Closed jet type isolation fuse

Abstract

The utility model provides a closed jet type isolation fuse which comprises an isolation switch and a closed jet type fuse, the isolation switch comprises two post insulators and a conducting rod, the conducting rod is rotatably installed on a first connecting plate of one post insulator, and the conducting rod is rotatably installed on a second connecting plate of the other post insulator. A limiting structure for limiting the conducting rod at different opening angles is arranged between the conducting rod and the first connecting plate, and comprises a first through hole and a second through hole which are arranged at an interval along the width direction of the conducting rod and through which a bolt can pass; the limiting part is arranged on the first connecting plate, and when the bolt is installed in the first through hole, the bolt abuts against the limiting part when the conducting rod is opened; when the bolt is installed in the second through hole, the bolt abuts against the limiting part when the conducting rod is opened. Therefore, the installation positions of the bolts can be correspondingly selected according to different installation positions, obvious fractures are achieved, judgment of maintainers is facilitated, and maintenance is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a closed jet-type isolating fuse. Background Art

[0002] The enclosed jet-type isolating fuse includes an isolating switch and an enclosed jet-type fuse, which solves the problem of the moving and static contacts of the drop-type fuse being exposed to the air and the problem of the enclosed jet-type fuse being difficult to maintain due to the lack of a visible breakpoint. At present, the opening angle of the conductive rod of the enclosed jet-type isolating fuse is fixed, but in actual operation, the required opening angle is different due to the different installation positions of the enclosed jet-type isolating fuse. Utility Model Content

[0003] To this end, the utility model provides a closed jet-type isolating fuse, comprising an isolating switch and a closed jet-type fuse, the isolating switch comprising two post insulators and a conductive rod, the conductive rod being rotatably mounted on a first connecting plate of one of the post insulators, and characterized in that a limiting structure for limiting the conductive rod to be at different opening angles is provided between the conductive rod and the first connecting plate, the limiting structure comprising: a first through hole and a second through hole, which are arranged at intervals along the width direction of the conductive rod and can be passed by a bolt; a limiting portion, which is arranged on the first connecting plate, wherein when the bolt is installed in the first through hole, the bolt abuts against the limiting portion when the conductive rod is opened; when the bolt is installed in the second through hole, the bolt abuts against the limiting portion when the conductive rod is opened.

[0004] The bolt includes a head and a screw portion, the conductive rod is formed with a groove suitable for installing the head, and the first through hole or the second through hole is arranged in the middle position of the bottom of the groove, and the conductive rod is also provided with a channel connecting the first through hole and the second through hole and only for the reciprocating movement of the screw portion.

[0005] The head is polygonal, and the shape of the groove is adapted to the polygonal head.

[0006] The enclosed ejection type fuse and the post insulator are both fixed on the same mounting bracket.

[0007] The mounting bracket is made of U-shaped channel steel.

[0008] The two post insulators are both made of ceramic insulating parts.

[0009] The technical solution of the utility model has the following advantages:

[0010] 1. The closed jet-type isolating fuse provided by the utility model has a limiting structure between the conductive rod and the first connecting plate to limit the conductive rod to different opening angles, and the limiting structure includes: a first through-hole and a second through-hole, which are arranged at intervals along the width direction of the conductive rod and can be used for bolts to pass through; a limiting portion, which is arranged on the first connecting plate, wherein when the bolt is installed in the first through-hole, the bolt abuts against the limiting portion when the conductive rod is opened; when the bolt is installed in the second through-hole, the bolt abuts against the limiting portion when the conductive rod is opened. In this way, the installation position of the bolt can be selected according to the different installation positions, so that there is an obvious fracture, which is conducive to the judgment of maintenance personnel and makes maintenance safer.

[0011] 2. The closed jet-type isolating fuse provided by the utility model has a bolt including a head and a screw portion, and the conductive rod is formed with a groove suitable for installing the head, and a first through-hole or a second through-hole provided at the middle position of the bottom of the groove. The conductive rod is also provided with a channel connecting the first through-hole and the second through-hole and only for the reciprocating movement of the screw portion. In actual use, the bolt is fixed with the nut after passing through the first through-hole, and if it needs to be installed in the second through-hole, it is necessary to remove the nut and pull out the bolt before installation. By providing the channel, it is only necessary to loosen the nut first, and after the head of the bolt moves out of the groove for a certain distance, the screw portion can move along the channel to the second through-hole, and then tighten the nut. This makes installation quick and convenient, greatly improving installation efficiency.

[0012] 3. The closed jet-type isolating fuse provided by the utility model has a polygonal head, and the shape of the groove is adapted to the polygonal head, so that it is not easy to loosen after installation and is firmly installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the enclosed jet-type isolating fuse of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0016] Figure 3 It is a structural schematic diagram of the conductive rod (bolt installed at the first through hole) in an open state;

[0017] Figure 4It is a structural schematic diagram of the conductive rod (bolt installed at the second through hole) in an open state;

[0018] Figure 5 This is a cross-sectional view of a bolt installed at the first through-hole of a conductive rod.

[0019] Explanation of the reference numerals: 1. isolating switch; 2. enclosed jet fuse; 3. support insulator; 4. conductive rod; 5. first connecting plate; 6. first through hole; 7. second through hole; 8. bolt; 9. limit portion; 10. nut; 11. head; 12. screw portion; 13. groove; 14. channel; 15. mounting bracket. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example

[0025] This embodiment provides a closed ejection type isolation fuse, such as Figure 1As shown, it includes a disconnect switch 1, a closed ejection type fuse 2 and a mounting bracket 15.

