CN211088166U - Anti-lightning-stroke insulating and voltage-resisting temperature protector - Google Patents

Abstract

The utility model belongs to the technical field of the temperature protector, especially, relate to an anti thunderbolt temperature protector that insulating withstand voltage, including having the installation casing that holds the chamber, being located hold the bimetallic strip of intracavity and penetrate hold the first wire and the second wire in chamber, the one end of bimetallic strip with first wire fixed connection, the other end of bimetallic strip with second wire meltdown connects, the bimetallic strip sets up to the arc, the bimetallic strip is including being located the inboard first sheetmetal of arc and being located the second sheetmetal in the arc outside, the coefficient of thermal expansion of first sheetmetal is higher than the coefficient of thermal expansion of second sheetmetal. Compared with the prior art, the utility model discloses have anti thunderbolt effect to can bear higher insulating withstand voltage.

Description

A kind of temperature protector with resistance to lightning strike, insulation and voltage resistance

technical field

The utility model belongs to the technical field of temperature protectors, in particular to a temperature protector with lightning strike resistance, insulation and voltage resistance.

Background technique

A thermal fuse, also called a thermal fuse, is a temperature-sensing circuit cut-off device. Thermal fuses can sense the overheating generated during the abnormal operation of electrical and electronic products, thereby cutting off the circuit to avoid the occurrence of fire.

Some thermal fuses on the market are composed of lead wires, a thermal fuse that can be melted at a specified temperature, and an insulating housing. When the operating temperature is reached, the thermal fuse is blown, thereby cutting off the circuit. However, the thermal fuse in the thermal fuse is very thin and cannot withstand high lightning strikes. In order to improve the lightning strike capability, the temperature fuse is thickened in the prior art. However, due to the limited space inside the insulating housing, when the fuse is thickened and the fuse is blown, the disconnection distance between the fuses is not enough. It can withstand high insulation withstand voltage, or when subjected to secondary lightning strikes, the product will produce fire or even explode.

Utility model content

The purpose of the utility model is: aiming at the deficiencies of the prior art, to provide a temperature protector with anti-lightning strike insulation and voltage resistance, which has the function of anti-lightning strike and can withstand higher insulation and voltage resistance.

In order to achieve the above object, the utility model adopts the following technical solutions:

A temperature protector with resistance to lightning strike, insulation and pressure resistance, comprising a mounting shell with an accommodating cavity, a bimetallic sheet located in the accommodating cavity, and a first wire and a second wire penetrating the accommodating cavity, the dual One end of the metal sheet is fixedly connected to the first wire, and the other end of the bimetallic sheet is fusible connected to the second wire, the bimetallic sheet is arranged in an arc shape, and the bimetallic sheet includes a The first metal sheet on the inner side and the second metal sheet on the outer side of the arc, the thermal expansion coefficient of the first metal sheet is higher than the thermal expansion coefficient of the second metal sheet.

The temperature protector of the utility model adopts a bimetal sheet, which can withstand higher lightning strikes, and will not generate fire when it is subjected to secondary lightning strikes, and has better anti-lightning performance than traditional thermal fuses. Moreover, when the utility model is in use, when the received external temperature reaches a specific fusing temperature, the connection between the bimetallic sheet and the second wire is fused, and the bimetallic sheet is released. Since the bimetal sheet is pressed together by two metal sheets with different thermal expansion coefficients, when heated, the bimetal sheet as a whole will bend to the side with the smaller thermal expansion coefficient, and the second metal sheet with the smaller thermal expansion coefficient in the bimetal sheet It is located on the outside of the arc, so the bimetal will gradually straighten and bounce, which increases the insulation distance and has a high insulation withstand voltage. Therefore, the temperature protector of the present utility model has good anti-lightning strike and insulation withstand voltage functions.

As an improvement of the temperature protector of the present invention, the thermal expansion coefficient of the first metal sheet is 4*10 ^-6 /°C to 30*10 ^-6 /°C.

As an improvement of the temperature protector for lightning strike resistance, insulation and voltage resistance of the present invention, the thermal expansion coefficient of the second metal sheet is less than 3*10 ^-6 /°C.

As an improvement of the temperature protector with resistance to lightning strike, insulation and voltage resistance of the present invention, the width of the first metal sheet and the second metal sheet are the same.

