CN113299448A - Piezoresistor for surge protector and surge protector - Google Patents
Piezoresistor for surge protector and surge protector Download PDFInfo
- Publication number
- CN113299448A CN113299448A CN202110478877.1A CN202110478877A CN113299448A CN 113299448 A CN113299448 A CN 113299448A CN 202110478877 A CN202110478877 A CN 202110478877A CN 113299448 A CN113299448 A CN 113299448A
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- electrode
- varistor
- surge protector
- connecting piece
- pin
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- 230000001012 protector Effects 0.000 title claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 27
- 239000000155 melt Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 description 11
- 238000013519 translation Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 208000025274 Lightning injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
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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
- H01H71/02—Housings; Casings; Bases; Mountings
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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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a piezoresistor for a surge protector and the surge protector, wherein the piezoresistor comprises a piezoresistor main body, a first electrode and a second electrode which are arranged on the piezoresistor main body; the first electrode is integrally formed with a first pin for plug connection of the surge protector, the second electrode is used for welding with an electrode connecting piece of the surge protector, and the electrode connecting piece is provided with a second pin for plug connection of the surge protector. The technical scheme provided by the invention can reduce the welding process of the surge protector in the production process, and improve the reliability and the production efficiency of the product.
Description
Technical Field
The invention relates to the technical field of overvoltage and overcurrent protection, in particular to a piezoresistor for a surge protector and the surge protector.
Background
Lightning is one of ten natural disasters. With the progress of technology, the equipment is more intelligent, the integration level is higher and higher, and the equipment is more sensitive to transient overvoltage, namely surge, caused by lightning. In addition, power surges can occur from the start and stop of high power equipment. The surge protector can prevent the surge from damaging equipment, and is widely applied to the industries of communication, building, rail transit, electric power, new energy, petrochemical industry and the like. When the peak current or voltage is generated in the circuit of the electric loop due to lightning stroke or external interference, the surge protector can be conducted in a very short time to release the current and limit the voltage to a lower level, so that damage of the surge to other equipment in the loop is avoided.
A common component in surge protectors used in power distribution systems is a varistor. The varistor has a very high resistance under normal operating conditions, corresponding to an open circuit condition, and when the voltage in the circuit exceeds a predetermined value, its resistance drops sharply, being in a conductive state, allowing the magnitude of the current to be discharged, limiting the overvoltage level.
However, after a long time of use, the varistor is gradually aged, the leakage current is gradually increased, and the heat balance is broken, resulting in a continuous rise in the temperature of the product. In order to prevent the varistor from causing a fire accident due to overheating, a thermal protection tripping device is generally arranged in the surge protector for disconnecting the varistor from the circuit when the temperature rises, and after the varistor is disconnected from the circuit, the surge protector is failed, and the protection effect on equipment is lost. And the failed surge protection device is provided with a state indicator to prompt maintenance personnel to replace the surge protection device in time. In some unattended occasions, a remote signaling device is required to be designed to realize remote indication of the failure state of the surge protector.
At present, the existing surge protection device has a long production period and low product reliability due to a complex internal structure.
Disclosure of Invention
The invention aims to solve the problems of complex internal structure, low reliability and long production period of the conventional surge protector.
In order to achieve the above object, the present invention provides a varistor for a surge protector, the varistor comprising a varistor main body and a first electrode and a second electrode provided on the varistor main body;
the first electrode is integrally formed with a first pin for plug connection of the surge protector, the second electrode is used for welding with an electrode connecting piece of the surge protector, and the electrode connecting piece is provided with a second pin for plug connection of the surge protector.
Preferably, the first electrode is an integrally formed sheet structure, the first electrode includes a connecting portion attached to the varistor main body and an extending portion extending out of the varistor main body, and the first pin is formed on the extending portion.
Preferably, the connecting portion of the first electrode is an annular sheet body which is attached to the main varistor body, the protruding portion extends from the annular sheet body, and an end portion of the protruding portion is bent in a direction away from the tail end to form the first pin.
Preferably, the protruding part has two parallel bends with opposite directions at positions close to the first pins.
Preferably, the second electrode is of an integrally formed sheet structure, the second electrode is attached to the second side surface of the varistor main body, a welding portion protruding towards the second side surface far away from the varistor main body is formed in the second electrode in a bent mode, and the electrode connecting piece is welded to the welding portion.
Preferably, the second electrode is an annular sheet.
