Material ablation resistance test flame gun, test device and test method

Abstract

The invention relates to a flame gun, a device and a method for testing ablation resistance of a material. The flame gun comprises a main body (11); the inner spraying pipe (12) is used for spraying flame; the outer spraying pipe (13) is used for forming a cooling gas spraying gap with the inner spraying pipe (12); a sand blasting pipe (14) for blasting compressed gas mixed with particles; the inner spray pipe (12) and the outer spray pipe (13) are both connected with the main body (11), the inner spray pipe (12) is arranged on the inner side of the outer spray pipe (13), and the sand blasting pipe (14) is arranged in the center of the inner spray pipe (12). Compared with the prior art, the device can simulate granular jet flames generated during thermal runaway combustion of the battery, and can cool the flames to obtain flames or hot air in a low-temperature interval of 500-800 DEG C.

Description

Technical Field

[0001] The invention relates to the technical field of material ablation resistance testing, and in particular to a material ablation resistance testing flame gun, a testing device and a testing method. Background Art

[0002] With the rapid development of electric vehicles and other fields, battery safety has become the focus of attention. Preventing battery fire failure is a key link in ensuring the safety of battery systems. New plastics need to be able to withstand high temperatures and not burn through jet flames above 1000°C, achieve a higher level of flame resistance, and effectively prevent the spread of fire. In the electronic control system for batteries and home appliances, new plastics can directly replace mica boards or other thermosetting resin materials, which can improve the fire resistance of batteries and reduce costs.

[0003] In the process of R&D and production of new plastics, a special equipment is needed to simulate the thermal runaway environment encountered by the material in actual application, that is, to test the temperature resistance and burning resistance of the material. The test results can help material R&D to screen the formula and process.

[0004] At present, the ablation resistance test in this field basically adopts the hand-held flame gun purchased on the market. The flame gun uses a cassette furnace gas tank. This type of flame gun adjusts the air door to change the flame temperature between 1100-1300 degrees. There is no way to simulate the granular jet flame generated by the thermal runaway combustion of the battery, nor can the flame be cooled to obtain a flame or hot air in the low temperature range of 500-800 degrees to detect the relevant performance of the sample in this temperature range. For example, some formulas can be sintered and hardened at high temperatures, but the sample softens in the low temperature range and cannot form a sintered hardening layer.

[0005] Invention patent CN 117949490 A discloses a thermal runaway protection performance test device and test method for refractory materials for battery packs, which simultaneously sprays flames and pressurized air toward the sample to simulate the effects of high temperature, flames, and particle spraying caused by thermal runaway of actual battery cells. However, the air spray module and the flame spray module of the device are separately arranged, and the angle α between the spray direction of the pressurized air and the spray direction of the flame is between 30° and 60°. However, in the actual thermal runaway combustion phenomenon of the battery pack, the spray flame and particles of the battery cell are mostly sprayed from the same position, and the device still has limitations in simulating the flame state of the battery cell when it burns. Summary of the invention

[0006] The purpose of the present invention is to provide a material ablation resistance test flame gun, a test device and a test method to better simulate the flame state of a battery cell when it burns.

[0007] The purpose of the present invention can be achieved by the following technical solution: A flame gun for testing material ablation resistance, comprising:

[0008] main body;

[0009] An internal nozzle for ejecting flames;

[0010] An outer nozzle used to form a cooling gas ejection gap with the inner nozzle;

[0011] A blasting hose for spraying compressed gas mixed with particles;

[0012] The inner nozzle and the outer nozzle are both connected to the main body, and the inner nozzle is arranged on the inner side of the outer nozzle, and the sandblasting tube is arranged at the center of the inner nozzle.

[0013] Preferably, a gas channel and a combustion-supporting gas channel are provided in the main body, and the gas connecting pipe and the combustion-supporting gas connecting pipe are connected respectively through the gas channel and the combustion-supporting gas channel, and the gas channel and the combustion-supporting gas channel are connected with the inner nozzle.

