CN216116415U - Temperature sensor of high-temperature test chamber - Google Patents
Temperature sensor of high-temperature test chamber Download PDFInfo
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- CN216116415U CN216116415U CN202121469671.4U CN202121469671U CN216116415U CN 216116415 U CN216116415 U CN 216116415U CN 202121469671 U CN202121469671 U CN 202121469671U CN 216116415 U CN216116415 U CN 216116415U
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- test chamber
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Abstract
The utility model discloses a high-temperature test box temperature sensor in the field of temperature sensors, which comprises a metal sleeve and two temperature measuring elements, wherein one end of the metal sleeve is opened, the other end of the metal sleeve is sealed, the two temperature measuring elements are arranged at one end of the inner end seal of the metal sleeve and are consistent in front and back positions, and a lead of the temperature measuring element is led out through the opening end of the metal sleeve. The utility model has the beneficial effects that: the two temperature measuring elements are arranged in the metal sleeve in parallel, the front and the back of the installation position are consistent, the consistency of the temperature of the test points is guaranteed, the problem that the double control temperature of the high-temperature test box is inconsistent due to the fact that the single double temperature measuring elements are arranged in the air convection space and the measuring end cannot be guaranteed to be arranged on the cross section of the same temperature can be avoided, and the temperature measuring device has the advantages of being reliable in measured data and small in temperature fluctuation.
Description
Technical Field
The utility model relates to the field of temperature sensors, in particular to a temperature sensor of a high-temperature test chamber.
Background
The aviation power system usually uses heating equipment such as a high-temperature test box and a high-temperature furnace to dry mechanical parts, adjust the heat treatment state of metal materials and products thereof, and use temperature-resistant and corrosion-resistant samples of the materials. In order to ensure the accuracy of temperature control of the temperature-resistant equipment, double temperature and double control are usually adopted, wherein a digital display regulator is matched with a Pt100 platinum resistor, a recorder is matched with the Pt100 platinum resistor, and the two systems respectively have the following functions: the digital temperature display regulator is used for controlling the heating rate and the constant temperature time of the working chamber, and the recorder is mainly used for recording temperature and giving an over-temperature alarm.
Under normal conditions, the temperatures of the two instruments are close to be consistent (the ideal state is consistent), the real condition of a temperature field in the high-temperature test box is reflected, and otherwise, the temperature control and alarm effects cannot be realized. However, in practical use, it is found that the display temperature of the digital temperature display regulator on the high-temperature test box is inconsistent with the temperature of the industrial process recorder, the difference between the display temperature and the industrial process recorder is large, which can not be judged that the display temperature of the instrument is accurate, and the inspection finds that the platinum thermal resistance temperature sensor connected with the high-temperature test box digital display meter and the industrial recorder is a small ceramic tube split sensor connected by a nut in direct compression joint with a silver wire and is arranged in a stainless steel protective tube which is arranged in an oven, the gap is large, air convection is fast during heating, the real temperature of the oven can not be reflected, and particularly, the platinum thermal resistance is easy to break and a mounting gasket is oxidized after long-term use and disassembly and installation; meanwhile, the measuring ends of the two temperature sensors (industrial platinum resistors) cannot be guaranteed to be arranged on the section with the same temperature, so that the display temperature of the digital temperature display regulator is inconsistent with the temperature of the industrial process recorder.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects that the two split temperature sensors cannot ensure the consistent measurement temperature and the like, the utility model aims to solve the technical problems that: the armored double-core high-temperature test box temperature sensor can ensure that two measuring end positions are consistent.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the high-temperature test box temperature sensor comprises a metal sleeve and two temperature measuring elements, wherein one end of the metal sleeve is open, the other end of the metal sleeve is sealed, the two temperature measuring elements are arranged at one end of the inner end of the metal sleeve and are consistent in front and back positions, and a lead of the temperature measuring element is led out through the open end of the metal sleeve.
Furthermore, the opening end of the metal sleeve is provided with a fixed seat, and the periphery of the fixed seat is provided with a fixed hole.
Furthermore, a soft adapter tube is further arranged in the middle of the fixing seat, and a lead of the temperature measuring element is led out of the metal sleeve and then wrapped in the adapter tube.