According to another aspect of the present invention, there is also provided a surge protector device comprising a carrier, an electrode connection member and a varistor as described above;
the bearing frame comprises a mounting plate, electrode through holes penetrating through two sides are formed in the mounting plate, the piezoresistor is mounted on the first side of the mounting plate, the electrode connecting piece is mounted on the second side of the mounting plate, one end of the electrode connecting piece is welded with the second electrode of the piezoresistor through the electrode through holes, and the other end of the electrode connecting piece is provided with a second pin; wherein the first prong of the varistor and the second prong on the electrode connector protrude out of the carrier for plugging of the surge protector;
the surge protector still includes tripping device, tripping device installs the second side of mounting panel, tripping device sets up to, electrode connecting piece with when the second electrode welded fastening, tripping device is in the first state electrode connecting piece with when the welding between the second electrode melts, tripping device follows first state automatic switch is to the second state.
In the technical scheme provided by the invention, the first pin is formed on the first electrode of the piezoresistor, so that extra welding points and connecting parts can be reduced, the welding process can be reduced, and the production efficiency and the reliability of products can be improved.
Drawings
FIG. 1 is a schematic diagram of a structure of a piezoresistor according to an embodiment of the present invention;
FIG. 2 is a schematic view of the varistor from the other side;
FIG. 3 is a schematic view of a carrier;
FIG. 4 is a schematic view of the carrier from the other side;
FIG. 5 is a schematic view of a configuration in which the piezoresistors are mounted on a carrier;
fig. 6 is a schematic structural view of the electrode connecting member and the trip mechanism mounted on the carrier (the trip mechanism is in a first state);
fig. 7 is a schematic view of the electrode connecting member and the trip mechanism mounted on the carrier (the trip mechanism is in the second state).
Description of reference numerals:
1-a shell; 2-a bearing frame; 21-mounting a plate; 211-electrode vias; 22-a first support; 23-a second support; 24-a rotating shaft; 25-spring connection; 3-a voltage dependent resistor; 31-a varistor body; 32-a first electrode; 321-a connecting part; 322-first pin; 33-a second electrode; 331-a weld; 4-an electrode connection; 41-second pins; 42-welding the ends; 5-a rotating member; 6-potential storage spring.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may also be otherwise oriented, such as by rotation through 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
The invention provides a piezoresistor used for surge protector, as shown in fig. 1 and fig. 2, the piezoresistor 3 includes the varistor body 31 and first electrode 32 and second electrode 33 set up on the varistor body 31;
the first electrode 32 is integrally formed with a first pin 322 for inserting and pulling the surge protector, the second electrode 33 is welded to the electrode connector 4 of the surge protector, and the electrode connector 4 is provided with a second pin 41 for inserting and pulling the surge protector.
In the technical scheme provided by the invention, the first electrode 32 of the piezoresistor 3 is provided with the first pin 322, and compared with the mode of welding the pins on the electrode of the piezoresistor in the prior art, the additional welding points and connecting parts can be reduced, so that the welding process can be reduced, and the production efficiency and the reliability of products can be improved.
In a preferred embodiment, as shown in fig. 1, the first electrode 32 is an integrally formed sheet structure, and the first electrode 32 includes a connecting portion 321 attached to the varistor main body 31 and an extending portion extending from the varistor main body 31, and the extending portion is formed with the first pin 322.
The connecting portion 321 of the first electrode 32 is a ring-shaped sheet body attached to the varistor main body 31, the extending portion extends from the ring-shaped sheet body, and an end of the extending portion is bent in a direction away from the terminal to form the first pin 322.
To increase the elasticity of the first pin 322, the protruding portion has two parallel and opposite bends at positions close to the first pin 322, such as bends at a and B in fig. 1.
As shown in fig. 2, the second electrode 33 is an integrally formed sheet, the second electrode 33 is attached to the second side of the varistor main body 31, and the second electrode 33 is preferably an annular sheet. The second electrode 33 is bent to form a welding portion 331 protruding in a direction away from the second side surface of the varistor main body 31, and the electrode connector 4 is welded to the welding portion 331.
It will be understood by those skilled in the art that the structures of the first electrode 32 and the second electrode 33 are not limited to those in the present embodiment, and other structures of the first electrode 32 having the pin integrally formed thereon may be used.
According to another aspect of the present invention, there is also provided a surge protector device comprising a carrier 2, a pole attachment 4 and a varistor 3 as described above;
in one embodiment, as shown in fig. 3 and 4, the carriage 2 comprises a mounting plate 21, and the mounting plate 21 is provided with an electrode via 211 passing through two sides, wherein fig. 3 shows a first side of the mounting plate 21 and fig. 4 shows a second side of the mounting plate 21.
