An experimental device for sampling carbon soot from space station combustion

Abstract

The present application provides an experimental device for sampling carbon soot from space station combustion, which belongs to the technical field of microgravity combustion and combustion diagnostic systems. Specifically, it includes a mounting base for connecting to the burner mounting position on the gas experiment plug-in; a multi-jet burner, which is mounted on the mounting base. The multi-jet burner includes a fuel pipe and a trailing gas channel. The end of the multi-jet burner away from the mounting base serves as the combustion end. The fuel and the trailing gas are ignited after merging at the combustion end; a sampling assembly, which is detachably mounted on the combustion end. The sampling assembly includes multiple probes. The sampling ends of the probes contact the flame of the fuel combustion to sample the carbon soot from the fuel combustion; a protective cover, which is detachably connected to the sampling assembly. The protective cover is used to surround the probe. The protective cover is connected to the sampling assembly after the fuel is burned and the sampling assembly completes sampling. This application can be applied to the space station combustion science experiment system to achieve functions such as igniting flames and collecting carbon soot samples.

Description

Technical Field

[0001] The present application relates to the field of microgravity combustion and combustion diagnostic systems, and in particular to an experimental device for sampling carbon soot from space station combustion. Background Art

[0002] Soot formation is a key phenomenon during aviation fuel combustion, and controlling soot formation is crucial for aircraft safety and service life. Soot generated during aviation fuel combustion can precipitate, aggregate, and grow on the surfaces of components such as nozzles, forming carbon deposits. When these deposits reach a certain level, they can even clog the engine nozzles, increasing fuel consumption, reducing power performance, and causing severe flame erosion, posing a serious threat to aircraft flight safety. To achieve soot control, in-depth research into the mechanisms of soot formation is urgently needed. In microgravity, natural convection is weakened or even eliminated, simplifying combustion and flow problems. The flames are larger, with higher radiation intensity and soot content, and longer residence times than on Earth, creating ideal conditions for studying soot formation.

[0003] The space station has been fully constructed and entered the application and development phase. The station's combustion science experimental system is equipped to conduct microgravity combustion experiments. To conduct combustion experiments and collect soot samples on the space station, a burner and sampling device compatible with the station's experimental equipment are required, with optimized design for ergonomics and reliability. Summary of the Invention

[0004] In view of this, the present application provides an experimental device for sampling carbon soot from space station combustion, which solves the problems in the existing technology and can be applied to the space station combustion science experiment system to realize functions such as igniting flames and collecting carbon soot samples.

[0005] The experimental device for sampling soot from space station combustion provided in this application adopts the following technical solution:

[0006] An experimental device for sampling combustion soot in a space station, which is installed on a gas experiment plug-in in space, includes:

[0007] A mounting base, used to connect to the burner mounting position on the gas experiment plug-in;

[0008] a multi-jet burner mounted on the mounting base, the multi-jet burner comprising a fuel pipe and a wake gas channel, the fuel pipe being used to convey fuel, the wake gas channel being used to convey wake gas, the end of the multi-jet burner away from the mounting base serving as a combustion end, the fuel and wake gas being ignited after converging at the combustion end;

[0009] A sampling assembly is detachably mounted on the combustion end, the sampling assembly comprising a plurality of probes, wherein the sampling ends of the probes contact the flame of the fuel combustion to sample the combustion soot of the fuel;

[0010] The protective cover is detachably connected to the sampling assembly and is used to surround the probe. The protective cover is separated from the sampling assembly when the fuel is burning, and is connected to the sampling assembly after the fuel is burned and the sampling assembly completes sampling.

