Combustion testing machine

Abstract

The utility model discloses a combustion testing machine. The combustion testing machine comprises a case, a smoke exhaust hood, a pattern mechanism and a blowtorch mechanism, the exhaust hood is detachably arranged at the top of the case; the sample mechanism is arranged in the case and comprises a vertical adjusting assembly and a clamping assembly, the clamping assembly is connected to the output end of the vertical adjusting assembly and can be driven by the vertical adjusting assembly to ascend and descend, and the clamping assembly is used for clamping a sample; the blowtorch mechanism is arranged in the machine box and comprises a first adjusting assembly, a second adjusting assembly and a blowtorch, the second adjusting assembly is arranged at the output end of the first adjusting assembly and can move in the first direction under driving of the first adjusting assembly, and the blowtorch is arranged at the output end of the second adjusting assembly and can move in the second direction under driving of the second adjusting assembly. The first adjusting assembly can move in the second direction under driving of the second adjusting assembly, and the first direction and the second direction are both in the horizontal direction and are perpendicular to each other. According to the combustion testing machine, the accuracy of a test result can be improved, and the service life of the testing machine can be prolonged.

Description

Technical Field

[0001] This application relates to the technical field of combustion test, and particularly to a combustion testing machine. Background Art

[0002] In related technologies, the horizontal and vertical burning tester is developed according to the standard GB-T2408-2008, fully meeting the technical requirements specified in the national standard GB / T2408. It can be used to conduct tests on plastic horizontal combustion and vertical combustion methods on the same instrument in cooperation with a dedicated sample holder. However, when testing samples with existing equipment, since some samples will be deformed by the combustion flame and the deformation direction is not fixed, the existing equipment cannot adjust the position of the sample or the position of the flame during the test, resulting in the sample not contacting the flame after deformation and affecting the test results. In addition, since most of the exhaust hoods are fixed on the top of the combustion testing machine, after being used for a period of time, dust accumulates in the exhaust hood, greatly shortening the service life of the testing machine. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a combustion testing machine, which can not only improve the accuracy of test results but also extend the service life of the testing machine.

[0004] The combustion testing machine according to an embodiment of the utility model includes: a chassis, an exhaust hood, a sample mechanism, and a burner mechanism; the exhaust hood is detachably arranged on the top of the chassis; the sample mechanism is arranged inside the chassis and includes a vertical adjustment component and a clamping component. The clamping component is connected to the output end of the vertical adjustment component and can be lifted and lowered under the drive of the vertical adjustment component. The clamping component is used for clamping the sample; the burner mechanism is arranged inside the chassis and includes a first adjustment component, a second adjustment component, and a burner. The second adjustment component is arranged at the output end of the first adjustment component and can move along a first direction under the drive of the first adjustment component. The burner is arranged at the output end of the second adjustment component and can move along a second direction under the drive of the second adjustment component. The first direction and the second direction are both horizontal and perpendicular to each other.

[0005] The combustion test machine according to the embodiment of the utility model has at least the following beneficial effects: the combustion test machine includes a machine box, a smoke exhaust hood, a sample mechanism and a blowtorch mechanism; the smoke exhaust hood is detachably arranged on the top of the machine box and is used to exhaust the smoke from combustion. Due to the detachable structure of the smoke exhaust hood, the smoke exhaust hood can be disassembled and cleaned after a period of use, thereby avoiding blockage caused by dust accumulation, thereby greatly extending the service life of the test machine; the sample mechanism and the blowtorch mechanism are both arranged in the machine box and are used to set the sample and the blowtorch respectively, wherein the sample mechanism includes a clamping assembly for clamping the sample and a vertical adjustment assembly for adjusting the height of the clamping assembly, thereby enabling the adjustment of the sample height, and the blowtorch mechanism includes a blowtorch capable of burning, a second adjustment assembly and The first adjusting component and the blowtorch are arranged on the second adjusting component and can move horizontally along the second direction under the drive of the second adjusting component. The second adjusting component is arranged on the first adjusting mechanism and can move horizontally along the first direction under the drive of the first adjusting mechanism. The first direction and the second direction are perpendicular, so the horizontal position of the blowtorch can be adjusted. In this way, the vertical position of the sample is adjusted by the sample mechanism, and the horizontal position of the blowtorch is adjusted by the blowtorch mechanism, so that the blowtorch flame can always be aimed at the deformed sample after combustion. Therefore, the sample can always be burned by the flame of the blowtorch during the combustion process, thereby greatly improving the accuracy of the test results. In summary, the combustion testing machine of the present application can not only improve the accuracy of the test results, but also extend the service life of the testing machine.

