Gas Analysis Test Device and Method

Abstract

The present invention discloses a gas analysis test device and method, which relates to the field of aeroengines and is used to conveniently conduct pollutant emission tests and temperature measurement tests on gas. The gas analysis test device includes a mixer, a heat preservation pipe assembly, a gas component analysis cabinet, and a smoke analysis cabinet. The mixer has a plurality of inlets and at least one outlet. The heat preservation pipe assembly is located upstream of the mixer, and the heat preservation pipe assembly is in fluid communication with the inlet of the mixer through a first branch. The heat preservation pipe assembly is also in fluid communication with the gas component analysis cabinet through a second branch, and the outlet of the mixer is also in fluid communication with the gas component analysis cabinet through a third branch. The heat preservation pipe assembly is also in fluid communication with the smoke analysis cabinet through a fourth branch; the outlet of the mixer is also in fluid communication with the smoke analysis cabinet through a fifth branch. The first branch, the second branch, the fourth branch, the third branch, and the fifth branch are all configured to be switchable between a conducting state and a cut-off state.

Description

Technical Field

[0001] The present invention relates to the field of aero-engines, and particularly to a gas analysis test device and method. Background Art

[0002] The gas emitted by an aero-engine needs to be subjected to two tests. One is the pollution emission test, and the other is the gas analysis method for temperature measurement test.

[0003] When an aero-engine is taking airworthiness certification, a pollution emission test needs to be carried out to verify whether its pollution emission performance meets the requirements of the International Civil Aviation Organization (ICAO) regulations. The ICAO regulations require that the sampling positions shall not be less than 12, and representative sample gas shall be provided. Usually, multiple fixed sampling rakes are arranged on the whole engine and the sector combustion chamber to measure the pollution emission to meet the requirement of the representativeness of the sample gas required by ICAO.

[0004] With the development of aero-engines towards higher thrust-to-weight ratios, the exhaust gas temperature of the combustion chamber is getting higher and higher. At present, the average temperature at the outlet of the combustion chamber of aero-engines with a thrust-to-weight ratio of 12 - 15 has reached above 1900K, and the hot spot temperature is as high as above 2300K, which has exceeded the temperature measurement range of the B-type thermocouple. The thermocouple that can measure higher temperatures has the problem of short life in a high-temperature oxidation environment. Therefore, the gas analysis temperature measurement method that can be used in the combustion environment and can measure the gas temperature of 2300K and even higher has gradually become a mainstream temperature measurement method. In the related art, an independent sampling rake is used to carry out the gas analysis method for temperature measurement test.

[0005] The inventor found that there are at least the following problems in the prior art: The gas emitted by an aero-engine or a combustion chamber needs to be subjected to the above two tests, namely the pollution emission test and the gas analysis method for temperature measurement test. In the related art, these two tests are carried out separately, and the test efficiency is relatively low; moreover, separate test equipment needs to be set up for each test, and the test cost is very high. Summary of the Invention

[0006] The present invention provides a gas analysis test device and method to conveniently carry out the pollution emission test and temperature measurement test of gas.

[0007] An embodiment of the present invention provides a gas analysis test device, which is characterized by including:

[0008] A mixer having a plurality of inlets and at least one outlet;

[0009] An insulating pipe assembly located upstream of the mixer, and the insulating pipe assembly is in fluid communication with the inlet of the mixer through a first branch;

[0010] A gas component analysis cabinet, the heat preservation pipe assembly is also in fluid communication with the gas component analysis cabinet through a second branch, and the outlet of the mixer is also in fluid communication with the gas component analysis cabinet through a third branch; and

[0011] A smoke analysis cabinet, the heat preservation pipe assembly is also in fluid communication with the smoke analysis cabinet through a fourth branch; the outlet of the mixer is also in fluid communication with the smoke analysis cabinet through a fifth branch;

[0012] The first branch, the second branch, the fourth branch, the third branch and the fifth branch are all configured to be switchable between a conducting state and a cut-off state.

[0013] In some embodiments, the gas analysis test device further includes:

[0014] A first switching component, installed in the first branch to switch the conducting and cut-off states of the first branch.

[0015] In some embodiments, the first switching component includes a first switching valve.

[0016] In some embodiments, the gas analysis test device further includes:

[0017] A second switching component, installed in the second branch to switch the conducting and cut-off states of the second branch.

