CN213988453U - Resistance wire - Google Patents
Resistance wire Download PDFInfo
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- CN213988453U CN213988453U CN202120210814.3U CN202120210814U CN213988453U CN 213988453 U CN213988453 U CN 213988453U CN 202120210814 U CN202120210814 U CN 202120210814U CN 213988453 U CN213988453 U CN 213988453U
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- resistance wire
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- main body
- connecting portion
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Abstract
The utility model relates to a low voltage apparatus technical field specifically is the resistance wire, and it includes the resistance wire main part, the one end department fixedly connected with connecting portion of resistance wire main part, connecting portion are connected with the flexion, the resistance wire main part is connected with first weld part through connecting portion and flexion, the resistance wire main part is connected with the second weld part through connecting portion and flexion, the whole heliciform that is of resistance wire main part. The utility model has the advantages that: the resistance wire is made of Ni20/Cr80, is not fused for a long time under rated current, has moderate resistivity, has large heat productivity under certain constant current, enables a thermal bimetallic strip to act within a specified short time, and has strong high-temperature durability; the whole spiral that is, after the installation resistance wire main part, the resistance wire main part is greater than 1mm with other part clearances, and the holistic internal diameter of resistance wire main part is 2.75mm, and the clearance is big, when having guaranteed the radiating to guarantee the security performance of product and do not harm the casing.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field, especially resistance wire.
Background
The low-voltage electrical appliance is an element or equipment which can be manually or automatically switched on and off according to external signals and requirements so as to realize switching, control, protection, detection, transformation and regulation of circuits or non-electric objects. The control devices can be divided into two types, i.e., high-voltage control devices and low-voltage control devices, according to the working voltage of the control devices, which is bounded by alternating current 1200V and direct current 1500V. Generally, low-voltage electrical appliances can be divided into two categories, namely distribution electrical appliances and control electrical appliances, and are basic constituent elements of a complete set of electrical equipment. In industry, agriculture, traffic, national defense and electricity utilization departments of people, low-voltage power supply is mostly adopted, so the quality of electrical components directly influences the reliability of a low-voltage power supply system. Resistance wire is commonly used in low-voltage electrical appliances, and the resistance wire is an electrical element which generally converts electric energy into internal energy. Generally, the resistance of a metal increases as the temperature increases; elemental carbon, semiconductor, or electrolyte is reversed. The resistance value decreases as the temperature increases. Therefore, in a certain temperature range, the temperature change and the resistance value change are considered to be in a linear relation, and therefore the temperature change can be converted into the resistance value change.
The existing resistance wire in the low-voltage electric appliance has the following defects:
1. the resistance wire has low resistivity and small heat productivity, and can not meet the action time requirement of the thermal protector; 2. the resistance wire is easy to fuse at high temperature; 3. the resistance wire has generally poor high-temperature durability; 4. the internal volume of the thermal protector is small, and after the three groups of resistance wires are installed, the resistance wires are easy to damage the shell.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's shortcoming, provide the resistance wire.
The purpose of the utility model is realized through the following technical scheme: the resistance wire comprises a resistance wire main body, wherein one end of the resistance wire main body is fixedly connected with a connecting part, the connecting part is connected with a bending part, and the resistance wire main body is connected with a first welding part through the connecting part and the bending part;
the resistance wire main part is connected with the second welding part through connecting portion and flexion, the resistance wire main part is whole to be the heliciform, the resistance wire main part is greater than 1mm with other part clearances, 1 holistic internal diameter of resistance wire main part is 2.75 mm.
Optionally, the resistance wire main body is made of Ni20/Cr80, and the diameter of the resistance wire main body is 0.25-0.3 mm.
Optionally, the resistance wire main body is suitable for current of 1.5-2.5A.
Optionally, the resistance wire main body is made of Ni20/Cr80, the diameter of the resistance wire main body is 1.1-1.5mm, the melting point of the resistance wire main body is larger than 1200 ℃, the resistance wire main body is relatively high, the resistance wire main body is applied to a thermal protector product, the resistance wire does not fuse for a long time under rated current, the resistivity is moderate, and the heating value is large under certain constant current, so that the thermal bimetallic strip acts within a specified short time.
Optionally, the resistance wire body is suitable for 20-40A current.
Optionally, the length of the connecting portion is 2.5mm, and the lengths of the first welding portion and the second welding portion are 3 mm.
Optionally, the subsequent welding length of the first welding part and the second welding part is 1.7-2mm, and the interval angle between the first welding part and the second welding part is sixty degrees.
The utility model has the advantages of it is following:
1. the resistance wire is made of Ni20/Cr80, has a melting point of more than 1200 ℃ and is relatively high, is applied to a thermal protector product, cannot be fused for a long time under rated current, has moderate resistivity, generates large heat under certain constant current, and enables a thermal bimetallic strip to act within a specified short time, and has high-temperature durability.
2. This resistance wire wholly is the spiral, and after installation resistance wire main part 1, the resistance wire main part is greater than 1mm with other part clearances, and the holistic internal diameter of resistance wire main part 1 is 2.75mm, and the clearance is big, when having guaranteed the radiating, with the security performance of assurance product and not damaging the casing.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic front view of the structure of the present invention;
fig. 3 is a schematic side view of the present invention.
