Device for testing heat insulation performance of high-temperature-resistant valve coating

Abstract

The utility model discloses a heat insulation performance testing device for a high temperature resistant valve coating, a tested valve is an ultra-high temperature resistant valve, the surface of an internal cavity of the tested valve is coated with a high temperature heat insulation coating, the testing device comprises an inert gas generator, a temperature sensor, a temperature sensor and a temperature sensor, the heating passages are used for heating the inert gas to the temperature of a preset level, and the heated inert gas passes through the inner cavity of the high-temperature-resistant valve; the first temperature sensor is used for being arranged on a valve body of the tested valve; the second temperature sensor is used for being arranged at an outlet of the tested valve; and the at least one other temperature sensor is used for being arranged at the inlet of the tested valve. According to the utility model, whether the heat insulation performance of the tested valve is good or not can be obtained by comparing whether the values of the three temperature sensors are within a preset range or not.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature resistant valves, and in particular to a device for testing the heat insulation performance of a high-temperature resistant valve coating. Background Art

[0002] At present, people coat heat insulation materials inside the valve to form a high-temperature heat insulation coating to isolate high-temperature air and valve metal materials. This high-temperature heat insulation coating can protect the high-temperature structural materials of the valve from high-temperature corrosion and has been widely used in many fields such as aerospace.

[0003] In the process of developing a high-temperature resistant valve coating, how to test the heat insulation performance of the high-temperature resistant valve coating is an urgent problem to be solved. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems in the related art to some extent. For this reason, an object of the utility model is to provide a device for testing the heat insulation performance of a high-temperature resistant valve coating.

[0005] The technical solution adopted by the utility model is as follows:

[0006] In a first aspect, the utility model provides a device for testing the heat insulation performance of a high-temperature resistant valve coating. The valve to be tested is a super high-temperature resistant valve, and the surface of the internal cavity of the valve to be tested is coated with a high-temperature heat insulation coating. Among them, the testing device includes: an inert gas generator for outputting inert gas; a heating path for heating the inert gas to a preset temperature level respectively, and the heated inert gas passes through the internal cavity of the high-temperature resistant valve; a first temperature sensor for being arranged on the valve body of the valve to be tested; a second temperature sensor for being arranged at the outlet of the valve to be tested; and at least one other temperature sensor for being arranged at the inlet of the valve to be tested.

[0007] Among them, the heating path includes multiple heating paths arranged in parallel. The multiple heating paths include: a first heating branch including a tubular heater for heating the inert gas to not less than 800 °C; a second heating branch including a plasma torch for heating the inert gas to not less than 2000 °C.

[0008] Among them, the first heating branch further includes: a first solenoid valve and a first pressure reducing valve, and the first solenoid valve and the first pressure reducing valve are sequentially arranged in series between the inert gas generator and the tubular heater.

[0009] Among them, the second heating branch further includes: a second solenoid valve and a second pressure reducing valve, and the second solenoid valve and the second pressure reducing valve are sequentially arranged in series between the inert gas generator and the plasma torch.

[0010] Among them, it further includes: a heat exchanger, which includes a first inlet, a first outlet, a second inlet, and a second outlet; the first inlet of the heat exchanger is used to connect to the outlet of the valve under test, and the first outlet of the heat exchanger is used to discharge the cooled inert gas.

[0011] Among them, it further includes: a chiller, which includes a first inlet, a second inlet, a first outlet, and a second outlet;

[0012] The first inlet and the first outlet of the chiller are used to connect to the heat exchanger respectively; the second inlet and the second outlet of the chiller are used to connect to the plasma torch respectively.

[0013] Among them, a third solenoid valve is arranged between the first outlet of the chiller and the second inlet of the heat exchanger; a fourth solenoid valve is arranged between the first inlet of the chiller and the second outlet of the heat exchanger.

[0014] Among them, the plasma torch includes a first inlet, a first outlet, a second inlet, and a second outlet; a fifth solenoid valve is arranged between the second outlet of the chiller and the second inlet of the plasma torch; a sixth solenoid valve is arranged between the second inlet of the chiller and the second outlet of the plasma torch.

[0015] Among them, it further includes: a first pressure sensor, which is used to be arranged at the outlet of the tubular heater; a second pressure sensor, which is used to be arranged at the first outlet of the plasma torch.

