Liquid propellant electromagnetic induction heating device for mass spectrum online sampling detection

Abstract

The invention relates to the technical field of mass spectrometry, in particular to a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling detection. The device comprises a frame, a propellant sample injector, a mass spectrometer sampling cone, an electromagnetic induction heating coil and a reaction table cylinder, the reaction table cylinder vertically penetrates through the bottom face of the frame, and the electromagnetic induction heating coil is located on the upper surface of the reaction table cylinder. And a sample introduction end of the propellant sample injector and a sampling end of the mass spectrum sampling cone correspond to a central heating area on the electromagnetic induction heating coil. The electromagnetic induction heating coil is electrified, so that a heating area in front of the center of the electromagnetic induction heating coil is rapidly heated to form a high-temperature reaction micro-area, the liquid propellant is rapidly introduced into the high-temperature reaction micro-area before physical and chemical state changes, and the sampling end of the mass spectrum sampling cone directly extends into the high-temperature reaction micro-area; and effective online sampling and rapid detection of intermediate products in the reaction process are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mass spectrometry, in particular to a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection. BACKGROUND

[0002] Liquid propellant, as a special kind of high-energy chemical substance, is a key core material for aerospace equipment. It can chemically react in the engine to produce high-temperature and high-pressure gas, convert chemical energy into heat and kinetic energy, and form a certain thrust to drive the target aircraft to complete the intended action. In recent years, green liquid propellant has become an important direction and inevitable trend of aerospace power development to replace traditional toxic hydrazine propellant, so the mechanism research on the decomposition and combustion reaction process of liquid propellant has become a research hotspot.

[0003] New green liquid propellant often contains oxidizing agent, combustion agent, solvent and additive, etc., which is a mixed ionic solution. In actual application, the propellant is introduced into the catalyst bed or high-temperature combustion chamber in the form of microdroplets, directly contacts the catalyst or electromagnetic induction heating coil and rapidly decomposes and combusts, produces high-temperature and high-pressure gas and diffuses out through the tail nozzle to form thrust. The decomposition and combustion process of liquid propellant is studied by using traditional flow tube reactor. In order to make the temperature of the reaction zone reach the target value, the adjacent area is also heated to a relatively high temperature by the heating furnace. The propellant is heated to a higher temperature by the peripheral system before reaching the reaction zone, and the phase change and decomposition reaction occur in the capillary tube in advance, which cannot truly simulate the actual application conditions, and even the problem of component crystallization and plugging of capillary tube occurs.

[0004] In addition, mass spectrometry, especially advanced vacuum photoionization mass spectrometry, can detect reaction intermediates on the basis of breaking the molecular structure, and provide reliable experimental evidence for the mechanism research of chemical reaction process. However, since the decomposition and combustion reaction of liquid propellant is a millisecond-level rapid process, the ordinary mass spectrometer cannot effectively capture the reaction intermediates due to the long time difference caused by the position difference between sampling and detection. SUMMARY

[0005] Therefore, the present application provides a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection.

[0006] To this end, the present application provides the following technical solutions: The application discloses a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection, which comprises a frame, a propellant sampler, a mass spectrometer sampling cone, a reaction bench cylinder and an electromagnetic induction heating coil.

[0007] Further, the reaction bench cylinder is installed on the bottom surface of the frame through a reaction bench butt flange, and an air inlet pipe and an air outlet pipe which are in communication with the reaction cavity are respectively installed on the sidewall of the reaction bench butt flange.

[0008] Further, a sealing locking gasket is installed between the reaction bench butt flange and the reaction bench cylinder, a reaction bench locking flange is threadedly installed below the sealing locking gasket on the reaction bench cylinder, and the upper end of the reaction bench locking flange is in abutment with the lower end of the sealing locking gasket.

[0009] Further, a high-temperature-resistant insulator is installed on the upper end of the reaction bench cylinder, the electromagnetic induction heating coil is located on the upper surface of the high-temperature-resistant insulator, and an electromagnetic induction heat accumulator is installed on the high-temperature-resistant insulator and corresponds to the central heating area of the electromagnetic induction heating coil.

[0010] Further, two third mounting plates are overlapped and installed on the surface of the frame which fixes the electric input end and the electric output end of the electromagnetic induction heating coil, coil mounting holes are arranged at the same positions of the two third mounting plates, annular coil mounting grooves are formed on the opposite inner sides of the two third mounting plates outside the coil mounting holes, a coil sealing mounting plate is installed in the coil mounting groove, and the electric input end and the electric output end of the electromagnetic induction heating coil respectively penetrate through the coil sealing mounting plate and are fixed.

