阅读说明：本技术 一种防坠地跌落式熔断器 (Prevent weighing down ground drop out fuse ) 是由 冯勋强 林英平 郭振伟 邵慧 都帅龙 郑乐民 史德生 王新生 赵谦 赵天宇 于 2019-10-12 设计创作，主要内容包括：本发明涉及配电保护附属装置的技术领域,特别是涉及一种防坠地跌落式熔断器,其保证熔丝管熔断后可靠跌落而不发生脱落坠地的情况,从而防止熔丝管损坏而无法及时恢复设备或者电力的情况,提高实用性；包括绝缘子、上安装架、下安装架和熔丝管,上安装架和下安装架分别安装于绝缘子的顶部和底部,上安装架和下安装架上分别设置有上静触头和下静触头,熔丝管的顶部和底部分别设置有上动触头和下动触头,还包括弹簧片和固定螺栓,下安装架上设置有弧形导向槽,并在弧形导向槽的底部设置有限位凸起,下动触头上安装有转轴,转轴可转动设置于弧形导向槽内,弹簧片为“U”型结构,弹簧片左端的前侧和后侧分别设置有前压片和后压片。(The invention relates to the technical field of distribution protection accessories, in particular to an anti-falling fuse which ensures that a fuse tube can reliably fall after being fused without falling off and falling to the ground, thereby preventing the fuse tube from being damaged and being incapable of recovering equipment or electric power in time and improving the practicability; the insulator comprises an insulator, go up the mounting bracket, mounting bracket and fuse tube down, go up the mounting bracket and install respectively in the top and the bottom of insulator with mounting bracket down, it has last static contact and lower static contact to go up to be provided with respectively on mounting bracket and the lower mounting bracket, the top and the bottom of fuse tube are provided with moving contact and moving contact down respectively, still include spring leaf and fixing bolt, be provided with the arc guide way down on the mounting bracket, and be provided with spacing arch in the bottom of arc guide way, install the pivot down on the moving contact, the pivot is rotatable to be set up in the arc guide way, the spring leaf is "U" type structure, preceding preforming and back preforming are provided with respectively to the front side and the rear side of spring leaf left.)

1. The anti-falling-down fuse comprises an insulator (1), an upper mounting frame (2), a lower mounting frame (3) and a fuse tube (4), wherein the upper mounting frame (2) and the lower mounting frame (3) are respectively mounted at the top and the bottom of the insulator (1), an upper static contact (5) and a lower static contact (6) are respectively arranged on the upper mounting frame (2) and the lower mounting frame (3), the fuse tube (4) is mounted between the upper mounting frame (2) and the lower mounting frame (3), the bottom of the fuse tube (4) is rotatably connected with the lower mounting frame (3), an upper moving contact (7) and a lower moving contact (8) are respectively arranged at the top and the bottom of the fuse tube (4), and the upper moving contact (7) and the lower moving contact (8) are respectively and electrically connected with the upper static contact (5) and the lower static contact (6); it is characterized by also comprising a spring piece (9) and a fixing bolt (10), wherein an arc-shaped guide groove (11) is arranged on the lower mounting rack (3), a limiting bulge (12) is arranged at the bottom of the arc-shaped guide groove (11), a rotating shaft (13) is arranged on the lower moving contact (8), the rotating shaft (13) is rotatably arranged in the arc-shaped guide groove (11), the spring piece (9) is fixedly arranged at the top end of the lower mounting frame (3) through the fixing bolt (10), the spring piece (9) is of a U-shaped structure, the front side and the rear side of the left end of the spring piece (9) are respectively provided with a front pressing piece (14) and a rear pressing piece (15), the front pressing piece (14) and the rear pressing piece (15) are integrally formed with the spring piece (9) in a punching way, the front pressing piece (14) and the rear pressing piece (15) are respectively positioned on the front side and the rear side of the lower mounting frame (3), and the front pressing piece (14) and the rear pressing piece (15) are respectively positioned at the front side and the rear side of the arc-shaped guide groove (11).

