CN209992085U - Pipeline temperature sensor - Google Patents
Pipeline temperature sensor Download PDFInfo
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- CN209992085U CN209992085U CN201920501458.3U CN201920501458U CN209992085U CN 209992085 U CN209992085 U CN 209992085U CN 201920501458 U CN201920501458 U CN 201920501458U CN 209992085 U CN209992085 U CN 209992085U
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- temperature
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Abstract
The utility model discloses a pipeline temperature sensor relates to the aircraft field. The sensor is used for solving the problems of low reliability and weak environmental adaptability of the existing sensor. This pipeline temperature sensor includes: temperature sensing element assembly, shell, screw, electric connector; the shell comprises a measuring end, a fixed end and a signal conversion end; the temperature sensing element component comprises a protective cap, a platinum resistor and a sensing element support; the platinum resistor is wrapped in the magnesium oxide powder, one end of the sensitive element strut is contacted with the magnesium oxide powder, a lead of the platinum resistor extends out of the magnesium oxide powder and penetrates into the sensitive element strut to be connected with the silver wire, the silver wire penetrates out of the sensitive element strut to be connected with the high-temperature lead, and the high-temperature lead is connected with the electric connector; the length of the protective cap is greater than that of the platinum resistor, and the magnesium oxide powder is wrapped in the protective cap and extends to two sides of the magnesium oxide powder; the protective cap is arranged at the measuring end, and the sensitive element support is fixed at the fixed end and extends to the signal conversion end; the signal conversion end is fixedly connected with the electric connector through a screw.
Description
Technical Field
The utility model relates to an aircraft field, more specifically relate to pipeline temperature sensor.
Background
In the control of a fuel system, a lubricating oil system, a hydraulic system and an environmental control system of an aircraft, the fluid temperature is one of very important parameters, the working performance of each system is directly influenced, and the accurate measurement of the fluid temperature of each system has important significance on flight safety.
A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument and has a plurality of varieties. The measurement method can be divided into a contact type and a non-contact type, and the measurement method can be divided into a thermal resistor and a thermocouple according to the characteristics of sensor materials and electronic elements. The airborne environmental conditions provide high requirements for the adaptability of the temperature sensor, the traditional temperature sensing element assembly structure and the assembly process cannot meet the index requirements, the temperature sensing element assembly structure needs to be designed in a targeted manner in order to improve the adaptability of the product to the vibration environmental conditions, and corresponding solutions are taken for weak links in the assembly process.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a pipeline temperature sensor for there is the low, the less strong problem of environmental suitability of reliability in solving current pipeline temperature sensor.
An embodiment of the utility model provides a pipeline temperature sensor, should include: the temperature sensing element assembly, the shell, the screw, the electric connector, the silver wire and the high-temperature lead;
the shell comprises a measuring end, a fixed end and a signal conversion end;
the temperature sensing element component comprises a protective cap made of a copper alloy material, a platinum resistor filled with magnesium oxide powder at the periphery, and a sensitive element support made of an alumina ceramic material; the platinum resistor is wrapped in the magnesium oxide powder, one end of the sensitive element strut is in contact with the magnesium oxide powder, a lead of the platinum resistor extends out of the magnesium oxide powder, penetrates into the sensitive element strut and is connected with the silver wire, the silver wire penetrates out of the sensitive element strut and is connected with a high-temperature lead, and the high-temperature lead is connected with the electric connector; the length of the protective cap is greater than that of the platinum resistor, and the magnesium oxide powder is wrapped in the protective cap and extends to two sides of the magnesium oxide powder;
the protective cap is cylindrical and is arranged at the measuring end, and the sensitive element support is fixed at the fixed end and extends to the signal conversion end;
the signal conversion end is fixedly connected with the electric connector through the screw.
Preferably, the temperature sensing element assembly further comprises a fluoroplastic sleeve, a first heat shrinkable tube and a second heat shrinkable tube;
the two fluoroplastic sleeves wrap the silver wires and the welding spots which penetrate out of the sensitive element strut, the first heat-shrinkable tube is in contact with the other end of the sensitive element strut, and the two fluoroplastic sleeves are wrapped;
the two fluoroplastic sleeves wrap the silver wire penetrating out of the sensitive element support and welding points of the silver wire and the high-temperature lead respectively, and the first heat-shrinkable tube is in contact with the other end of the sensitive element support to wrap the two fluoroplastic sleeves;
a lead of the platinum resistor penetrating into a sensitive element support is connected with the silver wire in a spot welding mode, the silver wire penetrating out of the sensitive element support is connected with the high-temperature lead in a fluoroplastic sleeve in a welding mode through high-temperature soldering tin, and a contact part of the sensitive element support and the fluoroplastic sleeve is in transition through the first heat shrinkage pipe; and the high-temperature lead extending out of the first heat-shrinkable tube is provided with the second heat-shrinkable tube.