[0011] Further, two first mounting plates are overlapped and installed on the surface of the frame which installs the propellant sampler, sealing holes are arranged at the same positions of the two first mounting plates, annular sealing grooves are formed on the opposite inner sides of the two first mounting plates outside the sealing holes, a sealing plate is installed in the sealing groove, and the propellant sampler penetrates through the sealing plate and is fixed.

[0012] Further, a mass spectrometer butt flange is installed on the surface of the frame which corresponds to the mass spectrometer sampling cone, the frame is sealingly installed on a mass spectrometry detection device through the mass spectrometer butt flange, and the mass spectrometer sampling cone is connected with the mass spectrometry detection device.

[0013] Further, two second mounting plates are mounted on the remaining surfaces of the frame, glass mounting holes are arranged on the same positions of the two second mounting plates, and annular mounting grooves are formed on the opposite inner sides of the two second mounting plates outside the glass mounting holes, and the optical glass is mounted in the mounting grooves.

[0014] Further, the optical glass is at least one selected from high-transparency quartz glass, infrared light-transmitting glass, ultraviolet light-transmitting glass and laser light-transmitting glass.

[0015] Further, the vertical distance between the electromagnetic induction heat accumulator and the reaction table cylinder is at least 2 times the thickness of the electromagnetic induction heating coil.

[0016] Advantages and positive effects of the present application: By energizing the electromagnetic induction heating coil, the center heating area of the electromagnetic induction heating coil is rapidly heated to form a high-temperature reaction micro area, and the surrounding environment is still in a low-temperature state. Before the liquid propellant changes in physical and chemical states, the high-temperature reaction micro area is rapidly introduced, and the actual application high-temperature working condition reaction is simulated. By directly inserting the sampling end of the mass spectrometry sampling cone into the high-temperature reaction micro area, effective online sampling and rapid detection of intermediate products in the reaction process are realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A structural diagram of a first embodiment of a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection provided by the present application.

[0019] Figure 2 A sectional view of the first embodiment of the liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection provided by the present application.

[0020] Figure 3 A structural diagram of a second embodiment of a liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection provided by the present application.

[0021] Figure 4 A sectional view of the second embodiment of the liquid propellant electromagnetic induction heating device for mass spectrometry online sampling and detection provided by the present application.

[0022] In the figure: 1, mass spectrometer sampling cone; 2, reaction cavity; 3, frame; 4, mass spectrometer flange; 5, reaction table flange; 6, gas inlet pipe; 7, gas outlet pipe; 8, second mounting plate; 9, optical glass; 10, first mounting plate; 11, electromagnetic induction heat accumulator; 12, reaction table cylinder; 13, locking nut; 14, sealing locking gasket; 15, reaction table locking flange; 16, propellant sampler; 17, sealing plate; 18, electromagnetic induction heating coil; 19, high-temperature-resistant insulator; 20, sealing groove; 21, glass mounting hole; 22, mounting groove; 23, sealing hole; 24, third mounting plate; 25, coil mounting hole; 26, coil mounting groove; 27, coil sealing mounting plate. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] The present application provides a kind of liquid propellant electromagnetic induction heating device for mass spectrometry online sampling detection, as shown in Figures 1-2 It includes frame 3, propellant sampler 16, mass spectrometer sampling cone 1, electromagnetic induction heating coil 18 and reaction table cylinder 12, reaction cavity 2 is arranged in frame 3, reaction table cylinder 12 vertically penetrates the bottom surface of frame 3, the upper end is installed high-temperature-resistant insulator 19, electromagnetic induction heating coil 18 is located on the upper surface of high-temperature-resistant insulator 19, and electromagnetic induction heat accumulator 11 is installed on the center heating area of high-temperature-resistant insulator 19 corresponding to electromagnetic induction heating coil 18.

