Standard flame calibration device and calibration method thereof

Abstract

The invention discloses a standard flame calibration device and a calibration method thereof. The standard flame calibration device comprises a three-way valve, a standard heat insulation flame furnace used for providing standard gas, a mass spectrometer and a control module, a first valve port of the three-way valve is used for being connected into a combustion chamber, a second valve port of the three-way valve is connected into the standard heat insulation flame furnace, and a third valve port of the three-way valve is connected into the mass spectrometer; the control module is electrically connected with the three-way valve and used for controlling on-off of the first valve port, the second valve port and the third valve port in the three-way valve. Compared with the prior art, the mass spectrometer can be calibrated.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine combustion chamber performance testing, and in particular to a standard flame calibration device and a calibration method thereof. Background Art

[0002] The International Civil Aviation Organization (ICAO) is a United Nations specialized agency dedicated to formulating the principles and technologies of international navigation, promoting the planning and development of international air transport, and ensuring the safe and orderly development of international civil aviation. It provides international standards and recommended measures to ensure aviation safety. According to ICAO's specifications, the gas analyzer needs to be zero-calibrated and range-calibrated before the gas analysis test. Now a calibration device is urgently needed to meet the specifications. Summary of the invention

[0003] The object of the present invention is to provide a standard flame calibration device and a calibration method thereof, so that a mass spectrometer can be calibrated.

[0004] To solve the above technical problems, an embodiment of the present invention provides a standard flame calibration device, including: a three-way valve, a standard adiabatic flame furnace for providing standard gas, a mass spectrometer, and a control module, wherein the first valve port of the three-way valve is used to connect to a combustion chamber, the second valve port of the three-way valve is connected to the standard adiabatic flame furnace, and the third valve port of the three-way valve is connected to the mass spectrometer; the control module is electrically connected to the three-way valve, and is used to control the on and off of the first valve port, the second valve port and the third valve port in the three-way valve.

[0005] In one embodiment, the three-way valve has a first passage and a second passage. When the three-way valve is located in the first passage, the control module controls the first valve port to be connected to the third valve port; when the three-way valve is located in the second passage, the control module controls the second valve port to be connected to the third valve port.

[0006] The control module is used to control the three-way valve to be located in the first passage, allowing the calibration gas in the standard adiabatic flame furnace to enter the mass spectrometer to calibrate the mass spectrometer, and is also used to control the three-way valve to switch to the second passage after the mass spectrometer is calibrated, allowing the sample gas obtained from the combustion chamber to enter the mass spectrometer.

[0007] In one embodiment, the control module controls the three-way valve to switch to the second passage within a preset time period.

[0008] In one embodiment, the standard adiabatic flame furnace is a rotationally symmetric furnace.

[0009] In one embodiment, the side of the standard adiabatic flame furnace has a first inlet, a second inlet and a third inlet;

[0010] The first inlet is used to input fuel, the second inlet is used to input oxidant, and the third inlet is used to introduce accompanying air flow.

[0011] In one embodiment, the standard adiabatic flame furnace has a plurality of first pipes, a plurality of second pipes, and a third pipe; the first pipe is attached to the second pipe, and the first pipe, the second pipe, and the third pipe are not connected;

[0012] The first pipe has the first inlet and a first outlet disposed at the top; the second pipe has the second inlet and a second outlet disposed at the top; and the third pipe has the third inlet and a third outlet disposed at the top.

[0013] In one embodiment, the cross section of the standard adiabatic flame furnace is honeycomb-shaped;

[0014] The first pipe is a cylindrical pipe, the second pipe is a polygonal pipe, and the first pipe is inscribed in a region surrounded by a plurality of the second pipes.

[0015] In one embodiment, the third outlet surrounds the outer circumference of the first outlet and the second outlet.

[0016] An embodiment of the present invention provides a calibration method for a standard flame calibration device, which is used for the standard flame calibration device as described in any one of the above, and comprises the following steps:

[0017] Controlling the three-way valve to allow the standard adiabatic flame furnace to form a passage with the mass spectrometer, so that the calibration gas in the standard adiabatic flame furnace enters the mass spectrometer;

[0018] The mass spectrometer detects the calibration gas composition, and obtains the combustion temperature of the standard adiabatic flame furnace according to the calibration gas composition;

[0019] The mass spectrometer is calibrated by comparing the obtained combustion temperature of the standard adiabatic flame furnace with the actual combustion temperature of the standard adiabatic flame furnace;

[0020] The three-way valve is controlled to disconnect the standard adiabatic flame furnace from the mass spectrometer, so that a passage is formed between the combustion chamber and the mass spectrometer, and the sample gas in the combustion chamber enters the calibrated mass spectrometer, and the components of the sample gas are obtained through the mass spectrometer;

[0021] The standard flame calibration device is controlled to repeat the above steps within a preset time period.

