Device for calibrating response time constant of thermocouple temperature sensor and use method

Abstract

The embodiment of the invention provides a device for calibrating a response time constant of a thermocouple temperature sensor and a use method, so as to calibrate the response time constant of the thermocouple temperature sensor. The device comprises a high-temperature and high-pressure air source module and an airflow rectification module, the high-temperature and high-pressure air source module comprises an air compressor, a booster pump, a high-pressure air storage tank, a pneumatic ball valve a, a pressure regulating valve, a flow regulating valve and an air heater, and all the parts are connected through pipelines; the airflow rectification module comprises a high-pressure buffer tank body, a pressure transmitter, a high-pressure buffer end cover, a gas guide port, a standard temperature sensor, a spray pipe, a temperature sensor mounting station, a high-frequency pressure sensor, a back pressure valve and a pneumatic ball valve b; and the gas heater is connected with the high-pressure buffer tank body through a pipeline.

Description

Technical Field

[0001] This application relates to the field of calibration of the response time constant of thermocouple temperature sensors, and specifically relates to a device and a usage method for calibrating the response time constant of thermocouple temperature sensors. Background Art

[0002] The airflow temperature fields generated by spacecraft launch devices and aircraft engines are rapidly changing, and fast-response thermocouples are usually used for measurement. The response speed of the thermocouple has a great influence on the accuracy of the measurement results. The thermocouple response time constant is an important indicator for measuring the response speed of the thermocouple to temperature changes. Among them, the temperature sensor to be calibrated is quickly put into the temperature field, and the time taken for the measured temperature value to rise from the initial level to 63.2% of the maximum value is measured, and this measured time value is the response time constant of the thermocouple temperature sensor.

[0003] However, at present, the methods for calibrating the thermocouple response time constant mainly include the water / oil bath method, the hot wind tunnel method, and the laser method. Among the above three methods, the mechanisms of the water / oil bath method and the hot wind tunnel method are molecular vibration heat conduction, and the mechanism of the laser method is laser radiation heat generation. The mechanisms of the water / oil bath method and the hot wind tunnel method are the same as the mechanism of the thermocouple for measuring gas temperature, but among the two methods, the excitation time of the hot wind tunnel method is faster than that of the water / oil bath method. In addition, the Beijing Institute of Metrology and Measurement Technology has developed a number of hot wind tunnels for calibrating the response time constant of temperature sensors, and uses a mechanical mechanism to quickly move to realize the excitation of the thermocouple temperature sensor by the hot air flow, and the fastest excitation time is about 20 milliseconds. Beihang University has proposed "a traceable dynamic gas temperature signal generating device", which uses a metal diaphragm to block between the high-temperature and high-pressure gas storage chamber and the low-pressure chamber, uses an axial flow fan to make the temperature field in the high-temperature and high-pressure gas storage chamber evenly distributed, uses the diaphragm rupture to generate a shock wave, and uses the shock wave effect to realize the rapid excitation of the thermocouple. However, since this device has no supplementary gas source, there are problems that it is difficult to control the pressure and temperature in the high-temperature and high-pressure chamber after the diaphragm breaks, and the pressure and temperature fields in the conical nozzle are unstable due to the shock wave effect, resulting in unstable excitation temperature of the thermocouple. Guizhou Aerospace Metrology and Measurement Technology Research Institute has proposed "a gas step temperature excitation device and its usage method", which seals the conical nozzle with a double diaphragm, evacuates the conical nozzle, and the heated high-temperature and high-pressure gas enters the high-pressure chamber. After the diaphragm breaks, the high-temperature and high-pressure gas quickly flows through the conical nozzle, thereby forming a step excitation for the thermocouple sensor, and the excitation time can be less than 1 millisecond. However, this device has relatively strict requirements for the design parameters of the front and rear diaphragms, and there is a risk of damaging the vacuum components in the high-temperature and high-pressure environment.

