阅读说明：本技术 一种大电流熔断并自修复的高压配电熔断器 (High-voltage distribution fuse with high current fusing and self-repairing functions ) 是由 周永刚 于 2020-11-04 设计创作，主要内容包括：本发明公开了一种大电流熔断并自修复的高压配电熔断器,涉及配电设备技术领域,包括熔丝管、第一安装头、第二安装头、熔丝安装架、第一连接端子和第二连接端子。本发明中利用熔断时产生的压力推动下直接旋转式更换熔体,实现主动式修复,可有效保证修复后熔断器的熔断效果,再次凝结的金属钠在使用之前均经过多次补充处理,可有效对金属钠内部孔洞或表面凹凸不同状况进行修复处理,可有效加强冷却降温固化金属钠的质量分布均匀程度,进一步加强后期熔断效果,可通过穿过熔丝管的颜色对熔断器是否正常熔断或已经进行自修复的状态进行判断,可对限位套筒与熔丝管内壁进行双重密封处理,避免氦气泄露,保证充足的推动力。(The invention discloses a high-voltage distribution fuse with high-current fusing and self-repairing functions, and relates to the technical field of distribution equipment. According to the invention, the melt is directly and rotatably replaced under the pushing of the pressure generated during fusing, active repair is realized, the fusing effect of the repaired fuse can be effectively ensured, the recondensed sodium metal is subjected to multiple times of supplementary treatment before use, different conditions of holes in the sodium metal or concave-convex surfaces of the sodium metal can be effectively repaired, the uniformity of the mass distribution of the cooling solidified sodium metal can be effectively enhanced, the later fusing effect is further enhanced, whether the fuse is normally fused or is subjected to self-repairing state can be judged by the color of the fuse tube, the helium gas can be subjected to double sealing treatment on the inner wall of the limiting sleeve and the fuse tube, the helium gas leakage is avoided, and the sufficient pushing force is ensured.)

1. The utility model provides a high voltage distribution fuse of heavy current fusing and selfreparing, includes fuse tube (1), its characterized in that: fuse tube (1) outer wall one end is equipped with first installation head (2), the fuse tube (1) outer wall other end is equipped with second installation head (3), the inside fuse mounting bracket (4) that are equipped with swing joint of fuse tube (1), first installation head (2) surface runs through and is equipped with first connecting terminal (5), second installation head (3) surface runs through and is equipped with second connecting terminal (6), first connecting terminal (5) with second connecting terminal (6) equally divide do not with fuse mounting bracket (4) both ends contact is connected.

2. The high-voltage power distribution fuse which is fused and self-repaired by large current as claimed in claim 1, wherein: the fuse mounting rack (4) comprises an insulating sleeve (7), a first cavity (8) is arranged inside the insulating sleeve (7), a second cavity (9) is arranged between the insulating sleeve (7) and the fuse tube (1), a plurality of mounting holes (10) are formed in the surface of the insulating sleeve (7) between the first cavity (8) and the second cavity (9), helium is filled inside the first cavity (8) and the second cavity (9) and penetrates through one mounting hole (10), sodium strips (21) are arranged inside the rest mounting holes (10), a first through groove (11) is formed in one side, close to the first cavity (8), of the outer wall of each mounting hole (10), a semi-spherical groove (12) is formed in one end, far away from the mounting hole (10), of the outer wall of each first through groove (11), and the semi-spherical grooves (12) are communicated with the first cavity (8), mounting hole (10) outer wall is close to second cavity (9) one side is equipped with the second and leads to groove (13), the second lead to groove (13) with second cavity (9) link up, insulating sleeve (7) outer wall in second leads to groove (13) one side and is equipped with and shifts frame (14), it locates to shift frame (14) inside second cavity (9), mounting hole (10) with it does not be the annular setting up in to shift frame (14) equally divide in insulating sleeve (7) outer wall.

3. The high-voltage power distribution fuse capable of being fused and self-repaired by large current as claimed in claim 2, wherein: the length of the first through groove (11) is smaller than that of the second through groove (13), and the inner diameter of the semi-spherical groove (12) is larger than that of the first through groove (11).

4. The high-voltage power distribution fuse capable of being fused and self-repaired by large current as claimed in claim 2, wherein: the two ends of the mounting hole (10) are symmetrically provided with connectors (20), and the sodium strip (21) is arranged between the connectors (20).

