CN114899061A - Multi-stage fuse with high breaking capacity - Google Patents
Multi-stage fuse with high breaking capacity Download PDFInfo
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- CN114899061A CN114899061A CN202210533986.3A CN202210533986A CN114899061A CN 114899061 A CN114899061 A CN 114899061A CN 202210533986 A CN202210533986 A CN 202210533986A CN 114899061 A CN114899061 A CN 114899061A
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- groove
- fuse
- fusing
- pistons
- breaking capacity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/165—Casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/22—Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse
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- Fuses (AREA)
Abstract
The invention relates to the field of fuses and discloses a multi-stage fuse with high breaking capacity, which comprises a shell, wherein the top of an inner cavity of the shell is respectively provided with a standby through groove and a fusing through groove, the middle part of the inner cavity of the shell is provided with a middle through groove for connecting the standby through groove and the fusing through groove, two lower pistons are movably sleeved in the fusing through groove and are respectively positioned on two sides of the middle through groove, and a melt is arranged between the two lower pistons. Set up logical groove and fuse through communicating with each other through seting up in the casing, and reserve logical groove and fuse lead to the inslot and all pack and be used for the arc extinguishing with quartz sand, quartz sand between two next pistons is used for carrying out the arc extinguishing when fusing to the fuse-element, produce a large amount of heats when the fuse-element is fusing, can promote two next pistons and keep away from each other and remove and compression spring, reserve logical inslot quartz sand of leading to the inslot supplements the logical inslot of fuse through the middle logical groove, guarantee arc extinguishing effect, thereby the life of fuse has been improved.
Description
Technical Field
The invention relates to the field of fuses, in particular to a multi-stage fuse with high breaking capacity.
Background
The fuse is a protector for short circuit and overcurrent in circuit, in which the fuse with high breaking capacity is a fuse whose melt body is placed in a porcelain tube (or glass fibre tube) filled with quartz sand, and the quartz sand is used as arc-extinguishing medium, when the overload current or short-circuit current is passed through the fuse, the melt body is fused, and the arc is produced in the tube, and because the quartz sand has strong cooling action and deionization action on the arc, the arc can be quickly extinguished.
However, when the existing high breaking capacity fuse is used, the fuse is filled with the quartz sand to cover the fuse body, and when the fuse body is fused, a large amount of heat is generated, and the fuse body cannot be decompressed due to the fact that the quartz sand is filled in the fuse body, so that the fuse body is broken.
Disclosure of Invention
The invention provides a multi-stage fuse with high breaking capacity, which has the advantage of long service life and solves the technical problems mentioned in the background technology.
In order to realize the purpose, the invention provides the following technical scheme to realize the purpose: a multi-stage fuse with high breaking capacity comprises a shell, wherein the top of an inner cavity of the shell is respectively provided with a standby through groove and a fusing through groove, the middle part of the inner cavity of the shell is provided with a middle through groove for communicating the standby through groove and the fusing through groove, two lower pistons are movably sleeved in the fusing through groove, two lower pistons are respectively positioned at two sides of the middle through groove, a melt is arranged between the two lower pistons, one sides of the two lower pistons are respectively and fixedly connected with a lead, one ends of the two leads respectively extend out of the shell, the outer edges of the opposite sides of the two lower pistons are respectively and fixedly connected with arc-shaped baffles, the opposite sides of the two arc-shaped baffles are movably connected, and the middle through groove of the outside complete shutoff of two cowl, reserve logical groove, fusing are led to and all are filled with quartz sand in the groove, and the both sides that fuse led to the groove are all fixed the cover and are connect the next closing cap.
Optionally, a spring movably sleeved outside the wire is arranged between the lower piston and the lower sealing cover, one end of the spring is fixedly connected with the side surface of the lower piston, the other end of the spring is movably sleeved with the lower sealing cover, and an insulating layer wraps the outer portion of the spring.
Optionally, the inside activity cover in reserve logical groove is equipped with two upper pistons, and two upper pistons are located the both sides of logical groove in the middle respectively, and quartz sand is filled between two upper pistons.
