CN215448212U

CN215448212U - Temperature sensing probe for high-temperature sensor

Info

Publication number: CN215448212U
Application number: CN202122131703.6U
Authority: CN
Inventors: 刘长华; 付元胜; 余修军; 王斌
Original assignee: NANCHANG GONGKONG ELECTRICAL ASSEMBLE CO Ltd
Current assignee: NANCHANG GONGKONG ELECTRICAL ASSEMBLE CO Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-01-07
Anticipated expiration: 2031-09-06

Abstract

The utility model provides a temperature sensing probe that high temperature sensor used, includes armour line, temperature sensor, interior protection casing and the sealed glue of high temperature, temperature sensor pass through the sealed fixed mounting of glue of high temperature in the interior protection casing, the armour line includes armour line core and armour line casing, armour line core fixed mounting in the armour line casing, the one end of armour line core stretches out the armour line casing, the armour line core stretches out the one end of armour line casing passes the sealed glue of high temperature of interior protection casing with temperature sensor electric connection, the sealed welding of one end of armour line casing has an outer protection casing, outer protection casing set up in the armour line core stretches out the one end of armour line casing, outer protection casing can wrap completely interior protection casing. The utility model can effectively solve the problem of wire core fracture of the high-temperature sensor caused by large temperature rise gradient, and prolong the service life of the high-temperature sensor.

Description

Temperature sensing probe for high-temperature sensor

Technical Field

The utility model relates to the technical field of high-temperature sensors, in particular to a temperature sensing probe for a high-temperature sensor.

Background

The high-temperature sensor is used for detecting the exhaust temperature of automobile exhaust, and the actual detection range can reach 1000 ℃ at most. Most high-temperature sensors are installed on a tail gas discharge pipeline, but when some vehicle types are applied, the temperature in an engine manifold at the front end of an exhaust pipe needs to be detected, because the position is close to an outlet of a cylinder, the exhaust temperature is high, the rising gradient is about twice higher than that of the exhaust gas discharge pipeline, the temperature reaches 600 ℃/s, the sensor can generate violent thermal expansion and cold contraction due to overlarge temperature rising gradient, and particularly, the internal high-temperature-resistant hard lead wire is easy to break in the continuous drawing and shrinking process to cause the function failure of the sensor, so that the driving failure alarm of the vehicle is caused.

High temperature sensor can't satisfy above-mentioned durable service condition in the market of present stage, its inner structure is usually with laser to the temperature sensing chip welding on two built-in metal sinle silks of armour cable, because the temperature response characteristic of sensor will fully be considered, must jar the high-temperature-resistant sizing material of sintering type in the metal sheath of installation chip, the colloid of solidification is integrative chip and metal sheath bonding, nevertheless under too high temperature gradient strikes, outside sheath is asynchronous with inside armour cable core pyrocondensation, the two relative motion makes the chip leg that the inner lead is weakest pulled apart.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, provides a temperature sensing probe for a high-temperature sensor, and solves the problems that in the use process of the high-temperature sensor in the prior art, tail gas with high temperature gradient acts on the probe part of the high-temperature sensor, the outer shell of the probe is subjected to thermal expansion, but the temperature of the inner cavity is not changed, so that tensile stress can occur on the wire core of an armor wire, and the durability fracture is easy to generate.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a temperature sensing probe that high temperature sensor used, includes armour line, temperature sensor, interior protection casing and the sealed glue of high temperature, temperature sensor pass through the sealed fixed mounting of glue of high temperature in the interior protection casing, the armour line includes armour line core and armour line casing, armour line core fixed mounting in the armour line casing, the one end of armour line core stretches out the armour line casing, the armour line core stretches out the one end of armour line casing passes the sealed glue of high temperature in the interior protection casing with temperature sensor electric connection, the sealed welding of one end of armour line casing has an outer protection casing, outer protection casing set up in the armour line core stretches out the one end of armour line casing, outer protection casing can wrap completely interior protection casing.

Furthermore, the inner cavity of the outer protection shell is matched with the shape of the inner protection shell, the opening of the outer protection shell is matched with the armor shell, and the opening of the outer protection shell is welded on the armor shell.

Furthermore, the armor wire core is also fixedly arranged in the armor shell through the high-temperature sealant.

Furthermore, a gap of 0.01mm-0.02mm is reserved between the inner wall of the outer protection shell and the outer wall of the inner protection shell.

The temperature-sensing probe has a simple structure and a reasonable design, the joint of the temperature sensor and the armor wire core is designed into a double-layer shell structure, when the temperature-sensing probe is used for detecting the exhaust temperature of automobile exhaust, the outer protective shell is heated to raise the temperature firstly, the heat is transferred to the inner cavity after the outer protective shell is heated to raise the temperature, the inner protective shell and the armor wire core in the inner cavity are heated to raise the temperature simultaneously and are heated and expanded together with the inner protective shell, the armor wire core can be effectively prevented from being expanded and pulled up by the shell which is heated firstly, the armor wire core can be effectively prevented from being subjected to durable fracture due to temperature rise gradient, the service life of the whole temperature-sensing probe is prolonged, and the long-life use requirement of an automobile engine can be met.