[0004] In view of the above problems, how to develop a safer and more reliable device for calibrating the response time constant of thermocouple temperature sensors is a problem that needs to be solved currently. Summary of the Invention

[0005] An embodiment of the present application provides a device and a usage method for calibrating the response time constant of a thermocouple temperature sensor to achieve the calibration of the response time constant of the thermocouple temperature sensor.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a device for calibrating the response time constant of a thermocouple temperature sensor, the device including: a high-temperature and high-pressure gas source module and an air flow rectification module, wherein,

[0008] The high-temperature and high-pressure gas source module includes an air compressor, a booster pump, a high-pressure gas storage tank, a pneumatic ball valve a, a pressure regulating valve, a flow regulating valve, and a gas heater, and each part is connected through pipelines. Among them, the booster pump is installed between the air compressor and the high-pressure gas storage tank, and the pneumatic ball valve a, the pressure regulating valve, and the flow regulating valve are sequentially installed between the high-pressure gas storage tank and the gas heater;

[0009] The air flow rectification module includes a high-pressure buffer tank body, a pressure transmitter, a high-pressure buffer end cover, a gas guiding port, a standard temperature sensor, a nozzle, a temperature sensor installation station, a high-frequency pressure sensor, a back pressure valve, and a pneumatic ball valve b. Among them, the pressure transmitter is installed on the high-pressure buffer tank body, the high-pressure buffer end cover is connected to the high-pressure buffer tank body through flange a, 3 standard temperature sensors and 3 gas guiding ports are installed on the high-pressure buffer end cover surface, the gas guiding port is connected to the back pressure valve and the pneumatic ball valve b through pipelines, the high-pressure buffer end cover is connected to the nozzle through flange b, and the high-frequency dynamic pressure sensor and the temperature sensor installation station are installed on the nozzle wall surface;

[0010] The gas heater and the high-pressure buffer tank body are connected through pipelines.

[0011] In a possible design, the device in the first aspect further includes a safety valve a installed on the high-pressure gas storage tank to ensure the safe use of the high-pressure gas storage tank.

[0012] In a possible design, the device in the first aspect further includes that 3 standard temperature sensors and 3 gas guiding ports are evenly distributed at 60-degree intervals on the same circumference of the high-pressure buffer end cover surface.

[0013] In a possible design, the device in the first aspect further includes that the nozzle is conical.

[0014] In a possible design, the device in the first aspect further includes that a throttle plate and an aluminum diaphragm are clamped between the flange b, wherein the throttle plate is close to the high-pressure buffer end cover side, and the aluminum diaphragm is in the shape of a "cross engraved line".

[0015] In a possible design solution, the device of the first aspect further includes that the installation position of the temperature sensor mounted on the wall surface of the spray pipe is at a position 180 degrees opposite to the high-frequency dynamic pressure sensor.

[0016] In a possible design solution, the device of the first aspect further includes that a one-way valve is installed between the temperature sensor installation position and flange b for introducing normal-temperature dry air.

[0017] In a possible design solution, the device of the first aspect further includes that a safety valve b is installed on the high-pressure buffer tank body to ensure the safe use of the high-pressure buffer tank body.

[0018] In a possible design solution, the device of the first aspect further includes that the air flow rectification module further includes a silencer. The silencer is connected to the pneumatic ball valve b and the spray pipe through a tee, and the silencer is used to reduce the noise generated by the discharged gas.

[0019] In the second aspect, a method for using a device for calibrating the response time constant of a thermocouple temperature sensor includes the following steps:

[0020] Step 1: Set the pressure regulating valve and the flow regulating valve, install the aluminum diaphragm, and open the back pressure valve and the pneumatic ball valve b;

[0021] Step 2: Turn on the air compressor and the booster pump; after charging the high-pressure gas storage tank to the set pressure, the air compressor and the booster pump are shut down;

[0022] Step 3: Open the pneumatic ball valve a at the rear of the high-pressure gas storage tank, and detect whether the flow rate meets the set value. If it does not meet the requirement, close the pneumatic ball valve a and readjust the parameters of the pressure regulating valve and the flow regulating valve. If it meets the requirement, proceed to the next step;

[0023] Step 4: Read the output value of the pressure transmitter and judge whether it meets the requirement. If it does not meet the requirement, adjust the parameter of the back pressure valve until the pressure indication meets the requirement. If it meets the requirement, proceed to the next step;

[0024] Step 5: Turn on the gas heater and load the control signal to make its power reach the set value;

[0025] Step 6: Read the output value of the standard temperature sensor on the end cover of the high-pressure buffer and judge whether it meets the requirement. Continuously read the output value of the standard temperature sensor until the set temperature requirement is met, and then proceed to the next step;

[0026] Step 7: Close the pneumatic ball valve b behind the back pressure valve, the pressure in the high-pressure buffer tank increases, and the aluminum diaphragm ruptures to complete the gas step temperature excitation.

