CN108878229B - Small-sized thermomagnetic release - Google Patents
Small-sized thermomagnetic release Download PDFInfo
- Publication number
- CN108878229B CN108878229B CN201710338157.9A CN201710338157A CN108878229B CN 108878229 B CN108878229 B CN 108878229B CN 201710338157 A CN201710338157 A CN 201710338157A CN 108878229 B CN108878229 B CN 108878229B
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- China
- Prior art keywords
- iron core
- trip
- thermal element
- shaft
- static iron
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 92
- 230000003068 static effect Effects 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
Abstract
The utility model provides a small-size thermomagnetic release, it includes hot trip subassembly and magnetism trip subassembly, its characterized in that: the thermal tripping assembly comprises a thermal element, wherein a bimetallic strip is arranged on the thermal element, overload current flows through the thermal element to enable the thermal element to generate heat, and the bimetallic strip is heated and deformed to push a traction rod so as to drive a mechanism to act and trip; when short-circuit current is conducted in the thermal element, a magnetic field is generated, so that the magnetic tripping assembly magnetizes and pushes the traction rod, and the mechanism is driven to act and trip. The invention adopts the up-down clapping type movable and static iron cores, reduces the volume of the installation mode in the length direction, has modularized thermal components, is convenient and quick to install and replace, and reduces the later maintenance cost; furthermore, the miniature thermomagnetic release can be used for realizing the universality of thermomagnetic release components on circuit breakers of various specifications, so that the miniature thermomagnetic release has stronger applicability.
Description
Technical Field
The invention belongs to the technical field of release, and particularly relates to a small-sized thermomagnetic release.
Background
The thermomagnetic release is an important component of the molded case circuit breaker, and has the functions of overload protection and short-circuit protection in the whole circuit breaker, and the thermomagnetic release has stable and reliable performance and wide application. When overload current exists in a circuit, the bimetallic strip of the thermal protection element is heated to deform to push the traction rod so as to enable the operating mechanism to act and disconnect the circuit; when short-circuit current exists in the circuit, the electromagnetic system generates electromagnetic force, and the armature moves to drive the traction rod, so that the operating mechanism acts to break the circuit. The position relationship between the thermal trip device of the existing thermal magnetic trip device and the movable iron core of the magnetic trip device is shown as front-back installation, the installation mode has the advantages of simple structure and easy installation for the circuit breaker with low requirement on the length direction, but the circuit breaker with limitation on the length direction is difficult to realize in the existing installation mode, and the existing structure is needed
The patent of China patent application No. 201420356331.4 discloses a thermomagnetic release, which comprises a movable iron core part and a static iron core part formed by superposing a static iron core, a thermal element, a bimetallic strip and a conductive element, wherein the static iron core is positioned at the bottommost layer of the static iron core part, a bulge extending towards the topmost layer of the static iron core part is formed on the superposed part of the static iron core, and the thermal element, the bimetallic strip and the conductive element are respectively formed with holes which have basically the same size and shape as the bulge so as to be suitable for the bulges to sequentially pass through; the protrusions pass through the holes of the elements in sequence and then are subjected to axial force to be applied to the tail end faces of the protrusions to thicken the tail end faces of the protrusions so as to form a riveting structure for fixedly connecting the static iron core, the thermal element, the bimetallic strip and the conductive element together. The thermomagnetic release has the advantages that the consistency of the structural positions is improved, the installation process is simplified, the installation difficulty is reduced, and the defects of overlarge size and poor interchangeability in the length installation direction still exist.
Disclosure of Invention
The invention aims at solving the technical defects that the existing thermomagnetic release is overlarge in size and poor in interchangeability in the length installation direction, and provides a small thermomagnetic release, wherein an up-down clapping type movable and static iron core is adopted, so that the size in the length direction of an installation mode is reduced, a thermal assembly is modularized, the installation and replacement are convenient and quick, and the later maintenance cost is reduced; secondly, the thermomagnetic release assembly can be used for circuit breakers of various specifications, so that the thermomagnetic release assembly has stronger applicability.