[0018] In some embodiments, the second switching component includes:

[0019] A second switching valve, installed in the second branch to switch the conducting and cut-off states of the second branch;

[0020] A first filter, installed in the second branch and located downstream of the second switching valve to filter impurities in the second branch; and

[0021] A first pressure reducing valve, installed in the second branch and located downstream of the first filter to regulate the gas pressure in the second branch.

[0022] In some embodiments, the gas analysis test device further includes:

[0023] A third switching component, installed in the third branch to switch the conducting and cut-off states of the third branch.

[0024] In some embodiments, the third switching component includes:

[0025] A third switching valve, installed in the third branch;

[0026] A second filter, located downstream of the third switching valve; and

[0027] A second pressure reducing valve is installed in the third branch and downstream of the second filter to regulate the gas pressure in the third branch.

[0028] In some embodiments, the gas analysis test device further includes:

[0029] A fourth switching component is installed in the fourth branch to switch the on and off states of the fourth branch.

[0030] In some embodiments, the fourth switching component includes the fourth switching valve.

[0031] In some embodiments, the gas analysis test device further includes:

[0032] A fifth switching component is installed in the fifth branch to switch the on and off states of the fifth branch.

[0033] In some embodiments, the fifth switching component includes the fifth switching valve.

[0034] In some embodiments, the gas analysis test device further includes:

[0035] A chassis, the mixer is located inside the chassis; and

[0036] A temperature regulation component is also installed inside the chassis.

[0037] In some embodiments, the gas analysis test device further includes:

[0038] A temperature control system is installed upstream of the gas component analysis cabinet to regulate the gas temperature entering the inside of the gas component analysis cabinet.

[0039] In some embodiments, the heat preservation pipe assembly includes a plurality of heat preservation pipes arranged in parallel.

[0040] In some embodiments, at least one of the heat preservation pipes is communicated with the smoke analysis cabinet through the fourth branch.

[0041] An embodiment of the present invention also provides a gas analysis test method, including the following steps:

[0042] Sampling the gas discharged from the aeroengine or combustion chamber to obtain a sample gas;

[0043] Introducing the sample gas into the heat preservation pipe assembly of the gas analysis test device provided by any technical solution of the present invention;

[0044] According to the test requirements, control the on and off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to introduce the sample gas into the gas composition analysis cabinet or the smoke analysis cabinet for analysis.

[0045] In some embodiments, the step of controlling the on and off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch according to the test requirements to introduce the sample gas into the gas composition analysis cabinet or the smoke analysis cabinet for analysis specifically includes:

[0046] For the whole machine or the sector combustion chamber, turn on the first branch, the third branch, and the fifth branch; turn off the second branch and the fourth branch;

[0047] Introduce the sample gas into at least two heat preservation pipes of the heat preservation pipe assembly;

[0048] Each of the heat preservation pipes transports the sample gas to the mixer for mixing;

[0049] The mixed sample gas enters the gas composition analysis cabinet through the third branch for pollution emission analysis.

[0050] In some embodiments, the gas analysis test method further includes the following steps:

[0051] The mixed sample gas enters the smoke analysis cabinet through the fifth branch for a smoke test.

[0052] In some embodiments, the step of controlling the on and off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch according to the test requirements to introduce the sample gas into the gas composition analysis cabinet or the smoke analysis cabinet for analysis specifically includes:

[0053] For the annular combustion chamber, if one or two independent sampling rakes are used, first conduct a pollution emission test and then a temperature measurement test; if one mixed sampling rake is used, conduct a pollution emission test.

[0054] In some embodiments, for the annular combustion chamber, if one or two independent sampling rakes are used, first conducting a pollution emission test and then a temperature measurement test specifically includes the following steps:

[0055] Switch the first branch and the third branch to the on state, and switch the second branch, the fourth branch, and the fifth branch to the off state;

[0056] Transport the sample gas in the independent sampling rake to the heat preservation pipe assembly;

[0057] The sample gas enters the mixer through the first branch for mixing;

[0058] The mixed sample gas enters the gas component analysis cabinet through the third branch;

[0059] The mixed sample gas enters the smoke analysis cabinet through the fifth branch;

[0060] Switch the first branch, the third branch, and the fifth branch to the cut-off state, and switch the second branch and the fourth branch to the conducting state;

[0061] The sample gas in the independent sampling rake is transported to the gas component analysis cabinet through the heat preservation pipe assembly and the second branch.