Optionally, upper sealing caps are respectively disposed on two sides of the standby through slot, a first magnetic ring and a second magnetic ring are respectively and fixedly connected to opposite sides of the upper piston and the upper sealing caps, opposite magnetic poles of the first magnetic ring and opposite magnetic poles of the second magnetic ring are opposite, and a pull wire is fixedly connected between the upper piston and the upper sealing caps.
Optionally, the inner side of the lower piston is provided with a wiring terminal, one end of the melt and one end of the wire are sleeved in the wiring terminal, a positioning hole is formed in the middle of the top end of the wiring terminal, and a bolt used for fixing the melt and the wire is sleeved in the positioning hole in a threaded manner.
Optionally, a sealing plug for sealing the lead is disposed outside the lower piston.
Optionally, the length value of the arc-shaped baffle is half of the width value of the middle through groove.
The invention provides a multi-stage fuse with high breaking capacity, which has the following beneficial effects:
1. the multistage fuse with high breaking capacity is characterized in that a standby through groove and a fusing through groove are formed in a shell, a fuse body is arranged in the fusing through groove, two movable lower pistons are matched in the standby through groove, quartz sand is filled in the standby through groove and the fusing through groove for arc extinction, the quartz sand between the two lower pistons is used for arc extinction when the fuse body is fused, a large amount of heat is generated when the fuse body is fused, the air pressure between the two lower pistons is increased, the quartz sand is heated to be expanded to extinguish the arc, the two lower pistons are pushed to move away from each other to compress a spring, the two arc-shaped baffles are separated while the spring is used for buffering, the quartz sand in the standby through groove is supplemented into the fusing through groove through the middle through groove, the fuse body is ensured to be completely covered by the quartz sand all the time when the fuse body is fused, the arc extinction effect is ensured, and the use of the existing fuse with high breaking capacity is avoided, because of being full of the quartz sand in the fuse-link body, lead to unable pressure release for the problem of fuse-link body bursting, thereby improved the life of fuse.
2. This multistage fuse of high breaking capacity, lead to mobilizable upper piston in the inslot through the fusing, after the fuse-element fusing, reserve logical inslot quartz sand falls into fusing and leads to the inslot, under the magnetic repulsion effect of second magnetic ring to first magnetic ring, make two upper pistons remove in opposite directions, two upper pistons continue the propelling movement to fusing and lead to the inslot with reserve logical inslot quartz sand, supplement, guarantee that fusing leads to the inslot and remain the state that is full of quartz sand all the time, and then when fuse-element fusing carries out the pressure release, still ensure that quartz sand covers the fuse-element completely, and then guarantee effectual arc extinguishing effect.
3. This high breaking capacity's multi-stage fuse, when changing the fuse-element, only need to flow back the reserve logical inslot with the quartz sand that the logical inslot of fusing, need not to pour out quartz sand and can change the fuse-element, avoided current fuse when changing the fuse-element, still need change the problem of quartz sand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of FIG. 1 of the present invention;
fig. 3 is a schematic view of the housing structure of the present invention.
In the figure: 1. a housing; 2. a standby through groove; 3. fusing the through groove; 4. a middle through groove; 5. a lower piston; 6. an arc-shaped baffle plate; 7. melting the materials; 8. a wire; 9. an upper sealing cover; 10. a lower sealing cover; 11. a spring; 12. a sealing plug; 13. an upper piston; 14. a first magnetic ring; 15. a second magnetic ring; 16. a pull wire; 17. a wiring terminal; 18. and (7) positioning the holes.
