CN218182155U - Thermal overload release and circuit breaker - Google Patents
Thermal overload release and circuit breaker Download PDFInfo
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- CN218182155U CN218182155U CN202222335581.7U CN202222335581U CN218182155U CN 218182155 U CN218182155 U CN 218182155U CN 202222335581 U CN202222335581 U CN 202222335581U CN 218182155 U CN218182155 U CN 218182155U
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Abstract
The utility model relates to a thermal overload release technical field, in particular to thermal overload release and circuit breaker. The bimetal component comprises a bimetal component, a current-carrying conductor, a draw bar, a connecting plate and a sheet-shaped elastic heating component, wherein the current-carrying conductor is arranged at one end of the bimetal component, the draw bar is arranged at one end of the bimetal component, which is far away from the current-carrying conductor, one end of the sheet-shaped elastic heating component is arranged on the bimetal component, and the connecting plate is arranged at one end of the sheet-shaped elastic heating component, which is far away from the bimetal component. The utility model discloses an adopt slice elasticity heating element to make the bimetallic strip in the high disconnected circuit breaker of undercurrent specification not only can obtain sufficient heat and crooked volume to detect fault current effectively, reduce the calorific capacity of disconnected in-process bimetallic strip simultaneously, ensure that the undercurrent specification bimetallic strip can not permanent deformation when the high disconnected electric current of section, promoted the disconnected reliability of circuit breaker.
Description
Technical Field
The utility model belongs to the technical field of thermal overload release, in particular to thermal overload release and circuit breaker.
Background
The thermal overload trip device is an important component of a low-voltage molded case circuit breaker, and the existing thermal overload trip device is generally composed of a heating element and a thermal driving component which is deformed under the action of heat to drive a trip mechanism to trip. The thermal driving part is usually a bimetallic strip, the bimetallic strip is composed of two metals with different expansion coefficients, one end of the bimetallic strip is fixed, the other end of the bimetallic strip is free, when overload current exists in a circuit, the bimetallic strip is heated to deform, the free end bends to push the tripping mechanism, and therefore the tripping mechanism acts to disconnect the circuit to realize thermal overload protection. According to whether the bimetallic strip participates in heating or not, the heating mode of the bimetallic strip can be divided into three types: direct heating, indirect heating and composite heating. The direct heating mode is that the bimetallic strip is directly connected in series in the circuit, and the heat generated by the resistance of the bimetallic strip is used as a heating source; the indirect heating mode means that the bimetallic strip is not connected into a circuit, but is heated by other electric heating elements; the composite heating mode is that the bimetallic strip is directly connected in series in a circuit, and other electric heating elements are used for heating the bimetallic strip.
Through retrieval, in the prior art, the Chinese patent application number: cn202022948286.X, application date: 2020-12-07, discloses a thermal overload release and a circuit breaker, relating to the technical field of thermal overload releases, in particular to a thermal overload release and a circuit breaker; the utility model discloses a, under the condition that does not increase bimetallic strip height, adopt two or multi-disc bimetallic strip superimposed forms, under the unchangeable condition of whole thickness, through the thickness that reduces the monolithic bimetallic strip, effectively increased the amount of deflection of bimetallic strip, even under the condition of undercurrent, also can guarantee the dropout energy, have great help to the action reliability that improves overload protection.
However, the device still has the following defects:
1. when the requirement of thermal tripping characteristics of different rated current specifications is to be met, the bimetallic strips of different specifications are required to be adopted, the more the rated current specifications are, the more the required bimetallic strip specifications are, the more the material types are directly increased, the difficulty of production management is increased, and the production cost of products is improved.
2. The breaker needs to carry out overload release performance verification after completing the breaking test, the low-current specification thermal release is easy to overheat during the breaking test, the high-breaking type breaker is easier to realize the condition, and meanwhile, the permanent deformation of the bimetallic strip can cause the overload release performance verification and cannot meet the requirements.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a thermal overload release. The bimetal component comprises a bimetal component, a current-carrying conductor, a draw bar, a connecting plate and a sheet-shaped elastic heating component, wherein the current-carrying conductor is arranged at one end of the bimetal component, the draw bar is arranged at one end of the bimetal component, which is far away from the current-carrying conductor, one end of the sheet-shaped elastic heating component is arranged on the bimetal component, and the connecting plate is arranged at one end of the sheet-shaped elastic heating component, which is far away from the bimetal component.
Furthermore, the bimetal assembly comprises a first bimetal and a plurality of groups of second bimetal, and one end of the first bimetal close to the current-carrying conductor is arranged at one end of the plurality of groups of second bimetal close to the current-carrying conductor.
