CN108321044B - Overload alarm non-tripping device for molded case circuit breaker - Google Patents
Overload alarm non-tripping device for molded case circuit breaker Download PDFInfo
- Publication number
- CN108321044B CN108321044B CN201810330710.9A CN201810330710A CN108321044B CN 108321044 B CN108321044 B CN 108321044B CN 201810330710 A CN201810330710 A CN 201810330710A CN 108321044 B CN108321044 B CN 108321044B
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- CN
- China
- Prior art keywords
- base
- circuit breaker
- traction rod
- bimetal element
- case circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007704 transition Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 210000003813 thumb Anatomy 0.000 abstract description 4
- 230000002441 reversible effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- 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
- H01H71/04—Means for indicating condition of the switching device
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- 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
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
Landscapes
- Thermally Actuated Switches (AREA)
- Breakers (AREA)
Abstract
The invention belongs to the technical field of circuit breakers, and particularly relates to an overload alarm non-tripping device of a molded case circuit breaker. The utility model provides a plastic case circuit breaker overload alarm trip unit, includes bimetal element and locates the base on the support, rotationally is equipped with the traction lever in the base, is equipped with the thumb on the traction lever, still fixedly on the base is equipped with micro-gap switch, micro-gap switch locates the thumb below, is equipped with the driver blade that corresponds with bimetal element on the traction lever, and bimetal element is heated backward driver blade crooked. The device adopts the structural principle of reverse action of the bimetal element, and the bimetal element bends towards the traction rod when heated, so that the device has a compact structure, can be arranged at the rear end of the circuit breaker, and is used for avoiding the connection with a circuit breaker component, greatly improving the stability of a product, and is particularly suitable for a molded case circuit breaker with a compact structure.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to an overload alarm non-tripping device of a molded case circuit breaker.
Background
The circuit breaker with overload alarm and non-tripping functions is widely applied to a power system, can meet the requirements that special places such as fire protection, chemical industry and medical treatment can only continuously supply power and can not be powered off, and avoids serious loss caused by power failure. According to the use requirement, the electricity reliability of the fire-fighting equipment must be ensured, and under the overload condition, the circuit breaker is required to be reliably switched on, and meanwhile, an alarm signal is fed back. In the prior art, the adopted thermal element bimetal is bent forwards, and the scheme is not applicable to compact circuit breakers at all and can be used only by having a wider space, so that the layout of the circuit breaker mechanism is severely limited.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the overload alarm non-tripping device of the molded case circuit breaker with compact layout.
In order to solve the technical problems, the invention is realized by the following technical scheme: the utility model provides a plastic case circuit breaker overload alarm trip unit, includes bimetal element and locates the base on the support, rotationally is equipped with the traction lever in the base, is equipped with the thumb on the traction lever, still fixedly on the base is equipped with micro-gap switch, micro-gap switch locates the thumb below, is equipped with the driver blade that corresponds with bimetal element on the traction lever, and bimetal element is heated backward driver blade crooked.
Further, an elastic connecting mechanism is arranged between the traction rod and the base.
Further, a spring connecting part is arranged in the base, a spring connecting column is arranged on the traction rod, and a spring is connected between the spring connecting part and the spring connecting column.
Further, the spring connecting portion and the spring connecting post are provided with a plurality of pairs.
Further, the traction rod comprises a plurality of bimetallic elements, and a plurality of driving pieces which are in one-to-one correspondence with the bimetallic elements are arranged on the traction rod.
Further, the traction rod is sleeved on the rotating shaft, and the rotating shaft is rotatably fixed on the base.
Further, an adjustable driving piece is arranged at the end part of the bimetal element corresponding to the driving piece, and the driving piece is separated from the driving piece when the bimetal element is not heated.
Further, the base is detachably connected to the bracket through the support member.
Further, be equipped with fixed chamber in the base, fixed intracavity is located on support piece upper portion, and fixed chamber top is equipped with the round hole, and support piece upper portion is equipped with the screw hole, is connected through the screw between support piece and the base.