[0062] In some embodiments, if a hybrid sampling rake is used, a pollution emission test and a smoke test are performed, which specifically include the following steps:

[0063] Switch the first branch, the third branch, and the fifth branch to the cut-off state, and switch the second branch and the fourth branch to the conducting state;

[0064] The sample gas in the hybrid sampling rake is transported to the gas component analysis cabinet through the heat preservation pipe assembly and the second branch;

[0065] The sample gas in the hybrid sampling rake is transported to the smoke analysis cabinet through the heat preservation pipe assembly and the fourth branch.

[0066] The gas analysis test device provided by the above technical solution has a mixer, a heat preservation pipe assembly, a gas component analysis cabinet, and a smoke analysis cabinet. The sample gas input from the heat preservation pipe assembly can be selected to enter the mixer and then flow to at least one of the gas component analysis cabinet and the smoke analysis cabinet; it can also directly flow to at least one of the gas component analysis cabinet and the smoke analysis cabinet without passing through the mixer. It can be seen that the gas analysis test device has both a mixing function and a switching function, enabling the outlet sample gases of multiple sampling rakes to be mixed into one stream to meet the pollution emission test requirements of the whole machine and the sector combustion chamber; moreover, in the same test device, only the independent sampling rake can be used to carry out the pollution emission test and the gas analysis temperature measurement test, achieving the effect of meeting the test requirements while saving test time and test costs. This enables the gas analysis test device to be applicable to various occasions and various test requirements, and at the same time meet the requirements of the pollution emission test and the gas analysis method temperature measurement test. Description of the Drawings

[0067] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0068] Figure 1 is a schematic diagram of the principle of the gas analysis test device provided by the embodiment of the present invention;

[0069] Figure 2 is a schematic diagram of the process flow of the gas analysis test method provided by the embodiment of the present invention. Detailed implementation manners

[0070] The following will Figures 1 to 2 describe in more detail the technical solutions provided by the present invention.

[0071] The embodiment of the present invention provides a gas analysis test device for testing the gas emitted by an aeroengine. The gas tests include two categories: pollution emission test and temperature measurement test by gas analysis method.

[0072] Pollution emission test: Sample and analyze the components of the gas, and then obtain the combustion chamber pollutant emission index through calculation. In the pollution emission test, two devices, namely the gas component analysis cabinet 3 and the smoke analysis cabinet 4, are needed for measurement and analysis. The temperature measurement test by gas analysis method mainly uses the gas component analysis cabinet 3 for measurement and analysis. The gas for the pollution emission test should be the mixed gas flow collected from multiple positions of the test object. There are two ways to form the mixed gas flow: The first is to use the existing mixed sampling rake, and the gas output by the mixed sampling rake is directly the mixed gas flow, which can be directly transported to the gas component analysis cabinet 3 and the smoke analysis cabinet 4 without being mixed by the mixer 1. The second is to use an independent sampling rake, and then transport the multiple sample gases sampled by the independent sampling rake to the mixer 1 provided by the embodiment of the present invention for mixing, and then transport them to the gas component analysis cabinet 3 and the smoke analysis cabinet 4 for analysis.

[0073] Temperature measurement by gas analysis method: Sample and analyze the components of the gas, and then obtain the combustion temperature of the combustion chamber through calculation. When conducting the temperature measurement test by gas analysis method, each gas flow is analyzed and calculated separately, without being mixed by the mixer 1 or the mixed sampling rake.

[0074] The following will introduce in detail the gas analysis test device and test method provided by the embodiment of the present invention.

[0075] Refer to Figure 1 andFigure 2 , the gas analysis test device includes a mixer 1, a heat preservation pipe assembly 2, a gas component analysis cabinet 3, and a smoke analysis cabinet 4. The mixer 1 has multiple inlets and at least one outlet. The heat preservation pipe assembly 2 is located upstream of the mixer 1. The heat preservation pipe assembly 2 is in fluid communication with the inlet of the mixer 1 through a first branch. The heat preservation pipe assembly 2 is also in fluid communication with the gas component analysis cabinet 3 through a second branch. The outlet of the mixer 1 is also in fluid communication with the gas component analysis cabinet through a third branch. The heat preservation pipe assembly 2 is also in fluid communication with the smoke analysis cabinet 4 through a fourth branch; the outlet of the mixer 1 is also in fluid communication with the smoke analysis cabinet 4 through a fifth branch. The first branch, the second branch, the fourth branch, the third branch, and the fifth branch are all configured to be switchable between a conducting state and a cut-off state.