[0011] Optionally, the multi-jet burner includes a base, a support, an outer tube, a top cover and a plurality of the fuel pipes, the base is provided with a central through hole and accompanying air holes distributed around the central through hole, the central through hole is used for allowing the plurality of the fuel pipes to pass through, the fuel pipe is fixed to the base through the support, the outer tube is connected to the base around one end, and the outer tube is around the support and the fuel pipe, the channel between the outer tube and the fuel pipe is connected to the accompanying air hole, the top cover is connected to the other end of the outer tube, the sampling assembly is installed on the top cover, the top cover is provided with an opening, the end of the fuel pipe away from the base passes through the opening, the accompanying air hole, the outer tube and the opening form the accompanying air channel.

[0012] Optionally, a rectifying plate is provided in the opening of the top cover, a passage for the accompanying gas to pass through is provided on the rectifying plate, and a hole for the fuel pipe to pass through is provided on the rectifying plate.

[0013] Optionally, the top cover is provided with a first guide groove, one end of the first guide groove passes through the outer peripheral side surface of one side of the top cover, the sampling assembly includes a sampling base, a mounting plate and a pressure cover, the sampling base includes a first guide rail for slidingly cooperating with the first guide groove, the mounting plate is fixed to the sampling base, a plurality of first mounting positions for mounting probes are provided on the mounting plate, the pressure cover is provided with a through hole for the probe to pass through, the pressure cover is fixed to the mounting plate by bolts, and the sampling base is connected to the top cover by a detachable clamping structure;

[0014] The end face of the top cover away from the base is the first end face, the first end face is perpendicular to the length direction of the outer tube, and the length of the first guide groove is parallel to the first end face.

[0015] Optionally, the sampling assembly also includes a second base connected to the sampling base, the second base is provided with a second guide groove perpendicular to the first end face, the protective cover includes a cover body and a second guide rail connected to each other, the second guide rail is used to slide in cooperation with the second guide groove, after the first guide rail and the second guide groove are cooperated, the second base and the cover body are connected by a detachable clamping structure, the cover body is provided with an opening at one end facing the sampling base, when the protective cover and the second base are cooperated, the probe passes through the opening and enters the cover body, a plurality of L-shaped rods are provided in the cover body, the L-shaped rods are located between the plurality of probes, the L-shaped rods and the openings are arranged correspondingly, one end of the L-shaped rod is parallel to the first end face, and the other end of the L-shaped rod is perpendicular to the second end face.

[0016] Optionally, an identification structure is provided on the outer surface of the protective cover, and the identification structure is used to indicate the installation direction when the protective cover and the sampling assembly are docked and the force direction when the protective cover and the sampling assembly are separated.

[0017] Optionally, the snap-fit ​​structure includes a first bead arranged on the end surface of the top cover away from the base and a first matching hole arranged on the sampling base, the first bead is located on the side of the top cover through which the first guide groove passes, the sampling base includes a matching cover connected to the first guide rail, the matching cover covers part of the first end surface, the first matching hole is arranged on the side of the matching cover facing the first end surface, the first matching hole and the first bead are correspondingly matched, and the top cover and the sampling base are snap-fitted when the first bead is located in the first matching hole.

[0018] Optionally, the mounting seat is a rectangular plate structure, and the four corners of the mounting seat are connected to the burner mounting position on the gas experiment plug-in by bolts. The mounting seat is provided with a pin groove, and the pin groove is used to cooperate with the pin on the gas experiment plug-in for positioning.

[0019] Optionally, the plurality of combustion tubes are distributed in sequence along a first straight line at intervals, and an angle between the first straight line and a straight side of the rectangular mounting seat is 45°.

[0020] Optionally, an anti-reverse column is provided on the base, and the anti-reverse column interferes with a part of the structure on the gas experiment plug-in when the experimental device is incorrectly installed.

[0021] In summary, this application has the following beneficial technical effects:

[0022] The experimental device can be used in the space station combustion science experimental system to ignite the flame and perform soot sampling, solving the experimental device problem of conducting microgravity soot experiments on the space station.

[0023] The multi-jet burner features multiple fuel jet nozzles, enabling the formation of linked jet flames for studying flame interactions. The multiple fuel jet nozzles are angled relative to the burner envelope to accommodate the spatial positioning of optical imaging equipment. The burner base features anti-reflection posts to prevent mechanical interference with other components of the combustion science experimental system and prevent the burner from being installed upside down.

