CN108054727B - Surge protector and manufacturing method thereof - Google Patents
Surge protector and manufacturing method thereof Download PDFInfo
- Publication number
- CN108054727B CN108054727B CN201711459093.4A CN201711459093A CN108054727B CN 108054727 B CN108054727 B CN 108054727B CN 201711459093 A CN201711459093 A CN 201711459093A CN 108054727 B CN108054727 B CN 108054727B
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- temperature
- tubular
- temperature sensing
- foot
- nonlinear element
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- 230000001012 protector Effects 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000011540 sensing material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/044—Physical layout, materials not provided for elsewhere
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a surge protector and a manufacturing method thereof. The surge protector includes a nonlinear element and a temperature safety. The nonlinear element is provided with a tubular foot, the temperature insurance is provided with one or more temperature sensing feet, the tubular foot and the temperature sensing feet are made of metal, and at least one temperature sensing foot of the temperature insurance is inserted into the tubular foot and connected with the tubular foot. The invention adopts pipe type compression welding, and the temperature sensing feet of the temperature insurance are directly fixed by the pipe type feet of the nonlinear element to conduct heat. Compared with the traditional temperature insurance, the pin type structure is more convenient to fix, and the contact surface is increased to increase the lightning current tolerance capacity of the joint; compared with the traditional temperature insurance, the tubular structure is closer to the heating element (nonlinear element), most of the joints are directly connected, and the gaps in the tube are made of welding materials, so that the heat conduction speed is increased by direct heat conduction. Under the same test conditions, the measured temperature insurance fusing time of the pin type structure is less than 2/3 of the traditional structure time.
Description
Technical Field
The invention relates to the field of surge protection circuits, in particular to a surge protector and a manufacturing method thereof.
Background
The failure mode of the surge protector has two conditions of short circuit and open circuit, and the temperature safety 10 shown in fig. 1 is a general mode for connecting the surge protector, and the principle is that when continuous current passes through the nonlinear element 11, the nonlinear element 11 heats to enable the temperature sensing material connected to the connection point 12 to rise until the temperature sensing material is fused, so that the purpose that the surge protector is separated from a power grid is achieved.
As shown in fig. 2, the conventional temperature safety device is welded and fixed by means of the temperature sensing pins 101 of the temperature safety device 10 to the electrode pins 111 of the nonlinear element 11 (such as piezoresistor and discharge tube), and heat is conducted through the welding material. When the temperature rises, the temperature sensing pin 101 of the temperature safety 10 and the electrode pin 111 of the nonlinear element 11 are at risk of detachment along with the falling of the welding material.
Disclosure of Invention
In order to prevent the temperature sensing pin of the temperature safety from being separated from the electrode pin of the nonlinear element due to the falling of the welding material when the temperature safety is heated, the invention provides a surge protector and a manufacturing method thereof.
The invention is realized by adopting the following technical scheme: a surge protector comprising a nonlinear element and a temperature safety; the nonlinear element is provided with a tubular foot, the temperature insurance is provided with one or more temperature sensing feet, the tubular foot and the temperature sensing feet are made of metal, and at least one temperature sensing foot of the temperature insurance is inserted into the tubular foot and connected with the tubular foot.
As a further improvement of the scheme, the temperature sensing feet are welded with the tubular feet, and the gaps in the tubes of the tubular feet are filled with welding materials.
As a further development of the above solution, the nonlinear element is a varistor or a discharge tube.
As a further improvement of the above-mentioned aspect, the temperature safety has two or more temperature sensing legs, and the length of the temperature sensing leg inserted into the pipe-shaped leg is smaller than the length of the other temperature sensing legs.
As a further improvement of the scheme, the ratio of the inner diameter of the tubular foot to the outer diameter of the temperature sensing foot inserted into the tubular foot is 1.02-1.2:1.
As a further improvement of the above-described aspect, the tube-shaped leg is in direct contact with the temperature-sensing leg inserted therein.
As a further improvement of the above scheme, the nonlinear element further comprises a nonlinear element body and electrode pins, wherein the electrode pins and the tubular pins are connected to the nonlinear element body, and the ratio of the length of the electrode pins extending out of the nonlinear element body to the length of the temperature sensing pins located outside the tubular pins extending out of the nonlinear element body is 0.9-1.1:1.
