CN214152836U - Totally enclosed drop-out fuse with visible fracture - Google Patents
Totally enclosed drop-out fuse with visible fracture Download PDFInfo
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- CN214152836U CN214152836U CN202023048364.7U CN202023048364U CN214152836U CN 214152836 U CN214152836 U CN 214152836U CN 202023048364 U CN202023048364 U CN 202023048364U CN 214152836 U CN214152836 U CN 214152836U
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- 230000000149 penetrating effect Effects 0.000 claims description 3
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- 230000001681 protective effect Effects 0.000 description 2
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Abstract
The utility model provides a totally enclosed drop fuse with visible fracture should fall the fuse and include: the insulation box and the insulation cover plate; the insulating box is of a box body structure with one open end, and an upper static contact and a lower static contact are respectively arranged at the upper end and the lower end in the insulating box; the upper end of the insulating cover plate is provided with an upper moving contact matched with the upper static contact, the lower end of the insulating cover plate is provided with a lower moving contact matched with the lower static contact, and the lower moving contact is hung on the lower static contact and is rotatably connected with the lower static contact. The utility model discloses realize that insulating cover opens and the switching of closed condition, on insulating cover lock on insulating box, form between insulating cover and the insulating box and seal insulating cavity, will go up the static contact, go up the moving contact, lower static contact and moving contact seal in sealing insulating cavity down, avoid branch, aerial floater to hang on metal parts such as last static contact, last moving contact, lower static contact and moving contact down.
Description
Technical Field
The utility model relates to an electrical apparatus switch technical field particularly, relates to a totally enclosed drop out fuse with visible fracture.
Background
The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. Therefore, the protective device is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protective devices as a short circuit protector and an overcurrent protector.
Referring to fig. 1, a schematic diagram of a drop fuse in the prior art is shown. As shown, the drop fuse includes: the device comprises an upper wiring terminal 1', an upper static contact 2', an upper moving contact 3', an operating ring 4', a fusion tube 5', a lower moving contact 6', a lower static contact 7', a lower wiring terminal 8', a fixed mounting plate 9 'and an insulator 10'. When the fuse is required to drop and break a circuit, the operating ring 4 'is hooked by an operating tool and pulled downwards, so that the upper static contact 2' and the upper moving contact 3 'can be separated, and the fusion tube 5' rotates clockwise along the hanging part of the lower moving contact 6 'and the lower static contact 7', so that the upper static contact 2 'and the upper moving contact 3' are separated to form an isolation fracture; otherwise, the circuit is closed, and a complete conduction circuit is formed through the fusion tube 5' to supply power; if short-circuit fault current occurs when the circuit is conducted and normally powered, a fuse wire in the fusion tube 5 'is fused, the short-circuit fault current is cut off, then a spring installed in the lower static contact 7' is triggered and released, the upper moving contact 3 'and the upper static contact 2' on the fusion tube 5 'are bounced open, the fusion tube 5' rotates clockwise along the hanging part of the lower moving contact 6 'and the lower static contact 7' and is opened, and the upper static contact 2 'and the upper moving contact 3' are separated to form an isolation fracture; and then, an operating tool can be used for hooking the operating ring 4 'to separate the lower moving contact 6' from the lower static contact 7', and the fusion tube 5' is taken down for maintenance and replacement so as to be recovered for use.
In the prior art, an upper wiring terminal 1', an upper static contact 2', an upper moving contact 3', an operating ring 4', a fusion tube 5', a lower moving contact 6', a lower static contact 7 'and a lower wiring terminal 8' arranged on a high-voltage electrified metal part are exposed, so that branches and floating objects in the air are easily hung on the high-voltage electrified metal parts to form a conductive channel, and interphase or ground short circuit of a drop fuse is caused to form a fault, thereby seriously affecting the safe operation of a power grid.
Disclosure of Invention
In view of this, the utility model provides a totally enclosed drop fuse with visible fracture aims at solving the spare part on the current high-voltage live metalwork and exposes and make branch, aerial floater hang on these high-voltage live metal part very easily, leads to falling the alternate or to ground short circuit formation trouble of fuse and seriously influenced the problem of the safe operation of electric wire netting.