Further, be equipped with circular connecting chamber in the support, connecting chamber upper portion both sides are equipped with the banding, are equipped with positioning groove on the banding, and the support piece bottom is equipped with waist circular connecting portion, is equipped with cylindrical transition portion between waist circular connecting portion upper portion and the support piece main part, and waist circular connecting portion rotationally locates in the connecting chamber, is equipped with the spacing boss that corresponds with positioning groove on the support piece main part bottom surface.
The invention has the advantages that the structure principle of reverse action of the bimetal element is adopted, the bimetal element bends towards the traction rod when heated, the structure is compact, the device can be arranged at the rear end of the circuit breaker, the connection with the circuit breaker component is stopped, the stability of the product is greatly improved, and the device is particularly suitable for a molded case circuit breaker with compact structure. The distance between the driving piece and the driving piece is adjustable, so that the sensitivity can be conveniently adjusted. The connection structure between the base and the bracket is convenient to install and detach.
Drawings
FIG. 1 is a schematic diagram of the connection of a base to a drawbar;
FIG. 2 is a schematic drawing of a drawbar configuration;
FIG. 3 is a schematic view of a base structure;
FIG. 4 is a schematic view of a support structure;
FIG. 5 is a schematic diagram of the connection of the base to the bracket;
fig. 6 is a schematic diagram of the overall structure of the present invention.
Wherein: 1. a base; 2. a traction rod; 3. a spring; 4. a rotating shaft; 5. a support; 8. a driving plate; 11. a threaded hole; 15. a limit boss; 16. a base positioning hole; 18. a pusher dog; 19. a drawbar rotation hole; 21. a spring connecting column; 23. a cylindrical transition portion; 24. a waist-round connecting part; 25. a fixed cavity; 26. a bimetal element; 29. a spring connection part; 36. a driving member; 39. a connecting cavity; 40. sealing edges; 41. a thermal element; 42. a bracket; 43. and a micro-switch.
Detailed Description
The invention is described in detail below with reference to the attached drawings and detailed description:
as shown in fig. 1, a traction rod 2 can be arranged in the base 1, the traction rod 2 is sleeved on the rotating shaft 4, a pusher dog 18 is arranged on the traction rod 2, a micro switch 43 is fixedly arranged on the base 1, the micro switch 43 is arranged below the pusher dog 18, and a driving piece 8 is arranged on the traction rod 2. Two spring connecting parts 29 are arranged in the base 1, two spring connecting columns 21 are arranged on the traction rod 2, and a spring 3 is connected between each pair of spring connecting parts 29 and the spring connecting columns 21.
As shown in fig. 2, the traction rod 2 is provided with a pusher dog 18 and three driving pieces 8, and the traction rod 2 is sleeved on the rotating shaft 4 through a traction rod rotating space 19.
As shown in fig. 3, the base 1 is provided with a base positioning hole 16, and the rotating shaft 4 is sleeved in the base positioning hole 16. The base 1 is provided with two spring connections 29.
As shown in fig. 4, a threaded hole 11 is formed in the upper portion of the support member 5, a kidney-shaped connecting portion 24 is formed in the bottom of the support member 5, a cylindrical transition portion 23 is formed between the upper portion of the kidney-shaped connecting portion 24 and the main body of the support member 5, and two limiting bosses 15 are formed on the bottom surface of the main body of the support member 5.
As shown in fig. 5, a circular connecting cavity 39 is arranged in the bracket 42, sealing edges 40 are arranged on two sides of the upper part of the connecting cavity 39, positioning grooves are arranged on the sealing edges 40, and the positioning grooves are matched with the limiting bosses 15 on the supporting piece 5. The waisted-shaped connecting portion 24 of the support 5 is arranged in the connecting cavity 39, and the cylindrical transition portion 23 of the support 5 is positioned in the middle of the edge seals 40 on both sides. The base 1 is provided with a fixed cavity 25, the upper part of the supporting piece 5 is arranged in the fixed cavity 25 of the base 1, the top of the fixed cavity 25 is provided with a round hole, and the supporting piece 5 is connected with the base 1 through a screw.