2. The fall-preventing drop-out fuse as claimed in claim 1, wherein the cross section of the upper mounting bracket (2) is an inverted "U" shaped structure, and the upper stationary contact (5) is located in the inverted "U" shaped structure of the upper mounting bracket (2).

3. A fall-preventing drop-out fuse as claimed in claim 1, wherein the bottom end of the upper mounting bracket (2) is provided with a U-shaped limiting frame (16) for limiting the fuse tube (4).

4. The fall-preventing drop-out fuse as claimed in claim 1, wherein the upper mounting frame (2) and the lower mounting frame (3) are both provided with wiring terminals (17), and the two groups of wiring terminals (17) are respectively electrically connected with the upper static contact (5) and the lower static contact (6).

5. A safety drop out fuse as claimed in claim 1, wherein the spring plate (9), the front blade (14) and the rear blade (15) are made of stainless steel, and the front blade (14) and the rear blade (15) are both inclined downwardly.

6. The fall-preventing drop-out fuse as claimed in claim 1, wherein the lower mounting frame (3) is provided with an ejection plate (18) for ejecting the fuse tube (4), the rotating shaft (13) is provided with a driving protrusion (19), one end of the ejection plate (18) is fixedly connected with the lower mounting frame (3), and the other end of the ejection plate (18) is tightly attached to the driving protrusion (19) of the rotating shaft (13).

7. A fall arrest drop out fuse according to claim 1, characterised in that the top of the fuse tube (4) is provided with an operating ring (20) which pulls the fuse tube (4).

8. A safety drop fuse as claimed in claim 1, characterised in that the insulator (1) is provided with a mounting bracket (21) for securing it.

Technical Field

The invention relates to the technical field of distribution protection auxiliary devices, in particular to a falling-preventing type fuse protector.

Background

The drop-out fuse is the most commonly used short-circuit protection switch for 10kV distribution line branch lines and distribution transformers, has the characteristics of economy, convenient operation, strong adaptability to outdoor environment and the like, is widely applied to the primary side of the 10kV distribution line and distribution transformers for protection and equipment switching and cutting operation, movable contacts at two ends of a fuse tube are tied by a fuse wire (melt), after the upper movable contact is pushed into a 'duckbill' protruding part, an upper static contact made of phosphor copper sheets and the like is propped against the upper movable contact, and therefore the fuse tube is firmly clamped in the 'duckbill'. When the short-circuit current is fused through the fuse wire, an electric arc is generated, a steel paper tube lined in the fuse tube generates a large amount of gas under the action of the electric arc, the gas is sealed due to the upper end of the fuse tube, and the gas is sprayed out to the lower end to blow out the electric arc. The fuse tube falls rapidly under the action of the gravity of the fuse tube and the spring pieces of the upper and lower static contacts, so that a circuit is disconnected, and a fault section circuit or fault equipment is cut off.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the anti-falling fuse which ensures that the fuse tube can reliably fall off after being fused without falling off and falling to the ground, thereby preventing the fuse tube from being damaged and being incapable of recovering equipment or electric power in time and improving the practicability.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an anti-falling drop-out fuse comprises an insulator, an upper mounting frame, a lower mounting frame and a fuse tube, wherein the upper mounting frame and the lower mounting frame are respectively mounted at the top and the bottom of the insulator; still include spring leaf and fixing bolt, be provided with the arc guide way down on the mounting bracket to be provided with spacing arch in the bottom of arc guide way, install the pivot down on the movable contact, the pivot is rotatable to be set up in the arc guide way, the spring leaf passes through fixing bolt fixed mounting is on the top of mounting bracket down, and the spring leaf is "U" type structure, and preforming and back preforming before the front side and the rear side of spring leaf left end are provided with respectively, preceding preforming and the integrative stamping forming of back preforming and spring leaf, preceding preforming and back preforming lie in the front side and the rear side of mounting bracket down respectively to preceding preforming and back preforming lie in the front side and the rear side of arc guide way respectively.