The invention also provides a manufacturing method of the surge protector, which comprises the following steps:
providing a nonlinear element and a temperature safety, wherein the nonlinear element comprises a nonlinear element body and a tubular foot connected with the nonlinear element body, the temperature safety comprises a temperature safety body and one or more temperature sensing feet connected with the temperature safety body, and the tubular foot and the temperature sensing feet are made of metal;
and inserting at least one temperature sensing foot of the temperature insurance into the tubular foot of the nonlinear element body, so that the temperature sensing foot is contacted and connected with the tubular foot.
As a further improvement of the above-mentioned aspect, after the temperature sensing pin is inserted into the pipe-shaped pin, a welding material is filled in a space in the pipe of the pipe-shaped pin, and the temperature sensing pin and the pipe-shaped pin are welded and connected.
As a further improvement of the above-mentioned aspect, the temperature safety includes two or more temperature sensing legs, and the length of the temperature sensing leg inserted into the pipe-shaped leg is smaller than the length of the other temperature sensing legs.
The welding of the temperature feet of the original temperature insurance close to the nonlinear element (such as a piezoresistor MOV and a discharge tube) is changed into the tubular pressure welding, and the temperature-sensitive feet of the temperature insurance are directly fixed by the tubular feet of the nonlinear element to conduct heat. Compared with the traditional temperature insurance, the pin type structure is more convenient to fix, and the contact surface is increased to increase the lightning current tolerance capacity of the joint; compared with the traditional temperature insurance, the tubular structure is closer to the heating element (nonlinear element), most of the joints are directly connected, and the gaps in the tube are made of welding materials, so that the heat conduction speed is increased by direct heat conduction. Under the same test conditions, the measured temperature insurance fusing time of the pin type structure is less than 2/3 of the traditional structure time.
Drawings
Fig. 1 is a schematic diagram of a general connection of a temperature insurance connection surge protector.
Fig. 2 is a schematic diagram of a conventional temperature safety device.
Fig. 3 is a schematic diagram of the temperature insurance structure of the surge protector of embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of the temperature insurance structure of the surge protector of embodiment 2 of the present invention.
Fig. 5 is a schematic diagram of the temperature insurance structure of the surge protector of embodiment 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The surge protector of the present invention includes a nonlinear element and a temperature safety. The nonlinear element is provided with a tubular foot, the temperature insurance is provided with one or more temperature sensing feet, the tubular foot and the temperature sensing feet are made of metal, and at least one temperature sensing foot of the temperature insurance is inserted into the tubular foot and connected with the tubular foot. The invention directly fixes at least one temperature sensing foot of the temperature insurance by means of the tube foot of the nonlinear element of the surge protector.
The nonlinear element further comprises a nonlinear element body and electrode pins, wherein the electrode pins and the tubular pins are connected to the nonlinear element body, and the ratio of the length of the electrode pins extending out of the nonlinear element body to the length of the temperature sensing pins located outside the tubular pins (i.e. other temperature sensing pins not inserted into the tubular pins) extending out of the nonlinear element body is 0.9-1.1:1. The ratio of the inner diameter of the tube-shaped foot to the outer diameter of the temperature sensing foot inserted therein is 1.02-1.2:1. The inner diameter of the tubular foot is typically between 0.5 and 5 mm. After the temperature sensing pin is inserted into the tubular pin, a welding material is filled in a gap in the tube of the tubular pin, and the temperature sensing pin is welded with the tubular pin. When the temperature insurance comprises two or more temperature sensing feet, the length of the temperature sensing feet inserted into the tubular feet is smaller than the length of other temperature sensing feet as much as possible.
The nonlinear element may be a varistor or a gas discharge tube. The temperature sensing foot with tubular foot welded connection, the intraductal space of tubular foot adopts welding material to fill, and the junction of tubular foot and corresponding temperature sensing foot is mostly direct connection. The direct heat conduction accelerates the heat conduction speed, and under the same test condition, the measured temperature insurance fusing time of the pin type structure is less than 2/3 of the traditional structure time.
The manufacturing method of the surge protector is characterized in that: the method comprises the following steps:
providing a nonlinear element and a temperature safety, wherein the nonlinear element comprises a nonlinear element body and a tubular foot connected with the nonlinear element body, the temperature safety comprises a temperature safety body and one or more temperature sensing feet connected with the temperature safety body, and the tubular foot and the temperature sensing feet are made of metal;
and inserting at least one temperature sensing foot of the temperature insurance into the tubular foot of the nonlinear element body, so that the temperature sensing foot is contacted and connected with the tubular foot.