As shown in fig. 5, the varistor 3 is mounted on the first side of the mounting board 21 with the first electrode 32 facing outward, the second electrode 33 facing the mounting board 21, and the soldering portion 331 on the second electrode 33 corresponding to the electrode via hole 211. As shown in fig. 6 and 7, the electrode connecting member 4 is mounted on the second side of the mounting plate 21, the welding end 42 of the electrode connecting member 4 is welded with the welding portion 331 of the second electrode 33 of the varistor 3 through the electrode via hole 211, and the other end is provided with a second pin 41; wherein the first pins 322 of the piezoresistor 3 and the second pins 41 on the electrode connecting piece 4 protrude out of the carrier 2 for the insertion of a surge protector.
In this embodiment, the first pin 322 and the second pin 41 are respectively bent to a direction away from the terminal ends to form slots, the carrier 2 is provided with a first supporting body 22 and a second supporting body 22 (refer to fig. 3 and 4), the first supporting body 22 is inserted into the slot of the first pin 322, and the second supporting body 23 is inserted into the slot of the second pin 41, so as to respectively increase the stability of the first pin 322 and the second pin 41 during plugging.
The surge protector further comprises a tripping mechanism, the tripping mechanism is installed on the second side of the mounting plate 21, the tripping mechanism is set to be in a first state when the electrode connecting piece 4 is fixedly welded with the second electrode 33, and when the welding between the electrode connecting piece 4 and the second electrode 33 is melted, the tripping mechanism is automatically switched to a second state from the first state.
In the present embodiment, as shown in fig. 6 and 7, the trip mechanism includes a rotor 5 rotatably mounted on the second side of the mounting plate 21 and an energizing spring 6 provided between the rotor 5 and the carrier 2. The rotor 5 is rotatably mounted on the rotating shaft 24 of the mounting plate 21, and one end of the potential storage spring 6 is connected to the rotor 5 and the other end is connected to the spring connecting portion 25 of the carriage 2.
When the electrode connecting piece 4 and the second electrode 33 are in a welding state, the welding of the electrode connecting piece 4 and the second electrode 33 limits the rotating body 5 at a first position, and the potential accumulating spring 6 is kept in a compressed or stretched potential accumulating state; when the solder between the electrode connecting piece 4 and the second electrode 33 is melted, the potential accumulating spring 6 drives the rotating piece 5 to rotate to the second position through the elastic force, so that the electrode connecting piece 4 and the second electrode 33 are separated through the rotating piece 5.
Fig. 6 shows the position in which rotor 5 is restrained when electrode connecting element 4 and second electrode 33 are welded together, with potential accumulating spring 6 in the tensioned state between rotor 5 and carrier 2, although it is also possible to arrange potential accumulating spring 6 in the contracted state, for example, by changing the manner in which potential accumulating spring 6 is mounted. When the varistor 3 is deteriorated and short-circuited, the temperature is gradually increased to melt the solder between the second electrode 33 of the varistor and the electrode connecting member 4, and the restriction of the rotor 5 is removed, and the rotor 5 is rotated about the rotating shaft 24 by the elastic force of the potential accumulating spring 6 in the stretched state from the first position to the second position, as shown in fig. 7.
It will be understood by those skilled in the art that the tripping mechanism is not limited to the above-described structure in the present embodiment, and other tripping mechanisms capable of changing state to isolate the electrode connector 4 from the second electrode 33 when the solder between the electrode connector 4 and the second electrode 33 melts may be used, for example, a translation member capable of translating relative to the carrier 2 may be provided, a spring may be provided between the translation member and the carrier 2, the translation member may be limited to a first position when the electrode connector 4 and the second electrode 33 are in a welding state, the spring may be in a compressed or extended potential accumulation state, and the translation member may move to the welding portion between the electrode connector 4 and the second electrode 33 under the elastic force of the spring to isolate the welding portion when the welding melts.
The surge protector device furthermore comprises a housing 1, the carrier 2, the varistor 3 and the electrode connection 4 being situated in the housing 1.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (7)
1. A varistor for a surge protector, said varistor comprising a varistor body and first and second electrodes disposed on said varistor body;
the first electrode is integrally formed with a first pin for plug connection of the surge protector, the second electrode is used for welding with an electrode connecting piece of the surge protector, and the electrode connecting piece is provided with a second pin for plug connection of the surge protector.
2. The varistor of claim 1, wherein said first electrode is an integrally formed sheet structure, said first electrode comprising a connection portion for engaging and connecting to said varistor body and an extension portion extending from said varistor body, said extension portion having said first pin formed thereon.
3. The varistor of claim 2, wherein said connection portion of said first electrode is a ring-shaped piece attached to said varistor body, said extension extends from said ring-shaped piece, and an end of said extension is bent away from said terminal end to form said first pin.
4. A varistor according to claim 2, wherein said extension has two parallel and oppositely directed bends at a location adjacent said first pin.