[0024] A protective cover is installed on the sampling cover through a guide rail-guide groove structure, and positioning and fixation are achieved by a snap-fit ​​structure of a bump bead and a matching hole to prevent the risk of injury from the tip of the sampling probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of the experimental device used for sampling soot from combustion in the space station;

[0027] Figure 2 A top view of the experimental setup for this application;

[0028] Figure 3 This is a schematic diagram of the explosion structure of the experimental device of this application;

[0029] Figure 4 A schematic diagram of the structure of the mounting seat and base for this application;

[0030] Figure 5 This is a schematic diagram of the structure of the support and combustion tube of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the outer tube of this application;

[0032] Figure 7 This is a schematic diagram of the structure of the top cover and rectifier plate of this application;

[0033] Figure 8 A schematic diagram of the sampling assembly for this application;

[0034] Figure 9 This is a schematic diagram of the structure of the second alignment slot on the sampling base of this application;

[0035] Figure 10 This is a schematic diagram of the structure of the sampling base, second base and mounting plate of this application;

[0036] Figure 11 This is a schematic structural diagram of the first matching hole of this application;

[0037] Figure 12 This is a schematic diagram of the structure of one side of the gland of this application;

[0038] Figure 13 This is a schematic diagram of the structure of the other side of the gland in this application;

[0039] Figure 14 This is a schematic diagram of the outer structure of the protective cover of this application;

[0040] Figure 15 This is a schematic diagram of the inner structure of the protective cover of this application.

[0041] Description of reference numerals:

[0042] 1. Multi-jet burner; 11. Base; 111. Air flow hole; 112. Center hole; 113. Anti-reverse column; 114. Pin slot; 115. Captive screw hole; 121. Support; 122. Second sealing ring; 123. Fuel pipe; 124. Pressing cover; 131. Outer tube; 132. Sealing groove; 133. First sealing ring; 141. Top cover; 142. Opening; 143. Rectifier plate; 145. First bumper; 146. First guide groove; 1461. First guide end; 147. First alignment groove; 2. Sampling assembly; 21. Sampling base; 211. First mounting position; 212. Sampling cover pin; 213. First bolt through hole; 214. First guide rail; 215. Second guide groove; 2151. Second guide end; 216. First matching hole; 217. Second matching hole; 218. Second alignment groove; 22. Pressing cover; 221. Through hole; 223. Positioning hole; 23. Probe; 31. Protective cover; 32. L-shaped rod; 33. Pressing plate; 34. Arrow mark; 35. Second guide rail; 351. Enlargement block; 36. Second bumper. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0045] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0046] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0047] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0048] An embodiment of the present application provides an experimental device for sampling carbon soot from space station combustion.

[0049] The invention discloses an experimental device for sampling carbon soot from combustion in a space station, and is used for being installed on a gas experiment plug-in in space.

[0050] like Figure 1 and Figure 2 As shown, the experimental setup includes:

[0051] The mounting seat is used to connect with the burner mounting position on the gas experiment plug-in.

[0052] A multi-jet burner 1 is mounted on the mounting base and includes a fuel pipe 123 for transporting fuel and a trailing gas channel for transporting trailing gas. The end of the multi-jet burner 1 away from the mounting base serves as the combustion end, where the fuel and trailing gas meet and are ignited. The number of fuel pipes 123 can be one or more, depending on actual needs.

[0053] The sampling assembly 2 is detachably mounted on the combustion end and includes a plurality of probes 23. The sampling ends of the probes 23 contact the flame of the fuel combustion to sample the combustion soot of the fuel. In the embodiment of the present application, the probes 23 are specially arranged according to the design.