5. The high-voltage power distribution fuse capable of being fused and self-repaired by large current as claimed in claim 2, wherein: the second through groove (13) is of an arc-shaped structure, and the opening of the second through groove (13) faces the pushing frame (14) close to one side of the mounting hole (10).

6. The high-voltage power distribution fuse capable of being fused and self-repaired by large current as claimed in claim 2, wherein: and an arc extinguishing sleeve (15) is arranged on the inner wall of the insulating sleeve (7) and on the inner wall of the mounting hole (10).

7. The high-voltage power distribution fuse capable of being fused and self-repaired by large current as claimed in claim 2, wherein: push away and move frame (14) including stop sleeve (16), stop sleeve (16) outer wall is close to second leads to groove (13) one side and is equipped with air inlet (17), stop sleeve (16) outer wall is kept away from first cavity (8) one side is equipped with first sealing strip (18) and second sealing strip (19), first sealing strip (18) are located stop sleeve (16) outer wall is close to air inlet (17) one side, second sealing strip (19) are located stop sleeve (16) outer wall is kept away from air inlet (17) one side.

8. The high-voltage power distribution fuse which is fused and self-repaired by large current as claimed in claim 7, wherein: the cross sections of the first sealing strip (18) and the second sealing strip (19) are equal in size, and the outer diameter of the cross section of the first sealing strip (18) is smaller than the inner diameter of the cross section of the limiting sleeve (16).

9. The high-voltage power distribution fuse which is fused and self-repaired by large current as claimed in claim 7, wherein: the lengths of the first sealing strip (18) and the second sealing strip (19) are equal, and the length of the first sealing strip (18) is larger than that of the limiting sleeve (16).

10. The high-voltage power distribution fuse which is fused and self-repaired by large current as claimed in claim 7, wherein: the volume between two adjacent limiting sleeves (16) is smaller than that of the mounting hole (10).

Technical Field

The invention relates to the technical field of power distribution equipment, in particular to a high-voltage distribution fuse which is fused by heavy current and self-repaired.

Background

Fuses are the simplest protective electrical devices that are used to protect electrical equipment from overload and short circuit currents; for some special equipment, a special series should be selected for the high-voltage fuse. 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. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector. At present, a self-resetting fuse exists, and the fuse can be automatically repaired by using metal sodium as a melt.

Current high-voltage power distribution fuse of heavy current fusing and selfreparing can only rely on and just can realize repairing after the cooling solidification of metallic sodium, mainly for passive form restores, and the repairing effect is relatively poor, and later stage fusing function mainly relies on the metallic sodium of cooling solidification, but the metallic sodium mass distribution of cooling solidification is not enough even, and later stage fusing effect is not good.

Disclosure of Invention

The invention aims to provide a high-voltage distribution fuse which is fused by high current and self-repaired, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a high-voltage distribution fuse of heavy current fusing and selfreparing, includes the fuse tube, fuse tube outer wall one end is equipped with first installation head, the fuse tube outer wall other end is equipped with the second installation head, the inside fuse mounting bracket that is equipped with swing joint of fuse tube, first installation head surface runs through and is equipped with first connecting terminal, second installation head surface runs through and is equipped with second connecting terminal, first connecting terminal with second connecting terminal equally divide do not with fuse mounting bracket both ends contact is connected.

Further, the fuse mounting frame comprises an insulating sleeve, a first cavity is arranged in the insulating sleeve, a second cavity is arranged between the insulating sleeve and the fuse tube, a plurality of mounting holes are formed in the surface of the insulating sleeve between the first cavity and the second cavity, helium is filled in the first cavity and the second cavity, the helium penetrates through one mounting hole, sodium strips are arranged in the rest mounting holes, a first through groove is formed in the outer wall of each mounting hole, which is close to one side of the first cavity, a hemispherical groove is formed in one end, which is far away from the mounting hole, of the outer wall of each first through groove, the hemispherical groove is communicated with the first cavity, a second through groove is formed in one side, which is close to the second cavity, of the outer wall of each mounting hole, the second through groove is communicated with the second cavity, and a pushing frame is arranged on one side, which is close to the second through groove, of the outer wall of the insulating sleeve, the pushing frame is arranged in the second cavity, and the mounting hole and the pushing frame are respectively arranged on the outer wall of the insulating sleeve in an annular mode.