Preferably, the cross section of the upper mounting frame is of an inverted U-shaped structure, and the upper static contact is located in the inverted U-shaped structure of the upper mounting frame.

Preferably, the bottom end of the upper mounting frame is provided with a U-shaped limiting frame for limiting the fuse tube.

Preferably, the upper mounting frame and the lower mounting frame are both provided with wiring terminals, and the two groups of wiring terminals are respectively and electrically connected with the upper static contact and the lower static contact.

Preferably, spring leaf, preceding preforming and back preforming are stainless steel, preceding preforming and back preforming all downward sloping setting.

Preferably, be provided with the pop-up plate that is used for popping out the fuse tube down on the mounting bracket, it is protruding to be provided with the drive in the pivot, the one end and the lower mounting bracket fixed connection of pop-up plate, the other end of pop-up plate pastes tightly with the drive arch of pivot.

Preferably, the top of the fuse tube is provided with an operating ring for pulling the fuse tube.

Preferably, the insulator is provided with a fixing frame for fixing the insulator.

(III) advantageous effects

Compared with the prior art, the invention provides the anti-falling type fuse which has the following beneficial effects: this prevent falling type fuse, install the fuse tube at last mounting bracket under and between the mounting bracket after, install the spring leaf on mounting bracket down through fixing bolt, arc guide way on will mounting bracket covers down through preceding preforming and back preforming, thereby can carry on spacingly to the countershaft, after taking place short circuit fuse tube fusing, the fuse tube disconnection rotates along the pivot, form the open circuit, can carry on spacingly to the countershaft through preceding preforming and back preforming, the condition that takes place to drop after preventing the fuse from falling at the effect of strong wind back and forth swing, guarantee the fuse tube fusing reliably fall and do not take place to drop the condition of falling ground, thereby prevent that the fuse tube from damaging and the unable condition of recovering equipment or electric power in time, and the improvement practicality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A of the present invention;

FIG. 3 is a schematic perspective view of the spring plate, the front wafer and the rear wafer of the present invention;

FIG. 4 is a schematic perspective view of the lower mount of the present invention;