As an improvement of the temperature protector for lightning strike resistance, insulation and voltage resistance of the present invention, one end of the bimetallic sheet is directly welded to the first wire, and the other end of the bimetallic sheet is connected to the first wire through a fusible alloy. The second wire is welded. One end of the bimetallic sheet bent into an arc is fixed on the first wire by spot welding, even if it is heated, and the other end of the bimetallic sheet is fixed on the second wire by welding with a corresponding specification of fusible alloy. When the use temperature reaches the melting temperature of the fusible alloy, the solder joint melts, releasing one end of the bimetallic sheet, so that one end of the bimetallic sheet can move freely.

As an improvement of the temperature protector for lightning strike resistance, insulation and voltage resistance of the present invention, the melting temperature of the fusible alloy is 80-500°C. The fusing temperature of the fusible alloy determines the fusing temperature of the temperature protector. For example, if a temperature protector with a temperature of 150°C needs to be made, a 150°C fuse is used for the fusible alloy used for welding. When the temperature it bears reaches 150°C, the solder joint will melt, releasing one end of the bimetal, so that the One end of the metal sheet can move freely.

As an improvement of the temperature protector with resistance to lightning strike, insulation and pressure of the present invention, the installation casing includes a casing and a base, and the casing is clamped with the base to form the accommodating cavity. The sealing of the relevant internal components of the temperature protector is ensured through the cooperation of the shell and the base.

As an improvement of the temperature protector with resistance to lightning strike, insulation and pressure of the present invention, each side of the base is provided with a convex block, and the casing is provided with a groove matching the convex block. Adopting the clamping method in which the convex block and the groove are matched can effectively prevent the shell and the base from falling off.

As an improvement of the temperature protector of the present invention, the base is provided with two threading holes, and the first wire and the second wire are respectively passed through the threading holes. into the receiving cavity. This arrangement makes the structure more compact and reliable.

As an improvement of the temperature protector with lightning resistance, insulation and voltage resistance of the present invention, one end of the first wire connected to the bimetallic sheet and one end of the second wire connected to the bimetallic sheet are fixed to the casing. This arrangement makes the structure more stable and reliable.

The beneficial effects of the present invention are as follows: the present invention provides a temperature protector with resistance to lightning strikes, insulation and pressure resistance, comprising a mounting shell with an accommodating cavity, a bimetallic sheet located in the accommodating cavity, and a bimetallic sheet penetrating into the accommodating cavity. The first wire and the second wire, one end of the bimetal is fixedly connected to the first wire, the other end of the bimetal is fusible connected to the second wire, and the bimetal is set to An arc shape, the bimetallic sheet includes a first metal sheet located inside the arc shape and a second metal sheet located outside the arc shape, and the thermal expansion coefficient of the first metal sheet is higher than that of the second metal sheet. Compared with the prior art, the utility model has the function of anti-lightning and can withstand higher insulation withstand voltage.

Description of drawings

FIG. 1 is a schematic structural diagram of the temperature protector when the bimetallic sheet is not popped open in the present invention.

FIG. 2 is a schematic structural diagram of the bimetallic sheet in the present invention when it is not popped open.

FIG. 3 is a schematic structural diagram of the temperature protector after the bimetallic sheet is ejected in the present invention.

FIG. 4 is a schematic structural diagram of the bimetal strip in the present invention after it has been ejected.

Among them: 1-installation shell, 2-first wire, 3-second wire, 4-bimetal sheet, 5-fusible alloy, 10-accommodating cavity, 11-shell, 12-base, 41-first metal Sheet, 42-second metal sheet, 121-bump, 122-thread hole.

Detailed ways

As used in the specification and claims, certain terms are used to refer to particular components. It should be understood by those skilled in the art that hardware manufacturers may refer to the same component by different nouns. The description and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as a criterion for distinguishing. As mentioned in the entire specification and claims, "comprising" is an open-ended term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range, and basically achieve the technical effect.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. The orientation or positional relationship shown in the figures is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations of the present invention.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The present utility model will be further described in detail below in conjunction with the accompanying drawings, but it is not intended to limit the present utility model.

As shown in FIGS. 1 to 4 , a temperature protector with insulation and pressure resistance against lightning strikes includes a mounting housing 1 having an accommodating cavity 10 , a bimetal 4 located in the accommodating cavity 10 , and a first penetrating cavity 10 . The wire 2 and the second wire 3, one end of the bimetal 4 is fixedly connected to the first wire 2, and the other end of the bimetal 4 is fusible connected to the second wire 3. The bimetal 4 is arranged in an arc shape, and the bimetal 4 includes a first metal sheet 41 on the inner side of the arc and a second metal sheet 42 on the outer side of the arc. The thermal expansion coefficient of the first metal sheet 41 is higher than that of the second metal sheet 42.