[0025] The reaction bench cylinder body 12 is installed on the bottom surface of the frame 3 through the reaction bench butt flange 5, and the gas inlet pipe 6 and the gas outlet pipe 7 are respectively installed on the side wall of the reaction bench butt flange 5 and are in communication with the reaction cavity 2. One or more than two of the ball valve, the safety pressure relief valve, the pressure gauge and the pressure sensor can be installed on the gas inlet pipe 6 and the gas outlet pipe 7. The sealing locking gasket 14 is installed between the reaction bench butt flange 5 and the reaction bench cylinder body 12, and the reaction bench locking flange 15 is threadedly installed below the sealing locking gasket 14 on the reaction bench cylinder body 12, and the upper end of the reaction bench locking flange 15 abuts against the lower end of the sealing locking gasket 14. The sealing locking gasket 14 can be one or more than two, and the material can be one or more than two of polytetrafluoroethylene, graphite, composite graphite, silica gel and the like. The rotation of the reaction bench cylinder body 12 further drives the reaction bench cylinder body 12 to move up and down through the threaded transmission, so as to change the distance between the high-temperature heat accumulator 11 and the sampling end of the mass spectrometry sampling cone 1. The vertical distance between the electromagnetic induction heat accumulator 11 and the reaction bench cylinder body 12 is at least 2 times the thickness of the electromagnetic induction heating coil 18. The electromagnetic induction heat accumulator 11 needs to be able to conduct electricity to generate electromagnetic induction, and can be inorganic non-metallic temperature-resistant materials and temperature-resistant metal materials, such as graphite, stainless steel, high-temperature resistant alloy and the like. The surface of the reaction bench cylinder body 12 in contact with the reaction bench sealing locking gasket 14 is a smooth surface, the reaction bench sealing locking gasket 14 is pressed by the reaction bench locking flange 15 to make the reaction bench sealing locking gasket 14 in sealing contact with the reaction bench cylinder body 12, and the relative movement of the reaction bench cylinder body 12 relative to the frame 3 up and down can be ensured under the condition of sealing.

[0026] The propellant sampler 16 can be a thin tube or a capillary tube atomizing nozzle. The propellant sampler can drop the propellant into the high-temperature reaction zone in liquid form, or can spray the propellant into the high-temperature micro-reaction zone in a spraying manner.

[0027] The propellant sampler 16 and the mass spectrometry sampling cone 1 are respectively located on any two different surfaces of the frame 3 except the bottom surface, and the sampling end of the propellant sampler 16 and the sampling end of the mass spectrometry sampling cone 1 both correspond to the center heating area on the electromagnetic induction heating coil 18.

[0028] Two first mounting plates 10 are overlapped and mounted on the surface of the frame 3 on which the propellant sampler 16 is mounted, and sealing holes 23 are arranged on the same positions of the two first mounting plates 10. The opposite inner sides of the two first mounting plates 10 form annular sealing grooves 20 outside the sealing holes 23, sealing plates 17 are installed in the sealing grooves 20, and the propellant sampler 16 penetrates through the sealing plates 17 and is fixed. The mass spectrometer butt flange 4 is installed on the surface of the frame 3 corresponding to the mass spectrometry sampling cone 1, the frame 3 is sealed and mounted on the mass spectrometry detection equipment through the mass spectrometer butt flange 4, and the mass spectrometry sampling cone 1 is connected with the mass spectrometry detection equipment.

[0029] Two second mounting plates 8 are mounted on the rest of the faces of the frame 3, glass mounting holes 21 are arranged on the same positions of the two second mounting plates 8, and mounting grooves 22 in annular shape are formed on the opposite inner sides of the two second mounting plates 8 outside the glass mounting holes 21, and the optical glass 9 is mounted in the mounting grooves 22, the optical glass 9 is at least one selected from high-transparency quartz glass, infrared light-transmitting glass, ultraviolet light-transmitting glass, and laser light-transmitting glass.

[0030] Two third mounting plates 24 are mounted on the faces of the frame 3 where the electric input end and the electric output end of the electromagnetic induction heating coil 18 are fixed, coil mounting holes 25 are arranged on the same positions of the two third mounting plates 24, and coil mounting grooves 26 in annular shape are formed on the opposite inner sides of the two third mounting plates 24 outside the coil mounting holes 25, and the coil sealing mounting plate 27 is mounted in the coil mounting grooves 26, and the electric input end and the electric output end of the electromagnetic induction heating coil 18 are respectively penetrated through the coil sealing mounting plate 27 and fixed.

[0031] The lower end of the reaction platform cylinder 12 is mounted with a locking nut 13.

[0032] As shown in the embodiment one, Figures 1-2 the mass spectrum sampling cone 1 is located on the top face of the frame 3, the propellant sampler 16 is located on the side face of the frame 3, and the optical glass 9 includes two high-transparency quartz glasses and one infrared light-transmitting glass, which are respectively mounted on the rest of the faces of the frame 3, the infrared thermal imager is used to monitor the temperature of the reaction zone through the infrared light-transmitting glass, and the high-speed camera is used to record the image of the reaction process through the high-transparency quartz glasses.