Preferably, the platinum resistor has two leads penetrating into the sensitive element support, each lead of the platinum resistor is connected with one silver wire by spot welding, and each silver wire penetrates out of the sensitive element support and then is connected with two high-temperature wires by high-temperature soldering tin welding.
Preferably, the high-temperature wire is connected with the contact of the electric connector in a crimping mode, wherein the high-temperature wire is spot-coated 914 with glue at the crimping position.
Preferably, the temperature sensing element assembly further comprises heat-resistant bonding sealing silicone rubber, one end of the heat-resistant bonding sealing silicone rubber is respectively contacted with the magnesium oxide powder and the platinum resistor, and the heat-resistant bonding sealing silicone rubber is wrapped in the protective cap.
Preferably, the side surface of the fixed end of the shell, which is contacted with the measuring end, is a 74-degree conical surface, and is hermetically mounted with the pipe mounting seat through M14 multiplied by 1 threads.
Preferably, the pipe temperature sensor further comprises heat-resistant adhesive sealing silicone rubber, a gasket, and a fuse.
The heat-resistant bonding sealing silicon rubber is used for fixing the sensitive element support at the fixed end and the signal conversion end.
The gasket is arranged below the screw; the fuses are respectively arranged among the plurality of screws.
An embodiment of the present invention provides a pipeline temperature sensor, including: the temperature sensing element assembly, the shell, the screw, the electric connector, the silver wire and the high-temperature lead; the shell comprises a measuring end, a fixed end and a signal conversion end; the temperature sensing element component comprises a protective cap made of a copper alloy material, a platinum resistor filled with magnesium oxide powder at the periphery, and a sensitive element support made of an alumina ceramic material; the platinum resistor is wrapped in the magnesium oxide powder, one end of the sensitive element strut is in contact with the magnesium oxide powder, a lead of the platinum resistor extends out of the magnesium oxide powder and penetrates into the sensitive element strut to be connected with the silver wire, the silver wire penetrates out of the sensitive element strut to be connected with a high-temperature lead, and the high-temperature lead is connected with the electric connector; the length of the protective cap is greater than that of the platinum resistor, and the magnesium oxide powder is wrapped in the protective cap and extends to two sides of the magnesium oxide powder; the protective cap is cylindrical and is arranged at the measuring end, and the sensitive element support is fixed at the fixed end and extends to the signal conversion end; the signal conversion end is fixedly connected with the electric connector through the screw. The sensor adopts a temperature sensing sensitive element to sense temperature change, converts the temperature change into resistance value change, and realizes the input and output functions of electric signals through an input and output interface of the electric connector; moreover, the protective cap made of the copper alloy material has good thermal conductivity, and the magnesium oxide powder arranged around the platinum resistor can enable the platinum resistor to sense the temperature change of the measured medium in real time; furthermore, the sensitive element support prepared from the alumina ceramic material has high insulation, and can meet the requirements of vibration and high and low temperature use environments. The embodiment of the utility model provides a pipeline temperature sensor has light in weight, the precision is high, the reliability is high, characteristics that environmental suitability is good, can be used for harsh service environment condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a pipeline temperature sensor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an embodiment of the present invention providing an outline of a pipeline temperature sensor;
fig. 3 is a schematic sectional view of a pipeline temperature sensor according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a temperature sensing element assembly according to an embodiment of the present invention;
fig. 5 is a schematic view of a protective cap component according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a sensitive element support column component according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating a high-temperature wire and a contact crimping root point of an electrical connector according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of a housing part according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 exemplarily shows a schematic diagram of a pipeline temperature sensor provided by an embodiment of the present invention. In the prior art, a pipeline temperature sensor realizes temperature measurement based on the principle that metal resistance changes along with temperature changes. As shown in fig. 1, a platinum resistor is used as a temperature sensing sensitive element to measure the temperature of a medium in a pipeline, and the temperature sensing sensitive element mainly functions to sense temperature changes and convert the temperature changes into changes of resistance values; the electric connector is an input/output interface of the whole sensor, and realizes the input/output function of electric signals.