[0076] See Figure 1 and Figure 2 , the mixer 1 is used to mix multiple airflows. The mixer 1 includes a cavity, multiple inlets communicating with the cavity, and at least one outlet communicating with the cavity. In the embodiments of this article, an example is given with one outlet provided. The outlet airflow of the mixer 1 flows to the gas component analysis cabinet 3 and the smoke analysis cabinet 4.

[0077] The heat preservation pipe assembly 2 is used to receive the sample gas. A sampling rake is provided upstream of the heat preservation pipe assembly 2. The sampling rake is divided into two types, one is a mixed sampling rake and the other is an independent sampling rake. The mixed sampling rake conveys the mixed sample gas collected from multiple sampling points to the heat preservation pipe assembly 2. The independent sampling rake conveys the sample gas collected from one sampling point to the heat preservation pipe assembly 2. Both types of sampling rakes can be applied to the gas analysis test device provided by the embodiments of the present invention.

[0078] In some embodiments, the heat preservation pipe assembly 2 includes multiple heat preservation pipes arranged in parallel. The heat preservation pipes can be electrically traced heat preservation pipes, and heating and heat preservation are achieved by using electric energy. In some embodiments, at least one heat preservation pipe is in communication with the smoke analysis cabinet 4 through a fourth branch. In this article, an example is given where the heat preservation pipe 2a is in communication with the smoke analysis cabinet 4 through a fourth branch.

[0079] The independent sampling rake generally has five output ports, and the number of heat preservation pipes corresponds one-to-one with the number of output ports of the sampling rake. In the embodiments of the present invention, taking ten heat preservation pipes 2a - 2i as an example, these heat preservation pipes are divided into two groups, with five in each group, and each group corresponds to an independent sampling rake. One of the two groups of heat preservation pipes can be selected for use, or both groups can be used simultaneously. Of course, only one of the heat preservation pipes can also be selected for use to correspond to the mixed sampling rake. The conducting and cut-off states of each heat preservation pipe are controlled separately, and plugs can be set for each heat preservation pipe. When the plug is removed, the heat preservation pipe is connected. When the plug is connected, the heat preservation pipe is cut off.

[0080] See Figure 1 and Figure 2, The function of the gas component analysis cabinet 3 is to adjust the temperature, pressure, flow rate, etc. of the sample gas, and then measure the volume concentration of the gas components. It mainly includes pipelines, valves, filters, air extraction pumps, condensate removal devices, pressure / temperature / flow rate measuring instruments, and gas component analyzers. These components are all integrated in a cabinet. There are five gas component analysis cabinets 3, namely gas component analysis cabinets 3a to 3e, corresponding to the five output ports of an independent sampling rake.

[0081] The function of the smoke analysis cabinet 4 is to adjust the temperature, pressure, and flow rate of the sample gas, and then measure the smoke number. It mainly includes pipelines, valves, filters, filter paper clips, air extraction pumps, pressure / temperature / flow rate / volume measuring instruments. These components are also integrated in a cabinet.

[0082] In some embodiments, the gas analysis test device further includes a first switching component 5, and the first switching component 5 is installed on the first branch to switch the on and off states of the first branch. In some embodiments, the first switching component 5 includes a first switching valve.

[0083] In some embodiments, the gas analysis test device further includes a second switching component 6, and the second switching component 6 is installed on the second branch to switch the on and off states of the second branch.

[0084] See Figure 1 and Figure 2 , In some embodiments, the second switching component 6 includes a second switching valve 61, a first filter 62, and a first pressure reducing valve 63. The second switching valve 61 is installed on the second branch to switch the on and off states of the second branch. The first filter 62 is installed on the second branch and is located downstream of the second switching valve 61 to filter impurities in the sample gas in the second branch. The first pressure reducing valve 63 is installed on the second branch and is located downstream of the first filter 62 to adjust the gas pressure in the second branch. The second switching valve 61, the first filter 62, and the first pressure reducing valve 63 can all adopt existing products.

[0085] There are 10 groups of the second switching components 6, and each group includes a second switching valve 61, a first filter 62, and a first pressure reducing valve 63. Each group corresponds to a heat preservation pipe. The second switching valves 61a to 61i correspond to the heat preservation pipes 2a to 2i. Similarly, the first filters 62a to 62i and the first pressure reducing valves 63a to 63i also correspond to the heat preservation pipes 2a to 2i one by one.