Furthermore, the length of the first through groove is smaller than that of the second through groove, so that the path of the first through groove is shorter than that of the second through groove, the high-temperature gasified sodium strip can move to the outer side of the mounting hole along the first through groove more easily, the inner diameter of the hemispherical groove is larger than that of the first through groove, the first through groove and the hemispherical groove are matched to form a horn-shaped structure, and the efficiency of entering the first cavity when the high-temperature gasified sodium strip is discharged outwards along the first through groove is higher.

Furthermore, the two ends of the mounting hole are symmetrically provided with connectors, the sodium strips are arranged between the connectors, the connectors are guaranteed to be subjected to wiring processing at the two ends of the mounting hole, and circuit connection can be achieved when the sodium strips are communicated with the two connectors.

Furthermore, the second through groove is of an arc-shaped structure, the opening of the second through groove faces the pushing frame close to one side of the mounting hole, so that helium flushed from the second through groove can directly impact the pushing frame, and the pushing frame is more sufficient in power.

Further, the insulating bush inner wall in the mounting hole inner wall is equipped with the arc extinguishing cover, and the arc extinguishing cover can carry out the arc extinguishing to the inside sodium strip of mounting hole and handle, avoids the sodium strip to spread outward when carrying electric current, improve equipment security.

Further, the pushing frame comprises a limiting sleeve, the outer wall of the limiting sleeve is close to one side of the second through groove, an air inlet is formed in the side, away from the outer wall of the limiting sleeve, of the first cavity, a first sealing strip and a second sealing strip are arranged on one side of the first cavity, the first sealing strip is arranged on the side, close to the outer wall of the limiting sleeve, of the air inlet, and the second sealing strip is arranged on the side, away from the outer wall of the limiting sleeve, of the air inlet.

Further, first sealing strip with the cross section size of second sealing strip equals, and first sealing strip is the same with the sealed effect of second sealing strip, guarantees to carry out double sealing between spacing sleeve and the fuse tube inner wall and handles, guarantees that the helium can strike the transport to spacing sleeve, the cross section external diameter of first sealing strip is less than spacing sleeve's cross section internal diameter can effectively reduce first sealing strip and second sealing strip to spacing sleeve's burden, guarantees that first sealing strip and second sealing strip can be along with spacing sleeve guarantee sealing performance when moving.

Further, first sealing strip with the length of second sealing strip equals, and first sealing strip is the same with the sealed effect of second sealing strip, guarantees to carry out double sealing between spacing sleeve and the fuse tube inner wall and handles, the length of first sealing strip is greater than spacing sleeve's length guarantees that first sealing strip and second sealing strip can carry out comprehensive sealing to spacing sleeve and handles, avoids the helium to reveal from spacing sleeve's both ends, improves sealing performance.

Furthermore, the volume between two adjacent limiting sleeves is smaller than that of the mounting hole, so that the volume of a sodium strip inside the mounting hole is larger than that between the two adjacent limiting sleeves, the expansion amount of the sodium strip is larger when abnormal large current is introduced into the sodium strip and the sodium strip is gasified at high temperature, helium larger than the volume between the two limiting sleeves can be impacted into the second cavity, and the limiting sleeves can be moved to the position of one adjacent limiting sleeve.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention is provided with a fuse tube, a fuse wire mounting rack, an insulating sleeve, a first cavity, a mounting hole, a first through groove, a semi-spherical groove, a second through groove, a pushing frame and a sodium strip, wherein the sodium strip is changed into plasma steam in a high-temperature and high-pressure state from a solid when being fused, the resistivity is rapidly increased, so that a strong current limiting effect is realized on high-voltage current, the current is instantly broken, a large amount of pressure is generated in the process that the sodium strip is changed into the plasma steam in the high-temperature and high-pressure state, helium conveyed from the second through groove directly impacts the pushing frame, the rotation adjustment of the insulating sleeve is realized, the melt is directly and rotatably replaced under the pushing of the pressure generated when being fused, active repair is realized, the fusing effect of the repaired fuse can be effectively ensured, and simultaneously, sodium is condensed in the mounting hole where the helium is introduced before after the plasma steam in the high-temperature and, the annular metal sodium continuously rotates in the self-repairing process, the metal sodium is gasified, liquefied and condensed in the fusing process, the re-condensed metal sodium is subjected to multiple supplementary treatments before use, different conditions of holes in the metal sodium or concave-convex surfaces of the metal sodium can be effectively repaired, the uniformity of the mass distribution of the cooling solidified metal sodium can be effectively enhanced, the later fusing effect is further enhanced, the helium emits pink light when in a normal power-on state, the helium is in a colorless state when in a fusing state, and the state of whether the fuse is normally fused or has been subjected to self-repairing can be judged by the color of the fuse tube;