Fig. 2 is the embodiment of the utility model provides a pipeline temperature sensor appearance schematic diagram, fig. 3 is the embodiment of the utility model provides a pipeline temperature sensor schematic diagram of structural section. As shown in fig. 2, the pipe temperature sensor housing 2 is designed to be an all-metal structure. As shown in fig. 3, the pipeline temperature sensor mainly comprises a temperature sensing element assembly 1, a shell 2, 9132RTV heat-resistant bonding sealing silicon rubber 3, a cylindrical head screw 4 with a safety hole at the head, a gasket 5, a fuse 6 and an electric connector 7.
Specifically, casing 2 adopts the design of all metallic structure integration in the embodiment of the utility model provides an in, according to the relation of the temperature-sensing element and the signal conversion that set up in casing 2 and casing 2, divide into measuring end, stiff end and signal conversion end with casing 2 in proper order. It should be noted that, the above-mentioned division of the housing 2 into three parts does not mean that the housing 2 is composed of three parts in practical application, and the housing 2 is substantially an integral structure.
Fig. 4 is a schematic cross-sectional view of a temperature sensing element assembly 1 according to an embodiment of the present invention. As shown in FIG. 4, the temperature-sensing element assembly 1 mainly comprises 9132RTV heat-resistant adhesive sealing silicone rubber 3, protective caps 1-2, platinum resistors 1-3, magnesium oxide powder 1-4, sensitive element pillars 1-5, silver wires 1-6, fluoroplastic sleeves 1-7, a first heat-shrinkable tube
1-8 parts of high-temperature lead wire 1-9 parts of second heat shrinkable tube
1-10。
Fig. 5 is a schematic cross-sectional view of a part of the protection cap 1-2 according to an embodiment of the present invention, and fig. 6 is a schematic cross-sectional view of a part of the sensitive element support 1-5 according to an embodiment of the present invention. In the embodiment of the present invention, the protective cap 1-2 is made of copper alloy material, and the periphery of the platinum resistor 1-3 is filled with magnesium oxide powder 1-4, i.e. the magnesium oxide powder 1-4 wraps the platinum resistor in the magnesium oxide powder 1-4; furthermore, one end of a sensitive element support 1-5 made of alumina ceramic material is contacted with the magnesia powder 1-4 box. It should be noted that the lead wires disposed on the platinum resistor extend out of the magnesia powder 1-4 and penetrate into the sensor strut 1-5, i.e., the two lead wires disposed on the platinum resistor penetrate through the magnesia powder 1-4 and then penetrate into the sensor strut 1-5.
The protective cap 1-2 made of the copper alloy material needs to protect the magnesia powder 1-4 and fix the magnesia powder on the head of the sensitive part strut 1-5. In the embodiment of the present invention, the length of the protective cap 1-2 is greater than the length of the magnesium oxide powder 1-4 wrapping the platinum resistor, that is, the protective cap 1-2 wraps the magnesium oxide powder 1-4 completely, and both ends of the protective cap 1-2 extend out of both sides of the magnesium oxide powder 1-4, and a part of the sensitive element pillar 1-5 contacting with the magnesium oxide powder 1-4 is wrapped by the protective cap 1-2. Accordingly, the heat-resistant adhesive sealing silicone rubber 3 in contact with the magnesia powder 1-4 is also entirely enclosed by the protective cap 1-2. It should be noted that the heat-resistant adhesive sealing silicone rubber 3 in contact with the other ends of the magnesium oxide powders 1 to 4 may also be in contact with part of the platinum resistors. In the embodiment of the present invention, whether the heat-resistant bonding sealing silicone rubber 3 contacts with the platinum electrode is not limited, that is, the heat-resistant bonding sealing silicone rubber 3 only contacts with the magnesia powder 1-4, or partially contacts with the platinum resistor.
Further, as shown in fig. 4, the temperature sensing element assembly includes fluoroplastic sleeves 1-7, silver wires 1-6 and high temperature solder joints for the sleeves extending beyond the sensor posts 1-5. Specifically, the number of the silver wires 1-6 extending out of the sensitive element support 1-5 is two, and each silver wire 1-6 is connected with two high-temperature conducting wires 1-9 through high-temperature soldering tin welding. In the embodiment of the present invention, a platinum resistor includes two leads, and accordingly, four high temperature wires 1-9 are formed by spot welding with the silver wires 1-6 and soldering the silver wires 1-6 with the high temperature wires with high temperature solder. Further, a first heat shrinkable tube
1-8 are in contact with the other ends of the sensitive element pillars 1-5, and because the sensitive element pillars 1-5 extend out of two silver wires 1-6 and the silver wires 1-6 are respectively sleeved in fluoroplastic sleeves 1-7, a first heat-shrinkable tube can be determined
1-8 two fluoroplastic sleeves 1-7 are sleeved in the inner sleeve, and correspondingly, the first heat-shrinkable tube
Four high temperature wires 1-9 can extend out of the inside of the lead frame 1-8.