[0086] In some embodiments, the gas analysis test device further includes a third switching component 7, and the third switching component 7 is installed on the third branch to switch the on and off states of the third branch.

[0087] In some embodiments, the third switching component 7 includes a third switching valve 71, a second filter 72, and a second pressure reducing valve 73. The third switching valve 71 is installed in the third branch. The second filter 72 is located downstream of the third switching valve 71. The second pressure reducing valve 73 is installed in the third branch and is located downstream of the second filter 72 to regulate the gas pressure in the third branch.

[0088] With the above arrangement, on the one hand, the pipeline connection of the system is simplified, and on the other hand, a rich branch switching function is achieved with fewer components to meet the requirements of two tests, namely the pollution emission test and the gas analysis method temperature measurement test.

[0089] Continuing to refer to Figure 1 , in some embodiments, the gas analysis test device further includes a fourth switching component 8. The fourth switching component 8 is installed in the fourth branch to switch the on-off state of the fourth branch. In some embodiments, the fourth switching component 8 includes a fourth switching valve.

[0090] Continuing to refer to Figure 1 , in some embodiments, the gas analysis test device further includes a fifth switching component 9. The fifth switching component 9 is installed in the fifth branch to switch the on-off state of the fifth branch. In some embodiments, the fifth switching component 9 includes a fifth switching valve.

[0091] Continuing to refer to Figure 1 , in some embodiments, the gas analysis test device further includes a chassis 10 and a temperature regulation component 11. The mixer 1 is located inside the chassis 10. The temperature regulation component 11 is also installed inside the chassis 10, specifically at the bottom of the inner cavity of the chassis 10. The temperature regulation component 11 can specifically adopt an electric heater to keep the temperature inside the chassis 10 at 160 °C to meet the temperature requirements of the ICAO specification for the pipeline. The chassis 10 plays a protective role, and the first switching component 5, the second switching component 6, the third switching component 7, the fourth switching component 8, and the fifth switching component 9 introduced above can all be arranged inside the chassis 10.

[0092] In some embodiments, the gas analysis test device further includes a temperature control system 12. The temperature control system 12 is installed upstream of the gas component analysis cabinet 3 to regulate the gas temperature entering the inside of the gas component analysis cabinet 3. The temperature control system is used to regulate and control the temperature of the sample gas so that the sample gas meets the test requirements.

[0093] Continuing to refer to Figure 1 , in some embodiments, the gas analysis test device further includes an instrument gas pipeline 13. A switching valve 14 is installed in the instrument gas pipeline 13. The switching valve 14 is used to control the on-off of the instrument gas and is used to backflush the sampling pipeline before successful ignition and after the test ends to avoid contamination of the sampling pipeline by impurities such as fuel.

[0094] See Figure 2 , the embodiment of the present invention also provides a gas analysis test method, including the following steps:

[0095] Step S100: Sample the gas discharged from the aeroengine or combustion chamber to obtain a sample gas.

[0096] Step S200: Pass the sample gas into the heat preservation tube assembly 2 of the gas analysis test device provided by any technical solution of the present invention.

[0097] Step S300: According to the test requirements, control the on-off states of the first branch, second branch, third branch, fourth branch, and fifth branch to pass the sample gas into the gas component analysis cabinet 3 or the smoke analysis cabinet 4 for analysis.

[0098] There are two sources of the gas to be tested: First, the whole machine or the sector combustion chamber; Second, the annular combustion chamber. According to the different gas sources, the test is divided into two working conditions introduced below.

[0099] The first working condition is that the gas comes from the whole machine or the sector combustion chamber.

[0100] Under this working condition, a pollution emission test can be carried out. The pollution emission test includes two sub-tests: gas component analysis and smoke analysis.

[0101] (1) Test steps for gas component analysis.

[0102] First, for the whole machine or the sector combustion chamber, turn on the first branch, third branch, and fifth branch; turn off the second branch and fourth branch;

[0103] Second, pass the sample gas into at least two heat preservation tubes of the heat preservation tube assembly 2;

[0104] Third, each heat preservation tube transports the sample gas to the mixer 1 for mixing;

[0105] Finally, the mixed sample gas enters the gas component analysis cabinet 3 through the third branch for pollution emission analysis.

[0106] (2) Test steps for smoke analysis.