Technical proposal
In order to achieve the technical purpose, the invention designs a small-sized thermomagnetic release, which comprises a thermal tripping assembly and a magnetic tripping assembly, and is characterized in that: the thermal tripping assembly comprises a thermal element, wherein a bimetallic strip is arranged on the thermal element, overload current flows through the thermal element to enable the thermal element to generate heat, and the bimetallic strip is heated and deformed to push a traction rod so as to drive a mechanism to act and trip;
when short-circuit current is conducted in the thermal element, a magnetic field is generated, so that the magnetic tripping assembly magnetizes and pushes the traction rod, and the mechanism is driven to act and trip.
Further, the magnetic tripping assembly comprises a movable iron core and a static iron core, wherein the static iron core is arranged on a static iron core support, one end of the movable iron core is arranged on a movable iron core shaft and can rotate around a movable iron core shaft, the movable iron core shaft is arranged on the static iron core support, the other end of the movable iron core is provided with a first linkage shaft, the outer end of the first linkage shaft is connected with the lower end of a second linkage shaft, the upper end of the second linkage shaft is connected with a push rod, the push rod is arranged on a push rod shaft and can rotate around the push rod shaft, the push rod shaft is arranged on the push rod support, a driving rod extends out of the push rod, and in the process of rotating the push rod, a traction rod can be pushed by the driving rod so as to drive a mechanism to act and trip;
the outer end of one side of the movable iron core, which is positioned on the movable iron core shaft, is provided with a spring, one end of the spring is arranged on the movable iron core, and the other end of the spring is arranged on the static iron core bracket;
the driving rod is provided with a push rod reset spring;
the thermal element is positioned in a cavity hole formed by the movable iron core and the static iron core, when short-circuit current is conducted in the thermal element, a magnetic field is generated to enable the movable iron core to be attracted with the static iron core, and the bimetallic strip is arranged on the thermal element and positioned on the outer side of the static iron core bracket.
Preferably, the static iron core support is U-shaped, the static iron core is U-shaped static iron core, the push rod support and the static iron core support are arranged above the right arm of the static iron core support as a whole, the left arm of the static iron core support is provided with a pressure rod through a pressure rod shaft, the pressure rod is provided with an adjusting screw, and the adjusting screw props against the movable iron core.
Preferably, the bimetal strip is L-shaped, a fixing groove is formed in the thermal element, the bottom of the bimetal strip is fixedly arranged in the fixing groove, and the upper end of the bimetal strip corresponds to the traction rod.
Further, the static iron core support is fixedly arranged on the release base.
Further, the magnetic release assembly is connected with the base and the moving contact assembly through the connecting plate, and the magnetic release assembly is installed in the cavity of the base.
Preferably, the outer end of the first linkage shaft is arranged in a hole at the lower end of the second linkage shaft, and the upper end of the second linkage shaft is arranged in a linkage hole on the push rod.
Further, an adjusting nut is arranged at the upper end of the second linkage shaft to limit the length of the upper end of the second linkage shaft penetrating through the linkage hole.
Advantageous effects
The invention provides a small-sized thermomagnetic release, which adopts an up-down clapping type dynamic and static iron core, reduces the volume of an installation mode in the length direction, has modularized heat components, is convenient and quick to install and replace, and reduces the later maintenance cost; furthermore, the miniature thermomagnetic release can be used for realizing the universality of thermomagnetic release components on circuit breakers of various specifications, so that the miniature thermomagnetic release has stronger applicability.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is an exploded view of a magnetic trip assembly in accordance with an embodiment of the present invention.
Fig. 3 is a schematic diagram of a magnetization trip action structure of the magnetic trip assembly according to an embodiment of the present invention.
Fig. 4 is an exploded view of a thermal trip assembly in accordance with an embodiment of the present invention.
Fig. 5 is a schematic diagram of a thermal trip assembly thermal trip action structure according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a mechanism structure in an embodiment of the present invention.