Further, the first bimetallic strip and a plurality of groups of second bimetallic strips are superposed in the same direction, and the length of the plurality of groups of second bimetallic strips is smaller than that of the first bimetallic strip.
Furthermore, an adjusting screw is installed at one end, close to the traction rod, of the first bimetal piece, and the adjusting screw is installed on the traction rod.
Furthermore, a connecting piece is arranged on the connecting plate, and the connecting piece is arranged on the sheet elastic heating assembly.
Furthermore, the sheet-shaped elastic heating component comprises a plurality of groups of sheet-shaped elastic heating elements, the plurality of groups of sheet-shaped elastic heating elements are mutually overlapped and sequentially installed, a first connecting end is installed at one end of each of the plurality of groups of sheet-shaped elastic heating elements, the first connecting end is installed on the connecting piece, a second connecting end is installed at the other end of each of the plurality of groups of sheet-shaped elastic heating elements, and the second connecting end is installed on the first bimetallic strip.
A circuit breaker comprises the thermal overload release.
The beneficial effects of the utility model are that:
1. the utility model discloses an adopt slice elastic heating element to make the bimetallic strip in the high disconnected circuit breaker of undercurrent specification not only can obtain sufficient heat and deflection to detect fault current effectively, reduce the calorific capacity of bimetallic strip in the disjunction process simultaneously, guarantee that the bimetallic strip can not permanent deformation when undercurrent specification is high disconnected electric current, promoted the disconnected reliability of circuit breaker;
2. the utility model discloses a length that changes the access circuit part between slice elastic heating element's the number of pieces and the bimetal both ends adjusts the resistance that the bimetallic strip accessed the circuit part, and then realizes the adjustment to thermal overload release rated current, can realize satisfying the thermal trip characteristic requirement of multiple different rated current specifications with the bimetallic strip of same specification, has reduced material quantity, has reduced part cost and cost of management, has made things convenient for production and processing.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic axial side structure according to embodiment 1 of the present invention;
fig. 2 shows a schematic structural diagram according to embodiment 1 of the present invention;
fig. 3 shows a schematic structural view of a sheet-like elastic heating element according to embodiment 1 of the present invention;
fig. 4 shows a schematic structural diagram according to embodiment 2 of the present invention;
fig. 5 shows a schematic diagram of a third connection end structure according to embodiment 2 of the present invention.
In the figure: 110. a first bimetal sheet; 120. a second bimetallic strip; 130. an adjusting screw; 210. a current carrying conductor; 310. a draw bar; 410. a coupling plate; 420. a connecting member; 510. a sheet-like elastic heating element; 520. a first connection end; 530. a second connection end; 540. a third connection end; 541. and (7) mounting holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are 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 some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-5.
Example one
The utility model provides a thermal overload release and circuit breaker. The bimetal component comprises a bimetal component, a current-carrying conductor 210, a traction rod 310, a coupling plate 410 and a sheet-shaped elastic heating component, wherein the current-carrying conductor 210 is installed at one end of the bimetal component, the traction rod 310 is installed at one end, far away from the current-carrying conductor 210, of the bimetal component, one end of the sheet-shaped elastic heating component is installed on the bimetal component, and the coupling plate 410 is installed at one end, far away from the bimetal component, of the sheet-shaped elastic heating component.
The bimetal assembly comprises a first bimetal 110 and a plurality of groups of second bimetal 120, wherein one end of the first bimetal 110 close to the current-carrying conductor 210 is arranged at one end of the plurality of groups of second bimetal 120 close to the current-carrying conductor 210.
The first bimetal sheet 110 and the plurality of groups of second bimetal sheets 120 are stacked in the same direction, and the length of the plurality of groups of second bimetal sheets 120 is smaller than that of the first bimetal sheet 110.
The length of the second bimetal sheet 120 is smaller than that of the first bimetal sheet 110 for avoiding the bending deformation interference of the second bimetal sheet 120 and the first bimetal sheet 110.
An adjusting screw 130 is installed at one end of the first bimetal 110 close to the drawbar 310, and the adjusting screw 130 is installed on the drawbar 310.
The adjustment screw 130 is used to adjust the position of the trip action.
The connection plate 410 is provided with a connector 420, and the connector 420 is mounted on the sheet-shaped elastic heat generating assembly.