[0016] Among them, it further includes: a fixed platform, which is used to fix the valve under test.

[0017] The beneficial effects of the present utility model are:

[0018] The present utility model heats the inert gas through a heating path, then sends the heated inert gas into the internal cavity of the high-temperature resistant valve, and then respectively sets a temperature sensor at the inlet, outlet, and valve body of the high-temperature resistant valve to detect the temperature. By comparing whether the values of these three temperature sensors are within a predetermined range, it can be determined whether the heat insulation performance of the valve under test is good.

[0019] Furthermore, the heating path of the present utility model includes a plurality of parallel heating branches, so that the heat insulation performance of the valve under test can be tested in different temperature ranges in segments. For example, the heat insulation performance of the valve under test can be tested below 800°C and below 2000°C. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a device for testing the heat insulation performance of a coating of a high-temperature resistant valve of the present utility model. Detailed Embodiments

[0021] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0022] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a heat insulation performance testing device for a high-temperature resistant valve coating of the present utility model. As Figure 1 shown, the valve under test is a super high-temperature resistant valve, and the surface of the inner cavity of the valve under test is coated with a high-temperature heat insulation coating. The present utility model is used to test whether the heat insulation performance of the coating of the valve under test reaches the ideal target value.

[0023] As Figure 1 shown, the testing device includes an inert gas generator 1, a first heating branch and a second heating branch, a first temperature sensor 8, a second temperature sensor 9, a third temperature sensor 10, and a fourth temperature sensor 11.

[0024] The inert gas generator 1 is used to output inert gas, and the inert gas is used as a medium for heat conduction. Preferably, the inert gas is nitrogen. A manual valve is provided on the inert gas generator 1, and the inert gas can be opened or closed.

[0025] The first heating branch and the second heating branch are arranged in parallel, and are used to heat the inert gas output by the inert gas generator 1 to a preset temperature level respectively, and the heated inert gas passes through the inner cavity of the valve under test.

[0026] The first heating branch includes a tubular heater 2, and the tubular heater 2 is used to heat the inert gas to a maximum of 800 °C. Preferably, the first heating branch further includes a first solenoid valve 3 and a first pressure reducing valve 4. The first solenoid valve 3 and the first pressure reducing valve 4 are sequentially connected in series between the inert gas generator and the tubular heater. The first solenoid valve 3 is used to open or close the intake air source of the tubular heater 2. The first pressure reducing valve 4 is used to reduce the gas pressure of the intake air source of the tubular heater 2 to below 1 MPa.

[0027] The second heating branch includes a plasma torch 5, and the plasma torch 5 is used to heat the inert gas to a maximum of 2000 °C. Preferably, the second heating branch further includes a second solenoid valve 6 and a second pressure reducing valve 7. The second solenoid valve 6 and the second pressure reducing valve 7 are sequentially connected in series between the inert gas generator and the plasma torch. The second solenoid valve 6 is used to open or close the intake air source of the plasma torch 5. The second pressure reducing valve 7 is used to reduce the gas pressure of the intake air source of the plasma torch 5 to below 0.2 MPa.

[0028] The first temperature sensor 8 is arranged on the valve body of the valve under test, and is used to detect the temperature of the valve body.

[0029] The second temperature sensor 9 is arranged at the outlet of the valve to be measured and is used to detect the temperature at the outlet of the valve to be measured.

[0030] The third temperature sensor 10 and the fourth temperature sensor 11 are both arranged at the inlet of the valve to be measured and are used to detect the temperature at the inlet of the valve to be measured. It should be noted here that the reason for arranging two temperature sensors, namely the third temperature sensor 10 and the fourth temperature sensor 11, at the inlet of the valve to be measured is that since the outlet temperatures of the first heating branch and the second heating branch are quite different, the pipes used for the connection between the outlet of the first heating circuit and the inlet of the valve to be measured are different from those used for the connection between the outlet of the second heating circuit and the inlet of the valve to be measured. Therefore, a temperature sensor needs to be arranged at the inlet where each heating branch is connected to the valve to be measured.

[0031] In other embodiments, only one heating branch (for example, only the aforementioned first heating branch or the second heating branch) can also be arranged, or three or more heating branches can be arranged. The number of heating branches is not limited herein and is determined according to the heating segmentation intervals of the inert gas, that is, the number of heating branches is the same as the number of heating segmentation intervals of the inert gas.