[0022] In one embodiment, the preset time period is within 1 hour.

[0023] Compared with the prior art, the embodiment of the present invention controls the three-way valve through the control module to connect the standard adiabatic flame furnace with the mass spectrometer. The standard adiabatic flame furnace produces a calibration gas with a known combustion temperature. The mass spectrometer analyzes the components of the calibration gas, calculates the combustion temperature according to the components, and compares the calculated combustion temperature with the actual combustion temperature known from the standard adiabatic flame furnace, so as to know the accuracy of the mass spectrometer, perform zero point calibration and range calibration on the mass spectrometer, and then the control module controls the three-way valve to allow the sample gas in the gas chamber to enter the mass spectrometer for detection to meet the specification requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 is a schematic diagram of a connection module of a standard flame calibration device according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a standard adiabatic flame furnace according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the partial layout of the first pipeline and the second pipeline at the top of the standard adiabatic flame furnace according to one embodiment of the present invention;

[0028] Figure numerals: 1. Standard adiabatic flame furnace; 11. First inlet; 12. Second inlet; 13. Third inlet; 14. First pipeline; 15. Second pipeline; 16. Third pipeline; 18. Second outlet; 19. Third outlet; 2. Combustion chamber; 3. Three-way valve; 31. First valve port; 32. Second valve port; 33. Third valve port; 4. Mass spectrometer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0030] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0031] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0032] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0033] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0034] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0035] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0036] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0037] The first embodiment of the present invention provides a standard flame calibration device. Figure 1As shown, the standard flame calibration device includes: a three-way valve 3, a standard adiabatic flame furnace 1 for providing standard gas, a mass spectrometer 4, and a control module, wherein the first valve port 31 of the three-way valve 3 is used to connect to the combustion chamber 2, the second valve port 32 of the three-way valve 3 is connected to the standard adiabatic flame furnace 1, and the third valve port 33 of the three-way valve 3 is connected to the mass spectrometer 4. The combustion chamber 2 is sampled by a sampling rake and then connected to the three-way valve 3 through a pipeline. The control module is electrically connected to the three-way valve 3, and is used to control the opening and closing of the first valve port 31, the second valve port 32, and the third valve port 33 in the three-way valve 3.

[0038] The control module controls the three-way valve 3 to connect the standard adiabatic flame furnace 1 with the mass spectrometer 4. The standard adiabatic flame furnace 1 produces a calibration gas with a known combustion temperature. The mass spectrometer 4 analyzes the components of the calibration gas, calculates the combustion temperature based on the components, and compares the calculated combustion temperature with the actual combustion temperature known from the standard adiabatic flame furnace 1, so that the accuracy of the mass spectrometer 4 can be known. The mass spectrometer 4 is calibrated at zero point and range, and then the control module controls the three-way valve 3 to allow the sample gas in the gas chamber to enter the mass spectrometer 4 for detection to meet the specification requirements.

[0039] Furthermore, if Figure 1 As shown, the three-way valve 3 has a first passage and a second passage. When the three-way valve 3 is located in the first passage, the control module controls the first valve port 31 to be connected with the third valve port 33; when the three-way valve 3 is located in the second passage, the control module controls the second valve port 32 to be connected with the third valve port 33. The control module is used to control the three-way valve 3 to be located in the first passage, so that the calibration gas in the standard adiabatic flame furnace 1 enters the mass spectrometer 4 to calibrate the mass spectrometer 4, and is also used to control the three-way valve 3 to switch to the second passage after the mass spectrometer 4 is calibrated, so that the sample gas obtained from the combustion chamber 2 enters the mass spectrometer 4.