2. according to the invention, by arranging the limiting sleeve, the air inlet, the first sealing strip and the second sealing strip, helium performs rotary impact along the limiting sleeve, so that the driving force on the pushing frame can be enhanced, the rotary displacement of the insulating sleeve is ensured to be enough for replacing the displacement of a melt, double sealing treatment can be performed on the limiting sleeve and the inner wall of the fuse tube, helium leakage is avoided, and the sufficient driving force is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front view of the present invention in its entirety;

FIG. 2 is a front sectional view of the present invention as a whole;

FIG. 3 is an enlarged schematic view at A of FIG. 2 of the present invention;

FIG. 4 is an enlarged schematic view of the invention at B of FIG. 2;

FIG. 5 is a side view of the fuse mount of the present invention;

FIG. 6 is a side sectional view of the fuse mount and fuse tube of the present invention;

FIG. 7 is an enlarged schematic view of the invention at C of FIG. 6;

FIG. 8 is an enlarged schematic view of the invention at D in FIG. 6;

in the figure: 1. a fuse tube; 2. a first mounting head; 3. a second mounting head; 4. a fuse mounting bracket; 5. a first connection terminal; 6. a second connection terminal; 7. an insulating sleeve; 8. a first cavity; 9. a second cavity; 10. mounting holes; 11. a first through groove; 12. a hemispherical groove; 13. a second through groove; 14. a pushing frame; 15. an arc extinguishing sleeve; 16. a limiting sleeve; 17. an air inlet; 18. a first seal strip; 19. a second seal strip; 20. a connector; 21. sodium strips.

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.

As shown in fig. 1-3 and fig. 5-7, the high-voltage distribution fuse with high current fusing and self-repairing function comprises a fuse tube 1, a first mounting head 2 is arranged at one end of the outer wall of the fuse tube 1, a second mounting head 3 is arranged at the other end of the outer wall of the fuse tube 1, a movably connected fuse mounting frame 4 is arranged inside the fuse tube 1, a first connecting terminal 5 is arranged on the surface of the first mounting head 2 in a penetrating manner, a second connecting terminal 6 is arranged on the surface of the second mounting head 3 in a penetrating manner, the first connecting terminal 5 and the second connecting terminal 6 are respectively in contact connection with two ends of the fuse mounting frame 4, the fuse mounting frame 4 comprises an insulating sleeve 7, a first cavity 8 is arranged inside the insulating sleeve 7, a second cavity 9 is arranged between the insulating sleeve 7 and the fuse tube 1, a plurality of mounting holes 10 are arranged on the surface of the insulating sleeve 7 between the first cavity 8 and the second cavity 9, first cavity 8 with the inside helium that all is filled of second cavity 9, the helium runs through one mounting hole 10, the surplus the inside sodium strip 21 that all is equipped with of mounting hole 10, the mounting hole 10 outer wall is close to 8 one side of first cavity is equipped with first logical groove 11, first logical groove 11 outer wall is kept away from 10 one end of mounting hole is equipped with hemisphere groove 12, hemisphere groove 12 with first cavity 8 link up, 10 outer walls of mounting hole are close to 9 one side of second cavity is equipped with second through groove 13, second through groove 13 with second cavity 9 link up, 7 outer walls of insulating sleeve in 13 one side of second through groove is equipped with and pushes away frame 14, it locates to push away frame 14 inside second cavity 9, mounting hole 10 with it does not divide equally to push away frame 14 and do not be the annular set up in on 7 outer walls of insulating sleeve.