[0032] Preferably, the test device further includes a heat exchanger 12, which includes a first inlet (not marked in the figure), a first outlet (not marked in the figure), a second inlet (not marked in the figure), and a second outlet (not marked in the figure); the first inlet of the heat exchanger 12 is connected to the outlet of the valve to be measured, and the first outlet of the heat exchanger 12 is used to discharge the cooled inert gas. The heat exchanger 12 is used to cool the high-temperature gas and then discharge it.

[0033] Preferably, the test device further includes a chiller 13, which includes a first inlet (not marked in the figure), a second inlet (not marked in the figure), a first outlet (not marked in the figure), and a second outlet (not marked in the figure). The first inlet and the first outlet of the chiller 13 are respectively connected to the heat exchanger 12, and the second inlet and the second outlet of the chiller 13 are respectively connected to the plasma torch 5. The chiller 13 is the cold water source for the heat exchanger 12 and the plasma torch 5.

[0034] Optionally, a third solenoid valve 14 is provided between the first outlet of the chiller 13 and the second inlet of the heat exchanger 12; a fourth solenoid valve 15 is provided between the first inlet of the chiller 13 and the second outlet of the heat exchanger 12. The plasma torch 5 includes a first inlet, a first outlet, a second inlet, and a second outlet. A fifth solenoid valve 16 is provided between the second outlet of the chiller 13 and the second inlet of the plasma torch 5; a sixth solenoid valve 17 is provided between the second inlet of the chiller 13 and the second outlet of the plasma torch 5. It should be noted here that the function of the third solenoid valve 14 is to open or close the water outlet of the first outlet of the water chiller 13 (the second inlet of the heat exchanger 12). The function of the fourth solenoid valve 15 is to open or close the water inlet of the first inlet of the water chiller 13 (the second inlet of the heat exchanger 12). The function of the fifth solenoid valve 16 is to open or close the water outlet of the second outlet of the water chiller 13 (the second inlet of the plasma torch 5). The function of the fifth solenoid valve 16 is to open or close the water inlet of the second inlet of the water chiller 13 (the second inlet of the plasma torch 5).

[0035] Preferably, the test device further includes a first pressure sensor 18 and a second pressure sensor 19. The first pressure sensor 18 is disposed at the outlet of the tubular heater 2, and the second pressure sensor 19 is disposed at the first outlet of the plasma torch 5. The outlet of the tubular heater 2 and the first outlet of the plasma torch 5 are the inlets of the valve under test. The first pressure sensor 18 is used to measure the gas pressure at the outlet of the tubular heater 2, and the second pressure sensor 19 is used to measure the gas pressure at the first outlet of the plasma torch 5.

[0036] In addition, the test device further includes a fixed platform 20 for fixing the valve under test.

[0037] The working method of the present utility model is as follows:

[0038] Fix the valve under test on the fixed platform 20. In the initial state, all valves and instruments are in the closed state. Connect the inlet of the valve under test to the outlet of the heating path, and connect the outlet of the valve under test to the first inlet of the heat exchanger. Dispose the three temperature sensors and the two pressure sensors at the aforementioned positions respectively.

[0039] (1) If it is necessary to test the heat insulation performance of the coating of the valve under test below 800 °C: First, open the manual valve of the inert gas generator 1, open the first solenoid valve 3, the first pressure reducing valve 4 and the tubular heater 2, observe and adjust the first pressure reducing valve 4 to adjust the pressure to 1 MPa. Then open the valve under test and the heat exchanger 12. As the temperature gradually rises, record the values of the first temperature sensor 8, the second temperature sensor 9 and the third temperature sensor 10 respectively. By comparing whether the temperature values of the three temperature sensors are within the predetermined range, it is determined whether the heat insulation performance of the coating of the valve under test is good.

[0040] (2) If it is necessary to test the heat insulation performance of the coating of the valve under test below 2000 °C: First, open the manual valve of the inert gas generator 1, open the second solenoid valve 6, the second pressure reducing valve 7 and the plasma torch 5, observe and adjust the second pressure reducing valve 7 to adjust the pressure to 0.2 MPa. Then open the valve under test, the heat exchanger 12 and the chiller 13. As the temperature gradually rises, record the values of the first temperature sensor 8, the second temperature sensor 9 and the fourth temperature sensor 11 respectively. By comparing whether the temperature values of the three temperature sensors are within the predetermined range, it is determined whether the heat insulation performance of the coating of the valve under test is good.

