Windproof isolated fuse

Abstract

The utility model relates to a windproof isolation type fuse, which comprises a base, an insulator, a contact assembly, an isolation knife switch, a fusion tube and a fuse wire, two conductive sections of the isolation knife switch are respectively provided with a wiring assembly, each wiring assembly comprises a fixed seat, a threading sleeve and an elastic clamping plate, the fixed seat is fixedly arranged on the isolation knife switch, the threading sleeve is arranged on the fixed seat, and the elastic clamping plate is arranged on the threading sleeve. The threading sleeve is fixedly connected to the fixing seat, the inner diameter of the threading sleeve is matched with the outer diameter of a fuse wire, a wire clamping window is formed in the side wall of the threading sleeve, the elastic clamping plate is fixedly arranged on the isolating knife switch and located on one side of the threading sleeve, and a wire clamping block extending into the wire clamping window is formed at the end of the elastic clamping plate. The side surface of the wire clamping block is provided with a plurality of wire clamping protrusions which extend into the threading sleeve and are in a cut-and-plug shape. According to the windproof isolation type fuse, the fuse wire and the isolation knife switch are connected more conveniently and more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a windproof isolation type fuse. Background Art

[0002] An isolation fuse is a high-voltage switch that switches a high-voltage circuit on and off by opening and closing an isolation knife. To achieve better fuse protection, existing technologies, such as the utility model patent: A new type of BRG high-voltage switch with fuse protection (Announcement No.: CN204242918U), include a fuse protection device in the middle of the moving contact copper ruler (i.e., the isolation knife). The material is high-quality silicone rubber, and a fixing bracket for fixing the fuse tube is installed in this position. The fuse tube is restrained by a spring and a high-voltage fuse passing through it. Once the fuse breaks, The fuse tube immediately pops open under the action of the spring, so that the fault can be clearly detected and the purpose of fuse protection is achieved. In order to achieve fuse protection, the two ends of the fuse must be fixedly connected to the conductive section of the moving contact copper ruler. In the above structure, the fuse wrapped on the bolt standard part is pressed against the moving contact copper ruler by a bolt standard part screwed on the moving contact copper ruler to maintain contact with the moving contact copper ruler. However, the above method of fixedly connecting the fuse is easy to fall off the bolt standard part and separate from the moving contact copper ruler when the fuse swings due to strong wind, and the operation of fixing the fuse is not convenient enough.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a windproof isolating fuse, which solves the above-mentioned problems existing in the prior art during use.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A windproof isolating fuse comprises a base, an insulator, a contact assembly, an isolating knife, a fusible tube and a fusible wire. A rotating shaft is provided at the lower end of the isolating knife and can be rotatably mounted on a mounting frame provided on the base. A pull ring is provided at the upper end of the isolating knife. A wiring assembly is provided on each of the two conductive segments of the isolating knife. The wiring assembly comprises a fixed seat, a wire threading sleeve and an elastic clamping plate. The fixed seat is fixedly provided on the isolating knife. The wire threading sleeve is fixedly connected to the fixed seat and the inner diameter of the wire threading sleeve matches the outer diameter of the fusible wire. A wire clamping window is provided on the side wall of the wire threading sleeve. The elastic clamping plate is fixedly provided on the isolating knife and is located on one side of the wire threading sleeve. A wire clamping block is formed at the end of the elastic clamping plate and extends into the wire clamping window. A plurality of wire clamping protrusions that extend into the wire threading sleeve and are in the form of a trench plug are formed on the side of the wire clamping block.

[0007] Preferably, the isolation knife switch is fixed with a supporting plate on one side of the elastic clamping plate, and a tightening bolt is screwed on the supporting plate and has an end directed to the wire clamping block.

[0008] Preferably, the wire sleeve is in a circular arc shape, and the side of the wire clamping block, on which the wire clamping protrusion is formed, is in a circular arc shape.

[0009] Preferably, the pull ring is rotatably arranged on the isolation knife switch, a clamping hook in a hook shape is rotatably arranged on the isolation knife switch at one end of the pull ring, a first abutting part and a second abutting part are respectively formed on the clamping hook and the pull ring and are matched with each other, a torsion spring is sleeved on a rotating shaft of the clamping hook and acts on the clamping hook to keep the first abutting part and the second abutting part abutting with each other, and a clamping plate is arranged on the isolation knife switch at one side of the end of the clamping hook, and a clamping groove matched with the end of the clamping hook is formed in the clamping plate.