The length of the first through groove 11 is smaller than that of the second through groove 13, so that the path of the first through groove 11 is shorter than that of the second through groove 13, the high-temperature gasified sodium strip 21 can move to the outer side of the mounting hole 10 along the first through groove 11 more easily, the inner diameter of the hemispherical groove 12 is larger than that of the first through groove 11, the first through groove 11 and the hemispherical groove 12 are matched to form a horn-shaped structure, and the efficiency of entering the first cavity 8 when the high-temperature gasified sodium strip 21 is discharged outwards along the first through groove 11 is higher.

Connectors 20 are symmetrically arranged at two ends of the mounting hole 10, the sodium strips 21 are arranged between the connectors 20, wiring processing of the connectors 20 at two ends of the mounting hole 10 is guaranteed, and circuit connection can be achieved when the sodium strips 21 are communicated with the two connectors 20.

The second through groove 13 is of an arc-shaped structure, the opening of the second through groove 13 faces the pushing frame 14 close to one side of the mounting hole 10, helium rushing out of the second through groove 13 can directly impact the pushing frame 14, and the pushing frame 14 is more powerful.

Insulating sleeve 7 inner wall in the mounting hole 10 inner wall is equipped with arc extinguishing sleeve 15, and arc extinguishing sleeve 15 can carry out the arc extinguishing to the inside sodium strip 21 of mounting hole 10 and handle, avoids sodium strip 21 to spread outward when carrying electric current, improve equipment security.

The implementation mode is specifically as follows: when the high-voltage high-current fuse protector is used, the fuse tube 1, the fuse mounting frame 4, the insulating sleeve 7, the first cavity 8, the mounting hole 10, the first through groove 11, the hemispherical groove 12, the second through groove 13, the pushing frame 14 and the sodium bar 21 are arranged, the first mounting head 2 and the second mounting head 3 are respectively mounted and supported at two ends of the fuse tube 1, the fuse mounting frame 4 is movably mounted inside the fuse tube 1, the first connecting terminal 5 and the second connecting terminal 6 can be in contact connection with one sodium bar 21 on the fuse mounting frame 4, high-current fusing protection is realized, when high-voltage high current passes through the fuse, short-circuit current rapidly heats the sodium bar 21 in a circuit, the sodium bar 21 is changed into plasma steam in a high-temperature and high-voltage state from a solid, the resistivity is rapidly increased, so that a strong current limiting effect is achieved on high-voltage current, and a large amount of pressure can be generated by the sodium bar 21 in the process of changing into the plasma, the sodium is discharged from the mounting hole 10 of the mounting position through the first through groove 11 and the hemispherical groove 12 in the high-temperature high-pressure state, the sodium enters the first cavity 8 from the plasma vapor of the high-temperature high-pressure state, the molecular weight of the helium is smaller than that of the sodium, the helium in the first cavity 8 can be extruded outwards by the sodium in the high-temperature high-pressure state, the helium enters the mounting hole 10 without the sodium strip 21 from the hemispherical groove 12 and the first through groove 11, then the helium is extruded into the second cavity 9 from the inner side of the mounting hole 10 through the second through groove 13, the helium conveyed from the second through groove 13 directly impacts the pushing frame 14, the space pressure between the two pushing frames 4 positioned at the two sides of the mounting hole 10 is gradually increased, a rotary driving force is generated between the two pushing frames 4, and the pushing frame 14 can be driven to rotate along the fuse tube 1, further realize the rotation regulation to insulating sleeve 7, the impact force that pushing frame 4 near carrying helium second through groove 13 received is bigger for insulating sleeve 7's direction of rotation uses two pushing frames 14 that receive the helium impact as the reference: rotating from the pushing frame 14 far away from the helium conveying second through groove 13 to the other pushing frame 14; when the fuse is used, the plurality of sodium strips 21 rotate along with the insulating sleeve 7, the unused sodium strips 21 can directly rotate to the positions of the fused and gasified sodium strips 21, the self-repairing work of the fuse is realized, the other mounting hole 10 provided with the sodium strips 21 is aligned with the first connecting terminal 5 and the second connecting terminal 6 and is in contact and abutted connection, the automatic replacement of a melt in the fuse can be realized, the automatic repair of the fuse is realized, the melt is directly and rotatably replaced under the pushing of the pressure generated during fusing, the active repair is realized, the fusing effect of the repaired fuse can be effectively ensured, meanwhile, sodium is gradually cooled by plasma steam in a high-temperature and high-pressure state and is condensed in the mounting hole 10 which is introduced with helium, the mounting hole 10 originally provided with the sodium strips 21 is evaporated into a cavity after high-temperature heating treatment, and meanwhile, a conveying channel is provided for the helium after next high-current fusing, in the self-repairing process of the device, the rotary adjustment of the insulating sleeve 7 can be realized, the metal sodium in annular distribution continuously performs rotary motion in the self-repairing process, the metal sodium is gasified, liquefied and condensed in the fusing process, the metal sodium after fusing and gasifying is continuously supplemented for the metal sodium before fusing, gasifying, liquefying and condensing, when the metal sodium which is initially gasified, liquefied and condensed in the device rotates and moves to the initial circuit connecting position, the metal sodium in the device has completely undergone the gasification, liquefaction and condensation processes, the metal sodium which is condensed again is supplemented for many times before use, different conditions of holes in the metal sodium or concave-convex surfaces of the metal sodium can be effectively repaired, the uniform degree of mass distribution of the cooling and solidifying metal sodium can be effectively enhanced, the later fusing effect can be further enhanced, and meanwhile, when the helium is in a normal power-on state, helium is in contact with the normal power-on sodium strip 21 and is matched with the fuse tube 1, so that the sodium strip 21 is positioned in the discharge tube, the helium fills the space of the fuse mounting rack 4, the helium can realize the rotary pushing of the fuse mounting rack 4 through the helium after the gasification volume expansion of the metal sodium, the power is ensured, the helium can emit pink light in the normal power-on state, when the helium is in the fusing state, the helium is in the colorless state, and the state that whether the fuse is normally fused or has been self-repaired can be judged through the color penetrating through the fuse tube 1; this embodiment has specifically solved the high voltage distribution fuse of current heavy current fusing and selfreparing among the background art, can only rely on the cooling solidification of metallic sodium after just can realize repairing, mainly for passive form restoration, the repairing effect is relatively poor, and later stage fusing function mainly relies on the metallic sodium of cooling solidification, but the metallic sodium mass distribution of cooling solidification is not enough even, the not good problem of later stage fusing effect.

