High-sensitivity temperature detection structure

Abstract

The utility model discloses a high sensitivity temperature detection structure, which relates to the technical field of material physical and chemical property test analysis and comprises a heater and a temperature sensor, a cavity is arranged in the heater, a gas circulation pipe and a framework are arranged in the cavity, a spiral heating pipe is wound on the outer side of the gas circulation pipe, and the temperature sensor is arranged in the cavity. The utility model discloses a high-sensitivity temperature detection structure, which comprises a gas circulation pipe, a heater and a framework, the two ends of the gas circulation pipe are fixed on the framework, the framework is tightly fixed on the wall of the cavity, and the temperature sensor is positioned at the outlet end of the heater, so that the problems of poor stability, low detection precision, easiness in damage, short service life and the like are solved. The purposes of good stability, high precision, long service life and intelligent control are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing and analyzing the physical and chemical properties of materials, in particular to a testing device. Background Art

[0002] The thermal shock tester system is used to test the material structure and its ability to withstand continuous extremely high and low temperatures in an instant. It can detect chemical changes or physical damage caused by thermal expansion and contraction of the sample in the shortest possible time.

[0003] A temperature sensor is installed near the outlet of the heating tube of the heating system to detect the air temperature. However, when high-pressure air flows through, the temperature sensor shakes unsteadily, and the air temperature detection data is unstable. When the shaking amplitude increases and the temperature sensor comes into contact with its surroundings, the accuracy of air temperature detection is disturbed. For example, the Chinese patent with the announcement number CN218675151U discloses a test head and a hot and cold shock device for a hot and cold shock device, and provides the following technical scheme: the utility model relates to a test head and a hot and cold shock device for a hot and cold shock device, comprising a shell, a vortex device arranged inside the shell for processing compressed air to generate hot and cold air, a heating device arranged inside the shell, and a nozzle connected to the air outlet end of the heating device, the vortex device has an air inlet, a cold air outlet and a hot air outlet, the air inlet end of the heating device is connected to the cold air outlet, and the shell is also provided with an insulation layer wrapped around the vortex device and the heating device, an air inlet pipe connected to the air inlet and used to supply compressed gas, an exhaust pipe connected to the hot air outlet at one end, the other end of the exhaust pipe passes through the insulation layer and extends to the outside of the insulation layer, and the other end of the exhaust pipe is provided with a silencer. The utility model discharges the hot air generated by the vortex device in an orderly manner, which not only avoids affecting the operation of the vortex device and the heating device, but also reduces the equipment cost, and also facilitates the arrangement of a silencer to eliminate noise and reduce noise pollution. However, the test head and hot and cold shock equipment of the above structure are easily damaged by the temperature sensor under the impact of high-speed airflow and the detection data is unstable. When it touches other components, it will also interfere with the accuracy of air temperature detection. Utility Model Content

[0004] In view of the problems of poor stability, low detection accuracy, easy damage, short service life and the like described in the background technology, the utility model proposes a high-sensitivity temperature detection structure, which achieves the goals of good stability, high accuracy, long service life and intelligent control.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-sensitivity temperature detection structure, including a heater with a cavity inside and a temperature sensor, a gas circulation tube and a skeleton are provided in the cavity, a spiral heating tube is surrounded by the outside of the gas circulation tube, both ends of the gas circulation tube are fixed on the skeleton, the skeleton is tightly fixed on the wall of the cavity, and the temperature sensor is located at the outlet end of the heater.

[0006] The advantage of this design is that by placing the temperature sensor at the outlet of the heater, changes in air temperature can be sensed in a timely manner. After the air in the heater is heated, the temperature will increase significantly, and the position of the temperature sensor can accurately measure this change. At the same time, the design of the gas circulation tube and the frame can ensure that the air flows smoothly and is stably conducted to the temperature sensor.

[0007] Preferably, an outlet connecting thread is provided at the outlet end of the heater, an inlet connecting thread is provided at the inlet end of the heater, an inlet cavity is provided between the inlet connecting thread and the skeleton, and an outlet cavity is provided between the outlet connecting thread and the skeleton.

[0008] The advantage of this design is that by setting connection threads at the outlet and inlet of the heater, other equipment or pipelines can be easily connected. This connection method makes the system more flexible and can be expanded or changed according to actual needs.

[0009] Preferably, the end of the temperature sensor is located at the end of the gas circulation pipe, the front end temperature measuring head of the temperature sensor is directly exposed in the outlet cavity, and the temperature sensor adopts an integrated design.