[0027] In the embodiments of the present application, high-temperature and high-pressure gas rapidly enters the conical nozzle through the rupture of the aluminum diaphragm. The gas flow rate at the nozzle of the conical nozzle is consistent with the gas flow rate at the throttle orifice on the throttle plate, reducing the influence of the shock wave effect. The combination of a high-pressure gas source and an independent heater makes the gas flow supply more stable and convenient to operate, and the safety and reliability of the system are higher. By changing the size of the throttle orifice on the throttle plate and the nozzle of the conical nozzle, the excitation duration can be changed, and by changing the heating power of the heater, the gas temperature can be changed. The excitation conditions are convenient to control. The overall structure of the device is simple and occupies less space, having the advantages of low cost and miniaturization.

[0028] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of a device for calibrating the response time constant of a thermocouple temperature sensor provided by an embodiment of the present application;

[0031] Figure 2 It is a three-dimensional view of the high-pressure buffer tank body provided by an embodiment of the present application;

[0032] Figure 3 It is an installation schematic diagram of a back pressure valve and a pneumatic ball valve b provided by an embodiment of the present application;

[0033] Figure 4 It is a connection schematic diagram between the end cover of the high-pressure buffer and the nozzle provided by an embodiment of the present application;

[0034] Figure 5 It is a schematic flow diagram of the usage method of a device for calibrating the response time constant of a thermocouple temperature sensor provided by an embodiment of the present application;

[0035] Figure 6 It is a simulation cloud map at the moment of the stable state of the temperature field (1.3 ms) provided by an embodiment of the present application;

[0036] Description of the reference numerals: 1 - air compressor, 2 - booster pump, 3 - safety valve a, 4 - high-pressure gas storage tank, 5 - pneumatic ball valve a, 6 - pressure regulating valve, 7 - flow regulating valve, 8 - gas heater, 9 - high-pressure buffer tank body, 10 - pressure transmitter, 11 - high-pressure buffer end cover, 12 - gas guiding port, 13 - standard temperature sensor, 14 - throttle plate, 15 - aluminum diaphragm, 16 - nozzle, 17 - check valve, 18 - temperature sensor installation station, 19 - high-frequency pressure sensor, 20 - safety valve b, 21 - back pressure valve, 22 - pneumatic ball valve b, 23 - silencer. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this specification clearer, the following will clearly and completely describe the technical solutions in the embodiments of this specification with reference to the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are some but not all of the embodiments of this specification. The components of the embodiments of this specification described and illustrated herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this specification provided in the accompanying drawings is not intended to limit the scope of this specification that is claimed, but merely represents selected embodiments of this specification. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this specification without making creative efforts fall within the scope of protection of this specification.

[0039] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the embodiments of this specification, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing this specification 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 should not be construed as a limitation of this specification. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical", "hanging", etc. do not require the components to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the embodiments of this specification, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "install", "connect", "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this specification can be understood according to specific situations.

[0043] Next, the device for calibrating the response time constant of the thermocouple temperature sensor of the present application will be specifically introduced. This device aims to achieve a safer and more reliable calibration of the response time constant of the thermocouple temperature sensor.

[0044] Figure 1 It is a schematic structural diagram of the device for calibrating the response time constant of the thermocouple temperature sensor provided by the embodiments of the present application. As Figure 1 shown, the device for calibrating the response time constant of the thermocouple temperature sensor includes: a high-temperature and high-pressure gas source module and an air flow rectification module.