The resistance of the bimetallic strip access circuit part is adjusted by changing the number of the sheet-shaped elastic heating elements 510 and the length of the access circuit part between the two ends of the bimetallic strip, so that the rated current of the thermal overload release is adjusted, the requirements of thermal release characteristics of various rated current specifications can be met by the bimetallic strip with the same specification, the material quantity is reduced, the part cost and the management cost are reduced, and the production, processing and the management of the bimetallic strip are facilitated
The sheet-shaped elastic heating element assembly comprises a plurality of groups of sheet-shaped elastic heating elements 510, the plurality of groups of sheet-shaped elastic heating elements 510 are sequentially mounted in an overlapping manner, a first connecting end 520 is mounted at one end of each of the plurality of groups of sheet-shaped elastic heating elements 510, the first connecting end 520 is mounted on a connecting piece 420, a second connecting end 530 is mounted at the other end of each of the plurality of groups of sheet-shaped elastic heating elements 510, and the second connecting end 530 is mounted on the first bimetal 110.
The sheet elastic heating element is adopted, so that the bimetallic strip in the high breaking circuit breaker with the small current specification can obtain enough heat and bending quantity, the fault current is effectively detected, meanwhile, the heating quantity of the bimetallic strip in the breaking process is reduced, the bimetallic strip cannot be permanently deformed when the small current specification is subjected to high breaking current, and the breaking reliability of the circuit breaker is improved.
A circuit breaker comprises the thermal overload release.
Example two
In the first embodiment, the second connection 530 is replaced by a third connection 540.
The third connection end 540 is installed at the other end of the plurality of groups of sheet-like elastic heating elements 510, and the third connection end 540 is installed on the first bimetal sheet 110 and the plurality of groups of second bimetal sheets 120 through the installation hole 541.
The third connection end 540 is used for connecting the sheet-shaped elastic heating element 510 with the second bimetal sheet 120 and the first bimetal sheet 110, respectively, so that the second bimetal sheet 120 and the first bimetal sheet 110 obtain sufficient heat and bending amount.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A thermal overload release is characterized in that: the bimetal component comprises a bimetal component, a current-carrying conductor (210), a traction rod (310), a coupling plate (410) and a sheet-shaped elastic heating component, wherein the current-carrying conductor (210) is installed at one end of the bimetal component, the traction rod (310) is installed at one end, far away from the current-carrying conductor (210), of the bimetal component, one end of the sheet-shaped elastic heating component is installed on the bimetal component, and the coupling plate (410) is installed at one end, far away from the bimetal component, of the sheet-shaped elastic heating component.
2. A thermal overload trip apparatus according to claim 1, wherein: the bimetal assembly comprises a first bimetal sheet (110) and a plurality of groups of second bimetal sheets (120), wherein one end of the first bimetal sheet (110) close to the current-carrying conductor (210) is installed at one end of the plurality of groups of second bimetal sheets (120) close to the current-carrying conductor (210).
3. A thermal overload trip apparatus according to claim 2, wherein: the first bimetal sheet (110) and a plurality of groups of second bimetal sheets (120) are superposed in the same direction, and the length of the plurality of groups of second bimetal sheets (120) is smaller than that of the first bimetal sheet (110).
4. A thermal overload trip apparatus according to claim 3, wherein: an adjusting screw (130) is installed at one end, close to the traction rod (310), of the first bimetal sheet (110), and the adjusting screw (130) is installed on the traction rod (310).
5. A thermal overload trip apparatus according to claim 2, wherein: the connecting plate (410) is provided with a connecting piece (420), and the connecting piece (420) is arranged on the sheet-shaped elastic heating component.
6. A thermal overload trip apparatus according to claim 5, wherein: the sheet-shaped elastic heating component comprises a plurality of groups of sheet-shaped elastic heating elements (510), the plurality of groups of sheet-shaped elastic heating elements (510) are mutually overlapped and sequentially installed, a first connecting end (520) is installed at one end of each of the plurality of groups of sheet-shaped elastic heating elements (510), the first connecting end (520) is installed on a connecting piece (420), a second connecting end (530) is installed at the other end of each of the plurality of groups of sheet-shaped elastic heating elements (510), and the second connecting end (530) is installed on a first bimetal (110).
7. A circuit breaker, characterized by: comprising a thermal overload trip according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335581.7U CN218182155U (en) | 2022-09-02 | 2022-09-02 | Thermal overload release and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335581.7U CN218182155U (en) | 2022-09-02 | 2022-09-02 | Thermal overload release and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218182155U true CN218182155U (en) | 2022-12-30 |
Family
ID=84621138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222335581.7U Active CN218182155U (en) | 2022-09-02 | 2022-09-02 | Thermal overload release and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218182155U (en) |
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2022
- 2022-09-02 CN CN202222335581.7U patent/CN218182155U/en active Active
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