[0010] The advantage of this design is that the integrated design of the temperature sensor allows the temperature measuring head to be directly exposed in the cavity without contacting other components such as the heating tube, preventing interference and contact with the air flowing through, thereby improving the accuracy and sensitivity of temperature detection. At the same time, the end of the temperature sensor is located at the end of the gas circulation tube, which can better sense the temperature changes of the air flowing through.

[0011] Preferably, a sensor through hole is provided in the center of the skeleton, and the temperature sensor is fixed on the sensor through hole.

[0012] The advantage of this design is that the setting of the sensor through hole can fix the temperature sensor on the frame, thereby enhancing the stability and reliability of the structure. The location of the sensor through hole is selected in the center of the frame, which can better protect the temperature sensor and avoid external interference or damage.

[0013] Preferably, a plurality of flow holes are radially distributed on the frame, and the flow holes are radially distributed with the sensor through hole as the center point.

[0014] The advantage of this design is that by radiating a number of flow holes on the frame, the air circulation channels can be increased, and the fluidity and uniformity of the air can be improved. The flow holes are radially distributed with the sensor through hole as the center point, which can better maintain the air circulation and uniform temperature distribution.

[0015] Preferably, the temperature sensor is 8 mm-12 mm away from the outlet end of the heater.

[0016] The advantage of this design is that by controlling the distance between the temperature sensor and the heater outlet, the temperature sensor can more accurately sense changes in air temperature. Too far or too close a distance may affect the accuracy of temperature detection, and the distance of 8mm-12mm is a choice made after experimentation, which can better balance accuracy and response speed.

[0017] Preferably, the frame is made of ceramic and the heater shell is made of stainless steel.

[0018] The advantage of this design is that the ceramic skeleton has good insulation and high temperature resistance, which can effectively protect the temperature sensor and improve the stability and durability of the system. The stainless steel heater shell has good corrosion resistance and thermal conductivity, which can better maintain the working efficiency and temperature stability of the heater.

[0019] Preferably, a detection port is provided on the outside of the heater near the inlet end.

[0020] The advantage of such a design is that a detection port is provided on the outside of the heater near the inlet end for detecting the device and placing the wiring harness connected thereto.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The structure adopts an integrated design, exposing the temperature sensor directly in the cavity, thereby improving the accuracy and sensitivity of temperature detection. The temperature sensing point of the temperature sensor is completely in the air, unaffected by the temperature of other components, and can more accurately sense changes in air temperature. This high-precision temperature detection can provide accurate temperature feedback for the control system and achieve precise temperature control, thereby meeting the temperature requirements of various application scenarios.

[0023] 2. The design of this structure focuses on the uniformity and stability of air circulation. By radiating a number of circulation holes on the frame and radiating them with the sensor through hole as the center point, the air circulation channels are effectively increased, and the fluidity and uniformity of the air are improved. This uniform air circulation can make the temperature distribution more uniform and avoid measurement errors caused by local temperature unevenness. At the same time, the ceramic material of the frame and the choice of stainless steel shell ensure the stability and durability of the structure, and can operate stably in harsh working environments.

[0024] 3. The structure also takes into account the convenience and flexibility in practical applications. By setting connection threads at the outlet and inlet ends of the heater, it is convenient to connect with other equipment or pipelines, making the system more flexible. This convenience and flexibility makes the structure suitable for a variety of different application scenarios and can meet the needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0026] Figure 2 This is an overall cross-sectional view of an embodiment of the utility model;

[0027] Figure 3 It is a partial enlarged view of the overall cross-sectional view of an embodiment of the utility model;

[0028] Figure 4 This is a partial cross-sectional view of the skeleton of an embodiment of the utility model.

[0029] Illustration: heater 1, outlet connecting thread 2, inlet connecting thread 3, detection port 4, frame 5, sensor through hole 5.1, flow hole 5.2, temperature sensor 6, heating tube 7, gas flow tube 8, temperature measuring head 9. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings. The proportions of the components are not drawn according to the actual proportions, and the proportions and sizes shown in the accompanying drawings should not limit the substantial technical scheme of the present utility model. These embodiments do not describe all the details in detail, nor do they limit the present utility model to only the specific embodiments described.

[0031] See also Figure 1-4As shown, a high-sensitivity temperature detection structure includes a heater with a cavity inside and a temperature sensor, a gas circulation tube and a skeleton are provided in the cavity, a spiral heating tube is surrounded on the outside of the gas circulation tube, both ends of the gas circulation tube are fixed on the skeleton, the skeleton is tightly fixed on the wall of the cavity, and the temperature sensor is located at the outlet end of the heater.