The utility model provides a totally enclosed drop fuse with visible fracture should fall the fuse and include: the insulation box and the insulation cover plate; the insulating box is of a box body structure with an opening at one end, and an upper static contact and a lower static contact are respectively arranged at the upper end and the lower end in the insulating box; an upper moving contact matched with the upper fixed contact is arranged at the upper end of the insulating cover plate, a lower moving contact matched with the lower fixed contact is arranged at the lower end of the insulating cover plate, and the lower moving contact is hung on the lower fixed contact and is rotatably connected with the lower fixed contact; when the switch is switched on, the upper moving contact is connected with the upper fixed contact in a matching way, and the insulating cover plate is buckled at the opening of the insulating box to form a closed insulating cavity so as to seal the upper fixed contact, the upper moving contact, the lower fixed contact and the lower moving contact in the closed insulating cavity; when the switch is in the open state, the insulating cover plate is in the open state, and the upper moving contact is separated from the upper fixed contact to form an isolation fracture.
Further, the above-described totally enclosed drop fuse having a visible fracture, the insulating case comprises: an insulating support plate and an insulating shutter; the insulating support plate is of a rectangular structure, and insulating side plates are arranged on three side edges of the insulating support plate and are perpendicular to the insulating support plate; the insulating valve can be rotatably connected to the other side edge of the insulating support plate to rotate to a closed state to form a box-packed structure with an opening at one end, or to rotate to an open state to form a fracture structure.
Further, the above-mentioned totally enclosed drop fuse having a visible fracture has the insulating shutter and the insulating support plate rotatably connected by a rotation shaft.
Further, according to the totally enclosed drop fuse with the visible fracture, the reset spring is arranged between the insulating valve and the insulating support plate to apply reset force to the insulating valve, so that the insulating valve is reset to a closed state.
Further, in the totally enclosed drop-out fuse with the visible fracture, the lower static contact is provided with a hanging groove, and an opening of the hanging groove is arranged upwards; the lower moving contact is provided with a rotating shaft penetrating through the lower moving contact, the rotating shaft is detachably connected in the hanging groove in a hanging mode, and the rotating shaft is rotatably connected with the hanging groove.
Further, in the totally enclosed drop fuse with the visible fracture, a fusion tube is arranged between the upper moving contact and the lower moving contact, and two ends of the fusion tube are respectively connected to the upper moving contact and the lower moving contact.
Further, in the totally enclosed drop-out fuse with the visible fracture, the insulating cover plate is provided with an operating ring, and the operating ring and the upper moving contact are respectively arranged on two sides of the insulating cover plate.
Furthermore, in the totally enclosed drop-out fuse with the visible fracture, an upper insulated wire outlet terminal is arranged on the outer wall of the insulating box and connected with the upper fixed contact to connect a distribution line.
Further, in the totally enclosed drop-out fuse with the visible fracture, a lower insulated outlet terminal is arranged on the outer wall of the insulating box and connected with the lower static contact for connecting a transformer.
Further, the totally enclosed drop fuse with the visible fracture is characterized in that a fixed insulator is arranged on the outer wall of the insulating box.
The utility model provides a totally enclosed drop fuse with visible fracture, rotatable coupling between lower moving contact and the lower static contact not only can make the separation between upper static contact and the upper moving contact, so as to form the isolation fracture, but also can realize the switching between the open state and the closed state of the insulating cover plate, so as to be buckled on the insulating box when the insulating cover plate is in the closed state, so as to form a closed insulating cavity between the insulating cover plate and the insulating box, further seal the upper static contact, the upper moving contact, the lower static contact and the lower moving contact in the closed insulating cavity, avoid the branches, the floating objects hanging on the metal parts such as the upper static contact, the upper moving contact, the lower static contact and the lower moving contact, further avoid the branches, the floating objects and the metal parts to form a conductive channel, thereby avoiding the phase-to-ground short circuit of the drop fuse from influencing the safe operation of the electric wire netting, i.e. ensuring safe operation of the grid. Simultaneously, the lower moving contact articulates under on the stationary contact, can realize dismantling between the two and connect to wholly take off insulating cover plate after the fusion tube fusing, and then be convenient for on the insulating cover plate spare part for example the maintenance of fusion tube change.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a prior art drop fuse;
fig. 2 is a schematic structural diagram of a totally enclosed drop fuse with a visible fracture in a closed state according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a totally enclosed drop fuse with a visible fracture in an open state according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 2 to 3, a preferred structure of a totally enclosed drop fuse with a visible fracture provided by an embodiment of the present invention is shown. As shown, the totally enclosed drop fuse includes: an insulating box 1 and an insulating cover plate 2; wherein,