[0006] According to some embodiments of the utility model, a locking mechanism is also included. The locking mechanism is arranged on the top of the chassis and includes a fourth drive component and a locking component. The output end of the fourth drive component is connected to the locking component and can drive the locking component to lock or release the smoke exhaust hood.

[0007] According to some embodiments of the utility model, a limit frame is fixedly provided at the bottom of the smoke exhaust hood, and the outer edge of the limit frame protrudes from the outer edge of the smoke exhaust hood. An avoidance position is formed at the bottom of the locking end of the locking assembly. The locking end of the locking assembly can be translated to above the outer edge of the limit frame under the drive of the fourth group of driving components to limit the top of the limit frame.

[0008] According to some embodiments of the present invention, the fourth driving assembly includes an elastic member, which connects the top of the chassis and the locking assembly and is used to provide an elastic force for the locking assembly to lock the smoke exhaust hood.

[0009] According to some embodiments of the utility model, the fourth drive assembly also includes a rotating assembly and a linkage assembly. The rotating assembly is rotatably connected to the top of the chassis, one end of the linkage assembly is hinged to the outer periphery of the rotating assembly, and the other end is hinged to the side of the locking assembly away from the elastic member. The linkage assembly can drive the locking assembly to move toward the side close to the elastic member under the rotation of the rotating assembly.

[0010] According to some embodiments of the present utility model, the locking mechanism further includes a receiving box, the receiving box is fixedly arranged on the top of the chassis, the elastic member is arranged in the receiving box, and one end of the elastic member is connected to the inner side wall of the receiving box.

[0011] According to some embodiments of the present utility model, it further includes a control system, and the control system is electrically connected to the sample mechanism and the blowtorch mechanism respectively, so as to respectively control the driving of the vertical adjustment assembly, the first adjustment assembly and the second adjustment assembly, so as to control the movement and reset of the clamping assembly and the blowtorch.

[0012] According to some embodiments of the present utility model, the blowtorch mechanism further includes a blowtorch bracket, the blowtorch bracket is arranged on the second adjustment assembly and is used for arranging the blowtorch, and an angle adjustment structure is arranged between the blowtorch bracket and the blowtorch, so as to adjust the inclination angle of the blowtorch.

[0013] According to some embodiments of the present utility model, the angle adjustment structure includes a clamping portion arranged on the blowtorch and a guiding groove arranged on the blowtorch bracket, the blowtorch bracket is provided with clamping grooves with different heights, the clamping grooves communicate with the lower part of the guiding groove, and the clamping portion can slide along the guiding groove and be clamped in the clamping groove.

[0014] According to some embodiments of the present utility model, the guiding groove is sequentially connected by waist-shaped holes with gradually increasing slopes.

[0015] Some additional aspects and advantages of the present application will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0016] The following will further describe the present utility model in conjunction with the drawings and embodiments, where:

[0017] Figure 1 is a schematic diagram of the overall structure of one embodiment of the combustion test machine of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the structure of the sample mechanism and the blowtorch mechanism in the combustion test machine shown in ;

[0019] Figure 3 is Figure 1 a partial enlarged view of part A shown in ;

[0020] Figure 4 is Figure 1 a partial enlarged sectional view of the top of the combustion test machine shown in ;

[0021] Figure 5 is Figure 2 a partial enlarged view of part B shown in ;

[0022] Figure 6 is Figure 1 a schematic structural view of a rotating assembly in the combustion test machine shown in

[0023] Reference numerals:

[0024] chassis 100; exhaust hood 200; limit frame 210; specimen mechanism 300; vertical adjustment assembly 310; clamping assembly 320; blowtorch mechanism 400; first adjustment assembly 410; second adjustment assembly 420; blowtorch 430; clamping portion 431; blowtorch bracket 440; guide groove 441; waist-shaped hole 4411; card slot 442; locking mechanism 500; elastic member 510; rotating assembly 520; cylinder 521; upper flange 522; lower flange 523; linkage assembly 530; articulated rod 531; connecting rod 532; locking assembly 540; receiving box 550; guide rod 560. Detailed implementation manners

[0025] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0026] In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0027] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0029] In the description of the present application, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0030] Reference is made below to Figures 1 to 6 describe the combustion test machine of the embodiment of the present utility model.