[0014] Further preferably, a mixing tube is provided in the main body, the inlet end of the mixing tube is connected to the gas channel, the outlet end is connected to the inner nozzle via the first partition, and multiple holes for the introduction of supporting combustion gas are opened on the circumference of the mixing tube, and the supporting combustion gas channel is connected to the mixing tube through the multiple holes.

[0015] More preferably, the inner nozzle comprises an annular inner tube and an air guide tube, a second partition plate, a mesh plate and a porous plate arranged in the annular inner tube;

[0016] The outlet end of the mixing tube is connected to a porous plate for spraying flames through the first partition, the air guide pipe, the second partition and the mesh plate in sequence. An ignition needle for ignition and a thermocouple for detecting flame temperature are arranged at the porous plate.

[0017] Preferably, a high-voltage ignition mounting hole and a thermocouple circuit mounting hole are provided on the main body, and through holes are provided on the first partition plate, the second partition plate, the mesh plate and the porous plate. The ignition needle passes through the high-voltage ignition mounting hole and the through hole, penetrates the flame gun and extends out of the porous plate, and the thermocouple passes through the thermocouple circuit mounting hole and the through hole, penetrates the flame gun and extends out of the porous plate.

[0018] Preferably, a cooling gas channel is provided in the main body, and a cooling gas connecting pipe is connected via the cooling gas channel, and the cooling gas channel is communicated with the cooling gas ejection gap.

[0019] Further preferably, the cooling air channel outlet ends are distributed circumferentially;

[0020] The outer nozzle comprises an annular outer tube having the same shape as the inner nozzle but larger in size than the inner nozzle, a cooling gas ejection gap is formed between the annular outer tube and the inner nozzle, and a coaxial gasket in the shape of an annular tooth is arranged in the cooling gas ejection gap.

[0021] Preferably, the diameters of the annular inner tube and the annular outer tube are smaller at the sides close to the sample than at the sides far from the sample.

[0022] Further preferably, the annular inner tube and the annular outer tube are in a trumpet shape with increasing diameters on the side away from the sample.

[0023] Preferably, a jet channel is provided in the main body, and the jet pipeline is connected via the jet channel, and the jet channel is communicated with the sandblasting tube.

[0024] A material ablation resistance testing device comprises the flame gun.

[0025] Preferably, the material ablation resistance testing device further comprises a sample clamp for clamping the sample, a clamp adjustment mechanism for adjusting the position of the sample clamp, a flame gun adjustment mechanism for adjusting the position of the flame gun, and a flame baffle mechanism for achieving isolation and ablation between the sample and the flame gun.

[0026] A material ablation resistance test method is carried out using the above-mentioned test device, comprising the following steps: clamping the sample by a sample fixture, and adjusting the relative position of the sample and the flame gun by a fixture adjustment mechanism and a flame gun adjustment mechanism, isolating the sample from the flame gun by a fire baffle mechanism before the test, and adjusting the fire baffle mechanism during the test so that the flame gun ablates the sample.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. A particle injection pipe is arranged at the center of the flame gun of the present invention, which can simulate the particle injection flame when the battery is under thermal runaway.

[0029] 2. The present invention sets the sandblasting tube at the center of the flame gun to spray compressed gas mixed with particulate matter, which better simulates the flame state of the battery core during combustion and the application environment of related materials.

[0030] 3. The flame gun of the present invention integrates the functions of compressed gas and particle injection. The compressed gas and particle injection are in the same direction as the ablation flame, which can simulate the phenomenon of battery core injection flame.

[0031] 4. In the actual thermal runaway combustion phenomenon of the battery pack, the jet flame and particles of the battery cell are ejected from the same position. The present invention sets the flame and pressurized jet direction to be perpendicular to the sample test surface, which can simulate the relevant performance of the battery pack material under the most severe ablation environment.

[0032] 5. The present invention can cool the flame so that the sample test temperature can be adjusted between 500 and 1300 degrees.

[0033] 6. The present invention has a flame cooling function and can adjust the flame combustion ratio and cooling gas flow rate through an electronically controlled flow meter to obtain the required test temperature.

[0034] 7. The present invention can control the test temperature of the sample surface by adjusting the test distance, and adjust the impact strength of the flame and the jet of compressed gas and particles on the sample.