the insulating box 1 is a box structure with an opening at one end (as shown in fig. 2, the right end is open), and an upper static contact 3 and a lower static contact 4 are respectively arranged at the upper end and the lower end in the insulating box 1. Specifically, the insulating box 1 may be a square box structure with an opening at the right end, the upper static contact 3 is fixedly connected to the upper end inside the box body of the insulating box 1, and the lower static contact 4 is fixedly connected to the lower end inside the box body of the insulating box 1. Preferably, an upper insulation outlet terminal 11 is disposed on an outer wall of the insulation box 1, and is connected to the upper stationary contact 3 for connecting to a distribution line (not shown in the figure) to realize connection between the upper stationary contact 3 and the distribution line; the outer wall of the insulating box 1 is provided with a lower insulating outlet terminal 12, which is connected to the lower stationary contact 4 and is used for connecting a transformer (not shown in the figure) to realize the connection between the lower stationary contact 4 and the transformer. The outer wall of the insulating box 1 may further be provided with a fixing insulator 13, which may be a full insulator, and may be adhered to the outer wall of the insulating box 1 through an adhesive or the like, i.e., a wall surface facing away from the inside of the box body, and may be disposed between the upper insulating outlet terminal 11 and the lower insulating outlet terminal 12 to increase the insulating property of the insulating box 1. The upper insulation outlet terminal 11 and the lower insulation outlet terminal 12 may also be all insulators, and may be adhered to the outer wall of the insulation box 1 by adhesive or the like, or may be fixed by other methods.
An upper moving contact 5 matched with the upper static contact 3 is arranged at the upper end of the insulating cover plate 2, a lower moving contact 6 matched with the lower static contact 4 is arranged at the lower end of the insulating cover plate 2, and the lower moving contact 6 is hung on the lower static contact 4 and is rotatably connected with the lower static contact 6. Specifically, be equipped with fusion tube 7 between last moving contact 5 and the moving contact 6 down, its both ends are connected respectively on last moving contact 5 and moving contact 6 down, and accessible fuse ties on last moving contact 5 and moving contact 6 down, pushes up moving contact 5 into "duckbill" bulge, and the last static contact 3 that phosphor copper sheet etc. was made is pushing up moving contact 5, so fusion tube 7 firmly blocks in "duckbill". In order to facilitate the switching-on and switching-off operations of the insulating cover plate 2, it is preferable that an operation ring 21 is disposed on the insulating cover plate 2, and the operation ring 21 and the upper movable contact 4 are respectively disposed on two sides (left and right sides as shown in fig. 2) of the insulating cover plate 2, so that the upper movable contact 4 can be enclosed in an enclosed insulating cavity formed by the insulating box 1 and the insulating cover plate 2, and the operation ring 21 is located outside the enclosed insulating cavity, so as to perform switching between the switching-on state and the switching-off state.
In order to facilitate the rotatable connection between the lower movable contact 6 and the lower stationary contact 5, the lower stationary contact 5 is preferably provided with a hanging groove (not shown) with an opening facing upwards (with respect to the position shown in fig. 2); the lower moving contact 6 is provided with a rotating shaft 61 penetrating through the lower moving contact 6, the rotating shaft 61 is detachably connected in the hanging groove in a hanging mode, and the rotating shaft 61 is rotatably connected with the hanging groove. Specifically, the lower moving contact 6 may be two sheet structures arranged at an interval, the rotating shaft 61 is connected between the two sheet structures, so as to be hooked into the hanging groove from an opening of the hanging groove through the rotating shaft, and is rotatably clamped in the hanging groove, so as to realize rotatable connection between the lower moving contact 6 and the lower static contact 5, so as to realize falling of the fusion tube 7, and further disconnect a circuit to cut off a fault section line or fault equipment; meanwhile, the lower moving contact 6 and the lower static contact 5 are hung, so that the lower moving contact 6 and the lower static contact 5 can be conveniently detached, namely the insulating cover plate 2 and the insulating box 1 are detached, and then the insulating cover plate 2 can be taken down from the insulating box 1 to replace the fusion tube 7 or perform other operations. The insulating cover plate 2 and the upper part thereof are hung on the insulating sealing box 1 through a rotating shaft 61, so that the insulating cover plate 2 can rotate relative to the insulating box 1 to realize the closing of the sealed insulating cavity. In order to realize the falling of the fuse tube 7 after the fuse is fused, preferably, a stress spring (not shown in the figure) for ejecting the fuse tube 7 backward is further arranged on the lower moving contact 6, the stress spring stores energy when the fuse is not fused, and the stress spring ejects the fuse tube 7 outward after the fuse is fused, namely, the fuse tube 7 rotates clockwise, so that the insulating cover plate 2 synchronously rotates clockwise along with the fuse tube 7.