As shown in fig. 6, three thermal elements 41 are provided on the support 42, the three thermal elements 41 are respectively connected with the three bimetal elements 26, the end portions of the bimetal elements 26 corresponding to the driving plates 8 are provided with adjustable driving members 36, and when the bimetal elements 26 are not heated, the driving members 36 are separated from the driving plates 8.
Referring to fig. 5 and 6, the kidney-shaped connecting portion 24 of the supporting member 5 is inserted into the circular connecting cavity 39 from the middle of the edge sealing 40 and then rotated by a certain angle, the positioning groove on the edge sealing is clamped and positioned with the limiting boss 15 on the supporting member 5, the supporting member 5 is mounted on the bracket 42, and then the base 1 and the supporting member 5 are connected, so that the mounting of the base 1 and the bracket 42 is completed.
Specifically, as shown in fig. 6, when the circuit breaker is operating normally, the pulling rod 2 is located at the free position due to the acting force of the spring 3, the pusher dog 18 and the micro switch 43 are in a non-contact state, and meanwhile, the driving piece 36 and the driving piece 8 are also in a non-contact state, and at this time, the output signal of the micro switch 43 is a normally open signal.
When the circuit breaker is under the condition of continuous overload, that is, when the actual current in the circuit is greater than the rated current, the thermal element 41 of the circuit breaker continuously heats, so that the bimetal element 26 bends towards the traction rod 2 after being heated, the driving piece 36 at the end part of the bimetal element 26 drives the driving piece 8 on the traction rod 2, so that the traction rod 2 rotates around the rotating shaft 4 against the acting force of the spring 3, and when the traction rod 2 rotates for a certain angle, the pusher dog 18 touches the micro switch 43, and at the moment, the output signal of the micro switch C is a normally closed signal.
When the fault is cleared, the bimetal element 26 automatically resets, so that the driving piece 8 of the traction rod 2 is relieved from being stressed, the traction rod 2 is restored to the initial position under the action force of the spring 3, the same pusher dog 18 is restored to the initial position, at the moment, the pusher dog 18 and the micro switch 43 are in a non-contact state, and the output signal of the micro switch C is changed from a normally closed signal to a normally open signal.
It is emphasized that: the above embodiments are merely preferred embodiments of the present invention, and the present invention is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a plastic case circuit breaker overload alarm trip unit, includes bimetal and locates the base on the support, its characterized in that: the traction device comprises a base, a traction rod, a micro switch, a driving piece and a driving piece, wherein the traction rod is rotatably arranged in the base, a pusher dog is arranged on the traction rod, the base is fixedly provided with the micro switch, the micro switch is arranged below the pusher dog, the traction rod is provided with the driving piece corresponding to the bimetal element, and the bimetal element bends towards the driving piece after being heated;
an elastic connecting mechanism is arranged between the traction rod and the base;
the support is provided with a thermal element which is connected with the bimetal element, the end part of the bimetal element, which corresponds to the driving piece, is provided with an adjustable driving piece, and the driving piece is separated from the driving piece when the bimetal element is not heated;
the base and the thermal element are arranged at the rear end of the circuit breaker;
the base is detachably connected to the bracket through a supporting piece;
the base is internally provided with a fixed cavity, the upper part of the supporting piece is arranged in the fixed cavity, the top of the fixed cavity is provided with a round hole, the upper part of the supporting piece is provided with a threaded hole, and the supporting piece is connected with the base through a screw;
be equipped with circular connecting chamber in the support, connecting chamber upper portion both sides are equipped with the banding, be equipped with positioning groove on the banding, the support piece bottom is equipped with waist circular connecting portion, be equipped with cylindrical transition portion between waist circular connecting portion upper portion and the support piece main part, waist circular connecting portion rotationally locates in the connecting chamber, be equipped with the spacing boss that corresponds with positioning groove on the support piece main part bottom surface.
2. The molded case circuit breaker overload alarm non-trip apparatus according to claim 1, wherein: the novel traction device is characterized in that a spring connecting portion is arranged in the base, a spring connecting column is arranged on the traction rod, and a spring is connected between the spring connecting portion and the spring connecting column.