[0045] Among them, the high-temperature and high-pressure gas source module includes an air compressor 1, a booster pump 2, a high-pressure gas storage tank 4, a pneumatic ball valve a5, a pressure regulating valve 6, a flow regulating valve 7, and a gas heater 8. Each part is connected through pipelines. Among them, the booster pump 2 is installed between the air compressor 1 and the high-pressure gas storage tank 4, and the pneumatic ball valve a5, the pressure regulating valve 6, and the flow regulating valve 7 are sequentially installed between the high-pressure gas storage tank 4 and the gas heater 8.

[0046] The air flow rectification module includes a high-pressure buffer tank body 9, a pressure transmitter 10, a high-pressure buffer end cover 11, a gas guiding port 12, a standard temperature sensor 13, a nozzle 16, a temperature sensor installation station 18, a high-frequency pressure sensor 19, a back pressure valve 21, and a pneumatic ball valve b22. Among them, the pressure transmitter 10 is installed on the high-pressure buffer tank body 9, the high-pressure buffer end cover 11 and the high-pressure buffer tank body 9 are connected by flange a, 3 standard temperature sensors 13 and 3 gas guiding ports 12 are installed on the surface of the high-pressure buffer end cover 11. The gas guiding port 12 is connected to the back pressure valve 21 and the pneumatic ball valve b22 through pipelines. The high-pressure buffer end cover 11 and the nozzle 16 are connected by flange b, and the high-frequency dynamic pressure sensor and the temperature sensor installation station 18 are installed on the wall surface of the nozzle 16.

[0047] The gas heater 8 and the high-pressure buffer tank body 9 are connected by a pipeline.

[0048] It should be noted that for the high-temperature and high-pressure gas source module, the booster pump 2 is used to compress the output gas of the air compressor 1 and then fill it into the high-pressure gas storage tank 4. The pneumatic ball valve a5, the pressure regulating valve 6, and the flow regulating valve 7 are sequentially installed between the high-pressure gas storage tank 4 and the gas heater 8 to regulate and control the pressure and flow of the output gas.

[0049] In addition, the gas heater 8 is of adjustable power type and is used to heat high-pressure gas. Its built-in controller changes the heating power by receiving the magnitude of the control current signal.

[0050] It should be noted that for the air flow rectification module, as Figure 2 shown, the high-pressure buffer tank body 9 is a hollow cavity inside, which is divided into a tank body part and an end cover part. A pressure transmitter 10 is installed on the tank body to monitor the pressure condition in the high-temperature and high-pressure chamber; a standard temperature sensor 13 is used to monitor the gas temperature in the high-temperature and high-pressure chamber; the gas guiding port 12 is connected to the back pressure valve 21 and the pneumatic ball valve b22 through a pipeline for exhausting and maintaining pressure in the high-temperature and high-pressure chamber.

[0051] In addition, the gas guiding port 12 is connected to the back pressure valve 21 and the pneumatic ball valve b22 through a pipeline, and specific reference can be made to Figure 3 for understanding.

[0052] Optionally, a safety valve a3 is installed on the high-pressure gas storage tank 4 to ensure the safe use of the high-pressure gas storage tank 4.

[0053] Optionally, 3 standard temperature sensors 13 and 3 gas guiding ports 12 are evenly distributed at 60-degree intervals on the same circumference on the surface of the high-pressure buffer end cover 11, and specific reference can be made to Figure 3 for understanding.

[0054] Optionally, the nozzle 16 is conical and can also be of other shapes, such as bell-shaped, and can be designed into different structures according to its application scenario and performance requirements to meet different working conditions and performance objectives, which are not limited here.

[0055] Optionally, a throttle plate 14 and an aluminum diaphragm 15 are clamped between the flanges b. Among them, the throttle plate 14 is close to the side of the high-pressure buffer end cover 11, and the aluminum diaphragm 15 is of the "cross engraved line" type, and specific reference can be made to Figure 4 for understanding.

[0056] In addition, the aluminum diaphragm 15 being of the "cross engraved line" type is only an example, and other forms of engraved lines can also be designed, such as straight lines, grid lines, etc., which are not limited here.