When the circuit is switched on, as shown in fig. 2, the upper moving contact 3 is connected with the upper static contact 5 in a matching manner, and the insulating cover plate 2 is buckled at the opening of the insulating box 1 to form a closed insulating cavity, so that the upper static contact 3, the upper moving contact 5, the lower static contact 4 and the lower moving contact 6 are closed in the closed insulating cavity, a circuit is switched on, the communication between a distribution line and a transformer is realized, and a complete conduction circuit is formed for power supply; when the switch is in the open state, as shown in fig. 3, the insulating cover plate 2 rotates clockwise to the open state, the upper moving contact 3 is separated from the upper static contact 5 to form an isolation fracture, so that the circuit is disconnected, and a fault section line or fault equipment is cut off; when short-circuit current passes through the fusion tube 7 to cause the fusion tube 7 to be fused, electric arc is generated, a steel paper tube lined in the fusion tube 7 generates a large amount of gas under the action of the electric arc, the gas is sealed because of the upper end of the fusion tube 7, and the gas is sprayed out to the lower end to blow out the electric arc; because the fusion tube 7 is fused, the upper and lower moving contacts of the fusion tube 7 lose the fastening force of the fuse, the upper static contact 3 and the upper moving contact 5 are separated by bouncing under the action of the gravity of the fusion tube 7 and a stress spring, the fusion tube 7 rapidly falls, namely rotates clockwise, a circuit is disconnected, a fault section line or fault equipment is cut off, and the insulating cover plate 2 can be integrally taken down for maintenance and replacement.
With continued reference to fig. 2 to 3, the insulating case 1 includes: an insulating support plate 14 and an insulating shutter 15; the insulating support plate 14 is of a rectangular structure, and insulating side plates 16 are arranged on three side edges of the insulating support plate 14, and the insulating side plates 16 are arranged perpendicular to the insulating support plate 14; the insulation valve 15 is rotatably connected to the other side of the insulation support plate 14 to rotate to a closed state to form a box structure with one open end, or to rotate to an open state to form a fracture structure. Specifically, the insulating support plate 14 and the insulating side plate 16 may be an integral structure, forming a structure with two open sides; the insulation shutter 15 is rotatably connected to the bottom side of the insulation support plate 14 (with respect to the position shown in fig. 1), and the insulation shutter 15 and the insulation support plate 14 are rotatably connected by a rotating shaft 17 to close or open the insulation shutter 15, thereby closing or opening the insulation box 1, so that a visible cut can be formed at the bottom of the insulation box 1. Preferably, a return spring (not shown) is provided between the insulating shutter 15 and the insulating support plate 11 to apply a return force to the insulating shutter 14 so as to return the insulating shutter 15 to the closed state, so that when the insulating shutter 15 is in a normal, i.e., free state, the insulating shutter 15 is returned to the closed position, as shown in fig. 2, by the return spring. Parts arranged on the insulating box 1, such as the upper fixed contact 3, the lower fixed contact 4, the upper insulating outlet terminal 11, the lower insulating outlet terminal 12, the fixed insulator 13 and the like, can be arranged on an integrated structure formed by the insulating support plate 14 and the insulating side plate 16, and are higher in stability compared with the parts arranged on the insulating valve 15.