[0035] 8. The present invention can realize high and low temperature cycle ablation and jet cycle ablation functions.

[0036] 9. The present invention provides a flame gun for material ablation resistance testing, which can simulate the granular jet flame produced by thermal runaway combustion of a battery, and can also cool the flame to obtain a flame or hot air in the low temperature range of 500-800 degrees, which can be used for ablation resistance testing of new plastics related to new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the flame gun of the present invention and the related pipelines connected thereto;

[0038] Figure 2 It is a rear view of the flame gun of the present invention;

[0039] Figure 3 for Figure 2 GG profile;

[0040] Figure 4 It is a side view of the flame gun of the present invention;

[0041] Figure 5 for Figure 4 II section view;

[0042] Figure 6 An exploded view of the flame gun of the present invention;

[0043] Figure 7 It is a structural schematic diagram of the testing device of the present invention;

[0044] Figure 8 This is a working photo of the flame gun of the present invention;

[0045] Fig. 9 It is a working principle diagram of the pipeline related to the present invention;

[0046] In the figure: 1-flame gun, 11-main body, 12-inner nozzle, 121-air guide pipe, 122-second baffle, 123-mesh plate, 124-porous plate, 13-outer nozzle, 14-sandblasting tube, 15-mixing tube, 16-first baffle, 17-ignition needle, 18-thermocouple, 19-coaxial gasket, 21-gas connecting pipe, 22-combustion-supporting gas connecting pipe, 23-cooling gas connecting pipe, 24-injection pipeline, 25-thermocouple connecting wire, 26-high-voltage ignition wire, 27-intake pipe pressure plate, 28-annular sealing plate, 29-pressure plate, 210-connecting seat, 3-sample fixture, 4-fixture adjustment mechanism, 5-flame gun adjustment mechanism, 6-fire baffle mechanism, 7-sample. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0049] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0050] Example 1

[0051] A flame gun for testing material ablation resistance comprises a main body 11, an inner nozzle 12, an outer nozzle 13 and a sandblasting tube 14.

[0052] Among them, the inner nozzle 12 is connected to the main body 11 and is used to spray flames. The outer nozzle 13 is arranged on the outside of the inner nozzle 12 and connected to the main body 11. It can cooperate with the inner nozzle 12 to form a cooling gas ejection gap. A sandblasting tube 14 is provided at the center of the inner nozzle 12 for spraying compressed gas mixed with particles.

[0053] The flame gun of this embodiment can cool the flame by means of cooling gas and spray particles from the center of the flame.

[0054] Example 2

[0055] A material ablation resistance test flame gun, such as Figures 1 to 6 As shown, it includes a main body 11, an inner nozzle 12, an outer nozzle 13 and a sandblasting tube 14.

[0056] Among them, the main body 11 is provided with a gas channel, a combustion-supporting gas channel, a cooling gas channel and an injection channel. The gas channel is connected to the gas connecting pipe 21, the combustion-supporting gas channel is connected to the combustion-supporting gas connecting pipe 22, the cooling gas channel is connected to the cooling gas connecting pipe 23, and the injection channel is connected to the injection pipe 24.

[0057] In addition, the main body 11 is also provided with a high-voltage ignition installation hole, a thermocouple circuit installation hole and a mixing tube 15. The inner nozzle 12 includes an annular inner tube and an air guide tube 121, a second partition plate 122, a mesh plate 123 and a porous plate 124 arranged in the annular inner tube. The outer nozzle 13 includes an annular outer tube sleeved on the outside of the annular inner tube, which has the same shape as the annular inner tube but is larger in size than the annular inner tube. The annular inner tube and the annular outer tube are both connected to the main body 11, and a cooling gas ejection gap is formed between the annular outer tube and the annular inner tube.