[0054] The protective cover 31 is detachably connected to the sampling assembly 2 and is used to surround the probe 23. The protective cover 31 is separated from the sampling assembly 2 during fuel combustion. The protective cover 31 is connected to the sampling assembly 2 after the fuel is burned and the sampling assembly 2 has completed sampling, protecting the probe 23 after sampling and preventing the risk of injury from the tip of the sampling probe 23. The protective cover 31 needs to be removed when conducting ignition and soot collection experiments. In the embodiment of the present application, the outer surface of the protective cover 31 is engraved with the words "Protective cover 31" and "CAUTION: DO NOT TOUCH THE PROBE".

[0055] like Figure 3 、 Figure 4 and Figure 5 As shown, the multi-jet burner 1 includes a base 11, a support 121, an outer tube 131, a top cover 141 and a plurality of fuel tubes 123. The base 11 is provided with a central through hole 112 and accompanying gas through holes 111 distributed around the periphery of the central through hole 112. The central through hole 112 is used for allowing the plurality of fuel tubes 123 to pass through. The fuel tubes 123 are fixed to the base 11 through the support 121. The outer tube 131 is connected to the base 11 around one end, and the outer tube 131 is connected to the base 11 around one end. 1 surrounds the outer circumference of the support 121 and the fuel pipe 123. The passage between the outer pipe 131 and the fuel pipe 123 communicates with the wake gas through hole 111. The top cover 141 is connected to the other end of the outer pipe 131. The sampling assembly 2 is installed on the top cover 141. The top cover 141 is provided with an opening 142. The end of the fuel pipe 123 away from the base 11 passes through the opening 142. The wake gas through hole 111, the inner part of the outer pipe 131, and the opening 142 form the wake gas channel.

[0056] In the implementation of this application, a circular hole for the combustion tube to pass through is provided on the support 121, and a pressing cover 124 is provided on the end face of the support 121 facing away from the base 11. The fuel pipe 123 passes through the pressing cover 124. A second sealing ring 122 is sleeved on the outer periphery of the fuel pipe 123. The second sealing ring 122 is located between the pressing cover 124 and the support 121. The pressing cover 124 is fixed to the support 121 by bolts, and the pressing cover 124 presses the second sealing ring 122 on the support 121. The second sealing ring 122 seals the gaps between the fuel pipe 123 and the pressing cover 124, as well as between the fuel pipe 123 and the support 121. Figure 6 As shown, a first sealing ring 133 is provided between the outer tube 131 and the top cover 141, and a sealing groove 132 is provided on the outer tube 131 to accommodate the first sealing ring 133, thereby achieving sealing between the outer tube 131 and the top cover 141. The outer wall of the outer tube 131 may have the words "multi-jet burner".

[0057] The mounting base is a rectangular plate-like structure, with its four corners connected to the burner mounting position on the gas experiment insert via bolts. The mounting base is provided with pin slots 114 for mating with pins on the gas experiment insert for positioning. In this embodiment of the present application, the four corners of the mounting base are connected to the burner mounting position on the gas experiment insert via captive screws, and captive screw holes 115 are provided at the four corners of the mounting base.

[0058] The multiple combustion tubes are sequentially spaced along a first straight line, with the first straight line and a straight side of the rectangular mounting base forming an angle of 45°. This allows the flame at the outlet of the fuel tube 123 to match the viewing angle of the optical observation device, so that the flame at the outlet of the fuel tube 123 adapts to the spatial position of the optical imaging device.

[0059] The base 11 is provided with an anti-reverse column 113 , which interferes with a part of the structure on the gas experiment plug-in when the experimental device is incorrectly installed.

[0060] like Figure 7 As shown, a rectifying plate 143 is provided in the opening 142 of the top cover 141 . The rectifying plate 143 is provided with a passage for the accompanying gas to pass through. The rectifying plate 143 is provided with a hole for the fuel pipe 123 to pass through.