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, a multi-stage fuse with high breaking capacity comprises a housing 1, wherein the top and the bottom of an inner cavity of the housing 1 are respectively provided with a standby through groove 2 and a fusing through groove 3, the middle part of the inner cavity of the housing 1 is provided with a middle through groove 4, the middle through groove 4 is communicated with the standby through groove 2 and the fusing through groove 3, two lower pistons 5 are movably sleeved in the fusing through groove 3, the two lower pistons 5 are positioned at two sides of the middle through groove 4, a fuse body 7 is arranged between the two lower pistons 5, one sides of the two lower pistons 5 are respectively and fixedly connected with a lead wire 8, the two lead wires 8 are respectively and electrically connected with two ends of the fuse body 7, one end of each lead wire 8 respectively extends out of the housing 1, the outer edges of the opposite sides of the two lower pistons 5 are respectively and fixedly connected with arc baffles 6, the opposite sides of the two arc baffles 6 are movably connected, and the outer sides of the two arc baffles 6 completely block the middle through groove 4, the two sides of the fusing through groove 3 are fixedly sleeved with lower sealing covers 10, the lower sealing covers 10 are movably sleeved with a lead 8, a spring 11 movably sleeved on the outer side of the lead 8 is arranged between the lower piston 5 and the lower sealing cover 10, one end of the spring 11 is fixedly connected with the side surface of the lower piston 5, the other end of the spring 11 is movably sleeved with the lower sealing cover 10, an insulating layer is wrapped outside the spring 11 to prevent the spring 11 from being electrically shocked to cause a short circuit problem, two upper pistons 13 are movably sleeved inside the standby through groove 2, the two upper pistons 13 are respectively positioned on the two sides of the middle through groove 4, quartz sand is filled between the two upper pistons 13 and between the two lower pistons 5, wherein the quartz sand between the two lower pistons 5 is used for arc extinction when the fuse 7 is fused, in addition, a large amount of heat is generated when the fuse 7 is fused, the air pressure between the two lower pistons 5 is increased, and quartz sand arc extinguishing is heated the inflation, can promote two next pistons 5 and keep away from each other and remove and compression spring 11, when utilizing spring 11 buffering, two cowl 6 separations, the quartz sand in reserve logical groove 2 supplements into the logical groove 3 of fusing through groove 4 in the middle of, ensure fuse-element 7 when the fusing, be covered completely by quartz sand all the time, guarantee arc extinguishing effect, the fuse of having avoided current high breaking capacity is when using, because of being full of quartz sand in the fuse-element body, lead to unable pressure release, make the problem that the fuse-element body bursts, thereby the life of fuse has been improved.
The inboard of lower piston 5 is equipped with binding post 17, the one end suit of fuse-element 7 and wire 8 is to binding post 17 in, and the locating hole 18 has been seted up at the middle part on binding post 17 top, 18 internal thread covers of locating hole are equipped with the bolt that is used for fixed fuse-element 7 and wire 8, so that fix the one end of fuse-element 7 and wire 8, the outside of lower piston 5 is equipped with carries out sealed sealing plug 12 sealed to wire 8, guarantee the leakproofness between two lower pistons 5, avoid external rainwater infiltration, cause the problem of short circuit.
The length value of cowl 6 is half of the groove width value of middle through groove 4 for two cowl 6 contact backs, lower piston 5 is located the outside that the groove 4 was led to in the middle just, and cowl 6 seals off middle through groove 4 just.
The two sides of the standby through groove 2 are provided with upper sealing covers 9, opposite sides of an upper piston 13 and the upper sealing cover 9 are respectively and fixedly connected with a first magnetic ring 14 and a second magnetic ring 15, magnetic poles of opposite sides of the first magnetic ring 14 and the second magnetic ring 15 are opposite, a pull wire 16 is fixedly connected between the upper piston 13 and the upper sealing cover 9, after the melt 7 is fused, quartz sand in the standby through groove 2 falls into the fusing through groove 3, under the action of magnetic repulsion force of the second magnetic ring 15 on the first magnetic ring 14, the two upper pistons 13 move oppositely, the two upper pistons 13 continuously push the quartz sand in the standby through groove 2 into the fusing through groove 3 for supplementation, the fusing through groove 3 is ensured to be always kept in a state filled with the quartz sand, further, when the melt 7 is fused for pressure relief, the quartz sand is ensured to completely cover the melt 7, and further, the effective arc extinguishing effect is ensured.