Example 1
Referring to fig. 3, the surge protector of embodiment 1 includes a nonlinear element 21 and a temperature protector. The nonlinear element 21 has a tubular leg 210 with one or more temperature-sensing legs 22, both the tubular leg 210 and the temperature-sensing legs 22 being made of metal. At least one temperature sensing leg 22 of the temperature safety is inserted into the pipe-shaped leg 210 and connected with the pipe-shaped leg 210. When the nonlinear element 21 adopts the piezoresistor of 34S, at least one temperature sensing pin 22 of the temperature insurance is directly fixed by virtue of the pipe-shaped pin 210 of the nonlinear element 21 of the surge protector. The connection between the tube-shaped leg 210 and the corresponding temperature sensing leg 22 is mostly direct connection, and the space in the tube of the tube-shaped leg 210 is filled with welding materials. The temperature insurance has two or more temperature sensing legs 22, and the length of the temperature sensing leg 22 inserted into the pipe-shaped leg 210 is smaller than the length of the other temperature sensing legs 22. The ratio of the inner diameter of the tube-shaped leg 210 to the outer diameter of the temperature sensing leg 22 inserted therein is 1.02-1.2:1, enabling the temperature sensing leg 22 to have a larger area in direct contact with the tube-shaped leg 210. The pipe-shaped leg 210 and the temperature sensing leg 22 inserted therein are in direct contact as much as possible.
Example 2
Referring to fig. 4, the surge protector of the present embodiment 2 is substantially the same as the surge protector of the embodiment 1, and the surge protector of the present embodiment 2 includes a nonlinear element 31 and a temperature protector. The nonlinear element 31 has a tubular leg 310 with one or more temperature-sensing legs 22, both the tubular leg 310 and the temperature-sensing legs 22 being made of metal.
The nonlinear element 31 of the surge protector employs 25D piezoresistors. The surge protector directly fixes at least one of the temperature sensing legs 22 of the temperature safety by means of the tube leg 310 of the nonlinear element 31. The connection of the tube-shaped leg 310 and the corresponding temperature sensing leg 22 is mostly direct connection, and the space in the tube of the tube-shaped leg 310 is filled with welding materials.
Example 3
Referring to fig. 5, the temperature safety of the surge protector of the present embodiment 3 employs an 80kA discharge tube. The surge protector comprises a nonlinear element 41 and a temperature safety. The nonlinear element 41 has a tubular leg 410 with one or more temperature-sensing legs 22, both the tubular leg 410 and the temperature-sensing legs 22 being made of metal.
The temperature safety is directly fixed by means of the tube-shaped leg 410 of the nonlinear element 41 to at least one of the temperature-sensing legs 22 of the temperature safety. The connection between the tube-shaped leg 410 and the corresponding temperature-sensing leg 22 is mostly direct connection, and the space in the tube of the tube-shaped leg 410 is filled with welding materials.
In summary, the original temperature safety temperature sensing foot is closely attached to MOV (piezoresistor) welding to be changed into the tubular pressure welding of the invention. The temperature-safety temperature-sensing pin is connected with the electrode pin of the MOV (piezoresistor) through the welding material, and the temperature-safety temperature-sensing pin is connected with the electrode pin of the MOV (piezoresistor) through the welding material.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. A surge protector comprising a nonlinear element and a temperature safety; the method is characterized in that: the nonlinear element is provided with a tubular foot, the temperature insurance is provided with one or more temperature sensing feet, the tubular foot and the temperature sensing feet are made of metal, at least one temperature sensing foot of the temperature insurance is inserted into the tubular foot, the length of the temperature sensing foot inserted into the tubular foot is smaller than that of other temperature sensing feet, the temperature sensing foot is connected with the tubular foot, a gap in a tube of the tubular foot is filled with welding materials, and the ratio of the inner diameter of the tubular foot to the outer diameter of the temperature sensing foot inserted into the tubular foot is 1.02-1.2:1.
2. The surge protector of claim 1, wherein: the nonlinear element is a varistor, a gap or a discharge tube.
3. The surge protector of claim 1, wherein: the tube-shaped leg is in direct contact with the temperature sensing leg inserted therein.