[0040] Further, the control module controls the three-way valve 3 to switch to the second passage within a preset time. The preset time may be no more than 1 hour, so as to meet the requirement of rechecking the zero point and range of the mass spectrometer 4 at intervals of no more than 1 hour during the test, which meets the requirements of ICAO specifications. If the change at any point exceeds ±2% of the full scale of the range taken, the mass spectrometer 4 should be restored to its specifications and the test should be repeated. In addition, the ICAO specification also requires that the gas analyzer should be periodically (once a month) checked for linearity, synergy, etc.

[0041] Furthermore, if Figure 2 As shown, the standard adiabatic flame furnace 1 is a rotationally symmetrical furnace.

[0042] Furthermore, if Figure 2As shown, the side of the standard adiabatic flame furnace 1 has a first inlet 11, a second inlet 12 and a third inlet 13. The first inlet 11 is used to input fuel, the second inlet 12 is used to input oxidant, and the third inlet 13 is used to pass the accompanying gas flow, which is an inert gas.

[0043] Specifically, Figure 2 and Figure 3 As shown, the standard adiabatic flame furnace 1 has a plurality of first pipes 14, a plurality of second pipes 15, and a third pipe 16; the first pipe 14 is attached to the second pipe 15, and the first pipe 14, the second pipe 15 and the third pipe 16 are not connected. The first pipe 14 has a first inlet 11 and a first outlet arranged at the top, the second pipe 15 has a second inlet 12 and a second outlet 18 arranged at the top, and the third pipe 16 has a third inlet 13 and a third outlet 19 arranged at the top.

[0044] In addition, preferably, the cross section of the standard adiabatic flame furnace 1 is honeycomb-shaped. The first pipe 14 is a cylindrical pipe, and the second pipe 15 is a polygonal pipe. The first pipe 14 is inscribed in the area formed by the second pipe 15. Figure 3 The schematic diagram of the layout of part of the first pipeline 14 and the second pipeline 15 is shown, and the first pipeline 14 and the second pipeline 15 are both cylindrical.

[0045] Furthermore, if Figure 3 As shown, the third outlet 19 surrounds the outer circumference of the first outlet 18 and the second outlet 18 .

[0046] The side of the standard adiabatic flame furnace 1 has a first inlet 11, a second inlet 12 and a third inlet 13 for inputting fuel, oxidant and accompanying airflow, wherein the accompanying airflow isolates the flame from the surrounding air, thereby approximating the effect of insulation. The top is composed of fine honeycomb pipes, each small unit is shown in the figure. In the diffusion combustion mode, the oxidant and fuel enter from different inlets and are ejected from the corresponding pipes at the top. At a certain flame height of the standard adiabatic flame furnace 1, the flame temperature is approximately the theoretical adiabatic flame temperature and can remain constant over a long time scale. At the same time, by adjusting the fuel / air equivalence ratio, the laminar flame temperature and gas component concentration can be accurately controlled, and it is close to the adiabatic theoretical calculation results, so it can be well used for calibration research in high temperature areas.

[0047] Both calibration and inspection require the introduction of standard gases of various concentrations into the mass spectrometer 4. In this embodiment, the three-way valve 3 is used to integrate the transmission of calibration gas and sample gas. The standard flame calibration device is divided into two modes by the gas inlet and outlet mode of the three-way valve 3: Mode 1 blocks the sample gas obtained from the combustion chamber 2, allowing the calibration gas in the standard adiabatic flame furnace 1 to enter the mass spectrometer 4 and perform zero point and range calibration or re-inspection; Mode 2 blocks the calibration gas, allowing the sample gas in the combustion chamber 2 to pass and perform component detection. The control module controls the flow of gas in the three-way valve 3 to ensure that the standard flame calibration device switches to mode 1 before the start and end of the test and at intervals of no more than 1 hour during the process to calibrate or re-inspect the mass spectrometer 4.

[0048] The second embodiment of the present invention provides a calibration method for a standard flame calibration device, which is used for the standard flame calibration device in the first embodiment. Figure 1 As shown, the following steps are included:

[0049] The three-way valve 3 is controlled to form a passage between the standard adiabatic flame furnace 1 and the mass spectrometer 4, and the calibration gas in the standard adiabatic flame furnace 1 enters the mass spectrometer 4;

[0050] The mass spectrometer 4 detects the calibration gas composition, and obtains the combustion temperature of the standard adiabatic flame furnace 1 according to the calibration gas composition;

[0051] The mass spectrometer 4 is calibrated according to the comparison between the acquired combustion temperature of the standard adiabatic flame furnace 1 and the actual combustion temperature of the standard adiabatic flame furnace 1;

[0052] The three-way valve 3 is controlled to disconnect the standard adiabatic flame furnace 1 from the mass spectrometer 4, so that a passage is formed between the combustion chamber 2 and the mass spectrometer 4, and the sample gas in the combustion chamber 2 enters the calibrated mass spectrometer 4, and the components of the sample gas are obtained through the mass spectrometer 4;

[0053] The standard flame calibration device is controlled to repeat the above steps within a preset time period.