When the multi-stage fuse with high breaking capacity is used, after a fuse body 7 is fused, the generated high temperature increases the air pressure between two lower pistons 5 to push the two lower pistons 5 to move separately to relieve pressure, meanwhile, quartz sand in a standby through groove 2 is filled into a fusing through groove 3 through a middle through groove 4 in real time to ensure that the quartz sand completely covers the fuse body 7 all the time, so that effective arc extinction is carried out, the shell 1 is prevented from being damaged, when the fused fuse body 7 needs to be replaced, an upper sealing cover 9 is disassembled and pulled out, an upper piston 13 is pulled to the groove opening of the fusing through groove 3, then the shell 1 is turned over, the quartz sand in the fusing through groove 3 flows back into the standby through groove 2, the quartz sand on the side flows back into the standby through groove 2 in a slow tilting mode by disassembling a lower sealing cover 10 at one end of the fusing through groove 3, and the quartz sand on the other side falls into the standby through groove 2 in a reversely tilted shell 1, finally, the lower sealing cover 10, the spring 11 and the lower piston 5 are pulled out from one side of the fusing through groove 3, a new fuse body 7 is fixed between the two wiring terminals 17, then the two lower pistons 5, the two springs 11 and the fuse body 7 are integrally placed into the fusing through groove 3, the spring 11 is rotated to enable the arc-shaped baffle plate 6 to rotate to the other side of the middle through groove 4, after the shell 1 is turned over, quartz sand in the standby through groove 2 falls back into the fusing through groove 3 again until the space between the two lower pistons 5 is filled with the quartz sand, the spring 11 is rotated to drive the lower pistons 5 and the arc-shaped baffle plate 6, the arc-shaped baffle plate 6 rotates to the middle through groove 4 to plug the middle through groove 4, finally the lower sealing covers 10 are fixed to the two sides of the fusing through groove 3, namely, the quartz sand does not need to be poured out when the fuse body 7 is replaced, the quartz sand can be reused, and the existing fuse body 7 is prevented, and the quartz sand needs to be replaced.
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.
Claims (7)
1. A high breaking capacity multi-stage fuse, comprising a housing (1), characterized in that: the top of the inner cavity of the shell (1) is respectively provided with a standby through groove (2) and a fusing through groove (3), the middle part of the inner cavity of the shell (1) is provided with a middle through groove (4) for connecting the standby through groove (2) and the fusing through groove (3), the fusing through groove (3) is movably sleeved with two lower pistons (5), the two lower pistons (5) are respectively positioned at two sides of the middle through groove (4), a melt (7) is arranged between the two lower pistons (5), one side of each of the two lower pistons (5) is respectively and fixedly connected with a lead (8), one end of each of the two leads (8) respectively extends out of the shell (1), the outer edges of the opposite sides of the two lower pistons (5) are respectively and fixedly connected with arc baffles (6), the opposite sides of the two arc baffles (6) are movably connected, and the middle through groove (4) is completely sealed at the outer sides of the two arc baffles (6), quartz sand is filled in the standby through groove (2) and the fusing through groove (3), and lower sealing covers (10) are fixedly sleeved on two sides of the fusing through groove (3).
2. A high breaking capacity multi-stage fuse according to claim 1, wherein: a spring (11) movably sleeved on the outer side of the lead (8) is arranged between the lower piston (5) and the lower sealing cover (10), one end of the spring (11) is fixedly connected with the side face of the lower piston (5), the other end of the spring (11) is movably sleeved with the lower sealing cover (10), and an insulating layer wraps the outer portion of the spring (11).
3. A high breaking capacity multi-stage fuse according to claim 1, wherein: two upper pistons (13) are movably sleeved in the standby through groove (2), the two upper pistons (13) are respectively positioned on two sides of the middle through groove (4), and quartz sand is filled between the two upper pistons (13).
4. A high breaking capacity multi-stage fuse according to claim 1, wherein: the two sides of the standby through groove (2) are respectively provided with an upper sealing cover (9), the opposite sides of the upper piston (13) and the upper sealing cover (9) are respectively and fixedly connected with a first magnetic ring (14) and a second magnetic ring (15), the opposite sides of the first magnetic ring (14) and the second magnetic ring (15) have opposite magnetic poles, and a pull wire (16) is fixedly connected between the upper piston (13) and the upper sealing cover (9).
5. A high breaking capacity multi-stage fuse according to claim 1, wherein: the inboard of lower piston (5) is equipped with binding post (17), in binding post (17) was assembled to the one end suit of fuse-element (7) and wire (8), and binding post (17) top middle part seted up locating hole (18), locating hole (18) internal thread cover is equipped with the bolt that is used for fixed fuse-element (7) and wire (8).