Further, the adapter tube is a polytetrafluoroethylene adapter tube.
Furthermore, the temperature measuring element comprises a ceramic sleeve and a film temperature sensing assembly positioned in the ceramic sleeve, the film temperature sensing assembly comprises an alumina framework and a resistance carving wire wound on the alumina framework, and the resistance carving wire is connected with the lead through a resistance lead.
Further, the resistance carving wire is a platinum alloy coating wire formed on the alumina framework through vapor deposition and laser micro-etching.
Further, the wire is a pure silver wire.
Furthermore, the temperature measuring element and the lead are fixed in the metal sleeve through epoxy resin.
The utility model has the beneficial effects that: the two temperature measuring elements are arranged in the metal sleeve in parallel, the front and the back of the installation position are consistent, the consistency of the temperature of the test points is guaranteed, the problem that the double control temperature of the high-temperature test box is inconsistent due to the fact that the single double temperature measuring elements are arranged in the air convection space and the measuring end cannot be guaranteed to be arranged on the cross section of the same temperature can be avoided, and the temperature measuring device has the advantages of being reliable in measured data and small in temperature fluctuation.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Figure 2 is a side view of the structure of the present invention.
FIG. 3 is a schematic view of the temperature measuring element of the present invention.
The mark in the figure is 1-metal sleeve, 2-temperature measuring element, 3-epoxy resin, 11-fixing seat, 12-fixing hole, 13-adapter tube, 21-lead, 22-ceramic sleeve, 23-alumina framework, 24-resistance carved wire and 25-resistance lead.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
As shown in fig. 1 and 2, the temperature sensor of the high-temperature test chamber of the utility model comprises a metal sleeve 1 and two temperature measuring elements 2, wherein one end of the metal sleeve 1 is open, the other end of the metal sleeve is closed, the two temperature measuring elements 2 are arranged at one end of the inner closed end of the metal sleeve 1, the front and rear positions of the two temperature measuring elements are consistent, and a lead of the temperature measuring element 2 is led out through the open end of the metal sleeve 1. The front-rear position coincidence here means the front-rear position of the temperature measuring element 2 with respect to the closed end of the metal sleeve 1.
According to the utility model, two temperature measuring elements 2 are packaged in the same metal sleeve 1, and the front position and the rear position are kept consistent, and the two temperature measuring elements 2 are respectively connected with a digital temperature display regulator and a recorder through leads 21. After the metal sleeve 1 is inserted into the high-temperature test box, the two temperature measuring elements 2 can detect the temperature of the same position in the high-temperature test box, the influence caused by air flow can be avoided, the temperature detected by the two temperature measuring elements is ensured to be the same, and the problem that the temperatures of the two temperature measuring elements are not consistent independently is avoided.
For the metal sleeve 1, according to the structural size and the actual requirement of the temperature measuring element 2, the metal sleeve 1 with the outer diameter of about Φ 6mm is generally adopted. In addition, in order to conveniently install the temperature sensor in a high-temperature test chamber, a fixing seat 11 is arranged at the opening end of the metal sleeve 1, fixing holes 12 are formed in the periphery of the fixing seat 11, and screws penetrate through the fixing holes 12 to fix the whole temperature sensor in the high-temperature test chamber.
The middle part of the fixed seat 11 is also provided with a soft adapter tube 13, and the lead 21 of the temperature measuring element 2 is led out of the metal sleeve 1 and then wrapped in the adapter tube 13. The adapter tube 13 may be a flexible tube made of teflon. Because the wire generally adopts tiny pure silver wire, easy rupture sets up adapter tube 13 and wraps up, can play certain fixed and guard action to wire 21 to improve temperature sensor's life.
For the temperature measuring element 2, the temperature measuring element 2 adopted in the present application includes a ceramic sleeve 22 and a thin film temperature sensing component located in the ceramic sleeve 22, as shown in fig. 3, the thin film temperature sensing component includes an alumina framework 23 and a resistance carved wire 24 wound on the alumina framework 23, and the resistance carved wire 24 is connected with the lead 21 through a resistance lead 25. Further, the manufacturing method of the resistance scribing wire 24 is that a layer of platinum alloy is first vapor-plated on the alumina framework 23, and then a platinum alloy plating wire is formed by adopting laser micro-etching.