[0031] As Figures 1 to 2 shown, the combustion test machine according to the embodiment of the present utility model includes: a chassis 100, a smoke exhaust hood 200, a specimen mechanism 300, and a burner mechanism 400; the smoke exhaust hood 200 is detachably provided on the top of the chassis 100; the specimen mechanism 300 is provided in the chassis 100 and includes a vertical adjustment assembly 310 and a clamping assembly 320, the clamping assembly 320 is connected to the output end of the vertical adjustment assembly and can be lifted and lowered under the drive of the vertical adjustment assembly, and the clamping assembly 320 is used for clamping a specimen; the burner mechanism 400 is provided in the chassis 100 and includes a first adjustment assembly 410, a second adjustment assembly 420, and a burner 430, the second adjustment assembly 420 is provided at the output end of the first adjustment assembly 410 and can move along a first direction under the drive of the first adjustment assembly 410, the burner 430 is provided at the output end of the second adjustment assembly 420 and can move along a second direction under the drive of the second adjustment assembly 420, and both the first direction and the second direction are along the horizontal direction and are perpendicular to each other.

[0032] It can be understood that this combustion testing machine includes a machine case 100, a smoke exhaust hood 200, a specimen mechanism 300, and a blowtorch mechanism 400; the smoke exhaust hood 200 is detachably arranged on the top of the machine case 100 and is used for exhausting the combustion smoke. Since the detachable structure of the smoke exhaust hood 200 enables the smoke exhaust hood 200 to be detached for cleaning after a period of use, thus avoiding blockage caused by dust accumulation, and further greatly extending the service life of the testing machine; the specimen mechanism 300 and the blowtorch mechanism 400 are both arranged in the machine case 100 and are respectively used for setting the specimen and the blowtorch 430. Among them, the specimen mechanism 300 includes a clamping assembly 320 for clamping the specimen and a vertical adjustment assembly 310 for adjusting the height of the clamping assembly 320, so as to be able to adjust the height of the specimen. The blowtorch mechanism 400 includes a combustible blowtorch 430, a second adjustment assembly 420, and a first adjustment assembly 410. The blowtorch 430 is arranged on the second adjustment assembly 420 and can horizontally move along the second direction under the drive of the second adjustment assembly 420. The second adjustment assembly is arranged on the first adjustment mechanism and can thus horizontally move along the first direction under the drive of the first adjustment mechanism. The first direction and the second direction are perpendicular, so that the horizontal position of the blowtorch 430 can be adjusted. In this way, by adjusting the vertical position of the specimen through the specimen mechanism 300 and adjusting the horizontal position of the blowtorch 430 through the blowtorch mechanism 400, it is possible to ensure that the flame of the blowtorch 430 always aligns with the deformed specimen after combustion. Therefore, during the combustion process of the specimen, it can always be burned by the flame of the blowtorch 430, thus greatly improving the accuracy of the test results; in summary, the combustion testing machine of the present application can not only improve the accuracy of the test results but also extend the service life of the testing machine.

[0033] It can be understood that a locking mechanism 500 is further included. The locking mechanism 500 is arranged on the top of the machine case 100 and includes a fourth driving component and a locking component 540. The output end of the fourth driving component is connected to the locking component 540 and can drive the locking component 540 to lock or release the smoke exhaust hood 200. For example, as Figures 1 to 4 shown, in this embodiment, this combustion testing machine further includes a locking mechanism 500 arranged on the top of the machine case 100. The locking mechanism 500 includes a fourth driving component and a locking component 540. The output end of the fourth driving component is connected to the locking component 540 and realizes the locking or unlocking of the smoke exhaust hood 200 by driving the locking component 540 to translate.

[0034] It should be understood that in addition to the locking form of the locking mechanism 500, the smoke exhaust hood 200 and the top of the machine case 100 can also be detachably connected by fasteners, so as to also realize the detachable connection of the smoke exhaust hood 200.