The high-voltage distribution fuse which is fused and self-repaired by large current as shown in the attached fig. 2, the attached fig. 4, the attached fig. 5-6 and the attached fig. 8, wherein the pushing frame 14 comprises a limiting sleeve 16, an air inlet 17 is arranged on one side of the outer wall of the limiting sleeve 16 close to the second through groove 13, a first sealing strip 18 and a second sealing strip 19 are arranged on one side of the outer wall of the limiting sleeve which is far away from the first cavity 8, the first sealing strip 18 is arranged on one side of the outer wall of the limiting sleeve which is close to the air inlet 17, and the second sealing strip 19 is arranged on one side of the outer wall of the limiting sleeve 16.

First sealing strip 18 with second sealing strip 19's cross section size equals, and first sealing strip 18 is the same with the sealed effect of second sealing strip 19, guarantees to carry out double sealing between limiting sleeve 16 and the 1 inner wall of fuse tube and handles, guarantees that the helium can strike limiting sleeve 16 and carry, first sealing strip 18's cross section external diameter is less than limiting sleeve 16's cross section internal diameter can effectively reduce first sealing strip 18 and second sealing strip 19 to limiting sleeve 16's burden, guarantees that first sealing strip 18 and second sealing strip 19 can be along with limiting sleeve 16 guarantee sealing performance when moving.

First sealing strip 18 with second sealing strip 19's length equals, and first sealing strip 18 is the same with the sealed effect of second sealing strip 19, guarantees to carry out double sealing between limiting sleeve 16 and 1 inner wall of fuse tube and handles, first sealing strip 18's length is greater than limiting sleeve 16's length guarantees that first sealing strip 18 and second sealing strip 19 can carry out comprehensive sealing to limiting sleeve 16 and handles, avoids the helium to reveal from limiting sleeve 16's both ends, improves sealing performance.