[0033] In use, the gas of the target atmosphere is introduced into the reaction cavity 2 through the gas inlet pipe 6 and the gas outlet pipe 7, the pressure inside the reaction cavity 2 is controlled to reach the target pressure, the electromagnetic induction heating coil 18 is powered on, the electromagnetic induction high-temperature heat accumulator 11 is quickly heated to the target temperature through the electromagnetic induction heating coil 18, before the temperature of the reaction cavity is still at the propellant phase change temperature, the propellant is introduced into the high-temperature micro-reaction zone in liquid or mist state through the propellant sampler 16, the rapid high-temperature decomposition or combustion reaction of the propellant occurs, and the mass spectrum sampling cone 1 extending into the reaction micro-zone is used to sample and detect the intermediate products of the propellant reaction on line.

[0034] As shown in the embodiment two, Figures 3-4 the mass spectrum sampling cone 1 is located on the side face of the frame 3, and the propellant sampler 16 is located on the top face of the frame 3.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid propellant electromagnetic induction heating device for mass spectrometric on-line sampling and detection, characterized in that, The frame (3) is provided with a reaction cavity (2), the reaction bench cylinder (12) vertically penetrates the bottom surface of the frame (3), the propellant sampler (16) and the mass spectrometer sampling cone (1) are respectively arranged on any two different surfaces of the frame (3) except the bottom surface, the electromagnetic induction heating coil (18) is arranged on the upper surface of the reaction bench cylinder (12), the sampling end of the propellant sampler (16) and the sampling end of the mass spectrometer sampling cone (1) correspond to the central heating area of the electromagnetic induction heating coil (18), and the electric input end and the electric output end of the electromagnetic induction heating coil (18) respectively penetrate the same side surface of the frame (3) and are fixed.

2. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The reaction bench cylinder (12) is installed on the bottom surface of the frame (3) through the reaction bench butt flange (5), and the gas inlet pipe (6) and the gas outlet pipe (7) which are in communication with the reaction cavity (2) are respectively arranged on the side wall of the reaction bench butt flange (5).

3. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 2, characterized in that, The sealing locking gasket (14) is arranged between the reaction bench butt flange (5) and the reaction bench cylinder (12), the reaction bench locking flange (15) is threadedly installed below the sealing locking gasket (14) on the reaction bench cylinder (12), and the upper end of the reaction bench locking flange (15) abuts against the lower end of the sealing locking gasket (14).

4. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The high-temperature-resistant insulator (19) is arranged on the upper end of the reaction bench cylinder (12), the electromagnetic induction heating coil (18) is arranged on the upper surface of the high-temperature-resistant insulator (19), and the electromagnetic induction heat accumulator (11) is arranged on the high-temperature-resistant insulator (19) corresponding to the central heating area of the electromagnetic induction heating coil (18).

5. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The two third mounting plates (24) are arranged on the surface of the frame (3) for fixing the electric input end and the electric output end of the electromagnetic induction heating coil (18), the coil mounting holes (25) are arranged on the same positions of the two third mounting plates (24), the annular coil mounting grooves (26) are formed on the opposite inner sides of the two third mounting plates (24) outside the coil mounting holes (25), the coil sealing mounting plate (27) is arranged in the coil mounting groove (26), and the electric input end and the electric output end of the electromagnetic induction heating coil (18) respectively penetrate the coil sealing mounting plate (27) and are fixed.

6. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The two first mounting plates (10) are arranged on the surface of the frame (3) for mounting the propellant sampler (16), the sealing holes (23) are arranged on the same positions of the two first mounting plates (10), the annular sealing grooves (20) are formed on the opposite inner sides of the two first mounting plates (10) outside the sealing holes (23), the sealing plate (17) is arranged in the sealing groove (20), and the propellant sampler (16) penetrates the sealing plate (17) and is fixed.

7. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The mass spectrometer butt flange (4) is arranged on the surface of the frame (3) corresponding to the mass spectrometer sampling cone (1), the frame (3) is sealingly mounted on the mass spectrometer detection equipment through the mass spectrometer butt flange (4), and the mass spectrometer sampling cone (1) is connected with the mass spectrometer detection equipment.

8. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, Two second mounting plates (8) are mounted on the remaining surface of the frame (3) in superposition, glass mounting holes (21) are arranged on the same positions of the two second mounting plates (8), and annular mounting grooves (22) are formed on the opposite inner sides of the two second mounting plates (8) outside the glass mounting holes (21), and the optical glass (9) is mounted in the mounting grooves (22).

9. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 1, characterized in that, The optical glass (9) is at least one selected from high-transparency quartz glass, infrared light-transmitting glass, ultraviolet light-transmitting glass and laser light-transmitting glass.

10. The electromagnetic induction heating device for liquid propellant of mass spectrometry on-line sampling and detection according to claim 4, characterized in that, The vertical distance between the electromagnetic induction heat accumulator (11) and the reaction table cylinder (12) is at least 2 times the thickness of the electromagnetic induction heating coil (18).

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