[0057] Optionally, the installation station 18 of the temperature sensor mounted on the wall of the nozzle 16 is located 180 degrees opposite to the high-frequency dynamic pressure sensor.

[0058] Optionally, a one-way valve 17 is installed between the temperature sensor installation station 18 and the flange b for introducing normal-temperature dry air.

[0059] Optionally, a safety valve b 20 is installed on the high-pressure buffer tank body 9 to ensure the safe use of the high-pressure buffer tank body 9, for example, to ensure that its pressure does not exceed the safety upper limit.

[0060] Optionally, the airflow rectification module further includes a silencer 23. The silencer 23 is connected to the pneumatic ball valve b 22 and the nozzle 16 through a tee pipe, and the silencer 23 is used to reduce the noise generated by the discharged gas.

[0061] In summary, in this device, the high-temperature and high-pressure gas quickly enters the conical nozzle through the rupture of the aluminum diaphragm. The gas flow rate at the nozzle of the conical nozzle is consistent with the gas flow rate at the throttle orifice on the throttle plate, reducing the influence of the shock wave effect; the high-pressure gas source and the independent heater are combined to make the air flow supply more stable and easy to operate, and the safety and reliability of the system are higher; by changing the size of the throttle orifice on the throttle plate and the nozzle of the conical nozzle, the excitation duration can be changed, and by changing the heating power of the heater, the gas temperature can be changed. The excitation conditions are convenient to control. The overall structure of this device is simple and occupies less space, and it has the advantages of low cost and miniaturization.

[0062] The above combines Figures 1-4 This calibration device for the response time constant of the thermocouple temperature sensor provided by the embodiment of the present application is described in detail below. The following introduces the specific usage method of this calibration device for the response time constant of the thermocouple temperature sensor.

[0063] As Figure 5 shown, the usage method of this calibration device for the response time constant of the thermocouple temperature sensor includes the following steps:

[0064] Step 1: Set the pressure regulating valve 6 and the flow regulating valve 7, install the aluminum diaphragm 15, and open the back pressure valve 21 and the pneumatic ball valve b 22;

[0065] Step 2: Turn on the air compressor 1 and the booster pump 2; after charging the high-pressure gas storage tank 4 to the set pressure, the air compressor 1 and the booster pump 2 are shut down;

[0066] Step 3: Open the pneumatic ball valve a 5 at the rear of the high-pressure gas storage tank 4 to detect whether the flow rate meets the set value. If it does not meet, close the pneumatic ball valve a 5 and re-adjust the parameters of the pressure regulating valve 6 and the flow regulating valve 7. If it meets, proceed to the next step;

[0067] Step 4: Read the output value of the pressure transmitter 10 and determine whether it meets the requirements. If not, adjust the parameters of the back-pressure valve 21 until the pressure indication meets the requirements. If it meets the requirements, proceed to the next step;

[0068] Step 5: Open the gas heater 8 and load the control signal to make its power reach the set value;

[0069] Step 6: Read the output value of the standard temperature sensor 13 on the end cover 11 of the high-pressure buffer. Determine whether it meets the requirements, and continuously read the output value of the standard temperature sensor 13 until the set temperature requirement is met, and then proceed to the next step;

[0070] Step 7: Close the pneumatic ball valve b22 behind the back-pressure valve 21. The pressure in the high-pressure buffer tank 9 increases, and the aluminum diaphragm 15 ruptures, completing the gas step temperature excitation.

[0071] After completing the gas step temperature excitation, the device can calibrate the response time constant of the thermocouple temperature sensor. Figure 6 For the specific calibration, it is the simulation cloud diagram at the stable state moment (1.3 ms) of the temperature field. The time used for the measured temperature value in this diagram to rise from the initial level to 63.2% of the maximum value at 1.3 ms.

[0072] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the concept of this application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present application as described above, which are not provided in detail for the sake of brevity.

