and a second adjusting block 63 fixedly connected to each other. A mating groove 64 is provided on the first adjusting block 62, and one end of the discharge piece 5 is provided with a mating head 52 fixedly inserted into the mating groove 64. The first adjusting member 61 includes a first adjusting block 62 and a second adjusting block 63 fixedly connected to each other. A driving arm 74 is provided on the third adjusting block 72, and one end of the connecting piece 51 is provided with a driven head 53 that is abutted against from the inside by the driving arm 74. Specifically, a plurality of connecting holes 65 are provided on the first adjusting block 62 and the third adjusting block 72, and a plurality of connecting columns 66 are provided on the second adjusting block 63 and the fourth adjusting block 73. The connecting columns 66 are inserted into the connecting holes 65 in a matching manner to fixedly connect the first adjusting block 62 and the second adjusting block 63, and the third adjusting block 72 and the fourth adjusting block 73 respectively.

[0038] As Figure 8 shown, further, one end of the adjusting column 81 is provided with an adjusting head 82, and an annular groove 84 is further provided on the adjusting head 82. 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 structure between the first adjusting block 62 and the second adjusting block 63 forms an adjusting hole 67 that is movably matched with the adjusting head 82. Similarly, the groove-like structure between the third adjusting block 72 and the fourth adjusting block 73 also forms 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.

[0039] 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 can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by 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 housing (2) mounted on the base (1). Inside the base (1), there are a first spacer (42), a second spacer (43), and an explosive body (13). A resistor disc (44) electrically connecting the first spacer (42) and the second spacer (43) is provided between the first spacer (42) and the second spacer (43). The second spacer (43) is in contact with the explosive body (13). A power connection block (3) electrically connected to the first spacer (42) is provided inside the housing (2), and it is characterized in that: The first spacer (42) further includes a discharge piece (5) and a connecting piece (51) in electrical contact with each other. The discharge piece (5) is V-shaped, and a discharge gap is formed between the discharge piece (5) and the first spacer (42). There are two connecting pieces (51). One side of each connecting piece (51) is electrically connected to the resistance piece (44) and the power connection block (3), and the other side is in electrical contact with the discharge piece (5) from the inside of the discharge piece (5). A first adjusting member (61) and a second adjusting member (71) are movably provided in the housing (2). The first adjusting member (61) is fixedly connected to the discharge piece (5). After the first adjusting member (61) moves, it drives the discharge piece (5) to move away from or close to the second spacer (43) to change the length of the discharge gap. The second adjusting member (71) abuts against the inside of the connecting piece (51). After the second adjusting member (71) moves outward, the connecting piece (51) is abutted by the second adjusting member (71) and is in electrical contact with the discharge piece (5).

2. The separator according to claim 1, characterized in that: An installation seat (4) is provided in the housing (2). An installation groove (41) for accommodating the first spacer (42), the second spacer (43), and the explosive body (13) is provided in the installation seat (4). An installation hole (12) for accommodating the explosive body (13) is provided inside the installation groove (41). A first adjusting groove (6) and a second adjusting groove (7) are further provided on the side of the installation groove (41). The first adjusting member (61) is movably provided in the first adjusting groove (6) and is fixedly connected to one end of the discharge piece (5). The second adjusting member (71) is movably provided in the second adjusting groove (7) and abuts against the inside of one end of the discharge piece (5).

3. The separator according to claim 2, wherein: Support grooves (9) are provided at the top openings of the first adjusting groove (6) and the second adjusting groove (7). A support plate (8) is installed in the support grooves (9). Threaded holes are provided on the support plate (8). Adjusting columns (81) which are circumferentially movably connected to and axially drivingly connected to the first adjusting member (61) and the second adjusting member (71) are provided on the first adjusting member (61) and the second adjusting member (71). The adjusting columns (81) are threadedly connected to the threaded holes. After the adjusting columns (81) rotate on the support plate (8), they drive the first adjusting member (61) or the second adjusting member (71) to move in the first adjusting groove (6) or the second adjusting groove (7).

4. The separator according to claim 3, wherein: The first adjusting member (61) includes a first adjusting block (62) and a second adjusting block (63) fixedly connected to each other. A mating groove (64) is provided on the first adjusting block (62). A mating head (52) fixedly inserted into the mating groove (64) is provided at one end of the discharge piece (5).

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

6. The separator according to claim 5, characterized in that: One end of the adjusting column (81) is provided with an adjusting head (82), and an annular groove (84) is further provided on the adjusting head (82). An adjusting hole (67) that is 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). An annular block (68) that is movably matched with the annular groove (84) is further provided in the adjusting hole (67).

7. The separator according to claim 5, characterized in that: A plurality of connecting holes (65) are provided on the first adjusting block (62) and the third adjusting block (72), and a plurality of connecting columns (66) are provided on the second adjusting block (63) and the fourth adjusting block (73). The connecting columns (66) are inserted into the connecting holes (65) in a matching manner to fixedly connect the first adjusting block (62) and the second adjusting block (63) and the third adjusting block (72) and the fourth adjusting block (73).

8. The disengager according to claim 7, wherein: The power connection block (3) is pressed above the support plate (8) to prevent the support plate (8) from disengaging from the support groove (9). A jack (32) is provided on the power connection block (3). The other end of the adjusting column (81) is inserted into the jack (32), and a cross groove (83) is provided on its end face.

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