In summary, in the totally enclosed drop fuse with a visible fracture provided in this embodiment, the rotatable connection between the lower moving contact and the lower fixed contact not only can separate the upper fixed contact from the upper moving contact to form an isolation fracture, but also can realize the switching between the open state and the closed state of the insulating cover, so as to be fastened on the insulating box when the insulating cover is in the closed state, so as to form a closed insulating cavity between the insulating cover and the insulating box, further seal the upper fixed contact, the upper moving contact, the lower fixed contact and the lower moving contact in the closed insulating cavity, avoid the branches and the air floating objects from hanging on the metal components such as the upper fixed contact, the upper moving contact, the lower fixed contact and the lower moving contact, further avoid the branches, the air floating objects and the metal components from forming a conductive channel, thereby avoiding the phase-to-ground short circuit of the drop fuse from affecting the safe operation of the power grid, i.e. ensuring safe operation of the grid. Simultaneously, the lower moving contact articulates under on the stationary contact, can realize dismantling between the two and connect to wholly take off insulating cover plate after the fusion tube fusing, and then be convenient for on the insulating cover plate spare part for example the maintenance of fusion tube change.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A totally enclosed drop fuse having a visible break, comprising: the insulation box and the insulation cover plate; wherein,
the insulating box is of a box body structure with an opening at one end, and an upper static contact and a lower static contact are respectively arranged at the upper end and the lower end in the insulating box;
an upper moving contact matched with the upper fixed contact is arranged at the upper end of the insulating cover plate, a lower moving contact matched with the lower fixed contact is arranged at the lower end of the insulating cover plate, and the lower moving contact is hung on the lower fixed contact and is rotatably connected with the lower fixed contact;
when the switch is switched on, the upper moving contact is connected with the upper fixed contact in a matching way, and the insulating cover plate is buckled at the opening of the insulating box to form a closed insulating cavity so as to seal the upper fixed contact, the upper moving contact, the lower fixed contact and the lower moving contact in the closed insulating cavity;
when the switch is in the open state, the insulating cover plate is in the open state, and the upper moving contact is separated from the upper fixed contact to form an isolation fracture.
2. The totally enclosed drop fuse with a visible fracture of claim 1, wherein the insulating box comprises: an insulating support plate and an insulating shutter; wherein,
the insulating support plate is of a rectangular structure, and insulating side plates are arranged on three side edges of the insulating support plate and are perpendicular to the insulating support plate;
the insulating valve can be rotatably connected to the other side edge of the insulating support plate to rotate to a closed state to form a box-packed structure with an opening at one end, or to rotate to an open state to form a fracture structure.
3. The totally enclosed drop fuse with visible fracture as claimed in claim 2, wherein the insulating shutter and the insulating support plate are rotatably connected by a rotating shaft.
4. The totally enclosed drop fuse with visible fracture of claim 2,
and a reset spring is arranged between the insulating valve and the insulating support plate to apply reset force to the insulating valve, so that the insulating valve is reset to a closed state.
5. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4,
the lower static contact is provided with a hanging groove, and the opening of the hanging groove is upward;
the lower moving contact is provided with a rotating shaft penetrating through the lower moving contact, the rotating shaft is detachably connected in the hanging groove in a hanging mode, and the rotating shaft is rotatably connected with the hanging groove.
6. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4,
a fusion tube is arranged between the upper moving contact and the lower moving contact, and two ends of the fusion tube are respectively connected to the upper moving contact and the lower moving contact.
7. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4,
an operating ring is arranged on the insulating cover plate, and the operating ring and the upper moving contact are respectively arranged on two sides of the insulating cover plate.
8. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4,
and an upper insulation outlet terminal is arranged on the outer wall of the insulation box and connected with the upper static contact for connecting a distribution line.
9. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4,
and a lower insulation outlet terminal is arranged on the outer wall of the insulation box and connected with the lower static contact for connecting a transformer.
10. The totally enclosed drop fuse with visible fracture according to any one of claims 1 to 4, wherein a fixing insulator is provided on an outer wall of the insulating case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023048364.7U CN214152836U (en) | 2020-12-17 | 2020-12-17 | Totally enclosed drop-out fuse with visible fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023048364.7U CN214152836U (en) | 2020-12-17 | 2020-12-17 | Totally enclosed drop-out fuse with visible fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214152836U true CN214152836U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023048364.7U Active CN214152836U (en) | 2020-12-17 | 2020-12-17 | Totally enclosed drop-out fuse with visible fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214152836U (en) |
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2020
- 2020-12-17 CN CN202023048364.7U patent/CN214152836U/en active Active
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