[0010] Preferably, a positioning groove is formed in the inner wall of the pull ring.

[0011] Preferably, an extension is formed on the side of the pull ring along each of the two notches of the positioning groove.

[0012] Preferably, an operation hole is formed in the lower end of the isolation knife switch.

[0013] In summary, the wire clamping protrusion is tightly abutted on the fuse wire inserted into the wire sleeve through the elastic swing of the elastic clamping plate, the fuse wire and the wire assembly are fixedly connected to realize the connection between the fuse wire and the isolation knife switch, the connection operation is more convenient, the fuse wire can be stably kept in the wire sleeve and connected with the isolation knife switch through the cooperation of the elastic clamping plate and the wire clamping protrusion, even if the fuse wire is loose in the wire sleeve, the fuse wire can also be kept connected with the isolation knife switch due to the excess of the fuse wire passing through the wire sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 is a structural schematic view of the present application;

[0016] Figure 2 is Figure 1 is an enlarged schematic view of A in FIG.

[0017] Figure 3 is Figure 1An enlarged schematic view at B;

[0018] Figure 4 A structure schematic view of the wiring assembly in the utility model;

[0019] Figure 5 A structure schematic view of the buckle assembly in the utility model.

[0020] In the figure: 1, base; 2, insulator; 4, contact assembly; 5, isolation knife switch; 51, rotating shaft; 52, operation hole; 6, fuse tube; 7, fuse wire; 8, hanging rack; 9, pull ring; 91, second abutting portion; 92, positioning groove; 93, extension; 10, wiring assembly; 101, fixed seat; 102, wiring sleeve; 103, elastic clamping plate; 104, wire clamping window; 105, wire clamping block; 106, wire clamping protrusion; 107, support plate; 108, jacking bolt; 11, clamping hook; 111, first abutting portion; 12, torsion spring; 13, clamping plate; 131, clamping groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Figures 1-5 It is obvious that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0022] As shown in the figure, a windproof type isolation fuse includes a base 1, an insulator 2, a contact assembly 4, an isolation gate 5, a fuse tube 6 and a fuse wire 7, the isolation gate 5 is composed of two conductive sections at upper and lower ends and an insulating section in the middle, a rotating shaft 51 provided at the lower end of the isolation gate 5 is rotatably hung on a hanging rack 8 provided on the base 1, a pull ring 9 is provided at the upper end of the isolation gate 5, the fuse tube 6 is swingably arranged on the isolation gate 5, the fuse wire 7 is arranged in the fuse tube 6, two contact assemblies 4 are arranged on the base 1 and respectively match with the two conductive sections of the isolation gate 5, a wiring assembly 10 is arranged on each of the two conductive sections of the isolation gate 5, the wiring assembly 10 includes a fixing seat 101, a wire sleeve 102 and an elastic clamping plate 103, the fixing seat 101 is fixedly arranged on the isolation gate 5, the wire sleeve 102 is fixedly connected to the fixing seat 101 and the inner diameter of the wire sleeve 102 matches with the outer diameter of the fuse wire 7, a wire clamping window 104 is formed in the side wall of the wire sleeve 102, the elastic clamping plate 103 is fixedly arranged on the isolation gate 5 at one side of the wire sleeve 102 and an end of the elastic clamping plate 103 forms a wire clamping block 105 extending into the wire clamping window 104, a plurality of wire clamping protrusions 106 extending into the wire sleeve 102 in a blocking type are formed on the side of the wire clamping block 105.

[0023] Specifically, a screw rod is fixedly connected to the fixing seat 101, the screw rod is screwed with a nut after penetrating through the isolation gate 5 to realize the fixed connection between the fixing seat 101 and the isolation gate 5, and the elastic plate is fixedly connected to the isolation gate 5 through a bolt.