in the drawings, the reference numbers: 1. an insulator; 2. mounting a frame; 3. a lower mounting frame; 4. a fuse tube; 5. an upper static contact; 6. a lower static contact; 7. an upper moving contact; 8. a lower moving contact; 9. a spring plate; 10. fixing the bolt; 11. an arc-shaped guide groove; 12. a limiting bulge; 13. a rotating shaft; 14. pre-tabletting; 15. tabletting; 16. a U-shaped limiting frame; 17. a wiring terminal; 18. ejecting the plate; 19. driving the protrusion; 20. an operating ring; 21. a fixing frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the drop-out fuse for preventing falling of the ground of the invention comprises an insulator 1, an upper mounting frame 2, a lower mounting frame 3 and a fuse tube 4, wherein the upper mounting frame 2 and the lower mounting frame 3 are respectively mounted at the top and the bottom of the insulator 1, the upper mounting frame 2 and the lower mounting frame 3 are respectively provided with an upper static contact 5 and a lower static contact 6, the fuse tube 4 is mounted between the upper mounting frame 2 and the lower mounting frame 3, the bottom of the fuse tube 4 is rotatably connected with the lower mounting frame 3, the top and the bottom of the fuse tube 4 are respectively provided with an upper movable contact 7 and a lower movable contact 8, and the upper movable contact 7 and the lower movable contact 8 are respectively electrically connected with the upper static contact 5 and the; the fuse tube fixing device further comprises a spring piece 9 and a fixing bolt 10, an arc-shaped guide groove 11 is arranged on the lower mounting frame 3, a limiting protrusion 12 is arranged at the bottom of the arc-shaped guide groove 11, a rotating shaft 13 is arranged on the lower moving contact 8, the rotating shaft 13 is rotatably arranged in the arc-shaped guide groove 11 and is clamped in the rotating shaft 13 of the fuse tube 4 along the arc-shaped guide groove 11, the limiting protrusion 12 can limit the rotating shaft 13 to prevent the fuse tube 4 from sliding out along the arc-shaped guide groove 11 when falling off, an ejection plate 18 for ejecting the fuse tube 4 is arranged on the lower mounting frame 3, a driving protrusion 19 is arranged on the rotating shaft 13, one end of the ejection plate 18 is fixedly connected with the lower mounting frame 3, the other end of the ejection plate 18 is tightly attached to the driving protrusion 19 of the rotating shaft 13, when the fuse tube 4 is mounted, the driving protrusion 19 on the rotating shaft 13 extrudes the ejection plate 18 to enable the ejection plate 18 to be in a stressed state, when the tying force, the ejection plate 18 resets and pushes the driving protrusion 19 of the rotating shaft 13, so that the fuse tube 4 can fall conveniently, the spring piece 9 is fixedly installed at the top end of the lower installation frame 3 through the fixing bolt 10, the spring piece 9 is of a U-shaped structure and is just matched with the top of the lower installation frame 3, the front side and the rear side of the left end of the spring piece 9 are respectively provided with a front pressing piece 14 and a rear pressing piece 15, the front pressing piece 14, the rear pressing piece 15 and the spring piece 9 are integrally formed in a punching mode, the front pressing piece 14 and the rear pressing piece 15 are respectively located at the front side and the rear side of the lower installation frame 3, the front pressing piece 14 and the rear pressing piece 15 are respectively located at the front side and the rear side of the arc-shaped guide groove 11, the notch of the arc-shaped guide groove 11 is covered by the front pressing piece 14 and the rear pressing piece 15, the rotating shaft 13 is prevented from being separated from the notch of the arc-shaped guide groove 11, the cross section, go up mounting bracket 2 and be stainless steel, can hide rain to last moving contact 7 and last static contact 5, it installs the spacing frame 16 of "U" type that carries on spacingly to fuse tube 4 to go up the bottom of mounting bracket 2, can carry on spacingly to fuse tube 4 through "U" type spacing frame 16, it all installs binding post 17 on mounting bracket 2 and the lower mounting bracket 3 to go up, the overhead line terminal is used for connecting the high-tension line, two sets of binding post 17 are connected with last static contact 5 and lower static contact 6 electricity respectively, spring leaf 9, preceding preforming 14 and back preforming 15 are stainless steel, preceding preforming 14 and the equal downward sloping setting of back preforming 15, it can cover the notch of arc guide way 11 with pressing the back piece to guarantee preceding preforming 14, the top of fuse tube 4 is provided with the control ring 20 that carries out the pulling to fuse tube 4, be provided with on the insulator 1 and be used for fixing the mount 21 to it.

When the anti-falling drop-out fuse is used, the fuse tube 4 is arranged between the upper mounting frame 2 and the lower mounting frame 3, the spring piece 9 is arranged on the lower mounting frame 3 through the fixing bolt 10, the arc-shaped guide groove 11 on the lower mounting frame 3 is covered through the front pressing piece 14 and the rear pressing piece 15, so that the rotating shaft 13 can be limited, when the short-circuit fuse tube 4 is fused, the fuse tube 4 is disconnected and rotates along the rotating shaft 13 to form an open circuit, the rotating shaft 13 can be limited through the front pressing piece 14 and the rear pressing piece 15, the fuse is prevented from falling off after falling back and swinging back under the action of strong wind, the fuse tube 4 is ensured to fall reliably without falling off and falling down, pedestrians are prevented from being injured by falling down, the fuse tube 4 is prevented from being damaged and cannot recover equipment or electric power in time, and the practicability is improved, the condition that fuse tube 4 falls to the ground can effectively be avoided through simple spring leaf 9, preceding preforming 14 and back preforming 15, conveniently reforms transform the installation to current fuse, goes up mounting bracket 2 and is stainless steel, can hide rain to last moving contact 7 and last static contact 5.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.