4. The surge protector of claim 1, wherein: the nonlinear element further comprises a nonlinear element body and electrode pins, wherein the electrode pins and the tubular pins are connected to the nonlinear element body, and the ratio of the length of the electrode pins extending out of the nonlinear element body to the length of the temperature sensing pins located outside the tubular pins extending out of the nonlinear element body is 0.9-1.1:1.
5. A method of manufacturing a surge protector device, comprising: the method comprises the following steps:
providing a nonlinear element and a temperature safety, wherein the nonlinear element comprises a nonlinear element body and a tubular foot connected with the nonlinear element body, the temperature safety comprises a temperature safety body and one or more temperature sensing feet connected with the temperature safety body, and the tubular foot and the temperature sensing feet are made of metal;
inserting at least one temperature sensing foot of the temperature insurance into a tubular foot of the nonlinear element body, so that the temperature sensing foot is contacted and connected with the tubular foot; the length of the temperature sensing feet inserted into the tubular feet is smaller than that of other temperature sensing feet, and the ratio of the inner diameter of the tubular feet to the outer diameter of the temperature sensing feet inserted into the tubular feet is 1.02-1.2:1;
after the temperature sensing pin is inserted into the tubular pin, a welding material is filled in a gap in the tube of the tubular pin, and the temperature sensing pin is welded with the tubular pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711459093.4A CN108054727B (en) | 2017-12-28 | 2017-12-28 | Surge protector and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711459093.4A CN108054727B (en) | 2017-12-28 | 2017-12-28 | Surge protector and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108054727A CN108054727A (en) | 2018-05-18 |
| CN108054727B true CN108054727B (en) | 2024-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711459093.4A Active CN108054727B (en) | 2017-12-28 | 2017-12-28 | Surge protector and manufacturing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN108054727B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004293663A (en) * | 2003-03-27 | 2004-10-21 | Mitsui Chemicals Inc | Terminal pin of electric fusion joint, and electrode for pin attachment of the terminal pin |
| CN101685693A (en) * | 2008-09-22 | 2010-03-31 | 安阳安科电器股份有限公司 | Surge protector |
| CN104505817A (en) * | 2015-01-13 | 2015-04-08 | 四川中光防雷科技股份有限公司 | Miniaturized high-reliability surge protection device |
| CN204695887U (en) * | 2015-06-03 | 2015-10-07 | 厦门赛尔特电子有限公司 | A kind of Thermal protection piezo-resistance and composition element thereof |
| CN105322521A (en) * | 2014-05-29 | 2016-02-10 | 孙巍巍 | Novel surge protector |
| CN106175925A (en) * | 2016-08-04 | 2016-12-07 | 上海澳华光电内窥镜有限公司 | A kind of insertable neutral electrode and electrode assemblie |
| CN106849046A (en) * | 2017-04-17 | 2017-06-13 | 四川中光防雷科技股份有限公司 | A kind of power source surge protector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9431158B2 (en) * | 2014-08-19 | 2016-08-30 | Longke Electronics (Huiyang) Co., Ltd. | Barrel-shaped fireproof and explosion-proof surge protection device with over-temperature protection function |
-
2017
- 2017-12-28 CN CN201711459093.4A patent/CN108054727B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004293663A (en) * | 2003-03-27 | 2004-10-21 | Mitsui Chemicals Inc | Terminal pin of electric fusion joint, and electrode for pin attachment of the terminal pin |
| CN101685693A (en) * | 2008-09-22 | 2010-03-31 | 安阳安科电器股份有限公司 | Surge protector |
| CN105322521A (en) * | 2014-05-29 | 2016-02-10 | 孙巍巍 | Novel surge protector |
| CN104505817A (en) * | 2015-01-13 | 2015-04-08 | 四川中光防雷科技股份有限公司 | Miniaturized high-reliability surge protection device |
| CN204695887U (en) * | 2015-06-03 | 2015-10-07 | 厦门赛尔特电子有限公司 | A kind of Thermal protection piezo-resistance and composition element thereof |
| CN106175925A (en) * | 2016-08-04 | 2016-12-07 | 上海澳华光电内窥镜有限公司 | A kind of insertable neutral electrode and electrode assemblie |
| CN106849046A (en) * | 2017-04-17 | 2017-06-13 | 四川中光防雷科技股份有限公司 | A kind of power source surge protector |
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| Publication number | Publication date |
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| CN108054727A (en) | 2018-05-18 |
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