[0061] like Figure 7-10 As shown, the top cover 141 is provided with a first guide groove 146, one end of the first guide groove 146 passes through the outer peripheral side surface of one side of the top cover 141, the sampling assembly 2 includes a sampling base 21, a mounting plate and a pressure cover 22, the sampling base 21 includes a first guide rail 214 for slidingly fitting with the first guide groove 146, the mounting plate is fixed on the sampling base 21, and a plurality of first mounting positions 211 for mounting the probe 23 are provided on the mounting plate, as shown in FIG. Figure 12 and Figure 13 As shown, the gland 22 is provided with a through-hole 221 through which the probe 23 passes. The through-hole 221 gradually decreases in size from the side closest to the mounting plate to the side further away from the mounting plate. The gland 22 is fixed to the mounting plate by bolts, and the sampling base 21 is connected to the top cover 141 via a detachable snap-fit ​​structure. In this embodiment of the present application, the outer surface of the sampling base 21 is engraved with the word "sampling", and the outer peripheral side of the top cover 141 may be engraved with the word "sampling entrance".

[0062] The end face of the top cover 141 away from the base 11 is the first end face, the first end face is perpendicular to the length direction of the outer tube 131, and the length of the first guide groove 146 is parallel to the first end face. A first alignment groove 147 is provided on the outer peripheral side of the top cover 141, and a second alignment groove 218 is provided on the sampling base 21. After the top cover 141 and the sampling base 21 are correctly combined, the first alignment groove 147 and the second alignment groove 218 are aligned, and the open end of the first guide groove 146 is provided with a first guide end 1461 with a conical expansion. The first guide groove 146 is a T-shaped slide groove. The sampling cover pin 212 is installed on the mounting plate, and a positioning hole 223 for cooperating with the sampling cover pin 212 is provided on the pressure cover 22 for positioning the pressure cover 22 during installation. An O-ring or glue is provided in the through hole 221 of the pressure cover 22 for fixing the probe 23, and a first bolt hole for bolt connection is provided on the mounting plate and the pressure cover 22.

[0063] like Figure 7 and Figure 11 As shown, the coupling structure between the top cover 141 and the sampling base 21 includes a first bead 145 disposed on the end face of the top cover 141 facing away from the base 11, and a first mating hole 216 disposed on the sampling base 21. The first bead 145 is located on the side of the top cover 141 proximal to the side through which the first guide slot 146 passes. The sampling base 21 includes a mating cover connected to the first guide rail 214, which covers a portion of the first end face. The first mating hole 216 is disposed on the side of the mating cover facing the first end face. The first mating hole 216 and the first bead 145 are correspondingly matched. When the first bead 145 is located in the first mating hole 216, the top cover 141 and the sampling base 21 are engaged. In this embodiment, two first bead 145 are provided, and the line connecting the two first bead 145 is perpendicular to the length of the first guide slot 146. A conical guide head is provided on the end of the first guide rail 214 away from the mating cover.

[0064] like Figure 10 、 Figure 14 and Figure 15As shown, the sampling assembly 2 also includes a second base connected to the sampling base 21, and the second base is provided with a second guide groove 215 perpendicular to the first end face. The protective cover 31 includes a cover body and a second guide rail 35 connected to each other, and the second guide rail 35 is used to cooperate and slide with the second guide groove 215. After the first guide rail 214 and the second guide groove 215 cooperate, the second base and the cover body are connected by a detachable clamping structure. The cover body is provided with an opening at one end facing the sampling base 21. When the protective cover 31 and the second base cooperate, the probe 23 passes through the opening and enters the cover body. A plurality of L-shaped rods 32 are provided in the cover body, and the L-shaped rods 32 are located between the plurality of probes 23. The L-shaped rods 32 and the opening are arranged correspondingly, one end of the L-shaped rod 32 is parallel to the first end face, and the other end of the L-shaped rod 32 is perpendicular to the first end face. The L-shaped rod 32 is fixed to the cover body by a pressing piece 33.