The volume between two adjacent limiting sleeves 16 is smaller than the volume of the mounting hole 10, so that the volume of the sodium strip 21 in the mounting hole 10 is larger than the volume between the two adjacent limiting sleeves 16, the expansion amount of the sodium strip 21 is larger when abnormal large current is introduced into the sodium strip and the sodium strip is gasified at high temperature, helium gas larger than the volume between the two limiting sleeves 16 can be impacted into the second cavity 9, and the limiting sleeves 16 can be enabled to be shifted to the position of one adjacent limiting sleeve 16.

The implementation mode is specifically as follows: during the use, through setting up limit sleeve 16, the air inlet 17, first sealing strip 18 and second sealing strip 19, limit sleeve 16 is used for spacing sheltering from the helium, the helium that comes from second through groove 13 is direct to be spouted into limit sleeve 16 inboard from air inlet 17, then circle round backward along limit sleeve 16, the impact of circling round to limit sleeve 16, can strengthen the driving force to pushing away frame 14, guarantee the enough displacement of changing the fuse-element of the rotatory displacement volume of insulating sleeve 7, first sealing strip 18 carries out first resealing to limit sleeve 16 and fuse tube 1 inner wall, second sealing strip 19 can carry out second resealing to limit sleeve 16 and fuse tube 1 inner wall, can effectively guarantee that the helium only carries out pressure shock between the frame 14 of pushing away of the mounting hole 10 both sides that keeps the passageway, avoid the helium to leak, guarantee sufficient driving force.

The working principle of the invention is as follows:

referring to the attached drawings 1-3 and 5-7 of the specification, by arranging the fuse tube 1, the fuse mounting frame 4, the insulating sleeve 7, the first cavity 8, the mounting hole 10, the first through groove 11, the hemispherical groove 12, the second through groove 13, the pushing frame 14 and the sodium strip 21, when the sodium strip 21 is fused, a solid is changed into plasma steam in a high-temperature and high-pressure state, the resistivity is rapidly increased, so that a strong current limiting effect is exerted on high-voltage current, and when the current is instantaneously broken, a large amount of pressure is generated in the process that the sodium strip 21 is changed into the plasma steam in the high-temperature and high-pressure state, helium conveyed from the second through groove 13 directly impacts the pushing frame 14, the rotary adjustment of the insulating sleeve 7 is realized, the melt is directly and rotatably replaced under the pushing of the pressure generated when the fuse is fused, the active repair is realized, and the fusing effect of the repaired fuse can be, meanwhile, sodium is gradually cooled in a high-temperature and high-pressure state, then is condensed in the installation hole 10 filled with helium, in the self-repairing process of the device, the rotation adjustment of the insulating sleeve 7 can be realized, the metal sodium distributed in an annular shape continuously rotates in the self-repairing process, the metal sodium is gasified, liquefied and condensed in the fusing process, the metal sodium gasified in the rear side continuously performs the supplement treatment on the metal sodium which is fused, gasified, liquefied and condensed in the front side, when the metal sodium which is originally gasified, liquefied and condensed in the device rotates and moves to the original circuit connecting position, the metal sodium in the device is completely subjected to the gasification, liquefaction and condensation processes, the metal sodium which is condensed again is subjected to the supplement treatment for multiple times before use, the repairing treatment on different conditions of holes in the metal sodium or concave-convex surfaces can be effectively carried out, and the uniform degree of mass distribution of the cooled and solidified metal sodium can be effectively enhanced, further strengthening the later stage fusing effect, the helium gas emits pink light when in a normal power-on state, the helium gas is in a colorless state when in a fusing state, and whether the fuse is normally fused or is in a self-repairing state can be judged by the color of the helium gas penetrating through the fuse tube 1;

further, referring to the attached drawings 2, 4, 5-6 and 8 in the specification, helium revolves along the limiting sleeve 16 to impact through the arrangement of the limiting sleeve 16, the air inlet 17, the first sealing strip 18 and the second sealing strip 19, so that the pushing force on the pushing frame 14 can be enhanced, the displacement of the melt can be sufficiently replaced due to the rotation displacement of the insulating sleeve 7, double sealing treatment can be performed on the inner wall of the limiting sleeve 16 and the inner wall of the fuse tube 1, helium leakage is avoided, and the sufficient pushing force is ensured.

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.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.