[0032] The utility model device can be applied to the hot and cold shock system and the hot and cold shock instrument system, and is used to test the material structure, and the degree of tolerance in the continuous environment of extremely high temperature and extremely low temperature in an instant, so as to detect the chemical changes or physical damage caused by thermal expansion and contraction of the sample in the shortest time. Because high-pressure air flow often occurs, when the high-pressure air flow passes, the temperature sensor will vibrate unstably, and the air temperature detection data will be unstable; and when the vibration amplitude increases and the temperature sensor contacts with its surrounding components, the accuracy of air temperature detection will be interfered.

[0033] like Figure 1 In one embodiment shown, Figure 1 The schematic diagram of the structure of an embodiment of the utility model. The high-sensitivity temperature detection structure designed by the utility model includes a heater with a cavity inside and a temperature sensor. A gas circulation tube and a frame are arranged inside the cavity, and a heating tube is surrounded on the outside of the gas circulation tube. Both ends of the gas circulation tube are fixed on the frame, and the frame is tightly fixed on the wall of the cavity. The temperature sensor is located at the outlet end of the heater, and the outlet end of the heater is provided with an outlet connecting thread, and an outlet cavity is provided between the outlet connecting thread and the frame. A detection port is also arranged on the outside of the heater near the inlet end.

[0034] The advantage of this design is that it can provide highly sensitive temperature detection. Through the combination of the heater and the temperature sensor, accurate perception and monitoring of temperature changes can be achieved. The setting of the gas circulation tube and the skeleton in the cavity allows the gas to circulate fully, thereby ensuring that the temperature sensor can accurately sense the temperature changes of the environment. The surrounding design of the heating tube can improve the heating effect of the heater and further enhance the accuracy of temperature detection. In addition, the setting of the outlet connection thread and the outlet cavity can easily connect the temperature detection structure with other equipment or systems to realize the transmission and application of temperature data. The establishment of the detection port facilitates the installation of the wiring harness, so that the data of the temperature sensor can be smoothly received. According to the data of the temperature sensor, the heating situation can be changed accordingly as needed, which facilitates the data transmission and control of the entire structure. This highly sensitive temperature detection structure can be widely used in various fields that require accurate temperature monitoring, such as temperature control in industrial production processes, environmental monitoring, medical equipment, etc., especially in the hot and cold shock instrument system. Its reliable performance and flexible installation method make it highly practical and applicable.

[0035] Because the specific heat capacity of air is small, the temperature changes quickly. After the low-temperature air (-80℃) enters the heater, it can be heated to above 225℃ through the heating tube to the heater outlet. The maximum air flow rate can reach 500L per minute, and the temperature changes very quickly. With the integrated temperature sensor, the temperature sensing point of the sensor is completely exposed to the air and is not affected by the temperature of other components. In addition, the temperature detection sensitivity of this design is high, which can quickly sense the change of air temperature, adjust the control output, and quickly reach the required control temperature.

[0036] like Figure 2 In one embodiment shown, Figure 2 The figure is an overall cross-sectional view of an embodiment of the utility model. The utility model is designed to be a highly sensitive temperature detection structure, comprising a heater with a cavity inside and a temperature sensor. In the cavity, there is a gas circulation tube and a frame, and the outer side of the gas circulation tube is surrounded by a heating tube. Both ends of the gas circulation tube are fixed to the frame, and the frame is tightly fixed to the wall of the cavity, and the temperature sensor is located at the outlet end of the heater.

[0037] An inlet connecting thread is arranged at the inlet end of the heater, an inlet cavity is arranged between the inlet connecting thread and the frame, and an outlet cavity is arranged between the outlet connecting thread and the frame.

[0038] The benefit of the inlet and outlet cavities is that they can improve the sensitivity and accuracy of the temperature detection structure. First, by setting cavities at the inlet and outlet positions of the heater, the gas can fully contact the heater during the flow process and reach a state of equilibrium. This ensures that the temperature sensor can accurately measure the temperature of the gas flowing out of the heater, thereby improving the accuracy of temperature detection. Secondly, the inlet and outlet cavities can also play a role in heat insulation and reduce the interference of external environmental factors on temperature measurement. By setting cavities at the inlet and outlet cavities, the influence of the external environment can be effectively isolated, and the influence of external temperature changes on the temperature detection results can be avoided, thereby improving the stability of the measurement. The setting of the inlet and outlet cavities can improve the sensitivity and accuracy of the temperature detection structure, while reducing the interference of the external environment, thereby improving the accuracy and stability of temperature measurement.