FIG. 7 shows the contact between the high-temperature wires 1-9 and the electrical connector 7 according to an embodiment of the present inventionAnd dispensing the root part of the piece crimping. As shown in FIG. 7, the high temperature wires 1-9 are extended out of the first heat shrinkable tube1-8 are then crimped to the contacts of the electrical connector 7. In practical application, because the contact element of the electric connector 7 is in clearance fit with the inner hole of the electric connector, the contact element can rotate and axially float during vibration, and the roots of the high-temperature wires 1-9 connected with the contact element are stressed and broken, so that product failure is caused. In order to avoid the occurrence of such phenomena, in the embodiment of the present invention, the high temperature wires 1 to 9 are connected to the contact of the electrical connector in a crimping manner, and the glue is applied 914 to the root of the high temperature wires 1 to 9 at the crimping position, so that the root of the high temperature wires 1 to 9 is stressed when the vibration is avoided, and the adaptability of the product to the vibration environment is effectively improved.
As shown in fig. 4, the temperature sensing element assembly 1 can be determined to be cylindrical in shape, and in practical use, the front portion of the temperature sensing element assembly 1 is disposed at the measuring end of the housing, and the rear portion of the temperature sensing element assembly 1 is fixed to the fixed end and the signal converting end with heat-resistant adhesive sealing silicone rubber 3. It should be noted that the rear portion of the temperature sensing element assembly 1 mainly includes a portion of the sensor support 1-5, the first heat shrink tube
1-8 and a second heat shrinkable tube
1-10. In practical application, the second heat-shrinkable tube is passed through
1-10 are high temperature wires 1-9, and since the high temperature wires 1-9 function to input resistance values into the electrical connector 7, an electrical connector 7 is also provided outside the housing. In the embodiment of the present invention, the housing is fixed to the electrical connector 7 mainly by the screws 4, specifically, the gasket 5 is provided below each screw 4, and the fuse 6 is provided between each screw 4 for preventing the screw 4 from loosening, so thatTo ensure a reliable connection between the screws 4. It should be noted that, in the embodiment of the present invention, a total of four screws 4 are provided between the housing and the electrical connector 7, and the screws 4 are cylindrical head screws with safety holes at their heads.
Fig. 8 is a schematic cross-sectional view of a part of the housing 2 according to an embodiment of the present invention. As shown in fig. 8, the integrated pipe temperature sensor is used and needs to be fixedly connected to the pipe, in the embodiment of the present invention, in order to conveniently fixedly connect the pipe temperature sensor to the pipe, preferably, the outer layer of the fixed end is set to be a 74 ° conical surface, and the pipe temperature sensor can be fixedly connected to the pipe through M14 × 1 threads on the 74 ° conical surface.
In summary, an embodiment of the present invention provides a pipeline temperature sensor, including: temperature sensing element assembly, shell, screw, electric connector; the shell comprises a measuring end, a fixed end and a signal conversion end; the temperature sensing element component comprises a protective cap made of a copper alloy material, a platinum resistor filled with magnesium oxide powder at the periphery, and a sensitive element support made of an alumina ceramic material; the platinum resistor is wrapped in the magnesium oxide powder, one end of the sensitive element strut is in contact with the magnesium oxide powder, a lead of the platinum resistor extends out of the magnesium oxide powder and penetrates into the sensitive element strut to be connected with the silver wire, the silver wire penetrates out of the sensitive element strut to be connected with a high-temperature lead, and the high-temperature lead is connected with an electric connector; the length of the protective cap is greater than that of the platinum resistor, and the magnesium oxide powder is wrapped in the protective cap and extends to two sides of the magnesium oxide powder; the protective cap is cylindrical and is arranged at the measuring end, and the sensitive element support is fixed at the fixed end and extends to the signal conversion end; the signal conversion end is fixedly connected with the electric connector through the screw. The sensor can sense temperature change through the temperature sensing sensitive element, and convert the temperature change into resistance value change, and input and output functions of electric signals are realized through the input and output interfaces of the electric connector; moreover, the protective cap made of the copper alloy material has good thermal conductivity, and the magnesium oxide powder arranged around the platinum resistor can enable the platinum resistor to sense the temperature change of the measured medium in real time; furthermore, the sensitive element support prepared from the alumina ceramic material has high insulation, and can meet the requirements of vibration and high and low temperature use environments. The embodiment of the utility model provides a pipeline temperature sensor has light in weight, and the precision is high, and the reliability is high, characteristics that environmental suitability is good can be used for harsh service environment condition.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A pipeline temperature sensor, comprising: the temperature sensing element assembly, the shell, the screw, the electric connector, the silver wire and the high-temperature lead;