[0058] Specifically, the inlet end of the mixing tube 15 is connected to the gas channel, and the outlet end is connected to the porous plate 124 through the first partition 16, the gas guide pipe 121, the second partition 122, and the mesh plate 123 in sequence. The circumference of the mixing tube 15 is provided with multiple holes for the introduction of the combustion-supporting gas, and the combustion-supporting gas channel is connected to the mixing tube 15 through the multiple holes. Through this arrangement, the combustion-supporting gas enters through the multiple holes on the circumference of the mixing tube 15 and mixes with the gas in the mixing tube 15. The mixed gas is ejected and burned from the porous plate 124 through the first partition 16, the gas guide pipe 121, the second partition 122, and the mesh plate 123 in sequence, thereby realizing the ejection of the flame of the inner nozzle 12. The porous plate 124 is provided with an ignition needle 17 and a thermocouple 18, which can be used for ignition and detection of flame temperature, respectively. In this embodiment, the first partition plate 16, the second partition plate 122, the mesh plate 123 and the porous plate 124 are all provided with through holes for avoidance. The ignition needle 17 passes through the high-voltage ignition mounting hole and the through hole to penetrate the flame gun and is connected to the high-voltage ignition wire 26. The thermocouple 18 passes through the thermocouple line mounting hole and the through hole to penetrate the flame gun and is connected to the thermocouple connecting wire 25.

[0059] The outlet end of the cooling gas channel in the main body 11 is a circumferentially distributed channel, and a coaxial gasket 19 in a ring tooth shape is provided in the cooling gas ejection gap. The cooling gas enters the cooling gas ejection gap through the circumferentially distributed channel and is further evenly dispersed by the coaxial gasket 19.

[0060] The injection channel in the main body 11 is arranged at the center of the main body 11, one end of which is connected to the sandblasting tube 14, and the other end is connected to the injection pipeline 24. The sandblasting tube 14 passes through the center of the porous plate 124 to inject compressed gas mixed with particles.

[0061] The working principle of the flame gun for the ablation resistance test of the material in this embodiment is:

[0062] The fuel gas is input into the fuel gas channel through the fuel gas connecting pipe 21 and enters the mixing tube 15 through the fuel gas channel. The supporting combustion gas is input into the supporting combustion gas channel through the supporting combustion gas connecting pipe 22 and enters the mixing tube 15 through the supporting combustion gas channel and the multiple holes on the wall of the mixing tube 15. The fuel gas and supporting combustion gas are mixed in the mixing tube 15 and then transported to the inner nozzle 12 to provide a gas source for the inner nozzle 12 to spray the flame.

[0063] The compressed gas mixed with particles is input into the injection channel through the injection pipe 24 and is ejected from the flame center of the inner nozzle 12 through the sandblasting tube 14 .

[0064] When the flame needs to be cooled, the cooling gas is input into the cooling gas channel through the cooling gas connecting pipe 23, and is ejected through the cooling gas ejection gap to cool the flame.

[0065] Example 3

[0066] A flame gun for testing material ablation resistance, wherein the flame gun body 11 is designed with 4 gas channels inside, including: a gas channel, a combustion-supporting gas channel, a cooling gas channel, and an injection channel, and is also designed with two mounting holes, including: a high-voltage ignition mounting hole and a thermocouple circuit mounting hole. The gas channel, the combustion-supporting gas channel, and the cooling gas channel are connected to the external pipeline through 3 sets of identical connecting components. The connecting component consists of an air intake pipe and an air intake pipe pressure plate 27, and an O-ring is provided at the connection between the air intake pipe and the flame gun body 11, and the injection channel is located at the center of the flame gun body 11.

[0067] The first baffle 16 and the mixing tube 15 are installed and connected with the flame gun body 11, and a sealing ring is provided at the connection. The combustion-supporting gas enters through the holes on the circumference of the mixing tube 15 and mixes with the gas in the tube, and then is ejected and burned through the air guide tube 121, the second baffle 122, the mesh plate 123, and the porous plate 124. The air guide tube 121, the second baffle 122, the mesh plate 123, and the porous plate 124 are installed in the inner nozzle 12. The second baffle 122 and the mesh plate 123 disperse the mixed gas ejected from the air guide tube 121 into the porous plate 124, and the porous plate 124 makes the flame uniform.