[0026] The isolating switch 1 comprises two post insulators 3 and a conducting rod 4. The conducting rod 4 is rotatably mounted on a first connecting plate 5 of one of the post insulators 3. A limiting structure for limiting the conducting rod 4 to be at different opening angles is provided between the conducting rod 4 and the first connecting plate 5. Figure 2 As shown, the limiting structure includes: a first through hole 6 and a second through hole 7, which are arranged at intervals along the width direction of the conductive rod 4 and can be used for the bolt 8 to pass through; a limiting portion 9, which is arranged on the first connecting plate 5, wherein when the bolt 8 is installed in the first through hole 6, as shown in FIG. Figure 3 As shown, the bolt 8 abuts against the limiting portion 9 when the conductive rod 4 is opened; when the bolt 8 is installed in the second through hole 7, as shown in FIG. Figure 4 As shown, the bolt 8 abuts against the limiting portion 9 when the conductive rod 4 is opened. Figure 2 and Figure 5 As shown, the bolt 8 includes a head 11 and a screw portion 12, the conductive rod 4 is formed with a groove 13 suitable for mounting the head 11, and the first through hole 6 or the second through hole 7 is provided at the middle position of the bottom of the groove 13, and the conductive rod 4 is also provided with a channel 14 connecting the first through hole 6 and the second through hole 7 and only for the reciprocating movement of the screw portion 12, that is, the width of the channel 14 is greater than the diameter of the screw portion 12 and smaller than the size of the head 11. The head 11 is a polygon, and the shape of the groove 13 is adapted to the polygonal head 11. It should be noted that the polygon can be a hexagon or an octagon. In actual use, the screw portion 12 of the bolt 8 passes through the first through-hole 6 and is fixed with the nut 10. If it needs to be installed in the second through-hole 7, it is necessary to remove the nut 10 and pull out the screw portion 12 before installation. By setting the channel 14, it is only necessary to loosen the nut 10 first. After the head 11 of the bolt 8 is moved out of the groove 13, the screw portion 12 can be moved along the channel 14 to the second through-hole 7, and then the head 11 of the bolt 8 is moved into the groove 13, and the nut 10 can be tightened. This makes installation quick and convenient, and greatly improves the installation efficiency.

[0027] The mounting bracket 15 is mounted with the enclosed ejection type fuse 2 and the post insulator 3. In this embodiment, the mounting bracket 15 is made of U-shaped channel steel, and the post insulator 3 is made of ceramic insulating parts.

[0028] The utility model provides a closed jet-type isolating fuse, and a limiting structure for limiting the conductive rod 4 to be at different opening angles is provided between the conductive rod 4 and the first connecting plate 5, and the limiting structure includes: a first through hole 6 and a second through hole 7, which are arranged at intervals along the width direction of the conductive rod 4 and can be used for the bolt 8 to pass through; a limiting portion 9, which is provided on the first connecting plate 5, wherein when the bolt 8 is installed in the first through hole 6, the bolt 8 abuts against the limiting portion 9 when the conductive rod 4 is opened; when the bolt 8 is installed in the second through hole 7, the bolt 8 abuts against the limiting portion 9 when the conductive rod 4 is opened. In this way, the installation position of the bolt can be selected according to the different installation positions, so that there is an obvious fracture, which is conducive to the judgment of the maintenance personnel and the maintenance is safer.

[0029] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A closed jet-type isolating fuse, comprising an isolating switch (1) and a closed jet-type fuse (2), wherein the isolating switch (1) comprises two post insulators (3) and a conductive rod (4), wherein the conductive rod (4) is rotatably mounted on a first connecting plate (5) of one of the post insulators (3), and wherein: A limiting structure for limiting the conductive rod (4) to be at different opening angles is provided between the conductive rod (4) and the first connecting plate (5), and the limiting structure comprises: The first through hole (6) and the second through hole (7) are arranged at intervals along the width direction of the conductive rod (4) and can be used for the bolt (8) to pass through; A limiting portion (9) is provided on the first connecting plate (5), wherein when the bolt (8) is installed in the first through hole (6), the bolt (8) abuts against the limiting portion (9) when the conductive rod (4) is opened; and when the bolt (8) is installed in the second through hole (7), the bolt (8) abuts against the limiting portion (9) when the conductive rod (4) is opened.

2. The enclosed jet-type isolating fuse according to claim 1, characterized in that: The bolt (8) comprises a head (11) and a screw portion (12); the conductive rod (4) is formed with a groove (13) suitable for mounting the head (11), and the first through hole (6) or the second through hole (7) is arranged at the middle position of the bottom of the groove (13); the conductive rod (4) is also provided with a channel (14) connecting the first through hole (6) and the second through hole (7) and only for the reciprocating movement of the screw portion (12).

3. The enclosed jet-type isolating fuse according to claim 2, characterized in that: The head (11) is polygonal, and the shape of the groove (13) is adapted to the polygonal head (11).

4. The enclosed jet-type isolating fuse according to claim 1, characterized in that: The enclosed ejection type fuse (2) and the post insulator (3) are both fixed on the same mounting bracket (15).

5. The enclosed jet-type isolating fuse according to claim 4, characterized in that: The mounting bracket (15) is made of U-shaped channel steel.

6. The enclosed jet-type isolating fuse according to claim 1, characterized in that: The two post insulators (3) are both made of ceramic insulating parts.

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