[0041] It can be understood that since the valve body of the valve under test does not contact high-temperature gas, if the heat insulation performance of the coating of the valve under test is good, the temperature measured by the first temperature sensor 8 provided on the valve body of the valve under test should be less than the temperatures of the second temperature sensor 9, the third temperature sensor 10 and the fourth temperature sensor 11. Specifically, the temperature measured by the first temperature sensor 8 should reach the predetermined test range. In addition, since the third temperature sensor 10 or the fourth temperature sensor 11 is provided at the inlet of the valve under test and the second temperature sensor 9 is provided at the outlet of the valve under test, the temperature value measured by the third temperature sensor 10 or the fourth temperature sensor 11 should be greater than the temperature value measured by the second temperature sensor 9.

[0042] After the test is completed, first close the tubular heater 2 or the plasma torch 5, and then observe the temperature of the second temperature sensor 9. If the temperature of the second temperature sensor 9 drops below 60 °C, first close the manual valve of the inert gas generator 1 to close the gas source, and then close components such as the chiller 13, the solenoid valve and the pressure reducing valve.

[0043] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A device for testing the thermal insulation performance of a high-temperature resistant valve coating, wherein the valve to be tested is an ultra-high temperature resistant valve, and the surface of the inner cavity of the valve to be tested is coated with a high-temperature thermal insulation coating, characterized in that: The testing device comprises: An inert gas generator, used for outputting inert gas; A heating passage, used to heat the inert gas to a preset level of temperature, respectively, and the heated inert gas passes through the internal cavity of the high temperature resistant valve; A first temperature sensor, used to be arranged on the valve body of the valve to be tested; A second temperature sensor is used to be arranged at the outlet of the valve to be tested; At least one other temperature sensor is used to be arranged at the inlet of the valve to be tested.

2. The testing device according to claim 1, characterized in that: The heating path includes a plurality of heating paths arranged in parallel, and the plurality of heating paths include: A first heating branch, comprising a tubular heater, for heating the inert gas to a temperature not less than 800° C.; The second heating branch includes a plasma torch and is used to heat the inert gas to a temperature not lower than 2000°C.

3. The testing device according to claim 2, characterized in that: The first heating branch further comprises: A first solenoid valve and a first pressure reducing valve are sequentially connected in series between the inert gas generator and the tubular heater.

4. The testing device according to claim 2, characterized in that: The second heating branch further comprises: A second solenoid valve and a second pressure reducing valve are sequentially arranged in series between the inert gas generator and the plasma torch.

5. The testing device according to claim 2, characterized in that: Also includes: A heat exchanger, the heat exchanger comprising a first inlet, a first outlet, a second inlet, and a second outlet; The first inlet of the heat exchanger is used to be connected to the outlet of the valve to be tested, and the first outlet of the heat exchanger is used to discharge the cooled inert gas.

6. The testing device according to claim 5, characterized in that: Also includes: A water chiller, the water chiller comprising a first inlet, a second inlet, a first outlet and a second outlet; The first inlet and the first outlet of the chiller are used to be connected to the heat exchanger respectively; The second inlet and the second outlet of the chiller are used to be connected to the plasma torch respectively.

7. The testing device according to claim 6, characterized in that: A third solenoid valve is provided between the first outlet of the chiller and the second inlet of the heat exchanger; A fourth solenoid valve is provided between the first inlet of the chiller and the second outlet of the heat exchanger.

8. The testing device according to claim 6, characterized in that: The plasma torch comprises a first inlet, a first outlet, a second inlet and a second outlet; A fifth solenoid valve is provided between the second outlet of the chiller and the second inlet of the plasma torch; A sixth solenoid valve is disposed between the second inlet of the chiller and the second outlet of the plasma torch.

9. The testing device according to claim 8, characterized in that: Also includes: A first pressure sensor, configured to be disposed at an outlet of the tubular heater; A second pressure sensor is used to be arranged at the first outlet of the plasma torch.

10. The thermal insulation performance testing device according to claim 9, characterized in that: Also includes: The fixed platform is used to fix the valve to be tested.

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