[0035] It is understandable that a limit frame 210 is fixedly disposed at the bottom of the smoke exhaust hood 200, and the outer edge of the limit frame 210 protrudes from the outer edge of the smoke exhaust hood 200. A relief position is formed at the bottom of the locking end of the locking assembly 540. The locking end of the locking assembly 540 can be driven by the fourth group of driving members to translate to the upper side of the outer edge of the limit frame 210 to limit the top of the limit frame 210. For example, Figure 4 As shown, in the present embodiment, a limit frame 210 whose outer edge protrudes from the smoke exhaust hood 200 is fixedly provided at the bottom of the smoke exhaust hood 200. Therefore, when the locking component 540 is driven by the fourth driving component to translate to the upper part of the outer edge of the limit frame 210, it can limit the top of the limit frame 210. At this time, the outer edge of the limit frame 210 is located at the avoidance position below the locking component 540, so that the smoke exhaust hood 200 can be locked. When the locking component 540 is driven away from the upper part of the outer edge of the limit frame 210 by the fourth driving component, the limit on the top of the limit frame 210 is released, so that the smoke exhaust hood 200 can be removed.

[0036] It is understandable that the fourth driving assembly includes an elastic member 510, which connects the top of the chassis 100 and the locking assembly 540 and is used to provide an elastic force for the locking assembly 540 to lock the smoke exhaust hood 200. Figure 4 As shown, in this embodiment, the fourth driving assembly includes an elastic member 510 , which can provide an elastic force to make the locking assembly 540 translate to above the limit frame 210 , that is, the exhaust hood 200 can be locked under the action of the elastic member 510 .

[0037] It can be understood that the fourth driving assembly also includes a rotating assembly 520 and a linkage assembly 530. The rotating assembly 520 is rotatably connected to the top of the chassis 100. One end of the linkage assembly 530 is hinged to the outer periphery of the rotating assembly 520, and the other end is hinged to the side of the locking assembly 540 away from the elastic member 510. The linkage assembly 530 can drive the locking assembly 540 to move toward the side close to the elastic member 510 under the rotation of the rotating assembly 520. For example, Figures 1 to 4As shown, in this embodiment, the fourth driving component further includes a rotating component 520 and a linkage component 530. The two ends of the linkage component 530 are respectively hinged to the rotating component 520 and the locking component 540. The rotating component 520 is rotatably connected to the chassis 100. Therefore, by rotating the rotating component 520, the linkage component 530 and the locking component 540 can be driven to move in sequence, so that the locking component 540 moves toward the side close to the elastic component 510. In this way, by squeezing the elastic component 510, the locking component 540 connected to the elastic component 510 releases the locking of the limiting frame 210, so that the smoke exhaust hood 200 can be disassembled. When the smoke exhaust hood 200 needs to be installed, the rotating component 520 is still rotated, so that the locking component 540 gives way to facilitate the installation of the smoke exhaust hood 200 in place. Subsequently, the locking component 540 resumes the locking of the limiting frame 210 under the elastic force of the elastic component 510.

[0038] Specifically, there are two sets of the linkage component 530, the locking component 540 and the elastic component 510 respectively, and the two sets are respectively arranged on both sides of the rotating component 520. The two sets of linkage components 530 are respectively hinged above and below the rotating component 520. Therefore, during the rotation of the rotating component 520, the linkage component 530 can be driven to squeeze the elastic component 510 to compress.

[0039] It can be understood that the locking mechanism 500 further includes a receiving box 550. The receiving box 550 is fixedly arranged on the top of the chassis 100. The elastic component 510 is arranged in the receiving box 550, and one end of the elastic component 510 is connected to the inner side wall of the receiving box 550. For example, as Figure 4 shown, in this embodiment, the locking mechanism 500 further includes a receiving box 550 fixedly arranged on the top of the chassis 100. The elastic component 510 is accommodated in the receiving box 550, and one end abuts against the inner side wall of the receiving box 550, and the other end is connected to the locking component 540. Specifically, a part of the locking component 540 can move along the inside of the receiving box 550. An opening is provided at the top of the receiving box 550 to avoid the other part of the locking component 540. Therefore, to a certain extent, the receiving box 550 can guide the movement of the locking component 540.