[0054] In one embodiment, the preset time period is within 1 hour.

[0055] It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0056] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0057] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0058] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A standard flame calibration device, characterized in that: include: A three-way valve, a standard adiabatic flame furnace for providing standard gas, a mass spectrometer, and a control module, wherein the first valve port of the three-way valve is used to connect to a combustion chamber, the second valve port of the three-way valve is connected to the standard adiabatic flame furnace, and the third valve port of the three-way valve is connected to the mass spectrometer; the control module is electrically connected to the three-way valve, and is used to control the opening and closing of the first valve port, the second valve port, and the third valve port in the three-way valve.

2. The standard flame calibration device according to claim 1, characterized in that: The three-way valve has a first passage and a second passage. When the three-way valve is located in the first passage, the control module controls the first valve port to be connected to the third valve port; when the three-way valve is located in the second passage, the control module controls the second valve port to be connected to the third valve port; The control module is used to control the three-way valve to be located in the first passage, allowing the calibration gas in the standard adiabatic flame furnace to enter the mass spectrometer to calibrate the mass spectrometer, and is also used to control the three-way valve to switch to the second passage after the mass spectrometer is calibrated, allowing the sample gas obtained from the combustion chamber to enter the mass spectrometer.

3. The standard flame calibration device according to claim 2, characterized in that: The control module controls the three-way valve to switch to the second passage within a preset time period.

4. The standard flame calibration device according to claim 1, characterized in that: The standard adiabatic flame furnace is a rotationally symmetrical furnace.

5. The standard flame calibration device according to claim 4, characterized in that: The side of the standard adiabatic flame furnace has a first inlet, a second inlet and a third inlet; The first inlet is used to input fuel, the second inlet is used to input oxidant, and the third inlet is used to introduce accompanying air flow.

6. The standard flame calibration device according to claim 5, characterized in that: The standard adiabatic flame furnace has a plurality of first pipes, a plurality of second pipes, and a third pipe; the first pipe is attached to the second pipe, and the first pipe, the second pipe, and the third pipe are not connected; The first pipe has the first inlet and a first outlet disposed at the top; the second pipe has the second inlet and a second outlet disposed at the top; and the third pipe has the third inlet and a third outlet disposed at the top.

7. The standard flame calibration device according to claim 6, characterized in that: The cross section of the standard adiabatic flame furnace is honeycomb-shaped; The first pipe is a cylindrical pipe, the second pipe is a polygonal pipe, and the first pipe is inscribed in a region surrounded by a plurality of the second pipes.

8. The standard flame calibration device according to claim 6, characterized in that: The third outlet surrounds the outer circumference of the first outlet and the second outlet.

9. A calibration method for a standard flame calibration device, characterized in that: The standard flame calibration device according to any one of claims 1 to 8 comprises the following steps: Controlling the three-way valve to allow the standard adiabatic flame furnace to form a passage with the mass spectrometer, so that the calibration gas in the standard adiabatic flame furnace enters the mass spectrometer; The mass spectrometer detects the calibration gas composition, and obtains the combustion temperature of the standard adiabatic flame furnace according to the calibration gas composition; The mass spectrometer is calibrated by comparing the obtained combustion temperature of the standard adiabatic flame furnace with the actual combustion temperature of the standard adiabatic flame furnace; The three-way valve is controlled to disconnect the standard adiabatic flame furnace from the mass spectrometer, so that a passage is formed between the combustion chamber and the mass spectrometer, and the sample gas in the combustion chamber enters the calibrated mass spectrometer, and the components of the sample gas are obtained through the mass spectrometer; The standard flame calibration device is controlled to repeat the above steps within a preset time period.

10. The calibration method of the standard flame calibration device according to claim 9, characterized in that: The preset time length is within 1 hour.

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