[0107] In the test steps of the above gas component analysis, the mixed sample gas is also directed to the smoke analysis cabinet 4, and then the smoke analysis can be carried out. The specific steps are: The mixed sample gas enters the smoke analysis cabinet 4 through the fifth branch for a smoke test.

[0108] The working principle of the first working condition is introduced below.

[0109] When conducting pollution emission tests using multiple hybrid sampling rakes in the whole machine and the sector combustion chamber, first, the sample gas at the outlet of the sampling rake enters the mixer through a part of the pipelines in the heat preservation pipes 2a - 2j. Suppose there are 4 hybrid sampling rakes, then only four of the heat preservation pipes 2a - 2j need to be connected, and four of the corresponding first switching components 5a - 5j need to be opened; at the same time, the inlet ends of the remaining unused heat preservation pipes are blocked with plugs, and the first switching components corresponding to these inapplicable heat preservation pipes are all closed to disconnect the corresponding first branches. Then, the sample gas at the outlet of the mixer 1 passes through the third switching valve 71, the second filter 72, and the second pressure reducing valve 73 and enters the gas component analysis cabinet 3a for measuring gaseous pollutants. It should be noted that this is only part of the embodiments. The mixed sample gas that also passes through the third switching valve 71, the second filter 72, and the second pressure reducing valve 73 can be led to any one of the gas component analysis cabinets 3a - 3e for analysis. Of course, corresponding connecting pipelines need to be set up. In addition, the sample gas at the outlet of the mixer 1 passes through the fifth switching component 9 and enters the smoke analysis cabinet 4 for measuring smoke.

[0110] The second working condition is that the fuel gas comes from the annular combustion chamber.

[0111] Under this working condition, according to the different structural forms of the sampling rakes, it can be subdivided into two categories: tests for independent sampling rakes and tests for hybrid sampling rakes.

[0112] The first category: If one or two independent sampling rakes are used. First, conduct a pollution emission test, and then conduct a temperature measurement test using the fuel gas analysis method. The pollution emission test includes two major parts: a gas component analysis test and a smoke test.

[0113] The pollution emission test includes the following steps:

[0114] First, switch the first branch and the third branch to the conducting state, and switch the second branch, the fourth branch, and the fifth branch to the cut-off state.

[0115] Second, transport the sample gas in the independent sampling rake to the heat preservation pipe assembly 2.

[0116] Third, the sample gas enters the mixer 1 through the first branch for mixing.

[0117] Fourth, the mixed sample gas enters the gas component analysis cabinet 3 through the third branch.

[0118] Fifth, the mixed sample gas enters the smoke analysis cabinet 4 through the fifth branch.

[0119] Sixth, switch the first branch, the third branch, and the fifth branch to the cut-off state, and switch the second branch and the fourth branch to the conducting state.

[0120] Seventhly, the sample gas in the independent sampling rake is transported through the heat preservation pipe assembly 2 and the second branch to the gas composition analysis cabinet 3.

[0121] In the above steps, the first to fifth steps are for completing the pollution emission test; the sixth and seventh steps are for completing the gas analysis temperature measurement test.

[0122] The following introduces the principles of carrying out the pollution emission test and the gas analysis temperature measurement test on the annular combustor using 1 or 2 independent sampling rakes.

[0123] When carrying out the pollution emission test and the outlet temperature distribution test on the annular combustor using 1 or 2 independent sampling rakes, the pollution emission test can be carried out first, and then the gas analysis temperature measurement test can be directly carried out without replacing the sampling rake.

[0124] When carrying out the pollution emission test, first, the sample gas at the outlet of the sampling rake enters the mixer 1 through any group in the heat preservation pipe assembly 2, such as the heat preservation pipes 2a - 2e, and the corresponding second switching valves 61a - 61e, the first filters 62a - 62e, and the first pressure reducing valves 63a - 63e for sample gas mixing. Then, the sample gas at the outlet of the mixer 1 passes through the third switching valve 71, the second filter 72, and the second pressure reducing valve 73 and enters the gas composition analysis cabinet 3a for measuring gaseous pollutants. The sample gas at the outlet of the mixer passes through the fifth switching component 9 and enters the smoke analysis cabinet 4 for measuring smoke.