[0065] When the protective cover 31 is installed on the sampling assembly 2, the probe 23 enters the cavity inside the protective cover 31 to realize the protection function of the probe 23. The L-shaped rod 32 is used to reduce the width of the exposed gap of the protective cover 31 to further prevent fingers from entering the protective cover 31.

[0066] In the embodiment of the present application, the second guide groove 215 is a T-shaped guide groove, and an end of the second guide groove 215 away from the sampling base 21 is provided with a second guide end 2151 in an expanded configuration.

[0067] The snap-fitting structure between the second base and the cover body includes a second bumper 36 provided on the cover body and a second matching hole 217 provided on the second base. After the protective cover 31 and the second base are correctly combined, the second bumper 36 falls into the second matching hole 217.

[0068] like Figure 14 As shown, the outer surface of the protective cover 31 is provided with an identification structure, which is used to indicate the installation direction when the protective cover 31 and the sampling assembly 2 are docked and the force direction when the protective cover 31 and the sampling assembly 2 are separated. In the embodiment of the present application, the identification structure includes a tapered guide end of the second guide rail 35 close to the first end face, an enlarged block 351 arranged at the other end of the second guide rail 35, and an arrow mark 34 arranged on the outer periphery of the protective cover.

[0069] In one embodiment, there are three fuel pipes 123, spaced 5.5 mm apart. There are eight wake gas holes 111, each with a diameter of 1 mm. Eight probes 23 are made of stainless steel and have a diameter of 0.7 mm. The tips of the probes 23 are positioned directly above the fuel pipes 123. There are two L-shaped rods 32, ensuring that the width of the exposed gap in the protective cover 31 does not exceed 5 mm.

[0070] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An experimental device for sampling soot from space station combustion, characterized in that: For installation on a gas experiment plug-in in space, the experimental device includes: A mounting base, used to connect to the burner mounting position on the gas experiment plug-in; A multi-jet burner (1) is mounted on the mounting seat, the multi-jet burner (1) comprising a fuel pipe (123) and a trailing gas channel, the fuel pipe (123) being used to transport fuel, the trailing gas channel being used to transport trailing gas, the end of the multi-jet burner (1) away from the mounting seat serving as a combustion end, the fuel and trailing gas being ignited after merging at the combustion end; A sampling assembly (2) is detachably mounted on the combustion end, the sampling assembly (2) comprising a plurality of probes (23), the sampling ends of the probes (23) contacting the flame of the fuel combustion to sample the combustion soot of the fuel; A protective cover (31) is detachably connected to the sampling assembly (2). The protective cover (31) is used to surround the probe (23). The protective cover (31) is separated from the sampling assembly (2) when the fuel is burned. The protective cover (31) is connected to the sampling assembly (2) after the fuel is burned and the sampling assembly (2) completes sampling.

2. The experimental device for sampling soot from space station combustion according to claim 1, characterized in that: The multi-jet burner (1) comprises a base (11), a support (121), an outer tube (131), a top cover (141) and a plurality of fuel tubes (123); the base (11) is provided with a central through hole (112) and accompanying gas through holes (111) distributed around the periphery of the central through hole (112); the central through hole (112) is used for allowing the plurality of fuel tubes (123) to pass through; the fuel tubes (123) are fixed to the base (11) via the support (121); the outer tube (131) is connected to the base (11) around one end, and the outer tube (131) Surrounding the outer circumference of the support (121) and the fuel pipe (123), the passage between the outer pipe (131) and the fuel pipe (123) is connected to the accompanying air hole (111), the top cover (141) is connected to the other end of the outer pipe (131), the sampling assembly (2) is installed on the top cover (141), and the top cover (141) is provided with an opening (142), and the end of the fuel pipe (123) away from the base (11) passes through the opening (142), and the accompanying air hole (111), the outer pipe (131) and the opening (142) form the accompanying air channel.

3. The experimental device for sampling soot from space station combustion according to claim 2, characterized in that: A rectifying plate (143) is provided in the opening (142) of the top cover (141), a passage for accompanying gas to pass through is provided on the rectifying plate (143), and a hole for the fuel pipe (123) to pass through is provided on the rectifying plate (143).