[0039] The utility model has the following advantages and uses for a high-sensitivity temperature detection structure:

[0040] 1. High sensitivity: The heater is closely integrated with the temperature sensor, which can quickly sense temperature changes and has high sensitivity. This is very important for applications that require precise monitoring and control of temperature;

[0041] 2. Stability: The skeleton is tightly fixed on the cavity wall, making the entire structure more stable, which can effectively prevent the temperature sensor from being disturbed by the outside world and provide reliable temperature detection results;

[0042] 3. Integrated design: The temperature sensor adopts an integrated design, which simplifies the structure, reduces the failure rate, and is easy to install and maintain. The temperature sensing point of the sensor is completely exposed to the air and is not affected by the temperature of other components;

[0043] 4. Durability: The frame is made of ceramic and the heater shell is made of stainless steel, which has good high temperature resistance and corrosion resistance and can adapt to working conditions in various harsh environments.

[0044] This highly sensitive temperature detection structure is suitable for many fields, such as industrial production, laboratory research, medical equipment, etc. It can be used to monitor and control the temperature changes of various liquids, gases or solids, provide accurate temperature data, and provide effective support for related applications. Whether it is an industrial process that requires high-precision temperature monitoring or an experimental study that requires precise temperature control, this design can provide a reliable temperature detection solution.

[0045] like Figure 3 In one embodiment shown, Figure 3 This is a partial enlarged view of the overall cross-sectional view of an embodiment of the utility model. The utility model is designed to design a high-sensitivity temperature detection structure, which includes a heater with a cavity inside and a temperature sensor. In the cavity, a gas circulation tube and a skeleton are set. The skeleton adopts a ceramic skeleton. A spiral heating tube is surrounded by the outside of the gas circulation tube, and both ends of the gas circulation tube are fixed on the skeleton. The skeleton is tightly connected to the wall of the cavity. The temperature sensor is located at the outlet end of the heater. The outlet end of the heater has an outlet connecting thread, and an outlet cavity is provided between the outlet connecting thread and the skeleton. The end of the temperature sensor is located at the end of the gas circulation tube, and the temperature measuring head at its front end is directly exposed in the outlet cavity. The temperature sensor adopts an integrated design. The distance between the temperature sensor and the outlet end of the heater is 8mm-12mm. In this embodiment, the temperature sensor is located 10mm inside the outlet end of the heater. Finally, the experiment measured that the hole gas temperature output is stable, and the temperature difference is about ±0.2℃.

[0046] The design of this high-sensitivity temperature detection structure has many advantages, making it have a wide range of application prospects in practical applications. First, the structure adopts an integrated temperature sensor, which simplifies the structure and improves the stability and reliability of the system. The integrated design reduces potential failure points and improves the performance of the entire system. In addition, the integrated design can also reduce costs, reduce the complexity of manufacturing and maintenance, and make the temperature sensing point of the temperature sensor completely exposed to the air, unaffected by the temperature of other components. Secondly, the ceramic skeleton is used as the supporting material of the structure, which has good high temperature resistance and mechanical strength. Ceramic materials can maintain a stable shape under high temperature conditions, are not easy to deform or crack, and ensure the stability and reliability of the entire structure. This material also has corrosion resistance and long life characteristics, and can be used for a long time in harsh working environments. In addition, the design of the gas circulation tube and the heating tube in the structure is also worth noting. A spiral heating tube surrounds the outside of the gas circulation tube, and the gas is heated by the heating tube to achieve temperature control and regulation. This design can provide a uniform heating effect and improve the sensitivity of the temperature sensor to temperature changes. Finally, the distance between the temperature sensor and the outlet end of the heater in the structure has been experimentally optimized and set to 8mm-12mm. It has been experimentally verified that this distance can provide a stable temperature output with a temperature difference of about ±0.2℃. This means that the structure has high-precision and high-reliability temperature detection capabilities. In summary, the design of this high-sensitivity temperature detection structure fully considers the stability, reliability and accuracy requirements of the structure. Through the integrated design and the use of ceramic materials, the structure has high stability and high temperature resistance. At the same time, by optimizing the distance between the temperature sensor and the outlet end of the heater, high-precision temperature detection is achieved. This design has potential application value in many fields.