[0125] When carrying out the gas analysis temperature measurement test, first, close the first switching components 5a - 5i. The sample gas at the outlet of the first sampling rake enters the gas composition analysis cabinets 3a - 3e respectively through one group of the heat preservation pipes 2a - 2e in the heat preservation pipe assembly 2, the second switching valves 61a - 61e, the first filters 62a - 62e, and the first pressure reducing valves 63a - 63e. The gaseous components of the 5 - point sample gas collected by the first sampling rake are measured for calculating the gas temperature. Then, close the second switching valves 61a - 61e. The sample gas at the outlet of the second sampling rake enters the gas composition analysis cabinets 3a - 3e respectively through another group of the heat preservation pipes 2f - 2i in the heat preservation pipe assembly 2, the second switching valves 61f - 61i, the first filters 62f - 62i, and the first pressure reducing valves 63f - 63i. The gaseous components of the 5 - point sample gas collected by the second sampling rake are measured for calculating the gas temperature.

[0126] The second category: If a hybrid sampling rake is used, then carry out the pollution emission test. The specific steps are as follows:

[0127] First, switch the first branch, the third branch, and the fifth branch to the cut - off state, and switch the second branch and the fourth branch to the conducting state.

[0128] Second, the sample gas in the hybrid sampling rake is transported to the gas composition analysis cabinet 3 through the heat preservation pipe assembly 2 and the second branch.

[0129] Third, the sample gas in the hybrid sampling rake is transported to the smoke analysis cabinet 4 through the heat preservation pipe assembly 2 and the fourth branch.

[0130] The principle of the pollution emission test using one hybrid sampling rake for the annular combustor is introduced below.

[0131] When using one hybrid sampling rake and cooperating with the rotary displacement mechanism to carry out the pollution emission test for the annular combustor, first, the sample gas at the outlet of the sampling rake enters the gas composition analysis cabinet 3a through one heat preservation pipe 2a of the heat preservation pipe assembly 2, the corresponding second switching valve 61a, the first filter 62a, and the first pressure reducing valve 63a for measuring gaseous pollutants. The sample gas at the outlet of the sampling rake also enters the smoke analysis cabinet 4 through the heat preservation pipe 2a and the fourth switching assembly 8 for measuring smoke.

[0132] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 thus cannot be understood as a limitation on the protection content of the present invention.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas analysis test device, characterized in that, Comprising: A mixer (1) having a plurality of inlets and at least one outlet; A heat preservation pipe assembly (2) located upstream of the mixer (1) for receiving a sample gas; The heat preservation pipe assembly (2) includes a plurality of heat preservation pipes arranged in parallel, and the heat preservation pipe assembly (2) is in fluid communication with the inlet of the mixer (1) through a first branch; A gas component analysis cabinet (3), the heat preservation pipe assembly (2) is also in fluid communication with the gas component analysis cabinet (3) through a second branch, and the outlet of the mixer (1) is also in fluid communication with the gas component analysis cabinet (3) through a third branch; and A smoke analysis cabinet (4), the heat preservation pipe assembly (2) is also in fluid communication with the smoke analysis cabinet (4) through a fourth branch; the outlet of the mixer (1) is also in fluid communication with the smoke analysis cabinet (4) through a fifth branch; The first branch, the second branch, the fourth branch, the third branch and the fifth branch are all configured to be switchable between a conducting state and a cutoff state.

2. The gas analysis test device according to claim 1, wherein, Further comprising: A first switching component (5) installed on the first branch to switch the conducting and cutoff states of the first branch.

3. The gas analysis test device according to claim 2, wherein The first switching component (5) includes a first switching valve.

4. The gas analysis test device according to claim 1, wherein Further comprising: A second switching component (6) installed on the second branch to switch the conducting and cutoff states of the second branch.

5. The gas analysis test device according to claim 4, characterized in that, The second switching component (6) includes: A second switching valve (61) installed on the second branch to switch the conducting and cutoff states of the second branch; A first filter (62) installed on the second branch and located downstream of the second switching valve (61) to filter impurities in the second branch; and A first pressure reducing valve (63) installed on the second branch and located downstream of the first filter (62) to regulate the gas pressure in the second branch.

6. The gas analysis test device according to claim 1, wherein Further comprising: A third switching component (7) installed on the third branch to switch the conducting and cutoff states of the third branch.

7. The gas analysis test device according to claim 6, wherein, The third switching component (7) includes: A third switching valve (71) installed on the third branch; A second filter (72) located downstream of the third switching valve (71); and A second pressure reducing valve (73) installed on the third branch and located downstream of the second filter (72) to regulate the gas pressure in the third branch.