[0040] It can be understood that the combustion test machine further includes a control system. The control system is electrically connected to the specimen mechanism and the blowtorch mechanism respectively to control the driving of the vertical adjustment component, the first adjustment component and the second adjustment component respectively, so as to control the movement and reset of the clamping component and the blowtorch. For example, in this embodiment, by controlling the driving of the specimen mechanism and the blowtorch mechanism through the control system, the vertical position of the clamping component and the horizontal position of the blowtorch are adjusted. And after the test of one sample is completed, the clamping component and the blowtorch can be restored to their original positions through the control system. Specifically, by pressing the reset key of the control system, the clamping component and the blowtorch can be restored to their original positions.

[0041] It can be understood that the locking mechanism 500 further includes a guide rod 560. One end of the guide rod 560 is fixedly arranged on the inner side wall of the accommodation box 550. The elastic member 510 is sleeved on the guide rod 560 and is located between the inner side wall of the accommodation box 550 and the locking assembly 540. For example, as Figure 4 shown, in this embodiment, the locking mechanism 500 further includes a guide rod 560 horizontally connected to the inner side wall of the accommodation box 550. The elastic member 510 is sleeved on the guide rod 560, and the locking assembly 540 is sleeved on the guide rod 560. Therefore, the levelness of the movement of the locking assembly 540 can be further improved, and the deformation direction of the elastic member 510 can be restricted.

[0042] It can be understood that the blowtorch mechanism 400 further includes a blowtorch bracket 440. The blowtorch bracket is arranged on the second adjustment assembly and is used for arranging the blowtorch 430. An angle adjustment structure is arranged between the blowtorch bracket and the blowtorch 430 to adjust the tilt angle of the blowtorch 430. For example, as Figure 5 shown, in this embodiment, the blowtorch mechanism 400 further includes a blowtorch bracket arranged on the second adjustment assembly. The blowtorch 430 is arranged on the blowtorch bracket, and an angle adjustment structure is further arranged between the blowtorch 430 and the blowtorch bracket. Thus, the angle of the blowtorch 430 relative to the blowtorch bracket can be adjusted, and further the tilt angle of the blowtorch 430 relative to the sample can be adjusted, so that the blowtorch can be more adapted to and aligned with the sample.

[0043] It can be understood that the angle adjustment structure includes a clamping portion 431 arranged on the blowtorch 430 and a guide groove 441 arranged on the blowtorch bracket 440. The blowtorch bracket is provided with clamping grooves 442 at different heights, and the clamping grooves 442 communicate with the lower part of the guide groove 441. The clamping portion 431 can slide along the guide groove 441 and be clamped in the clamping grooves 442. For example, as Figure 5 shown, in this embodiment, the angle adjustment structure includes a clamping portion 431, a guide groove 441 and clamping grooves 442. Both the guide groove 441 and the clamping grooves 442 are arranged on the blowtorch bracket, and there are multiple clamping grooves 442 located at different heights. The clamping portion 431 is arranged on the blowtorch 430 and can slide along the guide groove 441 and be clamped in one of the clamping grooves 442. Therefore, when the clamping portion 431 slides along the guide groove 441, it can be clamped in the clamping grooves 442 at different heights, so that the angle of the blowtorch 430 can be adjusted, and thus the position of the blowtorch 430 in different clamping grooves 442 in the guide groove 441 can be adjusted according to the needs of the sample burning position. Specifically, the guide groove 441 has different slopes along the extending direction, so the clamping portion 431 will also have different tilting degrees when clamped in the clamping grooves 442 at different heights.

[0044] It can be understood that the guide groove 441 is sequentially connected by waist-shaped holes 4411 with gradually increasing slopes. For example, as Figure 5As shown, in this embodiment, the guiding groove 441 is formed by sequentially connecting kidney-shaped holes with gradually increasing slopes, and the clamping groove 442 communicates with the lower part of the connection of adjacent kidney-shaped holes, so that adjustments with different slopes can be achieved.

[0045] It should be understood that in some other embodiments, the guiding groove 441 can also be an arc-shaped groove.

[0046] It should be understood that as Figure 6 shown, the rotating assembly 520 includes a cylinder 521, an upper flange 522 and a lower flange 523 respectively provided at both ends of the cylinder 521. In use, the rotating assembly 520 is laid down and rotatably connected to the top of the chassis 100 through the cylinder 521. Two sets of linkage assemblies 530 on both sides are respectively connected to the upper end and the lower end of the lower flange 523. By manually rotating the upper flange 522, the linkage assembly 530, the locking assembly 540, and the elastic member 510 can be driven, so as to achieve unlocking.