the shell comprises a measuring end, a fixed end and a signal conversion end;
the temperature sensing element component comprises a protective cap made of a copper alloy material, a platinum resistor filled with magnesium oxide powder at the periphery, and a sensitive element support made of an alumina ceramic material; the platinum resistor is wrapped in the magnesium oxide powder, one end of the sensitive element strut is in contact with the magnesium oxide powder, a lead of the platinum resistor extends out of the magnesium oxide powder and penetrates into the sensitive element strut to be connected with the silver wire, the silver wire penetrates out of the sensitive element strut to be connected with the high-temperature lead, and the high-temperature lead is connected with an electric connector; the length of the protective cap is greater than that of the platinum resistor, and the magnesium oxide powder is wrapped in the protective cap and extends to two sides of the magnesium oxide powder;
the protective cap is cylindrical and is arranged at the measuring end; the sensitive element support is fixed on the fixed end and extends to the signal conversion end;
the signal conversion end is fixedly connected with the electric connector through the screw.
2. The sensor of claim 1, wherein the temperature-sensing element assembly further comprises a fluoroplastic sleeve, a first heat-shrink tubing, and a second heat-shrink tubing;
the two fluoroplastic sleeves wrap the silver wire penetrating out of the sensitive element support and welding points of the silver wire and the high-temperature lead respectively, and the first heat-shrinkable tube is in contact with the other end of the sensitive element support to wrap the two fluoroplastic sleeves;
a lead of the platinum resistor penetrating into the sensitive element support is connected with the silver wire in a spot welding mode, the silver wire penetrating out of the sensitive element support is connected with the high-temperature lead in a fluoroplastic sleeve in a welding mode through high-temperature soldering tin, and a contact part of the sensitive element support and the fluoroplastic sleeve is in transition through the first heat-shrinkable tube; and the high-temperature lead extending out of the first heat-shrinkable tube is provided with the second heat-shrinkable tube.
3. The sensor of claim 2, wherein the platinum resistor leads are inserted into the sensor support two in total, each platinum resistor lead is connected with one silver wire by spot welding, and each silver wire is connected with two high-temperature wires by high-temperature soldering after penetrating out of the sensor support.
4. The sensor of claim 2, wherein the high temperature wire is connected to the contact of the electrical connector by crimping, wherein the high temperature wire is spot-coated 914 with glue at the crimp.
5. The sensor of claim 1, wherein the temperature sensing element assembly further comprises a heat-resistant adhesive sealing silicone rubber, one end of which is in contact with the magnesium oxide powder and the platinum resistor, respectively, and the protective cap encloses the heat-resistant adhesive sealing silicone rubber.
6. The sensor of claim 1, wherein the side of the fixed end of the housing that contacts the measurement end is tapered at 74 ° to sealingly engage the tube mount by M14 x 1 threads.
7. The sensor of claim 1, wherein the duct temperature sensor further comprises a heat resistant adhesive sealing silicone rubber, a gasket, and a fuse;
the heat-resistant bonding sealing silicon rubber is used for fixing the sensitive element support on the fixed end and the signal conversion end;
the gasket is arranged below the screw; the fuses are respectively arranged among the plurality of screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920501458.3U CN209992085U (en) | 2019-04-15 | 2019-04-15 | Pipeline temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920501458.3U CN209992085U (en) | 2019-04-15 | 2019-04-15 | Pipeline temperature sensor |
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| Publication Number | Publication Date |
|---|---|
| CN209992085U true CN209992085U (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920501458.3U Active CN209992085U (en) | 2019-04-15 | 2019-04-15 | Pipeline temperature sensor |
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| CN (1) | CN209992085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345663A (en) * | 2021-05-17 | 2021-09-03 | 苏州长风航空电子有限公司 | High-temperature-resistant resistor structure and packaging method |
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2019
- 2019-04-15 CN CN201920501458.3U patent/CN209992085U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345663A (en) * | 2021-05-17 | 2021-09-03 | 苏州长风航空电子有限公司 | High-temperature-resistant resistor structure and packaging method |
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