8. The gas analysis test device according to claim 1, characterized in that, Further comprising: A fourth switching component (8) installed on the fourth branch to switch the conducting and cutoff states of the fourth branch.

9. The gas analysis test device according to claim 8, characterized in that The fourth switching component (8) includes a fourth switching valve.

10. The gas analysis test device according to claim 1, wherein, Further comprising: A fifth switching component (9) installed on the fifth branch to switch the conducting and cutoff states of the fifth branch.

11. The gas analysis test device according to claim 10, characterized in that, The fifth switching component (9) includes a fifth switching valve.

12. The gas analysis test device according to claim 1, wherein, Further comprising: A chassis (10), the mixer (1) is located inside the chassis (10); And A temperature regulating component (11) is also installed inside the chassis (10).

13. The gas analysis test device according to claim 1, characterized in that, Further comprising: A temperature control system (12) installed upstream of the gas component analysis cabinet (3) to regulate the gas temperature entering the gas component analysis cabinet (3).

14. The gas analysis test device according to claim 1, characterized in that, At least one heat preservation pipe of the heat preservation pipe assembly (2) communicates with the smoke analysis cabinet (4) through the fourth branch.

15. A method for gas analysis test, characterized in that, It includes the following steps: Sampling the gas discharged from an aeroengine or a combustion chamber to obtain a sample gas; Feeding the sample gas into the heat preservation pipe assembly (2) of the gas analysis test device according to any one of claims 1 to 14; According to the test requirements, controlling the on-off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch to feed the sample gas into the gas component analysis cabinet (3) or the smoke analysis cabinet (4) for analysis.

16. The gas analysis test method according to claim 15, wherein, The step of controlling the on-off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch according to the test requirements to feed the sample gas into the gas component analysis cabinet (3) or the smoke analysis cabinet (4) for analysis specifically includes: For the whole machine or a sector combustion chamber, turning on the first branch, the third branch, and the fifth branch; turning off the second branch and the fourth branch; Feeding the sample gas into at least two heat preservation pipes of the heat preservation pipe assembly (2); Each of the heat preservation pipes transports the sample gas to the mixer (1) for mixing; The mixed sample gas enters the gas component analysis cabinet (3) through the third branch for pollution emission analysis.

17. The gas analysis test method according to claim 16, characterized in that, It further includes the following steps: The mixed sample gas enters the smoke analysis cabinet (4) through the fifth branch for a smoke test.

18. The gas analysis test method according to claim 15, wherein The step of controlling the on-off states of the first branch, the second branch, the third branch, the fourth branch, and the fifth branch according to the test requirements to feed the sample gas into the gas component analysis cabinet (3) or the smoke analysis cabinet (4) for analysis specifically includes: For an annular combustion chamber, if one or two independent sampling rakes are used, first conduct a pollution emission test, and then conduct a gas analysis method temperature measurement test; if one mixed sampling rake is used, conduct a pollution emission test.

19. The gas analysis test method according to claim 18, characterized in that, For the annular combustion chamber, if one or two independent sampling rakes are used, first conduct a pollution emission test, and then conduct a gas analysis method temperature measurement test, which specifically includes the following steps: Switch the first branch and the third branch to the on state, and switch the second branch, the fourth branch, and the fifth branch to the off state; Transport the sample gas in the independent sampling rake to the heat preservation pipe assembly (2); The sample gas enters the mixer (1) through the first branch for mixing; The mixed sample gas enters the gas component analysis cabinet (3) through the third branch; The mixed sample gas enters the smoke analysis cabinet (4) through the fifth branch; Switch the first branch, the third branch, and the fifth branch to the off state, and switch the second branch and the fourth branch to the on state; Transport the sample gas in the independent sampling rake to the gas component analysis cabinet (3) through the heat preservation pipe assembly (2) and the second branch.

20. The gas analysis test method according to claim 18, characterized in that, If a hybrid sampling rake is adopted, a pollution emission test and a smoke test are carried out, which specifically include the following steps: Switch the first branch, the third branch, and the fifth branch to the cut-off state, and switch the second branch and the fourth branch to the conducting state; Transport the sample gas in the hybrid sampling rake to the gas composition analysis cabinet (3) through the heat preservation pipe assembly (2) and the second branch; Transport the sample gas in the hybrid sampling rake to the smoke analysis cabinet (4) through the heat preservation pipe assembly (2) and the fourth branch.

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