Fig. 7 is a schematic diagram of a working installation structure of an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1, the small-sized thermomagnetic release according to the embodiment comprises a thermal release assembly 1 and a magnetic release assembly 2, wherein the thermal release assembly 1 comprises a thermal element 101, a bimetallic strip 102 is arranged on the thermal element 101, as shown in fig. 5, an overload current flows through the thermal element 101 to heat the thermal element 101, and the bimetallic strip 102 is deformed by heating to push a traction rod 3 so as to drive a mechanism 4 shown in fig. 6 to release; as shown in fig. 3, when a short-circuit current is applied to the thermal element 101, a magnetic field is generated to magnetize the magnetic trip assembly 2 to push the traction rod 3, so as to drive the mechanism 4 to act and trip.
As shown in fig. 2 and 3, the magnetic trip assembly 2 includes a movable iron core 201 and a stationary iron core 202, the U-shaped stationary iron core 202 is fixedly mounted on a U-shaped stationary iron core support 203, one end of the movable iron core 201 is mounted on a movable iron core shaft 204 and can rotate around the movable iron core shaft 204, the movable iron core shaft 204 is mounted on the stationary iron core support 203, the other end of the movable iron core 201 is provided with a first linkage shaft 205, the outer end of the first linkage shaft 205 is mounted in a lower end hole 206a of a second linkage shaft 206, and the upper end of the second linkage shaft 206 is mounted in a linkage hole 207a of a push rod 207. In order to adjust the initial angle of the push rod 207, the adjusting nut 206b is installed at the upper end of the second linkage shaft 206, so as to limit the length of the upper end of the second linkage shaft 206 passing through the linkage hole 207 a.
The movable iron core 201 drives the first linkage shaft 205 to rotate in the rotating process, the first linkage shaft 205 drives the second linkage shaft 206 to move in the rotating process, and the second linkage shaft 206 drives the push rod 207 to rotate in the moving process; the push rod 207 is arranged on the push rod shaft 208 and can rotate around the push rod shaft 208, the push rod shaft 208 is arranged on the push rod bracket 209, the push rod 207 extends out of the driving rod 207a, and the traction rod 3 can be pushed by the driving rod 207a in the rotating process of the push rod 207 so as to drive the mechanism 4 to act and trip; the driving rod 207a is provided with a push rod reset spring 210, the push rod reset spring 210 is hung on the push rod bracket 209, and when the suction force disappears, the push rod 207 is reversely reset by the push rod reset spring 210; the spring 211 is arranged at the outer end of one side of the movable iron core 201, which is positioned on the movable iron core shaft 204, one end of the spring 211 is arranged on the movable iron core 201, the other end of the spring 211 is arranged on the static iron core bracket 203, and the spring 211 can reversely rotate and reset the movable iron core 201 after the suction and force are eliminated. The thermal element 101 passes through a cavity 202a formed by the movable iron core 201 and the static iron core 202 and is locked on the connecting plate 6 by a screw, when short-circuit current is conducted in the thermal element 101, a magnetic field is generated to enable the movable iron core 201 and the static iron core 202 to be attracted, and the bimetallic strip 102 is arranged on the thermal element 101 and is positioned outside the static iron core bracket 203.
In this embodiment, a preferred structure is that the push rod support 209 and the static iron core support 203 are integrated and located above the right arm of the static iron core support 203, a compression bar 213 is installed on the left arm of the static iron core support 203 through a compression bar shaft 212, an adjusting screw 214 is installed on the compression bar 213, and the adjusting screw 214 abuts against the movable iron core 201 to adjust the initial angle of the movable iron core 201.
As shown in fig. 4, the bimetal 102 is L-shaped, a fixing groove 101a is provided on the thermal element 101, the bottom of the bimetal 102 is fixedly mounted in the fixing groove 101a, and the upper end of the bimetal 102 corresponds to the traction rod 3.
As shown in fig. 7, the stationary core bracket 203 is fixedly mounted on the trip unit base 5. The magnetic release assembly 2 is connected with the base 7 and the moving contact assembly 8 through the connecting plate 6, and the magnetic release assembly 2 is installed in the cavity 701 of the base 7.