Drawings

FIG. 1 is a schematic view of the assembled structure of the apparatus of the present invention;

FIG. 2 is an exploded view of an assembly structure of an outer protective shell on armor wires in the present application;

in the figure: 1. the high-temperature-resistant cable comprises an armor wire 11, an armor wire core 12, an armor wire shell 2, a temperature sensor 3, an inner protective shell 4, high-temperature sealant 5 and an outer protective shell.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, the temperature sensing probe for the high temperature sensor comprises an armor wire 1, a temperature sensor 2, an inner protective shell 3 and a high temperature sealant 4, the temperature sensor 2 is fixedly arranged in the inner protective shell 3 through high-temperature sealant 4, the armor wire 1 comprises an armor wire core 11 and an armor shell 12, the armor wire core 11 is fixedly arranged in the armor shell 12, one end of the armor wire core 11 extends out of the armor shell 12, one end of the armor wire core 11 extending out of the armor shell 12 penetrates through the high-temperature sealant 4 in the inner protection shell 3 to be electrically connected with the temperature sensor 2, one end of the armor shell 12 is hermetically welded with an outer protection shell 5, the outer protection shell 5 is arranged at one end of the armor wire core 11 extending out of the armor shell 12, and the outer protection shell 5 can completely cover the inner protection shell 3; the structure of the armor wire shell comprises a hollow cavity structure with an opening at one end of the outer protection shell 5, wherein the inner cavity of the outer protection shell 5 is matched with the shape of the inner protection shell 3, the opening of the outer protection shell 5 is matched with the armor wire shell 12, and the opening of the outer protection shell 5 is welded on the armor wire shell 12; the armor wire core 11 is also fixedly arranged in the armor shell 12 through the high-temperature sealant 4; a gap of 0.01mm-0.02mm is reserved between the inner wall of the outer protection shell 5 and the outer wall of the inner protection shell 3.

The temperature-sensing probe is simple in structure and reasonable in design, the joint of the temperature sensor 2 and the armor wire core 11 is designed into a double-layer shell structure, when the temperature-sensing probe is used for detecting the exhaust temperature of automobile exhaust, the outer protective shell 5 is heated to raise the temperature firstly, heat is transferred to the inner cavity after the outer protective shell 5 is heated to raise the temperature, the inner protective shell 3 and the armor wire core 11 in the inner cavity are heated to raise the temperature simultaneously, the armor wire core 11 and the inner protective shell 3 are heated and expanded together, the armor wire core 11 can be effectively prevented from being expanded and pulled up by the shell which is heated firstly, the armor wire core 11 can be effectively prevented from being subjected to durable fracture due to temperature rise gradient, the service life of the whole temperature-sensing probe is prolonged, and the long-life use requirement of an automobile engine can be met.

The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature sensing probe for a high-temperature sensor comprises an armor wire (1), a temperature sensor (2), an inner protective shell (3) and high-temperature sealant (4), and is characterized in that the temperature sensor (2) is fixedly installed in the inner protective shell (3) through the high-temperature sealant (4), the armor wire (1) comprises an armor wire core (11) and an armor shell (12), the armor wire core (11) is fixedly installed in the armor shell (12), one end of the armor wire core (11) extends out of the armor shell (12), one end of the armor wire core (11) extending out of the armor shell (12) penetrates through the high-temperature sealant (4) in the inner protective shell (3) to be electrically connected with the temperature sensor (2), one end of the armor shell (12) is hermetically welded with an outer protective shell (5), the outer protection shell (5) is arranged at one end, extending out of the armor wire core (11), of the armor wire shell (12), and the outer protection shell (5) can completely cover the inner protection shell (3).

2. The temperature sensing probe for the high temperature sensor according to claim 1, wherein the outer protective casing (5) has a hollow cavity structure with an opening at one end, an inner cavity of the outer protective casing (5) is adapted to an outer shape of the inner protective casing (3), an opening of the outer protective casing (5) is adapted to the armor casing (12), and the opening of the outer protective casing (5) is welded to the armor casing (12).

3. The temperature sensing probe for the high temperature sensor according to claim 1, wherein the armor wire core (11) is also fixedly mounted in the armor shell (12) through the high temperature sealant (4).

4. The temperature-sensing probe for the high-temperature sensor according to claim 2, wherein a gap of 0.01mm to 0.02mm is reserved between the inner wall of the outer protective shell (5) and the outer wall of the inner protective shell (3).