Preferably, the thermal expansion coefficient of the first metal sheet 41 is 4*10 ^-6 /°C to 30*10 ^-6 /°C. Specifically, the first metal sheet 41 can be selected from CuZn30 alloy.

Preferably, the thermal expansion coefficient of the second metal sheet 42 is less than 3*10 ^-6 /°C. Specifically, the second metal sheet 42 can be selected from FeNi36 iron-nickel alloy.

Preferably, the widths of the first metal sheet 41 and the second metal sheet 42 are the same.

Preferably, one end of the bimetal 4 is directly welded to the first wire 2 , and the other end of the bimetal 4 is welded to the second wire 3 through a fusible alloy 5 .

Preferably, the melting temperature of the fusible alloy 5 is 80-500°C.

Preferably, the installation housing 1 includes an outer shell 11 and a base 12 , and the outer shell 11 is clamped with the base 12 to form a accommodating cavity 10 .

Preferably, a protrusion 121 is provided on both sides of the base 12 , and a groove (not shown) matching the protrusion 121 is provided on the housing 1 .

Preferably, the base 12 is provided with two threading holes 122 , and the first wire 2 and the second wire 3 are respectively inserted into the accommodating cavity 10 through the threading holes 122 .

Preferably, one end of the first wire 2 connected to the bimetal 4 and one end of the second wire 3 connected to the bimetal 4 are fixed to the casing 11 .

In use, when the received external temperature reaches a specific fusing temperature, the connection between the bimetal 4 and the second wire 3 is fused, and the bimetal 4 is released. Since the bimetal sheet 4 is pressed together by two metal sheets with different thermal expansion coefficients, when heated, the bimetal sheet 4 as a whole will bend to the side with the smaller thermal expansion coefficient, and the bimetal sheet 4 with the smaller thermal expansion coefficient will bend to the side with the smaller thermal expansion coefficient. The two metal sheets 42 are located on the outer side of the arc, therefore, the bimetal sheets 4 are gradually straightened and bounced up, thereby increasing the insulation distance.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as the exclusion of other embodiments, but the available Various other combinations, modifications and environments, and can be modified from the above teachings or skill or knowledge in the relevant fields, within the scope of the inventive concept described herein. However, modifications and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all fall within the protection scope of the appended claims of the present invention.

Claims (10)

1. The utility model provides an anti thunderbolt insulating withstand voltage's temperature protector which characterized in that: the bimetal strip comprises an installation shell with an accommodating cavity, a bimetal strip located in the accommodating cavity, and a first lead and a second lead penetrating into the accommodating cavity, wherein one end of the bimetal strip is fixedly connected with the first lead, the other end of the bimetal strip is connected with the second lead in a fusible manner, the bimetal strip is arranged in an arc shape, the bimetal strip comprises a first metal strip located on the inner side of the arc shape and a second metal strip located on the outer side of the arc shape, and the thermal expansion coefficient of the first metal strip is higher than that of the second metal strip.

2. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 1, wherein: the first metal sheet has a coefficient of thermal expansion of 4 x 10^-6/℃～30*10^-6/℃。

3. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 1, wherein: the second metal sheet has a coefficient of thermal expansion of less than 3 x 10^-6/℃。

4. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 1, wherein: the first metal sheet and the second metal sheet have the same width.

5. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 1, wherein: one end of the bimetallic strip is directly welded with the first lead, and the other end of the bimetallic strip is welded with the second lead through fusible alloy.

6. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 5, wherein: the fusing temperature of the fusible alloy is 80-500 ℃.

7. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 1, wherein: the installation shell comprises a shell and a base, and the shell is clamped with the base to form the accommodating cavity.

8. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 7, wherein: the both sides of base respectively are provided with a lug, the shell be provided with lug assorted recess.

9. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 7, wherein: the base is provided with two through wires holes, first wire with the second wire is followed respectively the through wires hole is followed hold the chamber.

10. The lightning strike resistant, voltage insulating, temperature tolerant protector of claim 7, wherein: the first lead is fixed to the shell at one end connected with the bimetallic strip and at one end connected with the bimetallic strip, the second lead is fixed to the shell at the other end connected with the bimetallic strip.

Images