The structures, proportions, sizes, etc. shown in the drawings of the embodiments of the present invention are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the invention, so that any structural modifications, proportional changes, or size adjustment should not be construed as essential to the invention, but should still fall within the scope of the disclosure without affecting the efficacy or achievement of the invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "anticlockwise" and the like are used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, and the relative relation changes or modifications thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Claims (7)
1. The utility model provides a small-size thermomagnetic release, it includes thermal trip subassembly and magnetic trip subassembly, its characterized in that: the thermal tripping assembly comprises a thermal element, wherein a bimetallic strip is arranged on the thermal element, overload current flows through the thermal element to enable the thermal element to generate heat, and the bimetallic strip is heated and deformed to push a traction rod so as to drive a mechanism to act and trip;
when short-circuit current is conducted in the thermal element, a magnetic field is generated to enable the magnetic tripping assembly to magnetize and push the traction rod so as to drive the mechanism to act and trip;
the magnetic tripping assembly comprises a movable iron core and a static iron core, wherein the static iron core is arranged on a static iron core support, one end of the movable iron core is arranged on a movable iron core shaft and can rotate around a movable iron core shaft, the movable iron core shaft is arranged on the static iron core support, the other end of the movable iron core is provided with a first linkage shaft, the outer end of the first linkage shaft is connected with the lower end of a second linkage shaft, the upper end of the second linkage shaft is connected with a push rod, the push rod is arranged on a push rod shaft and can rotate around the push rod shaft, the push rod shaft is arranged on the push rod support, a driving rod extends out of the push rod, and in the process of rotating the push rod, a traction rod can be pushed by the driving rod so as to drive a mechanism to act and trip;
the outer end of one side of the movable iron core, which is positioned on the movable iron core shaft, is provided with a spring, one end of the spring is arranged on the movable iron core, and the other end of the spring is arranged on the static iron core bracket;
the driving rod is provided with a push rod reset spring;
the thermal element is positioned in a cavity hole formed by the movable iron core and the static iron core, when short-circuit current is conducted in the thermal element, a magnetic field is generated to enable the movable iron core to be attracted with the static iron core, and the bimetallic strip is arranged on the thermal element and positioned on the outer side of the static iron core bracket.
2. The miniature thermomagnetic trip of claim 1, wherein: the static iron core support is U-shaped, the static iron core is U-shaped static iron core, the push rod support and the static iron core support are arranged above the right arm of the static iron core support as a whole, the left arm of the static iron core support is provided with a pressure rod through a pressure rod shaft, the pressure rod is provided with an adjusting screw, and the adjusting screw props against the movable iron core.
3. The miniature thermomagnetic trip of claim 1, wherein: the bimetallic strip is L-shaped, a fixing groove is formed in the thermal element, the bottom of the bimetallic strip is fixedly arranged in the fixing groove, and the upper end of the bimetallic strip corresponds to the traction rod.
4. The miniature thermomagnetic trip of claim 1, wherein: the static iron core support is fixedly arranged on the release base.
5. The miniature thermomagnetic trip of claim 1, wherein: the magnetic release assembly is connected with the base and the moving contact assembly through the connecting plate and is arranged in the cavity of the base.
6. The miniature thermomagnetic trip of claim 1, wherein: the outer end of the first linkage shaft is arranged in a hole at the lower end of the second linkage shaft, and the upper end of the second linkage shaft is arranged in a linkage hole on the push rod.