[0073] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An apparatus for calibrating the response time constant of a thermocouple temperature sensor, characterized in that The device includes: a high-temperature and high-pressure gas source module and an air flow rectification module; The high-temperature and high-pressure gas source module includes an air compressor, a booster pump, a high-pressure gas storage tank, a pneumatic ball valve a, a pressure regulating valve, a flow regulating valve, and a gas heater. Each part is connected by pipelines. Among them, the booster pump is installed between the air compressor and the high-pressure gas storage tank, and the pneumatic ball valve a, the pressure regulating valve, and the flow regulating valve are sequentially installed between the high-pressure gas storage tank and the gas heater; The air flow rectification module includes a high-pressure buffer tank body, a pressure transmitter, a high-pressure buffer end cover, a gas guiding port, a standard temperature sensor, a nozzle, a temperature sensor installation station, a high-frequency pressure sensor, a back pressure valve, and a pneumatic ball valve b. Among them, the pressure transmitter is installed on the high-pressure buffer tank body, the high-pressure buffer end cover is connected to the high-pressure buffer tank body through flange a, 3 standard temperature sensors and 3 gas guiding ports are installed on the high-pressure buffer end cover surface, the gas guiding port is connected to the back pressure valve and the pneumatic ball valve b through pipelines, the high-pressure buffer end cover is connected to the nozzle through flange b, and the high-frequency dynamic pressure sensor and the temperature sensor installation station are installed on the nozzle wall surface; The gas heater and the high-pressure buffer tank body are connected by pipelines.

2. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, wherein, A safety valve a is installed on the high-pressure gas storage tank to ensure the safe use of the high-pressure gas storage tank.

3. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, characterized in that, The 3 standard temperature sensors and the 3 gas guiding ports are evenly distributed at 60-degree intervals on the same circumference of the high-pressure buffer end cover surface.

4. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, wherein, The nozzle is conical.

5. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, wherein A throttle plate and an aluminum diaphragm are clamped between the flanges b. Among them, the throttle plate is close to the high-pressure buffer end cover side, and the aluminum diaphragm is of a "cross engraved line" type.

6. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, characterized in that, The temperature sensor installation station installed on the nozzle wall surface is at a position 180 degrees opposite to the high-frequency dynamic pressure sensor.

7. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, characterized in that, A one-way valve is installed between the temperature sensor installation station and the flange b to introduce normal-temperature dry air.

8. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, wherein A safety valve b is installed on the high-pressure buffer tank body to ensure the safe use of the high-pressure buffer tank body.

9. The device for calibrating the response time constant of a thermocouple temperature sensor according to claim 1, characterized in that, The air flow rectification module further includes a silencer. The silencer is connected to the pneumatic ball valve b and the nozzle through a tee pipe, and the silencer is used to reduce the noise generated by the discharged gas.

10. A method of using a device for calibrating the response time constant of a thermocouple temperature sensor, which is applied to the device for calibrating the response time constant of a thermocouple temperature sensor according to any one of claims 1-9, characterized in that, The usage method includes the following steps: Step 1, set the pressure regulating valve and the flow regulating valve, install the aluminum diaphragm, and open the back pressure valve and the pneumatic ball valve b; Step 2, turn on the air compressor and the booster pump; after inflating the high-pressure gas storage tank to the set pressure, the air compressor and the booster pump are shut down; Step 3, open the pneumatic ball valve a at the rear of the high-pressure gas storage tank, and detect whether the flow rate meets the set value. If it does not meet, close the pneumatic ball valve a, and re-adjust the parameters of the pressure regulating valve and the flow regulating valve. If it meets, proceed to the next step; Step 4, read the output value of the pressure transmitter, and judge whether it meets the requirements. If it does not meet, adjust the parameters of the back pressure valve until the pressure indication meets the requirements. If it meets, proceed to the next step; Step 5: Turn on the gas heater and load the control signal to make its power reach the set value; Step 6: Read the output value of the standard temperature sensor on the end cover of the high-pressure buffer, and judge whether it meets the requirements. Continuously read the output value of the standard temperature sensor until the set temperature requirement is met, and then proceed to the next step; Step 7: Close the pneumatic ball valve b behind the back pressure valve. The pressure in the high-pressure buffer tank rises, and the aluminum diaphragm ruptures, completing the gas step temperature excitation.

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