Because encapsulate platinum resistance in metal sleeve 1, the heat conduction efficiency of its platinum resistance will reduce, and film thermal resistance hot junction size can be very little, and can closely link into an organic whole through welding and testee or temperature sensing body, reduce heat transfer resistance, film thermal resistance thermometer can extensively be used for quick temperature measurement, have small, the precision is high, dynamic response is fast, the uniformity is good, advantages such as indicating value is stable, through adopting epoxy heat-conducting resin, can improve the problem that traditional film platinum resistance temperature resistant is low partially.
In order to avoid the problems that the platinum resistor is easy to break and the mounting gasket is easy to oxidize when the platinum resistor is used for a long time and is disassembled and mounted, the temperature measuring element 2 and the lead 21 are fixed in the metal sleeve 1 through the epoxy resin 3, and the service life of the temperature measuring element 2 can be effectively prolonged.
The utility model is further illustrated by the following specific examples.
The first embodiment is as follows:
a comparison test is carried out by adopting the armored double-core temperature sensor and two traditional split sensors, and the comparison result is shown in the table 1, wherein the table 1 shows the comparison of armored double-core temperature detection and split temperature detection, and the table 2 shows the temperature detection difference of armored double-core temperature.
TABLE 1 armored twin-core and split temperature detection contrast
TABLE 2 armored twin core temperature detection Difference
As can be seen from the table above, the temperature sensor provided by the utility model has smaller detection error and higher detection precision, and has good practicability and application prospect.
Claims (8)
1. High temperature test case temperature sensor, characterized by: including metal sleeve (1) and temperature-measuring element (2), metal sleeve (1) one end opening, other end head, temperature-measuring element (2) include two, and the one end that all sets up head in metal sleeve (1) is unanimous around and the position, and wire (21) of temperature-measuring element (2) are drawn forth through metal sleeve (1) open end, and two temperature-measuring element (2) link to each other with digital temperature display regulator and record appearance through wire (21) respectively.
2. The high temperature test chamber temperature sensor of claim 1, wherein: the opening end of the metal sleeve (1) is provided with a fixed seat (11), and the periphery of the fixed seat (11) is provided with a fixed hole (12).
3. The high temperature test chamber temperature sensor of claim 2, wherein: the middle part of the fixed seat (11) is also provided with a soft adapter tube (13), and a lead (21) of the temperature measuring element (2) is led out of the metal sleeve (1) and then wrapped in the adapter tube (13).
4. The high temperature test chamber temperature sensor of claim 3, wherein: the adapter tube (13) is a polytetrafluoroethylene adapter tube.
5. The high-temperature test chamber temperature sensor according to any one of claims 1 to 4, wherein: the temperature measuring element (2) comprises a ceramic sleeve (22) and a film temperature sensing assembly positioned in the ceramic sleeve (22), the film temperature sensing assembly comprises an alumina framework (23) and a resistance carving wire (24) wound on the alumina framework (23), and the resistance carving wire (24) is connected with a lead (21) through a resistance lead (25).
6. The high temperature test chamber temperature sensor of claim 5, wherein: the resistance carving wire (24) is a platinum alloy coating wire formed on the alumina framework (23) through vapor deposition and laser micro-etching.
7. The high temperature test chamber temperature sensor of claim 5, wherein: the lead (21) is a pure silver lead.
8. The high temperature test chamber temperature sensor of claim 1, wherein: the temperature measuring element (2) and the lead (21) are fixed in the metal sleeve (1) through epoxy resin (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121469671.4U CN216116415U (en) | 2021-06-30 | 2021-06-30 | Temperature sensor of high-temperature test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121469671.4U CN216116415U (en) | 2021-06-30 | 2021-06-30 | Temperature sensor of high-temperature test chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216116415U true CN216116415U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121469671.4U Active CN216116415U (en) | 2021-06-30 | 2021-06-30 | Temperature sensor of high-temperature test chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216116415U (en) |
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2021
- 2021-06-30 CN CN202121469671.4U patent/CN216116415U/en active Active
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