7. The miniature thermomagnetic trip of claim 6, wherein: the upper end of the second linkage shaft is provided with an adjusting nut which can limit the length of the upper end of the second linkage shaft penetrating through the linkage hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338157.9A CN108878229B (en) | 2017-05-15 | 2017-05-15 | Small-sized thermomagnetic release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338157.9A CN108878229B (en) | 2017-05-15 | 2017-05-15 | Small-sized thermomagnetic release |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108878229A CN108878229A (en) | 2018-11-23 |
| CN108878229B true CN108878229B (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710338157.9A Active CN108878229B (en) | 2017-05-15 | 2017-05-15 | Small-sized thermomagnetic release |
Country Status (1)
| Country | Link |
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| CN (1) | CN108878229B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559228A (en) * | 1976-10-18 | 1980-01-16 | Bbc Brown Boveri & Cie | Electric automatic cut out for overload and short-circuit current tripping |
| CN1815660A (en) * | 2006-03-06 | 2006-08-09 | 浙江正泰电器股份有限公司 | Split thermomagnetic adjustable release device for circuit breaker |
| CN101685728A (en) * | 2008-09-26 | 2010-03-31 | 浙江正泰电器股份有限公司 | Thermomagnetic tripper of breaker |
| CN103021749A (en) * | 2012-12-28 | 2013-04-03 | 常熟开关制造有限公司(原常熟开关厂） | Circuit breaker capable of quickly releasing |
| CN103606493A (en) * | 2013-12-02 | 2014-02-26 | 南京工程学院 | Thermomagnetic release with thermal compensation function |
| CN203746773U (en) * | 2014-01-17 | 2014-07-30 | 浙江正泰电器股份有限公司 | Clapping type electromagnetic tripping system |
| CN203950763U (en) * | 2014-07-25 | 2014-11-19 | 德力西电气有限公司 | A kind of plastic case circuit breaker release device |
| CN204332853U (en) * | 2015-01-27 | 2015-05-13 | 浙江天正电气股份有限公司 | A kind of release apparatus with overload and short-circuit protection faulty indication |
| CN205335193U (en) * | 2015-12-14 | 2016-06-22 | 浙江正泰电器股份有限公司 | Hot not trip gear that reports to police that transships of circuit breaker |
| CN205992520U (en) * | 2016-09-21 | 2017-03-01 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnetic tripping apparatus and the low-voltage circuit breaker using this electromagnetic tripping apparatus |
| CN206921768U (en) * | 2017-05-15 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of small-sized Pyromagnetic release |
-
2017
- 2017-05-15 CN CN201710338157.9A patent/CN108878229B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559228A (en) * | 1976-10-18 | 1980-01-16 | Bbc Brown Boveri & Cie | Electric automatic cut out for overload and short-circuit current tripping |
| CN1815660A (en) * | 2006-03-06 | 2006-08-09 | 浙江正泰电器股份有限公司 | Split thermomagnetic adjustable release device for circuit breaker |
| CN101685728A (en) * | 2008-09-26 | 2010-03-31 | 浙江正泰电器股份有限公司 | Thermomagnetic tripper of breaker |
| CN103021749A (en) * | 2012-12-28 | 2013-04-03 | 常熟开关制造有限公司(原常熟开关厂） | Circuit breaker capable of quickly releasing |
| CN103606493A (en) * | 2013-12-02 | 2014-02-26 | 南京工程学院 | Thermomagnetic release with thermal compensation function |
| CN203746773U (en) * | 2014-01-17 | 2014-07-30 | 浙江正泰电器股份有限公司 | Clapping type electromagnetic tripping system |
| CN203950763U (en) * | 2014-07-25 | 2014-11-19 | 德力西电气有限公司 | A kind of plastic case circuit breaker release device |
| CN204332853U (en) * | 2015-01-27 | 2015-05-13 | 浙江天正电气股份有限公司 | A kind of release apparatus with overload and short-circuit protection faulty indication |
| CN205335193U (en) * | 2015-12-14 | 2016-06-22 | 浙江正泰电器股份有限公司 | Hot not trip gear that reports to police that transships of circuit breaker |
| CN205992520U (en) * | 2016-09-21 | 2017-03-01 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnetic tripping apparatus and the low-voltage circuit breaker using this electromagnetic tripping apparatus |
| CN206921768U (en) * | 2017-05-15 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of small-sized Pyromagnetic release |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108878229A (en) | 2018-11-23 |
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