5. The piezoresistor according to any one of claims 1-4, wherein the second electrode is an integrally formed sheet structure, the second electrode is attached to the second side of the piezoresistor main body, a welding part protruding towards the second side far away from the piezoresistor main body is formed on the second electrode in a bending mode, and the electrode connecting piece is welded on the welding part.
6. The varistor of claim 5, wherein said second electrode is an annular sheet.
7. A surge protector device, characterized in that it comprises a carrier, an electrode connection and a varistor according to any of claims 1-6;
the bearing frame comprises a mounting plate, electrode through holes penetrating through two sides are formed in the mounting plate, the piezoresistor is mounted on the first side of the mounting plate, the electrode connecting piece is mounted on the second side of the mounting plate, one end of the electrode connecting piece is welded with the second electrode of the piezoresistor through the electrode through holes, and the other end of the electrode connecting piece is provided with a second pin; wherein the first prong of the varistor and the second prong on the electrode connector protrude out of the carrier for plugging of the surge protector;
the surge protector still includes tripping device, tripping device installs the second side of mounting panel, tripping device sets up to, electrode connecting piece with when the second electrode welded fastening, tripping device is in the first state electrode connecting piece with when the welding between the second electrode melts, tripping device follows first state automatic switch is to the second state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478877.1A CN113299448A (en) | 2021-04-30 | 2021-04-30 | Piezoresistor for surge protector and surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478877.1A CN113299448A (en) | 2021-04-30 | 2021-04-30 | Piezoresistor for surge protector and surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113299448A true CN113299448A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110478877.1A Pending CN113299448A (en) | 2021-04-30 | 2021-04-30 | Piezoresistor for surge protector and surge protector |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507744A (en) * | 2017-10-11 | 2017-12-22 | 成都兴业雷安电子有限公司 | A kind of surge protector |
| CN107516886A (en) * | 2017-09-19 | 2017-12-26 | 广西新全通电子技术有限公司 | A kind of quick disjunction preventing arc and arc extinction type surge protection device and its application |
| CN209844547U (en) * | 2019-05-05 | 2019-12-24 | 成都标定科技有限责任公司 | 10kA single-phase PCB type power supply surge protector |
| CN212322756U (en) * | 2020-07-10 | 2021-01-08 | 常州市创捷防雷电子有限公司 | Piezoresistor for multi-pulse surge protector |
| CN212649865U (en) * | 2020-07-22 | 2021-03-02 | 常州市创捷防雷电子有限公司 | Board carries electric surge protector |
| CN214672052U (en) * | 2021-04-30 | 2021-11-09 | 上海辰竹防雷科技有限公司 | Piezoresistor for surge protector and surge protector |
-
2021
- 2021-04-30 CN CN202110478877.1A patent/CN113299448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516886A (en) * | 2017-09-19 | 2017-12-26 | 广西新全通电子技术有限公司 | A kind of quick disjunction preventing arc and arc extinction type surge protection device and its application |
| CN107507744A (en) * | 2017-10-11 | 2017-12-22 | 成都兴业雷安电子有限公司 | A kind of surge protector |
| CN209844547U (en) * | 2019-05-05 | 2019-12-24 | 成都标定科技有限责任公司 | 10kA single-phase PCB type power supply surge protector |
| CN212322756U (en) * | 2020-07-10 | 2021-01-08 | 常州市创捷防雷电子有限公司 | Piezoresistor for multi-pulse surge protector |
| CN212649865U (en) * | 2020-07-22 | 2021-03-02 | 常州市创捷防雷电子有限公司 | Board carries electric surge protector |
| CN214672052U (en) * | 2021-04-30 | 2021-11-09 | 上海辰竹防雷科技有限公司 | Piezoresistor for surge protector and surge protector |
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Inventor after: Wang Heng Inventor after: Liu Zhenhui Inventor after: Li Zhuang Inventor after: Chen Keqi Inventor before: Zhai Chunpo Inventor before: Wang Heng Inventor before: Liu Zhenhui Inventor before: Li Zhuang Inventor before: Chen Keqi |
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Effective date of registration: 20230824 Address after: Room 702, Building 5, No. 518 Xinzhuan Road, Songjiang District, Shanghai Applicant after: SHANGHAI CHENZHU INSTRUMENT Co.,Ltd. Address before: 201602 Room 204, 2nd floor, building 4, 1398 Xinsong Road, Xinqiao Town, Songjiang District, Shanghai Applicant before: Shanghai chenzhu Lightning Protection Technology Co.,Ltd. Applicant before: SHANGHAI CHENZHU INSTRUMENT Co.,Ltd. |