6. A high breaking capacity multi-stage fuse according to claim 1, wherein: and a sealing plug (12) for sealing the lead (8) is arranged on the outer side of the lower piston (5).
7. A high breaking capacity multi-stage fuse according to claim 1, wherein: the length value of the arc-shaped baffle (6) is half of the width value of the middle through groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210533986.3A CN114899061B (en) | 2022-05-17 | 2022-05-17 | Multistage fuse with high breaking capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210533986.3A CN114899061B (en) | 2022-05-17 | 2022-05-17 | Multistage fuse with high breaking capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114899061A true CN114899061A (en) | 2022-08-12 |
| CN114899061B CN114899061B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210533986.3A Active CN114899061B (en) | 2022-05-17 | 2022-05-17 | Multistage fuse with high breaking capacity |
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| CN (1) | CN114899061B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202585300U (en) * | 2012-02-02 | 2012-12-05 | 醴陵市精格特种瓷有限公司 | High voltage current limiting fuse with rolling structure |
| CN205319014U (en) * | 2016-02-01 | 2016-06-15 | 江苏苏爱尔电力设备有限公司 | Voltage transformer with fuse |
| US20160268089A1 (en) * | 2014-11-14 | 2016-09-15 | Littelfuse, Inc. | High-current fuse with endbell assembly |
| US20170053767A1 (en) * | 2014-04-30 | 2017-02-23 | Subsea 7 Limited | Subsea Replaceable Fuse Assembly |
| CN207233686U (en) * | 2017-09-19 | 2018-04-13 | 李品 | A kind of power grid fuse protecting device for being easily installed dismounting |
| CN111785593A (en) * | 2020-08-20 | 2020-10-16 | 东莞市贝特电子科技股份有限公司 | Surface-mounted current fuse and preparation method thereof |
| CN216054559U (en) * | 2021-06-24 | 2022-03-15 | 比亚迪股份有限公司 | Fuse and vehicle |
| CN216528721U (en) * | 2021-12-07 | 2022-05-13 | 苏州燎原电器制造有限公司 | Low-voltage high-breaking-capacity fuse |
-
2022
- 2022-05-17 CN CN202210533986.3A patent/CN114899061B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202585300U (en) * | 2012-02-02 | 2012-12-05 | 醴陵市精格特种瓷有限公司 | High voltage current limiting fuse with rolling structure |
| US20170053767A1 (en) * | 2014-04-30 | 2017-02-23 | Subsea 7 Limited | Subsea Replaceable Fuse Assembly |
| US20160268089A1 (en) * | 2014-11-14 | 2016-09-15 | Littelfuse, Inc. | High-current fuse with endbell assembly |
| CN205319014U (en) * | 2016-02-01 | 2016-06-15 | 江苏苏爱尔电力设备有限公司 | Voltage transformer with fuse |
| CN207233686U (en) * | 2017-09-19 | 2018-04-13 | 李品 | A kind of power grid fuse protecting device for being easily installed dismounting |
| CN111785593A (en) * | 2020-08-20 | 2020-10-16 | 东莞市贝特电子科技股份有限公司 | Surface-mounted current fuse and preparation method thereof |
| CN216054559U (en) * | 2021-06-24 | 2022-03-15 | 比亚迪股份有限公司 | Fuse and vehicle |
| CN216528721U (en) * | 2021-12-07 | 2022-05-13 | 苏州燎原电器制造有限公司 | Low-voltage high-breaking-capacity fuse |
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| Publication number | Publication date |
|---|---|
| CN114899061B (en) | 2023-08-11 |
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Effective date of registration: 20230719 Address after: 528425 Card 6, First Floor, No. 199 Yong'an Road, Tongle Industrial Park, Anle Village, Dongfeng Town, Zhongshan City, Guangdong Province Applicant after: ZHONGSHAN QIANFU HAOTAITAI ELECTRICAL APPLIANCE INDUSTRIAL CO.,LTD. Address before: 225006 No. 8 Shawan South Road, Guangling Industrial Park, Jiangsu, Yangzhou Applicant before: YANGZHOU SENYUAN ELECTRIC Co.,Ltd. |
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