3. The molded case circuit breaker overload alarm non-trip apparatus according to claim 2, wherein: the spring connecting part and the spring connecting column are provided with a plurality of pairs.
4. The molded case circuit breaker overload alarm non-trip apparatus according to claim 1, wherein: the traction rod comprises a plurality of bimetallic elements, and a plurality of driving plates which are in one-to-one correspondence with the bimetallic elements are arranged on the traction rod.
5. The molded case circuit breaker overload alarm non-trip apparatus according to claim 1, wherein: the traction rod is sleeved on the rotating shaft, and the rotating shaft is rotatably fixed on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330710.9A CN108321044B (en) | 2018-04-13 | 2018-04-13 | Overload alarm non-tripping device for molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330710.9A CN108321044B (en) | 2018-04-13 | 2018-04-13 | Overload alarm non-tripping device for molded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108321044A CN108321044A (en) | 2018-07-24 |
| CN108321044B true CN108321044B (en) | 2024-02-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810330710.9A Active CN108321044B (en) | 2018-04-13 | 2018-04-13 | Overload alarm non-tripping device for molded case circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN108321044B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111180282B (en) * | 2020-01-09 | 2022-03-29 | 江苏辉能电气有限公司 | Thermal tripping device of high-capacity molded case circuit breaker and molded case circuit breaker |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203910702U (en) * | 2014-06-17 | 2014-10-29 | 浙江天正电气股份有限公司 | Plastic housing circuit breaker with thermal overload alarm non-tripping function |
| CN105007227A (en) * | 2015-06-15 | 2015-10-28 | 深圳市共进电子股份有限公司 | Router and packaging structure thereof |
| CN204857614U (en) * | 2015-08-24 | 2015-12-09 | 常熟开关制造有限公司(原常熟开关厂） | Moulded case circuit breaker with heat overload alarming function |
| CN205069536U (en) * | 2015-11-19 | 2016-03-02 | 巨邦电气集团有限公司 | Moulded case circuit breaker with hot function of not threading off of only reporting to police of transshipping |
| CN205911255U (en) * | 2016-07-22 | 2017-01-25 | 上海精益电器厂有限公司 | HM60 of circuit breaker 400 overload not trip gear that reports to police |
| CN208240596U (en) * | 2018-04-13 | 2018-12-14 | 法泰电器（江苏）股份有限公司 | Breaker of plastic casing overload-alarm non-tripping device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683124A (en) * | 2011-03-10 | 2012-09-19 | 北京正北元电器有限公司 | Overload alarm non-tripping device of thermomagnetic plastic housing circuit breaker |
| CN202268313U (en) * | 2011-09-17 | 2012-06-06 | 浙江电器开关有限公司 | Delayed-alarming and non-tripping molded case circuit breaker used for fire protection |
-
2018
- 2018-04-13 CN CN201810330710.9A patent/CN108321044B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203910702U (en) * | 2014-06-17 | 2014-10-29 | 浙江天正电气股份有限公司 | Plastic housing circuit breaker with thermal overload alarm non-tripping function |
| CN105007227A (en) * | 2015-06-15 | 2015-10-28 | 深圳市共进电子股份有限公司 | Router and packaging structure thereof |
| CN204857614U (en) * | 2015-08-24 | 2015-12-09 | 常熟开关制造有限公司(原常熟开关厂） | Moulded case circuit breaker with heat overload alarming function |
| CN205069536U (en) * | 2015-11-19 | 2016-03-02 | 巨邦电气集团有限公司 | Moulded case circuit breaker with hot function of not threading off of only reporting to police of transshipping |
| CN205911255U (en) * | 2016-07-22 | 2017-01-25 | 上海精益电器厂有限公司 | HM60 of circuit breaker 400 overload not trip gear that reports to police |
| CN208240596U (en) * | 2018-04-13 | 2018-12-14 | 法泰电器（江苏）股份有限公司 | Breaker of plastic casing overload-alarm non-tripping device |
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| Publication number | Publication date |
|---|---|
| CN108321044A (en) | 2018-07-24 |
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