[0024] In the above structure, the fusible link 7 is fixedly connected to the two terminal assemblies 10 after being inserted into the fuse tube 6, and the specific operation is that the elastic clamping plate 103 is swung away from the terminal sleeve to drive the clamping protrusion 106 to exit the terminal sleeve and enter the clamping window 104, then the end of the fusible link 7 is inserted into the terminal sleeve, the elastic clamping plate 103 is loosened to reset the clamping protrusion 106 to tightly abut against the fusible link 7 in the terminal sleeve to achieve the pre-fixing of the fusible link 7, after the two ends of the fusible link 7 are respectively pre-fixed in the two terminal assemblies 10, the fusible link 7 is pulled along the inclined surface of the clamping protrusion 106, and the clamping protrusion 106 is in a trench block type, so that the fusible link 7 can slide along the inclined surface of the clamping protrusion 106 in the terminal sleeve under the action of a certain force, and the sliding of the fusible link 7 in the opposite direction is limited, after the fusible link 7 is pulled and tightened, the fusible link 7 is connected to the isolation switch 5, through the above structure and mode, the connection operation of the fusible link 7 and the isolation switch is more convenient, and through the cooperation of the elastic clamping plate 103 and the clamping protrusion 106, the fusible link 7 can be stably kept in the terminal sleeve and connected to the isolation switch 5, even if the fusible link 7 is loose in the terminal sleeve, the fusible link 7 can also be kept connected to the isolation switch 5 due to the excess of the fusible link 7 inserted into the terminal sleeve.

[0025] In addition, on the basis of the above structure, the support plate 107 is fixedly arranged on the isolation switch 5 and located on one side of the elastic clamping plate 103, and the tightening bolt 108 with the end facing the clamping block 105 is screwed on the support plate 107, when the end of the fusible link 7 is connected to the terminal assembly 10, the tightening bolt 108 is rotated to make the end thereof away from the elastic clamping plate 103 to provide space for the elastic swing of the elastic clamping plate 103, after the fusible link 7 is fixedly connected to the terminal assembly 10, the tightening bolt 108 is rotated to make the end thereof tightly abut against the clamping block 105 to limit the outward swing of the clamping block 105 and tightly abut against the fusible link 7 inserted into the terminal sleeve, thereby enhancing the stability of the fusible link 7 fixedly connected to the terminal assembly 10.

[0026] In addition, on the basis of the above structure, the terminal sleeve 102 is in a circular arc shape, and the side of the clamping block 105 where the clamping protrusion 106 is formed is in a circular arc shape, so that the clamping protrusions 106 are arranged in a ring array on the clamping block 105, and the part of the fusible link 7 inserted into the terminal sleeve is in a curved shape, so that the fusible link 7 can be more stably kept in the terminal sleeve and not easily slide when the fusible link 7 is subjected to an external force along the length direction of the fusible link 7, thereby enhancing the stability of the fusible link 7 fixedly connected to the terminal assembly 10.

[0027] Further, on the basis of the above structure, the pull ring 9 is rotationally arranged on the isolation gate 5, a clamping hook 11 in the shape of a hook is arranged on one side end of the pull ring 9, a first abutting portion 111 and a second abutting portion 91 are respectively formed on the clamping hook 11 and the pull ring 9, a torsion spring 12 is sleeved on the rotating shaft of the clamping hook 11 and acts on the clamping hook 11 to keep the first abutting portion 111 and the second abutting portion 91 in abutment, a clamping plate 13 is arranged on the isolation gate 5 at one side of the end of the clamping hook 11, and a clamping groove 131 matching the end of the clamping hook 11 is formed on the clamping plate 13. When the isolation gate 5 is closed by swinging the upper end of the contact assembly 4 into the corresponding position, the end of the clamping hook 11 is swung and the torsion spring 12 is twisted by the clamping plate 13, and the end of the clamping hook 11 is moved to the clamping groove 131 and clamped in the clamping groove 131 under the restoring force of the torsion spring 12. The clamping hook 11 and the clamping groove 131 limit the swinging of the isolation gate 5, thereby enhancing the stability of the closed isolation gate 5 and the windproof performance of the fuse. When the isolation gate 5 needs to be opened under live voltage, the working head of the crowbar is inserted into the pull ring 9 to swing the pull ring 9 on the isolation gate 5, the pull ring 9 swings the clamping hook 11 through the abutting cooperation of the second abutting portion 91 and the first abutting portion 111, and the end of the clamping hook 11 is pulled out of the clamping groove 131. At this time, the isolation gate 5 can be opened by swinging the isolation gate 5 through the pull ring 9.