[0068] The inner nozzle 12 and the outer nozzle 13 are threadedly connected to the flame gun body 11, and a sealing ring is provided at the connection. The coaxial gasket 19 is in the shape of a ring tooth, which is used to make the annular gap between the outer nozzle 13 and the inner nozzle 12 uniform. The cooling air channel of the flame gun body 11 flows into the gap between the inner and outer nozzles through the circumferentially distributed channels, and is ejected at the flame gun nozzle, surrounding the injection flame in an annular shape, which serves the purpose of cooling the flame. The annular sealing plate 28 is installed with the flame gun body 11 and is provided with a sealing ring, which is used to close the circumferential annular channel of the cooling air at the rear end of the flame gun body 11.

[0069] The ignition needle 17, thermocouple 18, and sandblasting tube 14 are installed, passing through the front and rear ends of the flame gun, and are fixed by a pressure plate 29 and a sealing ring, and the pressure plate 29 also fixes the annular sealing plate 28. The high-voltage arc of the ignition needle 17 ignites the mixed gas, the thermocouple 18 detects the flame temperature at the nozzle, the equipment determines whether the flame is ignited or extinguished according to the set program, and the sandblasting tube 14 sprays compressed gas mixed with particles.

[0070] Example 4

[0071] A material ablation resistance testing device, such as Figure 7 As shown, it includes a flame gun 1 having the structure of embodiment 2, a sample fixture 3, a fixture adjustment mechanism 4, a flame gun adjustment mechanism 5 and a fire baffle mechanism 6.

[0072] The sample fixture 3 holds the test sample 7 and is connected to a fixture adjustment mechanism 4 that can adjust the position of the sample fixture 3. The flame gun 1 is installed on the column through a connecting seat 210 and is connected to a flame gun adjustment mechanism 5 for adjusting its position. The sample ablation position can be adjusted by the coordination of the fixture adjustment mechanism 4 and the flame gun adjustment mechanism 5. A fire baffle mechanism 6 is provided between the sample 7 and the flame gun 1, including a fire baffle and a baffle cylinder for driving the fire baffle to be raised or lowered. When the fire baffle of the fire baffle mechanism 6 is lowered, the sample 7 can be isolated from the flame gun 1 (such as Figure 8 ), when the fire baffle is lifted, the flame gun 1 can ablate the sample 7.

[0073] Example 5

[0074] A material ablation resistance testing device, such as Fig. 9 As shown, the auxiliary combustion gas enters the flame gun through the auxiliary combustion gas electronic flow meter, the gas enters the flame gun through the gas solenoid valve and the gas electronic flow meter, the cooling gas enters the flame gun through the cooling solenoid valve and the cooling flow regulating valve, and the compressed air is divided into two paths, one path passes through the injection solenoid valve and the pressure regulating valve to mix with the injection particles and then enters the flame gun, and the other path passes through the baffle solenoid valve and enters the baffle cylinder.

[0075] In this embodiment, the cooling gas is carbon dioxide, and the sprayed particles are aluminum oxide particles with a particle size of 0.1-0.2 mm.

[0076] In addition, in this embodiment, the test device further includes a control mechanism, which can control the opening and closing and flow rate of each solenoid valve, and can realize automatic control of the ablation resistance test. The control mechanism may include a PLC controller. The test device is set in a test box and is provided with a gas leak detection device. The rest is the same as Example 4.

[0077] This embodiment integrates the functions of jet flame, flame cooling, compressed gas and particle injection, high-pressure ignition, and flameout detection. The pipelines related to each function are connected to the control device to realize flame power, flame temperature, ignition, and cut off the relevant gas passages after determining flameout to ensure test safety. This embodiment is provided with a flame cooling gas channel, which can obtain a lower flame temperature or hot air by controlling the cooling gas flow rate, while maintaining the test distance between the flame gun and the sample. The cooling gas enters the flame gun body through the flow control device, passes through the internal designed channel, and is ejected from the circumferentially distributed channels on the sample side, and then ejected through the circumferential gap between the inner and outer nozzles to surround the flame. The cooling airflow takes away the heat of the flame to achieve the purpose of cooling. A coaxial gasket is also provided between the inner and outer nozzles to ensure the uniformity of the circumferential gap between the inner and outer nozzles.