[0047] It should be understood that as Figure 3 shown, the linkage assembly 530 includes a hinge rod 531 and a connecting rod 532. The connecting rod 532 slides horizontally along the horizontal groove on the top of the chassis 100, and both ends are respectively connected to the hinge rod 531 and the locking assembly 540. Both ends of the hinge rod 531 are respectively hinged to the connecting rod 532 and the lower flange 523.

[0048] The above has described the embodiments of the present application in detail with reference to the drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present application. In addition, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Claims

1. A combustion test machine, characterized in that: include: Chassis; The exhaust hood is detachable and located on the top of the chassis; The sample mechanism is arranged in the chassis and includes a vertical adjustment component and a clamping component, wherein the clamping component is connected to the output end of the vertical adjustment component and can be raised and lowered under the drive of the vertical adjustment component, and the clamping component is used to clamp the sample; A blowtorch mechanism is disposed in the chassis and includes a first adjusting component, a second adjusting component and a blowtorch. The second adjusting component is disposed at the output end of the first adjusting component and can move along a first direction under the drive of the first adjusting component. The blowtorch is disposed at the output end of the second adjusting component and can move along a second direction under the drive of the second adjusting component. The first direction and the second direction are both horizontal and perpendicular to each other.

2. The combustion testing machine according to claim 1, characterized in that: It also includes a locking mechanism, which is arranged on the top of the chassis and includes a fourth drive component and a locking component. The output end of the fourth drive component is connected to the locking component and can drive the locking component to lock or release the smoke exhaust hood.

3. The combustion tester according to claim 2, characterized in that: A limit frame is fixedly provided at the bottom of the smoke exhaust hood, and the outer edge of the limit frame protrudes from the outer edge of the smoke exhaust hood. An avoidance position is formed at the bottom of the locking end of the locking assembly. The locking end of the locking assembly can be translated to above the outer edge of the limit frame under the drive of the fourth group of driving components to limit the top of the limit frame.

4. The combustion testing machine according to claim 3, characterized in that: The fourth driving assembly includes an elastic member, which connects the top of the chassis and the locking assembly and is used to provide an elastic force for the locking assembly to lock the smoke exhaust hood.

5. The combustion testing machine according to claim 4, characterized in that: The fourth driving assembly also includes a rotating assembly and a linkage assembly. The rotating assembly is rotatably connected to the top of the chassis. One end of the linkage assembly is hinged to the outer periphery of the rotating assembly, and the other end is hinged to the side of the locking assembly away from the elastic member. The linkage assembly can drive the locking assembly to move toward the side close to the elastic member under the rotation of the rotating assembly.

6. The combustion testing machine according to claim 5, characterized in that: The locking mechanism further includes a accommodating box, which is fixedly arranged on the top of the chassis, the elastic member is arranged in the accommodating box, and one end of the elastic member is connected to the inner side wall of the accommodating box.

7. The combustion testing machine according to claim 1, characterized in that: It also includes a control system, which is electrically connected to the pattern mechanism and the blowtorch mechanism, respectively, so as to control the driving of the vertical adjustment component, the first adjustment component and the second adjustment component, respectively, so as to control the movement and resetting of the clamping component and the blowtorch.

8. The combustion testing machine according to claim 1, characterized in that: The blowtorch mechanism also includes a blowtorch bracket, which is arranged on the second adjustment component and is used to set the blowtorch. An angle adjustment structure is provided between the blowtorch bracket and the blowtorch to adjust the inclination angle of the blowtorch.

9. The combustion testing machine according to claim 8, characterized in that: The angle adjustment structure includes a clamping portion provided on the blowtorch and a guide groove provided on the blowtorch bracket. The blowtorch bracket is provided with clamping grooves of different heights. The clamping grooves are connected to the bottom of the guide grooves. The clamping portion can slide along the guide grooves and be clamped in the clamping grooves.

10. The combustion testing machine according to claim 9, characterized in that: The guide groove is formed by connecting waist-shaped holes with gradually increasing slopes in sequence.

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