[0028] Further, on the basis of the above structure, a positioning groove 92 is formed on the inner wall of the pull ring 9, the positioning groove 92 is located at the upper end of the pull ring 9 and matches the working head of the crowbar. When the isolation gate 5 needs to be hung on the mounting rack 8 by using the crowbar, the working head of the crowbar is clamped in the positioning groove 92, the working head of the crowbar is limited in the movement of the pull ring 9 by the action of the positioning groove 92, the stability of the isolation gate 5 is enhanced when the isolation gate 5 is lifted by the crowbar, and the lower end of the rotating shaft 51 of the isolation gate 5 is more easily hung on the mounting rack 8, thereby facilitating the operation of hanging and installing the isolation gate 5.

[0029] Further, on the basis of the above structure, an extension 93 is formed on the side surface of the pull ring 9 along the two grooves of the positioning groove 92. The extension 93 increases the axial length of the positioning groove 92 and increases the contact area of the working head of the crowbar clamped in the positioning groove 92 and the pull ring 9, thereby enhancing the stability of the isolation gate 5 when the isolation gate 5 is lifted by the crowbar.

[0030] In addition, on the basis of the above structure, the isolation knife 5 is provided with an operation hole 52 at the lower end, and in the working condition of mounting the isolation knife 5, the lower end of the isolation knife 5 is operated by using another lug rod, and the working head of the lug rod is inserted into the operation hole 52, so that the lower end of the isolation knife 5 is aligned with the mounting rack 8, and the rotating shaft 51 is mounted on the mounting rack 8.

[0031] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A windproof type isolating fuse, comprising a base (1), an insulator (2), a contact assembly (4), an isolating shutter (5), a fuse tube (6) and a fuse wire (7), a rotating shaft (51) provided at a lower end of the isolating shutter (5) being rotatably hung on a hanging rack (8) provided on the base (1), a pull ring (9) being provided at an upper end of the isolating shutter (5), characterized in that: The two conductive sections of the isolation knife switch (5) are respectively provided with a wiring assembly (10), the wiring assembly (10) comprises a fixing seat (101), a threading sleeve (102) and an elastic clamping plate (103), the fixing seat (101) is fixedly arranged on the isolation knife switch (5), the threading sleeve (102) is fixedly connected to the fixing seat (101) and the inner diameter of the threading sleeve (102) matches the outer diameter of the fuse (7), the clamping window (104) is arranged on the side wall of the threading sleeve (102), the elastic clamping plate (103) is fixedly arranged on the isolation knife switch (5) on one side of the threading sleeve (102) and the end of the elastic clamping plate (103) is provided with a clamping block (105) extending into the clamping window (104), and the side surface of the clamping block (105) is provided with a plurality of clamping protrusions (106) extending into the threading sleeve (102) in a blocking mode.

2. The windproof type isolation fuse according to claim 1, characterized in that: The isolation knife switch (5) is fixedly provided with a supporting plate (107) on one side of the elastic clamping plate (103), and the supporting plate (107) is screwed with a jacking bolt (108) with an end portion facing the clamping block (105).

3. The windproof type isolation fuse according to claim 2, characterized in that: The threading sleeve (102) is in a circular arc shape, and the side surface of the clamping block (105) forming the clamping protrusion (106) is in a circular arc shape.

4. The windproof type isolation fuse according to claim 3, characterized in that: The pull ring (9) is rotatably arranged on the isolation knife switch (5), the isolation knife switch (5) is rotatably arranged with a clamping hook (11) with a hook-shaped end portion on one side of the pull ring (9), the clamping hook (11) and the pull ring (9) are respectively provided with a first abutting portion (111) and a second abutting portion (91) matched with each other, a torsional spring (12) is arranged on the rotating shaft of the clamping hook (11) and acts on the clamping hook (11) to keep the first abutting portion (111) and the second abutting portion (91) abutting, and the isolation knife switch (5) is provided with a clamping plate (13) on one side of the end portion of the clamping hook (11), and the clamping plate (13) is provided with a clamping groove (131) matched with the end portion of the clamping hook (11).

5. The windproof type isolation fuse according to claim 4, characterized in that: The inner wall of the pull ring (9) is provided with a positioning groove (92).

6. The windproof type isolation fuse according to claim 5, characterized in that: The side surface of the pull ring (9) is provided with an extension (93) extending along the two grooves of the positioning groove (92).

7. The windproof type isolation fuse according to claim 6, characterized in that: The lower end of the isolation knife switch (5) is provided with an operation hole (52).

Images