[0078] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A flame gun for testing material ablation resistance, characterized in that: include: Subject (11); An inner nozzle (12) for spraying flame; An outer nozzle (13) for forming a cooling gas ejection gap with the inner nozzle (12); A sandblasting tube (14) for spraying compressed gas mixed with particles; The inner nozzle (12) and the outer nozzle (13) are both connected to the main body (11), and the inner nozzle (12) is arranged inside the outer nozzle (13), and the sandblasting pipe (14) is arranged at the center of the inner nozzle (12).

2. The material ablation resistance test flame gun according to claim 1, characterized in that: The main body (1) is provided with a gas channel and a combustion-supporting gas channel, and the gas channel and the combustion-supporting gas channel are respectively connected to a gas connecting pipe (21) and a combustion-supporting gas connecting pipe (22), and the gas channel and the combustion-supporting gas channel are in communication with the inner nozzle (12).

3. The material ablation resistance test flame gun according to claim 2, characterized in that: A mixing tube (15) is arranged in the main body (11), the inlet end of the mixing tube (15) is connected to the gas channel, and the outlet end is connected to the inner nozzle (12) through the first partition plate (16). Multiple holes for the introduction of auxiliary combustion gas are opened on the circumference of the mixing tube (15), and the auxiliary combustion gas channel is connected to the mixing tube (15) through the multiple holes.

4. The material ablation resistance test flame gun according to claim 3, characterized in that: The inner nozzle (12) comprises an annular inner tube, an air guide tube (121) arranged inside the annular inner tube, a second partition plate (122), a mesh plate (123) and a porous plate (124); The outlet end of the mixing tube (15) is connected to a porous plate (124) for spraying flames through a first baffle (16), an air guide tube (121), a second baffle (122), and a mesh plate (123) in sequence. An ignition needle (17) for ignition and a thermocouple (18) for detecting flame temperature are provided at the porous plate (124).

5. The material ablation resistance test flame gun according to claim 4, characterized in that: The main body (11) is provided with a high-voltage ignition installation hole and a thermocouple circuit installation hole, and the first partition plate (16), the second partition plate (122), the mesh plate (123) and the porous plate (124) are all provided with through holes. The ignition needle (17) passes through the high-voltage ignition installation hole and the through hole, penetrates the flame gun and extends out of the porous plate (124), and the thermocouple (18) passes through the thermocouple circuit installation hole and the through hole, penetrates the flame gun and extends out of the porous plate (124).

6. The material ablation resistance test flame gun according to claim 1, characterized in that: A cooling gas channel is provided in the main body (11), and is connected to a cooling gas connecting pipe (23) via the cooling gas channel. The cooling gas channel is in communication with the cooling gas ejection gap.

7. The material ablation resistance test flame gun according to claim 6, characterized in that: The outlet ends of the cooling air channels are distributed in a circular pattern; The outer nozzle (13) comprises an annular outer tube having the same shape as the inner nozzle (12) but a larger size than the inner nozzle (12), a cooling gas ejection gap is formed between the annular outer tube and the inner nozzle (12), and a coaxial gasket (19) in the shape of a ring tooth is provided in the cooling gas ejection gap.

8. The material ablation resistance test flame gun according to claim 1, characterized in that: The main body (11) is provided with a jet channel, and is connected to a jet pipeline (24) via the jet channel, and the jet channel is communicated with a sandblasting tube (14).

9. A material ablation resistance testing device, characterized in that: The flame gun comprises the flame gun as claimed in any one of claims 1 to 8, and further comprises a sample clamp (3) for clamping a sample, a clamp adjustment mechanism (4) for adjusting the position of the sample clamp (3), a flame gun adjustment mechanism (5) for adjusting the position of the flame gun, and a flame baffle mechanism (6) for achieving isolation and ablation between the sample and the flame gun.

10. A method for testing material ablation resistance, characterized in that: The test device according to claim 9 is used for the test, comprising the following steps: clamping the sample by a sample clamp (3), and adjusting the relative position of the sample and the flame gun by a clamp adjustment mechanism (4) and a flame gun adjustment mechanism (5); isolating the sample from the flame gun by a fire baffle mechanism (6) before the test, and adjusting the fire baffle mechanism (6) during the test so that the flame gun ablates the sample.

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