[0047] like Figure 4 In one embodiment shown, Figure 4The figure is a partial cross-sectional view of the skeleton of an embodiment of the utility model. A sensor through hole is provided in the center of the skeleton of the high-sensitivity temperature detection structure designed by the utility model, and the temperature sensor is fixed on the sensor through hole. At the same time, a number of flow holes are radially distributed on the skeleton, and these flow holes are radially distributed with the sensor through hole as the center point. The advantage of this structural design is that by setting the sensor through hole in the center of the skeleton, the temperature sensor can be fixed in a stable position, avoiding the influence of the position change of the sensor on the temperature measurement. The sensor through hole provides a fixed position, so that the temperature sensor can accurately sense the temperature at the end of the gas circulation tube. In addition, the flow holes on the skeleton are radially distributed with the sensor through hole as the center point. This design can promote the circulation of gas and increase the uniform distribution of temperature. Through the setting of the flow hole, the gas can flow better inside the skeleton, so that the temperature sensor can more accurately sense the temperature change of the gas. Therefore, the design of the sensor through hole and the flow hole in the structure helps to improve the accuracy and stability of temperature measurement. The sensor is fixed in the sensor through hole to ensure the consistency of the measurement position, and the setting of the flow hole helps the gas circulation and the uniform distribution of temperature. This design can improve the performance of the entire temperature detection system and is suitable for various application scenarios that require high-sensitivity temperature measurement.

[0048] In summary, this high-sensitivity temperature detection structure has a unique design and many advantages. First, the integrated temperature sensor is used to simplify the structure, improve stability and reliability, and is directly exposed to the air with high detection accuracy. Secondly, the sensor through hole in the center of the skeleton fixes the temperature sensor to ensure the consistency of the measurement position. At the same time, the radially distributed flow holes on the skeleton promote gas circulation and uniform temperature distribution. In addition, the ceramic skeleton in the structure has high temperature resistance and mechanical strength, and can be used for a long time in harsh environments. Experimental results show that the structure can achieve high-precision and stable temperature output. This high-sensitivity temperature detection structure is suitable for hot and cold shock systems, hot and cold shock instrument systems, and fields where temperature change testing is required. It can quickly sense temperature changes, provide high-precision temperature data, and meet the needs of temperature control. In general, this design has the advantages of high sensitivity, stability and durability, is suitable for various application scenarios, and provides an effective temperature detection solution for related applications.

[0049] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. A high-sensitivity temperature detection structure, characterized in that: The invention comprises a heater (1) having a cavity therein and a temperature sensor (6), wherein a gas circulation tube (8) and a frame (5) are provided in the cavity, a spiral heating tube (7) surrounds the outside of the gas circulation tube, both ends of the gas circulation tube are fixed to the frame (5), the frame (5) is tightly fixed to the wall of the cavity, and the temperature sensor (6) is located at the outlet end of the heater (1).

2. A high-sensitivity temperature detection structure according to claim 1, characterized in that: The outlet end of the heater (1) is provided with an outlet connection thread (2), the inlet end of the heater (1) is provided with an inlet connection thread (3), an inlet cavity is provided between the inlet connection thread (3) and the frame (5), and an outlet cavity is provided between the outlet connection thread (2) and the frame (5).

3. A high-sensitivity temperature detection structure according to claim 2, characterized in that: The end of the temperature sensor (6) is located at the end of the gas circulation pipe (8), the front end temperature measuring head (9) of the temperature sensor (6) is directly exposed in the outlet cavity, and the temperature sensor (6) adopts an integrated design.

4. A high-sensitivity temperature detection structure according to any one of claims 1 to 3, characterized in that: A sensor through hole (5.1) is provided in the centre of the skeleton (5), and the temperature sensor (6) is fixed on the sensor through hole (5.1).

5. A high-sensitivity temperature detection structure according to claim 4, characterized in that: A plurality of flow holes (5.2) are radially distributed on the skeleton (5), and the flow holes (5.2) are radially distributed with the sensor through hole (5.1) as the centre point.

6. A high-sensitivity temperature detection structure according to any one of claims 1 to 3, characterized in that: The temperature sensor (6) is 8 mm to 12 mm away from the outlet end of the heater (1).

7. A high-sensitivity temperature detection structure according to claim 5, characterized in that: The frame (5) is made of a ceramic frame, and the outer shell of the heater (1) is made of stainless steel.

8. A high-sensitivity temperature detection structure according to claim 1, characterized in that: A detection port (4) is provided on the outside of the heater (1) near the inlet end.

Images