4. The experimental device for sampling soot from space station combustion according to claim 2, characterized in that: The top cover (141) is provided with a first guide groove (146), one end of the first guide groove (146) passes through the outer peripheral side surface of one side of the top cover (141), the sampling assembly (2) comprises a sampling base (21), a mounting plate and a pressure cover (22), the sampling base (21) comprises a first guide rail (214) for slidingly cooperating with the first guide groove (146), the mounting plate is fixed on the sampling base (21), a plurality of first mounting positions for mounting the probe (23) are provided on the mounting plate, the pressure cover (22) is provided with a through hole (221) through which the probe (23) passes, the pressure cover (22) is fixed to the mounting plate by bolts, and the sampling base (21) is connected to the top cover (141) by a detachable clamping structure; The end face of the top cover (141) away from the base (11) is a first end face, the first end face is perpendicular to the length direction of the outer tube (131), and the length of the first guide groove (146) is parallel to the first end face.

5. The experimental device for sampling soot from space station combustion according to claim 4, characterized in that: The sampling assembly (2) further comprises a second base connected to the sampling base (21), the second base being provided with a second guide groove (215) perpendicular to the first end face, the protective cover (31) comprising a cover body and a second guide rail (35) connected to each other, the second guide rail (35) being used for sliding in cooperation with the second guide groove (215), and the second base and the cover body being connected via a detachable snap-fit ​​structure after the first guide rail (214) and the second guide groove (215) are engaged, the cover body being provided with an opening at one end facing the sampling base (21), and when the protective cover (31) and the second base are engaged, the probe (23) passes through the opening and enters the cover body, a plurality of L-shaped rods (32) being provided in the cover body, the L-shaped rods (32) being located between the plurality of probes (23), the L-shaped rods (32) and the opening being arranged correspondingly, one end of the L-shaped rod (32) being parallel to the first end face, and the other end of the L-shaped rod (32) being perpendicular to the second end face.

6. The experimental device for sampling soot from space station combustion according to claim 5, characterized in that: The outer surface of the protective cover (31) is provided with an identification structure, and the identification structure is used to indicate the installation direction when the protective cover (31) and the sampling assembly (2) are docked and the force direction when the protective cover (31) and the sampling assembly (2) are separated.

7. The experimental device for sampling soot from space station combustion according to claim 4, characterized in that: The clamping structure includes a first bumping bead (145) arranged on the end surface of the top cover (141) away from the base (11) and a first matching hole (216) arranged on the sampling base (21), the first bumping bead (145) is located on the side of the top cover (141) penetrated by the first guide groove (146), the sampling base (21) includes a matching cover connected to the first guide rail (214), the matching cover covers a part of the first end surface, the first matching hole (216) is arranged on the side of the matching cover facing the first end surface, the first matching hole (216) and the first bumping bead (145) are correspondingly matched, and when the first bumping bead (145) is located in the first matching hole (216), the top cover (141) and the sampling base (21) are clamped.

8. The experimental device for sampling soot from space station combustion according to claim 2, characterized in that: The mounting seat is a rectangular plate-shaped structure. The four corners of the mounting seat are connected to the burner mounting position on the gas experiment plug-in through bolts. The mounting seat is provided with a pin groove (114), and the pin groove (114) is used to cooperate with the pin on the gas experiment plug-in for positioning.

9. The experimental device for sampling soot from space station combustion according to claim 8, characterized in that: The plurality of combustion tubes are sequentially spaced apart and distributed along a first straight line, and an angle between the first straight line and a straight side of the rectangular mounting seat is 45°.

10. The experimental device for sampling soot from space station combustion according to claim 2, characterized in that: An anti-reverse column (113) is provided on the base (11), and the anti-reverse column (113) interferes with a part of the structure on the gas experiment plug-in when the experimental device is incorrectly installed.

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