In the figure: 1-resistance wire main body, 2-connecting part, 3-bending part, 4-first welding part and 5-second welding part.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.
As shown in fig. 1-3, the resistance wire comprises a resistance wire main body 1, wherein one end of the resistance wire main body 1 is fixedly connected with a connecting part 2, the connecting part 2 is connected with a bending part 3, and the resistance wire main body 1 is connected with a first welding part 4 through the connecting part 2 and the bending part 3;
resistance wire main part 1 is connected with second welding part 5 through connecting portion 2 and flexion 3, and resistance wire main part 1 wholly is the heliciform, and resistance wire main part 1 is greater than 1mm with other part clearances, and the holistic internal diameter of resistance wire main part 1 is 2.75 mm.
As an optimal technical solution of the utility model: the resistance wire main body 1 is made of Ni20/Cr80, has a melting point of more than 1200 ℃, is relatively high, is applied to a thermal protector product, cannot be fused for a long time under rated current, has moderate resistivity, has a diameter of 0.25-0.3mm and is suitable for 1.5-2.5A current;
the resistance wire main body 1 is made of Ni20/Cr80, the melting point of the resistance wire main body is larger than 1200 ℃, the resistance wire main body is relatively high, the resistance wire main body is applied to a thermal protector product, the resistance wire main body is not fused for a long time under rated current, the resistivity is moderate, the heating value is large under certain constant current, so that a thermal bimetallic strip acts within a specified short time, the diameter of the resistance wire main body 1 is 1.1-1.5mm, and the resistance wire main body 1 is suitable for 20-40A current;
the length of connecting portion 2 is 2.5mm, and the length of first welding part 4 and second welding part 5 is 3mm, and the subsequent welding length of first welding part 4 and second welding part 5 is 1.7-2mm, and the interval angle of first welding part 4 and second welding part 5 is sixty degrees.
The working process of the utility model is as follows: the resistance wire main body 1 is installed through the first welding part 4, the second welding part 5, the connecting part 2 and the bending part 3, the resistance wire main body 1 is in a spiral shape, the melting point of the resistance wire main body is larger than 1200 ℃, the resistance wire main body is relatively high, the resistance wire main body is applied to a thermal protector product, the resistance wire main body cannot be fused for a long time under rated current, the resistivity is moderate, and under certain constant current, the heating quantity is large, so that the thermal bimetallic strip acts within a specified short time.
In conclusion, when the resistance wire is used, the melting point of the resistance wire is larger than 1200 ℃, the resistance wire is relatively high, the resistance wire is applied to a thermal protector product, the resistance wire is not fused for a long time under rated current, the resistivity is moderate, the heating quantity is large under certain constant current, so that a thermal bimetallic strip acts within a specified short time, meanwhile, the resistance wire has strong high-temperature durability and is spiral as a whole, after the resistance wire main body 1 is installed, the gap between the resistance wire main body 1 and other parts is larger than 1mm, the inner diameter of the resistance wire main body 1 is 2.75mm, the gap is large, the heat dissipation is ensured, and meanwhile, the safety performance of the product is ensured and the shell is not damaged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. Resistance wire, its characterized in that: the welding wire comprises a resistance wire main body (1), wherein one end of the resistance wire main body (1) is fixedly connected with a connecting part (2), the connecting part (2) is connected with a bending part (3), and the resistance wire main body (1) is connected with a first welding part (4) through the connecting part (2) and the bending part (3);
resistance wire main part (1) is connected with second welding part (5) through connecting portion (2) and flexion (3), resistance wire main part (1) wholly is the heliciform, resistance wire main part (1) is greater than 1mm with other part clearances, the holistic internal diameter of resistance wire main part (1) is 2.75 mm.
2. A resistance wire as claimed in claim 1, wherein: the resistance wire main body (1) is made of Ni20/Cr80, and the diameter of the resistance wire main body (1) is 0.25-0.3 mm.
3. A resistance wire as claimed in claim 2, wherein: the resistance wire main body (1) is suitable for current of 1.5-2.5A.
4. A resistance wire as claimed in claim 1, wherein: the resistance wire main body (1) is made of Ni20/Cr80, and the diameter of the resistance wire main body (1) is 1.1-1.5 mm.
5. A resistance wire according to claim 4, wherein: the resistance wire main body (1) is suitable for 20-40A current.
6. A resistance wire as claimed in claim 1, wherein: the length of connecting portion (2) is 2.5mm, the length of first welding portion (4) and second welding portion (5) is 3 mm.
7. A resistance wire as claimed in claim 1, wherein: the subsequent welding length of the first welding part (4) and the second welding part (5) is 1.7-2mm, and the interval angle between the first welding part (4) and the second welding part (5) is sixty degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120210814.3U CN213988453U (en) | 2021-01-26 | 2021-01-26 | Resistance wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120210814.3U CN213988453U (en) | 2021-01-26 | 2021-01-26 | Resistance wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213988453U true CN213988453U (en) | 2021-08-17 |
Family
ID=77252028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120210814.3U Active CN213988453U (en) | 2021-01-26 | 2021-01-26 | Resistance wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213988453U (en) |
-
2021
- 2021-01-26 CN CN202120210814.3U patent/CN213988453U/en active Active
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